CN203011494U - Pneumatic liquid adding verification device for float type liquid level sensor - Google Patents
Pneumatic liquid adding verification device for float type liquid level sensor Download PDFInfo
- Publication number
- CN203011494U CN203011494U CN 201220619441 CN201220619441U CN203011494U CN 203011494 U CN203011494 U CN 203011494U CN 201220619441 CN201220619441 CN 201220619441 CN 201220619441 U CN201220619441 U CN 201220619441U CN 203011494 U CN203011494 U CN 203011494U
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- valve
- level sensor
- liquid level
- communicated
- float type
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Abstract
The utility model discloses a pneumatic liquid adding verification device for a float type liquid level sensor, which comprises a sampling tube provided with the float type liquid level sensor, a liquid storage tube, a pressure reducing valve, an isolating valve, a first check valve, a second check valve, a two-position three-way reversal valve, a first pressure gage and a second pressure gage, wherein the pressure reducing valve is sequentially connected with the isolating valve; an output end of the isolating valve is communicated with the top of the liquid storage tube; the first pressure gage is arranged between the pressure reducing valve and the isolating valve; an output end of the first check valve is communicated with the bottom of the liquid storage tube, and an input end is communicated with the bottom of the sampling tube; an input end of the second check valve is communicated with the middle of the liquid storage tube, and the output end is communicated with the bottom of the sampling tube; an input end of the second check valve is communicated with the top of the sampling tube through the two-position three-way reversal valve; and the second pressure gage is arranged at the bottom of the sampling tube. The verification device facilitates the implementation of the verification operation of the float type liquid level sensor, overcomes the defects of traditional verification modes, improves the verification accuracy and the precision of the sensor, and avoids the influence on the environment in a verification process.
Description
Technical field
The utility model relates to the pneumatic liquid feeding calibration equipment of a kind of float type liquid level sensor.
Background technology
In automation control area, the measurement of liquid level and control are the key factors that guarantees production continuously and device security.The form of level gauging is according to the difference of survey object and difference, and float type liquid level sensor is because of itself and measuring vessel direct UNICOM, and the temperature of measuring media, pressure do not need to repair again, therefore uses extensively in the level gauging loop.Float type liquid level sensor need to carry out actual liquid feeding to measuring circuit when verification just can complete verifying work to sensor.
Generally when float type liquid level sensor was worked, sensor sampler barrel float produced displacement with liquid surface lifting, and the reflection liquid level changes and changes into electric current to be exported; Therefore when verification, as shown in Figure 1, the sampler barrel 1 that at first will be communicated with container 3 is isolated out with it by valve 4, sampler barrel 1 top is silently reached the bottom again and silently pull down, utilize siphon principle, liquid storage cylinder that verification is used 2 fluid places are connected with sampler barrel 1 bottom, water in liquid storage cylinder 2 enters sampler barrel 1, by the lifting of sampler barrel 1 liquid level, change the displacement of float, complete the liquid feeding verifying work to float type liquid level sensor.
There is certain defective in the verification mode of this liquid storage cartridge type, and the liquid storage cylinder height arranges limited, pass through again the throttling of sampler barrel bottom interface when water enters sampler barrel, so liquid feeding speed is slow; When water enters sampler barrel, pressure is low, can't complete the washing away of sampler barrel, and in cylinder, deposition impurity can't be taken out of, easily causes the false disturbance of measurement of liquid level sensor, affects the accuracy of verification; Liquid storage cylinder adds the altitude location requirement that water can't satisfy the liquid level sensor verification, and checking procedure needs human intervention, carries out discharging water bottom sampler barrel, and altitude location exists visual error and response speed problem, affects checking precision; The liquid storage cylinder moisture storage capacity is limited in addition, and liquid level sensor checking procedure water can't reclaim, and affects surrounding environment, easily causes again air to sneak into as moisturizing midway, forms false water level, affects the verification accuracy.
Summary of the invention
Technical problem to be solved in the utility model is to provide the pneumatic liquid feeding calibration equipment of a kind of float type liquid level sensor, utilize this calibration equipment can conveniently implement the verification operation of float type liquid level sensor, overcome the defective of traditional verification mode, improve accuracy and the precision of sensor calibration, avoided checking procedure on the impact of environment.
for solving the problems of the technologies described above, the pneumatic liquid feeding calibration equipment of the utility model float type liquid level sensor comprises sampler barrel and the liquid storage cylinder that is provided with float type liquid level sensor, also comprise reduction valve, barrier valve, the first retaining valve, the second retaining valve, two position three way directional control valve, the first tensimeter and the second tensimeter, described reduction valve is connected with barrier valve and is connected, the output terminal described liquid storage cylinder of the connection top of described barrier valve, described the first tensimeter is located between described reduction valve and barrier valve, described the first retaining valve output terminal is communicated with bottom described liquid storage cylinder, input end is communicated with bottom described sampler barrel, described the second retaining valve input end is communicated with in the middle part of described liquid storage cylinder, output terminal is communicated with bottom described sampler barrel, described the second retaining valve input end is by the described two position three way directional control valve described sampler barrel of connection top, described the second tensimeter is located at bottom described sampler barrel.
