DE1525831A1 - Pipe connection for thread and socketless pipe ends - Google Patents

Description

PATENT LAWYERS

dr.w. Schalk dipping, p. Wirth dipl-inccDannenberg DR. V. SCHMIED-KOWARZIK · DR. P. WEINHOLD

6 FRANKFURT AM MAIN

OR. ISCH (NHIIMIIt IT ». 19

September 16, 1968 P 15 25 831.8

PW / Dr.Jie / Ii / Hd Oase 65: 593

S 0 Ή BL, a partnership

1010 North Grand
Mesa, Arizona / USA

Pipe connection for threadless and socketless

Pipe ends.

The invention relates to a pipe connection for threadless and socketless pipe ends, in which the bracing or! Clamping the pipe ends by means of the respective pipe end Inner sleeve parts with a frustoconical outer surface made of flexible, sealing material and these inner sleeve parts surrounding outer sleeve parts takes place with frustoconical and are provided with inner surfaces inclined towards one another are, with inner and outer sleeve parts for bracing in Alignment are movable relative to each other.

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The term "pipe" is used here in the broadest sense and includes pipes, lines, permanently attached to containers Nozzles or Hippel or pipe fittings or pipe fittings etc,

Attempts have already been made frequently to connect the ends of pipe sections to one another without these ends for this purpose with a Thread or with ITuts and without closing them together glue. However, these known fasteners have had various disadvantages such as leakage, high cost, difficulty when assembling and disassembling, no easy adaptability to different pipe diameters, high Weight and susceptibility to corrosion.

A pipe joint is also known which uses a one-piece inner sleeve and a two-piece outer sleeve. Here the inner sleeve and outer sleeve can be moved in the axial direction relative to one another in order to achieve a preload. So that these known pipe connection is effective, however, there are still more connecting elements, such as clamping rings, clamping jaws and clamping brackets necessary.

The invention, on the other hand, is a simple one, consisting of an outer sleeve and Internal sleeves to create existing pipe connections without the use of additional clamping elements, which makes it possible to create Gewindeloae

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Connect pipe ends of different diameters in the simplest way, tightly and securely.

This is achieved according to the invention in that for each of the two pipe ends to be connected to one another an independent Inner rack is provided, each of the two inner sleeves having a frustoconically inclined outer surface, that both inner sleeves are surrounded by a single common outer sleeve, the two inclined frustoconically running inner surfaces on v / eist, v / elche in the direction of one another diverge, and that the outer sleeve on the frustoconical gev, 3igt extending inner surfaces and the inner sleeves have interacting threads on the outer surfaces, in such a way that the inner sleeves can be moved in the axial direction relative to the outer sleeve by rotating the respective pipe sections.

The pipe connection according to the invention is suitable for any type of Pipes, such as pipes made of metal, plastic, cement, asbestos cement or clay, and they can be used in no time at all wrenches, taps, drifters, sealing material or cement. It also allows To connect pipes of different materials without the risk of electrolytic gates in pipelines Metal occur. The pipe connection according to the invention is corrosion-resistant, it is light in weight, it is economical

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schaf tlioh and can easily be reused.

In the following, the invention is explained in more detail with reference to the drawings, for example, namely pointers

fig. 1 shows a perspective representation according to the invention Pipe connector, by means of which the opposing threadless ends of two pipe sections are connected;

fig · 2 a longitudinal sonality in a larger scale after the line 2-2 of fig «11

fig. · 3 a ßohnittansioht of the left rope of fig. 2, from the the position of the different ropes to one another before joining and sealing can be seen ι

fig. 4 shows a cross section along the line 4-4 of FIG. 2;

fig. 5 a leilansioht on a larger scale of the in fig. 2 circled and numbered 5, i.e. the means that prevent the pipe from falling under the influence of a medium under high pressure migrates outside;

fig. 6 perspective and schematic the first step towards

Production of a Hohrverbindungsstüokesf i Pig. 7 is a longitudinal section taken on line 7-7 of FIG. 6;

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fig, 8 a schematic representation of the first section

the wrapping process in which the ropes of the pig. '' . and 7 resin-impregnated glass fibers wrapped around the j

Pig. 9 is a view similar to Pig, FIG. 8, but in which the hair-impregnated glass fibers are placed on the connectors in the longitudinal direction thereof;

Pig.10 the additional wrapping of the outer parts of the connectors with impregnated glass fibers;

