CN204405657U - A kind of confined chamber of equilibrium air pressure - Google Patents
A kind of confined chamber of equilibrium air pressure Download PDFInfo
- Publication number
- CN204405657U CN204405657U CN201420814191.0U CN201420814191U CN204405657U CN 204405657 U CN204405657 U CN 204405657U CN 201420814191 U CN201420814191 U CN 201420814191U CN 204405657 U CN204405657 U CN 204405657U
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- CN
- China
- Prior art keywords
- threeway
- rotary valve
- confined chamber
- collection bag
- pneumatic rotary
- Prior art date
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Abstract
The utility model discloses a kind of confined chamber of equilibrium air pressure, confined chamber comprises confined chamber casing, vacuum pump, gas collection bag a, gas collection bag b, threeway pneumatic rotary valve a, the pneumatic rotary valve b of threeway, it is outside that described gas collection bag a is arranged on confined chamber casing, the air inlet/outlet of described gas collection bag a is connected with the mouth a of the pneumatic rotary valve a of threeway, the mouth b of the pneumatic rotary valve a of threeway leads directly to confined chamber box house, and the gas outlet c of the pneumatic rotary valve a of described threeway is connected with vacuum pump; Described gas collection bag b is arranged on the furred ceiling in confined chamber casing, the air inlet/outlet of described gas collection bag b is connected with the mouth d of the pneumatic rotary valve b of threeway, the mouth e of the pneumatic rotary valve b of described threeway leads directly to the atmospheric environment of confined chamber casing outside, and the gas outlet f of the pneumatic rotary valve b of threeway is connected with vacuum pump.With supporting in this gas collection bag, totally thorough when vacuumizing, reach requirement rapidly; Impermeability is good, and No leakage is without chemical reaction, and test data is accurate, test favorable reproducibility.
Description
Technical field
The utility model relates to a kind of confined chamber of equilibrium air pressure.
Background technology
Confined chamber method is a kind of method of motorcycle fuel evaporation emissions measurement general in the world.In experimentation, the change of airtight indoor environment temperature can cause the pressure in confined chamber to occur floating, and the change of the pressure of confined chamber can affect fuel evaporation speed, thus the accuracy of impact test is repeatable.Therefore on confined chamber, flexible extension container should be installed, to balance the pressure change caused due to the subtle change of temperature.Meanwhile, because combustion main body of oil is hydrocarbon, sulfide etc., selected flexible extension container must not permeate and volatilize these materials, also can not react with these materials.
In addition, during experiment, in the fuel oil of evaporation, principal ingredient is hydrocarbon, sulfide, and majority of gas collecting bag adopts plastic interface or metal interface, and with rubber seal, exist sealing property not up to standard, be easy to the problems such as hydrocarbon sulfide generation chemical reaction, ventilation valve body is not only easily corroded, impact adopts the impermeability of gas sampling bag, also has a strong impact on testing result simultaneously.
Utility model content
In order to overcome the problems referred to above, the purpose of this utility model is to provide a kind of gas collection bag, effectively solves the problems such as gas collection bag in prior art vacuumizes not thoroughly, sealing property is poor, corrosion resistivity is poor.
The technical scheme that the utility model is adopted for achieving the above object is:
A kind of confined chamber of equilibrium air pressure, comprise confined chamber casing, vacuum pump, gas collection bag a, gas collection bag b, threeway pneumatic rotary valve a, the pneumatic rotary valve b of threeway, it is outside that described gas collection bag a is arranged on confined chamber casing, the air inlet/outlet of described gas collection bag a is connected with the mouth a of the pneumatic rotary valve a of threeway, the mouth b of the pneumatic rotary valve a of threeway leads directly to confined chamber box house, and the gas outlet c of the pneumatic rotary valve a of described threeway is connected with vacuum pump; Described gas collection bag b is arranged on the furred ceiling in confined chamber casing, the air inlet/outlet of described gas collection bag b is connected with the mouth d of the pneumatic rotary valve b of threeway, the mouth e of the pneumatic rotary valve b of described threeway leads directly to the atmospheric environment of confined chamber casing outside, and the gas outlet f of the pneumatic rotary valve b of threeway is connected with vacuum pump.
Before experiment starts, by pneumatic for threeway rotary valve a connected entrance a and gas outlet c, threeway pneumatic rotary valve b connected entrance d and gas outlet f, open vacuum pump, by the evacuating air in gas collection bag a and gas collecting bag b, until its pressure reaches a stable background value.
During experiment, if the temperature of confined chamber reduces, be communicated with mouth d by the mouth e of pneumatic for threeway rotary valve b, air enters gas collection bag b by the pneumatic rotary valve b of threeway, and gas collection bag b expands, and confined chamber net volume reduces, and confined chamber inner and outer air pressure is consistent.If the temperature of confined chamber raises, be communicated with mouth b by the mouth a of pneumatic for threeway rotary valve a, the gas in confined chamber enters gas collection bag a by the pneumatic rotary valve a of threeway, and gas collection bag a expands, and confined chamber net volume increases, and confined chamber inner and outer air pressure is consistent.
