Anti-explosion valve airtight plug based on electromagnetic effect

Abstract

The utility model provides an airtight plug of an explosion-proof valve based on an electromagnetic effect. The airtight plug of the anti-explosion valve comprises a connecting part, a moving part and an electromagnetic effect part, the connecting part comprises a second magnetic part, and an anti-explosion valve body is arranged on the connecting part so that a first magnetic part and the second magnetic part can attract each other; the moving part comprises a first guide rod connected with the connecting part, the electromagnetic effect part comprises an elastic piece wound around the first guide rod and a power supply assembly connected with the elastic piece, and the elastic piece can generate magnetism the same as the magnetic field of the second magnetic piece through the power supply assembly. The anti-explosion valve airtight plug based on the electromagnetic effect is simple in overall structure and convenient to machine and manufacture, magnetic attenuation can be made up, then it is guaranteed that the anti-explosion valve body can be normally opened and closed, and inaccurate airtightness testing caused by magnetic attenuation is avoided; and the whole structural design is not changed, the explosion-proof valve body can be matched, the same model is kept, so that the design cost is controlled, the universality is high, and the application range is wide.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to an explosion-proof valve airtight plug based on electromagnetic effects. Background Technology

[0002] During the manufacturing and maintenance of battery packs, good airtightness must be ensured, which is confirmed through airtightness testing. Airtightness testing of power battery packs typically involves sealing high-voltage connectors, low-voltage connectors, balance valves, and explosion-proof valves using specially designed plugs. Air vents are then created on one or more of these plugs, through which a compressed air source is connected to increase the air pressure inside the battery pack (or a vacuum device is connected to provide negative pressure) to achieve the pressure required for airtightness testing (positive or negative pressure). Finally, airtightness testing is performed using airtightness testing equipment. Airtightness testing requires providing high air pressure inside the battery pack, and one or more of the airtight plugs matched to the battery pack need to have air vents for pressurization or vacuuming. Although the aforementioned plug locations can be pressurized or vacuumed, the air intake area of ​​high-voltage connectors, low-voltage connectors, and balance valves is relatively small, resulting in a low pressurization or vacuuming rate, which is detrimental to production or maintenance efficiency. Therefore, pressurization or vacuuming through explosion-proof valves with larger air intake areas is the optimal choice.

[0003] The current design principle of the explosion-proof valve airtight plug is generally to reserve a fixing groove on the explosion-proof valve shell and clamp the explosion-proof valve plug into the fixing groove. Pressing the plug handle makes the plug cavity press against the explosion-proof valve shell. The magnet inside the explosion-proof valve plug magnetically attracts the iron plate of the explosion-proof valve, causing the valve core of the explosion-proof valve to move outward and thus open the valve cover of the explosion-proof valve. After that, the subsequent pressurization or vacuuming process and airtightness test process can be carried out. However, the existing explosion-proof valve airtightness test inevitably has the following problems: (1) Since the process of opening the explosion-proof valve core adopts the magnetic attraction method, the magnet will inevitably face the problem of magnetic attenuation during use, which will cause the explosion-proof valve plug function to fail. (2) When designing a battery pack on a platform, the design cost is generally controlled by keeping the shape of the explosion-proof valve unchanged and keeping the same model of the matching airtight plug. Different explosion-proof valve opening pressure requirements are met by only changing the spring force of the explosion-proof valve and other possible auxiliary parts. Therefore, the magnet inside the explosion-proof valve plug needs to be compatible with the explosion-proof valve with the maximum opening pressure. Installing a magnet with the strongest possible magnet within the limited size space of the explosion-proof valve plug is undoubtedly a challenge.

[0004] Therefore, it is necessary to design an explosion-proof valve airtight plug based on electromagnetic effects to solve the above problems. Utility Model Content

[0005] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides an explosion-proof valve airtight plug based on electromagnetic effect, which effectively solves the problems of magnetic attenuation leading to inaccurate testing during the airtightness test of existing explosion-proof valve plugs, as well as the need to consider cost and rational layout in the design and layout of explosion-proof valve plugs.

