Electromagnetic valve

Abstract

The electromagnetic valve comprises an electromagnetic part and a valve body part connected with the electromagnetic part, the valve body part comprises a valve seat, a valve sleeve arranged in the valve seat and a valve element assembly movably arranged in the valve sleeve, and the valve seat and the valve sleeve are provided with fluid channels which are communicated with each other. The electromagnetic part is connected with the valve element assembly so as to drive the valve element assembly to move in the valve sleeve. A rubber flange is arranged at the end of a valve rod in the valve element assembly and used for isolating the electromagnetic part from fluid in the valve seat so as to prevent impurities in the fluid from entering the electromagnetic part. Physical isolation of part of functional areas is achieved by adopting multiple rubber sealing modes, the influence of fluid media and the external environment on operation of the whole valve is avoided, the assembly consistency and operation reliability of the whole valve and the yield of the whole valve are improved, and the machining and manufacturing cost of part of parts is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of control valves, and more particularly, to a solenoid valve. Background Art

[0002] In addition to being widely used in industrial assembly, two-position three-way solenoid valves are widely used in automotive powertrain hydraulic control systems and air conditioning and heating systems. They are also increasingly used in new energy thermal management and fuel supply systems, and are gradually expanding to automotive chassis pneumatic control systems. Their main functions are reflected in flow, pressure control, automation, and safety protection.

[0003] The basic operating principle of a direct-acting, two-position, three-way solenoid valve is to utilize spring force to maintain sufficient sealing pressure on the valve core. Current is then used to control the magnitude, or even the presence, of the coil's excitation magnetic field. When the solenoid coil is deenergized, lacking an excitation magnetic field, the movable armature generates no electromagnetic force. The valve core, connected to the movable armature, remains in its initial position, closing one channel while leaving the remaining two channels connected. When the solenoid coil is energized, the movable and stationary armatures attract each other in the excitation magnetic field, generating electromagnetic force that controls the movement of the valve core. Once the valve core reaches a certain position, fluid flow channels are switched.

[0004] Existing direct-acting solenoid valves often employ a spool valve structure, where the valve core reciprocates within a valve sleeve to switch between three channels. Alternatively, the valve core and functional components, such as a movable armature, are fixed to each other before moving within a guide sleeve. This requires the valve core to reach a certain position before it can form a line or surface seal with the stationary component. Consequently, a certain clearance must be maintained between the two moving components. Firstly, the manufacturing precision of the components must be relatively high, and secondly, the assembly accuracy of some components must be increased. To prevent deflection and jamming between the moving components, the number and size of particles within them must be controlled within a certain range. Even if the valve operates effectively during initial operation, occasional jamming may occur during operation due to the accumulation of particles in the pipeline. This makes it difficult for spool valve direct-acting solenoid valves to achieve the desired reliability. This is especially true in three-way valves with a central supply pressure inlet (P) and a control outlet (A) and return outlet (T) at the flow channel interfaces on either side of the supply pressure inlet. The moving components must meet two seals to reciprocate, making jamming a common problem. Utility Model Content

[0005] In order to solve the above problems, it is necessary to provide a solenoid valve that can achieve the truncation and sealing of the two channels by pressing the two valve end faces against the rubber. At the same time, the rubber can cooperate with the surrounding stationary parts to fix the moving parts, preventing the moving parts from deflecting and particles from entering the area with smaller gaps and causing jamming.

[0006] According to one aspect of the present application, a solenoid valve is provided, comprising a solenoid portion and a valve body portion connected to the solenoid portion, the valve body portion comprising a valve seat, a valve sleeve disposed within the valve seat, and a valve core assembly movably disposed within the valve sleeve, the valve seat and the valve sleeve being provided with a fluid passage communicating with each other, the solenoid portion being connected to the valve core assembly to drive the valve core assembly to move within the valve sleeve, thereby changing the position of the valve core assembly relative to the fluid passage, thereby changing the flow state of the solenoid valve;

[0007] Wherein, a rubber flange is provided at the end of the valve stem in the valve core assembly, and the rubber flange is used to isolate the electromagnetic part and the fluid in the valve seat to prevent impurities in the fluid from entering the electromagnetic part, or the rubber flange seals the valve port.

[0008] As a further improvement of the present invention, the rubber flange is provided on the valve stem of the valve core assembly by vulcanization.

