CN114635965B - Locking device and mechanical equipment - Google Patents

Abstract

A locking device and a mechanical apparatus are provided. The locking device includes: a base having a first through hole; a telescoping tube, a first end of the telescoping tube being sealingly connected with the base, the telescoping tube being configured to resiliently retract toward the base against the squeezing force; the end cover is arranged at the second end of the telescopic pipe and is provided with a second through hole aligned with the first through hole; and the positioning rod penetrates through the first through hole, the telescopic pipe and the second through hole, the upper part of the positioning rod is in sealing combination with the end cover and moves along with the positioning rod in the axial direction, and the lower part of the positioning rod penetrates through the first through hole of the base to move, so that gas entering from the first through hole is sealed in the telescopic pipe. The locking device can lock the transmission mechanism in the sealing cavity, and simultaneously, the medium in the sealing cavity is prevented from leaking to the outside.

Description

Locking devices and mechanical equipment

technical field

At least one embodiment of the present disclosure relates to a locking device, in particular to a locking device and a mechanical device suitable for locking a transmission mechanism in a closed environment containing toxic and harmful fluid media.

Background technique

In some nuclear power equipment, it is usually necessary to use a locking device to lock the transmission mechanism inside the closed environment containing toxic and harmful fluid media. However, there are harmful gases or liquids in the cavity of the transmission mechanism in some nuclear power equipment. , when using the locking device for locking, there are gaps in the locking device of the mechanical structure where the medium can flow and overflow.

Contents of the invention

An embodiment of the present disclosure provides a locking device, comprising:

The base has a first through hole;

a telescoping tube, the first end of the telescoping tube is sealingly connected to the base, and the contracting tube is configured to elastically shrink toward the base against an extrusion force;

an end cap mounted on the second end of the telescopic tube, the end cap having a second through hole aligned with the first through hole; and

The positioning rod runs through the above-mentioned first through hole, the above-mentioned telescopic tube and the above-mentioned second through hole, the upper part of the above-mentioned positioning rod is sealed with the above-mentioned end cover and moves axially with the above-mentioned positioning rod, and the lower part of the above-mentioned positioning rod passes through the above-mentioned base The first through hole moves, so that the gas entering through the first through hole is sealed in the shrink tube.

Another aspect of the present disclosure provides a mechanical device, comprising:

A housing, wherein a pressurized sealed environment is formed in the housing;

The transmission mechanism is installed in the above-mentioned sealed housing, and the above-mentioned transmission mechanism is provided with a second locking hole; and

As for the above-mentioned locking device, the base of the above-mentioned locking device is installed on the above-mentioned casing, and one end of the positioning rod of the above-mentioned locking device protruding from the above-mentioned base is operable to pass through the third through hole on the above-mentioned casing and insert into the above-mentioned The second locking hole is used to prevent the movement of the above-mentioned transmission mechanism.

Description of drawings

Other objects and advantages of the present disclosure will be apparent from the following description of the present disclosure with reference to the accompanying drawings, and can help a comprehensive understanding of the present disclosure.

FIG. 1 is a schematic cross-sectional view of a locking device according to an embodiment of the present disclosure;

2 is a schematic cross-sectional view of a locking device according to another embodiment of the present disclosure; and

3 is a schematic cross-sectional view of a mechanical device according to an embodiment of the disclosure.

In the above drawings, the meanings of reference signs are as follows:

100-base;

200-telescopic tube;

300-end cover;

400-positioning rod;

500-fixing ring;

600-limit device;

601-support frame;

602 - first bump;

603 - second protrusion;

604 - flange;

605-the first locking part;

606 - the second locking part;

607 - cooperate with the locking part;

700 - handle;

800-housing;

900-transmission mechanism;

1000-cover body;

1100 - Gasket.

It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the size of structures or regions may be enlarged or reduced, that is, the drawings are not drawn according to actual scale.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative effort fall within the protection scope of the present disclosure.

Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those of ordinary skill in the art. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items.

In this document, unless specifically stated otherwise, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to denote an orientation or position based on the drawings shown The relationship is only for the convenience of describing the present disclosure, and does not indicate or imply that the referred device, element or component must have a specific orientation, be constructed in a specific orientation, or operate. It should be understood that when the absolute positions of the described objects change, the relative positional relationship represented by them may also change accordingly. Therefore, these directional terms should not be construed as limiting the present disclosure.

