Pipeline sealing connection structure with two-way bearing plug

Abstract

The invention discloses a pipeline sealing connection structure with a bidirectional bearing plug, and relates to the field of pipeline sealing welding, the pipeline sealing connection structure comprises pipeline main bodies which are arranged at the two ends and need to be connected, the surfaces of the pipeline main bodies on the two sides are sleeved with clamping plates used for oppositely moving for clamping, and a threaded column for providing supporting and moving force is arranged between the clamping plates; transmission outer rings used for receiving thrust are inserted in the positions, between the clamping plates, of the surfaces of the pipeline bodies on the two sides, supporting ring bodies used for increasing pressure are fixedly arranged between the surfaces of the pipeline bodies and the transmission outer rings, and sealing middle rings are arranged in the positions, between the transmission outer rings, of the surfaces of the pipeline bodies on the two sides; the sealing middle ring and the transmission outer ring are connected in a sleeved mode to keep pipeline sealing and facilitate welding operation. And abutting inner rings are inserted between the sealing middle rings on the inner walls of the pipeline main bodies on the two sides. The pipeline is connected in a sealed mode by combining welding and threaded connection modes, the sealing performance and stability are guaranteed, and the pipeline connector is effectively suitable for different installation scenes.

Description

Technical Field

[0001] The present invention relates to the field of pipeline seal welding, and in particular to a pipeline seal connection structure with a two-way receiving plug. Background Art

[0002] In various industrial, construction, and municipal pipeline systems, the connection between pipelines is indispensable. For example, in petrochemical, food processing, aerospace, etc., these fields have extremely high requirements for the sealing and stability of pipeline connections. For example, equipment such as compressors and induced draft fans will generate large vibrations during operation, interfering with the stability of pipelines. Also, when transporting chemical gases, liquids, etc., to avoid leakage, the sealing performance needs to be ensured. However, the existing pipeline seal connection structures usually use single welding or threaded connections to ensure pipeline connection. As a result, in the complex chemical engineering field with a complex application environment, they cannot effectively correspond to different installation scenarios and play their corresponding roles. Summary of the Invention

[0003] In order to improve the problem that the installation method of the existing conventional pipeline seal connection structure is single, cannot ensure both sealing and stability at the same time, and thus cannot adapt to different installation scenarios and has poor applicability, the present invention provides a pipeline seal connection structure with a two-way receiving plug.

[0004] The pipeline seal connection structure with a two-way receiving plug provided by the present invention adopts the following technical solution: A pipeline seal connection structure with a two-way receiving plug includes pipeline bodies to be connected at both ends. Clamping plates for moving towards each other for clamping are sleeved on the surfaces of both sides of the pipeline bodies, and threaded columns for providing support and moving force are arranged between the clamping plates; Drive outer rings for receiving thrust are inserted on the surfaces of both sides of the pipeline bodies between the clamping plates. Support ring bodies for increasing pressure are fixedly arranged between the surfaces of the pipeline bodies and the drive outer rings. Seal middle rings are arranged between the drive outer rings on the surfaces of both sides of the pipeline bodies. The seal middle rings are sleeved and connected with the drive outer rings for maintaining pipeline sealing and facilitating welding operations; Inner abutting rings are inserted between the seal middle rings on the inner walls of both sides of the pipeline bodies. Extrusion baffles for facilitating the deformation and squeezing of the pipeline are arranged on the surfaces of the inner abutting rings between the side surfaces of the pipeline bodies on both sides.

[0005] By adopting the above technical solution, the movement of the clamping plates causes the two drive outer rings to move towards each other, thereby splicing the two seal middle rings. And the connection stability is increased by the splicing method, and an operation space is provided for welding, improving the brazing welding effect. At the same time, the pipeline bodies are extruded, and in cooperation with the deformation of the inner abutting rings, the connection part between the pipeline bodies and the seal connection structure is in a zigzag state, effectively ensuring the sealing of the pipeline connection.

