511results about How to "Accelerated corrosion" patented technology

The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.

The invention relates to the technical field of metal materials, in particular to a high-strength steel material for mine roadway support and a preparation method thereof, and the high-strength steel material comprises the following components in percentage by weight: 0.04 to 0.10 percent of C, 0.15 to 0.45 percent of Si, 1.20 to 1.80 percent of Mn, 0.20 to 0.50 percent of Cu, 0.15 to 0.40 percent of Cr, 0.10 to 0.35 percent of Ni, 0.08 to 0.25 percent of Mo, 0.015 to 0.045 percent of Nb, 0.03 to 0.08 percent of V, 0.008 to 0.025 percent of Ti, 0.005 to 0.020 percent of RE and the balance of Fe. The preparation method comprises the steps of smelting and refining, continuous casting, heating, rough rolling, finish rolling, segmented controlled cooling and medium-temperature tempering (450-550 DEG C), R is larger than or equal to 620 MPa, A is larger than or equal to 18%, the yield ratio is smaller than or equal to 0.90, KV at 0 DEG C is larger than or equal to 100 J, and the deep-well high-stress roadway support is suitable for deep-well high-stress roadway support.

The utility model discloses a variable pitch propeller based on light carbon nylon material, the utility model relates to propeller technical field, this utility model, include: center circle, the center circle includes spiral device, through setting up spiral device, adopt light carbon nylon material to make spiral blade, the overall weight of propeller has been reduced significantly, this helps to reduce the energy consumption when the equipment operation, simultaneously, carbon nylon material has good intensity and corrosion resistance, makes propeller also can reliably run stably under the harsh environment, effectively resists abrasion and corrosion, and the flowing body rushes into the chamber, and the movement of trapezoidal plug will drive the pull rod movement, and then makes passive plate produce displacement, finally drives spiral blade to change angle, reaches the effect of self -adaptation variable pitch, this makes propeller can adjust the pitch according to the actual situation of flowing body, when the pressure change in chamber, trapezoidal plug action drives passive plate to move, and compression spring can provide certain buffer and reset force.

This invention discloses a high-temperature alloy with oxidation resistance under high temperature and high pressure and its preparation method. The alloy comprises, by weight percentage, C≦0.12%, Si≦1.0%, Mn≦1.00%, P≦0.04%, S≦0.04%, Cr 20-35%, Ni≧65%, Cu 0.5-2.5%, Fe≦8%, and Y≦0.25%. By adjusting the content of each element and employing a vacuum induction + electroslag remelting smelting process, the high-temperature alloy prepared exhibits excellent oxidation resistance and excellent resistance to corrosion from solutions containing nitric acid, hydrofluoric acid, sulfuric acid, hydrochloric acid, moist chlorine, hypochlorite, chlorine dioxide, ferric chloride, and copper chloride.

The invention discloses a method for treating the inner surface of a stainless steel gas pipe assembly for a semiconductor. The method for treating the inner surface of the stainless steel gas pipe assembly for the semiconductor comprises the following steps that firstly, the inner surface of the stainless steel gas pipe assembly is subjected to basic pretreatment, so that the surface roughness of the stainless steel gas pipe assembly reaches the precision capable of being subjected to finish machining; secondly, multi-stage mechanical polishing is carried out through grinding materials with the granularity gradually reduced, so that the roughness of the inner surface of the stainless steel gas pipe assembly reaches the target precision; and thirdly, the inner surface of the stainless steel gas pipe assembly is treated through electrolytic polishing, and a high-precision passive film is generated on the inner surface of the stainless steel gas pipe assembly. In this way, the smoothness and corrosion resistance of the inner surface of the stainless steel gas pipe assembly can be effectively improved, the overall service life of the pipeline is prolonged, the influence of the pipeline on high-purity gas is remarkably reduced, and the strict requirement of the semiconductor tip technology manufacturing procedure for gas purity is met.

