A marine pipeline maintenance mechanical connector

Abstract

The present application relates to the field of marine pipeline connection technology, and in particular to a marine pipeline repair mechanical connector, comprising a connecting sleeve, a pulling structure, a sealing structure and a locking structure; the connecting sleeve is provided with an installation channel for the pipe body to be plugged in and fixed, and the connecting sleeve comprises a locking sleeve, a sealing sleeve and a fixing sleeve in sequence, and the sealing sleeve and the fixing sleeve are connected by sliding plugging; when the pulling structure pulls the locking sleeve and the fixing sleeve closer to each other, the locking sleeve applies a mechanical fastening force to the pipe body through the locking structure, 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 pipe body. The mechanical connector of the present application is sleeved on the pipe body to be repaired, and by applying force to the pulling structure, a stable mechanical connection and a good sealing connection between the mechanical connector and the pipe body can be achieved, so as to quickly and conveniently repair damaged pipe systems in the ocean.

Description

Technical Field

[0001] The present application relates to the technical field of marine pipeline connection, and in particular to a marine pipeline maintenance mechanical connector. Background Art

[0002] Pipeline coated or lined with corrosion-resistant alloy (CRA) is a composite steel pipe used in the oil and gas industry, offering enhanced corrosion resistance. It consists of an outer carbon steel backing, or substrate, and an inner corrosion-resistant alloy (CRA) layer, or lining. This type of pipe is primarily used in pipeline transportation systems within the oil and gas industry, particularly in harsh corrosive environments such as deepwater oil and gas production. Specifically, these pipelines are installed in marine environments to transport oil or gas.

[0003] When the above-mentioned pipeline is partially damaged, the pipeline needs to be urgently repaired. In the prior art, the damaged section of the pipeline can be cut off first, and then the two sections of the pipeline can be reconnected. The connection method of the two sections of the pipeline can refer to, for example, a pipeline quick connection flange published in patent number CN201711224312.0; a mechanical connector with a flange is provided at the end of the two sections of the pipeline, and then the two mechanical connectors are connected by connecting pipes with flanges at both ends, thereby realizing the rapid connection of the two sections of the pipeline. In the above patent document, the fastening effect between the mechanical connector and the pipeline can be achieved by a wedge block between the shell of the mechanical connector and the pipeline; that is, the mechanical connector shell moves to squeeze the wedge block, so that the mechanical connector shell applies a fastening force to the pipeline through the wedge block, so that the mechanical connector and the pipeline are connected into a whole.

[0004] However, due to the static friction connection between the wedge block and the pipeline, it is difficult for the shell of the mechanical connector to squeeze the wedge block to tighten the pipeline; and when the mechanical connector and the pipeline are subjected to external force, the wedge block is likely to slide relative to the pipeline, thereby affecting the mechanical bite strength between the mechanical connector and the pipeline. 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, the present application provides a marine pipeline repair mechanical connector.

[0006] This application provides a marine pipeline repair mechanical connector, which adopts the following technical solutions:

[0007] A marine pipeline maintenance mechanical connector, which is used to connect two disconnected pipeline bodies; it includes a connecting sleeve, a pulling structure, a sealing structure and a locking structure;

[0008] The connecting sleeve is provided with an installation channel for the pipe body to be plugged and fixed. Along the plugging direction of the pipe body, the connecting sleeve includes a locking sleeve, a sealing sleeve and a fixing sleeve in sequence. The sealing sleeve is connected to the fixing sleeve by sliding plugging. The fixing sleeve is provided with a connecting flange on the side away from the sealing sleeve. The pipe body is fixedly abutted against the fixing sleeve.

[0009] There are a plurality of the pulling structures, which are arranged at annular intervals along the outer circumference of the connecting sleeve, and the pulling structures are used to pull the locking sleeve and the sealing sleeve close to the fixed sleeve;

[0010] The sealing structure is provided on the inner peripheral wall of the sealing sleeve, and the locking structure is provided on the inner peripheral wall of the locking sleeve;

[0011] When the pulling structure pulls the locking sleeve and the fixed sleeve closer to each other, the locking sleeve applies a mechanical fastening force to the pipe body through the locking structure, the sealing sleeve and the fixed sleeve squeeze the sealing structure, and the sealing structure is axially compressed to seal the gap between the sealing sleeve and the pipe body.

[0012] By adopting the above technical solution, the staff hoisted the mechanical connector to the pipeline body in the ocean and inserted the pipeline body into the mechanical connector. Subsequently, the staff used specialized equipment to apply mechanical force to the tensioning structure, causing the tensioning structure to drive the locking sleeve and sealing sleeve toward the fixed sleeve. The sealing structure sealed 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 applied mechanical tightening force to the pipeline body through the locking structure to improve the mechanical connection between the mechanical connector and the pipeline body, ensuring that the connection between the pipeline body and the mechanical connector can withstand external forces.

[0013] That is, by installing mechanical connectors at the ends of the two disconnected pipe bodies, the ends of the two pipe bodies are provided with connecting flanges; then, the staff installs a repair pipe with a connecting flange between the two mechanical connectors and connects the mechanical connector to the repair pipe flange; thereby forming a good mechanical connection between the two pipe bodies, and the mechanical connector provides good sealing and gripping capabilities for the pipe body.

[0014] To sum up: the mechanical connector of the present application is sleeved on the pipe body to be repaired, and by applying force to the pulling structure, a stable mechanical connection and a well-sealed connection can be achieved between the mechanical connector and the pipe body, so as to quickly and conveniently repair damaged pipe systems in the ocean.

[0015] Optionally, the tensioning structure includes a first tensioning screw and a first tensioning nut; the outer periphery of the locking sleeve has a first connecting protrusion ring, and the fixed sleeve has a second connecting protrusion ring, the first connecting protrusion ring and the second connecting protrusion ring are provided with mounting holes for the first tensioning screw to pass through, and the first tensioning nut is arranged at both ends of the first tensioning screw; the first tensioning nut is threadedly connected to the first tensioning screw, and when a mechanical force is applied to the first tensioning nut, the locking sleeve and all sealing sleeves are forced to approach the fixed sleeve.

