CN110694191A - Mask bypass atmosphere device and fire-fighting air respirator - Google Patents
Mask bypass atmosphere device and fire-fighting air respirator Download PDFInfo
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- CN110694191A CN110694191A CN201911107549.XA CN201911107549A CN110694191A CN 110694191 A CN110694191 A CN 110694191A CN 201911107549 A CN201911107549 A CN 201911107549A CN 110694191 A CN110694191 A CN 110694191A
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- valve
- bypass
- limiting
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- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 11
- 239000000084 colloidal system Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 239000003570 air Substances 0.000 abstract description 83
- 239000012080 ambient air Substances 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 24
- 230000029058 respiratory gaseous exchange Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/02—Respiratory apparatus with compressed oxygen or air
- A62B7/04—Respiratory apparatus with compressed oxygen or air and lung-controlled oxygen or air valves
Abstract
The invention provides a mask atmosphere bypass device and a fire-fighting air respirator, which are characterized by comprising: the interface piece is provided with a relative inner side and an outer side, the inner side of the interface piece is provided with a first interface used for connecting the oral-nasal mask, and the outer side of the interface piece is respectively provided with a second interface used for connecting a compressed air supply device and a third interface used for communicating the external environment; the air valve unit is arranged at the position of the third interface and used for controlling the communication state of the third interface and the external environment; and the interface cover is matched with the interface piece and covered, and is provided with a first vent hole corresponding to the second interface and a second vent hole corresponding to the third interface. The mask bypass atmosphere device and the fire-fighting air respirator realize one-key communication or one-key isolation of external ambient air on the basis of providing a compressed air supply source.
Description
Technical Field
The invention relates to the technical field of fire-fighting articles, in particular to a mask bypass atmosphere device and a fire-fighting air respirator.
Background
The positive pressure type fire-fighting air respirator is a respiratory protection product, is equipment for providing effective respiratory protection for preventing toxic and harmful substances from being inhaled when a user works in an oxygen-deficient toxic and harmful gas environment, and is generally used in fire-fighting fire scene, chemical plant, laboratory, chemical toxic substance leakage scene and the like.
When the existing positive pressure type fire-fighting air respirator is used, high-pressure clean air filled in the air bottle is decompressed and then is supplied to a user for breathing, and the air respirator does not depend on ambient air completely. When the gas supply device is used, the gas supply valve assembly and the mask assembly are required to be connected in advance to be worn on a user, and the gas supply valve is required to be opened immediately after the gas supply valve assembly and the mask assembly are worn to consume compressed air in the gas cylinder. However, the compressed air in the cylinder is limited and if the supply valve assembly is prematurely connected to the mask assembly and worn, the compressed air is prematurely consumed, so that the available rescue time guaranteed by the compressed air will be correspondingly reduced. If the clothes are worn at a later time, the clothes do not meet the actual requirements, and precious rescue time is delayed. In addition, current positive pressure formula fire control air respirator is when using to connect the air feed valve assembly with the face guard assembly, and this connection operation is manual operation, needs the manual work of picking up the air feed valve assembly and installs on the face guard assembly in the operation process, and the connection process needs to occupy a hand and carries out manual operation, and this operation needs to occupy certain rescue time to if the user appears artificially nervous in mind, cause easily to connect not smoothly under the condition of bearing very big pressure in mind, influence rescue efficiency.
As mentioned above, it is the problem to be solved by the present invention to ensure that the valuable rescue time provided by compressed air can be used to the maximum extent possible while ensuring that the user is provided with breathing air at the first moment.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a mask bypass atmospheric device and a fire fighting air respirator.
