Use method for automobile part spraying air valve

Abstract

The invention belongs to the technical field of automobile spraying, and provides a use method of an air valve for spraying automobile parts, which comprises the following steps: step S1, a shell is fixedly mounted at a set position and is connected with a pipeline; s2, during use, a first rotating power part drives a rotating shaft to rotate, the rotating shaft drives a rotating plate to rotate in the direction away from a supporting plate, the end, away from the rotating shaft, of the rotating plate firstly leaves the supporting plate and a baffle, the rotating plate does not close the supporting plate any more, and air passes through a gap between the rotating plate and the supporting plate; the air volume is adjusted by controlling the rotating angle of the rotating plate. Compared with the prior art, the sealing device has the following beneficial effects that in the rotating process of the rotating plate, the sealing position of the rotating plate cannot be rubbed with the supporting plate or the inner wall of the shell, the sealing position of the supporting plate cannot be rubbed, and air leakage is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile spraying, and in particular relates to a method for using an air valve for spraying automobile parts. Background Art

[0002] A fully automated coating line for automotive parts is a highly efficient industrial device used for coating automotive parts. Its primary function is to use automated equipment and systems to perform spray painting and other surface treatments on automotive parts, improving their corrosion resistance, aesthetics, and other properties.

[0003] When spraying automobile parts, different parts require different spraying air volume and pressure. Generally, the air volume and pressure of the spraying are controlled by adjusting the size of the air flow through the air valve. The sealing performance of the existing air valve after closing during use is poor. In response to the above technical problems, the document with patent announcement number CN116499093A discloses an air valve structure and a purification device having the air valve structure. When the air valve plate is rotated and closed during use, one end of the air valve plate and the sealing gasket fit together to increase the sealing performance, while the other end of the air valve plate fits together and limits each other, but the upper and lower ends of the air valve plate are in contact with the inner wall of the air valve frame. During long-term use, the upper and lower ends of the air valve plate and the inner wall of the air valve frame will cause wear due to friction, resulting in the upper and lower ends of the air valve plate and the inner wall of the air valve frame cannot be completely sealed, thereby causing air leakage and the inability to accurately control the air flow. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for using a spray air valve for automobile parts, aiming to solve the technical problem of air leakage caused by wear of the air valve sealing structure in the prior art.

[0005] The present invention is implemented as follows: a method for using a spray air valve for automobile parts, comprising the following steps:

[0006] Step S1: Fix the housing to a set position and connect it to the pipeline;

[0007] Step S2: When in use, the first rotating power member drives the rotating shaft to rotate, and the rotating shaft drives the rotating plate to rotate in a direction away from the support plate. The end of the rotating plate away from the rotating shaft first leaves the support plate and the baffle plate, and the rotating plate no longer closes the support plate. Air passes through the gap between the rotating plate and the support plate, and the air volume is adjusted by controlling the rotation angle of the rotating plate;

[0008] Step S3: When not in use, the first rotating power member drives the rotating plate to rotate in the opposite direction until the rotating plate is parallel to the base plate, the rotating plate is fully in contact with the support plate, and at the same time, the end of the rotating plate away from the rotating shaft is in contact with the baffle. Under the action of the pressure of the first elastic member, the support plate is completely pressed against the rotating plate, thereby achieving a complete seal of the support plate;

[0009] The top end of the lifting link is connected with the base plate of the second end of the support frame, and the bottom end of the lifting link is connected with the support frame by the spring.

[0010] Preferably, a guide plate is fixedly mounted on the side of the base plate close to the air inlet, and both ends of the guide plate are fixedly connected to the inner side wall of the base plate and the inner wall of the shell respectively.

[0011] Preferably, the cross section of the baffle is triangular, one of the corners of the baffle points to the air inlet of the shell, and a plane of the baffle contacts the rotating plate.

