SU885461A1 - Filter for vertical drainage well - Google Patents

Description

(S) FILTER FOR VERTICAL DRAIN WELL

one

The invention relates to land reclamation and can be applied in wells for water supply and dewatering.

The closest in technical essence and the achieved effect is a filter for a well of vertical drainage, including a sectional tube, the lower and upper edges of each section of which are bent tl.

A disadvantage of the known filter is rapid wear, frequent repairs and difficult replacement of filter sections.

The purpose of the invention is to improve the performance properties of the filter.

To achieve this goal, in the filter that includes a sectional tube with curved edges, the upper edges of the pipe are additionally bent downwards, and the lower ones are L-shaped.

In addition, the lower edges of the pipe are provided with annular projections.

; The partitioned tube is perforated.

The drawing shows the proposed filter, a general view.

Below the perforation of the filter frame 1, on the casing 2, there is a ring 3 with a protrusion. The ring is fastened to the column with bolts C through the bracket S and made of anti-corrosion material. A section of the replaceable filter 6 is installed on the protrusion of the ring 3, a subsequent section is installed on its upper curved end, etc. In the upper part in the transition zone of the cylinder at the end at the top

ts (last) section of the filter 6 is installed annular elastic seal 7.

Alternatively, each filter section on the lower inward-curved portion

20 has annular projections 8 for collecting suspended particles.

The installation and removal of filters is carried out using, for example, conical catchers used to extract separated submersible pumps from wells. The catcher of the conical part enters the upper part of the filter and snaps against it and extracts it to the surface one by one.

The assembly sequence on the protrusion of the ring 3 is installed with the part of the filter section 6 bent inward, and the subsequent section on its conical protrusion, etc. The last upper section of the filter is lowered into the well with compaction 7.

Removing (disassembling) the filter is carried out in reverse order.

The proposed filter design

made at the height of the section, which allows them to be selectively replaced as they fail (clogging, etc.), carry out cleaning of the sections on the surface of the earth, reducing the effort to raise and lower the sections.

Each section is made in the form of a pipe and is bent at an angle to the vertical, forming an annular cavity with the inner wall of the section in the lower part, and a forward and reverse truncated cone in the upper part. Such a construction of sections ensures their good centering relative to the walls of the column, the concavity of the top and bottom, increases the rigidity of the structure.

The design of the upper part of the section ensures its extraction from the well with the help of catchers. The concavity in the lower part of the section facilitates installation on the previous section.

In addition, using the annular protrusions mounted on the inward-curved bottom, which is affected by the filtration flow and the separation of suspended particles is carried out, it is possible to prevent them from settling to the bottom and to prevent the air-lift of the well.

The dimensions of these annular protrusions are chosen so that the cleaning of sediments of suspended particles coincides with the dates or is close to the date of chemical treatment.

filter.

Claims (3)

1. A filter for a vertical drainage well, including a sectional tube, the lower and upper edges of each section of which are bent, characterized in that to improve operational properties, the upper edges of the pipe are additionally bent downwards, and the lower ones are L-shaped. 2. The filter according to claim 1, wherein the lower edges of the pipe are provided with annular projections. 3. The filter according to claim 1, characterized in that the pipe is made perforated. I The source of information taken into account in the examination 1. USSR author's certificate N 195973, cl. E 03 B 3/18, 1966.