31results about How to "Quick and easy to use" patented technology

A system, method, and computer program product communicate data dictionary information of database objects through a redo stream in the form of metadata, which provides the association between the internal numbers used by a database schema to identify database objects and the corresponding user-defined names of the database objects, in the redo stream itself, so that the association information may be easily and quickly used in the analysis of the redo stream of the database transactions. A method of communicating data dictionary information of database objects through a redo stream comprises the steps of performing a change to a first database data table, logging redo information representing the change to the first database data table to a redo stream, and logging information relating to internal identifier mapping information associated with the first database data table to the redo stream.

A spinning reel has a drag assembly in its spool on one end of the reel body, and an adjustment knob for the drag assembly on another end of the reel body, where it is conveniently accessed during use of the reel. The reel has a handle arm with two slidably disposed handle arm portions, which are releasably secured together at selected positions to provide a variable length handle arm.

The invention discloses a novel cement-based plastering mortar construction method including the steps of construction preparation, base layer treatment, primary wall surface plastering and leveling, spraying of appropriate amount of water on a wall surface, mortar preparation, mortar plastering on a wall, final wall surface plastering and leveling, compacting and troweling. The mortar preparation includes: pouring water into a stirring barrel prior to pouring cement plaster into the stirring barrel according to the ratio of the cement plaster to the water of 1:0.18, and stirring for 2-3 minutes to enable mortar to reach proper thickness. The final wall surface plastering and leveling includes: roughly plastering and leveling one layer of mortar after the mortar is plastered on the wall, and then carefully plastering and leveling the mortar. The novel cement-based plastering mortar construction method has the advantages that mortar bonding strength is high, water resistance is excellent and the like; the method is applied to finish and base layer treatment of wall surfaces in indoor damp water seepage environments, smooth wall surfaces, cement-poured wall surfaces and ceiling plastering surfaces of various high-rise buildings; the finished wall surfaces are prevented from mortar peeling, cracking and shedding after being affected with damp and in the presence of water, the bonding strength of the finished wall surfaces and the base layer are high, and the method is convenient and rapid to use; the finished wall surfaces are smooth, level, non-poisonous and odorless.

The invention discloses a large power transformer direct-current resistance fast testing method used for testing the direct-current resistance of a large power transformer. The magnetomotive force produced by transformer residual magnetism of a winding is utilized, the magnetomotive force is eliminated and utilized in a short-circuit manner, demagnetization is implemented rapidly and simply, the residual magnetism in the same direction with the next measurement is retained, and the charging time for testing the next winding is shortened; when the method is applied to a direct-current resistance testing assistant device, the direct-current resistance can be tested simply and rapidly, the testing time is shortened greatly, and the testing difficulty is lowered greatly.

The invention discloses a convenient-to-carry fire protection winding disc device for fire protection. The convenient-to-carry fire protection winding disc device comprises fixing screws, a metal annular block, a metal winding disc and rubber protectors. When a metal water inflow pipe consisting of an arc-shaped notch, a metal sleeve ring, a metal connecting pipe and a welding fixing ring is fixed, only a rubber connecting hose is required to be inserted into a groove of the metal connecting pipe, and then the metal sleeve ring moves upwards, so that the rubber connecting hose is fixed very well; the rubber protectors consisting of concentric-square-shaped connecting blocks, middle notch grooves and inserting rubber blocks are made of soft materials, so that palms can be prevented from being injured very well when penetrating through the middle notch grooves for extracting and moving by the hands; and a notch fixer consisting of a threaded rotating column, a metal square, a fixing notch and a rubber gasket has a very good fixing effect, and the fixing notch of the notch fixer can fix a rubber hose very well, so that the rubber hose is placed outside very well.

The invention discloses an aluminum alloy formwork trapezoid cross section profile and a unit formwork structure of an aluminum alloy formwork. The aluminum alloy formwork trapezoid cross section profile is an integrally-formed aluminum alloy abnormal-shaped plate and is composed of a groove body and a group of longitudinal reinforcing ribs, wherein the groove is formed by a rectangular panel and two opposite longitudinal side frames on the back face of the panel, and the longitudinal reinforcing ribs are evenly distributed at the bottom of the groove body. The unit formwork structure of the aluminum alloy formwork comprises the aluminum alloy formwork trapezoid cross section profile, transverse side frames, transverse reinforcing ribs and corner reinforcing blocks. The aluminum alloy formwork trapezoid cross section profile and the unit formwork structure of the aluminum alloy formwork, the structure is clear, forming is easy, later-period machining amount of the formwork is small, the machining cost is reduced, it can be ensured that the formwork is low in weight, safe to use and long in service life, the construction efficiency is improved, standardized, systematic and industrial production is easier, formwork assembly and disassembly are fast, easy and convenient, installation is firm and reliable, the construction efficiency is high, and the construction cost is low.

