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DE-102015014729-B4 - Winding mandrel in a winding device for the production of a lining hose for lining channels and pipelines

DE102015014729B4DE 102015014729 B4DE102015014729 B4DE 102015014729B4DE-102015014729-B4

Abstract

A winding mandrel (1) in a winding device for producing a lining tube (2) for lining channels and pipelines, which has an inner foil tube (4) and a layer of at least one overlapping wound fiber tape (6) impregnated with a liquid reaction resin arranged thereon, with a base body (8) on which at least two guide devices (10, 12) are received, each comprising an endlessly circulating belt (14, 16) over which the inner foil tube (4) is moved in a feed direction (A), characterized in that the first guide device (10) is fixedly coupled to the base body (8), and that the circulating belt (16) of the second guide device (12) is movable in a plane perpendicular to the feed direction (A) and is pushed away from the top of the base body (8) by pressure means (18; 118) with a constant force.

Inventors

  • Peter Duttenhöfer
  • Timo Singler

Assignees

  • BRANDENBURGER LINER GMBH & CO. KG

Dates

Publication Date
20260513
Application Date
20151117

Claims (12)

  1. A winding mandrel (1) in a winding device for producing a lining tube (2) for lining channels and pipelines, which has an inner foil tube (4) and a layer of at least one overlapping wound fiber tape (6) impregnated with a liquid reaction resin arranged thereon, with a base body (8) on which at least two guide devices (10, 12) are received, each comprising an endlessly circulating belt (14, 16) over which the inner foil tube (4) is moved in a feed direction (A), characterized in that the first guide device (10) is fixedly coupled to the base body (8), and that the circulating belt (16) of the second guide device (12) is movable in a plane perpendicular to the feed direction (A) and is pushed away from the top of the base body (8) by pressure means (18; 118) with a constant force.
  2. winding mandrel Claim 1 , characterized in that the endlessly rotating belt (16) of the second guide device (12) is guided over a first and a second deflection roller (16a, 16b) which are mounted on a common support body (20) on which the pressure means (18; 118) act.
  3. winding mandrel Claim 2 , characterized in that the common support body (20) is guided in a guide (22), in particular a linear guide (22), so as to be movable in a radial direction relative to the base body (8).
  4. winding mandrel Claim 2 or 3 , characterized in that the support body (20) is supported via the pressure means (18; 118) on a second base support body (24), which is movable in a direction perpendicular to the feed direction (A) of the lining tube (2) relative to the base body (8) in order to adapt the diameter of the winding mandrel (1) to different standard diameters of the inner film tube (4) via an adjusting device (26), in particular via a spindle drive (26).
  5. Winding mandrel after one of the Claims 2 until 4 , characterized in that a stop (28) is assigned to the carrier body (20), which limits the movement of the carrier body (20) away from the outside of the base body (8).
  6. Winding mandrel after one of the Claims 1 until 5 , characterized in that a limit switch and/or a position sensor (30) is assigned to the stop (28), when actuated a warning signal is issued and/or a control signal is generated, depending on which an actuator (32) is activated for radially moving apart or together the first and second guide device (10, 12) or further guide devices.
  7. Winding mandrel according to one of the preceding claims, characterized in that the pressure means comprise at least one pneumatic spring element (18), in particular a bellows cylinder (18) or a compressed air cylinder (18), which can be connected to a compressed air source (34) preferably arranged inside the base body (8).
  8. winding mandrel Claim 7 , characterized in that a heating device, in particular an electric heating device, is associated with the compressed air source (34), by means of which the temperature of the compressed air stored in the compressed air source (34) can be changed.
  9. Winding mandrel after one of the Claims 1 until 6 , characterized in that the pressure means comprise at least one mechanical spring (118) with a spring characteristic that is essentially independent of the path, in particular a gas spring (118), a disc spring (118) or a pre-tensioned spiral spring.
  10. Winding mandrel after one of the Claims 1 until 5 , characterized in that the second guide device (12) is suspended from the underside of the base body (8) and the essentially constant force of the pressure means is provided by the self-weight of the second guide device (12).
  11. Winding mandrel according to one of the preceding claims, characterized in that a damping element (36) is provided for damping the movement of the second guide device (12), which acts between the base body (8) and the second guide device (12).
  12. A winding mandrel (1) in a winding device for producing a lining tube (2) for lining ducts and pipelines, which has an inner foil tube (4) and a layer of at least one overlapping wound fiber tape (6) impregnated with a liquid reactive resin arranged thereon, with a base body (8) on which at least two guide devices (210, 212) are mounted, each comprising an endlessly circulating belt (214, 216) over which the inner foil tube (4) is moved in a feed direction (A), characterized in that the first and the second guide devices (210, 212) are mechanically coupled to each other via a central adjusting device (200) mounted on the base body (8), which moves the belts (214, 216) of the first and second guide devices (210, 212) together by the same amount in a radial direction away from the surface of the base body (8), and that a pressure means comprising actuator (218) which actuates the central adjustment device (200) depending on the signals of a pressure sensor (220) contacting the inner foil tube (4) in such a way that the two belts (214, 216) of the guide devices (210, 212) are pressed against the inside of the inner foil tube (4) with a constant pressure force of the same magnitude.