[0016] By adopting the above technical solution, a mechanical force is applied to the first pair of tension nuts through professional equipment, so that the locking sleeve and the sealing sleeve move toward the fixed sleeve; the installation speed and convenience of the mechanical connection between the mechanical connector and the pipeline body are improved.

[0017] Optionally, the sealing sleeve and the fixed sleeve are arranged to form a receiving groove for accommodating the sealing structure; the sealing structure includes a sealing ring and a sealing guide; the outer ring of the sealing ring is sealed with the sealing sleeve, and the inner ring of the sealing ring is used to be sealed with the pipeline body; one side of the sealing guide is abutted and fixed with the sealing ring, and 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, and the first sealing guide surface is abutted and fixed with the second sealing guide surface; when the sealing sleeve and the fixed sleeve approach each other, the cross-section of the receiving groove is reduced to squeeze the sealing ring, and the second sealing guide surface forces the first sealing guide surface to move toward the pipeline body, and the sealing guide applies a force toward the pipeline body to the sealing ring, so that the sealing ring seals the gap between the sealing sleeve and the pipeline body.

[0018] 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 closer, the compression deformation of the sealing ring in the radial direction of the sealing sleeve can be increased, thereby further improving the sealing between the sealing sleeve and the pipeline body.

[0019] Optionally, the locking structure includes a limit assembly and a locking assembly, wherein the locking assembly is arranged between the limit assembly and the locking sleeve; the inner peripheral wall of the locking sleeve has a locking guide surface, and the distance from the locking guide surface to the central axis of the locking sleeve decreases along the direction away from the sealing sleeve; the locking assembly is annularly spaced on the inner periphery of the locking sleeve, and the locking assembly 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, and the locking column is provided with a limiting groove at one end away from the locking rod, and the limiting groove is used to accommodate the locking ball, and the locking column and the locking ball are in contact with each other. The locking guide surface; the limit assembly includes a limit sleeve, a guide rod and a fixing bolt; the inner circumferential wall of the locking sleeve is provided with a limit groove, the limit sleeve is arranged in the limit groove, and the side wall of the limit groove away from the sealing sleeve is the first groove side wall; the locking sleeve is penetrated by a first limit hole, the limit sleeve is provided with a second limit hole, the fixing bolt is passed through the first limit hole and the second limit hole, the locking sleeve is penetrated by a waist-shaped guide through hole, the guide rod is provided in the waist-shaped guide through hole, and the guide rod is fixedly connected to the limit sleeve, the locking sleeve moves along the axial direction of the locking sleeve, the limit sleeve is provided with a through hole for the locking ball to pass through, and the limit sleeve has a support portion for supporting the locking ball;

[0020] When the fixing bolt is fixedly connected to the limiting sleeve, an avoidance distance is provided between the limiting sleeve and the side wall of the first groove, and the locking ball is provided on the supporting portion; when the fixing bolt is separated from the limiting sleeve, the locking assembly forces the locking sleeve to move away from the sealing sleeve, the locking ball passes through the penetration hole, and the locking ball abuts against the pipe body; when the pulling structure drives the locking sleeve close to the fixed sleeve, the locking guide surface squeezes the locking ball, and the locking ball rolls out a locking pit on the outer peripheral wall of the pipe body.

[0021] 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 assembly, so that the locking ball is set between the locking sleeve and the limiting sleeve, so that the pipe body can be inserted into the mechanical connector. Subsequently, the connection between the fixing bolt and the limiting sleeve is released, and the locking sleeve in the locking assembly applies a force to the limiting sleeve in a direction away from the sealing sleeve, so that the limiting sleeve moves away from the sealing sleeve; at this time, the locking ball separates from the limiting sleeve, and the locking spring extends to force the locking ball to move along the locking wire surface. After the locking ball is inserted into the penetration hole, it abuts against the pipe body. The multiple locking balls apply mechanical force to the pipe body to initially fix the pipe body.

[0022] Subsequently, when the tensioning structure pulls the locking sleeve toward the fixed sleeve, the locking ball disposed between the locking sleeve's fastening guide surface and the pipe body causes the locking sleeve to exert a force on the locking ball toward the sealing sleeve and toward the pipe body. Consequently, the locking ball crushes a locking recess on the outer peripheral wall of the pipe body, causing the pipe body to limit the locking ball and prevent it from moving toward the fixed sleeve. Under the action of the tensioning assembly, the locking sleeve moves closer to the fixed sleeve, further increasing the force exerted by the locking guide surface on the locking ball. This improves the mechanical connector's ability to hold the pipe body, increases the connection strength between the mechanical connector and the pipe body, and further enhances the stability of the mechanical connection between the mechanical connector and the pipe body.

[0023] Optionally, the support portion is provided with the through hole, and the side wall of the through hole is provided with a supporting surface for supporting the locking ball.

[0024] By adopting the above technical solution, before installation, the locking ball is arranged on the side wall of the transmission hole; when 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 in the direction away from the sealing sleeve, thereby facilitating the locking ball to pass through the penetration hole, so that the locking ball can quickly abut against the pipe body.

[0025] Optionally, when the pulling structure drives the locking sleeve and the fixing sleeve to approach each other, the side wall of the first groove pushes the limiting sleeve, and the side wall of the through hole abuts against the locking ball.

[0026] By adopting the above technical solution, the limiting sleeve abuts against the locking ball, that is, the limiting sleeve has a limiting effect on the locking ball after installation; the occurrence of displacement of the locking ball due to external vibration is reduced, the connection stability between the locking sleeve, the locking ball and the pipe body is improved, and the stability of the mechanical connection between the mechanical connector and the pipe body is improved.

