River drainage metering equipment Basher trough

NegotiableUpdate on 01/17

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Overview

The river drainage metering device, Bacher trough, is a commonly used metering trough for measuring fluid velocity and flow rate. The Bacher trough consists of three parts: the inlet section, the throat section, and the outlet section. The trough, the nearby channel, the downstream channel, and the static water well are constructed with concrete or bricks, and coated with cement mortar and polished; It can also be prefabricated with materials that are corrosion-resistant, resistant to water flow erosion, and do not deform. Channel drainage generally uses large Bacher metering tanks. River drainage metering equipment

Product Details

River drainage metering equipment Basher trough

Channel drainage generally adopts a large Bacher metering tank, which consists of three parts: the inlet section, the throat section, and the outlet section. The metering tank, the nearby channel, the downstream channel, and the static water well are constructed with concrete or bricks, and are coated with powder cement mortar and pressed smooth; It can also be prefabricated with materials that are corrosion-resistant, resistant to water flow erosion, and do not deform.The approach channel is a straight and flat rectangular open channel, and its length should not be less than 10 times the width of the channel.The static water well is located on the outer side of the Bacher measuring tank wall, with the distance from the tank wall minimized as much as possible.

Principles of Computing

The larger the flow in the open channel, the higher the liquid level; The smaller the flow rate, the lower the liquid level. For general channels, there is no definite correspondence between liquid level and flow rate. Because the same water depth and flow rate are also related to the cross-sectional area, slope, and roughness of the channel. Installing a measuring weir groove in the channel, the correspondence between the upstream water level and flow rate of the channel mainly depends on the geometric dimensions of the weir groove, as the gap of the weir or the contraction of the groove is smaller than the cross-sectional area of the channel. The same measuring weir tank is placed on different channels, and the same liquid level corresponds to the same flow rate. The measuring weir channel converts the flow into liquid level. By measuring the liquid level of the water flow in the measuring weir tank, and then reverse calculating the flow rate based on the corresponding water level flow relationship of the measuring weir tank.

River drainage metering equipment Basher trough

Due to its smooth surface, low water level loss, minimal sedimentation of solid substances in water, low influence on flow velocity, and relatively small impact on the water level on the downstream side, the Bacher flow channel is used to measure the flow rate of other liquids such as industrial water.Such as urban water supply diversion channels, cooling water diversion and drainage channels for thermal power plants, sewage treatment inflow and discharge channels, industrial and mining enterprise wastewater discharge, as well as water conservancy engineering and agricultural irrigation channels.

Attention should be paid during installation

The centerline should coincide with the centerline of the channel to prevent water flow from deviating. After water is supplied, the flow state of the water should be free flowing. The submergence degree should be less than the specified critical submergence degree. There should be a straight section upstream that is greater than 5 times the width of the channel to allow water flow to enter smoothly. There is no lateral deviation or the impact force formed by the slope of the channel.

The Bacher flow channel should be installed firmly on the channel. The connection with the side walls and bottom of the channel should be tight and not leak water. Make all the water flow through the measuring part, which is the throat section inside the groove.