58results about How to "Convenient to block" patented technology

The invention discloses an energy-saving path planning and obstacle avoiding method for a drone, comprising the following steps: 1) detecting obstacles in the forward direction in real time; 2) establishing an obstacle area in where the obstacle is located if there is an obstacle; 3) using the environmental information to initially generate a path connecting a starting point and a target point ofthe drone as a pre-planning path; 4) adjusting potential field coefficients according to the improved artificial potential field method, and generating a plurality of candidate paths considering physical constraints; 5) proposing a cost function considering the energy consumption, the safety, the smoothness, and the energy saving of drones in flight; 6) selecting an optimal path by minimizing thecost function. The path planning and obstacle avoiding method for drone is good in adaptability.

The invention relates to an indicator system generation method based on an entropy weight method. Based on the safety management indicator system of the chemical enterprise, the method researches reasonable improvement and updating on the basis of the original indicator system to construct a new indicator system. The basis of improvement is that the historical chemical accident cases act as the analysis data according to the irrationality of the data reverse analysis indicator weight. The entropy weight method is not the algorithm of a large number of sample data assignment, the entropy weightmethod is adopted to evaluate the sample quality to form the sample weight, the weight of the safety indicator system is reversely analyzed and calculated on the basis of the data and the indicator weight is appropriately adjusted and updated. Reasonable and necessary modification is made according to the actual situation so that continuous improvement of enterprise safety supervision and safetyevaluation can be promoted and the risk avoidance can be better performed.

The invention discloses a insulation sound-proof blocks, it is equipped with partition groove; the width, component of blocks and the number of partition groove are determined by the geographical building structure and the energy-saving requirements; the partition grooves are equipped in the blocks from up to down transparently in the separated mode and cross laying; the component of the block (weight percentage)is 15 - 21% bonding agent and the residue of aggregate; said bonding agent is gypsum, lime and cement; the aggregate is the fly ash, slag, construction waste or furnace cinder. The masonry method is: the bondings between blocks are rigid adhesion without grey mouth; the mine thrower dry powder uses the mixed component of same aggregate and cement, the mixing rate is the weight rate which can make the compression strength of mine thrower >=10-15MPa, then the mine thrower dry powder is mixed with water in the amount of collapse degree is 80-100cm, only the slot and the carvel joint of blocks are plastered. The wall body using the invention can be realized no forced cracks and no distortion cracks after the wall body is treated by the invention, the invention hash the characteristics of high combined strength of blocks, energy-saving, low consumption and swift operation.

The embodiment of the invention discloses a navigation method and device for the blind and terminal equipment and belongs to the technical field of navigation for the blind. The navigation method for the blind provided by the invention comprises the following steps of: acquiring information of a sidewalk for the blind; judging whether the sidewalk for the blind has an obstacle or not according to the information of the sidewalk for the blind; if so, judging whether the obstacle is a dynamic obstacle or a stationery obstacle; and performing navigation for the blind differently according to the obstacle judging results. According to the navigation method and device for the blind and the terminal equipment provided by the embodiment of the invention, obstacle-avoiding guidance can be better provided for the blind.

The invention relates to the technical field of teaching equipment, in particular to a novel primary education interaction device. The device comprises a bottom plate, universal wheels are arranged onthe bottom plate, a height adjusting structure is arranged on the bottom plate, the height adjusting structure comprises a sleeve plate, a sliding plate, a second threaded rod, a second driving motor, a worm and a turbine, the second driving motor is provided with the worm, the worm is provided with the turbine, the turbine is provided with the second threaded rod, the second threaded rod is connected with the sliding plate, the sliding plate is connected with the sleeve plate, the sleeve plate is provided with a positioning structure, the sliding plate is provided with a rotating structure,the rotating structure is provided with a mounting plate, the mounting plate is provided with a display screen, the display screen is provided with a writing board, the mounting plate is provided witha dust removing and blocking structure, and the dust removing and blocking structure comprises a U-shaped sliding plate, a first driving motor, a first threaded rod, a yardage roll, a sponge block, afirst bevel gear, a transverse plate, a third bevel gear and a fourth bevel gear. The overall height is conveniently adjusted according to height requirements.

