DE102006005115A1 - Apparatus and method for cleaning the inside of a pipe - Google Patents

Abstract

zu einer am Düsenträger (6) quer zur Mittellängsachse der Vorrichtung (14) angreifenden Querkraft

addieren.
Bei einem Verfahren zur Innenreinigung eines Rohres (80, 98a, b) wird eine Zuleitung (4) für Reinigungsmittel eingeführt, wobei ein Düsenträger (6) an der Zuleitung (4) mindestens eine Reinigungsdüse (44b-e) und mindestens eine Gegendüse (46) umfasst, im Betrieb geben Reinigungsdüsen (44b-e) und Gegendüsen (46) Reinigungsmittel ab und erzeugen dabei Rückstoßkräfte

, wobei die Gegendüsen (46) so ausgerichtet und dimensioniert sind, dass sich die Rückstoßkräfte

zu einer am Düsenträger (6) quer zur Mittellängsachse (14) angreifenden Querkraft

addieren.A device (2) for internal cleaning of a pipe (80, 98a, b) comprises a supply line (4) for cleaning agents, a nozzle carrier (6) connected to the first end (22), at least one cleaning nozzle (44b-e) and at least a counter nozzle (46) is disposed for dispensing the detergent, the counter jets (46) being aligned (62a) and dimensioned to provide the recoil forces generated by the cleaning nozzles (44b-e) and counter jets (46) during operation

to a transverse force acting on the nozzle carrier (6) transversely to the central longitudinal axis of the device (14)

add.
In a method for internal cleaning of a pipe (80, 98a, b), a feed line (4) for cleaning agent is introduced, wherein a nozzle carrier (6) on the feed line (4) has at least one cleaning nozzle (44b-e) and at least one counter nozzle (46 In operation, cleaning nozzles (44b-e) and counter-nozzles (46) discharge cleaning agents, thereby generating recoil forces

, wherein the counter-nozzles (46) are aligned and dimensioned so that the recoil forces

to a transverse force acting on the nozzle carrier (6) transversely to the central longitudinal axis (14)

add.

Description

The The invention relates to an apparatus and a method for internal cleaning a pipe.

The Internal cleaning of pipes, ie piping, poses in many Areas of technology are a problem. In particular nuclear reactors have a variety of piping or piping systems from a multiplicity of branched pipelines, which partly radioactive Material, e.g. liquids transport.

Especially in so-called KANDU reactors are located in the immediate vicinity of the reactor core the so-called feeder pipes. These lead here as part of the primary circuit heavy water. These are about 400 curved pressure tubes, which all converge in a collector or branch from there. each Tube is this is about 15 m long at about 50 mm in diameter. These pressure tubes must from Time to time for cracks, material removal on the rough wall, etc. are checked. Before the actual test all must Pipes are decontaminated or cleaned.

such Pipe systems have so far, if at all, only by chemical Process be cleaned or decontaminated. Depending on the amount of to be removed during the cleaning of the inner lining on the pipes and the Composition of the removed deposits resulted here very high levels of secondary waste, e.g. a mixture of contaminated substances and cleaning agents. Furthermore eventually had to drain all the heavy and therefore expensive water become. Such cleaning is therefore time consuming and expensive.

As a general rule For pipe cleaning inside a high-pressure water jet technology is known. The hangs Cleaning effect strong from the distance of the high pressure water jet emitting nozzle from the body to be cleaned from. When exceeded a maximum distance at given water pressure finds no cleaning more instead. So far, it has been common at different sizes of pipes with different nozzle heads too work, which each have a defined distance of the cleaning nozzle to the pipe inner wall ensured. Each change a nozzle head is involved here consuming. Nozzle heads that narrower pipe sections downstream expanded in diameter Can clean pipe sections, are - if anything available - elaborate and expensive.

task It is the object of the present invention to provide an improved device and to predefine an improved method of interior cleaning of a pipe.

Regarding the device, the object is achieved by a device for Internal cleaning of a pipe, with one in a pipe to be cleaned along its central longitudinal axis insertable with a first end Supply line for Detergent with a nozzle holder connected to the first end the at least one re their jet direction transverse to the central longitudinal axis aligned cleaning nozzle and at least a counter nozzle arranged to deliver the detergent, the counter-nozzles aligned and are dimensioned that of cleaning nozzles and against nozzle in operation by outflowing Detergent generated recoil forces to a across the nozzle carrier to the central longitudinal axis add attacking shear force.

