112 results about "Steel wool" patented technology

Intermolecular interactions and molecular chain mobility are improved when a hydrocarbon-terminal-group-containing compound represented by formula (1) is used as a surface protective agent for a non-fluorine-based material, and a surface treatment agent containing the compound can form a cured coating film having excellent water repellency, slipperiness, ease of soil removal, and abrasion resistance, in particular, steel wool abrasion resistance. (R is a C1-60 monovalent hydrocarbon group, Z is a divalent connecting functional group containing at least one selected from O, N, S, and Si, Y is a C1-30 divalent hydrocarbon group, A is a monovalent reactive group, and k is 1-3.)

The invention discloses an electronic component wear resistance testing machine, and relates to the technical field of electronic component testing. By arranging the abrasion testing head quick-changing mechanism, a rubber friction testing assembly, a steel wool friction testing assembly, an alcohol friction testing assembly and a standby testing assembly which are high in use frequency in the abrasion resistance testing process can be preset in advance, and the friction testing assemblies of the corresponding types can be quickly selected according to testing requirements before abrasion resistance testing is conducted on electronic elements; the positions of different types of wear-resistant test heads at different positions can be switched, compared with a traditional wear-resistant test head dismounting and replacing mode, the wear-resistant test head replacing speed is higher, the service time is shorter, operation is easy, the test piece efficiency of electronic elements can be improved, and the test efficiency of the electronic elements can be improved. The cleaning mechanism can utilize the suction power assembly to suck external air and purge high-speed flowing air to the electronic element in the test through the air nozzle, so that the effect of cleaning chippings falling off from the wear-resistant test surface of the electronic element is achieved.

The utility model discloses a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column, which comprises a support table, a glass U-shaped tube and a quartz tube, a high-frequency induction heater is arranged on the upper side of the support table, a heating induction coil of the high-frequency induction heater is sleeved on the quartz tube, the quartz tube is horizontally arranged, and the glass U-shaped tube is arranged on the quartz tube. A first sealing plug and a second sealing plug are respectively plugged at the two ends of the quartz tube, heat preservation steel wool is arranged at one section, close to the first sealing plug, of the interior of the quartz tube, and a heating iron ring is arranged in the center of the interior of the quartz tube and is positioned in a heating induction coil of the high-frequency induction heater. According to the utility model, through the design of the auxiliary magnetic suspension system and the U-shaped liquid column, the friction between the piston and the pipe wall is greatly reduced, the energy loss in the mechanical energy conversion process is effectively reduced, and the working principle of the Stirling heat engine and the application of the second law of thermodynamics can be intuitively displayed.

The present application belongs to the field of advanced coating and preparation, and particularly relates to a high-transparent and scratch-resistant multifunctional antistatic coating and a preparation method thereof. The present application provides a high-transparent and scratch-resistant antistatic coating, raw materials of the antistatic coating comprising fluorion-containing silsesquioxane monomer, functional monomer and catalyst; wherein the functional monomer is a crosslinking agent or an anti-crystallization agent. The coating obtained by the present application has a light transmittance of >98% (550 nm); a surface pencil hardness of greater than 9H, no scratches after more than 1000 times of steel wool rubbing; a surface resistivity of about 10 8 ~10 9 Ω / sq, and a fast electrostatic discharge rate.

The utility model discloses a demagnetizing device, which relates to the technical field of superconducting magnetic separators, is used for demagnetizing mineral particles remained on a superconducting magnetic separator and adhered on magnetic conductive stainless steel wool inside a separating tank, and comprises a magnet ring, an electromagnetic coil and a control cabinet, and an electromagnetic coil is arranged at the top of the magnet ring, is electrically connected with the control cabinet, is electrified and generates a reverse magnetic field under the interaction of the magnet ring. The device has the effects of solving the problem of adhesion of mineral particles, improving the flushing efficiency and guaranteeing the treatment quality of subsequent products.

