CN203591538U - Pressurizing oxygen supply mask high-flow expiration valve - Google Patents
Pressurizing oxygen supply mask high-flow expiration valve Download PDFInfo
- Publication number
- CN203591538U CN203591538U CN201320777476.7U CN201320777476U CN203591538U CN 203591538 U CN203591538 U CN 203591538U CN 201320777476 U CN201320777476 U CN 201320777476U CN 203591538 U CN203591538 U CN 203591538U
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- CN
- China
- Prior art keywords
- spring
- outlet valve
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a pressurizing oxygen supply mask high-flow expiration valve which comprises an expiration valve base, a valve knife edge and a valve plate. A mask valve, an exhaust cavity and an excess pressure cavity are arranged in the expiration valve base. A compensation film piece is arranged on the bottom of a center base. The compensation piece is tightly attached on the inner wall of the excess pressure cavity. A pressing plate is arranged in the excess pressure cavity. The lower end of the compensation film piece is fixed on the pressing plate. A pressure resisting channel is arranged in the expiration valve base. The pressure resisting channel is connected with the excess pressure cavity and an inspiration valve. According to the pressurizing oxygen supply mask high-flow expiration valve, an independent pressurizing pipeline is removed, the pressure of the compensation film piece of the expiration valve is guided out from the inspiration valve in the mask cover, namely pressure of an inspiration cavity is guided into the compensation film piece to generate resisting pressure, pressurizing breathing is guaranteed, the structure of a mask is simplified, mask weight is lowered, the overall height of the expiration valve is lowered, lower view is improved, the torque during high overload of the mask is lowered, and gas tightness of overload pressurizing is improved.
Description
Technical field
The utility model relates to oxygen mask, more particularly, relates to the large flow outlet valve of a kind of pressure oxygen mask.
Background technology
In order to meet pilot's oxygen supply demand, outlet valve in existing pressure oxygen mask has two kinds of complete different operating states: 1) normally supply oxygen condition: below 18km, when height air-tightness passenger cabin and the flight of non-air-tightness passenger cabin below 12km, guarantee the normal oxygen supply of pilot; 2) emergency oxygen supply state: in the time of the non-pressure cabin of 12km～18km or explosive decompression, set up relevant pressure in face shield, guarantee the pressure breathing oxygen that pilot is continued for some time.
Outlet valve be every folding once, face shield chamber just with extraneous break-make once.Outlet valve is breathed and is worked asynchronously with pilot in the middle of using, and with regard to operation cycle once, therefore its duty is directly connected to whole face shield oxygen supply function and whether realizes outlet valve of every breathing.
The height dimension of existing outlet valve is bigger than normal, and to make like this outlet valve be arranged on face shield projecting surface cover too high, makes its whole face shield center of gravity away from head center of gravity, and the moment of torsion of face shield in the time of high overload is excessive, easily causes transshipping bad stability.Existing outlet valve adopts independent pressure piping bleed to form resistance to compression to outlet valve cavity of resorption, causes whole face shield weight bigger than normal, affects the comfortableness that face shield is worn.Existing outlet valve expiratory resistance is bigger than normal, causes pilot to wear for a long time face shield flight, easily produces and breathes fatigue, affects face shield comfortable wearing.
Summary of the invention
The technical problems to be solved in the utility model is, provides little, the lightweight pressure oxygen mask of a kind of volume large flow outlet valve.
The utility model solves the technical scheme that its technical problem adopts: construct the large flow outlet valve of a kind of pressure oxygen mask, comprise outlet valve seat, the valve edge of a knife and valve plate, in described outlet valve seat, be provided with face shield chamber, discharge chamber and overbottom pressure chamber, described outlet valve seat is provided with centre mount, between described centre mount top and described valve plate, be provided with the first spring, between described centre mount bottom and described outlet valve seat, be provided with the second spring, described centre mount bottom is also provided with compensating diaphragm, described compensating diaphragm is close on the inwall in described overbottom pressure chamber, described overbottom pressure is also provided with pressing plate in chamber, the lower end of described compensating diaphragm is fixed on described pressing plate, in described outlet valve seat, be also provided with antagonism pressure passageway, described antagonism pressure passageway connects described overbottom pressure chamber and air suction valve.
