Petroleum wellhead pipeline valve sealing performance detection device

Abstract

The utility model discloses a petroleum wellhead pipeline valve leakproofness detection device, which relates to the leakproofness detection technology field, and comprises a valve main body and a mounting ring, the mounting ring abuts against one side of a flange of the valve main body, and one side of the mounting ring close to the valve main body is fixedly provided with two insertion rods. The two inserting rods are inserted into flange holes of the valve body, limiting mechanisms are arranged on the upper side and the lower side of the mounting ring, the mounting ring is connected with a flange of the valve body in a limiting mode through the limiting mechanisms, an air pressure sensor is arranged in the middle of the mounting ring, and the air pressure sensor is fixedly connected with the inner wall of the mounting ring through a plurality of connecting rods. A fixing shell is fixedly arranged on the side, away from the valve body, of the mounting ring, a piston is slidably arranged in the fixing shell, and an air outlet is formed in the side, close to the mounting ring, of the fixing shell. The valve sealing detection device can be quickly connected with the valve, can perform stable sealing detection on the valve, is convenient to operate, and saves time and labor.

Description

Technical Field

[0001] This utility model relates to the field of sealing performance testing technology, specifically to a sealing performance testing device for oil wellhead pipeline valves. Background Technology

[0002] In the process of oil extraction, the sealing performance of wellhead pipeline valves is crucial. Poor valve sealing performance may lead to oil leaks, which not only waste resources but may also cause safety accidents and serious environmental pollution.

[0003] Currently, existing valve sealing testing devices are cumbersome to operate when connected to valves, the connection process is time-consuming, and it is difficult to ensure the stability of the connection. Loosening of the connection is prone to occur during the testing process, which affects the accuracy of the test results. In addition, some testing devices require a lot of manpower and complicated steps to operate, resulting in low testing efficiency and failing to meet the needs of rapid and accurate testing at oil extraction sites. Utility Model Content

[0004] In view of the problems existing in the above-mentioned oil wellhead pipeline valve sealing detection device, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a device for testing the sealing performance of oil wellhead pipeline valves, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing performance testing device for an oil wellhead pipeline valve includes a valve body and an mounting ring. The mounting ring is abutted against the flange side of the valve body. Two insert rods are fixedly mounted on the side of the mounting ring closest to the valve body, and the two insert rods are inserted into the flange holes of the valve body. Limiting mechanisms are provided on both the upper and lower sides of the mounting ring, and the mounting ring is limited to the flange of the valve body through the limiting mechanisms. A pressure sensor is provided in the middle of the mounting ring, and the pressure sensor is fixedly connected to the inner wall of the mounting ring through multiple connecting rods. A fixed shell is fixedly mounted on the side of the mounting ring away from the valve body, and a piston is slidably mounted inside the fixed shell. An air outlet is opened on the side of the fixed shell closest to the mounting ring. A threaded rod is fixedly mounted on the side of the piston away from the mounting ring. A first through hole is opened in the middle of the side of the fixed shell away from the mounting ring, and one end of the threaded rod extends to the outside of the first through hole. A transmission mechanism for moving the threaded rod is provided on the outer wall of the side of the fixed shell away from the mounting ring.

[0008] Preferably, the limiting mechanism includes an L-shaped plate and a limiting shell. The two L-shaped plates are abutted on both sides of the flange of the valve body. One end of the L-shaped plate abuts against the side of the flange of the valve body away from the mounting ring. The two limiting shells are fixedly disposed on the outer walls of both sides of the mounting ring. A movable shell is slidably disposed inside the limiting shell. A slide rod is fixedly disposed on one side of the movable shell. One end of the slide rod extends to the outside of the limiting shell and is fixedly connected to the L-shaped plate. A slider is slidably disposed inside the movable shell. A stop rod is fixedly disposed on one side of the slider. One end of the stop rod extends to the outside of the movable shell. An insertion hole is opened on one side of the limiting shell. One outer end of the stop rod is inserted into the insertion hole. A spring is fixedly disposed on the side of the slider away from the stop rod. The other end of the spring is fixedly connected to the inner wall of the movable shell.

