WO2001075351A1

WO2001075351A1 - Method and coating system for coating and sealing pipes

Info

Publication number: WO2001075351A1
Application number: PCT/DE2001/001229
Authority: WO
Inventors: Klaus Berdin; Eckehard Deggerich; Friedhelm Graf
Original assignee: Dbs Beschichtung Und Systeme-Technik Gmbh
Priority date: 2000-04-03
Filing date: 2001-03-30
Publication date: 2001-10-11
Also published as: AU2001256130A1

Abstract

According to the inventive method for internally coating pipes (2) and long, extended hollow bodies, the truck (4) and the pipeline (12) are driven independently of each other and the pipeline (12) is supported by centering and load-relieving rollers (30, 31). The pipeline (12) can be guided and pulled evenly in the transitional area by means of driving and deflection rollers (37, 38, 39). The truck (4) travels evenly, stably and reliably through the pipe (2), hereby guaranteeing an even coating of the inner wall (3) of the pipe over its entire length.

Description

Process and coating system for coating and sealing pipes

Description

The invention relates to a method for coating the inside of pipes and other elongated hollow bodies and sealing the pipe connections via a carriage which can be moved longitudinally in the pipe and having a distributor, via which the components of the coating agent, which are brought up to it separately in a securing wiring harness, as a mixture on the Inner pipe wall are applied, the coating work is continuously monitored and spray errors are corrected accordingly in one operation. The invention also relates to a coating system for the coating of pipes and elongated hollow bodies and sealing of the pipe connections for carrying out the method with a carriage guided along the inner wall of the pipe, to which a distributor with a mixer and discharge nozzle and a camera carriage is arranged and which also has a rotary feedthrough is connected to a wiring harness in which the component lines are stored separately and are heated with respect to the components and which is designed to be able to be wound onto a drive drum outside the tube.

The pipelines and sewers in the municipal and commercial area in the Federal Republic of Germany and in other countries date in part from the previous century or at least from the early part of the 20th century. The corresponding pipes and channels have been strongly influenced by the wastewater or other transported liquids and masses over the years and have become so porous or damaged that the wastewater or other material penetrates into the subsoil and often leads to pollution of the groundwater , Due to the extensive pipe network, it is not possible to replace the entire pipes and ducts. In recent years, the company has started to apply coatings in order to close the leaks in the existing pipeline network remove. So-called liners are known, in which glass fiber-impregnated with glass or felt tube pieces wrapped around a packer are brought up to the damaged area and then pressed against the wall by the inflating packer. Due to the circumstances described and the curing times of the resin, the packer often has to remain in the inflated position for hours before being available for a new use. It is therefore only possible with such a method, if at all, to seal the inner wall at individual points. Another disadvantage is that the liner has to be pulled and transported up to 150 m in order to be provided with a new glass fiber covering (DE-OS 40 21 456). From DE-GM 297 16 585 a so-called renovation system is known in which a pipe section under pressure is coated with the renovation agent in this state. The coating is carried out via a coating system that throws the remedial agent against the inner wall of the pipe by centrifugal force or pressure. The disadvantage here is that, especially in the case of defective pipelines, the corresponding pipe sections can hardly be kept under the necessary pressure. In addition, it is disadvantageous that the renovation material or the resin material cannot be applied without problem in such a way that it also adheres to the intended location of the inner wall of the channel and the pipe where the exact location of the damage has been found. Rather, the material that has a certain hardening time will usually drip or run off, so that the coating will be imprecise or not at all dense. Also known are methods in which two-component mixtures are thrown onto the inner tube wall with the aid of a rotating head or in which spraying is carried out with the aid of a nozzle, the problem with the latter being that bumps or connections cannot then be coated uniformly because a Splash shadow is created. The process is also problematic for pipes with smaller diameters of less than 500 or even fewer millimeters. Another problem with the known methods is that the carriages used with the distributor frequently move jerkily or cannot be held exactly in the center of the pipe, so that there is an uneven coating and in particular the harmful dripping or draining of the resin or other coating agents can come. The invention is therefore based on the object of providing a method and a system by means of which a consistently uniform movement of the trolley in the tube, at the same time a rapid retraction of the wiring harness and a permanently uniform and verifiable coating of the tube is ensured in all areas.

