DEVICE AND METHOD FOR SEALING OR REPAIRING A LEAKY AND / OR DAMAGED SPOT ON A PIPE CHANNEL WALL OF A PIPE

Description

[0001] The present invention relates to a device for sealing or repairing a leaky and / or damaged spot on the inner wall of a pipe, in particular a sewage pipe, comprising a volume-expandable bellows body which is designed to expand, when the bellows body is positioned in the region of the leaky and / or damaged spot in the interior of the pipe, with infiltration of a fluid, in particular a gaseous fluid, into a bellows body interior while increasing its volume, wherein a support section is formed on an outer surface of the bellows body, on which support section a resin-coated sealing mat can be arranged, which, when the bellows body is in an expanded state in the region of the leaky and / or damaged spot, can be fastened to the inner wall of the pipe by pressing it against it and cured.

[0002] The device is not limited to a specific type of pipe or a specific field of application. A pipe is understood to be a hollow body through which a gaseous, liquid or viscous fluid or a solid-liquid mixture (e.g. wastewater) can be transported along a predetermined route. Pipes are used both in private households and in the public utilities sector (e.g. for drinking water supply or wastewater disposal). Pipes are also regularly used in industrial applications. Furthermore, the present invention is not limited to use with pipes of a specific material; rather, it can be used with pipes made of a wide variety of materials such as metal, ceramic or plastic.

[0003] The use of volume-expandable bellows bodies, such as rubber bellows, is well-known in the field of pipe sealing and pipe rehabilitation. For example, rubber bellows are used in pipe sealing cushions, which can be inserted into a pipe and positioned at a predetermined location within the pipe. After a fluid infiltrates the interior of the rubber bellows, the pipe sealing cushion expands and presses against the pipe's inner wall, thereby closing or sealing the pipe. The contact pressure of the pipe sealing cushion can be flexibly adjusted by varying the amount of infiltrated fluid. Possible applications for such a pipe sealing cushion include closing pipes during repair or maintenance work, as well as preventing water backflow in the event of pipe bursts, flooding, sewer inspections, etc.

[0004] Depending on the pipe's profile, different shapes of pipe sealing cushions or rubber bellows are available. Cylindrical or conical-shaped pipe sealing cushions are particularly popular.

[0005] For example, EP 0 467 077 B1 discloses an inflatable pipe sealing cushion that can be inserted into a pipe at any point to seal it. The cushion described therein has conical end pieces and a circular cylindrical center piece. Sealing for different pipe diameters is achieved linearly at the conical end pieces in the region of the diameter that corresponds to the inside diameter of the pipeline. The cylindrical center piece, which generally forms folds, can also contribute to sealing if it is provided with a closed, circumferential sealing strip made of an elastic material. When inflated, the sealing strip creates a seal between the cylindrical center piece and the inside wall of the pipe, even in the area of ​​the folds.

[0006] DE 43 15 417 C1 and EP 0 625 670 B1 also disclose pipe sealing cushions that are mounted stationary in a pipeline to easily fulfill the function of conventional gate valves. The inflatable pipe sealing cushion is ring-shaped and mounted flat on the bracket radially outward. When inflated, the pipe sealing cushion bulges radially inward to such an extent that the radial inner wall is pressed against itself on all sides, thus securely sealing the pipeline. Such a pipe sealing cushion can only be used in a stationary installation.

[0007] DE 298 07 747 U1 describes various devices for sealing damaged pipelines with resin-impregnated sealing agents.

[0008] US 2016 / 186911 A1 shows a device for repairing pipelines, which has an inflatable bladder made of rubber.

[0009] WO 2004 / 023088 A1 discloses a device for sealing a pipe, including an inflatable bellows. A release agent can be sprayed onto the device before applying a resin material.

[0010] DE 10 2017 127458 A1 shows a rehabilitation packer with an elastic base body and an opening extending at least in sections within the base body in the longitudinal direction.

