Mobile inversion drum

Abstract

Mobile inversion drum for pipe liner rehabilitation using the inversion method, with a filling opening and an outlet opening. a mobile pressure chamber (1) to whose filling opening and whose outlet opening a lock chamber (11) can optionally be attached or attached and can be removed as required, wherein the filling opening and the outlet opening of the pressure chamber (1) each have a quick-connect flange (8, 9) for optionally flange-fitting the lock chambers (11), and that the lock chambers (11) have at least on one side quick-connect flanges (11c) compatible with the quick-connect flanges (8, 9) of the pressure chamber (1) and on the opposite side quick-connect flanges (11d) that are optionally compatible with quick-connect flanges of accessory elements: heating head (12), end cap (13), extension hose (14) and inversion head (15), can be ordered, and the lock chamber (11) or lock chambers (11), or the heating head (12), or the closure cover (13), or the extension hose (14), or the inversion head (15) are connected via a quick-release fastener (10), characterized by that a transverse wave (7a) is arranged inside the pressure chamber (1).

Description

[0001] The invention relates to a mobile inversion drum for pipe liner rehabilitation using the inversion method.

[0002] Deteriorated pipes and sewers, such as sewers, drains, storm drains, or pipes in industrial plants (hereinafter collectively referred to as "pipe"), are often rehabilitated by inserting a so-called cured-in-place pipe (CIPP) liner into the pipe using an inversion process. The inversion drum is used to insert the CIPP liner into the pipe. This is done by first coating the inside of the liner with a hardening resin shortly before insertion. The liner is then inserted into the inversion drum through a filling opening. Its front end is inverted and clamped to an inversion head at the outlet, while its rear end is tied and secured with a retaining strap. The filling opening is then sealed airtight with a cover. Finally, the inversion drum is pressurized with air, steam, or water at high pressure.The pressure forces the liner through the inversion head, progressively inverting it into the pipe, while simultaneously pressing the now-exposed, resin-coated side against the pipe wall. If the liner was wound onto an internal shaft during filling of the inversion drum, the insertion speed can be manually adjusted using a crank on the drum's shaft, in addition to pressure control. If, however, the liner was packed into the inversion drum in layers, the insertion speed can be adjusted by winding the retaining strap onto the shaft and then unwinding it in a controlled manner using the crank. To cure the liner, heated air, steam, or water is then circulated through the drum. The inversion drum remains connected during the curing process, which takes several hours.Finally, the tied end is cut open at an inspection shaft or similar, the retaining strap is pulled in, and any inlets are cleared if necessary. Another curing method involves slowly pulling a sled or cart with a UV or IR light chain through the pipe liner.

[0003] A major problem arises from the limited capacity of an inversion drum when it comes to rehabilitating longer stretches, because a consistently continuous rehabilitation is not possible in the manner described, which impairs the rehabilitation result.

[0004] Furthermore, pressurized gas or steam naturally escapes from the inverted hose liner each time the filling opening is opened for refilling, which leads to a loss of quality.

[0005] Another problem is the long operating time of an inversion drum on a construction site, because the drum must remain connected until the pipe liner has hardened.

[0006] It is already known from DE 10 2004 043 383 B4 to connect one or two lock chambers to an inversion head. While this allows for a kind of continuous rehabilitation by introducing a few meters of pipe liner in stages, first through one lock chamber with the second closed, and then through the second open lock chamber with the first closed, into the inversion head, this method is time-consuming.

[0007] The object of the invention is therefore to modify a known inversion drum in such a way that pipe lining rehabilitation without length limitations and without pressure losses is possible quickly and to a high standard. Furthermore, the inversion drum should be able to be removed during the curing process in order to be used at another construction site.

[0008] The problem is solved according to the invention by the features of independent claims 1 and 11. Advantageous embodiments are specified in dependent claims 2 to 10 and 12 to 14.

[0009] The invention transforms an inversion drum into a versatile pressure chamber with lock chambers connected or connectable on both sides, enabling not only continuous rehabilitation but also allowing work to be carried out without pressure loss within the pipe liner throughout the entire rehabilitation process. All accessories commonly used for rehabilitation work are equipped with compatible connections and can therefore be used in numerous combinations.

[0010] The invention will be explained in more detail using an exemplary embodiment.

[0011] The accompanying drawings show Fig. 1. a pressure chamber 1 with various accessories and Fig. 2 a lock chamber of pressure chamber 1 with double-sided flange connections shown in more detail.