The application discloses a WC+TiC particle reinforced high-entropy alloy coating and a preparation method thereof, and belongs to the field of coating preparation. The coating comprises a bottom layer, and the chemical components and mass percentages of the bottom layer are as follows: carbon: 0.1-0.5%, boron: 1-1.3%, chromium: 19-21%, nickel: 21-24%, silicon: 1-1.5%, molybdenum: 8-10%, cobalt: 22-24%, sulfur: 0.005-0.015%, phosphorus: 0.015-0.045%, and the balance is iron and inevitable impurities; and a working layer, and the chemical components and mass percentages of the working layer are as follows: WC: 15-25%, X: 1.5-4.5%, and the balance of components and the proportion between the components are the same as those of the bottom layer, wherein the X is TiC particles coated with Ni on the surface. The method is used for preparing the coating, and compared with a conventional coating, can effectively improve the wear resistance and corrosion resistance of the coating, and prolong the service life of equipment.

The application provides a steam delivery pipeline leakage detection system, which comprises a metal conducting rod fixedly connected to the outer wall of a steam delivery pipeline, a sensor connected to the metal conducting rod, a signal analyzer electrically connected to the sensor, and a DCS control center electrically connected to the signal analyzer, and the sensor is used for collecting the vibration sound signal of the metal conducting rod. The steam delivery pipeline leakage detection system of the application can accurately and timely determine the leakage and the position of the leakage point by using the metal conducting rod connected to the steam delivery pipeline to transmit the vibration sound generated by the intense friction between the leakage medium and the pipeline wall, and the sound signal is not obviously attenuated in the transmission process due to the solid medium transmission, the transmission distance is long, and the sound signal is not easily interfered by other signals, the false positive rate of the leakage detection is effectively reduced, the operation and maintenance cost of the steam delivery pipeline is significantly reduced, and the industrial safety is improved.

The utility model discloses an unmanned aerial vehicle-mounted radar hanger structure with a damping function, which relates to the technical field of unmanned aerial vehicles and comprises an unmanned aerial vehicle body, a base net rack and a pull net rack. The base net rack is connected to the bottom surface of the unmanned aerial vehicle body through bolts, and the lower part of the base net rack is provided with a sunken upper mounting groove; the pull net rack is arranged below the base net rack, the edge of the pull net rack is connected with the base net rack through a plurality of elastic connecting pieces, the upper portion of the pull net rack is provided with a sunken lower installation groove, and the lower installation groove corresponds to the upper installation groove and is used for being connected with the airborne radar in a clamped mode. Through the elastic connecting pieces between the base net rack and the towing net rack and the elastic supporting pieces on the towing net rack, vibration and impact generated in the flying process of the unmanned aerial vehicle can be effectively absorbed and buffered, precise equipment such as airborne radar can be protected, the performance of the unmanned aerial vehicle is improved, and the service life of the unmanned aerial vehicle is prolonged.

This utility model provides a stainless steel air conditioning pipe, relating to the field of air conditioning pipe technology, comprising: a straight air conditioning refrigerant pipe, wherein an air conditioning refrigerant elbow is connected to the side end of the straight air conditioning refrigerant pipe via a pipe fitting; a stainless steel outer pipe layer is provided on the outer side of the straight air conditioning refrigerant pipe, and a copper inner pipe layer is laminated on the inner side of the stainless steel outer pipe layer; the surface of the copper inner pipe layer is coated with a nano-modified coating and a PTFE inner lining layer; the pipe fitting is welded to the copper inner pipe layer via a connecting inner pipe; and a pipe clamp is fixed to the outer end of the pipe fitting. This utility model solves the problem in the prior art where the copper pipe and stainless steel pipe are welded together as a single piece, resulting in inconvenience during the transportation and installation of stainless steel air conditioning pipes.

