A hazardous gas detection device for fire rescue sites

Abstract

The present invention relates to the technical field of gas detection, and provides a hazardous gas detection device for a fire rescue scene. By placing the device in the measured environment, the target gas enters the filter through the air inlet on the high-temperature resistant housing, and dust and impurities in the air are filtered out. Then, it 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 art such as insufficient types of detected gases, inaccurate categories, poor high-temperature resistance, 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 hazardous gas detection device for a fire rescue site. Background Art

[0002] Fire is one of the most harmful disasters in today's human society. Fires often cause large numbers of casualties and huge property losses. The factor that causes the greatest harm to people is the large amount of toxic and harmful smoke generated by the combustion at the fire site. According to statistics, the number of people who die from inhaling toxic smoke in fires accounts for about 75% of the total number of fire deaths. This shows that it is of great significance to detect toxic and harmful gases at the fire accident rescue site.

[0003] Research shows that 15 gases such as carbon monoxide, carbon dioxide, hydrogen cyanide, and hydrogen chloride in the smoke at the fire accident site are the most lethal toxic and harmful gases in building fire accidents. However, due to the lack of professional gas detection equipment for fire rescue and fire scene investigation, the composite gas detectors currently equipped by the fire rescue team cannot achieve the detection coverage of the above-mentioned toxic and harmful gases, and can only detect 4 to 6 of them. The detection spectrum is insufficient, and it cannot be applied to the clearly related fire rescue tactics. It cannot meet the operation safety and occupational safety protection of the rescue personnel and fire scene investigation personnel at the fire site.

[0004] Specifically, first, the current detection equipment has poor high-temperature resistance, and the detection components are extremely easy to fail in a high-temperature environment, resulting in the inability to measure and give early warnings. Second, 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 it is impossible to effectively detect the types of toxic gases. Third, the stability and sensitivity of the current gas detectors vary, and in the case of the failure of the detection unit, it is impossible to accurately issue a failure warning, resulting in too large measurement errors or even failures. Fourth, there is usually no backup measure when the detection unit fails, resulting in insufficient stability and reliability of the detection instrument. Summary of the Invention

[0005] In view of this, in order to solve the problems that traditional gas detectors cannot accurately measure the types of target gases and are prone to large measurement errors or failures, it is necessary to provide a gas detection device that can more accurately and effectively detect the types and concentrations of hazardous gases in a high-temperature environment and in the presence of multiple hazardous gases, and achieve hazard warnings and failure warnings, and improve the stability and reliability of the detection instrument.

[0006] To achieve the object of the invention, a hazardous gas detection device for a fire rescue site is provided, and the device includes:

[0007] A housing, an air inlet, a filter, at least two gas sensors, an information processing module, and an early warning module; the housing is made of a high-temperature resistant material, the air inlet is disposed through one side of the housing, the filter, the gas sensors, the information processing module, and the early warning module are disposed inside the housing, the air inlet end of the filter is connected to the air inlet, the gas sensors are connected to the air outlet end of the filter, the gas sensors are electrically connected to the information processing module, and the early warning module is electrically connected to the information processing module.

[0008] Further, the device further includes a pump suction module, a multi-way connector, and a pipeline; the multi-way connector includes at least three interfaces, the air inlet, the filter, the pump suction module, and the multi-way connector are sequentially connected through the pipeline, and the gas sensors are respectively connected to the multi-way connector through pipelines.

[0009] Further, the device further includes a plurality of test strip reactors and a plurality of chemical test strips, the test strip reactors are respectively connected to the multi-way connector through pipelines, the chemical test strips are disposed inside the test strip reactors, and the chemical test strips adopt at least two different types.

[0010] Further, the number of the test strip reactors is at least two; the device further includes at least two air valves, the air valves are respectively disposed 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 sensors and the test strip reactors for detecting whether the gas sensors and / or the chemical test strips fail, and the control unit is respectively electrically connected to the air valves for sending instructions to the air valves.

[0012] Further, the device further includes a liquid heat insulation layer; the liquid heat insulation layer is disposed on the inner wall of the housing and includes a heat insulation layer bag and a coolant, and the coolant is hermetically disposed in the heat insulation layer bag.