In such scheme, in the time of the poised state of outlet valve during in normal oxygen supply, there is following balance:
F
1=k
1x
1=P
p+m
1g
F
2=k
2x
2=P
p+m
1g+m
k1g+m
2g+F
f
Wherein, F
1, F
2be respectively the elastic force of the first spring and the second spring, P
pfor pre-compression force, m
1for the quality of valve plate, m
k1for the quality of spring the first spring, m
2centered by seat quality, F
ffor the resistance of compensating diaphragm, k
1, k
2be respectively the rigidity of the first spring and the second spring, x
1, x
2be respectively the compression distance of the first spring and the second spring.
In such scheme, in the time of the poised state of outlet valve during in pressure breathing oxygen, there is following balance:
k
2x
2+P
1=P
p+m
1g+m
k1g+m
2g+F
f+k
1x
1+P
2
P
2=P*πd
2/4
P
1=P*π*（d
2 2+d
1d
2+d
1 2）/12
Wherein, P
pfor pre-compression force, m
1for the quality of valve plate, m
k1be the quality of the first spring, m
2centered by seat quality, F
ffor the resistance of compensating diaphragm, k
1, k
2be respectively the rigidity of the first spring and the second spring, x
1, x
2be respectively the compression distance of the first spring and the second spring, P
1for act on the axial force on centre mount, P by compensating diaphragm
2for acting on the axial force of valve plate, pressure when P is pressure breathing oxygen, d is valve edge of a knife diameter, d
1for the hard central diameter of compensating diaphragm, d
2for compensating diaphragm working diameter.
In such scheme, the rigidity of described the first spring is 0.016-0.024N/m, and quality is 2.4-3.6g, and the rigidity of described the 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 d of compensating diaphragm described in described valve edge of a knife diameter d=15-21mm
1=8-12mm, compensating diaphragm working diameter d
2=6-10mm.
In such scheme, the exit of described antagonism pressure passageway is provided with adapter, and described adapter is crimped on described outlet valve seat by interference fit.
In such scheme, described pressing plate is by fixing through the sunk screw of described outlet valve seat.
In such scheme, described the second spring comprises volute spring and cylindrical spring, and described volute spring is connected with described centre mount, and described cylindrical spring is connected with described outlet valve seat.
In such scheme, in described outlet valve seat, be also provided with the steel ball of blocking fabrication hole, described steel ball and described fabrication hole interference fit.
Implement the large flow outlet valve of pressure oxygen mask of the present utility model, there is following beneficial effect:
The utility model has been cancelled independent pressure piping, the compensating diaphragm pressure of outlet valve is from air suction valve, to draw in face shield chamber, introduce the compensating diaphragm pressure that creates antagonism by the pressure of suction muffler, guarantee pressure breathing, simplify face mask structure, alleviated face shield weight, reduced outlet valve total height, improved downward view, and reduce the moment of torsion of face shield in the time of high overload, improve the air-tightness of overload pressurization.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of the large flow outlet valve of the utility model pressure oxygen mask;
Poised state force simplified figure when Fig. 2 is the normal oxygen supply of outlet valve;
Poised state force simplified figure when Fig. 3 is outlet valve pressure breathing oxygen.
The specific embodiment
Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present utility model in detail.
As shown in Figure 1, the large flow outlet valve of the utility model pressure oxygen mask comprises outlet valve seat 1, the valve edge of a knife 6 and valve plate 5.In outlet valve seat 1, be provided with face shield chamber 12, discharge chamber 13 and overbottom pressure chamber 14, when expiration, valve plate 5 is opened, and gas is discharged from discharge chamber 13.Outlet valve seat 1 is provided with centre mount 4, is provided with the first spring 9 between centre mount 4 tops and valve plate 5, is provided with the second spring 8 between centre mount 4 bottoms and outlet valve seat 1.Centre mount 4 bottoms are also provided with compensating diaphragm 3, compensating diaphragm 3 is close on the inwall in overbottom pressure chamber 14, is also provided with pressing plate 2 in overbottom pressure chamber 14, and the lower end of compensating diaphragm 3 is fixed on pressing plate 2, in outlet valve seat 1, be also provided with antagonism pressure passageway, antagonism pressure passageway connects overbottom pressure chamber 14 and air suction valve.Compensating diaphragm 3 pressure of outlet valve are from air suction valve, to draw in face shield chamber 12, introduce compensating diaphragm 3 pressures that create antagonism, assurance pressure breathing by the pressure of suction muffler.
