334results about How to "Improve construction quality" patented technology

The invention discloses a mass concrete construction temperature control anti-cracking integrated system and method, and the system comprises a construction module which is used for constructing a cooling water pipe fine model based on concrete thermodynamic parameters and construction conditions, solving a heat flow coupling control equation through a heat flow coupling algorithm, and determining a concrete internal temperature field and stress field distribution cloud chart; the monitoring module is used for collecting attribute data of concrete; the comparison module is used for comparing the attribute data with the concrete internal temperature field and stress field distribution cloud atlas, correcting model parameters of the heat flow coupling model according to a comparison result, generating a regulation and control instruction and sending the regulation and control instruction to the execution module; the execution module is used for receiving and executing the regulation and control instruction; the regulation and control instruction comprises at least one of temperature regulation and pouring time sequence optimization. A temperature field and a stress field are accurately predicted, complex construction working conditions are matched, mechanical and thermal state changes of the whole life cycle of concrete are captured in real time, temperature control adjustment is effectively conducted, and the construction quality is improved.

The utility model relates to a prefabricated middle partition wall structure of a tunnel ventilation inclined shaft. The prefabricated middle partition wall structure at least comprises a bottom supporting structure, a steel supporting assembly and a prefabricated modular wallboard. A positioning groove is formed in the top face of the bottom supporting structure, and the bottom of the steel supporting assembly is embedded into the positioning groove and fixed. The prefabricated modular wallboard is formed by splicing a plurality of prefabricated slabs, the adjacent prefabricated slabs are connected through tongue-and-groove structures which are matched in a concave-convex mode, and the tongue-and-groove joints are filled with sealing materials. The steel supporting assemblies are longitudinally arranged at intervals, and the tops of the steel supporting assemblies are fixed to a tunnel lining to form a steel-concrete combined structure for supporting the prefabricated modular wallboard. The steel supporting assembly and the prefabricated modular wall plate form a steel-concrete prefabricated structure, and the stability of the whole structure is enhanced. By adopting the autoclaved aerated concrete precast block material and the concave-convex groove embedded modular structure, the problems that the construction quality is difficult to control, the construction period is long, the on-way resistance of air flow is large and the like in the existing reinforced concrete mid-partition wall are solved.

This invention provides an intelligent vibration temperature control device for concrete pouring in hydraulic engineering, relating to the field of vibration equipment technology. It includes a main vibrating rod, a lower connecting support rod, an external temperature control hose, and a temperature control storage tank. The lower connecting support rod and the external temperature control hose are arranged in a ring array on the outer side of the main vibrating rod. The external temperature control hose and the temperature control storage tank are interconnected. The tail end of the lower connecting support rod is rotatably connected to a middle connecting rod, and the tail end of the middle connecting rod is rotatably connected to the head end of an upper connecting support rod. The middle connecting rod, the upper connecting support rod, and the lower connecting support rod together form a V-shaped linkage mechanism and are arranged in a ring array outside the main vibrating rod. The external temperature control hose maintains a V-shaped bend simultaneously. The external temperature control hose extends and moves away from the main vibrating rod, expanding the temperature control influence range and improving temperature control efficiency. This solves the problem that the fixed, close-fitting temperature control pipeline for vibration can only cool a very small area of ​​concrete in the center of the vibrating rod, resulting in a small temperature control influence range.

The utility model provides side slope concrete spraying equipment which comprises a slope top moving mechanism and a slope bottom moving mechanism which are arranged on the top of a side slope and the bottom of the side slope, a guide mechanism parallel to the side slope is arranged between the slope top moving mechanism and the slope bottom moving mechanism, and a spraying mechanism capable of sliding in the height direction of the side slope is arranged on the guide mechanism. A lifting mechanism connected with the spraying mechanism is arranged on the slope top moving mechanism, a concrete spraying machine is arranged on the slope bottom moving mechanism, and the conveying end of the concrete spraying machine is connected with the spraying mechanism through a telescopic hose. The moving mechanisms are arranged at the top and the bottom of the side slope and matched with the guide mechanism parallel to the side slope, so that the spraying mechanism can stably ascend and descend along the guide mechanism, ecological concrete is accurately sprayed to the side slope, mechanization and continuity of spraying operation are effectively achieved, and the working efficiency is improved. And the phenomena of concrete dispersion and waste caused by long distance and large height in manual operation are avoided, and the spraying uniformity and the construction quality are remarkably improved.

