DE2911448C2 - Pipe connection - Google Patents

Description

3. Pipe connection according to claim 1 or 2, characterized in that the bushing (188) lies in the cylindrical widenings (172) of the pipes adjoining the flared portion (4) (Fig. 1 to 3).

4. Pipe connection according to one of claims 1 to 3, characterized in that the split bushing (188) at the joint (204) has an inner seal (202) and an outer centering (194, 1%) by means of a flange part (192 ) arranged circumferential shoulder (196) and in the other w flange part (190) arranged, in the shoulder (1%) engaging concurrent projection (194) (Figs. 1 to 3).

5. Pipe connection according to one of claims 1 to 4, characterized in that a between the inner ring (210, 212) and sleeve (188) to the pipe interior and to the outside sealed cavity by inner seals (168,202) on the sleeve (188) and through outer seals (50) is formed on the inner ring (210, 212) and that the sealed cavity has a screw nipple (214) or the like inserted into a wall opening for connecting a line (FIG. 3).

6. Pipe connection according to one of claims 1 to 5, characterized by at least one M radial projection (206) on each bushing part (188) and a corresponding recess (208) in the region of each pipe end (Fi g. 1.3).

7. Pipe connection for pipes with flared ends and with an inner ring engaging in the opposing flares of two tubes and an outer ring which overlaps the two flares and can be held together by a closure member, in which the sliding surfaces of each flare and the inner ring or outer ring are spherical surfaces or the one designed as a spherical surface, the other as a conical surface, with grooves for inserting a seal, optionally being provided in the inner ring, characterized in that at least one of the end surfaces of the flange (4) is angled obliquely to the pipe axis and that the inner ring in two ring parts with sleeve-like extensions (104, 106) which can be screwed into one another and which are offset in such a way that the screw thread on the one hand on the inside on the offset part (108) of the outer extension (106) and on the other on the outside on the non-offset n part of the inner extension (104) lies, while a seal (116) lies between the recessed part (112) of the inner extension (104) and the recessed part of the outer extension (106), and that the threaded area of the inner extension (104 ) is covered by a cover plate (118 ) extending from it and slidably resting on the stepped part (108) of the extension (106) on the outside, and the outer ring is divided into two outer ring parts (122), each of which on the outer surface (38) of one of the two opposing flanges (4) and that closure means (128, 130) lie between the two ring parts (122) in the longitudinal direction of the pipe axis (FIG. 4).

8. Pipe connection according to one of claims I to 7, characterized in that the center points (12, 14, 78, 80) of the curvature diameter of the spherical surfaces of a flange (4) lie at a distance from one another on the pipe axis (Fig. 9.8 ).

9. Pipe connection according to one of claims 1 to 8, characterized by sleeve-like on both sides Extensions (152) of the outer ring (150) which can be held together by clamping means (34) (Fig. 9).

The invention relates to a pipe connection for pipes with flared ends, with the features of Preamble of claim 1.

In DE-PS 4 53 910 and 9 76 049 are liquid-tight Pipe couplings described in which the spherically flared pipe ends between a Outer ring and an inner ring are held. There is only a limited number of these pipe connections Angular mobility is only given by the different flared pipe ends. The pipe connections are not designed for high loads.

Furthermore, from US-PS 27 78 671 a pipe coupling is known in which the perpendicular to the pipe axis lying flared pipe ends should be axially aligned. The pipe connection is only made with With the help of an outer ring into which an elastomer ring is inserted. An angular misalignment is only due to the Resilience of the material of this elastomer ring is possible to a very limited extent.

The assembly of pipes with all known pipe connections can only be done at the end of one Pipeline to be carried out, as to join the pipe ends perpendicular to the pipe axis a large axial path is required, which is only given at the end of a pipeline Pipe sections can therefore only be joined or separated progressively one after the other.

The invention is based on the object of a highly stressable consisting of a few individual parts To create a pipe connection that allows pipe laying that can be easily adapted to the terrain without any axial displacement of adjacent tubes and less expensive and space-saving storage of the individual parts of the pipe connection. The pipe connection should be both under negative pressure can be used as auciY with overpressure and seal the most diverse media perfectly.

The features of the invention that are essential for solving the problem are set out in claim 1 called. The subclaims name execution guidelines the invention.

