Air-tight seal buckle connecting structure

Abstract

The invention relates to the technical field of pipeline connection, and discloses an air-tight seal buckle connecting structure which comprises a base provided with mounting grooves and two locking mechanisms connected through a connecting set, threaded connecting grooves are formed in the circumferential inner walls of the two mounting grooves, and the air-tight seal buckle connecting structure is connected with pipelines at the corresponding positions through the threaded connecting grooves. The locking mechanism comprises an auxiliary part, the connecting set is driven to move through the auxiliary part, and therefore the connecting stability and the sealing performance between the pipeline and the base are improved. The air-tight seal buckle connecting structure can effectively solve the problems that in the prior art, along with long-time use, under the environment of continuous high pressure and alternating load, the seal face and the thread part of the seal buckle can be gradually abraded and subjected to stress relaxation, so that mechanical damage of the seal buckle is caused, the original seal contact pressure is reduced, and the service life of the seal buckle is prolonged. And a tiny leakage channel is formed, so that the oil and gas exploitation efficiency can be reduced, and safety accidents can be caused when the oil and gas exploitation efficiency is serious.

Description

Technical Field

[0001] This invention relates to the field of pipe connection technology, and more specifically to an airtight snap-fit ​​connection structure. Background Technology

[0002] In the exploration and extraction of resources such as oil and natural gas, oil well pipelines constitute the core channel from underground reservoirs to the surface. In order to ensure the structural integrity and functional effectiveness of the tubing string, the connectors between adjacent pipelines are crucial. They not only need to have sufficient mechanical strength to ensure the stability of the connection, but also provide reliable sealing performance to prevent high-pressure fluids inside the wellbore from leaking outwards.

[0003] Existing sealing buckle connection structures mainly rely on threaded fastening and metal sealing. Threaded fastening provides the main tensile strength and torque transmission capability for the connection through the engagement of male and female threads, while metal sealing usually achieves microscopic contact between metals under the action of upper buckle pre-tightening force by designing special sealing surfaces at the connection end faces, thereby forming a sealing barrier.

[0004] However, in practical applications, oil well pipelines typically need to extend hundreds or even thousands of meters underground. The tubing string must withstand enormous internal fluid pressure, as well as external formation pressure, its own weight, and complex stress. Therefore, with prolonged use, under the combined effects of continuous high pressure, alternating loads, and corrosive media, the sealing surface and threaded parts of the sealing ring will gradually wear down and experience stress relaxation, leading to mechanical damage to the sealing ring. This, in turn, reduces the original sealing contact pressure, creating tiny leakage channels. This not only reduces the efficiency of oil and gas extraction but can also cause safety accidents in severe cases. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a gas-tight buckle connection structure that effectively solves the problem that, with prolonged use under continuous high pressure, alternating loads, and corrosive media, the sealing surface and threaded portion of the buckle gradually wear and experience stress relaxation, leading to mechanical damage to the buckle. This, in turn, reduces the original sealing contact pressure, creating tiny leakage channels. Consequently, this not only reduces oil and gas extraction efficiency but can also cause safety accidents in severe cases.

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

[0007] This invention provides an airtight snap-fit ​​connection structure, comprising:

[0008] The base has mounting grooves at two far apart ends.

[0009] The locking mechanism is provided with two, the two locking mechanisms are connected through a plurality of connection groups distributed in the circumferential direction on the side wall close to each other.

[0010] The circumferential outer wall of the base is provided with two sliding groove groups distributed in the front-back direction, and the circumferential inner wall of the two mounting grooves is provided with a threaded connecting groove, which is connected with the corresponding position of the pipeline through the threaded connecting groove.

[0011] The locking mechanism includes an auxiliary member provided on the circumferential outer wall of the base, which drives the connection group to move, thereby improving the connection stability and sealing between the pipeline and the base.

[0012] Further, each sliding groove group includes a plurality of guide grooves, and the connection group includes a plurality of sliding rods arranged in the corresponding position inside the guide groove. The circumferential outer wall of the sliding rod is slidably sleeved with a supporting block, and the two ends of the supporting block are connected with the inner wall of the guide groove through the top spring. A plurality of supporting blocks are also provided with a cooperating member.

[0013] Further, a plurality of avoidance grooves with threaded grooves on the inner wall are provided on the base in the circumferential direction. The avoidance grooves are slidably provided with a pushing block inside.

