CN102793960B - Air path device for pneumatic control passage switching and control method - Google Patents
Air path device for pneumatic control passage switching and control method Download PDFInfo
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- CN102793960B CN102793960B CN201210288001.1A CN201210288001A CN102793960B CN 102793960 B CN102793960 B CN 102793960B CN 201210288001 A CN201210288001 A CN 201210288001A CN 102793960 B CN102793960 B CN 102793960B
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- spool
- valve
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- gas outlet
- air inlet
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Abstract
The invention relates to an air path device for pneumatic control passage switching and a control method. The air path device comprises a two-position three-way mechanical valve and a sequence valve, wherein the two-position three-way mechanical valve is provided with a manual switch, an air inlet for feeding control air, an exhaust port and a public port; the sequence valve is provided with a valve body, a valve core and an elastic element; a sealing structure for sealing an oxygen inlet port and outlet air path when the valve core slides towards one side in place is arranged between the valve core and the valve body; and another sealing structure for sealing an air inlet port and outlet air path when the valve core slides towards the other side in place is arranged between the valve core and the valve body; and after assembly, a connecting passage on the sequence valve is hermetically connected with the public port of the two-position three-way mechanical valve. After the structure and the control method are adopted, three open passages in the sequence valve can be mutually switched through opening and closing action of the manual switch of the two-position three-way mechanical valve.
Description
Technical field
The present invention relates to the breathing apparatus technical field in armarium, refer in particular to a kind of gas path device and control method of pneumatic control switched path.
Background technology
At present, in the breathing apparatus of medical field, breathing apparatus supply oxygen is to patient respiration or carry out first aid, sometimes, need oxygen and air to be realized automatic switching function to be arranged on to reach the requirement for patient respiration in breathing apparatus, this just needs a kind of gas path device of pneumatic control switched path and control method to automatically switch to the gas circuit of oxygen and the gas circuit of air.In view of this, how to provide a kind of structure simple, easy to assembly, become have problem to be solved by controlling now reliably the automatically switch gas path device of gas circuit and control method of QI excess.
Summary of the invention
Object of the present invention is exactly that a kind of structure provided for the deficiencies in the prior art part is simple, easy to assembly, the gas path device of pneumatic control switched path and control method.
For achieving the above object, the gas path device of a kind of pneumatic control switched path of the present invention, includes:
Two-position three way mechanical valve, air inlet, air vent and common port that this two-position three way mechanical valve has hand switch and enters for control gas;
Sequence valve, this sequence valve has valve body, spool, flexible member, one end of valve body has interface channel, the one airtight slip in end of spool is located in this interface channel, the spaced apart oxygen inlet port being provided with the air inlet, gas outlet, the oxygen that enter for air and entering on valve body, flexible member is located between spool and valve body to make spool have back stretch, gas outlet between air inlet and oxygen inlet port, have between spool and valve body spool toward side slide put in place after seal the hermetically-sealed construction of oxygen inlet port and gas outlet gas circuit; Have between spool and valve body spool toward opposite side slide put in place after another hermetically-sealed construction of sealing air air inlet and gas outlet gas circuit;
After assembling, the common port of the interface channel on sequence valve and two-position three way mechanical valve is tightly connected.
Hermetically-sealed construction between described spool and valve body includes: the sealing block on spool, to be interposed between sealed wall between oxygen inlet port and gas outlet, after spool puts in place toward side slip under control gas effect, the sealing block shutoff on spool to be interposed between on the sealed wall between oxygen inlet port and gas outlet.
Another hermetically-sealed construction between described spool and valve body includes: the sealing block on spool, to be interposed between another sealed wall between air inlet and gas outlet, after putting in place when sliding toward opposite side under the effect of spool at flexible member, the sealing block shutoff on spool to be interposed between on another sealed wall between air inlet and gas outlet.
Described flexible member is spring.