The Invention is based on the idea of high pressure water jet technology to improve when using inside a pipe and uses the Realizing that one for the pipe inside cleaning effective distance from the cleaning nozzle to the pipe inner wall over recoil forces of the outflowing Cleaning agent can be adjusted.

Therefore, according to the invention not only one or more cleaning nozzles arranged on the nozzle carrier, but beyond also one or more counter jets. All these nozzles are supplied with cleaning agent and spray it. Create this all nozzles Recoil forces. These are from the dimensioning of the respective nozzle, i. how much detergent emanates from the counter nozzle, and their orientation, ie the beam direction of the radiated from the nozzle Cleaning agent dependent.

The cleaning nozzles Here are usually dimensioned for optimal cleaning effect. The of the cleaning nozzles generated recoil forces are on Reason their arrangement, so known alignment and dimensioning. The counter jets will therefore be adjusted accordingly. By appropriate dimensioning these are deliberately generated by the counter jets recoil forces. The counter jets can so at given cleaning nozzles be arranged so that all recoil forces acting on one of the nozzle carrier Add shear force.

None the nozzles have to controllable, neither in the flow rate nor in your beam direction be. The lateral force results solely from their dimensioning.

For the sake of simplicity, the following is always spoken of a cleaning nozzle and a counter nozzle representative of a single or a plurality of these. The forces mentioned are always in the sense of a single or the sum of meh sub-forces, depending on how many nozzles actually exist.

The entire device, namely the tubular ones Supply line for Detergent and the attached nozzle carrier is with its central longitudinal axis usually approximately parallel to the central longitudinal axis of the to be cleaned Tube run. Thus, the lateral force acts transversely to the central longitudinal axis of the Arrangement, it also acts essentially transversely to the central longitudinal axis of the pipe and thus to the pipe inner wall.

The Querkraft attacks due to the rigid arrangement of all nozzles on the body also always at a fixed circumferential position of the main body or the device at. The device is thus always with the same circumferential position deflected towards the inner tube wall. There, the cleaning nozzles are arranged be, because this causes a deflection of the cleaning nozzles for Pipe inner wall out.

Of the Distance of the cleaning nozzles to the pipe wall is so independent kept small by the pipe diameter and the effluent from the cleaning nozzle cleaning agent actually unfolds cleaning effect when hitting the pipe wall. As a rule, the cleaning nozzles are arranged in this way be that in operation with their beam directions on the shortest Path are aligned towards the pipe inner wall.

requirement therefor is merely that the supply line is flexible enough to a deflection of the nozzle carrier due to enable the lateral force. Since the supply line must be flexible anyway, in order to pipe bends follow this, even beyond a bottleneck gives the nozzle carrier enough freedom of movement, to get over to move the shear force towards the pipe wall.

With The device is thus a cleaning of pipes with different, or in its course allows variable inside diameters, without, for example, a nozzle head must be replaced. The outer diameter of the entire device, So the supply line, the nozzle carrier, etc. can be chosen like that be that the device also through the narrowest parts of the Piping system out can be. Crucial for this This is usually the maximum outside diameter of hose and nozzle holder in one Plane perpendicular to the central longitudinal axis the device is smaller than the smallest inner diameter of the Piping system in a plane perpendicular to the central longitudinal axis of the pipe.

The Transverse force may be on the nozzle carrier in the direction be directed to the mean beam direction of all cleaning nozzles. The middle Beam direction of all cleaning nozzles is here defined in such a way that contrary to this direction the resulting Recoil force of all cleaning nozzles is directed. Since it is a recoil force, it moves the nozzle carrier together with the cleaning nozzles straight against the beam direction, ie away from the pipe wall. accesses the shear force exactly opposite to this direction, namely in Direction of the central jet direction of all cleaning nozzles, so they are moved back to the pipe wall to be cleaned, which leads to a further improvement of the cleaning effect.

Two cleaning nozzles can with an angular offset in a plane perpendicular to the central longitudinal axis arranged on the nozzle carrier be. These thus also cause the corresponding angle staggered recoil forces, which attack the nozzle carrier. Due to the angular offset, the two recoil forces of the two cleaning nozzles partially lift against each other. The counter nozzle Thus, only the not yet compensated part of the resulting Recoil force of the two Overcome cleaning nozzles, to generate a lateral force, the cleaning nozzles again moved towards the pipe wall.

By the arrangement of the nozzles in a plane perpendicular to the central longitudinal axis also act on the nozzle holder no Tensile or shear forces in the direction of the central longitudinal axis. Thus, the nozzle carrier or the entire device is not otherwise at a particular longitudinal position kept in the tube.