[0011] For the rehabilitation of leaky and / or damaged areas of a pipe, it is also known to use so-called rehabilitation packers. An inflatable rubber bellows is mounted on a rehabilitation packer that can be moved or slid within the pipe. Resin-impregnated rehabilitation mats can be arranged on the outer circumference of the rubber bellows. These mats can be pressed against the inner wall of the pipe when the rubber bellows is inflated, where they harden. Furthermore, the resin can penetrate cracks or open areas of the pipe when the rehabilitation mat is pressed against the inner wall of the pipe. After removing the rehabilitation packer (including the rubber bellows), the rehabilitation mat and the resin remain at the previously leaky and / or damaged area of ​​the pipe. The rehabilitation mats referred to here are referred to synonymously as "sealing mats" in this description of the invention.

[0012] In the known pipe sealing cushion or rehabilitation packer applications, or rather the rubber bellows used in them, it has been shown that when resin-impregnated sealing mats (rehabilitation mats) are used, the conventional rubber material of the rubber bellows can be damaged by the effects of the resin, especially during continuous use. Resin residues also often remain on the rubber surface of the rubber bellows. In the worst case, the effects of the resin can lead to leaks in the pipe sealing cushion.

[0013] Accordingly, the present invention is based on the object of providing a device for sealing a leaky and / or damaged area on the inner wall of a pipe, which device has increased robustness and resistance, in particular to resin, and can also be used reliably in continuous operation.

[0014] To solve this problem, a device having the features of claim 1 is proposed.

[0015] Furthermore, the present invention is based on the object of providing a reliable and robust method for sealing a leaky and / or damaged area on the inner wall of a pipe, which method is suitable for continuous use.

[0016] To solve this problem, a method having the features of claim 5 is proposed.

[0017] Furthermore, the present invention is based on the object of enabling the use of a device designed according to the invention as a pipe sealing cushion or as a pipe sealing cushion arranged on a rehabilitation packer that can be moved in a pipe, wherein the device, when used in such a way, has increased robustness and resistance, in particular to resin, and reliable use in continuous operation is enabled.

[0018] To solve this problem, a use according to claim 6 is proposed.

[0019] It should be noted that the features listed individually in the claims can be combined with one another in any technically reasonable manner (even across category boundaries, for example, between methods and devices) and demonstrate further embodiments of the invention. The description further characterizes and specifies the invention, particularly in conjunction with the figures.

[0020] It should also be noted that a conjunction "and / or" used herein between two features and linking them together is always to be interpreted in such a way that in a first embodiment of the subject matter according to the invention only the first feature can be present, in a second embodiment only the second feature can be present and in a third embodiment both the first and the second feature can be present.

[0021] The present invention relates to a device for sealing or repairing a leaky and / or damaged spot on the inner wall of a pipe, in particular a sewage pipe, comprising a volume-expandable bellows body which is designed to expand, when the bellows body is positioned in the region of the leaky and / or damaged spot in the interior of the pipe, with infiltration of a fluid, in particular a gaseous fluid, into a bellows body interior while increasing its volume, wherein a support section is formed on an outer surface of the bellows body, on which support section a resin-coated sealing mat can be arranged, which, when the bellows body is in an expanded state in the region of the leaky and / or damaged spot, can be fastened to the inner wall of the pipe by pressing it against it and cured.

[0022] In the context of the present invention, a "sealing" can be understood in particular as a local sealing of a leaky and / or damaged area on the inner wall of a pipe. Such local sealing can be achieved by sealing the leaky and / or damaged area with a sealing mat, which is provided with a resin (e.g., impregnated with it) before being attached to the leaky and / or damaged area. After the sealing mat is pressed against the inner wall of the pipe in the area of ​​the damaged and / or leaky area, the resin hardens. The resin can at least partially penetrate into the leaky and / or damaged structure and fill it. At the same time, the hardening resin leads to the sealing mat being attached to the inner wall of the pipe.The sealing mat – which can be made of fiberglass fabric (or other types of fabric), for example – provides additional structural reinforcement to the inner pipe wall in the area of ​​the leaking and / or damaged area. Provided the damaged area is free from leakage defects, this can also be considered a renovation or repair.

