133results about How to "Increase the speed of descent" patented technology

The invention relates to a base matrix, a encoder / decoder of Low Density Parity Check (LDPC) codes and a generation method thereof. The encoder / decoder is determined uniquely by the parity check matrix of the LDPC codes. With different code sizes, said parity check matrix can be obtained by expanding different base matrixes, and also can be obtained by expanding a unique base matrix after correction. Elements of said base matrix must meet an inequation in which the girth value is up to the standard, e.g. when girth ≧6, for any element i, j, k, l in the matrix which forms the short loop having a length of 4 in anticlockwise, there are always mod(i−j+k−l, z) unequal to 0. By this invention, the girth of the constructed base matrix is made as large as possible, the amount of the shortest loops is as few as possible when it is the same girth, thus the curve of bit error ratio (BER) is dropped quickly, the error floor of the LDPC codes is eliminated effectively, and the optimal performance of the LDPC codes is obtained.

The embodiment of the invention provides a luminance compensation method and a self-illumination display device, and relates to the technical field of display devices. According to the luminance compensation method and the self-illumination display device, attenuation difference of self-illumination elements in all areas after the self-illumination display device works for a long time can be reduced, and the lumpy mura phenomenon occurring after a displayer of the self-illumination display device works for a ling time can be avoided. The luminance compensation method comprises the steps of obtaining a pre-stored compensation factor table of the self-illumination display device, wherein the compensation factor table comprises compensation factors of N areas, the compensation factor of the area with the temperature higher than the temperature of a standard area is smaller than G, and the compensation factor of the area with the temperature lower than the temperature of the standard area is larger than G; compensating for the luminance of images displayed in all the N areas according to the compensation factor table. The luminance compensation method is used for compensating for the luminance of the self-illumination display device.

In a shift register circuit, a defective operation while an output signal is not outputted and a drive capability lowering while the output signal is outputted are prevented. A unit shift register comprises a first transistor for supplying a clock signal inputted to a first clock terminal to an output terminal, and the first transistor is driven by a drive circuit. A second transistor is connected between the gate of the first transistor and the output terminal and has a gate connected to the first clock terminal. The second transistor connects the gate of the first transistor to the output terminal based on the clock signal when the gate of the first transistor is at L (Low) level.

A capacity varying type rotary compressor comprises a casing (100) that maintains a discharge pressure state; a motor (200) installed in the casing (100) and generating a driving force; one or more cylinder assembly (300,400) fixed in the casing (100) and compressing a refirgerant by a rolling piston (340,430) and a vane (350,440), the rolling piston (340,430) eccentrically coupled to a rotation shaft (230) of the motor (200) and performing a linear motion; and a vane restricting unit (500) for restricting the vane (440) separated from the rolling piston (430) or releasing the vane (440) thereby contacting to the rolling piston (430) according to a difference of pressures applied to the vane (440). In the rotary compressor, an entire structure is simplified thereby to minimize precessing assemblies, resulting in reducing aproduction cost and enhancing a productivity. Furthermore, as the vane (440) is restricted by using a pressure difference of the system, a relibility is enhanced. Especially, in case of using a stopper (550), the reliability of the product can be more enhanced.

The invention provides an advertising board, and relates to the field of advertisement equipment. The advertising board comprises a supporting column, a support, a rotary base and an advertisement box, the support is arranged on the upper portion of the supporting column in a sleeved mode and is fixed with the supporting column, at least one concave port is formed in the support, the rotary base is arranged on the supporting column in a sleeved mode and is arranged above the support, a protrusion matched with the concave port is arranged on the rotary base, and the rotary base is fixedly connected into the advertisement box. The advertising board has the advantages that due to the fact that the protrusion of the rotary base is matched with the concave port of the support, the advertising board rotates when wind blows, and can automatically recover to perform the display effect when no wind blows or wind is small. The advertising board has the display function, cannot be blown down easily when wind power is large and resets when no wind exists or the wind is small, cost is saved, and the service life of the advertising board is prolonged.

