Permanent magnet control electromagnetic valve with pressure maintaining function

Abstract

The utility model discloses a permanent magnet control electromagnetic valve with a pressure maintaining function. The permanent magnet control electromagnetic valve comprises an electromagnetic valve body and a pressure maintaining assembly. The electromagnetic valve body comprises an upper shell, a valve seat, a first coil and a first movable iron core. The upper end of the upper shell is communicated with a gas utilization unit; the valve seat is fixed on the upper shell; an air inlet hole and a first air outlet hole are respectively formed in the valve seat; the air inlet is communicated with an air source; the upper end of the first air outlet communicates with the air inlet, and the lower end of the first air outlet communicates with an inner cavity of the upper shell. The first movable iron core is sleeved in the upper shell below the valve seat in a sliding manner; the pressure maintaining assembly is arranged at the lower end of the upper shell; a first permanent magnet is arranged at the lower end of the first movable iron core; a second permanent magnet is arranged at the upper end of the pressure maintaining assembly; the ends, close to each other, of the first permanent magnet and the second permanent magnet have the same polarity; a pressure maintaining hole communicated with the upper shell is formed in the upper end of the pressure maintaining assembly; and the first coil is wound on the upper shell on the outer side of the first movable iron core.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a permanent magnet controlled electromagnetic valve with a pressure maintaining function. Background Art

[0002] The solenoid valve is the main regulating unit for controlling the airbag in the car seat. The solenoid valve used in the car seat is mainly used to control the inflation and deflation of the airbag. Its structure generally includes a bobbin, a spring, a coil, a movable iron core, an iron and a buckle, etc., and the movement of the movable iron core is controlled by energizing and de-energizing the coil, thereby achieving the purpose of controlling the inflation and deflation of the airbag connected to the solenoid valve. The existing solenoid valve has a relatively complex structure, a large volume, and high production and maintenance costs. In addition, it realizes inflation or deflation by moving the movable iron core, but does not have a pressure-maintaining function, has poor flexibility, and is difficult to meet actual usage needs. Utility Model Content

[0003] The purpose of the utility model is to provide a permanent magnet controlled solenoid valve with a pressure maintaining function. The permanent magnet controlled solenoid valve with a pressure maintaining function has a simple structure, a small size, and low production and maintenance costs. The pressure maintaining or air release can be achieved by controlling the closing or opening of the pressure maintaining hole through a pressure maintaining component. The valve has strong flexibility and good use effect.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A permanent magnet controlled solenoid valve with a pressure-maintaining function, comprising a solenoid valve body and a pressure-maintaining component; the solenoid valve body comprises an upper shell, a valve seat, a first coil and a first movable iron core; the upper end of the upper shell is connected to an air-using unit; the valve seat is fixed on the upper shell, and a gap is left between the inner wall of the upper shell and the valve seat; an air inlet and a first air outlet are respectively arranged in the valve seat; the air inlet is connected to an air source; the upper end of the first air outlet is connected to the air inlet, and the lower end of the first air outlet is connected to the inner cavity of the upper shell; the first movable iron core is slidably sleeved in the upper shell below the valve seat, and a gap is left between the first movable iron core and the inner wall of the upper shell gap; the pressure-maintaining component is arranged at the lower end of the upper shell; the first permanent magnet is arranged at the lower end of the first movable iron core, and the second permanent magnet is arranged at the upper end of the pressure-maintaining component; the first permanent magnet and the second permanent magnet are close to each other at one end with the same polarity, and the first movable iron core is driven to move up by the repulsive force of the second permanent magnet to close the first air outlet; the upper end of the pressure-maintaining component is provided with a pressure-maintaining hole connected with the upper shell; the first coil is wound on the upper shell outside the first movable iron core, and the first movable iron core is driven to move down to open the first air outlet by energizing the first coil, and the closing or opening of the pressure-maintaining hole is controlled by the pressure-maintaining component to achieve pressure maintenance or air release.