[0006] Preferably, the two middle sealing rings include middle ring bodies inserted on the surface of the pipeline main body. On the opposite sides of the two middle ring bodies, a plurality of welding blocks are arranged in a surrounding manner, and the plurality of welding blocks are distinguished by the two middle ring bodies. A movable cavity communicating with the outside is opened inside each of the two groups of welding blocks. On the opposite sides of the inner walls of the two movable cavities, a moving groove is opened. On the opposite side surfaces of the welding blocks on the surface of the two middle ring bodies, a limiting convex block is protrudingly arranged.

[0007] By adopting the above technical solution, the two groups of welding blocks are spliced and fixed to connect the two middle ring bodies. At the same time, with the cooperation of the limiting convex blocks inserted into the moving grooves, the stability is improved, so that welding points are formed at both ends of the splicing point of the two groups of welding blocks, and brazing operation is carried out in the groove between the middle ring body and both sides of the welding point, which is convenient for personnel to weld and effectively improves the welding stability.

[0008] Preferably, a pressing block is movably arranged in each of the two groups of movable cavities. The middle part of the pressing block is open, and a contact surface for contacting the pipeline is communicated and opened at the bottom of the opening. A first compression torsion spring connected to the top of the inner wall of the movable cavity is connected to the top of each of the two groups of pressing blocks. A moving block is movably arranged in each of the two groups of moving grooves. A second extension torsion spring connected to the side wall of the moving groove is connected to the side surface of each of the two groups of moving blocks. A plurality of the pressing blocks and the moving blocks are inserted into each other one by one.

[0009] By adopting the above technical solution, the moving block is pressed into the moving groove to cancel the clamping of the pressing block, so that the first compression torsion spring is extended, and the pressing block is pushed from the movable cavity into the fixed cavity, so that the contact surface is pressed against the deformed part of the pipeline, thereby forming the fixation of the pipeline main body.

[0010] Preferably, on the opposite side surfaces of the two middle ring bodies and between a plurality of welding blocks, a limiting groove is opened, and a plurality of limiting convex blocks on the two middle ring bodies aligned with the plurality of limiting grooves are movably inserted.

[0011] By adopting the above technical solution, a plurality of welding blocks are inserted into the limiting grooves of the other middle ring body to form a state in which the two middle ring bodies are inserted and spliced with each other, and welding points are formed through the state of tooth surface splicing, which is convenient for personnel to weld and improves the welding stability at the same time.

[0012] Preferably, on the opposite side surfaces of the plurality of welding blocks, an auxiliary groove for filling brazing flux is opened.

[0013] By adopting the above technical solution, the auxiliary groove is opened on the opposite side of the welding block. When the two welding blocks are spliced together, the bottom gap connection on the opposite side of the two welding blocks is the welding point. As the operator uses the brazing rod to weld the welding point, the brazing flux in the auxiliary groove flows out to assist the brazing operation. At the same time, the welded part is extended to the range of the auxiliary groove, improving the welding stability.

[0014] Preferably, the two transmission outer rings include outer ring bodies inserted on the surface of the pipeline body. On the side of the two outer ring bodies facing the clamping plate, force-receiving rings are fixedly provided. On the surface of the two force-receiving rings away from the clamping plate, a plurality of linkage rods for connecting the sealing middle rings are fixedly provided.

[0015] By adopting the above technical solution, the force-receiving ring abuts against the clamping plate, thereby receiving the thrust from the clamping plate and transmitting it to the outer ring body, thereby driving the two outer ring bodies to move towards each other. As the outer ring body moves, the linkage rods are driven to move synchronously, thereby transmitting the thrust.

[0016] Preferably, on the surface of the two outer ring bodies away from the clamping plate, tapered push blocks are connected and arranged. The surfaces of the two tapered push blocks are both in contact with the inclined surface, and the hardness of the two tapered push blocks is less than that of the middle ring body.

[0017] By adopting the above technical solution, the tapered push block is pushed by the outer ring body and moves between the inclined surface and the pipeline body. As the tapered push block moves to the position where it abuts against the inclined surface, it pushes the middle ring body to move. Also, when the two middle ring bodies abut against each other, a downward pressure is applied to the surface of the pipeline body, causing deformation.

