Taking-out device for outer ring of externally-braced valve stem packing leakage extraction ring and installation method thereof

Abstract

The invention provides a taking-out device for an outer ring of an externally-braced valve stem packing leakage extraction ring and an installation method thereof. The taking-out device comprises a conical elastic claw (1), a conical sleeve (2) and a fuller (4), wherein the middle of the conical sleeve (2) is connected to the upper part of the conical elastic claw (1) through threads and matched with the lower part of the conical elastic claw (1) through the conical surface. The installation method of the taking-out device comprises the steps that the conical elastic claw (1), the conical sleeve (2) and the fuller (4) are sequentially installed, the outer ring (6) of the leakage extraction ring is taken out to be sawed off or pinched off from a packing cavity, and the device can be disassembled by loosening fastening screws. The taking-out device and the installation method thereof have the advantages that the outer ring of the leakage extraction ring can be taken out conveniently, quickly and reliably on the condition that the packing cavity is narrow, one-line assembly and disassembly can be achieved without influencing equipment operation, operation is convenient, the structure is simple and clamping is firm.

Description

technical field [0001] The invention belongs to the technical field of electric gate valves for nuclear power plants, and in particular relates to an outer ring take-out device and an installation method for an outer support type valve stem packing leak-inducing ring. Background technique [0002] At present, the electric gate valves of nuclear power plants have the following hidden dangers or failures: the packing leakage ring is slightly deformed, and graphite filler debris is easily embedded in the gap between the outer wall of the leakage ring and the inner wall of the packing chamber, which cannot be cleaned, resulting in the leakage of the packing leakage ring and the packing chamber. The wall is swelled and jammed, and the packing leakage ring cannot be taken out from the packing chamber. When the packing drain ring is divided into inner ring and outer ring by EDM process, as figure 1 As shown, it is necessary to use a special tool to remove the two parts of the pack...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that it is difficult to take out the outer ring after the leakage ring of the valve stem packing is divided into an inner ring and an outer ring, and to provide an outer support device for taking out the outer ring of the leakage ring of the valve stem packing and its installation. method

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