The invention relates to the field of unmanned boat collision avoidance based on a maritime intelligent traffic technology, in particular to a water surface unmanned boat collision avoidance method based on a sliding window and a particle swarm. The method comprises the steps of 1, building a motion model of a water surface unmanned boat; 2, acquiring a motion model of an obstacle; and 3, carryingout obstacle avoidance planning according to algorithms. The particle swarm algorithm and the sliding window method are adopted for carrying out processing, and finally through the combination of thetwo algorithms, the water surface unmanned boat is ensured to well avoid known and unknown dynamic obstacles.

The invention discloses a dustproof and moisture-proof USB slot of a computer, and the slot comprises a slot housing. The interior of the slot housing is provided with a UBS slot and a hollow cavity. A wind-up roller is rotatingly inserted above the hollow cavity, and the surface of the wind-up roller is rotatingly connected with a moisture-proof plate. An iron core strip attracts a permanent magnet, and an inner side wall of the hollow cavity is provided with a chute. The slot is simple in structure, and prevents dust from entering the USB slot through the setting of the moisture-proof plate and a push bar. The iron core strip attracts the permanent magnet, so that the moisture-proof plate blocks a through hole of the USB slot, and prevents the dust from entering into the USB slot and moisture from entering the USB slot. The wind-up roller facilitates the winding of the moisture-proof plate, so that the moisture-proof plate moves upwards, thereby bringing convenience to the people for use. The slot is simple in structure, is convenient for the people to use, can achieve the high dustproof and moisture-proof effects, and guarantees the service life of the USB slot.

The invention relates to an intelligent electric field exceptional safety alarming device which is capable of warning inspection staff to evacuate timely after an electric field changes, and the intelligent electric field exceptional safety alarming device is mainly applied to electric field early warning of key positions and an inspection channel of an electrical power system transformer substation. According to the structure, a power supply device provides power for other parts through a voltage stabilization device; an electromagnetic sensor set sends electromagnetic field intensity signals in a read space to a signal amplifying device, and the signal amplifying device converts received signals into current values capable of being recognized by a microprocessor and transmits the current values to the microprocessor; the microprocessor drives a buzzer or a voice device to give out alert sounds according to the induced electromotive force situation in the space. The intelligent electric field exceptional safety alarming device is arranged on key areas or an inspection route, can remind staff wanting to enter a failure area range to evade risks timely at any time, and is a safety early-warning protecting tool which can provide safety warning for running, inspection, testing and protection of electric power systems and maintenance staff simply, conveniently, effectively and intelligently, and eradicates or evades the occurrence of human casualty accidents.

The invention discloses an Internet of Things intelligent transportation system, in particular a carbon-free, efficient and intelligent random travel traffic system and belongs to the field of Internet of Things technology, track technology, electric energy transmission technology and vehicle automatic driving technology. The carbon-free, efficient and intelligent random travel traffic system is especially suitable for urban traffic. With the carbon-free, efficient and intelligent random travel traffic system adopted, problems such as urban traffic congestion, difficulty in parking and frequent accidents can be solved; and people's needs for personalized and point-to-point travels can be satisfied. The carbon-free, efficient and intelligent random travel traffic system is an automatic transport system which has the advantages of high safety, high efficiency, convenience, zero emissions, low cost, low energy consumption, few consumed resources and convenience in management. The construction cost of subways which is the highest in urban traffic is as high as 400 to 800 million yuan / km, the average speed of the subways is 35 km / h; the construction cost of the system of the invention is less than 1 / 10 of the construction cost of the subways, while, the transport efficiency of the system of the invention can achieve or even be higher than that of the subways; the system is also applicable to intercity transportation and mountainous area transportation; the implementation of the system is based on the full utilization of existing road facilities, and therefore, the waste of existing facilities and redundant construction will be avoided; and people can freely utilize the traffic and turn the traffic into places where people can learn, work, rest, entertain and perform bodybuilding.

The invention discloses a path planning method. According to the invention, a first preset number of driving path schemes can be randomly generated according to initialization parameters required forgenerating a path planning scheme, a selected scheme is determined on the basis of each driving path scheme in combination with a function value of a target function of each driving path scheme, and due to the fact that he target function used in the invention considers the congestion degree of a center place and every two places in each target park, a congestion route can be well avoided, so thattools can be transferred more timely according to the final selection scheme, the waiting time of a user can be reduced to improve the user experience, and the electric energy productivity can be improved. The invention also discloses a path planning device and equipment, which have the same beneficial effects as the path planning method.

