Special-shaped multi-taper joint high-pressure oil pipe oil pressure test method

Abstract

The invention discloses a special-shaped multi-taper joint high-pressure oil pipe oil pressure test method, which comprises the following steps of: firstly, selecting a corresponding taper replacement joint according to the shape of a workpiece, installing the taper replacement joint on the end head of one end of the workpiece, clamping the workpiece assembled with the taper replacement joint on a pressure test box, and testing the oil pressure of the special-shaped multi-taper joint high-pressure oil pipe. One end connected with the taper replacement joint faces the outside of the pressure test box, and then the taper replacement joint and the cylinder barrel oil pressure test bench are connected through the pressure test pipeline device. After the device is assembled, the pressure test box is closed, the cylinder barrel oil pressure test bed is started to add oil pressure to the workpiece, when the oil pressure rises to P and is kept for t, pressurization is stopped, pressure relief is started, and in the whole pressurization process, the situation that the test oil pressure of the oil pressure gauge of the cylinder barrel oil pressure test bed and the test oil pressure of the external oil pressure gauge change along with time is recorded. The oil pressure detection method is good in reliability, innovativeness and economical efficiency, and compared with a traditional test method, the pressure test safety and reliability are obviously improved, and the working efficiency is improved by more than three times.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure pipeline oil pressure testing, in particular to an oil pressure testing method for a high-pressure oil pipe with a special-shaped multi-taper joint. Background Art

[0002] The existing traditional high-pressure pipeline oil pressure test method uses cable ties to fix special-shaped pipelines with rigid positions on the ground. To ensure safety, personnel need to stay away from the test site during the test. When the same set of high-pressure oil pipes has different shapes and taper joints, the test area needs to be rearranged and different taper test extension tubes need to be replaced. In addition, since the pressure test device itself needs to frequently replace the extension tube, it is easy to cause the pressure test device itself to have a poor sealing effect, resulting in deviations in the test results, inaccuracies, and low safety. Summary of the invention

[0003] The purpose of the present invention is to provide a method for testing the oil pressure of a high-pressure oil pipe with a special-shaped multi-taper joint, comprising the following steps:

[0004] 1) Select the corresponding taper replacement joint according to the shape of the workpiece, and install the taper replacement joint on the end of the workpiece.

[0005] 2) Clamp the workpiece on the pressure test box through the pressure test limit block and fasteners, and make the end of the workpiece connected with the tapered replacement joint face outside the pressure test box.

[0006] 3) Connect the taper replacement joint and the cylinder oil pressure test bench through the pressure test pipeline device.

[0007] The pressure test pipeline device comprises a pressure test three-way device and an external oil pressure gauge installed on the pressure test three-way device.

[0008] 4) Close the pressure test box, start the cylinder oil pressure test bench to add oil pressure to the workpiece. When the oil pressure rises to P, after maintaining it for t time, stop pressurizing and start to release the pressure.

[0009] During the entire pressurization process, record the changes in the test oil pressure of the cylinder oil pressure test bench oil pressure gauge and the external oil pressure gauge over time.

[0010] 5) Close the cylinder oil pressure test bench, open the pressure test box, remove the workpiece and the taper replacement joint, and the oil pressure test is completed.

[0011] Furthermore, the pressure test pipeline device includes a unified quick-change joint, a tapered joint to replace the high-pressure pipe, a pressure test three-way device, a pressure test extension pipeline and an external oil pressure gauge.

[0012] The pressure test three-way device is respectively connected with the tapered joint replacement high-pressure pipe, the external oil pressure gauge and the pressure test extension pipeline.

[0013] The other end of the tapered joint replacing the high-pressure pipe is connected to the tapered replacement joint through a unified quick-change joint.

[0014] The other end of the pressure test extension pipeline is directly connected to the cylinder oil pressure test bench.

[0015] Furthermore, the workpiece is a special-shaped high-pressure oil pipe.

[0016] Furthermore, a mounting seat is fixed on the outer wall of the pressure test box, and the pressure test three-way device is fixed on the mounting seat.

[0017] Furthermore, in step 4), the oil pressure P is in the range of 0 to 40 MPa.

[0018] Further, in step 4), the time t ranges from 0 to 100 s.

[0019] Furthermore, in step 4), when the oil pressure difference between the oil pressure gauge of the cylinder oil pressure test bench and the external oil pressure gauge is greater than 0.05Mpa at the same time, there is oil leakage in the workpiece and pressurization needs to be stopped immediately.

[0020] The technical effect of the present invention is undoubted, and the beneficial effects of the present invention are as follows:

[0021] The invention has been successfully applied to the field of pipeline oil pressure detection technology, greatly improving the accuracy of pipeline oil pressure detection technology. The oil pressure detection method has good reliability, innovation and economy. Compared with traditional test methods, the safety and reliability of pressure testing are significantly improved, and the work efficiency is increased by more than 3 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a high-pressure oil pipe oil pressure test device with a special-shaped multi-taper joint;

[0023] Figure 2 This is an enlarged view of the pressure test pipeline device.