In nuclear power equipment, there is usually toxic and harmful flow medium with a certain pressure inside the sealed cavity with transmission parts. The transmission mechanism, such as transmission gear, is installed in the cavity. After the transmission gear stops, it needs to be rotated at a specific angle. Perform mechanical locking. Since the movable mechanical locking mechanism needs to leave a certain gap, it is difficult for the conventional structure to ensure that the medium in the sealed cavity does not leak under a certain pressure.

In view of this, the embodiments of the present disclosure provide a locking device. The locking device may include sealing the medium passing through the positioning rod and the base in the closed space by using the telescopic tube, so as to prevent the medium in the sealed cavity from leaking to the outside.

FIG. 1 is a schematic cross-sectional view of a locking device according to an embodiment of the present disclosure.

According to an exemplary embodiment of the present disclosure, as shown in FIG. 1 , the locking device may include a base 100 , a telescopic tube 200 , an end cover 300 and a positioning rod 400 .

The base 100 has a first through hole. The first end of the telescoping tube 200 is sealingly connected with the base 100 , and the shrinking tube is configured to elastically shrink toward the base 100 against the extrusion force, so that the shrinking tube can be reset when the extrusion force disappears. The end cap 300 is mounted on the second end of the telescopic tube 200, and the end cap 300 has a second through hole aligned with the first through hole.

The positioning rod 400 runs through the first through hole, the telescopic tube 200 and the second through hole. The upper part of the positioning rod 400 is sealingly combined with the end cover 300 and moves axially with the positioning rod 400. The lower part of the positioning rod 400 passes through the first part of the base 100. The through-holes move such that fluid medium, such as gas, entering through the first through-hole is sealed within the shrink tube.

In the embodiment of the present disclosure, in the case that there is a medium such as gas or liquid in the sealed cavity, in order to prevent the medium in the sealed cavity from leaking to the outside of the locking device and at the same time realize the locking of the transmission mechanism, the locking device of the present disclosure can be used to The transmission mechanism in the sealed cavity is locked. For example, the transmission mechanism can be a transmission gear in the sealed cavity, and the rotation of the transmission gear can be restricted by the locking device.

In an embodiment of the present disclosure, the cross-sectional shapes of the shrink tube 200 and the base 100 may be circular, elliptical, square, or other polygonal shapes. The base 100 is used as the installation reference of the locking device, and can be welded and fixed with the casing of the mechanical equipment to realize the sealing function. The central hole needs to be matched after the welding of the base 100 and the shell is completed, and is used as the passing channel and radial positioning of the positioning rod 400 .

In the embodiment of the present disclosure, the positioning rod 400 may be a solid round rod, which is used as a latch to realize the locking function of the transmission mechanism. By pulling and pressing the positioning rod 400, the locking and releasing of the transmission mechanism are realized. The radial positioning of the positioning rod 400 is constrained by the coaxial through hole on the housing of the mechanical equipment, and its axial tension and compression stroke is determined by the telescopic stroke of the telescopic tube 200 at its lower part. When locking, the end of the positioning rod 400 is inserted into the pin hole of the transmission mechanism of the mechanical equipment, and when disengaged, the end of the positioning rod 400 is retracted into the housing.

In the embodiment of the present disclosure, the telescopic tube 200 can be compressed under the condition of extrusion force, and the telescopic tube 200 can return to the original shape under the action of elastic stretching force when the extrusion force disappears.

In the embodiment of the present disclosure, the connection method between the locking device and the external housing includes but not limited to welding and screw connection. In the case of screw connection, a gasket may be provided between the base 100 and the installation plane.

In the embodiment of the present disclosure, the telescopic tube 200 can be welded to the base 100 and the end cover 300 respectively, and the end cover 300 and the positioning rod 400 can also be welded to ensure that a closed space is formed in the locking device.

In the embodiment of the present disclosure, when the transmission mechanism needs to be locked after the installation is completed, the positioning rod 400 can be inserted into the transmission mechanism by moving the positioning rod 400 , so as to realize the locking of the transmission mechanism by the positioning rod 400 . Simultaneously, owing to adopting telescopic telescopic tube 200 to be connected with base 100, end cover 300 respectively, end cover 300 is fixed with positioning rod 400, so that under the situation of moving positioning rod 400, positioning rod 400 does not produce relative to end cover 300. Move, so as to ensure that a closed space is formed in the telescopic tube 200, thereby ensuring that the medium in the sealed cavity will not leak during the locking process.