[0018] Preferably, at the positions of the bottoms of the plurality of limiting grooves where the linkage rods are located, first communication holes are opened. On the side surfaces of the multi-group limiting protrusions at the positions of the linkage rods, second communication holes communicating with the movable cavity are opened. The first communication hole in the middle ring body is aligned and communicated with the second communication hole in the other middle ring body.

[0019] By adopting the above technical solution, the opening of the first communication hole provides space for the insertion of the linkage rod into the middle ring body, making the outer ring body and the middle ring body longitudinally synchronous as a whole. At the same time, the second communication hole is aligned and communicated with the first communication hole, enabling the linkage rod to be inserted from one middle ring body into the other middle ring body, forming the mutual insertion and synchronization of the two middle ring bodies. While improving the overall stability, it receives the thrust transmitted by the outer ring body.

[0020] Preferably, at the positions of the two middle ring bodies where the limiting protrusions are inserted into the bottoms of the limiting grooves, fixed cavities are opened. The bottom of the inclined surface of the inclined surface penetrates the side wall and communicates with the fixed cavity.

[0021] By adopting the above technical solution, the opening of the fixed cavity provides an expansion space for the deformed part of the pipeline main body. At the same time, the lower pressing block presses down from the fixed cavity to fix the deformed part of the pipeline main body, compresses the gap between the pipeline main body and the abutting inner ring, and further improves the overall stability and sealing performance.

[0022] Preferably, inclined inlets are arranged on both sides of the inner wall of the abutting inner ring, and the inclined ends of the inclined inlets are attached to the inner wall of the pipeline main body, so as to facilitate deformation and expansion to improve the sealing performance.

[0023] By adopting the above technical solution, the abutting inner ring is located inside two pipeline main bodies to form a support. At the same time, the opening of the inclined inlet enables the inclined inlet to be in an expanded state to further press against the inner wall of the pipeline main body when the pipeline main body applies pressure to the surface of the abutting inner ring, thereby improving the sealing performance.

[0024] In summary, the present invention includes at least one of the following beneficial technical effects: 1. Using the conical push block to apply a thrust to the middle ring main body, so that the welding blocks on both sides are spliced into a ring shape. At the same time, the limiting convex block is inserted into the limiting groove of another middle ring main body to form an interconnection, improving the connection stability of the middle ring main body while increasing the area of the weldable gap, and cooperating with the brazing process for the gap and both sides of the ring, thereby improving the welding quality and overall improving the stability of the sealed connection structure to prevent loosening problems caused by the shaking of external equipment. 2. With the help of the force-bearing ring to push the conical push block to transmit thrust to the middle ring main body. At the same time, after the middle ring main body is spliced, continuous transmission of thrust generates an interaction force to deform the pipeline main body and the abutting inner ring. The deformed pipeline main body is pressed into the fixed cavity and is fixed by the extrusion of the lower pressing block. Cooperating with the deformation of the abutting inner ring to secondarily extrude the inner wall of the pipeline main body, thereby generating a bent connection state and extruding the gap in the connection surface to ensure the sealing effect between the pipelines. Brief Description of the Drawings

[0025] Figure 1 Is a three-dimensional schematic diagram of the present invention; Figure 2 Is an exploded separation diagram of the present invention; Figure 3 Is a front view sectional view of the present invention; Figure 4 Is a sectional view of the linkage rod insertion of the present invention; Figure 5 Is a structural diagram of the interior of the movable cavity of the present invention; Figure 6 Is a structural diagram of the lower pressing block of the present invention; Figure 7 Is a sectional view of the linkage rod connection of the present invention; Figure 8 Is an extrusion forming diagram at position A of the present invention.

[0026] Reference numerals: 1. pipe body; 2. clamping plate; 3. threaded column; 4. Transmission outer ring; 41. Outer ring body; 42. Force ring; 43. Conical push block; 44. Linkage rod; 5. Sealing middle ring; 51. Middle ring body; 52. Welding block; 53. Active cavity; 54. Moving groove; 55. Limiting groove; 56. Inclined surface; 57. Pressing block; 58. First compression torsion spring; 59. Abutting surface; 510. Moving block; 511. Second extension torsion spring; 512. Auxiliary groove; 513. Limiting convex block; 6. Abutting the inner ring; 7. Extrusion baffle; 8. Inclined inlet; 9. Supporting ring body; 10. First communicating hole; 11. Fixed cavity; 12. Second communicating hole. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 - Figure 8 The present invention is described in further detail.

