CN113404903A

CN113404903A - Quick pressure-reducing breather valve

Info

Publication number: CN113404903A
Application number: CN202110727462.3A
Authority: CN
Inventors: 韩劲草; 韩思成
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-09-17

Abstract

The invention discloses a rapid decompression breather valve, which comprises a valve shell, a valve cavity arranged in the valve shell, a first valve core movably arranged in the valve cavity, and a second valve core movably arranged in the first valve core, wherein a first vent hole communicated with the valve cavity is arranged at the first end of the valve shell, a second vent hole communicated with the valve cavity is arranged at the second end of the valve shell, a first sealing part matched with the first valve core is arranged in the valve cavity, the first valve core unidirectionally limits fluid to flow from the first vent hole to the second vent hole when being abutted against the first sealing part, a first magnet is fixedly arranged in the valve cavity, a second magnet magnetically matched with the first magnet and driving the first valve core to be in sealing abutment against the first sealing part is fixedly arranged on the first valve core, a second sealing part matched with the second valve core is arranged in the first valve core, and unidirectionally limits the fluid to flow from the second vent hole to the first vent hole when the second valve core is abutted against the second sealing part, a reset piece is arranged between the second valve core and the first valve core.

Description

Quick pressure-reducing breather valve

Technical Field

The invention relates to the field of breather valves, in particular to a rapid pressure reduction breather valve.

Background

In the design or packing transportation of precision electronic equipment and the like, it is designed to have a sealed case to prevent the electronic equipment from being damaged due to the entry of moisture and dust. However, these vessels are subject to high pressure or vacuum differentials due to temperature and altitude variations. To resist such pressure, the housing or packaging container would need to be made of a very strong material, which would make it bulky, heavy and costly to store and transport.

In some applications, the pressure or vacuum differential versus flow rate curve of the valve may be a critical factor in whether the sealed container is deformed (or even exploded). In other words, if the valve is not able to expel or draw in air fast enough, the container and contents may be damaged. This may occur, for example, when the aircraft is at high altitude, the cabin of the aircraft suddenly loses pressure, and it is necessary to depressurize the containers in the cabin very quickly. Vessels that cannot quickly equalize pressure may explode, placing the aircraft and personnel at risk.

While conventional breather valves may be effective in mitigating depressurization events for small containers, they are typically not sufficiently fluid for containers having a volume greater than a few cubic feet. The reason is that conventional valves rely on a compression spring to keep their spools closed, and although the spools need to be as open as possible to maximize valve flow, the spools encounter resistance from the compression spring rebounding. When the produced deformation of spring by the compression is big more, produced elastic restoring force also can be big more, in case the container internal and external pressure difference diminishes, the spring will kick-back rapidly and drive the breather valve opening diminish or seal, causes the flow of follow-up air current circulation to diminish, and this kind of action of compression spring has restricted the breather valve and has carried out the pressure release with great flow fast, has certain defect.

Disclosure of Invention

The invention aims at the defects of the prior art and provides a rapid decompression breather valve.

The technical scheme adopted by the invention for solving the technical problems is as follows: the structure of the rapid decompression breather valve comprises a valve shell, a valve cavity arranged in the valve shell, a first valve core movably arranged in the valve cavity and a second valve core movably arranged in the first valve core, wherein a first vent hole communicated with the valve cavity is formed in the first end of the valve shell, a second vent hole communicated with the valve cavity is formed in the second end of the valve shell, a first sealing part matched with the first valve core is arranged in the valve cavity, the first valve core can unidirectionally limit fluid to flow to the second vent hole from the first vent hole when being abutted against the first sealing part, a first magnet is fixedly arranged in the valve cavity, a second magnet which is magnetically matched with the first magnet and drives the first valve core to be abutted against the first sealing part in a sealing manner is fixedly arranged on the first valve core, a second sealing part matched with the second valve core is arranged in the first valve core, and the second vent hole can unidirectionally limit fluid to flow to the first vent hole from the second vent hole when being abutted against the second sealing part And a reset piece which is used for pushing the second valve core to be in sealing and abutting connection with the second sealing part is arranged between the second valve core and the first valve core.

