539 results about "Screed" patented technology

A method is provided for adjusting a temperature of a screed plate of a paving screed of a road paver, wherein the paving screed comprises a heating element for heating the screed plate. The method may include measuring temperature of the screed plate over a time interval using a temperature sensor, and adjusting a target temperature of the heating element, depending on a time profile of the temperature of the screed plate, using a control unit of the road paver.

An adjustable screed board includes an outer member elongated along a longitudinal axis of the adjustable screed board. The outer member includes a leveling surface. The adjustable screed board also includes an inner member elongated along the longitudinal axis and coupled to the outer member for sliding movement, relative to the outer member, along the longitudinal axis. The inner member includes a leveling surface configured to remain flush with the leveling surface of the outer member during relative sliding movement of the inner and outer members. The leveling surfaces of the inner and outer members are oriented to cooperatively define a bottommost edge of the adjustable screed board along a working length.

The utility model relates to the technical field of heat preservation buildings, and provides an integrated energy-saving heat preservation building structure which comprises a non-dismantling formwork body, heat preservation nails penetrating through the non-dismantling formwork body are movably connected to one side of the non-dismantling formwork body at equal intervals, and a plastering mortar layer is fixedly connected to one side of the non-dismantling formwork body. One side of the plastering mortar layer is fixedly connected with a reinforcing frame, one side of the reinforcing frame is fixedly connected with a decorative face, one end of the non-dismantling formwork body is fixedly connected with a clamping plate, and the other end of the non-dismantling formwork body is provided with a clamping groove. The clamping plates slide in the clamping grooves, elastic deformation of the elastic pieces is utilized, the elastic pieces are made to be tightly attached to one sides of the clamping plates, then the fastening performance of sliding clamping of the clamping plates and the interiors of the reserved grooves is improved, quick and firm splicing and assembling between the non-dismantling formwork bodies are achieved, follow-up corresponding construction operation is facilitated, and the practicability of the non-dismantling formwork bodies is improved.

The invention provides a construction control system, method and equipment of an underwater leveling machine and the underwater leveling machine, and relates to the technical field of ocean engineering. The construction control system comprises a sensing subsystem used for obtaining the weight of stone in a hopper of the underwater leveling machine and the inclination angle of the hopper; the calculation subsystem is used for determining the stone mass based on the weight of the stone in the hopper and the inclination angle of the hopper and calculating the real-time material distribution mass flow rate based on the time sequence data of the stone mass; the current terrain elevation of the foundation bed is obtained to calculate the terrain residual error and the to-be-laid volume; and the control subsystem is used for generating a cloth control instruction through an optimization decision algorithm based on the real-time cloth mass flow rate, the terrain residual error, the to-be-laid volume and the predicted thickness distribution. According to the system, real-time working condition monitoring, dynamic flow calculation, terrain deviation analysis and predictive control strategies can be combined, closed-loop accurate control over the whole process from material conveying to bottom bed forming is achieved, and the control precision of underwater leveling construction is improved.

The invention relates to the technical field of concrete construction, in particular to a green low-carbon concrete construction operation device which comprises a vehicle body, a stirring tank is fixedly mounted on one side of the upper end of the vehicle body, a feeding cylinder is fixedly mounted on one side of the upper end of the stirring tank, and a feeding hopper is fixedly mounted at the upper end of the feeding cylinder. A first motor is started to drive a crushing roller and a rotating roller to rotate, the crushing roller crushes stones, the crushed stones fall at the upper end of an inclined plate, the rotating roller evenly throws the crushed stones to the upper end of a sieve plate, the stones are filtered, and the matched stone fragments fall into a stirring tank and are mixed with additives such as cement and sand to form concrete. Then a valve on the discharging pipe is opened, the vehicle body is pulled towards the concrete outlet side, the pressing cylinder rotates while moving up and down on the concrete, the surface of the concrete is vibrated to be flat, the concrete surface is leveled through the patter and the leveling plate, secondary leveling of workers is not needed, the labor intensity is reduced, and the efficiency is improved.

