Valve sealing performance detection device

Abstract

The utility model provides a valve sealing performance detection device, which mainly relates to the technical field of valve detection and comprises a machine body, a hydraulic cylinder arranged on the machine body, a back plate arranged on a telescopic shaft of the hydraulic cylinder, an upper clamp arranged in the middle of the back plate and a lower clamp arranged at the lower end of the upper clamp. Two clamping heads are symmetrically arranged on the top of the lower clamp in a sliding mode, the two ends of the first tension spring are connected with the clamping heads and the lower clamp respectively, the two ends of the second tension springs are connected with the lower clamp and the vertical plate respectively, two sliding sleeves are arranged on the back plate, L-shaped sliding barrels are arranged on the sliding sleeves in a sliding mode, and air cavities are formed in the L-shaped sliding barrels. A rolling wheel is rotationally arranged at the end of a cross rod of the L-shaped sliding barrel, and the two ends of the first spring are connected with the sliding sleeve and the L-shaped sliding barrel correspondingly. In the process of clamping the valve, the valve is automatically immersed into the water tank, the leakage point of the valve is judged according to the position of the bubble, and large-batch rapid detection can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to a valve sealing performance detection device. Background Art

[0002] Valves are important parts in industrial production. The performance of valves is judged by sealing and strength. The sealing of valves will lead to leakage of media in the system, causing economic losses, and even serious safety accidents. The common valve sealing test method is to use clean nitrogen or air as the medium to pressurize the valve, and then use soapy water to check the sealing of the valve.

[0003] In the prior art, a Chinese patent application with publication number CN214040527U discloses a valve sealing detection device. The device installs the valve on a connecting joint, places the valve in a water storage tank, inputs gas into the valve, and determines the location of the leak based on the bubbles. However, the device is complicated to operate and requires manual connection of the valve and the connector and placement in the water tank, which is inconvenient to operate and easily causes waste of water resources. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a valve sealing performance detection device, which automatically clamps the valve and automatically aligns the air cavity with the inlet of the valve, and the valve automatically enters the water for detection.

[0005] The utility model adopts the following technical scheme: a valve sealing performance detection device includes a body, characterized in that: a hydraulic cylinder is provided on the body, a back plate is provided on the telescopic shaft of the hydraulic cylinder, the back plate is slidably provided on the side wall of the body, an upper clamp is provided in the middle part of the back plate, a lower clamp is provided at the lower end of the upper clamp, and two clamps are symmetrically slidably provided on the top of the lower clamp, the two ends of the tension spring one are respectively connected with the clamp and the lower clamp, there are two tension springs, and the two ends of the tension spring two are respectively connected with the lower clamp and the vertical plate, two sliding sleeves are provided on the back plate, an L-shaped slide tube is slidably provided on the sliding sleeve, an air cavity is provided inside the L-shaped slide tube, a roller is rotatably provided at the end of the cross bar of the L-shaped slide tube, and the two ends of the spring one are respectively connected with the sliding sleeve and the L-shaped slide tube.

[0006] Furthermore, both the upper fixture and the lower fixture are provided with cavities, and the shapes of the cavities of the upper fixture and the lower fixture are consistent with the appearance shape of the valve.

[0007] Furthermore, the vertical plate is in contact with the lower clamp.

[0008] Furthermore, a separation top plate is provided on the vertical plate, and the separation top plate is used to drive the two clamps to move.

[0009] Furthermore, a sealing gasket is provided at the lower outlet of the air cavity of the L-shaped slide cylinder.

[0010] Furthermore, a pressure gauge, a switch valve and an air pump are provided at the upper inlet of the air cavity of the L-shaped slide cylinder.

[0011] Furthermore, the machine body is provided with two baffles, a push plate is slidably provided on the side of the baffle, a plurality of springs are provided, the two ends of the spring are respectively connected to the baffle and the push plate, and the upper end of the machine body is an inclined surface.

