A split-flap submarine pipeline connector

Abstract

The present invention relates to the field of submarine pipeline repair devices, and particularly to a split-flap submarine pipeline connector, comprising a supporting assembly, wherein the supporting assembly is inserted into a placement hole, the mechanical flange is connected to a flange plate via a stud, a compression nut is threadedly connected to the stud, and the compression nut is pressed on the flange plate, and the flange plate is pressed on the supporting assembly, and the compression nut is used to drive the supporting assembly to push the sealing assembly to move to the gap between the sealing pipe and the placement hole, the flange plate is threadedly connected to an adjusting screw, the end of the adjusting screw is provided with an upper pressure sleeve, the inner side of the upper pressure sleeve is provided with a slip, the upper pressure sleeve and the slip slide relative to each other, and the adjusting screw is used to press the upper pressure sleeve to push the slip to clamp the pipeline. Through the above structure, the pipeline sealing and pipeline clamping processes are independent of each other and do not affect each other, thereby reducing the situation where leakage is easy to occur after pipeline repair due to unified control of the two processes, and the repair effect of the pipeline is reduced.

Description

Technical Field

[0001] The present invention relates to the field of submarine pipeline repair devices, and in particular to a split-flap submarine pipeline connector. Background Art

[0002] Submarine pipeline connectors are mainly used for submarine pipeline maintenance. During the operation of submarine pipelines, natural disasters such as earthquakes or other impacts may cause pipeline damage and leakage. Submarine pipeline connectors can quickly plug or repair leaking pipelines. When repairing and connecting the pipeline, the leaking pipeline is cut off and separated into two sections. The two sections are then connected to a submarine pipeline connector respectively, and then the two submarine pipeline connectors are connected to each other.

[0003] Existing submarine pipeline connectors usually include a flange, an end cover with an inner hole, and a clamping structure and a sealing structure arranged in the inner hole of the flange. The flange and the end cover are connected by bolts and nuts, and one end of the end cover usually extends into the inner hole of the flange. When connecting the pipeline to the submarine pipeline connector, the pipeline to be repaired is first inserted into the inner hole of the flange through the inner hole of the end cover, and then the nut is tightened so that one end of the end cover applies pressure to the clamping structure and the sealing structure, causing the sealing structure to deform and the clamping structure to produce radial displacement, thereby achieving sealing and clamping of the pipeline to be repaired. For the specific process, please refer to the Chinese invention patent with announcement number CN116336271B previously applied for by the applicant, which discloses a mechanical connection flange structure for underwater pipelines. The pipe clamping and sealing processes are both triggered by the movement of the end cap, and the two processes are controlled uniformly. However, during the pipe repair and connection process, different forces need to be applied to the pipe clamping and sealing processes. This results in one of the pipe sealing or pipe clamping processes proceeding normally, while the other process cannot proceed normally due to excessive or insufficient force, which in turn makes the pipe prone to leakage after repair, reducing the repair effect of the pipe. Summary of the Invention

[0004] The technical solution adopted by the present invention to solve the technical problem is to provide a split-flap submarine pipeline connector, comprising:

[0005] A mechanical flange and a pipeline flange, wherein the mechanical flange and the pipeline flange are connected, the mechanical flange is provided with a placement hole for placing a pipeline, a sealing assembly is provided in the placement hole, and the sealing assembly is used to seal the gap between the pipeline and the placement hole;

[0006] It also includes a support assembly, which is inserted into the placement hole. The mechanical flange is connected to the flange through a stud. A clamping nut is threaded on the stud, and the clamping nut is pressed on the flange. The flange is pressed on the support assembly. The clamping nut is used to drive the support assembly to push the sealing assembly to move to the gap between the sealing pipe and the placement hole. The flange is threaded with an adjusting screw. The end of the adjusting screw is provided with an upper pressure sleeve, and the inner side of the upper pressure sleeve is provided with a slip. The upper pressure sleeve and the slip slide relative to each other, and the adjusting screw is used to press the upper pressure sleeve to push the slip to hold the pipe tightly.

