CN215214974U

CN215214974U - Compact electromagnetic valve

Info

Publication number: CN215214974U
Application number: CN202121208445.0U
Authority: CN
Inventors: 张林江
Original assignee: Xinchang Benshang Refrigerating Technology Co ltd
Current assignee: Xinchang Benshang Refrigerating Technology Co ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-12-17
Anticipated expiration: 2031-06-01

Abstract

The invention provides a compact electromagnetic valve, which comprises a sleeve, a static seal head arranged in the sleeve, a movable iron core and a coil outside the sleeve, wherein the movable iron core is arranged in the sleeve; a valve seat is arranged in one end of the sleeve, which is different from the static seal head, the outer end face of the valve seat is simultaneously provided with an inlet and an outlet, and the inner end face of the valve seat is provided with a matching part which protrudes inwards and is matched with the steel ball on the movable iron core; the central hole of the valve seat is coaxial with the sleeve, and the central hole is communicated with the outlet; the annular cavity between the matching part and the sleeve is communicated with the inlet; an inlet pipe is arranged on the inlet, and an outlet pipe is arranged on the outlet. The valve seat of the electromagnetic valve is installed in the sleeve, the occupied space is small, the valve seat is made of stainless steel materials, the structure is simplified, materials are saved, and the production cost is low. And the valve seat is fixed with the sleeve through argon welding, and the concentricity of the valve port of the valve seat and the sleeve is easily ensured, so that after assembly, the component matching precision is high, and the possibility of inner leakage is effectively reduced.

Description

Compact electromagnetic valve

Technical Field

The invention belongs to the technical field of refrigeration equipment control, and particularly relates to a compact electromagnetic valve.

Background

Electromagnetic valves are electromagnetically controlled industrial devices, are basic automation elements for controlling fluids, belong to actuators, and are generally used in industrial control systems to regulate the direction, flow rate, speed and other parameters of media. For the direct-acting electromagnetic valve, when the electromagnetic valve is electrified, the electromagnetic coil generates electromagnetic force to lift the closing member from the valve seat, and the valve is opened; when the power is cut off, the electromagnetic force disappears, the spring presses the closing part on the valve seat, and the valve is closed. Among the prior art, the import pipe and the outlet pipe of solenoid valve are 90 degrees contained angles and arrange, and advance, the outlet pipe is fixed respectively on two directions of disk seat, and the disk seat generally adopts the brass preparation, and not only the structure is complicated, difficult processing to assembly precision also is difficult to obtain reliable guarantee, the interior hourglass condition appears easily, and the product percent of pass is low. In addition, after the electromagnetic valve is used for a long time, the elements for controlling opening and closing in the valve are easy to wear, when the elements for controlling opening and closing are worn, the electromagnetic valve inevitably generates internal leakage, and the electromagnetic valve needs to be replaced or maintained. Accordingly, there is a need for improvements to existing solenoid valves.

Disclosure of Invention

In view of this, the present invention provides a compact solenoid valve to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a compact electromagnetic valve comprises a sleeve, a static seal head arranged in the sleeve, a movable iron core and a coil outside the sleeve; a valve seat is arranged in one end of the sleeve, which is different from the static seal head, the outer end face of the valve seat is simultaneously provided with an inlet and an outlet, and the inner end face of the valve seat is provided with a matching part which protrudes inwards and is matched with the steel ball on the movable iron core; the central hole of the valve seat is coaxial with the sleeve, and the central hole is communicated with the outlet; the annular cavity between the matching part and the sleeve is communicated with the inlet; an inlet pipe is arranged on the inlet, and an outlet pipe is arranged on the outlet.

Further, the valve seat is made of stainless steel.

Further, the valve seat and the sleeve are welded and fixed through argon arc welding.

Furthermore, the inlet pipe adopts a reducing structure, and one end of the small diameter of the inlet pipe is inserted into the inlet.

Furthermore, the outlet pipe adopts a reducing structure, and one end of the small diameter of the outlet pipe is inserted into the air inlet.

Further, the axial direction of the inlet and the axial direction of the outlet are the same as the axial direction of the sleeve.

Further, an inlet and an outlet on the valve seat are eccentrically arranged.

Furthermore, a sub-magnetic ring is arranged on the static sealing head.

