CN114530668B - Explosion-proof valve with waterproof, breathable and moisture-blocking functions and implementation method - Google Patents
Explosion-proof valve with waterproof, breathable and moisture-blocking functions and implementation method Download PDFInfo
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- CN114530668B CN114530668B CN202210432578.9A CN202210432578A CN114530668B CN 114530668 B CN114530668 B CN 114530668B CN 202210432578 A CN202210432578 A CN 202210432578A CN 114530668 B CN114530668 B CN 114530668B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
- H01M50/333—Spring-loaded vent valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/268—Drying gases or vapours by diffusion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses an explosion-proof valve with waterproof, ventilating and moisture-blocking functions and an implementation method, wherein the explosion-proof valve comprises a piston, a valve body, a spring and a bidirectional constant-pressure vent valve, the piston penetrates through the middle part of the valve body and is sleeved with the spring, and the lower end of the piston is in threaded connection with the bidirectional constant-pressure vent valve; the outer side of the two-way constant pressure vent valve is surrounded by a protective cover, a gap is reserved between the protective cover and the valve body, and the end of the protective cover far away from the valve body is a sealing end. The invention integrates explosion-proof pressure relief and moisture resistance and ventilation, and effectively prevents the faults of electric short circuit and the like in the battery pack caused by the water condensation phenomenon.
Description
Technical Field
The invention mainly relates to the technical field of explosion-proof valves, in particular to an explosion-proof valve with waterproof, breathable and moisture-proof functions and an implementation method.
Background
The power battery pack is the heart of the new energy automobile and is used as a core component of the new energy electric automobile, and the safety, the working stability and the reliability of the power battery pack directly affect the whole automobile performance and the running safety of the new energy electric automobile. In order to prevent the performance of a battery pack and a control system in a battery pack from being influenced by water, dust and the like, the power battery pack needs to be sealed, but under the condition of complete sealing, the internal electric core of the power battery generates heat when the power battery is charged, discharged and operated under different working conditions, so that the internal gas of a power battery box expands; when the stop work the temperature reduction will cause the gaseous pressure in the battery box to diminish again, if gaseous unable in time discharge or inhale with the internal and external pressure of balanced box, the battery package reliability will receive serious influence, can produce high temperature high pressure when the unusual blasting appears in electric core in addition, if unable quick pressure release, there is the risk of violent explosion, consequently need explosion-proof valve (or be called the relief valve) to maintain the internal and external pressure balance of box, the damage that the prevention was blasted or was reduced the explosion and produced.
The explosion-proof valve for sealing the box body at present mainly adopts the following methods and technologies:
(1) the explosion-proof piece made of metal or plastic with a nick is used as an explosion-proof element, when certain pressure is reached, the explosion-proof piece is broken to release pressure, but the sealed box body is completely airtight in a normal working state, the internal pressure and the external pressure in the box body are unbalanced after temperature change, the working reliability and the service life of the battery are further influenced, the explosion pressure of the explosion-proof piece is generally large, the pressure range is large when the explosion-proof piece is exploded, the precision is poor, and the technical product still has certain defects;
(2) explosion valve main body frame and protective cover adopt metal material, set up a waterproof ventilated membrane in the framework, adopt the structure setting that the awl end thimble punctures the membrane, played ventilative and explosion-proof effect to a certain extent, but its structure is complicated relatively, explosion-proof leans on ventilated membrane (breathable paper) to take place the deformation arch under the pressure effect and punctures the realization by the toper thimble, the accuracy rate of its blasting is poor, stability is not good, and it is destructive test to detect blast pressure (the blasting is disposable, the diaphragm is punctured the back product and is damaged the losing function), unable full inspection when processing procedure and shipment, consequently, there is great quality risk.
Disclosure of Invention
In order to overcome the technical problems, the invention discloses an explosion-proof valve with waterproof, breathable and moisture-proof functions and an implementation method.
The technical scheme adopted by the invention for realizing the purpose is as follows:
an explosion-proof valve with waterproof, breathable and moisture-blocking functions comprises a piston, a valve body, a spring and a bidirectional constant-pressure breathable valve, wherein the piston comprises a pressure plate, an upper cover, a waterproof and breathable film gasket, a press-fitting ring and a supporting plate;
the pressure plate comprises a cylindrical valve rod and a circular plate at the upper end, the valve rod and the circular plate are of an integral structure, first air holes are uniformly distributed in the side surface of the circular plate, the lower end of the valve rod is of a threaded structure, and the pressure plate is provided with a through hole along the axis of the valve rod;
the upper cover is fixedly arranged at the upper end of the pressure plate, and the supporting plate, the press-fitting ring, the waterproof breathable film and the waterproof breathable film gasket are sequentially arranged between the upper cover and the pressure plate from top to bottom; the supporting plate and the upper cover are welded through ultrasonic waves or hot melting, the second air holes are formed in the supporting plate in a distributed mode, and the press mounting ring is in interference fit with the pressure plate.
