256 results about "Nitrogen cylinder" patented technology

The invention relates to a multifunctional integrated liquid cooling plate testing machine which comprises a cabinet body, a testing inlet pipe and a testing outlet pipe which are used for being connected with a liquid cooling plate are arranged on the cabinet body, a pure water tank and a nitrogen cylinder are arranged in the cabinet body, a first liquid outlet and a first liquid return opening are formed in the pure water tank, the first liquid outlet is communicated with the testing inlet pipe through a first pipeline, and the first liquid return opening is communicated with the testing outlet pipe through a second pipeline. The first liquid return port is communicated with the test outlet pipe through a second pipeline, the first pipeline is provided with a variable frequency circulating pump, the nitrogen cylinder is communicated with a third pipeline, the third pipeline is connected with the first pipeline through a first stop valve, the first stop valve is communicated with a fourth pipeline, and the fourth pipeline is connected with the second pipeline through a first three-way valve. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are provided with a cleanliness testing assembly, a thermal resistance testing assembly and an air tightness testing assembly. The liquid cooling plate testing device has the effect of realizing integrated testing of the liquid cooling plate.

The invention belongs to the technical field of metal material and coating performance detection, and particularly relates to a high-pressure hydrogen permeation testing device and method.The testing device comprises a gas phase system and an electrochemical testing system, and the gas phase system comprises a high-pressure kettle, a hydrogen cylinder, a nitrogen cylinder and a vacuum treatment device; the autoclave is sealed and communicated with the hydrogen cylinder, the nitrogen cylinder and the vacuum treatment device; a first test port is formed in the upper part of the autoclave; the electrochemical testing system comprises an electrochemical workstation and an electrolytic tank; the electrolytic tank is connected to the upper part of the autoclave; the electrolytic tank is provided with a reference electrode and an auxiliary electrode, the lower part of the electrolytic tank is provided with a second test port, and the first test port and the second test port are connected with closed rubber rings and jointly clamp a sample to be tested through the closed rubber rings; the electrochemical workstation is electrically connected with the auxiliary electrode, the reference electrode and the to-be-tested sample, so that the service condition of the to-be-tested sample can be accurately simulated, the hydrogen permeation process in the actual working condition can be more truly reflected, and the accuracy of a hydrogen permeation test experiment is improved.

The invention provides sampling equipment for lithium ore flotation tailing recovery and a resource recovery method, and relates to the technical field of recovery sampling, the sampling equipment comprises a mounting frame, a movable sampling mechanism, an adjusting gear and an inerting protection mechanism; the movable sampling mechanism comprises a sliding rail, a movable seat, a rotating seat and a sampling cup, the movable seat is slidably connected with the sliding rail, the rotating seat is fixedly arranged at the top of the movable seat, the inner side of the rotating seat is rotatably connected with a rotating shaft, the front end of the rotating shaft is fixedly connected with the sampling cup, and the sampling cup is fixedly connected with the movable seat. And the rear end of the rotating shaft is fixedly connected with the adjusting gear. According to the scheme, nitrogen in the nitrogen cylinder is finally sprayed out through the hose and the spray head, a nitrogen curtain is formed at the sampling end of the sampling cup, amine substances in foam are prevented from being oxidized by air, the viscosity of a foam sample is prevented from being sharply reduced, and the accuracy and representativeness of foam viscosity detection data are improved; the use amount of the amine medicament can be adjusted in a targeted manner, and the polluted water body can be treated.

A device and method for preparing high-purity metals by vacuum distillation and bidirectional step condensation, the device comprising an atmosphere control device, a vacuum distillation device, a charging device, an intelligent control device, and an exhaust gas treatment device. The atmosphere control device comprises a nitrogen bottle and a control valve located above the bottle mouth for controlling the opening and closing of the nitrogen bottle. The vacuum distillation device comprises a vacuum distillation device and a vacuum pump connected to the vacuum distillation device via a pipeline. The charging device is located in the middle of the vacuum distillation device, and the intelligent control device is connected to the vacuum distillation device. The exhaust gas treatment device comprises an impurity removal device. The vacuum distillation device is provided with a plurality of heaters, which are arranged in parallel along the length direction of the charging device and the condensation zone on both sides of the vacuum distillation device. The present invention also includes a method for preparing high-purity metals using the device. The device of the present invention has a simple structure, is not restricted by the gravity field, is convenient for sampling, and has high impurity removal efficiency.

