Device for manufacturing a lining hose for lining pipelines

Abstract

Device for producing a lining tube (2) for lining pipelines, comprising a fully enclosed inner foil tube (4) and at least one fiber tape (12) impregnated with a curable reaction resin wound onto the inner foil tube (4), with a winding mandrel (6) on which a guide device (18) is arranged, over which the inner foil tube (4) is moved by a take-off device (16), characterized in that the guide device comprises an endless circulating traction element (14) movable substantially parallel to the surface of the winding mandrel (6), which is moved over at least two free-running, non-driven guide rollers (20) received on the winding mandrel (6),and that the guide device (18) is movably mounted on the winding mandrel (6) in the radial direction and is subjected to a substantially constant spring-elastic force in the radial direction by means of spring-elastic means (28).

Description

[0001] The invention relates to a method for manufacturing a lining hose for lining pipelines and a device for carrying out the method according to the preamble of claims 1 and 4.

[0002] In the field of trenchless rehabilitation of defective sewer systems, lining tubes are increasingly used, which are referred to as "liners" and consist of a fibrous material, in particular fiberglass fabric, which is impregnated with a liquid reactive resin, which is cured after the lining tube is pulled into the pipeline and expanded with the help of compressed air by light from a radiation source.

[0003] Such a lining hose, as well as a method and a device for manufacturing such a hose, are known, for example, from DE 198 23 714 C2.

[0004] The lining tube is manufactured by winding the resin-impregnated fiber tapes in an overlapping fashion onto an inner film tube that is transparent to UV light. This inner film tube is first mounted, for example, on a cantilevered support tube, at the end of which is a winding mandrel over which the inner film tube is drawn during the winding process. The winding mandrel features a guide device with electrically driven, circulating belts that contact the inner film tube from the inside during production and guide it over the mandrel. It also includes an associated take-off device with two circulating take-off rollers that contact the wound lining tube on the outside and pull it off the winding mandrel.

[0005] The winding device described above presents the problem that the electrically driven guide mechanisms must be supplied with energy, and the necessary supply and control lines must be routed through the entire, fully enclosed inner film tube before and during production. This fundamentally precludes the production of lining tubes of any length on the winding mandrels described above.

[0006] A further problem arises in this context from the mandatory synchronization of the electrically driven guide mechanisms inside the lining tube and the electrically driven take-off mechanism on its exterior. If voltage fluctuations occur in the longitudinal direction of the inner film tube or lining tube during production, this leads to asynchronous operation of the take-off mechanism and the guide mechanisms, causing the inner film tube to be either locally compressed or stretched. Both can lead to displacements and distortions between the inner film tube and the wound layer of fiber tapes arranged on it, resulting in wrinkling of the inner film tube and significantly impairing the quality of the lining tube after curing.

[0007] In the worst case, such a fold can cause a leak in the lining liner, which – if the damage initially remains undetected – leads to the escape of compressed air and collapse of the liner during curing after the lining liner has been pulled into a pipeline to be rehabilitated and during the subsequent erection of the lining liner.

[0008] Accordingly, it is an object of the present invention to provide a method for manufacturing a wound lining hose for lining pipelines, with which it can be manufactured with reduced equipment costs and high quality.

[0009] This problem is solved according to the invention by a method having the features of claim 1.

[0010] Furthermore, it is an object of the present invention to provide a device for carrying out the method with which a lining hose wound from resin-impregnated fiber strips can be manufactured with reduced device effort.

[0011] This problem is solved according to the invention by a device having the features of claim 7.

[0012] Further features of the invention are described in the dependent claims.

[0013] According to the invention, in a method for manufacturing a lining tube for lining pipes or ducts, a fully enclosed inner foil tube is moved over a winding mandrel of a winding device. The inner foil tube, guided on the winding mandrel by a guide device, is wrapped with a fiber tape impregnated with a liquid reactive resin, which can be cured, in particular, by UV light. According to the invention, the inner foil tube is guided by at least two continuously rotating, unpowered tension members, in particular belts, mounted on the winding mandrel, which are preferably ball-bearing mounted to reduce friction. During the winding of the fiber tape, the inner foil tube wrapped with the fiber tape is conveyed over the winding mandrel exclusively by a take-up device acting on the wound fiber tape from the outside.

