A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SAND REMOVAL DEVICE OF SAND SEDIMENTATION POND
PROBLEM TO BE SOLVED: To provide a sand removal device effective for further removing a stop frequency of a sand lifting pump in removal sand.SOLUTION: A sand removal device of a low pressure sand collection system for stopping operation of a sand lifting pump when a water surface in a sand sedimentation pond becomes a predetermined low water level, by pumping up its collected sediment together with water by the sand lifting pump, by further collecting to a sand collection pit, by making the sediment deposited on a bottom surface of the sand sedimentation pond flow to a main trough, by injecting low pressure water by a nozzle into the bottom surface of the sand sedimentation pond, while keeping the sand sedimentation pond in a draining state, by starting the operation of the sand lifting pump provided in the sand collection pit, when the water surface in the sand sedimentation pond becomes a predetermined high water level or more, comprises: water level detection means for detecting that the water surface in the sand sedimentation pond becomes an intermediate water level or less between a high water level and the low water level; water supply means except for the nozzle for supplying water to the sand sedimentation pond from an external part of the sand sedimentation pond; and water supply control means for supplying the water for a constant time to the sand sedimentation pond by the water supply means when the water level detection means detects the fact of becoming the intermediate water level or less.SELECTED DRAWING: Figure 10
【課題】除砂中の揚砂ポンプの停止頻度をさらに低減させるのに有効な除砂装置を提供する。【解決手段】沈砂池内の水面が所定の高水位以上になったときに集砂ピットに設けた揚砂ポンプの運転を開始し、沈砂池を排水状態に保ちつつ、沈砂池の底面にノズルにより低圧力水を噴射して沈砂池の底面に堆積した土砂を主トラフに流し、さらに集砂ピットに集め、その集めた土砂を揚砂ポンプにより水と共に汲み上げ、沈砂池内の水面が所定の低水位になったときに揚砂ポンプの運転を停止する低圧集砂方式の除砂装置において、沈砂池における水面が高水位と低水位の間の中間水位以下になったことを検知する水位検知手段と、沈砂池の外部から沈砂池に給水する前記ノズル以外の給水手段と、水位検知手段が中間水位以下になったことを検知したときに、給水手段により沈砂池に一定時間給水する給水制御手段とを備えた。【選択図】図１０
SAND REMOVAL DEVICE OF SAND SEDIMENTATION POND
PROBLEM TO BE SOLVED: To provide a sand removal device effective for further removing a stop frequency of a sand lifting pump in removal sand.SOLUTION: A sand removal device of a low pressure sand collection system for stopping operation of a sand lifting pump when a water surface in a sand sedimentation pond becomes a predetermined low water level, by pumping up its collected sediment together with water by the sand lifting pump, by further collecting to a sand collection pit, by making the sediment deposited on a bottom surface of the sand sedimentation pond flow to a main trough, by injecting low pressure water by a nozzle into the bottom surface of the sand sedimentation pond, while keeping the sand sedimentation pond in a draining state, by starting the operation of the sand lifting pump provided in the sand collection pit, when the water surface in the sand sedimentation pond becomes a predetermined high water level or more, comprises: water level detection means for detecting that the water surface in the sand sedimentation pond becomes an intermediate water level or less between a high water level and the low water level; water supply means except for the nozzle for supplying water to the sand sedimentation pond from an external part of the sand sedimentation pond; and water supply control means for supplying the water for a constant time to the sand sedimentation pond by the water supply means when the water level detection means detects the fact of becoming the intermediate water level or less.SELECTED DRAWING: Figure 10
【課題】除砂中の揚砂ポンプの停止頻度をさらに低減させるのに有効な除砂装置を提供する。【解決手段】沈砂池内の水面が所定の高水位以上になったときに集砂ピットに設けた揚砂ポンプの運転を開始し、沈砂池を排水状態に保ちつつ、沈砂池の底面にノズルにより低圧力水を噴射して沈砂池の底面に堆積した土砂を主トラフに流し、さらに集砂ピットに集め、その集めた土砂を揚砂ポンプにより水と共に汲み上げ、沈砂池内の水面が所定の低水位になったときに揚砂ポンプの運転を停止する低圧集砂方式の除砂装置において、沈砂池における水面が高水位と低水位の間の中間水位以下になったことを検知する水位検知手段と、沈砂池の外部から沈砂池に給水する前記ノズル以外の給水手段と、水位検知手段が中間水位以下になったことを検知したときに、給水手段により沈砂池に一定時間給水する給水制御手段とを備えた。【選択図】図１０
SAND REMOVAL DEVICE OF SAND SEDIMENTATION POND
沈砂池の除砂装置
SUZUKI KENJI (author) / KAWAKAMI NAOYA (author)
2018-03-01
Patent
Electronic Resource
Japanese