WO2021130020A1

WO2021130020A1 - Solenoid valve and gas cooktop

Info

Publication number: WO2021130020A1
Application number: PCT/EP2020/085196
Authority: WO
Inventors: Qiang Zhou; Feng Jiang; Xiaojuan CHEN
Original assignee: BSH Hausgeräte GmbH
Priority date: 2019-12-24
Filing date: 2020-12-09
Publication date: 2021-07-01
Also published as: ES2921248B2; CN114930065A; ES2921248A2; JP2023508965A; ES2921248R1; CN211901785U

Abstract

Embodiments of the present application relate to the technical field of valves, and provide a solenoid valve and a gas cooktop. The solenoid valve includes a valve body, a valve stem, and an electromagnet. The valve body includes a mounting hole. A sealing member is disposed on a peripheral wall of the mounting hole. The valve stem is disposed passing through the mounting hole, and is in sealed connection to the mounting hole by the sealing member. The electromagnet is disposed in an inner cavity of the valve body, and is configured to attract the valve stem to move towards an armature. The gas cooktop includes the solenoid valve. In the solenoid valve, the mounting hole of the valve body is provided with the seal member, so that the valve stem can be effectively sealed by the sealing member, to achieve the advantages of a simple seal assembly mode and an adequate sealing effect.

Description

SOLENOID VALVE AND GAS COOKTOP

BACKGROUND

Technical Field

The present application relates to the technical field of valves, and in particular, to a solenoid valve.

Related Art

A solenoid valve is a common control element used to control on and off states of liquid and gas flow in a pipeline, and usually includes a housing, a valve stem, and electromagnets separately arranged in the housing. The electrifying states of the electromagnets are controlled to control an armature to attract the valve stem to change the opening and closing states of the solenoid valve.

However, in the prior art, in an assembly mode of the housing and the valve stem of the solenoid valve, a mounting hole is usually provided in the housing, and a small clearance fit is formed between the mounting hole and the valve stem to implement the sealing and mounting of the housing and the valve stem. However, the sealing in this assembly mode is poor. During use, some liquid and gas in the pipeline tends to enter the housing of the solenoid valve through small clearances between the mounting hole and the valve stem to corrode the electromagnet.

In view of the above, the solenoid valve in the prior art has problems that the assembly mode of the housing and the valve stem has poor sealing and is prone to armature or coil corrosion.

SUMMARY

For this purpose, the present application provides a solenoid valve used to resolve the problem in the prior art that a seal assembly mode of a housing and a valve stem in the solenoid valve tends to fail and is prone to armature or coil corrosion.

The solenoid valve according to the present application includes a valve body, a valve stem, and an electromagnet, where the valve body includes an inner cavity and a mounting hole connecting the inner cavity to the external environment, and a sealing member is disposed on a peripheral wall of the mounting hole; the valve stem is disposed passing through the mounting hole and partially located in the inner cavity, and is in sealed connection to the mounting hole by the sealing member; and the electromagnet is disposed in the inner cavity, and is configured to attract the valve stem to move towards the electromagnet.

In a possible design, the sealing member is a seal ring, and the peripheral wall of the mounting hole is provided with an annular groove for mounting the seal ring.

In a possible design, the sealing member is a spiral sealing strip, and the peripheral wall of the mounting hole is provided with a spiral groove for mounting the spiral sealing strip.

In a possible design, the sealing member is made of nitrile-butadiene rubber.

In a possible design, a cross-sectional shape of the sealing member is an arc shape protruding towards a center of the mounting hole.

In a possible design, the solenoid valve further includes a gasket, where the gasket is disposed at an end, away from the valve body, of the valve stem and seals a pipeline under the driving of the valve stem.

In a possible design, an end surface, opposite the valve body, of the gasket is a sealing surface, and the sealing surface is provided with a plurality of concentric abutting seal rings. In a possible design, three abutting seal rings are provided, and the three abutting seal rings are arranged at intervals from outside to inside in a radial direction of the sealing surface.

In a possible design, one of the plurality of abutting seal rings is disposed on a circumferential edge of the sealing surface, and a cross-sectional shape is a right triangle, where one right-angle side is flush with the sealing surface, and the other right-angle side is flush with the peripheral wall of the gasket.

In a possible design, among the plurality of abutting seal rings, cross-sectional shapes of the abutting seal rings disposed inside the circumferential edge of the sealing surface are set to arc shapes respectively.

