Calibrating device for gas detector

Abstract

The utility model relates to the technical field of gas alarm verification, in particular to a gas detector verification device, which comprises a plurality of gas detectors, a verification support, a gas generation assembly and a verification unit, and a plurality of brackets with the front parts capable of fixedly installing the gas detectors are fixedly installed on the front side of the verification support at intervals. According to the utility model, the structure is reasonable and compact, the connection between the standard gas cylinder and the gas detector is facilitated by arranging the gas collecting pipe, the gas in the gas collecting pipe and the pipeline can be emptied by arranging the exhaust pipe and the exhaust valve, the interference phenomenon caused by the introduction of gases with different concentrations into the gas detector can be avoided, and the verification accuracy can be improved; by arranging the verification unit, after gases with different concentrations are introduced into the gas detector, the verification unit can collect the detection value of the gas detector in time, so that whether the detection result of the gas detector is qualified or not is judged, automatic verification of the gas detector is realized, and the verification working efficiency and quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas alarm verification, and is a gas detector verification device. Background Art

[0002] Point-type gas detectors are instruments that monitor dangerous gas leaks and alarms. They are usually installed in places where dangerous gas leaks may occur to monitor whether there are dangerous gases in the air and sound an alarm when the gas concentration exceeds a preset threshold. The detection principles of the detector include catalytic combustion, semiconductor, spectral absorption, electrochemistry, etc. It can convert the concentration of the monitored gas into an electrical signal output and connect it to the control system or alarm equipment.

[0003] Point-type gas detectors have a wide range of applications. They can detect combustible gases (such as methane and hydrogen), toxic gases (such as carbon monoxide and hydrogen sulfide), etc. They are used in industrial production, environmental monitoring, fire protection, municipal gas and other fields, playing an important role in ensuring safe production, protecting life and health, and guarding the green ecological environment. In order to ensure the accuracy and reliability of gas detectors, they need to be calibrated regularly. However, traditional calibration methods are all manual operations, which are labor-intensive, inefficient and unsafe. Summary of the invention

[0004] The utility model provides a gas detector calibration device, which overcomes the deficiencies of the prior art and can effectively solve the problems of high labor intensity, low efficiency and unsafety in the conventional gas detector calibration.

[0005] The technical solution of the utility model is achieved through the following measures: a gas detector calibration device, including a plurality of gas detectors, and also including a calibration bracket, a gas generating assembly and a calibration unit, a plurality of brackets on the front of which the gas detectors can be fixedly installed are fixedly installed at intervals on the front side of the calibration bracket, the gas generating assembly includes a gas collecting pipe, a control valve and a plurality of standard gas cylinders, an outlet of each standard gas cylinder is fixedly connected to the gas collecting pipe with an outlet pipe, each gas outlet pipe is installed with a control valve, an air inlet of each gas detector is fixedly connected to the gas collecting pipe with an air inlet pipe, the gas collecting pipe is fixedly connected with an exhaust pipe, the exhaust pipe is installed with an exhaust valve, and each gas detector is connected to the calibration unit.

[0006] The following are further optimizations and / or improvements to the above utility model technical solution:

[0007] The above-mentioned gas generating component may also include a vacuum pump and a solenoid valve. A vacuum tube is fixedly connected between the vacuum pump air inlet and the gas collecting pipe. A solenoid valve is installed on the vacuum tube and each gas outlet pipe at a position corresponding to the gas collecting pipe and the control valve. The exhaust valve and each solenoid valve are connected to the calibration unit.

[0008] The above-mentioned verification unit may include a control module, a conversion module and a host computer, each gas detector is connected to the conversion module, the conversion module, the vacuum pump, the exhaust valve and each solenoid valve are connected to the control module, and the control module is connected to the host computer.

[0009] The control valve may be a pressure reducing valve, and a flow meter is installed on each air inlet pipe.

