96results about How to "Avoid dead zone" patented technology

The invention discloses a forging method for high temperature resistance titanium alloy large-size bars used for engines. The method comprises following steps: firstly, performing three-heating cogging and forging on ingot casting then performing multi-heating isothermal reforging on the forging stock at two-phase region; Finally, heating at 60 DEG C to 80 DEG C under phase transition point, , to obtain WSTi64311SC titanium alloy bars. According to the method of the invention, octagonal forging is carried out on the forging process of each heating of WSTi64311SC titanium alloy bars so as to avoid non-uniform deformation or dead zones; blank material is wrapped by asbestos so as to avoid cracks due to temperature reduction in the blank material. Besides, three-heating cogging is carried out above the phase transition point so as to guarantee uniform organization of the blank materials; the large size WSTi64311SC titanium alloy bars having uniform and blurred macrostructure and equiaxial and fine microstructure are obtained.

The invention relates to a dual fluid nozzle atomizing and cooling closed system for a high-power solid laser. In the system, an open pore on the gas exhaust pipe of a compressor is connected with the gas phase inlet of a heat exchanger through a second control valve; the gas phase outlet of the heat exchanger is connected with a dual fluid nozzle chamber; the gas exhaust pipe of the compressor is connected with the input end of a condenser; the output end of the condenser is connected with the input end of a liquid accumulator; the output end of the liquid accumulator is connected with the liquid chamber of the dual fluid nozzle through a first control valve; the nozzle of the dual fluid nozzle stretches into a heat sink; the heat sink is connected with the gas-liquid two-phase inlet of the heat exchanger through a gas exhaust pipeline and a liquid discharge pipeline; and the superheated steam outlet of the heat exchanger is connected with a gas suction pipe of the compressor. The closed cooling system realizes organic combination of a refrigerating system and an atomizing system; gas is input into the gas exhaust pipe of the compressor, so that the defects of introducing a second fluid from outside are overcome; an air pump is saved and the system is simplified; the nozzle replaces a throttle device; and the system can meet the requirement of lower temperature of hot faces.

The invention provides a method for overcoming a motor dead zone and improving radar tracking precision in a speed ring, and aims at providing a method capable of timely removing the motor dead zone and effectively improving the radar tracking precision. According to the technical scheme, the method comprising the following steps: containing a current ring into a driver in a tracking radar servo control system that performs control by three rings, namely, the current ring, a speed ring and a position ring; receiving and implementing a control command sent by a radar terminal system and error information sent by a radar information processing system through a built-in operation processor of a servo controller; performing proportional-integral (PI) correction for the error in a loop circuit through a built-in motor dead zone detection software procedure in the speed ring of the operation processor; sending output voltage that is in direct proportion to the speed of a motor to the driver to drive a radar antenna to move; immediately outputting and compensating voltage of the same polarity to the speed ring of the servo controller while the speed ring of the servo controller is beyond the index as specified and the antenna is unmoved.

The invention discloses a large-scale multi-pulse modulation femto-second laser absolute distance measurement device and method and belongs to the field of femto-second laser distance measurement. According to the invention, the device includes a femto-second laser source, an atomic clock, a Michelson interferometry ranging device, a wave plate HWP4, a PBS (Polarized Beam Splitter), a balance optical cross-correlation assembly, a photoelectric detection device, a servo control device and a frequency counter. The device also includes a single-mode long optical fiber in a length m and a wave plate HWP5. The invention also discloses the large-scale multi-pulse modulation absolute distance measurement method implemented based on the femto-second laser absolute distance measurement device. According to the invention, the length of a reference arm in the Michelson interferometry ranging device is not needed to know and absolute distance measurement of a continuous range based on a flight time method is realized. The application range of femto-second laser absolute distance measurement can be expanded and the invention has a good application prospect in engineering fields such as femto-second laser distance measurement and the like.