The utility model discloses a continuous vacuum evaporation device for an anti-fingerprint film. The continuous vacuum evaporation device comprises a vacuum film coating machine body and a film coating main roller of a roll-to-roll vacuum film coating machine, wherein the film coating main roller is arranged in the middle of the vacuum film coating machine body; an evaporation boat is arranged at the bottom position of a coating main roller of the opposite-roll vacuum coating machine, a steel wool rope winding device is arranged on the side face position of a guide wheel, a steel wool rope unwinding device is arranged on the steel wool rope winding device on the right side, and a steel wool rope body is arranged in the middle positions of the steel wool rope winding device, the guide wheel and the evaporation boat. The bottom of the evaporation boat is connected with a power supply connecting power supply, the steel wool rope body also travels in a winding mode according to process requirements, and the fingerprint-proof liquid medicine on the steel wool rope body can be continuously evaporated to the bottom of a coating main roller of the opposite-winding vacuum coating machine under the condition that the evaporation boat is heated. After the device is improved, the roll-to-roll vacuum coating machine can continuously evaporate the anti-fingerprint film for a long time.

The utility model provides a steel wire cotton rolling machine which comprises an upper roller used for rolling cotton and a rotating mechanism driving the upper roller to rotate, the rotating mechanism comprises a cantilever shaft arranged on a bearing seat, a limiting supporting block is arranged on the side, close to the bearing seat, of the cantilever shaft, and a detachable fixing block used for fixing the upper roller is arranged on the other side of the cantilever shaft. According to the steel wire cotton rolling machine, the cantilever shaft is arranged on the rotating mechanism, and the upper roller is inserted into the cantilever shaft, so that the situation that after the two sides of the upper roller lose support, the upper roller needs to be supported by hands, otherwise, the upper roller can fall off, and the steel wire cotton rolling machine is very convenient to use. And the limiting supporting blocks and the fixing blocks are arranged on the left side and the right side of the upper roller, so that the size of the upper roller during installation is reduced, and shaking during rotating movement is avoided.

A disintegrating slag collecting type precise cutting device for steel wool comprises a feeding seat and a collecting seat connected with the feeding seat, the feeding seat is provided with an adjusting tensioning structure, a pressure feeding structure and a cutting structure, and the cutting structure is provided with a blowing structure and a collecting structure which are matched with the cutting structure. By the adoption of the structure, tensioning fit is achieved in the feeding process, it is guaranteed that materials are fed and conveyed evenly and stably, displacement is not prone to occurring in the pressing feeding and machining process, and the cutting quality is improved; disintegrating slag and waste materials generated in the cutting process are rapidly blown and collected, continuous machining and using are not affected, and cleaning is convenient and rapid; the device is simple and reasonable in overall structure, precise and stable in matched machining and high in practicability.

The invention relates to the field of automobile heat insulation films, in particular to a high-hardness scratch-resistant automobile film which comprises an automobile heat insulation film, the outer surface of the automobile heat insulation film is coated with a Ta-C coating, the Ta-C coating is prepared through a filtered cathode vacuum arc technology, and the Ta-C contains lithium niobate microcrystal particles. The ta-C is applied to the outer surface of the automobile heat insulation film, and the surface hardness of the heat insulation film is greatly improved from pencil hardness 2H to 6H; in a steel wool friction test, the friction frequency is increased from 200 times to 2000 times, and the scratch resistance of the automobile heat insulation film is greatly enhanced; the thermal insulation effect of the lithium niobate-containing ta-C is twice that of the lithium niobate-free ta-C, and the remarkable advantages of the lithium niobate-containing ta-C coating in the thermal insulation aspect are fully proved; when measured under the incident light wavelength of 550 nm, the light transmittance of the cold film without ta-C is 70%, the light transmittance of the cold film with ta-C is 69%, the influence of Ta-C on the light transmittance is very small and is within 1%, and the good light transmittance performance of the automobile heat insulation film is guaranteed.

