CN212839525U

CN212839525U - Miniature electromagnetic valve

Info

Publication number: CN212839525U
Application number: CN202021290055.8U
Authority: CN
Inventors: 陈家炎
Original assignee: Ningbo Tatex Mechtronics Co ltd
Current assignee: Ningbo Tatex Mechtronics Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-03-30
Anticipated expiration: 2030-07-02

Abstract

The utility model relates to a miniature electromagnetic valve, which comprises a valve seat and a valve body arranged on the valve seat; the valve seat is provided with a valve cavity, a medium inlet and a medium outlet, and the valve cavity is respectively communicated with the medium inlet and the medium outlet; the valve body is provided with a cavity, an electromagnetic assembly is arranged in the cavity and comprises a movable iron core capable of moving in the cavity, a sealing ring is arranged between the valve seat and the valve body, and a plug is sleeved at the front end of the movable iron core; the method is characterized in that: the plug is connected with the sealing ring through a diaphragm, and the sealing ring is matched with the plug and the diaphragm to hermetically isolate the cavity from the valve cavity. The utility model discloses well valve body and the sealed isolated external medium of avoiding of disk seat contact with electromagnetic component, have improved miniature solenoid valve's life.

Description

Miniature electromagnetic valve

Technical Field

The utility model relates to a solenoid valve, concretely relates to miniature solenoid valve.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. The electromagnetic valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. The miniature electromagnetic valve is generally a miniature valve, and is widely applied to the industries such as household appliance industry, office equipment, automobile industry, analytical instruments, medical instruments, mechanical manufacturing and the like. Current miniature solenoid valve includes valve body and disk seat, be provided with electromagnetic component in the valve body, electromagnetic component includes the coil, coil skeleton, fixed iron core, expanding spring, the activity iron core, set up the access & exit that supplies the medium business turn over on the valve body, in order to be sealed between valve body and the disk seat, be provided with the sealing washer between the two, in order to avoid the tip and the external medium contact of activity iron core, the tip cover at the activity iron core is equipped with the end cap, but this design is applicable to and uses the air as fluidic operational environment, be two independent parts because of sealing washer and end cap, the isolated effect of valve body and disk seat is poor, when the fluid trades liquid or corrosive liquids, the solenoid valve can only work for the short time, later can be because.

For example, a Chinese utility model patent with patent number ZL201220163406.8 (publication number CN202629268U) entitledminiature normally open water-discharging solenoid valve comprises a valve body, a valve port sealing element, a supporting frame, a movable iron core and a coil, wherein a sealing ring is arranged in a cavity of the valve body, a valve cover is arranged on the sealing ring, and the valve cover is fixed on the valve body through a valve port pressing plate; a movable iron core is arranged in the valve cover, a rod part of the movable iron core is sleeved with a spring, a valve port sealing element is arranged at the lower end of the movable iron core, and a water inlet and a water outlet which are controlled and communicated by the valve port sealing element are arranged in the valve body; the valve cover is sleeved with a coil, the coil is externally provided with a housing, a support frame is arranged between the valve cover and the sealing ring, the support frame is arched, the upper end of the support frame is provided with a central hole which is sleeved on the rod part of the movable iron core, one end of the spring is abutted against the movable iron core, and the other end of the spring is abutted against the support frame. In this scheme, sealing washer and valve port sealing member are two independent parts, and the valve gap is poor with the isolated effect in valve body chamber, has the risk that water flows into in the valve gap, and life is low.

Therefore, further improvements are needed with respect to existing solenoid valves.

Disclosure of Invention

The utility model aims to solve the technical problem that thereby provide one kind with valve body and the sealed isolated miniature solenoid valve who avoids external medium and electromagnetic component contact of disk seat to above-mentioned prior art current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a miniature electromagnetic valve comprises a valve seat and a valve body arranged on the valve seat;

the valve seat is provided with a valve cavity, a medium inlet and a medium outlet, and the valve cavity is respectively communicated with the medium inlet and the medium outlet;

the valve body is provided with a cavity, an electromagnetic assembly is arranged in the cavity and comprises a movable iron core capable of moving in the cavity, a sealing ring is arranged between the valve seat and the valve body, and a plug is sleeved at the front end of the movable iron core;

the method is characterized in that: the plug is connected with the sealing ring through a diaphragm, and the sealing ring is matched with the plug and the diaphragm to seal and isolate the cavity from the valve cavity; when the electromagnetic valve is in an opening state, the movable iron core moves towards the cavity to open the medium outlet, and at the moment, the medium inlet is communicated with the medium outlet; and under the locking state of the electromagnetic valve, the movable iron core moves towards the valve cavity to block the medium outlet, and at the moment, the medium inlet is not communicated with the medium outlet.

The movable iron core and the plug are fixed in various modes, preferably, the front end of the movable iron core extends forwards to form a boss, the bottom of the plug extends towards the cavity to form a step groove, and the movable iron core and the plug are fixed through the cooperation of the boss and the step groove.

Preferably, the thickness of the diaphragm ranges from 0.2mm to 0.3 mm. The activity iron core can stretch and contract at removal in-process diaphragm, and when the thickness of diaphragm was less than 0.2mm, the life of diaphragm reduced, when the thickness of diaphragm was greater than 0.3mm, can cause a large amount of resistances to the activity iron core, need adopt bigger power, caused the waste of electric quantity.

Preferably, the sealing ring, the plug and the diaphragm are integrally formed parts made of silica gel or rubber. The diaphragm made of silica gel or rubber has good elasticity, excellent expansion and contraction performance and long service life; with sealing washer, end cap and diaphragm integrated into one piece, reduction in production cost improves the packaging efficiency. According to different application environments, different materials can be selected as elastic elements, and the silica gel is characterized by being healthy and environment-friendly, meeting the food-grade requirement and being applicable to household electrical appliances; different types of rubber can be selected under the environment of high temperature resistance, oil resistance, acid and alkali resistance and the like.

