A flushing device for a pile-driving pipeline of an offshore platform and a flushing method thereof

Abstract

The utility model provides a kind of flushing device of offshore platform pile driving pipeline, the flushing device of offshore platform pile driving pipeline includes pile shoe, pile leg, a transverse pipeline, two transverse pipelines, a pile driving pipeline, two pile driving pipelines, a water inlet pipe, two water inlet pipes and three-phase asynchronous motor;The pile leg is arranged on working platform, the bottom of pile leg is connected with the top of pile shoe, the inside of pile shoe is sequentially provided with a transverse pipeline, two transverse pipelines, the top of a transverse pipeline is communicated with the bottom of a pile driving pipeline, the top of two transverse pipelines is communicated with the bottom of two pile driving pipelines, the side of a pile driving pipeline is communicated with one end of a water inlet pipe, the side of two pile driving pipelines is communicated with one end of two water inlet pipes, the side of pile leg is provided with high-pressure hose;The output end of three-phase asynchronous motor is connected with plunger pump.The design solves the problem of pile driving pipeline blockage, and the silt in a pile driving pipeline and two pile driving pipelines will gradually flow out from the inlet of a pile driving pipeline and two pile driving pipelines with water.

Description

TECHNICAL FIELD

[0001] The present application relates to an improvement of a pile washing pipeline flushing technology, belonging to the field of offshore engineering, in particular to a pile washing pipeline flushing device and method for an offshore platform. BACKGROUND

[0002] After reaching the working area, the jack-up offshore platform first lowers the legs to the seabed, uses the seabed to provide support force for the legs, and lifts the platform off the water surface. Due to the complex seabed geology, and in order to ensure the safety of the platform after being lifted off the water surface, the platform will be pressed before standing, so that the seabed can bear greater support force.

[0003] During the process of standing and pressing, the shoe at the bottom of the leg will be completely immersed in the seabed silt. In order to reduce the adsorption force between the lower surface of the shoe and the seabed when the leg is pulled out, and to remove the silt on the upper surface of the shoe, the leg is generally equipped with a pile washing pump and two pile washing pipes. The pile washing pipes penetrate through the entire leg, and the water inlets are arranged every 3-5 meters at the leg. During the process of the shoe contacting the seabed and gradually immersing, the pressure at the bottom of the shoe gradually increases, and the silt will flow out of the water outlet of the pile washing pipe to the place with smaller pressure. After the platform stands for a long time, the water outlet of the pile washing pipe is easily blocked. During the pile washing operation of the platform, the outlet pressure of the pile washing pump directly reaches the peak value, the water in the pile washing pipe cannot flow out smoothly from the shoe, which affects the pile pulling operation of the platform, and even brings risks to the safety of the platform and personnel.

[0004] The Chinese patent application with application number CN201710641480.3 and application date July 31, 2017 discloses a multi-degree-of-freedom offshore oil platform cleaning equipment, which comprises a front leg suction device, a front leg lower arm, a first gear ring rotation limiting mechanism, a front leg upper arm, a front leg upper connecting frame, a spray gun holding mechanism, a cleaning spray gun, a cross beam, a rear leg suction device, a rear leg lower arm, a second gear ring rotation limiting mechanism, a rear leg upper arm, and a rear leg upper connecting frame. The offshore oil platform cleaning equipment has simple structure, powerful function, excellent equipment performance, safe and reliable use, high applicability, and can be widely applied to the field of offshore oil platform cleaning, thereby improving cleaning efficiency and reducing labor cost. However, the comparative document still does not solve the problem of pile washing pipeline blockage.

[0005] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the general background of the present patent application and should not be taken as admission that this information constitutes prior art with respect to any patentable claim derived from the present application. SUMMARY

[0006] The purpose of the present application is to overcome the problem of pile washing pipeline blockage in the prior art, and to provide a pile washing pipeline flushing device and method for an offshore platform to solve the problem of pile washing pipeline blockage.

[0007] To achieve the above object, the technical solution of the present application is: a flushing device for a pile driving pipeline of a marine platform, comprising a pile shoe, a pile leg, a first transverse pipeline, a second transverse pipeline, a first pile driving pipeline, a second pile driving pipeline, a first water inlet pipeline, a second water inlet pipeline, and a three-phase asynchronous motor.