Of the Angular misalignment can be 0 ° to 170 °, depending on the application. Between 60 ° and 80 ° this leads in particular to a particularly favorable cleaning effect of cleaning nozzles on the pipe inner wall, with the recoil forces already to a large extent cancel.

The cleaning nozzles can arranged in pairs in staggered planes perpendicular to the central longitudinal axis be. The cleaning effect of the device is thereby enhanced because several cleaning nozzles are directed to the inner wall of the tube. This will be in the direction seen the middle longitudinal axis, a larger pipe section effectively cleaned.

The nozzle carrier can be connected to the supply line in a rotationally fixed manner with respect to the central longitudinal axis. As a result, the nozzle carrier and, with it, the cleaning nozzles within the tube can be turned particularly easily around the central longitudinal axis, in which the supply line is rotated outside the tube. By the rotation of the nozzle carrier and thus the cleaning nozzles again In order to clean the pipe on the entire inner circumference. The transverse force then rotates together with the nozzle carrier and, even during rotation, causes the nozzle carrier to be moved in the direction of the cleaning nozzles, ie, ahead of them, and thus toward the tube wall.

The the supply line facing away from the nozzle carrier may be shaped so that it tapers conically to a point. In other words thus the end of the device which is inserted into the tube ahead, conically tapered. Narrowing in the pipe can thus easily overcome be, because the conical rejuvenation a ramp for obstacles represents. The entire device then fails to hit the obstacle but glides over this away.

The Tip can within the projection surface of the nozzle carrier along the central longitudinal axis and eccentric outside the central longitudinal axis lie. Looking in the direction of the central longitudinal axis on the top of the Nozzle carrier, so does not protrude laterally the cross section of the device addition. The outer circumference or cross section the device is not enlarged thereby. By rotation of the tip so can the tip in different relative positions to the pipe inner wall be brought to avoid different obstacles.

The Lace can be on the outer edge the projection surface lie. As a result, the ramp is from the top to the opposite Maximum circumferential position of the device.

The Tip can be at the same circumferential position of the nozzle carrier as the counter nozzle be arranged. Because the counter nozzle the nozzle holder on her opposite Side toward the pipe inner wall moves to, is the top of the nozzle carrier so as far as possible removed from the pipe inner wall. Projecting from the pipe inner wall Obstacles are thereby from the tip or to this subsequent Overflow ramp overcome.

Of the Nozzle carrier can one the nozzles carrying body and one on this solvable include attached end cap. For one thing, so the device easily assembled or disassembled for maintenance. To the others are different end caps, e.g. for different pipes or Pipe systems, on the body fixable. Also nozzles can accordingly easily exchanged and so realized different recoil, or shear forces become.

The End cap may have a tip as explained in detail above. Again, that is true thus by Endkappenwechsel different formations of the tip for different Pipes or pipe systems can be mounted on the device.

The Detergent may be water. Especially when cleaning of contaminated pipes in the above-mentioned Kernre actuator thus become no special cleaning solutions or similar needed. The waste dissolved from the pipe inner wall as well the water can easily filtered out of the heavy water in the pipes become. The very expensive heavy water does not need to be disposed of become.

• – in ein zu reinigendes Rohr wird eine Zuleitung für Reinigungsmittel entlang ihrer Mittellängsachse mit einem ersten Ende voran eingeführt, wobei am ersten Ende ein Düsenträger angeschlossen ist, an dem mindestens eine bezüglich ihrer Strahlrichtung quer zur Mittellängsachse ausgerichtete Reinigungsdüse und mindestens eine Gegendüse angeordnet sind,
• – im Betrieb geben Reinigungsdüsen und Gegendüsen Reinigungsmittel ab und erzeugen dabei Rückstoßkräfte, wobei die Gegendüsen so ausgerichtet und dimensioniert sind, dass sich die Rückstoßkräfte zu einer am Düsenträger quer zur Mittellängsachse angreifenden Querkraft addieren.

With regard to the method, the object is achieved by a method for the internal cleaning of a tube, with the following steps:

• In a pipe to be cleaned, a feed line for cleaning agent is introduced along its central longitudinal axis with a first end, wherein at the first end a nozzle carrier is connected to which at least one with respect to their beam direction aligned transversely to the central longitudinal axis aligned cleaning nozzle and at least one counter nozzle,
• - In operation, cleaning nozzles and counter-nozzles give off cleaning agents and thereby generate recoil forces, the counter-nozzles being aligned and dimensioned so that the recoil forces add up to a transverse force acting on the nozzle carrier transverse to the central longitudinal axis.

