289 results about "Gas expansion" patented technology

The invention discloses a combustion chamber and turbine guider integrated composite flow channel outlet flow field uniformity evaluation method, and belongs to the technical field of gas turbine pneumatic design. The method comprises the steps that a geometric model of a combustion chamber and turbine guider integrated composite flow channel is built, a combustion chamber function section and a guider pneumatic section are fused through integral pneumatic modeling to form a continuous flow channel, a front section adopts a diffusion structure to form a low-speed combustion area, and a rear section adopts a gradually-shrinking channel to achieve gas accelerated expansion; performing three-dimensional cold-state flow field numerical simulation by adopting a structured grid division and delay separation vortex simulation technology; flow parameters including total pressure, Mach number, airflow angle and vorticity are extracted from the cross section of a flow channel outlet, conversion from a Cartesian coordinate system to a polar coordinate system is carried out, and a uniformly distributed aerodynamic parameter field is reconstructed by using an interpolation algorithm; the directional coupling degree is calculated based on the spatial correlation of the pressure gradient vector and the vorticity vector, and the vortex-pressure coupling entropy production index representing the overall aerodynamic loss of the flow channel is established in combination with the pressure pulsation intensity and the vorticity concentration ratio. According to the method, a three-dimensional evaluation system is constructed by integrating circumferential and radial non-uniformity and entropy production parameters, and accurate quantitative evaluation of flow characteristics and uniformity of the combustion chamber and turbine integrated structure is realized.

The invention provides a water-ice separation device for cathode tail exhaust for a fuel cell, which comprises a device body, the device body is provided with an inner cavity, the inner cavity is provided with a cathode tail exhaust mixed gas inlet and a mixed gas outlet at two opposite sides of the device body respectively, and the inner cavity is provided with a water / ice outlet at the bottom of the device body; the inner cavity is provided with a spiral separation rotating rod which extends from the cathode tail gas mixed gas inlet to the mixed gas outlet, and the spiral separation rotating rod is provided with a spiral separation blocking piece. Water and / or ice in the cathode tail gas are / is better separated by arranging multi-stage rotational flow, the water and / or ice in the cathode tail gas under the gravity action and the centrifugal action are / is collected and separated by arranging a scattering control filter screen and a flow accumulation filter screen, only gas enters the expansion machine, blades of a rotational flow turbine of the expansion machine are not impacted by the water and / or the ice, and the water and / or the ice in the cathode tail gas are / is separated. The efficiency of the expander is increased and power consumption is reduced.

The hot gas bulging forming system comprises a pipe bending device, a feeding device, a pre-forming device, a heating device, a bulging quenching device and a discharging device which are sequentially arranged, the heating device comprises a heating cavity, and an electrode chuck used for clamping the end of a metal pipe is arranged in the heating cavity; the electrode chuck is connected with an IGBT induction heating device, an infrared thermometer is arranged in the heating cavity, and the infrared thermometer and the IGBT induction heating device are both in communication connection with a controller. According to the hot air bulging forming system, materials with different thicknesses and pipes with complex shapes can be conveniently heated, the heating rate of the materials with different coatings can be adjusted through the controller according to coating characteristics, accordingly, the coatings are protected to the maximum extent, the better product surface quality is obtained, the application range is wide, the heating speed is high, and the production efficiency is high. And the heating efficiency is greatly improved. The invention further discloses a hot gas bulging forming method.

The invention relates to the technical field of energy storage, in particular to an energy storage system and a heat storage and temperature adjustment method of the energy storage system. The energy storage system comprises a gas storage, a gas compression device and a gas expansion device; the gas storage is coupled with a first heat storage device, at least one part of the first heat storage device is arranged in the gas storage, and the first heat storage device exchanges heat with a gas medium in the gas storage; the gas compression device is connected with a gas inlet of the gas storage; the gas expansion device is connected with a gas outlet of the gas storage; when the gas medium enters the gas storage, the gas medium in the gas storage exchanges heat with the first heat storage device, so that the temperature of the gas medium is reduced; and when the gas medium is discharged out of the gas storage, the gas medium in the gas storage exchanges heat with the first heat storage device, so that the temperature of the gas medium rises.

