CN202149889U - Intelligent resistance-capacitance type dew point instrument with high precision - Google Patents
Intelligent resistance-capacitance type dew point instrument with high precision Download PDFInfo
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- CN202149889U CN202149889U CN201120255027U CN201120255027U CN202149889U CN 202149889 U CN202149889 U CN 202149889U CN 201120255027 U CN201120255027 U CN 201120255027U CN 201120255027 U CN201120255027 U CN 201120255027U CN 202149889 U CN202149889 U CN 202149889U
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Abstract
The utility model discloses an intelligent resistance-capacitance type dew point instrument with a high precision. The gas inlet of a cut-off valve of the dew point instrument is connected with a tested gas inlet; the gas outlet of a gas control valve controlling one-way conducting of gas is the exhaust port for the tested gas; a reduction valve and a humidity transducer are connected in series in a gas circuit between the gas outlet of the cut-off valve and the gas inlet of the gas control valve controlling the one-way conducting of gas; a signal output end of the humidity transducer is connected with the signal input end of a single chip; and the signal output end of the single chip is connected with a display. The dew point instrument has the advantages that the acceptable pressure range of the tested gas is broad, the test precision is high, the range of dew point detection is wide, the gas consumption is low, the dew point test balancing time is short, the required power is low, the volume is small, the weight is light, the mount is convenient, the use is safe and reliable, and the maintenance is simple;, besides, the gas control valve controlling the one-way conducting of gas is arranged to prevent external gas from flowing into the dew point instrument through an exhaust pipe to affect the test precision of the dew point instrument.
Description
Technical field
The utility model relates to the psychrometry technical field of measurement and test, is specifically related to a kind of intelligent high precision resistance-capacitance type dew point hygrometer.
Background technology
At present, progressively unified for gas humidity measurement and expression to dew point, promptly through the dew point of measurement gas, obtain the humidity of gas.The common method that is used to measure dew point has gravimetric method, Cold Mirrors method and capacitance-resistance method etc.Gravimetric method is to let tested gas stream through a certain drying agent, accurately measures moisture and tested gas volume that drying agent absorbs, and both are divided by and try to achieve the humidity of tested gas.The advantage of this method is that precision is high, and the limits of error can reach 0.1%; Shortcoming is relatively difficulties of concrete operations; Especially must obtain the quality (generally being not less than 0.6g) that the abundant agent that is dried absorbs; This has only the flow that strengthens tested gas just can measure humidity for low humidity gas especially difficulty, can cause Measuring Time and error to increase like this.Thereby this method only is suitable for measuring dew point for the gas more than-30 ℃, utilizes the instrument of this method humidity measuring less on the market merely.The Cold Mirrors method is to let tested gas stream through the minute surface of dew point Cold Mirrors chamber, through to the cooling of Cold Mirrors chamber, makes the tested gas dewfall (have drop to separate out on the Cold Mirrors minute surface this moment) that reaches capacity, and the temperature of measuring condensation mirror this moment is exactly the dew point of tested gas.The major advantage of this method is that precision is higher; Shortcoming is that response speed is slow, is below-60 ℃ the time at dew point especially, equilibration time even reach several hrs; And the method is very high to the corrosivity and the cleanliness requirement of tested gas; Otherwise can influence the Photoelectric Detection effect, even produce false knot dew, cause great measuring error.
The utility model content
The purpose of the utility model is to above-mentioned technical matters, provides a kind of measuring speed fast, and measuring accuracy is high, and can realize the intelligentized intelligent high precision resistance-capacitance type dew point hygrometer of measuring process.
For realizing this purpose; A kind of intelligent high precision resistance-capacitance type dew point hygrometer that the utility model designed; It is characterized in that: it comprises the gas control valve of single-chip microcomputer, display, stop valve, reduction valve, humidity transmitter and the unidirectional conducting of pilot-gas; Wherein, The air intake opening of said stop valve connects tested gas inlet, and the gas outlet of the gas control valve of the unidirectional conducting of said pilot-gas is tested gas exhaust port, series connection reduction valve and humidity transmitter on the gas circuit between the air intake opening of the gas control valve of the gas outlet of said stop valve and the unidirectional conducting of pilot-gas; The signal output part of said humidity transmitter connects the signal input part of single-chip microcomputer, and the signal output part of single-chip microcomputer connects display.
