38 results about "Gaseous detection device" patented technology

This invention discloses a gas detection device for the excavation chamber of a tunnel boring machine (TBM), relating to the field of gas detection technology for TBM excavation chambers. It includes a TBM body and an excavation chamber partition. A gas detection mechanism is fixedly connected to the partition. This gas detection device draws in gas through a suction system via a first flexible hose, a first connecting pipe, a transmission box, a transmission pipe, and an intake pipe. A filter screen in the intake frame first filters dust. The transmission mechanism drives the transmission pipe and the intake frame to rotate, achieving a wide-range suction and expanding the detection range. The filtered gas enters the gas detector for real-time detection, reducing detection delay and saving time for safe operation, thus improving production safety. Furthermore, the drive mechanism rotates the mounting box 90° periodically, alternating the intake air intake and further ensuring comprehensive detection. Simultaneously, the filter screen filters dust, reducing its impact on the gas detector and improving detection stability.

The application provides a wharf pipe trench gas detection device, and relates to the technical field of gas detection, which comprises a gas detector and a gas collection assembly. The gas collection assembly comprises a gas collection box. A collection gas pump is installed on the left side of the inner cavity of the gas collection box. The output end of the collection gas pump is connected with the gas detector through a gas conveying pipe. A gas suction pipe is installed on the gas suction hole of the collection gas pump. The tail end of the gas suction pipe is connected with a gas collection pipe through a rotary joint. A winding assembly is installed on the inner side of the middle part of the gas collection box. The winding assembly comprises a support frame. A winding wheel is movably installed on the inner side of the middle part of the support frame. The gas collection pipe is wound or unwound by the winding assembly. The inlet end of the gas collection pipe can be lowered to the bottom of the pipe trench and close to the water surface. Therefore, the gas detector can directly collect and detect the gas close to the water surface at the bottom of the pipe trench. The accuracy of the detection work of the pipe trench gas is effectively improved.

The application discloses a switchable gas detection device and method for a gas-liquid two-phase flow pipeline, which comprises a main pipeline, a container, a first baffle plate, a first bypass pipeline, a second bypass pipeline, a first valve, a second valve, a flowmeter and a water supplement valve. The container is divided into a first cavity and a second cavity by the first baffle plate, and a gap is left between the first baffle plate and the inner bottom wall of the container. The main pipeline is connected with the first cavity through the first bypass pipeline, and the second cavity is connected with the main pipeline through the second bypass pipeline. The first valve is arranged on the first bypass pipeline, the second valve and the flowmeter are arranged on the second bypass pipeline, and the water supplement valve is arranged on the top of the container and connected with the container. The application realizes the natural separation of gas and fluid based on the density difference between gas and liquid, does not need to additionally configure a separation device, has the advantages of simple structure and low cost, can analyze the composition of the separated gas, and can directly record the volume of the gas and the volume of the fluid in unit time after separation. The volume of the gas is divided by the volume of the fluid, so that the proportion of the gas can be calculated.

The application discloses a kind of confined space operation safety real-time monitoring and intelligent management system, comprising: confined space entrance integrated box, confined space field operation integrated box, intelligent safety helmet and safety control center, touch screen industrial computer is integrated in confined space entrance integrated box, first camera, first sound-light alarm and first microphone;Confined space field operation integrated box is integrated with second camera, gas detection device, one-key alarm device and second sound-light alarm;Intelligent safety helmet is fixedly provided with third camera;Safety control center is used for centralized monitoring, intelligent early warning, process management, equipment control, data traceability and AI violation identification to confined space operation.The confined space operation safety real-time monitoring and intelligent management system provided in the application eliminates monitoring blind area, realizes the automatic linkage of alarm and voice communication, and supports on-site rapid deployment and relocation.

