CN219300039U

CN219300039U - Normally open electromagnetic valve

Info

Publication number: CN219300039U
Application number: CN202222570551.4U
Authority: CN
Inventors: 郭建强; 王军; 谢银峰; 张盛达
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-07-04
Anticipated expiration: 2032-09-28

Abstract

The utility model relates to a normally open electromagnetic valve which comprises a valve seat, a piston, a coil assembly and a valve mounting seat, wherein the valve seat is arranged on the valve mounting seat, a third O-shaped ring is arranged on an opening of the valve mounting seat, a step part at the upper end of the valve seat presses the third O-shaped ring, the piston capable of sealing a lower opening of the valve seat is arranged in the valve seat, a valve cover assembly is arranged on the upper opening of the valve seat, the coil assembly is arranged at the upper end of the valve seat, a movable iron core which moves up and down is arranged in the middle part of the coil assembly, a static iron core which penetrates through the valve cover assembly is arranged below the movable iron core, a valve needle is arranged in the lower end of the movable iron core, the lower end of the valve needle penetrates through the static iron core to correspond to a central hole of the piston, and a return spring is arranged in the upper end of the static iron core. The utility model has the characteristics of small volume, convenient installation, few parts, reduced product cost, balanced front and back pressure when the valve needle moves, reduced hysteresis and the like.

Description

Normally open electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to a normally open electromagnetic valve.

Background

Various solenoid valves are often used in thermal management systems to facilitate control and regulation of fluid media, and common solenoid valves include valve seats, pistons, valve cover assemblies, and coil assemblies. The valve seat comprises a connecting part, the electromagnetic valve is connected with other parts through the connecting part, and the leakage is solved by using a sealing ring.

When the valve needle moves, the conventional electromagnetic valve has unbalanced front and back pressure, which can cause motion retardation of the piston and influence the response speed of the electromagnetic valve, so that the electromagnetic valve needs to be improved to solve the problem.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the normally open electromagnetic valve, which has the characteristics of small volume, convenient installation, few parts, reduced product cost, balanced front and back pressure when the valve needle moves, reduced hysteresis and the like.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a normally open solenoid valve, including disk seat, piston, coil assembly and valve mount pad, the disk seat install at the valve mount pad, the opening of valve mount pad on install the third O shape circle, the upper end step portion of disk seat push down the third O shape circle, the disk seat in install the piston that can seal disk seat lower extreme open-ended, the upper opening of disk seat on install the valve gap subassembly, the disk seat upper end install the coil assembly, the middle part of coil assembly in install the movable core that reciprocates, movable core below install the quiet iron core that passes the valve gap subassembly, movable core lower extreme in install the needle, the needle lower extreme pass quiet iron core and correspond with the centre bore of piston, quiet iron core upper end in install the return spring, the return spring cup joint in the upper end of return spring and movable core lower extreme looks top, movable core side be close to valve needle upper end department and be provided with first balanced hole, quiet iron core in install the second balanced hole of intercommunication spring mounting position and piston upper portion.

The second plate Heng Kongcheng in the technical scheme is vertically arranged, the first balance hole is horizontally arranged, the outer ring at the lower end of the movable iron core is of a conical structure with a large upper part and a small lower part, and the upper end of the static iron core is provided with a conical hole structure matched with the lower end of the movable iron core.

As a supplement to the technical scheme, a movable iron core spring with the lower end propped against the valve needle is arranged in the upper part of the movable iron core.

As a supplement to the technical scheme, a first sealing gasket is embedded and installed at the position of a central hole at the upper end of the piston, a through hole is formed in the center of the first sealing gasket, and the through hole corresponds to the lower end of the valve needle.

As a supplement to the technical scheme, the lower part of the piston is sleeved with a supporting spring, and the lower end of the supporting spring is in butt joint with a supporting extension in the lower opening of the valve seat.

In addition to the technical scheme, a second sealing gasket is embedded and installed in the lower end of the piston, and the second sealing gasket can be contacted with the supporting extension edge in the lower opening of the valve seat to form a seal.

As a supplement to the technical scheme, the outer ring of the valve cover assembly is provided with a first O-shaped ring for sealing the upper opening of the valve seat, and the outer ring of the upper part of the valve cover assembly is in butt joint with the valve seat through threads.

In addition to the technical scheme, the outer ring at the upper part of the valve seat is provided with a threaded connection part.

As a supplement to the technical scheme, the lower end of the valve seat is sleeved with a second O-shaped ring.