The invention belongs to the technical field of waterproof cutting lamps, and discloses a waterproof cutting lamp for stage atmosphere treatment, which comprises a base, the top end of the base is rotatably connected with a rotating seat, the interior of the rotating seat is rotatably connected with a waterproof cutting lamp body, and the outer side of the waterproof cutting lamp body is provided with a sealing cover through a screw. A waterproof groove is formed in the edge of the inner wall of the sealing cover, a sealing gasket is arranged on the inner wall of the waterproof groove, bonding pieces are bonded to the two sides of the sealing gasket and bonded to the interior of the sealing cover, a lifting strip is vertically and movably connected to the interior of the sealing cover, and a pressing plate is vertically and movably connected to the middle of the lifting strip. The two sides of the lifting strip are movably connected with side pressing plates in the inclined direction, the sealing cover is tightly matched with the waterproof cutting lamp body, the inner pressing plate, the side pressing plates and other components work cooperatively, water invasion is effectively prevented, it is ensured that equipment stably operates in the humid environment, the sealing effect is further enhanced through gas flowing and an extrusion mechanism, and the service life of the equipment is prolonged. And meanwhile, the waterproof reliability is improved by utilizing a gas expansion principle.

The invention relates to the technical field of novel energy, in particular to a compressed air energy storage system comprising a combined storage tank and a control method thereof.The compressed air energy storage system comprises a compressor used for compressing air and a heat exchanger used for conveying a heat exchange medium and conducting heat exchange with the compressed air; the heat storage tank is used for storing heat generated in the heat exchange process of the heat exchange medium and the compressed air; the turbine is used for carrying out gas expansion on the compressed air subjected to heat exchange and releasing heat energy; and the combined storage tank is used for storing the cooled compressed air subjected to heat exchange with the heat exchange medium and the cooled heat exchange medium subjected to heat exchange with the compressed air. Compressed air and space can be fully utilized through the combined storage tank, meanwhile, the compression efficiency and stability of the compressor and the power capability of the compressed air of the system in the turbine expansion stage can be improved through the arrangement method of the vertical positions of the heat storage tank and the combined storage tank, and therefore the higher operation efficiency of the compressed air energy storage system is achieved.

The utility model discloses a filling pipeline pressure releasing and maintaining stable conveying device which comprises a pressure maintaining device, a pressure releasing device and a pneumatic valve, and particularly comprises a high-pressure plunger pump, the pneumatic valve, a pressure releasing valve and a one-way valve device. Wherein a high-pressure plunger pump is adopted in the pressure maintaining device, pressure oil serves as a pressure source, an air pressure type pressure relief device is adopted in the pressure relief device, according to the air expansion principle, when the pressure exceeds a preset value, air expands to push the device to be started, a one-way valve is arranged in the pressure relief device, and a pneumatic valve is additionally arranged; the method is used for controlling stable conveying of gas in the filling pipeline. According to the structure, through function linkage of the pressure relief device and the pressure maintaining device, stability of slurry conveying is guaranteed, the serious problems of pipeline abrasion, pipe blockage and pipe explosion in the conveying process are avoided, the phenomenon of uneven filling slurry and the safety accident problem are avoided, and the mine production efficiency and safety are improved.

A compressed gas energy storage system which can also store thermal energy. The storage system can have a surface subsystem, a geological heat storage subsystem, and a compressed gas storage subsystem. The surface subsystem can comprise gas compression, gas expansion, and heat exchange functions. The geological heat storage subsystem can comprise a cold and hot zone in fluid communication with the surface subsystem. The compressed gas storage subsystem can also be in fluid communication with the surface subsystem. The systems and methods can be implemented in porous rock formations. This allows for the use of extremely large, natural formations rather than man-made salt caverns, as is the current state of the art. Existing wells drilled by oil and gas producers can be utilized, thereby drastically reducing cost and time for implementation. Further, use of sub-surface thermal management provides a complete solution for long term energy storage at high efficiency.

