172 results about "Nitrogen cylinder" patented technology

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 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 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 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.

This utility model belongs to the field of fire extinguishing and protection devices, specifically a nitrogen fire extinguishing and protection device for an oil-immersed transformer. It includes a base, on the top of which a transformer body is fixedly mounted; an oil conservator is fixedly mounted on one side of the transformer body, and the transformer body and the oil conservator are connected by a pipe; a housing is fixedly mounted on the top of the base; a nitrogen cylinder is housed inside the housing; a main pipe is connected to the top of the nitrogen cylinder and surrounds the outside of the transformer body; multiple branch pipes are connected inside the main pipe, and these branch pipes penetrate the transformer body; an oil drain pipe is connected to one side of the transformer body; through the combined action of a turbine and stirring blades, the oil inside the transformer body is stirred by the multiple stirring blades to improve the oil's fluidity, thereby enhancing the cooling effect of nitrogen on the oil.

The invention discloses a vibration damper and a vibration reduction method thereof.The vibration damper comprises a first connector, a cylinder body, a piston rod, a nitrogen cylinder, a damper rebound valve, a damping cushion valve, a flow regulating valve, a piston sleeve, an end cover and a second connector, the first connector is in threaded connection with the cylinder body, and the side face of the first connector is in threaded connection with the nitrogen cylinder and the flow regulating valve; the end cover is fixedly installed at the other end of the cylinder body, the damper rebound valve is arranged in the cylinder body in a sliding mode, the piston rod is coaxially and fixedly installed in the middle of the damper rebound valve, the piston rod penetrates through the end cover and is connected with the second connector, the damping cushion valve is coaxially arranged on the outer side of the piston rod in a sleeved mode, and the piston sleeve is fixed to the inner side of the bottom end of the cylinder body. A base is arranged outside the second connector, a clamp spring seat is arranged outside the cylinder body, and an outer spring is arranged between the base and the clamp spring seat. Damping force is adjusted by adjusting the flowing speed of the damping medium through the flow adjusting valve, the piston sleeve and the damping cushion valve form a cushion cavity, rigid contact of components can be avoided, and damping stability is improved.

The invention provides an underwater lithium ion power battery toxic and harmful gas treatment system and method.The system comprises an inert gas filling system, an oxygen elimination and disinfection system and an inerting system control system, the inert gas filling system comprises a nitrogen cylinder and an inert gas filling pipeline, and the inert gas filling pipeline is communicated with the nitrogen cylinder and a storage battery chamber; nitrogen is conveyed to the storage battery chamber; the oxygen-eliminating and disinfecting system comprises an oxygen-eliminating and disinfecting pipeline, and two ends of the oxygen-eliminating and disinfecting pipeline are respectively communicated with the storage battery chamber to form closed circulation; the inerting system control system controls on-off and flow of an inert gas filling pipeline and controls starting and stopping of an oxygen elimination and disinfection program, the oxygen concentration can be controlled, harmful and toxic gas can be removed in time, and explosion accidents caused by gas leakage due to thermal runaway in a storage battery chamber are avoided.

The utility model discloses an annealing device for motor stator silicon steel sheet production, including annealing furnace body, the back surface fixed mounting of annealing furnace body has the nitrogen cylinder, the gas -out end fixed communication of nitrogen cylinder has the intake pipe, the one end of intake pipe is away from nitrogen cylinder and extends to the inside of annealing furnace body and is passed through annealing furnace body. The device can extract the gas in the annealing furnace body through the setting of high temperature -resistant centrifugal fan, and the cooperation with the air extraction pipe and the exhaust pipe, and then can send the gas back to the annealing furnace body, realize the circulation flow of the gas in the annealing furnace body, ensure that the silicon steel sheet is heated evenly, utilize the setting of nitrogen cylinder, and the cooperation of intake pipe, pressure valve and rotor flowmeter, so that nitrogen can enter the annealing furnace body, and the intake pressure is adjusted and the intake flow is monitored, the air in the annealing furnace body is replaced by nitrogen, the annealing environment without oxygen is formed, and the oxidation condition of silicon steel sheet is prevented.

