Roll-on / roll-off ship movable deck load test device and method

Abstract

The application discloses a roll-on / roll-off ship movable deck load test device and method, which comprises two fixed decks, a structural girder, a movable deck and a plurality of jacking devices. The two fixed decks are horizontally and fixedly installed in the hold of the roll-on / roll-off ship. The structural girder is horizontally installed between the two fixed decks. The movable deck can be horizontally installed at any position between the two fixed decks and below the structural girder. One end of each jacking device is connected with the structural girder, and the other end is connected with the movable deck. The device and method provided by the application reduce a large amount of lifting and carrying operations, improve the efficiency of the movable deck load test, reduce the workload of the load test, shorten the pressure test time and improve the safety of the test.

Description

Technical Field

[0001] This application relates to the field of marine equipment technology, and in particular to a test device and method for the load on the movable deck of a roll-on / roll-off ship. Background Technology

[0002] Ro-Ro ships are vessels that load and unload vehicles or other wheeled palletized cargo using ramps. To meet the needs of various cargo loading requirements, the cargo holds of Ro-Ro ships are generally designed with fixed deck heights based on the loading height requirements of large trucks. However, the fixed deck height is relatively large, resulting in wasted space during loading and unloading. Therefore, a movable deck is often installed between the fixed decks. When loading large trucks, the movable deck is stored at the top of the deck to meet the loading height requirements of large trucks; when only cars need to be loaded, the movable deck is lowered and fixed at a certain height between the upper and lower fixed decks, allowing loading and unloading between the lower fixed deck and the movable deck, as well as between the movable deck and the upper fixed deck, thus doubling the loading capacity. To ensure the reliability of the movable deck during cargo loading, a load test of a certain load-bearing pressure must be strictly conducted on board the ship after the movable deck is installed, in accordance with industry and relevant specifications. The load test method for the movable deck is to place weighted weights on the movable deck to verify whether the load-bearing capacity and deformation of the movable deck structure and its supports meet the design parameters.

[0003] The current method for load testing of mobile decks involves placing a large number of heavy-tonnage ballasts on the mobile deck. This requires a large amount of lifting and maintenance equipment. However, due to the limited space in the ship's cargo hold, large lifting equipment cannot be used, and only small equipment such as small forklifts can be used. This makes it very difficult and inefficient to move and lift heavy-tonnage ballasts in the garage during the load test. For roll-on / roll-off ships with a large number of mobile decks, the load test of mobile decks takes a lot of time and poses high safety hazards. On the other hand, the forklifts and other auxiliary equipment required to move heavy-tonnage ballasts require high environmental requirements and can only be done under conditions of high on-site engineering integrity. This determines that the traditional mobile deck load test takes a long time and greatly restricts the progress of the entire project.

[0004] To solve the above problems, there is an urgent need for a load testing method that is less dependent on auxiliary equipment, more versatile, and more efficient. Summary of the Invention

[0005] The purpose of this application is to provide a roll-on / roll-off ship movable deck load testing device and method, which can solve the above-mentioned problems existing in the prior art, reduce a large amount of lifting and handling operations, improve the efficiency of movable deck load testing, reduce the workload of load testing, reduce the pressure testing time, and improve the safety of testing.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] On the one hand, a roll-on / roll-off ship movable deck load testing device is provided, comprising:

[0008] The ship comprises two fixed decks, a structural beam, a movable deck, and several support devices. The two fixed decks are horizontally fixed within the hangar of the roll-on / roll-off vessel. The structural beam is horizontally installed between the two fixed decks. The movable deck can be horizontally installed at any position between the two fixed decks and is located below the structural beam. One end of each support device is connected to the structural beam, and the other end is connected to the movable deck. Each support device includes a cylinder body, a piston, a piston rod, a support bracket, a pressure-holding connecting pipe, and a pressure regulating valve. The piston is movably housed within the cylinder body and... The cylinder body is internally divided into an upper oil chamber and a lower oil chamber. One end of the piston rod is connected to the piston, and the other end extends out of the upper oil chamber. One end of the top support bracket is connected to the piston rod, and the other end abuts against the bottom of the structural beam. The pressure-holding connecting pipe connects the upper oil chamber and the lower oil chamber. The pressure regulating valve is installed on the pressure-holding connecting pipe. The upper oil chamber and the lower oil chamber are respectively connected to the hydraulic pump station through pipelines. The pressure regulating valve is used to adjust the pressure difference between the upper oil chamber and the lower oil chamber so that the pressure between the upper oil chamber and the lower oil chamber reaches a preset balance point.

