99results about How to "Reduce rust rate" patented technology

The invention relates to a wire rope lubricating grease composition having dual effects of lubrication and anti-corrosion. The composition comprises the following components: 51.0 % to 72.5 % of No. 2 composite calcium sulfonate grease, 25.0 to 38.0 % of low-freezing-point base oil, 0.2 to 1.0 % of diphenylamine, 1.3 to 5.5 % of colloidal graphite and 1.0 to 4.5 % of ozocerite. According to the invention, the composite uses the specific composite calcium sulfonate grease as a base oil, and is added with the low-freezing-point base oil and various additives to further improve performance such as low-temperature resistance, anti-oxidation, wear resistance, and water resistance of the product, so that the wire rope lubricating grease having dual effects of lubrication and anti-corrosion can be obtained. The lubricating grease has dual effects of lubrication and anti-corrosion, and can delay corrosion and wearing speed of the wire rope. The product is suitable for lubrication and protection of various wire ropes under ocean climate conditions such as seaport, marine ship, offshore drilling platforms, etc.

The invention relates to an environment-friendly steel protecting and repairing coating for concrete structures and a method for preparing the coating. The coating is compounded by components including, by mass, from 0.5 to 10% of organic corrosion inhibitor, from 5 to 35% of thermoplastic or thermosetting resin for realizing toughness and a waterproof sealing performance for a cement base material, from 15 to 50% of cement, from 0 to 4% of surfactant, from 0 to 5% of superfine fibers and the balance water component. The environment-friendly steel protecting and repairing coating in the technical scheme is particularly suitable for protecting the surface of steel exposed outside for a long time and coating to protect the surface of reinforcing steel for a high-durability concrete structure in a harsh environment, can permeate into a concrete base with extremely fine capillary channels and a complicated geometric structure, and accordingly is also applicable to durability repair for damaged concrete structures.

The invention discloses a device for repairing a concrete structure damaged by salt through two-step process, including a steel bar that acts as a cathode and is disposed in concrete, an electrolytic tank whose mouth is in seal seal fit with a surface of the concrete, electrolyte disposed in the electrolytic groove, an anode immersed in the electrolyte and a direct current power supply for providing power to the cathode and the anode, wherein the electrolytic groove is provided with an electrolyte inlet, an electrolyte outlet and a pH indicator, a probe of the pH indicator penetrating througha wall of the electrolytic groove and contacting with the electrolyte. The device provided in the invention is capable of timely replacement of electrolyte which is conducive to full discharge of chloride ions, and is capable of real-time monitoring of the ph value of the electrolyte, being applicable to concrete structures of various kinds of shapes; in addition, the device has the advantages ofsimple structure, convenient operation and effective removal of the chloride ions in a concrete protective layer with the removal efficiency achieving about 60%; further, the device can raise the corrosion potential of a corroded steel bar, decrease corrosion rate, realize the repassivation and maximumly repair a concrete structure damaged by salt.

The invention discloses a novel flexible coast protection structure and a construction method of the novel flexible coast protection structure. The structure comprises a mattress tying beam and a wave dissipating platform, wherein the mattress tying beam and the wave dissipating platform are close to the designed water level; the wave dissipating platform is connected with the bottom and the top of a bank slope through a slope and a wave wall respectively; a pebble cushion layer and composite geotextiles are sequentially laid on the lower surface of the slope and the lower surface of the wave dissipating platform. Composite geotextiles and a gravel cushion layer are sequentially laid on the upper surface of the slope and the upper surface of the bottom of the bank slope. A concrete hinged mattress is laid on the gravel cushion layer. The top end of the hinged mattress is connected to the mattress tying beam. The method comprises the steps of prefabrication of concrete ballast block bodies, construction of the mattress tying beam and a bank protection structure above the mattress tying beam, splicing of the concrete hinged mattress, mattress sinking construction and the like. Compared with the existing coast protection technology, the novel flexible coast protection structure has the advantages that the integrity is good, the anti-erosion capability and the coastal erosion deformation adaptability are high, materials are easy to obtain, construction is easy, and maintenance management is convenient; the problem that a traditional rigid seawall bank protector is prone to collapse and damage on the condition of coastal washout deformation can be effectively solved, and a new approach is provided for coast protection.

