CN114738495B

CN114738495B - Electromagnetic valve

Info

Publication number: CN114738495B
Application number: CN202110026492.1A
Authority: CN
Inventors: 俞舟; 马彦婷; 林元阳
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2023-05-16
Anticipated expiration: 2041-01-08
Also published as: CN114738495A

Abstract

The present invention provides a solenoid valve comprising: the valve seat is provided with an inlet, an outlet and a valve cavity communicated with the inlet and the outlet; the core iron is movably arranged in the valve cavity, and a riveting cavity is arranged in the core iron; the steel ball is movably arranged in the riveting cavity along the axial direction of the valve seat. By the technical scheme provided by the invention, the technical problem of small valve pressure difference of the electromagnetic valve in the prior art can be solved.

Description

Electromagnetic valve

Technical Field

The invention relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve.

Background

Currently, solenoid valves in the prior art generally include a valve seat, a core iron member, an inlet nipple, and an outlet nipple, an inlet, an outlet, and a valve chamber in the valve seat that communicates with both the inlet and the outlet, the core iron member being movably disposed in the valve chamber, the inlet nipple being disposed at the inlet, and the outlet nipple being disposed at the outlet. Typically, the core iron component includes a core iron and a steel ball.

However, the solenoid valve of the prior art has a small valve pressure difference, which is disadvantageous in lowering the minimum operating voltage.

Disclosure of Invention

The invention mainly aims to provide a solenoid valve to solve the technical problem that the valve pressure difference of the solenoid valve in the prior art is small.

In order to achieve the above object, according to one aspect of the present invention, there is provided a solenoid valve comprising: the valve seat is provided with an inlet, an outlet and a valve cavity communicated with the inlet and the outlet; the core iron is movably arranged in the valve cavity, and a riveting cavity is arranged in the core iron; the steel ball is movably arranged in the riveting cavity along the axial direction of the valve seat.

Further, the steel ball is provided with a first abutting position and a second abutting position which are abutted with the riveting cavity, and the height difference between the first abutting position and the second abutting position is h, wherein h is more than or equal to 0.3mm and less than or equal to 0.5mm.

Further, the riveting cavity is a conical cavity.

Further, the core iron is also provided with a balance hole, the balance hole extends along the radial direction of the valve seat, and the balance hole is communicated with the riveting cavity.

Further, the solenoid valve further includes: the valve seat is arranged at the outlet of the valve seat, and a communication channel communicated with the valve cavity is arranged in the valve seat; the valve port seat is provided with a connecting end and a supporting end which are oppositely arranged, the supporting end is arranged in the valve cavity, the connecting end extends out of the valve seat, a first positioning step is arranged between the connecting end and the supporting end and is used for being in butt joint with an outlet of the valve seat for positioning.

Further, the first positioning step comprises a first positioning surface and a second positioning surface which are connected with each other, the opening of the valve seat is provided with a positioning inner wall and a positioning side wall which are connected with each other, the first positioning surface is jointed and positioned with the positioning inner wall, at least part of the second positioning surface is jointed and positioned with the positioning side wall, and the second positioning surface protrudes out of the positioning side wall.

Further, the second positioning surface comprises a first matching annular surface and a second matching annular surface which are connected and arranged along the axial direction, the first matching annular surface is in interference fit with the positioning side wall, and the second matching annular surface is arranged at intervals with the positioning side wall, so that solder enters a gap between the second matching annular surface and the positioning side wall.

Further, the electromagnetic valve further comprises a first connecting pipe, the first connecting pipe is connected with the connecting end of the valve port seat, and the valve seat, the valve port seat and the first connecting pipe are connected through the same welding line.

Further, still be provided with the second location step on the valve port seat, the second location step sets up in the one side that first location step is close to the link, and the solenoid valve still includes: the first connecting pipe is matched with the second positioning step in a positioning way.

Further, the second positioning step further comprises a third positioning surface and a fourth positioning surface, the third positioning surface is in fit positioning with the end part of the first connecting pipe, and at least part of the fourth positioning surface is in interference fit with the inner wall of the first connecting pipe.

