A gas detection device for dangerous chemical accidents

Abstract

The present invention relates to the technical field of gas detection, and provides a gas detection device for dangerous chemical accidents. By placing the device in the measured environment and starting the suction pump, the target gas enters the filter through the air inlet, and dust and impurities in the air are filtered out. Then, it passes through the suction pump and the multi-way connector and reaches each gas sensor and each test paper reactor. The gas sensor generates an electrical signal by sensing the type and concentration of the target gas, and sends the electrical signal to the information processing module. The test paper reactor converts the read color signal into an electrical signal and sends it to the information processing module. The information processing module obtains a calculation result through calculation and processing of the electrical signal, and sends a corresponding instruction to the early warning module. The early warning module makes corresponding early warnings according to the instruction. The present invention solves the problems in the related technologies such as insufficient types of detected gases, inaccurate categories, low stability and reliability, and unclear risk alarm strategies, classification and grading indications, and tactical associations.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and particularly to a gas detection device for dangerous chemical accidents. Background Art

[0002] There are a wide variety of dangerous chemicals. The leakage substances at the accident site are prone to deliquescence, pyrolysis, spontaneous combustion, and combustion explosion reactions, with diverse products and complex physical and chemical properties. According to statistics, the fire and rescue teams in China handle more than 18,000 various dangerous chemical accidents every year, involving more than 120 types of dangerous chemicals with frequent accidents, especially the number of major and extremely serious accidents and casualties showing an upward trend. Due to the lack of special gas detection and inspection equipment for fire and rescue in dangerous chemical accidents, at present, front-line fire and rescue teams still use metering gas detection instruments applicable to safety inspections during the production process of industrial enterprises as the technical means for gas detection and inspection at the accident rescue site, which are difficult to meet the actual combat requirements of diverse, complex, and harsh sites. The main problems are as follows: the detection spectrum of the instrument is insufficient, and there are serious gaps in the coverage of gas types; the single numerical indication of the instrument-type detection causes great obstacles and confusion for firefighters to remember and understand, and it is difficult to associate with clear rescue tactical behaviors; the alarm threshold strategy based on the HSE standard of industrial enterprise employees is not suitable for the on-site operations of the first batch of emergency response firefighters in accidents. Specifically, the current gas detectors cannot accurately measure the types of target gases. For example, gases such as sulfur dioxide, chlorine, and sulfides can all make the electrochemical sensor receive similar indication signals, and the types of toxic gases cannot be effectively detected. On the other hand, the stability and sensitivity of the current gas detectors vary, and they cannot accurately issue early warnings in the case of the failure of the detection unit, resulting in excessive measurement errors or even failures. Moreover, there are usually no backup measures when the detection unit fails, resulting in insufficient stability and reliability of the detection instrument. Summary of the Invention

[0003] In view of this, it is necessary to provide a gas detection device that can more accurately detect the types and concentrations of dangerous gases in the presence of multiple dangerous gases, achieve danger warnings and failure warnings, and improve the stability and reliability of the detection instrument, aiming at the problems that traditional gas detectors cannot accurately measure the types of target gases and are prone to large measurement errors or failures.

[0004] To achieve the object of the invention, a gas detection device for dangerous chemical accidents is provided, and the device includes:

[0005] An air inlet, a filter, a suction pump, a pipeline, a multi-way connector, at least two gas sensors, an information processing module, and a warning module;

[0006] The multi-way connector includes at least three interfaces. The air inlet, the filter, the suction pump, and the multi-way connector are sequentially connected through the pipeline. The gas sensor is connected to the multi-way connector through a pipeline respectively, and the gas sensor is electrically connected to the information processing module. The warning module is electrically connected to the information processing module.

[0007] Further, there are several test strip reactors and several chemical test strips. The test strip reactors are respectively connected to the multi-way connector through pipelines, and the chemical test strips are arranged inside the test strip reactors. The chemical test strips adopt at least two different types.

[0008] Further, the chemical test strip adopts a combined test strip, and the combined test strip is synthesized by at least two different types of chemical test strips.

