99results about How to "Improve the construction environment" patented technology

The invention discloses a normal-temperature rapid early-strength high-performance asphalt cold-patch material and a preparation method thereof, and the asphalt cold-patch material comprises the following substances in percentage by mass: 80-86 wt% of aggregate, 7.5-11 wt% of mineral powder, 0.5-1 wt% of cement, 0.5-1 wt% of slaked lime, 0.2-0.4 wt% of bentonite, 0.2-0.4 wt% of lignin fiber and 5-7 wt% of asphalt cold-patch liquid, d40 dearomatization solvent naphtha or a mixture of D40 dearomatization solvent naphtha and D60 dearomatization solvent naphtha is used as a diluent in the asphalt cold supplementing liquid. The method comprises the following steps: preparing asphalt cold supplementing liquid; drying the aggregate, the mineral powder, the cement, the slaked lime and the bentonite; putting the aggregate, the cement, the slaked lime, the bentonite and the lignin fiber into a mixing pot and stirring; adding the asphalt cold supplementing liquid into the mixing pot and stirring; and adding the mineral powder into the mixing pot, and stirring to obtain the rapid early-strength high-performance asphalt cold patch material at normal temperature. The asphalt cold-patch material disclosed by the invention can quickly form strength within an extremely short time, ensures quick passage after pit slot repair, and maximally reduces the influence of traffic transportation.

The invention discloses a cold patch asphalt mixture based on dearomatization solvent oil and a preparation method thereof, the cold patch asphalt mixture comprises the following substances in percentage by mass: 89-91 wt% of aggregate, 2-3 wt% of mineral powder, 2-3 wt% of cement, 0.4-0.6 wt% of bentonite and 4-6 wt% of asphalt cold patch liquid, and D60 dearomatization solvent oil is used as a diluent in the asphalt cold patch liquid. The preparation method comprises the following steps: preparing asphalt cold supplementing liquid, and preserving heat for later use; drying the aggregate, the mineral powder, the cement and the bentonite, and preserving heat for later use; the mixing pot is heated, and the aggregate, the cement and the bentonite are put into the mixing pot to be stirred; adding the asphalt cold supplementing liquid into the mixing pot for stirring; and adding the mineral powder into the mixing pot, and stirring to obtain the cold patch asphalt mixture based on the dearomatization solvent oil. The cold patch asphalt mixture prepared by the invention has excellent comprehensive performance, perfectly meets the performance requirement of a hot mix asphalt mixture, can quickly form strength, can quickly open traffic after repairing pits and slots, and has small influence on road traffic.

The utility model relates to a circulating water pipeline foundation structure for a soft soil foundation large-area soil filling field, which comprises a foundation structure body, and the foundation structure body consists of a plurality of settlement reduction composite sparse piles, a raft foundation, a reinforced concrete wing wall, an artificial soil arc sand foundation, backfill plain soil and a circulating water pipeline, the bottoms of the subsidence reduction composite sparse piles penetrate through the upper soft soil layer and are supported on the hard soil layer, the tops of the subsidence reduction composite sparse piles are embedded into the raft foundation, reinforced concrete wing walls are poured over the raft foundation, the space between the raft foundation and the reinforced concrete wing walls is filled with an artificial soil arc sand foundation, and a circulating water pipeline is placed in the artificial soil arc sand foundation. A gap is reserved between the circulating water pipeline and the raft foundation, and the backfill plain soil is used for filling other remaining excavation areas. The device is simple and reasonable in structure, pipeline sedimentation is reliably and effectively controlled, and powerful support can be provided for soil arc sand foundations on the two sides of the thoracic cavity of the pipeline, so that the operation safety of the circulating water pipeline is ensured.

The perforating device comprises an XYZ three-axis cantilever type sliding table, a mounting plate is fixedly connected to a transmission table of the XYZ three-axis cantilever type sliding table, a square sleeve is fixedly mounted on the side portion of the mounting plate, the inner wall of the square sleeve is slidably connected with a movable plate in a sleeved mode, and the movable plate is fixedly connected with the transmission table of the XYZ three-axis cantilever type sliding table. A roller is installed at the end, located on the side of the mounting plate, of the movable plate, a first spring used for elastically supporting the movable plate in the roller direction is installed on the square sleeve, an electric drilling machine is fixedly installed at the end, away from the roller, of the movable plate, and a water spraying mechanism is installed on the movable plate; and a rotating disc is mounted on the side portion of the mounting plate, and six pressing wheels are mounted on the periphery of the rotating disc. According to the comprehensive pipe gallery side wall drilling device, the problems that a drill bit is prone to being stuck, overheated, deformed and damaged due to unsmooth deslagging, insufficient cooling and the like in the comprehensive pipe gallery side wall drilling operation of a traditional drilling device, then the construction efficiency and quality are affected, and the cost is increased are solved.