[0028] The embodiment of the invention discloses a pipeline sealing connection structure with a two-way socket plug.

[0029] Reference Figures 1 - 4 A pipeline sealing connection structure with a two-way socket plug includes a pipeline body 1 arranged on the left and right sides and connected to an external transmission device. The pipeline body 1 is made of rubber material and is used to withstand the corrosion of chemical fluids. At the same time, it has good deformation and pressure resistance. The inner surfaces of the two pipeline bodies 1 are plugged with abutment inner rings 6. The surface of the abutment inner ring 6 is protruding at the position between the two pipeline bodies 1. The two sides of the surface of the extrusion baffle 7 are inclined inward. The middle part of the surface of the two pipeline bodies 1 is surrounded by a clamping plate 2. The surfaces of the two clamping plates 2 are connected to a plurality of threaded columns 3 around the pipeline body 1. The plurality of threaded columns 3 are threadedly connected to the two clamping plates 2; The through surfaces of the threaded column 3 located on the opposite sides of the two clamping plates 2 are threadedly connected with nuts and washers, so that the two clamping plates 2 can move toward and away from each other by turning the nuts. The surface of the pipe body 1 is located between the two clamping plates 2 and is surrounded by two transmission outer rings 4. The transmission outer ring 4 includes an outer ring body 41 sleeved on the surface of the pipe body 1. The two outer ring bodies 41 are fixed with force rings 42 on one side facing the adjacent clamping plates 2. The force ring 42 surrounds the pipe body 1 as a whole, and the opposite sides of the two force rings 42 are in contact with the clamping plates 2. Conical push blocks 43 are bonded to the opposite sides of the two outer ring bodies 41. The conical push blocks 43 and the outer ring bodies 41 can be disassembled and replaced, and the conical push blocks 43 are made of hard polyurethane material, which has a higher hardness than the pipe body 1 and can be deformed under pressure.

[0030] It should be noted that a plurality of linkage rods 44 are fixedly arranged around the pipe body 1 on the surfaces of the two force-receiving rings 42 on the opposite sides (the length of the linkage rod 44 is adjusted according to the length of the part of the pipe body 1 inserted into the connection structure), and the longitudinal angles between the two force-receiving rings 42 are staggered by 30°, so that the linkage rods 44 on both sides are synchronously staggered. A gap of 2-3 cm is reserved between the inner wall of the clamping plate 2 and the outer surface of the pipe body 1. The inner wall surface of the outer ring body 41 is movably inserted into the outer surface of the pipe body 1. And a support ring body 9 with a thickness of 2-3 cm is fixedly arranged on the outer surface of the pipe body 1 at the protruding part of the outer ring body 41 and the conical push block 43. The support ring body 9 is made of rigid polyvinyl chloride material and has good hardness to play a supporting role.