Compared with the prior art, the invention has the following advantages:

the valve seat of the electromagnetic valve is installed in the sleeve, the occupied space is small, the structural arrangement is easy, the limitation is small, the valve seat is made of stainless steel, the structure is simplified, materials are saved, and the production cost is low. And the valve seat is fixed with the sleeve through argon welding, and the concentricity of the valve port of the valve seat and the sleeve is easily ensured, so that after assembly, the component matching precision is high, and the possibility of inner leakage is effectively reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a valve seat in an embodiment of the present invention;

FIG. 3 is a schematic view of a valve seat with an internal leakage prevention structure in an embodiment of the present invention;

FIG. 4 is a schematic structural view of the present invention when the valve port is not worn, the steel ball and the inner leakage prevention structure are not engaged;

FIG. 5 is a schematic view of a position relationship between the steel ball and the inner leakage prevention structure in FIG. 4;

FIG. 6 is a schematic structural diagram of the invention in a state that the steel ball is matched with the inner leakage prevention structure after the valve port is worn;

fig. 7 is a schematic view of the fitting relationship between the steel ball and the inner leakage preventing structure in fig. 6.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A compact electromagnetic valve, as shown in fig. 1 and 2, comprises a sleeve 1, a static seal head 2 installed in the sleeve, a movable iron core 3, and a coil outside the sleeve, wherein a spring is arranged between the movable iron core and the static seal head, generally, a sub-magnetic ring 15 is arranged on the static seal head, and the electromagnetic valve coil is electrified to control the movement of the movable iron core, which is a conventional technique in the field and is not described herein again. A valve seat 4 is arranged in one end of the sleeve, which is different from the static end socket, the outer end face of the valve seat (the end face facing the outer side of the sleeve) is simultaneously provided with an inlet 5 and an outlet 6, and the inner end face of the valve seat is provided with a matching part 7 (protruding inwards) which is matched with a steel ball 16 on the movable iron core; the central hole 8 of the valve seat is coaxial with the sleeve and is communicated with the outlet, so that the valve port of the valve seat can be accurately matched with the steel ball at the tail end of the movable iron core, and on-off control operation is realized. The annular cavity 11 between the matching part and the sleeve is communicated with the inlet; an inlet pipe 9 is mounted on the inlet and an outlet pipe 10 is mounted on the outlet.

In an alternative embodiment, the valve seat includes a valve seat body 17, a mounting portion 18 at a lower end of the valve seat body, and a mating portion 19 at an upper end of the valve seat body; the center hole is located at the center of the valve seat main body (and the matching part), namely, the axes of the valve seat main body and the matching part are in the same straight line with the axis of the valve seat center hole.

The central hole penetrates through the matching part, and a valve port is formed at the tail end of the matching part. When the structure is designed, the outer diameter of the matching part is smaller than that of the valve seat main body, and the outer diameter of the valve seat main body is smaller than that of the mounting part; a first step is formed at the joint of the valve seat main body and the mounting part, and one side of the first step, which faces the matching part, is provided with an assembling positioning surface; the joint of the matching part and the valve seat main body forms a second step, and one side of the second step, which faces the matching part, is provided with an annular cavity bottom surface.

The valve seat body is provided with a through hole 20 which extends from the valve seat body to the matching part to enable the inlet to be communicated with the annular cavity at the upper part of the second stepped ring. The diameter of the inlet is larger than the diameter of the through hole, the through hole is extended to the matching part from the valve seat main body, the middle position of the matching part is stopped, when drilling is carried out, the central position of the drill bit does not need to be adjusted, the drill bit with the matched specification only needs to be replaced, the processing is convenient, and the difficulty is low.

The valve seat main body, the matching part and the mounting part are made of stainless steel materials in an integrated forming mode, the valve seat main body is of a cylindrical structure, the surface of the outer wall of the valve seat main body is provided with a sleeve matching surface, the mounting part is of a cylindrical structure, and the outer diameter of the mounting part is consistent with the outer diameter of a sleeve of the electromagnetic valve assembled by the seat. The valve seat main part is tightly matched with the sleeve, after the tail end of the sleeve props against the assembly positioning surface at the first step, the valve seat is assembled in place, the sleeve and the valve seat are welded and fixed through argon welding, and the concentricity of the sleeve and the valve port is high.

In an alternative embodiment, as shown in fig. 3 to 7, an inner leakage preventing structure 21 is formed at the top end of the fitting portion of the valve seat, specifically, the inner leakage preventing structure includes a boss 22 having a central portion penetrating through the central hole, and an annular inner lip 23 is formed on the inner wall of the boss, and the inner diameter of the inner lip is larger than the diameter of the central hole and smaller than the diameter of the steel ball. The inner lip and the valve port respectively correspond to different parts of the steel ball (in the vertical direction, the plane where the inner lip is located is closer to the center of the steel ball). Usually, the inner diameter of the inner lip is 1-3mm larger than the diameter of the central hole.

Under the conventional use condition, when the valve port part was not worn and torn promptly, the steel ball formed sealed relation with the valve port cooperation, guaranteed that the solenoid valve does not have interior hourglass, in case a certain amount of wearing and tearing appear in steel ball and valve port department, then the steel ball can contact with the lip mouth in the mouth, formed sealedly, avoided interior hourglass aggravation. Through the inner lip that sets up, can effectual extension solenoid valve's life to, can further improve the reliability of solenoid valve, with the interior hourglass that the component wearing and tearing that control in the solenoid valve opened and shut caused reduce to controllable scope, when wearing and tearing a certain amount in addition, under the solenoid valve closure state, the steel ball can cooperate with inner lip, leak in the guarantee solenoid valve does not have.

