46 results about "Gas induction" patented technology

The utility model discloses a quick plug-pull type grain condition detector for a grain storage bin, which comprises sensors, a transmission cable and a hollow detection vertical rod, the transmission cable and the sensors are arranged in the detection vertical rod, the plurality of groups of sensors are connected and arranged on the transmission cable at intervals along the axial direction of the transmission cable, and the detection vertical rod is arranged on the transmission cable. Each group of sensors at least comprises one of a temperature sensing device, a humidity sensing device and a gas sensing device, and sensing signal output ends of the sensors are connected with sensing signal conductive wire cores in the transmission cable; the gas sensing device adopts one or more of a carbon dioxide sensor, an oxygen sensor, a phosphine gas sensor and a hydrogen fluoride gas sensor, an outer vent hole is formed in the rod wall of the detection vertical rod, an opening for a transmission cable to penetrate through is formed in the upper end of the detection vertical rod, and the lower end of the detection vertical rod is closed. According to the utility model, rapid insertion and extraction of the grain condition detector and temperature and humidity detection of grain piles at different depths are realized, and the detection efficiency of the grain storage bin is improved.

The invention is suitable for the technical field of grouting materials, and provides a grouting material with high durability and good bonding performance and a preparation method. Comprising the following components: 20 to 30 parts of Portland cement, 30 to 45 parts of sulphoaluminate cement, 0.5 to 2 parts of an early strength agent, 15 to 25 parts of fly ash, 5 to 10 parts of silicon dioxide, 0.5 to 1 part of soybean oil, 0.5 to 1 part of vegetable tannin, 1 to 2 parts of a water reducing agent, 0.2 to 0.5 part of fish gelatin, 0.05 to 0.15 part of a retarder and 0.05 to 0.1 part of an air entraining agent. Preferably, the grouting material further comprises blast furnace slag and wood pulp fibers, the mass fraction of the blast furnace slag is 10 to 20 parts, and the mass fraction of the wood pulp fibers is 0.1 to 0.5 part; the mass ratio of the Portland cement to the sulphoaluminate cement is 2: 3, and the early strength agent is one or more of lithium sulfate and lithium carbonate. The durability and binding property of the grouting material are remarkably improved, and the crack resistance, flexibility and constructability of the grouting material are enhanced, so that the grouting material can better adapt to complex and changeable construction environments and long-term load effects and has wide application prospects.

The utility model relates to the technical field of waste gas treatment, and discloses a formaldehyde production waste gas treatment device which comprises an absorption device and further comprises a discharge mechanism, a reaction device and a control device, the side face of the absorption device is fixedly connected with the inner side of the reaction device, and the bottom end of the absorption device is fixedly connected with the top end of the control device. The top end of the discharging mechanism is fixedly connected with the side face of the absorption device, the bottom end of the reaction device is fixedly connected with the top end of the control device, the absorption device comprises a water storage pump and a water conveying pipe, and the top end of the water conveying pipe is fixedly connected with a connecting pipe; the spraying tank and the nozzle are arranged, so that the liquid absorbent can be in full contact with the formaldehyde waste gas, the removal efficiency is improved, the absorbent can be recycled, waste generation is reduced, and certain economic benefits are achieved; by arranging the harmful gas sensor and the water quality sensor, the concentration of discharged gas can be monitored in real time, the system can give an alarm immediately, and therefore measures can be taken in time.

The application discloses a high-protection-grade industrial floor drain device, which comprises a floor drain body, a sewer pipe, a first adsorption assembly, a first sealing assembly, a sensing assembly and a control and warning assembly. The first adsorption assembly is arranged in the sewer pipe. The first sealing assembly comprises a sealing piece and a floor drain sealing liquid. The floor drain sealing liquid is arranged in a containing space of the floor drain body. The sewer pipe is communicated with the containing space and leaks into the floor drain sealing liquid. The sealing piece is located in the containing space and covers the outside of the sewer pipe. The open end of the sealing piece extends into the floor drain sealing liquid. The sensing assembly comprises a liquid level sensing piece and a gas sensing piece. The liquid level sensing piece is used for monitoring the liquid level. The gas sensing piece is used for monitoring the leakage gas. The control and warning assembly is electrically connected with the liquid level sensing piece and the gas sensing piece. When a small amount of leakage occurs, the application can isolate the backflow of contaminated wastewater and toxic and harmful gas, so as to avoid the pollution of the external environment. When a large amount of leakage occurs, the application can warn the relevant personnel to perform emergency treatment, so as to avoid greater safety risks.

