30 results about "Infrared gas analyzer" patented technology

The invention discloses a multi-head gas analysis device, and relates to the technical field of infrared gas analyzers, the multi-head gas analysis device comprises a sampling joint body, and the sampling joint body comprises a sampling tube, a threaded port, a double-head connecting tube, an upper steel ball and an upper spring. In the using process, through the structural arrangement that the multiple sets of sampling connector bodies are arranged on the side end edge of the infrared gas analyzer side by side, the sampling requirements of the multiple sets of sampling tank bodies can be met, and the number of to-be-detected samples and the detection efficiency are effectively improved; the establishment of a gas passage from the sampling tank body to the sampling pipe is controlled through gas pressure, so that the to-be-detected gas samples in the sampling tank body at multiple positions can be sequentially detected, and the gas samples in the sampling cavity can be uniformly and thoroughly discharged into the infrared gas analyzer to be detected; and the to-be-detected gas sample in the sampling cavity is isolated from the introduced high-pressure gas by the piston plate, so that the detection precision of the to-be-detected gas sample can be guaranteed.

The invention provides a gaseous pollutant Fourier transform infrared spectroscopic analysis method based on deep learning. The gaseous pollutant Fourier transform infrared spectroscopic analysis method comprises the following steps: acquiring infrared absorbance spectrums of different gases to be detected by utilizing a Fourier transform infrared gas analyzer; the method comprises the following steps of: preprocessing the collected spectral data, namely carrying out segmented denoising on the original spectral data by adopting a self-adaptive Savitzky-Golay filter, and carrying out normalization processing to balance a data range; carrying out feature extraction on the preprocessed spectral data by utilizing a one-dimensional convolution deep learning model so as to adapt to one-dimensional FTIR spectral features and realize feature extraction of multiple components of gas; mapping the extracted features to a prediction result of the to-be-detected component by applying a full connection layer of the model; and training and optimizing the model by adopting an MSE regression loss function. According to the invention, the processing capability of the gaseous pollutant spectral signal can be effectively improved, and high-precision multi-component quantitative analysis is realized.

The invention belongs to the technical field of gas concentration detection, and particularly relates to a rotary kiln infrared gas analyzer which comprises a shell assembly, a heat dissipation device is installed on the shell assembly, a gas suction device is installed at one end of the shell assembly, a filtering device is fixedly connected to the gas suction device, and a supporting plate is fixedly installed in the shell assembly. A detection gas chamber, a reference gas chamber and a correction gas chamber which are arranged in parallel are fixedly arranged on the supporting plate in a penetrating manner, and structures such as a processor, a controller, a temperature sensor, a gas pressure sensor, an electric heating wire and the correction gas chamber are arranged; the air temperature in the correction air chamber is heated to be the same as the air temperature in the detection air chamber through the electric heating wire, the air pressure in the detection air chamber is adjusted to be the same as the air pressure in the heated correction air chamber through the cooperation of the air pump and the exhaust valve, and then the detection result is calculated in equal proportion. The concentration of the target gas in the flue of the rotary kiln in the normal temperature state can be obtained, and the accuracy of a detection result is greatly improved.

The present invention belongs to the technical field of analytical detection, and particularly relates to an automatic zero-calibration Fourier transform infrared gas analyzer and its analysis method. The gas analyzer includes a sample gas analysis flow path composed of a sample gas sampling head, a bag filter, a three-pass filter, a sampling solenoid valve, a sampling pump, a flow meter, and an infrared gas cell connected in sequence; an air zero-calibration branch is connected between the sampling solenoid valve and the sampling pump, and the air zero-calibration branch includes an air sampling head, a condensation filter, a zero-calibration adsorption tube, and a zero-calibration solenoid valve connected in sequence; the zero-calibration adsorption tube includes a gas purification area, a CO2 absorption area, an activated carbon area, an ammonia removal area, and a molecular sieve area distributed in sequence along the air inlet direction, and both ends of each area are encapsulated with absorbent cotton. Through the coordinated cooperation of the bag filter, the three-pass filter, and the condensation filter, the present invention has a comprehensive adsorption effect, can adsorb particulate matters with different molecular sizes, and remove water vapor at the same time, which is beneficial to improving the detection accuracy of the analyzer and extending its service life.

