a maintenance channel

Abstract

The invention discloses an inspection gallery, characterized by comprising a ladder stand and a plurality of inspection platforms which are parallelly distributed up and down, and are provided with windows, and a slidable cover plate used for covering the windows, wherein adjacent inspection platforms are in connection through the ladder stand. The beneficial effects are as follows: (1) a converter valve tower is internally provided with the inspection gallery, thereby facilitating later repair and maintenance; (2)maintenance and operation personnel utilize the ladder stand and the windows on the inspection platforms to move among different valve layers to complete all operations in the converter valve tower, need not face the high altitude, have no fear, and are safer; and (3) the ladder stand is carried with the personnel, is directly brought down from the valve tower after inspection, and can neither influence interlayer insulation of the valve tower nor increase the long-term weight of the valve tower in operation.

Description

technical field [0001] The invention relates to a maintenance channel, which belongs to the technical field of electric equipment. Background technique [0002] The valve tower of the converter valve is a component of the high-voltage and large-capacity DC converter, and it is a large-scale power equipment. A single valve tower is a double valve or quadruple valve, which usually consists of multiple valve layers stacked up and down, as well as top and bottom shields. Due to the high height and voltage level of the valve tower, the valve tower is currently suspended in the valve hall by means of suspension. The bottom of the valve tower has a large ground clearance, and the distance between the valve layers inside the valve tower is also large. Therefore, the convenience and safety of later maintenance should be fully considered when designing the valve tower of the converter valve. [0003] At present, there are two main ways to maintain and repair the valve tower of the c...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two maintenance methods for the valve tower of the converter valve. One is that there is no maintenance channel inside the valve tower, and the operation and maintenance personnel are lifted to the parts of the valve tower that need to be repaired by using a lift truck. The maintenance of the equipment on the vehicle and the internal equipment of the valve tower needs the operation and maintenance personnel to transfer from the lift car to the valve tower to complete. Since there is no dedicated maintenance channel, the operation and maintenance personnel do not have a good foothold in the valve tower. Maintenance also needs to be transferred back and forth between the lift car and the valve tower, which is not only inconvenient for maintenance, but also cannot guarantee safety; An insulating ladder is fixedly installed on the side of the valve tower. The insulating ladder is installed on the metal busbar at the edge of the valve tower. The maintenance personnel can pass through the window at the end of the inspection channel through the insulating ladder to move between the upper and lower valve layer maintenance channels. It greatly improves the convenience of the operation and maintenance personnel, but the insulating ladder is fixedly installed on the valve tower. When designing the valve tower, it is necessary to fully consider the electrical interference of the ladder to the valve tower, for example, it will shorten the climbing between the upper and lower valve floors. Electrical distance; the ladder itself is not a necessary part for the operation of the converter valve, and it is fixedly installed on the valve tower, which will increase the long-term load of the valve tower during operation; in addition, in order not to affect the maintenance personnel working on the maintenance platform, and to facilitate fixing , the maintenance ladders are all fixed on the interlayer metal busbars at the edge of the valve tower, which will cause the operation and maintenance personnel to face the high altitude directly when moving on the ladders.

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