DE102017118140A1 - Packer arrangement with operating method and assembly method - Google Patents

Abstract

A packer assembly (2) for internally machining a tube (30), comprising a carrier (4) with an expandable longitudinal portion (8a), and a cap (10) which pockets the carrier (4) at least longitudinally beyond a first longitudinal end wherein the cap (10) and the carrier (4) form a chamber between them, and the carrier (4) in the region of the chamber has an outlet opening (16) to fill the chamber with a pressure medium (14).
In a method of operating the latter, it is introduced into the tube (30) at a destination (Z) which radially expands the carrier (4) in the longitudinal section (8b), the cap (10) between carrier (4) and inner wall (FIG. 32), thereby sealing the chamber (18), and directing the pressure medium (14) into the chamber (34) to fill it.
In a method of assembling a liner (42) on an inner wall (32) of a pipe (30), the liner (42) is placed radially outward on the cap (10) and the liner (42) is applied to the inner wall (FIG. 32) of the tube (30) pressed to assemble them.

Description

The invention relates to a packer assembly for internal machining of a pipe, a method of operating a packer assembly, and a method of mounting a liner to an inner wall of a pipe.

So-called packers are used for internal machining of pipes. For example, they serve for sealing and / or interior renovation of pipelines. A special application is the interior renovation of sewage pipes with branching branch pipes. A problem here is the lining of the transition region between a main sewage pipe and a branch pipe opening into the main pipe.

For example, is from the DE 10 2010 053 113 A1 a packer for lining the transition region between a main sewage pipe and in the main pipe opening house connection pipe known. The packer includes a support tube and two elastic sheath, which are arranged one above the other and connected end-to-end. The outer jacket has a hat-shaped attachment. During pipe rehabilitation, the attachment projects into the house connection pipe and puffs up there.

Object of the present invention is to improve the internal machining of a pipe.

The object is achieved by a packer assembly according to claim 1 for the internal machining of a pipe. Preferred or advantageous embodiments of the invention and other categories of invention will become apparent from the other claims, the following description and the accompanying drawings.

The packer assembly includes a carrier. The carrier extends along a longitudinal axis. The longitudinal axis runs through or within the carrier. The carrier has a longitudinal section. At least in the longitudinal section, the carrier is expandable (and contractible) in a radial direction with respect to the longitudinal axis. The expansion can take place here to varying degrees. The expansion can be motorized, hydraulic, pneumatic or otherwise. The carrier (in the form of a fillable bladder, etc.) may also initially have a negative pressure relative to the environment. The expansion can then take place by approaching the ambient pressure. For this purpose, in particular the residual stress of the carrier, which at normal pressure and force-free, e.g. a certain predetermined shape, e.g. has a cylindrical shape. A negative pressure may e.g. by mechanically compressing a carrier with an open valve in the carrier and closing the valve with compressed carrier. If the external compression force is then removed, the carrier wants to unfold again because of its inherent stability. In this case, a negative pressure is generated in the carrier.

The packer assembly includes a cap. The cap also extends along the longitudinal axis. The cap surrounds the carrier at least from the longitudinal section beyond the first longitudinal end pocket-like closed radially outside, that is, it is outside the carrier and at least part of the carrier with the first longitudinal end pocket-like in itself or is slipped over this.

The cap and the carrier are executed from the longitudinal portion to the longitudinal end towards a pressure medium. Between them they form a sealable at the longitudinal end chamber or a jacket portion which is sealable at the longitudinal end to a chamber.

The cap extends at least partially into the longitudinal portion, so that a sufficient sealing effect between the carrier and the cap is achieved, as will be described in detail below. Preferably, the cap also extends completely over the longitudinal portion or beyond.

Both the cap and the carrier are in the region of the chamber to be formed or formed tight against the printing medium. The tightness in this case extends at least so far that a pressure build-up within the chamber - possibly under Nachströmung of pressure medium - is possible, as will be described below.