[0012] Furthermore, a water tank is provided on the machine body, the water tank is used to store liquid, a release pipe is provided at the bottom of the water tank, and a switch valve is provided on the release pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects: (1) the upper clamp and the lower clamp of the utility model automatically clamp the valve to be tested, and the two clamps fix the neck of the valve in advance to prevent the valve from falling during the tightening process; (2) during the valve clamping process of the utility model, the sealing gaskets on the two L-shaped slides automatically contact the inlet and outlet of the valve, and the air cavity of the L-shaped slide is automatically aligned with the valve to inflate the valve and perform a sealing test. The same L-shaped slide can be used for valves of different widths to ensure a tight seal between the air cavity and the valve; (3) during the valve clamping process of the utility model, the valve is automatically immersed in the water tank, and the leakage point of the valve is determined according to the position of the bubbles. The operator does not come into contact with water, thereby avoiding waste of water resources; (4) the valve sealing test process of the utility model is convenient and fast, and can realize large-scale rapid testing, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0015] Figure 2 It is a schematic diagram of the overall structure of the embodiment without a water tank.

[0016] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0017] Figure 4 It is a schematic diagram of the installation structure of the upper clamp and the lower clamp of the embodiment.

[0018] Figure 5 Schematic diagram of the installation structure of the clamp and the tension spring 1 of the embodiment.

[0019] Figure 6 Schematic diagram of the cross-sectional structure of the L-shaped slide cylinder and the sliding sleeve of the embodiment.

[0020] Figure 7 Schematic diagram of the structure of the vertical plate and the separated top plate of the embodiment.

[0021] Figure numbers: 1-machine body; 2-hydraulic cylinder; 3-back plate; 4-upper clamp; 5-lower clamp; 6-valve; 7-chuck; 8-tension spring 1; 9-tension spring 2; 10-vertical plate; 11-separation top plate; 12-sliding sleeve; 13-L-type slide; 131-air cavity; 14-pressure gauge; 15-switch valve; 16-air pump; 17-spring 1; 18-roller; 19-sealing pad; 20-baffle; 21-push plate; 22-spring 2; 23-water tank; 24-release pipe. DETAILED DESCRIPTION

[0022] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0023] like Figures 1 to 7 As shown, the utility model provides a valve sealing performance detection device, including a body 1, a hydraulic cylinder 2 is provided on the body 1, a back plate 3 is provided on the telescopic shaft of the hydraulic cylinder 2, the back plate 3 is slidably provided on the side wall of the body 1, an upper clamp 4 is provided in the middle part of the back plate 3, a lower clamp 5 is rotatably provided at the lower end of the upper clamp 4, two clamps 7 are symmetrically slidably provided on the top of the lower clamp 5, two ends of a tension spring 8 are respectively connected with the clamp 7 and the lower clamp 5, there are two tension springs 9, and the two ends of the tension spring 9 are respectively connected with the lower clamp 5 and the vertical plate 10, two sliding sleeves 12 are provided on the back plate 3, an L-shaped slide 13 is slidably provided on the sliding sleeve 12, an air cavity 131 is provided inside the L-shaped slide 13, a roller 18 is rotatably provided at the end of the cross bar of the L-shaped slide 13, and the two ends of a spring 17 are respectively connected with the sliding sleeve 12 and the L-shaped slide 13.

[0024] Specifically, the hydraulic cylinder 2 provides a driving force to drive the back plate 3 to move up and down; when the back plate 3 is in the upper position, the tension spring 2 9 provides a pulling force to open the lower clamp 5; when the back plate 3 moves to the lower position, the vertical plate 10 supports the lower clamp 5, driving the lower clamp 5 to rotate, overcoming the tension of the tension spring 2 9, thereby closing the lower clamp 5 and the upper clamp 4.

[0025] The upper fixture 4 and the lower fixture 5 are both provided with cavities, and the shapes of the cavities of the upper fixture 4 and the lower fixture 5 are consistent with the appearance shape of the valve 6 .

[0026] Specifically, when the upper clamp 4 and the lower clamp 5 are closed, the upper clamp 4 and the lower clamp 5 tighten the valve 6 .

[0027] The vertical plate 10 is in contact with the lower clamp 5 .