[0009] In some embodiments, the pressure-holding connecting pipe is further provided with a differential pressure gauge that can display the pressure difference between the upper oil chamber and the lower oil chamber.

[0010] In some embodiments, the top support device includes a base mounted on the movable deck, and the cylinder body is mounted on the base.

[0011] In some embodiments, the top support bracket includes a main frame and a top support portion. The main frame is installed between the piston rod and the structural beam, and the top support portion is disposed on the upper part of the main frame and abuts against the structural beam.

[0012] In some embodiments, the top support has a "V" shaped structure.

[0013] In some embodiments, a connecting end is provided between the main frame and the piston rod.

[0014] In some embodiments, a support base is also included, which is respectively installed on both sides of the hangar, and the movable deck is fixedly installed on the support base.

[0015] A method for testing the load on the movable deck of a roll-on / roll-off (Ro-Ro) ship, using the Ro-Ro ship movable deck load testing device as described in any of the above, the method is as follows: s1, determine the load application points and number based on the load requirements and dimensions of the movable deck load test;

[0016] s2, Select the location of the load application point on the movable deck, requiring that the load application point be directly above the structural beam;

[0017] s3, Install each support device at the predetermined load application point;

[0018] s4, the top of each top support bracket abuts against the upper structural beam;

[0019] s5, each jacking device is connected to the hydraulic pump station via pipelines;

[0020] s6, through the operation of the hydraulic pump station, pressurizes the cylinder body, so that the movable deck is subjected to top support. Under the stress condition of a specified time, the performance condition of the movable deck required for the load test is checked.

[0021] In some embodiments, in step s6, when the hydraulic pump station continuously pumps hydraulic oil into the lower oil chamber, the pressure difference between the lower oil chamber and the upper oil chamber continuously increases. When the pressure difference between the upper oil chamber and the lower oil chamber reaches the set pressure value of the pressure regulating valve, the upper oil chamber and the lower oil chamber are connected.

[0022] In some embodiments, the number of load application points is n, where n ≥ 6.

[0023] The beneficial effects of this application are as follows: The use of a top-support device to support the movable deck replaces the conventional pressure iron test method, reducing the lifting and handling work of the movable deck load test beam, improving the efficiency of the movable deck load test, reducing the workload of the load test, shortening the test time, and improving the safety of the test. By adjusting the hydraulic thrust of the top-support device, different test conditions can be adapted. Specifically, the top-pushing pressure on the movable deck is precisely controlled by adjusting the preset pressure value of the pressure regulating valve. When different pressure load tests are required on the same movable deck, only the set pressure value of the pressure regulating valve needs to be adjusted, eliminating the need for multiple installations and adjustments of the test fixtures, greatly improving the efficiency of the experiment. It also greatly improves the versatility of the test equipment, reducing the number and specifications of different types of equipment. Furthermore, it reduces the requirements of the construction environment for the load test, creating conditions for advancing the movable deck load test and thus reducing constraints on the overall project schedule. Attached Figure Description

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Figure 1This is a schematic diagram of the structure of the roll-on / roll-off ship movable deck load testing device described in the embodiments of this application. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the supporting device described in the embodiments of this application;

[0027] Figure 3 This is a schematic diagram of the top support bracket described in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the roll-on / roll-off ship active deck load test method described in the embodiments of this application.

