150results about How to "Easy to use in construction" patented technology

The invention discloses an environment freeze protection stone paint, which comprises the following raw material components according to the parts by weight: 0.1-5 of fibrin aqueous solution of 1-4% concentration, 0.8-1.2 of glycol, 50-70 of colored sand of 41-80 mesh, 5-25 of colored sand of 81-120, 17-23 of KE025 acrylic emulsion, 0.6-0.9 of alcohol ester-12 addition agent, 0.02-0.06 of foam killer, 0.01-0.1 of thickness agent and 0.02-0.06 of neutralizing agent. Meanwhile, the invention also discloses a preparation method for the stone paint. The stone paint has the environment and freeze protection performance, provides powerful guarantee for being suitable for winter construction, in particular to various severe conditions of winter construction in the northern area of our country.

The invention discloses an automobile exhaust degenerating material as well as the application thereof, and relates to an environment-friendly material as well as the application thereof. The invention solves the problems existing in prior automobile exhaust degenerating material that the application scope is small, the cost is high, and the manufacture method is complicate. The automobile exhaust degenerating material of the invention is composed of a nanometer titanium dioxide photocatalyst and a binder by the weight ratio of (1-2):20. The automobile exhaust degenerating material of the invention is used for degrading the automobile exhaust road surface, wherein, the application method of the automobile exhaust degenerating material is of a spraying method or a spreading method. The automobile exhaust degenerating material has the advantages of strong practicality, simple process, easy construction application, wide application scope, less material dosage per unit area and low cost. The efficiency in degrading toxic gases of HC and CO in the automobile exhaust can reach higher than 70 percent, the automobile exhaust degenerating material of the invention can be recycled, and the degradation degree to toxic gases after the automobile exhaust road surface degraded by the invention is flushed by rain can be still maintained above 60 percent.

The invention relates to a novel modified emulsified paraffin concrete curing agent. Aiming at overcoming the defects that the existing concrete curing agent cannot reach the industrial standard on building material in terms of the water retention property and is unfavorable for environmental protection, the price is high and the decoration at later stage is also affected, the following technical proposal is provided: the curing agent is mixed with the following materials and water: 10-20% of vinyl acetate-ethene high molecular polymer emulsion, 0-5% of silicone resin modified acrylic polymer emulsion, 50-75% of paraffin emulsion, 0.1-0.5% of colloidal dispersing agent of the emulsified paraffin for stabilizing the emulsion state and 0.05-0.02% of special defoamer for emulsion. The invention has the beneficial effects that: the chemical curing method which is adopted for retaining water is an innovation for the traditional curing method; compared with the prior art, the method is labor-saving, time-saving and water-saving and is convenient to operate, can improve the film formation ability and the sealing ability of the emulsified paraffin emulsion, and can improve the bonding and absorbing capacity of the emulsified paraffin emulsion on the concrete surface, which leads the effective water retention rate of the coating film to reach more than 90%.

The invention relates to a siliceous heat-insulation composite material for a wall, which comprises base materials and water. The base materials mainly comprise closed-cell expanded perlite, cement, building gypsum, inorganic mineral substance fibers, high-viscosity attapulgite clay, redispersible rubber powder, hydroxypropyl methyl cellulose auxiliaries and a water repellent, wherein the inorganic mineral substance fibers comprise alumina silicate fibers, brucite fibers, mineral cotton fibers and the like, and when the material is used, the weight ratio of the base materials to the water is 1:1.2-1.3. The material as an amorphous powdery heat-insulation material is excellent in energy conservation, heat insulation, sound absorption, flame retardance reaching level A1, fireproofing, seismic resistance, crack control, flexibility and weatherability, does not chemically react with the wall, is high in strength and ageing resistance, avoids deformation, crack, hollowing, shedding and is the same as the wall in service life in use. The material is green, environment-friendly and non-toxic, is applicable to heat insulation of an inner wall and an outer wall made of various wall base materials, a splitting wall and heat-insulation energy-saving projects such as roofs, basements, garages, stairs, corridors, fire-fighting accesses and the like.

