JP6952565B2 - How to install the cutting device - Google Patents

Description

The present invention relates to a method of installing a cutting device for cutting a fluid pipe in a continuous flow state.

When arranging a control fluid such as a valve or a plug in a fluid pipeline, it is common practice to cut a part of the fluid pipe constituting the fluid pipeline and install the control fluid at the cut portion. ing. As a cutting device for cutting a fluid pipe, for example, as shown in Patent Document 1, a housing that is hermetically attached to the fluid pipe and a work that is attached to an opening of the housing and can open and close the inside of the housing. There is a cutting device mainly provided with a valve and a cutting machine attached to a working valve. In this cutting machine, a cutter made of a hole saw and a drive unit that drives the cutter are integrated, and the cutter is advanced by the drive unit with the work valve open, and the fluid pipe is in a continuous flow state in the housing. It is designed to cut a part. In such a cutting device, each member such as a housing, a work valve, and a cutting machine is suspended by a crane, transported to an installation position, and assembled to a fluid pipe.

Japanese Unexamined Patent Publication No. 2013-108594 (Page 5, Fig. 4)

However, in the case of installing a cutting device as in Patent Document 1, especially when the pipe diameter of the fluid pipe is large, the housing, the work valve, and the cutting machine on which the fluid pipe is fitted are also enlarged. Therefore, it is necessary to prepare a large crane having a high lifting capacity, and the movable range and installation space of the crane become large, so that there is a problem that a large space must be secured for the installation work of the cutting device. In particular, when a hole saw is used as a cutting machine as in Patent Document 1, a hole saw having a diameter larger than the outer diameter of the fluid pipe is required. Due to the heavy weight of the crane, it was unavoidable to increase the size of the crane.

The present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a method of installing a cutting device capable of reducing a load on a crane.

In order to solve the above problems, the method of installing the cutting device of the present invention is
A housing that is hermetically attached to the fluid pipe, a work valve that is attached to the opening of the housing and can open and close the inside of the housing, and a work valve that is attached to the work valve and is attached to the inside of the housing. A cutting device having a cutter for cutting the cutter and a cutting machine having a driving unit for driving the cutter, and driving the cutter by the driving unit to cut the fluid pipe in the housing in a continuous flow state. It ’s an installation method,
After the housing is hermetically attached to the fluid pipe and the work valve is attached to the housing, the cutter is installed on the work valve.
The drive unit is attached to the cutter installed on the work valve.
According to this feature, by installing the cutter and the drive unit separately, the load on the crane for installing the cutting machine can be reduced, so that the crane can be miniaturized.

A cylindrical body capable of accommodating the cutter is installed in the working valve, and the cutter is installed in the tubular body.
According to this feature, a cylindrical body installed on the work valve can be used to accurately install the cutter while positioning it.

The lid body detachably attached to the cutter is fixed to the tubular body so as to be hermetically closed.
According to this feature, the cutter can be held by using a lid that seals the tubular body in a sealed manner, so that it is not necessary to separately prepare a jig for holding the cutter, and the structure is simplified. Can be transformed into.

With the case for sealing the drive shaft of the drive unit separated from the lid, the cutter and the drive shaft are connected via the lid, and then the case is sealedly connected to the lid. It is characterized by doing.
According to this feature, the cutter and the drive shaft can be connected through the gap between the case of the drive unit and the lid, so that the configuration of a work hole or the like for connecting the cutter and the shaft of the drive unit can be omitted. .. Further, since the case and the lid are connected after the cutter and the shaft of the drive unit are connected, the connection work can be performed in a stable state between the case and the lid.

It is characterized in that the cutter and the drive shaft are connected in a state where a spacer is arranged between the case and the lid body.
According to this feature, it is possible to prevent the drive unit from falling during the connection work between the cutter and the shaft. Further, since the case is stabilized by placing the case on the spacer, it is easy to connect the cutter and the shaft.

It is a side sectional view which shows the state of attaching the valve box of a work valve to the housing in an Example. It is a side sectional view which shows the state of attaching a valve body and a valve stem to a valve box. It is a side sectional view which shows the state of attaching the mounting flange cylinder to a work valve in the process of installing a cutting machine. It is a side sectional view which shows the state of attaching a cutter and a lid body to a mounting flange cylinder in the process of installing a cutting machine. It is a side sectional view which shows the state which fixed the lid body to the mounting flange cylinder in the process of installing a cutting machine. It is explanatory drawing which shows the structure of a drive mechanism. It is a side sectional view which shows the state which connected the shaft member and a cutter in the process of installing a cutting machine. It is a side sectional view which shows the state of removing a jack and a fixing jig in the process of installing a cutting machine. It is a side sectional view which shows the state which connected the case part of the drive mechanism, and the lid body in the process of installing a cutting machine. It is a side sectional view which shows the state of cutting a fluid tube by a cutting machine. It is a side sectional view which shows the state which the section of the fluid tube was collected. It is a side sectional view which shows the state of attaching a cylindrical member to a work valve in the process of installing a valve introduction machine. It is a side sectional view which shows the mode that the partition wall, the opening / closing shaft and the valve body in a butterfly valve were attached to a cylindrical member in the process of installing a valve introduction machine. It is a side cross-sectional view which shows the appearance that the butterfly valve was constructed by attaching the upper lid part in the process of installing a valve introduction machine. It is explanatory drawing which shows the state that the mounting flange cylinder was attached to the cylindrical member in the process of installing a valve introduction machine. It is a side sectional view which shows the state of attaching a valve hanging metal fitting and a lid body in the process of installing a valve introduction machine. It is a side sectional view which shows the state that the lid body was fixed to the mounting flange cylinder in the process of installing a valve introduction machine. It is a side sectional view which shows the state which connected the shaft member and a valve hanging metal fitting in the process of installing a valve introduction machine. It is a side sectional view which shows the state of removing a jack and a fixing jig in the process of installing a valve introduction machine. It is a side sectional view which shows the state which the butterfly valve and the valve suspension metal fittings were connected in the process of installing a valve introduction machine. It is a side sectional view which shows the state that the butterfly valve was installed at the cut part of a fluid pipe by a valve introduction machine. It is a side sectional view which shows the state which the valve hanging metal fitting was pulled up into a cylindrical member and a mounting flange cylinder. It is a side sectional view which shows the working valve in the modification 1. FIG. It is a side sectional view which shows the working valve in the modification 2. FIG.