Further, this device also comprises filtrator, and described filtrator is located between described the second retaining valve and two position three way directional control valve.
Further, this device also comprises safety valve, says that safety valve is located at described liquid storage cylinder top.
because the pneumatic liquid feeding calibration equipment of the utility model float type liquid level sensor has adopted technique scheme, be that this device comprises sampler barrel and the liquid storage cylinder that is provided with float type liquid level sensor, also comprise reduction valve, barrier valve, the first retaining valve, the second retaining valve, two position three way directional control valve, the first tensimeter and the second tensimeter, reduction valve is connected with barrier valve and is connected, the output terminal connection liquid storage cylinder top of barrier valve, the first tensimeter is located between reduction valve and barrier valve, the first retaining valve output terminal is communicated with bottom liquid storage cylinder, input end is communicated with bottom sampler barrel, the second retaining valve input end is communicated with in the middle part of liquid storage cylinder, output terminal is communicated with bottom sampler barrel, the second retaining valve input end is communicated with the sampler barrel top by two position three way directional control valve, the second tensimeter is located at bottom sampler barrel.This calibration equipment can conveniently be implemented the verification operation of float type liquid level sensor, overcomes the defective of traditional verification mode, has improved accuracy and the precision of sensor calibration, avoids checking procedure on the impact of environment.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the schematic diagram of float type liquid level sensor tradition method of calibration;
Fig. 2 is the schematic diagram of the pneumatic liquid feeding calibration equipment of the utility model float type liquid level sensor.
Embodiment
as shown in Figure 2, the pneumatic liquid feeding calibration equipment of the utility model float type liquid level sensor comprises sampler barrel 1 and the liquid storage cylinder 2 that is provided with float type liquid level sensor, also comprise reduction valve 5, barrier valve 6, the first retaining valve 7, the second retaining valve 8, two position three way directional control valve 11, the first tensimeter 9 and the second tensimeter 10, described reduction valve 5 is connected with barrier valve successively and is connected, the output terminal described liquid storage cylinder of connection 2 tops of described barrier valve 6, described the first tensimeter 9 is located between described reduction valve 5 and barrier valve 6, described the first retaining valve 7 output terminals are communicated with described liquid storage cylinder 2 bottoms, the input end described sampler barrel of connection 1 bottom, described the second retaining valve 8 input ends are communicated with described liquid storage cylinder 2 middle parts, the output terminal described sampler barrel of connection 1 bottom, described the second retaining valve 8 input ends are communicated with described sampler barrel 1 top by described two position three way directional control valve 11, described the second tensimeter 10 is located at described sampler barrel 1 bottom.
Further, this device also comprises filtrator 12, and described filtrator 12 is located between described the second retaining valve 8 and two position three way directional control valve 11.
Further, this device also comprises safety valve 13, says that safety valve 13 is located at described liquid storage cylinder 2 tops, to guarantee that liquid storage cylinder is as the security of accumulator.
When adopting this device to carry out verification to float type liquid level sensor, the reduction valve input end of this device can connect on-the-spot compressed gas source 14, compressed gas source 14 can be set up the pressure in 0.68Mpa by reduction valve, the first tensimeter shows the pressure P 1 after reduction valve, and barrier valve is carried and cut off pressurized air and enters liquid storing barrel.Two position three way directional control valve of rear connection is silently removed on the sampler barrel top of float type liquid level sensor, when needing sampler barrel is rinsed before verification, two position three way directional control valve switches to sampler barrel and is communicated with liquid storing barrel through filter, the gaseous tension that reduction valve is set up output can go out sampler barrel with hydraulic pressure, and water is filtered out to be got back to liquid storing barrel after deposition impurity in sampler barrel and complete cleaning to sampler barrel;
When enforcement was carried out verification to float type liquid level sensor, two position three way directional control valve was cut to being communicated with atmosphere, at this moment has following relation in sampler barrel between the output pressure of liquid level and reduction valve:
P
1=P
Atmosphere+ l
gh，
P
2=P
Atmosphere+ l
gh
P wherein
1Be that the first tensimeter is measured pressure, P
2Be that the second tensimeter is measured pressure, P
AtmosphereBe atmospheric pressure, l
gWith h be fluid density and liquid level, generally P in sampler barrel
Atmosphere, l
gBe definite value with h, if be equivalent to by the pressure of the water generates of 0.1Mpa the pressure that the 10M water column produces, will make so float produce different displacements, as long as it is corresponding with the sampler barrel liquid level that the output pressure of reduction valve is subtracted after atmospheric pressure, i.e. P
1-P
Atmosphere=l
gh。Therefore when float liquid level sensor is carried out verification, adjust the top hole pressure P of reduction valve
1P greater than the second tensimeter demonstration
2The time, the first one-way valve opens work, the second retaining valve is closed because of back pressure, and in sampler barrel, the water only import but no export is until P
2=P
1, obtain system balancing after desirable liquid level, can carry out adjustment for sensor.When needing to reduce liquid level, first the definite value of reduction valve is reduced to the respective value of required liquid level, at this moment P in sampler barrel
2Greater than P
1, the second one-way valve opens work, the first retaining valve is closed because of back pressure, and in sampler barrel, water comes back to liquid storage cylinder for cyclic check.Be to guarantee liquid storage cylinder as the safety of accumulator, on the liquid storage cylinder top, safety valve is installed, so that safe unloading pressure, guarantee the safety of verification operation.