The invention provides a mask atmosphere bypass device, which is characterized by comprising: the interface piece is provided with a relative inner side and an outer side, the inner side of the interface piece is provided with a first interface used for connecting the oral-nasal mask, and the outer side of the interface piece is respectively provided with a second interface used for connecting a compressed air supply device and a third interface used for communicating the external environment; the air valve unit is arranged at the position of the third interface and used for controlling the communication state of the third interface and the external environment; and the interface cover is matched with the interface piece and covered, and is provided with a first vent hole corresponding to the second interface and a second vent hole corresponding to the third interface.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: wherein, the pneumatic valve unit includes: the valve body assembly comprises a valve frame body arranged in the third interface and a pressing buckle matched and fixed at an outer side port of the valve frame body, and the pressing buckle is provided with a guide hole; the valve guide post penetrates through the guide hole, and two end parts of the valve guide post are respectively positioned at the outer side and the inner side of the press buckle; the valve plate component is sleeved and fixed at the end part of the valve guide post positioned at the inner side of the press buckle; the transmission assembly is connected with the end part of the valve guide post positioned at the outer side of the press buckle; the interface cover has a mounting cavity; the opening button is in a shaft shape, is arranged in the mounting cavity and extends into the inner side of the interface cover to be connected with the transmission assembly; when the opening button is pressed, the opening button drives the transmission assembly to move, the transmission assembly drives the valve guide post to move, the valve plate assembly moves along with the valve guide post, and the second vent hole is communicated with the third interface.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: the valve frame body is provided with a guide groove, the position of the guide groove corresponds to that of the guide hole, and the tail end of the valve guide post, which is positioned on the inner side of the press buckle, is inserted into the guide groove and is in sliding connection with the guide groove.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: the end part of the valve guide post, which is positioned at the inner side of the press buckle, is provided with a first flange, and the radial sectional area of the first flange is larger than that of the guide hole; the valve plate assembly comprises a pressing structure for installing the membrane and a colloid membrane installed in the installation frame body; the pressing sheet structure is provided with a limiting clamping groove hole matched with the first flange, and the first flange is clamped with the limiting clamping groove hole in a matching mode, so that the pressing sheet structure and the valve guide pillar form axial fixed connection.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: wherein, the interface lid has two installation cavities that are bilateral symmetry and set up, and the opening button is two, installs respectively in two installation cavities, and transmission assembly includes: the valve guide pillar comprises two first rotating shafts, two swing rods, two second rotating shafts and a limiting frame, wherein the two first rotating shafts are respectively connected to the two opening buttons, one ends of the two swing rods are respectively in rotatable connection with the two first rotating shafts, the other ends of the two swing rods are respectively in rotatable connection with the two second rotating shafts, the limiting frame is connected with the two second rotating shafts, a first through hole of the limiting frame is formed in the limiting frame, a second flange is arranged at the end part, located on the outer side of the press buckle, of the valve guide pillar, the radial sectional area of the second flange is larger than that of the first through hole of the limiting frame.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: at least one guide rod is fixed on the inner side of the interface cover at a position corresponding to the third interface, the tail end of the guide rod is fixedly connected with the pressing buckle, at least one second through hole of the limiting frame is further formed in the limiting frame, and the limiting frame is matched with the guide rod through the through hole to form sliding connection.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: wherein, every opening button has all seted up spacing recess along circumference, and the interface lid has all seted up spacing logical groove on the shell that corresponds two installation cavities, and the interface is covered and is provided with the subassembly that prevents to reset, should prevent that the subassembly that resets includes: two third pivots and spacing swing arm, the third pivot is connected on the interface lid, and spacing swing arm is "Contraband" font and two tip of spacing swing arm respectively with two third pivot rotatable coupling, and after opening the button and being pressed, spacing recess is corresponding with spacing logical groove position, and spacing swing arm is through with spacing recess phase-match block for opening the button rigidity in order to prevent to reset.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: wherein, still be provided with the subassembly that resets on the interface lid, this subassembly that resets includes: the fourth pivot, reset button, torsion spring and fifth pivot, the fourth pivot is connected on the interface lid, torsion spring overlaps the periphery of establishing in the fourth pivot, reset button is "C" font and reset button is connected respectively with two tip of fourth pivot, spacing swing arm constitutes rotatable coupling through fifth pivot and reset button, after reset button is pressed, reset button rotates around the fourth pivot, drive spacing swing arm and rotate around the fifth pivot, make spacing swing arm break away from spacing recess in order to reset.
