CN214074751U - Air supply device for respirator mask - Google Patents

Abstract

The utility model discloses an air supply device for a respirator mask, which comprises an air valve, wherein the air valve is provided with a change-over switch mechanism; the air bypass module is provided with a bypass change-over switch; the bypass change-over switch controls the air bypass channel or the air valve of the air bypass module to be switched on alternatively. The utility model discloses the air feeder makes the direct switching of ambient air and compressed gas cylinder more convenient through linkage switching mechanism, avoids destroying the leakproofness of air exchange system; the potential safety hazard is avoided.

Description

Air supply device for respirator mask

Technical Field

The utility model belongs to the technical field of personal respiratory protection, emergency rescue, a take air feeder and air respirator face guard of ambient air bypass is related to.

Background

The positive pressure air respirator that emergency rescue personnel (including the fireman, the rescue team member) used is one kind and uses compressed air as the isolated respirator of breathing air supply, the compressed air who uses is stored in the high-pressure gas bomb of taking certainly, except that high-pressure gas bomb, positive pressure air respirator still includes the pressure reducer, the high pressure air duct, the warning whistle manometer, the middling pressure air duct, the air feed valve, the face guard, parts such as backplate braces, its work flow is that the high-pressure gas bomb of installing on the backplate braces that is used for personnel to bear passes through the pressure reducer decompression back and gets into the middling pressure air duct, the air feed valve, and finally get into the face guard and supply personnel to breathe, high-pressure gas bomb passes through the high pressure air duct simultaneously and is connected with warning whistle manometer, be used for monitoring gas pressure in the gas cylinder, thereby monitor the tolerance of residual gas.

According to the general configuration of the positive pressure type air respirator, namely the water volume of the air bottle is 6.8L, the rated working pressure is 30MPa, the gas storage amount in the air bottle is about 2000L under the standard atmospheric pressure condition, and the respiratory capacity is 50L/min under the manual working state, so that the theoretical maximum service time of a person wearing the respirator is only 40 min.

In practical application, when a wearer does not enter a rescue area, in order to save air sources and air wasted in the situations of wearing, inspection before use and the like, the wearer generally breathes ambient air in a mode of not wearing a mask or only wearing the mask and not wearing an air supply valve, and then wears the mask, the air supply valve and compressed air in an air breathing apparatus when the wearer enters dangerous environments such as the rescue area and the like. So wear face guard, plug air feed valve repeatedly, can greatly increased face guard and the sealed of parts such as people's face, air feed valve and face guard, middling pressure air duct, lead to respirator system gas leakage, bring great dangerous hidden danger.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas supply device which has novel and unique structure and convenient use and can improve the sealing performance of the breathing mask; the specific technical scheme is as follows:

an air supply device for a respirator mask comprises an air supply valve and an air valve mounting seat, wherein the air supply valve is provided with a breathing switching switch mechanism; the air bypass module is provided with a bypass change-over switch; and the bypass change-over switch controls the air supply valve or the air bypass channel of the air bypass module to be selectively opened.

Further, the air bypass module comprises a switching deflector rod and an air bypass channel switching mechanism which are linked; the switching deflector rod is linked with a diaphragm connecting rod of the air supply valve breathing switching mechanism; the switching deflector rod is inserted with a membrane connecting rod support frame, and the membrane connecting rod support frame abuts against the inner side of a membrane connecting rod of the switching switch mechanism; the switching deflector rod is pulled, and the diaphragm connecting rod turns outwards to close the air valve.

Further, the air bypass channel switch mechanism is a switching track which is arranged on the bypass switching switch and drives the switching deflector rod to rotate; the bypass switch is turned on, and the switching deflector rod moves along the switching track to close the air valve; the bypass switch is turned off, and the switching deflector rod moves along the switching track to open the air valve.