[0008] The pile leg is arranged on a working platform, the bottom of the pile leg is connected to the top of the pile shoe, the inside of the pile shoe is sequentially provided with the first transverse pipeline and the second transverse pipeline, the top of the first transverse pipeline is in communication with the bottom of the first pile driving pipeline, the top of the second transverse pipeline is in communication with the bottom of the second pile driving pipeline, the side of the first pile driving pipeline is in communication with one end of the first water inlet pipeline, the side of the second pile driving pipeline is in communication with one end of the second water inlet pipeline, and the side of the pile leg is provided with a high-pressure hose.

[0009] The output end of the three-phase asynchronous motor is connected to a plunger pump, the water inlet end of the plunger pump is in communication with a water source, the water outlet end of the plunger pump is connected to one end of a high-pressure air compressor through a connecting pipe, and the other end of the high-pressure air compressor is connected to the first water inlet pipeline and the second water inlet pipeline through the high-pressure hose.

[0010] Both ends of the first transverse pipeline and the second transverse pipeline penetrate the pile shoe and are in communication with the water source.

[0011] The bottom of the pile shoe is provided with a clamping seat, and the clamping seat is arranged at the central part of the bottom of the pile shoe.

[0012] The first transverse pipeline is located below the second transverse pipeline, and the length of the first transverse pipeline is less than the length of the second transverse pipeline.

[0013] The first water inlet pipeline comprises a first water inlet branch pipeline, a second water inlet branch pipeline, a third water inlet branch pipeline, a fourth water inlet branch pipeline, a fifth water inlet branch pipeline, and a sixth water inlet branch pipeline, which are sequentially and equally spaced from the first pile driving pipeline from top to bottom.

[0014] The second water inlet pipeline comprises a first branch pipeline, a second branch pipeline, a third branch pipeline, a fourth branch pipeline, a fifth branch pipeline, and a sixth branch pipeline, which are sequentially and equally spaced from the second pile driving pipeline from top to bottom.

[0015] The connecting pipe is provided with a flow meter.

[0016] The three-phase asynchronous motor is provided with a starter, which is used for starting and stopping control and protection of the three-phase asynchronous motor.

[0017] The high-pressure hose, the first pile driving pipeline, the second pile driving pipeline, the first water inlet pipeline, and the second water inlet pipeline are all selected to be rubber hydraulic hoses.

[0018] A kind of flushing method of the flushing device of the pile driving pipeline of offshore platform, the flushing method of the pile driving pipeline of offshore platform of the flushing device of the pile driving pipeline of offshore platform includes the following steps:

[0019] Step one, when normal pile driving, one water inlet pipe, two water inlet pipes are directly connected with plunger pump, plunger pump extracts water source, water source flows through one water inlet pipe, one pile driving pipeline, one transverse pipeline and / or two water inlet pipes, two pile driving pipelines, two transverse pipelines in sequence to drive pile, when the pile leg of one pile driving pipeline, two pile driving pipelines is blocked, stop pile driving operation, remove high-pressure hose from the pile leg;

[0020] Step two, one water inlet pipe, two water inlet pipes are connected to the water source of platform through one end of high-pressure hose, then the other end of high-pressure hose is lowered along the inner cavity of one pile driving pipeline, two pile driving pipelines to the blocked place, then start three-phase asynchronous motor, and water is pumped into one transverse pipeline, two transverse pipelines by plunger pump until the water volume reaches the preset value and then stops;

[0021] Step three, start high-pressure air compressor, and the silt at the blocked place of one pile driving pipeline, two pile driving pipelines is cleaned by high-pressure air and water, after the high-pressure air compressor is started, then start three-phase asynchronous motor, continue to inject water into one pile driving pipeline, two pile driving pipelines, and finally, after the water with silt completely flows out from one pile driving pipeline, two pile driving pipelines, the high-pressure air compressor and three-phase asynchronous motor are turned off, that is, the flushing is completed.