A mode for carrying out the installation method of the cutting device according to the present invention will be described below based on examples.

In the embodiment, FIGS. 1 to 24 show a series of flows from cutting a predetermined portion of the existing fluid pipe 1 constituting the flow path constituent member to installing the butterfly valve 10 (control fluid) at the cut portion. It will be explained with reference to.

As shown in FIG. 1, the circumference of a predetermined portion of the fluid pipe 1 buried in the ground is excavated, and the housing 2 having a two-divided structure having a branch portion 2a opening upward is enclosed in a sealed shape. The fluid in the fluid pipe 1 may be, for example, clean water, industrial water, sewage, or the like, or a gas or a gas-liquid mixture of a gas and a liquid. Furthermore, although the housing 2 has a two-divided structure in this embodiment, it may have another plurality of divided structures, and the divided housings may be joined by welding or bolting via packing. ..

The fluid pipe 1 is a steel pipe and is formed in a substantially circular shape in cross section. The fluid pipe according to the present invention may be made of ductile cast iron, other cast iron, other metal, concrete, vinyl chloride, polyethylene, polyolefin, or the like. Furthermore, the inner peripheral surface of the fluid pipe may be coated with an epoxy resin layer, mortar, plating or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe by powder coating.

Further, when the housing 2 is attached to the fluid pipe 1 in a sealed manner, concrete foundations 9 and 9 are formed below the housing 2 to support the weight around the housing 2 and to prevent the fluid pipe 1 from bending or the like. To prevent. As long as the weight of the housing 2, the cutting machine 5 and the valve introducing machine 6 described later can be supported, the concrete foundations 9 and 9 are not limited, and a jack or the like may be used.

Next, a step of attaching the work valve 4 capable of closing the opening of the branch portion 2a to the branch portion 2a (opening portion) of the housing 2 will be described. First, as shown in FIG. 1, the valve box 41 (first divided body) constituting the work valve 4 is suspended by a hanging tool C and a wire W having hooks suspended from above by a crane (not shown). Then, it is placed on the flange 2b of the branch portion 2a, and the flange 2b and the valve box 41 are fixed with bolts and nuts (not shown) while adjusting the position of the valve box 41 on the flange 2b. The crane used in this embodiment is preferably, for example, a mobile rough terrain crane. Needless to say, the crane is increased in size according to its lifting capacity, and the heaviest member among the members described later is lifted. Possible specifications are selected while considering the permissible lifting load at each turning radius. Further, the installation area of the crane, including the outriggers and the like, often requires a larger area than the excavation area of the fluid pipe 1.

In this embodiment, even after the valve box 41 is placed on the flange 2b of the branch portion 2a, the wire W is connected to the valve box 41 in a slightly loosened state in order to ensure safety. However, the suspension tool C and the wire W may be removed from the valve box 41. Further, in order to facilitate the position adjustment of the valve box 41, the position of the valve box 41 may be adjusted with respect to the flange 2b while the valve box 41 is slightly suspended by a crane.

The valve box 41 has a substantially tubular shape penetrating in the vertical direction, and a slide groove 41b extending in a substantially horizontal direction is formed from an opening 41a provided on one side thereof, and is formed on the back side of the slide groove 41b. A valve seat portion 41c is formed (on the side opposite to the opening 41a). The weight of the valve box 41 in this embodiment is approximately 4500 kg in this embodiment. Since an O-ring (not shown) is pressure-welded between the flange 2b and the valve box 41, the branch portion 2a and the valve box 41 are connected in a sealed manner. Hereinafter, the weight of each member is merely an example, and can be changed to an appropriate weight.

Next, as shown in FIG. 2, the valve body 42, the valve lid 43, and the valve rod 44 (second split body) constituting the working valve 4 are suspended by the suspending tool C and the wire W in a unitized state. Then, it is lowered to the side of the opening 41a of the valve box 41. Then, in this suspended state, the valve lid 43 is fixed to the side of the valve box 41 with bolts and nuts (see FIG. 3). Specifically, the valve body 42 is attached so as to be able to advance and retreat between the position where the valve body 42 is stored in the valve lid 43 by the valve rod 44 and the position where the valve body 42 protrudes from the valve lid 43, and the position where the valve body 42 is stored in the valve lid 43. In, a part of the valve body 42 (the end on the side opposite to the valve rod 44 (valve box 41 side)) protrudes from the opening 43a of the valve lid 43.

When fixing the valve lid 43 to the side of the valve box 41, the protruding portion of the valve body 42 protruding from the opening 43a of the valve lid 43 is inserted into the opening 41a of the valve box 41 and hits the valve box 41. The valve lid 43 is slid horizontally until it comes into contact with the valve lid 43, and the valve lid 43 and the valve box 41 are fixed with bolts and nuts (not shown). The weight of the valve body 42, the valve lid 43, and the valve rod 44 in this embodiment is approximately 6000 kg in the unitized state.

Further, since the packing S1 is pressure-welded between the valve lid 43 and the valve box 41 in the circumferential direction, the sealing property between the valve lid 43 and the valve box 41 can be ensured (enlarged portion of FIG. 3). reference). In this embodiment, the packing S1 is press-fitted into the concave groove provided on the valve lid 43 side, but the present invention is not limited to this, and the concave groove is provided on the valve box 41 side in the concave groove. The packing S1 may be press-fitted.

In this embodiment, the unitized valve body 42, the valve lid 43, and the valve rod 44 are attached to the valve box 41 while being suspended by the suspending tool C and the wire W, but the present invention is not limited to this. For example, a mounting table may be arranged in the vicinity of the valve box 41, and the valve body 42, the valve lid 43, and the valve rod 44 may be mounted on the mounting table and mounted on the valve box 41.

In this embodiment, the valve lid 43 and the valve box 41 are fixed by bolts and nuts, but the present invention is not limited to this, and the valve lid 43 and the valve box 41 may be fixed by another fixing means such as a vise. , May be fixed by welding or the like.

