CN218917322U - Calibration equipment of gas sensor - Google Patents
Calibration equipment of gas sensor Download PDFInfo
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- CN218917322U CN218917322U CN202222362606.2U CN202222362606U CN218917322U CN 218917322 U CN218917322 U CN 218917322U CN 202222362606 U CN202222362606 U CN 202222362606U CN 218917322 U CN218917322 U CN 218917322U
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Abstract
The utility model relates to the technical field of gas detection instruments and meters, and discloses a calibration device of a gas sensor, which comprises a standard gas pipe, wherein one end of the standard gas pipe is fixedly provided with a mass flowmeter, one end of the mass flowmeter is fixedly connected with a stainless steel pipe, one end of the stainless steel pipe is fixedly connected with a collecting pipe, one end of the collecting pipe is fixedly provided with a three-way head, one end of the three-way head is fixedly connected with an exhaust valve, one end of the exhaust valve is fixedly connected with the gas flowmeter, and one end of the gas flowmeter is provided with an exhaust port. According to the utility model, the upper computer control protocol conversion module is arranged, the protocol conversion module opens the mass flowmeter through the control signal line, the standard gas pipe conveys the gas for detection in the gas cylinder into the mass flowmeter, then the gas enters the collecting pipe through the stainless steel pipe, and then the gas outlet valve is opened to switch on the gas path, and then the standard gas enters the instrument to be calibrated, so that the instrument can be conveniently calibrated, and the efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of gas detection instruments and meters, in particular to a calibration device of a gas sensor.
Background
The current general calibration and verification mode is to introduce standard concentration gas into a gas detection port of a gas detector/analyzer through a hose by various purchased standard concentration gases, then to confirm and store calibration data after the collected data of the detector/analyzer are stable, and generally, 2-4 standard concentration gases are required to complete the calibration and verification work of a sensor, and in the whole verification process, the standard concentration gas source is required to be continuously replaced, so that the calibration and verification method is laborious and time-consuming.
Meanwhile, during calibration and verification, after the acquired data are stable, the selection and determination operation of the instrument and the meter is required to be manually performed to complete the calibration and verification work; many gases are toxic and harmful gases, which have influence on human health and even cause poisoning syncope and the like.
In view of this, we propose a calibration device for gas sensors to solve the above-mentioned problems.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides the calibration equipment of the gas sensor, which can realize the calibration work of any concentration gas in the range by only purchasing a standard concentration gas which is relatively close to the measuring range of the sensor, saves the work of replacing a standard gas source and improves the efficiency; and the device also has the advantages of avoiding the workers from being damaged by toxic and harmful gases without the on-site operation of the workers, and solves the technical problems.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions: the calibration equipment of the gas sensor comprises a standard gas pipe, wherein one end of the standard gas pipe is fixedly provided with a mass flowmeter, one end of the mass flowmeter is fixedly connected with a stainless steel pipe, one end of the stainless steel pipe is fixedly connected with a collecting pipe, one end of the collecting pipe is fixedly provided with a three-way head, one end of the three-way head is fixedly connected with an exhaust valve, one end of the exhaust valve is fixedly connected with the gas flowmeter, one end of the gas flowmeter is provided with an exhaust port, a port of the exhaust port is connected with a hose, the other end of the three-way head is fixedly connected with a testing assembly, and the outer surface of the mass flowmeter is connected with a control device;
the control device comprises a control signal line, a protocol conversion module and an upper computer, wherein one end of the control signal line is connected with the protocol conversion module, and one end of the protocol conversion module is connected with the upper computer.
Preferably, the standard gas pipe is a polytetrafluoroethylene pipe, and the standard gas pipe and the mass flowmeter are provided with a plurality of standard gas pipes and mass flowmeters.
Through the technical scheme, one end of the standard gas pipe is connected with the gas bottle, gas in the gas bottle is exhausted through the standard gas pipe, the standard gas pipe adopts the polytetrafluoroethylene pipe to have the characteristic of corrosion resistance, toxic and harmful gas can be prevented from corroding the standard gas pipe, the gas flows into the mass flowmeter after passing through the standard gas pipe, the mass flowmeter measures the gas, the gas is fused into a collecting pipe through a plurality of stainless steel pipes, the stainless steel pipes and the inner wall of the collecting pipe are subjected to polishing treatment, and the gas is prevented from adhering to the inner wall.
Preferably, one end of the control signal line is connected with the mass flowmeter, and the other end of the control signal line is connected with the protocol conversion module.
Through the technical scheme, the mass flowmeter is connected to the protocol conversion module in an RS communication mode through the control signal line, and the instrument to be calibrated is also connected to the protocol conversion module in an RS communication mode, and the protocol conversion module is used for receiving control signals of the upper computer.
Preferably, a USB interface is disposed on one side of the protocol conversion module, the USB interface is connected to a data line, the data line is connected to an upper computer, and the upper computer is a PC or an industrial personal computer.
