EP0932794A1

EP0932794A1 - Renovation apparatus for pipes

Info

Publication number: EP0932794A1
Application number: EP97948776A
Authority: EP
Inventors: Herbert Dietrich
Original assignee: EST Einlauf-Sanierungstechnik GmbH
Current assignee: EST Einlauf-Sanierungstechnik GmbH
Priority date: 1996-10-25
Filing date: 1997-10-22
Publication date: 1999-08-04
Also published as: DE19644466A1; DE29718641U1; WO1998019098A1

Abstract

The invention starts from a renovation apparatus for pipes (1) with a tubular supporting body (2) capable of moving within the pipe (1) and having a rubber elastic expansible part (23) that can be pressed under an inner pressure onto the pipe wall, an inner, stiffer supporting part (21) joined to the part (23), and an inflatable balloon (11) that can be introduced into a pipe connection (10) or branch. A filling material can be supplied through filling openings (3) to damaged sites (4) sealed by the supporting body (2). The supporting part (21) has an outer contour (5) adapted to the pipe (1) and is composed of a semi-cylindrical shell (24) with a variable curvature radius whose outer surface is firmly and tightly joined to the expansible part (23), at least in the area of an opening (12) provided for the separate inflatable balloon (11).

Description

Refurbishment device for refurbishing sewer pipes

The invention relates to a renovation device for renovating sewer pipes according to the preamble of claim 1.

Sewer pipes, especially on sewer connections and sewer branches, are often damaged. Cracks or major defects occur mainly due to subsidence or subsidence; Corrosive or erosive components of the wastewater also cause damage. These damaged areas can allow uncontrolled amounts of dangerous wastewater to seep into the ground and pose a great danger to the groundwater and thus to the drinking water of entire regions. As a result, any damage found must be remedied as quickly as possible.

Refurbishments of this type are particularly difficult for sewers that are not accessible. In order to avoid complex earthworks and road construction work, sewer robots, so-called “packers, are used for this, which fill the damaged areas with a filling compound from the inside of the sewer, for example.

From DE 42 07 038 C2 a packer for lining the transition area between a main sewage pipe and a confluent house connection pipe is known. An expandable rubber jacket surrounds a support tube with which it is firmly connected at the ends. The support tube has an opening in the central area into which a cylinder connected to the rubber jacket or formed in one piece can be inserted. The packer first becomes a household end pipe aligned. Subsequently, the tightly sealed interior of the support tube is pressurized, causing the cylinder to protrude into the house connection pipe and place it with the rubber jacket on the corresponding inner wall of the main pipe or house connection pipe.

In the transition area between the rubber jacket and the cylinder, filler openings are provided for a casting compound, which is supplied through lines from the front of the packer.

If casting compounds are supplied at high pressure, so that they completely fill and seal the damaged areas and cracks, the pressure inside the rubber jacket and the cylinder must be increased significantly. There is the

Danger that the elastic material penetrates m large damaged areas and either impairs the penetration of the sealing compound or is pushed back by the sealing compound to such an extent that bulges arise in the sewer pipes, which hinder the flow or later have to be mechanically processed again. If you choose a less elastic material for the rubber jacket or the cylinder, a secure seal is at risk and the packer is only suitable for sewer pipes in a narrow diameter range. Therefore, a large number of packers must be kept ready for the often very different diameters. Furthermore, cylinders made of less elastic material are difficult to slip in and out, which severely limits their service life. In addition, they only reach very little into the house connection pipe, so that damage further away can no longer be remedied. Furthermore, from DE 40 22 103 AI a method and a device for sealing an inlet line leading into a sewer pipeline is known. Here, a drum with a cylindrical drum body closed at both ends is surrounded by an expansion body, which is tightly connected to the drum at its ends. There is a recess in the cylindrical outer surface of the drum, into which an annular pressure shield with a curvature adapted to the edge region of the mouth opening of the feed line is inserted. The pressure shield covers the edge area of the mouth opening with a lateral protrusion and is pressed against the channel wall by a longitudinally adjustable lifting cylinder, which is supported in the drum. The tubular expansion body made of highly elastic material is stretched over the drum and is inflated by a pressure medium supplied from the outside, for example compressed air. As a result, the expansion body expands a little into the mouth of the supply line.

