A Multifunctional Valve Testing Device and Its Usage Method

Abstract

The present invention relates to the technical field of valve detection, and discloses a multi-functional valve testing device and a using method thereof, including a water tank and a base installed in the middle of the water tank through two platforms, and the two platforms are respectively located in the middle of the front and rear sides of the base. Annular tracks are provided on the base, and a number of equally spaced fixed seats are provided on the annular tracks. The annular tracks drive multiple fixed seats for fixed-distance conveying, and the fixed seats move in a cycle around the end face of the base, so that the positions of the fixed seats are reciprocally switched. The annular tracks of the invention can drive the fixed seats for fixed-distance conveying, so that the workbench and the multi-functional valves thereon can automatically switch positions according to the set program. During the testing process, the valves can sequentially pass through multiple stations such as inflation, underwater vibration, bubble detection, and air pressure re-detection, without the need for manual frequent handling of the valves, greatly improving the testing efficiency. At the same time, the detection time is also extended, and the detection result is improved.

Description

Technical Field

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

[0002] In the modern industrial field, valves, as key components of fluid control systems, are widely used in many industries such as petrochemical, power, water supply and drainage, and pharmaceuticals. Their sealing performance is directly related to the safe and stable operation of the entire system and the effective utilization of energy. With the continuous development of industrial technology, the requirements for the quality and performance of valves are becoming increasingly stringent. Therefore, accurate, efficient, and comprehensive valve testing technology has become a key link in the valve manufacturing and use processes.

[0003] Traditional valve testing methods mainly rely on manual operation and have many limitations. For example, in the seal testing link, simple manual jigs are usually used to seal the valve ports. This method is difficult to ensure the consistency and reliability of the seal, and it is easy to cause loose sealing or over-sealing due to human factors, thus affecting the accuracy of the test results. Moreover, when manually operating for gas filling and pressure monitoring, it is difficult to precisely control the gas filling volume and pressure changes, and it cannot meet the requirements of modern high-precision valve testing.

[0004] When detecting the sealing performance of valves, traditional methods often only use a single detection means. For example, only pressure monitoring is used to determine whether the valve leaks. For some minor leaks, the air pressure can basically not be detected. And when testing the sealing performance in water, the generation and attachment of bubbles have always been important factors affecting the detection accuracy. These bubbles may interfere with the judgment of the valve leakage situation by the detection personnel, resulting in misjudgment or inaccurate detection results. Therefore, the present invention provides a multifunctional valve testing device and a using method thereof. Summary of the Invention

[0005] Aiming at the above deficiencies existing in the prior art, the present invention provides a multifunctional valve testing device and a using method thereof, which improve the structure for testing the sealing performance of valves.

[0006] The present invention provides the following technical solutions: A multifunctional valve testing device includes a water tank and a base installed in the middle of the water tank through two platforms, and the two platforms are respectively located in the middle of the front and rear sides of the base. Annular tracks are provided on the base, and a plurality of groups of equally spaced fixed seats are provided on the annular tracks. The annular tracks drive the multiple fixed seats to perform fixed-distance transportation, and the fixed seats move cyclically around the end face of the base, so that the positions of the fixed seats are reciprocally switched;

[0007] A number of sets of guide posts are installed on each of the fixed seats, and a slidable workbench is provided on the number of sets of guide posts. A support side plate and a fixed side plate are installed on the workbench. A valve mold table is installed on the workbench between the support side plate and the fixed side plate, and a multi-functional valve is placed on the valve mold table. A slidable movable table is provided on the workbench. An electric cylinder for pushing the movable table to slide is installed on the fixed side plate. Sealing end sleeves for sealing the ports of the multi-functional valve are installed on the opposite sides of the fixed side plate and the movable table. The two ports of the multi-functional valve are sealed by the two sealing end sleeves;

[0008] A detection system for gas introduction is provided on the fixed side plate and the movable table. The detection system introduces gas into the multi-functional valve through the sealing end sleeve to detect its sealing performance;

