A kind of preparation method of gravel-carrying filter pipe

Abstract

A method for preparing a gravel-carrying filter pipe. A gravel-carrying water filter pipe, including a water pipe made of polymer materials, uniformly slit on the pipe wall in the axial direction of the water pipe, that is, the length direction, the width of the slit is 0.25-0.80mm, and the two ends of the water pipe are internal and external threaded structures. The length of the interval is 80-150cm; the outer side of the slit of the water pipe is covered with a filter screen, and there is a uniform granular filter material between the filter screen and the wall of the water pipe. Shaped fixing bracket, in which the covering filter screen is fixed between the two fixing brackets, the gap formed by the inner fixing bracket is filled with granular filter material, the thickness of the powder filter material is 20‑30mm, and the gap between the two fixing brackets The distance is 10-60cm.

Description

technical field [0001] The invention relates to a water filter pipe. In particular, a gravel-carrying filter pipe and its preparation. Background technique [0002] The filter pipe, in addition to water intake, can also prevent the soil or rock particles around the well wall from flowing into the well to block the well pipe, and at the same time support and protect the well wall, so that the pumping hole can be used normally. Some hard fissures and dissolved aquifers have stable well walls and no loose fillings, so there is no need to install a water filter pipe when pumping water, and a suitable water filter pipe must be installed for loose pore aquifers or broken bedrock aquifers. Cement and gravel filter pipes are also commonly used in agricultural water supply wells, and the brick and wood well walls of civilian wells actually play the role of filtering and purifying water resources. At the same time, in large-scale national projects, such as the South-to-North Water D...

AI Technical Summary

Problems solved by technology

Slotted screen, due to technical and cost reasons, the width of the slot is greater than 0.15mm (the plasma slot can reach 0.15mm, and the laser slot can reach a minimum of 0.2mm, but the cost is too high and it is not suitable for the suction filtration of groundwater and agricultural water treatment), the existing slotted screen pipe is used for oil production and sand control pipes in the process of oil exploitation, which can bear higher costs, but the slotted pipe is suitable for high muddy, cohesive soil, and fine sand Suction filtration of groundwater has no good effect

Some slotted pipes use radial rather than axial (lengthwise) slots, which have a great impact on the strength of the pipe (easy to break at the seam)

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