Double-station air valve airtightness detection device

Abstract

The utility model discloses a double-station air valve air tightness detection device, which relates to the field of air valve production and processing and comprises a device main body, a pair of air tightness detection devices are symmetrically arranged on the device main body at an oblique angle, and a control device is arranged between the pair of air tightness detection devices. A feeding device is arranged on the side, close to the other airtight detection device, of one airtight detection device, and a conveying device matched with the feeding device is arranged on one side of the device body. According to the utility model, through the reasonably designed material conveying device and the inclined arrangement of the first material conveying belt in the material placing groove, the stable and stable supply and conveying of the air valve assembly are realized, the accurate detection of the tiny leakage of the air valve assembly can be realized, and meanwhile, the design of air holes and connecting pieces in the placing groove is detected; the stability and reliability of the air pressure in the detection process are ensured, the detection precision is further improved, and meanwhile, a limiting plate is arranged to ensure that the air valve assembly passes in a specified form and the stable proceeding of subsequent air tightness detection is ensured.

Description

Technical Field

[0001] This utility model relates to the field of air valve manufacturing and processing, specifically to a dual-position air valve air tightness testing device. Background Technology

[0002] With the continuous advancement of industrial manufacturing technology, automated production has become the mainstream trend in modern manufacturing. Among various mechanical equipment, air valves, as key components controlling fluid flow, directly affect the operational efficiency and safety of the entire equipment. Therefore, efficient and accurate testing of air valve components to ensure their airtightness meets standards during the production process has become a crucial issue that manufacturing enterprises must address. Especially in the automotive, home appliance, and aerospace industries, the airtightness requirements for air valves are even more stringent, driving the continuous development and innovation of airtightness testing technology.

[0003] In the production process of air valves, airtightness testing is a crucial step. Traditional airtightness testing devices typically rely on manual monitoring methods, where the air valve is manually placed into the testing instrument at a specified direction and angle. This approach is not only inefficient but also prone to misjudgments due to human error, making it difficult to meet the demands of large-scale production. Therefore, developing automated and intelligent airtightness testing devices has become an industry consensus. In recent years, with the rapid development of sensor technology, automation technology, and machine vision, dual-station airtightness testing devices have emerged. These devices can improve testing efficiency while reducing labor costs and enhancing testing accuracy, thus meeting the demands of modern manufacturing for high-quality and high-efficiency production.

[0004] However, existing valve airtightness testing devices still require manual intervention in the processes of valve component loading, testing, and unloading, failing to achieve fully automated production and increasing labor costs and operational risks. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a dual-station airtightness testing device for air valves, so as to solve the problem that existing airtightness testing devices still require manual intervention in the processes of loading, testing and unloading air valve components, which fails to achieve fully automated production and increases labor costs and operational risks.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-position airtightness testing device for air valves, comprising a main body, a pair of airtightness testing devices symmetrically arranged at an oblique angle on the main body, a control device between the pair of airtightness testing devices, a feeding device on the side of each airtightness testing device near the other airtightness testing device, a conveying device on one side of the main body in conjunction with the feeding device, and a discharge trough on one side of the main body in conjunction with the conveying device. Several air valve assemblies are placed in the discharge trough, and several support frames are provided at the bottom of the discharge trough. The conveying device includes a first conveyor belt, several second partition plates are provided on the first conveyor belt, the first conveyor belt is positioned at a certain angle in the discharge trough, and a support connecting plate is positioned at a certain angle in the discharge trough in conjunction with the first conveyor belt. A pair of first drive shafts are symmetrically arranged at both ends. The first drive shafts are rotatably connected to the support connecting plate. The top of the support connecting plate is provided with a part guide channel in conjunction with the first conveyor belt. A first conveyor trough is provided on one side of the discharge trough. The first conveyor trough is located above the discharge trough and is parallel to the discharge trough. A second conveyor trough is provided at the end of the first conveyor trough near the part guide channel. The second conveyor trough is connected to the discharge port of the part guide channel. The second conveyor trough is set at the same angle as the support connecting plate. The second conveyor trough is set in an "L" shape. The side of the second conveyor trough near the support connecting plate has an "L" shaped opening direction connected to the support connecting plate. A partition block is provided at the connection between the first conveyor trough and the second conveyor trough. A screening groove is opened on the first conveyor trough. A limit plate is provided in the first conveyor trough in conjunction with the screening groove.

