DE10002960C2 - Device and method for producing a multi-layer curable rehabilitation hose - Google Patents

Description

The invention relates to a device for producing a curable multi-layer renovation hose on a För the route, with a section on which a river Liquid-tight film tube as the inner layer of the renovation hose is supplied, and with subsequent routes cut on which around the film tube more tube were handled and at least one intermediate layer is impregnated with curable material, on a Section of a line in the film tube tion element in the conveying direction by a retaining means is held without contact, as well as a method for manufacturing provide a curable multi-layer renovation hose, is, when initially threading the film tube through at least one expansion element in the conveyor line the open tube end is inserted in the foil tube and touch on a conveyor section in the conveying direction is held back without hesitation.  

Such a device and a corresponding manufacturer lungsverfahren are for example by DE 44 27 633 A1 known.

Damaged pipes that cannot be walked on can be so-called called relining procedures, in which one out curable molding compounds existing renovation hose in a defective pipeline pulled in and there to one New tube is cured.

In the manufacture known from DE 44 27 633 A1 A multi-layer Sanie will drive in a conveyor line hose with a film tube (as an inner potash brierschlauch)) as the inner layer, with an outer layer and made in between with several intermediate layers, wel be impregnated with hardenable material. At the end The inner potash, which was flat until then, becomes the conveyor line brier hose to its full diameter using a Tube unfolders open, the tube unfolders via a holding strap provided in the inner calibration hose retained in the conveying direction of the rehabilitation hose becomes. The tether, the other end of the conveyor route is anchored, must first through the entire interior through the calibration hose until it is together men with this is threaded into the conveyor line and on the free end of the tube unfolding station inside of the inner calibration hose. Because with this procedure the tether is not continuously in the internal calibration only inner potash can be inserted brierschläuche be used with such a short length that the tether still passed manually and the inner Calibration hose still gathered on the tether can be.  

Furthermore, it is known from DE 41 09 885 A1, an order molding tool within a longitudinally moving hollow profile Retain magnetic force in the longitudinal direction. For this are on Forming tool magnets provided with outside of the Hollow profile interact fixed magnets. This results in a "floating" con to the hollow profile tactless holding force application.

It is therefore the object of the invention, a device and a method of the type mentioned in the beginning ter educate that continuously conveyed films hoses of any length can be easily expanded NEN.

This task is ge in a device of the beginning named type according to the invention solved in that on the Widening element comprehensive route section as a return holding means a deflection provided for the film tube Kung is provided, which is the expansion element in the foil holds the hose in the conveying direction.

The advantage achieved by the invention is that no tether running inside the film tube is required. So a film tube of any length ge by the expansion element once inserted be tet, whereby a continuous loading or further processing working of the film tube is possible. The maximum ver Workable hose length is then only by the length of the supplied film tube. For example can the restraint one pre for the film tube be seen pulley. So the expansion element also in a downward conveyed film tube in conveying hold back safely. It is understood that the expansion element  accordingly rigid and correspondingly dimensioned is so that it is not redirected in the funded Can overcome film tube.

In other embodiments, at least one can a constriction restraining expansion element is provided through which the film tube is conveyed. Prefers is the expansion element in the constriction either in the loading rich of the two longitudinal edges or the two flat sides of the Foil tube retained. For example, the Eng be formed by a nip between two rollers, between which the film tube is flattened is promoted.

If the outer circumference of the expansion element is approximately the inside corresponds to the circumference of the film tube, the two are on mutually adjacent tube sides of the film tube completely separated from each other. The between the two hose sides generally acting electro static forces are at least reduced and the repeated opening in the film tube inevitably arise de reduced vacuum.

It is particularly advantageous if the expansion element perpendicular to the conveying direction of the film tube rotati is asymmetrical. The expansion element can, for. B. a Ring, a round disc or a ball, so that the on Expansion element with the same opening effect inside half of the film tube around its rotational symmetry axis is freely rotatable.  

Preferably, the one that interacts with the film tube Outer surface of the expansion element without edges, esp special round so as not to be the film tube damage.

In a further embodiment of the invention, on Expansion element an anti-rotation device may be provided, wel che the expansion element at a rotation within the Foil tube prevents. Such a rotation of the display tion element is effectively prevented by the fact that the length of the expansion element in the conveying direction is greater is the maximum opening width to which the foils tube with maximum expansion element inserted is cash. One is also conceivable with regard to the direction of conveyance of the film tube asymmetrical weight distribution of the Expansion element, so that the orientation of Aufwei tion element by its heavier half arranged below is specified.

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

The expansion element can also advantageously be used for guiding longitudinal material conveyed with the film tube (Cord, electrical cable, smaller inner tube, etc.) be used by at least one in the expansion element  Passage guide or guide opening for the longitudinal material is provided.

The above-mentioned task is performed with the above Manufacturing method according to the invention solved in that the expansion element by a nachge in the conveying direction orderly diversion is withheld. Preferably that is Expansion element between two for the film tube in front seen deflections held. The film tube will be preferred by the expansion element on its entire inside open the circumference between the two hose cables at least to reduce the electrostatic forces and around when opening again in the film tube to reduce the resulting negative pressure. The film tube can before and / or after impregnating its intermediate layer ge (n) each expanded by an expansion element the.

The invention also relates to one described above Renovation hose manufactured using a process.

Further advantages of the invention result from the Be writing and drawing. Likewise, the above mentioned and the features listed further according to the invention  each individually or in groups can be used in any combination. The ge Embodiments shown and described are not to understand as a final list, but have rather 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 route is also shown.

Figure 2 is a plan view of the film tube of the sanitation hose corresponding to 11 in Fig. 1.

Fig. 3 to 5 longitudinal or cross-sections through further exemplary embodiments from conveyor lines for a flat Fo lienschlauch each in the region of an annular expansion element; and

FIGS. 4 and 7 further embodiments of För routes for a tubular film, each in the range ei nes annular bulking member and in a plan view corresponding to FIG. 2.

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 hose cables 2 a, 2 b of the film tube 2 lie completely against one another, with electrostatic attractive forces generally acting between the two tube sides 2 a, 2 b.

The film tube 2 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). Upon initial threading of the film tube 2 in the conveying path has been Zvi over the open end of the hose, the supply roll 1 and the first deflection 4's an ER Stes expansion element 9 between the two Umlen fluctuations 5, 6, a second expansion member 10, between the two bends 6, 7 a third expansion element 11 and after the deflection 8 a fourth expansion element 11 each loosely inserted.

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

While in the expansion elements 9 , 10 their weight can already be sufficient to prevent them from being promoted in the upwardly-promoted film tube 2 , the expansion element 12 in the magnetic field of a magnet 14 and the expansion element 11 at the steering 7 in the film tube 2 in Conveying direction 3 held back without contact. In the latter case, the film tube 2 is held on the conveyor line under such a voltage and / or deflected at such an angle that the two hose sides 2 a, 2 b at the deflections 4 , 6 , 7 not on 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 in each case significantly smaller than the axial length of the expansion elements 9 , 10 , 11 .

During the initial threading of the film tube 2 , an air supply is also added to the interior of the tube, so that when the film tube 2 is opened inside the tube there is no negative pressure which would lead to the two sides of the tube 2 a, 2 b 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 at a stationary supply line 15 into a pipe 17 which is held above the floor 16 . Before a supply roll 18 a web of material 19 (z. B. a Glasfa serbahn) is drawn off, deflected via a guide roller 20 and turned on the tube 17 to an intermediate layer 21 , the two end edges of which overlap each other (cross section D). Then, from a supply roll 22, a liquid keitsdichte web of material 23 (for example, a film web z.) Abgezo gene deflected over a deflecting roller 24 and rule management on the interim is turned over 21 to an outer layer 25 whose both end edges also overlap each other (cross section E) , These two end edges by means not shown by a weld 26 liquid-tightly closed with each other (cross-section F).

Between the deflections 7 , 8 the now multi-layer hose is conveyed downwards, for example vertically downwards in the embodiment shown. The annular space 27 present between the film tube 2 and the outer layer 25 is filled with curable 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 expansion 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 in each case on mutually opposite ring sections, through which the longitudinal material 13 in the conveying direction 3 was initially threaded.

In Fig. 3, another conveyor line for the film tube 2 is shown, which is expanded here on an annular expansion element 31 completely on its round opening cross-section. During the initial threading of the film tube 2 into the conveyor line, the expansion element 31 was introduced loosely into the film tube 2 via the open tube end and then placed upright between two deflection rollers 32 , 33 with so much play on the floor 16 that the film tube 2 between the Deflection rollers 32 , 33 and the expansion element 31 can run ent. 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 can not be hochgeho ben by the film tube 2 from its position between the guide rollers 32 , 33 .

In the embodiment shown in Fig. 4, the conveying path ring-shaped expansion member 31 is retained at the nip of two rollers 34, between which the foil hose is conveyed flattened. 2 As the gap width is less than the thickness of the ring Aufweitungsele ments 31, the bulking member 31 can not imagine this Eng overcome.

Fig. 5 shows a further conveyor line, in which the film tube 2 is conveyed perpendicular to the plane of the drawing into this and between two lateral stops 35 . Since the distance between them than the diameter of the bulking member 31 is smaller, the bulking member 31 to the two stops 35 in the region of the two longitudinal edges 2 of the film tube 2 c retained in the conveying direction. 3

The two stops 35 are preferably rotationally symmetrical and rotatably mounted about their axis of symmetry oriented perpendicular to the conveying plane of the flattened film tube 2 . By promoting the film tube 2 between the stops 34 and the expansion element 31 , the stops 35 are set in rotation. Such a body of rotation is preferably used as the stop 35 , the outer contour of which tapers towards the axial center on both sides. This has the advantage that the annular expansion element 31 and thus also the film tube 2 automatically adjust 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.

In Figs. 6 and Fig. 7 conveying sections are shown, in which the expansion element of the film tube is prevented to an orthogonal to the plane of each axis from rotating in nerhalb. 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 are tan gential to the outer circumference and parallel to one another from the expansion element. These two extensions 36 can be in one piece with the expansion element or separate parts, such as. B. rods that are 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 maximally expanded 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 °.

Claims (19)

1. Device for producing a curable multi-layer rehabilitation hose ( 29 ) on a Förderstrec ke, with a section of the route, on which a liquid-tight film tube ( 2 ) is supplied as the inner layer of the sanitation hose ( 29 ), and with after the following sections, on which around the Foli enschlauch (2) further hose layers (21, 25) will strike vice and is impregnated at least one intermediate layer (21) with curable material (28), wherein, on a section of an in-film tube (2) expanding element (9, 10 11 , 12 ; 31 ; 37 ) in the conveying direction ( 3 ) is held back without contact by a retaining means, characterized in that on the stretch section comprising the expansion element ( 9 , 10 , 11 , 12 ; 31 ; 37 ) as retaining means a for the film tube ( 2 ) provided deflection ( 4 , 6 , 7 ; 32 , 33 ) is provided, which the expansion element ( 9 , 10 , 11 , 12 ; 31 ; 37 ) in the film tube ( 2 ) in the conveying direction ( 3 ). 2. Device according to claim 1, characterized by a at least one expansion element ( 31 ) restraining throat, through which the film tube ( 2 ) is promoted ge. 3. Apparatus according to claim 2, characterized in that the at least one expansion element ( 31 ) is retained in the constriction in the area of the two flat sides ( 2 a) or the two longitudinal edges ( 2 b) of the film tube ( 2 ). 4. Apparatus according to claim 2 or 3, characterized in that the constriction is formed by a nip of two rollers ( 17 ), between which the film tube ( 2 ) is conveyed flattened. 5. Device according to one of the preceding claims, characterized in that the outer circumference of the expansion element ( 9 , 10 , 11 , 12 ; 31 ; 37 ) corresponds approximately to the inner circumference of the film tube ( 2 ). 6. 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 ). 7. Device according to one of the preceding claims, characterized in that the outer surface of the expansion elements ( 9 , 10 , 11 , 12 ; 31 ; 37 ) cooperating with the film tube ( 2 ) is edge-free, in particular round. 8. 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 ). 9. Device according to one of the preceding claims, characterized in that the length of the dilator element is greater in the conveying direction (3) (37) than the maximum opening width, on which the film tube (2) is maximum expandable in engaged expanding element (37). 10. Device according to one of the preceding claims, characterized in that the widening element ( 10 ) is a supply roll, from which a wicked flexible longitudinal material ( 13 ) in the film tube ( 2 ) unwinds when it is conveyed. 11. 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 conveyed with the film tube ( 2 ). 12. A method of producing a curable multi-layer renovation hose ( 29 ), around whose inner tube layer ( 2 ) designed as a film-tight liquid-tight inner layer on an axial conveying path, further hose layers ( 21 , 25 ) are handled, at least one intermediate layer ( 25 ) of the renovation hose ( 29 ) is impregnated with curable material ( 28 ), with at least one expansion element ( 9 , 10 , 11 , 12 ; 31 ; 37 ) being inserted into the film tube ( 2 ) through the open tube end during the initial threading of the film tube ( 2 ) into the conveyor line on a conveyor section in the conveying direction ( 3 ) is held without contact, characterized in that the expansion element ( 9 , 10 , 11 ; 31 ; 37 ) by a deflection ( 4 , 6 , 7 ; 32 , 33 ) arranged downstream in the conveying direction ( 3 ) ), preferably between two deflections ( 5 , 6 ; 6 , 7 ; 32 , 33 ) provided for the foil hose ( 2 ). 13. The method according to claim 12, characterized in that the film tube ( 2 ) is conveyed through a constriction at which the at least one expansion element ( 31 ) is retained. 14. The method according to claim 13, characterized in that the at least one expansion element ( 31 ) in the constriction in the region of the two flat sides ( 2 a) or the two longitudinal edges ( 2 b) of the film tube ( 2 ) is retained. 15. The method according to claim 13 or 14, characterized in that the at least one expansion element ( 31 ) at the nip of two rollers ( 34 ) is retained, between which the film tube ( 2 ) is conveyed flat pressed. 16. The method according to any one of claims 12 to 15, characterized in that the film tube ( 2 ) through the expansion element ( 9 , 10 , 11 , 12 ; 31 ; 37 ) is opened on its entire inner circumference. 17. The method according to any one of claims 12 to 16, characterized in that the expansion element ( 10 ) is a supply roll, from which a wound fle xible longitudinal material ( 13 ) in the film tube ( 2 ) unwinds when it is conveyed. 18. The method according to any one of claims 12 to 17, 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 ) is expanded. 19. rehabilitation hose ( 29 ), produced according to the method according to one of claims 12 to 18.