[0009] As a further improvement of the present invention, the valve core assembly includes a first valve core and a second valve core, the first valve core is connected to the electromagnetic part, and the second valve core is connected to the first valve core, wherein the valve stem of the first valve core is provided with an upper rubber flange, and the valve stem of the second valve core is provided with a lower rubber flange;

[0010] When the electromagnetic part is powered off and the electromagnetic valve is in a first flow state, the lower rubber flange seals the lower valve port of the valve sleeve, the upper rubber flange is away from the upper valve port of the valve sleeve, and the upper valve port is communicated with the second fluid channel on the valve seat;

[0011] When the electromagnetic part is energized and the electromagnetic valve is in the second flow state, the upper rubber flange seals the upper valve port of the valve sleeve, the lower rubber flange is away from the lower valve port of the valve sleeve, and the lower valve port is communicated with the first fluid channel on the valve seat.

[0012] As a further improvement of the present invention, one end of the valve stem of the first valve core is fixedly connected to the movable armature of the electromagnetic part, and the other end is fixedly connected to the valve stem of the second valve core.

[0013] As a further improvement of the present invention, one end of the valve stem of the first valve core is threadedly connected, welded or press-fitted to the movable armature of the electromagnetic part, and the other end is threadedly connected, welded or press-fitted to the valve stem of the second valve core.

[0014] As a further improvement of the present invention, the upper rubber flange is clamped by the magnetic static pole shoe of the electromagnetic part and the valve sleeve, and the lower rubber flange is clamped by the valve sleeve and the inner wall of the valve seat.

[0015] As a further improvement of the present invention, an upper protrusion is provided on the valve sleeve near the end of the upper rubber flange, and a lower protrusion is provided on the valve sleeve near the end of the lower rubber flange.

[0016] As a further improvement of the present invention, a sealing ring is provided between the magnetic conductive shell of the electromagnetic part and the wall of the valve seat hole.

[0017] As a further improvement of the present invention, a coil skeleton and a coil plastic shell are sequentially provided on the periphery of the coil assembly of the electromagnetic part.

[0018] As a further improvement of the present invention, the solenoid valve further comprises a reset assembly connected to the valve core assembly, the reset assembly being used to provide a retaining force for the valve core assembly to seal the valve port;

[0019] Or the reset component is used to reset the valve core component when it is not subjected to external force.

[0020] Compared with the prior art, the embodiments of the present invention achieve physical isolation of some functional areas by adopting a variety of rubber seals, thereby avoiding the influence of fluid media and external environment on the operation of the entire valve, improving the assembly consistency and operation reliability of the entire valve and the yield of the entire valve, and reducing the processing and manufacturing costs of some parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] These and / or other aspects and advantages of the present application will become more clear and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0022] Figure 1 This is a schematic structural diagram of the first flow state of the solenoid valve disclosed herein;

[0023] Figure 2 This is a schematic structural diagram of the solenoid valve in the second flow state of the present disclosure;

[0024] Figure 3 This is another structural schematic diagram of the solenoid valve disclosed herein;

[0025] Figure 4 This is a structural schematic diagram of the valve body part disclosed in the present invention;

[0026] Figure 5-1 This is another structural schematic diagram of the valve body part disclosed in the present invention;

[0027] Figure 5-2 This is another structural working state diagram of the valve body part disclosed in the present invention;

[0028] Figure 6a This is another installation diagram of the fifth sealing ring disclosed in the present invention;

[0029] Figure 6b This disclosure Figure 6a A partially enlarged schematic diagram. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] An embodiment of the present disclosure provides a solenoid valve, comprising a solenoid portion and a valve body portion connected to the solenoid portion. The valve body portion comprises a valve seat 8, a valve core assembly disposed within the valve seat 8, and a valve sleeve 1. The valve seat 8 and the valve sleeve 1 are provided with fluid passages communicating with each other. The solenoid portion is connected to the valve core assembly to drive the valve core assembly to move within the valve seat 8, thereby changing the position of the valve core assembly relative to the valve port, thereby changing the flow state of the solenoid valve.

[0032] In this embodiment, a rubber flange is provided at the end of the valve stem in the valve core assembly. The rubber flange is used to isolate the electromagnetic part and the fluid in the valve seat to prevent impurities in the fluid from entering the electromagnetic part.

