CN219493228U

CN219493228U - Electromagnetic valve seat sealing structure and electromagnetic valve

Info

Publication number: CN219493228U
Application number: CN202320811663.6U
Authority: CN
Inventors: 林开良; 郑生明
Original assignee: Ningbo Aokai Combustion Gas Appliance Co ltd
Current assignee: Ningbo Aokai Combustion Gas Appliance Co ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-08-08
Anticipated expiration: 2033-04-12

Abstract

The application discloses a solenoid valve seat sealing structure and solenoid valve, belongs to solenoid valve technical field, and the valve seat sealing structure includes disk seat, sealing gasket and electrode bush, and the disk seat is inside to include first to third cavity, and the diameter of first cavity is less than the third cavity, and the second cavity is connected between first cavity and third cavity and the axial cross section is trapezoidal; the sealing gasket is provided with a through hole and comprises a first sealing part and a second sealing part, the first sealing part is matched with the shape of the second cavity, the first sealing part is arranged in the second cavity, the second sealing part is provided with a step surface protruding in the radial direction relative to the first sealing part, and the step surface is abutted against the top of the third cavity; the top of the electrode bush abuts against the bottom of the second sealing part, the side face abuts against the inner wall of the third cavity, and the bottom of the valve seat is provided with an inwards bent flange so as to abut against the bottom of the electrode bush. The structure is simple and reliable, the sealing performance is good, and the mass production and the assembly are easy.

Description

Electromagnetic valve seat sealing structure and electromagnetic valve

Technical Field

The application relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve seat sealing structure and an electromagnetic valve.

Background

The electromagnetic valves of the gas appliances in the market at present are various in variety, and the internal structural principles of the electromagnetic valves are mostly the same. The electromagnetic valve is characterized in that an electrode contact pin, an electrode bushing and an electrode sealing gasket are arranged in the electromagnetic valve seat, the electrode contact pin penetrates through the electrode bushing and the electrode sealing gasket, the electrode sealing gasket is arranged above the electrode bushing, the upper end face of the electrode bushing is matched with the inner cavity of the valve seat to fix the electrode sealing gasket, however, the electrode sealing gasket is of an O-shaped ring or a relatively flat annular sheet-shaped structure, is easy to shrink and deform, has poor sealing effect, possibly causes gas leakage, and therefore causes safety accidents, and has certain potential safety hazards.

For this reason, a new solenoid valve seat sealing structure needs to be designed.

Disclosure of Invention

An object of the application is to provide a solenoid valve disk seat seal structure, realize simple structure reliable, the leakproofness is good, easy batch production equipment.

Another object of the present application is to provide a solenoid valve using the above-mentioned solenoid valve seat sealing structure.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows: the electromagnetic valve seat sealing structure comprises a valve seat, a sealing gasket and an electrode bushing, wherein a first cavity, a second cavity and a third cavity which are sequentially arranged are arranged in the valve seat, the diameter of the first cavity is smaller than that of the third cavity, and the second cavity is connected between the first cavity and the third cavity and has a trapezoid axial section; the sealing gasket is provided with a through hole which is suitable for penetrating the electrode pin, the sealing gasket comprises a first sealing part and a second sealing part, the first sealing part is matched with the second cavity in shape, the first sealing part is arranged in the second cavity, the second sealing part is provided with a step surface which protrudes radially relative to the first sealing part, and the step surface is abutted against the top of the third cavity; the top of the electrode bush is abutted against the bottom of the second sealing part, the side face is abutted against the inner wall of the third cavity, an inwards bent flange is arranged at the bottom of the valve seat, and the flange is abutted against the bottom of the electrode bush.

Preferably, the valve seat is made of aluminum.

Preferably, the depth of the second cavity is greater than the thickness of the first seal.

Preferably, the included angle of the conical surface of the first sealing portion with respect to the central axis is greater than or equal to 10 degrees and less than or equal to 50 degrees.

Preferably, the second sealing portion is integrally formed with the first sealing portion, and the second sealing portion is cylindrical and has a diameter smaller than that of the third cavity.

