192results about How to "Safe and reliable performance" patented technology

The present invention relates to a heat pipe type spherical disc type solar energy light and heat collector, belonging to the solar energy heat collection establishment technical field, which includesa spherical reflecting mirror disposed on the solar energy optical tracker system and a steam drum supported above the reflecting mirror. The steam drum is made up of an inlet and an outlet and stored up with working medium. A heat pipe type vacuum heat collecting pipe is arranged on the focusing part of the spherical reflecting mirror. The heating zone of the heat pipe type vacuum heat collecting pipe is positioned on the condensing wimble of the spherical reflecting mirror. The cooling zone of the heat pipe type vacuum heat collecting pipe is inserted into the working medium of the stream drug. The invention has simple technology, low cost, scientific design and easy to generalization and application. It has been found that the invention has fast tempera the rise, excellent heating effect, high efficiency, suitable for large scale industrialization production, secure and reliable performance.

The invention provides a solid energy saving screw cleaning agent which can prepare non-corrosive and non-abrasive energy saving screw cleaning material. The raw material formula of the cleaning agent is as follows by weight percentage: 40-60% of matrix resin, 30%-40% of modified powder and 10-20% of auxiliary agent, and the sum of the weight percentage of all the components is 100%; the auxiliary agent is a cleaning surface, a surface active agent, a lubricating agent, a forming agent and a blowing activator; the raw material formula of the modified powder is as follows by weight percentage: 83-97% of inorganic powder, 2.0-8.0% of dispersing agent and 1.0-5.0% of coupling agent. According to the proportion of the formula, the matrix resin, the prepared modified powder, the cleaning agent, the surface active agent, the lubricating agent, the forming agent and the blowing activator are added into a high-speed mixer, and then are extruded and formed by an extruder to obtain the solid screen cleaning agent.

The invention discloses an assembly process of a cylindrical lithium-ion cell. The assembly process comprises the steps of (1), ultrasonically flattening two ends of a winding core; (2), wrapping two ends of the winding core with bottom adhesive tapes; (3), inserting the winding core into a shell; (4), welding a combined body of a flow collection plate and a cover plate on two ends of the winding core; (5), bending a flow collection plate lug; (6), bending the cover plate; (7), forming a lug; (8), embedding the cover plate; and (9), welding the cover to the shell through laser. The assembly process of the cylindrical lithium-ion cell is standard and normal in process; due to adoption of the combination of the flow collection plate and the cover plate, the combined cover plate is welded to the two ends of the winding core, so that the time for shaping the lug is shortened; due to the adoption of a welding manner of ultrasonically flattening and welding two ends through laser, the winding core is inserted into the shell, and then two ends of the winding core are welded, so that the bending and abrasion of the winding core plug are reduced; the yield of subsequent periphery welding is improved, thereby ensuring that the product performance is safer and more reliable.

The gravitationally balancing vertical ship elevator for launching and upsloping ship in ship yard includes tower columns on two sides, driving pulley devices on the tower columns, steel cables configured in the driving pulley devices and with one end connected to the under carriage inside the tower column and the other end connected to balance weight, and locking device inside the tower column and fitting the under carriage, as well as floating pontoon, which is connected via movable connecting device to the under carriages and has ballast tanks connected with water feeding and draining device. The present invention completes the ascent and descent of ship in gravity balancing mode and converts the gravitational potential energy to reduce the needed driving power for the ship ascending process. The present invention has the advantages of reduced and simplified driving configuration, low power consumption, and low cost, etc. and is especially suitable for launching and upsloping ship in steep berth.

The invention provides a Z2CND18-12N control nitrogen stainless steel forging technology relates to the processing method of stainless steel material. The invention uses raw materials controlling chemical compositions and selects lower solid solution treatment temperature through three-section temperature rise method and heat treatment. The temperature rise speed in the heat treatment is not greater than 150 degrees centigrade and the heat holding time is calculated according to 1.5min/mm and not less than 2.5h. The Z2CND18-12N control nitrogen stainless steel forging material processed by the method of the invention has strength above 460Mpa stably at high temperature of 350 DEG C to meet the component manufacturing requirements of nuclear power industry. The processing method is applied for manufacturing important components such as nuclear power pipe flange.

