56results about How to "Reduce explosion" patented technology

The invention discloses a four-rotor unmanned aerial vehicle trajectory tracking control method based on a fuzzy disturbance observer. The method comprises the steps that S1, a kinetic model of a four-rotor unmanned aerial vehicle is established; s2, establishing a fuzzy disturbance observer (FDO); s3, establishing a position subsystem tracking controller; and S4, establishing an attitude subsystem tracking controller. According to the four-rotor unmanned aerial vehicle trajectory tracking control technology designed by the invention, the trajectory tracking problem of the unmanned aerial vehicle under the conditions of unknown parameter uncertainty and external disturbance is comprehensively considered, and the uncertainty and external disturbance of system parameters are evaluated based on a fuzzy disturbance observer. Besides, a dynamic curved surface control method is designed, researched and developed to construct a trajectory tracking controller, so that the robustness of the quad-rotor unmanned aerial vehicle is improved, and the explosion problem of differential terms of the system is reduced. For the designed trajectory tracking controller, a stability proof is given, which indicates that the tracking error of the subsystem can be globally consistent and bounded.

The invention discloses a coal mine fireproof monitoring and analysis method based on unmanned aerial vehicle inspection, which relates to the technical field of coal mine fireproof monitoring and analysis, and comprises the following steps: when an unmanned aerial vehicle arrives at a coal mine goaf area for inspection, acquiring environmental parameter information of the coal mine goaf area in real time, wherein the characteristic information comprises gas distribution characteristic information and airflow dynamic characteristic information. According to the method, the gas distribution characteristic information and the airflow dynamic characteristic information are acquired in real time, and the gas distribution index is generated by utilizing the machine learning model which is learned in advance, so that the goaf gas distribution is intelligently evaluated. According to gas distribution indexes, abnormal distribution is divided into low risk, medium risk and high risk, refined inspection strategies such as frequency increasing, path expanding, dynamic height adjusting and multi-machine collaborative operation are adopted for different risk levels, comprehensive monitoring and quick response are achieved, inspection resource distribution is optimized, and coal mine safety accidents are effectively prevented.

The utility model discloses a capacitor protection assembly and a capacitor, and relates to the technical field of capacitors, and the capacitor protection assembly comprises a housing, a cover body, a support, and a conductive assembly. The shell is provided with a containing cavity for containing the capacitor assembly. The cover body is arranged at the opening of the containing cavity in a covering mode. The support is installed on the cover body, and at least part of the support is located in the containing cavity. The conductive assembly comprises a first conductive part and a second conductive part which are connected, the first conductive part is directly or indirectly connected with the cover body, and the second conductive part is installed on the support. The support is provided with an electric fence, the electric fence is arranged on the peripheral side of the second conductive part, when the capacitor assembly breaks down, the cover body expands in the direction away from the support, and the first conductive part and the second conductive part are disconnected. According to the capacitor protection assembly, the capacitor protection capability can be improved, and the fault probability of the capacitor is reduced.

The invention relates to a leakage-proof device for coal mine gas extraction, and belongs to the field of gas extraction. The device comprises a sealing cylinder and a sealing sleeve arranged on the sealing cylinder in a sleeving mode, the sealing cylinder is inserted into the gas hole, and the sealing sleeve covers an orifice of the gas hole; a lifting block which ascends and descends in the axial direction of the sealing cylinder is arranged in the sealing cylinder, and a plurality of arc-shaped expansion rings are arranged on the side wall, inserted into the gas hole, of the sealing cylinder and connected with the lifting block; the expansion ring is constructed to move from a first position to a second position along the radial direction of the sealing cylinder under the pushing of the lifting block, and the expansion ring is embedded into the side wall of the sealing cylinder at the first position; at the second position, the expansion ring abuts against the hole wall of the gas hole to block the gas hole. The device can adapt to gas holes of different sizes, sealing flexibility and reliability are improved, residual gas around the gas holes can be adsorbed and removed, and the risk of gas leakage is further reduced.

