CN117905836A - Air spring pressure maintaining valve - Google Patents
Air spring pressure maintaining valve Download PDFInfo
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- CN117905836A CN117905836A CN202311667424.9A CN202311667424A CN117905836A CN 117905836 A CN117905836 A CN 117905836A CN 202311667424 A CN202311667424 A CN 202311667424A CN 117905836 A CN117905836 A CN 117905836A
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- 238000007789 sealing Methods 0.000 claims abstract description 57
- 210000001503 joint Anatomy 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to the technical field of pressure maintaining valves, and discloses an air spring pressure maintaining valve, which comprises an air pump pipeline connector, a valve body and an air spring air chamber connector, wherein the air pump pipeline connector and the air spring air chamber connector are respectively arranged at two ends of the valve body, and the air pump pipeline connector, the valve body and the air spring air chamber connector are communicated with each other, and the air spring pressure maintaining valve further comprises: the movable slide bar is arranged in the valve body in a sliding way, the exhaust spring is in a compressed state, and the movable slide bar is in butt joint with the air spring air chamber interface under the compression force of the exhaust spring and is sealed through a sealing gasket. The two-way control air inlet and exhaust mode is adopted, so that the problem that the valve core is required to be ejected for exhausting of the one-way valve is solved; the function of the pressure maintaining valve is isolated from the problem of the depth of the insertion pipe, and the insertion depth does not need to be adjusted and controlled, so that the automatic pressure maintaining of the assembled air spring is realized; after the cannula, the pressure maintaining valve can also automatically maintain a certain pressure in the air spring.
Description
Technical Field
The invention relates to the technical field of pressure maintaining valves, in particular to an air spring pressure maintaining valve.
Background
The air springs require that a certain inflation pressure be maintained after assembly for subsequent vehicle chassis assembly. Meanwhile, in the use process, when the air supply unit of the air spring does not work or exhausts air, certain minimum pressure requirement is also required to be ensured to be reserved inside the air spring.
The pressure maintaining valve in the current market is usually a check valve structural design, and when a vehicle is assembled, the check valve needs to be opened by using an air pipe, and the following defects exist in the mode:
1. when the cannula is inserted, certain requirements are placed on the insertion depth, and if the cannula is not in place, the one-way valve is not opened, so that the function of the air spring can be invalid;
2. The intubate adopts the manual mode more, and the degree of depth of insertion is difficult to control, is difficult to realize the automatic pressurize requirement in the air spring after the assembly.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides an air spring pressure maintaining valve.
The invention provides an air spring pressure-maintaining valve, which comprises an air pump pipeline interface, a valve body and an air spring air chamber interface, wherein the air pump pipeline interface and the air spring air chamber interface are respectively arranged at two ends of the valve body, and the air pump pipeline interface, the valve body and the air spring air chamber interface are communicated with each other, and the air spring pressure-maintaining valve further comprises:
The movable slide bar is arranged in the valve body in a sliding way, the exhaust spring is in a compressed state, and the movable slide bar is in butt joint with the air spring air chamber interface under the compression force of the exhaust spring and is sealed through a sealing gasket;
the rear end of the air inlet valve rod is arranged in the movable slide rod in a sliding way and sleeved with an air inlet spring, the front end of the air inlet valve rod extends into the air spring air chamber interface and is sleeved with an O-shaped sealing ring, and the outer surface of the front end of the air inlet valve rod is provided with a through hole;
When air is taken in, the air pressure at the air pump pipeline interface is larger than that at the air spring air chamber interface, the movable slide bar is in butt joint with the air spring air chamber interface under the action of air intake pressure and an exhaust spring, the air spring air chamber interface is sealed with an air passage in the valve body through a sealing gasket, the air intake valve rod moves towards the air spring air chamber interface under the action of air intake pressure against the spring force of the air intake spring, a through hole at the front end of the air intake valve rod moves to the outside of the movable slide bar, and the air passage of the movable slide bar and the air spring air chamber interface is communicated through the through hole;
When the air is exhausted, the air pressure at the air spring air chamber interface is larger than the air pressure at the air pump pipeline interface, the air inlet valve rod moves towards the air pump pipeline interface under the action of the exhaust pressure and the spring force of the air inlet spring, the through hole at the front end of the air inlet valve rod moves into the movable slide rod and is sealed through the O-shaped sealing ring, the movable slide rod moves towards the air pump pipeline interface under the action of the exhaust pressure against the spring force of the exhaust spring, and the sealing gasket is separated from the air spring air chamber interface, so that the air spring air chamber interface is communicated with the air passage in the valve body;
in the process of exhausting, the gas pressure at the air spring air chamber interface is always greater than the gas pressure at the air pump pipeline interface, when the pressure difference between the air spring air chamber interface and the air pump pipeline interface reaches a certain value, the pressure generated by the section of the movable slide rod and the spring force of the exhaust spring are in a balanced state, and the exhaust spring pushes the movable slide rod and the sealing gasket to seal with the air spring air chamber interface along with the reduction of the pressure difference, so that the gas circuit in the valve body is sealed, and the movable slide rod is still sealed with the air spring air chamber interface through an O-shaped sealing ring, thereby realizing pressure maintaining.
