327results about How to "Avoid explosion" patented technology

The invention provides an OFDM signal receiving and processing system and method suitable for an NAVDAT system. According to the method, the characteristics that NAVDAT system signals have synchronous headers, pilot frequencies and the like are fully considered, firstly, the synchronous headers are used for carrying out correlation operation on received data to search a frame starting point, and a signal frame to be demodulated and decoded is obtained in combination with a constant false alarm detection algorithm; and subsequently, carrying out symbol synchronization to determine the FFT window position. Secondly, in combination with a discrete pilot signal, estimating an integral multiple frequency offset error, namely coarse synchronization, and further realizing estimation of a decimal multiple frequency offset error, namely fine synchronization, so as to realize frequency synchronization. And then, channel estimation is carried out by using the pilot signal and adopting a least square method to obtain the channel frequency response of the pilot, the frequency response of the complete signal is obtained through interpolation, and the rough estimation result is further processed through the designed RCAFCN network to obtain accurate channel estimation, so that the original OFDM signal is recovered. And finally, extracting a data part in the OFDM signal according to a frame structure, realizing soft demodulation through a log-likelihood ratio mode, decoding data of a signaling part by using a polarization code, and decoding data of a service part by using a low-density parity check code, thereby realizing complete demodulation and decoding. The method provided by the invention can effectively reduce inter-symbol interference and inter-carrier interference existing in OFDM signals, compensate channel distortion, reduce noise influence, improve decoding precision, improve communication quality, realize optimization of NAVDAT system baseband processing, and guarantee sailing safety of ships on the sea by combining with an existing marine broadcast system.

The invention relates to the technical field of energy storage system anomaly detection, and particularly discloses an abnormal state detection method for a liquid-cooled energy storage system, and the method comprises the steps: analyzing the environment where the liquid-cooled energy storage system is located, obtaining the feature value of the environment, analyzing the use state of a cooling system of the liquid-cooled energy storage system, and obtaining the feature value of the environment; judging whether the cooling system is abnormal or not and determining a cooling threshold value of the liquid-cooled energy storage system, analyzing an actual operation state of the liquid-cooled energy storage system, judging whether the liquid-cooled energy storage system is abnormal or not and performing abnormal detection on a battery unit of the liquid-cooled energy storage system, and determining an overheating detection abnormal level of the battery unit; the problem that traditional liquid cooling system anomaly detection depends on a fixed rule or a preset threshold value and lacks intelligent data processing and self-adaptive adjustment capability is solved, the intelligent level of system operation is improved, and the stability and safety of the system are further improved.

The invention discloses an ablation-resistant long-fiber reinforced nylon material for a battery pack, and relates to the technical field of nylon materials, the ablation-resistant long-fiber reinforced nylon material comprises the following raw material components by weight: 60-80 parts of nylon resin powder, 30-50 parts of a long-fiber reinforced material, 10-18 parts of aluminum diethylhypophosphite master batch, 8-15 parts of bromine-antimony composite master batch, 3-7 parts of montmorillonite, 12-20 parts of aluminum hydroxide, and 2-6 parts of nano-silica. The composite material is prepared from the following components in parts by weight: 1-4 parts of carbon nanotubes, 0.5-1.2 parts of an antioxidant I, 0.3-0.8 part of a lubricant I, 2-5 parts of a compatilizer, 0.1-0.4 part of a nucleating agent and 0.2-0.6 part of an anti-ultraviolet agent. By adding the diethyl aluminum hypophosphite master batch, the flame retardant property of the nylon material is improved, the processability of the nylon material is improved, the ablation resistance of the nylon material is improved, and the problems of insufficient flame retardant property, poor processability and poor ablation resistance of the nylon material can be solved.

