Lining device for lining a sewer branch line

Abstract

Lining device for lining a branch line (3) branching off from a main channel (2) with a lining hose (4), comprising at least a) a receiving chamber (5) for receiving the lining hose (4), wherein the receiving chamber (5) has a cylindrical geometry with an axis of rotation (6) and a cylindrical receiving chamber outer circumferential surface (7), and the cylindrical receiving chamber outer circumferential surface (7) has a straight receiving chamber support line (8) that is parallel to the axis of rotation (6), b) at least a first reducing element (9) that is attached to a first axial end face of the receiving chamber (5), and has a truncated cone geometry with a reducing element outer circumferential surface (11) in the form of an oblique truncated cone, wherein a contour line of this oblique truncated cone lies on the reducing element outer circumferential surface (11) and forms a straight first reducing element support line (13),which is aligned with the receiving chamber support line (8), c) a deflecting piece (15) which is attached to an axial side of the first reducing piece (9) facing away from the receiving chamber (5), and which is provided at an end facing away from the first reducing piece (9) with a blow-out nozzle (16) for attaching one end of the lining hose (4), wherein the connection between the first reducing piece (9) and the deflecting piece (15) is designed such that the position of the blow-out nozzle (16) is adjustable and adaptable to the position of an inlet of the channel branch line (3) into the main channel (2), d) a pressurizing means (32) for pressurizing the pressure-tight design and the receiving chamber (5),a unit formed by at least the first reducing piece (9) and the deflecting piece (15) with a blow-out pressure for blowing out a lining hose (4) located in the receiving chamber (5) and attached to the blow-out nozzle (16) from the blow-out nozzle (16), ande) a second reducing piece (10) which is attached to a second axial end face of the receiving chamber (5) facing away from the first reducing piece (9), and which also has a truncated cone geometry with a reducing piece outer circumferential surface (12) in the form of an oblique truncated cone, wherein a contour line of this oblique truncated cone lies on the reducing piece outer circumferential surface (12) and forms a straight second reducing piece support line (14) which is aligned with the receiving chamber support line (8),f) wherein the second reducing piece (10) is connected on a side facing away from the receiving chamber (5) to a stabilizing element (18),which forms a continuation of the second reducing piece support line (14).

Description

The invention relates to a lining device for lining a branch line leading from a main channel with a lining hose. This lining device has a receiving chamber for receiving the lining hose. There are known lining devices and methods for the rehabilitation of leaking or otherwise damaged pipelines, such as sewer pipes, in which a lining liner is inserted into the defective pipeline to repair the damaged area. The lining liner used is sometimes called an inliner or simply a liner. It can be a textile liner impregnated with a curable polymer resin. After the lining liner, which was previously inserted into the defective pipeline, has cured, a pipe-within-a-pipe structure is created, restoring the pipeline's functionality. Various methods and / or devices exist for inserting the lining hose. German patent application DE 10 2005 036 334 B4 describes such a device, which has a pressurizable receiving chamber for the lining hose to be inserted. The receiving chamber is connected via an angled pipe section to a connecting piece to which one end of the lining hose is attached. This device is attached directly to the pipeline to be rehabilitated via the connecting piece, in order to blow the lining hose from the receiving chamber into the pipeline using compressed air. The use of this device is limited to cases where the pipeline to be rehabilitated is accessible from the outside. It is unsuitable, however, for rehabilitating a branch line leading from a main sewer that is inaccessible or at best very difficult to access and has a smaller diameter than the main sewer. The method and associated device described in DE 699 16 681 T2 are also suitable for inserting a lining liner into a sewer branch line with difficult access. The special lining liner used is equipped with a hardened flange at the end that is to be positioned at the point where the sewer branch line enters the main sewer. For transport to the entry point, the lining liner is housed in a backpack. Transport through the main sewer and the positioning of the flange at the entry point are carried out by a special sewer robot. This robot has a complex design, and its use is quite complex. Furthermore, equipping the lining liner with the positioning flange also involves considerable effort.This is unfavorable, as the effort required and the associated costs often represent a significant decision factor in sewer rehabilitation. US Patent 2003 / 0 178 078 A1 describes a method and the associated device for lining a branch line of a main sewer. The lining is carried out using a lining hose, which is housed in a receiving chamber of the device and ejected via an ejector