74results about How to "Applicable to a wide range of working conditions" patented technology

The invention discloses a barrier and travelable area detection method based on a vehicle-mounted binocular camera. The barrier and travelable area detection method comprises the following steps of S1, taking an image through a binocular camera; S2, preprocessing the image; S3, calculating the final matching cost of each pixel point in the image; S4, calculating through the final matching cost to obtain a v-disparity map; S5, determining the horizon line and the road scope by means of the v-disparity map; S6, calculating to obtain a barrier-road intersecting line in the road scope; S7, determining the scope of the current lane and the outermost lane; S8, calculating to obtain the height of the barrier on the part above the barrier-road intersecting line; S9, determining the image areas which belong to the same barrier; and S10, outputting the road area information and barrier information. Under the premise that disparity precision is not reduced, unnecessary binocular disparity map calculation is avoided, and therefore the real-time performance of the algorithm is greatly improved, and the barrier and travelable area detection method based on the vehicle-mounted binocular camera is suitable for fields of driving warning, automatic driving and the like.

The invention provides a thermal hydraulic experiment device and method for simulating a nuclear reactor neutron reactivity feedback process. The thermal hydraulic experiment device comprises an electric heating experiment section, a shell-tube type cooler, a voltage stabilizer, a pressurizing nitrogen gas tank, a circulating pump, a cooling water pump, a cooling water tank, a cooling water tower, a pipeline, a valve, a measuring instrument, a data acquisition system, a control computer, a high-frequency direct-current power supply and a conductive copper bar. The high-frequency direct-current power supply is used for electrifying the electric heating experiment section. The circulating pump is connected with an inlet of the electric heating experiment section through a pipeline; the circulating pump is provided with a bypass pipeline; an outlet of the electric heating experiment section is connected with a pipe side inlet of the shell-tube type cooler through a pipeline. A control system for simulating nuclear reactor neutron reactivity is additionally arranged on the thermal hydraulic experiment device, and can be used for simulating the reactivity feedback process and a thermal hydraulic response process of nuclear reactors under various instant working conditions; the thermal hydraulic experiment device has the advantage of simulating various types of experiment working conditions, which are not easy to carry out in the nuclear reactor, under a nuclear-radiation-free environment.

The invention discloses a multifunctional upright robot and belongs to the field of engineering machinery. the multifunctional upright robot comprises a walking chassis 1, a horizontal position adjusting system 2, an upright loading system 3, a center rotary system 4, a variable amplitude system 5, an upright fixing system 6 and a power control system 7. The walking chassis 1 drives the overall movement of the robot. The horizontal position adjusting system 2 adjusts the positions of all devices on the horizontal position adjusting system 2 in the horizontal direction. The upright loading system 3 carries columns on the ground or in other positions onto the upright robot. The center rotary system 4 adjusts the positions of all devices on the center rotary system 4. The variable amplitude system 5 adjusts the angles, relative to the ground, of all devices on the variable amplitude system 5. The upright fixing system 6 is used for fixing the columns and driving the columns to rotate round the axial direction. The power control system 7 can provide energy for a complete machine and controls all parts to work cooperatively. According to the multifunctional upright robot, in the upright installation process, functions are more abundant, the applicable working conditions are wider, and operation is more convenient and faster.

The invention provides a preparation method of a filter material with denitration and dioxin-removal effects. The preparation method comprises the following steps: (1) after an active metal catalyst powder and PTFE resin powder are mixed, catalyst-containing PTFE fiber and a catalyst-containing PTFE micro-porous membrane are respectively prepared; (2) the catalyst-containing PTFE fiber and high-strength PTFE fiber are made into warp beams by a 1-10:1-10 alternate arrangement mode, and a PTFE base cloth layer is prepared by a weaving mode; (3) the catalyst-containing PTFE short fiber and a base material undergo composite acupuncture or spunlace on the surface of the PTFE base cloth layer so as to prepare a PTFE felt layer; (4) an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixed treating fluid, and the PTFE felt layer undergoes mass-impregnation treatment and then is sintered at 300-350 DEG C; and (5) the sintered PTFE felt layer and the catalyst-containing PTFE micro-porous membrane are simultaneously introduced into a hot laminator to undergo surface hot-press lamination processing. According to the invention, filtration accuracy and denitration and dioxin-removal efficiency can be enhanced remarkably.