The invention relates to a perfluoro wide-temperature electrolyte for a lithium battery and application thereof, the wide-temperature electrolyte comprises a lithium salt, an additive and a plurality of perfluoro mixed solvents, the electrolyte capable of stably working in a wide temperature range (-80-80 DEG C) is successfully constructed, and the excellent electrochemical performance of the lithium battery at the wide temperature is realized. The electrolyte additive disclosed by the invention mainly comprises one or more of hexafluoroisopropoxy cyclotriphosphazene, 3-(2, 2, 2-trifluoroethoxy) propionitrile, 3-(2, 2, 2-trifluoroethoxy) butyronitrile, 3, 4-fluoroethylene sulfate and 4-trifluoromethyl-ethylene sulfate, and the fluorine-containing additive is good in flame retardant effect, moderate in viscosity, good in system compatibility, good in corrosion resistance and good in corrosion resistance. And a protective film can be formed on the surface of the positive electrode of the lithium battery, so that the high-pressure and high-temperature cycle performance of the battery is improved, the electrochemical performance of the battery is not influenced at all, the self-extinguishing time of the electrolyte is obviously shortened, the flame retardant property and the conductivity are excellent, the overcharge resistance of the lithium ion battery is also obviously improved, and the safety performance of the battery is improved.

The utility model discloses a dustproof heat dissipation type LED mining lamp which comprises a miner lamp body, heat dissipation fins are arranged on the upper surface of the miner lamp body, a fixing box is fixedly connected to the outer surface of the miner lamp body, a motor is fixedly connected to the top inner wall of the fixing box, the output end of the motor is fixedly connected with a rotating shaft, and the rotating shaft is fixedly connected with a power source. The outer surface of the rotating shaft is fixedly connected with a fan, and the inner surface of the fixing box is fixedly connected with an air pipe. Heat generated by the miner lamp body is effectively dissipated out in time through the cooling fins, the motor, the rotating shaft, the fan and the filter screen, so that the temperature of the miner lamp body in the using process is kept within a safe range, the miner lamp body is prevented from being damaged or exploded at a high temperature, the filter screen can also prevent external dust from entering the fixing box, and the miner lamp is convenient to use. And the miner lamp body can be effectively kept clean under the cooperation of the air pipe and the spray head, so that the stability of the lighting effect is ensured, and the safe operation of miners in a well is ensured.

The invention relates to the technical field of battery heat dissipation devices, and discloses a battery heat dissipation method, a battery heat dissipation device and a battery pack, the battery heat dissipation device comprises a shell, a sealing cover is arranged on the inner wall of the shell, and a water cooling plate is fixedly assembled at the top of the sealing cover. By means of the shell, the sealing cover, the water cooling plate and the fan structure, in the operation process of the device, when the temperature of the body rises rapidly due to rapid rising, air pressure can be increased through the internal temperature, a piston is pushed to move, a second reset spring is compressed, and the space where one body is located is communicated with the space where the other body is located; meanwhile, a water cooling plate is controlled to operate through a controller, energy loss caused by continuous operation of water cooling in the normal operation state of the body is prevented from being increased, a movable plate is pushed to conduct bump detection operation on the body in cooperation with movement of a piston, and then the operation temperature of the body is accurately monitored, and the bump condition of the body is detected; therefore, a user can maintain the device and the body in time.

The invention relates to an electric vehicle charging control method and circuit, a charging device and a storage medium. The method comprises the following steps: detecting whether the charging device obtains direct-current input voltage; if the direct-current input voltage is obtained, the charging device is started to charge a vehicle battery; and carrying out charging monitoring on the charging process to obtain a charging current, and if the charging current reaches a preset current value, stopping charging by the charging device. Whether the DC input voltage exists or not is detected before charging, and then whether the charging device is started for charging or not is determined; real-time monitoring is carried out in the charging process, charging is cut off in time when the charging current reaches the preset current value, battery explosion, battery life damage and electric quantity waste caused by long-time charging after the battery is fully charged are avoided based on multi-layer charging protection, and the charging safety of the electric vehicle battery is improved.