The invention discloses a support-free assembled integral open-cut driving tunnel structure system and a construction method. A bottom plate of a tunnel on the lowermost layer is of a bottom plate cast-in-place structure; the side wall and the top plate of each tunnel are each of a laminated slab structure. The laminated slab structure comprises a prefabricated slab facing the interior of the tunnel and a cast-in-place layer facing the exterior of the tunnel. The side wall of the uppermost tunnel and the cast-in-place layer of the top plate are integrally poured, and the cast-in-place layers of the other side walls and the cast-in-place layers of the corresponding top plates are separately poured; during construction, corner connecting components are arranged between the bottom plate and the side wall, between the bottom plate and the middle partition wall, between the top plate and the side wall or between the top plate and the middle partition wall of each tunnel. During construction, the side wall and the top plate of each layer of tunnel are assembled one by one, and the precast slab and the wall-attached enclosure of each side wall are used as a cast-in-place formwork of the side wall to pour concrete. No support is arranged in the construction process, no formwork is needed, efficiency can be improved, and the environment can be improved.

The utility model discloses a split type dust collection mechanism which comprises an exhaust fan, an air pipe, a dust collection cover and a controller, a cavity with an opening is formed in the dust collection cover, the opening is sealed by a mesh, one end of the air pipe is connected with an air inlet pipe of the exhaust fan in an inserted mode, the other end of the air pipe is connected into the cavity, and the controller is electrically connected with the exhaust fan. The dust collection cover can be directly arranged on the periphery of the industrial cutting equipment in a covering mode before the dust collection cover is used, so that in the starting process of the exhaust fan, the dust collection cover is used for continuously sucking air carrying dust in multiple directions on one hand, air and dust are separated in situ on the other hand, the exhibition construction environment is improved, and mutual influence between exhibition points is avoided.

The utility model discloses a dust falling device for a construction site, and particularly relates to the technical field of building construction dust falling, the dust falling device comprises a cart, the cart comprises a bottom plate, a push handle is fixedly connected to the rear side of the upper end of the bottom plate, universal wheels are fixedly connected to the four corners of the lower end of the bottom plate, and a height adjusting assembly is fixedly connected to the middle of the upper end of the bottom plate. A dust falling assembly is fixedly connected to the upper end of the height adjusting assembly, a water storage tank is fixedly connected to the rear side of the upper end of the bottom plate, and a water pump is fixedly connected to the upper end of the water storage tank. According to the dust falling device for the construction site, the height of the device can be adjusted according to the environment of the construction site through the arrangement of the height adjusting assembly, so that the dust falling device can be more accurately aligned with a dust generation source for dust falling, and the dust falling efficiency is improved; the spraying mechanism, the fan and the like are arranged, so that fine fog drops generated by a spraying part can be quickly blown away to a wider area, the fog drops can cover the whole dust falling area more uniformly, and the dust falling effect is improved.

The application discloses a foundation pit supporting structure, relates to the technical field of foundation pit supporting, and comprises a supporting assembly and a reinforcing assembly. The supporting assembly comprises a plurality of base units and a plurality of supporting units. The base units are in abutment with the pit wall on one side of the foundation pit and the pit wall at the bottom. The plurality of supporting units are connected with the plurality of base units, the plurality of supporting units are connected with each other, and the supporting units are in abutment with the pit wall on one side of the foundation pit. The reinforcing assembly comprises a plurality of fixing seats and a plurality of reinforcing pieces. The fixing seats are connected with the foundation on one side of the foundation pit, and the plurality of supporting units are connected with the fixing seats. The reinforcing pieces are located on one side of the supporting assembly, one end of the reinforcing pieces is connected with the fixing seats, and the other end of the reinforcing pieces is connected with the base units. The application can improve the structural strength of the foundation pit supporting structure as a whole and facilitate subsequent construction of construction personnel in the foundation pit.

