CN207137170U - Eebd - Google Patents

Abstract

The utility model discloses a kind of EEBD, including compressed air bottle and head-shield, gas cylinder pressure-reducing valve is installed in the bottleneck of compressed air bottle, gas cylinder pressure-reducing valve includes valve seat and loaded on the piston seat on valve seat, and valve rod is provided with piston seat；Safe valve element is housed on piston seat, safety valve spring is supported with safe valve element；Flow-rate adjustment bolt is provided with low-pressure connector, alarm air flue is provided with valve seat, the alarm air flue leads to alarm whistle, and alarm air flue is located at the top sealed under piston；Head-shield is connected with oronasal mask by breathing valve seat；Cameral mantle is installed with by cameral mantle bar on breathing valve seat, air chamber is formed between cameral mantle and air supply pipe, air chamber is connected by by-pass prot with air supply pipe gas circuit；Expiration diaphragm is also movably set with breathing valve seat, the expiration hole site breathed on valve seat is corresponding with expiration diaphragm.The EEBD not only has the gentle adjustment of normality leak protection, and uses comfortable safety.

Description

EEBD

Technical field

It the utility model is related to a kind of personal protection air respiratorresuscitator, more particularly to it is a kind of in fire, dust and poisonous Wait the air respiratorresuscitator in emergency circumstances used for survivor in gas scene.

Background technology

Emergency escape air respiratorresuscitator is the individual promptly fled from from fire, dust and toxic gas scene for survivor Respiratory protection equipment, at the disastrous scene such as most of fire, big fire is not to cause the main original of Field Force's injures and deaths in itself Cause, the personnel amount directly burnt to death by a naked light often only seldom part for fire casualty quantity.Most personnel are dead Die and caused by following reason, first, being stranded by dense smoke and losing escape chance, and then suffocate and die；Second, largely exist in smog Toxic and harmful gas cause personnel be poisoned and die.If disaster affected people can breathe high quality air in scene of fire, from And it is clearheaded, just there is time enough to select correct escape route, to implement self-help escape.

Emergency escape is with air respiratorresuscitator typically by compressed air bottle, gas cylinder pressure-reducing valve and respirator mask positioned at bottle head Form.Storage has high pressure air of the pressure for 21Mpa or so in its compressed gas cylinder, and pressure-air during use in gas cylinder is through gas In the head-shield for transferring to protection head after pressure-reducing valve decompression on bottle by appendix so that user can breathe fresh air. Gas cylinder pressure-reducing valve and respirator mask are its critical components in above-mentioned air supply system.

Gas cylinder pressure-reducing valve is mostly to be balanced each other by the gas pressure and spring force that act on relief piston to control at present Overflow effect processed, to reach decompression purpose.But because the compressed air bottle actually most of the time of air respiratorresuscitator is all located In off working state, therefore compressed air in gas cylinder is always through seepage at leisure between high pressure air flue and the pressure regulation block of piston end In decompression air cavity above to piston, and elapse, should be at originally above the piston of low-pressure state in decompression air cavity over time Air pressure is gradually risen to high pressure conditions, the even up to air pressure in compressed air bottle, and this pressure is sufficient so that gas cylinder The valve body and valve seat of pressure-reducing valve burst apart, and this not only causes the damage even total waster of gas cylinder pressure-reducing valve, causes equipment and personnel Security incident, and this damage can cause compressed air fast leak in gas cylinder, make to use air in the case of emergency escape The survivor of respirator is supplied without air, and high risks are caused to personal safety.It is different under escape and normal operating condition User and different labor intensity its air consumption have obvious difference, and the air demand and supply of existing air respiratorresuscitator Pressure is that homeostasis is constant, and air demand and supply gas pressure can not be adjusted, and can form serious discomfort during use, directly affect use The operation and operation of person, also brings along potential safety hazard.Existing gas cylinder pressure-reducing valve is not provided with low-pressure alarming device, or provided with low Press warning device its gas circuit design unreasonable, make low pressure alarming accurate not in time, increase the insecurity of user.

