CN112370674A - Positive pressure type air respirator for fire fighting - Google Patents
Positive pressure type air respirator for fire fighting Download PDFInfo
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- CN112370674A CN112370674A CN202011220197.1A CN202011220197A CN112370674A CN 112370674 A CN112370674 A CN 112370674A CN 202011220197 A CN202011220197 A CN 202011220197A CN 112370674 A CN112370674 A CN 112370674A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
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Abstract
The invention relates to the field of fire fighting breathing equipment, and discloses a positive pressure type air respirator for fire fighting. This positive pressure formula air respirator is used in fire control, through the structural design of location bobbin and elastic rubber membrane in the low pressure cavity, and make the pressure regulating pipe of location bobbin switch-on high pressure cavity one side, oxygen pressure in the vertical high pressure cavity of oxygen cylinder is unstable, high-pressure oxygen flows into in the location bobbin, and make elastic rubber membrane bounce downwards, and drive the valve rod, the case moves down, make the pressure in the low pressure cavity obtain reducing, the state of recovering balance, thereby when need not the oxygen increase in the high pressure cavity, carry out the exhaust pressure release, cause the extravagant problem of oxygen, air respirator's live time has been improved.
Description
Technical Field
The invention relates to the field of fire-fighting breathing equipment, in particular to a positive pressure type air respirator for fire fighting.
Background
The positive pressure air respirator is a self-contained open fire-fighting air respirator commonly used in the field of fire fighting, so that a fireman or rescue personnel can safely carry out fire extinguishing, rescue and relief work and rescue work under the severe environment of being filled with dense smoke, toxic gas, steam or oxygen deficiency.
However, in the existing positive pressure air respirator, the pressure reducer is when using, when oxygen cylinder oxygen supply pressure changes, namely the pressure of the high pressure cavity in the pressure reducer increases, open the pressure relief mechanism automatically, carry out the pressure relief, cause the extravagant problem of oxygen, the live time of air respirator has been reduced, inconvenient fire control staff works for a long time, and when the high-pressure gas atmospheric pressure of oxygen supply is unstable, can not automatically regulated realize that the decompression is steady, lead to the atmospheric pressure after the oxygen decompression unstable, influence fire fighter's use.
Disclosure of Invention
The invention provides a positive pressure type air respirator for fire fighting, which has the advantages of convenience for long-time use of fire fighters and no influence on use experience, and solves the technical problems mentioned in the background technology.
In order to achieve the above purpose, the invention provides the following technical scheme to realize: a positive pressure air respirator for fire fighting comprises a pressure reducer body, a high pressure cavity, an air groove and a low pressure cavity are arranged inside the pressure reducer body, the high pressure cavity and the low pressure cavity are communicated through the air groove, a leading-in groove communicated with the high pressure cavity is formed in the pressure reducer body, an oxygen input pipe is fixedly sleeved on the leading-in groove, one end of the oxygen input pipe is communicated with an oxygen bottle, a leading-out groove communicated with the low pressure cavity is formed in the pressure reducer body, an oxygen output pipe is fixedly sleeved on the leading-out groove, one end of the oxygen output pipe is communicated with an oxygen mask, a pressure regulating pipe is fixedly connected to the side surface of the pressure reducer body, a lower exhaust groove is formed in the pressure reducer body, the high pressure cavity is communicated with an inner cavity of the pressure regulating pipe through the lower exhaust groove, a passive piston is movably sleeved in the inner, the low-pressure regulator comprises a pressure reducer body, a passive piston and a pressure regulating pipe are arranged in the pressure reducer body, a valve rod is fixedly connected to the middle of the bottom end of the passive piston, a valve core capable of plugging a vent groove is fixedly connected to the bottom end of the valve rod, a positioning barrel pipe located below the passive piston is fixedly sleeved in the low-pressure cavity, an elastic rubber film is arranged at the bottom of the positioning barrel pipe, a positioning film sleeve is fixedly sleeved in the middle of the elastic rubber film, the positioning film sleeve is fixedly sleeved with the valve rod, the positioning barrel pipe is movably sleeved with the valve rod, a vent hole is formed in the side face of the positioning barrel pipe, an upper air inlet groove located at.
