Solenoid valve

Abstract

The present invention provides a solenoid valve including: a valve sleeve, which is hollow and has a first opening and a second opening spaced apart in the axial direction; a sealing seat, which is arranged in the valve sleeve and has a first flow channel opening in the axial direction for communicating with the first opening and a second flow channel opening in the radial direction for communicating with the second opening; a sealing rubber ring, which is provided with a conical protrusion for closing the second opening, the sealing rubber ring is arranged around the valve sleeve, the small end of the conical protrusion is used to insert into the second opening, and the conical protrusion of the sealing rubber ring has a first state of sealing the second opening and a second state of the conical protrusion being pushed open under fluid pressure. The solenoid valve of the present invention can meet flow requirements under different states.

Description

Technical Field

[0001] The invention relates to a solenoid valve. Background Art

[0002] Cars have become an indispensable means of transportation for almost every family. As people's living standards continue to improve, they have higher and higher requirements for driving comfort and stability. The air suspension system can automatically adjust the body posture according to different road conditions and driving requirements, meet the vehicle stability and passability under different road conditions, and improve driving comfort. Therefore, the birth of air suspension is also an inevitable product of social development.

[0003] Currently, most air suspension systems use air bags, air tanks and air compressors. The stiffness and height of the suspension are adjusted by controlling the air pressure in the air bags, providing comfort while maintaining good operating performance.

[0004] Compared with traditional suspension, air suspension has a more complex structure, and its failure probability and frequency are also higher. In addition, the existing solenoid valves used for air suspension have only a single connection method, which makes it difficult to meet the flow requirements under different conditions.

[0005] In view of this, it is necessary to improve the existing solenoid valve to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a solenoid valve to solve the problem that the existing solenoid valve has only a single connection mode.

[0007] To achieve the above object, the present invention provides a solenoid valve, comprising:

[0008] A valve sleeve, wherein the valve sleeve is hollow and has a first opening and a second opening spaced apart in the axial direction;

[0009] A sealing seat, the sealing seat is arranged in the valve sleeve and has a first flow channel opening in the axial direction for communicating with the first opening, and a second flow channel opening in the radial direction for communicating with the second opening;

[0010] A sealing rubber ring, wherein the sealing rubber ring is provided with a conical protrusion for closing the second opening, the sealing rubber ring is arranged around the valve sleeve, the small end of the conical protrusion is used to insert into the second opening, and the conical protrusion of the sealing rubber ring has a first state of sealing the second opening and a second state of being pushed open under fluid pressure;

[0011] A valve core is used to move axially to connect or disconnect the first opening and the first flow channel.

[0012] As a further improvement of the present invention, a mounting groove is provided on the valve sleeve, and the sealing rubber ring is accommodated in the mounting groove.

[0013] As a further improvement of the present invention, there are multiple conical protrusions.

[0014] As a further improvement of the present invention, the plurality of conical protrusions are arranged in a circular array.

[0015] As a further improvement of the present invention, the valve core includes a sealing head, a core rod connected to the sealing head, and a sealing gasket arranged on the sealing head toward the sealing seat, and the sealing gasket is used to abut against the first flow channel opening to close the first flow channel opening.

[0016] As a further improvement of the present invention, the solenoid valve further comprises a movable armature fixed to one end of the core rod away from the sealing head, a stationary armature spaced apart from the movable armature, and a return spring supported between the stationary armature and the movable armature.

[0017] As a further improvement of the present invention, both the static armature and the movable armature are provided with a receiving groove for receiving the return spring.

[0018] As a further improvement of the present invention, the core rod further comprises a fixing portion arranged at one end away from the sealing head, a fixing groove is provided on the movable armature, and the fixing portion is inserted into the fixing groove and has an interference fit with the movable armature.

[0019] As a further improvement of the present invention, an opening protrusion is provided on one end of the sealing seat facing the valve core, and the first flow channel opening is arranged at the opening protrusion.

[0020] The beneficial effects of the present invention are as follows: the solenoid valve of the present invention is provided with an axial first flow channel opening and a radial second flow channel opening on the sealing seat, which can realize the flow requirements in different directions, and the sealing rubber ring can realize the one-way sealing effect to meet the flow requirements under different states. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the solenoid valve of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of the solenoid valve of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a valve sleeve of a solenoid valve of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a sealing seat of a solenoid valve of the present invention;

[0025] Figure 5It is a structural schematic diagram of the sealing seat of the solenoid valve of another angle of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a sealing rubber ring of a solenoid valve of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the valve core of the solenoid valve of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1 to 7 As shown, the solenoid valve 100 of the present invention includes a valve sleeve 1, a sealing seat 2, an O-ring 3, a sealing rubber ring 4, a valve core 5, a movable armature 6, a static armature 7, a return spring 8, a coil 9 and a valve body 10.