In a possible design, the solenoid valve further includes a compression spring, where the compression spring is sleeved on an outer side of the valve stem, one end of the compression spring abuts against the gasket, and the other end abuts against the valve body.

In addition, an embodiment of the present application further provides a gas cooktop, including the solenoid valve described above, the solenoid valve being disposed in a gas pipeline of the gas cooktop.

With reference to the foregoing technical solutions, the beneficial effects of the present application are analyzed as follows:

The solenoid valve provided in the present application includes the valve body, the valve stem, and the electromagnet. The valve body includes the inner cavity and the mounting hole connecting the inner cavity to the external environment, and the sealing member is disposed on the peripheral wall of the mounting hole. The valve stem is disposed passing through the mounting hole and partially located in the inner cavity, and is in sealed connection to the mounting hole by the sealing member. The electromagnet is disposed in the inner cavity, and is configured to attract the valve stem to move towards the electromagnet.

During the use of the solenoid valve, the valve stem is in sealed connection to the mounting hole by the sealing member disposed on the peripheral wall of the mounting hole, to prevent external liquid, gas or some other impurities from entering the inner cavity of the valve body through a mounting clearance between the mounting hole and the valve stem, and has the advantages of a simple seal assembly mode and an adequate sealing effect.

In addition, an embodiment of the present application further provides a gas cooktop including the solenoid valve described above, the solenoid valve being disposed in a gas pipeline of the gas cooktop.

The gas cooktop can achieve all the beneficial effects of the solenoid valve. Details are not described herein again.

Other features and advantages of the embodiments of the present application are described in a subsequent specification, and are partially apparent from the specification, or are understood by implementing the embodiments of the present application. An objective and other advantages of the embodiments of the present application are achieved and obtained in structures that are specially pointed out in the specification and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall sectional view of a solenoid valve according to an embodiment of the present application;

FIG. 2 is a sectional view of a valve body in a solenoid valve according to an embodiment of the present application;

FIG. 3 is a partial enlarged view of I in FIG. 2; and FIG. 4 is a partial enlarged view of I in FIG. 1.

Reference numerals:

1 -valve body;

11-sealing member;

12-inner cavity;

13-mounting hole;

2-valve stem;

3-electromagnet;

4-gasket;

41 -abutting seal ring;

5-compression spring.

The accompanying drawings herein are incorporated into the specification and form a part of this specification, show embodiments that conform to the present application, and are used to describe the principle of the present application together with this specification.

DETAILED DESCRIPTION

In order to make the technical solutions of the present application more comprehensible, the embodiments of the present application are described in detail with reference to the accompanying drawings.

Apparently, the described embodiments are merely some but not all of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

The terms used in the embodiments of the present application are merely for the purpose of illustrating specific embodiments, and are not intended to limit the present application. The terms "a", "said", and "the" of singular forms used in the embodiments and the appended claims of the present application are also intended to include plural forms, unless otherwise specified in the context clearly. It should be understood that the term "and/or" in this specification is merely an association relationship for describing associated objects and represents that three types of relationships may exist. For example, A and/or B may represent the following three cases: Only A exists, both A and B exist, and only B exists. In addition, the character "/" in this specification generally indicates an "or" relationship between the associated objects.

It should be noted that orientation words such as "on", "under", "left", and "right" described by the embodiments of the present application are described from the perspective shown in the accompanying drawings, and should not be construed as a limitation to the embodiments of the present application. In addition, in the context, it is further understood that when referring to an element connected to another element, the element may not only be connected directly to another element, but also be indirectly connected to another element through an intermediate element.

According to the structure of a solenoid valve provided in the embodiments of the present application, the specific embodiments are described below.

FIG. 1 is an overall sectional view of a solenoid valve according to an embodiment of the present application. FIG. 2 is a sectional view of a valve body in a solenoid valve according to an embodiment of the present application. FIG. 3 is a partial enlarged view of I in FIG. 2. FIG. 4 is a partial enlarged view of I in FIG. 1.

As shown in FIG. 1 and FIG. 4, an embodiment of the present application provides a solenoid valve. The solenoid valve includes a valve body 1, a valve stem 2, and an electromagnet 3. The valve body 1 includes an inner cavity 12 and a mounting hole 13 connecting the inner cavity 12 to the external environment. A sealing member 11 is disposed on a peripheral wall of the mounting hole 13. The valve stem 2 is disposed passing through the mounting hole 13 and partially located in the inner cavity 12, and is in sealed connection to the mounting hole 13 by the sealing member 11. The electromagnet 3 is disposed in the inner cavity 12, and is configured to attract the valve stem 2 to move towards the electromagnet 3.

