Marine pipeline maintenance mechanical connector

Abstract

The invention relates to the technical field of marine pipeline connection, in particular to a marine pipeline maintenance mechanical connector which comprises a connecting sleeve, an opposite-pulling structure, a sealing structure and a locking structure. The connecting sleeve is provided with a mounting channel allowing the pipeline body to be inserted and fixed, the connecting sleeve sequentially comprises a locking sleeve, a sealing sleeve and a fixing sleeve, and the sealing sleeve and the fixing sleeve are connected in a sliding and inserted mode; when the opposite-pulling structure pulls the locking sleeve and the fixing sleeve to be close to each other, the locking sleeve applies mechanical fastening force to the pipeline body through the locking structure, the sealing sleeve and the fixing sleeve extrude the sealing structure, and the sealing structure is axially compressed to seal a gap between the sealing sleeve and the pipeline body. The mechanical connector is arranged on the to-be-repaired pipeline body in a sleeving mode, and stable mechanical connection and good sealing connection between the mechanical connector and the pipeline body can be achieved by exerting action on the opposite-pulling structure; therefore, a damaged pipeline system in the ocean can be repaired quickly and conveniently.

Description

Technical Field

[0001] This application relates to the technical field of marine pipeline connection, and particularly to a marine pipeline repair mechanical connector. Background Art

[0002] Pipes lined or clad with corrosion-resistant alloy (CRA) are a type of composite steel pipe used in the oil and gas industry, with enhanced corrosion resistance. Such pipes consist of an external carbon steel backing or substrate and an internal corrosion-resistant alloy (CRA) layer or lining. These pipes are mainly applied to the pipeline transportation system in the oil and gas industry, especially in harsh corrosion environments, such as deep-sea oil and gas exploitation; that is, the above pipes are installed in a marine environment for transporting oil or gas.

[0003] When a local break occurs in the above pipes, emergency repair of the pipes is required. In the prior art, the damaged pipe section of the pipe can be first cut off, and then the two sections of the pipe can be newly connected. The connection method of the two sections of the pipe can refer to, for example, a pipeline quick-connect flange disclosed in Patent No. CN201711224312.0; by setting mechanical connectors with flanges at the ends of the two sections of the pipe, and then using a connecting pipe with flanges at both ends to connect the two mechanical connectors, so as to achieve the quick connection of the two sections of the pipe. In the above patent document, the fastening effect between the mechanical connector and the pipe can be achieved by a wedge block between the housing of the mechanical connector and the pipe; that is, the housing of the mechanical connector moves to squeeze the wedge block, so that the housing of the mechanical connector exerts a fastening force on the pipe through the wedge block, making the mechanical connector and the pipe connected as a whole.

[0004] However, due to the static friction connection between the wedge block and the pipe, it is difficult for the housing of the mechanical connector to push the wedge block to fasten the pipe; and when the mechanical connector and the pipe are subjected to external forces, the wedge block is prone to relative sliding with the pipe, thus affecting the mechanical engagement strength between the mechanical connector and the pipe. Summary of the Invention

[0005] In order to facilitate the repair of damaged marine pipelines and improve the mechanical connection strength between the mechanical connector and the pipeline, this application provides a marine pipeline repair mechanical connector.

[0006] A marine pipeline repair mechanical connector provided by this application adopts the following technical solutions: A marine pipeline repair mechanical connector, the mechanical connector is used to connect two disconnected pipeline bodies; it includes a connection sleeve, a tension structure, a sealing structure, and a locking structure; The connecting sleeve is provided with an installation channel for inserting and fixing the pipeline body. Along the insertion direction of the pipeline body, the connecting sleeve sequentially includes a locking sleeve, a sealing sleeve, and a fixing sleeve. The sealing sleeve is slidably inserted and connected with the fixing sleeve. A connecting flange is provided on one side of the fixing sleeve away from the sealing sleeve, and the pipeline body is abutted and fixed with the fixing sleeve; A plurality of tension structures are provided, and the plurality of tension structures are arranged at intervals in a ring along the outer periphery of the connecting sleeve. The tension structure is used to pull the locking sleeve and the sealing sleeve close to the fixing sleeve; The sealing structure is arranged on the inner peripheral wall of the sealing sleeve, and the locking structure is arranged on the inner peripheral wall of the locking sleeve; When the tension structure pulls the locking sleeve and the fixing sleeve closer to each other, the locking sleeve applies a mechanical fastening force to the pipeline body through the locking structure, and the sealing sleeve and the fixing sleeve squeeze the sealing structure, and the sealing structure is axially compressed to seal the gap between the sealing sleeve and the pipeline body.

[0007] By adopting the above technical solutions, the staff hoists the mechanical connector to the pipeline body in the ocean and inserts the pipeline body into the mechanical connector. Subsequently, the staff uses professional equipment to apply mechanical force to the tension structure, so that the tension structure drives the locking sleeve and the sealing sleeve to approach the fixing sleeve; the sealing structure seals the gap between the sealing sleeve and the pipeline body to prevent the medium in the pipeline body from leaking; at the same time, the locking sleeve applies a mechanical fastening force to the pipeline body through the locking structure to improve the mechanical connection stability between the mechanical connector and the pipeline body, and ensure that the connection part between the pipeline body and the mechanical connector can withstand external forces.

[0008] That is, by installing a mechanical connector at the ends of the two disconnected pipeline bodies, connecting flanges are provided at the ends of both pipeline bodies; subsequently, the staff installs a repair pipeline with a connecting flange between the two mechanical connectors and connects the mechanical connector and the repair pipeline by flanges; thus, a good mechanical connection is formed between the two pipeline bodies, and the mechanical connector provides good sealing performance and holding ability for the pipeline body.

[0009] In summary: The mechanical connector of the present application is sleeved on the pipeline body to be repaired. By applying an action to the tension structure, a stable mechanical connection and a good sealing connection between the mechanical connector and the pipeline body can be realized; thus, the damaged pipeline system in the ocean can be repaired quickly and conveniently.

[0010] Optionally, the tension structure includes a first tension screw and a first tension nut; a first connecting convex ring is provided on the outer periphery of the locking sleeve, and a second connecting convex ring is provided on the fixed sleeve. The first connecting convex ring and the second connecting convex ring are provided with mounting holes for the first tension screw to pass through. The first tension nut is arranged at both ends of the first tension screw; the first tension nut is threadedly connected to the first tension screw. When a mechanical force is applied to the first tension nut to force the locking sleeve and all the sealing sleeves to approach the fixed sleeve.