The utility model discloses a functional integrated box, belonging to the technical field of boxes, comprising a box, a box body is fixedly installed on the top of the box, a fan is fixedly installed on the right side of the bottom of the inner cavity of the box, a one-way valve is fixedly connected to the left side of the fan, a round cover is fixedly connected to the left side of the one-way valve, a temperature sensing body and a gas sensing body are respectively fixedly installed on the left and right sides of the top of the inner cavity of the box, a loading plate is provided in the inner cavity of the box, a two-way screw is rotatably connected to the front side of the left and right sides of the inner cavity of the loading plate, and a worm gear is provided on the middle fixed sleeve outside the two-way screw. The utility model can achieve the effects of refrigeration temperature control and gas regulation to control oxygen concentration, so that fruits and vegetables can be kept fresh, has good economic benefits, and can also increase or reduce the loading plates inside the box, improving the space utilization rate inside the box.

The utility model provides a tetrasodium glutamate diacetate processing reaction device which comprises a reaction assembly, a monitoring assembly arranged at the upper end of the reaction assembly, a protection assembly arranged on the reaction assembly, a spraying assembly arranged in the protection assembly, a reaction assembly comprising a reaction kettle, and a sealing cover mounted at the upper end of the reaction kettle, a side supporting rod is fixedly connected to the right side of the reaction kettle, a motor is fixedly connected to the lower end of the horizontal plane of the side supporting rod, a monitoring assembly and a limiting hollow ring are arranged to be matched with an output shaft of the motor, an annular linkage rod and a gas sensor are driven to annularly monitor the connecting position of the reaction kettle and a sealing cover, and gas leakage signals can be comprehensively captured in real time; early warning is conducted in time at the initial stage of leakage, operators can take measures rapidly and conveniently, by arranging the protection assembly, positive pressure airflow formed by the fresh air purification pipe and the arc-shaped cover body can restrain diffusion of harmful gas during normal operation, and workshop environment safety is guaranteed.

A pouch-type secondary battery according to the present invention includes an electrode assembly: an outer material including an accommodation unit for accommodating the electrode assembly and a terrace unit formed along the circumference of the accommodation unit and having a sealing unit in which a part of the width is sealed; an electrode lead which is electrically connected to the electrode assembly and protrudes to the outside of the outer material; a lead film disposed between the electrode lead and the outer material; a gas induction unit disposed between the electrode lead and the lead film and including a transmission unit provided on the outside of the outer material and at least one gas flow path extending from the transmission unit toward the electrode assembly via the sealing unit; and a reinforcing film disposed on the lead film so as to cover at least a portion of the transmission unit.

The invention relates to the technical field of air tightness detection, and discloses an air tightness detection device for an automatic chloropropane water cutting tank, which comprises a base and a coaming on one side of the base, a tank body is arranged on one side, perpendicular to the coaming, of the base, a refrigeration mechanism is mounted on one side, close to the tank body, of the coaming, and a tank cover part is mounted on one side, away from the coaming, of the tank body. A mounting frame is mounted on the side, close to the tank body, of the tank cover part, a gas sensor is mounted on the side, close to the tank body, of the mounting frame, a detection mechanism is arranged on the side, perpendicular to the base, of the tank cover part, and a counter flange pressing and connecting part is mounted on the side, away from the tank body, of the outlet pipe part. According to the invention, gas in the tank can generate pressure fluctuation due to thermal expansion and cold contraction, so that real leakage can be covered, the gas is misjudged as leakage by a pressure assembly, and the temperature in the tank is reduced by creating cold air on one side of the tank body, so that the combination of residual chloropropane and water in the tank is relieved.