During the use of the solenoid valve, the valve stem 2 is in sealed connection to the mounting hole 13 by the sealing member 11 disposed on the peripheral wall of the mounting hole 13, to prevent external liquid, gas or some other impurities from entering the inner cavity 12 of the valve body 1 through a mounting clearance between the mounting hole 13 and the valve stem 2, and has the advantages of a simple seal assembly mode and an adequate sealing effect.

In an optional solution of this embodiment, the sealing member 11 is a seal ring, and the peripheral wall of the mounting hole 13 is provided with an annular groove for mounting the seal ring.

Specifically, as shown in FIG. 2 and FIG. 3, the sealing member 11 is disposed as a seal ring and is fixedly mounted on the peripheral wall of the mounting hole 13 by the annular groove, so that the sealing member 11 can fully seal the peripheral wall of the mounting hole 13 by 360° and can fully ensure the assembly effect of sealing the mounting hole 13 and the valve stem 2 by the sealing member 11.

It should be noted that during the mounting of the sealing member 11 and the valve body 1, the sealing member 11 may be first fixed and limited in an injection mold of the valve body 1 by a clamp before the injection molding of the valve body 1 is completed. The sealing member 11 is fixed and embedded in the annular groove of the peripheral wall of the mounting hole 13 after the injection molding of the valve body 1 is completed. The mounting method has the advantages of a firm mounting effect and a simple process.

In addition, this embodiment further provides another optional solution of the sealing member 11. The sealing member 11 is a spiral sealing strip, and the peripheral wall of the mounting hole 13 is provided with a spiral groove for mounting the spiral sealing strip.

The sealing member 11 is provided with the spiral sealing strip, and is fixed and mounted on the peripheral wall of the mounting hole 13 by the spiral groove, so that the sealing member 11 can also fully seal the peripheral wall of the mounting hole 13 by 360°, and the spiral sealing strip can further seal and abut against the mounting hole 13 and the valve stem 2 with a plurality of rings, so that the mounting stability of the valve stem 2 in the mounting hole 13 can further be improved. Certainly, a specific mounting manner of the spiral sealing strip and the mounting hole 13 may be the same as the foregoing mounting manner. The spiral sealing strip may be first fixed and limited in the injection mold of the valve body 1 by a clamp. After the injection molding of the valve body 1 is completed, the spiral sealing strip is fixed and embedded in the spiral groove of the peripheral wall of the mounting hole 13.

In an optional solution of this embodiment, the sealing member 11 is made of nitrile- butadiene rubber.

Compared with conventional rubber, the nitrile-butadiene rubber has excellent oil resistance, wear resistance, heat resistance, and air tightness, and has adequate endurance against mineral oils, liquid fuels, animal and vegetable oils and solvents. In addition, the temperature that the nitrile-butadiene rubber can withstand in long-time use can reach 120°C, so that the nitrile-butadiene rubber is the optimal material for the sealing member 11.

In an optional solution of this embodiment, a cross-sectional shape of the sealing member 11 is an arc shape protruding towards a center of the mounting hole.

Specifically, as shown in FIG. 3, a cross-sectional shape of the sealing member 11 is provided with the arc shape protruding towards the center of the mounting hole, so that it is easy to insert the valve stem 2 into the mounting hole 13. When the valve stem 2 is completely inserted into the mounting hole 13, the valve stem 2 squeezes the arc-shaped protruding part of the sealing member 11 to deform and fit and abut against the peripheral wall of the valve stem 2. When the valve stem 2 is sealed with the mounting hole 13, the sealing member 11 is prevented from excessively squeezing and abutting against the valve stem 2, and the valve stem 2 is prevented from moving properly along the mounting hole 13.

In an optional solution of this embodiment, the solenoid valve further includes a gasket 4. The gasket 4 is disposed at an end, away from the valve body 1 , of the valve stem 2 and can seal a pipeline under the driving of the valve stem 2. Specifically, as shown in FIG. 1 and FIG. 4, the material of the gasket 4 may be the nitrile- butadiene rubber described above. The shape of the gasket 4 may be cylindrical. The valve stem 2 drives the gasket 4 to move to seal the pipeline, thereby achieving the beneficial effects of a simple structure and convenient and fast opening and closing of the pipeline.

