High anti-seismic perforated tray for nuclear power plant nuclear island

Abstract

The invention belongs to mechanical devices bearing aerial cables of a nuclear power plant nuclear island area, and particularly relates to a nuclear power station nuclear island high anti-seismic belt tray with holes. The nuclear power station nuclear island high anti-seismic belt hole tray structurally comprises two ladder sides and a baseboard which are manufactured through stamping of a whole sheet material, through ribs extending in the vertical direction are respectively arranged on the two sides of the baseboard, a plurality of annular reinforcing ribs are sequentially arranged on the baseboard in the longitudinal direction, and a plurality of installing holes are formed in the baseboard. Each ladder side is of an I-shaped structure, the two horizontal ends of the upper portion of each ladder side are in an arc shape, and the middle of the upper portion of each ladder side is of a linear section structure; the lower portion of each ladder side is connected with the baseboard through an inverted-U-shaped arc structure. According to the nuclear power station nuclear island high anti-seismic belt hole tray, welding processing is not needed, environmental pollution caused by welding technique is avoided, anti-corrosion capability of a product is improved, and influence to stress of a bridge sheet material is reduced; meanwhile, due to the fact that the annular reinforcing ribs and the vertical through ribs are arranged on the baseboard, integrated bearing capacity and the bending-resisting performance in the downward direction of the bridge are greatly improved, and the nuclear power plant nuclear island high anti-seismic belt hole tray can meet the requirement of bearing cables in the situation that the thickness of a bridge profile is not increased.

Description

technical field [0001] The invention belongs to a mechanical device for carrying overhead cables in the nuclear island area of ​​a nuclear power plant, and in particular relates to a high anti-seismic tray with holes for the nuclear island of a nuclear power plant. Background technique [0002] The cable tray system is an important product in the manufacturing industry, and it is the main equipment used to standardize and protect the safety of cables and transmission lines in various infrastructure projects. The structural design of the ladder side and bottom plate of the perforated pallet directly determines the overall performance of the bridge (including bearing capacity, shock resistance, service life, appearance, etc.). [0003] At present, the traditional old-fashioned perforated pallet structure is composed of two ladder sides and a bottom plate. The commonly used fixing methods between the two ladder sides and the bottom plate are riveting, plugging or welding. Due t...

AI Technical Summary

Problems solved by technology

[0005] 1) The solder joints between the ladder edge and the bottom plate lead to a decrease in the overall bearing capacity of the bridge frame and poor stability. Only by increasing the thickness of the bridge plate to improve its bearing capacity and stability

This method not only seriously wastes steel resources and does not meet the national requirements for energy saving and consumption reduction, but also increases the self-weight of the bridge due to the increase in the thickness of the plate material, and at the same time increases the self-weight of the supporting environment, which affects the seismic level of the bridge system

[0006] 2) The welding process of the bridge will release a large amount of CO during the welding of the bridge 2 and other harmful gases, causing certain pollution to the environment. At the same time, due to the existence of the welding process, there will inevitably be local acid backlash after galvanizing, resulting in a decline in the anti-corrosion level of the welding point and reducing its service life.

[0007] 3) When laying cables, there is a danger of scratching the cables at the solder joints between the bottom plate and the edge of the ladder, which is not conducive to the on-site cable laying construction

[0008] 4) The bottom plate and the edge of the ladder are welded manually, its overall appearance is restricted by human factors, the processing efficiency is not high, and its overall performance and safety performance is not high. When the bridge frame is in a vibrating workshop or encounters foreign objects or earthquake disasters, It is easy to twist and break from the solder joints, the safety performance is not high, and the shock resistance performance is low

The bottom plate must be welded to a part of the right-angle side under the ladder side, which increases the cost of the bridge to a certain extent

[0009] 5) The elongation rate of the bottom plate is restricted by uncontrollable factors such as material tolerances, so the beading after punching may cause deformation of the bottom plate, etc.

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