[0013] Further, the gas sensors include: an electrochemical sensor, a catalytic combustion sensor, and a photoionization sensor;

[0014] Or, an electrochemical sensor, a semiconductor sensor, and a photoionization sensor.

[0015] Further, the gas sensor is a combination of six gas sensors, and the combination of six gas sensors uses three electrochemical sensors, one infrared sensor, one catalytic combustion sensor, and one photoionization sensor; or, the combination of six gas sensors uses four electrochemical sensors, one catalytic combustion sensor, and one photoionization sensor, and the positions of the six gas sensors can be interchanged.

[0016] Further, the device further includes a wireless data transmission module, a positioning module, and an antenna. The wireless data transmission module, the positioning module, and the antenna are respectively electrically connected to the information processing module and are all arranged inside the housing. The wireless data transmission module is used to send transmission data to a remote terminal. The working frequency band of the wireless data transmission module is 410 - 510 MHz, and the positioning module is used to perform satellite positioning and / or inertial navigation positioning on the device.

[0017] Further, the warning module includes: a plurality of indicator lights, a buzzer, and a vibrator. The indicator lights, the buzzer, and the vibrator are respectively electrically connected to the information processing module;

[0018] The device further includes: a display module, a setting module, a mobile power supply, and an exhaust hole; the outer port of the air inlet is arranged on one side of the housing, and the internal space of the air inlet is connected to the external atmosphere. The display module includes a display screen, and the display screen is arranged outside the housing. The setting module includes buttons, and the buttons are arranged outside the housing. The mobile power supply includes a rechargeable battery pack and charging contacts. The rechargeable battery pack is arranged inside the housing, and the charging contacts penetrate through the outside of the housing. The display module, the setting module, and the mobile power supply are respectively electrically connected to the information processing module, and the exhaust hole penetrates through the housing and is connected to the gas sensor through a pipeline respectively.

[0019] The technical solution provided by the embodiment of the present invention at least brings the following beneficial technical effects:

[0020] The present invention provides a dangerous gas detection device for a fire rescue site. Compared with the related technology, it has stronger high-temperature resistance and can be more resistant to high temperatures in the presence of various dangerous gases. It can more accurately detect the types and concentrations of dangerous gases, and achieve dangerous warning and failure warning. At the same time, the stability and reliability of the detection device are improved. Description of the Drawings

[0021] Figure 1 It is a schematic internal structure diagram of a dangerous gas detection device for a fire rescue site provided by an embodiment of the present invention;

[0022] Figure 2It is a schematic structural diagram of another gas detection device including a pump suction module according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of another gas detection device including a test strip reactor according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of a combined test strip according to an embodiment of the present invention;

[0025] Figure 5 It is a schematic structural diagram of another gas detection device including a gas valve according to an embodiment of the present invention;

[0026] Figure 6 It is a schematic structural diagram of another gas detection device including a liquid heat insulation layer according to an embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of another gas detection device including a wireless data transmission module and a positioning module according to an embodiment of the present invention;

[0028] Figure 8 It is a schematic external structure diagram of a hazardous gas detection device for a fire rescue site according to an embodiment of the present invention;

[0029] Reference numerals:

[0030] Air inlet - 1, Filter - 2, Pump suction module - 3, Multi - way connector - 4, At least two gas sensors - 5, Information processing module - 6, Warning module - 7, Test strip reactor - 8, Chemical test strip - 9, Gas 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, Button - 19, Charging contact - 20. Detailed implementation manners

[0031] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Terms such as "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used 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 including 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 not clearly listed or inherent to these processes, methods, products or devices.

[0032] 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 efforts shall fall within the protection scope of the present invention.

[0033] Embodiment

[0034] An embodiment of the present invention provides a hazardous gas detection device for a fire rescue site, as Figure 1 shown, including:

[0035] A housing 16, an air inlet 1, a filter 2, at least two gas sensors 5, an information processing module 6, and an early warning module 7;

[0036] The housing 16 is made of a high-temperature resistant material. The air inlet 1 is disposed through one side of the housing 16. The filter 2, the gas sensors 5, the information processing module 6, and the early warning module 7 are disposed inside the housing 16. The air inlet end of the filter 2 is connected to the air inlet 1. The gas sensors 5 are connected to the air outlet end of the filter 2. The gas sensors 5 are electrically connected to the information processing module 6. The early warning module 7 is electrically connected to the information processing module 6.