The application discloses a large-span steel structure and a metal roof integrated construction method thereof, and mainly comprises the following steps: (1) arranging assembling jigs and fulcrums at boundary positions on an assembling operation surface according to the construction partition, design boundary and assembling requirement of the large-span steel structure; (2) completing the assembling construction of the large-span steel structure on the assembling jigs; (3) reserving part of the assembling jig fulcrums near the original support boundary of the large-span steel structure and unloading the rest of the assembling jig fulcrums; (4) completing the metal roof system installation operation on the unloaded steel structure; (5) installing corresponding lifting or hoisting construction measures; (6) integrally lifting or hoisting and positioning; (7) fixing the large-span steel structure and the metal roof on a supporting structure; and (8) integrally unloading and completing the construction. The application solves the defects of the existing steel structure and metal roof integrated construction, can avoid the excessive deformation of the metal roof in the integrated construction process, is safe and controllable, and significantly improves the construction quality.

The utility model relates to the technical field of building construction, and discloses a pile foundation reinforcement cage lengthening operation annular platform which comprises an installation face, a steel casing is installed at the top of the installation face, a cage body is installed in the steel casing, a plurality of steel plate platforms are arranged at the top of the steel casing, and clamping grooves are formed in the left ends and the right ends of the tops of the steel plate platforms. Clamping blocks are detachably connected to the inner walls of every two adjacent clamping grooves, supporting plates are fixedly connected to the bottoms of the clamping blocks, fixing seats are fixedly connected to the middle ends of the bottoms of the supporting plates, threaded rods are in threaded connection to the bottoms of the fixing seats, and bottom supporting blocks are fixedly connected to the bottoms of the threaded rods. According to the utility model, the plurality of steel plate platforms are spliced into the circular ring to fill the gap between the steel casing and the reinforcement cage, so that the falling risk of workers is greatly reduced, and the safety of the workers is guaranteed; and meanwhile, through the design of splicing of the convex blocks and the grooves and height adjustment of the screws and the fixing bases, installation is convenient, height adjustment is flexible, and construction efficiency and quality are improved.

This utility model provides a disc-lock node structure, which includes: a horizontal support frame; a vertical fastener disposed on the horizontal support frame, with its end connected to the end of the horizontal support frame to form an inverted L-shaped structure; and a clamping lock disposed on the horizontal support frame in a position-adjustable manner along its length. This utility model allows the clamping lock to move towards the vertical fastener, enabling both the clamping lock and the vertical fastener to be inserted into the connecting hole of the connecting disc and the fixing hole of the member to be fixed, and to move away from the vertical fastener, so that the clamping lock and the vertical fastener can respectively abut against the inner wall of the fixing hole along the radial direction of the fixing hole and the connecting hole, thus securing the clamping lock to the member to be fixed and achieving a fixed connection between the connecting disc and the member to be fixed.

The application discloses a prefabricated railway beam three-wall synchronous line-under construction measurement method, a bk field inner reference net point layout, a beam bottom embedded plate hole group center measurement in a beam manufacturing area, a beam manufacturing area central axis point position calculation, a beam manufacturing area coordinate conversion, a beam manufacturing area three-wall steel bar boundary line lofting, a beam manufacturing area beam top matching point accurate lofting, a stored beam area accurate measurement matching point, a stored beam area central axis point position calculation, a stored beam area coordinate conversion, a stored beam area three-wall contour line lofting and template checking, a three-wall completion line shape measurement, and prefabricated beam erection control.