The control method of the gas path device of a kind of pneumatic control switched path of the present invention, includes following steps:
The first step, opens the hand switch of two-position three way mechanical valve, opens air inlet and air inlet is communicated with common port, simultaneously by exhaust close;
Second step, controls gas and enters by common port the end that interface channel acts on spool, the elastic force that an end of spool overcomes flexible member under the driving controlling gas by spool before sliding is dynamic puts in place;
3rd step, spool makes air inlet be communicated with gas outlet, and meanwhile, spool blocks the connection between oxygen inlet port and gas outlet, and the air of air inlet is sent by gas outlet after the cavity in sequence valve.
4th step, closes the hand switch of two-position three way mechanical valve, closes air inlet and being communicated with between common port, and air vent is communicated with common port;
5th step, spool makes end adverse movement in interface channel of spool put in place under the elastic force effect of flexible member,
6th step, spool makes oxygen inlet port be communicated with gas outlet, and meanwhile, spool blocks the connection between air inlet and gas outlet, and the oxygen of oxygen inlet port is sent by gas outlet after the cavity in sequence valve.
After adopting said structure and control method, by the opening and closing movement of the hand switch to two-position three way mechanical valve, just switched path between two can be carried out to the open passageway of 3 in sequence valve.Therefore, gas path device structure of the present invention is simple, parts are few, easy to assembly, adopts control method of the present invention just can realize automatic switchover gas circuit by simple manual operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of gas path device of the present invention.
Fig. 2 is the structure principle chart that gas path device of the present invention is applied in actual gas circuit.
Detailed description of the invention
As Fig. 1-2 shows, the gas path device of a kind of pneumatic control switched path of the present invention, includes:
Two-position three way mechanical valve 10, air inlet 12, air vent 13 and common port 14 that this two-position three way mechanical valve has hand switch 11 and enters for control gas;
Sequence valve 20, this sequence valve has valve body 21, spool 22, flexible member 23, one end of valve body 21 has interface channel 21a, the airtight slip of one end 22a of spool 22 is located in this interface channel 21a, the spaced apart air inlet 21b being provided with confession air and entering on valve body 21, gas outlet 21c, the oxygen inlet port 21d that oxygen enters, flexible member 23 is located between spool 22 and valve body 21 to make spool 22 have back stretch, gas outlet 21c is between air inlet 21b and oxygen inlet port 21d, have between spool 22 and valve body 21 spool 22 toward side slide put in place after seal the hermetically-sealed construction of oxygen inlet port 21d and gas outlet 21c gas circuit, have between spool 22 and valve body 21 spool 22 toward opposite side slide put in place after another hermetically-sealed construction of sealing air air inlet 21b and gas outlet 21c gas circuit,
After assembling, being tightly connected of the interface channel 21a on sequence valve 20 and the common port 14 of two-position three way mechanical valve 10.
Hermetically-sealed construction between described spool 22 and valve body 21 includes: the sealing block 22b on spool 22, to be interposed between sealed wall 21e between oxygen inlet port 21d and gas outlet 21c, after spool 22 puts in place toward side slip under control gas effect, the sealing block 22b shutoff on spool 22 to be interposed between on the sealed wall 21e between oxygen inlet port 21d and gas outlet 21c.Sealing block 22b can arrange the air-tightness that a sealing gasket comes between enhanced leaktightness block 22b and sealed wall 21e.
Another hermetically-sealed construction between described spool 22 and valve body 21 includes: the sealing block 22b on spool 22, to be interposed between another sealed wall 21f between air inlet 21b and gas outlet 21c, after spool 22 slides toward opposite side and puts in place under the effect of flexible member 23, the sealing block 22b shutoff on spool 22 to be interposed between on another sealed wall 21f between air inlet 21b and gas outlet 21c.Sealing block 22b can arrange the air-tightness that another sealing gasket comes between enhanced leaktightness block 22b and another sealed wall 21f.
Described flexible member 23 is spring.