The invention provides a multilayer fabricated concrete wallboard structure system. The multilayer fabricated concrete wallboard structure system comprises a foundation, prefabricated wallboards and post-tensioned unbonded prestressed bars. The prefabricated wallboards are arranged on the foundation, at least two prefabricated wallboards are vertically spliced, and the prefabricated wallboards and the foundation are connected into a whole through the unbonded prestressed bars. One end of each unbonded prestressed bar is anchored in the foundation, and after being connected with the prefabricated wallboards in series, the unbonded prestressed bars are anchored to the ends of the prefabricated wallboards. Horizontal seam connecting pieces are arranged at the corners of the prefabricated wallboards, and the vertically-spliced prefabricated wallboards are connected and positioned through the horizontal seam connecting pieces. According to the multilayer fabricated concrete wallboard structure system, dry construction is adopted, fabrication accuracy and fabrication speed are high, and the requirement for building industrialization development is met. Because the multilayer fabricated concrete wallboard structure system has high capacity for dissipating earthquake energy, when an earthquake hazard happens, the requirement that the multilayer fabricated concrete wallboard structure system is not damaged in a small earthquake, can be recovered in a medium earthquake and does not collapse in a strong earthquake can be met, and the safety level of a multilayer fabricated building can be substantially improved.

A silicone composition is disclosed. The composition includes 20-80 parts by weight of organic silicone, 2-60 parts by weight of MQ resin, 1-20 parts by weight of hydrogen-containing silicone and an effective amount of a hydrosilylation catalyst and a hydrosilylation inhibitor. The invention also discloses a preparing method of the silicone composition, a method of using the silicone composition for encapsulating electronic elements such as pressure-sensitive resistors, ceramic capacitors and thermistors, and a method of using the silicone composition for embedding electronic elements such as capacitors. The composition has a long active period, and can be stably stored for long term at 100 DEG C or below. The composition after encapsulating and embedding the electronic elements has excellent flexibility and resistance to cold and hot alternation, and has good moisture resistance and resistance to large-current impact.

The invention discloses fluorosilicone modified acrylic resin as well as a preparation method and an application thereof. The fluorine-silicon modified acrylic resin is prepared from the following components: methacrylate monomers, fluorine-containing acrylate monomers, acrylate-based silicone oil, allyl silicone oil, a polymerized active silane coupling agent, methacrylic acid, hydroxyl-containing active crosslinking monomers, glycidyl methacrylate, trimethylolpropane trimethacrylate, an initiator, a chain transfer agent and a solvent. The fluorine-containing acrylate monomer is composed of aC2-C3 short-chain fluorine-containing alkyl acrylate monomer and a C10-C12 long-chain fluorine-containing alkyl acrylate monomer. The fluorine-silicon modified acrylic resin prepared by the inventionhas the characteristic of high low viscosity, is convenient to construct and use, and reduces the generation of VOC. The coating prepared from the modified acrylic resin has the characteristics of high impact-resistant self-repairing function, icing prevention, low surface energy, hydrophobicity, oleophobicity, stain resistance, high and low temperature resistance and the like.

The invention provides single component room temperature curing epoxy construction glue and belongs to the technical field of construction adhesive. The single component room temperature curing epoxy construction glue is formed by the following materials, by weight, 80-100 parts of epoxy resin, 5-25 parts of diluent, 10-20 parts of curing agent, 3.0-5.0 parts of coupling agent, 0.5-2.0 parts of accelerant, and 1.0-8.0 parts of filler. Compared with two-component epoxy adhesive in the prior art, the single component room temperature curing epoxy construction glue has the advantages that raw materials are wide in source and low in price; convenience is achieved in the process of construction and use, the phenomenon of waste like the two-component epoxy adhesive can not happen; and the single component room temperature curing epoxy construction glue can be cured at room temperature, and bonding requirements for stones, wood, concrete, metal, ceramics, glass and the like can be met.

