Steam supplementing valve for turbine

Abstract

The invention relates to a gulp valve, in particular to a steam supplementing valve for a turbine, and aims at solving the problems that an existing gulp valve generates unstable vibration under the small opening degree, cannot control steam flow and generates very large noise. The steam supplementing valve comprises a valve shell, a valve seat, a hole type valve butterfly, a valve deck and a steam supplementing adjusting valve butterfly, wherein the valve seat, the hole type valve butterfly, the valve deck and the steam supplementing adjusting valve butterfly are located in the valve shell. The valve seat, the hole type valve butterfly and the valve deck are all tubular, and one end of the valve seat, one end of the hole type valve butterfly and one end of the valve deck are sequentiallyand coaxially communicated. A plurality of flow control holes are formed in the side wall of the hole type valve butterfly and are all communicated with a valve cavity; the steam supplementing adjusting valve butterfly can move in the axial direction of the hole type valve butterfly and the valve deck when rotating; when the steam supplementing adjusting valve butterfly is located at the side deadpoint of the valve seat, the other end of the valve seat and all the flow control holes are sealed through the steam supplementing adjusting valve butterfly; when the steam supplementing adjusting valve butterfly moves towards the side of the valve deck, the steam supplementing adjusting valve butterfly is gradually exposed out of the flow control holes; and when the steam supplementing adjustingvalve butterfly is located at the side dead point of the valve deck, all the flow control holes are exposed.

Description

technical field [0001] The invention relates to an air supplement valve, in particular to a steam supplement valve with a hole-type valve butterfly which has the function of silencing sound and can precisely control the flow of steam. Background technique [0002] The existing steam intake valve in use adopts a plunger structure design. Since the flow area of ​​the supplementary steam valve must have the ability to flow through the maximum flow of supplementary steam, the flow area of ​​the valve should be designed to be large enough. However, the steam turbine only needs a small supplementary steam flow during a frequency adjustment, and the supplementary gas valve often works at a small opening. Due to the large difference in steam pressure between the front and back of the steam supply valve, the steam flow rate at the joint between the steam supply valve butterfly and the valve seat is very high, so the supply valve produces unstable vibration at a small opening, and it...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a steam supply valve for steam turbines in order to overcome the problems of unstable vibration, inability to control steam flow and large noise generated by the existing air supply valve at a small opening

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