41results about How to "Meet pressure needs" patented technology

The invention provides a three-level or four-level variable displacement machine oil pump based on double switch electromagnetic valves. A dual-variable feedback cavity structure is adopted; one variable feedback cavity is directly connected with a pump outlet; the other variable feedback cavity is controlled by a pressure control valve; and the control valve comprises two independent control cavities which communicate with a main oil passage and are controlled by the switch electromagnetic valves. The two switch electromagnetic valves enable the pressure control valve to have four different pressure control modes under four different combined states which are off-off, on-off, off-on and on-on, and an oil pump correspondingly forms four different pressure control modes, so that pressure demands of an engine under different working conditions can be met, the aim of getting close to pressure control actually required by the engine is achieved, and power conservation of the three-level orfour-level variable displacement machine oil pump based on the double switch electromagnetic valves is close to power conservation of a continuous variable displacement machine oil pump controlled byadopting an electro-hydraulic proportional valve; and in addition, a control mode is simple and reliable in logic, the response is fast, the pressure control is stable, and the pressure fluctuation is small.

The invention discloses a method for preparing dichlorosilane, which comprises the following steps: under the condition that anion exchange resin is taken as a catalyst, trichlorosilane is enabled to be in disproportionation reaction to obtain a reaction product containing silicon tetrachloride and dichlorosilane; dichlorosilane is separated from the reaction product. Through the application of the method, dichlorosilane is prepared safely and efficiently, the method is low in cost, low in reaction temperature and pressure, safe, easy to operate, strong in adaptability, and free from pollution, and the quality of prepared dichlorosilane is very good.

The invention discloses a pressure reducing valve which comprises a shell, a valve seat, a valve element assembly, a damping disc, an ejector pin, a diaphragm, a main spring seat, a main spring, a supporting disc and an adjusting piece; the shell is provided with an inlet and an outlet, and an auxiliary spring seat is arranged at the end of the shell; the valve seat is arranged in the shell; the valve element assembly is arranged on the valve seat, an auxiliary spring outer sleeve is arranged at the top of the valve element assembly, auxiliary springs are arranged on the auxiliary spring outersleeve and the auxiliary spring seat, and the auxiliary springs apply downward pre-tightening force to the valve element assembly; the damping disc is arranged below the valve element assembly, and aplurality of feedback holes are formed in the damping disc in the circumferential direction; the diaphragm is arranged below the damping disc, one end of the ejector pin makes contact with one side of the diaphragm, and the other end of the ejector pin penetrates through the damping disc to abut against the bottom of the valve element assembly; the main spring is arranged between the main springseat and the supporting disc, and the supporting disc makes contact with the other side of the diaphragm; and the adjusting piece is connected to the main spring seat.

The invention provides a solar photovoltaic panel surface cleaning system and a cleaning method. The system is characterized in that the whole cleaning device is arranged on an unmanned aerial vehicle, an infrared camera and a visible light camera which are used for shooting are arranged on the unmanned aerial vehicle, a stain positioning system used for positioning is further arranged on the unmanned aerial vehicle, and meanwhile, a device for loading cleaning liquid and a device for loading carbon dioxide are arranged. Compared with an existing photovoltaic panel decontamination technology, the system adopts an environment-friendly stain cleaning agent, the surface of a solar photovoltaic panel is sprayed with the stain cleaning agent, meanwhile, a carbon dioxide snow decontamination technology is matched, so that residual stains are cleaned again without leaving water stains; and therefore, the problem of water shortage in regions such as deserts or gobi is solved.

The invention discloses a multifunctional hydraulic combination valve which comprises a valve seat. An oil leakage screw is installed on the right side of a valve sleeve in a threaded connection mode. The valve sleeve is installed on the right side of the valve seat in a threaded connection mode. A steel ball mounting hole is formed in the left side inside the valve sleeve. A valve seat stepped shaft hole is formed in the right side inside the valve seat. A steel ball seat is installed in the valve seat stepped shaft hole and aligned at the steel ball mounting hole. A steel ball is installed in the steel ball mounting hole and can move in the steel ball mounting hole and the steel ball seat. A mandrel is installed in the middle portion inside the valve sleeve, and an ejector rod of the mandrel corresponds to the steel ball. A spring is installed in the connecting position of the valve sleeve and the oil leakage screw. The front end of the spring abuts against the mandrel, and the rear end of the spring abuts against the oil leakage screw. The multifunctional hydraulic combination valve is simple in structure, convenient to manufacture and machine, and high in response frequency.