The invention relates to a preparation method for a diamond cutting grinding piece. The diamond cutting grinding piece comprises a diamond cutting grinding piece body arranged on a 65Mn steel substrate, and corrugated water channels are formed in the surface of the diamond cutting grinding piece body. The preparation method for the diamond cutting grinding piece comprises the steps of material mixture, substrate machining, compression forming, sintering and edge forming. The diamond cutting grinding piece produced through the preparation method for the diamond cutting grinding piece has the cutting effect and the grinding effect, and is safe and reliable in performance, simple and reasonable in structure, low in manufacturing cost, flexible in operation, good in sharpness of products and good in chip-removal performance.

The invention provides a plant oil-based offset lithographic printing ink formula and a preparation method thereof. The plant oil-based offset lithographic printing ink formula comprises, by weight, 30-35 parts of soybean oil, 19-29 parts of tung oil, 2-5 parts of soya alkyd resin, 30-35 parts of rosin-modified phenolic resin, 2-6 parts of a dry conditioning agent, 2-5 parts of a gelling agent, 18-28 parts of a pigment, 5-10 parts of a filler, 7-7.5 parts of other auxiliary agents and 2-5 parts of a drier. The preparation method comprises 1, binder preparation, 2, accessory material addition, 3, printing ink rolling and 4, re-rolling. The plant oil-based offset lithographic printing ink formula has the advantages of good rheological performances, fast curing performances, passing performances, good glossiness and good stability and is especially suitable for newspaper and periodical printing.

The invention discloses a method for manufacturing tungsten/cobalt carbide composite powder with a nanostructure. The method includes steps of firstly, dissolving, by mass, 55-92% of water-soluble tungsten salt, 3-40% of water-soluble cobalt salt, 3-6% of water-soluble carburizing and nodulizing agents and 0.1-2% of water-soluble composite grain growth inhibitors into water with the mass 3-5 times that of a mixture of the water-soluble tungsten salt, the water-soluble cobalt salt, the water-soluble carburizing and nodulizing agents and the water-soluble composite grain growth inhibitors to prepare mixed aqueous solution; secondly, quickly crystallizing the mixed aqueous solution obtained in the first step; thirdly, pre-treating crystalline, which is obtained in the second step, at the pretreatment temperature ranging from 500 DEG C to 700 DEG C to obtain nodular powder; and fourthly, performing reduction synthesis and carbon conditioning for powder materials, which are obtained in the third step, at the temperature ranging from 900 DEG C to 1000 DEG C to manufacture tungsten/cobalt carbide composite powder materials with nanostructures. The method has the advantages that a process is simple, and the hard alloy powder materials with the nanostructures can be produced in an industrialized manner.

The invention relates to an electric single-wheel scooter, which is characterized by mainly comprising a scooter body, a wheel hub motor, a gyroscope, a storage battery, a controller and a tire, wherein the tire covers on the wheel hub motor, the scooter body adopts a framework type integral structure and mainly comprises a gyroscope installing region, a wheel hub motor installing region and a storage battery installing region, the wheel hub motor installing region is positioned between the gyroscope installing region and the storage battery installing region and is in a middle position near the scooter body, the axial direction of the wheel hub motor is mutually vertical to the length direction of the scooter body, an electric quantity indicating lamp, a power supply switch and a charging interface are also arranged on the scooter body. The technical scheme is adopted, the performance is safer, the carrying is more convenient, and the size is smaller; during the actual riding, operators can more easily master the electric single-wheel scooter, in addition, the labor is saved during the operation, the long-time proceeding of a walking replacing scooter can be realized, and the electric single-wheel scooter becomes a very good amusement, exercising and walking replacing tool.