[0032] like Figure 2 and Figure 3 As shown, the valve sleeve 1 is hollow and is provided with a first opening 11 and a second opening 12 spaced apart in the axial direction. Both the first opening 11 and the second opening 12 are communicated with the middle of the valve sleeve 1 .

[0033] like Figure 2 , Figure 4 and Figure 5 As shown, the sealing seat 2 is arranged in the valve sleeve 1, and has a first flow channel opening 21 in the axial direction for communicating with the first opening 11, a second flow channel opening 22 in the radial direction for communicating with the second opening 12, and a P flow channel opening 23 for communicating with the first flow channel opening 21 and the second flow channel opening 22.

[0034] A stopper 24 is protruding outward from the outer circumference of the sealing seat 2 , one end of the sealing seat 2 protrudes into the valve sleeve 1 , and the P flow channel opening 23 is exposed outside the valve sleeve 1 , and the stopper 24 abuts against the valve sleeve 1 along the axial direction.

[0035] The O-ring 3 is disposed around the sealing seat 2. Specifically, the O-ring 3 is disposed at one end of the limit block 24 away from the valve sleeve 1 to isolate the P flow channel port 23 from the first opening 11 and the second opening 12 from the outside.

[0036] An opening protrusion 25 is formed at one end of the sealing seat 2 facing the valve core 5 , and the first flow channel opening 21 is disposed at the opening protrusion 25 .

[0037] like Figure 2 and Figure 6 As shown, the sealing rubber ring 4 is provided with a conical protrusion 41 for closing the second opening 12. The sealing rubber ring 4 is arranged around the valve sleeve 1, and the small end of the conical protrusion 41 is used to insert into the second opening 12. The conical protrusion 41 of the sealing rubber ring 4 has a first state of sealing the second opening 12 and a second state of being pushed open under fluid pressure.

[0038] The valve core 5 is used to move in the axial direction to connect or disconnect the first opening 11 and the first flow channel opening 21. Specifically, the valve core 5 is used to abut against the opening protrusion 25 or to be separated from the opening protrusion 25.

[0039] In this embodiment, a mounting groove 13 is provided on the valve sleeve 1 , and the sealing rubber ring 4 is received in the mounting groove 13 , thereby preventing the sealing rubber ring 4 from being separated from the valve sleeve 1 .

[0040] The number of the conical protrusions 41 is multiple, such as two, three, four, etc. The multiple conical protrusions 41 are arranged in a circular array. In this embodiment, the number of the second openings 12 and the number of the conical protrusions 41 are both two. However, in other embodiments, it is also feasible that the number of the conical protrusion 41 is one.

[0041] The conical protrusion 41 and the sealing rubber ring 4 are obtained by injection molding.

[0042] The sealing rubber ring 4 is made of elastic rubber materials such as EPDM (ethylene propylene diene monomer rubber), HNBR (hydrogenated nitrile rubber), FKM or FPM (fluororubber), and has high resilience and tension characteristics, which can improve the sealing and flexibility, and facilitate the opening of the conical protrusion 41. Preferably, EPDM is used, which has excellent characteristics such as low cost, aging resistance, corrosion resistance, and a wide applicable temperature range. It is a thermoplastic material with high permeability and strength, can control the penetration of the medium, and has excellent flexibility and excellent corrosion resistance.

[0043] like Figure 2 and Figure 7 As shown, the valve core 5 includes a sealing head 51 , a core rod 52 connected to the sealing head 51 , and a sealing gasket 53 arranged on the sealing head 51 facing the sealing seat 2 .

[0044] The sealing head 51 and the sealing pad 53 are combined into a whole by using a vulcanization process, and the sealing head 51 and the core rod 52 are made of metal materials. The vulcanization process avoids the risk of the sliding valve structure being easily stuck by the plane sealing feature.

[0045] The sealing gasket 53 is used to abut against the first flow channel opening 21 to close the first flow channel opening 21 .

