120 results about "Nitrogen pressure" patented technology

The invention belongs to the field of vacuum obtaining equipment and valves, and particularly relates to a dual pump mutual backup system suitable for a semiconductor harsh process, which comprises a first dry pump and a second dry pump which have the same model and the same pumping speed and are used for alternately starting to provide a vacuum environment; the two-way quick valve group is arranged between the reaction cavity and the air inlet of the dry pump; the reaction cavity is communicated with the two-way quick valve group through a pipeline; the double-pump switching control system is used for receiving an alarm signal of the dry pump in real time and triggering state switching of the two-way quick valve group; and the pressure stabilizing unit is connected with a driving gas path of the two-way quick valve group and is used for maintaining the pressure of the valve driving gas path to be stable when the factory nitrogen pressure is insufficient. When the main working dry pump fails to give an alarm, the system can be automatically switched to the standby dry pump in an extremely short time, so that the vacuum environment of the reaction cavity is not interrupted and does not return pressure, the scrapping of the whole batch of wafers caused by the failure of a single pump is avoided, and the production loss is remarkably reduced.

The utility model relates to the technical field of chemical engineering, in particular to an adsorption tower nitrogen system which comprises an adsorption tower, a raffinate mixing tank, a desorption agent main pipeline, a first outlet line, a second outlet line, a central outlet line, a nitrogen pressure maintaining line, a nitrogen pipeline, a crossover line and a pumping circulation line, valves are arranged at an outlet and an inlet of the raffinate mixing tank; the desorption agent main pipeline is connected to an inlet I of the adsorption tower; one end of the first outlet line is connected to an outlet I of the adsorption tower, and the other end of the first outlet line is connected to the raffinate tower through the raffinate mixing tank. During the shutdown period of the adsorption tower, the pressure of the central pipe of the adsorption tower can be maintained, the deformation of the central pipe is prevented, the balance with the pressure of the adsorption tower is realized, and the purpose of protecting equipment is achieved.

The application discloses a kind of continuous self-bleeding self-suction pumps, it is related to self-suction pump technical field, including main body, the upper portion of the main body is provided with self-suction tank, the top of the main body is equipped with steam jacket heat tracing, the upper end of steam jacket heat tracing is equipped with injection device, the lower end of self-suction tank is provided with sealing device, the middle of sealing device is equipped with pipeline, the bottom of pipeline is equipped with fixing device, the right end of fixing device is provided with ground tank, the upper end of ground tank is equipped with nitrogen pressure exhaust pipeline device.The application is fixed on the upper end of steam jacket heat tracing by outer frame, then connects steam pipe line by the pipe joint of right end, exhausts gas in ground tank to expansion pipe, carries out gas expansion, exhausts the gas after completion of expansion to mixing chamber, makes it mixed jet pump, then is discharged by nozzle, without manual filling pump.Again by the pipeline cavity of through frame inner cavity through connecting pipeline.

According to the gas inlet technology and device for the oxygen compressor in the nitrogen starting operation stage, normal-temperature nitrogen output by liquid nitrogen gasification equipment of an air separation device is designed to serve as a nitrogen source for the oxygen compressor in the nitrogen starting operation stage according to the gas inlet pressure and the flow design value of the oxygen compressor; by means of the adjusting functions of a liquid nitrogen pump frequency converter and a nitrogen pneumatic type conveying valve, the rotating speed of a liquid nitrogen pump is changed, the opening degree of the pneumatic type nitrogen conveying valve is adjusted, the normal-temperature nitrogen pressure and flow value of an outlet of a liquid nitrogen gasifier are adjusted to the oxygen compressor air inlet pressure and flow design value, and the nitrogen is conveyed to an oxygen compressor air inlet pipeline; according to the method, the problem of oxygen compressor operation condition deviation caused by the fact that the nitrogen inlet pressure value generated by using the low-pressure nitrogen and medium-pressure nitrogen inlet technology in the oxygen compressor nitrogen starting operation stage does not accord with the oxygen compressor air inlet pressure design value is solved, and the safety and stability of the oxygen compressor nitrogen starting operation stage are remarkably improved.