The invention belongs to the power transmission and transformation equipment field and relates to an energy-saving box type outdoor substation. The substation comprises a top cover and a box body; the box body is divided into a high-voltage chamber, a transformer chamber and a low-voltage chamber. The energy-saving box type outdoor substation further comprise an intelligent controller; the intelligent controller is connected with a low-voltage chamber power transmission line through a power source input cable; the high-voltage chamber is provided with a high-voltage entering cabinet, a high-voltage metering cabinet, a high-voltage ring main unit and a high-voltage outgoing cabinet; the low-voltage chamber is provided with a low-voltage entering cabinet, a high-voltage reactive power automatic compensation capacitor cabinet and a low-voltage outgoing cabinet; and a transformer arranged in the transformer chamber is an on-load automatic capacitance adjustment power distribution transformer. The energy-saving box type outdoor substation is safe, reliable, energy-saving and efficient. With the energy-saving box type outdoor substation adopted, a power factor as well as the power supply efficiency and voltage quality of a system can be improved, and line loss can be decreased, and distribution line cost can be decreased, and electric energy can be saved, and the occupancy of a power grid and the no-load reactive loss and active loss of the transformer can be decreased, and capacity increasing cost and operation cost can be saved, and saving energy and consumption reduction can be realized, and great economic benefits and social benefits can be brought about.

The invention relates to one power intelligent seamless three-phase balance system, which adopts test module, servo, switch module and switch to form power intelligent seamless system, wherein, the servo is connected to test module and switch module; the test module is to test three phase circuit each signal; servo is to test each phase signals for analysis, comparing and processing; the switch module is to receive process orders from servo to control its switch device; switch is fixed on each phase circuit switch.

The invention provides a remote network household appliance control system, which comprises a controller, a household appliance, a line concentration board, an expansion socket, and a display. The controller is provided with an embedded Linux operating system and a thttpd Webpage server inside. The household appliance is connected with the expansion socket, and the expansion socket and the display are both connected with the line concentration board which is connected with the controller, and the controller is connected with the host computer of a PC through the Internet. The control method includes the steps of authenticating passwords of login WebPages, activating corresponding CGI sub-programs to control all appliances, and exiting a control system, etc. The invention not only can realize the remote household control, but also have the advantages of convenient operation, stable performance, and safety factor.

The invention belongs to the technical field of radioactive substance treatment equipment and relates to a radioactive organic waste treatment device. A main body structure comprises a waste temporary storage tank, a catalytic degradation kettle, a solid waste collector, a separation tower, a thermal oxidation device, a tail gas processor, an air filter and a discharging pipe, the catalytic degradation kettle and the separation tower are in bidirectional fixed connection through a pipe, the waste temporary storage tank is fixedly connected with the catalytic degradation kettle through a pipe, the separation tower is fixedly connected with the thermal oxidation device through a pipe, the thermal oxidation device is fixedly connected with the tail gas processor through a pipe, the tail gas processor is fixedly connected with the air filter through a pipe, the air filter is fixedly connected with one end of the discharging pipe through a pipe, the other end of the discharging pipe is directly communicated with the atmospheric environment, the catalytic degradation kettle, the thermal oxidation device, the tail gas processor and the air filter are fixedly connected with the solid waste collector through pipes, and organic ingredients in radioactive organic waste are converted into inorganic ingredients according to the catalytic cracking principle. The radioactive organic waste treatment device is simple in structure, scientific and reliable in principle, reasonable in cost, safe in performance, capable of saving energy and protecting the environment and environmentally friendly in use.

The invention provides a method for preparing colored empty capsules by employing natural colorants, and belongs to the technical field of preparation of empty capsules. The natural colorants mainly comprise natural mineral colorants and plant extract colorants. Colored gelatin empty capsules, enteric gelatin empty capsules, hydroxypropyl methylcellulose empty capsules, enteric hydroxypropyl methylcellulose empty capsules, pullulan polyose empty capsules, enteric pullulan polyose empty capsules, sodium alginate empty capsules and modified starch empty capsules are prepared by the method, and oxidation resistance and light resistance of various empty capsules are raised and the color of the capsules is stabilized and not easy to fade. The empty capsules can tolerate changes in pH and have high stability. Residual of harmful substances is reduced and the products are more stable, safer and healthier.