The invention discloses a regulation and storage system of a city drainage pipe network. The system comprises integrated regulation and storage devices connected to the drainage pipe network and a remote monitoring terminal which is in communication connection with the integrated regulation and storage devices to obtain data of the integrated regulation and control devices; the remote monitoring terminal is in communication connection with a cloud platform to upload the data to the cloud platform; and the cloud platform is in communication connection with multiple mobile terminals so that the mobile terminals can download needed data; and sends a control or query instruction to the integrated regulation and storage devices via the remote monitoring terminal. When the regulation and storage system is used, data collected by the integrated regulation and control devices is sent to the cloud platform via the remote monitoring terminal, the mobile ends can download data from the cloud platform according to requirements, so that for the cross-area drainage pipe network, real waterlogging conditions of roads in front can be known needless of approaching the site by people or vehicles, and people and vehicles in the surrounding and related main and branch roads can avoid the waterlogging site in advance.

The invention discloses an improved sweeping robot. The robot comprises a moving housing, a cleaning device is arranged at the middle of the lower end surface of the moving housing, a dust storage space is arranged on the rear side of the moving housing, a slanting downward suction opening is formed in the front end wall of the dust storage space, the outer end of a rotating shaft penetrates through the outer end wall of induction space and is fixedly connected with a supporting device, the upper end of the moving housing is provided with a cylindrical block which is integrated with the movinghousing, an annular groove is formed in the cylindrical surface of the cylindrical block, an annular rotating block is mounted in the annular groove, and an image shaper and an acoustic wave locatorare embedded in the front end of the annular rotating block. During working of the robot, an image shaper and an acoustic wave locator work simultaneously, scanning and positioning are conducted to complete a ground distribution map in a room, convenience is provided for completing route planning and obstacle avoidance, the robot automatically flips when the robot is turned over due to fiddling ofpets or children, and normal work is ensured.

The invention discloses a preliminary-grinding and leakage-proof transport device for a lime kiln. The device comprises conveyor belts, a traction power device and a support. Vertical frames are arranged above the support and fixedly provided with multiple upper-layer idler wheels. The upper-layer idler wheels are arranged in a recessed arc shape. Lower-layer idler wheels are arranged below the support. The conveyor belts are arranged above the upper-layer idler wheels and above the lower-layer idler wheels in a covering manner. The two sides of each conveyor belt make contact with the highest positions of the upper-layer idler wheels. The centers of the conveyor belts and the lowest positions of the upper-layer idler wheels are suspended under the no-load condition. By means of the preliminary-grinding and leakage-proof transport device for the lime kiln, materials are prevented from falling in the transport process, the materials are provided continuously and stably for the later machining process, the device is convenient to use and efficient, and production efficiency is improved.

The invention discloses a highly flexible sweeping robot. The robot comprises a moving housing, a cleaning device is arranged at the middle of the lower end surface of the moving housing, dust storagespace is formed in the rear side of the inside of the moving housing, a slanting downward dust suction port is formed in the front end wall of the dust storage space, the outer end of a rotating shaft passes through the outer end wall of induction space and is fixedly connected with a supporting device, the upper end of the moving housing is provided with a cylindrical block which is of an integral structure with the moving housing, an annular groove is formed in the cylindrical surface of the cylindrical block, an annular rotating block is mounted in the annular groove, and an image shaper and a sound wave position finder are embedded in the front end of the annular rotating block. In the working of the robot, the image shaper and the sound wave position finder work simultaneously, scanning and positioning are conducted to complete a ground distribution map in the room, convenience is provided for completing route planning and obstacle avoidance, meanwhile, when the device is turnedover due to fiddling of pets or children, the robot is automatically rotated, and normal work is ensured.

The invention discloses a baby incubator with the light-shielding property. The baby incubator comprises a placement part and a shielding part, the shielding part is covers the outside of the placement part, the placement part includes a box, a box door, two clamping blocks, two handles, two L-shaped clamping plates, four support columns, a support plate and a collecting box. By the arrangement, the inside of the box can be prevented from being polluted by baby's urine, the milk smell and the smell of baby's urine of milk powder can be purified, the internal air of the box can be guaranteed, and the healthy growth of the baby is benefited; the light-shielding function is achieved, the light around the box can be shielded conveniently after sleeping of the baby, and the sleep quality of thebaby is improved favorably; the function of lighting can illuminate the baby, the light emitted by the lamp is softer, the eyes of the baby can be prevented from being harmed by the dazzling light, and affection of the development of the baby's vision can be prevented; good shock absorption performance is achieved, the baby incubator is transparent and observable, not easy to fog and easy to observe the baby inside clearly in real time.