In an optional solution of this embodiment, an end surface, opposite the valve body 1, of the gasket 4 is a sealing surface, and the sealing surface is provided with a plurality of concentric abutting seal rings 41.

Specifically, as shown in FIG. 1 and FIG. 4, a plurality of concentric abutting seal rings 41 can divide the sealing surface of the gasket 4 into a plurality of concentric annular regions. When the gasket 4 abuts against and seals the pipeline, the abutting seal ring 41 first abuts against a sealing position of the pipeline, and the gasket 4 then further abuts against the sealing position of the pipeline, so that the sealing surface of the gasket 4 fits and abuts against the sealing position of the pipeline to implement full secondary seal.

In case particle impurities of the pipeline are attached on the sealing surface of the gasket 4, the abutting and sealing effects of the sealing surface and the pipeline are affected. However, the two adjacent abutting seal rings 41 can wrap the particle impurities attached on the sealing surface of the annular region, and the sealing effect of the region is ensured by the two adjacent abutting seal rings 41.

The abutting seal ring 41 can implement the secondary seal of the pipeline with the sealing surface, and improve the sealing effect of the gasket 4.

In an optional solution of this embodiment, three abutting seal rings 41 are provided, and the three abutting seal rings 41 are arranged at intervals from outside to inside in a radial direction of the sealing surface.

Specifically, as shown in FIG. 1 and FIG. 4, three abutting seal rings 41 are provided and can divide the sealing surface of the gasket 4 into three concentric annular regions. When the gasket 4 seals and abuts against the pipeline, the three abutting seal rings 41 abut against a sealing position of the pipeline for the primary seal, and the gasket 4 then further abuts against the sealing position of the pipeline, so that the three annular regions of the sealing surface fit and abut against the sealing position of the pipeline to implement full secondary seal.

If a quantity of the abutting seal rings 41 is excessively small, the primary seal between the abutting seal ring 41 and the sealing position of the pipeline tends to be inadequate. If the quantity of the abutting seal rings 41 is excessively large, the secondary seal between the sealing surface of the gasket 4 and the sealing position of the pipeline tends to be inadequate. Therefore, three abutting seal rings 41 are disposed.

In an optional solution of this embodiment, one of the plurality of abutting seal rings 41 is disposed on a circumferential edge of the sealing surface, and a cross-sectional shape is a right triangle, where one right-angle side is flush with the sealing surface, and the other right-angle side is flush with the peripheral wall of the gasket 4.

Specifically, as shown in FIG. 4, the abutting seal rings 41 disposed on the circumferential edge of the sealing surface are arranged in the form of a right triangle. One right-angle side is flush with the sealing surface, and the other right-angle side is flush with the peripheral wall of the gasket 4. Such a structure can form a flared structure between the abutting seal rings 41 and the sealing surface and can fully ensure the sealing of the abutting at a sealing position of the pipeline.

In an optional solution of this embodiment, among the plurality of abutting seal rings 41, cross-sectional shapes of the abutting seal rings 41 disposed inside the circumferential edge of the sealing surface are set to arc shapes respectively.

Specifically, as shown in FIG. 4, a cross-sectional shapes of the abutting seal rings 41 disposed inside the circumferential edge of the sealing surface are set to arc shapes. Therefore, when the abutting seal rings 41 abut against the sealing position of the pipeline, the arc-shaped protruding parts of the abutting seal rings 41 tend to deform when being squeezed, so as to facilitate better abutting between the abutting seal rings 41 and the sealing position of the pipeline and also make it convenient for the sealing surface of the gasket 4 to move towards the pipeline to abut against the sealing position of the pipeline. In an optional solution of this embodiment, the solenoid valve further includes a compression spring 5, the compression spring 5 is sleeved on an outer side of the valve stem 2, one end of the compression spring 5 abuts against the gasket 4, and the other end abuts against the valve body 1.

Specifically, as shown in FIG. 1, the compression spring 5 can provide an elastic force for the gasket 4 to move away from the valve body 1 , so that the gasket 4 tightly presses the sealing position of the pipeline under the action of the elastic force to seal a pipe. When the electromagnet 3 is electrified to generate a magnetic force, the valve stem 2 is attracted to drive the gasket 4 to move towards the valve body 1 and stop abutting against and sealing the pipe.

