DE8229877U1 - SOCKET PIPE SEAL - Google Patents

Description

Applicant t. Hermann Mücher GmbH. & Co * KG * j Steinwegstr '* 30 - 32 _t / D- ^ 5830 Schwelm / W. , ", '^ i ώΐ £ ύ # βιϊ'% β, ± φβη ί MVR 4 / ÖS

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The invention relates to a socket pipe gasket using an elastic rolling ring that is in its pre-assembly position predominantly in the radially outer sub-area of its cross-sectional circumference of a manufactured independently of the sleeve and includes with this not firmly connected centering and from this in the. Axial tube assembly in the sleeve of a pipe, which consists in particular of mineral materials, is rolled up, the rolling ring at Start of assembly at least with part of the axial extension of its pre-assembly cross-section over the front start the sleeve protrudes axially, and that the radial diameter! the opening of the centering socket directed towards the spigot end

j is slightly larger than the largest radially permissible outer diameter

j 15 diameter of the einzufahrenden during assembly in the sleeve \ spigot.

Socket pipe connections of various types of pipes, in particular

! made of mineral materials such as made of concrete or stone

tools that are mainly used in the construction of gravity pipes in sewage technology are also used today still, in spite of the penetration of the plug-in socket seals, which are mostly prefabricated in the pipe manufacturer's works, to a greater or lesser extent large scope, mainly for cost reasons, with circular base or effective cross-sections DIN 4O6O, part 1, sealed. In addition to the correct pre-assembly of the round ring on at least one of the two socket pipes, the problem arises when the two pipes are fitted Achieving the most exact central position of the two socket pipes to each other, so that the rolling ring after assembly all around assumes its correct final assembly position in the socket gap. Otherwise there is a risk that the rolling ring does not roll into the socket pipe connection at individual points, and that it is thus not properly sealed. Another problem arises from the fact that with certain Socket pipe connections, such as those of stoneware

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! Ears DN 100 - 200 according to DlN 1220, Part 1, Edition 9/79 »due to the permissible socket and tip end tolerances, deformations of the rolling ring during assembly and in its final assembly in the muffle area of a little more than 50% of its original ring thickness can occur. In such cases, the assembly of a rolling ring is only possible if the center of gravity of the preassembled rolling ring is within the "limits of the smallest permissible socket gap (see DIN 1230, part 1, edition 9/79. P. 12" Explanations ") Previously customary pre-assembly of the rolling ring with considerable pre-expansion on the outer wall of the cylindrical spigot end, such a position of the rolling ring is known not to be achieved Vitrified clay pipe nominal width DN 100 200 - in contrast to earlier - only a single rolling ring thickness is sufficient to seal all permissible socket gaps does not exceed a practicable size at the construction site with the aids generally available there. A guide to the various types of pipes that are used in particular for the construction of house connection pipes, street inlet pipes, etc. (mostly DN 100 - 200) is provided by those in DIN 1230 for stoneware pipes, part 2, edition 9/79, p. 5, maximum values given in table 5.

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. Preassembled at the spigot end or on the inner edge of the socket is, whereby the center of gravity of the rolling ring with appropriate dimensioning of the rolling ring circumferential length compared to the previous Rolling rings preassembled directly on the outer wall of the spigot end are lowered radially by several millimeters to the pipe axis and thus in the area of the smallest permissible

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sigen Muff erispaltes comes to rest. In the case of these rolled belts, which are mostly strongly asymmetrical in cross-section, there is very easily the risk of wrong and mostly too loose pre-assembly, which then usually leads to inadequate preassembly Socket pipe seal leads. But also the problem of With this type of roll rings, a sufficiently precise centric assembly of the socket pipes to be connected is essential nowhere near satisfactory (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, JOOO Berlin 30).

Attempts have therefore been made for many years to solve the problem of the simple and safe assembly of pipes, the socket connections of which should be sealed by means of inexpensive rolling rings, by using - if possible at the same time, pre-centering the spigot end entering the socket - rolling ring mountings that were already in the manufacturing plant of Pipes were additionally fastened in or on the socket. Such rolling ring mountings are, however, hardly cheaper, in fact even more expensive than the socket seals used today for the same types of pipe, such as, for example, stoneware pipes DN 100 - 200. These rolling ring mounts are therefore technically and economically long outdated by these plug-in socket seals, which have some additional advantages, and are prefabricated by the pipe works (eg: BR-PS 537 l84 and 551 327, DE-OS 19 19 549). If you wanted to dimension the radial wall thickness of such a rolling ring receptacle firmly connected to the socket so that it would lock the socket gap to prevent accidentally pushing the rolling ring out of the socket pipe connection, this would be the case, for example, with stoneware pipes DN 100 - 200 because of the The resulting rolling ring deformations of approx. 70 - 80% during assembly require insertion forces which by far exceed the maximum values permitted by standards or practicable on the construction site (e.g. BE-PS 553 324).