[0009] Further, the number of the test strip reactors is at least two;

[0010] The device further includes at least two air valves, which are respectively arranged on the pipelines between the test strip reactors and the multi-way connector, and the air valves are respectively electrically connected to the information processing module.

[0011] Further, the information processing module includes a failure detection unit and a control unit. The failure detection unit is respectively electrically connected to the gas sensor and the test strip reactor, and is used to detect whether the gas sensor and / or the chemical test strip fails. The control unit is respectively electrically connected to the air valve and is used to send instructions to the air valve.

[0012] Further, the gas sensor includes: an electrochemical sensor, a catalytic combustion sensor, a photoionization sensor;

[0013] Or, an electrochemical sensor, a semiconductor sensor, a photoionization sensor.

[0014] Further, it further includes a wireless data transmission module, which is electrically connected to the information processing module and is used to send transmission data to a remote terminal. The working frequency band of the wireless data transmission module is 410 - 510 MHz.

[0015] Further, it further includes a positioning module, which is electrically connected to the information processing module, and the positioning module is used to perform satellite positioning and / or inertial navigation positioning on the device.

[0016] Further, the warning module includes: several indicator lights, a buzzer, a vibrator, and the indicator lights, the buzzer, and the vibrator are respectively electrically connected to the information processing module.

[0017] Furthermore, it further includes auxiliary equipment, and the auxiliary equipment includes: a housing, a display module, a setting module, a mobile power source, and an exhaust hole; the housing is a semi-sealed structure for supporting and protecting other parts of the equipment, an outer port of the air inlet is arranged on one side of the housing and an inner space of the air inlet is connected to the external atmosphere, the display module includes a display screen, the display screen is arranged outside the housing, the setting module includes a button, the button is arranged outside the housing, the mobile power source includes a rechargeable battery pack and a charging contact, the rechargeable battery pack is arranged inside the housing, the charging contact penetrates through the outside of the housing, the display module, the setting module, and the mobile power source are respectively electrically connected to the information processing module, and the exhaust hole penetrates through the housing and is respectively connected to the gas sensor through a pipeline.

[0018] The technical solution provided by the embodiment of the present invention at least brings the following beneficial technical effects:

[0019] The present invention provides a gas detection device for dangerous chemical accidents. Compared with the related art, it can more accurately detect the types and concentrations of dangerous gases in the presence of multiple dangerous gases, and achieve dangerous warning and failure warning, while improving the stability and reliability of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a gas detection device for dangerous chemical accidents provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of another gas detection device including a test paper reactor provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of a combined test paper provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of another gas detection device including a gas valve provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic structural diagram of another gas detection device including a wireless data transmission module and a positioning module provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of another gas detection device including equipment such as a housing provided by an embodiment of the present invention;

[0026] REFERENCE SIGNS:

[0027] Air inlet - 1, filter - 2, suction pump - 3, multi - way connector - 4, at least two gas sensors - 5, information processing module - 6, early warning module - 7, test strip reactor - 8, chemical test strip - 9, air valve - 10, wireless data transmission module - 11, positioning module - 12, indicator light - 13, buzzer - 14, combined test strip - 15, housing - 16, exhaust hole - 17, display screen - 18, key - 19, charging contact - 20. Detailed implementation

[0028] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The terms "first", "second", etc. in the description and claims of the present invention and the drawings are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present invention described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps S or units does not necessarily have to be limited to those clearly listed steps S or units, but may include other steps S and units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0029] To enable those skilled in the art to better understand the solution of the present invention, the following clearly and completely describes the solution in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0030] Embodiment

[0031] An embodiment of the present invention provides a gas detection device for dangerous chemical accidents, as Figure 1 shown, including:

[0032] Air inlet 1, filter 2, suction pump 3, pipeline, multi - way connector 4, at least two gas sensors 5, information processing module 6, early warning module 7;

[0033] The multi - way connector 4 includes at least three interfaces. The air inlet 1, the filter 2, the suction pump 3 and the multi - way connector 4 are sequentially connected through the pipeline, the gas sensors 5 are respectively connected to the multi - way connector 4 through pipelines, the gas sensors 5 are electrically connected to the information processing module 6, and the early warning module 7 is electrically connected to the information processing module 6.