[0037] It should be noted that, preferably, the housing 16 is made of a high-strength engineering plastic or a composite anti-slip rubber; the filter element of the filter 2 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 pump suction module 3, pipelines, multi-way connectors 4, and gas sensors 5, thereby causing inaccurate measurement or failure of the detection device; the pump suction module 3 uses an electric air pump, and the pipelines and multi-way connectors 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 sensors 5 include at least two different types of sensors, and include sensors that can respectively identify toxic gases and flammable gases, and can measure the concentrations of toxic gases and flammable gases; preferably, the gas sensors 5 further include sensors that can measure the oxygen concentration; preferably, the gas sensors 5 include a gas sensor 5 body and a sensor seat, and the sensor body is detachably installed on the sensor seat. The positions of the at least two gas sensors 5 can be freely set according to actual needs. The gas sensors are disposed in a sealed space, and the sealed space can be made of a plastic box-shaped object, for example, to prevent external gases that have not passed through the filter from entering the gas sensors, causing contamination and affecting the detection effect.

[0038] Optionally, the information processing module 6 includes a driving circuit board and a microprocessor, and the microprocessor is disposed on the driving circuit board; the microprocessor includes embedded software, and the embedded software is used to enable the microprocessor to read the input induction signal, calculate the result and send an instruction signal according to a predetermined software program.

[0039] Wherein, the warning module 7 includes a danger warning unit and a failure warning unit. The danger warning unit is used to give a warning of dangerous gas leakage, and the failure warning unit is used to give a warning when the detection device fails. Preferably, the danger warning unit includes a first-level warning unit and a second-level warning unit, and is used to set warnings with different danger levels according to the types and / or concentrations of different dangerous gases. Wherein, the danger warning unit may also include warning units above the second level, which is not limited here. Preferably, for the detection of toxic gases, the warning module sets two-level detection alarms based on the Immediately Dangerous to Life or Health (IDLH) value; for the detection of oxygen, two-level detection alarms are set on the oxygen-deficient side.

[0040] In the specific implementation process, the detection device is placed in the measured environment. The target gas automatically diffuses into the device 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 pump suction module 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 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 the 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 combustible 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 combustible gas.

[0041] It can be seen that in the embodiment of the present invention, compared with the related art, the high-temperature resistance ability is stronger. In the presence of multiple dangerous gases, it can more accurately identify combustible gases and toxic gases, and realize danger warning and failure warning, while improving the stability and reliability of the detection device.

[0042] In a preferred embodiment, it further includes a pump suction module (3), a multi-way connector (4), and a pipeline; the multi-way connector (4) includes at least three interfaces, and the air inlet (1), the filter (2), the pump suction module (3) and the multi-way connector (4) are sequentially connected through the pipeline, and the gas sensors (5) are respectively connected to the multi-way connector (4) through pipelines, asFigure 2 as shown

[0043] In an embodiment of the present invention, by providing a pump suction module and a multi-way connector, the speed at which the gas to be measured enters the inspection device can be increased, thereby improving the measurement efficiency, and having higher sensitivity in the case of low-concentration hazardous gases.

[0044] 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.

[0045] Specifically, since the combustion of substances requires oxygen, if there is oxygen leakage in the environment to be measured, the possibility of a fire will increase. If the air contains combustible gas at the same time, an explosion is extremely likely to occur. Therefore, it is very necessary to detect oxygen leakage at the fire scene.

[0046] In an 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 increased, and at the same time, the safety and reliability are improved.

[0047] 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 3 as shown

[0048] 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, fuchsin 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 fuchsin test paper is used to detect bleaching substances and their concentrations in the target gas, and the phenolphthalein test paper is mainly used to detect ammonia and its concentration in the target gas.

[0049] 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.

[0050] During the specific implementation process, the pump suction module 3 is started. The target gas passes through the air inlet 1, the filter 2, and the pump suction module 3, and then reaches each gas sensor 5 and each test strip 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 strip 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 the 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.

[0051] It can be seen that in the embodiment of the present invention, compared with the prior art, the hazardous gas detection device for the fire rescue site at least has the following technical effects: By using a plurality of test strip reactors 8 and a plurality of chemical test strips 9 to detect the target gas, it can achieve higher temperature resistance in the presence of multiple hazardous gases, and can more accurately detect the type and concentration of the hazardous gas. At the same time, the stability and reliability of the detection device are improved, and the user experience is enhanced.