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To ensure a centric introduction of spigot ends j on which a • rolling ring would be preassembled, and to ensure its gradual strong deformation of up to 50 and a few percentage points dat ¹ -

> f to facilitate or at glättzylindrischen sleeves häüpt to allow over-5 until it is further known a leadership k approximately sleeve centered on the sleeve set up, which I "by means of a radially reaching inwards Federal at f. face of the Sleeve is supported, from where it merges axially away from the sleeve into an elongated funnel-shaped extension into which the spigot end provided with the pre-assembled rolling ring is pushed. In order to limit the insertion depth, the spigot end has a radially outwardly projecting stop ring by means of which the rolling-in movement of the rolling ring and thus the further retraction of the spigot end into the socket is stopped. Since the outer diameter of the pipe sockets is either not specified at all for various types of pipe or, as for example with vitrified clay pipes DN 100 - 200 in DIN 1230, part 1, edition 9/79, is only given with maximum values - whereby, for example, vitrified clay pipes DN 20Ö; 20, the outer diameter of the sleeve to mm may differ up to 27 - are such sleeve cross Führungshül ■ sen lack of centering of the sleeve on most pipe

types that are still predominantly or at least partially sealed with rolling rings cannot be used. Au ^ addition, the axial socket depth in these types of pipes so short that a rolling ring starting already at several centimeters from the sleeve funnel-shaped expansion f-esterification of the guide sleeve begins to roll, either at all or only Zumm part get into the socket gap would. In this case, its rolling-in movement would be prematurely stopped by the premature contact of the spigot end with the socket face of the preceding pipe, and the approximately axial center position of the rolling ring in the socket, which is required for a secure sealing of the socket-pipe connection, would by no means be reached (DE-OS 17 50 505 ).

The invention is based on the object of using the known elastic rolling rings, preferably those with

the simple, approximately round basic or effective cross-section, by means of a relatively inexpensive and little space to improve engaging loose centering, so that the correct pre-assembly of the rolling ring and its subsequent centric assembly also with socket pipes, the axially relative Shortly dimensioned socket depths and already limited, but still quite considerable, permissible deviations in their socket gap widths have, in the narrow pipe trench even by inexperienced pipe layers using practicable insertion forces Carried out practically flawlessly and therefore functionally reliable even with rolling ring deformations of a little more than 50% can be.

This object is achieved by means of the socket pipe seal according to the invention solved by the characterizing features of claim 1.

To get the required insertion force for the assembly also with small and smallest, radially still permissible inner diameters Reduce the sleeve by a special shape of the holding part reaching into the sleeve, sees a further development of the invention, the characterizing features of claim 2 for application.

If the holding part reaching into the socket does not at all affect the value of the push-in force to be used during assembly should or may have an effect, according to another training £ 5 of the invention, the characteristic features of the Claim 3 to be taken into account when shaping the sleeve and the holding part *

To improve the fastening of the centering mount by means of of the holding part reaching into the sleeve, according to another development of the invention it is advantageous to use the characteristic Features of claim 4 to be used in the design of the holding part *

If the inner diameter of the socket is different due to the pipe tolerance May show dimensions bold, is after a wide-

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Ren training of the invention a proper attachment of the centering on the sleeve inner wall can be achieved most easily by applying the characterizing features of claim 5 zn .

The advantages that can be achieved with the invention are, in particular, that a simple cross-section - e.g. completely rounder - and therefore also easy to produce when using cellular rubber by means of a rolling ring inexpensive to manufacture, preferably from harder, possibly

somewhat elastically deformable plastic material existing centering, in which the rolling ring is expediently already The centering mount or the rolling ring is used in the manufacturing plant, even under the most difficult construction site conditions easily preassembled in a sufficiently central position on the socket of the pipe that has already been laid can be. This result can already be achieved with little additional material expenditure for the holding part, with the Space requirement for the centering socket with inserted rolling ring during transport and storage, especially for the use of a holding part, which consists of radially deformable holding tongues, because of the radial spreading apart d "? for holding tongues possible close fitting together the centering mounts is hardly larger than the other Rolling rings with wide adhesive lips or the like that are used. Since the rolling ring is already fitted with the centering mount is attached sufficiently centrically in its pre-assembly position on the socket of the pipe that has already been laid, prepares the safe centric assembly also with such socket pipes, the relatively large radial socket and / or tip end tolerances may show no more difficulties. This also ensures a perfect seal the socket pipe connection necessary, all-round uniform The rolling ring is reliably guaranteed to roll into its ideal final assembly position in the axial middle area of the sleeve * After all, the one who cares within the limits of the smallest ZtU the center of gravity of the socket gap of the pipe that has already been laid, the pre-assembled rolling ring ^ for