The invention relates to the technical field of agricultural machinery and especially relates to an intelligent integrated water and fertilizer machine. The intelligent integrated water and fertilizer machine comprises a main pipeline, a fertilizer conveying branch, a cleaning pipeline, a master control panel and a control panel, wherein a fertilizer path solenoid valve and a fertilizer path flow meter are arranged on a fertilizer conveying pipeline and are used for controlling the supply of the fertilizer and monitoring the fertilizer volume; the pressure of the main pipeline is controllable; the fluid flow fluctuation is less; the fertilizer supply precision is high and the fertilizer application is more intelligent; when the solenoid valve for the cleaning pipeline is opened, the clean water is conveyed into the fertilizer conveying branch through the cleaning pipeline, the flow meter of the fertilizer path and the pump are cleaned and the corrosion caused by long-term use is avoided; under the action of a mode switch, the machine provided by the invention can respectively work under the flow control mode, the time control mode, the humidity control mode and the manual control mode, the operation is flexible, the control is accurate and the scope of the suitable working condition is wide.

The invention relates to a resistor sampling isolation current detection circuit. The circuit comprises: a half-bridge circuit and a linear current sensor circuit. The half-bridge circuit comprises: an upper bridge transistor, a lower bridge transistor and a sampling resistor. The linear current sensor circuit comprises: a linear current sensor chip, a bootstrap capacitance charging circuit, a voltage stabilization capacitor and an output pullup resistor. The bootstrap capacitance charging circuit is formed by a diode and a charging capacitor. The current detection circuit of the invention also comprises: a charge pump circuit, a charge pump starting circuit, a photoelectric isolating circuit and a signal processing circuit. An output terminal of the charge pump circuit is respectively connected with a floating power supply terminal and a floating ground terminal of the linear current sensor chip. The charge pump starting circuit provides power for the charge pump circuit through the half-bridge circuit. An input terminal of the photoelectric isolating circuit is connected with the output terminal of the linear current sensor circuit. The output terminal of the photoelectric isolating circuit is connected with the output terminal of the signal processing circuit. After processing a signal, the signal processing circuit transmits the processed signal to a post-stage control circuit. The current detection circuit of the invention is suitable for detecting various kinds of half-bridge circuit currents in an electric power electron technology field.

The invention relates to a half-bridge drive circuit comprising a half-bridge circuit, a driver and a bootstrap capacitor charging circuit, wherein the half-bridge circuit is connected between a power supply VBAT (Voltage of Battery) and a power ground GND (Ground); a signal input end of the driver is connected with an external control unit; a high-side driving signal output end, a high-side driving floating ground end, a low-side driving signal output end and a low-side driving ground end on a driver are connected with the half-bridge circuit; and the bootstrap capacitor charging circuit is simultaneously connected with a high-side driving floating power supply end and the high-side driving floating ground end on the driver, and the bootstrap capacitor charging circuit and the driver share low-voltage input. The half-bridge drive circuit is characterized by further comprising a charging pump circuit which is used for maintaining the voltages on two ends of a charging capacitor C1 when a low-voltage input end cannot charge the charging capacitor C1 through a diode D1 in the bootstrap capacitor charging circuit, the charging pump circuit is connected with the high-side driving floating power supply end and the high-side driving floating ground end on the driver, and the ground of the charging pump circuit is connected with the power ground of the half-bridge circuit. The half-bridge drive circuit has the adaptability to a wide working condition range and is suitable for driving various half-bridge circuits in the technical field of power electronics.

