CN103656909B - Pressure oxygen mask big flow outlet valve - Google Patents
Pressure oxygen mask big flow outlet valve Download PDFInfo
- Publication number
- CN103656909B CN103656909B CN201310632094.XA CN201310632094A CN103656909B CN 103656909 B CN103656909 B CN 103656909B CN 201310632094 A CN201310632094 A CN 201310632094A CN 103656909 B CN103656909 B CN 103656909B
- Authority
- CN
- China
- Prior art keywords
- outlet valve
- spring
- pressure
- valve
- compensating diaphragm
- 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
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of pressure oxygen mask big flow outlet valve, including outlet valve seat, the valve edge of a knife and valve plate, face shield chamber, discharge chamber and overbottom pressure chamber it is provided with in described outlet valve seat, it is additionally provided with compensating diaphragm bottom described centre mount, described compensating diaphragm is close on the inwall in described overbottom pressure chamber, described overbottom pressure intracavity is additionally provided with pressing plate, the lower end of described compensating diaphragm is fixed on described pressing plate, being additionally provided with antagonism pressure passageway in described outlet valve seat, described antagonism pressure passageway connects described overbottom pressure chamber and air suction valve.Present invention eliminates independent pressure piping, the compensating diaphragm pressure of outlet valve is to draw from air suction valve at face shield intracavity, the pressure of suction muffler will introduce compensating diaphragm and create antagonism pressure, ensure pressure breathing, simplify face mask structure, alleviate face shield weight, reduce outlet valve total height, improve downward view, and reduce the face shield moment of torsion when high overload, improve the air-tightness of overload pressurization.
Description
Technical field
The present invention relates to oxygen mask, more particularly, it relates to a kind of big flow of pressure oxygen mask is exhaled and lived
Door.
Background technology
In order to meet the oxygen supply demand of pilot, the outlet valve in existing pressure oxygen mask has two to finish
Full different operating state: 1) normally for oxygen condition: below 18km height air-tightness passenger cabin and 12km with
During lower non-airtight cabin, it is ensured that the normal oxygen supply of pilot；2) emergency oxygen supply state: at 12km～
When 18km non-hermetically sealed passenger cabin or explosive decompression, in face shield, set up relevant pressure, it is ensured that pilot is continued
The pressure breathing oxygen of a period of time.
Outlet valve be every folding once, face shield chamber is just with extraneous break-make once.Outlet valve is in the middle of using
Work with pilot's synchronized with breath, often breathe an outlet valve with regard to cycle of operation once, therefore its work
Whether state is directly connected to whole face shield oxygen supply functional realiey.
The height dimension of existing outlet valve is bigger than normal so to be made outlet valve be arranged on face shield to protrude above face shield
Too high so that its whole face shield center of gravity is away from head center of gravity, and the face shield moment of torsion when high overload is excessive, easily leads
Cause overload bad stability.Existing outlet valve uses single pressure piping bleed to outlet valve cavity of resorption shape
Resistance to compression in pairs, causes whole face shield weight bigger than normal, affects the comfortableness that face shield is worn.Existing outlet valve is exhaled
Atmidometer is bigger than normal, causes pilot to wear face shield flight for a long time, is easily generated breathing fatigue, affects face shield and wear
Wear comfortableness.
Summary of the invention
The technical problem to be solved in the present invention is, it is provided that a kind of volume pressure oxygen mask little, lightweight
Big flow outlet valve.
The technical solution adopted for the present invention to solve the technical problems is: a kind of big stream of pressure oxygen mask of structure
Amount outlet valve, including outlet valve seat, the valve edge of a knife and valve plate, is provided with face in described outlet valve seat
Cover chamber, discharge chamber and overbottom pressure chamber, described outlet valve seat is provided with centre mount, described centre mount top and institute
State and between valve plate, be provided with the first spring, bottom described centre mount and between described outlet valve seat, be provided with second
Spring, is additionally provided with compensating diaphragm bottom described centre mount, described compensating diaphragm is close to the interior of described overbottom pressure chamber
On wall, described overbottom pressure intracavity is additionally provided with pressing plate, and the lower end of described compensating diaphragm is fixed on described pressing plate, institute
Being additionally provided with antagonism pressure passageway in stating outlet valve seat, described antagonism pressure passageway connects described overbottom pressure chamber and air-breathing is lived
Door.