[0010] The front side of the above-mentioned calibration bracket may be provided with a plurality of mounting grooves opening forward at intervals. The mounting grooves are T-shaped with a narrow front and a wide back. The bracket is L-shaped. An oblong mounting hole penetrating from front to back is provided on the front side of the upper part of the bracket. Connecting bolts with connecting nuts screwed on after passing through the mounting holes at the front ends are installed in the mounting grooves. A calibration cover is fixedly installed on the upper front side of the bracket, and the lower part of the gas detector is fixedly installed in the calibration cover. The air inlet pipe is fixedly connected between the calibration cover and the gas collecting pipe.

[0011] The utility model has a reasonable and compact structure. By arranging a gas collecting pipe, it is convenient to connect the standard gas cylinder with the gas detector. By arranging an exhaust pipe and an exhaust valve, the gas in the gas collecting pipe and the pipeline can be emptied, so as to avoid interference caused by gases of different concentrations passing into the gas detector, and the accuracy of verification can be improved. By arranging a verification unit, after gases of different concentrations pass into the gas detector, the verification unit can timely collect the detection value of the gas detector, so as to determine whether the detection result of the gas detector is qualified, and the automatic verification of the gas detector is realized, which can improve the efficiency and quality of verification work, save precious human resources and time resources, and ensure the reliability of the verification result. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural schematic diagram of the best embodiment of the utility model.

[0013] Attached Figure 2 It is a schematic diagram of the main structure of the calibration bracket in the best embodiment of the utility model.

[0014] Attached Figure 3 It is a schematic diagram of the left side cross-sectional structure of the calibration bracket in the best embodiment of the utility model.

[0015] The codes in the accompanying drawings are: 1 is a calibration bracket, 2 is a bracket, 3 is a gas detector, 4 is a gas collecting pipe, 5 is a control valve, 6 is a vacuum pump, 7 is a standard gas cylinder, 8 is an air inlet pipe, 9 is an air outlet pipe, 10 is an exhaust valve, 11 is an exhaust pipe, 12 is a solenoid valve, 13 is a vacuum tube, 14 is a control module, 15 is a conversion module, 16 is a host computer, 17 is a mounting groove, 18 is a mounting hole, 19 is a connecting bolt, 20 is a connecting nut, 21 is a calibration cover, and 22 is a flow meter. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0018] The present invention is further described below in conjunction with the embodiments and drawings:

[0019] Embodiment 1: As shown in the attached Figure 1 , 2 As shown in Figure 3, the gas detector calibration device includes a plurality of gas detectors 3, a calibration bracket 1, a gas generating assembly and a calibration unit. A plurality of brackets 2 are fixedly installed at intervals on the front side of the calibration bracket 1, each of which can be fixedly installed with a gas detector 3 at the front. The gas generating assembly includes a gas collecting pipe 4, a control valve 5 and a plurality of standard gas cylinders 7. An outlet pipe 9 is fixedly connected to the gas collecting pipe 4 between the outlet of each standard gas cylinder 7, and a control valve 5 is installed on each gas outlet pipe 9. An intake pipe 8 is fixedly connected to the gas collecting pipe 4 between the air inlet of each gas detector 3, and an exhaust pipe 11 is fixedly connected to the gas collecting pipe 4. An exhaust valve 10 is installed on the exhaust pipe 11. Each gas detector 3 is connected to the calibration unit.