[0024] In the figure: 1-pressure test box; 2-pressure test limit block and fasteners; 3-pressure test pipeline device; 4-cylinder oil pressure test bench; 5-external oil pressure gauge; 6-pressure test extension pipeline; 7-pressure test three-way device; 8-tapered joint to replace high-pressure pipe; 9-various taper replacement joints; 10-unified quick-change joint; 11-workpiece. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0026] Embodiment 1:

[0027] A method for testing a high-pressure oil pipe with a special-shaped multi-taper joint comprises the following steps:

[0028] 1) Select a corresponding taper replacement joint 9 according to the shape of the workpiece 11, and install the taper replacement joint 9 on the end of the workpiece 11;

[0029] 2) Clamp the workpiece 11 on the pressure test box 1 through the pressure test limit block and the fastener 2, and make the end of the workpiece 11 connected with the tapered replacement joint 9 face the outside of the pressure test box 1;

[0030] 3) Connect the taper replacement joint 9 and the cylinder oil pressure test bench 4 through the pressure test pipeline device 3;

[0031] The pressure test pipeline device 3 includes a pressure test three-way device 7 and an external oil pressure gauge 5 installed on the pressure test three-way device 7;

[0032] 4) Close the pressure test box 1, start the cylinder oil pressure test bench 4 to add oil pressure to the workpiece 11, and when the oil pressure rises to P, after maintaining it for t time, stop pressurizing and start to release the pressure;

[0033] During the entire pressurization process, record the changes in the test oil pressure of the cylinder oil pressure test bench 4 oil pressure gauge and the external oil pressure gauge 5 over time;

[0034] 5) Close the cylinder oil pressure test bench 4, open the pressure test box 1, remove the workpiece 11 and the taper replacement joint 9, and complete an oil pressure test.

[0035] Embodiment 2:

[0036] The main structure of this embodiment is the same as that of Embodiment 1. Furthermore, the pressure test pipeline device 3 includes a unified quick-change connector 10, a tapered connector to replace the high-pressure pipe 8, a pressure test three-way device 7, a pressure test extension pipeline 6 and an external oil pressure gauge 5.

[0037] The pressure test three-way device 7 is connected to the tapered joint replacement high-pressure pipe 8, the external oil pressure gauge 5 and the pressure test extension pipeline 6 respectively.

[0038] The other end of the tapered joint replacement high-pressure pipe 8 is connected to the tapered replacement joint 9 through a unified quick-change joint 10 .

[0039] The other end of the pressure test extension pipeline 6 is directly connected to the cylinder oil pressure test bench 4 .

[0040] Embodiment 3:

[0041] The main structure of this embodiment is the same as any one of Embodiments 1 to 2. Furthermore, the workpiece 11 is a special-shaped high-pressure oil pipe.

[0042] Embodiment 4:

[0043] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Furthermore, a mounting seat is fixed on the outer wall of the pressure test box 1, and the pressure test three-way device 7 is fixed on the mounting seat.

[0044] Embodiment 5:

[0045] The main structure of this embodiment is the same as any one of embodiments 1 to 4. Further, in step 4), the oil pressure P ranges from 0 to 40 MPa.

[0046] Embodiment 6:

[0047] The main structure of this embodiment is the same as any one of Embodiments 1 to 5. Further, in step 4), the time t ranges from 0 to 100 s.

[0048] Embodiment 7:

[0049] The main structure of this embodiment is the same as any one of Embodiments 1 to 6. Furthermore, in step 4), when the oil pressure difference between the oil pressure gauge of the cylinder oil pressure test bench 4 and the external oil pressure gauge 5 is greater than 0.05Mpa at the same time, there is oil leakage in the workpiece 11, and pressurization must be stopped immediately to prevent the workpiece from bursting.

[0050] Embodiment 8:

[0051] The main structure of this embodiment is the same as any one of Embodiments 1 to 7. Furthermore, the limit blocks and fasteners are integrated and installed on a pressure test box made of excessively high-strength steel to ensure that the test can quickly fix the tested special-shaped high-pressure oil pipes and the safety of the test. The pressure test pipeline device ensures high-pressure testing of high-pressure oil pipes with different tapered joints by quickly replacing the tapered joints. At the same time, optimizing the processing process and other contents are the key to the present invention.

[0052] Embodiment 9:

[0053] The main structure of this embodiment is the same as any one of Embodiments 1 to 8. Furthermore, the process flow of the oil pressure test method of a high-pressure oil pipe with a special-shaped multi-taper joint is as follows:

[0054] Select the corresponding taper joint according to the workpiece and install it → clamp the workpiece → close the pressure test box → start the cylinder oil pressure test bench to pressurize the workpiece → maintain the pressure for the specified time as required by the test → record the change of the test oil pressure over time → release the pressure → close the cylinder oil pressure test bench → punch the pressure test box → remove the workpiece → remove the taper joint and put it in the specified position.