[0046] The movable armature 6 is fixed to the end of the core rod 52 away from the sealing head 51. In this embodiment, the core rod 52 further includes a fixing portion 54 arranged at the end away from the sealing head 51. The movable armature 6 is provided with a fixing groove 61. The fixing portion 54 is inserted into the fixing groove 61 and is interference-fitted with the movable armature 6. The valve core 5 is integrated with the movable armature 6 by interference press fitting, thereby improving the control stability of the solenoid valve 100.

[0047] The stationary armature 7 is spaced apart from the movable armature 6, the return spring 8 is held between the stationary armature 7 and the movable armature 6, and the stationary armature 7 is arranged on a side of the movable armature 6 away from the valve core 5. The stationary armature 7 and the movable armature 6 are both provided with a receiving groove for receiving the return spring 8.

[0048] When the coil 9 is not energized, the return spring 8 abuts against the movable armature 6 , thereby abutting the valve core 5 against the first flow channel opening 21 .

[0049] When the coil 9 is energized, the stationary armature 7 can be energized, thereby driving the movable armature 6 to move toward the stationary armature 7 , so that the valve core 5 is separated from the first flow channel opening 21 .

[0050] The working principle of the solenoid valve 100 of the present invention is as follows:

[0051] In actual use, according to different customer needs, the sealing gasket 53 and the sealing rubber ring 4 will set their own pressure resistance values ​​to achieve flow requirements under different pressures. The pressure resistance values ​​can be the same or different. When the medium enters from the sealing seat 2 and the pressure is greater than their respective pressure resistance values, the sealing gasket 53 and the sealing rubber ring 4 will each open the sealed channel to achieve flow adjustment requirements under different pressures.

[0052] When the medium enters from the sealing seat 2, if no power is supplied, and the pressure of the gas medium at the P flow channel port 23 is less than or equal to a certain pressure value, the valve core 5 and the movable armature 6 are pressed against the sealing seat 2 together under the elastic force of the return spring 8, and the sealing gasket 53 of the valve core 5 is pressed and sealed with the opening protrusion 25 of the sealing seat 2, and the sealing rubber ring 4 is pressed into the mounting groove 13 of the valve sleeve 1 by its own tension, and the conical protrusion 41 is pressed into the second opening 12 to play a radial seal. At this time, the sealing seat 2 and the inner cavity of the valve sleeve 1 are not connected to each other, that is, the solenoid valve 100 can withstand a certain gas pressure to keep the valve closed; when the pressure of the medium at the P flow channel port 23 is greater than the pressure resistance value of the sealing gasket 53 and / or the sealing rubber ring 4, the corresponding channel sealing channel will be opened, that is, the solenoid valve 100 can open automatically without power supply, thereby playing a role of safe pressure relief.

[0053] When the medium enters from the sealing seat 2 and is energized, the movable armature 6 drives the valve core 5 to slide in the valve sleeve 1 in the direction of overcoming the spring force of the return spring 8 under the action of the electromagnetic force, and the end face sealing gasket 53 of the valve core 5 is separated from the opening protrusion 25 on the sealing seat 2, and the air pressure in the sealing seat 2 enters the cavity of the valve sleeve 1 through the first flow channel 21, that is, in the absence of pressure, the solenoid valve 100 can also be opened in the energized state; at the same time, if the pressure of the P flow channel 23 is greater than the pressure resistance value of the sealing rubber ring 4 at this time, the sealing rubber ring 4 is expanded by the air pressure, and the conical protrusion 41 elastically rebounds and loosens from the second opening 12. When the air pressure exceeds the elastic force of the sealing rubber ring 4 itself, it expands under the action of the air pressure to overcome the elastic force, the sealing pressure is reduced, the sealing is lost and the valve is turned on, and the gas in the sealing seat 2 enters the cavity of the valve sleeve 1 through the second opening 12 and the second flow channel 22. At this time, the total flow rate is the sum of the flow rates of the first flow channel 21 and the second flow channel 22. If the pressure at the P flow channel opening 23 is lower than the withstand pressure of the sealing rubber ring 4 , the sealing rubber ring 4 still seals the second opening 12 , and the total flow rate is the flow rate of the first flow channel opening 21 .

