19 results about "Helium pressure" patented technology

The invention relates to the technical field of high-temperature alloys, and provides a low-segregation high-temperature alloy and a control method for segregation defects of the high-temperature alloy, and the control method comprises the following steps: S1, according to the ingot type size of a high-temperature alloy vacuum consumable ingot, determining the height of the high-temperature alloy vacuum consumable ingot corresponding to the reduction of the melting speed in a vacuum consumable steady-state smelting period; according to the content range of segregation elements in the high-temperature alloy, the melting speed decreasing range is determined; according to the ingot shape size of the high-temperature alloy vacuum consumable ingot, the helium pressure drop range in the heat top sealing period is determined; and S2, carrying out vacuum consumable smelting on the high-temperature alloy according to the vacuum consumable smelting process determined in the step S1. According to the control method provided by the invention, the problem of black spot control of high-temperature alloy vacuum consumable ingots with different ingot types and alloy component marks is solved, and the low-segregation high-temperature alloy consumable ingots are prepared.

The invention provides a cavern helium storage method which comprises the following steps: S1, after salt cavern cavity construction is finished, carrying out gas injection and brine discharge for the first time through a gas injection and brine discharge system to form a gas storage space; s2, helium in the helium tube bundle truck is subjected to first-stage pressure reduction, second-stage pressure reduction, water removal and oil removal, then gas injection, brine discharge and gas storage are conducted through a gas injection and brine discharge system, and the helium is injected into a salt cavern to be stored; s3, starting a salt cavern helium extraction pump to extract helium, and measuring the pressure and temperature data of the extracted helium; s4, the extracted helium is purified; s5, the purified helium is liquefied; and S6, filling liquid helium. The salt cavern helium storage method is suitable for storing helium which is high in price and prone to leakage, and normal supply of helium in China is guaranteed.

The utility model discloses an inflation recovery system of helium detection equipment for airtightness of a battery sealing cover of a new energy automobile. The inflation recovery system comprises a vacuum pump, a gas storage tank, a pressure detection unit, a booster pump and a helium supply device, the vacuum pump is used for performing vacuum treatment on the product cavity; the gas storage tank is used for supplying helium into the product cavity; the pressure detection unit is used for detecting the air pressure in the product cavity; the booster pump is used for recycling and compressing the mixed helium in the product cavity into the gas storage tank; the output end of the helium supply device is communicated with the gas storage tank through a pipeline V and is used for supplying helium to the gas storage tank; mixed helium in the product cavity can be recycled and compressed into the gas storage tank through the booster pump, compared with existing helium detection equipment, helium does not need to be discharged, the helium recycling function is achieved, and the helium detection cost is reduced. In addition, through mutual cooperation of a helium supply device and a sixth electromagnetic valve, helium can be automatically supplied to the interior of the gas storage tank, and the automatic supplementing function is achieved.

The invention provides a wafer temperature uniformity control system and method based on multi-zone dynamic compensation, and the method comprises the steps: carrying a wafer through a multi-zone electrostatic chuck, and arranging a temperature sensor and a heating / cooling execution unit in each temperature control zone of the electrostatic chuck at the same time; the back helium pressure of each subarea is independently adjusted by using a multi-channel back blowing inert gas pressure supply module; a process power signal is collected in real time by means of a process power monitoring interface, a first calculation unit, a second calculation unit and a third calculation unit in the dynamic compensation controller cooperatively calculate the partition thermal compensation amount, and finally a control unit outputs a corresponding heating / cooling power instruction and a back helium pressure instruction which are quickly executed by an execution mechanism; through the above structure, double-channel rapid compensation can be simultaneously carried out on the temperature deviation in the wafer surface and the external power disturbance, and the wafer temperature uniformity error is stably controlled within + / -0.1 DEG C.

The application provides a liquid ammonia filling system, which comprises a finished product tank, a nitrogen purging system, a helium pressure maintaining system, a pressure sensor, a liquid ammonia filling container, a gas extraction pump, an exhaust treatment device, an ammonia gas analysis system, a first condensing device, a condensing recovery tank, a second condensing device and a waste liquid tank; the outlet of the nitrogen purging system and the outlet of the helium pressure maintaining system are both communicated with the inlet of the liquid ammonia filling container, the outlet of the liquid ammonia filling container, the inlet of the gas extraction pump and the exhaust treatment device are sequentially communicated; when the ammonia purity in the liquid ammonia filling container is qualified after analysis by the ammonia gas analysis system, the ammonia gas in the liquid ammonia filling container is condensed into liquid ammonia by the first condensing device and then stored in the condensing recovery tank; when the ammonia purity in the liquid ammonia filling container is unqualified after analysis by the ammonia gas analysis system, the ammonia gas in the liquid ammonia filling container is condensed into liquid ammonia by the second condensing device and then stored in the waste liquid tank.

