CN208719497U - A kind of explosion-proof valve for inflating spool, fast aeration detection box leakproofness - Google Patents

Abstract

A kind of inflation spool, the inflation spool include fixing piece, compressed spring, inflation piston, rubber seal, and one end of the inflation piston is connect by compressed spring with fixing piece, and the other end for inflating piston is connect with rubber seal.The utility model on explosion-proof valve by being arranged inflation spool, and from inflation spool inflation, compared to intake velocity is fast, the used time is short, detection efficiency is high for inflation from the ventilated membrane from explosion-proof valve, and not will lead to ventilated membrane and damage, explosion-proof defective valve；Sealing detection inflates spool and explosion-proof valve together as one, without in addition opening up sealing propertytest aeration aperture on seal case, after detection, inflation piston automatic-resetting is driven by spring, restore sealing state, it is not required to additionally mounted bolt to block aeration aperture, avoids that secondary seal is bad, the risk of protection level requirements is not achieved.

Description

A kind of explosion-proof valve for inflating spool, fast aeration detection box leakproofness

Technical field

The utility model relates to explosion-proof valve technical field, espespecially a kind of inflation spool, fast aeration detection box leakproofness Explosion-proof valve.

Background technique

The cabinet of sealing, such as outdoor electric control box, energy-storage battery case, battery of electric vehicle packet etc. be relevant device, new " heart " of energy automobile, as the core component of control and driving, safety and the operation is stable, reliability are directly rung to setting Standby or new energy electric motor vehicle service performance and safety.When in controller case body intake after insulation performance reduction cause short circuit, Control system failure, battery pack water inlet will lead to battery short circuit, and then cause battery explosion, in order to prevent battery pack in battery pack Or the performance of component is influenced by water, dust etc. in electric control box, and the cabinets such as outdoor electric appliance control cabinet, battery pack are wanted Asking must be sealed, and waterproof and dust-proof protection level requirements are up to state standards GB4208-2008 " shell protection grade " (I P-Code) I P67 or more.

For the battery pack of sealing, high temperature and pressure can be generated when abnormal explosion occurs in battery core, there are the wind of heavy explosion Danger, it is therefore desirable to which a kind of explosion-proof valve prevents explosion or reduces the damage that explosion generates.Current battery explosion-proof valve mainly uses Installation metal or the explosion-proof diaphragm of plastics, high pressure inferior pyramidal thimble puncture the structure of explosion rupture disk, rise to a certain extent in valve body Ventilative and explosion-proof effect is arrived, but its structure is relative complex, explosion-proof is to lean on metal explosion-proof piece or breathable film under pressure Rupture or the breathable film protrusion that deforms by taper thimble puncture realization, and the accuracy rate of explosion is poor, stability is bad, and And because explosion-proof diaphragm is once punctured explosion-proof valve and scraps, batch detection can not be carried out in processing procedure, there are certain qualities Risk.

Detection for seal case degree of protection is protected in GB4208-2008 standard clear stipulaties I P67 or more The test method and requirement of grade: dust-proof test is tested using talcum powder in dustproof test box, it is desirable that in off-test cabinet not There can be dust deposit；Waterproof test requirement 1 meter of depth of water of immersion, the testing time at least 30 minutes.It is detected by the above standard method, behaviour Make complexity, the used time is more, and detection rear box is stained with water and dust, needs to clean, is dry, and detection post-processes trouble, is adapted only to The requirement quickly detected in seal case batch production processing procedure is not achieved in sampling inspection, is in the industry in batch production processing procedure In be all made of inflation detection box whether gas leakage to verify cabinet whether good seal verifies cabinet protection effect.It is general to use Following methods: (1) boring a threaded hole on cabinet, connect gas-charging connection and detected, although the method inflation detection speed is fast, But on cabinet need to open a hole more, cabinet difficulty of processing is increased, and install one again after qualification after inflation detection Bolt carries out secondary plugging sealing, can not prove bolt secondary seal effect, there are aeration aperture secondary seal is bad, is not achieved anti- Protect the risk of grade.(2) inflated in cabinet by the ventilated membrane of explosion-proof balanced valve, but waterproof ventilated membrane Air permenbility generally compared with Small, aeration speed is very slow, the low problem of detection efficiency, and if keeping waterproof ventilated membrane broken with existing if high-pressure aerated Damage, leads to the risk of explosion-proof defective valve.

