450results about How to "Guarantee the quality of use" patented technology

The invention discloses a full automatic instrument for extracting nucleic acids, which is capable of fully automating the processes of acquiring sample information, automatically adding samples, automatically loading consumptive materials, automatically monitoring the extraction process, and establishing a PCR reaction system. The full automatic instrument for extracting nucleic acids comprises a working platform, a sample adding system which is mounted on the working platform, a deep-well multiwell plate movement device and a nucleic acid extraction device, wherein a plurality of working positions are arranged on the working platform and comprise a sample area, a reagent area and an extract product storage area. The sample adding system respectively adds the sample and a PCR reaction reagent into the deep-well multiwell plate movement device and the extract product storage area from the sample area and the reagent area respectively, the sample is moved below the nucleic acid extraction device by the deep-well multiwell plate movement device and allowed to perform the nucleic acid extraction reaction, and the extraction products are stored in the extract product storage area. The impact of human factor on experimental result can be effectively reduced, and the purity the extracted nucleic acid and the nucleic acid extraction efficiency can be improved.

The invention provides a multifunctional household air energy pot which comprises an upper cover, an inner container, a heat insulating cover and a shell; a fan drive component and an electric heating pipe are arranged at the bottom of the heat insulating cover, the fan drive component comprises a drive motor, an upper fan blade and a lower fan blade, the upper fan blade and the lower fan blade are respectively adaptively mounted on a middle shaft of the drive motor, the drive motor drives the upper fan blade to rotate to form a hot air circulation path for heating the inner container, so that the air heat of a heat source is ensured, food is quickly and uniformly heated, and the food baking effect is ensured; meanwhile, the drive motor drives the lower fan blade to form a cold air circulation path for cooling the shell and drive motor, so that the use quality of products is ensured; as the heat insulation cover has an upper placing level convenient for installation of the inner container, the inner container can be replaced according to the type of the food to be processed, so that the food baking function and the food cooking function in the same equipment are achieved; the multifunctional household air energy pot is convenient to use and strong in adaptability.

The invention provides a medium-and-long-term load prediction research and management integration application system. The medium-and-long-term load prediction research and management integration application system comprises a data management unit, a database, a regional macro economy prediction unit, a power demand analytical prediction unit and a data publishing and display unit. By the adoption of the regional macro economy prediction unit, power demand analytical prediction is built on the basis of macro economy prediction; macro economy data, industrial economy data, energy supply and demand data, meteorological data, power supply and power production data and the like are integrated; a unified data warehouse is built; a load prediction index system is unified; the management quality of a data source is effectively improved; real-time hierarchy interconnection, classified management and hierarchical application and sharing are realized; the problems that data are incomplete, data quality cannot be ensured and barriers exist in usage of basic data in each department are effectively solved; the working efficiency is greatly improved; a scientific basis is provided for programming of plans and decisions of a grid company.

The invention discloses a water-based nano-coating for thermal insulation of building walls, and relates to the technical field of nano-coatings. The water-based nano-coating prepared by the invention consists of a surface coating, an intermediate coating and a primer coating, and is suitable for using water as a diluting solvent. Improve the safety of use; and the surface coating formed by the surface coating has the functions of solar heat reflection, waterproof, and self-cleaning; Anti-corrosion function, so as to meet the requirements of the building wall for the use of coatings, ensure the quality of the coating, and prolong the service life of the coating.

The invention relates to the manufacturing field of batteries, and particularly discloses a storage battery lead terminal casting mould. A left template and a row orientation plate of the casting mould are connected through an automatic buckling device, and further, a first press block is connected with the row orientation plate by a movable buckle. The automatic buckling device is arranged to make the row orientation plate not move firstly in mould opening, and the press block and an insert pin move backwards, so after the insert pin is separated from a lead terminal product, the row orientation plate is separated from the left template to complete mould opening, the product can not move along with the mould opening, and caused appearance deformation or damage of the product is avoided. The movable buckle is arranged to not only ensure the functions, but also make the whole mould opening process more coherent, which facilitates operation. Further, the left template is also provided with a stop block so as to accurately position a gate late, the internal structure of the cast lead terminal product is compact, and the defective rate of products is reduced. The lead terminal product of the casting mould disclosed by the invention has attractive appearance, is not deformed, has a compact internal structure, and provides guarantee for the storage battery quality.

