JPH0791578A - Flange mounting jig - Google Patents

Abstract

(57) [Summary] [Purpose] It can be applied to conventional vacuum flanges and metal gaskets as it is, and the metal gaskets and vacuum flanges can be accurately positioned and held, and even a heavy vacuum flange can be assembled by one person. Provide a flange mounting jig that can be easily performed with. A hollow cylindrical ring 12 whose inner surface is fitted to the outer periphery of a fixed flange 2 having a circular outer shape and which is locked to the fixed flange, and a locking position L which projects inward from the inner surface of the ring. And a flange locking means 14 pivotally attached to the ring so as to be swingable between the open position F and the open position F that does not project.
The distance L between the mounting surface of the fixed flange locked to the ring and the flange locking means is determined by the thickness of another mounting flange 3 having a circular outer shape connected to the fixed flange and the metal gasket 1 sandwiched between the flanges. Is almost equal to the sum of

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange mounting jig, and more particularly to a vacuum flange and metal gasket mounting jig.

[0002]

2. ^{Description of the} Related Art In a vacuum device having an internal pressure of 10 ^-8 to 10 ^-10 Pa, which reaches a so-called ultra-vacuum, vacuum flanges 2 and 3 and a metal gasket 1 as shown in FIG. 7 are usually used.
The metal gasket 1 is a thin hollow plate of about 2 mm made of a relatively soft metal such as copper, and the edges 4 provided on the vacuum flanges 2 and 3 bite into both sides of the metal gasket 1 to make it airtight without using vacuum grease or the like. Is designed to hold. Further, two leak grooves 5 each having a width and a depth of about 1.5 mm are normally provided in the diametrical direction on the mating surfaces of the vacuum flanges 2 and 3, and the flanges that are connected and closely adhered by the leak grooves 5 A gas passage extending from the outside of the flange is formed in the metal gasket 1 so that the leakage of the flange can be detected by a helium detector or the like.
The vacuum flanges 2 and 3 are provided with a plurality of bolt holes, and the bolts 6 and the nuts 7 are screwed into each other by the bolt holes so that 2
It is possible to firmly connect the flanges.

[0003]

In the conventional vacuum flange described above, the vacuum flange 2 fixed to the vacuum device (hereinafter referred to as a fixed flange) and another vacuum flange 3 (hereinafter referred to as a mounting flange) are connected. In doing so, there was a problem that the assembly work was difficult for one person. That is,
Since the fixed flange 2 fixed to the vacuum device is provided in various orientations such as horizontal, vertical, and diagonal, when connecting another mounting flange 3, the metal gasket 1 is accurately centered on the fixed flange 2. There was a problem that was difficult to hold. Further, when a device such as a valve is connected to the mounting flange 3 by welding or the like, the weight may reach 10 to 20 kg or more. In this case, the mounting flange 3 is pressed with one hand and the bolt 6 and the nut 7 are pressed. Since it had to be attached, workability was extremely poor, and there was a problem that it was practically impossible to assemble it alone.

In order to solve the above-mentioned problems, a gasket clip utilizing the leak groove 5 of the fixing flange 2 has been conventionally known. However, with such a gasket clip, although the metal gasket 1 can be held, the mounting flange 3 cannot be held, and the above-mentioned problems cannot be solved. In addition, in order to improve the vacuum flange itself, Japanese Utility Model Laid-Open Nos. 62-174167 and 63-24.
Nos. 482 and 63-152988, etc. have already been filed, but these have different purposes.
It did not even suggest the problems mentioned above. For example, in the invention of Japanese Utility Model Laid-Open No. 63-24482, since the gasket is fitted only slightly on the flange, it easily comes off and falls, and when the one having the mounting side flange (mounting flange) is a heavy object, When doing the assembly work by one person, when supporting it with both hands and connecting it with the fixing flange (after properly installing the gasket), since both hands are blocked, it is not possible to install the tightening bolts and nuts, I had to get the help of another person. Further, such a vacuum flange requires a large change in the structure of the vacuum flange itself, and there is a problem that it cannot be applied to the conventional vacuum flanges 2 and 3 as it is.

The present invention was devised to solve the above-mentioned various problems. That is, the object of the present invention can be directly applied to the conventional vacuum flange and the metal gasket, the metal gasket and the vacuum flange can be accurately positioned and held, and even a heavy vacuum flange can be assembled by itself. It is to provide a flange mounting jig that can be easily performed.

[0006]

According to the present invention, there is provided a hollow cylindrical ring, the inner surface of which is fitted to the outer periphery of a fixed flange having a circular outer shape, and which is locked to the fixed flange.
A flange locking device pivotally attached to the ring so as to be swingable between a locking position projecting inward from the inner surface of the ring and an open position not projecting from the inner surface of the ring; The distance between the mounting surface and the flange locking device is approximately equal to the sum of the thicknesses of another mounting flange having a circular outer shape connected to the fixed flange and a metal gasket sandwiched between the flanges. A flange mounting jig is provided.