Pig.11 exploded view of the manufacturing step in which the sleeves of a central shaft or axis and the one during the winding process used cutting disks are removed;

Pig, 12 in perspective one way how elastomer molded rings from the fiberglass-resin housing can be removed after hardening;

Pig, 13 in a longitudinal section a similar possibility for Removing the elastomeric sleeves;

Pig, 14 is a cross-section on line 14-14 of Pig, 14;

Pig. 15 in an exploded view in which the elastomeric sleeves are made before removal the housing can be cut apart or cut;

Pig, 16 the trimmed sleeves after reinsertion in the housing in a position in which they the tube end be able to record;

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Pig. 17 a longitudinal section through an embodiment siorm of the invention, provided in the bellows-shaped spacers are to a touch between the flowable Medium and the housing to prevent}

Pig, 18 a section through another embodiment, he which both the pipe and the housing are provided with a coating in order to, among other things, increase the corrosion resistance to enhance? and

Pig, 19 shows a section through a further embodiment, "in the the whole housing is provided with only one thread running in only one direction.

As shown in FIGS. 1 "to 5 , the binding station has a practically rigid outer sleeve 10, in which inner sleeves 11 and 14 are arranged, which are made of a soft material that is impermeable to flowable media, for example an elastomer has an internal thread and each of the internal sleeves 11 and 12 has a corresponding external thread, so that when one or both of the hoofs is rotated relative to the external sleeve, a longitudinal or axial displacement of the internal sleeve or sleeves in the external sleeve takes place cooperating, threaded surfaces of the sleeves so beveled that the hops are clamped more and more tightly in the above-mentioned üängsverecMebung as a result of a wedge effect, whereby a feet "seal and connection between the outer sleeve and the

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both pipe ends 13 and 14 »on which the inner sleeves are arranged Bind, is established. The incline runs here so that every attempt to pull the pipe ends out of the outer socket takes on the wedge and locking effect.

More precisely, the outer sleeve 10 is initially as a long, usually an approximately tubular element made of glass fibers and an synthetic Hara, B.B, an Epoxybare * As shown in | <in drawings, it is frustoconical formed, the two truncated cone-shaped parts 16 and 1t with their broad ends ktxx each other facing and formed integrally with one another. At least a large portion of the frustoconical inner surface of each truncated cone 16 or 17 is, as mentioned above, provided with an internal thread, these threaded internal surfaces, seen towards the middle (where the truncated cones 16 and 17 merge), further away from each other » 33a, the threaded inner surfaces further separate from one another towards the center of the housing and towards its ends become closer or come closer to one another, when one of the inner sleeves 11 or 12 and the outer sleeve rotates 10 the respective sleeve in the rope of the outer sleeve close the end of which, which has a relatively small diameter, is glued in place by means of a wedge effect. As a result of this wedging will be the pipe ends 13 or 14 sealed and held as described above. ·

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In the embodiment shown in FIGS. 1 to 5, the outer sleeve 10 has two internal threads running in opposite directions '·' erect, with a Reohtsgewinde in one of the truncated cones and with a left-hand thread in the other truncated cone · 'As a result, when rotating, the outer sleeve · 10 becomes relative to the stationary pipe ends 13 and 14 either depending on the direction of rotation captured or clamped and sealed or released.

On the frustoconical inclined inner surface of the truncated cone 16, a buttress thread 18 is attached, while a corresponding but oppositely extending buttress thread 19 on the frustoconical inclined Inner surface of the truncated cone 17 is provided. Both buttress threads 18 and 19 are aligned so that a maximum Force can be transmitted in the direction of the narrow end of the outer sleeve against which the corresponding sealing sleeve is jammed to achieve a seal under wedge effect. For example, the buttress thread 18 on the stump 16, like in Pig. 5, generally radial flanks 21 on the side of the thread leading to the corresponding end of the outer sleeve indicates, and also essentially eohräge Hanken 22, which are turned away from this end of the outer sleeve. In other words, each of the blanks 21 (FIG. 5) is practically crimped to the common axis of the whole device, while each of the flanks 22 at a considerable angle eu this Aohse lies.

