Small well casing filter
By installing a plastic blind drain and a non-woven cotton layer at the bottom of the water collection pipe, and using a lifting rod to clean the blockage, the problem of water filter pipe clogging was solved, achieving efficient water filtration and a simplified cleaning process, thus promoting resource reuse.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGTIAN CONSTR GROUP
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-17
AI Technical Summary
In existing lightweight wellpoint dewatering technologies, filter pipes are prone to clogging, leading to poor drainage, difficult maintenance, and reduced efficiency.
A plastic blind drain and a non-woven cotton layer are installed on the outer side of the lower part of the water collection pipe. The pores of the plastic blind drain near the non-woven cotton layer are smaller than those near the water collection pipe. A lifting rod is installed at the bottom to facilitate the cleaning of blockages. The axial movement of the lifting rod shakes the soil, and the elastic movement of the soft filter material carries away the deposited soil.
It improves water filtration, simplifies the cleaning process, increases work efficiency, and promotes resource reuse.
Smart Images
Figure CN224133780U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building technology, specifically a drainage pipe. Background Technology
[0002] Lightweight wellpoint dewatering is a construction method for dewatering foundation pits. Wellpoint pipes are installed at regular intervals around the perimeter of the pit. A filter pipe is installed at the bottom of each wellpoint pipe and inserted into the permeable layer. A flexible hose connects the top of each wellpoint pipe to a main collection pipe, which is a Φ150 steel pipe with Φ40 suction inlets spaced at the same intervals as the wellpoint pipes. A vacuum pump then extracts water from the collection pipes, thereby lowering the groundwater level around the pit and ensuring the foundation remains dry. However, in practice, this technology has the following drawbacks: soil frequently clogs the filter pipe holes, causing poor drainage; furthermore, maintenance is difficult after the filter pipes become clogged, requiring them to be removed from the ground for cleaning and replacement, which affects work efficiency. Utility Model Content
[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a small well pipe filter, including a water collection pipe, a plastic blind trench is provided on the lower outer side of the water collection pipe, and a non-woven cotton layer is provided on the outer side of the plastic blind trench; guide holes are provided at the height of the water collection pipe corresponding to the plastic blind trench; the pores of the plastic blind trench near the non-woven cotton layer are smaller than the pores near the water collection pipe.
[0004] The lower part of the plastic blind drain is equipped with a lifting rod, which extends upward along the outside of the water collection pipe to the ground.
[0005] There are two lifting rods, which are symmetrically arranged at both ends of the water collection pipe.
[0006] The plastic blind drain is made of plastic rope wound into a tube shape, with the outer gap being smaller than the inner gap; the inner diameter of the plastic blind drain is greater than or equal to the outer diameter of the water collection pipe.
[0007] The advantages of this invention are: because it uses a soft filter material, if a blockage occurs, the mud can be shaken off by moving the lifting rod up and down, resulting in good filtration and high efficiency; in addition, the use of discarded plastic ropes facilitates resource reuse. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of this utility model;
[0009] Figure 2 for Figure 1 Schematic diagram of AA section;
[0010] Figure 3 This is a cross-sectional schematic diagram of another type of plastic blind drain. Detailed Implementation
[0011] The present invention will now be described in detail with reference to the accompanying drawings. As shown in the figures, the present invention includes a water collection pipe 1, a plastic blind drain 3 provided on the lower outer side of the water collection pipe, and a non-woven cotton layer 2 provided on the outer side of the plastic blind drain; guide holes 11 are provided at the height of the water collection pipe corresponding to the plastic blind drain; as shown in the figures... Figure 3 As shown, the pores of the plastic blind drain near the non-woven cotton layer 4 are smaller than those near the water collection pipe. The advantage of this design is that it not only has a good filtration effect, but also uses larger pores to provide radial support for the plastic blind drain. Furthermore, with the impact of water flow, it will undergo radial elastic movement, thereby carrying away the deposited soil through the water flow.
[0012] To further prevent clogging and facilitate shaking the plastic blind drain so that the clogging soil can be washed away by the water flow, a lifting rod 5 is installed at the bottom of the plastic blind drain. The lifting rod extends upward along the outside of the water collection pipe to the ground, ensuring that the operator can pull or press it down by hand. In this way, the axial movement of the lifting rod can be used to further shake off the deposited soil and improve the filtration effect.
[0013] Preferably, there are two lifting rods, symmetrically arranged at both ends of the water collection pipe.
[0014] The plastic blind drain is made of plastic rope randomly wound into a tubular shape, with the outer gap being smaller than the inner gap; the inner diameter of the plastic blind drain is greater than or equal to the outer diameter of the water collection pipe.
Claims
1. A small well tubular filter comprising a catch basin, characterized by: A plastic blind drain is provided on the lower outer side of the water collection pipe, and a non-woven cotton layer is provided on the outer side of the plastic blind drain; guide holes are provided at the height corresponding to the water collection pipe and the plastic blind drain; the pores of the plastic blind drain near the non-woven cotton layer are smaller than the pores near the water collection pipe.
2. The compact well tubular filter of claim 1, wherein: The lower part of the plastic blind drain is equipped with a lifting rod, which extends upward along the outside of the water collection pipe to the ground.
3. The compact well tubular filter of claim 2, wherein: There are two lifting rods, which are symmetrically arranged at both ends of the water collection pipe.
4. The compact well tubular filter of claim 2, wherein: The plastic blind drain is made of plastic rope wound into a tube shape, with the outer gap being smaller than the inner gap; the inner diameter of the plastic blind drain is greater than or equal to the outer diameter of the water collection pipe.