In the rapid pressure-reducing breather valve, the first valve core is a hollow cylindrical valve core, the valve cavity is a circular hole-shaped valve cavity, two ends of the first valve core are both in an open shape, a first sealing ring protruding out of the outer side wall of the first valve core is arranged at the first end of the first valve core, the first sealing part is a first annular boss protruding out of the inner side wall of the valve cavity and capable of abutting against the first sealing ring, and a third vent hole penetrating through the side wall of the first valve core is arranged below the second sealing part at the second end of the side wall of the first valve core.

In the rapid decompression breather valve, the second end of the first valve core is provided with a fixed seat for fixedly accommodating the second magnet, the fixed seat is fixedly connected with the second end of the first valve core through a supporting fin, the fixed seat is provided with an accommodating cavity for embedding and accommodating the second magnet, and the first magnet and the second magnet are attracted magnetically.

In the rapid decompression breather valve, the valve cavity is also internally provided with an adjusting seat which is used for fixedly installing the first magnet and can adjust the position of the first magnet in the valve cavity, the second end of the side wall of the valve cavity is provided with an adjusting thread, the adjusting seat is a round adjusting seat, the outer side wall of the adjusting seat is provided with a first external thread which can be in threaded connection with the adjusting thread, and the adjusting seat is provided with a fourth vent hole which penetrates through the adjusting seat.

In the rapid decompression breather valve, the second valve core comprises a cylinder body and a second sealing ring fixedly arranged on the outer side wall of the second end of the cylinder body, the second sealing part is a second annular boss fixedly arranged on the inner side wall of the first valve core and capable of abutting against the second sealing ring, the first end of the cylinder body is fixedly provided with an end cover for sealing the first end of the cylinder body, the second end of the cylinder body is provided with an opening opposite to the fixed seat, and the resetting piece is a first spring which is sleeved in the cylinder body and abutted against the fixed seat and the end cover.

In the rapid decompression breather valve, a first sealing washer is arranged on one surface of the first sealing ring opposite to the first annular boss in a cushioning mode, a second sealing washer is arranged on one surface of the second sealing ring opposite to the second annular boss in a cushioning mode, a first locking ring which is in threaded connection with the cylinder body and is used for locking the second sealing washer is arranged on the outer side wall of the cylinder body, and a manual button which can be used for pushing the second sealing ring to be far away from the second annular boss is fixedly arranged at the first end of the cylinder body.

In the rapid decompression breather valve, the end face cover of the first end of the valve shell is provided with the transparent observation cover, the side wall of the valve shell is provided with the detection hole extending from the end face of the first end of the valve shell to the end face of the second end of the valve shell, and a humidity indication card is padded between the transparent observation cover and the first end of the detection hole.

In the rapid decompression breather valve, the transparent observation cover comprises a cover plate, a cylindrical part fixedly provided with the periphery of the cover plate, and a stop ring protruding out of the outer side wall of the cylindrical part, an annular groove for the cylindrical part and the stop ring to be inserted and accommodated is formed in the end face of the first end of the valve housing, and a second locking ring which can be in threaded connection with the annular groove and used for locking the stop ring is arranged in the annular groove.

In the rapid decompression breather valve, the outer side wall of the first end of the valve shell is fixedly provided with an annular stop part protruding out of the outer side wall of the valve shell, the outer side wall of the valve shell is also provided with a second external thread, and the valve shell is also sleeved with a locking nut which is in threaded connection with the second external thread and is used for being matched with the annular stop part.

In the rapid decompression breather valve, the second end of the valve shell is also provided with a dryer which is communicated with the second vent hole and can be detachably connected with the second end of the valve shell, and the dryer comprises a containing shell which can be detachably connected with the second end of the valve shell and a drying agent contained in the containing shell;

the bottom wall and/or the side wall of the containing shell are/is provided with air holes, or the containing shell is made of air-permeable materials.

