32results about How to "Improve waterproof" patented technology

The invention relates to a presswork production coating machine. The coating machine comprises a supporting stand, a material placing stand, a heating device, a flattening device (4) and a heat sealing device. The invention solves the difficulties that existing presswork production coating machines fail to realize even and smooth heating of a thin film in the process of thin film heating, gas between a presswork and the thin film cannot be successfully exhausted, so the presswork cannot be closely attached to the thin film, wrinkles and bubbles are therefore caused on the surface of the presswork and the coating effect is influenced. Meanwhile, the invention solves the difficulties that existing equipment fails to timely remove a hot melting block in the process of heat sealing of the thinfilm, so after long-hour operation of the hot melting block, a lot of melted thin films are adhered to the surface of the hot melting block, heat on the surface of the hot melting block cannot be transferred out, heat sealing is not tight, and the gloss, smoothness and aesthetic appearance of a coated film are affected.

The invention discloses a ceramic plate for a cooking bench, and a preparation and application method thereof. The ceramic plate is composed of a billet and a glaze, wherein both sides of the billet are provided with slots for splicing; and the billet is prepared from kaolin, phosphogypsum, epoxy resin toughening emulsion containing modified bamboo fiber, quartz, feldspar and lime. The application method comprises the following steps: in the cooking bench table top laying or cooking bench integral body construction process, inserting inserts into the slots of the ceramic plate, or coating a tile adhesive layer in the slots of the ceramic plate and inserting inserts into the slots, thereby implementing splicing of the ceramic plates. The ceramic plate has the advantages of favorable toughness, favorable water resistance, favorable wear resistance and favorable self-cleaning performance. The application method is simple, can effectively reduce and even avoid the use of the tile adhesive, can obviously accelerate the construction schedule, and is suitable for constructing the cooking bench table top and cooking bench integral body.

The invention discloses a waterproof rain cloth and a preparation method thereof, belonging to the technical field of waterproof materials. The waterproof rain cloth includes a base layer, which is a non-woven fabric layer, and also includes a waterproof coating arranged on the upper surface of the base layer, and an elastic waterproof layer arranged on the lower surface of the base layer, and the elastic waterproof layer and The base layers are connected by a bonding layer. Wherein, the waterproof coating is a graphene-modified polyurethane coating, the elastic waterproof layer is a titanium dioxide / natural rubber nanocomposite material layer, and the adhesive layer is a graphene-modified epoxy resin adhesive layer. The preparation method comprises: preparation of graphene-modified polyurethane paint; preparation of titanium dioxide / natural rubber nanocomposite material; preparation of graphene-modified epoxy resin binder; preparation of waterproof rain cloth. The waterproof rain cloth not only has a good waterproof effect, but also has high toughness and elasticity. The preparation method is simple in process, mild in conditions, and has good application prospects.

The invention discloses a construction connection structure for a building deformation joint. The construction connection structure comprises a concrete wall, the deformation joint, a bituminous waterproof sheet material layer, a waterproof elastic material connection band, L-shaped connectors, a stainless steel component A, connectors in the shape shown in the description, an elastic rubber band,a buried water-stop belt and a stainless steel component B, wherein the deformation joint is formed in the middle of the concrete wall, the bituminous waterproof sheet material layer is wrapped intothe portion, between concrete wall bodies, of the deformation joint, the stainless steel component A and the stainless steel component B are installed on the tops of the portions, on the two sides ofthe deformation joint, of the concrete wall, and the elastic rubber band, the buried water-stop belt and the waterproof elastic material connection band are sequentially arranged between the tops of the stainless steel components A and B from top to bottom. By means of the construction connection structure, the waterproof and anti-seep performance of the deformation joint are enhanced, the construction connection structure has sufficient expansion and contraction margins, pull crack breakage of the material is avoided or reduced, the construction connection structure is suitable for the building deformation joint which is large in joint width, and the problems are effectively solved that the deformation joint leaks, the waterproof sheet material is pulled apart, and the sheet material layer is damaged to lead to waterproof failure.

