Magnetic control type breathable anti-explosion valve with protective structure

Abstract

The utility model relates to the technical field of explosion-proof valves, in particular to a magnetic control type ventilation explosion-proof valve with a protection structure, which comprises a valve seat, a fixing seat is arranged in the valve seat, a magnetic attraction component and a ventilation component are arranged in the fixing seat, and a plurality of supporting arms are further arranged in the valve seat. Wherein a pipe fitting is fixedly installed between the free ends of the multiple supporting arms, compared with spring control, the mode that opening is controlled through the magnetic attraction assembly is adopted, better protective performance and controllability can be achieved, the design that the protective sleeve is additionally arranged is adopted for achieving protection of the guide rod, and therefore the protective sleeve can be used for protecting the guide rod. Therefore, the problems that the guide rod is completely exposed to the outside, dust enters between the guide rod and the pipe fitting during long-time protection, the guide rod is blocked or stuck and the like, and pressure relief is not timely can be solved, and the working stability of the breathable anti-explosion valve is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valves, in particular to a magnetically controlled breathable explosion-proof valve with a protective structure. Background Art

[0002] As lithium-ion battery technology becomes increasingly mature, the demand for lithium-ion batteries in industries such as electric vehicles, UPS, and energy storage power stations is also gradually increasing, so it is particularly important to ensure the quality of lithium-ion batteries. At present, for lithium-ion batteries, its safety is a very important technical indicator, and it is also a problem that restricts the development of lithium-ion batteries. When lithium-ion batteries are in use, it is inevitable that gas will be generated inside the battery, resulting in increased pressure inside the battery, which will result in serious problems such as bulging of the battery shell, leakage, and even explosion. Therefore, once gas is generated inside the battery, it must be discharged immediately, and a pressure relief valve needs to be installed on the battery to discharge the excessive internal pressure.

[0003] The current explosion-proof vent valve structure mostly adopts a design of fixing a guide rod under the valve cover for guidance, such as a pressure relief valve and a battery disclosed in Chinese patent publication number "CN219954337U". The pressure relief valve is installed in the pressure relief hole of the battery, and includes a movable part and a valve cover. The pressure relief hole includes a second port close to the battery cell. The valve cover of the pressure relief valve is provided with a first guide port penetrating along a first direction, and the movable part includes a rod body and a baffle.

[0004] In the actual working process, since the guide rod is completely exposed to the outside, dust is very easy to enter the guide rod and the pipe fittings, which may easily cause the guide rod to get stuck or jammed during the pressure relief process, resulting in pressure relief failure. Based on this, in order to improve the protection of the guide rod, we propose a magnetically controlled breathable explosion-proof valve with a protective structure. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art that dust is easily introduced into the guide rod and the pipe fittings, which easily leads to the guide rod being stuck or jammed during the pressure relief process, resulting in the problem of pressure relief failure, and to propose a magnetically controlled breathable explosion-proof valve with a protective structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A magnetically controlled air-permeable explosion-proof valve with a protective structure is designed, comprising a valve seat, a fixed seat is placed inside the valve seat, a magnetic suction component and an air-permeable component are arranged inside the fixed seat, and a plurality of support arms are also arranged inside the valve seat;

[0008] Among them, a pipe is fixedly installed between the free ends of several support arms, a guide rod is movably inserted in the pipe, and a protective sleeve is detachably connected below the pipe, and the protective sleeve is sleeved on the outside of the guide rod.

[0009] Furthermore, a plurality of air holes are formed on the outer side of the pipe, and the air holes and the inside of the guide rod form an air passage extending to the air permeable component.

[0010] Furthermore, at least one groove is provided on the outer surface of the pipe, a positioning pin is inserted into the interior of the groove through a spring, and the outer side of the protective sleeve has a positioning hole matched with the positioning pin.

[0011] Furthermore, the magnetic attraction assembly includes an iron ring installed inside the valve seat and a magnetic ring fixed inside the fixing seat.

[0012] Furthermore, an inner sealing ring is nested on the lower side of the fixing seat, and an outer sealing ring is nested on the lower end surface of the valve seat.

[0013] Furthermore, the ventilation component includes a diaphragm, a pressing plate and a cover plate installed inside the fixing seat, and the end surfaces of the pressing plate and the cover plate are provided with ventilation holes.

[0014] Furthermore, the guide rod includes a rod portion and a stopper portion fixedly mounted on the bottom end of the rod portion, the rod portion is a hollow tube, a threaded tube is provided below the fixing seat, and the threaded tube is threadedly connected to the rod portion.

