Marine test equipment and test method for wave and wind compensation system

Abstract

The present invention discloses an offshore test device and a test method for a wave compensation system, including a wave compensation system device (1) to be tested, a hook (2), a test counterweight (3), a scale counterweight (4), a steel wire rope (5), a first buoyancy ball (6), a small scale (7), a second buoyancy ball (8), a large scale (9), a first camera (10), a second camera (11), a third camera (12), a first pointer (13), and a second pointer (14). The offshore test device and the test method for the wave compensation system of the present invention, on the basis of ensuring the smooth progress of the test, not only have a low cost, are simple to operate, and can be reused, but also can save the rental cost, installation cost, and time cost generated by using an underwater robot.

Description

Technical Field

[0001] The present invention relates to an offshore test equipment and test method for a wave compensation system. Background Art

[0002] With the increasing exploitation of seabed resources and the deepening of operation depth, in the current configuration of offshore engineering equipment, wave compensation systems are becoming more and more popular and have become an essential tool for deep-sea engineering. As the most important function of the lifting system, wave compensation technology is mainly used in offshore platform drilling and production operations, wellhead maintenance, offshore cargo lifting and transfer, submersible recovery and lifting, seabed equipment maintenance, and offshore equipment installation, etc.

[0003] Generally, when a workboat or floating platform is carrying out offshore construction operations, the undulating changes of the sea waves will cause the ship to exhibit complex motions, such as rolling, pitching, and heaving motions in the vertical direction. These motions will affect the safe and reliable operation of the lifting system on the workboat. The wave compensation system is a system that compensates for the irregular motions of the operating equipment on the mother ship or floating platform caused by wave motions through a combination of active and passive technologies, thereby controlling the motion amplitude and period of the suspended load connected to the operating equipment underwater or above water, making the motion of the suspended load tend to be smooth or remain stationary.

[0004] In recent years, in the shipbuilding industry of our country, based on the cheap labor market and material cost market in our country, European and American companies have successively built some high-end engineering ships or platforms with wave compensation systems in some shipyards in our country. However, the final offshore commissioning of the equipment is basically completed overseas. The main reason is that when conducting the final offshore test of the system, not only is it necessary to rely on severe sea conditions, but also an underwater robot is needed to cooperate to complete it. However, in the domestic market of our country, due to the small business volume of the professional underwater robot market, it is not easy to lease one, and the lease price is very expensive. The shipowner cannot afford this cost, so they choose to complete it overseas. Summary of the Invention

[0005] The object of the present invention is to provide a test equipment and test method for a wave compensation system that does not require the cooperation of an underwater robot and can well complete the offshore testing and commissioning of various performances of the wave compensation system.

[0006] The technical solution adopted by the present invention to achieve the above object is as follows: An offshore test device for a wave compensation system, comprising a wave compensation system device (1) to be tested, a hook (2), a test counterweight (3), a scale counterweight (4), a steel wire rope (5), a first buoyancy ball (6), a small scale (7), a second buoyancy ball (8), a large scale (9), a first camera (10), a second camera (11), a third camera (12), a first pointer (13), and a second pointer (14). The scale counterweight (4), the large scale (9), and the second buoyancy ball (8) are connected into one body and sunk to the seabed. The first buoyancy ball (6) is fixed on the test counterweight (3) through the small scale (7). The second buoyancy ball (8) keeps the large scale (9) in a straightened state based on the buoyancy effect. The first pointer (13) is fixed on the hook (2). The first pointer (13), the second pointer (14), together with the hook (2) and the test counterweight (3), perform heaving motion along with the workboat. The first pointer (13) and the second pointer (14) move up and down reciprocally relative to the small scale (7) and the large scale (9). The first camera (10) is located on the first pointer (13), and the second camera (11) and the third camera (12) are located on the second pointer (14). The first camera (10), the second camera (11), and the third camera (12) perform real-time observation on the reciprocating motion of the first pointer (13) and the second pointer (14) relative to the large scale (9) and the small scale (7). The second camera (11) and the third camera (12) observe the relative displacement between the second pointer (14) and the large scale (9) and transmit it to the ship for the debugging personnel to use in a timely manner to adjust the settings of the wave compensation system device (1) to be tested.

[0007] The large scale (9) and the small scale (7) are provided with uniformly arranged scale marks.