The rapid decompression breather valve has the following beneficial effects: when the rapid decompression breather valve is used, the breather valve is arranged on a container, and when the internal pressure and the external pressure of the container are the same, the first valve core is in sealing fit with the first sealing part under the magnetic force action of the first magnet and the second magnet, so that the external gas is prevented from flowing to the second vent hole from the first vent hole. Simultaneously, the second case is in the sealed cooperation of second sealing portion under the effect of piece that resets, prevents that gas from flowing to first air vent by the second air vent in the container, realizes the inside and outside sealed of container. When the air pressure in the container is greater than the air pressure outside the container, the air flow in the container enters the valve cavity from the second vent hole and pushes against the second valve core, the second valve core pushes the first valve core to move towards the direction far away from the first sealing part through the second sealing part, meanwhile, the second magnet moves along with the first valve core and gradually gets away from the first magnet, at the moment, an exhaust passage for the air flow in the container to flow out is formed between the first sealing part and the first valve core, and the air flow in the container can be discharged from the second vent hole, the exhaust passage and the first vent hole. In this application, drive first case through setting up first magnet and second magnet and reset, because the magnetic attraction between first magnet and the second magnet reduces gradually along with the distance grow between first magnet and the second magnet (and the spring deformation is big more the elasticity restoring force that produces is more opposite), when the second magnet was supported and is pushed away from first magnet, the magnetic attraction between first magnet and the second magnet is less. Therefore, even after the air pressure in the container is reduced, the second magnet cannot be drawn close to the first magnet quickly, the opening of the exhaust channel is kept unchanged, and the second magnet is drawn close to the first magnet under the action of weak magnetic attraction force and closes the exhaust channel to be sealed again until the air pressure in the container is relative to the air pressure in the container, so that the purpose of quick pressure relief is achieved.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic cross-sectional view of a rapid decompression breather valve according to the present invention;

FIG. 2 is a schematic cross-sectional exploded view of the rapid pressure relief breather valve of the present invention;

FIG. 3 is a schematic diagram of an exploded view of the rapid pressure relief breather valve of the present invention;

fig. 4 is a schematic sectional view of the first and second valve cores of the rapid decompression breather valve of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-4, in the first embodiment of the rapid pressure-reducing breathing valve of the present invention, the breathing valve 1 comprises a valve housing 2, a valve chamber 3 disposed in the valve housing 2, a first valve core 4 movably disposed in the valve chamber 3, and a second valve core 5 movably disposed in the first valve core 4, a first end of the valve housing 2 is provided with a first vent hole 6 capable of communicating with the valve chamber 3, a second end of the valve housing 2 is provided with a second vent hole 7 capable of communicating with the valve chamber 3, the valve chamber 3 is provided with a first sealing portion 8 capable of cooperating with the first valve core 4, the first valve core 4 unidirectionally restricts fluid from flowing from the first vent hole 6 to the second vent hole 7 when abutting against the first sealing portion 8, the valve chamber 3 is fixedly provided with a first magnet 9, the first valve core 4 is fixedly provided with a second magnet 10 which is magnetically cooperating with the first magnet 9 and drives the first valve core 4 to abut against the first sealing portion 8, a second sealing part 11 which can be matched with the second valve core 5 is arranged in the first valve core 4, when the second valve core 5 is abutted against the second sealing part 11, the second valve core 5 unidirectionally limits fluid to flow from the second vent hole 7 to the first vent hole 6, and a resetting piece 12 which is abutted against the second valve core 5 and the second sealing part 11 to be in sealing abutment is arranged between the second valve core 5 and the first valve core 4.