Optionally, a limiting plate is fixedly sleeved on one side inside the pressure regulating pipe, a pushing shaft is movably sleeved in the middle of the limiting plate, a sealing plate is fixedly connected to one end of the pushing shaft, the sealing plate is movably sleeved on the inner wall of the pressure regulating pipe, the outer edge of the sealing plate is completely attached to the inner wall of the pressure regulating pipe, the diameter of the sealing plate is larger than that of the lower exhaust groove, one end of the gas conduit is located on one side of the sealing plate, a positioning spring movably sleeved on the pushing shaft is arranged between the sealing plate and the limiting plate, a pressure relief hole is formed in the bottom of the pressure regulating pipe, and the pressure relief hole is located between the gas conduit and the limiting.
Optionally, one end of the push shaft, which is far away from the sealing plate, is fixedly connected with a support sliding plate, which is located on the other side of the limiting plate, the outer side of the support sliding plate is completely attached to the inner wall of the pressure regulating pipe, and the support sliding plate is movably sleeved with the pressure regulating pipe.
Optionally, the pressure regulating device includes adjusting screw, adjusting screw thread suit is on the apron at pressure reducer body top, and adjusting screw's bottom swing joint has the removal piston that is located the low pressure cavity, it cup joints with the low pressure cavity activity to remove the piston, and is equipped with spacing spring between the bottom of low pressure cavity and the top of passive piston, adjusting screw's top fixedly connected with is located the outside rotor plate of pressure reducer body.
Optionally, the diameter of the inner cavity below the low-pressure chamber is smaller than that of the inner cavity above the low-pressure chamber, the positioning bobbin is fixedly installed at the bottom of the inner cavity above the low-pressure chamber, the total length value of the valve element and the valve rod is greater than the length value of the bottom of the inner cavity of the passive piston and the low-pressure chamber, the middle of the top end of the positioning bobbin is fixedly sleeved with the limiting sleeve, the limiting sleeve is movably sleeved with the valve rod, and the bottom of the limiting sleeve is movably connected with the top of the positioning film sleeve.
The invention provides a positive pressure type air respirator for fire fighting, which has the following beneficial effects:
1. this positive pressure air respirator is used in fire control, through the structural design of location bobbin and elastic rubber membrane in the low pressure cavity, and make the pressure regulating pipe of location bobbin switch-on high pressure cavity one side, when the oxygen pressure in the vertical high pressure cavity of oxygen cylinder is unstable, during the pressure increase of oxygen suppliment, high-pressure oxygen flows in the location bobbin, and make elastic rubber membrane bounce down, and drive the valve rod, the case moves down, make the pressure in the low pressure cavity obtain reducing, resume balanced state, thereby need not when the oxygen increases in the high pressure cavity, exhaust the pressure release, cause the extravagant problem of oxygen, the live time of air respirator has been improved, so that the fire fighter carries out work for a long time.
2. The positive pressure type air respirator for fire fighting has the advantages that through the structural design that the inner cavity of the positioning barrel, the inner cavity of the pressure regulating pipe and the high-pressure chamber can be communicated, when the air pressure in the high-pressure chamber is unstable, the high-pressure chamber and the positioning barrel are communicated by utilizing the increase of the air pressure in the high-pressure chamber, so that automatic balance is realized, and the stable delivery of oxygen is ensured.
3. This positive pressure air respirator is used in fire control, when oxygen pressure increases in high-pressure chamber, utilize the pressure regulating pipe with the high-pressure chamber switch-on, the location bobbin, utilize high-pressure oxygen in the high-pressure chamber to make elastic rubber membrane drive the valve rod and move down, when realizing the state of automatic recovery balance, when oxygen pressure in high-pressure chamber lasts the increase by force, and during unable automatic recovery, make the closing plate continue to move to the right, open the space of next air duct and pressure release hole, thereby automatic exhaust decompression, ensure the normal air feed of oxygen cylinder.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1B according to the present invention.