The inventive method has already been in connection with the device according to the invention explained. Here again it should be explicitly pointed out that the cross to the Center longitudinal axis of the Supply line or the nozzle carrier oriented transverse force also essentially transversely to the central longitudinal axis of the to be cleaned Pipe lies. Reason for this is that at launch from supply line and nozzle carrier in the Automatically pipes the center longitudinal axis of the device into approximately parallel to the central longitudinal axis aligns the pipe. Reason for this in turn is the limited flexibility the supply line in the form of a hose, which is generally a high-pressure hose. This is usually just flexible enough to pipe bends too follow, but otherwise no entanglements or the like inside the tube to build.

Of the Nozzle carrier can together with the nozzles one to the central longitudinal axis parallel in the area of the nozzle carrier Axis are rotated. Since, as just explained, the central longitudinal axis of the nozzle carrier in essentially the central longitudinal axis corresponds to the tube, then rotate the nozzles attached to the nozzle carrier also around the central longitudinal axis of the Pipe, leaving the pipe on its inner wall on the entire perimeter is cleaned.

is the nozzle holder rotationally fixed attached to the supply line, the nozzle carrier by rotation of the supply line be rotated. As described above, this is a special easy way of Rotation of the nozzle carrier and so that the inner pipe cleaning on the entire pipe inner circumference is because the supply line outside of the tube simply and inexpensively rotated by a suitable device can be. A rotary drive in the field of arrangement, the is inserted inside the tube, is superfluous.

Of the Angle of rotation of the nozzle carrier can are detected during its rotation. By detecting the angle of rotation of the nozzle carrier is also the current angle of rotation of the cleaning and counter jets and thus the rotation angle of the currently acting lateral force known. in the To be cleaned pipe thus the nozzle carrier targeted to any Circumferential position to be moved. This is one for one targeted cleaning useful, on the other hand to start off pipe branches. Branches a pipe branch namely At a certain order fangsposition the tube of this laterally from, so the nozzle carrier targeted to this circumferential position and so in the vicinity or in front of or in the branch be moved into it.

At the supply line can the insertion length along the nozzle carrier the central longitudinal axis be recorded. In addition to detecting the angle of rotation, this provides Another important requirement for targeted interior cleaning of the pipe, over there the entry length the device in the tube also the longitudinal position of the nozzle carrier and so that the cleaning nozzle in the pipe is known. Also for the above start of branches It is important to the insertion length of the nozzle carrier in to know the pipe. Because, as mentioned several times, the central longitudinal axis the device extends approximately along the central longitudinal axis of the tube is the entry length of Supply line approximately equal to the longitudinal position of the nozzle carrier in Pipe.

alternative or additionally can be used to locate the cleaning nozzle In the tube also an ultrasonic location can be performed from outside the tube.

• – der Düsenträger wird in das Rohrsystem bis zur Abzweigung eingeführt,
• – der Düsenträger wird so rotiert, dass die Querkraft in Richtung der anzufahrenden Abzweigung zeigt,
• – der Düsenträger wird weiter vorgeschoben, ohne diesen dabei zu rotieren, bis sich der Düsenträger in der Abzweigung befindet.

If the internal cleaning of a pipe system with a branch is carried out, the following steps can be carried out:

• - the nozzle carrier is inserted in the pipe system to the branch,
• The nozzle carrier is rotated so that the lateral force points in the direction of the branch to be approached,
• - The nozzle carrier is further advanced without rotating it while the nozzle carrier is in the branch.

As already described, insertion can be up to the branch over the Recording the entry length to be controlled. about the detection of the angle of rotation, he nozzle carrier is then before the turnoff positioned so that it lies at the circumferential position of the pipe comes, where the branch is located. If the nozzle carrier then further advanced, he is by the lateral force further in the direction pressed the pipe branch and thus also advanced into this. Because the rotation of the nozzle carrier too This time is suppressed, namely the nozzle carrier thus pushes the corresponding Circumferential position along the pipe wall along the branch.

The Procedure can be carried out under water. That's how special high pressures for the Detergents are used, with which this over supply line and nozzle carrier the Nozzle is supplied.

The Detergent may be the nozzles be fed at high pressure in the range of 1000 to 4000 bar. The high pressure results in the advantage of very small quantities on cleaning agents, which are needed for cleaning.

With the method can cleaned the radioactively contaminated pipelines of a nuclear reactor become. As already mentioned, is the process for cleaning pipelines in the nuclear reactor because of the fast implementation, since no nozzle change for different Pipe diameter performed Need to become, the small amount of detergent, etc. particularly well suited.

