Device for applying a hose liner

Abstract

Device (10) for applying a pipe liner (20) from a main channel (2) into a secondary channel (3), in particular a drainage channel, branching off from the main channel (2), comprising a container arrangement (100) extending along an axial direction (x) and a transverse direction (r) perpendicular to the axial direction (x), the container arrangement having a container element (110) for receiving the pipe liner (20) and a nozzle (120) arranged at an axial end of the container element (110), the nozzle (120) having an outlet opening (124) extending in the transverse direction (r) for discharging the pipe liner (20) received in the container element (110) and a fastening area (122) for fastening a first end region (22) of the pipe liner (20), such that the pipe liner (20), which is closed in a second end region (26), is inflated when the container arrangement (100) is pressurized The transverse direction (r) is output.

Description

[0001] The present invention relates to a device for applying, from a main channel, a pipe liner into a secondary channel branching off from the main channel, in particular a drainage channel, a channel rehabilitation system comprising such a device and a corresponding use and a corresponding method.

[0002] When renovating underground drainage channels, the problem of ensuring suitable access to the channel for carrying out the renovation work regularly arises. This is particularly the case with branch channels such as house connection channels, which are typically privately owned in the part connected to the house and municipally owned in the part connected to a main channel. If access to the branch channel is only possible in one of these sections, but only the other section is to be renovated, this often proves problematic. Therefore, especially when renovation work is to be carried out by the municipality, access from municipal territory, and thus usually from the main channel, is desirable.

[0003] To improve flow conditions, a service sewer does not usually flow vertically into a main sewer, but rather at an angle in the direction of flow of the main sewer, so that the service sewer forms an acute angle with the main sewer against the direction of flow of the main sewer and an obtuse angle in the direction of flow of the main sewer. Due to the limited space in the main sewer in the area where the branch sewer joins, rehabilitation of the service sewer can usually only be carried out via the obtuse angle. This means that suitable access for rehabilitation can only be achieved via the main sewer against the direction of flow of the main sewer. This dependence on the direction of flow, however, significantly limits the access options when renovating a service sewer starting from a main sewer.

[0004] An object of the present invention is therefore to provide, against the background of the above-mentioned problems, an improved device which in particular enables a flow direction-independent and thus simplified and more efficient rehabilitation of sewers, especially house connection sewers.

[0005] The inventive solution lies in the features of the independent claims. Advantageous further developments are the subject of the dependent claims.

[0006] According to the invention, a device for applying a pipe liner from a main channel into a secondary channel leading from the main channel, in particular a drainage channel, is disclosed, comprising a container arrangement extending along an axial direction and a transverse direction running perpendicular to the axial direction, which container arrangement has a container element for receiving the pipe liner and a nozzle arranged at an axial end of the container element, wherein the nozzle has an outlet opening pointing in the transverse direction for dispensing the pipe liner received in the container element and a fastening region for fastening a first end region of the pipe liner, so that the pipe liner closed in a second end region is dispensed in the transverse direction when pressure is applied to the container arrangement.

[0007] The device according to the invention is, for example, a pipe lining device for applying a pipe liner into a house connection channel leading from a main channel, independent of the flow direction, from the main channel.

[0008] Some terms used in connection with the invention are explained below: The application of the pipe liner is understood to mean the, in particular inverted, dispensing and subsequent curing of the pipe liner in the secondary channel.

[0009] In this context, a sewer is defined as a drainage sewer, particularly a wastewater sewer. A main sewer is understood, for example, to be a sewer of a local sewer system into which several secondary sewers, such as service sewers, flow for the wastewater drainage of houses. In particular, such sewers typically have a defined flow direction. A main sewer typically has a diameter in the range of 20 cm (DN 200) to 30 cm (DN 300). For a secondary sewer, diameters in the range of 10 cm (DN 100) to 15 cm (DN 150) are common.

[0010] The container arrangement extends along its length in an axial direction and perpendicular to the axial direction in a transverse direction. With the exception of the outlet opening of the nozzle, the container arrangement provides a substantially closed interior space, wherein the pipe liner can be accommodated in one or more container elements of the container arrangement. The container arrangement can be modular in design and, for example, comprise a plurality of, for example two or three, container elements. Thus, it is conceivable that the container arrangement, for example in the case of a particularly long pipe liner to be dispensed, comprises container elements arranged adjacent to one another in pairs, in each of which a part of the pipe liner is accommodated, wherein the container elements have a common interior space. The nozzle can be arranged on one of the plurality of container elements.Preferably, the container arrangement comprises a device for detecting an internal pressure in the container arrangement.

[0011] The container element is designed to accommodate the pipe liner, for example, a folded or rolled pipe liner. To ensure the most even discharge of the pipe liner when the container assembly is pressurized, the inner wall of the container element can be designed to be low-friction, edgeless, and / or stepless. For example, the container element is a plastic pipe or a metal pipe.