[0033] The solenoid valve provided by the present invention is divided into an electromagnetic part and a hydraulic or pneumatic part, wherein the electromagnetic part can be completely isolated from the flow channel medium by the rubber flange and sealing ring of the valve core assembly, effectively preventing impurities such as particles in the fluid from entering the electromagnetic part with a relatively small gap, thereby improving the durability and reliability of the electromagnetic head.

[0034] Preferably, the rubber flange is provided on the valve stem of the valve core assembly by vulcanization.

[0035] Exemplarily, the valve core assembly includes a first valve core 5 and a second valve core 6, wherein the first valve core 5 is connected to the electromagnetic part, and the second valve core 6 is connected to the first valve core 5, wherein the valve stem of the first valve core 5 is provided with an upper rubber flange 502, and the valve stem of the second valve core 6 is provided with a lower rubber flange 602;

[0036] When the electromagnetic part is powered off and the electromagnetic valve is in the first flow state, the lower rubber flange 602 seals the lower valve port 105 of the valve sleeve 1, and the upper rubber flange 502 is away from the upper valve port of the valve sleeve 1, and the upper valve port is connected to the second fluid channel 812 on the valve seat 8;

[0037] When the electromagnetic part is energized and the electromagnetic valve is in the second flow state, the upper rubber flange 502 seals the upper valve port of the valve sleeve 1, the lower rubber flange 602 is away from the lower valve port of the valve sleeve 1, and the lower valve port is connected to the first fluid channel 811 on the valve seat 8.

[0038] Furthermore, the upper rubber flange 502 is clamped by the magnetically conductive static pole shoe 14 of the electromagnetic part and the valve sleeve 1 , and the lower rubber flange 602 is clamped by the valve sleeve 1 and the inner wall of the valve seat 8 .

[0039] Furthermore, an upper protrusion 103 is provided on the valve sleeve 1 near the end of the upper rubber flange 502 , and a lower protrusion 102 is provided on the valve sleeve 1 near the end of the lower rubber flange 102 .

[0040] The solenoid valve further comprises a reset assembly connected to the valve core assembly, the reset assembly being used to provide a retaining force for the valve core assembly to seal the valve port; or the reset assembly being used to reset the valve core assembly when it is not subject to external force.

[0041] Specifically, if Figure 1 As shown, a cross-section of the entire valve with a valve seat is shown, which is mainly divided into an electromagnetic part and a hydraulic or pneumatic part. The electromagnetic part includes an electromagnetic coil assembly 2, a guide sleeve 3, and a movable armature 4; the hydraulic or pneumatic part includes a valve sleeve 1, a first valve core 5, a second valve core 6 and a rubber flange 602 vulcanized on the valve stem 601, a return spring 7, a valve seat 8, a first sealing ring 9, a second sealing ring 10, a third sealing ring 11, and a fourth sealing ring 12; the connecting parts of the electromagnetic part and the hydraulic or pneumatic part are a magnetic static pole shoe 14 and a fastening bolt 13; the electromagnetic part plus the magnetic static pole shoe 14 and the third sealing ring 11 and the fourth sealing ring 12 constitute an electromagnetic head unit; the coil assembly 2 contains a coil winding 201, a magnetic yoke 202, a magnetic housing 203, an electrical plug 204 and a bracket limit block 205; the valve sleeve 1 is provided with a means for crimping or riveting The connecting portion 101 for the magnetic static pole shoe 14; the lower protrusion 102 and upper protrusion 103 for sealing after pressing the rubber flange; two volcanic protrusions serving as valve ports (upper valve port 104 and lower valve port 105); valve sleeve channel 1 111 communicating with the first fluid channel 811 of the valve seat 8; valve sleeve channel 2 112 communicating with the second fluid channel 812 of the valve seat 8; and valve sleeve channel 3 113 communicating between the two valve ports. The first valve core 5 includes a first valve stem 501 fixed to the movable armature 4, a sealing rubber flange 502 vulcanized on the first valve stem 501, and a throttle hole 511. The second valve core 6 includes a second valve stem 601 fixed to the first valve core 5, a sealing rubber flange 602 vulcanized on the second valve stem 601, and a valve core channel 613 communicating with the valve sleeve channel 3 113.