Preferably, it also comprises flowmeter and flow control valve, connect on the gas circuit between the air intake opening of the gas control valve of the gas outlet of said stop valve and the unidirectional conducting of pilot-gas reduction valve, flowmeter, flow control valve and humidity transmitter.
Preferably; The gas outlet of said stop valve connects the air intake opening of reduction valve; The air intake opening of the gas outlet connection traffic meter of reduction valve; The air intake opening of the gas outlet connection traffic variable valve of flowmeter, the gas outlet of flow control valve connects the air intake opening of humidity transmitter, and the gas outlet of humidity transmitter connects the air intake opening of the gas control valve of the unidirectional conducting of pilot-gas.
Preferably; The gas control valve of the unidirectional conducting of said pilot-gas is a pneumatic valve; The air intake opening of said pneumatic valve connects the gas outlet of humidity transmitter; The gas outlet of pneumatic valve is tested gas exhaust port, in the gas circuit between the gas outlet of the control end access stop valve of said pneumatic valve and the air intake opening of pneumatic valve.
Preferably, the gas control valve of the unidirectional conducting of said pilot-gas is a solenoid valve, and the air intake opening of said solenoid valve connects the gas outlet of humidity transmitter, and the gas outlet of solenoid valve is tested gas exhaust port, and the control end of said solenoid valve connects the control power supply.
Preferably, the gas control valve of the unidirectional conducting of said pilot-gas is a retaining valve, and the air intake opening of said retaining valve connects the gas outlet of humidity transmitter, and the gas outlet of said retaining valve is tested gas exhaust port.
Preferably, the gas control valve of the unidirectional conducting of said pilot-gas is a surplus valve, and the air intake opening of said surplus valve connects the gas outlet of humidity transmitter, and the gas outlet of said surplus valve is tested gas exhaust port.
Preferably; It also comprises box body and the drawer body that can in box body, flexibly connect, and the gas control valve of said single-chip microcomputer, display, stop valve, reduction valve, flowmeter, flow control valve, humidity transmitter and the unidirectional conducting of pilot-gas all is arranged on the drawer body.
Preferably, be connected with tensimeter between the air intake opening of the gas outlet of said stop valve and reduction valve.
Preferably, be connected with tensimeter between the air intake opening of the gas outlet of said reduction valve and flowmeter.
The principle of work of the utility model is: tested gas gets into the dew point hygrometer draft tube through behind the drying device, regulates reduction valve; Tested gaseous tension is reduced to about 0.1Mpa, regulate flow control valve, tested gas flow is adjusted to 1.0～1.5 liters/minute; After the ventilation; The gas control valve of the unidirectional conducting of pilot-gas in the dew point hygrometer is opened, and tested gas gets in the detection space of humidity transmitter, under the effect that is installed on the inner single-chip microcomputer of humidity transmitter; The humidity current corresponding value that records is delivered to LCDs show that LCDs dynamically shows dew point value continuously after single-chip microcomputer is handled.Gas after the measurement is discharged through gas control valve, gas outlet.After measuring end, reduction valve is closed in the dew point hygrometer outage, and this moment, gas control valve was closed automatically, prevented that ambient atmos from getting into dew point hygrometer through gas outlet.