The invention discloses a small individual aircraft with folding rotor wings. The small individual aircraft comprises rotor wings, rotor wing brackets and a main rod for supporting the rotor wings and the rotor wing brackets, and is provided with an oil motor, a lifter and a lifting rod, wherein the lifting rod is attached to and parallel to the main rod; the lifter is positioned at the bottom of the lifting rod; the top of the lifting rod is pressed against the oil motor; the oil motor is arranged on the main rod in a manner of not rotating; the oil motor is pressed under a lower supporting rod bracket; the output shaft of the oil motor drives the lower supporting rod bracket to move; a rack is arranged at the bottom of the lifting rod; the lifter is matched with the rack through an output gear, and drives the lifting rod to slide up and down relative to the main rod; and the oil motor, the lower rotor wing bracket, the lower supporting rod bracket and an upper supporting rod bracket can slide up and down relative to the main rod. The aircraft controls folding and unfolding of the rotor wings through the lifter, so that aims of saving a space and stabilizing the gravity center are fulfilled.

The invention relates to the technical field of a composite calcium-sulfonate-base grease and preparation thereof, particularly a composite calcium-sulfonate-base lubricating grease and a preparation method thereof. The preparation method of the composite calcium-sulfonate-base lubricating grease comprises the following step: 1. respectively weighing 20-30 parts by weight of high-base-number petroleum calcium sulfonate with the total base number of 200-400 mg KOH/g, and 44-55 parts by weight of high-viscosity-index base oil with the viscosity index of 90-120. The invention has the advantages of simple technique, accessible raw materials and safe working environment, is convenient for operation, and effectively lowers the energy consumption; the product obtained by the method provided by the invention has excellent properties, and can satisfy the product index requirements without adding any additive, and thus, the production input cost of the product is lower than that of any other high temperature grease; no harmful substance is generated in the product production and use process, so the composite calcium-sulfonate-base grease is harmless to the human body; and the composite calcium-sulfonate-base grease can be recycled and reutilized to maximize the use of energy sources, thereby completely satisfying the requirements of energy saving and environmental protection.

The invention discloses a rotary lifting maintenance platform, which belongs to the technical field of the bridge inspection vehicle. The rotary lifting maintenance platform comprises a maintenance platform, wherein the maintenance platform is hinged to a truss system or a portal frame; an oscillating driving device is connected between the maintenance platform and the truss system; and the oscillating driving device can control the maintenance platform to oscillate in a manner relative to a hinge point. The rotary lifting maintenance platform disclosed by the invention has the advantages of simpleness in operation, convenience in use, high maintenance efficiency and safe and reliable performance and is suitable to popularize and apply.

The invention discloses a deflashing device for a wheel blank, which comprises a machine frame, a servomotor, a synchronous belt, a chuck, a grinding wheel, a lead screw, a guide rail and the like, wherein a clamp is fixed on the chuck; the lower part of the chuck is fixed on the machine frame through a shaft and a bearing support; the chuck rotates under the action of a motor fixed at the left lower part of the machine frame and the synchronous belt; the grinding wheel is fixed at one end of a cross plate of a lifting bracket, and rotates under the driving of a motor fixed at the other end of the cross plate and the synchronous belt under the motor; the lifting bracket is connected with a translational bracket through the guide rail, and drives the lead screw to rotate through a motor, so that the lifting bracket fixed together with a lead screw nut moves up and down; the translational bracket is fixed on the machine frame through the guide rail; and a servo electric cylinder fixed on the right side of the machine frame drives the translational bracket to move horizontally. When any one of two photoelectric switches detects a signal of flashing, the chuck stops rotating, and the grinding wheel cuts the flashing.