To seal the mouth of the inlet line, a connection piece is placed in the adjacent duct shaft on the expansion body, so that the prefabricated connection opening is located centrally above the pressure cylinder engaging the pressure plate. After the drum has been aligned by means of a television camera, the telescopic cylinder is extended, the connecting piece resting on the printing plate being raised and pressed against the edge of the mouth of the inlet line. The expansion body is now inflated with pressure medium and braced against the inner wall of an inliner. In this case, a nonwoven fabric of the connector held on the edge of the connection opening by the pressure shield is pressed from the expansion body which expands into the mouth of the inlet line into the mouth opening, where it opposes one another creates the pipe wall. After placing the connector, a heater heats the interior of the drum, which speeds up the curing process.

So-called inliners can be used with this method, but no damaged areas of different sizes or damaged areas located deeper in the connecting channel can be repaired distributed over the circumference of the sewer pipe.

Furthermore, a method and a device for sealing sewer pipes is known from EP 0 533 999 AI. Here, an inner, cylindrical support body is surrounded by a rubber sleeve, which is tightly connected to the end face in the end regions. The rubber sleeve forms a pressure chamber with the support body. If pressure medium is supplied to the pressure chamber, the rubber sleeve expands and lies against the duct wall. The rubber sleeve is less stretchable in the central area than in the end areas, so that the end areas initially rest against the channel wall, while an annular space is formed in the central area, into which sealing material is pressed by means of a hose line with pressure. During the filling of the sealing material into the annular space, the rubber sleeve is inflated further, so that the annular space is constantly reduced during the filling. Thus, the sealing material is pressed on, in and / or through the points to be sealed, in such a way that only a slight bead remains on the inner tube wall.

However, it is not easy to adjust the elasticity of the rubber sleeve to the pressure of the sealing material and the pressure in the pressure chamber so that only one slight bulge arises. Thus, the shortcomings described above also exist here. In addition, the device and the method are not suitable for the rehabilitation of sewer branches.

In another method described in DE 44 15 962 AI, which is provided in particular for the renovation of house connection pipes, a formwork panel with a bladder is moved under the house connection and then raised so that the bladder is moved into the house connection. The formwork panel, which is adapted in its curvature to the inner radius of the sewer pipe and carries a rubber bead on its edge, is pressed by means of hydraulically or pneumatically operated lifting cylinders around the area of the house connection against the sewer wall. The bladder, which extends through a through opening m of the formwork panel into the house connection, is inflated and thus seals the house connection. At the same time, it forms a formwork in this.

The formwork panel is limited to a relatively small peripheral area. Larger areas cannot be sealed, so that several larger and smaller damaged areas distributed over the circumference, such as cracks, holes, cannot be repaired in one operation with the described device, but only damaged areas that are around the area of the house connection and within the formwork panel. Furthermore, the sealing rubber bead creates a relatively thick, sharp-edged layer, which narrows the channel cross-section after refurbishment and adversely affects the flow. Furthermore, a relatively large amount of filler is required. The invention has for its object to provide a renovation device of the type mentioned in such a way that several large and small damaged areas distributed over the circumference can be renovated in one operation without significantly affecting the flow conditions due to the renovation, filling masses under high pressure can be introduced.

The object is achieved according to the invention by the features of claim 1, while advantageous refinements and developments of the invention can be found in the subclaims.