According to a preferred embodiment of the present invention, the fixing flange and the mounting flange have substantially the same outer diameter and radial penetrating elongated leak grooves, and the ring is engaged. The fixing flange has a plurality of rectangular through holes at positions aligned with the leak grooves of the fixed flange, and further includes a gasket locking device for locking the metal gasket through the through holes, the gasket locking device engaging the ring. It comprises a terminal part to be stopped, an intermediate part extending inward from the terminal part to fit in the leak groove, and a tip part for locking the metal gasket.

Further, the ring has a protrusion projecting inward in the radial direction at the end opposite to the flange locking device, and the ring is divided in half. Is preferred. Further, a leaf spring biased in the axial direction is attached to the end of the gasket locking device, so that the gasket locking device is fitted and locked in the rectangular through hole of the ring. There is. Further, the tip of the gasket locking device is pointed obliquely, and the end has projections on both sides in the axial direction, and is further attached axially inward on both axial sides of the rectangular through hole of the ring. It is preferable that the spring has a pair of biased leaf springs, and the leaf springs are fitted to the protrusions to lock the gasket locking device. Further, it is preferable that the tip end portion of the gasket locking device further has a protrusion at its tip, and the metal gasket is provided with a recessed hole into which the protrusion is fitted.

[0009]

According to the above-mentioned structure of the present invention, a hollow cylindrical ring having an inner surface fitted to the outer periphery of the fixed flange and locked to the fixed flange, and a member projecting inward from the inner surface of the ring. Since there is provided a flange locking device pivotally attached to the ring so as to be swingable between a stop position and an open position that does not project, the ring is fixed to the fixed flange by fitting the inner surface of one end of the ring to the outer circumference of the fixed flange. Position the mounting flange on the fixed flange by locking it, then fitting another mounting flange to the inner surface of the ring with a metal gasket sandwiched, and swinging the flange locking device from the open position to the locking position. The hands can be separated from the flange and the assembly work can be performed with both hands. Also, the distance between the mounting surface of the fixed flange locked to the ring and the flange locking device is almost equal to the sum of the thickness of the mounting flange and the metal gasket. -Two flanges can be firmly connected by screwing nuts.

Further, the fixing flange and the mounting flange are
Having an approximately same outer diameter and having an elongated leak groove penetrating in the radial direction, and the ring having a plurality of rectangular through holes at positions aligned with the leak grooves of the fixed flange, and
Since it is equipped with a gasket locking device that locks the metal gasket through this through hole, during flange connection work,
The metal gasket can be securely locked at the tip of the gasket locking device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In addition, in each figure, the common portions are denoted by the same reference numerals and used. FIG. 1 is an overall cross-sectional view (A) of a flange mounting jig of the present invention and a bottom view (B) thereof. Note that in (B), the lower flange is omitted for clarity. In this figure, a flange mounting jig 10 of the present invention comprises a hollow cylindrical ring 12 whose inner surface is fitted to the outer periphery of a fixed flange 2 having a circular outer shape, and which is locked to the fixed flange 2. 12
2 is provided with a flange retainer pivotally attached to the ring 12, that is, a flange locking device 14, so as to be swingable between a locking position L that projects inward from the inner surface of the ring and an open position F that does not project. In addition, in this figure, the distance L between the mounting surface of the fixed flange 2 locked to the ring 12 and the flange locking device 14 is the distance between another mounting flange 3 having a circular outer shape connected to the fixed flange 2 and the distance between the flanges. It is almost equal to the sum of the thicknesses of the metal gasket 1 sandwiched between. With such a configuration, the inner surface (upper part in the figure) of one end of the ring 12 is fitted to the outer periphery of the fixed flange 2 to lock the ring 12 on the fixed flange 2, and then the metal gasket 1 is sandwiched to attach another mounting flange 3 to the ring 12. The mounting flange 3 can be positioned and held on the fixed flange 2 by fitting it on the inner surface of the flange locking device 14 and swinging the flange locking device 14 from the open position F to the locking position L. Assembly work can be performed with both hands separated. Further, since the distance L between the mounting surface of the fixed flange 2 locked to the ring 12 and the flange locking device 14 is substantially equal to the sum of the thicknesses of the mounting flange 3 and the metal gasket 1, the flanges 2, 3 in this state. It is possible to firmly connect the two flanges by inserting the bolt 6 into the bolt hole and screwing the bolt 6 and the nut 7 together.

The inner diameter of the ring 12 is substantially the same as the outer diameter of the flange. Further, the inner diameter of the portion facing the flange 3 is 0.3 to 0.5 mm as compared with the portion facing the flange 2.
It is preferably large to facilitate insertion of the flange 3. Further, it is preferable that the inner surface of the ring 12 is coated with Teflon so that the flange 3 slides smoothly.