[0012] The nozzle can be formed as part of the container element, but can in particular also be designed as a separate component of the container arrangement which is fastened to a suitable opening in the container element. In the latter case, the nozzle can be made of the same material as the container element. For example, the nozzle is funnel-shaped, with the outlet of the funnel neck forming the outlet opening. Accordingly, in a separate design of such a nozzle, the funnel opening can be fastened to an opening in the container element, with the funnel opening and opening of the container element being able to fit together precisely. For example, the nozzle is a funnel-shaped pipe nozzle whose funnel opening is fastened to an open end face of a container element designed as a cylindrical tube. The nozzle comprises a transversely facing outlet opening.Accordingly, the nozzle can be designed as a 90° pipe bend.

[0013] For example, the outlet opening is round. To enable the most targeted discharge of the pipe liner, the outlet opening can have a smaller cross-section than the cross-section of the inside of the container element in the transverse direction. For example, the diameter of a round outlet opening is at least 70 mm, preferably at least 85 mm, and at most 100 mm, preferably at most 95 mm.

[0014] The wall surrounding the outlet opening can be designed as the fastening area of ​​the nozzle. For example, the fastening area of ​​the nozzle has a length of at least 20 mm, preferably at least 60 mm, and a maximum of 120 mm, preferably a maximum of 80 mm, starting from the outlet opening. Furthermore, it can be provided that the wall of the nozzle, in the fastening area directly at the outlet opening, has a thickened portion projecting outward from the outlet opening to enable the first end region of the pipe liner to be fastened in the fastening area with the greatest possible slip resistance.

[0015] The pipe liner is a tubular material that, once applied, forms the inner wall of the rehabilitated secondary sewer. For example, the pipe liner comprises one or more curable liner materials, such as thermosetting synthetic resins, for example, unsaturated polyester resins, epoxy resins, silicate resins, or vinyl ester resins, which, for example, meet the standards DIN 18820-1 Table 1 and / or DIN 16946-2. The pipe liner is preferably designed in multiple layers. The pipe liner can comprise a liner layer as an inner layer and a support layer as an outer layer. For example, the layers of the pipe liner are loosely arranged one above the other and movable relative to one another. The liner layer is formed, for example, as a resin matrix and a carrier fiber.The support layer comprises, for example, reinforcing fibers and / or foils, and can preferably be designed as a support tube or a calibration tube. After the pipe lining tube has been applied, the now outer liner layer of the inverted pipe liner can form the inner wall of the secondary channel. The support layer of the inverted pipe liner, which is now inner after application, can be removed. The pipe liner is preferably customized for the secondary channel to be rehabilitated, for example, with regard to length, diameter, and wall thickness.

[0016] One end of the hose liner can be fastened to the fastening area of ​​the nozzle. For this purpose, a first end area of ​​a hose liner accommodated in the container element of the container arrangement can be guided through the outlet opening, turned inside out, pulled over the wall of the outlet opening and fastened to the outside of the nozzle, for example with an outlet fastening element, such as a suitable outlet sleeve. If the hose liner is closed at the other end in a second end area, the hose liner represents a closure of the outlet opening so that when pressure is applied to the otherwise closed container arrangement, the hose liner accommodated in the container element is dispensed from the outlet opening and expands according to its hose shape. The hose liner is thus inverted so that after it has been dispensed from the device, the inside of the hose liner is on the outside and the outside of the hose liner is on the inside.During dispensing, the pipe liner can adapt its course to the course of the branch channel into which it is being dispensed. By subjecting the container assembly to hot steam after the pipe liner has been dispensed, the hot steam can reach the pipe liner dispensed into the branch channel to be rehabilitated, thus causing the pipe liner to harden without requiring direct access to or manipulation of the inverted pipe liner. The device thus enables particularly simple and rapid application of the pipe liner, which can also be performed without extensive operating personnel.

[0017] The nozzle comprises an outlet opening pointing in the transverse direction so that the pipe liner can be discharged from the outlet opening in the transverse direction. This allows application into a branch channel regardless of the direction in which it joins the main channel, so that application into the branch channel is possible from the main channel regardless of the direction of flow. This should be understood in particular to mean that the positioning and alignment of the device in a main channel having a specific flow direction can take place regardless of the flow direction, and the device can be moved through the main channel in particular in the direction of flow to carry out the application. Since the nozzle is arranged at an axial end of the container element, the device can be positioned and aligned particularly easily in the main channel so that the outlet opening of the nozzle points in the direction of the outgoing branch channel.

[0018] Using the device according to the invention, a pipe liner of a defined length can be applied to the branch sewer. This enables the precise rehabilitation of a branch sewer starting from its confluence with the main sewer, and in particular, when a municipally owned section of a branch sewer is being rehabilitated from a typically municipal main sewer, without having to consider the flow direction of the main sewer.

[0019] Due to the outlet opening of the nozzle arranged at one axial end of the container element pointing in the transverse direction, the device can also be positioned in vertically running shafts from which a branch channel to be rehabilitated, for example in access shafts of the branch channel, and operated from there, which makes the device particularly versatile.

[0020] In one embodiment, the container element is cylindrical, with the cylinder axis running in the axial direction, and the maximum extension of the container arrangement in the transverse direction preferably corresponds to the outer diameter of the container element. For example, the outlet opening in the transverse direction is arranged no further than the maximum extension of the device in the transverse direction. However, it can also be provided that the arrangement of the outlet opening in the transverse direction depends on the diameter of the main channel in which the device is to be used, for example by using a correspondingly shaped nozzle. Accordingly, the maximum extension of the device in the transverse direction can also be predetermined by the extension of the nozzle in the transverse direction.

