Double-floater oil tank for sealing oil of generator

Abstract

The generator sealing oil double-floater oil tank comprises a floater oil tank body, a floating ball valve and a bypass system, the top of the floater oil tank body is connected with an oil inlet main path, and the floating ball valve is arranged in the floater oil tank body and connected with the bypass system through an oil outlet main path. A floater oil tank oil inlet valve and an overflow isolation valve oil outlet valve are respectively arranged on the oil inlet main path and the oil outlet main path; a bypass oil outlet valve is arranged on the bypass system; the device further comprises an auxiliary oil drainage mechanism and a high-position alarm module, the auxiliary oil drainage mechanism comprises a floater oil valve and a floating ball support, the floater oil valve is arranged in the floater oil tank, the arrangement height of the floater oil valve is larger than that of the floating ball valve, an oil outlet pipeline of the floater oil valve is communicated with the oil outlet main path, and an oil outlet pipeline of the floating ball valve is communicated with the high-position alarm module. A floating ball of the floater oil valve is placed on the floating ball support and lifted through the floating ball support. When the oil level of the floater oil tank is higher than the height of a floating ball of the floater oil valve, the floater oil valve acts to assist in oil drainage and triggers the high-position alarm module to give an alarm.

Description

technical field [0001] The invention relates to the technical field of generator sealing, in particular to a generator sealing oil double-float oil tank. Background technique [0002] The generator seal oil float tank is an important part of the hydrogen seal system of the generator. The stability of its liquid level is of great significance to the safe operation of the generator. At present, the liquid level adjustment of the generator seal oil float tank generally depends on the mechanical float valve inside the tank. Automatically adjust the opening according to the buoyancy of the liquid level to keep the liquid level stable. For large generators, how to stably control the sealing oil system is a very important issue. If the control is improper, the generator and its auxiliary systems may be full of oil, which will cause fatal damage to the generator in operation. The stage float oil tank system is a simple system for the generator sealing oil system to maintain stable ...

AI Technical Summary

Problems solved by technology

For large generators, how to stably control the sealing oil system is a very important issue. If the control is improper, the generator and its auxiliary systems may be full of oil, which will cause fatal damage to the generator in operation. The stage float oil tank system is a simple system for the generator seal oil system to maintain stable oil filling. It can work well, but the reliability of this system gradually cannot meet the demand well with the increase of the value of the unit.

[0003] The generator seal oil system is very important for the generator hydrogen cooling unit, but it is also prone to abnormalities

In recent years, there have been many safety accidents in domestic power plants that the mechanical float valve of the generator sealing oil float tank is jammed, causing the generator to enter oil or a large amount of hydrogen gas leaks to cause the shutdown of the generator. Fires, explosions and other safety accidents are prone to occur, and there are large risks. Security risks

During the repair and commissioning process of No. 2 unit of our factory in recent years, the generator was fed with oil. After checking, the connecting rod of the float valve in the float oil tank of the sealing oil system was disengaged, and the float valve failed to close and could not be opened, causing the generator to enter oil.

In recent years, similar incidents have occurred during the commissioning of No. 1 unit. Power generation and oil intake delayed the recovery time of the unit and brought a lot of incidental work. On the other hand, it brought great hidden dangers to the normal operation of the unit.

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