CN108744333B - Air respirator - Google Patents

Abstract

The invention discloses an air respirator, which comprises a back tool and an air bottle arranged on the back tool, wherein a pressure reducer communicated with a valve of the air bottle is arranged on the back tool, a pair of output end interfaces are arranged on the pressure reducer, rotary valves are arranged in the middles of the pair of output end interfaces, a medium-pressure pipe is arranged on each pair of output end interfaces, an air supply joint is arranged at the end part of each medium-pressure pipe, a full face mask is arranged on each air supply joint, and a locking piece used for fixing one full face mask on the back tool is arranged on the back tool. The invention has the following advantages and effects: through set up another full face guard on the pressure reducer and supply to be rescued personnel and use to be fixed in the harness with the full face guard through the locking piece, when making the rescue of speedily carrying out rescue work, the fireman need not additionally to carry one set of air respirator, by a wide margin reduced fireman's heavy burden, also accelerated fireman's walking speed simultaneously, accelerated fireman's rescue speed.

Description

Air respirator

Technical Field

The invention relates to the field of firefighting rescue articles, in particular to an air respirator.

Background

The air respirator is a self-sufficient open type air respirator, which is widely applied to departments such as fire fighting, chemical engineering, ships, petroleum, smelting, warehouses, laboratories, mines and the like, and is used for fire extinguishment, rescue and relief work and rescue work of firemen or rescue personnel safely and effectively under various environments such as dense smoke, toxic gas, steam or oxygen deficiency.

Chinese patent No. CN104127963B discloses an air respirator integrated with head-up display and communication functions, which comprises a back tool, wherein a gas cylinder tightening belt is arranged at the middle upper part of the back tool, and a back tool component is arranged at the lower part of the back tool; a transmitting end box body of a head-up display device is arranged at the middle position of the back assembly at the lower part of the back assembly, the transmitting end box body comprises a left box body and a right box body, a pressure reducer is connected onto the back assembly, a medium-pressure pipe at the end of the pressure reducer is connected onto the pressure reducer, a duplex female quick plug is connected with the other end of an output line above the right box body at the end of the pressure reducer, the duplex female quick plug is in butt joint with a duplex male quick plug, the duplex male quick plug is connected with a gas supply valve, a receiving display end of the head-up display device is arranged on the gas supply valve; a communication sound amplifying device is arranged on the overall cover; the left box body is connected with a display device through a cable.

When the air respirator is used, compressed air in the air bottle passes through the pressure reducer, is conveyed into the air supply valve along the medium pressure pipe at the end of the pressure reducer, and is conveyed into the full face mask through the air supply valve to be breathed by rescuers. However, when entering dense smoke or oxygen-poor environment to help the firefighter, the firefighter is required to carry a set of air respirator additionally for the rescued firefighter to breathe, so that the load of the firefighter is increased, and improvement is needed.

Disclosure of Invention

The invention aims to provide an air respirator which has the effect of reducing the load of firemen.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides an air respirator, including the back of the body utensil, set up in gas cylinder on the back of the body utensil, be provided with on the back of the body utensil communicate in the pressure reducer of gas cylinder valve, be provided with a pair of output end interface on the pressure reducer, it is a pair of the middle part of output end interface all is provided with rotary valve, and is a pair of all be provided with well pressure pipe on the output end interface, it is a pair of the tip of well pressure pipe all is provided with the air feed joint, and is a pair of all be provided with the full face guard on the air feed joint, be provided with on the back of the body utensil and be used for.

Through adopting above-mentioned technical scheme, when the above-mentioned air respirator rescue was worn to needs the fire fighter, check gas cylinder and all pipelines earlier, ensure the errorless back, wear harness and gas cylinder in the fire fighter back. Then one of the full facemasks is fixed on the back tool by the locking piece, the other full facemask is worn on the face, the cylinder valve of the gas cylinder is opened at the moment, the rotary valve which is used for controlling the full facemask worn by a fireman to open and close is opened, air in the gas cylinder enters the pressure reducer, high-pressure air flowing out of the gas cylinder is reduced to 0.6-0.9MPa by the pressure reducer, and finally decompressed medium-pressure gas flows into the full facemask along the output end port, the medium-pressure pipe and the gas supply connector in sequence for the fireman to breathe. When the firefighter searches for the rescued person, the firefighter releases the locking piece, then takes the other full face mask off the harness, rotates the other rotary valve to enable the air in the pressure reducer to flow into the full face mask, and then fixes the full face mask on the head and the face of the rescued person. And then when making rescue and rescue, the fire fighter need not additionally to carry one set of air respirator, has reduced fire fighter's heavy burden by a wide margin, has also accelerated fire fighter's walking speed simultaneously, has accelerated fire fighter's rescue speed.