[0042] In this embodiment, the upper rubber flange 502 in the first valve core 5 is vulcanized on the first valve stem 501. Regardless of whether the valve stem is made of metal or other non-metallic materials, the vulcanization process can ensure that the rubber flange and the valve stem are tightly fixed together, achieving a very good sealing effect. The outermost ring of the upper rubber flange 502 in the first valve core 5 is clamped and sealed by the magnetic static pole shoe 14 and the upper protrusion 103 in the valve sleeve 1. At the same time, the sealing ring 10 cuts off the possibility of leakage between the valve seat 8 and the valve sleeve 1. The fluid in the internal flow channel of the entire valve will be completely retained on the side of the magnetic static pole shoe away from the movable armature (specifically, retained on the side of the upper rubber flange 502 of the first valve core 5 away from the magnetic static pole shoe). The channel fluid cannot contact the electromagnetic part or even the movable armature 4 in the magnetic field, thereby preventing particles in the fluid from entering the relatively precise and small-gap electromagnetic head unit. At the same time, it also achieves comprehensive isolation of substances such as water vapor in the fluid from the magnetic metal that is prone to rust and corrosion, greatly improving the durability of the entire valve and reducing the processing and manufacturing costs of many components.

[0043] In addition, during the installation of the first valve core 5 and the second valve core 6, once the valve core deviates axially during reciprocating motion, the upper rubber flange 502 and the lower rubber flange 602 will amplify this axial deviation, so it can be easily found whether the first valve stem 501 and the second valve stem 601 are assembled in the center; during the operation of the entire valve after assembly, even if the movable armature 4 and the guide sleeve 3 with the minimum gap are locally worn or even deflected, since the outer ring of the rubber flange has been clamped, the upper rubber flange 502 and the lower rubber flange 602 can also reduce the effect of hindering the deflection of the first valve core 5 and the second valve core 6, forcing the moving parts in the entire valve to reciprocate more stably, thereby effectively reducing the movement friction of the entire valve.

[0044] When implementing the solenoid valve of this embodiment, the valve core rubber flange can effectively ensure that the valve port and the rubber seal are smooth and uniform, prevent the valve core from being installed skewed and worn during operation, avoid the change in the valve port sealing pressure ratio caused by the deflection and deformation of the valve core, reduce the risk of sealing leakage, and then design a matching smaller spring force and electromagnetic force, thereby reducing the manufacturing cost of the entire valve.

[0045] It is necessary to explain that the shapes of the upper rubber flange 502 and the lower rubber flange 602 in the present disclosure include but are not limited to the styles and sizes shown in the drawings of the specification, and can be adjusted according to the size and performance requirements of the entire valve. For example, the flange part is not wavy and can also achieve basic functions, such as adding a dynamic sealing ring between the outer diameter of the first valve stem 501 and the inner hole wall of the magnetic static pole shoe to replace the entire vulcanized flange-shaped rubber, or even using a complex rubber shape to achieve a structure with multiple sealing functions. It can be split into multiple parts according to the functional points for use as an alternative.

[0046] Exemplarily, one end of the valve stem 501 of the first valve core 5 is threadedly connected to the movable armature 4 of the electromagnetic part, and the other end is threadedly connected to the valve stem 601 of the second valve core 6 .

[0047] In this embodiment, the movable armature 4 of the solenoid portion and the first valve stem 501 of the first valve core 5 can be press-fitted or welded together. Similarly, the first valve core 5 and the second valve stem 601 of the second valve core 6 can also be press-fitted or welded together. In this way, for applications requiring only flow switching, a two-position, three-way valve can be press-fitted or welded into place to easily ensure sufficient flow at both valve ports. If the two-position, three-way valve requires adjustable flow or even improved proportional linearity, the two connections can be modified to threaded connections. The axial position between the movable armature 4 and the first valve core 5 can be adjusted, as can the axial position between the second valve core 6 and the first valve core 5. This allows for adjustable throttling of the flow passage between the first valve core 5 and the upper valve port 104 of the valve sleeve 1, and similarly, the throttling of the flow passage between the second valve core 6 and the lower valve port 105 of the valve sleeve 1. This facilitates proportional flow control of the entire two-position, three-way valve, or a more appropriate flow rate, thereby achieving adjustable flow and even optimizing the linearity of the flow curve. In addition, the rubber flanges of the two valve cores are compressed and sealed and cannot rotate. At the same time, since the movable armature 4 moves axially back and forth in the electromagnetic field, the torque of the movable armature itself will be much smaller than the binding force of the threaded pair, ultimately ensuring that the relative axial positions between the movable armature 4, the first valve core 5 and the second valve core 6 will not loosen during long-term operation.