[0034] It should be noted that preferably, the housing 16 is made of high-strength engineering plastic or composite anti-slip rubber; the filter element 2 of the filter is made of expanded polytetrafluoroethylene material, which is used to filter larger particles in the air to prevent dust from contaminating devices such as the suction pump 3, pipeline, multi-way connector 4, gas sensor 5, etc., thus avoiding inaccurate measurement or failure of the detection device; the pipeline and multi-way connector 4 are made of materials with strong corrosion resistance such as rubber and plastic, which can improve the reliability of the detection device; the gas sensor 5 includes at least two different types of sensors, and includes sensors that can respectively identify toxic gases and flammable gases, and can measure the concentrations of toxic gases and flammable gases; preferably, the gas sensor 5 further includes a sensor for measuring oxygen concentration; preferably, the gas sensor 5 includes a gas sensor 5 body and a sensor seat, the sensor body is detachably installed with the sensor seat, and the positions of the at least two gas sensors 5 can be freely set according to actual needs.

[0035] Optionally, the information processing module 6 includes a drive circuit board and a microprocessor, and the microprocessor is arranged on the drive circuit board; the microprocessor includes embedded software, and the embedded software is used to make the microprocessor read the input induction signal, calculate the result and send an instruction signal according to a predetermined software program.

[0036] Among them, the warning module 7 includes a danger warning unit and a failure warning unit. The danger warning unit is used to warn of the leakage of dangerous gases, and the failure warning unit is used to warn of the occurrence of the situation where the detection device fails. Preferably, the danger warning unit includes a primary warning unit and a secondary warning unit, which are used to set warnings with different danger levels according to the types and / or concentrations of different dangerous gases. Among them, the danger warning unit can also include warning units above the secondary level, which are not limited here. Preferably, for the detection of toxic gases, the warning module sets two-level detection alarms based on the IDLH value of "immediately dangerous to life or health concentration"; for oxygen detection, two-level detection alarms are set on the oxygen-deficient side.

[0037] In the specific implementation process, place the detection device in the environment to be measured, start the suction pump 3. The target gas enters through the air inlet 1, and the dust and impurities in the air are filtered out by the filter 2, and then pass through the suction pump 3 and the multi-way connector 4, and then reach each gas sensor 5. The gas sensor 5 generates an electrical signal by sensing the type and concentration of the target gas, and sends the electrical signal to the information processing module 6. The information processing module 6 obtains a calculation result through the calculation and processing of the electrical signal, and sends a corresponding instruction to the warning module 7. The warning module 7 makes corresponding warnings according to this instruction. For example, when no dangerous gas is detected, the warning module 7 prompts safety. When a toxic gas is detected, the warning module 7 prompts toxicity and makes a first-level warning or a second-level warning according to the concentration of the toxic gas. When a flammable gas is detected, the warning module 7 prompts flammability and makes a first-level warning or a second-level warning according to the concentration of the flammable gas.

[0038] It can be seen that in the embodiment of the present invention, compared with the related art, it can more accurately identify flammable gases and toxic gases in the presence of multiple dangerous gases, and realize danger warnings and failure warnings, while improving the stability and reliability of the detection device.

[0039] In a preferred embodiment, the gas sensor 5 includes an oxygen sensor, and the oxygen sensor is used to detect the oxygen content in the gas, with 250 ppm as the judgment threshold.

[0040] Specifically, since the combustion of substances requires oxygen, if there is oxygen leakage in the environment to be measured, the possibility of fire will increase. If the air contains combustible gas at the same time, it is very easy to explode. Therefore, it is very necessary to test the oxygen leakage.

[0041] In the embodiment of the present invention, by using an oxygen sensor to detect the oxygen concentration, the application range of the detection device can be effectively improved, and the safety and reliability are also improved.

[0042] In a preferred embodiment, the detection device further includes a plurality of test paper reactors 8 and a plurality of chemical test papers 9. The test paper reactors 8 are respectively connected to the multi-way connector 4 through pipelines, and the chemical test papers 9 are arranged inside the test paper reactors 8. The chemical test papers 9 adopt at least two different types, such as Figure 2 shown.

