A high pressure resistant bellows seal structure

Abstract

This application discloses a high-pressure resistant bellows sealing structure, comprising a valve cover, a valve stem, a bellows, an outer protective tube, and a pressure ring. The valve cover is connected to the upper end of the outer protective tube, and the lower end of the outer protective tube is connected to the valve body. The valve cover presses the pressure ring against the upper end of the outer protective tube. The valve stem passes through the valve cover and the outer protective tube, and an mounting ring is fixedly connected to the valve stem. Connecting blocks are welded and fixed to both the upper and lower ends of the bellows. Both the pressure ring and the mounting ring have annular grooves. Locking blocks are slidably connected to the inner wall of the annular grooves. Multiple locking blocks are distributed along the inner wall of the annular grooves. A sliding groove is formed on the inner wall of the annular grooves for the locking blocks to slide. A return spring is provided in the sliding groove. One end of the return spring is connected to the sliding groove, and the other end of the return spring is connected to the locking block. A wedge-shaped surface is formed on the locking block. An insertion groove is formed on the connecting block to engage with the locking block. A driving component is provided on the connecting block to drive the locking block to slide into the sliding groove. This application achieves quick disassembly of the bellows, facilitating maintenance and replacement.

Description

Technical Field

[0001] This application relates to the field of bellows seals, and more particularly to a high-pressure resistant bellows seal structure. Background Technology

[0002] A bellows valve is a valve that uses a bellows as the valve stem sealing element. The lower end of the bellows is welded to the valve stem, and the upper end is welded to the valve cover plate. When the valve stem rises, the valve opens and the bellows compresses; conversely, when the valve stem falls, the valve closes and the bellows stretches.

[0003] During the long-term use of valves, bellows will suffer some damage due to reciprocating expansion and contraction and the pressure of the medium. After damage, the bellows needs to be replaced. However, existing bellows are usually fixed by welding at both ends, which is extremely inconvenient to disassemble and assemble, affecting maintenance efficiency. Summary of the Invention

[0004] To enable quick assembly and disassembly of bellows, this application provides a high-pressure resistant bellows sealing structure.

[0005] The high-pressure resistant bellows sealing structure provided in this application adopts the following technical solution:

[0006] A high-pressure resistant bellows sealing structure includes a valve cover, a valve stem, a bellows, an outer protective tube, and a pressure ring. The valve cover is connected to the upper end of the outer protective tube, and the lower end of the outer protective tube is connected to the valve body. The valve cover presses the pressure ring against the upper end of the outer protective tube. The valve stem passes through the valve cover and the outer protective tube, and an installation ring is fixedly connected to the valve stem. Connecting blocks are welded and fixed to both the upper and lower ends of the bellows. Annular grooves are formed on the sides of the pressure ring and the installation ring that are close to each other. Locking blocks are slidably connected to the inner walls of the annular grooves. Multiple locking blocks are distributed along the inner wall of the annular groove. A sliding groove is formed on the inner wall of the annular groove for the locking blocks to slide. A return spring is provided in the sliding groove. One end of the return spring is connected to the sliding groove, and the other end of the return spring is connected to the locking block. A wedge-shaped surface is formed on the locking block. An insertion groove is formed on the connecting block to engage with the locking block. A driving member is provided on the connecting block to drive the locking block to slide into the sliding groove. A sealing member is provided in the annular groove to form a seal with the connecting block.

[0007] By adopting the above technical solution, when installing the bellows, the connecting block is inserted into the annular groove, and the wedge-shaped surfaces of the connecting block and the locking block contact each other, causing the locking block to slide into the sliding groove until it enters the insertion groove. At this time, the locking block and the connecting block are locked, realizing the rapid installation of the bellows. When disassembling the bellows, the locking block is driven to slide into the sliding groove by the driving component, so that the locking block is disengaged from the insertion groove, and the connecting block can be easily disengaged from the annular groove. In this way, the bellows can be quickly disassembled and installed, which is convenient for maintenance and replacement.

[0008] Preferably, the sealing element is configured as a sealing gasket, the sealing gasket has an annular structure, and the sealing gasket is embedded in the inner wall of the annular groove.

[0009] By adopting the above technical solution, the sealing at the connection is achieved through the cooperation of the sealing gasket and the connecting block.