[0048] like Figure 2 The functional matching structure of the entire valve components shown can adjust the effective flow cross-sectional area of ​​the two valve ports by adjusting the relative positions of the movable armature 4, the first valve core 5 and the second valve core 6, which is beneficial to the optimization of the proportional adjustment of the flow curve of the entire valve; because the above-mentioned flow path flows through more partial areas, the equivalent throttling areas of multiple throttling channels can be adjusted according to the flow curve.

[0049] Exemplarily, a fifth sealing ring 15 is provided between the magnetically conductive housing 203 of the electromagnetic part and the hole wall of the valve seat 8 .

[0050] Furthermore, a coil skeleton 206 and a coil plastic shell 207 are sequentially provided on the periphery of the coil assembly 2 of the electromagnetic part.

[0051] like Figure 1 and Figure 2As shown, the magnetic conductive static pole shoe 14, which is a connector between the electromagnetic part and the hydraulic or pneumatic part, is respectively crimped or riveted to the magnetic conductive housing 203 in the coil assembly 2, and is also crimped or riveted to the valve sleeve 1. These two connections do not effectively prevent moisture from the external environment from entering the electromagnetic head unit, so the usual practice is to add a third sealing ring 11 and a fourth sealing ring 12 for effective sealing. However, the magnetic conductive housing 203 and the magnetic conductive static pole shoe are still easily exposed to the external environment, and their weather resistance requirements will greatly increase the processing and manufacturing costs of these two parts, and the connection process needs to avoid heating processes such as welding; In this embodiment, as Figure 3 As shown, a fifth sealing ring 15 is added between the magnetic shell 203 of the coil assembly 2 and the inner wall of the hole of the valve seat 8. However, the iron element of the magnetic metal is easy to rust, and the coil winding 201 in the coil assembly 2 needs to be insulated and voltage-resistant, so the coil assembly 2 often requires two injection molding processes to form the coil skeleton 206 and the coil plastic shell 207 respectively; the purpose of adding the fifth sealing ring 15 is to form an effective seal between the plastic shell 207 and the inner hole wall of the valve seat 8, thereby isolating the influence of harmful factors such as moisture in the external environment on the durability and other performance of the entire valve; in this embodiment, the valve seat inner hole wall has a greater impact, and the valve seat 8 is subject to the application environment and can even be regarded as a customer interface. In the presence of the fifth sealing ring 15, the third rubber ring 11 and the fourth rubber ring 12 can be reduced. After all, the water content in the plastic is not enough to cause the rusting process of the magnetic metal.

[0052] like Figure 3 The exposed metal area of ​​the entire valve shown can be physically isolated from the external environment by using the fifth sealing ring 15 and plastic coating processes to achieve the key rust and corrosion protection of the magnetic metal, thereby improving the weather resistance of the entire valve and reducing the rust and corrosion protection requirements and manufacturing costs of some components.

[0053] The working principle of the solenoid valve in the embodiment of the present disclosure is as follows:

[0054] like Figure 1 As shown, when the solenoid valve is in the first flow state, the fluid in the second fluid channel 812 in the valve seat 8 can communicate with the third fluid channel 813 in the valve seat 8 through the valve sleeve channel 2 112, the upper valve port 104, the valve sleeve channel 3 113, the valve core channel 613, etc. in the valve sleeve 1. At the same time, the first fluid channel 811 in the valve seat 8 is compressed and sealed by the first rubber ring 9, the rubber flange 602 of the second valve core, the lower valve port 105 in the valve sleeve 1, and the lower rubber flange 602 in the second valve core 6 to isolate the communication path. That is, the second fluid channel 812 is connected to the third fluid channel 813 and is sealed and isolated from the first fluid channel 811. Usually, in this state, when the solenoid head is not energized, the spring force provided by the return spring 7 maintains sufficient sealing pressure between the lower valve port 105 and the rubber on the second valve core 6 to achieve isolation of the first fluid channel 811.