In the embodiment of the present disclosure, through the connection of the telescopic tube 200, the end cap 300 and the positioning rod 400, when in use, the positioning rod 400 can be inserted into the locked object (such as the transmission mechanism of mechanical equipment) through the expansion and contraction of the telescopic tube 200 Inside, because the end cap 300 is connected with the positioning rod 400, the gas in the sealed chamber can only leak into the telescopic tube 200, but cannot leak into the external environment, thereby ensuring the sealing performance of the sealed chamber.

In an embodiment of the present disclosure, the telescopic tube 200 may include an elastic bellows, and the end cover 300 may include a flange cover.

In the embodiment of the present disclosure, the elastic bellows can adopt a single axial type expansion joint, and the positioning rod 400 can be inserted into the locked position by lightly pressing the bellows, and the positioning rod 400 can be kept separated from the transmission mechanism in its free state state, avoiding the interference between the positioning rod 400 and the transmission mechanism. At the same time, because the bellows is a flexible part, the requirements for the overall installation and positioning of the locking device are relatively low, and the on-site operation is convenient.

In the embodiment of the present disclosure, the flange cover is an annular plate, which is connected to the positioning rod 400 and the base 100 respectively as a part of the sealing boundary, and the joint is welded to realize the sealing function. The sealing boundary of the device is welded, which can ensure the sealing effect stably for a long time and has a long service life.

In the embodiment of the present disclosure, the telescopic tube 200 is welded to the end cover 300 and the base 100 respectively, and the base 100 is welded on the installation plane.

Fig. 2 is a schematic cross-sectional view of a locking device according to another embodiment of the present disclosure.

As shown in FIG. 2 , the locking device may further include a fixing ring 500 . The fixing ring 500 is disposed on the base 100 , and the first end of the telescopic tube 200 is connected to the base 100 through the fixing ring 500 .

In the embodiment of the present disclosure, in order to prevent the connection between the telescopic tube 200 and the base 100 from being unstable, thereby causing the medium in the sealed cavity to overflow from the gap between the base 100 and the telescopic tube 200, a fixing ring 500 can be used to target sexual connection.

In an embodiment of the present disclosure, the second end of the telescopic tube 200 may also be connected to the end cap 300 through a fixing ring 500 .

In the embodiment of the present disclosure, the fixing ring 500 may be a circular ring, which may be fixedly connected with other components by welding to realize the sealing function. Setting the fixing ring 500 can reduce the welding deformation of the telescopic tube 200, and at the same time, it can be used as an adjustment link of the device during the assembly stage.

In an alternative embodiment of the present disclosure, the locking device may further include an elastic component, which is sheathed on the positioning rod 400 in the shrink tube, and the two ends of the elastic component elastically abut against between the end cap 300 and the base .

In the embodiment of the present disclosure, when the extrusion force acting on the telescopic tube 200 disappears, the telescopic tube 200 cannot recover its original shape within the range of its own stretchability. By setting elastic components in the telescopic tube 200, for example The spring helps the telescopic tube 200 to restore its original shape.

As shown in FIG. 2 , the above-mentioned locking device may further include a limiting device 600 . The limiting device 600 is disposed on the outside of the base 100, and the limiting device 600 is configured to limit the axial movement range of the positioning rod 400.

In the embodiment of the present disclosure, in order to ensure that the position of the positioning rod 400 changes in the locked state or the unlocked state to affect the operation of the transmission mechanism, a limiting device 600 may be provided to fix the position of the positioning rod 400 .

In the embodiment of the present disclosure, when locking or unlocking is required, after the positioning rod 400 is inserted into the transmission mechanism or pulled out from the transmission mechanism, the axial movement range of the positioning rod 400 is fixed by the limiting device 600 , to prevent the positioning rod 400 from breaking away from or inserting into the transmission mechanism to cause a change in the working state of the transmission mechanism.

As shown in FIG. 2 , the limiting device 600 may include a support frame 601 . The support frame 601 is arranged on the outside of the base 100. The support frame 601 has a first protrusion 602 and a second protrusion 603 extending toward the positioning bar 400. The first protrusion 602 is farther away from the base than the second protrusion 603. The cover 300 is provided with a radially outward protruding flange 604, and the flange 604 extends between the first protrusion 602 and the second protrusion 603, so as to limit the position of the end cover 300 between the first protrusion 602 and the second protrusion. 603 to move between.

