CN218356968U - Novel positive pressure type fire-fighting respirator - Google Patents
Novel positive pressure type fire-fighting respirator Download PDFInfo
- Publication number
- CN218356968U CN218356968U CN202220798337.1U CN202220798337U CN218356968U CN 218356968 U CN218356968 U CN 218356968U CN 202220798337 U CN202220798337 U CN 202220798337U CN 218356968 U CN218356968 U CN 218356968U
- Authority
- CN
- China
- Prior art keywords
- air
- plate
- respirator
- positive pressure
- connecting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of fire rescue equipment technique and specifically relates to a novel positive pressure formula fire control respirator. The utility model discloses a novel positive pressure type fire control respirator's respirator body includes fixing device and air feeder, and air feeder and fixing device's lower bottom surface fixed connection, and air feeder's lower bottom surface is equipped with a plurality of air inlet interface, and air inlet interface is connected with high-pressure gas pitcher through the trachea, and air feeder's right-hand member is equipped with the interface of giving vent to anger, and the high-pressure gas pitcher that corresponds is independently controlled through a plurality of air inlet interface supplies air to air feeder, and the quantity of the high-pressure gas pitcher of convenient to use personnel nimble adjustment promotes the suitability; the vertical adjustment tank of seting up in middle part at the connecting plate back, the upper surface of going up the regulating plate sets up the regulating block, and the front of connecting plate is equipped with the accommodate the lead screw with the adjustment tank plug-in connection, goes up the regulating plate and is connected with the connecting plate through accommodate the lead screw, through the height between accommodate the lead screw control upper adjusting plate and the bottom plate, makes things convenient for the installation of not co-altitude high-pressure gas pitcher, promotes the suitability.
Description
Technical Field
The utility model belongs to the technical field of fire rescue equipment technique and specifically relates to a novel positive pressure formula fire control respirator.
Background
The positive pressure type fire-fighting air respirator is a self-contained open fire-fighting air respirator, the used compressed air is stored in a self-contained air storage tank, the air supply mode is positive pressure type, namely when a person wears the respirator to breathe, the whole breathing system is always isolated from the outside, the internal pressure is higher than the pressure of the external environment, and the external toxic and harmful gas cannot enter the inside of the breathing system in the breathing process, so that safe and reliable breathing protection is ensured, and the fire fighter or the person in danger can safely extinguish a fire or evacuate an accident site in a severe environment filled with dense smoke, toxic gas, steam or oxygen deficiency.
The traditional positive pressure air respirator mainly comprises components such as a high-pressure air tank, a pressure reducer, an air guide pipe, an alarm whistle pressure gauge, an air supply valve, a back plate, a strap and a face mask, wherein the weight of the whole respirator is about 8.5 kg-17 kg according to the specification of the high-pressure air tank, and the weight of the high-pressure air tank accounts for the main weight and is generally half or more of that of self-contained equipment.
Most of positive pressure fire control air respirator on the market is equipped with a high-pressure gas pitcher for when long distance rescue or withdraw danger zone, move ahead on a load basis to the user of service, physical stamina consumption is great, and the bulk weight is heavy moreover, and to women especially children, it is inconvenient to use ten sides, and the backplate structure singleness of fixed high-pressure gas pitcher simultaneously can not be used for the installation of the high-pressure gas pitcher of multiple different height specifications, and the suitability is not strong.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problem that exists among the above-mentioned background art, provide a novel positive pressure fire control respirator, solve the most high-pressure gas pitcher that is equipped with of positive pressure fire control air respirator on the market, be used for long distance rescue or withdraw the dangerous zone time, it moves ahead to be equivalent to bearing a burden to the user, physical consumption is great, and whole weight is heavy moreover, to women especially children, it is inconvenient to use ten sides, the backplate single structure of fixed high-pressure gas pitcher simultaneously, can not be used for the installation of the high-pressure gas pitcher of multiple different height specifications, the not strong problem of suitability.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a novel positive pressure formula fire control respirator, includes respirator body, a plurality of ready-packaged joint and high-pressure gas pitcher, the respirator body include fixing device and air feeder, a plurality of installing ports that run through to the surperficial are seted up to fixing device's lower bottom surface, high-pressure gas pitcher be connected with fixing device through the installing port, air feeder and fixing device's lower bottom surface fixed connection, air feeder's lower bottom surface is provided with a plurality of interfaces that admit air, the interface that admits air be connected with high-pressure gas pitcher through the trachea, air feeder's right-hand member is provided with the interface of giving vent to anger.
