CN207137167U - Positive-pressure air respirator - Google Patents

Abstract

The utility model discloses a kind of positive-pressure air respirator, including back board module and the gas cylinder assembly being fixed on back board module, the gas cylinder assembly leads to respirator steam supply valve through depressurizing valve assembly and mask air supply hose, airway tube slide is installed with respirator steam supply valve, airway tube is slidably fitted with airway tube slide；The inner of airway tube is connected with supplying the outer end of pull bar, and the inner of the supply pull bar is movably connected on lock hook, and supply extension spring is provided between lock hook and supply valve body；Lockplate is installed with supply valve body, lock hole is provided with the lockplate, the hook portion of the lock hook is corresponding with locking hole site；Hinged on supply valve body to have supply lever, the supply lever other end relative with hinge support is connected on diaphragm；Supply lever is connected with supplying the outer end in contact of pull bar.The respirator is not only active in one's movements, respiratory resistance is small, and good seal performance, suitable for various positive-pressure air respirators.

Description

Positive-pressure air respirator

Technical field

A kind of personal protection air respiratorresuscitator of fire-extinguishing and lifesaving is the utility model is related to, more particularly to one kind is in fire, powder The air respiratorresuscitator that dirt and toxic gas scene etc. in emergency circumstances use for survivor.

Background technology

Positive-pressure air respirator is fire fighter and speedily carries out rescue work rescue personnel when carrying out fire extinguishing and rescue, to prevent Suck harmful smog, poison gas, the nuisance being suspended in air or a kind of aerial respiration used under anaerobic environment Device.Positive-pressure air respirator can effectively prevent harmful poisonous gas outside mask from being invaded into cover, have higher safe to use Property and reliable protective value, it mainly include compressed air bottle, bottle head pressure-reducing valve, bear backboard and full facepiece mask, in full facepiece mask The steam supply valve equipped with the supply of breathing air into cover is gone up, steam supply valve can open or close with the breathing of user, to incite somebody to action Air after decompression is breathed by mask for people to be used.The supply stability and respiratory resistance size of steam supply valve are exhaled whole air The comfort and security reliability of haustorium seem particularly significant.

Steam supply valve is one of critical component of positive-pressure air respirator, and it is directly related to the usability of air respiratorresuscitator Can, and the breathing smoothness and security of user.Chinese utility model patent 89210025.7 discloses one kind, and " malleation is exhaled The type mechanism for positive pressure of haustorium ", it is mainly made up of diaphragm, liner plate, rocking bar, intake valve and compression spring, when user sucks sky During gas, negative suction band dynamic diaphragm and lever move downwardly together, and moving down for diaphragm promotes rocking bar to open air intake valve, supply again Valve input air into mask, this structure due to using when to promote diaphragm, lever and rocking bar successively by intake negative-pressure Supplied to open intake valve block into cover, interlinked mechanism is more, and sensitivity is low, and needs by specialized training；Especially supply is Make steam supply valve block produce slanted gap seam by rocking bar deflection to supply, it is poorly sealed, leakage is easily produced, had both been wasted fresh Air-source, the infiltration of pernicious gas may be caused again.The position opened or closed depending on rocking bar of steam supply valve in said structure, When respirator is in non-working condition, rocking bar is moved with mask or putting position may also form unstability, can still result in air inlet Valve is poorly sealed and produces leakage.Chinese utility model patent 200920126137.6 also discloses that one kind, and " positive-pressure type air is exhaled Haustorium steam supply valve ", it also includes diaphragm, piston, piston body, back-moving spring and transmission mechanism, and diaphragm passes through driver during use Structure acts on piston one end, piston other end connection valve head, and valve head controls opening or closing for valve port, although the structure has Preferable sealing property, and structure is more compact, but the complicated mechanism of valve head is controlled, transmission resistance and valve head are closed and opened Thrust it is big；Therefore respiratory resistance is larger, and adaptation population is restricted, so as to influence its practicality；Simultaneously in non-behaviour in service When, also lack effective locking to valve head, easily form valve port leakage.

Utility model content

For the above-mentioned deficiency present in prior art, technical problem to be solved in the utility model is being to provide one kind just Pressure type air respiratorresuscitator, its mask steam supply valve is not only active in one's movements, respiratory resistance is small, and good seal performance, can realize reliable Sealing locking.