[0006] Furthermore, the pressure maintaining assembly includes a lower shell, a second coil and a second movable iron core; the lower shell is arranged at the lower end of the upper shell, and the upper shell and the lower shell are connected through a pressure maintaining hole; an exhaust hole is arranged on the lower shell below the pressure maintaining hole; the second movable iron core is slidably sleeved in the lower shell below the pressure maintaining hole, and the second permanent magnet attracts the second movable iron core to move upward to close the pressure maintaining hole; the second coil is wound on the lower shell outside the second movable iron core, and the second coil is energized to drive the second movable iron core to move downward to open the pressure maintaining hole and discharge the gas from the exhaust hole.

[0007] Furthermore, a third permanent magnet is disposed at the lower end of the second movable iron core, and the second movable iron core is magnetized by the third permanent magnet so that the second permanent magnet attracts the second movable iron core to move upward.

[0008] Furthermore, a silencer block is fixed in the upper shell body above the valve seat; and a plurality of silencer holes are arranged on the silencer block.

[0009] Furthermore, a sealing rubber block is fixed to the upper end of the first movable iron core; and a pressure-maintaining rubber block is fixed to the upper end of the second movable iron core.

[0010] Furthermore, a plurality of first card slots are provided at the lower end of the upper shell; a plurality of first buckles are provided on the outer side wall of the upper end of the lower shell, and the upper shell and the lower shell are tightly mounted together by embedding the first buckles into the first card slots.

[0011] Furthermore, sealing rubber rings are respectively provided on the lower shells below the first movable iron core and the second movable iron core; and an annular sealing convex strip is fixed to the upper end of the sealing rubber ring.

[0012] Furthermore, a compression spring is arranged in the pressure maintaining hole; the lower end of the compression spring abuts against the pressure maintaining hole, and the upper end of the compression spring abuts against the first movable iron core; a pressure maintaining spring is arranged below the second movable iron core; the lower end of the pressure maintaining spring is connected to the lower shell, and the upper end of the pressure maintaining spring abuts against the second movable iron core.

[0013] Furthermore, a second air outlet is provided in the valve seat; one end of the second air outlet is connected to the air inlet, and the other end of the second air outlet is connected to the air inlet of the adjacent valve seat.

[0014] Furthermore, the valve seat is provided with a plurality of second grooves at one end near the air inlet, and a plurality of second buckles are provided at one end near the second air outlet, and the adjacent valve seats are tightly connected together by embedding the second buckles into the second grooves of adjacent valve seats; a sealing ring is provided on the outer wall of the valve seat near the second air outlet.

[0015] After adopting the above technical solution, the utility model has the following beneficial effects:

[0016] 1. The utility model discloses a permanent magnet controlled solenoid valve with a pressure-maintaining function, which has a simple structure, a small size, and low production and maintenance costs. The pressure-maintaining hole can be closed or opened by controlling the pressure-maintaining component to maintain pressure or release air, and the utility model has strong flexibility and good use effect.

[0017] 2. The utility model discloses a permanent magnet controlled solenoid valve with a pressure-maintaining function. The first permanent magnet and the second permanent magnet are close to each other at one end and have the same polarity. The repulsive force of the second permanent magnet can drive the first movable iron core to move upward to close the first air outlet. A third permanent magnet is arranged at the lower end of the second movable iron core. The second movable iron core is magnetized by the third permanent magnet so that the second permanent magnet attracts the second movable iron core to move upward to close the pressure-maintaining hole. When inflation is required, the first coil is energized to drive the first movable iron core to move downward to open the first air outlet, and the gas passes through the air inlet, The first air outlet is used to inflate air bags and other air-using units from the upper end of the upper shell; after the inflation is completed, the first coil is energized, and the first movable iron core can be driven upward by the repulsive force of the second permanent magnet to close the first air outlet. At this time, the pressure-maintaining hole is also in a closed state, so that the pressure of air bags and other air-using units can be maintained; when deflation is required, the second movable iron core is driven downward by energizing the second coil to open the pressure-maintaining hole, and the gas in the air bags and other air-using units can pass through the upper shell, the pressure-maintaining hole, the lower shell and be discharged outward from the exhaust hole, so that the deflation of air bags and other air-using units can be achieved.

[0018] 3. The utility model provides a permanent magnet controlled solenoid valve with a pressure-maintaining function. A plurality of silencer holes are arranged on the silencer block, which can reduce the noise during inflation or deflation. In addition, the soft sealing rubber block, the pressure-maintaining rubber block and the sealing rubber ring can not only realize the soft contact of the first movable iron core or the second movable iron core, but also reduce the noise when the first air outlet and the pressure-maintaining hole are closed.