The fixed flange 2 and the mounting flange 3 are vacuum flanges for a vacuum device in which the internal pressure reaches a so-called ultra-vacuum of 10 ^-8 to 10 ^-10 Pa, and have substantially the same outer diameter and penetrate each other in the radial direction. It has a matching elongated leak groove 5 (see FIG. 7). Further, in FIG. 1, the ring 12
Has a plurality of rectangular through holes 13 at positions aligned with the leak grooves 5 of the fixed flange 2 that is locked. Further, the flange mounting jig 10 of the present invention includes a gasket retainer for locking the metal gasket 1 through the through hole 13, that is, a gasket locking device 16. This gasket locking device 16
As shown in (B), the metal gasket 1 is engaged with the end portion 17 that is locked to the ring 12, the intermediate portion 18 that extends inward from the end portion 17 and is fitted into the leak groove 5, and the metal gasket 1. It consists of the tip part 19 which stops. With such a configuration, the metal gasket 1 can be reliably locked by the tip portion 19 of the gasket locking device 16 during the flange connecting operation.

In FIG. 1, the ring 12 further has a protrusion 12a protruding inward in the radial direction at the end (upper end in the figure) opposite to the flange locking device 14. Further, the ring 12 is divided in half, and the hinge 20 and the fastener 21 are provided.
It can be opened and closed with (zippers). With this configuration, the ring 12 can be easily attached from the side of the flange even if a large device (for example, a valve) is connected to the vacuum flanges 2 and 3.

FIG. 2 is a side sectional view similar to FIG. 1A showing another embodiment of the flange mounting jig of the present invention, showing only one side of the axis of symmetry. The ring 12 of FIG. 2 differs from the ring 12 of FIG. 1 in that it has no protrusion 12a. Also,
Although not shown, the ring 12 of FIG. 2 is the ring 12 of FIG.
Unlike, it is one and is not divided in half. Further, a female screw penetrating in the radial direction is provided on the upper portion (in the drawing) of the ring 12, and a thumb screw 22 is screwed to this female screw. With such a configuration, when a device having a diameter larger than the flange diameter is not attached to either or both of the vacuum flanges 2 and 3, the attachment flange 3 is positioned and held on the fixed flange 2 with a simpler configuration. Both hands can be separated from the flange and the assembly work can be done with both hands.

FIG. 3 is an overall perspective view of the gasket locking device 16 in FIGS. 1 and 2. As described above, the gasket locking device 16 includes the end portion 1 locked to the ring 12.
7, a middle portion 18 extending inward from the end portion 17 to fit in the leak groove 5, and a tip portion 19 for locking the metal gasket 1. Further, in FIG. 3, the intermediate portion 1
The width and height of 8 are set to fit in the two aligned leak grooves 5 of the two flanges 2 and 3. Further, the tip portion 19 locks the metal gasket 1 and does not become higher than the height of the two leak grooves 5 at its lower end (in the figure).
Only the protrusions. Further, a leaf spring 23 which is axially biased is attached to the end portion 17 of the gasket locking device 16. Thereby, the gasket locking device 16
Fits in the rectangular through hole 5 of the ring 12 to lock the gasket locking device 16 to the ring 12, and the metal gasket 1 can be reliably locked at the tip portion 19 during the flange connecting operation.

FIG. 4 is a side sectional view similar to FIG. 2, showing another embodiment of the flange mounting jig of the present invention, and FIG.
FIG. 5 is an overall perspective view of the gasket locking device 16 in FIG. 4. The gasket locking device 16 shown in FIGS. 4 and 5 is also shown in FIG.
Similarly, the end portion 17 that is locked to the ring 12, the intermediate portion 18 that extends inwardly from the end portion 17 and fits into the leak groove 5, and the tip portion 19 that locks the metal gasket 1.
Consists of. However, in FIG. 5, the width and height of the intermediate portion 18 are set so as to fit only in the leak groove 5 on the flange 2 side. Further, the tip portion 19 of the gasket locking device 16 is obliquely pointed. Furthermore, the end portion 17 has a protrusion 17a on both axial surfaces. Further, as shown in FIG. 4, a pair of leaf springs 25 axially urged inward are provided on both sides of the rectangular through hole of the ring 12 in the axial direction. With this configuration, as shown in FIG. 4, the leaf spring 25 fits into the protrusion 17a to lock the gasket locking device 16 and the tip 1
9 contacts the side surface of the metal gasket 1 and locks the metal gasket 1. With this configuration,
As in the example of FIG. 1 and FIG. 2, the gasket locking device 1 is provided without aligning the leak grooves 5 of the two flanges 2 and 3.
6 is fitted in the rectangular through hole 5 of the ring 12, the gasket locking device 16 is locked to the ring 12, and the metal gasket 1 can be reliably locked at the tip portion 19 thereof during the flange connecting work.