The invention relates to the technical field of compressed air energy storage, in particular to an industrial waste heat coupling isothermal non-afterburning compressed air energy storage system which comprises an isothermal compression energy storage module, an isothermal compression heat recovery module, an industrial waste heat conversion module and an expansion power generation module. The isothermal compression energy storage module achieves multi-section compression of air and stores compressed air through electric energy in the valley period, and the isothermal compression heat recovery module is used for collecting compression heat generated by the isothermal compression energy storage module during multi-section compression of the air. The expansion power generation module receives the industrial waste heat stored by the industrial waste heat conversion module and is used for compressed gas expansion power generation; the isothermal compressor technology is adopted for compressing air, the compressed air energy storage efficiency is improved, the compression power consumption is reduced, meanwhile, industrial waste heat is fully utilized for heating the compressed air in the expansion stage, the problem that compression heat is insufficient in the isothermal compression process is solved, and the energy storage efficiency and the energy-saving effect are higher.

The invention relates to the technical field of soil and groundwater pollution remediation, in particular to a polluted groundwater source controlling and breaking system suitable for limited space of an industrial accumulation area, which comprises a main well, a gas stripping circulating unit and a groundwater circulating unit. A blocking device composed of a packing rubber structure and a driving device is arranged in the main well, the packing rubber structure is driven by the driving device to move and intermittently inject air to expand, and an air flow channel which is dynamically opened and closed is formed between the inner wall of the main well and the unsaturated area. The vacuum pump device builds negative pressure on the upper portion of the main well, so that purified clean gas enters an unsaturated area in an intermittent pulse mode through the peripheral injection well, and soil gas is induced to flow in an oscillating mode under cooperation of the dynamic gas flow channel. Groundwater extracted by the centrifugal pump is purified by the gas stripping area and the underground activated carbon filtering device and then is discharged into the top of the unsaturated area through the drainage device in an intermittent wave mode, the system is suitable for pollution treatment in the limited space of the industrial accumulation area, and targeted source control and long-acting reduction are achieved.

The subject matter of this specification can be embodied in, among other things, a subsea energy recovery system for generating electric power that includes an inlet flow line configured to couple to a subsea tree of a subsea gas well to receive gas produced from the subsea gas well, and a subsea electric power generation system, the subsea electric power generation system configured to reside subsea on a subsea production site of the subsea gas well and including a turbine wheel configured to rotate in response to expansion of the gas, a rotor configured to rotate with the turbine wheel, a stationary electric stator, the rotor and electric stator defining an electric generator configured to generate current, and a hermetically sealed housing enclosing the turbine wheel, the rotor, and the electric stator and hermetically sealed inline in the first flow line.

The invention discloses a gas-liquid separation device for a salt cavern compression energy storage system, which comprises a dehumidification rotary cabin, an acceleration rotary cabin, a centrifugal assembly and an acceleration assembly, the centrifugal assembly and the acceleration assembly are respectively positioned in the dehumidification rotary cabin and the acceleration rotary cabin, and the bottom end of the acceleration rotary cabin is fixedly connected with a gas expansion cover for communicating with the top end of the dehumidification rotary cabin; a cyclone disc cabin is fixedly installed at the top end of the acceleration rotating cabin, a flow guide inner pipe is fixedly installed on the inner side of the acceleration rotating cabin, the acceleration assembly comprises a driving disc and an acceleration impeller, the driving disc is fixed to the surface of the flow guide inner pipe and used for driving the acceleration impeller to rotate, and a main shaft is arranged at the axis of the acceleration impeller. According to the invention, by separately arranging the structures of the dehumidification rotary cabin and the acceleration rotary cabin, under the boosting effect of the acceleration assembly in the acceleration rotary cabin, the salt-cavern compression energy storage working medium airflow swirling and acceleration are performed, so that the airflow is introduced into the dehumidification rotary cabin at a high speed, the airflow movement rate is increased, and the high-speed centrifugal effect is generated; and the working effect of gas-liquid treatment is improved.