[0014] Further, the cooperating member includes two support discs connected with the front and rear direction of a plurality of supporting blocks, respectively. The two support discs are provided with a plurality of sets of locking plates on the side close to each other in the circumferential direction. Each set of locking plates is composed of two locking plates, and the end of each set of locking plates away from each other is connected with different support discs, respectively.

[0015] Further, the end face of each set of locking plates is provided with a plurality of through holes in the front-back direction. The through holes on different locking plates are concentric and coaxial. In the initial state, the inside of the through hole is provided with a threaded rod connected with the avoidance groove.

[0016] Further, the auxiliary member includes an adjusting seat rotatably connected with the support disc and provided with a threaded matching groove on the circumferential inner wall. The inner wall of the adjusting seat is provided with a sealing plate connected with the supporting block through a plurality of connecting blocks.

[0017] Further, the inner side close to each other of the two mounting grooves is provided with a mounting ring groove, and the inner side close to each other of the two mounting ring grooves is provided with a clamping plate. The end face of the clamping plate is provided with a plurality of guide rods with chamfered corners in the circumferential direction. The guide rod is slidably penetrated through the base and connected with the mounting ring groove through the reset spring. In the initial state, the guide rod is located inside the avoidance groove.

[0018] Further, the end close to the center of the base of the pushing block is provided as an inclined surface, and the other end of the pushing block is connected with the threaded rod.

[0019] The technical scheme provided by the present application has the following beneficial effects compared with the prior art:

[0020] When initially connected, the spherical sealing ring on the pipeline is extruded into the trapezoidal groove of the sealing plate to form a first sealing, at the same time, the trapezoidal clamping block on the pipeline is embedded into the trapezoidal groove of the clamping plate to form a second sealing, then, when the adjusting seat is rotated, it drives the sealing plate to move axially to exert greater pressure on the sealing ring to force the contact surface of the sealing ring to plastically deform to form a third sealing, finally, in the locking stage, the threaded rod pushes the abutting block to further drive the clamping plate to press the trapezoidal clamping block again, so that the contact surface of the trapezoidal clamping block is also plastically deformed to form a fourth sealing, the synergistic effect of the multiple sealing from elastic sealing to plastic deformation is progressive, which ensures that the sealing performance of the connection is far superior to the traditional single sealing mode, it can not only effectively prevent leakage under normal pressure, but also can cope with harsh working conditions such as high pressure, vibration and temperature change, greatly improving the safety and reliability of the pipeline system. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the base of the embodiment of the present application;

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the base and the pipeline of the embodiment of the present application;

[0024] Figure 3 is a schematic diagram of the plane structure of the embodiment of the present application;

[0025] Figure 4 is a schematic diagram of the three-dimensional structure of the connecting group and the auxiliary part of the embodiment of the present application;

[0026] Figure 5 is a schematic diagram of the three-dimensional structure of the sealing plate after being cut of the embodiment of the present application;

[0027] Figure 6 is a schematic diagram of the three-dimensional structure of the base, the sliding rod and the supporting block of the embodiment of the present application;

[0028] Figure 7 is a schematic diagram of the three-dimensional structure of the fitting part of the embodiment of the present application;

[0029] Figure 8 is a schematic diagram of the three-dimensional structure of the clamping plate after being cut of the embodiment of the present application;

[0030] Figure 9 The schematic view of the three-dimensional structure of the clamping plate and the mounting ring groove of the embodiment of the present application is separated in three dimensions.

[0031] The reference numbers in the drawings represent: 100, pipeline;

[0032] 1, base; 11, mounting groove; 111, threaded connection groove; 112, mounting ring groove; 12, guide groove; 13, avoiding groove; 14, pushing block; 15, clamping plate; 16, guide rod; 161, chamfer; 17, return spring; 2, locking mechanism; 21, connecting group; 211, sliding rod; 212, supporting block; 213, pressing spring; 214, matching part; 2141, supporting disc; 2142, locking plate; 2143, through hole; 2144, threaded rod; 22, auxiliary part; 221, adjusting seat; 2211, threaded matching groove; 222, sealing plate; 223, connecting block. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] The present application will be further described below with reference to the embodiments.

