64results about How to "Large pressure adjustment range" patented technology

The invention belongs to a static pressure measurement calibration instrument, and in particular relates to a gas pressure regulator which is designed by a new principle, and a gas pressure regulation method. The gas pressure regulator comprises a regulator main body, a transmission part, a piston assembly, a combination valve and a sealing piece. In the invention, mass regulation and capacity regulation are combined with each other, and the advantages of a mass gas pressure regulation method and a capacity gas pressure regulation method are combined together, so that higher control speed andhigher control accuracy can be realized by pressure regulation from a low range to a high range. The method comprises the following steps of: coarsely regulating a target pressure value in a mass gaspressure regulation mode and finely regulating the target pressure value in a capacity gas pressure regulation mode, namely increasing or reducing the mass of gas simultaneously for a front cavity and a rear cavity of the pressure regulator through the combination valve so as to make the target pressure value of the regulator coarsely realized; and driving a piston on a nut actuator to move back and forth in a main body cavity through a levorotatory guide screw rod and finely regulating to acquire the target pressure value.

The invention provides a piston lifting mechanism and a hydraulic control device thereof. The hydraulic control device comprises a first oil way and a second oil way, the first oil way is used for communication with a rod cavity of a piston cylinder in the piston lifting mechanism, and the second oil way is used for communication with a rodless cavity of the piston cylinder in the piston lifting mechanism. The second oil way is provided with a balance valve, the balance valve is provided with two operation ports and a control oil port, the two operation ports are in butt-joint communication with the second oil way, and the control oil port is communicated with the first oil way through a hydraulic control oil way with a damping hole section. When the hydraulic control device is applied to the piston lifting mechanism, a piston moves towards the rodless cavity, namely the piston moves downwards, hydraulic oil in the rodless cavity flows out slowly due to slow and stable opening of the balance valve, the piston moves slowly under the action of a load and high-pressure oil in the rod cavity, and high lifting stability is realized.

The invention discloses a forging moulding method and device of metal glass flux, which comprises the following steps: adding the alloy in the melting furnace; adjusting the temperature; extracting the gas in the mould when reaching the casting temperature; generating 5-15 KPa negative pressure; attracting the metal glass flux in the mould cavity to mould element. The device is characterized by the following: connecting the crucible in the melting furnace with the mould through attraction pipe; connecting the negative pressure generator with the top of mould through connection pipe; setting control valve, pressure measuring device and negative pressure stable device on the connection pipe sequently. The method can force gas pressure on the flux surface, which promotes the moulding course of metal glass flux.

An electric heating system for replacing high-temperature gas in a turbocharger test, characterized in that it includes: an electric heater (group) (6), a power regulator (group) (11), a power regulating cabinet (10), a flow meter (2), regulating valve (group) (3), etc. By using the electric heating system to generate high-temperature gas, it replaces the traditional high-temperature gas to impact the turbine to do work and drive the supercharger to run. Compared with the traditional method, the electric heating system of the turbocharger test of the present invention has the advantages of simple system, safety and reliability; clean and pollution-free, and will not overheat and burn out the turbine; the temperature stability of the turbine inlet is high, and the accuracy of temperature regulation is also high. Higher; wider flow and turbine inlet pressure adjustment range, higher precision; longer life, convenient use and maintenance, high economy and many other advantages.

The invention discloses a high-precision pressure stabilizing combination valve. The high-precision pressure stabilizing combination valve is composed of a safety valve, a one-way valve, a shell and acontact which are mutually connected through threads. A safety shutter is arranged in a valve element of the safety valve, a spring is arranged in the safety shutter, a spacer is placed at the upperend of the spring, the safety valve is formed by adjusting the thread of a screw to be connected with an insert, and the safety valve is fixedly connected with the shell through the thread. An air inlet at the upper end of the shell and a throttle hole are integrated, a one-way shutter is arranged in a valve element of the one-way valve, a spring is arranged in the one-way shutter, the spring is fixed to the shell through the thread of the contact, and the other end of the contact is connected with a system. According to the technical scheme of the high-precision pressure stabilizing combination valve, the structure is compact, the size is small, the requirements for a large inlet pressure fluctuation range and stable outlet pressure can be met, meanwhile the functions of pressure overloadprotection and reverse pressure cut-off are achieved, accurate adjustment is conducted on system pressure, the pressure adjustable range is large, and the adjustment precision is high.

