CN111779866A - Novel explosion-proof balanced valve - Google Patents
Novel explosion-proof balanced valve Download PDFInfo
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- CN111779866A CN111779866A CN202010747655.0A CN202010747655A CN111779866A CN 111779866 A CN111779866 A CN 111779866A CN 202010747655 A CN202010747655 A CN 202010747655A CN 111779866 A CN111779866 A CN 111779866A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
- F16K17/19—Equalising valves predominantly for tanks
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses a novel explosion-proof balance valve, which comprises: the spring is arranged between the guide rod and the body, the guide rod is provided with a through hole, the through hole is communicated with a first air vent of the piston to form an air vent channel, the piston is further provided with a waterproof air-permeable membrane for covering the first air vent, the other end of the guide rod is provided with a constant-pressure air-permeable assembly, and the constant-pressure air-permeable assembly is plugged in the through hole; the body is arranged on the sealed box body and forms sealing contact, and the guide rod and the constant-pressure ventilation assembly are arranged in the sealed box body; in a normal working state, when the internal pressure and the external pressure of the sealed box body are balanced and the pressure difference is less than the opening pressure of the constant-pressure ventilation assembly, the through hole on the guide rod is completely sealed; when the internal and external pressure difference is larger than the opening pressure of the constant-pressure ventilation assembly, the through holes on the guide rods are communicated for ventilation, and the internal and external pressures in the sealed box body are balanced.
Description
The technical field is as follows:
the invention relates to the technical field of explosion-proof valves, in particular to a novel explosion-proof balance valve.
Background art:
under the trend of automobile electromotion, the quantity of electric vehicles in China is rapidly increased, but meanwhile, the accidents of electric vehicles burning on fire frequently occur, and the safety problem of the electric vehicles becomes the focus of attention of consumers and is the fundamental guarantee of the continuous and healthy development of the new energy automobile industry. For this reason, electric mandatory national standards such as electric automobile safety requirement, electric automobile power storage battery safety requirement and the like are newly issued by related departments and are implemented at 1 month and 1 day of 2021, wherein the electric automobile safety requirement is mainly stipulated, and the electric automobile waterproof, insulation resistance and monitoring requirements are strengthened so as to reduce the safety risk of the automobile under the conditions of normal use, wading and the like; the safety requirements of the power storage battery for the electric automobile are emphasized by the standard, the thermal safety, the electrical safety and the functional safety requirements of a battery system are strengthened, and particularly, the thermal diffusion test and the waterproof requirements of the battery gas system are increased by the new standard. Aiming at the release and implementation of the mandatory national standards, higher requirements are put forward on the waterproof, ventilation, moisture resistance and the like of the new energy automobile power system.
The power system (battery PACK, electric control, motor and the like) of the electric vehicle is used as the core of the new energy electric vehicle, and the safety and the working reliability of the electric vehicle are very important. In order to ensure the safe and stable work, the water-proof and dust-proof are needed, that is, the sealing is theoretically needed, but in a completely sealed state, once the internal short circuit, the battery overcharge or overdischarge and other abnormal thermal runaway occur, a large amount of high temperature and high pressure are generated, a large amount of solid-gas mixture containing solid or colloidal substances is generated, and if the solid-gas mixture cannot be discharged in time, severe fire and explosion occur under the normal condition, so that serious casualties and property loss are caused.