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Selbstverständlich.kann the outer sleeve 10 also be part of an overall \ fäßes or container, a T-piece, an elbow piece or similar #. Likewise, each of the pipe ends 13 and 14 can also be designed in one piece with a container, a pipe fitting or pitting or another object. The pipe ends 14 and 14 do not have to be processed or prepared in any other way, provided with a thread, but merely cut straight or at an angle and then inserted into the inner sleeves 11 and 12. The pipe ends can consist of many different types of materials, such as plastic, iron, cement, asbestos cement, etc. It is not necessary that two pipe ends to be connected consist of the same material and have exactly the same dimensions, since the device according to the invention is also suitable for Can use pipe ends whose diameters differ slightly from each other.

Next follows a more detailed description of the inner sleeves 12 and 12; these sleeves are with cylindrical inner surfaces 23 and provided, and their inner diameter corresponds approximately to the outer diameter the associated pipe ends 13 and 14, respectively. However, the two diameters do not have to match exactly before the Huff en in des? Sealing layer are wedged. So if the outside diameter knife one end of the pipe is a fraction of a centimeter smaller than the inner diameter of the associated socket 11, as long as this eioh nooh is about ia the middle of the outer sleeve 10, a good seal can nevertheless be achieved because

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the inner diameter of the sleeve becomes much smaller when the sleeve is brazed into its sealing layer under the action of a wedge, in which it is no longer in the middle of the outer sleeve. Such a change in diameter makes the onset a tube end in the connector according to the invention is very easy.

As already mentioned before, the inner sleeves 11 and 12 are with External threads 26 and 27 are provided which are adapted to be connected to the above-described corresponding internal threads 18 and can come into engagement. Those that belong together are useful Threads 18,26 and 19,27 completely complementary, as shown in the drawings, although of course in certain Deviations can also occur, such as interrupted threads. Since the threads shown are complementary, the external threads 26 and 27 also have radial planks which face away from the adjacent ends of the external sleeve and with the previously described radial ilanken 21 (Pig. 5), the point towards the end of the outer sleeve, cooperate. Hence can when rotating between the outer sleeve and one or both inner a very high sealing pressure can be achieved.

As already mentioned, the inner sleeves consist of a relatively soft material that can be processed by extrusion and is impermeable to flowable media, e.g. natural

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or synthetic rubber such as ITeoprene. It is to be noted that elasticity is not assumed, but deformability (since the inner sleeves are wedged into the ends of the outer sleeve be pressed in) is necessary. It is important that the material from which the sleeves 11 and 12 are made are of such quality is that the sleeves the outer surfaces of the pipe ends 13 and 14 grasp or clamp under friction, so that a rotary or axial movement between the pipe ends and the sleeves Resistance is opposed. Rubber and numerous synthetic or plastic compounds of a similar nature are for these purposes are extremely well suited. Although the inner surfaces of the sleeves are shown as cylindrical in the drawings they can, if desired, also be provided with annular inner beads, friction-enhancing elements, etc.

So that the desired axial displacement between the inner sleeves

11 and 12 and the outer sleeve 10 take place and thereby a can cause a strong wedge effect, there are sleeves 11 and

12 either of two parts or are so connected to each other, that they can be moved axially relative to one another.

In order to enable a greater axial displacement, the total length of the sleeves 11 and 12 should be considerably shorter than the internally threaded portion of the outer sleeve 10 "Then, if the! Parts relative to each other and their Abdient- chucking

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• Take the position in Pig. 2 is located between the sleeves 11 and 12 and also between the opposing pipe ends 13 and 14, a larger intermediate space 28. On the other hand, "before sealing and clamping... No space is needed between the pipe ends and the opposing ends Sleeve ends to be present instead, such spaces are then located in the area of the ends of the External sleeve, as in Pig. 3 shown at 29.

A suitable lubricant, e.g. grease or silicone powder, which does not attack the inner sleeve or the outer sleeve, is applied plotted the cooperating surfaces of the threads 18,26 and 19,27. Therefore and also because there is no fat between the surfaces 23,24 and the outer surfaces of the pipes is present, when turning the outer sleeve 10 on one or both pipe ends 13 and 14 or turning one of the pipe ends achieves the desired axial displacement between the inner sleeve and the outer sleeve, as shown in Figs.

The inclination or bevel of the frustoconical, Surfaces provided with interlocking threads opposite the axis of the device can, for example, be between 5 and 10 * be"

The inner sleeves 11 and 12 are initially approximately in the middle screwed into the outer sleeve, as shown in FIG. A pipe- !.