[0027] Optionally, the limiting sleeve also has a fragile part, which is arranged on both sides of the supporting part along the annular direction of the limiting sleeve, and the supporting part has the supporting surface for supporting the locking ball; when the side wall of the first groove pushes the limiting sleeve toward the sealing sleeve, the fragile part of the limiting sleeve abuts against the locking ball, and after the fragile part and the locking ball are squeezed and damaged, the supporting part of the limiting sleeve abuts against the locking ball, and the fragile part falls to the periphery of the locking ball.

[0028] By adopting the above technical solution, by providing fragile portions on both sides of the support portion, the fragile portions and the locking ball are crushed by compression, and the fragments of the fragile portions fall around the locking ball, thereby limiting the locking ball. This reduces the risk of the locking ball falling out of the locking pit or limiting groove when the mechanical connector is subjected to external vibration, further improving the stability of the mechanical connection between the mechanical connector and the pipe body.

[0029] Optionally, a reinforcement structure is also included; a plug-in groove is provided on the outer circumference of the locking sleeve, and a sliding groove is provided on the inner circumference of the locking sleeve, and the plug-in groove is communicated with the sliding groove; a sliding member is provided in the locking sleeve, and the sliding member is arranged in the sliding groove, the locking column is fixedly connected to the sliding member, and the locking spring abuts against the sliding member; the sliding member is slidingly connected to the locking sleeve, and the sliding direction of the sliding member is consistent with the guide direction of the locking guide surface; the reinforcement structure includes a driving member, and the driving member is arranged between the sliding member and the groove side wall of the plug-in groove, and the driving member forces the sliding member to move away from the sealing sleeve.

[0030] By adopting the above technical solution, since the locking ball rolls out a locking pit on the outer peripheral wall of the pipe body, the pipe body has a limiting effect on the locking ball, so that the movement of the locking sleeve is greater than the movement of the locking ball, the length of the locking spring is increased, and the force of the locking spring on the locking ball is reduced, and the limiting effect of the locking column on the locking ball is also reduced.

[0031] In this application, a driving member forces the sliding member away from the sealing sleeve, causing it to move toward the locking ball, compressing the locking spring. This increases the force exerted by the locking spring on the locking ball, thereby enhancing the locking column's ability to retain the locking ball. This reduces the risk of the locking ball dislodging from the locking recess or retaining groove when the mechanical connector is subjected to external vibrations, further enhancing the stability of the mechanical connection between the mechanical connector and the pipe body.

[0032] Optionally, the reinforcement structure also includes a moving component, which includes a second tensioning screw, a second tensioning nut, an elastic compression member and an extrusion member; the locking sleeve is provided with a first connecting protrusion and a fourth connecting protrusion at intervals on the outer periphery, the fourth connecting protrusion is provided on the side of the first connecting protrusion close to the sealing sleeve, the first connecting protrusion and the fourth connecting protrusion are provided with mounting holes for the second tensioning screw to pass through, and threaded sections are provided at both ends of the second tensioning screw that are threadedly connected to the second tensioning nut, the driving member is fixedly connected to the second tensioning screw, the extrusion member is provided on the side of the fourth connecting protrusion close to the sealing sleeve, the extrusion member is provided with a through hole for the second tensioning screw to pass through, and the elastic compression member is provided between the fourth connecting protrusion and the extrusion member; when mechanical force is applied to the second tensioning nut away from the sealing sleeve, the second tensioning screw and the driving member move in a direction away from the sealing sleeve.

[0033] By adopting the above technical solution, professional equipment is used to apply mechanical force to the second tension nut away from the sealing sleeve, so that the second tension screw and the driving part move in the direction away from the sealing sleeve; thereby quickly and conveniently pushing the sliding part to slide, causing the sliding part to compress the locking spring, thereby improving the installation efficiency and convenience of the mechanical connector.

[0034] 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 plug-in slot, the driving plate is provided with a through hole for the second pair of tensioning screws to pass through, the limiting plate is fixed on the driving plate, and the limiting plate is fixedly connected to the second pair of tensioning screws.

[0035] By adopting the above technical solution, the limiting plate is fixedly connected to the second tension screw rod, so as to facilitate the installation and fixation of the strengthened structure.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. The mechanical connector of this application is mounted on the pipeline to be repaired. By applying force to the tensioning structure, a stable mechanical connection and a good sealing connection can be achieved between the mechanical connector and the pipeline, thereby quickly and conveniently repairing damaged pipeline systems in the ocean.

[0038] 2. By providing sealing guides on both sides of the sealing ring, when the sealing sleeve and the fixed sleeve slide closer together, the compression deformation of the sealing ring in the radial direction of the sealing sleeve can be increased, thereby further improving the sealing performance between the sealing sleeve and the pipeline body;

[0039] 3. When the tensioning structure pulls the locking sleeve toward the fixed sleeve, the locking ball disposed between the locking sleeve's fastening guide surface and the pipe body causes the locking sleeve to exert a force on the locking ball toward the sealing sleeve and toward the pipe body. Consequently, the locking ball crushes a locking recess on the outer peripheral wall of the pipe body, causing the pipe body to limit the locking ball and prevent it from moving toward the fixed sleeve. Under the action of the tensioning assembly, the locking sleeve moves closer to the fixed sleeve, further increasing the force exerted by the locking guide surface on the locking ball. This improves the mechanical connector's ability to grip the pipe body, enhances the connection strength between the mechanical connector and the pipe body, and further enhances the stability of the mechanical connection between the mechanical connector and the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural diagram embodying the marine pipeline maintenance principle in Example 1.

[0041] Figure 2 This is an isometric view of the mechanical connector in Example 1.

[0042] Figure 3 It is a cross-sectional view showing the internal structure of the mechanical connector in Example 1.