[0035] Embodiment:

[0036] Please refer to Figure 1 - Figure 9 The present application provides a technical solution: a gas seal buckle connection structure, comprising:

[0037] The base 1 is provided with two mounting grooves 11 at two opposite ends thereof;

[0038] The locking mechanism 2 is provided with two locking mechanisms 2, and the two locking mechanisms 2 are connected through a plurality of connecting groups 21 distributed in the circumferential direction on the side wall close to each other;

[0039] The circumferential outer wall of the base 1 is provided with two sliding groove groups distributed in the front-back direction, and the circumferential inner wall of the two mounting grooves 11 is provided with threaded connection grooves 111, which are connected with the corresponding pipelines 100 through the threaded connection grooves 111;

[0040] The locking mechanism 2 includes an auxiliary component 22 disposed on the outer circumference of the base 1. The auxiliary component 22 drives the connecting assembly 21 to move, thereby improving the connection stability and sealing between the pipe 100 and the base 1.

[0041] Each sliding groove group includes several guide grooves 12, and the connecting group 21 includes several slide rods 211 disposed inside the guide grooves 12 at corresponding positions. The outer circumferential wall of the slide rod 211 is slidably fitted with a support block 212. Both ends of the support block 212 are connected to the inner wall of the guide groove 12 through a top compression spring 213. Several support blocks 212 are also provided with a mating part 214.

[0042] The base 1 has several clearance grooves 13 with threaded grooves on the inner wall along the circumferential direction, and each clearance groove 13 has a sliding push block 14.

[0043] The mating component 214 includes two support plates 2141 that are respectively connected to several support blocks 212 in the front and rear directions. Several sets of locking plates 2142 are arranged along the circumferential direction on the side of the two support plates 2141 that are close to each other. Each set of locking plates 2142 consists of two locking plates 2142, and the ends of each set of locking plates 2142 that are far apart are respectively connected to different support plates 2141.

[0044] Each locking plate 2142 has several through holes 2143 on its end face along the front-back direction. The through holes 2143 on different locking plates 2142 are concentric and coaxial. In the initial state, the through holes 2143 are provided with threaded rods 2144 that are threadedly connected to the relief groove 13.

[0045] The auxiliary component 22 includes an adjustment seat 221 that is rotatably connected to the support plate 2141 and has a threaded groove 2211 on its inner circumference. The inner wall of the adjustment seat 221 is provided with a sealing plate 222, which is connected to the support block 212 through several connecting blocks 223.

[0046] Each of the two mounting slots 11 has a mounting ring groove 112 on one side that is close to each other. Each of the two mounting ring grooves 112 has a clamping plate 15 inside. Each of the two clamping plates 15 has a number of guide rods 16 with chamfered ends 161 on one side that is close to each other along the circumferential direction. The guide rods 16 slide through the base 1 and are connected to the mounting ring groove 112 through a return spring 17. In the initial state, the guide rods 16 are located inside the clearance groove 13.

[0047] One end of the push block 14 near the center of the base 1 is set as an inclined surface, and the other end of the push block 14 is connected to the threaded rod 2144.

[0048] In specific work,

[0049] Existing sealing buckle connection structures mainly rely on threaded fastening and metal sealing. Threaded fastening provides the main tensile strength and torque transmission capability for the connection through the engagement of male and female threads, while metal sealing usually achieves microscopic contact between metals under the action of upper buckle pre-tightening force by designing special sealing surfaces at the connection end faces, thereby forming a sealing barrier.

[0050] However, in practical applications, oil well pipelines 100 typically need to extend hundreds or even thousands of meters underground. The tubing string must withstand enormous internal fluid pressure, as well as external formation pressure, its own weight, and complex stress. Therefore, with prolonged use, under the combined effects of continuous high pressure, alternating loads, and corrosive media, the sealing surface and threaded portion of the sealing buckle will gradually wear and experience stress relaxation, leading to mechanical damage to the sealing buckle. This, in turn, reduces the original sealing contact pressure, creating tiny leakage channels. This not only reduces oil and gas extraction efficiency but can also cause safety accidents in severe cases. Based on this, the gas-tight buckle connection structure, through the cooperation between the connection group 21 and the auxiliary component 22, improves the connection strength and sealing performance between the pipeline 100 and the base 1, ensuring that the pipeline 100 will not leak during long-term operation.