[0007] By adopting the above technical solution, the air valve assembly is transported, and the air valve assembly can only pass through the second feed chute in a vertical state by means of the partition block. At the same time, the air valve assembly passes through the first feed chute in a specific state by means of the limiting plate to complete the subsequent air tightness test of the air valve.

[0008] The present invention is further configured such that the other end of the first feeding trough away from the part guiding channel extends to the top of the device body, and a shelf is provided on the device body in conjunction with the discharge port of the first feeding trough. A baffle is provided on the shelf at a distance from one end of the discharge port of the first feeding trough, and a first cylinder is provided on the shelf. A push plate is connected to the side of the first cylinder near the baffle, and the width of the push plate is equal to the distance between the discharge port of the first feeding trough and the baffle.

[0009] By adopting the above technical solution, the first air lever controls the push plate to push the air valve assembly to the next assembly, ensuring that only one air valve assembly passes through at a time.

[0010] The present invention is further configured such that a feeding device is provided on the side of the shelf away from the first cylinder, the feeding device includes a third conveyor belt, a first support plate and a third support plate are symmetrically arranged on both sides of the third conveyor belt, a second guide shaft is symmetrically arranged at both ends of the third conveyor belt, a plurality of first partition plates are provided on the third conveyor belt, the second guide shaft is rotatably connected to the first support plate and the third support plate, a device support plate is provided on the side of the third support plate away from the third conveyor belt, and a plurality of detection placement slots are provided on the device support plate.

[0011] By adopting the above technical solution, a valve assembly is transported in pairs by setting several first partition plates, and the valve assembly is tested by testing placement slots.

[0012] The present invention is further configured such that a fourth conveyor belt is provided on one side of the device support plate, a second support plate is provided on the device body in conjunction with the fourth conveyor belt, a guide plate is provided on the side of the second support plate away from the fourth conveyor belt, and a defective product collection trough is provided on the outside of the device body in conjunction with the guide plate.

[0013] By adopting the above technical solution, the guide plate guides the defective valve components, causing them to fall into the defective product collection tank for collection.

[0014] The present invention is further configured such that a clamping mechanism is provided above the plurality of detection placement slots, the clamping mechanism including a symmetrically arranged fixed plate, an installation plate movably arranged inside the fixed plate, a plurality of connecting rods corresponding to the plurality of detection placement slots at the bottom of the installation plate, a connecting rod at the top of the installation plate, the connecting rod extending to the outside of the fixed plate and connecting to a second cylinder, a guide groove provided on the inner wall of the fixed plate in conjunction with the installation plate, a mechanical gripper provided at the bottom of the connecting rod, and a control motor provided on the installation plate in conjunction with the mechanical gripper.

[0015] By adopting the above technical solution, several air valve components are clamped, the air valve components are clamped, and the air valve components are controlled to move on the third conveyor belt, the detection placement groove, the fourth conveyor belt and the guide plate, thus completing the movement of the air valve components.

[0016] The present invention is further configured such that a guide block is provided on one side of the fixed plate, a support rod is provided on the side of the guide block away from the fixed plate, the support rod is connected to the main body of the device, a connecting block is provided on the fixed plate in conjunction with the guide block, a card plate is fixedly provided on one side of the connecting block, a pair of stepper motors are symmetrically arranged at both ends of the guide block, a rotating shaft is rotatably arranged between the stepper motors, and the rotating shaft passes through the card plate.

[0017] By adopting the above technical solution, a stepper motor drives a rotating shaft, which in turn moves the clamping plate, which in turn moves the fixing plate, thereby realizing the movement of the clamping component.

[0018] The present invention is further configured such that an air hole is provided at the bottom of the detection placement slot, a connector is provided at the bottom of the detection placement slot in conjunction with the air hole, and several indicator lights are provided on the device support plate in conjunction with several detection placement slots.

[0019] By adopting the above technical solution, the results of the air tightness test of the air valve assembly in the test placement slot are displayed by the indicator light.

[0020] The present invention is further configured such that the air valve assembly is composed of a first air valve body and a second air valve body, the first and second conveying troughs are covered with a second conveying belt, and a pair of first guide shafts are provided inside the first and second conveying troughs in cooperation with the second conveying belt.