The carrier has an outlet opening open towards the chamber in the region of the chamber. Through the outlet opening, pressure medium can therefore flow out of the carrier or, as it were, out of the carrier. In particular, however, the outlet opening does not communicate with the carrier interior. The pressure medium can thus flow into the chamber or fill it, the chamber between (the sufficiently pressure-tight portions of) carrier and cap is formed.

By directed in the radial direction expandability of the longitudinal section of this can be expanded in a pipe to be machined and thus pressed against the inner wall when the packer assembly is inserted into the tube. Thus, the cap is pressed there close to the carrier and sealed in the region of the longitudinal portion in the circumferential direction relative to the carrier. This results in an end-side closure of the pot-shaped shell region in the region of the longitudinal section. This results in the chamber between the carrier and Cap which extends in the region from the longitudinal section to beyond the first longitudinal end and out to there. The outlet then serves to supply the pressure medium in the chamber. The pressure medium is in particular compressed air, but may also be any other pressure medium, for example a fluid or another gas.

The cap surrounds the carrier, in particular in the form of a tube or jacket which is closed on one side, in particular the cap is a forend tube. The fillable or sealed jacket region in the form of the chamber thus ends in each case at or in the region of the longitudinal section. The chamber can be pressurized to press against itself (with the cap) against structures inside the pipe, etc., or, in particular, to extend from a branch pipe into a main pipe into which the branch pipe opens. The expansion of the longitudinal section and the filling or pressurization of the chamber are independent of each other.

The packer assembly has a few items, in particular only the carrier and a single simple tubular or jacket-shaped cap and is therefore easy and inexpensive to implement.

The cap thus forms a bag or closed on one side shell or is designed blind hole shape. The chamber is thus formed at least in the expansion state of the carrier when it rests sealingly from the inside to the cap. The chamber thus created by sealing the longitudinal section by conditioning the wearer to the cap. In this respect, the chamber is sealable by pressing the cap and the carrier against each other. The chamber is thus created by sealing the jacket area. The cap is in particular made in one piece.

In a preferred embodiment, the outlet opening is arranged at the first longitudinal end of the carrier. Especially at the local end face, especially there centrally. This is a particularly simple location for mounting an outlet port, as e.g. a commercial bubble for pipe inspection has an opening there anyway. In addition, there is a favorable place for the inflow of the medium into the chamber, since these there usually already has a cavity by not fitment of the cap on the carrier.

In a preferred embodiment, the cap surrounds the carrier loosely. "Lose" means in particular that the cap is not permanently or permanently or permanently attached to the carrier, in particular not materially secured, not glued or is not jammed between structural parts of the carrier or the like. At best, the cap is e.g. held by frictional engagement between the cap and the carrier on the carrier when the cap is applied to the carrier or pressed between the carrier and the inner wall of a tube. The frictional engagement or the (temporary) attachment is also e.g. only for certain operating conditions, for example when the longitudinal sections have already expanded to some degree out of a contraction state. This is done as explained above, e.g. by filling the carrier with a certain overpressure relative to the environment, but also by pressure increase in the direction or up to ambient pressure in a previously at least partially evacuated cap. The cap can thus be easily removed (at least with sufficient contraction of the longitudinal sections from the carrier or applied thereto, in order to be replaced, for example, in the event of wear.) Special fastening means and corresponding fastening steps, such as gluing or jamming, are eliminated in the manufacture of the packer arrangement.

In a preferred embodiment, the cap is a flexible and / or stretchable cap. Thus, the cap can be particularly easy or well applied to the carrier or removed and follow an expansion of the carrier on the longitudinal sections particularly well. Also, the cap is held by stretching through the expanded longitudinal sections by means of frictional engagement on the carrier. The cap is made, for example, from a rubber material or contains such.

In a preferred embodiment, the cap in a ground state has a basic shape, wherein in the basic form along the longitudinal axis has a constant cross-section transverse to the longitudinal axis. In particular, the ground state is one when the cap is held on the carrier without the carrier being expanded and / or when the cap is not expanded. The basic form is, for example, those of a cylinder jacket with a one-sided bottom, in particular a straight circular cylinder jacket. In the ground state, the cap is force-free, in particular with respect to stretching, for example, placed on the cylindrical support only loosely, but touching or slipped.