[0010] Preferably, the connecting block is provided with an upper cone block and a lower cone block, the upper cone block slides on the connecting block, the insertion groove is formed between the upper cone block and the lower cone block, and the driving member is set as the upper cone block; when disassembling the bellows, the bellows is compressed, the locking block moves to the cone surface of the upper cone block under the action of the wedge surface, and then the bellows is extended, the lower cone block slides outward and abuts against the lower cone block, the cone surface is connected, at this time the locking block slides along the cone surface and gradually disengages from the lower cone block.

[0011] By adopting the above technical solution, when disassembling the bellows, the bellows continues to be compressed, and the amount of compression of the bellows will be greater than the amount of compression of the bellows when the valve stem is lifted; the locking block moves relative to the connecting block, and the locking block slides to the conical surface of the upper conical block through the wedge-shaped surface, and then the bellows extends, so that the connecting block tends to slide to the outside of the annular groove. At this time, the lower conical block moves and abuts against the upper conical block, and the conical surfaces of the two are connected. Then the locking block slides along the conical surface and disengages from the lower conical block, realizing the rapid disassembly of the connecting block and the annular groove.

[0012] Preferably, the connecting block has a sliding groove along the vertical direction, the upper cone block is provided with a sliding block that slides with the sliding block, the sliding groove is provided with a compression spring, one end of the compression spring is connected to the inner wall of the sliding groove, and the other end of the compression spring is connected to the sliding block.

[0013] By adopting the above technical solution, in the initial state, under the cooperation of the gravity of the upper cone block and the compression spring, the size of the insertion groove is slightly smaller than the height of the locking block. However, after the locking block enters the insertion groove, the wedge-shaped surface will cause the upper cone block to move first, so that the locking block can enter the insertion groove. When the bellows is disassembled, after the locking block and the cone surface of the upper cone block come into contact, the locking block and the upper cone block do not separate. Under the action of friction between the locking block and the upper cone block, the upper cone block is difficult to rise with the movement of the connecting block, so that the lower cone block can smoothly abut against the upper cone block.

[0014] Preferably, when the locking block enters the insertion groove, the wedge-shaped surface is completely inserted into the insertion groove, and the upper cone block is provided with a pusher that drives the locking block to slide in the direction of the sliding groove.

[0015] By adopting the above technical solution, if the wedge-shaped surface of the locking block is not fully inserted into the insertion groove, that is, the wedge-shaped surface will abut against the end of the cone surface of the upper cone block, then during the use of the bellows valve, when the valve stem is lifted and the bellows is compressed, there is a risk that the wedge-shaped surface will detach from the upper cone block under the action of the wedge-shaped surface, resulting in the failure of locking the bellows. Therefore, when the wedge-shaped surface is fully inserted into the insertion groove, when the bellows is compressed, the plane of the locking block and the plane of the upper cone block will contact each other, and the two will not move relative to each other, that is, they will not separate. Only when the bellows is disassembled and the amount of bellows compression is large, the pushing component gradually pushes the locking block to slide towards the sliding groove, thereby causing the locking block to gradually move onto the cone surface of the upper cone block.

[0016] Preferably, the pushing member is configured as a push block, which slides on the side of the upper cone block near the lower cone block. A connecting rod is hinged to the lower cone block, one end of which is hinged to the side of the lower cone block away from the connecting block, and the other end of which is hinged to the push block.

[0017] By adopting the above technical solution, when the upper cone block moves away from the lower cone block, the push block gradually slides outward under the action of the connecting rod. The push block pushes the locking block to slide in the direction of the sliding groove. When the wedge surface moves to the end of the upper cone block, the lower cone block descends under the action of the compression spring. The locking block continues to slide in the direction of the sliding groove through the wedge surface, and finally the locking block is disengaged from the insertion groove.

[0018] Preferably, the upper cone block has a sliding groove on the side near the lower cone block, the push block slides and engages with the sliding groove, and the push block protrudes from the sliding groove; the lower cone block has an clearance groove on the side near the upper cone block, and the end of the connecting rod is hinged to the bottom wall of the clearance groove; when the upper cone block and the lower cone block abut, the push block enters the clearance groove.

[0019] By adopting the above technical solution, the connecting rod and push block are accommodated by the clearance groove, thereby ensuring that the upper and lower cone blocks can smoothly abut and achieve the connection of the cone surfaces.