[0012] Preferably, two groups of closing plates are provided in the shell, the two groups of closing plates are distributed along the length direction of the rotating shaft and the two groups of closing plates are located on both sides of the rotating plate, and the closing plates are connected to the first telescopic member and the second telescopic member, the first telescopic member is fixedly connected to the inner wall of the shell and drives the closing plates to move along the length direction of the rotating shaft, and the second telescopic member is fixedly connected to the support plate and drives the closing plates to move along the length direction of the shell.

[0013] Preferably, a lifting plate is fixedly installed at the output end of the first telescopic member, and a connecting sleeve is connected to the lifting plate through a guide rod. The connecting sleeve is slidably connected to a connecting frame fixedly installed on the closed plate. The connecting frame is U-shaped and the connecting sleeve is connected to the connecting frame parallel to the middle section of the closed plate.

[0014] Preferably, a first pressure sensor is fixedly mounted on the surface of the lifting plate close to the connecting sleeve, a second elastic member is fixedly connected to the surface of the first pressure sensor close to the connecting sleeve, and one end of the second elastic member away from the first pressure sensor is fixedly connected to the connecting sleeve.

[0015] Preferably, a frame-shaped bracket is provided at one end of the connecting frame close to the support plate, a slide is slidably mounted on the bracket, a support rod is fixedly mounted on the skateboard, an end of the support rod away from the skateboard is fixedly connected to the connecting frame, the support rod is slidably connected to the bracket, a third elastic member is fixedly mounted on the surface of the skateboard close to the connecting frame, an end of the third elastic member away from the skateboard is fixedly connected to a second pressure sensor fixedly mounted in the bracket, and the bracket is connected to the second telescopic member.

[0016] Preferably, a connecting plate is fixedly mounted on the output end of the second telescopic member, a vertical plate is fixedly mounted on the bracket, and the vertical plate is slidably connected to the connecting plate.

[0017] Preferably, the two corners of the closing plate away from the support plate are rotatably installed with cleaning shafts, the cleaning shafts are located between the two groups of closing plates, and the cleaning plates are fixedly installed on the cleaning shafts. The cleaning plates are in sliding contact with the closing plates, and the two groups of cleaning shafts located on the same straight line are fixedly connected by a second telescopic rod, and one group of closing plates is fixedly installed with a second rotating power component that drives the cleaning shafts to rotate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The support plate is sealed or opened by the rotating plate and the baffle. During the rotation of the rotating plate, the sealing position of the rotating plate will not rub against the support plate or the inner wall of the shell, and the sealing position of the support plate will not generate friction. This can ensure the sealing effect of the rotating plate and the sealing position of the support plate, avoid air leakage, ensure stable control of the air volume, and help improve the subsequent spraying quality.

[0020] 2. When the rotating plate is opened and adjusted, the rotating plate is always in contact with the closing plate, and the closing plate is always in contact with the support plate. The support plate and the rotating plate are always in contact under the pressure of the first elastic member, so that the air can only flow out from the outlet surrounded by the closing plate and the rotating plate through the closing plate, avoiding the air from flowing out in other directions from the gap between the rotating plate and the support plate, ensuring that the air flows in only one direction, avoiding air flow turbulence, improving the stability of airflow control, and helping to improve the quality of subsequent spraying.

[0021] 3. The cleaning shaft is driven to rotate by the second rotating power member. The two groups of cleaning shafts located on the same straight line rotate synchronously under the action of the second telescopic rod, so that the cleaning plate rotates inward. When the cleaning plate rotates, its two sides respectively scrape and clean the surfaces of the closing plate and the rotating plate that are in contact with each other, so that the debris generated by friction on the surfaces of the closing plate and the rotating plate that are in contact with each other is scraped off and then left under the drive of the air, thereby ensuring the cleanliness of the surfaces of the closing plate and the rotating plate that are in contact with each other, further improving the sealing of the closing plate and the rotating plate, and further improving the stability of airflow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic cross-sectional structural diagram of the present invention.

[0024] Figure 3 Schematic diagram of the structure inside the shell of the present invention.