The invention discloses a fallen hair remover which comprises a removing device. The removing device comprises a device shell, a capacitor anode, a capacitor cathode, insulating blocks and a power supply; the upper portion of the removing device is connected with a holding rod, an electrostatic bar is inserted between the insulating blocks, the device shell is provided with a switch which is connected with the anode of the power supply and the capacitor anode, and the cathode of the power supply is connected with the capacitor cathode. According to the fallen hair remover, hair fallen on the ground or other places is adsorbed through the adsorption capacity of static electricity to small items, the cost is low, and arrangement is convenient.

The invention discloses a liquid antirust glove and a preparation method thereof. It is composed of casein, latex, glycerin, triethanolamine, ethanol, distilled water, and dibutyl phthalate; In the kettle, add distilled water with 90% formula dosage, heat the water bath to 70°C in advance, and keep stirring for 1-1.5 hours. During the stirring process, add the remaining distilled water to fully expand the casein; then add triethanolamine and stir to make the reaction The material in the kettle becomes glue liquid; then slowly add glycerin and dibutyl phthalate and keep stirring; finally add the mixed solution of ethanol and latex solution, fully stir until mixed evenly, and the product is ready; the formula of the present invention is simple and easy to prepare , quick and easy to use, it has created great convenience for the processing of mechanical parts, and at the same time, it has brought an effective insulating layer for people who are often exposed to organic solvents, and has made contributions to people's health.

A mobile communication support system for individual hand-held digital assist device comprises center server and wireless network base station. The center server connects to wireless network base station by network and connects to database with application program for individual hand-held digital assist device; the wireless network base station receives signal from individual hand-held digital assist device, converses the protocol and sends to center server; the center server transmit application program data to base station by network, take protocol conversion for the application program data, transmit to individual hand-held digital assist device, then run the data. The invention connects wireless network base stations with different wireless protocol to a center server, makes different individual hand-held digital assist device can communicate to center server; then realizes all support service currently of individual hand-held digital assist device by only one platform.

The invention provides a pin shaft loading and unloading machine and relates to the field of the mechanical manufacturing technology of the pin shaft loading and unloading machine. The pin shaft loading and unloading machine comprises a rack, idler wheels, a hinged-shaft type hydraulic cylinder and two groups of tension bars. Shaft holes are respectively formed in the left sidewall and the right sidewall of the rack. Hinged shafts on two sides of the hinged-shaft type hydraulic cylinder are respectively arranged in the corresponding shaft holes in a penetrating mode. The outer side of the left sidewall of the rack and the outer side of the right sidewall of the rack are respectively connected with a hanging rack through nuts. First through holes corresponding to the hinged shafts are respectively arranged in the lower ends of the hanging rack. Second through holes are respectively formed in the tail ends of the two groups of tension bars. The hinged shafts are respectively arranged in the first through holes and the second through holes in a penetrating mode in sequence. The two groups of tension bars are respectively fastened with the corresponding hanging racks through nuts. An angle regulation stem is arranged at the tail end of the hinged-shaft type hydraulic cylinder. A free end of the angle regulation stem is connected with a pin shaft placing platform through a nut. A cylindrical bearing body is arranged at the front end of a piston rod of the hinged-shaft type hydraulic cylinder. A pin shaft guide groove is arranged in a free end of the cylindrical bearing body. The pin shaft loading and unloading machine is small in size, light in weight, flexible in movement, convenient to use, high in efficiency, timesaving and laborsaving.

The object of the invention is a method for defining elastic deformations and integral angle between of the most important parts of a gyratory compactor, in which method the angle of gyration of a gyratory compactor is measured during the use of the gyratory compactor. The object of the invention is also a device in accordance with the claim 1, which device includes measuring elements (13, 20, 27, 28) for measuring the angle of gyration of a gyratory compactor. Characteristic to the method in accordance with the invention is the fact that a loading device (1) is adjusted in the place of mass specimen, the loading of which on the gyratory compactor is earlier known and that the gyratory compactor will be in use while the loading device (1) is inside the gyratory compactor. Characteristic to the device in accordance with the invention is the fact that the device includes at least one loading device which can be placed inside the specimen cylinder mold of the gyratory compactor.