In the mask atmosphere bypass device provided by the invention, the mask atmosphere bypass device also has the following characteristics: wherein, a first reset spring is arranged in the mounting cavity and sleeved on the periphery of the opening button; and a second return spring is sleeved on the valve guide post between the press buckle and the valve plate assembly.
The invention also provides a fire-fighting air respirator, which is characterized by comprising: the mask assembly comprises an oral-nasal mask, the mask bypass atmosphere device is fixed on the mask assembly and is connected with the oral-nasal mask through a first interface, and the compressed air supply device is connected with a second interface of the mask bypass atmosphere device through an air supply valve.
The invention has the following functions and effects:
in the mask bypass atmosphere device, the interface piece is simultaneously provided with the second interface used for connecting the compressed air supply device and the third interface used for communicating the external environment, and the communication state air valve unit used for controlling the third interface and the external environment is arranged at the position of the third interface. And the opening of the third interface can be quickly realized by pressing the opening button in the air valve unit by one key, so that the external environment is switched on, and a user can breathe by using the external environment air. And the closing of the third interface can be quickly realized by pressing the reset button in the air valve unit by one key, so that the third interface is not communicated with the external environment any more, and the user can breathe by using the air provided by the compressed air supply source.
The compressed air supply device in the fire-fighting air respirator is connected with the mask bypass atmospheric device in advance, the temporary connection in the field is not needed, a user can wear the whole fire-fighting air respirator before entering the rescue site, the ambient atmosphere can be used for breathing firstly, the air valve unit is closed by one key when entering the rescue site, the compressed air supply source is used for breathing, and the air valve unit can be opened by one key after escaping from the rescue site, so that the ambient atmosphere is used for breathing. The key controls the mutual switching between the ambient atmosphere and the compressed air, so that the precious compressed air source is reasonably utilized to the maximum extent, the rescue efficiency is improved, and the rescue time is more sufficient.
Furthermore, the two fingers press each other when the opening button is opened, so that the operation is convenient, and the risk that the air valve unit is opened to be communicated with the atmosphere due to unilateral friction on the rescue site so that a user inhales harmful gas by mistake is effectively avoided.
In addition, in the fire-fighting air respirator of the invention, the mask atmosphere bypass device is detachably fixed on the mask assembly, so that the mask atmosphere bypass device can be independently detached and independently cleaned or replaced after being used. Compared with the situation that the mask and the air supply valve assembly need to be integrally replaced to cause resource waste, the mask and the air supply valve assembly effectively save resources and are more environment-friendly.
Drawings
FIG. 1 is a schematic perspective view of a mask bypass atmospheric device in an embodiment of the present invention (with the gas valve unit open);
FIG. 2 is a schematic front perspective view of a mask bypass atmospheric device in an embodiment of the invention (with the air valve unit closed);
FIG. 3 is a schematic reverse perspective view of a mask bypass atmospheric device in an embodiment of the invention (with the air valve unit closed);
FIG. 4 is a top view of a mask bypass atmospheric device (with the air valve unit open) in an embodiment of the invention;
FIG. 5 is a cross-sectional view of FIG. 4 at section A-A;
FIG. 6 is a cross-sectional view of FIG. 4 at section B-B;
FIG. 7 is a top view of a mask bypass atmospheric device (with the valve unit closed) in an embodiment of the invention;
FIG. 8 is a cross-sectional view of FIG. 7 at section C-C;
FIG. 9 is a cross-sectional view of FIG. 7 at section D-D;
fig. 10 is a perspective view of an interface cover in an embodiment of the invention;
FIG. 11 is a schematic perspective view of an interface and a gas valve unit according to an embodiment of the invention (with the gas valve unit in an open state);
FIG. 12 is a side view of an interface and gas valve unit (gas valve unit open) in an embodiment of the invention;
FIG. 13 is a top view of the interface and gas valve unit (with the gas valve unit open) in an embodiment of the invention;
FIG. 14 is a schematic perspective view of an interface member and a gas valve unit according to an embodiment of the invention (with the gas valve unit in a closed state);
FIG. 15 is a side view of the interface and gas valve unit (gas valve unit closed) in an embodiment of the invention;
FIG. 16 is a top view of the interface and gas valve unit (in the gas valve unit closed state) in an embodiment of the invention;
FIG. 17 is a schematic view of a mask bypass atmospheric device mounted on a mask assembly in an embodiment of the invention.