This utility model relates to a multifunctional mobile protective canopy device, including support legs, a steel pipe canopy frame, a sliding cover plate, a sliding wheel assembly, and a sealing membrane. During rebar tying, the canopy frame is installed on the rebar tying jig for tying the box girder rebar skeleton. During the tying process, the sliding cover plate on top of the canopy can be adjusted to provide sunshade protection for the operators. After the steel beam is tied, the support legs are fixedly connected to the rebar skeleton. A gantry crane is used to lift the steel pipe canopy, which also serves as a lifting tool, moving the rebar cage to complete the rebar cage installation. After the rebar cage is installed, concrete is poured. During the pouring process, the sliding cover plate can be moved to clear the pouring space, completing the concrete pouring. After the concrete is poured, the sealing membrane is lowered, forming a sealed space for the concrete box girder, creating a closed curing space for the concrete and improving the curing effect. This protective canopy can achieve multiple functions, including rebar tying protection, rebar cage lifting, and sealed concrete curing protection. It is suitable for the prefabrication of large-size concrete box girders, improving construction efficiency and quality.

The utility model provides a device for detecting template verticality, which comprises a supporting piece, a sliding piece and a measuring piece, the supporting piece is arranged on one side of a template to be detected, the sliding piece is arranged on the supporting piece and can move up and down along the supporting piece, the measuring piece is arranged on the sliding piece and can move up and down along the supporting piece, and the measuring piece is arranged on the sliding piece and can move up and down along the supporting piece. The horizontal distance measuring device is used for measuring the horizontal distance between the different heights of the supporting piece and the to-be-measured template. The vertical template verticality detection device has the advantages that an operator can detect the verticality of a vertical template without climbing, the operation is convenient, the measurement time is shortened, the working efficiency is improved, the potential safety hazard is reduced, multi-point measurement is carried out by adopting the range finder, the measurement error is reduced, the verticality detection precision of the vertical template is ensured, and the working efficiency is improved. And the construction quality is improved.

The utility model provides a kind of assembled concrete composite floor structure, it is related to concrete composite floor technical field, including: prefabricated slab and concrete cast-in-place layer, the prefabricated slab upper end is poured with concrete cast-in-place layer, the prefabricated slab left and right side end is symmetrically provided with first component and second component, the first component and second component side end face are provided with filling cavity, the filling cavity is injected with anti-seepage filler layer, the first component and second component are fixed with the side end face of prefabricated slab by anti-seepage filler layer and are bonded, the first component and second component side end are correspondingly spliced by arc splicing surface each other, the prefabricated slab upper surface is combined with concrete cast-in-place layer by polypropylene fiber web.The utility model solves the problem that the concrete layer poured on the existing prefabricated slab is easy to seep from joint and affect the construction quality of composite floor.

The application discloses a top putty construction mechanism and a construction method, belongs to the technical field of building robots, and an AGV chassis is fixed with a lifting mechanism, the side of the last stage mechanism of the lifting mechanism is fixed with a first horizontal transverse structure, the surface of the first horizontal transverse structure is slidably connected with a second horizontal transverse structure, the surface of the second horizontal transverse structure is slidably connected with a putty construction structure, the putty construction structure comprises a mounting frame slidably connected with the second horizontal transverse structure, the top of the mounting frame is provided with a wall surface self-adapting structure, the top of the wall surface self-adapting structure is fixed with a scraper module, the wall surface self-adapting structure is driven to rotate through a scraper rotary power module, and the mounting frame is also provided with a putty spraying module. When the product sprays the top putty, full coverage and dead angle-free spraying and scraping can be realized, the construction structure of the product is automatically operated, the working efficiency is high, and the construction quality is better.