Further, the air bypass channel switch mechanism comprises an air bypass channel switch, a pressure rod, a bypass closing sealing rubber gasket, a pressure rod return spring and a top block; a bypass closing sealing rubber gasket covering the air bypass channel is arranged at the front end of the pressure rod, the rear end of the pressure rod is hinged with a pressure rod shaft, and a pressure rod reset spring is arranged on the pressure rod shaft; the bypass change-over switch is provided with a top block and is hinged with the air valve mounting seat; the bypass switch is turned on, the ejector block jacks up the pressure rod, and the air bypass channel is opened; the bypass switch is turned on, and the pressure lever reset spring resets the pressure lever to close the air bypass channel.

Further, the air bypass module is also provided with a locking mechanism for locking the bypass change-over switch.

Furthermore, the locking mechanism comprises a locking rod positioning hole arranged on the bypass switch and a locking rod which is fixed on the air valve mounting seat in a sliding manner and is inserted into the locking rod positioning hole during locking.

Furthermore, the locking mechanism is also provided with a locking handle, and the locking handle and the air valve mounting seat are arranged on the locking mechanism; the locking rod is hinged with the locking handle to form a connecting rod mechanism, and the locking rod is controlled to move along the axial direction of the locking rod through the locking handle.

Further, the locking handle is provided with a limit indicator; the limit indicator is linked with the locking handle, and when the locking handle is located at an unlocking position, the limit indicator is screwed out of the limit indicator groove.

The utility model also provides a respirator that is equipped with above-mentioned air feeder.

The utility model discloses the air feeder makes the direct switching of ambient air and compressed gas cylinder more convenient through linkage switching mechanism, avoids destroying the leakproofness of air exchange system; the potential safety hazard is avoided.

Drawings

FIG. 1 is a schematic view of a respiratory mask equipped with a gas supply;

FIG. 2 is a schematic view of a portion of the mask;

FIG. 3 is a schematic view of the structure of the oronasal mask;

FIG. 4 is a left side view of the schematic of the valve configuration;

FIG. 5 is a view taken along line A-A of FIG. 4;

FIG. 6 is a front view of a schematic of a valve configuration;

FIG. 7 is a view taken along section F-F of FIG. 6;

FIG. 8 is a front view of the environmental air bypass control module according to the present invention;

FIG. 9 is a view taken along line A-A of FIG. 8;

FIG. 10 is a view taken along line B-B of FIG. 8;

FIG. 11 is a view of section C-C of FIG. 8;

FIG. 12 is a view taken along section D-D of FIG. 8;

FIG. 13 is a schematic top view of the environmental air bypass control module of the present invention;

fig. 14 is a rear view of the structure of the ambient air bypass control module according to the present invention.

In the figure: 1. a face mask; 2. an oronasal mask; 3. an air supply valve; 3-1, valve base body; 3-2, a base body sheath; 3-3, a diaphragm connecting rod base; 3-4, a diaphragm connecting rod; 3-5, a membrane hoop; 3-6, breathing membrane; 3-7, an air supply valve adjusting spring; 3-8, connecting rod inserting pins; 3-9, air supply valve shell; 3-10, an air supply valve base; 3-11, a sheath; 3-12, a medium-pressure conduit sealing ring; 3-13, an air supply valve sealing ring; 3-14, a medium pressure joint positioning ring; 3-15, a support frame return spring; 3-16, a switching deflector rod; 3-17, a diaphragm connecting rod support frame; 3-18, valve seat reset spring; 3-19, valve core fixing pin; 3-20, a valve core spring; 3-21, valve core; 3-22, valve seat; 3-23, valve sealing sleeve; 3-24, a quantification hole; 3-25, medium-pressure joint; 3-26, an exhalation outlet; 3-27, connecting rod dead axle; 3-28, expiration detecting tube; 3-29, connecting rod moving shaft; 4. a gas supply valve mounting seat; 4-1, dust screen; 4-2, a loudspeaker protective shell; 4-3, fixing screws; 4-4 bypass change-over switch; 4-5, closing the sealing rubber gasket by bypassing; 4-6, a top block; 4-7, a compression bar; 4-8, air supply valve switching track; 4-9, lock rod positioning holes; 4-10, baffle reset spring; 4-11, a baffle opening bracket; 4-12, a bypass closing baffle; 4-13, an exhaust valve plate; 4-14, a locking handle return spring; 4-15, a clamp spring; 4-16, a fixing pin; 4-17, lock bar; 4-18, a locking handle; 4-19, mounting base inner shell; 4-20 installing seat outer shell; 4-21, a loudspeaker; 4-22, a microphone membrane; 4-23, fixing a plectrum of the loudspeaker; 4-24, grub screws; 4-25 and a limit indicator.