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end, e.g., pipe end 14, is then pushed into the connector. Then the pipe end 14 is relative to the outer sleeve 10 rotated, e.g. by rotating the pipe end 14 and holding the outer sleeve. The turning can be done in many cases done by hand, although especially with larger dimensions, a tool wrench is two-dimensional. The one on the outer sleeve 10 set keys should be designed in such a way that the outer sleeve is not damaged. When the outer sleeve is out If there is glass fibers, a key with a tightening strap is preferably used. The rotation takes place in such a Attention that the inner sleeve 12 and the pipe end with which it is connected by friction, is displaced near the outside, for example-i. wise from the one in Pig. 3 into the position shown. 2, By moving this closer to the outside, the inner sleeve becomes compressed in the manner described above under wedge effect and exerted a Abdioht- and clamping effect, what only does not the roaring held tight, but also losses of the fluid capable of flowing Medium to be avoided.

In particular when the outer diameter of the pipe end 14 (initially) slightly smaller than the inner diameter of the associated Socket, the pipe is tightened so that the necessary Kraftaohlüaalge tension is present to initiate wedging au.

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Next, the other pipe end 13 is inserted and in Proceeded in the same way to also seal and fix or clamp this pipe end.

The device according to the invention can not only be described in the above Way, but it is also possible to insert and connect the pipe ends at the same time by the outer sleeve 10 is rotated like a pipe union. Regardless the manner in which the device is placed on the pipe ends, the loosening and loosening of the seal occurs by reversing the method described, i.e. the inner sleeves 11 and 12 are again towards the center the outer sleeve 10 versohoben.

It is expressly emphasized that the pressure of the flowable medium in the pipe, which acts on the wide inner ends of the inner sleeves 11 and 12, further increases the wedge and sealing effect.

In order to increase the strength of the connecting piece when media are under very high pressure, wedge-shaped teeth 31 are provided at each end of the outer sleeve 10. How best * aua den Vig. 4 and 5 au, each of these teeth has an outer surface 32 which slides on the frustoconical inner surface 23 of the end of the outer sleeve End of the outer sleeve inclined to the horizontal. The inner surface 34 of each tootho

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is preferably at an angle to surface 33, as in Pig. 5, whereby the insertion of the pipe end 13 is facilitated. So each tooth has the shape of a wedge. Across the inner end of each tooth is a sharp cutting edge 35 is provided, which rests against the outer surface of the pipe and cuts into this surface when the pipe end is relative to Outer sleeve 10 is moved outwards.

From Fig. 4 it can be seen that the spline teeth 31 are spaced from one another are arranged on the circumference ^ and spacers between them 36 items that can consist of a soft plastic, e.g. vinyl. The ends of these spacers If desired, they can be connected to the sides of the Kcilzähne, so that a continuous ring is created that leads to the rope made of plastic and partly made of metal. The cross section of each spacer 36, viewed in the longitudinal direction, can be the same that of the clamping teeth (Fig. 5).

When inserting a pipe end, the connecting piece moves the ring formed by the teeth 31 and the spacers 36 extends in the longitudinal direction into a retracted position, which is shown in FIG Fig. 3 is shown. Dadnroh is inserting the end of the pipe not disabled. The toothed ring should be moved inwards so far that the teeth during the sealing and locking « process described in detail above is not excessive

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Cut deep into the pipe surface. Therefore, the Teeth only deeper into the pipe end when the device is in the proper. 2 sealing and locking position shown is located. This cutting results from the interaction between the inclined wedge surface 33 and the teeth 31 which move outwardly along it.

In this way, after sealing and locking, teeth 31 cause axial displacement or "creep" of the pipe end from the outer sleeve 10 to the outside as a result of a very high pressure of the flowable medium inside the pipe effectively prevented. When the pipe ends are moved outwards, the teeth intersect as a result of the wedge effect deeper so that the clamping effect is increased.

The following describes the manufacture of the inner sleeves and the outer sleeve described.

Like the Pig. Figures 6 and 7 show a cylindrical axle or shaft 37, the outer diameter of which is approximately the diameter of the pipe originates, in which the connector is to be used, on a device (not shown) about its longitudinal axis rotatably mounted. Several sets of elastomeric sleeves 11a and 11a 12a, which also serve as mold cores, are on this

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Shaft attached. They correspond exactly to sleeves 11a and 12a the often described sleeves 11 and 12, only they are so long, that the entire section of each of the two truncated cones of the outer sleeve 10, with an internal thread, can be formed on them. Bio sleeves 11a and 12a can, as shown, be arranged so that they abut or have a small distance from each other so that between them Resin-CELasfasesn. can be attached, which then has an inner Form waist or hansch.