The invention is further provided with: the locking piece including set up in first locking piece on the full face guard, set up in second locking piece on the back of the body utensil, be provided with the confession on the second locking piece the locking groove that first locking piece was pegged graft, the two relative inner walls of locking groove all are provided with the locking hole, first locking piece both sides are run through the sliding hole that has mutual intercommunication, sliding connection has a pair ofly to be used for pegging graft in the sliding hole the slide bar in locking hole, be provided with the spring that is located between a pair of slide bar in the sliding hole, the both ends of spring all are fixed in a pair ofly the terminal surface of slide bar, be provided with on the first locking piece communicate in the sliding groove of sliding hole, it is a pair of all be provided with on the slide bar and wear to establish be located behind the sliding groove the outside driving lever of first locking piece.

Through adopting above-mentioned technical scheme, when needs are fixed in the harness with the full face guard, press two driving levers and be close to each other, two driving levers drive a pair of slide bars and slide and be close to each other along the sliding hole, and two slide bars press the spring compression jointly this moment. After embedding the slide bar into the slide hole completely until two slide bars, promote the locking groove on the first locking piece grafting second locking piece, conflict when the terminal surface of first locking piece locks the groove diapire, two slide bars are just aligned each other with the locking hole that locks the inslot wall, then loosen two driving levers, the resilience force of spring self promotes two slide bars and keeps away from each other and insert the locking hole, and then accomplishes the locking between first locking piece and the second locking piece, accomplishes fixing between full face guard and the back of the body utensil promptly. When needs take off the full face guard from the braces, press two driving levers and be close to each other, two driving levers drive two slide bars and are close to each other, break away from locking hole of locking inslot wall completely until two slide bars after, stimulate first locking piece along the locking groove outside motion on the second locking piece, break away from locking groove back completely, accomplish taking off of full face guard promptly, can wear the full face guard in the personnel's head of being saved this moment.

The invention is further provided with: the end face of one of the sliding rods is provided with a guide post for the spring to be sleeved with, and the end face of the other sliding rod is provided with a guide hole for the guide post to be inserted.

Through adopting above-mentioned technical scheme, supply the spring housing to establish through setting up the guide post, utilize the motion approach of guide post restriction spring, upwards beat or buckle when avoiding the spring atress uneven, and then improved the holistic stability of above-mentioned locking piece.

The invention is further provided with: the locking piece including set up in first gag lever post on the full face guard, set up in second gag lever post on the back of the body utensil, the inside of second gag lever post is provided with the cavity, the terminal surface of second gag lever post be provided with communicate in the spacing groove of cavity, the terminal surface of first gag lever post is provided with a plurality of being used for pegging graft the flexure strip of spacing groove, the flexure strip deviates from the one end of first gag lever post is and keeps away from the setting each other, one side outer wall that the flexure strip deviates from each other all is provided with wears to establish hook tightly behind the spacing groove the pothook of cavity inner wall, the outer wall sliding connection of first gag lever post has and is used for driving a plurality ofly the flexure strip is the sliding sleeve that is close to the direction motion each other.

Through adopting above-mentioned technical scheme, when needs are fixed in the back of the body utensil with the full face guard, promote the sliding sleeve and slide along first gag lever post outer wall, when the sliding sleeve slided to the flexure strip position, the sliding sleeve pressed the flexure strip and was close to each other and tighten up. When the elastic sheet and the limiting grooves on the clamping hook and the second limiting rod are aligned with each other, the first limiting rod is pushed to drive the elastic sheet and the clamping hook to be inserted into the limiting grooves and embedded into the cavity in the second limiting rod, the sliding sleeve is pulled to move reversely, the elastic sheet is bounced open and kept away from each other, the elastic sheet drives the clamping hook to hook the inner wall of the cavity, locking between the first limiting rod and the second limiting rod is completed, and locking of the whole mask and the back tool before is completed. When needs take off the full face guard from the braces, promote the sliding sleeve and move towards the flexure strip direction along first gag lever post, the flexure strip is pressed gradually and is moved each other and be close to this moment, drives behind the pothook breaks away from the cavity inner wall as the flexure strip, stimulates first gag lever post and drives flexure strip and pothook along the outside motion of spacing groove, until break away from the spacing groove completely after, accomplishes taking off of full face guard promptly, can wear the full face guard in the personnel head of being saved this moment.

The invention is further provided with: first gag lever post deviates from the one end outer wall of flexure strip sets up the locating plate, the sliding sleeve is close to the one end of locating plate is provided with the elastic limiting block, the locating plate lateral wall is provided with the confession the recess of elastic limiting block embedding, the locating plate lateral wall be provided with communicate in the recess just supplies the circular arc type ring channel of the embedding is slided to the elastic limiting block.