Preferably, the side wall of the cavity extends downwards to form a convex ring inserted into the valve cavity, and the sealing ring is located between the convex ring and the valve seat. The design of bulge loop is favorable to fixing the valve body on the disk seat, thereby sets up the sealing washer and seals up disk seat and valve body between bulge loop and disk seat.

In order to improve the sealing effect, preferably, an annular groove is formed in the inner side wall of the valve cavity, and the sealing ring is located in the annular groove. The design of the annular groove enables the valve seat to tightly press the sealing ring and the convex ring, and the sealing effect is improved.

Compared with the prior art, the utility model has the advantages of: the plug is connected with the sealing ring through the diaphragm, so that the cavity and the valve cavity are isolated while being sealed, the contact between an external medium and the electromagnetic assembly is avoided, and the service life of the whole electromagnetic valve is prolonged; the electromagnetic valve is suitable for working environments with air as a medium and water, corrosive gas, liquid and the like as media, and has wide application range and strong practicability.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the present invention;

FIG. 4 is an integrated part of the seal ring, the plug and the diaphragm according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of the valve body in the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, the micro solenoid valve of the present invention includes a valve seat 1 and a valve body 2 disposed on the valve seat 1.

The valve seat 1 is provided with a valve cavity 11, a medium inlet 3 and a medium outlet 4, and the valve cavity 11 is respectively communicated with the medium inlet 3 and the medium outlet 4.

The valve body 2 has a cavity 21, and an electromagnetic assembly is arranged in the cavity 21 and comprises a movable iron core 5 capable of moving in the cavity 21.

A sealing ring 6 is arranged between the valve seat 1 and the valve body 2, a plug 7 is sleeved at the front end of the movable iron core 5, the plug 7 is connected with the sealing ring 6 through a diaphragm 8, and the sealing ring 6 is matched with the plug 7 and the diaphragm 8 to hermetically isolate the cavity 21 from the valve cavity 11. In this embodiment, the sealing ring 6, the plug 7 and the diaphragm 8 are integrally formed members made of silica gel.

The thickness range of the diaphragm 8 is 0.2-0.3 mm.

The front end of the movable iron core 5 extends forwards to form a boss 51, the bottom of the plug 7 extends into the cavity 21 to form a step groove 71, and the boss 51 is matched with the step groove 71 to fix the movable iron core 5 and the plug 7.

The side wall of the cavity 21 extends downwards to form a convex ring 22 inserted into the valve cavity 11, the sealing ring 6 is positioned between the convex ring 12 and the valve seat 1, the inner side wall of the valve cavity 11 is provided with an annular groove 12, and the sealing ring 6 is positioned in the annular groove 12.

The working principle is as follows: when the electromagnetic valve is opened, the movable iron core 5 moves towards the cavity 21 to open the medium outlet 4, and at the moment, the medium inlet 3 is communicated with the medium outlet 4; when the electromagnetic valve is locked, the movable iron core 5 moves towards the valve cavity 11 to block the medium outlet 4, and at the moment, the medium inlet 3 is not communicated with the medium outlet 4.

Claims

1. A micro electromagnetic valve comprises a valve seat (1) and a valve body (2) arranged on the valve seat (1);

the valve seat (1) is provided with a valve cavity (11), a medium inlet (3) and a medium outlet (4), and the valve cavity (11) is respectively communicated with the medium inlet (3) and the medium outlet (4);

the valve body (2) is provided with a cavity (21), an electromagnetic assembly is arranged in the cavity (21), the electromagnetic assembly comprises a movable iron core (5) capable of moving in the cavity (21), a sealing ring (6) is arranged between the valve seat (1) and the valve body (2), and a plug (7) is sleeved at the front end of the movable iron core (5);

the method is characterized in that: the plug (7) is connected with the sealing ring (6) through a diaphragm (8), and the sealing ring (6) is matched with the plug (7) and the diaphragm (8) to hermetically isolate the cavity (21) from the valve cavity (11); under the opening state of the electromagnetic valve, the movable iron core (5) moves towards the cavity (21) to open the medium outlet (4), and at the moment, the medium inlet (3) is communicated with the medium outlet (4); under the state of locking the electromagnetic valve, the movable iron core (5) moves towards the valve cavity (11) to block the medium outlet (4), and at the moment, the medium inlet (3) is not communicated with the medium outlet (4).

2. The micro electromagnetic valve according to claim 1, wherein: the front end of the movable iron core (5) extends forwards to form a boss (51), the bottom of the plug (7) extends towards the inside of the cavity (21) to form a step groove (71), and the boss (51) is matched with the step groove (71) to fix the movable iron core (5) and the plug (7).

3. The micro electromagnetic valve according to claim 1, wherein: the thickness range of the diaphragm (8) is 0.2-0.3 mm.

4. The micro electromagnetic valve according to claim 1, wherein: sealing washer (6), end cap (7) and diaphragm (8) are the integrated into one piece spare of silica gel or rubber material.

5. The micro electromagnetic valve according to claim 1, wherein: the side wall of the cavity (21) extends downwards to form a convex ring (22) inserted into the valve cavity (11), and the sealing ring (6) is positioned between the convex ring (22) and the valve seat (1).

6. The micro electromagnetic valve according to claim 1, wherein: an annular groove (12) is formed in the inner side wall of the valve cavity (11), and the sealing ring (6) is located in the annular groove (12).