The invention discloses a bamboo charcoal fiber cloth-based composite material as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic shielding materials. The bamboo charcoal fiber cloth-based composite material comprises: a base cloth, which is a bamboo charcoal fiber cloth subjected to oxidation modification and activation treatment by TEMPO (2, 2, 6, 6-tetramethylpiperidine-1-oxygen radical); the gradient copper layer is chemically plated on the surface of the base cloth; the nickel layer is chemically plated on the surface of the gradient copper layer; wherein the density of the base cloth side copper layer is smaller than that of the nickel layer and the copper layer. The bamboo charcoal fiber cloth is subjected to surface treatment modification through a special process, and meanwhile, a gradient copper layer and a gradient nickel layer are formed on the surface of the bamboo charcoal fiber cloth, so that the bamboo charcoal fiber cloth-based composite material with light weight, structural stability and excellent electromagnetic shielding performance is prepared, and the requirements of flexible and broadband electromagnetic shielding application are met.

The application provides a regeneration method of halogenated nitrobenzene continuous hydrogenation catalyst, and relates to the technical field of fixed bed halogenated nitrobenzene hydrogenation. The regeneration method mainly comprises the following steps: using alcohol, alkali, petroleum ether and ethyl acetate to preliminarily clean the bed layer, removing azo compounds and other pollutants on the surface of the catalyst by using the special properties of ionic liquids, and then completing the regeneration of the catalyst through the steps of pickling, precious metal solution treatment and drying. The application overcomes the defects of the prior art, has the advantages of simple operation, mild conditions and low cost, realizes the in-situ removal of surface impurities such as reaction intermediates and azo compounds on the catalyst surface without damaging the structure of the catalyst and disassembling the catalyst, further supplements the lost metal active components, and can effectively restore the catalyst activity.

This utility model relates to the field of photovoltaic power station cleaning technology, and in particular to a cleaning and maintenance vehicle for photovoltaic power station construction. It solves the problem that existing technologies generate a large amount of waste and dust during photovoltaic power station construction, as well as water stains, all of which require timely cleaning. However, manual cleaning is currently time-consuming and labor-intensive. The photovoltaic power station construction cleaning and maintenance vehicle includes a mobile frame, characterized in that a support plate is fixedly installed on the top of the mobile frame. This utility model, through the combined design of lateral and longitudinal cleaning components, utilizes the meshing transmission of a first bevel gear and a second bevel gear to achieve synchronous linkage between the lateral and longitudinal cleaning brushes. This allows for cross-cleaning of waste, dust, and water stains in the photovoltaic power station construction area from different directions, significantly improving cleaning coverage and cleaning effect, and solving the problem of incomplete cleaning in traditional single-direction methods.

The invention relates to the technical field of petroleum drill rods, in particular to a drill rod joint gradient coating and a preparation method and a coating method thereof. The gradient coating of the drill rod joint comprises a bottom layer, a middle layer and a surface layer, the bottom layer, the middle layer and the surface layer are sequentially stacked on the surface of a drill rod connector base body which is subjected to plasma electrolytic polishing-micro-arc oxidation composite pretreatment and silanization bridging. According to the invention, the whole process optimization of anchor pattern pretreatment-coating coating-curing molding of the drill rod thread is realized, through unique composition design and a spraying process, the comprehensive properties of lubrication, wear resistance and rust prevention of the coating are improved, continuous protection and performance recovery of the thread surface under dynamic load are realized, and the service life of the thread is prolonged. The service life of the drill rod is effectively prolonged, the maintenance cost is reduced, the problem that shackling cannot be conducted in the using process can be effectively solved, and heavy metal pollutants cannot be generated in the technological process.