[0009] An inflation module for gas input to the detection system is provided on the platform. Each passing detection system is inflated through the inflation module, so that the detection system detects the sealing performance of the multi-functional valve;

[0010] A vibration mechanism is provided at the end inside the water tank under one of the workbenches. The vibration mechanism drives the workbench to move up and down on the guide posts to remove the bubbles attached to the workbench in the water. The bubbles on each passing workbench are eliminated through the vibration mechanism;

[0011] A number of sets of cameras are provided at the bottom of the base. Whether the multi-functional valve below leaks in the water is detected through the cameras to further detect the sealing performance.

[0012] Preferably, the annular track includes two rotatable transmission shafts provided at both ends of the base. The two ends of the transmission shaft are led out from both sides of the base and pulley wheels are installed. The pulley wheels at both ends of the two transmission shafts are driven by a rack belt. The transmission shaft is driven by a motor. Circulation guide rails are installed at both ends of the base. A number of sets of equally spaced sliding platforms are provided on the circulation guide rails. The bottom end of the sliding platform is connected to the rack belt through a bracket. The fixed seat is installed on the sliding platforms at both ends of the base in an L shape, so that the fixed seat is transported around the end face of the base.

[0013] Preferably, the detection system includes an air delivery pipe installed on the fixed side plate. The air delivery pipe penetrates through the fixed side plate and extends out from the middle of the sealing end sleeve. An electric control valve and a valve nozzle are installed on the outer side surface of the fixed side plate. The two ports of the electric control valve are respectively communicated with the air delivery pipe and the valve nozzle through pipelines, so that gas is introduced into the multi-functional valve through the air delivery pipe to detect the sealing performance, and the electric control valve closes the air delivery pipe.

[0014] Preferably, the detection system further includes an air duct installed on the movable table. The air duct is introduced from the side of the movable table and extends out from the middle of the sealing end sleeve. A pressure gauge is installed on the outer air duct to connect the air pressure inside the multi-functional valve through the air duct and detect the sealing performance through the pressure gauge.

[0015] Preferably, the inflation module includes a mold table that can slide back and forth on the platform. The mold table is pushed by a linear motor. Two cylindrical slide rails are installed at the top of the mold table, and a movable table that can slide is provided on the two cylindrical slide rails. Springs for resetting the movable table are provided at both ends of the two cylindrical slide rails. An inflation nozzle is installed on the movable table. The inflation nozzle is connected to an air pump through a pipeline. By moving the mold table forward, the inflation nozzle is docked with the detection system on the workbench. A positioning plate is installed on the movable table, and corresponding positioning grooves are provided on the fixed seat.

[0016] Preferably, the top end of the positioning plate is a V-shaped end, and both sides inside the positioning groove are inclined inward inclined surface grooves, and the end of the inclined surface groove is a straight groove for the introduction of the positioning plate. The V-shaped end on the positioning plate is inserted into the positioning groove, first contacts the inclined surface of the inclined surface groove, and as the positioning plate is inserted, the V-shaped end is guided into the straight groove along the inclined surface of the inclined surface groove to calibrate the position of the inflation module.

[0017] Preferably, the vibration mechanism includes an inner fixed plate seat installed inside the water tank. Electromagnets are installed on the two protrusions of the fixed plate seat, and magnets are inlaid at the top ends of the support side plate and the fixed side plate. When the electromagnet is energized, the same magnetic poles of the electromagnet and the magnet generate a repulsive force, causing the magnet to drive the workbench to move upward. When the electromagnet is powered off, the workbench moves downward under gravity. Repeating this way makes the workbench shake and shakes off the bubbles attached to the workbench.

[0018] Preferably, a heating plate is installed on the fixed plate seat. The heating plate slightly heats the surrounding water, and the heated water will rise to eliminate the bubbles on the surface of the workbench.

