Gravity pressure water delivery system with automatic-adjusting weir well

A water delivery system and automatic adjustment technology, applied in water conservancy projects, water supply installations, water supply installations, etc., can solve the problems of maintenance, maintenance and update being controlled by people, high management costs, and increased pressure on the downstream pipelines of water delivery pipes. It is beneficial to hydraulic inertia control, simple hydraulic control, and the effect of reducing the buried depth of pipes and culverts

Active Publication Date: 2010-03-17
天津市水务规划勘测设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the following situation will occur: when the flow is lower than the design flow, the head loss decreases, resulting in surplus energy, and the pressure of the downstream pipeline of the water delivery pipe increases more
Correspondingly, the following problems are brought about: the increase of pipeline pressure will firstly increase the project investment, and secondly, it will not be conducive to safe water delivery; , High sensitivity to foreign matter, high potential risk, complex operation and management, high management costs; it is necessary to set up auxiliary facilities and accessories such as large-diameter butterfly valves, overpressure relief valves, reducers, branch pipes, elbows, etc., and the power load level High, it needs to install electromechanical equipment with high safety and reliability, the project layout is complex, and the investment is high; especially the key components of the control valve need to rely on foreign countries, and future repairs, maintenance and updates are controlled by others, which is very unfavorable to project operation and management

Method used

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  • Gravity pressure water delivery system with automatic-adjusting weir well
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  • Gravity pressure water delivery system with automatic-adjusting weir well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is a kind of gravity pressurized water delivery system with automatic adjustment weir well, such as figure 1 shown. The system described in this embodiment includes: an upstream water delivery inlet 3 arranged on the water supply side and a downstream water delivery outlet 6 arranged on the water supply side, and at least one water delivery outlet is connected through a pipeline 5 between the water delivery inlet and the water delivery outlet. Adjust weir well 4,401. The regulating weir well includes: the weir well water inlets 8 and 801 at the bottom of the inlet parapets 7 and 701 of the regulating weir well connected to the upstream pipeline, the two sides of the inlet parapet are respectively connected to the weir well side walls, and the weir well side walls are connected to the regulating weir well side walls. The outlet parapet 10, 1001 of the weir well, the bottom of which is the weir well water outlet 11, 1101 connected with the downstream wate...

Embodiment 2

[0034] This embodiment is an improvement of Embodiment 1, which is the refinement of the overflow weir in Embodiment 1, such as figure 2 shown. The overflow weir of the regulating weir well described in this embodiment is a rounded broken-line practical weir type, and the distance from the inlet parapet to the center of the overflow weir (or "upstream distance of the overflow weir", or more simply "upstream of the weir") ) is not less than the height of the water inlet of the weir well, and the height of the overflow weir is: at the minimum operating flow rate, the submerged depth of the water inlet of the weir well is not less than 1.0 meters, the submerged depth of the weir well outlet is not less than 1.5 meters, and the weir top to the regulating The height of the wellhead of the weir well is greater than or equal to the height of the water inlet of the weir well, and the distance between the center of the overflow weir and the outlet parapet (or "distance downstream of t...

Embodiment 3

[0096] This embodiment is an improvement of Embodiment 2 and a refinement of Embodiment 2, such as Figure 5 shown. A stilling pool 13 is set between the overflow weir of the regulating weir well and the outlet breast wall in this embodiment, and 3 to 4 vortex-eliminating beams 12 are arranged horizontally and arc-shaped above the stilling pool, and the vortex-eliminating beams It is a rod-shaped cylinder, the cross arm is between the two side walls, and the height is higher than the overflow weir crest.

[0097] In order to increase the depth of the water cushion downstream of the overflow weir and improve the energy dissipation rate, the floor elevation of the downstream side of the weir well is 1.5m lower than that of the bottom plate of the downstream box culvert entrance to form a stilling pool, which is connected to the bottom plate of the downstream box culvert with a slope of 1:1. connect. In order to prevent the vortex of the through-type funnel, a vortex-eliminatin...

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Abstract

The invention relates to a gravity pressure water delivery system with an automatic-adjusting weir well, in particular to a hydraulic adjustment and control system used for water delivery engineering.The system comprises: an adjusting weir well which is arranged between a water inlet and a water outlet and connected through a pipeline. The weir well comprises: a weir well water inlet connected with an upstream pipe at the bottom part of the inlet breast wall of the adjusting weir well, wherein two sides of the inlet breast wall are respectively connected with the side wall of the weir well; the outlet breast wall of the adjusting weir well is connected with the side wall of the weir well and the bottom part of the outlet breast wall is a weir well water outlet connected with a downstreamwater delivery pipe; an overflow weir is arranged at the bottom part of a shaft between the inlet and the outlet breast wall and lies across between two side walls; for longer gravity pressure water delivery engineering, different water delivery flow rates need different water heads; the adjusting weir well can automatically adjust the water heads; when the water delivery flow rate is less than design flow rate, surplus water heads are consumed in sections and the internal water pressure of a pressure pipe culvert is reduced; and at the minimum operating flow rate, the minimum pressure requirement indispensible to the pipe culvert is kept. The water delivery system not only has simple hydraulic control, but also ensures the safe and reliable water delivery of the engineering.

Description

technical field [0001] The invention relates to a gravity pressurized water delivery system with an automatic adjustment weir well, which is a hydraulic system and a hydraulic control system used in water delivery projects. Background technique [0002] Water delivery methods include non-pressurized gravity water delivery, pressurized gravity water delivery, pressurized water delivery, combined gravity and pressurized water delivery, etc. Under normal circumstances, when there is enough terrain height difference available for water delivery, priority should be given to Select the pressure gravity water delivery method. The hydraulic height difference at the start and end of water delivery is the available water head for pressurized gravity water delivery. After determining the design flow rate of water delivery, the available water head should be utilized as much as possible, and the diameter of the water delivery pipe should be reduced as much as possible, so as to achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B1/00E03B1/02
Inventor 吴换营景金星张志颇李惠英刘来成黄运玉蔡付林杨开林宁金钢王云静
Owner 天津市水务规划勘测设计有限公司
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