DE8520355U1 - Pulling head for multiple plastic pipes - Google Patents

Description

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Pulling head for multiple plastic pipes

Cables, especially telecommunication cables, are often laid out underground Laying plastic pipes. These plastic pipes have for the most part Share a relatively large inner diameter (approx. 100 mm). The technical advancement of telecommunication cables led despite considerably larger transmission capacities result in noticeably smaller outer diameters of the cables. Because of the smaller & u outside diameter of the Cable offered itself for various reasons, as mentioned above Laying several cables in plastic pipes.

It is undesirable here, however, that several cables in the plastic pipes are laid next to each other with direct mutual contact. This requirement led to the development of plastic multiple pipes. Under this The term is understood to mean plastic pipes of the same or different diameter bundled by suitable connecting elements. These multiple pipes before they are covered with cables, pulled into the plastic pipes mentioned at the beginning with a large inner diameter.

The known and commercially available ones are used to pull in the multiple pipes Pulling stocking, the pulling eye of which is connected to a winch rope. The pulling stocking does not adhere adequately to the Multiple pipes, because they are too flexible in the radial direction and only insufficiently withstand the pressing force of the pulling stocking. For this reason there is a risk that the pulling sock will be pulled off by the winch rope when the multiple pipes are pulled into the plastic pipe. Additional and Time-consuming assembly work (laying work) is the result.

The subject of the invention - pulling head for J'unjtatoff multiple tubes - has these disadvantages do not have and can be connected in a simple manner with remarkable tensile strength to the multiple tubes.

Figure 1 shows the pulling head in longitudinal section (see arrows in Figure 2). Figure 2 shows the top view.

The assembly of the pulling head is done in such a way that the preferably four Clamping elements (&) of the same or different diameter in the

The corresponding plastic multiple pipes (8) are guided (inserted) * The clamping elements (2) are provided with several slots along the largest part of their length from the free end «In the lower conical bore part of the clamping elements (2) there is a clamping cone each (6) <With the help of the screws (4) the clamping cones (6) located in the clamping elements (.2) are axially in pulled the conical bore, whereby the longitudinally slotted clamping elements (2) are spread radially and increase their diameter. This claws the outer corrugated surface of the clamping elements (2) in the inner wall of the plastic multiple tubes (8). The clamping cones (6) are each against rotation secured by the retaining pins (7). The retaining pins (7) are guided in the longitudinal slots of the clamping elements (2).

The tensioning disc (1) takes the tensioning elements (2) in corresponding recesses (9) on. The tensioning elements (2) are held in place in the tension disk (1) by the locking screws (3). The towing eye is in the center of the pulling disc (1) (5) arranged »which with the winch rope for pulling in the multiple plastic pipes connected.

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Claims (5)

1. Pulling head for multiple plastic pipes, characterized in that preferably several tensioning elements (2) slotted lengthways from the free end over the major part of their length in a pulling disc (1) are arranged and locked (3). 2. Pulling head for multiple plastic pipes, characterized in that the Clamping elements (2) have an outer corrugated surface and a partly cylindrical and partly conical bore. 3. Pulling head for multiple plastic pipes, characterized in that in the conical bores of the clamping elements (2) each have a clamping cone (6) mounted and which each with their threaded hole (10) the Pick up screws (4). 4. Pulling head for multiple plastic pipes, characterized in that the Clamping cones (6) are provided with retaining pins (7) which fit into the longitudinal slots the clamping torques (2) protrude. 5. Pulling head for multiple plastic pipes, characterized in that a The drawbar eye (5) is mounted centrally on the outside of the drawbar (1). Il Hit Il Il llilllillil * ill fill Il Il I · 4 Il I I II * t · « ■ i I I I I · · > Il III I I · · · UiKIIiI Il Il <«· ···