1021results about How to "Energy saving and environmental protection" patented technology

The invention discloses a solar energy storage, ventilation and heating system, which comprises a heat storage wall composed of a heat-insulation layer, a heat storage layer and an aluminum plate painted with black paint, a heat storage ventilation channel or a combination thereof, which are sequentially arranged on the outer side of the external wall of a building; a transparent cover plate arranged on the outer side of the heat storage wall or the heat storage ventilation channel; an air sandwich between the transparent cover plate and the heat storage wall; and an upper vent and a lower vent having valves and arranged on the transparent cover plate and the heat storage wall. The solar energy storage, ventilation and heating system can achieve intermittent ventilation and heating without consuming non-renewable energy by using the special heat absorption and release functions of a phase-change heat storage material and by controlling the valves of the vents. The system has the advantages of energy conservation, environmental protection, simple control and handsome structure, and can be widely used for common residential buildings and public buildings.

The invention discloses a dynamic performance testing system, which is used for testing dynamic performance of an anchor rod or an anchor cable and comprises a main unit and a testing control device. The main unit comprises a vertical framework, a clamping device, a hammer dropping device, a lifting device and a protection device, wherein the clamping device is arranged on the top of the vertical framework and used for clamping the top end of a sample perpendicularly, the bottom end of the sample is provided with a tray, the hammer dropping device is used for dropping a hammer from a set height of the vertical framework to impact the tray, the lifting device is used for lifting the hammer dropping device at the bottom of the vertical framework to a set height, the protection device is used for physical protection and isolation so as to reduce personal harms and noise. The testing control device is used for controlling parameter selection, lifting and dropping of hammer dropping of the hammer dropping device, analyzes real-time impact data sensed by a force sensor of the tray when the hammer drops perpendicularly from the force sensor and outputs testing results. The dynamic performance testing system has advantages of universality and accurate and reliable testing results.

The invention discloses thermal insulation mortar which comprises the following components in percentage by weight: 20 to 60 percent of caustic calcined magnesia, 1 to 25 percent of fly ash, 5 to 35 percent of thickening time control agent, 0 to 40 percent of enhanced thickener, 1 to 20 percent of kieselguhr, 5 to 35 percent of expanded aggregate, 0 to 5 percent of polystyrene foam particles, 0 to 0.2 percent of polypropylene fiber, 0.5 to 8 percent of water-resisting admixture, and 0 to 2 percent of water reducing agent. The thermal insulation mortar has the characteristics of capability of coagulating and hardening quickly and having strong binding capacity with base materials, good volume stability, capability of producing volume micro-expansion in the process of coagulating and hardening, no crack, no splitting, strong water resistance, ageing resistance, long service life, light weight, and good heat preservation and heat insulation performance, wherein the coefficient of thermal conductivity is 0.05 to 0.30 W / m.k. The thermal insulation mortar has the advantages of no toxicity, odourlessness, zero radioactivity, no harm to human bodies, no pollution to environments, energy conservation, environmental friendliness and low production cost.

The invention relates to a method for preparing solventless unsaturated polyester-imide wire coating enamel. The method comprises preparation of unsaturated polyester-imide and processing of paint mixing, wherein the unsaturated polyester-imide is prepared by the following steps: first step, adding polylol, dibasic acid or estolide into a reaction kettle according to a mol ratio of 1.05-1.5:1; stirring and heating the mixture to a temperature of between 160 and 170 DEG C; preserving the heat for 0.5 to 2 hours; and slowly heating the mixture to a temperature of between 200 and 205 DEG C until the acid value is no less than 50 mg KOH / g; and second step, cooling the mixture to a temperature of between 110 and 120 DEG C, adding trimellitic anhydride and diamine with the mol ratio of 2:1, and preserving the heat at a temperature of between 130 and 150 DEG C until the material is transparent; and after 1 hour of heat preservation, slowly heating the material to a temperature of between 200 and 205 DEG C until the acid value is no less than 30 mg KOG / g. Machine winding dipped by the solventless resin has the advantages of small volatilization loss, high filling rate, few times of paint dipping, short baking time, strong binding power, excellent performance of electrical appliance, environmental pollution reduction, and the like.