The invention relates to the technical field of underwater winches, in particular to an underwater winch adopting a hydraulic brake system. The underwater winch comprises a winch rack, a brake and a speed reducer, the winch rack is provided with a winch drum and a rope arranging device, the brake and the speed reducer are connected with the drum, the brake is connected with a hydraulic cylinder, and the hydraulic cylinder is connected in a hydraulic system controller. The speed reducer is connected with a gear assembly, the gear assembly is connected with the winch drum and the rope arrangingdevice, and a mooring rope is wound on the winch drum. The brake is arranged to be a belt brake. The underwater winch further comprises a first mounting cabin and a second mounting cabin, and a hydraulic control system is placed in the second mounting cabin. The hydraulic system is adopted for controlling the belt brake to control the descending speed of the underwater winch, when the underwater winch is close to the designated depth, a descending stopping instruction is obtained, a brake belt is tensioned, system braking is achieved, multiple times of braking can be adopted in the working process to control the descending speed of the winch, the structure is simple, operation is convenient, and a good control effect is achieved.

The invention discloses an ear cicatrix pressure clamp. The ear cicatrix pressure clamp comprises an elastic piece (1) bent along the waist, wherein two ends of the elastic piece (1) are connected with a pair of clamping pieces (2), and the end of the elastic piece (1) and the clamping pieces (2) can relatively rotate around the compression direction of the ear cicatrix. Under an initial state, the elastic piece (1) generates a pair of opposite forces at two ends of the elastic piece (1), so that the pair of clamping pieces (2) can press the ear cicatrix. The ear cicatrix pressure clamp is easy in use, is attractive in appearance and is low in cost.

The invention discloses a floating supporting single-point incremental hot forming device. The floating supporting single-point incremental hot forming device comprises a supporting body device, the supporting body device comprises a bottom plate, a lower sliding plate and an upper sliding plate, at least two guide columns are fixedly installed on the bottom plate, the upper sliding plate and thelower sliding plate are installed on the guide columns in a sliding mode; a heating clamping device used for clamping a to-be-machined plate is fixedly installed on the upper sliding plate, a floatingheating supporting mold device which penetrates through the upper sliding plate and the lower sliding plate and extends into the heating clamping device to make contact with the to-be-machined plateis fixedly installed on the bottom plate; heating parts electrically connected with a controller are arranged at the contact position of the heating clamping device and the to-be-machined plate and the contact position of the floating heating supporting mold device and the to-be-machined plate; and adjusting devices used for adjusting the floating force of the floating heating supporting mold device are fixedly arranged on the bottom plate and the lower sliding plate.

The invention relates to a pressure-bearing electrochemical water treatment device, which includes a box body, a door body, a cathode plate, an anode plate, a water inlet assembly, a water outlet pipe, and an anti-falling arm. One end of the anti-falling arm is connected to the pivot of the door body, and the other end Connect the door body; the water inlet component includes the water inlet pipe and the retaining net, the water inlet pipe and the water outlet pipe are respectively arranged at the lower part and the upper part of the box body, and the water outlet pipe is connected with the inside of the box body Both ends pass through, when one end of the water inlet pipe enters water, the other end is closed by a valve, when one end of the water outlet pipe is discharged, the other end is closed by a valve; the retaining net is set obliquely and fixedly connected to the water inlet pipe, and the water inlet pipe passes through the mesh on the retaining net It communicates with the inside of the box body; the cross section of the box body is arc-shaped, and the cross-section of the door body has an arc-shaped section. The water treatment device of the present invention has the advantages of large pressure bearing, long service life of the anode plate, convenient opening of the door body, improved treatment effect of the device, simple and convenient operation and maintenance, expanded working conditions and adaptable installation space.

The invention provides a ferromagnetic resonance probe. The ferromagnetic resonance probe comprises a planar waveguide and further comprises a base and a ballasting assembly; the planar waveguide is arranged on the base; the ballasting assembly is arranged on the base and provided with a bearing platform used for bearing a to-be-detected sample; and the bearing platform and the planar waveguide are arranged oppositely and movably so as to press the to-be-detected sample on the planar waveguide. According to the ferromagnetic resonance probe, the problem that as for a ferromagnetic resonance probe in the prior art, the situation that the to-be-detected sample is inclined to the planar waveguide is difficult to avoid in the detection process is solved; and a high-thermal-conductivity channelis established between the to-be-detected sample and the base, and fast and accurate control over the sample temperature is achieved.