The cap thus has no indentations or protuberances, indentations or protrusions, extensions or the like. In particular, for bendable, and / or elastic and / or stretchable cap, etc., that the cross-sectional view is in a basic form, when the cap is held in the basic form or is in an imaginary ideal basic shape, in which it is theoretically engageable, for Example on the carrier.

Such a cap is particularly simple and inexpensive available or producible, for example in the form of a tube with a constant cross-section or over the length of constant transverse dimensions and integrally formed or integrally contained soil.

In a preferred variant of this embodiment, the cap is therefore a forend tube for the wearer. A corresponding forend tube is particularly simple and inexpensive available or produced.

In a preferred embodiment, the carrier - together with the cap - a first expansion state or can be brought into such, in which the longitudinal portion has a first cross-section. In the first state of expansion, the cap is frictionally engaged on the longitudinal section. The state of expansion can again be one in which the carrier has a certain negative pressure with respect to the environment. The carrier is also in the longitudinal section, now together with the cap, expandable from the first to a second expansion state (by overpressure and / or by increasing from a negative pressure in the direction of normal pressure, possibly beyond this). Now, the longitudinal section (carrier and cap) has a second cross section which is larger than the first cross section. In particular, the carrier with cap in the first state of expansion can be introduced into a tube, wherein the first cross section of the carrier with cap is smaller than the inner cross section of the tube. The second expansion state with the larger second cross section is then dimensioned so that it is (without the tube) larger than the inner cross section of the tube, so that in the tube (where the expansion is limited to the inner cross section of the tube) an investment of the longitudinal sections with cap below Pressure on the inner wall of the tube takes place.

The dimensions of the packer arrangement are matched to the dimensions of a particular tube in which the packer or carrier is to be used, or the packer arrangement is suitable for such a tube.

Thus, the packer assembly with frictionally held cap is securely insertable into the tube in a given configuration and can then be expanded sufficiently in the tube to compress the cap between the carrier and tube inner wall to form the expandable chamber as discussed above. In the first state of expansion in particular the cap is elastically minimal to slightly stretched. In particular, this is the cap - at least in the region of the longitudinal section - made stretchable.

In a preferred embodiment, the carrier contains at least one flexible and / or expandable inflatable body. The inflatable body can be filled with a pressure medium via a first media connection, the expandability being or being effected at least in the longitudinal section due to the fillability with pressure medium and / or the at least partial evacuation below the ambient pressure. The pressure medium may in this case be the same or different than the above-mentioned pressure medium for the outlet opening. The first media connection is located, in particular, on the packer arrangement, in particular on a second longitudinal end or front end, viewed in the longitudinal axis direction, with respect to the first longitudinal end. Alternatively, a connecting line communicating with the inflatable body projects out of the packer arrangement up to a first media connection located outside the packer arrangement. By a swelling body, a corresponding expandability can be ensured particularly easy.

In a preferred variant of this embodiment, a feed line to the outlet opening through at least one of the inflatable body, i. the supply line is connected at a first end to the outlet opening. At the other, the outlet opening opposite the second end, the feed line opens into a second media port of the carrier. Thus, pressure medium can be conducted into the chamber or the jacket area between the carrier and the cap via the second media connection. Here, too, the second media connection is located either on the packer arrangement or on the carrier, in particular on its second longitudinal end or front end, or the connection line projects out of the packer arrangement and leads up to an external second media connection. In particular, the outlet opening is also provided or provided on the at least one inflatable body. This results in a particularly simple to construct and low-producing inflatable body assembly for the packer assembly, which ensures both the expandability of the longitudinal sections and the fillability of the jacket area with the pressure medium.