In such scheme, during poised state when outlet valve is in normal oxygen supply, there is following balance:
F1=k1x1=Pp+m1g
F2=k2x2=Pp+m1g+mk1g+m2g+Ff
Wherein, F1、F2It is respectively the first spring and the elastic force of the second spring, PpFor pre-compression force, m1For
The quality of valve plate, mk1For the quality of spring the first spring, m2Centered by the quality of seat, FfFor compensating film
The resistance of sheet, k1、k2It is respectively the first spring and the rigidity of the second spring, x1、x2It is respectively the first spring
Compression distance with the second spring.
In such scheme, during poised state when outlet valve is in pressure breathing oxygen, there is following balance:
k2x2+P1=Pp+m1g+mk1g+m2g+Ff+k1x1+P2
P2=P*πd2/4
P1=P* π * (d2 2+d1d2+d1 2)/12
Wherein, PpFor pre-compression force, m1For the quality of valve plate, mk1It is the quality of the first spring, m2
Centered by the quality of seat, FfFor the resistance of compensating diaphragm, k1、k2It is respectively the first spring and the second spring
Rigidity, x1、x2It is respectively the first spring and the compression distance of the second spring, P1For by compensating diaphragm effect
Axial force on centre mount, P2For acting on the axial force of valve plate, P is pressure during pressure breathing oxygen,
D is valve edge of a knife diameter, d1For the hard central diameter of compensating diaphragm, d2For compensating diaphragm working diameter.
In such scheme, the rigidity of described first spring is 0.016-0.024N/m, and quality is 2.4-3.6g,
The rigidity of described second spring is 0.024-0.036N/m, and quality is 6.4-9.6g.
In such scheme, the thickness of described compensating diaphragm is 0.1-0.3mm.
In such scheme, the hard central diameter of compensating diaphragm described in described valve edge of a knife diameter d=15-21mm
d1=8-12mm, compensating diaphragm working diameter d2=6-10mm。
In such scheme, the exit of described antagonism pressure passageway is provided with adaptor, and described adaptor passes through interference
Coordinate and be crimped on described outlet valve seat.
In such scheme, described pressing plate is by fixing through the sunk screw of described outlet valve seat.
In such scheme, described second spring includes volute spring and cylindrical spring, described volute spring and institute
Stating centre mount to connect, described cylindrical spring is connected with described outlet valve seat.
In such scheme, in described outlet valve seat, it is additionally provided with the steel ball blocking fabrication hole, described steel ball and institute
State fabrication hole interference fit.
Implement the pressure oxygen mask big flow outlet valve of the present invention, have the advantages that
Present invention eliminates independent pressure piping, the compensating diaphragm pressure of outlet valve is from suction at face shield intracavity
Draw under gas valve, the pressure of suction muffler will introduce compensating diaphragm and create antagonism pressure, it is ensured that pressure breathing,
Simplify face mask structure, alleviate face shield weight, reduce outlet valve total height, improve downward view, and
And reduce the face shield moment of torsion when high overload, improve the air-tightness of overload pressurization.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of pressure oxygen mask of the present invention big flow outlet valve；
Poised state force simplified figure when Fig. 2 is outlet valve normal oxygen supply；
Poised state force simplified figure when Fig. 3 is outlet valve pressure breathing oxygen.
Detailed description of the invention
In order to be more clearly understood from the technical characteristic of the present invention, purpose and effect, now comparison accompanying drawing is detailed
Describe the detailed description of the invention of the bright present invention in detail.
As it is shown in figure 1, pressure oxygen mask of the present invention big flow outlet valve includes outlet valve seat 1, lives
The door edge of a knife 6 and valve plate 5.Face shield chamber 12, discharge chamber 13 and overbottom pressure chamber 14 it is provided with in outlet valve seat 1,
During expiration, valve plate 5 is opened, and gas is discharged from discharge chamber 13.Outlet valve seat 1 is provided with centre mount
4, it is provided with the first spring 9 between centre mount 4 top and valve plate 5, bottom centre mount 4 and outlet valve
It is provided with the second spring 8 between seat 1.Being additionally provided with compensating diaphragm 3 bottom centre mount 4, compensating diaphragm 3 is close to
On the inwall in overbottom pressure chamber 14, being additionally provided with pressing plate 2 in overbottom pressure chamber 14, the lower end of compensating diaphragm 3 is fixed on
On pressing plate 2, being additionally provided with antagonism pressure passageway in outlet valve seat 1, antagonism pressure passageway connects overbottom pressure chamber 14 He
Air suction valve.Compensating diaphragm 3 pressure of outlet valve is to draw from air suction valve in face shield chamber 12,
The pressure of suction muffler will introduce compensating diaphragm 3 and create antagonism pressure, it is ensured that pressure breathing.