The invention is applicable to the field of fluid mechanics and equipment design, and provides a Venturi ejector structure for a gas return pipeline of a nitrogen phase separator of a large scientific device, which consists of a main jet convergence type active section, a mixing cavity shell, an auxiliary jet convergence type passive section and a diffusion type discharge section. A main jet flow convergence type active section and a main jet flow and auxiliary jet flow mixing cavity are arranged in the main jet flow convergence type active section and mixing cavity shell, and a Venturi gap is formed in the auxiliary jet flow convergence type passive section. Through the Venturi effect, the auxiliary jet gas is ejected after the main jet gas is accelerated, and the auxiliary jet gas is discharged through the diffusion section after being mixed in the mixing cavity. The gas injection and mixing efficiency can be effectively improved, the gas return process of the nitrogen phase separator is optimized, and the nitrogen phase separator is suitable for various gases such as nitrogen and air and has the advantages of being stable in structure, low in energy consumption and easy and convenient to maintain.

The clearance control system and the air entraining device are used for meeting different cooling air requirements of a high-pressure turbine active clearance control system and a low-pressure turbine active clearance control system. The air entraining device is used for entraining air from the outer duct and comprises an air entraining pipe and a partition plate; the air entraining pipe comprises a wall body, and an air entraining channel is enclosed by the wall body; the partition plate is located in the air entraining pipe and evenly divides the air entraining channel into a low-pressure air entraining channel and a high-pressure air entraining channel, the low-pressure air entraining channel is used for entraining air to a low-pressure turbine case, and the high-pressure air entraining channel is used for entraining air to a high-pressure turbine case; the partition plate can rotate so that the circulation sectional area of an inlet of the low-pressure air entraining channel can be different from the circulation sectional area of an inlet of the high-pressure air entraining channel.

The utility model relates to the technical field of inspection assistance, in particular to a novel device for assisting inspection, which comprises a mobile vehicle body, a gas sensing component and a lifting rod are arranged at the top of the mobile vehicle body, and a mounting top plate is rotatably arranged at the top of the lifting rod through a rotating motor. An inspection camera and an infrared induction camera are arranged on the surface of the mounting top plate, and protective shells are arranged on the surfaces of the inspection camera and the infrared induction camera. According to the novel device for assisting inspection, gas in a power plant is detected through the arrangement of the gas sensing assembly, the inspection range of the device is expanded, and the device can conduct visual and infrared detection through the arrangement of the inspection camera and the infrared sensing camera; through the arrangement of the contact electric detection mechanism, the device can be in contact with the power plant equipment to detect whether electric leakage occurs or not, and the danger caused by electric leakage of the equipment to operators is effectively avoided.

The utility model provides a water storage mechanism and a refrigerator, the water storage mechanism comprises a water storage kettle and a sensor, the water storage kettle comprises a water storage cavity and an induction cavity, the water storage cavity is used for storing liquid, the water storage cavity is provided with a water inlet, the water inlet is used for communicating with a water supply system, the induction cavity is arranged on one side of the water storage cavity, and gas is stored in the induction cavity; the air pressure of the induction cavity is increased along with the increase of the liquid pressure in the water storage cavity, the sensor is arranged outside the water storage cavity and the induction cavity, the sensor is used for detecting the pressure change in the induction cavity, and the sensor is further used for being in communication connection with a water supply system so as to transmit pressure change information obtained through detection to the water supply system. The sensor is arranged outside the induction cavity and the water storage cavity, the probability that the sensor makes contact with liquid in the water storage kettle can be reduced, a relatively dry use scene is provided for the sensor, the possibility that water enters the sensor to damage the sensor is reduced, therefore, the detection precision of the sensor can be guaranteed, and the service life of the sensor can be prolonged.

