Horizontal high-pressure main stop valve disassembling and assembling tool

Abstract

The invention discloses a horizontal high-pressure main stop valve disassembling and assembling tool. The disassembling and assembling tool comprises a first hanging ring fixedly arranged at the top end of the side wall of a valve cover of a main stop valve, a balance hoisting structure which is used for balancing the overall weight of the main stop valve so as to guarantee that a main stop valvecore is in a horizontal state in the hoisting process and therefore facilitates dismounting of the main stop valve is arranged at the end, which is not provided with the main stop valve core, of the valve cover of the main stop valve, and the top end of the balance hoisting structure is provided with a second lifting ring which cooperates with the first lifting ring in hoisting on the main stop valve. The tool is manufactured according to the gravity center characteristics of the high-pressure main stop valve core of a large-scale steam turbine generator unit and the actual on-site space, so that the gravity center of the main stop valve core of a power plant series is balanced when the horizontal high-pressure main stop valve of the large-scale steam turbine generator unit is disassembledand assembled, the level of the main stop valve core is kept, so that the problem that due to the fact that a hoisting point and the gravity center of the main stop valve core is inconsistent, so that dismounting and mounting is difficult caused by alloy bolt hole skewing is solved.

Description

technical field [0001] The invention relates to the technical field of maintenance of large steam turbine generator sets, in particular to a disassembly tool for a horizontal high-pressure main steam valve. Background technique [0002] Large turbogenerator sets are generally equipped with two symmetrically arranged high-pressure main steam valves, which are the first valves for high-temperature and high-pressure steam to enter the steam turbine, and most of them are operated in a horizontal position. The main steam valve includes a main steam valve cover, a main steam valve core and a main steam valve stem connecting sleeve. The valve core of the main steam valve is connected with the valve body of the steam chamber by a plurality of alloy bolts, and the valve body of the steam chamber and the steam chamber are cast as one. The high-pressure main steam valve is the main component of the steam turbine protection system. All shutdown protection of the steam turbine is finall...

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a horizontal high-pressure main steam valve disassembly tool to solve the problem that the existing main steam valve core is easy to cause damage to the alloy bolts during disassembly and assembly, which will bring economic losses and time-consuming To reduce the difficulty of disassembly and assembly, balance the center of gravity of the main steam valve, make the disassembly and assembly of the high-pressure main steam valve more convenient, and ensure that the alloy bolts will not be damaged during the disassembly process

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