The invention discloses a gas water-sealed tank for a fermentation bin and a fermentation device. A cover plate is arranged at the top of a tank body, a water level adjusting device is arranged on thetank body, the cover plate is detachably connected to the top of the tank body in a sealing manner, a water seal pipe, an exhaust valve and a water inlet valve are arranged on the cover plate, the water seal pipe vertically extends into the tank body, the bottom end of the water seal pipe extends below the water level of the tank body, the top end of the water seal pipe is communicated with an exhaust hole of the fermentation bin through a pipeline, the water level adjusting device comprises an electronic liquid level meter, the electronic liquid level meter is installed on the tank body andused for detecting the liquid level in the tank body, and the electronic liquid level meter and the bottom end of the water seal pipe are located at the same horizontal position. Gas generated in thefermentation bin is exhausted in real time through the gas water-sealed tank, the sealing performance of the fermentation bin is guaranteed, and meanwhile, the problem of sealing pressure exhaust of the fermentation bin is solved. Meanwhile, the pressure in the fermentation bin is automatically adjusted in real time through the water level adjusting device, the pressure requirements of different fermentation time periods are met, and the defects of existing technical means are overcome.

The invention discloses a method for using a secondary shield fastening device between 90-degree angle zone modules of a Mark III type cargo tank. The device comprises a fixed frame, a fixed depression bar, a plane and a corner pressing system. The frame has a 90-degree included angle; a turning plate is used for connection at the corner; and thus the pressing system is installed at the corner. The plane and corner pressing system enable forces to be distributed on a pressed surface uniformly. The systems are connected by bolts; and the force on the pressed surface is adjusted by setting different torsion values. With a guiding rod, the force transmission process is stabilized. Therefore, the force applied to the peak of the 90-degree corner is identical with the forces applied to the plane at the two sides; the pressure controllability and integrity controllability during the pressing process after secondary shield bonding of the 90-degree angle zone are guaranteed; and thus the bonding work quality is improved.

The invention discloses a modular liquid path for an ocean detection instrument. The modular liquid path comprises a liquid path engraving part and end cover parts on the two sides, wherein the two sides of the liquid path engraving part are provided with a plurality of liquid path grooves; the liquid path grooves communicate by first through holes formed in the liquid path engraving part; sealinggrooves are formed in the peripheries of the liquid path grooves; bumps matched with the sealing grooves are arranged on the inner sides of the end cover parts; and second through holes correspondingin position are further formed in the end cover parts and the liquid path engraving part. According to the modular liquid path, the occupied space of the liquid path is reduced, the process requirements are reduced, the cost is effectively controlled, the sealing performance is good, the probability of blocking the liquid path by bubbles is reduced, and the modular liquid path is adaptive to ocean environment detection.

The invention relates to a three-dimensional constant-overhang-pressure natural gas hydrate efficient simulation model. The three-dimensional constant-overhang-pressure natural gas hydrate efficient simulation model comprises a simulation bracket, a pressure simulation container and a hydrate simulation container; the simulation bracket comprises a pair of supporting blocks distributed in the up-down direction, the pressure simulation container is arranged in a gap between the two supporting blocks, and the pressure simulation container comprises a pressure container main body; and the hydratesimulation container is arranged in the pressure simulation container and driven by a feeding mechanism to go into or go out of the pressure container main body, and meanwhile, the pressure containermain body is further internally provided with a hydrate simulation container clamping mechanism. The three-dimensional constant-overhang-pressure natural gas hydrate efficient simulation model has the advantages that by additionally arranging the pressure simulation container on the outer side of the hydrate simulation container, when the hydrate simulation container deforms, the hydrate simulation container can be prevented from deforming by changing the pressure in the pressure simulation container, in this way, the hydrate simulation container can be overall made to be thin, the weight ofthe corresponding hydrate simulation container is also decreased, and experiments are facilitated.

