A high-pressure, high-flow adaptive pneumatic valve

Abstract

The present invention relates to a high-pressure, high-flow adaptive pneumatic valve, comprising a valve cover, an upper valve body, a lower valve body, a valve core, a valve core spring, a valve core spring seat, a rotating rod, a rod nut, a gear, a rack, a rack piston, a rack spring seat, a rack spring, a spring nut, an air inlet, an air outlet, and a high-pressure airway. The upper valve body is equipped with a rack, one end of the rack is a rack piston, and the other end is a rack spring seat. The rack spring is installed between the upper valve body and the rack spring seat. The rack is meshed with the gear, and the gear is meshed with the upper end of the rotating rod. The rotating rod is installed in a stepped hole of the upper valve body by the rod nut. The lower section of the rotating rod is rotationally connected to the valve core spring seat. The valve core spring seat is axially slidably connected to the lower valve body. A valve core spring is installed in the valve core spring seat. Under the action of the valve core spring, the valve core closes the air inlet, the air outlet is always open, and the high-pressure airway connects the air inlet and the large cavity of the rack piston. Compared with the prior art, the present invention has the advantages of simple structure, energy saving, good adaptability, and a wide working pressure range.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to a high-pressure and large-flow self-adaptive pneumatic valve. Background Art

[0002] High-pressure, high-flow valves play a crucial role in enabling the gas circuit to change operating states when gas pressure changes. Their optimal operating performance typically corresponds to a certain pressure range, making them less adaptable to high-pressure, high-flow operating environments. This is because the gas pressure and corresponding gas flow in these environments vary significantly, exceeding the valve's optimal operating range, rendering the valve insufficient. The solution in this situation is to install valves with different operating pressures to expand the valve system's optimal operating pressure range, or to employ active control to change the valve opening. However, this comes at the cost of increased valve cost and lacks energy efficiency, resulting in certain limitations. Therefore, a high-pressure, high-flow pneumatic valve with a simple structure, low cost, and a wide operating pressure range is undoubtedly a better solution. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a high-pressure and high-flow adaptive pneumatic valve with a simple structure, low cost and a wide working pressure range.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A high-pressure, high-flow adaptive pneumatic valve comprises a valve cover, an upper valve body, and a lower valve body. The upper valve body is provided with a first cavity, within which a rack piston, a rack, an elastic telescopic component, a gear set, and a rotating rod are provided. One end of the rack is connected to the rack piston, and the other end is connected to the elastic telescopic component. The rack is meshed with the gear set. One end of the rotating rod is transmission-connected to the gear set, and the other end extends into the lower valve body. The entire rotating rod is fixed by the upper valve body and can rotate about its own axis.

[0006] The lower valve body is provided with a second cavity, an air inlet and an air outlet, the second cavity is connected to the air inlet and the air outlet respectively, the second cavity is provided with a valve core spring seat, a valve core spring and a valve core connected in sequence, the valve core spring seat is axially movable and installed in the lower valve body, the rotating rod is connected to the valve core spring seat, drives the valve core spring seat to move axially, the valve core faces the air inlet, and is driven by the valve core spring to close or open the air inlet;

[0007] A high-pressure air passage is further provided inside the upper valve body and the lower valve body as a whole. One end of the high-pressure air passage is connected to the air inlet, and the other end is connected to a side of the first cavity where a rack piston is provided.

[0008] Furthermore, the elastic telescopic component includes a rack spring seat, a rack spring and a spring nut, one end of the rack is connected to the rack piston, and the other end is connected to the rack spring seat; the rack spring is installed between the upper valve body and the rack spring seat through the spring nut.

[0009] Furthermore, a cylindrical cavity and a cylindrical through hole are respectively provided on both sides of the first cavity, the rack piston is installed in the cylindrical cavity, the high-pressure airway is connected to the cylindrical cavity, and the rack spring seat, rack spring and spring nut are all installed in the cylindrical through hole.

[0010] Furthermore, a piston sealing ring is installed on the outer side of the rack piston.

[0011] Furthermore, a rod nut is provided in the first cavity and is fixedly installed in the first cavity. The rotating rod is provided with a first boss, and the rod nut presses the first boss of the rotating rod with a clearance fit, so that the rotating rod can rotate freely around its own axis.