The valve rod penetrates through the middle part of the valve body, and the lower end of the valve rod is connected with the bidirectional constant-pressure vent valve through threads; a pressure relief opening penetrating through the valve body is formed in the valve body below the circular plate of the pressure plate, and the circular plate can cover the pressure relief opening when contacting with the valve body; the spring is sleeved between the valve body and the bidirectional constant-pressure vent valve through the valve rod.
Preferably, the middle part of the valve body is provided with a shaft sleeve which is made of Teflon.
Preferably, a first sealing ring is arranged between the valve body and the pressure plate, and the first sealing ring is mounted on the valve body.
Preferably, the lower end of the valve body is provided with a second sealing ring.
Preferably, a protective cover is arranged on the valve body around the outer side of the spring and the bidirectional constant-pressure vent valve, a gap is reserved between the protective cover and the valve body, and a sealing end is arranged at one end, far away from the valve body, of the protective cover.
Preferably, the bidirectional constant-pressure vent valve comprises a vent valve and a locking nut;
the vent valve comprises a vent valve body, an annular rubber sheet is mounted on the vent valve body, a third vent hole is formed in the position, below the annular rubber sheet, of the vent valve body, the position, below the annular rubber sheet is not attached to the vent valve body, a first mounting hole is formed in the middle of the vent valve body, a circular rubber sheet capable of being opened upwards is mounted through the first mounting hole, and a fourth vent hole is formed in the position, below the circular rubber sheet, of the vent valve body;
the upper end of the locking nut is provided with threads matched with the valve rod, a second mounting hole is formed in the lower portion of the locking nut, the vent valve is mounted inside the second mounting hole, an inner wall gradually expanding downwards is arranged on the inner side of the second mounting hole, and the inner wall is attached to the outer edge of the annular rubber sheet to form a one-way vent valve structure.
A method for realizing an explosion-proof valve with waterproof, breathable and moisture-resistant functions comprises the following steps:
when the air pressure inside and outside the sealed box body is balanced, the bidirectional constant-pressure vent valve is in a closed state;
when the external pressure is higher than the internal pressure of the sealed box body and the opening pressure of the bidirectional constant-pressure vent valve is reached, the annular rubber sheet of the bidirectional constant-pressure vent valve bends downwards under the action of pressure difference, a gap is generated between the annular rubber sheet and the inner wall of the locking nut, external air enters the sealed box body through the first air hole in the side face of the circular plate, the second air hole in the supporting plate, the waterproof vent membrane, the through hole in the middle of the pressure plate and the bidirectional constant-pressure vent valve in sequence, and the waterproof vent membrane dehumidifies the entering air; when the pressure is balanced again, the outer edge of the annular rubber sheet is attached to the locking nut again; when the internal pressure of the sealed box body is higher than the external pressure and reaches the opening pressure of the bidirectional constant-pressure vent valve, the circular rubber sheet of the bidirectional constant-pressure vent valve bends upwards under the action of pressure difference, gas can pass through a fourth vent hole in the vent valve body and a gap between the circular rubber sheet and the vent valve body, and at the moment, the gas in the sealed box body is discharged in a path with opposite air inlet; when the pressure is balanced again, the circular rubber sheet closes the fourth air hole again;
when the pressure in the sealed box body rises sharply, the piston is pushed open by the internal gas, so that the rapid pressure relief is realized; after the pressure relief is completed, the piston is restored to the closed state under the action of the spring.
Preferably, when the piston is opened for rapid pressure relief, the protective cover protects the spring and the bidirectional constant-pressure vent valve from direct impact of explosive gas and dust, and optimizes the flow field.
An explosion-proof valve with waterproof, breathable and moisture-proof functions comprises a valve body, a piston and a spring, wherein the piston comprises a pressure plate, an upper cover, a waterproof and breathable film gasket, a press-mounting ring, a supporting plate and an adjusting assembly;
the pressure plate comprises a cylindrical valve rod and a circular plate at the upper end, the valve rod and the circular plate are of an integrated structure, the lower end of the valve rod is of a threaded structure, and the pressure plate is provided with a through hole penetrating along the axis of the valve rod;
the upper cover is fixedly arranged at the upper end of the pressure plate, a fifth air vent is arranged on the upper surface of the upper cover, a first constant-pressure one-way vent valve capable of being opened downwards is arranged on the fifth air vent, and the supporting plate, the press-mounting ring, the waterproof breathable film and the waterproof breathable film gasket are sequentially arranged between the upper cover and the pressure plate from top to bottom; the supporting plate and the upper cover are welded through ultrasonic waves or hot melting, the supporting plate is distributed over the second air holes, and the press mounting ring is in interference fit with the pressure plate;
the valve rod penetrates through the middle part of the valve body, and the lower end of the valve rod is connected with the adjusting assembly through threads; a pressure relief opening penetrating through the valve body is formed in the valve body below the circular plate of the pressure plate, and the circular plate can cover the pressure relief opening when contacting with the valve body; the spring is sleeved between the valve body and the adjusting component through the valve rod; a sixth air hole is formed in the valve body, and a second constant-pressure one-way vent valve capable of being opened upwards is mounted on the sixth air hole; a barrier sheet with certain elasticity is installed below the sixth air hole, and the barrier sheet can be bent to cover the sixth air hole under the action of strong air flow from bottom to top.
