128results about How to "Achieve impact resistance" patented technology

The invention relates to a metal surface modification method. The invention first obtains a textured surface with a certain surface roughness value on the surface of a material by an electron beam texturing method, forms uniform tiny pits, and increases the bonding strength of the interface; then uses plasma The spraying process uses Co-based alloy or Ni-based alloy powder as the material to form a coating; finally, laser remelting technology is used to remelt the coating surface to improve the surface structure of the coating and improve the surface performance. Compared with the existing technology, this process can realize high temperature resistance, corrosion resistance, oxidation resistance, and fatigue resistance, and has high bonding strength, and the coating structure is uniform and compact, thereby greatly broadening the application range.

Disclosed are a silicon carbide particle reinforcement aluminum-based composite for a train brake disc and a preparation method. The composite includes the following components of, by mass percentage, 15-25% of SiC particles, 18-24% of Si, 0.6-3.5% of Mg, 0.15-0.35% of Zr, 0.12-0.45% of Sc, and the balance Al and unavoidable impurities. According to the preparation method, SiC, Mg, Si, Zr and Sc with the particle size being 10-15 [mu]m are added into molten aluminum in the form of intermediate alloy, SiC with the particle size being 15-25 [mu]m is added into the molten aluminum in the form of particles, and thus the silicon carbide particle reinforcement aluminum-based composite is obtained. The SiC thin particles are added in the form of Mg-SiC, so that the problems of uniform dispersing difficulty of silicon carbide particles in a matrix and poor interface bonding are effectively solved, the particle reinforcement effect is fully played, and the toughness of alloy is improved. Meanwhile, transitional element zirconium and rare earth element scandium are added to replace titanium fine grains, the roughness and heat resistance of the aluminum-based composite are remarkably improved, and occurrence of heat fatigue cracks is restrained. In addition, the added rare earth scandium has a good modification effect on the interfacial compatibility of the silicon carbide particles and aluminum alloy.

The invention discloses water-based coating containing a graphene / zinc-aluminum hydrotalcite nano composition and a preparation method thereof. The water-based coating is prepared from the following components in parts by weight: 30 to 50 parts of water-based resin, 25 to 40 parts of water, 0.1 to 0.5 part of dispersing agent, 0.1 to 0.5 part of wetting agent, 0.1 to 0.5 part of defoaming agent, 0.1 to 0.5 part of thickening agent, 0.1 to 0.5 part of film forming aids, 0 to 10 parts of curing agent, 0 to 25 parts of titanium dioxide, 0 to 20 parts of calcium carbonate, and 0.1 to 2.5 parts of graphene / zinc-aluminum hydrotalcite nano composition. The graphene / zinc-aluminum hydrotalcite nano composition is added into the water-based coating, so that the high temperature resistance, the corrosion resistance, the flame retardant property, the weather resistance, the impact resistance, the abrasion resistance, the hardness and the obstruction property of the water-based coating are significantly improved, and the multiple functions of the water-based coating are improved.

The three-dimensional hollow double sandwiched fabric consists of one upper layer interwoven with two upper ground warp layers and one upper weft yarn layer, and one lower layer interwoven with two lower ground warp layers and one lower weft yarn layer, as well as one middle layer interwoven with two middle ground warp layers and one middle weft yarn layer. The weft yarn layers in the upper layer, the middle layer and the lower layer are also interwoven with the poil warps, so that the upper layer, the middle layer and the lower layer are connected integrally to form one hollow double sandwiched structure. The fabric of the present invention is uses as reinforcing body of composite material, and the composite material with the fabric is light, high in impact strength, high in antiwear performance, high in bending performance and high in rigidity. The double sandwiched structure may be also used in heat insulation, anticorrosion, real-time monitoring, etc.