[0055] like Figure 2 As shown, when the solenoid valve is in a flow state, the fluid in the first fluid channel 811 in the valve seat 8 can pass through the valve sleeve channel 111 in the valve sleeve 1, enter the valve sleeve channel 113 and the valve core channel 613 from the lower valve port 105, and finally communicate with the third fluid channel 813 in the valve seat 8. At the same time, the second fluid channel 812 in the valve seat 8 is compressed and sealed by the second sealing ring 10, the upper rubber flange 502 of the first valve core, the upper valve port 104 in the valve sleeve 1 and the upper rubber flange 502 in the first valve core 5 to isolate the communication path. In this way, the first fluid channel 811 is communicated with the third fluid channel 813 and is sealed with the second fluid channel 812. Isolation. Usually, in this state, the electromagnetic head needs to be energized, and electromagnetic force is generated under the mutual attraction between the movable armature 4 and the magnetic static pole shoe 14 of the excitation magnetic field. This electromagnetic force not only overcomes the elastic force of the reset spring 7 to realize the movement of the first valve core 5 and the second valve core 6 toward the direction of the principle electromagnetic coil assembly 2, but also can realize the upper rubber flange 501 of the first valve core 5 and the upper valve port 104 on the valve sleeve 1 to press and seal to cut off the flow path of the second fluid channel 812, and at the same time open the compression sealing structure between the lower rubber flange 602 of the second valve core 6 and the lower valve port 105 of the valve sleeve 1, thereby realizing the connection between the first fluid channel 811 and the third fluid channel 813.

[0056] like Figure 1 、 2 As shown in Figure 3, the valve seat can be regarded as the customer's matching interface, so the installation position of the return spring can be adjusted accordingly between the first valve core and the valve sleeve, or between the movable armature and the magnetic static pole shoe. It can be adjusted and optimized according to the actual situation and the space between the moving parts and the stationary parts inside the entire valve, with flexible and changeable matching methods.

[0057] In addition, in the embodiment of the present disclosure, the connection between multiple components can be achieved by pressing, riveting, threading or even welding, and even some components can be flexibly adjusted, which is beneficial to ensure that multiple rubber seals have sufficient deformation and sealing pressure ratio, and can easily achieve the internal leakage and external leakage requirements of the entire valve.

[0058] It should be noted that if Figure 4 As shown, the installation position of the reset spring 7 shown in the embodiment of the present disclosure includes but is not limited to the side of the second valve core 6 away from the first valve core 5, and can also be adjusted so that the reset spring 7 is arranged on the side of the first valve core 5 away from the movable armature or is arranged between the second valve core 4 and the valve seat. The structure of this case is that the spring is placed between the moving part and the stationary part. There are more areas in the entire valve space where the spring can be placed, which can be regarded as the same solution.

[0059] In addition, if Figure 5-1 and 5-2As shown, the electromagnetic force generated by the solenoid head in the embodiment of the present disclosure includes, but is not limited to, forcing the movable armature 4 to move away from the power plug 204. It also includes the electromagnetic force generated by the solenoid head forcing the movable armature to move away from the valve core assembly, etc. At the same time, the spring force provided by the return spring to the valve core assembly enables the valve core assembly to return to the desired position when or without the electromagnetic force, such as sealing the upper valve port or sealing the lower valve port, or simultaneously opening the upper and lower valve ports. The settings can be set according to actual needs.

[0060] The installation position and sealing matching of the fifth sealing ring 15 include but are not limited to Figure 3 The structure shown can achieve the effect of sealing three leakage channels by optimizing the local features of the components, such as a fifth sealing ring 15 and the magnetic housing 203, the magnetic static pole shoe 14 and the valve seat 8. Figure 6a and 6b As shown, the fifth sealing ring 15 can also achieve sufficient sealing and leakage-proof effects on the three contact surfaces in the triangular space formed by the above three parts.

[0061] Compared with the existing technology, the present disclosure provides a new type of two-position three-way solenoid valve structure, which aims to achieve physical isolation of some functional areas by adopting a variety of rubber seals, avoid the influence of fluid medium and external environment on the operation of the entire valve, improve the assembly consistency and operation reliability of the entire valve and the yield of the entire valve, and reduce the processing and manufacturing costs of some components.

[0062] The flow valve port disclosed in the present invention adopts an end face compression sealing method, and ensures the adjustable optimization of the flow cross-sectional area through various methods, which not only achieves good internal and external leakage performance of the entire valve, but also avoids the dynamic sealing between the moving parts and the stationary parts that often occurs in the sliding valve structure. At the same time, it ensures that the entire valve has lower friction during operation, thereby improving the response speed of the entire valve.