It is an elastomeric internal wiper ring 38, the outer surface of which is shaped in such a way that the ear dear desired frustoconical inner surface 33 (ed. 5) corresponds to the finished outer sleeve, is on each Hope 11a or 12a, each at the end with the smaller Dorcbaesser, arranged. Between two adjacent Pormawiecbenringe 38 there is one radially protruding one Separating disk or slurry ring 39 which separates the outer sleeves from one another.

Then, a mass is applied to the SeIXe 11a, 12a and 38, which makes it possible that these parts 11a, 12a, 38 later from the Parts formed on it can be detached again how to command and also serve as such the scabbard. as Release agents can. * .B. Polyvinyl alcohol or various Sultones are used.

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Then in the actual i ¹ forming process on the between two cutting discs !! 39 arranged parts an outer sleeve is formed, the inner surface of which corresponds to the outer surfaces of the parts 11a, 12a and 38 Storage container 45 containing a liquid synthetic adhesive resin 46. The adhesive preferably consists of a mixture of an epoxy resin (or other synthetic adhesive) and a catalyst this! bath drawn and impregnated in the process.

Like in Pig. 8, the shaft 37 is rotated and pulls the impregnated strand 41 from the roll 43, so that the strand 41 is wound helically around the parts 11a, 12a and 38 will. In this way, several layers of helically wound strands can be produced, with the Resin-impregnated glass fibers precisely match the outer shape of parts 11a, 12a and 38.

According to flg. 9, the impregnated strand 42 is moved by a movable one guide part 47 passed, which is moved back and forth while slowly rotating the shaft 37 in the longitudinal direction of the shaft, so that the impregnated strand 42 in the longitudinal direction of the shaft 37

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is placed over the wound strand 41. In this way the strand 42 increases the strength of the finished outer sleeve in axial direction,

Then, as in Pig. 10 shown, the strand 41 are again wound on the outside of the strand 42, with which the The wrapping process is ended.

The resin is then hardened in the usual way, whereupon the outside of the outer sleeve expediently on any Way is smoothed. For example, a gel coating can be applied, or various pressing or other processing is carried out. However, the outer surface should not be made too smooth, as there is still enough friction should occur in order to facilitate the turning of the outer sleeve.

Next, the shaft and cutting disks 59 are separated from each other separately (Pig. 11). Then the Pormrings 38 removed by simply, like in Pig. 12 shown, depressed and taken out in the axial direction.

The parts 11a and 12a are finished into inner sleeves by simply cutting off their outer end parts. this can be done while using an internal cutting device the sleeves are still in the outer sleeve. Appropriate However, the parts 11a and 12a are trimmed after they have been removed from the outer sleeve, wherein - as in

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Fig. 15 shown - end pieces 11b and 12h, which have a smaller Have diameter, be cut off. The remaining portions of parts 11a and 12a that have a larger diameter then form the inner sleeves 11 and 12 described above,

Finally, the threads of the sleeves 11 and 12, as already mentioned above, provided with a lubricant, e.g. Pett, and again in the in the Pig. 13 and 14 in the manner shown in the outer sleeve 10 used. In this way, the lubricant also reaches the threads 18 and 19 of the outer sleeve

Because the inner sleeves themselves are used as pormen for wrapping no expensive pormen are required. Second, internal threads 18 and 19 can be produced using the elastomeric porms, that have no sharp edges. Thirdly, it is ensured that each outer sleeve corresponds exactly to the corresponding inner sleeve 11 and 12 fits.

The outer sleeve 10 is insensitive to corrosion or can be insensitive be made.

Pig. FIG. 17 shows an embodiment which can be used when the material of the outer sleeve 10 adversely affects the corrosion effect of the in FIG Tube ends 13 and 14 exposed to existing flowable medium is. In such a pail it is necessary to provide a seal between the adjacent ends of the inner sleeves 11 and 12

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which then prevents begging, hoping 11 and 12 together, that the flowable medium a \ t any rope of the outer sleeve 10 comes into contact.

More specifically, the seal 50 is made of a bellows-like Intermediate piece, the ends of which are sealingly connected to the opposing oden of the inner sleeves 11 and 12, wherein the bellows-like intermediate piece is so long that when it rotates between the pipes and the outer sleeve 10, the displacement of the Soffing 11 and 12 away from each other outwards into the sealing XeiXLage enables you to sift through 50 aas one Corrosion uneapf indliohen material.