[0020] Preferably, the corrugated pipe is made of stainless steel.

[0021] By adopting the above technical solutions, stainless steel corrugated pipes have strong corrosion resistance and high pressure resistance, and can be used for fluid transportation in various scenarios.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. When installing the bellows, the connecting block is inserted into the annular groove until the locking block is inserted into the insertion groove to lock the bellows in place. When disassembling the bellows, the bellows is compressed, and the locking block moves the upper cone block upward. The locking block gradually separates from the bottom surface of the upper cone block and contacts the cone surface of the upper cone block. Then the bellows is stretched, and the locking block moves the upper cone block to slide and abut against the lower cone block. At this time, the cone surfaces of the two cone blocks are connected, and the locking block slides along the cone surface and separates from the lower cone block, releasing the lock on the connecting block and allowing the bellows to be disassembled. In this way, the bellows can be quickly disassembled and installed, facilitating maintenance and replacement.

[0024] 2. The wedge-shaped surface of the locking block is fully inserted into the insertion groove, and the plane of the locking block is in contact with the plane of the upper cone block. The two will not move relative to each other, that is, they will not separate. When disassembling the bellows, with the help of the push block, when the upper cone block slides away from the lower cone block, the rotation of the connecting rod drives the push block to push the locking block to slide towards the sliding groove, so that the locking block can be smoothly separated from the bottom surface of the upper cone block. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the main body in Embodiment 1 of this application;

[0026] Figure 2 This is a cross-sectional view of the mounting ring in Embodiment 1 of this application;

[0027] Figure 3 This is a state diagram showing the unlocking of the locking block and the lower cone block in Embodiment 1 of this application;

[0028] Figure 4 This is a partial cross-sectional view of the mounting ring in Embodiment 2 of this application;

[0029] Figure 5 This is a schematic diagram showing the state of the locking block and the upper and lower cone blocks during the unlocking process in Embodiment 2 of this application.

[0030] Reference numerals: 1. Valve cover; 2. Valve stem; 3. Bellows; 4. Outer protective tube; 41. Crimping groove; 5. Pressure ring; 6. Mounting ring; 7. Connecting block; 71. Insertion groove; 72. Sliding groove; 721. Compression spring; 8. Ring groove; 81. Sliding groove; 811. Return spring; 82. Locking block; 821. Wedge-shaped surface; 9. Sealing gasket; 10. Upper cone block; 101. Sliding block; 102. Sliding groove; 20. Lower cone block; 201. Clearance groove; 30. Push block; 40. Connecting rod. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.

[0032] This application discloses a high-pressure resistant bellows sealing structure.

[0033] Example 1

[0034] Reference Figure 1 and Figure 2 The high-pressure resistant bellows sealing structure includes a valve cover 1, a valve stem 2, a bellows 3, an outer protective tube 4, and a pressure ring 5. The upper ends of the valve cover 1 and the outer protective tube 4 are fixedly connected by bolts. The outer protective tube 4 is welded to the valve body. The valve body structure is not shown in this application. The valve cover 1 presses the pressure ring 5 against the upper end of the outer protective tube 4. The upper end of the outer protective tube 4 is provided with a crimping groove 41 to accommodate the pressure ring 5. The valve stem 2 passes through the valve cover 1 and the outer protective tube 4. An installation ring 6 is welded and fixed on the valve stem 2. The bellows 3 is made of stainless steel. Connecting blocks 7 are welded and fixed at both the upper and lower ends of the bellows 3. The connecting blocks 7 are arranged in a ring shape. The pressure ring 5 and the installation ring 6 are provided with annular grooves 8 on the side that are close to each other. The connecting blocks 7 are inserted into the corresponding annular grooves 8.

[0035] Since the mounting structures of the pressure ring 5 and the mounting ring 6 are the same, this application will describe the specific structure of the mounting ring 6. Multiple sliding grooves 81 are spaced apart on the inner wall of the annular groove 8. Locking blocks 82 are slidably fitted within the sliding grooves 81; that is, multiple locking blocks 82 are also provided. A return spring 811 is provided within the sliding groove 81. One end of the return spring 811 is connected to the inner wall of the sliding groove 81, and the other end is connected to the locking block 82. A wedge-shaped surface 821 is formed on the locking block 82. An insertion groove 71 is formed on the connecting block 7 to engage with the locking block 82. A driving element is provided on the connecting block 7 to drive the locking block 82 to slide into the sliding groove 81. A sealing element is provided within the annular groove 8. The sealing element is a sealing gasket 9, which is embedded in the outermost inner wall of the annular groove 8, forming a seal with the connecting block 7.