The invention relates to a rock wool composite board and a continuous production method thereof, and belongs to the technical field of building materials. The rock wool composite board comprises an upper coiled material layer and a lower coiled material layer with reinforcing and fireproof functions, wherein a rock wool plate with a heat preservation function is arranged between the upper coiled material layer and the lower coiled material layer; the upper coiled material layer and the rock wool plate as well as the lower coiled material layer and the rock wool plate are integrally compounded through an adhesive. According to the rock wool composite board produced by adopting the continuous production method provided by the invention, on premise that the heat preservation property and the flame retardancy of the rock wool are not changed, the overall strength of the rock wool plate is improved due to introduction of adhesive layers and interface layers; as the adhesive layers and the flexible waterproof coiled material self are good in water resistance, all needed is to perform waterproof treatment on the periphery of the produced rock wool composite board, moreover, the flexible coiled material is taken as the interface layers, the cost is greatly reduced; as the flexible coiled material is good in affinity with a cement base and the interface of the flexible coiled material does not need to be treated after being mounted on a wall, a construction process can be simplified.

The invention provides a flexible coupling, comprising a cylinder body and flanges which are arranged at two ends of the cylinder body. The invention is characterized in that the cylinder body is an FRP cylinder body; the flanges are fixedly connected with or integrated into a whole with a taper sleeve or a cylinder sleeve; the two ends of the FRP cylinder body are sheathed with, fixedly bonded to or fixedly connected with the taper sleeve or the cylinder sleeve respectively. The invention is especially suitable for the connection of a speed increasing box in wind power generation equipment and a wind power generation set, plays a good damping and impact and vibration absorption role, has the capability of providing the displacement compensation, effectively improves the motion quality and stability of transmission machines, reduces the noise and improves the safety performance of the equipment.

The invention relates to a sieving and crushing device, and particularly relates to a novel sieving and crushing device for rare earth carbonate. The technical problem to be solved by the invention is to provide a novel sieving and crushing device for rare earth carbonate. In order to solve the technical problem, the invention provides a novel sieving and crushing device for rare earth carbonate. The novel sieving and crushing device for the rare earth carbonate comprises a cylinder body, a charge device, a left-right swing device, a hopper, a fixed plate, a connection rod and the like, wherein the left-right swing device is arranged below the cylinder body; the hopper is formed above the charge device; the fixed plate is arranged below the charge device; the left end of the fixed plate is connected with the upper end of the right sidewall of the connection rod in a welding manner; and the lower end of the connection rod is connected with the top of a base I in a welding manner. The novel sieving and crushing device for the rare earth carbonate adopts a simple split structure, is easy to repair and maintain, greatly increases the sieving and crushing efficiency of the rare earth carbonate through the combination of the charge device and the left-right swing device, and is good in sieving and crushing effect, capable of saving enterprise resources, convenient to operate, and easy to produce and manufacture.

The invention discloses a sterilizing-and-disinfecting-type coupling agent and a preparing method thereof. The sterilizing-and-disinfecting-type coupling agent is prepared from, by mass, carbomer 940, propylene glycol, glycerine, vitamins B5, polyvinylpyrrolidone K30, triclosan, methyl parahydroxybenzoats, triethanolamine, lauryl sodium sulfate and purified water. Compared with the prior art, the sterilizing-and-disinfecting-type coupling agent is good in stickiness and skin compatibility, and has good infiltrating performance for the skin and an ultrasonic probe, and the problems that an existing coupling agent is poor in stickiness and excessively short in drying time can be solved; due to the synergistic effect of the triclosan and the methyl parahydroxybenzoats in the formula, the coupling agent achieves safe and stable sterilization and bacteriostasis; the cytotoxicity of the coupling agent is greatly reduced, and use safety is high; the skin irritation of the coupling agent is low, and repairing of injured skin can be promoted at the same time through components with the repairing function in the formula. The preparing method of the coupling agent is simple, and industrial production can be easily achieved.