Preferably, the middle part of the valve body is provided with a shaft sleeve, and the shaft sleeve is made of Teflon materials.
Preferably, a first sealing ring is arranged between the valve body and the pressure plate, and the first sealing ring is mounted on the valve body.
Preferably, the lower end of the valve body is provided with a second sealing ring.
Preferably, the protection casing is installed in the outside that surrounds the spring in on the valve body, the protection casing is kept away from the one end of valve body is the seal end.
Preferably, the adjusting component comprises a toothed ring and an adjusting nut, the upper part of the toothed ring is fixedly connected with the spring, and the lower part of the toothed ring is provided with a toothed structure; a tooth-shaped structure matched with the toothed ring is arranged above the adjusting nut, and the inner side of the tooth-shaped structure is in threaded connection with the valve rod; the length of the thread section of the valve rod is larger than the height of the adjusting nut.
Preferably, the number of the first constant-pressure one-way vent valves and the second constant-pressure one-way vent valves is one or more, each of the first constant-pressure one-way vent valves and the second constant-pressure one-way vent valves comprises two disks and a thin rod connected to the centers of the two disks, the diameters of the two disks are larger than the radius of the vent hole, and at least two seventh vent holes are formed in one of the disks; the first constant-pressure one-way vent valve and the second constant-pressure one-way vent valve are made of soft materials.
A method for realizing an explosion-proof valve with waterproof, breathable and moisture-proof functions comprises the following steps:
when the air pressure inside and outside the sealed box body is relatively balanced, the piston, the first constant-pressure one-way vent valve and the second constant-pressure one-way vent valve are all in a closed state;
when the external pressure is higher than the internal pressure of the sealed box body and the pressure difference reaches the opening pressure of the first constant-pressure one-way vent valve, the first constant-pressure one-way vent valve is opened downwards under the action of the pressure difference, external air enters the sealed box body through the fifth vent hole, the second vent hole in the supporting plate, the waterproof breathable film and the through hole in the middle of the pressure plate in sequence, and the waterproof breathable film dehumidifies the entering air; when the pressure reaches balance again, the first constant-pressure one-way ventilation valve is closed again;
when the internal pressure of the sealed box body is higher than the external pressure and the pressure difference reaches the opening pressure of the second constant-pressure one-way vent valve, the second constant-pressure one-way vent valve is opened upwards under the action of the pressure difference, and the internal air is discharged through the sixth vent hole; when the pressure is balanced again, the second constant-pressure one-way vent valve is closed again;
rotating the adjusting nut to compress or stretch the spring so as to adjust the opening pressure of the piston; when the pressure in the sealed box body rises sharply, the piston is pushed open by the internal gas, so that the rapid pressure relief is realized; meanwhile, the blocking sheet below the sixth air hole is bent under the action of strong airflow to cover the sixth air hole, so that dust generated by explosion is prevented from blocking the sixth air hole.
Preferably, the adjusting nut is matched with a toothed ring through a toothed structure, and the toothed ring fixes the adjusting nut.
Preferably, when the piston is opened for rapid pressure relief, the protective cover outside the spring protects the adjusting nut, the toothed ring, the spring and the air inlet channel from direct impact of explosive gas and dust, and optimizes the exhaust flow field.
The beneficial effects of the invention are:
1. when the air pressure inside and outside the sealed box body is relatively balanced, the constant-pressure vent valve is closed to prevent the air inside and outside from repeatedly circulating, so that the water condensation phenomenon caused in the long-term use process of the inside of the sealed box body is avoided, and the faults of electric short circuit and the like caused by the water condensation phenomenon in the battery pack are prevented; meanwhile, the waterproof breathable film is prevented from being consumed too fast in circulating air flow for a long time, and the replacement time of the waterproof breathable film is prolonged.
2. When the pressure of the sealing box body rises suddenly due to emergency, the piston is pushed open by internal gas, so that rapid pressure relief is realized, and the phenomenon that the internal pressure of the sealing box body is overlarge and explodes due to the fact that the ventilation efficiency of the existing breather valve is not high is avoided.
3. When explosion happens inside the sealed box body, the protective cover protects the spring and the bidirectional constant-pressure vent valve from direct impact of explosive gas and dust, and optimizes a flow field to ensure smooth exhaust.
4. After the pressure relief is completed, the piston can be restored to a closed state under the action of the spring, and the function is not influenced.
5. In embodiment 2, the adjusting nut is rotated to compress or stretch the spring, so that the opening pressure of the piston is adjusted, different explosion-proof pressures can be conveniently selected according to actual conditions, and the device is suitable for various working environments.
6. In embodiment 2, when the internal pressure of the sealed box is higher than the external pressure by a certain value, only the second constant pressure one-way vent valve is opened under the action of pressure difference, the internal air is discharged through the sixth vent hole, and the gas discharged in the process does not pass through the waterproof breathable film, so that the consumption of the waterproof breathable film is greatly reduced, and the replacement time of the waterproof breathable film is prolonged.