This invention discloses a distillation column pressure control device, belonging to the technical field of distillation column top pressure control. It includes a distillation mechanism, a condensation system, a reflux mechanism, and a nitrogen pressure stabilization system. The distillation mechanism includes a distillation column and pipelines, with the column connected to the pipelines. The reflux mechanism includes a reflux tank; gas flows from the top of the distillation column through the pipeline into the condensation system, where it is condensed and liquefied into liquid, flowing into the reflux tank, and then from the reflux tank back into the top of the distillation column. The nitrogen pressure stabilization system is directly connected to the distillation column through pipelines, supplying nitrogen to the top of the column. This invention has the advantages of rapid control of the distillation column top pressure, avoidance of gas reflux, fast pressure stabilization, and small pressure fluctuation range.

The application discloses a kind of nitrogen pressure regulating reactor thermal-hydraulic numerical analysis method and equipment, through the joint analysis method of one-dimensional system level thermal-hydraulic analysis program and equipment internal three-dimensional structure level CFD program, nitrogen dissolution, migration, precipitation, accumulation and the like in nitrogen pressure regulating reactor Phenomenon and the thermal-hydraulic effect caused thereby are predicted throughout the process, and further analyze its influence on loop flow heat transfer characteristics, the working performance of key equipment.The application can realize multi-dimensional and multi-scale calculation and analysis, without consuming a large amount of computing resources, to predict the dissolution, migration, precipitation and accumulation behavior of nitrogen in the coolant and the thermal-hydraulic effect caused thereby, support the review of nitrogen pressure regulating reactor design scheme and the development of operation strategy.

The disclosure provides a kind of lunar sample storage device air pressure regulating system, comprising: moon sample storage unit is configured to store lunar sample and maintain micro-positive pressure environment to isolate atmospheric pollutants;Pressure regulating unit is connected with the moon sample storage unit, configured to adjust the pressure in the moon sample storage unit to stabilize the micro-positive pressure environment in the moon sample storage unit, comprising: negative pressure buffer tank configured to receive the gas discharged when the pressure in the moon sample storage tank is too high, and positive pressure air supplement tank configured to supplement gas when the pressure in the moon sample storage tank is too low;Gas supply unit is connected with the pressure regulating unit, configured to provide high-purity nitrogen;Pressure monitoring unit is configured to monitor the pressure in the moon sample storage unit and the pressure regulating unit respectively;Control unit is electrically connected with the pressure regulating unit, gas supply unit and pressure monitoring unit respectively, configured to control the operation of each unit according to pressure monitoring data.

The invention belongs to the technical field of TRT equipment sealing, and provides a TRT high-pressure gas shaft seal end nitrogen positive pressure adjusting sealing method which comprises the steps that firstly, a historical period is divided into small time periods, and lagging unbalance time periods are recognized; secondly, calculating a lag imbalance index through statistical analysis, and judging whether an imbalance phenomenon exists or not; establishing a correlation model of the pressure fluctuation of the nitrogen supply mother pipe and the opening degree of the valve; determining a pressure early warning interval based on historical data; and finally, the parameters of the sealing end are monitored in real time and compared with the early warning interval, and the opening degree of the valve is dynamically adjusted, so that the problem of sealing failure caused by sudden drop of nitrogen pressure / flow and response lag of an adjusting mechanism in the prior art is solved, advanced pre-judgment and accurate intervention of lag imbalance are realized, equipment operation safety and production continuity are guaranteed, and the working efficiency is improved. And the gas leakage risk and the maintenance cost are reduced.

The utility model relates to a vacuum automatic dehydration system which comprises a vacuum condenser, a dehydration tank and a Roots water ring vacuum unit, a first stop valve is arranged on a gas phase outlet pipeline of the vacuum condenser, and a second stop valve is arranged on a gas phase outlet pipeline of the dehydration tank. According to the technical scheme, a condensate tank is arranged below the vacuum condenser, the height difference between the condensate tank and the vacuum condenser is at least 10 m, a submerged pipe is arranged at the bottom of the vacuum condenser, an overflow pipe is arranged on the upper portion of the side wall of the condensate tank, a bypass branch is connected between the inlet side of the first stop valve and the outlet side of the second stop valve, and a third stop valve is arranged on the bypass branch. A pressure gauge and a nitrogen pressure supplementing pipeline are arranged at the top of the dehydration tank, a fourth stop valve is arranged on the nitrogen pressure supplementing pipeline, a liquid level meter is arranged on the lower portion of the side wall of the dehydration tank, and a drainage pipe is arranged at the bottom of the dehydration tank and provided with a fifth stop valve. The system solves the problem of manual drainage, is high in dehydration efficiency, avoids the failure of the vacuum unit, and reduces the equipment failure rate and the labor intensity of workers.