The invention discloses an assembly type buoy-powered mast-combined crane device. The device comprises a float system, a hoisting system and a mast amplitude variation system, wherein a supporting platform is anchored on the float system, and the hoisting system and the mast amplitude variation system are arranged on the supporting platform; the mast amplitude variation system comprises an amplitude variation winch, first masts, second masts, third masts and an amplitude variation steel wire rope, the first masts, the second masts and the third masts are sequentially hinged, a steel box is fixedly connected between upper ends of the two third masts, and the amplitude variation winch is connected with the upper ends of the third masts through the amplitude variation steel wire rope; the hoisting system comprises a hoisting winch, a hoisting steel wire rope and a hook, and the hoisting winch controls the hoisting steel wire rope to pull a heavy object. The whole device is supported by the float system, a proper hoisting point can be found through the mast amplitude variation system, and finally, the heavy object is hoisted by the hoisting system; the device has the advantages that the device is simple to assemble and fast and convenient to use, and the construction cost can be saved.

The invention discloses a large-scale MIMO low-complexity hybrid precoding method and system, and belongs to the technical field of wireless communication precoding, and the method comprises the steps: carrying out the initialization of related parameters, and completing the design process of hybrid precoding through an extended power iteration method; and obtaining a pre-coding matrix by using an EPI algorithm, and generating a signal to be sent. The parameter initialization comprises setting the number MN of transmitting antennas, the number K of user antennas and a channel transmission matrix H; first N maximum singular values and feature vectors of the channel matrix are acquired by using an EPI algorithm; a hybrid precoding matrix is obtained by using the feature vector; and finally, a to-be-sent signal is generated by using the hybrid precoding matrix, and the transmission rate and the operation complexity of the hybrid precoding are calculated and compared. Compared with a theoretical value, the method has the advantages of faster convergence, lower complexity and lower cost.

The invention belongs to the field of metal antirust, and is a metal antirust paper, which is composed of the following raw materials in parts by weight: benzotriazole 4-8, ethanol 35-40, dibutyl adipate 10-15, tetraethylene Pentaamine 30-35, triethanolamine 5-8, calcium petroleum sulfonate in appropriate amount; when preparing, mix and stir the above materials evenly to make anti-rust liquid, coat it on the front of neutral paper, and then The back is coated with a moisture-proof agent. When in use, the front of the paper should be in contact with the metal, and the back of the paper should be in contact with the atmosphere; Copper, aluminum, anodized, cadmium-plated, galvanized, etc. all have good anti-embroidery effects.

The invention relates to the field of medical instrument disinfection, in particular to disinfection equipment for the internal medicine department, which comprises a disinfection frame, a sealing insertion plate groove, a sealing adding end cover, an inner storage partition plate, a disinfection adding frame, an extrusion adding plate, two extension top plates, an extrusion spring shaft and a one-way valve communicating pipe; the sealing insertion plate groove is formed in an inner end plate of the disinfection frame; the sealing adding end cover is connected to the disinfection frame in a matched mode through sealing threads; the inner storage partition plate is fixedly connected into the disinfection frame; a storage area is formed between the inner storage partition plate and the disinfection frame; the disinfection adding frame is fixedly connected to an inner end plate on the inner wall of the disinfection frame; and the two extension top plates are evenly and fixedly connected into the extrusion adding plate. The disinfection equipment disclosed by the invention has the beneficial effects that: medical instruments needing to be continuously disinfected and stored can be rapidly and conveniently stored, disinfected and used; and the device to be disinfected and stored can be conveniently, quickly and effectively stored, disinfected and taken out for use independently.