The invention belongs to the technical field of wallboard heat preservation, and particularly relates to an overhead floor slab heat preservation structure and a construction method thereof.The overhead floor slab heat preservation structure comprises a building wall and a heat preservation plate installed on the surface of the building wall, and the heat preservation plate is installed on the outer surface of the building wall in a pasted mode through a first mortar layer smeared on the surface; the bottoms of the heat preservation plates are inserted into the keels, the outer surfaces of the heat preservation plates are coated with outer mortar layers, net plates are arranged in the outer mortar layers in an interlayer mode, reinforcing pieces are arranged in four corner groove integration spaces at the splicing positions of the four adjacent heat preservation plates, and sleeves are movably inserted into the splicing positions of the four adjacent heat preservation plates. A groove rod is connected between the two reinforcing plates located in the same vertical line direction. According to the overhead floor heat preservation structure and the construction method thereof, the strength of the heat preservation plates can be improved, stripping and falling of one or more heat preservation plates can be avoided, the stability of the overall structure of an outer wall with the heat preservation plates is improved, and meanwhile wall skin of an outer heat preservation wall plate can be prevented from being stripped.

The invention provides a basement large plate structure steel plate overlapping reinforcing structure and a construction method, and relates to the field of structural engineering.The basement large plate structure steel plate overlapping reinforcing structure comprises a large plate structure plate reinforcing structure which is connected to the lower portion of an original concrete plate and located in a large plate structure plate reinforcing area. The large plate structure plate reinforcing structure comprises a prefabricated newly-added concrete structure which is prefabricated and poured on the upper portion of a reinforcing steel plate, and a notch is reserved in the upper end of the prefabricated newly-added concrete structure; the reinforcing steel plate is arranged on the lower portion of the prefabricated newly-added concrete structure, and interface connection between the reinforcing steel plate and the prefabricated newly-added concrete structure is further achieved through the shear connector. The connecting steel bars are arranged on the reinforcing steel plates; the mortar layer is arranged on the upper surface of the convex part of the prefabricated newly-added concrete structure; the cast-in-place newly-added concrete is arranged at the notch; and the tensile steel bars are partially embedded in the original concrete slab and are partially embedded in the cast-in-place newly-added concrete. The original large plate structure can be reinforced conveniently, quickly, economically and reasonably, the bearing capacity of the structure is improved, and the durability of the structure is enhanced.

A slipform paver includes a slipform mold having a mold width extending transverse to a paving direction. At least one leveling beam is supported behind the slipform mould for engaging an upper surface of the formed unhardened concrete structure to level the upper surface, the at least one leveling beam being configured to oscillate transversely to the paving direction. At least one forward speed sensor is configured to provide a forward speed signal corresponding to a forward speed of the slipform paver in the paving direction. The controller is configured to receive the forward speed signal and generate a command signal to control the lateral oscillation frequencies of the at least one leveling beam such that a constant relationship is maintained between the forward speed lateral oscillation frequencies.

Machines, systems, and methods for pre-heating a screed plate (including maintaining the pre-heated screed plate) of a paving machine can comprise a screed assembly including the screed plate; and a thermal cover removably coupleable to or over a bottom working surface of the screed plate. The thermal cover can be movable between a first position where the thermal cover does not cover any portion of the bottom working surface of the screed plate and a second position where the thermal cover covers at least a portion of the bottom working surface of the screed plate.

The invention provides a waterproof connecting structure of an anti-floating anchor rod node, and belongs to the technical field of anti-floating anchor rod construction of constructional engineering. The structure comprises an anti-floating anchor rod, a waterproof connecting assembly, a polymer cement waterproof mortar layer and a fine aggregate concrete protection layer. The lower end of the anti-floating anchor rod is anchored in the concrete anchoring body of the basement structure layer, and the upper end penetrates through the anchoring plate through hole; the waterproof connecting assembly is composed of an anchoring plate and a pre-buried support, the lower end of the pre-buried support is pre-buried in the concrete anchoring body, and the anchoring plate is fixed between the supports. The concrete cushion layer and the anchoring body are sealed through polyurethane sealant, and a waterproof mortar layer, a self-adhesion waterproof roll and a reinforced fine aggregate concrete protection layer are sequentially laid on the concrete cushion layer and the anchoring body to form a totally-closed waterproof system. Through the design of multi-layer collaborative protection and the rigid support, the problems that a traditional joint is prone to leakage, and an anchoring plate displaces are solved, the horizontal displacement resisting capacity is improved, the construction efficiency is improved, and the structure is suitable for anti-floating projects such as basements and basement and has high waterproofness, structural stability and economical efficiency.

