18results about How to "Cover tightly" patented technology

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention discloses a graphene-coated hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of hard carbon negative electrode materials. The preparation method of the graphene-coated hard carbon negative electrode material comprises the following steps: carrying out pretreatment and three-step soaking on coconut shells, carrying out biomass carbonization, mixing with a microbial suspension, and adsorbing to obtain a microbial adsorption type hard carbon material; and then carrying out surface treatment, chemical vapor deposition, impregnation, secondary chemical vapor deposition and annealing treatment on the microbial adsorption type hard carbon material to obtain the graphene coated hard carbon negative electrode material. The negative electrode material prepared by the method is high in first discharge capacity, high in first coulombic efficiency and good in cycle performance.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The application discloses a kind of composite heat-conducting fillers, the composite heat-conducting filler is graphene oxide wraps aluminium oxide composite heat-conducting filler, wherein aluminium oxide is in situ grown on the surface of graphene oxide, then through special drying technique to form the microsphere structure of graphene oxide wrapping on the surface of aluminium oxide.The application also discloses a kind of graphene in-situ modified heat-conducting gel, containing the composite heat-conducting filler described above.The application also discloses its preparation and application.In the product prepared in the embodiment of the application, graphene is wrapped on the surface of aluminium oxide, and the two are mutually overlapped, mutually synergistic, form the special compounding effect of two-dimensional and zero-dimensional spherical, construct three-dimensional, extensive heat-conducting network structure, realize high thermal conductivity and high extrusion rate under lower filling amount.

This invention relates to the field of sodium-ion battery technology, and discloses a sodium-ion cathode material, its preparation method and application, a sodium-ion battery, a sodium-ion battery pack, and a device. The sodium-ion cathode material includes a matrix and a coating layer covering the matrix; the matrix has the composition shown in Formula I: Na 1‑x [Ni y Mn z M u Ti v O2 Formula I; the coating layer has the composition shown in Formula II: Na 2‑β Ti 6‑α M′ α O 13 Formula II. This sodium-ion cathode material possesses characteristics such as high ionic and electronic conductivity, strong structural stability, and strong chemical stability. Furthermore, using this composite cathode material in sodium-ion batteries can effectively improve the battery's electrochemical performance.

This invention relates to the field of battery technology, and more particularly to a positive electrode lithium replenisher, its preparation method, a positive electrode sheet, and a lithium battery. The aforementioned positive electrode lithium replenisher includes a core and a shell, with the shell covering the surface of the core to isolate the core from the side reaction environment. The core is a lithium-rich material, specifically at least one of Li5FeO4, Li5ReO6, and Li6CoO4. The shell is cobalt boride. This core-shell structured positive electrode lithium replenisher with cobalt boride as the shell effectively coats the core material, improves the air stability of the positive electrode lithium replenisher, reduces residual alkali, and thus enhances the battery's energy density and cycle performance.

This invention belongs to the field of laser cutting technology for automotive lamp covers, specifically a laser cutting and trimming device for the outer periphery of an automotive lamp cover, including a laser trimming machine base; a first guide rail frame is fixedly connected to the laser trimming machine base; an electric slide is slidably connected to the first guide rail frame; the lamp cover is fixed by four limiting pressure plates pressing down synchronously. When the laser cutting head cuts the flash and sprue material along the outer periphery, if it is about to reach a certain locking point, the corresponding connecting component will first release the locking of the pressure plate at that point, and then the second electric slider will drive the central slide plate and pressure plate away, while the other pressure plates remain locked. After cutting the position, the locking is reset, and all locking positions are completed in sequence. This multi-point pressing and single-point clearance fixing method replaces the situation where the traditional locking structure blocks the cutting path, improving the cutting integrity and processing quality. At the same time, the connecting component can slide on the central slide plate, so that the limiting pressure plates can adapt to different lamp cover shapes, replacing the traditional single-specification locking structure.

The utility model discloses a cable rope wrapping tape device, and relates to the technical field of cable rope wrapping, the cable rope wrapping tape device specifically comprises a wrapping installation main body, a wrapping assembly and an auxiliary mechanism, the wrapping installation main body is installed on a conveying travelling crane and can move along the axial direction of a cable rope along with the conveying travelling crane; the wrapping assembly is installed on the wrapping installation body and located at the advancing end of the wrapping installation body, the wrapping assembly rotates around the cable in the circumferential direction at a constant speed so that the cable can be wrapped with the wrapping belt, the auxiliary mechanism is installed on the wrapping installation body and located at the end opposite to the wrapping assembly, and the wrapping belt wrapping the cable is pressed through the auxiliary mechanism. According to the wrapping device, it can be ensured that a wrapped wrapping tape is tight, not loose, uniform and stable, and meanwhile the diameter of a wrapping cable can be correspondingly adjusted according to different needs so that the adaptability and practicability of the wrapping device can be improved.