[0022] The last water with silt completely flows out from the pile driving pipeline in step three means that under the interaction of high-pressure air and water, the silt in one pile driving pipeline, two pile driving pipelines will gradually flow out from the inlet of one pile driving pipeline, two pile driving pipelines with water, until the water flowing out becomes clear, indicating that the pipeline is clean.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] 1、In the flushing device and flushing method of the pile driving pipeline of offshore platform, the output end of the three-phase asynchronous motor is connected with the plunger pump, the water inlet end of the plunger pump is communicated with the water source, the water outlet end of the plunger pump is connected with one end of the high-pressure air compressor through the connecting pipe, the other end of the high-pressure air compressor is connected with one water inlet pipe and two water inlet pipes through the high-pressure hose, and the silt at the blocked place of one pile driving pipeline and two pile driving pipelines is cleaned by high-pressure air and water, under the interaction of high-pressure air and water, the silt in one pile driving pipeline and two pile driving pipelines will gradually flow out from the inlet of one pile driving pipeline and two pile driving pipelines with water, solving the problem of pile driving pipeline blockage. Therefore, the design is convenient to clean and easy to operate.

[0025] 2、The flushing device and method of the pile flushing pipeline of the offshore platform of the application, wherein the first water inlet branch pipe, the second water inlet branch pipe, the third water inlet branch pipe, the fourth water inlet branch pipe, the fifth water inlet branch pipe and the sixth water inlet branch pipe are communicated with the pile flushing pipeline at equal distances from top to bottom, and the first branch pipe, the second branch pipe, the third branch pipe, the fourth branch pipe, the fifth branch pipe and the sixth branch pipe are communicated with the second pile flushing pipeline at equal distances from top to bottom, all the branch pipes are independently installed and can be used immediately, the use of the branch pipes is determined according to the position of the blockage, and the branch pipe at the position closest to the blockage point is used, and the other branch pipes are blocked, so that the installation is more flexible. Therefore, the design is flexible and convenient to operate.

[0026] 3、The flushing device and method of the pile flushing pipeline of the offshore platform of the application, wherein after being flushed, the high-pressure hose is reconnected, the plunger pump is continuously started, the impact force of the plunger pump is used to reduce the adsorption force between the pile leg and the seabed, and it is ensured that the pile leg can be smoothly pulled out of the seabed. Therefore, the design is convenient for pulling out the pile leg and simple in process. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the application.

[0028] Figure 2 is a structural schematic diagram of the pile leg in the application.

[0029] Figure 3 is a working schematic diagram of the plunger pump in the application.

[0030] Figure 4 is a flow direction schematic diagram of the water source when the pile is normally flushed.

[0031] Figure 5 is a flow direction schematic diagram of the water source when the pile is blocked.

[0032] In the figure: the shoe 1, the pile leg 3, the first horizontal pipeline 4, the second horizontal pipeline 5, the first pile flushing pipeline 6, the first water inlet pipe 61, the first water inlet branch pipe 611, the second water inlet branch pipe 612, the third water inlet branch pipe 613, the fourth water inlet branch pipe 614, the fifth water inlet branch pipe 615, the sixth water inlet branch pipe 616, the second pile flushing pipeline 7, the second water inlet pipe 71, the first branch pipe 711, the second branch pipe 712, the third branch pipe 713, the fourth branch pipe 714, the fifth branch pipe 715, the sixth branch pipe 716, the working platform 8, the starter 9, the water source 10, the three-phase asynchronous motor 11, the plunger pump 12, the high-pressure air compressor 13, the flow meter 14, the connecting pipe 15, the high-pressure hose 16. DETAILED DESCRIPTION

[0033] The application will be further described in detail in combination with the description of the drawings and the specific embodiments.

[0034] Reference Figures 1 to 5The utility model provides a kind of flushing device of offshore platform pile driving pipeline, the flushing device of offshore platform pile driving pipeline includes pile shoe 1, pile leg 3, a transverse pipeline 4, two transverse pipelines 5, a pile driving pipeline 6, two pile driving pipelines 7, a water inlet pipe 61, two water inlet pipes 71 and three-phase asynchronous motor 11;

[0035] The pile leg 3 is arranged on the working platform 8, and the bottom of the pile leg 3 is connected with the top of the pile shoe 1. The inside of the pile shoe 1 is sequentially provided with a transverse pipeline 4 and two transverse pipelines 5. The top of the transverse pipeline 4 is communicated with the bottom of a pile driving pipeline 6, and the top of the two transverse pipelines 5 is communicated with the bottom of two pile driving pipelines 7. The side of the pile driving pipeline 6 is communicated with one end of a water inlet pipe 61, and the side of the two pile driving pipelines 7 is communicated with one end of two water inlet pipes 71. The side of the pile leg 3 is provided with a high-pressure hose 16.