The invention relates to the technical field of gas-solid phase catalytic reaction equipment, and discloses a gas-solid phase catalytic reactor, which comprises a reactor body and a plurality of catalyst bed layers arranged in the inner cavity of the reactor body, the plurality of catalyst bed layers are arranged at intervals along the flowing direction of reaction raw materials, the discharge side of each catalyst bed layer is provided with a quenching filler layer, and the discharge side of each catalyst bed layer is provided with a quenching filler layer. The quenching filler layer is arranged to be capable of quenching flames generated by the reaction raw materials; according to the invention, through a plurality of catalyst bed layers arranged at intervals, the intensity of gas-solid phase catalytic reaction is directly reduced, so that combustion explosion of combustible gas in reaction raw materials caused by release of excessive heat is avoided; the quenching filler layer is used for quenching flames possibly generated by reaction raw materials, so that combustible gas and oxygen can be subjected to a gas-solid phase catalytic reaction within the explosion limit, the reaction rate is increased, the reaction efficiency is improved, the economic benefits are further improved, and the device has the advantages of being safe and reliable.

The utility model discloses an automatic drilling and monitoring device of a coal mine drilling machine, which relates to the technical field of coal mine drilling and comprises a base, a machine body and drilling equipment, a round cylinder is arranged on a shell of the drilling equipment, a round hole is arranged on the inner bottom surface of the round cylinder, and a methane detector body is arranged in the round cylinder. Control equipment matched with the methane detector body is arranged on the front end surface of a shell of the machine body, and an alarm is mounted on the top surface of the shell of the machine body; through cooperative use of the methane detector body, the control equipment and the alarm, methane at the punching position can be conveniently detected, the phenomenon of explosion caused by too high methane content is avoided, and the safety of coal mining is improved.

The invention discloses a polyarylether sulfone polymer and a preparation method and application thereof. The preparation method of the polyarylether sulfone polymer comprises the following steps: carrying out condensation polymerization on a bisphenol compound and a dihalogen diphenyl sulfone derivative, boiling, washing and drying to obtain polyarylether sulfone resin. According to the polyarylether sulphone resin disclosed by the invention, by introducing benzoyl, the conjugation degree of a main chain of a polymer is increased, and the rigidity of the main chain is improved, so that the polyarylether sulphone resin has good thermal stability and dimensional stability; meanwhile, the hydrophilicity of the resin is improved due to the increase of carbonyl. The development and utilization prospects in the fields of sewage treatment, gas separation, solid electrolyte, battery diaphragms and the like are very wide. The invention aims to provide a novel high-temperature-resistant hydrophilic polyarylether sulfone resin and a preparation method thereof, i.e., a benzoyl group is introduced into a main chain structure of polyarylether sulfone, so that the structural rigidity of a polymer is improved, and the hydrophilicity is increased.

The invention provides a foam dust suppression material as well as a preparation method and application thereof. The foam dust suppression material comprises a foaming agent, a surfactant, a thickening agent, inorganic salt and a solvent; wherein the foaming agent comprises soybean protein isolate and / or collagen; the surfactant comprises an anionic surfactant and / or a nonionic surfactant; the inorganic salt comprises one or more of potassium sulfate, magnesium chloride, sodium sulfate and sodium chloride. According to the foam dust suppression material, specific components are adopted, all the components cooperate with one another, and the dust suppression material is high in foaming rate, good in stability, good in dust suppression effect, environmentally friendly, non-toxic to the human body, capable of protecting the health of workers and improving the comfort level of the working environment, low in cost and good in economic benefit and social benefit.

The utility model relates to the field of oil storage and transportation, in particular to a safe oil storage and transportation device. The utility model provides an oil product safety storage and transportation device which comprises a double-layer tank body, a leak detector, a baffle valve, an anti-overflow ball floater, a floating sensor, a saline water pressure sensor, an oil outlet pipe and the like, the leak detector is installed on the left side of the double-layer tank body, the baffle valve is installed on the double-layer tank body, and the anti-overflow ball floater is installed on the double-layer tank body. The double-layer tank is provided with a floating sensor, the right side of the double-layer tank is provided with a brine pressure sensor, and the bottom of the double-layer tank is connected with an oil outlet pipe. The pressure relief valve arranged in the deflation pipe is started, so that gas in the double-layer tank body flows into the deflation pipe, then flows into the one-way valve from the deflation pipe and then flows into the air filter from the one-way valve, the air filter filters the gas, pollution to the surrounding environment is prevented, and redundant gas is conveniently released; and explosion caused by excessive pressure in the double-layer tank body is prevented.