Detailed Description
In order to make the technical means, the original characteristics, the achieved objects and the effects of the present invention easily understood, the mask atmosphere bypass device and the fire-fighting air respirator of the present invention will be described in detail with reference to the following embodiments.
< example >
As shown in fig. 1, the present embodiment provides a mask-bypassing atmosphere device 100, including: interface piece 10, gas valve unit 20, interface lid 30.
As shown in fig. 5 and 12, the mask bypass atmospheric device 100 has opposite inner (corresponding to the oronasal side of the human body) and outer (corresponding to the external environment). As shown in fig. 11 to 12, a first port 11 for connecting an oronasal mask is provided on the inner side of the mouthpiece 10, and a second port 12 for connecting a compressed air supply device and a third port 13 for communicating with the external environment are provided on the outer side of the mouthpiece 10.
As shown in fig. 1, the interface cover 30 is mated with the interface 10. As shown in fig. 10, the interface cover 30 further has two mounting cavities 33 symmetrically disposed in the left and right direction, and the housing corresponding to the two mounting cavities 33 is provided with a limiting through slot 331.
As shown in fig. 5 and 12, the gas valve unit 20 is disposed at the position of the third port 13, and the gas valve unit 20 is used for controlling the communication state of the third port 20 with the external environment. The gas valve unit 20 includes: valve body subassembly, valve guide pillar, valve block subassembly, transmission assembly, opening button prevent reset assembly, first reset spring and second reset spring.
As shown in fig. 3, 5 and 12, the valve body assembly includes a valve frame body 211 and a press buckle 212. The valve frame 211 has a cylindrical portion 211c, the valve frame 211 is inserted into the third port 13 as shown in fig. 5, and a sealing ring 213 is disposed between an inner wall of the third port 13 and the valve frame 211. As shown in fig. 5 and 6, the press button 212 is fixed to the outer end of the valve holder body 211, and a guide hole 212a is formed in the center of the press button 212. The valve housing body 211 further has a holder 211a and a guide groove 211 b. The guide groove 211b is provided at a central position inside the cylinder portion 211c corresponding to the position of the guide hole 212 a. The quantity of support 211a is 3, and guide way 211b and barrel part 211c are connected to support 211a, and the contained angle that becomes between the adjacent support is 120, and such setting makes stable in structure, plays stable support to guide way 211 b.
As shown in fig. 5 and 6, the valve guide post 22 has a cylindrical shape, the valve guide post 22 passes through the guide hole 212a, and both ends of the valve guide post 22 are located outside and inside the press button, respectively. The end of the valve guide post 22 located inside the press button 212 is provided with a first flange 221, the radial cross-sectional area of the first flange 221 is larger than that of the guide hole 212a, and the end of the valve guide post 22 on the side is inserted into the guide groove 211b to be slidably coupled with the guide groove. The valve guide post 22 is provided with a second flange 222 at the end located outside the press stud 212.