[0021] In this way, the external shape of the device is adapted to a main duct, which typically has a round cross-section, so that the device can be used in a main duct with particularly efficient use of the available space.

[0022] It can be provided that the maximum extension of the container arrangement in the transverse direction is a maximum of 30 cm, preferably a maximum of 25 cm, more preferably a maximum of 20 cm.

[0023] The device can advantageously be designed such that it has such a particularly small extension in the transverse direction. This makes it possible to provide a device that is suitable for applying the pipe liner even from particularly narrow main channels that have a correspondingly small diameter.

[0024] According to a further embodiment, the container assembly comprises a cover element arranged on the container element and having one or more connections for introducing compressed air and / or superheated steam into the container assembly. For example, the cover element is arranged at an end of the container element spaced axially from the nozzle. Superheated steam is understood to mean steam having a temperature of at least 40°C, preferably at least 60°C, more preferably at least 80°C. In particular, it can be water vapor.

[0025] The inclusion of such a cover element enables, particularly with a standard-compliant design of the connections, which are designed, for example, as a hexagon connection or as part of a claw coupling or a hose coupling, a particularly easy-to-use and versatile option for pressurizing the container arrangement and, on the other hand, for causing the dispensed hose liner to harden by applying superheated steam. In particular, it can be provided that an inlet of a superheated steam line of the device is connected to a corresponding connection of the cover element on the inside of the cover element, so that superheated steam is introduced into the container arrangement by introducing superheated steam into the superheated steam line.Alternatively or additionally, a connection can be provided on the outside of the cover element for coupling to a guide rod, through which compressed air can be introduced into the container assembly. Such a guide rod can be rigid, allowing positioning and alignment of the container assembly to be performed using the guide rod. The cover element can be made of the same material as the container element.

[0026] One or more components of the container assembly, in particular the lid element and the nozzle, can further comprise at least one liquid passage, which is preferably selectively closable. For example, the liquid passage has the form of one or more holes. Additionally or alternatively, it can be provided that the container element or the nozzle has one or more such liquid passages, for example, spaced apart from one another in the axial direction by at least the axial extent of the container element.

[0027] By means of such a liquid passage, any liquid, for example water, that forms within the container arrangement during application, in particular as a result of exposure to hot steam, can escape from the container arrangement. If the liquid passage is optionally closable, it can be closed during pressurization of the container arrangement depending on the effect of the pressurization. If several liquid passages are provided spaced apart from one another in the axial direction, these can be used individually, in particular depending on the positioning of the device relative to the flow direction of the main channel. This allows a particularly efficient passage of liquids when the device is used with or against the flow direction of the main channel from which the application takes place. For example, several liquid passages can each be individually and optionally closed.For example, it may be provided that at least one fluid passage is always open.

[0028] Preferably, the container arrangement comprises a lay-out internal hot steam line, the inlet of which can be attached to a suitable connection of the container arrangement, in particular to a connection for introducing hot steam of a cover element, and the outlet of which can be connected to the second end region of the pipe liner, so that the hot steam line can be laid out inside the pipe liner along the length of the pipe liner to be dispensed when the pipe liner is dispensed, and when the container arrangement is subjected to hot steam, hot steam can be dispensed from the second end region of the dispensed pipe liner.

[0029] The hot steam line can be flexible, for example as a correspondingly designed hose. For example, it is also accommodated in the container element, for example folded or rolled up. The hot steam line can be configured and operatively connected to the pipe liner to be dispensed in such a way that hot steam can only be passed through the hot steam line after the pipe liner has been completely dispensed. The outlet of the hot steam line can be connected to the second end region, for example by means of a cable, so that when the container arrangement is subjected to hot steam, the steam exits the hot steam line in the region of the second end region. Furthermore, the hot steam line can be laid out internally in the pipe liner along the length of the pipe liner to be dispensed when the pipe liner is dispensed.The hot steam line can have a length that depends on the length of the pipe liner to be dispensed, for example such that when the pipe liner is completely dispensed, the hot steam line is also completely extended. For example, the hot steam line has a length that corresponds to the sum of the length of the pipe liner to be dispensed and the length of the container arrangement in the axial direction. The hot steam line can be configured to allow the passage of hot steam only when it is fully extended. The hot steam line can have one or more perforations at least along part of its length, so that at least part of the hot steam guided through the hot steam line can escape.

[0030] Using such a hot steam line, particularly uniform curing of the dispensed pipe liner can be achieved by applying hot steam to the container assembly. Furthermore, insufficient curing of the dispensed pipe liner in areas remote from the outlet opening, particularly in areas adjacent to the second end, can be avoided.

[0031] Additionally, the device can comprise a device for detecting an internal pressure and / or a temperature of the hot steam line. Such a device is preferably designed as a correspondingly configured combined pressure gauge and thermometer or as a connection for connecting a device, positioned separately from the container assembly, for example, designed to detect the internal pressure and / or the temperature of the hot steam line, such as a mixing box arranged outside the main channel. For example, a connection of a lid element of the container assembly designed to introduce hot steam can be designed as such a connection.