[0011] By adopting the above technical solution, a mechanical force is applied to the first tension nut through a professional device, so that the locking sleeve and the sealing sleeve move towards the fixed sleeve; the installation speed and convenience of the mechanical connection between the mechanical connector and the pipeline body are improved.

[0012] Optionally, the sealing sleeve and the fixed sleeve enclose a receiving groove for receiving the sealing structure; the sealing structure includes a sealing ring and a sealing guide; the outer ring of the sealing ring is hermetically connected to the sealing sleeve, and the inner ring of the sealing ring is used for hermetically connecting to the pipeline body; one side of the sealing guide is abutted and fixed to the sealing ring, the other side of the sealing guide is provided with a first sealing guide surface, and the groove side wall of the receiving groove is provided with a second sealing guide surface. The first sealing guide surface is abutted and fixed to the second sealing guide surface; when the sealing sleeve and the fixed sleeve approach each other, the cross-section of the receiving groove shrinks to squeeze the sealing ring, and the second sealing guide surface forces the first sealing guide surface to move towards the pipeline body, and the sealing guide applies a force towards the pipeline body to the sealing ring, so that the sealing ring seals the gap between the sealing sleeve and the pipeline body.

[0013] By adopting the above technical solution, by arranging sealing guides on both sides of the sealing ring, when the sealing sleeve and the fixed sleeve slide close to each other, the compression deformation amount of the sealing ring in the radial direction of the sealing sleeve can be increased, so as to further improve the sealing performance between the sealing sleeve and the pipeline body.

[0014] Optionally, the locking structure includes a limiting component and a locking component. The locking component is disposed between the limiting component and the locking sleeve. The inner peripheral wall of the locking sleeve has a locking guiding surface. Along the direction away from the sealing sleeve, the distance from the locking guiding surface to the central axis of the locking sleeve decreases. The locking components are annularly and spacedly arranged on the inner periphery of the locking sleeve. The locking component includes a locking rod, a locking spring, a locking column, and a locking ball. The locking rod is fixedly connected to the locking sleeve. The locking spring is sleeved on the outer periphery of the locking rod. The locking column is provided with a locking groove for accommodating the locking spring. One end of the locking column away from the locking rod is provided with a limiting groove for accommodating the locking ball. The locking column and the locking ball are in contact with the locking guiding surface. The limiting component includes a limiting sleeve, a guiding rod, and a fixing bolt. The inner peripheral wall of the locking sleeve is provided with a limiting groove. The limiting sleeve is disposed in the limiting groove. The side wall of the limiting groove away from the sealing sleeve is the first groove side wall. The locking sleeve is penetrated with a first limiting hole. The limiting sleeve is provided with a second limiting hole. The fixing bolt passes through the first limiting hole and the second limiting hole. The locking sleeve is penetrated with a waist-shaped guiding through hole. The guiding rod is disposed in the waist-shaped guiding through hole and is fixedly connected to the limiting sleeve. The locking sleeve moves along the axial direction of the locking sleeve. The limiting sleeve is provided with a through hole for the locking ball to pass through. The limiting sleeve has a supporting portion for supporting the locking ball. When the fixing bolt is fixedly connected to the limiting sleeve, there is a clearance distance between the limiting sleeve and the first groove side wall, and the locking ball is disposed on the supporting portion. When the fixing bolt is separated from the limiting sleeve, the locking component forces the locking sleeve to move away from the sealing sleeve, and the locking ball passes through the through hole and abuts against the pipe body. When the tension structure drives the locking sleeve to approach the fixing sleeve, the locking guiding surface presses the locking ball, and the locking ball rolls out a locking pit on the outer peripheral wall of the pipe body.

[0015] By adopting the above technical solution, before the mechanical connector is mechanically connected to the pipe body, the locking sleeve has a limiting effect on the locking component, so that the locking ball is disposed between the locking sleeve and the limiting sleeve, facilitating the insertion of the pipe body into the mechanical connector. Subsequently, the connection between the fixing bolt and the limiting sleeve is released. The locking sleeve in the locking component applies a force in the direction away from the sealing sleeve to the limiting sleeve, causing the limiting sleeve to move away from the sealing sleeve. At this time, the locking ball is separated from the limiting sleeve, and the locking spring extends to force the locking ball to move along the locking guiding surface. After the locking ball passes through the through hole, it abuts against the pipe body. A plurality of locking balls apply mechanical forces to the pipe body to initially fix the pipe body.

[0016] Subsequently, when the traction locking sleeve of the tension structure approaches the fixed sleeve, since the locking balls are arranged between the fastening guiding surface of the locking sleeve and the pipe body, the locking sleeve exerts a force on the locking balls towards the sealing sleeve and a force towards the pipe body; thus, the locking balls will roll out locking pits on the outer peripheral wall of the pipe body, so that the pipe body has a limiting effect on the locking balls, blocking the locking balls from moving towards the fixed sleeve. Under the action of the tension assembly, the locking sleeve further approaches the fixed sleeve, further increasing the force exerted by the locking guiding surface on the locking balls; thereby improving the holding ability of the mechanical connector on the pipe body, enhancing the connection strength between the mechanical connector and the pipe body, and further improving the stability of the mechanical connection between the mechanical connector and the pipe body.

[0017] Optionally, the support portion is provided with the through hole, and the hole side wall of the through hole is provided with a support surface for supporting the locking balls.

[0018] By adopting the above technical solution, before installation, the locking balls are arranged on the hole side wall of the conveying hole; after the fixing bolt is separated from the limiting sleeve, the locking spring exerts a force on the limiting sleeve away from the sealing sleeve, and the locking sleeve moves away from the sealing sleeve, so that it is convenient for the locking balls to pass through the through hole, so as to facilitate the locking balls to quickly abut against the pipe body.

[0019] Optionally, when the tension structure drives the locking sleeve and the fixed sleeve to approach each other, the side wall of the first groove pushes the limiting sleeve, and the hole side wall of the through hole abuts against the locking balls.

[0020] By adopting the above technical solution, the limiting sleeve abuts against the locking balls, that is, the limiting sleeve has a limiting effect on the locking balls after installation; reducing the occurrence of the situation that the locking balls shift due to external vibration, improving the connection stability between the locking sleeve, the locking balls and the pipe body, and enhancing the stability of the mechanical connection between the mechanical connector and the pipe body.