[0025] Figure 4 Schematic diagram of the structure of the substrate in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the closing plate in the present invention.

[0027] Figure 6 for Figure 2 A magnified schematic diagram of the A1 region in the middle.

[0028] Figure 7 for Figure 2 A magnified schematic diagram of the A2 region in the middle.

[0029] Figure 8 for Figure 5 Schematic diagram of the enlarged A3 region.

[0030] In the accompanying drawings: 1. Shell; 2. Connecting ear plate; 3. Base plate; 4. Guide plate; 5. Telescopic tube; 6. Support plate; 7. First telescopic rod; 8. First elastic member; 9. Baffle; 10. Rotating shaft; 11. First rotating power member; 12. Rotating plate; 13. First telescopic member; 14. Lifting plate; 15. Connecting sleeve; 16. Guide rod; 17. Second elastic member; 18. First pressure sensor; 19. Connecting frame; 20. Closing plate; 21. Second telescopic member; 22. Connecting plate; 23. Bracket; 24. Vertical plate; 25. Second pressure sensor; 26. Third elastic member; 27. Slide plate; 28. Support rod; 29. Cleaning shaft; 30. Cleaning plate; 31. Second telescopic rod; 32. Second rotating power member. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0033] like Figure 1-Figure 4 As shown, the present invention provides a method for using a spray air valve for automobile parts, which includes the following steps:

[0034] Step S1: The housing 1 is fixedly installed at a set position and connected to the pipeline.

[0035] Step S2: When in use, the first rotating power member 11 drives the rotating shaft 10 to rotate, and the rotating shaft 10 drives the rotating plate 12 to rotate in the direction away from the support plate 6. The end of the rotating plate 12 away from the rotating shaft 10 first leaves the support plate 6 and the baffle 9. The rotating plate 12 no longer closes the support plate 6, and the air passes through the gap between the rotating plate 12 and the support plate 6. The air volume is adjusted by controlling the rotation angle of the rotating plate 12.

[0036] Step S3: When not in use, the first rotating power member 11 drives the rotating plate 12 to rotate in the opposite direction until the rotating plate 12 is parallel to the base plate 3, and the rotating plate 12 is completely in contact with the support plate 6. At the same time, the end of the rotating plate 12 away from the rotating shaft 10 is in contact with the baffle 9. Under the action of the pressure of the first elastic member 8, the support plate 6 is completely pressed against the rotating plate 12, thereby achieving complete sealing of the support plate 6.

[0037] Both ends of the shell 1 are fixedly installed with connecting ear plates 2, a frame-shaped base plate 3 is fixedly installed in the shell 1, the outer side of the base plate 3 is fixedly connected to the inner wall of the shell 1, and the side of the base plate 3 close to the air inlet is fixedly installed with a guide plate 4, and the two ends of the guide plate 4 are respectively fixedly connected to the inner side wall of the base plate 3 and the inner wall of the shell 1, the end of the base plate 3 away from the air inlet is fixedly connected to a telescopic tube 5, and the end of the telescopic tube 5 away from the base plate 3 is fixedly connected to a frame-shaped support plate 6, multiple groups of first telescopic rods 7 are fixedly connected between the support plate 6 and the base plate 3, and multiple groups of first elastic members 8 are fixedly installed on the support plate 6. The end of the first elastic member 8 away from the support plate 6 is fixedly connected to the base plate 3, and two A group of rotating shafts 10 are distributed on both sides of the support plate 6, and a first rotating power member 11 that drives the rotating shaft 10 to rotate is fixedly installed in the shell 1. A rotating plate 12 used in conjunction with the support plate 6 is fixedly installed on the rotating shaft 10, and a baffle 9 used in conjunction with the rotating plate 12 is fixedly installed in the middle of the support plate 6. When the rotating plate 12 is parallel to the base plate 3, the rotating plate 12 is completely in contact with the support plate 6 and a gap is provided at the ends of the two groups of rotating plates 12. At the same time, the end of the rotating plate 12 away from the rotating shaft 10 is in contact with the baffle 9, the first elastic member 8 is in a compressed state, the cross-section of the baffle 9 is triangular and one of the corners of the baffle 9 points to the air inlet of the shell 1, and a plane of the baffle 9 is in contact with the rotating plate 12.

