CN117307734A

CN117307734A - Electromagnetic valve

Info

Publication number: CN117307734A
Application number: CN202210726421.7A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2023-12-29

Abstract

One embodiment of the present invention provides a solenoid valve that uses a structure for opening and closing a main valve port as a diaphragm assembly, and opens or closes a main valve port by sliding the diaphragm assembly, which is advantageous for improving the flow rate of the solenoid valve.

Description

Electromagnetic valve

Technical Field

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

Background

In the thermal management system, an electromagnetic valve is adopted to control the flow of the refrigerant, and a diaphragm electromagnetic valve is a common electromagnetic valve. At present, the diaphragm electromagnetic valve realizes the opening and closing of the valve by means of the deformation of the diaphragm, and the electromagnetic valve is unfavorable for improving the flow of the electromagnetic valve due to the limited deformation of the diaphragm.

Disclosure of Invention

The invention aims to provide a solenoid valve, which is beneficial to improving the flow rate of the solenoid valve.

To solve the above technical problem, one embodiment of the present invention provides a solenoid valve, including a valve body member and a diaphragm assembly, the solenoid valve having a valve cavity, the valve cavity being located in the valve body member, the valve body member having a main valve port, the valve cavity being capable of communicating with the main valve port; the diaphragm assembly is positioned in the valve cavity, and the diaphragm assembly can slide relative to the valve body component along the axial direction of the valve cavity so as to close or open the main valve port.

The electromagnetic valve provided by the embodiment of the invention utilizes the diaphragm assembly to open and close the main valve port, and realizes the opening or closing of the main valve port through the sliding of the diaphragm assembly, so that the flow rate of the electromagnetic valve is improved compared with the electromagnetic valve with the diaphragm deforming opening and closing valve port.

Drawings

FIG. 1 is a schematic diagram of a solenoid valve according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the solenoid valve of FIG. 1 in a first position;

FIG. 3 is a schematic illustration of the diaphragm assembly of the solenoid valve of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the diaphragm assembly of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the solenoid valve of FIG. 1 in a second position;

FIG. 6 is a schematic cross-sectional view of the solenoid valve of FIG. 1 in a third position;

fig. 7 is a schematic cross-sectional view of a valve seat body of the solenoid valve of fig. 1.

Reference numerals illustrate:

valve body member 10, valve seat 11, inlet chamber 111, outlet chamber 112, main valve port 113, installation chamber portion 114, first chamber portion 1141, second chamber portion 1142, stepped surface portion 1143, main valve port portion 115;

the valve comprises a valve cover body 12, a first cover body 12A, a second cover body 12B, a pilot valve cavity 121, a pilot valve port 122, a valve cavity 13, a first channel 141, a second channel 142, a third channel 143, a transition cavity 144 and a fourth channel 145;

the diaphragm assembly 20, the diaphragm 21, the through hole 211, the supporting plate 22, the pressing plate 23, the fixing rod 24, the head 241, the limiting face 2411, the rod 242 and the hole 2421;

a driving member 31, a pilot spool 32;

and an elastic member 40.

Detailed Description

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of an electromagnetic valve according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of the solenoid valve of FIG. 1 in a first position.

In this embodiment, the solenoid valve includes a valve body member 10 and a diaphragm assembly 20, the valve body member 10 has an inlet chamber 111, a valve chamber 13, a main valve port 113, and an outlet chamber 112, wherein the inlet chamber 111 communicates with the valve chamber 13, the valve chamber 13 can communicate with the outlet chamber 112 through the main valve port 113, and when fluid flows from the inlet chamber 111 into the valve chamber 13, the fluid can flow to the outlet chamber 112 through the main valve port 113.

Wherein, the diaphragm assembly 20 is located in the valve cavity 13 and can slide along the axial direction of the valve cavity 13 relative to the valve body part 10 to close or open the main valve port 113, that is, when the diaphragm assembly 20 closes the main valve port 113, the passage between the inlet cavity 111 and the outlet cavity 112 is blocked, fluid cannot flow between the two, when the diaphragm assembly 20 opens the main valve port 113, the passage between the inlet cavity 111 and the outlet cavity 112 is communicated, and fluid can flow between the two. The dash-dot line in fig. 2 illustrates the axial direction of the valve chamber 13.

The electromagnetic valve realizes the opening or closing of the main valve port 113 through the sliding of the diaphragm assembly 20, the diaphragm assembly 20 opens and closes the main valve port 113 through the sliding, compared with a diaphragm valve which simply relies on deformation to open and close the main valve port 113, the electromagnetic valve avoids the problem of current limitation caused by limited deformation, the distance between the diaphragm assembly 20 and the main valve port 113 is increased, the flow resistance is effectively reduced, the flow of the electromagnetic valve is improved, and the maximum flow of the electromagnetic valve can be ensured to reach the design requirement of application.

