Design and performance research of stainless steel water filter screen for groundwater circulation well remediation
In order to improve the tensile capacity of the stainless steel filter screen for the remediation of groundwater circulation wells,so that it will not be damaged when running down or lifting the pipe,and ensure the safe operation of the water filter screen in the well.The design of the water filter screen was carried out from three aspects:the overall structure,the screen wire type and the layout parameters,and the finite element simulation and laboratory tensile test were carried out to evaluate the tensile performance of water filter screens.The triangular stainless steel wire type and the fully welded wire winding process were used,and two kinds(6 kinds of specifications)of stainless steel water filter screens were developed.Finite element simulation and laboratory tensile test results showed that,the fractures of the screens all occurred at the weld seam between the joint and the screen cloth,and the simulation results were in good agreement with the experimental results.For the outer wound wire and inner vertical wire type water filter screen,with the increase of the screen pore size and the wire wound size,the maximum tensile load of the screen decreased gradually,SGl-0.9/2.3 screen showed the highest tensile load,the test and simulation results were 1 071.75 kN and 1 114.39 kN,respectively,with an error rate of 3.88％;for the outer vertical wire and inner wound wire type water filter screen,with the increase of the screen pore size,the cross-sectional area of the vertical wire of the screen decreased gradually,and the maximum tensile load of the screen decreased gradually,SG2-0.9/2.3 screen showed the highest tensile load,the test and simulation results were 1 662.06 kN and 1 668.23 kN,respectively,with an error rate of 0.37％.For the same screen parameters,the structure of outer vertical wire and inner wound wire can produce greater deformation,and its tensile was better than that of outer wound wire and inner vertical wire structure.The research results can provide theoretical guidance for the design of stainless steel water filter screen for the remediation of groundwater circulation wells.
groundwater circulation well remediationwater filter screenscreen parametertensile property
国家科技期刊平台
NSTL
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