According to the invention, the support member has an outer contour adapted to the sewer pipe and is made from an

Radius of curvature changeable, formed essentially semi-cylindrical shell. As a result, the support body has a relatively solid jacket in part of its circumference, which although it has an elastic layer which can seal against the channel wall, but is not pressed into the damaged areas themselves by the internal pressure. Since the radius of curvature of the shell adapts to the inside diameter of the sewer pipe under pressure, the support body and thus the renovation device is suitable for sewer pipes in a large diameter range.

The part of the circumference supported by the support part is aligned with the renovation area with the largest damaged areas, while smaller damaged areas can be located in the peripheral area that is expandable

Part is covered. As a rule, the larger damaged areas are in the area of sewer connections or sewer branches. Therefore in the middle of the range Shell provided a passage opening for a separately arranged bladder.

Due to the separate arrangement it is possible to make the bladder independent of the expandable part

To design the requirements of the connecting channel and to dimension it according to its elasticity. The bladder is guided precisely by the support body in the area of the passage opening, so that there are clear diameter ratios in this area, in particular if the bladder has a reinforcement in this area.

Furthermore, due to the separate arrangement of the bladder, the support body can be aligned easily and precisely by arranging a camera and a light source in the immediate vicinity of the bladder in the support body. The camera, including the bubble and the light source, are moved during the alignment until the camera and the light source are located under the passage opening. This means that the renovation device can be aligned very easily and precisely. The bladder then resumes its original position without the support body having to be moved in the sewer pipe.

The support part forms a pressure chamber with the expandable part, the expandable part being firmly and tightly connected to the support part at least in the area of the passage opening. If pressure is applied to the pressure chamber, the jacket surface of the support body rests against the channel wall, the radius of curvature of the half-shell adapting to the inside diameter of the channel pipe. According to one embodiment of the invention, the supporting part is formed by a cylindrical shell made of resilient material formed with an elliptical cross section. The cylindrical shell can also consist of two half-shells which extend in the axial direction and are connected to one another by the long sides of their concave, mutually facing inner surfaces. The passage opening for the bladder is located in a central area, specifically in a peripheral area that has a larger radius of curvature. In the diametrically opposite circumferential area, the expandable part forms a pressure chamber with the lateral surface of the support part. If this is pressurized, the cross-section of the supporting part is deformed into a flatter ellipse, so that the jacket of the support body assumes a larger radius of curvature in the area of the passage opening, while in the opposite circumferential area the elastically expandable part bears against the channel wall. For particularly thin filling materials, it is expedient that the pressure chambers form an annular space at the ends of the support body, so that the expandable part forms continuous axial seals in these areas. The annular space can be formed, for example, by a circumferential groove or bead in the shell, the edges of which are tightly connected to the rubber-expandable part.

So that the supporting part can cover the largest possible area of different radii of curvature without the material stress in the area with the smaller radii of curvature becoming too great, it is expedient to connect the half-shells in an articulated manner. The joint can e.g. can also be formed by a region made of a correspondingly flexible material.

By using a tubular support body which has an outer contour adapted to the sewer pipe and which consists of a supporting part and at least one part that can be expanded by pressure, so that the support body can be tightly applied in at least one area in the axial direction over the entire circumference of the sewer pipe, the sewer pipe is completely switched off at these areas. Damage points distributed over the entire circumference can thereby be repaired in one operation. The support body seals off all damage points to the rest of the sewer pipe that lie in its area. High pressures can be used so that the filler can also reach distant damaged areas and penetrate into small cracks. Furthermore, the support body is flush with the inner surface of the channel, whereby the flow cross-sections and resistance coefficients are retained. Furthermore, the consumption of filling compound is reduced to a minimum.

A liquid or gaseous pressure medium can be applied to the pressure chamber, e.g. Air or water. Since the damaged areas are often repaired with fillers that are pressed with high pressure, water is particularly suitable. It is almost incompressible and line damage and leaks do not cause environmental damage.