This invention relates to the field of fire door technology, specifically a smoke-blocking fire door, including a fire door frame, a fire door body mounted on the fire door frame via hinges, a door closer connected to the top of the fire door frame at the top, a handle mounted on the fire door body, and a smoke-blocking device mounted on the fire door body. The smoke-blocking device comprises a housing, a shaking device, a plate, a foam bottle, a nitrogen cylinder, pipes, a connector, and a metal tube. This invention injects foam between the fire door frame and the fire door body. The foam from the foam bottle is injected into the space between the fire door body and the fire door frame through the metal tube. The foam expands upon contact with air, filling and sealing the space between the fire door body and the fire door frame, preventing smoke from a fire from spreading upwards through the stairwell.

The invention discloses a shock absorber, a shock absorption method and a vehicle, and relates to the field of shock absorption devices. The shock absorber comprises an oil storage barrel. One end of the piston rod penetrates into the oil storage barrel from the open end of the oil storage barrel; the side wall of the piston rod and the opening of the oil storage barrel are sealed; an oil passing hole formed in the axial direction of the piston rod is formed in the piston rod; the main piston valve system is movably arranged in the oil storage barrel and divides the oil storage barrel into a first cavity and a second cavity, and the main piston valve system is fixedly connected with the end, located in the oil storage barrel, of the piston rod; one end of the nitrogen cylinder is connected with the end, away from the oil storage cylinder, of the piston rod through a connecting assembly. When the piston rod moves in the oil storage barrel in a reciprocating mode in the axial direction of the piston rod, part of oil in the oil storage barrel can be transferred between the first cavity and the second cavity through the main piston valve system, and the other part of oil in the oil storage barrel can be transferred between the first cavity and the nitrogen barrel through the oil hole. According to the shock absorber, the shock absorption method and the vehicle, the heat dissipation efficiency can be improved.

The invention discloses a lunar dust interference effect test platform suitable for a vacuum environment and a use method of the lunar dust interference effect test platform, and relates to the technical field of aerospace engineering ground simulation tests.The platform comprises a vacuum container system, a measuring system and a dustproof system; maintaining the normal-pressure and normal-temperature working state of the camera; the measurement system integrates a P IV camera, three high-speed cameras and a heat flow sensor, and realizes the multi-dimensional measurement of the moony dust excitation height / speed / impact range, the erosion pit three-dimensional reconstruction and the engine aerodynamic heat effect. The dustproof system adopts a high-transmittance acrylic dustproof cover and a vacuum gauge for differential pressure monitoring, so that lunar dust is prevented from polluting the heat sink, and the safety of the cover body is protected. The problems of pollution and single measurement of a vacuum system in the prior art are solved, multi-physical-quantity collaborative testing is achieved, key test data are provided for design of the lunar lander, and the method has engineering application value.

The invention discloses a nitrogen shock absorber and a shock absorption method thereof, and relates to the technical field of shock absorbers, the nitrogen shock absorber comprises an oil storage barrel, a piston rod, a lower connecting seat, an upper connecting seat, a central fixing pipe, a piston valve system assembly and a compression hydraulic buffer assembly; the piston rod is slidably connected with the oil reservoir; the lower connecting seat is fixed at one end of the piston rod; the upper connecting seat is mounted at one end of the oil storage cylinder, and a compression hydraulic buffer regulating valve system assembly, a compression high-low speed regulating valve system assembly and a nitrogen cylinder are mounted on the upper connecting seat; the center fixing pipe is fixed to the end, located in the oil storage barrel, of the piston rod. The piston valve system assembly is fixed to the outer wall of the center fixing pipe and divides the interior of the oil storage barrel into a recovery cavity and a compression cavity. The compression hydraulic buffering assembly comprises a hydraulic buffering rod, and the hydraulic buffering rod is communicated with the compression hydraulic buffering adjusting valve system assembly. The performance of the compression hydraulic buffering system is improved, the hydraulic buffering stroke is increased, and the purpose of progressive damping hydraulic buffering is achieved.