[0006] According to this utility model, an explosion-proof valve airtight plug based on electromagnetic effect is provided for airtightness testing of the explosion-proof valve body. The explosion-proof valve body includes a first magnetic element. The explosion-proof valve airtight plug based on electromagnetic effect includes a connecting part, a moving part, and an electromagnetic effect part. The connecting part includes a second magnetic element. The explosion-proof valve body is disposed on the connecting part so that the first magnetic element and the second magnetic element attract each other. The moving part includes a first guide rod connected to the connecting part. The electromagnetic effect part includes an elastic element wound around the first guide rod and a power supply assembly connected to the elastic element. The power supply assembly enables the elastic element to generate magnetism with the same magnetic field as the second magnetic element.

[0007] Preferably, the connecting part further includes a support housing and a sealing cavity housing, the second magnetic element is disposed at the end of the first guide rod, the sealing cavity housing is sleeved on the first guide rod, and the sealing cavity housing is located inside the support housing.

[0008] Preferably, the outer wall of the explosion-proof valve body is provided with a fixing groove, and the end of the support housing facing the explosion-proof valve body is provided with a limiting frame. When the explosion-proof valve body is provided at the connecting part, the limiting frame is engaged with the fixing groove.

[0009] Preferably, the elastic element is disposed inside the support housing, with a first end of the elastic element connected to the outer wall of the sealing cavity housing and a second end of the elastic element connected to the inner wall of the support housing.

[0010] Preferably, the elastic element includes a spring and a solenoid, both of which are wound around the first guide rod, and the solenoid is connected to the power supply assembly.

[0011] Preferably, the elastic element includes a spring and an insulating element, both of which are wound around the first guide rod, the insulating element is sleeved on the spring, and the spring is connected to the power supply assembly.

[0012] Preferably, the elastic element includes a spring and a solenoid, the spring is hollow inside, the solenoid passes through the hollow interior of the spring, and the spring is wound around the first guide rod.

[0013] Preferably, the movable part further includes a second guide rod and a handle, wherein the two ends of the second guide rod are respectively connected to the first guide rod and the handle.

[0014] Preferably, both the interior of the first guide rod and the interior of the second guide rod are provided with air guide holes, and the side wall of the second guide rod is provided with vent holes. When the explosion-proof valve body is provided in the connecting part, the vent holes are connected to the explosion-proof valve body.

[0015] Preferably, the power supply assembly includes a first wire, a second wire, a third wire, and a resistor box. The first end of the first wire and the first end of the second wire are respectively connected to the two ends of the elastic member. The second end of the second wire is connected to the first end of the third wire through the resistor box. The second ends of the first wire and the second ends of the third wire are respectively connected to the positive and negative terminals of an external power supply.

[0016] According to this utility model, the explosion-proof valve airtight plug based on electromagnetic effect, through the cooperation of the connecting part, the moving part, and the electromagnetic effect part, can realize the assembly and connection of the explosion-proof valve body, facilitating the airtightness testing of the battery pack. The overall structure of this explosion-proof valve airtight plug is simple and easy to manufacture. Through the cooperation of the elastic element of the electromagnetic effect part and the power supply component, the second magnetic element can compensate for magnetic attenuation, thereby ensuring that the explosion-proof valve body can open and close normally, thus avoiding inaccurate airtightness testing due to magnetic attenuation. Since the elastic element can simultaneously have a reset function and a magnetic function, the overall structural design of this explosion-proof valve airtight plug based on electromagnetic effect remains unchanged. While maintaining the same external and internal design, it can still be matched with the explosion-proof valve body, keeping the same model and thus controlling design costs, effectively extending the service life of the airtight plug. It also does not require additional magnets, allowing it to adapt to explosion-proof valve bodies with different opening pressures, demonstrating strong versatility and a wide range of applications.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an explosion-proof valve airtight plug based on electromagnetic effect according to an embodiment of the present invention is shown;

[0020] Figure 2 Another structural schematic diagram of an explosion-proof valve airtight plug based on electromagnetic effect according to an embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram of the structure of the explosion-proof valve body according to an embodiment of the present invention is shown;

[0022] Figure 4 A schematic diagram showing the connection between the explosion-proof valve body and the explosion-proof valve airtight plug based on electromagnetic effect according to an embodiment of the present invention is shown.