[0007] Furthermore, the cava is provided with a first inclined surface on the side of the upper pressure sleeve close to the center axis of the placement hole compared to the upper pressure sleeve close to the center axis of the placement hole, and the cava is provided with a second inclined surface on the side away from the center axis of the placement hole. The end of the first inclined surface close to the adjusting screw is closer to the center axis of the placement hole than the end of the first inclined surface away from the adjusting screw, and the second inclined surface is adapted to the first inclined surface.

[0008] Furthermore, a plastic screw is provided between the upper pressure sleeve and the slip, and the upper pressure sleeve and the slip are connected by the plastic screw.

[0009] Furthermore, there are multiple upper pressure sleeves and cavas, and the upper pressure sleeves and cavas correspond to each other one by one. The support assembly includes an upper support ring and a lower support ring, and a plurality of ribs arranged between the upper support ring and the lower support ring. The ribs are arranged at intervals, and the corresponding upper pressure sleeves and cavas are located in the intervals between adjacent ribs.

[0010] Furthermore, the upper support ring is provided with an upper pressure sleeve fixing block, the adjusting screw is pressed on the upper pressure sleeve fixing block, the upper pressure sleeve is provided with a first groove corresponding to the upper pressure sleeve fixing block, and the upper pressure sleeve fixing block is clamped in the first groove.

[0011] Furthermore, the lower support ring is provided with a slip fixing block, the slip is provided with a second groove corresponding to the slip fixing block, the slip fixing block is clamped in the second groove, and the slip and the slip fixing block slide relative to each other along the radial direction of the placement hole.

[0012] Furthermore, the sealing assembly includes a first sealing limit ring, a second sealing limit ring, and a main seal and a secondary seal arranged between the first sealing limit ring and the second sealing limit ring. The first sealing limit ring transfers pressure to the main seal and the secondary seal and cooperates with the second sealing limit ring to deform the main seal and the secondary seal.

[0013] Furthermore, the first sealing limit ring and the second sealing limit ring both include an outer ring and an open elastic ring arranged on the inner wall of the outer ring. The inner wall of the outer ring is a downward sloping surface along the central axis direction of the placement hole. The support assembly transfers pressure to the open elastic ring and causes the open elastic ring to move downward along the inner wall of the outer ring until it is tightened in the direction close to the central axis of the placement hole.

[0014] Furthermore, the main seal and the secondary seal both include an L-shaped sealing ring, an O-shaped sealing ring, and a first pressure ring and a second pressure ring. The L-shaped sealing ring includes an axial portion arranged along the central axis of the placement hole and a radial portion arranged along the diameter direction of the placement hole. The second pressure ring is sleeved on the axial portion, and the O-shaped sealing ring is sleeved on the second pressure ring, and the O-shaped sealing ring is located between the radial portion and the first pressure ring. The first pressure ring pushes the second pressure ring along the central axis direction of the placement hole to tighten along the diameter direction of the placement hole.

[0015] Furthermore, the inner wall of the first pressure ring is an inner conical surface arranged along the central axis direction of the placement hole, the inner diameter of the end of the first pressure ring close to the flange is smaller than the inner diameter of the end of the first pressure ring away from the flange, and the outer periphery of the second pressure ring is an outer conical surface adapted to the inner wall of the first pressure ring.

[0016] The beneficial effect of the present invention is that by adjusting the setting of the screws and the support assembly, the two processes of pipeline sealing and pipeline clamping are made independent of each other and do not affect each other, thereby reducing the risk of leakage after pipeline repair due to unified control of the two processes, thereby reducing the repair effect of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] In the picture: Figure 1 This is an overall structural diagram of a split-type submarine pipeline connector provided by an embodiment of the present invention (when the pipeline is inserted);

[0019] Figure 2 for Figure 1 A top view of the split submarine pipeline connector shown when not installed in a pipeline;

[0020] Figure 3 for Figure 2 AA sectional view;

[0021] Figure 4 for Figure 3 The enlarged view of point A is shown;

[0022] Figure 5 for Figure 3 The enlarged view of point B is shown;

[0023] Figure 6 for Figure 3The enlarged view of point C is shown;

[0024] Figure 7 for Figure 1 The three-dimensional structure diagram of the support assembly, the upper pressure sleeve and the slips after being assembled with each other;

[0025] Figure 8 for Figure 7 an exploded view of the structure shown;

[0026] Figure 9 for Figure 6 An exploded view of the first sealing stop ring is shown;

[0027] Figure 10 for Figure 6 Exploded view of the primary seal shown.