[0012] Furthermore, the gear set includes a gear shaft pin and a plurality of gears fixed on the gear shaft pin, the rack is meshed with the gear at the upper end of the gear shaft pin, driving the gear shaft pin to rotate; the top of the rotating rod is meshed with the gear at the lower end of the gear shaft pin, driving the rotating rod to rotate under the drive of the gear shaft pin.

[0013] Furthermore, an axial sliding groove is provided at the upper end of the second cavity, and the sliding groove is located on the outside of the valve core spring seat. A flat key is provided on the outside of the valve core spring seat, and the flat key is located in the sliding groove. The valve core spring seat slides axially in the sliding groove of the lower valve body through the flat key.

[0014] Furthermore, the valve core is provided with a second boss, which cooperates with the second cavity, and the valve core is installed in the second cavity of the lower valve body through the second boss.

[0015] Furthermore, a valve core sealing ring is mounted on the outer side of the second boss.

[0016] Furthermore, a vent hole is formed on the wall of the second cavity between the valve core spring seat and the second boss of the valve core.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention uses the air inlet pressure to push the rack in the upper valve body through the high-pressure air channel, and rotates the rotating rod through the speed-increasing gear, driving the valve core spring seat on the valve core spring to rise, reducing the pressure on the valve core spring, thereby increasing the valve opening. The present invention has a simple structure, good adaptability, energy saving, and adaptability to a wide range of pressures and flows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front cross-sectional view of a high-pressure, high-flow adaptive pneumatic valve provided in an embodiment of the present invention;

[0020] Figure 2 A top cross-sectional view of a pneumatic valve of a high-pressure, large-flow adaptive pneumatic valve provided in an embodiment of the present invention;

[0021] Figure 3 A left-side cross-sectional view of a high-pressure, high-flow adaptive pneumatic valve provided in an embodiment of the present invention;

[0022] In the figure, 1, valve cover, 2, upper valve body, 3, lower valve body, 4, valve core, 5, valve core spring, 6, valve core spring seat, 7, rotating rod, 8, rod nut, 9, gear, 10, rack, 11, rack piston, 12, rack spring, 13, rack spring seat, 14, spring nut, 15, air inlet, 16, air outlet, 17, high-pressure air duct, 18, countersunk screw, 19, hexagon head bolt, 20, washer, 21, sealing gasket, 22, piston sealing ring, 23, hexagon socket hole, 24, gear shaft pin, 25, flat key, 26, slide groove, 27, valve core sealing ring, 28, hexagon socket screw plug, 29, vent hole. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0027] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0028] Example 1

[0029] This embodiment provides a high-pressure, high-flow adaptive pneumatic valve, including a valve cover 1, an upper valve body 2, and a lower valve body 3. The valve cover 1 is characterized in that a first cavity is provided in the upper valve body 2, and a rack piston 11, a rack 10, an elastic telescopic component, a gear set, and a rotating rod 7 are provided in the first cavity. One end of the rack 10 is connected to the rack piston 11, and the other end is connected to the elastic telescopic component. The rack 10 is meshed with the gear set. One end of the rotating rod 7 is transmission-connected to the gear set, and the other end extends into the lower valve body 3. The rotating rod 7 is fixed by the upper valve body 2 as a whole and can rotate around its own axis.

[0030] A second cavity, an air inlet 15, and an air outlet 16 are provided in the lower valve body 3. The second cavity is connected to the air inlet 15 and the air outlet 16 respectively. A valve core spring seat 6, a valve core spring 5, and a valve core 4 are provided in the second cavity, which are connected in sequence. The valve core spring seat 6 is axially movable and installed in the lower valve body 3. The rotating rod 7 is connected to the valve core spring seat 6, driving the valve core spring seat 6 to move axially. The valve core 4 faces the air inlet 15 and, driven by the valve core spring 5, closes or opens the air inlet 15.

[0031] A high-pressure air passage 17 is further provided inside the upper valve body 2 and the lower valve body 3 as a whole. One end of the high-pressure air passage 17 is connected to the air inlet 15 , and the other end is connected to a side of the first cavity where the rack piston 11 is provided.

[0032] Working Principle: When air pressure is very high, it passes through high-pressure air passage 17, pushing rack 10. The gear meshing rotates rod 7, raising valve core spring seat 6, reducing pressure on valve core spring 5 and increasing valve core opening. This pneumatic valve has a simple structure, energy conservation, good adaptability, and a wide range of operating pressures and flows.

