Flow measuring and transmitting device of dam infiltration flow of reservoir

Abstract

The invention discloses a flow measuring and transmitting device of dam infiltration flows of a reservoir, comprising a field measuring unit and an indoor receiving unit, wherein the field measuring unit comprises a flow measuring device and a transmission circuit, the flow measuring device comprises a triangular flow measuring weir, a triangular residue separating drum, a floater, a guide rod, a guide ring and a differential transformer; the triangular flow measuring weir is embedded into an infiltration flow open canal water-retaining weir to be connected with the floater; the floater is fixedly connected with the guide rod; the guide rod is connected with a movable armature iron; the differential transformer comprises a secondary winding, a primary coil winding and the movable armature iron and is coupled with a device with coefficient changed along with the up-and-down movement of the armature iron, wherein the movable armature iron is positioned between the secondary winding and the primary coil winding and moves up and down along with the lifting of the floater; the floater has very reliable work when used as a device for detecting a liquid level without being influenced by the canal bottom sullage of an infiltration flow weir, weather and temperature; and the differential transformer is sensitive and durable, has high precision and is widely used for measuring physical quantities such as distances, displacements, and the like in the industrial production process.

Description

Technical field: [0001] The invention relates to a flow measurement device, in particular to a measurement transmission device for reservoir dam seepage flow. Background technique [0002] Among the large number of small and medium-sized reservoirs in my country, most of them were built with soil and stone in the 1950s to 1970s. Due to the limited compactness of the earth-rock dam itself, there are always different degrees of leakage in the dam. When the water level upstream of the reservoir changes, the flow of water leaking from the dam body will also change accordingly. For a reservoir that has been in operation for many years, the interior of the dam body tends to be uniform and stable, so the law of the seepage rate changing with the upstream water level also tends to be stable. Therefore, the size of the seepage has become an important indicator to measure the safe operation of the reservoir dam. According to the national reservoir earth-rock dam safety monitoring re...

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Problems solved by technology

Due to its own structure, the piezoresistive liquid level sensor has a relatively high probability of being damaged...

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