[0023] Likewise, "sealing" can be understood as closing a pipe with the aforementioned device. This is because the volume expansion of the bellows body allows it to adhere to the inner wall of the pipe in such a way that the pipe is completely sealed. In this case, too, the pipe, or indirectly also leaky and / or damaged areas, is "sealed." Furthermore, the aforementioned device can be used to close a pipe in an undamaged area and / or area not affected by leakage defects, so that repair or other sealing can be carried out in the area of ​​the leaky and / or damaged area(s). Thus, the aforementioned device also contributes to "sealing" damaged and / or leaky areas of a pipe.

[0024] The device proposed by the invention can be used as a pipe sealing cushion or rehabilitation cushion, or in conjunction with a rehabilitation packer (or a push hose). Use as a bypass cushion is also conceivable. Furthermore, the pipe sealing cushion can be provided with a passage (e.g., when used as a test cushion). In principle, the bellows body can be manufactured in any shape, particularly to match the shape of the pipe in which the aforementioned device is to be used. The cross-section of the bellows body can be circular, elliptical, oval, egg-shaped, or otherwise.

[0025] In the context of the present invention, a "leaking point" is understood to mean a point on the inner wall of a pipe through which either foreign substances can penetrate into the pipe or pipe contents can escape from the pipe. A "damaged point" can also be leaky, but this does not necessarily have to be the case. For example, damage in its early stages, e.g., a longitudinal or transverse crack (or a porous point) in the inner wall of the pipe, does not necessarily lead to a leak in the pipe. However, in order to counteract such a leak as a possible late consequence of damage at an early stage, sealing is recommended, for example, using the device proposed by the invention. The present invention is therefore also readily suitable for damage prevention.

[0026] In the context of the present invention, a volume-expandable bellows body is understood to be a body whose volume can experience volume expansion through suitable fluid infiltration, i.e., expands. The volume expansion can be isotropic or anisotropic (e.g., along a preferred direction); when a cylindrical (circular in cross-section) bellows body is positioned in a pipe, this occurs primarily in the radial direction, i.e., in the direction of the inner pipe wall. The expansion can also occur in all spatial directions; when a cylindrical bellows body is positioned in a pipe, for example, in the radial direction and, if necessary, also in the direction along the cylindrical bellows body. Depending on the shape of the bellows body, isotropic (uniform) expansion can also occur in all spatial directions (e.g., in the case of a spherical bellows body), at least until the bellows body abuts the inner pipe wall in one spatial direction.The expansion can therefore be limited by the pipe, especially the inner pipe wall. To allow sufficient expansion, the bellows body is made of an expandable or elastic material.

[0027] The bellows body is designed to be leak-proof and resistant to external media (e.g., water), while also being mechanically robust and abrasion-resistant to solids, such as the inner pipe wall. This is particularly important when inserting the device or bellows body into the pipe, as this inevitably results in friction against the inner pipe wall.

[0028] The fluid mentioned can be a gaseous or liquid fluid. Air, CO2 or N2 are particularly suitable as gaseous fluids. Liquid fluids can in particular be water or oils. The fluid can be infiltrated or admitted into the bellows body via a suitable inlet valve, for example under pressure (e.g. by means of a suitable pumping device). The same applies to the discharge of the fluid, which can be removed from the bellows body via a suitable discharge valve. In principle, it is also possible to heat the infiltrated fluid to a predetermined temperature and only then admit it into the bellows body interior (which provides a cavity or suitable cavity chambers). This can improve the curing of the resin or enable the curing of a thermosetting resin.It should be emphasized at this point, however, that the invention also readily enables the application of sealing mats impregnated with a cold-curing resin, as well as the curing of the resin at room temperature or at a temperature prevailing in the pipe to be sealed or repaired. Additional heating or irradiation means can also be provided on the device to cause the resin to cure.

[0029] As mentioned, a support section is formed on an outer surface of the bellows body, on which a resin-coated sealing mat can be arranged. The support section can be formed in a partial area of ​​the outer surface; equally, several (spaced apart) support sections can be formed on the outer surface of the bellows body. Alternatively, the entire surface of the bellows body can function as a support section and be designed as such. The latter is advantageous because it allows for the free arrangement of a sealing mat on any location on the outer surface of the bellows body.The design of a suitable support section is advantageous because it allows the bellows body to be removed relatively easily after the resin-coated sealing cushion has been attached to the inner pipe wall. The support section thus facilitates separation of the bellows body from the sealing cushion, for example, by acting as a release agent. It is advantageous if the support section has anti-adhesion properties with respect to the resin used. Likewise, the support section must also meet the desired requirements for tightness, material robustness, abrasion resistance, and extensibility.