[0036] The output end of the three-phase asynchronous motor 11 is connected with a plunger pump 12. The water inlet end of the plunger pump 12 is communicated with a water source 10. The water outlet end of the plunger pump 12 is connected with one end of a high-pressure air compressor 13 through a connecting pipe 15. The other end of the high-pressure air compressor 13 is connected with the water inlet pipe 61 and the two water inlet pipes 71 through the high-pressure hose 16.

[0037] Both ends of the transverse pipeline 4 and the two transverse pipelines 5 penetrate through the pile shoe 1 and are communicated with the water source 10.

[0038] The bottom of the pile shoe 1 is provided with a clamping seat 2, and the clamping seat 2 is arranged at the central part of the bottom of the pile shoe 1.

[0039] The transverse pipeline 4 is located below the two transverse pipelines 5, and the length of the transverse pipeline 4 is less than the length of the two transverse pipelines 5.

[0040] The water inlet pipe 61 includes a water inlet branch pipe 611, a water inlet branch pipe 612, a water inlet branch pipe 613, a water inlet branch pipe 614, a water inlet branch pipe 615 and a water inlet branch pipe 616. The water inlet branch pipe 611, the water inlet branch pipe 612, the water inlet branch pipe 613, the water inlet branch pipe 614, the water inlet branch pipe 615 and the water inlet branch pipe 616 are sequentially and equidistantly communicated with the pile driving pipeline 6 from top to bottom.

[0041] The two water inlet pipes 71 include a branch pipe 711, a branch pipe 712, a branch pipe 713, a branch pipe 714, a branch pipe 715 and a branch pipe 716. The branch pipe 711, the branch pipe 712, the branch pipe 713, the branch pipe 714, the branch pipe 715 and the branch pipe 716 are sequentially and equidistantly communicated with the two pile driving pipelines 7 from top to bottom.

[0042] The connecting pipe 15 is provided with a flow meter 14.

[0043] The three-phase asynchronous motor 11 is provided with a starter 9, which is used for controlling the start-stop control and protection of the three-phase asynchronous motor 11.

[0044] The high-pressure hose 16, the first pile driving pipeline 6, the second pile driving pipeline 7, the first water inlet pipe 61 and the second water inlet pipe 71 are all selected from rubber hydraulic hoses.

[0045] A flushing method of a pile driving pipeline flushing device of a sea platform, the flushing method of the pile driving pipeline flushing device of the sea platform comprises the following steps:

[0046] Step one, when normally driving piles, the first water inlet pipe 61 and the second water inlet pipe 71 are directly connected to the plunger pump 12, the plunger pump 12 draws water from the water source 10, and the water source 10 flows through the first water inlet pipe 61, the first pile driving pipeline 6, the first transverse pipeline 4 and / or the second water inlet pipe 71, the second pile driving pipeline 7 and the second transverse pipeline 5 in sequence to drive piles, when the first pile driving pipeline 6 and the second pile driving pipeline 7 of the pile leg 3 are blocked, stop the pile driving operation, and the high-pressure hose 16 is detached from the pile leg 3;

[0047] Step two, the first water inlet pipe 61 and the second water inlet pipe 71 are connected to the water source 10 of the platform through one end of the high-pressure hose 16, and then the other end of the high-pressure hose 16 is lowered along the inner cavity of the first pile driving pipeline 6 and the second pile driving pipeline 7 to the blocked position, and then the three-phase asynchronous motor 11 is started, the plunger pump 12 is used to inject water into the first transverse pipeline 4 and the second transverse pipeline 5, and the water injection is stopped when the water volume reaches a preset value;

[0048] Step three, the high-pressure air compressor 13 is started, the silt at the blocked position of the first pile driving pipeline 6 and the second pile driving pipeline 7 is cleaned by high-pressure air and water, after the high-pressure air compressor 13 is started, the three-phase asynchronous motor 11 is started, water continues to be injected into the first pile driving pipeline 6 and the second pile driving pipeline 7, and finally when the water containing silt completely flows out of the first pile driving pipeline 6 and the second pile driving pipeline 7, the high-pressure air compressor 13 and the three-phase asynchronous motor 11 are turned off, and the flushing is completed.

