Electromagnetic valve

Abstract

The utility model relates to the technical field of lithium batteries, and discloses an electromagnetic valve which comprises a valve body, a valve element and a cover body assembly. The valve body is provided with a valve cavity and a solvent flow channel, and the valve cavity is provided with a first inlet, a second inlet and a first outlet; the solvent runner is provided with a third inlet and a second outlet, and the solvent runner is communicated with the valve cavity through the second outlet; the valve element is movably arranged in the valve cavity and used for adjusting the opening degree of the first inlet and the opening degree of the second inlet and the first outlet. The cover body assembly comprises an elastic gasket, the elastic gasket is arranged in the third inlet or the solvent flow channel, and a notch is formed in the elastic gasket and used for closing or opening the solvent flow channel. The electromagnetic valve has the advantages that the electromagnetic valve on equipment can be maintained on line without being detached, electrolyte crystals at the joint of the valve element and the valve cavity are dissolved, maintenance efficiency is improved, and normal operation of the equipment is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a solenoid valve. Background Art

[0002] In lithium battery injection equipment and formation equipment, when the gas containing electrolyte passes through the solenoid valve in the pipeline, due to the characteristics of the electrolyte, after the solvent of the electrolyte evaporates, crystallization is easily generated at the connection between the solenoid valve valve core and the valve cavity, causing the reciprocating motion of the valve core to become stuck. In severe cases, the valve core and the valve body may be locked, the valve core cannot move, and the solenoid valve will fail.

[0003] When an existing solenoid valve fails, in order to facilitate maintenance of the solenoid valve, after the equipment is shut down, the solenoid valve needs to be manually disassembled from the equipment, and the electronic control part needs to be removed at the same time. Then, it needs to be soaked in solvents such as DMC, DEC, or warm water to dissolve the crystals at the connection between the valve core and the valve cavity. After the solenoid valve is disassembled and cleaned, it needs to be reassembled and installed on the equipment. The maintenance time is long, which affects the normal operation of the equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a solenoid valve that can be maintained online without disassembling the solenoid valve on the equipment, so as to dissolve the electrolyte crystals at the connection between the valve core and the valve cavity, thereby improving maintenance efficiency and avoiding affecting the normal operation of the equipment.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a solenoid valve, comprising: a valve body, a valve core and a cover assembly;

[0006] The valve body is provided with a valve cavity and a solvent flow channel, and the valve cavity is provided with a first inlet, a second inlet, and a first outlet;

[0007] The solvent flow channel is provided with a third inlet and a second outlet, and the solvent flow channel is connected to the valve cavity through the second outlet;

[0008] The valve core is movably disposed in the valve cavity and is used to adjust the opening of the first inlet, the second inlet and the first outlet;

[0009] The cover assembly includes an elastic gasket, which is arranged in the third inlet or the solvent flow channel and is fixedly connected to the valve body. The elastic gasket is provided with a cutout for closing or opening the solvent flow channel.

[0010] When the elastic gasket is deformed by a preset pressure, the solvent can enter the solvent flow channel through the incision.

[0011] In a further embodiment, the elastic gasket is provided at the third inlet.

[0012] In a further embodiment, a central portion of the elastic gasket is provided with an arched portion that arches away from the solvent flow channel, and the arched portion is provided with the incision.

[0013] In a further embodiment, the arched portion is arc-shaped.

[0014] In a further embodiment, the cover assembly further comprises a cover plate, the cover plate being fixed to the valve body and having a through hole formed therein corresponding to the third inlet, the arched portion being located within the through hole, the elastic gasket being coaxially arranged with the third inlet, the elastic gasket being disposed between the valve body and the cover plate, the end surface of one axial end of the elastic gasket being pressed against the cover plate, and the end surface of the other axial end of the elastic gasket being pressed against the axial end surface of the third inlet;

[0015] When the elastic gasket is deformed by a preset pressure, the solvent enters the solvent flow channel from the incision through the through hole.

[0016] In a further embodiment, the cover plate includes a plate body and a tightening portion, the valve body is provided with a countersunk hole, the third inlet is provided at the bottom of the countersunk hole, the elastic gasket is arranged in the countersunk hole, the plate body is fixedly connected to the valve body, and the tightening portion penetrates into the countersunk hole to tighten the elastic gasket, and the through hole passes through the plate body and the tightening portion in sequence to communicate with the incision.

