Valve concealed sea pipe end

Abstract

The application discloses a valve hidden type sea pipe end socket and belongs to the technical field of submarine pipeline installation engineering, which comprises a main pipe, wherein the main pipe is provided with a water outlet end and a water inlet end, the water outlet end and the water inlet end are located on the same horizontal plane, the water outlet end is connected with a sea pipe, the water inlet end is fixedly connected with a sealing plate, the sealing plate is provided with a first valve pipeline and a second valve pipeline to control the opening and closing of the water inlet end, the sealing plate is fixedly connected with two symmetrical wing plates, the first valve pipeline and the second valve pipeline are located between the two wing plates, and the wing plates extend to the outside of the first valve pipeline and the second valve pipeline to form a protection cavity. The valve pipeline system of the application is hidden between the wing plates, the pipe body is not provided with obvious protruding structures, the valve pipeline system is simple to manufacture, safe and reliable, and convenient to operate, the valve pipeline system not only effectively avoids the pipe body from being hooked by an anchor cable or a fishing net, but also meets the requirements of sea pipe laying, the valve pipeline system is provided with a thread plug to avoid the situation that the sea pipe is filled with water due to the accidental failure of a ball valve.

Description

Technical Field

[0001] This invention belongs to the technical field of submarine pipeline installation engineering, and particularly relates to a valve-concealed submarine pipeline end cap. Background Technology

[0002] Currently, subsea pipeline end caps are required during the subsea pipeline laying phase. After installing subsea pipeline end caps, seawater can be prevented from entering the subsea pipeline. The subsea pipeline end caps used for the initial and final laying of the subsea pipeline are equipped with valves.

[0003] Traditionally, the starting and ending points of subsea pipeline installations involve manifolds and protective frames installed on the pipeline head. Valves are mounted on the manifolds, and the protective frames protect them. These manifolds and protective frames are relatively tall and constitute prominent structures on the pipeline head. When the pipeline head is on the seabed, these protruding structures are easily snagged by anchor cables, fishing nets, etc., from construction vessels or fishing boats operating in the surrounding waters. This can cause the pipeline to be pulled off course, or even buckle and deform. In severe cases, this can lead to water ingress into the pipeline, or damage to the manifold, resulting in water contamination.

[0004] Therefore, there is an urgent need to design a valve-concealed subsea pipeline end cap to solve the problem of subsea pipeline end caps being easily damaged, as mentioned above. Summary of the Invention

[0005] To address the technical problem mentioned in the background art, where conventional subsea pipeline end caps have protruding structures that are easily snagged by anchor cables, fishing nets, etc., leading to the subsea pipeline being pulled off course or damaged, a valve-concealed subsea pipeline end cap is provided to solve the problem of subsea pipeline end caps being easily damaged.

[0006] To achieve the above objectives, the specific technical solution of the valve-concealed subsea pipeline end cap of the present invention is as follows: A valve-concealed subsea pipeline end cap includes a main pipe with an outlet and an inlet, the outlet and inlet being located on the same horizontal plane and connected to the subsea pipeline. The inlet is fixedly connected to a sealing plate, which has a first valve pipeline and a second valve pipeline to control the opening and closing of the inlet. Two symmetrical wing plates are fixedly connected to the sealing plate, with the first valve pipeline and the second valve pipeline located between the two wing plates. The wing plates extend beyond the first and second valve pipelines to form a protective cavity. The main pipe is equipped with a partition, which is fixedly connected to the sealing plate. The partition includes a first partition and a second partition. One end of the first partition is fixedly connected to the sealing plate, and the end of the first partition away from the sealing plate is fixedly connected to the second partition. The end of the second partition away from the first partition is fixedly connected to the inner side wall of the main pipe. The second partition and the first valve pipeline are both located on one side of the first partition to divide the inside of the main pipe into a first cavity and a second cavity. The first cavity is connected to the first valve pipeline, and the second cavity is connected to the second valve pipeline. A water passage is provided on the first cavity. The inlet of the water passage is connected to the first cavity, and the outlet of the water passage is connected to the second cavity.

[0007] Furthermore, the ends of the wingplate are chamfered.

[0008] Furthermore, the sealing plate is equipped with a main board, which is located between the first valve pipeline and the second valve pipeline, so as to divide the protection cavity into the first valve pipeline protection cavity and the second valve pipeline protection cavity through the main board.

[0009] Furthermore, the valve in the first valve pipeline is equipped with a detachable first handle, and the valve in the second valve pipeline is equipped with a detachable second handle.

