131results about How to "Wide pressure range" patented technology

A radio frequency (RF) coaxial resonator feeding a saltshaker-like gas distributing electrode assembly forms a capacitively coupled plasma source. This apparatus can generate plasma of high density over a wide pressure range and large process window. The system may be used as a remote radical-rich plasma source for materials surface processing.

A plasma reactor for processing a workpiece includes a reactor chamber, an electrostatic chuck within the chamber for supporting a workpiece, an RF plasma bias power generator coupled to apply RF power to the electrostatic chuck and a refrigeration loop having an evaporator inside the electrostatic chuck with a refrigerant inlet and a refrigerant outlet. Preferably, the evaporator includes a meandering passageway distributed in a plane beneath a top surface of the electrostatic chuck. Preferably, refrigerant within the evaporator is apportioned between a vapor phase and a liquid phase. As a result, heat transfer between the electrostatic chuck and the refrigerant within the evaporator is a constant-temperature process. This feature improves uniformity of temperature distribution across a diameter of the electrostatic chuck.

The invention relates to a synthetic method of cubic boron nitride; the method adopts the nitride of alkali metals and alkaline earth metals and the mixture of magnesium aluminum alloy as a catalyst and uses the hexagonal boron nitride as material; the nitride, the magnesium aluminum alloy and the hexagonal boron nitride are evenly mixed according to the mass ratio of 7 to 10 : 1 to 4 : 100 and the single crystal of the cubic boron nitride with the amber color from semitransparent to transparent is synthesized according to the synthetic technique processes of the invention. The method overcomes the defects that the nitride and the metal catalyst material are used separately, and leads the advantages of the two catalyst materials to have good combination; the synthesized cubic boron nitride crystal has the advantages of amber color, regular shape, proper intensity, synthetic temperature, wide pressure range and high yield, etc.

A nozzle for use in cleaning applications is provided. The nozzle has a rotatably supported nozzle body, on which one or more nozzle orifices are provided. The nozzle housing itself serves as the rotary drive, which is carried along by a fluid led into the housing with torque. In order to stabilize the drive action, at least one braking device is provided on the nozzle which generates a braking torque by fluid action, preferably through the recoil on a nozzle opening.

The invention relates to a pressure-adjustable spring compression soldering welding device and method. The technical problem that the welding quality of a traditional high temperature superconductor strip connector is not stable can be solved. The pressure-adjustable spring compression soldering welding device comprises a heating plate, a connector pressing block, a connecting frame and a spring mechanism; and the spring mechanism comprises a pressing head, a spring, a pressing plate and a force application screw which are sequentially and fixedly connected from bottom to top, the force application screw is fixed to the top of the connecting frame, the heating plate is fixed to the inner side of the bottom of the connecting frame, and the connector pressing block is arranged between the spring mechanism and the heating plate. The pressure-adjustable spring compression soldering welding device is simple in structure, applied pressure is continuously adjustable, compression springs in different sizes are used, the wide pressure scope can be obtained, and the pressure-adjustable spring compression soldering welding device is suitable for welding occasions needing different pressures.

A fuel rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. This assembly comprises an elongated conduit having a longitudinal fuel passage therein, a fuel inlet pipe fixed to an end or a side of the conduit, and a plurality of branch pipes. The basal end of each branch pipe is adapted to communicate with the fuel passage. The distal end of each branch pipe is provide with a connecting member for connecting to a tip of a fuel injector. The wall of the conduit is provided with holes for receiving the basal ends of the branch pipes. Around each hole an inner collar and an outer collar are integrally formed with the conduit wall, and each branch pipe is fixed to the collars by brazing or welding. The drilling work is performed by a special drilling tool.

The invention discloses a high-pressure bidirectional miniature power-driven air pump which comprises a motor, an eccentric shaft, an oscillating bar, a pump body, a left cylinder body, a right cylinder body, a piston rod, and a one-way valve body and a cylinder cover connected with the two cylinder bodies, wherein the motor is fixed on the pump body, a motor shaft is connected with the eccentricshaft, a driving pin at one end of the eccentric shaft penetrates through one installation hole of the oscillating rod, the oscillating rod is connected on the piston rod arranged horizontally by a screw, sealing rings are arranged on two ends of the piston rod and stretch into the left and the right cylinder bodies respectively, and the two cylinder bodies are respectively arranged at two ends of the pump body. The power-driven air pump has the advantages of small volume, light weight, low power consumption, capacity of generating high pressure, wide pressure range, good starting performancewith pressure, and the like, and can satisfy the requirements of the industry on small flow and high pressure.