[0017] In a further embodiment, the plate body is fixedly connected to the valve body by screws.

[0018] In a further embodiment, the elastic gasket is a rubber gasket.

[0019] In a further embodiment, the solvent flow channel is T-shaped or L-shaped.

[0020] In a further embodiment, the shape of the incision is a straight line, a Y-shape, or a cross shape.

[0021] Compared with the prior art, the solenoid valve of the present invention has the following advantages: a solvent flow channel is provided within the valve body, the solvent flow channel having a third inlet and a second outlet, the solvent flow channel being connected to the valve cavity through the second outlet, an elastic gasket is provided within the third inlet or the solvent flow channel, and the elastic gasket has a cutout. When electrolyte solvent needs to be added, the elastic gasket is deformed by a preset pressure, and electrolyte solvent is added to the solvent flow channel through the cutout. After the solvent enters the solvent flow channel, it is transported to the connection between the valve core and the valve cavity. Electrolyte crystals at the connection between the valve core and the valve cavity can be dissolved without disassembling the solenoid valve, thereby preventing the valve core from becoming stuck or locked, thereby improving maintenance efficiency and preventing impact on the normal operation of the equipment. When the electrolyte solvent does not need to be added, the elastic gasket returns to its original state without being subject to the preset pressure, closing the solvent flow channel and preventing impact on the pressure environment inside the solenoid valve. The structure is simple and the stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the solenoid valve according to an embodiment of the present utility model;

[0023] Figure 2 1 is a cross-sectional view of a valve body of a solenoid valve according to an embodiment of the present invention;

[0024] Figure 3 1 is a top view of the elastic gasket of the solenoid valve according to an embodiment of the present utility model;

[0025] Figure 4 It is a cross-sectional view of the elastic gasket of the solenoid valve according to an embodiment of the present utility model;

[0026] Figure 5 This is a structural diagram of a cover plate of a solenoid valve according to an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the assembly of the cover plate and elastic gasket of the solenoid valve according to the embodiment of the utility model;

[0028] Figure 7 This is a reference diagram of the solenoid valve in use according to an embodiment of the present invention.

[0029] In the figure, 1. valve body; 11. valve chamber; 111. first inlet; 112. second inlet; 113. first outlet; 12. solvent flow channel; 121. third inlet; 122. second outlet; 13. countersunk hole; 2. valve core; 3. cover assembly; 31. cover plate; 310. through hole; 311. plate body; 312. tightening part; 32. elastic gasket; 321. incision; 322. arched part; 4. on-off valve; 5. metering pump; 6. electrolyte supply tank; 7. gas-liquid separator. DETAILED DESCRIPTION

[0030] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or position relationship are based on the position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the devices and elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of this utility model, it should be understood that the terms "first," "second," etc. are used to describe various types of information, but such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information without departing from the scope of this utility model.

[0033] like Figure 1 As shown, a solenoid valve of a preferred embodiment of the utility model includes a valve body 1, a valve core 2 and a cover body assembly 3, the valve body 1 is provided with a valve cavity 11 and a solvent flow channel 12, the valve cavity 11 is provided with a first inlet 111, a second inlet 112, and a first outlet 113, wherein the valve core 2 is movably provided in the valve cavity 11, and is used to adjust the opening of the first inlet 111, the second inlet 112 and the first outlet 113. In order to facilitate the addition of electrolyte solvent and dissolve the electrolyte crystals at the connection between the valve core 2 and the valve cavity 11, the solvent flow channel 12 is provided with a third inlet 121 and a second outlet 122. The solvent flow channel 12 is connected to the valve cavity 11 through the second outlet 122, that is, the electrolyte solvent can enter the solvent flow channel 12 through the third inlet 121 and be transported to the connection between the valve core 2 and the valve cavity 11 to dissolve the electrolyte crystals. In this embodiment, a positive pressure environment and a negative pressure environment can be formed inside the solenoid valve. Therefore, the first inlet 111 is a negative pressure air inlet, and the second inlet 112 is a positive pressure air inlet. The electrolyte gas flows into the valve cavity 11 from the first inlet 111 or the second inlet 112 and flows out from the first inlet 111. Among them, the number of the first inlet 111, the second inlet 112 and the first outlet 113 can be adjusted according to the actual practical needs of the solenoid valve and is not limited here.

