924results about How to "Guaranteed utilization" patented technology

The invention discloses a resource scheduling method under a Hadoop-based multi-job environment, which includes: (1) collecting the three-party monitoring information of cluster loads, a Hadoop platform and hardware in real time; (2) collecting the job execution monitoring information of a user on each computing node of a cluster in real time; (3) gathering the three-party monitoring data of the cluster, modeling to evaluate the computing capabilities of the nodes, and dividing the nodes of the cluster into superior computing nodes and inferior computing nodes; (4) if the nodes are the superior computing nodes, then starting a job task resource demand allocation policy based on similarity evaluation; (5) if the nodes are the inferior computing nodes, then returning to a default resource demand allocation policy of the Yarn. The resource scheduling method under the Hadoop-based multi-job environment solves the problem of resource fragments caused by oversize job resource demand division granularity in conventional resource schedulers of the Yarn, can comprehensively take the heterogeneity of cluster nodes and jobs into consideration, and increases the execution concurrency of the cluster by reasonably and effectively allocating the node resources, thus increasing the execution efficiency of the multiple jobs of the Hadoop cluster.

The invention relates to the field of production machining mechanical equipment and discloses full-automatic feeding, cutting and receiving equipment. A material slot of a feeding device of the full-automatic feeding, cutting and receiving equipment is provided with a shifting mechanism consisting of a shifting fork and a shifting rod. The end of the shifting mechanism, which corresponds to a rear baffle plate of the feeding device, is provided with a leveling mechanism. A feeding bracket at the side of an unloading mechanism, which is correspondingly connected with a tube cutting device, is provided with a clamping mechanism. A lower roller and a side roller which are connected are arranged in the unloading mechanism. A split clamp of the tube cutting device is arranged on a tube cutting bracket through a trapezoid block. A recovery device consists of a recovery mechanism and a return mechanism, wherein the recovery mechanism is arranged at one side of the split clamp in a leveling mode; and the return mechanism is arranged on a recovery bracket at the rear end of the recovery mechanism. A brush wheel is arranged in the return mechanism. A machining method of the equipment comprises the steps of adding, aligning, feeding, cutting and receiving. The full-automatic feeding, cutting and receiving equipment is smooth to feed materials and is clear to separate the materials, so that resource waste is avoided, the machining procedures of the engineering are reduced, the cutting quality is improved, both manpower and material resources are saved and the production efficiency is improved.

The invention provides a full-automatic library service station and an operation method thereof. The service station comprises a computer, a displayer, a printer, a keyboard, a library card reader, an identification card scanner, a library card transaction unit and a mechanical conveying device, wherein the computer serves as a main control unit; the displayer and the printer serve as information output units; the keyboard serves as an information input unit; the library card reader and the identification card scanner serve as information input equipment; the library card transaction unit is connected with the computer; the mechanical conveying device is controlled by the computer; the service station main body is a sealed cabinet body which comprises an operation platform and book shelves; the displayer, the keyboard, the printer, the library card reader, the identification card scanner and the library card transaction unit are positioned on the operation platform which is also provided with a book inlet and a book outlet; book separation columns are formed on the book shelves by clapboards; each book separation column corresponds to a piece of position information; under the control of the computer, the conveying device conveys books between the book inlet, the book outlet and the shelves by manipulators arranged per se.

The invention discloses a flexible switching system for a vehicle welding production line. The flexible switching system is used for solving the problems of low operating efficiency and poor universality in a current vehicle welding production line. The flexible switching system comprises a piece supplying mechanism, a transition track, a storage mechanism, a rotating platform, a trolley, a steering track switching mechanism and a lifting track switching mechanism, wherein the piece supplying mechanism and the rotating platform are arranged on two ends of the transition track, the storage mechanism is arranged on two sides of the transition track, the steering track switching mechanism is mounted in a joint position of the storage mechanism and the transition track, the lifting track switching mechanism is arranged on the transition track, and the trolley can move among the piece supplying mechanism, the storage mechanism and the rotating platform. According to the flexible switching system, an operating speed of a welding production line is improved, and synchronous operations of the piece supplying and the welding are realized. The flexible switching system is suitable for the mixing-line production of various vehicles, so that the cost on equipment development and operation is lowered, and the efficiency of welding production is improved.