For another Description of the invention is directed to the embodiments of the drawings. They show, in each case in a schematic outline sketch:

1 the exploded view of a cleaning device according to the invention,

2 mutually perpendicular longitudinal sections a) along IIa-IIa and b) along IIb-IIb by the assembled device according to 1 - 4 .

3 a cross section along III-III through the top of the device according to 1 - 4 .

4 a cross section along IV-IV through the nozzle portion of the device according to 1 - 4 .

5 the device according to 1 - 4 in the pipe interior cleaning,

6 the device according to 1 - 4 in a) approach to a branch pipe, b) branching into the first and c) branching into the second part pipe.

1 shows a cleaning device 2 putting one on one end of a high-pressure hose 4 attached nozzle head 6 includes. The nozzle head 6 in turn comprises a main body 8th , a compression sleeve 10 and a protective cap 12 ,

All components have a common central longitudinal axis 14 on and a respect to this substantially cylindrical construction.

The cleaning device comprises further, not shown and unspecified components at the other end of the high-pressure hose 4 , such as a drive for feeding and rotating the high-pressure hose 4 , a pump for loading the high-pressure hose 4 with cleaning agents, valves etc.

The main body 8th points in his, the high-pressure hose 4 facing area 16 a matching to the inner diameter D _{1 of} the high-pressure hose connecting piece with outer diameter D ₂ . This is with anti-slip 18 provided, although a postponement of the high-pressure hose 4 in the direction of the arrow 20 So on the body 8th allow, but its sliding against the direction of the arrow 20 prevent. The high pressure hose 4 is so far on the body 8th deferrable until its front end 22 at a radially extending, the area 16 limiting stop shoulder 24 to come to rest. By then pressing on the compression sleeve 10 , also in the direction of the arrow 20 , the high pressure hose 4 at the base body 8th against slipping in the direction of the arrow 20 secured. Also the compression sleeve 10 includes unspecified anti-slip devices. The front end 26 the compression sleeve 10 then lies on another stop shoulder 26 of the basic body 8th at. Between the stop shoulders 24 and 28 there is a circular cylindrical area 30 , The compression sleeve 10 has an outer diameter D ₃ .

Between the stop shoulder 28 and the area 16 opposite top 32 of the basic body 8th lies a cylindrical area 34 having an external pressure gauge D ₄ <D ₃ .

From the high pressure hose 4 facing end 36 up to the area 34 is the main body 8th with an axial bore 37 provided so that in the end 36 an opening 38 is available.

This communicates with the high-pressure hose plugged on 4 with its interior 40 ,

In the area 34 are in the main body 8th five radially inwardly extending, to the central longitudinal axis 14 reaching bores, which therefore with the opening 38 represent communicating channels. In alternative embodiments, not shown, two or more such channels may be provided instead of the five.

Starting from a first hole 42a , what a 1 is not visible, are symmetrical to that of the bore 42a opposite, each with an angular offset of about 35 ° two times two more holes 42b Arranged in pairs in two different axial planes with respect to the central longitudinal axis 14 are arranged. In the alternative embodiments just mentioned, these are otherwise in the range according to their number 34 arranged.

In the holes 42b -E is ever a cleaning nozzle 44b -E, into the hole 42a a counter nozzle 46 set. The cleaning nozzles 44b -D and the counter nozzle 46 therefore stand with the Innraum 40 of the high pressure hose 4 in connection. They serve to deliver not shown cleaning agent, by the interior 40 of the high pressure hose 4 in the direction of the arrow 20 is supplied.

In the circumferential direction to the hole 42a each offset by 90 ° and diametrically opposite each other are in the main body 8th two more holes 48a , b introduced, which, however, not to the central longitudinal axis 14 lead and thus not with the opening 38 communicate.

In the holes 48a , b are fixing screws 50a , b screwed. Bei on the body 8th against the arrow 20 attached protective cap 12 reach through the fixing screws 50a , b the openings 52a , b in the protective cap 12 and thus attach them to the body 8th , To escape the detergent has the protective cap 12 in the fitted state with the holes 42a -E aligned openings 54a e. The protective cap 12 again has the outer diameter D ₃ and thus closes seamlessly to the compression sleeve 10 at.