The invention discloses a preparation method of high dispersed white carbon black. According to a new method and technology, a synthesis reaction of liquid soluble glass and concentrated sulfuric acid is carried out in two steps by first preparing fine seeds, and then carrying out a synthesis reaction, wherein the synthesis reaction is a precipitation reaction carried out under effects of an organic surfactant SDS and a composite silane coupling agent. The high dispersed precipitated white carbon black specially used in high-performance tyres is obtained through particle surface cladding, modification treatment, press filtration, washing, pulping and pressure drying. The method improves a traditional white carbon black production technology of a precipitation method by optimizing technological parameters and using an optimized auxiliary agent to meet a requirement of enhanced product dispersiveness; besides the method overcomes defects of an ordinary precipitation method, such as crude particles, wide distribution, strong hydrophilism and weak mixing dispersion. A prepared product has characteristics of fine primary particles, low surface hydroxyl content, increased lipophilicity,high bonding force with rubber high molecules and high wettability, and is an ideal reinforcing filling material specially used in high-performance tyres.

The invention discloses an antistatic coating for ultraviolet curing and a preparation method of the coating. According to the coating, poly3,4-ethylenedioxy thiophene is taken as a conductive component, waterborne polyurethane acrylic ester is taken as a matrix resin, waterborne polyurethane is taken as an auxiliary functional resin, and additives such as a monomer, a photoinitiator, a leveling agent, a substrate moistening agent and a defoaming agent are added, thus preparing the antistatic coating which is excellent in property. The surface resistivity of the coating formed on a PET (Polyethylene Terephthalate) film is 10<5>-10<8>omega / sq. The coating is free of harmful components such as methylbenzene or xylene, is low in volatile organic solvent content, environment-friendly and high in curing speed and has the characteristics of high efficiency, energy conservation and the like. After being cured, the coating has good adhesion property and long-lasting antistatic effect. Therefore, the coating has good popularization prospect.

The invention discloses a processing system and a carbonization pile-forming method used for ground stabilization. The processing system comprises a stirring device, a curing agent supply device, a foam supply device and a curing accelerating device. The foundation is reinforced by using the system, a light roasting activity magnesia powder or a mixture of the light roasting activity magnesia powder and quicklime powder is used as a curing agent, and carbon dioxide foams are generated by one of or a mixture of anion surface activity foaming agent, a protide foaming agent or a compound foaming agent according to different half-life period characteristics of the foaming agents; a sealing film and a movable sealing cover are used as temporary shields used for accelerating the formation of a curing soil layer, and a covering film with high compactness is provided for the carbonization of a lower pile body. The energy-saving and environment-friendly new curing agent is adopted, the gas leakage of carbon dioxide and the using amount of ventilating guide pipes in the construction are reduced simultaneously, and the processing system and the carbonization pile-forming method have the advantages of energy conservation, emission reduction, sustainable development and efficient construction in the raw material production and construction processes.

The invention discloses a solar-aided, air-source, trans-critical CO2 heat pump integrated air-conditioning system, belonging to the field of solar energy utilization and air conditioning technique, comprising CO2 heat pump (refrigerating) system, solar heat collecting system, indoor heat exchange system and outdoor heat exchange system, interconnected through three-way and four-way valves according system operation path. And for different weather conditions in the four seasons, it can adopt the five operating modes of heating, refrigeration, hot water, heating + hot water, and refrigeration + hot water, implementing hot water, cold and heat supply; besides, by adopting CO2 as heat pump (refrigeration) working medium, it has advantages of high efficiency, saving energy and environmental protection, compactness, and low operation cost.