[0009] Preferably, the transmission mechanism includes a first bevel gear and a second bevel gear. An internally threaded tube is threaded onto one end of the threaded rod. One end of the internally threaded tube is rotatably connected to the outer wall of the fixed shell. The first bevel gear is fixedly sleeved onto the outer wall of the internally threaded tube. A horizontal plate is fixedly installed on the outer wall of the fixed shell above the internally threaded tube. A transmission rod is rotatably installed on the lower surface of the horizontal plate. The second bevel gear is fixedly sleeved onto the lower end of the transmission rod. The first bevel gear and the second bevel gear are meshed together. A motor is fixedly installed on the upper surface of the horizontal plate. The output end of the motor is fixedly connected to one end of the transmission rod.

[0010] Preferably, both the movable shell and the limiting shell have rectangular cross-sections.

[0011] Preferably, a limiting rod is fixedly provided on one side of the interior of the movable shell, and one side of the slider is movably sleeved with the limiting rod.

[0012] Preferably, the outer wall of the fixed shell is provided with a second through hole on both sides of the first through hole, and a crossbar is movably inserted inside the second through hole, one end of the crossbar being fixedly connected to the piston.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. This utility model, through the insertion and engagement of the rod on the mounting ring with the flange hole of the valve body, and the synergistic effect of the L-shaped plate, limiting shell, and movable shell in the limiting mechanism, can achieve rapid connection between the detection device and the valve. Compared with traditional detection devices, it eliminates the need for complicated installation steps, greatly shortens the connection time, and improves detection efficiency. At the same time, this connection method has strong stability and effectively avoids the problem of affecting the accuracy of detection results due to loose connection during the detection process.

[0015] 2. This utility model uses a transmission mechanism driven by a motor to move a threaded rod, thereby controlling the movement of a piston to pressurize the outside of the valve. At the same time, a pressure sensor monitors the pressure in real time and determines whether the pressurized air has passed through the valve, thus achieving efficient sealing detection of the valve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the structure of an oil wellhead pipeline valve sealing performance testing device proposed in this utility model;

[0018] Figure 2 for Figure 1 Internal structure diagram;

[0019] Figure 3 This is a perspective view of the limiting mechanism in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Valve body; 2. Mounting ring; 3. Insert rod; 4. Fixed shell; 5. Limiting shell; 6. L-shaped plate; 7. Piston; 8. Pressure sensor; 9. Connecting rod; 10. Threaded rod; 11. Crossbar; 12. Internally threaded pipe; 13. First bevel gear; 14. Cross plate; 15. Transmission rod; 16. Second bevel gear; 17. Motor; 18. Movable shell; 19. Slide rod; 20. Slider; 21. Stop bar; 22. Limiting rod; 23. Spring. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model discloses a device for testing the sealing performance of oil wellhead pipeline valves.

[0024] Reference Figure 1-3A sealing performance testing device for an oil wellhead pipeline valve includes a valve body 1 and an mounting ring 2. The mounting ring 2 is abutted against the flange side of the valve body 1. Two insert rods 3 are fixedly installed on the side of the mounting ring 2 closest to the valve body 1 and are inserted into the flange holes of the valve body 1. A pressure sensor 8 is installed in the middle of the mounting ring 2 and is fixedly connected to the inner wall of the mounting ring 2 through multiple connecting rods 9. A fixing shell 4 is fixedly installed on the side of the mounting ring 2 away from the valve body 1. A piston 7 is slidably installed inside the fixing shell 4. An air outlet is opened on the side of the fixing shell 4 closest to the mounting ring 2. A threaded rod 10 is fixedly installed on the side of the piston 7 away from the mounting ring 2. A first through hole is opened in the middle of the side of the fixing shell 4 away from the mounting ring 2, and one end of the threaded rod 10 extends to the outside of the first through hole.

