A Huff connector for the high and medium pressure main valve of a steam turbine
A connecting piece and main valve technology, applied in mechanical equipment, fixtures, etc., can solve the problems of weak connection, low reliability, inability to overcome steam force, etc., and achieve convenient operation, stability and safety for emergency recovery. high effect
Active Publication Date: 2019-09-24
国能宁夏灵武发电有限公司
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Problems solved by technology
[0006] Analyzing and summarizing the above two schemes, scheme one cannot overcome the steam force only by temporary bolts, while scheme two can move the steam valve after connection, but the connection method is relatively weak and the reliability is extremely low due to the presence of oxidized skin jams, and after implementation Due to the need to use temporary bolts for replacement, the safety risk in the operation is relatively high. Even after the valve is completely closed, the temporary bolts still need to be removed to restore the normal connection of the valve to ensure that it can be fully opened and fully closed, which is extremely difficult to implement
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Embodiment 1
[0031] Such as Figure 1-3 As shown, this embodiment makes a detailed description of the structure and working principle of the Huff connector of a high and medium pressure main steam valve of the present invention. Take the example of a four-cylinder exhaust steam and direct air-cooled steam turbine.
[0032] Such as figure 1 As shown, this embodiment provides a Hough connector for high and medium pressure main valves. The upper part of the Huff connector 1 in this embodiment is equipped with a valve stem, and the lower part is embedded with a boss flange 2. The boss method The blue plate 2 and the piston rod 5 of the oil motor are connected by hexagon socket bolts, and the oil motor is connected with the spring sleeve, which is a new connection method in this embodiment.
[0033] Huff connector 1 is a newly designed connector in its own embodiment, replacing the traditional long bolt integral connection, the flange is also a newly designed boss flange 2, and the design of ...
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The invention discloses a Haff connecting piece for a turbine high-medium pressure main throttle valve. The Haff connecting piece is a sectional Haff connecting piece. An inner cavity of the Haff connecting piece comprises an upper cavity body and a lower cavity body which are arranged in the form of step holes. The upper cavity body is used for inner embedding of a protruding shoulder of a valve rod, the lower cavity body is used for inner embedding of a flange plate, and the flange plate is used for being fixedly connected with a piston rod. The two cavity bodies of the Haff connecting piece are arranged to be the inner embedding type cavities and are used for being fixedly connected with the valve rod and the flange plate correspondingly. The flange plate integrally connects the piston rod of a hydraulic servo motor with a spring sleeve through an inner hexagon bolt, and the fracture situation caused by bolt connection purely adopted in the prior art can be avoided.
Description
technical field [0001] The invention relates to the technical field of steam turbine equipment, in particular to a Huff connector for high and medium pressure main steam valves. Background technique [0002] The main steam valve of the steam turbine is an important steam distribution mechanism of the steam turbine generator set. Its main function is to quickly cut off the steam flow to the steam turbine in an emergency to ensure the safety of the steam turbine. According to the equipment structure, it is divided into high-pressure main steam valve and medium-pressure main steam valve. The high-pressure main steam valve mainly controls the circulation and isolation of the main steam entering the high-pressure cylinder, and the medium-pressure main steam valve controls the circulation and isolation of the reheat steam entering the medium-pressure cylinder. Has a crisis blocking function. [0003] During the normal inspection and test, the staff found on the spot that the medi...
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IPC IPC(8): F16B1/02
Inventor 沈亭尚宪猛朱建华刘韩星
Owner 国能宁夏灵武发电有限公司