[0052] In a preselected embodiment, the chemical test strip 9 uses a combined test strip 15, and the combined test strip 15 is synthesized by using at least two different types of chemical test strips 9, such as Figure 4 shown.

[0053] 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, and scan and read its color.

[0054] In the embodiment of the present invention, synthesizing a plurality of 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.

[0055] In a preferred embodiment, the number of the test strip reactors 8 is at least two; the device further includes at least two gas valves 10, and the gas valves 10 are respectively arranged on the pipelines between the test strip reactors 8 and the multi-way connector 4, and the gas valves 10 are respectively electrically connected to the information processing module 6, such as Figure 5 shown.

[0056] 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 has failed, 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.

[0057] 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.

[0058] 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 has failed. The control unit is respectively electrically connected to the air valve 10 and is used to send an instruction to the air valve 10.

[0059] In the specific implementation process, due to the fact that the chemical test strip 9 is a disposable device and the stability and corrosion resistance of the gas sensor 5 are insufficient, etc., 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 test strip 9, and at the same time, it is necessary to prompt the user to replace the new gas sensor 5. 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 has failed, 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. 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.

[0060] In the embodiment of the present invention, by using a combination of a failure detection unit and a control unit in the information processing module 6, the use safety, convenience and reliability of the detection device can be improved, and the user experience can be enhanced.

[0061] In a preferred embodiment, a liquid heat insulation layer 22 is further included; the liquid heat insulation layer 22 is disposed on the inner wall of the housing and includes a heat insulation layer 22 bag and a coolant, and the coolant is hermetically disposed in the heat insulation layer 22 bag, as Figure 6 shown.

[0062] Specifically, the heat insulation layer 22 bag can be made of a metal material to improve the heat conduction efficiency. Preferably, the liquid heat insulation layer 22 includes a coolant circulation device to accelerate the heat absorption efficiency.

[0063] In the embodiment of the present invention, by adding a liquid heat insulation layer, the high-temperature resistance of the detection device at high temperatures such as at a fire scene can be effectively prevented, and the internal devices can be prevented from reducing performance or failing due to high temperatures, thereby improving the reliability of the detection device.

[0064] In a preferred embodiment, the gas sensor 5 includes: an electrochemical sensor, a catalytic combustion sensor, and a photoionization sensor.

[0065] 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 for oxygen detection with high sensitivity.

[0066] The catalytic combustion sensor utilizes the thermal effect principle of catalytic combustion. A measuring bridge is formed by pairing a detection element and a compensation element. Under certain temperature conditions, a flammable gas undergoes flameless combustion on the surface of the carrier of the detection element and under the action of a catalyst, the temperature of the carrier rises, and the platinum wire resistance inside it also rises accordingly, thereby causing the balanced bridge to lose balance and output an electric signal proportional to the concentration of the flammable gas. By measuring the magnitude of 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 and has the advantages of good linearity of the output signal, reliable index, low price, and no cross-infection with other non-combustible gases.

[0067] The photoionization sensor, abbreviated as PID, is a highly sensitive and widely used gas detector based on photoionization technology. It can detect volatile organic compounds with 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 the safety of the staff.

[0068] Preferably, the gas sensor 5 employs three electrochemical sensors, one catalytic combustion sensor, and one 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 information on its concentration changes. The second electrochemical sensor is used to detect concentration changes of hydrogen fluoride, sulfur dioxide, chlorine, hydrogen halides such as hydrogen chloride, sulfides, and chlorides. The third electrochemical sensor is used to detect concentration changes of carbon monoxide, cyanides such as hydrogen cyanide, and nitrogen oxides. The catalytic combustion sensor is used to detect concentration changes of combustible gases such as methane, propane, and gasoline. The photoionization sensor 6 can detect concentration changes of organic volatile compounds in response.

[0069] In a preferred embodiment, the gas sensor 5 includes: an electrochemical sensor, a semiconductor sensor, and a photoionization sensor.

