A valve body with three-in-one functions of air permeability, pressure relief and explosion prevention

Abstract

The present invention provides a valve body with three-in-one functions of air permeability, pressure relief and explosion prevention, including a shell, a cover body and a valve core, the cover body is detachably connected to the upper end of the shell, a circular shear groove is provided on the baffle, a horizontally arranged baffle is provided in the middle of the shell, a pressure relief spring is sleeved on the valve core, and the two ends of the pressure relief spring are respectively against the baffle and the flange slider. When the internal air pressure of the valve body described in the present invention is relatively low, the gas is directly discharged from the waterproof breathable membrane, when the instantaneous air pressure is relatively high, the gas pushes the valve core to slide outward, squeezes the pressure relief spring, and converts the kinetic energy of the air flow into the elastic potential energy of the pressure relief spring, thereby playing a buffering role for the air flow and realizing rapid pressure relief, when the instantaneous air pressure is too high, the air flow directly impacts the baffle through the air permeable holes on the flange slider while impacting the valve core, and the baffle breaks under the action of the shear groove, thereby increasing the passing area of ​​the gas, and the cover body can prevent the valve core or the baffle from flying out, playing an explosion-proof role.

Description

Technical Field

[0001] The invention belongs to the technical field of battery explosion-proof, and in particular relates to a valve body with three-in-one functions of air permeability, pressure relief and explosion-proof. Background Art

[0002] When the battery is short-circuited or impacted, a large amount of gas will be generated inside the battery. In order to facilitate the timely discharge of gas in the battery and prevent the battery from bursting, an explosion-proof valve is provided on the battery shell to connect the inside of the battery shell with the outside. The explosion-proof valve should have the functions of conventional ventilation, emergency pressure relief and explosion-proof in extreme environments. At present, although there are various explosion-proof devices for the explosion-proof safety of new energy vehicle batteries, they are relatively simple. The application range of ordinary valve bodies is single, and the pressure range cannot be reasonable. It cannot be applied to a large number of power batteries of different types, structures, and models, and it cannot guarantee the reliability of actual machine operation in different seasonal environments. Therefore, how to improve the applicability and stability of existing valve bodies is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0003] In view of this, the present invention aims to provide a valve body with three-in-one functions of air permeability, pressure relief and explosion prevention, so as to increase the applicability and stability of the explosion-proof valve.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A valve body with three-in-one functions of air permeability, pressure relief and explosion prevention, comprising a shell, a cover and a valve core, wherein the cover is detachably connected to the upper end of the shell.

[0006] A horizontally arranged baffle is provided in the middle of the shell, a guide hole is provided in the middle of the baffle, a circular shear groove is provided on the baffle, the valve core passes through the guide hole and slides up and down in the shell along the guide hole in a sealed manner, a cover plate is detachably connected to the upper end of the valve core, a waterproof and breathable membrane is provided between the cover plate and the valve core, a flange slider is detachably connected to the lower end of the valve core, a pressure relief spring is sleeved on the valve core, the two ends of the pressure relief spring are respectively against the baffle and the flange slider, a gas channel is provided in the middle of the valve core and the flange slider, the cover body and the cover plate are both provided with air holes connected to the gas channel, and the flange slider is provided with an air hole connected to the gap between the shell and the valve core.

[0007] Preferably, a plug-in portion is provided at the lower end of the valve core, and a receiving portion corresponding to the plug-in portion is provided on the flange slider, and the plug-in portion and the receiving portion cooperate to adjust the length of the valve core inserted into the flange slider.

[0008] Preferably, the plug-in portion and the receiving portion are provided with corresponding threads.

[0009] Preferably, a limiting flange is provided at the upper end of the valve core, and the limiting flange is detachably connected to the cover plate.

[0010] Preferably, a connecting column is provided on the limiting flange, and a connecting hole corresponding to the connecting column is provided on the cover plate, and the connecting column is connected to the connecting hole by interference fit.

[0011] Preferably, a rubber ring is embedded on a side of the limiting flange close to the baffle.

[0012] Preferably, a slot is provided on the upper side wall of the shell, and a claw corresponding to the slot is provided on the inner wall of the cover.