[0023] Reference numerals: 1-Connecting part; 101-Second magnetic component; 102-Support housing; 103-Sealing cavity housing; 104-Limiting frame; 2-Moving part; 201-First guide rod; 202-Second guide rod; 203-Handle; 204-Ventilation hole; 3-Electromagnetic effect part; 301-Elastic component; 302-First wire; 303-Second wire; 304-Third wire; 305-Resistor box; 4-Explosion-proof valve body; 401-First magnetic component; 402-Fixing groove; 403-Valve housing; 404-Valve core. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] According to the present invention, an explosion-proof valve airtight plug based on electromagnetic effect is provided, such as... Figures 1 to 4 As shown, this electromagnetic effect-based explosion-proof valve airtight plug is used for airtightness testing of battery packs, and can assist in airtightness testing of battery packs at the explosion-proof valve body 4 described below. This electromagnetic effect-based explosion-proof valve airtight plug includes a connecting part 1, a moving part 2, and an electromagnetic effect part 3.

[0029] In the following description, reference will be made to Figures 1 to 4 The detailed structure of the connecting part 1, the moving part 2, and the electromagnetic effect part 3 of the airtight plug of the explosion-proof valve based on electromagnetic effect is described in detail. Furthermore, in the description of the embodiment, the explosion-proof valve body 4 is the explosion-proof valve in the prior art, and the structure and principle of the explosion-proof valve body 4 are known to those skilled in the art.

[0030] like Figures 1 to 4 As shown, in this embodiment, the explosion-proof valve body 4 may include a first magnetic element 401, which, when driven by the first magnetic element 401, allows the valve core 404 of the explosion-proof valve body 4 to open and close. Figure 3 In the open state, the explosion-proof valve body 4 is in the middle, allowing for pressurization or vacuuming. The connecting portion 1 of the electromagnetically based explosion-proof valve airtight plug may include a second magnetic element 101. The second magnetic element 101 and the first magnetic element 401 are magnetically attracted to each other, causing the first magnetic element 401 to move. Preferably, both the first magnetic element 401 and the second magnetic element 101 can be magnets. The explosion-proof valve body 4 is disposed on the connecting portion 1 so that the first magnetic element 401 and the second magnetic element 101 can attract each other. The connecting portion 1 can be located at one end of the electromagnetically based explosion-proof valve airtight plug, and the explosion-proof valve body 4 can be installed on the connecting portion 1, thus achieving the connection between the explosion-proof valve body 4 and the explosion-proof valve airtight plug.

[0031] Further, see Figure 1 and Figure 2 The moving part 2 may include a first guide rod 201 connected to the connecting part 1. The electromagnetic effect part 3 may include an elastic member 301 wound around the first guide rod 201 and a power supply assembly connected to the elastic member 301. The power supply assembly enables the elastic member 301 to generate magnetism similar to that of the second magnetic member 101. The user can pull the moving part 2, thereby moving the first guide rod 201. The direction of movement may be, for example, the axial direction of the airtight plug of the explosion-proof valve based on the electromagnetic effect. When the first guide rod 201 moves, it drives a portion of the components of the connecting part 1 (for example, the sealing cavity housing 103 described below) to move away from the explosion-proof valve body 4 for installation of the explosion-proof valve body 4. At this time, the sealing cavity housing 103 compresses the elastic member 301. Afterward, the elastic member 301 can use its elastic force to reset the portion of the connecting part 1. In this process, if the magnetism of the second magnetic element 101 does not weaken, meaning the valve core 404 can open normally through the mutual attraction of the first magnetic element 401 and the second magnetic element 101, then the electromagnetic effect unit 3 does not need to be energized, and the elastic element 301 can simply be used as a normal reset element. If the magnetism of the second magnetic element 101 weakens, the valve core 404 cannot open normally. At this time, the power supply component is energized, allowing the elastic element 301 to generate magnetism with the same magnetic field as the second magnetic element 101, thereby increasing the magnetism at the location of the second magnetic element 101. In other words, the elastic element 301 can act as another magnetic element, ensuring that the first magnetic element 401 can still be attracted normally at the location of the second magnetic element 101, thus guaranteeing the normal use of the explosion-proof valve's airtight plug. In addition, even if the magnetism of the second magnetic element 101 does not weaken, the electromagnetic effect unit 3 can be energized to enhance the magnetism at the location of the second magnetic element 101, adapting to explosion-proof valve bodies 4 with different opening pressures.

