Water level pumping and lowering device for hydraulic engineering construction

Abstract

The invention relates to the technical field of water conservancy engineering construction equipment, and discloses a water level pumping and lowering device for water conservancy engineering construction, including a pump room, a main pipe, a filter pipe and a first water suction pipe. The pump room is connected with the main pipe and driven by negative pressure Water flows in the main pipe. In this water level pumping device for water conservancy construction, the water absorption speed in each well is self-adapted according to its return water speed, while ensuring that the water in each well drops rapidly, it will not suck up, and the suction of the pump will be reasonably distributed. , maximize the use of water pump suction, improve energy efficiency, and reduce the power requirements of the water pump. Secondly, precipitation and water level maintenance show different water absorption speeds to ensure pumping efficiency. Through the balance of water absorption speed and recovery speed, the water level is maintained. The water pump is always Maintaining a constant working efficiency fundamentally avoids the frequent start and stop of the equipment, and keeping the water level constant also greatly reduces the total amount of pumped water and reduces equipment costs.

Description

technical field [0001] The invention relates to the technical field of water conservancy project construction equipment, in particular to a water level pumping and lowering device for water conservancy project construction. Background technique [0002] Water conservancy projects are mostly constructed in areas such as rivers, coasts, and tidal flats. These areas are mostly fluid soil layers such as upper sand and lower rocks or mud flats. When carrying out deep foundation pit construction in such areas, the well point dewatering method is usually used to lower the groundwater level, that is, a certain number of filter wells are buried around the foundation pit, and water is pumped from them by pumping equipment, so that the groundwater level is always maintained at the level of the bottom of the pit. , until the backfill is completed or the underground structure has sufficient anti-floating capacity. [0003] When maintaining the groundwater level, the amount of pumped wat...

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Problems solved by technology

[0003] When maintaining the groundwater level, the amount of pumped water and the amount of incoming water are generally in a state of balance. However, the permeability and water permeability of the formations in different locations and at different times are different. Select the water pump with the corresponding flow rate respectively. Therefore, at any time period, it is impossible to guarantee that the water pumping volume and incoming water volume of each well are exactly the same, that is, some wells will be drained quickly, and the water level of some wells will not drop. On the one hand, Reduces pumping efficiency, on the other hand, idling reduces energy efficiency and there is waste

[0004] Secondly, the equipment usually controls the valve and water pump through the upper and lower water level sensing instruments to maintain the water level in an area to ensure that the water level is kept below the standard and the water pump does not need to be started and stopped frequently, but the water level needs to be kept higher than the pit bottom elevation. A large height difference means that more water needs to be pumped and the cost is higher. Secondly, the water pump needs to be started and stopped frequently, which is more likely to be damaged. In addition, the underground environment is also easy to damage the sensor and reduce the reliability of the equipment.

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