The invention discloses a permeable terrace brick manufacturing method. The method comprises the steps of weighing sands with different particle sizes and different proportions; stirring the weighed sand, spraying mixed adhesives, and conducting stirring continuously till the adhesives are evenly mixed with the sand; pouring the sand which is obtained after even mixing and contains the adhesives into a floor tile mold, compacting the sand to be flat till solidification, and conducting demolding. Terrace bricks manufactured with the method are light and high in crush resistance, bending resistance and abrasion resistance, and rainwater can permeate through the terrace bricks quickly.

The invention discloses a butyl rubber reactive bonding layer used for a pre-paving reactive-bonding waterproofing coiled material, a preparation method thereof, and the pre-paving reactive-bonding waterproofing coiled material, and relates to the technical field of high-molecular pre-pavement materials. The butyl rubber reactive bonding layer is mainly produced from: 100 parts of raw rubber, 9.5-15.5 parts of a linear tackifying resin containing terminal hydroxyl group structure, and 12.5-19.5 parts of active filler comprising active silicon dioxide and aluminum oxide. The reactive bonding layer solves the defects that a bonding layer of a waterproofing coiled material in the prior art is liable to flow, deform and wrinkle when being heated, is brittle at low temperature, is free of sticking feet only if a single anti-sticking layer or insulation layer exists, and is poor in stripping strength with post-poured concreted. The butyl rubber reactive bonding layer can form permanent chemical bonds with concrete, so that a real skin-type water-proofing structure is formed between the pre-paved high-molecular waterproofing coiled material and the concrete, and the bonding layer is freeof sticking feet and allows people to walk thereon without coverage by sand and coating layers. In addition, the reactive bonding layer has good low temperature resistance and thermal stability.

The invention relates to a modified polyolefin material for asphalt soft package which comprises polypropylene, polyethylene, polyethylene vinyl acetate copolymer, EPT rubber, and octadecanoic acid, the preparing process comprises the steps of, blending, granulating, blowing film, sealing, three-layer co-squeezing, and blowing film shaping.

The invention discloses an aluminum foil tape with a lining film and a manufacturing method thereof, relates to a thin film-shaped or slice-shaped adhesive and provides the aluminum foil tape with the lining film which has the advantages of wide using range, easy construction and use, energy conservation, environmental friendliness, relatively high resource utilization rate, resource waste reducing and relatively low cost, and the manufacturing method thereof. The aluminum foil tape with the lining film is provided with an aluminum foil layer and a release film layer, wherein an adhesive layer is coated between the aluminum foil layer and the release film layer. The method comprises the following steps of: firstly, coating a solvent silicone oil or a solvent-free silicone oil on the surface of the thin film to obtain the release film layer; and secondly, coating the adhesive layer on the release film layer and compounding the release film layer on the aluminum foil layer by coating equipment, or coating the adhesive layer on the aluminum foil layer and then compounding the aluminum foil layer with the release film layer to obtain the aluminum foil tape with the lining film. The aluminum foil tape can be widely used for adhering refrigerators, freezers, air conditioners and building heat-insulating pipelines and for the products which need to be adhered by the aluminum foil tapes.

The invention discloses a drawing process of a conical ductile cast-iron pipe cast by devices, including a sand mold core, a cast-iron core frame, pipe-drawing calipers, a casting mold and a centrifugal pipe-casting machine. The drawing process comprises the following steps: firstly, putting the dotted casting mold in the centrifugal pipe-casting machine; leading cooling water to the outer wall of the casting mold; mounting the casting mold in the centrifugal pipe-casting machine; mounting the sand mold core on the cast-iron core frame; arranging the cast-iron core frame in the bearing port of the casting mold; pouring molten iron in the fan-shaped ladle of the centrifugal pipe-casting machine; then, starting the automatic pipe-drawing system of the centrifugal pipe-casting machine; drawing to mold; and drawing out the conical ductile cast-iron pipe with the pipe-drawing calipers. In the pipe-drawing process, the drawing speed curve of the automatic pipe-drawing system of the centrifugal pipe-casting machine adopts segmental control, and the rotating speed of a casting rotating DC (Direct Current) motor gradually increases and ranges from 800r / min to 1700r / min. The process enables the pipe body of the conical ductile cast-iron pipe to have even wall thickness and internal compact structure and accord with the use performance requirements.