The invention provides a preparation method of a high performance polytetrafluoroethylene functional filter material for denitration and dioxin removal. The method includes the steps of: (1) mixing active metal catalyst powder with PTFE resin powder to make catalyst-containing PTFE fiber and a catalyst-containing PTFE microporous film respectively; (2) making the catalyst-containing PTFE fiber and high strength PTFE fiber into a warp beam by means of 1-10:1-10 alternate arrangement, and making a PTFE base cloth layer by machine weaving; (3) mixing an active metal catalyst emulsion with a PTFE emulsion to prepare a catalyst mixed treatment solution, conducting overall impregnation treatment on the PTFE base cloth layer, and then performing sintering at 300-350DEG C; and (4) introducing the sintered PTFE base cloth layer and the catalyst-containing PTFE microporous film into a hot film laminator simultaneously, and carrying out hot pressing laminating processing. The high performance polytetrafluoroethylene functional filter material provided by the invention can significantly improve the filtering precision and the efficiency of denitration and dioxin removal.

The invention provides a structural plane controlled side slope wedge block unstable sliding physical model test platform and a use method thereof. The test platform consists of wing plates, an inclined platform, an inclined platform ejector rod, a base plate and a rotating shaft. The base plate and the inclined platform are both in a plate structure overall. A screw rod is arranged on the upper surface of the base plate. During work, the screw rod is driven to put the inclined platform ejector rod into motion, thus realizing the function of adjusting the inclination angle of the inclined platform. The use method of the test platform includes: adjusting the rotation angle of the wing plate and the inclination angle of the structural panels, laying a structural plane sandwich similar material, placing a prefabricated wedge-shaped test block, performing testing and other steps. By adjusting the inclination angle of the inclined platform, the rotation angle of the wing plates and the inclination angle of the two wing plates, the test platform can accurately simulate the unstable sliding process of the wedge-shaped block under any spatial position condition, and can be applicable to extensive working conditions. The test platform has the advantages of simple structure, low fabrication difficulty and simple test operation process, and is suitable for promotion and use.

The invention provides a test device for simulating a dike closure hydraulic process and a method and belongs to the field of physical model experiments of hydraulics. The test device for simulating a dike closure hydraulic process comprises a testing module, a reservoir capacity change module, a data collecting module and a control module; the testing module consists of all basic testing components; the reservoir capacity change module is externally connected to the testing module; the data collection module is supported by the testing module; the control module is used for controlling a testing process. The method of the test device for simulating a dike closure hydraulic process comprises a device preparation process, a tide level adjusting process, a testing and parameter recording process, a post-testing processing process, a working condition changing testing process, and testing completion and device arrangement. The device has the advantages of simple structure, close connection of components and high testing process efficiency and is widely applicable to many working conditions; the testing design is remarkably superior to the conventional dike closure hydraulic physical model testing design.

The invention discloses a gas-state pollutant generating device and method for detecting performance of an air purifier. The device comprises a constant-flow pump, the constant-flow pump is connected with the liquid inlet of an atomization nozzle, the air inlet of the atomization nozzle is connected with a floater flowmeter, atomized liquid enters an evaporation chamber, an electric heating band is arranged outside the evaporation chamber, a temperature comptroller is arranged on the electric heating band, a heat preservation layer is arranged outside the electric heating band, and the outlet of the evaporation chamber is connected with a purifier test system. The gas-state pollutant generating device and generating method are simple in principle, low in cost, suitable for various pollutants which are formed by liquid evaporation and generate gas, economical and practical. A computer can remotely control the rotating speed of the constant-flow pump, control and adjust the occurrence number of the pollutants and adjust the temperature of the electric heating band, a certain quantity of gas-state pollutants can be generated, and the operation is simple and convenient.

