CN111529978B

CN111529978B - Positive pressure air respirator capable of being inflated in one step

Info

Publication number: CN111529978B
Application number: CN202010262789.3A
Authority: CN
Inventors: 危金兰
Original assignee: Xinghua Tiandong Software Technology Co ltd
Current assignee: XINGHUA TIANDONG SOFTWARE TECHNOLOGY Co.,Ltd.
Priority date: 2018-04-09
Filing date: 2018-04-09
Publication date: 2021-06-04
Anticipated expiration: 2038-04-09
Also published as: CN108653944A; CN111529978A; CN108653944B

Abstract

The invention relates to a fire-fighting apparatus. A positive pressure air respirator capable of achieving inflation in one step comprises a head cover and an air bottle, wherein a valve is arranged at the upper end of the air bottle, a mask is arranged in the head cover, an air inlet communicated with the head cover is formed in the mask, a pressure limiting valve which is opened when the air pressure in the air bottle is above a set value is arranged on the valve, and an air outlet of the valve is connected with the air inlet through a rubber pipe. The invention aims to provide a positive pressure air respirator which can be filled to a set value at one time and can be inflated in one step, and solves the problem that the air pressure of the existing positive pressure air respirator can not be filled to the set value at one time.

Description

Positive pressure air respirator capable of being inflated in one step

This application is a divisional application of application No. 2018103089299, 2018, 09/04, entitled "positive pressure air respirator inflated in one step in place".

Technical Field

The invention relates to fire-fighting equipment, in particular to a positive pressure air respirator capable of being inflated in one step.

Background

The positive pressure eliminating air respirator is one isolated respirator with compressed air as breathing air source, and the used compressed air is stored in the air storing bottle, and the air supplying mode is positive pressure, so that when the respirator is worn to breathe, the whole breathing system is always in isolation with the outside and has inside pressure higher than the outside environment pressure. The device is widely applied to the fields of fire fighting, chemical defense, anti-terrorism, outburst treatment, emergency rescue and the like.

With the rapid development of economy and frequent natural disasters in China in recent years, the emergency rescue work also presents a complicated development trend across industries, fields and regions. Although China does a lot of work in the aspects of emergency rescue system construction, accident disaster treatment, prevention and the like, the emergency rescue technology and tactical research and other aspects are in the stage of starting, and especially the development of emergency rescue technology and equipment has a great gap with foreign countries. How to utilize the existing conditions that the existing rescue team in China lacks advanced and matched rescue equipment and the like to furthest exert the effects of the existing equipment of the positive pressure type air respirator and improve the rescue level is the primary task of quickly improving the fighting capacity of the rescue team in a short time. A basic structure of a conventional positive pressure air respirator is disclosed in patent publication No. CN2565465Y, and includes an air bottle, a face mask, and a shoulder strap structure for fixing the air bottle on the back of a user, and a valve is provided at the upper end of the air bottle.

The existing positive pressure air respirator has the following defects: when the air bottle is filled with gas, the gas is filled firstly, then the pressure is measured, if the pressure is higher, some gas is discharged to reduce the pressure, and if the pressure is lower, the tank is filled again, namely, the pressure in the air bottle is difficult to be filled to meet the requirement (usually 3 kilograms) in one step, namely, the air pressure in the air bottle cannot be enabled to be in place in one step.

Disclosure of Invention

The invention aims to provide a positive pressure air respirator which can be filled to a set value at one time and can be inflated in one step, and solves the problem that the air pressure of the existing positive pressure air respirator can not be filled to the set value at one time.

The technical problem is solved by the following technical scheme: the positive pressure air respirator capable of achieving inflation in one step comprises a head cover and an air bottle, wherein a valve is arranged at the upper end of the air bottle, a mask is arranged in the head cover, and is provided with an air inlet communicated with the head cover. The pressure limiting valve is arranged, whether the pressure limiting valve loses air is observed when the air bottle and the tank are inflated, if the air bottle and the tank are deflated, the pressure meets the requirement, and the tank is stopped, so that secondary pressure measurement and even heavy tank inflation are not needed, and the purpose that the tank inflation meets the requirement in one step is achieved.