To more accurately calculate a concentration of a measured component when the sensitivity of a main detector or the sensitivity of a compensation detector varies after an influence of an interference component is corrected.SOLUTION: An infrared gas analyzer includes: a measuring cell into which sample gas is introduced; a light source which irradiates the measuring cell with infrared rays; a measured component detector which detects intensity of an absorption wavelength range of a measured component in the infrared rays transmitted through the measuring cell; a first interference component detector which detects intensity of an absorption wavelength range of a component interfering with the measured component in the infrared rays transmitted through the measuring cell; a second interference component detector which detects an interference component contained in the sample gas; and an arithmetic unit which calculates a concentration of the measured component and / or the interference component on the basis of outputs of those detectors. The arithmetic unit has: a first corrected concentration calculation section which corrects difference between the outputs of the measured component detector and the first interference component detector using an output of the second interference component detector to correct an influence of the interference component; and a second corrected concentration calculation section which corrects an influence of the interference component on the basis of a first corrected concentration and the output of second interference component detector.SELECTED DRAWING: Figure 1

The multi-component non-dispersive infrared gas analyzer comprises a shell, a light source part, a detector and a base, a containing cavity is formed in the shell, the light source part is arranged at one end of the containing cavity, the detector is arranged at the other end of the containing cavity, a gas cavity is arranged between the light source part and the detector, and the base is arranged in the containing cavity. A detachable base is arranged between one end of the gas chamber and the detector, and a detachable optical filter assembly is arranged on the base. According to the multi-component non-dispersive infrared gas analyzer with the replaceable optical filter, through the detachable base and the detachable optical filter assembly, the optical filter assembly adaptive to different detected gases can be rapidly replaced, flexible switching of multi-component gas detection is achieved, the equipment development and use cost is reduced, and the operation process is simplified; meanwhile, due to the axial layout of all the structures in the containing cavity, a stable detection light path is constructed, the sealing performance and stability of the detection environment are guaranteed through the closed gas cavity, and the signal intensity and basic precision of gas concentration detection are effectively improved.

The utility model discloses a biomass thermal cracking three-phase product high-efficiency separation device which comprises a cracking assembly which comprises a sliding rail type tubular furnace, and biomass raw materials are heated to a set cracking temperature through the sliding rail type tubular furnace and generate mixed products of gas, liquid and solid particles; the cooling assembly comprises a snakelike condenser and a liquid phase collecting bottle, and liquid phase components in the mixed product are separated through the snakelike condenser and stored in the liquid phase collecting bottle; the detection assembly comprises an on-line infrared gas analyzer, and gas components in the mixed product are detected through the on-line infrared gas analyzer; the purification assembly comprises an ethanol solution bottle and an aqueous solution bottle, alcohol-soluble gas components in the gas-phase components are absorbed through an ethanol solution in the ethanol solution bottle, and water-soluble gas components in the gas-phase components are absorbed through an aqueous solution in the aqueous solution bottle. According to the utility model, efficient separation of three-phase products of biomass thermal cracking is realized.

To improve work efficiency during manufacturing and maintain good sensitivity over the long term. [Solution] The infrared gas analyzer detector (20) comprises first to third infrared transmitting windows (21 to 23) that transmit infrared rays, a front gas chamber forming body (27) to which the infrared transmitting windows are joined to form first and second gas chambers (31, 32), and a sensor unit (60) housed in a containment space (62) communicating with each gas chamber to detect the concentration of the gas to be measured. The gas chamber forming body comprises a frame (81 to 83) to which the first to third infrared transmitting windows are joined, and a main body (34) that forms each gas chamber and to which the first to third frame (34) is joined. The infrared transmitting windows and the frame are joined at room temperature via metal layers (86, 88) formed in the joining regions of each.