In the figure: 1. a pressure reducer body; 101. a high pressure chamber; 102. a low pressure chamber; 103. a lead-in groove; 104. a lead-out slot; 105. a lower exhaust duct; 106. an upper air inlet groove; 107. a vent channel; 2. a pressure regulating device; 201. adjusting the screw rod; 202. moving the piston; 203. a rotating plate; 204. a limiting spring; 3. an oxygen input tube; 4. an oxygen output pipe; 5. a valve core; 6. positioning the bobbin; 601. a vent hole; 602. an elastic rubber film; 603. positioning the membrane sleeve; 604. a limiting sleeve; 7. a pressure regulating pipe; 701. a limiting plate; 702. a pressure relief vent; 8. pushing the shaft; 9. a sealing plate; 10. a gas conduit; 11. supporting the sliding plate; 12. a positioning spring; 13. a passive piston; 14. a valve stem.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a positive pressure air respirator for fire fighting comprises a pressure reducer body 1, a high pressure chamber 101, a vent groove 107 and a low pressure chamber 102 are arranged inside the pressure reducer body 1, the high pressure chamber 101 and the low pressure chamber 102 are communicated through the vent groove 107, a lead-in groove 103 communicated with the high pressure chamber 101 is arranged on the pressure reducer body 1, an oxygen input pipe 3 is fixedly sleeved on the lead-in groove 103, one end of the oxygen input pipe 3 is communicated with an oxygen bottle, a lead-out groove 104 communicated with the low pressure chamber 102 is arranged on the pressure reducer body 1, an oxygen output pipe 4 is fixedly sleeved on the lead-out groove 104, one end of the oxygen output pipe 4 is communicated with an oxygen mask, a pressure regulating pipe 7 is fixedly connected to the side surface of the pressure reducer body 1, a lower exhaust groove 105 is arranged on the pressure reducer body 1, the high pressure chamber 101 is communicated with, a passive piston 13 is movably sleeved in an inner cavity of the low-pressure chamber 102, a pressure regulating device 2 is arranged at the top of the passive piston 13, a valve rod 14 is fixedly connected to the middle of the bottom end of the passive piston 13, a valve core 5 capable of plugging the vent groove 107 is fixedly connected to the bottom end of the valve rod 14, a positioning barrel 6 positioned below the passive piston 13 is fixedly sleeved in the low-pressure chamber 102, an elastic rubber film 602 is arranged at the bottom of the positioning barrel 6, a positioning film sleeve 603 is fixedly sleeved at the middle of the elastic rubber film 602, the positioning film sleeve 603 is fixedly sleeved with the valve rod 14, the positioning barrel 6 is movably sleeved with the valve rod 14, a vent hole 601 is formed in the side surface of the positioning barrel 6, an upper air inlet groove 106 positioned at the vent hole 601 is formed in the pressure reducer body 1, an air guide pipe 10 is communicated between the upper air inlet groove 106 and the pressure regulating pipe 7, when in use, the pressure, The leading-in groove 103 enters the high-pressure chamber 101 in the pressure reducer body 1, the valve core 5 is jacked up by high-pressure oxygen, the pressure of the oxygen entering the low-pressure chamber 102 is reduced under the action of the downward force of the pressure regulating device 2 on the valve core 5, the reduced-pressure oxygen flows to the breathing mask through the leading-out groove 104 and the oxygen output pipe 4, when the oxygen pressure in the oxygen bottle vertical high-pressure chamber 101 is unstable, the pressure of the oxygen is increased, the valve core 5 is integrally moved upwards, the oxygen pressure in the low-pressure chamber 102 is increased, at the moment, the high-pressure oxygen enters the pressure regulating pipe 7 and flows into the positioning barrel 6 through the gas conduit 10, the pressure in the inner space of the positioning barrel 6 and the elastic rubber film 602 is increased, the elastic rubber film 602 is bounced downwards, the valve rod 14 and the valve core 5 are driven to move downwards, the pressure in the low-pressure chamber 102 is reduced, the balanced state is recovered, and the oxygen does not need, carry out the pressure release of exhausting, cause the extravagant problem of oxygen, improved air respirator's live time to fire fighter works for a long time, and, when can also be unstable in high-pressure chamber 101, utilize the increase of high-pressure chamber 101 internal gas pressure, switch-on high-pressure chamber 101 and location bobbin 6, thereby realize automatic balance, ensure the stable transport of oxygen.