[0021] Optionally, the limiting sleeve further has a fragile part. Along the circumferential direction of the limiting sleeve, the fragile part is arranged on both sides of the support portion, and the support portion has the support surface for supporting the locking balls; when the side wall of the first groove pushes the limiting sleeve towards the sealing sleeve, the fragile part of the limiting sleeve abuts against the locking balls. After the fragile part and the locking balls are squeezed and damaged, the support portion of the limiting sleeve abuts against the locking balls, and the fragile part falls to the periphery of the locking balls.

[0022] By adopting the above technical solution, fragile parts are arranged on both sides of the supporting part. After the fragile parts are squeezed and broken by the locking balls, the fragments of the fragile parts will fall to the periphery of the locking balls, and the fragments of the fragile parts play a limiting role on the locking balls. Therefore, when the mechanical connector is affected by external vibration, the risk of the locking balls disengaging from the locking pits and the limiting grooves can be reduced, so as to further improve the mechanical connection stability between the mechanical connector and the pipe body.

[0023] Optionally, it further includes a strengthening structure; a plugging groove is formed on the outer peripheral side of the locking sleeve, and a sliding groove is formed on the inner peripheral side of the locking sleeve, and the plugging groove is communicated with the sliding groove; a sliding member is arranged in the locking sleeve, the sliding member is arranged in the sliding groove, the locking column is fixedly connected with the sliding member, and the locking spring is in contact with the sliding member; the sliding member is slidably connected with the locking sleeve, and the sliding direction of the sliding member is consistent with the guiding direction of the locking guiding surface; the strengthening structure includes a driving member, the driving member is arranged between the sliding member and the groove side wall of the plugging groove, and the driving member forces the sliding member to move away from the sealing sleeve.

[0024] By adopting the above technical solution, since the locking balls roll out locking pits on the outer peripheral wall of the pipe body, the pipe body has a limiting effect on the locking balls, so that the moving amount of the locking sleeve is greater than that of the locking balls, the length of the locking spring increases, the acting force of the locking spring on the locking balls decreases, and the limiting effect of the locking column on the locking balls also decreases.

[0025] In this application, by forcing the sliding member to move away from the sealing sleeve by the driving member, the sliding member moves towards the locking balls to compress the locking spring; to increase the acting force of the locking spring on the locking balls and improve the limiting effect of the locking column on the locking balls. Therefore, when the mechanical connector is affected by external vibration and other effects, the risk of the locking balls disengaging from the locking pits and the limiting grooves can be reduced, so as to further improve the mechanical connection stability between the mechanical connector and the pipe body.

[0026] Optionally, the strengthening structure further includes a moving component, which includes a second pair of tension screws, second pair of tension nuts, an elastic compression member, and an extrusion member; a first connection convex ring and a fourth connection convex ring are spaced apart on the outer periphery of the locking sleeve, and the fourth connection convex ring is arranged on the side of the first connection convex ring close to the sealing sleeve. Installation holes for the second pair of tension screws to pass through are provided on the first connection convex ring and the fourth connection convex ring. Threaded segments threadedly connected to the second pair of tension nuts are provided at both ends of the second pair of tension screws. The driving member is fixedly connected to the second pair of tension screws. The extrusion member is arranged on the side of the fourth connection convex ring close to the sealing sleeve, and a through hole for the second pair of tension screws to pass through is provided in the extrusion member. The elastic compression member is arranged between the fourth connection convex ring and the extrusion member; when a mechanical force is applied to the second pair of tension nuts far from the sealing sleeve, the second pair of tension screws and the driving member move away from the sealing sleeve.

[0027] By adopting the above technical solution, a mechanical force is applied to the second pair of tension nuts far from the sealing sleeve by using professional equipment, so that the second pair of tension screws and the driving member move away from the sealing sleeve; thereby quickly and conveniently pushing the sliding member to slide, so that the sliding member compresses the locking spring, improving the installation efficiency and convenience of the mechanical connector.

[0028] Optionally, the driving member includes a driving plate and a limiting plate. The driving plate is inserted between the sliding member and the side wall of the insertion groove. A through hole for the second pair of tension screws to pass through is provided in the driving plate. The limiting plate is fixedly arranged on the driving plate, and the limiting plate is fixedly connected to the second pair of tension screws.

[0029] By adopting the above technical solution, the limiting plate is fixedly connected to the second pair of tension screws to facilitate the installation and fixation of the strengthening structure.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: The mechanical connector of the present application is sleeved on the pipeline body to be repaired. By applying an action to the tension structure, a stable mechanical connection and a good sealing connection between the mechanical connector and the pipeline body can be achieved; to quickly and conveniently repair the damaged pipeline system in the ocean; By arranging sealing guiding members on both sides of the sealing ring, when the sealing sleeve and the fixed sleeve slide close to each other, the compression deformation amount of the sealing ring in the radial direction of the sealing sleeve can be increased, so as to further improve the sealing performance between the sealing sleeve and the pipeline body; When the traction locking sleeve of the tension structure approaches the fixed sleeve, since the locking balls are arranged between the fastening guide surface of the locking sleeve and the pipe body, the locking sleeve exerts a force on the locking balls towards the sealing sleeve and a force towards the pipe body; as a result, the locking balls will roll out locking pits on the outer peripheral wall of the pipe body, so that the pipe body has a limiting effect on the locking balls, blocking the locking balls from moving towards the fixed sleeve. Under the action of the tension assembly, the locking sleeve further approaches the fixed sleeve, further increasing the force exerted by the locking guide surface on the locking balls; thus improving the holding ability of the mechanical connector on the pipe body, enhancing the connection strength between the mechanical connector and the pipe body, and further improving the stability of the mechanical connection between the mechanical connector and the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram showing the principle of offshore pipeline repair in Embodiment 1.

[0032] Figure 2 is an axonometric view of the mechanical connector in Embodiment 1.

[0033] Figure 3 is a cross-sectional view showing the internal structure of the mechanical connector in Embodiment 1.

[0034] Figure 4 is a cross-sectional view of the mechanical connector in Embodiment 1.

[0035] Figure 5 is Figure 4 an enlarged view of part A in

[0036] Figure 6 is Figure 5 an enlarged view of part B in

[0037] Figure 7 is Figure 4 an enlarged view of part C in

[0038] Figure 8 is Figure 7 an enlarged view of part D in

[0039] Figure 9 is a cross-sectional view of the mechanical connector in Embodiment 1 through the fixing bolts.