The utility model discloses a measuring tool with two-way scale, which relates to the measuring tool field, and comprises a graduated scale and an infusion joint, the front and back surfaces of the graduated scale are provided with dial gauge bodies, the back surfaces of the upper and lower sides of the graduated scale are symmetrically provided with two threaded holes, and the inner part of the back surface of each dial gauge body is provided with a groove. Two mounting sleeves are movably connected to the back of the graduated scale, bolts are connected to the interiors of the upper side and the lower side of each mounting sleeve in a threaded mode, and fixing cylinders are fixedly installed on the two sides of each mounting sleeve. A sliding groove is formed in the fixing cylinder, and a sliding plate is arranged in the sliding groove. The moving distance of colored liquid in the transparent guide pipe can be accurately measured through the graduated scale and the dial gauge body, the transparent guide pipes of different diameter specifications can be fixedly installed through the installation sleeve and the limiting plate, follow-up measurement and detection are facilitated, and the transparent guide pipes can be fixed and protected through the protection pad.

This utility model discloses a pipeline protection channel, characterized by comprising a plurality of channel plates connected in sequence. Each channel plate has its two sides bent upwards to form side guards. The channel plates and side guards form a receiving groove, within which are arranged a plurality of support plates arranged side-by-side in sequence. The support plates are fixedly connected to the channel plates and side guards, and each support plate has a plurality of pipe grooves. One end of each channel plate is fixedly connected to a connector, and the other end has a connector groove. The channel plates, side guards, support plates, and connectors are integrally molded from SMC sheet molding compound. This utility model's pipeline protection channel, integrally molded from SMC sheet molding compound, combines high strength and corrosion resistance, is lightweight, corrosion-resistant, and has a long service life. The reinforcing rib design of the channel plates and side guards significantly improves structural strength and reduces the risk of deformation and damage caused by external impacts. The dual design of the connector, connector groove, and wire connection enhances connection stability, simplifies the installation process, and can adapt to complex terrains such as bends and height changes.

A kind of oilfield polymer injection concentric three-channel oil pipe, it includes: coaxially nested three-layer pipe body: outer tube is set in the middle layer pipe of outer tube, and center tube is set in the middle layer pipe;Three independent channels: the first channel is formed by the inner cavity of the center tube, the annular space between the center tube and middle layer pipe forms the second channel, the annular space between the middle layer pipe and outer tube forms the third channel;Channel bridge assembly: be provided with at pipe body both ends, including upper annular channel bridge and lower annular channel bridge;The channel bridge assembly is provided with axial through hole and radial opening respectively connecting first channel, second channel, third channel;Dismountable sealing connection structure: the utility model novel structure, through the unique three-channel design, three different oil layers can be simultaneously carried out three-layer quality boosting injection polymer, improve the pertinence and effectiveness of polymer injection liquid, and then improve oil recovery.

The present application relates to the technical field of ceramic coating, especially to a micro-nano structure ceramic coating and its application on the reaction furnace of zircon sand boiling chlorination method, aiming at solving the problems of weak bonding force between the existing protective coating and the substrate, poor thermal shock resistance and easy failure in long-term high-temperature chlorine environment; the present application constructs a nano-wire reinforced micro-nano structure transition layer on the surface of porous corundum brick substrate in situ, and sequentially constructs a lanthanum phosphate bonding layer and a yttrium stabilized zirconium oxide barrier layer on the transition layer; the design utilizes the mechanical anchoring effect of micro-nano structure and the strong chemical bonding ability of lanthanum phosphate to realize the firm combination of the coating and the substrate; the dense characteristics of the zirconium oxide layer provide ultimate protection; the method significantly improves the overall anti-peeling ability and long-term corrosion resistance of the coating system.

The invention discloses a low-expansion three-temperature cold and hot plate and a preparation method, and belongs to the field of precise alloy components. The cold and hot plate is made of titanium-niobium-based alloy, the titanium-niobium-based alloy comprises, by atomic percent, 25%-35% of Nb, the total content of V and / or Ta smaller than or equal to 3% and the balance Ti, the titanium-niobium-based alloy comprises a three-temperature structure of a low-temperature adaptation area, a normal-temperature stable area and a high-temperature tolerance area, the thickness of the titanium-niobium-based alloy ranges from 1.5 mm to 2 mm, and the surface of the titanium-niobium-based alloy is provided with a nitride layer or a passive film. The preparation method comprises the steps of burdening, 2-3 times of vacuum consumable smelting, hot forging, hot rolling, partition cutting, pre-deformation regulation and control, solid solution quenching, cold rolling finishing, splicing forming and the like, and vacuum stress relief annealing and dual performance detection are matched. The method is suitable for scenes such as chip packaging and precision detection, and is low in cost and high in qualified rate.