7. In embodiment 2, when the inside of the sealed box body explodes, the first constant-pressure one-way vent valve is in a closed state, the blocking piece blocks the gas with the explosion dust from being discharged through the sixth vent hole, so that the dust is prevented from blocking the air inlet channel and the sixth vent hole which are formed by the first vent hole, the waterproof vent film, the second vent hole and the through hole on the connecting rod, and the protective cover prevents the explosion dust from directly impacting the adjusting component, the spring and the air inlet channel, so that the explosion-proof air-permeable box can still normally work after experiencing an explosion environment, and the cleaning difficulty after explosion is reduced; meanwhile, the surface of the protective cover is regular and smooth, so that a flow field is stable when high-pressure gas flows at a high speed, and the gas is smoothly exhausted.
8. The invention integrates the functions of moisture resistance, water resistance, ventilation and explosion prevention, and realizes multiple functions of one valve.
Drawings
FIG. 1 is a perspective view of an explosion-proof valve with waterproof, air-permeable and moisture-proof functions according to the present invention;
FIG. 2 is an exploded view of an explosion-proof valve with waterproof, breathable and moisture-proof functions according to the present invention;
fig. 3 is an internal structural view of an explosion-proof valve with waterproof, breathable and moisture-proof functions according to embodiment 1 of the invention;
fig. 4 is an internal structural view of an explosion-proof valve with waterproof, air-permeable and moisture-proof functions according to embodiment 2 of the invention;
fig. 5 is another internal structure diagram of the explosion-proof valve with waterproof, air-permeable and moisture-proof functions according to embodiment 2 of the present invention.
In the figure: 1 piston, 101 upper cover, 102 supporting plate, 103 press-fitting ring, 104 waterproof breathable film, 105 waterproof breathable film gasket, 106 pressure plate, 107 first constant pressure one-way breathable valve, 2 first sealing ring, 3 shaft sleeve, 4 valve body, 401 second constant pressure one-way breathable valve, 402 barrier sheet, 5 spring, 6 protective cover, 7 second sealing ring, 8 two-way constant pressure breathable valve, 810 breathable valve, 811 breathable valve body, 812 annular rubber sheet, 813 circular rubber sheet, 820 locking nut, 9 adjusting component, 901 toothed ring and 902 adjusting nut.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to facilitate the understanding and appreciation of the inventive concepts herein, and are not intended to be limiting thereof.
Example 1:
referring to fig. 1 to 3, the explosion-proof valve with waterproof, air-permeable and moisture-proof functions comprises a piston 1, a valve body 4, a spring 5 and a bidirectional constant-pressure vent valve 8, wherein the piston 1 penetrates through the middle part of the valve body 4 and is sleeved with the spring 5, and the lower end of the piston is in threaded connection with the bidirectional constant-pressure vent valve 8. First sealing washer 2 is installed to the upper end of valve body 4, and second sealing washer 7 is installed to the lower extreme, and the axle sleeve 3 of special fluorine dragon material is installed to the centre, lets the motion of valve rod in valve body 4 more smooth, reduces the risk of jamming, installs protection casing 6 on valve body 4 around the outside of spring 5 and two-way level pressure breather valve 8, leaves the gap between protection casing 6 and the valve body 4, and the one end that valve body 4 was kept away from to protection casing 6 is the seal end.
The piston 1 comprises an upper cover 101, a supporting plate 102, a press mounting ring 103, a waterproof breathable film 104, a waterproof breathable film gasket 105 and a pressure plate 106; the pressure plate 106 comprises a cylindrical valve rod and a circular plate at the upper end of the valve rod, the valve rod and the circular plate are of an integrated structure, first air holes are uniformly distributed in the side surface of the circular plate, the lower end of the valve rod is of a threaded structure, the valve rod penetrates through the middle of the valve body 4, and a penetrating through hole is formed in the pressure plate 106 along the axis of the valve rod; the upper cover 101 is fixedly arranged at the upper end of the pressure plate 106, a supporting plate 102, a press-fitting ring 103, a waterproof breathable film 104 and a waterproof breathable film gasket 105 are sequentially arranged between the upper cover 101 and the pressure plate 106 from top to bottom, the supporting plate 102 and the upper cover 101 are welded in an ultrasonic mode or a hot-melt mode, the supporting plate 102 is used for ensuring that the upper cover 101 and the pressure plate 106 are kept in a separated state, and the supporting plate 102 is distributed over the second breathable holes; an annular waterproof breathable film gasket 105 is concentrically arranged below the waterproof breathable film 104 and used for preventing the waterproof breathable film 104 from being damaged due to direct contact with a lower pressure plate 106; a press mounting ring 103 is concentrically arranged above the waterproof breathable film 104 and used for fixing the waterproof breathable film 104 to prevent falling off.
The valve rod of pressure plate 106 runs through the middle part of valve body 4, and the circular plate below of pressure plate 106 is seted up the pressure release mouth that runs through the valve body on valve body 4, can cover the pressure release mouth when circular plate and valve body 4 contact. The lower end is connected with the bidirectional constant pressure vent valve 8 through threads, and a spring 5 is sleeved between the valve body 4 and the bidirectional constant pressure vent valve 8 through a valve rod.
