Water collecting and returning integrated well structure with filtering pipe moving downwards

Abstract

The invention discloses a water collecting and returning integrated well structure with a filtering pipe moving downwards. The water collecting and returning integrated well structure comprises an inspection well. The inspection well is arranged on an original soil layer. A well lid is arranged at the top of the inspection well. A through hole is reserved in the bottom of the well. A well pipe is arranged in the through hole. A material filtering layer is arranged on the outer side of the well pipe. A water lifting pipe is inserted in the well pipe and is connected with a submersible pump. The water lifting pipe is connected with a main pipeline through a one-way valve and a valve. A water returning pipe is arranged at the lower end of the inspection well. The water returning pipe is connected with the main pipeline through a valve. The main pipeline is connected with a water collector through a valve, and the main pipeline is connected with a water distributor through a valve. The lower end of the well pipe is provided with a filtering pipe. The filtering pipe is arranged at the bottom of the well. The top of the filtering pipe is lower than the top of a rock layer. Due to the fact that the filtering pipe is arranged at the bottom of the well and corresponds to the rock layer, the material filtering layer cannot collapse, and a hole is avoided. In addition, the distance of water passing through the material filtering layer is greatly enlarged compared with that in the prior art, and therefore a filtering effect is improved.

Description

technical field [0001] The invention relates to the technical field of water-source heat pumps, in particular to a water-collecting-water-combining-well structure. Background technique [0002] Water source heat pump technology is a low-temperature low-level thermal energy resource formed by using solar energy and geothermal energy absorbed by shallow water sources on the earth's surface, and adopts the principle of heat pumps to realize the transfer of low-level thermal energy to high-level thermal energy through a small amount of high-level electrical energy input. The outlet well or return well is an indispensable part of water source thermal energy technology; the existing technology generally uses multiple separate water collection wells and return wells, which inevitably causes an increase in construction and operation costs; in addition, the existing Since the backwater well has no sand blocking structure, the sediment in the system operation will deposit on the filte...

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Problems solved by technology

The outlet well or return well is an indispensable part of water source thermal energy technology; the existing technology generally uses multiple separate water collection wells and return wells, which inevitably causes an increase in construction and operation costs; in addition, the existing Since the backwater well has no sand blocking structure, the sediment in the system operation will deposit on the filter material layer of the backwater wellhead, causing the filter material layer of the backwater wellhead to fail. In addition, because there is no sand control edge, the bottom of the inspection well is full of silt , workers inspection and construction are very difficult

[0003] The underground structure is generally divided into clay layer, aquifer layer and rock layer from top to bottom. The existing water collection well generally sets the filter tube in the aquifer layer, and due to the scouring effect of the water flow during operation, the filter material layer on both sides of the filter tube The soil is continuously lost, resulting in Figure 4 The huge cavity 21 in the cavity, the sand in the cavity is mixed with the filter material, which reduces the filtering effect, and the filter material needs to be continuously replenished, which undoubtedly increases the operating cost and reduces the efficiency of the unit

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