The invention provides a two-stage dry dust cleaning device and a down-hole drilling machine including the same. The two-stage dry dust cleaning device comprises a dust catching part, a first stage dust cleaning part and a second stage dust cleaning part. The dust catching part, the first stage dust cleaning part and the second stage dust cleaning part are connected with flow guiding pipes sequentially; and a centrifugal exhaust fan with an air outlet is installed on the second stage dust cleaning part. According to the down-hole drilling machine provided with the two-stage dry dust cleaning device, rock dust generated from drilling operation is sequentially sucked into the dust catching part, the first stage dust cleaning part and the second stage dust cleaning part from the drilling positions through the sucking power of the centrifugal exhaust fan, and the rock dust is collected into the first stage dust cleaning part and the second stage dust cleaning part according the sizes of the dust particles; and tilting baffles are arranged on air flow paths in the first stage dust cleaning part and the second stage dust cleaning part, and a filtering element capable of adsorbing the light dust is arranged in the second stage dust cleaning part, so that dust sucking effect is improved, working environment and human health are protected, damage to the centrifugal exhaust fan is reduced, and using quality of the down-hole drilling machine is ensured.

The invention discloses equipment for cleaning a roof of a plastic greenhouse. The equipment comprises a cleaning mechanism and a walking mechanism. The equipment is characterized in that the cleaning mechanism comprises a main frame, spring brushes which are adaptive to the shape of the roof of the greenhouse are installed on the two sides of the main frame, one ends of the spring brushes are driven by a rotating motor, water spray pipes which are perpendicular to the walking track of the equipment for cleaning the roof of the plastic greenhouse is additionally installed on the main frame, the water spray pipes cross over the spring brushes, a hollow suspension is additionally arranged above the spring brushes, the walking mechanism comprises the main frame which is arranged at the middle part, two parallel main wheels are arranged on the main frame, one main wheel is driven by a walking motor, a large synchronizing wheel and a small synchronizing wheel which are connected through a synchronous belt are arranged on one side of the main frame, and a large synchronizing wheel with a synchronous belt is arranged on the other side of the main frame. The equipment can efficiently clean the roof of the plastic greenhouse, the use quality of the plastic greenhouse is guaranteed and the problems that the roof of the plastic greenhouse is difficult and unsafe to clean manually and the like are solved.

The invention discloses an emissivity calibration method for an infrared temperature measurement system, and belongs to the technical field of infrared temperature measurement. According to the present invention, a computer is included, a thermocouple thermodetector is arranged at the input end of the computer, the thermocouple thermodetector comprises a data transmission module, and the input endof the computer is connected with the data transmission module through a wire. By arranging the thermocouple thermometer, the temperature of an object to be measured is accurately measured, the measurement precision is ensured, the measurement range is enlarged, and the use convenience is ensured; the data of the thermocouple thermometer can be compared with the temperature data of the infrared thermometer, so that the emissivity adjustment precision of the infrared thermometer is improved, and the temperature measurement reliability is improved; the calibration convenience is guaranteed, work efficiency is improved, use quality is guaranteed, accuracy and reliability of measurement results are guaranteed, synchronous correction can be conducted in the continuous work process, and measurement errors are prevented.

The invention discloses a device for cleaning a roof ceiling of a glass greenhouse. The device is characterized by comprising a cleaning device, wherein the cleaning device is placed on one side of the roof ceiling of the greenhouse and comprises a main suspension. A hairbrush roller is fixed in front of the main suspension and driven by a cleaning motor to rotate. Spray pipes with spray nozzles are arranged on the front side and the rear side of the hairbrush roller. The front spray pipe has the wetting function, the rear spray pipe has the cleaning function, and the two spray pipes are respectively connected with a water supply pipe. A large walking wheel is fixed at the rear of the main suspension and driven by a walking motor to control the whole cleaning device to walk forwards or backwards. Small auxiliary wheels are fixed at the left end and the right end of the suspension and have the walking auxiliary function. By matching with a water supply mechanism and a power supply mechanism, the device for cleaning the roof ceiling of the glass greenhouse can efficiently clean the roof ceiling of the glass greenhouse, ensures the using quality of the greenhouse, and solves the problem that it is difficult and unsafe to manually clean the roof ceiling of the glass greenhouse.