The present application relates to a kind of high temperature high pressure formation fluid containing large hole fracture plugging simulation device, including nitrogen bottle, liquid storage tank, simulation wellbore, heating insulation cover, back pressure valve and hole fracture isolation plate, there is inner cylinder in upper kettle body, there is simulation leakage layer in inner cylinder, upper kettle body and lower kettle body are connected by flange, hole fracture isolation plate is set between upper kettle body and lower kettle body, back pressure valve is set at the place close to hole fracture isolation plate of lower kettle body, heating insulation cover is set on the outer wall of upper kettle body and lower kettle body.The simulation method for high temperature high pressure formation fluid containing large hole fracture plugging using the above device, including: plugging slurry is discharged or passed through formation fluid and then enters simulation leakage layer;The plugging effect of conventional drilling fluid on small hole fracture leakage layer is judged by the pressure difference of upper kettle body and lower kettle body;The breakthrough pressure of sealing zone is obtained by the pressure difference between upper kettle body and lower kettle body after sealing zone is formed by solidified cementation type plugging slurry.The present application is in line with actual downhole, easy and fast to operate, provides platform and means for the plugging research of formation fluid containing large hole fracture leakage layer.

The invention discloses a nitrogen shock absorber and a design method of a connecting seat thereof, and relates to the technical field of connecting seats, the first end of a nitrogen cylinder module is connected with the first end of the connecting seat, the second end of the connecting seat is connected with the first end of a piston rod module, and a floating piston assembly is arranged in the nitrogen cylinder module; the position, corresponding to one side of the floating piston assembly, of the nitrogen cylinder module is used for storing nitrogen, the position, corresponding to the other side of the floating piston assembly, of the nitrogen cylinder module is used for introducing hydraulic oil, the first end of the piston rod module is used for being connected with a suspension, and the second end of the piston rod module extends into the oil storage cylinder module through the first end of the oil storage cylinder module. Hydraulic oil in the oil storage cylinder module can enter the nitrogen cylinder module through oil passing holes in the piston rod module and the connecting base, and the compression adjusting valve is installed on the connecting base and used for adjusting the flow resistance of the hydraulic oil passing through the oil passing holes. The damping device is simple in structure, good in damping performance and good in road condition adaptability.

This application relates to the field of fabric edge trimming technology, and in particular to a laser edge trimming device for printed fabrics. The device includes a worktable, a laser cutting device and a mounting plate mounted on top of the worktable. A cavity is provided in the middle of the mounting plate. The mounting plate is connected to a horizontal adjustment structure and a vertical adjustment structure. The horizontal adjustment structure is connected to the mounting plate, one end of the vertical adjustment structure is fixedly connected to the horizontal adjustment structure, and the other end of the vertical adjustment structure is connected to the laser cutting device. An air jet device is provided on one side of the mounting plate. The air jet device includes a nitrogen cylinder, an output pipe, and a high-pressure nozzle. The nitrogen cylinder is slidably connected to the mounting plate and is connected to the output pipe. The output pipe is connected to the high-pressure nozzle, which is located on one side of the laser cutting device. A dust collection device is provided on the other side of the mounting plate. The dust collection device includes a vacuum cleaner, a vacuum hose, and a vacuum hood. The vacuum hood is located on the other side of the laser cutting device and is connected to the vacuum hose. The vacuum hose is connected to the vacuum cleaner.

The utility model discloses a nitrogen cylinder transportation support, and relates to the technical field of nitrogen cylinder transportation. The support comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a support body, buffering assemblies are symmetrically arranged in the support body, fixing assemblies are jointly arranged on the two sides and the interior of the support body, each fixing assembly comprises symmetrically-distributed guide seats, and the guide seats are fixedly installed on the two sides of the support body. A traditional complex bolt connection mode is replaced with the fixing assembly in a magnetic attraction connection mode, when the nitrogen cylinder is assembled and disassembled, the nitrogen cylinder can be rapidly fixed and disassembled only by utilizing the magnetic attraction principle, the buffering assembly is arranged, and through the synergistic effect of a sponge buffering pad, a foamed aluminum buffering layer and a rubber buffering pad, the buffering effect of the buffering assembly is greatly improved. Vibration and impact force in the transportation process can be effectively absorbed, direct collision to the nitrogen cylinders is reduced, and therefore the service life and safety of the nitrogen cylinders are guaranteed.