The invention discloses a breaking hammer with a piston reset function and a storage control method, and belongs to the technical field of breaking hammer control, the storage control method comprises the following steps: acquiring a signal that an excavator is switched to an intelligent storage mode, starting to receive a nitrogen pressure feedback signal in a rear cylinder body, and if the nitrogen pressure is greater than 0, starting to control the piston reset function; if yes, an electromagnetic switch on the rear cylinder body is controlled to be turned on to release nitrogen, and nitrogen pressure is gradually reduced; if the nitrogen pressure is reduced to 0, a main pump starts to be controlled to work, and high-pressure oil is supplied to a middle cylinder body, so that a piston continuously ascends under the action of the high-pressure oil; and when a reversing point on the piston reaches the position of a signal groove in the middle cylinder body, a piston tail end position signal is obtained, the main pump is controlled to stop working, and then the electromagnetic switch on the rear cylinder body is controlled to be turned off. Manual operation is not needed, automatic nitrogen discharging of the breaking hammer and automatic retraction of the piston can be achieved, and the corrosion phenomenon of the sealing section of the piston during long-term storage is prevented.

The invention provides a liquid dynamic magnetic field treatment and fluidity measurement integrated device and method, and the device comprises an experimental device which comprises a liquid storage tank, a nitrogen pressure regulating system, a circulating water system, an electromagnetic treatment system, and a flowing and metering system. The liquid storage tank is driven by air pressure to output an oil sample; the flowing and metering system comprises a capillary tube used as a crude oil sample electromagnetic treatment area, an inlet pressure sensor used for recording the inlet pressure of a capillary tube pipeline, and a mass flow meter used for calculating the mass of the oil sample subjected to electromagnetic treatment; the electromagnetic processing system comprises an electric field processing module and a magnetic field processing module; when the integrated device works, the electromagnetic processing system applies an electric field or a magnetic field parallel to the flowing direction of the oil sample to the oil sample flowing in the capillary tube, or simultaneously applies the electric field and the magnetic field; the oil sample temperature is adjusted by the circulating water system; the oil sample flow rate is adjusted by the nitrogen pressure adjusting system; according to the invention, the problems of oil product electromagnetic treatment and integrated testing can be solved.

The invention discloses a nitrogen pressure adjusting device based on a mainboard control electromagnetic valve, and relates to the field of pipeline pressure adjustment. A nitrogen pressure adjusting device based on a mainboard control electromagnetic valve comprises the electromagnetic valve, a mainboard box for controlling the mainboard is installed on the electromagnetic valve, the air inlet end and the air outlet end of the electromagnetic valve are connected with an air inlet pipe and an air outlet pipe respectively, and the nitrogen pressure adjusting device further comprises pressure sensors fixedly connected to the air inlet pipe and the air outlet pipe respectively. The pressure sensor is used for detecting nitrogen pressure in the gas inlet pipe and the gas outlet pipe; the air inlet end of the pressure relief tank is communicated with the air inlet pipe; through the arrangement of the pressure relief tank, when a nitrogen conveying pipeline is shut down through the electromagnetic valve, redundant air pressure at the air inlet end can be adjusted, sudden pressure increase caused by the water hammer effect is reduced, the influence of the sudden pressure increase on a sealing piece is reduced, the service life of the sealing piece is effectively prolonged, and the safety of the sealing piece is improved. And long-time use is facilitated.

The utility model belongs to hydrogen fuel cell technical field especially relates to a hydrogen pressure reducing device with explosion -proof function. The utility model provides a hydrogen pressure reducing device with explosion -proof function, include: hydrogen delivery pipe, nitrogen delivery pipe, hydrogen pressure reducing valve, nitrogen pressure reducing valve, safety valve, nitrogen purging pipe, emptying pipe and multiple ball valves, pressure gauge and safety pipeline, through hydrogen pressure reducing valve and safety valve overpressure automatic pressure relief function, ensure that system pressure is stable, nitrogen purging pipe and emptying pipe constitute purging system, can remove residual hydrogen in pipeline, avoid the risk of explosion, each ball valve realizes gas source quick opening and closing control, and pressure gauge real -time monitoring pressure state, the device is equipped with check valve to prevent gas backflow, and filter guarantees that gas is pure. The utility model passes through multiple safety design, and the explosion -proof performance and operating safety are improved obviously.