The invention discloses an ultrasonic scalpel. The ultrasonic scalpel comprises a handle, a middle rod, a rear bending connecting part, a rigid cutter bar, a cutter head and a front bending connecting part, wherein the rear bending connecting part is arranged between the handle and the middle rod; the rigid cutter bar is connected with the middle rod; the front bending connecting part is arranged between the rigid cutter bar and the cutter head; a front bending part and a rear bending part comprise a plurality of joint sheets and four transmission steel wires for connecting the plurality of joint sheets in series; the middle rod is provided with an accommodating cavity; a piezoelectric transducer is arranged in the accommodating cavity; a tail mass block is positioned at the rear end of the piezoelectric transducer; the middle rod is connected with the rigid cutter rod through an ultrasonic amplifier; and a locking device for maintaining the bending angle after the front bending connecting part and the rear bending connecting part are bent is arranged on the middle rod. According to the ultrasonic scalpel, the tail mass block is arranged on the rear part of the piezoelectric transducer, so the defect of ultrasonic energy attenuation caused by the bending parts is overcome and the cutting effect is guaranteed.

The invention relates to an evenly distributed chlorine anti-blockage boiling chlorination furnace bottom which can solve the problems of blockage of a sieve plate of the existing boiling chlorination furnace and channeling and dead zones of airflow, a support sleeve is arranged at the middle part of an outer shell of the furnace bottom, an isolation plate is arranged on the support sleeve, a plurality of chlorine distribution pipes are evenly distributed on the isolation plate, whirlpool rods which can ascend, descend and rotate freely are arranged in the chlorine distribution pipes, and an annular chlorine pipe is arranged in the outer shell of the furnace bottom. A fixed sleeve is arranged at the periphery of the isolation plate, and refractory fillers which consist of fireclay refractory materials containing 45 percent-70 percent silicon oxide are filled among the chlorine distribution pipes in the fixed sleeve. A slag discharge pipe is penetrated in the refractory fillers, the isolation plate and the middle part of the furnace bottom. The adoption of the boiling chlorination furnace bottom can lead chlorine to enter the chlorination furnace in the whirlpool form, form a stable flow layer in the furnace, realize the large-scale chlorination furnace and the stable operation, solve the problems of material leakage and blockage of the sieve plate and prevent the occurrence of channeling and dead zones.

The invention provides a large-flow high-stability Mach number wind tunnel rapid adjusting system and method based on a temporary charging air source. The large-flow high-stability Mach number wind tunnel rapid adjusting system structurally comprises a temporary charging air source, a main valve, an auxiliary valve, a spraying pipe, a pressure sensor, a Mach number sensor and a control unit, and the auxiliary valve has the faster small-flow adjusting capacity and is connected with the main valve in parallel. The method comprises the following steps: (1) on the basis of 50% opening degree of an auxiliary valve, carrying out main valve manual adjustment on a characteristic Mach number point in a wind tunnel capability range to obtain a main valve opening degree and air source pressure relation curve cluster under a corresponding Mach number; (2) according to the instruction Mach number and the current air source pressure, obtaining the opening degree of a main valve through two-dimensional linear interpolation; and (3) carrying out closed-loop PID adjustment of the instruction Mach number by using the auxiliary valve, and maintaining the outlet Mach number. According to the invention, a composite control strategy of main valve feedforward and auxiliary valve closed-loop PID is adopted, and the problem that an outlet Mach number is not easy to stabilize due to continuous decrease of gas source pressure, poor repeatability of a main valve, strong nonlinearity and slow adjusting speed in a wind tunnel test is solved.

The invention discloses an axial and radial reactor of a fixed bed with tube bank wall type internal and external barrels. The axial and radial reactor consists of a pressure-bearing shell, and a catalyst barrel part arranged in the pressure-bearing shell, the catalyst barrel part consists of an internal part bottom support, a catalyst external barrel, a catalyst internal barrel and a catalyst top annular grating, and each of the catalyst external barrel and the catalyst internal barrel comprises a plurality of heat exchange tubes or a plurality of round rods which are distributed circumferentially at intervals. The axial and radial reactor has larger aperture ratio, and avoids catalyst dead zones in bed layers by adopting the catalyst external barrel and the catalyst internal barrel each of which comprises a plurality of heat exchange tubes or a plurality of round rods which are densely distributed circumferentially at intervals, and bed layer resistance reduction is controlled by an opened barrel welded in the catalyst internal barrel. The reactor has the following characteristics of being capable of utilizing the catalysts to the maximum extend, being applicable to small-size catalysts, being convenient to manufacture and large-scale due to simple structure of the internal and external barrels, and being small in resistance reduction when reactive gas flows axially and radially.