Wherein, a limiting plate 701 is fixedly sleeved on one side inside the pressure regulating pipe 7, a pushing shaft 8 is movably sleeved on the middle part of the limiting plate 701, a sealing plate 9 is fixedly connected with one end of the pushing shaft 8, the sealing plate 9 is movably sleeved with the inner wall of the pressure regulating pipe 7, the outer edge of the sealing plate 9 is completely attached to the inner wall of the pressure regulating pipe 7, the diameter of the sealing plate 9 is larger than that of the lower exhaust groove 105, one end of the gas conduit 10 is positioned on one side of the sealing plate 9, a positioning spring 12 movably sleeved on the pushing shaft 8 is arranged between the sealing plate 9 and the limiting plate 701, a pressure relief hole 702 is arranged at the bottom of the pressure regulating pipe 7, the pressure relief hole 702 is positioned between the gas conduit 10 and the limiting plate 701, when the oxygen pressure in the high-pressure chamber 101 is increased, the oxygen pressure in the low-pressure chamber 102 is increased while the valve core 5 is moved upwards, the sealing plate 9 is moved to the right, the high pressure oxygen in the high pressure chamber 101 enters into the positioning bobbin 6 through the lower exhaust groove 105, the gas conduit 10 and the upper intake groove 106, so that the elastic rubber film 602 drives the valve rod 14 to move downwards, the gap between the valve core 5 and the vent groove 107 is reduced, the oxygen in the low pressure chamber 102 is reduced, and the balanced state is recovered, therefore, when the oxygen in the high pressure chamber 101 is increased, the problem of oxygen waste is solved by exhausting and pressure relief, when the pressure in the high pressure chamber 101 is recovered, the sealing plate 9 moves to the left to seal the lower exhaust groove 105, and simultaneously the high pressure gas in the inner cavity of the positioning bobbin 6 is exhausted through the gas conduit 10 and the pressure relief hole 702, the state before the problem is recovered, the maintenance is not needed again, the trouble of fire fighting and chemical engineering personnel when using the air respirator to work is avoided, and when the oxygen pressure in the high pressure chamber 101 is continuously increased and cannot be automatically recovered, the sealing plate 9 continues to move to, the space of the lower exhaust groove 105 and the pressure relief hole 702 is opened, so that the air is automatically exhausted and decompressed, and the normal air supply of the oxygen cylinder is ensured.
Wherein, the one end fixedly connected with that the closing plate 9 is kept away from to the push shaft 8 is located the support slide 11 of limiting plate 701 opposite side, the outside of supporting slide 11 is laminated completely with the inner wall of pressure regulating pipe 7, and support slide 11 and pressure regulating pipe 7 activity and cup joint, utilize the removal of support slide 11 in pressure regulating pipe 7, make closing plate 9 remove more stably in pressure regulating pipe 7, thereby when having improved the increase of oxygen pressure in high pressure chamber 101, the stable removal of closing plate 9, limiting plate 701 is greater than the horizontal interval value of pressure release hole 702 and next air duct 105 with the interval value of pressure regulating pipe 7 lateral wall, ensure that closing plate 9 when oxygen pressure is too big in high pressure chamber 101, closing plate 9 can be under the effect of pressure in high pressure chamber 101, remove the one side of pressure release hole 702, thereby realize automatic exhaust, reduce the atmospheric pressure in high pressure chamber 101.
Wherein, pressure regulating device 2 includes adjusting screw 201, adjusting screw 201 thread suit is on the apron at 1 top of pressure reducer body, and adjusting screw 201's bottom swing joint has the removal piston 202 that is located low pressure chamber 102, remove piston 202 and low pressure chamber 102 activity and cup joint, and be equipped with spacing spring 204 between low pressure chamber 102's bottom and passive piston 13's the top, adjusting screw 201's top fixedly connected with is located the outside rotor plate 203 of pressure reducer body 1, it is rotatory to drive adjusting screw 201 through rotatory rotor plate 203, thereby adjust the interval of removing piston 202 and passive piston 13, and then adjust spacing spring 204's compression degree, so as to control the intensity of decompression.