As a further optimized scheme of the invention, a first air channel, a second air channel, a third air channel and a fourth air channel are arranged in the valve body, the first air channel, the second air channel and the third air channel are respectively arranged in the middle part and at two ends of the valve body, the first air channel, the second air channel and the third air channel are mutually communicated, an air pump pipeline interface is communicated with the second air channel, an air spring air chamber interface is communicated with the third air channel, the fourth air channel is arranged at the side part of the first air channel, and two ends of the fourth air channel are respectively communicated with the second air channel and the third air channel;
When air is taken in, one end of the movable slide bar is sleeved in the first air passage in a sliding way, the other end of the movable slide bar is in butt joint with one end of the air spring air chamber interface positioned in the third air passage and is sealed through a sealing gasket, so that the inner cavity of the air spring air chamber interface is isolated from the third air passage, and the inner cavity of the air spring air chamber interface is communicated with the air inlet valve rod and the first air passage through a through hole;
When the air is exhausted, the air inlet valve rod moves into the movable slide rod, the front end of the air inlet valve rod isolates the movable slide rod from the air spring air chamber interface through the O-shaped sealing ring, and the movable slide rod drives the sealing gasket to be separated from the air spring air chamber interface, so that the inner cavity of the air spring air chamber interface is communicated with the third air circuit;
when pressure is maintained, the O-shaped sealing ring isolates the movable sliding rod from the air spring air chamber interface, and the sealing gasket isolates the air spring air chamber interface from the third air passage.
As a further optimized scheme of the invention, the movable slide bar comprises a first slide bar, a second slide bar and a third slide bar, the second slide bar and the third slide bar are respectively arranged at two ends of the first slide bar, the second slide bar is in sliding connection with the first air channel and is matched with the first air channel, the first slide bar is arranged in the middle of the third air channel, one end of the third slide bar, which is positioned in the third air channel, of the air spring air chamber interface is in sliding connection with the third air channel, the sealing gasket is sleeved on the third slide bar, and the sealing gasket is arranged opposite to the end face of the air spring air chamber interface.
As a further optimized scheme of the invention, the outer diameters of the first slide bar, the second slide bar and the third slide bar are sequentially reduced, and the outer diameters of the end surfaces of the first slide bar, the sealing gasket and the air spring air chamber interface are consistent.
As a further optimized scheme of the invention, the outer wall of the third slide bar is provided with air flow guide grooves distributed along the axial direction of the third slide bar, one end of each air flow guide groove, which is far away from the first slide bar, is provided with an opening, and when the air is exhausted, the inner cavity of the air spring air chamber interface is communicated with the third air channel through the air flow guide grooves.
As a further optimized scheme of the invention, the number of the air flow guide grooves and the third air channels is multiple, and each air flow guide groove pair corresponds to one third air channel.
