DE7826221U1 - DEVICE FOR SEALING THE INTERMEDIATE PRESSURE STATION IN THE UNDERGROUND CONSTRUCTION - Google Patents

Description

I Dipwng. HORST WALTHER: Ci · "- ² X patent attorney

I, postal check account. 1493 59-6Ο2 Ffm, 35OO Kassel

έ Stadtsparkasse Kassel 33-183 Heinrich-Helne-Straße

<V 'at the corner of Frankfurter Strasse

Λ Raiffelsenbank Kassel 6573355 Telephone Ο561 / 21235

"23.08.197 asl / m

, 768/9153

; j. Company F. &. N.KrDnibus GmbH & Co., KE

: Malsburgstrasse 'Ik, 35DD Kassel

"Device for sealing the Zuischenpreßstation in underground mining "

\ - '~ The invention relates to a device for sealing the Zui-

: press station in underground mining, concentric to the

spaced jacking pipes a casing pipe and a seal arranged between the jacking pipe and casing pipe are provided.

When manufacturing υοη pipelines, channels, or tunnels It is well known that underground tunnels are worked in such a way that the individual jacking pipes are gradually advanced with the help of hydraulic presses. The hydraulic press is supported between the jacking pipes so that there is a distance between these two jacking pipes.

7826221 04.0179

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So that no groundwater can penetrate the underground drive line, are the two propulsion pipes - between which dis hydraulic Presses are - υαπ a concentric to the Uortriebsphren Surrounding arranged casing pipe, which lies loosely with a certain distance on the jacking pipes.

This ZuiischenpreBstatian must now be sealed in detail will; because groundwater could penetrate through the annular gap between the jacket pipe and the propulsion pipe.

For this purpose, a squeeze ring is provided in a manner known per se. However, this squeeze ring is subject to the prepressing work considerable stresses that lead to the destruction of the pinch ring in a relatively short time. The wealth of it is that a new pinch ring must be used, which is associated with a considerable expenditure of time.

The invention is based on the object of providing a device for To create sealing of the intermediate pressing station in underground mining and to train this device in such a way that it can be used during the tunneling work is less burdened and therefore the renewal of Makes sealing in longer periods of time necessary.

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7826221 01/04/79

This is achieved according to the invention in that the seal consists of several sealing rings and that the sealing rings together with the jacket pipe and the jacking pipe chambers which are filled with lubricant.

It is thereby achieved that during the advance of the Uortriebspipes with the help of the hydraulic presses and the resulting ones Entrainment of the jacket pipe, the sealing rings move in a lubricant, uiodurchen resulting from the movement Friction is reduced.

In the drawing is an example embodiment of the Invention shown.

I I

1 to 3 show the intermediate pressing station in individual work phases;

FIG. K shows, on an enlarged scale, part of the intermediate pressing station with the seal; FIG.

Fig. 5 shows the sealing of the intermediate pressing station on an enlarged scale.

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The overall designated 11 Zuiischenpreßstation consists of the jacking pipes 1 and 2 as well as the casing pipe 3, which is arranged concentrically to the jacking pipes and which surrounds these two jacking pipes at a small distance. Hydraulic presses k are switched on between the jacking pipes 1 and 2. 5 with a wooden pinch ring and 6 with a pressure distribution ring.

To seal the gap between the jacket pipe 3 and the Propulsion tubes 1 and 2 are provided with seals 12 and 12a.

When advancing the word propulsion pipe 1 in the propulsion direction 13 üjird the seal 12a is particularly stressed, because there that Jacket pipe slides over the sealing elements.

2 shows the position of the jacket pipe 3 after the propulsion pipe 1 has been advanced.

Fig. 3 shows the position of the jacking pipes 1 and 2 after the jacking pipe 2 has been advanced in turn.

As dis Fig. H and 5 show in detail, the seal consists of several sealing rings 9a, 9b, 9c; These three sealing rings together with the jacket pipe and the jacking pipe form closed chambers 8c. These chambers are filled with lubricant. The filling of the chambers

7826221 01/04/79

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• A 's "-

* Takes place via the lines Ba.

") This makes it clear that during the propulsion movement of the forward

; | drive tube 1 and the resulting entrainment of the jacket

pipe 3 the friction between the jacket pipe and the sealing

jf wrestle 9a, 9b, 9c due to the lubricant substantially \ jet-

is reduced.

? - ■ The sealing ringsE 9a, 9b, 9c can be made on a special basis

Steel ring B arranged on the jacking pipe rest.

During the Uorttriebsbewegung it is ensured that the Chambers Bc are constantly filled with lubricant.

With 1D a steel guide ring is referred to, which in itself known Uleise has the task of possibly occurring radially Absorb forces.

Bentonite can be used via line 7 in a manner known per se are fed.

- Expectations -

7826221 01/04/79

Claims (2)

Expectations 1. Device for sealing the Zuischenpreßatation in Underground mining, in which a casing pipe and a seals are provided between the jacking pipe and casing pipe, characterized in that the seal (12 or 12a) consists of several sealing rings (9a, 9b, 9c) and the sealing rings together with the jacket pipe and the jacking pipe chambers (8c) which are filled with lubricant. 2. Device for sealing the Zuiiachenpreßstation in underground construction according to claim 1, characterized in that lines (Ba) are provided in the jacking pipe, Via which the lubricant is supplied to the chambers (Bc) will.