The present application relates to carbon dioxide detection technology field, specifically to a kind of petrochemical combustion carbon dioxide content detection equipment, including non-dispersive infrared gas analyzer, the non-dispersive infrared gas analyzer outside is shell, the non-dispersive infrared gas analyzer is provided with gas inlet, exhaust port, the gas inlet is inserted with sampling tube, one end of the sampling tube is sampling head, the inside of the sampling head is provided with the backflow prevention structure of gas, when potential backflow occurs, reverse airflow attempts to enter from the small mouth end of fairing, at this time, the flow resistance of intercepting groove is substantially increased, due to the existence of intercepting groove, reverse airflow needs to overcome greater resistance to pass through, and the gas of backflow bounces back after impacting the baffle at one end of fairing, realize the blocking when gas backflow, the design of conical fairing also shrinks the passage of backflow gas, further improve the resistance, therefore effectively inhibit the reverse flow of gas to prevent its backflow.

The utility model relates to the technical field of highway engineering, and discloses a highway engineering carbon sink metering device. Comprising a box body and an infrared gas analyzer, the infrared gas analyzer is fixedly connected to the inner wall of the box body, gas collecting hoods are fixedly connected to the two ends of the infrared gas analyzer respectively, a blowing pump is fixedly connected to the side wall of the box body, and a gas inlet pipe of the blowing pump extends into the box body. The blowing pump provided by the utility model blows gas into the box body, the concentration of carbon dioxide can be measured through the infrared gas analyzer, subsequent gas flows out of the box body through the gas release barrel, and the gas pushes the piston to drive the spring to be compressed, so that the gas can flow out through the inner wall of the gas release hole; the rubber sealing ring can improve the sealing performance, meanwhile, the blowing pump stops working, the air pressure is reduced, air is prevented from flowing back into the air leakage barrel, the spring can push the piston to block the side wall of the air leakage hole, and air backflow is prevented.

The present invention provides an infrared gas analyzer, which relates to the field of gas analyzers. The infrared gas analyzer includes a product housing and a light source, a filter, and a diaphragm receiver installed inside the product housing. It also includes a self-rotating light shield, which is arranged between the light source and the filter. It also includes a detection chamber and a reference chamber installed in the product housing, which are arranged between the filter and the diaphragm receiver. It also includes an air inlet and outlet assembly installed in the product housing, and the air inlet and outlet assembly is connected to the detection chamber. The infrared gas analyzer can achieve vortex dispersion of the incoming airflow by using the detection chamber, so that when light is irradiated, it is easier to test the absorption of light by different gases, avoiding the problem of uneven gas concentration leading to large errors in the test structure. When the air intake is stopped, the negative pressure pump will empty the interior of the detection chamber, thereby directly maintaining the detection chamber and avoiding inaccurate test structures due to pollution problems in the later stage.

The utility model provides a portable earth surface methane infrared ray gas analyzer used in the field, which belongs to the technical field of infrared ray gas analysis, and comprises a processing mechanism which comprises a storage groove box and a moisture absorption assembly used for drying processing; the moisture absorption assembly comprises a limiting shell sleeve and a connecting plate fixedly installed on the outer side of the limiting shell sleeve. Through the collaborative design of the protection mechanism, the processing mechanism and the positioning mechanism, the stability, the anti-interference performance and the portability of the instrument in a field complex environment are remarkably improved; the processing mechanism realizes 2,400 mm optical path and 1ppm high-resolution detection through a multi-reflection gas chamber and a gas filtering related technology, and a built-in gas pump ensures quick response; the positioning mechanism realizes rapid installation and stable fixation of the moisture absorption assembly, and optimizes internal drying treatment. The overall structure is compact, the aseismic design adapts to the complex field environment, and the requirements for high precision and high efficiency of earthquake monitoring and field operation are met.

