Water inlet and outlet cylindrical fixed trash rack

Abstract

The invention discloses a water inlet and outlet cylindrical fixed trash rack. The water inlet and outlet cylindrical fixed trash rack comprises embedded steel plates embedded in water inlet and outlet; the embedded steel plates are welded with lifting plates uniformly distributed at the peripheries; the lifting plates are provided with a set of bolt holes uniformly distributed; the lifting platesare connected with outer pull plates on the trash rack by bolts; the trash rack is cylindrical, and comprises an outer cylinder and a center body; the outer cylinder and the center body are connectedby a set of radial grid plates; and the radial grid plates are connected by a set of arc grid plates with different radians to form a set of concentric round grid plates. The trash rack is free of the grid groove influence in two-way flow passing and better in water flowing state; center flow passing cast bodies and the water inlet and outer sides of the grid plates are of round head structures,so that the damping is lower, the influence on the grid plates when water currents pass through the trash rack is reduced, and the vibration of the grid plates is lower; and main parts of the trash rack are connected by adopting the bolts, so that the vibration resistance is excellent, and the service life of the trash rack is effectively prolonged.

Description

technical field [0001] The invention relates to a cylindrical fixed trash rack at a water inlet and outlet, and belongs to the technical field of metal structures of water conservancy and hydropower projects. Background technique [0002] For the trash rack at the inlet and outlet of the pumped storage power station, trash rack slots are generally set up traditionally, and the trash rack is fixed on the grid slot by sliders or wedges; in addition, the trash rack adopts a frame structure, and its frame beams and vertical The beam has an I-shaped cross-section, and the damping is relatively large. Due to the two-way flow of the trash rack and the high flow velocity, due to the grid groove, the flow path of the inlet and outlet has a local mutation, so the flow state of the water flow at the inlet and outlet when it passes through the trash rack is much more complicated. Change, it is easy to induce the vibration of the grid, which will lead to the damage of the grid, so the ex...

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Problems solved by technology

[0002] For the trash rack at the inlet and outlet of the pumped storage power station, trash rack slots are generally provided traditionally, and the trash rack is fixed on the grid slot by sliders or wedges; in addition, the trash rack adopts a frame structure, and its frame beams and vertical The beam is an I-shaped cross-section with large damping. Due to the two-way flow of the trash rack and the high flow velocity, due to the grid groove, the flow channel of the inlet and outlet has a local mutation, so the flow state of the water flow at the inlet and outlet when it passes through the trash rack is much more complicated. change, it is easy to induce grid vibration and cause grid damage, so the existing technology is still not perfect and needs to be further improved

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