There is following two equilibrium state in outlet valve of the present invention；
1, poised state during the normal oxygen supply of outlet valve；
The outlet valve stress balance state when normal oxygen supply, can be reduced to spring stress principle sketch, as
Shown in Fig. 2.During for calculated equilibrium state, spring and the stressing conditions of diaphragm, by valve plate 5, centre mount
4 and compensating diaphragm 3 all simplified, due to compensating diaphragm 3 in working order be mainly diaphragm generation material
Material deformation, what its deformation force can approximate is considered certain value, is therefore reduced to a resistance Ff,
The Resistance Value of compensating diaphragm 3 can be obtained by experiment.Therefore can approximate and obtain valve when normal oxygen supply
Stress balance formula:
F1=k1x1=Pp+m1g
F2=k2x2=Pp+m1g+mk1g+m2g+Ff
Wherein, F1、F2It is respectively the first spring 9 and the elastic force of the second spring 8, PpFor pre-compression force,
m1For the quality of valve plate 5, mk1For the quality of spring the first spring 9, m2Centered by the quality of seat 4,
FfFor the resistance of compensating diaphragm 3, k1、k2It is respectively the first spring 9 and the rigidity of the second spring 8, x1、
x2Being respectively the first spring 9 and compression distance of the second spring 8, k is the first spring 9 and the second spring 8
Global stiffness.
Owing to the first spring 9 and the second spring 8 use cascaded structure, therefore its global stiffness is:
k=k1k2/(k1+k2)
During for preventing from, in overbottom pressure chamber 14, negative pressure occurs, occur that centre mount 4 moves down and the valve plate 5 that causes
Situation about opening, needs when valve poised state, and the compression distance of the first spring 9 is more than H, to ensure
When centre mount 4 moves down into extreme lower position, remain to make valve plate 5 touch valve base after the first spring 9 elongation,
Ensure airtight to prevent outside air from entering in face shield chamber 12.
From above formula, as outlet valve resistance need to be reduced, can be by increasing the effective circulating face of valve
Long-pending realization, and increase valid circulation area, can be come by the open degree increasing the valve edge of a knife 6 diameter and valve
Realize, it is also possible on the premise of ensureing outlet valve air-tightness, reduce spring and compensating diaphragm 3 as far as possible
Pre-compression force PpAnd the global stiffness of spring, and reduce spring global stiffness can by reduce valve plate 5,
The resistance of centre mount 4 and the weight of the first spring 9 and compensating diaphragm 3 realizes, and reduces the resistance of diaphragm
Power can use the method such as thinning diaphragm thickness and reduction membrane tension to realize.
According to mentioned above principle, the rigidity of the present invention the first spring 9 is 0.016-0.024N/m, and quality is
2.4-3.6g, the rigidity of the second spring 8 is 0.024-0.036N/m, and quality is 6.4-9.6g, compensating diaphragm 3
Thickness be 0.1-0.3mm.In a preferred embodiment, the rigidity of the first spring 9 is 0.02N/m, quality
For 3g, the rigidity of the second spring 8 is 0.03N/m, and quality is 8g, and the thickness of compensating diaphragm 3 is 0.2mm.
2, poised state during outlet valve pressure breathing oxygen:
The outlet valve stress balance state when pressure breathing oxygen, can be reduced to spring stress principle sketch, as
Shown in Fig. 3.During for calculated equilibrium state, spring and the stressing conditions of diaphragm, by valve plate 5, centre mount
4 and compensating diaphragm 3 all use same method to be simplified, therefore can approximate obtain valve pressurization supply
Stress balance formula during oxygen:
k2x2+P1=Pp+m1g+mk1g+m2g+Ff+k1x1+P2
P2=P*πd2/4
Wherein, PpFor pre-compression force, m1For the quality of valve plate 5, mk1It is the quality of the first spring 9,
m2Centered by the quality of seat 4, FfFor the resistance of compensating diaphragm 3, k1、k2It is respectively the first spring 9 He
The rigidity of the second spring 8, x1、x2It is respectively the first spring 9 and the compression distance of the second spring 8, P2For
Acting on the axial force of valve plate 5, P is pressure during pressure breathing oxygen, and d is the valve edge of a knife 6 diameter, d1
For the hard central diameter of compensating diaphragm 3, d2For compensating diaphragm 3 working diameter.
