Water distributing and collecting device of heating system

The utility model provides a heat supply system water distributing and collecting device which comprises a plurality of middle pipe assemblies connected in sequence, the leftmost ends of the middle pipe assemblies are used for being communicated with a water supply main path or a water return main path, and the rightmost ends of the middle pipe assemblies are used for being communicated with an exhaust device or a drainage device. The two sides of the outer wall of the middle pipe assembly are provided with connectors used for being connected with the water distribution branch or the water return branch and control valves used for controlling the flow speed of media, the minimum center distance of the adjacent connectors after connection is 45 mm, and the middle pipe assembly comprises a plug part, a connecting part and an inserting opening part which are sequentially connected. And the plug part of any middle pipe assembly can be detachably fixed with the socket part of the other middle pipe assembly. The wa