The invention discloses a device for ink-jet printing a gel microsphere, and a printing method. The device for ink-jet printing the gel microsphere comprises a computer, a three-dimensional motion system, a first ink box, a second ink box, a first multi-orifice piezoelectric spray nozzle and a second multi-orifice piezoelectric spray nozzle. The first ink box and the second ink box are arranged ina pressurization device; the pressurization device is used for providing liquid outlet pressure to the first ink box and the second ink box; the first multi-orifice piezoelectric spray nozzle communicates with a liquid outlet of the first ink box; the second multi-orifice piezoelectric spray nozzle communicates with a liquid outlet of the second ink box; the first multi-orifice piezoelectric spray nozzle and the second multi-orifice piezoelectric spray nozzle are arranged on the three-dimensional motion system; the computer is electrically connected with the three-dimensional motion system, the first multi-orifice piezoelectric spray nozzle and the second multi-orifice piezoelectric spray nozzle; a nd the computer is used for controlling the three-dimensional motion system to move, and isalso used for controlling the first multi-orifice piezoelectric spray nozzle and the second multi-orifice piezoelectric spray nozzle to jet ink. The invention provides the device with high manufacturing efficiency, simplicity and convenience in operation, and capability on accurately controlling the forming of the gel microsphere.

The invention discloses a two-way flow control valve. The two-way flow control valve comprises an upper valve body 2 and a lower valve body 11 which are coaxially and fixedly connected with each other. An upper valve core 1, an upper thrust bar 3 and an upper inner valve body 4 are sequentially installed in the upper valve body 2 from top to bottom. A lower thrust bar 12, a lower inner valve body 10, a coil 6 and a non-magnetic sleeve 7 are sequentially and coaxially installed in the lower valve body 11 from bottom top, and the coil 6 and the non-magnetic sleeve 7 are arranged in a nested mode. An upper pole plate 16, a magnetorheological elastomer 8 and a lower pole plate 15 are sequentially installed in the non-magnetic sleeve 7 and located between the upper thrust bar 3 and the lower thrust bar 12 from top to bottom. The two-way flow control valve is further provided with two oil inlet and oil outlet sets. By means of the two-way flow control valve, continuous control over flow and control over valve opening pressure can be achieved by controlling magnetic field intensity, and the valve opening pressure can be changed according to external use conditions; besides, two-way pressure control is achieved through one coil, and therefore the two-way flow control valve can serve as two one-way flow control valves; the two-way flow control valve is high in response speed and wide in pressure control range.

The invention relates to the technical field of emergency pressure release tools in well drilling and cementation operations, in particular to a spring sheet type pressure release valve. The pressure release valve comprises a valve body, a ball seat, a cavity spring seat, a mounting body, a spring sheet, a ball and an adjusting lead screw; an axial passage is formed in the valve body; a first ring slot, the inside diameter of which is greater than that of the axial passage, is formed in the middle part of the valve body; the ball seat is clamped on the right part of the first ring slot; the inner part of the ball seat is communicated with the axial passage; a second ring slot, the inside diameter of which is greater than that of the first ring slot, is formed in the valve body on the left part of the first ring slot; the right part of the cavity spring seat is fixedly arranged in the second ring slot; and a mounting head, the outside diameter of which is greater than that of the mounting body, is fixed at the right end of the mounting body. The pressure release valve is reasonable and compact in structure and convenient to use; automatic opening and closing of the valve are realized by using the spring sheet; through the pressure release valve, overpressure protection on the personnel safety and a high pressure system can be realized without halting, the pressure adjusting range is enlarged, and the released pressure can be randomly adjusted; and the pressure release valve is convenient to assemble and disassemble.

The invention discloses a method for preparing a high-performance-fiber-reinforced hard bulletproof composite material. According to the method, woven fabrics of high-performance carbon fibers, aramid fibers and high-strength polyethylene fibers serve as prefabricated members, the reinforcing effect of the high-performance carbon fibers and the aramid fibers and the bonding effect of high-strength polyethylene molten into a matrix at a certain temperature are fully used, the prefabricated members are compression-molded through a compression molding device, and the composite material of the carbon fibers, the aramid fibers and the high-strength polyethylene fibers is obtained. The obtained composite material has different mixing synergistic effects, the bulletproof performance and the mechanical property can be effectively improved, and the composite material has good observability and a wide pressure regulation range. The quality of the inner structure of the composite material is easy to guarantee, the boundary dimension accuracy is high, and therefore the composite material is widely applied to the field of industrial composite materials.

The invention discloses a throttle loop. The throttle loop comprises a first working port (A), a second working port (B), a directional flow control valve (1) and four switch valves (21, 22, 23, 24), wherein the first working port (A) is communicated with the pressure oil port (1P) of the directional flow control valve (1); the four switch valves (21, 22, 23, 24) are connected between the first working port (A) and the first working oil port (1A) of the directional flow control valve (1), between the first working oil port (1A) and the second working oil port (1B) of the directional flow control valve (1), between the second working oil port (1B) and the second working port (B) of the directional flow control valve (1) and between the second working port (B) and the oil return port (1T) of the directional flow control valve (1) in series respectively. The through-current capability of the throttle loop can be regulated, so that the throttle loop is applicable for a relatively wide pressure regulation range.