The invention belongs to the field of processing woods, and particularly relates to a method for manufacturing a bamboo strengthened poplar laminated veneer lumber. The manufacturing method comprises the following steps of: cutting the poplar veneer, scarfing the veneer, dipping the scarfed veneer, dipping a bamboo layer, drying, hot pressing, decorating a laminated timber and the like. The method is reasonable in design and simple in technology; the poplar with small diameter class is used as raw material for producing the laminated veneer lumber; the bamboo material with the same direction with fiber and high strength is introduced; the surface veneer is subjected to aqueous SiO2 (silicon dioxide) sol impregnation strengthened treatment, so that the shortcomings of the quality and the processing of the poplar are conquered, the existing resource is effectively used; the small woods and inferior woods can be better used; the outturn percentage is high; and the economic effect is obvious. The obtained laminated timber is high in strength, excellent in stability, free of cracking and deforming, high-temperature resistant and excellent in flame retardation. The obtained laminated timber can be used for indoor floorboard and decorating and refurbishing materials; the formaldehyde emission is far less than the home and aboard emission standard; and environment-friendly requirements can be achieved.

The invention discloses a large-deformation constant-resistance periodic yielding bolt. The large-deformation constant-resistance periodic yielding bolt comprises a yielding bolt body, a sleeve, an elastic shell, an annular lockset, a wedge, a rubber pad, a backing plate and a nut, wherein the yielding bolt comprises an ordinary yielding bolt body section, a corrugated surface bolt body section; a rectangular wedge groove is formed in the end of the corrugated surface bolt body section; the sleeve comprises a hollow sleeve section and a solid section; symmetric slots are formed on the left and right sides of the hollow sleeve section; external threads are formed on the external surface at the end of the solid section; the hollow sleeve section sleeves the corrugated surface bolt body section of the yielding bolt; the annular elastic shell sleeves the external side of the hollow sleeve section; the annular lockset is arranged on the annular elastic shell; the rubber pad is arranged between the solid section of the sleeve and the backing plate, and moreover, the backing plate is fixedly arranged at the end of the solid section of the sleeve by the nut. When being impacted, the large-deformation constant-resistance periodic yielding bolt is capable of instantly realizing large deformation without damaging the whole structure of the yielding bolt, so that the yielding bolt has a bearing capacity and effect of resisting against impact can be realized.

The invention relates to an urban shock-resisting waterlogging-preventing rainfall flood management system, which comprises a plurality of blocks of concave green fields, a plurality of rainwater utilizing facilities, a plurality of concave rainwater parks, a plurality of concave playgrounds and an intelligent control system, and the urban shock-resisting waterlogging-preventing rainfall flood management system is characterized in that the concave green fields, the rainwater utilizing facilities, the concave rainwater parks and the concave playgrounds are communicated with one another though a water drain pipe network, the water drain pipe network is provided with a water drain pipe network liquid level meter, each concave rainwater park is internally provided with a park inner liquid level meter, each concave playground is provided with a playground inner liquid level meter, a water inlet of each concave rainwater park is provided with a park water inlet liquid level meter, a water inlet of each concave playground is provided with a play ground water inlet liquid level meter, the input end of the intelligent control system is connected with the output ends of the liquid level meters, and the output end of the intelligent control system is connected with control input ends of a water inlet / water discharging systems of the concave rain water parks and the concave playgrounds, thus an intelligent urban shock-resisting waterlogging-preventing rainfall flood management system is formed. The urban shock-resisting waterlogging-preventing rainfall flood management system has the beneficial effects that the shock can be resisted, the water logging is prevented, and the rain water is regulated, stored and discharged.

The invention discloses an impact-resistant building aluminum formwork, comprising a U-shaped plate, and a movable plate is arranged on the top side of the U-shaped plate; a moving groove is formed inthe bottom side of the moving plate; a fixed column is fixedly installed on the top side of the U-shaped plate, the top end of the fixed column extends into the moving groove, two cavities symmetrically formed based on the moving plate are formed in the U-shaped plate, moving holes are formed in the inner wall of one side, close to the U-shaped plate, of each cavity, moving rods are movably installed in the moving holes, and two ends of each moving rod extend out of the corresponding moving hole. The method is simple to operate, the moving plate is pressed by four extrusion plates to preventthe working plate from vibrating. Through the arrangement of a third spring, the working plate has the damping function, the working plate has the characteristic of impact resistance when working. When the working face of the working plate is abraded, the working plate can be disassembled by pressing two push rods, a new working plate can be aligned with a connecting plate to be pressed, thus installation can be completed, and the use requirements of people are met.