The clearance control system and the air entraining device are used for meeting different cooling air requirements of a high-pressure turbine active clearance control system and a low-pressure turbine active clearance control system. The air entraining device is used for entraining air from the outer duct and comprises an air entraining pipe and a partition plate; the air entraining pipe comprises a wall body, and an air entraining channel is enclosed by the wall body; the partition plate is located in the air entraining pipe and divides the air entraining channel into a low-pressure air entraining channel and a high-pressure air entraining channel, the low-pressure air entraining channel is used for entraining air to a low-pressure turbine case, and the high-pressure air entraining channel is used for entraining air to a high-pressure turbine case. The circulation sectional area of the low-pressure air entraining channel is larger than that of the high-pressure air entraining channel.

The utility model relates to a rubber sealing ring sealing performance testing device which comprises a detection cylinder, a detection channel is formed in the detection cylinder, the detection channel vertically penetrates through the bottom of the detection cylinder, a plurality of first air outlet holes are formed in the top of the detection cylinder, and the first air outlet holes all penetrate through the detection cylinder and are communicated with the detection channel. A detection rod is inserted into the detection cylinder, the detection rod is vertically located in the detection channel, the detection rod does piston movement in the detection channel, an air inlet channel is formed in the detection rod, the air inlet channel vertically penetrates through the bottom of the detection rod and is connected with an external air supply device pipeline, and a plurality of second air outlet holes are formed in the top of the detection rod. The second air outlet holes penetrate through the detection rod and are communicated with the air inlet channel, a rubber sealing ring is transversely arranged at the top of the detection rod, the rubber sealing ring and the detection rod synchronously move, and air sensors are arranged in the first air outlet holes and are electrically connected with an external controller.

The present invention relates to a concrete suitable for internal pouring of a steel lattice column and a construction method thereof, and belongs to the technical field of building concrete. The concrete suitable for internal pouring of a steel lattice column according to the present invention contains the following components by weight: 300-330 parts of silicate cement, 100-120 parts of fly ash, 730-750 parts of sand, 850-900 parts of gravel, 30-50 parts of modified coal gangue, 12-20 parts of composite admixture, 0.15-0.2 parts of air entraining agent, and 180-200 parts of water. The concrete prepared by the present invention has good fluidity, can be constructed for structures with dense steel bars, narrow space, and complex shapes, and is convenient to construct; the overall structure has a high density, and the volume stability is strong, and the curing shrinkage is reduced.

The utility model discloses a vehicle gas detection system and a vehicle, the vehicle gas detection system comprises a storage battery, a gas sensing unit and a digital potentiometer, the storage battery is carried in a front cover of the vehicle; the gas sensing unit is electrically connected with the storage battery and used for detecting the content of poisonous gas in the vehicle front cover. The digital potentiometer is electrically connected with the gas sensing unit and is configured to be capable of receiving and displaying toxic gas content data detected by the gas sensing unit; the microcontroller is electrically connected with the digital potentiometer and the alarm module, and the microcontroller can read the toxic gas content data received by the digital potentiometer and control the alarm module to give an alarm or stop giving an alarm. The gas sensing unit detects the content of poisonous gas in the front cover of the vehicle in real time, the content is displayed through the digital potentiometer, and the concentration condition of the poisonous gas in the front cover of the vehicle can be visually obtained; the microcontroller can control the alarm module to give an alarm so as to remind a driver in time, and the driving safety can be improved.

The invention relates to a multifunctional mine air door adjusting facility which comprises a roadway air door frame, two air door structures, two-way flow guide fans, a remote equipment end and signal receiving and transmitting equipment, the two air door structures are arranged in the roadway air door frame side by side, and multi-zone control devices are arranged on the two sides and between the air door structures correspondingly. The air speed sensors are arranged on the side walls of the two ends of the roadway air door frame, the two-way flow guide draught fans are arranged on the inner top side of the roadway air door frame and arranged between the two sets of air door structures, and the signal receiving and transmitting equipment is connected to the multi-zone control device and connected with the remote equipment end. The arrangement of a mine air door facility is optimized, the mine air door facility is improved into a facility with the functions of adjusting the air speed, sensing harmful gas and assisting in adjusting the air direction, the defects and the problems existing in mine ventilation are solved, in addition, the structure has the functions of remote adjustment and multi-direction independent control, and the device is suitable for being used and popularized.