Power is transmitted, because pressure is passing through film owing to diaphragm makes diaphragm produce dilatancy by pressure
Will necessarily produce certain power loss during sheet transmission concentration power, the pressure therefore acted on diaphragm is converted into collection
The ratio of middle power is referred to as the effective area of diaphragm.The effective diaphragm area formula of center power transmission is as follows:
F=π * (d2 2+d1d2+d1 2)/12
Wherein F is effective diaphragm area, d1For the hard central diameter of compensating diaphragm 3, d2For compensating diaphragm 3
Working diameter.
Axial force P on centre mount 4 is acted on by compensating diaphragm 31=P*F=P* π * (d2 2+d1d2+d1 2)
/12。
By above formula, diaphragm key parameter i.e. diaphragm working diameter and hard central diameter can be calculated (in i.e.
Heart seat 4 diameter) between relation, and understand under the conditions of pressure breathing oxygen, by iris action in center
The size of the axial force on seat 4.The design key parameter of compensating diaphragm 3 is understood by above formula.
Hard central diameter d of compensating diaphragm 3 in the present embodiment1=8-12mm, compensating diaphragm 3 working diameter
d2=6-10mm, the valve edge of a knife 6 diameter d=15-21mm, preferred d1=10mm, d2=8mm, d=18mm.
Outlet valve height can be made to be dropped by former height 38mm according to above-mentioned formula and selected parameters of operating part
Low to 19mm, protrude face shield height after installation and be reduced to 7mm by 28mm, so make valve center of gravity
Close proximity to face.This can make the center of gravity of face shield near head center of gravity, reduces the face shield torsion when high overload
Square, improves the air-tightness of overload pressurization.Owing to oxygen system cancels independent pressure piping, the benefit of outlet valve
Repay diaphragm 3 pressure be in face shield chamber 12 from air suction valve draw, will suction muffler pressure introduce mend
Repay diaphragm 3 to create antagonism pressure, it is ensured that pressure breathing, this design can simplify face mask structure, alleviate face shield weight
Amount.Outlet valve is optimized design makes expiratory resistance resistance under 60L/min be dropped by 0.32KPa
Low to about 0.15KPa.
Further, the exit of antagonism pressure passageway is provided with adaptor 7, and adaptor 7 is by interference fit pressure
It is connected on outlet valve seat 1.Adaptor 7 is for being connected with the suction muffler of air suction valve.Outlet valve seat 1
Inside it is additionally provided with the steel ball 10 blocking fabrication hole, steel ball 10 and fabrication hole interference fit.
Further, pressing plate 2 is fixed by the sunk screw 11 through outlet valve seat 1, the valve edge of a knife
6 are threaded connection with outlet valve seat 1.
Further, the second spring 8 includes volute spring and cylindrical spring, volute spring and centre mount 4
Connecting, cylindrical spring is connected with outlet valve seat 1.Volute spring is centrally positioned the outside of seat 4, cylinder
Spring is positioned inside pressing plate 2.When valve plate 5 is opened, cylindrical spring first deforms upon, valve plate 5
During closedown, volute spring first deforms upon, and the rigidity of volute spring, more than the rigidity of cylindrical spring, therefore may be used
To realize quickly opening and quick closedown of valve plate 5.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned
Detailed description of the invention, above-mentioned detailed description of the invention is only schematic rather than restrictive, this
The those of ordinary skill in field, under the enlightenment of the present invention, is being protected without departing from present inventive concept and claim
Under the ambit protected, it may also be made that a lot of form, within these belong to the protection of the present invention.
Claims (10)
1. a pressure oxygen mask big flow outlet valve, including outlet valve seat, the valve edge of a knife and work
Door-plate, is provided with face shield chamber, discharge chamber and overbottom pressure chamber in described outlet valve seat, it is characterised in that described in exhale
Gas valve base is provided with centre mount, is provided with the first spring, institute between described centre mount top and described valve plate
State bottom centre mount and be provided with the second spring between described outlet valve seat, bottom described centre mount, being additionally provided with benefit
Repaying diaphragm, described compensating diaphragm is close on the inwall in described overbottom pressure chamber, and described overbottom pressure intracavity is additionally provided with pressing plate,
The lower end of described compensating diaphragm is fixed on described pressing plate, is additionally provided with and leads to resistance to compression in described outlet valve seat
Road, described antagonism pressure passageway connects described overbottom pressure chamber and air suction valve.