During concrete enforcement, spool 22 can be arranged to three slippers connected with connecting rod, the rearward end of spool 22 is that the airtight slip of an end 22a of spool 22 is located in this interface channel 21a, the middle part of spool 22 is the sealing block 22b on spool 22, the front portion of spool 22 compresses for spring, and the front portion of spool 22 and valve body 21 are slidably matched the axiality that keeps spool 22 to slide.
The control method of the gas path device of a kind of pneumatic control switched path of the present invention, includes following steps:
The first step, opens the hand switch 11 of two-position three way mechanical valve 10, opens air inlet 12 and air inlet 12 is communicated with common port 14, closed by air vent 13 simultaneously;
Second step, controls gas and enters by common port 14 the end 22a that interface channel 21a acts on spool, the elastic force that an end 22a of spool overcomes flexible member 23 under the driving controlling gas by spool 22 before sliding is dynamic puts in place;
3rd step, spool 22 makes air inlet 21b be communicated with gas outlet 21c, meanwhile, spool 22 blocks the connection between oxygen inlet port 21d and gas outlet 21c, and the air of air inlet 21b is sent by gas outlet 21c after the cavity in sequence valve 20.
4th step, closes the hand switch 11 of two-position three way mechanical valve 10, closes air inlet 12 and being communicated with between common port 14, and air vent 13 is communicated with common port 14;
5th step, spool 22 makes end 22a adverse movement in interface channel 21a of spool 22 put in place under the elastic force effect of flexible member 23,
6th step, spool 22 makes oxygen inlet port 21d be communicated with gas outlet 21c, meanwhile, spool 22 blocks the connection between air inlet 21b and gas outlet 21c, and the oxygen of oxygen inlet port 21d is sent by gas outlet 21c after the cavity in sequence valve 20.
Fig. 2 is the structure principle chart that gas path device of the present invention is applied in actual gas circuit, and air is by being connected on the air inlet 21b of sequence valve 20 after filter 30 and check valve 40.
After adopting said structure and control method, by the opening and closing movement of the hand switch 11 to two-position three way mechanical valve 10, just switched path between two can be carried out to the open passageway of 3 in sequence valve 20.Therefore, gas path device structure of the present invention is simple, parts are few, easy to assembly, adopts control method of the present invention just can realize automatic switchover gas circuit by simple manual operation.
Claims (6)
1. a gas path device for pneumatic control switched path, is characterized in that: include:
Two-position three way mechanical valve, air inlet, air vent and common port that this two-position three way mechanical valve has hand switch and enters for control gas;
Sequence valve, this sequence valve has valve body, spool, flexible member, one end of valve body has interface channel, the one airtight slip in end of spool is located in this interface channel, the spaced apart oxygen inlet port being provided with the air inlet, gas outlet, the oxygen that enter for air and entering on valve body, flexible member is located between spool and valve body to make spool have back stretch, gas outlet between air inlet and oxygen inlet port, have between spool and valve body spool toward side slide put in place after seal the hermetically-sealed construction of oxygen inlet port and gas outlet gas circuit; Have between spool and valve body spool toward opposite side slide put in place after another hermetically-sealed construction of sealing air air inlet and gas outlet gas circuit;
After assembling, the common port of the interface channel on sequence valve and two-position three way mechanical valve is tightly connected.
2. according to the gas path device of a kind of pneumatic control switched path described in claim 1, it is characterized in that: the hermetically-sealed construction between described spool and valve body includes: the sealing block on spool, to be interposed between sealed wall between oxygen inlet port and gas outlet, after spool puts in place toward side slip under control gas effect, the sealing block shutoff on spool to be interposed between on the sealed wall between oxygen inlet port and gas outlet.
3. the gas path device of a kind of pneumatic control switched path according to claim 1 or 2, it is characterized in that: another hermetically-sealed construction between described spool and valve body includes: the sealing block on spool, to be interposed between another sealed wall between air inlet and gas outlet, after putting in place when sliding toward opposite side under the effect of spool at flexible member, the sealing block shutoff on spool to be interposed between on another sealed wall between air inlet and gas outlet.