unit. This ejector unit is brought to the branch line to be lined by a robot and inserted a short distance into the pipe. Part of this ejector unit has the geometry of an oblique truncated cone. Overall, however, the method and the device are complex. A robot is required for operation, resulting in considerable acquisition and operating costs. In many towns and cities, the sewer lines up to the property line are municipal property and must be maintained by the municipality up to that point. To avoid the frequent disagreements between authorities and property owners in this regard, the sewer lines branching off to the property are repaired starting from the main sewer. If the main sewer is inaccessible, this presents a significant technical challenge that can only be overcome with complex equipment, such as that described above. The associated costs are either too much or too much for the municipalities to bear. The object of the invention is to provide a lining device of the type described above which has improved handling compared to the prior art. To solve this problem, a lining device according to the features of claim 1 is specified. The lining device according to the invention has a receiving chamber having a cylindrical geometry with an axis of rotation and a cylindrical receiving chamber outer circumferential surface, wherein the cylindrical receiving chamber outer circumferential surface has a straight receiving chamber support line that is parallel to the axis of rotation. Furthermore, the lining device has at least one first reducing element attached to a first axial end face of the receiving chamber and having a truncated cone geometry with a reducing element outer circumferential surface in the form of an oblique truncated cone, wherein a contour line of this oblique truncated cone lies on the reducing element outer circumferential surface and forms a straight first reducing element support line that is aligned with the receiving chamber support line.Furthermore, the lining device comprises a deflection piece attached to an axial side of the first reducing piece facing away from the receiving chamber, and which is provided at one end facing away from the first reducing piece with a blow-off nozzle for the particularly pressure-tight attachment of one end of the lining hose. The connection between the first reducing piece and the deflection piece is designed such that the position of the blow-off nozzle is adjustable and adaptable to the location of the junction of the sewer branch line and the main sewer. In addition, the lining device has a pressurizing device for pressurizing the pressure-tight unit formed with the receiving chamber, the at least first reducing piece, and the deflection piece with a blow-off pressure to expel a lining hose located in the receiving chamber and attached to the blow-off nozzle from the blow-off nozzle.Furthermore, the lining device has a second reducing piece, which is attached to a second axial end face of the receiving chamber facing away from the first reducing piece, and also has a truncated cone geometry with a reducing piece outer circumferential surface in the form of an oblique truncated cone, wherein a contour line of this oblique truncated cone lies on the reducing piece outer circumferential surface and forms a straight second reducing piece support line, which is aligned with the receiving chamber support line and thus in particular also with the first reducing piece support line, wherein the second reducing piece is connected on a side facing away from the receiving chamber to a stabilizing element, which forms a continuation of the second reducing piece support line and thus in particular also of the other two support lines, i.e. the receiving chamber support line and the first reducing piece support line. The lining device according to the invention is designed for the rehabilitation of a branch line leading from a main sewer, particularly one that is not accessible to pedestrians. It is characterized by its very simple and efficient operation. Even if access to the branch line via the main sewer is limited, no complex technical equipment is advantageously required for operation. In particular, the use of a sewer robot is not necessary. This significantly reduces the effort required compared to previously known lining devices and methods. The key advantage is that the lining device according to the invention can be fully assembled and set up either outside the sewer or in an easily accessible part of the sewer. It can then be very easily moved to its working position at the point where the sewer branch pipe connects, for example, by simply pulling it through the main sewer using a pull rope. Due to its special design, the lining device automatically reaches the point where the sewer branch pipe connects in the correct position. The position of the discharge nozzle can be adjusted in advance to the known conditions prevailing in the sewer by appropriately mounting the deflection piece on the first reducer and the deflection piece.In particular, the deflection piece, preferably designed in the form of a pipe bend, can be rotated relative to the first reducing piece until the discharge nozzle of the deflection piece is in the correct position. The connection between the deflection piece and the first reducing piece is then fixed in this position. The