[0070] Preferably, the gas sensor 5 employs four electrochemical sensors, one semiconductor sensor, and one photoionization sensor. The semiconductor sensor is a gas sensor 5 that uses a semiconductor gas-sensitive element as a sensitive element, and is widely used in the detection of flammable gas leaks in homes and factories, and is suitable for the detection of flammable gases such as methane, liquefied gas, hydrogen, and gasoline.

[0071] In the embodiments of the present invention, by using a combination of multiple gas sensors 5, it is possible to more accurately detect the types of dangerous gases in the presence of multiple dangerous gases, increase the coverage range of the detected types of dangerous gases, and improve the broad-spectrum nature of gas detection.

[0072] In a preferred embodiment, the gas sensor 5 uses a combination of six gas sensors. The combination of the six gas sensors employs three electrochemical sensors, one infrared sensor, one catalytic combustion sensor, and one photoionization sensor.

[0073] In an embodiment of the present invention, the electrochemical sensor 5 includes first, second, and third electrochemical sensors. The first electrochemical sensor is used to detect information on changes in the oxygen concentration at the fire accident scene. The second electrochemical sensor is used to detect information on changes in 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 information on changes in 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 information on changes in the concentration of carbon dioxide generated by combustion at the fire accident scene. The catalytic combustion sensor is used to detect information on changes in 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 information on changes in 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.

[0074] Preferably, the gas sensor 5 is a combination of six gas sensors. The combination of the six gas sensors is a combination of four electrochemical sensors, one catalytic combustion sensor, and one photoionization sensor. The positions of the six gas sensors can be interchanged.

[0075] In an embodiment of the present invention, by combining six different types of sensors, the detection of different types and properties of gases is realized, improving the broad-spectrum and reliability of the detection device.

[0076] In a preferred embodiment, the detection device further includes a wireless data transmission module 11, a positioning module 12, and an antenna. The wireless data transmission module 11, the positioning module 12, and the antenna are respectively electrically connected to the information processing module 6 and are all disposed inside the housing 16. The wireless data transmission module 11 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. The positioning module 12 is used to perform satellite positioning and / or inertial navigation positioning on the device, as Figure 7 shown.

[0077] Among them, the satellite positioning adopts a positioning method of GPS and / or Beidou satellite positioning.

[0078] In an embodiment of the present invention, by adopting the wireless data transmission module 11 and a dedicated operating frequency band, it is convenient to realize remote sharing and management of data and real-time remote monitoring of the target area, reducing the danger of personnel operation, reducing transmission interference, and improving the user experience.

[0079] In a preferred embodiment, specifically, the positioning module 12 adopts a positioning method of GPS / Beidou satellite positioning and includes an antenna device for sending and receiving positioning data.

[0080] In the embodiment of the present invention, by adopting the method of satellite positioning with the positioning module 12, it is beneficial for the user to confirm the location in real time, facilitate the identification and remote positioning of dangerous areas, and improve the user experience.

[0081] In a preferred embodiment, the warning module 7 includes: a plurality of indicator lights 13, a buzzer 14, and a vibrator. The indicator lights 13, the buzzer 14, and the vibrator are respectively electrically connected to the information processing module 6;

[0082] The detection device further includes a housing 16, a display module, a setting module, a mobile power supply, and an exhaust hole 17; 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 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.

[0083] Figure 8 It is a schematic diagram of the external structure of a dangerous gas detection device provided by the embodiment of the present invention for a fire rescue site, as Figure 8 shown.

[0084] 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 on; when flammable gas is detected, the flammable gas indicator light is on; when toxic gas is detected, the toxic gas indicator light is on. When one or more gas sensors 5 send a fault, the failure indicator light is on; the warning level indicator light includes a first-level warning indicator light and a second-level warning indicator light. When the preset gas type is detected or the preset concentration is reached, the corresponding warning level indicator light is on.

[0085] 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 beeping sounds according to the detected toxic gas and flammable gas, and emits sounds with different decibel levels according to different warning levels.

[0086] Among them, the warning module 7 is arranged by setting an indicator light, a buzzer 14, and a vibrator, which is convenient for users to use in an environment with dim light or where visual inspection is impossible, improving safety and user experience.

[0087] It should be noted that devices such as the filter 2, the pump suction module 3, the multi-way connector 4, at least two gas sensors 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 to support and protect 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 working mode, gas sensor 5 options, test paper reactor 8 options, timed power on / off, information remote transmission options, satellite positioning options, 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.