The respirator that specialty is not often had due to the user for air respiratorresuscitator of escaping uses technical ability, directly for using The respirator mask of person's breathing seems particularly important to the security and comfortableness that use.Include one on respirator mask body to regard Window, steam supply valve and outlet valve, user's respirator mask during escape can give escape personnel head to provide an opposing seal Protection, the face and face for making people escape injury, and its form is used for making one to keep good sight, steam supply valve in escape process It is connected by air supply pipe and valve body with compressed air to provide required breathing air to survivor, outlet valve is used for breathing out people Outside gas discharge mask.And the steam supply valve and outlet valve on existing respirator mask are all by the expiration of people and air-breathing control Close or open with driving, to control the supply of air and exhalation.The inspiratory resistance that such structure has inlet valve is big, with this Outlet valve can not be closed reliably simultaneously, cause that the pernicious gas of scene of fire can be sucked in breathing process, gently then be made User is caused using uncomfortable, personal safety that is heavy then threatening user.Existing respirator mask overall weight is larger simultaneously, The burden and discomfort of user is increased, is added using difficulty.

Utility model content

For the above-mentioned deficiency present in prior art, technical problem to be solved in the utility model is to provide a kind of tool There is the gentle adjustment of normality leak protection, using comfortable safe EEBD.

In order to solve the above-mentioned technical problem, EEBD of the present utility model, including compressed air bottle and head-shield, Gas cylinder pressure-reducing valve is installed in the bottleneck of compressed air bottle, is provided with breather valve and form on head-shield, the breather valve passes through supply Flexible pipe is connected with gas cylinder pressure-reducing valve, and the gas cylinder pressure-reducing valve includes valve seat and loaded on the piston seat on valve seat, valve seat and work Relief piston is provided between obturating plug, pressure spring is supported between relief piston and valve seat, valve rod is provided with piston seat, Low-pressure connector is also associated with piston seat, low pressure air flue is provided with the low-pressure connector；Equipped with safety on the piston seat Valve element, safety valve spring is supported with safe valve element；Flow-rate adjustment bolt is provided with the low-pressure connector, the Flow-rate adjustment The position of bolt is corresponding with low pressure air flue, and the piston bar portion position of the relief piston, which is provided with piston, to be sealed, in valve seat Alarm air flue is provided with, the alarm air flue leads to alarm whistle, and alarm air flue is located at the top sealed under piston；The head-shield passes through Breathing valve seat is connected with oronasal mask；Air supply pipe is fixedly connected with the breathing valve seat, the air supply pipe leads to oronasal mask；Breathing Cameral mantle is installed with by cameral mantle bar on valve seat, air chamber is formed between cameral mantle and air supply pipe, the air chamber passes through By-pass prot is connected with air supply pipe gas circuit；Expiration diaphragm is also movably set with breathing valve seat, the expiration diaphragm and breather valve Expiration diaphragm spring is supported between seat, the expiration hole site breathed on valve seat is corresponding with expiration diaphragm；In cameral mantle with exhaling Pneumatic jacking block is provided between air film piece.

In said structure, due to being equipped with safe valve element on the piston seat of gas cylinder pressure-reducing valve, and supported on safe valve element Have safety valve spring, safe valve element and safety valve spring constitute gas circuit safety valve, when respirator gas cylinder be in it is non-use it is normal In the case of state, once the pressure-air in gas cylinder leaks to relief chamber above piston, and when raising its air pressure, with the decompression gas The safe valve element that chamber interlinks is acted by jack-up, makes the gases at high pressure release in relief chamber, this not only protects gas cylinder to depressurize Valve is not burst apart and damaged by gases at high pressure, and highly desirable protects gas cylinder safely, safe to use and personal safety.And by In being provided with Flow-rate adjustment bolt on the low pressure duct position in low-pressure connector, this structure allow user according to its from Body situation and labor intensity and adjust the air demand to air-supply mask, both ensure that comfort, enhance again safe to use Property.Due to being provided with alarm air flue on valve seat, the alarm gas passage so connects to alarm whistle in gas cylinder mesohigh compressed air Near with completion, the gas circuit for leading to mouthpiece is automatically switched on, and mouthpiece ring is alarmed, and compressed air will in prompting user's gas cylinder It is finished, so as to protect the security of user.Due also to double diaphragm structures that gas stops up film and expiration diaphragm are employed, and air chamber Air chamber is formd between film and air supply pipe, the air chamber is connected with air supply pipe gas circuit again, when the wearer inhales the air, fresh air warp Air supply pipe flows to oronasal mask and supplied, while fresh air with pressure is also entered in air chamber through air supply pipe, promote cameral mantle and Pneumatic jacking block moves to left, and pneumatic jacking block promotes expiration diaphragm to move to left and cross exhaling hole, blocks between exhaling hole and oronasal mask Communication path is so as to completing air-breathing；And upon exhalation, the breath pressure and spring force of user then promote expiration diaphragm to move to right, and make Obtain mouth and nose cover chamber to lead to exhaling hole and discharge waste gas, by the setting of air supply pipe by-pass prot in the structure, by air supply pipe pressure Dynamic cameral mantle and expiration motion of membrane are pushed to implement the closing of exhaling hole or opening, user does not need specialized training just can be ripe Practice and use, use is more comfortable, safer.The structure has been greatly simplified supply, expiration structure, not only compact-sized conjunction Reason, it is safe and convenient to use, and also weight, convenient wear use.