The invention discloses a prestressed rib connecting and tensioning device and method. The device integrates connection, tensioning and prestress adjustment of a fractured prestressed rib and is most suitable for connection and prestress tensioning of prestressed ribs in bridge structures, wherein the prestressed ribs are partially fractured due to corrosion. A connecting device is composed of two sleeves and quite simple; a tensioning device is composed of a base, a bevel gear and ratchet assembly, a ratchet cap, a four-way pawl, a stressing rod, a nut, a fan-shaped bevel gear, a transmission ratchet and a two-way pawl. According to the prestressed rib connecting and tensioning device and method, centering connection and prestress tensioning can be conducted on the fractured stressed ribs without a jack, operation is convenient, and the safety is high; the tensioning device needs quite small operation space, can be fully dismantled and reused and is economical and environmentally friendly; prestress loss caused by anchorage deformation does not occur in the tensioning process, the prestress value can be adjusted to be higher or lower, and the precision is quite high; and the prestressed rib connecting and tensioning device can be widely applied to the field of prestressed concrete bridge maintenance and reinforcement.

The invention relates to the technical field of concrete and particularly relates to a preparation process of anti-cracking concrete. The preparation process comprises the following steps: (1) designing a concrete ratio; (2) uniformly stirring a mixture, wherein the stirring temperature is 15-40 DEG C; (3) pouring concrete: alternatively injecting the concrete and a high-strength steel-imitated fiber net into a template, and carrying out cement plastering treatment in the process; and (4) cutting and polishing the concrete: polishing by adopting a water grinding method, and adding a polishing medium. The preparation method of the anti-cracking concrete, provided by the invention, has the characteristics of easiness of obtaining raw materials, low cost, good performance and the like; all components are reasonably matched, and a high admixture use amount ratio and a low gel material use amount ratio are used as main characteristics; and the concrete which has good workability, high strength, good anti-cracking performance, good anti-seepage performance and long service life and is suitable for a seabed working condition is finally formed.

The invention discloses an environment-friendly chloroprene adhesive, which is characterized by consisting of the following ingredients in parts by weight: 100 parts of chloroprene rubber (CR), 40-90parts of resin, 0-2 parts of a catalyst, 0-2 parts of an anti-aging agent, 4-10 parts of magnesium oxide, 2-8 parts of zinc oxide, 0-1 part of an accelerant, 0-10 parts of filler and 350-55 parts of amixed solvent. The invention further discloses a preparation method for the environment-friendly chloroprene adhesive. Processing technologies of mixing and resin pre-reaction are adopted, the operation is simple, the performance is stable, and a product has no de-lamination after being placed at a constant temperature for a long time. Stripping strength for butylbenzene rubber floors and wood materials can achieve material destruction. The adhesive consists of various high polymer ingredients, various tackifying resin and various solvents with different properties and structures, and can beused for the non-structural adhesion of most materials including plastic, rubber, fibers, the wood materials, ceramic, glass, metal and the like.

The invention provides a preparation method of low-acid-value low-viscosity dimer acid type polyamide hot melt adhesive, belonging to the technical field of amidation polymerization in oil chemistry. The method comprises the following steps of: carrying out acylation polymerization reaction in the presence of a catalyst and a deforming agent under the protection of nitrogen based on long-chain dimer acid of binary acid and diamine as main raw materials; and further carrying out vacuum dehydration and demonomerization to obtain dimer acid type polyamide hot melt adhesives of different specifications, wherein the acid value is lower than 2mgKOH / g, the amine value is lower than 10mgKOH / g, and the viscosity is 300-5,000cp. The preparation method provided by the invention is a new way of comprehensive utilization of dimer acid, and has the characteristics of easy technical operation, high product yield, stable product quality and low operation cost.