[0055] The specific process is:

[0056] The workpiece is pressed in the pressure test box by the pressure test limit block and the fastener 2 to achieve rapid fixation of the workpiece. Various taper replacement joints 9 are connected to the taper joint replacement high-pressure pipe 8 through a unified quick-change joint 10 to achieve rapid replacement of different taper joints to match different test workpieces. The external oil pressure gauge 5 is connected to the pressure test three-way device and compared with the pressure data of the cylinder oil pressure test bench 4 to ensure the reliability of the test device. During the entire test process, the workpiece is always located in the pressure test box 1 made of high-strength steel to ensure the safety of the test.

[0057] By adopting the process flow and test device described in this embodiment, the clamping and testing of the high-pressure oil pipe with a special-shaped multi-taper joint can be completed quickly, which improves the safety and accuracy of the test while reducing the size of the test site and reducing the workload of the operator, thereby improving the accuracy and efficiency of the test.

[0058] Embodiment 10:

[0059] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Furthermore, the present invention uses a pressure test box to ensure the safety of the oil pressure test, and uses a pressure test pipeline device in conjunction with a cylinder oil pressure test bench to meet the high-pressure test conditions of high-pressure oil pipes with different taper joints. The method has a simple structure and is easy to operate. Compared with the traditional pressure test method, this method does not require frequent adjustment of the pipeline layout. A variety of special-shaped pipelines can be fixed by the pressure test limit blocks and fasteners in the pressure test box. By replacing the tapered joint in the pressure test pipeline device, it is possible to quickly perform high-pressure tests on high-pressure oil pipes with different taper joints. And the influence of external factors on the tested pipeline by the pressure test device is eliminated by comparing the separate external oil pressure gauge of the pressure test pipeline device with the oil pressure gauge of the cylinder oil pressure test bench. The safety, efficiency and accuracy of the pressure test are significantly improved.

Claims

1. A method for testing the oil pressure of a high-pressure oil pipe with a special-shaped multi-taper joint, characterized in that: The following steps are involved: 1) selecting a corresponding taper replacement joint (9) according to the shape of the workpiece (11), and installing the taper replacement joint (9) on the end of the workpiece (11); 2) clamping the workpiece (11) on the pressure test box (1) by means of a pressure test limit block and a fastener (2), and making the end of the workpiece (11) connected with the tapered replacement joint (9) face the outside of the pressure test box (1); 3) Connecting the taper replacement joint (9) and the cylinder oil pressure test bench (4) via the pressure test pipeline device (3); The pressure test pipeline device (3) comprises a pressure test three-way device (7) and an external oil pressure gauge (5) installed on the pressure test three-way device (7); 4) Close the pressure test box (1), start the cylinder oil pressure test bench (4) to add oil pressure to the workpiece (11), and when the oil pressure rises to P, after maintaining it for t time, stop pressurizing and start to release the pressure; During the entire pressurization process, the changes in the test oil pressure of the oil pressure gauge of the cylinder oil pressure test bench (4) and the external oil pressure gauge (5) over time are recorded. 5) Close the cylinder oil pressure test bench (4), open the pressure test box (1), remove the workpiece (11) and the taper replacement joint (9), and the oil pressure test is completed.

2. The oil pressure test method for a high-pressure oil pipe with a special-shaped multi-taper joint according to claim 1 is characterized in that: The pressure test pipeline device (3) comprises a unified quick-change joint (10), a tapered joint replacing a high-pressure pipe (8), a pressure test three-way device (7), a pressure test extension pipeline (6) and an external oil pressure gauge (5). The pressure test three-way device (7) is respectively connected to the tapered joint replacement high-pressure pipe (8), the external oil pressure gauge (5) and the pressure test extension pipeline (6); The other end of the tapered joint replacement high-pressure pipe (8) is connected to the tapered replacement joint (9) via a unified quick-change joint (10); The other end of the pressure test extension pipeline (6) is directly connected to the cylinder oil pressure test bench (4).

3. The oil pressure test method for a high-pressure oil pipe with a special-shaped multi-taper joint according to claim 1 is characterized in that: The workpiece (11) is a special-shaped high-pressure oil pipe.

4. The oil pressure test method for a high-pressure oil pipe with a special-shaped multi-taper joint according to claim 1 is characterized in that: A mounting seat is fixed on the outer wall of the pressure test box (1), and the pressure test three-way device (7) is fixed on the mounting seat.

5. The oil pressure test method for a high-pressure oil pipe with a special-shaped multi-taper joint according to claim 1 is characterized in that: In step 4), the oil pressure P ranges from 0 to 40 MPa.

6. The oil pressure test method for a high-pressure oil pipe with a special-shaped multi-taper joint according to claim 1 is characterized in that: In step 4), the time t ranges from 0 to 100 s.

7. The oil pressure test method for a high-pressure oil pipe with a special-shaped multi-taper joint according to claim 1 is characterized in that: In step 4), when the oil pressure difference between the oil pressure gauge of the cylinder oil pressure test bench (4) and the external oil pressure gauge (5) is greater than 0.05Mpa at the same time, there is oil leakage in the workpiece (12), and pressurization needs to be stopped immediately.

Images