[0030] In order to meet these requirements, the device according to the invention is characterized in that the carrier section is made of para rubber.

[0031] It has surprisingly been found that para rubber exhibits particular resistance to resin. As mentioned, a resin-coated (resin-coated or resin-impregnated) sealing mat can be arranged on the device proposed by the invention, in particular the bellows body or a support section provided there. In this case, the resin inevitably also comes into contact with the outer surface of the bellows body. Accordingly, it is crucial that the outer surface exhibits sufficient resistance to the resin and, furthermore, that the outer surface can be sufficiently separated from the resin-coated sealing mat (separation effect). These requirements are met to a particularly high degree by para rubber as the material for the support section.The use of para rubber thus enables the continuous and repeated use of the device proposed by the invention for sealing and / or repair purposes, with improved resin resistance of the outer surface of the bellows body. The longevity of such a device is correspondingly increased. Para rubber exhibits exceptionally high elasticity, a crucial property for ensuring sufficient volume expansion of the bellows body. Para rubber is a slightly vulcanized rubber that is easy to process and attach to the bellows body.

[0032] The support section made of para-rubber—when a resin-coated sealing pad is arranged on the support section—allows the bellows body to be removed relatively easily after the resin-coated sealing pad has been attached to the inner pipe wall. The material of the support section thus facilitates separation from the sealing pad, for example, acting as a release agent. The para-rubber thus exhibits anti-adhesion properties with respect to the resin.

[0033] As already mentioned above, the support section is formed from para rubber. The support section can be formed in a partial area of ​​the outer surface of the bellows body. However, the entire outer surface of the bellows body can also easily provide a support section, i.e., be formed from para rubber. The term used here, according to which the support section is "formed" from para rubber, can be understood, within the meaning of the present invention, to mean that the material forming the bellows body (e.g., an outer material layer of the bellows body) as such provides the support section. Furthermore, "formed" can be understood to mean that the outer surface of the bellows body has a "coating" of para rubber, which then forms the support section. The coating can be applied partially or over the entire surface of the bellows body.In the context of the present invention, a "coating" is understood to mean the application of one or more layers of para rubber to the outer surface of the bellows body (e.g. an outer material layer) in order to form a support section.

[0034] The advantageous embodiments specified in the subclaims as well as further advantageous (or possible) embodiments of the device proposed by the invention are described in detail below.

[0035] According to a first alternative of a device proposed by the invention, the bellows body is made of a multi-layer material, with the outer surface of the bellows body being formed by an outer material layer of the multi-layer material. In one embodiment of this alternative, the outer material layer is at least partially made of para-rubber and forms the support section. In one embodiment of this alternative, the outer material layer has a para-rubber coating forming the support section, which at least partially covers the outer surface of the bellows body.

[0036] The statement that the outer material layer of the bellows body is at least partially made of para-rubber means that at least one section or region of the outer material layer is made entirely of para-rubber. Several sections made of para-rubber, arranged at a distance from one another, can also be provided. Adjacent sections can, however, be made of a different material. Alternatively, the outer material layer can also be constructed from several partial layers, of which only the outer partial layer is at least partially (i.e., in regions or areas) made of para-rubber. This variant is also encompassed by the statement that the bellows body is at least partially made of para-rubber. A "construction" made of para-rubber must be distinguished from a coating with para-rubber (a variant of the para-rubber coating).

[0037] The formation of the bellows body from a multi-layer material means that several layers (at least two layers) of the same or different materials are bonded or positively connected to one another to form a bellows body wall. The bellows body does not have to be formed as a single piece; rather, it can have several interconnected parts, e.g., in the case of a cylindrical bellows body geometry, a shell part that is connected to end parts on the front side. These parts can each be formed from several layers of the same or different materials. It is also known for bellows bodies with other geometries to be manufactured from several parts and then bonded together.The possibility of manufacturing a bellows body from several parts (each comprising one or more material layers) is well known in the production of pipe sealing cushions or bellows bodies for rehabilitation packers. The connection of individual parts of a bellows body (e.g., a shell part with end parts) can be achieved by sewing, knitting, welding, gluing, riveting, screwing, etc. Material layers can also be joined together using the aforementioned connection methods. However, other methods can also be used to join the material layers, such as thermoforming, thermal joining, hot welding, or other processes.