The utility model discloses installation mechanism and gas detection device, installation mechanism is applicable to gas probe, and installation mechanism includes: seat body, seat body is used for fixing on external spare part, bearing piece, bearing piece is fixed in seat body height direction one side, and bearing piece is the hollow structure of two ends opening, extension piece, extension piece passes through bearing piece and can be limited on bearing piece, and extension piece is telescopic structure, installation piece, installation piece is fixed in extension piece and is away from bearing piece one end, and installation piece is used for installing gas probe, detection pipeline and gas detection interface, one end of detection pipeline is used for connecting with the gas outlet of gas probe, and the other end of detection pipeline is connected with gas detection interface. The utility model has realized the safe and reliable maintenance mode to the gas probe outside the bank, has effectively avoided the safety risk of maintenance personnel because of climbing, has improved work efficiency. And, detection pipeline and gas detection interface provide convenient passage for detecting gas, and it is convenient for maintenance test operation.

The application provides a gas detection device which can improve the accuracy of gas detection. The gas detection device comprises a first detection unit, the first detection unit comprises a first shell and a first detection element, the first shell has a shell inner cavity, and the first detection element is located in the shell inner cavity; a wall portion of the first shell is provided with a first through hole penetrating through the wall portion; the first detection unit further comprises a blocking portion, the blocking portion is connected with the wall portion of the first shell, the blocking portion and the first through hole have a spacing in the depth direction of the first through hole; at least part of the projection of the blocking portion covers the first through hole or the orthographic projection of the first detection element in the depth direction of the first through hole.

A gas detection device includes a housing and a detection unit, the housing has a first side wall, the first side wall has a ventilation part, the ventilation part has a through hole, the through hole penetrates through the first side wall, the through hole is communicated with the outside of the gas detection device; the housing has an inner cavity, the housing has a blocking part, the blocking part is connected with the first side wall, the blocking part divides the inner cavity into a first cavity and a second cavity, the ventilation part is located at the periphery of the first cavity; the detection unit has a gas chamber, the detection unit has a second side wall, the second side wall is located at the periphery of the gas chamber, the second side wall has a hole part, the hole part has a matching hole, the matching hole penetrates through the second side wall, the hole part is located in the first cavity, the matching hole is communicated with the gas chamber, and the matching hole is communicated with the through hole. The application is beneficial to improve the gas detection time response of the gas detection device.

The application provides a dual-purpose gas path structure for a portable gas detector, which belongs to the technical field of gas detection devices and comprises a cylindrical outer shell, a top coaxial air pump, an air flow pipeline, a bottom air chamber cover, a sliding exhaust air inlet cover, a sensor and a waterproof filter film; a plurality of air chambers are uniformly distributed in the circumferential direction of the air chamber cover and are connected through air flow guide grooves; a reset spring is arranged between the exhaust air inlet cover and the air chamber cover, and a resistance cover is connected through a sliding rod. When the air pump is started, air flow presses down the resistance cover to overcome the elastic force of the reset spring, so that the exhaust air inlet cover moves downward to close the diffusion gap and open the pump suction air path; when the air pump is turned off, the reset spring is reset, and the diffusion air inlet mode is automatically switched. The application can realize pump suction and diffusion dual-mode automatic switching without using a solenoid valve, has the advantages of double gas path detection switching, improves detection precision and equipment reliability, and is suitable for various portable multi-gas detection instruments.

Gas detection device (1) for detecting at least one target gas in at least one gas mixture, wherein the gas detection device (1) comprises a radiation source (50) configured to emit electromagnetic radiation, a first measuring chamber (6) and a second measuring chamber (6'), as well as a first measuring detector (7) and a second measuring detector (7'), wherein the second measuring chamber (6') is spatially separated from the first measuring chamber (6), wherein the gas detection device (1) is configured such that a first gas mixture flows through the first measuring chamber (6) and a second gas mixture flows through the second measuring chamber (6'), wherein the gas detection device (1) is configured such that electromagnetic radiation emitted by the radiation source (50) first penetrates the first measuring chamber (6) and then the second measuring chamber (6'), wherein the first measuring detector (7) is configured toto measure a measure of a physical effect in the first measuring chamber (6), wherein this physical effect is caused by electromagnetic radiation penetrating the first measuring chamber (6) and correlates with the presence of target gas in the first measuring chamber (6), and to generate a first signal correlated with the physical effect in the first measuring chamber (6), and wherein the second measuring detector (7') is configured to measure a measure of a physical effect in the second measuring chamber (6'), wherein this physical effect is caused by electromagnetic radiation penetrating the second measuring chamber (6') and correlates with the presence of target gas in the second measuring chamber (6'), and to generate a second signal correlated with the physical effect in the second measuring chamber (6'), characterized in that the gas detection device (1) comprises a reflector (76) for electromagnetic radiation,wherein the radiation source (50) and the reflector (76) are arranged such that the electromagnetic radiation emitted by the radiation source (50) first passes through both measuring chambers (6, 6'), is reflected by the reflector (76) and passes through both measuring chambers (6, 6') a second time.