By applying the technical scheme of the invention, the steel ball is movably arranged in the riveting cavity along the axial direction of the valve seat, so that the steel ball can have a certain distance difference in the riveting cavity along the axial direction, thereby greatly improving the valve opening pressure difference, increasing the working reliability and reducing the lowest action voltage. Therefore, through the technical scheme provided by the embodiment, the technical problem that the valve pressure difference of the electromagnetic valve in the prior art is smaller can be solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and 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. In the drawings:

fig. 1 shows a schematic structural view of a solenoid valve provided according to an embodiment of the present invention;

fig. 2 shows an enlarged view at a in fig. 1;

fig. 3 shows a schematic structural view of a steel ball according to an embodiment of the present invention in a first abutment position;

fig. 4 shows a schematic structural view of a steel ball according to an embodiment of the present invention in a second abutment position;

fig. 5 shows a schematic view of the structure of the steel ball according to the embodiment of the invention in the height difference between the first abutting position and the second abutting position.

Wherein the above figures include the following reference numerals:

10. a valve seat; 11. an inlet; 12. an outlet; 13. a valve cavity; 20. a core iron; 21. a riveting cavity; 22. a balance hole; 30. a steel ball; 40. a valve port seat; 41. a communication passage; 42. a first positioning step; 421. a first positioning surface; 422. a second positioning surface; 4221. a first mating annulus; 4222. a second mating annulus; 43. a second positioning step; 431. a third positioning surface; 432. a fourth locating surface; 51. a first connection pipe; 52. a second connection pipe; 60. an attractor; 70. a return spring; 80. a sleeve; 90. and (5) magnetic ring separation.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 to 5, a first embodiment of the present invention provides a solenoid valve including a valve seat 10, a core iron 20, a steel ball 30, an attractor 60, a return spring 70, a sleeve 80, and a split magnetic ring 90, the valve seat 10 having an inlet 11, an outlet 12, and a valve chamber 13 communicating with both the inlet 11 and the outlet 12. The core iron 20 is movably arranged in the valve cavity 13, and a riveting cavity 21 is arranged in the core iron 20. The steel ball 30 is movably arranged in the riveting cavity 21 along the axial direction of the valve seat 10, and the steel ball 30 is riveted with the valve seat 10.

By adopting the electromagnetic valve provided by the embodiment, the steel ball 30 is movably arranged in the riveting cavity 21 along the axial direction of the valve seat 10, so that the steel ball 30 can have a certain distance difference in the riveting cavity 21 along the axial direction, the valve opening pressure difference can be greatly improved, the working reliability is increased, and the lowest action voltage is reduced. Therefore, through the technical scheme provided by the embodiment, the technical problem that the valve pressure difference of the electromagnetic valve in the prior art is smaller can be solved.

In the present embodiment, the steel ball 30 has a first abutting position and a second abutting position abutting against the caulking chamber 21, and a height difference between the first abutting position and the second abutting position is h,0.3 mm.ltoreq.h.ltoreq.0.5 mm. Through making the difference in height of first butt position and second butt position set up in above-mentioned distance range, can be convenient for promote the valve differential pressure better to the operational reliability is increased better, action voltage is reduced.

Specifically, the riveting cavity 21 in this embodiment is a conical cavity, so that the steel ball 30 can move smoothly in the riveting cavity 21, and meanwhile, the production and the manufacturing are facilitated.

In this embodiment, a balance hole 22 is further provided in the core iron 20, the balance hole 22 extends in the radial direction of the valve seat 10, and the balance hole 22 communicates with the rivet chamber 21. With such a configuration, the liquid in the caulking chamber 21 can be easily flowed into the balance hole 22. Specifically, a certain gap is formed between the steel ball 30 and the inner wall of the riveting chamber 21 in this embodiment, so that the liquid in the riveting chamber 21 can smoothly flow into the balance hole 22. Specifically, the clearance between the steel ball 30 and the inner wall of the caulking chamber 21 in this embodiment is not less than 0.1mm.

Specifically, the electromagnetic valve in this embodiment further includes a valve seat 40, where the valve seat 40 is disposed at the outlet 12 of the valve seat 10, and a communication channel 41 communicating with the valve cavity 13 is disposed in the valve seat 40. The valve port seat 40 has a connecting end and a supporting end which are oppositely arranged, the supporting end is arranged in the valve cavity 13, the connecting end extends out of the valve seat 10, a first positioning step 42 is arranged between the connecting end and the supporting end, and the first positioning step 42 is used for being abutted and positioned with the outlet 12 of the valve seat 10. By adopting the structure, the processing difficulty of the valve seat 10 can be conveniently reduced by arranging the valve seat 10 and the valve seat 40, and the processing efficiency is improved by only installing the valve seat 40 at the outlet 12 of the valve seat 10.