[0040] Figure 10 is Figure 9 an enlarged view of part E in

[0041] Figure 11 is a schematic diagram of the locking structure after the fixing bolts are separated from the limiting sleeve.

[0042] Figure 12It is a schematic diagram of the locking structure after the locking guide surface presses the locking ball towards the sealing sleeve direction.

[0043] Figure 13 It is Figure 12 The enlarged view of the position F in

[0044] Figure 14 It is a cross-sectional view of the mechanical connector in Embodiment 2.

[0045] Figure 15 It is Figure 14 The enlarged view of the position G in

[0046] Figure 16 It is a schematic diagram showing the structure of the limiting sleeve in Embodiment 2.

[0047] Explanation of reference numerals: 11, pipe body; 111, locking pit; 12, connecting flange; 13, repair pipe; 2, connecting sleeve; 21, locking sleeve; 211, first connecting convex ring; 212, locking guide surface; 213, limiting groove; 2131, first groove side wall; 214, first limiting hole; 215, waist-shaped guiding through hole; 216, insertion slot; 217, sliding slot; 218, fourth connecting convex ring; 22, sealing sleeve; 221, third connecting convex ring; 23, fixing sleeve; 231, second connecting convex ring; 25, accommodating groove; 3, tension structure; 31, first tension screw rod; 32, first tension nut; 4, sealing structure; 41, sealing ring; 42, sealing guide; 421, notch; 5, locking structure; 51, limiting component; 511, limiting sleeve; 5111, second limiting hole; 5112, through hole; 5113, supporting part; 5114, fragile part; 5115, dividing groove; 512, guiding rod; 513, fixing bolt; 52, locking component; 521, locking rod; 522, locking spring; 523, locking column; 5231, locking groove; 5232, limiting groove; 524, locking ball; 6, strengthening structure; 61, moving component; 611, second tension screw rod; 612, second tension nut; 613, elastic compression part; 614, pressing part; 62, driving part; 621, driving plate; 622, limiting plate; 623, connecting bolt; 7, sliding part. Detailed implementation manners

[0048] The following further describes the present application in detail with reference to Figure 1 -16.

[0049] Embodiment 1

[0050] The embodiment of the present application discloses a marine pipeline repair mechanical connector. Refer to Figure 1 and Figure 2, when a local break occurs in the subsea pipeline, first cut off the damaged section of the subsea pipeline so that the two pipeline bodies 11 are arranged opposite to each other. The technical solution of the present application installs mechanical connectors at the ends of the two disconnected pipeline bodies 11, so that connection flanges 12 are provided at the ends of the two pipeline bodies 11; Subsequently, the staff installs a repair pipeline 13 with a connection flange 12 between the two mechanical connectors and flange-connects the mechanical connectors to the repair pipeline 13; thereby forming a good mechanical connection between the two pipeline bodies 11, and the mechanical connectors provide good sealing performance and gripping ability for the pipeline body 11.

[0051] The mechanical connector for subsea pipeline repair includes a connection sleeve 2, a tension structure 3, a sealing structure 4 and a locking structure 5.

[0052] Refer to Figure 3 and Figure 4 , the connection sleeve 2 is provided with an installation channel for the pipeline body 11 to be inserted and fixed. Along the insertion direction of the pipeline body 11, the connection sleeve 2 successively includes a locking sleeve 21, a sealing sleeve 22 and a fixing sleeve 23, and the sealing sleeve 22 is slidably inserted and connected with the fixing sleeve 23. The tension structure 3 connects the locking sleeve 21, the sealing sleeve 22 and the fixing sleeve 23 into a whole; and at this time, a reserved space for approaching each other is also provided between the sealing sleeve 22 and the fixing sleeve 23. In this embodiment, the locking sleeve 21 is spliced by a plurality of sleeve sections, and stepped surfaces are provided on both sides of the sleeve section.

[0053] Refer to Figure 5 and Figure 6 , the sealing sleeve 22 and the fixing sleeve 23 enclose a receiving groove 25 for receiving the sealing structure 4; the sealing structure 4 has compressibility, so that there is a reserved space for approaching each other between the sealing sleeve 22 and the fixing sleeve 23 before the mechanical connector is mechanically connected to the pipeline body 11. In this embodiment, two sealing structures 4 are arranged at intervals, and two corresponding sealing sleeves 22 are provided; one sealing structure 4 is arranged between the two sealing sleeves 22, and the other sealing structure 4 is arranged between the sealing sleeve 22 and the fixing sleeve 23. And the sealing sleeve 22 can also be provided with a detection ring groove, which is arranged between the two sealing structures 4 for detecting the water pressure.

[0054] A connection flange 12 is provided on the side of the fixing sleeve 23 away from the sealing sleeve 22, and the pipeline body 11 is abutted and fixed to the fixing sleeve 23; the fixing sleeve 23 is used for fixedly connecting with a connecting pipeline to reconnect the two pipeline bodies 11.

[0055] Refer to Figure 3 and Figure 4, there are several tension structures 3, and several tension structures 3 are arranged at intervals along the outer circumference of the connecting sleeve 2. The tension structure 3 is used to pull the locking sleeve 21 and the sealing sleeve 22 close to the fixed sleeve 23. The tension structure 3 includes a first tension screw 31 and a first tension nut 32; the outer circumference of the locking sleeve 21 has a first connecting convex ring 211, the fixed sleeve 23 has a second connecting convex ring 231, and the sealing sleeve 22 has a third connecting convex ring 221. The first connecting convex ring 211, the second connecting convex ring 231 and the third connecting convex ring 221 are provided with mounting holes for the first tension screw 31 to pass through, and the first tension nut 32 is arranged at both ends of the first tension screw 31; the first tension nut 32 is threadedly connected with the first tension screw 31. When a mechanical force is applied to the first tension nut 32, the locking sleeve 21 and all the sealing sleeves 22 are forced to approach the fixed sleeve 23.

[0056] In this embodiment, a hydraulic driving device is pre-installed at one end of the first tension screw 31 away from the sealing sleeve 22, and the hydraulic driving device is used to drive the first tension nut 32 to rotate, so as to shorten the distance between the two first tension nuts 32, and to force the locking sleeve 21 and the sealing sleeve 22 to approach the fixed sleeve 23.

[0057] Refer to Figures 4 to 6 , the sealing structure 4 includes a sealing ring 41 and a sealing guide 42. The outer ring of the sealing ring 41 is hermetically connected to the sealing sleeve 22, and the inner ring of the sealing ring 41 is used to be hermetically connected to the pipeline body 11; one side of the sealing guide 42 is fixedly abutted against the sealing ring 41.