The invention discloses a bidirectional electroosmosis repairing method of a corrosive concrete structure. The method comprises the following steps of: injecting a corrosion inhibitor into electrolyte; with the steel bar in the concrete as a cathode, paving a stainless steel net on the concrete surface as an anode; immersing the anode into the electrolyte containing the corrosion inhibitor; applying DC (direct current) power between the anode and cathode, and controlling the applied current density to be 1-5A / m<2> based on the total surface area of the steel bar; and cutting off the power 10-20 days later. The method disclosed by the invention is convenient to operate, improves the moving ability of the cationic corrosion inhibitor, and can enable the corrosion inhibitor to enter the steel bar surface through electroosmosis in relatively short time; through the invention, the chloride ions in a concrete protection layer can be effectively removed, and the precipitation rate of chloride ions is high; and moreover, the corrosion potential of the corroded steel bar is increased, the corrosion rate is reduced, re-passivation is realized, the salt-damaged concrete structure is repaired to the greatest degree, and the service life of the structure is prolonged according to the expected requirements.

The invention relates to the technical field of data transmission equipment, in particular to an outdoor data transmission box based on blockchain technology. The transmission box comprises an equipment main body, heat dissipation holes are formed in the left side surface and the right side surface of the equipment main body; a shielding plate is fixedly connected to the upper surface of the equipment main body; a transmission shaft is inserted into the upper surface of the equipment main body; fan blades sleeve the outer part of the upper end of the transmission shaft; the lower end of the inner wall of the equipment main body is fixedly connected with a positioning plate; the heat dissipation holes are shielded through the flashing board; therefore, external rainwater is prevented from rebounding through the ground or being blown into the equipment main body by wind; internal parts are protected, therefore, normal operation of equipment is ensured, and influence on data transmissionis avoided at same time; the air bag on the right side is extruded through an extrusion plate, a drying agent in the air bag is blown out through a discharging opening, moisture in the equipment mainbody is reduced, the rusting speed of parts in the equipment main body can be well reduced, and therefore the service life of the equipment is prolonged.

The invention relates to a bolt net coal road spraying material which is added with polyacrylate emulsion and modified on the basis of components such as cement, water reducing agent and accelerating agent. The spraying material can be separately added with 801 adherent and fly ash, silica powder and fly ash, and silica powder and sand for three different injection conditions, namely the normal enclosed environment, small water pouring environment and complicated geological structure environment of the coal road to increase the mechanical properties and using effects. The spraying material has high adhesive strength to the coal wall and the bolt net, high elongation ultimate, high tensile strength, low tensile elastic modulus, small shrinkage, much higher crack resistance, high permeability resistance and much higher compactibility, the spraying material can protect the internal bolt net from erosion and obviously slower the corrosive velocity; the spraying material has good ageing resistance and can reach the aim of delaying the corrosion of the bolt net and the coal wall. In addition, the spray layer is thin and uniform, the construction speed is quick, and the resilience rate, the dust concentration and the cost are low.

The invention discloses a concrete crack repair material and a preparation method thereof, wherein the concrete crack repair material is prepared from the following raw materials by weight: 30-50 parts of modified cement mortar, 4-6 parts of a filler, 5-10 parts of an epoxy resin, 8-12 parts of a diluent, 5-10 parts of a plasticizer, 5-10 parts of a curing agent, 1-2 parts of an expansion agent, and 1-2 parts of a water reducing agent. Compared with the concrete crack repair material in the prior art, the concrete crack repair material of the present invention has the following characteristicsthat the modified cement mortar uses acrylate emulsion mortar, the acrylate emulsion mortar is a novel concrete building repair material, and has excellent performances of improved limit elongation,improved tensile strength, reduced tensile modulus, low shrinkage, significantly improved crack resistance, improved impermeability, improved chlorine ion impermeability and the like compared with ordinary mortar, such that the concrete crack repair material of the technical scheme of the present invention is suitable for the anti-seepage, anti-corrosion protection surface and repair engineering of water conservancy, highways, industrial and civil building, and other reinforced concrete structures.