[0036] During the installation of the bellows 3, the connecting block 7 is inserted into the annular groove 8. During the insertion process, the connecting block 7 will come into contact with the wedge-shaped surface 821 of the locking block 82. Due to the guiding effect of the wedge-shaped surface 821, the locking block 82 will first slide into the sliding groove 81. When the locking block 82 moves to the insertion groove 71, it will spring into the insertion groove 71 under the action of the return spring 811. At this time, the locking block 82 and the connecting block 7 are locked, thereby quickly completing the installation of the bellows 3.

[0037] When it is necessary to disassemble the bellows 3, simply drive the locking block 82 to slide into the sliding groove 81 via the driving component, causing the locking block 82 to disengage from the insertion groove 71. This releases the locking between the connecting block 7 and the annular groove 8, allowing the connecting block 7 to be easily pulled out of the annular groove 8, thus achieving quick disassembly of the bellows 3. This design greatly simplifies the assembly and disassembly process of the bellows 3, providing significant convenience for subsequent maintenance and replacement work.

[0038] The connecting block 7 has an upper conical block 10 and a lower conical block 20. The driving component is the upper conical block 10. A sliding groove 72 is formed on the connecting block 7 in the vertical direction. The upper conical block 10 has a sliding block 101 that slides and engages with the sliding groove 72. That is, the upper conical block 10 is slidably connected to the connecting block 7. The lower conical block 20 is fixed and connected to the connecting block 7. An insertion groove 71 is formed between the upper conical block 10 and the lower conical block 20. A compression spring 721 is provided in the sliding groove 72. One end of the compression spring 721 is connected to the inner wall of the sliding groove 72, and the other end is connected to the sliding block 101. The compression spring 721 located on the lower side is in a stretched state under the gravity of the upper conical block 10, and the compression spring 721 located on the upper side is in a compressed state under the action of the upper conical block 10.

[0039] Reference Figure 3 When disassembling the bellows 3, it needs to be further compressed, and this compression is greater than the compression of the bellows 3 when the valve stem 2 is lifted, causing the connecting block 7 to move inward toward the annular groove 8. During this process, the locking block 82 moves relative to the connecting block 7. After the wedge-shaped surface 821 enters the insertion groove 71, the wedge-shaped surface 821 does not completely enter the insertion groove 71, but slides onto the conical surface of the upper cone block 10. Subsequently, the bellows 3 is slowly extended, causing the connecting block 7 to slide outward toward the annular groove 8. At this time, the lower cone block 20 moves upward first, and then, under the frictional force of the locking block 82 on the upper cone block 10, the lower cone block 20 abuts against the upper cone block 10, and the conical surfaces of the two connect to form a guide structure. Finally, the locking block 82 slides along the conical surface and disengages from the lower cone block 20, releasing the lock on the connecting block 7, thereby achieving rapid disassembly of the connecting block 7 and the annular groove 8.

[0040] In the initial state, due to the combined effect of the weight of the upper cone block 10 and the elastic force of the compression spring 721, the height of the insertion slot 71 is slightly smaller than the height of the locking block 82. However, when the locking block 82 is inserted into the insertion slot 71, its wedge-shaped surface 821 generates a guiding thrust, forcing the upper cone block 10 to make a slight displacement, thereby making room for the locking block 82 to enter and ensure that the locking block 82 can smoothly enter the insertion slot 71 to complete the locking.

[0041] When disassembling the bellows 3, after the locking block 82 contacts the conical surface of the upper conical block 10, under the action of the return spring 811, the locking block 82 will generate a large pressure on the conical surface of the upper conical block 10, that is, there is a large frictional force. The locking block 82 will not disengage from the upper conical block 10. The lower conical block 20 gradually moves, and under the action of the frictional force of the locking block 82 on the upper conical block 10, the lower conical block 20 can smoothly abut against the upper conical block 10, thereby achieving conical surface connection. The locking block 82 can move along the conical surface and disengage from the lower conical block 20.