If such a seal used (not shown) may be used, to prevent a rotation of the one relative to the other Hope Hope on *

In the case of the in fig. 18 are both the Outer muffs 10a as well as the drilling ends 13a and 14a with a Übersag was provided with a material that prevents this line from corroding. In addition, an approach 52 is provided which mim — iiii touched the im with the lane monkeys 11c and 12c Inside the medium with the outermost end faces (edges) the Bo2u £ prevented.

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More specifically, the outer sleeve 10a is thin-lined 53 made of a corrosion-resistant material such as polyvinyl chloride, acrylic styrene or another suitable Material provided. The lining has an internal thread 54 which corresponds to the internal thread of the outer sleeve 10a. In the illustrated Embodiment the ends of the liner 53 lie in annular grooves 55, which are at the extreme ends of the outer sleeve 10a are provided.

The tube ends 13a and 14a are, as shown, also provided with coatings 56 and 57 made of the same material as Lining 53 of the outer sleeve can be made.

Ser approach 52, the contact of the flowable medium with each extreme end of the tubes and thus corrosion of these Ends prevented, has a bead which protrudes radially inward from the inner ends of the inner sleeves 11c and 12c and is integral is formed with the respective sleeve. On the outer sides of the lugs 52, annular grooves 60 are provided which are dimensioned in such a way that they receive and seal the pipe ends provided with a coating in a tight or snug fit In the device according to FIG. 18, the pipe ends 13a and 14a provided with the coating are inserted into the inner sleeves 11c and 12c used, which are in their inner position. The pipe ends are pressed so firmly into the sleeves that their outer edges in an interference fit in the annular grooves 60 in the

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Flanges 52 are retained and sealed. aside from that If necessary, the outer pipe ends can be removed before insertion be coated with an adhesive ".

Then the pipe ends are relative to the outer sleeve 10a rotated in the manner described above so as to seal and lock as a result of the axial displacement of the sleeves 11c and 12c with respect to the outer sleeve 10a.

In the embodiment according to FIG. 19, the internal thread extends on the inner surface of the outer sleeve 10b continuously in the same direction over the entire length and is either a right-hand or a left-hand thread. The internal thread 19b in the truncated cone 17b thus runs in the opposite direction as the thread 19 in the embodiment according to FIGS. 1 to 5.

The inner sleeves 11d and 12 are provided with external threads that the threads 61 and 19b are complementary. These threads are denoted by 62 and 27b, respectively.

The embodiment of FIG. 19 is used in the same way as the other devices, only when the outer sleeve 10b is rotated simultaneously on both pipe ends 13 and 14, both pipes are not moved into the sealing position at the same time.

It should again be noted that the middle part of the

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Outer sleeve 10 in one piece with the wall of a container or. a line can be formed or attached to this. In such a case, one half of those according to the invention is omitted Pipe connection so that the container wall together with the remaining half, which is an inner sleeve and a pipe end has, forms a piece.

Emphasized with respect to all embodiments of the inventions that the expression "truncated cone" and the like. The invention, In particular, the claims are not intended to be restricted to sleeves that externally have the shape of a truncated cone. The illustrated, Externally frustoconical! parts are, however, for reasons of economic production, low weight, etc. extremely practical, but of course the construction of the inner parts of the sleeves is an essential part of the invention, and the external shape is relatively insignificant.

The sleeves shown can of course also be used for pipe sections smaller diameter are used, for this it is only necessary that the sleeves are thicker than those shown Examples are.

In some cases, water can also be used as a lubricant for the threads. When a permanent connection is established a lubricant that slowly evaporates can be used.

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You can use the pipe connection, especially if the Midsection of the anterior mullet oblong, also to be used as an extension In some cases, yor-

Certainly there may be a certain degree of satisfaction Allow slippage between the drill hole and the inner openings, whereby the effect of the connection is strengthened.