The present invention relates to a transformer with good heat-dissipation performance. The transformer comprises a main body, an oil conservator, a heat-dissipation mechanism and a rust-removing mechanism. The rust-removing mechanism comprises a moving plate, a motor, a transmission component, a lifting sleeve tube, a first spraying nozzle, a moving frame, a guiding rod, two driving wheels and twoguiding rails. The transmission component comprises an annular gear, a bevel gear, a first transmission shaft, a second transmission shaft, a first driving wheel, a second driving wheel, a first driven wheel, a second driven wheel, a first transmission belt, a second transmission belt and a driving block. The heat-dissipation mechanism comprises a water tank, a shell, a first water pipe, a secondwater pipe, a water pump and at least two second spraying nozzles. According to the transformer with the good heat-dissipation performance, by providing the rust-removing mechanism, the first spraying nozzle can be driven to move around the main body, and then the first spraying nozzle sprays a rust remover on the transformer, so that the rusting rate of the transformer is slowed down; and by providing the heat-dissipation mechanism, the heat dissipation rate of the oil conservator is improved, and thus the heat-dissipation performance of the transformer is improved.

The invention relates to the technical field of paint preparation, in particular to waterborne paint for car chassis protection and a preparation method thereof. The waterborne paint comprises water-soluble epoxy acrylic resin, polyacrylate emulsion, zinc isoocatanoate, sodium alginate, hexamethylene diisocyanate, nano silicon carbide, talcum powder, hydroxyethyl methacrylate phosphate, tourmalinepowder, anion powder, antirust pigment, a dispersing agent, a film forming agent, a levelling agent, a defoaming agent and deionized water. The waterborne paint and the preparation method thereof have the advantages that the prepared paint is good in corrosion resistance; the hydroxyethyl methacrylate phosphate, the epoxy acrylic resin and the hexamethylene diisocyanate are allowed to have crosslinking reaction under the effect of potassium persulfate to generate a stable three-dimensional network structure, the hydroxyethyl methacrylate phosphate, the epoxy acrylic resin and the hexamethylene diisocyanate are connected through covalent bonds, the adhesive force of the paint to metal is evidently enhanced by grafting the hydroxyethyl methacrylate phosphate, and paint film falling off canbe reduced.

The invention provides an additive for improving carbonization resistance of concrete as well as a preparation method and application of the additive, and belongs to the technical field of concrete. The additive provided by the invention is prepared from the following components in parts by mass: 8-12 parts of mineral substance fine powder, 3-5 parts of silica fume, 10-15 parts of metakaolin, 3-5 parts of methyl silicate, 2-3 parts of an expanding agent, 5-8 parts of a super plasticizer and 6-12 parts of a self-healing expanding fiber anti-crack waterproof agent. Results of the embodiment show that the additive provided by the invention can reduce the internal porosity of concrete by 50% or more, and reduce the number of capillary pores and macropores. The strength of the prepared concrete can be improved by 70% in 3 days, the strength of the prepared concrete can reach the original strength on the 28th day in 7 days, and the strength can be improved by about 20% in 28 days. Energy spectrum analysis before and after concrete carbonization shows that the carbon content of concrete is relatively low even if the concrete is carbonized, which indicates that the additive has very good carbonization resistance.

The invention relates to a rain sheltering platform suitable for an outdoor small site. A rain sheltering platform suitable for an outdoor small site comprises a base, a first supporting board, a second supporting board, a supporting rod and a water collecting top frame. The first supporting board and the second supporting board are vertically arranged on the base, and the first supporting board and the second supporting board are vertically connected; the supporting rod is arranged on the base and is a hollow cylindrical steel pipe, and a rainwater channel is formed in the middle of the supporting rod; the top of the supporting rod is sleeved with a first connecting base, the middle of the first connecting base communicates with the rainwater channel, a water collecting groove is formed in the top of the first connecting base, and the bottom end of the middle of the water collecting top frame is circumferentially connected with an outer ring of the first connecting base, the middle ofthe supporting rod is sleeved with a second connecting base, and the front side and the right side of the water collecting top frame are connected with a front side extending top frame and a right side extending top frame correspondingly; and color boards are arranged on the two extending top frames and the water collecting top frame respectively. The rain sheltering platform has the advantages of being small in occupied space, good in wind resistance, rain resistance and sunlight shielding effect and capable of discharging rainwater in time to prevent the ceiling from sinking, and the service life is prolonged.

