Convex bulkhead gate groove
A flat gate and gate slot technology, which is applied in water conservancy projects, marine engineering, coastline protection, etc., can solve problems affecting the safe operation of projects, and achieve the effect of suppressing vortex-type cavitation, simple construction and weakening vortex-type cavitation.
Inactive Publication Date: 2009-05-13
HOHAI UNIV
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Problems solved by technology
However, when the high-speed water flow passes through the gate slot of the flat gate, due to the sudden change of the boundary of the water flow at the gate slot and the diffusion of the water flow, a vortex is formed in the gate slot and separated from the downstream water flow, so that the inside of the gate slot and the nearby side wall or bottom plate Cavitation cavitation occurs, which directly affects the safe operation of the project
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[0036] refer to Figure 22 , a convex plate gate groove, including a groove 1, inside the groove, a convex body 2 is arranged on the side wall parallel to the main flow direction of the water flow, the convex body protrudes from the inside of the rectangular groove, and the vertical dimension is large For cylindrical convex bodies with dimensions in the other two directions, the horizontal cross-sectional area of the convex body can remain unchanged along the vertical direction, and the horizontal cross-sectional area of the convex body can also change along the vertical direction. The horizontal section of the convex body is trapezoidal, rectangular, triangular or polygonal. The boundary line between the horizontal section of the convex body and the water flow is a circular arc, a parabola, an elliptic curve, a normal distribution curve, a curve formed by a combination of a parabola and a circular arc, a curve formed by a combination of an elliptical line and a circular a...
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The invention discloses a convex gate slot of plate gate, comprising flute and convex body on the side wall that is parallel with the main flow direction of water flow. Compared with prior technology, the invention is provided with following merits that (1) the construction is simple; (2) whirlpool cavitation in the gate slot is improved so as to decrease incipient cavitation number to gate slot of plate gate and improve the cavitation of gate slot. In hydraulic and hydroelectric engineering, the gate is the main composing part in emptying and diversion structure and it is vital for safe operation of project directly. The validity of invention has been validated by tests and the structure is simple and easy. Incipient cavitation number to gate slot of plate gate can be decreased efficiently and the cavitation of gate slot is improved. The safety of gate operation is improved.
Description
technical field [0001] The invention relates to a convex flat gate groove, which is mainly used for preventing and alleviating cavitation damage of flat gate grooves in drainage structures of water conservancy and hydropower projects. technical background [0002] In discharge structures, slab gate is a common type of gate, which has the advantages of simple structure, compact layout, good stress conditions for gate pier, convenient construction and maintenance, etc. , Spill tunnels and deep holes in dams are widely used. However, when the high-speed water flow passes through the gate slot of the flat gate, due to the sudden change of the boundary of the water flow at the gate slot and the diffusion of the water flow, a vortex is formed in the gate slot and separated from the downstream water flow, so that the inside of the gate slot and the nearby side wall or bottom plate The occurrence of cavitation cavitation will directly affect the safe operation of the project. [0...
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IPC IPC(8): E02B7/20E02B8/06
Inventor 吴建华吴伟伟阮仕平宋昉张兴李超洋
Owner HOHAI UNIV