The invention discloses a rotary steering tool for well drilling. The rotary steering tool for well drilling comprises a pair of hollow joints arranged up and down and in butt joint, wherein each hollow joint is provided with a threaded head section and a light pipe section which are of an integral structure, the threaded head sections of the upper hollow joint and the lower hollow joint are oppositely arranged, the light pipe sections of the upper hollow joint and the lower hollow joint are each provided with a rolling bearing, an outer sleeve is arranged on the periphery of each rolling bearing, and the outer sleeves are supported on the rolling bearings; three hollow windows arranged in the circumferential direction are formed in each outer sleeve, wherein each hollow window is providedwith a supporting block, each supporting block is provided with a hydraulic cylinder, and the hydraulic cylinders drive the supporting blocks to stretch out along the hollow windows and abut againstthe well wall with mud pressure difference between the interior and the exterior of a drill column as power; when no pressure difference exists between the inner mud and the outer mud of the drill column, reset springs of the hydraulic cylinders enable the supporting block to retract; and a mud channel is formed in the connecting portion of the upper hollow joint and the lower hollow joint, so that mud in the tool enters the hydraulic cylinder, and pistons can be driven to push the supporting blocks to stretch out; one hydraulic cylinder of one supporting block is further provided with a reversing valve which is used for enabling the hydraulic cylinder of the supporting block to communicate with the mud in the drill column or the mud outside the drill column. According to the rotary steering tool for well drilling, a stable inclined drilling working mode, a rotary steering working mode, a full-closed tripping working mode and a tripping working mode can be selectively realized.

The invention discloses a cooling agent hydrogenation system and method for a small reactor, and relates to the field of cooling agent hydrogenation systems of nuclear power reactors. The system comprises a demineralized water supplying system and a hydrogen storing device, wherein the demineralized water supplying system comprises a demineralized water supplying device, a water pump and a demineralized water loop; the demineralized water supplying device and the water pump are sequentially connected through a pipeline; an inlet of the demineralized water loop is connected to an outlet of thedemineralized water supplying system, and an outlet of the demineralized water loop is connected to an inlet of a cooling agent system; an outlet of the hydrogen storing device is connected to the demineralized water loop. The system is simple in principle, compact in structure, applicable to a small reactor with limited space, and particularly a boron-free small reactor, and is high in operability, high in hydrogenation pressure, safe and efficient to convey.

The invention relates to a large-size disc brake thermal structure coupling loading method. The thermal structure coupling loading method is a displacement gradient iterative method, comprising a friction heat flux radial loading method and a friction heat flux circumferential loading method. That is to say, the friction heat flux generated in the cycle of each research area is loaded iterativelyalong the radial and circumferential directions of the brake disc respectively. Displacement gradient iterative method can be used to solve the problem of friction heat flux loading caused by the width of left and right area of large brake disc / brake pad and the radial difference of linear velocity under the influence of the width, and the temperature gradient produced alternately by contact surface and non-contact surface can not reflect the problem of thermal structure coupling model. The transient distribution of temperature field, stress field and deformation in all directions on the surface of brake disc can be solved accurately, which provides theoretical support for the optimization of large size brake disc design under complex working conditions.

The invention provides an electric heating heat storage incineration waste gas treatment device. The device comprises a furnace body, a PLC control mechanism, a remote monitoring mechanism, at least one electric heating rod, at least one temperature sensor, and multiple heat storage heat exchangers; the furnace body includes an oxidation chamber, multiple heat storage chambers, an intake port and an exhaust port; the electric heating rods and the temperature sensors are fixed in the oxidation chamber; the electric heating rods are connected with the PLC control mechanism; the temperature sensors are communicated and connected with the PLC control mechanism; the remote control structure is communicated and the connected with the PLC control mechanism; the oxidation chamber is communicated with all the heat storage chambers, and is positioned above the heat storage chambers; and the heat storage heat exchangers are arranged in the heat storage chambers. The electric heating heat storage incineration waste gas treatment device has the advantages of high safety and capability of remotely monitoring.