The beneficial effects are that: the utility model relates to a normally open electromagnetic valve, which has the following specific advantages:

(1) The volume is reduced, and the space advantage is greatly improved;

(2) The screw connection is used, so that the installation is convenient;

(3) And a balance hole is respectively arranged on the movable iron core and the static iron core and communicated with the three cavities, so that the front pressure and the back pressure are balanced when the valve needle moves, and the hysteresis is reduced.

Drawings

FIG. 1 is a structural view of the present utility model;

FIG. 2 is a full cross-sectional view of the present utility model;

FIG. 3 is a view of the structure of the present utility model at the first balance hole and the second balance hole;

fig. 4 is a structural view of a screw connection according to the present utility model.

The diagram is: 1. valve seat, 2, piston, 3, valve gap subassembly, 4, first sealing pad, 5, second sealing pad, 6, move the iron core spring, 7, return spring, 8, move the iron core, 9, quiet iron core, 10, coil subassembly, 11, first O shape circle, 12, second O shape circle, 13, valve mount pad, 14, needle, 15, supporting spring, 81, first balancing hole, 91, second balancing hole, 16, threaded connection portion, 17, third O shape circle.

Detailed Description

The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.

The embodiment of the utility model relates to a normally open electromagnetic valve, which comprises a valve seat 1, a piston 2, a valve cover assembly 3, a first sealing gasket 4, a second sealing gasket 5, a movable iron core spring 6, a return spring 7, a movable iron core 8, a static iron core 9, a coil assembly 10, a valve needle 14 and the like as shown in fig. 1-4.

The valve seat 1 comprises a threaded connection part 16, the electromagnetic valve forms threaded butt joint with the valve mounting seat 13 through the threaded connection part 16, a circle of annular groove is formed in the mounting opening of the mounting valve seat 13, a third O-shaped ring 17 is mounted in the annular groove, and when the valve seat 1 is in butt joint, the step surface at the upper end presses the third O-shaped ring 17 to form sealing.

The valve seat 1 is internally provided with an inner cavity for the piston 2 to move, the cavity is internally provided with a valve cover assembly 3 and the piston 2, the valve cover assembly 3 is arranged on the piston 2, a cavity is formed by matching the valve cover assembly 3 and the piston 2, the valve cover assembly 3 is in threaded connection with the inside of the valve seat 1, a first O-shaped ring 11 is arranged between the valve cover assembly 3 and the inner wall of the valve seat 1, one side of the lower part of the valve seat 1 is provided with an air inlet, the bottom of the valve seat 1 is provided with an air outlet, and the lower part of the valve seat 1 is provided with a second O-shaped ring 12 at the opening of the air outlet. A pressure relief hole is vertically formed in the middle of the piston 2, a second sealing gasket 5 is arranged at the lower part of the piston 2, and the second sealing gasket 5 is sleeved at the lower port of the pressure relief hole of the piston 2; the upper part of the pressure relief hole of the piston 2 is provided with a groove, and a first sealing gasket 4 is arranged in the groove. The valve seat 1 is provided with a coil assembly 10, and the coil assembly 10 consists of a coil framework, a coil winding, an injection molding shell and a coil yoke. The coil framework is sleeved with a coil winding, the coil winding and the coil winding are wrapped by an injection molding shell, and a coil yoke is arranged outside the injection molding shell. TVS, terminal and other structures are also arranged in the injection molding shell.

The coil skeleton internally mounted has movable iron core 8 and quiet iron core 9, and movable iron core 8 lower extreme is the round platform form, and quiet iron core 9 upper end is the round platform hole with it complex. The valve needle 14 is arranged in the hole of the movable iron core 8, the movable iron core spring 6 is arranged at the upper part of the valve needle 14, the valve needle 14 extends out of the hole of the movable iron core 8 and penetrates through the hole of the static iron core 9, and the restoring spring 7 is arranged between the movable iron core 8 and the static iron core 9 and sleeved on the valve needle 14.

In order to balance the front and back pressure and reduce hysteresis when the valve needle 14 moves, a first balance hole 81 is arranged at the lower part of an inner hole of the movable iron core 8, so that the upper cavity and the lower cavity of the movable iron core 8 are connected; a second balance hole 91 is arranged at the lower part of the inner hole of the static iron core 9, so that the upper cavity and the lower cavity of the static iron core 9 are connected. The movable iron core 8 is internally provided with a movable iron core spring 6 in a compressed state, the movement of the movable iron core 8 is controlled by an electromagnet of a coil winding, and the movable iron core 8 moves to drive the valve needle 14 to move; the valve needle 14 is in contact with the first sealing gasket 4 of the piston, so that the piston 2 is pushed to move by the up-down pressure difference, and the air outlet is sealed by the piston 2.