In a preferred variant of this embodiment, the carrier contains an inflatable body extending over the entire carrier. In other words, the (at least almost) entire carrier is designed as an inflatable body, in particular as a single inflatable body with a single inflation chamber. The inflatable body then has in particular a one-piece jacket. In addition to the inflatable body, the carrier then only has, for example, functional elements such as, for example, the media feeds and an insert with the outlet opening and its internal supply line. Optionally, other elements, for example a drawbar eye, are provided on the inflatable body to form the carrier. The carrier is then in particular a conventional packer or Inflation tube with a bypass outlet, which serves as an outlet.

In this respect, the invention also relates to the use of a conventional packer as a carrier in the packer arrangement.

The object of the invention is also achieved by a method according to claim 11 for operating a packer arrangement in which an inventive (matched to a particular pipe or suitable for this pipe) packer assembly along the longitudinal axis with its first longitudinal end ahead in the pipe to a destination introduced, in particular up to this advanced or preferred is. The carrier is radially expanded in the longitudinal section until it bears in the longitudinal section with a contact pressure against the inner wall of the tube. Here, in the region of the longitudinal section, the cap is pressed by the contact pressure between the carrier and the inner wall. As a result, the jacket region between the cap and the carrier is sealed in the region of the longitudinal section to form a chamber or the chamber is sealed. The pressure medium is then passed into the chamber via the outlet opening to fill it.

The filling of the chamber then leads, depending on the tube, for example, to a local pressure build-up against the tube inner wall in the region of the chamber or to a further expansion of the cap, if the tube provides space for this. Thus, with the particularly simple packer arrangement particularly easy desired work can be performed in the pipe.

The method and at least part of its embodiments as well as the respective advantages have been explained analogously already in connection with the packer arrangement according to the invention.

In a preferred embodiment, the packer arrangement is introduced into a tube which widens in the insertion direction beyond a narrow section into a wide section. The destination is chosen so that at least part of the chamber is in the wide section. By filling the chamber with the pressure medium, the cap is expanded radially outward into the wide section. Thus, it can be achieved that despite the very simple packer arrangement, in particular with a tubular cap, an expansion of the packer in pipe openings main pipes, extensions, etc. in, that is radially outward, can be done to perform there appropriate work. Also, an expansion in the direction of the longitudinal axis beyond the first longitudinal end is possible to fill in the tube "before" the packer array lying areas with the inflated cap or to expand into it.

In a preferred embodiment, the packer assembly is introduced into a pipe which is a branch pipe of a main pipe, wherein the branch pipe has the narrow portion and the main pipe has the wide portion. The longitudinal section is thus expanded in the branch pipe. The cap is expanded into the main tube. Thus, it is possible to work with the simple packer arrangement also junctions of branch pipes or adjoining the junction pipe sections of the branch pipe from the inside and especially from the branch pipe ago using the expanded cap.

In a preferred embodiment, the carrier is provided with the cap prior to insertion into the tube. For this purpose, in particular the carrier is initially compressed from its normal state (without pressure and power) with respect to the environment, e.g. (Partially) evacuated. The cap is then applied and the carrier re-expanded, e.g. at least partially filled in the direction or up to the ambient pressure or beyond. The carrier is then brought into the above-mentioned first expansion state, wherein the packer arrangement thereby has a first cross section smaller than the inner cross section of the tube. The packer assembly is then inserted into the tube. At the destination, the packer assembly is brought into the second expansion state to apply the longitudinal sections with the contact pressure on the inner wall of the tube, wherein the second expansion state (without tube) would have a second cross section larger than the inner cross section of the tube. Although the correspondingly larger second cross section can not be achieved in the tube, the cap or carrier then bears against the inner wall of the tube with pressure. Subsequently, as already explained above, the chamber is filled with pressure, in particular to carry out the above-mentioned machining operations on the pipe.

The object is also achieved by a method according to claim 15 for mounting a lining on an inner wall of a pipe. The lining is placed radially on the outside - in particular in the region of the later forming chamber - on the cap of the packer assembly according to the invention. The liner is then pressed against the inner wall of the tube by the packer assembly operating method of the present invention to mount the liner to the inner wall. In particular, the packer assembly is mounted so that the chamber is formed in the desired area in which the lining rests.