[0012] A mobile pressure chamber 1 has a front pair of wheels 2, a rear support 3, and a folding handle 4 for pushing or pulling by hand. On the top of the pressure chamber 1 is a sight glass 5 and various fittings 6 for pressurizing the pressure chamber 1 with air pressure, steam pressure, or water pressure. On the side is a lockable hand crank 7, which drives a transversely mounted shaft 7a inside the pressure chamber.

[0013] On the side of support 3, a flange 8 is welded to a filling opening on the pressure chamber 1, and on the side of wheel pair 2, a flange 9 is welded to an outlet opening. Both flanges 8 and 9 may or may not have identical dimensions and are suitable for the pressure-tight flanged connection of the elements described below using quick-release fasteners 10, such as quick-release clamps 10.

[0014] Two lock chambers 11 indispensable for an endless refurbishment, as described, for example, in DE 10 2004 043 383 B4 of the applicant and in Fig. The components, which are shown schematically again in Figure 2, consist mainly of two shell-like chamber halves 11a, 11b, which are flanged to one another and together form connection flanges 11c, 11d at their end faces, which are compatible with the respective flanges 8, 9 of the pressure chamber 1. The flange 8 of the pressure chamber 1 is compatible with the flanges 11c, 11d of the lock chamber 11, and the flange 9 at the outlet opening is compatible with the flanges 11c, 11d of another lock chamber 11. Preferably, however, all flanges 8, 9 of the pressure chamber 1 and flanges 11c, 11d of the lock chambers 11, as well as the other accessory elements to be described later, are compatible with each other.

[0015] The flanges 11a - 11d of the lock chamber 11 are used to bend and clamp two flat rubber flap seals 11e, 11f into a U-shape, creating a slot-like opening along the entire length of the lock chamber 11 for a pipe liner. The flap seals 11e, 11f simultaneously seal the chamber halves, each of which carries a pressure medium connection 11g, 11h. When pressure is applied to the pressure medium connections 11g, 11h, the flap seals 11e, 11f close the slot-like opening with virtually no pressure loss. With the pressure medium switched off, the pressure chamber 1 can be easily filled with pipe liner through this opening.

[0016] Of course, the described lock chamber 11 can also be replaced by any other suitable design.

[0017] A heating head 12 is an accessory element that, with its connection flange 12a, which is compatible with at least the flange 8 of the pressure chamber 1, can be pressure-tightly connected to the flange 8 of the pressure chamber 1 or to the flange 11d of the inlet-side lock chamber 11 by means of a quick-release clamp 10. The heating element can be an air, steam, or water heater, which heats the pipe liner to cure its resin outer layer. Corresponding connections 12b for the flow and return are provided. The heating head 12 can also be connected to the flange 11c or 11d of a lock chamber 11. Instead of a heating head 12, a flow heating hose and a return heating hose (both not shown) can also be used for the heating circuit. Both hoses are inserted into the system through the flap seal 11e, 11f and the filling flange 8.The flap seal 11e, 11f adequately seals the pressure chamber 1 to the outside even when pressure is applied to the valve chambers 11a, 11b of the lock chamber 11.

[0018] It is also possible that shaft 7a has a connection for heating water. For this purpose, shaft 7a is provided with a through-hole and an external connection (not shown). An outlet valve 16 can be arranged at the bottom of pressure chamber 1, with which the heating water can be drained after the renovation is complete.

[0019] Another accessory element is a sealing cover 13, which, with its flange 13a which is at least compatible with the flange 8 of the pressure chamber 1, can be connected pressure-tight to the flange 8 of the pressure chamber 1 or to the connection flange 11d of the outlet-side lock chamber 11 by means of a quick-release clamp 10, e.g. after removing the lock chamber 11 and reversing the hose.

[0020] Another accessory element is a pressure-resistant extension hose 14, which can be pressure-tightly connected to the outlet flange 9 of the pressure chamber 1 or to the outlet flange 9 of the outlet-side lock chamber 11 with its compatible inlet flange 14a using a quick-release clamp 10. A compatible inversion head 15 can also be pressure-tightly connected to the outlet flange 14b of the extension hose 14 using a quick-release clamp 10. This allows valuable pipe liner length to be saved down to the shaft base. Preferably, the flanges 14a and 14b of the extension hose 14 are identical.

[0021] The inversion head 15 also fits the outlet flange 9 of the pressure chamber 1. It can therefore be connected directly to the flange 9 of the pressure chamber 1 in a pressure-tight manner, or, according to a preferred variant, to a lock chamber 11 connected to the outlet flange 9 of the pressure chamber 1 in a pressure-tight manner. Either the extension hose 14 or the inversion head 15 can then be connected to this lock chamber on the outlet side in a pressure-tight manner.