[0038] When the bellows body is manufactured from multiple layers, the outer layer can be designed to seal the bellows body from the inside, thus preventing liquids, gases, or solids from penetrating the interior of the bellows body, while also preventing the contents of the bellows body (e.g., fluids) from escaping to the outside. Inner layers can then serve a supporting function to provide the bellows body with sufficient mechanical stability. However, this does not preclude the possibility of internal material layers also contributing to sealing the bellows body.

[0039] According to a second alternative, the bellows body is made of a single material layer, with the outer surface of the bellows body being formed by the single material layer. This (single) material layer can be formed at least partially from para-rubber. The material layer additionally or alternatively has a para-rubber coating forming the support section, which at least partially covers the outer surface of the bellows body.

[0040] Regardless of whether the bellows body is constructed from one material layer or several material layers, it is necessary that at least in those areas of the bellows body in which a resin-coated sealing mat is to be arranged during normal use, the outer material layer is coated with para rubber or is made of para rubber.

[0041] To form the para-rubber coating, it may be vulcanized onto the bellows body. This type of vulcanization ensures a mechanically stable and durable bond for the para-rubber coating. Vulcanization is generally understood to be a process by which rubber is converted into an elastomeric rubber. In this case, the para-rubber coating can be applied, for example, using conventional sulfur vulcanization, vulcanization with peroxides, metal oxides, or radiation-induced vulcanization.

[0042] According to a further embodiment of a device proposed by the invention, the sealing mat can comprise a glass fiber fabric as a carrier material for a resin. Glass fiber fabric is an important construction material that can, for example, improve the mechanical properties of composite components (in particular glass fiber-plastic composite components). At the same time, glass fiber fabric is also excellently suited as a support and / or carrier material that can be used to structurally reinforce damaged material surfaces (e.g., a pipe). Such a glass fiber fabric can be applied flat and flush to a surface and attached to it. Glass fiber fabric is also characterized by being particularly resistant to aging and weathering (moisture-resistant), chemically inert, and non-flammable.Ultimately, fiberglass fabric exhibits excellent properties for use in pipes, particularly sewer pipes. Furthermore, fiberglass fabric exhibits a relatively high modulus of elasticity, which is also beneficial when used on a volume-expandable bellows body and when arranged on curved surfaces such as pipe interior walls. Furthermore, fiberglass fabric is a suitable carrier for a resin, which—as described above—is used to attach the fiberglass fabric to the pipe interior wall and, together with the sealing mat (the fiberglass fabric), also seals the damaged and / or leaking area. The resin used can—but does not have to—be a multi-component resin, for example.

[0043] According to a further embodiment of a device proposed by the invention, the bellows body can be provided with one or more valves for filling and draining the fluid. The valves can be connected to lines, hoses, etc. during use to fill the bellows body with the fluid and expand it on-site (i.e., inside the pipe). It must also be ensured in the area of ​​the valves that the bellows body is sealed to the outside, i.e., that the penetration of external substances into the bellows body and the unintentional escape of fluid are prevented.