The dew point of the mode measurement gas that the utility model use reduction valve, flow control valve, humidity transmitter combine; Make that the pressure limit of acceptable tested gas is wide by (0～40Mpa); The precision of measuring high (in ± 2 ℃), dew point sensing range wide (100～+ 20 ℃), air consumption little (1～1.5 liter/minute); Dew point measurement equilibration time weak point (when dew point is higher than-20 ℃ ,≤4 minutes; When dew point is-100 ℃～-20 ℃, about 8～10 minutes), power demand little (≤60W), volume is little, and is in light weight, easy for installation, safe and reliable, working service is simple.The dew point that can be used for all kinds of gases is measured the particularly measurement of high pressure low humidity gas dew point.In addition, can prevent that through the gas control valve that the unidirectional conducting of pilot-gas is set ambient atmos from getting into dew point hygrometer, influencing the measuring accuracy of dew point hygrometer through gas outlet.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 selects the structural representation of pneumatic valve for use for the utility model
Wherein, the gas control valve of 1-stop valve, 2-reduction valve, 3-humidity transmitter, 4-pneumatic valve, 5-single-chip microcomputer, 6-display, 7-flowmeter, 8-flow control valve, 9-tensimeter, the unidirectional conducting of 10-pilot-gas.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify:
A kind of intelligent high precision resistance-capacitance type dew point hygrometer as shown in Figure 1; It comprises the gas control valve 10 of single-chip microcomputer 5, display 6, stop valve 1, reduction valve 2, humidity transmitter 3 and the unidirectional conducting of pilot-gas; Wherein, The air intake opening of stop valve 1 connects tested gas inlet, and the gas outlet of the gas control valve 10 of the unidirectional conducting of pilot-gas is tested gas exhaust port, series connection reduction valve 2 and humidity transmitter 3 on the gas circuit between the air intake opening of the gas control valve 10 of the gas outlet of stop valve 1 and the unidirectional conducting of pilot-gas; The signal output part of humidity transmitter 3 connects the signal input part of single-chip microcomputer 5, and the signal output part of single-chip microcomputer 5 connects display 6.Above-mentioned humidity transmitter 3 is selected the DPM of Vaisala company series sensitive element for use, and promptly under the presence, real-time follow-up zero point drift, and utilize the correction of software automatic on-line has solved macromolecule membrane formula humicap and can not be used for low humidity and measure this difficult problem.Because the utility model that is arranged so that of above-mentioned reduction valve 2 can be measured the dew point of the gas in 0～40Mpa pressure limit, and conventional dew point hygrometer import goes out to be mostly atmosphere gas.Humidity transmitter 3 is exported corresponding electric current according to moisture in the tested gas, after single-chip microcomputer 5 is handled, on LCDs, shows dew point value.Above-mentioned gas operation valve 10 is used to control the break-make of gas outlet, opens automatically when air inlet is arranged, automatic cutout during no air inlet.
In the technique scheme, it also comprises flowmeter 7 and flow control valve 8, series connection reduction valve 2, flowmeter 7, flow control valve 8 and humidity transmitter 3 on the gas circuit between the air intake opening of the gas control valve 10 of the gas outlet of stop valve 1 and the unidirectional conducting of pilot-gas.The concrete connected mode of the said equipment is the air intake opening that the gas outlet of stop valve 1 connects reduction valve 2; The air intake opening of the gas outlet connection traffic meter 7 of reduction valve 2; The air intake opening of the gas outlet connection traffic variable valve 8 of flowmeter 7; The gas outlet of flow control valve 8 connects the air intake opening of humidity transmitter 3, and the gas outlet of humidity transmitter 3 connects the air intake opening of the gas control valve 10 of the unidirectional conducting of pilot-gas.Above-mentioned flow control valve 8 is regulated the flow that gets into the tested gas in the humidity transmitter 3, makes it to reach the job requirement of humidity transmitter.Flowmeter 7 is used for the flow of the tested gas of monitored pipeline
In the technique scheme; The gas control valve 10 of the unidirectional conducting of said pilot-gas can be pneumatic valve 4; The air intake opening of pneumatic valve 4 connects the gas outlet of humidity transmitter 3; The gas outlet of pneumatic valve 4 is tested gas exhaust port, in the gas circuit between the gas outlet of the control end access stop valve 1 of pneumatic valve 4 and the air intake opening of pneumatic valve 4.
The gas control valve 10 of the unidirectional conducting of above-mentioned pilot-gas can be solenoid valve, and the air intake opening of solenoid valve connects the gas outlet of humidity transmitter 3, and the gas outlet of solenoid valve is tested gas exhaust port, and the control end of said solenoid valve connects the control power supply.