Fixing device include regulating plate, bottom plate and with bottom plate upper surface body coupling's connecting plate, the vertical adjustment tank of having seted up in the middle part at the connecting plate back, the upper surface of going up the regulating plate is provided with the regulating block that matches with the adjustment tank, the upper surface of regulating block sets up threaded hole, the front of connecting plate is provided with the accommodate the lead screw of being connected with the adjustment tank plug-in connection, last regulating plate be connected with the connecting plate through accommodate the lead screw.
The guide sliding grooves are formed in the two ends of the upper surface of the upper adjusting plate, guide sliding rails matched with the guide sliding grooves are arranged on the upper surface of the connecting plate, and the upper adjusting plate is connected with the guide sliding rails in a sliding mode through the guide sliding grooves.
Go up the both sides of regulating plate and all be provided with first fixed knot, the both sides of connecting plate all are provided with the fixed knot of second, it all is provided with the fixed band to go up the fixed knot of the left first fixed knot of regulating plate and the left second of connecting plate and detain.
The fixing device is characterized in that adhesive cloth is arranged on the outer surface, close to the fixed end, of the fixing belt, buckling cloth is arranged on the outer surface of the movable end of the fixing belt, braces are arranged at two ends of the front face of the connecting plate, and buckles for adjusting the lengths of the braces are arranged in the middle of the braces.
The lower open face department of installing port is provided with spacing net, the upper open face of spacing net and the lower fixed surface of bottom plate are connected, the opening that is used for high-pressure gas pitcher to give vent to anger the interface and passes through is seted up to the bottom of spacing net.
The air supply device comprises an air supply pipe and a plurality of connecting pipes connected with the lower annular pipe orifice of the air supply pipe, wherein the air supply pipe is fixedly connected with the lower bottom surfaces of the supports at the two ends of the air supply pipe and the lower supporting plate.
The air inlet interface comprises an air valve and an air inlet pipe, the upper end of the air valve is fixedly connected with the lower opening of the connecting pipe, the lower opening of the air valve is fixedly connected with the upper opening of the air inlet pipe, and the high-pressure air tank is connected with the lower opening pipe opening of the air inlet pipe through a quick connector at the tail end of the air pipe.
The lower ring surface of the air supply pipe is provided with a pressure gauge connected with the pipe orifice.
And a rotating handle is arranged at the top end of the adjusting screw rod, and the tail end of the adjusting screw rod is rotatably connected with the inner bottom surface of the adjusting groove.
The beneficial effects of the utility model are that:
(1) The utility model discloses a novel positive pressure type fire control respirator body includes fixing device and air feeder, and air feeder is connected with the lower bottom surface of fixing device fixedly, and the lower bottom surface of air feeder is provided with a plurality of air inlet interfaces, and the air inlet interface is connected with the high-pressure gas pitcher through the trachea, and the right-hand member of air feeder is provided with the interface of giving vent to anger, and the high-pressure gas pitcher that corresponds is independently controlled through a plurality of air inlet interfaces supplies air for the air feeder, makes things convenient for the user to adjust the quantity of high-pressure gas pitcher in a flexible way, promotes the suitability;
(2) The vertical adjustment tank of seting up in middle part at the connecting plate back, the upper surface of going up the regulating plate sets up the regulating block, and the front of connecting plate is provided with the accommodate the lead screw with the adjustment tank plug-in connection, goes up the regulating plate and is connected with the connecting plate through accommodate the lead screw, through the height between accommodate the lead screw control upper adjusting plate and the bottom plate, makes things convenient for the installation of not co-altitude high-pressure gas pitcher, further promotes the suitability.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a front view of the present invention.