[0049] The last step in step three is that under the interaction of high-pressure air and water, the silt in the first pile driving pipeline 6 and the second pile driving pipeline 7 will gradually flow out of the inlet of the first pile driving pipeline 6 and the second pile driving pipeline 7 with the water, until the water flowing out is clear, indicating that the pipeline is clean.

[0050] The principle of the present application is as follows: after the flushing is completed, the high-pressure hose 16 is reconnected, the plunger pump 12 is continuously turned on for pile flushing, it is ensured that the pile leg 3 can be smoothly pulled out of the seabed, the starter 9 can control the start-stop control and protection of the three-phase asynchronous motor 11, and the plunger pump 12 can change the direction of water flow by using the start-stop control and protection of the three-phase asynchronous motor 11, the high-pressure air compressor 13 adjusts the pressure according to the actual use requirement, and the rubber hydraulic hose facilitates the pipe body to walk in the pile flushing pipeline and be close to the blockage of the pile flushing pipeline.

[0051] Embodiment 1

[0052] A pile flushing device for a pile flushing pipeline of a marine platform, the pile flushing device for the pile flushing pipeline of the marine platform comprising a shoe 1, a pile leg 3, a first transverse pipeline 4, a second transverse pipeline 5, a first pile flushing pipeline 6, a second pile flushing pipeline 7, a first water inlet pipe 61, a second water inlet pipe 71, and a three-phase asynchronous motor 11; the pile leg 3 is arranged on a working platform 8, the bottom of the pile leg 3 is connected with the top of the shoe 1, the inside of the shoe 1 is sequentially provided with the first transverse pipeline 4 and the second transverse pipeline 5, the top of the first transverse pipeline 4 is communicated with the bottom of the first pile flushing pipeline 6, the top of the second transverse pipeline 5 is communicated with the bottom of the second pile flushing pipeline 7, the side of the first pile flushing pipeline 6 is communicated with one end of the first water inlet pipe 61, the side of the second pile flushing pipeline 7 is communicated with one end of the second water inlet pipe 71, and the side of the pile leg 3 is provided with a high-pressure hose 16; the output end of the three-phase asynchronous motor 11 is connected with a plunger pump 12, the water inlet end of the plunger pump 12 is communicated with a water source 10, the water outlet end of the plunger pump 12 is connected with one end of a high-pressure air compressor 13 through a connecting pipe 15, and the other end of the high-pressure air compressor 13 is connected with the first water inlet pipe 61 and the second water inlet pipe 71 through the high-pressure hose 16; the two ends of the first transverse pipeline 4 and the second transverse pipeline 5 are both penetrated through the shoe 1 and communicated with the water source 10.

[0053] A pile flushing method of a pile flushing device for a pile flushing pipeline of a marine platform, the pile flushing method of the pile flushing device for the pile flushing pipeline of the marine platform comprising the following steps:

[0054] Step one, when normally flushing, the first water inlet pipe 61 and the second water inlet pipe 71 are directly connected with the plunger pump 12, the plunger pump 12 draws the water source 10, the water source 10 flows through the first water inlet pipe 61, the first pile flushing pipeline 6, the first transverse pipeline 4, and / or the second water inlet pipe 71, the second pile flushing pipeline 7, and the second transverse pipeline 5 in sequence for pile flushing, when the first pile flushing pipeline 6 and the second pile flushing pipeline 7 of the pile leg 3 are blocked, the pile flushing operation is stopped, and the high-pressure hose 16 is detached from the pile leg 3;