[0043] Figure 4 It is a cross-sectional view of the mechanical connector in Example 1.

[0044] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0045] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0046] Figure 7 yes Figure 4 Enlarged view of point C in the middle.

[0047] Figure 8 yes Figure 7 The enlarged image of D is shown in the figure.

[0048] Figure 9 2 is a cross-sectional view of the mechanical connector through the fixing bolts in Example 1.

[0049] Figure 10 yes Figure 9 Enlarged view of point E in the middle.

[0050] Figure 11 It is a schematic diagram of the locking structure after the fixing bolt and the limiting sleeve are separated.

[0051] Figure 12This is a schematic diagram of the locking structure after the locking guide surface squeezes the locking ball toward the sealing sleeve.

[0052] Figure 13 yes Figure 12 Enlarged view of point F in the middle.

[0053] Figure 14 It is a cross-sectional view of the mechanical connector in Example 2.

[0054] Figure 15 yes Figure 14 Enlarged view of point G in the middle.

[0055] Figure 16 It is a schematic diagram of the limiting sleeve structure in Example 2.

[0056] Explanation of the reference numerals: 11. Pipe body; 111. Locking recess; 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 guide through hole; 216. Insertion groove; 217. Sliding groove; 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. Pulling structure; 31. First pulling screw; 32. First pulling nut; 4. Sealing structure; 41. Sealing ring; 42. Sealing guide; 421. Notch ;5. Locking structure;51. Limiting assembly;511. Limiting sleeve;5111. Second limiting hole;5112. Penetrating hole;5113. Support part;5114. Fragile part;5115. Dividing groove;512. Guide rod;513. Fixing bolt;52. Locking assembly;521. Locking rod;522. Locking spring;523. Locking column;5231. Locking groove;5232. Limiting groove;524. Locking ball;6. Reinforcement structure;61. Moving assembly;611. Second tensioning screw;612. Second tensioning nut;613. Elastic compression member;614. Extrusion member;62. Driving member;621. Driving plate;622. Limiting plate;623. Connecting bolt;7. Sliding member. DETAILED DESCRIPTION

[0057] The following is combined with Figure 1 -16 Provide further details on this application.

[0058] Example 1

[0059] The embodiment of the present application discloses a marine pipeline maintenance mechanical connector. Figure 1 and Figure 2When a localized damage occurs in an ocean pipeline, the damaged section of the ocean pipeline is first cut off, leaving the two sections of the pipeline body 11 facing each other. The technical solution of this application installs a mechanical connector at the ends of the two disconnected sections of the pipeline body 11, so that both ends of the two sections of the pipeline body 11 are provided with a connecting flange 12. Subsequently, the staff installs a repair pipe 13 with a connecting flange 12 between the two mechanical connectors and flange-connects the mechanical connector to the repair pipe 13. This forms a good mechanical connection between the two sections of the pipeline body 11, and the mechanical connector provides good sealing and gripping capabilities for the pipeline body 11.

[0060] The marine pipeline maintenance mechanical connector comprises a connecting sleeve 2, a pulling structure 3, a sealing structure 4 and a locking structure 5.

[0061] Reference Figure 3 and Figure 4 The connecting sleeve 2 is provided with an installation channel for inserting and securing the pipe body 11. Along the insertion direction of the pipe body 11, the connecting sleeve 2 comprises a locking sleeve 21, a sealing sleeve 22, and a fixing sleeve 23. The sealing sleeve 22 and the fixing sleeve 23 are connected by sliding insertion. The tensioning structure 3 connects the locking sleeve 21, sealing sleeve 22, and fixing sleeve 23 into a single unit; at this time, a reserved space is provided between the sealing sleeve 22 and the fixing sleeve 23 to allow them to approach each other. In this embodiment, the locking sleeve 21 is composed of several sleeve segments, each with a stepped surface on both sides.

[0062] Reference Figure 5 and Figure 6 The sealing sleeve 22 and the fixed sleeve 23 enclose a receiving groove 25 for accommodating the sealing structure 4. The sealing structure 4 is compressible, so that before the mechanical connector is mechanically connected to the pipe body 11, a reserved space is provided between the sealing sleeve 22 and the fixed sleeve 23, allowing them to approach each other. In this embodiment, two sealing structures 4 are provided at intervals, and two sealing sleeves 22 are provided accordingly; one sealing structure 4 is located between the two sealing sleeves 22, and the other sealing structure 4 is located between the sealing sleeve 22 and the fixed sleeve 23. The sealing sleeve 22 may also be provided with a detection ring groove, located between the two sealing structures 4, for detecting water pressure.

[0063] A connecting flange 12 is provided on the side of the fixing sleeve 23 away from the sealing sleeve 22 , and the pipe body 11 is fixedly abutted against the fixing sleeve 23 ; the fixing sleeve 23 is used to be fixedly connected to the connecting pipe to reconnect the two sections of the pipe body 11 .

[0064] Reference Figure 3 and Figure 4, there are several tensioning structures 3, which are arranged at annular intervals along the outer circumference of the connecting sleeve 2. The tensioning structures 3 are used to pull the locking sleeve 21 and the sealing sleeve 22 close to the fixed sleeve 23. The tensioning structure 3 includes a first tensioning screw 31 and a first tensioning nut 32; the outer circumference of the locking sleeve 21 has a first connecting protrusion 211, the fixed sleeve 23 has a second connecting protrusion 231, and the sealing sleeve 22 has a third connecting protrusion 221. The first connecting protrusion 211, the second connecting protrusion 231 and the third connecting protrusion 221 are provided with mounting holes for the first tensioning screw 31 to pass through, and the first tensioning nut 32 is provided at both ends of the first tensioning screw 31; the first tensioning nut 32 is threadedly connected to the first tensioning screw 31. When a mechanical force is applied to the first tensioning nut 32, the locking sleeve 21 and all the sealing sleeves 22 are forced to approach the fixed sleeve 23.