[0043] It should be noted that the chemical test paper 9 is a commonly used chemical test paper 9, including at least two of the following test papers: pH test paper, starch potassium iodide test paper, red litmus test paper, blue litmus test paper, lead acetate test paper, magenta test paper, phenolphthalein test paper, etc. Among them, the pH test paper is used to roughly detect the acidity and alkalinity of the target gas; the starch potassium iodide test paper is used to detect strong oxidizing substances and their contents in the target gas; the red litmus test paper is used to detect acidic substances and their acidity and alkalinity in the target gas; the blue litmus test paper is used to detect acidic substances and their acidity and alkalinity in the target gas; the lead acetate test paper is used to detect sulfides and their concentrations in the target gas; the magenta test paper is used to detect bleaching substances and their concentrations in the target gas; the phenolphthalein test paper is mainly used to detect ammonia and its concentration in the target gas.

[0044] Among them, the test paper reactor 8 includes a color reader, and the color reader is used to scan the chemical detection setting and read its color.

[0045] In the specific implementation process, the suction pump 3 is started, and the target gas passes through the air inlet 1, the filter 2, the suction pump 3, and then reaches each gas sensor 5 and each test paper reactor 8 through the pipelines of the respective connection ports on the multi-way connector 4. The gas sensor 5 generates an electrical signal by sensing the type and concentration of the target gas, and sends the electrical signal to the information processing module 6. The test paper reactor 8 converts the read color signal into an electrical signal and sends it to the information processing module 6. The information processing module 6 obtains a calculation result through calculation and processing of the electrical signal, and sends a corresponding instruction to the warning module 7. The warning module 7 gives a corresponding warning according to this instruction.

[0046] It can be seen that in the embodiment of the present invention, compared with the prior art, the automated airborne pollen on-line observation device has at least the following technical effects: by using a plurality of test paper reactors 8 and a plurality of chemical test papers 9 to detect the target gas, it is possible to more accurately detect the types and concentrations of dangerous gases in the presence of multiple dangerous gases, while improving the stability and reliability of the detection device and enhancing the user experience.

[0047] In a preselected embodiment, the chemical test paper 9 uses a combined test paper 15, and the combined test paper 15 is synthesized by using at least two different types of chemical test papers 9, as Figure 3 shown.

[0048] Specifically, the combined test strip 15 is synthesized by using at least two different types of chemical test strips 9. For example, a pH test strip, a starch potassium iodide test strip, a lead acetate test strip, a fuchsin test strip, and a phenolphthalein test strip are synthesized into a combined test strip 15, and each part occupies one-fifth. Among them, the test strip reactor 8 includes 5 color readers; the color readers are sequentially aligned with each chemical test strip 9 in a preset order, scan and read its color.

[0049] In the embodiment of the present invention, synthesizing multiple different types of chemical test strips 9 into a combined test strip 15 can effectively utilize the test strip reactor 8, that is, the test strip reactor 8 can be used as little as possible, simplifying the redundancy of the device and saving costs while ensuring efficiency.

[0050] In a preferred embodiment, the number of the test strip reactors 8 is at least two; the device further includes at least two air valves 10, and the air valves 10 are respectively arranged on the pipelines between the test strip reactors 8 and the multi-way connector 4, and the air valves 10 are respectively electrically connected to the information processing module 6, as Figure 4 shown.

[0051] In the specific implementation process, since the chemical test strip 9 is a disposable device and is extremely prone to failure, in order to use the detection device multiple times in a single hazardous chemical accident, it is necessary to design a spare chemical test strip 9. Therefore, air valves 10 are respectively arranged on the pipelines between each test strip reactor 8 and the multi-way connector 4. The air valves 10 are normally closed, and the multiple air valves 10 are respectively electrically connected to the information processing module 6. When the information processing module 6 receives a signal that a certain chemical test strip 9 fails, it sends an instruction to open the air valve 10 to the next air valve 10 in a preset manner. After receiving the instruction, the air valve 10 opens, and the corresponding test strip reactor 8 starts to work. After the test strip reactor 8 fails, the above steps are repeated to make another spare test strip reactor 8 start to work.