The present invention discloses a hydrophobic double-shell isocyanate type self-repairing microcapsule and its preparation method and application, belonging to the technical field of polymer chemistry. First, TMP and IPDI monomers are used to prepare a multifunctional isocyanate prepolymer core material TMP-IPDI, and then polyurethane is used as a wall material, and the obtained core material and fluorescent agent 4,4-bis (2-sodium disulfonate styrene) biphenyl are used to prepare fluorescent isocyanate type self-repairing microcapsule powder; finally, the obtained fluorescent isocyanate type self-repairing microcapsule is secondary coated with silicon dioxide modified with tridecafluorooctyl trimethoxysilane to obtain a hydrophobic double-shell isocyanate type self-repairing microcapsule. The operation of the present invention is simple, and the prepared microcapsule has high self-repairing efficiency and good compactness. It can be used as a coating filler to repair coating microcracks, and has the functions of hydrophobicity and corrosion resistance.

This utility model discloses a heat dissipation fixture and heat dissipation connector for a steering gear durability test, relating to the field of steering gear technology. It includes a first heat-conducting plate and a second heat-conducting plate detachably connected to the first heat-conducting plate. The first heat-conducting plate has a first arc-shaped groove, and the second heat-conducting plate has a second arc-shaped groove. When the first and second heat-conducting plates are connected together, the first and second arc-shaped grooves together form a through hole for covering the motor housing. The second heat-conducting plate has a connecting hole for connecting a water-cooled heat dissipation component. In use, the first and second arc-shaped grooves are respectively engaged on the outer peripheral wall of the motor housing. The water-cooled heat dissipation component is connected to the second heat-conducting plate, and heat is dissipated from the motor through the second and first heat-conducting plates, achieving tight coverage and heat conduction, significantly improving heat dissipation efficiency.

The utility model belongs to the technical field of DLP display screens and discloses a waterproof DLP display screen which comprises a case, a DLP screen is arranged on the front face of the case, and the waterproof DLP display screen further comprises a waterproof component arranged on the front face of the case and used for improving the sealing performance of the edge of the DLP screen; the waterproof component comprises a fixed frame, a cavity is formed in the fixed frame, a first fixed shaft is installed in the cavity, the outer surface of the first fixed shaft is sleeved with a movable plate, an extrusion plate is installed on one side of the movable plate, a rubber bag is arranged on the inner side of the extrusion plate, and a plurality of movable frames are hinged to the outer side of the extrusion plate. And a connecting frame is hinged between two adjacent groups of movable frames. The two extrusion plates are driven to move mutually through the movable plate and the first fixing shaft, so that the rubber bag can be extruded through the extrusion plates, the DLP screen is wrapped by the rubber bag more tightly, and the rubber bag is tightly attached to the edge of the DLP screen all the time to maintain the sealing effect of the DLP screen.

The present invention relates to the technical field of agricultural machinery, and specifically discloses a saline-alkali farmland planting ridging and film covering device, including a connecting unit, a film placing unit and a film covering unit. By installing a frame and a first connecting bracket and reliably connecting with a traction machine, it is ensured that during the ridging and film covering process, the device can move along a predetermined track to ensure the accuracy and consistency of the operation; in addition, through the soil turning component fixed on the fixed plate, the soil can be turned over before ridging and film covering, so as to improve the soil structure and make the soil looser, which is conducive to the growth of crop roots and the penetration of water and nutrients. Through the coordinated cooperation between various components, key issues such as stability, sealing and adaptability in the film material transportation and film covering process are effectively solved, providing efficient and reliable technical support for saline-alkali land crop planting, and helping to improve the agricultural production efficiency and ecological environment improvement of saline-alkali land.

The invention relates to a sealed bottle cap and a sealed bottle. The bottle cap comprises an inner sleeve, an inner cover and a sealing assembly. The sealing assembly is arranged inside the inner sleeve. The sealing assembly comprises an inner plug and a sealing valve. The top of the inner plug is clamped with the inner sleeve, and the bottom is plugged on the inner wall of the bottle mouth. The inner plug is provided with a channel communicating with the bottle. The top of the sealing valve passes through an opening and abuts against the inner cover. The bottom end of the sealing valve covers the inner plug to block the channel, and forms a sealing structure of the bottle mouth with the inner plug. The sealing valve comprises a cover plate, a resistance section and a plug-in section. The top surface of the cover plate is fixedly connected with the resistance section. The top of the resistance section passes through the opening and abuts against the inner cover, and the diameter of the resistance section is smaller than the aperture of the opening. The bottom surface of the cover plate contacts with the top end surface of the inner plug but is not fixed. The plug-in section is fixedly connected at the center of the bottom surface of the cover plate, and the plug-in section extends into the channel and is located in the bottle mouth. The sealed bottle cap has good sealing performance, and liquid waste and pollution are avoided.

