A device for testing the axial load-bearing capacity of submarine pipelines

Abstract

The present invention discloses a device for testing the axial bearing capacity of a submarine pipeline, including a loading platform, a lower end plate, a column, a lifting part and a force-applying platform, wherein the loading platform is carried on the lower end plate, the column is vertically arranged on the lower end plate, the lifting part is arranged on the column and can be lifted and lowered along the column; the force-applying platform is arranged at the lower end of the lifting part; a pulley is arranged under the loading platform, and a positioning mechanism capable of directly acting on the loading platform is also arranged on the lower end plate. By adopting the present invention, the pipeline to be tested can be carried by the loading platform provided with a pulley, and the pipeline and the force-applying platform can be aligned, so as to facilitate the adjustment before the pipeline is tested. A positioning mechanism capable of directly acting on the loading platform is also arranged on the lower end plate, and the loading platform after the position is adjusted is fixed by the positioning mechanism, so as to prevent the movement of the loading platform during the test from affecting the test results, and also to prevent the pressure during the test from acting on the pulley and affecting the life of the pulley.

Description

Technical Field

[0001] The invention relates to a pipeline testing device, in particular to a submarine pipeline axial bearing capacity testing device. Background Art

[0002] The test of submarine pipeline samples includes the test of their axial bearing capacity. The existing test method is to place the sample in a press, apply axial pressure to the sample, and then obtain data. However, the pipe as a sample is heavy and difficult to load and unload; it is difficult to move after being placed on the bearing platform, which is not conducive to moving to the test position. The test is cumbersome and wastes a lot of manpower and time. Summary of the invention

[0003] In order to solve the technical problem of difficult loading and unloading of existing submarine pipeline axial bearing capacity test, the present invention provides a submarine pipeline axial bearing capacity test device, which can conveniently adjust the position of the pipeline before testing and has high measurement accuracy.

[0004] In order to solve the above technical problems, the present invention provides a submarine pipeline axial bearing capacity testing device, including a loading platform, a lower end plate, a column, a lifting part and a force application platform, wherein the loading platform is carried on the lower end plate, the column is vertically arranged on the lower end plate, the lifting part is arranged on the column and can be lifted and lowered along the column; the force application platform is arranged at the lower end of the lifting part; a pulley is arranged under the loading platform, and a positioning mechanism that can directly act on the loading platform is also arranged on the lower end plate.

[0005] As an improvement of the above solution, the column is a bare rod, and the lifting part is connected to a lifting cylinder.

[0006] As an improvement of the above solution, the column is a lead screw, and a lifting nut cooperating with the lead screw is provided in the lifting part, and the lifting nut is connected to the lifting motor.

[0007] As an improvement of the above solution, there are two columns in total, and lifting nuts are respectively provided on both sides of the lifting part, and the lifting nuts are connected to the lifting motor through a synchronous transmission rod.

[0008] As an improvement of the above solution, the positioning mechanism is a hydraulic cylinder, and its hydraulic rod can be extended upward to fix the loading platform.

[0009] As an improvement of the above solution, a fixed block is provided on the top of the column, a height scale is vertically provided on the fixed block, and a height pointer cooperating with the height scale is provided on one side of the lifting part.

[0010] As an improvement of the above solution, a reinforcing rib is provided at the bottom of the loading platform, and the pulley is arranged at the bottom of the reinforcing rib.

[0011] As an improvement of the above solution, an operating table is further provided on one side of the column.

[0012] The implementation of the present invention has the following beneficial effects:

[0013] By adopting the present invention, the pipeline to be tested can be carried by a loading platform provided with a pulley, and the pipeline and the force-applying platform can be aligned, so as to facilitate the adjustment before pipeline testing. The lower end plate is also provided with a positioning mechanism that can directly act on the loading platform. The positioning mechanism can fix the loading platform after the position is adjusted, so as to prevent the movement of the loading platform during the test process from affecting the test results, and also prevent the pressure of the test process from acting on the pulley and affecting the life of the pulley. The force-applying platform is provided at the lower end of the lifting part. As the lifting part rises and falls, it cooperates with the loading platform to apply gradually increasing pressure to the pipeline, so as to complete the test of the axial bearing capacity of the submarine pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a submarine pipeline axial bearing capacity testing device according to the present invention in the main viewing direction;

[0015] Figure 2 It is a structural schematic diagram of the lifting part of the present invention;

[0016] Figure 3 is a structural cross-sectional view of another embodiment of the lifting part of the present invention;

[0017] Figure 4 It is a schematic structural diagram of a submarine pipeline axial load-bearing capacity testing device of the present invention in a side view direction. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0019] like Figure 1 and Figure 4 As shown, a specific embodiment of the present invention provides a submarine pipeline axial bearing capacity testing device, including a loading platform 1, a lower end plate 2, a column 3, a lifting part 4 and a force application platform 5, wherein the loading platform 1 is carried on the lower end plate 2, the column 3 is vertically arranged on the lower end plate 2, the lifting part 4 is arranged on the column 3, and can be lifted and lowered along the column 3; the force application platform 5 is arranged at the lower end of the lifting part 4; a pulley 6 is arranged under the loading platform 1, and a positioning mechanism 7 that can directly act on the loading platform 1 is also arranged on the lower end plate 2.