In the embodiment of the present disclosure, in order to avoid damage to the telescopic tube 200 when the displacement stroke of the positioning rod 400 is large, a first protrusion 602 and a second protrusion 603 can be provided on the limit device 600 so that the end The cover 300 moves between the first protrusion 602 and the second protrusion 603, so that when the positioning rod 400 is moved, the two protrusions limit the moving position of the end cover 300, thereby avoiding excessive pull-out of the positioning rod 400 to the telescopic Tube 200 is damaged.

In the embodiment of the present disclosure, a first locking portion 605 and a second locking portion 606 are provided at the position where the positioning rod 400 protrudes from the end cover 300 , and the supporting frame 601 is provided with the first locking portion 605 and the second locking portion 606 The matching locking part 607 is matched with the first locking part 605 or the second locking part 606 to lock the positioning rod 400 at the first locking position or the second locking position.

In the embodiment of the present disclosure, each of the first locking portion 605 and the second locking portion 606 includes a locking protrusion extending radially outward from the positioning rod 400 , and the locking protrusion is provided with a first locking hole. The mating locking part 607 includes a plug-in part, and the plug-in part is operably (ie, operated) inserted into the first locking hole of the first locking part 605 or the second locking part 606 to lock the positioning rod 400 in the first locking position or second locked position.

In an embodiment of the present disclosure, the insertion part is screwed into the first locking hole.

In the embodiment of the present disclosure, when using the limiting device 600, after inserting the positioning rod 400 into the transmission mechanism, the first locking part 605 or The locking projections on the second locking portion 606 are combined to fix the position of the positioning rod 400 , making it difficult to change the relative positional relationship between the transmission mechanism and the positioning rod 400 . Wherein, operably inserting may refer to completing the inserting under the condition of operation, for example, completing the combination of the locking protrusion and the insertion part by screwing.

As shown in FIG. 2 , the locking device may further include a handle 700 . The handle 700 is disposed on an end of the positioning rod 400 away from the base 100 .

In the embodiment of the present disclosure, in order to facilitate the operation of the positioning rod 400 , a handle 700 may be provided to facilitate the staff to move the positioning rod 400 . The handle 700 can be in the shape of a door or a spherical shape, and the specific form of the handle 700 can be set according to requirements.

3 is a schematic cross-sectional view of a mechanical device according to an embodiment of the disclosure.

As shown in FIG. 3 , the mechanical device may include a housing, a transmission mechanism 900 and a locking device. For example, mechanical equipment may include nuclear power equipment.

A pressurized sealed environment is formed inside the housing. The transmission mechanism 900 is installed in the sealed housing, and the transmission mechanism 900 is provided with a second locking hole. The base of the locking device is installed on the housing, and one end of the positioning rod 400 of the locking device protruding from the base is operatively inserted into the second locking hole through the third through hole on the housing to prevent the movement of the transmission mechanism 900 . The transmission mechanism 900 includes transmission gears.

In an embodiment of the present disclosure, the internal cavity of the mechanical device may have a certain pressure, for example, the pressure may be 0.1 MPa.

In the embodiment of the present disclosure, the transmission mechanism 900 can run in the inner cavity, and when the transmission mechanism 900 needs to be locked, the positioning rod 400 can be operated to insert it into the second locking hole of the transmission mechanism 900, thereby realizing Locking of transmission mechanism 900 .

As shown in FIG. 3 , the mechanical equipment may further include a cover 1000 .

The cover body 1000 is detachably mounted on the housing or the base 100 , and the base 100 , the telescopic tube 200 , the end cap 300 and the positioning rod 400 are all located in the cover body 1000 .

In the embodiment of the present disclosure, the cover body 1000 can be a closed shell, which is screwed to the installation plane or the base 100 , and it does not undertake the sealing function, and is only used for dust-proofing the outside of the device.

In the embodiment of the present disclosure, since there is dust or water vapor in the working environment of the locking device, in order to prevent dust or water vapor from affecting the life and cleanliness of the locking device, a cover 1000 may be provided outside the locking device.

In the embodiment of the present disclosure, the cover body 1000 can be installed on the installation plane or the base 100 in a screwed manner.

As shown in FIG. 3 , the locking device may further include a gasket 1100 .