With the pipe connection, with relatively little flaring of the pipe ends and thus also the possibility of stacking the pipes relatively tightly, an increased pivot angle within the pipe connection compared to the prior art is achieved.The angular mobility of the pipe can be given continuously so that the pipes are smaller Shifts can easily follow, but it is also possible to use an angle that has been set! ascertain. The pipe ends are shaped in the same way so that protection can be achieved with a single cover cap shape during storage and transport. The remaining parts of the pipe connection r> can do without transport protection when screwed together, since all functional surfaces are protected inside.

It is on the green of the formation of the pipe connection It is easily possible to lay longer pipelines in the field and thereby reduce thermal expansion consider replacing damaged pipes and subsequently inserting branches and slides.

Without needing the possible angle of movement lying in the pipe connection itself, which is for the Overcoming uneven terrain and assembly inaccuracies is sufficient, the pipe ends by twisting the opposing, angled pipe ends by twice the oblique angle of the pipe ends. In this way, pipelines can also be formed in bends with almost lay any radius of curvature, for example along a road, an embankment of a railway line, And this, if the radii are not too small, without additional components. ■ -> ■>

It is particularly advantageous to lay out a pipeline in a slight zigzag line. In this case, the pipeline can compensate for differences in length and vibrations without any significant increase in material stresses simply by shifting the couplings slightly on the ground. No additional parts are required for this and the extension of the line remains within small limits. The Sirömungsverluste in the pipeline are due to have always stood on the pipe connection to the 'n · available. The rapid pipe cross-section and the rounded transitions possible there are small. Laying the pipeline in a slight zigzag line also makes it possible to replace any pipe in a finished pipe without having to loosen the two connecting pipe connections. With exclusive use of the angle of movement present in each pipe connection, it is possible, after loosening the pipe connection, to pivot the pipe ends so far that a one-piece inner ring, which cannot be changed in length, can also be removed. Furthermore, it is possible to insert other line parts at these points, since the distance between the pipe ends can be increased when inclined pipe ends are used so that branches or slides can be inserted without any problems.

Due to the mobility of the pipe ends in the pipe connection in connection with the adjustment option the angular position between the individual pipe backs, several construction teams can work at the same time Start laying a pipeline at various points, with any gaps that may arise between two lines can be easily closed using bends.

The drawing shows embodiments of the new pipe connection. It shows

Fig .; a partial section through a pipe connection a first embodiment,

F i g. 2 shows a partial section through the pipe connection according to FIG. 1 in a different angular position,

F i g. 3 shows a partial section through a pipe connection of a second embodiment,

F i g. 4 shows a partial section through a pipe connection of a third embodiment,

F i g. 5 is a plan view of one in the embodiment according to FIG. 4 used outer ring,

F i g. 6 shows a side view of an in the embodiment according to FIG. 4 used outer ring,

F i g. 7 and 8 show, in partial section, the different shapes of the flanges on the tubes Example of non-angled pipe ends,

Tig.9 a partial section of a pipe connection with Device for eliminating angular mobility using the example of a pipe end that is not angled here.

According to Fig.) To 3 is a straight Rohrsiück 2 with a flared pipe end 4 is provided. The flared pipe end 4 has a spherical shape Outer surface 6 and a spherical inner surface 8. The flared pipe end 4 ends in a leading edge 10. The leading edges 10 form an angle smaller than 90 with the longitudinal axis of the straight line Pipe pieces 2. If the flared pipe ends are spherical, it is circular Front edges 10 guaranteed.

A cylindrical widening 172 is between the straight pipe section 2 and the flared pipe end arranged and takes on a two-file 188 rifle. The parting line 204 of the liner halves 188 is inclined at the same angle with respect to the longitudinal axis of the straight pipe sections 2, as the Front edge 10 of the flared pipe ends. In the area of the parting line 204, there are 188 Flanges 190, 192 are provided. One Flausen 190 is provided with a circumferential projection 194, while the flange 192 has a circumferential shoulder 1%. The Vorspning 194 intervenes in the paragraph 1% and thereby centers the sleeve parts 188 against one another. The joint 204 is sealed by a A sealing ring 202 arranged in a groove 200 is achieved. Each sleeve member 188 is opposed to rotation

the corresponding cylindrical upgrade 172 by a radial projection 206 secured, which is in a corresponding recess 208 in the cylindrical Expansion 172 engages.

