Bacher Cao of various materials

Purpose and Introduction

Open channel flow meters are applied in all urban water supply and 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. The commonly used open channel flow meters for measuring sewage in industry and public utilities can be roughly divided into two types based on measurement principles: weir method and flow measurement channel. The characteristics of weir flowmeter are: simple structure, easy installation, good measurement accuracy and reliability;

●external structure

●Technical Specifications

Throat widthmmFlow formula(L/S) Water level rangeh(mm)flow range(L/S)flow rangem3/hCritical submergence degree%long*wide*tall

51 120.7ha1.55 1.5--24 0.18--13.2 0.65--- 50 0.5 774*314*305

●Performance Characteristics

The characteristics of the Bacher groove flowmeter are: it is almost unaffected by changes in pipe wall roughness and other conditions, and the long-term variation of the measured value is small; The head loss of the Bacher trough is relatively small in non full pipe flow instruments, and there is almost no need to worry about the sedimentation and accumulation of solid matter;

●Precautions for installation of Bacher groove：

Step 1: Place the Bacher trough into the open channel and keep the trough level,

Requirement:（1）Keep the discharge downstream of the Bacher trough unobstructed. No water accumulation, if not unobstructed. Maintain a water level difference greater than or equal to30MM.
（2）There is a straight section in front of the Bacher groove1-3The buffer zone should be at a distance of meters, and the buffer channel should be level with the bottom of the tank to facilitate ultrasonic measurement.
（3)It is necessary to ensure that there is a water level difference downstream of the Bacher trough, the discharge is smooth, and there is no water accumulation.
Step 2: Pour concrete or brick the left and right sides of the Bacher groove to ensure that the groove does not deform. There should be support inside the large groove to ensure that it does not protrude. Ensure that all water flows through the Bacher trough. The installation of the Bacher groove must be horizontal. If the distance between the groove and the channel is too large, use bricks to build it so that the distance between the groove and the brick is always maintained50-100Millimeters, then fill with cement mortar.

（4）Several situations for installing Bacher slots:

Key points of Bacher groove installation:

It is necessary to ensure that there is a water level difference downstream of the Bacher trough, the discharge is smooth, and there is no water accumulation.

Note: The support of the Bacher trough is located upstream of the water flow.