The invention relates to a cement-based composite material product and a preparation method thereof. A white or colored cement-based composite material plate with the super-high strength is characterized by being compounded by white cement, slag powder, medium sand, fine powder, active gap filler, mixed fiber, water-reducing agent, pigment and water, wherein the plate comprises the white cement, the slag powder, the medium sand, the fine powder and the active gap filler in parts by mass: 847-1016 parts of the white cement, 203-254 parts of the slag powder, 914-931 parts of the medium sand, 203-254 parts of the fine powder and 203-254 parts of the active gap filler; the adding amount of the mixed fiber is 1.5-2.5 percent of the total mass of the white cement, the slag powder, the medium sand, the fine powder and the active gap filler; the adding amount of the water-reducing agent is 0-2.0 percent of the total mass of the white cement, the slag powder and the active gap filler; the adding amount of the pigment is 0-5.0 percent of the total mass of the white cement, the slag powder and the active gap filler; and the mass ratio of the water to the white cement, the slag powder and the active gap filler is in a range of 0.16-0.18. The white or colored cement-based composite material plate with the super-high strength, provided by the invention, has the advantages of better mechanical property and decorative property, and long decorative effects.

The invention discloses a piezoelectric ceramic with low sintering temperature and high piezoelectric property and preparation technology thereof. The piezoelectric ceramic comprises main ingredients and auxiliary ingredients. The chemical formula of the main ingredients is as below, wherein Me is any one or two of Ba, Ca and Sr, and the auxiliary ingredients are SiO2, H3BO3 or the mixture of the two ingredients, and Sb2O5 or Sb2O3, Bi2O3 or Bi2O5, Li2CO3 or Na2CO3 or the mixture of the two ingredients, and CuO. The preparation technology comprises mixing, ball milling, stoving, presintering, ball milling, pelleting, forming, dumping, sintering, silver brushing, silver sintering and polarizing. The piezoelectric ceramic provided by the invention has the advantages of energy saving, environmental protection, low cost, high property and the like, has wide application prospect and is especially suitable for piezoelectric ceramic loudspeakers and piezoelectric buzz films with large power.

The invention discloses a non-contact solar cell panel cleaning device, and relates to solar cell panel cleaning devices. The non-contact solar cell panel cleaning device comprises a movable device (1) and a cleaning device (2) arranged on the movable device (1). The cleaning device (2) comprises a supporting mechanism (3) and a cleaning mechanism (4) connected with the supporting mechanism (3). The cleaning mechanism (4) comprises a plurality of spray pipe supports (5) arranged at intervals and a fixing mechanism (6) which connects the spray pipe supports (5) into a whole, high pressure spray pipes (14) are arranged on the spray pipe supports (5), cleaning agents used for cleaning a solar cell panel (7) are contained in the high pressure spray pipes (14), spray holes (15) which are formed at intervals are formed in each high pressure spray pipe (14), each spray hole (15) is connected with a spray nozzle (16), and the cleaning agents are sprayed onto the solar cell panel (7) through the spray nozzles (16). When the solar cell panel is cleaned through the non-contact solar cell panel cleaning device, the cleaning mechanism does not need to make contact with the solar cell panel, and therefore the solar cell panel can be effectively protected.

The invention belongs to the technical field of wireless power transmission, and particularly relates to a magnetic coupling dual-mode wireless power transmission device and a control method thereof. By the magnetic coupling dual-mode wireless power transmission device, wireless power transmission efficiency can be improved, and power loss is small. The magnetic coupling dual-mode wireless power transmission device comprises a transmitting end and a receiving end and is structurally characterized in that the transmitting end comprises a primary induction coil, a primary resonance coil, a primary resonance capacitor, a primary switch, a high-frequency inversion circuit, an IGBT driving circuit, a switch power source, an external power source interface, a transmitting end control unit, a primary induction coil voltage sampling module, an ADC conversion circuit A and a Wi-Fi module A, and a power input port of a switch power source is connected with the external power source interface while a power output port of the same is connected with a power input port of the high-frequency inversion circuit.