The invention aims to disclose a boron-free single lithium weak alkaline water quality regulating system and method suitable for a small-sized reactor. The system comprises a water replenishing and chemical adding module, a purification desalting module and a sampling analysis module; cooling water is replenished with water or chemicals through the water replenishing and chemical adding module, the cooling water is purified through the purification desalting module, and the cooling water before and after purification is detected and analyzed through the sampling analysis module to realize themeasurement of electrical conductivity and lithium concentration. The system can realize the purpose of adjusting primary circuit alkalescence regulation during reactor power operation so as to reduceprimary circuit equipment corrosion, ensure the integrity of primary circuit pressure boundary and fuel cladding, and reduce the radioactivity level outside a reactor core.

The invention discloses a rotating platform estuary plume test device and method. The rotating platform estuary plume test device comprises a rotating platform, a first water supply system, a second water supply system and a PIV-PLIF synchronous measurement system, wherein the first water supply system, the second water supply system and the PIV-PLIF synchronous measurement system are carried on the rotating platform. The first water supply system comprises a top water tank and an experiment water tank, and saline water in the top water tank enters the experiment water tank through a drainagepipe; the second water supply system comprises an estuary assembly and multiple groups of fresh water supply devices, the estuary assembly is arranged in the experimental water tank, and the multiplegroups of fresh water supply devices pump fresh water containing PIV particles into the estuary assembly; and the PIV-PLIF synchronous measurement system is used for measuring a flow velocity field and a concentration field of the fluid in the experimental water tank. The device is novel in design, simple in structure, high in integrity, wide in applicable working condition and high in test precision; and the evolution process of the plume interaction of the estuary of the rotating platform under influence of different inflow speeds, inflow densities, Coriolis forces and estuary distances canbe simulated.

The invention relates to an intelligent gasket with an anti-loosening function for monitoring a bolt fastening state and a monitoring method. The intelligent gasket comprises a metal upper piece, an insulating piece, a monitoring piece, a hyperelastic piece and a metal lower piece, the metal upper piece and the metal lower piece not only bear and prevent scratches, but also play a role in sealing protection, and the insulating piece and the hyperelastic piece are both made of insulating materials. And the monitoring circuit is not conducted with the metal upper piece and the metal lower piece. According to the requirements of different tightening torques, the structure and material parameters of the internal monitoring piece and the hyperelastic piece are adjusted, the good elastic recovery capacity of the hyperelastic piece is used for enabling the metal contact of the monitoring piece to make contact with or be separated from the metal lower piece when the bolt pre-tightening force changes, and the on-off state change of an internal monitoring circuit is achieved; and therefore, the connection state of the bolt is represented. Compared with a grating type, piezoelectric sensing type or resistance strain gauge type intelligent fastener, the intelligent gasket is low in cost and high in reliability, not only has an anti-loosening function, but also can effectively monitor the bolt fastening state to prevent connection failure.

The invention discloses a novel sliding block type bidirectional overrunning clutch. The novel sliding block type bi-directional overrunning clutch comprises an outer ring and sliding blocks. An inner ring support and a driving shifting fork are arranged inside the outer ring and fixed through check rings, close to the two ends, inside the outer ring. The inner ring support is provided with semi-circular groove rolling channels. The working face of each sliding block is arranged in the corresponding semi-circular groove rolling channel and is in contact with the corresponding semi-circular groove rolling channel. Each pair of semi-circular groove rolling channels and the pairs of sliding blocks are configured in opposite directions. The sliding blocks are in series connection through a spring to form an annular shape, and the sliding blocks are arranged in an annular space between an outer ring inner hole rolling channel and the inner ring support. The driving shifting fork is provided with shifting fork protruding claws. Each shifting fork protruding claw is inserted into a space between the corresponding sliding blocks which are arranged in opposite directions. The clutch has the beneficial effects of being reliable in bidirectional self-locking, precise in positioning and stable in operation; no impact or noise is generated in the releasing process; and the clutch is high in transmission efficiency and long in service life. In mechanical transmission, the clutch can be used for preventing reverse rotation bidirectionally; bidirectional rotation of a driving end can drive bidirectional rotation of a driven end; and the purpose of precise positioning or torque transmission or overrunning is achieved.

