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318results about How to "Improve load resistance" patented technology

Polymethylmethacrylate waterproof paint and preparation method thereof

ActiveCN102140266AShort hardening timeEasy constructionCoatingsCross-linkCryogenic hardening
The invention relates to a polymethylmethacrylate waterproof paint and a preparation method thereof. The waterproof paint consists of components A and B, wherein the component A is a methacrylic acid resin liquid generated by reaction based on methyl methacrylate (MMA) utilized as a main composition, and the component B is an initiator. When the component A is prepared, a hard monomer, a soft monomer and a cross-linking monomer are put in a reaction kettle and evenly stirred, and then heating is carried out; polymethylmethacrylate moulding plastic is put, and then reaction is carried out for 1-6 hours at the temperature of 70-90 DEG C; cooling is carried out until the temperature is 50-65 DEG C, a polymerization inhibitor, an accelerator, sealing wax and a thixotropic agent are added and evenly stirred; and cooling is carried out until the temperature is 30-45 DEG C, and filtration and packaging are carried out so as to prepare the component A resin liquid. The components A and B are evenly stirred and mixed in a proper proportion, then coated, and finally solidified into a film. The waterproof paint has the characteristics of good strength, good elasticity, low temperature hardness, excellent weather resistance and the like, is simple and convenient for construction, can be solidified rapidly, and can be used for waterproof work of rapid transit railway bridge surfaces and super highway subgrades.
Owner:GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD

Method to Compress Prefabricated Deck Units By Tensioning Supporting Girders

A structural system comprised of prefabricated deck units spaced along longitudinal load-carrying members, which produce longitudinal axial compression in deck units by tensioning the longitudinal load-carrying members without the use of standard post-tensioning details. During construction, prefabricated deck units are erected on top of and supported by the longitudinal load-carrying members via leveling devices, which also permit relative motion between the longitudinal load-carrying members and the prefabricated deck units. Jacking apparatuses are used to introduce deck compression by jacking against the longitudinal load-carrying members. This system can be used for new structures and for deck replacement of existing structures.
Owner:HE YIDONG

Polyamide resin composition, expanded polyamide resin molding, and automotive resin molding

ActiveUS20130209784A1Superior heat resistanceReduce weightCasingsLayered productsChemistryPolyamide
Provided is a polyamide resin composition which can provide an expanded molding being superior in heat resistance and sufficiently reduced in weight and having high load resistance by a simple molding process. The polyamide resin composition is characterized by comprising a polyamide resin (A), a glycidyl-group-containing styrene copolymer (B) having two or more glycidyl groups per molecule, a weight average molecular weight of 4000 to 25000 and an epoxy value of 400 to 2500 Eq / 1×106 g and an inorganic reinforcing material (C) in a proportion such that the content of the glycidyl-group-containing styrene copolymer (B) is 0.2 to 25 parts by mass and the content of the inorganic reinforcing material (C) is 0 to 350 parts by mass relative to 100 parts by mass of the polyamide resin (A).
Owner:TOYO TOYOBO CO LTD

Reverse circulation construction technique and apparatus of single rope impact drill

The invention discloses a process and a device for the reverse circulation execution of a single rope impact drill, the reverse circulation execution device comprises a percussion drill, a slurry pumping pipe at the hole bottom and a slurry purifier at the hole mouth, the drill bit is composed of a drill bit body and a cutting blade, the drill bit body is composed of a hammer body, corner boards and a base, the upper end of the hammer body is provided with a connecting hold connected with a non-rotating rope, the corner boards are distributed in the same angle axially on the cylindrical or circular-tube-shaped hammer body, the base is composed of coaxial inner base and outer base, which are tube-shaped, the upper surfaces of the two base are in the same plane, the inner base is higher than the outer base, the lower ends of the corner boards are connected with the two bases, the hammer body, the corner plate and the base are integrated by welding, casting or riveting, the lower end of the base is evenly equipped with multiple cutting blades; pile types of various section shapes can be dilled by the drill bit, the reverse circulation process of hole bottom slag pumping is used when drilling, the execution process is fastened, the energy consumption is reduced, the slag is cleaned completely and clearly, the time for cleaning the hole is shortened.
Owner:张安禄

Toothed belt

ActiveUS20140206487A1Good environmental resistanceHigh load resistanceV-beltsDriving beltsEngineeringHigh resistance
A toothed belt is provided that has excellent environment resistance, high load resistance, high stiffness, and achieves high accuracy, light weight, compactness and low noise.A toothed belt is provided with a belt body including a plurality of core wires juxtaposed in the width direction of a rubber portion, a plurality of tooth rubber portions formed on one surface of the belt body, and a tooth cloth covering the surface of the tooth rubber portions. The rubber portion contains dioctyl sebacate and trimellitic acid ester in a mass part ratio of 1:19 to 1:1, the mass percentage of the dioctyl sebacate to the whole quantity of the rubber portion is less than 4 mass %, and the mass percentage of the total quantity of the dioctyl sebacate and the trimellitic acid ester to the whole quantity of the rubber portion is in a range from 4 mass % to 8 mass %.
Owner:TSUBAKIMOTO CHAIN CO