The invention discloses a bisphenol AF feeding dust prevention device, which relates to the technical field of feeding dust prevention, and comprises a conveying device, wherein both ends of the conveying device are fixedly mounted with load-bearing plates, a rotating motor is fixedly mounted on the surface of the conveying device, a supporting foot is fixedly mounted on the bottom of the load-bearing plate, vertical rods are fixedly mounted on the top of the load-bearing plate, a feeding frame is fixedly mounted between the vertical rods, a feeding port is provided at the bottom of the feeding frame, a top cover is fixedly mounted on the top of the feeding frame, a feeding port is provided on the surface of the top cover, a partition plate is fixedly mounted inside the feeding frame, a No. 1 spring is fixedly mounted on the top of the partition plate, and the partition plate slowly flows out through the opening of a material distribution funnel, and bisphenol AF does not generate dust when feeding, so that the dust generated by bisphenol AF during rapid feeding is prevented from being flammable or toxic with certain chemical dust, thereby reducing the risk of explosion and poisoning.

The utility model relates to a reaction device, and particularly discloses a photocatalytic reduction CO2 reaction device which comprises a water tank, a light source emitter and a heating seat, a heating cylinder is arranged at the upper end of the heating seat, a reaction container is arranged at the upper end of the water tank, a first flow guide pipe and a second flow guide pipe are arranged between the heating seat and the reaction container, and a support is arranged in the reaction container. A catalyst cylinder is arranged at the upper end of the support, and spiral blades are arranged on the outer side of the catalyst cylinder, fixedly connected with the catalyst cylinder and arranged on one side of the first flow guide pipe and one side of the second flow guide pipe. Carbon dioxide and water vapor are input into the reaction container through the two flow guide pipes, and the carbon dioxide and the water vapor entering the reaction container spirally flow along the surfaces of the spiral blade and the catalyst cylinder under the guidance of the spiral blade, so that the carbon dioxide can be in full contact with the water vapor, and the carbon dioxide can fully react with the catalyst cylinder; and the reaction efficiency of the photocatalytic reduction CO2 reaction device is improved.

This application provides an electrochemical apparatus and an electronic apparatus. The electrochemical apparatus includes: a negative electrode, where the negative electrode includes a negative electrode current collector, and a negative electrode active substance layer is provided on a surface of the negative electrode current collector; a positive electrode, where the positive electrode includes a positive electrode current collector, a positive electrode active substance layer is disposed on a surface of the positive electrode current collector, and an insulating layer is disposed on a surface of the positive electrode current collector close to a tab portion; and a separator; where an outer edge of the negative electrode active substance layer is further outward than an outer edge of the positive electrode active substance layer at a facing position; and an inner edge of the insulating layer is in contact with or partially overlaps with the outer edge of the positive electrode active substance layer, and an outer edge of the insulating layer is flush with the outer edge of the negative electrode active substance layer or is further outward than the outer edge of the negative electrode active substance layer. This application is intended to reduce burrs and debris caused by cutting, effectively reduce the impedance in the edge region of the negative electrode, enhance the kinetics of the edge of the negative electrode, alleviate lithium precipitation at the edge of the negative electrode, and reduce the chance of fire or explosion in the electrochemical apparatus.

The utility model relates to the technical field of electrical control cabinets, in particular to an explosion-proof electrical control cabinet which comprises a cabinet body and an auxiliary device, the surface of the cabinet body is rotatably connected with a cabinet door, the auxiliary device is arranged on the surface of the cabinet body and comprises an air feeder, the air feeder is installed on the upper surface of the cabinet body, and the input end of the air feeder body is fixedly connected with an air inlet pipe. The output end of the air feeder is fixedly connected with an air feeding pipe, one end of the air feeding pipe extends into the cabinet body and is fixedly connected with a blowing head, the two sides of the cabinet body are respectively provided with a ventilation hole, and the inner wall of each ventilation hole is fixedly connected with a filter plate. A large amount of hot air in the control cabinet can be rapidly discharged, dust is intercepted, the situation that heat accumulation causes electrical element heating and fire to make contact with dust entering the control cabinet, and consequently explosion is caused is reduced, and the overall safety of equipment is improved.