[0031] Referring to Figure 2 、 Figure 3 、 Figure 5 , sealing middle rings 5 are arranged around the surfaces of the two pipe bodies 1 at the end positions of the conical push blocks 43. The two sealing middle rings 5 include middle ring bodies 51 sleeved on the surfaces of the pipe bodies 1. On one side of the two middle ring bodies 51 close to an adjacent outer ring body 41, a plurality of first communication holes 10 are opened. A plurality of first communication holes 10 are movably inserted into the linkage rods 44, and a plurality of first communication holes 10 penetrate through the other side surface of the middle ring body 51 to form a connection. At the positions where the two middle ring bodies 51 are opposite to each other and aligned with the plurality of first communication holes 10, limiting grooves 55 are opened inwards. The bottom of the limiting groove 55 is communicated with the first communication hole 10. At the same time, the inner wall of the middle ring body 51 at the position of the conical push block 43 is provided with an inclined surface 56 around it. The inclined surface 56 has the same angle as the conical inclined surface of the conical push block 43. And the inclined surface 56 is made of nylon plus glass fiber material, which has a hardness greater than that of the conical push block 43 and has good wear resistance at the same time; On the opposite sides of the two middle ring bodies 51, welding blocks 52 (the number of welding blocks 52 is at least six) are protrudingly arranged between the plurality of limiting grooves 55. And the two middle ring bodies 51 are in a staggered state of 30°, so that the welding blocks 52 on the surfaces of the two middle ring bodies 51 can be spliced together to form an integral body. The welding blocks 52 are aligned with the limiting grooves 55 of the other middle ring body 51 and have the same width. And a limiting convex block 513 is protrudingly arranged at the end of the welding block 52, so that the limiting convex block 513 can be movably inserted into the limiting groove 55. At the same time, second communication holes 12 are penetrated through the surfaces of the limiting convex blocks 513 at the positions of the first communication holes 10 of the other middle ring body 51, so that a plurality of second communication holes 12 are centered and aligned with the first communication holes 10 one by one.

[0032] It should be noted that under normal conditions, the two clamping plates 2 are in a relaxed state, leaving a space of 10-15 cm between the two middle ring bodies 51, which facilitates the subsequent movement and splicing actions of the two middle ring bodies 51 driving the welding blocks 52 on both sides. At the same time, annular auxiliary grooves 512 are inwardly formed on the opposite sides of the two welding blocks 52, and brazing fluxes for assisting welding work are filled in the auxiliary grooves 512.

[0033] Refer to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 In multiple welding blocks 52, activity cavities 53 are formed inside. The bottom of the activity cavity 53 penetrates through the inclined surface 56 to communicate with the outside. A pressing block 57 is connected and arranged in the activity cavity 53. The pressing block 57 is generally in a mouth shape, and abutting surfaces 59 are arranged at both ends of the bottom of the mouth shape. The material of the abutting surface 59 is the same as that of the inclined surface 56. On the other side of the pressing block 57 away from the abutting surface 59, a first compression torsion spring 58 is fixedly arranged. The other end of the first compression torsion spring 58 away from the pressing block 57 is fixedly connected to the top of the inner wall of the activity cavity 53, thereby providing power for the movement of the pressing block 57 and maintaining the connection between the pressing block 57 and the welding block 52. At the same time, a moving groove 54 is formed again on one side of the inner wall of the activity cavity 53. A moving block 510 is movably arranged in the moving groove 54. A slope is arranged on the side of the moving block 510 facing the pressing block 57. Under normal conditions, the moving block 510 is located within the mouth shape range of the pressing block 57, thereby transversely clamping the pressing block 57 to form longitudinal limitation. On the other side of the moving block 510 away from the pressing block 57, a second extension torsion spring 511 is fixedly arranged. The other end of the second extension torsion spring 511 away from the moving block 510 is fixedly connected to the inner wall of the moving groove 54.

[0034] It should be noted that under normal conditions, the first compression torsion spring 58 is in a contracted state, the second extension torsion spring 511 is in an expanded state, and the expansion force of the second extension torsion spring 511 is greater than the resilience of the first compression torsion spring 58. The calculation formula for the torsion spring force is F = kx, where F represents the torsion spring force, k represents the torsion spring constant (the elastic force generated by the torsion spring under force per unit length), and x represents the torsion spring compression amount (the displacement distance of the torsion spring from the original state to the compressed state). Both the first compression torsion spring 58 and the second extension torsion spring 511 can calculate the elastic force through this formula. When the two middle ring bodies 51 are abutted together, a fixed cavity 11 is formed between the bottom of the welding block 52 and the abutting inner ring 6, thereby providing a fixed space for the insertion of the pipe body 1.