This application relates to the field of detection technology, and in particular to a gas detection device with high detection accuracy. A gas driving mechanism is provided inside the housing of the detection unit of the gas detection device. The cantilever of the gas driving mechanism can vibrate to accelerate the airflow, allowing the airflow to enter the housing as quickly as possible so that the detection unit can perform timely detection. Alternatively, a gas driving mechanism is provided inside the outer casing of the gas detection device, and the cantilever of the gas driving mechanism can vibrate to accelerate the airflow, allowing the airflow to enter the outer casing as quickly as possible and diffuse more rapidly into the housing of the detection unit, thereby improving detection accuracy.

The application relates to the technical field of hydrogen energy equipment safety, and discloses a hydrogen storage container leakage detection device.The device comprises a sealed shell assembly, a gas detection device, an alarm and a position detection assembly.The sealed shell assembly is composed of a first bottle body sealing plate and a second bottle body sealing plate, is internally provided with a high-pressure hydrogen storage cylinder, and is separated into a top groove and a bottom groove by a sealing limiting ring.The gas detection device actively samples and detects the gas in the sealed shell through a gas suction pump and a hydrogen sensor, and triggers the alarm.The position detection assembly comprises a palladium oxide test paper attached to the inner wall of the shell and a water spraying assembly.When leakage is detected, the water spraying assembly sprays water to activate the color development reaction of the palladium oxide test paper to accurately locate the leakage point, and cooling and explosion prevention are simultaneously achieved.The application solves the problems of inaccurate leakage point positioning, low detection efficiency and lack of active safety measures in the prior art.

The present application relates to the technical field of gas detection, in particular to an intelligent cabinet detection device, which comprises a cabinet structure, a cell for storing packages formed through the cabinet structure, and a multi-path gas detection device, wherein the multi-path gas detection device is composed of a position selection valve and a detection box, and the detection box can actively extract gas and detect volatile gas of drugs or flammable and explosive substances; the intelligent cabinet detection device can actively extract volatile gas of packages in the cell, and can continuously and without missing for 24 hours, quickly and accurately identify drugs and flammable and explosive substances, and is applied to places such as express delivery cabinets, thereby effectively improving public safety.

This utility model discloses an energy-saving zeolite rotor device for treating organic waste gas from coating processes. It relates to the technical field of zeolite rotor device structures and aims to solve the problem that existing zeolite rotor devices do not have good energy-saving effects during operation, leading to resource waste. The key technical points include a zeolite rotor box, with a gas detection device installed on one side of the inner wall of the zeolite rotor box. Maintenance doors are installed on both sides of the outer wall of the zeolite rotor box. A desorption outlet seat is provided on the other side of the upper end of the zeolite rotor box. An installation chamber one is provided inside the zeolite rotor box, with installation chamber two at each end of the first installation chamber. A support frame is installed inside the second installation chamber. A zeolite device is installed inside the first installation chamber, and a zeolite mounting frame is installed outside the zeolite device. A limiting and fixing frame is installed above the zeolite mounting frame.

This invention belongs to the technical field of medical devices and discloses a peritoneal gas detection device based on low-concentration sensing and a unidirectional microfluidic channel, solving the technical problem of low detection accuracy in existing peritoneal free gas detection devices. The device includes a separation component, one end of which is connected to the drainage tube of a postoperative patient for gas-liquid separation of the drainage material; a unidirectional flow channel module, one end of which is connected to the separation component for unidirectional transmission of the separated gas, the unidirectional flow channel module having asymmetric flow resistance characteristics; and a detection module, disposed on the unidirectional flow channel module, for detecting characteristic gas components and their corresponding concentrations in the gas. Therefore, by using the unidirectional flow channel module with its asymmetric flow channel, and utilizing fluid dynamics characteristics, the flow resistance is extremely low during forward flow and increases sharply in the reverse direction due to eddy currents. This effectively blocks the backflow of external air and drainage bag exhaust gas without additional mechanical power, avoiding sample dilution and contamination, thereby improving detection accuracy.