The invention provides a carrier liquid treatment device with a multi-supporting-table structure, and belongs to the technical field of liquid adsorption.The carrier liquid treatment device comprises a nitrogen charging mechanism and a vacuumizing mechanism, the nitrogen charging mechanism comprises a first supporting table, a barrel inserting pump is installed in the first supporting table, and a nitrogen cylinder is installed at the top of the first supporting table; the barrel inserting pump is communicated with a nitrogen cylinder through a pressure reducing valve and an air source switch matched pipeline, the nitrogen cylinder is communicated with a pressure total meter through a discharging valve and a first valve, a vacuum pump is installed in the second supporting table, second valves are installed at the two air inlet ends of the vacuum pump, and the second valves are matched with a third valve through pipelines to be communicated with the pressure total meter. And the main pressure gauge is also connected with a mixer through a main pipe. According to the device, the mixing and rotating cylinder can be vacuumized firstly, then liquid is pressed into the mixing and rotating cylinder through nitrogen, the carrier adsorbs the liquid under the air isolation (nitrogen protection) environment, the liquid is evenly mixed, the function of effectively isolating air and adsorbing the liquid can be achieved, and the device has the advantages of being high in stability, convenient to operate and the like.

The utility model discloses a nitrogen filling device which is characterized in that a gas cylinder support, a fixing part, two gas cylinder fixing assemblies, a filling ejector pin and a filling nozzle are arranged in a matched manner, when nitrogen filling is needed, a nitrogen cylinder is placed on the gas cylinder support, a gas cylinder opening of the nitrogen cylinder is contained in the fixing part, and the nitrogen cylinder is fixed by the gas cylinder fixing assemblies; one end of the inflation nozzle is connected with a container needing nitrogen inflation or nitrogen inflation equipment, the inflation ejector pin ejects the air valve at the opening of the air bottle, nitrogen inflation work can be carried out, the nitrogen bottle is fixed, so that the nitrogen bottle cannot move easily even if the nitrogen bottle is interfered by external force or natural force, and smooth nitrogen inflation is guaranteed.

The invention belongs to the technical field of biological sample experiments, and particularly relates to a synchrotron radiation infrared spectrum miniature vacuum device for biological sample experiments, which comprises a vacuumizing mechanism and a sealing cover, the vacuumizing mechanism comprises a tray, a sealing box, a support pad, a gas pipe, a miniature nitrogen cylinder, a gas flow controller, a miniature vacuum pump and a control valve, a sealing box is arranged at the top of the tray, a supporting pad is arranged at the bottom of an inner cavity of the sealing box, the left side and the right side of the sealing box are communicated with air pipes, and the outer end of the air pipe on the right side is connected with a miniature nitrogen cylinder. Or the sealing box is slowly filled with the nitrogen in the micro nitrogen cylinder, so that the sealing box is filled with the nitrogen, the synchrotron radiation infrared spectrum test can be conveniently carried out, result bias is avoided, a treatment mode can be selected according to requirements, and the application range is expanded.

The utility model discloses a protection mechanism for reducing the return stroke friction force of a slotting tool of a mechanism. The protection mechanism comprises a sliding block end shaft seat, a first-stage connecting rod, a second-stage connecting rod, a fixed end shaft seat, an elastic lifting pin, a first nitrogen cylinder and a connecting shaft, wherein the fixed end shaft seat is fixedly connected with the lower die body, one end of the fixed end shaft seat is hinged to one end of the second-stage connecting rod, the other end of the second-stage connecting rod is hinged to one end of the first-stage connecting rod, the other end of the first-stage connecting rod is hinged to one end of the sliding block end shaft seat, and the sliding block end shaft seat is connected with the pulley mechanism and moves in the horizontal direction; the lower dead center position of the protection mechanism is 0.5 mm below the horizontal line of the central shaft, and the first-stage connecting rod and the second-stage connecting rod form an included angle of a preset angle at the upper dead center position; the elastic lifting pin is installed on the lower die base, and the advanced nitrogen cylinder is installed on the floating slotting tool and moves along with the floating slotting tool. The problems that the slotting tool of the mechanism is abraded and the floating slotting tool is blocked in the return stroke can be effectively solved.