[0021] By adopting the above technical solution, the air valve assembly in the conveying trough is moved in an orderly manner by the second conveying belt.

[0022] In summary, the present invention has the following main advantages:

[0023] This invention, through a rationally designed material conveying device, with the first conveyor belt inclined within the discharge trough, achieves a smooth and stable supply and conveying of the air valve assembly, ensuring the number of air valves screened per batch and guaranteeing the continuous and stable operation of the device. Furthermore, by setting up a screening trough and a limiting plate, the air valve assembly undergoes preliminary screening and positioning. The device employs a high-precision airtightness detection device, coupled with a precise detection and control system, enabling accurate detection of minute leaks in the air valve assembly. Simultaneously, the design of the air holes and connectors within the detection placement trough ensures the stability and reliability of the air pressure during the detection process, further improving detection accuracy. The limiting plate also ensures that the air valve assembly passes through in a designated configuration, guaranteeing the stability of subsequent airtightness testing. Attached Figure Description

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a partial structural schematic diagram of the present invention;

[0026] Figure 3 This is a schematic diagram of the feeding device of this utility model;

[0027] Figure 4 This is a schematic diagram of the airtightness testing device of this utility model;

[0028] Figure 5This is a side sectional view of the material conveying trough of this utility model;

[0029] Figure 6 This is a schematic diagram of the internal structure of the detection placement slot of this utility model;

[0030] Figure 7 This is a schematic diagram of the internal structure of the fixing plate of this utility model;

[0031] Figure 8 This is a schematic diagram of the overall structure of the detection placement slot of this utility model;

[0032] Figure 9 This is a schematic diagram of the air valve assembly structure of this utility model.

[0033] In the diagram: 1. Main body of the device; 2. Conveying device; 3. Discharge trough; 4. Support frame; 5. Defective product collection trough; 6. Air tightness testing device; 7. Support rod; 8. Control device; 9. First valve body; 10. First drive shaft; 11. First conveyor belt; 12. First cylinder; 13. Baffle; 14. Indicator light; 15. Second valve body; 16. Detection placement trough; 17. Guide block; 18. Stepper motor; 19. Rotating shaft; 20. Connecting block; 21. Clamping plate; 22. Fixing plate; 23. Second cylinder; 24. First conveying trough; 25. Push plate; 26. Screening trough; 27. Limiting plate ; 28. Separator block; 29. ​​Second conveyor chute; 30. Second conveyor belt; 31. First guide shaft; 32. Connecting rod; 33. Mechanical gripper; 34. Third conveyor belt; 35. First support plate; 36. Second guide shaft; 37. Second support plate; 38. Guide plate; 39. Fourth conveyor belt; 40. Third support plate; 41. Air hole; 42. Connector; 43. Guide groove; 44. Connecting rod; 45. Mounting plate; 46. Control motor; 47. First partition plate; 48. Connecting plate; 49. Parts guide channel; 50. Shelf plate; 51. Device support plate; 52. Second partition plate. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The embodiments of this utility model will be described below based on its overall structure.