[0014] The driveless design of the endless circulating traction elements, which can also be designed as chains with corresponding contact surfaces against which the inner film tube rests, has the advantage that the sensitive inner film tube can be made of any length and that considerable time savings result in the production of the lining tubes, since no supply lines need to be routed through the inner film tube. Furthermore, the weight of the winding mandrel can be advantageously reduced due to the elimination of the electrical drives and mechanical gears that were previously required to drive the circulating belts, which significantly simplifies the entire design of the components for holding the support tube on which the winding mandrel is cantilevered.

[0015] According to a further concept underlying the invention, the guide device can be subjected to an additional counterforce which is directed against the pulling force exerted by the pull device on the lining hose.

[0016] This offers the advantage that the inner foil tube can be subjected to a defined pre-tension, ensuring optimal alignment of the inner foil tube with the wound fiber tape and thus preventing compression of the lining tube.

[0017] In the embodiment of the method according to the invention described above, the counterforce is preferably variable, which makes it possible to select the tensile stress exerted on the inner film tube in the longitudinal direction depending on the diameter of the lining tube as well as the material properties of the inner film tube or the wound fiber material in order to improve the production process.

[0018] Another advantage of a variable counterforce is that any tension fluctuations occurring in the longitudinal direction of the inner film tube can be compensated for, if desired, by regulating the counterforce in such a way that a substantially constant counterforce is generated, thus subjecting the inner film tube to a nearly constant tensile stress throughout the entire production process. This prevents local stretching or compression of the sensitive inner film tube and the associated weakening or wrinkling of the film material, thereby increasing the manufacturing quality.

[0019] According to a further aspect of the invention, a device according to the invention for carrying out the previously described method comprises a winding mandrel on which a guide device with at least one circulating traction element is arranged. The inner film tube is drawn over the guide device by a take-up device, which preferably comprises two take-up rollers contacting the outside of the lining tube, but alternatively may also comprise two or more circulating driven belts. The device according to the invention is characterized in that the guide device comprises an endless circulating traction element movable substantially parallel to the surface of the winding mandrel, which is moved over at least two free-running guide rollers mounted on the winding mandrel, i.e., over guide rollers that are not coupled to a drive that drives them in the feed direction of the lining tube.

[0020] This drive-free design of the guide device, or guide devices of the winding mandrel, makes it possible for the fully enclosed inner film tube to be fed to the winding mandrel, for example from a roll, in any length without prior unwinding and insertion of the control and supply lines.

[0021] The invention offers the further advantage that no additional electrical energy is required for the operation of the winding mandrel, since the circulating traction elements, which guide and tension the inner film tube during the winding process and of which at least two are arranged on opposite sides of the winding mandrel, are driven solely by the traction force exerted by the take-off device.

[0022] In the preferred embodiment of the invention, the circulating traction element is preferably an endless belt which is guided along its length on ball bearings and has a mushroom-shaped cross-section. This has the advantage that the inner foil tube, which is sensitive to mechanical stress, makes contact almost uniformly across the entire outer surface of the belt.

[0023] In the embodiment of the invention described above, the endless belt preferably has chain-link-like reinforcing elements on its underside. These are preferably made of a harder material than the rubber-like material applied to the top side. For example, the reinforcing elements can be made of engineering plastics, while the top side of the belt is made of a rubber-elastic material, in particular elastic rubber.

[0024] This has the advantage that the rolling resistance of the belt is further reduced compared to a belt that consists exclusively or almost exclusively of a rubber-elastic material.

[0025] According to a further aspect of the invention, the endless belt comprises a central web on its underside and is supported on both sides of the central web by ball bearings, which are, for example, attached to a common support body of the guide device. In this configuration, the lateral bearing surfaces of the belt preferably extend beyond the end faces of the ball bearings in a wing-like manner, so that the ball bearings are completely covered by the belt and the film material of the inner film tube cannot enter the rotating parts of the ball bearings. An inverted embodiment is also conceivable, in which the ball bearings are mounted in the center of a longitudinal groove in the belt and are bounded laterally by webs.

[0026] This has the advantage that the belt runs in a guided manner and the rolling resistance is reduced once again.

[0027] In the preferred embodiment of the invention, at least one guide roller is assigned a braking element, for example an electric or magnetic eddy current brake.