The embodiment of the invention provides an environment-friendly gas insulation ring main unit, and relates to the technical field of ring main units. The environment-friendly gas insulation ring main unit comprises a cabinet body, a cooling assembly and an air pressure balance assembly. An insulating chamber is arranged in the lining box; the liquid outlet end of the circulating pump is connected with one end of the heat conduction pipe, and the other end of the heat conduction pipe is connected with the liquid inlet of the container; a supporting block is installed in the piston cylinder through a supporting structure, the lower end of the spring is connected with the supporting block, and the upper end of the spring is connected with the piston. The pressure reducing and stabilizing device plays a role in reducing and stabilizing the pressure in the insulation chamber, so that the pressure in the insulation chamber is kept stable, the phenomena that the cabinet body of the insulation chamber is deformed due to gas expansion and the sealing and the structural safety of the insulation chamber are influenced are avoided, and meanwhile, when arcing faults such as improper inflation and misoperation occur, the impact generated by instantaneous pressure increase generated by detonation can be buffered, and the service life of the insulation chamber is prolonged. Therefore, the cabinet body is protected, and subsequent use of the cabinet body is prevented from being affected.

The invention belongs to the technical field of material forming and manufacturing, and discloses a hot gas expansion-explosion composite forming method for forming a complex deep-cavity thin-wall component. According to the hot air expansion-explosion composite forming method, a mold unit, an air pressure loading unit and an explosion unit are needed; the method comprises the following steps: mold preheating; feeding and die assembly are carried out; compressed air is filled, and pre-expansion is carried out; fuel is sprayed, and explosion forming is conducted; releasing pressure; and opening the mold and taking the part. The method has the advantages that hot gas bulging forming utilizes metal high-temperature plasticity and evenly-distributed flexible air pressure loading, and the plate forming performance is improved; explosive forming has a very high deformation rate, high plastic deformation can be achieved within a very short time, and the forming performance of the plate can be further improved through the combined action of the strain rate effect and the inertia force. According to the method, the plastic deformation capacity of the material can be remarkably improved by combining the two, and forming of the complex deep-cavity thin-wall component is facilitated.

The invention relates to the technical field of dryers, in particular to a heater-free efficient cold-drying adsorption type dryer and a drying method.The efficient cold-drying adsorption type dryer comprises a heat exchange system and two drying towers, the two drying towers are connected in parallel through a connecting pipeline, and the heat exchange system comprises a heating cylinder and a cooling cylinder; heat exchangers are arranged in the heating cylinder and the cooling cylinder, the two heat exchangers are connected in series through a heat exchange pipeline, a compressor and an expansion joint are arranged on the heat exchange pipeline, the compressor is used for compressing a refrigerant in the heat exchange pipeline into high-temperature and high-pressure gas from low-temperature and low-pressure gas, and the expansion joint is used for converting normal-temperature and high-pressure liquid into low-temperature and low-pressure liquid; and the heat exchanger in the heating cylinder radiates heat to heat the dried compressed air, and the heat exchanger in the cooling cylinder absorbs heat to refrigerate the to-be-dried compressed air. The heating energy efficiency ratio of the compressor is about 1: 3, and compared with a heater, a large amount of heating energy consumption can be saved.

The invention relates to the technical field of fuel tank structures, and particularly discloses a fuel tank assembly meeting emission requirements in a liquid level sealing mode. The oil filling pipeline is arranged on the side wall of the tank body, the oil inlet end of the oil filling pipeline extends out of the tank body and can be matched with an oil filling gun, the oil outlet end of the oil filling pipeline extends into the bottom of the tank body and is provided with a one-way valve, and the horizontal position of the oil outlet end of the one-way valve is lower than the liquid level of gasoline in the tank body. By means of the arrangement mode that the gasoline liquid level in the fuel tank is higher than the fuel outlet end of the one-way valve, the gasoline liquid level plays a role in sealing the fuel outlet end of the one-way valve, and therefore oil gas volatilization caused by fuel gas expansion in the fuel tank due to the temperature of the outside in the running process of an automobile is reduced, and the purpose of meeting the national sixth emission standard of the current automobile is achieved. Compared with a traditional mechanical sealing valve, the mechanical sealing valve is lower in cost and easier to overhaul and maintain.

