Rotary inflation valve with pressure maintaining function

Abstract

The invention relates to the technical field of valve devices, in particular to a rotary inflation valve with a pressure maintaining function, which comprises a support, a valve seat and a valve body, and further comprises an end cover, an air inlet joint, a first air chamber, a diaphragm, a second air chamber, a second air passage, an elastic component and an air outlet joint, the valve seat and the valve body are sequentially arranged at the top of the support, and the end cover is rotatably arranged at the top of the valve body; the first air chamber is vertically formed in the inner center of the end cover, the air inlet connector is arranged on the peripheral face of the end cover, the second air chamber is symmetrically formed in the valve seat, the second air channel is arranged in the valve seat from left to right, the diaphragm is elastically arranged in the valve seat, and the elastic assembly is arranged at the bottom of the diaphragm. According to the rotary inflation valve with the pressure maintaining function, only the support needs to be designed to be matched with a tire, the production difficulty is lowered, the production efficiency is improved, the rotary inflation valve can adapt to various scenes, and the using economical efficiency of the rotary inflation valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve devices, and in particular to a rotary inflation valve with a pressure-maintaining function. Background Art

[0002] A rotary inflation valve is a device used to control the flow of gas into and out of a closed space. The valve is characterized by a rotatable valve core that controls the flow and closing of the medium through rotation. Rotary inflation valves are used in various pneumatic equipment, inflation equipment, automobile brake systems, and tires.

[0003] The air intake method of the transmission wheel rim system is usually a built-in charging and discharging system. The built-in system requires the installation of an oil and gas seal between the wheel hub and the steering knuckle, and the arrangement of air duct holes in the wheel hub and the steering knuckle, and adaptation processing for the arrangement of the rotary charging valve, which increases the difficulty of production and reduces production efficiency. In addition, the rotary charging valve is usually arranged on the wheel hub and the steering knuckle, and the diameter is usually large. Therefore, the oil and gas seal wears more severely, resulting in a reduced service life of the rotary charging valve. At the same time, the usage scenario is relatively single. Summary of the invention

[0004] The present invention provides a rotary inflation valve with a pressure maintaining function, aiming to solve the problems in the related art that the production of a built-in inflation and deflation system is more difficult and the production efficiency is reduced, which easily causes serious wear of the oil and gas seal, resulting in a reduced service life of the rotary inflation valve.

[0005] A rotary inflation valve with a pressure-maintaining function of the present invention comprises: a bracket, a valve seat and a valve body, wherein the valve seat and the valve body are sequentially arranged on the top of the bracket, and further comprises: an end cover, an air inlet joint, a first air chamber, a diaphragm, a second air chamber, a second air channel, an elastic component and an air outlet joint, wherein the end cover is rotatably arranged on the top of the valve body, the first air chamber is vertically opened at the inner center position of the end cover, the air inlet joint is arranged on the outer peripheral surface of the end cover, and the air inlet joint is connected with the first air chamber, the second air chamber is symmetrically opened inside the valve seat, and the first air chamber and the second air chamber are connected, so that gas can enter the first air chamber through the air inlet joint. and the interior of the second air chamber, the second air channel is arranged inside the valve seat from left to right, and the second air channel is opened in a T-shape, the bottom end of the T-shape is an air inlet, and the two ends of the T-shape are air outlets, the air outlet joint is arranged on the outer peripheral surface of the valve seat, and the air outlet joint is connected to the air outlet, the diaphragm is elastically arranged inside the valve seat, the elastic component is arranged at the bottom of the diaphragm, and the elastic component elastically supports the diaphragm upward, and when the gas is charged and discharged, the external high-pressure gas can squeeze the diaphragm through the first air chamber and the second air chamber, so that the diaphragm can stop sealing or detach from the bottom port of the second air chamber and the air inlet of the second air channel.

[0006] Preferably, a bearing is sleeved on the outer circumferential surface of the end cover, a support frame is provided inside the valve body, the support frame is used to support the bearing so that the end cover can rotate on the valve body, a dustproof sheet is provided on the top of the valve body, and an oil and gas seal is provided inside the valve body.

