Down-the-hole radial gate with multiple frames and multiple trunnions and two lifting pad eyes

Abstract

The invention discloses a down-the-hole radial gate with multiple frames and multiple trunnions and two lifting pad eyes. The down-the-hole radial gate with the multiple frames and the multiple trunnions and the two lifting pad eyes is characterized in that a multiple frame structure is adopted in the door body structure of a gate (1), and the gate (1) is hinged with a group of trunnions (4) installed on a breast wall (3) of a gate wall (2). The down-the-hole radial gate with the multiple frames and the multiple trunnions and the two lifting pad eyes reduces loads distributed to each main beam and each support arm through the multiple frame structure, shares huge concentrated water pressure of a high water head of a drainage port to the gate through the plurality of trunnions, and the loads distributed to each trunnion are greatly reduced so as to reduce the difficulties of the design, manufacture, welding, transportation and installation of the gate and the casting of the trunnions. The radial gate is provided with the two lifting pad eyes, is operated by adopting a double-cylinder swinging type or a suspension type hydraulic cylinder, the volume of single cylinder hydraulic cylinder is reduced by half so as to reduce the difficulties of the design, manufacture and installation of the hydraulic cylinder. The rotating center of the gate coincides with the circle center of an arc-shaped water-facing surface, and the total water pressure acting on the arc-shaped water-facing surface is enabled to always pass through the rotating center of the trunnions so as to reduce the force of the opening and closing of the gate.

Description

technical field [0001] The invention relates to a submersible arc gate with multiple frames, multiple hinges and double lifting points, which belongs to the technical field of hydraulic discharge gates. Background technique [0002] The submersible arc gate is a gate type widely used in water conservancy and hydropower projects. It has an arc-shaped water-retaining surface. It is composed of a gate, an arm and a hinge. It is an important water release and water retaining facility for hydropower stations. With the development of science and technology and the vigorous development of the country's "West-to-East Electricity Transmission", a large number of water conservancy and hydropower projects have been built one after another, including some high dams and large reservoirs. The pressure has reached the level of 10,000 tons or more. The arc gate is a good high-head discharge gate type, but when it encounters a large orifice, the traditional two-frame double-hinge structure ...

AI Technical Summary

Problems solved by technology

The arc-shaped gate of a vent hole in the middle layer of a hydropower project in the upper reaches of the Lancang River in Tibet has a water retaining area of ​​160m 2 , a design head of 150m, and a total water pressure of 25,000t, far exceeding the current highest level in the world. There are major problems in structural type design: The thickness of the gate steel plate is too thick, the manufacturing and welding process is too difficult, and the transportation and installation are basically impossible ; The single hinge of the gate can withstand a pressure of 12500t, and it is too difficult to cast the hinge and reinforce the civil engineering; The self-weight of the gate is too heavy. The conventional single-cylinder swing hydraulic cylinder has a capacity of 20,000kN, which is far beyond the current world's highest level of 7,500kN. Manufacturing and installation are basically impossible.

Images