As a further optimized scheme of the invention, an opening is arranged on one side of the first air passage close to the air pump pipeline interface, the diameter of the opening is smaller than the inner diameter of the first air passage, the exhaust spring is arranged in the first air passage in a sliding manner, and two ends of the exhaust spring are respectively abutted with one side inner wall of the first air passage and one side end face of the movable sliding rod.
As a further optimized scheme of the invention, one end of the air inlet valve rod, which is positioned in the movable slide rod, is provided with an annular flanging, the outer peripheral surface of the annular flanging is in sliding connection with the inner wall of the movable slide rod, and the air inlet spring is sleeved on the air inlet valve rod in a sliding manner, and when air is introduced, the air inlet spring is in a compressed state, and two ends of the air inlet spring are respectively abutted with the annular end surface of the annular flanging and the inner wall of one side of the annular flanging.
The air spring pressure maintaining valve provided by the invention has the following beneficial effects:
Firstly, a bidirectional control air inlet and exhaust mode is adopted, so that the problem that a valve core is required to be ejected for exhausting of a one-way valve is solved;
secondly, the function of the pressure maintaining valve and the problem of the depth of the cannula are isolated, and the insertion depth does not need to be adjusted and controlled, so that the automatic pressure maintaining of the assembled air spring is realized;
and thirdly, after the cannula, the pressure maintaining valve can automatically maintain certain pressure in the air spring.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a three-dimensional cross-sectional structure of the present invention;
FIG. 2 is a schematic diagram of the intake flow of the present invention;
FIG. 3 is a schematic diagram of the exhaust flow of the present invention;
FIG. 4 is a schematic diagram of the present invention showing a pressure maintaining state;
FIG. 5 is a schematic view of a movable slide bar according to the present invention;
FIG. 6 is a schematic diagram of the distribution of the air passages inside the valve body of the present invention.
Description of the drawings: 1. an air pump pipeline interface; 2. a valve body; 21. a first air path; 22. a second air path; 23. a third air path; 24. a fourth air path; 3. an exhaust spring; 4. moving the slide bar; 41. a first slide bar; 42. a second slide bar; 43. a third slide bar; 5. an air intake spring; 6. a sealing gasket; 7. an air inlet valve rod; 8. an O-shaped sealing ring; 9. an air spring air chamber interface; 10. an air flow guide groove; 11. and a through hole.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Referring to fig. 1-4, an air spring pressure-maintaining valve includes an air pump pipe interface 1, a valve body 2, and an air spring air chamber interface 9, wherein the air pump pipe interface 1 and the air spring air chamber interface 9 are respectively installed at two ends of the valve body 2, and the air pump pipe interface 1, the valve body 2, and the air spring air chamber interface 9 are internally communicated, and the air spring pressure-maintaining valve further includes:
The exhaust spring 3 and the movable slide bar 4 are arranged in the valve body 2 in a sliding way, the exhaust spring 3 is in a compressed state, and the movable slide bar 4 is in butt joint with the air spring air chamber interface 9 under the compression force of the exhaust spring 3 and is sealed through the sealing gasket 6;
The rear end of the air inlet valve rod 7 is arranged in the movable slide rod 4 in a sliding manner and sleeved with an air inlet spring 5, the front end of the air inlet valve rod 7 extends into an air spring air chamber interface 9 and is sleeved with an O-shaped sealing ring 8, and the outer surface of the front end of the air inlet valve rod 7 is provided with a through hole 11;
