Two-position three-way pneumatic electromagnetic valve

Abstract

The utility model discloses a two-position three-way pneumatic electromagnetic valve which comprises a framework, a coil is wound on the outer wall of the framework, a cavity is formed in the framework, an armature is arranged in the cavity, airflow channels are formed in the outer wall of the armature and the inner wall of the cavity, a working opening communicated with the airflow channels is formed in the side wall of the framework, and an air leakage opening is formed in the bottom of the cavity. A cavity is formed in the armature, a static core is arranged at an opening in the top of the cavity, an air inlet is formed in the static core, a stepped hole is formed in the side, facing the static core, of the armature, a sealing plug and a first spring are arranged in the stepped hole, the first spring is used for jacking the sealing plug to seal the air inlet, and a second spring is arranged between the stepped hole and the static core; according to the two-position three-way pneumatic electromagnetic valve, the function of a one-way valve is integrated into the electromagnetic valve, the structure is simple, integrated combination is achieved, elements and space are saved, pressure maintaining of inflation and control over deflation are achieved, the cost is low, the function is stable, and the economic and applicable value is improved.

Description

Technical Field

[0001] The utility model relates to the technology of solenoid valves, in particular to a two-position three-way pneumatic solenoid valve. Background Art

[0002] Solenoid valves are one of the important components in the field of automatic control. Its principle is to drive the movement of the armature through electromagnetic force to realize the opening and closing of the valve port, so as to control and adjust the direction, flow rate, pressure or other parameters of the fluid medium in the circuit. The fluid medium is generally liquid or gas.

[0003] However, the existing solenoid valves can only control the on-off of the air circuit, and cannot separately meet the requirements of inflation and pressure maintenance and deflation control. It is necessary to connect a check valve additionally, which occupies a large space and has a high cost. Summary of the Utility Model

[0004] To solve the defects of the above-mentioned prior art, the utility model provides a two-position three-way pneumatic solenoid valve, which integrates the function of the check valve into this solenoid valve. The structure is simple, integrally combined, saving components and space, and realizing the control of inflation pressure maintenance and deflation.

[0005] To achieve the above technical purpose, the utility model adopts the following technical scheme: A two-position three-way pneumatic solenoid valve includes a skeleton, a coil is wound around the outer wall of the skeleton, a cavity is provided inside the skeleton, an armature is arranged inside the cavity, an air flow channel is arranged between the outer wall of the armature and the inner wall of the cavity, a working port communicating with the air flow channel is arranged on the side wall of the skeleton, a deflation port is arranged at the bottom of the cavity, a static core is arranged at the opening at the top of the cavity, an air inlet is arranged inside the static core, a stepped hole is arranged on the side of the armature facing the static core, a sealing plug and a first spring are arranged inside the stepped hole, the first spring is used to support and seal the air inlet by the sealing plug, and a second spring is arranged between the stepped hole and the static core.

[0006] Preferably, protrusions are arranged on the outer walls of both the air inlet and the working port.

[0007] Preferably, rib strips are arranged on the inner wall of the cavity, and sliding grooves that are slidably matched with the rib strips are arranged on the armature.

[0008] Preferably, the skeleton is provided with a yoke, the yoke is in a C shape, one end of the yoke is inserted into the skeleton, the other end of the yoke abuts against the static core, and the yoke is used to press the static core and the skeleton tightly.

[0009] Preferably, two pins are arranged on the skeleton, and the two pins are respectively connected to both ends of the coil.

[0010] Preferably, a groove is arranged on the side of the armature facing the deflation port, and a sealing gasket is arranged inside the groove.

[0011] Preferably, a sealing ring is arranged between the static core and the inner wall of the inner cavity.

[0012] In summary, the present utility model has achieved the following technical effects:

[0013] The two-position three-way pneumatic solenoid valve of the present utility model integrates the function of a check valve into this solenoid valve. It has a simple structure, an integrated combination, saves components and space, realizes the control of pressure maintenance during inflation and air release, has a low cost, stable functions, and enhances the economic applicability value. Description of the Drawings

[0014] Figure 1 is a schematic three-dimensional structure diagram of the two-position three-way pneumatic solenoid valve of the present utility model;

[0015] Figure 2 is a cross-sectional view of the two-position three-way pneumatic solenoid valve of the present utility model;

[0016] Explanation of the reference numerals in the drawings: 1. Skeleton; 2. Coil; 3. Pin; 4. Sealing gasket; 5. Armature; 6. First spring; 7. Sealing plug; 8. Second spring; 9. Sealing ring; 10. Yoke; 11. Static core; 12. Air inlet; 13. Working port; 14. Air release port. Detailed Embodiment

[0017] The following further details the present utility model with reference to the drawings.

[0018] This specific embodiment is only an explanation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the Patent Law.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model.