[0013] Preferably, a sealing boss is provided on the upper section of the shell, and a rubber ring is embedded on the lower surface of the sealing boss.

[0014] Preferably, the side wall of the shell below the sealing boss is provided with an external thread.

[0015] Preferably, the waterproof and breathable membrane is made of polytetrafluoroethylene material.

[0016] Compared with the prior art, the valve body with three-in-one functions of air permeability, pressure relief and explosion prevention described in the present invention has the following advantages:

[0017] When the internal air pressure of the valve body described in the present invention is relatively low, the gas is directly discharged from the waterproof breathable membrane; when the instantaneous air pressure is relatively high, the gas pushes the valve core to slide outward, squeezing the pressure relief spring, and converting the kinetic energy of the airflow into the elastic potential energy of the pressure relief spring, thereby buffering the airflow and achieving rapid pressure relief; when the instantaneous air pressure is too high, the airflow directly impacts the baffle through the air holes on the flange slider while impacting the valve core, and the baffle breaks under the action of the shear groove, thereby increasing the gas passage area, and the cover body can prevent the valve core or the baffle from flying out, thereby playing an explosion-proof role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of a partial cross-sectional structure of a valve body according to an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve body described in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Shell; 2. Cover; 3. Valve core; 4. Baffle; 5. Shear groove; 6. Cover plate; 7. Waterproof breathable membrane; 8. Flange slider; 9. Pressure relief spring; 10. Gas channel; 11. Air vent; 12. Limit flange; 13. Rubber ring. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] A valve body with three-in-one functions of air permeability, pressure relief and explosion prevention, comprising a shell 1, a cover 2 and a valve core 3, wherein the cover 2 is detachably connected to the upper end of the shell 1.

[0028] A horizontally arranged baffle plate 4 is provided in the middle of the shell 1, a guide hole is provided in the middle of the baffle plate 4, a circular shear groove 5 is provided on the baffle plate 4, the valve core 3 passes through the guide hole and slides up and down in the shell 1 along the guide hole in a sealed manner, a cover plate 6 is detachably connected to the upper end of the valve core 3, a waterproof and breathable membrane 7 is provided between the cover plate 6 and the valve core 3, the waterproof and breathable membrane 7 is made of a polymer material with strong acid and alkali corrosion resistance and waterproof and breathable, and the waterproof and breathable membrane 7 in this embodiment is made of polytetrafluoroethylene material, a flange slider 8 is detachably connected to the lower end of the valve core 3, a pressure relief spring 9 is sleeved on the valve core 3, the two ends of the pressure relief spring 9 are respectively against the baffle plate 4 and the flange slider 8, and the pressure relief spring 9 makes the upper end of the valve core 3 always against the upper end of the baffle plate 4, a gas channel 10 is provided in the middle of the valve core 3 and the flange slider 8, the cover body 2 and the cover plate 6 are provided with a vent 11 connected to the gas channel 10, and the flange slider 8 is provided with a vent hole connected to the gap between the shell 1 and the valve core 3 11. When the air flow in the valve body is small and the air pressure is low, the gas passes through the gas channel 10 and the waterproof breathable membrane 7 to be discharged outward. When the air flow in the valve body is large and the air pressure is high, the gas impacts the waterproof breathable membrane 7, drives the valve core 3 to slide outward, squeezes the pressure relief spring 9, and converts the impact force of the air flow into the elastic potential energy of the pressure relief spring 9, which plays a buffering role, thereby achieving pressure relief. When the air flow in the valve body is too high and the atmospheric pressure is too high, the air flow will also pass through the air vents 11 on the flange slider 8 to directly impact the baffle 4. The baffle 4 breaks instantly at the shear groove 5, resulting in cracks, thereby increasing the flow area of ​​the gas. The high-pressure gas is thereby depressurized to prevent the explosion of the protected device. The high-pressure air flow is rapidly ejected to reduce the internal pressure of the protected device. The cover body 2 can block the cover plate 6 and the baffle 4 to prevent damage to the human body under the impact of the air flow, thereby achieving an explosion-proof effect. The air permeability of the waterproof breathable membrane 7 is determined by the volume of the explosion-proof device itself or the chemical properties of the internal material to be protected.

