WO2001054891A1

WO2001054891A1 - Device and method for producing a tubular multi-layer curable repair liner

Info

Publication number: WO2001054891A1
Application number: PCT/DE2001/000201
Authority: WO
Inventors: Ralf Odenwald; Lars Quernheim; Dietmar Voigt; Norbert Hain; Klaus-Dieter Fischer
Original assignee: Bkp Berolina Polyester Gmbh & Co. Kg
Priority date: 2000-01-25
Filing date: 2001-01-18
Publication date: 2001-08-02
Also published as: AU3913201A; DE10002960A1; DE10002960C2

Abstract

The invention relates to a device for producing a tubular curable multi-layer repair liner (29) on a conveyor path. Said conveyor path comprises a conveyor section in which a liquid-tight tubular film (2) is fed as the interior layer of the tubular repair liner (29), and subsequent conveyor sections in which additional tube layers (21, 25) are wound onto the tubular film (2), and at least one intermediate layer (21) is impregnated with a curable material (28). In a conveyor section an expansion element (9, 10, 11, 12) disposed inside the tubular film (2) is contactlessly retained in the direction of conveyance (3) by means of a retainer. In the conveyor section comprising the expansion element (9, 10, 11, 12) a deflection device (4, 6, 7) is provided as the retainer for the tubular film (2), said deflection device retaining the expansion element (9, 10, 11, 12) inside the tubular film (2) in the direction of conveyance.

Description

Device and method for producing a multi-layer curable rehabilitation hose

The invention relates to a device for producing a curable multi-layer rehabilitation hose on a conveyor line, with a route section on which a liquid-tight film hose is supplied as the inner layer of the renovation hose, and with subsequent route sections on which further hose layers are handled around the film hose and at least one intermediate layer is impregnated with curable material, a widening element located in the film tube being held back in the conveying direction by a retaining means without contact on a stretch of line, and a method for producing a curable multi-layer rehabilitation hose, whereby at least one widening element is initially threaded through the thread during the initial threading of the film hose open tube end is inserted into the film tube and is held contactlessly on a conveyor section in the conveying direction.

Such a device and a corresponding manufacturing method have become known for example from DE 44 27 633 AI.

Damaged pipelines that cannot be walked on can be rehabilitated using so-called relining processes, in which a rehabilitation hose consisting of hardenable molding compounds is used a defective pipe is drawn in and cured into a new pipe.

In the manufacturing method known from DE 44 27 633 AI, a multi-layer rehabilitation hose with a film hose (referred to as an inner calibration hose) as an inner layer, with an outer layer and in between with several intermediate layers, which are impregnated with hardenable material, is produced in a conveyor line. At the end of the conveyor line, the previously flat inner calibration hose is opened to its full diameter by means of a hose unfolding device, the hose unfolding device being held back in the conveying direction of the rehabilitation hose by means of a holding band provided in the inner calibration hose. The retaining band, which is anchored at the other end at the beginning of the conveyor line, must first be passed through the entire inner calibration hose until it is threaded into the conveyor line together with it and at its free end holds the hose deployer stationary within the inner calibration hose. Since with this method the tether cannot be continuously inserted into the inner calibration hose, only inner calibration hoses with such a short length can be used that the tether can still be passed through manually and the inner calibration hose can still be gathered on the tether.

Furthermore, it is known from DE 41 09 885 AI to retain a forming tool within a longitudinally moving hollow profile by magnetic force in the longitudinal direction. For this purpose, magnets are provided on the forming tool, which interact with magnets which are arranged in a stationary manner outside the hollow profile. This results in a "floating", non-contact holding force introduction towards the hollow profile. It is therefore the object of the invention to develop a device and a method of the type mentioned at the outset in such a way that continuously conveyed film tubes of any length can also be easily expanded.

This object is achieved according to the invention in a device of the type mentioned at the outset in that a deflection provided for the film tube is provided on the route section comprising the expansion element, which deflection retains the expansion element in the film tube in the conveying direction.

The advantage achieved by the invention is that no tether extending within the film tube is required. In this way, a film tube of any length can be widened by the expansion element once inserted, which enables continuous processing or further processing of the film tube. The maximum processable tube length is then only determined by the length of the supplied film tube. For example, the retaining means can be a deflection roller provided for the film tube. In this way, the expansion element can also be safely retained in the conveying direction in a downwardly conveyed film tube. It goes without saying that the expansion element is correspondingly rigid and dimensioned accordingly, so that it cannot overcome the deflection in the conveyed film tube.

In other embodiments, a constriction, which restricts the at least one expansion element, can also be provided, through which the film tube is conveyed. The expansion element is preferably retained in the constriction either in the area of the two longitudinal edges or the two flat sides of the film tube. For example, the be formed by a nip of two rollers, between which the film tube is conveyed flattened.

If the outer circumference of the expansion element corresponds approximately to the inner circumference of the film tube, the two tube sides of the film tube which abut one another are completely separated from one another. The electrostatic forces which generally act between the two tube sides are at least reduced and the negative pressure which inevitably arises when the foil tube is opened again is reduced.

It is particularly advantageous if the expansion element is rotationally symmetrical at right angles to the conveying direction of the film tube. The expansion element can e.g. a ring, a circular disc or a ball, so that the expansion element is freely rotatable about its rotational symmetry axis within the film tube while maintaining the opening effect.

Preferably, the outer surface of the processing element interacting with the film tube is edge-free, in particular round, so as not to damage the film tube.

In a further embodiment of the invention, an anti-rotation device can be provided on the expansion element, which prevents the expansion element from rotating within the film tube. Such a rotation of the expansion element is also effectively prevented in that the length of the expansion element in the conveying direction is greater than the maximum opening width to which the film tube can be expanded to a maximum when the expansion element is inserted. One is also conceivable with regard to the conveying direction of the film tube asymmetrical weight distribution of the expansion element, so that the orientation of the expansion element is predetermined by its heavier half arranged at the bottom.

The expansion element is preferably a supply roll, from which a wound flexible longitudinal material unwinds into the film tube when it is being conveyed. This longitudinal material can e.g. a cord, an electrical cable, a smaller inner tube, a tape, etc. The length of the longitudinal material corresponds to the length of the film tube used, so that both end at the same time and can be replaced in a single step.

The expansion element can advantageously also be used to guide a longitudinal material (cord, electrical cable, smaller inner tube, etc.) that is also conveyed with the film tube, in that at least one passage guide or guide opening for the longitudinal material is provided in the expansion element.

The above-mentioned object is achieved according to the invention in the production method mentioned at the outset in that the expansion element is retained by a deflection arranged downstream in the conveying direction. The expansion element is preferably held between two deflections provided for the film tube. The film tube is preferably opened by the expansion element over its entire inner circumference in order to at least reduce the electrostatic forces acting between the two tube sides and to reduce the negative pressure which arises in the film tube when it is opened again. The film tube can be widened by an expansion element before and / or after the impregnation of its intermediate layer (s). The invention also relates to a rehabilitation hose produced by the method described above.

Further advantages of the invention result from the description and the drawing. Likewise, the features mentioned above and those listed further can be used according to the invention individually or in combination in any combination. The embodiments shown and described are not to be understood as an exhaustive list, but rather have an exemplary character for the description of the invention.

It shows :

Figure 1 is a longitudinal section through a conveyor line for producing a multi-layer curable renovation hose, the respective cross section along the conveyor line is also shown.

Figure 2 is a plan view of the film tube of the rehabilitation hose corresponding to II in Fig. 1.

FIGS. 3 to 5 longitudinal or cross-sections through further exemplary embodiments of conveyor lines for a flat film tube, each in the region of an annular expansion element;

FIGS. 6 and 7 still further exemplary embodiments of conveyor lines for a film tube, in each case in the area of an annular expansion element and in a plan view corresponding to FIG. 2; and 8 shows a further exemplary embodiment of a conveyor line for a flat film tube in the region of a fork-shaped expansion element in a view according to FIG. 3.

In Fig. 1, 1 denotes a supply roll, on which a thin film tube 2 made of liquid-tight plastic is wound flat. As the cross section A of the film tube 2 shows, the two tube sides 2a, 2b of the foil tube 2 lie completely against one another, with electrostatic attractive forces generally acting between the two tube sides 2a, 2b.

The film tube 2, which is continuously unwound from the supply roll 1 in the conveying direction 3, passes through a conveying path on which it is deflected several times via deflections 4, 5, 6, 7, 8 (shown schematically as deflection rolls). When the film tube 2 was initially threaded into the conveyor line, a first expansion element 9 became between the supply roll 1 and the first deflection 4, a second expansion element 10 between the two deflections 5, 6 and a third expansion element between the two deflections 6, 7 11 and after the deflection 8, a fourth expansion element 11 is loosely inserted.

The expansion elements 9, 11, 12 are each circular metal rings, the outer circumference (outer diameter) of which is only slightly smaller than the inner circumference of the film tube 2. These expansion elements 9, 11, 12 are placed parallel to the two tube sides 2a, 2b, ie flat, between these tube sides 2a, 2b in the film tube 2. As cross section B shows, the film tube 2 is expanded by the expansion elements 9, 11, 12 to their ring thickness. opens. The expansion element 10 is a supply roll, from which a flexible longitudinal material 13 (for example a cord or a cable) wound thereon unwinds into the film tube 2 when it is being conveyed (cross section C) and is also conveyed with the film tube 2.

While the weight of the expansion elements 9, 10 can already be sufficient to prevent them from being conveyed upward in the upwardly-conveyed film tube 2, the expansion element 12 is in the magnetic field of a magnet 14 and the expansion element 11 at the deflection 7 in the film tube 2 in the conveying direction 3 held back without contact. In the latter case, the film tube 2 is held on the conveyor line under such tension and / or deflected at such an angle that the two tube sides 2a, 2b on the deflections 4, 6, 7 do not match the strength of the respective expansion elements 9, 10 , 11 can be opened and / or that the deflection radii of the film tube 2 at these deflections are each significantly smaller than the axial length of the expansion elements 9, 10, 11.

When the film tube 2 is initially threaded in, an air supply is also added to the interior of the tube, so that when the film tube 2 is opened there is no negative pressure which would lead to the two tube sides 2a, 2b sticking again. If this air supply is used up, the film tube 2 is pierced, filled with compressed air and then the piercing point is closed again.

After the deflection 6, the film tube 2 is inserted on a supply line 15, which is held in a stationary manner, into a tube 17, which is held in a stationary manner above the base 16. A material web 19 (for example a glass fiber web) is drawn off from a supply roll 18, deflected via a deflection roller 20 and on the Tube 17 folded over to an intermediate layer 21, the two end edges of which overlap one another (cross section D). Then a liquid-tight material web 23 (for example a film web) is drawn off from a supply roll 22, deflected via a deflection roll 24 and turned over on the intermediate layer 21 to an outer layer 25, the two end edges of which also overlap one another (cross section E). These two end edges are closed to one another in a liquid-tight manner by means of a device (not shown) by means of a weld seam (cross section F).

Between the deflections 7, 8, the now multi-layer hose is conveyed downwards, vertically downwards in the exemplary embodiment shown. The annular space 27 present between the film tube 2 and the outer layer 25 is filled with hardenable resin 28 via the feed line 15 and the intermediate layer 21 is thus impregnated with resin 28. After the deflection 8, by means of which excess resin 28 is also retained in the conveying direction 3, the curable rehabilitation hose 29 with the cross section G is completed.

As shown in FIG. 2, the widening elements 11, 12 also serve to guide the longitudinal material 13. For this purpose, through openings or guide openings 30 are provided in the widening elements 11, 12 on opposite ring sections, through which the longitudinal material 13 initially starts in the conveying direction 3 was threaded through.

FIG. 3 shows another conveyor section for the film tube 2, which here is completely expanded to its round opening cross section via an annular expansion element 31. When the film tube 2 was initially threaded into the conveyor line, the expansion element 31 was loosely inserted into the film tube 2 via the open tube end and then upright between two Deflection rollers 32, 33 placed with so much play on the floor 16 that the film tube 2 can run between the deflection rollers 32, 33 and the expansion element 31. The expansion element 31 is held in the film tube 2 without contact. The film tube 2 is thus opened to the outer diameter of the annular expansion element 31. The weight of the expansion element 31 is chosen so heavy that the expansion element 31 cannot be lifted out of its position between the deflection rollers 32, 33 by the film tube 2.

In the conveyor section shown in FIG. 4, the annular expansion element 31 is retained at the nip of two rollers 34, between which the film tube 2 is conveyed flat. Since the gap width is smaller than the ring thickness of the expansion element 31, the expansion element 31 cannot overcome this constriction.

FIG. 5 shows a further conveying section in which the film tube 2 is conveyed into the plane of the drawing perpendicularly to it and between two lateral stops 35. Since their spacing is smaller than the diameter of the expansion element 31, the expansion element 31 is retained at the two stops 35 in the region of the two longitudinal edges 2c of the film tube 2 in the conveying direction 3.

The two stops 35 are preferably rotationally symmetrical and rotatable about their axis of symmetry oriented perpendicular to the conveying plane of the flattened film tube 2. By conveying the film tube 2 between the stops 34 and the expansion element 31, the stops 35 are set in rotation. Rotation bodies are preferably used as the stop 35, the outer contour of which tapers on both sides towards the axial center. This has the advantage that the ring-shaped opening Adjust the expansion element 31 and thus also the film tube 2 automatically to the axial center of the stops 35. In the exemplary embodiment shown, the stops 35 are designed as single-shell hyperboloids or as cones.

6 and 7 show conveyor sections in which the expansion element is prevented from rotating within the film tube about an axis perpendicular to the plane of the drawing. In particular, if the expansion elements serve to guide the longitudinal material 13 that is also conveyed, a rotation of the expansion element would inevitably lead to a malfunction in the production process.

In the exemplary embodiment according to FIG. 6, the circular expansion element 11, 12 is extended in the conveying direction 3 by two extensions 36, which protrude from the expansion element tangentially to its outer circumference and parallel to one another. These two extensions 36 can be integral with the expansion element or separate parts, such as e.g. Bars connected to the expansion element.

The annular expansion element 37 shown in FIG. 7 with its guide openings 38 is prevented from rotating within the film tube 2 by its cross section. This is because the length of the expansion element 37 in the conveying direction 3 is greater than the maximum opening width to which the film tube 2 can be expanded to a maximum when the expansion element 37 is inserted. As a result, the expansion element 37 in the film tube 2 cannot be rotated by more than 90 °.

8 shows a further conveying section in which the film tube 2 is expanded by means of two expansion elements 39 and 40 arranged one behind the other in the film tube 2 in the direction of conveyance 3. The rear in the 3 direction ß 4J ö 1 1 in ß • Φ ö φ CQ rl H o φ rö ß Di φ 4-1 Di sO Q CM rl ^■ * ^• τS ß M φ -rl o ε rH CM Ö 4H H Xl S ß o ß - H 3 e Φ rö = rö Dl -HX! φ ß ß Φ

Φ ß Φ - ß rl H -q Xl ^ ti Φ U CQ Φ -H xl o N Φ CM rH JJ • H = 0 Φ Φ u -H 5 PN CQ u ω r-1 4- ⁾ ! ω 4-1 φ ra Di 2 ω rt Φ rö φ r- φ Q rö H Xl -rl Sπ rH T3 Di ^ 4 rö rö -f) <- 4J rö CM H rd υ Φ Φ Φ _^ o _^ ö υ rH - CQ JΠ 4H is <# Qt U Xl ß 4J <Tι X! XI? ^• • s X! rö j <V = ör w α. Φ rö -H ro = P rö 4- ⁾ u X! τs ro CQ rl ß ß 4J

Φ 01 JH Φ Di rH ^• HP CQ ü ^' ß M Φ Φ ß

N Λ! xl CQ 4 -H Φ N n -H 4-1 Ü φ τf N Φ r- \ υ Ό X! jJ CQ Φ & CQ Di Φ -rl ß ^ - \ rö --P ^" w 4-> ß υ rö CQ 4-1 ro -H φ N rH φ ß rö Φ

5 in ß iH Φ -H ^< Ü Φ 3 rH -H rH 0 rH Φ is 4

HP Φ rö ß ß 4: D ⁾ 0 Φ rH rö. EH rH xl 4H

Φ N -H & - ■ -) CJ fe Ό • s Φ υ ß = rö

& rH co rH Φ CQ rö Φ 4- ⁾ Φ ß P CQ φ

& M 0 Φ r-1 -H K 4J ε Ö rH i Ö Φ 4J -H J «

0 EH Φ CQ cH Φ -α -H 0 φ ü φ -Ö! & n • rl DI Φ CTi ö 5 υ> ^ φ -Ö ß N τ3 ß ß rl! ß 4-> ro -H -H 4- ⁾ u rl -H 4H P ß φ

Φ Φ φ CQ Φ 0! CQ _^ -H 4 Φ P ^" a Di ß tl ß NT) rö 4-> Dl 4->> SH -H 4J & CQ X) rö ß

-rl H P -H ß ß Φ φ X! rl ß P σi φ

1 Φ rö i Φ H φ φ CQ Ό • Ö rö Φ ß φ Φ rl ro ^ 4

! π • & B XI ro Tl T3 φ -H T3 Xl

CM Xl -H JJ 4-1 φ Φ = ^■ 0 = 0 Ö in ro rl T3 J ß = P CQ -H rH υ & rl ß CQ iH En Φ 0 = 0 φ rl 4-1 & φ φ Φ Φ o CQ ri Φ Dl EH ß CΛ M φ ß

1 -H CM} -H CQ <rö Ö -> Dl Ö rö rö X! Φ CM

T3 Φ ^ ß Ti Di 3 -H 0 ß. P Ö T3 -rl ß ε

= 0 Φ ß 4- ⁾ ro 4- ⁾ φ H & Φ Φ Xl

4 N ß 4H 0 ß Ö 0 oo M X! 4-> ro O -H rH ü

CQ Φ Φ φ ro 4-> Φ CQ - Ü o U Di Q ^• ψ ß Φ ß

-H 4 N Di 4 -H ε Φ H -H • rl 4 ro -H CQ rö r- H x! ß 4J Φ Φ rH rH SH Φ ß -. J Dl rH σ> rö rö υ ^• iH ß & .H Ö -H ε Φ SH N φ ß ß ß Xl ro ft is Xl φ 4-J Φ φ Φ rH Φ Φ ε rö Φ Φ ß U

CQ ß 6 CQ τ3 CQ H • Ö Di φ N -rl 4-1 CQ

4-> ß ß τs CQ φ Dl α Φ -H 0 SH rH 4- ⁾ rH TS -rl ß ß Φ φ ß Φ H fi P 4 Φ! H = 0 - f Φ M rö φ Φ

Φ N ^< Ü -H) Φ ß P ^" XI r- & CQ tu CQ ß s Xl & -rl ε rH xl CQ Φ 4J rö N 4. Dl ß u 4H H

Φ rö ß Φ Di -iH Φ K rö Ö Di ß α <) ß 0 r-i Φ 4J 4-> ß Φ Φ> Ö -H -H 3 Φ ß f ^ EH

Φ xl M -rl 4-1 & CQ Φ t, 4 ε) P

CQ ε υ u Φ 4-> Ö 4-1 n rö Xϊ 0 ro -H Φ Φ ß

Dl rö CQ = P SH -H -H 3 • ^ Ό υ> H Ü Φ ß X! • iH Φ. ß -H SH PQ Φ Λ Q -H £ -HU T3 Φ! 4-1 φ & T3 S _^ ~. ! -H φ rH 4H Φ -H ß 4J rl

4-> -H l φ φ 4-1

90 ε Φ Φ ü 5 -H rö P ^" φ -H ß 4H Φ

^• <H τ3 & ι -rl 3 Di tg T3 -H φ <ß rl CQ -rl ß -rl

Φ • Xl> Ö <: -Ö Φ fi P SH ^■ 0 -H φ l rö N

& -. τ3 u

O Ό rö ts • xl Φ Φ PQ Xl ß

4-1. -. rö CQ m 4-1 4J 4-> υ 4- ⁾ -rl Di r) U CQ Φ f

O P H -H rH r-t rö -H o CQ σ CQ 0 rö Φ -H P ε 0 Φ -H Φ

<# & 4-1 rö TS S> 1 ^ -H Ö ε m ε ß -H xl ts ^■ 0 rl

Claims

claims

Device for producing a curable multi-layer rehabilitation hose (29) on a conveyor section, with a section on which a liquid-tight film hose (2) is supplied as the inner layer of the renovation hose (29), and with subsequent section sections on which the film hose (2 ) further tube layers (21, 25) are turned over and at least one intermediate layer (21) is impregnated with hardenable material (28), with an expansion element (9, 10, 11, 12; 31; 37) located in the film tube (2) over a stretch of the route ; 39) is held back without contact in the conveying direction (3) by a restraining means, characterized in that on the stretch section (9, 10, 11, 12; 31; 37; 39) comprising a widening element (1.) For the film tube (2 ) provided deflection (4, 6, 7; 32, 33; 42) is provided, which conveys the expansion element (9, 10, 11, 12; 31; 37; 39) in the film tube (2) erection (3) holds back.

2. Device according to claim 1, characterized by a constriction which restricts the at least one expansion element (31; 39) and through which the film tube (2) is conveyed.

3. Apparatus according to claim 2, characterized in that the at least one expansion element (31) is retained in the constriction in the region of the two flat sides (2a) or the two longitudinal edges (2b) of the film tube (2).

Apparatus according to claim 2 or 3, characterized in that the constriction is formed by a nip of two rollers (17; 42), between which the film tube (2) is conveyed flattened.

Device according to one of the preceding claims, characterized in that an expansion element (40) arranged in the film tube (2) in the conveying direction (3) in front of the retained expansion element (39) is connected to the retained expansion element (39).

Device according to one of the preceding claims, characterized in that the outer circumference of the expansion element (9, 10, 11, 12; 31; 37; 39) corresponds approximately to the inner circumference of the film tube (2).

Device according to one of the preceding claims, characterized in that the expansion element (9, 10, 11, 12) is rotationally symmetrical at right angles to the conveying direction (3) of the film tube (2).

Device according to one of the preceding claims, characterized in that the outer surface of the expansion element (9, 10, 11, 12; 31; 37; 39) cooperating with the film tube (2) is edge-free, in particular round.

Device according to one of the preceding claims, characterized in that an anti-rotation device is provided on the expansion element (11, 12), which prevents the expansion element (10, 11) from rotating within the film tube (2).

10. Device according to one of the preceding claims, characterized in that the length of the expansion element (37) in the conveying direction (3) is greater than the maximum opening width to which the film tube

(2) can be expanded as far as possible when an expansion element (37) is inserted.

11. Device according to one of the preceding claims, characterized in that the expansion element

(10) is a supply roll, from which a wound flexible longitudinal material (13) unwinds into the film tube (2) when it is being conveyed.

12. Device according to one of the preceding claims, characterized in that the expansion element

(11, 12; 37) has at least one guide opening (30; 38) for a longitudinal material (13) which is also coiled with the film tube (2).

13. A method for producing a curable multi-layer rehabilitation hose (29), around its inner liquid-tight inner layer formed as a film hose (2) on an axial conveying path

(21, 25) are transhipped, at least one intermediate layer (25) of the rehabilitation hose (29) being impregnated with hardenable material (28), with at least one expansion element being initially threaded into the conveyor line (2)

(9, 10, 11, 12; 31; 37; 39) is inserted through the open tube end into the film tube (2) and is held back on a conveyor section in the conveying direction (3) without contact, characterized in that that the expansion element (9, 10, 11; 31; 37; 39) by a deflection (4, 6, 7; 32, 33; 42) arranged downstream in the conveying direction (3), preferably between two deflections provided for the film tube (2) (5, 6; 6, 7; 32, 33; 42).

14. The method according to claim 13, characterized in that the film tube (2) is conveyed through a constriction at which the at least one expansion element (31; 39) is retained.

15. The method according to claim 14, characterized in that the at least one expansion element (31) is retained in the constriction in the region of the two flat sides (2a) or the two longitudinal edges (2b) of the film tube (2).

16. The method according to claim 14 or 15, characterized in that the at least one expansion element (31; 39) is retained at the nip of two rollers (34; 42), between which the film tube (2) is conveyed flattened.

17. The method according to any one of claims 13 to 16, characterized in that the film tube (2) through the expansion element (9, 10, 11, 12; 31; 37; 39) is opened on its entire inner circumference.

18. The method according to any one of claims 13 to 17, characterized in that the expansion element (10) is a supply roll, from which a wound flexible longitudinal material (13) in the film tube (2) unwinds when it is conveyed.

19. The method according to any one of claims 13 to 18, characterized in that the film tube (2) before and / or after the impregnation of its at least one intermediate layer (21) each by an expansion element (9, 10, 11, 12; 31; 37 ; 39) is expanded.

20. rehabilitation hose (29), produced by the method according to one of claims 13 to 19.