The application discloses a kind of steel box-core concrete combined cable tower construction methods, comprising the following steps: S1, the steel structure shell of steel-concrete combined section is divided into multiple steel tower blocks along vertical direction;Standard section is divided into core block and the side block of two sides;S2, hoist first section steel tower block, after installing formwork and reinforcement in steel tower block, fill concrete;S3, repeat the step S2 until the construction of steel-concrete combined section is completed;S4, hoist the core block of first section standard section on steel-concrete combined section, then hoist the side block of two sides in turn;After hoisting is completed, horizontal weld between core block, vertical weld between core block and the side block of two sides, horizontal weld between section are welded in turn;S5, after installing reinforcement in core block, pour concrete;S6, repeat the step S4-S5 until the construction of all remaining standard sections is completed.The application gives a complete and efficient steel box-core concrete combined cable tower construction method, which effectively guarantees the construction quality of cable tower.

The application discloses a kind of visual self-compacting grouting design method and system mould of fabricated structure, belong to the technical field of fabricated structure construction.For the defects such as traditional grouting of fabricated structure invisible, monitoring difficult, easy to cavity segregation and grout waste, the application develops a kind of whole process visible, passive self-compacting grouting method and system mould.The mould is composed of transparent template main body and self-adjusting closing mechanism, and the transparent template includes fixed template and automatic grouting plate, which are connected by tooth groove to form a sealed grouting cavity.The closing mechanism is linked by spring pressure plate, spring group, steel wire and positioning pulley group, and is automatically and accurately closed by the driving of grout pressure and self-weight based on grout pressure and self-weight.The application establishes the quantitative relationship among spring compression amount, grouting pressure and closing angle based on dynamic response analysis, and proposes a new grouting control method, and the mould is designed in a modular way, which can improve construction quality, ensure structure safety and reduce construction cost.

The utility model discloses a quick-release angle brace system for supporting a foundation pit, belongs to the field of foundation pit construction, and solves the problems of inconvenience in disassembly and assembly and incapability of flexible adjustment in the traditional mode of welding and connecting components. The device comprises two bases, the bases are in an isosceles triangle shape, the bevel edges of the two bases are detachably installed on the inner sides of the right-angle edges of an integrated profile steel waist beam respectively, a movable head is arranged on one base, and a diagonal bracing steel pipe is arranged between the other base and the movable head. The quick supporting system can be quickly mounted and dismounted, and the construction efficiency and the construction quality are remarkably improved. The angle brace system eliminates the defects of a welding mode, can be flexibly adjusted according to field conditions and design requirements, and can be repeatedly used after being disassembled, and the service life of the angle brace system is long.

A cable truss, including upper chord cable, lower chord cable, cable clamp, cable clamp support arm, cable end connecting block; the two ends of the cable clamp support arm are respectively provided with a cable clamp, the cable clamp is a cylindrical structure as a whole, which is composed of upper spiral body, middle spiral body and lower spiral body, the joint of the upper spiral body and the middle spiral body is provided with an upper chord cable through hole, and the joint of the middle spiral body and the lower spiral body is provided with a lower chord cable through hole; a plurality of telescopic locking pin shafts are arranged in the upper spiral body and the lower spiral body in the vertical direction, the middle spiral body is provided with locking pin shaft insertion holes corresponding to the locking pin shafts, and the locking pin shafts are inserted and matched with the locking pin shaft insertion holes. The application solves the design problem of the cable net node, reduces the adverse effect of the unbalanced force between the cable nets on the overall structure, increases the force rationality of the node and the safety of the whole cable net, reduces the processing and manufacturing cost and the construction difficulty, and can be applied to the "sky round place" structure of the "Dream of Red Mansions" drama fantasy garden engineering.