This utility model relates to the field of gas analyzer technology, specifically to an infrared gas analyzer, comprising: a housing, a detection component, and a heat insulation component; the detection component is placed in the inner cavity of the housing and is used to detect gas concentration; the heat insulation component is connected to the housing, and a mounting cavity is formed between the heat insulation component and the housing, with the detection component located within the mounting cavity. This utility model, by installing the heat insulation component on the housing, forming a mounting cavity between the heat insulation component and the housing for mounting the detection component, and placing the detection component within the mounting cavity, prevents the detection component from directly contacting the external environment, thereby isolating the detection component from interference from external ambient temperature, and thus avoiding the influence of ambient temperature changes on the output intensity of infrared light, improving measurement accuracy.

The invention provides a natural gas metering method and system, and relates to the technical field of energy metering. The infrared gas analyzer determines the energy of the natural gas according to the mass / volume of the natural gas to be detected, the category of each gas, the content of each category of gas, the high-order molar calorific value of each category of gas in unit mass / volume, the summation factor, the preset molar gas constant, the collected environment temperature, the preset standard atmospheric pressure and the collected environment air pressure; and determining the price of the natural gas according to the energy of the natural gas. It can be understood that the use of the natural gas mainly uses the energy generated during the combustion of the natural gas, so that the reliability of determining the price of the natural gas according to the energy of the natural gas by accurately calculating the energy of the natural gas is high.

1. The name of the design product: explosion-proof infrared gas analyzer. 2. The use of the design product: explosion-proof gas analyzer for detecting gas concentration in industrial field by using infrared detection principle. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses an infrared gas analyzer for measuring rock stratum carbon dioxide leakage, which relates to the technical field of infrared gas analyzers and comprises an analyzer main body, a gas inlet pipe and an exhaust pipe are arranged on the front end face of the analyzer main body, and a filtering mechanism matched with the gas inlet pipe and the exhaust pipe is arranged at the front end of the analyzer main body. The filtering mechanism comprises a fixed seat, a turntable, a filter element and a fixed cover, the fixed seat is fixedly mounted on the front end surface of the analyzer main body through bolts, the turntable is mounted at the front end of the fixed seat and is rotationally connected with the fixed seat, the filter element is detachably mounted on the turntable, and sliding chutes matched with the turntable are formed in the side end surfaces of the air inlet pipe and the exhaust pipe. The filter has the advantages of automatically cleaning the filter element and quickly replacing the filter element, and solves the problems that dust is accumulated on equipment due to the fact that dust and other particulate matters enter the analyzer, time and labor are consumed when the filter is frequently replaced, and the continuous monitoring work flow is interrupted in the prior art.

The invention relates to the technical field of vehicle refrigerant analysis, and discloses a vehicle refrigerant analysis method based on a Fourier transform technology, which comprises the following steps: acquiring an infrared absorption spectrum of a calibration gas with known concentration; the method comprises the following steps: determining a model range, preparing calibration gas, preselecting a quantitative wave band, preprocessing and calibrating an instrument, collecting spectral data, fitting a verification model and measuring a quantitative limit, so as to construct a quantitative relation model of a refrigerant light absorption signal response value and concentration; based on the quantitative relation model, introducing a gas sample in the leakage test cabin into a Fourier infrared gas analyzer, collecting spectrums in real time according to modeling consistent parameters, and recording moments to realize real-time online monitoring analysis of the refrigerant; the technical problems that in the prior art, quantitative precision is low, and real-time online monitoring cannot be achieved are solved.