Therefore explosion-proof valve and box body tightness the detection inflation method of the prior art are still needed to further study, be improved.

Summary of the invention

To solve the above problems, the utility model provides a kind of charge valve that detection is quick, easy to use, easy to operate The explosion-proof valve of core, fast aeration detection box leakproofness.

To achieve the above object, the utility model provides a kind of inflation spool, and the inflation spool includes fixing piece, compression One end of spring, inflation piston, rubber seal, the inflation piston is connect by compressed spring with fixing piece, and piston is inflated The other end connect with rubber seal.

Specifically, one end of the inflation piston is additionally provided with guide post, is offered on the fixing piece to guide post radial direction The pilot hole of limit.

To achieve the above object, the utility model provides a kind of explosion-proof valve of fast aeration detection box leakproofness, including Valve body, inflation spool, explosion-proof spool, the valve body are laterally equipped with Inflatable clamper card slot, offer on the valve body Aeration aperture, the inflation spool include fixing piece, compressed spring, inflation piston, rubber seal, and the fixing piece is installed in valve One end of one end of ontology, the inflation piston is connect by compressed spring with fixing piece, and the other end and rubber of piston are inflated The end face that rubber seal on inflation piston presses against aeration aperture is kept aeration aperture close by sealing element connection by compressed spring Envelope；

One end of the explosion-proof spool is installed with guide rod, and the end of the guide rod is equipped with flange, the center of the valve body Folding pilot hole is offered, valve body offers venthole, another end surfaces of the valve body along the periphery of folding pilot hole It is equipped with inner seal ring slot along the periphery of venthole, is equipped with inner seal ring in the inner seal ring slot, the explosion-proof spool is led Bar passes through folding pilot hole, and is socketed with explosion-proof reset spring on guide rod surface, and explosion-proof reset spring is mounted on valve body and convex Between edge, it is bonded explosion-proof spool with the inner seal ring on valve body, by vent seal.

Specifically, one end of the inflation piston is additionally provided with guide post, is offered on the fixing piece to guide post radial direction The pilot hole of limit.

Specifically, the inner seal ring is circular seal ring.

Specifically, the explosion-proof spool further includes waterproof ventilated membrane, diaphragm mounting ring, diaphragm protection cap, and the waterproof is saturating Air film is set to the center of explosion-proof spool by diaphragm mounting ring, and the diaphragm protection cap is set to the outside of waterproof ventilated membrane, and film Through-hole is offered in piece protection cap.

Specifically, the other end of the valve body is equipped with the spool groove for accommodating explosion-proof spool, also sets on the valve body There is the anti-water storage tank being connected to spool groove.

Specifically, the valve body is equipped with several threaded holes.

Specifically, circumferentially arranged with external seal ring recess, external seal ring recess content is equipped with outer the end surface of the valve body Sealing ring.

Specifically, the cross section of the exterior seal ring is "convex" shaped or dolioform.

To achieve the above object, the utility model also provides a kind of inspection of the explosion-proof valve of fast aeration detection box leakproofness Survey method, it is characterised in that: include the following steps,

Step 1: the claw of Inflatable clamper is sticked into the Inflatable clamper card slot of inflation spool；

Step 2: opening air-leakage detector, the thimble of Inflatable clamper is depressed, inflates piston press compressed spring, and lead to It crosses guide post to move axially along pilot hole, rubber seal is driven to separate with aeration aperture, make box house through aeration aperture and inflation Pipe connection inflation；

Step 3: whether the pressure value or pressure difference checked on air-leakage detector are maintained at when reaching the predetermined time In claimed range, the qualified or not of air-tightness is judged；

Step 4: closing air-leakage detector after completing test, Inflatable clamper is unclamped, inflates piston in compressed spring Under elastic force effect, by guide post along the axial movement of pilot hole, rubber seal is driven to reset, aeration aperture is made to restore seal shape State.

