Exhaust valve

Abstract

The invention discloses an exhaust valve, and belongs to the technical field of automobile parts. The exhaust valve comprises a valve body, a static iron core, a spring, a movable iron core, a sealing head and a first airtight assembly, the valve body is provided with an air channel, the static iron core is fixedly arranged relative to the valve body, the movable iron core is fixedly connected with the sealing head, and the movable iron core and the sealing head are movably inserted into the valve body; the spring is pressed between the static iron core and the movable iron core in an abutting mode and used for pushing the iron core and the sealing head to penetrate into the valve body when the static iron core is not powered on, so that the sealing head is inserted into the air channel, and the air channel is cut off. The static iron core is used for generating magnetic force when powered on to attract the movable iron core and the sealing head to retreat from the valve body to open the air channel, the first airtight assembly is arranged on the movable iron core in a sleeving mode and used for sealing a gap between the movable iron core and the valve body, and therefore the sectional area of compressed air borne by the sealing head and the movable iron core is reduced, and electromagnetic force needed by the electromagnetic valve is reduced. The function that the small coil and the electromagnetic valve can exhaust high-pressure gas is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an exhaust valve. Background Art

[0002] With the popularity of air suspension products in the automotive industry, the market's requirements for the capabilities and cost control of air suspension products are increasing.

[0003] The air suspension system adjusts the suspension state of the vehicle through compressed gas generated by the air compressor. These gases are transported to the gas chambers of the springs and shock absorbers. By adjusting the gas pressure, the height of the vehicle body and the degree of hardness of the suspension can be changed. Therefore, the air compressor assembly is a key component in the air suspension system to achieve the adjustable height and stiffness functions. Although the air compressor exhaust valve on the market can meet the pressure regulation and exhaust of the air compressor, it still has the disadvantages of requiring an actuator to realize the exhaust function, being large in size and occupying layout space, and having many parts and high costs.

[0004] Therefore, there is a need for an exhaust valve structure that does not require an actuator, has a small size and a small number of parts and can also achieve an exhaust function. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an exhaust valve structure which does not require an actuator, has a small size and a small number of parts, and can also achieve an exhaust function.

[0006] The present invention provides an exhaust valve, comprising a valve body, a static iron core, a spring, a moving iron core, a sealing head and a first airtight component, wherein the valve body is provided with an air passage, the static iron core is fixedly arranged relative to the valve body, the moving iron core is fixedly connected to the sealing head, and the moving iron core and the sealing head are movably inserted into the valve body, and the spring is pressed between the static iron core and the moving iron core; the spring is used to push the iron core and the sealing head into the valve body when the static iron core is not energized, so that the sealing head is inserted into the air passage to cut off the air passage; the static iron core is used to generate a magnetic force to attract the moving iron core and the sealing head to withdraw from the valve body to open the air passage when energized, and the first airtight component is sleeved on the moving iron core to seal the gap between the moving iron core and the valve body.

[0007] Optionally, the moving iron core is provided with a sealing head mounting hole, a connecting hole and a spring mounting hole which are connected in sequence, the spring is partially embedded in the spring mounting hole, and the sealing head is partially embedded in the sealing head mounting hole.

[0008] Optionally, the first airtight component includes a sealing ring sleeved on the moving iron core and a fixing ring sleeved outside the sealing ring.

[0009] Optionally, the outer surface of the fixing ring partially protrudes to form an annular supporting flange, and the sealing ring is supported on the supporting flange.

[0010] Optionally, one end of the sealing ring expands radially outward to form a connecting ring, the outer surface of the connecting ring is in an arc shape, and the outer edge of the connecting ring is folded toward the other end of the sealing ring to form an annular lip surrounding the outside of the sealing ring and spaced apart from the sealing ring.

[0011] Optionally, the fixing ring is made of metal, the sealing ring is made of rubber, and the fixing ring is fixedly connected to the sealing ring.

[0012] Optionally, the sealing head includes a sealing gasket and a sealing gasket frame, the sealing gasket is sleeved on the end of the sealing gasket frame, and the sealing gasket frame is connected between the moving iron core and the sealing gasket.