The utility model discloses a spare gas source device for a bubbling gun, which relates to the technical field of bubbling guns and comprises a base, a plurality of placing grooves are arranged on one side of the top end of the base, a plurality of fixing components are arranged in the placing grooves, nitrogen cylinders are arranged at the tops of the fixing components, and the nitrogen cylinders are fixed by the fixing components; one side of the top of each nitrogen cylinder is connected with a metal hose, the end of each metal hose is connected with a busbar, and the end of one side of each busbar is connected with a header pipe pressure regulating valve. The nitrogen cylinder fixing device is reasonable and reliable in structure and simple to operate, and can be used for stabilizing and preventing inclination of the nitrogen cylinder according to the gravity of the nitrogen cylinder, so that the nitrogen cylinder is better protected in the working process, and the situation that the nitrogen cylinder is dangerous due to external collision and gas supply of a standby gas source is affected is avoided.

The utility model relates to the technical field of nitrogen making equipment, in particular to a nitrogen making device special for an integrated retarder. The nitrogen generation module is connected with the air compressor through a pipeline; the pressure multiplier is connected with the nitrogen generation module through a pipeline; the first electromagnetic valve is arranged on a pipeline between the pressure multiplier and the nitrogen generation module; the second electromagnetic valve is arranged on a pipeline between the pressure multiplier and the first electromagnetic valve; and the first storage tank is connected with the pressure multiplier through a pipeline. Ambient air is directly prepared into nitrogen through the air compressor and the nitrogen generation module, then the nitrogen pressure is increased to the range needed by maintenance through the pressure multiplier, and the nitrogen generation device is simple in overall structure, suitable for various retarder maintenance work area environments in a railway station area, capable of stably running for a long time and high in practicability. The unfavorable factors of carrying, purchasing, managing and the like of the original nitrogen cylinder pressure container are solved, the nitrogen is used and taken at any time according to operation requirements, and the operation efficiency is improved.

The invention discloses an on-line monitoring gas standard system for gas dissolved in oil, which comprises a shell (1), a display (2) is arranged at the top of the shell (1), a power supply module (3) and an industrial personal computer (4) are arranged in the shell (1), a data processing system is arranged in the industrial personal computer (4), the industrial personal computer (4) is electrically connected with the display (2), and the display (2) is electrically connected with the data processing system. The shell (1) is provided with n1 standard gas connectors, a nitrogen connector and a standby connector, each standard gas connector is connected with a standard gas cylinder (5), each nitrogen connector is connected with a nitrogen cylinder (6), the standard gas cylinders (5) and the nitrogen cylinders (6) are communicated with a first multi-way valve (7) through pipelines connected to the connectors, the first multi-way valve (7) is connected with a second multi-way valve (9) through a connecting pipeline (8), and the second multi-way valve (9) is connected with the standby connector. The second multi-way valve (9) is connected with n2 quantitative units (10), and an outlet of each quantitative unit (10) is communicated with an inlet of a measurement and control unit (11) through a pipeline.

The utility model relates to the technical field of numerical control planer type milling machines, in particular to a nitrogen balance pressure compensation stabilizing device of a numerical control planer type milling machine, which comprises a portal frame, the portal frame consists of two upright posts and a top beam, the two upright posts are bilaterally symmetrical, and a cross beam component is slidably connected between the upright posts. A first hydraulic cylinder is installed on the main shaft assembly, two second hydraulic cylinders are installed on the top beam, the telescopic ends of the second hydraulic cylinders are connected with the cross beam assembly, and first nitrogen balance assemblies are installed on the outer sides of the stand columns. According to the gravity compensation device, external power equipment is not needed, nitrogen hydraulic pressure is combined under the action of a traditional power mode, automatic gravity compensation conversion is completed in the specific using process, the device runs more stably, efficiently and accurately, generated noise is reduced, meanwhile, a nitrogen cylinder which is prone to being lost is shielded and protected, and the service life of the nitrogen cylinder is prolonged. And the protection effect on the hydraulic pipe is enhanced, the use safety of the device is further improved, and the service life of the device is prolonged.