The invention relates to a gas analyzer module (1) for analyzing a measurement gas (7), comprising:-a light-pneumatic detection system (11) designed to detect infrared radiation (2) radiated through the measurement gas (7), the light-pneumatic detection system (11) comprising a pressure or flow-sensitive sensor (14), and the light-pneumatic detection system (11) being designed to generate a measurement signal, the measurement signal being detected by the light-pneumatic detection system (11); -a compensation system (6, 13a, 13b) designed to generate a compensation signal in order to compensate for disturbance effects, the compensation system comprising further pressure or flow-sensitive sensors,-an analysis system (20) designed to generate a measurement result as a function of a difference between the measurement signal and the compensation signal, and-a reflection system (15, 16) designed to reflect the measurement result on the basis of the difference between the measurement signal and the compensation signal. The reflector is designed to reflect back the infrared radiation (2) that has passed through the optical-pneumatic detection system (11) to the optical-pneumatic detection system (11). The module (1) is characterized in that the reflection system (15, 16) comprises:-a reflection plate (17) comprising a rough surface designed to diffuse back the infrared radiation (2) radiated onto the reflection plate (17) to the light-pneumatic detection system (11), and-one or more spacers (18a, 18b, 18c, 18d, 18e, 18f) designed to provide a specific distance (19) between the reflection plate (17) and the light-pneumatic detection system (11), to determine the amount of infrared radiation (2) diffusely reflected back to the opto-pneumatic detection system (11).

The utility model discloses a portable infrared gas analyzer which comprises an analyzer body used for detecting gas; the fixing assembly is arranged on the side edge of the analyzer body, and the fixing assembly is used for fixing the analyzer body at a required position; the telescopic assembly is arranged on the analyzer body and comprises a telescopic part and a clamping part, one end of the telescopic part is connected with the analyzer body, the other end of the telescopic part is connected with the clamping part, the telescopic part is used for being connected with the analyzer body in a telescopic mode, and the end, away from the telescopic part, of the clamping part is connected with the outside; and the analyzer body is telescopically connected through the telescopic assembly. The problem of gas detection and analysis in a complex environment is solved.

The utility model relates to the technical field of gas detection, and particularly discloses an industrial infrared gas analyzer which comprises an infrared gas analyzer body, a supporting piece and a handle, and the supporting piece comprises a plurality of supporting wheel sets and a limiting plate. The handles comprise a first handle and a second handle which are hinged to the two ends of the different sides of the top of the infrared gas analyzer body respectively, and the supporting wheel set comprises a mounting base detachably mounted at the bottom of the infrared gas analyzer body, a connecting frame hinged to the mounting base and a plurality of supporting rollers evenly and rotatably connected to the inner side of the connecting frame; the diameter of the supporting rollers is larger than the width of the connecting frame, the limiting plate is located on the outer side of the mounting base, inner side supporting blocks are symmetrically arranged at the end, away from the limiting plate, of the connecting frame, the first handle and the second handle are both L-shaped rod bodies, and the free end of the first handle and the free end of the second handle can be perpendicularly and tangentially connected. The problem that a traditional industrial infrared gas analyzer is of a box structure and is inconvenient to carry and use is solved.

The invention provides an infrared gas analyzer, and relates to the field of gas analyzers. The infrared gas analyzer comprises a product shell, and a light source, a light filter and a diaphragm receiver which are arranged in the product shell, and further comprises a self-rotating light chopper which is arranged between the light source and the light filter, and further comprises a detection chamber and a reference chamber which are arranged in the product shell, and the air inlet and outlet assembly is arranged in the product shell and is connected with the detection chamber. According to the infrared gas analyzer, vortex dispersion of entering gas flow can be realized by utilizing the detection chamber, so that the light absorption condition of different gases can be more easily tested during light irradiation, the problem of large error of a test structure caused by non-uniform gas concentration is avoided, and the interior of the detection chamber can be emptied by the negative pressure pump after gas inlet detection is stopped, so that the detection efficiency is improved. Therefore, the detection chamber is directly maintained, and the problem of inaccurate test structure caused by pollution in the later period is avoided.

