Valve pressure testing device and using method thereof

Abstract

The invention relates to the technical field of valve pressure testing, in particular to a valve pressure testing device and a using method thereof.The valve pressure testing device comprises a detection water tank, a supporting frame is arranged on the detection water tank, a rotating support structure is rotationally arranged on the supporting frame, and an intermittent driving mechanism capable of driving the rotating support structure to intermittently rotate at all stations is arranged on the supporting frame; a plurality of clamping structures used for positioning and clamping the ball valve main body are arranged on the rotating support structure in the circumferential direction of the rotating support structure, and inflation and deflation pipeline structures used for inflating and deflating the ball valve main body are arranged between the clamping structures; the detection water tank, the rotary support structure, the intermittent driving mechanism, the clamping structure, the inflation and deflation pipeline structure, the feeding slide way structure, the discharging slide way structure and the like cooperate and cooperate with one another to complete exhaust and inflation at the same time, gas recycling can be achieved, exhaust operation and time are saved, and full-process automatic testing can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve pressure testing, and in particular to a valve pressure testing device and a method for using the same. Background Art

[0002] Valves are key components in fluid control systems. Airtightness defects can lead to media leakage during operation. This is especially true when conveying flammable, explosive, toxic, or high-pressure fluids. Leakage can cause serious safety hazards such as fires, explosions, and poisoning. Airtightness pressure testing can promptly identify minor gaps in valves, poor seals, and other issues, preventing safety hazards at the source.

[0003] Publication No. CN118706362B discloses a valve pressure testing device and method, relating to the field of valve testing. The device comprises an air supply output device and a testing fixture. The air supply output device is connected to the front end of the testing fixture via an air intake duct, while the rear end of the testing fixture is equipped with an exhaust duct connected to the outside world. Both the air intake and exhaust ducts are equipped with thermocouples for temperature measurement and pressure gauges for pressure measurement.

[0004] A valve air tightness detection device with publication number CN115524080A includes a detection pool, a lifting assembly and a detection assembly, wherein the detection pool is provided with detection liquid, the lifting assembly is arranged in the detection pool, the lifting assembly includes a lifting plate, and the detection assembly is arranged on the lifting plate, wherein the lifting assembly is used to control the up and down displacement of the lifting plate to control the detection assembly to enter and exit the detection liquid.

[0005] At present, the gas is discharged directly after the test is completed, and it needs to be discharged slowly to ensure safety. This not only fails to achieve gas recycling, resulting in waste of gas resources, but also requires a long discharge time. In addition, the overall degree of automation is low, making it impossible to achieve full-process automated testing. Summary of the Invention

[0006] The purpose of the present invention is to provide a valve pressure testing device and a method of using the same in order to solve the above problems.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a valve pressure testing device, comprising a testing water tank, a support frame provided on the testing water tank, a rotating support structure rotatably provided on the support frame, and an intermittent driving mechanism capable of driving the rotating support structure to intermittently rotate at various stations. The rotating bracket structure is provided with a plurality of clamping structures along its circumferential direction for positioning and clamping the ball valve body, and an air charging and discharging pipe structure for charging and discharging the ball valve body is provided between the clamping structures; Two adjacent workstations are respectively provided with a loading chute structure and a unloading chute structure. The gas in the ball valve body at the unloading chute structure can be filled into the ball valve body at the loading chute structure through the inflation and deflation pipe structure, thereby realizing deflation and inflation operations at the same time.

[0008] Furthermore, the rotating bracket structure includes two parallelly distributed turntables, and a central rotating shaft is provided at the rotation axis of the two turntables. The central rotating shaft is rotatably set on the support frame, and a central turntable is fixed on the central rotating shaft between the two turntables. A plurality of rotating rods are fixed on the outer side of the central turntable with the rotation axis as the center. A clamp is provided on each rotating rod, and the outer contour of the clamp is J-shaped. The clamp is provided with a retaining edge for limiting the end face of the flange on the ball valve body.

[0009] Furthermore, the intermittent drive mechanism includes a driven sheave fixedly mounted on a central rotating shaft, one side of the driven sheave being meshedly connected to a driving dial, the driving dial being rotatably mounted on a support frame, a motor being fixedly mounted on the support frame, and an output shaft end of the motor being connected to the shaft end of the driving dial through a reducer.

[0010] Furthermore, the clamping structure includes a hydraulic cylinder fixedly mounted on the turntable, the push rod head of the hydraulic cylinder is fixedly connected to a clamping plate, the clamping plate is provided with a sealing gasket for sealing against the end face of the flange of the ball valve body, and the clamping plate is provided with an air pressure sensor.