[0019] A method for using a multi-functional valve testing device is as follows:

[0020] S1. Indirect operation on the circular track to switch the position of the workbench back and forth. Place the multi-functional valve on the valve mold table on the designated position of the workbench. Push the movable table to move through the electric cylinder, so that the sealing end sleeve on the movable table contacts the port of the multi-functional valve, and the other port of the multi-functional valve contacts the sealing end sleeve on the support side plate, so that the two sealing end sleeves block and position the two ports of the multi-functional valve.

[0021] S2. The annular track continues to run, causing the workbench with the multi-functional valve to switch to the inflation module. The inflation module moves to inflate the detection system on this workbench. When the inflation reaches the specified air pressure, the inflation module disengages from the detection system, and the current air pressure value is detected by the detection system.

[0022] S3. Then the annular track runs, causing this workbench to be introduced into the water. Driven by the vibration mechanism, the workbench vibrates to knock off the bubbles on its surface. The workbench continues to move along with the annular track. Whether there are bubbles exported after the workbench passes through the vibration mechanism is detected by the camera. If there are bubbles exported, it is unqualified. And when the workbench moves out of the water surface along with the annular track, the air pressure value is checked again by the detection system to comprehensively judge the sealing performance of the multi-functional valve.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The annular track can drive the fixed seat to convey at a fixed distance, enabling the workbench and the multi-functional valve on it to automatically switch positions according to the set program. During the test, the valve can sequentially pass through multiple stations such as inflation, underwater vibration, bubble detection, and air pressure re-detection. There is no need for manual frequent handling of the valve, which greatly improves the test efficiency. At the same time, it also extends the detection time and improves the detection result.

[0025] (2) The inflation module drives the mold table to move through a linear motor, and by means of the ingenious cooperation of the positioning plate and the positioning groove, it realizes automatic docking and inflation with the detection system. After inflating to the specified air pressure, it can automatically disengage. The whole process has a high degree of automation, reducing the error and labor intensity of manual operation.

[0026] (3) The detection system adopts a double-sealed end sleeve structure to seal from the two ports of the multi-functional valve. At the same time, by using components such as air pipes, guide pipes, and pressure gauges, not only can gas be introduced into the valve interior, but also the air pressure inside the valve can be monitored in real time. By comparing the air pressure values at different test stages (such as after inflation, after underwater vibration), the sealing performance of the valve can be accurately detected, avoiding misjudgment situations that may occur in a single detection method. Combined with underwater bubble detection, whether there are bubbles generated after the valve vibrates in the water is observed through the camera at the bottom of the water tank, further verifying the sealing performance of the valve from the appearance perspective. This internal and external combined detection method makes the sealing performance detection more comprehensive and reliable.

[0027] (4) The vibration mechanism uses the interaction between the electromagnet and the magnet to cause the workbench to shake up and down, which can effectively shake off the bubbles attached to the surface of the workbench. At the same time, the vibration mechanism is also equipped with a heating plate to heat the surrounding water. Using the principle of hot water rising, the bubbles on the surface of the workbench are further eliminated. Through the combination of these two methods, the interference of bubbles on the sealing performance detection can be minimized to the greatest extent, improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the split structure of the base of the present invention;

[0030] Figure 3 is a schematic diagram of the partial structure of the annular track of the present invention;

[0031] Figure 4 is a schematic diagram of the structures of the workbench and the fixed seat of the present invention;

[0032] Figure 5 is a schematic diagram of the structure of the detection system of the present invention;

[0033] Figure 6 is a schematic diagram of the split structure of the inflation module of the present invention;

[0034] Figure 7 is a schematic diagram of the structure of the vibration mechanism of the present invention.