[0044] As mentioned at the beginning, the object underlying the invention is also achieved with a method for sealing or repairing a leaky and / or damaged area on the inner wall of a pipe. The pipe can be, as mentioned, a sewer pipe. The method comprises the following steps: a. Providing a volume-expandable bellows body, wherein a support portion for a resin-coated sealing mat is formed on an outer surface of the bellows body;and wherein the support section is formed from para rubber and wherein aa) the bellows body is made from a multi-layer material, wherein the outer surface of the bellows body is formed by an outer material layer of the multi-layer material and either the outer material layer is at least partially formed from para rubber and forms the support section or the outer material layer has a para rubber coating forming the support section, which at least partially covers the outer surface of the bellows body or bb) the bellows body is made from a single material layer, wherein the outer surface of the bellows body is formed from the single material layer and the material layer has a para rubber coating forming the support section, which at least partially covers the outer surface of the bellows body; b. Arranging a resin-coated sealing mat on the support section;c. Positioning the bellows body inside the pipe in the area of ​​the leaking and / or damaged spot; d. Infiltrating a fluid, in particular a gaseous fluid, into the interior of the bellows body, whereby the bellows body expands as a result of the fluid infiltration, increasing in volume; e. Attaching the resin-coated sealing mat to the inside wall of the pipe by i. pressing the resin-coated sealing mat against the leaking and / or damaged spot on the inside wall of the pipe as a result of the expansion of the volume of the bellows body, and ii. Curing the resin-coated sealing mat; f. Removing the bellows body from the pipe.

[0045] The "provision" of the bellows body mentioned in process step a. can, within the context of the process, be understood as both the manufacture of the bellows body and any other provision (e.g., purchase or simple delivery, unpacking, or preparation) of the bellows body. A resin-coated sealing mat is, as mentioned above, a sealing mat coated with, impregnated with, or impregnated with a resin. The sealing mat is arranged, i.e., positioned, on the support section in accordance with process step b. Multiple sealing mats can also be arranged on one or more support sections of the bellows body. The arrangement can be done manually or mechanically.

[0046] As mentioned in step c., the bellows body is positioned inside the pipe in the area of ​​the leaking and / or damaged area. The leaking and / or damaged area can have been previously detected and localized using a suitable reconnaissance method, for example, a camera-based method. Based on the location, the bellows body (in a non-expanded state) can then be positioned at the corresponding location inside the pipe, for example, using a positioning device. A positioning device can be, for example, a transport trolley, a rolling or pushing device. Rollers or wheels can also be arranged on the bellows body so that the bellows body can be positioned inside the pipe using a push hose.

[0047] After positioning, a fluid (e.g., air) is infiltrated or introduced into the interior of the bellows body (via a suitable supply line and valves). This causes the bellows body to expand toward the inner pipe wall. This presses the resin-coated sealing mat against the leaking and / or damaged area on the inner pipe wall. During or after this process, the resin-coated sealing mat can harden. Finally, the bellows body is removed from the pipe.

[0048] A device designed according to the invention can be used as a pipe sealing cushion or as a pipe sealing cushion arranged on a rehabilitation packer that can be moved in a pipe.

[0049] Further features and advantages of the invention will become apparent from the following description of a non-limiting embodiment of the invention, which is explained in more detail below with reference to the drawing. This drawing schematically shows: Fig. 1 shows a bellows body positioned within a pipe in the region of a leaking and / or damaged area as a component of a device according to the invention, wherein the bellows body is shown in a non-volume-expanded state; Fig. 2 shows the device according to Fig. 1 , where the bellows body is shown in a volume-expanded state.

[0050] In the Figure 1 A device 1 according to the invention for sealing or repairing a leaky and / or damaged area 2 on an inner wall 3 of a pipe 4 is shown schematically. The pipe 4 can, for example, be a sewer pipe which has a crack as an example of a leaky and / or damaged area 2, wherein such a crack can lead to a leak in the pipe 4.

[0051] The illustrated device 1 comprises a volume-expandable bellows body 5, which is positioned in the region of the leaking and / or damaged area 2 of the pipe 4. A support section 7 is formed on an outer surface 6 of the bellows body 5, on which a resin-coated sealing mat 8 is arranged. In the present example, the support section 7 is designed in the form of a partial coating of the outer surface 6 of the bellows body 5. The resin-coated sealing mat 8 is provided with resin or impregnated with resin before being arranged on the support section 7.