The invention relates to the field of press equipment, in particular to a pneumatic hydraulic press capable of effectively meeting the pressure requirement and simultaneously meeting the explosion prevention requirement. The pneumatic hydraulic press comprises a press frame, wherein a vertically downward hydraulic cylinder is mounted on the press frame; a pressure plate is mounted on a piston rod of the hydraulic cylinder; the pneumatic hydraulic press is characterized in that the pressure plate is connected with one end of an energy accumulator through an oil pipe and a pneumatic operated directional valve; and the other end of the energy accumulator is connected with a pneumatic hydraulic pressurizing device.

The invention provides an axisymmetric full-speed-domain ramjet engine using electric auxiliary supercharging, and belongs to the technical field of aerospace equipment. The problem that a traditional hybrid engine cannot meet the high-speed requirement of an aircraft is solved. The engine comprises an air inlet channel center cone, an engine shell, a fixed guide column, a high-speed motor, an air compressor, a fuel nozzle, a combustion stabilizer and a spray pipe, the air inlet channel center cone is arranged in the front end of the engine shell through the fixed guide column, the high-speed motor is arranged in the air inlet channel center cone, and the air compressor is connected with the high-speed motor; a combustion chamber is arranged in the portion, at the rear end of the gas compressor, of the engine shell, the multiple fuel nozzles are evenly distributed on the inner wall of the engine shell in the circumferential direction of an inlet of the combustion chamber, and the multiple combustion stabilizers are evenly distributed in the area, close to the center, of the combustion chamber in the circumferential direction of the inlet of the combustion chamber. The rear end of the engine shell is connected with the nozzle. The method is mainly used for the full-speed-range ramjet engine.

The invention discloses a pressure calibration method of a bipolar guide rail pressure mechanism. The pressure calibration method comprises the following steps: a pressure sensor is installed on an index plate of a tube housing positioning mechanism; and a motor is started, a Z-axis lead screw shaft is driven to rotate through a shaft coupler, the Z-axis lead screw shaft drives a Z-axis nut blockto move downwards, the Z-axis nut block drives a seal welding head to move downwards, and when the photoelectric sensor on the seal welding head is shielded by a photoelectric induction piece on a pressure block, a starting calibration point is set. The method is simple, convenient and precise, and the rejection rate is reduced while the pressure requirements of various common environments are met.

The invention discloses low-energy consumption fermentation apparatus for wine making. The fermentation apparatus comprises multiple fermentation rooms supported by a frame; the multiple fermentationrooms are combined in series to form the fermentation apparatus; the top part of each fermentation room is provided with a feeding hole, and the bottom part of each fermentation room is provided witha discharge hole; each feeding hole is sealed by a sealing cover; the multiple fermentation rooms compose multiple independent rooms correspondingly; the periphery of each fermentation room is provided with a heat exchange sandwich layer into which a cooling medium is injected; and the fermentation rooms realize adjustment of temperature of materials in the rooms through the heat exchange sandwichlayers. According to the low-energy consumption fermentation apparatus, the mutually independent fermentation rooms are combined in series to form the fermentation apparatus and the heat exchange sandwich layers are arranged, and the temperature of the materials in the rooms is adjusted through the heat exchange sandwich layers, thereby realizing precise control on fermentation temperature; and such method avoids the problems that energy consumption is high and control over the fermentation temperature is inaccurate by a traditional method, and overcomes the shortcomings of the prior art.

The invention discloses an active pressure compensation device and method and a double-wheel slot milling machine, belongs to the field of piling machinery, and aims to realize automatic adjustment of internal pressure of a working device. The active pressure compensation device comprises an oil liquid converter, a working device, a detection assembly and a control device. The oil liquid converter comprises a first cavity and a second cavity which are not communicated with each other; the sum of the volume of the first cavity and the volume of the second cavity is determined, and the volume change trends of the first cavity and the second cavity are opposite; the working device is in fluid communication with the second cavity; the detection assembly is used for detecting the pressure of a third fluid outside the working device and the pressure of a second fluid inside the working device; the control device is in communication connection with the detection assembly and is configured to control the volume of the first cavity according to the difference value between the detected pressure of the third fluid and the detected pressure of the second fluid so as to control the internal pressure of the working device. According to the active pressure compensation device and method and the double-wheel slot milling machine of the technical schemes, real-time and dynamic adjustment of the internal pressure of the working device is achieved.