The invention discloses a graphene double-layer electroactive membrane and a preparation method thereof. The graphene double-layer electroactive membrane is composed of a flexible conducting layer anda flexible polymer layer. The preparation method comprises mixing and reacting flake graphite powder, NaNO3, sulfuric acid, KMnO4 and deionized water, and performing washing and drying processes to obtain graphene oxide; mixing and ultrasonic-dispersing the graphene oxide, hydrazine hydrate, ammonium hydroxide and deionized water for reaction to obtain reduced graphene oxide dispersion liquid; dropwise or rotatingly applying the reduced graphene oxide dispersion liquid onto a flexible polymer layer-polymer membrane and performing a drying process to form the flexible conducting layer onto thepolymer membrane to obtain the graphene double-layer electroactive membrane. The graphene double-layer electroactive membrane has the advantages of high responsiveness, low power, broad pressure range and the like when being electrically driven, and can be applied to the fields of flexible wearable equipment, micro motor actuators and micro-robots.

The invention relates to a detachable shell and tube heat exchanger, which comprises a shell layer, an upper tube plate, a lower tube plate and heat exchange tubes. The upper tube plate and the lower tube plate are arranged at the upper and lower ends of the shell layer respectively; the upper tube plate is provided with upper installation holes into which the heat exchange tubes are arranged; the lower tube plate is provided with lower installation holes into which the heat exchange tubes are arranged; the heat exchange tubes pass through the upper installation holes and the lower installation holes in turn and are arranged in the form of an array; annular grooves are formed in the upper installation holes and the lower installation holes; a seal ring is arranged in each annular groove; and the inner side face of the seal ring is pressed against the outer wall of each heat exchange tube. The detachable shell and tube heat exchanger effectively eliminates the influence of heat stress, has high material applicability, long service life and a wide application range and is convenient to maintain.

The invention provides an axial flow device comprising a shell and a transmission device. The shell is provided with the transmission device and is internally provided with a shell cavity; a vortex tube impeller is arranged in the shell cavity; the transmission device is connected with a vortex tube impeller; the vortex tube impeller is provided with a vortex tube which is provided with an impeller opening A and an impeller opening B and is internally provided with a wheel body, and the wheel body is provided with a guide blade; an inclined angle is formed between the guide blade and a rotating shaft of the vortex tube impeller; the guide blade is connected to the inner wall of the vortex tube; a shell cavity opening A is arranged at one end, which corresponds to the impeller opening A, of the shell cavity; and a shell cavity opening B is arranged at the other end of the shell cavity. The axial flow device is more energy-saving and can be used for pressurizing and conveying fluid. The axial flow device can serve as a water pump, vacuum equipment, air suction equipment, an air blower, a compressor, atomizing equipment, sprinkling equipment, a reactor, air blowing equipment, propelling equipment, a sewage processor, a dust remover, a dust collector, dressing equipment, a steam turbine, a water turbine, a wind turbine, a vortex pressurizing device utilizing residual heat of an engine, foam material manufacturing equipment, nano material manufacturing equipment and the like; and the axial flow device can be used for manufacturing a brand new foam material.

The present invention discloses a cleaner production method for synthetizing chloromethane. The method comprises the steps: 1), synthetizing chloromethane: synthetizing crude chloromethane from gas-phase hydrogen chloride and gas-phase methanol; 2), recovering waste heat: performing heat exchange on the crude chloromethane by a heat exchange device and liquid methanol, cooling and discharging, wherein liquid methanol is heated by the heat exchange device to form gas-phase methanol which enters the step 1) as a raw material to react; 3), deacidifying by a deacidifying tower: deacidifying the crude chloromethane; 4), refining in an absorption tower; 5), pressurizing, extracting, rectifying and removing ether; and 6) performing diluted acid solution membrane concentration. In the method, the pressure application ranges of the hydrogen chloride and the methanol are relatively wide, and the content of HCl in diluted acid solution is greatly reduced; the methanol is used as a washing solution, other secondary wastes can not be generated; raw materials, such as the methanol and HCl, are utilized to the greatest extent; the unit energy consumption of CH3Cl is greatly reduced, the unit energy consumption of a product, namely CH3Cl is reduced by more than 20% compared with that in an industrialized unit in the prior art.