In order to solve the above-mentioned technical problem, positive-pressure air respirator of the present utility model, including back board module and solid Due to the gas cylinder assembly on back board module, the gas cylinder assembly leads to respirator and supplied through depressurizing valve assembly and mask air supply hose Valve, the respirator steam supply valve are installed on mask, and the respirator steam supply valve includes supply valve body, and passes through steam supply valve top Lid is fixedly installed in the diaphragm on supply valve body, airway tube slide is installed with the supply valve body, in air guide Airway tube is slidably fitted with pipe slide, the outer end of the airway tube is provided with supply sealing gasket, and supply sealing gasket passes through sealing gasket Seat is installed on airway tube slide；It is sealed and installed with heating pipe joint on airway tube slide, the air supply channel on heating pipe joint Lead to airway tube by supplying sealing gasket；The inner of airway tube is connected with supplying the outer end of pull bar, the inner of the supply pull bar It is movably connected on lock hook, supply extension spring is installed between lock hook and supply valve body；It is fixed on supply valve body Lockplate is installed, lock hole is provided with the lockplate, the hook portion of the lock hook is corresponding with locking hole site；Supplying Hinged on valve body to have supply lever, the supply lever other end relative with hinge support is connected on diaphragm；Lever is supplied with supplying The outer end in contact of gas pull bar is connected；Latch hook push rod, the front end of latch hook push rod and locking are also movably set with supply valve body Hook is corresponding, and latch hook push rod back-moving spring is provided between latch hook push rod and supply valve body；Propped up on the airway tube slide Bypass valve rod has been held, bypass valve rod the inner is connected with gasket base, and the outer end for bypassing valve rod is connected with bypass valve hand wheel, The bypass valve hand wheel is rotatably connected on airway tube slide.

In said structure, the respirator steam supply valve on the mask of positive-pressure air respirator is due in the outer end of airway tube It is provided with supply sealing gasket, airway tube is again slidably supported on airway tube slide, as airway tube reciprocatingly slides vertically, air guide The pipe outer end mouth of pipe with supply sealing gasket be separated when then form airspace, gas circuit can be then closed when both are bonded, it is this by Airway tube is with the valve type structure of sealing gasket structure, forming reliable sealing loop wire between the airway tube mouth of pipe and supply sealing gasket, no Only so that steam supply valve ventilation is smooth, respiratory resistance is small, substantially increases usage comfort, and closes tightly, and barrier propterty is good, Reliable closing or the opening of steam supply valve can be realized.Lever pendulum is formd due to supply lever hinged on supply valve body again Activity supporting point, supply lever the other end be then connected to user breathe and on the diaphragm back and forth agitated, during expiration in steam supply valve Pressure increase causes diaphragm outwards to agitate, and diaphragm is pressed close to supply sealing gasket to cut off gas circuit by supplying lever pushing airway tube；Inhale Diaphragm inwardly moves during gas, and airway tube causes the airway tube mouth of pipe to leave supply sealing gasket by supply extension spring, is formed between the two Supply gap, fresh air by the gap to user provide fresh air, by supply lever power amplification, easily Respiratory movement can by leverage promote airway tube move, be effectively improved the autokinesis of airway tube, lead Tracheae movement is flexible, reduces respiratory resistance.Due also to being fixed with lockplate on supply valve body, the lockplate is provided with lock Determine hole, the hook portion of lock hook can be caught in lock hole just at the right time, when steam supply valve is in non-working condition, promote latch hook pushrod advances So that the hook portion of lock hook is caught in the lock hole of lockplate, airway tube is closely attached on supply by lock hook all the time by supplying pull bar On sealing gasket, steam supply valve is in reliable closed mode, realize effective airtight lock, and steam supply valve needs to enter and uses shape During state, the diaphragm inwardly agitated touches the hook portion top of lock hook, and the hook portion of lock hook is deviate from from lock hole, into normal Supply state is breathed, the mechanism can be realized and is locked and closed, and be easy to open and use again, and delicate structure is easy to use, in this practicality In new steam supply valve, due to being supported with the bypass valve rod of connection supply sealing gasket on airway tube slide, in emergency circumstances lead to Cross and turn bypass valve hand wheel bypass valve rod can be made to drive gasket base and supply sealing gasket thereon to leave airway tube, compression is empty Novel air in gas cylinder, which unimpededly can enter to breathe for people in mask, to be used, without the valve by airway tube, sealing gasket composition The control of structure, so when air valve breaks down, still ensure that the user in critical environment sucks fresh air, greatly Enhance the security reliability used greatly.Respirator steam supply valve structure design of the present utility model is exquisite, and flexible movements are reliable, exhale Suction drag is small, safe and reliable.