[0013] Optionally, the sealing gasket skeleton is provided with a vent hole connected to the sealing head mounting hole and the airway flow.

[0014] Optionally, the exhaust valve further comprises a second airtight component respectively mounted on the fixing ring and the valve body and used for maintaining the pressure of the space outside the valve body when the air passage is cut off.

[0015] Optionally, the valve body includes a magnetic isolation sleeve and an air nozzle connected to the air passage, and the magnetic isolation sleeve is sleeved on the outside of the static iron core and the movable iron core and is clamped with the air nozzle.

[0016] By adopting the above technical scheme, the outer surface of the connecting ring extending from the sealing ring sleeved on the moving iron core is in an arc shape. This structure can achieve a tight fit with the moving iron core on the one hand, and on the other hand, it also increases the fitting area with the valve body, so that the compressed gas cannot enter the gap between the moving iron core and the valve body, reducing the cross-sectional area of ​​the compressed air borne by the sealing head and the moving iron core assembly, reducing the lifting force required for the sealing head to open the exhaust air duct, and reducing the electromagnetic force required for the static iron core, thereby realizing the function of a smaller coil and exhaust valve to discharge high-pressure gas. At the same time, the pressure balance hole formed by the spring mounting hole, the connecting hole, the sealing head mounting hole and the air vent in the sealing head in the moving iron core, when there is a slight leakage in the first airtight assembly and compressed air exists in the upper chamber of the moving iron core, the exhaust air duct on the valve body connected to the atmosphere can keep the upper chamber of the solenoid valve under the atmospheric pressure of the normal environment through the pressure balance hole, thereby increasing the reliability of the exhaust valve and meeting the use needs under more working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional view of the overall structure of the exhaust valve in the embodiment provided by the present invention; Figure 2 A schematic diagram of the overall structure and appearance of the exhaust valve in the embodiment provided by the present invention; Figure 3 A schematic diagram of a top view of the sealing ring in an embodiment of the present invention; Figure 4A bottom view schematic diagram of the sealing ring in the embodiment provided by the present invention; Figure 5 A schematic diagram of the main structure of a fixing ring in an embodiment provided by the present invention; Figure 6 A schematic diagram of a top view of the fixing ring in an embodiment of the present invention; Figure 7 A schematic diagram of the installation position of the first airtight component in the embodiment provided by the present invention; Figure 8 This is a schematic diagram of the sealing head installation position in the embodiment provided by the present invention.

[0018] The meanings of the reference numbers in the figure are as follows: 10-valve body, 11-air nozzle, 12-magnetic isolation sleeve, 111-exhaust air duct, 112-intake air duct, 113-first airtight component mounting groove, 114-sealing gasket mounting groove, 20-static iron core, 21-static iron spring mounting hole, 30-spring, 40-moving iron core, 41-moving iron inner spring mounting hole, 42-connecting hole, 43-sealing head mounting hole, 50-sealing head, 51-sealing gasket, 511-sealing gasket skeleton mounting hole, 52-sealing gasket skeleton, 521-vent, 60-first airtight component, 61-sealing ring, 611 sealing ring body, 612-connecting ring, 613-annular lip, 62-fixing ring, 621-fixing ring body, 622-supporting flange, 70-second airtight component. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Unless otherwise clearly specified and limited, the terms "disposed", "installed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0023] Figure 1 It is a schematic cross-sectional view of the overall structure of the exhaust valve in the embodiment provided by the present invention. Figure 2 This is a schematic diagram of the overall structural appearance of the exhaust valve in the embodiment provided by the present invention.

[0024] like Figure 1 and 2 As shown, this embodiment provides an exhaust valve, which includes a valve body 10, a static iron core 20, a spring 30, a movable iron core 40, a sealing head 50, a first airtight component 60 and a second airtight component 70.

