Off-line inspection device for inner leakage of pneumatic butterfly valve

Abstract

The utility model relates to the technical field of pneumatic butterfly valve detection, and discloses a pneumatic butterfly valve inner leakage off-line detection device which comprises a detection table, fixing plates are vertically arranged on the two sides of the upper surface of the detection table, and plugging blocks penetrate through the middle portions of the fixing plates and are fixedly installed on the middle portions of the fixing plates. The clamping and fixing mechanism is used for fixing the connecting end of the pneumatic butterfly valve, the clamping and fixing mechanism comprises a lead screw and a servo motor, and sliding grooves are horizontally and symmetrically formed in the two sides of the detection table. According to the utility model, the servo motor is controlled to work, and the two groups of fixing plates can be driven to move oppositely or reversely on the upper surface of the detection table through the combination of the screw rod, the sliding block and the connecting block, so that the two groups of blocking blocks are pushed to seal and fix the connecting end of the pneumatic butterfly valve, and one end of the pneumatic butterfly valve can be inflated through the inflating pump and the inflating pipe. Air pressure at one end of the pneumatic butterfly valve can be detected through the air pressure sensor, data are transmitted to the industrial control computer, and workers can conveniently and accurately detect the inner leakage condition of the pneumatic butterfly valve.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic butterfly valve detection, in particular to an off-line detection device for internal leakage of a pneumatic butterfly valve. Background Art

[0002] The dynamic butterfly valve has a simple structure, small size, light weight, and is composed of only a few parts. Its operating principle is to use compressed air as the power source to drive the valve stem to control the disc-shaped butterfly plate to rotate around the axis. It can be quickly opened and closed by rotating 90°. It is easy to operate. At the same time, the valve has good fluid control characteristics and is widely used in general industries such as petroleum, gas, chemical industry, and water treatment.

[0003] The inventors have discovered that there are at least the following problems that have not been solved in the prior art: during high-load use of the valve, the wear of the valve core and valve plate can easily cause internal leakage of the valve. The internal leakage of the valve causes instability in the production equipment and even causes the equipment to fail to operate normally. The damaged valve needs to be replaced, but when replacing the valve, it is impossible to accurately determine which specific valve is damaged from the appearance of the valve core and valve plate, thereby increasing the difficulty of equipment maintenance.

[0004] Therefore, we propose an offline inspection device for internal leakage of pneumatic butterfly valves, which can solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an off-line internal leakage detection device for a pneumatic butterfly valve, which solves the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an off-line inspection device for internal leakage of a pneumatic butterfly valve, comprising a test platform, fixed plates are vertically arranged on both sides of the upper surface of the test platform, and a blocking block is passed through and fixedly installed on the middle of the fixed plate; a clamping mechanism: used for fixing the connecting end of the pneumatic butterfly valve, the clamping mechanism comprises a screw and a servo motor, horizontally symmetrical grooves are provided inside the two sides of the test platform, a slider is slidably connected inside the slide groove, connecting blocks are symmetrically installed on the front and rear sides of the upper surface of the slider, the slider is fixedly connected to the bottom side of the fixed plate through two groups of connecting blocks, and the screw rod passes through horizontally The middle part of the slider is threadedly connected to the slider, the shaft end of the servo motor is fixedly connected to one end of the screw rod, and the servo motor is fixedly connected to the middle part of one side of the detection platform; the detection mechanism: used to detect the internal leakage of the pneumatic butterfly valve, the detection mechanism includes an air pressure sensor, the lower end of the fixed plate on the right is horizontally fixedly installed with a carrier plate, the upper surface of the carrier plate is fixedly connected to an air pump, the air outlet end of the air pump is connected to an air inflation pipe, the air outlet end of the air inflation pipe passes through the middle part of the block on the right and is fixedly connected to the block, the air pressure sensor is fixedly connected to the inner wall of the air inflation pipe, and a through opening is opened through the middle part of the block on the left.

[0007] As an optional solution of the technical solution of the present application, a one-way valve is provided inside the inflation tube, and the one-way valve is placed between the air pressure sensor and the air inlet end of the inflation tube.

[0008] As an optional solution of the technical solution of the present application, a sealing gasket is bonded to the inner side of the fixing plate, and the sealing gasket is placed on the outer side of the blocking block.

[0009] As an optional solution of the technical solution of the present application, the threads on both sides of the screw have opposite rotation directions, and the screw is rotatably connected to the detection platform through a bearing.

[0010] As an optional solution of the technical solution of the present application, an industrial control computer is fixedly connected to the front side of the detection platform, and the data output end of the air pressure sensor is connected to the data input end of the industrial control computer.