The utility model further embodiment, the decompression valve assembly are installed on the position of bottleneck of gas cylinder assembly, Depressurize and be provided with pressure-air interface and low-pressure air interface on the valve body of valve assembly, the pressure-air interface is reported with residual gas display Alarm device is connected；Mask air supply hose is parallel with the low-pressure air interface and he rescues air supply pipe.The structure can be timely Compressed air surplus in user's gas cylinder is reminded, so as to protect the security of user；And can two people when critical share a pressure Contracting gas cylinder, implement him and rescue.

The utility model further embodiment, digital indicator is installed on the mask.Make user low Head, the important informations such as gas cylinder behaviour in service are seen with regard to energy mask window clearly, to ensure the security of user.

Preferred embodiment of the present utility model, mounting hole is provided with the lock hook, supplies the inner clamping of pull bar In the mounting hole of lock hook, it is inner that pull bar stage clip is supported on supply pull bar；It is described supply lever by lever support it is hinged in Supply on valve body；Supply lever seat is installed, supply lever is connected on supply lever seat on the diaphragm.On lock hook Mounting hole and pull bar stage clip can ensure under behaviour in service, and airway tube is bonded with supply the tight of sealing gasket during expiration, so as to carry Its high sealing property, the structure also improve its assembly performance, are easy to manufacture and assemble.This is simple and reasonable, is easy to make And assembling.

Further embodiment of the present utility model, ring-type air supply channel is provided with the airway tube slide, in the ring The both sides of shape air supply channel are respectively arranged with sealing ring, and the heating pipe joint is hermetically installed on airway tube slide by the sealing ring On, the air supply channel of heating pipe joint is connected with the air supply channel on airway tube slide.Sealing structure advantages of simple, and lead to Heating pipe joint is crossed to the multi-direction flexibly supply of steam supply valve.

Further embodiment of the present utility model, the bypass valve rod are hermetically supported on airway tube by valve stem seal On slide, equipped with bypass stage clip on bypass valve rod；Positioning ratchet wheel ratchet is housed between the bypass valve rod and bypass valve hand wheel Mechanism.It is rational in infrastructure, it is easy to use and operates.

Preferred embodiment of the present utility model, the back board module includes backboard body, in the line of symmetry of backboard body Position is provided with backboard convex tendon, and gas cylinder upper bracket and gas cylinder undersetting are respectively arranged with backboard convex tendon；Set in backboard body It is equipped with and carries a bottle hand hole, the lower end of backboard body is installed with barge bumpar；Waistband and gas cylinder are also associated with backboard body Fixing band, the waistband are connected with waist cushion by bustle cingulum, and shoulder cushion is connected with shoulder belt；One end connection of shoulder belt In backboard body upper end, the other end of shoulder belt is connected on waistband.Due to being provided with backboard in backboard body in said structure Convex tendon, and gas cylinder upper bracket and gas cylinder undersetting are provided with backboard convex tendon, the setting of one side backboard convex tendon not only improves The rigidity and intensity of backboard, fixed for gas cylinder and secure support is provided；And the setting of backboard convex tendon can mitigate the weight of backboard And materials, effectively mitigate user and move burden, improve operation comfort level and the activity duration of user；Another aspect backboard is convex The upper and lower bearing of gas cylinder and gas cylinder fixing band on muscle can form the reliable fixation to gas cylinder, on gas cylinder the setting of undersetting change Uncertainty of the conventional backing plate to gas cylinder supporting and fixing so that the fixation to gas cylinder is more firm, avoid gas cylinder in use from existing Rocking on backboard, both increases usage safety performance, also improves comfort.Again due to corresponding to position in shoulder belt and with waistband Put and be additionally arranged shoulder cushion and waist cushion, avoid the Le of shoulder belt and waistband and human body from compeling sense, ensure brace and waistband and people The abundant fitting of body, gas cylinder is avoided to rock more comfortable to steady caused sense of discomfort, wearing under toter's center of gravity.More due to The lower end of backboard body is installed with barge bumpar, and is additionally provided with backboard body and carries a bottle hand hole, in backboard body Carry a bottle hand hole convenient use person to lift and wear air respiration device, be easy to grab by gripping, and positioned at backboard body lower end It barge bumpar, can effectively mitigate the impact endurance test shock for unloading when bearing backboard body and ground, both prevent gas cylinder on backboard Movement channels bit, and more avoids gas cylinder body and bottle head pressure regulator valve to hidden danger caused by the impact failure of ground.Therefore this practicality New back board module not only lifts conveniently, and wearing is born comfortably, and can form effective protection to gas cylinder body and backboard, makes With safer.