The application provides a tunnel assembly type groove structure and a fastening method thereof. The groove structure comprises a groove one and a groove two. The groove one is provided with an L-shaped slot on one side top and a side wall to be cast in situ after the precast groove is installed. A middle partition wall is located between the groove one and the groove two, and the groove one and the groove two share the middle partition wall. The bottom plate of the groove structure is provided with a horizontal third trapezoidal slot in the width direction at both ends. The middle partition wall is provided with a first trapezoidal slot in the vertical direction at both ends. The side wall of the groove two is provided with a second trapezoidal slot in the vertical direction at both ends. The wall body of the middle partition wall is provided with a concrete rib, and the concrete rib is provided with a channel steel hole. The groove structure is provided with a pulling hole on the middle partition wall. The bottom plate of the groove structure, the groove two and the middle partition wall form a stop word shape structure. The application has the advantages of simple structure, easy implementation, improved standardization level of the tunnel precast installation groove, and reduced misalignment problem between adjacent precast components.

The utility model relates to the technical field of vibrating bars, and discloses a concrete construction vibrating bar which comprises a movable base, a winding wheel is fixedly installed in the middle of the top face of the movable base, a beam tube mechanism is fixedly installed on one side of the surface of the winding wheel, and a fixing plate is fixedly installed on the top face of the winding wheel. A hydraulic rod is fixedly installed in the middle of the top face of the fixing plate, grooves are formed in the two sides of the top face of the fixing plate, fixing rods are fixedly arranged in the grooves, the two sides of the fixing rods are symmetrically sleeved with damping mechanisms, and the tops of the damping mechanisms are rotationally connected with connecting blocks. According to the construction vibrating bar for concrete, through the arrangement of the damping mechanism, when the vibrating motor operates to generate vibration, the damping rod is pressed to rotate, the damping spring is extruded to deform, and the hydraulic rod stretches and retracts along with the damping rod, so that the damping effect on the vibrating motor is achieved, and the situation that the service life of the vibrating motor is affected due to long-time vibration is avoided.

The utility model relates to the technical field of municipal construction accessories discloses a protection device for pipeline construction anti -collision, including longitudinal steel pipe, circular arc steel pipe, multidirectional pulley, anti -collision steel strip and oblique steel pipe, the longitudinal steel pipe has many, many longitudinal steel pipes are parallel to the length direction of pipeline, at least two longitudinal steel pipes are opposite other and are located downside, and its bottom is provided with multidirectional pulley, at least one longitudinal steel pipe is opposite other and is located upside, and it connects two longitudinal steel pipes with pulley through oblique steel pipe, two longitudinal steel pipes with pulley are connected through circular arc steel pipe between, the longitudinal steel pipe or oblique steel pipe stretches out anti -collision steel strip outward, the utility model aims at providing more effective, reliable and economic and practical anti -collision solution for pipeline construction.

The utility model discloses a box girder internal mold integral drawing mold removal device, which relates to the technical field of bridge engineering construction equipment, and a supporting mechanism comprises a mold plate supporting device used for supporting a box girder internal mold and a bracket device fixed on the mold plate supporting device and used for supporting the mold plate supporting device, the formwork supporting device is provided with a wheel shaft device used for assisting the box girder inner formwork in moving and a limiting device used for axially limiting the box girder inner formwork. The mold pulling mechanism is installed at one end of the supporting mechanism, used for pulling the box girder inner mold to the mold plate supporting device and comprises a power device used for providing traction force and a traction device used for transmitting the traction force to the box girder inner mold. The limiting device is electrically connected with the power device and used for closing the power device when the box girder inner mold makes contact with the limiting device. The operation platforms are installed on the two sides of the supporting mechanism, so that an operator passes to the formwork supporting device to conduct auxiliary hoisting on the box girder inner formwork which is pulled out. The device is high in form removal efficiency and good in safety.