[0032] By means of such a device, it can be checked, for example by detecting the internal pressure of the hot steam line, whether the pipe liner to be dispensed has been fully dispensed. In particular, a drop in the pressure applied to the hot steam line can indicate that the hot steam line has been fully dispensed. Before the dispensing is complete, fluid communication between the inlet and outlet of the hot steam line cannot take place, in particular because the hot steam line within the container arrangement is blocked by self-inflicted line obstructions, for example line kinks. Pressurization of the hot steam line in this state can accordingly be detected by the device. Once the hot steam line has been fully dispensed, fluid communication can take place between the inlet and outlet, in particular because it no longer has any line obstructions.In this state, pressurization can only be detected to a limited extent by the device. If the hot steam line is continuously pressurized during the dispensing of the pipe liner, a drop in the pressure applied to the hot steam line can be detected, which can indicate the complete laying of the hot steam line and, accordingly, the complete dispensing of the pipe liner. If the device is also designed to detect a temperature of the hot steam line, the hot steam temperature can also be monitored, for example when the container arrangement is pressurized with hot steam. This can ensure that the hot steam is at a temperature suitable for curing and, for example, exceeds a minimum temperature and / or does not exceed a maximum temperature.

[0033] In one embodiment, the container arrangement comprises a first and / or a second fastening element, wherein the nozzle can be fastened to a first fastening region of the container element by means of the first fastening element and / or wherein the cover element can be fastened to a second fastening region of the container element by means of the second fastening element. For example, the fastening elements can be designed as sleeves. The fastening by means of a fastening element to a fastening region can be designed to be gas-tight. In addition, the fastening elements can have one or more fixing plates for securing the interconnected components of the container arrangement against a rotational relative movement, for example about the axial axis of the container arrangement, and / or for securing against a tilting movement of the components relative to one another.For example, the extension of the container element in the transverse direction may be smaller in the fastening areas than outside, so that even when the fastening elements are implemented, the maximum extension of the container arrangement in the transverse direction is determined by the outer diameter of the container element.

[0034] By taking into account appropriately designed fastening elements and fastening areas of the container element, the components of the container arrangement can be assembled and the container arrangement can be made modular in a particularly simple manner.

[0035] Furthermore, the invention discloses a sewer rehabilitation system comprising a device according to the invention and a pipe liner that can be accommodated in a container element of the device, wherein a first end region of the pipe liner can be fastened to a fastening region of the nozzle by means of an outlet fastening element. For example, a first end region of the pipe liner can be guided through the outlet opening, folded over, slipped over the wall of the outlet opening, and fastened to the outside of the nozzle, for example with the outlet fastening element, for example a suitable outlet sleeve.

[0036] If the nozzle has an outwardly projecting thickening at the outlet opening, for example, directly at the outlet opening, the first end portion of the pipe liner can be attached using the outlet fastening element not directly at the outlet opening, but rather behind this thickening, and thus at a transverse distance from the outlet opening. This allows for a particularly slip-resistant attachment of the pipe liner to the device.

[0037] The sewer rehabilitation system may also comprise further components, for example arranged outside the device, for example means for pressurizing the container arrangement and / or means for supplying the container arrangement with hot steam, such as a compressor and / or a suitable mixing box.

[0038] For example, the pipe liner has an inner liner layer and an outer support layer. The support layer can be designed as a support tube and / or the liner layer can be designed as a curable liner material or comprise a curable liner material. Accordingly, the inverted pipe liner, once dispensed, has a reversed layer sequence: in the inverted pipe liner, the liner layer is then arranged on the outside and the support layer on the inside. Similarly, when one end of the pipe liner is turned inside out, for example, over the wall of the outlet opening to secure the pipe liner to the outside of the nozzle, the layer sequence in the turned-over part is reversed.

[0039] The pipe liner can be designed without a liner layer in at least a portion of the first end region, so that it has only the support layer directly at the end of the pipe liner. This means that even after this end has been turned inside out, the support layer continues to be arranged on the outside of the pipe liner. For example, the liner-free portion of the first end region extends along the length of the pipe liner by at least the extent of the outlet fastening element in this direction.

[0040] Preferably, only the support layer can be attached to the device using the outlet fastening element. This allows for a particularly reliable attachment of the pipe liner to the device, without having to take into account any material changes that may occur after application. Furthermore, this reduces the amount of inner layer material waste.

[0041] Additionally, a hose cuff can be provided for encasing and securing the support layer in an area of ​​the hose liner adjacent to the first end area, for example, directly adjacent to it. The hose cuff preferably extends at least 4 cm, preferably at least 5 cm, and no more than 8 cm, preferably no more than 6 cm, along the length of the hose liner.

[0042] Due to local pressure increases, the support layer may expand in an area immediately adjacent to the outlet opening before the pipe liner is fully dispensed, resulting in an increase in its inner diameter. A hose collar can be used to fix the support layer in the direction of the pipe liner's diameter. This preserves the diameter of the support layer during dispensing and effectively prevents such expansion, which could lead to the liner slipping in the dispensing direction and thus to uncontrolled dispensing.