The invention discloses a lithium ion battery silicon cathode material and a preparation method thereof. The cathode material comprises nanometer silicon powder and a coating layer coated on the surface of the nanometer silicon powder. Grain diameter of the nanometer silicon powder ranges from 0.1 nanometer to 10 micrometers and the coating layer is a layer of silicon dioxide with thickness ranging from 1 nanometer to 1 micrometer. The preparation method for the lithium ion battery silicon cathode material includes: (1) fully dispersing the nanometer silicon powder in sodium silicate solution; (2) adding graphite conducting material and mineral acid into the mixed solution obtained in the step (1) for fully stirring and precipitating; (3) applying the precipitate obtained in the step (2) after being washed on a copper foil surface, and drying the copper foil surface applied with the precipitate at the temperature of 150 DEG C. Active silica in the lithium ion battery silicon cathode material is enabled to exert a larger capacity, and the lithium ion battery silicon cathode material is good in cycle performance simultaneously.

The invention relates to a hierarchical pore structure silicon-based negative electrode material for a lithium battery and a preparation method of the hierarchical pore structure silicon-based negative electrode material. The preparation method comprises the following steps: using a waste ultrafine silicon dioxide powder material generated in optical fiber production, firstly performing acid pickling and purification on the silicon dioxide powder, then using a water bath method to disperse the purified silicon dioxide powder into deionized water, adding a silane coupling agent, then adding an acid to the solution, further adding a surfactant, stirring, standing, crystallizing, filtering, drying and calcining the crystal at high temperature to form a modified carrier; adding the modified carrier material to an ethanol solution or deionized water, adding silica powder, stirring and dispersing, filtering and drying to obtain the silicon-based material with a mesoporous structure; then adding the purified silicon dioxide powder to a sodium hydroxide solution, performing high temperature autoclave reaction, adding the silicon-base material with the mesoporous structure and a carbon material to the obtained product, then adding an acid solution, washing, drying and calcining at high temperature, and naturally cooling to obtain the silicon-based negative electrode material with the hierarchical pore structure.

The invention claims an internal shrinking tensile rope parachute. The basic idea of the invention is as follows: using an internal shrinking tensile rope, which can be shortened after being aerated and can produce tensile force and can be prolonged after being stretched and can compress air, to replace the rope tape of the existing parachute system, or adding an internal shrinking tensile rope on the parachute system, and adding a set of air supply system and a sensing control system. Said replaced rope tapes comprise a parachute lanyard (1), a connection rope (2), a binding rope (3), a close rope (4) and so on. When the parachute system with said structure is used, the contraction and stretching of the rope tape is controlled to control the size of the tensile force produced by the rope tape so as to change the shape, position relationship and aerodynamic characteristic of the parachute system to further reduce overload produced on the parachute system, and change the motion speed and direction of the parachute system and reduce landing speed of air-dropped articles. The parachute system with said structure is added with new functions and can probably reduce weight of the parachute system.

The invention relates to the technical field of bolt chamfering machines, in particular to a fully automatic bolt chamfering machine. The fully automatic bolt chamfering machine comprises a loading mechanism, a material holding mechanism, a machine working table of a tool rest mechanism, an unloading mechanism and an electrical control system, and is characterized in that: a feeding outlet end of a sliding rail of the loading mechanism is connected with an inlet of a chuck of the material holding mechanism; the material holding mechanism is arranged on the machine working table; the machine working table in front of the chuck of the material holding mechanism is provided with the tool rest mechanism; and an electrical cabinet of the electrical control system is arranged inside the machine working table. The fully automatic bolt chamfering machine has the advantages that: the fully automatic bolt chamfering machine does not need manual processing of labors; from the bolt feeding to chamfering processing, the fully automatic bolt chamfering machine adopts automation completely and is controlled by PLC completely; the fully automatic bolt chamfering machine has quite high work efficiency and saves time and labor; moreover, the processed product has high precision.

A control system for hybrid construction machine includes: an operation valve for operating a boom; a variable displacement type fluid pressure motor; a distribution mechanism adapted to adjust a flow to be distributed to the fluid pressure motor; a motor generator adapted to be rotated integrally with the fluid pressure motor; a variable displacement type assist pump adapted to be rotated integrally with the motor generator; a distribution mechanism control unit adapted to control the distribution mechanism; a tilt angle control unit adapted to control tilt angles of the fluid pressure motor and the assist pump; and a motor generator control unit adapted to maintain a rotation speed of the motor generator at a target rotation speed. The target rotation speed at the time of boom regeneration control is set to higher than the target rotation speed in a case where only an assist control is carried out.