[0034] To prevent the opening of the solvent flow channel 12 from affecting the function of the solenoid valve itself, a cover assembly 3 is provided for closing or opening the solvent flow channel 12, thereby ensuring that the internal environment of the solenoid valve is isolated from the outside world and avoiding affecting the pressure environment inside the solenoid valve. Specifically, to simplify the structure of the cover assembly 3, in this embodiment, the cover assembly 3 includes an elastic gasket 32. The elastic gasket 32 is disposed in the third inlet 121 or the solvent flow channel 12 and is fixedly connected to the valve body 1. The elastic gasket 32 is provided with a notch 321 for closing or opening the solvent flow channel 12. When electrolyte needs to be added for dissolution, the elastic gasket 32 is deformed by a preset pressure, allowing the solvent to enter the solvent flow channel 12 through the notch 321. This allows online maintenance of the solenoid valve without disassembling the solenoid valve. When the electrolyte solvent does not need to be added, the elastic gasket 32 returns to its original state without being affected by the preset pressure, closing the solvent flow channel 12 and avoiding affecting the pressure environment inside the solenoid valve. This has a simple structure and good stability.

[0035] Furthermore, in order to facilitate the assembly of the elastic gasket 32, in some embodiments, since it is not easy to fix the elastic gasket 32 in the solvent flow channel 12, it is necessary to additionally set a corresponding installation structure in the solvent flow channel 12, and the processing cost is relatively high. Therefore, in a preferred embodiment, the elastic gasket 32 is arranged at the third inlet 121.

[0036] Preferably, see Figure 1 、 Figure 4 、 Figure 7 In order to ensure that when negative pressure is input to the first inlet 111 or positive pressure is input to the second inlet 112, the elastic gasket 32 has a certain structural strength to avoid gas leakage or structural failure. Therefore, in some embodiments, the middle part of the elastic gasket 32 is provided with an arched portion 322 that is arched away from the solvent flow channel, and the arched portion 322 is provided with a cutout 321. In the present invention, compared with the general plane design, the arched portion 322 has better pressure bearing capacity and rigidity, which improves the service life of the elastic gasket 32. Since the electrolyte has certain corrosiveness, the elastic gasket 32 also needs to have certain corrosion resistance. The elastic gasket 32 in the present invention is made of corrosion-resistant high-elastic material. The elastic gasket 32 is a rubber gasket. Preferably, in this embodiment, it is made of EPDM material with a hardness between 30-90.

[0037] Further, see Figure 1 、 Figure 5The cam 32 is fixed to the valve body 1 and the cam 32 is fixed to the valve body 1. In order to facilitate the fixing of the elastic gasket 32 and the valve body 1, in some embodiments, the cover assembly 3 further includes a cover plate 31. The cover plate 31 is mainly used to fix the elastic gasket 32. Specifically, the cover plate 31 is fixed to the valve body 1, and is generally fixed to the valve body 1 detachably by screws, which is convenient for disassembly and assembly. In order to facilitate the positioning of the elastic gasket 32 during installation, a through hole 310 corresponding to the third inlet 121 is opened in the cover plate 31, and the arched portion 322 is located in the through hole 310. The elastic gasket 32 is coaxially arranged with the third inlet 121. Specifically, the elastic gasket 32 is arranged between the valve body 1 and the cover plate 31, and the end surface of one axial end of the elastic gasket 32 is pressed against the cover plate 31, and the end surface of the other axial end of the elastic gasket 32 is pressed against the axial end surface of the third inlet 121. When adding electrolyte solvent, when the elastic gasket 32 is deformed by the preset pressure, the solvent enters the solvent flow channel 12 from the incision 321 through the through hole 310.

[0038] Furthermore, in order to facilitate the design of the structure of the arched portion 322, in this embodiment, the arched portion 322 is arc-shaped, which has good structural strength. When a preset pressure is applied to the incision 321 to cause elastic deformation, it can quickly return to its original shape. The size specifications of the arc can be designed and adjusted according to actual design requirements.