Wherein, the diameter of the inner cavity below the low pressure chamber 102 is smaller than that of the inner cavity above the low pressure chamber, the positioning bobbin 6 is fixedly arranged at the bottom of the inner cavity above the low pressure chamber 102, the total length value of the valve core 5 and the valve rod 14 is larger than the length value of the bottom of the inner cavity of the passive piston 13 and the low pressure chamber 102, so as to ensure that the passive piston 13 can drive the valve rod 14 to move after the respirator is stopped, so that the valve core 5 is attached to the vent groove 107 for plugging, the middle part of the top end of the positioning bobbin 6 is fixedly sleeved with the limit sleeve 604, the limit sleeve 604 is movably sleeved with the valve rod 14, the bottom of the limit sleeve 604 is movably connected with the top of the positioning film sleeve 603, and under the normal working state, the passive piston 13 at the top of the valve rod 14 is only subjected to the downward elastic force of the limit spring 204, so that the valve core, can make elastic rubber membrane 602 arch down, drive valve rod 14, location membrane cover 603 and move down, improve the decompression effect, and utilize stop collar 604 to the spacing of valve rod 14 for reciprocating of valve rod 14 is stable.
When the oxygen pressure regulator is used, the rotating plate 203 is rotated by a wire to enable the adjusting screw rod 201 to rotate, the degree of compression of the limiting spring 204 by the movable piston 202 is adjusted, so that the decompression strength is controlled, then high-pressure oxygen output from an oxygen bottle enters the high-pressure chamber 101 in the pressure reducer body 1 from the oxygen input pipe 3 and the introduction groove 103, the high-pressure oxygen jacks up the valve core 5, the oxygen entering the low-pressure chamber 102 is decompressed under the downward force action of the pressure regulator 2 on the valve core 5, the decompressed oxygen flows to the breathing mask through the guide groove 104 and the oxygen output pipe 4, when the oxygen pressure in the high-pressure chamber 101 in the vertical direction of the oxygen bottle is increased, the oxygen supply pressure is increased, so that the valve core 5 integrally moves upwards, the oxygen pressure in the low-pressure chamber 102 is increased, at the moment, the high-pressure oxygen enters the pressure regulating pipe 7 and flows into the positioning barrel 6 through the gas conduit, The pressure in the internal space of the elastic rubber film 602 is increased, so that the elastic rubber film 602 bounces downward and drives the valve rod 14 and the valve core 5 to move downward, so that the pressure in the low-pressure chamber 102 is reduced and the balance state is restored.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a fire control is with positive pressure air respirator, including pressure reducer body (1), the inside of pressure reducer body (1) is equipped with high-pressure chamber (101), air channel (107) and low pressure chamber (102), and high-pressure chamber (101) and low pressure chamber (102) are put through air channel (107), offer on pressure reducer body (1) with communicating lead-in groove (103) of high-pressure chamber (101), the fixed cover has been connected oxygen input tube (3) on lead-in groove (103), the one end and the oxygen bottle switch-on of oxygen input tube (3), offer on pressure reducer body (1) with communicating derivation groove (104) of low pressure chamber (102), the fixed cover has been connected oxygen output tube (4) on derivation groove (104), the one end and the oxygen mask switch-on of oxygen output tube (4), its characterized in that: the side fixedly connected with pressure regulating pipe (7) of pressure reducer body (1), seted up lower exhaust groove (105) on pressure reducer body (1), high-pressure chamber (101) are put through mutually with the inner chamber of pressure regulating pipe (7) through lower exhaust groove (105), the inner chamber movable sleeve of low pressure chamber (102) is equipped with passive piston (13), the top of passive piston (13) is equipped with pressure regulating device (2), the middle part fixedly connected with valve rod (14) of passive piston (13) bottom, the case (5) of bottom fixedly connected with shutoff air channel (107) of valve rod (14), low pressure chamber (102) internal fixation cover is equipped with location bobbin (6) that are located passive piston (13) below, the bottom of location bobbin (6) is equipped with elastic rubber membrane (602), the middle part of elastic rubber membrane (602) is fixed to have cup jointed location membrane cover (603), the positioning film sleeve (603) is fixedly sleeved with the valve rod (14), the positioning bobbin (6) is movably sleeved with the valve rod (14), the side face of the positioning bobbin (6) is provided with a vent hole (601), the pressure reducer body (1) is provided with an upper air inlet groove (106) located at the vent hole (601), and an air guide pipe (10) is communicated between the upper air inlet groove (106) and the pressure regulating pipe (7).