Next, a step of installing a cutting machine 5 for cutting the fluid pipe 1 above the working valve 4 will be described. As shown in FIG. 3, first, the mounting flange cylinder 51 (cylindrical body) penetrating in the vertical direction is suspended by the suspending tool C and the wire W and lowered to the upper part of the valve box 41, and above the valve box 41. Fix the mounting flange cylinder 51 with bolts and nuts (not shown). The weight of the mounting flange cylinder 51 in this embodiment is approximately 2600 kg. Further, since an O-ring (not shown) is pressure-welded between the mounting flange cylinder 51 and the valve box 41, the valve box 41 and the mounting flange cylinder 51 are connected in a sealed manner.

In this embodiment, even after the mounting flange cylinder 51 is placed on the valve box 41, the wire W is slightly loosened on the mounting flange cylinder 51 and connected to a crane (not shown) to ensure safety. However, the present invention is not limited to this, and the crane C and the wire W may be removed from the mounting flange cylinder 51. Further, in order to facilitate the position adjustment of the mounting flange cylinder 51, the position of the valve box 41 may be adjusted with the mounting flange cylinder 51 slightly suspended by a crane.

Next, as shown in FIG. 4, the cutter 52 is temporarily installed on the mounting flange cylinder 51. Specifically, with the lid 53 of the mounting flange cylinder 51 connected above the cutter 52, the lid 53 is suspended by the hanging tool C and the wire W and lowered to above the mounting flange cylinder 51. The cutter 52 is composed of a cylindrical member 52a having a cutting blade at the peripheral end and a center drill 52b coaxially arranged on the cylindrical member 52a and protruding toward the front of the drilling blade, and the cylindrical member 52a and the center drill 52b. Is fixed. Further, above the cylindrical member 52a and the center drill 52b, an adapter 54 having an annular protrusion 54a formed at the upper end thereof is attached so as not to rotate relative to each other.

Further, the lid 53 is formed with a through hole 53a penetrating in the vertical direction at the center thereof, and the adapter 54 is inserted through the through hole 53a. Further, the lid 53 is formed with a plurality of recesses 53b recessed in the outer radial direction from the inner peripheral surface of the through hole 53a in the circumferential direction, and the recess 53b can advance and retreat in the radial direction of the through hole 53a. A fixing jig 55 is arranged. The cutter 52 and the lid 53 are integrated by the fixing jig 55 projecting in the inner diameter direction of the through hole 53a and engaging with the lower surface of the annular protrusion 54a of the adapter 54.

The weight of the cutter 52 in this embodiment is approximately 2910 kg, the weight of the lid 53 is approximately 1900 kg, the weight of the adapter 54 is approximately 290 kg, and the total weight of these is approximately 290 kg. It is 5100 kg.

As shown in FIG. 5, with the lid 53 placed above the mounting flange cylinder 51, the mounting flange cylinder 51 and the lid 53 are aligned and fixed with bolts and nuts (not shown). At this time, the cutter 52 is housed inside the mounting flange cylinder 51.

Further, as shown in the enlarged portion of FIG. 5, the packing S2 is pressure-welded between the mounting flange cylinder 51 and the lid 53 in the circumferential direction, so that the mounting flange cylinder 51 and the lid 53 are in contact with each other. It is possible to secure the sealing property between them. In this embodiment, the packing S2 is press-fitted into the concave groove provided on the lid 53 side, but the present invention is not limited to this, and the concave groove is provided on the mounting flange cylinder 51 side. The packing S2 may be press-fitted into the container.

In this embodiment, even after the lid 53 is placed on the mounting flange cylinder 51, the wire W is connected to the crane 53 with the wire W slightly loosened to ensure safety. Not limited to this, the hanging tool C and the wire W may be removed from the lid 53. Further, in order to facilitate the position adjustment of the mounting flange cylinder 51, the position of the valve box 41 may be adjusted with the mounting flange cylinder 51 slightly suspended by a crane.

Next, the drive mechanism 8 (drive unit) of the cutting machine 5 is connected to the cutter 52. First, the structure of the drive mechanism 8 will be described with reference to FIG.

As shown in FIG. 6, the drive mechanism 8 moves the shaft member 81, the gripping member 82 capable of gripping or releasing the shaft member 81, and the gripping member 82 in the axial range of the shaft member 81. It is mainly composed of an advancing / retreating member 83, a regulating member 84 capable of restricting or deregulating the shaft member 81 at a position below the advancing / retreating member 83, and a base member 85 to which the advancing / retreating member 83 and the restricting member 84 are attached. ing. The weight of the drive mechanism 8 in this embodiment is approximately 6060 kg.

The base member 85 is provided with a plurality of support columns 85a that stand upright, and the advancing / retreating member 83 is attached so as to be slidable in the vertical direction along the support columns 85a. That is, the shaft member 81 can be slid in the vertical direction by gripping the shaft member 81 by the gripping member 82 and moving the advancing / retreating member 83 along the support column portion 85a in that state.

Further, below the base member 85, a tubular case portion 86 through which the shaft member 81 can be inserted is provided. A packing S3 for sealing between the inner peripheral surface of the case portion 86 and the outer peripheral surface of the shaft member 81 is provided, and an annular groove 86a formed in an annular shape is formed on the lower surface of the case portion 86. An annular packing S4 is press-fitted into the annular groove 86a.

Further, a rotary motor 87 is fixedly attached to a part of the advancing / retreating member 83, and the shaft member 81 is subjected to a rotational force by applying a rotational force to the grip member 82 in a state where the shaft member 81 is gripped by the rotary motor 87. The rotation can be transmitted, and the cutter 52 can be rotated by rotating the shaft member 81. By preparing a plurality of shaft members 81, they can be added in the axial direction to increase the length in the axial direction, and the weight and height can be reduced due to such a added structure. ..

As shown in FIG. 7, when connecting the drive mechanism 8 to the cutter 52, a plurality of jacks 7 (spacers) are arranged in the circumferential direction of the upper flange 53c of the lid 53, and the shaft member 81 is predetermined. The lower end of the shaft member 81 is projected downward from the case portion 86, the drive mechanism 8 is suspended by the hanging tool C and the wire W, and the case portion 86 is placed on the jack 7. do. Next, the operator accesses from the gap between the case portion 86 formed by the jack 7 and the upper flange 53c of the lid 53, and connects the shaft member 81 and the adapter 54 with bolts and nuts N1.

