CN212341160U - Online detection device of combustible gas detector - Google Patents
Online detection device of combustible gas detector Download PDFInfo
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- CN212341160U CN212341160U CN202021072925.4U CN202021072925U CN212341160U CN 212341160 U CN212341160 U CN 212341160U CN 202021072925 U CN202021072925 U CN 202021072925U CN 212341160 U CN212341160 U CN 212341160U
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Abstract
The utility model relates to an online detection device of a combustible gas detector, which comprises an annular box, a gas distribution and gas concentration analysis monitoring system, a wind speed monitoring and control system, an intelligent control system of a direction test, and a temperature and humidity monitoring and control system; the annular box is a closed annular space and is used for providing an industrial field environment for the online detection of the gas detector; the gas distribution and gas concentration analysis and monitoring system is connected with the annular box; the wind speed monitoring and controlling system is connected with the annular box; the azimuth test intelligent control system comprises an electrical control system and an azimuth test bed, wherein the azimuth test bed is a three-axis rotation test bed, and is arranged in the annular box; and the temperature and humidity monitoring and controlling system is connected with the annular box. The utility model discloses can simulate the online operational environment of combustible gas detector, carry out comprehensive technical evaluation to combustible gas detector more scientific and reasonable.
Description
Technical Field
The utility model belongs to the technical field of the safety in production, especially, relate to an online detection device of combustible gas detector.
Background
With the increasing importance of the country on safety production, the safety monitoring requirements on combustible gas are higher and higher, and especially the safety monitoring requirements on areas where a large amount of combustible gas possibly leaks are required to be extremely high. Therefore, the risk evaluation and dynamic monitoring technology of combustible gas is a development trend of safe production management.
According to the national GB15322 standard, the technical requirements of the gas test method of the combustible gas detector relate to an automatic gas distribution and inspection device which can be combined statically and dynamically in the actual calibration and inspection work. The traditional detection method can be only carried out in a static state, has poor stability, can only ensure the detection of gas concentration, can not realize the ambient wind speed, and can not be carried out according to the tests of national standard alarm action values, high-speed airflow, working temperature and the like, so that the whole quality inspection project and type evaluation test of the combustible gas detector can not be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an online detection device of combustible gas detector can simulate the online operational environment of combustible gas detector, carries out comprehensive technical evaluation to combustible gas detector more scientific and reasonable.
The utility model provides an online detection device of a combustible gas detector, which comprises an annular box, a gas distribution and gas concentration analysis monitoring system, a wind speed monitoring and control system, an intelligent control system of a direction test, and a temperature and humidity monitoring and control system;
the annular box is a closed annular space and is used for providing an industrial field environment for the online detection of the gas detector;
the gas distribution and gas concentration analysis and monitoring system is connected with the annular box and is used for injecting standard gas into the annular box and carrying out real-time dynamic monitoring and gas concentration adjustment on the injected standard gas so as to enable the gas concentration in the annular box to reach a set value;
the wind speed monitoring and controlling system is connected with the annular box and used for providing air inlet into the annular box and monitoring and controlling wind speed so as to simulate the wind speed environment of an industrial field;
the intelligent control system for the azimuth test comprises an electrical control system and an azimuth test bed, the azimuth test bed is a three-axis rotation test bed, and the azimuth test bed is arranged in the annular box and used for carrying out the azimuth test of the gas detector under the control of the electrical control system;
the temperature and humidity monitoring and controlling system is connected with the annular box and used for monitoring and controlling the temperature and humidity environment in the annular box so as to simulate the temperature and humidity environment of an industrial field.
Further, the gas distribution and gas concentration analysis and monitoring system comprises a standard gas storage tank, a pressure reducing valve, a quantitative sample injection valve, a gas sample injection instrument and a gas analyzer; the standard gas storage tank is connected with a gas inlet of the annular box through the pressure reducing valve and the quantitative sampling valve; the gas sample injection instrument is connected with the quantitative sample injection valve; the gas analyzer is connected with the gas collecting port of the annular box and the gas sample injection instrument and used for analyzing the sampled gas, feeding back an analysis result to the gas sample injection instrument in a closed loop mode, and controlling the sample injection amount of the quantitative sample injection valve through the gas sample injection instrument so as to reach a set gas concentration value.