[0035] The implementation principle of a pipeline sealing connection structure with a two-way receiving plug in an embodiment of the present invention is as follows: When using this device, the user inserts the pipeline bodies 1 on both sides into the inner ring of the outer ring body 41 until the support ring body 9 abuts against the convex surface of the conical push block 43. At this time, the nut on the surface of the threaded column 3 is rotated. The nut rotates in a threaded manner, driving the two clamping plates 2 to move towards each other, thereby shortening the distance. During this process, the two clamping plates 2 respectively exert a thrust on the two force-receiving rings 42. The two force-receiving rings 42 drive the two outer ring bodies 41 to move towards each other under the thrust, thereby pushing the two conical push blocks 43 to move on the inclined surface 56 and the surface of the pipeline body 1. At this time, the bottom of the conical push block 43 is supported by the pipeline body 1, continuously transmitting a thrust to the inclined surface 56, thereby driving the two middle ring bodies 51 to move towards each other; As the two middle ring bodies 51 move, the welding blocks 52 on both sides are driven to be spliced with each other to form a ring body, increasing the welding area. And a plurality of limit bumps 513 are inserted into a plurality of limit slots 55 one by one to form a preliminary fixation of the two middle ring bodies 51. And a plurality of linkage rods 44 are inserted into the range of the first communication hole 10. At this time, the rotation of the nut on the threaded column 3 is stopped. The user places the brazing rod for welding operation on both sides of the ring body formed by the welding blocks 52, just covering the connection gap between the two welding blocks 52. Then the user uses welding equipment to perform brazing on the connection gap and the positions of the two welding blocks 52, thereby fixing the two middle ring bodies 51 together to form a secondary fixation, improving the overall stability of the connection structure and effectively preventing loosening; Then continue to rotate the nut of the threaded column 3 to drive the two conical push blocks 43 to move. At this time, the two middle ring bodies 51 are in a fixed state, so that the thrust of the conical push blocks 43 cannot be released, thereby forming a mutual force and generating extrusion on the conical push blocks 43. And during the extrusion process, it is synchronously conveyed to the surface of the pipeline body 1, causing the surface of the pipeline body 1 to be extruded and deformed. The extruded part is then pushed by the conical push block 43 into the fixed cavity 11 (as shown in Figure 8 ). At this time, due to the extrusion of the conical push block 43, the surface of the abutting inner ring 6 is synchronously subjected to a downward pressure, causing the inclined inlet 8 to expand in a ring shape, extruding the inner wall of the pipeline body 1, and cooperating with the deformation of the pipeline body 1 to generate an overall bending state, extruding the gap between the pipeline body 1 and the middle ring body 51 and the abutting inner ring 6, and finally forming a sealing effect; During the secondary movement of the force-receiving ring 42, a thrust is exerted on the linkage rod 44, causing the linkage rod 44 to be inserted into the second communication hole 12 and thus exert a thrust on the surface of the moving block 510, pushing the moving block 510 out of the mouth-shaped range of the lower pressing block 57. At this time, the lower pressing block 57 loses the limit of the moving block 510, causing the first compression torsion spring 58 to rebound, thereby pushing the lower pressing block 57 out of the movable cavity 53 and performing secondary extrusion on the pipeline body 1 extruded in the fixed cavity 11, thereby improving the sealing effect.

[0036] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, various modifications and changes can be made to the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A pipeline sealing connection structure with a two-way socket plug, characterized in that: It comprises a pipe body (1) arranged at both ends to be connected, the surfaces of the pipe body (1) on both sides are sleeved with clamping plates (2) for moving towards each other for clamping, and threaded columns (3) are arranged between the clamping plates (2) to provide support and moving force; A transmission outer ring (4) for receiving thrust is inserted and arranged on the surface of the pipeline body (1) on both sides between the clamping plates (2), a support ring body (9) for increasing pressure is fixedly arranged between the surface of the pipeline body (1) and the transmission outer ring (4), and a sealing middle ring (5) is arranged on the surface of the pipeline body (1) on both sides between the transmission outer ring (4), and the sealing middle ring (5) is sleeved and connected with the transmission outer ring (4) to maintain pipeline sealing; An abutting inner ring (6) is inserted and arranged between the inner walls of the pipeline body (1) on both sides and between the sealing middle ring (5); and an extrusion baffle (7) is arranged on the surface of the abutting inner ring (6) between the side surfaces of the pipeline body (1) on both sides to facilitate the deformation and squeezing of the pipeline.

