8results about How to "Improve repairability" patented technology

The invention discloses a pure physical cross-linked dual-temperature-sensitive hydrogel and a preparation method of the pure physical cross-linked dual-temperature-sensitive hydrogel. The hydrogel is composed of N-isopropylacrylamide, hydroxyl-containing cellulose, sodium pyrophosphate (Na4P2O7) and an initiator, a chemical cross-linking agent is not needed, and a dual physical cross-linked network is formed through combination of photo-initiation or thermal-initiation polymerization and heating induced phase transformation. The obtained hydrogel shows two obvious temperature response transitions: poly (N-isopropylacrylamide) phase transition in a low-temperature region (about 15-35 DEG C) and thermal association of hydroxyl-containing cellulose in a high-temperature region (about 45-65 DEG C). The pyrophosphate ions enhance the network stability and mechanical strength of the gel through ion-dipole interaction. The hydrogel has excellent mechanical properties and sensitive dual-threshold thermal response characteristics, and can be used in the fields of flexible temperature sensors, bionic skins, temperature control switches, multi-temperature-zone environment monitoring and the like.

The present application is suitable for the technical field of laminated slab repair, and provides a laminated slab crack repair device, which comprises a vehicle body and further comprises: a swing rotating assembly connected with the vehicle body through a lifting assembly, the lifting assembly being used for supporting and driving the swing rotating assembly to lift; a repair agent scraping assembly and a polishing assembly, the swing rotating assembly being provided with the repair agent scraping assembly and the polishing assembly, the swing rotating assembly being used for driving the repair agent scraping assembly to reciprocate, the repair agent scraping assembly being used for discharging repair agent and cooperating with the reciprocation to repair the laminated slab crack, and the swing rotating assembly being further used for driving the polishing assembly to rotate, so that the polishing assembly is used for polishing the repaired area after the repair agent scraping assembly is removed. The present application realizes the automatic operation of repair agent scraping and polishing, improves the repair quality, reduces manual operation, and significantly improves the construction efficiency and intelligent level.

This invention relates to the field of unmanned aerial vehicle (UAV) technology, specifically to an omnidirectional crash-resistant UAV with a series multi-level composite buffer structure. The UAV includes a flight control platform with a cargo box connected to its bottom. Support frames are connected to both sides of the cargo box, and rotors are mounted on the top of each support frame. Each support frame includes an X-shaped mounting bracket with two upper extensions and two lower extensions, the upper extensions being located above the lower extensions. The rotors are connected to each upper extension, and ground-contact pads are connected to each lower extension. An upper shock-absorbing buffer device is positioned between the upper extensions and the rotors. This invention utilizes the upper shock-absorbing buffer device on the upper extensions to absorb and buffer the powerful impact energy from the ground when the UAV contacts the ground, thereby protecting valuable onboard equipment and cargo.

The application discloses a preparation method of a recyclable and easy-to-repair epoxy resin, and the recyclable and easy-to-repair epoxy resin is prepared from an epoxy resin containing a borate ester structure or a mixed resin composed of the epoxy resin containing the borate ester structure and a conventional epoxy resin after curing; the structural formula of the epoxy resin containing the borate ester structure is shown in the following formula (I), wherein R is selected from one or more of the following formula (II-1), (II-2) and (II-3); the preparation method disclosed by the application is suitable for conventional types of epoxy resins in the field and has universality; and the prepared product has recyclability and repairability and also has high strength.

The application discloses a whole pouring method and structure of a blast furnace hearth instead of cooling wall, wherein the inner side of a furnace shell is directly provided with a lining formed by pouring high-thermal-conductivity unshaped refractory material; a plurality of holes are formed in the furnace shell, and cooling elements are arranged in the holes; one end of the cooling elements is embedded in and penetrates through the lining and is in close contact with the lining, so that the cooling wall is cancelled, air gap thermal resistance is avoided, the cooling elements are directly in contact with the high-thermal-conductivity refractory material, heat can be rapidly and directly transmitted to a cooling system, the cooling efficiency is greatly improved, and a protective slag iron shell is easily formed on a hot surface of the hearth; the whole pouring structure is free of any brick joint, and penetration and corrosion of molten iron and alkali metal are avoided; high thermal conductivity ensures that the temperature field of the lining of the hearth is uniformly distributed and thermal stress is small, and the risk of ring crack of the traditional structure is fundamentally eliminated; if abnormal corrosion occurs in a local region, the on-line repair can be carried out by using the pressing-in technology, maintenance cost is low, and the service life of one generation of blast furnace is prolonged.

The application discloses a kind of wear-resistant and corrosion-resistant integrated structure of deep groove ball bearing for vehicle, and relates to the technical field of deep groove ball bearing, including main body mechanism, the outside of the main body mechanism is provided with detection mechanism for detecting its internal grease adhesiveness;By setting detection mechanism, the probe of micro viscosity sensor is inserted in the inside of detection channel, the oil supplement pipe is inserted in the inside of supplementary hole, the signal connection of micro viscosity sensor and micro oil pump is established using controller, the viscosity of grease is monitored using micro viscosity sensor, the signal of detection is sent to controller, the threshold value is judged using controller, when the viscosity of grease is greater than the set threshold value, micro oil pump is started automatically, the lubricant is supplemented, the viscosity of grease is reduced, the influence of high viscosity of grease on lubrication effect is avoided, the lubrication structure of deep groove ball bearing is optimized, the overall wear-resistant and corrosion-resistant performance is improved, the service life is also prolonged, and the maintenance cost is also reduced.

The application discloses a microbial remediation agent for heavy metal remediation and a preparation method and application thereof, and is prepared by loading pseudomonas aeruginosa on a carrier; the carrier comprises the following components in parts by weight: 8-22 parts of chlorella vulgaris algae liquid, 1-3 parts of silicon fertilizer, and 1-3 parts of nano zero-valent iron; the silicon fertilizer is obtained by calcining a mixture of granite stone powder, marble powder and alkali activator at a mass ratio of 8-12:0-12:0.5-4; and the alkali activator is solid sodium hydroxide or potassium hydroxide. The microbial remediation agent has high activity, fast reproduction, is environment-friendly and pollution-free, and is low in cost; can change the form of heavy metals, converts the heavy metals from a high-toxicity form into a low-toxicity form, reduces the toxicity and migration of the heavy metals, and significantly reduces the pollution caused by the heavy metals.