It should be noted that to prevent a part, located in the inner cavity 12 of the valve body 1 , of the valve stem 2 from falling off from the inner cavity 12 under the action of the compression spring 5, a corresponding blocking member may be disposed at an end portion, located in the inner cavity 12, of the valve stem 2.

Moreover, the foregoing compression spring 5 may also be disposed in the inner cavity 12. One end of the compression spring 5 is connected to the valve stem 2 and the other end is connected to the electromagnet 3. The foregoing function of making the gasket 4 compress the pipeline under the action of the elastic force can also be implemented.

Certainly, the compression spring 5 may be alternatively replaced with another elastic member such as a spring leaf, provided that the function of providing the valve stem 2 an elastic force is implemented.

In addition, an embodiments further provides a gas cooktop including the foregoing solenoid valve, the solenoid valve being disposed in a gas pipeline of the gas cooktop.

The gas cooktop includes the foregoing solenoid valve, and can achieve all the beneficial effects. Details are not described herein again.

The above descriptions are merely preferred embodiments of the present application, but are not intended to limit the present application. Any modification, equivalent replacement or improvement made within the spirit and principle of the present application shall fall within the protection scope of the present application.

It should be noted that features of dependent claims may be combined with each other in any manner and combined with the features of independent claims without departing from the concept of the present application.

Claims

CLAIMS What is claimed is:

1. A solenoid valve, characterized by comprising: a valve body (1), the valve body (1) comprising an inner cavity (12) and a mounting hole (13) communicating the inner cavity (12) with an external environment, and a sealing member (11) being disposed on a peripheral wall of the mounting hole (13); a valve stem (2), the valve stem (2) being disposed through the mounting hole (13) and partially located in the inner cavity (12), and being in sealed connection to the mounting hole (13) through the sealing member (11); and an electromagnet (3), disposed in the inner cavity (12), and configured to adsorb the valve stem (2) to move towards the electromagnet (3).

2. The solenoid valve according to claim 1, characterized in that, the sealing member (11) is a seal ring, and the peripheral wall of the mounting hole (13) is provided with an annular groove for mounting the seal ring.

3. The solenoid valve according to claim 1, characterized in that, the sealing member (11) is a spiral sealing strip, and the peripheral wall of the mounting hole (13) is provided with a spiral groove for mounting the spiral sealing strip.

4. The solenoid valve according to claim 2 or 3, characterized in that, the sealing member (11) is made of nitrile-butadiene rubber.

5 The solenoid valve according to claim 2 or 3, characterized in that, a cross-sectional shape of the sealing member (11) is a circular arc protruding towards a center of the mounting hole.

6. The solenoid valve according to claim 1, characterized in that, the solenoid valve further comprises a gasket (4); and the gasket (4) is disposed on an end of the valve stem (2) away from the valve body (1) and seals a pipeline under the driving of the valve stem (2).

7. The solenoid valve according to claim 6, characterized in that, an end surface of the gasket (4) departing from the valve body (1) is a sealing surface, and the sealing surface is provided with a plurality of concentric abutting seal rings (41).

8. The solenoid valve according to claim 7, characterized in that, three abutting seal 5 rings (41) are provided, and the three abutting seal rings (41) are arranged at intervals from outside-in along a radial direction of the sealing surface.

9. The solenoid valve according to claim 7, characterized in that, one of the plurality of abutting seal rings (41) is disposed on a circumferential edge of the sealing surface, and a cross-sectional shape is a right triangle, wherein a right-angle side is flush with the sealing surface and an other right-angle side is flush with the peripheral wall of the gasket (4).

10. The solenoid valve according to claim 9, characterized in that, among the plurality of abutting seal rings (41), cross-sectional shapes of the abutting seal rings (41) disposed inside the circumferential edge of the sealing surface are set as circular arcs respectively.

11. The solenoid valve according to claim 6, characterized in that, the solenoid valve further comprises a compression spring (5); and the compression spring (5) is sleeved on an outer side of the valve stem (2), an end of the compression spring (5) abuts against the gasket (4), and an other end abuts against the valve body (1).

12. A gas cooktop, characterized by comprising the solenoid valve according to any one of claims 1 to 11 , and the solenoid valve being disposed in a gas pipeline of the gas cooktop.