Through adopting above-mentioned technical scheme, when being fixed in the full face guard the back of the body utensil, promote the sliding sleeve with the elastic limiting block on the sliding sleeve imbed the recess on the locating plate after, rotate the sliding sleeve and make elastic limiting block imbed in the ring channel to utilize frictional force between the two to fix the sliding sleeve, when avoiding the fire fighter to touch the sliding sleeve carelessly, the sliding sleeve is pressed and is moved the flexure strip shrink and lead to the full face guard to break away from the back of the body utensil, and then has increased the holistic stability of above-mentioned locking piece and security.

The invention is further provided with: the medium voltage pipe includes a plurality of hollow bodys, and is a plurality of the both ends inner wall of body all is provided with the inner edge, adjacent two sliding connection has cavity and has elastic connecting pipe between the body, the outer wall of connecting pipe contradict in the inner wall of inner edge, the both ends outer wall of connecting pipe all is provided with and is used for conflicting the outer fringe of inner edge terminal surface.

Through adopting above-mentioned technical scheme, when needs lengthen whole middling pressure pipe, the pulling air feed connects and drives a plurality of bodys and keep away from each other, and two adjacent bodys slide along the connecting pipe outer wall between the two this moment, and then accomplish the length adjustment of middling pressure pipe. When need not using the intermediate pressure pipe, promote a plurality of bodys and be close to each other, contradict each other until a plurality of bodys, accomplish accomodating of whole intermediate pressure pipe promptly. And then make the length of above-mentioned medium voltage pipe can freely adjust for can be more convenient when the fireman rescues and rescues.

The invention is further provided with: the pipe body at two ends of the medium-pressure pipe is internally provided with a crossbeam, and an elastic rope is arranged between the pair of crossbeams.

By adopting the technical scheme, when the middle pressure pipe is stretched, the pipe bodies at the two ends pull the elastic rope to stretch; when not needing to use the medium-pressure pipe, loosen the body at both ends, the elasticity rope tightens up and drives a plurality of bodys and be close to each other this moment, accomplishes accomodating of whole medium-pressure pipe promptly to accomodate the back, take-up through the elasticity rope, reduce the medium-pressure pipe and manage the interference to the fireman, convenience when further improving the fireman rescue.

The invention is further provided with: one of them is provided with the crossbeam the body inner wall articulates there is the closing plate, the closing plate is located the mouth of pipe of body with between the crossbeam, the inner wall of body is provided with and is used for conflicting the spacing collar of closing plate terminal surface just the spacing collar is located the closing plate with between the crossbeam, be provided with a plurality of chambeies of accomodating on the spacing collar, it is provided with the elasticity rubber band to accomodate the intracavity, elasticity rubber band one end is fixed in accomodate chamber diapire and the lower terminal surface that the other end was fixed in the closing plate.

Through adopting above-mentioned technical scheme, when using above-mentioned middling pressure pipe, will have the one end of closing plate to connect in the full face guard, when having gas flow in the body, gas self impact force promotes the closing plate along articulated upset of department to closing plate pulling elasticity rubber band extension, gas can flow along the gap between closing plate and the body inner wall this moment. When gas no longer flows, the air is no longer to exert the impact force to the closing plate, and the reverse upset of elasticity rubber band pulling closing plate this moment, contradicts when the closing plate in the spacing collar, and the elasticity rubber band also gets into to accomodate the chamber and accomodates, and sealed with body and whole middling pressure pipe through the closing plate this moment, has reduced the entering of dust, and then causes the damage to the respiratory track by the rescuer when avoiding the dust to get into middling pressure pipe.

The invention is further provided with: the full face guard includes full transparent face guard main part and the oral nasal mask who laminates mutually with the mouth nose, be provided with in the face guard main part with the air feed valve that air feed joint is linked together, the air feed valve is located the face guard main part with position department between the oral nasal mask is provided with the air jet, be provided with a pair of one-way inspiratory valve on the oral nasal mask, the face guard main part and intercommunication each other has discharge valve between the oral nasal mask.

Through adopting above-mentioned technical scheme, wear the full face guard in the fireman or by the rescuee head after, the oronasal mask laminates in the face this moment, and when the gas inflow in the air feed joint supplied air valve, clean and cool gas spouts the face guard main part through the jet orifice on the air supply valve, has reached defogging and effect of keeping the clear. Then the gas is supplied for the wearer to breathe in the oral-nasal mask through a pair of single-line inhalation valves, and the lower visual field of the wearer is wider by setting the mask main body to be completely transparent.

The invention is further provided with: be provided with the intercom on the back of the body utensil, the face guard main part and intercommunication each other has the transaudient pipe between the oronasal mask, be provided with the transaudient ware on the transaudient pipe, be provided with the headset on the transaudient ware and be used for pegging graft the connector of intercom.