[0051] Specifically, both ends of the base 1 are provided with mounting grooves 11, the inner walls of which are provided with threaded connection grooves 111 (the mounting grooves 11 are ring-shaped, and the pipe 100 has a connecting section with a locking groove on its inner wall corresponding to the mounting grooves 11). When installing the base 1 and the pipe 100, the connecting sections of the two pipes 100 are first screwed into the threaded connection grooves 111 of the mounting grooves 11 on the front and rear sides, thus completing the initial connection between the base 1 and the pipe 100. The inner wall of the adjusting seat 221 is provided with a sealing plate 222 connected to the support block 212 through several connecting blocks 223. After the initial connection between the base 1 and the pipe 100 is completed, the initial sealing is achieved through the cooperation of the sealing plate 222 and the pipe 100 (specifically, two ladders are provided on the side wall of the sealing plate 222 near the pipe 100). The base 1 has two trapezoidal grooves, one near the pipe 100 and the other away from the pipe 100, with the height gradually decreasing. A sealing ring is fixedly installed on the pipe 100 at the position corresponding to the two trapezoidal grooves. The sealing ring has a spherical cross-section. During the connection between the base 1 and the pipe 100, the sealing ring gradually enters the trapezoidal groove, causing the outer wall of the sealing ring to fit tightly against the inner wall of the trapezoidal groove, thus achieving a seal between the base 1 and the pipe 100. A clamping plate 15 is installed in the mounting ring groove 112. A trapezoidal groove, identical to that of the sealing plate 222, is also provided on the side of the plate closest to the pipe 100. A trapezoidal block is installed on the pipe 100 at the position corresponding to the trapezoidal groove. During installation, the trapezoidal block gradually enters the trapezoidal groove at the corresponding position, thereby achieving a further seal between the pipe 100 and the base 1 through the cooperation of the trapezoidal block and the trapezoidal groove.

[0052] Subsequently, the threaded rods 2144 inside the clearance groove 13 are unscrewed one by one (the base 1 has several clearance grooves 13 with threaded grooves on the inner wall along the circumferential direction. In the initial state, the threaded rods 2144 pass through the through hole 2143 of the locking plate 2142 and are threadedly connected to the inside of the clearance groove 13. The threaded rods 2144 are unscrewed from the inside of the clearance groove 13 and disengaged from the through hole 2143). Next, the adjusting seat 221 is rotated (the adjusting seat 221 is rotatably connected to the support plate 2141, while the locking plate 2142 is fixedly connected to the support plate 2141. Therefore, the adjusting seat 221 can move after the threaded rods 2144 are unscrewed). Through the cooperation between the adjusting seat 221 and the pipe 100, the sealing strength and connection stability between the pipe 100 and the base 1 are further improved. Specifically, the outer circumferential wall of the pipe 100 is provided with threaded grooves corresponding to the threaded mating grooves 2211. During the adjustment of the adjusting seat 221, the threaded groove 2211 gradually engages with the threaded slot, and the adjusting seat 221 gradually moves from the initial position toward the pipe 100. During this process, the adjusting seat 221 simultaneously drives the support plate 2141 to move. Since the sealing plate 222 is connected to the support block 212 through several connecting blocks 223, the support plate moves synchronously with the sealing plate 222 (the support block 212 is slidably sleeved on the outer wall of the slide rod 211, and it will gradually compress the top pressure spring 213 during the movement). When the sealing plate 222 moves, the trapezoidal groove on it further contacts the sealing ring set on the pipe 100. The greater pressure forces the contact surface to undergo plastic deformation (non-elastic deformation, which will not rebound and fail). The original micro gaps are "filled" by the deformed metal, and at the same time, the metal molecules generate adsorption force, which ultimately further improves the sealing strength between the pipe 100 and the base 1.

[0053] This method not only improves the sealing strength between the base 1 and the pipe 100, but also achieves a more stable connection effect compared to existing connection methods. Specifically, existing methods typically achieve locking only through the engagement of internal and external threads. However, in this embodiment, not only is the pipe 100 and the base 1 locked by a threaded connection, but also, as the adjusting seat 221 rotates, the threaded groove 2211 on its inner wall gradually screws into the threaded slot on the outer wall of the pipe 100. Thus, relying on the single rotation of the adjusting seat 221 not only simplifies the installation steps and improves the installation efficiency, but also further enhances the connection strength between the base 1 and the pipe 100 by using a synchronous internal and external locking method.

[0054] As the two locking plates 2142 in the same group move along with their respective support plates, the originally concentric and coaxial through holes 2143 will gradually become misaligned. As the two locking plates 2142 continue to move in opposite directions, the different through holes 2143 will re-align and become concentric again. In order to ensure the stability of the adjusting seats 221 on both sides after movement, the threaded rod 2144 that was originally unscrewed is passed through the two through holes 2143 and screwed into the relief groove 13. In this way, the sealing strength between the base 1 and the pipe 100 is further improved through the cooperation of the push block 14 and the guide rod 16.