The utility model relates to the technical field of air separation devices, in particular to a nitrogen mutual protection device of an air separation system. According to the technical scheme, the device comprises an outer box, a first pipeline is installed at the top end of one side in the outer box in a penetrating mode, a first electromagnetic valve is arranged at one end of the first pipeline, a second pipeline is arranged at one end of the first electromagnetic valve, a first pressure monitoring meter is arranged at one end of the second pipeline, and a fourth pipeline is installed at the bottom end of one side in the outer box in a penetrating mode; a second electromagnetic valve is arranged at one end of the fourth pipeline, a fifth pipeline is arranged at one end of the second electromagnetic valve, and a second pressure monitoring meter is arranged at one end of the fifth pipeline. The first pipeline and the fourth pipeline are connected with the output ends of the two nitrogen compressors respectively, the electromagnetic valve and the pressure monitoring meter are arranged, automatic mutual protection of nitrogen is achieved, when one nitrogen compressor breaks down, the pressure monitoring meter can monitor insufficient nitrogen pressure in time, the reversing valve is automatically triggered to be switched to the other nitrogen compressor, and the nitrogen compressor is prevented from breaking down. And the continuity of nitrogen supply is ensured.

The application discloses a kind of methanol liquid fuel nitrogen pressurization storage tank and its working method, belong to pressure vessel technical field.The both sides of the top of tank body are respectively fixedly connected with protective handle, and the top of tank body is equipped with liquid inlet, vacuumizing and nitrogen filling port and pressure gauge between the two protective handles of the top of tank body, and the liquid inlet is connected with liquid inlet valve, and the vacuumizing and nitrogen filling port is connected with inlet valve;The upper end of central cannula is stretched out the top of tank body and is fixedly connected with the top of tank body, and the lower end of central cannula is stretched into the inside of tank body;Tank body bottom is fixedly connected with a plurality of base, and tank body bottom is equipped with blowdown port.The application utilizes nitrogen pressure to drive fuel flow, does not need additional pump as power source, and nitrogen is inert gas, does not react with methanol at normal temperature, and it is safe and reliable;It does not need to use high storage tank, avoids the risk of leakage that is prone to occur in use or filling process, and is convenient for user to use.And the application can be directly connected with existing market fuel stove, without any modification.

A nitrogen filling device used for photoelectric product external air tightness detection comprises an inflating needle head (8) used for being placed in an air inlet of a photoelectric product, a pressure reducing valve (3) used for being connected with a nitrogen storage tank, a barometer (6) used for measuring the pressure value of nitrogen in the photoelectric product, and a pipeline assembly arranged among the inflating needle head (8), the pressure reducing valve (3) and the barometer (6). By means of the pipeline assembly, the inflating needle head (8), the pressure reducing valve (3) and the barometer (6) are communicated and connected with one another, the photoelectric product is inflated with nitrogen through the inflating needle head (8), the pressure value of the nitrogen in the photoelectric product is monitored on line through the pressure reducing valve (3) and the barometer (6), the nitrogen in the photoelectric product is within a limited range, and the photoelectric product is protected. The technical problem that nitrogen is directly charged by using a nitrogen cylinder is solved, so that the risk of damage to photoelectric products in the nitrogen charging process is reduced.

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.

A kind of stepless regulation nitrogen pressure stabilizing rotating central cylinder high-voltage electrode boiler system, including support leg, boiler shell installed on support leg, safety valve, boiler water outlet pipeline, several small supports installed on the inner wall of boiler shell, insulating seat installed on small support, boiler inner cylinder installed on insulating seat, boiler water inlet pipeline, high-voltage electrode insulating base installed on the top of boiler shell, several high-voltage electrodes installed on the lower end of high-voltage electrode insulating base and inserted into boiler inner cylinder, nitrogen pipeline installed on the top of boiler shell, nitrogen container connected with the end of nitrogen pipeline, rotating central cylinder device installed on the central part of the bottom of boiler shell.The stepless regulation nitrogen pressure stabilizing rotating central cylinder high-voltage electrode boiler system of the application has simple structure, low investment cost, stable operation, stepless regulation, stable pressure and energy saving, and can be widely used in clean energy heating and power plant flexible peak shaving field.