[0054] When the medium enters from the valve sleeve 1, no matter how much atmospheric pressure is passed, when no electricity is applied, under the action of the spring force and the air pressure, the sealing gasket 53 of the valve core 5 is pressed tightly against the opening protrusion 25, and the sealing rubber ring 4 is pressed tightly against the mounting groove 13 of the valve sleeve 1 under the action of the air pressure and its own tension. At this time, the sealing seat 2 and the inner cavity of the valve sleeve 1 are not connected to each other;

[0055] When the medium enters from the valve sleeve 1 and is energized, the sealing rubber ring 4 is still pressed tightly in the mounting groove 13 of the valve sleeve 1 under the action of gas pressure and its own tension. The movable armature 6 overcomes the spring force and gas pressure under the action of electromagnetic force, and drives the valve core 5 to move in the valve sleeve 1 toward the static armature. The end face sealing gasket 53 of the valve core 5 is separated from the opening protrusion 25 on the sealing seat 2. The medium enters the cavity of the valve sleeve 1 through the first opening 11 from the outside of the valve sleeve 1, and then enters the P flow channel 23 through the first flow channel 21.

[0056] Because the sealing rubber ring 4 is still pressed in the direction of the valve sleeve 1 by the gas pressure at this time, the greater the gas pressure, the greater the pressing force, and the second opening 12 is always in a compressed and sealed state. At this time, only the axial channel is open, and the flow rate is only the flow rate of the axial channel.

[0057] From the above description, it can be seen that the present application can use the one-way throttling effect of the sealing rubber ring 4 to meet the flow requirements of customers under different conditions.

[0058] The solenoid valve 100 of the present invention is provided with an axial first flow channel opening 21 and a radial second flow channel opening 22 on the sealing seat 2 to meet the flow requirements in different directions. The sealing rubber ring 4 can achieve a one-way sealing effect to meet the flow requirements under different states.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0060] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A solenoid valve, characterized in that: The solenoid valve (100) comprises: A valve sleeve (1), the valve sleeve (1) being hollow and having a first opening (11) and a second opening (12) spaced apart in the axial direction; a sealing seat (2), the sealing seat (2) being arranged in the valve sleeve (1) and having a first flow channel opening (21) in the axial direction for communicating with the first opening (11), a second flow channel opening (22) in the radial direction for communicating with the second opening (12), and a P flow channel opening (23) in communication with the first flow channel opening (21) and the second flow channel opening (22), one end of the sealing seat (2) protruding into the valve sleeve (1), while the P flow channel opening (23) is exposed outside the valve sleeve (1); a sealing rubber ring (4), wherein the sealing rubber ring (4) is provided with a conical protrusion (41) for closing the second opening (12); the sealing rubber ring (4) is arranged around the valve sleeve (1); the small end of the conical protrusion (41) is used to be inserted into the second opening (12); the conical protrusion (41) of the sealing rubber ring (4) has a first state in which the second opening (12) is sealed, and a second state in which the conical protrusion (41) is pushed open under fluid pressure; A valve core (5), the valve core (5) being used to move axially to connect or disconnect the first opening (11) and the first flow channel opening (21).

2. The solenoid valve according to claim 1, characterized in that: The valve sleeve (1) is provided with a mounting groove (13), and the sealing rubber ring (4) is accommodated in the mounting groove (13).

3. The solenoid valve according to claim 2, characterized in that: The number of the conical protrusions (41) is plural.

4. The solenoid valve according to claim 3, characterized in that: The plurality of conical protrusions (41) are arranged in a circular array.

5. The solenoid valve according to claim 1, characterized in that: The valve core (5) comprises a sealing head (51), a core rod (52) connected to the sealing head (51), and a sealing gasket (53) arranged on the sealing head (51) facing the sealing seat (2), wherein the sealing gasket (53) is used to abut against the first flow channel opening (21) to close the first flow channel opening (21).

6. The solenoid valve according to claim 5, characterized in that: The solenoid valve (100) further comprises a movable armature (6) fixed to one end of the core rod (52) away from the sealing head (51), a stationary armature (7) spaced apart from the movable armature (6), and a return spring (8) supported between the stationary armature (7) and the movable armature (6).

7. The solenoid valve according to claim 6, characterized in that: The static armature (7) and the movable armature (6) are both provided with a receiving groove for receiving the return spring (8).

8. The solenoid valve according to claim 6, characterized in that: The core rod (52) further comprises a fixing portion (54) arranged at one end away from the sealing head (51), the movable armature (6) is provided with a fixing groove (61), and the fixing portion (54) is inserted into the fixing groove (61) and is interference-fitted with the movable armature (6).

9. The solenoid valve according to claim 1, characterized in that: An opening protrusion (25) is provided at one end of the sealing seat (2) facing the valve core (5), and the first flow channel opening (21) is arranged at the opening protrusion (25).

Images