DE2840742A1 - Steel pipe end edge protector - has conical part with different length ribs fitting inside pipe - Google Patents

Abstract

The pipe end protector is made from elastic plastic material. It is readily fitted to the pipe and firmly retained when the pipe is transported. It has a U-shaped cross-section, the limbs of the U embracing the wall of the pipe. The outer U-limb lies close to the outer surface of the pipe. The inner U-limb narrows conically in the direction of the pipe axis. The side of this limb facing the pipe inner wall has several spaced ribs of different diameters. At least one rib fits closely against the inner wall of the pipe.

Description

Edge protection for pipe ends "

The invention relates to an edge protector made of elastic plastic for the ends of steel pipes, which has a U-shaped cross-section and with the pipe wall encloses the two legs, the outer leg being close to the outer surface of the pipe is present.

Protection rings for pipe ends are available in various designs known. For example, DE-PS 12 36 880 describes one with a collar The ring that covers the tube face, is slit lengthways and looks like a string ring is inserted into the pipe. A similar longitudinally slotted ring comes from the DE-OS 19 12 803, the ends of which in the pipe interior through a ring against the inner wall Pressing, detachable machine element, e.g. connected to one another by a wedge are. DE-OS 14 75 604 includes a pipe end cap made of elastic under pressure self-sealing plastic with a the pipe end freely overlapping the outside edge part and an inner plug part, the 8 I press against the inner wall of the pipe with a protruding edge.

In these known devices there is the disadvantage that they either are awkward to attach to the pipe end or fall off when the pipes are transported can.

The invention has set itself the task of an edge protection create, the pipe ends reliably protects against damage, in a simple manner can be applied and during transport the pipe immovably firmly on the pipe ends sits.

The problem is solved with an edge protector as described in the claims is shown. This also solves the problem of protecting the To protect the inside of the pipe against dirt or moisture.

In the drawings, an embodiment of the invention is shown, namely show: FIG. 1 a longitudinal section through the one placed on the pipe end Edge protection, Fig. 2 shows a cross section through the upper part of the edge protection, 3 shows a cross section through its lower part and FIG. 4 in perspective Representation a view of the cut pipe end.

The edge protector, which is U-shaped in longitudinal section and pushed over the pipe end 1 lies with its outer leg 2 close to the outer wall of the pipe. Be more inner Leg 3 tapers conically in the direction of the pipe axis and it points to its The outer surface has the annular ribs 4, 5 and 6. These are at a distance from each other arranged. Their outside diameter increases in the direction of the pipe axis. According to the graphic Representations puts the rib 5 straight to the inner wall of the pipe, while the Rib 6 is already pressed against the inner wall with a press fit. Due to the different Designing the rib diameter is achieved the purpose of having an edge protection certain Dimension can be used for different pipe wall thicknesses.

On its inner surface, the leg 3 has a series of ring-shaped, spaced apart projections 7. According to the conical The tapering of the inner leg 3 also reduces the diameter of these projections in the direction of the pipe axis. They serve the purpose of receiving the circular plate 8, which protects the pipe against the ingress of dirt. This plate is made by the end of the tube is introduced until it is an interference fit from one of the projections 7 is held.

In the area of the end face of the pipe, the edge protector has the bead-like shape Reinforcement 9, in the interior of which the air chambers 10 of different shapes are incorporated. With the tightening strap 11, the outer leg 2 is firmly attached to the Outer pipe surface pressed.

The edge protection can in a known manner (DE-OS 22 54 911) by extruding a thermoplastic material in the form of a sealing strip be made in any length, which is profiled according to the invention is. A piece can be cut off in a simple manner from such a strand whose length corresponds to the respective pipe diameter and then ring-shaped pushed onto the pipe end and immovably fixed with the tension band 11 with the Pipe is connected.

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Claims (5)

Claims 1. Edge protection made of elastic plastic for the Ends of steel pipes that have a U-shaped cross-section and with both Legs enclosing the pipe wall, the outer leg being close to the outer surface of the pipe rests, characterized in that the inner leg (3) extends in the direction of the Tube axis tapers conically and several on its side facing the tube inner wall spaced apart annular ribs (4, 5, 6) with different Has diameters, of which at least one rib is sealingly seated on the Supports the inner wall of the pipe. 2. Edge protection according to claim 1, characterized in that the inner surface of the inner leg (3) several spaced apart annular Has projections (7) which are used for sealingly holding a pipe that closes the interior of the pipe Cover plate (8) are used. 3. Edge protection according to claims 1 and 2, characterized in that that the part (9) covering the end face of the tube is reinforced in the manner of a bead and air chambers (10). 4. Edge protection according to claims 1 to 3, characterized in that that the outer leg (2) is enclosed by a tension band (11). 5. Edge protection according to claims 1 to 3, characterized in that that it is formed from a linearly extruded profile made of thermoplastic material is cut according to the pipe outer diameter and over the pipe end is pushed.