[0020] According to the requirements, the calibration bracket 1 can be made of aluminum profiles. The number of brackets 2 is 8, and 8 gas detectors 3 can be installed. The 8 gas detectors 3 can be calibrated at the same time. The gas detector 3 is an existing well-known technology, such as a point-type gas detector. The number of standard gas cylinders 7 is 4, and the gas concentrations of the 4 standard gas cylinders 7 are different. Among them, the gas concentrations of 3 standard gas cylinders 7 are 10%, 40%, and 60% respectively, and the gas in the remaining 1 standard gas cylinder 7 is nitrogen or zero-point gas. The standard gas cylinder 7 can use the existing standard gas cylinder in the laboratory, or the laboratory gas distribution equipment, so that the gas detector 3 can be calibrated according to the specifications. The gas collecting pipe 4 is an existing well-known technology, such as a tubular structure with closed ends or a gas distributor. During use, by setting up the gas collecting pipe 4, the connection between the standard gas cylinder 7 and the gas detector 3 is facilitated. By setting up the exhaust pipe 11 and the exhaust valve 10, the gas in the gas collecting pipe 4 and the pipeline can be emptied to avoid interference caused by gases of different concentrations entering the gas detector 3, which can improve the accuracy of verification. By setting up a verification unit, after gases of different concentrations are passed into the gas detector 3, the verification unit can timely collect the detection value of the gas detector 3, so as to determine whether the detection result of the gas detector 3 is qualified, thereby realizing automatic verification of the gas detector 3, which can significantly improve the efficiency and quality of verification work, save precious human resources and time resources, and ensure the reliability of the verification results.

[0021] The above gas detector calibration device can be further optimized and / or improved according to actual needs:

[0022] Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the gas generating assembly also includes a vacuum pump 6 and a solenoid valve 12. A vacuum tube 13 is fixedly connected between the air inlet of the vacuum pump 6 and the gas collecting pipe 4. A solenoid valve 12 is installed on the vacuum tube 13 and each gas outlet pipe 9 at a position corresponding to the gas collecting pipe 4 and the control valve 5. The exhaust valve 10 and each solenoid valve 12 are connected to the calibration unit.

[0023] According to the requirements, the exhaust valve 10 is a known electromagnetic valve. During use, by setting the vacuum pump 6, the gas in the pipeline after the calibration can be cleared to prevent the gas in the pipeline from affecting the calibration results of the next batch of gas detectors 3. By setting the electromagnetic valve 12, it is convenient to open and close the standard gas cylinder 7, so as to perform calibration operations of various gas concentrations on the gas detector 3, thereby improving the calibration efficiency.

[0024] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, the calibration unit includes a control module 14, a conversion module 15 and a host computer 16, each gas detector 3 is connected to the conversion module 15, the conversion module 15, the vacuum pump 6, the exhaust valve 10 and each solenoid valve 12 are connected to the control module 14, and the control module 14 is connected to the host computer 16.

[0025] According to the requirements, the control module 14 is an existing well-known technology, such as TMS320LF2407DS chip, the conversion module 15 is an existing well-known technology, such as TLV5620DAC digital-to-analog conversion chip, and the host computer 16 is an existing well-known technology. During use, through such a setting, it is convenient to control multiple solenoid valves 12, so that the detection results of the corresponding gas detectors 3 are collected and displayed through the host computer 16, making the calibration operation of the gas detector 3 more flexible.

[0026] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the control valve 5 is a pressure reducing valve, and a flow meter 22 is installed on each air inlet pipe 8.

[0027] According to the requirements, the flow meter 22 is a known float flow meter, and the solenoid valve 12, the control valve 5, the exhaust valve 10, the flow meter 22 and the gas collecting pipe 4 can be installed on the box body for easy transfer and connection. During use, through such a setting, the flow rate and pressure of the gas output from the standard gas cylinder 7 can be adjusted to meet the calibration procedures of the gas detector 3, and gas detectors 3 of different specifications can also be calibrated.

[0028] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 2 , 3 As shown, the front side of the calibration bracket 1 is provided with a plurality of mounting grooves 17 opening forward at intervals, the mounting grooves 17 are T-shaped with a narrow front and a wide back, the bracket 2 is L-shaped, and the upper front side of the bracket 2 is provided with an oblong mounting hole 18 extending from front to back, a connecting bolt 19 is installed in the mounting groove 17, the front end of the bolt passes through the mounting hole 18 and is screwed with a connecting nut 20, a calibration cover 21 is fixedly installed on the upper front side of the bracket 2, the lower part of the gas detector 3 is fixedly installed in the calibration cover 21, and the air inlet pipe 8 is fixedly connected between the calibration cover 21 and the gas collecting pipe 4.