[0029] In the diagram: 1. Fixed deck; 2. Structural beam; 3. Movable deck; 4. Top support device; 401. Top support bracket; 402. Cylinder body; 403. Piston; 404. Piston rod; 405. Upper oil chamber; 406. Lower oil chamber; 407. Base; 408. Pressure holding connecting pipe; 409. Pressure regulating valve; 410. Differential pressure gauge; 411. Connection end; 412. First hydraulic pipe; 413. Second hydraulic pipe; 414. Connecting valve block; 415. Main frame; 416. Top support part; 5. Hydraulic pump station; 6. Support base. Detailed Implementation

[0030] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] like Figure 1 , Figure 2 As shown, this embodiment provides a load testing device for a roll-on / roll-off (Ro-Ro) ship's movable deck, comprising: two fixed decks 1, a structural beam 2, a movable deck 3, and several top support devices 4; the two fixed decks 1 are horizontally fixedly installed in the hangar of the Ro-Ro ship, the structural beam 2 is horizontally installed between the two fixed decks 1, and the movable deck 3 can be horizontally installed at any position between the two fixed decks 1 and located below the structural beam 2; one end of each top support device 4 is connected to the structural beam 2, and the other end is connected to the movable deck 3; each top support device 4 includes a cylinder body 402, a piston 403, a piston rod 404, a top support bracket 401, a pressure holding connecting pipe 408, and a pressure regulating valve 409; the piston 403 is movably disposed on the cylinder body 402 and... The cylinder body 402 is internally divided into an upper oil chamber 405 and a lower oil chamber 406. One end of the piston rod 404 is connected to the piston 403, and the other end extends out of the upper oil chamber 405. One end of the top support bracket 401 is connected to the piston rod 404, and the other end abuts against the bottom of the structural beam 2. The pressure-holding connecting pipe 408 connects the upper oil chamber 405 and the lower oil chamber 406. The pressure regulating valve 409 is installed on the pressure-holding connecting pipe 408. The upper oil chamber 405 and the lower oil chamber 406 are respectively connected to the hydraulic pump station 5 through pipelines. The pressure regulating valve 409 is used to adjust the pressure difference between the upper oil chamber 405 and the lower oil chamber 406 so that the pressure between the upper oil chamber 405 and the lower oil chamber 406 reaches a preset balance point.

[0034] Based on the above scheme, the movable deck 3 can slide between the two fixed decks 1. During load testing, the movable deck 3 needs to be fixed in any position. The top support device 4 is set between the structural beam 2 and the movable deck 3. Under hydraulic push, the top support device 4 exerts force between the structural beam 2 and the movable deck 3, thereby testing the performance of a certain position of the movable deck 3. The number of top support devices 4 is determined according to the load points to be tested on the movable deck 3. The working principle of the top support device 4 is as follows: Hydraulic oil is continuously pumped into the lower oil chamber 406 through the hydraulic pump station 5. The amount of hydraulic oil in the lower oil chamber 406 increases, the pressure increases, and the pressure on the piston 403 and piston rod 404 from the lower oil chamber 406 increases. The force acting on the top support bracket 401 also increases, and the force between the top support bracket 401 and the structural beam 2 increases. Therefore, the reaction force of the movable deck 3 on the top support device 4 also increases. When the lower oil chamber 406 is continuously pressurized, the upper oil chamber 40... The pressure difference between the upper oil chamber 405 and the lower oil chamber 406 will gradually increase. When the pressure difference reaches the preset pressure value of the pressure regulating valve 409, the pressure-holding connecting pipe 408 connecting the upper oil chamber 405 and the lower oil chamber 406 will be opened, keeping the pressure difference between the upper oil chamber 405 and the lower oil chamber 406 within the preset range. In other words, the pressure value set by the pressure regulating valve 409 is the test pressure value of the movable deck 3. Therefore, only the preset pressure value of the pressure regulating valve 409 needs to be adjusted to regulate the test pressure acting on the movable deck 3. The top support device 4 is used to replace the pressure iron and other components for the test. The top support device 4 has greater versatility, is more convenient to adjust, and the efficiency of the test is greatly improved.