The present application relates to the field of maintenance, in particular to a main steam isolation valve pressure relief valve automatic calibration device and calibration method. The device comprises: the upper cylinder of the MSIV simulation body is connected with a nitrogen cylinder; the oil tank is connected to the oil inlet of the MSIV simulation body through an oil inlet pipeline, and the oil return outlet of the MSIV simulation body is connected to the oil tank through an oil return pipeline; the inlet electromagnetic valve and the pneumatic pump are in an integrated structure, which is arranged on the oil inlet pipeline, and the pneumatic pump delivers the high-pressure fire-resistant oil in the oil tank to the MSIV simulation body; the inlet electromagnetic valve controls the start and stop of the pneumatic pump; the lower oil cylinder of the MSIV simulation body returns the fire-resistant oil to the oil tank through a flow control valve; two pressure relief valves are arranged in series on the oil return pipeline, and each pressure relief valve is controlled by a quick closing electromagnetic valve; the action of the pressure relief valve is measured by a displacement measuring element; a first pressure measuring element is arranged at the oil return outlet of the MSIV simulation body, and a second pressure measuring element is arranged on the oil return pipeline arranged between the two pressure relief valves. A control system is used to control the actuator to automatically perform function test, and to perform system monitoring, equipment debugging and data playback, and to alarm for the function test that does not pass. The present application simulates the actual operation condition of the pressure relief valve during the action of the MSIV, tests the comprehensive performance of the MSIV pressure relief valve, and then guides the subsequent maintenance direction of the pressure relief valve, finally verifies whether the performance of the pressure relief valve after maintenance is qualified, effectively avoids blind repair and wrong repair; and can also check the new spare parts to confirm their usability.

The invention discloses an underground distributed optical fiber air bag coupling recovery system which comprises an air bag and an inflation control system connected with the air bag. The inflation control system comprises an electromagnetic valve, a high-pressure nitrogen cylinder and a pressurizing inflation pump, the output end of the high-pressure nitrogen cylinder is connected with one end of a main air pipe, the surface of the main air pipe is provided with a plurality of mounting holes and connected with one ends of a plurality of inflation pipes, and the other ends of the inflation pipes are used for being connected with air inlets and air outlets of the air bags; an electromagnetic valve is mounted on each gas filling pipe; the other end of the main air pipe is connected with the input end of the vacuum pump through another corresponding electromagnetic valve. Coupling of the optical cable and the well wall is achieved through inflation and deflation of the air bag, and higher efficiency is achieved; the method adapts to the environment, can resist the high pressure of 10 MPa and the temperature of-30 DEG C to 120 DEG C, and is suitable for the complex underground environment; the device is convenient to operate and supports independent control of a single air bag, and the recovery efficiency is improved by 80% or above.

The invention relates to an in-situ and ex-situ catalytic pyrolysis device with a movable heating area and a pyrolysis method. The in-situ and ex-situ catalytic pyrolysis device comprises a rack; the reaction tube is axially and horizontally arranged on the rack; the left end of the reaction tube is communicated with a nitrogen cylinder through a rotary joint, a flow meter and a pressure reducing valve; the first end of the three-way pipe is connected with the right end of the reaction pipe through a rotary joint, the second end of the three-way pipe is connected in series with the first condenser and the first gas storage bag through a first stop valve, and the third end of the three-way pipe is connected in series with the second condenser and the second gas storage bag through a second stop valve; the tubular heating furnace is horizontally arranged on the rack in a sliding manner along the axial direction of the reaction tube, and a first heating area and a second heating area which are different in temperature are arranged in the tubular heating furnace; according to the device, on the basis that the in-situ catalytic reaction and the ex-situ catalytic reaction are carried out in the same device, the influence of the heating rate on the rapid pyrolysis of the raw materials is avoided, the full contact between different raw materials in the co-pyrolysis process and the maximum production of target products are ensured, and a catalyst evaluation function is also considered.

