High-temperature high-pressure steam split-ranging valve control device

Abstract

The invention discloses a high-temperature high-pressure steam split-ranging valve control device. The device comprises a valve beam, wherein a plurality of valve discs are connected to the valve beam through valve disc bolts; the valve discs are matched with valve seats; the valve beam is provided with stepped holes through which the valve disc bolts pass; bushings are arranged in the stepped holes; the valve disc bolts pass through the valve beam and the bushings; the upper ends of the valve disc bolts can be limited with the bushings; the lower ends of the valve disc bolts are in fixed threaded connection with the valve discs; the upper ends of the valve disc bolts do not exceed the top surface of the valve beam; and left and right ends of the valve beam have smooth transition structures. Through the technical scheme, the device has a simple structure, high damage resistance and low jitter, and the valve disc bolts are subjected to low and uniform load.

Description

technical field [0001] The invention relates to a steam turbine regulating steam valve opening device, in particular to a high-temperature and high-pressure steam split-range valve control device suitable for controlling the flow rate of high-temperature and high-pressure steam. Background technique [0002] In the commonly used regulating steam valve, the valve disc bolts are long and thin, and the bolt heads are exposed on the valve beam, and the two ends of the valve beam are open. In the complex and harsh steam flow environment of the steam inlet chamber, these unfavorable factors not only increase the The force also intensifies the vibration of the regulating valve, which brings high-frequency impact to the valve disc bolts. For a long time, the head of the valve disc bolt and the part in contact with the valve disc will be severely worn and broken, resulting in failure and shutdown of the steam turbine. Contents of the invention [0003] The object of the present in...

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Problems solved by technology

[0002] In the commonly used regulating steam valve, the valve disc bolts are long and thin, and the bolt heads are exposed on the valve beam, and the two ends of the valve beam are open. In the complex and harsh steam flow environment of the steam inlet chamber, these unfavorable factors not only increase the The force also intensifies the vibration of the regulating valve, which brings high-frequency impact to the valve disc bolts

For a long time, the head of the valve disc bolt and the part in contact with the valve disc will be severely worn and broken, resulting in turbine failure and shutdown

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