[0029] According to the requirements, the air inlet end of the gas detector 3 is fixedly installed in the calibration cover 21, which is a known calibration cover for gas detectors. The calibration cover 21 has an air inlet short pipe connected to the air inlet of the gas detector 3, and the connecting nut 20 is a known plum handle nut. During use, such a setting facilitates the rapid disassembly and assembly of the gas detector 3, which can improve the calibration efficiency of the gas detector 3.

[0030] The gas detector calibration device can reduce the calibration time of a single gas detector 3, improve work efficiency, greatly reduce the labor intensity of calibration personnel, reduce labor damage, ensure the accuracy and reliability of the gas detector 3 value, and meet the requirements of gas measurement technical specifications.

[0031] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A gas detector calibration device, comprising a plurality of gas detectors, characterized in that It also includes a calibration bracket, a gas generating assembly and a calibration unit. A number of brackets on the front of the calibration bracket are fixedly installed at intervals. The gas generating assembly includes a gas collecting pipe, a control valve and a number of standard gas cylinders. The outlet of each standard gas cylinder is fixedly connected to the gas collecting pipe with an outlet pipe, and each gas outlet pipe is installed with a control valve. The air inlet of each gas detector is fixedly connected to the gas collecting pipe with an inlet pipe, and the gas collecting pipe is fixedly connected to an exhaust pipe, and the exhaust pipe is installed with an exhaust valve. Each gas detector is connected to the calibration unit.

2. The gas detector calibration device according to claim 1, characterized in that The gas generating assembly also includes a vacuum pump and a solenoid valve. A vacuum tube is fixedly connected between the vacuum pump air inlet and the gas collecting pipe. A solenoid valve is installed on the vacuum tube and each gas outlet pipe at a position corresponding to the gas collecting pipe and the control valve. The exhaust valve and each solenoid valve are connected to the calibration unit.

3. The gas detector calibration device according to claim 2, characterized in that The calibration unit includes a control module, a conversion module and a host computer. Each gas detector is connected to the conversion module. The conversion module, the vacuum pump, the exhaust valve and each solenoid valve are connected to the control module. The control module is connected to the host computer.

4. The gas detector calibration device according to claim 1, 2 or 3, characterized in that The control valve is a pressure reducing valve and a flow meter is installed on each air inlet pipe.

5. The gas detector calibration device according to claim 1, 2 or 3, characterized in that There are several mounting grooves opening forward at intervals on the front side of the calibration bracket. The mounting grooves are T-shaped with a narrow front and a wide back. The bracket is L-shaped. An oblong mounting hole penetrating from front to back is provided on the front side of the upper part of the bracket. Connecting bolts with connecting nuts screwed on after passing through the mounting holes at the front ends are installed in the mounting grooves. A calibration cover is fixedly installed on the upper front side of the bracket, and the lower part of the gas detector is fixedly installed in the calibration cover. The air inlet pipe is fixedly connected between the calibration cover and the gas collecting pipe.

6. The gas detector calibration device according to claim 4, characterized in that There are several mounting grooves opening forward at intervals on the front side of the calibration bracket. The mounting grooves are T-shaped with a narrow front and a wide back. The bracket is L-shaped. An oblong mounting hole penetrating from front to back is provided on the front side of the upper part of the bracket. Connecting bolts with connecting nuts screwed on after passing through the mounting holes at the front ends are installed in the mounting grooves. A calibration cover is fixedly installed on the upper front side of the bracket, and the lower part of the gas detector is fixedly installed in the calibration cover. The air inlet pipe is fixedly connected between the calibration cover and the gas collecting pipe.

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