[0033] The elastic telescopic component is used to continuously maintain thrust on the rack piston and to contract when the rack piston is subjected to high pressure. As an optional embodiment, the elastic telescopic component includes a rack spring seat 13, a rack spring 12 and a spring nut 14. One end of the rack 10 is connected to the rack piston 11, and the other end is connected to the rack spring seat 13; the rack spring 12 is installed between the upper valve body 2 and the rack spring seat 13 through the spring nut 14.

[0034] A cylindrical cavity and a cylindrical through hole are respectively provided on both sides of the first cavity. The rack piston 11 is installed in the cylindrical cavity. The high-pressure air channel 17 is connected to the cylindrical cavity. The rack spring seat 13, the rack spring 12 and the spring nut 14 are all installed in the cylindrical through hole.

[0035] Preferably, in order to improve the sealing performance of the rack piston 11 , a piston sealing ring 22 is installed on the outer side of the rack piston 11 .

[0036] As a preferred embodiment, a rod nut 8 is also provided in the first cavity, and the rod nut 8 is fixedly installed in the first cavity. The rotating rod 7 is provided with a first boss. The rod nut 8 presses the first boss of the rotating rod 7 with a clearance fit, so that the rotating rod 7 can rotate freely around its own axis.

[0037] As a preferred embodiment, the gear set includes a gear shaft pin 24 and multiple gears 9 fixed on the gear shaft pin 24. The rack 10 is engaged with the gear 9 at the upper end of the gear shaft pin 24, driving the gear shaft pin 24 to rotate; the top of the rotating rod 7 is engaged with the gear 9 at the lower end of the gear shaft pin 24, and the rotating rod 7 is rotated under the drive of the gear shaft pin 24.

[0038] The gear at the upper end of the gear shaft pin 24 can be set to a smaller size to facilitate the rotation driven by the rack, and the gear at the lower end of the gear shaft pin 24 can be set to a larger size to enable the rotating rod to rotate at a large angle.

[0039] As a preferred embodiment, in order to realize stable and reliable axial movement of the valve core spring seat 6, an axial slide groove 26 is provided at the upper end of the second cavity. The slide groove 26 is located on the outside of the valve core spring seat 6. A flat key 25 is provided on the outside of the valve core spring seat 6. The flat key 25 is located in the slide groove 26. The valve core spring seat 6 slides axially in the slide groove 26 of the lower valve body 3 through the flat key 25.

[0040] As a preferred embodiment, the valve core 4 is provided with a second boss, which matches the second cavity, and the valve core 4 is installed in the second cavity of the lower valve body 3 through the second boss.

[0041] Preferably, in order to improve the sealing performance of the valve core 4, a valve core sealing ring 27 is installed on the outer side of the second boss.

[0042] As a preferred embodiment, a vent hole 29 is provided on the wall of the second cavity between the valve core spring seat 6 and the second boss of the valve core 4 to prevent negative pressure from forming inside the valve core and affecting the operation of the pneumatic valve.

[0043] Any combination of the above preferred implementation modes can result in a better implementation mode. An optimal implementation mode is described in detail below.

[0044] like Figure 1-3 As shown, the high-pressure, high-flow adaptive pneumatic valve of this embodiment includes: a valve cover 1, an upper valve body 2, a lower valve body 3, a valve core 4, a valve core spring 5, a valve core spring seat 6, a rotating rod 7, a rod nut 8, a gear 9, a rack 10, a rack piston 11, a rack spring seat 12, a rack spring 13, a spring nut 14, an air inlet 15, an air outlet 16, and a high-pressure air channel 17;

[0045] The valve cover 1 is fixedly connected to the upper valve body 2 with a countersunk screw 18, and the upper valve body 2 and the lower valve body 3 are fixedly connected with a hexagonal head bolt 19 and a washer 20. The hexagonal head bolt 19 passes through the lower valve body 3 and is connected to the upper valve body 2. The upper valve body 2 is equipped with a rack 10, one end of the rack 10 is a rack piston 11, and the other end is a rack spring seat 12. The rack spring 13 is installed between the upper valve body 2 and the rack spring seat 12 through the spring nut 14. The rack 10 is engaged with the gear 9, and the gear 9 is engaged with the upper end of the rotating rod 7. The rotating rod 7 is installed in the stepped hole of the upper valve body 2 by the rod nut 8. The lower section of the rotating rod 7 is rotationally connected to the valve core spring seat 6, and the valve core spring seat 6 is axially slidingly connected to the lower valve body 3. The valve core spring 5 is installed in the valve core spring seat 6.