Preferably, the electrode bushing is in an inverted T shape in cross section along the axial direction, the electrode bushing includes a rod portion and a cap portion, and the third cavity includes an upper cavity with a smaller diameter and a lower cavity with a larger diameter, the rod portion is disposed in the upper cavity, and the cap portion is disposed in the lower cavity.

Preferably, the top of the rod portion is provided with a chamfer or rounded corner.

Preferably, the wall thickness of the valve seat at the two sides of the lower cavity is more than or equal to 3mm and less than or equal to 15mm.

Preferably, the thickness of the electrode bushing is greater than the thickness of the gasket, wherein the thickness of the second sealing portion is equal to or greater than one fourth of the thickness of the first sealing portion and equal to or less than one half of the thickness of the first sealing portion, and the thickness of the cap portion of the electrode bushing is equal to or less than the thickness of the stem portion.

Further, to achieve another object of the present application, the present application provides a solenoid valve, which uses the above-mentioned solenoid valve seat sealing structure.

Compared with the prior art, the beneficial effect of this application lies in:

(1) The novel structure of the sealing gasket is used, the side surface of the sealing gasket is attached to the inner wall of the second cavity with the trapezoid axial section, so that the contact area between the sealing gasket and the valve seat is larger, the sealing surface of the valve seat, namely the inner wall of the second cavity, is completely made up, and the sealing type of the electromagnetic valve can be greatly improved due to the defect risk generated by processing.

(2) The mounting structure of the electrode bushing and the valve seat is a flanging riveting structure, so that the risk of electrode falling off is completely eradicated.

(3) The flanging structure enables the electrode bushing to be firmly fixed in the valve seat, so that the top of the electrode bushing continuously abuts against the bottom of the sealing gasket, upward supporting force is applied to the sealing gasket, the compression rate of the sealing gasket is guaranteed, tight fit between the sealing gasket and the inner wall of the second cavity is guaranteed, sealing performance is guaranteed, gas leakage is effectively prevented, and potential safety hazards are solved.

Drawings

Fig. 1 is a schematic structural diagram of a solenoid valve provided in the present application;

FIG. 2 is a schematic illustration of a solenoid valve seat seal structure provided herein;

FIG. 3 is a schematic cross-sectional view of a gasket;

FIG. 4 is a schematic view of the structure of an electrode bushing;

in the figure: 10. a valve seat; 1a, a first cavity; 1b, a second cavity; 1ba, balance space; 1c, a third cavity; 1ca, upper cavity; 1cb, lower cavity; 11. flanging; 20. a sealing gasket; 21. a first sealing part; 22. a second sealing part; 221. a step surface; 30. an electrode bushing; 40. an electrode pin; 31. a stem portion; 311. round corners; 32. a cap portion; l, central axis.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 4, the sealing structure of the solenoid valve seat 10 comprises a valve seat 10, a sealing gasket 20 and an electrode bushing 30, wherein a first cavity 1a, a second cavity 1b and a third cavity 1c which are sequentially arranged are arranged inside the valve seat 10, the diameter of the first cavity 1a is smaller than that of the third cavity 1c, the second cavity 1b is connected between the first cavity 1a and the third cavity 1c, and the axial section of the second cavity 1b is trapezoidal; the gasket 20 is provided with a through hole suitable for penetrating the electrode pin 40, the gasket 20 comprises a first sealing part 21 and a second sealing part 22, the first sealing part 21 is matched with the second cavity 1b in shape, the first sealing part 21 is arranged in the second cavity 1b, the second sealing part 22 is provided with a step surface 221 protruding radially relative to the first sealing part 21, and the step surface 221 is abutted against the top of the third cavity 1 c; the top of the electrode bushing 30 abuts against the bottom of the second sealing portion 22, the side faces abut against the inner wall of the third cavity 1c, the bottom of the valve seat 10 is provided with a flange 11 bent inwards, and the flange 11 abuts against the bottom of the electrode bushing 30.