[0028] Specifically, when the back plate 3 is in the upper position, the lower clamp 5 contacts the upper surface of the vertical plate 10 ; when the back plate 3 is in the lower position, the lower clamp 5 contacts the side surface of the vertical plate 10 .

[0029] The vertical plate 10 is provided with a separation top plate 11, which is used to drive the two clamps 7 to move, and the elastic force of the tension spring 2 9 is greater than the elastic force of the tension spring 1 8.

[0030] Specifically, the separation top plate 11 is triangular in shape, and the lower surface of the clamp 7 is chamfered. When the back plate 3 is in the upper position, the lower clamp 5 contacts the upper surface of the vertical plate 10, and the separation top plate 11 drives the two clamps 7 to move, so that the two clamps 7 are separated and the tension spring 8 is stretched; when the back plate 3 moves downward, the separation top plate 11 leaves the clamp 7, and under the tension of the tension spring 8, the two clamps 7 move toward the middle at the same time to clamp the neck of the valve 6.

[0031] A sealing gasket 19 is provided at the lower outlet of the air cavity 131 of the L-shaped slide cylinder 13 , and the sealing gasket 19 plays a sealing role.

[0032] A pressure gauge 14 , a switch valve 15 , and an air pump 16 are provided at the upper inlet of the air cavity 131 of the L-shaped slide cylinder 13 .

[0033] Specifically, the switch valve 15 is opened, the air pump 16 is started, and air is inflated into the air cavity 131 . When the pressure rises, the switch valve 15 is closed, and the air pump 16 is stopped. The pressure gauge 14 is used to display the internal pressure of the air cavity 131 .

[0034] The body 1 is provided with two baffles 20, and a push plate 21 is slidably provided on the side of the baffle 20. A plurality of springs 22 are provided, and the two ends of the spring 22 are respectively connected to the baffle 20 and the push plate 21. The upper end of the push plate 21 is an inclined surface. The elastic force of the spring 22 is greater than the elastic force of the spring 1 17, and the same elastic force of the spring 22 is sufficient to overcome the sum of the elastic force of the spring 1 17 and the air pressure of the air cavity 131.

[0035] Specifically, when the back plate 3 moves from the upper position to the lower position, the roller 18 first contacts the inclined surface of the push plate 21, and the roller 18 rolls on the inclined surface and the side surface of the push plate 21 in turn. The push plate 21 drives the L-shaped slide 13 to move toward the middle direction. Since the elastic force of the spring 22 is greater than the elastic force of the spring 17, the two sealing gaskets 19 contact the inlet and outlet of the valve 6 respectively, and for valves 6 of different sizes, the sealing gaskets 19 can contact the inlet and outlet of the valve 6.

[0036] The machine body 1 is provided with a water tank 23 for storing liquid. A release pipe 24 is provided at the bottom of the water tank 23 , and a switch valve is provided on the release pipe 24 .

[0037] Specifically, when the liquid in the water tank 23 needs to be replaced, the switch valve on the release pipe 24 is opened to release the liquid in the water tank 23 .

[0038] Working principle: the telescopic shaft of the hydraulic cylinder 2 contracts, so that the back plate 3 is in the upper position. At this time, the tension spring 9 provides tension to separate the lower clamp 5 and the upper clamp 4. The lower clamp 5 contacts the upper surface of the vertical plate 10, and the separation top plate 11 drives the two clamps 7 to move, so that the two clamps 7 are separated, the tension spring 8 is stretched, and water is stored in the water tank 23.

[0039] The valve 6 is placed in the cavity of the lower clamp 5, and the hydraulic cylinder 2 is started to extend the telescopic shaft of the hydraulic cylinder 2, and the back plate 3 begins to move downward, and the top plate 11 is separated from the clamp 7. Under the tension of the tension spring 8, the two clamps 7 move toward the middle at the same time to clamp the neck of the valve 6 to ensure that the valve 6 does not fall off during the rotation of the lower clamp 5; the telescopic shaft of the hydraulic cylinder 2 continues to extend, and the vertical plate 10 supports the lower clamp 5, driving the lower clamp 5 to rotate, overcoming the tension of the tension spring 9, so that the lower clamp 5 and The upper clamp 4 is closed, and the lower clamp 5 and the upper clamp 4 clamp the valve 6; and the tension spring 1 8 first contacts the inclined surface of the push plate 21, and the roller 18 rolls on the inclined surface and the side surface of the push plate 21 in turn, and the push plate 21 drives the L-shaped slide 13 to move toward the middle direction. Since the elastic force of the spring 22 is greater than the elastic force of the spring 1 17, the two sealing gaskets 19 contact the inlet and outlet of the valve 6 respectively, and the two air cavities 131 are aligned with the inlet and outlet of the valve 6; at the same time, the valve 6 is immersed in the liquid in the water tank 23.