The invention discloses a sweeping robot device. The sweeping robot device comprises a mobile housing, a sweeping device is arranged in the middle of the lower end face of the mobile housing, a dust storage space is formed in the rear side of the inside of the mobile housing, an obliquely downward dust inlet is formed in the front end wall of the dust storage space, the outer end of a rotating shaft penetrates through the outer end face of a sensing space and is fixedly connected with a supporting device, a cylindrical block is arranged at the upper end of the mobile housing and integrated with the mobile housing, an annular groove is formed in the cylindrical surface of the cylindrical block, an annular rotating block is installed in the annular groove, and an image former and an audiolocator are embedded in the front end of the annular rotating block. In work of the sweeping robot device, the image former and the audiolocator work at the same time, an indoor floor distribution diagram is generated through scanning localization, and thus path planning and obstacle avoidance can be completed more easily; when the device is about to topple when touched by a pet or a child, the device can turn over automatically, and thus normal work is guranateed.

The invention discloses a heat treatment device for intelligent manufacturing. The heat treatment device for intelligent manufacturing comprises a base. The two sides of the top of the base are fixedly provided with supporting plates. A first holding plate is welded to the tops of the supporting plates. A water tank is arranged at the bottom of the first holding plate. The bottom of the water tankand the top of a cross plate are fixed. A group of connection rods are installed on the inner bottom wall of the water tank. The side faces of the sides, close to each other, of the two connection rods are fixedly provided with a first heating pipe through locking bolts. The top of the first heating pipe is provided with a heat conducting plate. The side faces of the sides, far away from each other, of the two supporting plates are fixedly provided with a group of installation rods. A first heating box is fixed to the top of the installation rods. The two sides of the first heating box are both provided with openings. The two sides of the inner top wall of the first heating box are both provided with push rod motors. The heat treatment device for intelligent manufacturing is compact in structure, reasonable in design and ingenious in concept, heat is effectively utilized through secondary heating of a metal plate, the treatment effect is improved, operation is easy, and the heat treatment device for intelligent manufacturing is suitable for popularization.

The invention provides an intermittent automatic lifting and transferring device for roll shaft machining, relates to the technical field of machining equipment, and aims to solve the problems that due to the characteristic that roll shafts are prone to rolling, the roll shafts are extremely difficult to transfer in the machining process, if batched violent transfer is adopted, the roll shafts areprone to being damaged, a plurality of detection units need to be adopted to facilitate achieving of the purpose of accurate control, the equipment manufacturing cost is high, the detection failure rate is high, a plurality of driving elements are adopted, the action process is tedious, and the maintenance cost is increased. The device comprises lifting frames, wherein the lifting frames are composed of two vertical frames, and a top supporting table is horizontally and fixedly installed between the upper ends of the two lifting frames. According to the device, due to the fact that a reciprocating lead screw is vertically and rotationally installed in the middle of a rotating mechanism, when a servo motor rotates, a lifting mechanism is driven to move up and down on the reciprocating leadscrew in a reciprocating mode, and therefore lifting and transferring actions are continuously conducted.

The invention provides an electric hoisting embracing pole for building electric transmission line towers in groups. The electric lifting hoisting pole includes an embracing pole body, the bottom of the embracing pole body is fixedly provided with a lifting mechanism, and the lifting mechanism is used for lifting the embracing pole body when the embracing pole body is installed; and the electric hoisting embracing pole further includes a guiding mechanism, the guiding mechanism is used for guiding the embracing pole body vertically upward when lifting the embracing pole body, the guiding mechanism is fixedly arranged on a tower rod through a fastening part, and the top of the embracing pole body is provided with a hoisting mechanism. According to the electric hoisting embracing pole for building the electric transmission line towers in groups, through cooperation of the lifting mechanism and the hoisting mechanism, the spatial position on the side face of the completed electric transmission line tower can be effectively utilized, the embracing pole body is installed as needed, limiting due to the construction complex terrains or small construction ranges of the electric transmission line towers is avoided, and only tiny working plane is required; and meanwhile under the guidance effect of the guiding mechanism, the embracing pole body can further be in place accurately, obstacles avoidance is easy, and occurrence of safety accidents is reduced, the safety risk that electric transmission line towers are built in the mountains in groups is lowered.