A plastic thin-wall box includes upper plate, sidewalls and lower plate, all of which combines a close cavity thin-wall box. The said thin-wall box features that upper plate, sidewalls and lower plate which are all assembled by plastic plate; the assembled position are contacted into a whole by connecting parts; the plastic plate has reinforcing part. It is simple structure, easy construction, lost cost, etc. The present invention is suitable for various cast-in-place reinforced concrete hollow floor slab, roofing, base slab, wall and open web bridge, especially cast-in-place reinforced concrete hollow no-beam floor slab.

The invention discloses a preparation method of a rare earth element co-doped nano titanium dioxide photocatalyst. The rare earth element is embedded into self-doped titanium dioxide to obtain the rare earth element co-doped nano titanium dioxide photocatalyst with certain morphology. The preparation method is simple and low at cost, and uses the photoelectric characteristics of rare earth element to prepare the titanium dioxide rare earth element co-doped nano titanium dioxide photocatalyst, which has the advantages of controllable doping, good dispersion, efficient energy storage and high catalytic activity. The purpose of the invention is to provide a simple and low-cost preparation method, which uses self-doped black TiO2 as the base and sets the rare earth element co-doping as customized purpose; and the method can prepare the rare earth element co-doped nano titanium dioxide photocatalyst with high catalytic activity.

The invention relates to a radial horizontal well drilling device and method. The device comprises a suspension feeding part, a dynamic supercharging part, a continuous drilling part and a sliding sealing part; the suspension feeding part can be movably arranged at a wellhead of a vertical shaft with the top sealed, the top of the dynamic supercharging part can be detachably connected to the suspension feeding part, the bottom of the dynamic supercharging part is communicated with the continuous drilling part with the flexible drilling function, and the dynamic supercharging part can increasethe pressure of fluid entering the continuous drilling part; the continuous drilling part is used for drilling a radial horizontal well, and the sliding sealing part can slidably seal and isolate theupper space of the continuous drilling part. According to the radial horizontal well drilling device and method, a discontinuous oil tube drilling operation mode adopted, the problems caused by operation of the continuous oil tube operation machine are avoided, the device is simple in structure and low in cost, the horizontal well construction process can be safely and efficiently completed, and wider application of the horizontal well technology can be obtained conveniently.

The invention relates to the technical field of waterproof roll production, in particular to a waterproof roll after-rolling automatic bundling device which comprises a connecting assembly, the upper surface of the connecting assembly is slidably connected with a cleaning assembly, the right side of the connecting assembly is fixedly connected with an adjusting assembly, and the top end of the adjusting assembly is in bolted connection with a bundling assembly. The end, away from the adjusting assembly, of the bundling assembly is slidably connected with a reinforcing assembly, and the rolled waterproof coiled material can be always kept in a tightened state after the rolled waterproof coiled material is broken through the arrangement of an arc-shaped reinforcing plate, so that on one hand, it can be guaranteed that the bundling work is conducted smoothly; and on the other hand, follow-up construction use is facilitated, by arranging an arc-shaped reinforcing plate and an inclined face of an edge sealing wheel, the edge and the middle of a binding tape can be reinforced at the same time after the waterproof roll is bound, and the situation that the edge of the binding tape warps after the binding tape is bound is avoided.

