Solenoid valve

Abstract

The utility model relates to an electromagnetic valve which comprises a diaphragm assembly and a valve body. The valve body is provided with a valve cavity and a valve port part communicated with the valve cavity, and the diaphragm assembly is arranged in the valve cavity; the diaphragm assembly comprises a diaphragm, a pressing plate and a guiding part which are fixedly connected, the pressing plate is located on the side, away from the valve port part, of the diaphragm, the diaphragm assembly can slide in the axial direction of the valve cavity and drive the diaphragm to be close to or away from the valve port part, the diameter of the outer edge of the guiding part is smaller than the inner diameter of the valve cavity, and the guiding part is used for guiding sliding of the diaphragm assembly. In the valve opening and closing process, the guide part can guide sliding of the diaphragm assembly, the stability of the diaphragm assembly sliding in the axial direction is guaranteed, the situation that the valve opening capacity of the electromagnetic valve is affected due to diaphragm inclination is avoided, meanwhile, the diaphragm can be prevented from being damaged, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of valve equipment, and in particular to a solenoid valve. Background Art

[0002] Sliding solenoid valves can be used in the thermal management of new energy vehicles. There are mainly piston solenoid valves and diaphragm solenoid valves. Among them, in piston solenoid valves, due to the small gap between the piston and the valve body, it is easy to get stuck due to impurities. When the car encounters complex working conditions during driving, impurities will inevitably be generated. In diaphragm solenoid valves, the diaphragm is mostly made of PTFE (Polytetrafluoroethylene). If the diaphragm encounters impurities during the sliding process, it will avoid getting stuck by deforming. However, during the sliding process, the diaphragm may tilt, resulting in poor valve opening and diaphragm damage, thereby affecting the valve opening ability. Utility Model Content

[0003] The purpose of the present application is to provide a solenoid valve which ensures the stability of the diaphragm assembly sliding axially in the valve cavity during the process of opening and closing the valve, thereby avoiding the influence of the inclination of the diaphragm on the opening ability of the solenoid valve, and at the same time avoiding damage to the diaphragm and extending the service life.

[0004] In order to solve the above-mentioned technical problems, the present application provides a solenoid valve, including a diaphragm assembly and a valve body; the valve body is provided with a valve cavity and a valve mouth portion connected to the valve cavity, and the diaphragm assembly is arranged in the valve cavity; the diaphragm assembly includes a fixedly connected diaphragm, a pressure plate and a guide portion, the pressure plate is located on the side of the diaphragm away from the valve mouth portion, the diaphragm assembly can slide along the axial direction of the valve cavity, and drive the diaphragm to approach or move away from the valve mouth portion, the outer edge diameter of the guide portion is smaller than the inner diameter of the valve cavity, and is used to provide a guiding effect for the sliding of the diaphragm assembly.

[0005] Preferably, the diaphragm assembly also includes a fixing portion, which includes a fixing rod, a first fixing member and a second fixing member, one of the first fixing member and the second fixing member is fixed to or integrally formed with one end of the fixing rod, and the other is fixed to the other end of the fixing rod, and the diaphragm and the pressure plate are attached to and clamped between the first fixing member and the second fixing member.

[0006] Preferably, the first fixing member is located on a side of the pressure plate away from the diaphragm, and the first fixing member is provided with a first protrusion extending radially outward, the number of the first protrusions is at least three, and the first protrusions are arranged at intervals along the circumference of the first fixing member. The diameter of the circle where the end of each first protrusion is located is smaller than the inner diameter of the valve cavity and forms the guide portion.

[0007] Preferably, the edge of the pressure plate is provided with a second protrusion extending radially outward, the number of the second protrusions is at least three, the second protrusions are arranged at intervals along the circumference of the pressure plate, the diameter of the circle where the end of each second protrusion is located is smaller than the inner diameter of the valve cavity, and the guide portion is formed.

[0008] Preferably, the guide portion is a guide plate, and the guide plate is provided with a hollow hole or a hollow groove.

[0009] Preferably, the material of the guide plate is the same as that of the diaphragm, and the guide plate is attached to a side of the pressure plate away from the diaphragm.