Furthermore, the gas distribution and gas concentration analysis and monitoring system also comprises an exhaust electromagnetic valve connected with the exhaust port of the annular box.
Further, the gas analyzer is an infrared gas analyzer.
Furthermore, the wind speed monitoring and control system comprises an anemoscope, a digital wind meter and a variable frequency fan, wherein the anemoscope is arranged inside the annular box, and the digital wind meter is arranged outside the annular box and connected with the anemoscope; the variable frequency fan is connected with the outer wall of the annular box in a sealing mode and used for controlling the air speed of the air in the annular box according to the air speed information fed back by the digital air gauge.
Further, the temperature and humidity monitoring and control system comprises a temperature and humidity sensor, a gas processing box, a humidifier, a refrigerating unit and a temperature and humidity control system; the temperature and humidity sensor is arranged in the annular box; the gas treatment box is arranged at the lower part in the annular box, and an evaporator and a heater are arranged in the gas treatment box; the humidifier and the refrigerating unit are arranged outside the annular box and are connected with the gas processing box in the annular box; the temperature and humidity control system is connected with the temperature and humidity sensor, the evaporator, the heater, the humidifier and the refrigerating unit and used for controlling the temperature and humidity in the annular box by controlling the starting and stopping of the evaporator, the heater, the humidifier and the refrigerating unit according to temperature and humidity information fed back by the temperature and humidity sensor.
Furthermore, a visual window is arranged at the position of the annular box corresponding to the azimuth test bed.
Furthermore, the inner layer of the annular box body is made of a stainless steel plate, and the outer surface of the annular box body is a plastic-coated steel plate.
Furthermore, the annular box is provided with a heat preservation layer, and the heat preservation layer is arranged between the inner layer and the outer surface of the box body of the annular box.
Furthermore, the heat-insulating layer is made of superfine glass wool boards.
Borrow by above-mentioned scheme, through the online detection device of combustible gas detector, have following technological effect:
1) the industrial field environment of the gas detector can be simulated;
2) the continuous adjustment of the gas concentration in the annular closed body is realized by adopting a dynamic gas distribution method based on the combination of a gas sample injection instrument and an infrared gas analyzer;
3) the integrated measurement of the alarm action value of the combustible gas detector under the environments of high and low temperature, constant damp and heat, high-speed airflow and the like is realized by simulating the online working environment of the combustible gas detector;
4) the automatic detection of alarm action values of the combustible gas detector in different directions at the same wind speed is realized through the three-dimensionally adjustable direction test bed;
5) different batches of products and multiple products can be tested simultaneously in the test box, so that the traditional manual single-station detection mode is changed, and the test efficiency is greatly improved;
6) the limitation that the existing gas sensor can only carry out the wind speed influence test at zero gas is broken through, a feasible test means and a new idea are provided for the wind speed influence test required in type evaluation and quality inspection, a stable wind speed environment and a stable gas concentration are provided, and the method is more standard and scientific.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made of preferred embodiments of the present invention.
Drawings
Fig. 1 is a schematic structural diagram of the online detection device for a combustible gas detector of the present invention.