Further embodiment of the present utility model, the front end of the safe valve element seal equipped with safety valve, safety valve bullet Spring is loaded on the rear end of safe valve element, and the front end chamber of safe valve element is connected with the relief chamber above the piston pan portion of relief piston It is logical.It is simple and reasonable, action accurately and reliably, can in time to piston above relief chamber gases at high pressure progress release.

Further embodiment of the present utility model, the Flow-rate adjustment bolt are fastened in low-pressure connector, and the flow is adjusted Low pressure air flue is stretched in the front end of section bolt.It is simple in construction, it can easily carry out the regulation of gas supply flow.

Preferred embodiment of the present utility model, it is provided with and lives between the piston plate portion position of the relief piston and piston seat Seal beyond the Great Wall, the pressure spring is supported in the pressure spring chamber of valve seat, and alarm air flue leads to alarm through the pressure spring chamber The whistle.Low pressure alarming can accurately be carried out.

Preferred embodiment of the present utility model, the piston bar portion lower end of the relief piston is equipped with pressure regulation block, in pressure regulation The core position of piston is provided with relief passage, and pressure regulation block is located at the upper port of high pressure air flue on valve seat.The structure, which can be realized, to be subtracted The stabilization function of the high pressure of pressure valve.

Further embodiment of the present utility model, valve rod spring is provided between the valve rod upper end and valve rod base, should Valve rod base is installed on piston seat by plate seat, and cocker is inserted with plate between plate seat and valve rod base.The structure can be real The quick of existing high pressure air bottle opens or closes, and is more suitable for promptly using.

Preferred embodiment of the present utility model, filter is installed on breathing valve seat, the filter is located at air supply pipe Lead in the gas circuit of oronasal mask.On the one hand air with pressure effectively reduces supply whistler, on the other hand again after filter block There is further decompression and cross air filtering.

Preferred embodiment of the present utility model, the pneumatic jacking block are slidably supported on cameral mantle bar.The expiration Diaphragm is fixedly connected on central spindle of the spring by expiration diaphragm seat, and the front end of the central spindle of the spring is fixedly connected on pneumatic jacking block, The rear end of central spindle of the spring is slidably supported on breathing valve seat through expiration diaphragm spring.This is simple and reasonable, convenient manufacture dress Match somebody with somebody.

Further embodiment of the present utility model, neck elastic cover is additionally provided with the head-shield, the neck elastic cover is close Envelope is connected on head-shield.It can effectively prevent the leakage of air in cover and the infiltration of the outer pernicious gas of cover, it is safe to use, conveniently.

Brief description of the drawings

The utility model EEBD is described further with reference to the accompanying drawings and detailed description.

Fig. 1 is a kind of structural representation of embodiment of the utility model EEBD；

Fig. 2 is the mplifying structure schematic diagram of breather valve in Fig. 1 illustrated embodiments；

Fig. 3 is the mplifying structure schematic diagram of gas cylinder pressure-reducing valve in Fig. 1 illustrated embodiments.

In figure, 1-breather valve, 101-locking primary nut, 102-breathing valve seat, 103-filter, 104-air supply pipe, 105-cameral mantle bar, 106-cameral mantle, 107-pneumatic jacking block, 108-by-pass prot, 109-air chamber, 110-supply soft Pipe, 111-exhaling hole, 112-expiration diaphragm, 113-expiration diaphragm seat, 114-locking big nut, 115-expiration diaphragm bullet Spring, 116-central spindle of the spring；

2-gas cylinder pressure-reducing valve, 201-airway tube, 202-valve seat, 203-valve base sealing, 204-inflation valve element, 205- Valve body, 206-inflation seal spool, 207-air flue of alarming, 208-pressure spring, 209-relief piston, 210-are inflated to live Sealing beyond the Great Wall, the sealing of 211-piston seat, 212-safety valve, 213-safe valve element, 214-safety valve spring, 215-safety Bonnet, 216-plate, 217-plate seat, 218-valve rod base, 219-valve rod spring, 220-valve rod, 221-low pressure air flue, 222-Flow-rate adjustment bolt, the sealing of 223-Flow-rate adjustment, 224-low-pressure connector, 225-relief passage, 226-pressure spring Sealing, 228-pressure regulation block, 229-high pressure air flue, 230-alarm whistle under chamber, 227-piston；

3-compressed air bottle, 4-air supply hose, 5-head-shield, 6-form, 7-oronasal mask, 8-neck elastic cover.