The invention belongs to the technical field of coal bed gas exploitation, relates to a self-energizing activated drainage gas recovery process, and introduces a self-energizing technology and a fracturing exploitation technology. In other words, before the self-energizing activator is injected, the fracturing technology is adopted to exploit the coal seam, high-pressure liquid or gas is injected into the coal seam, the coal seam is fractured, cracks are opened, and new cracks and channels are created. The self-energizing activator can increase the permeability of the coal bed, improve the pore connectivity, increase the release rate and collection efficiency of the coal bed gas, increase the quantity of the collected coal bed gas and reduce the waste of coal bed gas resources.

The invention discloses a polycrystalline silicon water quenching system, and particularly relates to the technical field of polycrystalline silicon water quenching, and the water quenching system comprises an integrated control unit, a preheating module, a water quenching module, a temperature adjusting module, an automatic material conveying module, a silicon rod crushing module, a heat energy recovery module and a safety monitoring unit. According to the polycrystalline silicon water quenching system disclosed by the invention, through an intelligent optimization algorithm and real-time data acquisition of the integrated control unit, operation conditions are dynamically adjusted to adapt to different silicon rod characteristics, and the water quenching efficiency and uniformity are improved; the safety monitoring unit monitors temperature, pressure and leakage in real time, abnormal operation is automatically stopped, and the safety accident risk is reduced; the heat energy recovery and water circulation purification assembly effectively reduces energy consumption and resource waste, and the energy management assembly optimizes energy efficiency and reduces cost. The rapid replacement and maintenance design simplifies the maintenance process, reduces the maintenance cost and shortens the downtime; the fault diagnosis system reduces accidental shutdown and guarantees production continuity.

The utility model discloses a dry quenching environment dust removal system which comprises a pulse bag type dust remover and a heat storage cooler, and a quick cut-off valve is arranged on a pipeline between an air inlet of the pulse bag type dust remover and an air outlet of the heat storage cooler. The rapid cut-off valve is in electric signal connection with a dust removal fan of the pulse bag type dust remover or a hydrogen content monitor arranged in a dry quenching furnace or a circulating fan of a dry quenching system, and when the dust removal fan and the circulating fan stop running, the controller controls the rapid cut-off valve to close a cut-off pipeline. When the hydrogen content monitor detects that the hydrogen content in the dry quenching furnace exceeds the standard, the controller controls the quick cut-off valve to close and cut off the pipeline; according to the utility model, the quick cut-off valve is arranged on the pipeline between the outlet of the heat storage cooler and the inlet of the pulse bag type dust collector, so that the possibility of explosion of the dust removal system is reduced, and the overall stability of the dust removal system is improved.

The embodiment of the utility model provides a battery module and electric equipment. The battery module comprises a shell, a battery core assembly, an air inlet valve and an exhaust valve, the shell is provided with a containing cavity, an air inlet hole and an exhaust hole, and the air inlet hole and the exhaust hole can both communicate with the containing cavity. The battery core assembly is arranged in the accommodating cavity; the intake valve includes an open state for opening the intake hole and a closed state for closing the intake hole. The exhaust valve includes an open state for opening the exhaust hole and a closed state for closing the exhaust hole. When the air inlet valve is in the open state, the air inlet hole is used for allowing inert gas to enter the containing cavity, so that the amount of oxygen existing in the containing cavity is reduced. According to the technical scheme provided by the embodiment of the utility model, the probability of explosion and combustion of the battery core assembly is reduced.

The invention relates to a transformer ascending flanged base explosion-proof structure and method, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a middle barrel (21) and a lower barrel (22) are connected in a welded mode through an annular transformer ascending flanged base pressure releasing plate (16), and an inner ring of the transformer ascending flanged base pressure releasing plate (16) is connected with the top of the lower barrel (22) through a second transformer ascending flanged base pressure releasing plate welding seam (18); an outer ring of a transformer ascending flanged base pressure release plate (16) is connected with the bottom of the middle barrel (21) through a transformer ascending flanged base pressure release plate welding seam I (17); and an arc-shaped transformer ascending flanged base explosion-proof protection plate (8) is arranged outside the lower cylinder body (22) and covers the middle cylinder body (21) and the transformer ascending flanged base pressure release plate. The explosion-proof device has the beneficial effects that the explosion of the transformer ascending flanged base caused by thunder, lightning, short circuit and the like can be greatly reduced, so that the loss caused by the explosion is reduced, and the safety of workers is protected.