The utility model discloses a device for assisting accurate metering and conveying of low-boiling-point easily-gasified liquid, and belongs to the technical field of liquid conveying devices. A device for assisting accurate metering and conveying of low-boiling-point easily-gasified liquid comprises a liquid storage tank and further comprises an auxiliary stable conveying device used for pressurizing the liquid storage tank, increasing the boiling point of the conveyed liquid and reducing the temperature of the conveyed liquid; the auxiliary stable conveying device comprises a constant pressure valve, a buffer tank, a jacketed pipe, a nitrogen steel cylinder and a compression refrigerator; the liquid inlet end of the buffer tank is connected with the liquid storage tank; the nitrogen steel cylinder is connected with the gas inlet end of the constant pressure valve; the auxiliary stable conveying device is used for pressurizing the conveyed liquid storage tank, the boiling point of the conveyed liquid is increased, meanwhile, the temperature of the conveyed liquid is lowered, gasification of the liquid entering the metering pump cavity is reduced, the gas binding phenomenon is prevented, and therefore the purpose of continuously and stably conveying the liquid is achieved.

The invention provides a cleaning device for probe card production and processing, and relates to the technical field of probe card cleaning, the cleaning device comprises a bottom plate, the top of the bottom plate is fixedly connected with a sealing bin, the top of the sealing bin is provided with a butt joint groove, the outer surface of the sealing bin is fixedly connected with a dryer, and the dryer is in butt joint with a nitrogen cylinder; the outer surface of the dryer is fixedly connected with an air outlet; the bottom of the top cover is fixedly connected with a butt joint column matched with the butt joint groove, and the top of the top cover is fixedly connected with a handle; the probe card cleaning device further comprises a cleaning unit arranged on the inner wall of the sealing bin and a deep cleaning unit arranged on the inner wall of the top cover, a probe card needs to be placed into the cleaning unit, the outer surface of the probe card is cleaned and brushed, then the deep cleaning unit conducts deep cleaning on a probe mounting hole in the probe card, and after cleaning is completed, the probe card is cleaned and cleaned. And the drying machine is used for drying the probe card.

The invention relates to the technical field of out-of-tube boiling heat exchange, and discloses a visual bias type multi-type out-of-tube normal-temperature boiling heat exchange experiment system which comprises a shell-and-tube heat exchanger body, an evaporative condenser, a magnetic transmission gear pump, a liquid level meter, a metal float flowmeter, a data collector, a constant-temperature water tank, a turbine flowmeter, a low-temperature constant-temperature bath and a nitrogen cylinder. According to the system, the boiling phenomenon outside the heat exchange copper pipe in the heat exchanger can be observed and the heat exchange coefficients of the heat exchange pipes in different shapes can be measured through the visual offset type outside-pipe normal-temperature boiling heat exchange experiment system and the effective connection of the heat exchange copper pipe, the shell, the visual window and the light source collection port; the system is simple in structure and convenient to operate, can test related operation parameters of each component in the refrigeration process, realizes the characteristic of multiple functions of one set of system, adopts double-layer laminated transparent toughened glass as a light-transmitting material, has good sealing performance and high pressure resistance, and can realize visual test of boiling heat exchange outside a refrigerant pipe.

The invention belongs to the technical field of aluminum ash detection, and discloses a device for measuring the content of metallic aluminum in aluminum ash, which comprises a nitrogen bottle, an ammonia gas absorption bottle, a double-elbow gas measuring pipe, a reaction bottle, a sample bottle, a leveling bottle, an electric furnace, a copper oxide pipe, a first gas guide pipe, a second gas guide pipe and a breather pipe, the breather pipe is provided with a first valve, a third valve, a fourth valve, a fifth valve and a sixth valve in sequence; the upper end of a spherical pipe of the double-elbow gas measuring pipe is connected with the breather pipe through a fifth valve, and the lower ends of a straight pipe and the spherical pipe of the double-elbow gas measuring pipe are connected with the leveling bottle through a seventh valve and an eighth valve respectively; one end of the copper oxide tube is connected with the third valve, and the other end of the copper oxide tube is connected with the fourth valve. Ammonia gas absorption and copper oxide reduction are achieved through valve switching, the hydrogen amount is obtained by measuring the volume, temperature and air pressure of gas in the device before and after copper oxide reduction through hydrogen, then the metal aluminum content in the aluminum ash is obtained, and the influence of aluminum nitride and aluminum carbide in the aluminum ash is effectively avoided.