A guide vane water leakage detection system

Abstract

The application discloses a guide vane water leakage detection system, which includes a distance sensor, a central controller and a liquid level detection device. The liquid level detection device includes a liquid level gauge, a through pipe and a first bracket. The distance sensor, the liquid level The gauges are respectively electrically connected to the central controller, the first bracket is set in the through pipe, the liquid level gauge is set on the first bracket, and the installation direction of the liquid level gauge is parallel to the through pipe The axis direction of the water inlet; the liquid level gauge is used to detect the liquid level at the vent hole, and the distance sensor is used to detect whether the water inlet gate is located at the bottom of the water inlet. When the water inlet gate is located at the bottom of the water inlet, the distance sensor will The information that the water gate is at the bottom of the water inlet is sent to the central controller, and the central controller starts to record the liquid level measured by the liquid level gauge. The central controller judges whether the guide vane is leaking according to the change of the liquid level. Water leakage occurs when the liquid level at the vent hole drops, which can realize the detection of the sealing effect of the guide vane.

Description

technical field [0001] The invention generally relates to the monitoring technology of a water turbine unit in a hydropower plant, and in particular to a guide vane water leakage detection system. Background technique [0002] The guide vane is one of the most important castings and forgings in the water guide mechanism of the hydro-generator set. The function of the guide vane is the same as that of the volute, and it is mostly used in segmented multi-stage pumps. In the multi-stage centrifugal pump, the guide vane is installed in the middle section with a baffle, and its function is to collect the liquid thrown out by the impeller to reduce the flow rate of the liquid, and after converting part of the velocity energy head into a pressure energy head, Then evenly introduce it into the next stage or discharge it through the diffuser pipe, so that the water flow can evenly impact the turbine, which is the main component to adjust the load of the unit. When the unit needs to ...

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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