The invention discloses a dynamic polymer material. The dynamic polymer material comprises a product obtained through reaction of the following components: at least one polyol compound containing two or more 1,2-diol motifs or 1,3-diol motifs as well as at least one phenylboronic acid compound containing two or more phenylboronic acid motifs provided with aminomethyl groups in ortho-positions. Dynamic reversible phenylborate bonds are formed through the reaction of the components and then constitute a dynamic cross-linked polymer. The polymer material has reusability and recoverability because of the dynamic reversibility of the special phenylborate bonds; besides, when the polymer material adopting a specific formula receives external force, dynamic bonds break preferentially to have energy dissipation and stress elimination functions, so that the material has good toughness. The material has broad application prospect in the fields of military space equipment, functional paint and coatings, biomimetic materials, biomedical materials and the like.

The invention relates to a complex antibacterial fiber, a fabric and a preparation method thereof, in particular to an irradiation grafting coordination group on the surface of the fiber and on the surface of the fabric, the complex antibacterial fiber loading antibacterial components Ag, Cu and Zn and the composition thereof, the fabric and the preparation method thereof. The method improves the mobility of the antibacterial components in a fiber surface liquid film, has favorable sterilization effect and antibacterial effect, is suitable for modification of organic polymer fibers and fabrics of various types and preparation of corresponding broad-spectrum antibacterial fibers and fabrics, does not generate negative influences on the hygroscopicity, the air permeability and the mechanical properties of the fibers and the fabrics, has simple preparation technology, and is convenient to realize industrialization and lower the production cost.

The invention provides a transfer method of a graphene film, which at least comprises the following steps: providing a metal substrate, and sequentially forming a graphene film, an organic polymer protective layer and a polymer frame support layer on the metal substrate surface, wherein the organic polymer protective layer and polymer frame support layer respectively have surface energy or viscosity; peeling the graphene film from the metal substrate, and attaching the graphene film to a target substrate; and finally, sequentially peeling the polymer frame support layer and organic polymer protective layer. By utilizing the proper surface energy or proper viscosity of the organic polymer protective layer and polymer frame support layer, the organic polymer protective layer and polymer frame support layer can be directly attached without any adhesive, and can be peeled without damage after transfer, thereby simplifying and stabilizing the technique and ensuring the complete transfer of the graphene film and the reutilization of the metal substrate.

The invention relates to a coordination operation method of a pneumoelectric integration energy distribution network system. An alternating current trend in a power distribution network and gas water conservancy calculating in a gas distribution network are simultaneously considered. A combined cooling heating and power system (CCHP) in a system is taken as a coupling component of the gas distribution network and the power distribution network. Mathematical modeling is performed on a nonlinear multi-energy coupling external characteristic of the CCHP system. Through coordinating and optimizing operation of the CCHP system, a power fluctuation of distributed new energy of the power distribution network is transferred to the gas distribution network and a cold / heat supply system so that a power distribution network connection line exchange power fluctuation is restrained. For a mixing integer non-linear planning problem corresponding to the above model, the invention provides a two-stage optimization algorithm to solve. A simulation example shows that under the condition that a new energy utilization rate of an integration energy system is guaranteed, the method can be used to effectively restrain the power fluctuation on a connection line under different season scenes.

The invention relates to a pebble-bed module type high-temperature gas cooled reactor fuel loading and unloading system which comprises a reactor (10), a reactor core fuel circulating system (20), a new fuel loading system (300) and a spent fuel unloading system (400). The reactor (10) comprises a reactor pressure container (11), a graphite coating reactor internal component (12), a central reactor core cylinder (13), a metal reactor internal component (15) and an unloading pipe (14), the reactor core fuel circulating system (20) comprises a reactor core unloading system (100) and a reactor core loading system (200) and further comprises a helium pneumatic conveying system (500), a compressed air pneumatic conveying system (600), a vacuum pumping system (700) and a helium supplying and recycling system (800), and the compressed air pneumatic conveying system (600), the vacuum pumping system (700) and the helium supplying and recycling system (800) are all connected with the helium pneumatic conveying system (500). The helium pneumatic conveying system (500) is further respectively connected with the reactor (10), the reactor core fuel circulating system (20), the new fuel loading system (300) and the spent fuel unloading system (400).