The present invention mentions an induction furnace bottom blowing device for pressurized gas phase nitriding and bottom blowing nitrogen to increase nitrogen, and a high nitrogen steel preparation method. The bottom blowing device is composed of a pressure reducing valve, a one-way valve, a stop valve, a flow meter and a parallel pipeline, which are sequentially connected to the nitrogen output, namely the pipeline where the solenoid valve connected to the furnace chamber is located, and the bottom blowing pipeline connected to the vent. The high nitrogen steel preparation method comprises: after the alloy material is completely melted, the solenoid valve is opened, and nitrogen is filled into the furnace chamber from the vent to the target pressure. The opening of the solenoid valve can ensure the pressure balance between the furnace chamber and the bottom blowing pipeline; after the nitrogen pressure stabilizes, the solenoid valve is closed, and the pressure reducing valve is opened to the flow meter in sequence to perform pressurized bottom blowing; after the nitriding is completed, the pressure reducing valve is closed to the flow meter in sequence, the solenoid valve is opened, and the pressurized bottom blowing is stopped. The present invention significantly improves the nitrogen increase rate of molten steel, shortens the smelting cycle, and realizes the efficient preparation of high nitrogen steel. At the same time, it also effectively avoids the occurrence of vent plug blockage and steel leakage.

According to the sintering furnace system, the electronic pressure gauge is arranged between the nitrogen supply device and the furnace body, and the electronic pressure gauge can detect the nitrogen flow between the nitrogen supply device and the furnace body. A first pneumatic valve and a first controller are arranged between the hydrogen supply device and the furnace body, and the first controller is in communication connection with the electronic pressure gauge. When the pressure value of the nitrogen is abnormal, the electronic pressure gauge can detect the abnormal flow of the nitrogen and transmit an abnormal signal to the first controller, and the first controller can automatically and timely cut off the supply of the hydrogen by the first pneumatic valve, so that the potential safety hazard caused by sharp increase of the concentration of the hydrogen in the furnace body is reduced.

The application discloses a kind of low-aluminum low-sulfur high-chromium high-nitrogen series pressure vessel steel and smelting method, belong to steelmaking technical field, its chemical component and weight percentage are as follows: C:0.06-0.15%, Si:0.2-0.5%, Mn:0.3-0.6%, P≤0.025%, S≤0.003%, Alt 0.005-0.015%, Cr:8.0-13.5%, Mo:0.8-1.2%, V:0.15-0.3%, Nb:0.05-0.1%, N:0.03-0.08%, the balance is Fe and other inevitable impurities.Smelting method is converter smelting, LF refining, RH vacuum treatment and conventional continuous casting.The application does not need to increase equipment, ensures deep desulfurization under low Alt condition, optimizes LF refining parameter, smelts high N high Cr steel using LF furnace, stably controls each component, so that the composition of molten steel meets the requirements.

This invention belongs to the field of blast furnace gas heating furnace operation control technology, specifically disclosing a 2500m 3 The HyCROF gas-fired furnace blast furnace changeover fluctuation solution utilizes high-purity nitrogen instead of traditional decarbonized gas as the pressure equalization medium. It reconstructs a three-stage changeover process: nitrogen purging and inerting, nitrogen pressure equalization, and undisturbed gas switching. Combined with PLC system linkage control and key parameter solidification, this achieves undisturbed operation during the changeover process. This invention fundamentally solves the problems caused by traditional changeover methods, such as drastic fluctuations in gas flow and pressure, disordered gas flow distribution, excessive blast furnace pressure differential, unstable furnace temperature and molten iron quality, and safety hazards. It reduces gas flow fluctuations to ≤5%, blast furnace pressure differential fluctuations to ≤0.003MPa, and increases the smooth operation rate to 99.5%, while simultaneously reducing the fuel ratio, improving gas utilization, and eliminating safety risks.