Compared with the prior art, in the embodiment, the axial section of the second cavity 1b is trapezoid, the sealing gasket 20 comprises a first sealing part 21 which is matched with the shape of the second cavity 1b, and a sealing structure is formed by the fit of the conical surface on the outer side of the first sealing part 21 and the inner wall of the second cavity 1 b; the mounting structure of the electrode bushing 30 and the valve seat 10 is a flanging 11 riveting structure, so that the risk of electrode falling off is completely eradicated; the flange 11 structure ensures that the electrode bushing 30 is firmly fixed in the valve seat 10, so that the top of the electrode bushing 30 continuously abuts against the bottom of the sealing gasket 20, upward supporting force is applied to the sealing gasket 20, the compression rate of the sealing gasket 20 is ensured, the sealing gasket 20 is tightly attached to the inner wall of the second cavity 1b, the tightness is ensured, the gas leakage is effectively prevented, and the potential safety hazard is solved; the second sealing portion 22 is provided with a stepped surface 221 capable of abutting against the top of the third chamber 1c, so that the gasket 20 can be prevented from being inserted too deeply into the second chamber 1b, and the gasket 20 can be prevented from being excessively compressed.

Preferably, the valve seat 10 is made of aluminum. The valve seat 10 of the copper material that the solenoid valve of the gas flameout protection device in the market at present mainly adopts, this application changes the valve seat 10 material into the aluminium material, makes product weight lighter, reduces the material cost and the cost on the transportation of product.

As one preference, the depth of the second cavity 1b is greater than the thickness of the first seal 21. When the first sealing part 21 is inserted into the second cavity 1b, a margin space 1ba is reserved at the top of the second cavity 1b, and the diameter of the margin space 1ba is smaller than that of the top of the first sealing part 21, so that the sealing gasket 20 can be limited.

The first cavity 1a is used for allowing a wire to pass through, so that the wire connects the electrode pin 40 and the static iron core.

Preferably, the included angle x of the conical surface of the first seal portion 21 with respect to the central axis l is 10 degrees or more and 50 degrees or less. It can be understood that, in order to ensure the structural strength of the valve seat 10, the wall thickness on both sides of the second cavity 1b needs to be controlled within a certain range, and the greater the included angle x, the quickly thinned the wall thickness of the valve seat 10 on both sides of the second cavity 1b, the smaller the depth of the second cavity 1b can be opened, and the smaller the included angle x, the smaller the acting force of the inner wall of the second cavity 1b on the first sealing portion 21, and the worse the sealing effect after the two surfaces are bonded.

Specifically, in this embodiment, the included angle x is 30 degrees.

The second sealing part 22 and the first sealing part 21 are integrally formed, the second sealing part 22 is cylindrical, the sealing gasket 20 is simple in structure and easy to machine and form, and assembly is facilitated.

And the diameter of the second sealing part 22 is smaller than that of the third cavity 1c, so as to reduce the friction between the second sealing part 22 and the third cavity 1c, and facilitate the sealing gasket 20 to be inserted into the third cavity 1c from bottom to top when the electromagnetic valve is assembled.

Preferably, the electrode bushing 30 has an inverted T-shaped cross section in the axial direction, the electrode bushing 30 includes a stem 31 and a cap 32, the third cavity 1c includes an upper cavity 1ca having a smaller diameter and a lower cavity 1cb having a larger diameter, the stem 31 is disposed in the upper cavity 1ca, and the cap 32 is disposed in the lower cavity 1cb. The stem 31 is inserted into the upper cavity 1ca to provide support for the gasket 20, and the cap 32 can be abutted against the top of the lower cavity 1cb, so that the insertion depth of the stem 31 is limited, and in addition, the diameter of the cap 32 is larger, which means that the wall thickness of the valve seat 10 at two sides of the cap 32 can be relatively thinner, thereby being beneficial to the processing and forming of the flanging 11 structure.

Preferably, the top of the stem 31 is provided with a chamfer or rounded corner 311 to facilitate insertion of the stem 31 into the third cavity 1c.

As a preferable mode, the wall thickness of the portion of the valve seat 10 located at both sides of the lower cavity 1cb is 3mm or more and 15mm or less, the valve seat 10 can be processed to form the flange 11 under the action of a large external force, and under the normal use condition, the flange 11 structure has a certain structural strength, so that the electrode bushing 30 can be limited, and the electrode is prevented from falling off.