Embodiment

EEBD as shown in Figure 1, including compressed air bottle 3 and head-shield 5, in the bottleneck of compressed air bottle 3 On be installed with gas cylinder pressure-reducing valve 2, be provided with form 6 and breather valve 1 on head-shield 5, head-shield 5 is using the fire-retardant material of radiation proof Material, form 6 is anti-flaming transparent material, and oronasal mask 7 made of silicon rubber are provided with head-shield 5.Breather valve 1 on head-shield 5 It is interconnected by the gas cylinder pressure-reducing valve 2 of air supply hose 4 and the bottleneck of compressed air bottle 3.As shown in Fig. 2 the oronasal mask 7 is by exhaling Inhale valve 1 breathing valve seat 102 be mutually permanently connected, the breathing valve seat 102 be respectively equipped with it is externally threaded supply pipeline section and Expiration pipeline section, the supply pipeline section and expiration pipeline section pass through head-shield 5 and oronasal mask 7 and the locking primary nut 101 by spinning thereon Head-shield 5 and oronasal mask 7 are mutually gripped with locking big nut 114.

Breather valve as shown in Figure 2, the breather valve 1 include breathing valve seat 102, are fixedly connected with breathing valve seat 102 Air supply pipe 104, the feeding pneumatic on air supply pipe 104 is connected with the supply pipeline section on breathing valve seat 102, in the supply pipeline section Provided with filter 103, filter 103 is formed using metal powder sintered, has the function that to eliminate noise, filtration, purification air. Said structure causes air supply pipe 104 to lead to oronasal mask 7 by filter 103 and breathing valve seat 102.

Cameral mantle bar 105 is housed on breathing valve seat 102, between cameral mantle bar 105 and the outer tube wall of air supply pipe 104 Geometrical clamp is equipped with cameral mantle 106, cameral mantle 106 using ABS as diaphragm made of material, ABS be a kind of intensity height, good toughness, easily In thermoplastics type's high polymer material of machine-shaping.An air chamber 109 is formed between cameral mantle 106 and air supply pipe 104, in air supply pipe 104 are provided with by-pass prot 108, and the gas channels in air chamber 109 and air supply pipe 104 are interconnected by the by-pass prot 108.Breathing Expiration diaphragm 112 is movably set with valve seat 102, the expiration diaphragm 112 can move left and right along its axial direction.In cameral mantle bar 105 center portion position is actively supported with pneumatic jacking block 107, and pneumatic jacking block 107 can left and right shifting on cameral mantle bar 105 Dynamic, pneumatic jacking block 107 is between cameral mantle 106 and expiration diaphragm 112.Expiration diaphragm 112 is fixed by expiration diaphragm seat 113 It is connected on central spindle of the spring 116, the right-hand member of the central spindle of the spring 116 is fixedly connected on pneumatic jacking block 107, central spindle of the spring 116 Left end is slidably supported on breathing valve seat 102 through expiration diaphragm spring 115.Expiration diaphragm spring 115 is supported on expiration diaphragm Between 112 and breathing valve seat 102, the position of exhaling hole 111 breathed on valve seat 102 is corresponding with the position of expiration diaphragm 113, air-breathing When expiration diaphragm 113 move to the left side of exhaling hole 111, prevent extraneous air from entering in oronasal mask 7；Exhale upon exhalation film Piece 112 moves to the right side of exhaling hole 111, and the waste gas of user's exhalation is discharged out of oronasal mask through exhaling hole 111.

Air supply hose 4 is connected with the tail end of air supply pipe 104, the other end of the air supply hose 4 is connected to compressed air bottle 2 On gas cylinder reducing valve body.Neck elastic cover 8, the lower port of neck elastic cover 8 and head-shield 5 are provided with the lower port seat of head-shield 5 It is tightly connected, the neck elastic cover 8 is using silicon rubber as material.

Gas cylinder pressure-reducing valve as shown in Figure 3, the gas cylinder pressure-reducing valve 2 include valve seat 202, and the lower end of valve seat 202 is for twisting The threaded portion of the bottleneck of compressed air bottle 3 is connected to, twist-on has the conduit stretched into compressed air bottle 3 at the top of the lower end of valve seat 202 201, the root position in above-mentioned threaded portion is cased with valve base sealing 203.In the center of valve seat 202 high pressure is provided with along its axle center Air flue 229, the lower end of the high pressure air flue 229 are led in compressed air bottle 3 through conduit 201.

Piston seat 211 is connected through a screw thread on valve seat 202, in the chamber that valve seat 202 and piston seat 211 are formed Relief piston 209 is provided with, the " T " shape structure in section of the relief piston 209, its top is piston pan portion, and bottom is then work Stopper rod portion.The piston pan portion of relief piston 209 is actively placed in the corresponding chamber of piston seat 211 by sealing 210 on piston, The piston bar portion of relief piston 209, the base position of valve seat 202 is actively stretched into, in the pole socket and relief piston of the valve seat 202 It is provided between 209 piston bar portion under piston and seals 227,227 is sealed under the piston and is set on piston bar portion.In relief piston Top is equipped with pressure regulation block 228 under 209 bar portion, and pressure regulation block 228 is located at the upper end oral area of high pressure air flue 229, in relief piston 209 Bar core position, provided with relief passage 225, relief passage 225 leads to high voltage block 228 and the binding site of high pressure air flue 229.In valve The pole socket wall of seat 202 is provided with the alarm air flue 207 being radially arranged.Under normal condition, alarm air flue 207, which is located under piston, to be sealed 227 top, only when gas cylinder air pressure is relatively low, relief piston 209 moves up, and sealing 227 can move under piston thereon therewith The top of alarm air flue 207.Relief piston 209 and piston plate portion below and valve seat 202 between be provided with high pressure spring 208, tune Pressing spring 208 is supported in the pressure spring chamber 226 of valve seat 202, and alarm air flue 207 leads to alarm whistle through pressure spring chamber 226 230, the alarm whistle 230 is fixedly connected on valve seat 202.

Safe valve element 213 is housed on piston seat 211, the front end of safe valve element 213 seals 212 hermetically by safety valve It is supported in the safe valve opening of piston seat 211, safety spring is provided between the rear end of safe valve element 213 and safe bonnet 215 214, the safe bonnet 215 being fixedly installed on piston seat 211 is provided with the passage for leading to air.Before safe valve element 213 End chamber is connected with the relief chamber above the piston pan portion of relief piston 209.

The valve rod 220 of activity is provided with piston seat 211, valve rod is provided between the upper end of valve rod 220 and valve rod base 218 Spring 219, the valve rod base 218 are installed on piston seat 211 by plate seat 217, between the plate seat 217 and valve rod base 218 Card insertion has plate 216.As long as in use, pulling open plate 216, valve rod 220 moves up in the presence of valve rod spring 219, and causes Relief passage 225 is connected with low pressure air flue 221 and starts to supply.By lower valve rod 220 and plate 216 is inserted, valve rod 220 blocks Relief passage 225 and low pressure air flue 221, stop supply so as to close bottle valve.

Low-pressure connector 224 is installed on piston seat 211, the low-pressure connector 224 is provided with the low pressure for being used for outwards supplying Air flue 221.By Flow-rate adjustment sealing 223, hermetically twist-on has Flow-rate adjustment bolt 222 in low-pressure connector 224, and flow is adjusted Low pressure air flue 221 is stretched in the front end of section bolt 22, and the supply that regulation Flow-rate adjustment bolt 222 can change low pressure air flue 221 is cut Area, so as to have the function that to adjust gas supply flow and supply gas pressure.

Also it is separately installed with high-pressure safety valve and pressure gauge on valve seat 202, high-pressure safety valve and pressure gauge are and high pressure Air flue 229 is connected.High-pressure safety valve is made up of breaker bolt and blowout disk, and pressure gauge is used to show compressed air in gas cylinder Pressure.

It the above is only the description carried out to the utility model preferred embodiment, be not intended to limit technical side of the present utility model Case, those skilled in the art improvements introduced and conversion on the basis of major technique of the present utility model design each fall within this reality With in new protection domain.