This application relates to a gas detection device for semiconductor process manufacturing, comprising: a sample collector, a pre-concentration unit, a column oven, and a detector. The sample collector includes a gas collection chamber and a sample input channel, a sample output channel, and a gas purging channel connected to the gas collection chamber. Process gas is input into the gas collection chamber through the sample input channel. The pre-concentration unit is connected to the gas collection chamber through the sample output channel and performs adsorption and desorption treatment on the process gas from the gas collection chamber. A gas chromatography column is installed in the column oven, which is connected to the pre-concentration unit through a first gas transmission channel. The gas chromatography column separates the desorbed process gas. The detector is connected to the column oven through a second gas transmission channel and performs gas composition analysis on the separated process gas. This application enables online detection of process gases in the process chamber used in semiconductor process manufacturing, improving detection efficiency and flexibility.

The present application provides an oxygen detection system for a reflow furnace. The oxygen detection system includes a first gas receiving device, a second gas receiving device, an oxygen detection device, and a chamber switching device. The gas in each furnace chamber of the first group of furnace chambers is switchable into the first chamber of the first gas receiving device. The gas in each furnace chamber of the second group of furnace chambers is switchable into the second chamber of the second gas receiving device. The chamber switching device is switchably in fluid communication with one of the first chamber and the second chamber, while the gas suction device is in fluid communication with the other of the first chamber and the second chamber.

Mobile system (100) for gas leak detection, comprising: - a motorized vehicle (1) with a plurality of wheels, equipped with an intake circuit (2) for taking at least one air sample from outside the motorized vehicle (1), - a gas detection device (3) attached to the motorized vehicle (1), the system (100) being characterized in that the gas detection device (3) comprises: - a sensor-based analysis unit (4) operatively connected to the intake circuit (2) and designed to receive at least one air sample from the intake circuit (2) at the inlet and to record concentration values ​​at various time intervals that are characteristic of a concentration of at least one predetermined gas in the incoming air sample;- a unit (5) for detecting the position of the motorized vehicle (1), designed to acquire information at different time intervals to determine the position occupied by the motorized vehicle (1); - a control unit (6) operatively connected to the sensor-based analysis unit (4) and the detection unit (5), and designed to assign each acquired concentration value to the acquired information for determining the position occupied by the motorized vehicle (1) with reference to the same time intervals, and to determine geolocated gas concentration information, which includes the acquired concentration values ​​in relation to the acquired positions occupied by the motorized vehicle (1).

Provided is a gas detection apparatus with which good optical properties are obtained. A gas detection apparatus (1) includes a substrate (2), a light-emitting section (3), a light-receiving section (4), a light-guiding section (5), and a fixing section that fixes the light-guiding section (5) and the substrate (2). The light-guiding section (5) includes at least two leg sections (54), the substrate (2) includes at least two position reference sections (63) that are in contact with the leg sections (54), a position of the light-guiding section (5) in a perpendicular direction relative to the substrate (2) is set by the position reference sections (63), and the fixing section is a structure that is independent of the position reference sections (63) and the leg sections (54).

The application relates to a gas detection device and method. The gas detection device comprises a first sensor for intermittently detecting organic volatile gas based on photoionization technology to collect first gas data, and a second sensor for continuously detecting organic volatile gas based on semiconductor technology to collect second gas data. The first sensor and the second sensor are fused, and the use frequency of the first sensor is reduced by intermittently operating the first sensor, thereby prolonging the service life of the first sensor. A processing module for processing data can construct a calibration model based on at least the first gas data and the second gas data collected at the same time point, and calibrate the second gas data collected by the second sensor in real time based on the calibration model, so as to obtain the detection result of the gas detection device on the organic volatile gas.