The filler should be transported over the circumference to the individual damaged areas without the

Flow cross section of the sewer pipe after the renovation is greatly reduced. A distributor pocket and distributor grooves, which lead to the individual damaged areas, serve this purpose. The distributor pocket and the distributor grooves can be integrated in the support body or preferably introduced into the sewer pipe wall, for example by milling. Damaged areas can also be used as a distribution pocket and distribution grooves if they have a corresponding one Have size and shape or be prepared for it. If the distribution pockets are inserted in the channel wall, the flow cross sections remain unchanged due to the renovation. The filling compound is distributed along the distributor pocket and the distributor grooves and fills these and the defective spots, the support body being applied to the entire circumference of the channel wall at least over the length of the damaged spots and thus forming a formwork form.

Several filler openings arranged in the circumferential direction and / or in the longitudinal direction support a uniform distribution of the filler compound. If the filler openings can be controlled individually, damage areas distributed over the circumference that are not connected to each other can be repaired in one operation, e.g. via a distributor bag or via distributor grooves.

There is often water or air in the damaged areas before they are filled with filling compound. Venting or drainage openings in the area of the filler openings serve to allow water or air to escape.

The bladder is rolled up in the support body and is essentially cylindrical. As a result, it can have a considerable length and can be driven far into the sewer connection. The end of the bubble is expediently more elastic than the other areas, so that it seals the rehabilitation site even at a lower pressure and the filling compound can be well distributed between the end of the bubble and the passage opening. Spacers in the form of longitudinal grooves, knobs or the like ensure that the filling compound can reach all areas well and that the bladder does not extend in some areas, especially when the pipe is inclined to the sewer pipe Duct connections, laid flat on the duct wall. It is sufficient if the long grooves are a few millimeters deep and the knobs are a few millimeters high. When the filling compound has spread, the full pressure is released and the bladder attaches itself to the channel wall in the less elastic area.

Further details of the invention and the advantages resulting therefrom can be found in the following description, in which various exemplary embodiments are presented. Numerous features are shown and described in connection in the description and in the claims. The person skilled in the art will expediently also consider the features individually and combine them into further useful combinations.

Show it :

FFiigg .. 11 a section through a defective sewer pipe and a renovation device before the renovation process,

Fig. 2 shows an enlarged view along the line II-II in FIG. 1 and a cover,

Fig. 3 a renovation device with the bladder extended,

FFiigg .. 44 a renovation device in the renovation process,

Fig. 5 is an enlarged view taken along the line V-V in FIG

Figure 4,

Fig. 6 a defective sewer pipe,

Fig. 7 a sewer pipe with an inserted distributor pocket and distributor grooves,

Fig. 8 a renovation device before the renovation process,

Fig. 9 a renovated sewer pipe, 10 shows a section of a renovation device with a displaceable bladder, FIG. 11 shows a section along the line XI-XI in FIG

Fig. 5, wherein the bladder has longitudinal grooves and is supplied with a pre-pressure and

Fig. 12 is a bubble with knobs.

1 shows a sewer pipe 1 with a sewer connection 10 or a sewer branch. In the area in which the sewer connection 10 and the sewer pipe 1 meet, in the area of the so-called joint 18, severe damage 4 occurs particularly frequently, from which cracks can run far into the sewer pipe 1.

1 shows a rehabilitation device with a tubular support body 2 before the rehabilitation process. This is moved through the sewer pipe 1 on preferably spring-loaded wheels 15 into the area of a sewer connection 10. The support body 2 is mounted on a tube 16 which passes through it and on which the wheels 15 are resiliently mounted at the two ends 13, 14. The suspension is used so that the renovation device can be driven over bumps without getting stuck.