In particular, a lining can thus also at a branch pipe or its junction from the branch pipe or at another pipe opening, for example a bulge of the Pipe are attached. The lining is in particular a tissue provided with adhesive, the assembly of which is effected by pressing against the tube inner wall.

In other words, it is possible, in particular with the aid of the packer arrangement according to the invention and its operating method, to carry out conventional inner wall workings and inner wall linings on pipes. This is done with the particularly simple method and the particularly simple packer arrangement according to the invention.

The invention is based on the following findings, observations or considerations and still has the following embodiments. The embodiments are also called simplifying the "invention". In this case, the embodiments may also contain or correspond to parts or combinations of the abovementioned embodiments and / or optionally also include previously not mentioned embodiments.

According to the invention results from the pressurization of a carrier, which may also be designed as a main packer, and the pressurization of a formed in the shell region between the carrier and cap chamber or the cap, which can also be referred to as forend tube, an expansion of the cap (of Stulpschlauches) radially outward and along the longitudinal axis "forward", ie in the direction beyond the first longitudinal end. The expansion takes place in particular in an extension of the pipe, in particular from an opening of a branch pipe or a piece into the main pipe.

The cap or forend tube is not connected to the carrier or the main packer, glued, etc. By radial pressing of the carrier (main packer) to the pipe inner wall, the tightness of the cap (forend tube) is generated. Via the outlet (outlet opening, bypass on the main packer), the packer arrangement (forend packer) allows expansion into the extension or the main pipe.

The packer assembly according to the invention is a straight packer, in particular with forend tube, for the inner lining of pipes. The carrier (main packer) is not glued to the ends of the cap (of the neck packer). The cap (the forend tube) is slipped over the normal packer (carrier) like a protective tube. Via the outlet valve (outlet opening) pressure can then be supplied to the expansible forend tube at the outlet (at the outlet opening) so that it (the chamber and thus the cap) expands. According to the invention, therefore, the cap is not adhered to the carrier, but it is only one piece.

A packer (carrier), whose interior communicates with the environment, is usually inherently stable and therefore always has air in its interior. This is e.g. This is the case with a packer that is not yet equipped with a valve or cap (front and / or rear). If you then at least partially evacuate the packer ("Vacuum pulls"), the packer will contract and will be so (especially extremely) small or thin. If the carrier (packer) is emptied by vacuuming, then the forend tube (cap) is applied, and then the vacuum is at least partially released again, the forend tube or cap keeps its position on the carrier even without its explicit expansion (overpressure in the carrier) , So you can use the cap without expansion pressure (overpressure with respect to the environment) and only by pulling the vacuum or fasten on the support.

• 1 eine Packeranordnung gemäß der Erfindung,
• 2 die Packeranordnung aus 1 bei der Auskleidung einer Innenwand eines Rohres,
• 3 eine alternative Packeranordnung.

Further features, effects and advantages of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. This shows in a schematic outline sketch:

• 1 a packer arrangement according to the invention,
• 2 the packer arrangement 1 in the lining of an inner wall of a pipe,
• 3 an alternative packer arrangement.

1 shows a packer arrangement 2 with a carrier 4 that extends along a longitudinal axis 6 and extends around it. The carrier 4 Here is a one-piece inflatable body, extending over the entire length of the packer assembly 2 extends. The carrier 4 has a longitudinal section 8th in which the carrier 4 in the direction indicated by arrows radial direction R is expandable. Here is even the entire carrier 4 substantially correspondingly expandable over its entire length.

The packer arrangement 2 also includes a cap 10 , which are also along the longitudinal axis 6 and extends around it, and that the wearer 4 shell-shaped radially outside and at the first longitudinal end, that is outside, surrounds. Both the cap 10 as well as the carrier 4 are in the range of the cap 10 close to a pressure medium 14 , here compressed air (only indicated) executed.