An apparatus for abatement of gases is provided. The apparatus includes a toroidal plasma chamber having a plurality of inlets and an outlet, and at least one chamber wall. One or more magnetic cores are disposed relative to the toroidal plasma chamber. The plasma chamber confines a toroidal plasma. A second gas inlet is positioned on the toroidal plasma chamber between a first gas inlet and the gas outlet at a distance d from the gas outlet, such that a toroidal plasma channel volume between the first gas inlet and the second gas inlet in the is substantially filled by the inert gas, the distance d based on a desired residence time of the gas to be abated.

The invention relates to a roadway support structure capable of achieving multi-grade energy consumption collaborative yield and a splicing method. The roadway support structure is composed of a D-C shaped support, a D shaped connecting sleeve, a slidable groove-shaped friction energy consumption yield connecting piece and a low yield strength energy consumption yield steel block. In the yield energy consumption process, the defect that a traditional yield position is only limited at a node is overcome, and a stereoscopic and scientific multi-grade collaborative yield system composed of the low yield strength energy consumption yield steel block, an alloy spring inside the low yield strength energy consumption yield steel block and the slidable groove-shaped friction energy consumption yield connecting piece. The slidable groove-shaped friction energy consumption yield connecting piece arranged in the support overcomes the defects that a traditional support node is relatively weak in rigidity and small in yield range, the rigidity at the support node is strengthened, the yield range is wide, the yield amount is more sufficient, and the support structure is stabler. At the same time, the slidable groove-shaped friction energy consumption yield connecting piece can be recycled and reused.

A fine-grain material centrifugal filtering and dewatering device comprises a frame, a housing, a motor, a drum and a speed regulator. A spindle of the motor penetrates the bottom of the housing to be connected with the drum, the spindle penetrates the housing to be provided with a sealing component, the upper portion of the housing is provided with an upper housing cover, the lower portion of the housing is provided with a liquid discharge outlet, the side wall of the drum is provided with a plurality of filtrate holes, and filter medium is attached to the inner wall of the drum. The upper portion of the drum is provided with an upper drum cover, the housing is provided with a feed pipe penetrating the upper housing cover and the upper drum cover to enter the drum, a mechanical sealing component is arranged at an inlet of the upper drum cover, the feed pipe is respectively provided with a suspension liquid feed system and an air feed system through pipelines, and the pipelines are provided with flow control valves. By coordinating pressurized filtering and centrifugal filtering, filtering speed can be accelerated by centrifugal force, dewatering speed is accelerated by compressed air, therefore dewatering process of a centrifugal filter is enhanced, solid-liquid separation efficiency is improved, residual water in centrifugal filter cakes is reduced and centrifugal dewatering effect of fine-grain materials is improved.

A differential pressure sensor chip (4) comprises a diaphragm for measuring a differential pressure and converts a pressure received by the diaphragm for measuring the differential pressure into an electrical signal. A static pressure sensor chip (5) comprises a diaphragm for measuring a static pressure and converts a pressure received by the diaphragm for measuring the static pressure into an electrical signal. The differential pressure sensor chip (4) and static pressure sensor chip (5) are mounted on a header (1) so that one surface of the differential pressure sensor chip (4) and one surface of the static pressure sensor chip (5) are exposed to the interior of a common pressure introducing chamber (17).

The invention discloses a hydraulic fracturing crossing hole pitchup hole sealing method of a broken surrounding rock. A hole is drilled; a plastic casting is leaded into the drilled hole; a plastic air return pipe is leaded between the wall of the casing and the wall of the drilled hole; after cement slurry is injected into the casing, a concentric round hole is drilled in the step drilling place; the drilling length reaches a coal seam or top plate place; and the cement slurry is used for sealing by a three-section hole sealing process. The method overcomes the potential safety hazard caused by the leakage of fracturing fluid in no fracturing, and has the advantages of high hole sealing efficiency, good hole sealing effect, wide application range, wide pressure resistant range and recyclability.