[0052] After positioning the bellows body 5 in the area of ​​the leaking and / or damaged area 2, the interior of the bellows body is infiltrated (e.g., inflated) with a fluid, such as air. In this process, the bellows body 5 expands, increasing its volume. In an expanded state of the bellows body 5—see Fig. 2- the resin-coated sealing mat 8 is pressed against the inner wall 3 of the pipe 4 in the area of ​​the leaking and / or damaged area 2. As a result, the resin-coated sealing mat 8 hardens and remains at the leaking and / or damaged area 2 of the pipe 4 after the bellows body 5 is removed. Before the bellows body 5 is removed, the fluid (e.g., air) is released via a valve, and the volume of the bellows body 5 decreases. The bellows body 5 or the device 1 can then be easily removed from the pipe 4. As explained above, the support section 7 is formed from para rubber according to the invention. List of reference symbols

[0053] 1Device 2Position 3Pipe inner wall 4Pipe 5Bellows body 6Outer surface 7Support section 8Sealing mat

Claims

1. Device (1) for sealing or repairing a leaking and / or damaged location (2) on an inner pipe wall (3) of a pipe (4), in particular a waste water pipe, comprising a volume-expandable bellows body (5) which is configured to expand when the bellows body (5) is positioned in the region of the leaking and / or damaged location (2) in the interior of the pipe, with infiltration of a fluid, in particular a gaseous fluid, into a bellows body interior, with an increase in its volume, wherein a carrier portion (7) is formed on an outer surface (6) of the bellows body (5), on which carrier portion (7) a resin sealing mat (8) can be arranged, which in an expanded state of the bellows body (5) in the region of the leaking and / or damaged location (2) can be connected to the inner pipe wall (3) of the pipe (4) by pressing against the latter and can be hardened, wherein the carrier portion (7) is formed from para rubber, wherein a) the bellows body (5) is made from a multilayer material, the outer surface (6) of the bellows body (5) being formed by an outer material layer of the multilayer material and either the outer material layer being formed at least partially from para rubber and forming the carrier section (7) or the outer material layer having a para rubber coating forming the carrier section (7), which coating at least partially covers the outer surface (6) of the bellows body (5), or b) the bellows body is made from a single layer of material, wherein the outer surface (6) of the bellows body (5) is formed by the single layer of material and the layer of material has a para-rubber coating forming the carrier section (7), which coating at least partially covers the outer surface (6) of the bellows body (5).

2. Device (1) according to claim 1, characterised in that the sealing mat (8) comprises a glass fibre woven fabric as a carrier material for a resin.

3. Device (1) according to claim 2, characterised in that the resin is a multicomponent resin.

4. Device (1) according to one of the preceding claims, characterised in that the bellows body (5) has one or more valves for introducing and discharging the fluid.

5. Method for sealing or repairing a leaking and / or damaged location (2) on an inner pipe wall (3) of a pipe (4), in particular a waste water pipe, comprising the following steps: a. providing a volume-expandable bellows body (5), wherein a carrier section (7) for a resin sealing mat (8) is formed on an outer surface (6) of the bellows body (5), and wherein the carrier section (7) is formed from para rubber, wherein aa) the bellows body (5) is made of a multilayer material, wherein the outer surface (6) of the bellows body (5) is formed by an outer material layer of the multilayer material and either the outer material layer is formed at least partially of para rubber and forms the carrier section (7) or the outer material layer has a para rubber coating forming the carrier section (7), which coating at least partially covers the outer surface (6) of the bellows body (5) or bb) the bellows body is made from a single layer of material, wherein the outer surface (6) of the bellows body (5) is formed by the single layer of material and the layer of material has a para-rubber coating forming the carrier section (7), which coating at least partially covers the outer surface (6) of the bellows body (5); b. arranging a resin sealing mat (8) on the carrier section (7); c. positioning the bellows body (5) in the interior of the pipe in the area of the leaking and / or damaged location (2); d. infiltrating a fluid, in particular a gaseous fluid, into a bellows body interior, wherein the bellows body (5) expands as a result of the fluid infiltration with an increase in its volume; e. connecting the resin sealing mat (8) to the inner pipe wall through: i. pressing the resin sealing mat (8) against the leaking and / or damaged location (2) on the inner pipe wall (3) of the pipe (4) as a result of the expansion of the volume of the bellows body (5), and ii. curing the resin sealing mat (8); f. removing the bellows body (5) from the pipe (4).

6. Use of a device (1) formed according to one of the claims 1 to 4 as a pipe sealing pad or as a sealing pad arranged on a mobile rehabilitation packer movable in a pip e (4).