[0022] In the Fig. 1 and Fig. 2. All connection flanges are drawn as circular. They can, of course, also have a different shape, for example rectangular. Likewise, the drum-shaped pressure chamber 1 can have a different shape, for example, it can be barrel-shaped or cylindrical.

[0023] Whenever flanges or connecting flanges 11c, 11d; 12a; 13a; 14a, 14b; 15a and quick-release fasteners 10 are mentioned, all suitable pressure-tight quick-connect devices are to be included in accordance with the invention, i.e., for example, Renk connections with coupling attachments, such as those commonly used for fire hoses, or connections that can be connected or are connected to each other by means of quick-release screws.

[0024] The invention allows for the modification of very different working methods.

[0025] A possible working configuration for continuous rehabilitation consists of a first lock chamber 11 being connected to the filling flange 8 of pressure chamber 1 by means of a quick-release clamp 10, and a second lock chamber 11 being connected to the outlet flange 9 by means of another quick-release clamp 10. The extension hose 14 is connected to the outlet flange 11d of the second lock chamber by means of another quick-release clamp 10, and the inversion head 15 is connected to its outlet flange 14b by means of yet another quick-release clamp 10. A resin-impregnated pipe liner is pulled in by hand through the first lock chamber 11, and then through pressure chamber 1, the second lock chamber 11, the extension hose 14, and the inversion head 15. Its end is folded over at the mounting flange 15b of the inversion head 15 and secured there with a quick-release clamp 10.The other end is knotted to create a pressure-tight seal and fitted with a retaining strap that can be wound onto the shaft of pressure chamber 1. Using a pressure medium, introduced, for example, through the fittings 6 of pressure chamber 1, the pipe liner is continuously inverted and migrated into the pipe to be rehabilitated, where it adheres tightly to the pipe wall.

[0026] After the pipe liner has been installed, the second lock chamber 11 can be closed and disconnected from the pressure chamber 1. A heating head 12 can then be connected to the inlet flange 11c of the second lock chamber 11, allowing the pipe liner to be cured without pressure loss. The heating head 12 has corresponding connections 12b. This frees up the pressure chamber 1 for further use. Of course, curing can also be carried out via the heating head 12 connected to the inlet flange 11c of the first lock chamber 11, or, with the first lock chamber 11 removed, via the heating head 12 connected directly to the pressure chamber 1.

[0027] According to one variant, the extension hose 14 can also be flanged between the pressure chamber 1 and the second lock chamber 11.

[0028] According to one variant, the heating head 12 is connected directly to the inlet flange 14a of the extension hose 14 or directly to the inlet flange 15a of the inversion head 15.

[0029] One possible working configuration for a final rehabilitation operation involves winding the prepared pipe liner through the filling opening and into the pressure chamber 1 along its entire length. The filling flange 8 is then sealed pressure-tight with the sealing cap 13 or the heating head 12. A lock chamber 11, or a lock chamber 11 and an extension hose 14, is optionally connected between the outlet flange 9 and the inversion head 15. Alternatively, the inversion head 15 can be connected directly to the outlet flange 9 of the pressure chamber 1. This allows the entire supply of pipe liner from the drum to be used for shorter rehabilitation sections.

[0030] The two configurations mentioned are only examples of the many other working configurations and methods made possible by the invention. Reference sign 1 pressure chamber 2 wheel pairs 3 Support pressure chamber 4 folding bars 5 sight glass 6 fittings 7 Hand crank wheel 7a Wave of the pressure chamber 8 Flange at filling opening 9 Flange at outlet opening 10 Quick-release fasteners, quick-release band clamps 11 Lock chamber 11a Valve chamber 11b Valve chamber 11c connection flange 11d connection flange 11e Flap seal 11f Flap seal 11g pressure medium connection 11h Pressure medium connection 11i longitudinal flange 11k longitudinal flange 12 Heating head 12a Connection flange 12b Heating connections 13 sealing caps 13a Connection flange 14 Extension hose 14a Connection flange 14b Connection flange 15 Inversion head 15a Connection flange 16 Drain valve for pressure chamber