[0055] Step two, the water pipe 61, two water pipe 71 through the high pressure hose 16 one end is connected to the water source 10 in the platform, then the high pressure hose 16 the other end along a pile pipe 6, two pile pipe 7 cavity down to the jammed place, immediately start three-phase asynchronous motor 11, using the plunger pump 12 to water to a horizontal pipe 4, two horizontal pipe 5, until the water reaches the preset value after stop;

[0056] Step three, start high pressure air compressor 13, through the high pressure air and water to clean a pile pipe 6, two pile pipe 7 jammed place of silt, after the high pressure air compressor 13 is opened, then start three-phase asynchronous motor 11, continue to water to a pile pipe 6, two pile pipe 7, finally, after the water with silt from a pile pipe 6, two pile pipe 7 completely out, close the high pressure air compressor 13 and three-phase asynchronous motor 11, that is, flush out.

[0057] Example 2:

[0058] Example 2 and example 1 are basically the same, the difference is:

[0059] A kind of flushing device of pile pipe of offshore platform, the water pipe 61 including a water inlet branch pipe 611, two water inlet branch pipe 612, three water inlet branch pipe 613, four water inlet branch pipe 614, five water inlet branch pipe 615 and six water inlet branch pipe 616, a water inlet branch pipe 611, two water inlet branch pipe 612, three water inlet branch pipe 613, four water inlet branch pipe 614, five water inlet branch pipe 615, six water inlet branch pipe 616 are sequentially communicated with a pile pipe 6 at equal distance from top to bottom;The water pipe 71 including a branch pipe 711, two branch pipe 712, three branch pipe 713, four branch pipe 714, five branch pipe 715 and six branch pipe 716, a branch pipe 711, two branch pipe 712, three branch pipe 713, four branch pipe 714, five branch pipe 715 and six branch pipe 716 are sequentially communicated with two pile pipe 7 at equal distance from top to bottom;The connecting pipe 15 is installed with flowmeter 14, all branch pipes are independently installed, can be used immediately, the use of branch pipe is determined according to the jammed position of a pile pipe 6, two pile pipe 7, which branch pipe position is closest to the jammed point uses the corresponding position branch pipe, other branch pipe connection is blocked, installation is more flexible.

[0060] The above only for the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiment, but any equivalent modification or change according to the disclosed content of the present application by the ordinary skill in the art, should be included in the protection scope recorded in the claim book.

Claims

1. A flushing device for a drive line of a marine platform drive pile, characterised in that The flushing device of the pile driving pipeline of the offshore platform comprises a pile shoe (1), a pile leg (3), a transverse pipeline (4), a transverse pipeline (5), a pile driving pipeline (6), a pile driving pipeline (7), a water inlet pipe (61), a water inlet pipe (71) and a three-phase asynchronous motor (11). The pile leg (3) is arranged on the working platform (8), the bottom of the pile leg (3) is connected with the top of the pile shoe (1), the inside of the pile shoe (1) is sequentially provided with the transverse pipeline (4) and the transverse pipeline (5), the top of the transverse pipeline (4) is communicated with the bottom of the pile driving pipeline (6), the top of the transverse pipeline (5) is communicated with the bottom of the pile driving pipeline (7), the side of the pile driving pipeline (6) is communicated with one end of the water inlet pipe (61), the side of the pile driving pipeline (7) is communicated with one end of the water inlet pipe (71), and the side of the pile leg (3) is provided with a high-pressure hose (16). The output end of the three-phase asynchronous motor (11) is connected with a plunger pump (12), the water inlet end of the plunger pump (12) is communicated with a water source (10), the water outlet end of the plunger pump (12) is connected with one end of a high-pressure air compressor (13) through a connecting pipe (15), and the other end of the high-pressure air compressor (13) is connected with the water inlet pipe (61) and the water inlet pipe (71) through the high-pressure hose (16). Both ends of the transverse pipeline (4) and the transverse pipeline (5) penetrate through the pile shoe (1) and are communicated with the water source (10).

2. A flushing device for a pile driving line of an offshore platform according to claim 1, characterized in that: The bottom of the pile shoe (1) is provided with a clamping seat (2), and the clamping seat (2) is arranged at the central position of the bottom of the pile shoe (1).

3. A flushing device for a pile driving line of an offshore platform according to claim 2, characterized in that: The transverse pipeline (4) is located below the transverse pipeline (5), and the length of the transverse pipeline (4) is less than that of the transverse pipeline (5).