The invention discloses a PVC composite floor and a manufacturing method of the PVC composite floor, and belongs to the field of floor manufacturing. The PVC composite floor comprises a PVC surface layer and a composite base material which are glued and compounded through adhesive, the PVC surface layer is prepared from hard or soft PVC, and the base material is composed of a lining plate, a core layer and a bottom plate in a glued mode. The manufacturing method comprises the steps of preparation of the composite base material and preparation of the PVC composite floor. The preparation of the composite base material comprises the steps that 1, materials in different layers needed by the base material are dried to obtain the corresponding moisture content; 2, the lining plate, the core plate and the bottom plate are pressed; 3, maintenance is carried out; 4, the base material is repaired; 5, the two faces of the base material are sanded; 6, the base material is placed in a conditioning room for use. The preparation of the PVC composite floor comprises the steps that 11, the PVC surface plate and the composite base material are glued through the two-component polyurethane adhesive; 12, the bottom plate of a plain plate is sanded; 13, tenoning is carried out; 14, chamfering and paint sealing are carried out; 15, packaging is carried out. The advantages of a reinforced floor and a PVC floor are integrated, the PVC composite floor has the elastic foot feeling of solid wood, and waterproof and fireproof properties, friction resistance and acid and alkali resistance are improved.

The invention provides waterproofing slurry for building roofs and a preparation method thereof. The slurry comprises the following components: styrene-acrylic emulsion, modified organic silicon resin, epoxy resin, pentaerythritol triacrylate, chlorinated paraffin, kaolin, ground calcium carbonate, vermiculite power, graphene, attapulgite, barium sulfate, mica powder, a defoaming agent and a filler. The preparation method comprises: performing a modification reaction on the styrene-acrylic emulsion, the epoxy resin and the graphene first, and then mixing a product obtained after the reaction with the remaining components uniformly to obtain the slurry. The slurry provided by the invention is applied to roof construction, not only can improve waterproof and anti-crack properties of roofs but also has certain characteristics of corrosion resistance and aging resistance, and has a good application value.

The invention discloses a fluorine containing mixed material for a fluorine containing super oil repellent microporous membrane. The mixed material is characterized by comprising the following components in percentage by weight: 50 to 90% of component A, 3 to 25% of component B, 0 to 35% of component C, and 0 to 3% of component D, wherein the component A is high molecular weight polytetrafluoroethylene homopolymer or copolymer dispersion resin; the component B is fluorine containing alkyl acrylate monomers or mixed monomers; the component C is fluorine free acrylate or a mixture prepared by mixing more than two fluorine free acrylate; and the component D is a high temperature free radical initiator. The fluorine containing mixed material is a raw material and can be used to prepare a fluorine containing super oil repellent microporous membrane, which is waterproof, breathable, oil stain resistant, and water washing resistant and meets the requirements of novel waterproof and breathable protective clothing.

The invention discloses a front-end sealing structure based on a spindle. The structure comprises a rotor, a knife handle, a water jacket, a waterproof cover, a spacer ring assembly and a dustproof ring assembly; the knife handle is butted on one side of an axle center of the rotor; and a fixed block is inlaid at the edge of the knife handle and the rotor, and the fixed block is fixedly connectedwith the rotor through a screw, and the inner wall of the water jacket is connected with the outer wall of the rotor through a bearing connect in a sleeving manner. The front-end sealing structure based on the spindle is mainly composed of the water jacket, the dustproof ring assembly, an air ring and the waterproof cover, and can make air flow from an air sealing joint into an air sealing air path in the water jacket, and the air flow flows through the peripheral side of the air ring, and fills a gap, and then is discharged out of the spindle from the radial gap between the waterproof cover and the dustproof ring assembly, so that the dustproof effect of the spindle is greatly improved; and more preferably, when water splashes on the axial direction of the front-end of the spindle, the water hits the end face of the waterproof cover first so as to reduce the pressure of water vapor, and the air pressure of the radial gap can blow the splashed water to the periphery side of the gap, sothat the fact that the water vapor enters into the spindle is greatly avoided.