The utility model relates to a novel pre-charging resistor and a pre-charging module, the novel pre-charging resistor comprises a fixed body, a conductive terminal and a metal shell, the fixed body is fixedly provided with the conductive terminal, the conductive terminal is provided with an insertion part, the insertion part is used for being inserted into a differential connection hole of a circuit board, the metal shell wraps the fixed body, and the metal shell covers the fixed body. And the metal shell is provided with an elastic sheet for fixing. According to the novel pre-charging resistor provided by the embodiment of the invention, the conductive terminal is arranged on the fixed body, the conductive terminal is provided with the insertion part, the insertion part can be directly inserted into the insertion hole of the circuit board to be electrically connected with the circuit board, and wiring harness connection does not need to be arranged between the conductive terminal and the circuit board; according to the BDU zero wiring harness, the problems that the risk of failure of a pre-charging loop is increased, the size is large and the risk of explosion and fire are easily caused by wiring harness connection in the prior art are solved, the BDU zero wiring harness is realized, and the simple installation and fixation of the product are realized by arranging the fixing elastic sheet on the metal shell.

The utility model relates to the technical field of low-temperature control devices, and discloses a gas-liquid separation device which comprises an inner barrel, an outer barrel is sleeved on the surface of the inner barrel, and a barrel cover, a separation pipe, an exhaust pipe and a butt joint pipe are inserted on the upper surface of the inner barrel. The garbage can is reasonable in structure, a user puts the inner can into the outer can, heat preservation protection is carried out through the heat preservation layer and the reinforcing ribs, the blocking plate is installed in the inner can, after the user pushes away the protection semi-ring, the telescopic rod moves, the spring is compressed, and after the inlet pipe, the separation pipe and the exhaust pipe are installed on the can cover, the garbage can is separated. The manual valve penetrates through the outer barrel to be installed on one side of the inner barrel, then the protective semi-ring is loosened, the spring drives the telescopic rod to reset, the protective semi-ring fixes the inlet pipe, the separation pipe, the exhaust pipe and the manual valve, then the barrel cover and the inner barrel are well fixed through the fixing bolt, and the purposes that a pipeline is conveniently and rapidly fixed, installation is easy and flexible, and use is convenient are achieved. Later overhaul and maintenance are facilitated, and the sealing performance of the interface is guaranteed.

The present application provides a harmful waste gas treatment system and a treatment process thereof, and relates to the field of harmful waste gas treatment. It includes: combustion chamber one, combustion chamber two, precooler, washing tower, bag dust collector and main chimney, combustion chamber one is connected to combustion chamber two through an induced draft fan, the precooler is connected to combustion chamber two, the washing tower is connected to the precooler, the bag dust collector is connected to the washing tower, the bag dust collector is connected to the main chimney, combustion chamber one and combustion chamber two are both connected to a spare chimney, and a steel plate is provided on the top of the spare chimney, the outer sleeve of the spare chimney is provided with a support frame, and the support frame is supported on the ground, and an opening and closing assembly is provided between the steel plate and the spare chimney. The present application has the effect of not easily threatening the life and property safety of the staff.

This utility model relates to the technical field of milling machine equipment, specifically to a waste chip cleaning device for milling machines. It includes a chip collecting plate located at the bottom of the milling machine, with a work platform installed inside. A suction head is mounted on the chip collecting plate, its suction end quickly snapped onto the chip sweeping end of a chip sweeping assembly. The pumping end of the suction head connects to the pumping assembly and a cleaning box. The cleaning box also includes a solid-liquid separation structure and a magnetic chip collecting assembly. The magnetic chip collecting assembly includes a permanent magnet cylinder, located inside the cleaning box below the pumping assembly. The solid-liquid separation structure includes a filter plate, located inside the cleaning box, for solid-liquid separation of the waste chips. The chip sweeping assembly includes a chip sweeping end located on the surface of the chip collecting plate and positioned on the displacement end of the displacement assembly, allowing for mobile chip sweeping. This utility model solves the technical problem of rapid classification and collection of waste chips from milling machines.