[0043] The hose cuff can be designed to break under a predetermined pressure exerted on the hose cuff by the support layer. For example, the hose cuff can have a suitable predetermined breaking point for this purpose. Alternatively or additionally, the hose cuff can be designed to expand when heated to temperatures exceeding 40°C, particularly when exposed to superheated steam.

[0044] In this way, the effect of the hose cuff can be maintained only until the hose liner is completely dispensed. If the hose liner is to be expanded as evenly as possible along the length of the dispensed hose liner when exposed to hot steam, such a planned expansion can also occur in the area encompassed by the hose cuff. If the hose cuff is designed to expand when exposed to hot steam, it can be ensured that the described planned expansion of the area encompassed by the hose cuff is achieved when the hot steam is applied.

[0045] Preferably, a tension element connected to the second end region of the pipe liner is included, wherein the cover element has at least one opening for the passage of the tension element. For example, the tension element is connected only to a support layer of the pipe liner.

[0046] Due to the attachment to the second end area, the tension element is laid out inside the pipe liner along the length of the pipe liner during dispensing. After the pipe liner has been applied, material residues from the branch channel to be rehabilitated can be retracted into the container arrangement and removed from the branch channel. If the pipe liner is designed with a support layer and liner layer, the support layer can be retracted into the container arrangement after the liner material has cured. The retraction of the tension element can be achieved particularly effectively through the through-opening of the cover element. To reduce the influence of such a through-opening on the pressurization of the container arrangement, the through-opening can have an appropriate seal, for example a rubber seal.

[0047] In a further embodiment, the sewer rehabilitation system may include a chassis for positioning the device within a main sewer. For example, such a chassis is designed as a trolley on which the device can be placed.

[0048] In this way, the positioning of the sewer rehabilitation system within a main sewer can be simplified. The wheel spacing of such a carriage can be variable; alternatively or additionally, the axles of such a carriage can each be variable in length. In this way, the sewer rehabilitation system can be positioned particularly easily in main sewers with different diameters. In particular, it can be provided that the extension of the sewer rehabilitation system, including the chassis, in the transverse direction does not exceed a maximum value of 60 cm, preferably 40 cm, more preferably 30 cm. This enables particularly versatile use of the sewer rehabilitation system.

[0049] According to the invention, a use of a device according to the invention or a sewer rehabilitation system according to the invention for the rehabilitation, from a main sewer, of at least a part of a secondary sewer leading from the main sewer, in particular a drainage sewer, preferably a house connection sewer, is also disclosed.

[0050] According to the invention, a method for applying a pipe liner into a secondary channel, in particular a drainage channel, is further disclosed, comprising: - receiving a pipe liner in a container element of a container arrangement which extends along an axial direction and a transverse direction perpendicular to the axial direction; - Attaching a first end portion of the hose liner to a nozzle of the container assembly, which nozzle is arranged at an axial end of the container element and has a transversely directed outlet opening for dispensing the hose liner from the container element, wherein the first end portion is guided through an outlet opening of the nozzle and is slipped over the wall of the outlet opening; - Positioning and aligning the container assembly in a main channel from which the branch channel branches off, to discharge the pipe liner from the outlet opening into the branch channel; - Discharge of the pipe liner from the outlet opening into the secondary channel, preferably by applying compressed air to the container arrangement; and - Curing of the dispensed pipe liner, preferably by applying hot steam to the container assembly.

[0051] For a more detailed explanation of further advantageous developments of the method, reference is made to the above-described developments of the device and the sewer rehabilitation system

[0052] The embodiments and configurations described above are to be understood as examples only and are not intended to limit the present invention in any way.

[0053] The invention will be explained in more detail below with reference to advantageous embodiments and examples in the accompanying drawings. They show: Fig. 1 a schematic representation of an embodiment of an inventive use of a device according to the invention; Fig. 2 a schematic representation of an embodiment of a device according to the invention; Fig. 3 a schematic representation of an embodiment of a sewer rehabilitation system according to the invention; and Fig. 4 a schematic detailed representation of the sewer rehabilitation system of the Fig. 3; and Fig. 5 a schematic flow diagram of an embodiment of a method according to the invention.

[0054] The figures show exemplary embodiments of the invention. Like reference numerals refer to like or similar elements of the illustrated exemplary embodiments.

[0055] In Fig. 1 is a schematic representation of an embodiment of an inventive use of a device 10 according to the invention for rehabilitating part of a branch channel 3 leading from a main channel 2. The main channel 2 is shown by way of example as a municipal wastewater channel of a local sewer system that runs beneath a street 4. The flow direction of the main channel 2 is indicated by an arrow. The main channel 2 has a diameter of 30 cm. The branch channel 3 is a drainage channel in the form of a service connection channel for a house 6 located on the street 4 and has a diameter of 15 cm. Further branch channels 3' leading from the main channel 2 and designed as service connections for houses 6' are also shown.

[0056] The branch canals 3, 3' are each sloped in the direction of flow of the main canal, so that they form an obtuse angle α with the main canal in the direction of flow and an acute angle β against the flow. The branch canals 3, 3' each have a privately owned part connected to a house 6, 6' and a communal part connected to the main canal 2. The boundary of these two parts is in Fig. 1 is symbolized by a dotted dividing line 5. In the example shown, the rehabilitation of the branch channel 3 is carried out only in the part under municipal ownership.