Reference numbers in the figures:
11-a ring box; 12-a visual window; 13-gas extraction port; 14-a gas inlet; 15-box door
21-standard gas storage tank; 22-a pressure relief valve; 23-a quantitative sample injection valve; 24-gas sample injection instrument; 25-a gas analyzer;
31-an anemometer; 32-digital wind meter; 33-a variable frequency fan;
41-orientation test bed; 42-an electrical control system;
51-a temperature and humidity sensor; 52-temperature and humidity control system; 53-a refrigeration unit; 54-a humidifier; 55-gas treatment tank; 551-an evaporator; 552-heater.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, the embodiment provides an online detection device for a combustible gas detector, which includes an annular box 11, a gas distribution and concentration analysis monitoring system, a wind speed monitoring and control system, an intelligent azimuth test control system, and a temperature and humidity monitoring and control system;
the annular box 11 is a closed annular space and is used for providing an industrial field environment for the online detection of the gas detector;
the gas distribution and gas concentration analysis and monitoring system is connected with the annular box 11 and is used for injecting standard gas into the annular box 1 and carrying out real-time dynamic monitoring and gas concentration adjustment on the injected standard gas so as to enable the gas concentration in the annular box to reach a set value;
the wind speed monitoring and controlling system is connected with the annular box 11 and is used for providing air inlet into the annular box 11 and monitoring and controlling wind speed so as to simulate the wind speed environment of an industrial field;
the azimuth test intelligent control system comprises an electrical control system 42 and an azimuth test bed 41, wherein the azimuth test bed 41 is a three-axis rotation test bed, and the azimuth test bed 41 is arranged in the annular box and used for carrying out an azimuth test on the gas detector under the control of the electrical control system;
the temperature and humidity monitoring and controlling system is connected with the annular box 11 and used for monitoring and controlling the temperature and humidity environment in the annular box 11 so as to simulate the temperature and humidity environment of an industrial field.
In this embodiment, the gas distribution and gas concentration analyzing and monitoring system includes a standard gas storage tank 21, a pressure reducing valve 22, a quantitative sample injection valve 23, a gas sample injector 14, and a gas analyzer 25; the standard gas storage tank 21 is connected with a gas inlet 14 of the annular box 11 through a pressure reducing valve 22 and a quantitative sampling valve 23; the gas sample injector 14 is connected with a quantitative sample injection valve 23; the gas analyzer 25 is connected with the gas sampling port 13 of the annular box 11 and the gas sample injector 14, and is used for analyzing the sampled gas, feeding back the analysis result to the gas sample injector 14 in a closed loop manner, and controlling the sample injection amount of the quantitative sample injection valve 23 through the gas sample injector 14 so as to achieve the set gas concentration value.
In this embodiment, the system for analyzing and monitoring the distribution of gas and the concentration of gas further comprises an exhaust solenoid valve connected to the exhaust port of the ring box 11.
In the present embodiment, the gas analyzer 25 is an external gas analyzer.
In this embodiment, the wind speed monitoring and controlling system includes an anemoscope 31, a digital wind meter 32, and a variable frequency fan 33, wherein the anemoscope 31 is disposed inside the annular box 11, and the digital wind meter 32 is disposed outside the annular box 11 and connected to the anemoscope 32; the variable frequency fan 33 is hermetically connected with the outer wall of the annular box 11 and is used for controlling the air speed of the air in the annular box 11 according to the air speed information fed back by the digital air gauge 32.
In this embodiment, the temperature and humidity monitoring and controlling system includes a temperature and humidity sensor 51, a gas processing box 55, a humidifier 54, a refrigerating unit 53, and a temperature and humidity controlling system 52; the temperature and humidity sensor 51 is arranged at the lower part in the annular box 11; the gas processing box 55 is arranged in the annular box 11, and an evaporator 551 and a heater 552 are arranged in the gas processing box 55; the humidifier 54 and the refrigerating unit 53 are arranged outside the annular box 11 and connected with a gas processing box 55 in the annular box; the temperature and humidity control system 52 is connected to the temperature and humidity sensor 51, the evaporator 551, the heater 552, the humidifier 54 and the refrigerating unit 53, and is configured to control the temperature and humidity in the ring box 11 by controlling the start and stop of the evaporator 551, the heater 552, the humidifier 54 and the refrigerating unit 53 according to the temperature and humidity information fed back by the temperature and humidity sensor 51.
In this embodiment, the ring box 11 is provided with a visual window 12 at a position corresponding to the orientation test stand 41 for easy observation.
In the embodiment, the inner layer of the annular box 11 is made of stainless steel plate, and the outer surface is plastic-coated steel plate. Is firm and durable.
In this embodiment, the annular box 11 is provided with a heat insulating layer, and the heat insulating layer is arranged between the inner layer and the outer surface of the box body of the annular box 11. Is beneficial to keeping the stability of the environment in the box body.