When the rapid decompression breather valve 1 is used, the breather valve 1 is arranged on a container, and when the internal pressure and the external pressure of the container are the same, the first valve core 4 is in sealing fit with the first sealing part 8 under the magnetic force action of the first magnet 9 and the second magnet 10, so that the external air is prevented from flowing to the second vent hole 7 from the first vent hole 6. Meanwhile, the second valve core 5 is in sealing fit with the second sealing part 11 under the action of the resetting piece 12, so that gas in the container is prevented from flowing to the first vent hole 6 from the second vent hole 7, and the inside and outside of the container are sealed. When the air pressure in the container is greater than the air pressure outside the container, the air flow in the container enters the valve cavity 3 through the second vent hole 7 and pushes against the second valve core 5, the second valve core 5 pushes the first valve core 4 to move towards the direction far away from the first sealing part 8 through the second sealing part 11, meanwhile, the second magnet 10 moves along with the first valve core 4 and gradually gets away from the first magnet 9, at the moment, an exhaust passage for the air flow in the container to flow out is formed between the first sealing part 8 and the first valve core 4, and the air flow in the container can be discharged through the second vent hole 7, the exhaust passage and the first vent hole 6. In the present application, the first valve element 4 is driven to reset by providing the first magnet 9 and the second magnet 10, since the magnetic attraction force between the first magnet 9 and the second magnet 10 is gradually reduced as the distance between the first magnet 9 and the second magnet 10 becomes larger (contrary to the larger the elastic restoring force generated as the spring deformation becomes larger), when the second magnet 10 is pushed away from the first magnet 9, the magnetic attraction force between the first magnet 9 and the second magnet 10 is smaller. Therefore, even after the air pressure in the container is reduced, the second magnet 10 cannot be drawn close to the first magnet 9 quickly, the opening size of the exhaust channel is kept unchanged, and the second magnet 10 cannot be drawn close to the first magnet 9 and close the exhaust channel under the action of weak magnetic attraction until the air pressure in the container is relative to the air pressure in the container, and is sealed again, so that the purpose of quickly relieving pressure is achieved.

It can be understood that, when the internal air pressure of the container is lower than the external air pressure of the container, the external air flow enters from the first vent hole 6 and pushes against the second valve core 5, so that the second valve core 5 is far away from the second sealing portion 11, at this time, an air inlet channel for the external air flow to flow into the container is formed between the second sealing portion 11 and the second valve core 5, and when the internal and external air pressures of the container are corresponding, the resetting piece 12 pushes the second valve core 5 to reset and seal with the second sealing portion 11 again, so as to block the air inlet channel.

In this embodiment, the first valve element 4 is a hollow cylindrical valve element, the valve cavity 3 is a circular hole-shaped valve cavity 3, both ends of the first valve element 4 are open, a first sealing ring 13 protruding out of the outer side wall of the first valve element 4 is arranged at a first end of the first valve element 4, the first sealing portion 8 is a first annular boss protruding out of the inner side wall of the valve cavity 3 and capable of abutting against the first sealing ring 13, and a third vent hole 14 penetrating through the side wall of the first valve element 4 is arranged below the second sealing portion 11 at a second end of the side wall of the first valve element 4.

Preferably, the outer diameter of the first valve core 4 is equal to or slightly smaller than the bore diameter of the valve cavity 3. The valve chamber 3 serves as a guide for the displacement of the first valve slide 4.

Specifically, a fixing seat 15 for fixing and accommodating the second magnet 10 is arranged at the second end of the first valve core 4, the fixing seat 15 is fixedly connected with the second end of the first valve core 4 through a supporting fin 16, an accommodating cavity for embedding and accommodating the second magnet 10 is arranged on the fixing seat 15, and the first magnet 9 and the second magnet 10 are attracted magnetically.

In the installation and later period use process of the first magnet 9, in order to adjust the position of the first magnet 9, an adjusting seat 17 which is used for fixedly installing the first magnet 9 and can adjust the position of the first magnet 9 in the valve cavity 3 is further arranged in the valve cavity 3, the second end of the side wall of the valve cavity 3 is provided with an adjusting thread, the adjusting seat 17 is a circular adjusting seat 17, a first external thread 18 which can be screwed with the adjusting thread is arranged on the outer side wall of the adjusting seat 17, and a fourth through hole 19 which penetrates through the adjusting seat 17 is arranged on the adjusting seat 17.