[0019] 4. The utility model provides a permanent magnet controlled solenoid valve with a pressure maintaining function, wherein the lower end of the compression spring abuts against the pressure maintaining hole, and the upper end of the compression spring abuts against the first movable iron core, which can further improve the sealing effect of the sealing rubber block at the upper end of the first movable iron core on the first air outlet; the lower end of the pressure maintaining spring is connected to the lower shell body, and the upper end of the pressure maintaining spring abuts against the second movable iron core, which can further improve the sealing effect of the pressure maintaining rubber block at the upper end of the second movable iron core on the pressure maintaining hole.

[0020] 5. The utility model provides a permanent magnet controlled solenoid valve with a pressure maintaining function. A plurality of second grooves are arranged at one end of the valve seat near the air inlet hole, and a plurality of second buckles are arranged at one end of the valve seat near the second air outlet hole. Adjacent valve seats can be tightly connected together by embedding the second buckles into the second grooves of adjacent valve seats. A plurality of permanent magnet controlled solenoid valves with a pressure maintaining function can be connected in series for use. When a plurality of permanent magnet controlled solenoid valves with a pressure maintaining function are used in series, the air inlet hole on the first valve seat is connected to the air source, and the second air outlet hole on the last valve seat is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic structural diagram of the parallel second air outlet of the utility model;

[0023] Figure 3 It is a schematic structural diagram of the vertically cut second air outlet of the utility model.

[0024] The reference numerals in the figure are as follows:

[0025] 1. Solenoid valve body; 11. Upper shell; 110. First slot; 111. Compression spring; 12. Valve seat; 120. Air inlet; 121. First air outlet; 122. Second air outlet; 123. Second slot; 124. Second buckle; 125. Sealing ring; 13. First coil; 14. First movable iron core; 140. First permanent magnet; 141. Sealing rubber block; 15. Silencing block; 150. Silencing hole; 2. Pressure-maintaining assembly; 20. Second permanent magnet; 21. Pressure-maintaining hole; 22. Lower shell; 220. Exhaust hole; 221. First buckle; 23. Second coil; 24. Second movable iron core; 240. Third permanent magnet; 241. Pressure-maintaining rubber block; 25. Pressure-maintaining spring; 3. Sealing rubber ring; 30. Sealing convex strip. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] See also Figures 1 to 3, a permanent magnet controlled solenoid valve with a pressure-maintaining function, comprising a solenoid valve body 1 and a pressure-maintaining component 2; the solenoid valve body 1 comprises an upper shell 11, a valve seat 12, a first coil 13 and a first movable iron core 14; the upper end of the upper shell 11 is connected to the gas unit; the valve seat 12 is fixed on the upper shell 11, and a gap is left between the inner wall of the upper shell 11 and the valve seat 12; an air inlet 120 and a first air outlet 121 are respectively arranged in the valve seat 12; the air inlet 120 is connected to an air source; the upper end of the first air outlet 121 is connected to the air inlet 120, and the lower end of the first air outlet 121 is connected to the inner cavity of the upper shell 11; the first movable iron core 14 is slidably sleeved in the upper shell 11 below the valve seat 12, and the first movable iron core 14 is connected to the upper shell 11 A gap is left between the inner walls; the pressure-maintaining component 2 is arranged at the lower end of the upper shell 11; a first permanent magnet 140 is arranged at the lower end of the first movable iron core 14, and a second permanent magnet 20 is arranged at the upper end of the pressure-maintaining component 2; the first permanent magnet 140 and the second permanent magnet 20 are close to each other at one end and have the same polarity, and the first movable iron core 14 is driven to move up by the repulsive force of the second permanent magnet 20 to close the first air outlet 121; a pressure-maintaining hole 21 connected to the upper shell 11 is arranged at the upper end of the pressure-maintaining component 2; the first coil 13 is wound on the upper shell 11 outside the first movable iron core 14, and the first movable iron core 14 is driven to move down to open the first air outlet 121 by energizing the first coil 13, and the closing or opening of the pressure-maintaining hole 21 is controlled by the pressure-maintaining component 2 to achieve pressure maintenance or air release.

