CN205027578U - Gas accuse two -position three way sampling valve - Google Patents
Gas accuse two -position three way sampling valve Download PDFInfo
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- CN205027578U CN205027578U CN201520776327.8U CN201520776327U CN205027578U CN 205027578 U CN205027578 U CN 205027578U CN 201520776327 U CN201520776327 U CN 201520776327U CN 205027578 U CN205027578 U CN 205027578U
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Abstract
The utility model discloses a gas accuse two -position three way sampling valve, include: valve body, valve body have the through -hole, are provided with the second gas pocket interface with this through -hole intercommunication on the lateral wall of one end for first gas pocket interface and valve body of this through -hole, have the valve barrel of the tubular structure of central through -hole, be provided with the third gas pocket interface that communicates with this central authorities' through -hole on this valve barrel lateral wall, and the one end nestification of valve barrel is in the other end of valve body, cylinder mouth and valve barrel with the cylinder that the relative other end of one end is connected, the one end setting of piston is in order splitting into the cylinder two volume variable cavities in the cylinder, and is provided with the fourth gas pocket on the cavity wall of the actinal cavity of cylinder, and the other end of piston passes in cylinder mouth and valve barrel stretch into the central through -hole of valve body, and the piston the other end can be to the valve barrel one end and first gas pocket interface form sealedly. This sampling valve has simple structure, small, light in weight's advantage to easily change the air feed state.
Description
Technical field
The utility model relates to valve field, more specifically, relates to a kind of gas control two-position three way sampling valve.
Background technology
The sampling of gas analysis instrument not only will gather gas to be measured, sometimes also needs to gather surrounding air around or specific calibrating gas.Common treating method is use two two position two-way valves composition valve systems, closes one during sampled measurements, then opens another and carry out pumped (conveying) medium, otherwise during sampling zeroing.But when gas analysis instrument has blowing function, sampling probe is fixedly mounted in sealed high pressure pipeline, then probably because pressure differential causes blowing function to lose efficacy.Above situation uses a two position three-way valve just can solve, and system architecture can be made more simply compact, install and use more convenient.But direct-acting type two-position three-way valve mostly on the market is solenoid valve; contamination resistance is not strong; medium as circulation is that temperature is higher and containing the dusty gas of a large amount of particle, mist of oil and other chemical compositions diesel motor exhaust; then spool usually can contaminatedly block; lose sealing, or be corroded and run improperly.And the general volume of valve that anti-pollution, resistant to elevated temperatures chemical pipeline use is excessive, be inconvenient to be used on external sampling pipe.In addition, sampling probe when instrument outside and apart from each other with instrument, the operation circuit extending solenoid valve is obviously unrealistic, there is the problem of safety problem and signal line loss.
Utility model content
For solving the problems of the technologies described above, the utility model discloses a kind of gas control two-position three way sampling valve, this gas control two-position three way sampling valve comprises:
Valve body, valve body has through hole, and one end of through hole is the first pore interface, the sidewall of valve body is provided with the second pore interface be communicated with through hole;
Valve pocket, valve pocket is the tubular structure with center through hole, and the sidewall of valve pocket is provided with the 3rd pore interface be communicated with center through hole, and one end of valve pocket is nested in the other end of valve body;
Cylinder, the cylinder port of cylinder is connected with the other end of the relative with described one end of valve pocket; With
Piston, one end of piston is arranged in cylinder cylinder to be divided into two variable-volume cavitys, and on the cavity wall of the cavity of cylinder port side, be provided with the 4th pore, the other end of piston extend in the center through hole of valve pocket through cylinder port and valve pocket, and the described other end of piston can form sealing to described one end of valve pocket and the first pore interface.
In an embodiment of the present utility model, piston comprises:
Cylinder piston, one end of cylinder piston to be arranged in cylinder cylinder to be divided into the cavity of two variable-volume, the other end stretches out cylinder through cylinder port;
Piston rod, piston rod is arranged in valve pocket, and one end of piston rod is connected with the described other end of cylinder piston; With
Piston head, piston head is connected with the other end of piston rod by bolt, and is provided with spacer for bolt between bolt and piston head.
In an embodiment of the present utility model, in cylinder, be provided with back-moving spring, back-moving spring one end is connected with the cylinder wall relative with cylinder port of cylinder, the other end is connected with cylinder piston.
