32 results about "Gas induction" patented technology

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 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.

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 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 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 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.

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 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.

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.

A metal organic source supply device comprises: a steel cylinder for storing a metal organic source; the first pipeline is connected with the steel cylinder, one end of the first pipeline extends into the steel cylinder, and the first pipeline is used for introducing carrier gas into the steel cylinder; the second pipeline is connected with the steel cylinder, one end of the second pipeline extends into the steel cylinder, and the second pipeline is used for conveying the metal organic source carried by the carrier gas from the steel cylinder to the reaction device; the third pipeline is connected with the first pipeline and the second pipeline; the fourth pipeline is communicated with the third pipeline and is used for discharging the purging gas in the first pipeline and the second pipeline; the first valve is arranged on the third pipeline and used for controlling connection and disconnection of the third pipeline and the fourth pipeline; and the gas sensing device is arranged on the fourth pipeline and is used for detecting the concentration of the preset type of gas in the fourth pipeline. The safety performance of the metal organic source supply device is improved.

The utility model belongs to the field of gas detection, and particularly relates to a gas inductive sensor with an explosion-proof mechanism, which comprises a gas detector, the front surface of the gas detector is provided with a display screen, and the top of the gas detector is provided with a communication device and an audible and visual alarm; a detection part of a gas detector is improved, an explosion-proof mechanism is arranged at a shell mechanism of an electronic component, an original single-layer shell is changed into a double-layer shell, a gap for isolating air is additionally arranged while the inner shell and the outer shell are arranged in a sleeved mode, gas is physically isolated through filling of inert gas, and the safety of the gas detector is improved. The problem of detonation inducement caused by electric sparks emitted by electronic elements is solved. The sealing ring sleeve matched with the ventilation end pipe is arranged on the outer side of the ventilation end pipe, the two ends of the sealing ring sleeve are embedded into the open grooves of the inner shell and the outer shell, when the gap between the inner shell and the outer shell is filled with inert gas, the gas presses down the sealing ring sleeve, the upper contact face and the lower contact face of the sealing ring sleeve are further sealed, and the dust isolation performance is improved.

The invention discloses a four-side type electronic nose gas sensing chamber with a flow field correction function, which comprises a gas outlet, a gas sensing chamber and a gas inlet, four corners of the gas outlet and the gas inlet are respectively fixed on the gas sensing chamber through screws I, and the four corners of the gas outlet are respectively provided with screw and nut fixing holes I; the four corners of the two ends of the gas sensing chamber are each provided with a second screw and nut fixing hole, first embedded nuts are arranged in the second screw and nut fixing holes, the four corners of the gas inlet are each provided with a third screw and nut fixing hole, the first screws are divided into two sets, the number of each set of first screws is four, and the number of each set of first screws is four. One set of first screws penetrate through the first screw and nut fixing holes correspondingly and are screwed into the second screw and nut fixing holes to be connected with the first embedded nuts, and the other set of first screws penetrate through the third screw and nut fixing holes correspondingly. According to the invention, the gas distribution in the gas induction chamber can be conveniently corrected.

The application discloses a high-pressure gas injection device of an energy storage test system, which comprises a gas tank fixing seat, a gas tank is arranged in the gas tank fixing seat, a threaded groove is arranged at the tank opening of the gas tank, a sealing plate is movably arranged between the threaded groove and the gas tank, a threaded pipe extends into the threaded groove and pushes the sealing plate inward, a sealing groove is arranged on the outer side of the threaded groove, a sealing gasket for the sealing groove is sleeved on the threaded pipe, and a first electromagnetic pulse valve is arranged in the threaded pipe. The high-pressure gas injection device of the energy storage test system is designed with one row of air guide wheels arranged in the upper and lower positions, air flow pushes the air baffle during the injection process, so that the air guide wheels rotate, when the communication flow channel moves to the horizontal position, the two ends are respectively connected to the air inlet hole and the air outlet hole, so that part of the cold air in the injection flow channel is injected into the side position of the energy storage box through the air outlet hole, different working conditions are met, and better use prospect is brought.

The invention relates to the technical field of aircraft power systems, and discloses an inlet-engine-exhaust coupled aero-engine of a gas-driven fan structure and a control method. A power turbine is additionally arranged, gas is introduced through a gas introduction flow path to drive a propulsion fan in an outer duct, and the propulsion fan is driven to drive the engine to rotate; according to the engine, the function of a traditional engine with the adjustable bypass ratio, which is realized by depending on a complex structure, can be met, good working capacity can be always kept in a wider working range and in different flight tasks, and dependence on complex structures such as a multi-rotor system and adjustable parts in the traditional engine with the adjustable bypass ratio can be reduced; and the characteristics of high thrust-weight ratio and low oil consumption can be achieved, so that a light-weight, high-reliability and wide-speed-domain power solution is provided for the aircraft.

The invention provides an underground refrigeration pneumatic ventilation system for preventing spontaneous combustion of coal and diluting gas, which comprises a ventilation device, a temperature sensing device and a gas sensing device, the temperature sensing device is vertically suspended and mounted at an air return corner of a coal mining surface, and the gas sensing device is mounted at the air return corner. The ventilation device is hung in an unshielded area of a roadway at an air return corner, the ventilation device comprises a first-stage spiral blade, a second-stage spiral blade, a refrigeration pipe and a flow meter, the temperature sensing device comprises an anti-explosion shell, a sealing layer, a thermosensitive element and a temperature sensing probe, and the gas sensing device comprises a shell, a filtering part and a vent hole group. A vent hole group is formed in the front end of the shell, gas concentration monitoring is completed through the vent hole group, and a filtering part is connected between the vent hole group and an inner cavity of the shell. When the ventilation device is used, underground compressed air is used as a single power source when the ventilation device is started, electric power or water is not used for driving, no harsh requirements for water quality and water pressure exist, and the ventilation device is economical and practical.