The gasket 1100 is disposed between the cover body 1000 and the installation plane or the base 100 , and the gasket 1100 is used to enhance the buffer shape or sealing performance between the gasket 1100 and the installation plane or the base 100 .

In the embodiment of the present disclosure, in order to avoid the overflow of the medium in the sealed cavity, a sealing gasket 1100 can be provided between the cover 1000 and the installation plane or the base 100, even if part of the medium leaks into the cover 1000, it will not further Leakage into the external environment indirectly strengthens the sealing performance of the sealed cavity. At the same time, the gasket 1100 can also play a buffer role. When the cover 1000 is subjected to external shocks, the cushion 1100 can properly reduce the impact force between the cover 1000 and the installation plane or the base 100, and reduce the impact of the cover 1000. chance of damage.

Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can improve them, and the structures described in various embodiments do not conflict with each other in terms of structure or principle Can be combined freely.

Although some embodiments according to the general technical concept of the present disclosure have been shown and described, those skilled in the art will understand that changes can be made to these embodiments without departing from the principle and spirit of the general technical concept of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims (14)

1. A locking device, characterized in that it comprises: The base has a first through hole; a telescopic tube, the first end of the telescopic tube is sealingly connected to the base, and the telescopic tube is configured to elastically shrink toward the base against an extrusion force; an end cap mounted on the second end of the telescoping tube, the end cap having a second through hole aligned with the first through hole; and The positioning rod runs through the first through hole, the telescopic tube and the second through hole, the upper part of the positioning rod is sealed with the end cover and moves axially with the positioning rod, and the positioning rod The lower part of the lower part moves through the first through hole of the base, so that the medium entering from the first through hole is sealed in the telescopic tube. 2. The locking device of claim 1, wherein the telescoping tube comprises an elastic bellows. 3. The locking device according to claim 2, further comprising: A fixing ring is arranged on the base, and the first end of the telescopic tube is connected to the base through the fixing ring. 4. The locking device according to claim 1, further comprising: an elastic member sleeved on the positioning rod in the telescopic tube, and the two ends of the elastic member elastically abut against the between the end cap and the base. 5. The locking device according to any one of claims 1-4, further comprising: A limiting device is arranged on the outside of the base, and the limiting device is configured to limit the axial movement range of the positioning rod. 6. The locking device according to claim 5, wherein the limiting device comprises: The support frame is arranged on the outside of the base, the support frame has a first protrusion and a second protrusion extending toward the positioning rod, and the first protrusion is farther away from the second protrusion than the second protrusion. the base, A radially outwardly protruding flange is provided on the end cover, and the flange extends between the first protrusion and the second protrusion to limit the position of the end cover between the first protrusion and the second protrusion. Move between the second bumps. 7. The locking device according to claim 6, wherein a first locking part and a second locking part are provided at the position where the positioning rod protrudes from the end cover, and the supporting frame is provided with a A cooperating locking part where the first locking part and the second locking part cooperate, and the cooperating locking part is combined with the first locking part or the second locking part to lock the positioning lever in the first locking position or the second locking position Location. 8. The locking device according to claim 7, wherein each of the first locking portion and the second locking portion comprises: a locking protrusion extending radially outward from the positioning rod, the The locking protrusion is provided with a first locking hole; The mating locking part includes an inserting part, and the inserting part is operatively inserted into the first locking hole of the first locking part or the second locking part to lock the positioning rod in the first locking hole. position or the second locked position. 9. The locking device according to claim 8, characterized in that, the insertion part is screwed into the first locking hole. 10. The locking device according to any one of claims 1-3, further comprising: a handle disposed at an end of the positioning rod away from the base. 11. A mechanical device, characterized in that it comprises: a housing, wherein a pressurized sealed environment is formed in the housing; The transmission mechanism is installed in the housing, and the transmission mechanism is provided with a second locking hole; and According to the locking device according to any one of claims 1-10, the base of the locking device is installed on the housing, and one end of the positioning rod of the locking device protruding from the base is operatively inserted through the Insert the second locking hole through the third through hole on the housing to prevent the transmission mechanism from moving. 12. The mechanical device of claim 11, further comprising: The cover is detachably mounted on the housing or the base, and the base, the telescopic tube of the locking device, the end cover and the positioning rod are all located in the cover. 13. The mechanical device of claim 12, further comprising: The gasket is arranged between the cover body and the casing or the base. 14. The mechanical apparatus of claim 11, wherein the transmission mechanism comprises a transmission gear.

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