[0011] Furthermore, the air charging and discharging pipe structure includes a group of air inlet pipes and air outlet pipes corresponding to the number of clamping structures respectively. The air inlet pipes and air outlet pipes of two adjacent groups are connected to each other and are connected to connecting pipes. A ventilation channel is formed inside the central rotating shaft, and each connecting pipe is respectively connected to the ventilation channel. An electromagnetic three-way valve is provided at the connection between the air inlet pipe, the air outlet pipe and the connecting pipe.

[0012] Furthermore, two spring air guide tubes are connected to the splint, and a through-hole for passing the spring air guide tubes is opened on the turntable. The two spring air guide tubes are respectively connected to the air inlet pipe and the air outlet pipe. The end of the central rotating shaft is connected to the air filling pipe through a sealed rotary joint, and the air filling pipe is connected to the ventilation channel through a sealed rotary joint.

[0013] Furthermore, the loading slide structure includes two parallel distributed first rails, and a first rail groove is opened on one side of the two first rails opposite to each other. The lower side of the first rail is fixed on the detection water tank through a bracket.

[0014] Furthermore, the unloading slide structure includes two second rail rods distributed in parallel, and a second rail groove is opened on the side opposite to each other of the two second rail rods. A slider is fixedly provided on the lower side of the second rail rod, and an electric telescopic rod is fixed on the detection water tank. The push rod head end of the electric telescopic rod and the slider are fixedly connected to each other. Two guide rods symmetrically distributed with it as the center are provided on both sides of the electric telescopic rod, one end of the two guide rods is fixedly connected to the detection water tank, and the other end of the two guide rods is slidably connected to the guide sliding hole opened at the corresponding position of the slider, and the detection water tank is provided with a support roller for supporting the second rail rod.

[0015] Furthermore, the detection water tank is provided with a detection camera for video-recording and detecting the generated bubbles.

[0016] A method for using a valve pressure testing device comprises the following steps: S1: The intermittent drive mechanism drives the rotating bracket structure to rotate and completes the loading of the ball valve body at the position of the loading slide structure. The ball valve body is positioned and clamped by the clamping structure. The valve stem of the ball valve body is in a closed state, thereby forming a detection chamber at the inlet and outlet ends; S2: The intermittent drive mechanism drives the rotating bracket structure to continue rotating, and the air filling and discharging pipe structure completes the inflation of the detection chamber. The air then enters the detection water tank while continuing to drive the rotating bracket structure to rotate. Whether there is a leak in the ball valve body is determined by whether bubbles are generated; S3: When the intermittent drive mechanism drives the rotating bracket structure to rotate the ball valve body to the position of the unloading chute structure, the gas in the ball valve body at the unloading chute structure is firstly charged into the ball valve body at the loading chute structure by the charging and discharging pipe structure, and the gas at the unloading chute structure is exhausted and the gas at the loading chute structure is filled at the same time; S4: The clamping structure releases the clamping of the ball valve body at the position of the unloading slide structure and completes the final exhaust. Finally, the unloading of the ball valve body is completed through the unloading slide structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By testing the coordination and cooperation among the water tank, rotating bracket structure, intermittent drive mechanism, clamping structure, charging and discharging pipe structure, loading slide structure and unloading slide structure, exhaust and inflation are completed at the same time, which can realize the recycling of gas, save exhaust operation and time, and realize full-process automated testing.

[0018] 2. The intermittent drive mechanism drives the rotating bracket structure to rotate intermittently between multiple stations, and cooperates with the loading slide structure and the unloading slide structure to realize the automatic loading, testing, and unloading of the ball valve body, thereby improving the detection efficiency.

[0019] 3. The rotating bracket structure has multiple functions under the drive of the intermittent drive mechanism. The first function is to cooperate with the loading slide structure to complete the loading operation. The second function is to complete the position conversion of the ball valve body between various stations. The third function is to complete the unloading operation of the ball valve body in the unloading slide structure. The fourth function is to clamp the ball valve body and rotate it into the test water tank to complete the air tightness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This invention Figure 1 A schematic diagram of a three-dimensional structure in a first direction; Figure 3 This invention Figure 2 A schematic diagram of the partially enlarged structure at point B; Figure 4 This invention Figure 1 AA cross-sectional structural diagram; Figure 5 This invention Figure 1 A schematic diagram of a three-dimensional structure in a second direction; Figure 6 This invention Figure 5 A schematic diagram of the partially enlarged structure at point C; Figure 7 It is a schematic diagram of the cross-sectional structure of the first rail rod of the present invention.