Fig. 2 is a perspective view of the respirator body of the present invention.
Fig. 3 is a plan view of the present invention.
In the drawing, 1, a fixing device, 2, an air supply device, 3, a mounting port, 4, an air inlet port, 5, an air outlet port, 6, a high-pressure air tank, 7, an upper adjusting plate, 8, a lower supporting plate, 9, a connecting plate, 10, an adjusting groove, 11, an adjusting block, 12, an adjusting screw rod, 13, a guide sliding groove, 14, a guide sliding rail, 15, a first fixing buckle, 16, a second fixing buckle, 17, a fixing belt, 18, bonding cloth, 19, fastening cloth, 20, a back strap, 21, a limiting net, 22, an air supply pipe, 23, a connecting pipe, 24, an air valve, 25, an air inlet pipe, 26, a pressure gauge and 27 are provided with a rotating handle.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
Fig. 1, a novel positive pressure type fire control respirator that fig. 2 and fig. 3 show, including the respirator body, a plurality of ready-packaged joint and high-pressure gas pitcher 6, the respirator body includes fixing device 1 and air feeder 2, a plurality of installing ports 3 that run through to the upper surface are seted up to fixing device 1's lower bottom surface, high-pressure gas pitcher 6 is connected with fixing device 1 through installing port 3, air feeder 2 and fixing device 1's lower bottom surface fixed connection, air feeder 2's lower bottom surface is provided with a plurality of interfaces 4 that admit air, interface 4 that admit air is connected with high-pressure gas pitcher 6 through the trachea, air feeder 2's right-hand member is provided with interface 5 of giving vent to anger, high-pressure gas pitcher 6 that corresponds through a plurality of interfaces 4 independent control that admit air supplies air for air feeder 2 air, make things convenient for the nimble quantity of adjusting high-pressure gas pitcher 6 of user, promote the suitability.
When the rescue device is used for long-distance rescue, the used high-pressure gas tank 6 can be discarded, so that the load of search and rescue personnel is reduced, and when a woman or a child with low strength withdraws in danger and uses the fire-fighting respirator, the number of the high-pressure gas tanks can be reduced, and the situation that the survival probability of the user is reduced due to exhaustion is avoided.
Further, in order to facilitate the respirator to install the high-pressure gas tanks 6 of different heights, the practicability is improved, the fixing device 1 comprises an upper adjusting plate 7, a lower supporting plate 8 and a connecting plate 9 integrally connected with the upper surface of the lower supporting plate 8, an adjusting groove 10 is vertically formed in the middle of the back of the connecting plate 9, the upper surface of the upper adjusting plate 7 is provided with an adjusting block 11 matched with the adjusting groove 10, a threaded hole is formed in the upper surface of the adjusting block 11, the front surface of the connecting plate 9 is provided with an adjusting screw rod 12 connected with the adjusting groove 10 in an inserting mode, the adjusting block 11 is in threaded connection with the adjusting screw rod 12, and the upper adjusting plate 7 is connected with the connecting plate 9 through the adjusting screw rod 12.
As shown in fig. 2, according to the height of the high pressure gas tank 6, the adjusting screw rod 12 is rotated, the adjusting block 11 moves upwards or downwards along the thread direction of the adjusting block 11, the adjusting block 11 drives the upper adjusting plate 7 to ascend or descend simultaneously, the distance between the upper groove surface of the adjusting groove 10 and the upper surface of the connecting plate 9 is half of the height of the upper adjusting plate 7, when the upper surface of the adjusting block 11 is attached to the upper groove surface of the adjusting groove 10, the upper surface of the upper adjusting plate 7 is flush with the upper surface of the connecting plate 9, the distance between the lower groove surface of the adjusting groove 10 and the upper surface of the lower support plate 8 is also half of the height of the upper adjusting plate 7, and when the lower bottom surface of the adjusting block 11 is attached to the lower groove surface of the adjusting groove 10, the lower bottom surface of the upper adjusting plate 7 is attached to the upper surface of the lower support plate 8.