The utility model has the beneficial effects that: the utility model inflates spool by being arranged on explosion-proof valve, from inflation Spool inflation, inflation is compared to intake velocity is fast, the used time is short from the ventilated membrane from explosion-proof valve, detection efficiency height, and will not lead Cause ventilated membrane damage, explosion-proof defective valve；Sealing detection inflates spool and explosion-proof valve together as one, is not necessarily on seal case in addition Sealing propertytest aeration aperture is opened up, after detection, inflation piston automatic-resetting is driven by spring, restores sealing state, It is not required to additionally mounted bolt to block aeration aperture, avoids that secondary seal is bad, the risk of protection level requirements is not achieved.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the explosion-proof valve of the utility model；

Fig. 2 is the explosive view of the explosion-proof valve of the utility model；

Fig. 3 is the explosive view of the inflation spool of the utility model；

Fig. 4 is the structural schematic diagram of the valve body of the utility model；

Fig. 5 is one sectional view of embodiment of the exterior seal ring of the utility model；

Fig. 6 is two sectional view of embodiment of the exterior seal ring of the utility model；

Fig. 7 is the flow chart of the inflation detection method of the utility model.

Drawing reference numeral explanation:

1- valve body；2- inflates spool；The explosion-proof spool of 3-；The explosion-proof reset spring of 4-；5- inner seal ring；6- exterior seal ring；

11- aeration aperture；12- Inflatable clamper card slot；13- opens and closes pilot hole；14- venthole；15- threaded hole；16- connection Muscle；17- spool groove；The anti-water storage tank of 171-；18- external seal ring recess；19- inner seal ring slot；

21- fixing piece；22- compressed spring；23- inflates piston；24- rubber seal；211- pilot hole；212- circle is convex Platform；231- guide post；

31- guide rod；311- flange；32- waterproof ventilated membrane；33- diaphragm mounting ring；34- diaphragm protection cap；341- is ventilative Hole.

Specific embodiment

Referring to Fig. 3, utility model provides a kind of inflation spool, the inflation spool includes fixing piece 21, compressed spring 22, piston 23, rubber seal 24 are inflated, one end of the inflation piston 23 is connect by compressed spring 22 with fixing piece 21, The other end of inflation piston 23 is connect with rubber seal 24.

In the present embodiment, one end of the inflation piston 23 is additionally provided with guide post 231, offers on the fixing piece 21 pair The pilot hole 211 that guide post 231 radially limits.

Inflation piston 23 is biased to when inflating in order to prevent, and sealing can not be resetted after inflation, is equipped with and is led on inflation piston 23 To column 231, guide post 231 passes through hollow fixing piece 21 can be up and down, inflates the accurate multiple of piston 23 after ensure that inflation Position sealing.

Fig. 1-4 is please referred to, the utility model provides a kind of explosion-proof valve of fast aeration detection box leakproofness, including valve sheet Body 1, inflation spool 2, explosion-proof spool 3, the valve body 1 are laterally equipped with Inflatable clamper card slot 12, open up on the valve body 1 There is aeration aperture 11, the inflation spool 2 includes fixing piece 21, compressed spring 22, inflates piston 23, rubber seal 24, described Fixing piece 21 is installed in one end of valve body 1, and one end of the inflation piston 23 is connect by compressed spring 22 with fixing piece 21, The other end of inflation piston 23 is connect with rubber seal 24, will inflate the rubber seal on piston 23 by compressed spring 22 24 end faces for pressing against aeration aperture 11 seal aeration aperture 11；

One end of the explosion-proof spool 3 is installed with guide rod 31, and the end of the guide rod 31 is equipped with collar flange 311, described The center of valve body 1 offers folding pilot hole 13, and valve body 1 offers venthole 14, institute along the periphery of folding pilot hole 13 Another end surfaces for stating valve body 1 are equipped with inner seal ring slot 19, accommodating in the inner seal ring slot 19 along the periphery of venthole 14 There is an inner seal ring 5, the guide rod 31 of the explosion-proof spool 3 passes through folding pilot hole 13, and is socketed on 31 surface of guide rod explosion-proof multiple Position spring 4, explosion-proof reset spring 4 is mounted between valve body 1 and flange 311, make explosion-proof spool 3 with it is interior close on valve body 1 Seal 5 fits closely, and venthole 14 is sealed.