[0020] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0021] In the present utility model, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0023] Embodiment 1:

[0024] As Figure 1 As shown in Fig. -2, a two-position three-way pneumatic solenoid valve includes a skeleton 1, around the outer wall of the skeleton 1 is wound a coil 2, a cavity is provided inside the skeleton 1, an armature 5 is provided inside the cavity, an air flow channel is provided between the outer wall of the armature 5 and the inner wall of the cavity, a working port 13 communicating with the air flow channel is provided on the side wall of the skeleton 1, a vent port 14 is provided at the bottom of the cavity, a static core 11 is provided at the opening at the top of the cavity, an air inlet 12 is provided inside the static core 11, a stepped hole is provided on the side of the armature 5 facing the static core 11, a sealing plug 7 and a first spring 6 are provided inside the stepped hole, the first spring 6 is used to push and support the sealing plug 7 to seal the air inlet 12, and a second spring 8 is provided between the stepped hole and the static core 11.

[0025] The two-position three-way pneumatic solenoid valve of this embodiment integrates the one-way valve function into this solenoid valve, has a simple structure, is integrally combined, saves components and space, realizes the control of inflation pressure maintenance and deflation, has a low cost, stable functions, and improves the economic applicability value.

[0026] Among them, the skeleton 1 is a plastic injection molded part, the armature 5 is machined from a magnetic conductive material, and the sealing gasket 4 and the sealing plug 7 are both made of rubber.

[0027] Protrusions are provided on the outer walls of the air inlet 12 and the working port 13; the protrusions can enable the reliable connection of the air inlet 12 or the working port 13 with the air pipe hose.

[0028] Ribs are provided on the inner wall of the cavity, and sliding grooves that are slidably matched with the ribs are provided on the armature 5; the ribs and the sliding grooves can limit the armature 5 to prevent the armature 5 from rotating.

[0029] The skeleton 1 is provided with a yoke 10. The yoke 10 is in a C shape. One end of the yoke 10 is inserted into the skeleton 1, and the other end of the yoke 10 abuts against the static core 11. The yoke 10 is used to press the static core 11 and the skeleton 1 tightly.

[0030] Two pins 3 are provided on the skeleton 1, and the two pins 3 are respectively connected to both ends of the coil 2.

[0031] A groove is provided on one side of the armature 5 facing the air release port 14, and a sealing gasket 4 is provided in the groove.

[0032] A sealing ring 9 is provided between the static core 11 and the inner wall of the inner cavity.

[0033] Working principle: The sealing plug 7 in the stepped hole of the armature 5 seals the air inlet 12 through the spring force of the first spring 6; at the same time, the spring force of the second spring 8 presses the armature 5 towards the air release port 14, and the sealing gasket 4 at one end of the armature 5 blocks the air release port 14; when the air source is turned on and passes through the air inlet 12, the pressure of the air inlet 12 is greater than the spring force of the first spring 6, and the air inlet 12 is opened, so that the air inlet 12 intakes air through the air flow channel to the working port 13; when the air source input at the air inlet 12 stops, the sealing plug 7 seals the air inlet 12 under the spring force of the first spring 6, and the air release port 14 is still sealed by the armature 5 and the sealing gasket 4, so as to maintain pressure on the working port 13; when the solenoid valve is powered on, the coil 2 generates a magnetic field to drive the armature 5 to move towards the static core 11 until it is attracted to the static core 11, and the air release port 14 changes from closed to open, and the gas flows from the working port 13 and the air flow channel to the air release port 14 to realize air release.

[0034] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A two-position three-way pneumatic solenoid valve, characterized in that: It includes a skeleton, a coil is wound around the outer wall of the skeleton, a cavity is provided in the skeleton, an armature is provided in the cavity, an air flow channel is provided on the outer wall of the armature and the inner wall of the cavity, a working port connected to the air flow channel is provided on the side wall of the skeleton, an air discharge port is provided at the bottom of the cavity, a static core is provided at the top opening of the cavity, an air inlet is provided in the static core, a stepped hole is provided on the side of the armature facing the static core, a sealing plug and a first spring are provided in the stepped hole, the first spring is used to support the sealing plug to close the air inlet, and a second spring is provided between the stepped hole and the static core.

2. A two-position three-way pneumatic solenoid valve according to claim 1, characterized in that: The outer walls of the air inlet and the working port are both provided with protrusions.

3. A two-position three-way pneumatic solenoid valve according to claim 1, characterized in that: The inner wall of the cavity is provided with ribs, and the armature is provided with a sliding groove which is slidably matched with the ribs.

4. A two-position three-way pneumatic solenoid valve according to claim 1, characterized in that: The frame is provided with a yoke, which is C-shaped. One end of the yoke is inserted into the frame, and the other end of the yoke is against the static core. The yoke is used to press the static core and the frame.

5. A two-position three-way pneumatic solenoid valve according to claim 1, characterized in that: The frame is provided with two pins, and the two pins are respectively connected to the two ends of the coil.

6. A two-position three-way pneumatic solenoid valve according to claim 1, characterized in that: A groove is arranged on the side of the armature facing the air leakage port, and a sealing rubber pad is arranged in the groove.

7. A two-position three-way pneumatic solenoid valve according to claim 1, characterized in that: A sealing ring is arranged between the static core and the inner wall of the inner cavity.

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