Three-blade type steam ball valve installing method

Abstract

The invention discloses a three-blade type steam ball valve installing method. A water inlet channel is designed on each valve deck, a cooling fluid is fed into each water inlet channel for decreasingtemperature in the corresponding valve deck, the cooling fluid which flows hastily can take away a large amount of heat in a ball valve, and then cooling and protecting effects on the ball valve areachieved. It is proved through multiple practice that the cooling effect is obvious, the installing method is an optimal installing mode for a three-blade type steam ball valve, and disassembling andassembling of the ball valve can be completed in a maximum-efficiency manner by means of the installing method. According to the three-blade type steam ball valve installing method, packing is arranged in a cavity of a valve neck, a gland cover is arranged on the packing, a hole is formed in the middle of the gland cover, a valve rod rightly penetrates out of the hole, the packing is rightly pressed with the lower end of the gland cover, and the portion, located above the gland cover, of the valve rod is sleeved with a closing combined butterfly spring; and the closing combined butterfly spring is arranged, when tiny leakage occurs at the position of the valve rod, the compensating effect can be achieved, pre-tightened deformation is released for pressing the packing again, and the sealingeffect is improved.

Description

technical field [0001] The invention relates to a method for installing a three-piece steam ball valve. Background technique [0002] At present, the design and manufacture of high-temperature valves at home and abroad, especially ball valves, mainly focus on the selection and application of temperature-resistant materials, and are always troubled by the problem of thermal expansion. When the temperature rises to a certain range, the temperature compensation space disappears. The structure of the traditional valve is asymmetrical, which leads to uneven thermal expansion of the valve and failure of the valve to lock. In response to this problem, the application number is 201320165193.7, and the invention name is a Chinese patent for a high-temperature ball valve. Two valve stems are symmetrically connected to the valve core of the ball valve. The valve stems are the same two, and an attempt is made to design a fully symmetrical structure. Ball valve, so that when the tempera...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for installing a three-piece steam ball valve to solve the technical problem of limited high temperature resistance of the existing ball valves

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