Further, in order to facilitate the lifting adjustment of the upper adjusting plate 7, as shown in fig. 2 or fig. 3, guide sliding grooves 13 are respectively formed at two ends of the upper surface of the upper adjusting plate 7, a guide sliding rail 14 matched with the guide sliding grooves 13 is arranged on the upper surface of the connecting plate 9, and the upper adjusting plate 7 is slidably connected with the guide sliding rail 14 through the guide sliding grooves 13.
Further, in order to facilitate the fixation of the high-pressure gas tank 6 and facilitate the use, both sides of the upper adjusting plate 7 are provided with first fixing buckles 15, both sides of the connecting plate 9 are provided with second fixing buckles 16, both the first fixing buckles 15 on the left side of the upper adjusting plate 7 and the second fixing buckles 16 on the left side of the connecting plate 9 are provided with fixing bands 17, the outer surfaces, close to the fixed ends, of the fixing bands 17 are provided with bonding cloth 18, the outer surfaces of the movable ends of the fixing bands 17 are provided with buckling cloth 19, both ends of the front surface of the connecting plate 9 are provided with straps 20, the middle of each strap 20 is provided with a buckle for adjusting the length of each strap 20, the straps 20 are fixed firmly when in use, a transverse reinforcing band can be arranged at the upper ends of the buckles of the straps 20, and the middle of the reinforcing bands are connected by using the buckles.
As shown in fig. 2 or fig. 3, after the high pressure gas tank 6 is snapped into the corresponding mounting opening 3, the fixing strap 17 is laid along the outer circumferential surface of the high pressure gas tank 6, then the movable end of the fixing strap 17 is respectively threaded through the first fixing buckle 15 and the second fixing buckle 16 at the corresponding positions on the right side, and laid in the opposite direction after being tightened, so that the fastening cloth 19 is adhered to the adhesive cloth 18, and the high pressure gas tank 6 is fixed.
Further, for better fixed high-pressure gas tank 6, the lower open face department of installing port 3 is provided with spacing net 21, and the upper open face of spacing net 21 is connected with the lower fixed surface of bottom plate 8, and the opening that is used for high-pressure gas tank 6 interface of giving vent to anger to pass through is seted up to the bottom of spacing net 21.
Further, in order to facilitate the sequential supply of gas to the gas supply device 2 by the plurality of high pressure gas tanks 6, the gas supply device 2 includes a gas supply pipe 22 and a plurality of connection pipes 23 connected to a lower circumferential pipe opening of the gas supply pipe 22, and the gas supply pipe 22 is fixedly connected to a lower bottom surface of the lower supporting plate 8 through brackets disposed at two ends of the gas supply pipe 22.
Further, in order to avoid the tightness of the gas supply device 2 after the high-pressure gas tank 6 is disassembled, the gas inlet interface 4 comprises a gas valve 24 and a gas inlet pipe 25, the upper end of the gas valve 24 is fixedly connected with the lower opening of the connecting pipe 23, the lower opening of the gas valve 24 is fixedly connected with the upper opening of the gas inlet pipe 25, and the high-pressure gas tank 6 is connected with the lower opening pipe opening of the gas inlet pipe 25 through a quick coupler at the tail end of a gas pipe.
As shown in fig. 1, when the high pressure gas in one of the high pressure gas tanks 6 is used up, the gas valve 24 is screwed, the gas supply path of the connection pipe 23 connected to the gas supply pipe 22 is closed, and then the quick connector between the tail end of the gas pipe of the high pressure gas tank 6 and the lower opening of the gas inlet pipe 25 is pulled out, so that the corresponding high pressure gas tank 6 can be disassembled
Further, in order to facilitate the detection of the tightness of the whole fire-fighting respirator before use, the lower annular surface of the air supply pipe 22 is provided with a pressure gauge 26 connected with a nozzle.
Further, in order to facilitate the operation of the adjusting screw 12, a rotating handle 27 is provided at the top end of the adjusting screw 12, and the end of the adjusting screw 12 is rotatably connected to the inner bottom surface of the adjusting groove 10.