The invention discloses a gas high-sealing intermediate-speed pressure regulating system and method. The gas high-sealing intermediate-speed pressure regulating system is composed of an inflation tank, a deflation tank, a pneumatic compressor, a drive gas cylinder, a vacuum pump, a gas storage tank, a valve, a pipeline, an instrument and the like. The whole system is in all metal material seal, and a multi-level anti-leakage measure is set. The pressure of a reaction gas screen is increased or reduced at an intermediate speed through a gas loop in the intermediate-speed inflation and deflationprocesses of the inflation tank and the deflation tank. A pneumatic compressor is a metal bellows diaphragm compressor under the dual effects of gas pressure drive and vacuum drive, the drive gas inflow and exhaust processes are achieved through an inflow pipeline connected with the drive gas bottle and an exhaust pipeline connected with a ventilator, process gas in the deflation tank is repeatedly sucked to be compressed into intermediate-pressure gas to be exhausted into the inflation tank, the pneumatic compressor can be driven under vacuum through the vacuum pump in turns so that the process gas with the pressure lower than normal pressure in the deflation tank can be sucked, the process gas is driven under gas pressure, compressed and pressurized into the inflation tank, and residuesare reduced. The gas high-sealing intermediate-speed pressure regulating system and method can be used for gas drive liquid lifting, a nuclear fuel power transient-state test and the like.

The invention relates to a pressure testing device for a pipeline. The device comprises a connecting pipe, a pressure detector, a rough adjusting device, a fine adjusting device and a first control valve, wherein the connecting pipe is used for connecting the pipeline to be tested; the pressure detector is used for detecting the pressure in the connecting pipe; the rough pressure regulating deviceis used for conveying testing liquid to the connecting pipe and the pipeline to be tested in order to enable the connecting pipe and the pipeline to be tested to be full of liquid and keep the innerpressure at first preset pressure value; the fine pressure regulating device is used for conveying the testing liquid to the connecting pipe and the pipeline to be tested in order to enable the innerpressure of the connecting pipe to increase from the first preset pressure value to the second preset pressure value which is beyond the first preset pressure value; the first control valve is arranged at the connecting pipe and is used for opening and closing communication between the pipeline to be tested and the rough pressure regulating device as well as the communication between the pipelineto be tested and the fine adjusting device. The pressure testing device is wide in pressure regulating range, high in accuracy, and more intuitive in leaking condition observation.

The invention discloses a supply pressure adjusting device, and belongs to the technical field of automobile engines. A control shell is arranged at the end, close to an energy storage cavity, of a valve body in a sealed mode, and a pressure medium inlet, the energy storage cavity and a pressure medium outlet which are communicated are formed in the control shell. A gas inlet cavity, a first installation cavity and a second installation cavity are sequentially and coaxially arranged in the valve body, the outer circumferential face of a pilot valve element and the inner circumferential face of the second installation cavity are matched in a sealed mode, a gas pressure adjusting cavity is separated, and stop valves are arranged at the pressure medium inlet and the pressure medium outlet of the control shell. According to the control strategy, the stop valves of the pressure medium inlet and the pressure medium outlet are rapidly controlled, a pressure medium is supplemented or released for the energy storage cavity storing the pressure medium, therefore, the pressure adjusting response is fast, the control precision is high, the pressure adjusting range is wide, and the pressure difference range of the energy storage cavity and the gas pressure adjusting cavity can be freely and accurately adjusted.

The invention discloses a pressure cooling process of segmented reinforcing type parts of a hot forming steel plate, and pressing machine servo ejector rod devices. Through the independent pressing machine servo ejector rod devices, the magnitude of loading force borne by a workpiece and/or force bearing and pressure keeping time for the workpiece are adjusted, and therefore the cooling speed of each sub-area of the workpiece is controlled, different types of material mechanical performance of the sub-areas of the workpiece are obtained. Required material characteristics can be achieved for any area according to the design requirements, no additional die heating device needs to be arranged, and production cost and procedure complexity are greatly reduced.

The invention relates to the technical field of gas pipeline control, and discloses a gas decompressor. The gas decompressor comprises a decompressor shell, a valve element, a valve cover and a stepping motor; the decompressor shell comprises a high-pressure chamber, a low-pressure chamber, a decompressor inlet communicating with the high-pressure chamber and a decompressor outlet communicating with the low-pressure chamber; the stepping motor is connected with the valve element and used for controlling circumferential motion of the valve element in the decompressor shell, the valve cover restricts axial motion of the valve element, and a circumferential slit groove is formed in the cylinder surface, communicating with the decompressor shell, of the valve element; and when the valve element rotates to the condition that the slit groove is in contact with the high-pressure chamber, and gas coming from the decompressor inlet and entering from the high-pressure chamber through throttlingof the slit groove enters the low-temperature chamber and flows out from the decompressor outlet. The pressure of the decompressor outlet can be adjusted in a wide-range and high-precision mode, and decompression of the gas is realized.