The invention provides a method for preparing an ultrafine glass fiber woven composite functional filter material for denitrification and dioxin, which comprises the following steps: (1) after mixing active metal catalyst powder and PTFE resin, respectively making catalyst-containing PTFE fibers and PTFE microporous films containing catalysts; (2) blending PTFE fibers containing catalysts with ultrafine glass fibers to make composite yarns, and weaving them into ultrafine glass fibers and catalytic PTFE fiber blending machines Weaving layer; (3) Mix the active metal catalyst emulsion and PTFE emulsion to make a mixed catalyst treatment solution, and then sinter at 300-350°C after overall impregnation of the ultrafine glass fiber and catalytic PTFE fiber blended woven fabric layer; (4) The sintered superfine glass fiber and catalytic PTFE fiber blended woven fabric layer and the PTFE microporous film containing the catalyst are simultaneously introduced into a thermal laminating machine for surface thermal pressing lamination. The invention can remarkably improve the filtration precision and the efficiency of denitrification and dioxin removal.

The invention discloses a pipeline type automatic constant-temperature device for high-pressure fluid. The pipeline type automatic constant-temperature device for the high-pressure fluid comprises an outer pipe sleeved with an inner pipe, a heating pipe and a thermoelectric couple, the inner pipe and outer pipe concentrically form an annular cooling water passage, two ends of the inner pipe protrude out of two ends of the outer pipe, one end of the outer pipe is provided with a tap water port with a flow regulating valve, and the end of the inner pipe protruding out of the end of the outer pipe is connected with a ferrule joint; a water drain hole is formed in the other end of the outer pipe, the end of the inner pipe protruding out of the end of the outer pipe is connected with the heating pipe, thermoelectric couple and a ferrule joint in sequence, the heating pipe is arranged in the inner pipe through a three-way ferrule joint, and a temperature control meter and a bidirectional triode thyristor are connected between the heating pipe and thermoelectric couple. The pipeline type automatic constant-temperature device for the high-pressure fluid has advantages of simple structure, precise control, high energy efficiency, high efficiency, low cost and the like.

The invention discloses a vertical type thrust sliding bearing. The vertical type thrust sliding bearing comprises a thrust head, a guide tile, a guide bearing seat, a thrust tile, a thrust disc and a high-pressure oil system, wherein the guide tile sleeves the outer part of the lower section of the thrust head; the guide tile is mounted in the guide bearing seat; the thrust tile and the thrust disc are mounted in the guide bearing seat and are located at the lower end of the thrust head; the high-pressure oil system comprises a thrust tile oil injection device, a high-pressure oil inlet pipe, a high-pressure oil ring pipe and splitters; one end of the high-pressure oil inlet pipe is communicated with the high-pressure oil ring pipe; the plurality of splitters are arranged and are mounted at the top of the guide bearing seat at intervals; the high-pressure oil ring pipe is communicated with the splitters; the thrust tile oil injection device comprises a plurality of high-pressure oil distribution pipes and a high-pressure oil integrated receiving pipe; one end of each high-pressure oil distribution pipe is communicated with the corresponding splitter and the other ends of the high-pressure oil distribution pipes are communicated with the high-pressure oil integrated receiving pipe; the high-pressure oil integrated receiving pipe is inserted into an oil hole of the thrust tile. The vertical type thrust sliding bearing disclosed by the invention is compact in structure, wide in applicable working condition range and high in economical efficiency.