This device passes through integrated setting with each Hydraulic Elements, take the pressurized air at scene under the condition of operation power, can be in the checking procedure of float type liquid level sensor, at first complete washing away pipeline and sampler barrel, then by the pressure in calibration equipment and the pressure ratio in sample bucket, automatically complete by calibration equipment as required to sampler barrel supply water and sample bucket in water reflux as required into the function of liquid storage cylinder.When satisfying the total travel verification of completing fast float type liquid level sensor, overcome the defective of traditional verification mode, avoid causing the waste at environmental pollution and water source, effectively improved accuracy and the precision of sensor calibration.
Claims (3)
1. pneumatic liquid feeding calibration equipment of float type liquid level sensor, comprise the sampler barrel and the liquid storage cylinder that are provided with float type liquid level sensor, it is characterized in that: also comprise reduction valve, barrier valve, the first retaining valve, the second retaining valve, two position three way directional control valve, the first tensimeter and the second tensimeter, described reduction valve is connected with barrier valve and is connected, the output terminal described liquid storage cylinder of the connection top of described barrier valve, described the first tensimeter is located between described reduction valve and barrier valve, described the first retaining valve output terminal is communicated with bottom described liquid storage cylinder, input end is communicated with bottom described sampler barrel, described the second retaining valve input end is communicated with in the middle part of described liquid storage cylinder, output terminal is communicated with bottom described sampler barrel, described the second retaining valve input end is by the described two position three way directional control valve described sampler barrel of connection top, described the second tensimeter is located at bottom described sampler barrel.
2. the pneumatic liquid feeding calibration equipment of float type liquid level sensor according to claim 1, it is characterized in that: this device also comprises filtrator, described filtrator is located between described the second retaining valve and two position three way directional control valve.
3. the pneumatic liquid feeding calibration equipment of float type liquid level sensor according to claim 1 and 2, it is characterized in that: this device also comprises safety valve, says that safety valve is located at described liquid storage cylinder top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619441 CN203011494U (en) | 2012-11-21 | 2012-11-21 | Pneumatic liquid adding verification device for float type liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619441 CN203011494U (en) | 2012-11-21 | 2012-11-21 | Pneumatic liquid adding verification device for float type liquid level sensor |
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| Publication Number | Publication Date |
|---|---|
| CN203011494U true CN203011494U (en) | 2013-06-19 |
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ID=48603079
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220619441 Expired - Fee Related CN203011494U (en) | 2012-11-21 | 2012-11-21 | Pneumatic liquid adding verification device for float type liquid level sensor |
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|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817024A (en) * | 2017-10-26 | 2018-03-20 | 西南石油大学 | A kind of gas-liquid mixture fluid flow on-line measuring device |
| CN108775948A (en) * | 2018-05-17 | 2018-11-09 | 北京航天计量测试技术研究所 | A kind of semi-automatic liquid level meter checking device |
| CN109506743A (en) * | 2018-11-23 | 2019-03-22 | 河北宏龙环保科技有限公司 | Flowmeter on-line proving device and scaling method |
| CN109556685A (en) * | 2017-09-26 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of float-type liquid level transmitter calibrating installation and its calibration method |
-
2012
- 2012-11-21 CN CN 201220619441 patent/CN203011494U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556685A (en) * | 2017-09-26 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of float-type liquid level transmitter calibrating installation and its calibration method |
| CN107817024A (en) * | 2017-10-26 | 2018-03-20 | 西南石油大学 | A kind of gas-liquid mixture fluid flow on-line measuring device |
| CN107817024B (en) * | 2017-10-26 | 2020-04-07 | 西南石油大学 | Gas-liquid mixture liquid flow on-line measuring device |
| CN108775948A (en) * | 2018-05-17 | 2018-11-09 | 北京航天计量测试技术研究所 | A kind of semi-automatic liquid level meter checking device |
| CN109506743A (en) * | 2018-11-23 | 2019-03-22 | 河北宏龙环保科技有限公司 | Flowmeter on-line proving device and scaling method |
| CN109506743B (en) * | 2018-11-23 | 2020-06-30 | 河北宏龙环保科技有限公司 | Flowmeter online calibration device and calibration method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20161121 |