The invention provides a multipath TCP (transmission control protocol) congestion control method based on continuous message marks. The multipath TCP congestion control method based on the continuous message marks comprises the following steps of adding congestion marks on outputted messages by using an exchanger when a buffer queue length is greater than a mark threshold value K; confirming message feedback congestion marks by using a receiver server; receiving confirmed messages and confirming a message matrix MTi by using a transmitter server according to mark updating; calculating the sum of variable quantities of the matrix in a time bucket T; calculating a congestion factor alpha if the sum of the variable quantities of the matrix in the time bucket T is greater than a congestion threshold value theta; proportionally reducing congestion windows according to the alpha under the condition that the alpha is smaller than or equal to 1 / 2; transmitting mark locations of congestion window reduction of the messages; and increasing the congestion windows according to a coupled growing algorithm if the value in the specification is not greater than theta or the confirmed messages do not have congestion marks. Congestion state information of paths can be accurately fed back to a transmitter within an RTT (round-trip time), the congestion windows are reduced in a restraint manner proportionally, various links are utilized sufficiently, implementation of multipath transmission is guaranteed, and the multipath TCP congestion control method is suitable for a data center network of a multipath framework.

The invention discloses a calculation method of power supply capability of a power distribution system. The calculation method is characterized in that the 'N-1' safety criterion is adopted as the premise, the interconnection relation of a main transformer is adopted as the basis, the upper-lower level coordination relation of the power distribution system is fully considered, the influence of load transfer limit of medium-voltage connection and short-time overload of the high-voltage main transformer are considered, and the power supply capability of the power distribution system can be accurately estimated, so that the deficiency of the load supply capability estimation on quantity when the single voltage level is only considered is avoided; the limit of the whole load supply capability of the power distribution system can be accurately mastered, so that the planning and the construction of the power distribution system is guided; and when the regional load increases in certain degree, the requirement for load increase is met by discovering the power supply capability of the existing power supply facilities. According to the method, the limit utilization ratio of the power distribution equipment can be determined on the premise of meeting the safety of the system and reference for a supply transferring scheme can be provided when the equipment fails, thus the operation scheduling of the power distribution system is guided and the method is beneficial to the effective use of the power distribution system facilities in power supply enterprises.

The invention discloses a method for improving the bench blasting quality of a deep-hole of super-hard rocks. The method includes the following steps that blast holes are formed in a step of a blast area, hole mesh parameters are determined, and perpendicular drilling is conducted; explosive loading structures are determined, and the explosive loading structures for segmented explosive loading and mixed explosive loading are adopted in the blast holes at the same time; explosives are determined, wherein the explosives are selected according to according to matching coefficients of explosive wave impedance and rock wave impedance; blasting parameters are determined and include the length W of a resistance line of a base plate, the hole pitch a, the row distance b, the super depth h and the blast hole filling length l; and blasting is conducted, wherein the explosives are loaded, the blast holes are filled with stemming on the tops of the blast holes, reverse blasting is conducted from the bottoms of the blast holes, and blasting is conducted in an inter-hole elementary error sequence. According to the method for improving the bench blasting quality of the deep-hole of super-hard rocks, due to the fact that the hole mesh parameters, the explosive loading structures, the explosives, the blasting parameters, the blasting position and the blasting sequence are reasonably selected, multi-way comprehensive functions are achieved, the performance of the explosives is fully achieved, the sufficient reaction of the explosives is ensured, the utilization rate of the blast holes is increased, and the boulder frequency and bedrocks of rock blasting are reduced.

The invention relates to a novel crucible capable of reducing inclusions in silicon carbide single crystals and a method for growing single crystals by using the crucible. The novel crucible comprises an outer crucible and a crucible cover, wherein an inner crucible is arranged in the outer crucible; the inner crucible comprises a bottom and a side wall; the side wall is a double-layer side wall; the double-layer side wall comprises an inner wall and an outer wall; small holes penetrating through the inner wall are formed in the inner wall; an annular end cover for sealing an interlayer between the inner wall and the outer wall is arranged at the upper end opening of the double-layer side wall. The inner crucible of the crucible closes SiC powder, which is located at a high temperature position and is easy to carbonize, in the interlayer between the inner wall and the outer wall of the inner crucible, so that powdered carbonized tiny carbon particles cannot be transported to the surfaces of seed crystals; meanwhile, powder in an inner cavity achieves a filter effect on a pyrolytic gas phase in the interlayer, so that the carbon particles are prevented from being transmitted to the surfaces of the SiC single crystals; therefore, carbon inclusions in the SiC single crystals are greatly reduced, and even in the SiC single crystals with the thickness of 20 mm, still no carbon inclusions are generated.