The flanges 190, 192 are enclosed by an inner ring consisting of two parts 178, 180, the rests with side surfaces 186 on the flanges 190,192. The Inncnringteil 178 is provided with a sleeve-like extension 182 with an internal thread, while the inner ring part 180 has an external thread 184 which is screwed into the sleeve-like extension 182 is. The outer ring 24 is divided in its cross-sectional plane and is held together by means of clamping screws 34.

In this embodiment there is a double angular mobility between opposing Given pipe ends. Due to the gap between the leading edge 10 of the flared Pipe ends and the shoulder 30 in the outer ring 24 can be the flared pipe ends between the Swivel the inner ring parts 178, 180 and the outer ring 24 through a small angle. Additionally you can but the opposite, flared pipe ends against each other up to the one in Fig. 2 shown angular position are rotated. In this way, with the inclusion of a den Flow resistance reducing bushing, a simple laying of a pipe with inside Lay the angle between the individual pipe sections at an adjustable angle within the specified limits.

In the embodiment and FIG. 1 and 2, the pipe joint is sealed exclusively by in the sleeves 162 and 188 arranged seals 168, 202 reached. In Fig. 3 are additional seals 50 in Grooves 48 of an inner ring 210, 212 consisting of two parts are arranged. Furthermore, a seal 198 in the screw connection of the inner ring parts 2iö, 2i2 is provided. This creates a between the inner ring parts 210,212 and the sleeve parts 188 sealed space created, which via a screw nipple 214 from the outside is accessible. This screw nipple 214 can either be used to carry out a leak test or else a sealant can be pressed into the space.

The pipe connection shown in Fig. 4 allows larger distances between individual pipe sections to overcome with flared angled pipe ends 4, which z. B. when meeting Pipeline sections laid by different construction crews can be advantageous. Between the flared Pipe ends 43 is an inner ring, consisting of inner ring parts 104, 106 that can be screwed into one another set. For this purpose, the one inner ring part 104 is provided with an external thread 110, while the has another inner ring part 106 with a socket with an internal thread 108. A cylindrical extension 112 cooperates with the inner ring part 106 in a sealing manner, with the inner ring part 106 cooperating for this purpose an annular groove 114 and seal 116 inserted therein is provided. A cover in the form of a sheet metal tube 118 protects the exposed parts of the external thread 110. There are blind bores in the inner ring parts 106,104 120 arranged, in which hook wrenches can engage to the two inner ring parts 104, 106 to twist against each other. The sealing of the inner ring parts 104, 106 against the flared sides The pipe ends 4 are made by sealing rings 50 inserted in grooves 48.

Each outer ring 122 engages behind with its outer ring part 124 a flared end 4, the opposing outer rings 122 by means of clamping screws 128 and nuts 130 against each other axially braced. The outer rings 122 are - as FIG. 5 and 6 show - also carried out and divided have overlaps 132 in their central plane, which can be connected by means of connecting screws 134 are. Depending on. how large the distance from opposite flared pipe ends 10 is, the inner ring parts 106, 104 are screwed into one another to different extents and with the outer rings 122 the flared pipe ends 10 clamped. In this way, considerable differences in distance can be c overcome between opposing flared pipe ends 10 without this causing installation difficulties leads.

In the example shown in FIG. 2, the center point 12 of the outer spherical surface 6 and the The center point 14 of the inner spherical surface 8 do not coincide, but lie on the pipe axis.

The pipe connection between the opposite flared pipe ends 4 consists of an inner ring 16 and an outer ring 24. The inner ring has an inner diameter that corresponds to the Corresponds to the inner diameter of the straight pipe section 2.

It is flared with the inner surfaces 8 of the Pipe ends 4 cooperating spherical surfaces 22 limited, in each of which a groove 18 with a sealing ring 20 are arranged. The outer ring 24 has the flared pipe ends 4 engaging behind parts 26, the inner spherical surfaces 28 rest on the outer surfaces 6 of the flared pipe ends 4. The spherical surfaces 28 are closed by a first delimitation 29, the diameter of which is greater than that Outside diameter of the straight pipe section 2, but smaller than the diameter of the leading edge 10 of the flared pipe end 4. A second limitation is formed by paragraphs 30, which one inward Form protruding, circumferential projection 32 in the outer ring 24. The outer ring is in its transverse center plane divided and held together by means of clamping screws 34. During assembly, the inner ring is first 16 placed between the flared pipe ends 4. Then the outer ring halves are over the flared pipe ends 4 placed and clamped against each other by means of the clamping screws 34. at This embodiment, the outer ring 24 is dimensioned so that the expanded pipe ends 4 between the inner ring 16 and the outer ring 24 are clamped, so that no mobility in the assembled state given is.

However, it is also possible to form the outer ring 24 with a slight play compared to the flared To provide pipe ends 4, so that an angular mobility of the flared pipe ends 4 up to the stop the leading edge 10 at paragraphs 30 is possible.

This embodiment is advantageous if during the production of the flared pipe ends 4 no simultaneous upsetting should be carried out, since in this case the wall thickness of the flared Tube end 4 decreases with increasing diameter.

In the embodiment and FIG. 8, the straight pipe section 2 is followed by a flared pipe end 4 on, with spherical outer surfaces 6 and spherical inner surfaces 8, the centers of curvature 78, 80 do not coincide and are arranged so that on the front edge 10 of the flared pipe end 4

if there is a greater wall thickness. than in the area of the transition to the straight pipe section 2. This allows a groove 82 for to provide a lip seal 84, with an inner ring 86 placed between the flared pipe ends 4 Kugelflüchcn 90 is provided with a circumferential groove 88 with parallel side wall surfaces 89. One in his Transverse center plane split outer ring 92, which is held together by clamping screws 34, has the Flared pipe ends 4 outer ring 92 reaching behind and held together by clamping screws 34 is, the flared pipe ends 4 engaging behind outer ring parts 94, with spherical surfaces 96 on the spherical surfaces 6 of the flared pipe ends 4 rest. The spherical surfaces 96 end in a first Limitation 98 and a second limitation in the form of paragraphs 100, which are in a circumferential projection Skip iG2. This all-round lead iO2 takes effect into the groove 88 of the inner ring 86. whereby a mutual centering of inner ring 86 and Outer ring 92 is reached. In this embodiment, too, by appropriate dimensioning of the Outer ring 92 either a bracing of the flanged pipe ends 4 between the inner ring 86 and the outer ring 92 can be achieved, so that after tightening the clamping screws 34 no angular mobility the flared pipe ends 4 is given to each other, or there can be a little play between the inner ring 86, the flanged pipe ends 4 and

■■> be provided to the outer ring 92, so that after Laying a pipeline with this embodiment a pipe connection, the angular mobility remains.

The previously described options for training

Hi circuit of the angular mobility in the pipe connection were based solely on radial tensioning of the inner ring, the flared pipe ends and the outer ring. In the embodiment shown in Fig. 9, the inner ring 46 is unchanged,

! ■> an outer ring 150 is, however, with both sides. sleeve-like extensions 152 are provided, which extend the straight pipe sections 2 over a greater length encompass. The outer ring i5ö with the sleeve-like extensions 152 is also in its transverse center

2 »plane divided and forms half-shells which are clamped by means of clamping screws 34. In this way the flared pipe ends 36 are relieved, so that it is possible with such a pipe connection to bridge larger distances floating freely.

In addition 7 sheets of drawings

Claims (2)

Patent claims: 1. Pipe connection for pipes with flared ends and with an inner ring engaging in the opposing flares of two tubes and an outer ring which overlaps the two flares and can be held together by a closure member, in which the surfaces of each flare and the inner ring or outer ring that slide against one another are designed as spherical surfaces or one is designed as a spherical surface, the other as a conical surface, and wherein grooves for inserting a seal between the slidably abutting surfaces, eg. B. are provided in the inner ring, characterized in that at least one of the end faces of the flare (4) is angled obliquely to the pipe axis and that the inner ring is divided into two ring parts (178, 180, 210, 212) which can optionally be connected to one another by a thread and that in an intermediate space between the ring parts on a substantially cylindrical sleeve (188) which can be pushed into the pipe ends, an externally circumferential flange (190, 192) engages the ring part walls (186) and that the sleeve (188) with its ends. ^ rests longitudinally displaceably on the inner wall of a tube (2), the bushing being divided by a joint (204) which also divides its flange into adjacent bushing parts (188) at an angle to the axis of the tube, and the flange is at least so long that it is also at maximum The bend of the ear branch still protrudes into the space between the inner ring parts (188) on the opposite side of the ear (Fig. Ibis 3). 2. Pipe connection according to claim 1, characterized by the convex design of the pipe inner wall (2) adjacent. End regions (170) of the sleeve