Through the technical scheme, the data line is connected in the USB interface of the protocol conversion module, the data line is connected with the upper computer, and the upper computer is used for controlling the protocol conversion module and sending out signals to control the start and stop of the mass flowmeter.
Preferably, the test assembly comprises an air outlet valve, an air outlet pipe and an air exhaust cabinet, wherein the air outlet valve is fixedly connected to one end of the three-way head, one end of the air outlet valve is fixedly connected with the air outlet pipe, and one end of the air outlet pipe is arranged on the workbench of the air exhaust cabinet.
Through above-mentioned technical scheme, place the instrument and meter of waiting to calibrate on the workstation of exhaust cabinet, be connected with the outlet duct at the air inlet of instrument and meter during the calibration, then through opening the gas outlet valve switch-on gas circuit back, standard gas enters into the instrument and meter of waiting to calibrate in to through starting the fan on the exhaust cabinet, the tuber pipe on the fan communicates outdoors, so with the poisonous and harmful gaseous pump of leaking in the instrument and meter to outdoor emission, avoid indoor accumulation poisonous and harmful gas to cause the harm to the human body.
Compared with the prior art, the utility model provides the calibration equipment of the gas sensor, which has the following beneficial effects:
1. according to the utility model, the upper computer control protocol conversion module is arranged, the protocol conversion module opens the mass flowmeter through the control signal line, the standard gas pipe conveys the gas for detection in the gas cylinder into the mass flowmeter, then the gas enters the collecting pipe through the stainless steel pipe, and then the gas outlet valve is opened to switch on the gas path, and then the standard gas enters the instrument to be calibrated, so that the instrument can be conveniently calibrated, and the efficiency is improved.
2. According to the utility model, the instrument to be calibrated is placed on the workbench of the exhaust cabinet, the air inlet of the instrument is connected with the air outlet pipe during calibration, then the air outlet valve is opened to switch on the air channel, standard gas enters the instrument to be calibrated, and the air pipe on the fan is communicated to the outside by starting the fan on the exhaust cabinet, so that the leaked toxic and harmful gas in the instrument is pumped to the outside for discharge, and the damage of the indoor accumulated toxic and harmful gas to a human body is avoided.
Drawings
FIG. 1 is a schematic perspective view of the structure of the present utility model;
FIG. 2 is a schematic flow chart of the structure of the present utility model;
fig. 3 is a schematic top view of the structure of the present utility model.
Wherein: 1. a standard gas tube; 2. a mass flowmeter; 3. stainless steel tube; 4. a header pipe; 5. a tee joint; 6. an exhaust valve; 7. a gas flow meter; 8. a hose; 9. a testing component; 91. an air outlet valve; 92. an air outlet pipe; 93. an exhaust cabinet; 10. a control device; 101. a control signal line; 102. a protocol conversion module; 103. and an upper computer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
as shown in fig. 1-2, the calibration device for the gas sensor provided by the utility model comprises a standard gas pipe 1, wherein one end of the standard gas pipe 1 is fixedly provided with a mass flowmeter 2, one end of the mass flowmeter 2 is fixedly connected with a stainless steel pipe 3, one end of the stainless steel pipe 3 is fixedly connected with a collecting pipe 4, one end of the collecting pipe 4 is fixedly provided with a three-way head 5, one end of the three-way head 5 is fixedly connected with an exhaust valve 6, one end of the exhaust valve 6 is fixedly connected with a gas flowmeter 7, one end of the gas flowmeter 7 is provided with an exhaust port, a port of the exhaust port is connected with a hose 8, the other end of the three-way head 5 is fixedly connected with a test assembly 9, and the outer surface of the mass flowmeter 2 is connected with a control device 10;
the control device 10 comprises a control signal line 101, a protocol conversion module 102 and an upper computer 103, wherein one end of the control signal line 101 is connected with the protocol conversion module 102, and one end of the protocol conversion module 102 is connected with the upper computer 103.
Specifically, the standard gas pipe 1 is a polytetrafluoroethylene pipe, and the standard gas pipe 1, the mass flowmeter 2 and the stainless steel pipe 3 are provided with a plurality of pipes. The advantage is, the gas cylinder is connected to the one end of standard gas pipe 1, and the gas in the gas cylinder is discharged through standard gas pipe 1, and standard gas pipe 1 adopts polytetrafluoroethylene pipe to have corrosion-resistant characteristic, can prevent that poisonous and harmful gas from corroding standard gas pipe 1, and in the gas flow meter 2 after standard gas pipe 1, mass flowmeter 2 measures gas to in the confluence pipe 4 is fused with gas through a plurality of stainless steel pipe 3, the inner wall of stainless steel pipe 3 and confluence pipe 4 is through polishing, prevents that gas from adhering on the inner wall.