The invention relates to the technical field of fan heat dissipation, in particular to an energy-saving industrial centrifugal fan capable of assisting heat dissipation of a motor. The energy-saving industrial centrifugal ventilator comprises a machine shell with an air inlet and an air outlet, a first impeller is rotationally arranged in the machine shell, and one end of the first impeller is coaxially connected with a motor arranged outside the machine shell. Gas is guided through the pressure intensity difference between the air inlet and the air outlet, cooling liquid is cooled in the process that external gas is sucked in, and the gas at the air outlet drives the cooling liquid to circularly flow through the double-turbine assembly in the flowing process. Thus, when the power of the motor is increased or decreased, the rotating speed of the first impeller changes correspondingly, so that the flow speed of gas in the suction pipe and the flow guide pipe is affected, circulation and heat exchange of cooling liquid are adjusted correspondingly, and then the heat dissipation balance of the motor is improved.

The invention relates to the field of resistive current monitoring and diagnosis of zinc oxide lightning arresters, and discloses a resistive current monitoring device and method of a zinc oxide lightning arrester and a fault diagnosis method. Comprising a zinc oxide arrester, and a first ultrahigh-frequency partial discharge sensor, a second ultrahigh-frequency partial discharge sensor, an alternating-current voltage source, a first metal shielding shell, a metal guide plate, a magnetic field detector, a plurality of impedance regulators, a second metal shielding shell, a first current sensor, a high-frequency partial discharge sensor and a second current sensor which are arranged on the zinc oxide arrester, the single-chip microcomputer is used for obtaining signals collected by the sensors to calculate resistive current of the zinc oxide lightning arrester and a degradation value of a valve plate of the lightning arrester. By utilizing the device and the method provided by the invention, the resistive current of the zinc oxide arrester can be monitored in real time without introducing a reference signal from a voltage transformer, and meanwhile, the on-site automatic diagnosis and evaluation of the deterioration degree of the valve plate in the arrester are realized by eliminating the current interference on the umbrella skirt edge surface of the arrester.

The invention discloses a remote sensing image segmentation method based on multi-scale wavelet transform and Mama. The method comprises the following four steps: firstly, carrying out preprocessing and division on an ISPRS Potsdam data set and a Vaihingen data set; then constructing a segmentation network, wherein the network comprises a local detail extraction branch, a spatial semantic extraction branch, a cross-branch feature fusion part and a decoder; training and optimizing the network by using the training set; and finally, performing segmentation reasoning on a test image by using the trained model. According to the method, the high-frequency detail extraction capability of the image is enhanced through multi-scale wavelet transform, the long-distance dependency relationship is modeled by using the visual state space block, and effective fusion of the features is realized through the double-branch fusion module, so that the feature extraction capability and the semantic segmentation precision are improved, and meanwhile, the training efficiency and the stability are optimized.

The utility model provides a pressure relief support assembly and a battery module, the pressure relief support assembly comprises: a pressure relief support, one side, facing a first direction, of the pressure relief support is provided with an accommodating groove and a pressure relief port, and the accommodating groove is used for installing a busbar; a material channel is formed in the protective cover, and the protective cover covers the pressure relief opening, so that the material channel is communicated with the pressure relief opening, and the protective cover isolates the pressure relief opening from the accommodating groove, and therefore, when the thermal runaway phenomenon occurs to the single battery, the pressure generated by the thermal runaway phenomenon is released through the pressure relief opening; when the battery module is in thermal runaway, thermal substances sprayed out of the pressure relief opening are discharged into the substance channel, and the thermal substances sprayed out of the pressure relief opening are prevented from being scattered on the busbar due to the isolation effect of the protective cover on the pressure relief opening and the accommodating groove, so that thermal runaway spreading and explosion of the battery module are avoided, and potential safety hazards are reduced.