[0008] Another technical solution adopted by the present invention to achieve the above object is as follows: A test method for a test device of a wave compensation system, the following steps

[0009] a. On the premise that there are waves on the sea surface, fix the wave compensation system device (1) to be tested on a ship or a floating platform, and lower the hook (2) with a counterweight and a test tool underwater;

[0010] b. The scale counterweight (4), large scale (9), and second buoyancy ball (8) are lowered to the seabed through the hook (2). At the same time, the test counterweight (3) is placed in the middle of the large scale (9) and cannot touch the seabed. Due to the action of waves, the hook (2), second pointer (14), and test counterweight (3) move up and down with the ship or floating platform. The second camera (11) located on the second pointer (14) will observe in real time the movement amplitude and movement period of the test counterweight (3) relative to the large scale (9), and transmit the observed information to the debugging personnel on the working ship in a timely manner, and adjust the parameters of the wave compensation system to make the test counterweight (3) hover stably at a certain height to achieve the expected goal;

[0011] c. After step b is completed, switch to the working mode of the wave compensation system on the working ship. Slowly lower the test counterweight (3) through the hook (2) until it touches the seabed. The third camera (12) records the entire landing process and whether there are any lifting and lowering changes in a timely manner, and transmits the information to the debugging personnel on the ship in real time, and adjusts the wave compensation system until there is no more lifting and lowering movement when the test counterweight (3) lands to achieve the expected goal;

[0012] d. After completing steps b and c, switch the working mode of the wave compensation system again on the working ship, continue to lower the height of the hook (2) so that the steel wire rope (5) is in a slack state, and the hook (2) cannot collide with the test counterweight (3). The hook (2) carrying the first pointer (13) will move up and down reciprocally. Observe this movement through the first camera (10) and feedback it to the debugging personnel on the ship in real time, and adjust the system to make the hook (2) stay stably below the water surface to meet the expected requirements.

[0013] The offshore test equipment and test method for a wave compensation system of the present invention not only have a low cost, are simple to operate, reusable, but also can save the rental cost, installation cost, and time cost generated by using an underwater robot on the basis of ensuring the smooth progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the test equipment for the offshore test equipment and test method of a wave compensation system of the present invention.

[0015] Figure 2 is an operation schematic diagram of step b of the offshore test method for a wave compensation system of the present invention.

[0016] Figure 3 is an operation schematic diagram of step c of the offshore test method for a wave compensation system of the present invention.

[0017] Figure 4It is a schematic diagram of the operation of step d in the offshore test method of a wave compensation system of the present invention.

[0018] Figure 5 It is a schematic diagram of the scale structure of the test equipment in the offshore test equipment and test method of a wave compensation system of the present invention.

[0019] Figure 6 It is a schematic diagram of the pointer structure of the test equipment in the offshore test equipment and test method of a wave compensation system of the present invention. Detailed implementation manners

[0020] As Figure 1 shown, an offshore test equipment for a wave compensation system includes a wave compensation system equipment 1 to be tested, a lifting hook 2, a test counterweight 3, a scale counterweight 4, a steel wire rope 5, a first buoyancy ball 6, a small scale 7, a second buoyancy ball 8, a large scale 9, a first camera 10, a second camera 11, a third camera 12, a first pointer 13, and a second pointer 14. The scale counterweight 4, the large scale 9, and the second buoyancy ball 8 are connected together and sunk to the seabed. The first buoyancy ball 6 is fixed on the test counterweight 3 through the small scale 7. The second buoyancy ball 8 keeps the large scale 9 in a straightened state based on the buoyancy effect. The first pointer 13 is fixed on the lifting hook (2). The first pointer 13, the second pointer 14, together with the lifting hook 2 and the test counterweight 3, make heaving motions along with the workboat. The first pointer 13 and the second pointer 14 make reciprocating up and down motions relative to the small scale 7 and the large scale 9. The first camera 10 is located on the first pointer (13), and the second camera 11 and the third camera 12 are located on the second pointer 14. The first camera 10, the second camera 11, and the third camera 12 conduct real-time observation on the reciprocating motions of the first pointer 13 and the second pointer 14 relative to the large scale 9 and the small scale 7. The second camera 11 and the third camera 12 observe the relative displacement between the second pointer 14 and the large scale 9 and transmit it to the ship for the debugging personnel to timely adjust the settings of the wave compensation system equipment 1 to be tested. The large scale 9 and the small scale 7 are provided with evenly arranged scale marks, which are brightly colored and are conducive to the first camera 10, the second camera 11, and the third camera 12 to clearly observe them underwater in real time.

