DE1250700B - - Google Patents

Description

GERMAN Wmsfm PATENT OFFICE German class: 47 f-22/10

EXIT

... file drawing-: L53473XII / 47f

1 250 700 filing date: April 30th. 1966 _BC

Delivery day: 2 L Septerriber 1967

Bie invention refers to a check rolling ring for sealing socket pipes _s made of plastic, plästisch-elästischem or elastic material and has a cross section of circular or anriäheriid circular basic shape with gradient in the Umfangsrichtürig of the ring recess.

The known rolling ring of this type has two incisions running in the circumferential direction of the ring through which flaps are formed diagonally to one another on the ring cross-section. These lobes are used to attach and align the roller rims on the tail and the socket end of the tube. After this ring has been rolled up, the lobes rest on the ring in such a way that approximately again results in the shape of a rolled-up O-ring

Furthermore, rolling rings are known, the radial slots extending over the circumference of the ring exhibit. This is intended to increase the resilience of the ring cross-section.

According to the invention, only a single one in the circumferential direction is used in the rolling ring of the type mentioned at the beginning extending incision is provided, which is designed as a groove that has the shape of a sector with einu Apex angle of at least 70 °, preferably about 90 °, at most. Has 110 °. as

The groove is used as in the known forming tabs provided with circumferential incisions Rolling rings for planting and aligning the rolling ring either at the spigot end or at the socket end of the pipe. The sector-shaped design of the groove results in easy placement and Align the ring at the end of the pipe and a strong contact surface. When rolling in the ring is opposite such rings, which only have radial slots, ensures that the ring is deep enough into the socket connection 'is rolled up. When the pipe ends are pushed into one another, as a result of the invention Cross-sectional shape of the ring initially overcome a somewhat greater resistance. Since this would also act when pulling the pipes apart, the rolling ring is thus able to adjust the position of the pipes to fix better to each other in the axial direction. In the case of the known rolling rings, there is particularly if they have a strong elastic component, the risk that after insertion as a result of the elastic Forces in the ring at least partially pushed the inserted pipe back out of the socket will. In the embodiment according to the invention, this is due to the cross-sectional shape of the ring avoided. The advantage over rolling rings, which only have radial incisions, results with the subject matter of the invention also the possibility

Roller seal for socket pipe connections

Applicant: f Lechler building protection chemistry K. G., Stuttgärt-N, Krorienstrasse; 50 Behaved as an inventor: Gerhard MuBhafeii _s Gerlingen (Württ.)

ability of the attachment of the rolling ring on one of the pipe ends and the alignment of the rolling ring on the Pipe end,

as a result of the loss of material resulting from the sector-shaped groove, larger through-holes. diameter of the basic cross-section shape can be selected. As a result, with the same contact pressure of the rolling ring larger gap width tolerances bridged on the pipe walls and larger axial sealing surfaces be achieved.

The invention is explained below with reference to drawings, for example.

Fig. 1 to 6 show various rolling rings in cross section, in which the sector-shaped grooves are arranged at different circumferential locations; ;

A b b. 4 and 5 represent sector-shaped grooves with additional extensions in the area of their apex dar;

A b b. 6 shows a basic cross-sectional shape that deviates from the circular shape;

A b b. 7 shows the pipe ends to be connected before insertion, with the rolling ring already on the Socket end is placed;

Fig. 8 shows the socket pipe connection shown in Fig. 7 in the inserted state of the pipe ends; '

A b b. 9 shows a socket pipe connection before the pipe ends are plugged into one another, in which the rolling ring is placed on the spigot end.

In the A b b. 1 to 6 is the circular or approximately circular basic cross-sectional shape of the rolling rings shown, this basic shape in the area of the grooves arranged in the rolling ring by dash-dotted lines Lines is added.

To produce the socket connection, the sealing ring can either be attached to the inner socket edge of the already laid pipe (see Fig. 7) or at the spigot end of the pipe to be connected (see A b b; 9)

709 648/178

Claims (1)

be created. The ring is thus fixed at right angles to the pipe axis and cannot slide away even when the pipes are wet. If the ring is attached to the socket, one with a groove running on the outside is chosen (see Fig. 1). If it is to be clamped onto the spigot end, the ring with a groove running on the inside is used (see Fig. 2). When the ring is attached, it is twisted in such a way that it rests under tension in the socket (see A b b 7) or in the other case on the spigot end of the pipe (see A b b 9). Rings with a laterally running groove (A b b. 3) are used when working with adhesive or with rings made of plastic material. The cross-sectional shape according to the invention permits relatively large strand diameters without excessive pressures occurring. Large tolerances in the socket gap are thus easily mastered. The required amount of material, which has to be pressed into the socket gap with the sealing ring, can be determined by calculation so that the strand diameter can easily be determined. Because of the large diameter of the strand and the position of the ring before it is pressed in (cf. A b b. 7 and 9), the ring is not rolled up as with the rolling ring, but rather rolled in (cf. A b b. 8). The cross-sectional shape of the strand according to A b b. 1, 2 and 3 are to be used for rings made of plastic or plastic-elastic material. In the case of elastic material or plastic-elastic material with a strong elastic component, the groove is expediently widened at its apex as shown in Fig. 4 or 5, in order to facilitate the rolling in of the ring and to largely suppress the disturbing stresses in the cross-section. Patent claims: 1. Rolling ring for sealing socket pipes, which consists of plastic, plastic-elastic or elastic material and has a cross section of circular or approximately circular Grundfonn with incision extending in the circumferential direction of the ring, characterized in that a single incision is provided as a groove is formed, which, at most Ilo ⁰ has the shape of a sector with an apex angle of at least 70 °, preferably 90 °. 2; Rolling ring according to claim 1, characterized in that the groove has an additional one in its apex Extension in round or rectangular shape (Fig. 4 and 5). Considered publications:
Austrian Patent No. 236175;
French patent specification No. 1397 668,
1244780;
British Patent No. 788,388;
U.S. Patent No. 3,107,922. 1 sheet of drawings 709 648/178 9.67 & Bundesdruckerei Berlin