In this embodiment, even after the drive mechanism 8 is placed on the jack 7, the drive mechanism 8 is connected to the crane with the wire W slightly loosened to ensure safety. The hanger C and the wire W may be removed from the drive mechanism 8 without limitation. Further, in order to facilitate the position adjustment of the drive mechanism 8, the position of the shaft member 81 and the adapter 54 may be adjusted while the drive mechanism 8 is slightly suspended by a crane.

Next, as shown in FIG. 8, the drive mechanism 8, the adapter 54, and the cutter 52 are lifted slightly upward by a crane, the jack 7 is removed from between the case portion 86 and the lid 53, and the fixing jig 55 is recessed. It is retracted into 53b. At this time, since the cutter 52 (approximately 2910 kg), the adapter 54 (approximately 290 kg), and the drive mechanism 8 (approximately 6060 kg) are lifted by the crane, the weight applied to the crane is approximately 9260 kg. At this time, a plurality of jacks 7 (spacers) are arranged in the circumferential direction of the lower flange 53d of the lid 53, the drive mechanism 8 is placed on the jacks 7, and the weight is received by the crane. The weight may be reduced.

Subsequently, as shown in FIG. 9, the drive mechanism 8 is suspended so that the case portion 86 is placed on the upper flange 53c of the lid 53 by a crane, and the case 86 and the lid 53 are hung by bolts and nuts (not shown). And fix. As a result, the cutting machine 5 is configured by the mounting flange cylinder 51, the cutter 52, the lid 53, the adapter 54, and the drive mechanism 8, and the cutting device is configured by the housing 2, the work valve 4, and the cutting machine 5. At this time, it goes without saying that the center drill 52b is adjusted so as not to come into contact with the valve body 42.

Further, when the case portion 86 and the lid 53 are fixed, the packing S4 is pressed against the case portion 86 and the upper flange 53c of the lid 53, so that the case portion 86 and the lid 53 are sealed. Sex can be secured. In this embodiment, the packing S4 is press-fitted into the annular groove 86a formed on the lower surface of the case portion 86, but the present invention is not limited to this, and the annular groove is provided on the upper flange 53c side of the lid 53. The packing S4 may be press-fitted into the annular groove.

In this embodiment, even after the case portion 86 is placed on the lid 53, the wire W is connected to the drive mechanism 8 in a slightly loosened state in order to ensure safety. The hanger C and the wire W may be removed from the drive mechanism 8. Further, in order to facilitate the position adjustment of the drive mechanism 8, the position of the case portion 86 and the lid 53 may be adjusted while the drive mechanism 8 is slightly suspended by a crane.

Next, a step of cutting the fluid pipe 1 with the cutting machine 5 will be described. As shown in FIG. 10, first, the valve body 42 of the work valve 4 is retracted to open the branch portion 2a, and the grip member 82 described above grips the outer peripheral surface of the shaft member 81 on the rear end side. Next, the rotary motor 87 is driven to rotate the shaft member 81 and the cutter 52. Then, the advancing / retreating member 83 is advanced toward the fluid pipe 1 in a state where the shaft member 81 and the cutter 52 are rotated. According to this, first, the center drill 52b of the cutter 52 drills the pipe wall of the fluid pipe 1.

The advancing movement of the shaft member 81 and the cutter 52 is performed in a range from the gripping position of the gripping member 82 to the position close to the regulating member 84, and the shaft member 81 slides on the packing S3 to move forward. Then, the shaft member 81 and the cutter 52 after the progress movement is completed are restricted by the regulation member 84. After that, the rotation of the shaft member 81 by the rotary motor 87 is stopped, another shaft member 81'is connected to the upper end of the shaft member 81, and the above steps are repeated so that the cylindrical member 52a of the cutter 52 cuts the fluid pipe 1. .. At this time, it is not always the case that another shaft member 81'is connected, and the cutting may be completed by using the shaft member 81 having a predetermined length in advance.

As shown in FIG. 11, when the fluid pipe 1 is cut by the cutter 52, the section 1a formed by cutting the fluid pipe 1 is held in the cylindrical member 52a. Then, by moving the shaft member 81 and the cutter 52 backward in the reverse procedure of the above step, the shaft member 81 and the cutter 52 are pulled up inside the mounting flange cylinder 51 together with the section 1a, and the branch portion 2a is closed by the valve body 42 of the working valve 4. , The cutting work of the fluid pipe 1 is completed.

As described above, after the housing 2 is attached to the fluid pipe 1 in a sealed manner and the work valve 4 is attached to the branch portion 2a of the housing 2, the cutter 52, the lid 53, and the adapter 54 are attached to the work valve 4. The cutting machine 5 is configured by installing the drive mechanism 8 in a unitized state and attaching the drive mechanism 8 to the cutter 52, the lid 53, and the adapter 54 installed in the work valve 4. According to this, since the cutter 52, the lid 53, the adapter 54 (approximately 5100 kg) and the drive mechanism 8 (approximately 6060 kg) in the cutting machine 5 can be separately transported, the working valve 4 is provided with the cutting machine 5 assembled. Compared with the case of installation (approximately 11160 kg), the load on the crane can be dispersed and reduced, so that the crane can be miniaturized and the work space for installing the cutting machine 5 can be saved.

In particular, when a hole saw such as a cutter 52 is used as in this embodiment, a cylindrical member 52a having a diameter larger than that of the fluid pipe 1 is required, so that the configuration of the cutting machine 5 is also increased. Even in this case, since the cutter 52, the lid 53, the adapter 54, and the drive mechanism 8 are installed separately, the load on the crane can be distributed and the crane can be suitably miniaturized.

Here, from the viewpoint of workability, a form in which the cutter 52, the lid 53, and the adapter 54 are fixed to the mounting flange cylinder 51 in a unitized state has been illustrated, but the present invention is not limited to this, and for example, the cutter 52, the lid, and the lid 54 are fixed. The load on the crane may be further dispersed and reduced by mounting the 53 and the adapter 54 separately and in order on the mounting flange cylinder 51. In this case, a holding means for holding the cutter 52 in the mounting flange cylinder 51 may be prepared.