[0032] Furthermore, since the elastic element 301 can have both reset and magnetic functions, the overall structural design of the explosion-proof valve airtight plug based on the electromagnetic effect remains unchanged. With the external and internal design unchanged, it can be matched with the explosion-proof valve body 4, maintaining the same model and thus controlling design costs. In addition, the principle of generating the electromagnetic effect can be understood as the solenoid (i.e., the elastic element 301) generating a magnetic field similar to a bar magnet after being energized, and the direction of the magnetic field can be determined using Ampere's law.

[0033] This explosion-proof valve airtight plug based on electromagnetic effect, through the cooperation of the connecting part 1, the moving part 2, and the electromagnetic effect part 3, enables the assembly and connection of the explosion-proof valve body 4, facilitating airtightness testing of the battery pack. The overall structure of this explosion-proof valve airtight plug is simple and easy to manufacture. Through the cooperation of the elastic element 301 of the electromagnetic effect part 3 and the power supply component, the second magnetic element 101 can compensate for magnetic attenuation, thereby ensuring that the explosion-proof valve body 4 can open and close normally, thus avoiding inaccurate airtightness testing due to magnetic attenuation. Since the elastic element 301 has both reset and magnetic functions, the overall structural design of this explosion-proof valve airtight plug based on electromagnetic effect remains unchanged. While maintaining the same external and internal design, it can still be matched with the explosion-proof valve body 4, keeping the same model to control design costs. It also eliminates the need for additional magnets, allowing it to adapt to explosion-proof valve bodies 4 with different opening pressures, demonstrating strong versatility and a wide range of applications.

[0034] Preferably, such as Figure 3 As shown, in this embodiment, the explosion-proof valve body 4 may include a first magnetic element 401, a fixing groove 402, a valve housing 403, and a valve core 404. The fixing groove 402 is disposed on the outer wall of the valve housing 403, the valve core 404 passes through the valve housing 403, and the first magnetic element 401 is disposed at the end of the valve core 404.

[0035] Preferably, such as Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the connecting part 1 may further include a support housing 102 and a sealing cavity housing 103. A second magnetic element 101 is disposed at the end of the first guide rod 201, and the sealing cavity housing 103 is sleeved on the first guide rod 201, located inside the support housing 102. The sealing cavity housing 103 can press against the valve housing 403, forming a sealing cavity between them, facilitating airtightness testing. The support housing 102 serves as the outer shell of the electromagnetically based explosion-proof valve airtight plug, enabling the installation and connection of the explosion-proof valve body 4.

[0036] Preferably, such as Figures 1 to 4 As shown, in the embodiment, the outer wall of the explosion-proof valve body 4 is provided with a fixing groove 402, that is, the fixing groove 402 is provided on the outer wall of the valve housing 403. The end of the support housing 102 facing the explosion-proof valve body 4 is provided with a limiting frame 104. When the explosion-proof valve body 4 is provided in the connecting part 1, the limiting frame 104 is engaged in the fixing groove 402 to fix and limit the explosion-proof valve body 4.

[0037] Preferably, such as Figure 1 , Figure 2 and Figure 4As shown, in this embodiment, the elastic element 301 is disposed inside the support housing 102. The first end of the elastic element 301 is connected to the outer wall of the sealing cavity housing 103, and the second end of the elastic element 301 is connected to the inner wall of the support housing 102. After the sealing cavity housing 103 moves, the elastic element 301 can cause the sealing cavity housing 103 located inside the support housing 102 to return to its original position.

[0038] Preferably, such as Figure 1 , Figure 2 and Figure 4 As shown in the embodiments, for the specific structure of the elastic element 301, three feasible embodiments are shown in the following description.

[0039] In the first embodiment, the elastic element 301 may include a spring and a solenoid, both of which are wound around the first guide rod 201. The solenoid is connected to the power supply assembly. The spring can serve as a reset element, and the solenoid can serve as a magnetic element when energized. The spring and solenoid form a composite elastic element 301, which can achieve both the reset function and the magnetic attraction function.

[0040] In the second embodiment, the elastic element 301 may include a spring and an insulating element, both of which are wound around the first guide rod 201. The insulating element is sleeved on the spring, and the spring is connected to the power supply assembly. The insulating element covering the outer wall of the spring allows the spring itself to function as a solenoid, and both ends of the spring can be connected to the power supply assembly for energizing. The insulating element may be, for example, a common insulating material in the prior art, such as rubber.