The invention relates to the technical field of seawater electrolysis hydrogen production, in particular to a closed water electrolysis hydrogen production system and method applied to an ocean scene. The device comprises a sealed shell, and an electrolytic hydrogen production pipeline, an oxygen side separation pipeline, a hydrogen side separation pipeline, an electrolytic cooling pipeline and a hydrogen elimination and dehumidification pipeline which are arranged in the sealed shell, the hydrogen elimination and dehumidification pipeline comprises a fan and a hydrogen elimination device which are located between the oxygen side separation pipeline and the hydrogen side separation pipeline, one end of the hydrogen elimination device is connected with an oxygen discharge port through a pipeline, and the other end of the hydrogen elimination device is connected with a nitrogen cylinder through an electromagnetic valve; the dehydrogenation and dehumidification pipeline further comprises a hydrogen concentration alarm and an oxygen concentration alarm. The device integrates multiple pipelines of electrolytic hydrogen production, oxygen / hydrogen side separation, electrolytic cooling, hydrogen elimination and dehumidification and the like; all the pipelines work cooperatively, efficient gas-liquid separation, precise temperature control and safe hydrogen elimination and dehumidification are achieved, a complete and efficient hydrogen production system is formed, the system can stably adapt to the complex marine environment, and it is guaranteed that the hydrogen production process is safely, continuously and stably conducted.

The present application relates to the technical field of activated carbon surface modification, and particularly relates to a method for modifying coconut shell activated carbon by pressure impregnation, which has the following steps: step one: activated carbon is added to deionized water and heated and stirred, then filtered, and the sample is collected and dried to obtain activated carbon AC; step two: the sample is placed in a pressure impregnation device and connected to a nitrogen cylinder; step three: the pressure impregnation device is treated with nitrogen gas, and the treatment is repeated 3-5 times; step four: an impregnation liquid is introduced and impregnated by nitrogen pressure. The method for modifying activated carbon by pressure impregnation makes the impregnation liquid enter the interior of the activated carbon pore diameter, and improves the impregnation efficiency and loading capacity. The modified coconut shell activated carbon prepared by the method has better dispersion and distribution depth of components, and effectively utilizes the specific surface area of the activated carbon.

The utility model discloses a nitrogen balance cylinder system, and particularly relates to the technical field of nitrogen balance cylinders, the nitrogen balance cylinder system comprises a supporting plate, two nitrogen cylinders, two balance oil cylinders and an oil distribution block are installed outside the supporting plate, and the two nitrogen cylinders are distributed at the top of the supporting plate at intervals. Through the design of the two groups of nitrogen cylinders, more stable and uniform air pressure output can be provided, and when the pressure of one group of nitrogen cylinders is reduced, the pressure of the other group of nitrogen cylinders can be quickly supplemented, so that the air pressure stability of the whole system is ensured, and the two groups of nitrogen cylinders can simultaneously work under the condition that the pressure needs to be quickly adjusted and balanced; according to the invention, the two groups of nitrogen cylinders are arranged to provide higher response speed, the configuration of the two groups of nitrogen cylinders increases the redundancy of the system, and even if one group breaks down, the other group can still work, so that the pressure stability can be increased, the response speed can be improved, the system stability can be enhanced, the pressure distribution can be optimized, and the service life of equipment can be prolonged.

The utility model discloses a dairy product membrane sterilization equipment, including membrane sterilization equipment and skimmed milk jar, emulsion delivery pipeline communicates with skimmed milk jar, the input end of skimmed milk jar still has nitrogen gas pipeline, and the output of skimmed milk jar communicates through material valve and separation jar, and the top of separation jar is connected with balance pipeline, and balance pipeline communicates with the top and bottom of nitrogen cylinder through two branch pipes respectively, and the material of separation jar output enters membrane sterilization equipment through unloading valve. The dairy product membrane sterilization equipment, in the process of exhausting material, by first nitrogen gas, the material in pipeline is pushed out, balance the pressure in skimmed milk jar simultaneously, make its smooth, the application sets up separation jar in the process of vacuumizing, and the gas in separation jar is extracted, not only can reduce the air content in separation jar emulsion, but also can detect whether pipeline exists sealing problem.