The invention discloses a prying type super-critical pressure concurrent steam injection boiler used for oil field crude oil thermal recovery. The boiler comprises a boiler main body, the boiler main body is divided into a radiation heating surface and a convection heating surface, the water cooling wall of the radiation heating surface adopts a spiral coil wound by adopting a single tube, and is closely fitted with the boiler wall, and a burner is arranged at the center of the boiler wall; a chimney is arranged above the convection heating surface, the convection heating surface is a snake-shaped convection bank wound by adopting a single convection heated tube, and the convection bank is arranged in a staggered way; and the convection heating surface is divided into two parts of an A and a B by a fume dividing duct separating plate; the heating surfaces of the boiler adopt the two stage arrangement of the radiation heating surface and the convection heating surface, the design concept of the fume dividing duct separating plate is adopted, and thereby the cross-section area of the fume flow is reduced, the fume flow speed is quickened, the convection heat transfer coefficient is increased, the heat transmission is strengthened, and on the conditioning of the feed water quality, the combined conditioning of a deaerator, a novel reverse osmosis membrane and an EDI (electrodialysis) separating equipment is adopted.

A form seal for sealing an annular gap between an outer peripheral wall and an inner peripheral wall with respect to a medium comprises: an elastic, annular sealing body (3) to be radially clamped in, with an annular, outer radial sealing face (32) for lying in contact with the outer peripheral wall (2), an annular, inner radial sealing face (31) for lying in contact with the inner peripheral wall (1), an annular, media-side top face (33), which extends between the outer radial sealing face and the inner radial sealing face, an annular bottom face (34), which extends between the outer sealing face and the inner sealing face on the side remote from the top face (33), and at least one annular recess (36) in the bottom face for receiving an anchoring ring (44), the recess having at least one undercut.

The invention relates to a mould for a multi-blank equal-channel angular welding extruded molded pipe. An end face of one end of a convex mould is connected with one end face of a liner of an extruding cylinder; the end face of the other end of the convex mould is connected with one end face of a concave mould; during a connecting process, an outlet of each metal flowing channel in the liner of the extruding cylinder is butt-jointed with an inlet of each metal flowing channel on the end face of the matching end of the convex mould; a sized rod at the center of the end face of the matching end of the convex mould and the concave mould is embedded into a welding chamber at the center of the concave mould; and a clearance between the sized rod and the concave mould is as thick as the wall of the formed pipe. According to a method of changing a split-flow mould into the multi-blank entering welding chamber, the blanks are independent from each other, are subjected to equal-channel angular deformation before alloy enters the welding chamber and are welded and extruded after the alloy enters the welding chamber; the alloy split-flow process is efficiently avoided; and the extrusion force is concentrated on equal-channel angular refined grains and welding process, the welding quality is better and the grain size of the products is smaller, so that the better extruded products are obtained.

The invention relates to a horizontal etherification reactor, in particular to a horizontal etherification reactor for producing cellulose by a semidry process and a dry process, which pertains to the technical field of chemical machinery, wherein, a reactor body is arranged in a cylindrical body which is connected and fixed with an under frame; a rotation mixing shaft is arranged in the center of the reactor body; the two ends of the mixing shaft are respectively sheathed on a left-end shaft sealing box and a right-end shaft sealing box; a right bearing holder is connected with a reducer by a coupler; the reducer is connected with a motor and fixed on a motor base. The horizontal etherification reactor is characterized in that a plurality of coulter-typed mixers are arranged on the mixing shaft in a staggered manner and distributed by unequal intervals along the axes of the mixing shaft and the distribution angle is 90 degrees or 120 degrees. The coulter-typed mixers consist of paddle arms and coulter-typed blades, and the coulter-typed blades are arranged on the paddle arms. The horizontal etherification reactor has uniform mixing effect and good heat exchange performance and can effectively improve the output of a single reactor and product quality while shortening the handing time of the technique.