[0036] A dual-position air valve air tightness testing device, such as Figure 1-9As shown, the device includes a main body 1. A pair of airtightness detection devices 6 are symmetrically arranged at an angle on the main body 1. A control device 8 is positioned between the pair of airtightness detection devices 6. The control device 8 mainly controls the opening, operating speed, and closing of the entire device. A feeding device is located on the side of each airtightness detection device 6 closest to the other. A conveying device 2 is located on one side of the main body 1 in conjunction with the feeding device. A discharge trough 3 is located on one side of the main body 1 in conjunction with the conveying device 2. Several air valve assemblies are placed inside the discharge trough 3. Several support frames 4 are located at the bottom of the discharge trough 3 to support the discharge trough 3 and position it at a specified height. The conveying device 2 includes a first conveyor belt 11. A plurality of second partition plates 52 are provided on the conveyor belt 11. The first conveyor belt 11 is set at a certain angle in the discharge trough 3. A support connecting plate 48 is set at a certain angle in the discharge trough 3 in conjunction with the first conveyor belt 11. A pair of first drive shafts 10 are symmetrically arranged at both ends of the first conveyor belt 11. The first drive shafts 10 are rotatably connected to the support connecting plate 48. The first conveyor belt 11 drives the second partition plates 52 to rotate, thereby causing the air valve assembly in the discharge trough 3 to be lifted to the top of the first conveyor belt 11. A part guide channel 49 is provided on the top of the support connecting plate 48 in conjunction with the first conveyor belt 11. A first conveyor trough 24 is provided on one side of the discharge trough 3. The first conveyor trough 24 is located above the discharge trough 3. Parallel to the feeding trough 3, the first feeding trough 24 has a second feeding trough 29 at one end near the part guide channel 49. The second feeding trough 29 is connected to the outlet of the part guide channel 49. The second feeding trough 29 is angled to the support connecting plate 48. The second feeding trough 29 is L-shaped, with its L-shaped opening connected to the support connecting plate 48 on the side near the support connecting plate 48. A separator block 28 is provided at the connection between the first feeding trough 24 and the second feeding trough 29. The air valve assembly consists of a first air valve body 9 and a second air valve body 15. A second feeding belt 30 is fitted over the first feeding trough 24 and the second feeding trough 29. A pair of first guide shafts 31 are provided inside the second conveyor belt 30. A screening groove 26 is provided on the first conveyor trough 24. A limit plate 27 is provided inside the first conveyor trough 24 in conjunction with the screening groove 26. After the air valve assembly is transported to the top by the first conveyor belt, it falls into the second conveyor trough 29 through the part guide channel 49. After falling into the second conveyor trough 29, it rolls downward along the second conveyor trough 29 and the connecting plate 48 under the action of gravity. If the air valve assembly is vertical at this time, it can enter the first conveyor trough 24 if the diameter distance between the separator block 28 and the second conveyor trough 29 is met. After entering the first conveyor trough 24, the air valve assembly is no longer blocked by the separator block 28 and returns to its flat state. At this time, the air valve assembly has two states.With the first valve body 9 and the second valve body facing upwards, the valve assembly passes through the screening trough 26 under the action of the second conveyor belt 30. If the first valve body 9 is facing upwards, the second valve body 15 can pass through the bottom of the limiting plate 27. Conversely, if the second valve body 15 is facing upwards, the compression mechanism between the first valve body 9 and the limiting plate 27 will push the valve assembly to one side, causing it to fall back into the feeding trough 3 for feeding.

[0037] The other end of the first feeding trough 24, away from the part guiding channel 49, extends to the top of the device body 1. A shelf 50 is provided on the device body 1 to match the outlet of the first feeding trough 24. A baffle 13 is provided on the shelf 50 at a distance from one end of the outlet of the first feeding trough 24. A first cylinder 12 is provided on the shelf 50. A push plate 25 is connected to the side of the first cylinder 12 near the baffle 13. The width of the push plate 25 is equal to the distance between the outlet of the first feeding trough 24 and the baffle 13. In this way, after the valve assembly is pushed to contact the baffle 13, the push plate 25 pushes the valve assembly, so that the push plate 25 can only push one valve assembly to the next assembly at a time.

