Method for manufacturing lined hoses for repairing fluid conduction pipeline systems

Abstract

The present invention relates to a method for manufacturing a lining hose for repairing a fluid conduction pipeline system, comprising a circumferentially closed inner film hose and at least one resin-impregnated fiber tape wrapped around the inner film hose, characterized in that during the winding process, the inner film hose is supplied to the rear end of a winding device in the supply direction, and energy is supplied to the winding device wirelessly.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a lining hose for repairing a fluid conduction pipeline system, which includes a circumferentially closed inner film hose and at least one resin-impregnated fiber tape wound around the inner film hose.

Background Art

[0002] A particularly excellent method for repairing a fluid conduction pipeline system (for example, a channel and a similar piping system) is to introduce a flexible fiber hose impregnated with a reactive resin (functioning as a lining hose (liner)) into the pipeline system, expand it to closely fit the inner wall of the pipeline system, and then cure the resin.

[0003] Corresponding lining hoses having a fiber material in a support structure are known and described in the literature. These known lining hoses generally consist of an inner film hose to which a support structure is applied.

[0004] The inner film hose is used as a pre-manufactured seamless circumferentially closed hose, or is formed by joining the longitudinal ends of a flat film, or is formed by welding the longitudinal ends of two flat films.

[0005] Patent Document 1 discloses a method for manufacturing a tubular lining hose that is formed into a hose shape by spirally winding a resin-impregnated fiber tape. In this method, first, a film hose is manufactured by spirally winding a film strip to form an inner protective film, and then a resin-impregnated fiber tape is wound thereon. This manufacturing apparatus requires a welding apparatus, which leads to complication of the apparatus and economic disadvantages.

[0006] Patent Document 2 discloses a method for manufacturing a lining hose for lining channels and pipelines. In this method, the lining hose consists of a circumferentially closed inner film hose and at least one resin-impregnated fiber tape wrapped around the inner film hose, and the pre-fabricated inner film hose is wrapped around a freely fixed retaining tube in the opposite direction to the supply direction in a winding device.

[0007] Patent Document 3 discloses a winding apparatus for manufacturing a lining hose having a winding manddel. In this winding apparatus, the winding manddel has a supply section through which an inner film hose passes, and spaced apart from the supply section are a support device that is movable toward the supply section and supports the winding manddel, and a support device that is movable away from the supply section and advances the film hose. Similar to Patent Document 2, the hose, which functions as the inner film hose, is attached to the supply section in the opposite direction to the supply direction before the actual winding process.

[0008] Patent Document 4 describes a winding mandrel in a winding apparatus for manufacturing lined hoses, in which the inner film hose is supplied from a supply section in the supply direction during the winding process. Again, the length of the supply section determines the maximum manufacturable length of the finished lined hose, and the inner film hose needs to be attached to the supply section of the winding mandrel before the winding process. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] German Patent Application No. 4326503 [Patent Document 2] International Patent Application No. 2017 / 059937 [Patent Document 3] German Patent Application No. 19823714 [Patent Document 4] European Patent Application No. 3178633 [Overview of the project]

[0010] In the conventional techniques described above, the length of the retaining tube or supply section to which the inner film hose must be fitted before the winding process determines the maximum length of the inner film hose that can be fitted. This limits the maximum length of lining hose that can be manufactured before it becomes necessary to interrupt the winding process and fit a new inner film hose to manufacture a new hose section. However, it is desirable to manufacture longer lining hoses in a single process without interrupting the winding process. When longer lengths are required, it becomes necessary to join sections of lining hose to compensate for the length that cannot be manufactured in a single continuous winding process, but this joining poses a risk to the airtightness and stability of the system.

[0011] Therefore, an object of the present invention is to provide a method in which the maximum length of a lining hose that can be manufactured in a single continuous process is not limited by the maximum length of the inner film hose that can be attached to the supply section of the winding mandrel.

[0012] This objective is achieved by the method described in claim 1 of the present invention. Preferred embodiments of the method are shown in the dependent claims and the following description.