The invention particularly relates to a deep-well rescue robot applicable to narrow spaces and with strong passing capability, in-time rescue and convenience in carry and a rescue method. The deep-well rescue robot comprises an elliptical spherical-shell-shaped path finding body and a plurality of spherical-shell-shaped rescue bodies, wherein four-rotor or six-rotor type flying mechanisms are arranged at the corresponding positions of respective upper end surfaces of the path finding body and the rescue bodies; and the outer side surface of the path finding body is provided with two rows of supporting leg groups horizontally arranged in a ring shape along the vertical direction, and each row of supporting leg group comprises a plurality of automatically-telescopic folding type supporting legs. The rescue robot can realize flying movement or creeping movement under a well by means of the flying mechanisms or the supporting legs, is compact in volume and can meet underwater rescue; and the path finding bodies can realize elusion when descending and encountering obstacles, is strong in passing capability and is suitable for rescuing in the narrow spaces. When descending, the path finding body can draw a first-type deep-well map and a second-type deep-well map so as to be beneficial to increasing the descending speed and the ascending speed of the rescue bodies and the path finding body.

A plunger device for a hydrocarbon wellbore is provided that has replaceable modular components that allow the function of the plunger device to be altered. Concentric sleeves and short sleeves may be selectively disposed about a chassis of the plunger device. One or more short sleeves may be removed to expose an entrance aperture which allows fluid flow to enter an interior volume of the chassis and pass through an exit aperture in the chassis. This configuration allows the plunger to descend down a bore hole more rapidly. However, a well operator may determine that it is advantageous to keep the short sleeve on the chassis to block the entrance aperture. Thus, the weight of the plunger overcomes the pressure in the borehole, and the plunger descends more slowly down the borehole.

The invention relates to a multi-functional earthquake emergency response escape slide for a public building. The multi-functional earthquake emergency response escape slide comprises a slide body and a slide column, the slide body is arranged along the slide column, a plurality of support pieces extend from the slide column, and the slide body is connected with the slide column through the support pieces. The multi-functional earthquake emergency response escape slide for the public building uses the spiral slide as the body, the structure is simple, the design is smart, the space is saved, and the entertainment and guidance are strong when there is no disaster. By means of an isolating support and flexible connection, the escape slide is separated from the body structure, the shaking in an earthquake can be effectively reduced, the capacity input is reduced, the earthquake resistance performance is excellent, a cylinder-shaped slide-way accelerates the gliding speed of a survivor and improves the safety, the bottom layer is provided with a cushion and a protection shell, and the safety of the survivor is effectively protected. LED emergency lamps and vent holes good for escaping are arranged in the slide-way. When there is no disaster, the multi-functional earthquake emergency response escape slide can serve as an entertainment slide or an emergency response escape propagandizing facility for the government; the multi-functional earthquake emergency response escape slide is capable of being used for the earthquake, fire hazard and non-disaster conditions and suitable for the large public building and other densely populated places.

The invention aims at providing a synchronous double-valve electromagnetic control oil atomizer. The synchronous double-valve electromagnetic control oil atomizer comprises a synchronous double-valve electromagnet assembly, a pilot ball valve base, a steel ball, a control piston body, an oil atomizer body, a needle valve ejector rod, a needle valve reset spring base, a needle valve reset spring, a nozzle, a nozzle fastening nut, a needle valve and an oil atomizer head fastening nut. The synchronous double-valve electromagnet assembly structure is adopted, two pilot ball valves can be rapidly and synchronously controlled, the requirement for ball valve control flow and response can be met, the effect of the rail pressure change on the movement of the ball valves can be reduced, and the rapid response characteristic of the diesel engine total-working-condition oil atomizer is guaranteed. In addition, the structure of an axial cooling type iron core and a radial coil is adopted in the synchronous double-valve electromagnet assembly, the heat dissipation area of the coil and the iron core is increased, the interior of the iron core and the coil are well cooled, and good electric conduction performance, safety and reliability of the coil and good magnetic conduction performance of iron core materials are guaranteed.

The invention discloses a washing machine. The washing machine comprises a machine body, a door cover assembly and a damper, wherein the door cover assembly is arranged on the machine body and can rotate between a machine body opening position and a machine body closing position; the damper is arranged between the machine body and the door cover assembly, by means of the damper, the speeds of the door cover assembly comprises a first speed and a second speed when the door cover assembly rotates from the opening position to the closing position, and the first speed is higher than the second speed. According to the washing machine, the damper is arranged between the machine body and the door cover assembly, so that the door cover assembly can have a higher descending speed in front-section travel during descending, and accordingly, the descending time of the door cover assembly can be shortened.