[0041] In a third embodiment, the elastic element 301 may include a spring and a solenoid. The spring is hollow inside, and the solenoid passes through the hollow interior of the spring. The spring is wound around the first guide rod 201. The spring with the built-in solenoid can simultaneously achieve the functions of resetting and magnetic attraction.

[0042] However, this is not the only option; there can be many other implementation methods, as long as the elastic element 301 can simultaneously have a reset function and a magnetic attraction function.

[0043] Preferably, such as Figure 1 , Figure 2 and Figure 4As shown, in this embodiment, the movable part 2 may further include a second guide rod 202 and a handle 203. The two ends of the second guide rod 202 are respectively connected to the first guide rod 201 and the handle 203. The user can pull the handle 203, which, through the second guide rod 202 and the first guide rod 201, causes the sealing cavity housing 103 to maintain a suitable gap with the limiting frame 104. The supporting housing 102 is locked in the fixing groove 402 of the explosion-proof valve body 4 by the limiting frame 104. Then, the handle 203 is released, and the elastic force of the elastic element 301 is used to press the sealing cavity housing 103, forming a sealed cavity between the sealing cavity housing 103 and the valve housing 403.

[0044] Preferably, such as Figure 1 , Figure 2 and Figure 4 As shown, in the embodiment, both the interior of the first guide rod 201 and the interior of the second guide rod 202 are provided with air guide holes (not shown due to viewing angle). The side wall of the second guide rod 202 is provided with a vent hole 204. When the explosion-proof valve body 4 is provided in the connecting part 1, the vent hole 204 is connected to the explosion-proof valve body 4 to facilitate inflation or vacuuming. With the explosion-proof valve body 4 located at the connecting part 1, the first magnetic element 401 and the second magnetic element 101 attract each other, causing the valve core 404 to move and the explosion-proof valve body 4 to be in the open state. During this process, if the magnetism of the second magnetic element 101 does not weaken, that is, the valve core 404 can be opened normally through the mutual attraction of the first magnetic element 401 and the second magnetic element 101, then the electromagnetic effect part 3 does not need to be energized. If the magnetism of the second magnetic element 101 weakens, the valve core 404 cannot be opened normally. At this time, the power supply component is energized, so that the elastic element 301 can generate the same magnetism as the magnetic field of the second magnetic element 101, thereby increasing the magnetism at the location of the second magnetic element 101, so that the second magnetic element 101 can still attract the first magnetic element 401 normally, opening the explosion-proof valve body 4. Finally, the battery pack is pressurized or evacuated through the vent 204 and an airtightness test is performed.

[0045] Preferably, such as Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the power supply assembly may include a first wire 302, a second wire 303, a third wire 304, and a resistor box 305. The first end of the first wire 302 and the first end of the second wire 303 are respectively connected to both ends of the elastic member 301. The second end of the second wire 303 is connected to the first end of the third wire 304 via the resistor box 305. The second ends of the first wire 302 and the third wire 304 are respectively connected to the positive and negative terminals of an external power supply. The resistor box 305 is connected in series between the second wire 303 and the third wire 304 to control the elastic member 301 to allow a suitable current to pass through it. Furthermore, the external power supply can be low-voltage DC, which is convenient and safe to operate.

[0046] The process of using the explosion-proof valve airtight plug based on electromagnetic effect is as follows: The user can pull the handle 203, and through the second guide rod 202 and the first guide rod 201, the sealing cavity housing 103 and the limiting frame 104 maintain a suitable gap. The support housing 102 is locked in the fixing groove 402 of the explosion-proof valve body 4 through the limiting frame 104. Then, the handle 203 is released, and the elastic force of the elastic element 301 is used to press the sealing cavity housing 103 tightly, and a sealing cavity is formed between the sealing cavity housing 103 and the valve housing 403. With the explosion-proof valve body 4 located at the connecting part 1, the first magnetic element 401 and the second magnetic element 101 attract each other, causing the valve core 404 to move and the explosion-proof valve body 4 to be in the open state. During this process, if the magnetism of the second magnetic element 101 does not weaken, that is, the valve core 404 can be opened normally by the mutual attraction of the first magnetic element 401 and the second magnetic element 101, then the electromagnetic effect part 3 does not need to be energized. If the magnetism of the second magnetic element 101 weakens, the valve core 404 cannot be opened normally. At this time, the power supply component is energized, so that the elastic element 301 can generate the same magnetism as the magnetic field of the second magnetic element 101, thereby increasing the magnetism at the location of the second magnetic element 101, so that the second magnetic element 101 can still attract the first magnetic element 401 normally, opening the explosion-proof valve body 4. In addition, even if the magnetism of the second magnetic element 101 does not weaken, the electromagnetic effect part 3 can still be energized to increase the magnetism. Finally, the battery pack is pressurized or evacuated through the vent 204 and an airtightness test is performed.