The utility model discloses a novel positive pressure type fire control respirator's respirator body includes fixing device 1 and air feeder 2, air feeder 2 is connected with the lower bottom surface fixed connection of fixing device 1, the lower bottom surface of air feeder 2 is provided with a plurality of air inlet interface 4, air inlet interface 4 is connected with high-pressure gas pitcher 6 through the trachea, the right-hand member of air feeder 2 is provided with the interface of giving vent to anger, high-pressure gas pitcher 6 through a plurality of air inlet interface 4 independent control correspondences supplies gas for air feeder 2, make things convenient for the user to adjust the quantity of high-pressure gas pitcher 6 in a flexible way, promote the suitability; the vertical adjustment tank 10 of seting up in middle part at the connecting plate 9 back, the upper surface of going up regulating plate 7 sets up regulating block 11, and the front of connecting plate 9 is provided with accommodate the lead screw 12 with adjustment tank 10 plug-in connection, goes up regulating plate 7 and is connected with connecting plate 9 through accommodate the lead screw 12, goes up the height between regulating plate 7 and the bottom plate 8 through accommodate the lead screw 12 control, makes things convenient for the installation of not co-altitude high pressure gas pitcher 6, further promotes the suitability.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a novel positive pressure formula fire control respirator, includes respirator body, a plurality of ready-packaged joint and high-pressure gas pitcher (6), characterized by: the respirator body include fixing device (1) and air feeder (2), a plurality of installing ports (3) that run through to the upper surface are seted up to the lower bottom surface of fixing device (1), high-pressure gas pitcher (6) be connected with fixing device (1) through installing ports (3), the lower bottom surface fixed connection of air feeder (2) and fixing device (1), the lower bottom surface of air feeder (2) is provided with a plurality of interfaces of admitting air (4), interface of admitting air (4) be connected with high-pressure gas pitcher (6) through the trachea, the right-hand member of air feeder (2) is provided with interface of giving vent to anger (5).
2. The novel positive pressure fire fighting respirator of claim 1, characterized in that: fixing device (1) including last regulating plate (7), bottom plate (8) and with bottom plate (8) upper surface body coupling's connecting plate (9), adjustment tank (10) have been seted up vertically at the middle part at the connecting plate (9) back, the upper surface of going up regulating plate (7) is provided with and adjusts tank (10) assorted regulating block (11), the upper surface of regulating block (11) sets up threaded hole, the front of connecting plate (9) is provided with accommodate the lead screw (12) of being connected with adjustment tank (10) grafting, regulating block (11) and accommodate the lead screw (12) threaded connection, last regulating plate (7) be connected with connecting plate (9) through accommodate the lead screw (12).
3. The novel positive pressure fire fighting respirator of claim 2, characterized in that: guide sliding grooves (13) are formed in the two ends of the upper surface of the upper adjusting plate (7), guide sliding rails (14) matched with the guide sliding grooves (13) are arranged on the upper surface of the connecting plate (9), and the upper adjusting plate (7) is connected with the guide sliding rails (14) in a sliding mode through the guide sliding grooves (13).
4. The novel positive pressure fire fighting respirator of claim 2, characterized in that: go up the both sides of regulating plate (7) and all be provided with first fixed knot (15), the both sides of connecting plate (9) all are provided with the fixed knot of second (16), it all is provided with fixed band (17) on knot (16) to go up the fixed knot of left first fixed knot (15) of regulating plate (7) and the fixed knot of the left second of connecting plate (9).
5. The novel positive pressure fire fighting respirator of claim 4, wherein: the fixing device is characterized in that bonding cloth (18) is arranged on the outer surface, close to the fixed end, of the fixing belt (17), fastening cloth (19) is arranged on the outer surface of the movable end of the fixing belt (17), braces (20) are arranged at the two front ends of the connecting plate (9), and buckles for adjusting the length of the braces (20) are arranged in the middle of the braces (20).