[0011] As an optional solution of the technical solution of the present application, connecting grooves are horizontally opened on the front and rear sides of the inner wall at the top of the slide, and the two groups of connecting blocks at the top of the slider are respectively slidably connected to the two groups of connecting grooves at the top of the slide.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: by controlling the operation of the servo motor, the combination of the screw rod, the slider and the connecting block can drive the two sets of fixed plates to move relative or reversely on the upper surface of the test table, thereby pushing the two sets of blocking blocks to seal and fix the connecting end of the pneumatic butterfly valve; the air can be inflated into one end of the pneumatic butterfly valve through the air pump and the air pipe; the air pressure at one end of the pneumatic butterfly valve can be detected through the air pressure sensor and the data can be transmitted to the industrial control computer, which is convenient for the staff to accurately detect the internal leakage of the pneumatic butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a schematic diagram of the structure of an off-line internal leakage inspection device for a pneumatic butterfly valve according to the present invention;

[0015] Figure 2 This is a front view of an offline internal leakage inspection device for a pneumatic butterfly valve according to the utility model.

[0016] In the figure: 1. Testing table; 11. Fixing plate; 12. Block; 13. Slide; 14. Slider; 15. Connecting block; 16. Screw rod; 17. Servo motor; 18. Connecting groove; 2. Carrier plate; 21. Air pump; 22. Air tube; 23. Air pressure sensor; 24. One-way valve; 25. Industrial computer; 26. Sealing gasket; 27. Port. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 2 The utility model provides a technical solution: an off-line inspection device for internal leakage of a pneumatic butterfly valve, comprising a test platform 1, fixed plates 11 are vertically arranged on both sides of the upper surface of the test platform 1, and a blocking block 12 is passed through and fixedly installed in the middle of the fixed plate 11; a clamping mechanism: used to fix the connection end of the pneumatic butterfly valve, the clamping mechanism includes a screw rod 16 and a servo motor 17, and a horizontal symmetrical groove 13 is opened inside the two sides of the test platform 1, and a slider 14 is slidably connected to the inside of the slide groove 13, and a connecting block 15 is symmetrically installed on the front and rear sides of the upper surface of the slider 14. The slider 14 is connected to the upper surface of the slider 14 by two connecting blocks. The group connecting block 15 is fixedly connected to the bottom side of the fixed plate 11, and connecting grooves 18 are horizontally penetrated on the front and rear sides of the inner wall of the top of the slide 13. The two groups of connecting blocks 15 at the top of the slider 14 are respectively slidably connected to the two groups of connecting grooves 18 at the top of the slide 13. The screw rod 16 horizontally penetrates the middle of the slider 14 and is threadedly connected to the slider 14. The shaft end of the servo motor 17 is fixedly connected to one end of the screw rod 16. The threads on both sides of the screw rod 16 rotate in opposite directions. The screw rod 16 is rotatably connected to the detection platform 1 through a bearing, and the servo motor 17 is fixedly connected to the middle of one side of the detection platform 1.

[0018] In this technical solution, the servo motor 17 is controlled by the industrial control computer 25 to drive the screw rod 16 to rotate. The threads on both sides of the screw rod 16 rotate in opposite directions. During the rotation of the screw rod 16, the two sets of sliders 14 can be driven to move relative to or in reverse directions in the slide groove 13. The two sets of fixed plates 11 can be driven to move relative to or in reverse directions on the upper surface of the test platform 1 through the connecting block 15, thereby pushing the two sets of blocking blocks 12 to fix the connecting end of the pneumatic butterfly valve.

[0019] In this embodiment, the detection mechanism is used to detect internal leakage of the pneumatic butterfly valve. The detection mechanism includes an air pressure sensor 23. A carrier plate 2 is fixedly installed horizontally on the lower end of the right fixed plate 11. The upper surface of the carrier plate 2 is fixedly connected to an air pump 21. The air outlet end of the air pump 21 is connected to an air inflation pipe 22. The air outlet end of the air inflation pipe 22 passes through the middle of the right block 12 and is fixedly connected to the block 12. The air pressure sensor 23 is fixedly connected to the inner wall of the air inflation pipe 22. The front side of the detection platform 1 is fixedly connected to an industrial control computer 25. The data output end of the air pressure sensor 23 is connected to the data input end of the industrial control computer 25. A through opening 27 is opened through the middle of the left block 12.

[0020] In this technical solution, a through-hole 27 is opened through the middle of the left block 12, so that one end of the pneumatic butterfly valve is opened, and the right block 12 can block the other end of the pneumatic butterfly valve. The air pump 21 is controlled by the industrial control computer 25, and air can be inflated to the other end of the pneumatic butterfly valve through the inflation pipe 22. The air pressure at the inflation end of the pneumatic butterfly valve can be detected by the air pressure sensor 23 and the data can be transmitted to the industrial control computer 25. When the air pressure at the inflation end of the pneumatic butterfly valve reaches the threshold, the industrial control computer 25 can control the air pump 21 to close. After a specified time, the air pressure changes inside the inflation end of the pneumatic butterfly valve are observed. When the air pressure inside the inflation end of the pneumatic butterfly valve decreases, it indicates that there is an internal leakage in the pneumatic butterfly valve.

[0021] In this embodiment, a one-way valve 24 is provided inside the inflation tube 22, and the one-way valve 24 is placed between the air pressure sensor 23 and the air inlet end of the inflation tube 22. A sealing gasket 26 is bonded to the inner side of the fixing plate 11, and the sealing gasket 26 is placed on the outer side of the blocking block 12.