This utility model relates to the field of steel wool processing equipment. More specifically, this utility model relates to a steel wool quantitative dispensing device, including a conveying mechanism, a cutting mechanism, and a winding mechanism arranged sequentially along a first direction, and further including: a guide plate, which is rotatably disposed between the cutting mechanism and the winding mechanism, one end of the guide plate being located below the discharge end of the cutting mechanism, and the other end extending obliquely downward to above the winding position of the winding mechanism; and a positioning detection mechanism, whose detection position is located at the winding position of the winding mechanism. This utility model provides a steel wool quantitative dispensing device that can quickly realize automatic quantitative dispensing of steel wool, improving the quality and efficiency of steel wool dispensing.

The utility model relates to steel wool processing equipment field, more specifically, the utility model relates to a kind of steel wool rolling machine, comprising: fixed carousel, its one end is connected with rotating mechanism transmission;Expansion chuck, its coaxial setting is in the other end of fixed carousel;Moving carousel, it is coaxially arranged with fixed carousel, and the end close to fixed carousel is equipped with the top block corresponding with expansion chuck;Linear drive mechanism, it is rotatably connected with the end of moving carousel away from fixed carousel, and moving carousel is driven to be close to or away from fixed carousel.The utility model provides a kind of steel wool rolling machine, and the limiting space formed by moving carousel and fixed carousel is positioned to steel wool band, ensure that steel wool band can be evenly rolled on paper core cylinder to form steel wool roll, ensure the quality of steel wool roll, improve the rolling rate of influence steel wool roll.

The present application relates to the field of paint technology, in particular to a fluorosilicon modified super self-cleaning nano paint, a preparation method and application thereof.The paint is prepared from 25-40 parts of fluorosilicon modified nano silicon dioxide dispersion liquid, 1-3 parts of fluorosilicon modified acrylic resin, 1-3 parts of hydrophilic resin, 0.1-2 parts of silane coupling agent and 50-70 parts of solvent system.The super hydrophobic coating prepared by using the paint is tested by a steel wool friction tester, the load is 100g, and the hydrophobic angle is still above 150° after 1300 times of friction;the water impact resistance is tested by using a 1.2m high, 300mL water flow impact test, and the coating can resist water impact for more than 30 times;the light transmittance of the coating reaches 75%.Moreover, the construction method only needs single layer spraying, and the construction is simple.

The utility model relates to a tea boiler easy to clean. The tea boiler easy to clean comprises an inner partition piece and an outer barrel body which is used for being placed in a water boiling kettle, and a top end opening of the outer barrel body is exposed out of a kettle opening of the water boiling kettle. The outer barrel comprises a barrel side wall and a barrel bottom wall; a barrel bottom wall hole is formed in the barrel bottom wall; the edge of the cylinder bottom wall extends downwards to form a supporting edge, the bottom edge of the supporting edge is located on the same plane, and the inner partition piece comprises a layer partition body and an integrated center pipe. The interlayer body is fixedly connected with the center pipe, the center pipe penetrates through the interlayer body so that the top end and the bottom end of the center pipe can be located above and below the interlayer body respectively, the center pipe abuts against the cylinder bottom wall, and the cylinder bottom wall hole is completely located in the bottom end hole in the overlook view. The cleaning device has the advantages that cleaning tools such as steel wire balls can be easily placed in the barrel side wall to clean the barrel side wall and the barrel bottom wall.

The utility model discloses an anti-dazzle and anti-reflection optical film which comprises a base material layer, an anti-dazzle coating, a high-refractive-index coating and a low-refractive-index coating which are sequentially stacked. The elongation at break of the anti-dazzle coating is smaller than 5%, the water drop angle is smaller than 80 degrees, the dyne value is larger than 34, the wear resistance of steel wool is larger than or equal to 1000 times, the haze is 5%-8%, the indentation modulus is larger than 7 GPa, the refractive index of the high-refractive-index coating is 1.64-1.75, the water drop angle is smaller than 80 degrees, and the dyne value is larger than 34. The refractive index of the low-refractive-index coating is 1.35-1.45, and the surface water drop angle is larger than or equal to 110 degrees. The anti-dazzle and anti-reflection optical film provided by the utility model has better anti-reflection performance and excellent anti-dazzle performance, can resist wear for more than 2000 times, greatly prolongs the service life of a mobile phone protective film, can better meet the requirement of folding a mobile phone screen protective film, and has a very good application prospect.