Preferably, the valve is provided with a pressure limiting valve connecting hole, a first extrusion step is arranged at the inner end of the pressure limiting valve connecting hole, the pressure limiting valve comprises a shell, a second extrusion step is arranged on the pressure limiting valve comprising a shell, and the pressure limiting valve is arranged in the one-way valve mounting through hole in a penetrating mode and is connected with the one-way valve mounting through the first extrusion step and the second extrusion step in a sealing mode through matching with a rubber pad. The air pressure in the air bottle can play a role in increasing the extrusion force between the first extrusion step and the second extrusion step, and the sealing reliability is good under the condition of high extrusion force.

Preferably, the pressure limiting valve comprises a threaded column, wherein the outer end of the shell extends out of the one-way valve mounting through hole, and an extrusion nut is connected to the threaded column in a threaded mode. The first extrusion step and the second extrusion step are extruded to be sealed, and convenience in sealing is good.

Preferably, a buffer air bag is arranged in the head cover, a cover plate folding spring and a suction driving type cover plate opening mechanism are arranged in the mask, an oxygen bag interface communicated with the buffer air bag is arranged in the mask, an oxygen bag interface cover plate is arranged on the oxygen bag interface, the cover plate folding spring is used for driving the oxygen bag interface cover plate to seal the oxygen bag interface, the suction driving type cover plate opening mechanism is used for overcoming the elasticity of the cover plate folding spring to open the oxygen bag interface cover plate, the suction driving type cover plate opening mechanism comprises an air cylinder, a pry bar hinged in the mask and a balance plug located in the air cylinder, one end of the pry bar is connected with the oxygen bag interface cover plate, the other end of the pry bar is connected with the balance plug, and the force arm of the balance plug driving the pry bar to rotate is larger than the force arm of the cover plate folding spring driving, the balance plug divides the cylinder into a sealed cavity and an open cavity communicated with the mask; in an initial state, the air pressure of the opening cavity is greater than or equal to the air pressure of the sealing cavity, and the oxygen bag interface is sealed by the oxygen bag interface cover plate; when the pressure in the opening cavity is reduced due to inspiration, the pressure difference between the sealing cavity and the opening cavity drives the balance plug to move towards the opening cavity, so that the pry bar swings to overcome the elastic force of the cover plate folding spring, and the oxygen bag interface cover plate is opened. The buffering air bag is arranged, and the safety of the head sleeve can be ensured. When in use, the buffer air bag is filled with oxygen and the air pressure in the buffer air bag is more than 1.5 standard atmospheric pressures. Atmospheric pressure in the gauze mask risees when exhaling to make balanced stopper for moving towards sealed chamber, the structure of removal is balanced stopper and removes towards the direction of covering the oxygen export through the prying bar drive oxygen bag interface cover board, avoids the oxygen outflow in the buffering gasbag and leads to extravagantly. When breathing in, the air pressure in the mask is reduced, so that the balance plug moves towards the opening cavity under the action of pressure difference, and the balance plug drives the oxygen bag interface cover plate to open through the pry bar as a result of the movement, so that oxygen in the buffering air bag flows out of the mask to be inhaled by a user, the effect of increasing the oxygen content of the inhaled air is achieved, the discomfort of the user caused by the oxygen deficiency in a fire area is avoided,

preferably, the oxygen bag interface is communicated with the buffer air bag through a communicating pipe, and a manual valve is arranged on the communicating pipe. The oxygen in the buffer air bag can be reused when the user feels oxygen deficiency.

As preferred, the headgear is equipped with the neck section of cover on user's neck, the neck section is flexible structure, the neck section is equipped with the neck section and receives the mechanism that looses, the mechanism that looses is received to the neck section includes that the annular chamber, the rope that extend along neck section circumference unties the fastening mechanism and wear to establish the rope in the annular chamber, the rope unties the fastening mechanism and includes the circular arc pipe that extends along annular chamber circumference, be equipped with the cable removal clearance that extends along circular arc pipe extending direction on the wall of circular arc pipe, be equipped with two connecting blocks in the circular arc pipe, be located two connecting blocks between the rubber gas pole that extend along annular pipe extending direction and the connecting block that two connecting blocks of drive fold the spring, the both ends of rope alternately back one-to-one with two connecting blocks link together, the rubber gas pole is connected with the. The technical scheme with different technical concepts is provided for realizing the closing-in fixation of the lower end of the head sleeve and the neck.