The invention belongs to the technical field of nuclear fuel, and particularly relates to fuel rod helium pressure nondestructive testing equipment. Comprising a sensor fixing piece, the sensor fixing piece is used for fixing a temperature sensor and is connected with a second bearing, a first spring is connected with a first screw, a clamping plate is connected with the first screw, an inductor is connected with a wheel and a screen, a resistance wire is wound on the inductor, and a gear is arranged on the wheel and used for transmitting power and is connected with the gear through meshing. The shoulder is used for connecting the rotating plate and the tensioner, the adjusting block is connected with the rotating plate, the front caliper is connected with the first bearing in the front end and connected with the wheel, the front end of the front caliper is connected with the tensioner, the motor is connected with the gear and connected with the rotating plate, the damper is connected with the clamping plate, the lengthening rod is connected with the tensioner and the rear end, and the bearing seat is connected with the second bearing. The shell is connected with the front end and the rear end. The method has the beneficial effects that the quality control of fuel rod production can be enhanced, and the leakage risk after the fuel rod enters a reactor is reduced.

The invention discloses an automatic intelligent machining device for computer internal devices, and particularly relates to the technical field of computer product production, the automatic intelligent machining device comprises a laser welding gun and a hard disk tool, the laser welding gun and the hard disk tool are both arranged in a helium chamber, the helium chamber and a helium hard disk are both filled with helium, the laser welding gun is further provided with a pressurizing box, and the pressurizing box is provided with a pressure sensor. An opening is formed in the bottom of the pressurization box, a sealing table top is arranged in the helium chamber corresponding to the peripheral area of the hard disk tool, an inflation pipe is further fixedly installed on the pressurization box and connected with pressurization equipment through a pipeline, and the pressurization equipment is used for increasing the helium pressure in the pressurization box. The hard disk shell can be directly subjected to laser welding in the helium environment, the helium hard disk can be fully filled with helium in advance, after welding is completed, the helium hard disk is directly obtained, replacement is not needed, the machining procedures are reduced, the production cost of the helium hard disk is reduced, and then the production cost of corresponding computer assemblies is reduced; and the production efficiency is effectively improved.

A superconducting machine system includes a superconducting electrical machine. The superconducting machine system also includes a cryogenic vessel. The cryogenic vessel encompasses the superconducting electrical machine. The superconducting machine system further includes a vacuum vessel wall encompassing the cryogenic vessel. The superconducting machine system even further includes a cryocooler coupled to the vacuum vessel wall, wherein the cryocooler is configured to cool the superconducting electrical machine. The superconducting machine system still further includes a system configured, when the cryocooler is switched to a non-operative state, to remove helium gas from within a cryocooler housing to reduce a helium gas pressure within the cryocooler to minimize a parasitic heat load generated when the cryocooler is switched from an operative state to the non-operative state.

The invention discloses a shale helium method porosity calculation method which comprises the following steps: S1, measuring the porosity of shale by using a helium method porosity measurement method, and obtaining the volume Vc of a sample chamber, the volume Vr of a reference chamber and the volume Vs of a standard block; the initial pressure Pr of the reference chamber and the initial pressure Ps of the sample chamber are recorded, and after helium enters the sample chamber, the value P (t) of the pressure of the sample chamber along with time is automatically recorded; s2, stopping recording the pressure of the sample chamber after 10-20 minutes, and performing fitting calculation on a pressure value P (0) of the sample chamber at zero moment and a limit equilibrium pressure value Pb by using a value P (t) of the pressure of the sample chamber along with time; and S3, respectively calculating the total volume Vb and the skeleton volume Vg of the rock sample, and finally calculating to obtain the shale porosity. According to the method provided by the invention, the shale helium method porosity can be accurately measured, and the problem that a shale helium method porosity measurement result is relatively large in error due to relatively long total volume measurement and helium pressure balance time is solved.