When air is taken in, as shown in fig. 2, the air pressure at the air pump pipeline interface 1 is greater than the air pressure at the air spring air chamber interface 9, the movable slide bar 4 is in butt joint with the air spring air chamber interface 9 under the action of the air intake pressure and the air exhaust spring 3, the air spring air chamber interface 9 is sealed with an air passage in the valve body 2 through the sealing gasket 6, the air intake valve rod 7 moves towards the air spring air chamber interface 9 under the action of the air intake pressure against the spring force of the air intake spring 5, the through hole 11 at the front end of the air intake valve rod 7 moves to the outside of the movable slide bar 4, and the air passage of the movable slide bar 4 and the air spring air chamber interface 9 is communicated through the through hole 11;
When the air is exhausted, as shown in fig. 3, the air pressure at the air spring air chamber interface 9 is larger than the air pressure at the air pump pipeline interface 1, under the action of the exhaust pressure and the spring force of the air inlet spring 5, the air inlet valve rod 7 moves towards the air pump pipeline interface 1, the through hole 11 at the front end of the air inlet valve rod 7 moves into the movable slide rod 4 and is sealed by the O-shaped sealing ring 8, the movable slide rod 4 moves towards the air pump pipeline interface 1 against the spring force of the air outlet spring 3 under the action of the exhaust pressure, and the sealing gasket 6 is separated from the air spring air chamber interface 9, so that the air spring air chamber interface 9 is communicated with the air passage in the valve body 2;
It should be noted that, the front end outer surface of the air inlet valve rod 7 is provided with an annular groove, the O-shaped sealing ring 8 is sleeved in the annular groove, the front end opening of the movable slide rod 4 is provided with an opening, and the opening is in a horn mouth shape, when the air is exhausted, the through hole 11 at the front end of the air inlet valve rod 7 moves into the movable slide rod 4, and then the O-shaped sealing ring 8 moves into the opening, and the opening is sealed by the O-shaped sealing ring 8;
As shown in fig. 2, in the process of exhausting, the gas pressure at the air spring air chamber interface 9 is always greater than the gas pressure at the air pump pipeline interface 1, when the pressure difference between the two is up to a certain value, the pressure generated on the section of the movable slide rod 4 and the spring force of the exhaust spring 3 are in a balanced state, and as the pressure difference is reduced, the exhaust spring 3 pushes the movable slide rod 4 and the sealing gasket 6 to seal with the air spring air chamber interface 9, so that the gas circuit in the valve body 2 is closed, and the space between the movable slide rod 4 and the air spring air chamber interface 9 is still sealed by the O-shaped sealing ring 8, thereby realizing pressure maintaining.
Specifically, referring to fig. 6, a first air channel 21, a second air channel 22, a third air channel 23 and a fourth air channel 24 are arranged in the valve body 2, the first air channel 21, the second air channel 22 and the third air channel 23 are respectively arranged at the middle part and two ends of the valve body 2, the first air channel 21, the second air channel 22 and the third air channel 23 are mutually communicated, an air pump pipeline interface 1 is communicated with the second air channel 22, an air spring air chamber interface 9 is communicated with the third air channel 23, the fourth air channel 24 is arranged at the side part of the first air channel 21, and two ends of the fourth air channel 24 are respectively communicated with the second air channel 22 and the third air channel 23;
the axes of the air pump pipeline interface 1, the second air channel 22, the first air channel 21, the movable slide bar 4, the air inlet valve rod 7 and the air spring air chamber interface 9 are overlapped;