The invention belongs to the technical field of milk powder production and packaging equipment, and particularly discloses a liquid nitrogen tank for fresh-keeping packaging based on immunity-enhancing milk powder production. The pressurizing mechanism is mounted on the tank body and is used for gasifying part of liquid nitrogen to increase the pressure in the tank body; the liquid nitrogen output device comprises an output pipe, a pressure pipe and a discharge assembly; and the output pipe is vertically inserted into the inner wall of the bottom of the tank body in a penetrating manner. By means of the combined structure of the discharging assembly and the control mechanism, after liquid nitrogen conveying is completed, nitrogen pressure generated by the pressurizing mechanism can be used for completely extruding residual liquid nitrogen in the output pipe to the discharging pipe, the residual liquid nitrogen finally flows back to the inner container of the tank body, and the design fundamentally avoids long-term remaining of the liquid nitrogen at the top of the control valve; the problems that in a traditional liquid nitrogen tank, a valve sealing piece is hardened, embrittled and loses elasticity due to continuous low temperature bearing are thoroughly solved, the sealing performance of a control valve is remarkably improved, and the risk of liquid nitrogen leakage is reduced.

A tester apparatus is described of the kind having contact with terminals on a wafer for purposes of testing the wafer. A dielectric gas is used to reduce arcing between the contact. A stationary structure and a portable structure have complimentary gas interfaces that engage when the portable structure engages with the stationary structure. A gas box has a channeling block connected to a dielectric gas pressure regulator and a nitrogen gas pressure regulator and connected to a gas supply passage to selectably provide nitrogen or dielectric gas to the gas supply passage. A tray has a portion that is electrically conductive to make contact with a rear wafer terminal, vacuum passages, and each vacuum passage has an enlarged section to reduce.

The invention discloses a nuclear power station shielding type main pump vacuumizing and nitrogen backfilling device applied to the technical field of nuclear power station reactor coolant pump maintenance, according to the scheme, through a positive and negative pressure gauge, a second vacuum pressure gauge and a first vacuum pressure gauge, various pressure indexes can be closely monitored in the vacuumizing and nitrogen backfilling process, and the working efficiency is improved. Therefore, the gas pressure in the whole process is effectively ensured to be in a safe range, and the shielding sleeve is not easy to damage. In addition, by matching with the arrangement of a graded pressure relief unit, according to the pressure condition of nitrogen, no additional operation is needed, self-adaptive pressure relief of nitrogen can be automatically achieved, when the nitrogen pressure is large, a pressure consumption assembly is automatically extruded, the nitrogen is subjected to pressure relief of more pressure relief strips and then backfilled into a main pump stator cavity, and when the nitrogen pressure is relatively small, the nitrogen pressure is reduced. And the pressure of the finally discharged nitrogen tends to be consistent through pressure relief of fewer pressure relief strips, so that the possibility that the shielding sleeve is damaged by the nitrogen is further reduced, and the nitrogen backfilling process is stable, continuous and safe.

The invention relates to a self-control nitrogen safety sealing system which comprises a nitrogen pressure-stabilizing balance tank and also comprises a high-pressure nitrogen pipe, a nitrogen pressure-stabilizing valve, a nitrogen pressure-stabilizing valve and a nitrogen pressure-stabilizing valve, one end of the high-pressure nitrogen pipe is communicated with the top of the nitrogen pressure-stabilizing balance tank, the other end of the high-pressure nitrogen pipe is communicated with a high-pressure nitrogen source, and a nitrogen pressure-stabilizing valve is arranged on the high-pressure nitrogen pipe; one end of the regulating valve gas outlet pipe is communicated with the top of the nitrogen pressure-stabilizing balance tank, the other end of the regulating valve gas outlet pipe is communicated to the outside of the system through a tail gas pipe, and a tail gas self-operated regulating valve is arranged on the regulating valve gas outlet pipe; one end of the breathing header pipe is communicated with the top of the nitrogen pressure-stabilizing balance tank, and the other end of the breathing header pipe is communicated with a plurality of material storage tanks. According to the invention, gas can be supplied to a plurality of material storage tanks simultaneously through one nitrogen pressure-stabilizing balance tank, and complementation and balance of gas phases among the material storage tanks can be automatically realized, so that the consumption of nitrogen is effectively reduced, and favorable conditions are created for energy conservation and environmental protection. Meanwhile, the arrangement quantity of nitrogen supply valves and nitrogen discharge valves can be reduced, the failure rate of the system is reduced, and cost reduction and efficiency improvement are achieved.