Referring to fig. 3 and 4 together, fig. 3 and 4 show a schematic structural view and a schematic sectional view of the diaphragm assembly 20, respectively.

In this embodiment, the membrane assembly 20 includes a membrane 21, a support plate 22 and a pressure plate 23, the membrane 21 is located between the support plate 22 and the pressure plate 23, the support plate 22 and the pressure plate 23 are fixedly connected with the membrane 21, the support plate 22 is located below the membrane 21, and the pressure plate 23 is located above the membrane 21, i.e. the support plate 22 is close to the main valve port 113 relative to the pressure plate 23.

Wherein the valve body member 10 has a main valve opening portion 115, and the diaphragm assembly 20 is such that the diaphragm 21 contacts the main valve opening portion 115 in a state where the main valve opening 113 is closed, that is, the radial dimension of the support plate 22 is smaller than the radial dimension of the diaphragm 21, and the support plate 22 only plays a role of supporting the diaphragm 21, as shown in fig. 2.

The membrane 21 may be made of a plastic material, such as PTFE (Poly tetra fluoroethylene ) or PFA (perfluoralkony, a small amount of a copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene/soluble polytetrafluoroethylene), which has good wear resistance and sealing properties. The pallet 22 may be made of a material having a certain strength.

Specifically, the radial dimension of the pressing plate 23 may be greater than the radial dimension of the supporting plate 22, so as to avoid the problem that the diaphragm 21 is deformed greatly due to the overlarge impact of the fluid on the diaphragm 21 in the working process, and ensure that the diaphragm 21 can effectively abut against the main valve 113 in the sliding process.

In a specific scheme, the membrane 21, the supporting plate 22 and the pressing plate 23 can be fixed together through a fixing rod 24, the fixing rod 24 comprises a head 241 and a rod 242, and a limiting face 2411 facing the pressing plate 23 is arranged at the joint of the head 241 and the rod 242; the rod portion 242 of the fixing rod 24 is fixedly connected with the pressing plate 23, the diaphragm 21 and the supporting plate 22, and the rod portion 242 penetrates through the pressing plate 23, the diaphragm 21 and the supporting plate 22 to fix the diaphragm 21, the diaphragm 21 and the supporting plate 22, the limiting face portion 2411 of the fixing rod 24 is abutted against the pressing plate 23, and the rod portion 242 is in interference fit with the supporting plate 22, so that the relative positions of the diaphragm 21, the supporting plate 22 and the pressing plate 23 in the axial direction can be limited, and adverse effects on opening and closing of the main valve port 113 caused by mutual displacement of the diaphragm 21, the supporting plate 22 and the pressing plate 23 are avoided. Obviously, mounting holes are provided on the diaphragm 21, the support plate 22 and the pressing plate 23, which are engaged with the rod portions 242.

In practice, the hole 2421 may be provided at the end of the stem 242 of the fixing rod 24, that is, the end far from the head 241, and the hole 2421 at the end of the stem 242 of the reamer may be enlarged after the fixing rod 24 passes through the mounting holes of the pressing plate 23, the diaphragm 21 and the supporting plate 22, so as to secure the fixing effect between the stem 242 and the supporting plate 22.

In this embodiment, the solenoid valve is a pilot type solenoid valve, the sliding power of the diaphragm assembly 20 is derived from the pressure difference force at the two ends of the diaphragm assembly 20, and the pressure difference force is formed by the action of the pilot valve portion. In other embodiments, the solenoid valve may be a direct-acting solenoid valve, that is, the driving force generated by the driving structure directly drives the diaphragm assembly 20 to act, and the arrangement of the driving structure and the transmission structure between the diaphragm assembly 20 may refer to the existing design, which is not described herein.

The following describes the structure of the pilot-operated solenoid valve in detail, please refer to fig. 2, and understand with reference to fig. 5 to 7, wherein fig. 5 and 6 show schematic cross-sectional views of the solenoid valve in the second position and the third position, respectively, and fig. 7 shows schematic cross-sectional views of the valve seat body.

In this embodiment, the solenoid valve further includes a driving component 31 and a pilot valve portion, where the pilot valve portion includes a pilot valve port 122 and a pilot valve core 32, the valve cavity 13 of the valve body component can be communicated with the outlet cavity 112 through the pilot valve port 122, the driving component 31 is used to drive the pilot valve core 32 to act to open or close the pilot valve port 122, and the diaphragm assembly 20 moves along the axial direction of the valve cavity 13 under the action of the pressure difference force between the valve cavity 13 and the outlet cavity 112.

