A method for installing a barthel metering tank of a sewage treatment plant without stopping production and a positioning tool

By combining a portal rigid frame and total station closed-loop fine adjustment with multi-layer sealing technology, the problem of millimeter-level precise positioning and reliable sealing of the Parshall metering tank in the sewage treatment plant under non-stop operation conditions was solved, achieving high-precision installation and underwater stability of the tank.

CN122306185APending Publication Date: 2026-06-30赵有刚
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
赵有刚
Filing Date
2026-05-09
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In wastewater treatment plants, existing technologies struggle to install and reliably seal Parshall flumes with millimeter-level precision without interrupting production or discharging water, especially under conditions of strong water flow, where traditional methods are insufficient to achieve rigid constraints and fine-tuning of the flume.

Method used

The trough is suspended by a portal rigid frame and combined with total station closed-loop fine adjustment and multi-layer sealing technology. The trough is positioned with millimeter precision and reliably sealed underwater through six sets of three-dimensional adjusting screw assemblies, including quick-setting sealing material, water-swellable water-stop strips and layered grouting.

Benefits of technology

It achieves installation accuracy of ≤2mm throat width deviation and ≤2mm weir crest elevation deviation in water flow with a velocity of 1.8m/s, ensuring the normal operation of the sewage treatment plant, avoiding the risk of shutdown and biochemical system collapse, and providing a reliable underwater seal.

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Abstract

This invention discloses a method and positioning fixture for installing a Parshall metering flume in a wastewater treatment plant without interrupting operation and while the flue is running, belonging to the field of wastewater treatment equipment installation and construction. This method solves the problems of high water flow impact, difficulty in underwater millimeter-level positioning, and seal failure during replacement of old flumes under high-flow open channel operation conditions without interrupting operation. The procedure involves: prefabricating a rigid positioning frame with adjustable three-dimensional screws mounted on the crossbeams; suspending the flume in the water, connecting the end of the vertical screws to the lifting lugs on the flume top, and suspending it by the frame for rough positioning; setting up a total station to collect the three-dimensional coordinates of the flume's characteristic points in real time, using measurement and deviation feedback to drive three-axis fine-tuning until the centerline coincides, the throat width deviation is ≤2mm, and the weir crest elevation deviation is ≤2mm; finally, layered composite sealing is performed, with the front seam of the bottom plate sealed with a mixture of wire mesh and waterproof material, and the vertical seams on both sides sealed with expansion sealing strips, and C40 grout is injected in two stages. The installation accuracy and sealing of this method have passed testing, and it is economical and avoids environmental risks.
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