The invention relates to a diketene preparation device and a diketene preparation method. The diketene preparation device comprises an acetic acid evaporator, a mixer, a cracking furnace, a quenching condenser and an absorption tower. The outlets of the acetic acid evaporator and the mixer are connected with the cracking furnace; the cracking furnace is then connected with the multi-level quenching condenser; the quenching condenser is then connected with the absorption tower; one branch of the absorption tower is connected with a polymerization tank, and the other branch of the absorption tower is connected with a water absorption tower; and the outlet of the third-level quenching condenser is connected with the quenching condenser behind through a liquid ring pump. The diketene preparation device and diketene preparation method provided by the invention have the beneficial effects that when the cracked gas is pressurized, the impurities such as acetic acid, water and acetic anhydride in the cracked gas can be condensed out more sufficiently, and thus the quality of the cracked gas before entering the absorption tower is improved while the freezing level is lowered; and compared with the traditional technology in which the energy consumption accounts for 45% of the total cost of diketene, the device and method provided by the invention have the advantage that the energy consumption only accounts for 25% of the total cost of diketene through improvement.

The invention provides a reverse starting and line selecting method suitable for a high-resistance grounding fault of an asymmetric power grid. In operation of a power distribution network, neutral point displacement voltage UN of a power distribution network and zero sequence current In0 of each feed line are detected in real time. If a stable change of the neutral point voltage UN of the power distribution network occurs in a time period deltaT, and continuous increment of the neutral point voltage UN of the power distribution network reaches a certain value, deltaUN can be a forward increment (deltaUN>0) or a reverse increment (deltaUN<0), but when the change amplitude satisfies |deltaUN| >=Udelta and the zero sequence current increment in a random feed line in the power distribution network satisfies deltaI0>Idelta and imax0>=i0B, the single-phase high-resistance grounding fault of the power distribution network is determined. Hereon, a grounding fault processing device performs fault starting and processes the single-phase grounding fault. Hereon the feed line with highest zero-sequence current increment in the lines is the line in which single-phase grounding occurs.

The invention provides a pollination robot mechanical arm obstacle avoidance path planning method and device. The method comprises the steps that a depth image is acquired through a depth camera, andan obstacle pose and a pollination target point pose of a mechanical arm are acquired according to the depth image; an initial path is acquired through a three-dimensional RRT algorithm with linear regression; the three-dimensional RRT algorithm is optimized through an A* algorithm to obtain an optimal path; and track smoothing is conducted on the optimal path through an artificial potential fieldmethod, so that a final path is acquired, and the mechanical arm is controlled according to the final path. According to the method, the three-dimensional RRT algorithm with the linear regression isadopted, the purposiveness of RRT three-dimensional space exploration is further enhanced, an exploration direction is developed towards a wide place more easily, the problem of falling into a local minimum value can be well avoided through the artificial potential field method combined with the three-dimensional RRT algorithm optimized on the basis of the A* algorithm, and a track is smooth, so that moving among branches of the mechanical arm is facilitated, and the pollination reliability of a robot is improved.

The invention belongs to the technical field of simultaneous hierarchical measurement of sludge and water levels and provides a device for simultaneous hierarchical measurement of water level and water-mud mixture level. The device is capable of realizing real-time detection in complex environments, high in measurement precision and safe and convenient to use. The technical scheme includes an infrared emitter and an infrared receiver are fixed between a first mounting fixing plate and a second mounting fixing plate by screws, the infrared emitter is connected with a power line through a mainframe, the infrared receiver is connected with the mainframe through a signal line, and the mainframe is connected with external equipment through the power line and the signal line. The device for simultaneous hierarchical measurement of the water level and the water-mud mixture level is applicable to the field of coal mines.