The object is achieved according to the invention in that the trolley and wiring harness are driven independently of one another, in that the wiring harness is guided over centering and relief rollers arranged in the pipe over the length of the wiring harness and in the transition area over drive and deflection rollers and that the trolley is driven over the guide rollers assigned to the skids is guided in a rolling manner on the inner tube wall.

Due to the separate drive of the trolley and the wiring harness, it is first possible to move or pull the wiring harness into or into the pipe section up to the end of the pipe section to be coated. Subsequently, with the help of the wiring harness and / or the drive of the trolley, the distributor, or rather the trolley with the distributor, can be pulled through the pipe evenly and quietly, so that a uniform coating is ensured over the entire length. If it is determined via the camera carriage that there are still leaks or spraying errors, these can be remedied immediately by gently reversing the carriage using its drive. The wiring harness itself is guided over the entire length of the pipe to be coated in a targeted manner via centering and relief rollers, so that the trolley runs very smoothly during this coating process. Optimization then takes place in that the trolley itself is not only pulled through the pipe supported on skids, but also rolling over the guide rollers which are assigned to the skids. All in all, this results in a uniform movement over the entire length of the pipe section to be coated, which is further favored by the fact that the carriage is equipped with a drive which brakes when pulled out with the help of the wiring harness in order to specifically equalize the travel process. Trolley, The train module and wiring harness are each articulated together. This articulated connection ensures that the trolley, train module and wiring harness remain independent of one another with regard to the direction of the train or the influence. The articulated connection ensures that a completely uninfluenced sequence of the coating process is possible both when pulling the cable strand into the pipe section and when pulling out and coating.

For even sealing of the sleeves, d. H. So the connections between the individual pipes, the invention provides that the area on both sides of the points to be sealed in the area of a pipe connection is effectively closed during the sealing work, preferably via a packer, that quickly hardening material is mixed and then in the sleeve slot sealed against the pipe interior and the subsequent filling chamber is injected and then the discharge element of a mixing and discharge module unit is cleaned.

With the help of such a method, it is possible to effectively and practically continuously rehabilitate a pipeline in the respective socket area, the respective location not only being “paved”, but rather being completely closed, it also being conceivable for this work to be carried out in addition to coating or even alone make. In particular, due to the sealing on both sides of the sleeve slot, only a relatively small amount of two-component or other material needs to be injected, this taking place in a matter of seconds, filling both the sleeve slot and the subsequent filling chamber. This leads to a clawing of this sealing complex and it is impossible that when the pipeline is subsequently put back into operation, the renovation or seal once introduced will be damaged or even destroyed. It is particularly advantageous that this method also makes it possible to effectively seal pipes which are offset from one another, because only the socket slot is specifically filled and only in the area which is necessary for effective sealing. Finally, it is advantageous that the targeted sealing means that only relatively little quick-curing material is required. As mentioned, it is provided that a packer, which receives the mixing and discharge module unit in the center, is used for closing which is clamped against the pipe wall and is pulled to the next socket after relieving the pressure. The packer is thus clamped to the respective sleeve on both sides of the sleeve slot, so that only the practically linear area of the sleeve slot remains, which has to be closed by injection. Then, after a short hardening of, for example, 10 or 20 or maybe even 30 seconds, the packer is relieved and pulled to the next sleeve, where the same sealing work can be carried out.