[0010] Preferably, the guide portion includes a mounting plate and third protrusions, the number of the third protrusions is at least three, the third protrusions are arranged at intervals along the circumference of the guide plate, the diameter of the circle where the end of each third protrusion is located is smaller than the inner diameter of the valve cavity, and the guide portion is formed.

[0011] Preferably, the guide portion is a metal part.

[0012] Preferably, it further comprises a spring; the spring is arranged in the valve cavity, and the spring can act on the diaphragm assembly to make the diaphragm assembly slide toward one side of the valve mouth until the diaphragm cooperates with the valve mouth.

[0013] Preferably, the valve body includes a main body and an end cover, the main body is provided with a liquid inlet, a liquid outlet and a groove structure, the valve port is provided between the liquid inlet and the valve cavity, the liquid outlet is communicated with the valve cavity, the end cover is circumferentially sealed and fixed to the main body, and the end cover can be enclosed with the groove structure to form the valve cavity.

[0014] The solenoid valve provided in the present application is provided with a guide portion on the diaphragm assembly to provide a guide for the sliding of the diaphragm assembly when the diaphragm assembly slides axially during the process of opening and closing the valve, thereby avoiding the diaphragm of the diaphragm assembly from tilting during the process of opening or closing the valve and affecting the valve opening ability of the solenoid valve. At the same time, it can also avoid the problem of diaphragm damage caused by diaphragm tilt, thereby ensuring the service life of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the structure of the solenoid valve provided in an embodiment of the present application;

[0016] Figure 2 yes Figure 1 A cross-sectional view of

[0017] Figure 3 yes Figure 2 A cross-sectional view of the main body of the middle valve body;

[0018] Figure 4 yes Figure 2 A schematic structural diagram of an embodiment of a middle diaphragm assembly;

[0019] Figure 5 yes Figure 2 A schematic structural diagram of another embodiment of the middle diaphragm assembly;

[0020] Figure 6 yes Figure 5 A cross-sectional view of

[0021] Figure 7 yes Figure 5 A cross-sectional view of

[0022] Figure 8 yes Figure 5 Exploded diagram of

[0023] Fig. 9 yes Figure 2 A schematic structural diagram of another embodiment of the middle diaphragm assembly;

[0024] Fig.10 yes Fig. 9 Exploded diagram.

[0025] Attached Figure 1-Figure 10 In the figure, the reference numerals are described as follows:

[0026] 10 diaphragm assembly; 20 valve body, 201 valve cavity, 202 liquid inlet, 203 liquid outlet, 204 valve port portion, 205 body portion, 206 end cover, 207 groove structure, 208 sealing strip; 30 spring; 40 drive assembly;

[0027] 1 diaphragm, 11 balancing hole; 2 pressure plate, 21 second protrusion; 3 fixing part, 31 fixing rod, 32 first fixing piece, 33 second fixing piece, 34 fixing hole; 4 guide part, 41 guide plate, 42 mounting plate, 43 third protrusion. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] The present application embodiment provides a solenoid valve, such as Figure 1 and Figure 2As shown, the solenoid valve includes a valve body 20, a diaphragm assembly 10, a spring 30 and a drive assembly 40. The valve body 20 is provided with a valve cavity 201, a liquid inlet 202 and a liquid outlet 203, wherein the liquid inlet 202 and the liquid outlet 203 are respectively communicated with the valve cavity 201, and a valve port portion 204 is provided between the liquid inlet 202 and the valve cavity 201. The diaphragm assembly 10 and the spring 30 are both provided in the valve cavity 201, and the spring 30 can act on the diaphragm assembly 10. The diaphragm assembly 10 slides toward the side close to the valve mouth portion 204 until the diaphragm 1 of the diaphragm assembly 10 cooperates with the valve mouth portion 204. The driving assembly 40 can drive the diaphragm assembly 10 to slide toward the side away from the valve mouth portion 204 until the diaphragm 1 is separated from the valve mouth portion 204. It is not difficult to understand that when the diaphragm 1 is cooperated with the valve mouth portion 204, the solenoid valve is in a closed valve state, and when the diaphragm 1 is separated from the valve mouth portion 204, the solenoid valve is in an open valve state.