The invention belongs to the technical field of building decoration materials, and particularly relates to a simulation stone outer wall decoration method which comprises the following steps: step 1, constructing a cleaning base layer, removing dust, oil dirt and sundries, checking the flatness and strength of the base layer, ensuring that the base layer is dry, selecting a proper base treatment material, uniformly coating the base treatment material on the base layer, and drying the base treatment material; and drying and curing of the substrate treatment layer are ensured. And step 2, constructing a fiber reinforced layer and an environment-friendly cementing layer, selecting a high-quality reinforced fiber gridding cloth anti-crack material, laying the material on the substrate treatment layer to ensure that the material is free of wrinkles and bubbles, and adhering the material on the base layer by adopting an environment-friendly cementing material. According to the simulation stone outer wall decoration method, by arranging the first step, the second step, the third step, the fourth step and the fifth step, in simulation stone outer wall decoration construction, the decoration quality and durability are improved, the construction efficiency and the environment friendliness are improved, meanwhile, the cost benefit is kept, and therefore the effect that the requirement for high-performance outer wall decoration of modern buildings is met is achieved.

The present invention relates to a multifunctional intelligent fire-fighting dust-raising tower crane, comprising a tower body and a lifting arm, wherein a nozzle moving in the length direction is installed on the lifting arm, and the nozzle is connected to a water supply device. The present invention utilizes the height advantage of the tower crane to spray water from top to bottom to extinguish the fire, and once a fire occurs, it is easy to be observed by the tower crane driver, so the tower crane can be immediately operated to extinguish the fire, thereby ensuring the timeliness of the fire extinguishing, and realizing the fixed-point fire extinguishing through the movement of the nozzle, thereby improving the fire extinguishing efficiency; utilizing the water sprayed by the sprinkler pipe for dust removal and cooling, thereby improving the construction environment of the construction site, and being beneficial to ensuring the health of the construction personnel; and can also be used for the maintenance of cement construction surfaces, thereby reducing the labor and improving the maintenance efficiency.

The utility model relates to the technical field of noise reduction type fences, in particular to a noise reduction type fence for municipal engineering construction, which comprises a mounting sleeve, a baffle is slidably clamped in the mounting sleeve, a lifting component for adjusting the baffle is mounted in the mounting sleeve, the lifting component comprises a two-way threaded shaft, and the two-way threaded shaft is rotatably mounted in the mounting sleeve. A first hand wheel is mounted at the end, extending to one side of the mounting sleeve, of the two-way threaded shaft, two sliding blocks are in threaded connection with the two-way threaded shaft, the sliding blocks are in sliding clamping connection with the mounting sleeve, a mounting groove is formed in the baffle, and an angle-adjustable dust falling assembly is mounted in the mounting groove. The angle of the water mist nozzle can be flexibly adjusted, so that dust falling is facilitated, the construction environment can be improved, the length of the baffle inserted into the mounting sleeve can be flexibly adjusted through the lifting assembly according to use requirements, the height of the water mist spraying device is increased, and then the applicability of the water mist spraying device is improved.

The utility model discloses a wiring terminal press -type machine, include: base plate, vertical fixed on the backboard of base plate, and hot -pressing operating head subassembly, pressure -bearing station, wherein, hot -pressing operating head subassembly includes inverted N shape frame, is located in the pneumatic elevating gear of inverted N shape frame middle part, pneumatic elevating gear output fixed with assembly piece, and is located on the assembly piece on the jack -up mechanism, still include the mounting plate of fixed on backplate, be provided with a plurality of elastic telescopic column on mounting plate, wherein, a plurality of elastic telescopic column top and jack -up mechanism resist touch, and its bottom end is to the direction of pressure -bearing station and is provided with the hot -pressing head structure of different model, the utility model discloses a plurality of hot -pressing head structure is set to the mode of a plurality of wiring terminal synchronous hot -pressing, improves hot -pressing efficiency, and with the structure characteristics of jack -up mechanism and a plurality of elastic telescopic column again with the design of different model of hot -pressing head structure, guarantee hot -pressing quality again.

The invention relates to the technical field of masterbatch preparation, and discloses a wet masterbatch and a preparation method thereof, which solves the problems of high energy consumption, serious pollution and incompatibility of physical properties of polymers in the conventional mechanical mixing in the prior art, improves production efficiency and reduces energy consumption. The specific process comprises dissolving solid synthetic rubber in an organic solvent to obtain liquid synthetic latex; immersing carbon material in an aqueous solution of a small molecule solvent to obtain carbon material slurry; adding the liquid synthetic latex, carbon material slurry and natural latex to a composite reaction chamber in a spraying manner for high-speed mixing to obtain a mixed solution; adding a flocculant to the mixed solution, stirring until flocculation, heating, drying and granulating to obtain a wet masterbatch. The method has simple process, high production efficiency and low equipment energy consumption, and meets the requirements of "green production".