Therefore, at present, the scheme of installing 1 or more waterproof vent valves and explosion-proof vent balance valves on power system components such as a battery pack and the like is adopted to carry out waterproof and explosion-proof on the power battery system, and casualties and property loss caused by explosion are prevented or reduced. However, the waterproof breathable microporous membrane is arranged inside the waterproof breathable valve and the explosion-proof valve in the prior art, although liquid water can be prevented from entering the box body, the waterproof breathable microporous membrane has a good breathable pressure balancing function and provides certain protection for the electric vehicle, when the waterproof breathable microporous membrane is breathable, water vapor in the air can enter a power control system along with the water vapor, a large amount of moisture enters the power control system and can be condensed to reduce the insulation resistance, even the moisture is short-circuited, serious potential safety hazards exist, and the requirements of new national standards on waterproofness and insulation cannot be met. Although the electrolytic water dehumidifying device or the moisture absorption preventing agent is additionally arranged in the box body to prevent condensation to a certain extent, the electrolytic water dehumidifying device consumes power, and particularly, when the electric vehicle is parked for a long time, a large amount of power consumption can cause over-discharge of the battery, so that the service life of the battery is reduced; and the desiccant and the moisture absorption film/paper placed in the box body are easy to absorb moisture to reach saturation, the service life is short, and the desiccant and the moisture absorption film/paper need to be frequently replaced, so that the prior art still has certain problems.
Therefore, the present inventors propose the following technical solutions for further research and improvement of the existing waterproof, breathable and explosion-proof valve.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide a novel explosion-proof balance valve.
In order to solve the technical problems, the invention adopts the following technical scheme: this novel explosion-proof balanced valve includes: the spring is arranged between the guide rod and the body, the guide rod is provided with a through hole, the through hole is communicated with a first air vent of the piston to form an air vent channel, the piston is further provided with a waterproof air-permeable membrane for covering the first air vent, the other end of the guide rod is provided with a constant-pressure air-permeable assembly, and the constant-pressure air-permeable assembly is plugged in the through hole; the body is arranged on the sealed box body and forms sealing contact, and the guide rod and the constant-pressure ventilation assembly are arranged in the sealed box body; in a normal working state, when the internal pressure and the external pressure of the sealed box body are balanced and the pressure difference is less than the opening pressure of the constant-pressure ventilation assembly, the through hole on the guide rod is completely sealed; when the internal and external pressure difference is larger than the opening pressure of the constant-pressure ventilation assembly, the through holes on the guide rods are communicated for ventilation, and the internal and external pressures in the sealed box body are balanced.
Furthermore, among the above-mentioned technical scheme, the ventilative subassembly of level pressure sets up in the first piece and the second piece that wets that hinders of this mounting panel both sides face including the mounting panel that is fixed in this guide arm other end and laminating, is provided with the second bleeder vent and the third bleeder vent that run through on this mounting panel, and this first piece that wets covers the second bleeder vent, and this second piece that wets covers the third bleeder vent.
Further, in the above technical solution, the first moisture-blocking sheet and the second moisture-blocking sheet are fixed to the mounting plate by fixing members.
Further, in the above technical solution, the first moisture-blocking sheet is further provided with a first pressing sheet, and the first pressing sheet is fixedly connected with the fixing member; and the second moisture-resisting sheet is also provided with a second pressing sheet which is fixedly connected with the fixing piece.
Furthermore, in the above technical solution, the first moisture-blocking sheet and the second moisture-blocking sheet are both circular, and the centers of the first moisture-blocking sheet and the second moisture-blocking sheet are fixed to the mounting plate through the first fixing member and the second fixing member, respectively.
Furthermore, in the above technical solution, a hole is provided in the center of the body for the guide rod to pass through, and a plurality of through exhaust holes are provided in the periphery of the hole of the body, and the piston blocks the exhaust holes under the action of the spring.
Furthermore, in the above technical solution, the front and rear end faces of the body are respectively provided with a first groove and a second groove, the first seal ring and the second seal ring are installed in the first groove and the second groove through interference fit, the inner side and the outer side of the first seal ring are respectively formed with a plurality of first convex hulls and second convex hulls, and the first seal ring partially protrudes out of the front side face of the body and is in abutting contact with the surface of the sealed box body, so that the body is in sealing contact with the sealed box body; the piston is pressed against the second sealing ring.
Further, in the above technical solution, the guide rod and the piston are fixedly connected by a thread.