When air is taken in, one end of the movable slide bar 4 is sleeved in the first air passage 21 in a sliding way, the other end of the movable slide bar 4 is in butt joint with one end of the air spring air chamber interface 9, which is positioned in the third air passage 23, and is sealed through the sealing gasket 6, so that the inner cavity of the air spring air chamber interface 9 is isolated from the third air passage 23, the inner cavity of the air spring air chamber interface 9 is communicated with the air inlet valve rod 7 and the first air passage 21 through the through hole 11, and air entering through the air pump pipeline interface 1 sequentially passes through the second air passage 22, the first air passage 21, the movable slide bar 4 and the air inlet valve rod 7, and finally enters into an air spring through the air spring air chamber interface 9;
When the air is exhausted, the air inlet valve rod 7 moves into the movable slide rod 4, the front end of the air inlet valve rod 7 isolates the movable slide rod 4 from the air spring air chamber interface 9 through the O-shaped sealing ring 8, the movable slide rod 4 drives the sealing gasket 6 to be separated from the air spring air chamber interface 9, so that the inner cavity of the air spring air chamber interface 9 is communicated with the third air channel 23, and air enters from the air spring air chamber interface 9 and sequentially passes through the third air channel 23, the fourth air channel 24 and the second air channel 22, and finally is exhausted outwards from the air pump pipeline interface 1;
when pressure is maintained, the O-shaped sealing ring 8 isolates the movable sliding rod 4 from the air spring air chamber interface 9, and the sealing gasket 6 isolates the air spring air chamber interface 9 from the third air passage 23;
Specifically, the movable slide bar 4 comprises a first slide bar 41, a second slide bar 42 and a third slide bar 43, the second slide bar 42 and the third slide bar 43 are respectively arranged at two ends of the first slide bar 41, the second slide bar 42 is in sliding connection with the first air channel 21 and is matched with the first air channel 21, the first slide bar 41 is arranged in the middle of the third air channel 23, the third slide bar 43 is in sliding connection with one end of the air spring air chamber interface 9, which is positioned in the third air channel 23, the sealing gasket 6 is sleeved on the third slide bar 43, and the sealing gasket 6 is arranged opposite to the end face of the air spring air chamber interface 9;
Further, the outer diameters of the first sliding rod 41, the second sliding rod 42 and the third sliding rod 43 are sequentially reduced, and the outer diameters of the end surfaces of the first sliding rod 41, the sealing gasket 6 and the air spring air chamber interface 9 are consistent;
Further, as shown in fig. 5 and 6, the outer wall of the third sliding rod 43 is provided with air flow guiding grooves 10 distributed along the axial direction thereof, one end of the air flow guiding groove 10 away from the first sliding rod 41 is provided with an opening, and when the air is exhausted, the inner cavity of the air spring air chamber interface 9 is communicated with the third air path 23 through the air flow guiding groove 10;
Further, the number of the air flow guiding grooves 10 and the third air channels 23 is plural, and each air flow guiding groove 10 corresponds to one third air channel 23; the number of the airflow guide grooves 10 is preferably three, and the three airflow guide grooves 10 are symmetrically distributed by taking the axis of the third sliding rod 43 as the center;
Specifically, an opening is formed in one side of the first air channel 21, which is close to the air pump pipeline interface 1, the opening diameter is smaller than the inner diameter of the first air channel 21, the exhaust spring 3 is slidably arranged in the first air channel 21, and two ends of the exhaust spring 3 are respectively abutted with one side inner wall of the first air channel 21 and one side end face of the movable sliding rod 4;
Specifically, the air inlet valve rod 7 is located the inside one end of removal slide bar 4 and has annular turn-ups, and annular turn-ups's outer peripheral surface and the inner wall sliding connection who removes slide bar 4, and air inlet spring 5 slip cap is on air inlet valve rod 7, and when admitting air, air inlet spring 5 is in compressed state, and air inlet spring 5's both ends respectively with annular turn-ups's annular terminal surface and 4 one side inner wall butt.