The invention also comprises a control device, the two neck section folding and unfolding mechanisms are distributed along the up-down direction, the air charging and discharging port is connected with an air charging and discharging pump, and the control device controls the ropes of the two neck section folding and unfolding mechanisms to be alternately tightened according to a set time interval. Can avoid the neck injury caused by the rope being tied on the same position of the user's neck for a long time.

Preferably, the inflation and deflation pump is connected with the buffer air bag.

The invention has the following advantages: when the air bottle is filled with air, the air pressure can be filled to the set value at one time.

Drawings

Fig. 1 is a schematic diagram of a first embodiment of the invention.

Fig. 2 is a partially enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic structural diagram of a headgear according to a second embodiment of the invention.

Fig. 4 is a partially enlarged schematic view of fig. 3 at B.

FIG. 5 is a schematic cross-sectional view C-C of FIG. 3.

FIG. 6 is a schematic view showing the connection control relationship between the neck section retraction mechanism and the cushion bladder.

In the figure: an air bottle 1, a reinforcing sleeve 11, a head cover 2, a head section 21, a neck section 22, a buffer air bag 23, an oxygen bag interface 24, a communication pipe 25, a manual operation 26, an oxygen bag interface cover plate 28, a mask 3, a cover plate folding spring 33, a valve 4, a valve housing 41, a pressure limiting valve connecting hole 411, a first extrusion step 412, a rubber pad 413, an air passage 42, a valve core 43, a pressure limiting valve 44, a housing 441, a second extrusion step 442, a threaded column 443, an extrusion nut 444, a rubber pipe 45, a neck section folding and unfolding mechanism 5, a suspension ring 51, a rope 52, one end 521 of the rope, the other end 522 of the rope, a rope unfolding and fastening mechanism 53, an arc pipe 531, a rope moving gap 5311, a connecting block 532, a rubber air rod 533, and a rubber air rod connecting charging and discharging port 5331, a control device 534, an air charging and discharging pump 535, a one-way valve 6, a driving type air sucking, Pry bar 72, balance plug 73, hinge pin 74.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1, a positive pressure air respirator for one-step inflation comprises a head cover 2 and an air bottle 1.

The headgear 2 is provided with an air inlet 27. The mask 3 is arranged in the head cover 2. The air inlet 27 communicates with the inside of the mask.

The upper end and the lower end of the air bottle 1 are provided with reinforcing sleeves 11. The upper end of the air bottle 1 is provided with a valve 4. The valve 4 includes a valve housing 41, an air passage 42, and a valve core 43 for controlling opening and closing of the air passage. The valve housing 41 is screwed with the air bottle. The air duct 42 is provided with a pressure limiting valve 44 which opens towards the outside of the valve 4. The inlet end of the air passage 42 communicates with the interior of the air bottle 1. The outlet end of the air duct 42 constitutes the outlet of the valve 4. The air outlet of the valve 4 is connected with the air inlet 13 of the mask through a rubber pipe 45.

Referring to fig. 2, the valve housing 41 of the valve is provided with a pressure limiting valve connection hole 411. The inner end of the pressure limiting valve connection hole 411 is provided with a first pressing step 412. The first pressing step 412 is provided with a rubber pad 413. The pressure limiting valve 44 includes a housing 441. The housing 441 is provided with a second pressing step 442. The housing 441 is inserted into the pressure limiting valve connection hole 411. The first extrusion step 412 and the second extrusion step 442 clamp the rubber gasket 413 to realize the sealing connection of the pressure limiting valve and the valve. The outer end of the housing 441 protrudes out of the pressure limiting valve connection hole 411. The outer end of the housing 441 is provided with a threaded post 443. The threaded post 443 is threadedly coupled with a compression nut 444. The housing 441 is pulled outward by rotating the pressing nut 444 so that the second pressing step 442 cooperates with the first pressing step 412 to press the rubber packing 413 to achieve sealing.

Referring to fig. 1, when the air bottle is inflated, if the pressure limiting valve is deflated, the pressure in the air bottle is up to the requirement.