[0025] Reference Figure 1-3 The mounting ring 2 is equipped with limiting mechanisms on both its upper and lower sides. The mounting ring 2 is connected to the flange of the valve body 1 via these limiting mechanisms. The limiting mechanisms include L-shaped plates 6 and limiting shells 5. Two L-shaped plates 6 are abutted against each other on both sides of the flange of the valve body 1. One end of each L-shaped plate 6 abuts against the side of the flange of the valve body 1 furthest from the mounting ring 2. Two limiting shells 5 are fixedly installed on the outer walls of both sides of the mounting ring 2. A movable shell 18 is slidably installed inside the limiting shell 5. A sliding rod 19 is fixedly installed on one side of the movable shell 18. One end of the sliding rod 19 extends outward from the limiting shell 5 and is fixedly connected to the L-shaped plates 6. A sliding mechanism is slidably installed inside the movable shell 18. The slider 20 has a stop bar 21 fixedly installed on one side, with one end of the stop bar 21 extending to the outside of the movable shell 18. The limiting shell 5 has an insertion hole on one side, and the outer end of the stop bar 21 is inserted into the insertion hole. The slider 20 has a spring 23 fixedly installed on the side away from the stop bar 21, and the other end of the spring 23 is fixedly connected to the inner wall of the movable shell 18. The movable shell 18 and the limiting shell 5 have rectangular cross-sections, which prevents the movable shell 18 from rotating, thus enabling stable sliding. A limiting rod 22 is fixedly installed on one side of the interior of the movable shell 18, and one side of the slider 20 is movably sleeved with the limiting rod 22, allowing the slider 20 to slide stably.

[0026] Reference Figure 1-3A transmission mechanism for moving the threaded rod 10 is provided on the outer wall of the fixed shell 4 away from the mounting ring 2. The transmission mechanism includes a first bevel gear 13 and a second bevel gear 16. An internal threaded tube 12 is threadedly sleeved on one end of the outer side of the threaded rod 10. One end of the internal threaded tube 12 is rotatably connected to the outer wall of the fixed shell 4. The first bevel gear 13 is fixedly sleeved on the outer wall of the internal threaded tube 12. A horizontal plate 14 is fixedly provided on the outer wall of the fixed shell 4 above the internal threaded tube 12. A transmission rod 15 is rotatably provided on the lower surface of the horizontal plate 14. The second bevel gear 16 is fixedly sleeved on the lower end of the transmission rod 15. The first bevel gear 13 and the second bevel gear 16 are meshed. A motor 17 is fixedly provided on the upper surface of the horizontal plate 14. The output end of the motor 17 is fixedly connected to one end of the transmission rod 15. A second through hole is provided on both sides of the first through hole on the outer wall of the fixed shell 4. A horizontal rod 11 is movably inserted through the second through hole. One end of the horizontal rod 11 is fixedly connected to the piston 7, so that the threaded rod 10 can move stably.

[0027] In this utility model, during use, firstly, the mounting ring 2 is brought close to the valve body 1, and the insertion rod 3 is aligned with the hole on the flange of the valve body 1 and inserted to initially fix the mounting ring 2. Next, the stop rod 21 is pushed towards the mounting ring 2. At this time, the slider 20 slides in the movable shell 18 and compresses the spring 23, and the stop rod 21 disengages from the insertion hole on the limiting shell 5. Then, the L-shaped plate 6 is pushed, causing the slide rod 19 to drive the movable shell 18 to slide in the limiting shell 5. One end of the L-shaped plate 6 is moved to the side of the flange of the valve body 1 away from the mounting ring 2, and the stop rod 21 is released. Under the elastic force of the spring 23, the slider 20 drives the stop rod 21 to reset and insert it into the insertion hole of the limiting shell 5, completing the limiting connection between the mounting ring 2 and the valve body 1. After the connection is completed, the motor 17 is started. The output end of the motor 17 drives the transmission rod 15 to rotate, and the second bevel gear 16 at the lower end of the transmission rod 15 rotates accordingly. The first bevel gear 13 meshes with the second bevel gear 16. The piston 7 also begins to rotate, which in turn drives the internal threaded tube 12 to rotate. Since the threaded rod 10 is threadedly connected to the internal threaded tube 12, the rotation of the internal threaded tube 12 causes the threaded rod 10 to move along the first through hole of the fixed shell 4. The threaded rod 10 pushes the piston 7 to slide inside the fixed shell 4. When the piston 7 slides, it changes the air pressure inside the valve body 1 through the air outlet on the side of the fixed shell 4 near the mounting ring 2. During this process, the air pressure sensor 8 monitors the air pressure change inside the valve body 1 in real time and transmits the data to the subsequent connected processing equipment (such as a display screen, if there is a relevant configuration). If the valve body 1 is well sealed, the air pressure change should be within the normal range; if the valve has a leak, the air pressure will drop abnormally. The operator can judge the sealing performance of the valve by observing the data fed back by the air pressure sensor. After the test is completed, the motor 17 is started in reverse to reset the piston 7. Then, the test device can be disassembled in the reverse order of the installation.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for testing the sealing performance of an oil wellhead pipeline valve, comprising a valve body (1) and an mounting ring (2), characterized in that, The mounting ring (2) is abutted against the flange side of the valve body (1). Two insert rods (3) are fixedly installed on the side of the mounting ring (2) near the valve body (1). The two insert rods (3) are inserted into the flange holes of the valve body (1). Limiting mechanisms are provided on both the upper and lower sides of the mounting ring (2). The mounting ring (2) is limited to the flange of the valve body (1) through the limiting mechanisms. A pressure sensor (8) is provided in the middle of the mounting ring (2). The pressure sensor (8) is fixedly connected to the inner wall of the mounting ring (2) through multiple connecting rods (9). (2) A fixed shell (4) is fixedly installed on the side away from the valve body (1). A piston (7) is slidably installed inside the fixed shell (4). An air outlet is opened on the side of the fixed shell (4) near the mounting ring (2). A threaded rod (10) is fixedly installed on the side of the piston (7) away from the mounting ring (2). A first through hole is opened in the middle of the side of the fixed shell (4) away from the mounting ring (2). One end of the threaded rod (10) extends to the outside of the first through hole. A transmission mechanism for driving the threaded rod (10) to move is provided on the outer wall of the side of the fixed shell (4) away from the mounting ring (2).