Detailed Description

The present invention will be more fully described with reference to the following examples. The present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 3, the breathing mask in the present embodiment includes a face mask 1, an oronasal mask 2, a supply air valve 3, and a supply air valve mount; and an ambient air bypass control module 4 is arranged on the air supply valve mounting seat. The face mask 1 and the mouth-nose mask 2 adopt the prior art.

As shown in fig. 4 to 7, the air supply valve 3 includes a housing, a valve base 3-1, and a valve core 3-21. The front end of the valve base body 3-1 is provided with a medium-pressure joint 3-25 connected with a compressed air source; the bottom of the medium pressure joint 3-25 is provided with a valve seat hole. The sheath 3-11 secures the medium pressure connector 3-25 to the supply valve base 3-10. The sealing rings 3-12 of the medium-pressure guide pipe achieve the sealing effect when the medium-pressure joint 3-25 is connected with the medium-pressure pipe. The air supply valve sealing ring 3-13 enables the interior of the air supply valve base 3-10 to form a sealed space.

The valve seats 3-22 are inserted in the valve seat holes; the front ends of the fixed valve seats 3-22 are provided with quantitative holes 3-24; the flow of compressed air is restricted by the metering orifices 3-24. The rear end of the valve seat 3-22 is provided with a matrix sheath 3-2, the valve matrix 3-1 is divided into a front part and a rear part, the matrix sheath 3-2 is made of rubber and is sleeved outside the rear valve matrix; after the front valve base body and the rear valve base body are spliced, the outer surface of the front end of the rear valve base body is provided with an annular clamping groove or a semi-annular clamping groove, holes are formed in the clamping groove, and the clamping grooves are connected together through clamping ring middle-pressure joints and positioning rings 3-14; the positioning rings 3-14 of the clamping ring medium-pressure joint are of clamping ring structures, pin columns are arranged on the inner sides of the clamping rings, when the clamping rings are clamped into the clamping grooves, the pin columns are inserted into holes in the clamping grooves, the hole diameter of each hole is larger than the size of each pin column, and the distance between the front part and the rear part of the assembled valve base body to move back and forth is limited; the assembly is convenient. The diaphragm connecting rod base 3-3 is connected with the rear end of the valve base body 3-1 through threads to fix the base body sheath 3-2. The rear part of the valve core 3-21 is provided with a long through groove, the rear valve base body is provided with a pin hole, and the valve core fixing pin 3-19 is inserted into the pin hole and penetrates through the long through groove to limit the moving distance of the valve core 3-21 in the valve base body 3-1; when the valve core 3-21 is in the valve opening state, pretightening force is provided for the valve core spring 3-20. The front part of the valve core 3-21 is provided with a spring retainer ring, when the valve is closed, the valve core 3-21 moves forward relatively and is close to the valve seat 3-22, and when the valve is closed, the valve core spring 3-20 pushes a spring washer to buffer the impact force when the valve is closed. The valve cavity in the shell is divided into a front part and a rear part by the matrix sheath 3-2, the front part is communicated with the opening of the valve matrix 3-1, and after the valve is opened, medium-pressure gas enters the air inlet cavity of the air supply valve mounting seat from the opening of the valve matrix 3-1 through the valve outlet and enters the mask part from the outlet beside the air inlet cavity. The shell is also provided with an expiration detection tube 3-28, and the front end of the expiration detection tube 3-28 is inserted into an expiration outlet of the air supply valve mounting seat; the rear end is communicated with the rear part of the valve cavity.