[0028] The use of an electric or magnetic eddy current braking device has the advantage that the force acting on the inner foil tube, which opposes the pull-off direction, can be specifically changed if desired, without the resulting brake abrasion, as can be observed, for example, with a mechanical friction brake, contaminating the lining tube inside.

[0029] According to a further embodiment of the invention, the guide device is associated with an adjusting device for adjusting the diameter of the winding mandrel. The adjusting device can, for example, comprise a central shaft extending longitudinally along the winding mandrel, the rotary motion of which is transmitted at several points via gears to spindle drives or racks, which act on the guide devices movably mounted on the winding mandrel.

[0030] The embodiment of the invention described above has the advantage that all guide elements can be moved simultaneously in a radial direction by rotating the central shaft. This makes it possible to increase or decrease the diameter of the winding mandrel in a substantially uniform manner in the radial direction.

[0031] According to a further concept underlying the invention, at least one of the guide devices is movably received on the winding mandrel in a plane perpendicular to the pull-off direction of the lining hose and is subjected to a substantially constant spring-elastic force in the radial direction by spring-elastic means which are supported at least indirectly on a frame-fixed part of the winding mandrel.

[0032] This has the advantage that manufacturing-related diameter variations of the inner foil tube are automatically compensated for and the risk of wrinkling due to extensive tension fluctuations in the foil material is further reduced.

[0033] The spring-elastic means can, for example, include a pneumatic spring element, in particular a bellows cylinder or a pneumatic cylinder, which is supplied with compressed air by a compressed air source that has a considerably larger volume, for example a volume 10 to 100 times larger, than the volume of the working space of the pneumatic spring element.

[0034] This makes it possible to adjust the force acting on the inner foil tube in a radial direction, for example by increasing or decreasing the air pressure in the compressed air source, and thus to apply different pre-tensions to the inner foil tube.

[0035] The invention is described below with reference to the drawings using a preferred embodiment.

[0036] The drawings show:

[0037] Fig. 1 A schematic side view of a device according to the invention with an indicated winding device during the production of a lining hose,

[0038] Fig. 2 a schematic side view of a guide device according to the invention,

[0039] Fig. 3 a schematic cross-sectional view of a ball-bearing belt with central web according to the invention,

[0040] Fig. 4 a schematic cross-sectional view of a belt according to the invention with reinforcing elements, and

[0041] Fig. 5 a schematic representation of an adjustment device according to the invention.

[0042] As shown in the depiction of Fig. As shown in 1, a device according to the invention comprises 1 for the production of a lining hose 2 A winding mandrel for lining pipelines 6, on which at least one, but preferably two or more guide devices 18 is arranged. The lining hose 2 consists of a completely enclosed inner foil tube 4 and at least one on the inner foil tube 4 by a schematically indicated winding device 8 overlapping wound fiber tape 12 , which is impregnated with a reactive resin that can be cured, in particular, by UV light. As shown in the illustration of the Fig. The winding mandrel can be removed from position 1. 6 on a floating support tube 32 attached, onto which a section of the inner foil tube to be processed 4 is wound up and stored in the collapsed state.

[0043] The command facility 18 exhibits a shape that is essentially parallel to the surface of the winding mandrel 6movable endlessly circulating traction element, which preferably as a circulating belt 14 is designed, over which the inner foil tube 4 a take-off device containing two pull rollers 16 is pulled. Although the endlessly circulating traction element can also be designed as a chain with separate chain links, each of which has a contact surface formed, e.g., with a rubber-like coating, the invention will below be described for the sake of clarity using the example of a circulating belt. 14 described.

[0044] As the depiction of the Fig. 1 and Fig. 2. The endless rotating belt continues to run. 14 over at least two on the winding mandrel 6 rotatably mounted, free-running guide rollers 20 , which are not driven and which form the reversal points where the belt 14, or more generally speaking, the endless traction element is redirected.

[0045] The process for manufacturing a lining hose 2 For the lining of pipelines, we refer below to the Fig. 1 described. In this case, the fully enclosed inner foil tube is used. 4 , which was previously placed by hand on the holder tube 32 was pushed up by the two pull rollers of the take-off device 16 over the winding mandrel 6 the winding device 8 pulled. During the advancement of the winding mandrel 6 with the help of the command and control systems 18 guided inner foil tube 4 This is achieved by a rotation of the winding device 8 with at least one fiber band 12wrapped, which is soaked with a liquid reactive resin that can be cured by electromagnetic radiation, especially by UV light, or also by heat.