The second embodiment is different from the first embodiment in that:

referring to fig. 3, the head cover 2 of the oxygen bag mouthpiece cover 28 has a head section 21 and a neck section 22 that fits over the neck of the user. A cushion airbag 23 is provided in the head section 21. The cushion bladder 23 constitutes an inner surface layer of the head section except for the front side. The neck section is of a flexible construction. The neck section is provided with a neck section collecting and dispersing mechanism 5. The neck section is received and is scattered mechanism has two and distributes along upper and lower direction. The neck section retraction mechanism includes a suspension loop 51 circumferentially distributed along the neck section, a cord unfastening tie-down mechanism and a cord 52 threaded into the suspension loop. An air inlet 27 is provided at the front end of the face mask 3. The front end of the cover body is also provided with a one-way valve 6 for air outlet.

Referring to fig. 4, a cover plate folding spring 33 and a suction driving type cover plate opening mechanism 7 are arranged in the mask. An oxygen bag interface 24 communicated with the buffer air bag is arranged in the cover body. The oxygen bag interface is provided with an oxygen bag interface cover plate 28. The cover plate folding spring is used for driving the oxygen bag connector cover plate to seal the oxygen bag connector. The air suction driving type cover plate opening mechanism is used for overcoming the elasticity of the cover plate folding spring to open the oxygen bag interface cover plate. The suction-driven lid opening mechanism includes a cylinder 71, a pry bar 72, and a balanced plug 73 located within the cylinder. A pry bar 72 is hinged within the housing 31 by a hinge pin 74. One end of the pry bar is connected with the oxygen bag interface cover plate, and the other end of the pry bar is connected with the balance plug. The force arm of the balance plug driving pry bar rotating by taking the hinge pin as a shaft is larger than the force arm of the cover plate folding spring driving pry bar rotating by taking the hinge pin as a shaft. The balance plug divides the cylinder into a sealing cavity 711 and an opening cavity 712 communicated with the port cover; in the initial state, the air pressure of the sealing cavity is equal to that of the opening cavity, and the oxygen bag interface cover plate seals the oxygen bag interface 24 under the action of the cover plate folding spring; when the oxygen bag mouth cover plate is used, when the air pressure in the mask is reduced during air suction, the pressure in the opening cavity is reduced, the pressure difference between the sealing cavity and the opening cavity drives the balance plug to move towards the opening cavity, so that the prying bar swings to overcome the elastic force of the cover plate folding spring, and the oxygen bag mouth cover plate is opened. Pressure in the mask rises during expiration so that the pressure in the opening cavity rises, and the pressure difference drive balanced stopper in sealed chamber and opening cavity moves towards sealed chamber thereby makes the crow bar swing and helps apron to close the spring and make on the oxygen bag interface cover board oxygen bag interface of oxygen bag interface cover board more reliable. The oxygen bag interface is communicated with the buffer air bag through a communicating pipe 25. The communicating pipe is provided with a manual valve 26.

Referring to fig. 5 and 6, the cord untying tie-down mechanism 53 includes an arcuate tube 531 extending circumferentially along the annular cavity. The wall of the circular arc pipe is provided with a stay cable moving gap 5311 extending along the extension direction of the circular arc pipe. Two connecting blocks 532 and a rubber air rod 533 which is positioned between the two connecting blocks and extends along the extension direction of the annular pipe are arranged in the circular arc pipe. The two link blocks 532 are connected together by a link block closing spring (not shown) that drives the two link blocks to close. One end 521 of the rope and the other end 522 of the rope are crossed and are connected with the two connecting blocks in a one-to-one correspondence mode. Cord unwinding cinching mechanism 53 also includes control 534. The rubber air rod is connected with an air charging and discharging port 5331. The inflation and deflation ports are in communication with the cushion bladder via an inflation and deflation pump 535.

Referring to fig. 3, 5 and 6, the control device controls the ropes of the two neck section retraction mechanisms to be alternately tightened according to a set time interval, specifically, when the control device is used, the lower rope is firstly tightened to enable the neck section to be contracted and tightened on the neck of a user so as to reduce external air to enter the headgear to stimulate eyes, after a set time period, the upper rope is tightened to enable the neck section to be contracted and tightened, after the upper rope is tightened, the lower rope is loosened, after the time period, the lower rope is tightened to enable the neck section to be contracted and tightened, and after the lower rope is tightened, the upper rope is loosened, and the alternate tightening is circularly realized.