[0010] Furthermore, both the inlet end of the first valve pipeline and the inlet end of the second valve pipeline are equipped with plugs.

[0011] Furthermore, the main pipe is provided with a first water passage hole, which is connected to the first cavity. The main pipe is also provided with a second water passage hole, which is connected to the second cavity. The inlet of the water pipe is connected to the first water passage hole, and the outlet of the water pipe is connected to the second water passage hole.

[0012] Furthermore, a pigging ball is provided in the second cavity to separate the medium in the second cavity, and the pigging ball slides relative to the main pipe.

[0013] Furthermore, the second baffle is positioned parallel to the bottom surface of the pig near the second baffle, so that the second baffle limits the movement of the pig.

[0014] The valve-concealed subsea pipeline end cap of the present invention has the following advantages: the valve pipeline system of the present invention is concealed between the flanges, and there is no obvious protruding structure on the pipe body. It is simple to manufacture, safe and reliable, and easy to operate. It not only effectively avoids the pipe body from being hooked by anchor cables or fishing nets, but also meets the requirements of subsea pipeline laying. The valve pipeline system is equipped with a plug to avoid the situation where water enters the subsea pipeline due to accidental failure of the ball valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the valve-concealed subsea pipeline end cap structure of the present invention; Figure 2 This is a schematic diagram of the first valve pipeline of the present invention; Figure 3 This is a schematic diagram of the internal structure of the valve-concealed subsea pipeline head of the present invention; Figure 4 This is a schematic diagram of the water passage hole of the valve-concealed subsea pipeline end cap of the present invention.

[0016] The markings in the diagram are as follows: 1. Main pipe; 2. Outlet; 3. Inlet; 4. Sealing plate; 5. First valve pipeline; 6. Second valve pipeline; 7. Wing plate; 8. Main plate; 9. First handle; 10. Second handle; 11. Plug; 12. Baffle; 121. First baffle; 122. Second baffle; 13. First cavity; 14. Second cavity; 15. Pipe cleaning ball; 16. Water passage pipeline; 17. First water passage hole; 18. Second water passage hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0019] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a valve-concealed subsea pipeline end cap.

[0020] Traditionally, the subsea pipeline end cap has manifolds and protective frames installed on it. These are protruding structures on the end cap. These protruding structures are easily scratched by the anchor cables and fishing nets of construction vessels or fishing boats operating in the surrounding waters, causing the subsea pipeline to be pulled off course, which can easily lead to pipeline displacement and damage.

[0021] Therefore, this invention provides a valve-concealed subsea pipeline end cap, such as... Figure 1As shown, the system includes a main pipe 1, which has an outlet end 2 and an inlet end 3. The outlet end 2 and the inlet end 3 are located on the same horizontal plane to avoid protruding structures. The outlet end 2 is connected to the subsea pipeline to inject or drain water into the subsea pipeline system. The inlet end 3 is fixedly connected to a sealing plate 4, which has a first valve pipeline 5 and a second valve pipeline 6 to control the opening and closing of the inlet end 3. Two symmetrical wing plates 7 are fixedly connected to the sealing plate 4. The first valve pipeline 5 and the second valve pipeline 6 are located between the two wing plates 7. The wing plates 7 extend beyond the first valve pipeline 5 and the second valve pipeline 6 to form a protective cavity, so that the first valve pipeline 5 and the second valve pipeline 6 are hidden between the wing plates 7, reducing protruding structures. The main pipe 1 is provided with a partition 12, which is fixedly connected to the sealing plate 4. The partition 12 includes a first partition 121 and a second partition 122. One end of the first partition 121 is fixedly connected to the sealing plate 4, and the end of the first partition 121 away from the sealing plate 4 is fixedly connected to the second partition 122. The end of the second partition 122 away from the first partition 121 is fixedly connected to the inner side wall of the main pipe 1. The second partition 122 and the first valve pipeline 5 are both located on one side of the first partition 121 to divide the inside of the main pipe 1 into a first cavity 13 and a second cavity 14. The first cavity 13 is connected to the first valve pipeline 5, and the second cavity 14 is connected to the second valve pipeline 6. A water passage 16 is provided on the first cavity 13. The inlet of the water passage 16 is connected to the first cavity 13, and the outlet of the water passage 16 is connected to the second cavity 14.

[0022] Preferably, the axes of the first valve pipeline 5 and the second valve pipeline 6 are parallel to the axis of the main pipeline 1 to improve the efficiency of water injection or drainage in the subsea pipeline.