The invention discloses a pipeline conveying system for solid-state storage for hydrogen production through electrolysis of water, and relates to the technical field of pipeline conveying, the pipeline conveying system comprises a hydrogen tank, a conveying pipeline, a feeding mechanism, a fan, a gas inlet pipe and a gas outlet pipe, a storage tank for solid-state hydrogen storage is arranged on one side of the hydrogen tank, and the conveying pipeline is installed between the hydrogen tank and the storage tank; the feeding mechanism is used for raising and feeding metal powder, the fan is installed on one side of the feeding mechanism, the air inlet pipe is installed at the air inlet end of the fan, and the air outlet pipe is installed at the air outlet end of the fan. By means of the arrangement mode that the conveying pipeline, the feeding mechanism, the draught fan, the air inlet pipe and the air outlet pipe are matched, the draught fan can pressurize and blow out hydrogen in the conveying pipeline and blow metal powder fed and discharged by the feeding mechanism, the metal powder can be blown into an inner cavity of the storage tank, the hydrogen can make full contact with the metal powder, and therefore the metal powder can be fully stored. And the solid hydrogen storage effect of water electrolysis hydrogen production is improved.

The utility model provides a vertical spray curing waste gas treatment device, which relates to the field of waste gas treatment, and comprises a treatment bin, a filter screen and a shunt pipe, two groups of spray pipes are equidistantly arranged in the treatment bin, the filter screen is arranged in the treatment bin far away from the bottoms of the spray pipes, a primary screen is arranged at the bottom of the filter screen, and a secondary screen is arranged at the bottom of the primary screen. A gas conveying pipe is arranged at the bottom of the left side of the treatment bin, a flow dividing pipe is arranged at the bottom of the inner side of the treatment bin, multiple sets of exhaust ports are formed in the two ends of the flow dividing pipe at equal intervals, a gas detector is arranged on the right side of the top of the treatment bin, and a conveying pipe is arranged at one end of the gas detector. According to the waste gas treatment device, waste gas is uniformly discharged into the treatment bin through the shunting pipe and the exhaust port, so that the waste gas is uniformly distributed in the treatment bin, the phenomenon that the local concentration is too high or too low is avoided, meanwhile, the waste gas can be more comprehensively contacted and treated, local accumulation of the waste gas in the treatment bin is reduced, and the treatment efficiency is improved. And meanwhile, local corrosion or damage in the pipeline is also reduced.

The application relates to a food packaging bag, a manufacturing method and a manufacturing device, and relates to the technical field of food packaging bags.The food packaging bag comprises at least two bag surfaces; the bag surfaces are connected oppositely to form a containing cavity; and recessed parts are arranged on the bag surfaces, wherein the recessed parts on the oppositely connected bag surfaces form air outlet channels, and the air outlet channels are in communication with the outside. The application has the effect of reducing the explosion phenomenon during food packaging bag processing.

The energy source is automatically separated from the transport tool. The present application relates to the field of transportation, and provides a safety scheme for a transport tool, which comprises an energy source, an energy conversion system, a monitoring system, an alarm system, a sensing system, an unlocking separation system and an abort system. When the temperature of the energy source exceeds the normal value by 30% to reach a thermal runaway value, the monitoring system sends an alarm through the alarm system; when the temperature of the energy source reaches a thermal runaway irreversible value or the transport tool catches fire, the alarm system sends an alarm and enters an unlocking separation countdown; when the countdown ends, the unlocking system unlocks the energy source according to the separation path of the sensing system, and the energy source falls by gravity; in the falling process, a gear and a spring generate energy storage as standby energy and pop out the wheels; the wheels contact the ground, the motor drives the energy source to leave the transport tool within a certain range through the separation path; when the motor fails, the standby energy stored in the spring is converted into kinetic energy to drive the energy source to leave the transport tool within a certain range; and when people or objects on the transport tool have been evacuated and there are important objects around, the energy source is aborted through an abort switch to avoid harm to the surroundings and improve the safety requirements of transportation.