The invention discloses an automobile part rapid cutting-off machine. The machine comprises a cutting-off machine main body, a working table and a cutting-off device; the working table is arranged onthe upper side of the cutting-off machine main body and is fixedly connected with the cutting-off machine main body, the cutting-off device is arranged inside the cutting-off machine main body and isembedded in the cutting-off machine main body, and a motor is arranged on the left side of the cutting-off machine main body and is connected with the cutting-off machine main body in an embedding mode. According to the machine, a movable cutter can move left and right and up and down through a movable guide rail so that the cut-off position of a part can be more accurate and can not generate flaws, the rotary cutter is arranged so that the cutting speed can be higher, the efficiency can be higher, the automobile part can be cut off, the parts of other materials can also be cut off, the multipurpose performance of the machine is embodied, and a cooling device is further arranged in the cutting-off device so that cooling and dust clearing can be carried out on the cut part under the controlof an electromagnetic valve.

The invention discloses a multifunctional turntable for fire fighting, escape, unblocking and flushing. The multifunctional turntable includes a turntable, a fire hose, a slow descender, a window sill guide wheel, a direct current spray gun, and a water inlet hose. , a water inlet ball valve and a base for supporting the entire multifunctional turntable, wherein a rotating shaft is arranged in the middle of the rotating disc, and the rotating disc hanger is connected to the rotating disc hanger through the rotating shaft, and the other end of the rotating disc hanger is connected to the base with a bolt, The rotating disk is provided with an accommodating groove, and a hose is wound on the accommodating groove. The hose is wound at the starting point of the rotating disk, and a clamping safety bolt is provided to prevent the hose from falling off. The hose adopts a straight The plug-in quick connection is connected with the rotating disk, and the outlet end of the hose is provided with a direct current spray gun, which can be detachably connected to random related accessories. It can unblock, spray and rinse.

The invention discloses a gear ring and flywheel thermocompression bonding device, and relates to the technical field of thermocompression bonding processing equipment. The device includes a circular base; six vertical supporting shaft rods are welded to the top end of the circular base in a surrounding mode, where a force transmission piece is slidably installed on the vertical supporting shaft rod in the middle of the rear side, and a horizontal installation ring is welded to the top ends of the six vertical supporting shaft rods in a supporting mode. Six horizontal supporting rods are welded to the interior of the horizontal mounting ring in an annular array mode, a tray is welded and fixed to the centers of the six horizontal supporting rods and used for supporting and placing a flywheel, and a positioning lantern ring is welded and supported to the upper portion of the top end of the horizontal mounting ring and used for surrounding and sleeving a limiting gear ring; a vertical supporting frame is further welded to the top end of the circular base. According to the positioning lantern ring, the gear ring inserting fence can be kept in the horizontal state through the four clamping jaws in the positioning lantern ring, and the problems that the gear ring cannot be in horizontal butt joint with the outer ring of the flywheel, deflection is likely to happen in the press-fit machining process, and the machining quality is affected are solved.

The invention relates to a road vehicle driving safety indicator device, and in particular a road induction lamp of an arbitrary combination and multiple positioning mode. The road induction lamp comprises an outer part fixed shell, the front side face and the rear side face of the shell are flat surfaces, the left side face and the right side face are streamline arc-shape curvature surfaces; flash lamps and light reflecting stripes are respectively arranged on the front side face and the rear side face of the shell; a casing pipe is fixed on the vertical direction of the inner part of the shell, a control circuit board and a power source are arranged inside a cavity between the casing pipe and the shell; a support pipe is connected in a sleeved mode in the casing pipe; the induction lamps are arranged in multiple units on the support pipe; and wire drawing end caps which can be interlinked and combined are arranged on the upper end and the lower end of the shell of each induction lamp. The present scheme is flexible and varied, and can be arbitrarily combined on multilevel according to the site conditions or user requirements; the area and the height of the indicator lamp can be added to achieve the best indicator effect, and the device has the functions of automatic giving alarms and maintenance keeping.

The invention provides a critical care cart with classified storage and cross infection prevention, and relates to the technical field of medical instruments, the critical care cart comprises a cart body, the right side of the cart body is provided with a mounting box; two garbage storage buckets are arranged in the mounting box, and recycling bags are arranged in the garbage storage buckets; and two butt joint grooves are formed in the mounting box. According to the medical instrument cleaning device, medical instruments are cleaned in an up-and-down vibration mode of the disinfection box, and the trouble of manual disinfection and cleaning can be omitted; the opening action of the rotating cover and the drainage action of the liquid leakage plate are combined together for one time through mechanical transmission, the trouble of step-by-step operation is omitted, disinfectant is reasonably utilized, consumption is reduced, waste is avoided, and the problems that medical instruments need to be manually collected for cleaning, a large amount of disinfectant liquid is used, and the cleaning efficiency is high are solved. The problems that in the prior art, medical waste collection and disinfection need to be carried out step by step in a matched mode, the use efficiency of equipment is poor, medical waste in a recovery bag can generate pungent smell, and treatment is troublesome are solved.