Further, a mounting flange cylinder 51 (approximately 2600 kg) capable of accommodating the cutter 52 is installed in the work valve 4, and a guide is provided in the mounting flange cylinder 51 in order to install the cutter 52, the lid 53 and the adapter 54 in the mounting flange cylinder 51. The cutter 52 is inserted while the cutter 52 is being inserted, and the cutter 52 can be accurately installed on the fluid pipe 1 while being positioned. Further, the load on the crane can be reduced as compared with the case where the cutter 52, the lid 53, the adapter 54 and the mounting flange cylinder 51 are installed in the work valve 4 in a unitized state (approximately 7700 kg).

Further, since the cutter 52 is housed in the mounting flange cylinder 51 in a state where the cutter 52 and the lid 53 are connected by the fixing jig 55, the lid 53 and the mounting flange cylinder 51 are fixed. The cutter 52 can be held by using the lid 53 that seals the mounting flange cylinder 51 in a sealed manner. According to this, it is not necessary to prepare a special jig for holding the cutter 52 separately from the lid 53, and the structure can be simplified.

Further, in a state where the case portion 86 of the drive mechanism 8 is separated from the lid 53, the cutter 52 (adapter 54) and the shaft member 81 of the drive mechanism 8 are connected via the through hole 53a of the lid 53, and then the case portion 86 is connected to the shaft member 81 of the drive mechanism 8. The case portion 86 is connected to the lid 53 in a sealed manner. According to this, since the cutter 52 and the shaft member 81 can be connected from the gap between the case portion 86 of the drive mechanism 8 and the lid 53, a work hole or the like for connecting the cutter 52 and the shaft member 81 or the like can be connected. Can be simplified without forming the case portion 86 or the lid 53. Further, since the case portion 86 and the lid body 53 are connected after the cutter 52 and the shaft member 81 are connected, the case portion 86 and the lid body 53 are guided by the adapter 54 and the shaft member 81, and are in a stable state. You can connect with.

Further, in a state where the jack 7 as a spacer is arranged between the case portion 86 and the lid 53, the operator accesses from the gap between the case 86 formed by the jack 7 and the upper flange 53c of the lid 53. Since the shaft member 81 and the adapter 54 are connected by the bolt nut N1, the drive mechanism 8 can be prevented from falling during the connection work between the shaft member 81 and the adapter 54, and the safety is high. Further, by mounting the case portion 86 on the jack 7, the case portion 86 is more stable than in the state of being suspended by the hanging tool C and the wire W, so that it is easy to connect the shaft member 81 and the adapter 54.

Although not particularly shown, the drive mechanism 8 is first removed from the lid 53 while the branch portion 2a is closed by the valve body 42 of the work valve 4, and the lid 53 and the cutter 52 are attached together with the section 1a. By removing from the cylinder 51 and removing the mounting flange cylinder 51 from the work valve 4, the removal work of the cutting machine 5 is completed. In this way, since each member constituting the cutting machine 5 can be separately transported by the crane, the load on the crane at the time of removing the cutting machine 5 can be reduced.

Next, a step of installing the valve introduction machine 6 for installing the butterfly valve 10 at the position where the fluid pipe 1 is cut will be described. As shown in FIG. 12, first, the cylindrical member 61 (cylindrical body) penetrating in the vertical direction is suspended by the suspending tool C and the wire W while the branch portion 2a is closed by the valve body 42 of the working valve 4. Hold it and lower it to the upper part of the work valve 4, and fix the cylindrical member 61 above the work valve 4 with bolts and nuts (not shown). The weight of the cylindrical member 61 in this embodiment is approximately 3000 kg. Further, since an O-ring (not shown) is pressure-welded between the cylindrical member 61 and the working valve 4 (valve box 41), the cylindrical member 61 and the working valve 4 are connected in a sealed manner.

In this embodiment, even after the cylindrical member 61 is placed on the work valve 4, the wire W is connected to the cylindrical member 61 in a slightly loosened state in order to ensure safety. The hanger C and the wire W may be removed from the cylindrical member 61. Further, in order to facilitate the position adjustment of the cylindrical member 61, the position of the valve box 41 and the cylindrical member 61 may be adjusted while the cylindrical member 61 is slightly suspended by a crane.

Next, a step of temporarily installing the butterfly valve 10 on the cylindrical member 61 will be described. First, the structure of the butterfly valve 10 will be described with reference to FIG.

As shown in FIG. 14, the butterfly valve 10 controls the flow path of the fluid pipe 1 between a state in which the fluid can pass and a state in which the fluid cannot pass, and the partition wall 11 having an opening at a substantially central portion and the partition. An opening / closing shaft 12 rotatably attached to the upper end of the wall 11, a valve body 13 rotatably provided around the opening / closing shaft 12 to open / close the opening of the partition wall 11, and an upper end of the partition wall 11. A substantially circular upper lid portion 14 (cover body portion) extending in a substantially horizontal direction, which is connected to the above in a sealed manner, is provided. Packing S5 is fixed to the partition wall 11 over both side surfaces and the bottom surface, packing S6 is fixed to the upper lid portion 14 over the entire circumference of the outer peripheral surface thereof, and the packings S5 and S6 are continuous. Connected like this. The total weight of the butterfly valve 10 in this embodiment is approximately 9540 kg. Furthermore, it goes without saying that the partition wall 11 and the upper lid portion 14 are sealed with packing or the like.

As shown in FIG. 13, when the butterfly valve 10 is temporarily installed on the cylindrical member 61, first, the hanger C and the suspension tool C and the valve body 13 (main body portion) are integrated with the partition wall 11, the opening / closing shaft 12, and the valve body 13 (main body). It is suspended by a wire W and lowered to a position where it is accommodated in the cylindrical member 61. At this time, the valve body 13 is arranged so as to be substantially parallel to the pipe axis direction (a state in which the opening of the partition wall 11 is opened).

Then, the locking member 62 (locking portion, holding portion) is inserted so as to partially protrude into the cylindrical member 61 from the outside through a plurality of window portions 61a formed in the circumferential direction of the cylindrical member 61. As a result, the protruding piece 11a protruding outward from the partition wall 11 is placed (locked) on the tip of the locking member 62, and the partition wall 11, the opening / closing shaft 12, and the valve body 13 are formed by the cylindrical member 61. Will be held in. Since a recess 62a capable of accommodating a part of the valve body 13 is formed in the lower portion on the tip end side of the locking member 62, the locking member 62 and the valve body 13 do not interfere with each other.