Specifically, after the pilot valve port 122 is opened, fluid flowing from the inlet chamber 111 may flow through the valve chamber 13 and the pilot valve port 122 to the outlet chamber 112, so that the pressure below the diaphragm assembly 20 (the area where the outlet chamber 112 is located) is greater than the pressure above the diaphragm assembly (the area where the valve chamber 13 is located), and under the action of the pressure difference, the diaphragm assembly 20 is lifted up, so that the diaphragm assembly 20 moves in a direction away from the main valve port 113 to open the main valve port 113, and at this time, the fluid flowing into the valve chamber 13 through the inlet chamber 111 may directly flow from the main valve port 113 to the outlet chamber 112.

In the present embodiment, the valve body member 10 includes a valve seat body 11 and a valve cover body 12; wherein, the inlet chamber 111, the outlet chamber 112 and the main valve 113 are all formed on the valve seat 11, and referring to fig. 2 and 7, the valve seat 11 further includes a mounting chamber 114, a main valve port 113 is formed at a communication position between the mounting chamber 114 and the outlet chamber 112, at least a portion of the valve cover 12 is located in the mounting chamber 114, and a lower end surface of the valve cover 12 and a portion of a wall surface of the mounting chamber 114 form at least a portion of the valve cavity 13.

Specifically, an elastic member 40 is further disposed between the valve cover body 12 and the diaphragm assembly 20, and two ends of the elastic member 40 respectively abut against the valve cover body 12 and the diaphragm assembly 20, so that the diaphragm assembly 20 is conveniently reset under the action of the elastic member 40 to close the main valve port 113. The elastic member 40 may be a spring, and one end of the elastic member may be sleeved on the head portion 241 of the fixing rod 24 of the diaphragm assembly 20 to limit the spring. A limiting groove may be provided at one end, i.e., the bottom end, of the valve cover body 12 facing the main valve port 113, so as to limit the spring.

The valve cover body 12 includes a pilot valve chamber 121 and a pilot valve port 122, and the pilot valve spool 32 is movable in an axial direction of the pilot valve chamber 121 to open or close the pilot valve port 122 by the drive of the drive member 31.

In particular, for easy processing and assembly, the valve cover 12 includes a first cover 12A and a second cover 12B that are separately disposed, specifically, the first cover 12A and the valve seat 11 cooperate to form the valve cavity 13, the second cover 12B and the first cover 12A cooperate to form the pilot valve cavity 121, the pilot valve port 122 is formed in the first cover 12A, and the driving component 31 is specifically mounted to the second cover 12B. The specific structure of the driving component 31 can refer to the structure of the existing electromagnetic valve, for example, a structure that a static iron core and a movable iron core are matched, and the static iron core generates magnetism to attract the movable iron core to drive the pilot valve core 32 to act by electrifying, and other driving structures can be adopted.

A passage is provided in the valve body member 10, and the pilot valve chamber 121 communicates with the outlet chamber 112 through the passage.

As will be appreciated in connection with fig. 2, 5 and 6, the black arrows in the figures illustrate the direction of fluid flow. In this embodiment, the channels specifically include a first channel 141, a second channel 142, a third channel 143, a transition chamber 144, and a fourth channel 145; as shown in fig. 5, the first passage 141 communicates with the valve chamber 13 and the pilot valve chamber 121, the first passage 141 is specifically formed in the first cover 12A, as shown in fig. 6, the second passage 142 communicates with the pilot valve port 122 and the third passage 143, the third passage 143 communicates with the second passage 142 and the transition chamber 144, and the fourth passage 145 communicates with the transition chamber 144 and the outlet chamber 112; the second channel 142 and the third channel 143 are also provided on the first cover 12A, and the fourth channel 145 is provided on the valve seat 11.

Wherein a transition chamber 144 is formed between the cover body one 12A and the valve seat body 11. Referring to fig. 7 specifically, the mounting cavity 114 of the valve seat 11 includes a first cavity 1141 and a second cavity 1142, where the first cavity 1141 is located above the second cavity 1142 and has a radial dimension larger than that of the second cavity 1142, so that an upward stepped surface 1143 is formed at the joint between the two cavities, and accordingly, the first cover 12A includes a small diameter portion in sealing engagement with the second cavity 1142 and a large diameter portion in sealing engagement with the first cavity 1141, and after the first cover 12A and the valve seat 11 are assembled, the stepped surface 1143, a portion of the cavity wall of the first cavity 1141, and a portion of the outer wall surface of the first cover 12A enclose to form at least a portion of the transition cavity 144. This arrangement provides a flow path structure that facilitates establishing communication between the outlet chamber 112 and the third passage 143.

When the passage of the valve body member 10 is configured as described above, the driving member 31 drives the pilot valve element 32 to open the pilot valve port 122, and then the fluid flow path is as follows: inlet chamber 111 → valve chamber 13 → first passage 141 → pilot valve chamber 121 → pilot valve port 122 → second passage 142 → third passage 143 → transition chamber 144 → fourth passage 145 → outlet chamber 112.

