A positioning device for a manhole cover plate of a voltage stabilizer of a nuclear power unit

Abstract

The invention belongs to the technical field of voltage stabilizers of a nuclear power unit, and particularly relates to a voltage stabilizer manhole cover plate locating device of the nuclear power unit. The invention aims to develop the voltage stabilizer manhole cover plate locating device of the nuclear power unit; the voltage stabilizer manhole cover plate locating device can be used for realizing fine tuning on a position of a manhole cover plate, a bolt hole in the manhole cover plate can be quickly and accurately adjusted to the central position of a bolt bottom hole, and the manhole cover plate of a voltage stabilizer and a sealing gasket are enabled not to be in dislocation, so that good sealing performance is realized. The voltage stabilizer manhole cover plate locating device is characterized by comprising an upper hoop plate assembly and a lower hoop plate assembly, wherein the upper hoop plate assembly and the lower hoop plate assembly are fixedly connected, and are arranged on a manhole base of the voltage stabilizer. The voltage stabilizer manhole cover plate locating device of the nuclear power unit, disclosed by the invention, has the advantages that the structure is simple, safe and reliable, the tool operation is simple, centering work of the manhole cover plate of the voltage stabilizer can be accurately and quickly finished, the working time is shortened by a big margin, and dosage received by a worker under a radiation environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of nuclear power unit voltage stabilizers, and in particular relates to a manhole cover positioning device for a nuclear power unit voltage stabilizer. Background technique [0002] There is an angle of 45 degrees between the center line of the manhole of the voltage stabilizer and the hoisting direction of the cover plate of the two million units in Fangjiashan. The diameter of the manhole cover plate of the voltage stabilizer is 686mm and the thickness is 130mm. M48×4 bolts are connected to the main body of the voltage stabilizer, and the weight of the cover plate is about 370Kg. [0003] Due to the high radiation dose, the position of the manhole of the voltage stabilizer is not suitable for the staff to stay for a long time, especially for the maintenance of the manhole of the voltage stabilizer, it is necessary to open and reinstall the manhole cover; secondly, the center line of the cover and the stabi...

AI Technical Summary

Problems solved by technology

[0003] Due to the high radiation dose, the position of the manhole of the voltage stabilizer is not suitable for the staff to stay for a long time, especially for the maintenance of the manhole of the voltage stabilizer, it is necessary to open and reinstall the manhole cover; secondly, the center line of the cover and the stabilizer The position of the compressor body is installed at an angle of 45°, and the weight of the cover itself makes opening and reinstalling the cover a certain risk for maintenance personnel; moreover, when installing the manhole cover of the voltage stabilizer, the manhole The centering of the cover plate is a very important step. Once the manhole cover plate is slightly misaligned, it will cause certain interference and misalignment to the pressing bolts and sealing gaskets of the cover plate of the voltage stabilizer, which will affect its sealing performance.

If the regulator cover is not fitted correctly, there may be a significant risk of media leakage on the primary side

[0004] According to previous experience, when installing the manhole cover plate of the voltage stabilizer, use a crowbar to center the cover plate during the centering process. This method has low centering precision, slow speed, and is easy to damage the thread of the bottom hole of the voltage stabilizer bolt.

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