At the high pressure hose 4 opposite end 56 runs the protective cap 12 conical to a tip 58 towards, which with the distance D3 / 2 from the central longitudinal axis 14 is spaced. The tip is at the same circumferential position as the one with the counter nozzle 46 corresponding opening 54a ,

2a shows a section through the assembled cleaning device 2 out 1 along the cutting plane IIa-IIa. There is again the hole 37 and the hole communicating with her 42a with inserted counter nozzle 46 and com communicating opening 54a to recognize. Likewise the location of the top 58 at the corresponding circumferential position. In addition, the cleaning nozzles 44b -E in their holes 42b -E to see. Likewise, the between body is 8th and compression sleeve 10 clamped or mounted high-pressure hose 4 to see.

2 B does not show that to the hole 37 reaching holes 48a , b with inserted screws 50a and b and corresponding openings 52a and b. 2a , b also show that the top 12 from its circular circumference with diameter D3 cone-shaped to the top 58 tapped, with a cone side 60 the circular cylindrical outer shape of compression sleeve 10 just continues.

3 shows the section III-III 2a , Here again is the shape of the protective cap 12 recognizable, namely as this conical from the diameter D ₃ to the top 58 tapers. It can also be seen how the tip here at the outer edge D _{3/2 of} the projection surface 59 the protective cap 12 lies.

4 shows the section IV-IV 2 , Here again is the angular position of the holes 42a -E and 48a to see b to each other. In particular, are again the bore 42a symmetrically opposed holes 42b To see which against each other an angle α of about 70 °. In 4 are also the directions 62a -C, under which the counter nozzle 46 as well as the cleaning nozzles 44b -E Deliver detergent during operation. These have the same angular orientation to each other, as the holes 42a c.

Due to the cleaning agent flowing out during operation, each nozzle generates a recoil force. The cleaning nozzles 44b -E generate the forces F R , the counter nozzle 46 the power F G at the base body 8th , These forces add up vectorially to the main body 8th attacking total force F ges , This lift the perpendicular to the total force F ges acting shares of the forces F R because of the symmetrical arrangement and the same dimensioning of the cleaning nozzles 44b -E to each other and to the counter nozzle 46 each other up. Equal dimensioning here means that all cleaning nozzles in terms of magnitude equal recoil forces F R produce. Thus, the direction corresponds to the total force F ges also the middle beam direction 63 all cleaning nozzles 44b -E, so also the direction of the vectorial sum of all recoil forces F R equivalent. Alternatively, the recoil forces F R Be dimensioned unevenly or asymmetrically, so there is an asymmetrical force attack on the body 8th to allow a peeling effect during the cleaning process.

5 shows a pipe to be cleaned 80 , in which in the direction of the arrow 82 the cleaning device 2 was introduced. In the direction of the arrow 82 the tube expands 80 from an inner diameter D ₆ in a first section 84 to an inner diameter D ₇ in a second section 86 on. As soon as the nozzle head 6 the area 86 has reached, this is from the central longitudinal axis 88 of the pipe 80 to the pipe inner wall 90 deflected out. This is done by not shown cleaning agent in the direction 62a -C, as in 4 drawn, from the nozzle head 6 exit and by the resulting recoil forces a total force F ges on the nozzle head 6 acts. This corresponds to the transverse force according to the invention and acts exactly opposite to the direction 62a , ie the jet direction of the counter nozzle 46 , Thus, the total force acts F ges but also in the direction of the central jet direction of all cleaning nozzles 44b e. The cleaning nozzles 44b -E are thus in the immediate vicinity of the pipe inner wall 90 moves, which allows effective cleaning of these.

During the entire cleaning process, the cleaning device 2 around its central longitudinal axis 14 in the direction of the arrow 92 rotates. This happens outside the tube in a manner not shown. In the section 84 of the pipe 80 This leads because of the inner diameter D ₆ , only slightly larger than the outer diameter D _{3 of} the high-pressure hose 4 is, to that the high pressure hose 4 around its central longitudinal axis 14 rotates. Through the on the nozzle head 6 acting total force F ges however, it rotates in the section 86 of the pipe 80 the nozzle head 6 from the in 5 solid illustrated position in the direction of the arrow 94 around the central longitudinal axis 88 of the pipe 80 , After a rotation through 180 ° and an additional feed of the cleaning device 2 in the direction of the arrow 82 is the nozzle head 6 then in the dashed line position. Even then lie the cleaning nozzles 44b -E still close to the pipe inner wall 90 what the total force F ges constantly cares. So can the whole pipe 80 also in the section extended after a bottleneck 86 be cleaned effectively.

6a shows an alternative tube 80 with a turnoff 96 in two further sub-pipes 98a , b. The cleaning device 2 is in cleaning operation for cleaning the inner wall of the pipe 90 , It is, as explained above, by turning the high-pressure hose 4 with simultaneous effect of the total force F ges around the central longitudinal axis 88 of the pipe 80 emotional. In cleaning operation, so the entire inner wall 90 in the section 86 to the junction 96 cleaned.