The invention discloses a cleaning assembly and a single crystal growth furnace, and relates to the technical field of single crystal furnace cleaning.The cleaning assembly comprises an operation box, a plurality of sliding blocks are movably connected to the side face of the operation box in an inserted mode, the ends, away from the operation box, of the sliding blocks are connected with adsorption boxes, and a plurality of sets of bristles are distributed on the side walls of the adsorption boxes; a plurality of sets of adsorption holes are formed in the side, close to the bristles, of the adsorption box, the adsorption holes and the bristles are alternately arranged, a plurality of ion blower guns are connected to the side face of the operation box, and an air inlet of each ion blower gun is connected with a nitrogen cylinder. The device has the advantages that the ion blower gun works in the sweeping process, ions are accurately blown to the surface of an object with static electricity through stable airflow formed by ionized gas, the static electricity is removed, the ion blower gun is used for neutralizing the static electricity, the bristles are used for physical sweeping, and the dust collector is used for immediate suction. And the dust removal effect is enhanced.

The utility model provides high-purity aluminum oxide mixing and processing equipment, and belongs to the technical field of aluminum oxide. The high-purity aluminum oxide mixing processing equipment is characterized by comprising a reaction kettle; the motor is fixedly connected to the upper end of the reaction kettle; the rotating rod is fixedly connected to an output shaft of the motor; the stirring fan blades are fixedly connected to the circumferential surface of the rotating rod; the gas collecting box is fixedly connected to the circumferential surface of the reaction kettle; hydrogen generated during high-temperature reaction of aluminum oxide is collected into the gas collecting box through the first gas pipe by virtue of suction force of the suction fan, then the nitrogen cylinder is opened, and nitrogen is injected into the gas collecting box through the second gas pipe, so that the hydrogen is diluted, the explosion condition caused by excessive hydrogen content is prevented, and the safety of a working environment is improved; and the explosion or fire risk caused by hydrogen leakage is reduced.

The quantitative sugar adding device comprises a supporting frame, a machine shell is arranged on the supporting frame, the machine shell is fixedly connected with conveying assemblies which are symmetrically arranged, and a sugar adding assembly is arranged on the inner wall, close to the conveying assemblies, of the machine shell; the sugar adding assembly comprises a spraying pipe fixedly connected with the machine shell, a spraying opening is formed in the spraying pipe, the spraying pipe is communicated with a gas conveying pipe, the gas conveying pipe is communicated with a heating pipe, and the end, away from the gas conveying pipe, of the heating pipe is communicated with a nitrogen cylinder. According to the device, the sugar adding assembly is arranged, food-grade nitrogen is adopted for driving, after heating, white granulated sugar is sprayed on the dried fruits, and white granulated sugar particles are melted in a small range, so that the white granulated sugar can be embedded into the dried fruits under the driving of nitrogen, can be adhered to the dried fruits and is not weak to fall off; the specific heat capacity of nitrogen is low, so that the dried fruits cannot be obviously influenced.

The utility model provides an automatic alarm and automatic carbon dioxide fire extinguishing device for a hot-dip galvanizing machine head, and relates to the technical field of hot-dip galvanizing equipment. The automatic alarming and carbon dioxide automatic fire extinguishing device for the hot-dip galvanizing machine head comprises the hot-dip galvanizing machine head, a fire extinguishing mechanism and an automatic control mechanism, the hot-dip galvanizing machine head comprises a machine head sealing cover, a zinc throwing frame tightening device and a zinc throwing frame; the automatic control part comprises a monitoring probe, a control part, a nitrogen cylinder, a gas electromagnetic valve and a release valve; the monitoring probe is installed in the machine head sealing cover and electrically connected with the control piece, and the gas electromagnetic valve is connected with the control piece and the nitrogen cylinder; the control piece is electrically connected with a buzzer alarm and an alarm lamp. According to the automatic alarm and carbon dioxide fire extinguishing device for the hot-dip galvanizing machine head, the technical problems that the interior of a closed machine head of an existing hot-dip galvanizing zinc pot is prone to being on fire, fire is not prone to being extinguished, large economic losses are prone to being caused, and the production recovery time is long are solved.