[0035] In the figure: 1, water tank; 2, platform; 3, base; 4, annular track; 5, fixed seat; 6, guide post; 7, workbench; 8, detection system; 9, support side plate; 10, fixed side plate; 11, valve mold table; 12, movable table; 13, sealing end sleeve; 14, vibration mechanism; 15, camera; 16, inflation module; 17, electric cylinder; 41, transmission shaft; 42, pulley; 43, rack belt; 44, circulating guide rail; 45, sliding table; 81, gas transmission pipe; 82, electric control valve; 83, valve nozzle; 84, guide air pipe; 85, pressure gauge; 161, mold table; 162, cylindrical slide rail; 163, moving table; 164, spring; 165, inflation nozzle; 166, positioning plate; 167, positioning groove; 168, V-shaped end; 169, inclined groove; 1610, straight groove; 141, fixed plate seat; 142, electromagnet; 143, magnet; 144, heating plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and known components are omitted in the present disclosure to avoid unnecessarily obscuring the concepts of the present invention.

[0037] Please refer to Figure 1, a multifunctional valve testing device, which is mainly composed of core components such as a water tank 1, a platform 2, and a base 3. The water tank 1 serves as a container for the test environment and is used to hold the test water. Two platforms 2 are symmetrically installed in the middle of the water tank 1 and in the middle of the front and rear sides of the base 3, providing support and an installation foundation for other components of the device. The annular track 4 provided on the base 3 is the key structure for the entire device to realize the multi-functional valve cycle test process. It can drive a number of equally spaced fixed seats 5 for fixed-distance transportation, so that the fixed seats 5 move cyclically around the end face of the base 3, thereby realizing the orderly switching of the valve test positions.

[0038] Refer to Figure 3 , the annular track 4 works with multiple components. It includes two rotatable drive shafts 41 provided at both ends of the base 3. The two ends of the drive shafts 41 are led out from both sides of the base 3 and are equipped with pulleys 42. The pulleys 42 at both ends of the two drive shafts 41 are driven by a rack belt 43. By driving the drive shafts 41 to rotate with a motor, the rack belt 43 is driven to operate. Circulating guide rails 44 are installed at both ends of the base 3. A number of equally spaced sliding platforms 45 are provided on the circulating guide rails 44. The bottom end of the sliding platform 45 is connected to the rack belt 43 through a bracket. The fixed seats 5 are installed on the sliding platforms 45 at both ends of the base 3 in an L shape. In this way, when the rack belt 43 moves, the sliding platform 45 moves along the circulating guide rail 44, thereby driving the fixed seats 5 to be stably transported around the end face of the base 3. For example, after the motor is started, the drive shafts 41 rotate at a set speed and direction, and the pulleys 42 and the rack belt 43 transmit power to the sliding platform 45, so that the fixed seats 5 move on the annular track 4 at a uniform speed, ensuring the residence time of each test station and the accuracy of the moving process.

[0039] Refer to Figure 4 , a number of guide posts 6 are installed on each fixed seat 5, and a slidable workbench 7 is provided on the guide posts 6. A support side plate 9, a fixed side plate 10, and a valve mold table 11 located between the two are installed on the workbench 7. The multifunctional valve is placed on the valve mold table 11. A slidable movable table 12 is also provided on the workbench 7. An electric cylinder 17 installed on the fixed side plate 10 is used to push the movable table 12 to slide. Sealing end sleeves 13 are installed on the opposite sides of the fixed side plate 10 and the movable table 12. When the electric cylinder 17 works, it pushes the movable table 12 to move towards the multifunctional valve, so that the sealing end sleeve 13 on the movable table 12 is in close contact with one port of the multifunctional valve, and at the same time the other port of the multifunctional valve is in contact with the sealing end sleeve 13 on the support side plate 9, realizing the effective sealing and positioning of the two ports of the multifunctional valve and creating conditions for subsequent sealing detection.

