Pressure test and leakage test device for joint of oil and gas pipelines

Abstract

The utility model relates to a pressure test and leakage test device for a joint of oil and gas pipelines, and relates to the technical field of pipeline connection. The device comprises a clamping piece, the clamping piece comprises two semicircular clamps hinged to each other, connecting rods are arranged on the side walls of the two sides of each semicircular clamp, fixing blocks are arranged at the ends, away from the semicircular clamps, of the connecting rods, sliding holes are formed in the fixing blocks in the thickness direction, and pressing rods are slidably connected into the sliding holes. The pressing rod is arranged in the direction facing the outer wall of the pipeline, and an arc-shaped adsorption suction cup is arranged at the end, close to the pipeline, of the pressing rod. The device has the effects of improving the stability of the clamping piece when the clamping piece is installed on the outer wall of the pipeline and improving the accuracy of pressure test and leakage test.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline connection, and in particular to a pressure and leakage testing device for oil and gas pipeline connections. Background Art

[0002] Pressure testing and leak testing at pipeline joints are important links to ensure the safety, sealing and reliability of the pipeline system, and are indispensable steps in the pipeline installation process.

[0003] In the related art, a pressure test device for a pipe joint is designed, including a clamping piece, a fixing piece, a pressure gauge and an inflatable piece. The clamping piece includes two hinged semi-circular ring clamps. When the two semi-circular ring clamps are fitted together, a closed air cavity is formed between the two semi-circular ring clamps and the outer wall of the pipe. The fixing piece is installed on one of the semi-circular ring clamps, and the fixing piece is used to fix the semi-circular ring clamps. The pressure gauge is installed on the outer wall of one of the semi-circular ring clamps, and the pressure gauge is connected to the air cavity. The inflatable piece is installed on the other semi-circular ring clamp, and the inflatable piece is used to inflate the air cavity. When the pipe joint is pressure tested, the semi-circular ring clamp is installed at the pipe joint so that the joint of the pipe is aligned with the air cavity, and air is inflated into the air cavity through the inflatable piece until the pressure gauge reaches the rated pressure of the pipe. After waiting for a period of time, the pressure gauge is observed to see if there is a pressure drop. If there is a pressure drop, it indicates that there is a leakage problem at the pipe joint, otherwise there is no leakage.

[0004] With respect to the above-mentioned related technologies, there are the following problems: when the clamp is installed on the outer wall of the pipe, the clamp is prone to slide along the length direction of the pipe, which in turn causes the joint at the pipe connection and the air cavity to be misaligned. In this case, even if there is a leakage problem at the pipe connection, it is difficult for the pressure gauge to show a significant pressure drop, which affects the accuracy of the pressure test and leak test, and there is a safety hazard, so it needs to be improved. Utility Model Content

[0005] In order to improve the stability of the clamp when it is installed on the outer wall of the pipeline and improve the accuracy of pressure testing and leak testing, the present application provides a pressure testing and leak testing device for the connection of an oil and gas pipeline.

[0006] The present application provides a pressure and leak testing device for oil and gas pipeline connections using the following technical solutions:

[0007] A pressure and leak testing device for an oil and gas pipeline connection comprises a clamping piece, wherein the clamping piece comprises two mutually hinged semicircular ring clamps, each of the semicircular ring clamps is provided with a connecting rod on both side walls, and a fixing block is provided at one end of the connecting rod away from the semicircular ring clamp, wherein the fixing block is provided with a sliding hole along the thickness direction, a pressing rod is slidably connected in the sliding hole, the pressing rod is arranged in the direction of the outer wall of the pipeline, and an adsorption suction cup is provided at one end of the pressing rod close to the pipeline, wherein the adsorption suction cup is arc-shaped.

[0008] By adopting the above technical solution, after the clamping piece is fixed to the outer wall of the pipe, the connecting rod and the semicircular ring clamp are installed, and the pressing rod is slid so that the adsorption suction cup can abut against the outer wall of the pipe. As the pressing rod continues to move toward the pipe, the air in the adsorption suction cup is squeezed out, so that the adsorption suction cup can be adsorbed on the outer wall of the pipe, thereby improving the stability of the clamping piece, reducing the probability of the clamping piece sliding along the pipe, and improving the accuracy of the pressure test and leak test.

[0009] Optionally, mounting blocks are provided on the outer walls on both sides of the semicircular ring clamp, and the connecting rod is connected to the mounting blocks.

[0010] By adopting the above technical solution, the connecting rod is connected to the mounting block, and then the connecting rod and the semicircular ring clamp are separated to prevent the air cavity in the semicircular ring clamp from being damaged when the connecting rod is installed, thereby ensuring the sealing of the air cavity and improving the detection accuracy.