[0065] In this embodiment, a hydraulic drive device is pre-installed at the end of the first tensioning screw 31 away from the sealing sleeve 22, and the hydraulic drive device is used to drive the first tensioning nut 32 to rotate, so as to shorten the distance between the two first tensioning nuts 32, thereby forcing the locking sleeve 21 and the sealing sleeve 22 to approach the fixed sleeve 23.

[0066] Reference 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 sealed with the sealing sleeve 22, and the inner ring of the sealing ring 41 is used to be sealed with the pipeline body 11; one side of the sealing guide 42 is fixedly abutted against the sealing ring 41.

[0067] Reference Figure 6 and Figure 7 The other side of the sealing guide 42 is provided with a first sealing guide surface, and the sidewall of the receiving groove 25 is provided with a second sealing guide surface. The first sealing guide surface and the second sealing guide surface are fixedly abutted against each other. When the sealing sleeve 22 and the fixed sleeve 23 approach each other, the cross-section of the receiving groove 25 decreases, squeezing the sealing ring 41. The second sealing guide surface forces the first sealing guide surface toward the pipeline body 11. The sealing guide 42 exerts a force on the sealing ring 41 toward the pipeline body 11, causing the sealing ring 41 to seal the gap between the sealing sleeve 22 and the pipeline body 11. By providing the sealing guides 42 on both sides of the sealing ring 41, the radial compression deformation of the sealing ring 41 relative to the sealing sleeve 22 is increased when the sealing sleeve 22 and the fixed sleeve 23 slide toward each other, further improving the sealing between the sealing sleeve 22 and the pipeline body 11. The sealing ring 41 can be a rubber, graphite, or metal pressure seal. In this embodiment, the sealing guide 42 is an annular structure with a notch 421, which allows the sealing guide 42 to retract under the extrusion force.

[0068] Reference Figure 8 and Figure 9The locking structure 5 is disposed on the inner circumferential wall of the locking sleeve 21 and includes a limiting assembly 51 and a locking assembly 52. The locking assembly 52 is disposed between the limiting assembly 51 and the locking sleeve 21. The inner circumferential wall of the locking sleeve 21 has a locking guide surface 212. The distance from the locking guide surface 212 to the central axis of the locking sleeve 21 decreases as it moves away from the sealing sleeve 22.

[0069] The locking assemblies 52 are arranged in an annular pattern on the inner circumference of the locking sleeve 21, and multiple groups of the annular locking assemblies 52 are arranged at intervals along the axis of the locking sleeve 21. The locking assemblies 52 include a locking rod 521, a locking spring 522, a locking post 523, and a locking ball 524. The locking rod 521 is fixedly connected to the locking sleeve 21, and the locking spring 522 is sleeved on the outer circumference of the locking rod 521. The locking post 523 has a locking groove 5231 for accommodating the locking spring 522. The locking post 523 has a retaining groove 5232 at one end away from the locking rod 521. The retaining groove 5232 is used to accommodate the locking ball 524. The locking rod 523 and the locking ball 524 are in contact with the locking guide surface 212.

[0070] Reference Figure 8 、 Figure 10 and Figure 11 The limiting assembly 51 includes a limiting sleeve 511 , a guide rod 512 and a fixing bolt 513 .

[0071] The inner wall of the locking sleeve 21 is provided with a limiting groove 213, and the limiting sleeve 511 is arranged in the limiting groove 213. The side wall of the limiting groove 213 away from the sealing sleeve 22 is the first groove side wall 2131; the locking sleeve 21 is penetrated to form a first limiting hole 214, and the limiting sleeve 511 is provided with a second limiting hole 5111. The fixing bolt 513 is passed through the first limiting hole 214 and the second limiting hole 5111. The locking sleeve 21 is penetrated by a waist-shaped guide through hole 215, and the guide rod 512 is provided in the waist-shaped guide through hole 215, and the guide rod 512 is fixedly connected to the limiting sleeve 511. The locking sleeve 21 moves along the axial direction of the locking sleeve 21. The limiting sleeve 511 is provided with a penetration hole 5112 for the locking ball 524 to penetrate, and the limiting sleeve 511 has a support portion 5113 for supporting the locking ball 524. In this embodiment, the support portion 5113 defines a through hole 5112 , and a sidewall of the through hole 5112 defines a support surface for supporting the locking ball 524 .

[0072] Reference Figure 9Before the mechanical connector is mechanically connected to the pipe body 11, the fixing bolt 513 is fixedly connected to the limiting sleeve 511. A clearance distance is provided between the limiting sleeve 511 and the first groove sidewall 2131. The locking ball 524 is disposed on the support portion 5113. In other words, the locking sleeve 21 limits the locking assembly 52, so that the locking ball 524 is disposed between the locking sleeve 21 and the limiting sleeve 511, thereby facilitating the insertion of the pipe body 11 into the mechanical connector.

[0073] Reference Figure 11 During the mechanical connection between the mechanical connector and 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 to the limiting sleeve 511 away from the sealing sleeve 22, causing the limiting sleeve 511 to move away from the sealing sleeve 22. At this point, the locking balls 524 separate from the limiting sleeve 511, and the locking spring 522 extends, forcing the locking balls 524 to move along the locking wire surface. After being inserted into the penetration hole 5112, the locking balls 524 abut against the pipe body 11. Several locking balls 524 exert mechanical force on the pipe body 11 to initially secure the pipe body 11.

[0074] Reference Figure 12 and Figure 13 Subsequently, as the tensioning structure 3 pulls the locking sleeve 21 toward the fixed sleeve 23, the locking balls 524 are positioned between the fastening guide surface of the locking sleeve 21 and the pipe body 11, causing the locking sleeve 21 to exert a force on the locking balls 524 toward the sealing sleeve 22 and toward the pipe body 11. Consequently, the locking balls 524 press into the outer circumferential wall of the pipe body 11 to form locking recesses 111, which restrict the locking balls 524 from moving toward the fixed sleeve 23. In this embodiment, the rigidity of the locking sleeve 21 and the locking balls 524 is greater than that of the pipe body 11. Consequently, when the locking sleeve 21 forces the locking balls 524 to press against the pipe body 11, the outer circumference of the pipe body 11 undergoes plastic deformation, forming the locking recesses 111.