The utility model relates to the technical field of cylindrical lithium batteries, in particular to a cylindrical lithium battery anode and cathode connecting device with a built-in BMS (Battery Management System) board, which comprises a lithium battery main body, a BMS component arranged in the lithium battery main body and a connecting device, the BMS assembly comprises a cover cap arranged at the top end of the conductive shell and a BMS mainboard arranged in the cover cap and used for detecting a roll core group, the roll core group comprises a positive roll core and a negative roll core which are alternately wound, a positive tab is arranged at one end, close to the BMS mainboard, of the positive roll core, a negative tab is arranged at one end, close to the BMS mainboard, of the negative roll core, and the positive tab is connected with the negative tab. The connecting device comprises a first conductive terminal of which one end is connected with the BMS mainboard and the other end is connected with the positive tab, and a second conductive terminal of which one end is connected with the BMS mainboard and the other end is connected with the negative tab. According to the utility model, the positive and negative tabs can be directly connected with the BMS mainboard, and the real-time monitoring of the battery state by the BMS assembly is ensured.

The invention discloses a movable transformer with an anti-explosion protection mechanism, and belongs to the technical field of transformers, and the movable transformer with the anti-explosion protection mechanism comprises a transformer, a heat dissipation net groove, two fixing frames, two sponge pieces, a heat dissipation mechanism, a water storage mechanism, two groups of liquid spraying mechanisms and a linkage mechanism. By arranging the heat dissipation net groove, the two sponge pieces, the heat dissipation mechanism, the water storage mechanism, the two liquid spraying mechanisms and the linkage mechanism, through operation of the heat dissipation mechanism, the flowing speed of air in the transformer and air outside the transformer can be increased, and the temperature in the transformer is effectively reduced; and water in the water storage mechanism is sprayed to the surface of the sponge sheet through the liquid spraying mechanism, the heat dissipation effect is further enhanced by utilizing the principle that heat is taken away through water evaporation, stable operation of the transformer is guaranteed, and the service life of the transformer is prolonged. And the sponge sheet is in contact with the surface of the transformer, so that a certain heat insulation effect is achieved, and the direct heating area of the transformer is reduced.

The invention relates to the technical field of lithium battery recovery, and discloses an explosion-proof crushing device for lithium battery recovery based on gas circulation, the explosion-proof crushing device comprises a crushing main body, a crushing device and an inert gas circulation conveying system, the crushing main body is provided with a feeding mechanism and a discharging mechanism, and the crushing device divides the crushing main body into two parts; the gas inlet end of the inert gas circulating conveying system communicates with the crushing body through a plurality of branch pipes, the gas outlet end of the inert gas circulating conveying system communicates with the recycling part of the crushing body through a pipeline, the branch pipes extending into the dissipation part are connected with diffusion pipes fixed to an inner cavity of the crushing body, and a gas outlet channel is formed in the top of the crushing body. According to the device, stability of the concentration in inert gas circulation is achieved through the inert gas circulation system and the gas outlet channel capable of automatically exhausting gas, and meanwhile, the inert gas circulation system can also be matched with the diffusion pipe to gather waste gas at a source at the gas outlet channel; and the exhaust gas discharging speed is increased.

The utility model discloses a biogas purifying, absorbing and filtering device which comprises a filtering tank, a hydraulic cylinder is installed on the lower portion of the inner side of the filtering tank, a hydraulic rod is installed above the hydraulic cylinder, a movable plate is movably connected above the hydraulic rod, a filter element is installed above the movable plate, a partition plate is fixed above the filter element, and the partition plate is connected with the hydraulic cylinder. An air inlet pipe is installed on one side of the filtering tank, a first fixing disc is installed on one side of the air inlet pipe, and the outer side of the first fixing disc is sleeved with a hoop; according to the biogas purifying, absorbing and filtering device, the hoop, the sealing ring and the first bolt are arranged, the hoop is fixed to the outer side of the sealing ring through the first bolt in the using process of the device, the sealing ring seals the connecting position of the biogas inlet pipe, and biogas can be effectively prevented from leaking outwards; safety accidents such as poisoning can be caused by biogas leakage, safety hazards to workers are reduced, and biogas leakage is prevented so that production safety can be guaranteed.