[0046] Under the action of the valve spring 5, the valve core 4 closes the air inlet 15, leaving the air outlet 16 open. A high-pressure air passage 17 connects the air inlet 15 with the large cavity of the rack piston 11. Air pressure connects the valve core 4 to the air inlet 15 and the air outlet 16. When air pressure is very high, the high pressure passes through the high-pressure air passage 17, pushing the rack 10. This meshing action of the gear 9 rotates the rotating rod 7, raising the valve core spring seat 6, reducing the pressure on the valve core spring 5 and increasing the opening of the valve core 4. This pneumatic valve has a simple structure, is energy-efficient, has excellent adaptability, and operates over a wide range of pressures and flows.

[0047] The valve cover 1 is adapted to the shape of the top surface of the upper valve body 2. The upper valve body 2 has a rectangular cavity downward from the top surface, and a stepped cylindrical hole is opened downward from the bottom surface of the rectangular cavity, which passes through the bottom surface of the upper valve body 2. The left and right sides of the rectangular cavity are respectively opened outward with a coaxial cylindrical cavity and a cylindrical through hole of the same diameter;

[0048] The lower valve body 3 has a cylindrical cavity from the top surface downward that is coaxial with the stepped cylindrical hole of the upper valve body 2. The center and side of the bottom surface of the cylindrical cavity are respectively provided with an air inlet and an air outlet that pass through the bottom surface and side surface of the lower valve body 3. There is a sealing gasket 21 between the connecting surfaces of the upper valve body 2 and the lower valve body 3. The upper valve body 2 and the lower valve body 3 are provided with a connecting high-pressure air duct 17. The high-pressure air duct 17 is connected from the air inlet 15 of the lower valve body 3 to the bottom surface of the cylindrical cavity of the upper valve body 2. The process hole of the high-pressure air duct 17 is sealed with a hexagonal screw plug 28.

[0049] The rack piston 11 is installed in the cylindrical cavity of the upper valve body. The rack piston 11 is hoop-mounted with an annular piston sealing ring 22. The rack spring seat 12 is installed in the cylindrical through hole of the upper valve body 2. The rack spring 13 is pressed and sealed in the cylindrical through hole by the spring nut 14. The spring nut 14 forms a rotating connection with the cylindrical through hole. The middle of the spring nut 14 is a hexagonal hole 23.

[0050] The gear meshing between the rack 10 and the upper end of the rotating rod 7 realizes the speed-up transmission. The speed-up transmission transmits the small translation of the rack 10 to the rotating rod 7, so that the rotating rod 7 can realize large-angle rotation. The gear 9 is installed on the valve cover 1 and the upper valve body 2 through the gear shaft pin 24. The middle section of the rotating rod 7 is a cylindrical boss, that is, the first boss, which is installed in the large hole of the stepped cylindrical hole of the upper valve body 2, and the cylindrical boss of the rotating rod 7 is pressed with a rod nut 8 with a clearance fit, so that the rotating rod 7 can rotate freely around its own axis. The middle of the rod nut 8 is a through hole, which passes through the upper section of the rotating rod 7 and is rotatably installed in the large hole of the stepped cylindrical hole of the upper valve body 2. The lower section of the rotating rod 7 passes through the small hole of the stepped cylindrical hole of the upper valve body 2 and extends into the cylindrical cavity of the lower valve body 3.

[0051] An axial slide groove 26 is provided on the outside of the valve core spring seat 6, and a flat key 25 is installed in the slide groove 26. The valve core spring seat 6 can slide in the axial slide groove 26 of the cylindrical cavity of the lower valve body 3 through the flat key 25. The valve core spring 5 is sleeved on the upper section of the valve core 4. The valve core 4 is provided with an intermediate cylindrical boss, i.e., the second boss. The valve core 4 is installed in the cylindrical cavity of the lower valve body 3 through the intermediate cylindrical boss. The boss hoop of the valve core 4 is equipped with an annular valve core sealing ring 27. The lower section of the valve core 4 closes the air inlet 15 under the action of the valve core spring 5. A vent 29 is provided on the wall of the cylindrical cavity of the lower valve body 3 between the valve core spring seat 6 and the intermediate boss of the valve core 4.