The present invention discloses a polymerization ferric sulfate water treatment agent and a preparation method thereof. According to the present invention, H2O2 and FeSO4.7H2O are adopted, a molar ratio of the H2O2 to the FeSO4.7H2O is 1.1-2.0:2, and the H2O2 and Fe<2+> are subjected to an oxidation reaction to prepare the polymerization ferric sulfate water treatment agent so as to rapidly produce products meeting user requirements, wherein production is rapid, a reaction temperature is controlled no higher than 40 DEG C so as to ensure a H2O2 utilization rate and a Fe<2+> conversion rate, and raw material utilization rate can be more than 95%; and the method has characteristics of simple production process, simple reaction apparatus, easy operation, low raw material consumption, and low cost, and can be used for industrial production.

The invention discloses a scheduling method for an export container wharf pile-up space. Two-stage modeling is performed from plan allocation to dynamic allocation. At a pre-allocation stage, a block plan is researched, and the follow-up dynamic allocation is guided by the block plan. In the block plan, a block allocation model based on the ecological neutral theory is proposed. According to the block allocation model, container blocks are abstracted as islands, and container groups are abstracted as species, and thus, a process of allocating the container groups to the container blocks is escaped into a process that ecological selection is performed on the islands by a plurality of species. Based on the block allocation model, by aiming at the characteristic of the block plan problem, the block allocation model is optimized by the scheduling method for the export container wharf pile-up space, and an improved ecological neutral theory model is proposed. At a dynamic allocation stage, yard bay allocation and container space allocation are combined, solving is optimized by bi-objective combination, and a combination cellular automaton model is proposed. According to the combination cellular automaton model, the yard bay allocation is abstracted as an external cellular model, and the container space allocation is abstracted as an internal cellular model.

The invention discloses a wind-driven power generator yaw control method and module and a control device based on the control module, relates to the wind-driven power generator yaw control technology, and aims to solve the problem that the instantaneous wind direction interferes yaw control to allow a yaw unit to be started frequently, and unstable current output, difficulty in control and cabin service life lowering are caused. If wind speed exceeds a set value range or the deviation angle of the wind direction and a cabin is not larger than 16 degrees, the yaw unit keeps the state; if the deviation angle ranges between 16 degrees and 180 degrees, a yaw motor rotates reversely, or else the yaw motor rotates forwardly, and wind-driven power generator yaw control is achieved. The wind-driven power generator yaw control module is embedded into the control device based on the module. The yaw unit has a delay starting function and adopts error control, interference caused by the instantaneous wind speed is prevented, wind energy utilization rate is guaranteed, the situations of frequent starting and control difficulty caused by zero alignment are avoided, and cabin service life can be prolonged. The control method and module and the control device are applicable to wind-driven power generator yaw control.

A hinge blade nest cutting winding progressive die comprises up die and bottom die and the connecting guide post, with the up die having stirrup punch head, three claw punch head and two claw punch head, with the bottom die having stirrup, three claw die and two claw die, with the later tow having a horizontal slide path, one side of which having a discharge device linked with the up die, bending die linked with the up die on the other side, and the winding die. It realizes the one time forming with the stirrup, shear cutting, bending and winding, with precision and improved production efficiency and reduced cost. One set of die, a punch machine and an operator will get everything done.

The invention relates to a multilevel index technology for file database, in particular to a watermark access mechanism adopted by an InforGuard watermark module. The technology comprises such two steps as data storage and data query. Index is stored by establishing independent index files and according to an HASH algorithm. By the multilevel index technology located rapidly in two phases, the invention overcomes the weakness of the traditional file database of low efficiency, thus obviously improving the property of data query in the file database.

The invention discloses an efficient rainwater filter and belongs to the technical field of rainwater treatment devices. The efficient rainwater filter comprises a filter communicated with a drain pipe, a collecting pipe with a water hole is coaxially arranged in the filter, and a central cylinder is coaxially arranged in the collecting pipe. The central cylinder is provided with an overflow hole, the bottom end of the central cylinder is communicated with the drain pipe, and a rainwater retention channel is formed between the collecting pipe and the central cylinder. Rainwater accumulated in the rainwater retention channel is discharged through the overflow hole in the central cylinder. The efficient rainwater filter is simple in structure and convenient to manufacture and use; in the whole filtering process, not only is full contact between the rainwater and a filtering medium guaranteed, but also pollutants in the rainwater can be effectively removed, and the filtering medium utilization rate and the treatment efficiency of the filter are also guaranteed.

The embodiment of the present invention discloses a method of regulation of report frequency of position information, and the problem is solved that large amounts of redundant position information is easily generated because of the constant report frequency of a GPS module in the prior art. The method provided by the embodiment of the invention comprises: obtaining position information generated by the GPS module of a smart device; obtaining current movement speed of the smart device according to the position information; and regulating the report frequency of the GPS module according to the movement speed, the magnitude of the movement speed being in direct proportion to the report frequency. The embodiment of the invention further provides a device of regulation of report frequency of position information.