[0038] In actual application of this embodiment, the first rotating power member 11 drives the rotating shaft 10 to rotate, so that the rotating plate 12 rotates in the direction away from the support plate 6. At this time, the end of the rotating plate 12 away from the rotating shaft 10 first leaves the support plate 6 and the baffle 9, and the rotating plate 12 no longer closes the support plate 6. Under the action of the first elastic member 8, the side of the support plate 6 maintains contact with the rotating plate 12, and air can pass through the gap between the rotating plate 12 and the support plate 6 to achieve air circulation. By changing the rotation angle of the rotating plate 12, the size of the gap between the rotating plate 12 and the support plate 6 is controlled, thereby adjusting the amount of air passing through. The triangular cross-section of the baffle 9 is set to reduce the energy loss when the air collides with the baffle 9. The air is introduced into the telescopic tube 5 through the guide plate 4, reducing the impact loss of the air with the internal components of the shell 1, and further reducing the energy loss of the air after entering the shell 1.

[0039] When not in use, the first rotating power part 11 drives the rotating plate 12 to rotate in the opposite direction until the rotating plate 12 is parallel to the base plate 3. When the rotating plate 12 rotates in the opposite direction, it pushes the support plate 6 to reset and compresses the first elastic part 8. When the rotating plate 12 is parallel to the base plate 3, the rotating plate 12 is completely in contact with the support plate 6. At the same time, the end of the rotating plate 12 away from the rotating shaft 10 is in contact with the baffle 9, and the first elastic part 8 is in a compressed state. At this time, under the action of the pressure of the first elastic part 8, the support plate 6 is completely pressed on the rotating plate 12, thereby achieving complete sealing of the support plate 6. The support plate 6 is sealed or opened by the rotating plate 12 and the baffle 9. During the rotation of the rotating plate 12, its sealing position will not rub against the support plate 6 or the inner wall of the shell 1, and the sealing position of the support plate 6 will not generate friction, which can ensure the sealing effect of the sealing position of the rotating plate 12 and the support plate 6, avoid air leakage, ensure stable control of the air volume, and help improve the subsequent spraying quality.

[0040] In an example of this embodiment, the first rotating power component 11 is a first motor, and of course it can also be other components that can output rotational power, such as a hydraulic motor. The rotating plate 12 is driven to rotate by the first motor. The first elastic component 8 is a first spring, and of course it can also be other elastic components such as an elastic ball. The support plate 6 is applied with thrust through the compression of the first spring.

[0041] like Figure 2-Figure 8 As shown, a method for using a spray air valve for automotive parts provided by the present invention is provided. Two groups of closing plates 20 are arranged in the shell 1. The two groups of closing plates 20 are distributed along the length direction of the rotating shaft 10 and the two groups of closing plates 20 are located on both sides of the rotating plate 12. The closing plates 20 are connected to the first telescopic member 13 and the second telescopic member 21. The first telescopic member 13 is fixedly connected to the inner wall of the shell 1 and drives the closing plates 20 to move along the length direction of the rotating shaft 10. The second telescopic member 21 is fixedly connected to the support plate 6 and drives the closing plates 20 to move along the length direction of the shell 1.

[0042] A lifting plate 14 is fixedly mounted on the output end of the first telescopic member 13, and a connecting sleeve 15 is connected to the lifting plate 14 through a guide rod 16. The connecting sleeve 15 is slidably connected to a connecting frame 19 fixedly mounted on the closing plate 20. The connecting frame 19 is U-shaped and the connecting sleeve 15 is connected to the connecting frame 19 parallel to the middle section of the closing plate 20.