This utility model discloses a gas guiding device for gas detection in grain silos, comprising mounting brackets, gas conduits, and a gas tube box. Multiple mounting brackets are spaced apart and inserted into the grain surface within the silo. The number of gas conduits corresponds to the number of mounting brackets, with their inlets fixed to each bracket. The gas tube box is located at the bottom of the outer wall of the grain silo, and the outlets of all gas conduits extend into the gas tube box. This utility model, by arranging multiple gas conduits inside the grain silo and extending them outside, allows for direct connection of a traditional handheld suction gas detection device to the gas conduits for gas extraction and detection at various points within the silo. This enables the detection and assessment of the overall gas conditions within the silo, ensuring the safety of personnel entering the silo. Compared to methods that deploy sensors inside the silo, this utility model has lower installation and operating costs, a longer equipment lifespan, and is more convenient to install and maintain.

The utility model discloses a convenient installation structure and light hydrocarbon gas detection device, and convenient installation structure includes: installation base body, connecting structure and elastic locking structure, installation base body is configured in connecting medium container, and is provided with at least one connecting groove, connecting structure includes connecting piece and at least one insert, the connecting piece is used for connecting detection element, at least one the insert is connected with connecting piece, and with connecting groove opposite setting, can insert in connecting groove and pass through rotation or transverse displacement and realize the locking connection, elastic locking structure is connected with connecting piece, can be compressed when insert and connecting groove locking connection, to produce the reverse force of preventing insert and take out, and the device has realized light hydrocarbon gas detection device's quick, simple and easy and firmly install, has improved installation efficiency, has reduced installation cost.

The disclosure discloses a gas detection device and a gas detector thereof, which comprises: a light source for emitting composite light; a light splitting piece for splitting the composite light beam emitted by the light source into a first light beam and a second light beam; a containing piece comprising a detection cavity for containing a gas to be detected and receiving the first light beam and the second light beam, and the inner wall of the containing piece is provided with a reflecting part for reflecting the first light beam and the second light beam in the detection cavity, and the light path shape of the first light beam and the second light beam in the detection cavity is symmetrical; and a detection piece comprising a first channel and a second channel, wherein the first light beam and the second light beam enter the first channel and the second channel respectively for detection after being reflected. According to the scheme, the detection light paths of the first and second light beams used for detection are equal by setting the light splitting piece and the containing piece with the reflecting part, and the detection error is reduced.

The present application relates to deep-sea exploration technology, and discloses a headspace generator and an in-situ dissolved gas detection device, which innovatively uses a deep-sea hydrostatic pressure gradient as a power source, converts environmental potential energy into hydraulic energy through a hydrostatic pressure gradient driver, specifically, uses a through-hull piston and an oil pressure accumulator to convert external water pressure into oil pressure, drives a hydraulic cylinder, and then drives the first piston of a positive displacement pump to move, expands the variable volume chamber to build a vacuum environment. The present application switches three working conditions of the sampling unit: collecting seawater, vacuumizing the first chamber, and connecting the first chamber and the second chamber, uses pressure difference to make the water sample pressure drop suddenly, realizes in-situ flash evaporation and detection of dissolved gas; the present application does not need high-power electricity, and can forcibly pull apart the vacuum chamber in deep sea in-situ by using potential energy in the process of submerging and floating, and efficiently completes gas extraction.

The application provides a thermal conductivity type gas detection device which can improve detection accuracy and comprises a shell, a first detection part, the shell comprises a first shell, the first detection part comprises a first detection element, the first shell comprises a first shell inner cavity and a first through hole, the first shell comprises a circumferential wall corresponding to the first shell inner cavity and a base, the circumferential wall comprises an inner circumferential wall, and the second end of the first through hole is close to the first detection element; a first plane is defined, the first plane is perpendicular to the second direction, the first plane passes through the second end, the flow area of the first shell inner cavity in the first plane is S1, a corresponding inner circumferential wall between two end portions of the first detection element along a first direction is defined as a first inner circumferential wall portion, a plane perpendicular to the first direction is defined as a projection plane, the maximum area surrounded by the orthogonal projection of the first inner circumferential wall portion in the projection plane is S2, and S2 is less than S1.