A camera 9 and a light source (not shown) are also attached to the pipe 16, in order to be able to correctly position the renovation device from outside the sewer pipe 1 and to monitor the renovation process. In addition, lines for the pressure medium, the cooling and heating medium, the electrical supply, for the filling compound, for water, etc. are led through the pipe 16 into the renovation device. They are fed centrally, bundled, without hindering the renovation process. In order to be able to position the refurbishment device correctly, for example if the sewer connection 10 is arranged somewhat offset, the support body 2 has a support body running parallel to the longitudinal direction of the sewer pipe 1

Axis rotatable. Furthermore, the renovation device can be positioned quickly and easily if, according to the invention, a camera 34 or another viewing device with a light or radiation source 35 is arranged directly next to a bubble 11 in the support body 2 and these, including the bubble 11, can be moved until the camera 34 and the light source 35 are located under a passage opening 12. The renovation device can thus be positioned exactly to the damaged areas 4 and the sewer connection 10, without this then having to be moved in the sewer pipe 1. This can be achieved, for example, by the bladder 11, the camera 34 and the light source 35 being arranged displaceably on a rail 36 and the bladder 11 assuming its defined position relative to the passage opening 12 within the redevelopment device after the refurbishment device has been set up.

In order to be able to repair the damaged areas 4 on the sewer connection 10 with a filling compound such as concrete, synthetic resin or other hardening materials, the sewer connection 10 and the sewer pipe 1 must first be switched off so that the filling compound can be pressed onto the sewer walls. The duct connection 10 is switched off with the bladder 11 which is located in the support body 2 when the renovation device is retracted and, as soon as the support body 2 is correctly positioned, is rolled out under, for example, air or water pressure. It is guided by a guide 32 through the through opening 12 in the support body 2 and retracted into the channel connection 10. The bladder 11 does not interfere with this while the rehabilitation device is being moved in the sewer pipe 1, and can easily be inserted sufficiently far into the sewer connection 10.

After the bladder 11 has been introduced, it and an expandable part 23 of the support body 2 are expanded. The bladder 11 is reinforced in the area 17 of the joint 18 so that the bladder 11 does not lie in the damaged areas 4 in this area 17. Towards the end of the bubble 11 and in the

Through opening 12, however, the bladder 11 has more flexible, well-sealing material; in particular, it is advantageous if the material at the bladder end 43 is significantly more elastic and already contacts the wall of the duct connection 10 at a lower pressure. In this way, the filling compound can initially be well distributed in the area between the bubble end 43 and the passage opening 12, in order to then be pressed into the damaged areas 4 with increasing pressure. Advantageously, spacers, e.g. in the form of longitudinal grooves 41 or knobs 42, that the bladder 11 presses against a wall area over its entire surface, which can occur when the duct connection 10 hits the duct pipe 1 at an acute angle.

The renovation device can also be used in sewer pipes 1 without sewer branch 10. For this purpose, the passage opening 12 is closed with a cover 20.

The tubular support body 2 consists of a support part 21 and the part 23 which can be expanded elastically by pressure and which forms an expandable pressure chamber 22 with the support part 21 in defined areas. At least in the area of the passage opening 12, but expediently Also in the region of the ends 37, 38 and the remaining circumferential half of the support body 2, in which the through opening 12 is arranged, the support part 21 is firmly and tightly connected to the expandable part 23 and forms a unit with it. If the expandable part 23 is expanded with air or preferably water pressure, it is pressed with the connected support part 21 to the area of the largest damaged areas 4. The expandable part 23, which is not firmly connected to the support part 21, then lies against the remaining wall of the sewer pipe 1. The area of the smaller damaged areas 4 is sufficiently removed from the expandable part 23.

The supporting part 21 can consist of a cylindrical body with an oval or round cross section. Refurbishment work on sewer pipes 1 with cross sections of different sizes must often be carried out. For this purpose, the support part 21 should be able to adapt to different diameters. This is achieved by this being made of an elastically flexible material, for example made of special metal, such as VA steel or plastic or other elastic materials. If the supporting part 21 is pressed against the sewer pipe 1 by the expandable part 23, its radius of curvature adapts to the inside diameter of the sewer pipe 1. A greater adaptability is achieved in that the support part 21 consists of two elastic shells 24, 25 which are connected to joints 26, 27. When the shells 24, 25 are pressed against the wall of the sewer pipe 1, they are pressed flat. The joints 26, 27 compensate for changes in length and angle at the joints of the shells 24, 25 almost without tension. The support part 21 is covered with the expandable part 23, which is fixed in the direction of the joint 18 on the support part 21, for example glued or vulcanized and connected to form a unit. With the same materials of different hardness, both parts 21, 23 can be produced in one piece.