[0028] Explanation of reference numerals: 10, mechanical flange; 11, placement hole; 111, first cavity; 112, second cavity; 113, step; 12, lifting ring; 13, first test hole; 20, support assembly; 21, adjusting screw; 22, upper pressure sleeve; 221, first inclined surface; 222, plastic screw; 223, first groove; 23, slip; 231, second inclined surface; 232, second groove; 233, tooth; 24, upper support ring; 241, upper pressure sleeve fixing block; 2411, first fixing groove; 25, lower support ring; 251, slip fixing block; 26, rib ;27. First support ring;30. Pipeline flange;41. First sealing limit ring;411. Outer ring;412. Open elastic ring;42. Second sealing limit ring;43. Main seal;431. L-shaped sealing ring;4311. Axial part;4312. Radial part;432. O-ring;433. First pressure ring;434. Second pressure ring;4341. Through groove;44. Secondary seal;45. Back pressure test ring;451. Second test hole;50. Flange;51. Stud;52. Mounting hole;53. Pressing nut;60. Plug;200. Pipeline. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is now described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic principles of the present invention in an illustrative manner, and therefore only shows the structures related to the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Please refer to Figure 1The present invention provides a split-flap submarine pipeline connector, including a mechanical flange 10 and a support assembly 20, and a pipeline flange 30 connected to the bottom end of the mechanical flange 10. The mechanical flange 10 and the pipeline flange 30 are connected by studs 51 and nuts.

[0031] Please refer to Figure 3 The mechanical flange 10 is provided with a placement hole 11 for placing the pipe 200. A sealing assembly is provided in the placement hole 11. The sealing assembly is used to seal the gap between the pipe 200 and the placement hole 11. The support assembly 20 is passed through the placement hole 11. Specifically, the placement hole 11 includes a first cavity 111 and a second cavity 112. The aperture of the first cavity 111 is larger than the aperture of the second cavity 112. A step 113 is formed at the junction of the first cavity 111 and the second cavity 112. When the pipe 200 is inserted into the placement hole 11, the end of the pipe 200 is located on the step 113 at the junction of the first cavity 111 and the second cavity 112. The support assembly 20 and the sealing assembly are both located in the first cavity 111. The sealing assembly is pressed on the step 113. When the pipe 200 is sealed, the step 113 supports the sealing assembly.

[0032] Please refer to Figure 3 The support assembly 20 includes an upper support ring 24, a lower support ring 25, and a plurality of ribs 26 disposed between the upper support ring 24 and the lower support ring 25. The ribs 26 are spaced apart, and the ribs 26 and the upper support ring 24 and the lower support ring 25 are fixed by screws. The mechanical flange 10 is connected to a flange 50 via studs 51. The flange 50 is pressed against the upper support ring 24, and the lower support ring 25 is pressed against the sealing assembly. A compression nut 53 is threadedly connected to the stud 51, and the compression nut 53 is pressed against the flange 50, which is then pressed against the support assembly 20. The compression nut 53 is used to push the flange 50 to slide along the stud 51, thereby pushing the support assembly 20 to press the sealing assembly to seal the gap between the pipe 200 and the placement hole 11.

[0033] Please refer to Figure 3 and Figure 8 The flange 50 is threadedly connected to an adjusting screw 21. An upper compression sleeve 22 is provided at the end of the adjusting screw 21. Slips 23 are located inside the upper compression sleeve 22. The adjusting screw 21 presses the upper compression sleeve 22, pushing the slips 23 to tighten against the pipe 200. Specifically, the inner wall of the slips 23 is provided with latches 233 for tightening the pipe 200. When tightening the pipe 200, the latches 233 form an interference fit with the outer circumference of the pipe 200.