The invention provides a ceramic-metal composite liner plate for a large semi-autogenous mill and a casting method of the ceramic-metal composite liner plate. The liner plate is formed by arranging a ceramic composite layer on a metal matrix. A trace amount of molybdenum powder and a trace amount of nickel powder are added to the ceramic composite layer to improve the toughness of the ceramic composite layer, a trace amount of La2O3 powder is added to refine crystal particles of the ceramic composite layer, and the bonding strength of the ceramic composite layer and the metal matrix is improved. The casting method includes the casting technology process and the thermal treatment technology process. In the casting technology process, the ceramic composite layer and the metal matrix are metallurgically bound through negative pressure casting of an evanescent mode, and after pouring is completed, a casting is cooled by maintaining the vacuum degree of a sand box and horizontal two-dimensional vibration of a workbench of the sand box. The wave trough thickness of the manufactured ceramic-metal composite liner plate for the large semi-autogenous mill is larger than 140 mm, and the weight is 1.5 tons or above; the hardness of the ceramic composite layer is HBW600 or above, and the hardness of the metal matrix is larger than HRC40; the impact toughness is larger than or equal to 40 J / cm<2>, and the yield strength is larger than 1,100 MPa; and the beneficial effects of being resistant to shock, flowing deformation and abrasion are achieved.

A system for monitoring the life cycle of a product even in open-loop retail environment having regard to the associated supply or value chain, comprising tag provision equipment arranged to obtain product information and to configure a wirelessly interrogatable electronic identification tag provided with externally readable identification information to a product item, wherein configuring incorporates at least partially automated determination, according to predefined decision logic, of at least one technical characteristic of tag implementation based on the product information to optimize the operation of the tag, and electronic data management system accessible via a communications network, preferably the Internet, comprising a data interface configured to receive and transmit data, anda data repository configured to store indications of received digital notifications of tag reading events in a plurality of activities of the associated supply or value chain, the notifications conveying the tag identification information. A corresponding method for execution by the system is presented.

The invention provides an anchor cable supporting system with impact resistance. According to the technical scheme, an anchor cable penetrates through a pressure yielding tray, and a sunk part achieving the pressure yielding effect is arranged at the penetrating portion; meanwhile, a pressure yielding protective hood is arranged on the bottom face of the sunk part, a pressure yielding pipe is arranged in the sunk part, and a lock achieving the limiting effect is arranged at the bottom of the pressure yielding pipe; an annular object achieving an anti-fall protection effect is arranged below the lock and is hung at one end of the anti-fall hook, the other end of the anti-fall hook is hung on a rock body, and thus the anchor cable, the pressure yielding pipe, the lock and the like are all borne and protected by an anti-fall ring. Through the technological improvement, the anti-impact effect of the anchor cable in the vertical direction is achieved, and meanwhile, the anchor cable supporting system has an anti-fall protection function.

The invention provides a connector constructed 1 made of a steel pipe and bearing a tie function of a ladder-type sleeper for railway tracks, in a connector constructed of a steel pipe 1 used in the ladder-type sleeper for railway tracks integrated with longitudinal beams made of concrete and the connectors constructed of steel pipes 1 by feeding concrete, both end portions of the connector constructed of the steel pipe 1 are flattened in the horizontal direction and a corrosion resistant coating 4 is coated at portions of the connector constructed of the steel pipe 1 exposed to the atmosphere.

The invention relates to a power station generating set oil groove signal extension apparatus which comprises a pedestal and a panel. The pedestal and the panel are in sealed connection to form internal space. A central section of the pedestal extends a conduit which communicates with the internal space. An end of the conduit is in threaded connection with a first cable jacket. The panel is provided with a plurality of second cable jackets. A plurality of signal cables fixed by the first cable jacket go through the conduit and the internal space, and go out from the second cable jackets. The signal lead out apparatus of the present invention has the advantages of novel design, vibration proof, impact resistance, high grade of sealing pressure, high reliability, reduction of interference to an oil groove sensor signal by electromagnetic field, reduction of site construction difficulty, improvement of site construction efficiency and cost saving. Thereby, the signal extension apparatus of the present invention is especially suitable for extension of a power station generating set large bearing oil groove sensor signal.

