CN203719688U - Gas passage used for gas temperature and humidity test - Google Patents
Gas passage used for gas temperature and humidity test Download PDFInfo
- Publication number
- CN203719688U CN203719688U CN201320884822.1U CN201320884822U CN203719688U CN 203719688 U CN203719688 U CN 203719688U CN 201320884822 U CN201320884822 U CN 201320884822U CN 203719688 U CN203719688 U CN 203719688U
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- gas
- pipe line
- way solenoid
- solenoid valve
- gas outlet
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Abstract
The utility model discloses a gas passage used for a gas temperature and humidity test, and problems in the prior art that accuracy of a dew-point instrument straight-through type detection gas passage is reduced in the low humidity test can be overcome. The gas passage comprises a gas transmission pipeline, a sample introduction quick-change joint, a flow control regulating valve, two three-way electromagnetic valves, a temperature and humidity sensor probe gas chamber, a hollow drying cavity and an electron mass flow meter. A gas outlet o of the first three-way electromagnetic valve is connected with a gas inlet of the temperature and humidity sensor probe gas chamber. The gas outlet of the temperature and humidity sensor probe gas chamber is connected with the gas inlet a of the second three-way electromagnetic valve. The gas outlet o of the second three-way electromagnetic valve is connected with the gas inlet of the electron mass flow meter. The gas outlet p of the first three-way electromagnetic valve is connected with the gas outlet o of the second three-way electromagnetic valve and the gas inlet of the electron mass flow meter. The gas outlet p of the second three-way electromagnetic valve is connected with the drying cavity. Stabilization time of a temperature and humidity sensor can be effectively shortened by the technology, and thus detection time can be shortened.
Description
Technical field
This utility model relates to a kind of process of gas path to water cut test in gas, particularly relates to a kind of gas circuit for gas temperature humidity measurement.
Background technology
At present, micro-water content test for the gas of confined space, the common practice of every profession and trade is put or coagulated the water cut that frost point is converted gas by test gas condensation, and water cut in ambient atmosphere is conventionally very high, when sampling and testing, sample tap, joint, inner-walls of duct all can adsorb a certain amount of moisture, the water cut of the portion gas flowing out at first during sampling is higher, if led directly to into sensor probe air chamber, can affect response time and the accurate testing degree of sensor.The dew point hygrometer circulating on market adopts through-type process of gas path conventionally, directly sample gas is passed into sensor probe place air chamber, and emptying via bypass less than this first not being flowed out to the gas that partially aqueous amount is higher.And through-type process of gas path, temperature, humidity sensor probe are exposed in atmospheric environment for a long time, gas path pipe, sensor air chamber adsorbs more moisture, is difficult to remove when low humidity is tested.
Utility model content
The utility model has overcome in prior art, and dew point hygrometer adopts through-type detection gas circuit, and the problem that accuracy reduces when low humidity is tested provides a kind of simple in structure, convenient accurately for the gas circuit of gas temperature humidity measurement.
Technical solution of the present utility model is, provide a kind of gas circuit for gas temperature humidity measurement with following structure: contain gas pipe line, sample feeding hydraulic quick coupler, flow control regulating valve, the first three-way solenoid valve, Temperature Humidity Sensor probe air chamber, the second three-way solenoid valve, hollow drying chamber, electron mass flowmeter, rapid-acting coupling, sample feeding hydraulic quick coupler is by the air intake opening of gas pipe line connection traffic regulating and controlling valve, the gas outlet of flow control regulating valve connects the air intake opening a of the first three-way solenoid valve by gas pipe line, the gas outlet o of the first three-way solenoid valve connects the air intake opening of Temperature Humidity Sensor probe air chamber by gas pipe line, the gas outlet of Temperature Humidity Sensor probe air chamber connects the air intake opening a of the second three-way solenoid valve by gas pipe line, the gas outlet o of the second three-way solenoid valve is by the air intake opening of gas pipe line connecting electronic mass flowmeter, the gas outlet of electron mass flowmeter connects emptying air-path quick joint by gas pipe line, emptying air-path quick joint connects vacuum pump by gas pipe line, the gas outlet p of described the first three-way solenoid valve connects the gas outlet o of the second three-way solenoid valve and the air intake opening of electron mass flowmeter by gas pipe line, the gas outlet p of the second three-way solenoid valve connects drying chamber by gas pipe line.
Drying chamber is the hollow cavity that inside surface applies corrosion-resistant oxide covering, and inside surface is evenly filled with the drying medium of high adsorption.Flow control regulating valve is current limliting needle valve.