The invention provides a short-distance LED (Light Emitting Diode) ultraviolet disinfection lamp, which comprises an LED lamp bead, a chip, a straight tubular shell body, a power supply, a control circuit board and a touch pressure switch, wherein the LED lamp bead, the chip, the power supply, the control circuit board and the touch pressure switch are fixedly arranged in the shell body in sequence; the LED lamp bead is connected onto the chip; the front end of the shell body is provided with a joint part; the joint part is provided with a circular groove; the bottom of the circular groove is provided with a through hole through which the LED lamp bead is clamped in; the touch pressure switch is arranged on the control circuit board; the tail of the shell body is connected with an elastic end cover; the elastic end cover is abutted with the touch pressure switch. The short-distance LED ultraviolet disinfection lamp is small in size, can be carried about, is free from noise and high in stability, is safe and environmentally friendly, and is suitable for being used under various circumstances; energy resource is saved.

The invention relates to the technical field of cleaning robots, in particular to an intelligent cleaning robot mechanical arm visual obstacle avoidance control method, which comprises the following steps that a cleaning robot scans an operation environment through a visual system, environment data of the operation environment are collected, a processing system obtains the environment data collected by the visual system, and the initial scanning data is filtered to obtain scanning data. The intelligent cleaning robot mechanical arm visual obstacle avoidance control method has the advantages that the obstacle can be accurately scanned, the robot is facilitated to avoid the obstacle, and the cleaning robot is prevented from colliding with the obstacle, so that the safety of the cleaning robot is effectively improved; the problems that an existing obstacle avoidance method cannot accurately decide the obstacle avoidance strategy of the robot, the obstacle avoidance stability is poor, and consequently the cleaning robot is prone to collision damage are solved, and the service life of the cleaning robot can be prolonged.

The invention relates to the technical field of processing of car brake pads, and discloses a sand-blasting low-temperature grinding device for processing of a car brake pad. The sand-blasting low-temperature grinding device comprises a collection box; the lateral side of the top of the collection box is fixedly connected with the bottom of a hydraulic rod; the top of the hydraulic rod is fixedlyconnected with the lateral side of the bottom of a top plate; the bottom of the top plate is fixedly connected with a double-axis motor through a fixing frame; a bottom output shaft of the double-axismotor is connected with a low-temperature grinding mechanism; the middle of the top of the collection box is fixedly connected with a rotary motor; an output shaft of the rotary motor is fixedly connected with the bottom of a shelf; the collection box is connected with a water circulation mechanism; and a top output shaft of the double-axis motor is connected with an anti-precipitation mechanism.A mixture of water and metal powder is added when a car brake pad is ground; on the one hand, the temperature generated during grinding is lowered; on the other hand, the car brake pad is more thoroughly ground by the metal powder; moreover, chippings generated by grinding can be impacted by the water; and iron scraps are processed.

The invention discloses a pick-up head capable of effectively preventing privacy leakage. The pick-up head employs a circular head design. A rotatable arc baffle plate is arranged at the outer side of a housing; and a rotating horizontal rod is arranged at the top of the baffle plate. When not in use, the pick-up head can be shielded conveniently, so that the illegal pick-up head stealing based on the hacker attack can be prevented and thus the privacy of the user can be effectively protected. When the pick-up head starts to work, the user watches the work state of the pick-up head visually by the state indication lamp, thereby further enhancing the security of the pick-up head. The pick-up head also can be used conveniently.

The invention discloses an agricultural and sideline product drying device, which comprises a body. The middle end of the top of the body is fixedly connected with a motor box, and a motor is fixedlymounted in an inner cavity of the motor box; an output shaft of the motor is fixedly connected with a placement plate, and the bottom of the placement plate is fixedly connected with a hook; the upperend of the right side of the body is fixedly connected with a fixing plate, and the right side of the fixing plate is fixedly connected with a heating box; and the middle end of the bottom of the fixing plate is fixedly connected with a supporting seat. The bottom of the placement plate is fixedly connected with the hook, and thus the effect of product placement is achieved; the motor is fixedlymounted in the inner cavity of the motor box, the output shaft of the motor is fixedly connected with the placement plate, and thus the effect of rotary drying is achieved; the top of an air conveyingpipe is fixedly connected with a spray head, and thus the effect of hot gas spraying is achieved; and the problems that as for an existing drying device, the drying effect is poor, drying treatment cannot be conducted comprehensively, uneven drying is prone to occurring, and thus the agricultural and sideline product processing quality is poor are solved.