The invention discloses a cable fixing head, which comprises a cable fixing head and a nut at one end of the cable fixing head, the other end of the nut is screwed to a threaded sleeve body through a first O-shaped waterproof ring, and the other end of the threaded sleeve body is threaded through a second O The threaded connection of the type waterproof ring has a breakout head, and the nut, the first O-type waterproof ring, the main body of the threaded sleeve, the second O-type waterproof ring and the breakout head are connected in sequence from left to right, between the main body of the threaded sleeve and the breakout head The inner cavity is provided with an inner clamp, the inner clamp includes a lower sleeve, and a port of the lower sleeve is connected to the middle sleeve, and the upper end of the clamping claw is provided with a bevel chuck. The beneficial effects achieved by the present invention are: cable fastening Higher resistance, stronger tensile strength; improved waterproof, dustproof, acid and alkali resistance and other performances of the cable fixing head, and improved anti-magnetic and insulation effects at the cable connection; the cable fixing head is connected to the electrical equipment box at one port , It can also be threaded into the electrical equipment of the internal thread of the import and export text.

The invention discloses a micro-expansion waterproof mortar and a preparation method thereof. The micro-expansion waterproof mortar of the invention is composed of the following raw materials by weight: 75-95 parts of cement, 5-25 parts of fly ash, 250-400 parts of sand, 75-100 parts of water and 7-9 parts of an expansive fiber anti-cracking waterproof agent. The preparation method for the micro-expandable waterproof mortar of the invention comprises the following steps: weighing 75-95 parts of cement, 5-25 parts of fly ash and 250-400 parts of sand according to the weight percentage of the raw materials, carrying out uniform mixing under stirring, adding 75-100 parts of water, carrying out stirring until the formed mixture is viscous, finally adding 7-9 parts of the expansive fiber anti-cracking waterproof agent, and performing stirring and mixing. The micro-expandable waterproof mortar prepared by using the preparation method in the invention is greatly improved in waterproofing, anti-seepage and anti-cracking effects, meets engineering needs, and improves project quality.

The invention discloses a flame-retardant polyurethane hot melt adhesive with excellent water resistance and a preparation method of the hot melt adhesive. The hot melt adhesive is characterized by comprising the following components: 5-25 parts of a polyether diol, 1-35 parts of a liquid polyester diol, 1-40 parts of a flame-retardant polyether polyol, 1-50 parts of a crystalline polyester diol,5-40 parts of a hydroxyl-terminated phosphorus-containing flame-retardant polyacrylic acid fluorine-containing copolymer, 10-50 parts of isocyanate, 0.1-2 parts of a catalyst, 0.2-3 parts of an antioxidant and 0.1-4 parts of a silane coupling agent. According to the method provided by the invention, hydroxyl-terminated poly(trifluoroethyl acrylate-random-methyl methacrylate-random-methoxyethyl methacrylate-random-2-methyl-2-acrylic acid-2-hydroxyethyl ester phosphate) is firstly synthesized, the hydroxyl-terminated poly(trifluoroethyl acrylate-random-methyl methacrylate-random-methoxyethyl methacrylate-random-2-methyl-2-acrylic acid-2-hydroxyethyl ester phosphate) is added into a polyurethane prepolymer, a fluorine-containing acrylate copolymer chain segment and a reactive flame retardantare introduced, and therefore the water resistance, chemical resistance and flame retardancy of the polyurethane colloid are further improved.

The invention relates to a construction method for a bearing overlapped heat-insulating floor slab. The construction method comprises the following steps: (1) preparation of a heat-insulating board: preparing heat-insulating mortar by mixing cement and aggregates, and then pouring in a mold, thereby forming the heat-insulating board, wherein the heat-insulating board at least comprises a heat-insulating layer; the heat-insulating layer is prepared from cement and aggregates; the aggregates include forestry and agricultural residues and / or lightweight aggregates; (2) hoisting of the heat-insulating board; (3) cast-in-place of overlapped layer: directly taking the heat-insulating board as a template, pouring concrete, permeating cement slurry into the heat-insulating board, solidifying withthe aggregates in the heat-insulating board, forming a heat-insulating solidified bonding layer in the heat-insulating layer of the heat-insulating board, and integrally connecting the heat-insulatingboard with a cast-in-place bearing floor by the heat-insulating solidified bonding layer, thereby forming an interface-free bearing overlapped heat-insulating floor slab. The heat-insulating floor slab has high structural integrity, is free from interface, is high in stretching bonding strength and is different from the traditional overlapped floor slab structure. The heat-insulating board is directly used as the template, so that the heat-insulating effect of the floor slab is promoted and the construction efficiency is increased.