The invention discloses a mask capable of preventing (particulate matter) PM 2.5, mainly aiming at solving the problem that the existing protective mask has no functions of preventing PM 2.5 dust particles and sterilizing and disinfecting. The mask capable of preventing PM 2.5 is composed of outer layer material, filter layer material and inner layer material. The mask has an extremely high filtering efficiency on microns, submicron, nanometer suspended particles and neutral micro particles, and can fully filter off and stop PM 2.5 suspended particles in the air from coming into human body, kill bacteria attached on dust and propagated with the air, and protect human body from being injured by air pollution.

The invention discloses a wet multi-disc parking brake which comprises a brake cover, a brake shell, a piston, a friction pair, a spring, a spline shaft, a sealing element and a retainer ring. The piston is mounted in a piston cylinder encircled by the brake cover and the brake shell, the piston cylinder comprises a first cylinder hole with a large diameter and a second cylinder hole with a small diameter, the piston is provided with a first sliding surface with a large diameter and a second sliding surface with a small diameter, the first sliding surface is in slide fit with the wall of the first cylinder hole, the second sliding surface is in slide fit with the wall of the second cylinder hole, the spring on the brake cover is butted to the back of the piston, the friction pair comprises friction discs and dual discs, is arranged on the outer periphery of the spline shaft and is positioned on a side of the front surface of the piston, the friction discs and the dual discs are axially alternately arranged, the brake shell is meshed with the friction discs via internal spline, the dual discs are meshed with the spline shaft via internal splines, and a high-pressure oil circuit and a lubricating oil circuit are arranged in a tank. The wet multi-disc parking brake has the advantages that the wet multi-disc parking brake is small in radial size, and dry friction among the friction discs and the dual discs can be prevented.

The invention relates to a rust preventing device for machinery, in particular to an oil-spraying rust preventing device for a mechanical component. The invention solves the technical problems by providing the oil-spraying rust preventing device for the mechanical component, which ensures low labor intensity, has high rust preventing efficiency, saves time and labor and saves resources. In order to solve the technical problems, the invention provides such the oil-spraying rust preventing device for the mechanical component. The oil-spraying rust preventing device for the mechanical component comprises a base, a first small bracket, a first rotating shaft, a rotating wheel, a first chain wheel, a cam, a second chain wheel, a second rotating shaft, a chain plate and the like, wherein the first small bracket is connected to the top of the base; the first small bracket is arranged in front-and-back symmetry; the first rotating shaft is rotationally connected with the upper end of the firstsmall bracket. The oil-spraying rust preventing device for the mechanical component, provided by the invention, ensures low labor intensity, has high rust preventing efficiency, saves the time and the labor, saves the resources, facilitates reduction in expenses of an enterprise, facilitates the production and the development of the enterprise, and has safe and reliable performance and a simple structure.

The invention relates to a drain pipe anti-freezing system. The drain pipe anti-freezing system is formed by a drain pipe water inlet connecting opening, an elastic converged flow guide opening, a controller, electric heaters, a water sensor and an atmospheric temperature sensor; the drain pipe water inlet connecting opening is of an inverted trapezoidal structure; the bottom of the drain pipe water inlet connecting opening is inserted into a drain pipe; the water flowing down is guided to the position of a central axis of the drain pipe through the elastic converged flow guide opening to enable the water flowing down to rapidly fall down to a drain pipe outlet in a free falling body mode, wherein the drain pipe outlet is vertically formed; when the water flowing down is more, the elastic converged flow guide opening can be correspondingly expanded under the action of the water to allow more water to pass through smoothly; the inner wall of the drain pipe water inlet connecting opening is provided with the water sensor and the electric heaters; a signal receiving end of the controller is connected with the water sensor and the atmospheric temperature sensor; an output end of the controller is connected with the electric heaters. According to the drain pipe anti-freezing system, the freezing problem in the drain pipe is solved, the effective protection on the building is achieved, the performance is safe and reliable, and the drain pipe anti-freezing system is particularly suitable for northern area.