[0015] Furthermore, at least two mounting wings are provided on the outer side of the valve seat, and mounting holes are provided on the end surfaces of the mounting wings.

[0016] The utility model proposes a magnetically controlled breathable explosion-proof valve with a protective structure, and its beneficial effects are: the utility model adopts a magnetic suction component to control the opening, which can provide better protection and controllability than spring control, and secondly adopts a design of adding a protective cover to realize the protection of the guide rod, so that the guide rod can be prevented from being completely exposed to the outside. During long-term protection, dust enters between the guide rod and the pipe fitting, causing the guide rod to become stuck or jammed, resulting in the problem of untimely pressure relief, thereby effectively improving the working stability of the breathable explosion-proof valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the exploded structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the valve seat structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model in a normal state;

[0020] Figure 4 It is a schematic diagram of the structure of the pressure relief state of the utility model;

[0021] Figure 5 It is a three-dimensional diagram of the utility model.

[0022] In the figure: 1. valve seat; 11. support arm; 12. pipe fitting; 13. air vent; 14. air duct; 15. spring; 16. positioning pin; 17. positioning hole; 18. outer sealing ring; 19. mounting wing; 2. magnetic suction component; 21. iron ring; 22. magnetic ring; 3. air permeable component; 31. diaphragm; 32. pressing plate; 33. cover plate; 4. guide rod; 41. rod part; 42. stopper part; 5. protective cover; 6. fixing seat; 61. inner sealing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-5 An embodiment of the utility model discloses a magnetically controlled air-permeable explosion-proof valve with a protective structure, the air-permeable explosion-proof valve comprises a valve seat 1, specifically, a fixed seat 6 is placed inside the valve seat 1, a magnetic attraction component 2 and an air-permeable component 3 are arranged inside the fixed seat 6, and a plurality of support arms 11 are also arranged inside the valve seat 1;

[0025] Among them, a pipe fitting 12 is fixedly installed between the free ends of the support arms 11, a guide rod 4 is movably inserted in the pipe fitting 12, and a protective cover 5 is detachably connected below the pipe fitting 12, and the protective cover 5 is sleeved on the outside of the guide rod 4.

[0026] In summary, in the embodiment of the utility model, a design of adding a protective cover 5 is adopted to achieve protection of the guide rod 4, so that the guide rod 4 can be prevented from being completely exposed to the outside. During long-term protection, dust enters between the guide rod 4 and the pipe fitting 12, causing the guide rod 4 to become stuck or jammed, resulting in the problem of untimely pressure relief, thereby effectively improving the working stability of the breathable explosion-proof valve.

[0027] In some embodiments, a plurality of air holes 13 are provided on the outside of the tube 12 of the utility model. The air holes 13 and the inside of the guide rod 4 form an air passage 14 extending to the ventilation component 3. The purpose of providing the air holes 13 is to allow the gas of the battery pack to be protected to enter along the air holes 13, and then enter into the ventilation component 3 along the guide rod 4 to achieve ventilation, thereby ensuring that the air pressure inside and outside the battery pack is balanced under normal conditions.

[0028] On the basis of the above-mentioned embodiment, in the utility model, at least one groove is provided on the outer surface of the pipe fitting 12, and a positioning pin 16 is movably inserted in the interior of the groove through a spring 15, and the outer side of the protective cover 5 has a positioning hole 17 adapted to the positioning pin 16, that is, in this embodiment, an elastically retractable positioning pin 16 is adopted to realize the connection and fixation of the protective cover 5. During installation, the protective cover 5 is inserted inward until the positioning pin 16 is engaged with the positioning hole 17. When the protective cover 5 needs to be disassembled for disassembly and maintenance of the internal parts, it is only necessary to push the positioning pin 16 inward to separate it from the positioning hole 17, and the protective cover 5 can be easily removed. The operation process is simple and convenient. In addition, in another embodiment, the positioning pin 16 in the utility model is preferably set to two, and the two positioning pins 16 are symmetrically arranged to realize the stable connection of the protective cover 5.

[0029] Furthermore, in the utility model, the magnetic attraction component 2 includes an iron ring 21 installed inside the valve seat 1 and a magnetic ring 22 fixed inside the fixing seat 6. The magnetic attraction force generated between the magnetic ring 22 and the iron ring 21 is used to close the valve in the initial state. When the internal air pressure is too high, the air pressure overcomes the magnetic force to push the above-mentioned fixing seat 6 to move, thereby completing the opening of the valve and realizing the pressure relief operation.