[0022] The accompanying drawings are as follows: 1. Detection water tank; 101. Support frame; 2. Rotating bracket structure; 201. Center turntable; 202. Rotating rod; 203. Turntable; 204. Clamp; 205. Stop edge; 206. Pipe hole; 207. Center shaft; 3. Intermittent drive mechanism; 301. Active dial; 302. Driven sheave; 303. Motor; 304. Reducer; 4. Clamping structure; 401. Hydraulic cylinder; 402. Clamp; 403. Sealing gasket; 404. Air pressure sensor; 405. Spring air guide; 5. Inflating and deflating Pipeline structure; 501, gas filling pipe; 502, ventilation channel; 503, sealed rotary joint; 504, air inlet pipe; 505, air outlet pipe; 506, electromagnetic three-way valve; 507, connecting pipe; 6, loading slide structure; 601, first rail rod; 602, bracket; 603, first rail groove; 7, unloading slide structure; 701, second rail rod; 702, slider; 703, electric telescopic rod; 704, guide rod; 705, support roller; 706, second rail groove; 8, digital display control panel; 9, ball valve body; 10, detection camera. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 7 As shown, the present invention provides a valve pressure testing device, including a detection water tank 1 and a digital display control panel 8. The detection water tank 1 is provided with a detection camera 10 for video detection of bubble generation. The digital display control panel 8 and the detection camera 10 are electrically connected to each other. The detection water tank 1 is provided with a support frame 101. The support frame 101 is rotatably provided with a rotating support structure 2. The support frame 101 is provided with an intermittent driving mechanism 3 that can drive the rotating support structure 2 to rotate intermittently between more than four workstations; the rotating support structure 2 is provided with more than four clamping structures 4 for positioning and clamping the ball valve body 9 along its circumferential direction, and the number of the clamping structures 4 corresponds one-to-one to the number of workstations. An air charging and discharging pipe structure 5 for inflating and deflation of the ball valve body 9 is provided between the clamping structures 4; wherein a loading slide structure 6 and a unloading slide structure 7 are respectively provided at two adjacent workstation positions, and the gas in the ball valve body 9 at the position of the unloading slide structure 7 can be filled into the ball valve body 9 at the position of the loading slide structure 6 through the air charging and discharging pipe structure 5, thereby realizing the deflation and inflation operations at the same time.

[0025] See the instructions attached Figure 2 and Figure 3As shown, the rotating bracket structure 2 includes two parallel turntables 203, and a central rotation axis 207 is provided at the rotation axis of the two turntables 203. The central rotation axis 207 is rotatably set on the support frame 101. A central turntable 201 is fixed on the central rotation axis 207 between the two turntables 203. The outer side of the central turntable 201 is fixed with more than four rotating rods 202 evenly distributed around its rotation axis. Each rotating rod 202 is provided with a clamp 204, and the outer contour of the clamp 204 is J-shaped. The clamp 204 is provided with a retaining edge 205 for limiting the end face of the flange on the ball valve body 9. Through the above-mentioned specific structural design, the rotating bracket structure 2 has multiple functions under the drive of the intermittent drive mechanism 3. The first function is to cooperate with the loading slide structure 6 to complete the loading operation. The second function is to complete the position conversion of the ball valve body 9 between various workstations. The third function is to complete the unloading operation of the ball valve body 9 in the unloading slide structure 7. The fourth function is to clamp the ball valve body 9 and rotate it into the detection water tank 1 to complete the air tightness test.

[0026] See the instructions attached Figure 1 、 Figure 4 and Figure 5 As shown, the intermittent drive mechanism 3 includes a driven sheave 302 fixedly set on the central rotating shaft 207, and a driving dial 301 is meshedly connected to one side of the driven sheave 302. The driving dial 301 is rotatably set on the support frame 101, and a motor 303 is fixedly set on the support frame 101. The output shaft end of the motor 303 is connected to the shaft end of the driving dial 301 through a reducer 304, and the output end of the digital display control panel 8 is electrically connected to the input end of the motor 303. After the motor 303 is started, the power of its output shaft is transmitted to the active dial 301 through the reducer 304, driving the active dial 301 to rotate on the support frame 101. The active dial 301 is engaged with the notch on the driven groove wheel 302 through the pin thereon. Through the intermittent engagement transmission of the two, the central rotating shaft 207 and the rotating support structure 2 connected thereto are driven to realize intermittent rotation, so that the ball valve body 9 on the rotating support structure 2 can be switched in order between various workstations, meeting the intermittent operation requirements of different processes such as loading, testing, and unloading.