The utility model discloses a harmful gas detector with multiple detection heads, and relates to the technical field of harmful gas detectors, the harmful gas detector comprises a detector assembly and an auxiliary holding block, the lower end of the detector assembly is sleeved with an external pump assembly, one side of the external pump assembly far away from the detector assembly is connected with a sampling hose, and the sampling hose is connected with the auxiliary holding block. The auxiliary holding blocks are installed on the bottom surface of the detector assembly in a bilateral symmetry mode. According to the harmful gas detector with the multiple detection heads, two groups of auxiliary holding blocks are symmetrically mounted at the bottom of the detector assembly left and right, so that the auxiliary holding blocks can be mounted on any one of the left side and the right side according to the conventional hand of a user, and the user can firmly hold the whole detector assembly; in addition, the external pump assembly and the sampling hose are used, gas needing to be detected can be intensively extracted specifically and quickly and directly conveyed into the gas sensing hole, so that each sensor can perform quick detection, and the detection efficiency and accuracy are guaranteed.

A pouch-type secondary battery according to the present invention comprises: an electrode assembly; an exterior comprising an accommodation unit for accommodating the electrode assembly, and a terrace unit formed along the circumference of the accommodation unit and having a sealing unit in which a portion of the width is sealed; an electrode lead which is electrically connected to the electrode assembly and protrudes to the outside of the exterior; a lead film disposed between the electrode lead and the exterior; a gas induction unit disposed between the electrode lead and the lead film and including a transmission unit provided outside the sealing unit and at least one gas flow path extending from the transmission unit toward the electrode assembly via the sealing unit; and a reinforcing film disposed on the lead film so as to cover at least a portion of the transmission unit, wherein the reinforcing film has a single-layer structure.

The invention is suitable for the field of battery thermal runaway prevention and control, and provides a battery thermal runaway emergency prevention and control device which comprises a battery box body, a battery module, a heat insulation plate, a gas-liquid mixing pump, a water tank, a siphon effect device, a temperature and gas sensing device, a transmission device and a gravity sensing device. When thermal runaway of the single battery occurs, the temperature and gas sensing device triggers the gas-liquid mixing pump, and cooling liquid is sprayed from top to bottom through a siphonic effect to cool the thermal runaway battery; and meanwhile, the gas-liquid mixture drives the transmission device to cut the battery connecting piece, so that the fault battery falls off to the lower box cover. After the gravity sensing device detects the weight change, the lower box cover is automatically separated from the battery box body, so that heat diffusion is prevented. According to the invention, through combination of structural design, siphon liquid cooling and automatic cutting separation technologies, rapid cooling of the thermal runaway battery and fault monomer isolation are realized, and thermal runaway spreading is effectively prevented.

The invention relates to the field of power transmission and transformation equipment, in particular to a power transformer ascending flanged base provided with a CT wire outlet pipe barrel, which comprises a transformer ascending flanged base body and a sleeve CT wire outlet pipe barrel fixedly connected to one side of the transformer ascending flanged base body, the included angle between the transformer ascending flanged base body and the sleeve CT wire outlet pipe barrel is theta Red, theta Red is equal to 90 degrees + theta, and theta is equal to 90 degrees + theta. Wherein theta is the inclination angle when the transformer ascending flanged base body is installed; when the transformer ascending flanged base body is installed in an inclined mode, the wire outlet pipe barrel of the sleeve CT is horizontal, and the oil guide through hole is located in the highest position of the transformer ascending flanged base end cover. An oil gas inducing groove is formed in the transformer ascending flanged base end cover and is used for guiding out insulating oil rich in water vapor in the transformer ascending flanged base body. According to the transformer (electric reactor) ascending flanged base CT wire outlet pipe barrel structure, a dead oil area on the transformer (electric reactor) ascending flanged base CT wire outlet pipe barrel structure can be eliminated, sufficient circulation and heat exchange of insulating oil are achieved, moisture enrichment is reduced, and serious accidents of flashover on the surface of a sleeve and equipment detonation caused by insulation damp of the oil side of the transformer sleeve can be avoided.