The invention discloses an LED bulb, which has good light transmitting performance and has the same light emitting mode, volume and shape as common incandescent light bulbs. The LED bulb comprises a bulb holder (1), a driving circuit component (2), a light source support (3), an LED light source (4) and a bulb case (5), wherein the light source support (3) comprises a pedestal (31) and a polyhedron (32) and is made of metal; the internal axial center of the pedestal (31) is provided with a wire hole (33); the polyhedron (32) is positioned on the top of the pedestal (31); the lower part of the pedestal (31) and the inner wall of the bulb holder (1) are contacted tightly for heat conduction; the LED light source (4) comprises heat dissipating baseplates (40) and LED chips (41) positioned on the heat dissipating baseplates (40); the heat dissipating baseplates (40) are directly fixed on each surface of the polyhedron (32) in the circumferential direction, and the LED chips (41) give out light in all directions by taking surfaces of the polyhedron (32) in the circumferential direction as the reference surfaces; and the driving circuit component (2) is electrically connected with the bulb holder (1) and the LED light source (4) through leads.

The invention discloses an industrial waste residue soil stabilizer. The industrial waste residue soil stabilizer is prepared from 5-50% of raw material steel slag powder, 20-40% of slag powder, 5-30%of fly ash, 8-25% of waste gypsum, 0-17% of coal gangue and 10-30% of carbide slag through the following method: firstly, raw materials including fly ash, coal gangue powder, waste gypsum, steel slagpowder and slag powder are sequentially added into a coulter type stirrer and are uniformly mixed at a high speed of 1500-2000 r / min for 20-30 min, finally, the carbide slag is added, stirring continues to be conducted for 10-20 min, and an obtained curing agent finished product is bagged, sealed and stored. The industrial waste residue soil stabilizer prepared by the invention can replace cementand lime to be applied to roadbed improvement and treatment, has the outstanding advantages of no calcination, energy conservation, environmental protection and the like, has obvious price advantagecompared with cement and lime, plays a positive role in promoting the resource utilization of industrial wastes such as fly ash, carbide slag, steel slag and the like, and has wide and far-reaching significance.

The invention relates to a composite contactor which belongs to the field of electric switches, in particular to a contactor suitable for powering on and off a power capacitor. In the invention, an input power supply is subjected to current limit by a capacitor voltage drop circuit and rectification by a rectifying circuit and used for supplying power to a control coil of the contactor; the capacitor voltage drop circuit is connected with a starting electronic switch in parallel, the control end of the starting electronic switch is connected to a control circuit, and the control circuit is connected with a working power supply; a voltage zero passage detection circuit and a controllable silicon circuit are connected to two ends of a mechanical contact of the contactor in parallel; and the output end of the voltage zero passage detection circuit and one on control end of the controllable silicon circuit are connected to the control circuit, while the other on control end of the controllable silicon circuit is connected to a contact bridge of the contactor. The control coil of the composite contactor adopts a capacitor voltage drop direct current working manner, and the controllable silicon circuit adopts a design with multiple control ends, so that the composite contactor has the advantages of environmental protection, energy saving, strong anti-jamming, power on work, power on with voltage zero passage, power off with current zero passage, short controllable silicon on time, high reliability and long operation service life.

The invention relates to the technical field of advertisement display boards, in particular to outdoor energy-saving advertising equipment. The equipment comprises an advertising board, a sweeping device, a mounting base, a dust sensor and a controller; the mounting base is of a box structure and comprises an upper box body and a lower box body, a partition plate is arranged between the upper box body and the lower box body, the advertising board is arranged on the mounting base, a rainwater collecting box, a solar electromagnetic board and a wind-driven generator are arranged on the top of the advertising board, the power output ends of the solar electromagnetic board and the wind-driven generator are connected with a storage battery which is arranged inside the upper box body and supplies electricity for the whole equipment, a drain hole is formed in the bottom of the rainwater collecting box, a water diversion pipe is connected to the drain hole, the lower end of the water diversion pipe penetrates through the partition plate and leads to the lower box body, a water level sensor is arranged inside the lower box body, and a valve is arranged on the water diversion pipe. By means of the outdoor energy-saving advertising equipment, the problem that due to the fact that nobody cleans a traditional advertising board for a long time, the advertisement display effect is affected can be solved, and the function of automatically cleaning the advertising board is achieved.