[0011] Optionally, the connecting rod includes a first rod and a second rod, the first rod and the second rod are rotatably connected, a threaded column is provided on the end wall of the first rod away from the second rod, a threaded hole for setting the threaded column is opened on the side wall of the mounting block, and the fixing block is connected to the end wall of the second rod away from the first rod.

[0012] By adopting the above technical solution, when installing the connecting rod, the threaded column is inserted into the threaded hole and the first rod is rotated to complete the fixation of the connecting rod and the mounting block. Since the first rod and the second rod are rotatably connected, it is possible to avoid the problem that the fixing block, the pressing rod and the adsorption suction cup on the second rod follow the rotation when installing the connecting rod, which may easily collide with the pipe, thereby improving the convenience of assembly.

[0013] Optionally, the pressing rod includes a third rod and a fourth rod, the third rod and the fourth rod are rotatably connected, the adsorption suction cup is connected to an end of the fourth rod away from the third rod, a limiting rod is provided on the surface of the third rod, a limiting groove is provided on the surface of the sliding hole for the limiting rod to pass through, a rotation groove is provided on the inner wall of the sliding hole, the rotation groove is provided along the circumferential direction of the inner wall of the sliding hole, and the rotation groove is connected to the limiting groove.

[0014] By adopting the above technical solution, during the sliding of the pressing rod, the limiting rod slides along the limiting groove at the same time. When the adsorption suction cup is fixed to the outer wall of the pipe, the limiting rod also comes to the connecting point between the translation groove and the limiting groove. By rotating the third rod, the limiting rod can be separated from the limiting groove and enter the translation groove. Under the abutment of the upper and lower inner walls of the translation groove, the limiting rod and the pressing rod as a whole can no longer slide, thereby maintaining the stability of the adsorption suction cup.

[0015] Optionally, a magnetic component is provided on the inner wall of the rotatable groove, and the magnetic component is magnetically attracted to the limiting rod.

[0016] By adopting the above technical solution, a magnetic part is provided to adsorb the limit rod, thereby ensuring that after the adsorption suction cup is adsorbed on the outer wall of the pipe, the limit rod can remain stable in the flat rotating groove to prevent the adsorption suction cup from loosening.

[0017] Optionally, a limiting plate is provided on the outer wall of the fourth rod member, and a reset groove is provided on the inner wall of the sliding hole for the limiting plate to be pressed into and slide, and a reset member is provided in the reset groove, and the reset member is pressed against the bottom wall of the limiting plate, and the reset member enables the limiting plate to maintain a movement trend away from the pipeline.

[0018] By adopting the above technical solution, the setting of the reset part and the limit plate can provide assistance for the separation of the adsorption suction cup and the pipeline when it is necessary to release the connection between the adsorption suction cup and the pipeline, so as to reduce the physical strength consumed when manually pulling the adsorption suction cup, and improve the convenience of disassembly of the adsorption suction cup.

[0019] Optionally, the reset member includes a guide rod and a reset spring, the guide rod is arranged in the reset groove, the guide rod is arranged parallel to the fourth rod, the guide rod passes through the reset plate, the reset spring is sleeved on the peripheral wall of the guide rod, and the reset spring abuts between the limiting plate and the bottom wall of the reset groove.

[0020] By adopting the above technical solution, when the adsorption suction cup is fixed to the outer wall of the pipe, the limiting plate slides along the guide rod, the reset spring is compressed, and elastic potential energy is accumulated. The third rod is rotated, and the limiting rod enters the flat rotating groove. At this time, the reset spring cannot be reset. When the connection between the adsorption suction cup and the pipe needs to be released, the third rod is reversed, and the limiting rod enters the limiting groove, losing the abutment against the upper inner wall of the flat rotating groove. The reset spring will release elastic potential energy to assist in the separation of the adsorption suction cup. The reset member of the present application has a simple structure and high practicality.

[0021] Optionally, a sealing gasket is provided on the inner wall of the semicircular ring clamp, and the sealing gasket abuts against the outer wall of the pipeline.

[0022] By adopting the above technical solution, the sealing gasket can, on the one hand, improve the sealing performance of the semi-circular ring clamp and reduce the probability of gas leakage; on the other hand, it can also provide friction between the semi-circular ring clamp and the pipeline to reduce the probability of the semi-circular ring clamp slipping.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] After the clamp is fixed to the outer wall of the pipe, the connecting rod and the semicircular ring clamp are installed, and the pressing rod is slid so that the adsorption cup can abut against the outer wall of the pipe. As the pressing rod continues to move toward the pipe, the air in the adsorption cup is squeezed out, so that the adsorption cup can be adsorbed on the outer wall of the pipe, thereby improving the stability of the clamp, reducing the probability of the clamp sliding along the pipe, and improving the accuracy of the pressure test and leak test;

[0025] On the one hand, the sealing gasket can improve the sealing performance of the semi-circular ring clamp and reduce the probability of gas leakage. On the other hand, it can also provide friction between the semi-circular ring clamp and the pipeline to reduce the probability of the semi-circular ring clamp slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a pressure and leak testing device at an oil and gas pipeline connection in an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of the connecting rod and the pressing rod in the embodiment of the present application.