[0057] The device 10 is configured to apply a pipe liner 20 from the main channel 2 into the secondary channel 3 branching off the main channel. The device 10 is positioned in the main channel 2 in the flow direction of the main channel 2 and oriented such that a pipe liner 20 received in the device 10 and attached to the device 10 can be dispensed from the main channel 2 into the secondary channel 3 and cured.

[0058] Fig. 2 shows a schematic representation of an embodiment of a device 10 according to the invention, which is designed to apply a pipe liner 20 from a main channel 2 into a secondary channel 3 leading from the main channel 2.

[0059] The device 10 comprises a container assembly 100 extending along an axial direction x and a transverse direction r, perpendicular to the axial direction x. The container assembly 100 has a container element 110, a nozzle 120, a lid element 140, a hot steam line 130, and a first fastening element 150 and a second fastening element 160. The nozzle 120 is formed as a separate component of the container assembly 100 and is arranged at an axial end of the container element 110. The maximum extension of the container assembly 100 in the transverse direction r is 18 cm.

[0060] The container element 110 is a cylindrical plastic pipe into which the hose liner 20 can be accommodated. The cylinder axis of the container element 110 extends in the axial direction x, and the outer diameter of the container element 110 corresponds to the maximum extension of the container assembly 100 in the transverse direction r. The inner wall of the container element 110 is designed to be low-friction and to be edgeless and stepless.

[0061] The funnel-shaped nozzle 120 comprises an outlet opening 124 formed by the outlet of the funnel neck and pointing in the transverse direction r, which is designed to discharge the hose liner 20 accommodated in the container element 110 in the transverse direction r. Accordingly, the discharge direction and the axial direction x form an angle of 90°. The funnel opening of the nozzle 120 is attached to an opening in the container element 110. In the present example, the nozzle 120 is a pipe nozzle made of the same material as the container element 110.

[0062] The nozzle 120 has a fastening region 122 for fastening a first end region 22 of the hose liner 20, so that the hose liner 20 closed in a second end region 26 is dispensed when the container arrangement 100 is pressurised (cf. Fig. 2). The fastening area 122 is formed by the wall of the nozzle 120 surrounding the outlet opening 124 and extends over a length in the radial direction r of 70 mm. In the fastening area 122, the wall of the nozzle 120 has a thickened portion projecting outward, in the example shown, in the axial direction x.

[0063] The outlet opening 124 is round and has a smaller cross-section than the cross-section of the inside of the container element 110 in the transverse direction. The diameter of the outlet opening 124 is 80 mm.

[0064] The cover element 140 is arranged at an end of the container element 110 spaced apart from the nozzle 120 in the axial direction x and has connections 142 for introducing compressed air and superheated steam into the container assembly 100. A guide rod for introducing compressed air and / or a supply line from a mixing box for supplying the container assembly 100 with superheated steam can be connected to the connections 142. The cover element 140, like the container element 110, is molded from plastic.

[0065] A fluid passage 144 in the form of a hole in the wall is provided on both the nozzle 120 and the lid element 140 to allow any fluids formed during application to escape from the container assembly 100. The fluid passages 144 are thus spaced apart from each other in the axial direction x by more than the axial extent of the container element 110. Both fluid passages 144 can be individually closed as desired.

[0066] On the inside of the cover element 140, the flexible hot steam line 130 is connected to the connection 142 for introducing hot steam, which line is located inside the container assembly 100 and is accommodated in the container element 110. The hot steam line 130 is a hose whose inlet is attached to the connection 142 and whose outlet can be connected to the second end region 26 of the hose liner 20, so that when the hose liner 20 is dispensed, the hot steam line 130 can be laid out inside the hose liner 20 along the length of the hose liner 20 to be dispensed, and when the container assembly 100 is pressurized with hot steam, the hot steam can be dispensed from the second end region 26 of the dispensed hose liner 20 (cf. Fig. 2).

[0067] A device 132 for detecting an internal pressure and a temperature of the hot steam line 130 in the form of a combined pressure gauge and thermometer is arranged on the cover element 140.

[0068] For illustrative purposes, the components of the container assembly 100 are shown unattached to one another, but should be understood as being attached to one another as described below.

[0069] The nozzle 120 is fastened to a first fastening region 112 of the container element 110 by means of the first fastening element 150. The lid element 140 is fastened to a second fastening region 114 of the container element 110 by means of the second fastening element 160. Flanges are arranged on the fastening regions 112 and 114 and the corresponding fastening regions of the nozzle 120 and the lid element 140, which are connected to one another by means of the fastening elements 150 and 160. The fastening elements 150 and 160 are designed as sleeves, each of which fastens two flanges to one another. In the fastening areas 112 and 114, the extension of the container element 110 in the transverse direction is reduced in each case, so that the fastening elements 150 and 160 arranged there, in their maximum extension in the transverse direction, do not exceed the outer diameter of the container element 110 of 18 cm. Fig. 3 is a schematic representation of an embodiment of a sewer rehabilitation system 1 according to the invention, which comprises a device 10 as described above in connection with Fig. 2 and comprises a pipe liner 20.