After cleaning the section 86 should then the sub-pipe 98b getting cleaned. As in 6b Therefore, the cleaning device will be shown 2 so far advanced that they are above the sub-pipe 98b to come to rest. The rotation of the cleaning device 2 around the central longitudinal axis 14 is then stopped when the nozzle head 6 - In the circumferential direction of the pipe inner wall 90 seen - at the circumferential position of the branch of the sub-pipe 98a , as in 6b shown to come to rest.

From this position, the cleaning device 2 just continue in the direction of the arrow 82 advanced; one rotation is missing. Since cleaning agents continue to escape from the cleaning nozzles and the counter nozzle, the total force continues to be effective F ges on the nozzle head 6 , As a result, this is the direction of the sub-pipe 98b moved. Is the nozzle head 6 far enough into the tube 98b penetrated, as in 6 Dashed lines, the rotation about the central longitudinal axis 14 be resumed and cleaning the pipe inner wall 90 corresponding 6a but in the part pipe 98b continue to be conducted.

Is the sub-pipe 98b completely cleaned, the cleaning device 2 back in the 6b pulled out position withdrawn and the cleaning device 2 180 ° around the central longitudinal axis 14 emotional. This leads because of the continuing acting total power F ges to in 6c illustrated situation.

As already at the diversion into the partial tube 98b becomes without rotation around the central longitudinal axis 14 now the cleaning device 2 on the pipe inner wall 90 in the direction of the arrow 82 in the sub-pipe 28a advanced. Here it moves towards the branch of the sub-pipe 98a on the pipe inner wall 90 along. A branch in the partial tube 98b is thus safely avoided. Has the cleaning device 2 with her nozzle head 6 in the 6c Dashed position shown, the rotation about the central longitudinal axis 14 insert again and cleaning on the inner wall 90 of the sub-pipe 98a to be continued.

2

cleaning device

4

High pressure hose

6

nozzle head

8th

body

10

compression sleeve

12

protective cap

14

central longitudinal axis

16

Area

18

slipguard

20

arrow

22

The End

24

stop shoulder

26

The End

28

stop shoulder

30

Area

32

top

34

Area

36

The End

37

drilling

38

opening

40

inner space

42a-e

drilling

44b-e

cleaning nozzle

46

Gegendüse

48a, b

drilling

50a, b

fixing screw

52a, b

opening

54a-e

opening

56

The End

58

top

59

projection

60

cone side

62a-c

direction

63

middle beam direction

80

pipe

82

arrow

84 86

section

88

central longitudinal axis

90

Inner tube wall

92 94

arrow

96

diversion

98a, b

partialtube

D ₁

Inner diameter

D ₂ , D ₃ , D ₄

outer diameter

D ₆ , D ₇

Inner diameter

α

angle

F _R

Recoil cleaning nozzle

F _G

Recoil counter nozzle

F _ges

total power

Claims (23)