The invention discloses a control method, device and equipment of a power battery and a medium, and belongs to the technical field of batteries. The method comprises the steps that the first fault frequency of a cooling water pump of the power battery, the second fault frequency of a power supply loop of the cooling water pump and the circulation state of cooling water are obtained, and the circulation state comprises the failure state and the normal state; according to the first fault frequency, the second fault frequency and the circulation state, the maximum charging electric quantity of the power battery is determined; and controlling the charging electric quantity of the power battery to be smaller than the maximum charging electric quantity. According to the method, when thermal runaway happens to the power battery, the power performance of the vehicle is guaranteed, meanwhile, the gas production amount and the heat production amount in the thermal runaway process are reduced as much as possible, spreading of thermal runaway is effectively controlled, the damage degree of the power battery is reduced, and the occurrence probability of fire disasters or explosions is reduced.

The utility model belongs to the technical field of hazardous waste material stirring, and particularly relates to a hazardous waste inert gas explosion-proof stirring furnace which comprises a furnace body, a furnace cavity with an opening in the front side is formed in the furnace body, an inert gas conveyor and a sucking pump which are communicated with the furnace cavity are arranged on the furnace body, and a sealing door for sealing the opening of the furnace cavity is assembled on the front side of the furnace body. A transmission motor is installed on the furnace body, the output end of the transmission motor is fixedly connected with a rotating rod located in the furnace cavity, a plurality of stirring blades are fixedly connected to the outer side of the rotating rod, a conductive set is assembled on the transmission motor and the stirring blades, and a rotating conductive ring electrically connected with the conductive set is installed on the outer side of the rotating rod. And the rotary conducting ring is electrically connected with an electric wire. According to the utility model, by utilizing the stability of inert gas and the export of static electricity in the stirring process, the phenomena of combustion and explosion of hazardous waste materials in the stirring process can be effectively reduced.

This invention relates to the field of high-performance coatings and their application technology, and discloses a corrosion-resistant, fire-resistant, and explosion-proof material, its preparation method, and its application in power tunnels. The preparation method of the corrosion-resistant, fire-resistant, and explosion-proof material includes the following steps: preparing a silicon-containing compound and reacting it with epichlorohydrin and sodium hydroxide to obtain an epoxidized phosphosilicate compound; preparing a tripyridyl compound and reacting it with the epoxidized phosphosilicate compound to obtain a multifunctional modifier; mixing epoxy resin, loaded modified composite nanomaterials, the multifunctional modifier, additives, and a curing agent to obtain a corrosion-resistant and fire-resistant coating; and spraying the corrosion-resistant and fire-resistant coating onto a fire-resistant and explosion-proof substrate to obtain the corrosion-resistant, fire-resistant, and explosion-proof material. This invention, through the combined effect of the various layers of the fire-resistant and explosion-proof substrate and the corrosion-resistant and fire-resistant coating, enables the corrosion-resistant, fire-resistant, and explosion-proof material to possess excellent corrosion-resistant, fire-resistant, and explosion-proof properties. Its application in power tunnels can improve the safety of power tunnels.

The present invention discloses an air conditioner and an air conditioner compressor control method, the air conditioner includes a refrigerant circulation loop, an outdoor heat exchanger and an indoor heat exchanger, a pressure relief valve, an exhaust sensor, an inner disk sensor, an inner ring sensor, and a controller, wherein the controller is configured to: determine whether the air conditioner is in a Freon recovery state or a fine stop valve blockage state based on the inner disk temperature and the inner ring temperature, the inner disk temperature is obtained by the inner disk sensor, and the inner ring temperature is obtained by the inner ring sensor; when the air conditioner is in a Freon recovery state or a fine stop valve blockage state, control the operating states of the compressor and the pressure relief valve based on the operating time of the compressor and the exhaust temperature, thereby reducing the occurrence of explosion caused by the compressor pressure surge under high temperature and high pressure, thereby improving the safety of the air conditioner.

