Thin-walled steel fiber concrete pipe

Abstract

The invention relates to a thin-walled steel fiber concrete pipe, which consists of a bellmouth, a socket, a steel fiber concrete pipe core with a steel cylinder, a prestressed steel wire and a protective layer, wherein the bellmouth and the socket are coaxially fixedly arranged at two ends of the steel fiber concrete pipe core with the steel cylinder; the protective layer is fixedly arranged on an outer wall of the steel fiber concrete pipe core with the steel cylinder; the prestressed steel wire is wound on the outer wall of the steel fiber concrete pipe core with the steel cylinder between the steel fiber concrete pipe core with the steel cylinder and the protective layer; a ratio of a wall thickness d of the steel fiber concrete pipe core with the steel cylinder to an inner diameter D of the pipe core is mu, wherein mu is more than 1 / 32 and less than 1 / 16; and the prestressed steel wire has a thread pitch @ mm and a diameter phi mm, wherein @ is more than or equal to 2phi and less than or equal to 50. The thin-walled steel fiber concrete pipe has a simple integral structure, a scientific and reasonable design, low raw material cost, high production efficiency, a thin pipe wall, light weight, high permeability resistance and low transportation and construction cost, and the manufacturing process is simple.

Description

technical field [0001] The invention relates to a concrete pipe, especially a thin-walled steel fiber concrete pipe. Background technique [0002] Ordinary concrete pipes have to withstand strong external pressure loads and internal water pressures, so the concrete pipe core wall is designed to be thicker. It has been found that the national standard GB / T19685-2005 for prestressed steel cylinder concrete pipes has a clear The minimum tube core thickness in the table is not less than 1 / 16 of the tube diameter. Although it can meet the requirements of water delivery, with the increase in raw material costs and the guidance of the national energy-saving and emission-reduction policy, the quality of the tube is heavier and the tube Ordinary concrete pipes with large bodies are difficult to meet the requirements. [0003] After searching, it was found that the patent name is "Steel Sleeve Reinforced Concrete Pipe", the patent number is 200710059219.9, and the patent announcement...

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Problems solved by technology

[0002] Ordinary concrete pipes have to withstand strong external pressure loads and internal water pressures, so the concrete pipe core wall is designed to be thicker. It has been found that the national standard GB / T19685-2005 for prestressed steel cylinder concrete pipes has a clear The minimum tube core thickness in the table is not less than 1 / 16 of the tube diameter. Although it can meet the requirements of water delivery, with the increase in raw material costs and the guidance of the national energy-saving and emission-reduction policy, the quality of the tube is heavier and the tube Ordinary concrete pipes with large body are difficult to meet the requirements

[0003] After searching, it was found that the patent name is "Steel Sleeve Reinforced Concrete Pipe", the patent number is 200710059219.9, and the patent announcement number is CN101373034. Its structure mainly includes sockets, sockets, concrete pipe cores, steel skeletons, and prestressed steel wires As well as the protective layer, the socket and the socket are coaxially fixed at both ends of the concrete pipe core, and the steel skeleton is coaxially embedded in the concrete pipe core. A steel cylinder is fixed on the outer wall of the tube core, and a protective layer is fixed on the outer wall of the steel tube, and prestressed steel wires are wound on the outer wall of the steel tube between the steel tube and the protective layer; the wall thickness d of the concrete tube core is equal to the inner diameter D of the tube core The ratio is μ, 1 / 32≤μ≤1 / 16; the pitch of the prestressed steel wire is mm, the diameter of the prestressed steel wire is φmm, 2φ≤≤50, although this ordinary concrete pipe reduces the thickness of the concrete tube core, but The steel frame still consumes a large amount of steel, the cost is high and the welding workload is relatively large in production, which takes a long time and the production efficiency is low

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