Disassembling and assembling device for flange end cover of stop valve

Abstract

The utility model relates to the technical field of nuclear power valve maintenance, in particular to a dismounting device for a flange end cover of a stop valve. The flange end cover is connected with the valve yoke frame, one end of the support can be inserted into the stop valve and can be arranged on a valve body on the edge of the flange end cover in a sleeved mode, the other end of the support is connected with the base, the base is provided with a limiting groove, one end of the fixing piece is rotationally arranged in the limiting groove, and the other end of the fixing piece is arranged on the periphery of the valve yoke frame in a sleeved mode. The driving piece is configured to drive the fixing piece to rotate so that the valve yoke frame and the flange end cover can rotate relative to the valve body and can be screwed out of the valve body. By using the device, the driving piece can transmit torsional force to the valve yoke frame through the fixing piece, meanwhile, the fixing piece rotates in the limiting groove, and torque offset can be prevented; and compared with manual operation, the torque is easier to control, overlarge torque is avoided, thread seizure can be prevented, the stop valve is prevented from being damaged, and the flange end cover can be smoothly screwed out.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power valve maintenance, in particular to a disassembly and assembly device for a stop valve flange end cover. Background Art

[0002] At present, the flange end cover of the PV02 / PV32 stop valve in power plants is a threaded connection structure, which is widely used in nuclear power and usually serves as an isolation valve for system pipeline media. The valve model is a 1-inch Y-type manual bellows stop valve. The threaded connection can prevent dust and is easy to disassemble.

[0003] However, during the maintenance process, the flange end cover is usually removed manually using wrenches such as pipe pliers. Due to manual operation, the torque is insufficient to remove the flange end cover. Therefore, workers often use violence to remove it, which can easily lead to excessive torque or torque deviation, causing the thread to be stuck, resulting in the flange end cover being unable to be removed, the stop valve being unable to be repaired, and even damage to the stop valve, posing a safety hazard to the operation of the nuclear power plant.

[0004] Therefore, there is an urgent need for a disassembly and assembly device for the flange end cover of a stop valve to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a disassembly and assembly device for a stop valve flange end cover, which can smoothly disassemble the flange end cover, avoid thread seizure, and prevent the stop valve from being damaged.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A device for disassembling and assembling a flange end cover of a stop valve, wherein the flange end cover is connected to a valve yoke and is characterized in that it comprises: a bracket, a base, a fixing member and a driving member, one end of the bracket can be inserted into the interior of the stop valve and can be sleeved on the valve body at the edge of the flange end cover, the other end of the bracket is connected to the base, the base is provided with a limiting groove, one end of the fixing member is rotatably set in the limiting groove, and the other end of the fixing member is sleeved on the outer periphery of the valve yoke, and the driving member is configured to drive the fixing member to rotate so that the valve yoke and the flange end cover can rotate relative to the valve body and be screwed out of the valve body.

[0008] As an optimal technical solution for the above-mentioned device for disassembling and assembling the flange end cover of a stop valve, the device for disassembling and assembling the flange end cover of a stop valve also includes a rotating part, one end of the rotating part is rotatably arranged in the limiting groove, and the other end of the rotating part is connected to the fixing part.

[0009] As a preferred technical solution for the above-mentioned device for disassembling and assembling the flange end cover of the stop valve, a plurality of first protrusions are convexly provided on the end surface of the other end of the rotating member at intervals, and a plurality of first grooves are concavely provided on the outer edge of the fixed member. The plurality of first protrusions and the plurality of first grooves are arranged in a one-to-one correspondence, and the first protrusions can be inserted into the first grooves so that the rotating member drives the fixed member to rotate.

[0010] As an optimal technical solution for the above-mentioned device for disassembling and assembling the flange end cover of the stop valve, the bracket includes a clamp and a plurality of connecting rods, the plurality of connecting rods are evenly spaced along the circumferential direction of the base, and the two ends of the connecting rods are respectively connected to the clamp and the base, and the clamp is used to clamp the valve body.

[0011] As an optimal technical solution for the above-mentioned device for disassembling and assembling the flange end cover of the stop valve, one end of the connecting rod is threadedly connected to the base, and the clamp is provided with a plurality of first through holes, and the plurality of first through holes are arranged in a one-to-one correspondence with the plurality of connecting rods, and the other end of the connecting rod can pass through the first through hole.