The invention discloses a nitrogen safety valve used by a coalmine fully-mechanized mining hydraulic bracket. The nitrogen safety valve comprises a valve casing and a valve core, wherein the valve core is internally placed in a valve hole of the valve casing, unloading holes are formed in the outer walls of the valve core and the valve casing, one end of the valve casing is connected with an oil cylinder of the hydraulic bracket, the other end of the valve casing is connected with one end of a threaded sleeve, the other end of the threaded sleeve is closed, an oil inlet is formed in the valve casing, a gas storage cavity is formed in the threaded sleeve, nitrogen is stored in the gas storage cavity, the valve hole and the oil inlet are communicated with the gas storage cavity, and the valve core in the valve hole is reset under the action of the nitrogen in the gas storage cavity. Compared with the prior art, the nitrogen safety valve has the advantages that the properties of the nitrogen are fully utilized through the arrangement of the gas storage cavity storing the nitrogen on the safety valve, the safety valve is used in a wider range of pressure than a mode of adopting a spring in resetting, super-high pressure can be bore, the spring force is constant, and the size is small.

The invention discloses a hydraulic system for precisely arranging a stator shielding sleeve of a nuclear main pump in a gapless attachment way, and belongs to the field of nuclear power. The hydraulic system is used for realizing the precise arrangement of the stator shielding sleeve and a stator in a gapless plastic deformation attachment way. Compared with the prior art, the hydraulic system for precisely arranging the stator shielding sleeve of the nuclear main pump can realize repeated uniform loading and unloading along the long diameter direction of the stator according to bulging pressure and a loading path which are obtained by analysis on a process numerical value, thereby accurately controlling the plastic deformation of a material to realize the gapless plastic deformation attachment of the shielding sleeve. The system has a special gas exhaust part, so that gases can be effectively exhausted out of a sealed chamber; a proportional overflow valve is adopted by a booster part, and pressure is controlled to be output according to requirements by controlling the input current of the proportional overflow valve; due to the combination of a second gear pump and a booster, the upper limit of the pressure can be increased, and a wide pressure range can be obtained; and the pressure can be accurately controlled through an electronic control device such as a programmable logic controller (PLC) and a pressure transmitter.

The invention discloses a corona resistance testing device and method for varnished wires. The testing device comprises a consistent-temperature oven, an IGBT (Insulated Gate Bipolar Translator) system, a communication system, a control system and a power supply. During test, two pins of wire pairs are inserted in a sample socket in the consistent-temperature oven; the control system controls the work of the consistent-temperature oven and detects the working temperature of the oven in real time, and when a detected temperature reaches a set value, the control system controls the IGBT system to work; the IGBT system generates high-frequency voltage and applies the high-frequency voltage to the two varnished wire pairs to be tested in the consistent-temperature oven so as to conduct the test; the control system records testing time in real time, judges the breakdown time of the corona-resistant varnished wires according to the change of working signals of the IGBT system, and records the testing time and temperatures; and after the test is finished, the control system controls the consistent-temperature oven and the IGBT system to stop working. The testing device and method with the scheme provided by the invention have the advantages of stability, reliability, high testing efficiency, high precision, clearness and definition in display, and simplicity and convenience in operation.

The invention relates to a potassium nitrate crystallization system and process through a double-decomposition method. The potassium nitrate crystallization system comprises a dissolving tank, a potassium nitrate vacuum crystallization device, a thickener, a first centrifuge, a mixing tank, a concentration device, a potassium chloride crystallization device and a second centrifuge. The potassium nitrate crystallization process comprises the following steps: adding circulating mother liquid, water and potassium chloride into the dissolving tank, sequentially feeding material liquid into the potassium nitrate vacuum crystallization device, the thickener and the first centrifuge, separating potassium nitrate crystals from the first centrifuge, drying and cooling, thereby obtaining the finished product potassium nitrate; adding potassium nitrate crystal mother liquid into the mixing tank, adding ammonium nitrate, uniformly mixing, and sequentially feeding the mixture into the concentration device, the ammonium chloride crystallization device and the second centrifuge; separating ammonium chloride crystals from the second centrifuge, drying and cooling, thereby obtaining the finished product ammonium chloride. A set of novel potassium nitrate crystallization system and process through the double-decomposition method are disclosed by the invention, the stability of potassium nitrate crystallization is improved, and the production quality and the yield are effectively ensured.