The invention relates to a PEM hydrogen production device BOP system instrument centralized acceptance inspection and detection platform system and a PEM hydrogen production device BOP system instrument centralized acceptance inspection and detection method. The pressure supply unit comprises a gas pipeline, a pure hydrogen cylinder, a pure oxygen cylinder, a hydrogen pressure reducer and an oxygen pressure reducer, the hydrogen pressure reducer and the oxygen pressure reducer are correspondingly communicated with the pure hydrogen cylinder and the pure oxygen cylinder, and the gas pipeline is connected with the hydrogen pressure reducer and the oxygen pressure reducer; the oxygen buffer tank is provided with a plurality of groups of interfaces used for installing a plug-in water level gauge, a pressure detection instrument, a side-mounted liquid level meter and a temperature detection instrument, and an electric heater is arranged in the oxygen buffer tank; the water circulating unit comprises a circulating water pipeline circularly communicated with the oxygen buffer tank and a variable-frequency water pump, and the circulating water pipeline is provided with a plurality of groups of interfaces for mounting a conductivity detection instrument and a flow detection instrument; and the gas analysis unit comprises a hydrogen-in-oxygen analyzer, a trace oxygen analyzer and a dew point analyzer. The acceptance efficiency is improved, and the project risk and cost are reduced.

The utility model relates to the technical field of non-woven fabric winding, and discloses a cutting assembly for a winding machine, which comprises two mounting plates, a motor is mounted on one of the mounting plates, a rotating shaft is rotatably mounted between the two mounting plates, an output shaft of the motor is connected with one end of the rotating shaft, a plurality of mounting cylinders are arranged on the rotating shaft, and the mounting cylinders are connected with the motor. And a cutting blade is mounted on each mounting cylinder, side plates are fixed to the two mounting plates, a top plate is fixed between the two side plates, and a plurality of sharpening assemblies are arranged on the top plate. Through the design of the knife sharpening assembly, it is guaranteed that the cutting blade is always kept sharp in the using process, passivation of the blade is avoided, and therefore it is guaranteed that the cutting effect on non-woven fabric is always kept in the best state, and the product quality and the production efficiency are improved.

The utility model provides a kind of anti-explosion high-voltage cable branch box, including explosion-proof box, it includes inner layer box, outer layer box, cabinet door, reinforcing connecting piece, cable interface, silicon rubber cylinder, grounding structure, pressure relief port, pressure relief passage, elastic pressure relief shield piece;Arc generated in box is guided into ground in time using grounding structure, reduce the explosion problem caused by arc;When internal explosion occurs accidentally, explosion opens the movable part of the elastic pressure relief shield piece blocked outside the pressure relief passage to relieve pressure, reduce the impact of impact on explosion-proof box;The explosion-proof box formed by the reinforcing connecting piece between the inner layer box and the outer layer box has strong mechanical strength, better resist the residual explosion impact force after pressure relief, avoid the danger of device damage explosion.

The explosion-proof flame-retardant structure comprises a lithium battery box, pressure relief explosion-proof structures are fixedly mounted on the left side and the right side of the upper end of the lithium battery box, and a flame-retardant structure is mounted in the lithium battery box. By installing the pressure relief explosion-proof structure, when electrolyte gas is generated inside, the gas can be ejected out through the pressure relief assembly, the gas enables the top cover to be jacked up under the action of the elastic piece, the pressure relief channel is opened, the gas can be released, then the possibility of explosion is reduced, the elastic piece is restored to the initial state when the gas is exhausted to a certain degree, and the explosion-proof effect is achieved. According to the flame-retardant structure, automatic pressure relief is facilitated, explosion and installation are further avoided in cooperation with an explosion-proof shell made of an explosion-proof plate, flame-retardant materials are made by adding brominated flame retardants and can restrain or delay combustion, and drying agents and dry powder are arranged in a storage box, so that the dry powder can be released when a fire occurs in the storage box and the fire is burnt into the storage box; and the fire extinguishing effect can be achieved.