[0040] Refer to Figure 5, the detection system 8 consists of multiple components. The gas transmission pipe 81 installed on the fixed side plate 10 penetrates through the fixed side plate 10 and extends out from the middle of the sealing end sleeve 13. The outer side of the fixed side plate 10 is equipped with an electric control valve 82 and a valve nozzle 83. The two ports of the electric control valve 82 are respectively connected to the gas transmission pipe 81 and the valve nozzle 83 through pipelines. Gas can be introduced into the multi-functional valve through the gas transmission pipe 81 to detect the sealing performance, and the electric control valve 82 can control the closing of the gas transmission pipe 81 to lock the gas in the multi-functional valve, facilitating the detection of the sealing performance test.

[0041] In addition, the gas guide pipe 84 installed on the movable table 12 is introduced from the side of the movable table 12 and extends out from the middle of the sealing end sleeve 13. A pressure gauge 85 is installed on the gas guide pipe 84 located on the outside. During the detection process, gas enters the interior of the multi-functional valve through the gas transmission pipe 81, the gas guide pipe 84 communicates with the air pressure inside the multi-functional valve, and the pressure gauge 85 detects the internal air pressure value of the valve in real time. By comparing the air pressure changes before and after inflation and at different test stages, the sealing performance of the multi-functional valve is judged. For example, after the inflation module 16 inflates the detection system 8 to the specified air pressure, the detection system 8 is separated from the inflation module 16. At this time, the pressure gauge 85 records the initial air pressure value. After the valve undergoes the water vibration test and other processes, check the reading of the pressure gauge 85 again. If the change in the air pressure value is within the allowable range, the sealing performance of the valve is qualified; otherwise, it is unqualified.

[0042] Refer to Figure 6 , the inflation module 16 includes a die table 161 that can slide back and forth on the platform 2 and is pushed by a linear motor. Two cylindrical slide rails 162 are installed at the top of the die table 161, and a movable table 163 that can slide is provided on the two cylindrical slide rails 162. Springs 164 for resetting the movable table 163 are provided at both ends of the cylindrical slide rails 162. An inflation nozzle 165 is installed on the movable table 163, and the inflation nozzle 165 is connected to an air pump through a pipeline. When the annular track 4 operates to switch the workbench 7 installed with the multi-functional valve to the inflation module 16, the die table 161 moves forward under the drive of the linear motor, so that the inflation nozzle 165 is docked with the detection system 8 on the workbench 7.

[0043] The positioning plate 166 installed on the movable table 163 cooperates with the corresponding positioning groove 167 on the fixed seat 5 for position calibration. Specifically, the top of the positioning plate 166 is a V-shaped end 168, and the two sides of the inside of the positioning groove 167 are inclined grooves 169 inclined inwardly, and the end of the inclined groove 169 is a straight groove 1610 introduced by the positioning plate 166. When the V-shaped end 168 on the positioning plate 166 is inserted into the positioning groove 167, it first contacts the inclined surface of the inclined groove 169. With the insertion of the positioning plate 166, the V-shaped end 168 is introduced into the straight groove 1610 along the inclined surface of the inclined groove 169, ensuring that the inflation nozzle 165 is accurately docked with the valve nozzle 83 of the detection system 8, and then the air pump is started to inflate the detection system 8 through the inflation nozzle 165. When the gas is inflated to the specified air pressure, the mold table 161 moves backward and leaves the detection system 8.

[0044] Since the annular track 4 drives the fixed seat 5 to cut off the position, there are small position errors. These may be due to the inability of the inflation module 16 to dock with the detection system 8. Therefore, the position calibration is performed through the positioning plate 166 and the positioning groove 167. During the docking process of the inflation module 16 and the fixed seat 5, the movable platform 163 moves on the cylindrical slide rail 162 to adjust the position. When the inflation module 16 is separated from the fixed seat 5, the spring 164 will drive the movable platform 163 to return to its original position, which is convenient for multiple docking.