The application belongs to the technical field of electromagnetic wave absorbing composite materials, and discloses a high-strength electromagnetic wave absorbing composite material and a preparation method thereof.The high-strength electromagnetic wave absorbing composite material is composed of a wave-transparent layer, a loss layer and a reflection layer, wherein the wave-transparent layer is prepared from glass fiber cloth, quartz fiber cloth, epoxy resin, wave-absorbing polyurethane foam and ultraviolet absorber, the loss layer is prepared from silicon carbide, graphite, conductive fiber, corrosion inhibitor and antioxidant, and the reflection layer is prepared from carbon fiber, graphite, copper powder and preservative.The wave-transparent layer obtained by adding ultraviolet absorber and epoxy resin can enhance the corrosion resistance and light resistance of the wave-transparent layer, the loss layer obtained by adding corrosion inhibitor and antioxidant can enhance the corrosion resistance of the loss layer, and the reflection layer obtained by adding preservative can resist corrosion at the connection between the electromagnetic wave absorbing composite material and other articles, so as to enhance the comprehensive strength of the electromagnetic wave absorbing composite material.

The utility model discloses a kind of multifunctional steel clamp connecting structures of cooperation buckle lock type hemming press plate, including steel clamp, metal press plate and connecting pedestal, connecting pedestal is connected with metal press plate first using bilateral buckle pressure mode, steel clamp is clamped on metal press plate, the steel clamp includes bottom support end, middle clamping portion and upper portion connection fastening end arranged in order from bottom to top, metal press plate is provided with first step and second step, first step is clamped with middle clamping portion, bottom support end falls on second step.The utility model sets up steel clamp on metal press plate, clamps metal press plate, can constrain the tendency of metal press plate to open to both sides when being subjected to upward wind suction, can significantly improve the wind resistance of buckle lock type metal press plate, and upper portion connection fixed end can also provide the platform of installing additional decorative plate or photovoltaic module.

The application discloses an aluminum cover forming method and an aluminum cover and relates to the technical field of aluminum cover manufacturing. The aluminum cover forming method comprises the following steps: S1, placing an aluminum plate into an initial forming die, and forming a macro-domain large curved surface in the middle of the aluminum plate and an initial foot position with the same height as a required foot position on the circumferential edge of the aluminum plate through the extrusion force of a press machine and the initial forming die; S2, placing the aluminum plate preliminarily formed in S1 into a final forming die, and further forming the macro-domain large curved surface formed in the middle of the aluminum plate into a final shape at room temperature through the final forming extrusion pressure of the press machine, and flowing and filling the edge cavity of the final forming die to form an edge through the extrusion of the final forming die, and forming a final foot position shape through the extrusion of the initial foot position; and S3, opening the die to take out the formed aluminum cover. The production of the large-size foot position height aluminum cover can be realized at room temperature, the energy consumption is low, and the aluminum cover is simple and convenient to manufacture.