Due to the design of the inner leakage prevention structure, the service life of the electromagnetic valve is prolonged by more than one time at least, and the steel ball can still be matched with the inner lip to realize sealing even if the electromagnetic valve is not matched in place due to abrasion or some reasons. It should be pointed out that the upper edge of the inner lip can be designed into an inclined plane, so that the electromagnetic valve adapts to natural abrasion when being matched with a steel ball, always keeps a sealing matching relation, and can prolong the service life of the electromagnetic valve.

The axial direction of the inlet and the axial direction of the outlet are the same as the axial direction of the sleeve. In order to keep the structure compact and facilitate the structure arrangement, the inlet and the outlet on the valve seat are eccentrically arranged, the central hole of the valve seat is communicated with the outlet, and the valve port 14 on the inner side of the central hole can be communicated with the annular cavity when the movable iron core is in an open state.

The valve seat is made of stainless steel, the valve seat and the sleeve are welded and fixed through argon arc welding, the concentricity of the sleeve and the valve port cannot be affected, the assembly precision of the valve seat and the sleeve is ensured, the matching precision of a steel ball on the movable iron core and the valve port is further ensured, the internal leakage is effectively reduced, and the matching part protrudes out of the valve seat main body, so that the valve port is easier to machine, the machining precision is easier to ensure, and the manufacturing cost can be well controlled.

In an alternative embodiment, the inlet pipe is of a reducing structure, the small-diameter end 12 of the inlet pipe is inserted into the inlet and fixed by brazing, and the large-diameter end 13 of the inlet pipe is arranged outwards. The outlet pipe adopts a reducing structure, the small diameter end of the outlet pipe is inserted into the air outlet, and the large diameter end of the outlet pipe is arranged outwards and is fixed by brazing and welding. Under the condition of ensuring that the flow is not changed, the material is saved, the occupied space of the electromagnetic valve and the connecting pipe is reduced, the structure is compact, the structural arrangement is easy, and the limitation is small. The inlet pipe and the outlet pipe are generally arranged in parallel, and when the connection direction needs to be changed, the inlet pipe and/or the outlet pipe are/is bent or a pipe with a bent angle is adopted.

When the coil is electrified, the movable iron core moves upwards, the valve is opened, and a medium flows from the inlet pipe to the outlet pipe; when the coil is powered off, the movable iron core is reset downwards, the steel ball at the tail end of the movable iron core is tightly attached to the valve port, the valve is closed, and the medium is cut off from the inlet pipe to the outlet pipe. Compared with an external assembling form of the valve seat of the electromagnetic valve in the prior art, the valve seat of the electromagnetic valve is installed in the sleeve, the occupied space is small, the structural arrangement is easy, and the limitation is small.

The valve seat is made of stainless steel, so that the structure is simplified, the material is saved, and the production cost is low. And the valve seat is fixed with the sleeve through argon welding, and the concentricity of the valve port of the valve seat and the sleeve is easily ensured, so that after assembly, the component matching precision is high, and the possibility of inner leakage is effectively reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. A compact electromagnetic valve comprises a sleeve, a static seal head arranged in the sleeve, a movable iron core and a coil outside the sleeve; the method is characterized in that: a valve seat is arranged in one end of the sleeve, which is different from the static end socket, the outer end face of the valve seat is simultaneously provided with an inlet and an outlet, and the inner end face of the valve seat is provided with a matching part matched with the steel ball on the movable iron core; the central hole of the valve seat is coaxial with the sleeve, and the central hole is communicated with the outlet; the annular cavity between the matching part and the sleeve is communicated with the inlet; an inlet pipe is arranged on the inlet, and an outlet pipe is arranged on the outlet.

2. A compact solenoid valve according to claim 1, characterized in that: the valve seat is made of stainless steel.

3. A compact electromagnetic valve according to claim 1 or 2, characterized in that: and the valve seat and the sleeve are welded and fixed by argon arc welding.

4. A compact solenoid valve according to claim 1, characterized in that: the inlet pipe adopts a reducing structure, and one end of the small diameter of the inlet pipe is inserted in the inlet.

5. A compact electromagnetic valve according to claim 1 or 4, characterized in that: the outlet pipe adopts a reducing structure, and one end of the small diameter of the outlet pipe is inserted into the air inlet.

6. A compact solenoid valve according to claim 1, characterized in that: the axial direction of the inlet and the axial direction of the outlet are the same as the axial direction of the sleeve.

7. A compact electromagnetic valve according to claim 1 or 6, characterized in that: and the inlet and the outlet on the valve seat are eccentrically arranged.

8. A compact solenoid valve according to claim 1, characterized in that: and the static sealing head is provided with a sub-magnetic ring.