DE2162435A1 - RUSH LOCKING OF RUBBER SEALED PIPE CONNECTIONS - Google Patents

Description

Applicant: Ludwigshafen / Rhein, December 15, 1971

Halbergerhütte GmbH P 4898 I / zip _ΛΛ1% ^, _Λ -6604 Brebach / Saar ZI 62435

Representative :

Patent attorneys

Dipl.-Ing. Adolf H. Fischer
Dipl.-Ing. Wolf-Dieter Fischer
67 Ludwigshafen am Rhein
Richard-Wagner-Strasse 22

Shear protection of rubber-sealed pipe connections

The invention relates to a device for securing ν, οη against rubber-sealed pipe connections Thrust, with longitudinal forces acting on the pipes, as with movable socket connections due to the internal pressure and / or external forces pull apart these connections could be made.

There are known pipe connections in which the spigot end of a pipe in a socket with the help of clamps is held, with friction surfaces to prevent the tip end from being pulled out. Such designs can only be used at low operating pressures,

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apart from the fact that a constructive uncertainty, in such a connection lies than the coefficient of friction between clamp and pipe itself can change, e.g. through the action of moisture.

It is also known in a rubber sealing ring holding lamellae made of steel, which prevents the spigot from being pulled out of the socket is that a groove is provided at the spigot so that the lamellae when making the connection in this Can engage the groove and thus hold the spigot end. But here, too, one is handicapped, such a connection to be used for larger diameters and higher pressures, because for pipes with a nominal width of approx. 300 mm and when pressures above 16 atmospheres occur, such a connection is no longer tenable.

There are also blockages at the spigot end of a pipe Known in the socket with the help of self-tapping screws and also the arrangement of toothed ones pressed onto the pipe Rings for holding the spigot. If you have such fixed connections between socket and spigot end of the pipe, this connection can no longer be angled and is closed at high operating pressures fear that the cutting edges will be damaged and the pipe will still slip out of the socket.

There is also a thrust lock known in which in the spigot end of the tube are screwed grooves in which

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a retaining ring can be used to accommodate, then is supported against the counter ring fixed in the socket. For the production of this lift lock but above all it is necessary to work in a groove at the spigot so that such a connection is very expensive in terms of cost, apart from the fact that a thickening is also needed at the spigot end is, especially if the annular groove does not come to lie in the pressureless part of the spigot end.

Where there are higher pressures, i.e. from 20 atmospheres upwards, one is always forced to ensure that an angled socket connection is secured against shear loads with the aid of a ring and a groove. Now such lines has been shown during the pressure test, the tubes under the influence of longitudinal force and lateral force in an angled position superimposed Bean learn ¹ -spruchungen that dazu'führen that the annular groove as the weakest point in the tubular shaft starting point of breakage is. A pipe with a nominal width of 500 mm, for example, has already been torn off at 50 atm.

Finally, according to a known proposal by the applicant, it is also known to have an external bead on the tubular shaft to form, which lies against a retaining ring or a counter profile of a sleeve; the retaining ring can thereby be fixed or movable, but must be positively connected to the tubular shaft to be secured.

The invention has set itself the task of a fuse

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against shear forces in the case of rubber-sealed movable ones To create socket connections that are easy to manufacture and easy to assemble and yet the This ensures that the socket connections are not pulled apart by the internal pressure, even at high pressures and / or external forces can occur »

In detail, the following had to be taken into account when setting the task:

1. Based on the existing mold equipment (molds, models and core boxes), a modified one had to be made Socket shape can be found, which allows all molding facilities by insignificant changes to be modified so that a device for shear protection can be attached.

2. The device for securing against thrust should be designed so that it continues to allow the The advantage of being easy to lay with plug-in connections, i.e. simply inserting a spigot end to be kept in a sleeve with an inserted rubber sealing ring, two possibilities should be given:

a) Prior assembly of the device (with inserted retaining ring) on the sleeve before inserting the spigot end in the case of retaining rings that are not easily deformable (e.g. slotted rings made of metal, plastic or Hard rubber) with subsequent insertion of the spigot end into the connection.

b) Placing the device and the retaining ring on the spigot when constructed from limbs

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non-self-supporting retaining rings (e.g. toothed segments connected with springs or elastomers) , but also less deformable retaining rings with subsequent fastening of the device on the socket and inserting the spigot end.

This object is now achieved according to the invention in that a coupling ring with claws behind a, provided on the pipe shaft, closed or interrupted bead, on the socket of the pipe or the Fitting is attached, the spigot end of the pipe, through a slotted or closed Retaining ring, which sits positively on the pipe and rests against the coupling ring, is secured against being pulled out. The retaining ring can be made of metal, plastic, hard rubber or similar materials *

Another design according to the invention provides that a two-part coupling ring is provided, which means Screw connection is held together. If necessary, the connection can also be established in such a way that over the outer edge of the claws of the coupling ring the claws inwardly pressing, closed ring can be pushed. '·

Another design according to the invention provides that the The coupling ring with the claws encloses only a little over half of the circumference of a sleeve, which is advantageous the two ends of the roughly semicircle over-

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Throwing ring tangentially beyond the semicircle keep walking.

If necessary, the coupling ring can be connected to the sleeve with the aid of a bayonet lock or with the help of a screw connection., on the socket determine. A similar design provides the "union ring through between its claws and the / sleeve to attach driving wedges to the sleeve.

W According to a further proposal of the invention, the thrust safety device can also be designed so that a continuous, closed or interrupted bead is attached as a system for the retaining ring at the spigot end of the tube, so that the retaining ring experiences a thrust in sighting against the inner surface of the coupling ring As a result of this thrust force acting against the inner surface of the coupling ring, the slotted retaining ring is pressed against the spigot end and thus the connection is thrust secured.

According to a further proposal according to the invention, W can form the connection in such a way that the retaining ring is fixed on the spigot end of the pipe by means of self-tapping screws.

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can be laid. ί

In many cases it is advantageous to use the device to be designed so that the retaining ring on the face of the surface of the spigot end of the tube Surface has a toothing, the toothing counter to the direction of movement of the spigot end when an internal pressure occurs. If necessary, the device can also be designed in such a way that that a retaining ring is formed on its, the tube facing flat cone and in these Space between the retaining ring and the spigot end of the tube, a ring or segments with one facing the tube surface Toothing is (are) used, whereby the toothing is opposite to the direction of movement of the spigot end when internal pressure occurs, the toothed segments with the Retaining ring firmly connected or used in this movable.

Finally, according to a further proposal according to the invention, you can proceed so that at least three, possibly with a toothing in the direction of E £ gen the tubular surface provided segments with the help of elastic elements, preferably by means of springs to form a retaining ring connected sindj a similar design is designed so that a retaining ring with the help of tooth segments is formed, which is connected by strips of an elastic material, preferably made of elastomers are. Finally, it can be advantageous to design the connection in such a way that tooth segments are by means of springs

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are connected, with spacer sleeves made of plastic in the spaces between the segments or the like are used, which optionally accommodate the springs in their interior.

Another embodiment of the invention provides that to increase the pressure of the retaining ring or the segments against the inner surface of the coupling ring on the tip end of the ear is a circumferential, closed or interrupted one Weld bead is applied.

Further features of the invention emerge from the The following description of exemplary embodiments in conjunction with the drawings and the claims.

It shows, in sohematic sketches,

Figure 1 is a partial section through a spigot end with sleeve with a coupling ring NAB,

Figure 2 is a partial plan of Figure 1 and

W Figure 3 on a reduced scale, one page

crack to Figure 1 seen from the left,

Figure 4 a partial section of a pipe connection, in which a two-part coupling ring is used,

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Figure 5

Figure 6

Figures 7
and 8

Figure 9

Figures 10
and 11

Figure 12

Figure 13

a partial section of a pipe connection in which the claws of the coupling ring are still separately secured,

a side elevation of Figure 5 " i & reduced Scale, seen from the left,

a partial section and a side view of a pipe connection in which the Union ring can be fixed with the help of a bayonet lock,

a partial section through a pipe connection, in which the coupling ring means a screw connection can be fixed,

Outline and side elevation of a connection between the coupling ring and the socket with the aid of driving wedges,

a partial cross-section through a connection in which .ein as an attachment for djsn retaining ring. Welding bead is provided,

a partial section of the same kind, the retaining ring being fixable by means of sonic screws is,

14, the same partial cross-sections show the execution and 15 show shapes in which the retaining ring can be fixed with the help of teeth,

-10-

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Figures 16
and 17

! figures 18
and 19th

! Figures 20
and 21

a plan view and a partial section by one embodiment at which segments are connected to a retaining ring with the help of elastic means,

a representation in which the tooth segments to form a retaining ring are connected by means of strips of elastic material,

such a representation, with the connection of the tooth segments except the elastic Means nor spacer sleeves were arranged and

Figures 22
and 25

a view and a partial cross-section a connection in which to rest for the tooth segments on the spigot end a welding bead is attached *

In Figure 1 ei'n cross section is shown through a pipe connection, in which the spigot 1 of a pipe on which a bead 2 is attached, which can be closed or interrupted, is inserted into a sleeve 3, wherein a seal 4 is received in this sleeve. A retaining ring 5 »made of metal, plastic, hard rubber or can be made of a similar material, is supported with its edge facing the spigot against the bead 2 and is frictional with the help of a coupling ring 6 pressed onto the spigot end 1, which with the help of claws 7

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of the union ring 6, which encompass the socket edge, is made possible.

Another erfindiingsgemaße embodiment to the Securing the spigot end of a pipe against being pulled out of the socket is shown in FIG. 4-, in which again a retaining ring 5 is supported against a weld bead 2, ' wherein the claws 9 of a., two-part Retaining ring 8 are used, which is combined with the help of a screw connection 10 to form a closed piece is.

A similar design is shown in FIGS. 5 and 6; there a retaining ring 5 is again on the inserted spigot end of a pipe 1, resting against the weld bead 2 provided, which with the help of a coupling ring 11 frictionally is pressed onto the spigot end 1, the claws 12 being closed by means of a device that can be slipped over them Ring 13 are brought to the plant over the bead of the sleeve 3.

However, one can also proceed as shown in FIGS. 7 and 8 to fix a coupling ring is} where namely the retaining ring 5 with the help of a coupling ring 14 is pressed onto the pointed end 1, which is provided with claws 15 with corresponding abutments 16 cooperate on the bead of the sleeve 3, so that in this way a bayonet lock between.der sleeve and the coupling ring can be produced.

In addition, an appropriately trained supervisory authority is required.

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ring 17 can be fixed to a sleeve 3 with the aid of a screw connection 18, as shown in FIG.

In Figures 10 'and 11 it is shown that a definition of a coupling ring 20 and thus the Retaining ring 5 can be carried out in a very simple manner is by namely in the sleeve overlapping edge 20 of the cap ring 19 corresponding grooves are incorporated, through which wedges 21, which with one of their surfaces behind the bead of the sleeve 3 to come lie, are collectible.

In detail sections is shown in Figures 12 to 15, that one can also use the proposals of the present invention in various other ways following, can establish a secure connection between the Eohrspitzende and a sleeve, which e.g. (see FIG. 12) can be carried out with the aid of a coupling ring 22 is, which presses the retaining ring 5 against a circumferential weld bead 2, which is closed or interrupted can be. But you can also (Figure 13) on the spigot 1 within a coupling ring 22 a Provide retaining ring 23 with the help of self-tapping screws is set on the spigot 1 of the pipe. The Befe direction of movement of the spigot end 1 of a pipe that is

e.g. when internal pressure occurs when slipping out of the socket, is shown in FIGS. 14 and 15 indicated by the arrow 25 and here this direction of movement is * ring 24 counteracted. Such a retaining ring 24, which is inserted within a coupling ring 22, has

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on the surface facing the surface of the spigot end 1 of the tube, a toothing 26 which is opposite to the direction of movement of the spigot end when internal pressure occurs. A similar embodiment is shown in FIG. 15, but there a retaining ring 27 is used, which is tapered in the direction of arrow 25 on the surface facing the pipe and in which-in the space 28 between the retaining ring 27 and the spigot end 1 of the pipe a ring or segments 29 ′ with a toothing ′ 30 facing the tube surface is or are inserted. Here, too, the toothing 30 is created again *

against the possible direction of movement of the tip end when internal pressure occurs. If with a toothing 30 provided segments 29 are used to form the retaining ring, then these can be used with the retaining ring 27 can either be firmly connected or inserted movably in the retaining ring *.

A particularly simplified embodiment is available then available if, as shown in Figures 16 and show, segments 31 are used, which are connected with the help of springs 32 to form a closed retaining ring 33 / will. The segments 31 are again with a counter to the possible direction of movement of the spigot 1 '' aligned toothing 34 · and can establish the connection be carried out not only with the help of springs 32 but also with the help of other elastic elements, so as to form a retaining ring 33. Such an embodiment is shown in FIGS. 18 and 19, where such an embodiment Retaining ring 35 is formed in that toothed segments

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are connected by strips 36 of an elastic material, preferably made of elastomers. Here, too, there are again corresponding toothings on the surface of the segments 31 facing the tip end 1 34 incorporated.

In certain cases, another one according to the invention is used Embodiment be advantageous,> as shown in Figures 20 and 21, where namely segments 37 with a toothing 3 ^ 'on the one hand by means of Springs 32 are connected, but also on the other hand by inserting spacer sleeves 38 made of plastic or similar materials between the segments 37. As shown in the drawing, the springs 32 can be received within the sleeves 38 and thus be protected against external attacks.

To increase the compression of the rings or segments to get against the inner surface of the union ring, you can also proceed as shown in Figures 22 and 23, where on the spigot end of the tube a circumferential, closed or interrupted weld bead 39 is applied against the then the edge of the retaining ring or of segments 31, which form the retaining ring with springs 32, lay. To such a retaining ring is again a cap ring 22, which is based on various described above Kind is definable, pushed.

The main advantage in assembly can be seen in that especially in the embodiment of Figure 1, the

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Connection like any other plug-in connection can only be made in a shear-proof manner, that the spigot is pushed into the socket. All other previously required operations, i.e. that Put on the coupling ring and any Retaining rings can be made quickly and without devices.

In the case of the embodiments according to FIGS. 14-15, 15-17-19 and 21 it should be noted in particular that these solutions can be used if there is no welding device available on the construction site - which is often the case stands.

With regard to the dismantling, it can be seen that with all slotted, little deformable rings the shear protection can be solved by placing between Tube and union ring a wedge into the slot of the retaining ring drives in. This is done in the case of the retaining rings, which are made up of links and are not self-supporting Loosen the shear protection by using sliding plates drives from the front under the toothed segments, which then interrupt the connection from the toothed segment to the spigot end.

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Claims (3)

Claims (1.)) Device for securing rubber-sealed pipe connections against thrust _t when acting on the pipes. Longitudinal forces, characterized in that a coupling ring with claws behind a closed or interrupted bead provided on the pipe shaft is attached to the socket of the pipe or the fitting, the spigot end of the pipe being secured by a slotted or closed retaining ring on the The pipe is firmly seated and rests on the coupling ring · is secured against being pulled out. 2.) Device according to claim 1, characterized in that a two-part coupling ring (8), is provided, which is held together by means of a screw connection (10). 3.) Device according to claim 1, characterized in that over the outer edge of the claws (12) of the coupling ring (11) a closed ring (13) which presses the claws (12) inwards can be pushed. 4.) Device according to claim 1 and 3, characterized in that that the coupling ring with the claws is only a little over half the circumference of a socket encloses, advantageously at the two ends of the coupling ring which forms approximately a semicircle just approaches are provided. 5.) Device according to claim 1, characterized in that the coupling ring (14) with the aid of a Bayonet lock (15, 16) with the sleeve (3) is connectable. -17 - "6.) Device according to claim 1, characterized in that that the coupling ring (17) can be fixed to the sleeve (3) by means of a screw connection (18) is. 7.) Device according to claim 1, characterized in that the coupling ring (19) through between • its claw edge (20) and the sleeve (3) rub-in wedges (21) can be fastened to the sleeve (3). 8.) Device according to claim 1 to 7, characterized in that that as a system for the retaining ring (22) at the spigot end (l) of the pipe a utalaufende, closed or interrupted, weld bead (2) attached so that the retaining ring (22) exerts a pressure in the direction against the inner surface of the coupling ring (3) learns. 9.) Device according to claim 1 to 7 ,, characterized in that that the retaining ring (23) by means of self-tapping screws (24) on the spigot end (l) of the pipe is determinable. 10.) Device according to claim 1 to 7, characterized in that that the retaining ring (24) facing the surface of the spigot end (1) of the tube Surface has a toothing (26), the toothing counter to the direction of movement of the spigot end (1) when internal pressure occurs. 11.) Device according to claim 1 to 7, characterized in that a retaining ring (27) on his, the Tube facing surface is conical and 309825/016 In this space (28) between - "altering (27) and spigot end (1) of the tube a ring (29) or segments (29) with a toothing facing the tube surface is (are) inserted, the toothing against the direction of movement of the spigot end (l) stands when an internal pressure occurs. 12.) Device according to claim 11, characterized in that that the segments (29) provided with a toothing (30) with the retaining ring (27) are firmly connected or inserted movably in these. 13.) Device according to claim 1 to 12, characterized in that at least three, possibly provided with a toothing in the direction against the tubular surface segments (31) with the help of elastic elements, preferably by means of springs (32) connected to a retaining ring (33) are. 14.) Device according to claim 1 to 13, characterized in that a retaining ring (35) with the help of Tooth segments (31) is formed by strips (36) of an elastic material »preferably are connected from elastomers. 15.) Device according to claim 1 to 13, characterized in that toothed segments (37) by means of springs (32) are connected, with spacer sleeves (38) made of plastic in the spaces between the segments (37) Od. Like. Are used, which may accommodate the springs (32) in their interior. 309 8 25 / "θ 1 69 16.) Device according to claim 10 to 15, characterized in that to increase the pressure the retaining ring or the segments (31) against the inner surface of the union ring (22), on the spigot end (1) of the pipe a circumferential, closed or interrupted welding bead (39) is upset. 3 0 9 8 2 ϊ> / Ü 1 G 9