[0088] 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 "Caution", prompting 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 "Avoid", prompting the user to retreat and take shelter.

[0089] In the embodiment of the present invention, the warning module is set by combining the indicator light 13, the buzzer 14, and the vibrator, and the detection device is set with the display module, the setting module, the mobile power supply, and the exhaust hole 17, so that the detection device can work more stably, improving the stability, operability, use convenience, and user experience of the gas detection device.

[0090] It can be seen that in the embodiment of the present invention, compared with the prior art, the hazardous gas detection device for the fire rescue site at least has the following technical effects: it can be more resistant to high temperatures in the presence of multiple hazardous gases, can more accurately detect the types and concentrations of hazardous gases, and achieve hazard warning and failure warning, while improving the stability and reliability of the detection device.

[0091] 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 hazardous gas detection device for a fire rescue scene, characterized in that, it includes: a housing (16), an air inlet (1), a filter (2), a pump suction module (3), a multi-way connector (4), a pipeline, at least two gas sensors (5), an information processing module (6), an early warning module (7), at least two test paper reactors (8), at least two chemical test papers (9), at least two gas valves (10), a liquid heat insulation layer (22); The housing (16) is made of high-temperature resistant material. The air inlet (1) is disposed through one side of the housing (16). The filter (2), the gas sensor (5), the information processing module (6), and the early warning module (7) are disposed inside the housing (16). The air inlet end of the filter (2) is connected to the air inlet (1). The gas sensor (5) is connected to the air outlet end of the filter (2). The gas sensor (5) is electrically connected to the information processing module (6). The early warning module (7) is electrically connected to the information processing module (6); The multi-way connector (4) includes at least three interfaces. The air inlet (1), the filter (2), the pump suction module (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 test paper reactors (8) are respectively connected to the multi-way connector (4) through pipelines. The chemical test papers (9) are disposed inside the test paper reactors (8). The chemical test papers (9) adopt at least two different types; The information processing module (6) includes a failure detection unit and a control unit. The failure detection unit is electrically connected to the gas sensor (5) and the test paper reactor (8) respectively, and is used to detect whether the gas sensor (5) and the chemical test paper (9) fail. The control unit is electrically connected to the gas valve (10) respectively, and is used to send instructions to the gas valve (10); The gas valves (10) are respectively disposed on the pipelines between the test paper reactors (8) and the multi-way connector (4). The gas valves (10) are normally closed, and 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 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. The gas valves (10) are respectively electrically connected to the information processing module (6); The liquid heat insulation layer (22) is disposed on the inner wall of the housing (16), and includes a heat insulation layer bag and a coolant. The coolant is hermetically disposed in the heat insulation layer bag.

2. The hazardous gas detection device for a fire rescue scene according to claim 1, characterized in that, the gas sensor (5) includes: an electrochemical sensor, a catalytic combustion sensor, and a photoionization sensor; Or, an electrochemical sensor, a semiconductor sensor, a photoionization sensor.

3. A hazardous gas detection device for a fire rescue scene according to claim 1, characterized in that the gas sensor (5) is a combination of six gas sensors, and the six - gas - sensor combination consists of three electrochemical sensors, one infrared sensor, one catalytic combustion sensor, and one photoionization sensor; Or, the six - gas - sensor combination is a combination of four electrochemical sensors, one catalytic combustion sensor, and one photoionization sensor, and the positions of the six gas sensors are interchangeable.

4. A hazardous gas detection device for a fire rescue scene according to claim 1, characterized in that it further includes a wireless data transmission module (11), a positioning module (12), and an antenna. The wireless data transmission module (11), the positioning module (12), and the antenna are respectively electrically connected to the information processing module (6) and are all arranged inside the housing (16). The wireless data transmission module (11) 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, and the positioning module (12) is used to perform satellite positioning and / or inertial navigation positioning on the device.

5. A hazardous gas detection device for a fire rescue scene according to claim 1, characterized in that the warning module (7) includes: a plurality of indicator lights (13), a buzzer (14), and a vibrator. The indicator lights (13), the buzzer (14), and the vibrator are respectively electrically connected to the information processing module (6); the device further includes: a display module, a setting module, a mobile power supply, and an exhaust hole (17); 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 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.

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