DE3238494A1 - Centring socket for an elastic rolling ring, for sealing socket pipe connections - Google Patents

Abstract

An elastic rolling ring, which is arranged in a centring socket before installation, is used for sealing socket pipe connections which consist, in particular, of mineral materials. This centring socket engages with one or more parts over the socket outer wall and/or the outer wall of the tip end. In order that adequate centring of the rolling ring which is arranged in the centring socket is achieved even in the case of those socket pipes which may have relatively large tolerances on their radial socket diameters and diameters at the tip end, these engaging parts of the centring socket have an at least approximately conical shape and/or radially deformable sections which, in addition to providing adequate centring of the rolling ring, are able to provide radial compensation for diameter tolerances in the socket pipes to be installed and hence to bring both pipes into a coaxial position with respect to one another, at least until the start of installation. In this way, even in the case of difficult building site conditions, installation errors can be avoided and reliable sealing of socket pipe connections which have relatively large radial socket gap tolerances can be achieved without problems by means of cost-effective rolling rings.

Description

Centering socket for an elastic rolling ring for sealing

of socket-pipe connections of socket-pipe connections The invention relates to a centering mount for an elastic rolling ring with an approximately round Basic or effective cross-section for sealing socket pipe connections, # the in its pre-assembly position predominantly in the radially outer part of its cross-sectional circumference of the one manufactured independently of the sleeve and not firmly connected to it Centering includes and from this axially in the sleeve of a pipe assembly Pipe, which consists in particular of mineral materials, is rolled up, the rolling ring at the latest at the start of assembly with more than half of the axial Extension of its pre-assembly cross-section axially in front of and with its outer jacket is directly on or just in front of the socket end wall and / or the inner edge of the socket, and that one or more parts of the centering mount on the socket and / or spigot end outer wall overlap.

Socket pipe connections of various types of pipes, especially for waste water draining gravity lines (e.g.

from stoneware pipes DIN 1230, part 1, edition 9/79; from concrete pipes DIN 4032 and DIN 4035) are still partly used today, despite the advance of most of them Plug-in sleeves prefabricated in the pipe manufacturing plant, in more or less large sizes Scope mainly for cost reasons with rolling rings with a circular base or effective cross-section sealed according to DIN 4060, part 1. In addition to the correct pre-assembly of the rolling ring, at least on one of the two socket pipes this results when the two pipes are installed Problem of achieving the most precise possible centric position of the two socket pipes to each other so that the rolling ring is in its correct final assembly position all around after assembly occupies in the socket pipe joint. The two tubes get a little too much eccentric mounted, there is a risk that the rolling ring will not hit the Socket pipe connection rolls up, and that this is therefore not properly sealed will. The centric alignment of the two socket pipes largely depends on the Care and the craftsmanship of the pipelayer, taking into account the narrow pipe trench conditions are not always adequately guaranteed are. For this reason, in many cases, compared to rolling rings, it becomes significant Preference is given to more expensive but self-centering push-in sleeves. Come in addition nor that with certain socket pipe connections, e.g.

for those of clay pipes according to DIN 1230, part 1, edition 9/79, DN 100 - 200, due to the permissible spigot end and socket tolerances, deformations of the rolling ring of a little more than 50 of its original ring thickness can occur. In order to even mount a rolling ring according to DIN 4060, Part 1, in such cases it is necessary that the center of gravity of the pre-assembled rolling ring be within the limits of the smallest permissible socket gap (cf.

DIN 1230, part 1, edition 9/79, p. 12 "Explanations"). Such a one The position of a rolling ring with a round cross-section is identical to the previous pre-assembly of the It is known that rolling ring on the outer wall of the cylindrical spigot end cannot be achieved.

There are a number of rolling ring cross-sections known in which the Rolling ring by means of axially wide adhesive lips or the like on the spigot end or on the inner edge of the socket is pre-assembled, whereby the center of gravity of the rolling ring when dimensioned accordingly the circumferential length of the rolling ring compared to the previous one directly on the outer wall of the spigot end pre-assembled rolling rings are lowered radially by several millimeters to the pipe axis and thus to lie in the area of the smallest permissible socket gap comes. With these rolling rings, which are mostly highly asymmetrical in cross-section there is a very easy risk of incorrect and mostly too loose pre-assembly, which then usually leads to a defective socket pipe seal. But also the problem of the sufficiently accurate centric assembly of the to be connected Socket pipe is far from satisfactory with this type of rolling rings Dimensions solved.

(E.g. rolling rings with the official test marks PA-I 2050, PA-I 2164, PA-I 2952 and PA-I 2954 of the Institute for Structural Engineering, Reichpietschufer 72 - 76, 1000 Berlin 30).

Attempts have therefore been made for many years to solve the problem of the simple and safe assembly of pipes, their socket connections by means of inexpensive Rolling rings should be sealed by using - if possible simultaneously pre-centering the spigot end going into the socket - rolling ring mountings that were already attached in or on the socket at the pipe manufacturer's works, to solve. However, such rolling ring mountings are hardly cheaper, in fact even more so more expensive than those for the same types of pipe, such as clay pipes, today used push-in sleeves. These rolling ring mountings are therefore from today these, which have a few additional advantages, are prefabricated at the pipe works Push-in sleeve seals technically and economically long out of date (e.g .: BR-PS 537 i84 and 551 327, BE-PS 553 324, DE-OS 19 19 549).

To a centric insertion of spigot ends, on which a rolling ring was preassembled, and around its gradual strong deformation of up to 50 and to facilitate more percent with smooth cylindrical sleeves or even to do so in the first place enable, it is also known to place a guide sleeve centrally on the sleeve, which by means of a radially inwardly extending collar on the 'face of the Sleeve supports, from where it axially away from the sleeve into an elongated funnel-shaped Extension passes into which the spigot end provided with the preassembled rolling ring is pushed in. In order to limit the insertion depth, the spigot points here a radially outwardly protruding stop ring through which the rolling movement of the rolling ring and thus the further retraction of the spigot into the socket is stopped will. Since with different types of pipes the outer diameter of the pipe sockets is either not specified at all or, e.g. for stoneware pipes DIN 1230, part 1, Edition 9/79, DN 100 - 200, only given with maximum values are - where, for example, the outside diameter of the socket is already around for DN 200 vitrified clay pipes This type of sleeve-overlapping guide sleeves may differ by up to 27 mm due to the lack of centering ability on the socket in most types of pipes, which are still used today are mainly or at least partially sealed with rolling rings, not usable. In addition, the axial socket depth in these types of pipe is so short that a Rolling ring, which is already funnel-shaped at the several centimeters in front of the socket Extension of the guide sleeve begins to roll, either not at all or only would partly get into the socket gap. His curling motion would be in this Fall due to the premature striking of the spigot with the socket face of the previous one Pipe stopped prematurely, and that for a secure sealing of the socket pipe connection required, approximately axial middle position of the rolling ring in the socket on none Case reached (DE-OS 17 50 505).

The invention is based on the object of using the known elastic rolling rings with an approximately round base or. Cross section by means of to improve a relatively simple and inexpensive centering so that the correct pre-assembly of the rolling ring and the sufficiently centric assembly of Socket pipes, which may also have relatively short axially dimensioned socket depths and at their Sleeves and / or spigot ends have relatively large radial diameter tolerances, in the narrow pipe trench practically flawless and therefore even by inexperienced pipe layers can be carried out functionally reliable, and that the rolling ring is also in the case of socket gap widths, which occasionally due to the permissible radial diameter tolerances of their sealing surfaces Rolling ring deformations of 50% and possibly several percentage points higher make necessary, can still be installed properly and securely in a simple manner.

These tasks are achieved by means of the centering mount according to the invention solved by the characterizing features of claim 1.

To ensure a secure sealing of the socket pipe connection even with conical Shaping of the part or parts extending over the socket outer wall To achieve the centering, a development of the invention provides the characterizing Features of claim 2 for application.

If the centering mount with several parts on the socket and / or Spike end outer wall overlaps, the required sufficient centering according to another embodiment of the invention is best achieved in that the characteristic Features of claim 3 in the construction of the centering into account Find.

The advantages that can be achieved with the invention are, in particular, that a simpler cross-section and therefore also when using cellular rubber easy to produce rolling ring by means of a likewise inexpensive to manufacture, centering mount, preferably made of a harder plastic material, into which the rolling ring is expediently already in the factory of the centering mount or

of the rolling ring is used, even under the most difficult construction site conditions can be preassembled in the simplest way in a sufficiently central position. In the end provide the parts of the spigot and / or spigot outer wall Centering mount for the required secure centric assembly, even with such Socket pipes that have relatively large radial socket and / or tip end tolerances allowed, whereby at the same time that for a perfect sealing of the socket pipe connection necessary, all-round uniform rolling of the rolling ring into its ideal final assembly position is reliably guaranteed in the axial central area of the sleeve. Also suitable the centering socket according to the invention is especially suitable for socket pipe connections, where due to the permissible radial diameter tolerances of their the socket gap limiting sealing surfaces rolling ring deformations of 50% and a few percentage points above that, and / or where compared to the required, relative big ring thick, relatively short axial socket depths (such as e.g. for vitrified clay pipes DIN 1230, part 1, edition 9/79, DN 100 - 200) are.

It shows - each in a partial cross section - the exemplary embodiments in Fig. 1 and Fig. 2 a centering mount and in its preassembly position therein arranged rolling ring with overlapping on the socket and spigot end outer wall conical or

radially deformable centering parts of the centering mount and FIG. 3 and FIG. 4 shows a similar centering socket with a rolling ring as in the preceding ones Fig., But with radially deformable ones that only extend over the outer wall of the socket Centering parts of the centering socket.

In Fig. 1, the rolling ring 1 is in its pre-assembly position in a Centering mount 2, which consists of a harder and at least somewhat elastically deformable Consists of plastic material. One on the spigot outer wall 3 overlapping, from a radially movable tongue 4 of the centering mount 2 is located radially clamping, but axially slidable for the spigot 5 during assembly, on the Spigot end outer wall 3. Together with at least one, but better two others such radially movable tongues 4, which are at approximately the same distance from each other arranged on the circumference of the centering mount 2, in FIG. 1 for reasons of space and simplicity but are no longer shown, this tongue 4 ensures at the spigot end 5, which is here normally has the largest permissible outer diameter radially, for a sufficient central position of the centering mount 2 and thus of the rolling ring 1 for not shown here Pipe axis of the spigot end 5. Another, on the sleeve outer wall 6 overlapping Part of the centering mount 2 has a conical shape to the pipe axis and in the direction of the rolling ring 1 towards radially narrowing course 7, which by means of a radially extending short Transition 8 is arranged all around the circumference of the centering mount 2. In Fig. 1 has the sleeve outer wall 6 a normally still permissible, but relatively large plus tolerance theirs radial diameter, so that the front outer edge 9 of the sleeve 10 in the radial outer area of the conical course 7 of the sleeve outer wall 6 overlapping Part of the centering 2 comes to rest. At the latest at the start of assembly, the Centering mount 2 by axial pressure due to the conicity of the radially to Pipe axis towards narrowing course 7 of their on the sleeve outer wall 6 overlapping Partly brought into a sufficiently central position to the sleeve 10, whereby the in the centering mount 2 arranged rolling ring t assumes the same position. That I now both the spigot 5 of the pipe to be assembled and the socket 10 of the Pipe that has already been laid in a central position to the centering socket 2 and thus to the rolling ring 1 arranged in it, this inevitably results also a coaxial position of the two socket pipes to be assembled together. In order to all conditions are created for the rolling ring 1 in the subsequent Assembly out of the centering socket 2 and centered all around in the socket gap curls up. At the end of the assembly, the rolling ring i comes in the axial middle area of the Sleeve 10 to a standstill, where it also performs its sealing function in the socket pipe connection can best fulfill in the long term. Because of the axial shortness of the conical course 7 of the part of the cross section of the sleeve outer wall 6 6 Centering mount 2, the rolling ring 1 is still so close to the inner edge at the start of assembly 11 of the sleeve 10 that the rolling ring 1 even with the radially largest permissible outer diameter the sleeve 10 in an axially sufficiently deep final assembly position in the socket gap can curl up.

Fig. 2 shows a rolling ring 1 and a centering mount 2 of the same Shaping as in Fig. 1. In contrast to Fig.

1, however, the spigot 5 and the sleeve 10 each have the radially smallest permissible outer diameter. The radially movable tongue 4 of the part of the centering mount 2 that extends over the outer wall of the spigot end 3 due to their elastic deformability radially to the pipe axis there lowered by several millimeters, where they are - due to the tolerance - a smaller one Radial diameter having - tip end outer wall 3 radially clamping, for the Spigot end 5, however, can be pushed through axially when it is installed, otherwise the same Way as in Fig. 1 comes to the plant.

Here, too, the spigot end 5 is centered for the centering mount 2 together with at least one, but better two further radially movable Tongues 4 in the manner already described under FIG. The anterior radial Outer edge 9 of the sleeve 10 is located in the radially inner region of the conical Course 7 of the part of the centering mount that extends over the socket outer wall 6 2, while the end wall 12 of the sleeve 10 directly at the radial transition 8 of the centering mount 2 is applied, being exerted on the centering mount 2 as a result of the centering axial pressure the inner edge 11 of the sleeve 10 already a little in the rolling ring 1 and this begins to deform. By that as a result of her conical shape or

their radially deformable sections centering interaction of the on the socket outer wall 6 and on the spigot outer wall 3 overlapping parts the centering mount 2 is even with the radially smallest permissible outer diameter of the spigot end 5 and the sleeve 10, just as with their radially largest allowable Diameters and all diameter tolerances in between, the coaxial Alignment of the socket pipes to be assembled and the central position of the rolling ring 1 at the latest at the beginning of the assembly of the two socket pipes to the simplest Way achieved. This ensures a secure seal for the socket pipe connection all permissible radial diameter tolerances of your socket gap even when used a rolling ring 1, which is only the known round and therefore extremely inexpensive Needs to have a cross-section, even under the most difficult construction site conditions guaranteed without any problems, and, for example, all, sometimes quite difficult technical assembly conditions for loose sealing elements for sealing stoneware pipes according to DIN 1230, part 1, edition 9/79, DN 100 - 200, fulfilled.

In FIG. 3, the centering mount 2, in which the rolling ring 1 is arranged, an initially radially and then approximately axially on the sleeve outer wall 6 overlapping part with a relatively small, from the circumference the centering socket 2 starting from a partially circle-limited width of e.g. 3 - 5 cm. This part of the centering mount 2 has on each of its two longitudinally axial sides a radially elastically deformable extension 13 on the circumference of the sleeve outer wall 6 is directed so far obliquely-radially to the pipe axis that it is even with the smallest permissible outer diameters of the sleeve 10 still clamping radially on the sleeve outer wall 6 comes to the plant. The leading edge 14 of the radially deformable which is directed towards the socket 10 Approach 13 runs in a kind of tapering axially obliquely to the radial furthest axial Middle part of the approach 13, whereby a radial funnel effect when touching down of the cross section of the centering mount 2 on the sleeve outer wall 6 on the Socket 10 results. The sleeve 10 has its largest permissible outer diameter in FIG. 3 on, whereby the radially elastically deformable extension 13 radially outward into a relatively flat, depending on the course of the sleeve outer wall 6 position is pressed and thereby rests radially clamping against the sleeve outer wall 6 during pipe assembly. Together with at least one, but if possible at least two further shaped in this way, on the sleeve outer wall 6 overlapping parts of the centering mount 2, which in approximately the same distance in front of one another on the circumference of the centering mount 2 and in Fig. 3 are no longer shown for reasons of simplicity, provide the approaches 13 for a sufficiently central position of the centering mount 2 and thus for a central pre-assembly position of the rolling ring 1 to the pipe axis, not shown here of the socket pipe that has already been laid, in whose socket 10 the spigot 5 of the next Pipe can then be installed without any problems.

Fig. 4 shows the same centering mount 2 with an inserted rolling ring 1 like FIG. 3 with the difference that here the sleeve 10 is the radially smallest permissible Outside diameter shows. The radially elastically deformable approach 13 of the part of the centering mount 2 that extends over the sleeve outer wall 6 thereby radially relatively steeply to the pipe axis, so that the projection 13 also in this Situation on the sleeve outer wall 6 still clamping radially and together with the other, Approaches 13, not shown here, the centering mount 2 and thus the one in it arranged rolling ring 1 sufficiently centric to the pipe axis of the already laid Able to align Rohres. The center of gravity 15 of the rolling ring 1 is located within of the smallest permissible, between the outer wall of the spigot end 3 and the inner wall of the socket 10 socket gap i6 resulting from assembly, so that socket pipe connections, where pipe tolerance-related deformations of the rolling ring 1 of 50 and a few percentage points above (such as for stoneware pipes DN 100 - 200 according to DIN 1230, part 1, edition 9/79) may occur, with the considerably cheaper ones compared to push-in sleeves Rolling rings 1 are still simple and safe even under the most difficult construction site conditions can be sealed.

Claims (3)

Centering socket for an elastic rolling ring to seal the muff Enrohrverbindllngell of socket pipe connections Patent claims: fE centering socket for an elastic rolling ring with an approximately round basic or effective cross-section for sealing socket pipe connections, which in its pre-assembly position predominantly in the radially outer portion of its cross-sectional circumference of the independent of includes the sleeve manufactured and with this not firmly connected centering and from this during pipe assembly axially into the socket of a pipe, which in particular consists of mineral materials, is rolled up, with the rolling ring at the latest at the start of assembly with more than half of the axial extent of its pre-assembly cross-section axially in front of and with its outer jacket directly on or just in front of the socket end wall and / or the inner edge of the sleeve lies, and that one or more parts of the centering socket overlap on the socket and / or spigot end outer wall, d u r c h g e -k It is noted that the person or persons on the socket and / or spigot end outer wall (6 or 3) overlapping part or overlapping parts of the centering mount (2) by an at least approximately conical shape, such as a conical shape to the pipe axis radially narrowing course (7), and / or by means of radially deformable sections, such as. radially movable tongues (4), deformable lugs (13) or the like., has or have a design with which this part or these parts in the Are capable of the standards permissible or, for certain types of pipe, of the manufacture usual tolerances of the radial outer diameter of the sleeves (io) and / or spigot ends (5) Compensate these tubes so far that the prior to assembly in the centering socket (2) arranged rolling ring (1) in one for a secure sealing of the socket pipe connection is sufficiently central to the pipe axis of at least the pipe on which Sleeve and / or spigot end outer wall (6 or 3) of the part or parts of the centering mount (2) Centering through mere contact or axial pressure at least until the start of assembly and / or radial centric clamping, on the pointed end (5) during assembly but can be pushed through axially, overlap. 2. centering mount for an elastic rolling ring according to claim 1, d a d u r c h e k e n n n z e i c h n e t that a conical towards the pipe axis is narrowing course (7) of the one or more overlapping on the sleeve outer wall (6) Part or overlapping parts of the centering mount (2) is so short axially or that the rolling ring (1) is still so close to the socket end wall at the start of assembly (12) and / or inner edge (ii) of the sleeve (10) is that the rolling ring (1) at the Assembly still in an axial for a secure sealing of the socket pipe connection sufficiently deep final assembly position can be rolled into the socket (10). 3. Centering mount for an elastic rolling ring according to the claims 1 and 2, d a d u r c h e k e n n n z e i c h -n e t that the on the socket and / or Spigot outer wall (6 or 3) overlapping parts of the centering mount (2) in approximately are arranged at the same distance from one another on the circumference of the centering mount (2).