There are following two equilibrium states in the utility model outlet valve;
1, poised state when the normal oxygen supply of outlet valve;
The stress balance state of outlet valve in the time of normal oxygen supply, can be reduced to spring stress principle sketch, as shown in Figure 2.During for calculated equilibrium state, the stressing conditions of spring and diaphragm, valve plate 5, centre mount 4 and compensating diaphragm 3 are all simplified, because compensating diaphragm 3 is mainly the distortion of diaphragm generating material in working order, what its deformation force can be similar to thinks certain value, is therefore reduced to a resistance F
f, the Resistance Value of compensating diaphragm 3 can be obtained by experiment.Therefore can be similar to and obtain the stress balance formula of valve in the time of normal oxygen supply:
F
1=k
1x
1=P
p+m
1g
F
2=k
2x
2=P
p+m
1g+m
k1g+m
2g+F
f
Wherein, F
1, F
2be respectively the elastic force of the first spring 9 and the second spring 8, P
pfor pre-compression force, m
1for the quality of valve plate 5, m
k1for the quality of spring the first spring 9, m
2centered by seat 4 quality, F
ffor the resistance of compensating diaphragm 3, k
1, k
2be respectively the rigidity of the first spring 9 and the second spring 8, x
1, x
2be respectively the compression distance of the first spring 9 and the second spring 8, k is the global stiffness of the first spring 9 and the second spring 8.
Because the first spring 9 and the second spring 8 adopt cascaded structure, therefore its global stiffness is:
k=k
1k
2/(k
1+k
2)
For preventing overbottom pressure chamber 14 is interior while there is negative pressure, the situation that the valve plate 5 that occurs centre mount 4 to move down and to cause is opened, need to be in the time of valve poised state, the compression distance of the first spring 9 is greater than H, while moving down into extreme lower position with assurance centre mount 4, the first spring 9 still can make valve plate 5 touch valve base after extending, and guarantees airtightly to prevent that outside air from entering in face shield chamber 12.
From above formula, as need reduce outlet valve resistance, can realize by increasing valve valid circulation area, and increase valid circulation area, can realize by the open degree that increases the valve edge of a knife 6 diameters and valve, can also guarantee, under the bubble-tight prerequisite of outlet valve, to reduce as far as possible the pre-compression force P of spring and compensating diaphragm 3
pand the global stiffness of spring, and reduce, spring global stiffness can pass through to reduce the weight of valve plate 5, centre mount 4 and the first spring 9 and the resistance of compensating diaphragm 3 is realized, and the resistance of reduction diaphragm can adopt the method such as attenuate diaphragm thickness and reduction membrane tension to realize.
According to mentioned above principle, the rigidity of the utility model the first spring 9 is 0.016-0.024N/m, and quality is 2.4-3.6g, and the rigidity of the second spring 8 is 0.024-0.036N/m, and quality is 6.4-9.6g, and the thickness of compensating diaphragm 3 is 0.1-0.3mm.In a preferred embodiment, the rigidity of the first spring 9 is 0.02N/m, and quality is 3g, and 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 when outlet valve pressure breathing oxygen:
The stress balance state of outlet valve in the time of pressure breathing oxygen, can be reduced to spring stress principle sketch, as shown in Figure 3.During for calculated equilibrium state, the stressing conditions of spring and diaphragm, all adopts valve plate 5, centre mount 4 and compensating diaphragm 3 to use the same method and simplifies, and therefore can be similar to and obtain the stress balance formula of valve in the time of pressure breathing oxygen:
k
2x
2+P
1=P
p+m
1g+m
k1g+m
2g+F
f+k
1x
1+P
2
P
2=P*πd
2/4
Wherein, P
pfor pre-compression force, m
1for the quality of valve plate 5, m
k1be the quality of the first spring 9, m
2centered by seat 4 quality, F
ffor the resistance of compensating diaphragm 3, k
1, k
2be respectively the rigidity of the first spring 9 and the second spring 8, x
1, x
2be respectively the compression distance of the first spring 9 and the second spring 8, P
2for acting on the axial force of valve plate 5, pressure when P is pressure breathing oxygen, d is the valve edge of a knife 6 diameters, d
1for the hard central diameter of compensating diaphragm 3, d
2for compensating diaphragm 3 working diameters.