The invention discloses a self-heat-insulation light weight wallboard containing hollow ceramsites and a preparation method thereof, and belongs to the technical field of building materials. The self-heat-insulation light weight wallboard comprises the following components by mass: 20-60 parts of a cementitious material, 5-30 parts of a lightweight aggregate, 0.05-0.5 part of a composite early strength agent, 2-8 parts of a foaming agent, 0.02-0.14 part of a foam stabilizing agent, 0.1-0.8 part of a catalyst, 0.05-0.6 part of a binder, 0.05-0.6 part of straw fiber and 15-30 parts of water. The preparation method is as follows: putting the cementitious materials, the straw fiber and the binder together, then mixing, then orderly adding the water, the foaming agent, the stabilizer and the catalyst, stirring to obtain a slurry mixture, adding hollow ceramsites, obturator perlite and expanded vermiculite in saturated surface-dry condition, stirring, then using an injection pump to inject into a wallboard forming machine for molding, and 3-5 hours after the concrete is solidified and hardened, demoulding to obtain the self-heat-insulation light weight wallboard containing the hollow ceramsites. The self-heat-insulation light weight wallboard containing the hollow ceramsites has energy saving, environmentally-friendly, fire insulating, sound-insulation, high-strength, lightweight, waterproof, thermal-insulation, corrosion-resistant, durable and other characteristics.

The invention discloses a microbial flocculant as well as a preparation method and application thereof. The preparation method comprises the following steps: inoculating flocculant-producing bacteria in a coarse fiber raw material to prepare a fermentation substrate with water content of 50-80 percent and pH (potential of Hydrogen) of 2-7; performing aerobic fermentation and anaerobic fermentation in sequence to obtain a fermentation product; leaching the fermentation product by using alkali liquor; filtering and drying leaching liquor to prepare the microbial flocculant. The fiber raw material is biologically converted by using the specific flocculant-producing bacteria, and meanwhile, a large amount of metabolites are produced during growth of the flocculant-producing bacteria, so that the obtained microbial flocculant has higher flocculation performance; the microbial flocculant is especially suitable for high-efficiency economic treatment on low-concentration heavy metal wastewater; the waste vegetables and crop straws are used as the raw materials which are low in cost, readily available and have wide sources, so that the recycling of the large amount of waste straws is realized; no wastewater is produced during production of the microbial flocculant, energy conservation and environmental friendliness are realized, the production process is simple, and the operation is convenient.

The invention discloses a plant cultivation method which includes the step: cultivating tissue culture seedlings acquired by tissue culture in an energy-saving greenhouse or energy-saving planting greenhouse. A tissue culture process includes the steps: collection of explants; cleaning; disinfection; inoculation of the explants; subculture; rooting culture; transplant. The energy-saving greenhouse or energy-saving planting greenhouse comprises a solar power system, a spray irrigation system and a lighting system. According to the method, horticultural facilities applied in plant cultivation process are uniformly improved and comprise the solar power system, the lighting system, the spray irrigation system, a cleaning and disinfection device, a culture medium filling device and the like, wherein the cleaning and disinfection device and the culture medium filling device are used for the tissue culture process, the whole plant cultivation process is more complete by the aid of a series of improvements and combinations, working efficiency is improved, and each improvement is quite important.

The invention relates to a semi-flexible anti-rut pavement material which comprises the following components in percentage by weight: 65-88% of big-void cement-base mixture and 12-35% of flexible grouting material. The big-void cement-base mixture comprises 1 part of cement, 4-6 parts of coarse aggregate, 0.4-1.0 part of fine aggregate, 0.1-0.3 part of water and 0-0.006 part of water reducing agent. The flexible grouting material comprises 1 part of cement, 0.65-1 part of modified emulsified asphalt, 0.1-0.35 part of water-based epoxy resin emulsion, 0-0.03 part of ground tire, 0.0025-0.007 part of water reducing agent, 0.05-0.2 part of expanding agent and 0.05-0.15 part of water. The semi-flexible anti-rut pavement material has the characteristics of high rut resistance, favorable flexibility and toughness, no seam, fewer cracks, low carbon, environmental protection and the like, can be constructed at room temperature, and is suitable for road rut treatment.