[0047] This electromagnetically-based explosion-proof valve airtight plug, through the cooperation of its connecting part, moving part, and electromagnetic effect part, enables the assembly and connection of the explosion-proof valve body, facilitating airtightness testing of the battery pack. The overall structure of this explosion-proof valve airtight plug is simple and easy to manufacture. Through the cooperation of the elastic element of the electromagnetic effect part and the power supply component, the second magnetic element can compensate for magnetic attenuation, thereby ensuring the explosion-proof valve body can open and close normally, thus avoiding inaccurate airtightness testing due to magnetic attenuation. Since the elastic element has both reset and magnetic functions, the overall structural design of this electromagnetically-based explosion-proof valve airtight plug remains unchanged. With the external and internal design unchanged, it can still be matched with the explosion-proof valve body, maintaining the same model and thus controlling design costs, effectively extending the service life of the airtight plug. It also does not require additional magnets, allowing it to adapt to explosion-proof valve bodies with different opening pressures, demonstrating strong versatility and a wide range of applications.

[0048] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. An explosion-proof valve airtight plug based on electromagnetic effect, used for airtightness testing of the explosion-proof valve body, wherein the explosion-proof valve body includes a first magnetic element, characterized in that, The explosion-proof valve airtight plug based on electromagnetic effect includes a connecting part, a moving part, and an electromagnetic effect part. The connecting part includes a second magnetic element, and the explosion-proof valve body is disposed on the connecting part so that the first magnetic element and the second magnetic element attract each other. The moving part includes a first guide rod connected to the connecting part. The electromagnetic effect part includes an elastic element wound around the first guide rod and a power supply assembly connected to the elastic element. The power supply assembly enables the elastic element to generate a magnetic field with the same magnetic field as the second magnetic element.

2. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 1, characterized in that, The connecting part further includes a support housing and a sealing cavity housing. The second magnetic element is disposed at the end of the first guide rod, the sealing cavity housing is sleeved on the first guide rod, and the sealing cavity housing is located inside the support housing.

3. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 2, characterized in that, The outer wall of the explosion-proof valve body is provided with a fixing groove, and the end of the support housing facing the explosion-proof valve body is provided with a limiting frame. When the explosion-proof valve body is located at the connecting part, the limiting frame is engaged with the fixing groove.

4. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 2, characterized in that, The elastic element is disposed inside the support housing, with its first end connected to the outer wall of the sealing cavity housing and its second end connected to the inner wall of the support housing.

5. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 1, characterized in that, The elastic element includes a spring and a solenoid, both of which are wound around the first guide rod, and the solenoid is connected to the power supply assembly.

6. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 1, characterized in that, The elastic element includes a spring and an insulating element, both of which are wound around the first guide rod. The insulating element is sleeved on the spring, and the spring is connected to the power supply assembly.

7. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 1, characterized in that, The elastic element includes a spring and a solenoid. The spring is hollow inside, and the solenoid passes through the hollow interior of the spring. The spring is wound around the first guide rod.

8. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 1, characterized in that, The movable part further includes a second guide rod and a handle, with the two ends of the second guide rod connected to the first guide rod and the handle, respectively.

9. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 8, characterized in that, Both the first guide rod and the second guide rod have air vents inside. The side wall of the second guide rod has a vent. When the explosion-proof valve body is located in the connecting part, the vent is connected to the explosion-proof valve body.

10. The explosion-proof valve airtight plug based on electromagnetic effect according to claim 1, characterized in that, The power supply assembly includes a first wire, a second wire, a third wire, and a resistor box. The first end of the first wire and the first end of the second wire are respectively connected to the two ends of the elastic member. The second end of the second wire is connected to the first end of the third wire through the resistor box. The second ends of the first wire and the second ends of the third wire are respectively connected to the positive and negative terminals of an external power source.

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