The invention discloses a preparation apparatus and a preparation method for a gel polymer lithium ion battery. The preparation apparatus comprises two first containers, two second containers, two groups of first pulley groups, two groups of second pulley groups, an extrusion roller and a winding apparatus, wherein the two first containers are filled with an electrolyte; the two second containers are filled with a gel electrolyte precursor solution; the two groups of first pulley groups are wound with a positive plate and a negative plate respectively; when the first pulley groups turn, the first pulley groups drive the positive plates and the negative plates to be wetted in the electrolyte; the two groups of second pulley groups are wound with diaphragms respectively; when the second pulley groups turn, the second pulley groups drive the diaphragms to be wetted in the gel electrolyte precursor solution; the extrusion roller enables the positive plate, the diaphragm, the negative plate and the diaphragm which are wetted to be extruded together in sequence; and the winding apparatus is used for winding the extrusion material so as to assemble the battery. The preparation apparatus and the preparation method provided by the invention are used for solving the technical problem of low reliability of the battery caused by the reason that the positive and negative plates cannot be well wetted by the electrolyte and by a plurality of shortcomings existing in the thermal polymerization process; and in addition, a technical effect of improving the reliability of the battery is realized.

The invention discloses a three-phase fluidized-bed reactor. The three-phase fluidized-bed reactor solves the technical problems of poor gas-water mixing, difficult operation, undesirable solid-liquid separating effect and high effluent turbidity of an internal circulating three-phase fluidized-bed reactor. The three-phase fluidized-bed reactor comprises a gas-water mixing area, a reacting area, separating area and a filtrating area; the gas-water mixing area is, through a micro-porous gas distributor, communicated with the reacting area which is formed by an outer barrel and an inner barrel; a precipitating area and the filtrating area are formed outside the separating area on the top and communicated with each other through a perforated plate; the filtrating area is provided with a filtering component; and the filtrating component is connected with a water outlet and back wash system which comprises a water pump, a plurality of valves, a plurality of flowmeters and the like. The three-phase fluidized-bed reactor is characterized in that: the gas-water mixing area is shaped as a column; and the filtering component is a film component. The three-phase fluidized-bed reactor is used for treating the domestic sewage and the industrial effluent, so the municipal sewage is recycled to meet the municipal non-drinking water quality standards.

The invention includes a boiler body having radiation and convection heating surfaces. The radiation heating surface is a cylinder body coiled by a single radiation heating tube and the convection heating surface is a coiled tube bundle coiled by a single convection heating tube. One end of the radiation heating tube is used as a water inlet and the other end is in communication with a discharging tube of the radiation heating pipe. The discharging tube of the radiation heating tube is in communication with the convection heating tube. The boiler body is made up of three layers. The inlayer is a corrugated plate made of alumina silica refractory ceramic fibre by pressing, the middle layer is a insulation one and the other layer is an infrared-proof coating.

The invention relates to a magnetostrictive displacement sensing flowmeter. The magnetostrictive displacement sensing flowmeter comprises a sensor electronic bin, a transitional joint, a groove cover, an overflow groove, a metering barrel, a valve block, a damping washer, a straight joint, a measuring wave guide tube and a magnetic ring buoy. The magnetic ring buoy is driven to move in the up-down direction by change of the liquid level of leakage oil, a magnetostrictive effect of a magnetostriction material is achieved, the measuring wave guide tube deforms elastically so that a mechanical wave which is expanded towards two sides is generated, the mechanical wave is received by the sensor electronic bin which is connected with the upper end of the measuring wave guide tube and is converted into an electric signal, and the volume flow of the leakage oil is calculated by comparison and conversion. Owing to the magnetostrictive effect, the magnetostriction property of the magnetostrictive displacement sensing flowmeter is not changed along with time. The magnetostrictive displacement sensing flowmeter has the advantages of high stability, high reliability, high response speed, high resolution precision, non-contact measurement, zero abrasion, long service life and the like. Moreover, the magnetostrictive displacement sensing flowmeter is particularly suitable for measuring micro flow.

The invention provides a plate sheet used for a waste heat recycling device. The plate sheet comprises a plate body, wherein the plate body is divided into a distribution area and a heat transmission area; the distribution area and the heat transmission area are respectively provided with ripples; the ripples comprise a first group of ripples which are distributed at the distribution areas at two ends of the plate body and a second group of ripples distributed at the heat transmission area of the plate body; wherein the distances t1, t2, t3 and t4 between adjacent ripples of the second group of ripples at the heat transmission area are arranged from small to large in sequence. As the distances between adjacent ripples of the second group of ripples at the heat transmission area are arranged from small to large in sequence, mediums flow through the ripples after entering the heat transmission area and flow through the distances from small to large, the pressure of the mediums is released gradually, the pressure that a corrugated plate bears is reduced, so that the bearing ability of the corrugated plate is increased greatly.