The invention relates to the technical field of gas storage and management, in particular to a liquid helium filling process and a filling system.The liquid helium filling process comprises the following steps that firstly, a salt cavern helium extraction pump is started, the pressure and speed of the extraction pump are adjusted, extracted helium is obtained, then the pressure and temperature data of the extracted helium are measured, and whether the pressure and temperature data meet the primary treatment standard or not is verified; and obtaining preliminary measurement data. According to the invention, by adjusting the pressure and speed of the extraction pump, the initial extraction process of helium is optimized, so that the helium can better adapt to the quality fluctuation of original gas. And continuous monitoring and secondary detection steps are added in the purification stage, so that the purity of helium is improved, and the impurity content is reduced. In the liquefying and filling process, temperature and pressure parameters are set, the accuracy of the filling amount is ensured through measurement, and the stability and safety of products are guaranteed. In conclusion, the operation flexibility is enhanced, the overall performance of the product is improved, and wider commercial and scientific research requirements are met.

The invention belongs to the technical field of helium extraction, and particularly discloses a multi-stage natural gas helium extraction device and method.The device comprises a pretreatment unit communicated with a natural gas pipe network and a multi-stage membrane separation unit connected with the pretreatment unit, and the multi-stage membrane separation unit comprises a first-stage membrane separation set to an Nth-stage membrane separation set; in the multi-stage membrane separation unit, in the second-stage membrane separation group to the N-stage membrane separation group, a first pressure swing adsorption unit is arranged at an impermeable gas outlet of each stage of membrane separation group, and desorption gas pipelines of the plurality of first pressure swing adsorption units are sequentially communicated with a decarburization compressor, a pretreatment unit and a pipe network; a product gas pipeline of the first pressure swing adsorption unit and a permeation gas outlet of each stage of membrane separation group from the second stage of membrane separation group to the Nth stage of membrane separation group are connected with a dehydrogenation tower, and the dehydrogenation tower is connected with a temperature swing adsorption refining unit through a pressure swing adsorption gas inlet compressor and a crude helium pressure swing adsorption unit in sequence.

The utility model belongs to the technical field of simulation demonstration devices, and particularly relates to a demonstration device for simulating the principle of a Beidou navigation flat floating sounding balloon, which demonstrates that a balloon I floats when the balloon I is placed in a box, carbon dioxide enters the box body, the concentration of the carbon dioxide is increased, and the buoyancy is greater than the gravity of the balloon I; the principle that helium filled in the sounding balloon rises in the atmosphere is simulated; demonstrating that the two micro pumps pump away air in the vacuum box, the pressure in the box is reduced, the helium pressure in the double-layer balloon is high, the external environment pressure is reduced, the balloon expands, the pressure borne by the outer balloon is high, the outer balloon is broken, and when the sounding balloon ascends, the atmosphere is thin, the atmospheric pressure is reduced, and the balloon expands; and 3, enabling the interior of the box to be close to vacuum through a micro pump, enabling the inner ball to lose external atmospheric buoyancy support, enabling the weight of the inner ball to be greater than the buoyancy of a vacuum environment, enabling the inner ball to descend, enabling the stratosphere to be in a vacuum state after the simulated sounding balloon ascends to the stratosphere, enabling the sounding balloon not to ascend any more and starting to float flatly.

The invention belongs to the technical field of nuclear fuel manufacturing, and particularly relates to a helium pressure measuring device for puncturing a fuel rod. Comprising a body, a first channel and a second channel are formed in the body, a gap is formed between the first channel and the second channel, a balance hole is formed in the gap, the end of the second channel is connected with a sealing cover, a balance chamber is formed between the sealing cover and the second channel, a hole channel is formed in the side wall face of the body, and a sealing ring is arranged in the first channel in the body. The sealing head is connected with the channel of the body and abuts against the sealing ring, a through hole is formed in the sealing head, the fuel rod can penetrate through the through hole of the sealing head to be inserted into the first channel of the body, and the side face of the body is connected with a puncturing mechanism. The device has the advantages that a double-chamber structure is adopted, the two chambers are connected, one chamber is connected with the pressure gauge, and the other chamber is connected with the pricking needle and the fuel rod.

The invention relates to the technical field of semiconductor manufacturing and detection, and discloses a high-precision helium pressure leak detection device for a vehicle gauge chip, the high-precision helium pressure leak detection device comprises a device housing, a pressure tank used for helium pressure detection is fixed in the device housing, and a helium pressure process operation panel is fixedly arranged on the device housing. The parameter setting module is used for setting different helium pressure process parameters; a helium pressure sensor is fixedly arranged on the equipment shell and used for detecting the input helium pressure in the pressurizing tank, and a vacuum tank is further fixedly arranged in the equipment shell and used for conducting vacuumizing leakage detection on the automobile gauge chip. According to the high-precision helium pressure leakage detection device and method for the vehicle gauge chip, the device is simplified, helium pressure and leakage detection are arranged in one device, the occupied area is compressed, an existing leakage detection technology is not affected, meanwhile, the needed pressure can be automatically set, the automation characteristic is better, and the detection efficiency is improved. And the pressure required by the helium pressing process can be automatically set and adjusted, and the requirements of equipment required by semiconductor production are met.