[0052] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A high-pressure, high-flow adaptive pneumatic valve, comprising a valve cover (1), an upper valve body (2) and a lower valve body (3), characterized in that: A first cavity is provided in the upper valve body (2), and a rack piston (11), a rack (10), an elastic telescopic component, a gear set and a rotating rod (7) are provided in the first cavity. One end of the rack (10) is connected to the rack piston (11), and the other end is connected to the elastic telescopic component. The rack (10) is meshed with the gear set. One end of the rotating rod (7) is connected to the gear set in a transmission manner, and the other end extends into the lower valve body (3). The rotating rod (7) is fixed by the upper valve body (2) as a whole and can rotate around its own axis. The lower valve body (3) is provided with a second cavity, an air inlet (15) and an air outlet (16), the second cavity is connected to the air inlet (15) and the air outlet (16) respectively, the second cavity is provided with a valve core spring seat (6), a valve core spring (5) and a valve core (4) which are connected in sequence, the valve core spring seat (6) is axially movable and installed in the lower valve body (3), the rotating rod (7) is connected to the valve core spring seat (6), drives the valve core spring seat (6) to move axially, and the valve core (4) faces the air inlet (15), and under the drive of the valve core spring (5), closes or opens the air inlet (15); A high-pressure air passage (17) is further provided inside the upper valve body (2) and the lower valve body (3), one end of the high-pressure air passage (17) is connected to the air inlet (15), and the other end is connected to a side of the first cavity where the rack piston (11) is provided; The elastic telescopic assembly comprises a rack spring seat (13), a rack spring (12) and a spring nut (14); one end of the rack (10) is connected to the rack piston (11), and the other end is connected to the rack spring seat (13); the rack spring (12) is installed between the upper valve body (2) and the rack spring seat (13) through the spring nut (14); A cylindrical cavity and a cylindrical through hole are respectively provided on both sides of the first cavity, the rack piston (11) is installed in the cylindrical cavity, the high-pressure air passage (17) is connected to the cylindrical cavity, and the rack spring seat (13), the rack spring (12) and the spring nut (14) are all installed in the cylindrical through hole; The gear set includes a gear shaft pin (24) and a plurality of gears (9) fixed on the gear shaft pin (24); the rack (10) is meshed with the gear (9) at the upper end of the gear shaft pin (24), driving the gear shaft pin (24) to rotate; the top of the rotating rod (7) is meshed with the gear (9) at the lower end of the gear shaft pin (24), and the rotating rod (7) is rotated under the drive of the gear shaft pin (24); A rod nut (8) is further provided in the first cavity. The rod nut (8) is fixedly mounted in the first cavity. The rotating rod (7) is provided with a first boss. The rod nut (8) presses the first boss of the rotating rod (7) with a clearance fit, so that the rotating rod (7) can freely rotate around its own axis. An axial sliding groove (26) is provided at the upper end of the second cavity, and the sliding groove (26) is located on the outside of the valve core spring seat (6). A flat key (25) is provided on the outside of the valve core spring seat (6), and the flat key (25) is located in the sliding groove (26). The valve core spring seat (6) slides axially in the sliding groove (26) of the lower valve body (3) through the flat key (25).

2. A high-pressure, high-flow adaptive pneumatic valve according to claim 1, characterized in that: The outer side of the rack piston (11) is hooped with a piston sealing ring (22).

3. The high-pressure, high-flow adaptive pneumatic valve according to claim 1, characterized in that: The valve core (4) is provided with a second boss, which cooperates with the second cavity, and the valve core (4) is installed in the second cavity of the lower valve body (3) through the second boss.

4. A high-pressure, high-flow adaptive pneumatic valve according to claim 3, characterized in that: The outer side of the second boss is provided with a valve core sealing ring (27).

5. The high-pressure, high-flow adaptive pneumatic valve according to claim 3, characterized in that: A vent hole (29) is provided on the wall of the second cavity between the valve core spring seat (6) and the second boss of the valve core (4).

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