The invention discloses a method for producing a resin emulsion used for water-based metallic paint and a produced resin emulsion thereof. The resin emulsion is prepared by the following raw materials by weight: 0-260 parts of styrene, 40-310 parts of methyl methacrylate, 3.0-5.0 parts of acrylamide, 16.5-23.5 parts of acrylic acid, 182-202 parts of butyl acrylate, 18-38 parts of functional unsaturated monomers, 1.1-2.1 parts of an emulsifier, 5.4-7.4 parts of a phosphorus and double bond-containing polymerizable surfactant, 8-12 parts of organosilicon monomers, and 45-55 parts of a Zn<2+> solution with a mass concentration of 12-16%. The method of the invention employs a core-shell emulsion polymerization technology to make the emulsion has an overall high vitrification temperature and alow film-forming temperature. By adopting a phosphorus and double bond-containing polymerizable surfactant, the water proofness and corrosion resistance of the emulsion are enhanced. By using a dual normal-temperature self-crosslinking technology, a compact netted polymer structure can be formed, so that the emulsion can has good adhesive force, hear resistance, wear resistance, as well as the advantages of energy saving, environmental protection, nontoxicity and harmlessness.

The invention discloses a pavement structure based on the water sand backfilling technology and a construction method thereof. The thickness of the pavement structure is 50cm. The pavement is divided into a surface layer, a base layer and a cushion layer from top to bottom, wherein the thickness of the surface layer is in a range of 8cm to 10cm, the thickness of the base layer is in a range of 18cm to 22cm, and the thicknesses of the cushion layer are in a range of 18cm to 22cm. the cushion layer is arranged between a soil layer and the base layer, and backfilling sand is arranged under the cushion layer. The process is simple and practical, and bearing capacity strength and stability of backfilling soil are guaranteed to be in accordance with engineering safety requirements.

The invention provides a method for processing a lathe spindle, belonging to the field of mechanical technology. By means of the method, the problems of serious waste of materials and cumbersome processing in a conventional processing method of the spindle are solved. The method for processing the lathe spindle comprises the following steps of: A, material selecting; B, end heating; C, end hammering; D, machining; and E, surface treatment. The method for processing the lathe spindle has the advantages of material saving, strong stability in flange forming and high processing efficiency.

The invention discloses a multifunctional composite material and an application thereof. The multifunctional composite material is in a layer-like structure formed by using a binding agent to carry out hot-press compositing, and comprises an upper outer surface layer, a lower outer surface layer and a middle layer. The multifunctional composite material is characterized in that the upper outer surface layer and the lower outer surface layer are formed by transparent polymers; the middle layer contains at least one layer of textile fabric; art patterns are arranged on at least one surface of the textile fabric; and the binding agent for hot pressing is a non-light-tight polymer. The composite material disclosed by the invention has various functions of high light transmission, art decoration, light weight and convenience, high strength, strong anti-impact capability, screening of electromagnetic radiation, high toughness, isolation of ultraviolet rays and infrared rays and the like, and can be applied to various industries, such as industries of manufacturing a sun-shading and lighting product, a panel for a household appliance, an indoor decorative material, a sports protection product, a safe protection product, a partition wall, abruption, a luggage and the like. The multifunctional composite material is widely applied, can meet various functional requirements on the material in the current society, and has the advantages of practical values, energy conversation and environmental friendliness.

The invention discloses a process for manufacturing a high-strength aluminum alloy plate, which comprises eleven steps of batching, smelting, checking, standing, casting, sawing and face milling, heat treatment, hot rolling, quenching, ageing and finished product shearing in turn. The manufacturing process radically changes the common phenomena of high energy consumption and high pollution in the conventional smelting furnace, meets the requirements of energy conservation and environmental protection, and the cast aluminum alloy plate has high mechanical property and good machining quality, and meanwhile the finished product rate and the production efficiency are effectively improved.