The invention relates to an accurate positioning, welding and conveying device which comprises a power transmission mechanism, a positioning pin mechanism and a rail mechanism in connection. The power transmission mechanism comprises a rail connecting seat, a travelling gear, a driving motor, a body mounting seat, a guide wheel mounting plate and a track roller, the positioning pin mechanism comprises a linear bearing mounting seat, a linear bearing, a cylinder mounting seat, a positioning pin, a positioning pin connecting plate, a cylinder, an internal circlip, a cylinder head pressing block, a cylinder head and a positioning and mounting frame, and the rail mechanism comprises a support mounting frame, a linear guide rail, a linear guide rail shield, a rack, a shield mounting plate and a rack positioning block. The conveying device is fast and stable in running, high in positioning accuracy, small in occupied space, simple in structure, reasonable in design and widely applicable to a multi-vehicle flexible welding line of automobile automation, type exchange time can be effectively saved, positioning accuracy of a fixture is improved, product qualification rate is effectively increased, and production efficiency is greatly improved.

The invention provides a soil body electrical parameter space-time distribution testing device and testing method for a triaxial experiment. The testing device comprises a triaxial compression experiment device, an insulating rubber film, conducting strips and an electrodes. The insulating rubber film, the conducting strips and the electrodes are added into a confining pressure chamber in the triaxial compression experiment device; the insulating rubber film is used as a soil sample to be isolated from the confining pressure chamber in the triaxial compression experiment device; the conductingstrips and the electrodes are used for testing electrical parameters of the soil body; the conducting strips are arranged at the end parts of the two ends of a soil sample of the triaxial compressionexperiment; the electrodes are inserted into the soil body through the small holes of the insulating rubber film and are uniformly arranged along the circumferential direction of the insulating rubber film to form a group of conductive electrodes; and a plurality of groups of electrodes are arranged along the axial direction of the insulating rubber film to test the resistivity of each layer of soil body. The soil body electrical parameter space-time distribution testing device and testing method are applied to subgrade engineering of different soil bodies, soft soil and silt foundation engineering, various soil body landslides and other engineering, the soil body performance and damage state are evaluated, and the relation between damage and strength is established.

The invention discloses a portable electric heating towel rack having a quick charge function. The portable electric heating towel rack having the quick charge function comprises a touch induction switch, an LED display screen, a quick charge device, a temperature sensor, an electric heating driving unit, a controller, a lighting device, an electric heating towel rack body and an electric heating device arranged in the electric heating towel rack body. The touch induction switch, the LED display screen, the quick charge device, the temperature sensor, the electric heating driving unit and the lighting device are all electrically connected with the controller. The electric heating driving unit is electrically connected with the electric heating device arranged in the electric heating towel rack body. The portable electric heating towel rack having the quick charge function overcomes the shortcomings in the prior art, can be placed on a bedside table or on the ground, can be connected with an external power source for heating, can be used for drying a towel and a baby diaper in a power failure environment after being charged, can be used for warming hands, and is quite convenient to carry.

The invention relates to a screening and crushing device, in particular to a high-speed screening and crushing device for rare earth carbonate. The high-speed screening and crushing device for the rare earth carbonate comprises a barrel body, a material-screening device, a material-charging device, landing legs, a discharging pipe and the like. The material-screening device is arranged above the barrel body, the material-charging device is arranged above the material-screening device, and the landing legs are arranged below the barrel body in a left-right symmetrical mode; and the upper ends of the landing legs are connected with the lower inclined wall of the barrel body in a welded mode, and the discharging pipe is arranged under the barrel body. According to the high-speed screening and crushing device for the rare earth carbonate, through the combination of the material-charging device and the material-screening device, the rare earth carbonate can be screened and crushed at a high speed, and the working efficiency is high.