Pressure oxygen mask the most according to claim 1 big flow outlet valve, it is characterised in that
During poised state when outlet valve is in normal oxygen supply, there is following balance:
F1=k1x1=Pp+m1g
F2=k2x2=Pp+m1g+mk1g+m2g+Ff
Wherein, F1、F2It is respectively the first spring and the elastic force of the second spring, PpFor pre-compression force, m1For
The quality of valve plate, mk1It is the quality of the first spring, m2Centered by the quality of seat, FfFor compensating diaphragm
Resistance, k1、k2It is respectively the first spring and the rigidity of the second spring, x1、x2It is respectively the first spring and the
The compression distance of two springs.
Pressure oxygen mask the most according to claim 2 big flow outlet valve, it is characterised in that
During poised state when outlet valve is in pressure breathing oxygen, there is following balance:
k2x2+P1=Pp+m1g+mk1g+m2g+Ff+k1x1+P2
P2=P* π d2/4
P1=P* π * (d2 2+d1d2+d1 2)/12
Wherein, PpFor pre-compression force, m1For the quality of valve plate, mk1It is the quality of the first spring, m2
Centered by the quality of seat, FfFor the resistance of compensating diaphragm, k1、k2It is respectively the first spring and the second spring
Rigidity, x1、x2It is respectively the first spring and the compression distance of the second spring, P1For by compensating diaphragm effect
Axial force on centre mount, P2For acting on the axial force of valve plate, P is pressure during pressure breathing oxygen,
D is valve edge of a knife diameter, d1Centered by seat diameter, d2For compensating diaphragm working diameter.
Pressure oxygen mask the most according to claim 3 big flow outlet valve, it is characterised in that
The rigidity of described first spring is 0.016-0.024N/m, and quality is 2.4-3.6g, described second spring firm
Degree is 0.024-0.036N/m, and quality is 6.4-9.6g.
Pressure oxygen mask the most according to claim 3 big flow outlet valve, it is characterised in that
The thickness of described compensating diaphragm is 0.1-0.3mm.
Pressure oxygen mask the most according to claim 3 big flow outlet valve, it is characterised in that
Described valve edge of a knife diameter d=15-21mm, described centre mount diameter d1=8-12mm, compensating diaphragm works
Diameter d2=6-10mm.
Pressure oxygen mask the most according to claim 1 big flow outlet valve, it is characterised in that
The exit of described antagonism pressure passageway is provided with adaptor, described adaptor by interference fit be crimped on described in exhale
On gas valve base.
Pressure oxygen mask the most according to claim 1 big flow outlet valve, it is characterised in that
Described pressing plate is by fixing through the sunk screw of described outlet valve seat.
Pressure oxygen mask the most according to claim 1 big flow outlet valve, it is characterised in that
Described second spring includes that volute spring and cylindrical spring, described volute spring are connected with described centre mount, institute
State cylindrical spring to be connected with described outlet valve seat.