Tank container, tank body and processing method of tank body

The invention discloses a container tank body and a processing method thereof. The tank body is arranged in a frame with a square-shaped cross section and comprises a cylindrical main body part, end enclosures arranged at the two ends of the cylindrical main body part and fixedly connected with the cylindrical main body part, and a tank body strengthening device; the cylindrical main body part comprises a plurality of parts with an arc-shaped cross section, the parts are formed by the bending and welding of a same panel, and the cross section of the cylindrical main body part of the tank body is generally arranged between the square-shaped cross section of the frame and an inscribed circle of the square-shaped cross section. The invention also discloses a tank container comprising the tank body. As the cylindrical main body part is made by continuously bending a whole panel, the molding process is simplified so that the cylindrical main body part is only provided with one welding line, thereby remarkably lowering the leakage risk of the container tank body in use and improving the reliability of the container tank body in work; and the structure has quite strong self-anti-load capacity, thereby decreasing the number of the used tank strengthening devices and reducing own weight.
Owner:CRRC QIQIHAR ROLLING CO LTD

Method for treating eutrophication water body by hydrophyte

This invention relates to a method for purifying eutrophic water body by using water plant, particularly duck-weed and polycultured with other water plants. The adsorption, absorbing and biochemical reaction of said water plants are used for removing nitrogen, phosphorus and other pollutants. The plants occupies 70-90% of the surface of the water body. This invention has advantages of: simple operation, low management cost, obvious treatment effect, no secondary pollution, the water plants can be harvested as resource, being of a popularized treatment method for eutrophic water body.
Owner:NANJING UNIV OF TECH

Optimization design method of blades of wind turbine based on topology optimization of structure

ActiveCN102332044AReasonable intensity distributionReasonable distribution of stiffnessSpecial data processing applicationsHorizontal axisTopology optimization
The invention discloses an optimization design method of blades of a horizontal-axis wind turbine based on the topology optimization of the structure, each blade comprises a web plate (3), spar caps (3, 5) and a coating (1), and the design method comprises the following steps: adopting the existing blade design method to determine an aerodynamic shape parameter and the structural parameters of the blades; adopting the topology optimization method to perform opening design on the web plates and the spar caps of the structure; determining the initial design positions, the number and the sizes of openings through optimization calculation; and checking the strength, the rigidity and the fatigue of the structure of the blades obtained by the topology optimization, and further performing structural adjustment according to the check result so as to ensure that the blades have good structural performances. Through the design method of arranging openings on the web plates and the spar caps, the strength, the rigidity and the anti-fatigue performance of the structure of the blades can be kept, the weight of the blades is simultaneously reduced, not only is the cost of the blades reduced, but also the reducing of the loads of the blades is benefited.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI

Linear driving device and controlling and using method of linear driving device for solar tracker

The invention discloses a linear driving device and a controlling and using method of the linear driving device for a solar tracker. The linear driving device comprises an outer tube and a sealing end cover arranged at the end portion of the outer tube. A screw is arranged in the outer tube, one end of the screw is connected with a drive mechanism, a transmission nut in threaded match with the screw is arranged on the screw, and a telescopic rod is arranged between the outer tube and the screw. One end of the telescopic rod is connected with the transmission nut, the other end of the telescopic rod penetrates through the sealing end cover, a sealing assembly is arranged between the telescopic rod and the sealing end cover, and a waterproof oil-proof vent plug is arranged on the outer tube. The linear driving device is mainly used on the solar tracker, corresponding structural design is performed on the aspects of deflection, load resistance and protection of the device according to the using environment of the solar tracker, and the linear driving device applied in the solar tracker is reliable and stable in operation and strong in deflection and load resistance and accordingly improves the tracking accuracy of the solar tracker effectively.
Owner:CHENGDU ZSUN SCI & TECH DEVING

Giant magnetostrictive flap wind turbine blade vibration reduction system and control method

The invention discloses a giant magnetostrictive flap wind turbine blade vibration reduction system and a control method, belonging to the technical field of wind power generation. The invention adopts the technical scheme that the system comprises a giant magnetostrictive flap wind turbine blade, a wind speed measurement laser radar, an embedded vibration control card and an upper computer. The giant magnetostrictive flap wind turbine blade comprises three fiber optic strain sensors and three giant magnetostrictive actuators. The embedded vibration control card comprises an ARM (Advanced RISC Machines) main control chip, an FPGA (Field Programmable Gate Array) circuit, an A/D (Analog to Digital) converter, a first low pass filter, a signal conditioner, a voltage-controlled constant current source, a second low pass filter, a digital to analog converter and a USB (Universal Serial Bus) port. The giant magnetostrictive flap wind turbine blade vibration reduction system and the control method have the beneficial effects that vibration reduction of the wind turbine blade which is provided with flap structures is realized under small amplitude and low frequency, and the antijamming capability of the system is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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