The uniform sealing in the socket area is achieved according to the invention by injecting the two material components to be mixed and discharged and reacting with one another in a uniformly heated manner into the socket slot. This is achieved in that, in addition to the feed lines for the material components, the mixing and discharge module unit, but at least the discharge module, is heated, the temperature of the mixture being 40 to 70 ° C. This ensures that the two components are injected, in particular after or during the mixing process, and are kept in the correspondingly optimal temperature, that is to say into the sleeve slot, which has a different temperature, where it then quickly cures without the risk that only insufficiently reacting material components are present. The heat of reaction has a positive effect. In order to ensure that injection is really only carried out into the sleeve slot, it is provided that the mixing and discharge module unit is brought specifically to the sleeve slot and that the rapidly hardening material is discharged into the sleeve slot sealed up to the entry point against the inside of the pipe. As will be explained further below with reference to the device, this targeted approach ensures that the discharge module unit is located exactly opposite or in the area of the sleeve slot, thus injecting it into this slot, the inflatable packer used ensuring that in the ring area only the socket slot needs to be filled, not an area beyond the inner wall of the pipe. This has the great advantage that a smooth inner wall is available after completion of the filling work, which has no protrusion and thus does not cause any turbulence or the like. causes. For the implementation of the process, a coating system is used, which has a trolley, a distributor with mixer and discharge nozzle, a downstream camera carriage, a rotating union and the sufficiently stabilized cable harness. This wiring harness is rolled up over the drive roller, it being provided according to the invention that the trolley is equipped with guide rollers and a traction module that has drivable and / or braking drive wheels, that centering and relief rollers attached to the wiring harness are distributed over its length and that a cable harness intake and deflection tubes arranged in the transition area and in the above-ground area are provided. Via the guide rollers assigned to the runners of the trolley, the trolley slides smoothly and damped along the inner wall of the pipe, regardless of whether it is pulled into the pipe section to be rehabilitated by the train module together with the cable run or pulled through this pipe section with the help of the cable train. Using the drive and brake wheels, it is possible to work with the train module in both directions and to move the trolley accordingly or to slow it down when pulling it out with the help of the cable harness in such a way that the movement of the trolley is evened out and stabilized. The centering and relief rollers provide appropriate support for the cable harness when it is moved back and forth through the pipe section to be rehabilitated, whereby the cable harness indentations and deflection tubes arranged in the transition area and above ground can optimally even out the pulling out of the train module, trolley and, of course, the cable harness. The entire wiring harness is routed in the wiring harness feed in such a way that the components routed in the component lines cannot be impaired, just like the other lines and cables laid there.

In order to be able to carry out movements in both directions with the train module and this also at a uniform speed, it is provided that the train module is equipped with electric motors, preferably two electric motors, and that drive and / or guide wheels are assigned to the upper and lower parts of the train module. The tensile module is thus not only pulled through the pipe section to be rehabilitated, but also to the inner pipe wall supported at the top so that the train module cannot move out of the intended position, that is to say approximately in the center of the pipe, regardless of the direction in which the train module is moved. The drive wheels are prevented from spinning and the smooth running of the train module is ensured by the drive wheels being designed to be braced against the inner tube wall, preferably via a pneumatic roller bar. The guide rollers in the area of the upper part act accordingly as a backup for the smooth movement of this train module. A mutual influence of the train module or trolley or the wiring harness is largely prevented by the fact that the train module is connected on the one hand to the trolley and on the other hand to the wiring harness via universal joints. The shaft joints advantageously make smaller and medium-sized pipe depressions, so that these transitions must also be coated evenly, so that further processing of the pipe section is not necessary.

It has already been pointed out above that the cable harness is pulled and guided in the transition area, the cable harness pull-in arranged in the transition area with deflection rollers being expediently assigned to a telescopic slide which can be clamped between the pipe ends or in the shaft and which is connected to the pipe ends and has telescopic connecting pipes and that the cable harness intake and deflection rollers arranged in the above-ground area are arranged mounted on a truck platform and have drives which are designed to be switchable in a manner corresponding to those associated with the transition area, preferably switchable at the same speed, the deflection rollers in the transition area and on the truck platform are assigned to a support arm connected to the cable harness intake, which is designed to be curved in accordance with the intended deflection angle. In this way, the wiring harness retraction and the associated deflection rollers can advantageously be fixed exactly in the position that is required for optimal guidance and, in particular, a uniform pulling of the wiring harness. The wiring harness is brought from the horizontal to approximately the horizontal in the transition area, in order then to be guided approximately horizontally again at the upper edge of the shaft via the deflection rollers arranged there, in which the wiring harness insertion is advantageous for a compensating pull of the wiring harness provides. The telescopic slide also makes it possible to work with a corresponding device in both directions by then repositioning and fixing the wiring harness intake and the deflection rollers accordingly. A permanent train on the wiring harness is secured because the telescopic slide is connected to the pipe ends and has telescopic connecting pipes. The deflection rollers and in particular the cable harness intake can thus be held in such a way that it provides the necessary drive for the cable harness and ensures that it is pulled evenly through the cable harness intake and transported to the upper edge of the shaft without the coating taking place in the pipe thereby is adversely affected in any way. In addition, there is an inexpensive installation option due to the special arrangement and design of the cable harness intake and deflection rollers, but there is also a quick move with the coating system if the cable harness intake and deflection rollers arranged above ground are mounted on a truck platform and have drives that with which are designed to be switchable corresponding to the transition area, preferably working at the same speed. Both drives run at the same speed, which significantly reduces the forces caused by the deflection. This also contributes significantly to the smooth and quiet movement of the vehicle through the pipe section to be renovated. The deflection of the wiring harness to be caused by the deflecting tubes is always specified in the same way, in that the deflecting tubes in the transition area and on the truck platform are assigned to a support arm connected to the wiring harness intake, which is designed to be curved in accordance with the intended deflection angle. So there are always several redirection ducts one after the other, so that a gentle redirection of the cable harness is guaranteed. The arched support arm specifies the deflection to be provided by the wiring harness.