[0028] like Figures 1 to 3 As shown, the pressure maintaining assembly 2 includes a lower shell 22, a second coil 23 and a second movable iron core 24; the lower shell 22 is arranged at the lower end of the upper shell 11, and the upper shell 11 and the lower shell 22 are connected through the pressure maintaining hole 21; an exhaust hole 220 is arranged on the lower shell 22 below the pressure maintaining hole 21; the second movable iron core 24 is slidably sleeved in the lower shell 22 below the pressure maintaining hole 21, and the second permanent magnet 20 attracts the second movable iron core 24 to move up to close the pressure maintaining hole 21; the second coil 23 is wound on the lower shell 22 outside the second movable iron core 24, and the second movable iron core 24 is driven to move downward to open the pressure maintaining hole 21 and discharge the gas from the exhaust hole 220 by energizing the second coil 23.

[0029] like Figures 1 to 3 As shown, a third permanent magnet 240 is disposed at the lower end of the second movable iron core 24, and the second movable iron core 24 is magnetized by the third permanent magnet 240 so that the second permanent magnet 20 attracts the second movable iron core 24 to move upward.

[0030] like Figures 1 to 3 As shown, a muffler block 15 is fixed in the upper shell 11 above the valve seat 12 ; a plurality of muffler holes 150 are provided on the muffler block 15 .

[0031] like Figures 1 to 3 As shown, a sealing rubber block 141 is fixed to the upper end of the first movable iron core 14 ; and a pressure-maintaining rubber block 241 is fixed to the upper end of the second movable iron core 24 .

[0032] like Figures 1 to 3 As shown, the lower end of the upper shell 11 is provided with a plurality of first card slots 110; the outer side wall of the upper end of the lower shell 22 is provided with a plurality of first buckles 221, and the upper shell 11 and the lower shell 22 are tightly mounted together by embedding the first buckles 221 into the first card slots 110.

[0033] like Figures 1 to 3 As shown, a sealing rubber ring 3 is provided on the lower shell 22 below the first movable iron core 14 and the second movable iron core 24 respectively; and an annular sealing convex strip 30 is fixed on the upper end of the sealing rubber ring 3 .

[0034] like Figures 1 to 3 As shown, a compression spring 111 is arranged in the pressure maintaining hole 21; the lower end of the compression spring 111 abuts against the pressure maintaining hole 21, and the upper end of the compression spring 111 abuts against the first movable iron core 14; a pressure maintaining spring 25 is arranged below the second movable iron core 24; the lower end of the pressure maintaining spring 25 is connected to the lower shell body 22, and the upper end of the pressure maintaining spring 25 abuts against the second movable iron core 24.

[0035] like Figures 1 to 3 As shown, a second air outlet 122 is provided in the valve seat 12 ; one end of the second air outlet 122 is communicated with the air inlet 120 , and the other end of the second air outlet 122 is communicated with the air inlet 120 of the adjacent valve seat 12 .

[0036] like Figures 1 to 3 As shown, the valve seat 12 is provided with a plurality of second grooves 123 at one end close to the air inlet hole 120, and a plurality of second buckles 124 are provided at one end close to the second air outlet hole 122. The second buckles 124 are embedded in the second grooves 123 of adjacent valve seats 12 to tightly connect adjacent valve seats 12 together; a sealing ring 125 is provided on the outer wall of the valve seat 12 close to the second air outlet hole 122.