In the present application, the distance between the first magnet 9 and the second magnet 10 can be adjusted by rotating the adjustment knob 17. For example, along with the long-term use of the breather valve 1, the magnetism of the first magnet 9 and the second magnet 10 is weakened, at this time, in order to keep the original magnetic attraction effect, the adjusting seat 17 can be rotated towards the direction close to the second magnet 10, and the adjusting seat 17 can drive the first magnet 9 to approach the second magnet 10, so as to increase the magnetic attraction force between the first magnet 9 and the second magnet 10. When the magnetic attraction between the first magnet 9 and the second magnet 10 needs to be weakened, the adjusting seat 17 can be rotated in the direction away from the second magnet 10, so that the first magnet 9 and the second magnet 10 are separated. Furthermore, the purpose of adjusting the pressure difference between the inside and the outside of the container and the pressure relief speed can be achieved by adjusting the position of the first magnet 9.

Further, the second valve core 5 includes a barrel 20, and a second sealing ring 21 fixedly disposed on an outer side wall of a second end of the barrel 20, the second sealing portion 11 is a second annular boss fixedly disposed on an inner side wall of the first valve core 4 and capable of abutting against the second sealing ring 21, a first end of the barrel 20 is fixedly disposed with an end cap sealing a first end of the barrel 20, a second end of the barrel 20 is disposed with an opening opposite to the fixing seat 15, and the reset member 12 is a first spring 12 sleeved in the barrel 20 and abutting against the fixing seat 15 and the end cap.

Further, for better sealing effect, a first sealing washer 22 is arranged on one face of the first sealing ring 13 opposite to the first annular boss, a second sealing washer 23 is arranged on one face of the second sealing ring 21 opposite to the second annular boss, a first locking ring 24 which is in threaded connection with the barrel 20 and used for locking the second sealing washer 23 is arranged on the outer side wall of the barrel 20, and a manual button 25 which can be used for pushing the second sealing ring 21 to be far away from the second annular boss is fixedly arranged at the first end of the barrel 20.

When a user needs to manually relieve pressure, the manual button 25 can be manually pressed, and the manual button 25 pushes the second valve spool 5 to be away from the second annular boss, so that a channel for communicating the inside and the outside of the container is formed between the second valve spool 5 and the second annular boss, and therefore manual pressure relief is achieved.

In this embodiment, an annular sealing groove for the first sealing gasket 22 to be inserted and accommodated is disposed on a surface of the first sealing ring 13 opposite to the first annular boss, and when the first sealing gasket 22 is inserted and accommodated in the annular sealing groove, the first sealing gasket protrudes from the surface of the first sealing ring 13. Furthermore, a sloping platform matched with the first sealing washer 22 is arranged on one surface of the first annular boss corresponding to the first sealing ring 13.

When the second sealing washer 23 is installed, the second sealing washer 23 is firstly sleeved outside the cylinder 20, and then the first locking ring 24 is rotated until the second sealing washer 23 is tightly abutted against the second sealing ring 21, so that the second sealing washer 23 is fixed.

In order to facilitate the staff to know the humidity in the container through the breather valve 1 in time, the first end of the valve housing 2 is covered with a transparent observing cover 26, the sidewall of the valve housing 2 is provided with a detecting hole 27 extending from the first end of the valve housing 2 to the second end of the valve housing 2, and a humidity indicating card 28 is disposed between the transparent observing cover 26 and the first end of the detecting hole 27.

When installing breather valve 1 on the container, the inspection hole 27 second end stretches into in the container and with the inside intercommunication of container, the gas in the container can flow to humidity indicator card 28 through inspection hole 27, humidity indicator card 28 after with the interior gas contact of container, can show according to gas humidity, play the purpose of observing humidity in the container.

Specifically, the transparent viewing cover 26 includes a cover plate 29, a cylindrical portion 30 fixedly disposed on a periphery of the cover plate 29, and a stop ring 31 protruding from an outer side wall of the cylindrical portion 30, an annular groove 33 is disposed on an end surface of the first end of the valve housing 2 for the cylindrical portion 30 and the stop ring 31 to be inserted therein, and a second locking ring 32 is disposed in the annular groove 33 and can be in threaded connection with the annular groove 33 for locking the stop ring 31.