The utility model relates to gas infrared gas analyzer technical field, and disclose a kind of high-precision gas analyzer.The high-precision gas analyzer includes: flue pipe, the inside fixed mounting of flue pipe has fixed plate, the top fixed mounting of flue pipe has top cover, the outside fixed mounting of flue pipe has support ring, the top fixed mounting of support ring has PLC controller, the left side of flue pipe is inserted and installed with infrared gas analyzer, the left side of flue pipe is inserted and installed with barometer, barometer is located the top of fan blade, the air pressure size below the fixed plate in flue pipe can be monitored in real time, and monitoring data is transmitted to PLC controller, set air pressure threshold interval by PLC controller, by PLC controller to compare actual data with set threshold value, and according to comparison data to adjust the rotational speed of driving motor and the rotation angle of movable plate, to adjust internal flue gas air pressure, so that air pressure is kept at proper size, to facilitate infrared gas analyzer to analyze flue gas.

The utility model provides a low water vapor interference type gas sample inlet pipe, which relates to the technical field of gas detection devices, and comprises a needle valve, a gas delivery pipe, a joint, a heating jacket and a heating belt, the gas outlet end of the needle valve is connected with the gas inlet of the gas delivery pipe, the gas outlet of the gas delivery pipe is connected with the joint, and the heating jacket is arranged on the outer side of the needle valve and is connected with a temperature controller. And the heating belt is mounted on the outer side of the gas conveying pipe and is connected with the heating sleeve. The problem that a traditional gas inlet pipe of an infrared gas analyzer is easy to bring water in air to influence a detection result can be solved.

The present invention is one which reduces running costs by eliminating the need for a catalyst, which is a consumable item, and comprises a measurement cell into which sample gas is introduced, an infrared light source that irradiates the measurement cell with infrared light, an infrared light detector that detects infrared light that has passed through the measurement cell, and a gas filter within which a plurality of interference components that interfere with a measurement component in the sample gas are enclosed.

A water vapor interference simulation device for an infrared gas analyzer belongs to the technical field of auxiliary detection equipment and comprises bottled gas, a flow sensor, a pressure sensor, a temperature sensor, a humidity sensor, a voltage display meter, a valve, a bottom plate, steam generation equipment, a voltage regulation module and a gas generation tube. Bottled gas, a flow sensor, a pressure sensor, a temperature sensor, a humidity sensor, a voltage display meter, a valve, steam generating equipment and a voltage adjusting module are included, a gas generating pipe is installed on a bottom plate, and each set of steam generating equipment comprises a heating cylinder, an electric heating pipe, a safety valve, a water adding pipe and a liquid level switch. The device has a compact structure, is convenient to use, can synchronously input gases obtained by uniformly mixing water vapor with nitrogen or carbon monoxide gas at different temperatures and different concentrations into the infrared gas analyzer under the combined action of related structures, and plays a favorable technical support for multi-mode calibration of performance data of the infrared gas analyzer.

The invention relates to the technical field of carbon dioxide detection, in particular to petrochemical combustion carbon dioxide content detection equipment which comprises a non-dispersive infrared gas analyzer, a shell is arranged outside the non-dispersive infrared gas analyzer, the non-dispersive infrared gas analyzer is provided with a gas inlet and a gas outlet, a sampling pipe is inserted into the gas inlet, and a gas outlet is formed in the gas outlet. A sampling head is arranged at one end of the sampling pipe, a gas backflow prevention structure is arranged in the sampling head, when potential backflow occurs, reverse airflow tries to enter from the small opening end of the flow guide cover, at the moment, airflow resistance can be greatly increased by the intercepting groove, and due to the existence of the intercepting groove, the reverse airflow needs to overcome larger resistance to pass; and the backflow gas is bounced back after impacting the baffle plate at one end of the flow guide cover, so that the backflow of the gas is blocked, and meanwhile, the design of the conical flow guide cover can shrink a channel of the backflow gas, so that the resistance is further improved, and the reverse flow of the gas is effectively inhibited and the backflow of the gas is prevented.