[0070] In contrast to the device 10 of Fig. 2, the container arrangement 100 of the Fig. The device 10 shown in Figure 3 has an additional container element 111, which is designed similarly to the container element 110 and, in particular, has fastening areas analogous to the first and second fastening areas 112, 114. By means of a fastening element 161, the additional container element 111 is fastened to the second fastening area 114 of the container element 110, wherein the container elements 110 and 111 form a common interior space for receiving the hose liner 20 and the folded hot steam line 130 connected to the second end area 26 of the hose liner 20. The cover element 140 is fastened to the additional container element 111 by means of the second fastening element 160.

[0071] The hose liner 20 is received in the container element 110, and a first end region 22 of the hose liner 20 is guided through the outlet opening 124, folded over, slipped over the wall of the outlet opening 124, and fastened to the fastening region 122 by means of an outlet fastening element 24 designed as a sleeve. In particular, only one support layer 210 of the hose liner 20 is fastened to the fastening region 122 by means of the outlet fastening element 24 (cf. Fig. 4).

[0072] Furthermore, the sewer rehabilitation system 1 comprises a chassis 170 for positioning the device 10 within the main sewer 2. The chassis 170 is designed as a carriage on which the device 10 is arranged. The wheel spacing and the length of the axles of the chassis 170 are adjustable.

[0073] The length of the hot steam line 130 is designed such that when the pipe liner 20 is completely dispensed, the hot steam line 130 is also completely dispensed. For this purpose, the hot steam line 130 has a length that essentially corresponds to the sum of the length of the pipe liner 20 to be applied and the length of the container arrangement 100 in the axial direction x. A passage of hot steam through the hot steam line 130 is only possible when the hot steam line 130 is completely dispensed. Only then is the hot steam line 130 free of obstructions and when the container arrangement 100 is subjected to hot steam, the steam can pass through the hot steam line 130, wherein the hot steam is then dispensed starting from the second end region 26 of the dispensed pipe liner 20.

[0074] Fig. 4 shows a schematic detailed representation of the Fig. 3. In particular, it shows a part of the nozzle 120 comprising the fastening region 122 and the outlet opening 124 (hatched when in the foreground in the plan view), as well as the first end region 22 of the hose liner 20 received in the container element of the container arrangement, which first end region 22 passes through the outlet opening 124 and is turned inside out and pulled over the wall of the outlet opening 124 and is fastened to the fastening region 122 by means of the outlet fastening element 24. The fastening region 122 has a thickened portion directly at the outlet opening 124, projecting outwards in the axial direction x. The first end region 22 of the hose liner 20 is not attached directly to the outlet opening 124, but only behind this thickening, and thus spaced apart from the outlet opening 124 in the transverse direction r, to the attachment region 122 by means of the outlet attachment element 24.

[0075] The hose liner 20 has a support layer 210 (shown in a checkered background when in the foreground in the plan view) and a liner layer 220 (shown in dotted background when in the foreground in the plan view). The layers 210, 220 of the hose liner 20 are loosely arranged one above the other and movable relative to each other. The support layer 210 is designed as a support tube comprising reinforcing fibers and films, and the liner layer 220 is designed as a curable liner material comprising a resin matrix and a carrier fiber.

[0076] In the first end region 22, the hose liner 20 is designed without a liner layer, so that there it only has the support layer 210. Since the hose liner 20 is turned over the wall of the outlet opening 124 after being passed through the outlet opening 124, the layer sequence of the turned-over hose liner 20 4 is reversed, as can be seen in the left part of the figure - the liner layer 220 is in the foreground. Because the hose liner 20 is designed without a liner layer in the first end region 22, it does not have a liner layer 220 (which is actually on the outside as a result of the turning over), but only the support layer 210, so that the support layer 210 remains in the first end region 22 even after the turning over has taken place during the Fig. 4 is in the foreground of the top view shown.

[0077] In addition, a hose sleeve 230 is provided, which encloses and fixes the support layer 210 in an area of ​​the hose liner 20 adjacent to the first end region 22. Accordingly, the hose sleeve 230 is arranged between the two layers 210, 220, so that in the plan view of the Fig. 4 is also not in the foreground and is therefore shown in dash-dotted lines. The hose cuff 230 extends 5 cm along the length of the hose liner 20, in the example shown correspondingly in the transverse direction r. The hose cuff 230 is designed to expand when exposed to hot steam, thereby losing its securing effect. Furthermore, the hose cuff 230 has a predetermined breaking point 231, so that it breaks even if a specific pressure exerted by the hose liner 20 on the hose cuff 230 is exceeded, thus eliminating the securing effect.

[0078] In Fig. 5 shows a schematic flow diagram of an embodiment of a method 200 according to the invention for applying a pipe liner 20 into a secondary channel 3.

[0079] In a first step 101, a hose liner 20 is received in a container element 110, a container arrangement 100, which extends along an axial direction x and a transverse direction r perpendicular to the axial direction x.

[0080] In a further step 102, a first end portion 22 of the hose liner 20 is attached to a nozzle 120 of the container assembly 100. The nozzle 120 is arranged at an axial end of the container element 110 and has an outlet opening 124 pointing in the transverse direction r for dispensing the hose liner 20 from the container assembly 100. To be attached to the nozzle 120, the first end portion 22 is guided through the outlet opening 124 and slipped over the wall of the outlet opening 124.

