SK15162000A3 - Sealing ring for an externally corrugated plastic pipe - Google Patents

Abstract

The sealing ring for double-walled, corrugated plastic pipes fits into one of the grooves on the outside of the pipe. It has lips (10, 11) which face outwards and rest against the tops of the groove. A central section (2), which projects above the lips before the ring is fitted, is bent to one side when a sleeve (13) is slid over the pipe and fits against a contour (5, 6) on the inside of one of the lips.

Description

Sealing ring for plastic pipe, equipped with external waves

Technical field

The invention relates to a sealing ring for a plastic pipe equipped with external waves.

BACKGROUND OF THE INVENTION

The connection of two plastic pipes, for example sewer pipes, is generally effected by inserting a gasket into the groove-equipped neck end and inserting the second tube with its pointed end into the neck. It is also known that a sleeve is used to connect two pointed ends into which the pointed ends are inserted from both sides. The sleeve has two grooves with gaskets.

In the case of double-walled plastic pipes with external waves (so-called corrugated pipes), at present, only a connection can be used by inserting the tube-free tube sections into the sleeves. The grooves in the sleeves used in smooth-walled plastic pipes are not applicable here, since a seal cannot be achieved in this way. Instead, sealing rings are used which are inserted into one of the waves of the corrugated pipe to be inserted into the sleeve and form a seal to the sleeve.

Known seals for this purpose are formed in a mushroom-like shape and when the corrugated pipe is inserted into the sleeve, the corrugated pipe waves are compressed at the bottom. The insertion of the corrugated pipe into the sleeve must therefore be carried out with a relatively high force in order to obtain sufficient compression and sealing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved sealing ring for a plastic pipe provided with external waves which, with improved sealing quality, allows easy insertion of the corrugated pipe into the sleeve.

2. Summary of the Invention

This problem is solved by a sealing ring for a plastic pipe equipped with an outer wave (corrugated pipe), which sealing ring can be inserted into a wave of a corrugated pipe by virtue of being designed as a symmetrical sealing ring with a substantially ring-shaped ring seal. for sealing against the second pipe into which the corrugated pipe is inserted and with two lateral support bodies extending from the base body to abut on the sides of the corrugated pipe wines.

The sealing ring according to the invention is designed as a flap seal symmetrically so that it can be used in both directions. It exhibits a main ring-shaped seal for sealing against the second pipe or pipe. the sleeve as well as the two lateral support bodies for resting on the waves of the corrugated pipe. Thus, the sealing against the outer tube takes place substantially through the main ring-shaped seal, which is in the form of a flap seal. Against the corrugated pipe, the seal is formed by two lateral support bodies which abut on the tops of the wine adjacent to the bottom of the wool into which the seal is inserted.

The sealing ring according to the present invention preferably comprises a base body which, in the unloaded state of the sealing ring, is inserted substantially free of stress into the wave of the corrugated pipe. On the outside, the base body passes into the two support bodies and the main seal. The height of the base body is approximately half the total height of the gasket in the unloaded state.

The support bodies preferably have distinct sealing flaps through which the support bodies seal against the sides of the wine tops. Wiper flaps are formed on the side of the support bodies that are adjacent to the main seal, forming an additional seal against the outer tube or sleeve. Further, the support bodies may have a V-shaped cut on the outside to form an additional support flap.

When inserting a corrugated pipe provided with a sealing ring according to the invention into the sleeve, the gasket, which is unloaded in the unloaded state without tension, is loosely inserted into the wool bottom, so that the side support bodies of the gasket turn so that the supporting flaps seal. Main seal

It will turn itself about 90 ° in the outer region, so that the inverted inner side of the main seal fits against the boundary support tab, while the opposite side of the main seal causes a seal against the outer pipe.

Due to the symmetrical shape of the sealing ring, it can be used in both directions, so that the insertion direction is not to be observed. The flap design avoids the necessity to exert high compressive forces when inserting the corrugated pipe into the sleeve. By providing a plurality of sealing regions relative to the outer tube as well as a plurality of sealing regions on the corrugated tube, a particularly high quality seal is obtained.

The invention will now be described in more detail by way of example.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows the sealing ring in an unbuilt state,

Fig. 2 shows a sealing ring which is inserted into a wave of a corrugated pipe; and

Fig. 3 illustrates a sealing ring in operative condition in a downward wave of a corrugated pipe which is inserted into an outer smooth pipe, for example a sleeve.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1, the sealing ring shown comprises a basic cross-sectional body 1 of approximately the shape of an inverted bell from a solid profile, the outer contour of which approximately corresponds to the contour of the undulating wave of the corrugated pipe. On the wider side of the base body, this passes into the two lateral support bodies 3, 4, as well as the main seal 2, which is formed in the symmetry plane of the ring-shaped seal ring. The axial outer surface of the main seal is flat and forms two side edges 9, 12.

The lateral support bodies, which are approximately wing-shaped, comprise sealing flaps 10, the inner side of which extends in an arcuate manner into the base body. The outer side of the support bodies 3, 4 faces obliquely inwardly towards

-4 plane of symmetry and comprises notches 15, 16 of V shape on which the wiper flaps 5,

6, directed towards the sealing flaps, while the edges facing the main seal form the support flaps 7, 8. In the rest position of the seal, notches V are also formed between the main seal 2 and the support bodies 3, 4.

Fig. 2 shows a sealing ring according to the invention in a state in which it is inserted into a wave of a corrugated pipe. The diameter of the gasket is dimensioned so that its tension pulls it into the bottom of the wool to such an extent that the base body is still substantially free of stress in the bottom of the wool. By abutting the sealing flaps 10, H on the sides of the wave bottom, the support bodies 3, 4 are turned towards the main seal, so that the supporting flaps 7, 8 substantially abut the main seal 2. It can be seen that the main seal extends to some extent beyond the lateral supporting bodies.

When inserting the corrugated pipe 13 provided with the seal into the insertion sleeve, the main seal 2 comes into contact with the inner surface of the smooth insertion sleeve so that the state of the seal as shown in FIG. 3. The outer region of the main seal 2 is thereby turned about 90 [deg.] And now rests on the support flap 8. The support body 3 is further compressed so that the base body is pressed down so far that its volume fills the entire inner space of the wave bottom. On the side of the seal on which the main seal 2 rests on the support flap 8, a sealing effect occurs between the edge 9 of the main seal 2 and the outer pipe 14 as well as the wiper flap 6 of the support body. Seals are formed on the opposite side of the main gasket on the scraper flap 5 as well as the support flap 7. In total, there are four sealing lines with respect to the outer pipe. The corrugated pipe 13 is sealed to the sealing ring on the sealing flaps 10, U, as well as by contact of the base body with the wave bottom. The high number of sealing areas provides a high sealing effect that cannot be achieved by prior art molded seals.

-5List of reference numbers base body main gasket support body support body wiper flap wiper flap support flap support flap edge sealing flap sealing flap edge corrugated pipe sleeve notch notch

Claims (4)

PATENT CLAIMS A sealing ring for a plastic pipe, provided with outer waves (corrugated pipe), the sealing ring being insertable into a downward wave of the corrugated pipe (13), characterized in that it is formed as a symmetrical sealing ring with the main seal (2) in substantially in the form of a disc ring for sealing against the second pipe (14) into which the corrugated pipe is inserted, and with two lateral support bodies (3, 4) extending from the base body (1) to abut on the sides of the corrugated pipe (13). Sealing ring according to claim 1, characterized in that the base body (1), in the unloaded state of the sealing ring, can be inserted substantially without stress into the wave of the corrugated pipe (13), so that the lateral support bodies (3, 4) from the base body (1), comprise outer sealing flaps (10, 11) which can abut the adjacent wave top of the corrugated pipe (13) and show the sealing flap (5, 6) facing the symmetry plane of the sealing ring that 1) the protruding main seal (2) extends in a radial outward direction through the scraper flaps (5, 6) and that the main seal (2) avoids sideways when pushing the corrugated pipe (13) into the second pipe (14) and compresses the boundary support body (3) against the insertion direction. Sealing ring according to claim 1 or 2, characterized in that the outer contour of the sealing ring, extending from the sealing flaps (10, 11), essentially follows the contour of the corrugated pipe up to the base of the sealing. Sealing ring according to claim 2, characterized in that the base body (1) has a cross-sectional height which corresponds to about half of the total height of the sealing ring. -75. O-ring according to any one of the preceding claims, characterized in that the support bodies (3, 4) have V-shaped external cuts to form the support flap (7, 8).