The invention discloses an anti-raise specialistic floor and a production method thereof. The floor comprises a substrate (1), wherein a finish paint layer (2), a resin layer (3) and a primer layer (4) are sequentially laid above the substrate (1) from top to bottom; a back paint layer (5) is laid below the substrate (1); wood fiber conduits (6) of the substrate (1) are filled with resin (7); the substrate (1) is provided with a tongue-and-groove (8); and the surface of the tongue-and-groove (8) is laid with a wax layer (9). In the production process of the floor, a finished product is obtained through the production steps of: hacking, sanding, back paint coating, resin permeating, primer coating, resin retouching, finish paint coating, tongue-and-groove wax sealing, and the like. The product has excellent characteristics of preventing expansion, contraction and raising. The wood fiber conduits of various surfaces are effectively sealed, which can effectively prevent water from entering and draining to ensure that the floor per se has relatively stable internal environment so as to prevent the solid wood floor from raising, deforming and cracking.

The invention discloses a PVC (polyvinyl chloride) production and decoration special-shaped panel filled with regenerated powder coal ash and wheat straw. A core layer of the PVC special-shaped panel is prepared by taking PVC resin, power coal ash and wheat straw broken powder materials with auxiliary raw materials as filling materials, and the core layer wraps a hard PVC layer so as to form a combined special-shaped panel. The invention also discloses a preparation method of the special-shaped panel prepared from thermoplastic plastics filled with the mixture of wheat straw fibers and powder coal ash. According to the technical scheme provided by the invention, wood material consumption is reduced, and the aims of environment protection and resource conservation are achieved; the special-shaped panel prepared by adopting the preparation method achieves the same using and decoration effects with the special-shaped panel prepared in the prior art.

The invention discloses an automatic enamelled wire continues detection apparatus and a method for detecting a breakdown voltage of an enamelled wire. The detection apparatus comprises a rack; and a container for placing testing liquid for detecting an enamelled wire is arranged at the rack. A paying-off component, a take-up component, and a voltage detection component are arranged at the container. A testing power supply is installed at the voltage detection component; and a one-end electrode of the testing power supply is connected with the testing liquid in the container and a the-other-end electrode of the testing power supply is connected with the take-up component. A to-be-detected enamelled wire winds around the paying-off component; and the end of the to-be-detected enamelled wire is connected with the take-up component. The take-up component drives the to-be-detected enamelled wire to pass through the testing liquid through the paying-off component and to be rolled at the take-up component automatically by a centralized way; and the voltage detection component detects the real-time state of the to-be-detected enamelled wire passing through the testing liquid in real time. Therefore, the breakdown state of the membrane of the enamelled wire can be detected automatically, comprehensively and accurately; the efficiency is high; the detection precision is enhanced; and the using quality of the enamelled wire is ensured.

The invention discloses a waterproof pulverized coal and a preparation method thereof, wherein the waterproof pulverized coal comprises components with parts by weight: calcium salt or calcium hydroxide (Ca(OH)2) 5-30 parts, stearic acid or stearate 1-10 parts or pulverized coal 60-94 parts. The method for preparing the waterproof pulverized coal comprises steps: firstly, the components with parts by weight are weighted, are added into a roller type reaction kettle to be kept to heat for 20-60 min after being heated to 110-140 DEG C, thereby obtaining the waterproof pulverized coal. The method for preparing the waterproof pulverized coal can convert pulverized coal to be a hydrophobic substance from a hydrotropic substance, greatly reduces hydrophilic performance of the pulverized coal, and can prevent volatile components in the pulverized coal from volatilizing, thereby preventing the autoignition problem of the pulverized coal during storing, prolonging service life, improving safety during storage and transportation, and having excellent application prospect.

The invention relates to a determining method of an optimal asphalt dosage of a porous asphalt mixture. The determining method comprises the following steps: (1) determining a predicted asphalt film thickness according to the relationship between 175 DEG C power viscosity of an asphalt binder and an asphalt film thickness; (2) determining a predicted asphalt dosage according to a specific surface area computational formula of mineral aggregate and the predicted asphalt film thickness; (3) with the predicted asphalt dosage as a median and 0.3% or 0.5% as an interval change, forming five groups of asphalt dosages, performing a schellenberg asphalt leakage test and a cantabro dispersion test, and determining the optimal asphalt dosage range with the inflection points of the two curves as boundary; (4) forming five groups of test specimens through a vibration forming method to measure the connected voidage, and then, performing a uniaxial penetration test and an unconfined compressive strength test under a test temperature condition of 60 DEG C, and calculating a cohesive force C, wherein the asphalt dosage corresponding to the peak value of the cohesive force C is used as the optimal asphalt dosage; and (5) verifying the pavement performance. The invention provides a quick, convenient and reliable determining method of optimal asphalt dosage for designing the mixing proportion of porous asphalt mixture.

