A steel structure fast installation joint structure

Abstract

This invention discloses a rapid installation node structure for steel structures, including steel columns and beams. A beam connecting seat is fixedly connected to the side of the steel column, and a matching groove is provided on the beam connecting seat. Closing sections are provided at both ends of the beam, and the closing sections fit into the matching grooves. Installation positioning components and auxiliary fixing components are provided on the matching grooves. By setting up the beam connecting seat, when connecting the steel column and beam, the closing sections on the beam are fitted into the matching grooves on the beam connecting seat, completing the initial positioning of the steel column and beam. Then, auxiliary positioning is performed using the installation positioning components, and fixing is performed using the auxiliary fixing components. This replaces welding to a certain extent, simplifying the operation and improving efficiency. The fitting operation of the closing sections into the matching grooves solves the problems of inaccurate positioning, limited application range, and difficulty in welding in super high-rise steel structure buildings caused by the existing direct welding fixing method.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a rapid installation node structure for steel structures. Background Technology

[0002] Steel structure buildings are a new type of building system that breaks down the boundaries between the real estate, construction, and metallurgical industries, integrating them into a new industrial system. This is the steel structure building system that is generally favored by industry insiders.

[0003] Compared to traditional concrete buildings, steel structure buildings use steel plates or profiles instead of reinforced concrete, resulting in higher strength and better earthquake resistance. Furthermore, because components can be factory-fabricated and installed on-site, construction time is significantly reduced. The reusability of steel greatly reduces construction waste, making it more environmentally friendly. Therefore, it is widely adopted by countries around the world in both industrial and residential buildings.

[0004] Most existing steel structure installations are fixed by direct welding, but this method is prone to inaccurate positioning and has limited applicability. Welding in super high-rise steel structure buildings is particularly difficult. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rapid installation node structure for steel structures, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A quick-installation steel structure node structure includes a steel column and a beam. The side of the steel column is fixedly connected to a beam connecting seat. The beam connecting seat is provided with a fitting groove. Both ends of the beam are provided with closing sections, which are fitted into the fitting groove.

[0008] The fitting groove is provided with a mounting and positioning component and an auxiliary fixing component.

[0009] Preferably, the fitting groove is adapted to the curvature of the closing section surface.

[0010] Preferably, the installation positioning component includes a support fixing column fixedly connected to the fitting groove. The support fixing column is symmetrically arranged on the outer side of the edge of the fitting groove. A first rotating seat is fixedly connected to the upper end of the support fixing column. A third transmission rod is rotatably connected to the first rotating seat. A second pressing block is rotatably connected to the end of the third transmission rod away from the first rotating seat.

[0011] Preferably, a first transmission rod is rotatably connected to the middle section of the supporting and fixing column, and a second transmission rod is rotatably connected to the end of the first transmission rod away from the supporting and fixing column;

[0012] A pressure rod is rotatably connected to the support and fixed column, and the connection point of the pressure rod on the support and fixed column is located below the connection point of the first transmission rod on the support and fixed column.

[0013] The end of the pressure rod away from the support fixed column is rotatably connected to the middle section of the second transmission rod;

[0014] A tension rod is connected at the connection point between the first transmission rod and the second transmission rod, and the tension rod is rotatably connected to the first transmission rod and the second transmission rod;

[0015] The end of the tension rod away from the first and second transmission rods is rotatably connected to a second rotating seat, and the second rotating seat is fixedly connected to the third transmission rod.

[0016] Preferably, two sets of pressure-bearing blocks are evenly distributed on the circumferential side of the closing section;

[0017] The second transmission rod is provided with a first pressing block at the end away from the first transmission rod;

[0018] The first pressing block abuts against the pressure-bearing block.

[0019] Preferably, the installation and positioning component has a positioning completed state;

[0020] When the installation positioning component is in the positioning completed state, the first pressing block abuts against the pressure block;

[0021] When the installation positioning component is in the positioning completed state, the second pressing block abuts against the upper side of the closing section;

[0022] When the positioning assembly is in the positioning completed state, the included angle between the first transmission rod and the second transmission rod is 180°.