[0039] Furthermore, in order to facilitate positioning when installing the cover plate 31 on the valve body 1 and improve the assembly accuracy of the solenoid valve as a whole, refer to Figure 2 、 Figure 5 、 Figure 6 The cover plate 31 includes a plate body 311 and a pressing portion 312. Meanwhile, the valve body 1 is provided with a countersunk hole 13 corresponding to the pressing portion 312. The third inlet 121 is provided at the bottom of the countersunk hole 13. The elastic gasket 32 is disposed within the countersunk hole 13. The plate body 311 is fixedly connected to the valve body 1, and the pressing portion 312 penetrates the countersunk hole 13 to press against the elastic gasket 32. The through hole 310 sequentially penetrates the plate body 311 and the pressing portion 312 to communicate with the cutout 321. Furthermore, to facilitate replacement or disassembly of the elastic gasket 32 after assembly, in some embodiments, the plate body 311 is fixedly connected to the valve body 1 by screws, facilitating quick disassembly.

[0040] Furthermore, in order to facilitate the opening of the incision 321, the shape of the incision 321 is a straight line, a Y-shape or a cross. Preferably, in this embodiment, the shape of the incision 321 is a cross, and the shape of the incision 321 can be adjusted according to actual needs.

[0041] Furthermore, in order to facilitate the design of the solvent flow channel 12 and reduce the difficulty of processing the solvent flow channel 12, the shape of the solvent flow channel 12 is T-shaped or L-shaped. Figure 1Since the first inlet 111 and the second inlet 112 are arranged downward, and the first outlet 113 is arranged upward, in order to facilitate the flow of electrolyte solvent from the solvent flow channel 12 into the valve chamber 11 when the solenoid valve is not operating, in this embodiment, the second outlet 122 is arranged near the first outlet 113 and is connected to the second outlet 122. In some other embodiments, the second outlet 122 of the solvent flow channel 12 can also be arranged near the first inlet 111 and the second inlet 112 and be connected to the first inlet 111 or the second inlet 112. However, this arrangement of the solvent flow channel 12 requires a certain pressure when the solenoid valve is operating to press the electrolyte solvent into the valve chamber 11, or the electrolyte solvent is injected into the solvent flow channel through other pressure vessels. The solvent flow channel 12 can be designed accordingly according to actual design requirements.

[0042] In addition, in some embodiments, since it is difficult to control the amount of electrolyte solvent by manual addition, in order to accurately control the amount of electrolyte solvent added and reduce the labor intensity of workers, a connection structure fixed to an external electrolyte solvent supply device can be set on the cover plate 31, and the electrolyte solvent is added to the solvent flow channel 12 in a timely and quantitative manner through the supply device, thereby realizing automatic addition of electrolyte solvent to the solenoid valve, further improving maintenance efficiency.

[0043] See Figure 7 In some embodiments, the external electrolyte solvent supply device includes an on-off valve 4, a metering pump 5, and an electrolyte supply tank 6 connected in sequence. The electrolyte supply tank 6 is filled with DMC or DEC solvent. The on-off valve 4 and the cover plate 31 are fixedly connected. During normal operation of the solenoid valve, the metering pump 5 pumps out 1g of DMC or DEC solvent every 2 hours, passes through the incision 321 on the elastic gasket 32, and infiltrates the electrolyte crystals between the valve core 2 and the inner wall of the valve cavity 11 through the solvent flow channel 12. When the DMC or DEC solvent dissolves the electrolyte crystals in a negative pressure environment inside the solenoid valve, the mixture will be drawn into the gas-liquid separator 7 for collection and regular discharge. At the same time, in some embodiments, in order to simplify the structure, the elastic gasket 32 is omitted, but this approach will increase the amount of electrolyte solvent used, because the elastic gasket 32 occupies a certain volume in the channel for the flow of electrolyte solvent, reducing the amount of electrolyte solvent used. Under the condition that other conditions are the same, when the elastic gasket 32 is provided, the amount of electrolyte solvent consumed by the solenoid valve during normal operation is 7.2g / day, while when there is no elastic gasket 32, the amount of electrolyte solvent consumed is 18.5g / day.