[0030] Among them, the driving component 40 includes an electromagnetic coil, and the electromagnetic valve also includes a pilot part. When the power is on, the pilot part is opened by the electromagnetic force of the coil, and then the diaphragm assembly 10 can slide to the side away from the valve mouth part 204 under the pressure on the liquid inlet 202 side. The driving component 40 can specifically adopt the driving components in the prior art, and in order to save space, it will not be repeated here.

[0031] like Figure 2 and Figure 3 As shown, the valve body 20 includes a main body 205 and an end cover 206, wherein the liquid inlet 202 and the liquid outlet 203 are both arranged on the main body 205, and the main body 205 is also provided with a groove structure 207, which is respectively connected with the liquid inlet 202 and the liquid outlet 203, and the valve port 204 is provided on one side of the liquid inlet 202 facing the groove structure 207, and the end cover 206 can be fixed to the main body 205 and block the open end of the groove structure 207, and the end cover 206 and the groove structure 207 can enclose the valve cavity 201, so that the installation operation of the diaphragm assembly 10 can be facilitated. In order to ensure the sealing of the valve cavity 201, a sealing strip 208 is also sandwiched between the end cover 206 and the main body 205 along the circumferential direction.

[0032] like Figure 4 , Figure 5 and Figure 8 As shown, the diaphragm assembly 10 includes the above-mentioned diaphragm 1, pressure plate 2 and fixing part 3, wherein the diaphragm 1 and pressure plate 2 are stacked, the surface of pressure plate 2 is in contact with the surface of one side of diaphragm 1 away from valve mouth 204, and is fixed by fixing part 3, the pressure plate 2 can provide support for diaphragm 1, and during the axial sliding of diaphragm 1 in valve cavity 201, the outer wall of diaphragm 1 is slidably matched with the inner wall of valve cavity 201, and the gap between the two is small, so as to ensure that diaphragm 1 can slide to the side away from valve mouth 204 under the pressure of liquid inlet 202.

[0033] Since the diaphragm assembly 10 is directly against the spring 30, and the outer wall of the diaphragm 1 is slidably matched with the inner wall of the valve cavity 201, the diaphragm 1 may tilt due to uneven force, obstruction of impurities, etc. during the axial sliding of the diaphragm assembly 10 in the valve cavity 201. The tilt of the diaphragm 1 will lead to problems such as poor valve opening and damage to the diaphragm 1.

[0034] like Figure 4 , Figure 5 and Figure 8 As shown, the diaphragm assembly 10 provided in this embodiment also includes a guide portion 4, which is fixedly arranged with the diaphragm 1, and the outer edge diameter of the guide portion 4 is smaller than the inner diameter of the valve cavity 201 (that is, the diameter of the inner wall of the valve cavity 201), and the guide portion 4 is used to provide a guiding effect on the sliding of the diaphragm assembly 10 in the valve cavity 204.

[0035] The outer edge diameter of the guide portion 4 is not larger than the outer diameter of the diaphragm 1, and the outer edge diameter of the guide portion 4 is smaller than the inner diameter of the valve cavity 201. Specifically, there is a small gap between the outer edge of the guide portion 4 and the inner wall of the valve cavity 201. During the axial sliding of the diaphragm assembly 10 in the valve cavity 201, while the outer peripheral wall of the diaphragm 1 slides with the inner wall of the valve cavity 201, the guide portion 4 also slides axially along the valve cavity 201. Since there is a small gap between the outer edge of the guide portion 4 and the inner wall of the valve cavity 201, the axial length of the sliding cooperation between the diaphragm assembly 10 as a whole and the inner wall of the valve cavity 201 can be increased, and the probability of tilting during the sliding process can be reduced, thereby ensuring the stability of the diaphragm assembly 10 during the sliding process, avoiding the problem of affecting the valve opening ability due to the tilt of the diaphragm 1, and at the same time avoiding damage to the diaphragm 1, thereby ensuring the service life of the diaphragm 1.