As shown in fig. 8 and 9, the valve plate assembly is sleeved and fixed on the end of the valve guide post 22 inside the press button. The valve plate assembly includes a sheeting structure 231 for mounting the diaphragm and a gel diaphragm 232. The pressing structure 231 has a limiting slot hole matched with the first flange 221, and the first flange 221 of the valve guide post 22 is matched and clamped with the limiting slot hole, so that the pressing structure 231 and the valve guide post 22 form an axial fixed connection. The pressure structure 231 is in an arc shape, the colloid membrane 232 is installed in the installation frame 231, the arc shape of the valve plate assembly is matched with the outer end port of the cylinder part 211c of the valve frame 211, and the outer end port of the valve frame 211 is covered when the air valve unit is closed, so that the third port 13 cannot be communicated with the external environment.
As shown in fig. 2 and 9, the opening buttons 25 are in the shape of a shaft, and two in number are respectively installed in two installation cavities of the mouthpiece cover 30 and extend into the inside of the mouthpiece cover 30. Each opening button 25 is circumferentially provided with a limit groove 251.
As shown in fig. 8 and 9, the transmission assembly is connected to the end of the valve guide post 22 located outside the press button. The transmission assembly includes: two first rotating shafts 241, two swing rods 242, two second rotating shafts 243 and a limiting frame 244. The two first rotating shafts 241 are connected to the two opening buttons 25, respectively. One ends of the two swing rods 242 are rotatably connected to the two first rotating shafts 241, respectively. The two second rotating shafts 243 are rotatably connected to the other ends of the two swing rods 242, respectively. The limiting frame 244 is connected to the two second rotating shafts 243, and the limiting frame 244 is provided with a first through hole 244 a. The radial cross-sectional area of the second flange 222 of the valve guide post 22 is larger than the radial cross-sectional area of the first through hole 244a of the limiting frame, and the valve guide post 22 forms a limiting connection with the limiting frame 244 through the second flange 222, that is, the valve guide post 22 and the limiting frame 244 can move relatively in the axial direction, and when the limiting frame 244 moves outwards, the valve guide post 22 is driven to move therewith.
As shown in fig. 8, two guide rods 245 are fixed on the inner side of the interface cover 30 at positions corresponding to the third interface 13, the two guide rods 245 are distributed above and below the valve guide post 22, and the ends of the guide rods 245 are fixedly connected with the press buckle 22. The position-limiting frame 224 is provided with two position-limiting frame second through holes 244b, the two guide rods 245 are respectively inserted into the two position-limiting frame second through holes 244b, and the position-limiting frame 224 is matched with the guide rods 224 through the position-limiting frame second through holes 244b to form sliding connection.
As shown in fig. 1, 2, 4, and 7, the interface cover 30 is provided with a reset prevention assembly, which includes: two third rotating shafts 261 and a limit swing arm 262. The interface cover 30 is provided with two perforated protrusions for mounting the third rotating shaft 26 in bilateral symmetry, and the third rotating shaft 262 is connected to the interface cover 30 through the perforated protrusions. The limit swing arm 262 is shaped like Contraband, and two ends of the limit swing arm 262 are rotatably connected to the two third rotating shafts 261 respectively.
As shown in fig. 1, 2, 5, and 8, the interface cover 30 is further provided with a reset assembly, which includes: a fourth rotating shaft 271, a reset button 272, a torsion spring 273, and a fifth rotating shaft 274. The interface cover 30 is provided with two perforated protrusions for installing the fourth rotating shaft 271 in a bilateral symmetry manner, and the fourth rotating shaft 271 is connected to the interface cover through the perforated protrusions. The torsion spring 273 is disposed around the fourth shaft 271. The reset button 272 has a C-shape, and the reset button 272 is connected to both ends of the fourth shaft 271. The limit swing arm 262 is provided with two perforated bulges, the limit swing arm 262 is connected with the fifth rotating shaft 274 through the two perforated bulges, the reset button 272 is respectively connected with the two end parts of the fifth rotating shaft 274, and thus the limit swing arm 262 is rotatably connected with the reset button 272 through the fifth rotating shaft 274.