[0012] As an optimal technical solution for the above-mentioned device for disassembling and assembling the flange end cover of a stop valve, the clamp includes a first clamp, a second clamp and two locking pieces. The cross-section of the first clamp and the cross-section of the second clamp are both semicircular, and the two ends of the first clamp and the second clamp are respectively connected to the locking pieces.

[0013] As a preferred technical solution of the above-mentioned device for disassembling and assembling the flange end cover of a stop valve, part of the connecting rod is connected to the first clamp, and the other part of the connecting rod is connected to the second clamp.

[0014] As a preferred technical solution of the above-mentioned device for disassembling and assembling the flange end cover of the stop valve, the locking member is a bolt, and the first clamp and the second clamp are both threadedly connected to the locking member.

[0015] As a preferred technical solution of the above-mentioned device for disassembling and assembling the flange end cover of a stop valve, the device for disassembling and assembling the flange end cover of a stop valve further includes a connecting head, and both ends of the connecting head are respectively connected to the fixing member and the driving member.

[0016] As an optimal technical solution for the above-mentioned device for disassembling and assembling the flange end cover of a stop valve, the device for disassembling and assembling the flange end cover of a stop valve also includes a reaction member, which is arranged on the base, and the driving member is an electric torque wrench, and the driving member can offset the reaction member and is used to provide a reaction force to the driving member.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a device for disassembling and assembling a flange end cover of a stop valve. The flange end cover is connected to the valve yoke. The device includes: a bracket, a base, a fixing member, and a driving member. One end of the bracket can be inserted into the interior of the stop valve and can be sleeved on the valve body at the edge of the flange end cover. The other end of the bracket is connected to the base. The base is provided with a limiting groove. One end of the fixing member is rotatably set in the limiting groove, and the other end of the fixing member is sleeved on the outer periphery of the valve yoke. The driving member is configured to drive the fixing member to rotate so that the valve yoke and the flange end cover can rotate relative to the valve body and be unscrewed from the valve body. By using this device, the driving member can transmit the torsional force to the valve yoke through the fixing member. At the same time, the fixing member rotates in the limiting groove, which can prevent torque offset. In addition, compared with manual operation, the magnitude of the torque is easier to control, avoiding excessive torque, preventing thread jamming, avoiding damage to the stop valve, and allowing the flange end cover to be smoothly unscrewed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 A cross-sectional view of the structure of the device for disassembling and assembling the flange end cover of a stop valve provided in an embodiment of the utility model;

[0021] Figure 2 A top view of a base provided in an embodiment of the present utility model;

[0022] Figure 3 A cross-sectional view of a base provided in an embodiment of the present utility model;

[0023] Figure 4 A top view of a fixing member provided in an embodiment of the present utility model;

[0024] Figure 5 A top view of a rotating member provided in an embodiment of the present utility model;

[0025] Figure 6 A cross-sectional view of a rotating member provided in an embodiment of the present utility model;

[0026] Figure 7 This is a schematic structural diagram of a clamp provided in an embodiment of the present utility model.

[0027] In the picture:

[0028] 1. Valve yoke; 2. Base; 21. Limiting groove; 22. Threaded hole; 23. Mounting hole; 24. Second through hole; 3. Fixing member; 31. First groove; 32. Second groove; 4. Driving member; 5. Valve body; 6. Rotating member; 61. First protrusion; 62. Special-shaped hole; 7. Connecting rod; 8. First through hole; 9. First clamp; 10. Second clamp; 11. Locking member; 12. Connecting head; 13. Reaction member. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] like Figures 1 to 7As shown, the utility model provides a device for disassembling and assembling a flange end cover of a stop valve. The flange end cover is connected to a valve yoke 1, and the device includes: a bracket, a base 2, a fixing member 3 and a driving member 4.

[0034] Specifically, one end of the bracket can be inserted into the interior of the stop valve, and one end of the bracket can be sleeved on the valve body 5 at the edge of the flange end cover. The other end of the bracket is connected to the base 2, which is provided with a limiting groove 21. One end of the fixing member 3 is rotatably disposed in the limiting groove 21, and the other end of the fixing member 3 is sleeved on the outer periphery of the valve yoke 1. The driving member 4 is configured to drive the fixing member 3 to rotate, so that the valve yoke 1 and the flange end cover can rotate relative to the valve body 5 and be screwed out of the valve body 5. By using this device, the driving member 4 can transmit torsional force to the valve yoke 1 through the fixing member 3, while the fixing member 3 rotates in the limiting groove 21, which can prevent torque deviation. Moreover, compared with manual operation, the magnitude of the torque is easier to control, avoiding excessive torque, preventing thread seizure, avoiding damage to the stop valve, and allowing the flange end cover to be smoothly screwed out of the valve body 5.