[0075] Reference Figure 12 and Figure 13 , and under the action of the pulling assembly, the locking sleeve 21 moves further closer to the fixed sleeve 23, further increasing the force exerted by the locking guide surface 212 on the locking ball 524; thereby improving the mechanical connector's ability to hold the pipe body 11, increasing the connection strength between the mechanical connector and the pipe body 11, and further improving the stability of the mechanical connection between the mechanical connector and the pipe body 11.

[0076] When the tensioning structure 3 drives the locking sleeve 21 and the fixing sleeve 23 toward each other, the first groove sidewall 2131 pushes the limiting sleeve 511, causing the limiting sleeve 511 to move toward the sealing sleeve 22 until the sidewall of the through hole 5112 abuts the locking ball 524. The limiting sleeve 511 abuts the locking ball 524, meaning that the limiting sleeve 511 limits the locking ball 524 after installation. This reduces the possibility of the locking ball 524 shifting due to external vibration, improves the connection stability between the locking sleeve 21, the locking ball 524, and the pipe body 11, and improves the mechanical stability of the mechanical connector and the pipe body 11.

[0077] The implementation principle of a marine pipeline repair mechanical connector in the embodiment of the present application is as follows:

[0078] Reference Figure 1 , the staff hoisted the mechanical connector to the pipeline body 11 in the ocean, and inserted the pipeline body 11 into the mechanical connector.

[0079] Reference Figures 2 to 4 Subsequently, the staff used professional equipment to apply mechanical force to the tensioning structure 3, so that the tensioning structure 3 drove the locking sleeve 21 and the sealing sleeve 22 close to the fixed sleeve 23; so that the sealing structure 4 sealed the gap between the sealing sleeve 22 and the pipe body 11 to prevent the medium in the pipe body 11 from leaking; at the same time, the locking sleeve 21 applied mechanical fastening force to the pipe body 11 through the locking structure 5 to improve the mechanical connection stability between the mechanical connector and the pipe body 11, and ensure that the connection part between the pipe body 11 and the mechanical connector can withstand external forces.

[0080] That is, by installing mechanical connectors at the ends of the two disconnected pipe bodies 11, the ends of the two pipe bodies 11 are both provided with connecting flanges 12; then, the staff installs the repair pipe 13 with the connecting flange 12 between the two mechanical connectors, and connects the mechanical connector to the repair pipe 13 flange; thereby forming a good mechanical connection between the two pipe bodies 11, and the mechanical connector provides good sealing and gripping capabilities for the pipe body 11.

[0081] In summary: the mechanical connector of the present application is sleeved on the pipe body 11 to be repaired, and by applying force to the pulling structure 3, a stable mechanical connection and a well-sealed connection can be achieved between the mechanical connector and the pipe body 11, so as to quickly and conveniently repair damaged pipe systems in the ocean.

[0082] Example 2

[0083] The difference between this embodiment 2 and embodiment 1 is that:

[0084] Reference Figure 14 and Figure 15 The mechanical connector further includes a reinforcing structure 6 , which includes a moving component 61 and a driving component 62 .

[0085] Reference Figure 15 The locking sleeve 21 has an inserting groove 216 defined on its outer circumference, and a sliding groove 217 defined on its inner circumference. The inserting groove 216 and the sliding groove 217 are interconnected. The locking sleeve 21 is provided with a sliding member 7 disposed in the sliding groove 217. The locking post 523 is fixedly connected to the sliding member 7, and the locking spring 522 abuts against the sliding member 7. The sliding member 7 is slidably connected to the locking sleeve 21, and the sliding direction of the sliding member 7 is consistent with the guide direction of the locking guide surface 212. The driving member 62 is disposed between the sliding member 7 and the sidewall of the inserting groove 216, and the driving member 62 forces the sliding member 7 away from the sealing sleeve 22. In this embodiment, the inserting groove 216 is an annular groove having a certain width to simultaneously drive multiple annularly arranged locking assemblies 52.

[0086] Reference Figure 14 and Figure 15 The moving assembly 61 includes a second tensioning screw 611, a second tensioning nut 612, an elastic compression member 613 and an extrusion member 614; the outer periphery of the locking sleeve 21 is further provided with a fourth connecting convex ring 218, 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 tensioning screw 611 to pass through, and both ends of the second tensioning screw 611 are provided with threaded connections with the second tensioning nut 612 The threaded section of the drive member 62 is fixedly connected to the second tensioning screw 611. The extrusion member 614 is disposed on the side of the fourth connecting protrusion 218 near the sealing sleeve 22. The extrusion member 614 has a through hole for the second tensioning screw 611 to pass through. The elastic compression member 613 is disposed between the fourth connecting protrusion 218 and the extrusion member 614. When mechanical force is applied to the second tensioning nut 612 away from the sealing sleeve 22, the second tensioning screw 611 and the drive member 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, silicone, metal pressure seal, etc.

[0087] Reference Figure 15The 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 side wall of the insertion slot 216. The driving plate 621 has a through hole for the second tensioning screw 611 to pass through. The limiting plate 622 is fixed to the driving plate 621 and is fixedly connected to the second tensioning screw 611. The limiting plate 622 is fixedly connected to the second tensioning screw 611 to facilitate the installation and fixation of the reinforcement structure 6. In this embodiment, the limiting plate 622 and the second tensioning screw 611 are fixedly connected by a connecting bolt 623; the limiting plate 622 and the second tensioning screw 611 have through holes for the connecting bolt 623 to pass through.