The invention discloses a method and a system for automatically reducing carrier gas consumption of a gas chromatograph through a DCS (Distributed Control System), aiming at the problem of poor effect of the existing method for reducing helium consumption, the carrier gas consumption of the gas chromatograph is automatically reduced by modifying a carrier gas supply path of the gas chromatograph, adding an electromagnetic valve and a logic program for controlling the electromagnetic valve to automatically switch, and automatically switching a double-pressure gas supply mode through the DCS. In a standby state, the helium pressure is reduced from 600 kPa to 200 kPa, so that the total carrier gas consumption is reduced to 30% of that of a traditional mode, and the expensive helium cost is remarkably saved; meanwhile, the continuous supply of the carrier gas avoids the risks of dry burning of a purifier, pollution of a detector and baseline drift caused by a traditional power-off and gas-off mode, the equipment safety and the detection precision are guaranteed, and frequent purging verification is not needed; the system realizes intelligent identification of the working state and automatic switching of the electromagnetic valve, improves the automation level and the operation continuity, can respond to the high-frequency detection requirement under the abnormal working condition at any time, and has remarkable economic benefits and industrial application value.

A superconducting machine system includes a superconducting electric machine. The superconducting machine system also includes a freezing container. The freezing container surrounds the superconducting machine. The superconducting machine system also includes a vacuum vessel wall surrounding the freezing vessel. The superconducting machine system even further includes a cryocooler coupled to the vacuum vessel wall, where the cryocooler is configured to cool the superconducting electric machine. The superconducting machine system also includes a system configured to remove helium gas from within the cryocooler housing when the cryocooler is switched to the non-operating state to reduce helium gas pressure within the cryocooler to minimize parasitic thermal load generated when the cryocooler is switched from the operating state to the non-operating state.

The utility model belongs to the field of protection devices, and particularly relates to a small-section direct-current copper conductor tester, which aims at solving the existing problems and adopts the following scheme that the small-section direct-current copper conductor tester comprises two bases which are symmetrically arranged, supporting seats are fixedly mounted at the tops of the two bases, and a same tester body is fixedly mounted at the tops of the two supporting seats; the tester body is provided with a control system, one side of the tester body is fixedly provided with a connecting plate, the connecting plate is provided with a wireless mouse, the mouse is matched with the control system, the tester body is provided with a fixing cavity, one side of the tester body is provided with an electronic scale, the electronic scale is provided with a sample box, and the sample box is provided with a sample box. A sample and an exhaust fan are arranged in the sample box, a PU gas path pipe is arranged on the exhaust fan, one end of the PU gas path pipe extends into the fixed cavity and is provided with a plurality of helium pressure reducing valves, and a helium box is arranged in the fixed cavity. The density tester is simple in structure and convenient to use, and people can conveniently test the density of a sample.

The invention relates to the field of fuel rods, in particular to a preparation and verification method of a standard rod for helium pressure nondestructive testing. The method comprises the steps that under the same standard temperature environment temperature, in the welding process, nitrogen is filled, meanwhile, nitrogen pressure is corrected, and standard rods of three specifications are prepared and formed; the appearance is checked; calibrating the standard rod in a stable environment; and the verification confidence coefficient is 0.95. According to the preparation method, calibration is carried out synchronously, and the calibrated standard rod can be matched with helium pressure nondestructive testing equipment, so that subsequent helium pressure nondestructive testing is facilitated.

This invention provides an electrostatic chuck and a semiconductor device. The electrostatic chuck includes an electrostatic adsorption module and a gas distribution module. The electrostatic adsorption module includes n adsorption areas, each with m helium gas outlets. The gas distribution module includes n gas distribution units corresponding to the n adsorption areas. The gas distribution module includes a helium gas pipeline, a pressure detection unit, a temperature detection unit, and a temperature control unit. The pressure detection unit acquires the helium pressure P in the adsorption area and determines whether the wafer has warped based on P, and identifies the warping location if warping occurs. The temperature detection unit acquires the temperature T at the wafer warping location. The temperature control unit adjusts the helium temperature in the helium gas pipeline according to T and a preset temperature range, ensuring that T is within the preset temperature range. This allows for more precise temperature control by using helium to assist in adjusting the wafer surface temperature.