On the side facing away from the passage opening 12, the expandable part 23 forms with the support part 21 an intermediate pressure chamber 22. The expandable part 23 can be double-walled in the area of the pressure chamber, one wall being fixed to the support part 21 is connected and the walls enclose the pressure chamber. The pressure chamber 22 extends predominantly on the circumferential half of the support body 2, which faces away from the passage opening 12. But it can also form annular peripheral parts at the ends 37, 38 of the support body, which act as axial seals. These areas can be formed by circumferential grooves 29 or beads in the support part 21, the edges of which are firmly connected to the expandable part 23.

After the sewer pipe 1 and the sewer connection 10 are switched off by the renovation device, the damaged areas 4 are introduced and pressed via filler openings 3 filler material m. The filler openings 3 are preferably located in the area of the bladder 11, but can also be distributed in the circumferential direction and in the longitudinal direction and can be controlled differently.

After stripping, there is often air, water or other liquids in the damaged areas 4. These can escape through ventilation openings 8 which are arranged in the region of the filler openings 3.

If there are several damaged areas 4 distributed over the circumference in the sewer pipe 1 which are not connected by cracks, these can be repaired with several filler openings 3 distributed over the support body 2. A distributor pocket 6 and distributor grooves 7 can also be integrated in the support body 2 or introduced into the wall of the sewer pipe 1, the damaged areas 4 being connected to one another by distributor grooves 7. Existing larger damaged areas 4 can often be used at least in part as a distribution pocket 6.

After stripping the sewer pipe 1 and the sewer branch 10, the pressed-in filling material is distributed under pressure along the distributor grooves 7 and fills them and the damaged areas 4. Since the support body 2 is flush with the wall of the sewer pipe 1 and the sewer connection 10, the original flow cross sections are essentially retained after the refurbishment.

If sewer pipes 1 have to be renovated in winter, the problem frequently arises that the filling compound cures only slowly or poorly as a result of lower temperatures. In order to accelerate curing or to use the renovation device in winter, the support body 2 and / or the bladder 11 can be heated. This can be achieved with electrical, pneumatic or hydraulic heating elements 33, which are located below the surface 30, 31 of the support body 2 and the bladder 11. The heating elements 33 are preferably formed by spiral-shaped channels which enter the support body 2 and / or the bladder 11 lead in and out and can be connected to a closed cycle. Water is advantageously used as the heating medium, which has a good heat transfer coefficient and is environmentally compatible in the event of possible damage.

Claims

19 n 19 patent claims

1. Renovation device for the renovation of sewer pipes (1) with a tubular, in the sewer pipe (1) movable support body (2), which is under an internal pressure to the

Has channel wall, expandable rubber-elastic part (23), an inner, stiffer and with the part (23) connected to the support part (21) and a bladder (11) which can be introduced into a channel connection (10) or a channel branch, wherein through filler openings (3) filler material is supplied to damaged areas (4) which are sealed by the support body (2), characterized in that the supporting part (21) has an outer contour (5) adapted to the sewer pipe (1) and changes from a radius of curvature - Derbaren, substantially semi-cylindrical shell (24) is formed, the outer lateral surface with the expandable part (23) is firmly and tightly connected at least in the region of a passage opening (12) which is provided for the separately arranged bladder (11).