[0045] See also Figure 2 and Figure 7 The vibration mechanism 14 is located at the end of the inside of the water tank 1 and under a workbench 7. It includes a fixed plate seat 141 installed inside the water tank 1, and electromagnets 142 are installed on the two protrusions of the fixed plate seat 141, and magnets 143 are embedded on the top of the supporting side plate 9 and the fixed side plate 10. When the electromagnet 142 is energized, the electromagnet 142 and the magnet 143 have the same magnetic poles and generate repulsion, so that the magnet 143 drives the workbench 7 to move up; when the electromagnet 142 is de-energized, the workbench 7 moves down under the action of gravity. Repeated power on and off in this way causes the workbench 7 to shake and shake off the bubbles attached to the workbench 7.

[0046] In addition, the heating plate 144 installed on the fixed plate seat 141 can slightly heat the surrounding water. After the water is heated, it will rise, the thermal motion of the water molecules will be enhanced, and the interaction force will be weakened, resulting in a decrease in the stability of the bubbles, which will gradually disappear, and further eliminate the bubbles on the surface of the workbench 7. For example, when the workbench 7 moves to the top of the vibration mechanism 14 along the annular track 4, the power-on and power-off control program of the electromagnet 142 is started, and the vibration operation is performed according to the set frequency and duration. At the same time, the heating plate 144 works, so that the bubbles on the surface of the workbench 7 can be more thoroughly removed, so that the camera 15 can be used to accurately detect whether the valve is leaking.

[0047] A number of groups of cameras 15 are provided at the bottom of the base 3. When the workbench 7 moves past the vibration mechanism 14 along with the annular track 4, the cameras 15 detect whether there are air bubbles emerging from the multi-functional valve below in the water. If there are air bubbles emerging, it indicates that there may be an air leakage in the valve, and it is determined as unqualified. And when the workbench 7 moves out of the water surface along with the annular track 4, the air pressure value is checked again through the detection system 8, and the tightness of the multi-functional valve is finally determined by comprehensively considering the detection result of air bubbles in the water and the change of the air pressure value. For example, if no air bubbles are detected by the cameras 15 in the water and the change of the air pressure value detected by the detection system 8 after moving out of the water surface is within the allowed small range compared with the initial value, it can be determined that the tightness of the multi-functional valve is good; if there are air bubbles in the water or the change of the air pressure value exceeds the allowed range, it is determined that the tightness of the valve is unqualified.

[0048] A method for using a multi-functional valve testing device is as follows:

[0049] Valve placement and sealing: The annular track 4 runs indirectly to switch the position of the workbench 7 back and forth, and the multi-functional valve is placed on the valve mold table 11 on the workbench 7 at the designated position. Then, the electric cylinder 17 is used to push the movable table 12 to move, so that the sealing end sleeve 13 on the movable table 12 contacts the port of the multi-functional valve, and the other port of the multi-functional valve contacts the sealing end sleeve 13 on the support side plate 9, realizing the blocking and positioning of the two ports of the multi-functional valve by the two sealing end sleeves 13.

[0050] Inflation detection: The annular track 4 continues to run, so that the workbench 7 installed with the multi-functional valve is switched to the inflation module 16. The inflation module 16 moves to inflate the detection system 8 on this workbench 7. When inflated to the designated air pressure, the inflation module 16 disengages from the detection system 8, and the current air pressure value is detected by the detection system 8 and recorded.

[0051] Vibration in water and comprehensive detection: Then the annular track 4 runs to introduce this workbench 7 into the water. Driven by the vibration mechanism 14, this workbench 7 vibrates to knock off the air bubbles on its surface. The workbench 7 continues to move along with the annular track 4, and the cameras 15 are used to detect whether there are air bubbles emerging after this workbench 7 passes through the vibration mechanism 14. If there are air bubbles emerging, it is unqualified. When the workbench 7 moves out of the water surface along with the annular track 4, the air pressure value is checked again through the detection system 8, and the tightness of the multi-functional valve is comprehensively judged. If there are no air bubbles in the water and the change of the air pressure value is within the qualified range, the tightness of the multi-functional valve is qualified; if air bubbles appear or the change of the air pressure value is abnormal, it is determined as unqualified, thus completing the entire testing process of the multi-functional valve.