[0035] In the application of the above-mentioned device, the pressure-holding connecting pipe 408 is also equipped with a differential pressure gauge 410 that displays the pressure difference between the upper oil chamber 405 and the lower oil chamber 406. Let the area of ​​the lower oil chamber 406 of the cylinder body 402 be S, and the pressure displayed value of the differential pressure gauge 410 be P. Then, the upward thrust F of the piston rod 404 is F = S * P. The value displayed by the differential pressure gauge 410 needs to correspond to the preset pressure value of the pressure regulating valve 409. Accurate verification between the two is necessary for precise control during adjustment and for operators to accurately read the current pressure status for testing.

[0036] Optionally, the top support device 4 includes a base 407, which is mounted on the movable deck 3, and the cylinder body 402 is mounted on the base 407. The base 407 is provided to better connect the cylinder body 402 and the movable deck 3. The base 407 is fastened to the movable deck 3 by fastening bolts or other means, and the base 407 is also fastened to the cylinder body 402 by fastening bolts or other means to prevent slippage under force, which could lead to errors in the test results.

[0037] To ensure stable contact between the top support bracket 401 and the structural beam 2, such as Figure 3 As shown, the top support bracket 401 includes a main frame 415 and a top support portion 416. The main frame 415 is installed between the piston rod 404 and the structural beam 2. The top support portion 416 is located on the upper part of the main frame 415 and abuts against the structural beam 2. The top support portion 416 has a "V" shape. The V-shaped top support portion 416 includes a bottom end and two branch ends. The bottom end is fixedly connected to the main frame 415 or integrally formed. The two branch ends are flush with the top end of the main frame 415 and abut against the bottom of the structural beam 2. The three points of support at the bottom of the structural beam 2 ensure the stability of the connection between the structural beam 2 and the top support bracket 401. Both the main frame 415 and the top support portion 416 are locked to the structural beam 2 by bolts or screws.

[0038] In some embodiments, a connecting end 411 is provided between the main frame 415 and the piston rod 404. The main frame 415 is rod-shaped, and the connection between the rod-shaped main frame 415 and the rod-shaped piston rod 404 is achieved through the connecting end 411. The connecting end 411 has a platform-shaped structure. By connecting the two rods with the connecting end 411, the connection between the main frame 415 and the piston rod 404 can be ensured to be stable, and deflection will not occur under pressure.

[0039] To ensure the movable deck 3 can be stably installed in front of the two fixed decks 1, support seats 6 are provided. These support seats 6 are installed on both sides of the hangar, and the movable deck 3 is fixedly installed on the support seats 6. The movable deck 3 and the support seats 6 are connected by fasteners such as bolts or screws to ensure stability and prevent detachment when the movable deck 3 is subjected to top support forces. Furthermore, to facilitate performance testing of the movable deck 3 in different positions, the support seats 6 can be made sliding, movable up and down and locked, allowing adjustment of the vertical position of the movable deck 3 for testing and adjustment purposes.

[0040] In the scheme described above, assuming that the load pressure required for the load test of one of the movable decks 3 is F, and the load test uses n support devices 4, the preset pressure value of the pressure regulating valve 409 on the first support device is P1, and the area of ​​the lower oil chamber 406 is S1, the preset pressure value of the pressure regulating valve 409 on the second support device is P2, and the area of ​​the lower oil chamber 406 is S2, and so on, the preset pressure value of the pressure regulating valve 409 on the nth support device is Pn, and the area of ​​the lower oil chamber 406 is Sn. Since the pressure of the hydraulic oil output by the hydraulic pump station 5 is greater than the preset pressure value of all pressure regulating valves 409, that is, the pressure difference between the lower oil chamber 406 and the upper oil chamber 405 of all support devices 4 is equal to the preset pressure value of their respective pressure regulating valves 409, at this time, as long as S1*P1+S2*P2+……+Sn*Pn=F, the jacking force applied to the movable deck 3 by all support devices 4 is equal to the pressure required for the load test of the movable deck.

