Testing device for simulating influence of rolling stone impact on buried pipeline

Abstract

The utility model relates to the field of test equipment, in particular to a test device for simulating the influence of rolling stone impact on a buried pipeline. The utility model discloses a test device for simulating the influence of rolling stone impact on a buried pipeline. The test device comprises a rolling stone arranged at a high position; the device comprises a box body located on the ground; a guide rail for falling of the rolling stone is arranged between the rolling stone and the pipeline; a soil body is embedded in the box body, and a test pipeline is embedded in the soil body; a testing device is further buried in the soil body; the system further comprises an external computer. The testing device is connected with an external computer. By adjusting the initial height of the rolling stone, the pipeline mechanical response rules under different rolling stone shapes, different soil body parameters, different pipeline parameters, different rolling angles and different rolling speeds can be researched, and the test device is high in operability, good in repeatability, easy and convenient to operate and high in practicability. The research result has important significance for guaranteeing the safety of the pipeline under the rolling stone.

Description

Technical Field

[0001] The utility model relates to the field of test equipment, in particular to a test device for simulating the influence of rolling stone impact on buried pipelines. Background Art

[0002] Buried pipelines are the most economical and reliable choice for long-distance transportation of oil and gas, but due to their wide range and complex terrain, their structural safety and reliability have received extensive attention. The impact of rolling stones on pipelines in mountainous areas cannot be ignored. Understanding the impact of rolling stones on buried pipelines is of great significance to ensuring the safety and reliability of underground pipelines. For this reason, we designed a test device to simulate the impact of rolling stones on buried pipelines. Summary of the invention

[0003] The utility model aims to solve the above problems and proposes a test device for simulating the influence of rolling stone impact on buried pipelines.

[0004] The technical solution of the utility model is:

[0005] A test device for simulating the impact of a rolling stone on an underground pipeline, comprising a rolling stone arranged at a high place; a box located on the ground; a guide rail for the rolling stone to fall is arranged between the rolling stone and the pipeline; soil is buried in the box, and a test pipeline is buried in the soil; a test device is also buried in the soil; and an external computer is also included; the test device is connected to the external computer.

[0006] Among them, the testing device includes a strain gauge arranged on the pipeline, a soil pressure box arranged in the soil body, and a camera; the camera, strain gauge and soil pressure box are all electrically connected to an external computer; the camera, strain gauge and soil pressure box are all electrically connected to the external computer through a data acquisition instrument.

[0007] The rolling stone is located in a support platform; a sliding control device is provided under the support platform; a pushing device is provided on the side of the rolling stone away from the guide rail;

[0008] The slide control device comprises a telescopic support frame located below the support platform and the guide rail; the guide rail and the box body are connected by a hinge;

[0009] The pushing device comprises a baffle and a jack which are sequentially arranged on a side away from the guide rail.

[0010] The side wall of the box is provided with holes for the pipeline to pass through, and the pipeline is arranged perpendicular to the extension direction of the box.

[0011] Wherein, the earth pressure boxes are buried at intervals along the depth direction of the soil layer.

[0012] The jack is also connected to an external computer.

[0013] The technical effects of the utility model are:

[0014] The utility model can study the pipeline mechanical response law under different stone rolling shapes, different soil parameters, different pipeline parameters, different rolling angles and different rolling speeds by adjusting the starting height of the stone rolling. The test device has high operability, good repeatability and easy operation. The research results are of great significance for ensuring the safety of pipelines under stone rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a test device for simulating the influence of rolling stone impact on buried pipelines.

[0016] Figure 2 It is a structural schematic diagram of the pushing device of the utility model.