[0021] A test method for the test equipment of a wave compensation system, comprising the following steps: Step a, as Figure 1 shown, on the premise that there are waves on the sea surface, the wave compensation system equipment 1 to be tested is fixed on a ship or a floating platform 15, and the lifting hook 2 with a counterweight and a series of test tools is lowered underwater; Step b, as Figure 2As shown in the figure, the scale counterweight 4, the large scale 9, and the second buoyancy ball 8 are lowered to the seabed through the lifting hook 2. At the same time, the test counterweight 3 is placed as close as possible to the middle of the large scale 9, but it should not touch the seabed. At this time, due to the action of the waves, the lifting hook 2, the second pointer 14, and the test counterweight 3 will move up and down with the ship or platform. At this time, the second camera 11 on the second pointer 14 will observe in real time the movement amplitude and movement period of the test counterweight 3 relative to the large scale 9, and transmit this information to the debugging personnel on the working ship in a timely manner, and adjust the parameters of the wave compensation system to make the test counterweight 3 hover stably at a certain height to achieve the expected goal; Step c, as Figure 3 As shown in the figure, after completing step b, the working ship switches the working mode of the wave compensation system, and slowly lowers the test counterweight 3 through the lifting hook 2 until it touches the seabed. The entire landing process, as well as whether there are takeoff and landing changes, will be recorded in a timely manner by the third camera 12 and the information will be transmitted to the debugging personnel on the ship in real time, so as to adjust the wave compensation system until there is no more takeoff and landing movement when the test counterweight 3 lands to achieve the expected goal; Step d, as Figure 4 As shown in the figure, after completing step b and step c, the working ship switches the working mode of the wave compensation system again, continues to lower the height of the lifting hook 2, and makes the steel wire rope 5 in a slack state. Since the steel wire rope 5 is long enough, the lifting hook 2 will not collide with the test counterweight 3. At this time, the lifting hook 2 carrying the first pointer 13 will move up and down reciprocally. The first camera 10 will observe this movement in real time and feedback it to the debugging personnel on the ship in real time. They will adjust the system to make the lifting hook stay stably at a certain height to meet the expected requirements.

[0022] The offshore test equipment and test method of a wave compensation system of the present invention, through two sets of independent scale systems, using real-time cameras, can observe the underwater recording results of each test in real time and transmit them to the debugging personnel on the working ship, who will make timely adjustments to the system to meet the system design expectations. At the same time, this test method is simple to operate and highly practical, and can avoid the assistance of underwater robots.

Claims

1. A test method for a marine test device of a wave and wind compensation system, characterized in that, The offshore test equipment includes the equipment of the wave compensation system to be tested (1), a lifting hook (2), a test counterweight (3), a scale counterweight (4), a steel wire rope (5), a first buoyancy ball (6), a small scale (7), a second buoyancy ball (8), a large scale (9), a first camera (10), a second camera (11), a third camera (12), a first pointer (13), and a second pointer (14). The scale counterweight (4), the large scale (9), and the second buoyancy ball (8) are integrated and sunk to the seabed. The first buoyancy ball (6) is fixed to the test counterweight (3) through the small scale (7). The second buoyancy ball (8) keeps the large scale (9) in a straightened state based on the buoyancy effect. The first pointer (13) is fixed to the lifting hook (2). The first pointer (13), the second pointer (14), together with the lifting hook (2) and the test counterweight (3), perform heaving motions along with the workboat. The first pointer (13) and the second pointer (14) move up and down reciprocally relative to the small scale (7) and the large scale (9). The first camera (10) is located on the first pointer (13). The second camera (11) and the third camera (12) are located on the second pointer (14). The first camera (10), the second camera (11), and the third camera (12) perform real-time observation on the reciprocating motions of the first pointer (13) and the second pointer (14) relative to the large scale (9) and the small scale (7). The second camera (11) and the third camera (12) observe the relative displacement between the second pointer (14) and the large scale (9) and transmit it to the ship for the debugging personnel to use in a timely manner to adjust the settings of the equipment of the wave compensation system to be tested (1). The large scale (9) and the small scale (7) are marked with evenly arranged scale marks. The method includes the following steps: a. On the premise that there are waves on the sea surface, fix the equipment of the wave compensation system to be tested (1) on a ship or a floating platform, and lower the lifting hook (2) with a counterweight and test tools underwater; b. Lower the scale counterweight (4), the large scale (9), and the second buoyancy ball (8) to the seabed through the lifting hook (2). At the same time, place the test counterweight (3) in the middle of the large scale (9) without contacting the seabed. Due to the action of the waves, the lifting hook (2), the second pointer (14), and the test counterweight (3) perform up-and-down heaving motions along with the ship or the floating platform. The second camera (11) located on the second pointer (14) will observe in real time the motion amplitude and motion period of the test counterweight (3) relative to the large scale (9), and transmit the observed information to the debugging personnel on the workboat in a timely manner, and adjust the wave compensation system parameters to make the test counterweight (3) hover stably at a certain height to achieve the expected goal; c. After step b is completed, switch to the working mode of the wave compensation system on the workboat. Slowly lower the test counterweight (3) through the lifting hook (2) until it touches the seabed. The third camera (12) records the entire landing process and any lifting or lowering changes in a timely manner, and transmits the information to the on-board debugging personnel in real time to adjust the wave compensation system until there is no more lifting or lowering movement when the test counterweight (3) lands, so as to achieve the expected goal; d. After steps b and c are completed, switch the working mode of the wave compensation system again on the workboat. Continue to lower the height of the lifting hook (2) so that the wire rope (5) is in a slack state and the lifting hook (2) cannot collide with the test counterweight (3). The lifting hook (2) carrying the first pointer (13) will move up and down reciprocally. Observe this movement through the first camera (10) and feedback it to the on-board debugging personnel in real time to adjust the system so that the lifting hook (2) stays steadily under the water surface to meet the expected requirements.

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