[0041] Generally, it is preferred that the lower oil chamber 406 of the top support device 4 used has the same area and the preset pressure value of the pressure regulating valve 409. This ensures that the top support force acting on the movable deck 3 at each point is the same, guarantees that the total thrust meets the test requirements, and facilitates control and adjustment. Furthermore, considering that the weight distribution of the items carried by the movable deck 3 is likely to be uneven, it is necessary to adjust the specific values ​​of each top support device 4. For example, for items with a center of gravity in the middle, the product of the lower oil chamber 406 area and the preset pressure of the top support device 4 set in the middle needs to be higher than that of other top support devices 4. Similarly, items can be roughly classified according to their center of gravity: those in the middle, those towards the rear, and those towards the front. The pressure exerted by the top support device 4 on the movable deck 3 can be adjusted according to these different situations to test whether the movable deck 3 meets different test requirements.

[0042] Optionally, each support device 4 is connected to the same hydraulic pump station 5 via hydraulic pipes, and the hydraulic pressure delivered to each support device 4 is regulated by valves on the hydraulic pipes. Alternatively, depending on different requirements, each support device 4 can be configured with a separate hydraulic pump station 5, which allows for higher adjustment precision and is suitable for highly precise test items for the movable deck 3.

[0043] To further illustrate the connection between the jacking device 4 and the hydraulic pump station 5, optionally, a first hydraulic pipe 412, a second hydraulic pipe 413, and a connecting valve block 414 are also included. One end of the first hydraulic pipe 412 is connected to the upper oil chamber 405, and the other end is connected to the connecting valve block 414. One end of the second hydraulic pipe 413 is connected to the lower oil chamber 406, and the other end is connected to the connecting valve block 414. The connecting valve block 414 can be connected to the hydraulic pump station 5 through the main hydraulic pipe. The liquid output by the hydraulic pump station 5 can enter the upper oil chamber 405 and the lower oil chamber 406 through the connecting valve block 414, the first hydraulic pipe 412, and the second hydraulic pipe 413, respectively. By pressurizing the upper oil chamber 405 and the lower oil chamber 406 respectively, the pressure difference between the two can also be controlled. This can be used as a backup scheme for adjusting the pressure difference. It works better when used in conjunction with the pressure regulating valve 409.

[0044] like Figure 4 As shown, this embodiment provides a method for testing the load on the movable deck of a roll-on / roll-off (Ro-Ro) ship, using the Ro-Ro ship movable deck load testing device as described in any of the above embodiments. The method is as follows:

[0045] s1. Determine the load application points and number based on the load requirements and dimensions of the movable deck load test;

[0046] s2. Select the location of the load application point for the active deck load test, requiring that the load application point be directly above the structural beam 2;

[0047] s3. According to the installation process requirements, the movable deck 3 is installed on the support base 6, and it is confirmed that the movable deck 3 is in good contact with all the support bases 6 and there is no gap;

[0048] s4. Install the top support device 4 at the predetermined load application point of the movable deck, and fasten the top support device 4 to the movable deck 3 by fastening bolts or other means to prevent it from slipping under force;

[0049] s5. One end of the top support bracket 401 is connected to the connecting end 411 of the piston rod 404 on the top support device 4, and the other end of the top support bracket 401 abuts against the upper structural beam 2. The connecting end 411 of the top support device 4 and the piston rod 404 and the structural beam 2 are fastened to the movable deck 3 by fastening bolts or other means to prevent slippage under force.

[0050] s6. The hydraulic pump station 5 is connected to each jacking device 4 via hydraulic pipes;

[0051] s7. By operating the hydraulic pump station 5, the cylinder body 402 in the top support device 4 is pressurized, so that the movable deck 3 is subjected to the top support action. Under the stress condition of a specified duration, the performance condition required to be confirmed by the load test, such as the deformation of the movable deck 3, is checked.