The explosion-proof principle of the explosion-proof valve of the utility model are as follows: burst pressure, i.e., the cracking pressure of explosion-proof spool 3 is by explosion-proof multiple The elastic force control of position spring 4, can design different explosion-proof unlatching pressure values according to customer demand between 5~50kPa, and It can be controlled within standard value ± 3kpa, cracking pressure precision is high, job stability and high reliablity.Optimize as into one, institute Explosion-proof 3 cracking pressure of spool is stated, i.e. explosion-proof pressure is 6~20kPa.When the intracorporal air pressure of case is greater than default explosion-proof pressure, prevent Quick-fried spool 3 squeezes explosion-proof reset spring 4 under the action of air pressure in the case, makes guide rod 31 along the axial movement of folding pilot hole 13, Explosion-proof spool 3 is opened, and box house is in communication with the outside by the venthole 14 of explosion-proof valve, Quick air-discharge pressure release, to realize anti- It is quick-fried.After pressure release, explosion-proof spool 3 resets under the action of explosion-proof reset spring 4, restores the sealing to explosion-proof valve.

The utility model is inflated by the way that inflation spool 2 is arranged on explosion-proof valve from inflation spool 2, with the prior art from anti- Compared to intake velocity is fast, the used time is short, detection efficiency is high for inflation at the ventilated membrane of quick-fried valve, and not will lead to ventilated membrane damage, prevents Quick-fried defective valve；Sealing detection inflates spool 2 and explosion-proof valve together as one, without in addition opening up sealing propertytest on seal case With aeration aperture 11, after detection, drives inflation piston 23 to automatically reset by spring, restore sealing state, be not required in addition pacify Dress bolt blocks aeration aperture 11, avoids that secondary seal is bad, the risk of protection level requirements is not achieved.

In the present embodiment, inflates piston 23 and fixing piece 21 is equipped with round boss 212 or groove, for compressed spring 22 sets above in order to the positioning of compressed spring 22.

The valve body 1 is the square or rectangular that round or quadrangle is fillet, and what 1 center of valve body was equipped with opens Pilot hole 13 is closed, 1 frame of valve body is linked together by 3-6 dowel 16 and the folding pilot hole 13 at center, dowel 16 Between formed venthole 14.

Specifically, the explosion-proof valve is made of metal material, and wherein material is selected from aluminium alloy, magnesium alloy, kirsite or not Become rusty steel, preferably aluminium alloy or magnesium alloy.

Using the above scheme, main body uses metal material, and intensity is high, do not burn, high- and low-temperature resistance and weather resistance are good, can Effectively avoid the plastics explosion-proof valve of the prior art in explosion because high temperature causes the ventilative hole plug of softening transform, shell to lead to function Failure, even fly out the problems such as causing personnel's secondary damage under high pressure.

5 cross section of inner seal ring is the shapes such as circle, taper type, "convex" shaped, dolioform, interior close as optimization 5 advantageous cross sections of seal are circular sealing ring, and hardness is shore 25A~65A, is mounted in the interior seal groove of valve body 1, are used It is sealed between explosion-proof spool 3 and valve body 1.

Specifically, the explosion-proof spool 3 includes waterproof ventilated membrane 32, diaphragm mounting ring 33, diaphragm protection cap 34, described anti- Water ventilated membrane 32 is set to the center of explosion-proof spool 3 by diaphragm mounting ring 33, and the diaphragm protection cap 34 is set to waterproof ventilated membrane 32 outside, and through-hole is offered in diaphragm protection cap 34.

In the prior art, using the explosion rupture disk of metal or plastics as explosion-proof component, seal case under normal operating conditions It is completely airtight, cause cabinet external and internal pressure uneven after temperature change, and then influence battery or control system in seal case Functional reliability and service life, and explosion rupture disk burst pressure is generally large, keeps pressure limit when its explosion larger, quick-fried Broken pressure precision is poor.The utility model on explosion-proof spool 3 by being arranged waterproof ventilated membrane 32, and air pressure is less than default in the case When explosion-proof pressure, gas can be in communication with the outside by waterproof ventilated membrane 32 in case, realized waterproof and breathable function, made inside and outside cabinet Air pressure keeps balance.Film is installed on the surface of diaphragm by external force damage in order to prevent waterproof ventilated membrane 32 in use process Piece protection cap 34 is provided with one or more air holes 341 in diaphragm protection cap 34, and wherein 341 diameter of air hole isPreferably

The explosion-proof valve of the prior art punctures the structure setting of film using cone bottom thimble, play to a certain extent it is ventilative and Explosion-proof effect, but its structure is relative complex, and explosion-proof is the protrusion that deforms under pressure by ventilated membrane (air-permeable paper) It is punctured and is implemented by taper thimble, the accuracy rate of explosion is poor, and stability is bad, and detecting burst pressure is destructive testing (explosion be disposable, diaphragm is punctured rear damage of product and loses function), can not examine in batches in manufacturing process and shipment, There are biggish quality risks.