Specifically, the valve port seat 40 includes an inverted cone structure, and a flow channel is disposed in the valve port seat 40, and the flow channel is used for communicating with the valve cavity 13. The support end is located at the end of the inverted cone.

In this embodiment, the first positioning step 42 includes a first positioning surface 421 and a second positioning surface 422 that are connected to each other, the opening of the valve seat 10 has a positioning inner wall and a positioning side wall that are connected to each other, the first positioning surface 421 is attached to the positioning inner wall, at least part of the second positioning surface 422 is attached to the positioning side wall, and the second positioning surface 422 protrudes from the positioning side wall. With such a structural arrangement, the valve seat 10 and the valve port seat 40 can be positioned easily, and the stability of the arrangement can be improved. Meanwhile, the "the second positioning surface 422 protrudes from the positioning sidewall" means that the height of the second positioning surface 422 is higher than the height of the positioning sidewall, so that the second positioning surface 422 is exposed from the ground of the valve seat 10 ", which can also facilitate installation.

Specifically, the second positioning surface 422 in this embodiment includes a first mating ring surface 4221 and a second mating ring surface 4222 that are connected along the axial direction of the valve seat 10, the first mating ring surface 4221 is in interference fit with the positioning sidewall, and the second mating ring surface 4222 is spaced from the positioning sidewall, so that solder enters into a gap between the second mating ring surface 4222 and the positioning sidewall. By adopting the structure, the welding can be conveniently performed, and the stability of the welding is improved.

In this embodiment, the solenoid valve further includes a first connection pipe 51, the first connection pipe 51 is connected to the connection end of the valve seat 40, and the valve seat 10, the valve seat 40 and the first connection pipe 51 are connected by the same weld. By adopting the structure, the integrated welding can be performed, the welding efficiency is ensured, the stability of connection is improved, and the high-pressure requirement of a CO2 (carbon dioxide) system can be met.

Specifically, the valve port seat 40 in this embodiment is further provided with a second positioning step 43, the second positioning step 43 is disposed on a side of the first positioning step 42 near the connection end, the solenoid valve further includes a first connecting tube 51, and the first connecting tube 51 is in positioning fit with the second positioning step 43. By adopting such a structural arrangement, the first connecting pipe 51 can be conveniently connected and positioned, so that the setting stability of the first connecting pipe 51 is improved.

In this embodiment, the second positioning step 43 further includes a third positioning surface 431 and a fourth positioning surface 432, where the third positioning surface 431 is located in a fitting manner with the end portion of the first adapter tube 51, and at least part of the fourth positioning surface 432 is in interference fit with the inner wall of the first adapter tube 51. Specifically, the fourth locating surface 432 includes a third mating ring surface and a fourth mating ring surface that are disposed along the axial connection of the valve seat 10, the third mating ring surface is in interference fit with the inner wall of the first adapter tube 51, and the fourth mating ring surface is disposed at an interval with the inner wall of the first adapter tube 51, so that not only stability of assembly can be ensured, but also convenience in assembly can be ensured.

In this embodiment, the solenoid valve further comprises a second nipple 52, the second nipple 52 being connected to the inlet 11 of the valve seat 10. The first adapter tube 51 and the second adapter tube 52 are welded to the valve seat 10. The first connecting pipe 51 is matched with the valve seat 10 after being flared and welded, and the second connecting pipe 52 is matched with the valve seat 10 after being necked and welded.

In this embodiment, the valve seat 10 of the electromagnetic valve is composed of a valve seat 40, a valve seat 10, an inlet connection pipe (a second connection pipe 52) and an outlet connection pipe (a first connection pipe 51), wherein the valve seat 40 is in interference fit with part of the matching surface of the valve seat 10, and meanwhile, part of the matching surface is in clearance fit so as to facilitate solder circulation, and the valve seat 40, the valve seat 10 and the outlet connection pipe are integrally welded and share a welding seam structure. The valve port seat 40 is provided with a step surface (a first positioning step 42) which is in limit fit with the valve seat 10; the valve port is provided on the valve port seat 40. The valve port seat 40 is pressed with the valve seat 10 and then is exposed out of the bottom surface of the valve seat 10, and the distance delta is more than 0; the valve port seat 40 is in interference fit with the outlet adapter tube, and meanwhile, partial clearance fit is provided for facilitating solder circulation, and the contact end surface of the adapter tube and the valve port seat 40 is exposed out of the bottom surface of the valve seat 10, and the distance delta is more than 0 (shown in fig. 2). The inlet 11 pipe is matched with the valve seat 10 after necking and welded; the outlet 12 tube is flared and then mated with the valve port seat 40 and welded. The core iron 20 part consists of a core iron 20 and a steel ball 30, wherein the steel ball 30 is riveted with the core iron 20, and the steel ball 30 and the core iron 20 can flexibly move after being riveted, and the moving distance h=0.3-0.5.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the development pressure difference is improved, the action reliability is increased, and the minimum action voltage is reduced.