In summary, the invention is formed by welding an air pump pipeline interface 1, an air spring air chamber interface 9 and a valve body 2, an exhaust spring 3, a movable slide bar 4, an air inlet spring 5, a sealing gasket 6, an air inlet valve rod 7 and an O-shaped sealing ring 8 are assembled in the air pump pipeline interface, the movable slide bar 4 slides in the valve body 2, the compressed air spring 3 pushes the air spring air chamber interface 9 to compress the sealing gasket 6, the air passage sealing is realized, so that the air exhaust and pressure maintaining functions are realized, the O-shaped sealing ring 8 is clamped at the front end of the air inlet valve rod 7, the air inlet spring 5 is arranged at the rear end of the air inlet valve rod, the air inlet valve rod 7 can slide in the movable slide bar 4, the O-shaped sealing ring 8 is utilized for sealing and the air inlet valve rod 7 is limited, and the air inlet function is realized.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides an air spring pressure retaining valve, includes air pump pipeline interface (1), valve body (2), air spring air chamber interface (9), and air pump pipeline interface (1) and air spring air chamber interface (9) are installed respectively at the both ends of valve body (2), and air pump pipeline interface (1), valve body (2), air spring air chamber interface (9) inside intercommunication, its characterized in that still includes:
the air exhaust valve comprises an air exhaust spring (3) and a movable slide bar (4), wherein the movable slide bar (4) is arranged in a valve body (2) in a sliding manner, the air exhaust spring (3) is in a compressed state, and the movable slide bar (4) is in butt joint with an air spring air chamber interface (9) under the action of the compression force of the air exhaust spring (3) and is sealed through a sealing gasket (6);
the rear end of the air inlet valve rod (7) is arranged in the movable slide rod (4) in a sliding manner and sleeved with an air inlet spring (5), the front end of the air inlet valve rod (7) extends into an air spring air chamber interface (9) and is sleeved with an O-shaped sealing ring (8), and the outer surface of the front end of the air inlet valve rod (7) is provided with a through hole (11);
When air is taken in, the air pressure at the air pump pipeline interface (1) is larger than the air pressure at the air spring air chamber interface (9), the movable sliding rod (4) is in butt joint with the air spring air chamber interface (9) under the action of air inlet pressure and the air outlet spring (3), the air spring air chamber interface (9) is sealed with an air passage in the valve body (2), the air inlet valve rod (7) moves towards the air spring air chamber interface (9) under the action of air inlet pressure against the spring force of the air inlet spring (5), the through hole (11) at the front end of the air inlet valve rod (7) moves to the outside of the movable sliding rod (4), and the air passage of the movable sliding rod (4) and the air spring air chamber interface (9) are communicated through the through hole (11);
When the air is exhausted, the air pressure at the air spring air chamber interface (9) is larger than the air pressure at the air pump pipeline interface (1), under the action of the exhaust pressure and the spring force of the air inlet spring (5), the air inlet valve rod (7) moves towards the air pump pipeline interface (1), the through hole (11) at the front end of the air inlet valve rod (7) moves into the movable slide rod (4) and is sealed by the O-shaped sealing ring (8), the movable slide rod (4) moves towards the air pump pipeline interface (1) against the spring force of the air outlet spring (3) under the action of the air exhaust pressure, and the sealing gasket (6) is separated from the air spring air chamber interface (9), so that the air spring air chamber interface (9) is communicated with the air passage in the valve body (2);
In the process of exhausting, the gas pressure at the air spring air chamber interface (9) is always larger than the gas pressure at the air pump pipeline interface (1), when the pressure difference between the air spring air chamber interface and the air pump pipeline interface reaches a certain value, the pressure generated by the section of the movable sliding rod (4) and the spring force of the exhaust spring (3) are in a balanced state, and along with the reduction of the pressure difference, the exhaust spring (3) pushes the movable sliding rod (4) and the sealing gasket (6) to seal with the air spring air chamber interface (9), so that the gas circuit in the valve body (2) is sealed, and the movable sliding rod (4) and the air spring air chamber interface (9) are still sealed through the O-shaped sealing ring (8), thereby realizing pressure maintaining.
2. The air spring pressure maintaining valve according to claim 1, wherein a first air passage (21), a second air passage (22), a third air passage (23) and a fourth air passage (24) are arranged in the valve body (2), the first air passage (21), the second air passage (22) and the third air passage (23) are respectively arranged in the middle and at two ends of the valve body (2), the first air passage (21), the second air passage (22) and the third air passage (23) are mutually communicated, an air pump pipeline interface (1) is communicated with the second air passage (22), an air spring air chamber interface (9) is communicated with the third air passage (23), the fourth air passage (24) is arranged at the side part of the first air passage (21), and two ends of the fourth air passage (24) are respectively communicated with the second air passage (22) and the third air passage (23);
When air is taken in, one end of the movable slide bar (4) is sleeved in the first air passage (21) in a sliding manner, the other end of the movable slide bar (4) is in butt joint with one end of the air spring air chamber interface (9) positioned in the third air passage (23) and is sealed through the sealing gasket (6), so that the inner cavity of the air spring air chamber interface (9) is isolated from the third air passage (23), and the inner cavity of the air spring air chamber interface (9) is communicated with the air intake valve rod (7) and the first air passage (21) through the through hole (11);
When the air is exhausted, the air inlet valve rod (7) moves into the movable slide rod (4), the front end of the air inlet valve rod (7) isolates the movable slide rod (4) from the air spring air chamber interface (9) through the O-shaped sealing ring (8), and the movable slide rod (4) drives the sealing gasket (6) to be separated from the air spring air chamber interface (9), so that the inner cavity of the air spring air chamber interface (9) is communicated with the third air passage (23);
When pressure is maintained, the O-shaped sealing ring (8) isolates the movable sliding rod (4) from the air spring air chamber interface (9), and the sealing gasket (6) isolates the air spring air chamber interface (9) from the third air passage (23).