[0038] A feeding device is provided on the side of the shelf 50 away from the first cylinder 12. The feeding device includes a third conveyor belt 34. A first support plate 35 and a third support plate 40 are symmetrically arranged on both sides of the third conveyor belt 34. A second guide shaft 36 is symmetrically arranged at both ends of the third conveyor belt 34. A plurality of first partition plates 47 are provided on the third conveyor belt 34. In actual use, every two first partition plates 47 correspond to one valve assembly. The push plate 25 pushes out one valve assembly at a time. The second guide shaft 36 is rotatably connected to the first support plate 35 and the third support plate 40. A device support plate 51 is provided on the side of the third support plate 40 away from the third conveyor belt 34. A plurality of detection pins are provided on the device support plate 51. In conjunction with the placement slots 16, a clamping mechanism is provided above each of the detection placement slots 16. The clamping mechanism includes a symmetrically arranged fixed plate 22. An mounting plate 45 is movably disposed within the fixed plate 22. A plurality of connecting rods 32 are provided at the bottom of the mounting plate 45 corresponding to the detection placement slots 16. A connecting rod 44 is provided at the top of the mounting plate 45, extending to the outside of the fixed plate 22 and connecting to a second cylinder 23. A guide groove 43 is provided on the inner wall of the fixed plate 22 to cooperate with the mounting plate 45. A mechanical gripper 33 is provided at the bottom of the connecting rod 32. A control motor 46 is provided on the mounting plate 45 in conjunction with the mechanical gripper 33. The second cylinder 23 controls the up-and-down movement of the mounting plate 45, thereby controlling the up-and-down movement of the connecting rod 32. The mechanical gripper 33 moves up and down to contact the valve assembly, and the mechanical gripper 33 is controlled by the control motor 46 to clamp the valve assembly. A guide block 17 is provided on one side of the fixed plate 22, and a support rod 7 is provided on the side of the guide block 17 away from the fixed plate 22. The support rod 7 is connected to the main body 1 of the device. A connecting block 20 is provided on the fixed plate 22 in conjunction with the guide block 17. A clamping plate 21 is fixedly provided on one side of the connecting block 20. A pair of stepper motors 18 are symmetrically arranged at both ends of the guide block 17. A rotating shaft 19 is rotatably arranged between the stepper motors 18. The rotating shaft 19 passes through the clamping plate 21 and is configured to cooperate with it. The stepper motors 18 drive the rotating shaft 19 to rotate, thereby driving the clamping plate 21 to move. The movement of the clamping mechanism, in turn, causes the fixed plate 22 to move back and forth, controlling the clamping device to move back and forth. Furthermore, a fourth conveyor belt 39 is provided on one side of the device support plate 51, and a second support plate 37 is provided on the device body 1 in conjunction with the fourth conveyor belt 39. A guide plate 38 is provided on the side of the second support plate 37 away from the fourth conveyor belt 39, and a defective product collection groove 5 is provided on the outside of the device body 1 in conjunction with the guide plate 38. Thus, the clamping mechanism is controlled to move back and forth by the stepper motor 18, which in turn drives the mechanical gripper 33 to move. The mechanical gripper 33 moves the air valve assembly above the third conveyor belt 34, the detection placement groove 16, the fourth conveyor belt 39, and the guide plate 38, and performs different controls on the air valve assembly according to different situations.

[0039] Based on the above structure, an air hole 41 is provided at the bottom of the detection placement slot 16, and a connector 42 is provided at the bottom of the detection placement slot 16 in conjunction with the air hole 41. An external pressurization or negative pressure device is connected through the connector 42 to detect the air valve assembly. Several indicator lights 14 are provided on the device support plate 51 in conjunction with several detection placement slots 16, and the detection status is displayed through the indicator lights 14.

[0040] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, but such modifications, substitutions, and variations are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A dual-position airtightness testing device for a valve, comprising a main body (1), characterized in that: A pair of airtightness detection devices (6) are symmetrically arranged at an oblique angle on the main body (1) of the device. A control device (8) is arranged between the pair of airtightness detection devices (6). A feeding device is arranged on the side of the airtightness detection device (6) close to the other airtightness detection device (6). A conveying device (2) is arranged on one side of the main body (1) in conjunction with the feeding device. A discharge trough (3) is arranged on one side of the main body (1) in conjunction with the conveying device (2). Several air valve assemblies are placed in the discharge trough (3). The bottom of the discharge trough (3) is equipped with... The material conveying device (2) includes a first conveyor belt (11) with several support frames (4). Several second partition plates (52) are provided on the first conveyor belt (11). The first conveyor belt (11) is positioned at a certain angle within the discharge trough (3). A support connecting plate (48) is positioned at a certain angle within the discharge trough (3) to cooperate with the first conveyor belt (11). A pair of first drive shafts (10) are symmetrically located at both ends of the first conveyor belt (11). The first drive shafts (10) are rotatably connected to the support connecting plate (48). The top of the supporting connecting plate (48) is provided with a part guide channel (49) in conjunction with the first conveyor belt (11). A first conveyor trough (24) is provided on one side of the discharge trough (3). The first conveyor trough (24) is located above the discharge trough (3) and is parallel to the discharge trough (3). A second conveyor trough (29) is provided at one end of the first conveyor trough (24) near the part guide channel (49). The second conveyor trough (29) is connected to the outlet of the part guide channel (49). The material trough (29) and the support connecting plate (48) are set at the same angle. The second material trough (29) is set in an "L" shape. The side of the second material trough (29) close to the support connecting plate (48) is connected to the support connecting plate (48) in an "L" shape opening direction. A partition block (28) is set at the connection between the first material trough (24) and the second material trough (29). A screening groove (26) is opened on the first material trough (24). A limit plate (27) is set in the first material trough (24) in conjunction with the screening groove (26).