[0034] Please refer to Figure 3 and Figure 4Compared with the upper pressure sleeve 22, the cava 23 is closer to the center axis of the placement hole 11. A first inclined surface 221 is provided on the side of the upper pressure sleeve 22 close to the center axis of the placement hole 11, and a second inclined surface 231 is provided on the side of the cava 23 away from the center axis of the placement hole 11. The end of the first inclined surface 221 close to the adjusting screw 21 is closer to the center axis of the placement hole 11 than the end of the first inclined surface 221 away from the adjusting screw 21, and the second inclined surface 231 is adapted to the first inclined surface 221.

[0035] When the pipe 200 is clamped, the first inclined surface 221 and the second inclined surface 231 cooperate with each other to push the upper pressure sleeve 22 to move, so that the cava 23 can be displaced in the radial direction of the placement hole 11, and the upper pressure sleeve 22 is farther away from the center axis of the placement hole 11 than the cava 23, so that when the upper pressure sleeve 22 moves away from the adjusting screw 21, the cava 23 moves toward the center axis of the placement hole 11, thereby achieving the clamping of the pipe 200.

[0036] Please refer to Figure 3 、 Figure 7 and Figure 8 Due to the complex construction environment on the seabed, when the pipeline 200 is inserted into the placement hole 11, there may be a situation where the pipeline 200 is eccentric relative to the placement hole 11. Therefore, multiple slips 23 and upper pressure sleeves 22 are evenly arranged along the inner wall of the placement hole 11. Correspondingly, multiple adjustment screws 21 are also provided, and the upper pressure sleeves 22 and slips 23 correspond one to one. The corresponding upper pressure sleeves 22 and slips 23 are all located in the interval between adjacent ribs 26, and each slip 23 is controlled separately. Specifically, each upper pressure sleeve 22 corresponds to an adjustment screw 21. When the pipeline 200 is eccentric relative to the placement hole 11, the radial sliding displacement of the slips 23 at different positions is controlled by the corresponding adjustment screws 21 according to the degree of eccentricity of the pipeline 200, thereby controlling the degree of grip of the slips 23 at different positions on the outer periphery of the pipeline 200 to improve the eccentricity of the pipeline 200 relative to the placement hole 11. This makes the split-flap submarine pipeline connector highly adaptable to the complex construction environment on the seabed and enhances the reliability and convenience of the pipeline 200 connection.

[0037] Please refer to Figure 4 、 Figure 7 and Figure 8 Since the slips 23 and the upper pressure sleeves 22 are evenly arranged in multiple numbers along the inner wall of the placement hole 11, and the corresponding upper pressure sleeves 22 and slips 23 are located in the intervals between adjacent ribs 26, there is a lack of connection between adjacent slips 23 and adjacent upper pressure sleeves 22, and the stability is insufficient. Therefore, it is necessary to set limit switches for the slips 23 and the upper pressure sleeves 22 on the upper support ring 24 and the lower support ring 25 respectively.

[0038] Specifically, the upper support ring 24 is provided with an upper compression sleeve fixing block 241, and the adjusting screw 21 is pressed on the upper compression sleeve fixing block 241. The upper end of the upper compression sleeve fixing block 241 extends into the upper support ring 24 and is provided with a first fixing groove 2411. The end of the adjusting screw 21 penetrates into the first fixing groove 2411. The upper compression sleeve 22 is provided with a first groove 223 corresponding to the upper compression sleeve fixing block 241, and the upper compression sleeve fixing block 241 is clamped in the first groove 223.

[0039] The lower support ring 25 is provided with a slip fixing block 251, and the slip 23 is provided with a second groove 232 corresponding to the slip fixing block 251. The slip fixing block 251 is clamped in the second groove 232, and the slip 23 and the slip fixing block 251 slide relative to each other along the radial direction of the placement hole 11.

[0040] Specifically, the lower end of the upper compression sleeve fixing block 241 and the slip fixing block 251 are respectively configured as an inverted T-shaped block and a T-shaped block along the outer circumference of the upper support ring 24. Correspondingly, the first groove 223 and the second groove 232 are also configured as an inverted T-shaped slot and a T-shaped slot. The upper compression sleeve fixing block 241 and the slip fixing block 251 cooperate to limit the position of the slips 23 and the upper compression sleeve 22 along the central axis of the placement hole 11 without affecting the radial movement of the slips 23 along the placement hole 11.