The invention provides an automatic calibration device and calibration method for an infrared gas analyzer, and the calibration device comprises a measurement gas chamber which comprises a first chamber and a second chamber, and nitrogen is packaged in the first chamber and the second chamber; the calibration gas chamber comprises a third chamber and a fourth chamber, nitrogen is packaged in the third chamber, and calibration gas with a proper proportion is packaged in the fourth chamber; in the first state, the first chamber corresponds to the reference chamber, and the second chamber corresponds to the sample chamber; in the second state, the third chamber corresponds to the reference chamber, and the fourth chamber corresponds to the sample chamber. The infrared gas analyzer automatic calibration device and calibration method provided by the invention are used for calibrating the zero end point of the component to be measured, and through the structural arrangement, when the infrared gas analyzer is subjected to zero calibration and range calibration, only nitrogen needs to be prepared on the use site, and range gas does not need to be prepared, so that the calibration efficiency is greatly improved. The problem of emission of flammable and explosive gas or toxic and harmful gas during zero point calibration and range calibration is effectively solved.

To improve work efficiency during manufacturing and maintain good sensitivity over the long term. [Solution] The infrared gas analyzer detector (20) comprises first to fourth infrared transmitting windows (21 to 24) that transmit infrared rays, a front gas chamber forming body (27) and a rear gas chamber forming body (28) to which the infrared transmitting windows are joined to form first to third gas chambers (31, 32, 49), and a sensor unit (60) housed in a containment space (62) communicating with each gas chamber to detect the concentration of the gas to be measured. The gas chamber forming body comprises a frame (35a to 35c, 52) to which the first to fourth infrared transmitting windows are joined, and a main body (34, 51) that forms each gas chamber and to which the first to fourth frame (34 to 51) is joined. Each infrared transmitting window is joined to the frame via a joining member (45 to 48) which is made of low melting point glass.

The application discloses an environmental pressure compensation device of an infrared gas analyzer under constant temperature conditions, which comprises a sealed box body, a hollow cylindrical working gas chamber shell is arranged in the sealed box body, the upper surface of the working gas chamber shell is attached to the top end upper surface of the sealed box body, the lower surface of the working gas chamber shell is attached to the lower surface of the sealed box body, the working gas chamber shell divides the inside of the sealed box body into a working gas chamber and an adjusting gas chamber, and the infrared gas analyzer is arranged in the working gas chamber. The application also provides an environmental pressure compensation method of the infrared gas analyzer under constant temperature conditions. The environmental pressure compensation device and the compensation method of the infrared gas analyzer under constant temperature conditions reduce the influence of temperature and pressure changes in the environment of the infrared gas analyzer on the measurement accuracy, and provide a theoretical method and technical equipment for industrial environmental gas concentration measurement.

The present invention discloses a multi-head gas analysis device, which relates to the technical field of infrared gas analyzers and includes a sampling joint body. The sampling joint body includes a sampling tube, a threaded port, a double-headed connecting pipe, an upper steel ball and an upper spring. During the use of the present invention, through the structural arrangement of arranging multiple groups of sampling joint bodies side by side on the side edge of the infrared gas analyzer, the sampling requirements of multiple groups of sampling tank bodies can be met, effectively improving the number of samples to be detected and the detection efficiency. Moreover, by controlling the establishment of the gas passage from the sampling tank body to the sampling tube through air pressure, it can ensure that the gas samples to be detected in multiple sampling tank bodies can be sequentially detected and the gas samples in the sampling chamber can be evenly and thoroughly discharged into the infrared gas analyzer for detection. And since the gas samples to be detected in the sampling chamber are isolated from the introduced high-pressure gas by the piston plate, the detection accuracy of the gas samples to be detected can be guaranteed.