In this embodiment, the heat preservation layer is made of superfine glass wool board, and the heat preservation effect is good.
The following provides a more detailed description of the various systems of the present invention.
1. Ring-shaped box
The annular box is a closed annular space, adopts a closed annular air flow cylinder box body, and is internally provided with a rectifying grid and a flow guide plate. The box body is made of a heat-insulating material of a superfine glass wool board, and a stainless steel plate is arranged inside the box body; the outer surface is a plastic coated steel plate.
2. Gas distribution and gas concentration analysis monitoring system
The system mainly comprises high-purity standard combustible gas (such as standard methane gas), a gas sample injection instrument, a gas analyzer and other main equipment.
The gas distribution system adopts a dynamic gas distribution method based on the combination of a gas sample injection instrument and an infrared gas analyzer, and realizes the continuous adjustment of the gas concentration in the annular closed body. The high-purity standard gas enters a gas sample injector 24 through a pressure reducing valve 22, the gas sample injector 24 is operated to set a gas concentration value (a target set value in a box body), the gas sample injector 24 injects the gas through a accurately controlled quantitative sample injection valve 23, the high-purity standard gas is injected into an annular box 11 through the lower part of the box body, the gas concentration in the box body is gradually increased at a certain gas inlet speed, a variable frequency fan 33 uniformly stirs the gas in the box body at a certain gas flow speed, then an infrared gas analyzer collects the gas from a gas collection port 13 at an operation table for placing a combustible gas detector in the annular box 11 for analysis, the gas is fed back to the gas sample injector 24 in a closed loop mode, the sample inlet amount of the quantitative sample injection valve 23 is controlled, the set gas concentration value is monitored, supplemented and maintained at any time. After the test is finished, the gas in the box body is discharged by controlling the exhaust electromagnetic valve.
3. Wind speed monitoring and control system
The wind speed is measured by the anemometer 31 arranged in the box body, transmitted to the digital wind meter 32, read and displayed, and the wind speed in the box body is monitored. The digital wind meter 32 feeds the wind speed information back to the variable frequency fan 33, the variable frequency fan 33 utilizes the quantitative corresponding relation between the variable frequency rotating speed and the wind speed to realize the continuous adjustment of the wind speed, and meanwhile, the connection part of the variable frequency fan and the box body is sealed to ensure the sealing performance of the whole box body. Therefore, the control of the wind speed of the combustible gas in the annular closed space is realized, and the wind speed of the industrial field environment is simulated.
4. Intelligent control system for azimuth test
The azimuth test bed 41 is arranged at the position of the visual window 12 of the annular box 11 and is mainly used for detector azimuth test, an electrical control system 42 outside the box body is connected to the test bed in the box through signal lines so as to supply power, control and information feedback to the rotating test bed, and the test bed is controlled to rotate on X, Y, Z three axes according to the needed rotation angle. When the test is not performed, the turntable can be taken out of the box through the box door 15. The test bed adopts a three-phase stepping motor, and the stepping motor is utilized to convert an electric pulse signal into an angle quantity so as to realize the automation of the test. The test operation of the combustible gas detector in different directions can be easily realized through the external control of the box body, and the inconvenience and the brought deviation of manual operation are avoided.
5. Temperature and humidity monitoring and control system
The temperature and humidity are measured by a temperature and humidity sensor 51 arranged in the box body, and are transmitted to a temperature and humidity display in a temperature and humidity control cabinet (system), so that the monitoring of the temperature and the humidity in the box body is realized. The gas processing box 55 is arranged at the lower part of the closed loop box body, consists of a box body, a heater, a low-temperature evaporator, a dehumidification evaporator and the like, and is connected with an external humidifier and a refrigeration unit. The temperature and humidity control cabinet realizes the control of the temperature and humidity environment in the annular box body by controlling the gas processing box, and simulates the temperature and humidity of the industrial field environment.