The invention relates to the technical field of automobile detection, and discloses an active temperature OBD fuel oil detection system which comprises a valve control module, a thermodynamic excitation module, a multi-source sensing module, a diagnostic logic module and an OBD communication module. By arranging a thermodynamic compensation end, when the sealing performance of the fuel system is detected, differential detection parameters are intelligently set according to different environment temperatures by constructing a temperature self-adaptive pressure regulation and control mechanism. When encountering a low-temperature environment, the system automatically increases the target pressure value, prolongs the heating time, and improves the gas expansion efficiency. The technology can eliminate the interference of the environment temperature change on the detection process, so that the pressure establishment process under various weather conditions is kept highly consistent, the accuracy of leakage judgment is ensured, the misjudgment risk of micropore leakage is reduced, and by arranging a reference calibration end, when detection is started each time, a sensor closed-loop self-calibration process is executed, so that the detection accuracy is improved. Systematic deviation caused by standard misalignment is solved, and the overall misjudgment rate is reduced.

The invention provides a hollow pipe fitting forming device and method. The hollow pipe fitting forming device comprises a heating mechanism, a bulging quenching mold and an air source mechanism. The heating mechanism comprises a roller hearth furnace provided with a conveying roller way, a furnace body is sequentially provided with a feeding isolation chamber, a heating chamber and a discharging isolation chamber in the length direction, all the chambers are isolated from one another and communicated with a protective atmosphere system, and the chambers are used for introducing dry air or inert gas into the furnace body and maintaining the dew point temperature below-15 DEG C; hydrogen adsorption on the surface of the hollow pipe blank is effectively inhibited, and the hydrogen embrittlement risk is reduced. After a pipe blank is heated at a high temperature, austenitizing of a material structure is achieved, then the pipe blank is rapidly transferred to a bulging quenching die, gas expansion deformation occurs in a die cavity under the action of set air pressure, the hollow pipe fitting is formed by attaching the die wall, meanwhile, the hollow pipe fitting attached to the die cavity is synchronously cooled through a cooling assembly in the die, and quenching treatment is achieved. The material structure is converted into martensite, and the mechanical property of a formed part is improved.

The invention discloses a transformer with an anti-explosion protection structure, the transformer comprises a transformer body and an exhaust pipe with a pressure release valve, the exhaust pipe is arranged on the transformer body, the transformer body is provided with a gas breathing assembly, a cooling covering assembly and an oil liquid breathing assembly, and the invention relates to the technical field of oil-immersed transformers. According to the transformer with the anti-explosion protection structure, through arrangement of the oil liquid breathing assembly, an expansion space is provided for oil liquid, and through cooperation of arrangement of the elastic plugging piece, expansion of the oil liquid under different pressure gradients is achieved, the anti-explosion strength of the transformer body is improved, and through position changes of the U-shaped lap joint frame, the anti-explosion performance of the transformer body is improved. And meanwhile, four trigger switches are arranged, the blowing speed of the cooling fan is controlled when the interior of the transformer body is in different pressure environments, the energy-saving advantage is achieved, the cooling speed of the transformer body is increased, the gas expansion condition is relieved, and the explosion-proof strength is further improved.

The application discloses a kind of mixed nitrate class molten salt preparation device, it is related to molten salt preparation technical field, including jar body, the jar body is rotatably connected with rotating pipe, rotating pipe is fixedly connected with two fixed rods, further include: mixing mechanism.The application is expanded by the setting of scraping unit, inert gas in gas storage tank is expanded under the action of high temperature, gas expansion drives by rotating pipe into two installation cylinder, and drives two first sliding piston rod to move outward, first sliding piston rod moves and drives fixed frame to move, fixed frame moves and drives movable pipe and scraper to move, so that scraper is contacted with jar body inner wall, and the inner wall of jar body is scraped, movable pipe moves and drives rotating ring to rotate by connecting block, connecting rod and fixed block, rotating ring rotates and drives two baffle one to rotate, so that the area of two feed ports is increased, and then the feeding amount is increased, thereby adaptively increase the turnover amount, improve the uniform heating effect of material.