The precise guidance of the spray jet of the nozzle is given in particular in the distributor according to the invention if the rotating distributor on the carriage is arranged at a right angle or approximately at right angles to the center axis and with its outlet opening is set back with respect to the center axis of the spray head. sets is arranged on a support arm. Depending on the pipe diameter, the distributor or the corresponding nozzle with the mixing chamber is also more or less distant from the center axis, so that smaller pipe diameters can also be reliably coated. It is important that the distributor is arranged at a right angle so that the exact distance can be specified, the distance ultimately also depending on the shape given to the spray jet. If the beam is bundled, the distance is larger, if the beam is open, the distance is smaller.

An always clean and clear spray pattern of such a nozzle is endangered if residues of the two-component mixture become lodged on the outlet opening and can only be removed again with great effort after the corresponding hardening. It is then often necessary to replace the entire spray head or distributor. According to the invention, this is unnecessary in that the outlet opening is assigned a cleaning needle which is displaceable in the inner bore of the outlet opening and which is arranged to clean it, and an air nozzle which is designed to be approximately perpendicular to the spray jet of the discharge nozzle and is aligned with the outlet opening and can be switched to blow-off when the end position is reached by the cleaning needle. It is thus possible to move the remains of the two-component mixture remaining in the inner bore in the direction of the outlet opening with the help of the cleaning needle and then to push this material away from the discharge opening with the help of the air nozzle, so that this material does not impair the spray pattern when the spraying or spraying process starts again can. Rather, with the help of the air nozzle, the rest of the two-component mixture pushed up by the cleaning needle is practically blown away before setting, so that a completely clean outlet opening is available when the spraying process starts again. The pushed-up remnants of the two-component material are effectively "disposed of" by the air nozzle blowing them off accordingly. The air nozzle is thus aligned in such a way that the remnants of the two-component mixture are actually captured via the compressed air and are "blown away" in such a way that they can no longer represent a hindrance. Due to the rather small amounts of the two-component mixture, the blown-away material can Do not induce or induce pregnancy elsewhere.

In order not only to ensure a perfect spray pattern when the coating process starts again, but also to prevent mixing errors when starting again, according to the invention the rotating distributor is designed to be heatable at least around the inner bore and the material feed and also the rotary feedthrough and the housing of the Trolley heated by a heater. In this way, the two material components can be kept warm enough and precisely before they are brought together in the mixing chamber that the coating process can be restarted immediately if necessary. After mixing, the two components are pressed out through the nozzle, ensuring that the mixing is always the same and safe. Both the spray pattern is flawless, as is the composition of the mixture, so that an optimal coating of the inner pipe wall is guaranteed overall.

According to a further expedient embodiment of the invention, it is provided that the rotating distributor has a U-shaped support arm, one of which, preferably telescopic leg, is connected to the spray head and the other leg is shortened and the mixer and outlet opening is designed to carry the head, the legs connected to the spray head and the spray head have groups of bores which can be positioned with one another resulting in a more or less large offset from the center axis. With such a design of the support arm, it is possible to change the length of the leg in relation to the spray head, ie to shift or move the mixer and outlet opening more or less far with respect to the central axis, so that the distance to the inner wall becomes greater. Of course, a shortening of this leg or its effective length is equally possible, so that the mixer and the outlet opening are accordingly shifted closer to the center axis. The mixer and the outlet opening are arranged in front of the head of the other leg, that is to say here the shorter leg, so that they are directed towards the inner wall, as a result of which uniform and safe application to the inner wall is achieved. The change in the position of the mixer is favored by the telescopic legs. It can simply be pushed together or pulled apart in order to correct the distance from the mixer and the outlet opening to the inner wall accordingly or to bring it into a position which favors the application of the two-component mixture or the other coating material. The special design of the spray head ensures that, for example, two holes form a group, which ensure an effective fixing of the leg on the spray head when the corresponding connecting screws are screwed in. By loosening both screws and moving the leg to cover another group of holes, the corresponding shift relative to the central axis then becomes possible, although it is of course also conceivable to provide a continuous row of holes both on the leg and on the spray head, the distance between the individual holes is always the same. Even then it is possible to slide the leg along the spray head and to secure it in the desired or correct position by inserting the connecting screws. A detachable connection of the mixer or nozzle with the shortened leg enables changes to be made quickly and easily.