The present invention belongs to the technical field of pharmaceutical logistics and provides a method and a system for checking and sorting scattered commodities in the pharmaceutical logistics field. The method comprises the steps of order receiving step, rechecking station assignment step, storage bit allocation step, commodity collection sliding channel allocation step, and rechecking station release step. The characteristics of scattered orders at a logistics center are fully considered, and different sorting treatments are conducted for different types of orders. Therefore, the utilization rate of automatically rechecking and sorting sliding channels is ensured. Meanwhile, the difficult problem of commodity collection for large orders is solved. Commodities of the same order are ensured to be processed on the same rechecking station as much as possible. Therefore, commodities of the same order are packaged as one package during the rechecking and packaging process, so that the defect of scattered packages is avoided. The packaging cost and the transportation cost are reduced, and the package receiving experience of users is improved. According to the technical scheme of the invention, the application of commodity collection sliding channels relieves the rechecking and packaging pressure for a bulk of scattered orders in a limited space. Meanwhile, the congestion of a rechecking and sorting line caused by the large amount of turnover box splitting and sorting work can be avoided.

The invention discloses a lithium sulfur battery positive electrode material and a preparation method thereof, wherein the lithium sulfur battery positive electrode material includes a sulfur carbon nano composite material, the sulfur carbon nano composite material includes carbon nanotubes, TiO2 nano particles and nano sulfur powder, the carbon nanotubes are intertwined to form micron grade carbon balls with nano micropore structures which are interconnected, the TiO2 nanoparticles areuniformly dispersed and embedded in the micron grade carbon balls to form composite carbon microspheres, and the nano sulfur powder is evenly filled in the composite carbon microspheres. Sulfur is infiltrated into the composite microspheres which are formed by coating of the TiO2 nanoparticles with the carbon nanotubes, and the lithium sulfur battery positive electrode material is prepared in a water-in-oil microemulsion system. The obtained material is a regular spherical structure with monodispersity and uniformity. After sulfur infiltration, the sulfur is uniformly filled into the microspheres, and the capacity is fully utilized during charging and discharging processes, and the structure can be controlled at the same time.

The invention relates to a magnetic leakage type mechanical variable flux permanent magnet synchronous motor. The magnetic leakage type mechanical variable flux permanent magnet synchronous motor consists of a motor body and a mechanical magnetism regulation device. A mechanical transmission manner is adopted to achieve the purpose that the working magnetic field of the motor can be regulated, and the magnetic leakage type mechanical variable flux permanent magnet synchronous motor is a mechanical magnetism regulation permanent magnet synchronous motor which is applied to the driving fields of electric vehicles or hybrid electric vehicles.

The invention discloses a big data platform-based power data processing method. The method comprises the steps of obtaining application data in a power network; performing collection processing on the application data according to a preset mode, and after a data form is formed, sending and storing the processed collected data in a big data platform matched with the power network; in the big data platform, performing visualization processing on the collected data and performing real-time display; performing associative condition analysis on the collected data by adopting a clustering algorithm, and finding out key power nodes in the power network; and analyzing historical fault data in the power nodes by adopting an associative rule method, performing assessment and continuous tracking on the power nodes, and when operation of a node has a fault, performing prediction to obtain fault conditions of other nodes. According to the big data platform-based power data processing method, the power data collection and utilization efficiency can be improved and the fault point prediction can be accurately realized.

The method divides the memory area into two portions: one portion is partitioned into static memory blocks in several sizes defined in advance; the other portion is shared dynamic memory area. In static memory, certain number of blocks is allocated for different memory sizes, and blocks will not be split or mergered. The shared dynamic memory area can be allocated dynamically. It is guaranteed that each memory block in various sizes possesses a minimum quantity in order to meet basic application. Meanwhile, limited resources of memory area are utilized fully. The invention assures service efficiency and utilization rate of memory area, solves conflict between shortage of memory area and low availability factor, as well as avoids complex maintenance in operation. The method is applied to management for each memory, data table and periphery memory area, as well as can manages multiform or / and multiple memory areas.

