Leak detector of vacuum system

Abstract

The invention belongs to the technical field of leak detection for pipelines of vacuum systems and particularly relates to a leak detector of a vacuum system. The leak detector comprises a detection part, a connection part and a sensing device, wherein the connecting part is provided with a hollow pipe, the detection part is provided with a detection hole, one end of the hollow pipe is connected with the detection hole of the detection part, an air runner is formed between the detection hole and the hollow pipe, and the sensing device is arranged at the other end of the hollow pipe. When the leak detector is used, a unit is unnecessary to decelerate and stop and can be used under a normal operation state, not only is time consumption prevented, but also losses caused by continuous top can be reduced, the cost can be saved, furthermore, the personal safety of workers can be guaranteed and leaks can be rapidly detected and handled as soon as possible.

Description

technical field [0001] The invention belongs to the technical field of vacuum system pipeline leak detection, in particular to a vacuum system leak detector. Background technique [0002] The vacuum system of the power plant is mainly a water ring mechanical vacuum pump, which establishes a certain vacuum in the cylinder and condenser during startup and continuously removes non-condensable gas in the vacuum system of the steam turbine during normal operation to maintain the vacuum of the condenser. Most of the vacuum leakage of the electric condenser occurs at the copper pipe and the flange. The copper pipe will burst or perforate due to long-term use and leak, while the flange will be leaked due to the insufficient tightness of the screw or the sealing ring. The leakage of the vacuum system will cause the machine to idle or the vacuum load to be insufficient, which will affect the normal operation. When the copper pipe flange of the electric condenser leaks, the traditiona...

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Problems solved by technology

[0003] Chinese patent document CN101876581A discloses a leak point finding method for copper tube leakage of power plant condenser, which is mainly used in the leak detection of copper tube. Content, electrical conductivity, hardness and other indicators to determine which side the leakage occurs. After investigating the leakage side, open the small doors at both ends of the half side, drain the water, and wrap the copper tube with plastic wrap on the side of the condenser. The nozzle is sealed, and the other side is checked with a candle flame one by one, because the leaked tube will have a vacuum leak, and without the interference of external wind, the flame will reach the leaked copper tube and will obviously go inward. offset

This method also needs to stop the unit and perform other operations to a certain extent before leak detection, which will still affect the normal operation of the unit, and the time-consuming problem still cannot be effectively solved

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