Because making diaphragm produce dilatancy by pressure, diaphragm transmits power, because pressure will inevitably produce the loss of certain power in the time transmitting concentrated force by diaphragm, therefore act on the effective area that ratio that pressure on diaphragm is converted into concentrated force is called diaphragm.The effective diaphragm area formula of center power transmission is as follows:
F=π*（d
2 2+d
1d
2+d
1 2）/12
Wherein F is effective diaphragm area, d
1for the hard central diameter of compensating diaphragm 3, d
2for compensating diaphragm 3 working diameters.
Act on the axial force P on centre mount 4 by compensating diaphragm 3
1=P*F=P* π * (d
2 2+ d
1d
2+ d
1 2)/12.
By above formula, can calculate diaphragm key parameter is the relation between diaphragm working diameter and hard central diameter (being centre mount 4 diameters), and known under pressure breathing oxygen condition, the size of the axial force value by iris action on centre mount 4.By the design key parameter of the known compensating diaphragm 3 of above formula.
The hard central diameter d of compensating diaphragm 3 in the present embodiment
1=8-12mm, compensating diaphragm 3 working diameter d
2=6-10mm, the valve edge of a knife 6 diameter d=15-21mm, preferred d
1=10mm, d
2=8mm, d=18mm.
Can make outlet valve height be reduced to 19mm by former height 38mm according to above-mentioned formula and selected parameters of operating part, after installing, protrude face shield height and be reduced to 7mm by 28mm, make like this valve center of gravity as far as possible near face.This can make the center of gravity of face shield near head center of gravity, reduces the moment of torsion of face shield in the time of high overload, improves the air-tightness of overload pressurization.Because oxygen system is cancelled independent pressure piping, compensating diaphragm 3 pressure of outlet valve are from air suction valve, to draw in face shield chamber 12, introduce compensating diaphragm 3 pressures that create antagonism by the pressure of suction muffler, assurance pressure breathing, this design can be simplified face mask structure, alleviate face shield weight.Outlet valve is optimized to design makes the resistance of expiratory resistance under 60L/min be reduced to 0.15KPa left and right by 0.32KPa.
Further, the exit of antagonism pressure passageway is provided with adapter 7, and adapter 7 is crimped on outlet valve seat 1 by interference fit.Adapter 7 is for being connected with the suction muffler of air suction valve.In outlet valve seat 1, be also provided with the steel ball 10 of blocking fabrication hole, steel ball 10 and fabrication hole interference fit.
Further, pressing plate 2 is fixing by the sunk screw 11 through outlet valve seat 1, and the valve edge of a knife 6 is threaded connection with outlet valve seat 1.
Further, the second spring 8 comprises volute spring and cylindrical spring, and volute spring is connected with centre mount 4, and cylindrical spring is connected with outlet valve seat 1.Volute spring is positioned the outside of centre mount 4, and cylindrical spring is positioned pressing plate 2 inner sides.When valve plate 5 is opened, first there is deformation in cylindrical spring, and when valve plate 5 is closed, deformation first occurs volute spring, and the rigidity of volute spring is greater than the rigidity of cylindrical spring, therefore can realize opening fast and quick closedown of valve plate 5.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, also can make a lot of forms, within these all belong to protection of the present utility model.
Claims (10)
1. the large flow outlet valve of pressure oxygen mask, comprise outlet valve seat, the valve edge of a knife and valve plate, in described outlet valve seat, be provided with face shield chamber, discharge chamber and overbottom pressure chamber, it is characterized in that, described outlet valve seat is provided with centre mount, between described centre mount top and described valve plate, be provided with the first spring, between described centre mount bottom and described outlet valve seat, be provided with the second spring, described centre mount bottom is also provided with compensating diaphragm, described compensating diaphragm is close on the inwall in described overbottom pressure chamber, described overbottom pressure is also provided with pressing plate in chamber, the lower end of described compensating diaphragm is fixed on described pressing plate, in described outlet valve seat, be also provided with antagonism pressure passageway, described antagonism pressure passageway connects described overbottom pressure chamber and air suction valve.
