Multi-channel flow detection system with front straight pipe section

The utility model discloses a multi-channel flow detection system with a front straight pipe section. The multi-channel flow detection system comprises the front straight pipe section, a multi-channelvariable-range flow meter and a rear straight pipe section. The front straight pipe section comprises a conical part and a straight pipe rectifying part, and a straight pipe flange plate and a positioning hole are arranged on a port of the straight pipe rectifying part; and a plurality of straight pipe runners are arranged in the front straight pipe section. The multi-channel variable-range flowmeter comprises a flow meter shell, and a main measuring flow channel and at least one auxiliary measuring flow channel are arranged in the flow meter shell. The detection system comprises the flow meter and the front straight pipe section, the flow meter is provided with the main measuring flow channel and the auxiliary measuring flow channels, and the measuring range of the main measuring flow channel can be greatly incr