CN-121719974-B - Bypass valve device for steam turbine system

CN121719974BCN 121719974 BCN121719974 BCN 121719974BCN-121719974-B

Abstract

The invention discloses a bypass valve device for a steam turbine system, which relates to the field of bypass valves and comprises a bypass valve body, wherein a valve inlet pipe and two water spraying pipes are connected to the bypass valve body, a plurality of water spraying heads are connected to the water spraying pipes, the water spraying heads are arranged on the bypass valve body, a water inlet pipe is connected to the two water spraying pipes, and an uninterrupted transfer box is arranged on the bypass valve body. In the invention, when steam is input into the bypass valve body, the steam is utilized to push the blades to rotate to realize preliminary deceleration, the multi-buffer push plate is designed to disperse impact load, the buffer push plate rotates to overcome elastic resistance, steam kinetic energy is further consumed to realize controllable deceleration, and further the bypass valve body can be fully protected, when the buffer push plate is damaged, the steam directly impacts the plate to trigger the transfer inner box to switch, so that the system is prevented from being invalid, and the problem of long-term use abrasion of a single-group nozzle is avoided by synchronously driving two groups of temperature reduction water spray heads to alternately work.

Inventors

Huang Xiaolinjie
XIA TAO
HUANG SHIHAO
DENG YILIN
LIAO YI

Assignees

亿川科技(成都)有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260225

Claims (9)

1. The bypass valve device for the steam turbine system is characterized by comprising a bypass valve body, wherein a valve inlet pipe and two water spraying pipes are connected to the bypass valve body, a plurality of water spraying heads are connected to the water spraying pipes, the water spraying heads are arranged on the bypass valve body, a water inlet pipe is connected to the two water spraying pipes, an uninterrupted transit box is arranged on the bypass valve body, and the valve inlet pipe is arranged on the uninterrupted transit box; The anti-rust buffer device comprises two transfer inner boxes, wherein the two transfer inner boxes are movably arranged in the uninterrupted transfer box, an impact rotating shaft is rotatably arranged in the transfer inner boxes, a plurality of buffer pushing plates are arranged on the impact rotating shaft, a buffer pushing groove is formed in the inner wall of the top side of the transfer inner box, a blocking pushing plate is slidably arranged in the buffer pushing groove, the blocking pushing plate is abutted against one buffer pushing plate, a buffer spring is arranged on the inner wall of the buffer pushing groove, and the buffer spring is arranged on the blocking pushing plate; The uninterrupted transfer box is internally provided with an uninterrupted switching device which is used for switching the buffering rust-proof device, the uninterrupted switching device comprises a switching locking rod which is movably arranged in the transfer inner box, the transfer inner box is internally and movably provided with a switching push plate, and the switching push plate is in transmission connection with the switching locking rod; the uninterrupted switching device further comprises a switching box, two switching sliding seats are slidably installed in the switching box, mounting cutting bars are installed on the two transfer inner boxes, and the transfer inner boxes are inserted into the switching sliding seats through the mounting cutting bars; The switching slide seat is provided with a switching spring, and the switching spring is arranged on the inner wall of the switching box.
2. The bypass valve device for a steam turbine system according to claim 1, wherein the buffering rust preventive device further comprises two air outlet funnels, and the two air outlet funnels are respectively installed on the two transit inner boxes; the filter plate is arranged in the transfer inner box and is positioned in the air outlet funnel.
3. The bypass valve device for a steam turbine system according to claim 2, wherein a switching air inlet box is installed on the intermediate inner box, and the switching air inlet box is communicated with the valve inlet pipe; the switching air outlet box is arranged on the air outlet funnel, the switching pipe is arranged at the bottom side of the uninterrupted transfer box, the switching pipe is arranged on the bypass valve body, and the switching air outlet box is communicated with the switching pipe.
4. The bypass valve device for a steam turbine system according to claim 1, wherein a limiting sleeve is installed on an inner wall of the intermediate inner box, a limiting push rod is installed on the switching push plate, and the limiting push rod is slidably installed in the limiting sleeve; and one end of the limiting push rod is provided with a push-back spring, and the push-back spring is arranged on the inner wall of the limiting sleeve.
5. The bypass valve device for a steam turbine system according to claim 4, wherein a driving push plate is installed on the switching push plate, and the switching lock lever is movably installed on the driving push plate; and a switching locking groove is formed in the inner wall of the top side of the uninterrupted transfer box, and the switching locking rod is inserted into the switching locking groove.
6. The bypass valve device for a steam turbine system according to claim 5, wherein the driving push plate is provided with a driving push hole, the switching lock rod is provided with a switching push shaft, and the switching push shaft is movably arranged in the driving push hole.
7. The bypass valve device for a steam turbine system according to claim 1, further comprising a nozzle switching device mounted on both of the water spray pipes, the water inlet pipe being mounted on the nozzle switching device, the nozzle switching device being for switching between the two water spray pipes; the spray head switching device comprises a switching water inlet tank, the switching water inlet tanks are arranged on two spray pipes, the water inlet pipe is arranged on the switching water inlet tank, a switching blocking frame is movably arranged in the switching water inlet tank, and the switching blocking frame is used for sealing the spray pipes.
8. The bypass valve device for a steam turbine system according to claim 7, wherein a switching push bar is movably installed at one side of the uninterrupted transfer case, a switching link is installed on the switching push bar, and the switching link is installed on the switching barrier frame; Two vertical pressing grooves are formed in the switching pushing strip, limiting frames are movably mounted in the two vertical pressing grooves, the limiting frames are mounted on the uninterrupted transfer box, vertical springs are mounted on the inner walls of the vertical pressing grooves, and the vertical springs are mounted on the limiting frames.
9. The bypass valve device for a steam turbine system according to claim 8, wherein an L-shaped switching plate is slidably mounted on the uninterrupted transfer case, an arc-shaped push bar is mounted on the L-shaped switching plate, and the L-shaped switching plate pushes the switching push bar to move vertically through the arc-shaped push bar; And the blocking push plate is provided with a transverse pushing rod, and the blocking push plate moves to push the L-shaped switching plate to move through the transverse pushing rod.