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proper assembly and secure sealing of the Socket connection also of pipes, where due to the permissible radial diameter tolerances of their sealing surfaces delimiting the socket gap ujQd a few percentage points above this, and / or in which, compared to the required, relatively large ring thickness, axial socket depths (such as B. for vitrified clay pipes DIN I23O, part 1, edition 9/79, DN 100 - 200) are provided.

It show - each in a partial cross-section - the Embodiments in

1 shows a centering mount with an inserted rolling ring, which by means of a ring running all around on the inner wall of the socket Holding part is pre-assembled;

FIG. 2 shows a similar centering socket with a rolling ring as in FIG. 1, the holding part of which is in a radial recess in the sleeve lies;

Fig. 3 shows a centering mount with an inserted rolling ring, the is preassembled by means of a holding part that is only in contact with the inner wall of the socket in the sole area of the socket, as

FIG. K and FIG. 5 each show a centering mount with an inserted rolling ring, which is preassembled by means of radially movable retaining tongues on the inner socket wall of pipes which, due to pipe tolerances, have different sizes but still permissible inner diameters of their sockets.

In Fig. 1, the rolling ring 1 is in its pre-assembly position in a centering mount 2, which predominantly surrounds the radially outer portion of its cross-sectional circumference, which consists of a harder or largely rigid plastic material consists. The centering mount 2 extends all round into the socket with a holding part 4 resting against the socket inner wall 3 5 so far in axially that on the one hand the centerpiece 2 and thus the rolling ring 1 arranged in it are sufficient can be safely preassembled on the sleeve 5 of the already laid raw material, and that on the other hand the sealing

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* areas 6 of the socket gap in the later final assembly position

of the rolling ring 1 are axially little or, as shown in FIG. 1, no longer covered by the holding part 4. The radial wall thickness of the holding part 4 of the centering mount 2 is as thin as possible - e.g. only 0.6-0.8 ram, but nevertheless already sufficiently strong - dimensioned, so that when rolling over the holding part 4 by the rolling ring 1 expended Insertion force only marginally increased. If the radial diameter tolerances permitted for the socket inner wall 3 do not have to be fully utilized by the pipe manufacturer, there is the option of changing the diameter of the Holding part 4 of the zen-iris setting 2 to be dimensioned so that it

; is still in the lower tolerance range of the socket inner wall 3.

In this case there is compared to sockets 5 of pipes, which is the entire tolerance range of the socket inner diameter claim, no increase at all during assembly for rolling over the holding part 4 by the rolling ring 1 required insertion force. The radial diameter of the opening of the centering mount directed towards the spigot end 7 2 has a value that is slightly larger, e.g. 2-3 mm, than the largest, radially permissible outer diameter of the spigot end 7. The dashed lines show the rolling ring 1 in its final assembly position between the sleeve inner wall 3 and the assembled one Spigot 7 in the axial middle area of the socket? 5 ·

In Fig. 2, the sleeve inner wall 3 has on its to the socket opening to the facing side a recess 8 into which the holding part 4 of the centering mount 2 during the pre-assembly of the Rollring 1 was inserted. The inner wall of the holding part 4 of the centering connection 2 extends axially in the direction of the socket face steplessly to the socket inner wall 3 over. In this way «becomes any increase in the insertion force, which occurs when Rolling over of the holding part 4 by the rolling ring 1 without the ι presence of the recess 8 would result.

ί In Fig. 3, the rolling ring 1 is in the centering

'35 Solution 2 in its pre-assembly position in the lower part of the socket 5 - The holding part 4 of the centering barrel 2 slightly here Ie-

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diglich in the sole area of the * sleeve 5 along a piece of the Müffeniniienwänd 3 axially into the sleeve 5. In this case the pre-assembly of the Röllrings 1 Zeritrierfassung 2 is conveniently effected quite Kürz before mounting $ the sleeve tubes so that the 2entrierfassung 2 only iioch short in their apex region - to an eventual falling out of the centering mount 2 prevent from the sleeve 5 ² ^ - up needs to be held at the start of assembly by the pipelayer standing on the socket 5 of the pipe that has already been laid. Here, too, the radial wall thickness of the holding part 4 of the centering mount 2 is made as thin as possible, which, in conjunction with its relatively small pitch circle circumference, leads to a barely perceptible increase in the insertion force during assembly.