[0023] The chamfer at the end of the wing plate 7 reduces the protruding points of the wing plate 7 structure, preventing it from being hooked by anchor cables or fishing nets, and also makes way for the first valve pipeline 5 and the second valve pipeline 6, providing operating space for the opening and closing of the first valve pipeline 5 and the second valve pipeline 6.

[0024] The sealing plate 4 is provided with a main board 8, which is located between the first valve pipeline 5 and the second valve pipeline 6. The main board 8 divides the protective cavity into the first valve pipeline 5 protective cavity and the second valve pipeline 6 protective cavity. The first valve pipeline 5 protective cavity hides the first valve pipeline 5, and the second valve pipeline 6 protective cavity hides the second valve pipeline 6.

[0025] Preferably, the main board 8 has holes for connecting shackles, and circular ear plates are fixedly connected to the opposite sides of the holes to ensure the stability of the subsea pipeline head during hoisting. The shackles are connected to A&R cables or wire ropes for the start or end of subsea pipeline laying.

[0026] Preferably, the first valve pipeline 5 and the second valve pipeline 6 are arranged symmetrically, such as... Figure 2As shown, the valve of the first valve pipeline 5 is equipped with a detachable first handle 9, and the valve of the second valve pipeline 6 is equipped with a detachable second handle 10, in order to reduce the protruding structures on the first valve pipeline 5 and the second valve pipeline 6. The first handle 9 and the second handle 10 are removed before the device is put into the water, and they are tied to the valve pipeline with thin iron wire to prevent the valve from being accidentally opened by other objects during the subsea pipeline head immersion or on the seabed.

[0027] Preferably, ball valves are selected for the first valve pipeline 5 and the second valve pipeline 6 to ensure rapid opening and closing of the valves and the sealing of the valve pipelines.

[0028] Both the inlet end of the first valve pipeline 5 and the inlet end of the second valve pipeline 6 are equipped with plugs 11 to ensure the sealing of the subsea pipe head. The plugs 11 are positioned 1cm to 3cm beyond the edge of the wing plate 7 to ensure sufficient operating space for workers to open the plugs 11 with tools, and to avoid interference with the shackles connected to the main board 8.

[0029] The first valve pipeline 5 protection chamber and the second valve pipeline 6 protection chamber are both protective chambers with openings on both sides, such as... Figure 1 As shown, this provides operating space for staff to control the first valve pipeline 5 and the second valve pipeline 6.

[0030] like Figure 1 and Figure 3 As shown, after opening the first valve pipeline 5, seawater can flow from the first cavity 13 into the second cavity 14, and the main pipe 1 can be used for water injection or drainage through the cooperation of the first cavity 13 and the second cavity 14.

[0031] like Figure 4 As shown, the main pipe 1 has a first water passage hole 17, which is connected to the first cavity 13. The main pipe 1 also has a second water passage hole 18, which is connected to the second cavity 14. The inlet of the water passage pipe 16 is connected to the first water passage hole 17, and the outlet of the water passage pipe 16 is connected to the second water passage hole 18, so that the water passage pipe 16 is located on the outer wall of the main pipe 1.

[0032] Preferably, the main board 8 and the partition 12 can be configured as an integrated structure, with the main board 8 extending into the interior of the subsea pipe to form the partition 12, which facilitates the installation and fabrication of the device.

[0033] The second cavity 14 is provided with a pigging ball 15 to separate the medium in the second cavity 14. The pigging ball 15 can slide relative to the main pipe 1. During installation, the pigging ball 15 is located between the second partition 122 and the second water passage hole 18 so that the first cavity 13 passes over the pigging ball 15 and communicates with the second cavity 14.

[0034] Preferably, the second baffle 122 is arranged in a direction parallel to the bottom surface of the pig 15 near the second baffle 122, so that the second baffle 122 limits the pig 15. During installation, the pig 15 is directly inserted from the outlet end 2 and abuts against the second baffle 122, so that the second baffle 122 limits the pig 15 during installation.

[0035] Preferably, the outlet end 2 is fixedly connected with a flange to facilitate connection and disassembly with the subsea pipeline system. Alternatively, the outlet end 2 may be connected to the subsea pipeline system by welding without using a flange.