The arrangement of the channels is not limited to the above, and in other embodiments, the arrangement of the channels may be changed adaptively according to the requirements of the structure, etc.

In a specific embodiment, the peripheral wall of the diaphragm 21 of the diaphragm assembly 20 is in sliding sealing fit with the wall surface of the cavity forming the valve cavity 13, as shown in fig. 2, and in this case, in order to communicate the valve cavity 13 with the inlet cavity 111, a through hole 211 may be provided in the diaphragm 21 of the diaphragm assembly 20. In fig. 3 and 4, two through holes 211 are provided on the membrane 21, and the number and arrangement of the through holes 211 can be determined according to the need in actual arrangement.

Of course, in other embodiments, the outer peripheral wall of the diaphragm 21 may be spaced apart from the wall surface forming the valve chamber 13 by a predetermined distance, so that a passage is formed between the outer peripheral wall of the diaphragm 21 and the wall surface forming the valve chamber 13, through which the inlet chamber 111 communicates with the valve chamber 13.

The electromagnetic valve provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. A solenoid valve comprising a valve body member and a diaphragm assembly, the solenoid valve having a valve cavity within the valve body member, the valve body member having a main valve port, the valve cavity being communicable with the main valve port; the diaphragm assembly is positioned in the valve cavity, and the diaphragm assembly can slide relative to the valve body component along the axial direction of the valve cavity so as to close or open the main valve port.

2. The solenoid valve of claim 1 wherein said valve body member comprises a valve seat body and a valve cover body; the valve seat body is provided with an inlet cavity, an outlet cavity and a mounting cavity part, the valve cover body is fixedly connected with the valve seat body, at least part of the valve cover body is positioned at the mounting cavity part, and the lower end surface of the valve cover body and part of the wall surface of the mounting cavity part form part of the valve cavity.

3. The electromagnetic valve according to claim 2, further comprising a drive member and a pilot valve portion including a pilot valve port and a pilot spool, the valve chamber being communicable with the outlet chamber through the pilot valve port; the driving component is used for driving the pilot valve core to act so as to open or close the pilot valve port.

4. A solenoid valve according to claim 3 wherein said solenoid valve has at least one of a first operating condition and a second operating condition;

in the first working state, the driving part drives the pilot valve core to act so as to close the pilot valve port, and the diaphragm assembly can slide along the axial direction of the valve cavity so as to close the main valve port;

in the second working state, the driving part drives the pilot valve core to act so as to open the pilot valve port, and the diaphragm assembly can slide along the axial direction of the valve cavity so as to open the main valve port.

5. The solenoid valve of any one of claims 2-4 wherein said diaphragm assembly includes a diaphragm, a carrier and a platen, said diaphragm being positioned between said carrier and said platen, said carrier and said platen being fixedly connected to said diaphragm; the valve body member has a main valve opening portion, and the diaphragm is in contact with the main valve opening portion in a state where the diaphragm assembly closes the main valve port.

6. The solenoid valve of claim 5 wherein said diaphragm assembly includes a fixed rod including a head portion and a stem portion, said head portion having a limit face portion facing said pressure plate; the rod part is fixedly connected with the pressing plate, the diaphragm and the supporting plate, the limiting face part is abutted to the pressing plate, and the rod part is in interference fit with the supporting plate.

7. The solenoid valve of claim 6 wherein said diaphragm has an outer peripheral wall sealingly connected to a wall defining said valve chamber, said diaphragm assembly having a through bore communicating said valve chamber with said inlet chamber of said valve body member; or, the peripheral wall of the diaphragm is spaced from the wall surface forming the valve cavity by a preset distance.

8. The solenoid valve of claim 7 further comprising an elastic member having opposite ends respectively abutting a portion of the cavity wall defining the valve cavity and the diaphragm assembly.

9. The solenoid valve of claim 8 wherein said valve body member has a pilot valve chamber, said valve body member having a passage communicating said pilot valve chamber with an outlet chamber of said valve body member, said passage including a first passage, a second passage, a third passage, a transition chamber, and a fourth passage; the first passage is communicated with the valve cavity and the pilot valve cavity, the second passage is communicated with the pilot valve port and the third passage, the third passage is communicated with the second passage and the transition cavity, and the fourth passage is communicated with the transition cavity and the outlet cavity.

10. The electromagnetic valve according to claim 9, wherein a part of the peripheral wall of the valve cover body and a part of the wall surface of the installation cavity portion form at least a part of the transition cavity; the first channel, the second channel and the third channel are all positioned on the valve cover body, and the fourth channel is positioned on the valve seat body.