CN204228690U - A kind of gas sensor calibration Multi-way switching device - Google Patents

A kind of gas sensor calibration Multi-way switching device Download PDF

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Publication number
CN204228690U
CN204228690U CN201420705699.7U CN201420705699U CN204228690U CN 204228690 U CN204228690 U CN 204228690U CN 201420705699 U CN201420705699 U CN 201420705699U CN 204228690 U CN204228690 U CN 204228690U
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gas
verification
gas sensor
passage
switching device
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CN201420705699.7U
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李军伟
张胜峰
张学军
黄理瑞
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Power Polytron Technologies Inc
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Zhengzhou GL Tech Co
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Abstract

The utility model discloses a kind of gas sensor calibration Multi-way switching device, comprise some the gas circuits for being communicated with variable concentrations standard source of the gas, every bar gas circuit is provided with a change-over switch, the outlet side of each bar gas circuit is connected with at least one verification passage, on each verification passage, string is provided with verification switch and at least one gas sensor to be measured, and the end of each verification passage is used for being communicated with gas exhaust duct.Gas sensor calibration Multi-way switching device of the present utility model, provide the measurement gas circuit of the gas of many variable concentrations, and different gas circuits is switched by change-over switch, well solve application methane transducer and demarcate and checkout procedure complexity, the problems such as troublesome poeration.This apparatus cost is with low cost, greatly reduces survey crew work difficulty, easy to use, and has very high promotional value.