The invention provides a condom with a ring. The ring is arranged on the circumference surface of a condom body of the condom and contained in a condom body circumference surface film. The cross section of the ring can be a circle or an ellipse or a semicircle or a rectangle with transition corners. The ring is contained in the film wall of the condom body, and the thickness of the ring should be two times that of the film wall of the condom body or larger. As the ring is contained in the condom body film, the ring is not likely to fall, stress concentration to the ring is avoided, manufacturing reliability is improved, the rate of finished products is increased, the condom will not be damaged in the storage or use process, and safety is improved. The condom can be used or put on more rapidly, more conveniently and more smoothly without causing the hard or unsmooth feeling; in the process of making contact with the human body, the ring can touch the human body more smoothly with higher waviness without causing the hard or unsmooth feeling.

The invention relates to a self-floating positioning alarm. The self-floating positioning alarm comprises a sphere self-floating alarm and an underwater unpowered automatic starting device. An emission antenna is arranged on the top end of the sphere self-floating alarm. The sphere self-floating alarm is internally provided with a positioning instrument and a rechargeable storage battery, and other space in the sphere is filled with lightweight concrete. The bottom part of the sphere self-floating alarm is provided with an anchoring ring connected with an anchoring rope, and the anchoring rope is fixedly connected with a carrier. The underwater unpowered automatic starting device comprises an air pressure power device hinged to the carrier and a fixing frame used for clamping the sphere self-floating alarm. The fixing frame comprises a fixing seat fixed to the carrier and a swinging rod hinged to the carrier. The air pressure power device is in stressed connection with the swinging rod through a spring. According to the invention, the structure is reasonable, the self-floating positioning alarm can be installed on carriers such as an aircraft, a ship and a vehicle on land, and when the self-floating positioning alarm falls into water, the heatproof and high-temperature-resistant sphere self-floating alarm is automatically started and released and automatically surfaces; in addition, the satellite positioning instrument accurately provides the position thereof, and the anchoring rope is tied with the carries, so that the carrier can be rapidly found.

The invention belongs to the technical field of computer hardware, and provides a case with pepper spray. The case with the pepper spray comprises the case, wherein a pepper spray sprayer is arranged in the case; the inner rear end of the case is provided with a cavity integrated with the case; the pepper spray sprayer is arranged in the cavity; the opening of the cavity is provided with a chute; a sliding cover is arranged in the chute; and the front part of the sliding cover is provided with a handle. The scheme realizes a purpose that the case has a defense function and can perform a self-protection function under extraordinary circumstances. The preferable built-in cavity, sliding protection cover and handle on the sliding protection cover can cause a self-protection device to be better hidden and unlike to be found. The case is convenient and quick in use and place.

The invention relates to the field of metal adhesives and provides a metal adhesive with high heat resistance. The metal adhesive is composed of the following raw materials in parts by weight: 10-20 parts of neoprene, 50-90 parts of methyl ethyl ketone, 0.1-0.8 part of magnesium oxide, 0.1-0.8 part of acetaldehyde, 0.05-0.1 part of activated zinc oxide, 0.3-0.8 part of an antioxidant, 5-8 parts of rosin modified phenolic resin and 0.3-0.8 part of a crosslinking agent; during preparation, neoprene, magnesium oxide and activated zinc oxide are kneaded uniformly, then the mixture is dissolved in the methyl ethyl ketone, acetaldehyde reflux is carried out for 4 h, rosin modified phenolic resin and the antioxidant are mixed uniformly, and the obtained mixture is uniformly mixed with the crosslinking agent, so that the metal adhesive is obtained. The metal adhesive is simple in formula, convenient to prepare and used rapidly, creates great convenience to processing of metal products, and greatly improves the production efficiency of the metal products, thereby being worthy of wide popularization.