Further, among the above-mentioned technical scheme, the piston is provided with first mounting groove, waterproof ventilated membrane installs in this first mounting groove, and first mounting groove internal fixation has a clamping ring, and this clamping ring is pressed on this waterproof ventilated membrane edge.
Further, among the above-mentioned technical scheme, be fixed with the apron on the piston, this apron lid is equipped with the ventilative groove of intercommunication on this first mounting groove, and is formed with the clearance between this apron and the body.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: the invention integrates the functions of explosion prevention, pressure relief, internal and external pressure difference of the ventilated balance sealed box body, moisture obstruction and the like, has simple structure and lower cost, and is easy to realize batch production, popularization and application.
Description of the drawings:
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of another aspect of the present invention;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is a perspective view of the present invention with the cover plate removed;
FIG. 6 is a perspective view of a first construction of a constant pressure breather assembly in accordance with the present invention;
FIG. 7 is an exploded perspective view of a first construction of a constant pressure vent assembly in accordance with the present invention;
FIG. 8 is a perspective view of a second construction of a constant pressure breather assembly in accordance with the present invention;
FIG. 9 is a perspective view from another perspective of a second construction of a constant pressure vent assembly in accordance with the present invention;
FIG. 10 is an exploded perspective view of a second construction of the constant pressure vent assembly of the present invention;
FIG. 11 is a schematic view of the present invention mounted on a sealed housing and in a normal state;
FIG. 12 is a first schematic view of the present invention mounted on a sealed housing;
FIG. 13 is a schematic view of the second principle of the present invention mounted on a sealed case for air permeation and pressure equalization;
fig. 14 is a schematic view of the explosion-proof state of the present invention after being mounted on a sealed case.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1-10, the novel explosion-proof balance valve comprises: body 1, guide arm 2, spring 3, piston 4, waterproof ventilated membrane 5 and level pressure ventilation assembly 6, this guide arm 2 wears to locate in this body 1 to with piston 4 fixed connection, and guide arm 2 and piston 4 distribute in 1 both sides of this body, this spring 3 sets up between guide arm 2 and body 1.
Referring to fig. 3 and 4, a hole 11 is formed in the center of the body 1 for the guide rod 2 to pass through, a plurality of through exhaust holes 12 are formed in the periphery of the hole 11 of the body 1, and the piston 4 blocks the exhaust holes 12 under the action of the spring 3. The front end face and the rear end face of the body 1 are respectively provided with a first groove 13 and a second groove 14, a first sealing ring 15 and a second sealing ring 16 are arranged in the first groove 13 and the second groove 14 in an interference fit mode, a plurality of first convex hulls 151 and second convex hulls 152 are formed on the inner side and the outer side of the first sealing ring 15 respectively, the first sealing ring 15 partially protrudes out of the front side face of the body 1, the first sealing ring 15 is used for sealing between the sealing box body 100 and the sealing device, and the sealing device and the sealing box body 100 are guaranteed to form a sealing product. The piston 4 is pressed against the second sealing ring 16, so that the piston 4 is in sealing contact with the body 1, the exhaust hole 12 can be blocked by the piston 4, and the tightness is ensured.
Referring to fig. 4, the guide rod 2 is provided with a through hole 20, the through hole 20 is communicated with the first vent hole 41 of the piston 4 to form a vent passage, the piston 4 is further provided with a waterproof vent film 5 for covering the first vent hole 41, the other end of the guide rod 2 is provided with a constant pressure vent assembly 6, the constant pressure vent assembly 6 is sealed in the through hole 20, and when the pressure is greater than the constant pressure of the constant pressure vent assembly 6, the constant pressure vent assembly 6 is opened, so that the through hole 20 is in a conducting state. This level pressure ventilation assembly 6 can reach good wet effect that hinders, solves the prior art explosion-proof ventilation valve moisture permeability great, the easy dewfall problem in the sealed box under the great environmental condition of humidity and difference in temperature. Meanwhile, the invention has good moisture-resisting effect, so that the sealed box body is not easy to dewing, and a drying agent and a moisture absorption film/paper do not need to be placed in the box body, thereby solving the problems that the drying agent and the moisture absorption film/paper are easy to absorb moisture to reach saturation, have short service life, need to be frequently replaced, have troublesome operation and have higher use cost. In addition, when the anti-explosion vent valve is used, an electrolysis dehumidifying device does not need to be additionally arranged in the sealing box, namely, no power is consumed, and the problems that in the prior art, the anti-explosion vent valve needs to be additionally arranged in the sealing box, so that the power consumption of a battery when an electric vehicle is parked causes the service life of the over-discharge battery to be reduced, the space in the sealing box is occupied, the space utilization rate of a battery pack is reduced, and the energy density of a power battery system is not favorably improved are solved.