2. Refurbishment device according to the preamble of claim 1, characterized in that the supporting part (21) is formed by a cylindrical shell (24, 25) made of resilient material with an elliptical cross-section and the passage opening (12) for the bladder ( 11) lies in a central axial region and in a circumferential region with a large radius of curvature, the expandable part (23) of the support body (2) being sealed to the supporting part at least in the region of the passage opening (12) and at the ends (37, 38) (21) is connected and forms a pressure chamber (22) on the circumferential side facing away from the passage opening (12) with the supporting part (21).

3. Renovation device according to claim 1 or 2, characterized in that the pressure chamber (22) at the ends (37, 38) of the support body (2) forms an annular space (29).

4. Renovation device according to one of claims 1 to 3, characterized in that the supporting part (21) and the expandable part (23) are formed together in one piece.

5. Renovation device according to one of claims 1 to 4, characterized in that the expandable part (23) is expanded with water pressure.

6. Renovation device according to claim 2, characterized in that the supporting part (21) consists of two axially extending half-shells (24, 25) which are connected to one another with the longitudinal sides (39, 40) of their concave, facing inner surfaces and bend elastically under an external load.

7. Renovation device according to claim 6, characterized in that the shells (24, 25) are connected to one another in an articulated manner.

8. Rehabilitation device according to one of the preceding claims, characterized in that there is a distributor pocket (6) between the support body (2) and the sewer pipe (1) in the region of the filler opening (3).

9. Refurbishment device according to claim 8, characterized in that from the distributor pocket (6) distributor grooves (7) lead to various damage points (4) in the region of the support body (2).

10. Rehabilitation device according to claim 8 or 9, characterized in that the distributor pocket (6) and / or the distributor grooves (7) are in the wall of the sewer pipe (1).

11. Rehabilitation device according to one of the preceding claims, characterized in that the support body (2) has at least two filler openings (3) in the longitudinal direction and / or in the circumferential direction, which can be controlled individually and in various combinations.

12. Renovation device according to one of the preceding claims, characterized in that there are ventilation openings (8) in the region of the filler material openings (3).

13. Renovation device according to one of the preceding claims, characterized in that the bladder (11) can be rolled up.

14. Rehabilitation device according to claim 13, characterized in that the bladder (11) is cylindrical and at the bladder end (43) is more stretchable than on its inner part.

15. Renovation device according to claim 13 or 14, characterized in that the bladder (11) in the central region has longitudinal grooves (41), knobs (42) or the like Absancsmittel-.

16. Rehabilitation device according to one of claims 13 to 15, characterized in that the bladder (11) in the region (17) of the joint (18) of the sewer pipe (1) and the sewer branching (10) is reinforced.

17. Refurbishment device according to one of the preceding claims, characterized in that the passage opening (12) in the support body (2) can be closed by a cover (20).

18. Rehabilitation device according to one of the preceding claims, characterized in that a camera (34) and a light source (25) are arranged in the immediate vicinity next to the bladder (11) in the support body (2) and the camera (34) including the bladder ( 11) and the light source (35) can be moved until the camera (34) and the light source (35) are located under the opening (12).

19. Rehabilitation device according to one of the preceding claims, characterized in that the support body (2) has spring-loaded guide wheels (15) at both ends (13, 14).

20. Rehabilitation device according to one of the preceding claims, characterized in that the support body (2) and / or the bladder (11) can be heated by a heating element (33) which is flowed through by a heated medium under the support body surface (30) and / or the bladder surface (31).

21. Renovation method with a renovation device according to one of the preceding claims, characterized in that the support body (2) with its passage opening (12) on the damaged areas (4) or the channel connection (10) is aligned, the expandable part (23) of the Support body (2) is pressurized, the bladder (11) is introduced into the channel connection (10) and is acted upon with a low pressure to such an extent that at least the end of the bladder (43) comes into sealing contact in the channel connection (10) a pre-pressure is pressed in until it has reached all damaged areas (4), - the bladder (11) is subjected to the final pressure and

Filling compound is pressed with the final pressure.