The two-way constant-pressure vent valve 8 comprises a vent valve 810 and a locking nut 820, the vent valve 810 comprises a vent valve body 811, an annular rubber sheet 812 is installed on the vent valve body 811, a third vent hole is formed in the vent valve body 811 below the annular rubber sheet 812, the lower side of the annular rubber sheet 812 is not attached to the vent valve body 811, a first installation hole is formed in the middle of the vent valve body 811, a circular rubber sheet 813 capable of being opened upwards is installed through the first installation hole, and a fourth vent hole is formed in the vent valve body 811 below the circular rubber sheet 813. The upper end of the locking nut 820 is provided with threads matched with the valve rod of the pressure plate 106, a second mounting hole is formed in the lower portion of the locking nut 820, the vent valve 810 is mounted inside the second mounting hole, the inner side of the second mounting hole is provided with an inner wall which gradually expands downwards and outwards, and the inner wall is attached to the outer edge of the annular rubber sheet 812.
Under the normal operating condition, when the inside and outside atmospheric pressure relative balance of seal box, inside and outside pressure differential is not enough to open two-way level pressure ventilation valve 8, and the inside and outside gas of box can not circulate promptly to avoid leading to the water phenomenon of congealing in long-term use, prevent to take place troubles such as electric short circuit because congealing in the battery package that the water phenomenon leads to, reduce the consumption of waterproof ventilated membrane 104 simultaneously. At this time, the invention plays a role of moisture resistance.
Under a normal working state, when the external pressure is higher than the internal pressure of the sealed box body by a certain numerical value, the annular rubber sheet 812 of the two-way constant-pressure vent valve 8 bends downwards under the action of pressure difference, a gap is generated between the annular rubber sheet 812 and the inner wall of the locking nut 820, the external air sequentially passes through the first vent hole on the side surface of the circular plate, the second vent hole on the supporting plate 102, the waterproof vent film 104, the through hole in the middle of the pressure plate 106 and the gap between the annular rubber sheet 812 and the inner wall of the locking nut 820 to enter the sealed box body, and the waterproof vent film 104 dehumidifies the entered air; when the pressure is again balanced, the outer edge of the annular rubber sheet 812 is re-attached to the locking nut 820; when the internal pressure of the sealed box body is higher than the external pressure by a certain value, the circular rubber sheet 813 of the bidirectional constant-pressure vent valve 8 bends upwards under the action of pressure difference, gas can pass through the fourth vent hole in the vent valve body 811 and the gap between the circular rubber sheet 813 and the vent valve body 811, and the gas in the sealed box body is discharged in an opposite path; when the pressure is again balanced, the circular rubber sheet 813 closes the fourth vent hole again. The invention now functions as a breather valve.
When the pressure in the sealed box body rises sharply due to an emergency, the piston 1 is pushed open by the internal gas, so that the rapid pressure relief is realized, and the explosion caused by the overlarge pressure in the sealed box body is prevented; the protective cover 6 protects the spring 5 and the bidirectional constant-pressure vent valve 8 from direct impact of explosive gas and dust, and optimizes a flow field to ensure smooth exhaust; after the pressure relief is finished, the piston 1 is restored to the closed state under the action of the spring 5. At this time, the present invention functions as an explosion-proof valve.
Example 2:
referring to fig. 1, 2, 4, and 5, the explosion-proof valve with waterproof, air-permeable, and moisture-blocking functions provided in this embodiment includes a valve body 4, and a shaft sleeve 3 made of teflon is installed in the middle of the valve body 4, so that the valve rod moves more smoothly in the valve body 4, and the risk of jamming is reduced; the middle part of the shaft sleeve 3 is penetrated with a valve rod, the upper end of the valve rod is fixed with a circular plate, and the valve rod and the circular plate are of an integrated structure to jointly form a pressure plate 106. The pressure plate 106 has a pressure relief opening through the valve body 4 below the circular plate, and the pressure relief opening is covered by the circular plate when the circular plate contacts the valve body 4. A first sealing ring 2 is arranged between the pressure plate 106 and the valve body 4, and the first sealing ring 2 is fixed on the valve body 4 and used for preventing air leakage between the valve body 4 and the pressure plate 106; an upper cover 101 is fixedly connected to the upper end of the pressure plate 106, a supporting plate 102, a press-fitting ring 103, a waterproof breathable film 104 and a waterproof breathable film gasket 105 are sequentially arranged between the upper cover 101 and the pressure plate 106 from top to bottom, the supporting plate 102 and the upper cover 101 are welded in an ultrasonic mode or a hot-melt mode, second air holes are formed in the supporting plate 102 in a distributed mode, and the press-fitting ring 103 is in interference fit with the pressure plate 106; the spring 5 is sleeved below the valve body 4 through the valve rod, the lower end of the spring 5 is fixedly connected with the toothed ring 901, the adjusting nut 902 is arranged below the toothed ring 901, the upper end of the adjusting nut 902 is of a toothed structure and matched with the toothed ring 901, the adjusting nut 902 is in threaded connection with the valve rod, the length of threads on the valve rod is larger than the height of the adjusting nut 902, the spring 5 can be compressed or stretched by rotating the adjusting nut 902, so that the opening pressure of the piston 1 can be adjusted, and the toothed ring 901 plays a role in fixing the adjusting nut 902.