The present invention provided a float type drain trap capable of preventing penetration of foreign matters into the pilot valve to eliminate troubles caused with penetration of foreign matters, furnishing the pilot valve operation with stability and function of snap action, and reducing the bore diameter of the pilot valve to make the float as small as possible. The pilot valve mechanism is constructed by comprising a pilot valve 7, disposed in part of the pilot chamber 8 and putting the pilot chamber 8 in communication with the outside of the drain case 1, an orifice 9, formed on the upstream side of the pilot valve 7 and putting the pilot chamber 8 in communication with the inside of the drain case 1, and a microfilter 10 provided on the orifice 9, and a permanent magnet 11 is provided on said pilot valve 7, while on said float 6 is provided a permanent magnet 12 for operating the pilot valve 7 in repellence to the permanent magnet 11.

The invention discloses a high-pressure air flow control valve. The high-pressure air flow control valve comprises an air conveying pipe and a butterfly valve installed on the air conveying pipe and further comprises a pneumatic actuator and a pressure adjusting device, wherein the pneumatic actuator is connected with a pressure control pipe and capable of driving the butterfly valve to rotate between a full-open position and a full-close position through a connection rod; and the pressure adjusting device can adjust the size of air pressure entering the pneumatic actuator through the pressurecontrol pipe. According to the high-pressure air flow control valve, flow adjustment of the air conveying pipe can be realized through simple structures, meanwhile, multiple pressure adjusting protection is realized through the adjusting device, the high-pressure air flow control valve is made to have a wide pressure use range, and the high-pressure air flow control valve has less components andparts integrally and higher reliability and accuracy and is convenient to maintain and repair in later period and relatively low in cost.

The invention relates to a synthetic method of cubic boron nitride; the method adopts the nitride of alkali metals and alkaline earth metals and the mixture of magnesium aluminum alloy as a catalyst and uses the hexagonal boron nitride as material; the nitride, the magnesium aluminum alloy and the hexagonal boron nitride are evenly mixed according to the mass ratio of 7 to 10 : 1 to 4 : 100 and the single crystal of the cubic boron nitride with the amber color from semitransparent to transparent is synthesized according to the synthetic technique processes of the invention. The method overcomes the defects that the nitride and the metal catalyst material are used separately, and leads the advantages of the two catalyst materials to have good combination; the synthesized cubic boron nitridecrystal has the advantages of amber color, regular shape, proper intensity, synthetic temperature, wide pressure range and high yield, etc.

The invention discloses a single-stage multi-head diaphragm type gas pump, which comprises a main shaft, wherein four connecting rods are arranged on the main shaft; two ends of the main shaft are connected with one end of each connecting rod through eccentric wheels respectively; bearings are arranged among the eccentric wheels and the connecting rods; a diaphragm bearing plate is arranged at the other end of each connecting rod, the connecting rods are connected with valve block pressure plates fixedly through diaphragm bearing plates, and diaphragms are fixedly arranged among the valve block pressure plates and the diaphragm bearing plates; valve covers are arranged above the diaphragms, the valve covers and the peripheries of the diaphragms are fixedly arranged inside a gap between a cylinder cover and a cylinder body, and the cylinder cover and the cylinder body form a gas cylinder; gas inlet valve blocks are arranged on the valve covers; the cylinder body is movably connected with the main shaft through another bearing; and the cylinder body is fixedly connected with a fan blade shield base, the fan blade shield base is connected with one ends of fan blades, and the other end of the fan blades are fixedly connected with the fan blade shield. The gas pump has the advantages that the size is small, the weight is light, the pump can be carried conveniently, energy is saved, the efficiency is high, and the like. The gas pump is an ideal device which can be matched with a spray gun for spray painting operation.