[0052] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present invention.

Claims

1. A multifunctional valve testing device, characterized in that: It includes a water tank (1) and a base (3) installed in the middle of the water tank (1) through two platforms (2). The two platforms (2) are respectively located in the middle of the front and rear sides of the base (3). An annular track (4) is provided on the base (3). A number of equally spaced fixed seats (5) are provided on the annular track (4). The annular track (4) drives the multiple fixed seats (5) for fixed-distance conveying, and the fixed seats (5) move cyclically around the end face of the base (3) to reciprocally switch the positions of the fixed seats (5). A number of guide columns (6) are installed on each fixed seat (5). A slidable workbench (7) is provided on the number of guide columns (6). A support side plate (9) and a fixed side plate (10) are installed on the workbench (7). A valve die table (11) located between the support side plate (9) and the fixed side plate (10) is installed on the workbench (7). A multi-functional valve is placed on the valve die table (11). A slidable movable table (12) is provided on the workbench (7). An electric cylinder (17) for pushing the movable table (12) to slide is installed on the fixed side plate (10). Sealing end sleeves (13) for sealing the ports of the multi-functional valve are installed on the opposite sides of the fixed side plate (10) and the movable table (12). The two ports of the multi-functional valve are sealed by the two sealing end sleeves (13). A detection system (8) for gas introduction is provided on the fixed side plate (10) and the movable table (12). The detection system (8) introduces gas into the multi-functional valve through the sealing end sleeve (13) to detect its sealing performance. An inflation module (16) for gas input to the detection system (8) is provided on the platform (2). Each passing detection system (8) is inflated through the inflation module (16) so that the detection system (8) detects the sealing performance of the multi-functional valve. The inflation module (16) includes a die table (161) that can slide back and forth on the platform (2). The die table (161) is pushed by a linear motor. Two cylindrical slide rails (162) are installed at the top of the die table (161). A slidable moving table (163) is provided on the two cylindrical slide rails (162). Springs (164) for resetting the moving table (163) are provided at both ends of the two cylindrical slide rails (162). An inflation nozzle (165) is installed on the moving table (163). The inflation nozzle (165) is connected to an air pump through a pipeline. By moving the die table (161) forward, the inflation nozzle (165) is docked with the detection system (8) on the workbench (7). A positioning plate (166) is installed on the moving table (163), and a corresponding positioning groove (167) is provided on the fixed seat (5). The top end of the positioning plate (166) is a V-shaped end (168), and both sides inside the positioning groove (167) are inclined chute grooves (169) that slope inward. The end of the inclined chute groove (169) is a straight groove (1610) for the introduction of the positioning plate (166). The V-shaped end (168) on the positioning plate (166) is inserted into the positioning groove (167), first contacting the inclined surface of the inclined chute groove (169). As the positioning plate (166) is inserted, the V-shaped end (168) is guided into the straight groove (1610) along the inclined surface of the inclined chute groove (169), calibrating the position of the inflation module (16). At the end inside the water tank (1), there is a vibration mechanism (14) located below a workbench (7). The vibration mechanism (14) drives the workbench (7) to move up and down on the guide posts (6), removing the bubbles attached to the workbench (7) in the water. The vibration mechanism (14) eliminates the bubbles on each passing workbench (7). Several groups of cameras (15) are provided at the bottom of the base (3). The cameras (15) are used to detect whether there is air leakage in the multi-functional valve below the water, further detecting the sealing performance. The vibration mechanism (14) includes an inner fixed plate seat (141) installed inside the water tank (1). Electromagnets (142) are installed on both protrusions of the fixed plate seat (141), and magnets (143) are inlaid at the top ends of the support side plate (9) and the fixed side plate (10). When the electromagnet (142) is energized, the same poles of the electromagnet (142) and the magnet (143) generate a repulsive force, causing the magnet (143) to drive the workbench (7) to move upward. When the electromagnet (142) is de-energized, the workbench (7) moves downward under gravity. Repeating this process causes the workbench (7) to shake, shaking off the bubbles attached to the workbench (7). A heating plate (144) is installed on the fixed plate seat (141). The heating plate (144) slightly heats the surrounding water, and the heated water will rise to eliminate the bubbles on the surface of the workbench (7).