Through adopting above-mentioned technical scheme, wear behind the firefighter or the personnel head of being saved when the full face guard, when wearing personnel and communicate, sound is along the pipe and the transmission of sound ware to the intercom to receive sound information through the headset, and then make the communication between the person of wearing more convenient.

In conclusion, the invention has the following beneficial effects:

1. the other full face mask is arranged on the pressure reducer and used by the rescued people, and the full face mask is fixed on the back tool through the locking piece, so that a fireman does not need to additionally carry a set of air respirator during emergency rescue, the load of the fireman is greatly reduced, the walking speed of the fireman is increased, and the rescue speed of the fireman is increased; the whole mask is more convenient and quicker to take and place by arranging the locking piece which is convenient to disassemble and assemble;

2. by arranging the intermediate pressure pipe with adjustable length specification, a fireman can more conveniently use the intermediate pressure pipe for emergency rescue; the intermediate pressure pipe is accommodated and tensioned by the elastic rope, so that the interference of the intermediate pressure pipe on a fireman is reduced, and the convenience of the fireman in emergency rescue is further improved;

3. the middle pressure pipe is sealed by the sealing plate which is automatically opened and closed, so that the dust is prevented from entering, and the respiratory tract of the rescued person is prevented from being damaged when the dust enters the middle pressure pipe;

4. the lower visual field of a wearer is wider by arranging the mask main body to be completely transparent; the clean and cool gas can be sprayed on the mask body through the air nozzle, so that the defogging and eyesight-protecting effects are achieved; through setting up phonograph and intercom to receive sound information through the headset, make the communication between the person of wearing more convenient.

Drawings

FIG. 1 is a schematic structural view of example 1;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view showing the connection of the locking member of embodiment 1;

FIG. 4 is a schematic structural view of the locking member of embodiment 1;

FIG. 5 is a schematic view showing the structure of the full face mask of example 1;

FIG. 6 is a schematic view showing the connection of the full face mask of example 1;

FIG. 7 is a schematic view of the structure of a medium pressure pipe according to example 1;

fig. 8 is a schematic view of the internal structure of the pipe body of embodiment 1;

FIG. 9 is a schematic view showing the connection of the locking member of embodiment 2;

FIG. 10 is a schematic structural view of the locking member of embodiment 2;

fig. 11 is a schematic view of the structure of the groove and the annular groove in embodiment 2.

In the figure: 1. a back tool; 11. a gas cylinder; 12. an interphone; 2. a pressure reducer; 21. an output port interface; 22. rotating the valve; 3. a medium pressure pipe; 31. a gas supply joint; 32. a pipe body; 321. a cross beam; 322. an elastic cord; 33. an inner edge; 34. a connecting pipe; 35. an outer edge; 36. a sealing plate; 37. a limiting ring; 38. a receiving cavity; 39. an elastic rubber band; 4. a full face mask; 41. a mask body; 42. an oronasal mask; 43. an air supply valve; 431. an air jet; 44. a one-way suction valve; 45. an exhaust valve; 46. a sound transmission tube; 47. a microphone; 48. a headset; 49. a connector; 5. a locking member; 51. a first locking block; 511. a slide hole; 512. a slide bar; 513. a spring; 514. a guide post; 515. a guide hole; 516. a sliding groove; 517. a deflector rod; 52. a second locking block; 521. a locking groove; 522. a locking hole; 53. a first limit rod; 531. an elastic sheet; 532. a hook; 54. a second limiting rod; 541. a cavity; 542. a limiting groove; 6. a sliding sleeve; 61. an elastic limiting block; 7. positioning a plate; 71. a groove; 72. an annular groove.

Detailed Description

Example 1: an air respirator, as shown in fig. 1 and fig. 2, comprises a back tool 1, an air bottle 11 arranged on the back tool 1, a pressure reducer 2 communicated with a bottle valve of the air bottle 11 is arranged on the back tool 1, a pair of output end interfaces 21 are arranged on the pressure reducer 2, rotary valves 22 are arranged in the middle of the pair of output end interfaces 21, medium-pressure pipes 3 are arranged on the pair of output end interfaces 21, air supply connectors 31 are arranged at the end parts of the medium-pressure pipes 3, full masks 4 are arranged on the pair of air supply connectors 31, and a locking part 5 used for fixing one of the full masks 4 on the back tool 1 is arranged on the back tool 1.