[0013] In the method for manufacturing a lining hose for repairing a fluid conduction pipeline system according to the present invention, which includes a circumferentially closed inner film hose and at least one resin-impregnated fiber tape wrapped around the inner film hose, the inner film hose is supplied to the rear end of the winding device in the supply direction during the winding process, and the power supply of the winding device is wireless. Thus, while in the prior art a limited length of the inner film hose had to be attached to the supply unit in the opposite direction to the supply direction before the winding process, in the present invention it is preferable to continuously supply the inner film hose from the rear end of the winding device in the supply direction during the winding process. In the prior art the power and control of the winding device were supplied via cables from the rear end of the winding device, so it was not possible to continuously supply the inner film hose to the rear end of the winding device in the supply direction during the winding process. This is because the power and control cables prevented this.

[0014] The inner film hose is supplied to the rear end of the winding device by a unit preferably designed and configured for continuous supply of the inner film hose. This is, for example, a supply roll that holds an inner film hose of a length corresponding to the desired length of the lining hose to be manufactured, and can be continuously supplied to the rear end of the winding device in the supply direction at a speed corresponding to the transport speed during winding of the hose during the winding process. Thus, the feasible length of the lining hose is no longer limited by the length of the inner film hose that must be pre-installed in the winding mandrel or a storage unit connected to the winding mandrel before the winding process. Furthermore, continuous supply of the inner film hose during the winding process is simpler and avoids the risk of damage during the winding process because there are no folds that occur when pre-installed.

[0015] Appropriate devices for supplying the inner film hose to the rear end of the winding device are well known to those skilled in the art and are described in the literature; therefore, no further explanation is needed in this regard. Those skilled in the art will select an appropriate device based on general technical knowledge, depending on the desired form of the winding process and the specific requirements of the application. [Modes for carrying out the invention]

[0016] In one embodiment, the inner film hose is supplied to the rear end of a winding device equipped with two or more movable retaining beams and clamping devices. During the supply of the inner film hose, these clamping devices are alternately opened and closed to allow for stepwise supply in the supply direction. For this purpose, the clamping device closest to the rear end of the winding device is opened first, allowing the inner film hose to advance to the next clamping device in the supply direction. Then, the clamping device closest to the rear end is closed, and the next clamping device in the supply direction is opened, allowing the inner film hose to advance further between the rear-end and front-end clamping devices. By alternately opening and closing the clamping devices, it is possible to supply any length of inner film hose during the winding process. Those skilled in the art are familiar with such mechanical designs and will use general knowledge to select an appropriate configuration.

[0017] Alternatively, the winding cylinder or winding mandrel of the winding device can be suspended in a floating state, that is, suspended without holding beams and similar support structures. This can be achieved, for example, by using a magnetic field strong enough to allow the winding cylinder to levitate freely. This simplifies the process of supplying the inner film hose to the rear end of the winding device, as it eliminates the need to alternately open and close the mobile clamping device.

[0018] In one embodiment of the method of the present invention, the energy required to drive the winding cylinder or winding mandrel is supplied contactlessly via a non-wired or wireless electromagnetic field, rather than via electrical wires and electrical contacts.

[0019] In the case of wireless energy transmission, short-distance energy supply and long-distance energy transmission are distinguished.

[0020] Wireless energy transmission in the short-distance region is also called non-radiative coupling. In non-radiative coupling in the short-distance region, wave phenomena do not play a role.

[0021] The most common form in this context is inductive energy transmission, and thus it is preferably adopted in the present invention as well. This method has good efficiency, and its efficiency depends on the distance between the transmitter and the receiver. Usually, the shorter the distance between the transmitter and the receiver, the higher the efficiency.

[0022] In inductive energy transmission by inductive coupling, an alternating magnetic field is generated by an oscillator in the transmitter. Transmission is usually carried out by mutual induction between two coils respectively arranged in the transmitter and the receiver. An alternating voltage is induced in the receiving coil by the alternating current of the transmitting coil. Using this, energy supply and control become possible. The operating principle corresponds to that of a transformer in which two coils are loosely coupled. The distance between the two coils represents the wireless transmission path, and in order to achieve the highest efficiency, it needs to be made as short as possible.