The utility model provides a kind of formwork for station internal stand column diameter expansion construction, including steel hoop assembly and wooden formwork assembly;The wooden formwork assembly includes two semicircular templates, and two semicircular templates are formed into a whole circle by surrounding and splicing;The template includes melamine board layer, plywood layer, support batten layer and assembled batten layer from inside to outside in turn;The melamine board layer and plywood layer are fixed by adhesive method, for making the template inner surface even;The support batten layer is arranged around the outer periphery of the plywood layer by adhesive method, for whole circle support;The assembled batten layer is wrapped outside support batten layer for constraining the overall shape of the template;The steel hoop assembly includes a pair of semicircular steel hoops arranged in pairs, a pair of semicircular steel hoops are used for locking outside wooden formwork assembly, and each steel hoop assembly is arranged equidistantly along the length direction of wooden formwork assembly.The template has the advantages of improving construction efficiency and ensuring the appearance quality after stand column diameter expansion.

The present application belongs to the technical field of formwork support, and particularly discloses a special-shaped column formwork support device and method. The device comprises a plurality of support modules arranged along the circumference of the wood block cross section and a deformation monitoring module. The support module comprises a hinged telescopic connecting rod unit and a locking unit. A plurality of the hinged telescopic connecting rod units are connected in sequence to form a ring structure, and the hinged telescopic connecting rod unit can be telescopic adjusted to adapt to different wood block cross sections. The locking unit is used for locking two adjacent hinged telescopic connecting rod units to achieve fastening support of the special-shaped column formwork. The deformation monitoring module is arranged on the hinged telescopic connecting rod unit and used for monitoring the deformation of the formwork at different height cross sections. The present application can be freely adjusted according to the shape of the special-shaped column, thereby better supporting the concrete column formwork. Meanwhile, the fastener is positioned and deformation monitored during the fastening process, thereby avoiding the deformation and inclination of the formwork.

The application provides a sensor arrangement optimization method, device, equipment and storage medium for a segment erector. It relates to the technical field of sensor layout. The method comprises: establishing a three-dimensional model of a segment erector to which sensors are to be arranged, determining possible installation points of the sensors according to the shape and size of the three-dimensional model; constructing a sensor element library based on the three-dimensional model; wherein the sensor element library is used to determine different types of sensors; determining a spatial effective range of the sensors through simulation analysis according to the field environment and the segment size; constructing an optimization objective function with data precision quality, sensor data processing real-time performance and cost as targets; solving the optimization objective function based on particle swarm optimization to obtain an optimal sensor arrangement scheme. The application can provide a more flexible sensor configuration strategy for the segment erector under different tunnel diameters, curvature radii or complex working conditions.

The utility model relates to the technical field of road construction, and discloses an anti-pollution device for a kerb spraying layer oil. The device comprises an inverted-U-shaped base, walking wheels are arranged on the inner wall of a horizontal section of the base, limiting wheels are arranged on the inner wall of a vertical section of the base, a movable handrail is arranged above the base, an oil blocking part and a sweeping part are arranged on the vertical section close to a kerb oil spraying face, the sweeping part is located on one side of the advancing direction of the oil blocking part, and the oil blocking part comprises a Z-shaped oil blocking plate. When in use, the device is pushed by moving the handrail to move along with the permeable oil vehicle on the curb, the walking wheels and the limiting wheels ensure stability, the oil blocking part effectively shields permeable oil and prevents the permeable oil from splashing to pollute the surface of the curb, the sweeping part cleans the surface of the curb in advance, and the bonding degree of the curb and an asphalt concrete surface layer is enhanced; the heights of the oil blocking part and the cleaning part are adjustable to adapt to different construction scenes; the problems that the kerb is polluted by prime coat oil and the bonding quality is poor in a traditional process are solved, and the road construction quality and efficiency are improved.