[0052] In the embodiment of the present invention, by using at least two test strip reactors 8 and respectively arranging air valves 10 on the pipelines between each test strip reactor 8 and the multi-way connector 4, the use convenience and reliability of the detection device can be improved, and the user experience can be enhanced.

[0053] In a preferred embodiment, the information processing module 6 includes a failure detection unit and a control unit. The failure detection unit is respectively electrically connected to the gas sensor 5 and the test strip reactor 8, and is used to detect whether the gas sensor 5 and / or the chemical test strip 9 fails. The control unit is respectively electrically connected to the air valve 10 and is used to send instructions to the air valve 10.

[0054] During the specific implementation process, due to reasons such as the chemical detection test strip 9 being a disposable device and the gas sensor 5 having insufficient stability and corrosion resistance, it is extremely prone to failure. In order to use the detection device multiple times in a single hazardous chemical accident, it is necessary to design a spare chemical detection test strip 9, and at the same time, it is necessary to prompt the user to replace the new gas sensor 5. Therefore, gas valves 10 are respectively provided on the pipelines between each test strip reactor 8 and the multi-way connector 4. The gas valves 10 are normally closed, and the multiple gas valves 10 are respectively electrically connected to the information processing module 6. When the information processing module 6 receives a signal that a certain chemical detection test strip 9 has failed, it sends an instruction to open the gas valve 10 to the next gas valve 10 in a preset manner. After receiving the instruction, the gas valve 10 opens, and the corresponding test strip reactor 8 starts to work. After the test strip reactor 8 fails, repeat the above steps to make another spare test strip reactor 8 start to work. When the failure detection unit of the information processing module 6 detects that a gas sensor 5 has failed, it sends a gas sensor 5 failure instruction to the warning module 7 to prompt the user to replace the new gas sensor 5.

[0055] In the embodiment of the present invention, the information processing module 6 adopts a combination of a failure detection unit and a control unit, which can improve the use safety, convenience and reliability of the detection device and enhance the user experience.

[0056] In a preferred embodiment, the gas sensor 5 includes: an electrochemical sensor, a catalytic combustion sensor, and a photoionization sensor.

[0057] Specifically, the electrochemical sensor includes a potentiostatic electrolytic sensor and a galvanic cell type gas sensor 5. The potentiostatic electrolytic sensor ionizes the measured gas under a specific electric field, and the gas concentration is measured by the flowing electrolytic current. This sensor has high sensitivity, and the detected gas can be selected by changing the potential, which plays an important role in the detection of toxic gases; the galvanic cell type gas sensor 5 forms a battery with Pt—Pb or Ag—Pb electrodes in a KOH electrolyte solution and has been successfully used to detect oxygen, with high sensitivity.

[0058] The catalytic combustion sensor utilizes the principle of the thermal effect of catalytic combustion. It consists of a detection element and a compensation element paired to form a measurement bridge. Under certain temperature conditions, the flammable gas undergoes flameless combustion on the surface of the detection element carrier and under the action of the catalyst, the carrier temperature rises, and the platinum wire resistance inside it also rises accordingly, thus causing the balanced bridge to lose balance and output an electric signal proportional to the concentration of the flammable gas. By measuring the change in the resistance of the platinum wire, the concentration of the combustible gas can be known. It is mainly used for the detection of combustible gases, with good linearity of the output signal, reliable index, low price, and no cross-infection with other non-combustible gases.

[0059] The photoionization sensor, abbreviated as PID, is a highly sensitive and versatile gas detector based on photoionization technology. It can detect volatile organic compounds at extremely low concentrations from 10 ppb to relatively high concentrations of 10,000 ppm. Compared with traditional detection methods, it has the advantages of being portable, small in size, high in precision, high in resolution, fast in response, real-time, high in safety, and capable of continuous testing, providing real-time information feedback for the staff to ensure their safety.