Claims

[1] Mobile inversion drum for pipe liner rehabilitation using the inversion method with a filling opening and an outlet opening, a mobile pressure chamber (1) to whose filling opening and whose outlet opening a lock chamber (11) can optionally be attached or attached and can be removed as required, wherein the filling opening and the outlet opening of the pressure chamber (1) each have a quick-connect flange (8, 9) for optionally flange-fitting the lock chambers (11), and that the lock chambers (11) have quick-connect flanges (11c) on at least one side that are compatible with the quick-connect flanges (8, 9) of the pressure chamber (1) and quick-connect flanges (11d) on the opposite side that are optionally compatible with quick-connect flanges of accessory elements: heating head (12), end cap (13), extension hose (14) and inversion head (15), can be ordered, and the lock chamber (11) or lock chambers (11), or the heating head (12), or the closure cover (13), or the extension hose (14), or the inversion head (15) are connected via a quick-release fastener (10), characterized by , that a transverse wave (7a) is arranged inside the pressure chamber (1). [2] Mobile inversion drum according to claim 1, characterized by , that the quick connection flanges (11c, 11d; 12a, 13a, 14a, 14b, 15a) of the accessory elements: heating head (12), end cap (13), extension hose (14) and inversion head (15) are compatible with each other at least on one side. [3] Mobile inversion drum according to claim 1 and 2 , characterized by, that the quick-connect flanges (8, 9) of the pressure chamber (I), the quick-connect flanges (11c, 11d) of the lock chambers (11) and all quick-connect flanges (12a; 13a; 14a, 14b; 15a) of the accessory elements: heating head (12), sealing cover (13), extension hose (14), inversion head (15) have identical connection dimensions. [4] Mobile inversion drum according to at least one of the preceding claims, characterized by t that a lock chamber (11) or a heating head (12) or a sealing cover (13) is pressure-tightly flanged to the quick-connect flange (8) of the filling opening of the pressure chamber (1). [5] Mobile inversion drum according to at least one of the preceding claims, characterized by t that a lock chamber (11), an inversion head (15), a closure cover (13) or an extension hose (14) is pressure-tightly flanged to the quick-connect flange (9) of the outlet opening of the pressure chamber (1). [6] Mobile inversion drum according to at least one of the preceding claims, characterized by , that a heating head (12) or a sealing cover (13) is flanged to the entrance of a filling-side lock chamber (11). [7] Mobile inversion drum according to at least one of the preceding claims, characterized by , that an extension hose (14), an inversion head (15) or a closure cover (13) is flanged to the outlet of a lock chamber (11) flanged on the outlet side. [8] Mobile inversion drum according to claim 7, characterized by , that an inversion head (15) is flanged to the outlet of the extension hose (14). [9] Mobile inversion drum according to any one of claims 1 to 8, characterized by, that a lock chamber (11) has two semi-shell-like valve chambers (11a, 11b) detachably connected via longitudinal flanges (11i, 11k), wherein both valve chambers (11a, 11b) additionally have end flanges (11c, 11d) on both sides, and wherein the longitudinal flanges (11i, 11k) clamp two flexible flap seals (11e, 11f) machined from flat sealing material in a pressure-resistant manner, the free ends of which are folded over to the end flanges (11c, 11d) of the valve chambers (11a, 11b) and clamped pressure-tight, whereby the flap seals (11e, 11f) form a slot-shaped, flat seal for the flat-lying pipe liner, and wherein to the two opposing, closed by the flap seals (11e, 11f) Valve chambers (11a, 11b) and ports (11g, 11h) for a pressure medium (air) for controlling the slot seal. [10] Mobile inversion drum according to at least one of the preceding claims, characterized by, that two quick-connect flanges (11c, 11d; 12a; 13a; 14a, 14b; 15a) can be connected or joined together using flange coupling attachments, quick-release screws or a quick-release fastener (10). [11] Mobile inversion drum for pipe liner rehabilitation using the inversion method according to claim 1, characterized by , that a mobile pressure chamber (1) has a lock chamber (11) on both the filling and outlet sides and that an inversion head (15) or a connecting hose (14) with a downstream pressure-tight inversion head (15) is arranged at the outlet of the outlet-side lock chamber (11), and that the lock chambers (11) are connected via quick-release fasteners (10), and that a transverse shaft (7a) is arranged inside the pressure chamber (1). [12] Mobile inversion drum according to claim 11, characterized by, that a heating head (12) or a sealing cover (13) is arranged on the entrance side of the lock chamber (11). [13] Mobile inversion drum according to claim 12, characterized by , that a flow heating hose and a return heating hose for heating water are introduced through the inlet-side lock chamber (11). [14] Mobile inversion drum according to claim 11, characterized by , that a through-bore is arranged in the transverse shaft (7a) through which heating water can be admitted from an external connection (16) on the shaft (7a) into the pressure chamber (1), and that the pressure chamber (1) has an outlet valve (16) for heating water on its bottom side.

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