Description

The invention relates to a winding dome in a winding device for producing a lining tube for lining channels according to the preamble of claim 1. 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, after the lining tube is pulled into a sewer to be rehabilitated and expanded with the help of compressed air, is hardened by light from a radiation source. Such a lining hose, as well as a method and a device for manufacturing one, are shown, for example, in the DE 198 23 714 C2 , the DE 10 2013 014 796 A1 and DE 10 2010 018 479 A1 known. The lining tube is manufactured by winding resin-impregnated fiber tapes in a winding device, overlapping them, onto an inner foil tube that is permeable to UV light. This inner foil tube is first mounted on a cantilevered support tube, at the end of which is a winding mandrel over which the inner foil tube is moved during the winding process. The winding mandrel has two or more guide devices in the form of circulating belts that can be moved radially relative to each other to adjust the diameter of the lining tube to a desired duct diameter. This presents a problem: the inner film tubes, which are usually manufactured seamless and onto which the fiber tapes are wound, can have manufacturing-related circumferential tolerances of, for example, up to ± 14 mm. The winding mandrel, over which the inner film tube is guided during the production of the lining tube, must, however, have a diameter that ensures the film is neither too tightly nor too loosely guided onto the circulating belt. Another problem in this context is that the diameter of the winding mandrel is only adjustable when the mandrel is exposed, i.e., before production begins; however, the selected diameter setting cannot be changed during subsequent production. Manufacturing tolerances in the film diameter thus lead to a more or less accurate adaptation of the winding mandrel to the actual film diameter. If the winding mandrel is larger than the film, the film is stretched excessively. If the winding mandrel is smaller than the film, the film is not held securely enough and can shift. In practice, this leads to tensions arising in the inner foil tube, which can sometimes cause wrinkles that adversely affect the strength of the lining tube after curing in a sewer being rehabilitated. Accordingly, it is an object of the present invention to avoid mechanical stress differences and associated wrinkles of the inner foil tube caused by manufacturing-related diameter tolerances of the foil of the inner foil tube during the manufacture of the lining tube. This problem is solved according to the invention by a winding mandrel having the features of claim 1. Further features of the invention are contained in the dependent claims. According to the invention, one, or in the case of large winding mandrels for lining tubes with standard diameters (DN) of more than 600 mm, two, belts of the winding mandrel are spring-mounted. The tension on the inner film tube in the radial direction, i.e., in the direction transverse to the feed direction, thus remains essentially constant even if the diameter of the inner film tube changes due to manufacturing processes. In other words, the diameter of the winding mandrel automatically readjusts itself during ongoing production, so that the film, despite its manufacturing-related diameter tolerances, always exhibits essentially the same tension before and during the winding of the fiber tapes onto the inner film tube. As the applicant has found in this context, although the diameter of the wound liner is changed to the same extent as the diameter of the film by compensating for manufacturing-related diameter changes, such fluctuations in the standard diameter (DN) of the liner do not cause any problems in practice when setting it up and curing it. The suspension of the belt(s) can be achieved in various ways, e.g. with the help of pressure means designed as pneumatic cylinders, preferably bellows cylinders, or as mechanical springs, e.g. gas springs or coil springs, which have a comparatively small spring constant and are pre-tensioned to generate the required contact forces in order to produce a force that is as path-independent and essentially constant as possible. The invention is described below with reference to the drawings and by way of preferred embodiments. The drawings show: 1 a schematic side view of a winding device with a winding dome according to the invention during the production of a lining hose, 2 a schematic detail view of a first embodiment of the invention, in which the pressure means are designed as pneumatic spring elements connected to a compressed air source, 3 a schematic side view of a second embodiment of the invention, in which the pressure means are designed