[0041] Please refer to Figure 3 and Figure 4 Because ocean currents or other factors can impact the slips 23 and upper compression sleeve 22, causing them to easily wobble during installation, plastic screws 222 are installed between the upper compression sleeve 22 and the slips 23. These screws connect the slips 23 and upper compression sleeve 22 into a single unit. Because the plastic screws 222 are made of brittle material, they can be severed by the relative sliding movement between the upper compression sleeve 22 and the slips 23. Therefore, the plastic screws 222 do not affect the clamping process of the pipe 200. The plastic screws 222, the slip fixing blocks 251, and the upper compression sleeve fixing blocks 241 work together to enhance the stability and reliability of the upper compression sleeve 22 and slips 23 before they are clamped to the pipe 200. Furthermore, the plastic screws 222 can be used to position the slips 23 relative to the upper compression sleeve 22, preventing the risk of the pipe 200 being unable to be inserted due to the slips 23 being improperly installed, resulting in the diameter of the space reserved for the placement hole 11 being smaller than the outer diameter of the pipe 200. When the pipe 200 is clamped, the plastic screw 222 can be cut off by the sliding of the upper pressing sleeve 22 relative to the slip 23, which will not affect the clamping process of the pipe 200.

[0042] Please refer to Figure 2 and Figure 3There are multiple studs 51. The adjusting screws 21 and the studs 51 are distributed along the circumference of the end surface of the flange 50, and the adjusting screws 21 and the studs 51 are staggered. The flange 50 is provided with a mounting hole 52 for threaded connection of the corresponding adjusting screw 21, and the top of the mounting hole 52 is countersunk. During assembly, the adjusting screw 21 is rotated so that the adjusting screw 21 moves along the mounting hole 52 toward the upper compression sleeve 22 until the upper compression sleeve 22 pushes the slips 23 to hold the pipe 200 tightly. After the adjusting screw 21 controls the corresponding slips 23 to hold the pipe 200 tightly, the mounting hole 52 is sealed by inserting the plug 60 into the countersunk hole at the end of the mounting hole 52.

[0043] Please refer to Figure 3 and Figure 4 Specifically, a first support ring 27 is provided between the lower support ring 25 and the sealing assembly. This first support ring 27 cushions the sealing assembly during the sealing process of the pipeline 200, reducing the mechanical impact and vibration of the sealing assembly caused by the pressure transmitted from the lower support ring 25, thereby increasing the service life of the sealing assembly. Furthermore, the provision of the first support ring 27 increases the rigidity of the entire split-type submarine pipeline connector, improving its structural stability and enabling it to further withstand the external pressure and mechanical loads of the submarine environment.

[0044] When connecting pipe 200, the pipe to be repaired is inserted through the inner hole of flange 50 into the receiving hole 11 of mechanical flange 10. The flange 50 is then pressed downward by tightening the compression nut 53. Pressure is transmitted sequentially along the upper support ring 24, ribs 26, lower support ring 25, and first support ring 27 to the sealing assembly, causing the sealing assembly to tighten and seal pipe 200. The upper compression sleeve 22 is then moved along the central axis of receiving hole 11 of mechanical flange 10 by rotating the adjustment screw 21. After the plastic screw 222 is cut, the slips 23 are pushed radially along receiving hole 11 to secure pipe 200. The configuration of the adjustment screw 21 and support assembly 20 ensures that the sealing and securing processes of pipe 200 are independent of each other, reducing the risk of leaks after repair of pipe 200 due to the unified control of the two processes, which in turn reduces the effectiveness of the repair. Furthermore, during the sealing process of the pipe 200, the flange 50 is required to drive the support assembly 20 to slide along the outer periphery of the pipe 200, so that the sealing assembly is compressed along the central axis direction of the placement hole 11. After the pipe 200 is clamped, the pipe 200 is relatively stationary relative to the slip 23 along the central axis direction of the placement hole 11, and the slip 23 is limited on the support assembly 20 by the slip fixing block 251. Therefore, the pipe 200 sealing process needs to be completed before the pipe 200 clamping process. Compared with the equipment that performs the pipe 200 sealing and the pipe 200 clamping process at the same time, the time for the structure used for the pipe 200 clamping to contact the seawater is reduced, thereby effectively preventing the seabed medium from 、 、 Plasma produces a strong corrosive effect on the iron-based material constituting the slip 23 and the upper pressure sleeve 22, thereby preventing the medium from corroding the pipe 200 clamping parts, significantly enhancing the reliability of the pipe 200 connection, and reducing the manufacturing cost of the pipe 200 clamping part material.