The pouch-type secondary battery disclosed in the present specification comprises: an electrode assembly; an exterior material; and a lead assembly. The lead assembly comprises: an electrode lead; an adhesive film disposed on the electrode lead; a gas-guiding film covering at least a portion of the adhesive film and including a permeable portion disposed outward of the exterior material relative to the sealing portion, and including one or more gas flow paths extending from the permeable portion toward the accommodation portion through the sealing portion; and a lead film disposed between the adhesive film and the exterior material and in contact with the exterior material. In addition, the sealing portion has an openable / closable portion in which the gas flow path is located and which can be opened and closed in accordance with an increase in internal pressure, and has a closed portion in which the gas-guiding film is not disposed, wherein a step difference ratio (△T) between the closed portion and the openable / closable portion is 2.00% to 7.00%.

The thermal runaway diffusion prevention device for an electric vehicle battery of the present invention comprises: a battery pack (100) mounted on an electric vehicle, wherein multiple battery modules (120) are arranged on the left and right sides, an exhaust hole is provided on one side of an upper cover (150), a fire extinguishing water hole (131) is provided on the outer side of each lower cover (130), and a fire detection sensor (600) is installed for each module; a battery pack fire extinguishing device that connects fire extinguishing water automatic opening / closing nozzles (510) arranged in a fire extinguishing water supply pipe (500) branched from a cooling water circulation pipe (430) to supply cooling water from a cooling water tank (400) to the fire extinguishing water holes of each lower cover (130) to allow the cooling water to be used as fire extinguishing water; a connecting pipe (200) installed connected to the outer side of the fire extinguishing water hole of the battery module (120); and a gas guiding discharge pipe (230) connected to the connecting pipe (200) of the battery module (120) to guide and discharge fire and gas to the outside. It is characterized by being composed of: a fire extinguishing capsule mixing device (250) installed at the rear end of a gas induction discharge pipe (230) to mix fire extinguishing liquid when fire and gas pass through; a gas discharge port (260) installed at the rear of the fire extinguishing capsule mixing device (250) to be exposed from inside the vehicle body to the outside and then returned to its original position; and a control system (610) that receives a signal from a fire detection sensor (600) and controls the supply to the cooling water circulation pipe (430) and the fire extinguishing water supply pipe (500) and the operation of the circulation pump (410).

The invention relates to the field of rescue notification, in particular to a vehicle-mounted artificial intelligence interaction alarm device and platform, which comprises an impact sensing unit, a sound sensing unit, a gas sensing unit, a positioning unit, a voice unit and a communication unit, the collision sensing unit is a displacement sensor and analyzes displacement data of the vehicle in the X-axis direction, the Y-axis direction and the Z-axis direction to be whether the vehicle changes rapidly or is collided or not; the impact sensing unit judges whether inclination or movement exists or not according to data; the sound sensing unit is a high-magnification sound pick-up and is used for analyzing whether collision sound or quarrel sound exists in surrounding sound signals or not; the gas sensing unit is a high-sensitivity alcohol content and carbon monoxide content sensor and is used for analyzing whether the surrounding alcohol content and carbon monoxide content exceed the standard or not; if abnormal conditions exist, the abnormal conditions are confirmed to be non-false alarms through voice and then notified to an alarm platform through a communication unit; and the alarm platform respectively pushes information to enable the specified object to receive the WeChat, the short message and the call.