[0023] Preferably, the auxiliary fixing component includes a sleeve disposed on the closing section, the sleeve being fixedly connected to the closing section, a push-button slider being inserted into the sleeve, the end of the push-button slider facing the sleeve being tapered, a through groove being provided on the sleeve, a locking plate being slidably connected in the through groove, the end of the locking plate facing the push-button slider being inclined, and the push-button slider abutting against the inclined surface of the locking plate;

[0024] A locking hole is provided on the outer side of the through groove, and the locking hole is provided on the fitting groove.

[0025] Preferably, a first elastic element is provided inside the sleeve, a connecting box is fixedly connected to the first elastic element, a second elastic element is provided inside the connecting box, one end of the second elastic element is connected to the inner wall of the connecting box, and the other end of the second elastic element is connected to a linkage slider, the linkage slider being slidably connected to the connecting box.

[0026] The linkage slider part passes through the connecting box, and the linkage slider located on the outside of the connecting box is fixedly connected to the positioning plate.

[0027] Preferably, a limiting post is provided inside the sleeve, a receiving frame plate is fixedly connected to the limiting post, a fixing frame is fixedly connected to the receiving frame plate, and a ratchet and a gear are coaxially rotatably connected inside the fixing frame;

[0028] The fixed frame is provided with a third elastic element, the two ends of which are fixedly connected to the fixed frame and the pressing slider, respectively. The third elastic element is located in a limiting groove provided in the pressing slider. A rack is fixedly connected in the limiting groove, and the rack meshes with a gear.

[0029] Preferably, a sealing groove is provided inside the limiting post, a sealing sliding pad is slidably connected inside the sealing groove, a fourth elastic element is provided between the sealing sliding pad and the bottom of the sealing groove, the two ends of the fourth elastic element are respectively fixedly connected to the sealing sliding pad and the sealing groove, a limiting sliding plate is fixedly connected on the sealing sliding pad, and the limiting sliding plate penetrates the receiving frame plate.

[0030] The sealing groove on the side of the sealing sliding pad away from the fourth elastic element is connected to the outside through a through hole;

[0031] A fixed connecting block is fixedly connected to the receiving frame plate, a mounting plate is slidably connected to the receiving frame plate, and movable connecting blocks are fixedly connected to both sides of the mounting plate. The movable connecting blocks and the fixed connecting blocks are connected by a fifth elastic element.

[0032] The limiting sliding plate abuts against the side wall of the mounting plate;

[0033] A connecting frame is fixedly connected to the mounting plate, and a clamping plate is rotatably connected to the connecting frame via a shaft. The clamping plate engages with a ratchet.

[0034] A torsion spring is provided on the shaft connecting the card plate and the connecting frame.

[0035] Compared with the prior art, the present invention has at least the following beneficial effects:

[0036] This application sets up a crossbeam connector, which fits the closing section on the crossbeam into the matching groove on the crossbeam connector when connecting the steel column and the crossbeam, thus completing the rough positioning of the steel column and the crossbeam. Then, the positioning component is installed for auxiliary positioning, and the fixing component is used for fixing. This replaces welding to a certain extent, simplifies the operation and improves efficiency.

[0037] By using the fitting operation of the closing section and the matching groove, the problems of inaccurate positioning, limited application range, and difficulty in welding in super high-rise steel structure buildings caused by the existing direct welding and fixing method are solved. Attached Figure Description

[0038] Figure 1 This is a front view schematic diagram of the main structure of the present invention;

[0039] Figure 2 This is a top view of the main structure of the present invention in an unconnected state;

[0040] Figure 3 This is a left-side view of the installation and positioning component structure of the present invention in the completed positioning state;

[0041] Figure 4 This is a left-side view of the installation and positioning component structure of the present invention in an unpositioned state;

[0042] Figure 5 This is a front view schematic diagram of the auxiliary fixing component structure of the present invention;

[0043] Figure 6 This is a schematic front view of a partial structure of the auxiliary fixing component of the present invention;

[0044] Figure 7 This is a left-side view of a partial structure of the auxiliary fixing component of the present invention.