As shown in fig. 9, the first return spring 28 is disposed in each of the two mounting cavities of the mouthpiece cover 30, and the first return spring 28 is sleeved on the outer periphery of the opening button 25. The valve guide post 22 is sleeved with a second return spring 29 between the press buckle 212 and the colloid membrane 232, one end of the second return spring 29 is correspondingly clamped in the annular groove of the press buckle 212, and the other end of the second return spring 29 is correspondingly clamped on the periphery of the annular bulge formed by the colloid membrane 232.
As shown in fig. 17, the present embodiment also provides a fire fighting air respirator 1, including: a mask assembly 200, a mask bypass atmospheric device 100, and a compressed air supply device (not shown). The mask assembly 200 includes an oronasal mask 201. The mask bypass atmospheric device 100 is attached to the mask assembly 200 and is connected to the oronasal mask 201 via the first port 11 of the mouthpiece 10. The compressed air supply device includes an air bottle storing compressed air, a pressure reducing device, an air supply pipeline, an air supply valve, etc., and the air supply valve of the compressed air supply device is connected with the second port 12 of the port member 10 of the mask bypass atmosphere device 100. The compressed air supply device is connected with the mask bypass atmosphere device in advance, but the air supply valve is not opened.
The working principle of the mask bypass atmosphere device 100 and the fire-fighting air respirator 1 of the embodiment is as follows:
(1) open mask bypass atmospheric device 100 air valve unit (in communication with external environment):
FIGS. 1, 4 to 6, and 11 to 13 show the open state of the air valve unit. The user presses the left and right open buttons 25 simultaneously with his fingers to open.
When the opening button 25 is pressed, the swing rod 242 is driven by the first rotating shaft 241 to move upward (i.e., move outward) as shown in fig. 6, the limiting frame 244 is driven by the second rotating shaft 243 to move upward (i.e., move outward), the limiting frame 244 drives the valve guide post 22 to move upward (i.e., move outward), the valve plate assembly composed of the pressing structure 231 and the colloid membrane 232 moves upward (i.e., move outward) along with the valve guide post 22, so that the colloid membrane 232 is far away from the combining position on the valve frame body 211, the second vent hole is communicated with the third port, and at this time, the second vent hole is communicated with the external environment, and external environment air can enter the inner side of the mask atmosphere.
After the opening button 25 is pressed, the position of the limiting groove 251 on the opening button 25 corresponds to the position of the limiting through groove 331 on the interface cover 30, and the reset button 272 drives the limiting swing arm 262 to rotate around the third rotating shaft 261 through the fifth rotating shaft 274 under the action of the torsion spring 273, so that the limiting swing arm 262 is matched and clamped with the limiting through groove 331 and the limiting groove 251, and the position of the opening button 25 is fixed to prevent resetting (i.e., prevent the air valve unit from being closed).
(2) Closing the mask by-pass atmospheric device 100 air valve unit (not in communication with the outside environment):
FIGS. 2 to 3, 7 to 9, and 14 to 16 show the closed state of the air valve unit. The user presses the reset button 273 one-click to close.
When the reset button 273 is pressed, the reset button 273 rotates around the fourth rotating shaft 271 to drive the limiting swing arm 262 to rotate around the fifth rotating shaft 274, so that the limiting swing arm 262 is separated from the limiting groove 251 on the open button 25 to be reset. At this time, the opening button 25 moves and resets under the action of the first return spring 28, and at the same time, the valve guide post 22 moves and resets downwards (i.e. moves inwards) as shown in fig. 9 under the action of the second return spring 29, and the valve plate assembly composed of the tablet structure 231 and the colloid membrane 232 moves downwards (i.e. moves inwards) along with the valve guide post 22 and returns to the joint position of the colloid membrane 232 and the valve frame body 211 to realize self-sealing, so that the inside (the mouth and nose side of the human body) is isolated from the external environment, and the external environment air does not enter the mask bypass atmosphere device 100 any more. When the external environment air is isolated, the air supply valve is opened, and the compressed air supply device is normally used for supplying air.