The invention provides a lamp testing device, a lamp testing framework and a lamp testing method. The testing framework comprises a frame body and a mounting support, wherein the frame body is a cuboid and has an accommodation chamber for holding lamps to be tested, and reinforced ribs are disposed between diagonal vertexes of at least one side surface of the frame body; the mounting support is arranged between two parallel edges of one side surface of the frame body, and is used for fixing and connecting the lamps to be tested. The arrangement of the mounting support enables impact energy to be transferred to the support of the lamp and to the lamp, so as to test impact resistance capability for the support of the lamp and for the lamp. Special structural designs of the lamp impact-testing frame, such as reinforced ribs, reinforced plates, wrap angle reinforced elements, and the like, can reduce material consumptions under the condition of assuring impact strength, thereby reducing production cost.

The invention provides a miniature positioning navigation time service terminal. The miniature positioning navigation time service terminal includes an MEMS gyroscope, an MEMS accelerometer, a microprocessor, a micro atomic clock, a GNSS navigation chip and other main functional components; the method of integrated design is adopted, and the high integration and miniaturization of the positioningnavigation time service terminal are achieved. In order to achieve the orthogonal installation of the triaxial MEMS gyroscope and the triaxial accelerometer and the high integration of the terminal and improve the vibration resistance of terminal equipment, a rigid-flex board technology is used for conducting the three-dimensional package of the terminal. The miniature positioning navigation timeservice terminal does not rely on external information, has high independence, and can ensure that a user can obtain reliable positioning navigation time information under the condition of GNSS denial. The positioning navigation time service terminal has the advantages of a small size, low power consumption, high precision, a good real-time performance, strong impact resistance and the like.

The invention discloses a anti-impact vibration reduction structure and a vibration reduction system for a micro-inertia measurement unit, and the structure and system are used for reducing vibrationof a micro-inertia module supported by a supporting frame. The vibration reduction structure comprises a vibration isolator arranged on the supporting frame. The supporting frame is of a hexahedron frame structure, and vibration isolators are arranged at the eight vertex angles of the hexahedron frame structure. Each vibration isolator includes a pair of silicone rubber shock pads which are formedby dividing a dividing surface and are matched with each other. Vibration reduction and impact resistance of the micro-inertia module are achieved in an internal and external combined mode, multipletimes of attenuation of vibration can be achieved, the vibration effect is good, assembling is easy, and the micro-inertia module is suitable for vibration reduction under the condition that the installation space environment is limited.

The invention discloses an arch type flexible ecological revetment structure for a small and medium-sized valley or river channel and a construction method for the arch type flexible ecological revetment structure. The arch type flexible ecological revetment structure is characterized in that gabion retaining walls are built on valley or river channel bank slopes along the longitudinal direction; the bottoms of the gabion retaining walls are supported by an inverted stone arch built in the valley or river channel; the upper ends of the gabion retaining walls are tied at anchoring points of the bank slopes above the gabion retaining walls by tightening corrosion-resisting metal ropes. The construction method for the arch type flexible ecological revetment structure comprises the following steps of laying a metal mesh and loading stones on a substrate of each valley or river channel bank slope; vibrating, compacting and packaging the stones to form gabion units; sewing and tying adjacent gabions by using the corrosion-resisting metal ropes and building to the design elevation according to the mode; tightening and tying the gabions to the anchoring points of the bank slopes above the gabions by the corrosion-resisting metal ropes; meanwhile, building the inverted stone arch for supporting the bottoms of the gabion retaining walls in the valley or river channel. The arch type flexible ecological revetment structure and the construction method thereof disclosed by the invention have the advantages of reasonable mechanical design, simple construction process, easiness in construction and low construction cost; frequent landslides of the valley or river channel are prevented, disasters caused by the landslides are reduced, and ecological revetment is realized.