The invention relates to an anti-rust protective coating for a steel material. The anti-rust protective coating is formed by compounding a compound rust transforming agent, thermoplastic or thermosetting resin, cement, a compound surfactant, ultrafine fibers and water, wherein according to the mass ratio, the compound rust transforming agent : thermoplastic or thermosetting resin : cement : a compound surfactant : ultrafine fibers=(0.5-15):(10-30):(20-65):(0-4):(0-5); the main ingredients of the compound rust transforming agent mainly comprise a divalent or trivalent metal oxide, a phosphate substance, an active filler and an alkali hydroxide which are compounded at the mass ratio of 2:8:8:1; the compound rust transforming agent can form a stable phosphating film and a complex precipitation film on the surface of rusted reinforcing steel bar; the surfactant is a sulfydryl-containing Gemini quaternary ammonium salt cationic surfactant and is prepared by reaction of the raw materials of sulfydryl-containing substances with a plurality of activated adsorption centers, such as mercaptoacetic acid sodium salt, 2-mercaptobenzothiazole sodium salt and alkyl dimethyl tertiary amines.

The invention relates to a bolt net coal road spraying material which is added with polyacrylate emulsion and modified on the basis of components such as cement, water reducing agent and accelerating agent. The spraying material can be separately added with 801 adherent and fly ash, silica powder and fly ash, and silica powder and sand for three different injection conditions, namely the normal enclosed environment, small water pouring environment and complicated geological structure environment of the coal road to increase the mechanical properties and using effects. The spraying material has high adhesive strength to the coal wall and the bolt net, high elongation ultimate, high tensile strength, low tensile elastic modulus, small shrinkage, much higher crack resistance, high permeability resistance and much higher compactibility, the spraying material can protect the internal bolt net from erosion and obviously slower the corrosive velocity; the spraying material has good ageing resistance and can reach the aim of delaying the corrosion of the bolt net and the coal wall. In addition, the spray layer is thin and uniform, the construction speed is quick, and the resilience rate, the dust concentration and the cost are low.

The invention relates to a grease composition for assembling standard sections of a tower crane and a preparation method of the grease composition. The grease composition comprises the following components in percentage by weight: 78.8%-94.8% of common lithium-based grease, 0.2%-0.8% of antioxidant, 0.8%-3.2% of graphite powder, 1.0%-4.5% of light calcium carbonate, 0.5%-3.0% of sorbitan monooleate, 0.4%-2.2% of phenolic resin, 2.0%-6.0% of sulfonate and 0.3%-1.5% of polyisobutene. The special grease composition for assembling the standard sections of the tower crane is obtained by adding additives such as the antioxidant, an antifriction agent, an anti-locking and anti-occluding agent, an anti-rust agent, a tackifying agent and the like into the common lithium-based grease taken as a carrier. According to the grease composition, the corrosion speed of shaft pins of the tower crane can be slowed, the shaft pins are prevented from being corroded and bonded with a shaft sleeve during building construction, and the pin shafts of the standard sections of the tower crane can be smoothly assembled and disassembled. The service cycle of the grease composition is within 1-2 years.

The invention provides a convenient-to-adjust climbing frame for the construction industry, and belongs to the technical field of construction engineering. The convenient-to-adjust climbing frame comprises vertical beams, cross beams and guide rails, and further comprises a movable pedal assembly and a falling object bearing assembly, wherein the height of a pedal is flexibly adjusted among the multiple vertical beams, and thus the mounting height of the pedal is adjusted. By arranging a bearing net plate, fallen tools can be borne, the tools are prevented from injuring operators below, and the construction safety of the climbing frame is improved; the bearing net plate is rotatably connected with a fixing shaft and is borne by a movable hook, and thus the bearing net plate can be movablyconnected with the pedal; and the movable hook is detached from a bearing-supporting shaft, the bearing net plate and the movable hook freely droop under the action of gravity, and the bearing net plate and the movable hook are both located under the pedal so that the bearing net plate can be prevented from colliding with a protruding area on a wall in the lifting process of the climbing frame, and smooth climbing of the climbing frame is guaranteed.

