SK285093B6 - Sealing ring for an externally corrugated plastic pipe - Google Patents

Abstract

The sealing ring for wave plastic pipe equipped external waves in which the symmetric sealing ring is created for sealing contra second pipe (14) in which is mounted wave plastic pipe with two side relieving elements (3, 4) outgoing from basic corps (1) for reaching sides of the wives of the wave pipe (13); whereby the basic corps (1) in unloaded condition of the sealing ring is possible to enter into down of the wave of the wave pipe (13) without tension; whereby the side relieving elements (3, 4) outgoing from basic cords (1) contains inside flaps (10, 11), which can reach on the adjacent top of the wave pipe (13); and whereby central sealing (2) during the disengagement of the wave pipe (13) into second pipe (14) is avoided aside and it press adjacent the side relieving element (3) against the direction of the inserting.. The side relieving elements (3, 4) have the erase flaps (5, 6) destined to the symmetry level of the sealing ring from basic element (1) outgoing the central sealing (2) in the form disc ring is overhung outside via the erase flaps (5, 6) and relieving elements (3, 4) show external cuts in form V for creating the relieving flaps (7, 8).

Description

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 to use a sleeve to connect the 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.

A sealing ring for a plastic pipe equipped with external waves is known from US-A-5 687 976. However, the design of the support bodies according to this document does not, however, remove the requirement to exert a relatively high contact force when inserting the corrugated pipe into the sleeve.

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.

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 has a main ring-shaped seal for sealing against the second pipe, respectively. 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 essentially through the main ring-shaped gasket, which is designed as a flap seal. Against the corrugated pipe, the seal is formed by two lateral support bodies which abut against 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 which are adjacent to the main seal, forming an additional seal against the outer tube or sleeve. Furthermore, the support bodies may have a V-shaped slot 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 without tension, is loosely inserted into the wool bottom, so that the side support bodies of the gasket turn so that the supporting flaps lie on the main seal. The main gasket itself turns in the outer region by about 90 ° so that the inverted inner side of the main gasket abuts against the boundary support tab, while the opposite side of the main gasket 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 against the outer tube as well as a plurality of sealing regions on the corrugated tube, a qualitatively particularly valuable seal is produced.

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 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 side support bodies, which are approximately in the form of wings, comprise sealing flaps 10, 11, 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 to the plane of symmetry and comprises V-shaped notches 15, 16 on which the wiper flaps 5, 6 facing the sealing flaps, while the edges facing the main seal form the supporting flaps 7, 8. When the seal is at rest, V-notches are also provided 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, 11 on the sides of the wool, the support bodies 3, 4 are turned towards the main seal, so that the supporting flaps 7, 8 substantially abut the main sealing 2. It can be seen that the main sealing 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 seal on the scraper flap 5 as well as the support flap 7. In total, four lines of the seal against the outer pipe are formed. The corrugated pipe 13 is sealed against the sealing ring on the sealing flaps 10, 11, as well as by contact of the base body with the wool bottom. The high number of sealing areas provides a high sealing effect which cannot be achieved by the press seals of the prior art.

Claims (3)

PATENT CLAIMS A sealing ring for a corrugated plastic pipe, provided with external waves, in which a symmetrical sealing ring is formed to seal against a second pipe (14) into which a corrugated plastic pipe is inserted, with two lateral support bodies extending from the base body (1). (3, 4) for resting on the sides of the corrugated tube wines (13); wherein 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); wherein the lateral support bodies (3, 4) extending from the base body (1) comprise outer sealing flaps (10, 11) which can abut on an adjacent wave top of the corrugated pipe (13); and wherein the main gasket (2), when inserting the corrugated pipe (13) into the second pipe (14), skips and pushes the boundary support body (3) against the insertion direction, characterized in that the side support bodies (3, 4) have wipers the flaps (5, 6) facing the symmetry plane of the sealing ring; that the main ring (2), which extends from the base body (1), essentially in the form of a disc ring, extends radially outwards through the wiper flaps (5, 6); and that the support bodies (3, 4) have V-shaped external slits to form the support flap (7, 8). Sealing ring according to claim 1, characterized in that the outer contour of the sealing ring, starting 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 1, 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.