The invention provides a method for manufacturing a wear-resistant metal piece. A body of the wear-resistant piece is manufactured according to the conventional process, and, in a work area of the body of the wear-resistant piece, the following process steps are performed: manufacturing blind holes which are alternated one another on the surface of the body of the wear-resistant piece; and overlaying and filling a wear-resistant welding material in the blind holes. After the blind holes are overlaid and filled, the wear-resistant welding material is continuously overlaid on the surface to form a wear-resistant protective layer. The wear-resistant welding materials in different specifications can be adopted on the same body. The wear-resistant metal piece subjected to the overlaying process is subjected to thermal treatment to eliminate internal stress generated in welding. The method can meet the requirements on abrasion resistance, impact resistance, thick layer abrasion resistance and the like of the wear-resistant metal piece. The method is simple and reasonable, is easy to operate, and has low cost. The wear-resistant metal piece has good wear resistance, and the service life is remarkably prolonged. The method is suitable for companies manufacturing wear-resistant metal pieces.

The invention provides a composite water-proof layer for a railway ballast track concrete bridge deck and a construction method of the composite water-proof layer. The composite water-proof layer comprises a modified polyurethane compound finish paint layer, a modified polyurethane compound primer layer and a closed primer layer from top to bottom. The invention further provides raw material compositions of the modified polyurethane compound finish paint layer and the modified polyurethane compound primer layer and a preparation method of the modified polyurethane compound finish paint layer and the modified polyurethane compound primer layer. The composite water-proof layer is directly formed between the concrete bridge deck and a railway ballast by using a high-molecular material, a concrete protection layer does not need to be laid, the project cost of the concrete protection layer can be saved, the structure dead load can be reduced, and it is of an important significance in improving the durability of the railway concrete bridge. Moreover, the adhesive strength between the novel water-proof layer and the concrete bridge deck is high, and water breakthrough can be effectively reduced.

The invention discloses a robot gripper impact-resistant structure. The structure comprises an upper hanging plate and a lower hanging plate. The upper hanging plate and the lower hanging plate are installed and connected through air springs and a universal coupling, the universal coupling is installed inside the position between the upper hanging plate and the lower hanging plate, the air springsare circumferentially installed on the exterior with the universal coupling as the circle center, force balance is generated, and the impact-resistant capacity is formed. The robot gripper impact-resistant structure is simple in structure, low in manufacturing cost, high in rigidity and flexibility and strong in impact resistance, and is suitable for work of robot grippers under different environments.

The invention discloses a heat insulation composite plate of an outer wall. The heat insulation composite plate comprises an upper panel, a lower panel and a core material, wherein the upper panel and the lower panel are made of various building outer wall heat insulation materials; the core material is made of various heat insulation materials; two faces of the upper and lower panels are respectively provided with one layer of glass fiber gridding cloth and non-woven fabric; and strip-shaped heat insulation materials are between the upper plane and the lower panel; 2-3 mm of gaps exist among the strip-shaped heat insulation materials; and reinforcing ribs made of the building outer wall heat insulation materials are arranged in the gaps and wrapped with the glass fiber gridding cloth. The heat insulation composite plate of the outer wall, disclosed by the invention, has the advantages of capability of being produced continuously, once molding, no layering, high bonding strength, good toughness, impact resistance, weight reduced by 60%, easy construction, moderate single plate surface, easy splicing, capability of being sawn, nailed and anchored, convenience in operation, high construction speed, low comprehensive manufacturing price and capability of largely reducing the constructional engineering cost; and by means of the heat insulation composite plate, the weight of the building main structure is reduced, the construction of the heat insulation composite plate is more than two times faster than that of the traditional layered construction, the cost and time are saved, and the construction quality is largely improved.