The carrier 4 points in the area of the cap 10 , here at the first longitudinal end 11a , one to the outside or to the cap 10 open outlet opening 16 for the print medium 14 on. Through the outlet opening 16 So can print medium 14 emanate and flows then in a jacket area 18 one that is between carrier 4 and cap 10 located. The cap 10 surrounds the carrier 4 Loose, that is, it is not glued or otherwise connected with this in any way. The cap 10 is flexible and elastic.

1 dashed line shows the carrier 4 in contracted condition and the cap 10 in a ground state G if this is unstretched and undeformed and loose on the wearer 4 rests and thus is in a basic form. For clarification, there is a gap between carriers 4 and cap 10 represented, which does not necessarily have to be present in this situation. Along the longitudinal axis 6 has the cap 10 this is a constant cross section Q0 on. The cross section Q0 here is a circular shape, the cap 10 in its basic form is therefore a forend tube in the form of a circular cylinder jacket with bottom.

The carrier 4 is also in the ground state G (also shown in dashed lines), in which the longitudinal section 8th in or against the radial direction R maximally contracted, ie not expanded. Alternatively, the carrier 4 in the ground state G evacuated to a pressure below the ambient pressure.

1 also shows undressed the carrier 4 in a first state of expansion E1 if its longitudinal section 8th in the radial direction R have expanded a bit. This is done by introducing positive pressure or by pressure in the direction of the ambient pressure or beyond. Also in the state of expansion E1 can the carrier 4 So still have a negative pressure relative to the environment. The longitudinal section 8th here has first cross sections Q1 on. In the first state of expansion E1 is the cap 10 already stretched and therefore already close and frictionally engaged on the longitudinal section 8th at. Here is the gap between cap 10 and carriers 4 actually shown only for clarity. In fact, the two parts touch each other touching.

In the example contains the carrier 4 a (single) flexible and elastic inflatable body 20 that has a first media connection 22 at the second longitudinal end 11b of the carrier 4 with the print medium 14 is fillable. As a result, the expandability of the longitudinal section 8th causes. A supply line 24 to the outlet opening 16 leads through the inflatable body 20 , The first end 23a the supply line 24 flows into the outlet opening 16 , At the outlet opening 16 opposite second end 23b opens the supply line 24 on a second media connection 26 ,

In the example contains the carrier 4 So a single inflatable body 20 moving in the direction of the longitudinal axis 6 over the entire carrier 4 extends. The inflatable body 20 is essentially with the media connections 22 and 26 , the supply line 24 and the outlet opening 16 Mistake.

2 shows again (this time dashed) carrier 4 and cap 10 in the state of expansion E1 , The carrier 4 is due to further supply of pressure medium 14 together with the cap 10 in a second expansion state E2 brought (shown pulled out). The longitudinal section 8a then have second cross sections Q2 on, the larger the cross sections Q1 are. Again, the gap is between cap 10 and carriers 4 and between cap 10 and pipe 30 shown for clarity only. In fact, the parts are touching each other or under pressure to each other.

2 also illustrates an operating method for the packer assembly 2 , In the method, the packer assembly 2 in the state of expansion E1 along the longitudinal axis 6 with its first longitudinal end 11a ahead in a tube 30 introduced and to a destination Z advanced. Subsequently, the carrier 4 in the radial direction R at its longitudinal section 8th expands until it is in the longitudinal section 8th with a contact pressure p (indirectly with interposition of the cap 10 ) on the inner wall 32 of the pipe 30 is applied. This corresponds to the expansion state E2 even if this is not taken dimensionally, since the tube expansion of the packer assembly 2 on the inner diameter of the tube 30 limited.

The cap 10 is in the expansion state E2 by a contact pressure p between carriers 4 and inner wall 32 pressed. This is the jacket area 18 in the region of the longitudinal section 8th between the cap 10 and the carrier 4 opposite the print medium 14 sealed, leaving a closed chamber 34 forms. The print medium 14 will now be over the outlet opening 16 in the chamber 34 or the jacket area 18 headed to the chamber 34 to fill.