3. An air spring pressure maintaining valve according to claim 2, characterized in that the movable slide bar (4) comprises a first slide bar (41), a second slide bar (42) and a third slide bar (43), the second slide bar (42) and the third slide bar (43) are respectively arranged at two ends of the first slide bar (41), the second slide bar (42) is in sliding connection with the first air channel (21) and are matched with each other, the first slide bar (41) is arranged in the middle of the third air channel (23), the third slide bar (43) is in sliding connection with one end of the air spring air chamber interface (9) in the third air channel (23), the sealing gasket (6) is sleeved on the third slide bar (43), and the sealing gasket (6) is arranged opposite to the end face of the air spring air chamber interface (9).
4. An air spring pressure maintaining valve according to claim 3, wherein the outer diameters of the first sliding rod (41), the second sliding rod (42) and the third sliding rod (43) are sequentially reduced, and the outer diameters of the end surfaces of the first sliding rod (41), the sealing gasket (6) and the air spring air chamber interface (9) are consistent.
5. An air spring pressure maintaining valve according to claim 2, characterized in that the outer wall of the third slide bar (43) is provided with air flow guide grooves (10) distributed along the axial direction of the third slide bar, one end of the air flow guide groove (10) far away from the first slide bar (41) is provided with an opening, and when the air is exhausted, the inner cavity of the air spring air chamber interface (9) is communicated with the third air passage (23) through the air flow guide groove (10).
6. An air spring pressure maintaining valve according to claim 5, wherein the number of the air flow guiding grooves (10) and the third air passages (23) is plural, and each air flow guiding groove (10) corresponds to one third air passage (23).
7. The air spring pressure maintaining valve according to claim 2, wherein an opening is formed in one side of the first air passage (21) close to the air pump pipeline interface (1), the opening diameter is smaller than the inner diameter of the first air passage (21), the air exhaust spring (3) is slidably arranged in the first air passage (21), and two ends of the air exhaust spring (3) are respectively abutted with one side inner wall of the first air passage (21) and one side end face of the movable sliding rod (4).
8. The air spring pressure maintaining valve according to claim 1, wherein one end of the air inlet valve rod (7) positioned inside the movable slide rod (4) is provided with an annular flanging, the outer circumferential surface of the annular flanging is in sliding connection with the inner wall of the movable slide rod (4), the air inlet valve rod (7) is sleeved with the air inlet spring (5) in a sliding mode, when air is inlet, the air inlet spring (5) is in a compressed state, and two ends of the air inlet spring (5) are respectively abutted with the annular end face of the annular flanging and one side inner wall of the annular flanging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311667424.9A CN117905836A (en) | 2023-12-07 | 2023-12-07 | Air spring pressure maintaining valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311667424.9A CN117905836A (en) | 2023-12-07 | 2023-12-07 | Air spring pressure maintaining valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117905836A true CN117905836A (en) | 2024-04-19 |
Family
ID=90694418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311667424.9A Pending CN117905836A (en) | 2023-12-07 | 2023-12-07 | Air spring pressure maintaining valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117905836A (en) |
-
2023
- 2023-12-07 CN CN202311667424.9A patent/CN117905836A/en active Pending
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