The utility model discloses an ultra-thin multilayer silica gel braided tube, which relates to the technical field of silica gel braided tubes and comprises a silica gel braided tube body, a connector assembly is arranged at one end of the silica gel braided tube body, a butt joint assembly is arranged at the other end of the silica gel braided tube body, and the connector assembly is matched with the butt joint assembly. The silica gel braided tube body comprises a pipeline body, an anti-sticking layer is arranged on the inner wall of the pipeline body, and the anti-sticking layer is used for preventing adhesion between the inner wall of the silica gel braided tube body and a conveying medium; the butt joint assembly comprises a second connecting cavity tube fixedly connected to one end of the silica gel braided tube body; the connector assembly comprises a first connecting cavity tube fixedly connected to one end of the silica gel braided tube body, and a positioning rod is fixedly connected to one side of the first connecting cavity tube, so that the silica gel braided tube bodies, the connector assembly and the butt joint assembly are matched together, and the two silica gel braided tube bodies can be quickly assembled and disassembled; the working efficiency of the device is improved, and the requirements of more customers are met.

One embodiment of the present invention provides a hot-dip galvanized steel material comprising a base steel material and a hot-dip galvanized layer disposed on the surface of the base steel material. The chemical composition of the hot-dip galvanized layer, by mass%, includes: Al: 10.00–30.00%; Mg: 3.00–12.00%; Sn: 0–2.00%; Si: 0–2.50%; Ca: 0–3.00%; Ni: 0% or more and less than 0.25%; and Fe: 0–5.00%, with the remainder consisting of Zn and impurities. The metallographic structure of the hot-dip galvanized layer contains an α phase with a grain size of 0.5–2 μm at 5–45 area % and a MgZn2 phase at 15–70 area % . Among the α phases with a grain size of 0.5–2 μm, the α phase has a (111) relative to the adjacent MgZn2 phase. α / / (0001) MgZn2 The area fraction of the α phase with orientation relationship is 25%–100%.

The invention discloses a cavitation shot peening surface strengthening method and system based on cooperation of high hydrostatic pressure and spherical focused ultrasound. The method comprises the following steps: establishing and maintaining a hydrostatic pressure environment higher than 0.1 MPa in a high-pressure processing cavity filled with a degassing liquid medium; the to-be-machined surface of the workpiece is positioned in a sound field focal region of the spherical focused ultrasound transducer; and in the high hydrostatic pressure environment, a transducer is driven to work so as to generate a cavitation bubble group in a space confinement range in a focal region of the transducer, and meanwhile, the workpiece is controlled to move according to a preset path, so that cavitation collapse impact acts on a target region on the surface of the workpiece. The device comprises a high-pressure processing cavity, a spherical focused ultrasonic transducer, a multi-degree-of-freedom movement mechanism and a control system. Through cooperation of high hydrostatic pressure constraint and the spherical focusing sound field, precise localization and energy strengthening of the cavitation effect are achieved, a plastic deformation layer can be efficiently and controllably introduced to the surface of a metal material, the surface hardness can be remarkably improved, a residual compressive stress layer is formed, surface layer grains are refined, and the method is suitable for precise surface strengthening of complex components.

The application relates to a high-strength corrosion-resistant niobium-free zirconium alloy and a manufacturing method thereof, and belongs to the field of nuclear engineering materials. The high-strength corrosion-resistant niobium-free zirconium alloy contains 0.7-1.5% of Sn, 0.1-0.4% of Fe, 0.15-0.35% of Cr, 0.02-0.08% of Ni, 0.1-0.18% of O, 0.001-0.1% of Ge and 0.001-0.15% of Cu in terms of weight percentage; the balance is Zr and inevitable impurities; in terms of atomic number ratio, 1<=Fe / Cr<=1.8 and 0.13<=Ni / Fe<=0.3. The alloy has good corrosion resistance, can prevent the occurrence of pimple-shaped corrosion, and has good resistance to uniform corrosion in a high-temperature water environment.