The guide rod 2 is fixedly connected with the piston 4 through threads, and the assembly is very convenient.
Referring to fig. 4-5, the piston 4 is provided with a first mounting groove 42, the waterproof breathable film 5 is mounted in the first mounting groove 42, and a press ring 43 is fixed in the first mounting groove 42, and the press ring 43 is pressed on the edge of the waterproof breathable film 5. Wherein, in the first mounting groove 42 of piston 4 was located through interference fit's mode to clamping ring 43, this clamping ring 43 compressed tightly fixed this waterproof ventilated membrane 5, guaranteed that waterproof ventilated membrane 5 steady mounting is in this piston 4. A cover plate 44 is fixed on the piston 4, the cover plate 44 covers the first mounting groove 42, a ventilation groove communicated with the first mounting groove 42 is arranged on the first mounting groove 42, and a gap is formed between the cover plate 44 and the body 1. The cover plate 44 can be fixed on the piston 4 by gluing, interference fit, riveting and the like, and protects the air-permeable membrane in the piston 4 from being damaged.
When the sealing device is used, a corresponding number of through holes are formed in the sealing box body 100, and the body 1 is fixedly arranged on the sealing box body 100 by selecting bolts; or, the body is provided with a plurality of mounting holes on the outer side of the first sealing ring 15, when in use, the sealing box body 100 is provided with a corresponding number of threaded holes, and the body 1 is fixedly mounted on the sealing box body by selecting bolts; or, the body is provided with a threaded column, and the threaded column is directly locked or fixedly installed on the sealed box body by using a matched nut, the invention can select any one of the above assembling modes to be fixed on the sealed box body 100 according to different requirements, and the first sealing ring 15 is extruded between the body 1 and the sealed box body 100, so that the invention and the sealed box body 100 form sealing contact.
As shown in fig. 6-10, the constant pressure air-permeable assembly 6 includes a mounting plate 61 fixed at the other end of the guide rod 2, and a first moisture-blocking sheet 62 and a second moisture-blocking sheet 63 attached to two side surfaces of the mounting plate 61, wherein the mounting plate 61 is provided with a second air hole 611 and a third air hole 612, the first moisture-blocking sheet 62 covers the second air hole 611, and the second moisture-blocking sheet 63 covers the third air hole 612. The first moisture-proof sheet 62 and the second moisture-proof sheet 63 are both elastic rubber sheets made of rubber. In a normal state, the first moisture-blocking sheet 62 and the second moisture-blocking sheet 63 are respectively attached to two side surfaces of the mounting plate 61, and respectively seal the second vent hole 611 and the third vent hole 612.