2. The multifunctional valve testing device according to claim 1, characterized in that: The annular track (4) includes two rotatable transmission shafts (41) provided at both ends of the base (3). The two ends of the transmission shaft (41) are led out from both sides of the base (3) and are equipped with belt pulleys (42). The belt pulleys (42) at both ends of the two transmission shafts (41) are driven by a rack belt (43). The transmission shaft (41) is driven by a motor. Circulation rails (44) are installed at both ends of the base (3). A number of equally spaced sliding platforms (45) are provided on the circulation rails (44). The bottom end of the sliding platform (45) is connected to the rack belt (43) through a bracket. The fixed seat (5) is installed on the sliding platforms (45) at both ends of the base (3) in an L shape, enabling the fixed seat (5) to be conveyed around the end face of the base (3).

3. The multifunctional valve testing device according to claim 1, characterized in that: The detection system (8) includes an air delivery pipe (81) installed on a fixed side plate (10), and the air delivery pipe (81) penetrates through the fixed side plate (10) and extends out from the middle of the sealing end sleeve (13). An electric control valve (82) and a valve nozzle (83) are installed on the outer side surface of the fixed side plate (10). Two ports of the electric control valve (82) are respectively communicated with the air delivery pipe (81) and the valve nozzle (83) through pipelines, so that gas is introduced into the multi-functional valve through the air delivery pipe (81) to detect the sealing performance, and the electric control valve (82) closes the air delivery pipe (81).

4. The multifunctional valve testing device according to claim 3, characterized in that: The detection system (8) further includes an air guide pipe (84) installed on the movable table (12), and the air guide pipe (84) is introduced from the side surface of the movable table (12) and extends out from the middle of the sealing end sleeve (13). A pressure gauge (85) is installed on the outer air guide pipe (84). The air pressure inside the multi-functional valve is communicated through the air guide pipe (84), and the sealing performance is detected through the pressure gauge (85).

5. A method for using a multi-functional valve testing device, characterized in that, Adopt a multi-functional valve testing device according to any one of claims 1-4, and the specific operation is as follows: S1. The annular track (4) runs indirectly to switch the position of the workbench (7) back and forth. Place the multi-functional valve on the valve mold table (11) on the specified position of the workbench (7). Push the movable table (12) to move through the electric cylinder (17), so that the sealing end sleeve (13) on the movable table (12) contacts the port of the multi-functional valve, and the other port of the multi-functional valve contacts the sealing end sleeve (13) on the support side plate (9), so that the two sealing end sleeves (13) block and position the two ports of the multi-functional valve; S2. The annular track (4) continues to run to switch the workbench (7) installed with the multi-functional valve to the inflation module (16). The inflation module (16) moves to inflate the detection system (8) on this workbench (7). When the inflation reaches the specified air pressure, the inflation module (16) disengages from the detection system (8), and the current air pressure value is detected through the detection system (8); S3. Then the annular track (4) runs to introduce this workbench (7) into the water. Driven by the vibration mechanism (14), this workbench (7) vibrates to knock off the bubbles on its surface. The workbench (7) continues to move along with the annular track (4). It is detected by the camera (15) whether there are bubbles exported after this workbench (7) passes through the vibration mechanism (14). If there are bubbles exported, it is unqualified. And when the workbench (7) moves out of the water surface along with the annular track (4), the air pressure value is checked again through the detection system (8) to comprehensively judge the sealing performance of the multi-functional valve.

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