The invention discloses a scrubbing-resistant high-adhesion metal flashing coating for a photo frame. The scrubbing-resistant high-adhesion metal flashing coating is prepared from 35-45 parts by weight of hydroxy acrylic resin, 5-15 parts by weight of aqueous polyester resin, 2-6 parts by weight of ternary vinyl chloride-vinyl acetate resin, 3-6 parts by weight of amino resin, 1-4 parts by weight of dimethyl ethanolamine, 3-9 parts by weight of aqueous polyurethane, 2-6 parts by weight of a polyurethane dispersant, 1-4 parts by weight of ethylene glycol monobutyl ether, 2-8 parts by weight of modified cellulose acetate butyrate, 3-9 parts by weight of aluminum powder, 1-4 parts by weight of antimony oxide, 3-9 parts by weight of titanium dioxide, 4-9 parts by weight of ultrafine heavy calcium carbonate, 2-5 parts by weight of ultrafine kaolin, 1-4 parts by weight of micro-plastic-crystal grains, 3-6 parts by weight of a curing agent, 1-4 parts by weight of a levelling agent, 2-5 parts by weight of a wetting agent, 1-5 parts by weight of an antifoaming agent and 2-6 parts by weight of a thickening agent. The metal flashing coating has excellent scrubbing resistance and high adhesion performances.

The invention discloses a production method of a nanometer titanium dioxide-based superhydrophobic composite corrugated carton. According to the production method, firstly, a multi-layer film is constructed on the surface of kraft pulp fiber with a layer-by-layer self-assembly method by using chitosan and modified nanometer titanium dioxide respectively; as the number of layers increases, chitosan / nanometer titanium dioxide powder is also increased on the surface of the kraft fiber, and paper fiber is gradually covered by the modified titanium dioxide; due to the modification, the paper fiberis endowed with good hydrophobicity, and an contact angle with water is gradually increased; kraft paper with a superhydrophobic surface can be obtained by a conventional papermaking technology and high-temperature heat treatment; the kraft paper and ultrathin calendered kraft paper are bonded by using molten polyethylene, not only is a bonding effect achieved, two layers of the kraft paper are combined, and more importantly, a bonding agent forms a film, so that the waterproof, moisture-proof and barrier properties, the puncture strength, the burst strength and the like of composite surface paper are further improved.

The invention belongs to the technical field of high-voltage isolating switches and discloses an outdoor 10-kilovolt line high-voltage isolating switch. The switch comprises supporting legs; a supporting base is fixedly connected to the upper portions of the supporting legs; and a first insulating supporting rod is fixedly connected to one side of the upper portion of the supporting base. According to the outdoor 10-kilovolt line high-voltage isolation switch, a second insulation supporting plate is installed on the upper portion of a device knife switch connecting plate; an upper protection shell is installed on the upper portion of the second insulation supporting plate in the using process; the upper protection shell inclines towards two sides by an angle of 30 degrees; when rainwater intrudes the outdoor 10-kilovolt line high-voltage isolation switch, the rainwater can be blocked through the upper protection shell; the upper protection shell inclines by an angle of 30 degrees at the same time, so that the rainwater is conveniently driven to be guided to the two sides; therefore, waterproof and sun-proof effects of the device in use can be improved, the phenomenon that the device erodes between a knife switch and a knife switch wiring board in use is reduced, and the service life of the device in use is prolonged.

The invention discloses a control cable for an anti-radiation ship. The control cable comprises a cable core; the cable core comprises a framework; the framework comprises a main framework with a regular triangular cross section and three auxiliary frameworks with regular triangular cross sections; grooves are formed in the middle parts of the three surfaces of the main framework in the axial direction respectively, and one auxiliary framework is arranged in each groove; the two tangent planes of each groove are clamped on the center lines of the two surfaces of the corresponding auxiliary framework respectively; the main framework and the three auxiliary frameworks are of an integrated structure; a control wire core is arranged in each of the three corners of the main framework and the three auxiliary frameworks separately; and the outer side of the cable core is sequentially coated with a cross-linked polyolefin inner sheath, a tinned copper strip braided main shielding layer and a cross-linked polyolefin outer sheath from inside to outside. The control cable is provided with the framework, wherein the framework comprises the main framework with the regular triangular cross section and the three auxiliary frameworks with regular triangular cross sections; and by virtue of the stability of the triangle, a high protection effect is achieved on the control wire core; and meanwhile, the anti-compression and tensile properties of the cable can be improved.