Pressure oxygen mask the most according to claim 1 big flow outlet valve, it is characterised in that
Being additionally provided with the steel ball blocking fabrication hole in described outlet valve seat, described steel ball is joined with described fabrication hole interference
Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632094.XA CN103656909B (en) | 2013-11-29 | 2013-11-29 | Pressure oxygen mask big flow outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632094.XA CN103656909B (en) | 2013-11-29 | 2013-11-29 | Pressure oxygen mask big flow outlet valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103656909A CN103656909A (en) | 2014-03-26 |
| CN103656909B true CN103656909B (en) | 2016-08-31 |
Family
ID=50296442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310632094.XA Active CN103656909B (en) | 2013-11-29 | 2013-11-29 | Pressure oxygen mask big flow outlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103656909B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399195B (en) * | 2014-11-28 | 2017-11-17 | 航宇救生装备有限公司 | Supply oxygen pressure-regulating device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1522861A (en) * | 1975-01-09 | 1978-08-31 | Spasciani Spa Riccardo | Breathing apparatus |
| GB2264646A (en) * | 1992-02-12 | 1993-09-08 | Sabre Safety Ltd | Breathing apparatus |
| GB2269885A (en) * | 1990-05-10 | 1994-02-23 | Camberley Rubber Mouldings Lim | Non-return valve assembly |
| CN101884822A (en) * | 2010-07-23 | 2010-11-17 | 上海力申科学仪器有限公司 | Exhalation valve of breathing machine |
| CN102266636A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Gas relief valve and anesthesia machine containing same |
| CN103189092A (en) * | 2010-10-14 | 2013-07-03 | 文提菲克控股有限公司 | A respiratory valve apparatus |
| CN103372256A (en) * | 2012-04-27 | 2013-10-30 | 上海力申科学仪器有限公司 | Exhalation membrane valve |
| CN203591538U (en) * | 2013-11-29 | 2014-05-14 | 航宇救生装备有限公司 | Pressurizing oxygen supply mask high-flow expiration valve |
-
2013
- 2013-11-29 CN CN201310632094.XA patent/CN103656909B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1522861A (en) * | 1975-01-09 | 1978-08-31 | Spasciani Spa Riccardo | Breathing apparatus |
| GB2269885A (en) * | 1990-05-10 | 1994-02-23 | Camberley Rubber Mouldings Lim | Non-return valve assembly |
| GB2264646A (en) * | 1992-02-12 | 1993-09-08 | Sabre Safety Ltd | Breathing apparatus |
| CN101884822A (en) * | 2010-07-23 | 2010-11-17 | 上海力申科学仪器有限公司 | Exhalation valve of breathing machine |
| CN103189092A (en) * | 2010-10-14 | 2013-07-03 | 文提菲克控股有限公司 | A respiratory valve apparatus |
| CN102266636A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Gas relief valve and anesthesia machine containing same |
| CN103372256A (en) * | 2012-04-27 | 2013-10-30 | 上海力申科学仪器有限公司 | Exhalation membrane valve |
| CN203591538U (en) * | 2013-11-29 | 2014-05-14 | 航宇救生装备有限公司 | Pressurizing oxygen supply mask high-flow expiration valve |
Non-Patent Citations (1)
| Title |
|---|
| 加压供氧面罩呼气活门动态特性研究与仿真;卞泳;《万方数据知识服务平台》;20110701;第4-7页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103656909A (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107224685B (en) | Oxygen supply device for high-altitude parachuting | |
| CN103656909B (en) | Pressure oxygen mask big flow outlet valve | |
| CN202052225U (en) | Supply valve for respirator | |
| CN103182140B (en) | Breather valve | |
| CN203591538U (en) | Pressurizing oxygen supply mask high-flow expiration valve | |
| CN103212168B (en) | There is inlet valve and the face shield of surrounding air and gas cylinder air handoff functionality | |
| CN102380150B (en) | Pneumatic gas-controlled breathing machine | |
| CN208176747U (en) | The breathing agent set of positive-pressure type full facepiece mask | |
| CN2913770Y (en) | Venting escape valve | |
| US9050478B2 (en) | Supply valve for air respirator | |
| CN105833442A (en) | Bottle valve for mouthpiece type respiration gas bottle | |
| CN106855143A (en) | A kind of diaphragm check valve | |
| US11241596B2 (en) | Breathing mask and flushing arrangement for a breathing mask | |
| CN207286474U (en) | A kind of breathing agent set of full facepiece mask | |
| CN210139953U (en) | Portable constant-pressure diving emergency respirator | |
| CN208423038U (en) | A kind of explosion-proof grease proofing power battery safety valve | |
| CN208793733U (en) | A kind of two stage pressure reducing valves based on air bottle for life saving | |
| CN105545993B (en) | A kind of spring catcher with breathing structure | |
| CN214633290U (en) | Respirator for respiratory medicine | |
| US20080178883A1 (en) | Gas reclaim regulating valve assembly | |
| CN207545654U (en) | A kind of steam supply valve of the integrated outlet valve of novel small size | |
| CN102337924B (en) | Compound type self-rescuer | |
| CN107837470A (en) | A kind of steam supply valve of the integrated outlet valve of new small size | |
| CN202972066U (en) | Breathing type safety valve | |
| CN106267609A (en) | Meet an urgent need for boats and ships the decompressor of respiratory system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |