DE1927991U - EXTENSION PIPE FOR EXTENDING THE FILTER PIPES IN LOWERING SYSTEMS FOR GROUNDWATER MAINTENANCE. - Google Patents

Description

Extension pipe for extending the middle pipes in lowering systems for G-round water retention

The invention and hiring relates to an attachment tube, which is equipped with connection threads at both ends, as a component the pipeline for the extension of the tilter tubes in lowering systems for groundwater maintenance.

The use of extension tubes to extend the filter tubes is known for filter wells and lowering systems for maintaining quarry water It is well known that such well filter lowering systems are especially Used with great success in coarsely permeable soils and in fine sand-bearing soils, these systems are used as vacuum groundwater lowering systems At the same time, the parent pipes are inserted into the Subgrade, i.e. the soil is flushed in and, after removal of the flushing lance, the extension tubes are placed on the remaining! These extension tubes are used to extend and they form those pipe sections that carry the sucked in groundwater Via the intermediate pieces and the suction and pressure hoses to the Route the collecting pipe and the discharge line.

The previously known attachment tubes are equally strong and equally thick in their tube wall over their entire length and at both drilling ends connection threads are arranged. In order to be able to connect the attachment pipes with the rest of the suction line or pressure line either as intermediate pieces drill sleeves are used, or else At one end of the previous or following drilling section, widenings must go beyond the diameter of the pipe to be present »live these disadvantages, it has also been shown that the previously known Eohr versions are too heavy in terms of weight. This is because for attaching the connecting thread to the Pipe ends must have a certain wall thickness of the pipe jacket, otherwise, after cutting or rolling up the thread, the remaining bore wall becomes too weak and too thin.

According to the invention and the furnace, which is based on the known attachment tubes, the aforementioned disadvantages are now to be avoided and it is therefore her task to G-round, the top tubes BQ to shape that with simultaneous weight loss the application of the connection threads without weakening the stability of the

-2-

Pipe ends can be done.

This is achieved according to the invention in that the one-piece Attachment tube at its two connecting ends an accumulation of material produced by pressing or upsetting, in lorm the seamless Compared to the rest of the pipe body, the pipe wall is reinforced. The pipe ends are in the transition from the normal-walled pipe part slightly cranked towards the upset, reinforced pipe ends The connection threads are on or in the upset, reinforced ones Walls of the two pipe ends attached.

So while with the previously known extension tubes tubes with a A relatively strong jacket had to be used in order to have a sufficient wall thickness at the pipe ends when the thread was cut pipes with a weaker pipe jacket can now be used in the case of thin-walled pipes, sufficient wall thicknesses after the thread has been applied and there is no risk of the connection ends there As a result, the weight of the extension tubes is reduced and also through the use of thin-walled tubes with the same success an economic advantage and benefit achieved through cost savings.

connecting the extension pipes to the other pipe sections or the filter pipes, it is advantageous to use one end of the pipe to screw on a pipe socket provided with an internal thread.

An embodiment according to the hiring and invention is in the attached drawing shows:

3? Ig.1 the schematic representation of the pipe body during upsetting a pipe end and

Pig · 2 shows a vertical section through the pipe body and the pipe end with indicated pipe socket.

According to the price increase, the one-piece attachment pipe 1 is attached to his Ends 2 by suitable tools 6 and 7 in the directions of the arrows

1 2

x and χ compressed. This schematic representation is shown in fig, 1 reproduced.

By this pressing or upsetting, as shown in Mg.1 receives the attachment tube 1 at its two ends 2, the in lig.2 reproduced form "It can be seen that the tubular body" 1 of its l _o rmalwandung at the pipe ends 2 by accumulation of material is reinforced, with a slight offset in the transition.

Although the inner diameter 8 of the tube 1 is upset to the Tube ends 2 slightly reduced in size, but this is not a disadvantage, since the offset creates a smooth transition. From the illustration of Figure 2 it can be clearly seen that in the Upset pipe ends 2 the external thread 3 without difficulty can be cut or rolled up without risk that, for example, the remaining ductwork becomes too weak »This lies in it the special Yorteil the! price increase, that the upset pipe ends 2 retain a sufficiently strong and undamaged pipe wall even after the thread 3 has been cut. The component 4 is indicative a pipe socket, which with an 'internal thread 5 optionally can be screwed onto one of the upset pipe ends 2 of the attachment pipe 1

Claims (1)

Expectations 1. On top tube, which at "both ends with connecting threads is equipped as part of the pipeline for the extension the filter pipes "at A" sinking systems for G-round water retention, this shows that that the one-piece attachment tube (1) at both of its connecting ends an accumulation of material produced by pressing or upsetting in 3? form the seamless compared to the rest of the ear body has reinforced pipe wall (2). 2 · attachment tube to A _n claim 1., characterized gekennzeichne t, that the in-piercing "transition from normalwandigen Eohrleil (1) is slightly cranked to the upset reinforced drilling (2) are designed. 3 · Extension tube according to claims 1 and 2, characterized marked that the connection thread (3) on or in the accumulated reinforced walls of the "two" Pipe ends are attached. 4 · Attachment tube according to claims 1 to 3 »thereby marked that there is an external thread on both pipe ends (3) is attached and a socket with an internal thread is screwed onto one end of the drill.