Specifically, one end of the control signal line 101 is connected to the mass flowmeter 2, and the other end of the control signal line 101 is connected to the protocol conversion module 102. The mass flowmeter 2 is connected to the protocol conversion module 102 in an RS485 communication mode through the control signal line 101, and instruments to be calibrated are also connected to the protocol conversion module 102 in an RS485 communication mode, and the protocol conversion module 102 is used for receiving control signals of the upper computer 103.
Specifically, a USB interface is disposed on one side of the protocol conversion module 102, the USB interface is connected to a data line, the data line is connected to the upper computer 103, and the upper computer 103 is a PC or an industrial personal computer. The advantage is that the USB interface of protocol conversion module 102 is connected with the data line, and the data line is connected with host computer 103 again, and host computer 103 is used for controlling protocol conversion module 102, and the start-stop of mass flowmeter 2 is controlled to its signal that sends.
Embodiment two:
as shown in fig. 3, as an improvement of the previous embodiment, specifically, the test assembly 9 includes an air outlet valve 91, an air outlet pipe 92 and an air outlet cabinet 93, the air outlet valve 91 is fixedly connected to one end of the three-way head 5, one end of the air outlet valve 91 is fixedly connected to the air outlet pipe 92, and one end of the air outlet pipe 92 is disposed on a workbench of the air outlet cabinet 93. The air inlet of the instrument and meter is connected with the air outlet pipe 92 during calibration, and then standard gas enters the instrument and meter to be calibrated after the air outlet valve 91 is opened to switch on the air path, and the fan on the air outlet cabinet 93 is started to be communicated with the air pipe on the fan outdoors, so that the leaked poisonous and harmful gas in the instrument and meter is pumped to be discharged outdoors, and the damage to human bodies caused by indoor accumulation of the poisonous and harmful gas is avoided.
When the gas inlet and the gas outlet pipe 92 of the instrument to be calibrated are connected, the calibration signal is sent through the upper computer, the mass flowmeter 2 is opened through the control signal line 101 after the protocol conversion module 102 receives the signal, the standard gas pipe 1 conveys the gas for detection in the gas cylinder to the mass flowmeter 2, then the gas enters the collecting pipe 4 through the stainless steel pipe 3, then the gas outlet valve 91 is opened to be communicated, the standard gas enters the instrument to be calibrated, the fan on the gas outlet cabinet 93 is started, the air pipe on the fan is communicated to the outside, and thus the leaked toxic and harmful gas in the instrument is pumped to the outside for emission, and the damage to human bodies caused by the accumulated toxic and harmful gas in the room is avoided.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A calibration device for a gas sensor comprising a standard gas tube, characterized in that: one end of the standard gas pipe is fixedly provided with a mass flowmeter, one end of the mass flowmeter is fixedly connected with a stainless steel pipe, one end of the stainless steel pipe is fixedly connected with a collecting pipe, one end of the collecting pipe is fixedly provided with a three-way head, one end of the three-way head is fixedly connected with an exhaust valve, one end of the exhaust valve is fixedly connected with the gas flowmeter, one end of the gas flowmeter is provided with an exhaust port, a port of the exhaust port is connected with a hose, the other end of the three-way head is fixedly connected with a testing assembly, and the outer surface of the mass flowmeter is connected with a control device;
the control device comprises a control signal line, a protocol conversion module and an upper computer, wherein one end of the control signal line is connected with the protocol conversion module, and one end of the protocol conversion module is connected with the upper computer.
2. A gas sensor calibration apparatus according to claim 1, wherein: the standard gas pipe is a polytetrafluoroethylene pipe, and the standard gas pipe and the mass flowmeter are provided with a plurality of standard gas pipes and mass flowmeters.
3. A gas sensor calibration apparatus according to claim 1, wherein: one end of the control signal wire is connected with the mass flowmeter, and the other end of the control signal wire is connected with the protocol conversion module.
4. A gas sensor calibration apparatus according to claim 1, wherein: one side of the protocol conversion module is provided with a USB interface, the USB interface is connected with a data line, the data line is connected with an upper computer, and the upper computer is a PC or an industrial personal computer.
5. A gas sensor calibration apparatus according to claim 1, wherein: the test assembly comprises an air outlet valve, an air outlet pipe and an air exhaust cabinet, wherein the air outlet valve is fixedly connected to one end of the three-way head, one end of the air outlet valve is fixedly connected with the air outlet pipe, and one end of the air outlet pipe is arranged on the workbench of the air exhaust cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222362606.2U CN218917322U (en) | 2022-09-06 | 2022-09-06 | Calibration equipment of gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222362606.2U CN218917322U (en) | 2022-09-06 | 2022-09-06 | Calibration equipment of gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218917322U true CN218917322U (en) | 2023-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222362606.2U Active CN218917322U (en) | 2022-09-06 | 2022-09-06 | Calibration equipment of gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218917322U (en) |
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2022
- 2022-09-06 CN CN202222362606.2U patent/CN218917322U/en active Active
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