[0060] Preferably, the gas sensor 5 employs 3 electrochemical sensors, 1 catalytic combustion sensor, and 1 photoionization sensor. The electrochemical sensors include a first electrochemical sensor, a second electrochemical sensor, and a third electrochemical sensor. The first electrochemical sensor is used to detect oxygen and its concentration change information. The second electrochemical sensor is used to detect the concentration change information of hydrogen halides such as hydrogen fluoride, sulfur dioxide, chlorine, hydrogen chloride, sulfides, and chlorides. The third electrochemical sensor is used to detect the concentration change information of cyanides such as carbon monoxide and hydrogen cyanide, and nitrogen oxides. The catalytic combustion sensor is used to detect the concentration change information of combustible gases such as methane, propane, and gasoline. The photoionization sensor 6 can detect the concentration change information of organic volatile compounds.

[0061] In a preferred embodiment, the gas sensor 5 includes: an electrochemical sensor, a semiconductor sensor, and a photoionization sensor.

[0062] Preferably, the gas sensor 5 adopts 4 electrochemical sensors, 1 semiconductor sensor, and 1 photoionization sensor. The semiconductor sensor uses a semiconductor gas-sensitive element as the sensitive element of the gas sensor 5, which is widely used in the detection of flammable gas leakage in homes and factories and is suitable for the detection of flammable gases such as methane, liquefied gas, hydrogen, and gasoline.

[0063] In the embodiment of the present invention, a combination of multiple gas sensors 5 is adopted to more accurately detect the types of dangerous gases in the presence of multiple dangerous gases, increase the coverage range of the detected dangerous gas types, and improve the spectrality of the detection.

[0064] In a preferred embodiment, the gas sensor 5 adopts a combination of six gas sensors. The combination of the six gas sensors uses 3 electrochemical sensors, 1 infrared sensor, 1 catalytic combustion sensor, and 1 photoionization sensor.

[0065] In the embodiment of the present invention, the electrochemical sensor 5 includes a first, a second, and a third electrochemical sensor. The first electrochemical sensor is used to detect and respond to the change information of the oxygen concentration at the fire accident scene. The second electrochemical sensor is used to detect and respond to the change information of the concentrations of gases such as carbon monoxide, hydrogen cyanide, nitrogen oxides, hydrogen sulfide, acrylonitrile, etc. generated by combustion at the fire accident scene. The third electrochemical sensor is used to detect and respond to the change information of the concentrations of gases such as sulfur dioxide, hydrogen chloride, hydrogen fluoride, hydrogen bromide, etc. generated by combustion at the fire accident scene. The infrared sensor is used to detect and respond to the change information of the concentration of carbon dioxide generated by combustion at the fire accident scene. The catalytic combustion sensor is used to detect and respond to the change information of the concentrations of gases such as carbon monoxide, acrolein, formaldehyde, ammonia, hydrogen sulfide, phenol, etc. and combustion aids such as gasoline, methanol, ethanol, etc. generated by combustion at the fire accident scene. The photoionization sensor is used to detect and respond to the change information of the concentrations of organic volatile substances such as nitrogen oxides, acrolein, ammonia, hydrogen sulfide, phenol, etc. and combustion aids such as gasoline, methanol, ethanol, etc. generated by combustion at the fire accident scene.

[0066] Preferably, the gas sensor 5 adopts a combination of six gas sensors. The combination of the six gas sensors adopts a combination of four electrochemical sensors, one catalytic combustion sensor, and one photoionization sensor. The positions of the six gas sensors can be interchanged.

[0067] In the embodiment of the present invention, by combining six different types of sensors, the detection of different types and different properties of gases is realized, and the broad-spectrum property and reliability of the detection device are improved.

[0068] In a preferred embodiment, the detection device further includes a wireless data transmission module 11. The wireless data transmission module 11 is electrically connected to the information processing module 6 and is used to send and transmit data to a remote terminal. The operating frequency band of the wireless data transmission module 11 is 410 - 510 MHz.

[0069] In the embodiment of the present invention, by adopting the wireless data transmission module 11 and the dedicated operating frequency band, it is convenient to realize the remote sharing and management of data and the real-time remote monitoring of the target area, reduce the danger of personnel operation, reduce the transmission interference, and improve the user experience.

[0070] In a preferred embodiment, the detection device further includes a positioning module 12. The positioning module 12 is electrically connected to the information processing module 6. The positioning module 12 is used to perform satellite positioning and / or inertial navigation positioning on the device, as Figure 5 shown.