4. A flushing device for a pile driving line of an offshore platform according to claim 1, characterized in that: The water inlet pipe (61) comprises a water inlet branch pipe (611), a water inlet branch pipe (612), a water inlet branch pipe (613), a water inlet branch pipe (614), a water inlet branch pipe (615) and a water inlet branch pipe (616), and the water inlet branch pipe (611), the water inlet branch pipe (612), the water inlet branch pipe (613), the water inlet branch pipe (614), the water inlet branch pipe (615) and the water inlet branch pipe (616) are sequentially and equidistantly communicated with the pile driving pipeline (6) from top to bottom.

5. A flushing device for a pile driving line of an offshore platform according to claim 1, characterized in that: The water inlet pipe (71) comprises a branch pipe (711), a branch pipe (712), a branch pipe (713), a branch pipe (714), a branch pipe (715) and a branch pipe (716), and the branch pipe (711), the branch pipe (712), the branch pipe (713), the branch pipe (714), the branch pipe (715) and the branch pipe (716) are sequentially and equidistantly communicated with the pile driving pipeline (7) from top to bottom.

6. A flushing device for a pile driving line of an offshore platform according to claim 1, characterized in that: The connecting pipe (15) is provided with a flow meter (14).

7. A flushing device for a pile driving line of an offshore platform according to claim 1, characterized in that: The three-phase asynchronous motor (11) is provided with a starter (9) for starting and stopping control and protection of the three-phase asynchronous motor (11).

8. An apparatus according to any one of claims 1 to 7, wherein: The high-pressure hose (16), the pile driving pipeline (6), the pile driving pipeline (7), the water inlet pipe (61) and the water inlet pipe (71) are all selected from rubber hydraulic hoses.

9. A method of flushing the flushing device of the offshore platform pile driving pipe according to claim 1, characterized in that The flushing method of the flushing device of the pile flushing pipeline of the offshore platform comprises the following steps: Step one, when flushing normally, connect the first water inlet pipe (61) and the second water inlet pipe (71) with the plunger pump (12) directly, the plunger pump (12) draws water from the water source (10), the water source (10) flows through the first water inlet pipe (61), the first pile flushing pipeline (6), the first horizontal pipeline (4) and / or the second water inlet pipe (71), the second pile flushing pipeline (7) and the second horizontal pipeline (5) in sequence to flush the pile, when the first pile flushing pipeline (6) and the second pile flushing pipeline (7) of the pile leg (3) are blocked, stop the pile flushing operation, and remove the high-pressure hose (16) from the pile leg (3); Step two, connect the first water inlet pipe (61) and the second water inlet pipe (71) to the water source (10) of the platform through one end of the high-pressure hose (16), then put the other end of the high-pressure hose (16) along the inner cavity of the first pile flushing pipeline (6) and the second pile flushing pipeline (7) to the blocked position, start the three-phase asynchronous motor (11) immediately, use the plunger pump (12) to inject water into the first horizontal pipeline (4) and the second horizontal pipeline (5), and stop when the water volume reaches the preset value; Step three, start the high-pressure air compressor (13), clean the silt at the blocked position of the first pile flushing pipeline (6) and the second pile flushing pipeline (7) by high-pressure air and water, then start the three-phase asynchronous motor (11) to continue to inject water into the first pile flushing pipeline (6) and the second pile flushing pipeline (7), and finally, close the high-pressure air compressor (13) and the three-phase asynchronous motor (11) when the water containing silt flows out from the first pile flushing pipeline (6) and the second pile flushing pipeline (7) completely, that is, the flushing is completed.

10. A method of flushing a flushing device of a pile driving pipe of an offshore platform according to claim 9, characterized in that: In the last step of step three, after the water containing silt flows out from the pile flushing pipeline completely, it means that under the interaction of high-pressure air and water, the silt in the first pile flushing pipeline (6) and the second pile flushing pipeline (7) will gradually flow out from the inlet of the first pile flushing pipeline (6) and the second pile flushing pipeline (7) with the water, until the flushed water becomes clear, indicating that the pipeline is clean.

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