[0017] Figure numerals: 1. support platform; 2. pushing device; 3. rolling stone; 4. guide rail; 5. hinge; 6. pipeline; 7. soil; 8. box; 9. telescopic support frame; 10. soil pressure box; 11. camera; 12. computer; 13. jack; 15. baffle. DETAILED DESCRIPTION

[0018] Example 1

[0019] A test device for simulating the impact of a rolling stone on an underground pipeline, comprising a rolling stone 3 set at a high place; a box 8 located on the ground; a guide rail 4 for the rolling stone 3 to fall is arranged between the rolling stone 3 and the pipeline 6; a soil body 7 is buried in the box 8, and a test pipeline 6 is buried in the soil body 7; a test device is also buried in the soil body 7; and an external computer 12 is also included; the test device is connected to the external computer 12.

[0020] The specific implementation process of this embodiment is as follows:

[0021] The utility model can study the mechanical response law of the pipeline 6 under different shapes of the rolling stones 3, different parameters of the soil 7, different parameters of the pipeline 6, different rolling angles and different rolling speeds by adjusting the starting height of the rolling stones 3.

[0022] Example 2

[0023] On the basis of Example 1, it also includes:

[0024] The testing device includes a strain gauge arranged on the pipeline 6, an earth pressure box 10 arranged in the soil 7, and a camera 11; the camera 11, the strain gauge and the earth pressure box 10 are all electrically connected to an external computer 12; the camera 11, the strain gauge and the earth pressure box 10 are all electrically connected to the external computer 12 through a data acquisition instrument; the strain gauge is used to measure the stress-strain response of the pipeline 6 under the rolling stone 3, the earth pressure box 10 is used to monitor the change of the earth pressure under the rolling stone 3, the camera 11 collects the change of the falling speed of the rolling stone 3, and the data of the camera 11, the strain gauge and the earth pressure box 10 are all transmitted to the external computer 12 through the data acquisition instrument for display.

[0025] Example 3

[0026] On the basis of Example 2, the invention further includes:

[0027] The rolling stone 3 is located in a support platform 1; a sliding control device is provided below the support platform 1; a pushing device 2 is provided on the side of the rolling stone 3 away from the guide rail 4;

[0028] The slide control device comprises a telescopic support frame 9 located below the support platform 1 and the guide rail 4; the guide rail 4 and the box 8 are connected by a hinge 5;

[0029] The pushing device 2 includes a baffle 15 and a jack 13 which are sequentially arranged on a side away from the guide rail 4 .

[0030] The rolling stone 3 is located in the support platform 1. By adjusting the connection relationship between the support platform 1 and the telescopic support frame 9 and the hinge 5 under the guide rail 4, the inclination angle of the guide rail 4 is changed to achieve control of different rolling angles; the pushing device 2 pushes the baffle 15 through the jack 13, thereby pushing the rolling stones 3 of different shapes to slide to the guide rail 4 to roll down, wherein the jack 13 pushes the baffle 15 to give the rolling stone 3 different initial speeds.

[0031] Example 4

[0032] On the basis of Example 3, the invention further includes:

[0033] The side wall of the box 8 is provided with a hole for the pipe 6 to pass through, and the pipe 6 is arranged perpendicular to the extension direction of the box 8; the box 8 is made of a steel plate, and holes are provided at designated positions on the side of the box 8 as needed for the pipe 6 to pass through, and the box 8 is reinforced with beams around to ensure that the soil 7 under the impact of the rolling stone 3 will not directly break through the side wall of the box 8;

[0034] The soil pressure boxes 10 are buried at intervals along the depth direction of the soil layer;

[0035] The jack 13 is also connected to the external computer 12 .