The invention discloses an oxidation-resistant corrosion-resistant additive for preparing protective paint for an underground metallic pipeline, and relates to the technical field of paint for pipelines. The oxidation-resistant corrosion-resistant additive is prepared from the following raw materials in parts by weight: 15 to 20 parts of polytetrafluoroethylene ultrafine powder, 5 to 10 parts of rosin modified phenolic resin, 3 to 6 parts of polyvinyl chloride paste resin, 3 to 6 parts of polyethylene glycol terephthalate, 2 to 4 parts of ethylene-vinyl acetate copolymer, 2 to 4 parts of rubber powder, 1 to 2 parts of polydimethyldiallyl ammonium chloride, 1 to 2 parts of vulcanized lard, 0.5 to 1 part of sepiolite fiber, 0.5 to 1 part of glass fiber powder, 0.3 to 0.5 part of ferrous sulfate, 0.3 to 0.5 part of nano zinc oxide, 0.1 to 0.3 part of N-methyl pyrrolidone and 0.1 to 0.3 part of 1-butyl-3-methylimidazolium dicyanamide. By using the additive provided by the invention, a coating formed by the paint can be enabled to have excellent oxidation resistance and corrosion resistance; the erosion of soil and air to a metallic pipeline is retarded; the rusting speed of the surface of the metallic pipeline is slowed down.

The invention provides a protecting device for an extra-high pressure engineering foundation bolt and relates to the technical field of foundation bolt protection. The protecting device is used for realizing the rustproof protection and external force damage protection for the foundation bolt and preventing the influence on the schedule of power construction caused by the damage to the foundation bolt. The protecting device can realize the dehumidification in a barrel through first and second drying assemblies, so as to prevent the rusting of the foundation bolt caused by the higher humidity in the barrel. A spraying assembly is used for spraying anti-rust oil on the foundation bolt, so as to further prevent the foundation bolt from being rusted. Lastly, a protecting assembly is arranged, the blasting of a balloon is performed when the barrel is damaged by an external force, so that the anti-rust oil is sprayed on the foundation bolt. When the foundation bolt is exposed, the rusting speed of the foundation bolt is reduced. The barrel has a certain protecting function to the foundation bolt and can prevent the foundation bolt from being damaged by the external force. The device can prevent the foundation bolt from being rusted, can prevent the damage caused by the external force to a certain degree, can ensure the schedule of power construction and can avoid unnecessary economic loss.

The invention discloses a metal surface galvanizing device and method. The device comprises a galvanizing pond. Vertical columns are fixedly mounted at the four ends of the top of the galvanizing pond, two supporting plates are arranged between the tops of the four vertical columns, a conveying mechanism is arranged between the two supporting plates, the conveying mechanism is composed of a drivemotor, two rotary shafts, two transmission rollers, a conveying belt, multiple hanging rings and multiple fixing assemblies, square holes are formed in the right sides of the two supporting plates, the two ends of one rotary shaft are connected with the two supporting plates through bearings separately, the drive motor is fixedly mounted on one side of one supporting plate, and output shafts of the supporting plates are connected with one rotary shaft. The surface of a metal pipe is galvanized through galvanizing liquid in the galvanizing pond, the metal pipe can be isolated from external air,thus, the corrosion speed of the metal pipe is reduced, and then the service life of the metal pipe is prolonged.

The invention discloses an aluminum dust cover for an automobile hub and a machining method of the aluminum dust cover. The aluminum dust cover comprises a dust cover main body. A circular groove is dug in the top end of the dust cover main body. A sliding plate is connected into the circular groove in a sliding manner. A rebound plate is fixedly connected to one side of the top end of the slidingplate. A storage groove is dug in the sliding plate. Oil storage cotton is embedded in the storage groove. An installing plate is arranged on the top of the dust cover main body. A drive motor is fixedly arranged at the top end of the installing plate. According to the aluminum dust cover for the automobile hub and the machining method of the aluminum dust cover, the sliding plate is arranged tobe matched with the circular groove, and when the dust cover main body rapidly rotates, heat is generated through the rotation of the sliding plate, and therefore water on the surface of the dust cover main body is rapidly evaporated, and the situation that more dust adheres to the water is avoided; and in cooperation with the oil storage cotton and a plurality of oil outlet holes arranged in thedust cover main body, internal lubricating oil can be sprayed into the circular groove during rotation, the lubricating function is achieved, the abrasion is reduced, and the rusting speed is reduced.

