A kind of air pressure controllable type one-way cockTechnical field
This utility model belongs to field of mechanical technique, is related to a kind of valve, particularly to a kind of air pressure controllable type check valveDoor.
Background technology
Valve is in fluid system, for control the direction of fluid, pressure, flow device be to make in pipe arrangement and equipmentMedia flow or stop and can control the device of its flow.Although the valve being used on the market at present in air compressor system someAlso there is return-stopping function, but its structure is typically all to pass through to install pin rod and diaphragm realization in valve body, when trachea internal gas pressure reducesWhen it is impossible to effectively realize the function of medium fluid stopping, to produce bring certain inconvenience.
Content of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, there is provided a kind of structure is simple and pressesThe controlled one-way cock of power.
The purpose of this utility model can be realized by following technical proposal: a kind of air pressure controllable type one-way cock, includingValve body, cavity structure centered on described valve body, the two ends of described valve body are respectively arranged with fixed seat, and described fixed seat setsIt is equipped with symmetrical location hole, it is characterised in that offering in described valve body, o type circle, institute are provided with draw-in groove and draw-in grooveThe vavle shelf of fixation is provided with the o type circle stated, described vavle shelf one end is resisted against the o type circle other end and is located at valve outletPlace is positioned by snap ring and fixes, and the stage casing of described vavle shelf is fixed with valve seat, is provided with valve element between described valve seat and o type circle,Described valve element pass through spring against with o type circle on.
The principle of this air valve controllable type one-way cock is: gas medium enters from body base, when air pressure is more than springDuring elastic force, by valve element jack-up, valve turns on gas, if trachea internal gas pressure reduces the elastic force less than spring, valve element passes through elastic forceIt is resisted against and is sealed on o type circle, valve ends, as long as therefore by being set to the elastic force of spring it is possible to effectivelyControl endotracheal air pressure.
In a kind of above-mentioned air pressure controllable type one-way cock, between described snap ring and valve body, it is provided with sealing ring.
In a kind of above-mentioned air pressure controllable type one-way cock, described valve element and o type circle are arcuate structure against place.ThisThe design of structure makes its one-way sealing effect better.
Compared with prior art, this air pressure controllable type one-way cock have that structure simple seal is good and pressure controllable excellentPoint.
Brief description
Fig. 1 is the sectional view of this air pressure controllable type one-way cock.
In figure, 1, valve body；2nd, fixed seat；3rd, location hole；4th, o type circle；5th, vavle shelf；6th, snap ring；7th, valve seat；8th, valve element；9、Spring；10th, sealing ring.
Specific embodiment
The following is specific embodiment of the utility model and combine accompanying drawing, the technical solution of the utility model is made furtherDescription, but this utility model is not limited to these embodiments.
As shown in figure 1, this air pressure controllable type one-way cock includes valve body 1, cavity structure centered on valve body 1, the two of valve body 1End is respectively arranged with fixed seat 2, fixed seat 2 is provided with symmetrical location hole 3, offers draw-in groove and draw-in groove in valve body 1On be provided with o type circle 4, o type circle 4 has been provided with the vavle shelf 5 of fixation, vavle shelf 5 one end is resisted against o type circle 4 other end positionPass through snap ring 6 positioning in valve body 1 exit to fix, the stage casing of vavle shelf 5 is fixed with valve seat 7, is provided between valve seat 7 and o type circle 4Valve element 8, valve element 8 pass through spring 9 against with o type circle 4 on.
Describe in detail further, between snap ring 6 and valve body 1, be provided with sealing ring 10, valve element 8 and o type circle 4 are arc knot against placeStructure.
Specific embodiment described herein is only explanation for example to this utility model spirit.This utility model instituteBelong to those skilled in the art described specific embodiment can be made with various modifications or supplement or using similarMode substitute, but without departing from of the present utility model spirit or surmount scope defined in appended claims.
Although more employing valve body 1, fixed seat 2, location hole 3, o type circle 4, vavle shelf 5, snap ring 6, valve seat 7, valve hereinThe terms such as core 8, spring 9, sealing ring 10, but it is not precluded from the probability using other terms.Using these terms it is onlyMore easily describe and explain essence of the present utility model；Being construed as any additional restriction is and this reality allContrary with new spirit.