The invention discloses a fabricated ultra-low-energy-consumption overhanging type closed balcony system and a construction method thereof. The construction method comprises the following steps that firstly, a prefabricated bottom plate is constructed; and secondly, first joint bars and second joint bars are arranged in the vertical hole channels of the prefabricated bottom plate. And step 3, surveying and setting out. And 4, the outer hanging plate and the side hanging plate are installed. Fifthly, second horizontal plugging materials are arranged on the inner sides of the tops of the transverse prefabricated plates and the longitudinal prefabricated plates, and the inner sides of the second horizontal plugging materials are filled with second waterproof mortar layers; second horizontal sealing rods are arranged on the outer sides of the tops of the transverse prefabricated plates and the longitudinal prefabricated plates. And sixthly, an upper-layer prefabricated bottom plate is installed. And seventhly, the second step to the sixth step are repeated till construction of the upper-layer prefabricated bottom plate on the top of the topmost balcony is completed, and grouting materials are poured into the vertical hole channels in the top of the topmost balcony till construction is completed. According to the method, the technical problems that many problems still exist in traditional closed balcony type selection, material selection, installation and connection, air tightness treatment and the like, the construction progress is slow, and a mature practice system is lacked are solved.

The invention relates to the technical field of building materials, and particularly discloses ultra-high performance concrete containing coarse aggregate, a preparation method of the ultra-high performance concrete and a method for testing the abrasion resistance of the ultra-high performance concrete, the ultra-high performance concrete containing the coarse aggregate comprises cement, a mineral admixture, fine aggregate, steel fiber, the coarse aggregate, an additive and water, and the coarse aggregate is pretreated through cationic emulsified asphalt. The coarse aggregate ultra-high performance concrete is subjected to molding preparation, demolding maintenance, vacuum water saturation and other processes to obtain an original test piece for testing the abrasion resistance, two sub test pieces are obtained after radial cutting, and the mass of the test pieces before and after abrasion is weighed to obtain the abrasion resistance strength. According to the testing method, the abrasion resistance of the surface mortar layer and the abrasion resistance of the internal aggregate layer in the same test piece can be compared, and the abrasion resistance of the ultra-high performance concrete containing the coarse aggregate can be evaluated more comprehensively and objectively. The coarse-aggregate ultra-high-performance concrete has excellent mechanical properties, the abrasion resistance is enhanced, the use amount of a cementing material can be effectively reduced, and the production cost is reduced.

The present invention relates to a rotating device for integration in a substrate, preferably in a building floor element, more particularly in a screed floor, having at least three support units, which can be arranged individually in the circumference of the substrate within a circular area about an axis of rotation, a rotating plate which extends at least over the circular area and has a room side and a bearing side opposite the room side, a rotary bearing unit, and at least one drive apparatus, wherein the rotating plate is rotatably mounted in the axis of rotation and the at least three support units support the rotating plate in a rotationally movable manner in the orientation of the axis of rotation in a vertical axis on the bearing side, and wherein the drive apparatus is configured to set the rotating plate in rotation about the axis of rotation.

The invention provides a parameterization construction method of a recycled concrete three-dimensional mesoscopic numerical model. The parameterization construction method comprises the following steps: 1) calculating the particle number and the particle size of recycled concrete aggregate and the thickness of an old mortar layer; 2) constructing a geometric model of the recycled concrete three-dimensional random spherical aggregate test piece; (3) constructing a geometric model of the recycled concrete three-dimensional random convex polyhedral aggregate test piece; (4) carrying out unstructured grid division; and 5) construction of a recycled concrete projection network model. According to the method, the problem that the geometric space structure of the recycled concrete is complex is solved, and the established geometric model can truly reflect the actual grading, content and shape of the aggregate in the recycled concrete; according to the unstructured mesh generation method aligned with the interface, the problems that mesh generation is difficult, and modeling is difficult due to the fact that an interface transition area is too thin are solved, and the generated mesh model has extremely high unit quality.

The utility model discloses a water stop structure suitable for an upper gate room of a high gate with a deep and thick covering layer in the technical field of engineering water stop, which comprises a plurality of gate plates, a structural seam is arranged between two adjacent gate plates, the structural seam is communicated with a water stop cavity, and a water stop device is filled in the water stop cavity. The water stop device comprises a first mortar layer, a flexible filler layer and a second mortar layer which are sequentially filled in the structural joint from top to bottom, a copper sheet water stop assembly and a water stop belt assembly are arranged on the flexible filler layer in a penetrating mode at intervals, the overall structure is large in flexibility effect, the function of adapting to large uneven deformation between adjacent gate sections can be achieved, damage is not prone to occurring, and the service life of the water stop device is prolonged. Therefore, safe operation of the water gate structure is guaranteed.