The invention discloses a glass reactor device, which comprises a reactor body, a reactor cover arranged on the opening of the reactor body, a bracket arranged on one side of the reactor body and the reactor cover, a motor arranged on the reactor cover and a mixer arranged in the reactor body. The motor is connected with the mixer through a coupling. The glass reactor device is characterized in that the outer wall of the reactor body is provided with a hoop rack, and the hoop rack is tightly connected with the outer wall of the reactor body and is connected with the bracket in a rotating way. In addition to the opening on the top part of the reactor body, the lower part and the bottom of the reactor is provided with no discharging port, materials are poured out through the opening on the top part of the reactor body, and thus the material leakage and dead zones in the reactor can be avoided. The invention has the advantages that no dead zone is formed in the reactor body, material leakage cannot be caused, and the device can be cleaned and operated conveniently.

A touch sensing device comprises a plurality of first touch electrodes and a plurality of second touch electrodes located in an active area of the touch sensing device, the plurality of first touch electrodes and the plurality of second touch electrodes arranged in a first direction. The touch sensing device also includes a plurality of third touch electrodes located in the active area and arranged in a second direction that crosses the first direction. The first touch electrodes, second touch electrodes, and third touch electrodes have a first resolution for sensing touch in the active area. The touch sensing device also includes a plurality of combination touch and fingerprint electrodes located in the active area, the plurality of combination touch and fingerprint electrodes having a second resolution for sensing both touch and a fingerprint in the active area and the second resolution being higher than the first resolution.

The invention relates to the technical field of equipment for the coal mining industry and provides a center drive type foam scraper. The center drive type foam scraper comprises a scraping plate, a driving device and a rotating sleeve. The driving device comprises a variable-frequency motor, a driving bevel gear and a driven bevel gear, the variable-frequency motor is connected with the driving bevel gear to drive the driving bevel gear to rotate, and the driving bevel gear is meshed with the driven bevel gear to realize motion transmission. The rotating sleeve externally sleeves a central rotating shaft of a flotation machine, the driven bevel gear externally sleeves the rotating sleeve to drive the rotating sleeve to move circularly around own axis, and the rotating sleeve is connected with the scraping plate which rotates along with the rotating sleeve. The center drive type foam scraper is integrally stable in operation, foam viscosity is reduced, the foam discharge rate is increased, normality in next operation is guaranteed, flotation effects are guaranteed, and the ore dressing recovery rate is increased.

The invention discloses a reactor core of a molten salt reactor. The reactor core of the molten salt reactor comprises an active region and a reflecting layer, wherein the reflection layer covers theactive region; the active region is formed by fuel assemblies through array assembling; the volume of the active region molten salt passage accounts for 2 to 25 percent of the volume of the active region; the active region comprises a center region and an edge region; the volume ratio of the center region to the edge region is 1 / 15 to 1 / 8; the volume of the single molten salt passage of the centerregion accounts for 40 to 50 percent of the volume of the single molten salt passage of the edge region; the cut edge is the arc cut side edge. The molten salt passage of the reactor core of the molten slat reactor is positioned at the side edge position of the fuel assembly; the space self shielding effect regulation range is large; the deformation stress caused by radiation can be reduced; a narrow seam and the molten salt passage are communicated so that the reactor core molten salt can realize the transverse flow mixing; the heat transfer is facilitated; a dead region is avoided; the fastneutron radiation rate of graphite in the reactor core center region is reduced; the service life of the reactor core is prolonged; opening collecting structures at the two ends of the assembly can realize the flow rate distribution regulation; the fast neutron injection quantity of the upper and lower cavity alloy is reduced.