The goal of the invention is to provide an axial cooling radial coil type parallel magnetic circuit electromagnet. The electromagnet comprises an axial cooling type iron core, a radial type coil, an armature reset spring, armatures, a valve rod, a valve pocket, a stop ring, a rubber buffer washer, an upper shell, a lower shell and a residual air gap adjusting ring. The axial cooling radial coil type parallel magnetic circuit electromagnet of the invention could effectively cool the inner side of the iron core and the coil, reduce surface hydraulic pressure of the armature, damping force acted on the armature, inductance of the coil by performing distributed arrangement to a traditional single multi-turn coil, improve rising velocity and decay rate of the current in the coil, and quicken the response speed of the electromagnet. In addition, by using the principle of a parallel magnetic circuit, the axial cooling radial coil type parallel magnetic circuit electromagnet of the invention shares the axial cooling type iron core and the radial type coil to synchronously control the two armatures and act on same control chamber so as to increase flow of a control valve while ensuring the response speed so that the pressure in the control chamber could be discharged fast and the fuel cut of a fuel injector is straightforward. The axial cooling radial coil type parallel magnetic circuit electromagnet of the invention is conductive to improving control precision of oil injection and economical efficiency of a diesel engine, thereby reducing emission.

The invention discloses a crushing device for laminated glass production. The crushing device comprises a supporting platform, the supporting platform is provided with a fixing frame, I-shaped frames and a material receiving slot correspondingly, the fixing frame is provided with a feeding table, and the included angle between the feeding table and the fixing frame is smaller than 90 degrees; a crushing barrel and a material guiding inclined table are arranged between the I-shaped frames correspondingly, the crushing barrel is provided with a feeding hopper, and the feeding hopper is connected with the feeding table; the inner wall of the crushing barrel is uniformly distributed with crushing teeth, the crushing barrel is internally provided with a first stirring roll and a second stirring roll correspondingly, the two ends of the first stirring roll are both provided with driving gears, the two ends of the second stirring roll are both provided with driven gears, and the driven gears are connected with the driving gears; and one side of the supporting platform is provided with a drive motor, and a driving belt is arranged between the drive motor and the first stirring roll. The crushing device is simple in structure, automatic and efficient, good in crushing effect and capable of crushing waste glass into slag and collecting the slag in a unified manner, secondary machining and utilization are performed conveniently, and the utilization rate of the waste glass is increased.

The invention discloses an attrition mill grinding bin capable of automatic feeding. The grinding bin comprises a grinding bin body, a decompression chamber, an air outlet pipe and air inlet pipes, wherein a plurality of air inlets are formed on one side of a connecting part between each air inlet pipe and the grinding bin body; the grinding bin body comprises a feed pipe, a stock bin, discharge pipes and U-shaped circular grooves; a feed port of the feed pipe stretches out of the side surface of the grinding bin body; a discharge port of the feed pipe is connected with a material inlet of the stock bin; the stock bin is fixedly mounted on a rotating shaft; at least one stock bin discharge port is formed in the side surface of the stock bin and fixedly connected with the discharge pipes; discharge ports of the discharge pipes are connected with the U-shaped circular grooves; the stock bin is in a cylinder structure with both the bottom surface and the top surface being in regular polygon shapes; one storage bin discharge port is formed in each rectangular side surface of the stock bin; and the stock bin is internally provided with a cone taking the bottom surface of the stock bin as the bottom surface. The grinding bin is provided with the cone taking the bottom surface of the stock bin as the bottom surface, so that the situation that material accumulation of the stock bin occurs due to the fact that a material does not slide down timely can be avoided, and the material can enter the U-shaped circular grooves fully.

The invention discloses a roller cutting grinding mill automatic feeding device capable of enabling materials to be free of remaining. A transmission device comprises a belt (3), belt wheels (2) and feeding clamping grooves (1) fixedly connected with the belt (3); the feeding device comprises a first stock bin (4) connected with the feeding clamping grooves (1) and a feeding pipe (5) fixedly connected with a discharging opening of the first stock bin (4); a discharging opening of the feeding pipe (5) is fixedly connected with a feeding opening of a second stock bin (6), and a plurality of second stock bin discharging openings (61) are formed in the side face of the second stock bin (6) and are fixedly connected with corresponding discharging pipes (8) respectively; and discharging openings of the discharging pipes (8) are connected with U-shaped annular grooves (9) respectively. According to the device, materials can be automatically fed into the feeding device, and it also can be ensured that the phenomenon that the materials are stacked in the stock bins, and the materials cannot smoothly slide is avoided; a machine tool can effectively run, and feeding efficiency and stability are ensured; and workloads of an operator are reduced, and the production efficiency is improved.