pipe bend can, for example, have a deflection angle of between 45° and 90°, e.g., 45°, 67°, or 90°. Due to the specially designed first reducing piece with its outer circumferential surface in the shape of an oblique truncated cone, a particularly favorable low center of gravity is achieved. Specifically, the center of gravity is located below the axis of rotation of the receiving chamber. Preferably, the lining device thus rests almost always in a defined position on the inner wall of the main channel with its designated support lines, in particular the support line of the receiving chamber and the corresponding support line of the first reducing piece. This prevents the lining device from tilting or twisting, for example, around the axis of rotation of the receiving chamber, while being pulled through the main channel to its installation location, or even during operation at the installation site. Preferably, the deflection piece is attached directly to the first reducing piece. However, an indirect attachment is also possible, in which at least one further component is arranged between the first reducing piece and the deflection piece, for example an extension piece or a further reducing piece preferably designed similarly to the first reducing piece and in the shape of an oblique truncated cone. The second reducing piece further reduces the risk of the lining device changing position, in particular tilting or twisting as it is pulled through the main channel. The stabilizing element can also be a control element. Preferably, the stabilizing element is hollow so that supply lines can be routed inside it or other components can be at least partially housed within it. In particular, the stabilizing element is pressure-tight. This allows it to be part of a larger pressure-tight unit. Advantageously, the stabilizing element is flexible. This improves its maneuverability and facilitates the preparation of the lining device for operation in confined spaces. The stabilizing element can be designed as a tube or a hose. In both versions, the advantageous stabilizing effect, namely the prevention of tilting or twisting of the lining device, is achieved. Furthermore, the attachment of the lining hose to the discharge nozzle can preferably be direct. However, an indirect attachment or installation is also possible, in which the lining hose is attached to the discharge nozzle indirectly, for example by means of a film, in particular by means of a separating film hose. Advantageous embodiments of the lining device according to the invention result from the features of the claims dependent on claim 1. A favorable design involves positioning the discharge nozzle within a hypothetical cylindrical space, defined by an imaginary axial extension of the cylindrical receiving chamber's outer circumference, in any adjustable and, in particular, technically practical position. This prevents the discharge nozzle from colliding with the main channel's inner wall, for example, when the lining device is being pulled through the main channel. This protects both the discharge nozzle and the main channel's inner wall from damage. According to another advantageous embodiment, at least one fastening device for attaching a pull rope is provided. This makes it very easy to move the lining device to its installation location at the point where the sewer branch line connects. For example, the fastening device could be a fastening eyelet attached to a suitable location on the lining device, particularly on a pipe clamp designed to connect two components of the lining device. Alternatively, the pull rope can also be attached to the discharge nozzle, for example, by simply wrapping it around a flange of the discharge nozzle. According to a further advantageous embodiment, the lining hose, when housed in the receiving chamber, is surrounded along its entire length by an airtight separating film hose, the first end of which is also attached to the blow-out nozzle. In particular, the separating film hose is connected at its second end, the end furthest from the blow-out nozzle, to an inflatable sealing bladder. Preferably, the separating film hose is sealed at its second end. This seal is preferably airtight and pressure-tight. The airtight separating film hose, and especially the seal at the second end, facilitates the insertion of the lining hose into the sewer branch line to be rehabilitated by pressurizing a sealed interior formed by various components of the lining device, and particularly by the separating film hose.Advantageously, the lining hose, unlike the separating foil hose, is not sealed at one end. This allows the use of common and readily available hose types for lining hoses. Furthermore, once cured, there is no need to reopen the lining hose, which forms the pipe-within-a-pipe, to ensure the desired water flow. Otherwise, a seal on the lining hose would have to be milled open, which would be quite labor-intensive. Once the lining hose is inserted into the sewer branch line, it is beneficial to press it against the inner wall of the branch line during the curing process. This is preferably done by applying pressure, ideally the same pressure that was used to blow or insert the lining hose into the branch line.The sealing bladder is specifically designed to ensure the effect of this pressure application during curing, namely