An air inducing heat radiation device of a wind driven generator cabin comprises an air collection pipe, an external air inlet pipeline, an air flow adjusting valve and an internal ventilation pipeline. The air collection pipe is connected with the external air inlet pipeline. The air collection pipe and the external air inlet pipeline are fixed to a cabin shell through a support. An opening is formed in the rear half part of the cabin shell, and the external air inlet pipeline penetrates the opening of the cabin shell to be connected with the internal ventilation pipeline. The air flow adjusting valve is arranged at a hole of the cabin shell. An air outlet is formed in the cabin shell. The air inducing heat radiation device of the wind driven generator cabin is high in heat radiation efficiency and good in cooling effect.

The invention relates to a method for electrolytically preparing magnetic copper powder, which comprises the following steps: adding the stainless steel powder into a diaphragm chamber, agitating the stainless steel powder to lead the stainless steel powder to be in a fluid state, thereby forming suspension liquid; then taking a graphite electrode and the stainless steel powder in the suspension liquid as cathodes, taking sulfuric acid and copper sulfate solution as electrolyte and taking the graphite electrode placed outside the diaphragm chamber as an anode; and collecting the obtained magnetic copper powder by adopting a magnetic method after the completion of electrolysis. Compared with the traditional electrolytic copper powder process, the substitution method for preparing copper-coated iron particles and the wet recovery copper process, the method has low cost and high efficiency and is convenient for large-scale industrial application; and the magnetic copper powder obtained by the method can be used for the chemical industry, the metallurgy industry and other industries and can be recovered and reused by adopting the magnetic method.

The invention discloses a two-tier fluidized bed comprising an upper part, a lower part, an air inlet and an air outlet. A distributing plate for holding material is transversely arranged in each of the upper part and the lower part. The air inlet is disposed on the sidewall of the lower part below the distributing plates. The air outlet is disposed above the upper part. A vortex guide plate is disposed at the air inlet. Each distributing plate is provided with air holes which are staggered. The vortex guide plate allows hot air, entering the bed, to be diverted along the vortex guide plate, and thus, the problem of uneven heating caused by direct blow of the hot air is avoided, heat utilization rate of the bed is increased and drying efficiency is good; the bed is simple in structure, convenient to mount, easy to maintain and cost saving.

The invention belongs to the technical field of space volume rate or loading rate accurate measurement, and discloses a laser measuring device and a measuring method. The device and the method mainlysolve the technical problem that the measuring efficiency is low when a self-developed laser measuring device is used for measuring the volume rate of the space or the loading rate of the carriage ofa truck. The laser measuring device comprises a laser emitting mechanism, a vertical rotating mechanism, a horizontal rotating mechanism and a bracket. The vertical rotating mechanism, the horizontalrotating mechanism and the laser emitting mechanism are arranged on the bracket. The vertical rotating mechanism is connected with the laser emitting mechanism and drives the laser emitting mechanismto rotate. The horizontal rotating mechanism is connected with the bracket and drives the bracket to rotate. The measuring working efficiency of the laser measuring device can be effectively improved.Meanwhile, the laser measuring device can also be installed on the top of the measured space to carry out the up-down measurement operation. The dead zone of the measured space is reduced.

The invention discloses a driven decoupling mechanism aimed at rope kinematic coupling and a decoupling method thereof, and relates to a multi-joint rope-driven tandem mechanical arm system. The mechanism comprises a fixed wheel, a follower wheel, a driving wheel, a guide pulley and uncoupling ropes, wherein the driving wheel is connected with a joint connecting rod; the fixed wheel is connected with a joint base; the follower wheel is driven through utilizing the forward and reverse winding of the uncoupling ropes, so that the motion speed of the follower wheel is one second the rotation speed of the joint connecting rod; a driving rope of a joint at the back end is wound in the forward and reverse directions of rope guide grooves in the follower wheel, so that the displacement change of the driving rope caused by rotation of the joint connecting rod and the displacement change caused by rotation of the follower wheel counteract with each other; the driving rope passing through the uncoupling mechanism and the joint connecting rod do not have relative displacement, so that the kinematic uncoupling of the rope is achieved; the uncoupling mechanism can work in the temperature of 0 to 300 DEG C, the working range is wide, and the structure is simple, compact and reliable; and the rope kinematic uncoupling mechanism and the rope driving joint are mounted in a matching manner, so that the modularization can be achieved, and the application range is wide.