The pipe 30 has a pipe opening 36 in his pipe wall. The destination Z is chosen so that part of the chamber 34 at the place of the pipe opening 36 lies, here through this protrudes. By filling the chamber 34 with the print medium 14 will the cap 10 forward in the direction of the longitudinal axis 6 through the pipe opening 36 expanded through. The pipe opening 36 Here is a junction of a branch pipe 40 in a main pipe 41 that together the pipe 30 form. The cap 10 So it's out of the branch pipe 40 out into the main pipe 41 into it expands.

The representation in 1 is to be inferred from the process that the carrier 4 in the ground state G before insertion into the tube 30 with the cap 10 is provided and in the first expansion state E1 is brought, wherein the first cross section Q1 smaller than the inner cross section of the pipe 30 is. Only then will the packer arrangement 2 in the pipe 30 brought in. Only at the destination Z becomes the packer assembly 2 in the second expansion state E2 brought to the longitudinal section 8th with the contact pressure p on the inner wall 32 of the pipe 30 to apply.

The indicated in the figures method is used for mounting a liner 42 on the inner wall 32 of the main pipe 41 and the inner wall 32 of the branch pipe 40 or for cladding the entire junction area of the branch pipe 40 in the main pipe 41 , The lining 42 is therefore according to 1 outside on the cap 10 the packer arrangement 2 hung up. This is done so that the lining is at the destination Z on the then forming chamber 34 to come to rest. With the help of according to 2 indicated method, namely the introduction and expansion of the carrier 4 and the expansion of the chamber 34 will the lining 42 to the inner wall 32 of the main pipe 41 and the branch pipe 40 pressed down to assemble them. The correspondingly further expanded cap 10 and thereby to the inner wall 32 pressed lining 42 is dotted symbolically represented.

After installation, the pressure medium 14 out of the chamber 34 and the carrier 4 drained and the packer assembly 2 out of the pipe 30 away.

3 shows a simplified simplified an alternative embodiment of a packer assembly 2 in an expansion state E1 , Here is the carrier 4 a body having a rigid body with movable elements. So is a longitudinal section 8th available here, the motor in the radial direction R are expandable. The cap 10 extends only over part of the longitudinal section 8th , The print medium 14 becomes the outlet opening 16 from the inside of the carrier 4 , here an indicated only gas cylinder at the median port 26 , fed.

LIST OF REFERENCE NUMBERS

2

packer assembly

4

carrier

6

longitudinal axis

8th

longitudinal section

10

cap

11a, b

longitudinal end

14

print media

16

outlet

18

cladding region

20

Inflation body

22

Media connection (first)

23a, b

End (the supply line)

24

supply

26

Media connection (second)

30

pipe

32

inner wall

34

chamber

36

tube opening

40

branch pipe

41

main pipe

42

lining

R

radial direction

G

ground state

Q0,1,2

cross-section

E1,2

expanded state

Z

destination

p

contact pressure

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102010053113 A1 [0003]

Claims (15)

Packer arrangement (2) for the internal machining of a tube (30), - with a along a longitudinal axis (6) extending support (4) having a longitudinal portion (8a), wherein the carrier (4) at least in the longitudinal portion in a radial direction (R ) is expandable to the longitudinal axis (6), wherein the carrier has a first longitudinal end, with which it is intended to introduce it into the tube, characterized in that the packer assembly (2) extending along the longitudinal axis (6) cap (10) contains the carrier (4) at least from the longitudinal portion beyond the first longitudinal end pocket-like closed radially outwardly surrounds, wherein the cap (10) and the carrier (4) from the longitudinal portion to the longitudinal end towards a pressure medium (14) are executed and between them forming a sealable chamber at the longitudinal end, and the support (4) in the region of the chamber has an outlet opening (16) open towards the chamber for the pressure medium (14) Fill the chamber with the pressure medium (14). Packer arrangement (2) according to Claim 1 , characterized in that the outlet opening is arranged at the first longitudinal end. Packer arrangement (2) according to one of the preceding claims, characterized in that the cap (10) loosely surrounds the carrier (4). Packer arrangement (2) according to one of the preceding claims, characterized in that the cap (10) is a flexible and / or stretchable cap (10). Packer arrangement (2) according to one of the preceding claims, characterized in that the cap (10) in a ground state (G) has a basic shape with along the longitudinal axis (6) of constant cross-section (Q0). Packer arrangement (2) according to Claim 5 , characterized in that the cap (10) is a forend tube. Packer arrangement (2) according to one of the preceding claims, characterized in that the carrier (4) with cap (10) in a first expansion state (E1) with the first cross-section (Q1) on the longitudinal portion (8a, b) can be brought, wherein the cap (10) in the first expansion state (E1) frictionally abuts the longitudinal section (8a, b) and the carrier (4) in the longitudinal section (8a, b) together with the cap (10) in a second expansion state (E2) with a larger second cross-section (Q2) is expandable. Packer arrangement (2) according to one of the preceding claims, characterized in that the carrier (4) comprises at least one flexible and / or expandable inflatable body (20) which can be filled via a first media port (22) with a pressure medium (14), wherein As a result, at least in the longitudinal sections (8a), the expandability is effected. Packer arrangement (2) according to Claim 8 , characterized in that a feed line (24) through at least one of the inflatable body (20) with its first end to the outlet opening (16), wherein the feed line (24) opens at its second end to a second media port (26) of the carrier. Packer arrangement (2) according to one of Claims 8 to 9 , characterized in that the carrier (4) comprises a over the entire support (4) extending inflatable body (20). Method for operating a packer arrangement (2), characterized in that - a packer arrangement (2) according to one of the Claims 1 to 10 along the longitudinal axis (6) with the first longitudinal end in advance into the tube (30) to a destination (Z) is introduced, - the carrier (4) in the longitudinal section (8b) is radially expanded until it in the longitudinal section (8a, b) with a contact pressure (p) on the inner wall (32) of the tube (30), wherein the cap (10) by the contact pressure (p) in the region of the longitudinal section (8a b) between the support (4) and inner wall (32) pressed is, whereby the chamber (18) between the cap (10) and the support (4) in the region of the longitudinal portion (8a, b) is sealed, the pressure medium (14) via the outlet opening (16) in the chamber (34) is passed to fill these. Method according to Claim 11 , characterized in that - the packer arrangement (2) is introduced into a tube (30) which widens in the insertion direction beyond a narrow section into a wide section, and the destination (Z) is selected so that at least a part of the chamber (34 ) is in the wide section, - by filling the chamber (34) with the pressure medium (14), the cap (10) is expanded radially outward into the wide section. Method according to Claim 12 , characterized in that - the packer assembly (2) is introduced into a pipe (30) which is a branch pipe (40) of a main pipe, the branch pipe having the narrow portion and the main pipe having the wide portion. Method according to one of Claims 11 to 13 combined with Claim 7 characterized in that - prior to introduction into the tube (30), the carrier (4) is provided with the cap (10), - the carrier (4) is brought into the first expansion state (E1), the packer arrangement (2 ) has a first cross section (Q1) smaller than the inner cross section of the tube (30), - the packer assembly (2) introduced into the tube (30) and transported to the destination, - the packer assembly (2) at the destination (Z) in the second expansion state (E1) is brought to apply the longitudinal sections (8a, b) with the contact pressure (p) on the inner wall (32) of the tube (30). Method for mounting a lining (42) on an inner wall (32) of a pipe (30), characterized in that - the lining (42) extends radially outwards onto the cap (10) of a packer arrangement (2) according to one of Claims 1 to 10 is applied, - the lining (42) by means of a method according to one of Claims 11 to 14 is pressed against the inner wall (32) of the tube (30) to assemble them.

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