An air supply valve adjusting spring 3-7 is arranged in the cavity at one side of the diaphragm cavity far away from the diaphragm connecting rod 3-4; when the air is sucked, the air supply valve adjusting spring 3-7 pushes the diaphragm to reset. The membrane hoop 3-5 clamps the breathing membrane 3-6 in the membrane cavity.

The breathing membrane 3-6 is pressed by the adjusting spring 3-7 of the air supply valve, so that the breathing membrane 3-6 is attached to the inner side of the base 3-10 of the air supply valve, all parts of the air supply valve 1-3 are in an initial state, an air supply channel is in an open state, when a user exhales, the pressure of the exhaled air enters the air supply valve 3, and the air pushes the breathing membrane 3-6 to move towards the shell 3-9 of the air supply valve, so that the membrane connecting rod 3-4 is driven to move towards the shell 3-9 of the air supply valve, all related parts are triggered to move, the air supply channel of compressed air of the air cylinder is cut off, and the purpose of saving the compressed air is achieved.

The diaphragm connecting rod 3-4, the connecting rod dead axle 3-27, the connecting rod dead axle 3-29 and the valve seat 3-22 form a connecting rod mechanism; wherein, the upper connecting rod dead axle 3-27 is fixed on the air supply valve base 3-10; the connecting rod dead axle 3-29 realizes the hinged connection of the valve seat 3-22 and the membrane connecting rod 3-4.

The membrane connecting rod 3-4 is connected with the breathing membrane 3-6 through a connecting rod inserting pin 3-8, and the connecting rod inserting pin 3-8 and the inserting pin seat form a sliding sleeve which is sleeved on the membrane connecting rod 3-4. The breathing membrane 3-6 drives the membrane connecting rod 3-4 to move towards the direction of the air supply valve shell 3-9 by the gas pressure generated when a user exhales, so as to drive the valve seat 3-22 to move towards the opposite direction, the gas channel of the valve seat 3-22 is sealed by the valve core 3-21, and simultaneously the valve seat 3-22 is connected with the valve sealing sleeve 3-23, so that the air supply channel of the compressed air of the air bottle is cut off, and the function of saving the compressed air of the air bottle is achieved. When a user inhales, the air pressure disappears, the breathing diaphragm drives each relevant part to reset, the air supply channel of the air supply valve 3 is opened again, and the air supply of the air supply valve 3 is achieved. The valve seat return spring 3-18 makes the valve seat 3-22 return and opens the air supply valve 3.

The valve sealing sleeves 3-23 are arranged at the connecting parts of the quantitative holes 3-24 and the medium-pressure joints 3-25 for sealing.

As shown in fig. 8 to 14, the air supply valve attachment seat is divided into two front and rear chambers, the front chamber communicates with the outlet of the air supply valve 3, and the side opening communicates with the mask portion. The rear chamber is in communication with the oronasal mask. The lower part of the separation wall of the front chamber and the rear chamber is provided with an exhaust valve plate 4-13 and a baffle plate opening bracket 4-11; the baffle opening bracket 4-11 is arranged at the inner side of the exhaust valve plate 4-13, and the exhaust valve plate 4-13 is provided with a baffle return spring 4-10; a one-way valve is formed that can only rotate in the direction of the front chamber, allowing air to enter the front chamber from the rear chamber.

The expiration detecting tube of the air supply valve 3 is inserted into the expiration outlet 3-26 on the partition wall; the outer wall of the expiration detection tube is in close contact with the expiration outlet, so that sealing is realized.

The air supply valve mounting seat 4 comprises a mounting seat inner shell 4-19 and a mounting seat outer shell 4-20. The mounting seat inner shell 4-19 is used for connecting and fixing the oronasal mask 2, the face mask 1 and the mounting seat outer shell 4-20. The mount outer case 4-20 is used to fix the supply valve 3.

