Buoy type adjusting device on area of waterway
Patent Information
- Authority / Receiving Office
- CN ยท China
- Current Assignee / Owner
- GUIYANG AL-MG DESIGN & RES INST
- Publication Date
- 2005-01-12
- Estimated Expiration
- Not applicable ยท inactive patent
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Abstract
Description
Technical field:
[0001] The invention relates to an automatic adjustment device for the flow section of a gravity drainage pipe with large flow change. technical background:
[0002] In the severe cold area, the project adopts the comprehensive pipe ditch to lay the pipeline. For the case where the rainwater and production wastewater are discharged in the integrated pipe ditch using the drainage ditch, the following problems must be solved at the connection between the integrated pipe ditch and the downstream drainage pipes and canals. Take measures to prevent the cold air from the outer part of the pipeline from entering the integrated pipe ditch and the integrated pipe communication gas well to form an air flow channel through the pipe channel, causing freezing damage; at the same time, try to reduce the gas flow in the outer part of the pipe channel to drain its own heat and avoid drainage pipes. It freezes. To solve the above problems, water seal wells can be used to cu...