Next, as shown in FIG. 14, the upper lid portion 14 is suspended by the hanging tool C and the wire W and placed on the upper portion of the partition wall 11 with the opening / closing shaft 12 inserted. Then, the upper lid portion 14 and the partition wall 11 are connected in a sealed manner by a fixing means (not shown) to form the butterfly valve 10.

In this embodiment, even after the upper lid portion 14 is placed on the partition wall 11, the wire W is connected to the upper lid portion 14 in a slightly loosened state in order to ensure safety. The hanging tool C and the wire W may be removed from the upper lid portion 14. Further, in order to facilitate the position adjustment of the upper lid portion 14, the position of the upper lid portion 14 and the partition wall 11, the opening / closing shaft 12 and the valve body 13 may be adjusted while the upper lid portion 14 is slightly suspended by a crane. good.

Furthermore, in this embodiment, the embodiment in which the butterfly valve 10 is formed on the cylindrical member 61 by fixing the upper lid portion 14 to the integrated partition wall 11, the opening / closing shaft 12 and the valve body 13 is illustrated. The butterfly valve 10 may be configured by separately installing the partition wall 11, the opening / closing shaft 12, the valve body 13, and the upper lid portion 14 in this order. Further, the butterfly valve 10 may be formed by integrating the partition wall 11 and the valve body 13, integrating the opening / closing shaft 12 and the upper lid portion 14, and assembling them. That is, at least the upper lid portion 14 can be freely changed as long as it is separated from other members (main body portion) and the butterfly valve 10 is formed by assembling them.

Next, as shown in FIG. 15, the mounting flange cylinder 63 penetrating in the vertical direction is suspended by the hanging tool C and the wire W and lowered to the upper part of the cylindrical member 61, and the mounting flange cylinder 63 is lowered above the cylindrical member 61. 63 is fixed by bolts and nuts (not shown). The weight of the mounting flange cylinder 63 in this embodiment is approximately 2600 kg.

In this embodiment, even after the mounting flange cylinder 63 is placed on the cylindrical member 61, the wire W is connected to the mounting flange cylinder 63 in a slightly loosened state in order to ensure safety. However, the suspension tool C and the wire W may be removed from the mounting flange cylinder 63. Further, in order to facilitate the position adjustment of the mounting flange cylinder 63, the position of the mounting flange cylinder 63 and the cylindrical member 61 may be adjusted while the mounting flange cylinder 63 is slightly suspended by a crane.

Further, as shown in the enlarged view of FIG. 15, an annular groove 63a is formed on the lower surface of the mounting flange cylinder 63, and the annular packing S7 is press-fitted into the annular groove 63a. When the cylindrical member 61 and the mounting flange cylinder 63 are fixed, the packing S7 is pressed against the cylindrical member 61 and the mounting flange cylinder 63, so that the sealing property between the cylindrical member 61 and the mounting flange cylinder 63 is ensured. can. In this embodiment, the packing S7 is press-fitted into the annular groove 63a formed on the lower surface of the mounting flange cylinder 63, but the present invention is not limited to this, and the annular groove is provided on the cylindrical member 61 side. The packing S7 may be press-fitted into the annular groove.

Next, as shown in FIG. 16, a valve suspension fitting 64 connected to the butterfly valve 10 is temporarily installed on the mounting flange cylinder 63. Specifically, with the lid 65 of the mounting flange cylinder 63 connected above the valve hanging bracket 64, the lid 65 is suspended by the hanging tool C and the wire W and lowered to above the mounting flange cylinder 63. The valve suspension fitting 64 is between a mounting surface portion 64a facing in a substantially horizontal direction, a tubular shaft portion 64c extending upward from a through hole 64b provided at a substantially center of the mounting surface portion 64a, and a mounting surface portion 64a and a shaft portion 64c. It is provided with a reinforcing rib 64d provided over the same. Further, an adapter 66 is connected to the upper end portion of the shaft portion 64c.

Further, the lid body 65 is formed with a through hole 65a penetrating in the vertical direction at the center thereof, and the adapter 66 is inserted through the through hole 65a. Further, the lid body 65 is formed with a plurality of recesses 65b recessed in the outer radial direction from the inner peripheral surface of the through hole 65a in the circumferential direction, and the recesses 65b can advance and retreat in the radial direction of the through hole 65a. A fixing jig 67 is arranged. The valve suspension fitting 64 and the lid 65 are integrated by projecting the fixing jig 67 in the inner diameter direction of the through hole 65a and engaging the fixing jig 67 with the lower surface of the annular protrusion 66a of the adapter 66.

The weight of the valve suspension fitting 64 in this embodiment is approximately 2000 kg, the weight of the lid 65 is approximately 1900 kg, and the weight of the adapter 66 is approximately 270 kg, and the total weight of these is approximately 270 kg. Is approximately 4170 kg.

As shown in FIG. 17, with the lid 65 placed on the upper end of the mounting flange cylinder 63, the mounting flange cylinder 63 and the lid 65 are aligned and fixed with bolts and nuts (not shown). In this embodiment, even after the lid 65 is placed on the mounting flange cylinder 63, the wire W is connected to the crane 65 with the wire W slightly loosened to ensure safety. Not limited to this, the hanging tool C and the wire W may be removed from the lid 65. Further, in order to facilitate the position adjustment of the lid 65, the positions of the mounting flange cylinder 63 and the lid 65 may be adjusted with the lid 65 slightly suspended by a crane.

As shown in the enlarged portion of FIG. 17, the packing S8 is pressure-welded between the mounting flange cylinder 63 and the lid 65 in the circumferential direction, so that the packing S8 is between the mounting flange cylinder 63 and the lid 65. Sealability can be ensured. In this embodiment, the packing S8 is press-fitted into the concave groove provided on the lid 65 side, but the present invention is not limited to this, and the concave groove is provided on the mounting flange cylinder 63 side. Packing S8 may be press-fitted into the.