The invention discloses a garbage treatment box facilitating garbage solid-liquid separation, and belongs to the technical field of garbage treatment boxes. The garbage treatment box comprises a base.A treatment box body is fixedly arranged at the top of the base and comprises a bottom box fixed to the top of the base, and a dewatering and drying part is movably arranged in an inner cavity of a top box. A compression supporting plate mechanism matched with the dewatering and drying part is arranged at the top of an inner cavity of the bottom box, and a cleaning pushing structure matched withthe compression supporting plate mechanism is arranged on the inner wall of the rear side of the bottom box. According to the garbage treatment box, under pressing of a pressing roller, part of liquidin garbage is separated out. Through a driving motor, a rotating wheel, an incomplete tooth section, a rack, a movable column, a stress spring and a rubber corrugated pipe, the pressing roller rollsto achieve uniform compression of the garbage, and residual liquid continues to be compressed out. After compression, through an air blower, a heating element, a telescopic hose, a hollow shell and anozzle, the treatment efficiency and quality are greatly improved, secondary treatment is not needed, and the energy consumption and the cost are reduced.

The invention discloses a method and a device for distributing constituting carrier waves in carrier aggregation. The method comprises the following steps that: a base station acquires use quality information of the constituting carrier waves of user equipment; and the base station allocates the constituting carrier waves to the user equipment according to the acquired use quality information of the constituting carrier waves of the user equipment. The device comprises an acquisition device and an allocator, wherein the acquisition device and the allocator are arranged on the base station; the acquisition device is used for acquiring the use quality information of the constituting carrier waves of the user equipment; and the allocator is used for allocating the constituting carrier waves to the user equipment according to the acquired use quality information of the constituting carrier waves of the user equipment. Due to the adoption of the method and the device, the effectiveness of the utilization of the constituting carrier waves by a user can be ensured.

An automatic test system for testing integrated circuits (ICs) and overall system is composed of a rack, at least one computer for test purpose and arranged in said rack for carrying and testing an IC, at least one automatic connect / disconnect mechanism for plugging the IC to be tested in the testing computer or self-test computer and disconnecting it, and at least one controller for controlling the connection and disconnection of IC and its test process. After the ICs to be tested are plugged in the testing computer, it becomes a complete computer for running application and test programs and performing the test of overall system.

The invention discloses a button type battery, and belongs to the preparation field of a battery. The button type battery comprises a negative electrode cover and a positive electrode cover, wherein a sealing adhesive ring is arranged in the buckling position of the negative electrode cover and the positive electrode cover to form a sealed space between the negative electrode cover and the positive electrode cover; a negative electrode, a diaphragm, a positive electrode and a current collector are arranged in the sealed space; an annular sealed cavity is formed between the side wall of the positive electrode and the inner wall of the positive electrode cover; the sealed cavity is filled with an electrolyte; the button type battery also comprises a supporting cover; the supporting cover comprises a main body which is arranged between the current collector and the positive electrode cover, an annular coating body which is formed by axial upward extension from the outer edge of the main body, and an annular supporting body which is formed by radial outward extension from the upper edge of the coating body; and the outer edge of the supporting body props against the inner wall of the positive electrode cover. By setting the supporting cover, relative displacement among the positive electrode, the current collector and the positive electrode cover can be effectively prevented; and therefore, the overall stability of the button type battery can be improved, the use quality can be ensured, electrolyte leakage can be effectively prevented, and the service life can be prolonged.

The invention provides a rotary tower type detecting, marking and braiding integrated machine. The rotary tower type detecting, marking and braiding integrated machine comprises a workbench, a rotarytower, multiple operating stations and a pressing unit. The rotary tower comprises a rotary disc and suction nozzles evenly arranged on the edge of the rotary disc, wherein the suction nozzles are arranged downwards. The workbench is provided with the multiple operating stations sequentially arranged around the rotary tower, each operating station corresponds to one suction nozzle, the suction nozzles suck products on the operating stations corresponding to the positions below the suction nozzles, and under the effect of the rotary disc, the products move among all the stations. The pressing unit is located over the rotary tower, and comprises a fixed disc. The fixed disc and the rotary disc are oppositely fixed, and the fixed disc is provided with a pressing module for driving the suctionnozzles to move downwards to suck the products. The rotary tower structure is adopted for the rotary tower type detecting, marking and braiding integrated machine, all the operating stations are arranged around the rotary tower mechanism, the structure is compact, the suction nozzles move downwards to suck the products through the pressing module, the sucking speed of electronic products or chipsis increased, and the transfer efficiency is improved.