The invention provides a pitch control mechanism for a steel bar thread processing machine, which relates to the technical field of steel bar joint processing. A bottom plate is arranged on the rear side of the top of the workbench, and a first limit frame and a second limit frame are arranged on the left side of the bottom plate. In the present invention, the limit strut passes through the first limit frame, and the support block is limited by the block, so as to buffer the inertia of the backward movement of the processing head, and effectively avoid the processing head due to inertial displacement. The thread processing distance produces errors; through mechanical transmission, the clamping action of the steel bar and the adjustment and processing action of the processing head position are linked together in sequence and performed at one time, which saves the trouble of step-by-step operation and solves the problem of manual pushing to drive the steel bar. The thread distance adjustment is cumbersome and labor-intensive. At the same time, after the steel bar is processed, it needs to be manually pushed and unloaded, which increases the labor intensity of workers.

The invention discloses a split type millimeter wave connector matched with a minimal pin; the split type millimeter wave connector comprises a split type housing and a combined casing arranged in the housing; the combined casing comprises an inner liner, mutually and fixedly connected the pin and an insulator both arranged in the inner liner, and an outer liner configured outside the inner liner. The split type connector is used to separate the housing and the combined casing of the connector, so connector damages caused by blind plugging can be reduced; when the inner combined casing is broken, the housing can still be used, thereby reducing mounting difficulty and the operation personnel, and the housing can be used in multi times, and material is saved.

The invention discloses a ground wire anti-corrosion installation structure for a low-voltage power distribution cabinet, and the structure comprises a cabinet body, an accommodation box is installedin the inner wall of the cabinet body, an operation box is fixed on the outer wall of the accommodation box, a fixed column is fixedly installed on the inner wall of the cabinet body, and the bottom end of an operation rod passes through the bottom wall of the operation box and extends to an operation panel. The operation panel is horizontally distributed and vertically corresponds to installationholes, threads arranged on the outer edge of the operation panel are matched with threads arranged on the inner walls of the installation holes, and meanwhile the installation holes are formed in thelower end face of the operation box. According to the ground wire anti-corrosion installation structure for the low-voltage power distribution cabinet, structures such as the accommodating box are used for sealing and protecting connection of a jumper wire and the cabinet body, and the installation structure formed by structures such as a clamping rod and a push rod is used, so that a joint can be conveniently mounted under the conditions of not using other tools and avoiding direct contact between a palm and the joint; the structural design is very reasonable, and use is faster and more convenient.

The invention discloses an extruding stamping die installing vehicle. The extruding stamping die installing vehicle comprises a bottom frame and a top frame, and base plates are symmetrically and fixedly arranged on the two sides of the top frame; a bearing plate is fixedly arranged on each base plate, and a left limiting plate and a right limiting plate are arranged at the two ends of each bearing plate correspondingly; supporting plates I capable of synchronously moving are arranged in grooves in the two sides of each bearing plate, and rollers which are capable of rotating on the top surfaces of the supporting plates I are arranged between the supporting plates I at intervals; supporting plates II are oppositely arranged between the bearing plates, and top columns which are capable of rotating freely are arranged between the supporting plates II; and racks are fixedly arranged on the supporting plates I, and gears which are engaged with the racks are arranged at the two ends of the racks. According to the extruding stamping die installing vehicle, quick installing and disassembling for a die on one side face of a platform can be realized, the structure is compact, manufacturing, using and maintaining are convenient, not only can disassembling and installing time of the die be shortened greatly, production efficiency can be improved, but also the labor intensity of die disassembling and installing can be reduced greatly, and safety accidents are avoided effectively.

The invention relates to the technical field of mining transmission equipment, in particular to a mining belt conveyor with high safety performance, and aims at solving the technical problems that anexisting mining belt conveyor is poor in safety performance, a belt is prone to vibration dislocation and separation from equipment in the downhill process, and the belt conveyor is complex in layingoperation, high in difficulty, and poor in efficiency. In order to solve the technical problems, the invention provides the mining belt conveyor with high safety performance. The mining belt conveyorcomprises a transmission device, a positioning device and a protection device. The downward pressing and pricking of cross-shaped pins are realized through the outward turning action of transmission arms on the left side and the right side, and during downhill laying, the cross-shaped pins are further inserted into the ground of a roadway due to upward lifting of the belt, so that belt deviation caused by equipment transportation vibration is avoided, the distance between belt rollers and a bottom plate can be adjusted, the laying, folding and stacking of uneven uphill and downhill sections ofthe roadway are facilitated, and the carrying, transportation and storage are facilitated.