The back and forth movement of the vehicle is facilitated in that a counter-pulling device is created in that the vehicle has a counter-pulling device on the spray head side in the form of a pulling cable, which is connected to the spray head via a rotating frame comprising the rotating distributor Distributor rotating and is designed to leave a window for the outlet opening and on the cross strut facing the counter-tensioning device has a pivot bearing receiving the traction cable. The rotating frame can thus rotate together with the spray head and thus also with the rotating distributor, without the operation of the rotating distributor and the outlet opening being influenced thereby. The rotating frame itself then forms an attachment point for the pull rope, it being explained further below how the attachment should expediently take place. The traction cable can be attached to the rotating frame without the traction cable also rotating, in that the rotating frame rotates with the distributor and leaves a window for the outlet opening and on which the counter-pull Direction facing cross strut has a pivot bearing receiving the cable. Since the rotating frame also rotates with the rotating distributor, the window for the outlet opening or the nozzles is always present, so that the jet stream cannot be obstructed by the rotating frame. Rather, it is possible for the traction cable to strike the swivel bearing correctly, the rotating frame always rotating evenly without influencing the traction cable.

It is generally known to assign a camera device to the vehicle in order to check the state of the inner wall or the channel wall and to include this in the further considerations. The area behind the vehicle that has been renovated remains unobserved or you have to rely on the fact that the coating system worked perfectly. According to the invention, in which the traction cable is arranged on the distributor side, there is now the possibility of tracking a camera carriage which monitors the coating process and thus also gives the possibility of pulling the vehicle back when necessary in order to enable the inner wall to be reworked. This is possible according to the invention in that a camera carriage is assigned to the traction rope, which has a camera with a lens, which is arranged facing the work section to be coated or just coated, and which is equipped with a protective blowing device which protects the lens against coating material and Spray mantle protective shroud is arranged and formed. The lens thus looks exactly in the direction where the coating is currently being carried out via the rotating dispenser so that this important work can be monitored. If there is a need for correction, the traversing process is stopped via the camera carriage or the corresponding devices and the entire coating system is withdrawn in the opposite direction. The protective mist is created with a material that cannot influence the lens, but in return ensures that no coating material can get into the area of the lens. This ensures that the spraying or coating process is always monitored uniformly and, moreover, that large sections of pipes or ducts can be renovated without the need to convey and overhaul the entire coating system during the day. A coating system is used in particular for the rehabilitation, if necessary, only of the connection area of the individual pipes, according to which the trolley is assigned a module unit designed as a mixing and discharge module unit, which is connected to the jacket of an inflatable packer assigned to the trolley and which is equipped with a heater and which has a counterflow mixer and a discharge in the form of a nozzle with cleaning needle and heating. While the travel unit is only to be designed in such a way that the module unit can be moved back and forth in the pipe, the module unit here has been changed and further developed by not only having a simple inflatable packer that presses the sleeve against the inner wall of the pipe when it inflates, but rather A blending and discharge module unit is integrated in the inflatable packer, with which two-component or multi-component material can be injected into the sleeve slot. The inflatable packer is used to bring the mixing and discharge module unit to the socket slot or even to lead it into it and at the same time to effectively seal the area around the socket slot on both sides so that the material subsequently injected into the socket slot only into the socket slot itself entered and not in the subsequent pipe interior. The inflatable packer thus takes on a double function, namely that of the sealing unit and that of the guide unit for the mixing and discharge module unit. In addition, the assignment of a heater to the mixing and / or module unit ensures that the components used are kept at a temperature level that is necessary or expedient for optimal mixing and reaction of both material components. An optimal mixing and reaction of the components of the material to be introduced is achieved in that the module unit has a counterflow mixer and a discharge in the form of a nozzle with cleaning needle and heating. The two components are thus first mixed in counterflow and then discharged through the nozzle, where they are mixed further in order to then react in the sleeve slot and the filling chamber and thus achieve the necessary sealing and clawing effect. It is expedient to use materials that have a tensile strength and thus can also smoothly compensate for movements in the socket area and which are also approved for DVGW for gas pipes, so that their processing is permitted in German and European countries. After mixing and Discharge through the nozzle is cleaned by a needle that can be pushed through the nozzle so that the nozzle cannot become caked or clogged. The effect of the heating was pointed out earlier. It turns out that the two material components to be mixed with one another are mixed with one another at the optimum temperature and discharged.