to have a pressure-tight interior and, as a result, a radially outward-directed pressure force acting on the inserted lining tube. According to a further advantageous embodiment, the lining hose is connected to a lighting element at one end. This connection can be direct, but preferably also indirect, e.g., via the separating membrane hose and / or the sealing bladder, with the lighting element then preferably attached to the sealing bladder on a side facing away from the separating membrane hose and / or the lining hose. Thus, the lighting required for curing is introduced into the sewer branch line together with the lining hose. No separate work step is required for this, thereby reducing the overall time required for sewer rehabilitation. The lighting element preferably has approximately the same length as the lining hose and is designed to emit light along its entire length.Thus, after being inserted into the sewer branch line to be rehabilitated, the lining hose can be cured along its entire length in a single step using the lighting element. Successive curing of only one section of the lining hose at a time, requiring multiple repositioning of the lighting element, is advantageously unnecessary. This significantly reduces the overall time required for the rehabilitation. According to a further advantageous embodiment, the lighting element comprises an elongated support element to which a plurality of light-emitting diodes (LEDs) are attached. The LEDs are arranged in a distribution, particularly in the longitudinal and circumferential directions. They are preferably UV LEDs. The support element is particularly flexible and, for example, hollow. It preferably has a round cross-sectional geometry. It can, for example, be designed as a support tube. With such a lighting element, a relatively large length of a lining tube inserted into the sewer branch line to be rehabilitated can be cured in a single operation. This contributes to reducing the time required. According to another advantageous embodiment, the LEDs are UV cold LEDs that generate a maximum temperature of 50 °C. This prevents any undesirable shrinkage of the lining tube after curing that might occur at higher temperatures. Further features, advantages, and details of the invention will become apparent from the following description of exemplary embodiments with reference to the drawings. The drawings show: Fig. 1 an exemplary embodiment of a lining device located in a main channel for inserting a lining hose into a branch line of the main channel; Fig. 2 the lining device according to Fig. 1 outside the main channel, equipped with a lining hose and a sealing bladder and UV light wave connected thereto; Fig. 3 a central section of the lining hose surrounded by a separating film hose and to be accommodated in a receiving chamber of the lining device according to Figs. 1 and 2; Fig. 4 the sealing bladder and UV light wave according to Fig. 2 in an enlarged view; Fig. 5 the connection of the separating film hose surrounding the lining hose according to Fig. 3 with the sealing bladder and the UV light wave according to Figs. 2 and 4.6 a closure element of a stabilizing hose located at one end of the lining device according to Fig. 1 and Fig. 2, and Fig. 7 the lining hose fully inserted into the duct branch line with the sealing bladder inflated and the UV light wave in its illumination position. Corresponding parts are provided with the same reference numerals in Figs. 1, 2, 3, 4, 5, 6 to 7. Details of the embodiments described in more detail below can also constitute an invention in themselves or be part of an invention. Figures 1 and 2 show an embodiment of a lining device 1 for lining a branch line 3 branching off from a main sewer pipe 2 that is in need of repair with a lining hose 4. Figure 1 shows a state in which the lining device 1 is in its working position inside the main sewer pipe 2 (which is not accessible) at the junction of the sewer branch pipe 3, so that the lining hose 4 can be inserted into the sewer branch pipe 3 to be rehabilitated. The insertion of the lining hose 4 is indicated by the dashed lines. In Fig. 2, the lining device 1 is shown outside the main sewer pipe 2, but in a ready-to-use, fully equipped state. The components inside the lining device 1, including the lining hose 4, are indicated in Fig. 2. The lining device 1 comprises a cylindrical receiving chamber 5, within which the lining hose 4 is arranged in an accordion-like manner, thus saving considerable space. Corresponding to the cylindrical geometry, the receiving chamber 5 has an axis of rotation 6 (see Fig. 2) and a cylindrical outer circumferential surface 7. The receiving chamber 5 rests, at least with a receiving chamber support line 8, on a similarly cylindrical inner wall of the main sewer pipe 2. The receiving chamber support line 8 is a straight line and part of the cylindrical outer circumferential surface 7. It runs parallel to the axis of rotation 6. A reducing piece 9, 10 is attached to each of the axial end faces of the receiving chamber 5. The attachment can be designed to be interchangeable. The term "axial" here refers to the axis of rotation 6, which also defines the main longitudinal direction of the lining device 1 and which, in the operating state of the lining device 1 shown in Fig. 1, is oriented essentially parallel to a flow direction of the main channel pipe 2. The two reducing pieces 9, 10 each have a truncated cone geometry. Their outer circumferential surfaces 11, 12 each have the shape of an oblique truncated cone, with the contour line of the truncated cone geometry lying on the respective outer circumferential surface 11, 12 and forming a reducing piece support line 13, 14 there. The two reducing piece support lines 13, 14 are also straight lines. They are aligned with the receiving chamber support line 8.Die beiden Reduzierungsstück-Auflagelinien 13, 14 und die Aufnahmekammer-Auflagelinie 8 sind also drei Teil-Auflagelinien, die gemeinsam eine zusammengesetzte Auflagelinie bilden, mittels derer die drei Komponenten der Auskleidungsvorrichtung 1, also die Aufnahmekammer 5 und die daran angeordneten beiden Reduzierungsstücke 9, 10 auf der zylindrischen Innenwand des Hauptkanalrohrs 2 aufliegen. On the axial end face of the first reducing piece 9, facing away from the receiving chamber 5, a deflecting piece 15 in the form of a pipe bend is attached. At one end facing away from the reducing piece 9, the deflecting piece has a discharge nozzle 16. In the illustrated embodiment, the deflecting piece 15 essentially represents a 90° deflection. In alternative embodiments, other deflection angles are also possible, for example, with any value between 45° and 90°. The connection between the first reducing piece 9 and the deflecting piece 15 is fixed but detachable. In the partially detached state, the deflecting piece 15 can be rotated relative to the reducing piece 9, in particular about an axis of rotation (not shown in Figs. 1 and 2) that is oriented parallel to the axis of rotation 6.By rotating the deflector 15 accordingly, the discharge nozzle 16 can be aligned so that – at least when the lining device 1 is correctly positioned in the flow direction of the main sewer pipe 2 – it faces the inlet of the sewer branch line 3. After adjusting the rotational position of the deflector 15, the connection between the reducing piece 9 and the deflector 15 is fixed. This adjustment is made outside the main sewer pipe 2, but with knowledge of the inlet of the sewer branch line 3 to be rehabilitated. In each adjustable rotational position of the deflection piece 15, the discharge nozzle 16 is located within a fictitious cylindrical shell 17 (see Fig. 2), which represents an axial extension of the cylindrical outer circumferential surface 7 of the receiving chamber 5, i.e., in the direction of the axis of rotation 6. This ensures that the discharge nozzle 16 does not collide with the inner wall of the main duct 2 during the pulling movement of the lining device 1 through the main duct pipe 2. This prevents damage to the discharge nozzle 16 and also to the inner wall of the main duct pipe 2. The second reducing piece 10, attached to the other axial end face of the receiving chamber 5, also serves, in particular, to connect a stabilizing hose 18, which represents a continuation of the two reducing piece support lines 13, 14 and the receiving chamber support line 8. The stabilizing hose 18 is optional and, in particular, designed to rest with a portion of its outer circumference on the cylindrical inner wall of the main channel pipe 2. The stabilizing hose 18 is preferably attached to the second reducing piece such that its longitudinal axis 18a, when the stabilizing hose 18 is laid straight, is oriented parallel to the axis of rotation 6 of the receiving chamber 5, but does not coincide with it. In particular, the longitudinal axis 18a of the hose lies or runs in the space between the (extended) axis of rotation 6 and the (extended) receiving chamber support line 8.In contrast to the receiving chamber 5, the two reducing pieces 9, 10 and the deflecting piece 15, which are preferably made of a rigid material, such as a metal, preferably steel, the stabilizing hose 18 has a certain degree of flexibility. It is hollow and made, for example, of a rubber material. To bring the lining device 1 into the operating position shown in Fig. 1 within the main sewer pipe 2, with the discharge nozzle 16 facing the point where the sewer branch line 3 enters, the lining device 1 is pulled along the main sewer pipe 2 by means of a pull rope 19. This is done in the direction of pull 20. At least one fastening means is provided for attaching the pull rope 19 to the lining device 1. In the exemplary embodiment, this is a fastening eye 21 attached to a pipe clamp (not shown) provided for connecting the reducing piece 9 and the deflection piece 15. The pulling of the lining device 1 into the main sewer pipe 2 is monitored by means of a camera 22, which is also inserted into the main sewer pipe 2.As soon as the camera surveillance determines that the blowout nozzle 16 is located at the junction of the sewer branch line 3, the pulling movement of the lining device 1 is stopped in order to then begin inserting the lining hose 4 into the sewer branch line 3 to be rehabilitated. Due to the favorable geometry of the lining device 1, and in particular the reducing pieces 9, 10, it is ensured during the pulling movement within the main sewer pipe 2 that no tilting or rotation of the lining device 1 about the axis of rotation 6 occurs. The truncated conical shape of the reducing pieces 9, 10 advantageously places the center of gravity of the lining device 1 below the axis of rotation 6. This stabilizes the position so that the lining device 1 always rests against the inner wall of the main sewer pipe 2 by means of the three support lines 8, 13, and 14 during the pulling movement within the main sewer pipe 2. The stabilizing hose 18 preferably also supports the maintenance of this position. These stabilizing measures ensure that the discharge nozzle 16 is correctly positioned in its operating position.In particular, this prevents the discharge nozzle 16 from ending up in a position opposite the junction of the sewer branch line 3 to be rehabilitated, due to tilting or twisting of the lining device 1 during its insertion into the main sewer pipe 2. These stabilization measures are very simple yet extremely effective. Advantageously, the considerably more complex use of a robot can be avoided. The lining tube 4 is, for example, designed as a laminate or liner. The laminate may, for example, have or at least contain a fiberglass fabric. The liner may consist of, for example, needle felt, knitted stocking material, velour, or another absorbent material. Furthermore, the lining tube 4 is, in particular, factory-impregnated with a hardening agent, such as a synthetic resin. As can be seen in Fig. 3, the lining tube 4 is surrounded by an airtight separating film tube 23 during its storage within the receiving chamber 5. In the illustrated embodiment, the separating film tube 23 consists of a polyethylene (PE) film that has no or only minimal elasticity. One end of the combined unit of lining tube 4 and surrounding separating film tube 23 is fixed to the discharge nozzle 16. For example, this end can be folded over the discharge nozzle 16, which is preferably equipped with a flange. Preferably, the folded end can then be fixed to the outside of the discharge nozzle 16, e.g., by means of a clamping ring 24. The fixing can be carried out for both the lining tube 4 and the separating film tube 23 (see Fig. 1). In an alternative embodiment not shown, only the separating film tube 23 is attached to the discharge nozzle 16.In this alternative configuration, the separating foil hose 23 extends a short distance beyond the end of the lining hose 4 facing the inlet of the sewer branch line 3. This protruding end is used to attach the hose to the discharge nozzle 16. As shown in Fig. 2, the unit consisting of the lining tube 4 and the separating film tube 23 is connected at its end furthest from the discharge nozzle 16 to further components, namely a sealing bladder 26 and an elongated lighting element 27. The separating film tube 23 is hermetically sealed at this end. This seal is preferably achieved by connecting it to the sealing bladder 26, which is equipped with a connecting eyelet 26a at one end. The tube end of the separating film tube 23 is passed through this connecting eyelet 26a and folded back. The folded-back tube end is fixed, for example, on the outside of the separating film tube 23 by means of a suitable fixing element 25, thus creating both the connection to the sealing bladder 26 and the airtight seal of the separating film tube 23. A suitable fixing element 25 could be, for example, a...Consider using adhesive tape, a cable tie, a Velcro fastener, or the like. At the end of the sealing bladder 26 facing away from the separating film tube 23, there is a further connection between the lighting element 27 and the sealing bladder 26, which in the exemplary embodiment is realized by a compressed air supply hose 28. The lighting element 27 has a hollow carrier tube (not shown in detail) which is pushed over the compressed air supply tube 28. A large number of UV light-emitting diodes 29 are arranged on this carrier tube, distributed particularly evenly along its length and circumference. The UV light-emitting diodes 29 are cold LEDs that generate a maximum temperature of 50 °C, which is advantageous for the curing of the lining tube 4. Higher curing temperatures can lead to undesirable shrinkage. The UV light-emitting diodes 29 are supplied with the electrical energy required for operation via an electrical supply line 30. The lighting element 27 with the carrier tube and the UV light-emitting diodes 29 arranged on it can be understood as a UV cold-light LED array or simply as a UV light array. The stabilizing tube 18 can accommodate at least part of the elongated lighting element 27 within its cavity (see Fig. 2). The hollow stabilizing tube 18 is sealed at its outer end in a pressure-tight manner by a cap 31, shown enlarged in Fig. 6. The cap 31 has several supply connections, including a first compressed air connection 32, by means of which the pressure-tightly interconnected interior spaces of the stabilizing tube 18, the reducing piece 10, the receiving chamber 5, the reducing piece 9, and the deflecting piece 15 can be pressurized with compressed air. The first compressed air connection 32 is thus a pressurizing means by which an overpressure of, in particular, 0.3 to 0.5 bar can be set. As explained below, this overpressure can also be understood as the blow-off pressure.The unit consisting of the stabilizing hose 18, the two reducing pieces 9, 10, the receiving chamber 5, and the deflecting piece 15, including the combined arrangement of lining hose 4 and airtight separating film hose 23, which is folded over and fixed at the discharge nozzle 16, is designed to