When a fireman needs to wear the air respirator for emergency rescue, the air bottle 11 and all pipelines are checked first, and after the whole air respirator is ensured not to have air leakage or faults, the harness 1 and the air bottle 11 are worn on the back of the fireman. Then, one full facepiece 4 is fixed on the back tool 1 by the locking piece 5, after the other full facepiece 4 is worn on the face, after a cylinder valve of the air cylinder 11 and a rotary valve 22 for controlling the full facepiece 4 worn by a fire fighter to be opened and closed are opened, air in the air cylinder 11 enters the pressure reducer 2, and high-pressure air flowing out of the air cylinder 11 is reduced to 0.6-0.9MPa by the pressure reducer 2 by utilizing a force balance principle, namely, the medium-pressure air after being reduced by the pressure reducer 2 can be always kept in a constant pressure range. Finally, the decompressed medium-pressure gas flows into the full face mask 4 along the output port 21, the medium-pressure pipe 3 and the gas supply joint 31 in sequence for the firefighters to breathe.

When the fire fighter enters into a bad place to rescue and search the rescued person, the fire fighter releases the locking piece 5, then removes the other full face mask 4 from the harness 1, rotates the other rotary valve 22 to make the air in the pressure reducer 2 flow into the full face mask 4, fixes the full face mask 4 on the head and face of the rescued person, at the moment, the rescued person can also breathe the air in the air bottle 11, finally removes the rescued person from the danger area through the fire fighter, removes the full face mask 4 from the head of the rescued person, then closes the rotary valve 22 for controlling the rescued person, and then fixes the full face mask 4 on the harness 1 by using the locking piece 5. And then when making rescue and rescue, the fire fighter need not additionally to carry one set of air respirator, greatly reduced fire fighter's heavy burden, also accelerated fire fighter's walking speed simultaneously, accelerated fire fighter's rescue speed.

As shown in fig. 3 and 4, the locking member 5 includes a first locking block 51 disposed on the full-face mask 4, and a second locking block 52 disposed on the back tool 1, a locking groove 521 for the first locking block 51 to be inserted is disposed on the second locking block 52, two opposite inner walls of the locking groove 521 are both provided with locking holes 522, sliding holes 511 are disposed through two sides of the first locking block 51 and communicated with each other, a pair of sliding rods 512 for inserting the locking holes 522 are slidably connected in the sliding holes 511, a spring 513 is disposed in the sliding hole 511 and located between the pair of sliding rods 512, two ends of the spring 513 are both fixed to end faces of the pair of sliding rods 512, a guide post 514 for the spring 513 to be sleeved is disposed on an end face of one of the sliding rods 512, a guide hole 515 for the guide post 514 to be inserted is disposed on an end face of the other sliding rod 512, a sliding groove 516 communicated with the sliding hole 511 is disposed on the first locking block 51, and a deflector rod 517 is disposed on the pair of sliding rods 512 and located outside the first locking.

When the whole mask 4 needs to be fixed on the back set 1, the two deflector rods 517 are pressed to approach each other, the two deflector rods 517 drive the pair of sliding rods 512 to slide along the sliding holes 511 and approach each other, at this time, the two sliding rods 512 press the spring 513 together to compress, and meanwhile, the guide post 514 on one sliding rod 512 is inserted into the sliding hole 511 on the other sliding rod 512. After two slide bars 512 are completely embedded into the sliding hole 511, push the locking groove 521 on the first locking block 51 inserted into the second locking block 52, until the end surface of the first locking block 51 butts against the bottom wall of the locking groove 521, the two slide bars 512 are aligned with the locking hole 522 on the inner wall of the locking groove 521, at this moment, release two deflector rods 517, the resilience force of the spring 513 itself pushes the two slide bars 512 to be away from each other and inserted into the locking hole 522, and then the locking between the first locking block 51 and the second locking block 52 is completed, namely the fixation between the full face mask 4 and the back of the body tool 1 is completed.

When the full face mask 4 needs to be taken down from the back tool 1, the two deflector rods 517 are pressed to be close to each other, the two deflector rods 517 drive the two sliding rods 512 to be close to each other, and after the two sliding rods 512 are completely separated from the locking holes 522 on the inner walls of the locking grooves 521, the first locking block 51 is pulled to move outwards along the locking groove 521 on the second locking block 52 until the two sliding rods 512 are completely separated from the locking grooves 521, the full face mask 4 is taken down, and at the moment, the full face mask 4 can be worn on the head of a rescued person.

As shown in fig. 5 and 6, the full face mask 4 includes a full transparent mask body 41 and an oronasal mask 42 attached to the oronasal mask, an air supply valve 43 connected to the air supply is provided on the mask body 41, an air jet 431 is provided at a position of the air supply valve 43 between the mask body 41 and the oronasal mask 42, a pair of one-way inhalation valves 44 is provided on the oronasal mask 42, an exhaust valve 45 is communicated between the mask body 41 and the oronasal mask 42, an intercom 12 (see fig. 1) is provided on the back set 1, a sound transmission pipe 46 is communicated between the mask body 41 and the oronasal mask 42, a sound transmitter 47 is provided on the sound transmission pipe 46, and an earphone 48 and a connector 49 for inserting the intercom 12 are provided on the sound transmitter 47.

When the full face mask 4 is worn on the head of a firefighter or a person to be rescued, the oronasal mask 42 is attached to the face, and when the air in the air supply connector 49 flows into the air supply valve 43, clean and cool air is sprayed on the mask body 41 through the air outlets 431 in the air supply valve 43, so that the defogging and eyesight protecting effects are achieved. The gas then passes through a pair of single line inhalation valves and into the oronasal mask 42 for the wearer to breathe, and the lower field of view of the wearer is made broader by setting the mask body 41 to be fully transparent.

When the full face mask 4 is worn on the head of a fire fighter or a person to be rescued and the wearing person communicates, the sound is transmitted to the interphone 12 along the sound transmission tube 46 and the sound transmitter 47, and the sound information is received through the headset 48, so that the communication between the wearers is more convenient.

As shown in fig. 7, the middle pressure pipe 3 includes a plurality of hollow pipe bodies 32, inner edges 33 are disposed on inner walls of two ends of each of the plurality of pipe bodies 32, a hollow elastic connecting pipe 34 is slidably connected between two adjacent pipe bodies 32, an outer wall of the connecting pipe 34 abuts against an inner wall of the inner edge 33, and outer edges 35 for abutting against end faces of the inner edge 33 are disposed on outer walls of two ends of the connecting pipe 34. The pipe body 32 at two ends of the medium-pressure pipe 3 is internally provided with a cross beam 321, and an elastic rope 322 is arranged between a pair of the cross beams 321.

When the whole middle pressure pipe 3 needs to be elongated, the pulling air supply connector 31 drives the plurality of pipe bodies 32 to be away from each other, at the moment, the two adjacent pipe bodies 32 slide along the outer wall of the connecting pipe 34 between the two pipe bodies, and meanwhile, the pipe bodies 32 at the two ends pull the elastic rope 322 to be elongated. When need not using the medium pressure pipe 3, loosen the air feed joint 31, elasticity rope 322 tightens up and drives a plurality of bodys 32 and be close to each other this moment, contradict each other until a plurality of bodys 32, accomplish accomodating of whole medium pressure pipe 3 promptly, and then make the length of medium pressure pipe 3 freely adjustable, and strain through elasticity rope 322, make the use of medium pressure pipe 3 and accomodate more convenient, and can reduce the medium pressure pipe 3 to the interference of fireman, it can be more convenient when making the fireman rush to rescue.

As shown in fig. 8, a sealing plate 36 is hinged to an inner wall of one of the tube bodies 32 provided with the cross beam 321, the sealing plate 36 is located between the opening of the tube body 32 and the cross beam 321, a limiting ring 37 for abutting against an end surface of the sealing plate 36 is arranged on the inner wall of the tube body 32, the limiting ring 37 is located between the sealing plate 36 and the cross beam 321, a plurality of accommodating cavities 38 are arranged on the limiting ring 37, elastic rubber bands 39 are arranged in the accommodating cavities 38, one end of each elastic rubber band 39 is fixed to the bottom wall of the corresponding accommodating cavity 38, and the other end of.

When the above-mentioned medium-pressure pipe 3 (see fig. 1) is used, the end with the sealing plate 36 is connected to the full facepiece 4 (see fig. 1), when gas flows in the pipe body 32, the impact force of the gas itself pushes the sealing plate 36 to turn over along the hinge, and the sealing plate 36 pulls the elastic rubber band 39 to stretch, at which time the gas can flow out along the gap between the sealing plate 36 and the inner wall of the pipe body 32. When gas no longer flows, the air no longer exerts the impact force to closing plate 36, and elasticity rubber band 39 pulls closing plate 36 reverse upset this moment, and when closing plate 36 contradicted in spacing collar 37, elasticity rubber band 39 also got into and accomodates chamber 38 and accomodate, sealed with medium-pressure pipe 3 through closing plate 36 this moment, causes the damage to the respiratory track of being saved personnel when avoiding the dust to get into medium-pressure pipe 3.

The working principle is as follows: when a fireman needs to wear the air respirator for emergency rescue, the air bottle 11 and all pipelines are checked first, and after the condition that the fireman is correct is ensured, the harness 1 and the air bottle 11 are worn on the back of the fireman. Then one of the full face masks 4 is fixed on the back tool 1, the other full face mask 4 is worn on the face, and the fire fighter can breathe to use after opening the cylinder valve of the gas cylinder 11 and the rotary valve 22 for controlling the full face mask 4 worn by the fire fighter to open and close. When the firefighter searches for the person to be rescued, the firefighter releases the locking member 5, removes the other full facepiece 4 from the harness 1, rotates the other rotary valve 22 so that the air in the decompressor 2 can flow into the full facepiece 4, and then fixes the full facepiece 4 to the head and face of the person to be rescued.

