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45results about How to "Little change in appearance" patented technology

Tensioning and anchoring device for prestressed fiber cloth reinforced beams and construction method of device

The invention discloses a tensioning and anchoring device for prestressed fiber cloth reinforced beams and a construction method of the device. The device comprises fixed supports, a fixed end anchorage device, a tensioning end anchorage device, clamping pieces, short anchoring screws, long anchoring screws, chemical bolts, fiber cloth, a prestress application frame and a jack, wherein the fixed supports, the fixed end anchorage device and the tensioning end anchorage device are cuboid; the fixed supports are fixed with a to-be-reinforced beam through the chemical bolts; the fixed end anchorage device and the tensioning end anchorage device are connected with the fixed supports through the short anchoring screws and the long anchoring screws respectively; a rectangular through seam allowing the fiber cloth to pass is formed in the fixed end anchorage device; wedge-shaped holes allowing insertion of the clamping pieces are formed in the tensioning end anchorage device, and the clampingpieces are wedged into the wedge-shaped holes, so that clamping of the fiber cloth is realized. The construction method comprises steps as follows: firstly, the anchorage devices are mounted, then thefixed supports are assembled and the anchorage devices are fixed, finally, the prestress application frame and the jack are mounted, and tensioning and anchoring are implemented. The device is reasonable and simple in structure and convenient to operate and can be reused, and the applied prestress is large.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

Construction method of prestressing force fiber cloth reinforcing column adopting detachable tensioning anchorage device

The invention discloses a construction method of a prestressing force fiber cloth reinforcing column adopting a detachable tensioning anchorage device. A prestressing force fiber cloth tensioning andanchoring device adopting a detachable tensioning anchorage device comprises two anchor plates, two clamping plates, two tensioning anchorage devices, two tensioning screw rods, two anchoring screw rods and a fiber cloth. The construction method comprises the following steps of determining a position to be reinforced, performing grinding, performing hole repairing, and coating an epoxy glue layer;then completing the connection of the fiber cloth with the tensioning anchorage devices, as well as the connection of the anchor plates with the clamping plates; wrapping the position to be reinforced and coated with the epoxy glue layer with the connected fiber cloth; screwing the tensioning screw rods to exert prestressing force on the fiber cloth; synchronously screwing the anchoring screw rods to maintain the prestressing force on the fiber cloth; unscrewing big bolts between the tensioning anchorage devices and the clamping plates; and discharging the tensioning anchorage devices and thetensioning screw rods, so that the reinforcing construction of a reinforced concrete pier can be realized. The construction method disclosed by the invention is good in reinforcing effects and convenient to operate; and the tensioning anchorage devices and the tensioning screw rods can be disassembled and repeatedly used, so that the cost is saved.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

Preparation method and application of oil resistant rubber applied under railroad switch

The invention discloses an oil resistant rubber applied under a railroad switch. The oil resistant rubber comprises, by weight, 100 parts of acrylonitrile-butadiene rubber N41 as a big material, 45-65 parts of reinforcing agent and 15-25 parts of anti-wearing agent as middle materials, 4-8 parts of vulcanizing agent, 3-5 parts of accelerant, 1-4 parts of anti-aging agent, 2-4 parts of coupling agent and 1 part of octadecanoic acid as small materials. The invention further provides a preparation method and application of the oil resistant rubber applied under the railroad switch. The oil resistant rubber applied under the railroad switch has the advantages of being good in performance, and high in cost effectiveness. The novel type oil resistant rubber cushion plate applied under railroad switch prepared by using the oil resistant rubber applied under railroad switch can fully meet the railway industry standard TB/T2626-1995 and the high speed railway standard TB/T3395.(1-5) 2015 technical standard, and has little appearance change and stable physical properties, has an oil resistant index more than four times higher than the traditional rubber cushion plate applied under the railroad switch, has an oil absorption rate below 1.53-2.96%, which all prolong the service life of the rubber cushion plate applied under the railroad switch.
Owner:武威复兴华通铁路器材有限公司 +1

Low-filling efficient synergistic flame-retardant nylon 66 and preparation method thereof

PendingCN114133734AImprove mechanical propertiesSolve the problem of mechanical performance degradationAluminium hydroxideAntioxidant
The invention belongs to the technical field of modified nylon materials, and particularly relates to low-filling efficient synergistic flame-retardant nylon 66 and a preparation method thereof. The low-filling efficient synergistic flame-retardant nylon 66 comprises the following components in parts by mass: 88-92 parts of nylon 66; 6.5 to 10 parts of a composite flame retardant; 0.1 to 0.2 part of a dispersant; 0.1 to 0.2 part of an antioxidant; 0.7 to 3 parts of an inorganic nano filler; wherein the composite flame retardant comprises the following components in parts by mass: 2-4 parts of aluminum hypophosphite; 0 to 1 part of hexaphenoxy cyclotriphosphazene; 1 to 3 parts of aluminum diethyl hypophosphite; 0-2 parts of ammonium polyphosphate; 0 to 3.5 parts of nano aluminum hydroxide; and 0-2 parts of magnesium oxide. The inorganic nano filler comprises nano silicon dioxide with the particle size of 10-50nm, montmorillonite and nano aluminum oxide. The flame-retardant nylon 66 at least comprises one or more of the composite flame retardant and the inorganic nano filler, when the adding amount of the composite flame retardant is 10% or below, the flame-retardant level of the prepared flame-retardant nylon 66 can reach the UL94 V-0 level, and the tensile strength and the impact strength of the prepared flame-retardant nylon 66 are greatly improved.
Owner:INST OF NEW MATERIALS & IND TECH WENZHOU UNIV