Description

Bypass valve device for steam turbine system Technical Field The invention relates to the technical field of bypass valves, in particular to a bypass valve device for a steam turbine system. Background The bypass valve is a key adjusting device in the turbine system and is used for directly guiding steam generated by the boiler into the reheater or the condenser by bypassing the turbine when the unit starts and stops or the load suddenly changes so as to balance the steam flow and protect equipment. When the high-pressure heater is in normal operation, the bypass channel of the inlet and outlet bypass valve is closed, the high-pressure heater channel is opened, and the feed water enters the boiler through the high-pressure heater. The bypass valve of the steam turbine runs under the working conditions of high temperature, high pressure, high-speed steam medium, frequent opening and closing and partial opening adjustment for a long time, a series of problems of structure and performance level can occur due to factors such as medium flushing, corrosion, alternating load, thermal fatigue and the like, the adjustment performance of the bypass valve is comprehensively deteriorated, if internal leakage leads to the incomplete closing of the valve, flushing deformation leads to the nonlinearity of flow characteristics, valve rod blocking leads to adjustment hysteresis, finally, the main steam pressure and reheat steam temperature of the start-stop stage of the steam turbine cannot be stably controlled, the safe start-stop and normal operation of a unit are influenced, in addition, the atomizing effect is reduced due to continuous flushing when a single nozzle is used for a long time, the atomizing angle and particle size of the temperature reduction water are directly damaged, the atomizing effect is deteriorated, a series of problems are caused, and the safe operation of the bypass system is finally threatened. Disclosure of Invention The present invention is directed to a bypass valve device for a steam turbine system, which solves the above-mentioned problems of the related art. In order to achieve the above purpose, the present invention provides the following technical solutions: The bypass valve device for the steam turbine system comprises a bypass valve body, wherein a valve inlet pipe and two water spraying pipes are connected to the bypass valve body, a plurality of water spraying heads are connected to the water spraying pipes, the water spraying heads are arranged on the bypass valve body, a water inlet pipe is connected to the two water spraying pipes, an uninterrupted transit box is arranged on the bypass valve body, and the valve inlet pipe is arranged on the uninterrupted transit box; The anti-rust buffer device comprises two transfer inner boxes, wherein the two transfer inner boxes are movably arranged in the uninterrupted transfer box, an impact rotating shaft is rotatably arranged in the transfer inner boxes, a plurality of buffer pushing plates are arranged on the impact rotating shaft, a buffer pushing groove is formed in the inner wall of the top side of the transfer inner box, a blocking pushing plate is slidably arranged in the buffer pushing groove, the blocking pushing plate is abutted against one buffer pushing plate, a buffer spring is arranged on the inner wall of the buffer pushing groove, and the buffer spring is arranged on the blocking pushing plate; The anti-rust buffer device comprises a buffer anti-rust device, and is characterized in that an uninterrupted switching device is arranged in an uninterrupted transfer box and used for switching the buffer anti-rust device, the uninterrupted switching device comprises a switching locking rod which is movably arranged in the transfer inner box, a switching push plate is movably arranged in the transfer inner box, and the switching push plate is in transmission connection with the switching locking rod. Further, in the preferred embodiment of the present invention, the buffering rust-proof device further includes two air outlet funnels, and the two air outlet funnels are respectively installed on the two transit inner boxes; the filter plate is arranged in the transfer inner box and is positioned in the air outlet funnel. Further, in the preferred embodiment of the present invention, a switching air inlet box is installed on the transit inner box, and the switching air inlet box is communicated with the valve air inlet pipe; the switching air outlet box is arranged on the air outlet funnel, the switching pipe is arranged at the bottom side of the uninterrupted transfer box, the switching pipe is arranged on the bypass valve body, and the switching air outlet box is communicated with the switching pipe. Further, in a preferred embodiment of the present invention, the uninterrupted switching device further includes a switching box, two switching sliding bases are slidably mounted in the switching box, mounting inserts are mounted on both