[0055] Specifically, in its initial state, the guide rod 16 is located inside the clearance groove 13, and the other end of the guide rod 16 is connected to the clamping plate 15. After several threaded rods 2144 and the push block 14 are sequentially screwed into the clearance groove 13 (after the threaded rods 2144 are screwed in, they can effectively prevent the adjusting seat 221 from shifting under pressure during long-term use, thereby improving the connection strength between the adjusting seat 221, the base 1, and the pipe 100), the inclined surface on the push block 14 gradually engages with the chamfer 161 of the guide rod 16. During this process, The guide rod 16 is subjected to a force from above, which is converted into a horizontal force through the chamfer 161, thereby stretching the return spring 17. Under the drive of the guide rod 16, the clamping plate 15 gradually moves towards the trapezoidal clamping block. The trapezoidal groove on the clamping plate 15 applies greater pressure to the trapezoidal clamping block and forces the contact surface here to undergo plastic deformation. The original micro gaps are "filled" by the deformed metal, and at the same time, the metal molecules generate adsorption force (same as the cooperation method between the sealing ring and the trapezoidal groove mentioned above), which ultimately further improves the sealing strength between the pipe 100 and the base 1.

[0056] It is worth emphasizing that the micro-concave coating head glue tank based on the quick-load and unload structure has the following main advantages:

[0057] Firstly, during the initial connection, the spherical sealing ring on the pipe 100 is squeezed into the trapezoidal groove of the sealing plate 222, forming the first seal. Simultaneously, the trapezoidal locking block on the pipe 100 is embedded in the trapezoidal groove of the clamping plate 15, forming the second seal. Subsequently, when the adjusting seat 221 is rotated, it will drive the sealing plate 222 to move axially, applying greater pressure to the sealing ring and forcing it to undergo plastic deformation at the contact surface with the trapezoidal groove, forming the third seal. Finally, during the locking stage, the threaded rod 2144 pushes the push block 14, which in turn drives the clamping plate 15 to apply pressure to the trapezoidal locking block again, causing its contact surface to undergo plastic deformation, forming the fourth seal. This multi-seal synergy, from elastic sealing to plastic deformation, ensures that the sealing performance at the connection is far superior to the traditional single-seal method. It can not only effectively prevent leakage under normal pressure, but also cope with harsh working conditions such as high pressure, vibration, and temperature changes, greatly improving the safety and reliability of the pipe 100 system.

[0058] Secondly, the locking mechanism of this structure has dual protection. The connecting section of the pipe 100 is screwed into the threaded connection groove 111 of the mounting groove 11 of the base 1 through the external thread, realizing the basic internal and external thread connection. When the adjusting seat 221 is rotated, the threaded mating groove 2211 on its inner wall will start to engage with the threaded groove on the outer wall of the pipe 100. With the rotation and axial movement of the adjusting seat 221, the internal and external thread structure will be completely locked, which is equivalent to applying strong mechanical constraints to the radial and axial directions of the pipe 100. This design of synchronous internal and external thread locking upgrades the connection from a single thread engagement to a dual composite locking. It not only shares the mechanical stress through two independent thread structures, but also forms a complementary mechanical closed loop. This makes the connection between the pipe 100 and the base 1 have extremely high mechanical stability and strong resistance to pull-out and torsion. Even when the pipe 100 is subjected to strong vibration or external impact, it can ensure that the connection will not loosen or fail, which is far more stable and reliable than the traditional single thread connection method.

[0059] Thirdly, after the initial threaded connection is completed, simply rotating the adjusting seat 221 triggers multiple subsequent steps simultaneously: it drives the engagement of the threaded groove 2211 with the threaded slot (achieving secondary locking), moves the sealing plate 222 axially (achieving deformation sealing), and pushes the support plate 2141 and the locking plate 2142 to move. Finally, simply screwing the threaded rod 2144 back in completes the final locking. This "single drive, multi-step linkage" design is the core of improving installation efficiency. It integrates complex operations that originally required multiple tools and steps (such as tightening bolts in different positions and adjusting sealing gaskets) into a simple rotational action, greatly simplifying the installation process, significantly shortening the time for a single connection, and greatly improving the overall installation and construction efficiency.