[0045] In the diagram: 1. Steel column; 2. Crossbeam connecting seat; 3. Crossbeam; 4. Fitting groove; 5. Closing section; 6. Supporting and fixing column; 7. Pressure rod; 8. First transmission rod; 9. Bearing block; 10. Second transmission rod; 11. First pressing block; 12. Tension rod; 13. First rotating seat; 14. Second rotating seat; 15. Third transmission rod; 16. Second pressing block; 17. Sleeve; 18. Pressing slider; 19. Positioning plate; 20. Through groove; 21. First elastic element; 2. Connecting box; 23. Linkage slider; 24. Second elastic element; 25. Third elastic element; 26. Rack; 27. Ratchet; 28. Gear; 29. ​​Fixing frame; 30. Limiting post; 31. Through hole; 32. Sealing sliding pad; 33. Sealing groove; 34. Fourth elastic element; 35. Limiting sliding plate; 36. Mounting plate; 37. Clamping plate; 38. Connecting frame; 39. Moving connecting block; 40. Fifth elastic element; 41. Fixed connecting block; 42. Supporting frame plate. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0047] Example 1

[0048] Please see Figure 1-2 The present invention provides a technical solution: a quick-installation steel structure node structure, including a steel column 1 and a crossbeam 3. A crossbeam connecting seat 2 is fixedly connected to the side of the steel column 1. A fitting groove 4 is provided on the crossbeam connecting seat 2. A closing section 5 is provided at both ends of the crossbeam 3. The closing section 5 is fitted into the fitting groove 4.

[0049] The fitting groove 4 is provided with an installation positioning component and an auxiliary fixing component.

[0050] Preferably, the fitting groove 4 is adapted to the surface curvature of the closing section 5.

[0051] The working principle and beneficial effects of the above scheme are as follows:

[0052] This application sets up a crossbeam connecting seat 2, so that when connecting the steel column 1 and the crossbeam 3, the closing section 5 on the crossbeam 3 is fitted into the matching groove 4 on the crossbeam connecting seat 2, thus completing the rough positioning of the steel column 1 and the crossbeam 3. Then, the positioning component is installed for auxiliary positioning, and the auxiliary fixing component is used for fixing operation, which to a certain extent replaces welding, simplifies the operation and improves efficiency.

[0053] By engaging the closing section 5 with the fitting groove 4, the problems of inaccurate positioning, limited application range, and difficulty in welding super high-rise steel structure buildings caused by the existing direct welding and fixing method are solved.

[0054] Example 2

[0055] Please see Figure 3-4 Based on Embodiment 1, the installation positioning component includes a support fixing column 6 fixedly connected to the fitting groove 4. The support fixing column 6 is symmetrically arranged on the outer side of the edge of the fitting groove 4. A first rotating seat 13 is fixedly connected to the upper end of the support fixing column 6. A third transmission rod 15 is rotatably connected to the first rotating seat 13. A second pressing block 16 is rotatably connected to the end of the third transmission rod 15 away from the first rotating seat 13.

[0056] Preferably, a first transmission rod 8 is rotatably connected to the middle section of the supporting and fixing column 6, and a second transmission rod 10 is rotatably connected to the end of the first transmission rod 8 away from the supporting and fixing column 6.

[0057] A pressure rod 7 is rotatably connected to the support and fixing column 6, and the connection point of the pressure rod 7 on the support and fixing column 6 is located below the connection point of the first transmission rod 8 on the support and fixing column 6.

[0058] The end of the pressure rod 7 away from the support and fixing column 6 is rotatably connected to the middle section of the second transmission rod 10;

[0059] A tension rod 12 is connected at the connection point between the first transmission rod 8 and the second transmission rod 10, and the tension rod 12 is rotatably connected to the first transmission rod 8 and the second transmission rod 10.

[0060] The end of the tension rod 12 away from the first transmission rod 8 and the second transmission rod 10 is rotatably connected to a second rotating seat 14, and the second rotating seat 14 is fixedly connected to the third transmission rod 15.

[0061] Preferably, two sets of pressure blocks 9 are evenly distributed on the circumferential side surface of the closing section 5;

[0062] The second transmission rod 10 is provided with a first pressing block 11 at the end away from the first transmission rod 8;

[0063] The first pressing block 11 abuts against the pressure-bearing block 9.