[0058] Refer to Figure 6 and Figure 7 , the other side of the sealing guide 42 is provided with a first sealing guide surface, and the groove side wall of the receiving groove 25 is provided with a second sealing guide surface. The first sealing guide surface is fixedly abutted against the second sealing guide surface; when the sealing sleeve 22 and the fixed sleeve 23 approach each other, the cross-section of the receiving groove 25 shrinks to squeeze the sealing ring 41, and the second sealing guide surface forces the first sealing guide surface to move towards the pipeline body 11. The sealing guide 42 applies a force towards the pipeline body 11 to the sealing ring 41, so that the sealing ring 41 seals the gap between the sealing sleeve 22 and the pipeline body 11. By arranging the sealing guides 42 on both sides of the sealing ring 41, when the sealing sleeve 22 and the fixed sleeve 23 slide closer, the compression deformation amount of the sealing ring 41 in the radial direction of the sealing sleeve 22 can be increased, so as to further improve the sealing performance between the sealing sleeve 22 and the pipeline body 11. The sealing ring 41 can be a rubber, graphite or metal pressure seal, etc.; in this embodiment, the sealing guide 42 is an annular structure with a notch 421, so that the sealing guide 42 shrinks inward under the action of the extrusion force.

[0059] Refer to Figure 8 and Figure 9, a locking structure 5 is arranged on the inner peripheral wall of the locking sleeve 21. The locking structure 5 includes a limiting component 51 and a locking component 52. The locking component 52 is arranged between the limiting component 51 and the locking sleeve 21. The inner peripheral wall of the locking sleeve 21 has a locking guiding surface 212. Along the direction away from the sealing sleeve 22, the distance from the locking guiding surface 212 to the central axis of the locking sleeve 21 decreases.

[0060] The locking components 52 are arranged at intervals in a ring on the inner periphery of the locking sleeve 21, and along the axial direction of the locking sleeve 21, multiple groups of annularly arranged locking components 52 are provided at intervals. The locking component 52 includes a locking rod 521, a locking spring 522, a locking column 523 and a locking ball 524; the locking rod 521 is fixedly connected to the locking sleeve 21, the locking spring 522 is sleeved on the outer periphery of the locking rod 521, the locking column 523 is provided with a locking groove 5231 for accommodating the locking spring 522, one end of the locking column 523 away from the locking rod 521 is provided with a limiting groove 5232 for accommodating the locking ball 524, and the locking column 523 is in contact with the locking ball 524 on the locking guiding surface 212.

[0061] Refer to Figure 8 , Figure 10 and Figure 11 , the limiting component 51 includes a limiting sleeve 511, a guiding rod 512 and a fixing bolt 513.

[0062] A limiting groove 213 is provided on the inner peripheral wall of the locking sleeve 21, the limiting sleeve 511 is arranged in the limiting groove 213, and the side wall of the limiting groove 213 away from the sealing sleeve 22 is the first side wall 2131; the locking sleeve 21 is provided with a first limiting hole 214 through it, the limiting sleeve 511 is provided with a second limiting hole 5111, the fixing bolt 513 passes through the first limiting hole 214 and the second limiting hole 5111, the locking sleeve 21 is provided with a waist-shaped guiding through hole 215, the guiding rod 512 is arranged in the waist-shaped guiding through hole 215, and the guiding rod 512 is fixedly connected to the limiting sleeve 511. When the locking sleeve 21 moves along the axial direction of the locking sleeve 21, the limiting sleeve 511 is provided with a through hole 5112 for the locking ball 524 to pass through, and the limiting sleeve 511 has a supporting part 5113 for supporting the locking ball 524. In this embodiment, the supporting part 5113 is provided with a through hole 5112, and the hole side wall of the through hole 5112 is provided with a supporting surface for supporting the locking ball 524.

[0063] Refer to Figure 9, before the mechanical connector is mechanically connected to the pipe body 11, the fixing bolt 513 is fixedly connected to the limiting sleeve 511. There is a clearance distance between the limiting sleeve 511 and the side wall 2131 of the first groove. The locking ball 524 is arranged on the supporting portion 5113. That is, the locking sleeve 21 has a limiting effect on the locking assembly 52, so that the locking ball 524 is arranged between the locking sleeve 21 and the limiting sleeve 511, facilitating the insertion of the pipe body 11 into the mechanical connector.

[0064] Refer to Figure 11 , during the process of mechanically connecting the mechanical connector to the pipe body 11, the fixing bolt 513 is separated from the limiting sleeve 511. The locking sleeve 21 in the locking assembly 52 applies a force in the direction away from the sealing sleeve 22 to the limiting sleeve 511, causing the limiting sleeve 511 to move away from the sealing sleeve 22. At this time, the locking ball 524 is separated from the limiting sleeve 511, and the locking spring 522 elongates to force the locking ball 524 to move along the locking wire surface. The locking ball 524 passes through the through hole 5112 and abuts against the pipe body 11. A number of locking balls 524 apply a mechanical force to the pipe body 11 to preliminarily fix the pipe body 11.

[0065] Refer to Figure 12 and Figure 13 , subsequently, during the process of the tension structure 3 pulling the locking sleeve 21 closer to the fixed sleeve 23, since the locking ball 524 is arranged between the fastening guiding surface of the locking sleeve 21 and the pipe body 11, the locking sleeve 21 applies a force towards the sealing sleeve 22 and a force towards the pipe body 11 to the locking ball 524. Thus, the locking ball 524 will roll out a locking pit 111 on the outer peripheral wall of the pipe body 11, enabling the pipe body 11 to have a limiting effect on the locking ball 524 and blocking the locking ball 524 from moving towards the fixed sleeve 23. In this embodiment, the stiffness of the locking sleeve 21 and the locking ball 524 is greater than that of the pipe body 11. Therefore, when the locking sleeve 21 forces the locking ball 524 to squeeze the pipe body 11, plastic deformation will occur on the outer periphery of the pipe body 11 to form the locking pit 111.

[0066] Refer to Figure 12 and Figure 13 , and under the action of the tension assembly, the locking sleeve 21 further approaches the fixed sleeve 23, further increasing the force applied by the locking guiding surface 212 of the locking sleeve 21 to the locking ball 524. Thus, the holding ability of the mechanical connector to the pipe body 11 is improved, the connection strength between the mechanical connector and the pipe body 11 is increased, and the stability of the mechanical connection between the mechanical connector and the pipe body 11 is further improved.