This invention relates to a zero-discharge treatment system for high-salinity concentrated wastewater, comprising at least a first and a second sedimentation tank. A magnet assembly is provided in at least the first sedimentation tank. The upper part of the first sedimentation tank has a baffle plate with a conical through-hole at its center and a corresponding turbulence-inducing mechanism positioned above the baffle plate. The baffle plate is located above the magnet assembly. The baffle plate has at least one annular channel within its body, and a spray nozzle communicating with the annular channel is formed on its upper surface. The turbulence-inducing mechanism includes a chassis with a rotating shaft and a groove at its upper part, and an electromagnet. Multiple rings of steel wool are provided on the lower end face of the chassis. Each ring of steel wool includes multiple steel brushes. The upper ports of the spray nozzles correspond to the spaces between two adjacent rings of steel wool. The upper port of the groove is higher than the upper port of the first sedimentation tank, and multiple strip-shaped through-holes are provided on the wedge-shaped portion at its root. The electromagnet body of the electromagnet is located within the chassis body. This application can improve problems such as easy scaling and rapid membrane fouling in the zero-discharge treatment of high-salinity concentrated wastewater.

A high-durability smokeless barbecue charcoal and its preparation method are disclosed. The raw materials for preparing the high-durability smokeless barbecue charcoal include the following components: wood, modifier, adhesive, aluminosilicate ceramic fiber, steel wool, and anhydrous ethanol. The modifier includes graphite, bamboo charcoal, and barium sulfate. The adhesive includes carboxymethyl cellulose, lignin, and plant adhesives. The weight of the aluminosilicate ceramic fiber is 1% to 12% of the weight of the wood, and the weight of the steel wool is 4% to 17% of the weight of the wood. The high-durability smokeless barbecue charcoal provided by this invention undergoes anhydrous ethanol degreasing treatment after charcoal preparation, which can improve combustion efficiency, reduce the smoke generated during combustion, and prevent pulverization after combustion, thereby further reducing dust generation. This results in a barbecue charcoal that is essentially smokeless and produces no dust, meeting user needs.

The tail gas mixer comprises a mixing pipe, steel wool and a vent pipe, a tail gas inlet is formed in the side wall of the mixing pipe, the steel wool is installed in the mixing pipe, and the vent pipe is installed on the steel wool and penetrates through the two opposite end faces of the steel wool in the height direction of the mixing pipe. Tail gas can enter the mixing pipe through the tail gas inlet and then flow to the outlet of the mixing pipe through the vent pipe and the steel wool. The tail gas mixer provided by the utility model can improve the air permeability of the steel wool, so that the back pressure of the mixing pipe is reduced.

The invention relates to the technical field of pressure detection, in particular to a concrete test block pressure detection device for construction project quality detection, which comprises a control box, a shoveling and scraping mechanism, a sweeping mechanism, a blowing mechanism and a switching mechanism. The connecting box slides to drive the two scraper knives to shovel and scrape the bottom of the press and the upper surface of the workbench, so that condensed chippings are forcefully removed and scraped, automatic cleaning can be achieved, the working safety is guaranteed, the motor drives the connecting teeth to rotate so as to drive the rotating teeth to rotate, and through the meshing effect between the rotating teeth and the gear, the working efficiency is improved. The upper steel brush wheel and the lower steel brush wheel are driven to rotate reversely, the surface scraped by the scraper knife can be swept again, the cleaning effect is further improved, the two blowing mechanisms are driven to work through sliding of the motor, the cleaned part can be subjected to multiple times of blowing cleaning, and the cleaning effect is further improved.