The invention discloses a continuous detection system for a gas alarm in the technical field of gas detection, the system can be carried on an intelligent computer with a processor for use, a control end needs to be provided with a plurality of gas sensors, and the continuous detection system comprises a sensor unit and a control unit, the system is composed of high-sensitivity electrochemical and semiconductor sensors, and the multiple sensors can detect gas concentration changes as low as ppm level and are responsible for collecting and processing gas samples in real time so as to ensure that the system can accurately monitor and give an alarm; and a data processing unit. Compared with the prior art, the continuous detection system provided by the invention provides higher reliability and real-time performance for the gas alarm. Through an advanced sensor technology and intelligent data processing, quick response to harmful gas and accurate alarm are ensured. In addition, in combination with a renewable energy power supply design, the independence and the application range of the equipment are greatly improved, and the device is particularly suitable for being used in remote areas or areas with unstable electric power.

The present invention belongs to the technical field of battery maintenance, and discloses a new energy vehicle battery maintenance device, including a base, the upper surface of the base is provided with installation grooves at equal intervals, the front and rear sides of the bottom of the installation groove are symmetrically provided with card slots, the upper surface of the base is fixedly provided with a installation shell, the upper surface of the installation shell is provided with a plurality of guide grooves at equal intervals, the sides of the guide grooves are symmetrically provided with side grooves, and the middle of the front and rear side grooves are fixedly sleeved with electric heating plates. The mercury inside the telescopic sleeve is heated and expanded, so that the expanded mercury inside the telescopic sleeve pushes the telescopic end of the telescopic sleeve to move upward, and the telescopic end of the telescopic sleeve drives the heat-conducting plate to move upward and contact the heat dissipation plate through the electric plate. At this time, the heat dissipation plate dissipates heat to the battery through the sleeve column and the heat-conducting plate, thereby solving the problem of low charging and discharging efficiency and shortened life of the battery when the battery works in a high or low temperature environment.

The invention belongs to the field of hydrogen gas detection, and particularly relates to hydrogen gas leakage detection early warning equipment and a use method thereof.The hydrogen gas leakage detection early warning equipment comprises a base, the overlook face of the base is concave, the top of the base is fixedly connected with a supporting plate, one side of the supporting plate is fixedly connected with a top plate, and the bottom of the top plate is fixedly connected with a first gas inlet pipeline; the outer wall of the first air inlet pipeline is in sliding connection with a second air inlet pipeline; according to the hydrogen gas leakage detection and early warning equipment and the using method thereof, air near a hydrogen refueling station is pumped into the first gas inlet pipeline through the exhaust fan, detection is conducted through the hydrogen sensor, and when hydrogen leakage is detected, an alarm is given through the buzzer alarm; air exhausted by the first air inlet pipeline enters the cavity and is filtered through the palladium asbestos, hydrogen in the air is purified, the danger of explosion is prevented, meanwhile, the palladium asbestos absorbing the hydrogen becomes black, and a hydrogenation driver needs to drive away from the hydrogen refueling station in time when discovering that the palladium asbestos becomes black or the buzzer alarm gives an alarm.

The utility model discloses a safety device system for a furnace body of an induction melting furnace, which belongs to the technical field of furnace leakage monitoring of the induction melting furnace and comprises a furnace leakage alarm system, the furnace leakage alarm system comprises a stainless steel induction component mounted on the outer side of a furnace lining and a stainless steel detection component led out from the furnace lining and extending into the furnace, the stainless steel induction assembly and the stainless steel detection assembly are connected in series, and a power supply is connected in a series circuit. The system further comprises a cooling water monitoring system, and a quick cut-off valve is arranged on a water inlet pipeline of the cooling water monitoring system. The system further comprises a PLC control system, and the PLC control system is connected with the furnace leakage alarm system and controls opening and closing of the rapid cut-off valve. The safety device system for the furnace body of the induction melting furnace is used for monitoring the furnace lining in real time in the operation process of the induction melting furnace, water supply is stopped in time when abnormity occurs, and the safety of the furnace body is ensured.

The utility model discloses a battery and a battery module. The battery comprises a battery cell, a first collector plate and a pressure relief part, wherein the first collector plate is arranged on one side of the battery cell, the first collector plate comprises a connecting part and a convex part, the connecting part is connected with the battery cell, the convex part is arranged on the connecting part and protrudes in the direction away from the battery cell, and a buffer cavity is formed in the side, close to the battery cell, of the convex part. The pressure relief part is arranged on one side, far away from the battery cell, of the lug boss. According to the battery and the battery module, the problem of thermal runaway of the battery cell caused by battery cell expansion in the prior art is solved.

