DE2659588A1 - FILTER FOR SMALL FOUNTAIN - Google Patents

Description

Filters for small wells

The invention relates to filters for small wells, consisting of a metal jacket with a round cross-sectional shape and breakthroughs that are covered by metallic or non-metallic fabrics - preferably fine fabrics - and a closed tapered end (tip), while a thread is arranged at the open end.

Starting from a filter of the type under consideration, the object is to be achieved of creating a filter,

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which, without being damaged, can be introduced into the ground undamaged - even if this zone has a greater density and / or strength.

The task at hand is solved by a seamless tube made of high-strength steel in its jacket through holes are made, the diameter of which corresponds at most to the distance to the adjacent hole, and that a fabric is assigned to at least the bores on the inside.

In comparison to the filters known per se, the result considerable advantages, because as soon as the known filters are driven into the earth and onto a harder layer, as clay, loam, etc. get there, the so-called nail effect occurs. The filter does not penetrate any further, but begins to vibrate, deforms, especially laterally, i.e. it bends, etc. Due to this nail effect the longitudinal seam also bursts, usually directly on the thread, namely where the socket for the attachment pipe is provided. This has the further consequence that the connection thread / sleeve breaks apart and the filter can no longer be recovered. In addition, the ram protection begins tissues are deformed at the same time and compression

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gen (wave kinks). These negative phenomena are triggered This is because the known filters are rolled into a tube, e.g. from an elongated sheet metal, and welded lengthways will. For example, the dimension can be two inches, and so on. At the end, a point is attached and welded. Then a fine brass fabric is wrapped around the Perforated sheet filter laid and soldered on. A brass sheet is then perforated and used as a ram protection jacket, and although to protect against destroying or damaging the fine tissue when introduced into the earth to the fine tissue laid and soldered. These and similar embodiments have the disadvantages outlined above.

The introduction according to the invention is promoted by the fact that the tip of the filter is oriented obliquely to the axis Wing - so-called guide or control wing - has.

The simplified insertion is also ensured by the fact that the one completely or partially covering the holes Fabric is attached inside the e.g. cylindrical outer surface.

Further details of the invention emerge from the drawing and description, namely shows:

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Fig. 1 in principle a filter according to the invention and 2 shows a fabric which is designed here as a complete kit according to the invention (that is to say a structural unit) is.

Can be seen in Fig. 1, the seamless tube 3, which consists of a high-strength steel is created. The wall thickness results from the expected stress (Question of strength).

The holes 5 according to the invention are arranged so that the overall strength of the pipe for its intended purpose preserved. So it was proposed according to the invention, that the distance between the holes (meaning the material still standing between two holes, so, the distance 4) corresponds at least to the diameter of the holes.

Fabric 9 can be assigned to the individual bores 5; it is advisable to use a cylindrical fabric, which is provided tightly on the inside of the pipe 3; this fabric cylinder can, for example, be welded to the pipe at one end or be soldered on. At the opposite end (e.g. where tip 2 is located) also; you would do this operation

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then only carry it through before welding the tip 2 on. Or you can use a fabric insert 11 (Fig. 2) consisting of a cylindrical surface 13, the Fabric 14 has a correspondingly required mesh size, and at the end you can, for example, a ring 12 provide. This fits the diameter 15 (inner diameter of the pipe 3) to be selected. In other words, the diameter 16 is slightly smaller than the diameter 15 of the pipe 3.

It is also essential to the invention that the angle 7 - related on the axis of the filter 1 - can preferably be 45 °. Any other orientation, preferably between 15 ° to 75 ° is conceivable.

The holes can also be provided all around at the same height on the jacket of the pipe 3, at a distance for this purpose there is another hole arrangement - again all around - on the jacket, i.e. at an angle of 90 ° to axis 17, appropriate.

It is essential to the invention for driving in the filter that wings 8 are attached. This will add to the overall filter imparted a twist when turning. This improves the penetration, in particular of harder layers.

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The invention includes that the angle 10 at the top accordingly is to be selected appropriately, for example between 10 ° to 60 °.

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Claims (1)

PATENT APPROVAL 8000 MDNCHEN, 6.12.1976 / 1 DR.WILHELM HASSE - ^ - ^ m 4274 / Bi GRADUATE ENGINEER Patent claims 1.j filter for small wells, consisting of a metal Jacket with a round cross-sectional shape and openings, which are covered by metallic or non-metallic fabrics - preferably fine fabrics - and one closed jconically tapered end (tip) while a thread is arranged at the open opposite end, characterized by a seamless tube made of high-strength steel, continuous in its jacket Bores are made, the diameter of which corresponds at most to the distance to the neighboring bore, and that a fabric is assigned to at least the bores on the inside. 2. Filter according to claim 1, characterized in that the bores are arranged radially circumferentially at a radial and axial distance from one another are. 3. Filter according to at least one of the preceding claims, 809827/0411 ORIGINAL INSPECTED - sr- characterized in that the alignment of the holes at an angle of 15 ° to 75 ° - based on the Axis 17 - runs. 4. Filter according to at least one of the preceding claims, characterized by bores of different sizes. 5. Filter according to at least one of the preceding claims, characterized in that the tissue is tight - that is, it rests directly on the inner wall of the pipe. 6. Filter according to at least one of the preceding claims, characterized in that the fabric is designed as a cylinder and is inserted loosely. 7. Filter according to at least one of the preceding claims, characterized in that the fabric has the shape of a cup . δ. Filter according to at least one of the preceding claims, characterized in that a ring (12) is assigned to at least one end of the cylindrical fabric, which can be inserted into the pipe inside diameter (15) in a sliding fit is. .. S09877 / CH1 1 9. Filter according to at least one of the preceding claims, characterized in that the ring and / or the fabric a non-metallic sheath (rubber / plastic) is assigned or the ring made of this material consists. 10. Filter according to at least one of the preceding claims, characterized in that the tip has aligned wings (8). 11. Filter according to at least one of the preceding claims, characterized in that the angle of the wings (8) to the axis (17) between 10 ° and 60 °. 009827/0411