The invention belongs to the field of energy source power engineering and relates to an auto-cascade heat pump circulating system. An outlet of a compressor is connected with an inlet of an oil-gas separator. An opening A, an opening B, an opening C and an opening D of a four-way valve are connected with an outlet of the oil-gas separator, a second end opening of an evaporator, an inlet of a gas-liquid separator and a first end opening of an air cooled condenser correspondingly. An inlet of a separation liquid storage device is connected with a second end opening of the air cooled condenser and a first end opening of the evaporator. A liquid phase outlet of the separation liquid storage device is connected with a first inlet of an evaporation type condenser through a first throttling assembly. A gas phase outlet of the separation liquid storage device is connected with a second inlet of the evaporation type condenser. A first outlet of the evaporation type condenser is connected with an inlet of the compressor. A second outlet of the evaporation type condenser is connected with a second end opening of an air cooled condenser and a first end opening of the evaporator through a second throttling assembly. The auto-cascade heat pump circulating system overcomes the existing theory limitation and technological bias and is wide in application working condition range, high in energyefficiency ratio and small in attenuation under the low-temperature working condition.

The invention discloses a suspension bracket device of an electric suspension test bed. The suspension bracket device comprises a suspension tray, a permanent magnet shell, an annular permanent magnet, a balance weight column, a balance weight block, a linear bearing and a guide rod. The annular permanent magnet is packaged in the suspension tray through the permanent magnet shell, the balance weight column is connected to the suspension tray, the balance weight block is installed on the balance weight column, the linear bearing is installed on the suspension tray, and the guide rod is inserted into a bearing hole of the linear bearing and can slide relative to the guide rod; the guide rod is fixed on the test bed through a mounting block at the bottom of the guide rod, the guide rod is inserted through a bearing hole of the linear bearing, the linear bearing can slide relative to the guide rod, the suspension frame performs a suspension experiment of moving in the linear direction through the linear bearing and the guide rod, and when the device is mounted on the horizontal test bed, the suspension tray moves in the vertical direction and suspends. The device can solve the problems that inventions are insufficient in the aspect of permanent magnet electric suspension technology tests and the theoretical research result of the technology cannot be verified, and the popularization of the technology is facilitated.

The invention discloses a slip boundary condition density flow and saline wedge generation experiment device. The slip boundary condition density flow and saline wedge generation experiment device comprises an experimental water tank, a conveying floor, a fixing floor, a water guide tank, a low-density water storage tank, a high-density water storage tank, a removable rectifying device, a diversion device, a water inlet tank, an external drainage pipe, a level baffle, a water outlet, a scale, a cross calibration line, a control valve, a flowmeter, a filter, a small water pump and a mixer. Theslip boundary condition density flow and saline wedge generation experiment device can be applied to slip boundary condition density condition experiment, saline wedge generation experiment and traditional continuous inflow density flow experiment, can eliminate lobe-and-cleft phenomena in the head area during density flow diffusion to simplify three-dimensional motion into two-dimensional motionand facilitate phenomenon mechanism analysis, and meanwhile, lay an experimental foundation for complicated three-dimensional analysis and allow conversion to saline wedge conditions through simple operation. Besides, the slip boundary condition density flow and saline wedge generation experiment device is flexible in component combination design and wide in applicable condition range.

The invention provides a preparation method of a filtering material possessing desulphurization efficacy, which comprises the following steps: 1)active metal catalyst powder and PTFE resin powder are mixed and respectively prepared to catalyst-containing PTFE fiber and catalyst-containing PTFE micropore film; 2) catalyst-containing PTFE fiber and high-strength PTFE fiber employs an alternative arrangement mode with 1-10: 1-10 to prepare warp beam, a PTFE base cloth layer is prepared by employing a machine knitting mode; 3)the base material and catalyst-containing PTFE fiber are mixed, and then placed in a needle loom with the PTFE base cloth layer to prepare PTFE composite needled felt; 4)an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixing treatment fluid, the PTFE composite needled felt is performed with integral dipping treatment and sintered at temperature of 280-350 DEG C; and 5)the sintered PTFE composite needled felt and the catalyst-containing PTFE micropore film are simultaneously introduced into a heat film covering machine, and the surface is performed with hot pressing and laminating. According to the invention, filtration accuracy as well as desulphurization efficiency can be greatly increased.