This invention discloses a plug-in board and adapter, associated electrical components, and an electric vehicle. The plug-in board includes an MCU circuit I, an adapter communication circuit, and a controller circuit. Some models also include a BMS battery management circuit, a vehicle electrical and electronic fuse circuit, a taillight control circuit, a communication line starting power supply circuit, a human-machine interaction circuit, and a battery communication circuit. The plug-in board is soldered to the controller's PCB circuit board via pins, or connected to the pins on the controller's PCB board via a socket. The plug-in board and the controller are housed in a single housing, saving space, material costs, and labor costs. The original controller's MCU chip can be improved to enhance controller performance and enable the application of bus control systems without modification, greatly simplifying the wiring harness and connectors throughout the vehicle.

The present invention relates to the field of solenoid valves, and specifically discloses an adjustable explosion-proof solenoid valve, including a connecting pipe, a valve seat is arranged in the connecting pipe, an electromagnetic component is arranged on the connecting pipe, a control component matched with the valve seat is arranged in the connecting pipe, and the electromagnetic component drives the control component to move so that the control component adjusts the opening of the valve seat. When the gas burns and explodes, the present invention can buffer the shock wave, reduce the impact force of the shock wave, form a sealed protective environment after the shock wave, and achieve a blocking effect on the gas. At the same time, the gas can be decompressed, and the device can be protected to avoid explosions in the connecting pipe due to the sealed high-pressure environment, improve the impact resistance of the device, and effectively avoid the phenomenon of chain explosions caused by the burning gas accompanying the shock wave, thereby improving the protection ability of the device and increasing the service life of the device.

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The utility model relates to the technical field of gas preparation, and discloses a gas standard substance preparation device which comprises a gas distribution main pipeline and a connecting pipe, a quick release assembly is arranged on the connecting pipe, a safety assembly is arranged on the gas distribution main pipeline, the quick release assembly comprises a mounting block, and an insertion block is movably connected in the mounting block. According to the gas standard substance preparation device, firstly, two pull rods on a mounting block are pulled outwards to the farthest end, a clamping block is straightened to the farthest end along with a sliding block, a spring is compressed, then an insertion block at the top of a gas storage bottle is inserted into a cavity in the mounting block till the top of a connecting base is attached to the bottom of the mounting block, the pull rods are loosened, and under the elastic force action of the spring, the gas storage bottle is fixed to the mounting block. When the gas storage cylinder needs to be disassembled, the pull rod is pulled outwards, the fixing effect of the clamping block on the inserting block is relieved, then the gas storage cylinder is pulled out downwards, quick disassembly can be completed, and the advantage that the gas storage cylinder is convenient to disassemble and assemble is achieved.

The utility model discloses a compartment type powder cleaning system with a fixed forming part, which is characterized in that a piston driving device drives a forming piston to lift in a forming cylinder, and a forming cylinder lifting driving device drives the forming cylinder to lift; the upper end of the forming cylinder can be inserted into an opening of a bottom plate of the forming chamber in a sealed mode and is connected with a working plane on the upper side of the bottom plate of the forming chamber in an aligned mode, the powder cleaning cylinder driving device drives the powder cleaning outer cylinder to ascend and descend, and the upper end face of the powder cleaning outer cylinder can make sealed contact with the lower side face of the bottom plate of the forming chamber. The lower portion of the forming cylinder and the lower portion of the powder cleaning outer cylinder can be aligned and connected with the upper end face of a forming piston after 3D printing is completed, a powder containing space with the upper end face of the forming cylinder and the upper end face of the forming piston as the bottom face can be formed in the powder cleaning outer cylinder, and the dust collector can suck away powder in the powder containing space through a powder suction opening in the side wall of the powder cleaning outer cylinder. According to the 3D printing device, the centering precision of the forming cylinder is guaranteed, and intelligent and automatic powder cleaning and piece taking of the 3D printing device are achieved.