[0064] Preferably, the installation and positioning component has a positioning completed state;

[0065] When the installation positioning component is in the positioning completed state, the first pressing block 11 abuts against the pressure block 9.

[0066] When the installation positioning component is in the positioning completed state, the second pressing block 16 abuts against the upper side of the closing section 5.

[0067] When the positioning assembly is in the positioning completed state, the included angle between the first transmission rod 8 and the second transmission rod 10 is 180°.

[0068] The working principle and beneficial effects of the above scheme are as follows:

[0069] When positioning the crossbeam 3, when the installation positioning component is in the positioning completed state, the first pressing block 11 is pressed against the bearing block 9 and the second pressing block 16 is pressed against the outer side above the closing section 5. The included angle between the first transmission rod 8 and the second transmission rod 10 is 180°, that is, the installation positioning component is in the dead point position, which avoids the crossbeam 3 from accidentally jumping and causing the first pressing block 11 to separate from the bearing block 9 and the second pressing block 16 to separate from the closing section 5. It also avoids the crossbeam 3 from rolling, provides a stable and reliable limiting effect on the crossbeam 3, and does not generate additional load on the transmission mechanism (used to drive the installation positioning component to reach the positioning completed state).

[0070] By installing positioning components to position the crossbeam 3, the accuracy of the steel structure is ensured, and the problem of inaccurate positioning caused by the existing direct welding and fixing method is solved.

[0071] Example 3

[0072] Please see Figure 5-7Based on embodiments 1-2, the auxiliary fixing component includes a sleeve 17 disposed on the closing section 5. The sleeve 17 is fixedly connected to the closing section 5. A push-button slider 18 is inserted into the sleeve 17. The end of the push-button slider 18 facing the sleeve 17 is tapered. A through groove 20 is provided on the sleeve 17. A locking plate 19 is slidably connected in the through groove 20. The end of the locking plate 19 facing the push-button slider 18 is inclined. The push-button slider 18 abuts against the inclined surface of the locking plate 19.

[0073] A locking hole is provided on the outer side of the through groove 20, and the locking hole is provided on the fitting groove 4.

[0074] Preferably, a first elastic element 21 is provided inside the sleeve 17, a connecting box 22 is fixedly connected to the first elastic element 21, a second elastic element 24 is provided inside the connecting box 22, one end of the second elastic element 24 is connected to the inner wall of the connecting box 22, and the other end of the second elastic element 24 is connected to a linkage slider 23, which is slidably connected to the connecting box 22.

[0075] The linkage slider 23 partially penetrates the connecting box 22, and the linkage slider 23 located on the outside of the connecting box 22 is fixedly connected to the positioning plate 19.

[0076] Preferably, a limiting post 30 is provided inside the sleeve 17, a receiving frame plate 42 is fixedly connected to the limiting post 30, a fixing frame 29 is fixedly connected to the receiving frame plate 42, and a ratchet 27 and a gear 28 are coaxially rotatably connected inside the fixing frame 29.

[0077] The fixed frame 29 is provided with a third elastic element 25. The two ends of the third elastic element 25 are fixedly connected to the fixed frame 29 and the push slider 18, respectively. The third elastic element 25 is located in the limiting groove provided in the push slider 18. A rack 26 is fixedly connected in the limiting groove, and the rack 26 meshes with the gear 28.

[0078] Preferably, a sealing groove 33 is provided inside the limiting post 30, and a sealing sliding pad 32 is slidably connected inside the sealing groove 33. A fourth elastic element 34 is provided between the sealing sliding pad 32 and the bottom of the sealing groove 33. The two ends of the fourth elastic element 34 are respectively fixedly connected to the sealing sliding pad 32 and the sealing groove 33. A limiting sliding plate 35 is fixedly connected to the sealing sliding pad 32, and the limiting sliding plate 35 penetrates the receiving frame plate 42.

[0079] The sealing groove 33 on the side of the sealing sliding pad 32 away from the fourth elastic element 34 is connected to the outside through the through hole 31.