[0067] When the tension structure 3 drives the locking sleeve 21 and the fixed sleeve 23 to approach each other, the side wall 2131 of the first groove squeezes the limiting sleeve 511, causing the limiting sleeve 511 to move towards the sealing sleeve 22 until the hole side wall of the through hole 5112 abuts against the locking ball 524. The abutment of the limiting sleeve 511 against the locking ball 524 means that the limiting sleeve 511 has a limiting effect on the locking ball 524 after installation; the situation where the locking ball 524 is displaced due to external vibration is reduced, the connection stability between the locking sleeve 21, the locking ball 524 and the pipeline body 11 is improved, and the mechanical connection stability between the mechanical connector and the pipeline body 11 is improved.

[0068] The implementation principle of a marine pipeline repair mechanical connector in an embodiment of the present application is as follows: Referring to Figure 1 , the staff hoists the mechanical connector to the pipeline body 11 in the ocean and inserts the pipeline body 11 into the mechanical connector.

[0069] Referring to Figures 2 to 4 , subsequently, the staff uses professional equipment to apply mechanical force to the tension structure 3, causing the tension structure 3 to drive the locking sleeve 21 and the sealing sleeve 22 to approach the fixed sleeve 23; the sealing structure 4 seals the gap between the sealing sleeve 22 and the pipeline body 11 to prevent the medium in the pipeline body 11 from leaking; at the same time, the locking sleeve 21 applies mechanical fastening force to the pipeline body 11 through the locking structure 5 to improve the mechanical connection firmness between the mechanical connector and the pipeline body 11 and ensure that the connection part between the pipeline body 11 and the mechanical connector can withstand external forces.

[0070] That is, by installing a mechanical connector at the ends of two disconnected pipeline bodies 11, connection flanges 12 are provided at the ends of both pipeline bodies 11; subsequently, the staff installs a repair pipeline 13 with connection flanges 12 between the two mechanical connectors and flange-connects the mechanical connector and the repair pipeline 13; thus, a good mechanical connection is formed between the two pipeline bodies 11, and the mechanical connector provides good sealing performance and gripping ability for the pipeline body 11.

[0071] In summary: The mechanical connector of the present application is sleeved on the pipeline body 11 to be repaired. By applying an action to the tension structure 3, a firm mechanical connection and a good sealing connection between the mechanical connector and the pipeline body 11 can be achieved; thus, the damaged pipeline system in the ocean can be repaired quickly and conveniently. Embodiment 2

[0072] The difference between this Embodiment 2 and Embodiment 1 is as follows: Referring to Figure 14 and Figure 15, the mechanical connector further includes a reinforcing structure 6, and the reinforcing structure 6 includes a moving component 61 and a driving component 62.

[0073] Referring to Figure 15 , a plugging groove 216 is formed on the outer peripheral side of the locking sleeve 21, and a sliding groove 217 is formed on the inner peripheral side of the locking sleeve 21. The plugging groove 216 is communicated with the sliding groove 217; a sliding member 7 is arranged in the locking sleeve 21, the sliding member 7 is arranged in the sliding groove 217, the locking column 523 is fixedly connected with the sliding member 7, and the locking spring 522 is abutted against the sliding member 7; the sliding member 7 is slidably connected with the locking sleeve 21, and the sliding direction of the sliding member 7 is consistent with the guiding direction of the locking guiding surface 212. The driving component 62 is arranged between the sliding member 7 and the groove side wall of the plugging groove 216, and the driving component 62 forces the sliding member 7 to move away from the sealing sleeve 22. In this embodiment, the plugging groove 216 is an annular groove with a certain width to drive a plurality of annularly arranged locking components 52 at the same time.

[0074] Referring to Figure 14 and Figure 15 , the moving component 61 includes a second pair of pulling screws 611, a second pair of pulling nuts 612, an elastic compression member 613 and an extrusion member 614; a fourth connecting convex ring 218 is further arranged on the outer periphery of the locking sleeve 21. The fourth connecting convex ring 218 is arranged on the side of the first connecting convex ring 211 close to the sealing sleeve 22. The first connecting convex ring 211 and the fourth connecting convex ring 218 are provided with mounting holes for the second pair of pulling screws 611 to pass through. Threaded segments for threaded connection with the second pair of pulling nuts 612 are arranged at both ends of the second pair of pulling screws 611. The driving component 62 is fixedly connected with the second pair of pulling screws 611. The extrusion member 614 is arranged on the side of the fourth connecting convex ring 218 close to the sealing sleeve 22. The extrusion member 614 is provided with a through hole for the second pair of pulling screws 611 to pass through. The elastic compression member 613 is arranged between the fourth connecting convex ring 218 and the extrusion member 614; when a mechanical force is applied to the second pair of pulling nuts 612 far from the sealing sleeve 22, the second pair of pulling screws 611 and the driving component 62 move away from the sealing sleeve 22. The elastic compression member 613 is made of the same material as the sealing ring 41, that is, the elastic compression member 613 can be made of compressible rubber, silica gel, metal pressure sealant, etc.

[0075] Referring to Figure 15, the driving member 62 includes a driving plate 621 and a limiting plate 622. The driving plate 621 is inserted between the sliding member 7 and the groove side wall of the insertion groove 216. The driving plate 621 is initially provided with a through hole for the second pair of tension screws 611 to pass through. The limiting plate 622 is fixedly arranged on the driving plate 621, and the limiting plate 622 is fixedly connected to the second pair of tension screws 611. The limiting plate 622 is fixedly connected to the second pair of tension screws 611 to facilitate the installation and fixation of the reinforcing structure 6. In this embodiment, the limiting plate 622 and the second pair of tension screws 611 are fixedly connected by a connecting bolt 623; the limiting plate 622 and the second pair of tension screws 611 are provided with through holes for the connecting bolt 623 to pass through.

[0076] The implementation principle of a marine pipeline repair mechanical connector in an embodiment of the present application is as follows: Referring to Figure 14 and Figure 15 , since the locking balls 524 roll out locking pits 111 on the outer peripheral wall of the pipeline body 11, the pipeline body 11 has a limiting effect on the locking balls 524, making the movement amount of the locking sleeve 21 greater than that of the locking balls 524. The length of the locking spring 522 increases, causing the acting force of the locking spring 522 on the locking balls 524 to decrease, and the limiting effect of the locking column 523 on the locking balls 524 also decreases.