The application relates to a scale-inhibiting alloy and a preparation method thereof and a scale-inhibiting sheet manufactured from the scale-inhibiting alloy. The scale-inhibiting alloy comprises the following components: 55wt%-70wt% of Cu, 15wt%-30wt% of Zn, 5wt%-15wt% of Ni, 0.5wt%-3wt% of Si, 1wt%-5wt% of P, 0.001wt%-0.05wt% of a modifying element, and the balance of inevitable impurities, wherein the modifying element is one or more of B, Ti and Zr. The scale-inhibiting alloy adds the Si element for strengthening, so as to improve the mechanical properties and corrosion resistance; the Zn element is added as a negative electrode and the P element is added as a positive electrode, the alloying forms alpha phase+beta phase+multi-element brittle compound phase, can well excite the active current, and prevents the generation of water scale. The scale-inhibiting alloy has low production cost, meets the comprehensive requirements of cost, processing performance, corrosion resistance, mechanical properties, health and market acceptance of water treatment products, and has a good application prospect.

The invention relates to the technical field of disinfectants, in particular to a high-stability composite peracetic acid disinfectant and a preparation process thereof, and the high-stability composite peracetic acid disinfectant comprises the following components in percentage by mass: 4-6% of peracetic acid, 10-15% of hydrogen peroxide, 15.0-25% of acetic acid, 0.1-0.3% of terpolymer and the balance of water. The stability of PAA and HO is improved, and the decomposition of PAA and HO in the storage process is reduced, so that the durability of the sterilization efficiency of the disinfectant is ensured.

This utility model discloses a combined signal shielding cable, comprising a shielding paper layer, a PTFE tape layer covering the outer periphery of the shielding paper layer, a water-blocking layer covering the outer periphery of the PTFE tape layer, a tinned copper wire braided layer covering the outer periphery of the water-blocking layer, an outer insulation layer covering the outer periphery of the tinned copper wire braided layer, and a plurality of first conductor assemblies and a plurality of second conductor assemblies disposed within the shielding paper layer. The spaces between the plurality of first conductor assemblies, the plurality of second conductor assemblies, and the shielding paper layer are filled with a plurality of dispersed bulletproof wires and a plurality of fiberglass yarns. This utility model can adapt to complex and changing usage environments. By providing a multi-layered protective structure around the first and second conductor assemblies, it improves the cable's resistance to swaying, bending, corrosion, and aging, thereby extending the cable's service life.

The invention discloses an oil cooler space ring and a high-precision manufacturing method thereof.The oil cooler space ring comprises an annular body, an oil through hole is formed in the center of the annular body, four positioning bosses are evenly distributed at one end of the annular body in the circumferential direction, and a first sealing groove is formed in the peripheral face of the annular body; a second sealing groove is formed in the inner circumferential face of the annular body, a thread auxiliary groove is formed in the oil through hole, a flow guide groove is formed in the end, away from the positioning boss, of the annular body and distributed in a spiral shape, the positioning boss is used for axial positioning and circumferential positioning of the space ring in the oil cooler, and the assembly precision is guaranteed. The flow guide grooves are formed in the end face of the annular body and distributed in a spiral shape, the number of the flow guide grooves is six, the spiral flow guide grooves can guide a cooling medium to form ordered spiral flow on the surface of the space ring, the contact area of the cooling medium and the space ring is increased, the contact time of the cooling medium and the space ring is prolonged, and therefore the heat exchange efficiency is improved.

The application relates to the coating technical field and discloses a composite coating as well as a preparation method and application of the composite coating. The composite coating comprises an inner layer, an outer layer and a bonding layer arranged between the inner layer and the outer layer; the outer layer is a basalt fiber cloth; and the preparation raw materials of the inner layer comprise 100 parts by weight of a first epoxy resin, 10-40 parts by weight of chopped basalt fibers, 5-30 parts by weight of hexagonal boron nitride, 0.5-5 parts by weight of a coupling agent, 1-3 parts by weight of a surfactant, 0.5-2.5 parts by weight of an antioxidant and 1-15 parts by weight of a curing agent. The composite coating provided in the application can significantly enhance the bonding strength between the composite coating and a base body through the interaction between the various components, can avoid the falling-off of the composite coating, can significantly improve the acid resistance and halogen water corrosion resistance of the composite coating, and is suitable for industrial popularization.