The utility model relates to the technical field of house repairing, in particular to a waterproof layer structure for repairing an old house, which comprises a base surface layer and a concrete mortar layer, and a waterproof layer is arranged between the base surface layer and the concrete mortar layer. The waterproof layer comprises a cement-based permeable crystallization self-healing coating layer, an asphalt waterproof coating layer is arranged on the cement-based permeable crystallization self-healing coating layer, and a gridding cloth layer is arranged on the asphalt waterproof coating layer. The utility model has the characteristics that the structure is simpler and more reasonable, blistering and peeling can be better avoided, the waterproof effect can be improved, and moisture overflow can be avoided.

The invention provides an asphalt concrete paver, and relates to the technical field of pavers. The paver comprises a vehicle body, a first driving mechanism, a paving mechanism, a first connecting mechanism and a discharging mechanism, the vehicle body comprises a hopper. The first driving mechanism comprises a supporting frame and a driving lead screw which is arranged in the supporting frame in a penetrating mode and driven by a first motor to rotate. The paving mechanism comprises an ironing plate connected with the driving screw rod; the first connecting mechanism comprises a connecting plate connected to a rod body of the driving screw rod, and the other end of the connecting plate is connected with the ironing plate; the discharging mechanism is arranged at the bottom of the car hopper and comprises a first rotating shaft and a plurality of blades, the first rotating shaft penetrates through the discharging channel in the direction perpendicular to the bottom of the car hopper, the blades surround the first rotating shaft and are located in the discharging channel, and one end of the first rotating shaft is connected with the driving lead screw through a linkage structure; and the driving screw rod is used for driving the ironing plate to move and driving the first rotating shaft to rotate through self rotation, so that the paving uniformity and the discharging speed uniformity can be synchronously improved.

A road finishing machine comprises a screed for producing a paving layer from a paving material, a material bunker for receiving the paving material, a longitudinal conveying device configured to transport the paving material from the material bunker toward the screed, and a transverse distributor auger configured to distribute the paving material transported by the longitudinal conveying device transversely in front of the screed. The transverse distributor auger is mounted in front of a screed basic body of the screed within a transverse distributor channel, which is formed at least in sections by channel plates supported at a chassis of the road finishing machine, and by pre-scrapers attached laterally of a screed basic body of the screed. The road finishing machine further includes at least one suction device with at least one intake line which is configured to suck off aerosols forming during the transverse distribution of the paving material.

The utility model relates to a fabricated wall structure, which belongs to the technical field of prefabricated walls and comprises an ALC (autoclaved lightweight concrete) light partition batten, a door, a door side plate, a door lintel plate, a U-shaped clamp and a structural beam / plate. The ALC light partition wall battens are mutually spliced, the door edge plates are fixed to the left side and the right side of the door, and the door lintel plate is arranged above the door. The splicing positions of the upper ends of the ALC light partition wall battens, the door head plate and the door lintel plate are connected in a clamped mode through U-shaped clamps. A fastener is arranged on the U-shaped clamp and is connected between a top plate of the U-shaped clamp and the structural beam / plate; a mortar layer is arranged between the ALC light partition wall and a structural beam / plate at the top of the ALC light partition wall, and mortar used in the mortar layer contains an AEA expanding agent; the two adjacent ALC light partition wall battens are fixed through the U-shaped clamps, the flatness and the structural stability of the ALC light partition wall battens can be improved, the inverted-U-shaped clamps and the structural beams are fixed through the fasteners, the structural stability of an inner wall is further improved, the square tube steel columns / concrete constructional columns and the structural wall columns are arranged between the ALC light partition wall battens, and the structural wall columns are arranged between the square tube steel columns / concrete constructional columns and the structural wall columns. And the wall body structure can be further reinforced.

This invention provides an asphalt finisher that can precisely adjust the width of the screed by extending and retracting the screed extension cylinder at an appropriate extension and retraction speed. [Solution] The asphalt finisher 100 is equipped with a screed 3 that spreads and levels the paving material PV while moving in the laying direction. The asphalt finisher 100 includes a screed extension cylinder 26, a switching valve 34, a screed position sensor 51C, and a controller 50. The controller 50 calculates the target trajectory of the side frame 32 where the side frame 32 is located, and calculates the extension and retraction speed of the screed extension cylinder 26 based on the deviation between the target trajectory of the side frame and the current position of the side frame 32 detected by the screed position sensor 51C. The controller 50 then controls the screed extension and retraction cylinder 26 by switching the switching valve 34 on and off based on the extension and retraction speed.

