DE8900187U1 - Pressure plate for closing steel pipes - Google Patents

Description

; :.: \ \ ·:'TERRA Dr. Gustav Jenne GmbH

'...'1 j' ·■■■' 'Sch'machtenbergstrasse 18S

D-4300 &Egr;&bgr;&bgr;&bgr;&eegr; 18 tiC 02öt4/3168 - Tales 8579167

The invention relates to a clearing device for emptying steel pipes that are driven approximately horizontally into the ground and are open at the front.

In the known devices, the steel pipe is drilled out from one side with twist drills or blown out with pressurized water or compressed air using flushing heads. In another device, about 1 cm of earth sausage is removed by hand from one side of the steel pipe and then a foam ball is pressed into this cavity. The rear end of the opening is closed with a so-called pressure ring, in the middle of which a feed pipe is arranged axially, through which either water or compressed air can be fed.

Such a pressure ring consists of 1 to 2 rubber disks, the diameter of which is slightly smaller than the inner diameter of the steel pipe. These rubber disks can be pressed together using steel plates that sit on a threaded rod and can be tensioned with nuts. During this pressing process, the rubber disks are pressed outwards and thus form an airtight, watertight and pressure-resistant seal for the steel pipe.

If water is first poured into the space between the foam ball and the pressure plate and then compressed air is added, the compressed air is supported against the pressure plate and the earth sausage in front of the foam ball. As soon as the pressure force is greater than the friction between the earth sausage and the steel pipe, the earth sausage is pushed out towards the other side of the steel pipe and the steel pipe is cleared.

The method described above has the major disadvantage that the rubber discs and the steel plates of the pressure ring with their outer diameter can only be slightly smaller than the inner diameter of the steel pipe, otherwise they would not provide the airtight, watertight and pressure-resistant seal of the steel pipe.

The invention is based on the object of replacing the pressure ring described above in a simple manner and of being able to use the same structural design for steel pipes of different sizes*.

For this purpose, a filling pipe (2) with a stop (3) at one end is pushed through the inner bore of the Ranun ring (1), which is required to drive in the steel pipes (9) using horizontal rams. Behind the stop (3) there is the water addition funnel (4) and the compressed air connection (5). At the other end of the filling pipe (2) there is an external thread and a screw-on stop (o).

The ramming ring (1) has a cone on its outer circumference, which wedges itself into the inner diameter of the steel pipe <9) and thus ensures an airtight, watertight and pressure-resistant connection. This ramming ring (1) is not only required for the inventive design of the clearing device but also when driving in the steel pipes (9), even if the clearing is carried out with the aid of the known pressure ring.

The inclusion of this ram ring (1) in the end of the steel pipe (9) during the clearing process makes it possible for the same economically producible and simple filling pipe (2) to be used for a wide variety of steel pipe sizes.

According to a further feature of the invention, the stop (3) can be designed to be screwed on or plugged on, i.e. detachable.

The drawing shows an embodiment of the clearing device according to the invention in longitudinal section. In the steel pipe (9), part of the earth sausage (8) is removed and a foam ball (7) is inserted. The ramming ring (1) is connected to the steel pipe (9) via its outer cone in an airtight, watertight and pressure-tight manner. The filling pipe (2) is inserted into the ramming ring (1) up to the stop (3) and connected to the ramming ring in an airtight, watertight and pressure-tight manner using the screw stop (6).

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Pressure] on the connection (5).

Reference number

1 Ramming ring 2 Filling tube 3 attack 4 Water addition funnel 5 Compressed air connection 6 Screw stop 7
&igr; LJK, 11 α UtIII O L-WJ- J- t\.LX£^C J. 8th Earth sausage 9 Steel pipe

Claims (3)

Expectations 1. Pressure plate for closing steel pipes (9) characterized in that a filling pipe (2) is inserted through a ram ring (1) with a conical outer surface and a conical inner bore and is impermeably connected via stops (3) and (6). 2. Printing plate according to claim 1, characterized in that a water addition funnel (4) and/or a compressed air connection (5) is arranged on the filling pipe (2). 3. Pressure plate according to claim 1, characterized in that circular segment end faces or conical formations are arranged on the stops (3) and/or (6), which ensure the central seating of the filling tube (2) in the ram ring (1).