In an embodiment of the present utility model, one end that valve pocket and cylinders connect has the larger center through hole of internal diameter, one end that valve pocket is connected with valve body has the less center through hole of internal diameter, make that cylinder piston can stretch in the center through hole that internal diameter is larger, piston rod can stretch in the center through hole that internal diameter is less, and the housing portion with the less center through hole of internal diameter extend in valve body.
In an embodiment of the present utility model, the junction of valve pocket and cylinder and valve body is provided with O-ring seal.
In an embodiment of the present utility model, piston head can seal one end that valve pocket is deep in valve body.
In an embodiment of the present utility model, the inwall of the 3rd pore interface is provided with screw thread, and the 3rd pore interface sides is provided with adjustment hole.
In an embodiment of the present utility model, valve body is connected with valve pocket by installing screw.
The making material that gas control two-position three way sampling valve provided by the utility model uses is the material of high temperature resistant, resistance to tail gas corrosion, so serviceable life is longer, and have that structure is simple, volume is little, lightweight advantage, be convenient to be used on external sampling pipe.
Accompanying drawing explanation
Above-mentioned and other side of the present utility model and feature present from below in conjunction with accompanying drawing the explanation of embodiment is clear, wherein:
Fig. 1 is the structural representation of gas control two-position three way sampling valve under align mode according to the utility model embodiment, and wherein the direction of arrow is gas flow direction;
Fig. 2 is the structural representation of gas control two-position three way sampling valve under sample states according to the utility model embodiment, and wherein the direction of arrow is gas flow direction; With
Fig. 3 is the stereographic map of the gas control two-position three way sampling valve according to the utility model embodiment.
Embodiment
Describe illustrative, non-limiting example of the present utility model with reference to the accompanying drawings in detail, be further described according to gas control two-position three way sampling valve of the present utility model.
With reference to Fig. 1 and 2, the gas control two-position three way sampling valve according to the utility model embodiment comprises: valve body 1, valve pocket 2, cylinder 3 and piston (cylinder piston 41, piston rod 42 and piston head 43).
Valve body 1 has through hole, and one end of this through hole is the first pore interface 11, and on the sidewall of valve body, be provided with the second pore interface 12 be communicated with through hole.In one embodiment, first pore interface 11 is connected with gas to be detected, second pore interface 12 is connected with gas-detecting device, makes the gas to be detected passed into from the first pore interface 11 enter gas-detecting device from the second pore interface 12 and detects.
Valve pocket 2 for having the tubular structure of center through hole, and is provided with the 3rd pore interface 21 be communicated with this center through hole on the sidewall of valve pocket 2.One end of valve pocket 2 is nested in the other end of valve body 1, and the 3rd pore interface 21 can be connected with valve body 1 further.In one embodiment, air or other gas can be passed into from the 3rd pore interface 21, and when the 3rd pore interface 21 is communicated with the second pore interface 12, the air entered from the 3rd pore interface 21 or other gas pass into gas-detecting device by the second pore interface 12, thus the detection that can gas-detecting device is carried out calibration operation or be carried out other gases.Preferably, as shown in Figure 3, valve body 1 and valve pocket 2 are installed screw 13 (all do not illustrate four in figure and install screw) by four and are connected.
The cylinder port of cylinder 3 is connected with the other end of the relative with one end that valve body 1 is connected of valve pocket 2.One end of piston is arranged in cylinder 3 cylinder 3 to be divided into the cavity of two variable-volume, and the cavity wall of the cavity formed in described one end and the cylinder port of piston is provided with the 4th pore the 31, four pore 31 move to cylinder 3 bottom surface with described one end of compression piston for passing into gas in cylinder 3.The other end relative with the one end be arranged in cylinder 3 of piston 3 extend in the center through hole of valve pocket 2 through cylinder port and valve pocket 2, and the described other end of this piston can extend into the one end in valve body 1 to valve pocket 2 and the first pore interface on valve body 1 forms sealing.