The invention relates to high-efficiency sulfurizing hydrargyrum-removing porous nanometer carbon and a preparation method thereof, belonging to the field of chemistry. The preparation method comprises the following steps of: mixing porous nanometer carbon and sulfur, and then placing into a closed pressure vessel with dry ice or liquid carbon dioxide together; heating the closed pressure vessel to 31-200 DEG C to make the carbon dioxide reach a supercritical state, keeping for 1-48 hours, or heating the carbon dioxide to the supercritical state, then injecting into the closed pressure vesselcontaining a mixture of the porous nanometer carbon and the sulfur, and keeping for 1-48 hours; and then cooling to room temperature, and evacuating the carbon dioxide so as to prepare the sulfurizing porous nanometer carbon, wherein the mass percent of the sulfur contained in the sulfurizing porous nanometer carbon is 2-50 percent. According to the invention, high sulfurizing quantity and the quantity as well as the specific surface area of the sulfur available during hydrargyrum removal are furthest ensured by tactfully adopting the gas-liquid dual property of the supercritical carbon dioxide, and therefore an optimal hydrargyrum removing effect is achieved; in addition, the advantages of simple process, high efficiency, environment friendliness and low cost are achieved.

The invention provides an A0-grade pure electric car power battery arrangement scheme. A power battery and an installing structure of the power battery are arranged under a vehicle body floor, are positioned between left and right vertical beams and front and back suspension frames, and maintain reasonable gaps with the left and right vertical beams and the front and back suspension frames, and the space requirements of charging wire harnesses and braking oil pipes are met. According to parameters including the arrangement requirements of the man-machine engineering, the structure of a vehicle body lower floor, an installing structure of a chair, the arrangement requirements of internal battery cells of the power battery and the like, the structure is designed into the step-shaped structure with different heights that the front section of the battery is lower, and the back section of the battery is higher. A lower bottom surface is determined to ensure that the minimum ground clearance and the vertical passing angle of the whole vehicle meet the whole vehicle design relevant requirements. The A0-grade pure electric car power battery arrangement scheme has the advantages that the maximum size of the battery is ensured, the utilization rate of the internal space of the power battery is ensured, and the modification on the prototype vehicle is reduced to the maximum degree. The reasonable axial load distribution of the whole vehicle is ensured through the arrangement position of the power battery on the whole vehicle, so the vehicle has good operation stability, and the running safety of the vehicle is ensured.

The invention discloses a closed wound surface treatment dressing system; polyurethane sponge is arranged on non-adhesive gauze; silica gel film is coated on the polyurethane sponge; an instilment tube and a diversion tube are respectively threaded through the silica gel film to be inserted into the polyurethane sponge; the instilment tube and the diversion tube maintained in the polyurethane sponge are respectively provided with side holes; the diversion tube is connected with the inlet tube of a diversion bottle; multi-porous adsorption material is arranged in the diversion bottle; the inlet tube and an outlet tube are respectively inserted into the diversion bottle; gap is maintained between the inlet and the outlet tubes, and the multi-porous adsorption material. The wound surface closed dressing is mainly composed of silica gel film with instilment and diversion tubes, and polyurethane sponge; the materials are all produced domestically and have good quality and low prices; the wound surface closed dressing has simple structure and convenient operation; the negative pressure diversion bottle connected with the wound surface closed dressing has an inverse flow prevention design, so as to facilitate the wild emergency treatment and the popularization in various types of hospitals including the basic level and country medical treatments units, and the VAC technology.

A water scrubbing cleaning device mainly comprises at least one brushing disc, suction ports, suction channels, a water spraying mechanism and a sewage collecting mechanism. The middle of each brushing disc is provided with the suction port. Each brushing disc is provided with at least one of bristles, brushing sheets and brushing strips. When each brushing disc rotates, the brushing sheets or thebrushing strips rotate centripetally. The bottom of each suction channel is provided with the suction port, and the top of each suction channel is provided with an air intake of an impeller. The water spraying mechanism comprises a clean water tank, at least one of a water pump, an air pump or a water valve or an air valve, and nozzles disposed at edges of brushing disc bodies. The sewage collecting mechanism comprises a sewage collecting tank, a sewage outlet and a sewage tank. The sewage outlet is positioned at the lowest position of the sewage collecting tank. A sewage inlet of the sewagetank is positioned at the highest position of the sewage tank. A clean water outlet of the clean water tank is positioned at the lowest position of the clean water tank. The top of each brushing discbody, approaching an outer edge of the brushing disc, is provided with projections or recesses which are distributed annularly and concentrically relative to the brushing disc. Waist-shaped holes andwaist-shaped grooves between the projections or recesses are arranged at an interval. The nozzles are inserted between the projections or recesses obliquely toward the lower right.