[0080] A fixed connecting block 41 is fixedly connected to the receiving frame plate 42, and a mounting plate 36 is slidably connected to the receiving frame plate 42. Movable connecting blocks 39 are fixedly connected to both sides of the mounting plate 36, and the movable connecting blocks 39 and the fixed connecting blocks 41 are connected by a fifth elastic element 40.

[0081] The limiting sliding plate 35 abuts against the side wall of the mounting plate 36;

[0082] A connecting frame 38 is fixedly connected to the mounting plate 36. The connecting frame 38 is rotatably connected to a clamping plate 37 via a shaft. The clamping plate 37 engages with a ratchet 27.

[0083] A torsion spring is provided on the shaft connecting the card plate 37 and the connecting frame 38.

[0084] The working principle and beneficial effects of the above scheme are as follows:

[0085] When the mating groove 4 and the closing section 5 are engaged, push the sliding block 18. The sliding block 18 presses the locking plate 19, and the through groove 20 extends and engages with the locking hole on the mating groove 4, thus completing the fixation of the steel column 1 and the crossbeam 3. When the sliding block 18 is pushed, the rack 26 and the gear 28 move relative to each other, which drives the ratchet 27 on the same axis to rotate. The ratchet 27 is restricted by the locking plate 37 and rotates in one direction to prevent the locking plate 19 from being reset under the action of the second elastic element 24, thus releasing the locking and fixing state.

[0086] When the steel column 1 is separated from the crossbeam 3, pressure is applied to the side of the sealing sliding pad 32 away from the fourth elastic element 34 through the through hole 31, squeezing the sealing sliding pad 32 and compressing the fourth elastic element 34. The sealing sliding pad 32 drives the limiting sliding plate 35 to move, releasing the limitation of the limiting sliding plate 35 on the mounting plate 36. The mounting plate 36 moves under the action of the fifth elastic element 40, driving the locking plate 37 to move, releasing the limitation of the locking plate 37 on the ratchet 27. The locking plate 19 resets under the action of the second elastic element 24, releasing the fixed connection between the steel column 1 and the crossbeam 3.

[0087] By setting up auxiliary fixing components, welding can be replaced to a certain extent, simplifying operations and improving efficiency. This solves the problem that the existing technology of direct welding fixing has a limited scope of application and is difficult to weld in super high-rise steel structure buildings.

[0088] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0089] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-installation joint structure for steel structures, characterized in that: Includes a steel column (1) and a crossbeam (3). The steel column (1) is fixedly connected to a crossbeam connecting seat (2) on its side. The crossbeam connecting seat (2) is provided with a fitting groove (4). The crossbeam (3) is provided with closing sections (5) at both ends. The closing sections (5) are fitted into the fitting groove (4). The fitting groove (4) is provided with a mounting positioning component and an auxiliary fixing component; The installation positioning assembly includes a support fixing column (6) fixedly connected to the fitting groove (4). The support fixing column (6) is symmetrically arranged on the outer side of the edge of the fitting groove (4). A first rotating seat (13) is fixedly connected to the upper end of the support fixing column (6). A third transmission rod (15) is rotatably connected to the first rotating seat (13). A second pressing block (16) is rotatably connected to the end of the third transmission rod (15) away from the first rotating seat (13). The middle section of the support and fixing column (6) is rotatably connected to a first transmission rod (8), and the end of the first transmission rod (8) away from the support and fixing column (6) is rotatably connected to a second transmission rod (10). A pressure rod (7) is rotatably connected to the support fixing column (6), and the connection point of the pressure rod (7) on the support fixing column (6) is located below the connection point of the first transmission rod (8) on the support fixing column (6); The end of the pressure rod (7) away from the support fixing column (6) is rotatably connected to the middle section of the second transmission rod (10); A tension rod (12) is connected at the connection point between the first transmission rod (8) and the second transmission rod (10), and the tension rod (12) is rotatably connected to the first transmission rod (8) and the second transmission rod (10); The end of the tension rod (12) away from the first transmission rod (8) and the second transmission rod (10) is rotatably connected to a second rotating seat (14), and the second rotating seat (14) is fixedly connected to the third transmission rod (15). Two sets of pressure blocks (9) are evenly distributed on the circumferential side of the closing section (5). The second transmission rod (10) has a first pressing block (11) at the end away from the first transmission rod (8); The first pressing block (11) abuts against the pressure-bearing block (9); The installation and positioning component has a positioning completed state; When the installation positioning component is in the positioning completed state, the first pressing block (11) abuts against the pressure block (9); When the installation positioning component is in the positioning completed state, the second pressing block (16) abuts against the upper side of the closing section (5); When the installation positioning component is in the positioning completed state, the included angle between the first transmission rod (8) and the second transmission rod (10) is 180°; The auxiliary fixing component includes a sleeve (17) disposed on the closing section (5), the sleeve (17) being fixedly connected to the closing section (5), a push slider (18) being inserted into the sleeve (17), the end of the push slider (18) facing the sleeve (17) being tapered, a through groove (20) being provided on the sleeve (17), a locking plate (19) being slidably connected in the through groove (20), the end of the locking plate (19) facing the push slider (18) being inclined, and the push slider (18) abutting against the inclined surface of the locking plate (19); The through groove (20) is provided with a locking hole on the outside, and the locking hole is provided on the fitting groove (4).