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 application 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 application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, 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 application; 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 merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solenoid valve, comprising:

a valve seat (10), the valve seat (10) having an inlet (11), an outlet (12), and a valve chamber (13) in communication with both the inlet (11) and the outlet (12);

a core iron (20) which is movably arranged in the valve cavity (13), wherein a riveting cavity (21) is arranged in the core iron (20);

the steel ball (30) is movably arranged in the riveting cavity (21) along the axial direction of the valve seat (10);

the solenoid valve further includes: a valve port seat (40) arranged at an outlet (12) of the valve seat (10), wherein a communication channel (41) communicated with the valve cavity (13) is arranged in the valve port seat (40); the valve port seat (40) is provided with a connecting end and a supporting end which are oppositely arranged, the supporting end is arranged in the valve cavity (13), the connecting end extends out of the valve seat (10), a first positioning step (42) is arranged between the connecting end and the supporting end, and the first positioning step (42) is used for being in butt joint and positioning with an outlet (12) of the valve seat (10);

the first positioning step (42) comprises a first positioning surface (421) and a second positioning surface (422) which are connected with each other, the opening of the valve seat (10) is provided with a positioning inner wall and a positioning side wall which are connected with each other, the first positioning surface (421) is attached to the positioning inner wall for positioning, at least part of the second positioning surface (422) is attached to the positioning side wall for positioning, and the second positioning surface (422) protrudes out of the positioning side wall for setting;

the second positioning surface (422) comprises a first matching ring surface (4221) and a second matching ring surface (4222) which are connected and arranged along the axial direction, the first matching ring surface (4221) is in interference fit with the positioning side wall, and the second matching ring surface (4222) is arranged at intervals with the positioning side wall so that solder enters a gap between the second matching ring surface (4222) and the positioning side wall;

the electromagnetic valve further comprises a first connecting pipe (51), the first connecting pipe (51) is connected with the connecting end of the valve port seat (40), and the valve seat (10), the valve port seat (40) and the first connecting pipe (51) are connected through the same welding line;

the valve seat is characterized in that the contact end surface of the first connecting pipe (51) and the valve port seat (40) is exposed out of the bottom surface of the valve seat (10), the outer side wall surface of the first connecting pipe (51) protrudes out of the second matching annular surface (4222) to be arranged, a feeding groove is formed by surrounding the end surface of the first connecting pipe (51), the second matching annular surface (4222) and the bottom surface of the valve seat (10), and a gap between the second matching annular surface (4222) and the positioning side wall is communicated with the feeding groove.

2. The solenoid valve according to claim 1, characterized in that the steel ball (30) has a first abutment position and a second abutment position in abutment with the riveting chamber (21), the difference in height between the first abutment position and the second abutment position being h,0.3mm ∈h ∈0.5mm.

3. A solenoid valve according to claim 1, characterised in that said riveting chamber (21) is a conical chamber.

4. The electromagnetic valve according to claim 1, characterized in that the core iron (20) is further provided with a balancing hole (22), the balancing hole (22) extending in the radial direction of the valve seat (10), the balancing hole (22) being in communication with the riveting chamber (21).

5. The solenoid valve according to claim 1, wherein the valve port seat (40) is further provided with a second positioning step (43), the second positioning step (43) being provided on a side of the first positioning step (42) near the connection end, the solenoid valve further comprising:

the first connecting pipe (51) is matched with the second positioning step (43) in a positioning way.

6. The solenoid valve according to claim 5, characterized in that said second positioning step (43) further comprises a third positioning surface (431) and a fourth positioning surface (432), said third positioning surface (431) being positioned in abutment with the end of said first nipple (51), at least part of said fourth positioning surface (432) being in interference fit with the inner wall of said first nipple (51).