[0027] See the instructions attached Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the clamping structure 4 includes a hydraulic cylinder 401 fixedly set on the turntable 203, the output end of the digital display control panel 8 is electrically connected to the input end of the hydraulic cylinder 401, and the push rod head end of the hydraulic cylinder 401 is fixedly connected to a clamping plate 402, and the clamping plate 402 is provided with a sealing gasket 403 for sealing against the flange end face of the ball valve body 9, and the clamping plate 402 is provided with an air pressure sensor 404, and the output end of the air pressure sensor 404 is electrically connected to the input end of the digital display control panel 8. In actual application, when the ball valve body 9 is transferred to the loading position, the hydraulic cylinder 401 fixed on the turntable 203 is started, and its push rod extends and drives the clamping plate 402 to approach the flange end face of the ball valve body 9 until the sealing gasket 403 on the clamping plate 402 is sealed against the flange end face, thereby clamping and sealing the ball valve body 9. At the same time, the air pressure sensor 404 on the clamping plate 402 can monitor the air pressure changes inside the ball valve body 9 in real time to determine whether its air tightness is qualified. After the inspection is completed, at the unloading position, the push rod of the hydraulic cylinder 401 contracts, driving the clamping plate 402 to reset, and loosening the ball valve body 9 for subsequent transfer or unloading operations.

[0028] See the instructions attached Figure 1 、 Figure 4 、 Figure 5 and Figure 6As shown, the air charging and discharging pipe structure 5 includes a group of air inlet pipes 504 and air outlet pipes 505 corresponding to the number of the clamping structures 4 respectively. The air inlet pipes 504 and air outlet pipes 505 of the two adjacent groups are connected to each other and are connected to a connecting pipe 507. A ventilation channel 502 is formed inside the central rotating shaft 207, and each connecting pipe 507 is respectively connected to the ventilation channel 502. An electromagnetic three-way valve 506 is provided at the connection between the air inlet pipe 504, the air outlet pipe 505 and the connecting pipe 507. Two spring air guide tubes 405 are connected to the splint 402, and a through-hole 206 for passing the spring air guide tubes 405 is opened on the turntable 203. The two spring air guide tubes 405 are respectively connected to the air inlet pipe 504 and the air outlet pipe 505. The end of the central rotating shaft 207 is connected to the air filling pipe 501 through the sealed rotary joint 503. The air filling pipe 501 is connected to the ventilation channel 502 through the sealed rotary joint 503 to rotate and seal with each other. Through the above-mentioned specific structural design, the electromagnetic three-way valve 506 controls the switching of the paths between the inlet pipe 504, the outlet pipe 505, and the connecting pipe 507 to achieve inflation into the ball valve body 9. When the gas inside the ball valve is released at the unloading station, the electromagnetic three-way valve switches to connect the adjacent inlet pipe and outlet pipe, allowing gas to flow from the ball valve body 9 to be removed to the inlet pipe. The external air source then flows through the gas filling pipe 501 and the sealed rotary joint 503 to the vent 502 inside the central rotating shaft 207. The vent 502 is then connected to the inlet pipe 504 of each station before testing through the connecting pipe 507. The output end of the digital display control panel 8 is electrically connected to the input end of the electromagnetic three-way valve 506.

[0029] See the instructions attached Figure 1 、 Figure 2 、 Figure 5 and Figure 7 As shown, the feeding chute structure 6 includes two parallel first rails 601. A first rail groove 603 is defined on the opposing sides of the two first rails 601. The lower sides of the first rails 601 are secured to the detection water tank 1 via brackets 602. In practice, the clamps 204 can orient the ball valve body 9, thereby facilitating the clamping structure 4 to secure the ball valve body 9. Furthermore, the first rails 601 can be tilted from high to low to achieve automatic feeding.