The gas control valve 10 of the unidirectional conducting of above-mentioned pilot-gas also can be retaining valve, and the air intake opening of retaining valve connects the gas outlet of humidity transmitter 3, and the gas outlet of said retaining valve is tested gas exhaust port.
The gas control valve 10 of the unidirectional conducting of above-mentioned pilot-gas can also be surplus valve, and the air intake opening of surplus valve connects the gas outlet of humidity transmitter 3, and the gas outlet of said surplus valve is tested gas exhaust port.
The erection sequence of the flowmeter 7 in the said apparatus, flow control valve 8, humidity transmitter 3 can arbitrarily be arranged in pairs or groups.
In the technique scheme; It also comprises box body and the drawer body that can in box body, flexibly connect, and the gas control valve 10 of single-chip microcomputer 5, display 6, stop valve 1, reduction valve 2, flowmeter 7, flow control valve 8, humidity transmitter 3 and the unidirectional conducting of pilot-gas all is arranged on the drawer body.Be connected with tensimeter 9 between the air intake opening of the gas outlet of said stop valve 1 and reduction valve 2, this tensimeter 9 is a blowout-back pressure gauge.Be connected with tensimeter 9 between the air intake opening of the gas outlet of reduction valve 2 and flowmeter 7, this tensimeter 9 is a low pressure gauge.Above-mentioned two tensimeters 9 are in order to show the height atmospheric pressure value of tested gas decompression front and back.
In the technique scheme, the supply voltage of dew point hygrometer is 220 ± 20V, 50Hz, and power module is equipped with in inside, to single-chip microcomputer 5, LCDs, humidity transmitter 3 power supplies.
The course of work of the utility model is: tested gas gets into dew point hygrometer through draft tube, and reducing pressure into pressure through reduction valve 2 secondaries is an atmospheric gas.Gas continues to move ahead, and after flow control valve 8 is regulated, shows that in flowmeter 7 pipelines flow is 1～1.5 liter/minute.Gas continues to move ahead, and enters into humidity transmitter 3, and humidity transmitter 3 is exported corresponding current value according to humidity value, after single-chip microcomputer 5 is handled, on LCDs, shows dew point value.Gas continues to move ahead, and behind gas control valve, arrives gas outlet and discharges.When air inlet was arranged, gas control valve was opened automatically, and during no air inlet, gas control valve is closed automatically.On the dew point hygrometer shell power switch is installed, power power-supply module is equipped with in inside, to humidity transmitter, single-chip microcomputer, LCDs power supply.The utility model also comprises box body and drawer body, and drawer body can slide along the inboard wall of cartridge slideway, and both can use 4 screw retention.
The content that this instructions is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (10)
1. intelligent high precision resistance-capacitance type dew point hygrometer; It is characterized in that: it comprises the gas control valve (10) of single-chip microcomputer (5), display (6), stop valve (1), reduction valve (2), humidity transmitter (3) and the unidirectional conducting of pilot-gas; Wherein, The air intake opening of said stop valve (1) connects tested gas inlet; The gas outlet of the gas control valve (10) of the unidirectional conducting of said pilot-gas is tested gas exhaust port; Connect on the gas circuit between the air intake opening of the gas control valve (10) of the gas outlet of said stop valve (1) and the unidirectional conducting of pilot-gas reduction valve (2) and humidity transmitter (3), the signal output part of said humidity transmitter (3) connects the signal input part of single-chip microcomputer (5), and the signal output part of single-chip microcomputer (5) connects display (6).
2. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 1; It is characterized in that: it also comprises flowmeter (7) and flow control valve (8), connect on the gas circuit between the air intake opening of the gas control valve (10) of the gas outlet of said stop valve (1) and the unidirectional conducting of pilot-gas reduction valve (2), flowmeter (7), flow control valve (8) and humidity transmitter (3).
3. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 2; It is characterized in that: the gas outlet of said stop valve (1) connects the air intake opening of reduction valve (2); The air intake opening of the gas outlet connection traffic meter (7) of reduction valve (2); The air intake opening of the gas outlet connection traffic variable valve (8) of flowmeter (7), the gas outlet of flow control valve (8) connects the air intake opening of humidity transmitter (3), and the gas outlet of humidity transmitter (3) connects the air intake opening of the gas control valve (10) of the unidirectional conducting of pilot-gas.
4. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 3; It is characterized in that: the gas control valve (10) of the unidirectional conducting of said pilot-gas is a pneumatic valve (4); The air intake opening of said pneumatic valve (4) connects the gas outlet of humidity transmitter (3); The gas outlet of pneumatic valve (4) is tested gas exhaust port, in the gas circuit between the gas outlet of the control end access stop valve (1) of said pneumatic valve (4) and the air intake opening of pneumatic valve (4).
5. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 3; It is characterized in that: the gas control valve (10) of the unidirectional conducting of said pilot-gas is a solenoid valve; The air intake opening of said solenoid valve connects the gas outlet of humidity transmitter (3); The gas outlet of solenoid valve is tested gas exhaust port, and the control end of said solenoid valve connects the control power supply.
6. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 3; It is characterized in that: the gas control valve (10) of the unidirectional conducting of said pilot-gas is a retaining valve; The air intake opening of said retaining valve connects the gas outlet of humidity transmitter (3), and the gas outlet of said retaining valve is tested gas exhaust port.
7. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 3; It is characterized in that: the gas control valve (10) of the unidirectional conducting of said pilot-gas is a surplus valve; The air intake opening of said surplus valve connects the gas outlet of humidity transmitter (3), and the gas outlet of said surplus valve is tested gas exhaust port.
8. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 2; It is characterized in that: it also comprises box body and the drawer body that can in box body, flexibly connect, and the gas control valve (10) of said single-chip microcomputer (5), display (6), stop valve (1), reduction valve (2), flowmeter (7), flow control valve (8), humidity transmitter (3) and the unidirectional conducting of pilot-gas all is arranged on the drawer body.
9. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 3, it is characterized in that: be connected with tensimeter (9) between the air intake opening of the gas outlet of said stop valve (1) and reduction valve (2).
10. according to the said intelligent high precision resistance-capacitance type dew point hygrometer of claim 3, it is characterized in that: be connected with tensimeter (9) between the air intake opening of the gas outlet of said reduction valve (2) and flowmeter (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120255027U CN202149889U (en) | 2011-07-19 | 2011-07-19 | Intelligent resistance-capacitance type dew point instrument with high precision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120255027U CN202149889U (en) | 2011-07-19 | 2011-07-19 | Intelligent resistance-capacitance type dew point instrument with high precision |
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| CN202149889U true CN202149889U (en) | 2012-02-22 |
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| CN201120255027U Expired - Fee Related CN202149889U (en) | 2011-07-19 | 2011-07-19 | Intelligent resistance-capacitance type dew point instrument with high precision |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777190A (en) * | 2015-04-13 | 2015-07-15 | 南京祥源动力供应有限公司 | Online detection device for compressed air humidity |
| CN109813756A (en) * | 2019-02-01 | 2019-05-28 | 中国石油天然气集团公司 | A kind of method of gas pipeline water dew point on-line real-time measuremen |
| CN109856186A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
| CN110940700A (en) * | 2018-09-25 | 2020-03-31 | 山东爱索能源科技有限公司 | Integrated gas circuit for installing dew point instrument |
-
2011
- 2011-07-19 CN CN201120255027U patent/CN202149889U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777190A (en) * | 2015-04-13 | 2015-07-15 | 南京祥源动力供应有限公司 | Online detection device for compressed air humidity |
| CN104777190B (en) * | 2015-04-13 | 2017-08-29 | 南京祥源动力供应有限公司 | A kind of on-line water flushing device of compressed air humidity |
| CN110940700A (en) * | 2018-09-25 | 2020-03-31 | 山东爱索能源科技有限公司 | Integrated gas circuit for installing dew point instrument |
| CN109813756A (en) * | 2019-02-01 | 2019-05-28 | 中国石油天然气集团公司 | A kind of method of gas pipeline water dew point on-line real-time measuremen |
| CN109856186A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
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| 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: 20120222 Termination date: 20160719 |
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| CF01 | Termination of patent right due to non-payment of annual fee |