2. The quick-installation joint structure for steel structures according to claim 1, characterized in that: The fitting groove (4) is adapted to the surface curvature of the closing section (5).

3. The quick-installation joint structure for steel structures according to claim 1, characterized in that: The sleeve (17) is provided with a first elastic element (21), and a connecting box (22) is fixedly connected to the first elastic element (21). The connecting box (22) is provided with a second elastic element (24), one end of the second elastic element (24) is connected to the inner wall of the connecting box (22), and the other end of the second elastic element (24) is connected to a linkage slider (23). The linkage slider (23) is slidably connected to the connecting box (22). The linkage slider (23) partially penetrates the connecting box (22), and the linkage slider (23) located outside the connecting box (22) is fixedly connected to the card plate (19).

4. The quick-installation joint structure for steel structures according to claim 3, characterized in that: The sleeve (17) is provided with a limiting post (30), and a receiving frame plate (42) is fixedly connected to the limiting post (30). A fixing frame (29) is fixedly connected to the receiving frame plate (42). A ratchet (27) and a gear (28) are coaxially rotatably connected inside the fixing frame (29). The fixed frame (29) is provided with a third elastic element (25), the two ends of the third elastic element (25) are fixedly connected to the fixed frame (29) and the push slider (18) respectively, and the third elastic element (25) is located in the limiting groove provided in the push slider (18). A rack (26) is fixedly connected in the limiting groove, and the rack (26) meshes with the gear (28).

5. A quick-installation steel structure node structure according to claim 4, characterized in that: A sealing groove (33) is provided inside the limiting post (30), and a sealing sliding pad (32) is slidably connected inside the sealing groove (33). A fourth elastic element (34) is provided between the bottom of the sealing sliding pad (32) and the sealing groove (33). The two ends of the fourth elastic element (34) are fixedly connected to the sealing sliding pad (32) and the sealing groove (33) respectively. A limiting sliding plate (35) is fixedly connected on the sealing sliding pad (32), and the limiting sliding plate (35) penetrates the supporting frame plate (42). The sealing groove (33) on the side of the sealing sliding pad (32) away from the fourth elastic element (34) is connected to the outside through the through hole (31); A fixed connecting block (41) is fixedly connected to the receiving frame plate (42), and a mounting plate (36) is slidably connected to the receiving frame plate (42). Movable connecting blocks (39) are fixedly connected to both sides of the mounting plate (36), and the movable connecting blocks (39) and the fixed connecting blocks (41) are connected by a fifth elastic element (40). The limiting sliding plate (35) abuts against the side wall of the mounting plate (36); A connecting frame (38) is fixedly connected to the mounting plate (36), and a clamping plate (37) is rotatably connected to the connecting frame (38) via a shaft. The clamping plate (37) is engaged with a ratchet (27). A torsion spring is provided on the shaft connecting the card plate (37) and the connecting frame (38).

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