Next, the drive mechanism 8 as the insertion machine of the valve introduction machine 6 is connected to the valve suspension fitting 64. Since the drive mechanism 8 is the same as the one used at the time of cutting the fluid pipe 1, the description of the structure of the drive mechanism 8 will be omitted.

As shown in FIG. 18, when connecting the drive mechanism 8 to the valve suspension fitting 64, the shaft member 81 is advanced downward by a predetermined length in advance, and the lower end portion of the shaft member 81 is located below the case portion 86. A plurality of jacks 7 (spacers) are arranged in the circumferential direction of the upper flange 65c of the lid 65, the drive mechanism 8 is suspended by a crane, and the case portion 86 is placed on the jack 7. Next, the operator accesses from the gap between the case portion 86 formed by the jack 7 and the upper flange 65c of the lid body 65, and connects the shaft member 81 and the adapter 66 with bolts and nuts N2.

Next, as shown in FIG. 19, the drive mechanism 8, the adapter 66, and the valve suspension bracket 64 are lifted slightly upward by a crane, the jack 7 is removed from between the case portion 86 and the lid 65, and the fixing jig 55 is removed. Is retracted into the recess 53b. At this time, since the valve hanging bracket 64 (about 2000 kg), the adapter 66 (about 270 kg), and the drive mechanism 8 (about 6060 kg) are lifted by the hanging tool C and the wire W, the weight applied to the hanging tool C and the wire W is about 8330 kg. It has become. At this time, a plurality of jacks 7 (spacers) are arranged in the circumferential direction of the lower flange 65d of the lid body 65, the drive mechanism 8 is placed on the jacks 7, and the weight is received by the crane. The weight may be reduced.

Next, although not particularly shown, the drive mechanism 8 is suspended so that the case portion 86 is placed on the upper flange 65c of the lid body 65 by the hanging tool C and the wire W, and the case portion 86 and the lid body are hung by bolts and nuts (not shown). Fix with 65. Further, when the case portion 86 and the lid body 65 are fixed, the packing S4 is pressed against the case portion 86 and the upper flange 65c of the lid body 65, so that the case portion 86 and the lid body 65 are sealed. Sex can be secured. In this embodiment, the form in which the packing S4 is arranged on the lower surface of the case portion 86 is illustrated, but the present invention is not limited to this, and an annular groove is provided on the upper flange 65c side of the lid 65, and the annular groove is provided. The packing S4 may be press-fitted.

In this embodiment, even after the case portion 86 is placed on the lid 65, the wire W is connected to the drive mechanism 8 in a slightly loosened state in order to ensure safety. The hanger C and the wire W may be removed from the drive mechanism 8. Further, in order to facilitate the position adjustment of the drive mechanism 8, the position of the case portion 86 and the lid 65 may be adjusted while the drive mechanism 8 is slightly suspended by a crane.

Next, as shown in FIG. 20, the valve suspension fitting 64 is lowered by the drive mechanism 8, and the mounting surface portion 64a of the valve suspension fitting 64 and the upper lid portion 14 of the butterfly valve 10 are connected by bolts and nuts (not shown). As a result, the valve introduction machine 6 is composed of the cylindrical member 61, the mounting flange cylinder 63, the valve suspension fitting 64, the lid body 65, the adapter 66, and the drive mechanism 8, and the valve is formed by the housing 2, the work valve 4, and the valve introduction machine 6. The installation device is configured. At this time, the opening / closing shaft 12 of the butterfly valve 10 is inserted into the shaft portion 64c of the valve suspension fitting 64.

After that, the valve suspension fitting 64 and the butterfly valve 10 are slightly lifted upward by the drive mechanism 8, and the locking member 62 is retracted and pulled out from the window portion 61a of the cylindrical member 61. Although not shown, the window portion 61a is plugged so as to be closed in a sealed manner. At this time, it goes without saying that the lower end portion of the butterfly valve 10 is adjusted so as not to come into contact with the valve body 42.

Next, a step of installing the butterfly valve 10 at the cut portion of the fluid pipe 1 by the valve introducing machine 6 will be described. As shown in FIG. 21, the valve body 42 of the work valve 4 is retracted to open the branch portion 2a, and the grip member 82 described above grips the outer peripheral surface of the shaft member 81 on the rear end side. Then, by sliding the advancing / retreating member 83 toward the fluid pipe 1, the shaft member 81 and the butterfly valve 10 are advanced toward the fluid pipe 1.

The traveling movement of the shaft member 81 and the butterfly valve 10 is performed in a range from the gripping position of the gripping member 82 to the position close to the regulation member 84, and the shaft member 81 and the butterfly valve 10 are moved after the progressing movement is completed. , The movement is restricted by the regulating member 84. After that, another shaft member 81', 81' is connected to the upper end of the shaft member 81, and the butterfly valve 10 is arranged at the cut portion of the fluid pipe 1 by repeating the above steps. After arranging the butterfly valve 10 at the cut portion of the fluid pipe 1, the butterfly valve 10 is fixed to the housing 2 by a predetermined fixing means. At this time, another shaft member 81'is not always connected, and the arrangement may be completed by using the shaft member 81 having a predetermined length in advance.

In the state where the butterfly valve 10 is fixed to the housing 2, the packing S5 of the partition wall 11 is pressed against both inner side surfaces and the inner bottom surface of the housing 2, and the packing S6 of the upper lid portion 14 is pressed. Since pressure contact is performed over the inner peripheral surface of the branch portion 2a, the fluid flowing through the fluid pipe 1 is prevented from wrapping around between the partition wall 11 and the housing 2, and the fluid may leak from the branch portion 2a. Be prevented.

Next, as shown in FIG. 22, the fluid in the cylindrical member 61 and the mounting flange cylinder 63 is discharged to the outside, and is accessed from the work hole portion 61b of the cylindrical member 61 to access the mounting surface portion 64a of the valve suspension fitting 64 and the butterfly. The connection with the upper lid portion 14 of the valve 10 by bolts and nuts is released. Then, the shaft member 81 is regressed in the reverse procedure of the above step, and the valve suspension fitting 64 is pulled up inside the cylindrical member 61 and the mounting flange cylinder 63, so that the butterfly valve 10 is installed at the cut portion of the fluid pipe 1. The work is completed.