2. The dual-position airtightness testing device for a gas valve according to claim 1, characterized in that: The other end of the first feeding trough (24) away from the part guide channel (49) extends to the top of the device body (1). A shelf (50) is provided on the device body (1) in conjunction with the discharge port of the first feeding trough (24). A baffle (13) is provided on the shelf (50) at a distance from one end of the discharge port of the first feeding trough (24). A first cylinder (12) is provided on the shelf (50). A push plate (25) is connected to the side of the first cylinder (12) near the baffle (13). The width of the push plate (25) is equal to the distance between the discharge port of the first feed trough (24) and the baffle (13).

3. The dual-position airtightness testing device for a gas valve according to claim 2, characterized in that: A feeding device is provided on the side of the shelf (50) away from the first cylinder (12). The feeding device includes a third conveyor belt (34). A first support plate (35) and a third support plate (40) are symmetrically arranged on both sides of the third conveyor belt (34). A second guide shaft (36) is symmetrically arranged at both ends inside the third conveyor belt (34). A plurality of first partition plates (47) are provided on the third conveyor belt (34). The second guide shaft (36) is rotatably connected to the first support plate (35) and the third support plate (40). A device support plate (51) is provided on the side of the third support plate (40) away from the third conveyor belt (34). A plurality of detection placement slots (16) are provided on the device support plate (51).

4. The dual-position airtightness testing device for a gas valve according to claim 3, characterized in that: A fourth conveyor belt (39) is provided on one side of the device support plate (51). A second support plate (37) is provided on the device body (1) in conjunction with the fourth conveyor belt (39). A guide plate (38) is provided on the side of the second support plate (37) away from the fourth conveyor belt (39). A defective product collection trough (5) is provided on the outside of the device body (1) in conjunction with the guide plate (38).

5. The dual-position airtightness testing device for a gas valve according to claim 3, characterized in that: A clamping mechanism is provided above several of the detection placement slots (16). The clamping mechanism includes a symmetrically arranged fixed plate (22). An installation plate (45) is movably arranged inside the fixed plate (22). Several connecting rods (32) are provided at the bottom of the installation plate (45) corresponding to several detection placement slots (16). A connecting rod (44) is provided at the top of the installation plate (45). The connecting rod (44) extends to the outside of the fixed plate (22) and connects to a second cylinder (23). A guide groove (43) is provided on the inner wall of the fixed plate (22) in conjunction with the installation plate (45). A mechanical gripper (33) is provided at the bottom of the connecting rod (32). A control motor (46) is provided on the installation plate (45) in conjunction with the mechanical gripper (33).

6. The dual-position airtightness testing device for a gas valve according to claim 5, characterized in that: A guide block (17) is provided on one side of the fixed plate (22). A support rod (7) is provided on the side of the guide block (17) away from the fixed plate (22). The support rod (7) is connected to the main body (1) of the device. A connecting block (20) is provided on the fixed plate (22) in conjunction with the guide block (17). A card plate (21) is fixedly provided on one side of the connecting block (20). A pair of stepper motors (18) are symmetrically arranged at both ends of the guide block (17). A rotating shaft (19) is rotatably arranged between the stepper motors (18). The rotating shaft (19) passes through the card plate (21).

7. The dual-position airtightness testing device for a gas valve according to claim 3, characterized in that: The bottom of the detection placement slot (16) is provided with an air hole (41), and the bottom of the detection placement slot (16) is provided with a connector (42) in conjunction with the air hole (41). The device support plate (51) is provided with several indicator lights (14) in conjunction with several detection placement slots (16).

8. The dual-position airtightness testing device for a gas valve according to claim 1, characterized in that: The valve assembly consists of a first valve body (9) and a second valve body (15). The first conveying trough (24) and the second conveying trough (29) are covered with a second conveying belt (30). A pair of first guide shafts (31) are provided inside the first conveying trough (24) and the second conveying trough (29) in conjunction with the second conveying belt (30).

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