[0028] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0029] Explanation of the accompanying drawings: 1. Clamping member; 11. Semicircular ring clamp; 12. Fixing member; 2. Connecting rod; 21. First rod; 211. Threaded column; 22. Second rod; 3. Fixing block; 31. Sliding hole; 32. Limiting groove; 33. Transverse groove; 34. Magnetic member; 35. Reset groove; 4. Pressing rod; 41. Third rod; 411. Limiting rod; 42. Fourth rod; 421. Limiting plate; 5. Adsorption cup; 6. Mounting block; 61. Threaded hole; 7. Reset member; 71. Guide rod; 72. Reset spring; 8. Sealing pad; 9. Pressure gauge; 10. Inflatable member. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The present application embodiment discloses a pressure and leak testing device for oil and gas pipeline connection. Figure 1, including a clamping member 1, the clamping member 1 includes two semi-circular ring clamps 11 hinged to each other, the two semi-circular ring clamps 11 are closed and sleeved on the pipe connection, and the two semi-circular ring clamps 11 are provided with fixing members 12 for locking the clamping member 1, and the inner wall of the semi-circular ring clamp 11 is provided with a sealing gasket 8 by gluing, and the sealing gasket 8 abuts against the outer wall of the pipe, on the one hand, the sealing performance of the clamping member 1 is improved, and on the other hand, the friction between the clamping member 1 and the pipe is improved to reduce the probability of the clamping member 1 slipping on the pipe; one of the semi-circular ring clamps 11 is connected to a barometer 9, and the other semi-circular ring clamp 11 is connected to an inflatable member 10.

[0032] Reference Figure 1 and Figure 2 The side walls on both sides of the semicircular ring clamp 11 are connected to the mounting blocks 6 by welding, and a connecting rod 2 is arranged on the mounting block 6. The connecting rod 2 is arranged parallel to the pipeline. The connecting rod 2 includes a first rod member 21 and a second rod member 22. The first rod member 21 and the second rod member 22 are in the same straight line, and the first rod member 21 and the second rod member 22 are rotatably connected by a ball joint. The end of the first rod member 21 facing the mounting block 6 is connected to a threaded column 211 by welding, and a threaded hole 61 for installing the threaded column 211 is opened on the side wall of the mounting block 6 to realize the quick connection of the connecting rod 2.

[0033] Reference Figure 2 and Figure 3 The second rod 22 is connected to a fixing block 3 at one end away from the first rod 21 by welding. The fixing block 3 is provided with a sliding hole 31 along the thickness direction. A pressing rod 4 is slidably connected in the sliding hole 31. The pressing rod 4 includes a third rod 41 and a fourth rod 42. The third rod 41 and the fourth rod 42 are rotatably connected by a ball joint. Two limiting rods 411 are connected to the peripheral wall of the third rod 41 by welding. The two limiting rods 411 are about the third rod 41. The axis is symmetrically arranged, and a limiting groove 32 is provided on the surface of the sliding hole 31 for the limiting rod 411 to be inserted and slided. A horizontal rotation groove 33 is provided on the inner wall of the sliding hole 31 along the circumferential direction. The horizontal rotation groove 33 is connected with the limiting groove 32. A magnetic part 34 is arranged in the horizontal rotation groove 33. In this embodiment, the magnetic part 34 is a magnet, and the limiting rod 411 is made of iron. The magnetic part 34 and the limiting rod 411 are magnetically attracted to each other, so as to fix the limiting rod 411 in the horizontal rotation groove 33.

[0034] Reference Figure 2The fourth rod 42 is located in the sliding hole 31. The peripheral wall is connected with two limiting plates 421 by welding. The inner wall of the sliding hole 31 is provided with a reset groove 35 for the limiting plate 421 to press into. A reset member 7 is arranged in the reset groove 35. The reset member 7 includes a guide rod 71 and a reset spring 72. The guide rod 71 is arranged along the depth direction of the reset groove 35. The guide rod 71 passes through the limiting plate 421 and is connected to the inner wall of the reset groove 35. The reset spring 72 is sleeved on the peripheral wall of the guide rod 71. The reset spring 72 abuts between the limiting plate 421 and the bottom wall of the reset groove 35. Under the action of the reset member 7, the reset plate always maintains a movement trend away from the pipeline.