The invention relates to a special fireproofing optical cable for metro, which comprises four optical fibers with different colors. A stainless steel pipe is arranged outside the optical fibers; a filling fiber paste is filled in the stainless steel pipe; a low-smoke halogen-free internal sheath is coated outside the stainless steel pipe; a waterproof unit is extruded and molded outside the low-smoke halogen-free internal sheath; an armoring tape is coated outside the waterproof unit; and a low-smoke halogen-free external sheath is arranged outside the armoring tape. The cable has the advantages that the special fireproofing optical cable for metro adopts the stainless steel pipe optical fiber unit, which can effectively improve waterproof, fireproof and ratproof functions, further improves safety and service life of the cable; when designing the cable, in view of convenience and environment protection of the cable construction, a semidry construction structure is adopted; the cable is easy to peel off for construction and optical fiber continuing and so on; the steel pipe optical fiber unit can bear 800 DEG C., and the normal communication side is not influenced.

The invention relates to the technical field of asphalt pavement maintenance, in particular to a milling-free in-situ cold recycled asphalt pavement maintenance method. The method comprises the following steps of selecting an asphalt reduction regenerant prepared by refining naphthenic crude oil, and uniformly mixing and stirring the asphalt reduction regenerant with water in proportion, pouring the uniformly stirred asphalt reduction regenerant into a special spraying vehicle storage tank, after the special spraying vehicle enters the field, starting a stirrer in a storage tank of the specialspraying vehicle, and continuously stirring for 30 minutes, turning off a stirrer power supply, setting a spraying width according to the width of a construction pavement, selecting a construction advancing direction, and adjusting the position of the special spraying vehicle, according to the determined spraying amount and spraying width of the asphalt reduction regenerant, determining the operation speed per hour of the special spraying vehicle, the ground clearance of a spraying pipe, the spraying pressure, the spraying flow angle and the overlapping width of adjacent spraying belts, carrying out trial spraying on the asphalt pavement for a certain length, so that the asphalt reduction regenerant after trial spraying is uniformly distributed on the pavement, and after trial spraying iscompleted and no error is confirmed, conducting formal spraying construction.

The invention discloses a DC brushless motor for a clutch. The DC brushless motor comprises a stator assembly (1), a rotor assembly (2), an end cover assembly (3), a sensor assembly (4) and a sensor protection cover (5); the DC brushless motor is characterized in that the end cover assembly (3) is fixed at the right end of the stator assembly (1); the sensor protection cover (5) is fixed at the right end of the end cover assembly (3); a bearing (22) is arranged at the left end of the rotor assembly (2); the left end of the rotor assembly (2) is connected to the stator assembly (1) through the bearing (22); an another bearing (22) is also arranged at the right end of the rotor assembly (2) and the right end of the rotor assembly (2) is connected to the end cover assembly (3) through the bearing (22); the sensor assembly (4) is also fixedly arranged on the end cover assembly (3). The DC brushless motor has the advantages of being wide in applicable working condition, long in service life, low in energy consumption and low in noise.

The invention discloses a visible light sensing key for achieving micro-power consumption through a single infrared receiving tube and an optical communicating and receiving dual-function implementation method. The micro-power consumption visible light sensing key and the optical communicating and receiving method are characterized in that the key can be pressed and released by detecting the strength of light, and meanwhile the optical communicating and receiving functions are achieved through the single infrared receiving tube; micro-power consumption is realized by being matched with corresponding hardware and MCU (microprocessor MCU) software processing. By the adoption of the method, the micro-power consumption visible light sensing key has the advantages of being low in power consumption, low in cost and suitable for water meters, heat meters and the like needing to be processed in a full-sealed mode to replace an optical interface or a key.