The application discloses a mechanical hole-forming method of a horizontal cantilever rectangular anti-slide pile with an added shoulder, and comprises the following steps: sequentially arranging a slag body processing mechanism, a vertical hydraulic assembly and a multifunctional drilling assembly on a drilling machine from top to bottom; controlling a cylindrical drilling assembly in the multifunctional drilling assembly on a horizontal plane to drill and dig a stratum downwards to a top design elevation of the added shoulder hole; controlling a vertical hydraulic cylinder to drive the multifunctional drilling assembly to continue drilling and digging the stratum downwards to a design depth of the horizontal cantilever pile hole; the piston rod of the horizontal hydraulic cylinder is elongated to drive the multifunctional drilling assembly to move laterally, and the piston rod of the vertical hydraulic cylinder is elongated to drive the multifunctional drilling assembly to move downwards to drill and dig the stratum to form the added shoulder hole; controlling the horizontal hydraulic cylinder to drive a cylindrical drilling assembly on a vertical plane in the multifunctional drilling assembly to drill and dig the horizontal cantilever pile hole outwardly; and continuing to control the cylindrical drilling assembly on the horizontal plane in the multifunctional drilling assembly to drill and dig the stratum downwards to a design depth of the rectangular pile hole.

The invention discloses an anti-scratch water-based dual-curing ultra-matte coating and a preparation method and application thereof, and the anti-scratch water-based dual-curing ultra-matte coating is composed of a component A and a component B. The component A is prepared from the following raw materials in parts by weight: 60 to 70 parts of water-based dual-curing polyurethane acrylate resin, 10 to 15 parts of delustering agent, 3 to 4 parts of photoinitiator, 2 to 3 parts of hydroxyl modified polysiloxane emulsion and 5 to 20 parts of water; the delustering agent is a nano silicon dioxide aqueous dispersion. According to the matt paint, the appearance defects of poor surface scratch resistance, poor permeability, fogging, whitening, no friction resistance, brightening and the like of a coating after a large amount of matting agent is added into a matt paint product on the market at present are overcome.

The present invention relates to the technical field of screening devices, and specifically to a vibrating screening device for heavy-duty screens, comprising a frame, a walking mechanism, a chain plate feeder and a screen box, wherein the walking mechanism is installed at the bottom of the frame, the chain plate feeder is fixedly installed on the frame, the screen box is located on one side of the chain plate feeder, a receiving assembly is arranged in the screen box, the receiving assembly comprises a buffer module and a cleaning module, the buffer module and the cleaning module cooperate with each other to improve the screening efficiency, the vibrating screening device for heavy-duty screens can buffer large stones through the receiving assembly, reduce the noise and dust generated when large stones fall on the grate screening element, and optimize the construction environment, and on the other hand, can increase the distance between small stones and large stones, avoid being squeezed by large stones and stuck in the screening slot, resulting in blockage of the screening slot, and can be matched with a crushing assembly to crush stones that may be blocked, dredge the screening slot, and thus improve the screening efficiency.

The utility model relates to the technical field of building equipment, in particular to an assembly type cement bearing column structure which is characterized in that a base is arranged at the upper end of a bottom plate, a bottom groove is formed in the base, a plurality of grooves are formed in the bottom of the bottom groove, and the bottom ends of a plurality of steel bar bodies are inserted into the specified grooves; the protective sleeve is located above the base, positioning holes are formed in the four corners of the base, and a plurality of positioning blocks inserted into the positioning holes are arranged at the lower end of the protective sleeve. An assembly type design is adopted, a plurality of procedures of traditional on-site cement bearing column manufacturing are converted into prefabrication and assembly, tedious operations such as on-site formwork erecting and reinforcing steel bar binding are reduced, the construction efficiency is improved, and the construction cost is reduced. And compared with a traditional mode, the construction speed can be greatly increased.

