Installation layout structure of ventilation limit switch in gas turbine natural gas room

Abstract

The invention relates to a ventilation travel switch installing and arranging structure of a gas turbine natural gas chamber. The ventilation travel switch installing and arranging structure comprises a natural gas chamber draught fan, an air flue pipe, a travel switch and an outlet baffle connecting lever. The air flue pipe is connected with the natural gas chamber draught fan, an air flue is formed in the air flue pipe, and the air flue pipe is provided with a travel switch installing position which is located on the lifting path of the outlet baffle connecting lever. The travel switch is provided with a normally-open node, a normally-close node and an action connecting lever. The ventilation travel switch installing and arranging structure is characterized in that the travel switch installing position is arranged on the lower portion of the air flue pipe, and the travel switch is located on the lower portion of the air flue pipe and on the travel switch installing position. The two ends of the normally-close node are connected with wires. The outlet baffle connecting lever is matched with the action connecting lever. The ventilation travel switch installing and arranging structure is reasonable in structural design, reliable in performance, easy to operate, convenient to use, practical and low in cost.

Description

technical field [0001] The invention relates to an installation arrangement structure of a ventilation travel switch between a gas turbine and a natural gas room. Background technique [0002] Gas turbines are currently recognized as environmentally friendly and efficient generating units around the world. In recent years, my country has introduced a large number of gas turbine combined cycle units similar to 9E gas turbines with natural gas inter-gas fans. [0003] The purpose of the complete set of fan equipment in the gas turbine natural gas room is to ventilate and prevent the explosion caused by the accumulation of natural gas. At present, the external ventilation travel switches of the gas turbine units with gas turbine natural gas room fans are all used in such as figure 2 The upper travel switch installation position 9 in the middle is installed, and the travel switch adopts the installation layout method of wiring at both ends of the normally open node. The origin...

AI Technical Summary

Problems solved by technology

[0004] 1. In the case of a certain fan output, it is not enough to overcome the downward gravity of the outlet baffle to make the crank arm fully rise to the height of the top of the air duct, so that the travel switch installed on the upper part of the crank arm cannot operate normally.

[0005] 2. The instantaneous start-up of other high-power power-consuming auxiliary engines of the gas turbine may temporarily weaken the output of the ventilation fan in the natural gas room, causing the lifting height of the crank arm to drop for a short time and causing the travel switch to change to an abnormal state

[0006] 3. Slight air leakage at the joint of the ventilation pipe, increased frictional force after rust on the connecting shaft of the crank arm of the outlet baffle, and opening of the inlet door of the natural gas room may cause the travel switch to change to an abnormal state

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