The upper cover 101 is provided with a fifth air hole, and a first constant-pressure one-way vent valve 107 which can be opened downwards is arranged on the fifth air hole; the pressure plate 106 is provided with a through hole along the axis of the valve rod, and outside air can enter the sealed box body through the fifth air hole, the second air hole on the supporting plate 102, the waterproof breathable film 104 and the through hole in the middle of the pressure plate 106 in sequence; a sixth air hole is formed in the valve body 4, a second constant-pressure one-way vent valve 401 capable of being opened upwards is installed on the sixth air hole, and gas inside the sealed box body can be discharged through the sixth air hole.
The first constant-pressure one-way vent valve 107 and the second constant-pressure one-way vent valve 401 are made of soft materials and comprise two disks and a thin rod connected to the centers of the two disks, the diameters of the two disks are larger than the radius of the vent hole, and at least two seventh vent holes are formed in one disk. The number of the first constant pressure one-way vent valve 107 and the second constant pressure one-way vent valve 401 can be one or more. When the air pressure at one side of the seventh air hole is larger, the air pushes the disc at the other side through the seventh air hole, and the air passes through the disc, and when the air pressure at the other side is larger, the air is blocked by the disc without holes and cannot pass through the disc without holes.
A protective cover 6 is arranged on the valve body 4 around the outer side of the spring 5, one end of the protective cover 6, which is far away from the valve body 4, is a sealing end, and a ventilating gap is formed between the protective cover 6 and the valve body 4; a blocking sheet 402 with certain elasticity is arranged below the sixth vent hole, and the blocking sheet 402 can be bent to cover the sixth vent hole under the action of strong airflow from bottom to top.
Under a normal working state, when the air pressure inside and outside the sealed box body is relatively balanced, the internal and external pressure difference is not enough to open the first constant-pressure one-way vent valve 107 and the second constant-pressure one-way vent valve 401, namely, the air inside and outside the box body can not circulate, so that the water condensation phenomenon caused in the long-term use process is avoided, the faults of electrical short circuit and the like in the battery pack caused by the water condensation phenomenon are prevented, and the humidity resistance effect is realized;
under a normal working state, when the external pressure is higher than the internal pressure of the sealed box body by a certain numerical value, the first constant-pressure one-way vent valve 107 is opened under the action of pressure difference, external air enters the sealed box body through the fifth vent hole, the second vent hole in the supporting plate 102, the waterproof vent film 104 and the through hole in the middle of the pressure plate 106 in sequence, and the waterproof vent film 104 dehumidifies the entered air; when the pressure is balanced again, the first constant-pressure one-way vent valve 107 is closed again, and the waterproof vent valve plays a role at the moment;
under a normal working state, when the internal pressure of the sealed box body is higher than the external pressure by a certain numerical value, the second constant-pressure one-way vent valve 401 is opened under the action of pressure difference, the internal air is discharged through the sixth vent hole, and the discharged air does not pass through the waterproof breathable film 104, so that the discharged air cannot be dehumidified by the waterproof breathable film 104; when the pressure is balanced again, the second constant-pressure one-way vent valve 401 is closed again, and the air vent valve plays a role at the moment;
when the pressure in the sealed box body rises sharply due to an emergency, the piston 1 is pushed open by the internal gas, so that the rapid pressure relief is realized, and the explosion caused by the overlarge pressure in the sealed box body is prevented; meanwhile, the barrier sheet 402 below the sixth vent bends under the action of strong airflow to cover the sixth vent, so as to prevent dust generated by explosion from blocking the sixth vent. The protective cover 6 protects the regulating component 9, the spring 5 and the air inlet channel from direct impact of explosive gas and dust, optimizes the flow field and enables air exhaust to be smooth.
The present invention has been described in detail with reference to the preferred embodiments thereof, and it should be understood that the present invention is not limited thereto, but includes any modifications, equivalents, and improvements within the spirit and scope of the present invention.