Description

A kind of gas sensor calibration Multi-way switching device
Technical field
The utility model relates to a kind of gas sensor calibration Multi-way switching device.
Background technology
Current Safety of Coal Mine Production is the most important thing of colliery industry, and most important as Safety of Coal Mine Production is exactly extraction and the early warning of methane and CO gas.And be also the requisite survey instrument in each mining area as the surveying instrument of methane and CO gas.On market, relevant gasmetry instrument can be found everywhere.But this Calibration of measuring equipment and verification are a great problems that the current the sector of puzzlement develops.
The measurement range of general methane gas surveying instrument is: 0-100%, according to coal industry standard, Demarcate Gas and the verification of methane transducer need at least 6 points, and each demarcation and checkpoint need at least 20 minutes stable time, the displacement carrying out nitrogen is also needed when the methane gas of variable concentrations is replaced, time is also very very long, calibration appliance requires nearly 3 hours, and need manually to stand fast at, work efficiency reduces greatly, and calibration appliance requires ceaselessly changes gas cylinder, security and operability are all very poor.
In current industry, a lot of producer all adopts bottle of taking a breath manually, and the gas of variable concentrations all needs to change, and changes the flow once needing adjustment storage pressure and methane gas.There is again the not enough situation of gas cylinder when carrying out multiple instrument calibration, greatly reducing production efficiency and company operation cost.
Utility model content
The purpose of this utility model is to provide a kind of gas sensor calibration Multi-way switching device, the security adopting artificial ventilation to cause during to solve gas sensor calibration and verification and the problem of operability difference.
In order to realize above object, the technical scheme that the utility model adopts is: a kind of gas sensor calibration Multi-way switching device, comprise some the gas circuits for being communicated with variable concentrations standard source of the gas, every bar gas circuit is provided with a change-over switch, the outlet side of each bar gas circuit is connected with at least one verification passage, on each verification passage, string is provided with verification switch and at least one gas sensor to be measured, and the end of each verification passage is used for being communicated with gas exhaust duct.
On each verification passage, also string is provided with and gas sensor to be measured operation valve one to one, and each gas sensor to be measured and corresponding operation valve interval are arranged.
On each verification passage, all string is provided with a flowmeter.
Described change-over switch and check valve and operation valve are explosion-proof solenoid valve.
Each verification passage is also connected with one for being communicated with displacement source of the gas the displacement gas circuit verifying gas concentration in passage with quick adjustment.
Gas sensor calibration Multi-way switching device of the present utility model, provide the measurement gas circuit of the gas of many variable concentrations, and different gas circuits is switched by change-over switch, well solve application methane transducer and demarcate and checkout procedure complexity, the problems such as troublesome poeration.This apparatus cost is with low cost, greatly reduces survey crew work difficulty, easy to use, and has very high promotional value.
Each change-over switch, verification switch, operation valve are solenoid valve, and the switch utilizing industrial computer to carry out station controls automatically, substantially increases efficiency and the accuracy of test; Adopt many verification passages mode combined of connect with each passage inner sensor in parallel, provide different stations to arrange, solve and connect time-consuming, parallel connection takes a difficult problem for gas.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the utility model Multi-way switching device.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.
Be illustrated in figure 1 the structure principle chart of the utility model gas sensor calibration Multi-way switching device embodiment, as seen from the figure, this device comprises some the gas circuits for being communicated with variable concentrations standard source of the gas, every bar gas circuit is provided with a change-over switch, the outlet side of each bar gas circuit is connected with at least one verification passage, on each verification passage, string is provided with verification switch and at least one gas sensor to be measured, and the end of each verification passage is used for being communicated with gas exhaust duct.
On each verification passage, also string is provided with a flow and takes into account and gas sensor to be measured operation valve one to one, and each gas sensor to be measured and corresponding operation valve interval are arranged.
Because this device is used for gas sensor calibration, some gas is flammable explosive gas, therefore, need impermeability and the explosion-proof of rigorous concentration pipeline and switch, then the change-over switch in the present embodiment and check valve and operation valve all select explosion-proof solenoid valve.
In addition, when switching, in order to quick by verification passage in high concentrations of gas rapid dilution be light concentration gas, the present embodiment, except arranging many gas circuits be communicated with variable concentrations standard source of the gas, is also provided with one for being communicated with displacement source of the gas the displacement gas circuit verifying gas concentration in passage with quick adjustment.
Be described for methane gas sensor below: as shown in Figure 1, according to coal industry standard, due to Demarcate Gas and verification needs at least 6 points of methane transducer, then be provided with methane gas gas circuit and the 1 road substitution gas gas circuit of 6 road variable concentrations in the present embodiment, because mixed gas is generally nitrogen in the methane gas of variable concentrations, then this displacement gas circuit connects the gas of pure nitrogen gas, and the methane gas for variable concentrations is replaced, and substantially increases the efficiency of work.In each gas gas circuit with 1 explosion-proof solenoid valve as change-over switch.
The present embodiment selects 3 to check passage to carry out parallel connection, each verification passage is connected in series 2 methane transducers, demarcation and the verification of 6 methane transducers (1A, 1B, 2A, 2B, 3A, 3B) can be carried out simultaneously, have employed the Hybrid connections mode of series and parallel connections, both saved methane gas and turn improved work efficiency.
In order to realize the testing and control to single-sensor, a gauge tap is arranged to each sensor to be measured.For No. 1 passage, valve 8 is the verification switch of this passage, for being communicated with this verification passage; FR is the suspended body flowmeter of this passage; Valve 11 is the operation valve of sensor 1A, and its 1 mouthful is communicated with sensor 1A, and 2 mouthfuls are communicated with for the sensor 1B be connected in series with the next one, 3 mouthfuls for being communicated with gas exhaust piping, this syndeton can meet the test of single-sensor; Valve 14 is the operation valve of sensor 1B, and its 1 mouthful is communicated with sensor 1B, and 2 mouthfuls are all communicated with outlet pipe with 3 mouthfuls.
Above-mentioned each solenoid valve is all 1 ~ 2 mouthful of connection when powering on, and during power-off, 1 ~ 3 mouthful of connection, ensure that when power-off, also can control the gas in discharge line.
In Fig. 1, (valve 1 is for the access of nitrogen gas for adjusting the methane gas of variable concentrations and nitrogen for explosion-proof solenoid valve 1-valve 7, valve 2-valve 7 is for the access of variable concentrations methane gas), controlled the switch of different valves by tracking telemetry and command station, realize the switching of the methane gas of variable concentrations.Monitoring host computer is PC, the setting of flow process and completing of communication during for demarcating and verifying.Suspended body flowmeter, for controlling the flow of the methane gas of different passage, to make methane transducer stably measured, is avoided occurring measuring error.Three passages are in parallel, and controlled by different valves respectively, each passage provides 2 stations, altogether can provide 6 test station, is set the service condition of passage and station by host computer.
Principle of work and the process of this device are as follows: first engaging means power supply (220V AC), to the methane transducer of test be needed to be installed on corresponding station again, the valve that the station that PC sets sensor is corresponding with the concentration needing test gas, and set the flow process of test.Here generally adopt by the switching principle of low concentration to high concentration, when can ensure to switch between two kinds of concentration, automatically realize concentration balance from low to high; When being transformed into low concentration by high concentration, can first pass into substitution gas a period of time, after the gas concentration in guarantee passage is enough low, passing into the gas of low concentration again.
Enter into and measure interface, according to software prompt, the gas cylinder of the calibrating gas of access is set (flow controlling to the gas of each concentration is desired value); Enter automatic Verification process, device can carry out the automatic switchover of variable concentrations methane gas according to the flow process of setting; After having tested, logging test results also shuts down.
It should be noted that the utility model not only can realize the demarcation of methane gas sensor, also can realize the inspection of other gas sensors such as CO, CO2, its principle is identical, only changes corresponding gas when testing.
Above embodiment only understands core concept of the present utility model for helping; the utility model can not be limited with this; such as check the number of the gas sensor to be measured that the number of passage, each verification passage are connected in series can carry out accommodation according to actual conditions; for those skilled in the art; every according to thought of the present utility model; the utility model is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection domain of the present utility model.