The constant-pressure breathable assembly 6 has the following two assembling structures:
the first method comprises the following steps: as shown in fig. 6 to 7, the first moisture-blocking sheet 62 and the second moisture-blocking sheet 63 are fixed to the mounting plate 61 by two fixing members 64. In addition, in order to fix the first moisture-proof sheet 62 and the second moisture-proof sheet 63 with certain elasticity on the mounting plate more smoothly, the first moisture-proof sheet 62 is further provided with a first pressing sheet 65, and the first pressing sheet 65 is fixedly connected with the fixing member 64; the second moisture-proof sheet 63 is further provided with a second pressing sheet 66, and the second pressing sheet 66 is fixedly connected with the fixing member 64. That is to say, through pressing this first preforming 65 and second preforming 66 respectively on first wet piece 62 and the wet piece 63 of second hinder, make this first wet piece 62 and the wet piece 63 of second hinder laminate with the mounting panel more, assemble more steadily, and the leakproofness is better, hinders wet effect more ideal. Different air permeation pressures can be designed by adjusting the thickness and hardness of the first moisture-resistant sheet 62 and the second moisture-resistant sheet 63, the size of the first pressing sheet 65 and the second pressing sheet 66, and the like.
The mounting plate 61 is provided with two first mounting holes 601; correspondingly, the first moisture-proof sheet 62 is provided with two second mounting holes 602, the second moisture-proof sheet 63 is provided with two third mounting holes 603, the two fixing members 64 are rivets or protruding columns, and the fixing members 64 pass through the second mounting holes 602, the first mounting holes 601 and the second moisture-proof sheet 63, so that the first moisture-proof sheet 62 and the second moisture-proof sheet 63 are fixed on two sides of the mounting plate 61.
And the second method comprises the following steps: as shown in fig. 8 to 10, the first moisture-proof sheet 62 and the second moisture-proof sheet 63 are both designed to be circular, and the centers of the first moisture-proof sheet 62 and the second moisture-proof sheet 63 are fixed to the mounting plate 61 by a first fixing member 67 and a second fixing member 68, respectively. The first fixing member 67 and the second fixing member 68 are respectively fixed with the centers of the first moisture-blocking sheet 62 and the second moisture-blocking sheet 63, so that the assembly is stable, the attaching effect is good, and the attaching is smooth. The first fixing member 67 and the second fixing member 68 are both rivets or bosses. The first moisture-resistant sheet 62 and the second moisture-resistant sheet 63 may be the same in size or different in size, for example, the air holes (i.e., the third air holes 612) of the sealed box body and the second moisture-resistant sheet 63 may be smaller, which is more favorable for moisture resistance.
In a normal state, under the action of the elastic force of the spring 3, the piston 4 is attached to the second sealing ring and tightly presses the second sealing ring, so that the sealing effect is achieved, and the dustproof and waterproof functions are achieved. In addition, the invention is installed on the sealed box 100, when there is pressure difference between the inside and the outside of the sealed box 100, the air is ventilated through the second air vent 611 and the third air vent 612 on the installation plate 61, the through hole 20 on the guide rod, the first air vent 41 of the piston and the waterproof air permeable membrane 5, so as to balance the pressure difference between the inside and the outside of the sealed box 100, and also avoid the piston from being opened frequently. Furthermore, in a normal state, the first moisture-resisting sheet 62 and the second moisture-resisting sheet 63 are respectively attached to two side surfaces of the mounting plate 61, and the second air hole 611 and the third air hole 612 are respectively sealed, so that a moisture-resisting effect is achieved, and the problems that the moisture permeability of the explosion-proof valve in the prior art is high, and dew condensation is easily caused in a sealed box body under the environment conditions of humidity and large temperature difference are solved.
Referring to fig. 11, in a normal operating state, when the internal and external pressures of the sealed box 100 are balanced and the differential pressure is smaller than the opening pressure of the first moisture-blocking sheet 62 or the second moisture-blocking sheet 63, the through hole 20 on the guide rod is completely closed, so that the sealed box is dustproof and waterproof, and moisture-tight, and can prevent moisture from entering the box to form condensation in the sealed box.