[0025] The valve body 10 is provided with an air passage, and the valve body 10 includes a magnetic isolation sleeve 12 and an air nozzle 11 connected to the air passage. The air nozzle 11 is a columnar structure, and the magnetic isolation sleeve 12 is a hollow columnar structure. The magnetic isolation sleeve 12 is sleeved on the outside of the static iron core 20 and the moving iron core 40 and is clamped with the air nozzle 11. Specifically, the side wall of the air nozzle 11 is provided with an air intake passage 112, and the number of the air intake passages 112 is multiple, and the present embodiment is preferably four. The air nozzle 11 is axially provided with a first airtight component installation groove 113, a sealing gasket installation groove 114 and an exhaust air passage 111 that are connected in sequence, and the side wall is provided with a connecting flange extending radially outward, and the magnetic isolation sleeve 12 is clamped on the outside of the connecting flange. A U-shaped groove is provided on the bottom surface of the sealing gasket installation groove 114. This design reduces the sealing area between the sealing gasket 51 and the bottom end of the sealing gasket installation groove 114, reduces the risk of sealing failure of the first airtight component 60, and reduces costs at the same time. The stationary iron core 20 is fixedly arranged relative to the valve body 10 , the moving iron core 40 is fixedly connected to the sealing head 50 , and the moving iron core 40 and the sealing head 50 are movably inserted into the valve body 10 .

[0026] The static iron core 20 is a columnar structure, and a spring mounting hole 21 is axially provided on one end face thereof. The static iron core 20 is used to generate a magnetic force to attract the moving iron core 40 and the sealing head 50 to withdraw from the valve body 10 and open the exhaust air duct 111 when power is turned on. The moving iron core 40 is a columnar structure, and a sealing head mounting hole 43, a connecting hole 42 and a spring mounting hole 41 are axially provided, which are connected in sequence. The connecting hole 42 is used to input the high-pressure gas in the spring mounting hole 41 in the moving iron core into the sealing head mounting hole 43. The spring mounting hole 41, the connecting hole 42 and the sealing head mounting hole 43 in the moving iron core together constitute the air duct of the moving iron core 40. One end where the sealing head mounting hole 43 is connected to the connecting hole 42 is a trumpet-shaped structure. This design is conducive to increasing the air flow velocity entering the sealing head mounting hole 43 and reducing the resistance of the gas entering the sealing head mounting hole 43 from the connecting hole 42.

[0027] The spring 30 is pressed between the static iron core 20 and the moving iron core 40. One end of the spring is sleeved on the static iron core 20 through the spring mounting hole 21 in the static iron core 20, and the other end is partially embedded in the spring mounting hole 41 in the moving iron core. The spring 30 is used to push the moving iron core 40 and the sealing head 50 into the valve body 10 when the static iron core 20 is not energized, so that the sealing head 50 is inserted into the exhaust air duct 111 to cut off the exhaust air duct 111.

[0028] Figure 3 This is a schematic diagram of the top view of the sealing ring in the embodiment provided by the present invention. Figure 4 This is a bottom view of the structure of the sealing ring in the embodiment provided by the present invention. Figure 5 This is a schematic diagram of the front structural view of the fixing ring in the embodiment provided by the present invention. Figure 6 This is a schematic diagram of the top view of the fixing ring in the embodiment provided by the present invention. Figure 7 This is a schematic diagram of the installation location of the first airtight component in the embodiment provided by the present invention.