The invention belongs to the technical field of cleaning robots, and particularly relates to an operation robot for indoor floor cleaning which includes: a bottom plate; a transverse moving mechanismwhich is arranged on the bottom plate and used for driving the bottom plate to transversely move on the indoor ground; a dust collection and removal mechanism which is arranged on the bottom plate, and is used for treating dust and foreign matters on the ground when the transverse moving mechanism drives the bottom plate to transversely move. The operation robot has two movable cleaning modes; herein, the transverse moving mechanism and the longitudinal moving mechanism can drive the bottom plate to transversely and longitudinally move indoors, so that the operation robot has two advantages ofconvenient obstacle avoidance and convenient and rapid movement; meanwhile, the dust collection and object removal mechanism and the mopping mechanism are separated during working, the dust collection and object removal mechanism is driven by the transverse moving mechanism to clean the ground, then a mopping mechanism is driven by the longitudinal moving mechanism to conduct mopping treatment on the opposite face, and therefore the beneficial effect of being good in cleaning effect is achieved.

The invention discloses a foldable portable mirror therapy device. The device includes a hand placement plate, a first connection plate, a second connection plate and a protective jacket plate which can be foldably connected in sequence. A plane mirror is arranged on the protective jacket plate, and a skin-friendly anti-bacterial coating layer is arranged on the surface of the hand placement plateand obtained by brushing skin-friendly anti-bacterial coating on the surface of the hand placement plate and then drying. The device is provided with a baffle of which the front-and-back position, the height and the angle can be freely adjusted, the hand on the healthy side of a patient can be conveniently prevented from coming into the patient's view, and treatment is thus facilitated. Through the arrangement of the skin-friendly anti-bacterial coating layer, the surface of the hand placement plate with which a patient makes contact has good skin-friendly performance, good anti-bacterial performance and good comfort level, the health of the patient can be ensured, and the use effect of the mirror therapy device is improved. The foldable portable mirror therapy device is reasonable in structure, convenient to use, and conducive to mirror therapy of the patient, the rehabilitation efficiency is improved, and the device has high application and popularization value.

The invention discloses a cleaning device and a control method thereof. A device body on the cleaning device is provided with a rotary rolling assembly used for cleaning the ground and driving the cleaning device to move on the ground; the rotary roller assembly comprises a first rotary roller, a second rotary roller and a third rotary roller which can fix the cleaner and can make contact with the ground to rotate and roll; a controller is further arranged in the device body, and when the controller controls the first rotating roller to rotate and roll and controls at least one of the second rotating roller and the third rotating roller to rotate and roll, the cleaning devices which rotate and roll can drive the cleaning device to move on the ground. According to the control method of the cleaning device, the cleaning device is driven to move by controlling the rotary rolling assembly. According to the scheme, the problems that an existing cleaning device is complex in structure and cannot well distribute the area of the mop cloth due to the arrangement of a driving wheel are solved, and the problems that the existing cleaning device is poor in moving and walking stability, prone to deviation and cannot effectively clean the edge position due to the fact that the existing cleaning device moves through the mop cloth are solved.

The invention discloses a dustproof transport device for a discharging opening for accurate grinding of lime. The dustproof transport device comprises conveyor belts, a traction power device and a support. A cabinet dustproof cover is arranged between a discharging tower above the conveyor belts and the conveyor belts. The discharging opening below the discharging tower is sealed in the dustproof cover. Vertical frames are arranged above the support and fixedly provided with multiple upper-layer idler wheels. The upper-layer idler wheels are arranged in a recessed arc shape. Lower-layer idler wheels are arranged below the support. The conveyor belts are arranged above the upper-layer idler wheels and above the lower-layer idler wheels in a covering manner. The two sides of each conveyor belt make contact with the highest positions of the upper-layer idler wheels. The centers of the conveyor belts and the lowest positions of the upper-layer idler wheels are suspended under the no-load condition. Arc supporting plates for supporting the conveyor belts are arranged at the positions, below the discharging opening, of the lower sides of the conveyor belts. By means of the dustproof transport device for the discharging opening for accurate grinding of the lime, dust pollution is avoided, control over falling of materials is facilitated, material blockage is avoided, and production and machining efficiency is improved.