The compressed air supply device in the fire-fighting air respirator 1 in the embodiment is connected with the mask bypass atmosphere device in advance, and does not need to enter the temporary connection on the spot, a user can wear the whole fire-fighting air respirator 1 before entering the rescue site, the user can still use the ambient atmosphere for breathing after wearing the respirator, the air valve unit is closed by one key when entering the rescue site, the compressed air supply device provides breathing, and the air valve unit can be opened by one key after escaping from the rescue site, and the ambient atmosphere is reused for breathing. The key controls the mutual switching between the ambient atmosphere and the compressed air, so that the precious compressed air source is reasonably utilized to the maximum extent, the rescue efficiency is improved, and the rescue time is more sufficient.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A mask bypass atmospheric device, comprising:
the interface piece is provided with a relative inner side and an outer side, the inner side of the interface piece is provided with a first interface used for connecting the oral-nasal mask, and the outer side of the interface piece is respectively provided with a second interface used for connecting a compressed air supply device and a third interface used for communicating the external environment;
the air valve unit is arranged at the position of the third interface and used for controlling the communication state of the third interface and the external environment; and
the interface cover is matched and covered with the interface piece and is provided with a first vent hole corresponding to the second interface and a second vent hole corresponding to the third interface.
2. The mask bypass atmospheric device of claim 1, wherein:
wherein, the pneumatic valve unit includes: a valve body component, a valve guide post, a valve plate component, a transmission component and an opening button,
the valve body assembly comprises a valve frame body arranged in the third interface and a pressing buckle matched and fixed on an outer side port of the valve frame body, and the pressing buckle is provided with a guide hole;
the valve guide post penetrates through the guide hole, and two end parts of the valve guide post are respectively positioned on the outer side and the inner side of the press buckle;
the valve plate assembly is sleeved and fixed at the end part of the valve guide column positioned at the inner side of the press buckle;
the transmission assembly is connected with the end part of the valve guide post positioned at the outer side of the press buckle;
the interface cover has a mounting cavity;
the opening button is in a shaft shape, is arranged in the mounting cavity, and extends into the inner side of the interface cover to be connected with the transmission assembly;
when the opening button is pressed, the opening button drives the transmission assembly to act, the transmission assembly drives the valve guide post to move, the valve plate assembly moves along with the valve guide post, and therefore the second vent hole is communicated with the third interface.
3. The mask bypass atmospheric device of claim 2, wherein:
wherein the valve frame body is provided with a guide groove, the position of the guide groove corresponds to that of the guide hole,
the tail end of the valve guide post, which is positioned at the inner side of the press buckle, is inserted into the guide groove and is in sliding connection with the guide groove.
4. The mask bypass atmospheric device of claim 2, wherein:
the end part of the valve guide post, which is positioned at the inner side of the press buckle, is provided with a first flange, and the radial sectional area of the first flange is larger than that of the guide hole;
the valve plate assembly comprises a pressing structure for installing a membrane and a colloid membrane installed in the installation frame body;
the pressing sheet structure is provided with a limiting clamping groove hole matched with the first flange, and the first flange is matched and clamped with the limiting clamping groove hole, so that the pressing sheet structure and the valve guide post form axial fixed connection.