The invention discloses an impact-resistant curved rod dot-matrix sandwiching board structure. A curved rod dot-matrix structure and a sandwiching board structure are combined to obtain the sandwiching board structure having light weight, high strength and strong impact resistance. The impact-resistant curved rod dot-matrix sandwich board structure consists of an upper surface board, a lower surface board, and a curved rod dot-matrix structure core layer, wherein the curved rod dot-matrix structure core layer is formed by single curved rod substructures extending in a space, and each single curved rod substructure is formed by a plurality of same-shaped curved rods crossed at equal angles. The curved rod dot-matrix structure is light in weight and high in strength, has good deforming capability and energy absorption efficiency under the effect of impact load, is combined with the sandwiching board structure to have good flexural rigidity and impact resistance and has broad applicationprospects in the fields of aerospace, civil engineering, machinery manufacturing and the like.

The invention relates to the technical field of pipeline engineering, and discloses a CIPP (cured in place pipe) for repairing a trenchless underground pipe network, and a preparation method and application of the CIPP. The CIPP for repairing the trenchless underground pipe network disclosed by the invention comprises a tubular fiber fabric, resin and a curing agent or a reactive diluent, whereinthe resin, the curing agent and the reactive diluent or the reactive diluent fill the fiber fabric; and the CIPP also comprises ultra-high-molecular-weight polyethylene, wherein the ultra-high-molecular-weight polyethylene is ultra-high-molecular-weight polyethylene particles or ultra-high-molecular-weight polyethylene fibers. The ultra-high-molecular-weight polyethylene has high impact strength,high wear resistance and low friction coefficient, so that the ultra-high-molecular-weight polyethylene is adopted as a single filler, then the CIPP can meet various repair performance requirements such as wear resistance, corrosion resistance, impact resistance, self-lubrication and the like, and meanwhile, the effects of simplifying formula, facilitating stirring and saving construction time areachieved. The ultra-high-molecular-weight polyethylene is safe and nontoxic, so that the CIPP provided by the invention can be used for repairing underground pipelines, and can also be used for repairing drinking water pipelines.

The invention provides a composite waterproof layer for a concrete bridge deck of a railway ballast track and a construction method of the composite waterproof layer. The composite waterproof layer comprises a concrete protective layer, a modified polyurethane paint layer and a sealing primer layer from top to bottom; and the invention also provides a polyurethane composition for forming the modified polyurethane paint layer and a preparation method of the polyurethane composition. According to the invention, the waterproof layer is formed by directly spraying or roll-coating polymer materialson the concrete bridge deck, and then the concrete protective layer is laid, so that the structure not only can avoid an own defect that an existing waterproof coil material is weak in bonding with the concrete bridge deck and effectively reduce occurrence of water channeling, but also prevent hidden dangers brought by more overlapping parts in construction of waterproof coiled materials; therefore, the invention is of great significance in improving durability of railway concrete bridges.

The invention relates to an oil-resistant static-conducting anticorrosive paint and a preparation method thereof and belongs to the field of chemical industry. The oil-resistant static-conducting anticorrosive paint comprises the following raw materials in part by weight: 50 to 54 parts of liquid epoxy resin, 5 to 9 parts of rutile type titanium oxide powder, 0.5 part of bentonite, 1 to 1.4 parts of polyamide anti-settling agent, 1 part of dispersant, 0.5 part of leveling agent, 0.1 part of antifoaming agent, 20 to 24 parts of conducting mica powder, 3 to 7 parts of superfine talcum powder, 4 to 8 parts of methyl isobutyl ketone (MIBK), 0.3 to 0.7 part of antistatic agent and 28 to 56 parts of dimethylbenzene. The oil-resistant static-conducting anticorrosive paint has the advantages of reasonable formula design, high conductivity, low cost, stable quality and high oil resistance, is difficult to deposit and agglomerate and is easy to disperse and clean.

The invention discloses an automobile spring material with good brittleness resistance and good rupture resistance. The automobile spring material consists of the following elements in percentage by weight: 0.3% to 0.8% of carbon, 0.2% to 0.3% of silicon, 1.8% to 2.0% of manganese, 1.2% to 1.8% of nickel, 0.02% to 0.04% of cobalt, 0.002% to 0.03% of aluminum, 0.2% to 0.24% of chromium, 0.01% to 0.03% of neodymium, smaller than or equal to 0.015% of sulfur, smaller than or equal to 0.015% of phosphorus and the balance of iron and inevitable impurities. The automobile spring material disclosed by the invention is capable of totally satisfying the automobile performance requirements on impact resistance, brittleness resistance and rupture resistance and is also capable of realizing batch production and lowering the cost.