In above-mentioned gas control two-position three way sampling valve: when the described other end of piston seals the first pore interface 11, second pore interface 12 is communicated with the 3rd pore interface 21, the air entered from the 3rd pore interface 21 or other gas enter gas-detecting device through the second pore interface 12, thus demarcate gas-detecting device or carry out the detection to other gases; When the described other end of piston seals valve pocket 2 one end extend in valve body 1, first pore interface 11 and the second pore interface 12 are connected, the gas to be detected entered from the first pore interface 11 enters gas-detecting device from the second pore interface 12, thus detects this gas to be detected.Can be known by said process, this gas control two-position three way sampling valve has simple, the compact advantage of structure, is convenient to the align mode and the detected state that adjust gas-detecting device, can also connect two kinds of gases to be measured respectively and select to detect.
Continue with reference to Fig. 1 and 2, piston comprises cylinder piston 41, piston rod 42 and piston head 43.One end of cylinder piston 41 to be arranged in cylinder 3 cylinder 3 to be divided into the cavity of two variable-volume, the other end stretches out cylinder 3 through cylinder port.Piston rod 42 is arranged in valve pocket 2, and one end of piston rod 42 is connected to form linkage structure with cylinder piston 41 with the described other end of cylinder piston 41.Piston head 43 is connected with the other end relative with described one end of this piston rod 42 of piston rod 42 by piston bolt 44, and arranges spacer for bolt between piston bolt 44 and piston head 43.The Packed effect of piston head 43 tool, namely, this piston head 43 can seal the first pore interface 11 and be communicated with the 3rd pore interface 21 to make the second pore interface 12, or sealing the 3rd pore interface 21 is communicated with the first pore interface 11 to make the second pore interface 12.This simple connection and air-tight manner make the duty being easy to change this gas control two-position three way sampling valve.
Further, in cylinder 3, be provided with back-moving spring 32, one end of back-moving spring 32 is connected with the cylinder wall relative with cylinder port of cylinder 3, the other end is connected with cylinder piston 41.This back-moving spring 32, for producing elastic force to cylinder piston 41, promotes cylinder piston 41 and moves to cylinder port place.
The course of work of cylinder 3 and piston is described: when gas-detecting device is calibrated below in conjunction with above-mentioned 4th pore 31, close the 4th pore 31, cylinder piston 41 moves to valve body 1 direction under the promotion of back-moving spring 32, cylinder piston 41 promotes piston rod 42 further, the piston head 43 on piston rod 42 is made to move to close the first pore interface 11 to the first pore interface 11 place, now, second pore interface 12 is communicated with the 3rd pore interface 21, and air or other gas enter gas-detecting device from the 3rd pore interface 21 and the second pore interface 12, when using gas-detecting device to detect gas to be detected, open the 4th pore 31, gas is passed into the cavity formed between cylinder piston 41 and cylinder port, enter the gas compression cylinder piston 41 of this cavity, cylinder piston 41 is moved to the direction away from valve body 1, and then drive piston head 43 to leave the first pore interface 11 and close valve pocket 2 and stretch into one end in valve body 1, thus the path of the second pore interface 12 and the 3rd pore interface 21 is sealed, first pore interface 11 is communicated with the second pore interface 12, gas to be detected enters gas-detecting device via the first pore interface 11 and the second pore interface 12.
Further, one end that one end that valve pocket 2 is connected with cylinder 3 has the larger center through hole of internal diameter, valve pocket 2 is connected with valve body 1 has the less center through hole of internal diameter, make that cylinder piston 41 can stretch in the center through hole that internal diameter is larger, piston rod 42 can stretch in the center through hole that internal diameter is less, and valve pocket 2 part with the less center through hole of internal diameter extend in valve body 1.Preferably, valve pocket 2 is provided with O-ring seal 5 with the junction of cylinder 3, makes the gas entering cylinder 3 from the 4th pore can be sealed in cylinder 3, improve the compression efficiency of gas.Valve pocket 2 is also provided with O-ring seal 5 with the junction of valve body 1, make the air that passes into from the 3rd pore interface 21 or other gas can enter the 4th pore interface 31 No leakage, and can ensure can control the flow velocity of the gas that the 4th pore interface 31 passes into and flow, to improve calibration accuracy.