The invention provides a method and device for providing live broadcast services. The method is applied to a server and comprises the steps of obtaining feature information of each user in a live broadcast room, wherein the feature information of each user includes at least one of a network address of the user and a message sent by the user and identity information of the user; dividing a servicelevel to which each user belongs according to the feature information; and providing corresponding live broadcast services for each user based on the service level. According to the invention, low-level users are provided with fewer services or are refused to be served, thereby playing a role defending attackers on the one hand, and guaranteeing the use quality of high-value users on the other hand.

The invention relates to a corrugated packaging carton manufacturing and forming machine and a manufacturing and forming process. The corrugated packaging carton manufacturing and forming machine comprises a fixed base, a mounting plate, a clamping device, a gluing device and a pressure maintaining plate. The mounting plate is fixed to the right side of the upper end of the fixed base, and the clamping device is mounted in the middle of the mounting plate through a bearing. The gluing device is arranged on the left side of the clamping device, and the pressure maintaining plate is arranged onthe left side of the gluing device and arranged above the fixed base. The manufacturing and forming process can solve the following problems that in a traditional round corrugated carton manufacturingmethod, a cylinder and a bottom support of a corrugated carton need to be manually fixed in position firstly and then glued and connected, the manual fixing effect is poor, defects often occur at thebutt joint position of the cylinder and the bottom support of the round carton, and automatic production is inconvenient; and in the process of producing and preparing the round carton, pressure maintaining treatment is often lacked, so that the stability of the gluing connection position is poor, and the using effect of the round carton can be affected to a certain extent.

The invention discloses an environment-friendly full-automatic harvester. The environment-friendly full-automatic harvester includes a harvester body, the rear end of the harvester body is provided with a ploughing device, a baffle is arranged at the position, located at the upper end of a harvest head, of the front end of the harvester body, the upper end of a manipulation chamber is provided with a solar battery panel, and a small pulse dust remover is arranged at one side of a granary. According to the environment-friendly full-automatic harvester, through the ploughing device, it is convenient to plough the land after harvest, integration of the harvest and ploughing is achieved, and workers' time and labor are saved; through the solar battery panel, a power source can be stored and provided for the manipulation chamber, it is convenient for operators to use the environment-friendly full-automatic harvester at any time, the harvester body is prevented from breaking down, and the situation is prevented that due to the lack of power supply, the workers' operation is influenced; through the small pulse dust remover, it is convenient to treat tail gas generated by the harvester body, and the tail gas generated by the harvester body is prevented from influencing the atmosphere of working environment and damaging the workers' health.

The invention provides a refrigerator door closing device with a free suspension function. The device comprises a hinge component articulated with a refrigerator cabinet body and a refrigerator door body, wherein the hinge component comprises an articulating shaft fixed at the upper end of the refrigerator cabinet body, and a hinge seat fixed at the upper end of the refrigerator door body; a positioning end of the hinge seat is connected with the articulating shaft in a sleeving manner; a swinging end of the hinge seat rotates by taking the articulating shaft as a fixed point; the hinge seat is provided with a cam, a connecting wheel and an elastic component; the articulating shaft is fixedly sleeved with the cam; positioning grooves and arc surfaces are formed and arranged at the outer edge of the cam; the elastic component acts on the connecting wheel in an elastic buffer manner to allow the connecting wheel to be connected with the positioning grooves and the arc surfaces in a sliding manner with the rotation of the hinge seat; the refrigerator door body can be automatically closed; a closing effect is good; the abrasion is reduced under a heavy load condition; the structural stability and reliability are improved; at the same time, the refrigerator door body can be suspended when the refrigerator door body is opened by a certain angle; and the device is high in use flexibility and applicability.

The invention provides a rural land circulation management system based on a block chain technology. The system comprises a data layer, a user layer and an application layer, and is characterized in that the data layer stores user information and plot information as well as circulation information, process node information, process auditing information and historical task information data in a land circulation process based on the block chain technology; the application layer comprises a land information module, a land circulation module, a land circulation information management module, a land circulation supervision module, a land dispute arbitration module, a land circulation data analysis module, a land value evaluation module, a land query module, an electronic map module and a systemmanagement module; and the land circulation supervision module is used for tracking and managing recorded land circulation projects, including land property transaction, data security supervision, and land real-time information uploading and objection.