At the end of experiment, by pneumatic for threeway rotary valve a connected entrance a and gas outlet c, threeway pneumatic rotary valve b connected entrance d and gas outlet f, open vacuum pump, by the evacuating air in gas collection bag a and gas collecting bag b, until its pressure reaches a stable background value, use in order to during experiment.
the beneficial effect of utility model:
1, support is had in this gas collection bag, totally thorough when vacuumizing, reach requirement rapidly;
2, the impermeability of this gas collection bag is good, and No leakage is without chemical reaction, and test data is accurate, test favorable reproducibility.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
The utility model structural representation when Fig. 2 is temperature decline;
The utility model structural representation when Fig. 3 is temperature rising;
In figure, 1, vacuum pump; 2, gas collection bag a; 3, gas collection bag b; 4, the pneumatic rotary valve a of threeway; 5, the pneumatic rotary valve b of threeway; 6, confined chamber; 41, mouth a; 42, mouth b; 43, gas outlet c; 51, mouth d; 52, mouth e; 53, gas outlet f.
Embodiment
Embodiment 1
As shown in Figure 1, a kind of confined chamber of equilibrium air pressure, bag confined chamber casing, draw together vacuum pump 1, gas collection bag a2, gas collection bag b3, threeway pneumatic rotary valve a4, the pneumatic rotary valve b5 of threeway, it is outside that described gas collection bag a2 is arranged on confined chamber casing 6, the air inlet/outlet of described gas collection bag a2 is connected with the mouth a41 of the pneumatic rotary valve a4 of threeway, the mouth b42 of the pneumatic rotary valve a4 of threeway leads directly to confined chamber casing 6 inside, and the gas outlet c43 of the pneumatic rotary valve a4 of described threeway is connected with vacuum pump 1; Described gas collection bag b3 is arranged on the furred ceiling in confined chamber casing 6, the air inlet/outlet of described gas collection bag b3 is connected with the mouth d51 of the pneumatic rotary valve b5 of threeway, the mouth e52 of the pneumatic rotary valve b5 of described threeway leads directly to the atmospheric environment of confined chamber casing 6 outside, and the gas outlet f53 of the pneumatic rotary valve b5 of threeway is connected with vacuum pump 1.
Before experiment starts, by pneumatic for threeway rotary valve a4 connected entrance a41 and gas outlet c43, threeway pneumatic rotary valve b5 connected entrance d51 and gas outlet f53, open vacuum pump 1, by the evacuating air in gas collection bag a2 and gas collecting bag b3, until its pressure reaches a stable background value.
As shown in Figure 2 and Figure 3, during experiment, if the temperature of confined chamber 6 reduces, be communicated with mouth d51 by the mouth e52 of pneumatic for threeway rotary valve b5, air enters gas collection bag b3 by the pneumatic rotary valve b5 of threeway, and gas collection bag b3 expands, confined chamber 6 net volume reduces, and confined chamber 6 inner and outer air pressure is consistent.If the temperature of confined chamber 6 raises, be communicated with mouth b42 by the mouth a41 of pneumatic for threeway rotary valve a4, the gas in confined chamber 6 enters gas collection bag a2 by the pneumatic rotary valve a4 of threeway, and gas collection bag a2 expands, confined chamber 6 net volume increases, and confined chamber 6 inner and outer air pressure is consistent.
At the end of experiment, by pneumatic for threeway rotary valve a4 connected entrance a41 and gas outlet c43, threeway pneumatic rotary valve b5 connected entrance d51 and gas outlet f53, open vacuum pump 1, by the evacuating air in gas collection bag a2 and gas collecting bag b3, until its pressure reaches a stable background value, use in order to during experiment.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection domain of the present utility model.
Claims (1)
1. the confined chamber of an equilibrium air pressure, it is characterized in that: comprise confined chamber casing, vacuum pump, gas collection bag a, gas collection bag b, threeway pneumatic rotary valve a, the pneumatic rotary valve b of threeway, it is outside that described gas collection bag a is arranged on confined chamber casing, the air inlet/outlet of described gas collection bag a is connected with the mouth a of the pneumatic rotary valve a of threeway, the mouth b of the pneumatic rotary valve a of threeway leads directly to confined chamber box house, and the gas outlet c of the pneumatic rotary valve a of described threeway is connected with vacuum pump; Described gas collection bag b is arranged on the furred ceiling in confined chamber casing, the air inlet/outlet of described gas collection bag b is connected with the mouth d of the pneumatic rotary valve b of threeway, the mouth e of the pneumatic rotary valve b of described threeway leads directly to the atmospheric environment of confined chamber casing outside, and the gas outlet f of the pneumatic rotary valve b of threeway is connected with vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420814191.0U CN204405657U (en) | 2014-12-19 | 2014-12-19 | A kind of confined chamber of equilibrium air pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420814191.0U CN204405657U (en) | 2014-12-19 | 2014-12-19 | A kind of confined chamber of equilibrium air pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204405657U true CN204405657U (en) | 2015-06-17 |
Family
ID=53429507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420814191.0U Expired - Fee Related CN204405657U (en) | 2014-12-19 | 2014-12-19 | A kind of confined chamber of equilibrium air pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204405657U (en) |
-
2014
- 2014-12-19 CN CN201420814191.0U patent/CN204405657U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20151219 |
|
| EXPY | Termination of patent right or utility model |