Further embodiment of the present utility model, bottle valve bearing is provided with the backboard body, the bottle valve branch Seat is located at the top of barge bumpar.Reliable fixed and effectively protection can be carried out to gas cylinder and bottle valve.

Preferred embodiment of the present utility model, the shoulder belt have two, and two shoulder belts are respectively positioned at backboard body Both sides；The band edge of the waistband extends to the both sides of backboard body respectively, and buckle is housed in the band edge of waistband；The waist cushion Penetrated from the waistband position of backboard body side to another half waistband of backboard body.Shoulder belt bears a heavy burden uniformly, bears light comfortable； Bear fixed, bear comfortable.

Further embodiment of the present utility model, two band edges of the gas cylinder fixing band are respectively to the both sides of backboard body Extension, one end of the gas cylinder fixing band is connection ring, and the other end of gas cylinder fixing band is connected with seta hasp；Propped up on the gas cylinder The position of seat is corresponding with gas cylinder fixing band position.It can realize that reliable support is fixed to gas cylinder, and be fixed conveniently.

Brief description of the drawings

The utility model positive-pressure air respirator 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 positive-pressure air respirator；

Fig. 2 is the structural representation under respirator steam supply valve use state in the utility model positive-pressure air respirator；

Fig. 3 is structural representation of respirator steam supply valve shown in Fig. 2 in the case where locking non-behaviour in service；

Fig. 4 is a kind of structural representation of embodiment of the utility model positive-pressure air respirator dorsulum component Figure；

Fig. 5 is A-A cross-section structures enlarged diagram in structure shown in Fig. 4；

Fig. 6 is B-B cross-section structures enlarged diagram in structure shown in Fig. 4.

In figure, 1-gas cylinder assembly, 2-back board module, 201-backboard body, 202-bustle cingulum, 203-waistband, 204-waist cushion, 205-gas cylinder fixing band, 206-seta hasp, 207-shoulder cushion, 208-shoulder belt, 209-gas cylinder Upper bracket, 210-connection ring, 211-backboard convex tendon, 212-carry a bottle hand hole, 213-buckle, 214-gas cylinder undersetting, 215-bottle valve bearing, 216-barge bumpar, 3-decompression valve assembly, 4-he rescues steam supply valve, 5-mask air supply hose, 6- Respirator steam supply valve, 601-supply valve body, 602-latch hook push rod back-moving spring, 603-latch hook push rod, 604-supply are drawn Spring, 605-diaphragm, 606-bail, 607-steam supply valve top cover, 608-top cover dividing plate, 609-top cover stomata, 610-confession Gas lever seat, 611-lock hook, 612-pull bar stage clip, 613-supply lever, 614-pull bar waist hole, 615-supply pull bar, 616-lever support, 617-airway tube slide, 618-airway tube, 619-slide sealing ring, 620-supply sealing gasket, 621-gasket base, 622-bypass stage clip, 623-bypass valve hand wheel, 624-bypass valve rod, 625-jump ring, 626-bypass Top cover, 627-valve stem seal, 628-heating pipe joint, 629-lock hole, 630-lockplate, 631-mask valve seals, 7-mask, 8-digital indicator, 9-residual gas display alarm.

Embodiment

Positive-pressure air respirator as shown in Figure 1, including back board module 2, bundled fixed has gas cylinder on back board module 2 Assembly 1, decompression valve assembly 3 is installed on the gas cylinder mouth of gas cylinder assembly 1, high pressure sky is provided with the valve body of decompression valve assembly 3 Gas interface and low-pressure air interface, the pressure-air interface are connected with residual gas displaying alarm 9；On low-pressure air interface simultaneously It is associated with mask air supply hose 5 and he rescues air supply pipe 4.Compressed air is through depressurizing valve assembly 3 and mask air supply hose in gas cylinder assembly 1 5 lead to respirator steam supply valve 6, are installed in respirator steam supply valve 6 by mask valve seals 631 on mask 7.Mask supply is soft One end of pipe 5 is connected on the low-pressure air interface of decompression valve assembly 3, and the other end is connected to the air supply pipe of respirator steam supply valve 6 On joint 628.Digital indicator 8 is housed, the digital indicator 8 is HUD new line digital indicators, positioned at mask 7 on mask 7 Mask form below.