The utility model discloses a convenient connecting device for a gas meter and a gas pipeline, which belongs to the technical field of gas engineering and comprises a connecting pipe, the gas meter, the gas pipeline and a connecting sleeve, a fixing ring is fixedly connected to the center of the connecting pipe, and a group of first threaded holes distributed in an annular array are formed in each of the left end and the right end of the connecting pipe. A set of second threaded holes distributed in an annular array are formed in the connecting sleeve, matched positioning pins are jointly installed in the first threaded holes and the second threaded holes, an annular groove is formed in the connecting sleeve, an outer sealing ring is fixedly connected in the annular groove, and double sealing is achieved through a first elastic sealing ring and a second elastic sealing ring. The first elastic sealing ring conducts internal sealing on the connecting position through the elastic force of the compression spring, the second elastic sealing ring conducts external sealing through gas expansion of the annular elastic gas bag, the double-sealing design greatly improves the connecting sealing performance, and the gas leakage risk is effectively avoided; and safe and stable operation of the gas supply system is ensured.

The invention relates to the technical field of underground tools, in particular to a pressure control suction type underground PVT sampler and an underground PVT sampling method.The pressure control suction type underground PVT sampler comprises an upper connector, a control cylinder, a control head, a connector, an outer sleeve, a liquid storage cylinder, a throttling short section, a sampling cylinder, an inflow short section, a sealing short section and a lower connector, and the control cylinder is fixedly installed on the inner side of the lower end of the upper connector; the method comprises the following steps: (1) before an instrument enters a well, firstly testing the flow pressure of underground fluid, and debugging an initial pressure value in a pressure control section according to a flow pressure value of an underground sampling point; the device is reasonable and compact in structure and ingenious in conception, the sampling action of the sampler is controlled through the principle that water vapor expands after being heated, precise mechanical mechanisms such as electronic components and a clock are not arranged, the starting shear value is set according to the underground temperature, so that the starting action of the sampler is controlled, the higher the temperature is, the easier the sampling is, and due to the fact that under a certain volume, the sampling effect is good. The higher the temperature is, the larger the gas expansion is, the higher the pressure is, the larger the shearing force is, and the device has the characteristics of rapidness, stability and high efficiency.

The utility model discloses a waste discharge adhesive tape winding mechanism and a GDL cutting forming device. The waste discharge adhesive tape winding mechanism comprises a fixing frame, a winding assembly and a broken tape detection assembly. The winding assembly comprises an air swelling shaft, a winding torque motor and a plurality of winding units, the winding torque motor is hung below the fixing frame, one end of the air swelling shaft is connected with the winding torque motor, and the air swelling shaft is sleeved with the winding units; the winding unit comprises an assembly inner ring, an assembly outer ring, a friction plate and a plurality of adjusting screws, the assembly inner ring is sleeved and fixed on the air expansion shaft, the assembly outer ring is sleeved on the assembly inner ring, a ball bearing is arranged between the assembly outer ring and the assembly inner ring, the friction plate is sleeved on the air expansion shaft, and the adjusting screws are arranged on the air expansion shaft. The friction plate is arranged in the assembling inner ring and attached to one side of the assembling inner ring and one side of the assembling outer ring, and the adjusting screw penetrates through the friction plate and is embedded into the assembling inner ring. According to the utility model, the winding efficiency of the waste discharge adhesive tape is effectively improved.

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.

The invention discloses a green pressure relief method for mine pressure display caused by multi-coal-seam mining remaining coal pillars, and belongs to the technical field of multi-coal-seam mining. According to the invention, through an intelligent decision-making system of multi-source data fusion, the problem of response lag of a traditional method is solved; a coupling technology of supercritical CO2 gas expansion pressure relief and a biodegradation hydraulic fracturing technology is adopted, low pollution and coal pillar structure protection in the pressure relief process are achieved, through a whole-process closed loop of'monitoring-prediction-decision-verification ', the problem of multi-coal-seam stress superposition control is solved, and the stability of the pressure relief process is improved. The method is especially suitable for a complex geological environment with mine pressure appearing caused by multi-coal-seam superposition mining.