[0052] In the above steps, as the hydraulic pump station 5 continuously pumps hydraulic oil into the lower oil chamber 406, the pressure difference between the lower oil chamber 406 and the upper oil chamber 405 continuously increases. When the pressure difference between the upper oil chamber 405 and the lower oil chamber 406 reaches the set pressure value of the pressure regulating valve 409, a connection is formed between the upper oil chamber 405 and the lower oil chamber 406. At this point, even if the pressure in the lower oil chamber 406 continues to be increased, the pressure difference between the lower oil chamber 406 and the upper oil chamber 405 will remain at the set pressure value of the pressure regulating valve 409 and will not continue to rise. At this time, the pressure between the lower oil chamber 406 and the upper oil chamber 405 reaches an equilibrium point. That is, when the pressure of the hydraulic oil output by the hydraulic pump station 5 is greater than the actual required pressure, the magnitude of the jacking force F output by the jacking device 4 can be controlled by setting the pressure of the pressure regulating valve 409 on the jacking device 4.

[0053] Preferably, the number of load application points is n, where n≥6. The number of load application points needs to be adjusted adaptively depending on the test conditions, and the number of load application points needs to match the number of support devices 4. To ensure the accuracy and reliability of the test data, it is preferable to have at least six load application points and at least six support devices 4; setting at least six points will yield more accurate test data.

[0054] Based on the different testing requirements of the aforementioned test apparatus, the number of top support devices 4 can be adjusted accordingly. For example, five top support devices 4, evenly distributed at intervals on the movable deck 3, can be used for tests requiring high precision in various parts of the movable deck 3. For tests where the precision requirements for the movable deck 3 are not high, the number of top support devices 4 can be reduced, such as three or two. Three devices are more suitable, with three top support devices 4 installed at the front, middle, and rear positions of the movable deck 3, respectively, to obtain the test data for the movable deck 3. With two top support devices 4, they only need to be spaced apart. For projects where the movable deck 3 is relatively long and the testing requirements are very high, the number of top support devices 4 can be increased, such as to seven or more, depending on the specific circumstances to meet the testing requirements.

[0055] Furthermore, the specific execution of the test can be adjusted according to different situations. For example, in a test item with seven top support devices 4, if a pressure and deformation test is required at a certain position of the movable deck 3, the top support device 4 located at or near that position can be pressurized separately. The test pressure can be the average value of the total pressure, or the maximum load-bearing capacity can be obtained by gradually increasing the pressure on the average value. In this way, the test can be rationally adjusted according to the needs of the test, so that the test device can meet the test items with different needs.

[0056] In the above scheme, each pressure regulating valve 409 is electrically connected to the controller. The controller can adjust the preset pressure value of the pressure regulating valve 409 in real time. Under the condition that the total pressure remains unchanged, the pressure regulating valve 409 can be continuously and adaptively adjusted to test the performance data of the moving deck 3 when the object is developing swaying.

[0057] In summary, this application, by employing a hydraulic jacking method, reduces the extensive lifting and handling operations required for the movable deck load test, thereby improving the efficiency of the load test, reducing the workload, shortening the test time, and enhancing the safety of the test. The precise control of the jacking pressure through the adjustment of the pressure regulating valve 409 allows for adaptability to different load pressure test requirements with a single installation, significantly improving test efficiency. The same test fixture can meet different load test pressure requirements, greatly enhancing the versatility of the test fixture. Furthermore, the test device for the movable deck load test method for roll-on / roll-off ships provided in this application is lightweight and easy to install, reducing the requirements for site and handling equipment, and creating feasible conditions for advancing the overall project schedule.