The breathing steam supply valve 6 of positive-pressure air respirator as shown in Figure 2, it includes the supply valve body being made of injected plastic 601, in tubular construction, O-ring seal by the tube and thereon is by steam supply valve clamping for the lower end of the supply valve body 601 In on mask body.The upper oral part of supply valve body 601 is provided with diaphragm 605, supplies and is additionally provided with above the oral area of valve body 601 Steam supply valve top cover 607, the geometrical clamp of diaphragm 605 is supplied by valve body loaded on supply valve body 601 by steam supply valve top cover 607 601 and steam supply valve top cover 607 thereon be mutually permanently connected by bail 606.If it is provided with the top of steam supply valve top cover 607 Dry top cover stomata 609, the inner side of steam supply valve top cover 607 is provided with top cover dividing plate 608.

Airway tube slide 617 is installed with the leftward position of supply valve body 601, the airway tube slide 617 is substantially Cylindrical structure, center line of its center line perpendicular to the supply pipe portion of valve body 601.In the middle section of airway tube slide 617 Put the air supply channel that outside is provided with ring-type.The bottom land of the air supply channel is provided with some passages through airway tube slide wall, ring The both sides of shape air supply channel are mounted on slide sealing ring 619, and slide sealing ring 619 is O-ring seal, heating pipe joint 628 are hermetically installed on airway tube slide 617 by two slide sealing rings 619, the tubulose air supply channel of heating pipe joint 628 It is connected with the ring-type air supply channel of airway tube slide 617, the tubulose air supply channel central axis of heating pipe joint 628 is in leading The pipe portion center line of tracheae slide 617.Heating pipe joint 628 is connected by air supply hose with the pressure regulator valve on compressed air bottle It is logical.

Airway tube 618 is slidably fitted with the core position of airway tube slide 617, airway tube 618 is circular tube shaped metal tube, The right side outer end nozzle position of airway tube 618 is provided with supply sealing gasket 620, supply sealing gasket 620 passes through gasket base 621 Movably supporting is installed on airway tube slide 617.Gasket base 621 is fixedly installed in the left position of bypass valve rod 624, Bypass valve rod 624 is seal-installed on position on the right side of the pore of airway tube slide 617 by valve stem seal 627.In airway tube slide Leading to screw thread twist-on on 617 has bypass valve hand wheel 623, and bypass valve rod 624 is fixedly connected by jump ring 625 with bypass valve hand wheel 623, In the outer end of bypass valve hand wheel 623 equipped with bypass top cover 626, bypass stage clip 622 is set with bypass valve rod 624, is being bypassed The conventional ratchet and pawl arrangement for being used for positioning locking is housed between valve rod 624 and bypass valve hand wheel 623.Turn bypass valve hand wheel 623 can drive bypass valve rod 624 to make it axially movable；Ratchet and pawl arrangement can be by bypass valve rod or bypass valve hand wheel 623 are locked on certain position.

The inner of airway tube 618 is connected with supply pull bar 615, and the bar outer end bending of supply pull bar 615 is in 90 °, and from pipe It is interior to be extended through corresponding blocked hole on the tube wall of airway tube 618 on the outside of tube wall.Mounting hole is provided with lock hook 611, is supplied The inner of pull bar 615 is movably connected in the mounting hole of lock hook 611.The front end of lock hook is hook portion, and the rear end of lock hook is in " T " font structure, the one end of pull bar stage clip 612 are supported on supply pull bar 615 and are located at the inner of mounting hole, pull bar stage clip 612 it is another One end is then supported on the T-shaped portion position of lock hook 611, and pull bar stage clip 612 is cylindrical compression spring, and it will supply pull bar all the time 615 press to the right end position of mounting hole.Equipped with supply between the rear end of lock hook 611 and the supply leftward position of valve body 601 Extension spring 604, the supply extension spring 604 form the trend of pull-off supply sealing gasket 620 by supplying pull bar 615 to airway tube 618.