[0035] Optionally, the device for disassembling and assembling the flange end cover of the stop valve further includes a rotating member 6, one end of which is rotatably disposed in the limiting groove 21, and the other end of the rotating member 6 is connected to the fixed member 3. Specifically, the outer diameter of the rotating member 6 is the same as the inner diameter of the limiting groove 21, and one end of the rotating member 6 can be inserted into the limiting groove 21 and abut against the bottom end surface of the limiting groove 21. At the same time, the rotating member 6 can rotate relative to the limiting groove 21, and the other end of the rotating member 6 is connected to the fixed member 3. Such an arrangement can ensure that the rotating member 6 always rotates along the circumferential direction of the limiting groove 21, thereby preventing torque deviation and preventing thread seizure.

[0036] Optionally, a plurality of first protrusions 61 are provided at intervals on the end surface of the other end of the rotating member 6, and a plurality of first grooves 31 are recessed on the outer edge of the fixed member 3. The plurality of first protrusions 61 are provided in a one-to-one correspondence with the plurality of first grooves 31, and the first protrusions 61 can be inserted into the first grooves 31. Specifically, the rotating member 6 is a cylindrical structure, with an end surface of one end of the rotating member 6 being flat, and the end surface of the other end of the rotating member 6 being provided with the first protrusions 61. The outer edge of the fixed member 3 is recessed with the first grooves 31, and the first protrusions 61 are inserted into the first grooves 31. When the rotating member 6 rotates, the side walls of the first protrusions 61 abut against the groove walls of the first grooves 31, and can drive the fixed member 3 to rotate synchronously, so that the fixed member 3 drives the valve yoke 1 to rotate, thereby rotating the flange end cover from the valve body 5.

[0037] Furthermore, the fixing member 3 is a circular ring structure, and a plurality of second grooves 32 are concavely provided on the inner circumference of the fixing member 3, and a plurality of second protrusions are convexly provided on the valve yoke 1. The plurality of second grooves 32 are arranged in a one-to-one correspondence with the plurality of second protrusions, and the second protrusions can be inserted into the second grooves 32. The torsional force is transmitted to the valve yoke 1 through the cooperation between the second protrusions and the second grooves 32.

[0038] Optionally, the bracket includes a clamp and a plurality of connecting rods 7, which are evenly spaced along the circumference of the base 2. The ends of the connecting rods 7 are respectively connected to the clamp and the base 2. The clamp is used to clamp the valve body 5. Specifically, the flange end cover, the fixed member 3, the rotating member 6, the base 2, and the clamp are all coaxially arranged, and the clamp clamps the valve body 5 at the edge of the flange end cover. In this embodiment, the bracket includes four connecting rods 7, which are evenly spaced along the circumference of the base 2. One end of the connecting rod 7 is fixedly connected to the base 2, and the other end of the connecting rod 7 is connected to the clamp. Of course, in other embodiments, the number of connecting rods 7 is determined according to actual conditions and will not be further described here.

[0039] Furthermore, one end of the connecting rod 7 is threadedly connected to the base 2, and the clamp is provided with a plurality of first through holes 8, which are arranged in a one-to-one correspondence with the plurality of connecting rods 7, and the other end of the connecting rod 7 can pass through the first through hole 8. Specifically, one end of the connecting rod 7 is provided with an external thread and is threadedly connected to the base 2, and the clamp is provided with four first through holes 8, and the other end of the connecting rod 7 passes through the first through hole 8, and the base 2 and the clamp are connected via the connecting rod 7.

[0040] Furthermore, the clamp includes a first clamp 9, a second clamp 10, and two locking members 11. The cross-sections of the first clamp 9 and the second clamp 10 are both semicircular, and the ends of the first clamp 9 and the second clamp 10 are respectively connected to the locking members 11. Specifically, the first clamp 9 and the second clamp 10 have the same radius and are jointly mounted around the valve body 5 at the outer edge of the flange end cover. They are locked by the locking members 11 to prevent the first clamp 9 and the second clamp 10 from separating from the valve body 5.

[0041] Optionally, the connecting rods 7 are divided into two groups, one group of connecting rods 7 is connected to the first clamp 9, and the other group of connecting rods 7 is connected to the second clamp 10. Specifically, two connecting rods 7 are connected to the first clamp 9, and two connecting rods 7 are connected to the second clamp 10, so that the overall force of the clamp can be balanced.