And the utility model explosion-proof spool 3 in explosion is opened, waterproof ventilated membrane 32 will not be punctured, be damaged, therefore made It 100% can test during making, it is ensured that explosion-proof pressure meets the requirements.Explosion-proof spool 3 automatically resets after pressure release, restores anti- Water airing function, waterproof ventilated membrane 32 can continue to use.

Specifically, the other end of the valve body 1 is equipped with the spool groove 17 for accommodating explosion-proof spool 3, on the valve body 1 It is additionally provided with the anti-water storage tank 171 of connection spool groove 17 and 1 side of valve body.

Using the above scheme, when air pressure is less than default explosion-proof pressure in the case, explosion-proof spool 3 is placed in spool groove 17 It is interior, it flushes the outer end face of explosion-proof spool 3 with the outer end face of valve body 1 or the outer end face of slightly below valve body 1, guarantees explosion-proof valve Flat appearance as a whole reduces a possibility that explosion-proof spool 3 is damaged.The anti-water storage tank 171 being connected to spool groove 17 Hydrophobic effect can be played, when the liquid such as extraneous rainwater splash on explosion-proof valve, liquid can be along anti-water storage tank 171 quickly Outflow, prevents ponding, furthermore can also prevent dust accumulation.

Specifically, the valve body 1 is equipped with several threaded holes 15.

Using the above scheme, the valve body 1 is equipped with 4 threaded holes 15 along the periphery of spool groove 17, and wherein screw thread is straight Diameter is M3~M10, preferably M4~M6, and 4 screw installations can be used to be fixed on cabinet.The installation nut of prior art products is It is embedded in plastic part, and the installation screw thread of the utility model is directly process on valve body 1, the two is integrated, by force Degree is high, and anti-impact force is big at high temperature, will not fall off and flies out in battery explosion, securely and reliably.

Specifically, the end surface of the valve body 1 is circumferentially arranged with external seal ring recess 18, the interior accommodating of external seal ring recess 18 There is exterior seal ring 6.

Using the above scheme, the exterior seal ring 6 be mounted in the close slot of valve body 1 cross section be circle, taper type, The shapes such as "convex" shaped, dolioform, hardness are shore A30~75 degree, are mounted in the interior seal groove of valve body 1 for when using With box sealing.

As advanced optimizing, Fig. 5-6 shows two kinds of preferred embodiments of exterior seal ring 6, and exterior seal ring 6 is cross section In " convex " font or it is intermediate be dolioform special-shaped seal ring, hardness is shore 40A~70A, when for using and box sealing.

Preferably in dolioform or its deformation sealing ring, deflection is big using intermediate for exterior seal ring 6, after installation explosion-proof valve with Box body tightness is good, does not leak outside, and exterior seal ring 6 will not be weighed wounded by the external seal ring recess 18 on valve body 1.

In the present embodiment, the material of the exterior seal ring 6 and inner seal ring 5 is selected from silicon rubber, ethylene propylene diene rubber, fluorine rubber One of glue, nitrile rubber or hydrogenated nitrile-butadiene rubber, wherein exterior seal ring 6 can be identical with 5 material of inner seal ring, can also not It is identical.

Specifically, the waterproof ventilated membrane 32 is PP or PET backing material and E-PTFE composite material, or sintering PTFE Microporous barrier.

The product of the utility model can also use the waterproof and breathable of other seal boxs and explosion-proof in addition to it can be used for battery pack.

Referring to Fig. 7, to achieve the above object, the utility model also provides a kind of fast aeration detection box leakproofness The detection method of explosion-proof valve, comprising the following steps:

S1, the claw of Inflatable clamper is sticked into the Inflatable clamper card slot 12 of inflation spool 2；

S2, air-leakage detector is opened, depresses the thimble of Inflatable clamper, inflation piston 23 squeezes compressed spring 22, and leads to It crosses guide post 231 to move axially along pilot hole 211, drives rubber seal 24 to separate with aeration aperture 11, make box house through filling Stomata 11 is connected to inflation with gas tube；

S3, when reaching the predetermined time, whether the pressure value (or pressure difference) checked on air-leakage detector, which is maintained at, is wanted It asks in range, judges the qualified or not of air-tightness；

S4, after completing test, air-leakage detector is closed, unclamps Inflatable clamper, inflate piston 23 in compressed spring 22 Under elastic force effect, by guide post 231 along the axial movement of pilot hole 211, drives rubber seal 24 to reset, make aeration aperture 11 Restore sealing state.