[0081] The container arrangement 100 is then positioned and aligned 103 in a main channel 2, from which the secondary channel 3 branches off, in order to discharge the hose liner 20 from the outlet opening 124 into the secondary channel 3.

[0082] In step 104, the hose liner 20 is dispensed from the outlet opening 124 into the secondary channel 3 by applying compressed air to the container assembly 100. The dispensed hose liner 20 is cured in step 105 by applying hot steam to the container assembly 100.

[0083] The embodiments of the present invention described in this specification and the optional features and properties cited in relation thereto are also to be understood as disclosed in all combinations with one another. In particular, the description of a feature encompassed by an embodiment should not be understood in this case to imply that the feature is essential or essential to the function of the embodiment, unless explicitly stated otherwise.

Claims

[1] Device (10) for applying, from a main channel (2), a hose liner (20) into a secondary channel (3) leading from the main channel (2), in particular a drainage channel, comprising a container arrangement (100) extending along an axial direction (x) and a transverse direction (r) running perpendicular to the axial direction (x), which container arrangement has a container element (110) for receiving the hose liner (20) and a nozzle (120) arranged at an axial end of the container element (110), wherein the nozzle (120) has an outlet opening (124) pointing in the transverse direction (r) for dispensing the hose liner (20) received in the container element (110) and a fastening region (122) for fastening a first end region (22) of the hose liner (20), so that the hose liner (20) closed in a second end region (26) when the container arrangement is pressurized (100) in the transverse direction (r). [2] Device (10) according to claim 1, wherein the container element (110) is cylindrical, the cylinder axis extends in the axial direction (x) and preferably the maximum extension of the container arrangement (100) in the transverse direction (r) corresponds to the outer diameter of the container element (110). [3] Device (10) according to one of the preceding claims, wherein the maximum extension of the container arrangement (100) in the transverse direction (r) is a maximum of 30 cm, preferably a maximum of 25 cm, more preferably a maximum of 20 cm. [4] Device (10) according to one of the preceding claims, wherein the container arrangement (100) comprises a cover element (140) which is arranged on the container element (110) and which has one or more connections (142) for introducing compressed air and / or hot steam into the container arrangement (100), wherein the cover element (140) preferably has at least one liquid passage (144). [5] Device (10) according to one of the preceding claims, wherein the container arrangement (100) comprises an extendable internal, preferably flexible, hot steam line (130), the inlet of which can be attached to a suitable connection of the container arrangement (100), in particular to a connection (142) for introducing hot steam of a cover element (140), and the outlet of which can be connected to the second end region (26) of the pipe liner (20), so that the hot steam line (130) can be laid out along the length of the pipe liner (20) to be dispensed inside the pipe liner (20) when the pipe liner (20) is dispensed, and when the container arrangement (100) is subjected to hot steam, the hot steam can be dispensed from the second end region (26) of the dispensed pipe liner (20). [6] Device (10) according to claim 5, wherein the device (10) comprises a device (132) for detecting an internal pressure and / or a temperature of the hot steam line (130). [7] Device (10) according to one of the preceding claims, wherein the container arrangement (100) comprises a first fastening element (150) and / or a second fastening element (160), wherein the nozzle (120) can be fastened to a first fastening region (112) of the container element (110) by means of the first fastening element (150) and / or wherein the cover element (140) can be fastened to a second fastening region (114) of the container element (110) by means of the second fastening element (160). [8] Device (10) according to one of the preceding claims, characterized by a hose sleeve (230) for covering and fixing a support layer (210) of the hose liner (20) in an area adjacent to the first end area (22). [9] Hose cuff for encasing and fixing a support layer (210) of the hose liner (20) in an area adjacent to the first end area (22) for use with a device (10) according to one of the preceding claims. [10] Sewer rehabilitation system (1), comprising a device (10) according to one of the preceding claims and a pipe liner (20) which can be received in a container element (110) of the device (10), wherein a first end region (22) of the pipe liner (20) can be fastened to a fastening region (122) of the nozzle (120) by means of an outlet fastening element (24). [11] Sewer rehabilitation system (1) according to claim 10, wherein the pipe liner (20) has an inner liner layer (220) and an outer support layer (210), wherein the pipe liner (20) is formed without a liner layer in at least a part of the first end region (22), and wherein preferably only the support layer (210) is fastened to the device (10) by means of the outlet fastening element (24). [12] Sewer rehabilitation system (1) according to claim 11, further comprising a hose sleeve (230) for encasing and fixing the support layer (210) in a region of the hose liner (20) adjacent to the first end region (22). [13] Sewer rehabilitation system (1) according to claim 10, wherein the hose cuff (230) is designed to break at a predetermined pressure exerted by the hose liner (20) on the hose cuff (230) and / or to expand at a temperature of more than 40°C. [14] Use of a device (10) according to one of claims 1 to 8 or a hose cuff according to claim 9 or a sewer rehabilitation system (1) according to one of claims 10 to 13 for the rehabilitation, from a main sewer (2), of at least part of a secondary sewer (3) leading from the main sewer (2), in particular a drainage sewer, preferably a house connection sewer.

Images