[0071] Specifically, the positioning module 12 adopts a positioning method of GPS and / or Beidou satellite positioning and includes an antenna device for sending and receiving positioning data.

[0072] In the embodiment of the present invention, by using the positioning module 12 for satellite positioning, it is beneficial for the user to confirm the location in real time, which is convenient for identifying and remotely positioning dangerous areas and improving the user experience.

[0073] In a preferred embodiment, the warning module 7 includes: a plurality of indicator lights 13, a buzzer 14, and a vibrator, and the indicator lights 13, the buzzer 14, and the vibrator are respectively electrically connected to the information processing module 6, as Figure 6 shown.

[0074] Specifically, the indicator lights 13 include a safety indicator light, a flammable gas indicator light, a toxic gas indicator light, a failure indicator light, and a warning level indicator light. When no flammable gas and toxic gas are detected, the safety indicator light is turned on; when flammable gas is detected, the flammable gas indicator light is turned on; when toxic gas is detected, the toxic gas indicator light is turned on. When one or more gas sensors 5 send a fault, the failure indicator light is turned on; the warning level indicator lights include a first-level warning indicator light and a second-level warning indicator light. When a preset gas type is detected or a preset concentration is reached, the corresponding warning level indicator light is turned on.

[0075] Among them, the buzzer 14 and the vibrator respond accordingly according to preset conditions. For example, when the detection is completed, the buzzer 14 emits two different ringing sounds according to the detected toxic gas and flammable gas, and emits different decibel levels of sounds according to different warning levels.

[0076] In the embodiment of the present invention, the warning module 7 is convenient for the user to use in a dim or visually impaired environment by setting a plurality of indicator lights 13, a buzzer 14, and a vibrator, which improves safety and the user experience.

[0077] In a preferred embodiment, the detection device further includes auxiliary equipment, and the auxiliary equipment includes: a housing 16, a display module, a setting module, a mobile power supply, and an exhaust hole 17;

[0078] The housing 16 is a semi-sealed structure for supporting and protecting other parts of the device. The outer port of the air inlet 1 is arranged on one side of the housing 16, and the internal space of the air inlet 1 is connected to the external atmosphere. The display module includes a display screen 18, and the display screen 18 is inlaid on the outside of the housing 16. The setting module includes a button 19, and the button 19 is inlaid on the outside of the housing 16. The mobile power supply includes a rechargeable battery pack and a charging contact 20. The rechargeable battery pack is arranged inside the housing 16, and the charging contact 20 penetrates through the outside of the housing 16. The display module, the setting module, and the mobile power supply are respectively electrically connected to the information processing module 6. The exhaust hole 17 penetrates through the housing 16 and is connected to the gas sensor 5 through a pipeline respectively.

[0079] It should be noted that devices such as the filter 2, the suction pump 3, the multi-way connector 4, the gas sensor 5, the information processing module 6, the warning module 7, the pipeline, the wireless data transmission module 11, the positioning module 12, the vibrator, the display module, the setting module, and the rechargeable battery pack are all arranged inside the housing 16 for supporting and protecting such devices. The content displayed by the display module includes information such as the detected gas type and concentration value, the current warning level, the failure warning, the settable options, and the current battery level. The settable options of the setting module include the working mode, the setting options of the gas sensor 5, the setting options of the test strip reactor 8, the timed power on / off, the information remote transmission option, the satellite positioning option, etc. The setting of the exhaust hole 17 facilitates the discharge of the detected tail gas to balance the internal air pressure of the device.

[0080] Preferably, in the non-alarm state of the display module, the display module indicates "safe"; in the first-level alarm state, the indicator light 13, the buzzer 14, and the vibrator emit low-frequency light, sound, and vibration prompts, and the display module indicates "vigilant" to prompt the user to wear an air respirator for protection; in the second-level alarm state, the indicator light 13, the buzzer 14, and the vibrator emit high-frequency light, sound, and vibration prompts, and the display module indicates "evade" to prompt the user to retreat and take shelter.

[0081] In the embodiment of the present invention, through the setting of auxiliary devices, the detection device can work more stably, improving the stability, operability, use convenience, and user experience of the gas detection device.