The utility model relates to the technical field of recycling devices, and discloses a wet-process lithium battery waste gas automatic recycling device which comprises a spraying tower body, an electromagnetic air valve is installed on the right side of the spraying tower body, a switch motor is installed at the top of the electromagnetic air valve, and a gas sensing switch is installed at the top end in the electromagnetic air valve. A sealing valve is mounted in the electromagnetic air valve, and a main controller is mounted on the right side of the spraying tower body. The induction starting structure is arranged, during use, waste gas enters the electromagnetic air valve, after the gas induction switch in the electromagnetic air valve induces gas, a signal is transmitted to the main controller on the right side of the spraying tower body, and the switch motor, the water suction pump and other equipment are started through the main controller; a sealing valve in the electromagnetic air valve is opened through the switch motor, and waste gas enters the spraying tower body, so that the induction starting function is realized.

The invention relates to the technical field of concrete, and particularly discloses fair-faced concrete and application thereof. The concrete per cubic meter is prepared from the following raw materials: 120 to 165 Kg of water, 120 to 160 Kg of cement, 80 to 100 Kg of mineral powder, 60 to 100 Kg of fly ash, 608 to 838 Kg of fine aggregate and 1288 to 1418 Kg of coarse aggregate, the admixture comprises a water reducing agent, an air entraining agent, a defoaming agent, an alkali activator silica fume and barium chloride. The invention provides fair-faced concrete and application thereof, and the prepared fair-faced concrete reaches C30W6F100 level, and can be used for an upper wall body of a main power house of a hydropower station dam, a water inlet gate pier and a breast wall, a tail water gate pier and a flow channel, a flow channel bottom plate and a pier wall, an upstream retention wall and an end wall and the like.

The invention relates to a vertical oxidizing combustion device for sediment or biological radioactive organic carbon tritium samples, a using method of the vertical oxidizing combustion device and a collecting system of the vertical oxidizing combustion device. Comprising a combustion oxidation module which comprises a vertical separable combustion pipe, at least two air inlet pipes, an air entraining part and a heater; the combustion tube comprises a base and a fixed part, the base can be separated from or combined with the fixed part in a lifting mode, and a combustion chamber is arranged in the combustion tube; the gas inlet pipes extend into the combustion chamber from the upper part and the lower part respectively and are used for introducing combustion-supporting gas into the combustion chamber in the vertical direction respectively, so that the combustion-supporting gas forms vortex to promote sufficient combustion of a sample; the air entraining part is arranged at the top of the fixing part and is used for leading out gas formed by sample combustion; the heater sleeves the combustion tube and is used for heating the sample to reach an ignition point and combusting the sample; the system further comprises an oxidation catalysis module and a three-way catalysis module. The combustion device is thorough in combustion and high in gas harmlessness degree.

The invention provides a pre-air-supply control method, a pre-air-supply control circuit and a plasma cutting machine. The control method comprises the steps that a main control module responds to a cutting gun test signal and sends a gas control signal to a gas valve control module; the gas valve control module responds to the gas control signal and supplies test gas to the cutting gun at a first moment; the gas sensing device sends a gas feedback signal to the main control module at a second moment when sensing the test gas; and the main control module sets the target gas pre-supply time of the plasma cutting machine according to the time interval between the first moment and the second moment. The control method can help to form a stable plasma arc, and the arc striking success rate and the cutting quality of the plasma cutting machine are improved.

Plasma energy equipment is used to solve the problem of exhaust gas emissions inside conventional processing facilities. [Solution] The furnace body includes a heating module and a gas induction device, the furnace body having an internal processing space and a gas collection passage, the heating module being installed in the furnace body, and the gas induction device being installed in the internal processing space, further including a first tube and a second tube, each having a hollow space inside and a plurality of first through holes and a plurality of second through holes, the first tube being fitted into the second tube, and gas being able to flow from the internal processing space through the plurality of first through holes, the plurality of second through holes, the space inside the first tube and the space inside the second tube, and further to the gas collection passage. This allows exhaust gas from inside the furnace body to be effectively discharged.