[0042] The implementation principle of the high-pressure resistant bellows sealing structure in this application embodiment is as follows: When installing the bellows 3, the connecting block 7 is inserted into the annular groove 8. The connecting block 7 is locked by the insertion of the locking block 82 and the insertion groove 71, thus achieving rapid installation of the bellows 3. When disassembling the bellows 3, the bellows 3 is first over-compressed. At this time, under the action of the wedge surface 821, the locking block 82 will gradually move to the conical surface of the upper conical block 10. Then, the bellows 3 is stretched, so that the connecting block 7 slides to the outside of the annular groove 8. During this process, the upper conical block 10 and the lower conical block 20 gradually abut, and their conical surfaces connect. Then the locking block 82 can move along the conical surface and disengage from the lower conical block 20, thus achieving rapid disassembly of the bellows 3.

[0043] Example 2

[0044] Reference Figure 4 The difference between this embodiment and embodiment 1 is that when the locking block 82 enters the insertion groove 71, the wedge-shaped surface 821 extends completely into the insertion groove 71, and the upper cone block 10 is provided with a pusher that drives the locking block 82 to slide in the direction of the sliding groove 81.

[0045] If the wedge-shaped surface 821 of the locking block 82 does not fully enter the insertion groove 71, its end will abut against the conical surface of the upper cone block 10. During the use of the bellows 3 valve, when the valve stem 2 is lifted, causing the bellows 3 to compress, the wedge-shaped surface 821 may generate a sliding component force along the conical surface due to the force, which may cause it to detach from the upper cone block 10, thereby causing the bellows 3 to fail to lock.

[0046] Therefore, only when the wedge-shaped surface 821 is fully inserted into the insertion slot 71 will the contact surface between the locking block 82 and the upper cone block 10 change from an inclined plane to a flat plane. At this time, the axial force generated by the compression of the bellows 3 acts perpendicularly on the flat contact surface, and the two will not have a relative slippage tendency, thus ensuring a stable and reliable locking state.

[0047] Only when disassembling the bellows 3, a greater amount of compression needs to be applied to the bellows 3. The locking block 82 is driven to move towards the sliding groove 81 by the pusher. With the action of the upper cone block 10 and the wedge surface 821, the locking block 82 disengages from the insertion groove 71 and then abuts against the cone surface of the upper cone block 10. The guiding characteristics of the cone surface are used to release the locking state, which not only ensures the connection strength during normal operation, but also meets the operational convenience during disassembly.

[0048] The pushing component is set as a push block 30. A sliding groove 102 is provided on the side of the upper cone block 10 near the lower cone block 20. The push block 30 slides and engages with the sliding groove 102. In practice, a guide block is provided on the side of the push block 30 and guides and engages with the guide groove on the inner wall of the sliding groove 102 to ensure that the push block 30 will not come out of the sliding groove 102. The push block 30 protrudes from the sliding groove 102. A clearance groove 201 is provided on the side of the lower cone block 20 near the upper cone block 10. A connecting rod 40 is hinged on the bottom wall of the clearance groove 201. The hinge point between the connecting rod 40 and the bottom wall of the clearance groove 201 is located on the side away from the connecting block 7. The other end of the connecting rod 40 is hinged to the push block 30.