[0042] Furthermore, the locking member 11 is a bolt, and the first clamp 9 and the second clamp 10 are both threadedly connected to the locking member 11. Specifically, both ends of the first clamp 9 and the second clamp 10 are provided with internal threads, and the first clamp 9 and the second clamp 10 are threadedly connected by the locking member 11, which can adjust the distance between the first clamp 9 and the second clamp 10 to achieve locking and loosening of the clamps.

[0043] Optionally, the device for disassembling and assembling a flange end cover of a stop valve further includes a connector 12, the two ends of which are respectively connected to the fixing member 3 and the driving member 4. Specifically, the base 2 is provided with a second through hole 24, and the rotating member 6 is provided with a special-shaped hole 62. One end of the connector 12 is a special-shaped structure that matches the special-shaped hole 62. One end of the connector 12 passes through the second through hole 24 and is inserted into the special-shaped hole 62. The other end of the connector 12 is transmission-connected to the driving member 4, which can smoothly transmit the torsional force of the driving member 4 to the rotating member 6.

[0044] Optionally, the device for disassembling and assembling the flange end cover of the stop valve further includes a reaction member 13, which is arranged on the base 2. The driving member 4 is an electric torque wrench. The driving member 4 can counteract the reaction member 13 and is used to provide a reaction force to the driving member 4. Specifically, the base 2 is provided with a mounting hole 23, the reaction member 13 is a limit rod, one end of the reaction member 13 can be inserted into the mounting hole 23, the output end of the driving member 4 is transmission-connected to the connector 12, and the fixed end of the driving member 4 can counteract the other end of the reaction member 13. With such an arrangement, when the driving member 4 transmits a positive torsional force to the flange end cover, the reaction force of the driving member 4 is sequentially transmitted to the valve body 5 through the reaction member 13, the base 2, the connecting rod 7 and the clamp, so that the force directions of the valve body 5 and the flange end cover are opposite, so that the flange end cover can be smoothly rotated out, avoiding human intervention and personal injury.

[0045] The steps for using the device for disassembling and assembling the flange end cover of a stop valve provided by the utility model are as follows:

[0046] Step 1: Clean the surface of the stop valve and confirm that the valve body 5 and the valve yoke 1 are intact and undamaged;

[0047] Step 2: Use a wrench to hang out the valve handwheel fixing nut and remove the valve disc handwheel;

[0048] Step 3: Check each component of the disassembly device to confirm that the components are complete;

[0049] Step 4: Assemble the assembly and disassembly device, place the base 2 flat, with the end surface with the limiting groove 21 facing upwards;

[0050] Step 5: Install the first clamp 9 and the second clamp 10 on the valve body 5 at the edge of the flange end cover and secure them with the locking piece 11. Be careful not to clamp the first clamp 9 and the second clamp 10 on the flange end cover.

[0051] Step 6: Assemble the rotating member 6, base 2, fixed member 3, and connecting rod 7. First, place the flat end of the rotating member 6 directly over the center of the limiting groove 21 of the base 2, ensuring that the outer diameter of the rotating member 6 is completely aligned with the inner diameter of the limiting groove 21 of the base 2. Then, align the four first grooves 31 along the outer edge of the fixed member 3 with the four first protrusions 61 on the rotating member 6, ensuring a complete fit. Then, screw the threaded end of the connecting rod 7 downward into the threaded hole 22 of the base 2. Once the thread is fully engaged, you can determine that the connecting rod 7 is in place. Screw the four connecting rods 7 into the threaded holes 22 one by one.

[0052] Step 7: Use your hands to lift the assembled parts. Align the smooth ends of the four connecting rods 7 with the first through holes 8 and insert them into the four first through holes 8 of the first clamp 9 and the second clamp 10 respectively. At the same time, insert the second protrusion of the valve yoke 1 into the second groove 32 of the fixing member 3.

[0053] Step 8: Finally, align the connector 12 with the center of the bottom of the base 2 and insert it into the special-shaped hole 62 of the rotating member 6, and insert the reaction member 13 into the mounting hole 23 of the base 2;

[0054] Step 9: Start the driving member 4 and gradually output torque from a low torque value to a high torque value. The connector 12 outputs torque to the rotating member 6, and the rotating member 6 outputs torque to the fixing member 3. The fixing member 3 outputs torque to the valve yoke 1, thereby unscrewing the valve yoke 1 and the flange end cover from the valve body 5. At this time, the reaction member 13 is inserted into the base 2 and fixed. The base 2 is connected and fixed to the clamp through the connecting rod 7. The clamp and the valve body 5 are firmly fixed by the locking member 11. Therefore, the driving member 4 outputs reverse torque to the reaction member 13. The reaction torque acts on the valve body 5 through the connecting rod 7 and the clamp, forming a reverse rotational force. The flange end cover is subjected to forward rotational torque, and the valve body 5 is subjected to reverse rotational torque, thereby unscrewing the flange end cover from the valve body 5.