The invention provides a high-pressure gas membrane rupture pressure measuring device and a measuring method thereof, and belongs to the technical field of pressure measurement. The measuring device comprises a pressure generation system, a gas compression system, a gas injection system, a pressure measuring system and a diaphragm clamping system. The piston divides the cavity into a hydraulic cavity and a gas compression cavity, and the piston is hydraulically driven to compress the pre-filled gas, so that the diaphragm is broken. The pressure measurement system records pressure-time data in real time, and a sliding window average algorithm is adopted to extract a membrane rupture pressure peak value. According to the technical scheme, inert gas is used, initiating explosive devices are not used, membrane rupture energy is only gas expansion, the protection box can absorb fragments, and explosion-proof transformation is not needed in a laboratory. And the smoothed unique membrane rupture pressure value is output through a sliding window averaging algorithm, and manual reading errors are eliminated. According to the technical scheme, the device is compact in structure, safe to operate, rapid in testing and suitable for accurately measuring the diaphragm rupture pressure of the gas gun diaphragm in a conventional laboratory.

A combined heat and power (CHP) system and a method of operating is provided. The CHP system includes an oxygen-air separation device. A combustion chamber has an inlet coupled to the oxygen-air separation device. The combustion chamber receives an expanded heated CO2 working gas for combustion of solid fuel and generates a CO2 exhaust gas. The expanded heated CO2 working gas comprising at least a portion of the CO2 exhaust gas. A heat exchanger receives combustion gases and outputs a cooled CO2 working gas. A turbine is provided having a compression section and an expansion section, the compression section configured to receive and compress the cooled CO2 working gas and to direct it to the heat exchanger. The turbine receives a heated CO2 working gas at the expansion section and expands the heated CO2 working gas. In an embodiment, CO2 products may be generated from the system.

The invention relates to a small-load pneumatic ejection separation test platform and a speed projection engineering estimation method. The test platform is composed of an air compressor, a high-pressure gas cylinder, an electromagnetic valve, a pressure gauge, a mounting rack, an ejection cylinder, a piston, a high-speed camera, a grid background plate, an irradiation lamp, a protection pad and other components. The air compressor is used for providing high-pressure gas required by the ejection system; the high-pressure gas cylinder is used for storing high-pressure gas required by system ejection; the electromagnetic valve is used for controlling the ejection device to start; the pressure gauge is used for measuring gas pressure in the gas cylinder; the ejection cylinder is used for providing a space required by high-pressure gas expansion and a track required by object ejection; the piston is used for converting aerodynamic force into thrust to provide acceleration for a separated object; the grid background plate is used for determining the position of the isolate shadow; and the irradiation lamp is used for irradiating the separated object and projecting a shadow on the square background plate. The device has the advantages of being safe in experiment, easy to install, convenient to recycle, convenient to maintain and capable of repeating the experiment.

The utility model discloses a kind of anti-permeation moisture-proof structures of building wall, comprising: wall, the outside of the wall is fixedly connected with adhesive layer, the outside of the adhesive layer is fixedly connected with moisture-proof layer, the outside of the moisture-proof layer is fixedly connected with waterproof finish layer;Drying assembly.The utility model, when daily use, moisture-proof layer can absorb the moisture of wall outside, ensure that wall outside always keeps dry state so that moisture is absorbed by moisture-proof layer, in sunny day, heat of illumination can be absorbed by heat-absorbing plate, finally heat is transferred to radiating wire by heat-conducting plate, finally radiating wire radiates heat to make moisture in moisture-proof layer evaporate dry, when moisture in moisture-proof layer evaporates and gasifies expansion, gas will flow out from air hole, gas expansion will pressurize plugging plate in process, synchronously make that slide pole and plugging plate extend outward, so that gas passes through air plate and discharges, further improve the effect of moisture-proof.

The present invention relates to the field of refrigeration, and in particular to a wheel cover assembly, an expander, and an air cycle machine. The wheel cover assembly comprises a housing, the housing being provided with an air inlet and an air outlet; a wheel cover, a gas flow channel surrounding the wheel cover being formed between the outer wall surface of the wheel cover and the inner wall surface of the housing, the gas flow channel being connected to both the air inlet and the air outlet, the air inlet being used to introduce gas; when gas is introduced through the air inlet, the gas flows along the gas flow channel, exchanges heat with the wheel cover, and is discharged through the air outlet; when the temperature of the gas filled in the gas flow channel is higher than the temperature of the impeller, the wheel cover can radiate the heat of the absorbed gas to the impeller to prevent the impeller of the expander from being frozen by the low-temperature gas after the gas expands and performs work.