[0030] The unloading chute structure 7 includes two parallel second rail rods 701, and the two second rail rods 701 are provided with a second rail groove 706 on the side opposite to each other. A slider 702 is fixedly provided on the lower side of the second rail rod 701, and an electric telescopic rod 703 is fixedly provided on the detection water tank 1. The output end of the digital display control panel 8 is electrically connected to the input end of the electric telescopic rod 703, and the push rod head end of the electric telescopic rod 703 and the slider 702 are fixedly connected to each other. Two guide rods 704 symmetrically distributed with the electric telescopic rod 703 are provided on both sides of the electric telescopic rod 703. One end of the two guide rods 704 is fixedly connected to the detection water tank 1, and the other end of the two guide rods 704 is slidably connected to the guide slide hole provided at the corresponding position of the slider 702. The detection water tank 1 is provided with a support roller 705 for supporting the second rail rod 701. Through the above-mentioned specific structural design, when the ball valve body 9 that has been inspected is transferred to the unloading station and released by the clamping structure 4, the electric telescopic rod 703 is activated, and its push rod drives the slider 702 to slide along the guide rod 704, thereby driving the second rail rod 701 to move to the position corresponding to the ball valve body 9. The support roller 705 supports the second rail rod 701 to ensure its stability. The ball valve body 9 falls into the second rail groove 706 on the opposite side of the two second rail rods 701 and slides out along the second rail groove 706 to complete the unloading. After that, the electric telescopic rod 703 drives the slider 702 and the second rail rod 701 to return to their original position, waiting for the next unloading operation. In actual application, the rotation of the rotating bracket structure 2 can play the role of moving the ball valve body 9 on the second rail rod 701, facilitating the unloading of the ball valve body 9 on the second rail rod 701.

[0031] Working principle of the present invention: When in use, the intermittent driving mechanism 3 drives the rotating bracket structure 2 to rotate, and completes the loading of the ball valve body 9 at the position of the loading slide structure 6, and the clamping structure 4 realizes the positioning and clamping of the ball valve body 9, and the valve stem of the ball valve body 9 is in a closed state, thereby forming a detection chamber at the inlet and outlet ends; the intermittent driving mechanism 3 drives the rotating bracket structure 2 to continue to rotate, and the inflation of the detection chamber is completed by the inflation and deflation pipeline structure 5, and enters the detection water tank 1 while continuing to drive the rotating bracket structure 2 to rotate, and judges whether the ball valve body 9 exists by whether bubbles are generated. Leakage situation; when the intermittent driving mechanism 3 drives the rotating bracket structure 2 to rotate with the ball valve body 9 to the position of the unloading slide structure 7, the gas in the ball valve body 9 at the position of the unloading slide structure 7 is first filled into the ball valve body 9 at the position of the loading slide structure 6 by the inflation and deflation pipe structure 5, and the exhaust at the position of the unloading slide structure 7 and the inflation at the position of the loading slide structure 6 are completed at the same time; the clamping structure 4 releases the clamping of the ball valve body 9 at the position of the unloading slide structure 7, and completes the final exhaust, and finally completes the unloading of the ball valve body 9 through the unloading slide structure 7.

[0032] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A valve pressure testing device, characterized in that: The invention comprises a detection water tank (1), wherein a support frame (101) is provided on the detection water tank (1), a rotating support structure (2) is rotatably provided on the support frame (101), and an intermittent driving mechanism (3) capable of driving the rotating support structure (2) to intermittently rotate at various workstations is provided on the support frame (101); The rotating support structure (2) is provided with a plurality of clamping structures (4) along its circumferential direction for positioning and clamping the ball valve body (9), and a gas charging and discharging pipe structure (5) for charging and discharging the ball valve body (9) is provided between the clamping structures (4); Two adjacent workstations are provided with a loading slide structure (6) and a unloading slide structure (7), respectively. The gas in the ball valve body (9) at the unloading slide structure (7) can be filled into the ball valve body (9) at the loading slide structure (6) through the inflation and deflation pipeline structure (5), thereby achieving deflation and inflation operations at the same time.

2. A valve pressure testing device according to claim 1, characterized in that: The rotating support structure (2) includes two parallel rotating disks (203), and a central rotating shaft (207) is provided at the rotating axes of the two rotating disks (203). The central rotating shaft (207) is rotatably arranged on the support frame (101). A central turntable (201) is fixed on the central rotating shaft (207) between the two rotating disks (203). A plurality of rotating rods (202) uniformly distributed around the rotating axis of the central turntable (201) are fixed on the outer side of the central turntable (201). Each rotating rod (202) is provided with a clamp (204), and the outer profile of the clamp (204) is J-shaped. The clamp (204) is provided with a retaining edge (205) for limiting the end face of the flange on the ball valve body (9).

3. A valve pressure testing device according to claim 2, characterized in that: The intermittent drive mechanism (3) comprises a driven sheave (302) fixedly mounted on a central rotating shaft (207); one side of the driven sheave (302) is meshedly connected to a driving dial (301); the driving dial (301) is rotatably mounted on a support frame (101); a motor (303) is fixedly mounted on the support frame (101); an output shaft end of the motor (303) is connected to a shaft end of the driving dial (301) via a reducer (304).