[0049] Reference Figure 5 When the upper cone block 10 moves away from the lower cone block 20, the connecting rod 40 transmits the movement synchronously. Driven by the connecting rod 40, the push block 30 gradually slides outward, and during this process, the compression spring 721 is compressed. The push block 30 pushes the locking block 82, forcing the locking block 82 to move towards the sliding groove 81. As the locking block 82 moves, when the wedge surface 821 disengages from the insertion groove 71, the compression spring 721 acts, the upper cone block 10 moves downward, and the locking block 82 continues to slide into the sliding groove 82. Its engagement with the insertion groove 71 is gradually released, and finally the locking block 82 is completely disengaged from the insertion groove 71, completing the disassembly process. This design, which transmits displacement through the connecting rod 40 mechanism, can convert the linear motion of the upper cone block 10 into the radial motion of the push block 30, thereby controlling the movement trajectory of the locking block 82 and ensuring the reliability and convenience of the bellows 3 disassembly and assembly operations. When the upper cone block 10 and the lower cone block 20 abut, the push block 30 enters the clearance groove 201, which accommodates the connecting rod 40 and the push block 30, thereby ensuring that the upper cone block 10 and the lower cone block 20 can abut smoothly.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-pressure resistant bellows sealing structure, characterized in that: The valve includes a valve cover (1), a valve stem (2), a bellows (3), an outer protective tube (4), and a pressure ring (5). The valve cover (1) is connected to the upper end of the outer protective tube (4), and the lower end of the outer protective tube (4) is connected to the valve body. The valve cover (1) presses the pressure ring (5) against the upper end of the outer protective tube (4). The valve stem (2) passes through the valve cover (1) and the outer protective tube (4). An installation ring (6) is fixedly connected to the valve stem (2). Connecting blocks (7) are welded and fixed to both the upper and lower ends of the bellows (3). An annular groove (8) is opened on the side of the pressure ring (5) and the installation ring (6) that are close to each other. A locking block (82) is slidably connected to the inner wall of the annular groove (8). The locking block (82) moves along the annular groove (8). The inner wall is provided with multiple ring grooves. The inner wall of the ring groove (8) is provided with a sliding groove (81) for the locking block (82) to slide. A return spring (811) is provided in the sliding groove (81). One end of the return spring (811) is connected to the sliding groove (81), and the other end of the return spring (811) is connected to the locking block (82). A wedge-shaped surface (821) is formed on the locking block (82). A plug-in groove (71) is formed on the connecting block (7) to engage with the locking block (82). A driving member is provided on the connecting block (7) to drive the locking block (82) to slide into the sliding groove (81). A sealing member is provided in the ring groove (8) to form a seal with the connecting block (7).

2. The high-pressure resistant bellows sealing structure according to claim 1, characterized in that: The sealing element is configured as a sealing gasket (9), which has an annular structure and is embedded in the inner wall of the annular groove (8).

3. The high-pressure resistant bellows sealing structure according to claim 1, characterized in that: The connecting block (7) is provided with an upper cone block (10) and a lower cone block (20). The upper cone block (10) slides on the connecting block (7). The insertion groove (71) is formed between the upper cone block (10) and the lower cone block (20). The driving member is set as the upper cone block (10). When disassembling the bellows (3), the bellows (3) is compressed. The locking block (82) moves to the cone surface of the upper cone block (10) under the action of the wedge surface (821). Then the bellows (3) is extended. The lower cone block (20) slides outward and abuts against the lower cone block (20). The cone surfaces are connected. At this time, the locking block (82) slides along the cone surface and gradually disengages from the lower cone block (20).

4. The high-pressure resistant bellows sealing structure according to claim 3, characterized in that: The connecting block (7) has a sliding groove (72) in the vertical direction. The upper cone block (10) is provided with a sliding block (101) that slides and cooperates with the sliding groove (72). A compression spring (721) is provided in the sliding groove (72). One end of the compression spring (721) is connected to the inner wall of the sliding groove (72), and the other end of the compression spring (721) is connected to the sliding block (101).

5. The high-pressure resistant bellows sealing structure according to claim 4, characterized in that: When the locking block (82) enters the insertion groove (71), the wedge-shaped surface (821) is completely inserted into the insertion groove (71). The upper cone block (10) is provided with a pusher that drives the locking block (82) to slide in the direction of the sliding groove (81).

6. The high-pressure resistant bellows sealing structure according to claim 5, characterized in that: The pusher is configured as a push block (30), which slides on the side of the upper cone block (10) near the lower cone block (20). A connecting rod (40) is hinged on the lower cone block (20). One end of the connecting rod (40) is hinged to the side of the lower cone block (20) away from the connecting block (7), and the other end of the connecting rod (40) is hinged to the push block (30).

7. The high-pressure resistant bellows sealing structure according to claim 6, characterized in that: The upper cone block (10) has a sliding groove (102) on the side near the lower cone block (20), and the push block (30) slides and engages with the sliding groove (102), and the push block (30) protrudes from the sliding groove (102); the lower cone block (20) has a clearance groove (201) on the side near the upper cone block (10), and the end of the connecting rod (40) is hinged to the bottom wall of the clearance groove (201); when the upper cone block (10) and the lower cone block (20) abut, the push block (30) enters the clearance groove (201).

8. The high-pressure resistant bellows sealing structure according to claim 1, characterized in that: The corrugated pipe (3) is made of stainless steel.

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