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Claims (12)

Sept. 16, 1968 P 15 25 851.8 P ¥ / Hd / ki., SOHEL, a Partnership * ο Case 65: 593 patent claims 1. Pipe connection for threadless and socketless drilling ends, in which the bracing or clamping of the pipe ends by means of the surrounding pipe end, with frustoconical outer surface provided inner sleeve parts made of flexible, sealing material and these Inner sleeve parts surrounding outer sleeve parts takes place, the with frustoconical and inclined towards each other Provided inner surfaces, the inner and outer sleeve parts being movable relative to one another for bracing in the axial direction are, characterized in that for each of the two pipe ends to be connected to each other (13t 13a and 14 »Ha) an independent inner sleeve (11, 11a, 11o or 12, 12a-d) is provided, and the two inner sleeves in themselves have, in a known manner, frustoconical and mutually inclined outer surfaces that, in the case of inner sleeves, have a single common outer sleeve (10, 10a) are surrounded, which has two frustoconical and mutually inclined inner surfaces, and that the Outer sleeve on the frustoconical inclined Inner surfaces opposing internal threads cooperating with external threads of the internal sleeves, such that the Inner sleeves by turning the outer sleeve (10, 10a) relative Movable in opposite directions to the pipe ends in the axial direction are. 2. Pipe connection according to claim 1, characterized in that that the interengaging threads of the outer sleeve (10, 10a) and the two inner sleeves (11, 11a, 11c or 12, 12a-d) in a known manner as a buttress thread are educated. 909817/0552 3. Pipe connection according to claim 1 or 2, characterized! that each inner sleeve (11, 11a, 11c or 12, 12a-d) is significantly shorter than the associated, internally threaded rope of the inner surface of the outer sleeve (10). 4. Pipe connection according to one of claims 1 to 3, characterized in that in each inner sleeve (11, 11a, 11c, or 12, 12a-d) in a known manner a threadless cylindrical end of a tubular part is arranged, and that the outer diameter of the end of the tubular! Deils is so small that this end is easy can be used in the inner sleeve when it extends approximately to the end of the Outer sleeve (10, 10a) is screwed, but that the outer diameter of the end of the tubular rope is so large that it is frictionally clamped by the inner sleeve and is locked when the inner sleeve in the direction of the end having the smaller inner diameter of the Outer sleeve is screwed. 5. Pipe connection according to one of claims 1 to 4-, characterized characterized in that the outer sleeve (10a) on its inside with a lining (53) having a thread is provided. 6 · Pipe connection according to one of claims 1 to 5, characterized characterized in that a seal (50) is provided which with the first and the second inner sleeve (11 and 12) is sealingly connected and prevents a flowable Medium passes between the two inner sleeves and comes into contact with the outer sleeve (10a), and that the seal is designed so that it a displacement of the two inner sleeves in the longitudinal direction and relative to each other. 909817/0552 7. Pipe connection according to claim 6, characterized in that » that the seal consists of a sealing bellows (50). 8. Pipe connection according to one of claims 1 to 6, characterized characterized) that each of the two inner sleeves (11c, 12c) at the end with the larger outer diameter each one radially inwardly projecting annular extension (52), and that each annular extension is an annular extension ! Tut (60) has »in one end of the to be connected Pipe end (13a or 14a) engages. 9. Pipe connection according to one of claims 1 to 8, characterized characterized in that in a manner known per se, in addition to the sealing sleeves (11, 12), locking devices (31) are provided, the axial displacement caused by the pressure of the flowing medium in the outer sleeve (10) one arranged in an inner sleeve end of a tubular (part (13 or 14) prevents, and that the locking devices in the outer sleeve (10) arranged, wedge-shaped teeth (31) which are arranged and designed so that they (at 35) in the Surface of the end of a tubular part (13 resp. 14) and prevent axial displacement of the end of the tubular part relative to the housing (10). 10. Pipe connection according to one of claims 1 to 9, characterized characterized in that the internal thread of the external sleeve (10) and the corresponding external thread of the internal sleeves (12, 11) are designed so that when the outer sleeve is rotated in a certain direction, both Ends of the two tubular ropes (13 and 14), which are shown in the opposite ends of the inner sleeve are inserted, are sealable. 909817/0 5 52 11. Pipe connection according to claim. 9, marked! that the outer sleeve (10) on ropes located radially outside the teeth (31) has truncated conical inclined surfaces, which in the of the outer sleeve facing away from each other are inclined, so that a wedge effect between these surfaces and the teeth can be generated. 12. Pipe connection according to claim 11, characterized in that spacers (36) are arranged between the teeth (31) and at each end of the outer sleeve (10) together with the teeth form a practically uninterrupted ring. The patent attorney 90981 7/0552