Furthermore, a first anti-leakage sealing ring 40 is arranged between the stop ring 31 and the bottom wall of the annular groove 33. The inner side surface of the transparent observation cover 26 is provided with an outer sleeve 42 which can be inserted into the valve cavity 3 and an inner sleeve 43 which is positioned in the outer sleeve 42, a second air leakage preventing sealing ring 41 is arranged between the outer side wall of the outer sleeve 42 and the inner side wall of the valve cavity 3 in a cushioning manner, and the first air leakage preventing sealing ring 40 and the second air leakage preventing sealing ring 41 are arranged, so that the air leakage of the detection hole 27 can be prevented. In this embodiment, for better return effect, for example, when the magnet coupling the first valve spool 4 and the adjustment seat 17 may not be attractive enough to pull the first valve spool 4 closed again. A second spring 39 is further disposed between the transparent viewing cover 26 and the second annular boss, a first end of the second spring 39 is sleeved outside the inner sleeve 43, and a second end of the second spring 39 abuts against the second annular boss. The second spring 39 provides a certain elastic restoring force for promoting the restoration of the first spool 4 when the first spool 4 is away from the first annular boss.

Furthermore, a limiting plate 44 for passing a button rod of the manual button 25 is arranged at the second end of the inner sleeve 43, and the first vent hole 6 is arranged on the limiting plate 44.

In order to facilitate the installation of the breather valve 1, an annular stop portion 34 protruding from the outer side wall of the valve housing 2 is fixedly disposed on the outer side wall of the first end of the valve housing 2, a second external thread 36 is further disposed on the outer side wall of the valve housing 2, and a lock nut 35 screwed with the second external thread 36 and used for being matched with the annular stop portion 34 is further sleeved on the valve housing 2.

When installing breather valve 1, can insert the valve case 2 second end to the container in, then locate valve case 2 second end and second external thread 36 spiro union with lock nut 35 cover, rotatory lock nut 35 can realize the fixed to breather valve 1. In order to prevent air leakage at the joint of the breather valve 1 and the container, a third sealing washer 45 and a fourth sealing washer 46 are respectively padded on the annular stop part 34 and the locking nut 35.

In another embodiment of the invention, the second end of the valve housing 2 is further provided with a dryer 37 communicating with the second vent hole 7 and detachably connected to the second end of the valve housing 2, the dryer 37 comprises a housing detachably connected to the second end of the valve housing 2, and a drying agent 38 contained in the housing.

When using breather valve 1, can pass through threaded connection in valve case 2 second end with desicator 37 for desicator 37 and valve case 2 intercommunication, when outside air current gets into in the container, dry in getting into desicator 37 through second vent 7, then flow into in the container again, realize getting into gaseous drying to the external world, avoid moist gas to cause the corruption etc. to equipment in the container.

In order to prevent the desiccant 38 from entering the valve chamber 3 of the breather valve 1, a removable filter screen may be provided at the mouth of the housing, or the desiccant 38 may be wrapped in a desiccant bag. Also, to avoid the desiccant 38 from blocking the airflow, the desiccant 38 or desiccant packet is an irregular shaped desiccant 38 or desiccant packet.

In addition, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A rapid decompression breather valve is characterized in that the breather valve comprises a valve shell, a valve cavity arranged in the valve shell, a first valve core movably arranged in the valve cavity, and a second valve core movably arranged in the first valve core, a first vent hole communicated with the valve cavity is arranged at a first end of the valve shell, a second vent hole communicated with the valve cavity is arranged at a second end of the valve shell, a first sealing part matched with the first valve core is arranged in the valve cavity, the first valve core unidirectionally limits fluid to flow from the first vent hole to the second vent hole when being abutted against the first sealing part, a first magnet is fixedly arranged in the valve cavity, a second magnet which is magnetically matched with the first magnet and drives the first valve core to be abutted against the first sealing part in a sealing way is fixedly arranged on the first valve core, a second sealing part matched with the second valve core is arranged in the first valve core, when the second valve core is abutted against the second sealing part, the fluid is limited to flow from the second vent hole to the first vent hole in a one-way mode, and a reset piece which is abutted against and pushes the second valve core and the second sealing part to be in sealing abutment is arranged between the second valve core and the first valve core.