[0044] In summary, an embodiment of the present invention provides a solenoid valve, wherein a solvent flow channel 12 is provided in the valve body 1, and the solvent flow channel 12 is provided with a third inlet 121 and a second outlet 122. The solvent flow channel 12 is connected to the valve cavity 11 through the second outlet 122, and an elastic gasket 32 is provided in the third inlet 121 or the solvent flow channel 12, and the elastic gasket 32 is provided with a cutout 321. When it is necessary to add electrolyte solvent, the elastic gasket 32 is deformed by the preset pressure, and the electrolyte solvent is added to the solvent flow channel 12 through the cutout 321. After the solvent enters the solvent flow channel 12, it is transported to the connection between the valve core 2 and the valve cavity 11. The electrolyte crystals at the connection between the valve core 2 and the valve cavity 11 can be dissolved without disassembling the solenoid valve, thereby avoiding the valve core 2 from getting stuck or locked, causing the solenoid valve to fail, improving maintenance efficiency, and avoiding affecting the normal operation of the equipment. When there is no need to add electrolyte solvent, the elastic gasket 32 returns to its original state without being affected by the preset pressure, closing the solvent flow channel 12 to avoid affecting the pressure environment inside the solenoid valve. The structure is simple and the stability is good.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A solenoid valve, characterized in that: include: Valve body (1), valve core (2) and cover assembly (3); The valve body (1) is provided with a valve cavity (11) and a solvent flow channel (12); the valve cavity (11) is provided with a first inlet (111), a second inlet (112), and a first outlet (113); The solvent flow channel (12) is provided with a third inlet (121) and a second outlet (122), and the solvent flow channel (12) is communicated with the valve chamber (11) through the second outlet (122); The valve core (2) is movably disposed in the valve cavity (11) and is used to adjust the openings of the first inlet (111), the second inlet (112) and the first outlet (113); The cover assembly (3) includes an elastic gasket (32), which is arranged in the third inlet (121) or the solvent flow channel (12) and is fixedly connected to the valve body (1). The elastic gasket (32) is provided with a cutout for closing or opening the solvent flow channel (12); When the elastic gasket (32) is deformed by a preset pressure, the solvent can enter the solvent flow channel (12) through the incision (321).

2. The solenoid valve according to claim 1, wherein: The elastic gasket (32) is provided at the third inlet (121).

3. The solenoid valve according to claim 1, wherein: The elastic gasket (32) comprises an arched portion (322) that arches away from the solvent flow channel (12), and the arched portion (322) is provided with the cutout (321).

4. The solenoid valve according to claim 3, wherein: The arched portion (322) is arc-shaped.

5. The solenoid valve according to claim 3, wherein: The cover assembly (3) further comprises a cover plate (31), the cover plate (31) being fixed to the valve body (1), and the cover plate (31) being provided with a through hole (310) corresponding to the third inlet (121), the arched portion (322) being located in the through hole (310), the elastic gasket (32) being coaxially arranged with the third inlet (121), the elastic gasket (32) being arranged between the valve body (1) and the cover plate (31), the end surface of one axial end of the elastic gasket (32) being pressed against the cover plate (31), and the end surface of the other axial end of the elastic gasket (32) being pressed against the axial end surface of the third inlet (121); When the elastic gasket (32) is deformed by a preset pressure, the solvent enters the solvent flow channel (12) from the incision (321) through the through hole (310).

6. The solenoid valve according to claim 5, wherein: The cover plate (31) includes a plate body (311) and a pressing portion (312); the valve body (1) is provided with a countersunk hole (13); the third inlet (121) is provided at the bottom of the countersunk hole (13); the elastic gasket (32) is provided in the countersunk hole (13); the plate body (311) is fixedly connected to the valve body (1), and the pressing portion (312) penetrates into the countersunk hole (13) to press against the elastic gasket (32); the through hole (310) sequentially penetrates the plate body (311) and the pressing portion (312) to communicate with the incision (321).

7. The solenoid valve according to claim 6, wherein: The plate body (311) is fixedly connected to the valve body (1) via screws.

8. The solenoid valve according to any one of claims 1 to 7, characterized in that: The elastic gasket (32) is a rubber gasket.

9. The solenoid valve according to any one of claims 1 to 7, characterized in that: The shape of the solvent flow channel (12) is T-shaped or L-shaped.

10. The solenoid valve according to any one of claims 1 to 7, characterized in that: The shape of the incision (321) is a straight line, a Y-shape or a cross shape.

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