4. A valve pressure testing device according to claim 1, characterized in that: The clamping structure (4) comprises a hydraulic cylinder (401) fixedly arranged on a rotating disk (203), a push rod head end of the hydraulic cylinder (401) being fixedly connected to a clamping plate (402), a sealing gasket (403) for sealingly abutting against an end face of a flange of a ball valve body (9) being provided on the clamping plate (402), and an air pressure sensor (404) being provided on the clamping plate (402).

5. The valve pressure testing device according to claim 1, characterized in that: The inflation and deflation air pipe structure (5) comprises a group of air inlet pipes (504) and air outlet pipes (505) corresponding in number to the clamping structures (4), the air inlet pipes (504) and air outlet pipes (505) of two adjacent groups are connected to each other and are connected to a connecting pipe (507), a ventilation channel (502) is formed inside the central rotating shaft (207), and each connecting pipe (507) is connected to the ventilation channel (502), and an electromagnetic three-way valve (506) is provided at the connection between the air inlet pipe (504), the air outlet pipe (505) and the connecting pipe (507).

6. A valve pressure testing device according to claim 5, characterized in that: Two spring air guide tubes (405) are connected to the clamping plate (402), and a through-hole (206) for passing the spring air guide tubes (405) is provided on the rotating disk (203). The two spring air guide tubes (405) are respectively connected to the air inlet pipe (504) and the air outlet pipe (505). The end of the central rotating shaft (207) is connected to the air supply pipe (501) via a sealing rotary joint (503). The air supply pipe (501) is connected to the ventilation channel (502) in a rotating and sealed manner via the sealing rotary joint (503).

7. The valve pressure testing device according to claim 1, characterized in that: The loading slide structure (6) comprises two parallel distributed first rails (601), a first rail groove (603) being provided on one side of the two first rails (601) facing each other, and the lower side of the first rails (601) is fixedly arranged on the detection water tank (1) via a bracket (602).

8. The valve pressure testing device according to claim 1, characterized in that: The unloading slide structure (7) includes two parallel second rails (701), and the two second rails (701) are provided with a second rail groove (706) on one side opposite to each other. A slider (702) is fixedly provided on the lower side of the second rail (701). An electric telescopic rod (703) is fixedly provided on the detection water tank (1). The push rod head end of the electric telescopic rod (703) and the slider (702) are fixedly connected to each other. Two guide rods (704) are symmetrically distributed around the electric telescopic rod (703) on both sides. One end of the two guide rods (704) is fixedly connected to the detection water tank (1), and the other end of the two guide rods (704) is slidably connected to the guide sliding hole provided at the corresponding position of the slider (702). The detection water tank (1) is provided with a support roller (705) for supporting the second rail (701).

9. The valve pressure testing device according to claim 1, characterized in that: The detection water tank (1) is provided with a detection camera (10) for performing video detection of generated bubbles.

10. A method for using a valve pressure testing device, using the valve pressure testing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The intermittent driving mechanism (3) drives the rotating support structure (2) to rotate, and completes the loading of the ball valve body (9) at the position of the loading slide structure (6), and the clamping structure (4) realizes the positioning and clamping of the ball valve body (9), and the valve stem of the ball valve body (9) is in a closed state, thereby forming a detection chamber at the inlet end and the outlet end; S2: The intermittent driving mechanism (3) drives the rotating support structure (2) to continue rotating, and the air filling and discharging pipe structure (5) completes the inflation of the detection chamber, and the air enters the detection water tank (1) while continuing to drive the rotating support structure (2) to rotate, and judges whether the ball valve body (9) is leaking by whether bubbles are generated; S3: When the intermittent driving mechanism (3) drives the rotating bracket structure (2) to rotate the ball valve body (9) to the position of the unloading slide structure (7), the gas in the ball valve body (9) at the position of the unloading slide structure (7) is firstly filled into the ball valve body (9) at the position of the loading slide structure (6) by the gas filling and discharging pipe structure (5), and the gas at the position of the unloading slide structure (7) and the gas filling at the position of the loading slide structure (6) are completed at the same time; S4: The clamping structure (4) releases the clamping of the ball valve body (9) at the position of the unloading slide structure (7) and completes the final exhaust. Finally, the unloading of the ball valve body (9) is completed through the unloading slide structure (7).

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