The invention discloses an anti-rust steel plate heat treatment process, which comprises: (1) pre-heating treatment: placing a steel plate into a heating furnace, and increasing the temperature of the heating furnace to achieve 450-600 DEG C; (2) heat treatment: increasing the temperature of the heating furnace with the placed steel plate to 950-1100 DEG C, and maintaining for 4 h; (3) quenching: placing the taken steel plate into quenching oil, and cooling; (4) tempering: placing the quenched and cooled steel plate into a tempering furnace, increasing the temperature of the tempering furnace to achieve 550-600 DEG C, maintaining for 2 h, taking out the steel plate, placing into a sodium hydroxide and sodium nitrite solution, and carrying out water cooling to a room temperature. According to the present invention, the steel plate produced through the heat treatment process does not easily produce the rust caused by oxidation corrosion, and the heat treatment process of the present invention is the heat treatment process used in the industry.

The invention discloses a bridge prestressed duct grouting material. The bridge prestressed duct grouting material is prepared by blending a component A, cement, water and a micro-expansion water reducer by mass ratio, the mass ratio of the component A to the cement to the water to the micro-expansion water reducer is (0.2 to 0.3):1:(0.33 to 0.45):(0.07 to 0.13), the component A is prepared fromthe following raw materials in parts by mass: 30-40 parts of water, 15-20 parts of an AMP-95 buffer solution, 7-13 parts of acrylate, 8-12 parts of superfine iron oxide red, 7-10 parts of nano-silica,6-10 parts of a stabilizer, 5-8 parts of an initiator, 4-7 parts of a copolymer of vinyl chloride and vinyl isobutyl ether, and ammonium hydroxide. According to the bridge prestressed duct grouting material, the degree of density is increased, the bridge prestressed duct grouting material can react first with the water and oxygen ions and chloride ions in the air, the contact of steel strands andoxidation factors can be effectively avoided, the rusting rate of the steel strands is delayed, and the durability, reliability and safety of prestressed concrete structures are ensured.

The invention discloses a long-distance coal mine excavator arm, and relates to the field of excavator arms. The long-distance coal mine excavator arm comprises a first support arm, wherein one side of the first support arm is connected with a second support arm through a second rotating shaft, and a first air cylinder is installed above one side of the first support arm. According to the long-distance coal mine excavator arm, an oil storage cavity, a reset spring, a telescopic rod, an oil outlet, a leakage-proof plug and a push rod are arranged, when lubricating oil needs to be added to a threaded sleeve and a screw rod, a user starts a motor, the motor works to drive the screw rod to rotate, the screw rod rotates to drive the threaded sleeve to move, and meanwhile, the threaded sleeve drives the push rod to move upwards; after the push rod moves upwards and extends into the oil outlet, the leakage-proof plug can be pushed to move upwards, the leakage-proof plug moves upwards to extrude the telescopic rod and the reset spring, and the reset spring is stressed and compressed, the telescopic rod is stressed and contracted; and after the leakage-proof plug is moved out of the oil outlet, the lubricating oil in the oil storage cavity can flow into the screw rod and the threaded sleeve through the oil outlet, so that the threaded sleeve and the screw rod can be lubricated, and the rusting rate of the screw rod and the threaded sleeve is reduced.