2. The rapid pressure reduction breather valve according to claim 1, wherein the first valve element is a hollow cylindrical valve element, the valve chamber is a circular hole-shaped valve chamber, both ends of the first valve element are open, a first sealing ring protruding from the outer side wall of the first valve element is arranged at a first end of the first valve element, the first sealing portion is a first annular boss protruding from the inner side wall of the valve chamber and capable of abutting against the first sealing ring, and a third vent hole penetrating through the side wall of the first valve element is arranged at a second end of the side wall of the first valve element, which is positioned below the second sealing portion.

3. The rapid pressure reduction breather valve according to claim 2, wherein the second end of the first valve core is provided with a fixing seat for fixedly accommodating the second magnet, the fixing seat is fixedly connected with the second end of the first valve core through a supporting fin, the fixing seat is provided with an accommodating cavity for embedding and accommodating the second magnet, and the first magnet and the second magnet are attracted magnetically.

4. The rapid pressure reduction breather valve according to claim 3, wherein an adjusting seat is further disposed in the valve chamber for fixedly mounting the first magnet and adjusting the position of the first magnet in the valve chamber, an adjusting screw thread is disposed at the second end of the side wall of the valve chamber, the adjusting seat is a circular adjusting seat, a first external screw thread capable of being screwed with the adjusting screw thread is disposed on the outer side wall of the adjusting seat, and a fourth vent hole penetrating through the adjusting seat is disposed on the adjusting seat.

5. The rapid pressure reduction breather valve according to claim 3, wherein the second valve core includes a cylinder body, and a second sealing ring fixedly disposed on an outer sidewall of a second end of the cylinder body, the second sealing portion is a second annular boss fixedly disposed on an inner sidewall of the first valve core and capable of abutting against the second sealing ring, the first end of the cylinder body is fixedly provided with an end cap for sealing the first end of the cylinder body, the second end of the cylinder body is provided with an opening opposite to the fixing seat, and the reset member is a first spring sleeved in the cylinder body and abutting against the fixing seat and the end cap.

6. The rapid pressure reduction breather valve according to claim 5, wherein a first sealing washer is arranged on a face, opposite to the first annular boss, of the first sealing ring, a second sealing washer is arranged on a face, opposite to the second annular boss, of the second sealing ring, a first locking ring which is in threaded connection with the cylinder body and used for locking the second sealing washer is arranged on the outer side wall of the cylinder body, and a manual button which can be used for pushing the second sealing ring to be away from the second annular boss is fixedly arranged at the first end of the cylinder body.

7. The rapid decompression breather valve according to claim 1, wherein the valve housing first end cover is provided with a transparent observation cover, the valve housing sidewall is provided with a detection hole extending from the valve housing first end cover to the valve housing second end cover, and a humidity indicator is disposed between the transparent observation cover and the detection hole first end.

8. The rapid decompression breather valve according to claim 7, wherein the transparent viewing cover comprises a cover plate, a cylindrical portion fixedly disposed at a periphery of the cover plate, and a stop ring protruding from an outer sidewall of the cylindrical portion, an annular groove is disposed at the first end of the valve housing for receiving the cylindrical portion and the stop ring, and a second locking ring is disposed in the annular groove and is threadedly engaged with the annular groove for locking the stop ring.

9. The rapid decompression breather valve according to claim 1, wherein an annular stop portion protruding from the outer side wall of the valve housing is fixedly disposed on the outer side wall of the first end of the valve housing, the outer side wall of the valve housing is further provided with a second external thread, and a lock nut screwed with the second external thread and adapted to engage with the annular stop portion is further sleeved on the valve housing.

10. The rapid decompression breathing valve according to claim 1, wherein the second end of the valve housing is further provided with a dryer in communication with the second vent and detachably connected to the second end of the valve housing, the dryer comprising a housing case detachably connected to the second end of the valve housing and a desiccant contained in the housing case;