[0036] Specifically, there is no restriction on the size of the gap between the outer edge of the guide portion 4 and the inner wall of the valve cavity 201, and it can be set according to the specifications of the solenoid valve and parameters such as the axial spacing between the guide portion 4 and the diaphragm 1. For example, when the diameter of the valve cavity 201 is larger or the axial spacing between the guide portion 4 and the diaphragm 1 is larger, the gap can be set to be relatively larger; when the diameter of the valve cavity 201 is smaller or the axial spacing between the guide portion 4 and the diaphragm 1 is smaller, the gap can be set to be relatively smaller. Specifically, the setting of the guide portion 4 can realize the stable sliding of the diaphragm assembly 10 along the axial direction in the valve cavity 201.

[0037] In this embodiment, there is no limitation on the specific structure of the fixing portion 3. Figure 6As shown, the fixing part 3 includes a fixing rod 31, a first fixing member 32 and a second fixing member 33, wherein the first fixing member 32 and the second fixing member 33 are respectively arranged at both ends of the fixing rod 31, and the fixing rod 31 passes through the diaphragm 1 and the pressing plate 2 in sequence. In the installed state, the diaphragm 1 and the pressing plate 2 are clamped between the first fixing member 32 and the second fixing member 33 to keep the surface of the diaphragm 1 and the surface of the pressing plate 2 in contact. The first fixing member 32 is located on the side of the pressing plate 2 away from the diaphragm 1, and the second fixing member 33 is located on the side of the diaphragm 1 away from the pressing plate 2. In the installed state, the second fixing member 33 faces the side of the valve port 204, and the cross-sectional area of ​​the second fixing member 33 is smaller than the cross-sectional area of ​​the valve port 204. In the valve closed state, the second fixing member 33 is located in the valve port.

[0038] Specifically, the first fixing member 32 and the fixing rod 31 may be fixed by threaded connection, welding or riveting, or the first fixing member 32 and the fixing rod 31 may be directly set as an integrally formed structure. The fixing method between the second fixing member 33 and the fixing rod 31 may refer to the fixing method between the first fixing member 32 and the fixing rod 31, and the fixing methods of the two places may be the same or different, and at most one of the first fixing member 32 and the second fixing member 33 may be integrally formed with the fixing rod 31.

[0039] like Figure 6 and Figure 7 In the example shown, the first fixing member 32 is integrally formed with the fixing rod 31, and the second fixing member 33 is fixed to the fixing rod 31. Specifically, during the installation process, the fixing rod 31 passes through the pressing plate 2 and the diaphragm 1 in sequence and then passes through the fixing hole 34 of the second fixing member 33, and then is riveted and fixed to the second fixing member 33 at the end of the fixing rod 31 (such as Figure 6 as shown) or by machining to expand the hole (as shown Figure 7 As shown, the outer diameter of the end of the fixing rod 31 is increased and is larger than the space of the fixing hole 34 to prevent the fixing rod 31 from being separated from the second fixing member 33 .

[0040] In this embodiment, there is no limitation on the specific structure and material of the guide part 4 , and the guide part 4 can be integrated into the pressure plate 2 or the fixing part 3 , or the guide part 4 can be set as a separate structure and fixed relative to the diaphragm 1 through the fixing part 3 .

[0041] When the guide portion 4 is integrated into the fixing portion 3, the first fixing member 32 is provided with a first protrusion (not shown in the figure) extending radially outward, the number of the first protrusions is at least three, and the first protrusions are arranged at intervals along the circumference of the first fixing member 32, and the diameter of the circle where the end of each first protrusion (specifically the end on one side away from the first fixing member 32) is located is smaller than the inner diameter of the valve cavity 201, and the above-mentioned guide portion 4 is formed. In the process of the diaphragm assembly 10 sliding along the valve cavity 201, the end of each first protrusion cooperates with the inner wall of the valve cavity 201 with a small gap and slides along the axial direction of the valve cavity 201.

[0042] Specifically, the number of the first protrusions is not limited, and the first protrusions may be arranged at even intervals or at uneven intervals along the circumference of the first fixing member 32 .