This utility model relates to the field of busbar technology, and particularly to a high-temperature resistant insulating busbar. A high-temperature resistant insulating busbar includes a busbar conductor, the outer surface of which is coated with ceramic silicone, the outer surface of which is coated with fiberglass cloth or a polyimide film, and the outer surface of which is coated with a polyamide insulating layer. This utility model utilizes the complementary properties of polyamide and ceramic silicone to solve the problem of decreased mechanical properties and loss of insulation performance of traditional materials at high temperatures. Through the development of special pretreatment and composite processes, the interfacial bonding force between polyamide and ceramic silicone is enhanced, preventing delamination and peeling under high-temperature thermal stress. This achieves a uniform and dense coating of the insulating layer on the busbar surface, eliminating defects such as bubbles and impurities, and ensuring that the busbar still possesses reliable insulation performance and mechanical strength under high-temperature environments.

The utility model discloses a labeling machine with an adhesive tape winding seal. The labeling machine comprises an explosion-proof cabinet, an inlet conveyor, a first pushing cylinder group, a positioning rotating mechanism, an adhesive tape winding mechanism, a labeling conveyor, a labeling device, a second pushing cylinder group and a discharging conveyor. The first pushing air cylinder set is located at the left end of the inlet conveyor. The positioning rotating mechanism is located below the first pushing air cylinder set. The right end of the labeling conveyor is connected with the positioning rotating mechanism; an adhesive tape winding mechanism is further mounted below the positioning rotating mechanism; the labeling device is mounted below the middle of the labeling conveying device; and the upper part of the second pushing air cylinder group is connected with the right end of the discharging conveyer. According to the automatic labeling machine, the cans are sealed by winding adhesive tapes, automatic labeling is realized, and the labor cost is effectively reduced. And the first side roller and the second side roller are arranged for pressing, covering is tight, and the attractiveness of the winding adhesive tape is improved. And through the positioning rotating mechanism, the can is ensured to rotate without circumferential runout, and the tape winding precision is improved.

The utility model discloses a packaging box, which belongs to the technical field of wine packaging and comprises a containing box, and a box cover capable of being opened and closed is arranged on the side face of the containing box. The side face of the containing box is connected with an outer wrapping piece, and the outer wrapping piece is arranged around the outer side face of the containing box and wraps the containing box. The outer wrapping piece is connected with a locking piece, and the locking piece locks the wound outer wrapping piece and the containing box. The outer wrapping piece is wound on the outer side face of the containing box and wraps the containing box, and the box cover and the containing box are wrapped by the outer wrapping piece, so that the packaging box not only has excellent leakproofness, but also conforms to the aesthetic sense of a traditional picture scroll in China. The locking piece can keep the wound outer wrapping piece to be locked with the containing box, the wound outer wrapping piece is prevented from loosening, the leakproofness of the packaging box is further improved, and the overall structure is simple.

This utility model discloses an installation structure for water supply pipes on roads and bridges, belonging to the field of pipeline installation technology. It aims to solve the problems of low reliability and short lifespan caused by vibration, leakage, and corrosion in existing structures. It includes a triangular support plate, a pipe, and protective components positioned between them. The protective components include a rubber tube sleeved on the outer wall of the pipe, an arc-shaped steel plate supporting the pipe, and an arched pipe clamp spanning the top. The arched pipe clamp is connected to the triangular support plate through a fixing component to clamp and fix the pipe. This utility model achieves the beneficial effects of vibration reduction, corrosion prevention, safety, reliability, and significantly extended service life by using a rubber tube as a buffer and anti-corrosion isolation layer, and utilizing the matching arc surfaces of the arc-shaped steel plate and the arched pipe clamp to achieve tight coverage and stable fixation of the pipe.

The present invention relates to a novel emulsified granular ammonium nitrate-oil explosive and a preparation method thereof, wherein the components include: liquid diesel, porous granular ammonium nitrate and colloidal diesel, and additives; the colloidal diesel includes diesel, a thickener and an emulsifier. In the present application, the colloidal diesel is innovatively used as a composite oil phase to replace the latex matrix. On the one hand, the latex matrix does not need to be produced separately, and on the other hand, the colloidal diesel has strong viscosity and can tightly coat the ammonium nitrate particles and lock the diesel in the pores of the ammonium nitrate particles; after the colloidal diesel is added, the explosive can maintain good viscosity for a long time and is not easy to agglomerate; in general, the present application overcomes the defects of easy seepage of diesel, agglomeration and hardening, and prolongs the storage period of the emulsified granular ammonium nitrate-oil explosive.