The utility model discloses a continuous heat preservation self-compensation outer wall composite wallboard, which relates to the technical field of constructional engineering and comprises a mortar layer, a fireproof heat preservation layer, a polyurethane layer and a light board base layer which are sequentially stacked, and first grooves are formed in one side, close to the polyurethane layer, of the fireproof heat preservation layer and one side, close to the polyurethane layer, of the light board base layer. The first grooves in the fireproof heat preservation layer and the first grooves in the light board base layer are arranged correspondingly, and first protruding strips matched with the first grooves are arranged on the two sides of the polyurethane layer correspondingly. The heat preservation structure further comprises heat preservation nails, the heat preservation nails sequentially penetrate through the fireproof heat preservation layer and the polyurethane layer from the mortar layer and stretch into the light board base layer, the front ends of the heat preservation nails are anchored to the interior of the light board base layer, and the heat preservation nails penetrate through the first protruding strips. According to the utility model, the connection strength among the fireproof thermal insulation layer, the polyurethane layer and the light board base layer can be improved; the anchoring parts of the heat preservation nails are arranged at the positions of the first protruding strips of the polyurethane layer, so that the cold-bridge-free structure of the composite wallboard is achieved.

The utility model relates to a walking unit for a magnetic wheel type automatic trowelling machine, which is characterized by comprising a driving motor mounted on a motor supporting platform, and the motor supporting platform is fixedly connected with a walking frame of the trowelling machine; the driving wheel is connected to the driving motor; the transmission belt or the transmission chain is connected with the driving wheel; the two magnetic walking wheel sets are connected to the driving wheel through the transmission belt or the transmission chain. Through the unique magnetic walking wheel set design and the reasonable transmission structure, the walking stability and accuracy of the automatic trowelling machine can be effectively improved, the trowelling operation quality is guaranteed, and the production requirements of the modern large concrete prefabrication industry for high-quality concrete prefabricated parts are met.

The invention relates to the technical field of underwater leveling machine construction, in particular to an underwater leveling machine with an obstacle handling function. Comprising a leveling machine main frame and a stone digging device, the stone digging device comprises a digging arm and a digging bucket connected to the front end of the digging arm, and the digging arm is arranged on the leveling machine main frame and can move transversely and longitudinally relative to the leveling machine main frame. According to the underwater leveling machine with the obstacle handling function, the stone digging device is arranged on the leveling machine main frame, the stone digging device comprises the digging arm, the digging bucket is arranged at the front end of the digging arm, and when stone possibly interfering with a material distribution pipe is encountered, the digging arm transversely and longitudinally moves relative to the leveling machine main frame, so that the material distribution pipe can be blocked; when the underwater leveling machine works underwater, the excavator bucket is moved to a preset position, the stones are excavated, then the excavating arm transversely and longitudinally moves relative to the leveling machine main frame, the stones are moved to other positions, and therefore the purpose of assisting in obstacle removing in the underwater operation process of the underwater leveling machine is achieved.

The utility model discloses a novel assembly type heat preservation plate joint water stop structure which comprises a plate edge connecting structure which comprises a groove formed in the side portion of a heat preservation plate in the length direction of the heat preservation plate in a penetrating mode, a pouring groove defined by the grooves of two adjacent heat preservation plates, and a reinforcing connecting part arranged on the side wall of the groove. The reinforcing connecting piece comprises a welding part arranged on the side wall of the groove; the plate edge reinforcing structure comprises a first filling layer in the pouring groove, a second filling layer arranged between every two adjacent grooves, a gridding cloth layer arranged on a reinforcing connecting part, a reinforcing layer and a facing layer. Through the arrangement of the anti-crack mortar layers in the welding part, the first filling layer, the second filling layer, the gridding cloth layer and the reinforcing layer, cracking of a plate joint can be effectively avoided, so that the water stop performance, the waterproof performance and the shock resistance of the heat preservation plate joint are improved; and through the arrangement of the waterproof layer in the reinforcing layer, a waterproof and water-stopping barrier can be additionally arranged on the outer side of the joint of the heat preservation plate, and the waterproof performance of the outer wall is further improved.