This disclosure belongs to the field of on-chip integrated sensing technology, and provides a chip sensing component and a trace gas detection device. The chip sensing component includes: a first mode field coupler, a power beam splitter, a non-uniform free spectral range microring resonator array, a power combiner, and a second mode field coupler connected in series. The non-uniform free spectral range microring resonator array is composed of N microring resonators with different resonant ring lengths connected in parallel, and the evanescent field of the ring waveguide of each microring resonator is exposed to the chip surface environment. It is used to capture the absorption information of gas molecules using multiple evanescent fields, and outputs N probe beams carrying the absorption information of gas molecules to the power combiner. By using multiple microring resonators with different ring lengths, the spectral sampling interval is effectively greatly compressed, breaking through the limitation of the free spectral range of a single microring, enabling the on-chip system to detect the narrow linewidth absorption characteristics of gas molecules.

This invention provides a dual-purpose gas path structure for portable gas detectors, applicable to the field of gas detection device technology. It includes a cylindrical outer shell, a top coaxial air pump, an airflow pipe, a bottom gas chamber cover, a sliding exhaust / intake cover, a sensor, and a waterproof filter membrane. Multiple gas chambers are evenly distributed around the circumference of the gas chamber cover and connected by airflow guide channels. A return spring is provided between the exhaust / intake cover and the gas chamber cover, and a resistance cover is connected via a sliding rod. When the air pump starts, the airflow presses down on the resistance cover, overcoming the spring force of the return spring, causing the exhaust / intake cover to move down, closing the diffusion gap and opening the pump intake path. When the air pump stops, the return spring resets, automatically switching to diffusion intake mode. This invention achieves automatic switching between pump intake and diffusion modes without the need for a solenoid valve, offering the advantage of dual gas path detection switching, improving detection accuracy and equipment reliability, and is suitable for various portable multi-gas detection instruments.

The utility model provides a diaphragm valve high-pressure test system, which belongs to the field of valve testing and comprises a test gas source providing gas source communicated through a pipeline; the pressure regulating valve is used for regulating the gas pressure in the test gas source to the required test pressure and outputting test gas; the first electromagnetic valve controls the test gas, the controlled test gas flows through the tested diaphragm valve through the pipeline and then is fed back to the control system through the gas detection device, and the test pressure in the current test pipeline is displayed; when the pressure in the test pipeline reaches a preset working pressure value, the first electromagnetic valve starts a preset periodic action; the second electromagnetic valve is arranged on two pipelines at the rear end of the tested diaphragm valve and is used for discharging test gas in the test pipelines after the test is finished; the unloading valve is arranged between the first electromagnetic valve and the second electromagnetic valve and used for discharging pressure between pipelines of the pressure regulating valve and the first electromagnetic valve. By means of the treatment scheme, emission of high-pressure gas in the testing process is reduced, and the testing cost is saved.

The application discloses a high-risk industry safety monitoring system and an operating method thereof, and belongs to the technical field of safety monitoring. The system comprises a safety helmet video monitoring and GPS positioning device with an anti-explosion function, which integrates video acquisition, dual-mode positioning, vital sign monitoring, broadcast intercom and emergency alarm functions; an anti-explosion gas detection device; an anti-explosion wireless communication module; and a background big data operation and maintenance system. The application realizes a personnel-environment-behavior-vital sign integrated full-dimension monitoring architecture, actively warns through AI identification and an intelligent electronic fence, and can automatically match emergency plans, dispatch rescue resources, link on-site sound and light alarms and broadcast evacuation when alarming, solves the problems of poor cross-industry adaptability, fragmented functions, lagging emergency disposal, easy broken communication in complex environments and lack of personnel vital sign monitoring of the existing system, and improves the intelligent and refined level of safety management in high-risk industries.

A system for detecting and cleaning indoor air pollution adapted to be utilized in an indoor space with an HVAC system includes one or more outdoor gas detection devices, a plurality of channels, a plurality of indoor gas detection devices, a plurality of physical-typed or chemical-typed filtering devices, and a control central processor. The blower of the filtering device receives a control command so as to be driven and to generate an air convection which is directed. Therefore, the air pollution is filtered by the filtering component to allow the indoor air pollution data to approach to almost zero, so that a gas in the indoor space is cleaned to a safe and breathable state.