Contraption ( 2 ) for the internal cleaning of a pipe ( 80 . 98a , b), with a pipe to be cleaned ( 80 . 98a , b) along its central longitudinal axis ( 14 ) with a first end ( 22 ) insertable lead ( 4 ) for cleaning agents, with one at the first end ( 22 ) connected nozzle carrier ( 6 ), on which at least one with respect to its beam direction ( 62b , c) transverse to the central longitudinal axis ( 14 ) aligned cleaning nozzle ( 44b -E) and at least one counter nozzle ( 46 ) are arranged for dispensing the cleaning agent, wherein the counter jets ( 46 ) so aligned ( 62a ) and that are dimensioned that of cleaning nozzles ( 44b -E) and counter jets ( 46 ) recoil forces generated in operation by effluent cleaning agent ( F R . F G ) to one on the nozzle carrier ( 6 ) transverse to the central longitudinal axis ( 14 ) acting lateral force ( F ges ) add. Contraption ( 2 ) according to claim 1, in which the transverse force ( F ges ) on the nozzle carrier ( 6 ) in the direction of the mean beam direction ( 63 ) of all cleaning nozzles ( 44b -E). Contraption ( 2 ) according to claim 1 or 2, wherein two cleaning nozzles ( 44b , c / 44d , e) with an angular offset (α) in a plane perpendicular to the central longitudinal axis ( 14 ) on the nozzle carrier ( 6 ) are arranged. Contraption ( 2 ) according to claim 3, wherein the angular offset (α) is between 0 ° and 170 °, in particular 60 ° and 80 °. Contraption ( 2 ) according to one of claims 3 or 4, in which the cleaning nozzles ( 44b -E) in pairs ( 44b , c / 44d , e) in staggered planes perpendicular to the central longitudinal axis ( 14 ) are arranged. Contraption ( 2 ) according to one of the preceding claims, in which the nozzle carrier ( 6 ) with respect to the central longitudinal axis ( 14 ) rotationally fixed to the supply line ( 4 ) connected Contraption ( 2 ) according to one of the preceding claims, in which the supply line ( 4 ) facing away from the nozzle carrier ( 6 ) become a tip ( 58 ) is tapered conically. Contraption ( 2 ) according to claim 7, wherein the tip ( 58 ) within the projection surface ( 59 ) of the nozzle carrier ( 6 ) along the central longitudinal axis ( 14 ), and eccentrically outside the central longitudinal axis ( 14 ) lies. Contraption ( 2 ) according to claim 8, wherein the tip at the outer edge (D _3/2 ) of the projection surface ( 59 ) lies. Apparatus according to claim 8 or 9, wherein the tip at the same circumferential position of the nozzle carrier ( 6 ) like the counter nozzle ( 46 ) is arranged. Contraption ( 2 ) according to one of the preceding claims, in which the nozzle carrier ( 6 ) one the nozzles (( 44b -e) 46 ) supporting body ( 8th ) and a detachably attached end cap ( 12 ). Contraption ( 2 ) according to claim 11, wherein the end cap ( 12 ) a peak ( 58 ) according to claims 7 to 10. Contraption ( 2 ) according to one of the preceding claims, in which the cleaning agent is water. Method for cleaning the inside of a pipe ( 80 . 98a , b), with the following steps: - into a pipe to be cleaned ( 80 . 98a , b) a supply line ( 4 ) for cleaning agents along their central longitudinal axis ( 14 ) with a first end ( 22 ), whereby at the first end ( 22 ) a nozzle carrier ( 6 ) is connected to the at least one with respect to their beam direction ( 62b , c) transverse to the central longitudinal axis ( 14 ) aligned cleaning nozzle ( 44b -E) and at least one counter nozzle ( 46 ), - in operation give cleaning nozzles ( 44b -E) and counter jets ( 46 ) Cleaning agents and thereby generate recoil forces ( F R . F G ), with the counter jets ( 46 ) are aligned and dimensioned so that the recoil forces ( F R . F G ) to one on the nozzle carrier ( 6 ) transverse to the central longitudinal axis ( 14 ) acting lateral force ( F ges ) add. Method according to Claim 14, in which the nozzle carrier ( 6 ) together with the nozzles ( 44b -e, 46 ) about one to the central longitudinal axis ( 14 ) in the area of the nozzle carrier ( 6 ) parallel axis ( 88 ) is rotated. The method of claim 15, wherein the nozzle carrier ( 6 ) rotationally fixed to the supply line ( 4 ) is attached, wherein the nozzle carrier ( 6 ) by rotation ( 92 ) of the supply line ( 4 ) ( 88 ) becomes. Method according to one of claims 14 to 16, wherein the angle of rotation of the nozzle carrier ( 6 ) during its rotation ( 88 ) is detected. The method of claim 17, wherein the nozzle carrier ( 6 ) rotationally fixed to the supply line ( 4 ) is attached, in which the angle of rotation of the supply line ( 4 ) is detected. Method according to one of Claims 14 to 18, in which on the supply line ( 4 ) the insertion length of the nozzle carrier ( 6 ) along the central longitudinal axis ( 14 ) is detected. Method according to one of claims 14 to 19, wherein the internal cleaning of a pipe system ( 80 ) with a branch ( 96 ) in partial pipes ( 98a , b), with the following steps: the nozzle carrier ( 6 ) is inserted into the pipe system ( 80 ) to the junction ( 96 ), - the nozzle carrier is rotated ( 88 ), that the lateral force ( F ges ) in the direction of the approaching sub-pipe ( 98a , b) shows, - the nozzle carrier ( 6 ) is advanced ( 82 ) without rotating it ( 88 ) until the nozzle carrier ( 6 ) in the partial tube ( 98a , b). A method according to any one of claims 14 to 20, which is under water carried out becomes. The method of claim 21, wherein the cleaning agent is applied to the nozzles ( 44b -e, 46 ) is supplied at high pressure in the range of 1000 bar to 4000 bar. Method according to one of claims 14 to 22, wherein the radioactively contaminated pipelines of a nuclear reactor cleaned become.