The invention discloses a polyurethane AB encapsulating material and a production process thereof. The production process comprises the following steps: (1) selecting materials: respectively preparing a polyurethane A material and a polyurethane B material according to a ratio of 35.5: 100; (2) preparation: checking a device to be encapsulated, wherein a product needs to be kept dry and clean; and (3) preheating: setting proper temperature and duration of the drying oven, and then placing the device needing to be encapsulated in the drying oven for pre-drying work. According to the polyurethane AB potting material and the production process thereof, the mixture obtained by mixing polyurethane AB is used for potting, so that the integrity of an electronic device is enhanced, the resistance to external impact and vibration is improved, and the positive effect is achieved in the aspect of improving the insulation between internal elements and circuits, so that the miniaturization and the light weight of the device are facilitated, and the production cost is reduced. The direct exposure of elements and circuits is avoided, the waterproof and moisture-proof performance of the device is improved, and the use performance and stable parameters are further improved.

The invention discloses a remote controller provided with a photo-frame-shaped solar cell. The remote controller comprises a remote controller shell provided with a button area and a display screen, the display screen is embedded in the remote controller shell, a circuit board and a battery are arranged in the remote controller shell, the remote controller shell is also provided with a solar cell panel, the solar cell panel is photo-frame-shaped used for charging the cell, and the photo-frame-shaped solar cell panel covers the surface of the display screen. According to the remote controller, the photo-frame-shaped solar cell panel covers the surface of the display screen, the remote controller shell is only provided with an embedded hole, the sealing performance of the remote controller shell is not influenced, the original shape of the remote controller is not fundamentally changed, and the waterproof and dustproof effect of the display screen can be further improved.

The invention discloses a recycling method of water-soluble industrial waste. The recycling method comprises the following steps of firstly, pumping moisture and air in wood to obtain a product A, then filling a wall cavity of the product A with the water-soluble waste to obtain a product B, and then drying the product B to make the water-soluble waste in the product B completely cured after drying to obtain a finished product of wood. The recycling method can effectively utilize the water-soluble waste generated during wood product processing and has the advantages that the treatment difficulty is low, the treatment cost is low, and the environmental protection effect is good.

The invention discloses a composite cable for an electric automobile. The composite cable comprises a cable core, wherein the cable core comprises frameworks, and the number of the frameworks is two and the frameworks have regular triangle cross sections, wherein one regular triangle framework is rotated by 180 degrees to be stacked with the other regular triangle framework up and down to form a main framework with a rhombic cross section and four auxiliary frameworks with triangular cross sections; a control wire core is arranged in the main framework, and a power wire core is arranged in each auxiliary framework; and a mica tape wrapping layer, an ethylene propylene rubber inner sheath layer, a steel wire braided general shielding layer and an ethylene propylene rubber outer sheath layerare sequentially wrapped outside the cable core from inside to outside. According to the cable, the frameworks are arranged, and the number of the frameworks is two and the frameworks have regular triangle cross sections, wherein one regular triangle framework is rotated by 180 degrees to be stacked with the other regular triangle framework up and down to form a main framework with a rhombic cross section and four auxiliary frameworks with triangular cross sections; by virtue of stability of the triangle, a high protection effect is achieved on the wire core; and meanwhile, the anti-compression and tensile properties of the cable can be improved.

The invention relates to the technical field of mobile terminals, and particularly relates to a self-sealing mobile phone protective shell meeting water for solving the problem that the mobile phoneshave no long-term waterproofing and soaking ability in the prior art. In the self-sealing mobile phone protective shell meeting water provided by the invention, a self-sealing mechanism is arranged atthe protective shell opening of such electronic devices as a mobile phone, by means of a self-sealing element, a movable connecting part and a sealing rubber ring in the self-sealing mechanism, aftera water meeting expansion part expands after meeting water, a connecting surface of the self-sealing element can be extruded, so that the self-sealing element rotates toward the direction of the mobile phone opening to press the protective shell vi the sealing rubber ring so as to seal the opening, thereby avoiding the opening being soaked by more water or avoiding a long-term water soaking condition of the opening, effectively improving the waterproofing and water soaking resistance, and improving the protection performance of the protective shell.