The piston also comprises a piston 2 and a supporting spring 15 at the lower part, wherein the lower end of the supporting spring 15 is propped against the side wall of the air outlet edge of the valve seat 1, and the upper end of the supporting spring is propped against the lower part of the piston 2, and the supporting spring 15 is used for ensuring that the piston 2 does not seal the air outlet in normal state.

Examples

(1) When the electromagnetic valve is in a normally open state, the supporting spring 15 at the lower part of the piston 2 supports the whole device, so that the air inlet and the air outlet are in an open state;

(2) When the electromagnetic valve is started, the electromagnetic winding is electrified, the movable iron core 8 is controlled to move downwards, the movable iron core 8 drives the valve needle 14, so that the valve needle 14 moves downwards to seal the pressure relief hole of the first sealing gasket 4 on the piston 2, the pressure of the upper cavity is increased, and under the action of the pressure difference, the whole piston 2 and the movable iron core 8 move downwards until the air outlet of the valve seat 1 is sealed, and the closing action of the normally open electromagnetic valve is realized;

(3) When the electromagnetic valve is restored to be opened, the coil winding is powered off, the movable iron core 8 is restored under the action of the restoring spring 7 and moves upwards, the valve needle 14 moves upwards along with the movable iron core 8, the pressure relief hole is opened, the pressure difference is formed between the upper cavity and the lower cavity, the piston 2 moves upwards under the action of the supporting spring 15 at the lower part of the piston 2, and the air inlet is opened, so that the normally open electromagnetic valve is restored.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The foregoing has described in detail a normally open solenoid valve provided herein, with specific examples being used herein to illustrate the principles and embodiments of the present application, the above examples being provided only to assist in understanding the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A normally open solenoid valve, includes disk seat (1), piston (2), coil pack (10) and valve mount pad (13), its characterized in that: the valve seat (1) install at valve mount pad (13), the opening of valve mount pad (13) on install third O shape circle (17), the upper end step portion of valve seat (1) push down third O shape circle (17), valve seat (1) in install can seal valve seat (1) lower open-ended piston (2), the upper opening of valve seat (1) on install valve gap subassembly (3), valve seat (1) upper end install coil subassembly (10), coil subassembly (10) in the middle part install iron core (8) that reciprocate, iron core (8) below install and pass iron core (9) of valve gap subassembly (3), iron core (8) lower extreme in install needle (14), iron core (9) lower extreme pass iron core (9) and piston (2) centre bore and correspond, iron core (9) upper end in install return spring (7), spring (7) in the upper end of valve core, iron core (8) on the upper end of coil subassembly (10) install iron core (8) and move up and down, valve needle (9) lower extreme and valve needle (9) are close to one and are provided with the top balance of valve needle (8), the static iron core (9) is internally provided with a second balance hole (91) which is communicated with the installation position of the return spring (7) and the upper cavity of the piston (2).

2. A normally open solenoid valve according to claim 1, wherein: the movable iron core spring (6) with the lower end propped against the valve needle (14) is arranged in the upper part of the movable iron core (8).

3. A normally open solenoid valve according to claim 1, wherein: the central hole of piston (2) upper end department embedding install first sealed pad (4), first sealed pad (4) center department be provided with the through-hole, the through-hole corresponds with needle (14) lower extreme.

4. A normally open solenoid valve according to claim 1, wherein: the lower part of the piston (2) is sleeved with a supporting spring (15), and the lower end of the supporting spring (15) is in butt joint with a supporting extension in the lower opening of the valve seat (1).

5. The normally open solenoid valve according to claim 4, wherein: the lower end of the piston (2) is embedded and provided with a second sealing gasket (5), and the second sealing gasket (5) can be contacted with a supporting extension edge in the lower opening of the valve seat (1) to form sealing.

6. A normally open solenoid valve according to claim 1, wherein: the outer ring of the valve cover assembly (3) is provided with a first O-shaped ring (11) for sealing an upper opening of the valve seat (1), and the outer ring of the upper part of the valve cover assembly (3) is in butt joint with the valve seat (1) through threads.

7. A normally open solenoid valve according to claim 1, wherein: the outer ring at the upper part of the valve seat (1) is provided with a threaded connection part (16).

8. A normally open solenoid valve according to claim 1, wherein: the lower end of the valve seat (1) is sleeved with a second O-shaped ring (12).