[0043] like Figure 4 As shown, when the guide portion 4 is integrated into the pressure plate 2, the pressure plate 2 is provided with a second protrusion 21 extending radially outward, the number of the second protrusions 21 is at least three, and the second protrusions 21 are arranged at intervals along the circumference of the pressure plate 2, and the diameter of the circle where the end of each second protrusion 21 (specifically the end on one side away from the pressure plate 2) is located is smaller than the inner diameter of the valve cavity 201 and forms the above-mentioned guide portion 4. During the sliding process of the diaphragm assembly 10 along the valve cavity 201, the end of each second protrusion 21 cooperates with the inner wall of the valve cavity 201 with a small gap and slides along the axial direction of the valve cavity 201.

[0044] Specifically, the number of the second protrusions 21 is not limited, and the second protrusions 21 can be arranged at even intervals or uneven intervals along the circumference of the pressure plate 2 .

[0045] When the guide portion 4 is a separate structure, such as Figure 5-Figure 8 As shown, the guide portion 4 can be a guide plate 41, the outer diameter of the guide plate 41 is smaller than the inner diameter of the valve cavity 201, and a small gap is formed between the guide plate 41 and the inner wall of the valve cavity 201. The guide plate 41 is provided with a hollow hole or a hollow groove. Specifically, the number and position of the hollow holes and the hollow grooves are not limited, and the total hollow area must not be less than the area of ​​the balance hole 11 provided on the diaphragm 1 to ensure that the diaphragm assembly 10 can slide smoothly and ensure smooth switching of the solenoid valve.

[0046] The diaphragm 1 can be made of plastic sheets such as PTFE (Polytetrafluoroethylene) sheets and PFA (Polyfluoroalkoxy, soluble polytetrafluoroethylene) sheets. The material of the guide plate 41 is preferably the same as that of the diaphragm 1, that is, the guide plate 41 is a plastic plate such as a PTFE plate or a PFA plate, and the guide plate 41 is located on the side of the pressure plate 2 away from the diaphragm 1. At this time, the structure of the diaphragm assembly 10 is equivalent to being provided with two layers of diaphragms, one layer is used to cooperate with the valve mouth part 204 to achieve sealing, and the other layer is the guide plate 41 used to provide a guiding function to prevent the diaphragm assembly 10 from tilting during the sliding process.

[0047] When the material of the guide plate 41 is the same as that of the diaphragm 1 , the impurities can pass along the edge of the guide plate 41 . When the material of the guide plate 41 is a metal plate, the impurities can pass through the hollow holes or the hollow grooves of the guide plate 41 .

[0048] In addition, the guide plate 41 may be in the form of a disc structure continuously arranged along the circumferential direction or may be in the form of two or more relatively fixed fan-shaped structures, and no specific limitation is made herein.

[0049] When the guide portion 4 is a separate structure, it can also be as follows Fig. 9 and Fig.10 As shown, the guide portion 4 includes a mounting plate 42 and a third protrusion 43, wherein the mounting plate 42 is coaxial with the diaphragm 1 and relatively fixed by the fixing portion 3, specifically located on the side of the pressure plate 2 away from the diaphragm 1, and the number of the third protrusions 43 is at least three, each third protrusion 43 is arranged at intervals along the circumference of the mounting plate 42, and the diameter of the circle where the end of each third protrusion 43 (specifically the end on the side away from the mounting plate 42) is located is smaller than the inner diameter of the valve cavity 201 and forms the above-mentioned guide portion 4, and during the sliding process of the diaphragm assembly 10 along the valve cavity 201, the end of the third protrusion 43 cooperates with the inner wall of the valve cavity 201 with a small gap and slides along the axial direction of the valve cavity 201.

[0050] Specifically, there is no restriction on the diameter of the mounting plate 42, that is, there is no restriction on the length of the third protrusion 43. The mounting plate 42 can be set as a disk with a larger diameter. In this case, the length of the third protrusion 43 is smaller. The mounting plate 42 can also be set as a disk with a smaller diameter. In this case, the length of the third protrusion 43 is relatively long, similar to a rod-like structure, which can reduce the overall weight of the guide portion 4.

[0051] In addition, the mounting plate 42 and the third protrusions 43 may be integrally formed or fixed by welding, etc. Specifically, the number of the third protrusions 43 is not limited, and the third protrusions 43 may be evenly spaced or unevenly spaced along the circumference of the mounting plate 42, as long as the diaphragm assembly 10 can be restricted from tilting during the sliding process.