In Fig. 4, the sleeve 5 has its r "adial largest allowable Inside diameter. One from the centering mount 2 to the socket face to outgoing retaining tongue 9 runs obliquely radially outward, where it is due to a certain elasticity of the Plastic material from which the centering mount 2 is made, rests radially clamping against the socket inner wall 3. Together with at least one, but preferably two to three others such retaining tongues 9, which are arranged at approximately the same distance on the circumference of the centering mount 2, in FIG. 4 but are no longer shown for reasons of simplicity, these retaining tongues 9 ensure that they are sufficiently central Position of the centering mount 2 on the sleeve 5 and thus for a central pre-assembly position of the rolling ring 1 for here not shown pipe axis of the already laid Muffe.rohres, in the socket 5 of which the spigot 7 of the next pipe can then be easily mounted. The radial The wall thickness of the holding tongues 9 is as thin as possible here, e.g. 0.8-1.2 mm thick, which is measured in terms of their small pitch circle circumference hardly noticeably increases the insertion force required during assembly.

Fig. 5 shows the retaining tongue 9 of the centering mount 2 in one Sleeve 5, in contrast to the otherwise identical FIG. 4

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the sleeve 5 has its radially smallest permissible inner diameter The center of gravity 10 of the roller belt i preassembled on the socket 5 by means of the centering mount 2 lies within the limits of the smallest permissible socket gap ± 1 _t that results after the spigot 7 has been moved into the socket 5.

Claims (5)

Applicant: Hermann Mücher GmbH. & Co. KG., Steinwegstr. 30 - 32 D-583O S chwelm / W. . ".-" ι Ei £ erios Breeding: MVR 4/82 I · »t • I It tl | Socket pipe seal 1. Socket pipe gasket using an elastic Hollrings, in its pre-assembly position, predominantly in the radially outer portion of its cross-sectional circumference of includes a centering mount made independently of the sleeve and not firmly connected to it and made of disser in the case of pipe assembly axially in the socket of a pipe that in particular consists of mineral materials, is rolled up, the rolling ring at least at the start of assembly with part of the axial extent of its pre-assembly cross-section protrudes axially beyond the front beginning of the sleeve, and that the radial diameter of the opening of the centering mount directed towards the tip end is slightly larger than the largest radially permissible outer diameter of the Assembly in Uiβ socket to be retracted spigot, characterized in that the axially between the pre-assembly position and the final assembly position of the rolling ring (1) and reaching into the socket (5) (4) of the centering socket (2) the smallest, radially permissible inner diameter of the socket due to the pipe tolerance (5) not reduced, or only so slightly reduced that the rolling ring (l) when rolling over the holding part (4) required insertion force even with small and smallest radially permissible socket gap widths (ll) for the relevant The nominal pipe size does not exceed the permissible or practicable value according to the standards. 2. socket pipe seal according to claim 1, characterized characterized in that the holding part (4) of the centering mount (2) is only on one or more partial areas the total circumference of the socket inner wall (3) into the socket (5) enough. 3. socket pipe seal according to claims 1 and 2, characterized in that the MuffεΠ- ί I ■ M t t M Mil I ■ * ι »I ■) i t f ι β «3 11 I. i » * ι ι ι · ι 1 ■> I I I I till t 1 I 1 I t inner wall (3) one or more, the radial inner diameter the sleeve (5) has an enlarging recess or recesses (8) which the holding part (4) of the centering mount (2) on η imm t b or on η elim en. 4. socket pipe seal according to claims 1 to 3i as characterized in that the into the
Muff (5) reaching holding part (4) consists of at least swei, but preferably three to four, radially deformable holding tongues (9) arranged at approximately the same distance on the circumference of the centering mount (2). 5. socket pipe seal according to claim 4, characterized
characterized, dföß the radially deformable
Retaining tongues (9) run axially from the centering mount (2) approximately obliquely or conically towards the socket face, widening radially outward, and that these retaining tongues (9) secure the centering mount (2) by means of radial clamping on the inner wall of the socket (3 ) also with the pipe tolerance-related differences in size, but still permissible inside diameters of the socket (5) during the pre-assembly position (Hold? -3S Rollrings (l). Ii Ii it Il ι ι ι ι 11 κ lllllll * · t f I I I M I I ι <ι ι ι I <ι ( II » * it I. llllllll H ti 4th ·