Supply valve body 601 on by lever support 616 it is hinged have supply lever 613, this structure be easy to assembling and Safeguard, and larger lever ratio can be obtained, beneficial to reduction respiratory resistance.Supply relative with hinge support another on lever 613 End is connected on supply lever seat 610, and supply lever seat 610 is installed on diaphragm 605 by diaphragm liner plate.Supply lever 613 Close contact is affixed in bar segment position corresponding with supply pull bar 615 outer end and the bending end of supply pull bar 615.Upon exhalation, film Piece 5 is outwards heaved and driven to be lifted on supply lever 613, in supply lever 613 in coercive mechanism swing process, supplies lever 613 The bending end of supply pull bar 615 is promoted, then promotes the pipe end of airway tube 618 to be affixed to supply sealing gasket 620 and realizes sealing；Work as suction During gas, diaphragm 605 is agitated downwards and drives the supply bottom of pull bar 613, now in the presence of extension spring 604 is supplied, supply extension spring Airway tube 618 is pulled away from supply sealing gasket 620 by 604 by lock hook 611, supply pull bar 615 so that in the mouth of pipe of airway tube 618 Airspace is produced between supply sealing gasket 620, comes from the fresh air of heating pipe joint 628 through airway tube slide 617 On ring-type air flue enter airway tube 618, and supplied into mask.

As shown in figure 3, being installed with lockplate 630 on supply valve body 601, the lockplate 630 is located at diaphragm 605 Lower section, and lock hook 611 is located at the lower section of lockplate 630.A lock hole 629, lock hole are provided with lockplate 630 629 position is corresponding with the hook portion of lock hook 611 so that the hook portion of lock hook 611 can hook the lock hole 629 In.The latch hook push rod 603 that can be axially moveable is additionally provided with supply valve body 601, in latch hook push rod 603 and steam supply valve sheet Latch hook push rod back-moving spring 602 is provided between body 601.The front end of latch hook push rod 603 is provided with shoulders, after latch hook push rod 603 End is outer to extend the outside of steam supply valve body 601.When inwardly being promoted from the rear end of latch hook push rod 603 and compress latch hook push rod back-moving spring When 602, the shoulders of latch hook push rod 603 promotes the T-shape subordinate end of lock hook 611, and lock hook 611 deflects and makes locking The hook portion of hook 611 is hooked into the lock hole 629 of lockplate 630.Due to hooking the axial location of lock hook 611 in lock hole 629 Locked, the mouth of pipe of airway tube 618 is close on supply sealing gasket 620, and airway tube 618 can not be pulled away from confession by supply extension spring 604 Airway tube 618 can not be pressed further onto supplying sealing gasket 620 by airtight packing 620, supply lever 613, now aerial respiration Device steam supply valve can be only in off working state.And when beginning to use respirator steam supply valve, first during air-breathing, diaphragm 605 is under The hook end of lock hook 611 is touched in bulging process, and the hook end pressure of lock hook is broken off relations from lock hole 629, lock hook 611, is supplied Air valve starts continuous normal work.When stopping using, latch hook push rod 603 is promoted the hook portion of lock hook is hooked locking again In hole 629.

The back board module 2 of positive-pressure air respirator as shown in Figure 4, the back board module 2 include backboard body 201, should Backboard body 201 is formed by injection molding.Front in Fig. 4 is the gas cylinder mounting surface of back board module, and its reverse side is then and human body Face is born in contact.The top of backboard body 201 corresponds to shoulder position in the arc being bent outwardly, the bottom of backboard body 201 Then correspond to waist location and the camber that curves inwardly, make backboard body 201 longitudinal direction break it is S-shaped；And backboard body 201 is upper Narrow lower wide structure, so as to meet ergonomic designs' theory, wearing is born more comfortable.

Backboard body 201 uses symmetrical structure, and backboard convex tendon 211, backboard are provided with the symmetrical line position of backboard body 201 Edge convex tendon is also equipped with the edge of body 201.The back position of backboard convex tendon 211 is provided with gas cylinder upper bracket 209, The waist location of backboard convex tendon 211 is provided with gas cylinder undersetting 214.As shown in figure 5, the top surface of gas cylinder undersetting 214 is circular arc Face, the top surface of same gas cylinder upper bracket 209 is also arc surface, and the external cylindrical surface of the circular arc radius surface with gas cylinder body matches, So as to gas cylinder body good contact.Set respectively in the both sides of backboard convex tendon 211 of the shoulder of backboard body 201 and waist connecting position Bottle hand hole 212 is carried, it is through hole to carry bottle hand hole 212, and the periphery of the through hole also is provided with hand hole flange, both enhances backboard body 201 strength and stiffness, also enhance the comfort level of hand hole gripping.