The present invention belongs to the technical field of materials, and provides an anti-fingerprint agent, and a preparation method therefor and the use thereof. The anti-fingerprint agent is prepared from compounds such as trichlorotriazine, fluorine-containing aromatic diamine, methyl acrylate, and chloroalkyl siloxane and by means of reactions including substitution, addition, and polymerization. The anti-fingerprint agent has a hyperbranched three-dimensional structure, along with a C-F bond and a silane terminal group, and has excellent hydrophobic properties, anti-fouling properties, anti-fingerprint properties, abrasion-resistant properties, etc. Moreover, the anti-fingerprint agent does not contain per- or poly-fluoroalkyl substances (PFASs), which are restricted by the European Union, making it environmentally friendly. After coating, the initial water droplet angle on the surface of a substrate is 111° or above, and the water droplet angle still remains about 105° after rubbing with rubber and steel wool is performed 5000 times, such that the film has excellent anti-fingerprint and abrasion-resistant properties.

This utility model belongs to the field of wastewater treatment equipment, specifically relating to a high-gradient magnetic separation device, including a flocculation reaction tank, a magnetic field separation box, a sludge tank, and a clear water tank connected by pipes; the flocculation reaction tank is located above the magnetic field separation box, and the sludge tank and clear water tank are located below the magnetic field separation box; the magnetic field separation box is equipped with a stainless steel wool layer, and electromagnets are installed at the upper and lower ends of the magnetic field separation box, with rectifiers connected to the electromagnets; wastewater containing heavy metal ions is first mixed with the magnetic flocculation composite material in the flocculation reaction tank and stirred, and then flows into the magnetic field separation box under gravity. The rectifier applies a magnetic field to the upper and lower ends of the magnetic field separation box. Under the action of the magnetic field, the non-magnetic part is discharged into the clear water tank through the gaps in the stainless steel wool layer, while the magnetic part is captured in the stainless steel wool layer. After the magnetism is deactivated, the magnetic part enriched in the stainless steel wool layer flows into the sludge tank, thereby achieving the effect of sludge-water separation.

The utility model discloses a steel wire cotton ball liquid soap filling device which comprises a conveying belt, a filling channel, a liquid soap cylinder and steel wire cotton ball bodies, fixing seats are evenly arranged at the top of the conveying belt, the steel wire cotton ball bodies are placed in the fixing seats, the liquid soap cylinder is arranged on one side above the conveying belt, and the liquid soap cylinder is arranged on the other side above the conveying belt. A liquid soap barrel is arranged in the liquid soap barrel, a filling channel is arranged below the liquid soap barrel, a piston is arranged at the top end in the filling channel, an air cylinder is fixed to the bottom end of the liquid soap barrel, the output end of the air cylinder is connected with the piston through a telescopic rod, and a nozzle is arranged at the bottom end of the filling channel through a liquid outlet pipe. By installing the conveying belt, the fixing base, the steel wire cotton ball body, the soap liquid barrel, the filling channel, the air cylinder, the piston, the liquid guide pipe, the first electromagnetic valve, the liquid outlet pipe, the second electromagnetic valve and the nozzle, the filling amount can be adjusted according to the specification of the steel wire cotton ball body, and different soap liquid filling requirements are met.

Hollow porous spherical nano nickel powder with the surface coated with magnesium metal is adopted as a hydrogen adsorption material and is filled in a hydrogen storage tank, a steel wool filter layer covers the upper layer, a small number of through-hole magnetic sheets are placed in the filter layer, and the through-hole magnetic sheets and the steel wool form a magnetic filter layer together; nano nickel powder escaping in the hydrogen desorption process can be adsorbed and filtered; under the pressurization condition, hydrogen molecules on the inner surface of the hollow spherical nano nickel powder are closely stacked, similar to a quasi-liquid condition, so that the hydrogen storage capacity is greatly improved; a magnesium metal coating layer is arranged on the outer surface of the hollow porous spherical nano nickel powder, an MgH2 compound can be formed, hydrogen molecules are easily adsorbed on the surface of the magnesium metal coating layer, the overall hydrogen storage capacity can be improved, heating and cooling conditions are not needed, and convenience and practicability are achieved.