The application relates to the technical field of steel bottle pressure maintaining, in particular to a device and method for helium-nitrogen pressure maintaining of a steel bottle, which comprises a helium-nitrogen mixed gas bottle group, a first membrane presser and a second membrane presser connected with the helium-nitrogen mixed gas bottle group through pipelines, a vacuum pump and a vacuum buffer tank connected with the first membrane presser and the second membrane presser through pipelines respectively, a first pressure maintaining and filling row and a second pressure maintaining and filling row connected with the first membrane presser and the second membrane presser through pipelines, a first steel bottle and a second steel bottle connected with the first pressure maintaining and filling row and the second pressure maintaining and filling row through pipelines, and an outlet of a helium-nitrogen mixed gas storage tank connected with inlet pipelines of the first membrane presser and the second membrane presser. Therefore, the device and method for helium-nitrogen pressure maintaining of a steel bottle can solve the technical problem that equipment failure or improper operation may lead to gas leakage, pressure out of control and other serious consequences, and threatens personnel and property.

The application provides a die casting machine intelligent energy storage control method and system, the method comprises the following steps: energy storage self-checking: when the energy storage tank is exhausted and the hydraulic oil air bag reaches a relaxed state, the locking nitrogen pressure value is obtained, it is judged whether the locking nitrogen pressure value belongs to the first preset nitrogen pressure range, if not, an alarm is given, if yes, the energy storage target nitrogen pressure value is determined; determining the energy storage target nitrogen pressure value: selecting the energy storage mode, obtaining the energy storage target nitrogen pressure value, and controlling the energy storage tank to start energy storage according to the obtained energy storage target nitrogen pressure value; energy storage judgment: obtaining the real-time nitrogen pressure value in the energy storage process, judging the size relationship between the real-time nitrogen pressure value and the energy storage target nitrogen pressure value, and obtaining a judgment result; energy storage control: controlling the energy storage state of the energy storage tank according to the judgment result of the energy storage judgment. Thus, the die casting machine intelligent energy storage control can be realized.

The invention discloses an evaporative cooler spray gun medium automatic switching system and method. The evaporative cooler spray gun medium automatic switching system comprises an evaporative cooler and a coarse ash hopper connected to a discharging opening in the bottom of the evaporative cooler. A spray nozzle for spraying is arranged at the upper end of the evaporative cooler, and a water supply pipeline, a saturated steam pipeline and a nitrogen pipeline are connected with the spray nozzle; a water supply regulating valve, a water supply pressure gauge and a water supply flowmeter are arranged on the water supply pipeline; a total flow meter, a total pressure gauge, a steam electric stop valve, a steam pressure gauge and a steam flow meter are sequentially arranged on the saturated steam pipeline; and a nitrogen electric stop valve, a nitrogen pressure gauge and a nitrogen flow meter are sequentially arranged on the nitrogen pipeline. Steam is used for spraying water, the gas recovery concentration is improved, and the cost is reduced; nitrogen is used for spraying water, automatic spraying of the converter evaporative cooler under the condition of insufficient steam is achieved, meanwhile, it is ensured that a coarse ash system can operate normally, free switching of steam / nitrogen serving as an atomizing medium is achieved, and it is ensured that the system can operate safely, reliably and efficiently.

The invention discloses a magnetofluid sealing structure with a conical sealing gap. The magnetofluid sealing structure comprises a conical shaft sleeve, a bearing assembly, a magnetofluid sealing assembly and a sealing cover assembly. And the size of the sealing gap can be flexibly adjusted by axially moving the magnetic conductive shaft sleeve, so that the sealing capability in practical application is convenient to adjust. Due to the design of the inclined sealing gap, the magnetic fluid is more uniformly distributed in the gap, the sealing pressure can be effectively improved, and leakage is prevented. A small hole is formed in the middle of each sealing magnetic pole, the pressure nitrogen is introduced, the pressure of the introduced nitrogen is gradually reduced from front to back, and the magnetic fluid sealing capacity of each magnetic pole is improved through introduction of the pressure nitrogen. According to the magnetofluid sealing structure with the conical sealing gap, the existing defects are overcome, the sealing gap is adjustable, and the sealing performance is effectively improved.