Compared with prior art; the utility model has the following advantages for the gas circuit of gas temperature humidity measurement: the utility model is switched and be filled with the utilization of the hollow cavity of drying medium by the path of two three-way solenoid valves; in the time of can avoiding the interior gas humidity test of confined space; the moisture of interface and pipe surface causes gas low humidity on the impact of measuring; effectively shorten the stabilization time of Temperature Humidity Sensor; thereby shorten detection time; saved test gas consumption; particularly, for the humidity measurement of some toxic and harmfuls, be more conducive to safety and environmental protection.
Accompanying drawing explanation
Fig. 1 is that the utility model is for the structural representation of the gas circuit of gas temperature humidity measurement.
Embodiment
In accompanying drawing explanation, label 1 is sample feeding hydraulic quick coupler, the 2nd, and flow control regulating valve, 3 is first three-way solenoid valves, the 4th, Temperature Humidity Sensor probe air chamber, 5 is second three-way solenoid valves, the 6th, drying chamber, the 7th, electron mass flowmeter, the 8th, emptying air-path quick joint, the 9th, vacuum pump.
Below in conjunction with the drawings and specific embodiments, to the utility model, the gas circuit for gas temperature humidity measurement is described further: a mouth of holding state---two three-way solenoid valves communicates with p mouth.Sample gas enters gas circuit from injection port, by flow control regulating valve 2, is adjusted to after proper flow rates, through bypass, is directly emptied in atmospheric environment, and this flow process, for sample gas scavenging pipeline, is removed the impact that the moisture in sample introduction gas circuit pipe causes test result; Temperature Humidity Sensor probe air chamber 4 now communicates with the drying chamber 6 that is filled with drying medium, and in sensor air chamber, moisture relies on diffusion, and the chamber 6 inner drying medium absorption that are dried, remain in the environment of a low humidity Temperature Humidity Sensor probe.
Sample introduction state---after sample gas purges totally by the moisture in pipeline, via two three-way solenoid valves, switch to sample introduction state, all a, o mouth communicate, sample gas passes into sensor probe air chamber, and sensor starts sample gas to test, when indicating value reach stable after, two three-way solenoid valves switch back holding state, sensor probe air chamber communicates with the drying chamber 6 that is filled with drying medium, and sensor restPoses, and waits for sample introduction next time.
Vacuum activating---according to testing time and the situation analysis of humidity measurement result, utilize 9 pairs of saturated drying mediums of vacuum pump to carry out low-temperature activation.The p mouth that is positioned at the second three-way solenoid valve 5 before drying chamber 6 communicates with o mouth, and vacuum pump 9 powers on, drying chamber 6 internal gas through the p mouth of the second three-way solenoid valve 5 and o mouth, electron mass flowmeter 7, vacuum pump 9, emptying rapid-acting coupling discharged to atmosphere; When drying chamber 6 inside are during in low pressure or subnormal ambient, the adsorptive power of drying medium declines, and the desorb of unnecessary H2O molecule is discharged atmosphere with extracting gas out, the adsorptive power of reduction drying agent.
The utility model is for the detection of power industry GIS equipment SF6 gas temperature humidity, embodiment contains gas pipe line, sample feeding hydraulic quick coupler 1, flow control regulating valve 2, the first three-way solenoid valve 3, Temperature Humidity Sensor probe air chamber 4, the second three-way solenoid valve 5, hollow drying chamber 6, electron mass flowmeter 7, rapid-acting coupling, sample feeding hydraulic quick coupler 1 is by the air intake opening of gas pipe line connection traffic regulating and controlling valve 2, the gas outlet of flow control regulating valve 2 connects the air intake opening a of the first three-way solenoid valve 3 by gas pipe line, the gas outlet o of the first three-way solenoid valve 3 connects the air intake opening of Temperature Humidity Sensor probe air chamber 4 by gas pipe line, the gas outlet of Temperature Humidity Sensor probe air chamber 4 connects the air intake opening a of the second three-way solenoid valve 5 by gas pipe line, the gas outlet o of the second three-way solenoid valve 5 is by the air intake opening of gas pipe line connecting electronic mass flowmeter 7, the gas outlet of electron mass flowmeter 7 connects emptying air-path quick joint 8 by gas pipe line, emptying air-path quick joint 8 connects vacuum pump 9 by gas pipe line, the gas outlet p of described the first three-way solenoid valve 3 connects the gas outlet o of the second three-way solenoid valve 5 and the air intake opening of electron mass flowmeter 7 by gas pipe line, the gas outlet p of the second three-way solenoid valve 5 connects drying chamber 6 by gas pipe line.
Wherein, the drying agent in drying chamber 6 is selected activated alumina and molecular sieve composite drying agent, dehydration depth H 2O content≤0.1ppm; SF6 gas is entered by sample feeding hydraulic quick coupler 1, from emptying air-path quick joint 8, goes out.