[0088] The implementation principle of a marine pipeline repair mechanical connector in the embodiment of the present application is as follows:

[0089] Reference Figure 14 and Figure 15 Since the locking ball 524 rolls out a locking recess 111 on the outer wall of the pipe body 11, the pipe body 11 has a limiting effect on the locking ball 524, so that the movement of the locking sleeve 21 is greater than the movement of the locking ball 524, and the length of the locking spring 522 increases, so that the force of the locking spring 522 on the locking ball 524 decreases, and the limiting effect of the locking column 523 on the locking ball 524 also decreases.

[0090] Reference Figure 14 and Figure 15 , use professional equipment to apply mechanical force to the second tension nut 612 away from the sealing sleeve 22, so that the second tension screw 611 and the driving member 62 move in the direction away from the sealing sleeve 22; thereby quickly and conveniently pushing the sliding member 7 to slide, so that the sliding member 7 compresses the locking spring 522, thereby improving the installation efficiency and convenience of the mechanical connector.

[0091] Reference Figure 14 and Figure 15 In this application, the driving member 62 forces the sliding member 7 away from the sealing sleeve 22, causing the sliding member 7 to move toward the locking ball 524, thereby compressing the locking spring 522. This increases the force of the locking spring 522 on the locking ball 524, thereby improving the retaining effect of the locking column 523 on the locking ball 524. This reduces the risk of the locking ball 524 disengaging from the locking recess 111 and the retaining groove 5232 when the mechanical connector is subjected to external vibrations, thereby further improving the stability of the mechanical connection between the mechanical connector and the pipe body 11.

[0092] Example 3

[0093] The difference between this embodiment 3 and embodiment 2 is that:

[0094] Reference Figure 16The limiting sleeve 511 also has a fragile part 5114. Along the annular direction of the limiting sleeve 511, the fragile part 5114 is arranged on both sides of the support part 5113, and the support part 5113 has a supporting surface for supporting the locking ball 524; when the first groove side wall 2131 pushes the limiting sleeve 511 toward the sealing sleeve 22, the fragile part 5114 of the limiting sleeve 511 abuts against the locking ball 524. After the fragile part 5114 and the locking ball 524 are squeezed and damaged, the support part 5113 of the limiting sleeve 511 abuts against the locking ball 524, and the fragile part 5114 falls to the periphery of the locking ball 524. In this embodiment, the limiting sleeve 511 is a plastic part. By providing a plurality of dividing grooves 5115 on the fragile part 5114 of the limiting sleeve 511 , the rigidity of the fragile part 5114 of the limiting sleeve 511 is reduced, thereby facilitating the destruction of the fragile part 5114 .

[0095] The implementation principle of a marine pipeline repair mechanical connector in the embodiment of the present application is as follows:

[0096] Reference Figure 16 By providing fragile portions 5114 on both sides of the support portion 5113, after the fragile portions 5114 and the locking ball 524 are squeezed and crushed, the fragments of the fragile portions 5114 will fall around the locking ball 524, and the fragments of the fragile portions 5114 will have a limiting effect on the locking ball 524. This can reduce the risk of the locking ball 524 being separated from the locking pit 111 and the limiting groove 5232 when the mechanical connector is subjected to external vibration, thereby further improving the stability of the mechanical connection between the mechanical connector and the pipe body 11.

[0097] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A marine pipeline maintenance mechanical connector, the mechanical connector is used to connect two disconnected pipeline bodies (11); it is characterized by: The invention comprises a connecting sleeve (2), a tensioning structure (3), a sealing structure (4) and a locking structure (5); the connecting sleeve (2) is provided with an installation channel for the pipe body (11) to be plugged and fixed, and along the plugging direction of the pipe body (11), the connecting sleeve (2) sequentially comprises a locking sleeve (21), a sealing sleeve (22) and a fixing sleeve (23), the sealing sleeve (22) and the fixing sleeve (23) are connected by sliding plugging, the fixing sleeve (23) is provided with a connecting flange (12) on the side away from the sealing sleeve (22), and the pipe body (11) and the fixing sleeve (23) are abutted and fixed; the tensioning structures (3) are provided in plurality, and the plurality of tensioning structures (3) are arranged at intervals along the outer circumference of the connecting sleeve (2). The pulling structure (3) is used to pull the locking sleeve (21) and the sealing sleeve (22) close to the fixed 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 pulling structure (3) pulls the locking sleeve (21) and the fixed sleeve (23) close to each other, the locking sleeve (21) applies a mechanical fastening force to the pipe body (11) through the locking structure (5), the sealing sleeve (22) and the fixed 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 pipe body (11); The locking structure (5) includes a limiting component (51) and a locking component (52), wherein 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 guide surface (212), and the distance from the locking guide surface (212) to the central axis of the locking sleeve (21) decreases along the direction away from the sealing sleeve (22); the locking component (52) is arranged at an annular interval on the inner periphery of the locking sleeve (21), and 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), the locking column (523) is provided with a limiting groove (5232) at one end away from the locking rod (521), the limiting groove (5232) is used to accommodate the locking ball (524), the locking column (523) and the locking ball (524) are affixed to the locking guide surface (212); the limiting assembly (51) includes a limiting sleeve (511), a guide 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 groove side wall of the limiting groove (213) away from the sealing sleeve (22) is a first groove side wall (2131); the locking sleeve (21) is penetrated to open a first limiting hole (214), the limiting sleeve (511) is provided with a second limiting hole (5111), the fixing bolt (513) is penetrated through the first limiting hole (214) and the second limiting hole (5111), the locking sleeve (21) is penetrated to open a waist-shaped guide through hole (215), and the guide rod (512) is arranged in the waist-shaped guide through hole (215), and the guide rod (512) is fixedly connected to the limiting sleeve (511), the locking sleeve (21) moves along the axial direction of the locking sleeve (21), the limiting sleeve (511) is provided with a penetration hole (5112) for the locking ball (524) to penetrate, and the limiting sleeve (511) has a support portion (5113) for supporting the locking ball (524); when the fixing bolt (513) is fixedly connected to the limiting sleeve (511), an avoidance distance is provided between the limiting sleeve (511) and the first groove side wall (2131), and the locking ball (524) is provided on the support portion (5113);When the fixing bolt (513) is separated from the limiting sleeve (511), the locking assembly (52) forces the locking sleeve (21) to move away from the sealing sleeve (22), the locking ball (524) penetrates the penetration hole (5112), and the locking ball (524) abuts against the pipe body (11); when the tensioning structure (3) drives the locking sleeve (21) to approach the fixing sleeve (23), the locking guide surface (212) squeezes 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); The limiting sleeve (511) further comprises a fragile portion (5114), which is arranged on both sides of the supporting portion (5113) along the annular direction of the limiting sleeve (511), and the supporting portion (5113) comprises a supporting surface for supporting the locking ball (524); when the first groove side wall (2131) pushes the limiting sleeve (511) toward the sealing sleeve (22), the fragile portion (5114) of the limiting sleeve (511) abuts against the locking ball (524), and after the fragile portion (5114) and the locking ball (524) are squeezed and broken, the supporting portion (5113) of the limiting sleeve (511) abuts against the locking ball (524), and the fragile portion (5114) falls to the periphery of the locking ball (524).