The invention discloses a safe damp-proof and rust-proof power distribution cabinet for power equipment. The invention belongs to the field of power equipment, the power distribution cabinet comprisesa power distribution cabinet body, the bottom end of the power distribution cabinet body is connected with the top ends of struts. The bottom ends of the struts are arranged on base; a control panelis arranged in the power distribution cabinet body; a plurality of groups of zinc blocks are detachably embedded in the bottom end of the power distribution cabinet body; a water tank is arranged below the base, a water outlet pipe is arranged on the water tank, the water outlet pipe is connected with one end of a heating water pipe, the other end of the heating water pipe is connected with a water inlet pipe, a cooling fan is arranged on the inner wall of the power distribution cabinet body, an air exhauster is arranged on the outer wall of the power distribution cabinet body, a support is arranged at the top end of the power distribution cabinet body, a ceiling is arranged on the support, and a fire alarm and an air switch are installed in the power distribution cabinet body. The deviceis prevented from being corroded by accumulated water, steam and the like on the ground, the corrosion speed is reduced, the internal temperature and steam of the device are reduced in time, element aging is prevented from being affected by too high temperature, use safety of the device is guaranteed, and the service life of the device is prolonged.

The invention discloses a peripheral protection device of an unattended power transformation operation and maintenance station in the field of protection devices, which comprises a power transformation box base, peripheral protective guards are arranged around the power transformation box base, long plates are arranged among the peripheral protective guards, a bent rod is arranged on one side surface of the top end of each long plate, and a supporting rod is arranged above the power transformation box base. An iron gauze is arranged between the two peripheral protective guards, a hollowed-out block is arranged on one side of each peripheral protective guard, a connecting plate is arranged in the middle of each hollowed-out block, a support is arranged at one end of each bent rod, a supporting rod is arranged at the top end of each support, and a rotating rod is arranged on the outer wall of one end of each supporting rod. According to the arrangement, splicing is convenient, the working intensity of workers is relieved, the protection range is wide, meanwhile, the rainproof and sunshade functions are achieved, the maintenance cost is reduced, the functions of the protection device are diversified, the transformer substation can be monitored, and warning reminding can be conducted on the workers or foreign personnel.

The invention relates to an angle steel comprising a steel body. The angle steel is characterized in that the steel body is composed of two perpendicular angle steel feet provided with a plurality of oval fixing holes; the outer surface of the steel body is provided with a layer of plated copper, and the outer surface of the plated copper layer is provided with a layer of plated zinc. Thus, the angle steel can be assembled and fixed optionally according to the requirements of construction, the angle steel is convenient and practical to use, troubles and labor force are saved during dissembling and transportation, service life is prolonged, the corrosion speed is decreased, the angle steel has the advantages of corrosion resistance, and the practicality is high.

The invention belongs to the technical field of cement-based materials, and provides an anti-freezing high-ductility cement-based material which comprises cement, high-calcium fly ash, quartz sand, a water reducing agent, a thickening agent, a defoaming agent, polyvinyl alcohol fibers and water in specific mass and volume. The invention further provides a preparation method of the anti-freezing high-ductility cement-based material and application and an application method of the anti-freezing high-ductility cement-based material in a specific hogging moment area of a reinforced concrete continuous beam bridge. The anti-freezing high-ductility cement-based material can effectively reduce permeation of harmful ions such as chloride ions, prolong the initial rust time of steel bars, reduce the corrosion rate of the steel bars, improve the crack resistance and erosion resistance of a hogging moment area, enhance the fatigue resistance of the hogging moment area and prolong the service life of a continuous beam bridge. The structural form of the hogging moment area of the reinforced concrete continuous beam bridge has very high anti-fatigue performance, and the maintenance, repair and detection cost of the bridge in the later period is remarkably reduced.

The invention relates to the technical field of water treatment equipment, in particular to a central rotating equipment support. The central rotating equipment support comprises a base, wherein the top of the base is fixedly connected with a sleeve, the surface of the sleeve is sleeved with a rubber pad, the surface of the sleeve is sleeved with a flange positioned above the rubber pad, the top of the rubber pad is provided with a water blocking hole, the top of the flange is in screwed connection with a screw, the screw penetrates through the water blocking hole and is in screwed connectionwith the base, the inner wall of the base is fixedly connected with two first bearings, the inner edges of the first bearings sleeve a rotating shaft, and the top of the rotating shaft is fixedly connected with a rotating disc. The equipment solves the problems that most connecting pieces such as screws of the support are directly exposed to the outside, when water seepage or water leakage occurs,water can permeate into the gap between a bolt and the flange, the corrosion rate of the bolt is accelerated, the bolt is likely to be difficult to disassemble, and disassembly and maintenance of thesupport are more difficult.