The utility model relates to the technical field of hazardous waste treatment, and discloses a hazardous waste crusher spiral conveying nitrogen charging protection device which comprises a nitrogen charging protection mechanism and a protection component arranged on one side of the nitrogen charging protection mechanism, the nitrogen charging protection mechanism comprises a nitrogen cylinder A and a stop valve installed at the outlet end of the nitrogen cylinder A, a conveying pipe is installed at one end of the stop valve, and a nitrogen discharging pipe is installed at the other end of the nitrogen cylinder A; a supporting rod is installed on one side of the conveying pipe, a check valve is installed at one end of the conveying pipe, the conveying pipe is installed at one end of the check valve, a safety valve is installed on one side of the conveying pipe, a connecting pipe A is installed at one end of the safety valve, and a stop valve is installed at the middle end of the connecting pipe A; four groups of nitrogen cylinders A are used for charging nitrogen into the sealed cabin, the crushing cabin, the rear section of the spiral pipeline below the lower flashboard and the top of the middle section of the spiral pipeline respectively, one group of nitrogen cylinders B is used for charging nitrogen into the side part of the front section, and the whole spiral pipeline is under nitrogen protection, so that waste in a material pit or the front spiral conveying section is prevented from catching fire; therefore, the flame returns to the whole spiral pipeline.

The invention relates to the technical field of carrier rocket storage tanks, and discloses a carrier rocket storage tank liquid nitrogen hydraulic test system which comprises a common-bottom storage tank, an upper tank nitrogen pipeline, a lower tank nitrogen pipeline, an upper tank liquid nitrogen pipeline, a lower tank liquid nitrogen pipeline, an upper tank pressure difference pipeline, a lower tank pressure difference pipeline, a nitrogen cylinder group, a liquid nitrogen tank car and an automatic pressure relief pipeline. The pressure of the upper box and the lower box of the common-bottom storage box can be accurately controlled and dynamically adjusted, pressure difference control and redundancy safety measures are taken, the common-bottom storage box is mainly composed of the upper box, the lower box, a tunnel pipe, a common bottom and the like, an upper corrugated pipe is fixedly connected to the upper portion of the upper box, and the technical blank of automatic tests in the field is filled. The system can normally work at an extremely low temperature (liquid nitrogen-196 DEG C), accurately measures the hydraulic performance of the storage tank in a liquid nitrogen medium, provides powerful technical support for development of rocket storage tanks, has the advantages of simple structure, convenience in operation and accurate measurement, and can be widely applied to hydraulic tests of carrier rocket storage tanks.

The utility model belongs to the technical field of insulating oil detection, and discloses an insulating oil dielectric strength testing device which comprises a rack and a detection assembly arranged in the rack, and the detection assembly comprises a sealing vessel used for containing insulating oil and a detection unit used for dielectric strength detection; the motor is arranged on the rack; the clamping arm is used for clamping a vessel, and the clamping arm is fixedly connected with the output end of the motor; the air inlet valve is communicated with the vessel through a pipeline; the exhaust valve is communicated with the vessel through a pipeline; the nitrogen cylinder is communicated with the air inlet valve through a pipeline; according to the scheme, insulating oil is introduced into the vessel in an inclined mode, air in the vessel is replaced, the oxidation influence of oxygen and moisture on oil quality is reduced, and therefore abnormal discharge and data deviation caused by bubbles are reduced; the utility model solves the problem that the existing dielectric strength vessel is easy to cause bubbles to be mixed into the insulating oil.