The invention discloses a prefabricated wall preformed hole self-sealing waterproof jacket and an implementation method and mainly relates to the technical field of architectural engineering installation. The prefabricated wall preformed hole self-sealing waterproof jacket comprises a wall. A preformed hole is formed in the wall, a pipeline is arranged in the preformed hole, and a flexible charging self-sealing bag is arranged on the pipeline. A strip hook-and-loop fastener is arranged on the charging self-sealing bag, protrusions are arranged on the surface, close to the pipeline, of the charging self-sealing bag, a thread seal nozzle is arranged at one end of the charging self-sealing bag, a liquid outlet is formed in the end, away from the seal nozzle, of the charging self-sealing bag, separable ferrules are arranged on the seal nozzle, and threaded holes matched with the seal nozzle are formed in the ferrules. The prefabricated wall preformed hole self-sealing waterproof jacket and the implementation method have the advantages that the interval between the inner wall of the preformed hole and the pipeline can be effectively sealed, so that the waterproof and damp-proof purposes are achieved, the sealing durability is improved, and later maintenance cost is reduced; construction cost is low, installation is convenient and quick, detachment is convenient, the pipeline cannot be damaged, enlargement is convenient, and high adaptability is achieved.

The invention relates to a leather material, in particular to a leather material with wear-resistant and self-cleaning functions and application thereof. The leather material with the wear-resistant and self-cleaning functions is obtained by spraying, roll coating, brush coating or wipe coating a curable composition, wherein the curable composition comprises a component A and a component B; the component A is prepared from the following raw materials in parts by weight: 65-80 parts of polyaspartic acid ester resin, 4-8 parts of a silicon-fluorine copolymer, 1.5-1.8 parts of extinction particles, 15-20 parts of a solvent, 7-10 parts of a graphene compound and 1.2-5 parts of an auxiliary agent; the auxiliary agent comprises at least one of an antifoaming agent, a coalescing agent, a levelingagent and a wetting agent; and the component B is isocyanate. The curable composition disclosed by the invention can be well attached to leather, so that the leather has the excellent wear-resistantand self-cleaning functions, and the leather with the wear-resistant and self-cleaning functions can be applied to the fields of leather for living clothes, leather for furnishing and decoration, leather for furniture, leather for industrial manufacturing and leather for military industry.

The invention relates to a direct current brushless motor which is provided with a brake and used for clutch. The direct current brushless motor is characterized in that a front end cover assembly (2) is fixed at the left end of a stator assembly (3), an end cover assembly (5) is fixed at the right end of the stator assembly (3), a sensor assembly (6) is mounted on the end cover assembly (5), a sensor protective cover (7) is fixed on the end cover assembly (5) and used for covering the sensor assembly (6); the left end of the rotor assembly (4) is connected with a bearing (9) on the front end cover assembly (2), and the right end of the rotor assembly (4) is connected with a bearing (9) on the end cover assembly (5) and is limited by a clamping spring II (10) arranged on the rotor assembly (4); and an electromagnetic brake (1) is fixed on the front end cover assembly (2), and a positioning block (11) in fit with the electromagnetic brake (1) is arranged on the rotor assembly (4). The direct current brushless motor provided by the invention has the advantages that a mechanism is locked when the motor does not work and stable rotational position of the motor is guaranteed.

The invention discloses an integrated structure of an antenna and a communication equipment shell, which is characterized by comprising a first shell part and a second shell part. The first shell partcomprises an antenna radiator. The antenna radiator has electronic conductivity. The antenna radiator is a part or all of the area of the first shell part. When the antenna radiator is a partial areaof the first shell part, the first shell part further comprises an insulating shell, the insulating shell is an area, with electronic insulativity, of the first shell part, the second shell part andthe insulating shell are integrally formed or fixedly connected so as to achieve airtight combination, and the antenna radiator is fixed to the insulating shell. When the antenna radiator is the wholearea of the first shell part, the second shell part is fixedly connected with the first shell part, a transition layer is arranged at the joint of the second shell part and the first shell part so asto achieve airtight combination, and the transition layer is of a single-layer or multi-layer structure. The invention has the technical characteristics of attractive and flexible design, integration, lightness and thinness.