2. A positive pressure air respirator for fire fighting as defined in claim 1, wherein: the pressure regulating pipe is characterized in that a limiting plate (701) is fixedly sleeved on one side inside the pressure regulating pipe (7), a pushing shaft (8) is movably sleeved in the middle of the limiting plate (701), a sealing plate (9) is fixedly connected to one end of the pushing shaft (8), the sealing plate (9) is movably sleeved with the inner wall of the pressure regulating pipe (7), the outer edge of the sealing plate (9) is completely attached to the inner wall of the pressure regulating pipe (7), the diameter of the sealing plate (9) is larger than that of the lower exhaust groove (105), one end of a gas guide pipe (10) is located on one side of the sealing plate (9), a positioning spring (12) movably sleeved on the pushing shaft (8) is arranged between the sealing plate (9) and the limiting plate (701), a pressure relief hole (702) is formed in the bottom of the pressure regulating pipe (7), and the pressure relief hole (702) is located between the gas guide pipe (10).
3. A positive pressure type air respirator for fire fighting as claimed in claim 2, characterized in that: one end, far away from the sealing plate (9), of the push shaft (8) is fixedly connected with a supporting sliding plate (11) located on the other side of the limiting plate (701), the outer side of the supporting sliding plate (11) is completely attached to the inner wall of the pressure regulating pipe (7), and the supporting sliding plate (11) is movably sleeved with the pressure regulating pipe (7).
4. A positive pressure air respirator for fire fighting as defined in claim 1, wherein: pressure regulating device (2) are including adjusting screw (201), adjusting screw (201) screw thread suit is on the apron at pressure reducer body (1) top, and the bottom swing joint of adjusting screw (201) has removal piston (202) that is located low pressure chamber (102), remove piston (202) and low pressure chamber (102) activity and cup joint, and be equipped with between the bottom of low pressure chamber (102) and the top of passive piston (13) spacing spring (204), the top fixedly connected with of adjusting screw (201) is located outside rotor plate (203) of pressure reducer body (1).
5. A positive pressure air respirator for fire fighting as defined in claim 1, wherein: the diameter of an inner cavity below the low-pressure chamber (102) is smaller than that of an inner cavity above the low-pressure chamber, the positioning bobbin (6) is fixedly installed at the bottom of the inner cavity above the low-pressure chamber (102), the total length value of the valve core (5) and the valve rod (14) is larger than the length value of the bottom of the inner cavity of the passive piston (13) and the low-pressure chamber (102), the middle of the top end of the positioning bobbin (6) is fixedly sleeved with the limiting sleeve (604), the limiting sleeve (604) is movably sleeved with the valve rod (14), and the bottom of the limiting sleeve (604) is movably connected with the top of the positioning film sleeve (603).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011220197.1A CN112370674B (en) | 2020-11-05 | 2020-11-05 | Positive pressure type air respirator for fire fighting |
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| CN202011220197.1A CN112370674B (en) | 2020-11-05 | 2020-11-05 | Positive pressure type air respirator for fire fighting |
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| CN112370674B CN112370674B (en) | 2022-01-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115227999A (en) * | 2022-07-07 | 2022-10-25 | 浙江中辰城市应急服务管理有限公司 | Multiple filtered smoke mask of washing gas |
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| CN108969922A (en) * | 2018-08-17 | 2018-12-11 | 上海宝亚安全装备股份有限公司 | A kind of respirator pressure reducer alarm whistle device |
| CN208823830U (en) * | 2018-08-30 | 2019-05-07 | 芬安工贸(上海)有限公司 | Using diaphragm substrate as the steam supply valve of positive pressure lever in a kind of novel medium voltage by-pass structure |
| CN209679339U (en) * | 2019-01-24 | 2019-11-26 | 上海宝亚安全装备股份有限公司 | Positive-pressure type respirator pressure reducer with adjustment cap |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115227999A (en) * | 2022-07-07 | 2022-10-25 | 浙江中辰城市应急服务管理有限公司 | Multiple filtered smoke mask of washing gas |
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