Example 2: an air respirator, as shown in fig. 9 and 10, is different from the embodiment in that: locking piece 5 is including setting up first gag lever post 53 on full face guard 4, set up the second gag lever post 54 on back of the body utensil 1, the inside of second gag lever post 54 is provided with cavity 541, the terminal surface of second gag lever post 54 is provided with the spacing groove 542 that communicates in cavity 541, the terminal surface of first gag lever post 53 is provided with a plurality of flexure strips 531 that are used for pegging graft spacing groove 542, the one end that flexure strip 531 deviates from first gag lever post 53 is the setting of keeping away from each other, one side outer wall that flexure strip 531 deviates from each other all is provided with the pothook 532 of hooking tight cavity 541 inner wall behind wearing to establish spacing groove 542, the outer wall sliding connection of first gag lever post 53 has the sliding sleeve 6 that is used for driving a plurality of flexure strips 531 and is the direction motion of.

As shown in fig. 10 and 11, a positioning plate 7 is disposed on an outer wall of an end of the first limiting rod 53 away from the elastic piece 531, an elastic limiting block 61 is disposed at an end of the sliding sleeve 6 close to the positioning plate 7, a groove 71 for embedding the elastic limiting block 61 is disposed on a side wall of the positioning plate 7, and an arc-shaped annular groove 72 communicated with the groove 71 and used for sliding and embedding the elastic limiting block 61 is disposed on a side wall of the positioning plate 7.

When the whole mask 4 needs to be fixed on the back tool 1, the sliding sleeve 6 is rotated, the sliding sleeve 6 drives the elastic limiting block 61 to slide along the inner wall of the annular groove 72 on the positioning plate 7, when the elastic limiting block 61 slides to the position of the groove 71, the sliding sleeve 6 is pulled to drive the elastic limiting block 61 to separate from the groove 71, then the sliding sleeve 6 is pushed to slide along the outer wall of the first limiting rod 53, and the elastic pieces 531 are pressed by the sliding sleeve 6 to be close to each other and tightened until the sliding sleeve 6 slides to the position of the elastic pieces 531.

Until the elastic piece 531 and the hook 532 are aligned with the limit groove 542 on the second limit rod 54, the first limit rod 53 is pushed to drive the elastic piece 531 and the hook 532 to be inserted into the limit groove 542 and embedded into the cavity 541 in the second limit rod 54, the sliding sleeve 6 is pulled to move in the reverse direction, at this time, the elastic piece 531 springs open and moves away from each other, at this time, the elastic piece 531 drives the hook 532 to hook the inner wall of the cavity 541, so that the locking between the first limit rod 53 and the second limit rod 54 is completed, then the elastic limit block 61 on the sliding sleeve 6 is embedded into the groove 71 on the positioning plate 7, the sliding sleeve 6 is rotated to enable the elastic limit block 61 to be embedded into the annular groove 72, and the sliding sleeve 6 is fixed by using the friction force between the two, so that the fixing of the.

When the whole mask 4 needs to be taken down from the back tool 1, the sliding sleeve 6 is rotated to take the sliding sleeve 6 down from the positioning plate 7, the sliding sleeve 6 is pushed to move towards the elastic piece 531 along the first limiting rod 53, at the moment, the sliding sleeve 6 gradually presses the elastic piece 531 to get close to each other, after the elastic piece 531 drives the hook 532 to be separated from the inner wall of the cavity 541, the first limiting rod 53 is pulled to drive the elastic piece 531 and the hook 532 to move outwards along the limiting groove 542 until the whole mask is completely separated from the limiting groove 542, the whole mask 4 is taken down, and at the moment, the whole mask 4 can be worn on the head of the rescued person.

The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (5)