Referring to fig. 12-13, which are schematic diagrams of the ventilation equilibrium pressure, when the difference between the internal pressure and the external pressure is greater than the opening pressure of the first moisture-blocking sheet 62 or the second moisture-blocking sheet 63, the first moisture-blocking sheet 62 or the second moisture-blocking sheet 63 is opened to ventilate, and balance the internal pressure and the external pressure of the sealed box 100. Specifically, in the positive pressure state, as shown in fig. 12, the internal pressure of the sealed box 100 is greater than the opening pressure of the first moisture-blocking sheet 62, and the internal pressure of the sealed box 100 is less than the explosion-proof point, the second moisture-blocking sheet 63 is in the state of sealing the third vent 612, and the gas is vented through the second vent 611 opened by the first moisture-blocking sheet 62, the vent passage, and the waterproof vent membrane 5, so that the venting balance pressure can be realized; in the negative pressure state, as shown in fig. 13, only when the internal pressure of the sealed box 100 is greater than the opening pressure of the second moisture-blocking sheet 63, the first moisture-blocking sheet 62 is in the state of sealing the second vent hole 611, and the gas is vented outwards and inwards through the third vent hole 612 opened by the inward opening second moisture-blocking sheet 63, the vent passage, and the waterproof breathable film 5, so that the ventilation balance pressure can be realized.
Referring to fig. 14, which is a schematic diagram of an explosion-proof state, when gas is ventilated outwards through the second vent 611 opened by the first moisture-blocking sheet 62, the ventilation channel, and the waterproof breathable film 5, and the ventilation rate is insufficient, and the internal-external pressure difference of the sealed box 100 is greater than the explosion-proof pressure of the present invention, the gas directly pushes the piston 4 to move outwards from the vent hole 12 of the body 1, so that the piston is separated from the second sealing ring on the body, and a venting gap is formed, thereby achieving rapid pressure relief and venting, and achieving an explosion-proof function.
In conclusion, the invention integrates the functions of explosion prevention, pressure relief, ventilation, balance of internal and external pressure difference of the sealed box body, moisture barrier and the like, has simple structure and lower cost, and is easy to realize batch production, popularization and application.
It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. A novel explosion proof balanced valve, comprising: body (1), guide arm (2), spring (3), piston (4), this guide arm (2) wear to locate in this body (1) to with piston (4) fixed connection, and guide arm (2) and piston (4) distribute in this body (1) both sides, this spring (3) set up between guide arm (2) and body (1), its characterized in that:
the guide rod (2) is provided with a through hole (20), the through hole (20) is communicated with a first air hole (41) of the piston (4) to form an air permeable channel, the piston (4) is also provided with a waterproof air permeable membrane (5) for covering the first air hole (41), the other end of the guide rod (2) is provided with a constant-pressure air permeable assembly (6), and the constant-pressure air permeable assembly (6) is plugged in the through hole (20); the body (1) is arranged on the sealed box body (100) and forms sealing contact, and the guide rod (2) and the constant-pressure ventilation assembly (6) are arranged in the sealed box body (100); in a normal working state, when the internal and external pressures in the sealed box body are balanced and the pressure difference is less than the opening pressure of the constant-pressure ventilation assembly (6), the through hole (20) on the guide rod (2) is completely sealed; when the internal and external pressure difference is larger than the opening pressure of the constant pressure ventilation assembly (6), the through hole (20) on the guide rod (2) is communicated for ventilation, and the internal and external pressure of the sealing box body is balanced.
2. The novel explosion-proof balanced valve of claim 1, characterized in that: the constant-pressure ventilation assembly (6) comprises a mounting plate (61) fixed at the other end of the guide rod (2) and a first moisture-resistant sheet (62) and a second moisture-resistant sheet (63) which are arranged on two side faces of the mounting plate (61) in a fitting manner, wherein the mounting plate (61) is provided with a second ventilation hole (611) and a third ventilation hole (612) which penetrate through the mounting plate, the first moisture-resistant sheet (62) covers the second ventilation hole (611), and the second moisture-resistant sheet (63) covers the third ventilation hole (612).