[0060] Fourthly, after all adjustments and sealing work is completed, the previously unscrewed threaded rod 2144 is re-passed through the locking plate 2142 through hole 2143, which has been re-aligned due to the movement of the adjusting seat 221, and screwed into the relief groove 13 of the base 1. This operation not only completely fixes the position of the adjusting seat 221, preventing it from rotating due to vibration or pressure changes, but more importantly, the end of the threaded rod 2144 pushes the push block 14. The inclined surface of the push block 14 cooperates with the chamfer 161 of the guide rod 16, converting the downward force of screwing in into a horizontal pulling force. Further pulling the clamping plate 15 to press the trapezoidal block achieves final sealing reinforcement. This mechanical forced locking design provides ultimate assurance for the long-term stability of the connection. The re-screwing of the threaded rod 2144 fundamentally eliminates the risk of loosening of the adjusting seat 221 during long-term operation. The secondary pressure applied to the clamping plate 15 at its end is a "redundant safety" design, ensuring that the sealing performance can be maintained to the maximum extent even under extreme working conditions. This anti-loosening mechanism provides a solid guarantee for the long-term safe operation of the system.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas-tight ferrule connection structure provided at a connection between two pipes, characterized by, The utility model relates to a pipeline connecting device, including: Base (1), two far away one end of the base (1) are provided with mounting groove (11), Locking mechanism (2), the locking mechanism (2) are provided with two, two locking mechanism (2) are connected through a plurality of circumferential direction distribution's connection group (21) one side wall close to each other, Wherein, the circumferential outer wall of base (1) is provided with two along the front and back direction distribution's sliding groove group, the circumferential inner wall of two mounting groove (11) is provided with threaded connection groove (111), is connected through threaded connection groove (111) and corresponding position's pipeline (100), Wherein, the locking mechanism (2) includes the auxiliary part (22) of setting in the circumferential outer wall of base (1), is moved through auxiliary part (22) and drives connection group (21), thereby improve the connection stability and the sealing property between pipeline (100) and base (1).

2. The hermetically sealed clasp connection structure according to claim 1, wherein: Each sliding groove group includes a plurality of guide slots (12), the connection group (21) includes a plurality of sliding rods (211) provided in the corresponding position guide slot (12) inside, the circumferential outer wall of the sliding rod (211) is slidably sleeved with a supporting block (212), both ends of the supporting block (212) are connected with the inner wall of the guide slot (12) through the top pressure spring (213), a plurality of supporting blocks (212) are also commonly provided with a matching part (214).

3. The hermetically sealed clasp connection structure according to claim 1, wherein: The base (1) is provided with a plurality of escape grooves (13) with threaded grooves on the inner wall in the circumferential direction, and a pushing block (14) is slidably arranged in each escape groove (13).

4. The hermetically sealed clasp connection structure according to claim 2, wherein: The matching part (214) includes two support discs (2141) connected with a plurality of supporting blocks (212) in the front and back direction respectively, and a plurality of sets of locking plates (2142) are arranged in the circumferential direction on one side of the two support discs (2141) close to each other, wherein each set of locking plates (2142) is composed of two locking plates (2142), and the ends of each set of locking plates (2142) away from each other are connected with different support discs (2141) respectively.

5. The hermetically sealed clasp connection structure according to claim 4, wherein: The end face of each set of locking plates (2142) is provided with a plurality of through holes (2143) in the front and back direction, the through holes (2143) on different locking plates (2142) are concentric and coaxial, and in the initial state, the inside of the through hole (2143) is provided with a threaded rod (2144) threadedly connected with the escape groove (13).

6. The hermetically sealed clasp connection structure according to claim 4, wherein: The auxiliary part (22) includes an adjusting seat (221) rotatably connected with the support disc (2141) and provided with a threaded matching groove (2211) on the circumferential inner wall, the inner wall of the adjusting seat (221) is provided with a sealing plate (222), and the sealing plate (222) is connected with the supporting block (212) through a plurality of connecting blocks (223).

7. The gas-tight clasp connection structure according to claim 3, characterized by: Two installation grooves (11) are provided with installation ring grooves (112) on one side close to each other, the interiors of two installation ring grooves (112) are provided with clamping plates (15), one side close to each other of two clamping plates (15) is provided with a plurality of guide rods (16) with chamfered end faces (161) in the circumferential direction, the guide rods (16) slide through the base (1) and are connected with the installation ring grooves (112) through return springs (17), in the initial state, the guide rods (16) are located in the avoiding grooves (13).

8. The gas-tight clasp connection structure according to claim 3, characterized by: One end close to the center of the base (1) of the pushing block (14) is provided as an inclined surface and is connected with the threaded rod (2144) at the other end of the pushing block (14).

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