[0045] Please refer to Figure 3 、 Figure 6 and Figure 10The sealing assembly includes a first sealing stop ring 41, a second sealing stop ring 42, and a primary seal 43 and a secondary seal 44 disposed between the first sealing stop ring 41 and the second sealing stop ring 42. The primary seal 43 and the secondary seal 44 each include an L-shaped sealing ring 431, an O-shaped sealing ring 432, and a first pressure ring 433 and a second pressure ring 434. The L-shaped sealing ring 431 and the O-shaped sealing ring 432 are both made of elastic rubber. The L-shaped sealing ring 431 includes an axial portion 4311 disposed along the central axis of the placement hole 11 and a radial portion 4312 disposed along the diameter direction of the placement hole 11. The second pressure ring 434 is sleeved on the axial portion 4311. The O-shaped sealing ring 432 is sleeved on the second pressure ring 434, and the O-shaped sealing ring 432 is located between the radial portion 4312 and the first pressure ring 433. The first pressure ring 433 pushes the second pressure ring 434 along the central axis direction of the placement hole 11 to tighten along the diameter direction of the placement hole 11.

[0046] Specifically, the difference between the primary seal 43 and the secondary seal 44 lies in their different sizes. The first sealing stop ring 41 is located between the first support ring 27 and the primary seal 43, while the second sealing stop ring 42 is located between the secondary seal 44 and the step 113. The inner wall of the first pressure ring 433 is an inner conical surface arranged along the central axis of the placement hole 11. The inner diameter of the end of the first pressure ring 433 closest to the flange 50 is smaller than the inner diameter of the end of the first pressure ring 433 away from the flange 50. The outer periphery of the second pressure ring 434 is an outer conical surface that matches the inner wall of the first pressure ring 433. Through the cooperation of the inner and outer conical surfaces, when the pipeline 200 is sealed, the first sealing stop ring 41 is subjected to pressure transmitted via the first support ring 27, pressing the first pressure ring 433 away from the flange 50, causing the first pressure ring 433 to squeeze the second pressure ring 434 and the O-ring 432. The second pressure ring 434 achieves sealing by squeezing the axial portion 4311 toward the center axis of the placement hole 11 through the cooperation of the inner conical surface and the outer conical surface. The O-ring 432 is deformed by the pressure along the center axis of the placement hole 11, thereby achieving sealing. The cooperation of the second pressure ring 434 and the O-ring 432 restricts the flow of fluid in the gap between the pipeline 200 and the placement hole 11 along the center axis of the placement hole 11. Compared with a single O-ring 432, the sealing area along the center axis of the placement hole 11 is increased. At the same time, since the cross-section of the O-ring 432 is circular, the O-ring 432 and the axial portion 4311 also have a certain radial restriction effect on the flow of fluid in the gap between the pipeline 200 and the placement hole 11, thereby improving the sealing effect on the pipeline 200. At the same time, through the cooperation of the inner conical surface and the outer conical surface, the second pressure ring 434 can push the axial portion 4311 to center the pipeline 200.

[0047] For details, please refer to Figure 10The second pressure ring 434 is provided with a plurality of through grooves 4341 extending through the sidewall of the second pressure ring 434. The provision of the through grooves 4341 causes the second pressure ring 434 to deform toward the central axis of the placement hole 11 when squeezed by the first pressure ring 433, thereby squeezing the axial portion 4311, causing the axial portion 4311 to deform toward the central axis of the placement hole 11 along the diameter direction of the placement hole 11, thereby restricting the flow of fluid in the gap between the pipeline 200 and the placement hole 11 along the central axis of the placement hole 11.