6. The novel positive pressure fire fighting respirator of claim 2, wherein: the lower open face department of installing port (3) is provided with spacing net (21), the last open face of spacing net (21) and the lower fixed surface of bottom plate (8) are connected, the opening that is used for high-pressure gas pitcher (6) to give vent to anger the interface and passes through is seted up to the bottom of spacing net (21).
7. The novel positive pressure fire fighting respirator of claim 2, characterized in that: air feeder (2) including air supply pipe (22) and a plurality of and air supply pipe (22) connecting pipe (23) that the ring face mouth of pipe is connected down, air supply pipe (22) through setting up in the support at air supply pipe (22) both ends and the lower bottom surface fixed connection of bottom plate (8).
8. The novel positive pressure fire fighting respirator of claim 7, wherein: the air inlet connector (4) comprises an air valve (24) and an air inlet pipe (25), the upper end of the air valve (24) is fixedly connected with the lower opening of the connecting pipe (23), the lower opening of the air valve (24) is fixedly connected with the upper opening of the air inlet pipe (25), and the high-pressure air tank (6) is connected with the lower opening pipe opening of the air inlet pipe (25) through a quick connector at the tail end of an air pipe.
9. The novel positive pressure fire fighting respirator of claim 7, characterized in that: and a pressure gauge (26) connected with a pipe orifice is arranged on the lower annular surface of the air supply pipe (22).
10. The novel positive pressure fire fighting respirator of claim 2, wherein: the top end of the adjusting screw rod (12) is provided with a rotating handle (27), and the tail end of the adjusting screw rod (12) is rotatably connected with the inner bottom surface of the adjusting groove (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220798337.1U CN218356968U (en) | 2022-04-07 | 2022-04-07 | Novel positive pressure type fire-fighting respirator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220798337.1U CN218356968U (en) | 2022-04-07 | 2022-04-07 | Novel positive pressure type fire-fighting respirator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218356968U true CN218356968U (en) | 2023-01-24 |
Family
ID=84951543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220798337.1U Active CN218356968U (en) | 2022-04-07 | 2022-04-07 | Novel positive pressure type fire-fighting respirator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218356968U (en) |
-
2022
- 2022-04-07 CN CN202220798337.1U patent/CN218356968U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4449524A (en) | Self-contained breathing apparatus with provision for shared use | |
| CN110368232B (en) | Pressurizing cabin system for recycling oxygen | |
| US20090133730A1 (en) | System and method for sheltering individuals in a hazardous environment | |
| WO2008097569A1 (en) | Oxygen mask with rebreather bag for use with pulse oxygen delivery system | |
| CN218356968U (en) | Novel positive pressure type fire-fighting respirator | |
| CN107224685A (en) | High altitude bailout apparatus of oxygen supply | |
| CN209270529U (en) | A kind of division of respiratory disease atomization breathing equipment | |
| WO2010133843A2 (en) | Ventilator apparatus | |
| CN114344749B (en) | Intelligent induction type plateau vehicle-mounted oxygen supply device | |
| CN211752014U (en) | Multifunctional backpack fire extinguishing device | |
| CN112843405A (en) | Emergency department extrusion type auxiliary respirator | |
| CN217041125U (en) | Air supply device capable of maintaining air breathing requirement of firemen for long time | |
| CN210698433U (en) | Respirator for respiratory medicine | |
| CN220424407U (en) | Backpack foam fire extinguishing device | |
| CN219687593U (en) | Front hanging type diving breathing equipment | |
| CN208552793U (en) | A kind of severe medicine section respirator | |
| KR102603056B1 (en) | Apparatus for breathing underwater | |
| CN208838911U (en) | A kind of wearing stability, the higher air respiratorresuscitator of comfort level | |
| CN214807559U (en) | External respiratory lung | |
| CN219001613U (en) | Improved oxygen respirator | |
| CN218187569U (en) | Portable emergency oxygen respirator | |
| CN215231249U (en) | Cardiovascular respirator | |
| CN205549274U (en) | Portable simple respirator | |
| CN206560603U (en) | A kind of portable underground self-rescuer | |
| CN217489611U (en) | Backpack type efficient fire extinguishing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |