DE2721050C3 - Compensator arrangement to compensate for changes in length in the pipeline - Google Patents

Description

realized.

In the simplest case, the cable strands can have a swivel joint at the deflection points, for example in such a way that the line strand tapering to the swivel joint is offset perpendicular to the pivot plane relative to the running line strand and the both strands are connected to one another by a swivel connection. The wiring harness changes the flow level for each swivel joint.

For higher loads, especially with regard to the operating pressures, it is useful if the cable strands have a bellows at the deflection points. There is no need to offset the incoming line loom in relation to the outgoing line loom, so that each line loom runs within a plane and the deflection losses are lower. The use of angular expansion joints is particularly favorable here. Because be ^: they absorb the tensile forces resulting from the internal pressure directly from the joint. This makes it suitable for particularly high internal pressure loads. In addition, the division according to the invention into two or more cable strands ·· bsi the use of bellows compensators has the advantage that the reduction to compensator diameters of the same cross-section increases their angular mobility disproportionately.

To produce the swivel connection at the points of curvature of mutually mirror images Cable strands, it is recommended to use the two strands perpendicular / ur swivel plane by at least the diameter of a cable strand against each other / u move, d. h .. to move the strand as a whole, so that there is no increase in the deflection points. For swivel mounting, only one is required in the Swivel plane arranged bolts. which is routed on both cable strands.

In order to prevent the cable strands / u from sagging, it is best to place them at the deflection points and / or support intersection points. This can be achieved in particular by horizontally displaceable supports, take place, for example, in the form of plain bearings.

A terminal crossing point expediently functions as the fixed point of the compensator arrangement with an adjoining switch through which the Pipeline is divided into the two mirror-inverted strands. So also -he to the switch connected strands of cables can participate in the compensation movement, they are each over an elastic connection to the switch is ruled out.

Are particularly long transport lines / u kompen sate. it is best to have two shearetid orders to switch one after the other and wipe the fixed point there to lay.

To reduce the deflection losses in the angular expansion joints, it is recommended that these in Have a protective tube inside the bellows part

Finally, there is also the option of using the mirror figuratively to each other running line '. strands under Ver / icht on individual capacitors on their to be made elastic over the entire length, for example by using corrugated hoses.

An embodiment of the invention results from the following description with reference to the drawing; thereby shows

Fig. 1 shows the Kompeiisierungsänordnung in a schematic Representation and

F i g. 2 an example of the swivel connection at the crossing points.

First of all, with the help of the dash-dotted lines in FIG. At a fixed point A , two legs a and b are articulated and run from there in a mirror-inverted manner outwards to two outer deflection points B and C. From point B , another leg c runs inwards parallel to leg b. In a mirror image of this, a leg d runs inwards from point C parallel to leg a . At the intersection point Ü of the two legs c and d , they are pivotably connected to one another. From point D the legs can continue to form a new scissor parallelogram. The leg lengths always remain the same, so that the outer deflection points and the intersection points each lie on parallel straight lines.

Due to the articulated connection of the legs with one another, point D can be shifted to the right while point A is held, whereby points B and C move diagonally inwards. Grolie by connecting several '■ · .nerengitter can Lange changes will be incorporated in reL.tiv narrow width changes to the system. Of course, the movement can also be initiated at point A. In order to be able to use this principle for the expansion compensation of pipelines, the pipeline 1 is divided in a branch 2 into an upper and a lower line strand 3 and 4, respectively. Both pipe strands initially run at different heights through an angular compensator (only the upper compensator 5 for the conduit 3 is visible in FIG. 1) and are then deflected to the outside in a mirror-inverted manner. An angular compensator 6 or 7 is seated at the outer deflection points B and Γ. da'o the bending angle of the expansion joints is around zero! when the chord has absorbed 50% of the maximum expansion. This makes optimal use of the angular mobility of the compensators. Instead, the swivel connection can be designed, for example, as a tubular joint or as a tight torsion compensator.

Starting from the compensators 6 and 7, the line strands 3 and 4 are deflected inwards again to the intersection point D. Both line strands are there by a swivel bearing, which is shown in FIG. connected with each other. The strands of wire then run to form further shear ends. which are structured in the same way as the one previously described.

The angle at which the legs a, b. c and d of the individual scissor links - swiveled out of the scissors longitudinal stretching ' ₍ e) is decisive for the effectiveness of the scissors. The greatest expansion in relation to ci.iN width growth occurs at angles of 90; then, however, the limlenk losses also reach their maximum.

The Elbows over the whole area between the outer extreme points and the inner points of intersection extend. A course similar to a sine curve then arises.

The line lengths running in mirror image to one another can also be designed to be elastic in themselves are, for example, in the form of corrugated tubes. With sufficient angular mobility of the same

the outer angular expansion joints 6 and 7 can be omitted.

F i g. 2 shows the swivel mounting at the crossing points. The crossing pipes point to this 8 and 9 each have a reinforcement 10 and 11 on their facing ropes. In both reinforcements there is a hole in the pivot axis in which a common bearing slide 12 is seated. the As a result, pipes can execute a defined pivoting movement.

"Of course, other rotational positions are also possible." in question. Should a sideways migration from [the specified swivel plane be permitted, articulated connections are used.

To compensate for large transport lines such as district heating lines, it is advisable to combine two compensation elements at one point, i. h "one uses a Kompensationselctneni, ucia 3UWUI1I lUr uiC ΐ ^ ί; ιϊΠϋΠϊ: οαίίΓΠΠιΪΜΐϋ ilGIj ίϊμ K G! TiϊΤϊΟϊΐ" which is designed as well as for the expansion of the running line strand The fixed point of this expansion element is in the middle of its longitudinal extension.

The pivot plane is arbitrary per se, but preferably horizontal. Your support to avoid it Inadmissible bending of the Leilungsstrangen can take place by means of known floating bearings.

In order to reduce the Uriiicnkvcflusle in the angular expansion joints, they can have a smooth inner lining or, for example, a protective tube fixed to a flange. With larger angular movements of the angular expansion joint, it is advisable to let protective tubes run inwards from both flange sections of the Kompcrisalöfs, with one protective tube with a protective tube. cüi certain game! into the other one runs out. s ^{sn c} 'nU both protective tubes are angularly movable relative to one another.

1 sheet of drawings

Claims (13)

Patent claims: 1. Compensator arrangement to compensate for changes in length in a pipeline, dividing the pipeline into at least two strands which are approximately arcuate in mirror image to one another, the legs of each pipe bend being angularly movable to one another, characterized in that each line strand (3, 4) has several successive bends that intersect with the arches of the neighboring strand and that the strands of lines (3, 4) are pivotably connected to one another at the crossing points (D). 2. Compensator arrangement according to claim I, characterized in that the cable strands (3, 4) have a swivel joint at the deflection points (B, C). 3. Compensator arrangement according to claim 2, characterized in that the swivel joint Incoming wiring harness opposite the outgoing wiring harness perpendicular to the .Schwenkplane offset and is coupled to this by a pivot connection. 4. Compensator arrangement according to one of the preceding claims, characterized in that the cable runs (3, 4) at the deflection points (B. C) have an elastic connection and each cable run runs in one plane. 5. Compensator arrangement according to claim 4, characterized in that the elastic connector dung is a bellows. 6. Kompensatoranotdnung according to claim 4, characterized. Δ ^ ^r i the elastic connection is an angular compensator (6, '). 7. Compensator arrangement according to claim 1. 2.4, 5 and b. characterized in that the line strands (3, 4), which are mirror images of one another, are perpendicular are offset from one another to the pivot plane by at least the diameter of a cable strand. 8. Compensator arrangement according to one of the preceding claims, characterized in that the cable strands (3, 4) are supported against sagging at the deflection points (B. C) and / or the crossing points (D). 9. Compensator arrangement according to one of the preceding claims, characterized in that a terminal crossing point (A) with an adjoining switch (2) acts as a fixed point 10. Kompensatnranordnung according to claim 9, characterized in that the cable strands (3, 4) are each connected to the switch (2) via an elastic connection. 11. Compensator arrangement according to one of the Claims I to 8, characterized in that the Fixed point is arranged between two consecutive len Sche / en arrangements. 12. Compensator arrangement according to claim h. characterized in that the angular compen Sator (6, 7) has a protective tube inside the bellows part. 13. Compensator arrangement according to claim 6, characterized in that the Leilungsslränge (3, 4) are designed to be elastic over their entire length, dispensing with individual compensators, The invention relates to a compensator arrangement for compensating for changes in length in a pipeline dividing the pipeline into at least two strands that are mirror images of each other approximately arcuate, with the legs of each pipe bend being angularly movable with respect to one another. Such a compensation arrangement has become known from DE-PS 1 30 270. There are two Opposite U-shaped cable strands are provided, in which the flexible pipe section £ across direct connection of the connecting flanges run, s <> that they have a Go through a lateral shift. For the inclusion of very large changes in length, such as those for example C ^ i district heating pipes occur is this arrangement not suitable. In the case of district heating lines, for reasons of economy, the aim is as long and continuous as possible Pipe sections with only a few compensation lines. Because because of the underground laying of the District heating lines have to be built for the compensation points. For the Example of a pipe section of 2000 m in length and a hot water temperature of IbO C results in a necessary expansion absorption of about 4000 mm. The mastery of such length changes is at Pipe diameters on the order of 1000 mm and operation <> press on the order of magnitude from 50 bar very costly. Also the tube bundle expansion joint according to DF-PS 4 38 653. in which the pipeline is divided into five individual ones I. Yrabows is divided. is for great changes in length gen unsuitable. Because the above-mentioned division primarily serves to simplify production and achievement equal stress on all Finzel pipes. Above all, should be achieved by the crown shape that the resulting force when the compensator deflects runs in the center and the connecting flanges maintain their mutually parallel position. Finally, through the HR-PS 22 18 528 a Expansion compensator known, which consists of a zigzag bent piece of pipe, the legs of which by their angular movement for compensation of length changes in the pipeline are available stand. Proceeding from this, the object of the invention is then to provide a compensation system for extremely large To develop changes in the length of a pipeline, such as occur, for example, in district heating pipes. This object is achieved according to the invention by that every first line strand has several successive ones Has arcs that are aligned with the arcs of the neighboring strand cross / s and that the cable strands are pivotally connected to one another at the crossing points are Due to the intersecting arrangement of the Leilungs strange and thanks to their pivoting connection to the The compensation takes place practically at points of intersection according to the principle of the Nuremberg scissors This means dalt a very large change in length in a multitude small changes in width is transformed, whereby the The sum of the changes in width is smaller than the total change in length when working with large opening angles of the individual scissor links works. In contrast, none of the three prior publications mentioned is a real crossover adjacent cable strands and in no case is the decisive factor for the principle of the invention pivotable connection at the crossing points