Device for disassembling and assembling upper fixing clamping block and lower fixing clamping block of explosion valve shearing cover

Abstract

The invention discloses a device for disassembling and assembling an upper fixing clamping block and a lower fixing clamping block of an explosion valve shearing cover, and belongs to the technical field of nuclear power station explosion valve overhauling. The device for disassembling and assembling the upper fixing clamping block and the lower fixing clamping block of the explosion valve shearing cover comprises an upper fixing clamping block disassembling and assembling device and a lower fixing clamping block disassembling and assembling device. The upper fixing clamping block disassembling and assembling device comprises a roller frame internally provided with a plurality of piping rollers, a lifting device arranged below the roller frame, and a sliding table arranged on the side, opposite to the rolling direction of the piping rollers, of the roller frame. The lower fixing clamping block disassembling and assembling device comprises an inverted-T-shaped supporting base, a trapezoidal lead screw arranged on one side of the inverted-T-shaped supporting base and a lifting plate arranged on the other side of the inverted-T-shaped supporting base. The lifting plate is connected with a lead screw nut on the trapezoidal lead screw through an opening of the inverted-T-shaped supporting base. The device is used for disassembling and assembling the upper clamping block and the lower clamping block of the explosion valve shearing cover under the condition of narrow maintenance space, the labor intensity of personnel can be greatly reduced, the working efficiency is improved, andthe irradiated dose of the personnel during working is reduced.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant blasting valve maintenance, and in particular relates to a device for disassembling and assembling the upper and lower fixing clips of the shear cover of the blasting valve. Background technique [0002] The blasting valve is a key equipment of nuclear level 1. Its main function is to effectively prevent and alleviate the occurrence of serious accidents in accident conditions and ensure the safe operation of nuclear power plants. When the unit is shut down for overhaul, it is necessary to dismantle the upper and lower clamping blocks of the shear cover of the 14-inch blasting valve, and reinstall the upper and lower clamping blocks after non-destructive testing of the shear cover. However, due to the narrow space for on-site maintenance, and the weight of the upper and lower clamping blocks weighs tens of kilograms, it is extremely inconvenient for personnel to operate. In addition, th...

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Problems solved by technology

But it is not suitable for most curved devices, cannot fix devices without hinged components and cannot be installed in the vertical direction

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