Wherein, the specific steps for connecting air-leakage detector include: to open air-leakage detector power supply, according to cabinet size 10~300S of inflationtime, 5~240S of dwell time are set, compressed air is connected；

It first allows inflation bolt corresponding with 2 locality of inflation spool on explosion-proof valve, then the claw of Inflatable clamper is sticked into anti- In the card slot of quick-fried valve；

Gas tube is inserted into quick coupling, pressure inflation bolt opens inflation spool 2, air-leakage detector opened, with 3 The test of~20KPa pressure inflatable.

Judge the standard of air-tightness are as follows: when reaching the predetermined time, if pressure value is maintained in claimed range, then show case Body good seal.

Embodiment of above is only that preferred embodiments of the present invention are described, not to the utility model Range be defined, under the premise of not departing from the spirit of the design of the utility model, this field ordinary engineering and technical personnel to this The various changes and improvements that the technical solution of utility model is made should all fall into the guarantor that claims of the utility model determine It protects in range.

Claims (9)

1. a kind of inflation spool, it is characterised in that: the inflation spool includes that fixing piece, compressed spring, inflation piston, rubber are close One end of sealing, the inflation piston is connect by compressed spring with fixing piece, and the other end and rubber seal of piston are inflated Connection.

2. inflation spool according to claim 1, it is characterised in that: one end of the inflation piston is additionally provided with guide post, The pilot hole radially limited to guide post is offered on the fixing piece.

3. a kind of explosion-proof valve of fast aeration detection box leakproofness, it is characterised in that: including valve body, inflate spool, explosion-proof Spool, the valve body are laterally equipped with Inflatable clamper card slot, and aeration aperture, the inflation spool packet are offered on the valve body Fixing piece, compressed spring, inflation piston, rubber seal are included, the fixing piece is installed in one end of valve body, and the inflation is lived One end of plug is connect by compressed spring with fixing piece, and the other end for inflating piston is connect with rubber seal, by compressing bullet The end face that rubber seal on inflation piston presses against aeration aperture seals aeration aperture by spring；

One end of the explosion-proof spool is installed with guide rod, and the end of the guide rod is equipped with flange, and the center of the valve body opens up There is folding pilot hole, valve body offers venthole along the periphery of folding pilot hole, and another end surfaces of the valve body are along logical The periphery of stomata is equipped with inner seal ring slot, is equipped with inner seal ring in the inner seal ring slot, the guide rod of the explosion-proof spool is worn Cross folding pilot hole, and be socketed with explosion-proof reset spring on guide rod surface, explosion-proof reset spring be mounted on valve body and flange it Between, it is bonded explosion-proof spool with the inner seal ring on valve body, by vent seal.

4. the explosion-proof valve of fast aeration detection box leakproofness according to claim 3, it is characterised in that: the inflation is lived One end of plug is additionally provided with guide post, and the pilot hole radially limited to guide post is offered on the fixing piece.

5. the explosion-proof valve of fast aeration detection box leakproofness according to claim 3, it is characterised in that: the explosion-proof valve Core further includes waterproof ventilated membrane, diaphragm mounting ring, diaphragm protection cap, and the waterproof ventilated membrane is set to explosion-proof by diaphragm mounting ring The center of spool, the diaphragm protection cap are set to the outside of waterproof ventilated membrane, and offer through-hole in diaphragm protection cap.

6. the explosion-proof valve of fast aeration detection box leakproofness according to claim 3, it is characterised in that: the valve body The other end be equipped with the spool groove for accommodating explosion-proof spool, be additionally provided with the anti-ponding being connected to spool groove on the valve body Slot.

7. the explosion-proof valve of fast aeration detection box leakproofness according to claim 3, it is characterised in that: the valve body It is equipped with several threaded holes.

8. the explosion-proof valve of fast aeration detection box leakproofness according to claim 3, it is characterised in that: the valve body End surface circumferentially arranged with external seal ring recess, external seal ring recess content is equipped with exterior seal ring.

9. the explosion-proof valve of fast aeration detection box leakproofness according to claim 8, it is characterised in that: the external seal The cross section of circle is "convex" shaped or dolioform.