Further, the inwall of the 3rd pore interface 21 is provided with screw thread, and the side of the 3rd pore interface 21 is provided with adjustment hole.To during by the 3rd pore interface 21 input air, bolt can be screwed in the screw thread in the 3rd pore interface 21, the flow of the air entering the 3rd pore interface 21 can be regulated by the spinning in and out of adjusting bolt.When inputting other gases by the 3rd pore interface 21, by bolt back-out and by tube socket to the 3rd pore interface 21 to root.This method of attachment has advantage simple to operation.
Although be illustrated exemplary embodiments of the present utility model, but obviously it will be appreciated by those skilled in the art that, can change when not deviating from spirit of the present invention and principle, its scope limits in claims and its equivalent.
Claims (8)
1. a gas control two-position three way sampling valve, is characterized in that, comprising:
Valve body, described valve body has through hole, and one end of described through hole is the first pore interface, the sidewall of described valve body is provided with the second pore interface be communicated with described through hole;
Valve pocket, described valve pocket is the tubular structure with center through hole, and the sidewall of described valve pocket is provided with the 3rd pore interface be communicated with described center through hole, and one end of described valve pocket is nested in the other end of described valve body;
Cylinder, the cylinder port of described cylinder is connected with the other end of the relative with described one end of described valve pocket; With
Piston, one end of described piston is arranged in described cylinder described cylinder to be divided into the cavity of two variable-volume, and on the cavity wall of the cavity of described cylinder port side, be provided with the 4th pore, the other end of described piston extend in the described center through hole of described valve pocket through described cylinder port and described valve pocket, and the described other end of described piston can form sealing to described one end of described valve pocket and described first pore interface.
2. gas control two-position three way sampling valve according to claim 1, it is characterized in that, described piston comprises:
Cylinder piston, one end of described cylinder piston to be arranged in described cylinder described cylinder to be divided into the cavity of two variable-volume, the other end stretches out described cylinder through described cylinder port;
Piston rod, described piston rod is arranged in described valve pocket, and one end of described piston rod is connected with the described other end of described cylinder piston; With
Piston head, described piston head is connected by the other end of bolt with described piston rod, and is provided with spacer for bolt between described bolt and described piston head.
3. gas control two-position three way sampling valve according to claim 2, it is characterized in that, be provided with back-moving spring in described cylinder, one end of described back-moving spring is connected with the cylinder wall of the relative with described cylinder port of described cylinder, the other end is connected with described cylinder piston.
4. gas control two-position three way sampling valve according to claim 2, it is characterized in that, one end that described valve pocket and described cylinders connect has the larger center through hole of internal diameter, one end that described valve pocket is connected with described valve body has the less center through hole of internal diameter, make that described cylinder piston can stretch in the center through hole that described internal diameter is larger, described piston rod can stretch in the center through hole that described internal diameter is less, and the housing portion with the less center through hole of described internal diameter extend in described valve body.
5. gas control two-position three way sampling valve according to claim 4, it is characterized in that, the junction of described valve pocket and described cylinder and described valve body is provided with O-ring seal.
6. gas control two-position three way sampling valve according to claim 2, is characterized in that, described piston head can seal one end that described valve pocket is deep in described valve body.
7. gas control two-position three way sampling valve according to claim 1, is characterized in that, the inwall of described 3rd pore interface is provided with screw thread, and described 3rd pore interface sides is provided with adjustment hole.
8. gas control two-position three way sampling valve according to claim 1, is characterized in that, described valve body is connected with described valve pocket by installing screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520776327.8U CN205027578U (en) | 2015-09-30 | 2015-09-30 | Gas accuse two -position three way sampling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520776327.8U CN205027578U (en) | 2015-09-30 | 2015-09-30 | Gas accuse two -position three way sampling valve |
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| Publication Number | Publication Date |
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| CN205027578U true CN205027578U (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520776327.8U Active CN205027578U (en) | 2015-09-30 | 2015-09-30 | Gas accuse two -position three way sampling valve |
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| CN (1) | CN205027578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632403A (en) * | 2018-12-06 | 2019-04-16 | 成都华科阀门制造有限公司 | A kind of gas collecting device |
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2015
- 2015-09-30 CN CN201520776327.8U patent/CN205027578U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632403A (en) * | 2018-12-06 | 2019-04-16 | 成都华科阀门制造有限公司 | A kind of gas collecting device |
| CN109632403B (en) * | 2018-12-06 | 2024-02-06 | 成都华科阀门制造有限公司 | Gas collection device |
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