The utility model discloses a titanium alloy curled edge welding seam welding protection dragging cover which comprises a flexible buckle, a tightening screw, an air inlet rubber pipe, an air inlet connector, an upper shell, a side shell, a tail shell, an aluminum silicate cotton cushion, steel wool and an air outlet baffle. A flexible buckle is convenient to disassemble, a variable cross-section ventilation mode is adopted in the connecting position of an air inlet connector and an upper shell, protective gas can be evenly distributed to the periphery, a tail shell is provided with a through groove, it can be guaranteed that weld joints and heat affected zones on the two sides are located in an argon protective dragging cover, an aluminum silicate cotton pad is soft and resistant to high temperature, a welding gun is manually used during welding, resistance is avoided, air is effectively isolated, and the welding efficiency is improved. The steel wool can evenly divide protective gas into the whole dragging cover, and small ventilation holes are formed in the gas outlet baffle and used for isolating the steel wool from making contact with a hemming weld joint. The device is simple in structure and easy to manufacture, can quickly realize engineering application, and is matched with a conventional welding gun to solve the problem of material embrittlement in the titanium and titanium alloy welding process.

This utility model discloses a steel wire rotary dry wiping device, relating to the technical field of steel wire surface residue removal devices; it includes a frame, a wiping mechanism, and a collection mechanism; the wiping mechanism is connected to the top of the frame; the wiping mechanism includes steel wool, a rotating cage, an input shaft, and an output shaft; one end of the rotating cage is rotatably connected to one side of the frame via the input shaft, and the other end of the rotating cage is rotatably connected to the other side of the frame via the output shaft; the rotating cage is filled with multiple steel wool, the input shaft has a first opening corresponding to the rotating cage, and the output shaft has a second opening corresponding to the rotating cage; the steel wire enters the rotating cage through the first opening, and the steel wool in the rotating cage rubs the steel wire to remove dust from the surface of the steel wire, and the steel wire is output through the second opening; the collection mechanism is connected to the frame below the wiping mechanism; it is capable of collecting the dust that falls from the wiping mechanism.

The invention relates to the technical field of wear resistance detection, and discloses UV cover film wear resistance detection equipment which comprises a base, a bearing table is arranged on the base in a sliding mode, a UV cover film is arranged on the bearing table, a support is rotationally arranged on the base, steel wool is arranged at the tail end of the support, and a driving assembly is further installed on the base. In the detection process, automatic reciprocating sliding of the bearing table is achieved through the driving assembly, friction action does not need to be manually driven, the labor intensity of operators is greatly reduced, and meanwhile action errors caused by manual operation are avoided; after detection is completed, automatic separation operation can be completed through a linkage mechanism of an adjusting roller only by starting a stepping motor, a downward moving groove of the adjusting roller drives a synchronous frame to move downwards so that the steel wool can be preliminarily separated from the UV covering film, a follow-up protrusion and a strip-shaped groove are matched to drive an ejector rod deflection support to achieve large-amplitude lifting of the steel wool, and sufficient space is provided for disassembly and assembly. The whole separation process does not need manual intervention, and the continuity and efficiency of the detection process are remarkably improved.

The utility model provides a shearing device for steel wool production, which comprises a shearing device arranged on a bedplate, a coiling mechanism and a flattening mechanism are arranged on the left side and the right side of the shearing device, and the shearing device comprises a supporting plate, a portal frame arranged above the supporting plate, a pressing device arranged above the portal frame and a movable cutter arranged on one side of the portal frame. According to the shearing device for steel wool production, the shearing device is arranged between the rolling mechanism and the flattening mechanism, so that uneven places on the two sides of steel wool can be cut off, the two sides of the steel wool are flattened, the shearing device can replace workers to rapidly flatten the edges of the steel wool, and the working efficiency is improved.