[0037] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0038] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0039] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0040] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0041] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0042] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0043] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A permanent magnet controlled solenoid valve with pressure maintaining function, characterized in that: The invention comprises an electromagnetic valve body (1) and a pressure-maintaining component (2); the electromagnetic valve body (1) comprises an upper shell (11), a valve seat (12), a first coil (13) and a first movable iron core (14); the upper end of the upper shell (11) is connected to an air unit; the valve seat (12) is fixed on the upper shell (11), and a gap is left between the inner wall of the upper shell (11) and the valve seat (12); an air inlet (120) and a first air outlet (121) are respectively arranged in the valve seat (12); the air inlet (120) is connected to an air source; the upper end of the first air outlet (121) is connected to the air inlet (120), and the lower end of the first air outlet (121) is connected to the inner cavity of the upper shell (11); the first movable iron core (14) is slidably sleeved in the upper shell (11) below the valve seat (12), and a gap is left between the first movable iron core (14) and the inner wall of the upper shell (11). The pressure-maintaining component (2) is arranged at the lower end of the upper shell (11); the first permanent magnet (140) is arranged at the lower end of the first movable iron core (14), and the second permanent magnet (20) is arranged at the upper end of the pressure-maintaining component (2); the first permanent magnet (140) and the second permanent magnet (20) are close to each other at one end and have the same polarity, and the repulsive force of the second permanent magnet (20) drives the first movable iron core (14) to move upward to close the first air outlet (121); the upper end of the pressure-maintaining component (2) is provided with a pressure-maintaining hole (21) connected to the upper shell (11); the first coil (13) is wound on the upper shell (11) outside the first movable iron core (14), and the first movable iron core (14) is driven to move downward to open the first air outlet (121) by energizing the first coil (13), and the closing or opening of the pressure-maintaining hole (21) is controlled by the pressure-maintaining component (2) to achieve pressure maintenance or air release.

2. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 1, characterized in that: The pressure-maintaining component (2) comprises a lower shell (22), a second coil (23) and a second movable iron core (24); the lower shell (22) is arranged at the lower end of the upper shell (11), and the upper shell (11) and the lower shell (22) are connected through a pressure-maintaining hole (21); an exhaust hole (220) is arranged on the lower shell (22) below the pressure-maintaining hole (21); the second movable iron core (24) is slidably sleeved in the lower shell (22) below the pressure-maintaining hole (21), and the second permanent magnet (20) attracts the second movable iron core (24) to move upward to close the pressure-maintaining hole (21); the second coil (23) is wound on the lower shell (22) outside the second movable iron core (24), and the second movable iron core (24) is driven to move downward to open the pressure-maintaining hole (21) and exhaust gas from the exhaust hole (220) by energizing the second coil (23).

3. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 2, characterized in that: A third permanent magnet (240) is disposed at the lower end of the second movable iron core (24), and the second movable iron core (24) is magnetized by the third permanent magnet (240) so that the second permanent magnet (20) attracts the second movable iron core (24) to move upward.

4. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 1, characterized in that: A silencer block (15) is fixed inside the upper shell (11) above the valve seat (12); and a plurality of silencer holes (150) are provided on the silencer block (15).

5. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 2, characterized in that: A sealing rubber block (141) is fixed to the upper end of the first movable iron core (14); and a pressure-maintaining rubber block (241) is fixed to the upper end of the second movable iron core (24).

6. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 2, characterized in that: The lower end of the upper shell (11) is provided with a plurality of first card slots (110); the outer side wall of the upper end of the lower shell (22) is provided with a plurality of first card buckles (221), and the upper shell (11) and the lower shell (22) are tightly mounted together by inserting the first card buckles (221) into the first card slots (110).

7. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 2, characterized in that: A sealing rubber ring (3) is provided on the lower shell (22) below the first movable iron core (14) and the second movable iron core (24), respectively; an annular sealing convex strip (30) is fixed to the upper end of the sealing rubber ring (3).

8. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 2, characterized in that: A compression spring (111) is arranged in the pressure-maintaining hole (21); the lower end of the compression spring (111) abuts against the pressure-maintaining hole (21), and the upper end of the compression spring (111) abuts against the first movable iron core (14); a pressure-maintaining spring (25) is arranged below the second movable iron core (24); the lower end of the pressure-maintaining spring (25) is connected to the lower shell (22), and the upper end of the pressure-maintaining spring (25) abuts against the second movable iron core (24).

9. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 1, characterized in that: A second air outlet (122) is provided in the valve seat (12); one end of the second air outlet (122) is connected to the air inlet (120), and the other end of the second air outlet (122) is connected to the air inlet (120) of the adjacent valve seat (12).

10. A permanent magnet controlled solenoid valve with a pressure-maintaining function as claimed in claim 9, characterized in that: The valve seat (12) is provided with a plurality of second slots (123) at one end close to the air inlet (120), and a plurality of second buckles (124) are provided at one end close to the second air outlet (122). The second buckles (124) are embedded in the second slots (123) of adjacent valve seats (12) to tightly connect adjacent valve seats (12); and a sealing ring (125) is provided on the outer wall of the valve seat (12) close to the second air outlet (122).

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