The invention discloses a radial sliding bearing dynamic characteristic testing device based on non-contact electromagnetic vibration exciters, which is characterized in that four sets of electromagnetic vibration exciters which are orthogonally distributed along the circumferential direction of a rotor are respectively arranged at two ends of the rotor, the electromagnetic vibration exciters are in clearance fit with the rotor, and a clearance is also formed between the adjacent electromagnetic vibration exciters; a force sensor is arranged between each set of electromagnetic vibration exciter and a stator support; the positions, which are close to the electromagnetic vibration exciters, of the two ends of the rotor are each provided with at least two orthogonally-distributed displacement sensors, controllable and non-contact electromagnetic excitation force or electromagnetic torque is applied to the rotor through the electromagnetic vibration exciters, the radial displacement of the rotor under the action of radial electromagnetic force or electromagnetic torque is detected through the displacement sensors, and the controllable non-contact excitation and dynamic characteristic test of the radial sliding bearing is realized. The device can realize controllable non-contact excitation and vibration response detection of the radial sliding bearing, and can be used for measuring the dynamic characteristic coefficient of the radial sliding bearing.

The invention provides a wharf platform pipeline cold insulation system and method of an offshore LNG receiving station. The system is provided with ship unloading arms, ship unloading branch pipes, ship loading arms, ship loading branch pipes, a ship loading gas return arm and a ship unloading gas return arm. The ship unloading branch pipes are provided with ship unloading branch pipe cutoff valves and are further connected with ship unloading evacuation branch pipes and ship unloading emptying branch pipes. The ship loading branch pipes are provided with ship loading branch pipe cutoff valves and are further connected with ship loading evacuation branch pipes and ship loading emptying branch pipes. The ship unloading evacuation branch pipes and the ship loading evacuation branch pipes communicate to a wharf emptying tank through an evacuation main pipe in a converged manner. The ship unloading emptying branch pipes and the ship unloading emptying branch pipes communicate to the wharfemptying tank through an emptying main pipe in a converged manner. The wharf emptying tank communicates with a BOG gas return main pipe through a wharf emptying tank gas phase balance line. The system has a ship unloading mode, a non-ship-unloading natural evaporation cold insulation mode and a non-ship-unloading pump circulating cold insulation mode, and cold insulation feasibility and reliability of a wharf platform of the offshore LNG receiving station can be guaranteed.

The invention provides a preparation method of a filter material with denitration and dioxin-removal effects. The preparation method comprises the following steps: (1) after an active metal catalyst powder and PTFE resin powder are mixed, catalyst-containing PTFE fiber and a catalyst-containing PTFE micro-porous membrane are respectively prepared; (2) the catalyst-containing PTFE fiber and high-strength PTFE fiber are made into warp beams by a 1-10:1-10 alternate arrangement mode, and a PTFE base cloth layer is prepared by a weaving mode; (3) the catalyst-containing PTFE short fiber and a base material undergo composite acupuncture or spunlace on the surface of the PTFE base cloth layer so as to prepare a PTFE felt layer; (4) an active metal catalyst emulsion and a PTFE emulsion are mixed to prepare a catalyst mixed treating fluid, and the PTFE felt layer undergoes mass-impregnation treatment and then is sintered at 300-350 DEG C; and (5) the sintered PTFE felt layer and the catalyst-containing PTFE micro-porous membrane are simultaneously introduced into a hot laminator to undergo surface hot-press lamination processing. According to the invention, filtration accuracy and denitration and dioxin-removal efficiency can be enhanced remarkably.