CN210637574U - Electromagnetic valve - Google Patents

Abstract

The utility model provides a novel solenoid valve, it includes: the valve body defines an inner cavity, and the inner cavity comprises a working cavity, a first air outlet channel and a second air outlet channel which are communicated with each other; the static iron core comprises an air inlet air passage, wherein the static iron core is at least partially accommodated in the working cavity 11 and is fixedly connected with the body; and the movable iron core is positioned in the working cavity, is separated from the static iron core through a pressure spring and can move to abut against the static iron core under the action of electromagnetic force when the electromagnetic valve is electrified. The electromagnetic valve in the technical scheme can effectively reduce sound and vibration generated in the working process under the condition of ensuring sealing.

Description

Electromagnetic valve

Technical Field

The utility model relates to a solenoid valve, especially be applicable to the pneumatic means's such as products such as car, furniture solenoid valve.

Background

Pneumatic products typically require the use of solenoid valves to control the connection or disconnection or even change of the gas flow path. The solenoid valve includes the valve body, arranges movable iron core and quiet iron core and around moving iron core and the coil of quiet iron core arrangement on the valve body in the valve body. When the coil is electrified, the movable iron core moves relative to the valve body under the action of magnetic force, so that the gas flow path is opened or disconnected or even changed.

In the prior art, when the movable iron core moves towards the static iron core, metal surfaces of the movable iron core and the static iron core can mutually impact to generate noise and vibration. To this end, various damping or noise reduction structures are used in the solenoid valve to dampen the noise and vibration.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel solenoid valve, it includes:

the valve body defines an inner cavity, and the inner cavity comprises a working cavity, a first air outlet channel and a second air outlet channel which are communicated with each other;

the static iron core comprises an air inlet air passage, wherein the static iron core is at least partially accommodated in the working cavity 11 and is fixedly connected with the body; and

the movable iron core is positioned in the working cavity, is separated from the static iron core through a pressure spring and can move to be abutted against the static iron core under the action of electromagnetic force when the electromagnetic valve is electrified, wherein a gap is formed between the outer surface of the movable iron core and the inner surface of the working cavity and is suitable for communicating the air inlet channel with the first air outlet channel;

the movable iron core is provided with a mounting hole at one end, the mounting hole is suitable for fixedly mounting the elastic block, and the mounted elastic block comprises a boss which is exposed out of the mounting hole and extends in the radial direction;

the end face of the static iron core, which faces the movable iron core, is a flat surface; and is

When the electromagnetic valve is electrified, the movable iron core can move towards the static iron core by overcoming the acting force of the pressure spring until the sealing surface of the elastic block compresses the end surface of the static iron core and forms a seal between the static iron core and the static iron core, so that the gas communication between the gas inlet air passage and the gap is disconnected.

The sound and the vibration that produce when the striking can effectively be reduced to movable iron core and quiet iron core under the sealed condition of assurance in this scheme. Specifically, the stationary core employs a flat sealing surface without a boss to increase a contact area. Meanwhile, the elastic block has a larger sealing contact surface so as to improve the sealing effect. The movable iron core adopts a structure that the counter bore is added with the elastic block, so that the movable iron core is prevented from being in direct contact with the static iron core, and the generation of violent impact sound and vibration is effectively avoided while good sealing is realized.

Advantageously, the other end of the plunger is also provided with a mounting hole adapted to fixedly mount the resilient block.

Advantageously, the resilient block is provided with a collar, and the mounting hole is provided with an annular groove therein, the annular groove being adapted to receive the collar to retain the resilient block within the mounting hole.

Advantageously, the resilient block is provided with at least one axially extending groove in its outer peripheral surface, the groove extending from the inner side surface to the outside of the collar.

Advantageously, the working chamber extends in the axial direction of the valve body, and the first outlet passage and the second outlet passage project from one end of the valve body in two different radial directions.

Advantageously, when the solenoid valve is energized, the moving core moves to communicate the first outlet channel and the second outlet channel with each other.

Advantageously, the plunger is positioned such that gas entering from the inlet gas duct flows out of the first outlet gas duct via the gap when the solenoid valve is de-energized.

Advantageously, the solenoid valve further comprises a fixing bracket for fixing the stationary core to the valve body.

Advantageously, the outward end of the stationary core is provided with a radial flange which abuts against an end face of the valve body under the action of the fixing frame.

Advantageously, a protruding nozzle extends axially from an outward end surface of the stationary core, and the protruding nozzle is configured to be engaged with a slot at one end of the fixing frame.

Drawings

Further details and advantages of the invention will be described in further detail below with reference to the accompanying drawings, in which:

fig. 1 shows a cross-sectional view of a particular solenoid valve according to the present invention, comprising a valve body 10, a movable iron core 20 and a stationary iron core 30 arranged in the valve body;

FIG. 2 is an exploded view of the solenoid valve of FIG. 1;

FIG. 3 is a cross-sectional view of the stationary core of FIG. 1;

FIG. 4 is a cross-sectional view of the plunger of FIG. 1;

FIG. 5 is a cross-sectional view of the body of the plunger of FIG. 4;

FIG. 6 is a perspective view of the elastic block of the plunger of FIG. 4;

fig. 7 is a schematic diagram showing the fitting of the movable core and the stationary core.

The drawings described above are for illustration and example only and are not to be taken as a strict proportion or scale, nor are all of the components or details thereof shown in a particular use environment. Those skilled in the art will appreciate that the conception and specific use of the invention may be readily utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention.

Detailed Description

The terms "first," "second," and the like, as may be used in the following description, are not intended to limit any order, but merely to distinguish one element, part, structure, component, etc., from another element, and the individual elements, parts, structures, components, etc., may be the same, similar, or different. Meanwhile, descriptions about orientations, such as "upper", "lower", "inner", "outer", "left", "right", "radial", "axial", and the like, which may be used in the following description, are only for convenience of description unless explicitly stated, and are not intended to form any limitation on the technical solution of the present invention.

Fig. 1 and 2 show a particular solenoid valve according to the invention. As can be seen, the solenoid valve includes a generally cylindrical valve body 10 defining an axially extending interior chamber. The inner cavity comprises a working cavity 11, a first air outlet channel 12 and a second air outlet channel 13 which are mutually communicated, wherein the working cavity 11 extends along the axial direction of the body, and the first air outlet channel 12 and the second air outlet channel 13 respectively extend out along two different radial directions at one end part of the valve body 10.

The working chamber 11 of the valve body is provided with a movable iron core 20 and a static iron core 30, and the periphery of the valve body is wound with a coil 14. The stationary core 30 has an axially extending air intake duct 31, a substantially cylindrical outer periphery, a flange 34 at one end, and a nipple 33 axially extending from an end surface of the end. The stationary core 30 is fixed to the valve body by a fixing frame 15. The holder 15 is substantially C-shaped, and has one end connected to a projection extending from the surface of the valve body and the other end provided with a locking groove 16 for locking the nipple 33. Thus, the flange 34 on the end of the stationary core abuts against the end face of the valve body 10 by the fixing frame 15.

The movable iron core 20 is located in the working chamber 11 and separated from the stationary iron core 30 by a compression spring 40. Specifically, the air intake duct 31 of the stationary core accommodates the compression spring 40, one end of the compression spring 40 is compressed to the boss provided inside the air intake duct 31, and the other end is compressed to the end face of the movable core 20, so that the movable core 20 and the stationary core 30 are separated from each other by the action of the compression spring 40. The outer surface of the plunger 20 and the inner surface of the working chamber form a gap 24, and the gap 24 is suitable for communicating the air inlet duct 31 with the first air outlet channel 12. The gap 24 can be formed, for example, by setting the entire or a part of the outer diameter of the plunger to be smaller than the inner diameter of the working chamber 11.