Described hollow cavity directly digs core and forms on square of aluminium alloy, and inside surface applies corrosion-resistant oxide covering, by opening hole on Al alloy block, is connected with the p mouth of the second three-way solenoid valve 5, inner evenly filling high adsorption drying medium.When communicating with sensor probe chamber, can Absorbing Sensor the excessive moisture of probe air chamber, keep the steady state (SS) of sensor probe air chamber in low humidity, when test sample gas, the interior sample gas of sensor air chamber will reach steady state (SS) fast, enter test like this.The internal coating of hollow cavity, especially for the oxidizable corrosion of metal Long contact time moisture, affects the defect in serviceable life and designs.Drying medium is the chemical characteristic of gas per sample, selects multiple water sucting medium not affecting in the physical property situation of sample gas.
The vacuum pump 9 in described exit, select stainless steel without oily piston type vacuum pump or without oily rotary-vane vaccum pump, environmental protection, noise are low, the low-temperature activation that vacuumizes for hollow cavity drying medium, when hollow cavity inside is during in low pressure or subnormal ambient, the adsorptive power of drying medium declines, the desorb of unnecessary H2O molecule, with extracting gas out, discharge atmosphere, the adsorptive power of reduction drying agent; The trouble of regular replacing drying agent is saved in vacuum pump 9 activation, and second also avoids the destruction of high-temperature activation (>100 ℃) to capacitance-resistance method sensor part of appliance.
Described two three-way solenoid valves carry out path break-make switching, and the multichannel flow process that realizes gas is switched; Flow control regulating valve 2 and electron mass flowmeter 7 are used in conjunction with flow velocity and the flow velocity demonstration of adjusting sample introduction gas; Sample feeding hydraulic quick coupler 1 and emptying air-path quick joint 8 pass into emptying fast for sample gas.
Claims (3)
1. the gas circuit for gas temperature humidity measurement, contain gas pipe line, sample feeding hydraulic quick coupler, flow control regulating valve, the first three-way solenoid valve, Temperature Humidity Sensor probe air chamber, the second three-way solenoid valve, hollow drying chamber, electron mass flowmeter, rapid-acting coupling, sample feeding hydraulic quick coupler is by the air intake opening of gas pipe line connection traffic regulating and controlling valve, the gas outlet of flow control regulating valve connects the air intake opening a of the first three-way solenoid valve by gas pipe line, the gas outlet o of the first three-way solenoid valve connects the air intake opening of Temperature Humidity Sensor probe air chamber by gas pipe line, the gas outlet of Temperature Humidity Sensor probe air chamber connects the air intake opening a of the second three-way solenoid valve by gas pipe line, the gas outlet o of the second three-way solenoid valve is by the air intake opening of gas pipe line connecting electronic mass flowmeter, the gas outlet of electron mass flowmeter connects emptying air-path quick joint by gas pipe line, emptying air-path quick joint connects vacuum pump by gas pipe line, it is characterized in that: the gas outlet p of described the first three-way solenoid valve connects the gas outlet o of the second three-way solenoid valve and the air intake opening of electron mass flowmeter by gas pipe line, the gas outlet p of the second three-way solenoid valve connects drying chamber by gas pipe line.
2. the gas circuit for gas temperature humidity measurement according to claim 1, is characterized in that: described drying chamber is the hollow cavity that inside surface applies corrosion-resistant oxide covering, and inside surface is evenly filled with the drying medium of high adsorption.
3. the gas circuit for gas temperature humidity measurement according to claim 1, is characterized in that: described flow control regulating valve is current limliting needle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884822.1U CN203719688U (en) | 2013-12-31 | 2013-12-31 | Gas passage used for gas temperature and humidity test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884822.1U CN203719688U (en) | 2013-12-31 | 2013-12-31 | Gas passage used for gas temperature and humidity test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203719688U true CN203719688U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320884822.1U Expired - Fee Related CN203719688U (en) | 2013-12-31 | 2013-12-31 | Gas passage used for gas temperature and humidity test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203719688U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319145A (en) * | 2014-07-30 | 2016-02-10 | 中国航空工业集团公司沈阳发动机设计研究所 | Continuous measuring method of humidity of high-speed medium-temperature negative-pressure air |
-
2013
- 2013-12-31 CN CN201320884822.1U patent/CN203719688U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319145A (en) * | 2014-07-30 | 2016-02-10 | 中国航空工业集团公司沈阳发动机设计研究所 | Continuous measuring method of humidity of high-speed medium-temperature negative-pressure air |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20201231 |