3. The novel explosion-proof balanced valve of claim 2, characterized in that: the first moisture-proof sheet (62) and the second moisture-proof sheet (63) are fixed on the mounting plate (61) through fixing pieces (64).
4. A novel explosion proof balanced valve as claimed in claim 3 wherein: the first moisture-resisting sheet (62) is also provided with a first pressing sheet (65), and the first pressing sheet (65) is fixedly connected with the fixing piece (64); the second moisture-resisting sheet (63) is also provided with a second pressing sheet (66), and the second pressing sheet (66) is fixedly connected with the fixing piece (64).
5. The novel explosion-proof balanced valve of claim 2, characterized in that: the first moisture-proof sheet (62) and the second moisture-proof sheet (63) are both circular, and the centers of the first moisture-proof sheet (62) and the second moisture-proof sheet (63) are fixed on the mounting plate (61) through a first fixing piece (67) and a second fixing piece (68) respectively.
6. The novel explosion-proof balanced valve according to any one of claims 1 to 5, characterized in that: the center of the body (1) is provided with a hole (11) for the guide rod (2) to pass through, a plurality of through exhaust holes (12) are formed in the periphery of the hole (11) of the body (1), and the piston (4) blocks the exhaust holes (12) under the action of the spring (3).
7. The novel explosion-proof balanced valve according to any one of claims 1 to 5, characterized in that: a first groove (13) and a second groove (14) are respectively installed on the front end face and the rear end face of the body (1), a first sealing ring (15) and a second sealing ring (16) are installed in the first groove (13) and the second groove (14) in an interference fit mode, a plurality of first convex hulls (151) and second convex hulls (152) are respectively formed on the inner side and the outer side of the first sealing ring (15), the first sealing ring (15) partially protrudes out of the front side face of the body (1) and is in pressing contact with the surface of the sealing box body (100), and the body (1) is in sealing contact with the sealing box body (100); the piston (4) is pressed against the second sealing ring (16).
8. The novel explosion-proof balanced valve according to any one of claims 1 to 5, characterized in that: the guide rod (2) is fixedly connected with the piston (4) through threads.
9. The novel explosion-proof balanced valve according to any one of claims 1 to 5, characterized in that: piston (4) are provided with first mounting groove (42), waterproof ventilated membrane (5) are installed in this first mounting groove (42), and first mounting groove (42) internal fixation has a clamping ring (43), and this clamping ring (43) are pressed on this waterproof ventilated membrane (5) edge.
10. The novel explosion-proof balanced valve of claim 9, characterized in that: be fixed with apron (44) on piston (4), this apron (44) lid is equipped with the ventilative groove of intercommunication on this first mounting groove (42), and is formed with the clearance between this apron (44) and body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747655.0A CN111779866A (en) | 2020-07-30 | 2020-07-30 | Novel explosion-proof balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747655.0A CN111779866A (en) | 2020-07-30 | 2020-07-30 | Novel explosion-proof balanced valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111779866A true CN111779866A (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010747655.0A Pending CN111779866A (en) | 2020-07-30 | 2020-07-30 | Novel explosion-proof balanced valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113594623A (en) * | 2021-08-11 | 2021-11-02 | 蜂巢能源科技有限公司 | Explosion-proof valve for battery pack |
| CN114122614A (en) * | 2020-08-31 | 2022-03-01 | 宁德时代新能源科技股份有限公司 | Balance valve, battery and electric equipment |
-
2020
- 2020-07-30 CN CN202010747655.0A patent/CN111779866A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122614A (en) * | 2020-08-31 | 2022-03-01 | 宁德时代新能源科技股份有限公司 | Balance valve, battery and electric equipment |
| CN114122614B (en) * | 2020-08-31 | 2023-12-08 | 宁德时代新能源科技股份有限公司 | Balancing valve, battery and electric equipment |
| CN113594623A (en) * | 2021-08-11 | 2021-11-02 | 蜂巢能源科技有限公司 | Explosion-proof valve for battery pack |
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