DE1900437U - ROLLING RING SEAL. - Google Patents

Description

3.564

DR. ING. HANS LICHTI · PATENT ADVOCATE

KARLSRUHE-DURLACH · GRÖTZINGER STRASSE 61

TELEPHONE 41124

May 21, 1964 1233/64

KkSTKR WIIKIER & Co. Owner Br. P. Schenker-Winkler & Dr. R. Burkard-Schenker, Zurich 48 (Switzerland), G-eerenweg 9 and Tüffenwies 12

Nominal ring seal

The innovation relates to an Eollring seal made of rubber or flexible plastic with through a rib running along a surface line with a circular shape and a cross-section that is reinforced on one side - for example in the form of a freely falling drop - for flock socket pipes made of concrete, stone eye etc.

For connecting Gi-Iockenmuff pipes out Concrete or stoneware have been used for a long time, the rolling ring seals made of rubber or plastics

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be pushed onto the pipe end of one pipe in the form of a closed, right-fitting ring, whereupon this end of the pipe with the ring attached to the bell socket of the adjacent pipe and pushed in up to the push. The rolling ring seal is rolled on along the surface of the pipe end and pressed together on the cross-section of the annular gap between the two socket ends. To increase The compressibility and thus to facilitate the curling were these rolling rings in newer Time provided with one or more longitudinally continuous cavities. With all these rolling ring seals, which had a circular cross-section throughout to enable binrolling, occurred during binrolling often slow twisting, which led to various inconveniences. The twisted rolling ring seal opposes an increased resistance to the insertion of the pipe and on the other hand endeavors to slide the inserted pipe end out again. |

To remedy these disadvantages, which led to deficiencies and failures in installed pipelines, In recent times, rolling ring seals have been made with a cross section running along a surface line approximately isosceles triangular rib deviating from the circular shape, reinforced on one side

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Proposed cross-section, which have approximately the cross-sectional shape of a freely falling crop. These profiles have some significant advantages over the circular cross-section rolling ring seals. Such a rolling ring seal can easily be pulled open and has a firm hold on the tube due to the circumferential edge of the reinforcing rib, which prevents it from unintentionally rolling. Even if the pointed socket is conical, there is no longer any risk of unintentional rolling off, so that no additional measures need to be taken in such cases. The rolling ring seal can also be pulled open without any difficulty, since any longitudinal twisting can be detected immediately by visual inspection. the
Asymmetry of the Kollring seal means that it is much more difficult to remove a tube in the retracted state than with a seal with a circular cross-section. To achieve all of these advantages, however, it is necessary that the socket depth and gap width are precisely matched to one another. If this is not the case, the following disadvantages may arise

1. If the ratio of socket depth to The sealing ring can have a gap width after it has finished rolling on the longitudinal edge of the triangular Reinforcing rib so that the pressure acts directly on the long cross-sectional axis,

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In such Pall there are two disadvantages: a.) The sealing surface is much smaller than with a sealing ring with a circular cross-section!

b) in order to evade the pressure acting on the long cross-sectional axis, the sealing ring roll back to such a position that the pressure acts on the short cross-sectional axis.

2. Since the pressure on the long cross-sectional axis is also considerably greater during the rolling process than on the short cross-sectional axis, the bell-shaped socket that is pushed over becomes correspondingly strong loaded, leading to the risk of breakage, especially in the case of thin-walled vibration-compacted concrete pipes can lead.

The innovation is intended to solve the problem of using a rolling ring seal of the type perceived by a running along a surface line in cross-section approximately isosceles triangular rib of the Circular shape deviating from one-sided reinforced cross-section, for example from the shape of a free falling drop, for To create G-lockenrauffenrohre, in which the mentioned Disadvantages and sources of danger are reliably eliminated. According to the innovation, this task is based on such a

Rolling ring seal solved by a cavity arranged concentrically around the central longitudinal axis, the outline of which runs approximately parallel to the outer contour of the rolling ring seal, so that the apex of the rib and the this corresponding edge of the cavity lie on a plane extending through the central longitudinal axis. This in the long cross-sectional axis enlarged the outer Outline of the rolling ring seal shape-like cavity acts "with unchanged external dimensions - compared to a cavity of circular cross-section - as a cross-sectional reduction in the area of the long cross-sectional axis, so that "when rolling over the rolling ring seal no significantly increased pressure occurs over the vertex of the rib.

Several technical advantages are associated with this effect of the measure according to the innovation. The figure of the cavity ensures almost even rolling during the rolling process The pipes to be connected are not stressed significantly more than with a circular rolling ring seal A possible end position of the rolling ring seal in the rolled-up state on the apex of the reinforcement rib has no adverse consequences with regard to the size of the sealing surface and the tight fit of the sealing ring.

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The relative size of the cavity "or the thickness of the wall the rolling ring seal can be used within certain limits, depending on the general technical properties ν of the material used for production is freely selected

will.

In a preferred embodiment is within of the cavity - which in this case expediently has a larger cross section - is concentric to the central longitudinal axis arranged continuous strand made of solid material is provided, which by means of longitudinal webs connected to the wall outside of the cavity. The longitudinal webs divide the cavity into several chambers that are not in communication with each other.

Appropriately, three or four such webs are provided at the same distance from one another and are symmetrical on both sides of the plane of symmetry in which the apex of the rib and the edge of the cavity lie. The continuous strand ″ advantageously has a circular cross section.

k With this further development of the subject

the hiring is made possible, the chambers of the cavity with the same overall cross-section closer to the

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ι /

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To move the periphery of the rolling ring diaphragm. She is therefore particularly suitable for rolling ring seals made of stronger, less flexible material.

In the accompanying drawing are embodiments of the rolling ring seal according to the innovation shown and that show?

Fig. 1 shows a section of a rolling ring seal, in

simple embodiment in perspective Oblique view with a view of a cut surface j

Pig. 2 shows a similar illustration of a different embodiment.

The embodiments shown in both figures of the rolling ring seal have correspondingly the Uinrißlinie one of a cylindrical part and one seated on this part with an approximately isosceles cross section triangular rib 2, the apex 3 of which runs parallel to a surface line of the cylindrical part 1, whose Base 4 in cross section, describes an arc of curvature with the same radius of curvature as the circumference of the cylindrical part 1 and whose flanks 5 are essentially planar, formed body, similar to the cross section of a free falling water drop. Both rolling ring connections

"have a cavity 7 arranged concentrically around the central longitudinal axis 6, the outer contour of which is parallel to the outer contour of the rolling ring seal. The apex 3 of the rib 2 and the longitudinal edge 8 of the cavity lie in a cavity 7 running along the central longitudinal axis 6 the rolling ring seal shown in Figure 1, corresponding to the above explanation, the size of the cavity 7 _S "or the thickness of the wall 9 of the rolling ring seal depending on the general technical properties of the material to be used, in particular its hardness and elasticity, selected so that the rolling ring seal does not oppose too much resistance to the rolling process on the one hand, and reliable connection after rolling on the other and tightness guaranteed. The newly proposed shape and arrangement of the cavity has, compared to a circular cavity, increased flexibility at an oriented point, namely in the area of the cross-section reinforced by the rib 2 in the direction of the long cross-sectional axis between the apex 3 of the rib 2 and the central longitudinal axis 6, see above that the rolling ring seal when rolling over the apex 3 of the rib 2 exerts no appreciably higher resistance avis than in any other position. As a further part of the result, the resulting better bondability when pressure is applied to the apex 3 of the rib 2,

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that even in such - unforeseeable - unfavorable cases, when the Bollringdichtung in the occupied Band position with vertex 3 of the rib vertical on the inner surface of the bell socket or the outer surface the pointed socket rests, the pressure on the pipe walls due to the elastic deformation of the apex of the rib is reduced so far that there is neither a danger of Overloading of the pipe walls, nor the risk of the pushed-on pipe being pushed back as a result Rolling of the rolling ring seal from the apex 3 of the rib 2 "consists.

The embodiment of Figure 2 has a not insignificantly larger cavity 7 than the embodiment described above, but also has within the cavity 7 a concentric to the central longitudinal axis 6 arranged continuous in cross-section circular strand 10 made of solid material, which by means of four continuous webs 11 with the Wall 9 is integrally connected. The webs 11 are at approximately equal distances from each other and symmetrical on both sides of the by the apex 3 of the rib 2, the edge 8 of the cavity 7 and. the central longitudinal axis 6 extending symmetry plane of the rolling ring seal arranged »The cavity 7 is divided by the strand 10 and the webs 11 to a certain extent into four channels, of which three channels 7a

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of the same shape, roughly kidney-shaped, and of the same size are, while the fourth, located below the Eippe 2 Chamber 7b differs from these in shape and size.

The total volume of the chambers la., 7b formed according to this embodiment corresponds approximately to the yoIumen of the cavity 7 according to FIG. a further increased flexibility is achieved in this embodiment, which allows the use of stronger, less flexible material for the production of the Eollringdichtung «

Claims (4)

{! Α.368 167 * May 23, 1964 May 21, 1964 1233/64 S chut ζ ans pr liehe 1.) Rolling ring seal made of rubber or resilient plastics with through one along one Generating line running in cross-section approximately isosceles triangular rib deviating from the circular shape Cross-section reinforced on one side, for example in the shape of a free falling drop, for G-lock pipe made of concrete, stoneware and the like «, characterized by a concentric arranged around the central longitudinal axis Cavity (7), the TJmrißlinie approximately parallel to outer contour of the rolling ring seal runs so that the apex (3) of the rib (2) and this corresponding Edge (8) of the cavity (7) lie in one plane together with the central longitudinal axis (6). 2.) Rolling ring seal according to claim 1, characterized by a continuous strand (10) arranged concentrically to the central longitudinal axis within the cavity (7) made of solid material, which by means of continuous, the cavity (7) longitudinally dividing webs (11) with the Wall (9) is connected outside the cavity. 3.) Eollringdichtung according to claim 2, characterized in that the strand (10) is circular Has cross-section. 4.) Eollringdichtung according to claims 2 and 3, characterized in that symmetrically on both sides of the plane in which the apex (3) of the rib (2) and the edge (8) of the cavity (7) lie, each with a web (11) is arranged. 5 ·) Eollringdichtung according to any one of the preceding claims, characterized in that it is on the outside is ribbed lengthways to increase friction.