[0048] For details, please refer to Figure 6 and Figure 9 The first sealing limit ring 41 and the second sealing limit ring 42 have the same structure, both including an outer ring 411 and an open elastic ring 412 provided on the inner wall of the outer ring 411. The difference between the first sealing limit ring 41 and the second sealing limit ring 42 is that the first sealing limit ring 41 and the second sealing limit ring 42 are different in size. The open elastic ring 412 is made of rubber, and the inner wall of the outer ring 411 is a slope that slopes downward along the central axis of the placement hole 11. During sealing, the support assembly 20 squeezes the open elastic ring 412 along the central axis of the placement hole 11, and the open elastic ring 412 moves downward along the inner wall of the outer ring 411 and tightens in the direction close to the central axis of the placement hole 11, so that the pipeline 200 is automatically centered.

[0049] Please refer to Figure 6 A back pressure test ring 45 is provided between the main seal 43 and the secondary seal 44, a first test hole 13 is provided on the mechanical flange 10, and the back pressure test ring 45 is provided with a second test hole 451 corresponding to and connected to the first test hole 13, and the first test hole 13 is blocked by a plug 60.

[0050] For details, please refer to Figure 1 The outer periphery of the mechanical flange 10 is connected with a plurality of lifting rings 12. The setting of the lifting rings 12 can facilitate the maintenance vessel to lift the entire split-type submarine pipeline connector through the lifting rings 12 during installation.

[0051] During assembly, first assemble the support assembly 20 and the upper pressure sleeve 22, slip 23, plastic screw 222, adjustment screw 21, and flange 50 in the order shown in the figure, and then assemble the mechanical flange 10 and the sealing assembly in the position shown in the figure. When repairing and connecting the pipeline 200, first cut the leaking part of the pipeline 200 into two sections to separate it into two sections of pipeline 200, and then polish the installation position of the pipeline 200. Then use the maintenance ship to lift the lifting rings 12 of the two split-type submarine pipeline connectors respectively, and slowly put the broken part of the pipeline 200 into the corresponding split-type submarine pipeline connector. Finally, connect the two split-type submarine pipeline connectors through the flange, and finally realize the rapid repair connection of the pipeline 200.

[0052] When connecting the pipeline 200 to the split-flap submarine pipeline connector, first insert the pipeline 200 to be repaired into the placement hole 11 of the mechanical flange 10 along the inner hole of the flange 50. Then, by tightening the compression nut 53, the flange 50 is pressed downward. The pressure is transmitted to the sealing assembly along the upper support ring 24, the rib 26, the lower support ring 25, and the first support ring 27, causing the sealing assembly to be compressed and seal the pipeline 200. Then, by turning the adjustment screw 21, the upper compression sleeve 22 is moved along the central axis of the placement hole 11 of the mechanical flange 10. After cutting the plastic screw 222, the slip 23 is pushed along the radial direction of the placement hole 11 to tightly hold the pipeline 200. Finally, the welded pipeline flange 30 is connected to the mechanical flange 10 body using the nut, stud 51, and flange gasket, and then a back pressure test is performed. If the test passes, the first test hole 13 is sealed with a plug 60.