The utility model relates to a prefabricated aerated concrete block wall of a pre-buried electric box, which comprises standard blocks and prefabricated blocks, the standard blocks and the prefabricated blocks are prefabricated autoclaved aerated concrete blocks, and the standard blocks have the specification size of 600mm * 200mm * 100mm; the prefabricated building block is provided with an electric box mounting hole, the prefabricated building block is provided with an upper groove which is positioned above the electric box mounting hole and is convenient for a pipeline to pass through, the prefabricated building block is provided with a lower groove which is positioned below the electric box mounting hole and is convenient for the pipeline to pass through, and the upper groove, the electric box mounting hole and the lower groove are communicated; and the standard building blocks and the prefabricated building blocks are piled up to form a wall body. Prefabricated building blocks with electric box boxes and pipeline reserved holes consistent in size are used as one part of a masonry and are built in a wall body according to positioning. The vibration of post-grooving construction in a traditional method is avoided, and the quality problems of cracks, looseness of a masonry bonding layer and the like are reduced, so that the integrity of the masonry wall and the quality of subsequent plastering engineering are guaranteed.

The present application relates to a kind of lime-soil compaction pile construction system for collapsible loess area, before construction, good technology, material, equipment and site preparation, such as familiar drawing, prepare soil and lime, debug hole and ramming equipment, level site and surveying and setting out etc..During construction, first carry out test pile to determine parameters, large-scale hole formation follows specific sequence and strictly controls pile diameter, perpendicularity etc.;Pile formation first clean bottom ram, then layered packing ramming, accurate operation by control system;After pile formation, do well maintenance.Quality detection uses low-strain dynamic penetration method to detect pile integrity, plate load test to detect composite foundation bearing capacity.The method is applied to a certain commercial complex project, construction is smooth, hole formation and pile formation quality meet the standards, efficiency is improved, construction period is shortened.

The invention belongs to the technical field of pipeline inner wall spraying equipment, and relates to a full-automatic spraying equipment device which comprises a movable base, an adjustable pipeline clamping mechanism, a rotary spraying executing mechanism, an automatic feeding system and an intelligent electric control unit. The adjustable pipeline clamping mechanism can achieve automatic centering and clamping of pipelines with different pipe diameters, and the rotary spraying executing mechanism is of a servo rotation and electric telescopic combined structure and is matched with a radial fine adjustment spraying head and a plurality of sets of circumferential fan-shaped nozzles to achieve 360-degree even dead-corner-free spraying of the inner walls of the pipelines. The automatic feeding system has the functions of pressurization, flow regulation and leakage prevention, and the intelligent electric control unit achieves one-key automatic spraying, constant-speed feeding, automatic returning and sudden stop protection. The pipeline inner wall spraying device is high in adaptability, uniform in spraying, high in automation degree and convenient to move, the problems that traditional equipment is single in pipe diameter adaptation, unstable in clamping, uneven in coating and high in manual dependence degree are effectively solved, and the spraying efficiency and quality of the pipeline inner wall are remarkably improved.

The invention discloses a large-span prestressed concrete double-T plate pouring machine, and relates to the technical field of double-T plate pouring, the large-span prestressed concrete double-T plate pouring machine comprises a mold body, the upper end face of the mold body is fixedly connected with a mounting frame, the mounting frame is horizontally and slidably connected with a pouring funnel, the lower end face of the pouring funnel is fixedly connected with a pouring pipe, and the lower end of the outer surface of the pouring pipe is fixedly connected with a mounting plate; a through groove is formed in the mounting plate, and an automatic concrete flattening mechanism is arranged on the mounting plate, so that concrete can be automatically and uniformly spread in the mold body in the process of pouring the concrete into the mold body, and uniform distribution of the concrete in the mold body can be ensured; the problems of uneven thickness and uneven surface of concrete caused by improper manual operation are avoided, so that the overall performance quality and appearance of the double-T plate are improved, the labor intensity of workers can be relieved, the risk of misoperation is reduced, the construction process is easier, and the safety of the workers in the construction process is improved.

The utility model discloses a material conveying device for building decoration, which comprises a material conveying mechanism and a limiting mechanism, the limiting mechanism is fixedly connected to the front side of the top of the material conveying mechanism, the limiting mechanism comprises a limiting box, and the bottom of the inner cavity of the limiting box is fixedly connected with a motor assembly. The output end of the motor assembly is fixedly connected with a gear, toothed plates are arranged on the front face and the back face of the gear, the inner sides of the toothed plates are meshed with the gear, the outer sides of the toothed plates are slidably connected with the inner wall of the limiting box, and the outer sides of the toothed plates are fixedly connected with connecting plates. According to the material conveying device, the phenomenon that materials cannot be limited in the prior art is changed, the special-shaped limiting rods are adopted to drive the limiting vertical plates to move towards the inner side, the limiting vertical plates conduct limiting treatment on the conveying box, the inclination phenomenon cannot occur when the conveying box runs to a bumpy road section, and the phenomenon that the conveyed materials fall off cannot occur.