FIG. 6 shows another embodiment of the tip portion 19 of the gasket locking device 16 shown in FIG. In this figure, the tip portion 19 of the gasket locking device 16 has a protrusion 19a at its tip. Further, the metal gasket 1 is provided with a recessed hole 1a into which the protrusion 19a of the tip portion 19 is fitted. With this configuration, the locking of the metal gasket 1 by the tip portion 19 can be further ensured.

As described above, according to the present invention, the inner surface of one end of the ring 12 is fitted to the outer periphery of the fixed flange 2 to lock the ring 12 to the fixed flange 2, and then the metal gasket 1 is sandwiched for another mounting. By fitting the flange 3 on the inner surface of the ring 12 and swinging the flange locking device 14 from the open position F to the locking position L, the mounting flange 3 can be positioned and held on the fixed flange 2 and both hands can be held. Assembly work can be done with both hands apart from the flange. Further, in this state, the bolt 6 can be passed through the bolt hole of the flange, and the two flanges can be firmly connected by screwing the bolt and nut. Further, the metal gasket 1 is locked by the gasket locking device 16 through the rectangular through hole aligned with the leak groove 5 of the flange, so that the metal gasket 1 can be reliably locked during the flange connecting work.

[0020]

Therefore, the flange mounting jig of the present invention is
It can be applied to conventional vacuum flanges and metal gaskets as it is, can accurately position and hold metal gaskets and vacuum flanges, and even a heavy vacuum flange can be easily assembled by one person, etc. Has the excellent effect of.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a flange mounting jig of the present invention (A).
And a bottom view (B) thereof.

FIG. 2 is a side sectional view similar to FIG. 1A showing another embodiment of the flange mounting jig of the present invention.

3 is an overall perspective view of the gasket locking device in FIGS. 1 and 2. FIG.

FIG. 4 is a side sectional view similar to FIG. 2, showing another embodiment of the flange mounting jig of the present invention.

5 is an overall perspective view of the gasket locking device in FIG.

6 is another embodiment of the tip of the gasket locking device of FIG.

FIG. 7 is a configuration diagram of a conventional vacuum flange and a metal gasket.

[Explanation of symbols]

 1 Metal Gasket 2 Fixed Flange 3 Mounting Flange 4 Edge 5 Leakage Groove 6 Bolt 7 Nut 10 Flange Mounting Jig 12 Ring 12a Projection 13 Through Hole 14 Flange Locking Device (Flange Presser) 16 Gasket Locking Device (Gasket Presser) 17 Terminal part 17a Projection part 18 Intermediate part 19 Tip part 19a Projection 20 Hinge 21 Fastener 22 Thumbscrew 23, 25 Leaf spring

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area F16L 23/16

Claims (6)

[Claims] 1. A hollow-cylindrical ring, the inner surface of which is fitted to the outer circumference of a fixing flange having a circular outer shape, and which is locked to the fixing flange, and a locking member which projects inward from the inner surface of the ring. A flange locking device pivotally attached to the ring so as to be swingable between a position and an open position that does not project, and the distance between the mounting surface of the fixed flange locked to the ring and the flange locking device is A flange mounting jig, wherein the outer shape connected to the fixed flange is approximately equal to the sum of the thicknesses of another mounting flange having a circular shape and a metal gasket sandwiched between the flanges. 2. The fixing flange and the mounting flange are
It has substantially the same outer diameter and elongated leak grooves that penetrate each other in the radial direction, and the ring has a plurality of rectangular through holes at positions that match the leak grooves of the fixed flanges that are locked, Furthermore, a gasket locking device for locking the metal gasket through the through hole is provided, and the gasket locking device extends so as to fit in the leak groove and an end portion locked to the ring. The flange mounting jig according to claim 1, characterized in that the flange mounting jig comprises an intermediate portion and a tip portion for locking the metal gasket. 3. The ring has a protrusion projecting inward in the radial direction at the end opposite to the flange locking device, and the ring is divided in half.
The flange mounting jig according to claim 1, wherein 4. The distal end of the gasket locking device comprises:
A leaf spring biased in the axial direction is attached so that the gasket locking device is fitted and locked in the rectangular through hole of the ring. Flange mounting jig. 5. A distal end portion of the gasket locking device is obliquely pointed, and a distal end portion of the gasket locking device has projections on both sides in the axial direction. The flange according to claim 2, further comprising a pair of leaf springs biased toward each other, the leaf springs being fitted to the protrusions to lock the gasket locking device. Mounting jig. 6. The distal end portion of the gasket locking device further has a projection at the distal end thereof, and the metal gasket is provided with a recess hole into which the projection is fitted. The flange mounting jig described in 5.