Claims (5)

1. a gas sensor calibration Multi-way switching device, it is characterized in that: comprise some the gas circuits for being communicated with variable concentrations standard source of the gas, every bar gas circuit is provided with a change-over switch, the outlet side of each bar gas circuit is connected with at least one verification passage, on each verification passage, string is provided with verification switch and at least one gas sensor to be measured, and the end of each verification passage is used for being communicated with gas exhaust duct.
2. gas sensor calibration Multi-way switching device according to claim 1, is characterized in that: on each verification passage, also string is provided with and gas sensor to be measured operation valve one to one, and each gas sensor to be measured and corresponding operation valve interval are arranged.
3. gas sensor calibration Multi-way switching device according to claim 1, is characterized in that: on each verification passage, all string is provided with a flowmeter.
4. gas sensor calibration Multi-way switching device according to claim 2, is characterized in that: described change-over switch and check valve and operation valve are explosion-proof solenoid valve.
5. the gas sensor calibration Multi-way switching device according to Claims 1 to 4 any one, is characterized in that: each verification passage is also connected with one for being communicated with displacement source of the gas the displacement gas circuit verifying gas concentration in passage with quick adjustment.
CN201420705699.7U 2014-11-21 2014-11-21 A kind of gas sensor calibration Multi-way switching device Active CN204228690U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108918788A (en) * 2018-09-06 2018-11-30 汉威科技集团股份有限公司 The finished product mark checking device and mark check system of detector
CN109738591A (en) * 2019-02-20 2019-05-10 苏州曼德克光电有限公司 A kind of gas alarm device caliberating device
CN110031419A (en) * 2019-04-08 2019-07-19 中国矿业大学 A kind of automatic calibrator of non-dispersive infrared methane sensor
CN111289176A (en) * 2020-01-03 2020-06-16 武汉钢铁有限公司 Quick connection switching device for pressure transmitter calibration
CN112727580A (en) * 2019-10-28 2021-04-30 沪东重机有限公司 Working time sequence-based NOx sensor calibration method
CN113109510A (en) * 2021-03-25 2021-07-13 山东瑶安电子科技发展有限公司 Calibration device for gas sensor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108918788A (en) * 2018-09-06 2018-11-30 汉威科技集团股份有限公司 The finished product mark checking device and mark check system of detector
CN109738591A (en) * 2019-02-20 2019-05-10 苏州曼德克光电有限公司 A kind of gas alarm device caliberating device
CN110031419A (en) * 2019-04-08 2019-07-19 中国矿业大学 A kind of automatic calibrator of non-dispersive infrared methane sensor
CN112727580A (en) * 2019-10-28 2021-04-30 沪东重机有限公司 Working time sequence-based NOx sensor calibration method
CN111289176A (en) * 2020-01-03 2020-06-16 武汉钢铁有限公司 Quick connection switching device for pressure transmitter calibration
CN111289176B (en) * 2020-01-03 2021-08-10 武汉钢铁有限公司 Quick connection switching device for pressure transmitter calibration
CN113109510A (en) * 2021-03-25 2021-07-13 山东瑶安电子科技发展有限公司 Calibration device for gas sensor

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Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10

Patentee after: Power Polytron Technologies Inc

Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10

Patentee before: Zhengzhou GL Tech Company

CP01 Change in the name or title of a patent holder