[0035] Reference Figure 1 and Figure 2 One end of the fourth rod 42 extending out of the sliding hole 31 is provided with an adsorption suction cup 5, and the adsorption suction cup 5 is arc-shaped for fixing with the outer wall of the pipeline.

[0036] The implementation principle of a pressure and leak testing device at a connection of an oil and gas pipeline in an embodiment of the present application is as follows: the clamping member 1 is fixed to the outer wall of the pipeline, the connecting rod 2 is installed with the mounting block 6, and the pressing rod 4 is slid so that the adsorption suction cup 5 can abut against the outer wall of the pipeline. As the pressing rod 4 continues to move toward the pipeline, the air in the adsorption suction cup 5 is squeezed out, so that the adsorption suction cup 5 can be adsorbed on the outer wall of the pipeline, and the third rod 41 is rotated so that the limiting rod 411 enters the flat rotating groove 33 and is attracted to the magnetic member 34, thereby completing the fixing of the pressing rod 4, thereby improving the stability of the clamping member 1, thereby reducing the probability of the clamping member 1 sliding along the pipeline, and improving the accuracy of the pressure and leak testing.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure and leak testing device for oil and gas pipeline joints, comprising a clamping member (1), wherein the clamping member (1) comprises two semicircular ring clamps (11) hinged to each other, characterized in that: Each of the side walls of the semicircular ring clamp (11) is provided with a connecting rod (2), and a fixing block (3) is provided at one end of the connecting rod (2) away from the semicircular ring clamp (11). The fixing block (3) is provided with a sliding hole (31) along the thickness direction, and a pressing rod (4) is slidably connected in the sliding hole (31). The pressing rod (4) is arranged in the direction of the outer wall of the pipe, and an adsorption suction cup (5) is provided at one end of the pressing rod (4) close to the pipe, and the adsorption suction cup (5) is arc-shaped.

2. The oil and gas pipeline connection pressure and leak testing device according to claim 1, characterized in that: The outer walls on both sides of the semicircular ring clamp (11) are provided with mounting blocks (6), and the connecting rod (2) is connected to the mounting blocks (6).

3. The oil and gas pipeline connection pressure and leak testing device according to claim 2, characterized in that: The connecting rod (2) comprises a first rod (21) and a second rod (22), the first rod (21) and the second rod (22) being rotatably connected, a threaded column (211) being arranged on an end wall of the first rod (21) away from the second rod (22), a threaded hole (61) for the threaded column (211) being arranged on a side wall of the mounting block (6), and the fixing block (3) being connected to an end wall of the second rod (22) away from the first rod (21).

4. The oil and gas pipeline connection pressure and leak testing device according to claim 1, characterized in that: The pressing rod (4) comprises a third rod (41) and a fourth rod (42), the third rod (41) and the fourth rod (42) are rotatably connected, the adsorption cup (5) is connected to an end of the fourth rod (42) away from the third rod (41), a limiting rod (411) is arranged on the surface of the third rod (41), a limiting groove (32) for the limiting rod (411) to pass through is opened on the surface of the sliding hole (31), a translation groove (33) is opened on the inner wall of the sliding hole (31), the translation groove (33) is opened along the circumferential direction of the inner wall of the sliding hole (31), and the translation groove (33) is connected with the limiting groove (32).

5. The oil and gas pipeline connection pressure and leak testing device according to claim 4, characterized in that: The inner wall of the rotatable groove (33) is provided with a magnetic piece (34), and the magnetic piece (34) is magnetically attracted to the limiting rod (411).

6. The oil and gas pipeline connection pressure and leak testing device according to claim 4, characterized in that: The outer wall of the fourth rod (42) is provided with a limit plate (421), the inner wall of the sliding hole (31) is provided with a reset groove (35) for the limit plate (421) to press into and slide, and a reset member (7) is provided in the reset groove (35), the reset member (7) presses against the bottom wall of the limit plate (421), and the reset member (7) enables the limit plate (421) to maintain a movement tendency in a direction away from the pipeline.

7. The oil and gas pipeline connection pressure and leak testing device according to claim 6, characterized in that: The reset member (7) comprises a guide rod (71) and a reset spring (72); the guide rod (71) is arranged in the reset groove (35); the guide rod (71) is arranged parallel to the fourth rod (42); the guide rod (71) passes through the reset plate; the reset spring (72) is sleeved on the peripheral wall of the guide rod (71); the reset spring (72) abuts between the limiting plate (421) and the bottom wall of the reset groove (35).

8. The oil and gas pipeline connection pressure and leak testing device according to claim 1, characterized in that: The inner wall of the semicircular ring clamp (11) is provided with a sealing gasket (8), and the sealing gasket (8) abuts against the outer wall of the pipeline.

Images