An ambient air channel is arranged on the front wall of the front cavity of the air supply valve mounting seat 4; a bypass change-over switch rotating shaft is arranged on the left side of the air supply valve mounting seat; the bypass change-over switch 4-4 is hinged with the air supply valve mounting seat 4 through a bypass change-over switch rotating shaft. A pressure lever 4-7 is arranged on the bypass change-over switch 4-4, a bypass closing sealing rubber gasket 4-5 is arranged at the front end of the pressure lever, the rear end of the pressure lever 4-7 is hinged with the bypass change-over switch 4-4 through a pressure lever shaft, and a pressure lever reset spring is arranged on the pressure lever shaft; the pressure lever return spring presses the bypass closing sealing rubber mat 4-5 at the front end of the pressure lever 4-7 to seal the air bypass channel; the bypass change-over switch 4-4 is provided with a top block 4-6, the bypass change-over switch is turned on, the top block 4-6 jacks up the pressure lever 4-7, and the air bypass channel is opened.

A switching deflector rod 3-16 is arranged at a position close to the rotating shaft of the diaphragm connecting rod 3-4; the rotation axis of the switching lever 3-16 is parallel to the rotation axis of the diaphragm link 3-4. The membrane connecting rod support frame 3-17 is fixed on a rotating shaft of the switching deflector rod 3-16; and rotating the switching deflector rod 3-16, and rotating the diaphragm connecting rod 3-4 through the diaphragm connecting rod supporting frame 3-17 to close the air supply valve 3. The support frame reset springs 3-15 reset the membrane connecting rod support frames 3-17 after movement.

The end part of the rotating handle of the switching shift lever 3-16 is provided with an outward bulge; an air supply valve switching track 4-8 is arranged on the bypass switch 4-4; the protrusions are inserted into the supply valve switching rails 4-8. The bypass switch 4-4 is turned over outwards, and the bulge slides in the air supply valve switching track 4-8 to drive the switching deflector rod 3-16 to rotate, so that the air supply valve 3 is closed.

To avoid false operation, the bypass changeover switch 4-4 is also provided with a lock mechanism. The locking mechanism consists of a locking rod positioning hole 4-9 and a locking rod 4-17; the lock rod positioning hole 4-9 is arranged on the bypass change-over switch 4-4, when the lock rod 4-17 is in a closed state, the lock rod is inserted into the lock rod positioning hole 4-9 for locking, and the bypass change-over switch 4-4 cannot rotate.

In order to facilitate locking, the locking mechanism is also provided with a locking handle 4-18, and the locking handle 4-18 drives the locking rod 4-17 to move up and down through a link mechanism. The locking handle 4-18 is hinged with the air supply valve mounting seat 4 through a fixing pin 4-16; the fixing pins 4-16 are fixed by the snap springs 4-15 to prevent falling off. The top end of the lock rod is hinged with the locking handles 4-18 through another pin shaft to form a connecting rod mechanism. The locking handle 4-18 is also provided with a locking handle return spring 4-14 for returning the locking handle 4-18.

The other end of the locking handle can be also provided with a warning strip block with bright color as a limit indicator 4-25; a warning strip block hiding groove is arranged on the air supply valve mounting seat 4; when the handle is in a normal state, the warning bar block is positioned in the warning bar block hiding groove; when the handle is pressed down, the warning strip block is lifted, and a user is warned.

To be suitable for left-handed operation, the axis of rotation of the ambient air bypass control module 4 may also be arranged on the right side.

The air supply valve mounting seat 4 is also provided with a loudspeaker 4-22, which is convenient for remote communication. The loudspeaker shield 4-2 is provided on the mask outer shell 4-20 for protecting the loudspeaker. The loudspeaker protective shell is fixed on the air supply valve mounting seat 4 by the fixing screws 4-3. The microphone holding paddle 4-23 is used to hold the microphone 4-21. The grub screws 4-24 are used for fixing the loudspeaker fixing plectrum 4-23.