The invention relates to the technical field of brake disc preparation, and particularly discloses a formula of a powder-pressed brake disc containing glass fibers and a preparation process of the powder-pressed brake disc containing the glass fibers. The invention relates to a high-strength steel wool composite material which comprises the following components in percentage by weight: 14-18% of steel wool, 4-6% of barite, 8-12% of artificial graphite, 4-6% of aluminum oxide, 10-15% of phenolic resin, 42-46% of foam iron powder, 0.5-1.5% of tire powder, 4-6% of magnesium oxide and 1-3% of fiber materials, wherein the fiber materials comprise glass fibers. The process comprises the following steps; weighing the pretreated raw materials, the non-pretreated raw materials and the glass fibers according to the formula; pretreatment: vacuum drying the pretreated raw materials, mixing the pretreated and non-pretreated raw materials for 45 minutes, adding glass fibers for 5 minutes, preheating a mold to 90 DEG C, 168 DEG C, pressing for 13 minutes under 23 MPa, stepwise heating to 180 DEG C, performing staged heat preservation, and slowly cooling under inert gas. The invention aims to solve the problems that a friction disc is made of asbestos and other materials, carcinogens are easily generated, the friction disc is not environment-friendly, and the high-temperature friction performance is low.

The present application relates to the technical field of vehicle exhaust treatment, and particularly relates to a steel wool welding method of an exhaust aftertreatment device, which comprises the following steps: S1, steel wool and sleeve spare parts are prepared and cleaned, solder paste is diluted with water to prepare solder; S2, the steel wool is soaked in the solder, so that the solder is coated on the surface of the steel wool; S3, the steel wool is taken out from the solder, and the steel wool is placed for shade drying; S4, the steel wool is preheated, and the water in the solder on the surface of the steel wool is dried; S5, the steel wool is loaded into the sleeve, and the steel wool is placed in a vacuum furnace, and the solder on the surface of the steel wool is heated and melted; S6, the steel wool is cooled, so that the solder on the surface of the steel wool is solidified, and the steel wool is welded with the inner wall of the sleeve. The present application can make the steel wool have a certain rigidity through a welding process, so that the deformation of the steel wool during installation or work does not cause uneven gaps and affect the reaction of the exhaust gas and urea.

The utility model discloses a titanium alloy annular radiator argon arc welding weld back gas blowing protection's device, including the protection cover, the steel wool and the gas guide pipe of setting in the protection cover inside and setting in the rectifier board of protection cover inside upper end, the protection cover is by the side plate and a bottom plate with hole composition, and the side plate end is provided with the grid tooth of curved radian, and the radian of grid tooth is determined according to the camber surface of annular radiator. The protection gas enters the gas guide pipe by the gas inlet of gas guide pipe bottom, and is discharged by the export pipe with the exhaust hole of top after the shunt pipe, and the protection gas is filled in the steel wool of protection cover after export pipe discharge and is disturbed, and the protection gas after disturbance discharges the air in the protection cover, and finally is discharged evenly through the rectifier board, thereby the back of argon arc welding weld is not oxidized. The side plate end has the grid tooth of bending, and the grid tooth can be bent according to the camber surface of annular radiator, thereby making the protection device adhere to the weld back that needs protection, making the protection sufficient.

A surface treatment agent that comprises a fluoropolyether-group-containing polymer represented by general formula (1), which has a hydroxylated silyl group or a hydrolyzable silyl group, and / or a product of partial (hydrolytic) condensation of the polymer. The surface treatment agent is capable of forming cured coating films which are excellent in terms of water and oil repellency and resistance to wear by steel wool and have a small water-sliding angle.Rf—[CH(V)2]α  Formula (1):(In the formula, Rf is a mono- or divalent residue of a polymer including a fluorooxyalkylene group, the V moieties each independently are a monovalent group having a hydroxylated silyl group or hydrolyzable silyl group at the end and having no polar group besides the hydroxylated silyl group or hydrolyzable silyl group, and α is 1 or 2.).