Main feed water bypass regulating valve

Abstract

The invention discloses a main water supply bypass regulating valve. The main water supply bypass regulating valve comprises a valve body, a valve deck, a valve base, a valve element, a valve cage, a valve rod and an execution mechanism. The valve body is provided with an inlet channel, an outlet channel and a transfer channel. The valve element is arranged in the transfer channel. The valve element is sleeved with the valve cage. The valve cage is arranged at the intersecting position between the transfer channel and the inlet channel in a sealing and covering mode. Water seepage holes of the valve cage are formed in the wall, intersecting with the inlet channel, of the valve cage. The valve rod penetrates through the valve deck. The execution mechanism is installed on the valve deck. The first end of the valve rod is connected with the execution mechanism. The second end of the valve rod is connected with the valve element. A pressing ring is arranged on the position, connected with the valve rod, of the valve element in an overlapping mode. The valve element, the pressing ring and the valve rod are connected through fasteners. The opposite positions of the valve element and the pressing ring are fixed and located through fixing and locating parts. Through multiple and multipoint connecting and fastening, the connection stability of the main water supply bypass regulating valve is improved, and the service life of the main water supply bypass regulating valve is prolonged.

Description

technical field [0001] The invention relates to the field of adjustment equipment for a boiler feed water system, in particular to a main feed water bypass adjustment valve. Background technique [0002] The main feed water bypass regulating valve is used in the main feed water bypass system pipeline of the thermal power generating set, and plays the role of protecting the unit by feeding water such as boiler start-up and accidents. It is a valve that meets special adjustment requirements and protects the safety of operation. role. Due to the poor connection stability of the existing main feedwater bypass regulating valve, frequent adjustment or occasional adjustment will cause the connection between the valve stem and the valve core to fail, resulting in failure or even failure to adjust the adjustment, making the adjustment of the main feedwater bypass The valve often needs to be disassembled for maintenance or replacement, which increases the number of repairs and increa...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a main feedwater bypass regulating valve to solve the technical problem that the existing main feedwater bypass regulating valve has poor connection stability, which makes the connection between the valve stem and the valve core prone to failure.

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