[0077] Referring to Figure 14 and Figure 15 , applying mechanical force to the second pair of tension nuts 612 far from the sealing sleeve 22 using professional equipment, causing the second pair of tension screws 611 and the driving member 62 to move away from the sealing sleeve 22; thereby quickly and conveniently pushing the sliding member 7 to slide, enabling the sliding member 7 to compress the locking spring 522, improving the installation efficiency and convenience of the mechanical connector.

[0078] Referring to Figure 14 and Figure 15 , in the present application, the driving member 62 forces the sliding member 7 to move away from the sealing sleeve 22, causing the sliding member 7 to move towards the locking balls 524 to compress the locking spring 522; to increase the acting force of the locking spring 522 on the locking balls 524 and improve the limiting effect of the locking column 523 on the locking balls 524. Thus, when the mechanical connector is subjected to external vibrations and other effects, the risk of the locking balls 524 disengaging from the locking pits 111 and the limiting grooves 5232 can be reduced, further improving the stability of the mechanical connection between the mechanical connector and the pipeline body 11. Embodiment 3

[0079] The difference between this Embodiment 3 and Embodiment 2 is: Referring to Figure 16, the limiting sleeve 511 further has a frangible part 5114. Along the circumferential direction of the limiting sleeve 511, the frangible part 5114 is arranged on both sides of the supporting part 5113, and the supporting part 5113 has a supporting surface for supporting the locking ball 524; when the side wall 2131 of the first groove pushes the limiting sleeve 511 towards the sealing sleeve 22, the frangible part 5114 of the limiting sleeve 511 abuts against the locking ball 524. After the frangible part 5114 and the locking ball 524 are crushed by extrusion, the supporting part 5113 of the limiting sleeve 511 abuts against the locking ball 524, and the frangible part 5114 falls to the periphery of the locking ball 524. In this embodiment, the limiting sleeve 511 is a plastic part, and a plurality of dividing grooves 5115 are arranged on the frangible part 5114 of the limiting sleeve 511 to reduce the stiffness of the frangible part 5114 on the limiting sleeve 511 and facilitate the breakage of the frangible part 5114.

[0080] The implementation principle of a marine pipeline repair mechanical connector in an embodiment of the present application is as follows: Refer to Figure 16 , by arranging the frangible part 5114 on both sides of the supporting part 5113, after the frangible part 5114 and the locking ball 524 are crushed by extrusion, the fragments of the frangible part 5114 will fall to the periphery of the locking ball 524, and the fragments of the frangible part 5114 have a limiting effect on the locking ball 524. Thus, when the mechanical connector is affected by external vibration, the risk of the locking ball 524 disengaging from the locking pit 111 and the limiting groove 5232 can be reduced, so as to further improve the firmness of the mechanical connection between the mechanical connector and the pipeline body 11.

[0081] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An offshore pipeline repair mechanical connector, the mechanical connector being used to connect two disconnected pipeline bodies (11); characterized in that: It includes a connecting sleeve (2), a tension structure (3), a sealing structure (4) and a locking structure (5); the connecting sleeve (2) is provided with an installation channel for inserting and fixing the pipeline body (11). Along the insertion direction of the pipeline body (11), the connecting sleeve (2) successively includes a locking sleeve (21), a sealing sleeve (22) and a fixing sleeve (23). The sealing sleeve (22) is slidably inserted and connected with the fixing sleeve (23). A connecting flange (12) is provided on one side of the fixing sleeve (23) away from the sealing sleeve (22), and the pipeline body (11) is abutted and fixed with the fixing sleeve (23); several tension structures (3) are provided, and several tension structures (3) are annularly and spaced along the outer periphery of the connecting sleeve (2). The tension structure (3) is used to pull the locking sleeve (21) and the sealing sleeve (22) close to the fixing sleeve (23); the sealing structure (4) is arranged on the inner peripheral wall of the sealing sleeve (22), and the locking structure (5) is arranged on the inner peripheral wall of the locking sleeve (21). When the tension structure (3) pulls the locking sleeve (21) and the fixing sleeve (23) close to each other, the locking sleeve (21) applies a mechanical fastening force to the pipeline body (11) through the locking structure (5), and the sealing sleeve (22) and the fixing sleeve (23) squeeze the sealing structure (4), and the sealing structure (4) is axially compressed to seal the gap between the sealing sleeve (22) and the pipeline body (11).

2. The marine pipeline repair mechanical connector according to claim 1, characterized in that: The tension structure (3) includes a first tension screw (31) and a first tension nut (32); a first connecting convex ring (211) is provided on the outer periphery of the locking sleeve (21), and the fixing sleeve (23) has a second connecting convex ring (231). Installation holes for the first tension screw (31) to pass through are provided in the first connecting convex ring (211) and the second connecting convex ring (231), and the first tension nuts (32) are arranged at both ends of the first tension screw (31); the first tension nuts (32) are threadedly connected with the first tension screw (31). When a mechanical force is applied to the first tension nuts (32), the locking sleeve (21) and all the sealing sleeves (22) are forced to approach the fixing sleeve (23).

3. The marine pipeline repair mechanical connector according to claim 1, characterized in that: The sealing sleeve (22) and the fixed sleeve (23) enclose a receiving groove (25) for receiving the sealing structure (4); the sealing structure (4) includes a sealing ring (41) and a sealing guide (42); the outer ring of the sealing ring (41) is sealingly connected to the sealing sleeve (22), and the inner ring of the sealing ring (41) is used for sealingly connecting to the pipe body (11); one side of the sealing guide (42) is abutted and fixed to the sealing ring (41), the other side of the sealing guide (42) is provided with a first sealing guide surface, and the groove side wall of the receiving groove (25) is provided with a second sealing guide surface, and the first sealing guide surface is abutted and fixed to the second sealing guide surface; when the sealing sleeve (22) and the fixed sleeve (23) approach each other, the cross-section of the receiving groove (25) shrinks to squeeze the sealing ring (41), and the second sealing guide surface forces the first sealing guide surface to move towards the pipe body (11), and the sealing guide (42) exerts a force on the sealing ring (41) towards the pipe body (11), so that the sealing ring (41) seals the gap between the sealing sleeve (22) and the pipe body (11).

