130results 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.

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.

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 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 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 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.

The invention relates to a dynamic-static positive-negative pressure loading experiment system and method for in-vitro cells. The system comprises a gas-source gas storage bottle, a pressure reduction valve, an electromagnetic gas valve, a filter, a diverter, a high-voltage buffering container, a normal-voltage buffering container, a high-voltage container, a low-voltage container, a vacuum pump, a compression pump, a pressure culture box, a digital display temperature transducer, a digital display pressure meter strap transducer, a data acquisition system, a driving control system, a heater and a water bath tank, wherein the gas-source gas storage bottle is connected with the pressure culture box through the pressure reduction valve, the electromagnetic gas valve, the filter and the pressure container; the pressure culture box is connected with the vacuum pump and the compression pump through the pressure container; and the pressure culture box is also connected with the data acquisition system and the driving control system through a pressure sensor and a temperature sensor. The dynamic and static positive-negative pressure loading experiment system can simulate an in-vivo mechanical environment of multiple cells in vitro, in particular a pressure environment of a temporal jaw joint cavity and supply a research platform to in-vitro research on a biomechanical response of in-vivo cells.