[0029] The first airtight component 60 is sleeved on the moving iron core 40 to seal the gap between the moving iron core 40 and the valve body 10. The first airtight component 60 includes a sealing ring 61 sleeved on the moving iron core 40 and a fixing ring 62 sleeved outside the sealing ring 61. The fixing ring 62 is made of metal, and the sealing ring 61 is made of rubber. The two are fixedly connected by a rubber vulcanization process. This connection method makes the fixing ring 62 and the sealing ring 61 highly adhered, and the sealing performance is better. The fixing ring 62 includes a fixing ring body 611 and a supporting flange 622. The supporting flange 622 is an annular structure formed by partially protruding from the outer surface of the fixing ring body 611. The annular lip 613 of the sealing ring 61 and the edge of the end face of the air nozzle 11 are supported on the supporting flange 622. The sealing ring 61 includes a cylindrical sealing ring body 611, a connecting ring 612 and an annular lip 613 connected in one piece. The edge of one end face of the sealing ring body 611 is radially turned inward to form an inclined surface. This structural design can achieve a close fit between the end face edge of the sealing ring body 611 and the side wall of the moving iron core 40. The connecting ring 612 is formed by radially expanding one end of the sealing ring body 611 outward. The outer surface of the connecting ring 612 is in an arc shape. The annular lip 613 surrounds the outside of the sealing ring 61 and is spaced from the sealing ring 61. The outer edge of the connecting ring 612 is folded toward the direction where the other end of the sealing ring 61 is located. The arc-shaped connecting ring 612 and the annular lip 613 are in close fit with the first airtight component installation groove 113 in the air nozzle 11, thereby preventing gas from entering the gap between the moving iron core 40 and the magnetic isolation sleeve 12, that is, preventing gas from entering the upper cavity area of ​​the moving iron core 40, ensuring that the spring 30 is not subjected to downward pressure.

[0030] Figure 8 This is a schematic diagram of the installation position of the sealing head 50 in the embodiment provided by the present invention.

[0031] The sealing head 50 is partially embedded in the sealing head mounting hole 43. The sealing head 50 includes a sealing gasket 51 and a sealing gasket frame 52. The sealing gasket 51 is arranged in the sealing gasket mounting groove 114 in the valve body 10 and abuts against the exhaust air duct 111. The diameter of the sealing gasket 51 is smaller than the aperture of the sealing gasket mounting groove 114 and larger than the aperture of the exhaust air duct 111. This design can ensure that when the sealing head 50 is lifted, the high-pressure gas can flow from the side of the sealing gasket 51 and then be discharged through the exhaust air duct 111. The surface of the sealing gasket 51 abutting against the exhaust air duct 111 is provided with a sealing gasket frame mounting hole 511, and the sealing gasket 51 is sleeved on the end of the sealing gasket frame 52 through the sealing gasket frame mounting hole 511. The sealing gasket 51 is made of rubber, and the sealing gasket frame 52 is made of metal, such as a sealing gasket frame made of aluminum or iron. One end of the sealing gasket frame 52 is interference-connected with the moving iron core 40, and the other end is connected to the rubber sealing gasket 51 through a rubber vulcanization process. The sealing gasket frame 52 is provided with a vent hole 521 which is in fluid connection with the sealing head mounting hole 43 and the exhaust air passage 111. The vent hole 521 is in fluid connection with the air passage of the moving iron core 40. The air passage of the moving iron core 40 and the vent hole 521 form a pressure balance hole of the exhaust valve. When the sealing ring 61 fails or leaks, the gas entering the gap between the moving iron core 40 at the upper end of the sealing ring 61 and the magnetic isolation valve is discharged through the pressure balance hole.

[0032] The second airtight member is respectively installed on the upper end of the supporting flange 622 , the side wall of the air nozzle 11 and the outer wall of the magnetic isolation sleeve 12 , and is used to maintain the pressure of the space outside the valve body 10 when the sealing head 50 is inserted into the air passage.

[0033] It can be seen from the above embodiments that the outer surface of the connecting ring 612 is in an arc shape, and the inwardly folded inclined surface at the lower end of the sealing ring body 611 can not only achieve a tight fit with the moving iron core 40, but also increase the sealing area with the air nozzle 11, so that the compressed gas cannot enter the gap between the moving iron core 40 and the magnetic isolation sleeve 12, thereby reducing the cross-sectional area of ​​the compressed air borne by the sealing head 50 and the moving iron core 40 assembly, reducing the lifting force required for the sealing head 50 to open the exhaust air duct 111, and reducing the electromagnetic force required for the static iron core 20, thereby achieving a smaller The coil and the magnet can discharge the high-pressure gas. At the same time, the pressure balance hole formed by the spring mounting hole 41, the connecting hole 42, the sealing head mounting hole 43 and the vent hole 521 in the sealing head 50 in the moving iron can prevent the gas from entering the gap between the moving iron core 40 and the magnetic isolation sleeve 12 due to a slight leakage in the first airtight component 60. The pressure balance hole connected to the atmosphere can keep the gap between the moving iron core 40 and the magnetic isolation sleeve 12 under the atmospheric pressure of the normal environment, thereby increasing the reliability of the exhaust valve and meeting the use needs under more working conditions.