2. the large flow outlet valve of pressure oxygen mask according to claim 1, is characterized in that, in the time of the poised state of outlet valve during in normal oxygen supply, has following balance:
F
1=k
1x
1=P
p+m
1g
F
2=k
2x
2=P
p+m
1g+m
k1g+m
2g+F
f
Wherein, F
1, F
2be respectively the elastic force of the first spring and the second spring, P
pfor pre-compression force, m
1for the quality of valve plate, m
k1for the quality of spring the first spring, m
2centered by seat quality, F
ffor the resistance of compensating diaphragm, k
1, k
2be respectively the rigidity of the first spring and the second spring, x
1, x
2be respectively the compression distance of the first spring and the second spring.
3. the large flow outlet valve of pressure oxygen mask according to claim 2, is characterized in that, in the time of the poised state of outlet valve during in pressure breathing oxygen, has following balance:
k
2x
2+P
1=P
p+m
1g+m
k1g+m
2g+F
f+k
1x
1+P
2
P
2=P*πd
2/4
P
1=P*π*（d
2 2+d
1d
2+d
1 2）/12
Wherein, P
pfor pre-compression force, m
1for the quality of valve plate, m
k1be the quality of the first spring, m
2centered by seat quality, F
ffor the resistance of compensating diaphragm, k
1, k
2be respectively the rigidity of the first spring and the second spring, x
1, x
2be respectively the compression distance of the first spring and the second spring, P
1for act on the axial force on centre mount, P by compensating diaphragm
2for acting on the axial force of valve plate, pressure when P is pressure breathing oxygen, d is valve edge of a knife diameter, d
1for the hard central diameter of compensating diaphragm, d
2for compensating diaphragm working diameter.
4. the large flow outlet valve of pressure oxygen mask according to claim 3, it is characterized in that, the rigidity of described the first spring is 0.016-0.024N/m, and quality is 2.4-3.6g, the rigidity of described the second spring is 0.024-0.036N/m, and quality is 6.4-9.6g.
5. the large flow outlet valve of pressure oxygen mask according to claim 3, is characterized in that, the thickness of described compensating diaphragm is 0.1-0.3mm.
6. the large flow outlet valve of pressure oxygen mask according to claim 3, is characterized in that, the hard central diameter d of compensating diaphragm described in described valve edge of a knife diameter d=15-21mm
1=8-12mm, compensating diaphragm working diameter d
2=6-10mm.
7. the large flow outlet valve of pressure oxygen mask according to claim 1, is characterized in that, the exit of described antagonism pressure passageway is provided with adapter, and described adapter is crimped on described outlet valve seat by interference fit.
8. the large flow outlet valve of pressure oxygen mask according to claim 1, is characterized in that, described pressing plate is by fixing through the sunk screw of described outlet valve seat.
9. the large flow outlet valve of pressure oxygen mask according to claim 1, is characterized in that, described the second spring comprises volute spring and cylindrical spring, and described volute spring is connected with described centre mount, and described cylindrical spring is connected with described outlet valve seat.
10. the large flow outlet valve of pressure oxygen mask according to claim 1, is characterized in that, in described outlet valve seat, is also provided with the steel ball of blocking fabrication hole, described steel ball and described fabrication hole interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320777476.7U CN203591538U (en) | 2013-11-29 | 2013-11-29 | Pressurizing oxygen supply mask high-flow expiration valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320777476.7U CN203591538U (en) | 2013-11-29 | 2013-11-29 | Pressurizing oxygen supply mask high-flow expiration valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203591538U true CN203591538U (en) | 2014-05-14 |
Family
ID=50672489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320777476.7U Withdrawn - After Issue CN203591538U (en) | 2013-11-29 | 2013-11-29 | Pressurizing oxygen supply mask high-flow expiration valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203591538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656909A (en) * | 2013-11-29 | 2014-03-26 | 航宇救生装备有限公司 | Pressurizing oxygen supply mask mass flow breathing valve |
-
2013
- 2013-11-29 CN CN201320777476.7U patent/CN203591538U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656909A (en) * | 2013-11-29 | 2014-03-26 | 航宇救生装备有限公司 | Pressurizing oxygen supply mask mass flow breathing valve |
| CN103656909B (en) * | 2013-11-29 | 2016-08-31 | 航宇救生装备有限公司 | Pressure oxygen mask big flow outlet valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140514 Effective date of abandoning: 20160831 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |