CN107289172B

CN107289172B - Electromagnetic valve

Info

Publication number: CN107289172B
Application number: CN201610191101.0A
Authority: CN
Inventors: 金钜; 黄鸿峰; 江超
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2016-03-30
Filing date: 2016-03-30
Publication date: 2020-09-22
Anticipated expiration: 2036-03-30
Also published as: CN107289172A

Abstract

The invention provides an electromagnetic valve which comprises a valve body, wherein the valve body is provided with a valve port, an inlet and an outlet which are communicated through the valve port, a main valve core with a damping port is arranged at the valve port in a sliding mode, a guide pipe is fixedly arranged on the valve body, an attractor is fixedly arranged at the upper part of the guide pipe, a core iron and a core iron cap fixedly connected with the core iron are arranged in the guide pipe in a sliding mode, an elastic mechanism is arranged between the attractor and the core iron, a one-way valve core is arranged in the core iron cap in a sliding mode corresponding to the damping port, a pressure relief channel is arranged on the side wall of the core iron cap, and the one-way valve core is provided with a first position located between the pressure. According to the electromagnetic valve, the problem that in the prior art, reverse air inlet of the electromagnetic valve generates vibration to cause noise can be solved.

Description

Electromagnetic valve

Technical Field

The invention relates to the technical field of hydraulic valves, in particular to an electromagnetic valve applied to refrigeration systems of air conditioners, freezers, refrigerators and the like.

Background

The electromagnetic valve is used as an automatic control element, and the clutch of the valve body relative to the valve seat is realized mainly through magnetic force generated by the electromagnetic coil, so that the opening/closing purpose of the valve body is achieved.

The air inlet pipe and the air outlet pipe of the existing electromagnetic valve are both specific, when air is reversely fed, the valve core is subjected to upward impulsive force of the air and downward elastic force of the spring, when the elastic force is approximately the same as the reverse air feeding impulsive force, resonance is easily generated at the moment, and vibration is generated to cause noise.

Disclosure of Invention

The invention aims to provide an electromagnetic valve to solve the problem that in the prior art, reverse air inlet of the electromagnetic valve generates vibration to cause noise.

In order to solve the technical problems, as an aspect of the present invention, a solenoid valve is provided, which includes a valve body, the valve body has a valve port, an inlet and an outlet, the inlet and the outlet are communicated through the valve port, a main valve core with a damping port is slidably disposed at the valve port, a guide tube is fixedly disposed on the valve body, an attractor is fixedly disposed at an upper portion of the guide tube, a core iron and a core iron cap fixedly connected to the core iron are slidably disposed inside the guide tube, an elastic mechanism is disposed between the attractor and the core iron, a check valve core is slidably disposed in the core iron cap corresponding to the damping port, a pressure relief channel is disposed on a sidewall of the core iron cap, and the check valve core has a first position located between the pressure relief channel and the valve port and a second.

According to the electromagnetic valve, when fluid flows reversely and the pressure is low, the main valve core cannot be opened, the reverse pressure generated by the fluid pushes the one-way valve core to the second position, the outlet and the inlet are communicated through the damping port and the pressure relief channel, the reverse pressure generated by the fluid entering reversely from the outlet is relieved through the pressure relief channel after the one-way valve core is pushed open, the gravity and the elastic force borne by the main valve core are balanced with the force generated by the reverse pressure, the main valve core is kept still, the one-way valve core is kept still, noise caused by shaking of parts in the valve body can be effectively prevented, and the working performance of the electromagnetic valve is improved.

Drawings

FIG. 1 schematically shows a cross-sectional structural view of a solenoid valve according to an embodiment of the invention;

FIG. 2 schematically shows an enlarged structural view at Q of the solenoid valve according to FIG. 1;

FIG. 3 schematically shows a core construction diagram of the solenoid valve according to FIG. 1;

fig. 4 schematically shows a structure view of a solenoid valve in reverse air intake according to an embodiment of the present invention.

Reference numbers in the figures: 1. a valve body; 2. a damping port; 3. an inlet; 4. an outlet; 5. a conduit; 6. an attractor; 7. a core iron; 8. a core iron cap; 9. a one-way valve core; 10. a pressure relief channel; 11. a stepped hole; 12. mounting grooves; 13. a spring; 14. a main valve element; 15. and (4) valve ports.

Detailed Description

The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.

The direction of the arrows in the figure indicates the direction of flow of the fluid.

Referring to fig. 1 to 4, according to an embodiment of the present invention, the electromagnetic valve includes a valve body 1, the valve body 1 has a valve port 15, and an inlet 3 and an outlet 4 communicated through the valve port 15, a main valve core 14 having a damping port 2 is slidably disposed at the valve port 15, a conduit 5 is fixedly disposed on the valve body 1, an attractor 6 is fixedly disposed on an upper portion of the conduit 5, a core iron 7 and a core iron cap 8 fixedly connected to the core iron 7 are slidably disposed inside the conduit 5, an elastic mechanism is disposed between the attractor 6 and the core iron 7, a check valve core 9 is slidably disposed in the core iron cap 8 corresponding to the damping port 2, a pressure relief channel 10 is disposed on a sidewall of the core iron cap 8, and the check valve core 9 has a first position located between the pressure relief channel 10 and the valve port 15 and a second position located on a side of the pressure relief.

When the electromagnetic valve works, when the electromagnetic coil is electrified, the attractor 6 applies magnetic attraction to the core iron 7, the core iron 7 drives the core iron cap 8 to move towards the attractor 6, at the moment, if fluid normally flows, the fluid pressure overcomes the gravity of the main valve core 14, so that the main valve core 14 is opened upwards, the inlet 3 is communicated with the outlet 4 through the valve port 15, and the fluid normally flows; if the fluid flows reversely, when the pressure of the reverse flow inlet is lower, the reverse pressure generated by the reverse fluid only jacks the one-way valve core 9, at the moment, the gravity borne by the main valve core 14 and the force generated by the reverse pressure are balanced mutually, the main valve core 14 cannot be opened, the one-way valve core 9 is located at the second position under the action of the fluid, the inlet 3 is communicated with the pressure relief channel 10 and the outlet 4 through the damping port 2 on the main valve core 14, the reverse fluid is relieved through the pressure relief channel, the main valve core 14 is kept still, the one-way valve core 9 is kept at the second position, all parts in the valve body 1 are in a balanced state, and the vibration cannot occur, and the vibration noise is.

Along with the increase of the reverse pressure, when the reverse pressure reaches the preset pressure, the reverse pressure overcomes the gravity action of the main valve core 14, so that the main valve core 14 moves towards the direction of the attractor 6, the valve port 15 is opened, the check valve core 9 is still at the second position and keeps a balanced state at the moment, the system pressure reaches balance, and no shaking noise is generated, therefore, through the matching of the check valve core 9 and the pressure relief channel 10, when the electromagnetic valve generates reverse fluid circulation, the shaking of internal parts can be effectively avoided, and the working performance of the electromagnetic valve is improved. Meanwhile, the electromagnetic valve also has the advantages of simple structure, burning of parts, simple assembly and lower cost.

Preferably, the one-way valve spool 9 has a conical head projecting toward the damping port 2 and sealingly engaging the damping port 2. The conical head of the one-way valve core 9 can play a role in guiding when being matched with the damping port 2, and meanwhile, the sealing matching effect between the one-way valve core 9 and the main valve core 14 can be effectively enhanced, and the sealing performance of the electromagnetic valve is improved.

A stepped hole 11 is formed in the core cap 8, and the one-way valve core 9 slides in a sliding space defined by the stepped surface of the stepped hole 11 and the core 7. The one-way valve core 9 is axially limited through the matching of the stepped hole 11 of the core iron cap 8 and the core iron 7, so that the sliding position of the one-way valve core 9 can be conveniently limited, and the processing difficulty of the core iron cap 8 can be reduced.

Preferably, when the check valve core 9 is in sealing fit with the damping port 2, a gap A is formed between the check valve core 9 and the step surface. When the electromagnetic coil is not electrified, under the elastic action of the elastic mechanism and the gravity action of the one-way valve core 9, the core iron cap 8 is abutted on the end face of the main valve core 14, the one-way valve core 9 is sealed on the damping port 2 of the main valve core 14, when fluid flows reversely, the fluid enters the position of the one-way valve core 9 from the damping port 2, then the one-way valve core 9 is pushed to open the damping port 2, and because a gap is formed between the one-way valve core 9 and a step surface, the reverse fluid can enter the gap more conveniently, thrust for enabling the one-way valve core 9 to open the damping port 2 is rapidly generated, the one-way valve core 9 can be controlled to open the damping port 2 more rapidly, and the development performance of the electromagnetic.

Preferably, the flow area of the pressure relief channel 10 is larger than that of the damping port 2, so that the fluid flowing out of the damping port 2 can be quickly relieved from the pressure relief channel 10, the shaking of parts caused by overlarge pressure at the inlet 3 and the outlet 4 of the electromagnetic valve can be better avoided, and the shaking noise in the working process of the electromagnetic valve can be effectively reduced or avoided. In this embodiment, the pressure relief passage 10 is a plurality of circular holes uniformly arranged along the circumferential direction of the core nut 8.

The core iron cap 8 and the core iron 7 are arranged separately and fixedly connected. The core iron cap 8 and the core iron 7 are arranged in a split mode, the core iron cap 8 and the core iron 7 can be processed respectively, the work adding difficulty of each component is reduced, and the processing cost is reduced. After finishing the processing of the core iron cap 8 and the core iron 7, the unidirectional valve core 9 can be installed in the stepped hole 11 of the core iron cap 8, and then the two are fixedly connected together in a screwing mode and the like, so that the installation is more convenient and faster. Of course, the core cap 8 and the core 7 may also be welded together after assembly is completed.

An installation groove 12 is formed in one end, facing the attractor 6, of the core iron 7, the elastic mechanism comprises a spring 13, the spring 13 is arranged in the installation groove 12, one end of the spring 13 abuts against the attractor 6, and the other end of the spring 13 abuts against the core iron 7.

The side of the non-return valve core 9 facing the core iron 7 is provided with a damping device, for example, an annular plastic gasket is placed between the non-return valve 9 and the core iron 7 as a damping device. The damping device can reduce the impact on the core iron 7 in the movement process of the one-way valve core 9 when the reverse fluid impacts the one-way valve core 9, reduce the vibration effect of the electromagnetic valve and further improve the damping and noise-proof performance of the electromagnetic valve.

When the check valve element 9 is in the open state, the element cap 8 abuts on the main valve element 14. Under the elastic action of the spring 13, the core iron cap 8 is tightly abutted against the main valve core 14, so that the main valve core 14 can be more effectively pressed on the valve body 1 through the elastic action of the spring 13, the phenomenon that the main valve core is shaken under the impact action of reverse fluid to generate noise is avoided, and the noise prevention performance of the electromagnetic valve is further improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic valve is characterized by comprising a valve body (1), wherein the valve body (1) is provided with a valve port (15) and an inlet (3) and an outlet (4) which are communicated through the valve port (15), a main valve core (14) with a damping port (2) is arranged at the valve port (15) in a sliding manner, a guide pipe (5) is fixedly arranged on the valve body (1), an attractor (6) is fixedly arranged at the upper part of the guide pipe (5), a core iron (7) and a core iron cap (8) fixedly connected with the core iron (7) are arranged in the guide pipe (5) in a sliding manner, an elastic mechanism is arranged between the attractor (6) and the core iron (7), a one-way valve core (9) is arranged in the core iron cap (8) in a sliding manner corresponding to the damping port (2), a pressure relief channel (10) is arranged on the side wall of the core iron cap (8), and the one-way valve core (9) is provided with a first valve port (15) between the pressure relief channel ( A second position located on the side of the pressure relief channel (10) far away from the valve port (15);

when fluid flows in the positive direction, the fluid pressure overcomes the gravity of the main valve core (14), so that the main valve core (14) is opened upwards, and the inlet (3) and the outlet (4) are communicated through the valve port (15);

when the fluid flows reversely and the reverse pressure generated by the reverse fluid only jacks up the one-way valve core (9), the one-way valve core (9) is located at the second position under the action of the fluid, and the inlet (3) is communicated with the pressure relief channel (10) and the outlet (4) through the damping port (2) on the main valve core (14).

2. The solenoid valve according to claim 1, characterized in that said one-way spool (9) has a conical head projecting towards said orifice (2) and in sealing engagement with said orifice (2).

3. The electromagnetic valve according to claim 1, characterized in that a stepped hole (11) is provided in the core cap (8), and the one-way valve core (9) slides in a sliding space defined by a stepped surface of the stepped hole (11) and the core (7).

4. A solenoid valve according to claim 3, characterised in that when the one-way spool (9) is in sealing engagement with the damping port (2), there is a clearance between the one-way spool (9) and the step surface.

5. A solenoid valve according to claim 1, characterised in that the flow area of the pressure relief channel (10) is greater than the flow area of the damping port (2).

6. The solenoid valve according to claim 1, characterized in that the core cap (8) and the core (7) are provided separately and fixedly connected.

7. The electromagnetic valve according to claim 1, characterized in that the core iron (7) is provided with a mounting groove (12) at one end facing the attractor (6), the elastic means comprise a spring (13), the spring (13) is arranged in the mounting groove (12), one end of the spring (13) abuts on the attractor (6) and the other end abuts on the core iron (7).

8. A solenoid valve according to claim 1, characterised in that the side of the non-return spool (9) facing the core iron (7) is provided with damping means.

9. A solenoid valve according to claim 1, characterised in that the spool cap (8) abuts on the main spool (14) when the one-way spool (9) is in the open state.