[0063] The basic principles of this application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely examples and not limitations, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit this application to being implemented using the above specific details. In addition, features from one embodiment can be combined with features from one or more other embodiments to obtain more embodiments.

[0064] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0065] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0066] It should also be noted that in the apparatus and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0067] Various changes, substitutions, and modifications of the technology described herein may be made without departing from the teachings defined by the appended claims. Moreover, the scope of the claims herein is not limited to the specific aspects of the processes, machines, manufactures, compositions of things, means, methods, and actions described above. Currently existing or later developed processes, machines, manufactures, compositions of things, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Accordingly, the appended claims include within their scope such processes, machines, manufactures, compositions of things, means, methods, or actions.

[0068] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0069] The above description has been provided for the purpose of illustration and description. This description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A solenoid valve, characterized in that: The invention comprises an electromagnetic part and a valve body part connected to the electromagnetic part, wherein the valve body part comprises a valve seat (8), a valve core assembly arranged in the valve seat (8) and a valve sleeve (1), wherein the valve seat (8) and the valve sleeve (1) are provided with fluid channels communicating with each other, and the electromagnetic part is connected to the valve core assembly to drive the valve core assembly to move in the valve seat (8), thereby changing the position of the valve core assembly relative to the valve port, thereby changing the flow state of the electromagnetic valve; Wherein, a rubber flange is provided at the end of the valve stem in the valve core assembly, and the rubber flange is used to isolate the electromagnetic part and the fluid in the valve seat to prevent impurities in the fluid from entering the electromagnetic part; or, the rubber flange seals the valve port.

2. The solenoid valve according to claim 1, wherein: The rubber flange is arranged on the valve stem of the valve core assembly in a vulcanization manner.

3. The solenoid valve according to claim 2, wherein: The valve core assembly comprises a first valve core (5) and a second valve core (6), wherein the first valve core (5) is connected to the electromagnetic part, and the second valve core (6) is connected to the first valve core (5), wherein the valve stem of the first valve core (5) is provided with an upper rubber flange (502), and the valve stem of the second valve core (6) is provided with a lower rubber flange (602); When the electromagnetic part is powered off and the electromagnetic valve is in a first flow state, the lower rubber flange (602) seals the lower valve port (105) of the valve sleeve (1), the upper rubber flange (502) is away from the upper valve port (104) of the valve sleeve 1, and the upper valve port (104) is connected (812) to the second fluid channel on the valve seat (8); When the electromagnetic part is energized and the electromagnetic valve is in the second flow state, the upper rubber flange (502) seals the upper valve port (104) of the valve sleeve (1), the lower rubber flange (602) is away from the lower valve port (105) of the valve sleeve (1), and the lower valve port (105) is connected (811) to the first fluid channel on the valve seat (8).

4. The solenoid valve according to claim 3, wherein: One end of the valve stem of the first valve core (5) is fixedly connected to the movable armature (4) of the electromagnetic part, and the other end is fixedly connected to the valve stem of the second valve core (6).

5. The solenoid valve according to claim 4, wherein: One end of the valve stem of the first valve core (5) is threadedly connected, welded or press-fitted to the movable armature (4) of the electromagnetic part, and the other end is threadedly connected, welded or press-fitted to the valve stem of the second valve core (6).

6. The solenoid valve according to claim 5, wherein: The upper rubber flange (502) is clamped by the magnetic static pole shoe (14) of the electromagnetic part and the valve sleeve (1), and the lower rubber flange (602) is clamped by the valve sleeve (1) and the inner wall of the valve seat (8).

7. The solenoid valve according to claim 4, wherein: An upper protrusion (103) is provided on the valve sleeve (1) near the end of the upper rubber flange (502), and a lower protrusion (102) is provided on the valve sleeve (1) near the end of the lower rubber flange (602).

8. The solenoid valve according to any one of claims 1 to 7, characterized in that: A sealing ring is provided between the magnetic conductive shell (203) of the electromagnetic part and the hole wall of the valve seat (8).

9. The solenoid valve according to claim 8, wherein: The outer periphery of the coil assembly of the electromagnetic part is provided with a coil skeleton (206) and a coil plastic shell (207) in sequence.

10. The solenoid valve according to claim 1 or 9, characterized in that: The solenoid valve further comprises a reset assembly connected to the valve core assembly, the reset assembly being used to provide a retaining force for the valve core assembly to seal the valve port; Or the reset component is used to reset the valve core component when it is not subjected to external force.

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