The invention discloses an MOSFET / IGBT high-speed driving circuit based on linear optical coupling isolation. The high-speed driving circuit utilizes a variable resistance structural circuit on a collector or an emitter of a linear optical coupler and adopts a dynamic voltage comparing circuit on an output loop of the optical coupler, so that the transmission speed of a driving signal and the gradient of a rising and falling edge are improved, and thus the performance of the driving circuit is improved. The high-speed driving circuit has the advantages of fast high-speed driving speed, small volume and the like.

The invention provides a hybrid cooling system for a ground transformer of a substation. The hybrid cooling system comprises a transformer, a base and a frame platform, wherein the base is used for supporting the transformer, the frame platform is arranged on ground around the transformer, a circle of pressure pipeline is arranged around the transformer and on the frame platform, the pressure pipeline communicates with a water supply mechanism, a travelling mechanism is arranged on the frame platform and is corresponding to the pressure pipeline, an atomization spraying mechanism is arranged on the travelling mechanism, a plurality of L-shaped connection pipelines are vertically arranged on the pressure pipeline, the atomization spraying mechanism is matched with the connection pipelines,a temperature monitoring mechanism is arranged on the pressure pipeline and is corresponding to the transformer, an equipment groove is formed in a part below the frame platform, an acceleration heatabsorption mechanism is arranged in the equipment groove, and a spraying monitoring mechanism is arranged between the transformer and the pressure pipeline and is corresponding to the connection pipelines. By the hybrid cooling system, the transformer temperature can be automatically detected, spraying atomization cooling is performed on a high-temperature region, heat absorption and evaporation of water mist are accelerated by wind, the cooling speed of the transformer is greatly increased, and the safety during running of the transformer of the substation is improved.

The invention belongs to the technical field of rare earth concentrates, and particularly relates to a rare earth concentrate treatment method. The method comprises the following steps: roasting: sodium carbonate and the rare earth concentrates are mixed, the mixture is put into a rotary kiln for roasting to form a roasted product, and the ratio of the rare earth concentrates to sodium carbonate is 1:(0.2-1):0.3. With adoption of a screening and grinding mode, materials with the particle size meeting the requirement are not ground any more, the grinding time is saved, meanwhile, the materialsare intermittently unloaded from the bottom of a material box, the materials which are unloaded once can be ground under swinging of grinding rollers once or multiple times, and blockage of the innerwall of a grinding groove body and the material leakage slits in a grinding plate is prevented; and besides, a small quantity of the materials are unloaded and slowly moved downwards through a distributing plate, a decelerating function for the materials can be achieved, compared with a traditional mode that the materials are added at a time to cause dust flying, the design enables the material flying amount to be smaller, dust pollution can be reduced, and material waste can be avoided.

The invention provides a novel space marine evacuation channel and an evacuation method thereof. The evacuation channel comprises a plurality of round supporting steel rings, supporting steel ropes, adamping cloth sliding way and an air expansion type life raft, wherein the plurality of supporting steel ropes are uniformly arranged along the circumferential direction of the plurality of round supporting steel rings which are arranged from top to bottom and penetrate through all the round supporting steel rings from top to bottom; a first class unit is enclosed by the first round supporting steel ring and the second round supporting steel ring at an inlet end; a third class unit is enclosed by the first round supporting steel ring and the a second round supporting steel ring at an outlet end; a plurality of second class units are enclosed by the second round supporting steel ring at the inlet end, the first round supporting steel ring at the outlet end and all the round supporting steel rings. The novel space marine evacuation channel provided by the invention adopts a net braiding structure and wind resistance is reduced; evacuation people can conveniently descend and the fallingspeed can be automatically controlled; a space position of the whole channel in the round supporting steel rings is adjusted by adopting an adjusting rope, so that the falling route and position are adjusted and the gliding speed is slowed down.