Claims (10)

1. a kind of EEBD, including compressed air bottle（3）And head-shield（5）, in compressed air bottle（3）Bottleneck installation There is gas cylinder pressure-reducing valve（2）, head-shield（5）On be provided with breather valve（1）And form（6）, the breather valve（1）Pass through air supply hose（4） With gas cylinder pressure-reducing valve（2）It is connected, it is characterised in that：The gas cylinder pressure-reducing valve（2）Including valve seat（202）And loaded on valve seat （202）On piston seat（211）, valve seat（202）With piston seat（211）Between be provided with relief piston（209）, in relief piston （209）With valve seat（202）Between be supported with pressure spring（208）, piston seat（211）On be provided with valve rod（220）, in piston seat （211）On be also associated with low-pressure connector（224）, the low-pressure connector（224）On be provided with low pressure air flue（221）；In the piston Seat（211）It is upper that safe valve element is housed（213）, safe valve element（213）On be supported with safety valve spring（214）；Connect in the low pressure Head（224）On be provided with Flow-rate adjustment bolt（222）, the Flow-rate adjustment bolt（222）Position and low pressure air flue（221）Relatively Should, the relief piston（209）Piston bar portion position be provided with piston under seal（227）, in valve seat（202）It is provided with alarm Air flue（207）, the alarm air flue（207）Lead to alarm whistle（230）, air flue of alarming（207）Sealed under piston（227）It is upper Side；The head-shield（5）By breathing valve seat（102）It is connected with oronasal mask（7）；In the breathing valve seat（102）On be fixedly connected with Air supply pipe（104）, the air supply pipe（104）Lead to oronasal mask（7）；In breathing valve seat（102）It is upper to pass through cameral mantle bar（105）Gu Dingan County is equipped with cameral mantle（106）, in cameral mantle（106）With air supply pipe（104）Between form air chamber（109）, the air chamber（109）It is logical Cross by-pass prot（108）With air supply pipe（104）Gas circuit is connected；In breathing valve seat（102）On be also movably set with expiration diaphragm （112）, the expiration diaphragm（112）With breathing valve seat（102）Between be supported with expiration diaphragm spring（115）, breathe valve seat（102） On exhaling hole（111）Position and expiration diaphragm（112）It is corresponding；In cameral mantle（106）With expiration diaphragm（112）Between be provided with Pneumatic jacking block（107）.

2. EEBD according to claim 1, it is characterised in that：The safe valve element（213）Front end dress There is safety valve sealing（212）, safety valve spring（214）Loaded on safe valve element（213）Rear end, safe valve element（213）Front end Chamber and relief piston（209）Piston pan portion above relief chamber be connected.

3. EEBD according to claim 1, it is characterised in that：The Flow-rate adjustment bolt（222）Twist-on In low-pressure connector（224）On, the Flow-rate adjustment bolt（222）Front end stretch to low pressure air flue（221）.

4. EEBD according to claim 1, it is characterised in that：The relief piston（209）Piston plate Portion position and piston seat（211）Between be provided with piston on seal（210）, the pressure spring（208）It is supported on valve seat（202）'s Pressure spring chamber（226）In, air flue of alarming（207）Through the pressure spring chamber（226）Lead to alarm whistle（230）.

5. the EEBD according to any one of claim 1-4, it is characterised in that：The relief piston （209）Piston bar portion lower end pressure regulation block is housed（228）, in relief piston（209）Core position be provided with relief passage （225）, pressure regulation block（228）Positioned at valve seat（202）Upper high pressure air flue（229）Upper port.

6. the EEBD according to any one of claim 1-4, it is characterised in that：The valve rod（220）On End and valve rod base（218）Between be provided with valve rod spring（219）, the valve rod base（218）Pass through plate seat（217）It is installed on piston Seat（211）On, in plate seat（217）And valve rod base（218）Between cocker be inserted with plate（216）.

7. EEBD according to claim 1, it is characterised in that：In breathing valve seat（102）On be provided with Filter（103）, the filter（103）Positioned at air supply pipe（104）Lead to oronasal mask（7）Gas circuit on.

8. EEBD according to claim 1, it is characterised in that：The pneumatic jacking block（107）It is slidably supported In cameral mantle bar（105）On.

9. according to the EEBD described in claim 1,7 or 8, it is characterised in that：The expiration diaphragm（112）Pass through Expiration diaphragm seat（113）It is fixedly connected on central spindle of the spring（116）On, the central spindle of the spring（116）Front end be fixedly connected on pneumatically Jacking block（107）On, central spindle of the spring（116）Rear end pass through expiration diaphragm spring（115）It is slidably supported in breathing valve seat（102） On.

10. EEBD according to claim 1, it is characterised in that：The head-shield（5）On be additionally provided with neck pine Tight set（8）, the neck elastic cover（8）It is sealedly connected on head-shield（5）On.