The invention relates to a hydrogen compressor host and a compression method. The hydrogen compressor host comprises a primary air cylinder, a secondary air cylinder and an oil cylinder, wherein a first compression cavity is disposed in the primary air cylinder; a second compression cavity which communicates with the first compression cavity is disposed in the secondary air cylinder; the oil cylinder internally comprises two independent auxiliary oil cavities which are separated by an oil cylinder piston; and the two sides of the oil cylinder piston are connected with a primary piston of the primary air cylinder and a secondary piston of the secondary air cylinder through a primary piston rod and a secondary piston rod correspondingly. The hydrogen compressor host and the compression method have the beneficial effects that the air cylinder compression cavities and the pistons are of an oil-lubrication-free structure, and process gas is protected and not contaminated; hydraulic oil is completely separated from the process gas, and thus the hydraulic oil can be prevented from contaminating the gas; the hydrogen gas entering pressure range is wide, and a pressure regulator is not needed at an inlet; through the scheme, during air cylinder working, the piston stroke is long, the speed is low, the clearance volume is small, and volume efficiency is high; and by adopting the water cooled air cylinders, the running temperature is lowered, and the service life is prolonged.

The invention provides a device for controlling gas in a cultivating tank and a method for controlling gas in the cultivating tank. The cultivating tank is provided with at least two paths of gas sources; the control device comprises a pressure sensor, which is arranged on the cultivating tank, wherein the output end thereof is connected with a control unit; a gas sensor, which is used for detecting content of at least one gas in the cultivating tank, and transmitting to the control unit; the control unit, which is used for adjusting flow of at least two gases according to the received pressure and gas content, and transmitting the adjusting instruct to adjusting unit; adjusting units, which are respectively arranged on channels of at least two gases, and adjusting gas flow according to the received adjusting instruct. The device and method for controlling gas in the cultivating tank are good in stability, long in service life, and so on.

The invention discloses a method for synthesizing cubic boron nitride by using Mg3N2 and CaH2, and belongs to the technical field of superhard material synthesis. The Mg3N2 is taken as a contact agent, the CaH2 is taken as an additive, and hexagonal boron nitride is taken as a raw material; and the method comprises the following steps of: uniformly mixing the hexagonal boron nitride, the Mg3N2 and the CaH2 in a weight ratio, prepressing the mixture and assembling into a synthetic block; maintaining the synthesis temperature of between 1,000 and 1,600 DEG C and the synthesis pressure of between 4.0 and 6.0GPa for 3 to 8 minutes; and performing chemical treatment to obtain yellow and semitransparent cubic boron nitride crystals with high crystalline form integrity rate. The contact agent and the additive used by the method have low requirement on the purity of the hexagonal boron nitride raw material, and the synthesized cubic boron nitride has high crystalline form integrity rate; and the method has the advantages of wide synthesis pressure and temperature ranges, high conversion rate and low cost and is favorable for industrial production.

An apparatus for abatement of gases is provided. The apparatus includes a toroidal plasma chamber having a plurality of inlets and an outlet, and at least one chamber wall. One or more magnetic cores are disposed relative to the toroidal plasma chamber. The plasma chamber confines a toroidal plasma. A second gas inlet is positioned on the toroidal plasma chamber between a first gas inlet and the gas outlet at a distance d from the gas outlet, such that a toroidal plasma channel volume between the first gas inlet and the second gas inlet in the is substantially filled by the inert gas, the distance d based on a desired residence time of the gas to be abated.

The invention relates to a gas-liquid mixed transportation supercharging system. The gas-liquid mixed transportation supercharging system comprises a solid filtering part, a gas liquid separation part and a compression storage part, wherein the solid filtering part is arranged at the front end of the gas-liquid separation part and communicated with a mixed transportation inlet, and is used for filtering gas-liquid mixed transportation components entering from the mixed transportation inlet; the gas-liquid separation part is arranged behind the solid filtering part, an inlet of the gas-liquid separation part is communicated with an outlet of the solid filtering part to receive the filtered gas-liquid mixed transportation components; and the compression storage part is arranged behind the gas-liquid separation part and then s used for compressing gas and storing liquid. As a result, the gas-liquid mixed transportation supercharging system guarantees high-pressure gas-liquid mixed transportation components at the outlet of a pipeline through filtering, separation and supercharging of low-pressure gas-liquid mixed transportation components at the inlet of the device, ensures the continuity of gas-liquid mixed transportation, is suitable for long-distance transportation of shale gas, coal bed gas, wellhead gas and the like currently exploited in China, and is environment-friendly and convenient to maintain.