[0023] Resonant inductive coupling, which can also be used in the method of the present invention, is an extended form of inductive coupling and is originally aimed at extending the inherently short transmission distance. For this purpose, one or more passive resonant circuits are arranged in the free space part between the transmitting coil and the receiving coil. Each of these resonant circuits is composed of a capacitor and a coil whose resonant frequency matches the transmission frequency. Due to the resonance between the resonant circuits, the magnetic coupling between the transmitting coil and the receiving coil is improved at the transmission frequency, and a wider range and higher efficiency are achieved.

[0024] In capacitive coupling, a basic structure similar to inductive transmission is used, but an electric field is used for wireless energy transmission. Metal plates form an electrical capacitance structurally, and the region between the two plates serves as the path for wireless energy transmission. An alternating voltage generated by an oscillator on the transmitting side is usually applied to the two capacitances. On the receiving side, rectification is performed as needed, and a DC voltage is supplied to the actual consumer device.

[0025] Long-distance energy transmission is also called radiative energy transmission and is based on electromagnetic waves. Examples include energy transmission using light, lasers, or radio.

[0026] The main difference between non-radiative near-field coupling and radiative long-distance transmission lies in the range. Near-field coupling is limited to a distance of about several centimeters to several meters between the transmitter and the receiver. However, compared to long-distance transmission, it is possible to transmit energy at a higher power level and with higher efficiency.

[0027] In another embodiment, the wireless energy supply is performed via a power storage device integrated into a winding cylinder or a winding mandrel. This power storage device is charged before the winding process and then supplies the energy required for the winding process. After the completion of the winding process, the power storage device is recharged in the preparation stage for the next winding process and supplies the energy required for the next winding operation. Or, a power storage device that has been completely or partially discharged during the winding process can be simply exchanged with a charged replacement power storage device.

[0028] In yet another example, the power storage device is configured to be continuously charged wirelessly (e.g., inductively) during the winding process, enabling continuous operation without interruption due to the replacement of the power storage device.

[0029] As is clear from the above, in principle, any structural design that enables wireless supply of the required energy is possible.

[0030] It is essential that the winding device does not require an energy supply via cable at its rear end. Such a cable would make it impossible to supply an internal film hose of any length to the rear end of the winding device.

[0031] In the method of the present invention, at least one resin-impregnated fiber tape is wrapped around an inner film hose supplied to the rear end and cured, preferably with light, more preferably with UV light. Alternatively, curing by heat, steam, hot water, or ionizing radiation or other radiation is also possible. For chemical curing, curing agents well known to those skilled in the art can be used.

[0032] The corresponding methods are known to those skilled in the art and are described in the literature. For details, see, for example, Patent Documents 1, 3, and 2.

[0033] The method of the present invention is, in principle, applicable to the manufacture of a lining hose formed by wrapping at least one resin-impregnated fiber tape around an inner film hose, including those known to those skilled in the art in various embodiments in the literature. There are no limitations on the materials that can be used and the structure of the lining hose that can be manufactured.

Claims

1. A method for manufacturing a lining hose for repairing a fluid conduction pipeline system, comprising a circumferentially closed inner film hose and at least one resin-impregnated fiber tape wrapped around the inner film hose, A method for manufacturing a lining hose, characterized in that the inner film hose is supplied to the rear end of the winding device along the supply direction during the winding process, and the power supply to the winding device is wireless.

2. The method according to claim 1, characterized in that the wireless power supply is performed by induction.

3. The method according to claim 2, characterized in that the inductive power supply is performed by non-radiative coupling.

4. The method according to claim 1 or 2, characterized in that the wireless power supply is performed by a power storage device.

5. The method according to claim 3, characterized in that the power storage device is inductively supplied with power through an inner film hose.

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