The invention discloses a new energy automobile vehicle-mounted storage battery anti-vibration mounting box which comprises a box body, a placement box is arranged in the box body, limiting blocks arefixedly mounted at the tops of the two sides of the placement box, fixing blocks are fixedly mounted at the bottoms of the two sides of an inner cavity of the box body, and sliding grooves are formedin the fixing blocks. Sliding blocks are slidably connected into the sliding grooves. The limiting blocks are additionally arranged on the side face of the containing box, stability during downward movement can be guaranteed, inclination in the box body during vibration is avoided, the buffering air bag is additionally arranged at the bottom to buffer downward vibration force, and meanwhile the rubber pad is additionally arranged between the upper pressing block and the lower pressing block to enhance the buffering force between the upper pressing block and the lower pressing block and damagecaused by direct collision is avoided; and through a series of structures, buffer protection with the bottom of the placement box is facilitated, the safety of the internal storage battery during useis enhanced, the storage battery is prevented from being damaged by excessive vibration during running of the automobile, and the use quality is effectively guaranteed.

The invention provides a rotary derusting and cleaning device for a pipeline for a construction site, and belongs to the field of buildings. The rotary derusting and cleaning device comprises a pressurizing water inlet pump, a control switch, a motor, a pipeline clamping and fixing disc, a pipeline, a derusting and cleaning sleeve and a cleaning box; the pipeline clamping and fixing disc is fixedly sleeved with a bearing seat and can rotate in the bearing seat; the pipeline is clamped and fixed to interior of the pipeline clamping and fixing disc; the pressurizing water inlet pump is fixedly arranged on a fixed transverse plate; the cleaning box is welded to the lower end of a water inlet pipe; the derusting and cleaning sleeve is welded to the lower end of the cleaning box; the motor is fixedly arranged at the lower end of a motor fixing support; and the control switch is fixedly arranged on the upper end surface of the right side of the fixed transverse plate. The rotary derusting and cleaning device has the advantages that design is reasonable, rotary derusting and cleaning of the outer wall of the pipeline are realized, the automation degree is high, and the service life and service quality of the pipeline are guaranteed.

A vehicle-mounted wide-angle lens comprises a first lens of a negative focal power, a second lens of a negative focal power, a third lens of a negative focal power, a fourth lens of a positive focal power, a fifth lens of a negative focal power, a sixth lens of a positive focal power and a seventh lens of a positive focal power successively from the object plane to the image plane; an aperture diaphragm is arranged between the fourth and the fifth lenses; protective glass and an optical filter are configured between the seventh lens and the image plane; the image plane is provided with light reception surfaces of solid shooting components as CCD and CMOS; the first, second and third lenses are falcate lenses which bend towards the image plane; the fifth and sixth lenses are combined into a glued lens, and a gluing side of the glued lens bends towards the image plane; the fourth and fifth lenses are glass lenses of high refractive indexes respectively; and the first, second, third, sixth and seventh lenses are glass lenses of low dispersion.

The invention discloses a cleaning device for the roof of a plastic greenhouse. The cleaning device for the roof of the plastic greenhouse comprises a cleaning mechanism and a travelling mechanism, and is characterized in that the cleaning mechanism comprises a shower pipe and a brush roller which are fit with the roof of the greenhouse, one end of the shower pipe is provided with a water pump, the water pump pumps water in a gutter of the greenhouse directly, the front and back parts of the shower pipe are provided with two rows of water spray holes, the brush roller is arranged below the shower pipe, and one end of the brush roller is driven by a brush roller motor; the travelling mechanism comprises synchronous belt wheels at two sides of the greenhouse and auxiliary wheels at the top of the greenhouse, each synchronous belt wheel comprises a synchronous belt and three synchronous wheels, each synchronous belt rotates along the three corresponding synchronous wheels, the first synchronous wheel is driven by a travelling motor, the other two synchronous wheels assist, and the two rows of auxiliary wheels at the top of the greenhouse are arranged below the shower pipe and walk along longitudinal pull rod at the roof. The cleaning device disclosed by the invention is light in weight and walks by self; the roof of the plastic greenhouse can be efficiently cleaned, the use quality of the plastic greenhouse is ensured, and the problems of difficulty and unsafety caused by the fact that the roof of the plastic greenhouse is cleaned manually are solved.