2. The marine pipeline repair mechanical connector according to claim 1, characterized in that: The tensioning structure (3) includes a first tensioning screw (31) and a first tensioning nut (32); the outer periphery of the locking sleeve (21) has a first connecting protrusion (211), and the fixed sleeve (23) has a second connecting protrusion (231); the first connecting protrusion (211) and the second connecting protrusion (231) are provided with mounting holes for the first tensioning screw (31) to pass through, and the first tensioning nut (32) is arranged at both ends of the first tensioning screw (31); the first tensioning nut (32) is threadedly connected to the first tensioning screw (31), and when a mechanical force is applied to the first tensioning nut (32), the locking sleeve (21) and all the sealing sleeves (22) are forced to approach the fixed 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) are arranged to form a receiving groove (25) for receiving the sealing structure (4); the sealing structure (4) comprises a sealing ring (41) and a sealing guide (42); the outer ring of the sealing ring (41) is sealedly connected to the sealing sleeve (22), and the inner ring of the sealing ring (41) is used for sealingly connecting to the pipeline body (11); one side of the sealing guide (42) is fixedly abutted against the sealing ring (41), and the other side of the sealing guide (42) is provided with a first sealing guide surface, and the side wall of the receiving groove (25) is provided with a sealing guide surface. There is 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 fixing sleeve (23) approach each other, the cross section of the accommodating groove (25) is reduced to squeeze the sealing ring (41), and the second sealing guide surface forces the first sealing guide surface to move toward the pipeline body (11), and the sealing guide (42) applies a force toward 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).

4. The marine pipeline repair mechanical connector according to claim 1, characterized in that: The support portion (5113) is provided with the penetration hole (5112), and the side wall of the penetration hole (5112) is provided with a support surface for supporting the locking ball (524).

5. The marine pipeline repair mechanical connector according to claim 1, characterized in that: When the pulling structure (3) drives the locking sleeve (21) and the fixing sleeve (23) to approach each other, the first groove side wall (2131) pushes the limiting sleeve (511), and the hole side wall of the through hole (5112) abuts against the locking ball (524).

6. The marine pipeline repair mechanical connector according to claim 1, characterized in that: The invention also includes a reinforcing structure (6); a plug-in groove (216) is provided on the outer peripheral side of the locking sleeve (21); a sliding groove (217) is provided on the inner peripheral side of the locking sleeve (21); the plug-in groove (216) and the sliding groove (217) are connected to each other; a sliding member (7) is provided in the locking sleeve (21); the sliding member (7) is provided in the sliding groove (217); the locking column (523) is fixedly connected to the sliding member (7); and the locking spring (5 22) abuts against the sliding member (7); the sliding member (7) is slidingly connected to the locking sleeve (21), and the sliding direction of the sliding member (7) is consistent with the guiding direction of the locking guide surface (212); the reinforcing structure (6) includes a driving member (62), and the driving member (62) is arranged between the sliding member (7) and the groove side wall of the plug-in groove (216), and the driving member (62) forces the sliding member (7) to move away from the sealing sleeve (22).

7. The marine pipeline repair mechanical connector according to claim 6, characterized in that: The reinforcing structure (6) further includes a moving assembly (61), and the moving assembly (61) includes a second tensioning screw (611), a second tensioning nut (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 provided on the outer periphery of the locking sleeve (21), and the fourth connecting convex ring (218) is provided 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 tensioning screw (611) to pass through; and the second tensioning screw (611) is provided with mounting holes at both ends thereof in contact with the second tensioning screw (611). The threaded section of the tension nut (612) is threadedly connected, the driving member (62) is fixedly connected to the second tension screw (611), the extrusion member (614) is arranged on the side of the fourth connecting protrusion (218) close to the sealing sleeve (22), the extrusion member (614) is provided with a through hole for the second tension screw (611) to pass through, and the elastic compression member (613) is arranged between the fourth connecting protrusion (218) and the extrusion member (614); when a mechanical force is applied to the second tension nut (612) away from the sealing sleeve (22), the second tension screw (611) and the driving member (62) move in a direction away from the sealing sleeve (22).

8. The marine pipeline repair mechanical connector according to claim 7, 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 side wall of the insertion groove (216), the driving plate (621) is provided with a through hole for the second tensioning screw (611) to pass through, the limiting plate (622) is fixed on the driving plate (621), and the limiting plate (622) is fixedly connected to the second tensioning screw (611).

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