The utility model relates to the technical field of fas […]
The utility model relates to the technical field of fasteners, more specifically an FRP hexagonal flange bolt, comprising an FRP nut and an FRP screw. The FRP nut is provided with a through hole along the axial direction. The outer peripheral wall of the FRP screw is connected to the FRP nut. The inner peripheral wall of the hole is respectively provided with mutually matched threads, the FRP nut is screwed on the FRP screw and fixed by epoxy resin bonding, and the bottom of the FRP nut is provided with a raised FRP flange. The bolt FRP nut of the present invention is screwed between the FRP screw rods with mutually matched threads, and after the FRP nut is screwed on the hex flange concrete screw, it is fixed by epoxy resin to form an epoxy resin bonding layer, that is, through the thread + The structure of the bonding layer enhances the bonding force between the nut and the screw, and at the same time has extremely excellent electrical insulation properties, free of maintenance, especially suitable for electricity, marine, chemical and pharmaceutical requirements for insulation, high corrosion resistance, high shear resistance and high torque In the special structural parts.
At present, bolts are commonly used fasteners. They are widely used in real life as structural connectors, such as in housing construction, railway, highway and bridge construction, engineering construction, and furniture industry. Hexagon flange bolts are commonly used high-strength fastening bolts for steel structures. They are composed of hexagonal bolt heads, flanges and screws. They are usually used in conjunction with hexagonal flange nuts and are mainly used to fasten and connect two Through-hole parts. Fiber reinforced plastics (FRP) are prepared by infiltrating synthetic resins (such as epoxy resins, vinyl ester resins, phenolic resins, etc.) into reinforcing fibers (such as glass fibers, carbon fibers, aramid fibers, etc.). Fiber reinforced plastics are generally used in various areas that require electrical insulation, thermal insulation, and non-magnetic properties, and they are also used as structural reinforcement materials in civil engineering and construction industries. Fiber-reinforced plastics are also used to make articles, such as bolts or nuts used to hold substances in place. At present, the most commonly used bolts are ordinary metal materials, which have high weight, no insulation, high thermal conductivity, and no corrosion resistance. However, the use of special metals with high acid and alkali resistance is still too expensive and has a limited service life. Plastic bolts have low tensile strength, poor shear resistance, low torque, and their corrosion resistance and insulation still cannot reach the high shear resistance, high torque, and high corrosion resistance of special fields such as high-voltage circuits, transformers, and marine engineering. However, the production of FRP bolts cannot be produced by FRP pultrusion. The characteristics of the material itself determine that the strength cannot reach the level of metal fasteners. Therefore, how to provide a reasonable structure of FRP bolts has become the current Problems to be solved. An FRP hexagonal flange bolt, comprising an FRP nut I and an FRP screw 2. The FRP nut I is provided with a through hole along the axial direction. The outer peripheral wall of the FRP screw 2 and the inner peripheral wall of the through hole of the FRP nut I are respectively provided with mutual With matching threads, the FRP nut 1 is screwed on the FRP screw 2 and fixed by epoxy resin bonding, and a raised FRP flange 3 is provided at the bottom of the FRP nut 1. For the above-mentioned FRP hexagonal flange bolts, the axial length of the FRP nut I is 1.5-2 times the nominal diameter of the FRP screw rod 2. The FRP nut I and the FRP flange 3 are an integral structure.