Claims (14)
1. The utility model provides an explosion-proof valve with waterproof ventilative wet function that hinders, includes piston, valve body, spring, two-way level pressure ventilation valve, its characterized in that: the piston comprises a pressure plate, an upper cover, a waterproof breathable film gasket, a press mounting ring and a supporting plate;
the pressure plate comprises a cylindrical valve rod and a circular plate at the upper end, the valve rod and the circular plate are of an integrated structure, first air holes are uniformly distributed in the side surface of the circular plate, the lower end of the valve rod is of a threaded structure, and the pressure plate is provided with a through hole along the axis of the valve rod;
the upper cover is fixedly arranged at the upper end of the pressure plate, and the supporting plate, the press-mounting ring, the waterproof breathable film and the waterproof breathable film gasket are sequentially arranged between the upper cover and the pressure plate from top to bottom; the supporting plate and the upper cover are welded through ultrasonic waves or hot melting, the supporting plate is distributed over the second air holes, and the press mounting ring is in interference fit with the pressure plate;
the valve rod penetrates through the middle part of the valve body, and the lower end of the valve rod is connected with the bidirectional constant-pressure vent valve through threads; a pressure relief opening penetrating through the valve body is formed in the valve body below the circular plate of the pressure plate, and the circular plate can cover the pressure relief opening when contacting with the valve body; the spring is sleeved between the valve body and the bidirectional constant-pressure vent valve through the valve rod;
the bidirectional constant-pressure vent valve comprises a vent valve and a locking nut;
the vent valve comprises a vent valve body, an annular rubber sheet is mounted on the vent valve body, a third vent hole is formed in the position, below the annular rubber sheet, of the vent valve body, the position, below the annular rubber sheet is not attached to the vent valve body, a first mounting hole is formed in the middle of the vent valve body, a circular rubber sheet capable of being opened upwards is mounted through the first mounting hole, and a fourth vent hole is formed in the position, below the circular rubber sheet, of the vent valve body;
the upper end of the locking nut is provided with a thread matched with the valve rod, a second mounting hole is formed below the locking nut, the vent valve is mounted inside the second mounting hole, the inner side of the second mounting hole is provided with an inner wall gradually expanding downwards, and the inner wall is attached to the outer edge of the annular rubber sheet to form a one-way vent valve structure;
and a protective cover is arranged on the valve body around the outer sides of the spring and the bidirectional constant-pressure vent valve, a gap is reserved between the protective cover and the valve body, and the end, far away from the valve body, of the protective cover is a sealing end.
2. The explosion-proof valve with the functions of water prevention, ventilation and moisture resistance as claimed in claim 1, wherein a shaft sleeve is installed in the middle of the valve body, and the shaft sleeve is made of Teflon material.
3. The explosion-proof valve with waterproof, air-permeable and moisture-proof functions as claimed in claim 1, wherein a first sealing ring is arranged between the valve body and the pressure plate, and the first sealing ring is mounted on the valve body.
4. The explosion-proof valve with the functions of water prevention, air permeation and moisture resistance as recited in claim 1, wherein a second sealing ring is installed at the lower end of the valve body.
5. A method for realizing an explosion-proof valve with waterproof, breathable and moisture-proof functions, which is applied to the explosion-proof valve as claimed in any one of claims 1 to 4, and comprises the following steps:
when the air pressure inside and outside the sealed box body is balanced, the bidirectional constant-pressure vent valve is in a closed state;
when the external pressure is higher than the internal pressure of the sealed box body and reaches the opening pressure of the bidirectional constant-pressure vent valve, the annular rubber sheet of the bidirectional constant-pressure vent valve bends downwards under the action of pressure difference, a gap is generated between the annular rubber sheet and the inner wall of the locking nut, external air sequentially passes through the first air hole in the side surface of the circular plate, the second air hole in the supporting plate, the waterproof vent membrane, the through hole in the middle of the pressure plate and the bidirectional constant-pressure vent valve to enter the sealed box body, and the waterproof vent membrane dehumidifies the entered air; when the pressure is balanced again, the outer edge of the annular rubber sheet is attached to the locking nut again; when the internal pressure of the sealed box body is higher than the external pressure and reaches the opening pressure of the bidirectional constant-pressure vent valve, the circular rubber sheet of the bidirectional constant-pressure vent valve bends upwards under the action of pressure difference, gas can pass through a fourth vent hole in the vent valve body and a gap between the circular rubber sheet and the vent valve body, and at the moment, the gas in the sealed box body is discharged in a path with opposite air inlet; when the pressure is balanced again, the round rubber sheet closes the fourth air hole again;
when the pressure in the sealed box body rises sharply, the piston is pushed open by the internal gas, so that the rapid pressure relief is realized; after the pressure relief is completed, the piston is restored to the closed state under the action of the spring.
6. The method for realizing the explosion-proof valve with the functions of water prevention, air permeation and moisture resistance as claimed in claim 5, wherein when the piston is opened for rapid pressure relief, the protection cover protects the spring and the bidirectional constant pressure vent valve from direct impact of explosive gas and dust, and optimizes the flow field.
7. The utility model provides an explosion-proof valve with waterproof ventilative wet function that hinders, includes valve body, piston, spring, its characterized in that: the piston comprises a pressure plate, an upper cover, a waterproof breathable film gasket, a press mounting ring, a supporting plate and an adjusting assembly;
the pressure plate comprises a cylindrical valve rod and a circular plate at the upper end, the valve rod and the circular plate are of an integrated structure, the lower end of the valve rod is of a threaded structure, and the pressure plate is provided with a through hole penetrating along the axis of the valve rod;
the upper cover is fixedly arranged at the upper end of the pressure plate, a fifth air vent is arranged on the upper cover, a first constant-pressure one-way vent valve capable of being opened downwards is arranged on the fifth air vent, and the supporting plate, the press-mounting ring, the waterproof breathable film and the waterproof breathable film gasket are sequentially arranged between the upper cover and the pressure plate from top to bottom; the supporting plate and the upper cover are welded in an ultrasonic mode or a hot melting mode, the supporting plate is distributed on the second air holes, and the press-fitting ring is in interference fit with the pressure plate;
the valve rod penetrates through the middle part of the valve body, and the lower end of the valve rod is connected with the adjusting assembly through threads; a pressure relief opening penetrating through the valve body is formed in the valve body below the circular plate of the pressure plate, and the circular plate can cover the pressure relief opening when contacting with the valve body; the spring is sleeved between the valve body and the adjusting component through the valve rod; a sixth air hole is formed in the valve body, and a second constant-pressure one-way vent valve capable of being opened upwards is mounted on the sixth air hole; a blocking sheet with certain elasticity is arranged below the sixth air hole, and the blocking sheet can be bent to cover the sixth air hole under the action of strong air flow from bottom to top;
a protective cover is arranged on the valve body around the outer side of the spring, and one end of the protective cover, which is far away from the valve body, is a sealing end;
the adjusting component comprises a toothed ring and an adjusting nut, the upper part of the toothed ring is fixedly connected with the spring, and a toothed structure is arranged below the toothed ring; a tooth-shaped structure matched with the toothed ring is arranged above the adjusting nut, and the inner side of the tooth-shaped structure is in threaded connection with the valve rod; the length of the thread section of the valve rod is larger than the height of the adjusting nut.
8. The explosion-proof valve with the functions of water prevention, air permeation and moisture resistance as claimed in claim 7, wherein a shaft sleeve is installed in the middle of the valve body, and the shaft sleeve is made of Teflon.
9. The explosion-proof valve with waterproof, air-permeable and moisture-proof functions as claimed in claim 7, wherein a first sealing ring is arranged between the valve body and the pressure plate, and the first sealing ring is mounted on the valve body.
10. The explosion-proof valve with the functions of water prevention, air permeation and moisture resistance as claimed in claim 7, wherein a second sealing ring is installed at the lower end of the valve body.
11. The explosion-proof valve with the functions of water prevention, air permeation and moisture resistance as claimed in claim 7, wherein the number of the first constant-pressure one-way vent valve and the second constant-pressure one-way vent valve is one or more, each of the first constant-pressure one-way vent valve and the second constant-pressure one-way vent valve comprises two disks and a thin rod connected to the centers of the two disks, the diameters of the two disks are larger than the radius of the vent hole, and at least two seventh vent holes are arranged on one disk; the first constant-pressure one-way vent valve and the second constant-pressure one-way vent valve are made of soft materials.
12. A method for realizing an explosion-proof valve with waterproof, air-permeable and moisture-blocking functions, which is applied to the explosion-proof valve as claimed in any one of claims 7 to 11, and comprises the following steps:
when the air pressure inside and outside the sealed box body is relatively balanced, the piston, the first constant-pressure one-way vent valve and the second constant-pressure one-way vent valve are all in a closed state;
when the external pressure is higher than the internal pressure of the sealed box body and the pressure difference reaches the opening pressure of the first constant-pressure one-way vent valve, the first constant-pressure one-way vent valve is opened downwards under the action of the pressure difference, external air enters the sealed box body through the fifth vent hole, the second vent hole in the supporting plate, the waterproof vent film and the through hole in the middle of the pressure plate in sequence, and the waterproof vent film dehumidifies the air entering the sealed box body; when the pressure is balanced again, the first constant-pressure one-way ventilation valve is closed again;
when the internal pressure of the sealed box body is higher than the external pressure and the pressure difference reaches the opening pressure of the second constant-pressure one-way vent valve, the second constant-pressure one-way vent valve is opened upwards under the action of the pressure difference, and the internal air is discharged through the sixth vent hole; when the pressure reaches balance again, the second constant-pressure one-way vent valve is closed again;
rotating the adjusting nut to compress or stretch the spring so as to adjust the opening pressure of the piston; when the pressure in the sealed box body rises sharply, the piston is pushed open by the internal gas, so that the rapid pressure relief is realized; meanwhile, the blocking sheet below the sixth air hole is bent under the action of strong airflow to cover the sixth air hole, so that dust generated by explosion is prevented from blocking the sixth air hole.
13. The method for realizing the explosion-proof valve with the functions of water resistance, air permeability and moisture resistance as claimed in claim 12, wherein the adjusting nut is matched with the toothed ring through a toothed structure, and the toothed ring fixes the adjusting nut.
14. The method for realizing an explosion-proof valve with waterproof, air-permeable and moisture-proof functions according to claim 12, characterized in that when the piston is opened for rapid decompression, a protective cover outside the spring protects the adjusting nut, the toothed ring, the spring and the air inlet channel from direct impact of explosive gas and dust, and optimizes the exhaust flow field.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432578.9A CN114530668B (en) | 2022-04-24 | 2022-04-24 | Explosion-proof valve with waterproof, breathable and moisture-blocking functions and implementation method |
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| CN202210432578.9A CN114530668B (en) | 2022-04-24 | 2022-04-24 | Explosion-proof valve with waterproof, breathable and moisture-blocking functions and implementation method |
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| CN114530668B true CN114530668B (en) | 2022-07-15 |
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| JP2019173812A (en) * | 2018-03-27 | 2019-10-10 | Smk株式会社 | Explosion-proof valve, housing constructional element, manufacturing method of explosion-proof valve, and manufacturing method of housing constructional element |
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