2. The oil wellhead pipeline valve sealing performance testing device according to claim 1, characterized in that, The limiting mechanism includes an L-shaped plate (6) and a limiting shell (5). The two L-shaped plates (6) are abutted against each other on both sides of the flange of the valve body (1). One end of the L-shaped plate (6) abuts against the side of the flange of the valve body (1) away from the mounting ring (2). The two limiting shells (5) are fixedly disposed on the outer walls of both sides of the mounting ring (2). A movable shell (18) is slidably disposed inside the limiting shell (5). A slide rod (19) is fixedly disposed on one side of the movable shell (18). One end of the slide rod (19) extends from the limiting shell (5). The outer side is fixedly connected to the L-shaped plate (6). The movable shell (18) is slidably provided with a slider (20). A stop bar (21) is fixedly provided on one side of the slider (20). One end of the stop bar (21) extends to the outer side of the movable shell (18). An insertion hole is provided on one side of the limiting shell (5). One end of the stop bar (21) is inserted into the insertion hole. A spring (23) is fixedly provided on the side of the slider (20) away from the stop bar (21). The other end of the spring (23) is fixedly connected to the inner wall of the movable shell (18).

3. The oil wellhead pipeline valve sealing performance testing device according to claim 1, characterized in that, The transmission mechanism includes a first bevel gear (13) and a second bevel gear (16). One end of the threaded rod (10) is threaded with an internal threaded tube (12). One end of the internal threaded tube (12) is rotatably connected to the outer wall of the fixed shell (4). The first bevel gear (13) is fixedly sleeved on the outer wall of the internal threaded tube (12). A horizontal plate (14) is fixedly installed on the outer wall of the fixed shell (4) and above the internal threaded tube (12). A transmission rod (15) is rotatably installed on the lower surface of the horizontal plate (14). The second bevel gear (16) is fixedly sleeved on the lower end of the transmission rod (15). The first bevel gear (13) and the second bevel gear (16) are meshed. A motor (17) is fixedly installed on the upper surface of the horizontal plate (14). The output end of the motor (17) is fixedly connected to one end of the transmission rod (15).

4. The oil wellhead pipeline valve sealing performance testing device according to claim 2, characterized in that, Both the movable shell (18) and the limiting shell (5) have rectangular cross-sections.

5. The oil wellhead pipeline valve sealing performance testing device according to claim 2, characterized in that, A limiting rod (22) is fixedly installed on one side of the interior of the movable shell (18), and one side of the slider (20) is movably connected to the limiting rod (22).

6. The oil wellhead pipeline valve sealing performance testing device according to claim 1, characterized in that, The outer wall of the fixed shell (4) is provided with a second through hole on both sides of the first through hole. A crossbar (11) is movably inserted inside the second through hole. One end of the crossbar (11) is fixedly connected to the piston (7).

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