4. The marine pipeline repair mechanical connector according to claim 1, characterized in that: The locking structure (5) includes a limiting component (51) and a locking component (52), and the locking component (52) is arranged between the limiting component (51) and the locking sleeve (21); The inner peripheral wall of the locking sleeve (21) has a locking guiding surface (212). Along the direction away from the sealing sleeve (22), the distance from the locking guiding surface (212) to the central axis of the locking sleeve (21) decreases; the locking components (52) are annularly and spacedly arranged on the inner periphery of the locking sleeve (21). The locking component (52) includes a locking rod (521), a locking spring (522), a locking column (523) and a locking ball (524); the locking rod (521) is fixedly connected to the locking sleeve (21), the locking spring (522) is sleeved on the outer periphery of the locking rod (521), the locking column (523) is provided with a locking groove (5231) for accommodating the locking spring (522), one end of the locking column (523) away from the locking rod (521) is provided with a limiting groove (5232), the limiting groove (5232) is used for accommodating the locking ball (524), and the locking column (523) and the locking ball (524) are attached to the locking guiding surface (212); the limiting component (51) includes a limiting sleeve (511), a guiding rod (512) and a fixing bolt (513); the inner peripheral wall of the locking sleeve (21) is provided with a limiting groove (213), the limiting sleeve (511) is arranged in the limiting groove (213), and the side wall of the limiting groove (213) away from the sealing sleeve (22) is the first side wall (2131); the locking sleeve (21) is penetrated and provided with a first limiting hole (214), the limiting sleeve (511) is provided with a second limiting hole (5111), the fixing bolt (513) passes through the first limiting hole (214) and the second limiting hole (5111), the locking sleeve (21) is penetrated with an arcuate guiding through hole (215), the guiding rod (512) is arranged in the arcuate guiding through hole (215), and the guiding rod (512) is fixedly connected to the limiting sleeve (511). When the locking sleeve (21) moves along the axial direction of the locking sleeve (21), the limiting sleeve (511) is provided with a through hole (5112) for the locking ball (524) to pass through, and the limiting sleeve (511) has a supporting portion (5113) for supporting the locking ball (524); When the fixing bolt (513) is fixedly connected to the limit sleeve (511), there is a clearance distance between the limit sleeve (511) and the side wall of the first groove (2131), and the locking ball (524) is arranged on the supporting part (5113); when the fixing bolt (513) is separated from the limit sleeve (511), the locking assembly (52) forces the locking sleeve (21) away from the sealing sleeve (22), the locking ball (524) passes through the through hole (5112), and the locking ball (524) abuts against the pipe body (11); when the tension structure (3) drives the locking sleeve (21) to approach the fixed sleeve (23), the locking guide surface (212) presses the locking ball (524), and the locking ball (524) rolls out a locking pit (111) on the outer peripheral wall of the pipe body (11).

5. The marine pipeline repair mechanical connector according to claim 4, wherein: The through hole (5112) is formed in the supporting part (5113), and the side wall of the through hole (5112) is provided with a supporting surface for supporting the locking ball (524).

6. The marine pipeline repair mechanical connector according to claim 4, characterized in that: When the tension structure (3) drives the locking sleeve (21) and the fixed sleeve (23) to approach each other, the side wall of the first groove (2131) pushes the limit sleeve (511), and the side wall of the through hole (5112) abuts against the locking ball (524).

7. The marine pipeline repair mechanical connector according to claim 5, wherein: The limit sleeve (511) further has a fragile part (5114). Along the circumferential direction of the limit sleeve (511), the fragile part (5114) is arranged on both sides of the supporting part (5113), and the supporting part (5113) has the supporting surface for supporting the locking ball (524); when the side wall of the first groove (2131) pushes the limit sleeve (511) towards the sealing sleeve (22), the fragile part (5114) of the limit sleeve (511) abuts against the locking ball (524). After the fragile part (5114) and the locking ball (524) are crushed, the supporting part (5113) of the limit sleeve (511) abuts against the locking ball (524), and the fragile part (5114) falls to the periphery of the locking ball (524).

8. The marine pipeline maintenance mechanical connector according to claim 4, characterized in that: It further includes a strengthening structure (6); a plugging groove (216) is formed on the outer peripheral side of the locking sleeve (21), and a sliding groove (217) is formed on the inner peripheral side of the locking sleeve (21), and the plugging groove (216) is communicated with the sliding groove (217); a sliding member (7) is arranged in the locking sleeve (21), the sliding member (7) is arranged in the sliding groove (217), the locking column (523) is fixedly connected with the sliding member (7), and the locking spring (522) is in contact with the sliding member (7); the sliding member (7) is slidably connected with the locking sleeve (21), and the sliding direction of the sliding member (7) is consistent with the guiding direction of the locking guiding surface (212); the strengthening structure (6) includes a driving member (62), the driving member (62) is arranged between the sliding member (7) and the groove side wall of the plugging groove (216), and the driving member (62) forces the sliding member (7) to be away from the sealing sleeve (22).

9. The marine pipeline repair mechanical connector according to claim 8, wherein: The strengthening structure (6) further includes a moving assembly (61), and the moving assembly (61) includes a second pair of tension screws (611), a second pair of tension nuts (612), an elastic compression member (613) and an extrusion member (614); a first connecting convex ring (211) and a fourth connecting convex ring (218) are arranged at intervals on the outer periphery of the locking sleeve (21), the fourth connecting convex ring (218) is arranged on the side of the first connecting convex ring (211) close to the sealing sleeve (22), and the first connecting convex ring (211) and the fourth connecting convex ring (218) are provided with mounting holes for the second pair of tension screws (611) to pass through. Threaded sections for threadedly connecting with the second pair of tension nuts (612) are arranged at both ends of the second pair of tension screws (611), the driving member (62) is fixedly connected with the second pair of tension screws (611), the extrusion member (614) is arranged on the side of the fourth connecting convex ring (218) close to the sealing sleeve (22), and a through hole for the second pair of tension screws (611) to pass through is formed in the extrusion member (614); the elastic compression member (613) is arranged between the fourth connecting convex ring (218) and the extrusion member (614); when a mechanical force is applied to the second pair of tension nuts (612) away from the sealing sleeve (22), the second pair of tension screws (611) and the driving member (62) move in a direction away from the sealing sleeve (22).

10. The marine pipeline repair mechanical connector according to claim 9, characterized in that: The driving member (62) includes a driving plate (621) and a limiting plate (622), the driving plate (621) is inserted between the sliding member (7) and the groove side wall of the plugging groove (216), a through hole for the second pair of tension screws (611) to pass through is formed in the driving plate (621), the limiting plate (622) is fixedly arranged on the driving plate (621), and the limiting plate (622) is fixedly connected with the second pair of tension screws (611).

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