[0020] By adopting the present invention, the pipeline to be tested can be carried by the loading platform 1 provided with a pulley 6, and the pipeline can be aligned with the force-applying platform 5, so as to facilitate the adjustment before pipeline testing. The lower end plate 2 is also provided with a positioning mechanism 7 that can directly act on the loading platform 1. The positioning mechanism 7 fixes the loading platform 1 after the position is adjusted, so as to prevent the movement of the loading platform 1 during the test process from affecting the test results, and also prevent the pressure during the test process from acting on the pulley 6, which affects the life of the pulley 6 on the one hand and the test accuracy on the other hand. The force-applying platform 5 is provided at the lower end of the lifting part 4. As the lifting part 4 is raised and lowered, it cooperates with the loading platform 1 to apply gradually increasing pressure to the pipeline, so as to complete the test of the axial bearing capacity of the submarine pipeline.

[0021] Preferably, combined Figure 2 As shown, the column 3 is a bare rod, and the lifting part 4 is connected to a lifting cylinder 17. One end of the lifting cylinder is fixedly connected to the top of the column 3, and the other end is connected to the lifting part 4. When the lifting cylinder is extended or retracted, the lifting part 4 can be driven to rise or fall.

[0022] Combination Figure 3 As shown, as another embodiment of the lifting part 4, the column 3 is a lead screw, and a lifting nut 8 cooperating with the lead screw is provided in the lifting part 4, and the lifting nut 8 is connected to the lifting motor 9. More preferably, there are two columns 3, and lifting nuts 8 are provided on both sides of the lifting part 4, respectively, and the lifting nuts 8 are connected to the lifting motor 9 through a synchronous transmission rod 10. It should be noted that the lifting motor 9 is driven to rotate through the synchronous transmission rod 10, thereby driving the lifting nut 8 to rotate, and finally driving the lifting part 4 to lift as a whole.

[0023] Preferably, the positioning mechanism 7 is a hydraulic cylinder, and its hydraulic rod can be extended upward to fix the loading platform 1.

[0024] In order to conveniently display the distance between the loading platform 1 and the force application platform 5 , a fixed block 11 is provided on the top of the column 3 , a height scale 12 is vertically provided on the fixed block 11 , and a height pointer 13 cooperating with the height scale 12 is provided on one side of the lifting part 4 .

[0025] Preferably, the bottom of the loading platform 1 is provided with a reinforcing rib 14, and the pulley 6 is arranged at the bottom of the reinforcing rib 14. The reinforcing rib 14 is a vertically arranged plate used to reinforce the loading platform 1 to prevent the loading platform 1 from affecting the test accuracy due to local bending.

[0026] Preferably, an operating platform 15 is further provided on one side of the column 3. Through the operating platform 15, the force application platform 5 can be controlled to descend while observing the condition of the object to be measured.

[0027] The working principle of the device is as follows: take a section of pipe sample 16 with external defects, connect it to a mechanical sensor and place it on the loading platform 1 of the device. By moving the loading platform 1, the pipe sample is aligned with the force application platform 5. The hydraulic rod of the positioning mechanism 7 is extended to lift the loading platform 1, and the pulley 6 at the bottom of the loading platform 1 is separated from the lower end plate 2, so that the loading platform 1 is reliably positioned. The lifting part 4 is controlled to descend through the control console so that the force application platform 5 contacts the top of the pipe, and then axial pressure is gradually applied to the pipe. The stress and strain of the pipe during the pressure application process are measured by the mechanical sensor. The measurement ends when the pipe is crushed, and the maximum load-bearing capacity of the pipe when it is crushed is obtained.

[0028] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A submarine pipeline axial bearing capacity testing device, characterized in that: It includes a loading platform, a lower end plate, a column, a lifting part and a force application platform; The loading platform is carried on the lower end plate, the column is vertically arranged on the lower end plate, and the lifting part is arranged on the column and can be lifted and lowered along the column; The force application platform is arranged at the lower end of the lifting part; A pulley is provided under the loading platform, and a positioning mechanism that can directly act on the loading platform is also provided on the lower end plate, and the loading platform after the position is adjusted is fixed by the positioning mechanism.

2. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 1, characterized in that: The column is a bare rod, and the lifting part is connected with a lifting cylinder.

3. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 1, characterized in that: The column is a lead screw, and a lifting nut matched with the lead screw is arranged in the lifting part, and the lifting nut is connected to the lifting motor.

4. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 3, characterized in that: There are two columns in total, and lifting nuts are respectively arranged on both sides of the lifting part, and the lifting nuts are connected to the lifting motor through a synchronous transmission rod.

5. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 1, characterized in that: The positioning mechanism is a hydraulic cylinder, and its hydraulic rod can be extended upward to fix the loading platform.

6. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 1, characterized in that: A fixing block is arranged on the top of the column, a height scale is vertically arranged on the fixing block, and a height pointer cooperating with the height scale is arranged on one side of the lifting part.

7. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 1, characterized in that: The bottom of the loading platform is provided with reinforcing ribs, and the pulley is arranged at the bottom of the reinforcing ribs.

8. The device for testing the axial load-bearing capacity of a submarine pipeline according to claim 1, characterized in that: An operating table is also provided on one side of the column.

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