[0052] When the guide portion 4 is a separate structure and includes the mounting plate 42 and the third protrusion 43 , the guide portion 4 is a metal piece, which can not only play a guiding role but also ensure structural strength.

[0053] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A solenoid valve, characterized in that: It comprises a diaphragm assembly (10) and a valve body (20); The valve body (20) is provided with a valve cavity (201) and a valve port (204) communicating with the valve cavity (201), and the diaphragm assembly (10) is arranged in the valve cavity (201); The diaphragm assembly (10) comprises a fixedly connected diaphragm (1), a pressure plate (2) and a guide portion (4); the pressure plate (2) is located on a side of the diaphragm (1) away from the valve mouth portion (204); the diaphragm assembly (10) is capable of sliding along the axial direction of the valve cavity (201) and driving the diaphragm (1) to approach or move away from the valve mouth portion (204); the outer edge diameter of the guide portion (4) is smaller than the inner diameter of the valve cavity (201) and is used to provide a guiding effect for the sliding of the diaphragm assembly (10).

2. The solenoid valve according to claim 1, characterized in that: The diaphragm assembly (10) also includes a fixing portion (3), the fixing portion (3) includes a fixing rod (31), a first fixing member (32) and a second fixing member (33), one of the first fixing member (32) and the second fixing member (33) is fixed to or integrally formed with one end of the fixing rod (31), and the other is fixed to the other end of the fixing rod (31), and the diaphragm (1) and the pressure plate (2) are attached to and clamped between the first fixing member (32) and the second fixing member (33).

3. The solenoid valve according to claim 2, characterized in that: The first fixing member (32) is located on a side of the pressure plate (2) away from the diaphragm (1), and the first fixing member (32) is provided with a first protrusion extending radially outward, the number of the first protrusions is at least three, and the first protrusions are arranged at intervals along the circumference of the first fixing member (32). The diameter of the circle where the end of each first protrusion is located is smaller than the inner diameter of the valve cavity (201) and forms the guide portion (4).

4. The solenoid valve according to claim 1, characterized in that: The edge of the pressure plate (2) is provided with a second protrusion (21) extending radially outward, the number of the second protrusions (21) is at least three, and the second protrusions (21) are arranged at intervals along the circumference of the pressure plate (2). The diameter of the circle where the end of each second protrusion (21) lies is smaller than the inner diameter of the valve cavity (201), and forms the guide portion (4).

5. The solenoid valve according to claim 1, characterized in that: The guide portion (4) is a guide plate (41), and the guide plate (41) is provided with a hollow hole or a hollow groove.

6. The solenoid valve according to claim 5, characterized in that: The material of the guide plate (41) is the same as that of the diaphragm (1), and the guide plate (41) is attached to a side of the pressure plate (2) away from the diaphragm (1).

7. The solenoid valve according to claim 5, characterized in that: The guide portion (4) comprises a mounting plate (42) and a third protrusion (43), the number of the third protrusions (43) is at least three, each of the third protrusions (43) is arranged at intervals along the circumference of the guide plate (41), the diameter of the circle where the end of each of the third protrusions (43) is located is smaller than the inner diameter of the valve cavity (201), and the guide portion (4) is formed.

8. The solenoid valve according to claim 7, characterized in that: The guide part (4) is a metal part.

9. The solenoid valve according to any one of claims 1 to 8, characterized in that: Also includes a spring (30); The springs (30) are arranged in the valve cavity (201), and the springs (30) can act on the diaphragm assembly (10) to make the diaphragm assembly (10) slide toward one side of the valve mouth (204) until the diaphragm (1) cooperates with the valve mouth (204).

10. The solenoid valve according to claim 9, characterized in that: The valve body (20) comprises a main body (205) and an end cover (206); the main body (205) is provided with a liquid inlet (202), a liquid outlet (203) and a groove structure (207); the valve port (204) is provided between the liquid inlet (202) and the valve cavity (201); the liquid outlet (203) is communicated with the valve cavity (201); the end cover (206) is circumferentially sealed and fixed to the main body (205), and the end cover (206) can be enclosed with the groove structure (207) to form the valve cavity (201).

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