[0046] The extraction device 16 This moves the inner foil tube. 4 , which after a few turns of the winding device 8 with the fiber tape 12 wrapped as a lining hose 2 into the extraction device 16 enters, in a direction that is dependent on the rotational movement of the winding device 8 adjusted speed via the winding mandrel 6 away. The routing of the inner foil tube. 4 In accordance with the invention, this is done exclusively via the endless belts that circulate without a drive. 14 the respective command facilities 18 , of which at least 2 for small diameters, and four, six or even up to eight guide devices on the winding mandrel for large diameters6 They may be provided. The one with the fiber tape 12 wrapped inner foil tube 4 According to the invention, during production, the fiber tape is exclusively exposed to external forces. 12 effective extraction device 16 over the winding mandrel 6 supported.

[0047] According to an alternative embodiment of the device according to the invention, which is not shown in detail in the drawings 1 can the extraction device 16 in addition to or as an alternative to the two in Fig. 1 shown take-off rollers 16 comprising one or more driven rollers or driven circulating belts located outside the circulation area of ​​the winding device 8 e.g. below or to the side of the winding mandrel 6 , along a non-powered traction element / belt 14 circumferentially and against the surface of the lining hose 2are available in this area. The circulating traction elements / belts 14 are attached to the winding mandrel in this manner 6 positioned and have such a length that they are at least partially within the area of ​​the winding device 8 , i.e. in the area around the inner foil tube 4 moving fiber tape 12 , and partially circulate outside of it. The drive of the additional external components to the guide devices. 18 The operation of adjustable take-off rollers or circulating belts is preferably carried out using electric motors.

[0048] Fig. Figure 2 further shows a schematic side view of a guide device according to the invention. 18 , where the endless belt 14 via two deflection pulleys arranged at the ends 20 is guided, between which a multitude of ball bearings 26 are arranged along a row on which the endlessly rotating belt14 supports itself when its outer surface touches the inner surface of the inner foil tube. 4 contacted. The inclusion of at least one management unit 18 on the winding mandrel 6 This can be achieved using spring-elastic means. 28 This can be done, for example, as a spring-damper combination with a spring element. 30 and a damping element 31 are designed and carry the respective guidance device.

[0049] The command facilities 18 can also be achieved via guides not shown, for example linear guides with end stops, on the winding mandrel 6 are kept movable, whereby the position of a guide device spring-loaded on the winding mandrel 18 preferably set so that during the production process it is deflected preferably only up to half of the maximum range of motion.

[0050] In Fig. Figure 3 is a schematic cross-sectional representation of a preferred embodiment of the ball-bearing belt according to the invention. 14 shown, which has a central bridge 24 possesses. Each on either side of the central strut. 24 is a ball bearing 26 arranged on which the belt 14 is mounted longitudinally. The ball bearings 26 are preferably recorded on a common, unseen wave, as is the case, for example, in Fig. 5 through the bolt 34 as indicated.

[0051] Fig. Figure 4 further shows a schematic cross-sectional view of a [body part] with reinforcing elements on the underside. 22 provided belt according to the invention 14 The top of the strap 14 In this embodiment, it consists of an elastic, preferably rubber-like material, whereas on the underside of the belt 14 chain-link-like reinforcing elements22 are arranged and consist, for example, of a hard plastic material such as polyamide or polycarbonate, or even of metal. The reinforcing elements 22 They serve to reduce the rolling resistance of the belt. 14 to lower it further.