The invention relates to a mould case structural member, which comprises basin-shaped moulds (1), wherein the basin-shaped moulds (1) are an integral structural member. The member is characterized inthat basin openings of the two basin-shaped moulds (1) are relatively buckled, and the buckling positions of the two opposite basin openings are jointed by a ridge keel (2) to form an integral mould case structural member. Therefore, the mould case structural member improves various performances of the splicing position of the basin openings of the basin-shaped moulds obviously, and can effectively reduce the damage rate of the mould case structural member and reduce the cost; and in addition, the ridge keel and the basin-shaped moulds are subjected to tight treatment, and after being appliedto cast-in-situ reinforced concrete floors, the mould case structural member can prevent the entry of cast-in-situ concrete, moisture and air bubbles effectively, improve the integral quality of the cast-in-situ reinforced concrete floors and reduce phenomena of hollowing and cracking, is suitable to be used in hollow floors, roofs, wall bodies, foundation slabs and hollow bridges of various kindsof cast-in-situ reinforced concrete or prestressed reinforced concrete, and is particularly suitable to be used in hollow beamless floors.

The invention provides an intelligent environmental protection construction crusher. The intelligent environmental protection construction crusher includes a crusher frame, an intelligent control switch, supporting legs, a crushing powder diversion pipe, a crushing motor, a driving belt wheel, a double groove plane belt wheel, a driving wheel shaft, a driving broken sawtooth gear, a single grooveplane belt wheel, a driven wheel shaft, a driven crushing sawtooth gear, a V-shaped transmission belt, a V belt and a stone anti-splash inlet adjusting baffle structure. According to the intelligent environmental protection construction crusher, through the arrangement of a stone anti-splash baffle, an inlet adjustable plate, a fixed seat, a stone to be crushed guide pipe, a connecting seat and aninlet size adjusting rod, avoiding the problem of stone splashing when crushing is facilitated, the personal safety of operators is ensured, by stretching and adjusting the inlet size adjusting rod,the inlet adjustable plate can act inside the fixed seat, and the inlet size can be changed; and the stone anti-splash baffle plays a side protection role to avoid stone splashing, and the stone diversion can be carried out through the stone to be crushed guide pipe so as to facilitate the work of crushing stones

The invention discloses a coarse sand layer sieve drying equipment for building, which comprises a frame, a drying tank body, a secondary screening net, a primary screening net and a heat exchange air duct. The drying tank body is installed on the frame On the top, the middle part of the top of the drying tank is connected to the adding pipe, and the top of the adding pipe is connected to the quantitative adding valve. The upper end of the quantitative adding valve is equipped with a sand adding bucket, and the inside of the sand adding bucket is set as an adding tank; the drying tank below the adding pipe The body is equipped with a first-level screen, and the drying tank below the first-level screen is equipped with a second-level screen; it is convenient to screen the sand added by the adding pipe step by step, and the blanking vibration reed is vibrated by the impact of the sand. Improve the efficiency and effect of sand screening, save the installation of vibrating motors, reduce production costs, can obtain sand with different particle sizes and is conducive to construction use, improve the waste heat utilization efficiency of exhaust air, reduce energy consumption, and reduce sand The cost of drying improves the efficiency and effect of sand drying.

The invention discloses an excitant for an inferior lime-cement mixed material. The excitant is characterized by comprising the following materials in percentage by weight: 25 to 35% of diethanol amine, 1 to 5% of calcium lignosulphonate, 4 to 8% of alkylbenzene polymerase sodium sulfonate, 8 to 12% of sugar calcium, 2 to 4% of barium sulfate, 2 to 6% of nanometer titanium oxide, and the balance of water. The excitant has the main advantages as follows: 1, 10 to 25% of the output per cement mill is increased, and 10 to 20% of electricity consumption in grinding is saved; 2, nearly 25% of strength of the cement in each stage is increased, and 8 to 15% of the amount of used low-activity cement mixture is increased while the strength of the cement in each stage is remained; 3, about 40 minutes in initial set and final set of the cement is reduced, and the benefit is provided for the construction and use of the cement; and 4, about **** of cement is improved based on the comprehensive economic benefit.

