Drum-shaped filter screen support structure in nuclear power plant

Abstract

The invention discloses a drum-shaped filter screen support structure in a nuclear power plant. The structure comprises a spindle, a spindle bearing seat, a bearing seat base plate, a drum-shaped filter screen protection device, a hub and spokes, wherein the spindle is mounted in the spindle bearing seat; the hub is mounted on the spindle; the spokes are connected with the hub; the drum-shaped filter screen protection device comprises a protection pressing block and a protection pull rod; the bearing seat base plate is fixed on a concrete floor plate; the spindle bearing seat is connected below the protection pressing block; and the protection pressing block is connected with the bearing seat base plate through the protection pull rod. Before being damaged, a drum-shaped filter screen canbe pulled off through a pull-off load of the protection pull rod, and thus security of the drum-shaped filter screen can be ensured. As the drum-shaped filter screen protection device is arranged on the spindle bearing seat of the structure, the drum-shaped filter screen can be pulled off by the protection pull rod in case of large buoyancy, and a protection function on the drum-shaped filter screen can be achieved. The hub is of a forged piece structure, and the spokes are of H-shaped steel structures.

Description

technical field [0001] The invention belongs to the field of nuclear power plant circulating water filtration, more specifically, the invention relates to a support structure of a drum-shaped filter screen used for filtering seawater in a nuclear power plant circulating water filtering system. Background technique [0002] Drum-shaped filter (also known as drum screen) is the last large-scale filter device in the "defense in depth" system of nuclear power cold source to resist marine organisms. Its performance directly affects the safety of nuclear power cold source and the safe and stable operation of the unit. [0003] When the "outside in and inside out" type drum net is running, the water enters from the outside of the net and flows out from the inside of the net, so that marine organisms and other garbage are intercepted outside the drum net. Because the water level outside the drum net is higher than the water level inside the drum net, the drum net is affected by buoy...

AI Technical Summary

Problems solved by technology

At present, the wheel hubs designed and manufactured in China are cast structures. In order to improve the strength of the hubs, a large number of reinforcing ribs are cast on the hubs. The structure is complex, and the precision of the cast hubs is not high. Casting cracks will inevitably occur, which will affect the performance and service life of the hubs.

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