[0036] The specific implementation process of this embodiment is as follows:

[0037] Step 1: Before the test, check whether the equipment and materials used in the test are fully prepared and inspect their integrity to ensure that the monitoring equipment can be used normally;

[0038] Step 2: Build the test device described in the utility model according to the preset requirements, install the box 8 and the sliding control device, adjust the telescopic support frame 9 and the hinge 5, change the inclination angle of the guide rail 4, and realize the control of the specified rolling angle;

[0039] Step 3: evenly lay the soil 7 in layers in the box 8, and use a trowel to flatten and pat each layer of soil 7 after it is laid; lay the pipeline 6 after laying the soil 7 to the buried depth of the pipeline 6;

[0040] Step 4: Mark the arrangement position of the strain gauge on the pipeline 6 as required, polish the pipeline 6 and paste the strain gauge, after the strain gauge is pasted for protection, connect the strain gauge with the data acquisition instrument, debug the data acquisition instrument and the external computer 12 to check whether the line is unobstructed and whether the strain gauge can work normally;

[0041] Step 5: Continue to lay the soil 7 evenly. After each layer of soil 7 is laid, use a trowel to level it and pat it to make it dense. During the laying of the soil 7, install an earth pressure box 10 at a designated location to monitor the change of earth pressure in the soil 7. Connect the earth pressure box 10 to the data acquisition instrument, debug the data acquisition instrument and the external computer 12, and check whether the line is unobstructed and whether the earth pressure box 10 can work normally.

[0042] Step 6: Install the pushing device 2 above the support platform 1, load the rolling stone 3 of the specified shape into the pushing device 2, connect the jack 13 to the external computer 12, and check whether the line is unobstructed;

[0043] Step 7: Control the jack 13 through the external computer 12 to push the stone 3 to roll through the guide rail 4 and impact the filled soil 7. Monitor the speed change of the stone 3 during the rolling process, the soil pressure of the soil 7, and the stress and strain changes of the pipeline 6 through the external computer 12.

Claims

1. A test device for simulating the impact of a rolling stone on a buried pipeline, comprising a rolling stone (3) arranged at a high place; characterized in that: The invention also comprises a box (8) located on the ground; a guide rail (4) for the rolling stone (3) to fall is arranged between the rolling stone (3) and the pipe (6); a soil body (7) is buried in the box (8); a test pipe (6) is buried in the soil body (7); a test device is also buried in the soil body (7); an external computer (12) is also included; and the test device is connected to the external computer (12).

2. The test device for simulating the impact of rolling stones on buried pipelines according to claim 1, characterized in that: The testing device comprises a strain gauge arranged on a pipeline (6), an earth pressure box (10) arranged in a soil body (7), and a camera (11); the camera (11), the strain gauge and the earth pressure box (10) are all electrically connected to an external computer (12).

3. The test device for simulating the impact of rolling stones on buried pipelines according to claim 2, characterized in that: The camera (11), strain gauge and soil pressure box (10) are all electrically connected to an external computer (12) via a data acquisition device.

4. The test device for simulating the impact of rolling stones on buried pipelines according to claim 3, characterized in that: The rolling stone (3) is located in a support platform (1); a sliding control device is provided below the support platform (1); and a pushing device (2) is provided on the side of the rolling stone (3) facing away from the guide rail (4).

5. The test device for simulating the impact of rolling stones on buried pipelines according to claim 4, characterized in that: The slide control device comprises a telescopic support frame (9) located below the support platform (1) and the guide rail (4); the guide rail (4) and the box body (8) are connected via a hinge (5).

6. The test device for simulating the impact of rolling stones on buried pipelines according to claim 5, characterized in that: The pushing device (2) comprises a baffle (15) and a jack (13) which are sequentially arranged on a side away from the guide rail (4).

7. The test device for simulating the impact of rolling stones on buried pipelines according to claim 6, characterized in that: The side wall of the box body (8) is provided with a hole for the pipeline (6) to pass through, and the pipeline (6) is arranged perpendicular to the extension direction of the box body (8).

8. The test device for simulating the impact of rolling stones on buried pipelines according to claim 7, characterized in that: The soil pressure boxes (10) are buried at intervals along the depth direction of the soil layer.

9. The test device for simulating the impact of rolling stones on buried pipelines according to claim 8, characterized in that: The jack (13) is also connected to an external computer (12).

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