[0030] like Figure 3 As shown, under normal working conditions, the magnetic ring 22 and the iron ring 21 attract each other and close to each other, playing a role of dust and water prevention. The internal and external gases move through the air vents 13 and the guide rod 4, and circulate with each other through the diaphragm 31 to achieve pressure balance inside and outside the sealed cavity;

[0031] like Figure 4 As shown, in the pressure relief state, when the internal air pressure is greater than or equal to the opening pressure set by the explosion-proof valve, the fixing seat 6 is pushed open, the magnetic ring 22 is separated from the iron ring 21, and the internal gas flows outward to achieve rapid pressure relief.

[0032] Of course, considering the assembly sealing of the explosion-proof valve, in the utility model, an inner sealing ring 61 is nested on the lower side of the fixing seat 6 , and an outer sealing ring 18 is nested on the lower end surface of the valve seat 1 .

[0033] Furthermore, the breathable component 3 in the utility model includes a diaphragm 31, a pressing plate 32 and a cover plate 33 installed inside the fixed seat 6. The end faces of the pressing plate 32 and the cover plate 33 both have air holes. The diaphragm 31 is a waterproof and breathable membrane, which can be fixed to the inside of the fixed seat 6 by bonding. The pressing plate 32 and the above-mentioned iron ring 21 can be set to stainless iron to improve the durability of the explosion-proof valve. Furthermore, in this embodiment, the cover plate 33 and the pressing plate 32 are tightly pressed inside the fixed seat 6.

[0034] In some embodiments, the guide rod 4 includes a rod portion 41 and a stop portion 42 fixedly installed at the bottom end of the rod portion 41, the rod portion 41 is a hollow tube, and a threaded tube is provided below the fixing seat 6, the threaded tube is threadedly connected to the rod portion 41, and the stop portion 42 is used to limit the maximum stroke of the guide rod 4 to improve the installability of the work. At the same time, the guide rod 4 and the fixing seat 6 are threadedly connected to further improve the convenience of assembly and maintenance and the humanization of operation.

[0035] It should be noted that in the present invention, at least two mounting wings 19 are provided on the outer side of the valve seat 1, and mounting holes are provided on the end faces of the mounting wings 19. The mounting wings 19 are provided to improve the convenience of installing the valve seat 1. Specifically, in the embodiment of the present invention, the two mounting wings 19 are symmetrically arranged.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A magnetically controlled gas-permeable explosion-proof valve with a protective structure, comprising a valve seat (1), characterized in that: A fixing seat (6) is placed inside the valve seat (1), a magnetic attraction component (2) and a breathable component (3) are arranged inside the fixing seat (6), and a plurality of support arms (11) are also arranged inside the valve seat (1); A pipe (12) is fixedly installed between the free ends of the plurality of support arms (11), a guide rod (4) is movably inserted into the pipe (12), and a protective sleeve (5) is detachably connected below the pipe (12), and the protective sleeve (5) is sleeved on the outside of the guide rod (4).

2. The magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 1, characterized in that: The outer side of the pipe (12) is also provided with a plurality of air holes (13), and the air holes (13) and the inside of the guide rod (4) form an air passage (14) extending to the air permeable component (3).

3. A magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 1 or 2, characterized in that: At least one groove is provided on the outer surface of the pipe (12), a positioning pin (16) is movably inserted into the interior of the groove via a spring (15), and a positioning hole (17) adapted to the positioning pin (16) is provided on the outer side of the protective sleeve (5).

4. The magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 1, characterized in that: The magnetic attraction component (2) comprises an iron ring (21) installed inside the valve seat (1) and a magnetic ring (22) fixed inside the fixing seat (6).

5. The magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 4, characterized in that: An inner sealing ring (61) is nested on the lower side of the fixed seat (6), and an outer sealing ring (18) is nested on the lower end surface of the valve seat (1).

6. The magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 1, characterized in that: The ventilation component (3) comprises a diaphragm (31), a pressing plate (32) and a cover plate (33) which are installed inside the fixing seat (6); the end surfaces of the pressing plate (32) and the cover plate (33) are both provided with ventilation holes.

7. The magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 1, characterized in that: The guide rod (4) comprises a rod portion (41) and a stopper portion (42) fixedly mounted at the bottom end of the rod portion (41); the rod portion (41) is a hollow tube; a threaded tube is provided below the fixing seat (6); the threaded tube is threadedly connected to the rod portion (41).

8. The magnetically controlled air-permeable explosion-proof valve with a protective structure according to claim 1, characterized in that: At least two mounting wings (19) are provided on the outer side of the valve seat (1), and mounting holes are provided on the end surfaces of the mounting wings (19).

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