When the coil 14 of the solenoid valve is not energized, as shown in fig. 1, the movable iron core 20 abuts against the valve seat in the inner cavity of the valve body under the action of the pressure spring 40, so that the left end face of the movable iron core 20 seals the second air outlet channel 13, and simultaneously, the right end face of the movable iron core 20 is separated from the left end face of the stationary iron core 30, and then the gas entering from the air inlet channel 31 can enter the gap 24 and finally flows out from the first air outlet channel 12.

When the coil 14 of the solenoid valve is energized, the magnetic field generated by the solenoid valve magnetizes and attracts the movable iron core 20 and the stationary iron core 30. Thus, the movable iron core 20 moves toward the stationary iron core 30 against the urging force of the compression spring 40 until the sealing surface of the elastic block 25 presses the end surface 32 of the stationary iron core and forms a seal therebetween, preventing the gas from entering from the gas inlet passage 31. Meanwhile, the movable iron core 20 also opens the second gas outlet channel 13 after moving towards the stationary iron core 30, so that the second gas outlet channel 13 is communicated with the first gas outlet channel 12, and thus gas possibly existing in the first gas outlet channel 12 can flow out through the second gas outlet channel.

Fig. 3 shows a cross-sectional view of the stationary core in fig. 1. The end face 32 of the stationary core facing the moving core is a flat surface. In contrast, this end face of the stationary core of the prior art is typically provided with an axial flange which presses into an elastomeric block on the end face of the moving core to form a seal. Because the flange area is very small, after the flange area is pressed into the elastic block, the metal surfaces of the static iron core and the movable iron core mutually impact, and therefore noise and vibration are generated. The end face 32 of the stationary core 30 of the present application is not provided with an axial flange, but is provided with a flat surface, which can effectively prevent impact and noise while forming a seal.

Fig. 4 shows a cross-sectional view of the plunger 20 of fig. 1. The plunger includes a body 21 (see fig. 5) and an elastic block 25 (see fig. 6). Both ends of the body 21 are provided with mounting holes 22 to which elastic blocks 25 can be fixedly mounted. The elastic block 25 includes a boss 27 exposed to the outside of the mounting hole 22. The elastic block 25 is provided with a protruding ring 26, and correspondingly, an annular groove 23 is provided in the mounting hole 22 of the plunger, and the annular groove 23 is suitable for accommodating the protruding ring 26 to keep the elastic block 25 in the mounting hole 22. The outer peripheral surface of the resilient block 25 is provided with an axially extending groove 28 which extends from the inner side surface 29 of the body at least beyond the collar 26. The elastic block 25 may have only one groove 28, or may have a plurality of grooves, for example, three grooves 28 are shown in the figure. In addition, the elastic block may be provided only on the right side of the body 21, or may be provided on both ends of the body as shown in the drawing.

Fig. 7 is a schematic diagram of the movable core 20 and the stationary core 30. When the coil 14 of the electromagnetic valve is electrified, the movable iron core 20 moves towards the static iron core until the sealing surface of the elastic block 25 is pressed against the end surface of the static iron core. Because the terminal surface of quiet iron core is the plane, the boss 27 of elastic block separates the terminal surface of moving iron core and the terminal surface of quiet iron core all the time, effectively prevents both clashes into each other to can prevent the production of noise. After the coil 14 of the solenoid valve stops supplying power, the movable iron core is no longer under the action of magnetic force, and is pressed towards the valve seat at the left end of the working chamber 11 under the action of the compression spring 40. At this time, the elastic block at the left end of the movable iron core prevents the movable iron core from directly impacting the valve seat and provides vibration damping.

It can be understood that the movable iron core and the static iron core in the technical scheme can effectively reduce sound and vibration generated in the impact process under the condition of ensuring sealing. Specifically, the static iron core adopts a plane sealing surface without a boss, so that the contact area can be increased. Meanwhile, the elastic block has a larger sealing contact surface, so that the sealing effect can be effectively improved. The movable iron core adopts a counter bore plus elastic block structure, so that the movable iron core is prevented from being in direct contact with the static iron core, and the generation of violent impact sound and vibration is effectively avoided while good sealing is realized. In addition, the elastic block is provided with a pressure equalizing groove, so that compressed gas generated in the mounting hole of the movable iron core during assembly of the elastic block can be effectively discharged, and rapid assembly is facilitated.

The foregoing description is only exemplary of the principles and spirit of the invention. It will be appreciated by those skilled in the art that changes may be made in the described examples without departing from the principles and spirit thereof, and that such changes are contemplated by the inventors and are within the scope of the invention as defined in the appended claims.

Claims (10)

1. A solenoid valve, comprising:

a valve body (10) defining an inner cavity comprising a working cavity (11), a first outlet channel (12) and a second outlet channel (13) which are mutually communicated;

the static iron core (30) comprises an air inlet air passage (31), wherein the static iron core (30) is at least partially accommodated in the working cavity (11) and is fixedly connected relative to the valve body (10); and

the movable iron core (20) is positioned in the working cavity (11), is separated from the static iron core (30) through a pressure spring (40), and can move to abut against the static iron core (30) under the action of electromagnetic force when the electromagnetic valve is electrified, wherein a gap (24) is formed between the outer surface of the movable iron core (20) and the inner surface of the working cavity, and the gap (24) is suitable for communicating the air inlet air channel (31) to the first air outlet channel (12);

wherein, one end of the movable iron core (20) is provided with a mounting hole (22), the mounting hole is suitable for fixedly mounting an elastic block (25), and the mounted elastic block (25) comprises a boss (27) which is exposed out of the mounting hole (22) and extends in the radial direction;

wherein, the end surface (32) of the static iron core (30) facing the movable iron core (20) is a flat surface; and is

When the electromagnetic valve is electrified, the movable iron core (20) can move towards the static iron core (30) against the acting force of the compression spring (40) until the sealing surface of the elastic block (25) presses the end surface (32) of the static iron core to form a seal between the end surface and the static iron core, so that the gas communication between the air inlet air channel (31) and the gap (24) is cut off.

2. The solenoid valve according to claim 1, wherein:

the other end part of the movable iron core (20) is also provided with a mounting hole (22) suitable for fixedly mounting an elastic block (25).

3. The solenoid valve according to claim 1, wherein:

a protruding ring (26) is arranged on the outer peripheral surface of the elastic block (25), an annular groove (23) is arranged in the mounting hole (22), and the annular groove (23) is suitable for accommodating the protruding ring (26) so as to keep the elastic block (25) in the mounting hole (22).

4. The solenoid valve according to claim 3, wherein:

the outer circumference of the elastic block (25) is provided with at least one axially extending groove (28) extending from the inner side (29) to the outside of the protruding ring (26).

5. The solenoid valve according to claim 1, wherein:

the working cavity (11) extends along the axial direction of the valve body (10), and the first air outlet channel (12) and the second air outlet channel (13) extend out of one end of the valve body (10) along two different radial directions.

6. The solenoid valve according to claim 1, wherein:

when the electromagnetic valve is electrified, the movable iron core (20) moves to enable the first air outlet channel (12) and the second air outlet channel (13) to be communicated with each other.

7. The solenoid valve according to claim 1, wherein:

when the electromagnetic valve is not electrified, the movable iron core (20) is positioned to enable gas entering from the air inlet channel (31) to flow out of the first air outlet channel (12) through the gap (24).

8. The solenoid valve according to claim 1, wherein:

a fixing frame (15) for fixing the static iron core (30) to the valve body (10) is further included.

9. The solenoid valve as set forth in claim 8, wherein:

the end part of the static iron core (30) positioned outside the valve body (10) is provided with a radial flange (34), and the radial flange is abutted against the end face of the valve body (10) under the action of the fixed frame (15).

10. The solenoid valve as set forth in claim 9, wherein:

a protruding nozzle (33) extends out of the end face, located outside the valve body (10), of the static iron core (30) along the axial direction, and the protruding nozzle is clamped by a clamping groove (16) on one end portion of the fixing frame (15).

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