[0029] Preferably, in the present embodiment, a plug-in portion is provided at the lower end of the valve core 3, and a receiving portion corresponding to the plug-in portion is provided on the flange slider 8. The plug-in portion and the receiving portion are provided with corresponding threads. The plug-in portion and the receiving portion cooperate with each other to adjust the length of the valve core 3 inserted into the flange slider 8 through the action of the threads by rotating with each other, that is, changing the tightness of the pressure relief spring 9 to adjust the applicable range of the maximum air pressure.

[0030] Preferably, a limiting flange 12 is provided at the upper end of the valve core 3, and the limiting flange 12 is detachably connected to the cover plate 6. The limiting flange 12 is tightly against the upper end of the baffle 4 to play a limiting role.

[0031] Preferably, the limiting flange 12 is provided with a connecting column, and the cover plate 6 is provided with a connecting hole corresponding to the connecting column, and the connecting column is connected to the connecting hole by interference fit.

[0032] Preferably, a rubber ring 13 is embedded on one side of the limiting flange 12 close to the baffle 4 , which improves the sealing between the limiting flange 12 and the baffle 4 . When the air pressure is low, the gas can only be discharged through the waterproof breathable membrane 7 .

[0033] Preferably, a slot is provided on the upper side wall of the shell 1, and a claw corresponding to the slot is provided on the inner wall of the cover body 2.

[0034] Preferably, a sealing boss is provided on the upper section of the housing 1, and a rubber ring 13 is embedded on the lower surface of the sealing boss, thereby improving the sealing performance between the valve body and the equipment when the valve body is installed on the equipment.

[0035] Preferably, the side wall of the housing 1 below the sealing boss is provided with an external thread for installation with equipment.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve body with three-in-one functions of air permeability, pressure relief and explosion prevention, characterized in that: It includes a shell, a cover and a valve core, wherein the cover is detachably connected to the upper end of the shell. A horizontally arranged baffle is provided in the middle of the shell, a guide hole is provided in the middle of the baffle, a circular shear groove is provided on the baffle, the valve core passes through the guide hole and slides up and down in the shell in a sealed manner along the guide hole, a cover plate is detachably connected to the upper end of the valve core, a waterproof breathable membrane is provided between the cover plate and the valve core, a flange slider is detachably connected to the lower end of the valve core, a pressure relief spring is sleeved on the valve core, the two ends of the pressure relief spring are respectively against the baffle and the flange slider, a gas channel is provided in the middle of the valve core and the flange slider, the cover body and the cover plate are both provided with air holes connected to the gas channel, and the flange slider is provided with an air hole connected to the gap between the shell and the valve core; The lower end of the valve core is provided with a plug-in portion, and the flange slider is provided with a receiving portion corresponding to the plug-in portion, and the plug-in portion and the receiving portion cooperate to adjust the length of the valve core inserted into the flange slider; The upper end of the valve core is provided with a limit flange, and the limit flange is detachably connected to the cover plate; The limiting flange is provided with a connecting column, the cover plate is provided with a connecting hole corresponding to the connecting column, and the connecting column is connected to the connecting hole by interference fit; A slot is provided on the upper side wall of the shell, and a claw corresponding to the slot is provided on the inner wall of the cover; a sealing boss is provided on the upper section of the shell, and a rubber ring is embedded on the lower surface of the sealing boss; an external thread is provided on the side wall of the shell below the sealing boss.

2. The valve body with three-in-one functions of air permeability, pressure relief and explosion prevention according to claim 1, characterized in that: The inserting portion and the receiving portion are provided with corresponding threads.

3. The valve body with three-in-one functions of air permeability, pressure relief and explosion prevention according to claim 1, characterized in that: A rubber ring is embedded on one side of the limiting flange close to the baffle.

4. The valve body with three-in-one functions of air permeability, pressure relief and explosion prevention according to claim 1, characterized in that: The waterproof and breathable membrane is made of polytetrafluoroethylene material.

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