The invention provides a production process of a solar heat collecting plate and a heat collecting panel utilized by the solar heat collecting plate. The production process comprises the following steps of: impacting a carbon-free steel plate to form the heat collecting panel with a groove; spraying a vitreous inorganic composite material on the light gathering surface of the heat collecting panel; sintering at high temperature; fusing the heat collecting panel with the inorganic composite material to form a novel black composite material; and fixing a heat conducting pipe filled with a superconducting medium on the groove in the back surface of the heat collecting plate by utilizing a high-temperature resistant adhesive, thereby forming the solar heat collecting plate with the enamel superconducting medium. The solar heat collecting plate provided by the invention is difficult in coating shedding, good in anti-vibration property, resistant to high temperature and low temperature, resistant to disaster weather such as hailstone, resistant to impact and difficult to break.

The invention discloses a tubing head and casing head device for oil development, and relates to the technical field of oil development devices. A hanger comprises an inner-layer coupling for being connected with first tubing and an outer-layer coupling for being connected with a first casing, and further comprises an inner positioning sleeve and an outer positioning sleeve which are arranged between the first tubing and the first casing, a locking mechanism, a slip and a sealing shell are sequentially connected to the outer wall from the first tubing to the first casing in a series mode, a sealing assembly is arranged in the sealing shell, a four-way joint comprises a main tube body connected with the first tubing, and four branch tube bodies fixedly communicating with the main tube body,and connecting length adjusting mechanisms connected with a to-be-connected part are arranged on the four branch tube bodies correspondingly. Through cooperation between the structures, on the one hand, the connecting length of the four-way joint is convenient to adjust, on the other hand, the hanger can automatically adjust the position of the first tubing and the first casing, so that the firsttubing and the first casing are centered and concentric.

The invention relates to the technical field of environmental art display devices, and particularly discloses a multi-angle display device for environmental art design. The device comprises a base, a stepping motor is fixedly mounted in the base, the top of the stepping motor is fixedly connected with a rotating rod with one end extending to the upper part of the base, the outer side of the rotating rod is movably connected with a sleeve, one end of the sleeve extends to the position above the rotating rod, two limiting grooves are formed in the outer side of the rotating rod, two limiting blocks are fixedly installed on the inner side wall of the sleeve, and one ends of the limiting blocks extend into the corresponding limiting grooves. According to the multi-angle display device for environmental art design, the problems that most of traditional multi-angle display devices for environmental art design only have rotary adjustment, but due to the absence of all-directional adjustment, certain influence exists when audiences appreciate environmental art works, and the effect of displaying the environmental art works cannot be maximized are solved.

The invention relates to an industrial abrasive belt based on a substrate formed by compounding a knitted fabric or woven fabric with a plastic film, and aims to solve the problem that the conventional product is low in sand-planting surface smoothness and mechanical property and overhigh in manufacturing cost. The abrasive belt comprises the knitted fabric or woven fabric and the plastic film bonded with the knitted fabric or woven fabric, wherein one of surfaces of the knitted fabric or woven fabric and the plastic film, which are far away from each other, is coated with primer; the surface coated with the primer is subjected to electrostatic sand-planting to form an abrasive layer; the knitted fabric or woven fabric is impregnated into or coated with glue; and the glue and the primer are one or more of urea formaldehyde and modified resin thereof, phenolic aldehyde and modified resin thereof, epoxy and modified resin thereof, and acrylic acid and modified resin thereof. The industrial abrasive belt formed by compounding the fabric with the plastic film has required impact resistance and mechanical property by using the flexibility and mechanical property of the fabric and the smoothness of the plastic film, and the manufacturing cost and using cost of the product are effectively reduced.