[0036] The method of using the valve-concealed subsea pipeline end cap of the present invention includes: When the subsea pipeline is being injected with water normally, the pipeline is under negative pressure. By unscrewing the plug 11 of the first valve and opening the first valve pipeline 5, the seawater flows through the first water passage 17, the water passage 16 and the second water passage 18, passing over the cleaning ball 15 and flowing into the second cavity 14, thus achieving the purpose of injecting water into the subsea pipeline. When the first valve pipeline 5 malfunctions or is in an inconvenient location to operate, the second valve pipeline 6 can also be opened to inject water. Since the subsea pipeline is under negative pressure, the plug 11 of the second valve is unscrewed and the second valve pipeline 6 is opened. Seawater flows into the second cavity 14, and the water pressure pushes the cleaning ball 15 to move into the subsea pipeline, thus achieving the purpose of injecting water into the subsea pipeline. When the subsea pipeline needs to be injected with water quickly, due to the negative pressure inside the pipeline, the plug 11 of the second valve is unscrewed and the second valve pipeline 6 is opened, and seawater flows into the second cavity 14. The water pressure pushes the cleaning ball 15 into the subsea pipeline. After the cleaning ball 15 passes the second water passage 18, the plug 11 of the first valve is unscrewed and the first valve pipeline 5 is opened. The seawater flow in the first valve pipeline 5 merges with the seawater flow in the second valve pipeline 6 through the first water passage 17, the water passage 16, and the second water passage 18, thereby achieving the purpose of rapid water injection. When the subsea pipeline needs to be drained, unscrew the plug 11 of the second valve and open the second valve pipeline 6 to inject high-pressure air into the second valve pipeline 6. The high-pressure air pushes the cleaning ball 15 to move continuously into the subsea pipeline to achieve the purpose of drainage.

[0037] This invention conceals the valve piping system within the flanges 7, with no obvious protruding structures on the pipe body. It is simple to manufacture, safe, reliable, and easy to operate. It effectively prevents the pipe from being snagged by anchor cables or fishing nets, and also meets the requirements of subsea pipeline laying. The valve piping system is equipped with a plug 11 to prevent water ingress into the subsea pipeline due to accidental ball valve failure. This invention's concealed valve subsea pipeline end cap can employ different water injection and drainage methods depending on the situation, meeting diverse needs during the use of the subsea pipeline end cap and improving the versatility and reliability of the device.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A valve-concealed subsea pipeline end cap, characterized in that, The system includes a main pipe with an outlet and an inlet, both located on the same horizontal plane. The outlet is connected to the subsea pipeline, and the inlet is fixedly connected to a sealing plate. The sealing plate has a first valve pipeline and a second valve pipeline to control the opening and closing of the inlet. Two symmetrical wing plates are fixedly connected to the sealing plate, with the first and second valve pipelines located between them. The wing plates extend beyond the first and second valve pipelines to form a protective cavity. The main pipe is equipped with a partition, which is fixedly connected to the sealing plate. The partition includes a first partition and a second partition. One end of the first partition is fixedly connected to the sealing plate, and the end of the first partition away from the sealing plate is fixedly connected to the second partition. The end of the second partition away from the first partition is fixedly connected to the inner side wall of the main pipe. The second partition and the first valve pipeline are both located on one side of the first partition to divide the inside of the main pipe into a first cavity and a second cavity. The first cavity is connected to the first valve pipeline, and the second cavity is connected to the second valve pipeline. A water passage is provided on the first cavity. The inlet of the water passage is connected to the first cavity, and the outlet of the water passage is connected to the second cavity.

2. The valve-concealed subsea pipeline end cap according to claim 1, characterized in that, Chamfer at the end of the wing.

3. The valve-concealed subsea pipeline end cap according to claim 2, characterized in that, The sealing plate is equipped with a main board, which is located between the first valve pipeline and the second valve pipeline, so as to divide the protection chamber into the first valve pipeline protection chamber and the second valve pipeline protection chamber through the main board.

4. The valve-concealed subsea pipeline end cap according to claim 1 or 3, characterized in that, The valve in the first valve pipeline is equipped with a detachable first handle, and the valve in the second valve pipeline is equipped with a detachable second handle.

5. The valve-concealed subsea pipeline end cap according to claim 4, characterized in that, Both the inlet end of the first valve pipeline and the inlet end of the second valve pipeline are equipped with plugs.

6. The valve-concealed subsea pipeline end cap according to claim 1, characterized in that, The main pipe has a first water passage hole that is connected to the first cavity. The main pipe also has a second water passage hole that is connected to the second cavity. The inlet of the water pipe is connected to the first water passage hole, and the outlet of the water pipe is connected to the second water passage hole.

7. The valve-concealed subsea pipeline end cap according to claim 1, characterized in that, The second chamber is equipped with a pigging ball to separate the medium inside the second chamber. The pigging ball can slide relative to the main pipe.

8. The valve-concealed subsea pipeline end cap according to claim 7, characterized in that, The second baffle is set in a direction parallel to the bottom surface of the pig near the second baffle, so that the second baffle limits the pig.

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