Through the online detection device of the combustible gas detector, standard gases with different concentrations can be configured as required, and dynamic monitoring and gas concentration adjustment are carried out in real time. The annular box can provide safe inclosed on-spot distribution unit, and the box combines professional high and low temperature technique and variable frequency control wind speed, and rate adjustment temperature, humidity, wind speed, combustible gas concentration that can be stable in the testing process are as an organic whole to multiple functions such as distribution, concentration real-time supervision, low temperature, high temperature, invariable damp and hot, invariable wind speed, position, can simulate combustible gas detector online operational environment, carry out comprehensive technical evaluation to the alarm more scientifically rationally. The method has the following technical effects:
(1) the industrial field environment of the gas detector can be simulated.
The traditional method is that standard gas with different concentrations is prepared through a gas diluter, then the gas is led into a detector through a calibration cover of the detector, and the indication value of the detector is compared with the standard gas. The traditional method mainly depends on manual control, has low cost, consumes manpower and material resources, cannot ensure gas supply in the environment with certain air speed, has far different inspection conditions from the actual use condition, and cannot finish some experiments by manual control.
The utility model discloses an online environment has been simulated, and the detector has reappeared combustible gas detector's industrial field environment at certain wind speed, gas concentration, weather environment test alarm action value. The detection system is a set of device capable of realizing comprehensive automatic type detection on the combustible gas detector. By analyzing the key data points of each module to be tested and selecting the most direct diagnosis mechanism, the effective and practical test result can be obtained quickly and accurately.
(2) The continuous adjustment of the gas concentration in the annular closed body is realized by a dynamic gas distribution method based on the combination of a gas sample injection instrument and an infrared gas analyzer.
The gas concentration in the test chamber is continuously monitored by an infrared gas analyzer matched in the system, and then the gas is fed back to the gas sample injection instrument in a closed loop manner, so that the set gas concentration value can be monitored, supplemented and maintained at any time, and the continuous adjustment of the gas concentration in the annular closed body is realized; the traditional one-way gas distribution controlled manually is changed, and the gas supply mode is changed from a calibration cover gas supply method to natural diffusion type gas supply.
(3) By simulating the online working environment of the combustible gas detector, the integrated measurement of the alarm action value of the combustible gas detector under the environments of high and low temperature, constant damp and heat, high-speed airflow and the like is realized.
The traditional detection device cannot realize the simulation of the parameters in the same space at the same time, the box body of the detection device adopts an annular closed structure, a stable and reliable environment is provided for the test, and the measurement of the alarm action value of the detector in a continuously adjustable climatic environment and a continuously adjustable wind speed environment is realized through a control method of the combustible gas wind speed in the annular closed space based on a frequency conversion technology.
(4) The three-dimensional adjustable azimuth test bed realizes the automatic detection of alarm action values of the combustible gas detector in different azimuths at the same wind speed.
According to the national standard requirement, under the condition of ration wind speed, the alarm will be respectively at X, Y, Z epaxial measurement capability test, and the tradition way all adopts manually operation, not only wastes time and energy but also is unscientific, the utility model discloses a special automatic position test device, the test bench is in the box, and operation controller (electrical control system) is outside the box, and the rotation angle of test bench in the annular case can be controlled wantonly through the controller outside the case realizes that combustible gas detector is respectively at the automatic survey of X, Y, Z axis on each position warning action value. Meanwhile, the electromagnetic valve for controlling the exhaust emission of the box body and the controller for the azimuth test are concentrated on the same panel, so that the convenience of the device is improved.
(5) The efficiency is improved.
Different batches of products and multiple products can be tested simultaneously in the test box, the traditional manual single-station detection mode is changed, and the test efficiency is greatly improved.
(6) And (4) multiple functions.