As shown in fig. 6, the lower end tip position suit in backboard body 201 is installed with barge bumpar 216, the anticollision Protection pad 216 is made up using flexible rubber of material.The top of the barge bumpar 216 is provided with bottle valve bearing 215, should The bottle valve bearing 215 being arranged in backboard body 201 is used to compressed air bottle bottle valve be fixedly mounted, and causes bottle valve Minimum point still in barge bumpar 216 bottom above, so as to protect bottle valve not to be knocked damage.

System, which is detained, in the both sides of the waist location of backboard body 201 is connected with waistband 203.The both ends of waistband 203 respectively to The both sides extension of backboard body 201, the buckle 213 that can be mutually inserted is respectively arranged with the band edge of waistband 203.It is right in waistband 203 The waist location of backboard body 201 answered bears face and is provided with waist cushion 204, and the waist cushion 204 runs through from the waistband of side To the waistband of opposite side, the both ends of waist cushion 204 are connected and installed in by the bustle cingulum 202 on waist cushion 204 On waistband 203.

In the upper end of backboard body 201, button system is connected with shoulder belt 208, and the other end of shoulder belt 208, which then sews, to be connected to therewith On the extension of corresponding half waistband 203.The shoulder belt 208 has two, and two shoulder belts 208 are located at the both sides of backboard body 201 respectively； Shoulder cushion 207 is equipped with two shoulder belts 208.Waist cushion 204 and shoulder cushion 207 are with fire retardant and flame-retardant polypropylene Form.

System, which is detained, in the both sides of the shoulder position of backboard body 201 is connected with gas cylinder fixing band 205, gas cylinder fixing band 205 Two band edges respectively to backboard body 201 both sides extend, one end of gas cylinder fixing band 205 is connected with the connection ring of metal 210, the other end of gas cylinder fixing band 205 is connected with seta hasp 206, to facilitate the system that buckles to gas cylinder to fix.Gas cylinder upper bracket 209 on the connecting line of both sides gas cylinder fixing band 205 so that the position of gas cylinder upper bracket 209 and the position of gas cylinder fixing band 205 Put corresponding.

It is above-mentioned that non-limiting technical description, those skilled in the art are only made to the technical solution of the utility model with embodiment Improvement and equivalent substitution of the member to it are still fallen within the scope of protection of the utility model.

Claims (10)

1. a kind of positive-pressure air respirator, including back board module（2）And it is fixed on back board module（2）On gas cylinder assembly （1）, the gas cylinder assembly（1）Through depressurizing valve assembly（3）With mask air supply hose（5）Lead to respirator steam supply valve（6）, the respirator Steam supply valve（6）It is installed on mask（7）On, it is characterised in that：The respirator steam supply valve（6）Including supplying valve body（601）, with And pass through steam supply valve top cover（607）It is fixedly installed in supply valve body（601）On diaphragm（605）, in the supply valve body （601）On be installed with airway tube slide（617）, in airway tube slide（617）On be slidably fitted with airway tube（618）, should Airway tube（618）Outer end be provided with supply sealing gasket（620）, supply sealing gasket（620）Pass through gasket base（621）It is installed on Airway tube slide（617）On；Airway tube slide（617）On be sealed and installed with heating pipe joint（628）, heating pipe joint（628） On air supply channel by supply sealing gasket（620）Lead to airway tube（618）；Airway tube（618）The inner with supply pull bar （615）Outer end be connected, the supply pull bar（615）The inner be movably connected on lock hook（611）On, in lock hook（611） With supplying valve body（601）Between supply extension spring is installed（604）；In supply valve body（601）On be installed with lockplate （630）, in the lockplate（630）It is provided with lock hole（629）, the lock hook（611）Hook portion and lock hole（629）Position It is corresponding；In supply valve body（601）It is above hinged to have supply lever（613）, the supply lever relative with hinge support（613）It is another End is connected to diaphragm（605）On；Supply lever（613）With supplying pull bar（615）Outer end in contact be connected；In supply valve body （601）On be also movably set with latch hook push rod（603）, latch hook push rod（603）Front end and lock hook（611）It is corresponding, locking Hook push rod（603）With supplying valve body（601）Between be provided with latch hook push rod back-moving spring（602）；In the airway tube slide （617）On be supported with bypass valve rod（624）, the bypass valve rod（624）Inner and gasket base（621）It is connected, bypasses valve rod （624）Outer end with bypass valve hand wheel（623）It is connected, the bypass valve hand wheel（623）It is rotatably connected in airway tube slide（617）On.

2. positive-pressure air respirator according to claim 1, it is characterised in that：The decompression valve assembly（3）It is installed on Gas cylinder assembly（1）Position of bottleneck, decompression valve assembly（3）Valve body on be provided with pressure-air interface and low-pressure air connects Mouthful, the pressure-air interface and residual gas displaying alarm（9）It is connected；Mask supply is parallel with the low-pressure air interface Flexible pipe（5）Air supply pipe is rescued with him（4）.

3. positive-pressure air respirator according to claim 1, it is characterised in that：The mask（7）On numeral is installed Display instrument（8）.

4. according to the positive-pressure air respirator described in claim 1,2 or 3, it is characterised in that：The lock hook（611）On set Mounting hole is equipped with, supplies pull bar（615）The inner be connected in lock hook（611）Mounting hole in, pull bar stage clip（612）It is supported on Supply pull bar（615）It is inner；The supply lever（613）Pass through lever support（616）It is hinged in supply valve body（601）On； The diaphragm（605）On supply lever seat is installed（610）, supply lever（613）It is connected to supply lever seat（610）On.

5. positive-pressure air respirator according to claim 4, it is characterised in that：The airway tube slide（617）On set Ring-type air supply channel is equipped with, sealing ring, the heating pipe joint are respectively arranged with the both sides of the ring-type air supply channel（628）By this Sealing ring is hermetically installed on airway tube slide（617）On, heating pipe joint（628）Air supply channel and airway tube slide （617）On air supply channel be connected.

6. positive-pressure air respirator according to claim 4, it is characterised in that：The bypass valve rod（624）Pass through valve Bar seals（627）Hermetically it is supported on airway tube slide（617）On, in bypass valve rod（624）It is upper that bypass stage clip is housed（622）； The bypass valve rod（624）With bypassing valve hand wheel（623）Between positioning ratchet wheel detent mechanism is housed.

7. according to the positive-pressure air respirator described in claim 1,2 or 3, it is characterised in that：The back board module（2）Including Backboard body（201）, in backboard body（201）Symmetrical line position be provided with backboard convex tendon（211）, in backboard convex tendon（211）On It is respectively arranged with gas cylinder upper bracket（219）With gas cylinder undersetting（214）；In backboard body（201）On be provided with and carry a bottle hand hole （212）, backboard body（201）Lower end be installed with barge bumpar（216）；In backboard body（201）On be also associated with waist Band（203）With gas cylinder fixing band（205）, the waistband（203）Pass through bustle cingulum（202）It is connected with waist cushion（204）, in shoulder Band（208）On be connected with shoulder cushion（207）；Shoulder belt（208）One end be connected to backboard body（201）Upper end, shoulder belt（208） The other end be connected to waistband（203）On.

8. positive-pressure air respirator according to claim 7, it is characterised in that：The backboard body（201）Upper setting There is bottle valve bearing（215）, the bottle valve bearing（215）Positioned at barge bumpar（216）Top.

9. positive-pressure air respirator according to claim 7, it is characterised in that：The shoulder belt（208）There are two, this two Root shoulder belt（208）It is located at backboard body respectively（201）Both sides；The waistband（203）Band edge respectively to backboard body（201） Both sides extension, in waistband（203）Band edge buckle is housed（213）；The waist cushion（204）From backboard body（201）One The waistband of side（203）Position is penetrated to backboard body（201）Another half waistband（203）.

10. positive-pressure air respirator according to claim 7, it is characterised in that：The gas cylinder fixing band（205）Two Band edge is respectively to backboard body（201）Both sides extension, the gas cylinder fixing band（205）One end be connection ring（210）, gas cylinder is solid Determine band（205）The other end be connected with seta hasp（206）；The gas cylinder upper bracket（209）Position and gas cylinder fixing band （205）Position is corresponding.