5. The mask bypass atmospheric device of claim 2, wherein:
wherein the interface cover is provided with two mounting cavities which are arranged in a left-right symmetry manner,
the number of the opening buttons is two, the opening buttons are respectively arranged in the two installation cavities,
the transmission assembly includes: two first rotating shafts respectively connected with the two opening buttons, two swing rods with one ends respectively rotatably connected with the two first rotating shafts, two second rotating shafts respectively rotatably connected with the other ends of the two swing rods, and a limiting frame connected with the two second rotating shafts, wherein the limiting frame is provided with a first through hole of the limiting frame,
the valve guide pillar is provided with a second flange at the end part positioned on the outer side of the press buckle, the radial sectional area of the second flange is larger than that of the first through hole of the limiting frame, and the valve guide pillar is in limiting connection with the limiting frame through the second flange.
6. The mask atmosphere bypass device according to claim 5, wherein:
wherein, at least one guide rod is fixed on the inner side of the interface cover at the position corresponding to the third interface, the tail end of the guide rod is fixedly connected with the press buckle,
the limiting frame is further provided with at least one limiting frame second through hole, and the limiting frame is matched with the guide rod through the through hole to form sliding connection.
7. The mask atmosphere bypass device according to claim 5, wherein:
wherein each opening button is provided with a limit groove along the circumferential direction,
the interface cover is provided with a limit through groove on the shell corresponding to the two mounting cavities,
be provided with on the interface lid and prevent the subassembly that resets, should prevent that the subassembly that resets includes: two third rotating shafts and a limit swing arm, wherein the third rotating shafts are connected to the interface cover, the limit swing arm is shaped like Contraband, two end parts of the limit swing arm are respectively rotatably connected with the two third rotating shafts,
when the opening button is pressed, the limiting groove corresponds to the limiting through groove in position, and the limiting swing arm is clamped with the limiting groove in a matched mode, so that the opening button is fixed in position to prevent resetting.
8. The mask bypass atmospheric device of claim 7, wherein:
wherein, still be provided with the subassembly that resets on the interface lid, this subassembly that resets includes: a fourth rotating shaft, a reset button, a torsion spring and a fifth rotating shaft,
the fourth rotating shaft is connected to the interface cover, the torsion spring is sleeved on the periphery of the fourth rotating shaft, the reset button is C-shaped and is respectively connected with two end parts of the fourth rotating shaft,
the limit swing arm is rotatably connected with the reset button through the fifth rotating shaft,
when the reset button is pressed, the reset button rotates around the fourth rotating shaft to drive the limiting swing arm to rotate around the fifth rotating shaft, so that the limiting swing arm is separated from the limiting groove to reset.
9. The mask bypass atmospheric device of claim 8, wherein:
the installation cavity is internally provided with a first reset spring, and the first reset spring is sleeved on the periphery of the opening button;
and a second return spring is sleeved between the press buckle and the valve plate assembly by the valve guide column.
10. A fire-fighting air respirator, comprising:
a mask assembly, a mask bypass atmosphere device and a compressed air supply device,
wherein the mask assembly comprises an oronasal mask,
the mask atmosphere bypass device is the mask atmosphere bypass device as claimed in any one of claims 1 to 9,
the mask bypass atmosphere device is fixed on the mask assembly and is connected with the oronasal mask through a first interface,
and the compressed air supply device is connected with a second interface of the mask bypass atmosphere device through an air supply valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107549.XA CN110694191A (en) | 2019-11-13 | 2019-11-13 | Mask bypass atmosphere device and fire-fighting air respirator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911107549.XA CN110694191A (en) | 2019-11-13 | 2019-11-13 | Mask bypass atmosphere device and fire-fighting air respirator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110694191A true CN110694191A (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911107549.XA Pending CN110694191A (en) | 2019-11-13 | 2019-11-13 | Mask bypass atmosphere device and fire-fighting air respirator |
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| Country | Link |
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| CN (1) | CN110694191A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112604197A (en) * | 2020-12-24 | 2021-04-06 | 北京京盾消防设备工程有限公司 | Air respirator for fire control |
| CN114432608A (en) * | 2021-12-30 | 2022-05-06 | 南京正泽科技股份有限公司 | Air-breathing gas supply valve with bypass and forced exhaust functions and use method thereof |
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