The invention provides a soil passivator, a preparation method thereof and application of the soil passivator in farmland heavy metal pollution remediation, and relates to farmland heavy metal pollution soil remediation. The passivator is prepared from the following raw materials: natural zeolite, ferrous sulfate and brucite, the use amount of the ferrous sulfate is 10%-50% of the mass of the natural zeolite, the use amount of the brucite is 10%-40% of the mass of the natural zeolite, and the passivator can be obtained by uniformly mixing all the components. The passivator nt is simple in preparation method, natural in raw material source, free of secondary pollution to soil and convenient to construct, farmland fallow is not needed during application, the passivator is applied in leisureseasons, and normal agricultural planting is not affected; the passivator provided by the invention is low in price and obvious in remediation effect, can effectively reduce the content of heavy metals in crops and the content of available heavy metals in soil, and has a good application prospect in the aspect of remediation of large-scale heavy metal contaminated farmlands.

The invention belongs to the technical field of ink, and particularly relates to water-based conductive ink and a preparation method thereof. The water-based conductive ink comprises the following components in parts by weight: 50-90 parts of silver-coated copper powder, 5-30 parts of modified water-based acrylic resin, 1-5 parts of water-based amino resin, 0.5-2 parts of a neutralizer, 0-6 parts of a solvent, 0.2-5 parts of a defoaming agent, 0.2-5 parts of a wetting agent, 0.2-5 parts of a dispersing agent and 0-10 parts of an anti-blocking agent. The water-based conductive ink provided by the invention can effectively weaken the electromigration phenomenon, and a paint film is good in stability, low in resistance, less in volatile organic compounds, environment-friendly, non-flammable and non-combustible, and green and environment-friendly; and the ink is convenient for construction and application, can be printed on a polyester substrate or various papers, has good paint film hardness and adhesion performance, and is not easy to fall off.

The invention relates to the technical field of road construction, and in particular relates to a warning board for road construction. The warning board for road construction comprises a base, whereinslide bars are symmetrically arranged at the upper end of the base; sliding plates are connected on the outer sides of the slide bars in a sleeving manner; the warning board is arranged at the upperends of the sliding plates; shaft sleeves are arranged at the lower ends of the sliding plates; a first screw is arranged in each shaft sleeve; a first swivel nut is connected to the upper end of thebase in a locking manner; the end, far from the shaft sleeve, of the first screw penetrates through the first swivel nut and is connected to a second gear; supporting legs are symmetrically arranged at the lower end of the base; a first gear engaged to the second gear is arranged in the base; and the lower end of the first gear penetrates through the base and is connected to a first rotary disc through a second connecting rod. Compared with the prior art, the device moves and is fixed after moving, and the height of the warning board is adjusted, so that the warning board is simple in structure, is used for road construction conveniently, and is worth being popularized.

The invention discloses an improved central tube type optical cable which comprises an optical cable sheath (1). Two or more than two loose tubes (2) in different colors are parallelly arranged in the optical cable sheath (1), optical fibers (3) in different colors are arranged in each loose tube (2), first water-blocking substances (4) are filled in the loose tubes (2) which are longitudinally wrapped by a composite metal belt (5), second water-blocking substances (6) are filled among the loose tubes (2) and the composite metal belt (5), and reinforcers (7) are parallelly arranged in the optical cable sheath (1). The improved central tube type optical cable solves the technical problems during production of central tube type optical cables with more than 12 cores in the prior art, and is simple in structure and convenient to manufacture.

The invention discloses stirring equipment for a coating. A stirring main shaft drives horizontal plates and stirring outer-extension parts to stir various raw materials in a stirring barrel for crushing, dispersing and mixing various raw materials, and each stirring outer-extension part includes vertical pipes and transverse pipes; and plate drug outlet holes and part drug outlet holes can supplement mixed raw materials or dispersed drugs on line; heat supply devices can provide heat and horizontal stirring; and a temperature detecting sensor can monitor the temperature environment in the mixing barrel. The equipment provided by the invention not only has a stronger stirring function, but also can be used for heat stirring, the uniformity of the mixture is better, and the stability is higher; and the equipment can supplement the drugs on line, has stronger controllability, and is beneficial for use in subsequent building construction.