[0055] Step 10: After removing the flange end cover, the drive member 4 can be removed;

[0056] Step 11: Loosen the locking piece 11 and remove the entire device.

[0057] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A device for disassembling and assembling a flange end cover of a stop valve, wherein the flange end cover is connected to a valve yoke (1), characterized in that: include: A bracket, a base (2), a fixing member (3) and a driving member (4), one end of the bracket can be inserted into the interior of the stop valve and can be sleeved on the valve body (5) at the edge of the flange end cover, the other end of the bracket is connected to the base (2), the base (2) is provided with a limiting groove (21), one end of the fixing member (3) is rotatably set in the limiting groove (21), the other end of the fixing member (3) is sleeved on the outer periphery of the valve yoke (1), and the driving member (4) is configured to drive the fixing member (3) to rotate, so that the valve yoke (1) and the flange end cover can rotate relative to the valve body (5) and be screwed out of the valve body (5).

2. The device for disassembling and assembling the flange end cover of a stop valve according to claim 1, characterized in that: The device for disassembling and assembling the flange end cover of the stop valve further comprises a rotating member (6), one end of the rotating member (6) is rotatably disposed in the limiting groove (21), and the other end of the rotating member (6) is connected to the fixing member (3).

3. The device for disassembling and assembling the flange end cover of a stop valve according to claim 2, characterized in that: The end surface of the other end of the rotating member (6) is provided with a plurality of first protrusions (61) at intervals, and the outer edge of the fixing member (3) is provided with a plurality of first grooves (31). The plurality of first protrusions (61) and the plurality of first grooves (31) are provided in a one-to-one correspondence, and the first protrusions (61) can be inserted into the first grooves (31) so that the rotating member (6) drives the fixing member (3) to rotate.

4. The device for disassembling and assembling the flange end cover of a stop valve according to claim 1, characterized in that: The bracket comprises a clamp and a plurality of connecting rods (7), wherein the plurality of connecting rods (7) are evenly spaced along the circumferential direction of the base (2), and the two ends of the connecting rods (7) are respectively connected to the clamp and the base (2), and the clamp is used to clamp the valve body (5).

5. The device for disassembling and assembling the flange end cover of a stop valve according to claim 4, characterized in that: One end of the connecting rod (7) is threadedly connected to the base (2); the clamp is provided with a plurality of first through holes (8); the plurality of first through holes (8) are provided in a one-to-one correspondence with the plurality of connecting rods (7); and the other end of the connecting rod (7) can pass through the first through hole (8).

6. The device for disassembling and assembling the flange end cover of a stop valve according to claim 4, characterized in that: The clamp comprises a first clamp (9), a second clamp (10) and two locking pieces (11); the cross-section of the first clamp (9) and the cross-section of the second clamp (10) are both semicircular; and the two ends of the first clamp (9) and the second clamp (10) are respectively connected to the locking pieces (11).

7. The device for disassembling and assembling the flange end cover of a stop valve according to claim 6, characterized in that: Part of the connecting rod (7) is connected to the first clamp (9), and another part of the connecting rod (7) is connected to the second clamp (10).

8. The device for disassembling and assembling the flange end cover of a stop valve according to claim 6, characterized in that: The locking member (11) is a bolt, and the first clamp (9) and the second clamp (10) are both threadedly connected to the locking member (11).

9. A device for disassembling and assembling a flange end cover of a stop valve according to any one of claims 1 to 8, characterized in that: The device for disassembling and assembling the flange end cover of the stop valve further comprises a connecting head (12), and two ends of the connecting head (12) are respectively connected to the fixing member (3) and the driving member (4).

10. A device for disassembling and assembling a flange end cover of a stop valve according to any one of claims 1 to 8, characterized in that: The device for disassembling and assembling the flange end cover of the stop valve further comprises a reaction member (13), wherein the reaction member (13) is arranged on the base (2); the driving member (4) is an electric torque wrench; the driving member (4) can counteract the reaction member (13) and is used to provide a reaction force to the driving member (4).

Images