The utility model discloses broken through among the prior art gas sensor and can only be at zero gas and do the experimental limitation of wind speed influence, for the wind speed influence experiment that requires provides feasible test means and new thinking in pattern evaluation and the quality inspection, existing stable wind speed environment has stable gas concentration again, and the method is more standard, scientific.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An online detection device of a combustible gas detector is characterized by comprising an annular box, a gas distribution and gas concentration analysis monitoring system, a wind speed monitoring and control system, an intelligent azimuth test control system and a temperature and humidity monitoring and control system;
the annular box is a closed annular space and is used for providing an industrial field environment for the online detection of the gas detector;
the gas distribution and gas concentration analysis and monitoring system is connected with the annular box and is used for injecting standard gas into the annular box and carrying out real-time dynamic monitoring and gas concentration adjustment on the injected standard gas so as to enable the gas concentration in the annular box to reach a set value;
the wind speed monitoring and controlling system is connected with the annular box and used for providing air inlet into the annular box and monitoring and controlling wind speed so as to simulate the wind speed environment of an industrial field;
the intelligent control system for the azimuth test comprises an electrical control system and an azimuth test bed, the azimuth test bed is a three-axis rotation test bed, and the azimuth test bed is arranged in the annular box and used for carrying out the azimuth test of the gas detector under the control of the electrical control system;
the temperature and humidity monitoring and control system is connected with the annular box and used for monitoring and controlling the temperature and humidity environment in the annular box so as to simulate the temperature and humidity environment of an industrial field.
2. The on-line detection device of a combustible gas detector according to claim 1, wherein the gas distribution and gas concentration analysis monitoring system comprises a standard gas storage tank, a pressure reducing valve, a quantitative sample injection valve, a gas sample injector and a gas analyzer; the standard gas storage tank is connected with a gas inlet of the annular box through the pressure reducing valve and the quantitative sampling valve; the gas sample injection instrument is connected with the quantitative sample injection valve; the gas analyzer is connected with the gas collecting port of the annular box and the gas sample injection instrument and used for analyzing the sampled gas, feeding back an analysis result to the gas sample injection instrument in a closed loop mode, and controlling the sample injection amount of the quantitative sample injection valve through the gas sample injection instrument so as to reach a set gas concentration value.
3. The on-line combustible gas detector device of claim 2 wherein the gas distribution and gas concentration analysis monitoring system further comprises an exhaust solenoid valve connected to the annular tank exhaust port.
4. The on-line detection device of a combustible gas detector according to claim 2, wherein the gas analyzer is an infrared gas analyzer.
5. The on-line detection device for the combustible gas detector according to claim 1, wherein the wind speed monitoring and control system comprises an anemometer, a digital wind meter and a variable frequency fan, the anemometer is arranged inside the annular box, and the digital wind meter is arranged outside the annular box and connected with the anemometer; the variable frequency fan is connected with the outer wall of the annular box in a sealing mode and used for controlling the air speed of the air in the annular box according to the air speed information fed back by the digital air gauge.
6. The on-line detection device of the combustible gas detector according to claim 1, wherein the temperature and humidity monitoring and control system comprises a temperature and humidity sensor, a gas processing box, a humidifier, a refrigerating unit and a temperature and humidity control system; the temperature and humidity sensor is arranged in the annular box; the gas treatment box is arranged at the lower part in the annular box, and an evaporator and a heater are arranged in the gas treatment box; the humidifier and the refrigerating unit are arranged outside the annular box and are connected with the gas processing box in the annular box; the temperature and humidity control system is connected with the temperature and humidity sensor, the evaporator, the heater, the humidifier and the refrigerating unit and used for controlling the temperature and humidity in the annular box by controlling the starting and stopping of the evaporator, the heater, the humidifier and the refrigerating unit according to temperature and humidity information fed back by the temperature and humidity sensor.
7. The on-line detection device of a combustible gas detector according to claim 1, wherein a visible window is arranged at the position of the annular box corresponding to the orientation test bed.
8. The on-line detection device of a combustible gas detector according to claim 1, wherein the inner layer of the annular box body is made of stainless steel plate, and the outer surface of the annular box body is plastic-coated steel plate.
9. The on-line detection device of a combustible gas detector according to claim 8, wherein the annular box is provided with an insulating layer, and the insulating layer is arranged between the inner layer and the outer surface of the annular box body.
10. The on-line detection device of a combustible gas detector according to claim 9, wherein the heat insulation layer is made of ultra-fine glass wool board.
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| CN114733584A (en) * | 2022-05-09 | 2022-07-12 | 西安交通大学 | Extreme climate simulation experiment device and method for high-voltage switch operating mechanism |
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