Provided is a heat-generating device that is capable of reducing a temperature difference between an inner peripheral part and an outer peripheral part of a heating element. A heat-generating device 3 comprises: a heat-generating body 14 in which a plate-form member configured from a multilayer film that generates heat through occlusion and release of hydrogen is annularly formed; a sealed container 5 for storing the heat-generating body 14; an introduction line for introducing a hydrogen-containing gas into the sealed container 5; a lead-out line for leading out the gas that was supplied for heat generation in the heat-generating body 14 by occlusion and release of hydrogen in the heat-generating body 14; an induction coil 15 formed by winding a linear electroconductive member around a central axis of the heat-generating body 14 on the outer periphery of the sealed container 5; and a power supply 19 for applying an AC current to the induction coil 15. The power supply 19 can change the frequency of the AC current.

The utility model belongs to the technical field of fire extinguishing equipment, and particularly relates to a fire-fighting detection gas fire extinguishing device which comprises a gas storage tank, and a discharge pipe is mounted in the center of the bottom end of the gas storage tank. The fire source monitor carries out thermal imaging on open fire, data are transmitted to the control center data evaluation module for evaluation, if the data accord with the data set in the data evaluation module, the data evaluation module will send out an electric signal, the telescopic rod relieves closing of the connecting pipe installed at the bottom end of the gas tank, and fire extinguishing is carried out. When some fire disasters are formed, dense smoke is generated at first, the gas sensing device can sense the smoke and transmit data to the data evaluation module, and if fire extinguishing conditions are met, the data evaluation module sends signals to the telescopic rod and the early warning lamp again, so that the alarm is triggered to give an alarm and help information is sent to a nearby fire station. And through dual monitoring of the fire source monitoring device and the gas sensing device, fire disasters can be effectively prevented, and the safety performance is improved.

The pouch-type secondary battery according to the present invention comprises: an electrode assembly; an outer material including an accommodating unit for accommodating the electrode assembly, and a platform unit formed along a periphery of the accommodating unit and having a sealing unit in which a portion of a width is sealed; an electrode lead electrically connected to the electrode assembly and protruding to the outside of the outer material; a lead film disposed between the electrode lead and the external material; a gas sensing unit disposed between the electrode lead and the lead film, and including a transport unit disposed on an exterior of the exterior material, and at least one gas flow path extending from the transport unit toward the electrode assembly via the sealing unit; and a reinforcing film disposed on the lead film to cover at least a portion of the transfer unit.

A sensor assembly and a method of manufacturing a sensor assembly. The sensor comprises a gas sensor, and the gas sensor comprises a gas sensing range; and a package comprising one or more walls, where the walls define a volume to accommodate the gas sensor, and where one wall comprises an opening defining an inlet to the package. The package includes a deflecting surface within the volume, where, in use, the deflecting surface is configured to deliver gas molecules to a gas sensing range.

This application provides a pre-gas supply control method, circuit, and plasma cutting machine. The control method includes: a main control module sending a gas control signal to a gas valve control module in response to a cutting torch test signal; the gas valve control module supplying test gas to the cutting torch at a first moment in response to the gas control signal; a gas sensing device sending a gas feedback signal to the main control module at a second moment upon sensing the test gas; and the main control module setting a target pre-gas supply time for the plasma cutting machine based on the time interval between the first and second moments. This control method can help form a stable plasma arc, improving the arc ignition success rate and cutting quality of the plasma cutting machine.

The utility model discloses an electronic cigarette capable of isolating liquid and preventing circuit failure, which comprises a power supply main body, an atomization main body detachably and electrically connected with the power supply main body, a gas sensing cavity arranged in the power supply main body, and a gas flow switch arranged in the gas sensing cavity and used for starting the power supply main body to supply power to the atomization main body after sensing gas flow, the atomization body is internally provided with an oil storage cavity used for storing tobacco tar, a mist channel formed in the oil storage cavity, a heating core arranged in the mist channel and used for heating the tobacco tar and an air supply and liquid separation part corresponding to the mist channel, and an air guide channel communicated with the ventilation channel is arranged in the air supply and liquid separation part. And the position of the air guide channel is higher than that of the air supply liquid separation part. After the technical scheme is adopted, condensate generated in the mist channel and tobacco tar dripping from the heating core can flow into the gas supply liquid isolation part for isolation, cannot flow into the gas induction cavity to cause failure of the gas flow switch, and cannot flow out of the electronic cigarette to cause oil leakage pollution.

The utility model discloses a multi-exit automatic management and control emergency evacuation device, which is applied to a place with a plurality of exits, and comprises an execution assembly which comprises a plurality of exit management and control switches which are arranged in one-to-one correspondence with the exits and used for controlling opening and closing of the exits; the sensing assembly comprises a fire alarm sensing device, a hazardous gas sensing device and an earthquake sensing device; the general control assembly comprises an automatic control device and a manual control device; the power supply assembly comprises a main power supply and a standby power supply; the execution assembly, the induction assembly, the master control assembly and the power supply assembly are connected through cables. By the adoption of the structure, all the exits can be opened at the first time when the dangerous situation occurs so that people can escape, the situation that the escape path of people in the place is blocked due to the fact that part of the exits cannot be opened in time due to unattended operation or the insufficient number of attended personnel or work negligence is avoided, and smoothness of the emergency evacuation place in the place is guaranteed.