[0007] Preferably, the elastic component includes: a spring, a tray and a valve cover, the valve cover is arranged at the bottom of the valve seat, the spring is arranged on the inner bottom surface of the valve cover, the tray is arranged on the top of the spring, and the spring is used to elastically support the tray, and the top of the tray is connected to the bottom surface of the diaphragm so that the spring elastically supports the tray and the diaphragm.

[0008] Preferably, the second air channel is opened inside the valve seat, and both ends of the T-shaped transverse air channel extend to the outer peripheral surface of the valve seat. The outer peripheral surface of the valve seat is symmetrically provided with air outlet joints, and the air outlet joints correspond one-to-one to the two ends of the transverse air channel, and the air outlet joints are connected to the tire.

[0009] Preferably, a magnetic sealing piece is arranged on the top of the diaphragm, and magnetic pieces are also arranged on the two bottom end surfaces of the second air chamber, and the magnetic sealing piece abuts against the bottom magnetic piece of the second air chamber.

[0010] Preferably, a dustproof pad is arranged inside the valve seat, a dustproof cover is arranged at the bottom of the dustproof pad, and the dustproof pad and the dustproof cover are sleeved on the outer peripheral surface of the valve cover.

[0011] Preferably, a screw hole is provided at the bottom of the valve seat, and the bracket is fixed to the bottom of the valve seat by screws, and a plug is provided on the outer peripheral surface of the valve seat.

[0012] Preferably, the outer circumferential surface of the air outlet connector is provided with threads, the outer circumferential surface of the air outlet connector is provided with a nut, the air outlet connector is connected to the valve seat via threads, and the outer circumferential surface of the air outlet connector is provided with an external air source connector.

[0013] Preferably, a filter screen is disposed inside the first air chamber, and the filter screen is disposed in an arc-shaped protrusion.

[0014] The beneficial effects of the present invention are:

[0015] When the tire is inflated, the gas enters the interior of the first air chamber through the air inlet joint, and then enters the interior of the second air chamber through the first air chamber. As the gas continues to fill, the air pressure inside the second air chamber will increase and squeeze the diaphragm to move downward. The downward movement of the diaphragm causes the diaphragm to separate from the second air chamber and the lip of the second air channel, allowing the gas to pass through the bottom end of the second air chamber and enter the second air channel, and is transported into the tire through the air pipe of the air outlet joint nozzle to achieve inflation. When the tire is deflated, a section of high-pressure gas is transported through the first air chamber into the interior of the second air chamber, causing the high-pressure gas in the tire to flow toward the first air chamber and the air inlet joint, and the high-pressure gas in the tire is discharged to the atmosphere through the controller in the inflation and deflation system to achieve deflation. Therefore, there is no need to arrange a rotating air chamber air channel in the axle of the entire vehicle. Only a bracket needs to be designed to adapt to the tire, which reduces production difficulty and improves production efficiency.

[0016] The rotary inflation valve can be connected to two tires at the same time and has a pressure-maintaining function. The pressure-maintaining function means that when the inflation and deflation system is inflating and deflation, the system will exhaust the pressure in the pipeline, so that the spring under the diaphragm will reset, and the high-pressure gas at the tire end will be sealed at the bottom of the T-shaped vertical airway, which is suitable for multiple usage scenarios to improve the economic efficiency of the rotary inflation valve.

[0017] The number of components of the existing tire inflation and deflation system is simplified, and the size and the size of the internal arrangement are smaller, thereby ensuring the service life of the rotary inflation valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the first air chamber structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the valve seat structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the second air chamber structure of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the gas outlet joint of the present invention.