[0082] It can be seen that the gas detection device for dangerous chemical accidents in the embodiment of the present invention has at least the following technical effects compared with the prior art: it can more accurately detect the types and concentrations of dangerous gases in the presence of multiple dangerous gases, and achieve dangerous warning and failure warning, while improving the stability and reliability of the detection device.

[0083] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A gas detection device for dangerous chemical accidents, characterized in that, it includes: an air inlet (1), a filter (2), an air suction pump (3), a multi-way connector (4), at least two gas sensors (5), an information processing module (6), an early warning module (7), a pipeline, at least two test paper reactors (8), and at least two chemical test papers (9). The test paper reactors (8) are respectively connected to the multi-way connector (4) through the pipeline. The chemical test papers (9) are arranged inside the test paper reactors (8). The chemical test papers (9) adopt combined test papers (15), and the combined test papers (15) are synthesized by using at least two different types of chemical test papers (9); the multi-way connector (4) includes at least three interfaces. The air inlet (1), the filter (2), the air suction pump (3), and the multi-way connector (4) are sequentially connected through the pipeline. The gas sensors (5) are respectively connected to the multi-way connector (4) through the pipeline. The gas sensors (5) are electrically connected to the information processing module (6), and the early warning module (7) is electrically connected to the information processing module (6); the information processing module (6) includes a failure detection unit and a control unit. The failure detection unit is respectively electrically connected to the gas sensor (5) and the test paper reactor (8) for detecting whether the gas sensor (5) and the chemical test paper (9) fail. The control unit is respectively electrically connected to the gas valve (10) for sending instructions to the gas valve (10); the gas valves (10) are respectively arranged on the pipelines between the test paper reactors (8) and the multi-way connector (4). The gas valves (10) are respectively electrically connected to the information processing module (6). The gas valves (10) are normally closed. When the information processing module (6) receives a signal that a certain chemical test paper (9) fails, it sends an instruction to open the gas valve (10) to the next gas valve (10) in a preset manner. After receiving the instruction, the gas valve (10) opens, and the corresponding test paper reactor (8) starts to work.

2. The gas detection device for dangerous chemical accidents according to claim 1, characterized in that, the gas sensor (5) includes: an electrochemical sensor, a catalytic combustion sensor, a photoionization sensor; or, an electrochemical sensor, a semiconductor sensor, a photoionization sensor.

3. The gas detection device for dangerous chemical accidents according to claim 1, characterized in that, it further includes a wireless data transmission module (11). The wireless data transmission module (11) is electrically connected to the information processing module (6) for sending and transmitting data to a remote terminal. The working frequency band of the wireless data transmission module (11) is 410 - 510 MHz.

4. The gas detection device for dangerous chemical accidents according to claim 3, characterized in that, It further includes a positioning module (12), which is electrically connected to the information processing module (6), and the positioning module (12) is used to perform satellite positioning and / or inertial navigation positioning on the device.

5. A gas detection device for hazardous chemical accidents according to claim 1, characterized in that the warning module (7) includes: a plurality of indicator lights (13), a buzzer (14), and a vibrator, and the indicator lights (13), the buzzer (14), and the vibrator are respectively electrically connected to the information processing module (6).

6. A gas detection device for hazardous chemical accidents according to claim 1, characterized in that it further includes auxiliary equipment, and the auxiliary equipment includes: a housing (16), a display module, a setting module, a mobile power supply, and an exhaust hole (17); the housing (16) is a semi-sealed structure for supporting and protecting other parts of the device, an outer port of the air inlet (1) is arranged on one side of the housing (16), and an internal space of the air inlet (1) is connected to the external atmosphere. The display module includes a display screen (18), and the display screen (18) is arranged outside the housing (16). The setting module includes a button (19), and the button (19) is arranged outside the housing (16). The mobile power supply includes a rechargeable battery pack and a charging contact (20), the rechargeable battery pack is arranged inside the housing (16), and the charging contact (20) penetrates through the outside of the housing (16). The display module, the setting module, and the mobile power supply are respectively electrically connected to the information processing module (6), and the exhaust hole (17) penetrates through the housing (16) and is connected to the gas sensor (5) through a pipeline respectively.

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