be particularly pressure-tight, so that when pressurized with compressed air via the first compressed air connection 32, this unit tends to increase its internal volume. This occurs because the combined unit of lining hose 4 and separating film hose 23 expands into the duct branch line 3. In doing so, the arrangement of lining hose 4 and separating film hose 23 turns itself inside out. The lining hose 4, which is located inside the receiving chamber 5 within the separating film hose 23 when stored, comes to the outside of the duct branch line 3 when inverted.The lining hose 4 is positioned against an inner wall of the sewer branch pipe 3, whereas the separating foil hose 23 is arranged on the inside of the lining hose 4 and thus facing away from the inner wall of the sewer branch pipe 3. The start of the insertion of the lining hose 4 into the sewer branch pipe 3, which can also be understood as blowing it in or out, is indicated in Fig. 1 by the dashed lines. The end cap 31 also has a second compressed air connection 33, which is connected to the compressed air supply hose 28 on the inside of the cap. The second compressed air connection 33 serves to pressurize the sealing bladder 26 connected to the compressed air supply hose 28. Furthermore, an electrical connection 34 is provided on the end cap 31, which is connected to the electrical supply line 30 on the inside of the cap. The electrical energy required to operate the UV light-emitting diodes 29 is supplied via the electrical connection 34. Figure 7 shows the state when the lining hose 4 is fully inserted into the sewer branch line 3. The end of the separating foil hose 23 extends further into the sewer branch line 3 than the lining hose 4. This end of the separating foil hose 23 is sealed. Due to the lack of support from an inner sewer wall at this point, the separating foil hose 23 can burst at its sealed end under the influence of overpressure, although this is not guaranteed to occur. The sealing bladder 26, attached to the closed end of the separating foil tube 23, is pressurized by means of the compressed air supply hose 28 and the second compressed air connection 33. The sealing bladder 26 can be made of an elastic rubber material or an equally elastic silicone material. It expands under the influence of the pressurization, thus creating a seal at the end of the section of the sewer branch line 3 to be rehabilitated, regardless of whether the separating foil tube 23 has ruptured at its closed end or not. Due to the overpressure still being supplied via the first compressed air connection 32, the lining hose 4 is pressed against the inner wall of the sewer branch line 3 to be rehabilitated by the separating foil hose 23, which is intact at least within the sewer branch line 3. The inflated sealing bladder 26 ensures a sufficiently pressure-tight interior for this purpose, extending from the end cap 31 on the stabilizing hose to the sealing bladder 26. To cure the lining tube 4 impregnated with the curing agent, the UV LEDs 29 are powered via the electrical connection 34 and the electrical supply line 30. Since the lighting element 27 is approximately the same length as the lining tube 4, the curing of the lining tube 4 advantageously takes place simultaneously along its entire length in a single operation. After an illumination period of approximately 30 to 60 minutes, the curing process is complete. The lining tube 4 then forms an intact, watertight inner coating for the sewer branch line 3, which is thus repaired and fully functional again. After pressure relief via the two compressed air connections 32 and 33, the sealing bladder 26, the lighting element 27, and the separating membrane hose 23 can be pulled out of the rehabilitated sewer branch line 3. After releasing the fixing of the lining hose 4 and the separating membrane hose 23 at the blow-out nozzle 16, the lining device 1 can also be pulled out of the main sewer pipe 2. Advantageously, after completion of the rehabilitation, it is not necessary to mill out a hardened sealing plug using a milling robot to make the sewer branch line 3 permeable to water again, as is required with some existing lining devices and / or methods. Alternative configurations are also conceivable, in which, for example, no lighting element 27 is provided. The curing of the lining hose 4 impregnated with the curing agent then takes place, for example, thermally via the ambient temperature. For this purpose, the lining hose 4 can be cooled during its storage in the receiving chamber 5 until it is blown into the sewer branch line 3 to be rehabilitated, for example, by cooling water that flows around the receiving chamber 5. The curing reaction of the curing agent, which is primarily thermally induced, preferably only begins once the lining hose 4 has left the cooled area. An alternative design is also conceivable in which no sealing bladder 26 is used. In this case, the intact, sealed end of the airtight separating foil tube 23 ensures that a sufficiently pressure-tight interior is present to press the lining tube 4 against the inner wall of the sewer branch line 3 to be rehabilitated. In any case, a defective sewer branch line 3 can be repaired very easily and efficiently using the lining device 1 and its alternative designs. In particular, no complex equipment, such as robots, is required for the repair.