1. The utility model provides an air respirator, includes back of the body utensil (1), sets up in gas cylinder (11) on back of the body utensil (1), be provided with on back of the body utensil (1) communicate in pressure reducer (2) of gas cylinder (11) cylinder valve, its characterized in that: the pressure reducer (2) is provided with a pair of output end interfaces (21), the middle parts of the pair of output end interfaces (21) are respectively provided with a rotary valve (22), the pair of output end interfaces (21) are respectively provided with a medium-pressure pipe (3), the end parts of the pair of medium-pressure pipes (3) are respectively provided with an air supply joint (31), the pair of air supply joints (31) are respectively provided with a full face mask (4), and the back tool (1) is provided with a locking piece (5) for fixing one of the full face masks (4) to the back tool (1); the locking piece (5) comprises a first locking block (51) arranged on the full face mask (4) and a second locking block (52) arranged on the back tool (1), wherein a locking groove (521) for the first locking block (51) to be inserted is arranged on the second locking block (52), two opposite inner walls of the locking groove (521) are respectively provided with a locking hole (522), sliding holes (511) which are communicated with each other are penetrated through two sides of the first locking block (51), a pair of sliding rods (512) for inserting the locking holes (522) are connected in the sliding holes (511) in a sliding mode, a spring (513) positioned between the pair of sliding rods (512) is arranged in each sliding hole (511), two ends of each spring (513) are fixed on the end faces of the pair of sliding rods (512), and a sliding groove (516) communicated with the sliding holes (511) is arranged on the first locking block (51), the pair of sliding rods (512) are respectively provided with a deflector rod (517) which penetrates through the sliding groove (516) and is positioned outside the first locking block (51); the end face of one sliding rod (512) is provided with a guide post (514) for sleeving the spring (513), and the end face of the other sliding rod (512) is provided with a guide hole (515) for inserting the guide post (514); the medium-voltage tube (3) comprises a plurality of hollow tube bodies (32), inner edges (33) are arranged on the inner walls of two ends of each of the tube bodies (32), a hollow elastic connecting tube (34) is connected between every two adjacent tube bodies (32) in a sliding mode, the outer wall of each connecting tube (34) is abutted against the inner wall of each inner edge (33), and outer edges (35) used for abutting against the end faces of the inner edges (33) are arranged on the outer walls of two ends of each connecting tube (34); the pipe bodies (32) positioned at the two ends of the medium-pressure pipe (3) are internally provided with cross beams (321), and an elastic rope (322) is arranged between a pair of the cross beams (321); one of them is provided with crossbeam (321) body (32) inner wall articulates there is closing plate (36), closing plate (36) are located the mouth of pipe of body (32) with between crossbeam (321), the inner wall of body (32) is provided with and is used for conflicting spacing collar (37) of closing plate (36) terminal surface just spacing collar (37) are located closing plate (36) with between crossbeam (321), be provided with a plurality of storage chamber (38) on spacing collar (37), be provided with elasticity rubber band (39) in storage chamber (38), elasticity rubber band (39) one end is fixed in storage chamber (38) diapire and the other end are fixed in the lower terminal surface of closing plate (36).

2. An air respirator according to claim 1, wherein: the locking piece (5) comprises a first limiting rod (53) arranged on the full face mask (4) and a second limiting rod (54) arranged on the back piece (1), a cavity (541) is arranged inside the second limiting rod (54), a limiting groove (542) communicated with the cavity (541) is arranged on the end surface of the second limiting rod (54), the end surface of the first limiting rod (53) is provided with a plurality of elastic sheets (531) for inserting the limiting grooves (542), one ends of the elastic pieces (531) departing from the first limiting rods (53) are arranged away from each other, the outer walls of the sides of the elastic pieces (531) which are deviated from each other are provided with clamping hooks (532) which penetrate through the limiting grooves (542) and are tightly hooked on the inner wall of the cavity (541), the outer wall of the first limiting rod (53) is connected with a sliding sleeve (6) in a sliding mode, the sliding sleeve is used for driving the elastic pieces (531) to move in the direction of mutual approaching.

3. An air respirator according to claim 2, wherein: first gag lever post (53) deviate from the one end outer wall of flexure strip (531) sets up locating plate (7), sliding sleeve (6) are close to the one end of locating plate (7) is provided with elasticity stopper (61), locating plate (7) lateral wall is provided with the confession recess (71) of elasticity stopper (61) embedding, locating plate (7) lateral wall be provided with communicate in recess (71) and confession elasticity stopper (61) slide the ring channel (72) of the circular arc type of embedding.

4. An air respirator according to claim 1, wherein: full face guard (4) including full transparent face guard main part (41) and with the oral nasal mask (42) of laminating mutually, be provided with on face guard main part (41) with air supply valve (43) that air feed joint (31) are linked together, air supply valve (43) are located face guard main part (41) with position department between oral nasal mask (42) is provided with jet orifice (431), be provided with a pair of one-way inspiratory valve (44) on oral nasal mask (42), face guard main part (41) and intercommunication each other has discharge valve (45) between oral nasal mask (42).

5. An air respirator according to claim 4, wherein: be provided with intercom (12) on harness (1), face guard main part (41) and intercommunication each other has sound conduction pipe (46) between oronasal mask (42), be provided with sound conduction ware (47) on sound conduction pipe (46), be provided with headset (48) on sound conduction ware (47) and be used for pegging graft connector (49) of intercom (12).

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