The utility model discloses a high-performance fireproof heat-insulation XPS (extruded polystyrene) insulation board for a building, and relates to the field of XPS insulation boards. The thermal insulation board comprises a thermal insulation board body, elastic mesh cloth is fixedly pasted on the periphery of the back of the thermal insulation board body, the whole elastic mesh cloth is of a concentric-square-shaped structure, the outer edge of the elastic mesh cloth extends to the outer side of the thermal insulation board body, and when adjacent thermal insulation board bodies are spliced, the elastic mesh cloth is of a staggered structure. According to the utility model, through the clip-shaped elastic mesh cloth, after a plurality of insulation board main bodies are mounted, the elastic mesh cloth on the back parts of the insulation board main bodies can naturally form a staggered structure, so that the mounting structure firmness between the insulation board main bodies and a wall surface is enhanced, and more importantly, the deformation stress can be effectively dispersed; due to the fact that the wall face and the mortar layer possibly generate tiny deformation due to thermal expansion and cold contraction, the staggered structure of the elastic screen cloth can absorb the deformation, and therefore the influence on the heat preservation plate body is reduced.

The utility model relates to an ironing plate for a paver and belongs to the field of pavers. According to the technical scheme, the device comprises a basic section ironing device, telescopic section ironing devices are arranged on the two sides of the basic section ironing device in a sliding mode respectively, a telescopic mechanism is arranged between the basic section ironing device and the telescopic section ironing devices, a connecting frame is arranged on the basic section ironing device, and a first guide hole is formed in the connecting frame; the telescopic mechanism comprises a first side end plate, a second side end plate and two layers of sliding columns arranged between the two side end plates, the number of each layer of sliding columns is at least two, the upper layer of sliding columns are arranged in the first guide holes in a sliding mode, the lower layer of sliding columns are connected with the telescopic section ironing device in a sliding mode, and the two layers of sliding columns move together during primary stretching; the two layers of sliding columns do not move in the second-stage stretching and retracting process, the stretching and retracting section ironing device moves in the length direction of the sliding columns to complete second-stage stretching and retracting, and the situation that due to the fact that two independent stretching and retracting mechanisms are adopted on one side, the torsional deformation resistance is weak, and then the requirement for heavy-load construction is difficult to meet is avoided.

The utility model discloses a secondary drainage system which comprises a main drainage pipe located in a floor structure, a waterproof leveling layer is laid at the upper end of the floor structure, a waterproof layer is laid at the upper end of the waterproof leveling layer, one end of the waterproof layer is rolled downwards to the inner wall of the main drainage pipe, and the other end of the waterproof layer is rolled downwards to the inner wall of the main drainage pipe. A secondary drainage component is inserted into an opening in the upper end of the main drainage pipe, the secondary drainage component comprises an annular filter cover installed at the upper end of the waterproof layer and an adapting pipe arranged in the annular filter cover in a sleeved mode, the upper end of the adapting pipe is connected with a floor drain, and a waterproof protection layer is laid on the peripheral side of the annular filter cover. The upper end of the waterproof protection layer is connected with a brick surface layer through a mortar layer, and a plurality of U-shaped cavities communicated with the main drainage pipe are evenly formed in the outer side face of the annular filter cover. The secondary drainage component is connected with the main drainage pipe, the construction form is simple, accumulated water on the waterproof layer can be effectively drained, and the steel wire mesh is embedded in the annular filter cover, so that mortar is prevented from blocking the U-shaped cavity.

The utility model discloses an asphalt paving active heating type bulldozing plate, which relates to the field of asphalt paving and comprises a bulldozing plate, electric heating plates are mounted at the bottom and on one side of the bulldozing plate, and a material pushing component is arranged on one side of the bulldozing plate. And the pushing assembly comprises a guide rod mounted above one side of the flattening plate, and a bracket and two fixing plates which are mounted on the other side of the flattening plate. Through the arrangement of the material pushing assembly, when the flattening plate needs to be used, the driving motor can be started, the driving motor can work to drive the driving bevel gear to rotate, then the driven bevel gear is driven to rotate, then the reciprocating screw rod is driven to rotate, the reciprocating screw rod drives the movable seat to move in a reciprocating mode, and the movable seat can drive the connecting plate to move when moving. The connecting plate drives the pushing plate to move, so that the pushing plate can push the asphalt close to one side of the bulldozing plate to move, the asphalt close to the middle part of one side of the bulldozing plate can move towards the direction of the electric heating plate, and the electric heating plate can conveniently heat the asphalt.