The invention provides the air-cooled crystallization prilling device for full-melting compound fertilizers, which comprises a prilling tower (1) and a rotary prilling head (2), wherein, the height of the prilling tower (1) is 15m to 70m, and the diameter thereof is 6m to 18m; the rotary prilling head (2) is mounted in the center of the top part on the inner side of the prilling tower (1); a cone-shaped collector (4) is connected to the lower part of the prilling tower (1); the invention is characterized in that a circle of exhaust fans (3) are at least mounted at the top of the prilling tower (1); the air inlets of the exhaust fans (3) are communicated with the inner cavity of the prilling tower (1); the distance L between the edge of the outermost exhaust fan (3) and the inner wall of the prilling tower (1) is 0.9m to 2.5m; a circle of air-inlet windows (5) with the height H thereof being 1.2m to 3m are formed at the bottom of the prilling tower (1) and the upper part of the cone-shaped collector (4); a conveying device (6) is mounted below the discharge hole of the cone-shaped collector (4); and a drum cooler (7) is mounted at the discharging end of the conveying device (6). The invention has the advantages of good prilling effect and convenient manufacture and installation.

The present invention discloses a synchronizing signal detection method based on a second-order low-pass wave trap. The advantages of the present invention are that: 1 the noise attenuation speed is increased based on a second-order filter and the wave trap, thereby greatly improving a system cut-off frequency, reducing a detection phase shift and improving a system dynamic response speed; 2 a reference frequency and a filter parameter are adjusted dynamically by SOGI-PLL, thereby satisfying the detection requirement for the power grid frequency large-range change. Compared with a conventional single-phase synchronizing signal detection technology, the structure and the parameter design of the new method are simplified substantially, and the theory and experiment show that the synchronizing signal detection method of the present invention has the satisfied detection accuracy and dynamic response on various power grid working conditions.

The invention provides a cement telegraph pole branching frame, and belongs to the technical field of telegraph poles. The telegraph pole branching frame solves the problem that the service life of the telegraph pole branching frame is shortened when external force applied to cables is increased. The cement telegraph pole branching frame comprises a telegraph pole body with openings in the upper end and the lower end, a cover plate mechanism is arranged at the opening in the upper end of the telegraph pole body, supporting mechanisms triggering the cover plate mechanism to work are arranged atthe left end and the right end of the cover plate mechanism, and the two supporting mechanisms are distributed in a bilateral symmetry mode relative to the center line of the telegraph pole body. Andtwo guide mechanisms are arranged on each supporting mechanism. The cement telegraph pole branching frame is safer to use and longer in service life.

The invention discloses a material grinding bin suitable for a roller cutting attritor. The material grinding bin comprises a bin body, a pressure reducing chamber and a wind pipe, wherein a discharge port of a feed pipe in the bin body is connected with a feed port of a bin; the bin is fixed on a rotating shaft; at least one bin discharge port is formed in the side surface of the bin, and is fixedly connected with a discharge pipe; a discharge port of the discharge pipe is connected with a U-shaped annular groove; the bin adopts a cylindrical structure with regularly polygonal top and bottom; all side surfaces of the bin are rectangular; the bin discharge ports are respectively positioned on all the rectangular side surfaces of the bin; a cone with the bottom surface of the bin as the bottom surface is arranged in the bin, and is lower than the bin; and preferentially, the peak of the cone is positioned in the body center of the bin. One cone is arranged in the bin for accelerating the material gliding speed to prevent the material accumulation caused by the material gliding not in time; and after the blanking is stopped, materials in the bin can totally enter the U-shaped annular groove without needing manual cleaning.

The invention discloses a full-automatic roller cutting and grinding machine. The conveying and feeding device includes a chain, a feeding slot and a sprocket; Material pipe, silo, discharge pipe, U-shaped ring groove and grinding wheel, the discharge port of the feed pipe is connected to the silo, and the discharge port of the silo on the side of the silo is fixedly connected with the corresponding discharge pipe respectively. The pipe is connected to the U-shaped ring groove, and there are multiple grinding wheels in the U-shaped ring groove, and the grinding wheels are fixedly connected to the rotating shaft through the rotating arm; the outlet of the silo is evenly distributed on the side of the silo, The lower opening of the mouth is at the same height as the bottom surface of the silo; a vertebral body with the bottom surface of the silo as the bottom surface is arranged in the silo, and the height of the vertebral body is lower than the height of the silo. The invention realizes automatic feeding through chain transmission, and the materials can slide down by themselves without manual feeding, and after stopping feeding, all the materials in the hopper can enter the U-shaped ring groove without manual cleaning.