[0052] Fig. Figure 5 shows a schematic representation, not to scale, of an adjustment device according to the invention. 40 The adjustment device 40 has four guidance systems 18 , each attached to a rack 36 are attached and guided via linear bearings (not shown) in such a way that they rotate a central shaft 38 They can be moved radially. This is achieved by rotating the central shaft. 38 the four outer sides of the straps 14 defined diameters of the inner foil tube placed over it 4 changed. Reference symbol list 1 Device according to the invention 2 Lining hose 4 inner foil tubes 6 winding mandrel 8 Winding device 12 fiber tape 14 Circulating traction element / belt 16 Extraction device 18 Guide system 20 Leadership role 22 chain-link-like reinforcing elements 24 Center bridge 26 ball bearings 28 Spring-elastic medium 30 spring element 31 Damping element 32 Holder tube 34 bolts 36 round rack 38 Central Wave 40 Adjustment device QUOTES INCLUDED IN THE DESCRIPTION

[0053] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0054] DE 19823714 C2

[0003]

Claims

[1] Method for manufacturing a lining tube ( 2 ) for lining pipelines, with the following process steps: – Moving a completely enclosed inner foil tube ( 4 ) via a winding mandrel ( 6 ) a winding device ( 8 ), – Wrapping the part on the winding mandrel ( 6 ) by means of a guidance device ( 18 ) guided inner foil tube ( 4 ) with a fiber tape impregnated with curable reactive resin ( 12 ), characterized by that the guidance of the inner foil tube ( 4 ) via unpowered, continuously circulating traction elements ( 14 ) is done, and that the one with the fiber tape ( 12 ) wrapped inner foil tube ( 4 ) from the winding mandrel ( 6 ) exclusively by an external application to the fiber tape ( 12 ) effective extraction device ( 16 ) is moved. [2] Method according to claim 1, characterized by that the guide element ( 10 ) is subjected to a counterforce which is exerted by the extraction device ( 16 ) on the lining hose ( 2 ) is directed against the exerted pulling force. [3] Method according to claim 2, characterized by that the counterforce is variable, in particular adjustable. [4] Method according to any one of claims 1 to 3, characterized by that the extraction device ( 16 ) comprises at least one driven roller or at least one driven circulating belt located outside the area of ​​rotation in which the fiber belt ( 12 ) through the winding device ( 8 ) is guided around the inner foil tube, in the area of ​​an endlessly circulating traction element ( 14 ) to generate a pulling force against the outside of the lining hose ( 2 ) is employable. [5] Device for manufacturing a lining hose ( 2 ) for lining pipelines, which has a fully enclosed inner foil tube ( 4 ) and at least one on the inner foil tube ( 4 ) wound-up fiber tape impregnated with a curable reactive resin ( 12 ) includes, with a winding mandrel ( 6 ), on which a control facility ( 18 ) is arranged, over which the inner foil tube ( 4 ) by a withdrawal device ( 16 ) is moved, characterized by that the guide device is essentially parallel to the surface of the winding mandrel ( 6 ) movable endless circulating traction element ( 14 ) includes, which has at least two connections to the winding mandrel ( 6 ) recorded free-running, non-driven guide rollers ( 20 ) is moved. [6] Device according to claim 5, characterized bythat the traction element is a chain or a belt with a mushroom-shaped cross-section ( 14 ) is. [7] Device according to claim 6, characterized by that the belt ( 14 ) preferably chain-link-like reinforcing elements on the underside ( 22 ) exhibits. [8] Device according to claim 6 or 7, characterized by that the belt ( 14 ) a central rib on the underside ( 24 ) includes and is ball-bearing mounted on both sides of the central web ( 26 ) is. [9] Device according to any one of claims 5 to 8, characterized by that at least one leadership role ( 20 ) a braking element, preferably an electric eddy current brake, is assigned. [10] Device according to any one of claims 5 to 9, characterized by that the guide device has an adjustment device ( 40 ) for adjusting the diameter of the winding mandrel ( 6 ) is assigned. [11] Device according to any one of claims 5 to 10, characterized by that the extraction device ( 16 ) comprises at least one driven roller or at least one driven circulating belt located outside the circulation area of ​​the winding device ( 8 ), preferably below or to the side of the winding mandrel ( 6 ), in the area of ​​an endlessly rotating traction element ( 14 ) runs around and against the outside of the lining tube ( 2 ) is employable. [12] Device according to any one of claims 5 to 11, characterized by that the command facility ( 18 ) movable in a radial direction on the winding mandrel ( 6 ) is absorbed and by spring-elastic means ( 28 ) is subjected to an essentially constant spring-elastic force in the radial direction. [13] Device according to claim 12, characterized by that the spring-elastic means ( 28 ) a pneumatic spring element (30 ) include being connectable to a compressed air source.

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