Guide vane water leakage detection system

Abstract

The application discloses a guide vane water leakage detection system, comprising a distance sensor, a central controller and a liquid level detection device, wherein the liquid level detection devicecomprises a liquid level meter, a through pipe and a first bracket; the distance sensor and the liquid level meter are electrically connected to the central controller, respectively; the first bracket is arranged in the through pipe, the liquid level meter is arranged on the first bracket, and the arrangement direction of the liquid level meter is parallel to the axis direction of the through pipe; the liquid level meter is configured to detect the liquid level height at a vent hole, and the distance sensor is configured to detect whether a water inlet gate is located at the bottom of a waterinlet, and when the water inlet gate is located at the bottom of the water inlet, the distance sensor sends the information to the central controller, the central controller starts to record the liquid level height measured by the liquid level meter, and the central controller determines whether a guide vane has water leakage according to the liquid level change; when the liquid level measured atthe vent hole drops, the central controller determines that water leakage occurs. Thereby, the detection of the sealing effect of the guide vane can be achieved.

Description

Technical field [0001] The present invention generally relates to the monitoring technology of hydraulic turbine units in hydropower plants, and specifically relates to a guide vane leakage detection system. Background technique [0002] The guide vane is one of the most important castings and forgings in the water guide mechanism of a hydro-generator unit. The guide vane has the same function as the volute and is mostly used in segmented multi-stage pumps. In a multi-stage centrifugal pump, the guide vane is installed in the middle section with a partition. Its function is to collect the liquid thrown out by the impeller, so that the flow rate of the liquid is reduced, and part of the speed energy head is converted into a pressure energy head. It is introduced into the next stage evenly or discharged through a diffuser to make the water flow uniformly impact the turbine, which is the main component to adjust the load of the unit. When the unit needs to be shut down, the guide v...

AI Technical Summary

Problems solved by technology

When the unit needs to be shut down, it is necessary to close the guide vane first. If the guide vane leaks water to a certain extent, the water turbine cannot be shut down normally, and the load of the unit cannot be adjusted normally. In severe cases, safety accidents may occur. After the leaf is closed, the gap is too large, or some guide vanes cannot be controlled and used normally, so it is extremely important to detect the water leakage of the guide vane, but there is currently a lack of effective detection methods

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