[0040] Open one switch valve 15, start the corresponding air pump 16, ensure that the other switch valve 15 is closed, inflate the air cavity 131, and fill the valve 6 with gas. When the pressure rises, close the switch valve 15 and stop the operation of the air pump 16. The pressure gauge 14 is used to display the internal pressure of the air cavity 131. Observe the pressure gauge 14 to check whether the pressure drops. At the same time, observe whether there are bubbles in the liquid in the water tank 23 to check the sealing performance of the valve body. If there is a leak, the position of the valve seal can be judged based on the bubble point.

[0041] When the valve needs to be removed, the telescopic shaft of the hydraulic cylinder 2 is retracted again to move the back plate 3 to the upper position again, thereby releasing the valve.

[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A valve sealing performance detection device, comprising a body (1), characterized in that: A hydraulic cylinder (2) is provided on the body (1), a back plate (3) is provided on the telescopic shaft of the hydraulic cylinder (2), the back plate (3) is slidably provided on the side wall of the body (1), an upper clamp (4) is provided in the middle part of the back plate (3), a lower clamp (5) is provided at the lower end of the upper clamp (4), two clamps (7) are symmetrically slidably provided on the top of the lower clamp (5), two ends of a tension spring (8) are respectively connected to the clamp (7) and the lower clamp (5), and a tension spring (9) is provided on the upper end of the lower clamp (4). ), the two ends of the tension spring 2 (9) are respectively connected to the lower clamp (5) and the vertical plate (10), the back plate (3) is provided with two sliding sleeves (12), the sliding sleeves (12) are slidably provided with an L-shaped sliding cylinder (13), the L-shaped sliding cylinder (13) is provided with an air cavity (131) inside, the cross bar end of the L-shaped sliding cylinder (13) is rotatably provided with a roller (18), and the two ends of the spring 1 (17) are respectively connected to the sliding sleeve (12) and the L-shaped sliding cylinder (13).

2. A valve sealing performance detection device according to claim 1, characterized in that: According to the above, both the upper clamp (4) and the lower clamp (5) are provided with cavities, and the shapes of the cavities of the upper clamp (4) and the lower clamp (5) are consistent with the appearance shape of the valve (6).

3. A valve sealing performance detection device according to claim 1, characterized in that: The vertical plate (10) is in contact with the lower clamp (5).

4. A valve sealing performance detection device according to claim 1, characterized in that: A separation top plate (11) is provided on the vertical plate (10), and the separation top plate (11) is used to drive the two clamps (7) to move.

5. A valve sealing performance detection device according to claim 1, characterized in that: A sealing gasket (19) is provided at the lower outlet of the air cavity (131) of the L-shaped slide cylinder (13).

6. A valve sealing performance detection device according to claim 1, characterized in that: A pressure gauge (14), a switch valve (15), and an air pump (16) are provided in sequence at the upper inlet of the air cavity (131) of the L-shaped slide cylinder (13).

7. A valve sealing performance detection device according to claim 1, characterized in that: The machine body (1) is provided with two baffles (20), a push plate (21) is slidably provided on the side of the baffle (20), a plurality of springs (22) are provided, and the two ends of the springs (22) are respectively connected to the baffle (20) and the push plate (21), and the upper end of the machine body (1) is an inclined surface.

8. A valve sealing performance detection device according to claim 1, characterized in that: The machine body (1) is provided with a water tank (23) for storing liquid. A release pipe (24) is provided at the bottom of the water tank (23), and a switch valve is provided on the release pipe (24).

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