RU2606993C1 - Horizontal slitted drain filter - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to field of hydrotechnical, reclamation, aquicultural construction for horizontal drainages fitting out. Filter is made from round cross-section rods, installed along generatrix along filter axis, connected by stiffness rings from polypropylene, and on outside has water receiving surface from basalt fiber based filtering mats. Frame forming rods and filtering mats of individual links are “overlapped” interconnected with application of “Sprut” glue with formation of continuous water receiving surface.

EFFECT: increasing of filtration efficiency by creating of drainage waters reception continuous uniform front.

1 cl, 5 dwg

Description

The invention relates to the field of hydraulic engineering, land reclamation, water management for horizontal drainage equipment.

Known designs of filters of horizontal drainages (1, 5-7). They can be made from various materials, in various ways. Water through holes in these structures are holes of various shapes in pipes, welded metal frames, injection molding and typesetting structures. The water-receiving surface of the drains is mainly sand-gravel, mesh devices of various materials. Given that the pressure loss of the filtered underground water on the filters and the drainage life are directly proportional to their initial permeability, an increase in the duty cycle of the water intake surfaces and filter frames is given priority (1-3).

An analysis of the prototypes shows that the closest analogues of the invention are welded slotted metal filters (Fig. 1), Nold fiberglass slotted filters (Fig. 2), Schönebecker prefabricated filters, horizontal permeability drainage filter (7 ) The width of the slits in them is mainly 0.8-2 mm. The rigidity of most filter frames is only 8-12.5%. The use of horizontal drainage filters of increased permeability (duty cycle more than 50%) is restrained by the considerable complexity of the work on their manufacture. The filter cages are sprinkled with classified sand and gravel material of calculated fineness in several layers. The thickness of each layer of the inverse filter is, as a rule, 100-200 mm according to the technological conditions. The connection of the individual links of the filters in the column is carried out by blind pipes on the thread or welding. With a filter link length of 3000 mm, the length of the connecting pipes often reaches 200-500 mm (more than 10% of the length of the water intake part). In this case, a single continuous front of reception of filtered water along the drainage length is not created. The end sections of the drain links are zones of increased resistance to the filtration flow. Thus, the existing designs of horizontal drainages of the prototypes are characterized by the absence of a continuous homogeneous front for receiving filtered water, low duty cycle, the need for spending large volumes of classified sand and gravel material when installing large volumes of labor, and considerable laboriousness of work.

The technical result of the invention is the development of a horizontal drainage filter design with a continuous homogeneous front for receiving drainage water.

This technical result is achieved in that the horizontal drainage filter is made of round basalt plastic rods installed along the generatrix along the filter axis, connected by stiffening rings made of polypropylene and has a water-receiving surface from the filter mats based on basalt fiber, with frame-forming rods and filter mats of individual links are interconnected "overlapping" with the application of glue "Octopus" (known according to the patent for the invention of the Russian Federation No. 2259378 and TU 5772-002-9067954 4-2013) and the formation along the length of a continuous water intake surface. When the outer diameter of the connecting rings of rigidity is 300 mm, the distance between them is 200 mm, the width of the rings is 20 mm, the diameter of the reinforcing bars is 14 mm, the inner diameter of the rings is 250 mm, and the number of cores is 8, the filter frame duty cycle will be 73.9%. The porosity of the intake filter mat exceeds 90%, and their permeability is 0.58-0.93 cm / s.

The invention is illustrated by drawings.

In FIG. 1 shows the design of a slotted filter made of metal rods 2 with supporting stiffness belts 3 and a pipe 1. In FIG. 2 shows the construction of a fiberglass slotted filter with slots 4 of the working part, a connecting nipple 5 and a drain pipe 6. FIG. Figure 3 shows the design of a horizontal slotted filter with a water intake surface made of filter mat, which includes round basalt plastic rods 7, stiffening rings made of polypropylene 8, filter mats based on basalt fiber 9, Sprut glue 10, water inlets 11, distances between stiffness rings 12. In FIG. 4 and 5 show the construction of basalt-plastic rods 7 and connecting rings of rigidity 8 with sections.

The proposed device differs from the known ones by the continuity of water intake along the drainage length due to the lack of connecting blind sections between the links where increased hydraulic resistance occurs. Thus, the invention meets the criterion of novelty.

In the proposed device, the duty cycle of the filter frame, in contrast to the prototype (on average 10-12%) is more than 70%. When installing drainage, the use of skilled labor is not required. In addition, the proposed drainage device does not require the use of classified sand and gravel. For better drainage conditions, the assembled structure can be sprinkled with any sand and gravel material with a permeability greater than the reservoir. Thus, the invention meets the criterion of a significant difference.

The assembly of the filter links can be performed both in the workshop and in the field at the prepared site. On a leveled area according to the template, stiffening rings (8) are collected on basalt-plastic rods (7) from the calculation of the installation through 100 mm. After a set of rings, the gap between the rods and the holes in the rings is smeared with Octopus glue (10), after which a filter mat cover is put on. The link is laid at the bottom of the prepared trench and the same link is brought in with an overlap of 100 mm over the rods and mats and glued with “Octopus”, then the third link is laid, and the first is filled with sand and gravel and then the material according to the technological scheme.

The filter is horizontal drainage, slotted as follows. After laying horizontal drainage and connecting it to the water intake well, they begin to backfill it. If the construction of the drainage was carried out under the guise of a water reduction, then after its construction, the water reduction system is turned off and the drainage is put into operation. Drainage water enters the filter through filter mats in the slots between the rods and is diverted to the water inlet by gravity.

Horizontal drainage filter, slotted, made of basalt-plastic rods of circular cross-section, installed along the generatrix along the filter axis, connected by stiffening rings made of polypropylene, and has a water-receiving surface from the filter mats based on basalt fiber, and the frame-forming rods and filter mats of the individual links are interconnected "Overlap" with the application of glue "Octopus" and the formation along the length of a continuous water intake surface.

The proposed designs work in non-aggressive and aggressive environments, can be effectively used for water reduction in environmental disaster areas

Information sources

1. Forecasts of flooding and calculation of drainage systems in built-up and built-up areas. Reference manual to SNiP., Stroyizdat, 1991, p. 272.

2. Gavrilko V.M. Filters for water intake, dewatering and hydrogeological wells. First edition M., Nedra, 1961.

3. Gavrilko V.M., Alekseev B.C. Drill hole filters. Second edition M., Nedra, 1976.

4. R. Eggelsmann. Drainage guide. M., Kolos, 1978, p. 255.

5. OST 33-10-73. Drainage filters made of artificial mineral fibrous materials. Technical requirements. M., Ministry of Water Economy of the USSR, 1973.

6. N.G. Pivovar, N.G. Bugai, V.A. The hilt. Drainage with fiber filters. K., Naukova Dumka, 1980.

7. Patent for the invention of the Russian Federation No. 2287043, 2006

8. Process flow sheet for technological protection of metal and concrete surfaces of coatings based on “Octopus-plus” compositions TU 5745-002- 80773555-2007.

Claims (1)

Horizontal drainage filter, slotted, made of basalt-plastic rods of circular cross-section, installed along the generatrix along the filter axis, connected by stiffening rings made of polypropylene, and has a water-receiving surface from the filter mats based on basalt fiber, and the frame-forming rods and filter mats of the individual links are interconnected "Overlap" with the application of glue "Octopus" and the formation along the length of a continuous water intake surface.

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