[0043] A first pressure sensor 18 is fixedly installed on the surface of the lifting plate 14 close to the connecting sleeve 15 . A second elastic member 17 is fixedly connected to the surface of the first pressure sensor 18 close to the connecting sleeve 15 . The end of the second elastic member 17 away from the first pressure sensor 18 is fixedly connected to the connecting sleeve 15 .

[0044] A frame-shaped bracket 23 is provided at one end of the connecting frame 19 close to the support plate 6, a slide plate 27 is slidably mounted on the bracket 23, a support rod 28 is fixedly mounted on the skateboard 27, an end of the support rod 28 away from the skateboard 27 is fixedly connected to the connecting frame 19, the support rod 28 is slidably connected to the bracket 23, a third elastic member 26 is fixedly mounted on the surface of the skateboard 27 close to the connecting frame 19, an end of the third elastic member 26 away from the skateboard 27 is fixedly connected to a second pressure sensor 25 fixedly mounted in the bracket 23, and the bracket 23 is connected to the second telescopic member 21.

[0045] A connecting plate 22 is fixedly mounted on the output end of the second telescopic member 21 , and a vertical plate 24 is fixedly mounted on the bracket 23 . The vertical plate 24 is slidably connected to the connecting plate 22 .

[0046] When the second pressure sensor 25 reads the set value, it stops moving. At this time, the closing plate 20 is in contact with the support plate 6 and the pressure is small. Then, the second telescopic member 21 contracts and drives the connecting plate 22 to move in the direction close to the support plate 6. The connecting plate 22 drives the bracket 23 to move through the vertical plate 24. The movement of the bracket 23 will compress the third elastic member 26, and then the closing plate 20 can be pulled in the direction close to the support plate 6 through the slide plate 27, the support rod 28, and the connecting frame 19 until the closing plate 20 is in contact with the support plate 6. When the reading of the second pressure sensor 25 reaches the set value, it stops moving. At this time, the closing plate 20 is in contact with the support plate 6 and the pressure is small. Then, the rotating plate 12 can be opened and the opening size can be adjusted. After the first telescopic member 13 is completed, the first telescopic member 13 continues to extend, and the second telescopic member 21 continues to contract, so that the first pressure sensor 18 and the second pressure sensor 25 reach another set threshold value. At this time, the pressure between the closing plate 20 and the rotating plate 12 and the support plate 6 is relatively high, further improving the sealing of the closing plate 20 and the rotating plate 12 and the support plate 6. During subsequent adjustment, the closing plate 20 and the rotating plate 12 and the support plate 6 are restored to a smaller pressure. When the rotating plate 12 is opened and adjusted, the rotating plate 12 is always in contact with the closing plate 20. At the same time, the closing plate 20 is always in contact with the support plate 6, and the support plate 6 and the rotating plate 12 are always in contact under the pressure of the first elastic member 8, so that the air can only flow out from the outlet surrounded by the closing plate 20 and the rotating plate 12 through the closing plate 20, avoiding the air from flowing out in other directions from the gap between the rotating plate 12 and the support plate 6, ensuring that the air flows only in one direction, avoiding air flow turbulence, improving the stability of airflow control, and being conducive to improving the quality of subsequent spraying.

[0047] In one embodiment of the present invention, the first telescopic member 13 and the second telescopic member 21 are respectively the first electric telescopic rod and the second electric telescopic rod, and of course they can also be other components that can actively change the length, such as a hydraulic cylinder. The lifting plate 14 is driven to move by the first electric telescopic rod, and the connecting plate 22 is driven to move by the second electric telescopic rod. The second elastic member 17 and the third elastic member 26 are respectively the second spring and the third spring, and of course they can also be other elastic components such as an elastic ball. The first pressure sensor 18 is compressed by the second spring, and the second pressure sensor 25 is compressed by the third spring.

[0048] like Figure 3 、 Figure 5As shown, a method for using a spray air valve for automotive parts provided by the present invention is provided, wherein the two corners of the closing plate 20 away from the support plate 6 are rotatably installed with a cleaning shaft 29, the cleaning shaft 29 is located between the two groups of closing plates 20, and a cleaning plate 30 is fixedly installed on the cleaning shaft 29. The cleaning plate 30 is in sliding contact with the closing plate 20, and the two groups of cleaning shafts 29 located on the same straight line are fixedly connected by a second telescopic rod 31, and one group of closing plates 20 is fixedly installed with a second rotating power member 32 that drives the cleaning shaft 29 to rotate.

[0049] When the cleaning plate 30 is in operation, the cleaning shaft 29 is rotated to move away from the support plate 6, and the cleaning shaft 29 is rotated to move away from the support plate 6. When the cleaning plate 30 is in operation, the cleaning shaft 29 is rotated to move away from the support plate 6, and the cleaning shaft 29 is rotated to move away from the support plate 6. The cleaning shaft 29 is rotated to move away from the support plate 6, and the cleaning shaft 29 is rotated to move away from the support plate 6. The cleaning shaft 29 is rotated to move away from the support plate 6, and the cleaning shaft 29 is rotated to move away from the support plate 6. The cleaning shaft 29 is rotated to move away from the support plate 6, and the cleaning shaft 29 is rotated to move away from the support plate 6. The cleaning shaft 29 is rotated to move away from the support plate 6, and the cleaning shaft 29 is rotated to move away from the support plate 6.

[0050] In one embodiment of the present invention, the second rotating power component 32 is a second motor, and of course it can also be other components that can output rotational power, such as a hydraulic motor. The second motor drives the cleaning plate 30 to rotate to achieve cleaning of the closing plate 20 and the rotating plate 12.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for using a spray air valve for automobile parts, characterized in that: It includes the following steps: Step S1: fixing the housing (1) to a set position and connecting it to the pipeline; Step S2: When in use, the first rotating power member (11) drives the rotating shaft (10) to rotate, and the rotating shaft (10) drives the rotating plate (12) to rotate in a direction away from the support plate (6). The end of the rotating plate (12) away from the rotating shaft (10) first leaves the support plate (6) and the baffle (9), and the rotating plate (12) no longer closes the support plate (6). Air passes through the gap between the rotating plate (12) and the support plate (6), and the air volume is adjusted by controlling the rotation angle of the rotating plate (12); Step S3: When not in use, the first rotating power member (11) drives the rotating plate (12) to rotate in the opposite direction until the rotating plate (12) is parallel to the base plate (3), the rotating plate (12) is completely in contact with the support plate (6), and at the same time, the end of the rotating plate (12) away from the rotating shaft (10) is in contact with the baffle (9), and under the action of the pressure of the first elastic member (8), the support plate (6) is completely pressed against the rotating plate (12), thereby achieving complete sealing of the support plate (6); Both ends of the shell (1) are fixedly mounted with connecting ear plates (2), a frame-shaped base plate (3) is fixedly mounted inside the shell (1), the outer side surface of the base plate (3) is fixedly connected to the inner wall of the shell (1), the end of the base plate (3) away from the air inlet is fixedly connected to a telescopic tube (5), the end of the telescopic tube (5) away from the base plate (3) is fixedly connected to a frame-shaped support plate (6), multiple groups of first telescopic rods (7) are fixedly connected between the support plate (6) and the base plate (3), multiple groups of first elastic members (8) are fixedly mounted on the support plate (6), the end of the first elastic member (8) away from the support plate (6) is fixedly connected to the base plate (3), and the shell (1) is rotatably mounted. There are two groups of rotating shafts (10) distributed on both sides of the support plate (6), a first rotating power member (11) for driving the rotating shaft (10) to rotate is fixedly installed in the shell (1), a rotating plate (12) used in conjunction with the support plate (6) is fixedly installed on the rotating shaft (10), and a baffle (9) used in conjunction with the rotating plate (12) is fixedly installed in the middle of the support plate (6). When the rotating plate (12) is parallel to the base plate (3), the rotating plate (12) is completely in contact with the support plate (6) and a gap is provided at the ends of the two groups of rotating plates (12). At the same time, the end of the rotating plate (12) away from the rotating shaft (10) is in contact with the baffle (9), and the first elastic member (8) is in a compressed state.

2. The method for using a spray air valve for automobile parts according to claim 1, characterized in that: A guide plate (4) is fixedly mounted on the side of the base plate (3) close to the air inlet, and both ends of the guide plate (4) are fixedly connected to the inner side wall of the base plate (3) and the inner wall of the housing (1), respectively.

3. The method for using a spray air valve for automobile parts according to claim 1, characterized in that: The baffle (9) has a triangular cross-section, one corner of the baffle (9) points toward the air inlet of the housing (1), and a plane of the baffle (9) contacts the rotating plate (12).

4. The method for using a spray air valve for automobile parts according to claim 1, characterized in that: Two groups of closing plates (20) are provided in the shell (1), the two groups of closing plates (20) are distributed along the length direction of the rotating shaft (10) and the two groups of closing plates (20) are located on both sides of the rotating plate (12), the closing plates (20) are connected to a first telescopic member (13) and a second telescopic member (21), the first telescopic member (13) is fixedly connected to the inner wall of the shell (1) and drives the closing plates (20) to move along the length direction of the rotating shaft (10), and the second telescopic member (21) is fixedly connected to the support plate (6) and drives the closing plates (20) to move along the length direction of the shell (1).

5. The method for using a spray air valve for automobile parts according to claim 4, characterized in that: A lifting plate (14) is fixedly mounted on the output end of the first telescopic member (13); a connecting sleeve (15) is connected to the lifting plate (14) via a guide rod (16); the connecting sleeve (15) is slidably connected to a connecting frame (19) fixedly mounted on the closing plate (20); the connecting frame (19) is U-shaped, and the connecting sleeve (15) is connected to the connecting frame (19) parallel to the middle section of the closing plate (20).

6. The method for using a spray air valve for automobile parts according to claim 5, characterized in that: A first pressure sensor (18) is fixedly mounted on the surface of the lifting plate (14) close to the connecting sleeve (15), a second elastic member (17) is fixedly connected to the surface of the first pressure sensor (18) close to the connecting sleeve (15), and an end of the second elastic member (17) away from the first pressure sensor (18) is fixedly connected to the connecting sleeve (15).

7. The method for using a spray air valve for automobile parts according to claim 5, characterized in that: A frame-shaped bracket (23) is provided at one end of the connecting frame (19) close to the support plate (6), a slide plate (27) is slidably mounted on the bracket (23), a support rod (28) is fixedly mounted on the slide plate (27), an end of the support rod (28) away from the slide plate (27) is fixedly connected to the connecting frame (19), the support rod (28) is slidably connected to the bracket (23), a third elastic member (26) is fixedly mounted on the surface of the slide plate (27) close to the connecting frame (19), an end of the third elastic member (26) away from the slide plate (27) is fixedly connected to a second pressure sensor (25) fixedly mounted in the bracket (23), and the bracket (23) is connected to the second telescopic member (21).

8. The method for using a spray air valve for automobile parts according to claim 7, characterized in that: A connecting plate (22) is fixedly mounted on the output end of the second telescopic member (21), a vertical plate (24) is fixedly mounted on the bracket (23), and the vertical plate (24) is slidably connected to the connecting plate (22).

9. The method for using a spray air valve for automobile parts according to claim 4, characterized in that: The two corners of the closing plate (20) away from the support plate (6) are both rotatably mounted with a cleaning shaft (29), the cleaning shaft (29) is located between the two groups of closing plates (20), a cleaning plate (30) is fixedly mounted on the cleaning shaft (29), the cleaning plate (30) is in sliding contact with the closing plate (20), the two groups of cleaning shafts (29) located on the same straight line are fixedly connected by a second telescopic rod (31), and a second rotating power member (32) for driving the cleaning shaft (29) to rotate is fixedly mounted on one group of closing plates (20).

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