Claims

Lining device for lining a branch line (3) branching off from a main channel (2) with a lining hose (4), comprising at least a) a receiving chamber (5) for receiving the lining hose (4), wherein the receiving chamber (5) has a cylindrical geometry with an axis of rotation (6) and a cylindrical receiving chamber outer circumferential surface (7), and the cylindrical receiving chamber outer circumferential surface (7) has a straight receiving chamber support line (8) that is parallel to the axis of rotation (6), b) at least a first reducing element (9) that is attached to a first axial end face of the receiving chamber (5), and has a truncated cone geometry with a reducing element outer circumferential surface (11) in the form of an oblique truncated cone, wherein a contour line of this oblique truncated cone lies on the reducing element outer circumferential surface (11) and forms a straight first reducing element support line (13),which is aligned with the receiving chamber support line (8), c) a deflecting piece (15) which is attached to an axial side of the first reducing piece (9) facing away from the receiving chamber (5), and which is provided at an end facing away from the first reducing piece (9) with a blow-out nozzle (16) for attaching one end of the lining hose (4), wherein the connection between the first reducing piece (9) and the deflecting piece (15) is designed such that the position of the blow-out nozzle (16) is adjustable and adaptable to the position of an inlet of the channel branch line (3) into the main channel (2), d) a pressurizing means (32) for pressurizing the pressure-tight design and the receiving chamber (5),a unit formed by at least the first reducing piece (9) and the deflecting piece (15) with a blow-out pressure for blowing out a lining hose (4) located in the receiving chamber (5) and attached to the blow-out nozzle (16) from the blow-out nozzle (16), ande) a second reducing piece (10) which is attached to a second axial end face of the receiving chamber (5) facing away from the first reducing piece (9), and which also has a truncated cone geometry with a reducing piece outer circumferential surface (12) in the form of an oblique truncated cone, wherein a contour line of this oblique truncated cone lies on the reducing piece outer circumferential surface (12) and forms a straight second reducing piece support line (14) which is aligned with the receiving chamber support line (8),f) wherein the second reducing piece (10) is connected on a side facing away from the receiving chamber (5) to a stabilizing element (18),which forms a continuation of the second reducing piece support line (14). Lining device according to claim 1, characterized in that the blow-out nozzle (16) is located in any adjustable position within a fictitious cylindrical space (17) formed by an imaginary axial extension of the cylindrical receiving chamber outer circumferential surface (7). Lining device according to claim 1 or 2, characterized in that at least one fastening means (21) for fastening a pull rope (19) is provided. Lining device according to one of the preceding claims, characterized in that the stabilizing element (18) is hollow. Lining device according to one of the preceding claims, characterized in that the stabilizing element (18) is flexible. Lining device according to one of the preceding claims, characterized in that the lining hose (4) in the state housed in the receiving chamber (5) is surrounded over its entire lining hose length by an airtight separating film hose (23), which is also attached to the blow-out nozzle (16) with its first hose end. Lining device according to claim 6, characterized in that the separating film tube (23) is connected at its second tube end facing away from the blow-out nozzle (16) to an inflatable sealing bladder (26). Lining device according to claim 6 or 7, characterized in that the separating film tube (23) is closed at its second tube end facing away from the blow-out nozzle (16). Lining device according to one of the preceding claims, characterized in that the lining hose (4) is connected at one hose end to a lighting element (27). Lining device according to claim 9, characterized in that the lighting element (27) has an elongated support element on which a plurality of light-emitting diodes (29) are attached. Lining device according to claim 10, characterized in that the light-emitting diodes are UV cold light-emitting diodes (29) which produce a maximum temperature of 50 °C.

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