Tensioning and anchoring device for multi-layer pre-stressed fiber cloth reinforced beam

ActiveCN110029593AImprove reliabilitySolve the problem of unequal lengthBridge erection/assemblyBridge strengtheningFiberPre stress
The invention discloses a tensioning and anchoring device for a multi-layer pre-stressed fiber cloth reinforced beam. The tensioning and anchoring device comprises a fixing end supporting seat, a tensioning end supporting seat, a fixing end anchorage, a tensioning end anchorage, clamping sheets, an anchoring long screw rod, an anchoring short screw rod, chemical bolts, fiber cloths, a pre-stress applying frame and a jack; each of the fixing end supporting seat and the tensioning end supporting seat is a T-shaped body, each of the fixing end anchorage and the tensioning end anchorage is in a cuboid shape, the fixing end supporting seat and the tensioning end supporting seat are fixed to a to-be-reinforced beam through the chemical bolts, the fixing end anchorage is connected with the fixingend supporting seat through the anchoring short screw rod, and the tensioning end anchorage is connected with the tensioning end supporting seat through the anchoring short screw rod; and the fiber cloths are clamped by the two clamping sheets, thus the fiber cloths are wedged into a wedge-shaped through seam in the tensioning end anchorage, and thus the fiber cloths are anchored. The tensioningand anchoring device is simple in structure and convenient to operate, the multiple layers of the fiber cloth are subjected to force evenly, the high prestress can be applied, and the pre-stress applying frame can be repeatedly used.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

Construction method for strengthening reinforced concrete pier column by using prestressed fiber fabrics

The invention discloses a construction method for strengthening a reinforced concrete pier column by using prestressed fiber fabrics. A prestressed fiber fabric strengthening device is arranged. The prestressed fiber fabric strengthening device comprises two jacket plates, two wedge sheets, two threaded rods and fiber fabrics; the fiber fabrics are wound on the wedge sheets for two circles; the wedge sheets wound with the fiber fabrics are inserted into wedge sheet grooves in bodies of the jacket plates; the fiber fabrics are wound on the jacket plates for two circles; and the other ends of the fiber fabrics are treated by using the same mode. The fiber fabrics connected with the jacket plates and the wedge sheets surround the strengthened reinforced concrete pier column for one circle. Threaded rod holes in jacket plate anchoring heads at the upper and lower ends of the two jacket plates are aligned with each other; the two threaded rods penetrate into the threaded rod holes in the jacket plate anchoring heads; and the two threaded rods are synchronously tightened to apply prestress to the fiber fabrics so as to finish reinforcing construction to the reinforced concrete pier column. The prestressed fiber fabric strengthening device used by the construction method for strengthening the reinforced concrete pier column by using the prestressed fiber fabrics has the advantages ofsimple structure, convenient construction method operation and high implementing efficiency.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY

A high temperature and strong corrosion resistant sensor applied to radio frequency admittance level gauge

The invention belongs to the technical field of measurement of a fluidized bed material level in uranium conversion production, and particularly relates to a high-temperature-resistance strong-corrosion-resistance sensor applied to a radio frequency admittance level indicator. The sensor is installed in a sensor sealing and locking bin on the radio frequency admittance level indicator through a thread, the inside of the sensor is of a structure connected in a casing pipe type, and is provided with a center connecting pipe, a second mica insulating pipe, a shielding layer connecting pipe, a first mica insulating pipe and an earth pole from inside to outside in sequence; a screw is arranged inside the sensor sealing and locking bin, and penetrates through the center of the sensor, is in rigid connection with a center feeler lever, and makes the earth pole, an earth pole sealing ring groove, a first graphite sealing mat, a first barite insulating pipe ring, a second graphite sealing mat, a shielding layer electrode, a third graphite sealing mat, a second barite insulating ring, a fourth graphite sealing mat and a center feeler lever sealing ring groove closely pressed together from top to bottom in sequence; the barite has high corrosion resistance to hydrofluoric acid, and can meet using requirements for fluidized bed material level measurement in the uranium conversion production.
Owner:CNNC SEVENTH RES & DESIGN INST CO LTD
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