[0058] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0059] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0061] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A ro-ro ship active deck load test device, characterized by, The application relates to a rolling ship movable deck load test device which comprises two fixed decks (1), a structural girder (2), a movable deck (3) and a plurality of top supporting devices (4), the two fixed decks (1) are fixedly arranged in cabins of the rolling ship in a horizontal mode, the structural girder (2) is arranged between the two fixed decks (1) in a horizontal mode, the movable deck (3) can be arranged at any position between the two fixed decks (1) in a horizontal mode and is arranged below the structural girder (2), one end of each top supporting device (4) is connected with the structural girder (2), and the other end is connected with the movable deck (3), the top supporting device (4) comprises a top supporting bracket (401), an oil cylinder body (402), a piston (403), a piston rod (404), a pressure maintaining communication pipe (408) and a pressure regulating valve (409), the piston (403) is movably arranged in the oil cylinder body (402) and separates the oil cylinder body (402) into an upper oil cavity (405) and a lower oil cavity (406), one end of the piston rod (404) is connected with the piston (403), and the other end extends out of the upper oil cavity (405), one end of the top supporting bracket (401) is connected with the piston rod (404), and the other end abuts against the bottom of the structural girder (2), the pressure maintaining communication pipe (408) communicates the upper oil cavity (405) and the lower oil cavity (406), the pressure regulating valve (409) is arranged on the pressure maintaining communication pipe (408), the upper oil cavity (405) and the lower oil cavity (406) are respectively connected with a hydraulic pump station (5) through pipelines, and the pressure regulating valve (409) is used for regulating the pressure difference between the upper oil cavity (405) and the lower oil cavity (406) so that the pressure between the upper oil cavity (405) and the lower oil cavity (406) reaches a preset balance point. The top supporting device (4) comprises a base (407), the base (407) is arranged on the movable deck (3), and the oil cylinder body (402) is arranged on the base (407). The top supporting bracket (401) comprises a main frame body (415) and a top supporting part (416), the main frame body (415) is arranged between the piston rod (404) and the structural girder (2), and the top supporting part (416) is arranged on the upper portion of the main frame body (415) and abuts against the structural girder (2). The top supporting part (416) is in a "V" shape structure. A pressure difference table (410) for displaying the pressure difference between the upper oil cavity (405) and the lower oil cavity (406) is arranged on the pressure maintaining communication pipe (408).

2. The RoRo ship activity deck load testing arrangement according to claim 1, characterized in that, A connecting end (411) is arranged between the main frame body (415) and the piston rod (404).

3. The RoRo ship activity deck load testing apparatus according to claim 1, characterized in that, Supporting bases (6) are arranged on the two sides of the cabins, and the movable deck (3) is fixedly arranged on the supporting bases (6).

4. The RoRo ship variable deck load testing apparatus according to claim 1, characterized in that, The rolling ship movable deck load test device is used in the following method: s1, according to the bearing requirement and size of the movable deck load test, the pressure test loading points and the number are determined.

5. A method of testing a load on a mobile deck of a ro-ro ship, characterized by, ​ s2, select the position of the load point on the movable deck (3), and require the load point position to be directly above the structure beam (2); s3, install each jacking device (4) on the predetermined load point; s4, the top of each jacking bracket (401) abuts against the structure beam (2) above; s5, each jacking device (4) is connected to the hydraulic pump station (5) through a pipeline; s6, work through the hydraulic pump station (5) to pressurize the oil cylinder body (402), so that the movable deck (3) is jacked, and under the condition of a specified time length, the performance required to be confirmed by the movable deck load test is checked.

6. The method of load testing a roll-on / roll-off vessel's movable deck of claim 5, wherein, In the above steps, when the hydraulic pump station (5) continuously injects hydraulic oil into the lower oil chamber (406), the pressure difference between the lower oil chamber (406) and the upper oil chamber (405) increases continuously, and when the pressure difference between the upper oil chamber (405) and the lower oil chamber (406) reaches the preset pressure value of the pressure regulating valve (409), the upper oil chamber (405) and the lower oil chamber (406) are connected.

7. The method of load testing a mobile deck of a ro-ro ship according to claim 5, wherein, The number of load points is n, wherein n≥6.

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