[0034] In addition, the exhaust valve involved in this embodiment can directly realize the exhaust function without the cooperation of an actuator, which reduces the cost and product volume. At the same time, the number of parts of the product is small, which reduces the cost and improves the reliability.

[0035] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An exhaust valve, characterized in that: The valve body (10) comprises a valve body (10), a static iron core (20), a spring (30), a moving iron core (40), a sealing head (50) and a first airtight component (60), wherein the valve body (10) is provided with an air passage, the static iron core (20) is fixedly arranged relative to the valve body (10), the moving iron core (40) is fixedly connected to the sealing head (50), and the moving iron core (40) and the sealing head (50) are movably inserted into the valve body (10), and the spring (30) is pressed between the static iron core (20) and the moving iron core (40); The spring (30) is used to push the moving iron core (40) and the sealing head (50) into the valve body (10) when the static iron core (20) is not energized, so that the sealing head (50) is inserted into the air passage to cut off the air passage; the static iron core (20) is used to generate a magnetic force to attract the moving iron core (40) and the sealing head (50) to withdraw from the valve body (10) to open the air passage when energized, and the first airtight component (60) is sleeved on the moving iron core (40) to seal the gap between the moving iron core (40) and the valve body (10).

2. The exhaust valve according to claim 1, characterized in that: The moving iron core (40) is provided with a sealing head mounting hole (43), a connecting hole (42), and a spring mounting hole which are connected in sequence; the spring (30) is partially embedded in the spring mounting hole; and the sealing head (50) is partially embedded in the sealing head mounting hole (43).

3. The exhaust valve according to claim 1, characterized in that: The first airtight component (60) comprises a sealing ring (61) sleeved on the moving iron core (40) and a fixing ring (62) sleeved outside the sealing ring (61).

4. The exhaust valve according to claim 3, characterized in that: The outer surface of the fixing ring (62) is partially protruding to form an annular supporting flange (622), and the sealing ring (61) is supported on the supporting flange (622).

5. The exhaust valve according to claim 4, characterized in that: One end of the sealing ring (61) expands radially outward to form a connecting ring (612); the outer surface of the connecting ring (612) is in an arc shape; the outer edge of the connecting ring (612) is folded in the direction of the other end of the sealing ring (61) to form an annular lip (613) surrounding the outside of the sealing ring (61) and spaced apart from the sealing ring (61).

6. The exhaust valve according to claim 5, characterized in that The fixing ring (62) is made of metal, the sealing ring (61) is made of rubber, and the fixing ring (62) is fixedly connected to the sealing ring (61).

7. The exhaust valve according to claim 1, characterized in that The sealing head (50) comprises a sealing gasket (51) and a sealing gasket frame (52); the sealing gasket (51) is sleeved on the end of the sealing gasket frame (52); and the sealing gasket frame (52) is connected between the moving iron core (40) and the sealing gasket (51).

8. The exhaust valve according to claim 7, characterized in that: The sealing pad skeleton (52) is provided with a vent hole (521) which is fluidly connected to the sealing head mounting hole (43) and the airway.

9. The exhaust valve according to claim 1, characterized in that: The exhaust valve further comprises a second airtight component (70) mounted on the fixing ring (62) and the valve body (10) respectively and used for maintaining the pressure of the space outside the valve body (10) when the air passage is cut off.

10. The exhaust valve according to claim 1, characterized in that The valve body (10) comprises a magnetic isolation sleeve (12) and an air nozzle (11) connected to the air passage; the magnetic isolation sleeve (12) is sleeved outside the static iron core (20) and the movable iron core (40) and is clamped with the air nozzle (11).

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