The utility model discloses a slab type ballastless track base plate formwork, including two side steel mould, the side steel mould is by base plate side mould top surface steel sheet, base plate side mould bottom surface steel sheet, base plate side mould panel and base plate side mould formwork rib plate welding composition, and the square steel of being connected between two side steel moulds, and the base plate expansion joint plug -in board of being set between two side steel moulds and being at square steel rear, the utility model discloses adopts the bolt assembly of block type steel formwork, and each base plate is by two steel moulds, and expansion joint position is disconnected with square steel and is connected two side formworks and square steel through bolt, and the expansion joint foam board is clamped between two base plate formworks with the collocation plug -in board, and this design effectively avoids the disturbance of concrete pouring and personnel trample to expansion joint, ensures that expansion joint is vertical, and linear is straight, greatly improves expansion joint construction quality, lays the foundation for track plate accurate laying, guarantees the high -quality completion of high -speed railway slab type ballastless track base plate construction.

The utility model relates to building construction equipment technical field discloses concrete trowelling device, including counterweight base, module support, retainer, drive mechanism, through slide hole, vertical lifting mechanism and board body. Adopt this structure, through drive mechanism drive module support and board body to and fro movement carries out concrete trowelling operation, greatly alleviated operator's labor intensity, improved work efficiency, board body, module support and so on spare adopt detachable connection design, can according to the length and width of room flexible adjustment device's work size, and when the spare damage is convenient to replace, reduce cost, strong adaptability, vertical lifting mechanism, the height of board body is accurately controlled, guarantees the consistency of concrete trowelling thickness, compared with artificial scraping, can make concrete surface more even, improves construction quality, and, when the device of the application carries out trowelling work, the workman can carry out operation in other room, and the overall operation efficiency is improved.

This utility model discloses a grooving device for decoration construction, belonging to the technical field of grooving equipment for decoration construction. It includes a motor assembly and a cutting assembly. The motor assembly and the blade within the cutting assembly are connected via a belt drive assembly. A positioning mechanism is fixedly installed on the outer wall of the motor assembly and is fixedly connected to the cutting assembly. The positioning mechanism includes a first positioning rod and a second positioning rod. During operation, the device's contact plate contacts the construction surface. The positioning mechanism, through the first and second positioning rods, respectively fixes the cutting assembly and the motor assembly, enhancing the overall structural stability. The contact plate can closely adhere to the construction surface, improving the equipment's operational flexibility and adaptability. The guide hole guides the sliding of the vertical rod to prevent deviation, ensuring grooving accuracy. The coordinated action of all components ensures both stable power and precise positioning during grooving, improving construction quality and efficiency.

The application relates to a kind of annular bracket stiff concrete beam column node construction device and construction method, including beam column construction mechanism and construction driving mechanism;Beam column construction mechanism includes multiple construction frames, multiple construction frames are arranged side by side between. First gear and second gear are driven to transmit by motor, so that second gear drives rotating rod and connecting column to rotate, connecting column drives another second gear to rotate by sleeve, so that two second gears and two gear ring assemblies are driven, two gear ring assemblies can drive steel beam column to rotate by locking assembly, the surface of steel beam column can be conveniently laid on steel beam column by workman in multiple faces, avoid subsequent still need to carry out steel beam column hoisting to adjust angle and continue construction, lead to the problem of tedious, so as to improve construction efficiency;Extension assembly is connected by slider and sliding sleeve and construction frame, so that construction frame can be unfolded by extension assembly, so as to extend the support length of steel beam column.

This application discloses a bolt hole sealing device for shear walls, relating to the field of building construction technology. A piston is inserted into the cylinder through a top opening and slides axially within the cylinder. The bottom of the cylinder is fitted onto the top surface of a plastering board. A discharge port is located at the bottom of the cylinder, and an outlet is located on the plastering board corresponding to the discharge port. An opening and closing device is provided at the outlet to control its opening and closing. Storing mortar within the cylinder effectively prevents leakage during construction, avoiding mortar waste. The plastering board is placed against the shear wall, and the piston pushes the mortar in the cylinder into the bolt hole. The opening and closing device then closes the outlet, and the plastering board compacts and smooths the mortar. Under the pressure of the piston injection and the force of the plastering board, the bolt hole is sealed tightly, preventing mortar sagging, protecting the cleanliness of the working environment, improving construction quality, and avoiding repeated construction to increase work efficiency.