The utility model discloses a prefabricated concrete hollow stand column type inspection pit structure. The inspection pit comprises a concrete cushion layer, a foundation beam, a waterproof bottom plate, a zero layer plate, anchor bars, prefabricated hollow stand columns and a track which are sequentially arranged from bottom to top. The concrete cushion is arranged at the bottommost part of the inspection pit, the foundation beams are poured on the concrete cushion, and the waterproof bottom plate is arranged between the foundation beams; a rail is mounted at the top of the prefabricated hollow stand column; anchor bars are reserved at the bottoms of the prefabricated hollow stand columns and used for fixedly connecting the prefabricated hollow stand columns and the zero-layer plate and supported by the foundation beam. Compared with the prior art, the foundation beam structure is arranged, the top face of the foundation beam is the same as the adjacent site in elevation, use of construction machinery, binding of zero-layer plates and transporting and hoisting of prefabricated columns are facilitated, the construction image, environment and quality are improved, the working procedures of pre-burying steel sleeves in a prefabricated hollow stand column factory and screwing in anchoring steel bars on site are omitted, and the construction cost is reduced. And the construction period is shortened, the steel sleeve cost is saved, and more energy conservation and environmental protection are achieved.

The invention discloses a water-soluble resin with a flame-retardant function and a preparation method thereof. The water-soluble resin is prepared from the following raw materials in parts by weight: 400-500g of flax fatty acid; 200 to 240 g of trimethylolpropane; 25 g to 30 g of trimellitic anhydride; 0.02%-0.04% of a drier; 180 to 200 g of phthalic anhydride; 600 to 680 g of ethylene glycol monobutyl ether; 40-50 g of maleic anhydride, 200-300 parts of dehydrated castor oil fatty acid, and 5-15 parts of a preservative. According to the water-soluble resin with the flame-retardant function and the preparation method thereof, in synthesis of the resin, the formula is more reasonable, fusion with the flame retardant is more stable, silicon tetrachloride which is a byproduct of polycrystalline silicon is used in synthesis, so that the prepared flame retardant is higher in flame-retardant efficiency and more obvious in flame-retardant effect, the preparation process is simplified in the preparation process, and the production cost is reduced. Meanwhile, through a reasonable formula and a preparation process, the prepared resin is small in smell, good in constructability, excellent in leveling property, easy to brush and spray, and beneficial to improving the construction environment and human health.

The utility model provides a kind of concrete pavement brick automation production line, and concrete pavement brick automation production line includes the product forming production line, transfer and transport production line, finished product palletizing production line and soaking curing production line in series successively;Product forming production line includes batching machine, mixer, cement metering storage tank, automatic forming machine and crusher;Transfer and transport production line includes adapter plate machine, laminating machine, first sub-mother ferry car, steel rail;Finished product palletizing production line includes second sub-mother ferry car and stacker;Soaking curing production line, including curing pool and automatic elevator installed in the curing pool.The utility model carries out optimization improvement to four processes in the concrete pavement brick production process, effectively integrates series use of mechanical automation equipment, creates a concrete pavement brick automation production line, and achieves good production effect: the concrete pavement brick automation production line realizes the automation production of entire technological process.

An outdoor sand blasting and spraying operation construction vehicle comprises a vehicle head (1) and a compartment (2), an engine (3) and a generator (4) are arranged in the vehicle head (1), and a distribution box (6), a spraying machine (7), a slurry barrel (8), an air compressor (9), an air storage tank (10), a sand blasting machine (11), a sand bin (14) and a recovery bin (15) are sequentially arranged in the compartment (2). Wherein the distribution box (6) is electrically connected with the generator (4), the slurry barrel (8) is connected with the spraying machine (7) through a pipeline, and the air compressor (9), the air storage tank (10) and the sand blasting machine (11) are sequentially connected through pipelines; the sand bin (14) is connected with the sand blasting machine (11) through a sand suction pipeline (17); and a sand sucker (18) is arranged on the recovery bin (15). The construction vehicle can carry out continuous construction operation outdoors, and therefore the requirement for on-site spraying of protective coatings of metal parts which are not prone to being detached is met.