Referring to fig. 6, the process of tightening and loosening the cord is: when in fastening, the inflation rod is inflated through the inflation and deflation pump, and the inflation rod inflates and swells to drive the pair of connecting blocks to be separated, so that a ring enclosed by the ropes is reduced, and fastening is realized; when the rope is loosened, the two-way inflation pump pumps out the gas in the inflation rod, so that the inflation rod is shrunken and loses the supporting function, and the two connecting blocks are folded under the action of the connecting block folding spring to enable the rope to lose the tension force.

Claims

1. A positive pressure air respirator capable of achieving inflation in one step comprises a head cover and an air bottle, wherein a valve is arranged at the upper end of the air bottle, a mask is arranged in the head cover, an air inlet penetrating through the head cover is formed in the mask, the positive pressure air respirator is characterized in that the valve is provided with a pressure limiting valve which is opened when the air pressure in the air bottle is above a set value, an air outlet of the valve is connected with the air inlet through a rubber pipe, the head cover is provided with a neck section sleeved on the neck of a user, the neck section is of a flexible structure and provided with a neck section folding and unfolding mechanism, the neck section folding and unfolding mechanism comprises an annular cavity extending along the circumferential direction of the neck section, a rope fastening and unfolding mechanism and a rope penetrating through the annular cavity, the rope fastening and unfolding mechanism comprises an arc pipe extending along the circumferential direction of the annular cavity, and the wall of the arc pipe is provided with, the mask is characterized in that two connecting blocks, a rubber air rod and a connecting block folding spring are arranged in the arc tube, the rubber air rod is located between the two connecting blocks and extends along the extension direction of the annular tube, the connecting block folding spring drives the two connecting blocks to fold, two ends of the rope are connected with the two connecting blocks in a one-to-one correspondence mode after crossing, the rubber air rod is connected with an air charging and discharging port, a buffering air bag is arranged in the head sleeve, a cover plate folding spring and an air suction driving type cover plate opening mechanism are arranged in the mask, an oxygen bag interface communicated with the buffering air bag is arranged in the mask, the oxygen bag interface is provided with an oxygen bag interface cover plate, the cover plate folding spring is used for driving the oxygen bag interface cover plate to seal the oxygen bag interface, the air suction driving type cover plate opening mechanism is used for overcoming the elasticity, The oxygen bag connector comprises a pry bar and a balance plug, wherein the pry bar is hinged in the mask, the balance plug is positioned in an air cylinder, one end of the pry bar is connected with the oxygen bag connector cover plate, the other end of the pry bar is connected with the balance plug, the force arm for driving the pry bar to rotate by the balance plug is larger than the force arm for driving the pry bar to rotate by a cover plate folding spring, and the air cylinder is divided into a sealed cavity and an open cavity communicated with the mask by the balance plug; in an initial state, the air pressure of the opening cavity is greater than or equal to the air pressure of the sealing cavity, and the oxygen bag interface is sealed by the oxygen bag interface cover plate; when the pressure in the opening cavity is reduced due to air suction, the pressure difference between the sealing cavity and the opening cavity drives the balance plug to move towards the opening cavity, so that the prying bar swings to overcome the elastic force of the cover plate folding spring to open the oxygen bag interface cover plate; the positive pressure air respirator capable of achieving one-step inflation in place further comprises a control device, the two neck section folding and unfolding mechanisms are distributed in the vertical direction, the inflation and deflation ports are connected with inflation and deflation pumps, and the control device controls the ropes of the two neck section folding and unfolding mechanisms to be alternately tightened according to a set time interval; the inflation and deflation pump is connected with the buffer air bag.

2. The positive pressure type air respirator capable of achieving one-step inflation as claimed in claim 1, wherein the valve is provided with a pressure limiting valve connecting hole, a first extrusion step is arranged at the inner end of the pressure limiting valve connecting hole, the pressure limiting valve comprises a shell, a second extrusion step is arranged on the shell, and the pressure limiting valve penetrates through the pressure limiting valve connecting hole and is connected together in a sealing mode through the first extrusion step and the second extrusion step which are matched with rubber pads.

3. The positive pressure type air respirator capable of being inflated in one step according to claim 2, wherein the outer end of the shell extends out of the pressure limiting valve connecting hole and is provided with a threaded column, and a squeezing nut is connected to the threaded column in a threaded manner.

4. The positive pressure air respirator of claim 1, wherein the oxygen bag port is connected to the buffer bag via a connecting tube, and the connecting tube is provided with a manual valve.