The outside of the protective shell of the loudspeaker is provided with a dustproof net 4-1 for preventing dust. The microphone membrane 4-22 is mounted on one side of the oronasal mask.

When the ambient air bypass control module 4 is closed, the respirator functions the same as an existing respirator. Compressed air enters the face mask 1 after being decompressed from the air supply valve 3, enters the oral-nasal mask through a one-way valve between the face mask 1 and the oral-nasal mask 2 and is inhaled into a human body; the exhaust gas exhaled by the human body is exhausted from the oronasal mask 2 to the atmosphere through an exhaust valve plate 4-13 of the ambient air bypass control module 4 and a bypass closing sealing rubber gasket. When the ambient air can be breathed, a bypass change-over switch 4-4 of the ambient air bypass control module 4 is opened, the outer end of a change-over deflector rod 3-16 slides in an air supply valve change-over track 4-8 to drive the change-over deflector rod 3-16 to rotate, a diaphragm connecting rod 3-4 is driven to rotate by a diaphragm connecting rod support frame 3-17, and a valve core 21 is pushed to close the air supply valve 3.

The above examples are only for illustrating the present invention, and besides, there are many different embodiments, which can be conceived by those skilled in the art after understanding the idea of the present invention, and therefore, they are not listed here.

Claims (8)

1. An air supply device for a respirator mask comprises an air supply valve and an air valve mounting seat, wherein the air supply valve is provided with a breathing switching switch mechanism; the air bypass control device is characterized by further comprising an air bypass module, wherein the air bypass module is provided with a bypass change-over switch; and the bypass change-over switch controls the air supply valve or the air bypass channel of the air bypass module to be selectively opened.

2. The air supply apparatus according to claim 1, wherein the air bypass module includes a switching lever and an air bypass passage switching mechanism that are linked; the switching deflector rod is linked with a diaphragm connecting rod of the air supply valve breathing switching mechanism; the switching deflector rod is inserted with a membrane connecting rod support frame, and the membrane connecting rod support frame abuts against the inner side of a membrane connecting rod of the switching switch mechanism; the switching deflector rod is pulled, and the diaphragm connecting rod turns outwards to close the air valve.

3. The air supply device according to claim 2, wherein the air bypass passage switching mechanism is a switching track provided on the bypass switching switch to rotate the switching lever; the bypass switch is turned on, and the switching deflector rod moves along the switching track to close the air valve; the bypass switch is turned off, and the switching deflector rod moves along the switching track to open the air valve.

4. The air supply device according to claim 2, wherein the air bypass passage switching mechanism comprises an air bypass passage switch, a pressure lever, a bypass closing sealing rubber gasket, a pressure lever return spring and a top block; a bypass closing sealing rubber gasket covering the air bypass channel is arranged at the front end of the pressure rod, the rear end of the pressure rod is hinged with a pressure rod shaft, and a pressure rod reset spring is arranged on the pressure rod shaft; the bypass change-over switch is provided with a top block and is hinged with the air valve mounting seat; the bypass switch is turned on, the ejector block jacks up the pressure rod, and the air bypass channel is opened; the bypass switch is closed, the pressure lever reset spring resets the pressure lever, and the air bypass channel is closed.

5. The air supply apparatus as claimed in claim 1, wherein the air bypass module is further provided with a locking mechanism that locks the bypass changeover switch.

6. The gas supply device according to claim 5, wherein the locking mechanism comprises a locking rod positioning hole provided on the bypass switch and a locking rod slidably fixed on the valve mounting seat and inserted into the locking rod positioning hole when locked.

7. The gas supply apparatus of claim 6, wherein the locking mechanism is further provided with a locking handle, the locking handle and the valve mount; the locking rod is hinged with the locking handle to form a connecting rod mechanism, and the locking rod is controlled to move along the axial direction of the locking rod through the locking handle.

8. The gas supply apparatus of claim 7, wherein the locking handle is provided with a limit indicator; the limit indicator is linked with the locking handle, and when the locking handle is located at an unlocking position, the limit indicator is screwed out of the limit indicator groove.

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