The utility model relates to the technical field of explosive explosion heat testing, and particularly discloses an explosion heat bomb gas replacement system which comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a pressure sensor, a nitrogen cylinder, an exhaust valve, a vacuum pump and a controller. The air outlet end of the second solenoid valve is connected with the vacuum pump through a pipeline. According to the utility model, the ultraviolet light catalytic reactor and the titanium dioxide photocatalyst are utilized to decompose combustible gas or harmful impurities; a filter is used for filtering gas exhausted from the explosion heat bomb, solid particles on the gas are intercepted, after gas replacement is finished, a sixth electromagnetic valve and a fifth electromagnetic valve are opened, a gas adding pump and a gas extracting pump are started at the same time, gas generated by the gas adding pump blows up the solid particles attached to the top and the bottom of a filter plate, and the solid particles on the gas are removed. And blown solid particles are sucked away by using the sucking pump, so that the cleanliness of the interior of the filter is improved.

The invention discloses an efficient fire suppression compressed inert gas foam fire extinguishing system which comprises a nitrogen cylinder set, a control cabinet, a foam liquid tank, a bottom plate, a water conveying pipe network, a nitrogen conveying pipe network and a foam liquid conveying pipe network, the nitrogen cylinder set conveys high-pressure nitrogen through the nitrogen conveying pipe network, and the foam liquid tank outputs foam liquid through the foam liquid conveying pipe network. The water conveying pipe network outputs water through the water conveying pipe network, and foam liquid output by the foam liquid conveying pipe network and the water output by the water conveying pipe network are mixed, then mixed with high-pressure nitrogen conveyed by the nitrogen conveying pipe network again and discharged through the mixing output pipe. The device has the functions of large flow and dynamic pressure balance and regulation, the nitrogen cylinder set is adopted for gas supply instead of conventional air compressor gas supply, nitrogen is inert gas, the better fire extinguishing effect is achieved, and the device is integrally arranged, compact in overall structure and convenient to carry and use.

The utility model discloses a freezing cut-off device and an inspection device thereof, the freezing cut-off device is used for cut-off of a pipeline, the freezing cut-off device comprises a liquid nitrogen adding mechanism and a freezing cut-off cavity, the freezing cut-off cavity is arranged on the pipeline in a sleeved mode, and the freezing cut-off cavity comprises a heat exchange cavity, a feed liquid pipe, a liquid nitrogen inlet, a liquid nitrogen outlet, a temperature detection assembly and a heat preservation layer. A liquid nitrogen adding mechanism is arranged on the upstream of the liquid nitrogen inlet and comprises a liquid nitrogen inlet pipe, a liquid nitrogen filling barrel, a pressurizing pipe I and a nitrogen cylinder, the liquid nitrogen inlet pipe is connected to the liquid nitrogen inlet, the liquid nitrogen filling barrel used for containing liquid nitrogen is arranged on the upstream of the liquid nitrogen inlet pipe, and the pressurizing pipe I used for pressurizing the liquid nitrogen filling barrel is arranged on the liquid nitrogen filling barrel; the upstream of the pressurizing pipe I is connected with a nitrogen cylinder. According to the freezing cut-off device, the problems that liquid nitrogen is not easy to add and cannot be continuously supplied are solved, the freezing effect on feed liquid is ensured, and meanwhile, an inspection and detection device is used for more conveniently detecting the freezing effect of the freezing cut-off device on different pipelines.

The invention relates to the technical field of electrical equipment humidity detection, in particular to an electrical equipment dehumidification device and method with an air chamber humidity detection.The electrical equipment dehumidification device comprises an air chamber, a recycling and purifying unit, an air storage tank, online detection equipment, a vaporizer, a vacuum pump and a filling unit, and the recycling and purifying unit comprises a filter, a recycling compressor and a vacuum compressor; the filling unit comprises a nitrogen steel cylinder and a sulfur hexafluoride filling steel cylinder, the device further comprises a PLC (Programmable Logic Controller), and all the devices are connected with the PLC; and after the sulfur hexafluoride in the gas chamber is automatically recovered through the PLC, the gas chamber is subjected to vacuumizing, nitrogen filling replacement and emptying operation, and then the gas chamber is filled with the sulfur hexafluoride. According to the invention, the gas in the gas chamber of the high-voltage electrical equipment is cyclically treated by adopting a unique purification treatment mode, impurities such as micro water, decomposition product gas and dust particles in the gas can be treated at the same time, and the recycled gas can be recycled after being purified without replacing new gas.