Although not particularly shown, first, the drive mechanism 8 is removed from the lid body 65, the lid body 65 and the valve suspension fitting 64 are removed from the mounting flange cylinder 63, the mounting flange cylinder 63 is removed from the cylindrical member 61, and the cylindrical member 61. Is removed from the work valve 4 to complete the removal work of the valve introduction machine 6. In this way, since each member constituting the valve introducing machine 6 can be separately transported by the crane, the load on the crane at the time of removing the valve introducing machine 6 can be reduced. After that, by removing the work valve 4 from the branch portion 2a of the housing 2, a series of operations up to cutting a predetermined portion of the fluid pipe 1 and installing the butterfly valve 10 at the cut portion are completed. Needless to say, a lid is attached to all windows and work holes in a sealed manner when cutting or introducing a valve in a continuous flow state.

Next, the working valve of the first modification will be described with reference to FIG. It should be noted that the description of the same configuration as that of the above embodiment and the overlapping configuration will be omitted.

As shown in FIG. 23, the work valve 400 in the first modification is arranged on both sides of the valve box 401 having a substantially tubular shape penetrating in the vertical direction and the fluid pipe 1 in the valve box 401 in the pipe axial direction. It is composed of valve bodies 402A and 402B, valve lids 403A and 403B for accommodating valve bodies 402A and 402B, and valve rods 404A and 404B for moving valve bodies 402A and 402B with respect to valve lids 403A and 403B.

The valve box 401 is provided with openings 401a and 401b facing the pipe axis direction of the fluid pipe 1, and a slide groove 401c is formed so as to communicate the openings 401a and 401b. The working valve 400 is configured by fixing the valve lids 403A and 403B to the valve box 401 in a sealed manner with the valve bodies 402A and 402B inserted into the openings 401a and 401b, respectively. By advancing the valve bodies 402A and 402B from both sides of the valve box 401, the tips of the valve bodies 402A and 402B come into contact with each other and the branch portion 2a of the housing 2 can be closed.

In this way, the valve bodies 402A and 402B, the valve lids 403A and 403B, and the valve rods 404A and 404B are divided into separate structures, and by installing these separately in order, the load on the crane used when installing the work valve 400 is reduced. can. Further, since the valve box 401 is provided with openings 401a and 401b on both sides facing each other, the valve bodies 402A and 402B, the valve lids 403A and 403B, and the valve rods 404A and 404B are attached to the openings 401a and 401b. The weight balance of the work valve 400 can be stabilized, and an unbalanced load can be suppressed from being applied to the connection point between the work valve 400 and the housing 2.

Next, the working valve of the second modification will be described with reference to FIG. As shown in FIG. 24, the working valve 410 is half-split with the first split body 412 in which the half-split member 411A (split body of the valve box), the valve body 402A, the valve lid 403A, and the valve rod 404A are unitized. The second divided body 413 in which the member 411B (divided body of the valve box), the valve body 402B, the valve lid 403B, and the valve rod 404B are unitized is provided, and the first divided body 412 and the second divided body 413 are housed. It may be configured by assembling on the branch portion 2a of the body 2. It should be noted that each member may be assembled at the branch portion 2a of the housing 2 to form the work valve 410. In this case, since the valve box is composed of a plurality of half-split members 411A and 411B, the load on the crane can be reduced.

Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions within the scope of the gist of the present invention are included in the present invention. Is done.

For example, in the above embodiment, the embodiment in which the butterfly valve 10 is used as the control fluid is illustrated, but the present invention is not limited to this, and the control fluid may be, for example, a sluice valve, a plug, a switching valve, or the like. For example, in the above embodiment, the embodiment in which the butterfly valve 10 is composed of a plurality of divided bodies is illustrated, but the present invention is not limited to this, and the control fluid may be integrally formed.

1 Fluid pipe 2 Housing 2a Branch (opening)
2b Flange (locking part)
4 Work valve 5 Cutting machine 6 Valve introduction machine 7 Jack (spacer)
8 Drive mechanism (drive unit, inserter)
10 Butterfly valve (control fluid)
11 Partition wall (main body)
12 Open / close shaft (main body)
13 Valve body (main body)
14 Upper lid (lid)
20 Housing 41 Valve box 41c Valve seat 42 Valve body 43 Valve lid 44 Valve rod 51 Mounting flange cylinder (cylindrical body)
52 Cutter 53 Lid 54 Adapter 55 Fixing jig (locking part)
61 Cylindrical member (cylindrical body)
62 Locking member (locking part)
63 Mounting flange cylinder (cylindrical body)
64 Valve hanging bracket 65 Lid 66 Adapter 81, 81'Shaft member (drive shaft)
86 Case part (case)
400 Working valve 401 Valve box 402 Working valve 402A, 402B Valve body 403 Working valve 403A, 403B Valve lid 404A, 404B Valve rod 410 Working valve 411A, 411B Half member 412 First split body 413 Second split body

Claims (4)

A housing that is hermetically attached to the fluid pipe, a work valve that is attached to the opening of the housing and can open and close the inside of the housing, and a work valve that is attached to the work valve and is attached to the inside of the housing. A cutting device having a cutter for cutting the cutter and a cutting machine having a driving unit for driving the cutter, and driving the cutter by the driving unit to cut the fluid pipe in the housing in a continuous flow state. It ’s an installation method,
The housing is hermetically attached to the fluid pipe, the work valve is attached to the housing, a cylindrical body capable of accommodating the cutter is installed in the work valve, and then the cutter is placed in the tubular body. Install and
A method for installing a cutting device, which comprises attaching the drive unit to the cutter installed in the cylindrical body. The possible lid holding the cutter, after fixing so as to close sealingly on the tubular body, to claim 1, characterized in that attaching the drive unit to the cutter held by the cover The method of installing the cutting device described. In a state where the casing to seal the outer diameter was spaced vertically from said lid of the driving shaft of the driving unit, after connection with the previous SL cutter and said drive shaft, sealingly the case to the lid The method for installing a cutting device according to claim 2, wherein the cutting device is connected. The cutting device according to claim 3 , wherein the cutter and the drive shaft are connected in a state where spacers are arranged above and below the case and the lid on the outer diameter side of the drive shaft. Installation method.

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