Rectangular dual self-permeation reverse filtration reinjection well head device

Abstract

The invention relates to a rectangular dual-type self-infiltrating reverse-filtering recharge well mouth device and belongs to the technical field of water conservation. The well mouth device comprises a hard well cover, a geotextile reverse filtering layer and a pressurizing mechanism, wherein the well cover consists of a well cover upper part and a well cover lower part, the well cover is a hollow bottomless cylinder on the whole, and the center of the upper part of the well cover is provided with an elongated slot which divides the well cover upper part into a rectangular left dual body and a rectangular right dual body; the outer surfaces of the left dual body and the right dual body and the bottom of the elongated slot are provided with water inlet holes; the well cover lower part is a non-water-permeable body; the geotextile reverse filtering layer is arranged on the outer side of the well cover and is fit with the shape of the elongated slot; the pressurizing mechanism comprises a vertical shaft and blades, upper end blades can rotate under the effect of water flow to drive lower end blades to synchronously rotate, and the lower end blades apply downward pressure to water which enters a recharge well to accelerate recharge speed. The device has the advantages that, under the situation that the external dimension of the well mouth device is unchanged, the flow passing capacity and anti-sediment and anti-washing capacity of a recharge pond can be obviously improved, and the service life of the recharge pond is prolonged.

Description

technical field [0001] The invention relates to a recharge well for self-seepage pressureless groundwater recharge, in particular to a rectangular dual water-inlet self-seepage reverse filtration recharge well head device, which belongs to the technical field of water conservation. Background technique [0002] How to preserve water in some water-deficient areas or how to prevent seawater backflow caused by excessive exploitation of groundwater in coastal areas is a major issue that restricts local people's life and economic development. The means to solve this issue are to strengthen people's awareness of water conservation. Effective use of rain and flood resources is also one of the important measures. [0003] In order to make full use of rain and flood resources, in seasonal rivers with no pollution or slight pollution, a kind of recharge well with the function of filtering particulate impurities in water is often arranged, that is, self-infiltration recharge well, also...

AI Technical Summary

Problems solved by technology

However, the problems of this self-seepage-recharge well are: 1. The self-seepage-recharge well is placed at the bottom of the river or the bottom of the canal, which is very easy to be silted up and washed away by the water flow, which affects the service life; 2. The recharge tank is buried in Underground, there is only a free water inlet section on the top of the recharge tank. In order to ensure sufficient recharge volume, the recharge tank requires a large cross-sectional area and a large amount of construction; 3. To build an ordinary recharge tank requires backfilling 10m 3 Left and right sand and gravel consume a lot of building materials; 4. The use of concrete manhole covers affects the amount of recharge; 5. Only the top surface can enter water, and the recharge capacity of the recharge well is low

[0005] However, since most of the rainfall is showers, the time for rainwater to flow in the river is short, and the permeable holes on the roof and side walls cannot meet the needs of recharge. However, the size of the permeable hole increases, which not only reduces the strength of the wellhead device, but also puts forward higher requirements for the strength of the geotextile filter layer, otherwise the impact of sand on the geotextile filter layer will easily damage the geotextile. The fabric filter layer, the sand and stone entering the reinjection well will reduce the water seepage function of the reinjection well; some technicians also try to increase the number of permeable holes in the wellhead device, and increasing the number of permeable holes will inevitably reduce the size of the permeable holes, although It can solve the strength problem of the wellhead device, but the overall reinjection volume is reduced; therefore, improving the reinjection volume and ensuring the strength and reliability of the wellhead device in this field have always been the bottleneck affecting the scale development of self-infiltration reinjection wells

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