4. according to the gas path device of a kind of pneumatic control switched path described in claim 3, it is characterized in that: described flexible member is spring.
5., according to the control method of the gas path device of a kind of pneumatic control switched path described in claim 1, it is characterized in that: include following steps:
The first step, opens the hand switch of two-position three way mechanical valve, opens air inlet and air inlet is communicated with common port, simultaneously by exhaust close;
Second step, controls gas and enters by common port the end that interface channel acts on spool, the elastic force that an end of spool overcomes flexible member under the driving controlling gas by spool before sliding is dynamic puts in place;
3rd step, spool makes air inlet be communicated with gas outlet, and meanwhile, spool blocks the connection between oxygen inlet port and gas outlet, and the air of air inlet is sent by gas outlet after the cavity in sequence valve.
6., according to the control method of the gas path device of a kind of pneumatic control switched path described in claim 5, it is characterized in that: also include,
4th step, closes the hand switch of two-position three way mechanical valve, closes air inlet and being communicated with between common port, and air vent is communicated with common port;
5th step, spool makes end adverse movement in interface channel of spool put in place under the elastic force effect of flexible member,
6th step, spool makes oxygen inlet port be communicated with gas outlet, and meanwhile, spool blocks the connection between air inlet and gas outlet, and the oxygen of oxygen inlet port is sent by gas outlet after the cavity in sequence valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210288001.1A CN102793960B (en) | 2012-08-14 | 2012-08-14 | Air path device for pneumatic control passage switching and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210288001.1A CN102793960B (en) | 2012-08-14 | 2012-08-14 | Air path device for pneumatic control passage switching and control method |
Publications (2)
| Publication Number | Publication Date |
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| CN102793960A CN102793960A (en) | 2012-11-28 |
| CN102793960B true CN102793960B (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210288001.1A Expired - Fee Related CN102793960B (en) | 2012-08-14 | 2012-08-14 | Air path device for pneumatic control passage switching and control method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182141B (en) * | 2011-12-30 | 2016-03-02 | 北京谊安医疗系统股份有限公司 | Two position three-way valve |
| CN105709318B (en) * | 2014-12-03 | 2018-02-02 | 深圳市科曼医疗设备有限公司 | Breathing equipment and its oxygen concentration testing agency |
| CN108705984A (en) * | 2018-08-17 | 2018-10-26 | 福建工程学院 | A kind of device and method of confined space fire prevention and anti-suffocation |
| CN109990131A (en) * | 2019-05-06 | 2019-07-09 | 特瑞斯能源装备股份有限公司 | A kind of high-precision self-operated two position three-way valve |
| CN113398397B (en) * | 2021-07-14 | 2022-03-25 | 北京易世恒电子技术有限责任公司 | Air flue exhaust device, expiratory valve equipment and breathing machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083052U (en) * | 1991-02-08 | 1991-08-21 | 航空航天工业部第一研究院第一设计部 | Switching unit of air supply system |
| US6427691B1 (en) * | 1999-07-09 | 2002-08-06 | Walter Jinotti | Medical valve |
| DE19934078B4 (en) * | 1999-07-15 | 2004-05-19 | Auergesellschaft Gmbh | Switching valve for a breathing apparatus |
| CN100506307C (en) * | 2006-10-23 | 2009-07-01 | 杨福生 | Ventilation proportion valve for respirator |
| CN101757713A (en) * | 2008-12-11 | 2010-06-30 | 北京谊安医疗系统股份有限公司 | Oxygen-air hybrid mechanism and breathing machine with the mechanism |
| CN102266617B (en) * | 2010-12-31 | 2014-02-26 | 北京谊安医疗系统股份有限公司 | Gas delivery device and anesthesia machine with same |
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