[0023] Reference numerals:

[0024] 10. Bracket; 11. Screw; 12. Screw hole; 21. End cover; 22. Dustproof sheet; 23. Bearing; 24. Valve body; 25. Oil and gas seal; 26. Filter; 27. First air chamber; 28. Air inlet connector; 30. Valve seat; 31. Diaphragm; 32. Magnetic sealing sheet; 33. Tray; 34. Spring; 35. Valve cover; 36. Dustproof cover; 37. Dustproof pad; 38. Plug; 39. Second air chamber; 40. Second air duct; 50. Air outlet connector; 51. Thread; 52. Nut; 53. External air source connector. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figures 1 to 5 As shown, a rotary inflation valve with a pressure-maintaining function of the present invention comprises: a bracket 10, a valve seat 30 and a valve body 24, wherein the valve seat 30 and the valve body 24 are sequentially arranged on the top of the bracket 10, and further comprises: an end cover 21, an air inlet connector 28, a first air chamber 27, a diaphragm 31, a second air chamber 39, a second air channel 40, an elastic component and an air outlet connector 50, wherein the end cover 21 is rotatably arranged on the top of the valve body 24, the first air chamber 27 is vertically opened at the inner center position of the end cover 21, the air inlet connector 28 is arranged on the outer peripheral surface of the end cover 21, and the air inlet connector 28 is communicated with the first air chamber 27 , so that the gas can enter the interior of the first air chamber 27 through the air inlet joint 28, the second air chamber 39 is symmetrically opened inside the valve seat 30, and the first air chamber 27 and the second air chamber 39 are communicated, the air outlet joint 50 is arranged on the outer peripheral surface of the valve seat 30, the diaphragm 31 is arranged inside the valve seat 30, and the diaphragm 31 is convex sheet-shaped, the second air channel 40 is arranged inside the valve seat 30 from left to right, the elastic component is arranged at the bottom of the diaphragm 31, and the elastic component elastically supports the diaphragm 31 upward, so that the diaphragm 31 stops and seals the second air chamber 39 and the bottom port of the second air channel 40.

[0027] When the tire is inflated, the gas enters the first air chamber 27 through the air inlet connector 28, and then enters the second air chamber 39 through the first air chamber 27. As the gas continues to fill, the air pressure inside the second air chamber 39 will increase and squeeze the diaphragm 31 to move downward. The downward movement of the diaphragm 31 causes the diaphragm 31 to separate from the second air chamber 39 and the lip of the second air duct 40, allowing the gas to pass through the bottom end of the second air chamber 39 and enter the second air duct 40, and be transported into the tire through the air outlet connector 50 nozzle air pipe to achieve inflation.

[0028] When the tire is deflated, a section of high-pressure gas is delivered through the first air chamber 27 into the interior of the second air chamber 39, pushing the diaphragm 31 downward and compressing the elastic member until the diaphragm 31 is separated from the second air chamber 39 and the lip of the second air duct 40. Since only a section of high-pressure gas is delivered to push the diaphragm 31 downward, the air pressure in the tire is greater than the air pressure in the pipeline, causing the high-pressure gas in the tire to flow to the first air chamber 27 and the air inlet connector 28, and the high-pressure gas in the tire is discharged to the atmosphere through the controller in the inflation and deflation system, thereby achieving deflation.

[0029] To further explain how to inflate and deflate the rotary inflation valve and ensure the service life of the rotary inflation valve, a detailed description will be given below.

[0030] like Figure 1 to Figure 2 As shown, the end cover 21 is composed of a disc and a cylinder, so that the end cover 21 is in the shape of a bolt, and a bearing 23 is sleeved on the outer circumferential surface of the cylinder. A support frame is arranged inside the valve body 24, and the support frame is used to support the bearing 23 so that the end cover 21 can rotate on the valve body 24, thereby avoiding interference with the rotary inflation valve when the wheel rotates. A dustproof sheet 22 is arranged on the top of the valve body 24, and the dustproof sheet 22 is annular, thereby avoiding mud and sand from entering the interior of the valve body 24, avoiding the bearing 23 from getting stuck or stuck, and ensuring the service life of the valve body 24. An oil and gas seal 25 is arranged inside the valve body 24, and the inner ring of the oil and gas seal 25 is sealed and connected to the outer circumferential surface of the bottom end of the cylinder of the end cover 21, and the oil and gas seal 25 can prevent gas leakage.

[0031] like Figure 2 As shown, a filter screen 26 is arranged inside the first air chamber 27, and the filter screen 26 is arranged in an arc-shaped protrusion. The filter screen 26 can filter impurities in the gas. Since the filter screen 26 is arranged in an arc-shaped protrusion, some filtered impurities can be accumulated on both sides, ensuring that the gas can pass through the filter screen 26 stably, while avoiding frequent replacement of the filter screen 26, reducing the manual workload.

[0032] like Figure 3 to Figure 4As shown, the elastic component includes: a spring 34, a tray 33 and a valve cover 35, the valve cover 35 is arranged at the bottom of the valve seat 30, the spring 34 is arranged on the inner bottom surface of the valve cover 35, the tray 33 is arranged on the top of the spring 34, and the spring 34 is used to elastically support the tray 33, the top of the tray 33 is connected to the bottom surface of the diaphragm 31, so that the spring 34 elastically supports the tray 33 and the diaphragm 31, the second air channel 40 is opened inside the valve seat 30, and the second air channel 40 is opened in a T shape, and both ends of the T-shaped transverse air channel extend to the outer peripheral surface of the valve seat 30, the valve The outer circumferential surface of the seat 30 is symmetrically provided with air outlet connectors 50, and the air outlet connectors 50 correspond one to one to the two ends of the horizontal air channel, the air outlet connector 50 is connected to the tire, the top surface of the protruding position of the diaphragm 31 is abutted against the bottom end of the T-shaped vertical air channel, a magnetic sealing piece 32 is provided on the top of the diaphragm 31, and magnetic pieces are also provided on the two bottom end surfaces of the second air chamber 39, and the magnetic sealing piece 32 is abutted against the bottom end surface of the second air chamber 39. The elastic component and the magnetic sealing piece 32 ensure the sealing effect of the diaphragm 31 during inflation and deflation to avoid leakage or deflation.

[0033] It should be noted that the left end of the air inlet connector 28 is connected to an air charging and discharging system controller, which is used for tire pressure control of the vehicle and can perform air charging and discharging control, thereby improving the control accuracy and reliability of the system.

[0034] When inflating, the high-pressure gas is first continuously delivered through the inflation and deflation system controller, so that the gas enters the first air chamber 27 and the second air chamber 39 through the air inlet connector 28, and is ejected through the bottom end of the second air chamber 39. Due to the elastic support of the diaphragm 31 by the elastic component, the top surface of the diaphragm 31 is stopped at the bottom end of the second air chamber 39. At this time, the high-pressure gas will squeeze the diaphragm 31 downward to make the diaphragm 31 move downward. The movement of the diaphragm 31 drives the tray 33 to move downward. The downward movement of the tray 33 causes the spring 34 to contract. At the same time, the diaphragm 31 moves downward so that the top surface of the protruding position of the diaphragm 31 is separated from the vertical air channel, so that the bottom end of the second air channel 40 is in an open state. At this time, the continuously delivered high-pressure gas will enter the interior of the second air channel 40, and then enter the interior of the air outlet connector 50 through the second air channel 40. Finally, the gas enters the interior of the tire through the air outlet connector 50. After the inflation is completed, the elastic component will push the diaphragm 31 upward, and at the same time, the magnetic sealing sheet 32 ​​and the magnetic sheet will be attracted to each other for sealing.

[0035] When deflation is performed, a section of high-pressure gas is delivered through the inflation and deflation system controller, and the high-pressure gas also squeezes the diaphragm 31 downward, causing the spring 34 to contract, which is consistent with the above-mentioned working principle and will not be repeated here. When the diaphragm 31 moves downward and causes the bottom end of the second air channel 40 to be in an open state, the air pressure in the tire will squeeze the internal gas to flow out through the second air channel 40. When this section of high-pressure gas delivery is completed, the gas has separated the diaphragm 31 from the lip of the vertical air channel of the second air channel 40. At this time, the area of ​​the diaphragm 31 affected by the high-pressure gas at the tire end changes from the area of ​​the small hole in the lip to the same area as the area of ​​the diaphragm 31 pushed open during inflation, thereby maintaining the deflated state. After the inflation and deflation system controller executes pressure maintenance, the air pressure in the pipeline is emptied, and the spring 34 will reset to achieve sealing.

[0036] When measuring the pressure, a section of high-pressure gas is delivered through the inflation and deflation system controller. Similarly, the high-pressure gas squeezes the diaphragm 31 downward, causing the spring 34 to contract, which is consistent with the above-mentioned working principle and will not be repeated here. When the diaphragm 31 moves downward, causing the bottom end of the second air passage 40 to be in an open state, since the inflation and deflation system controller stops delivering high-pressure gas, the air pressure in the tire is greater than the air pressure in the second air passage 40, and the high-pressure gas in the tire flows to the controller end. At this time, the air pressure in the wheel side pipe is balanced with the air pressure in the tire. At this time, the pressure is measured by the system controller, and the measured pressure is the tire pressure.

[0037] When maintaining pressure, the controller of the inflation and deflation system stops inflation and deflation, and the controller quickly sucks the gas in the wheel side pipe to the atmosphere. At the same time, the diaphragm 31 is sucked while the gas in the air chamber is sucked. At the same time, the spring 34 can apply an upward force to the diaphragm 31, so that the spring 34 pushes the diaphragm 31 to fit and seal with the bottom lip of the second air chamber 39 and the second air duct 40, thereby maintaining pressure.

[0038] like Figure 3 As shown, a dustproof pad 37 is provided inside the valve seat 30, and a dustproof cover 36 is provided at the bottom of the dustproof pad 37, and the dustproof pad 37 and the dustproof cover 36 are sleeved on the outer peripheral surface of the valve cover 35 to prevent mud, sand and dust particles from entering the interior of the valve seat 30, thereby ensuring the service life of the rotary valve. A screw hole 12 is provided at the bottom of the valve seat 30, and the bracket 10 is connected and fixed to the bottom of the valve seat 30 by screws 11. A plug 38 is provided on the outer peripheral surface of the valve seat 30, and the plug 38 can replace an air outlet connector 50 for sealing. It should be noted that the rotary inflation valve can adapt to two tires. It only needs to replace the plug 38 with an air outlet connector 50. The two air outlet connectors 50 are respectively connected to a tire, so that the rotary inflation valve can adapt to multiple usage scenarios.

[0039] like Figure 5As shown, a thread 51 is provided on the outer circumferential surface of the air outlet connector 50, a nut 52 is provided on the outer circumferential surface of the air outlet connector 50, the air outlet connector 50 is connected to the valve seat 30 via the thread 51, a valve core is provided inside the air outlet connector 50, and an external air source connector 53 is provided on the outer circumferential surface of the air outlet connector 50. When the gas in the tire needs to be used, a pipe can be connected to the external air source connector 53 to increase the use scenarios of the rotary inflation valve.

[0040] like Figure 1 As shown, the bracket 10 is arranged on the rim, and through holes are provided on both sides of the bracket 10, which can be fixed by bolts on the rim when arranged on a real vehicle.

[0041] It should be noted that the rotating inflation valve adjusts the air pressure inside the tire so that the tire can adapt to different road surfaces.

[0042] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A rotary inflation valve with pressure-maintaining function, comprising: A support (10), a valve seat (30) and a valve body (24), wherein the valve seat (30) and the valve body (24) are sequentially arranged on the top of the support (10), and the support (10) is characterized in that it also includes: an end cover (21), an air inlet connector (28), a first air chamber (27), a diaphragm (31), a second air chamber (39), a second air channel (40), an elastic component and an air outlet connector (50), wherein the end cover (21) is rotatably arranged on the top of the valve body (24), the first air chamber (27) is vertically opened at the inner center position of the end cover (21), the air inlet connector (28) is arranged on the outer peripheral surface of the end cover (21), and the air inlet connector (28) is connected to the first air chamber (27), the second air chamber (39) is symmetrically opened inside the valve seat (30), and the first air chamber (27) and the second air chamber (39) are connected, so that gas can pass through the air inlet connector (2 8) enters the interior of the first air chamber (27) and the second air chamber (39), the second air channel (40) is arranged from left to right inside the valve seat (30), and the second air channel (40) is opened in a T-shape, the bottom end of the T-shape is an air inlet, and the two ends of the T-shape are air outlets, the air outlet connector (50) is arranged on the outer peripheral surface of the valve seat (30), and the air outlet connector (50) is connected to the air outlet, the diaphragm (31) is elastically arranged inside the valve seat (30), the elastic component is arranged at the bottom of the diaphragm (31), and the elastic component elastically supports the diaphragm (31) upward, when the gas is charged or discharged, the external high-pressure gas passes through the first air chamber (27) and the second air chamber (39) to squeeze the diaphragm (31), so that the diaphragm (31) can stop the seal or detach from the bottom port of the second air chamber (39) and the air inlet of the second air channel (40).

2. A rotary inflation valve with pressure-maintaining function according to claim 1, characterized in that: A bearing (23) is sleeved on the outer circumferential surface of the end cover (21), a support frame is arranged inside the valve body (24), and the support frame is used to support the bearing (23) so that the end cover (21) can rotate on the valve body (24), a dustproof sheet (22) is arranged on the top of the valve body (24), and an oil and gas seal (25) is arranged inside the valve body (24).

3. A rotary inflation valve with pressure-maintaining function according to claim 2, characterized in that: The elastic component comprises: a spring (34), a tray (33) and a valve cover (35), wherein the valve cover (35) is arranged at the bottom of the valve seat (30), the spring (34) is arranged at the inner bottom surface of the valve cover (35), the tray (33) is arranged at the top of the spring (34), and the spring (34) is used to elastically support the tray (33), and the top of the tray (33) is connected to the bottom surface of the diaphragm (31) so that the spring (34) elastically supports the tray (33) and the diaphragm (31).

4. A rotary inflation valve with pressure-maintaining function according to claim 3, characterized in that: The second air channel (40) is opened inside the valve seat (30), the two ends of the T-shaped transverse air channel extend to the outer peripheral surface of the valve seat (30), and the air outlet connector (50) corresponds to the two ends of the transverse air channel one by one, and the air outlet connector (50) is connected to the tire.

5. A rotary inflation valve with pressure-maintaining function according to claim 4, characterized in that: A magnetic sealing piece (32) is arranged on the top of the diaphragm (31), and magnetic pieces are also arranged on the two bottom end surfaces of the second air chamber (39), and the magnetic sealing piece (32) abuts against the bottom magnetic piece of the second air chamber (39).

6. A rotary inflation valve with pressure-maintaining function according to claim 5, characterized in that: A dustproof pad (37) is arranged inside the valve seat (30), and a dustproof cover (36) is arranged at the bottom of the dustproof pad (37), and the dustproof pad (37) and the dustproof cover (36) are sleeved on the outer peripheral surface of the valve cover (35).

7. A rotary inflation valve with pressure-maintaining function according to claim 6, characterized in that: The bottom of the valve seat (30) is provided with a screw hole (12), and the bracket (10) and the bottom of the valve seat (30) are connected and fixed by means of screws (11), and a plug (38) is provided on the outer peripheral surface of the valve seat (30).

8. A rotary inflation valve with pressure-maintaining function according to claim 7, characterized in that: The outer circumferential surface of the gas outlet connector (50) is provided with a thread (51), the outer circumferential surface of the gas outlet connector (50) is provided with a nut (52), the gas outlet connector (50) is connected to the valve seat (30) via the thread (51), and the outer circumferential surface of the gas outlet connector (50) is provided with an external gas source connector (53).

9. A rotary inflation valve with pressure-maintaining function according to claim 8, characterized in that: A filter screen (26) is arranged inside the first air chamber (27), and the filter screen (26) is arranged in the shape of an arc-shaped protrusion.

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