The invention discloses a catalyst for efficiently removing formaldehyde in air or waste water at room temperature as well as a preparation method thereof. In the catalyst, a trace amount of noble metal serves as an active component and manganese-based composite oxide serves as a carrier; the general formula can be expressed as M / M1Ox-MnO2; in the formula, M represents one of Ru, Rh, Pt or Pd, M1is one of Fe, Co, Ni, Cu or Ce and x is less than or equal to 2; the catalyst comprises 0.01 to 1 percent (preferably 0.05 to 0.8 percent) by weight of noble metal M and the balance of composite oxidecarrier, and the molar ratio of M1 to Mn is 0:1 to 1:1; and the catalyst can be prepared by a redox-hydrothermal one-step method. The prepared catalyst can effectively transform formaldehyde into carbon dioxide and water at room temperature, has high selectivity and has the advantages of energy saving and environmental friendliness. The preparation method of the catalyst has the advantages of lowcost, simplicity, practicability, mild condition, easiness in control, suitability for industrialized production and the like.

The invention relates to an LED work lamp for engineering trucks, which comprises a lamp holder (1). A radiator (1.1) is disposed at the back of the lamp holder (1), the front lateral wall of the lamp holder (1) is provided with a step face (1.2), an aluminum substrate (2) is fastened to the front of the lamp holder (1), thermally conductive adhesive is adhered between the aluminum substrate (2) and the lamp holder (1), LEDs (2) are disposed on the aluminum substrate (2), a reflecting plate (4) further covers the aluminum substrate (2) and is provided with through holes (4.1) corresponding to the LEDs (3), the reflecting plate (4) is provided with round conical reflecting cavities (4.2) at the through holes (4.1), a lens (5) is disposed in each reflecting cavity (4.2), and a lamp shade (6) covers the aluminum substrate (2). The LED work lamp for engineering trucks is long in service life, maintenance-free, energy-saving and environment-friendly.

The invention discloses a full-hydraulic crawler-type self-propelled trestle and a construction method thereof. The trestle comprises a main bridge, a front approach bridge and a rear approach bridge,and further comprises two short-side walls symmetrically arranged at the left and right and an inverted arch backfill construction template, wherein the main bridge comprises two main beams symmetrically arranged at the left and right, a plurality of distributive girders and a bridge floor structure, and the short-side walls and the inverted arch backfill construction template comprise forming templates and template supporting frames; when a tunnel is constructed, the full-hydraulic crawler-type self-propelled trestle is used for constructing the tunnel bottom lining and inverted arch backfill layer of the constructed tunnel from back to front separately by multiple tunnel sections. The full-hydraulic crawler-type self-propelled trestle and the construction method thereof have the advantages that the design is reasonable, the construction is simple and convenient, the use effect is good, self-propelled stable walking can be performed in the tunnel by adopting a crawler-type walking mechanism, the synchronous construction of the tunnel inverted arch, short-side walls and inverted arch backfill can be achieved, tunnel digging and deslagging construction can be simultaneously performed, the tunnel construction efficiency can be greatly improved, the construction quality of the tunnel inverted arch, short-side walls and inverted arch backfill can be ensured, and the construction process is safe and reliable.

The invention discloses a no-coating weather-proof round steel production method. A heating process is characterized in that a heat storage heating furnace is used for heating; a rolling process is characterized in that a low-temperature rolling process is adopted; and a cooling process is characterized in that a wind sheltering stack cooling mode is adopted for cooling. Weather-proof round steel produced through the method can be used for producing 10.9-grade high-strength no-coating weather-proof bolts, can be widely applied to no-coating weather-proof steel bridges, and has the effects of energy conservation, environmental protection and beauty.

The invention relates to the field of stereo garage devices, in particular to a cylinder-type stereo garage. The cylinder-type stereo garage comprises a cylindrical garage shaft, an entrance gate house system arranged on a shaft mouth of the top of the garage shaft, more than two layers of annular parking layers vertically distributed along the garage shaft, a lifting rotation platform arranged at the center of the garage shaft and used for fetching vehicles and a traction mechanism for driving the lifting rotation platform to vertically lift. The cylinder-type stereo garage is reasonable in structure, stable to operate, efficient and stable and is suitable for fetching vehicles.