Claims

1. A split-flap submarine pipeline connector, comprising a mechanical flange (10) and a pipeline flange (30), wherein the mechanical flange (10) and the pipeline flange (30) are connected, and the mechanical flange (10) is provided with a placement hole (11) for placing a pipeline (200), characterized in that: A sealing component is provided in the placement hole (11), and the sealing component is used to seal the gap between the pipeline (200) and the placement hole (11); The invention also includes a support assembly (20), wherein the support assembly (20) is inserted into the placement hole (11), and the mechanical flange (10) is connected to the flange (50) through a stud (51), and a clamping nut (53) is threadedly connected to the stud (51), and the clamping nut (53) is pressed on the flange (50), and the flange (50) is pressed on the support assembly (20), and the clamping nut (53) is used to drive the support assembly (20) to push the sealing assembly to move to the gap between the sealing pipe (200) and the placement hole (11), and the flange (50) is threadedly connected to the adjusting screw (21), and the end of the adjusting screw (21) is provided with an upper pressure sleeve ( 22), a slip (23) is provided on the inner side of the upper pressure sleeve (22), the upper pressure sleeve (22) and the slip (23) slide relative to each other, the adjusting screw (21) is used to press the upper pressure sleeve (22) to push the slip (23) to hold the pipeline (200) tightly, the sealing assembly includes a first sealing limit ring (41), a second sealing limit ring (42), and a main seal (43) and a secondary seal (44) arranged between the first sealing limit ring (41) and the second sealing limit ring (42), the first sealing limit ring (41) transmits pressure to the main seal (43) and the secondary seal (44) and cooperates with the second sealing limit ring (42) to make the main seal (43) 3) and the secondary seal (44) are deformed, the first sealing limit ring (41) and the second sealing limit ring (42) both include an outer ring (411) and an open elastic ring (412) arranged on the inner wall of the outer ring (411), the inner wall of the outer ring (411) is a slope that is downsloping along the central axis direction of the placement hole (11), the support assembly (20) transmits pressure to the open elastic ring (412) and causes the open elastic ring (412) to move down along the inner wall of the outer ring (411) to tighten in a direction close to the central axis of the placement hole (11), and the main seal (43) and the secondary seal (44) both include an L-shaped sealing ring (431) and an O-shaped sealing ring (432) , and a first pressure ring (433) and a second pressure ring (434), the L-shaped sealing ring (431) includes an axial portion (4311) arranged along the central axis of the placement hole (11) and a radial portion (4312) arranged along the diameter direction of the placement hole (11), the second pressure ring (434) is sleeved on the axial portion (4311), the O-shaped sealing ring (432) is sleeved on the second pressure ring (434), and the O-shaped sealing ring (432) is located between the radial portion (4312) and the first pressure ring (433), the first pressure ring (433) pushes the second pressure ring (434) along the central axis direction of the placement hole (11) to tighten along the diameter direction of the placement hole (11).

2. The split-type submarine pipeline connector according to claim 1, characterized in that: The cava (23) is closer to the central axis of the placement hole (11) than the upper pressure sleeve (22), and a first inclined surface (221) is provided on the side of the upper pressure sleeve (22) closer to the central axis of the placement hole (11). A second inclined surface (231) is provided on the side of the cava (23) away from the central axis of the placement hole (11). The end of the first inclined surface (221) closer to the adjusting screw (21) is closer to the central axis of the placement hole (11) than the end of the first inclined surface (221) away from the adjusting screw (21), and the second inclined surface (231) is adapted to the first inclined surface (221).

3. The split-flap submarine pipeline connector according to claim 2, characterized in that: A plastic screw (222) is provided between the upper pressing sleeve (22) and the slip (23), and the upper pressing sleeve (22) and the slip (23) are connected via the plastic screw (222).

4. The split-type submarine pipeline connector according to claim 3, characterized in that: There are multiple upper pressure sleeves (22) and slips (23), and the upper pressure sleeves (22) and slips (23) correspond to each other one by one. The support assembly (20) includes an upper support ring (24) and a lower support ring (25), and a plurality of ribs (26) arranged between the upper support ring (24) and the lower support ring (25). The ribs (26) are arranged at intervals, and the corresponding upper pressure sleeves (22) and slips (23) are located in the intervals between adjacent ribs (26).

5. The split-type submarine pipeline connector according to claim 4, characterized in that: The upper support ring (24) is provided with an upper pressure sleeve fixing block (241), the adjusting screw (21) is pressed on the upper pressure sleeve fixing block (241), the upper pressure sleeve (22) is provided with a first groove (223) corresponding to the upper pressure sleeve fixing block (241), and the upper pressure sleeve fixing block (241) is clamped in the first groove (223).

6. The split-type submarine pipeline connector according to claim 5, characterized in that: The lower support ring (25) is provided with a slip fixing block (251), the slip (23) is provided with a second groove (232) corresponding to the slip fixing block (251), the slip fixing block (251) is clamped in the second groove (232), and the slip (23) and the slip fixing block (251) slide relatively along the radial direction of the placement hole (11).

7. The split-type submarine pipeline connector according to claim 6, characterized in that: The inner wall of the first pressure ring (433) is an inner conical surface arranged along the central axis direction of the placement hole (11); the inner diameter of the end of the first pressure ring (433) close to the flange (50) is smaller than the inner diameter of the end of the first pressure ring (433) away from the flange (50); and the outer periphery of the second pressure ring (434) is an outer conical surface adapted to the inner wall of the first pressure ring (433).

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