[0022] In this technical solution, a one-way valve 24 is provided inside the inflation tube 22 to control the flow direction of the air inside the inflation tube 22 and avoid the backflow of gas at the inflation end of the pneumatic butterfly valve. A sealing gasket 26 is bonded to the inner side of the fixed plate 11 to improve the sealing effect of the fixed plate 11 and the blocking block 12 on the connection end of the pneumatic butterfly valve.

[0023] When an off-line inspection device for internal leakage of a pneumatic butterfly valve is used, the servo motor 17 is controlled by the industrial control computer 25 to work, which can drive the screw rod 16 to rotate. The threads on both sides of the screw rod 16 rotate in opposite directions. During the rotation of the screw rod 16, the two sets of sliders 14 can be driven to move relative to or in opposite directions in the slide groove 13. The two sets of fixing plates 11 can be driven to move relative to or in opposite directions on the upper surface of the inspection table 1 through the connecting block 15, thereby pushing the two sets of blocking blocks 12 to fix the connecting end of the pneumatic butterfly valve. A through hole 27 is opened in the middle of the blocking block 12 on the left side, so that one end of the pneumatic butterfly valve can be fixed. The end is open, and the blocking block 12 on the right can block the other end of the pneumatic butterfly valve. The air pump 21 is controlled by the industrial control computer 25 to inflate the other end of the pneumatic butterfly valve through the inflation pipe 22. The air pressure at the inflation end of the pneumatic butterfly valve can be detected by the air pressure sensor 23 and the data is transmitted to the industrial control computer 25. When the air pressure at the inflation end of the pneumatic butterfly valve reaches the threshold, the industrial control computer 25 can control the air pump 21 to be closed. After a specified time, the air pressure change inside the inflation end of the pneumatic butterfly valve is observed. When the air pressure inside the inflation end of the pneumatic butterfly valve decreases, it indicates that there is an internal leakage in the pneumatic butterfly valve.

Claims

1. An off-line inspection device for internal leakage of a pneumatic butterfly valve, comprising a detection table (1), characterized in that: Fixed plates (11) are vertically arranged on both sides of the upper surface of the detection platform (1), and a blocking block (12) is passed through and fixedly installed in the middle of the fixed plate (11); Clamping mechanism: used for fixing the connection end of the pneumatic butterfly valve, the clamping mechanism includes a screw rod (16) and a servo motor (17), the inside of the two sides of the detection platform (1) is symmetrically provided with a slide groove (13), the inside of the slide groove (13) is slidably connected to a slider (14), the front and rear sides of the upper surface of the slider (14) are symmetrically installed with connecting blocks (15), the slider (14) is fixedly connected to the bottom side of the fixed plate (11) through two groups of connecting blocks (15), the screw rod (16) horizontally passes through the middle of the slider (14) and is threadedly connected to the slider (14), the shaft end of the servo motor (17) is fixedly connected to one end of the screw rod (16), and the servo motor (17) is fixedly connected to the middle of one side of the detection platform (1); Detection mechanism: used for detecting internal leakage of the pneumatic butterfly valve, the detection mechanism includes an air pressure sensor (23), a carrier plate (2) is fixedly installed horizontally at the lower end of the fixed plate (11) on the right side, an air pump (21) is fixedly connected to the upper surface of the carrier plate (2), the air outlet end of the air pump (21) is connected to an air charging pipe (22), the air outlet end of the air charging pipe (22) passes through the middle of the block (12) on the right side and is fixedly connected to the block (12), the air pressure sensor (23) is fixedly connected to the inner wall of the air charging pipe (22), and a through opening (27) is opened through the middle of the block (12) on the left side.

2. The off-line internal leakage inspection device for a pneumatic butterfly valve according to claim 1 is characterized in that: A one-way valve (24) is provided inside the inflation tube (22), and the one-way valve (24) is placed between the air pressure sensor (23) and the air inlet end of the inflation tube (22).

3. The off-line internal leakage inspection device for a pneumatic butterfly valve according to claim 1 is characterized in that: A sealing gasket (26) is bonded to the inner side of the fixing plate (11), and the sealing gasket (26) is placed on the outer side of the blocking block (12).

4. The off-line internal leakage inspection device for a pneumatic butterfly valve according to claim 1 is characterized in that: The threads on both sides of the screw rod (16) rotate in opposite directions, and the screw rod (16) is rotatably connected to the detection platform (1) via a bearing.

5. The off-line internal leakage inspection device for a pneumatic butterfly valve according to claim 1 is characterized in that: An industrial control computer (25) is fixedly connected to the front side of the detection platform (1), and a data output end of the air pressure sensor (23) is connected to a data input end of the industrial control computer (25).

6. The off-line internal leakage inspection device for a pneumatic butterfly valve according to claim 1 is characterized in that: Connecting grooves (18) are horizontally provided on the front and rear sides of the inner wall at the top of the slide groove (13), and the two groups of connecting blocks (15) at the top of the slider (14) are respectively slidably connected to the two groups of connecting grooves (18) at the top of the slide groove (13).

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