The application discloses a rectangular frame column settlement observation point pre-burying device and a pre-burying construction method. The device comprises a first L-shaped plate, a second L-shaped plate and a gear mechanism. The gear mechanism comprises a hollow rectangular base plate, a gear and a positioning ring. A settlement observation rod is arranged in the positioning ring, the gear and the hollow rectangular base plate. Upper bolts and lower bolts are arranged on the positioning ring. The method comprises the following steps: 1, rectangular frame column steel bar binding and formwork erection; 2, adjustment of the rectangular frame column settlement observation point pre-burying device; 3, installation of the rectangular frame column settlement observation point pre-burying device; 4, installation of the settlement observation rod; 5, concrete pouring and settlement observation rod pre-burying; and 6, removal of the rectangular frame column settlement observation point pre-burying device. After the rectangular frame column formwork is installed, the settlement observation point pre-burying device is used to pre-bury and fix the settlement observation point.

The utility model belongs to engineering construction technical field discloses a kind of diaphragm wall construction protection devices, it protects guide wall in diaphragm wall construction process, and diaphragm wall construction protection device includes support frame and limit plate, support frame includes bottom plate and inclined plate, inclined plate is connected on bottom plate, and with bottom plate angle setting, two support frames are connected with adjusting assembly, to can make two inclined plates opposite, adjusting assembly can adjust the distance between two support frames;Limit plate is set on the side of bottom plate away from inclined plate, and limit plate is vertically arranged with bottom plate;When underground continuous wall grooving, the grab bucket of grooving machine is close to guide wall and can be blocked by inclined plate, and be guided by inclined plate, guide to between two support frames, to reduce the possibility of guide wall damage, improve the construction quality of diaphragm wall.

The invention discloses a color-developable waterborne polyurethane dust suppressant and a preparation method thereof, and belongs to the technical field of dust suppressant preparation, the color-developable waterborne polyurethane dust suppressant comprises the following components by weight: 5-20 parts of waterborne polyurethane, 1-10 parts of latex powder, 0.5-5 parts of organic wax, 0.5-5 parts of color paste, 0.5-3 parts of paper pulp, 0.5-3 parts of a thickener, 0.1-0.5 part of an auxiliary agent, 5-10 parts of a film forming auxiliary agent, and 70-90 parts of water. According to the dust suppressant, waterborne polyurethane serves as a film forming substance and can be combined with coal particles to form a film layer of 1 mm-2 mm, a formed cured film is high in strength, good in toughness and high in adhesive force, pulverized coal particles can be effectively isolated, wind and rain erosion can be resisted, the dust suppression period is long, certain hydrophobicity is achieved, the dust suppressant is not prone to being washed away, the service life is greatly prolonged, and the dust suppressant is suitable for being popularized and used. And the dust suppressant takes water as a dispersion medium, the VOC content is extremely low, the selected coloring agent is environment-friendly, no pollution is caused to soil and underground water, and the development direction of green chemistry is met.

The utility model relates to the field of leveling of veneers, in particular to a three-in-one appliance for leveling, sagging and positioning steps of veneers, which comprises a bent vertical short rod, a transverse long rod, a middle long rod, a horizontal bubble instrument and an adjusting knob. The two sets of bent vertical short rods are arranged in parallel, the two sets of transverse long rods are arranged between the two bent vertical short rods in parallel, the middle long rod is arranged between the two transverse long rods, and the two ends of the transverse long rods and the two ends of the middle long rod are perpendicularly connected with the bent vertical short rods on the two sides. The horizontal bubble instrument is horizontally fixed on the upper surface of the middle long rod; and the adjusting knob is arranged on the bent vertical short rod. According to the utility model, the functions of paving, plumb finding and positioning are integrated. The veneer leveling device is mainly applied to the field of veneer leveling.