It can be appreciated that in the assembly process, the electrode bushing 30 is inserted into the third cavity 1c to a proper position, and then the bottom of the valve seat 10 is bent to form the flange 11, so that the assembly process is simple, and the whole electromagnetic valve seat 10 sealing structure can be automatically produced and assembled in a large batch.

As one preferable example, the thickness of the electrode bushing 30 is greater than the thickness of the gasket 20, wherein the thickness of the second sealing portion 22 is equal to or greater than one fourth of the thickness of the first sealing portion 21 and equal to or less than one half of the thickness of the first sealing portion 21, that is, the majority of the gasket 20 is included in the first sealing portion 21 for sealing, and the minority is included in the second sealing portion 22 for limiting, thereby improving the assembly efficiency, and similarly, the thickness of the cap portion 32 of the electrode bushing 30 is equal to or less than the thickness of the stem portion 31.

Furthermore, the application provides a solenoid valve, and the solenoid valve seat 10 sealing structure has the characteristics of simple and reliable structure, good sealing performance and easiness in mass production and assembly.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims

1. A solenoid valve disk seat seal structure, its characterized in that: comprises a valve seat, a sealing gasket and an electrode bushing,

the valve seat comprises a first cavity, a second cavity and a third cavity which are sequentially arranged, the diameter of the first cavity is smaller than that of the third cavity, the second cavity is connected between the first cavity and the third cavity, and the axial section of the second cavity is trapezoidal;

the sealing gasket is provided with a through hole which is suitable for penetrating the electrode pin, the sealing gasket comprises a first sealing part and a second sealing part, the first sealing part is matched with the second cavity in shape, the first sealing part is arranged in the second cavity, the second sealing part is provided with a step surface which protrudes radially relative to the first sealing part, and the step surface is abutted against the top of the third cavity;

the top of the electrode bush is abutted against the bottom of the second sealing part, the side face is abutted against the inner wall of the third cavity, an inwards bent flange is arranged at the bottom of the valve seat, and the flange is abutted against the bottom of the electrode bush.

2. The solenoid valve seat sealing structure as described in claim 1 wherein: the valve seat is made of aluminum.

3. The solenoid valve seat sealing structure as described in claim 1 wherein: the depth of the second cavity is greater than the thickness of the first seal.

4. The solenoid valve seat sealing structure as described in claim 1 wherein: the included angle of the conical surface of the first sealing part relative to the central axis is more than or equal to 10 degrees and less than or equal to 50 degrees.

5. The solenoid valve seat sealing structure as described in claim 1 wherein: the second sealing part and the first sealing part are integrally formed, and the second sealing part is cylindrical and has a diameter smaller than that of the third cavity.

6. A solenoid valve seat sealing structure as described in any one of claims 1 to 5, wherein: the electrode bush is reverse T-shaped along axial cross section, the electrode bush includes pole portion and cap portion, and is corresponding, the third cavity includes the great lower cavity of the little last cavity of diameter and diameter, pole portion set up in go up the cavity, the cap portion set up in the cavity down.

7. The solenoid valve seat sealing structure as described in claim 6 wherein: the top of the rod part is provided with a chamfer or a round angle.

8. The solenoid valve seat sealing structure as described in claim 6 wherein: the wall thickness of the part of the valve seat, which is positioned at the two sides of the lower cavity, is more than or equal to 3mm and less than or equal to 15mm.

9. The solenoid valve seat sealing structure as described in claim 6 wherein: the thickness of the electrode bushing is greater than the thickness of the sealing gasket, wherein the thickness of the second sealing part is greater than or equal to one fourth of the thickness of the first sealing part and less than or equal to one half of the thickness of the first sealing part, and the thickness of the cap part of the electrode bushing is less than or equal to the thickness of the rod part.

10. Electromagnetic valve, its characterized in that: use of a solenoid valve seat sealing arrangement as claimed in any one of claims 1 to 9.