2. A pipeline sealing connection structure with a two-way socket plug according to claim 1, characterized in that: The two sealing middle rings (5) comprise a middle ring body (51) inserted and arranged on the surface of the pipe body (1); a plurality of welding blocks (52) are arranged around opposite sides of the two middle ring bodies (51); and the plurality of welding blocks (52) are distinguished by the two middle ring bodies (51); movable cavities (53) communicating with the outside are provided inside the two groups of welding blocks (52); movable grooves (54) are provided on opposite sides of the inner walls of the two groups of movable cavities (53); and limiting protrusions (513) are protruded from opposite sides of the surfaces of the welding blocks (52) on the surfaces of the two middle ring bodies (51).

3. A pipeline sealing connection structure with a two-way socket plug according to claim 2, characterized in that: A pressing block (57) is movably arranged in both groups of the movable chambers (53); the pressing block (57) has an opening in the middle and a contact surface (59) for contacting the pipeline is provided at the bottom of the opening; the tops of the pressing blocks (57) are connected to a first compression torsion spring (58) fixedly connected to the top of the inner wall of the movable chamber (53); a moving block (510) is movably arranged in both groups of the movable grooves (54); the side surfaces of the moving blocks (510) are connected to a second extension torsion spring (511) fixedly connected to the side wall of the movable groove (54); and the plurality of pressing blocks (57) are plugged into the moving blocks (510) one by one.

4. A pipeline sealing connection structure with a two-way socket plug according to claim 3, characterized in that: Limiting grooves (55) are provided on opposite side surfaces of the two middle ring bodies (51) and between the plurality of welding blocks (52), and the plurality of limiting grooves (55) of the middle ring body (51) and the plurality of limiting protrusions (513) aligned with the other middle ring body (51) are movably plugged.

5. A pipeline sealing connection structure with a two-way socket plug according to claim 4, characterized in that: Auxiliary grooves (512) for filling brazing flux are provided on the surfaces on the opposite sides of the plurality of welding blocks (52).

6. A pipeline sealing connection structure with a two-way socket plug according to claim 5, characterized in that: The two transmission outer rings (4) comprise an outer ring body (41) inserted into the surface of the pipe body (1), a force ring (42) is fixedly provided on one side of the two outer ring bodies (41) facing the clamping plate (2), and a plurality of linkage rods (44) for connecting to the sealing middle ring (5) are fixedly provided on one side of the two force rings (42) away from the clamping plate (2).

7. A pipeline sealing connection structure with a two-way socket plug according to claim 6, characterized in that: A conical push block (43) is connected to the surface of one side of the two outer ring bodies (41) away from the clamping plate (2), and the surfaces of the two conical push blocks (43) are in contact with the inclined surface (56). The hardness of the two conical push blocks (43) is smaller than that of the middle ring body (51).

8. A pipeline sealing connection structure with a two-way socket plug according to claim 7, characterized in that: A plurality of the limiting grooves (55) are provided with first connecting holes (10) at their bottoms located at the linkage rod (44), a plurality of the limiting protrusions (513) are provided with second connecting holes (12) connected to the movable cavity (53) at their side surfaces located at the linkage rod (44), and the first connecting holes (10) in the middle ring body (51) are aligned and connected to the second connecting holes (12) of another middle ring body (51).

9. A pipeline sealing connection structure with a two-way socket plug according to claim 8, characterized in that: The two middle ring bodies (51) are provided with a fixing cavity (11) at the bottom of the limiting groove (55) where the limiting protrusion (513) is inserted, and the bottom of the inclined surface (56) passes through the side wall and is in communication with the fixing cavity (11).

10. A pipeline sealing connection structure with a two-way socket plug according to claim 1, characterized in that: Inclined inlets (8) are provided on both sides of the inner wall of the abutting inner ring (6), and the inclined ends of the inclined inlets (8) fit with the inner wall of the pipe body (1) to facilitate deformation and expansion and improve sealing performance.

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