The cleaning needle can carry out its task effectively because, in accordance with the invention, it is dimensioned to correspond to the diameter of the nozzle and is displaceably arranged in the nozzle via a cylinder and is adjustable in terms of its effective length. Since compressed air is needed in the area of the packer anyway, this energy is available to move a cylinder back and forth with the attached needle and thus to ensure that the nozzle is cleaned again after each mixing and application process. The needle is dimensioned in such a way that it is guided along the wall of the nozzle without being able to get stuck without also allowing the use of two-component material. The needle must have a length that ensures that the remaining material in the nozzle is also safely ejected and thus removed from the area of the discharge. However, it may be necessary to change their length or their arrangement, which may be necessary in particular if the mixing chamber or the mixing channels must have a larger volume in order to optimize the mixture. This is achieved according to the invention in that the needle is designed to be adjustable in terms of its effective length. For example, it is conceivable that it has a thread so that it is unscrewed more or less and thus changes its effective length.

It has already been pointed out earlier that the inflatable packer also serves to bring the mixing and discharge module unit close to the sleeve slot or the repairing point. This is achieved particularly expediently in that the jacket of the inflatable packer is formed in one piece in the connection area of the module unit or has an integrated annular reinforcement, the length of which can be changed according to the intended use, the jacket being equipped with a largely non-porous, preferably exchangeable non-stick outer skin. The stiffening or the one-piece design ensures that the inflatable ker in this area is pressed against the inner wall of the pipe with a slightly lower pressure force, so that effective discharge is additionally ensured. The stiffening can also be designed in a ring shape so as to uniformly define a shape or a molding wall around the sleeve slot, against which the rapidly reacting material can rest, in order to then ensure that the entire area of the sleeve slot is also secured and sealed all around , If it is necessary to fill or seal other areas in addition to the socket slots, this can be made possible by changing the length of the stiffening according to the intended use. This means that the stiffening can also extend, for example, several centimeters in the longitudinal axis of the tube, in order to provide a flat area either with a coating or else with an injection. Damaged pipes can be repaired in the same way. Inflatable packers are made of a rubber or plastic material that has a corresponding roughness, but is of course airtight. In order to prevent quick-hardening material from caking in the transition area between the sleeve slot and the pipe wall, it is provided that the jacket of the inflatable packer is equipped with a largely non-porous, preferably exchangeable, non-stick outer skin. As a rule, this non-stick outer skin has no pores at all, so that corresponding caking cannot occur. This optimizes the possibility of renovating such a pipeline or gas line in sections, that is to say from socket to socket, in one pass, that is to say without the inflatable packer or the corresponding device having to be overhauled in the meantime for overhauling.

Especially when larger openings or holes in the pipeline have to be closed, it may be necessary to introduce or inject larger quantities of fast-curing material in correspondingly short time units. This is ensured by the module unit being designed to be interchangeable with a module unit equipped with larger bores / mixing chamber and nozzles. For this purpose, the module unit is expediently detachably connected to the packer, so that by simply unscrewing the fastening screws, the small module unit can be exchanged for the large module unit or vice versa. The larger module unit then has larger bores and a correspondingly larger nozzle, so that correspondingly larger quantities can be pressed into the socket slot or into other areas to be renovated in the same time unit with the necessary pressure.

The invention is characterized in particular by the fact that a consistently uniform movement of the trolley is ensured in the tube, so that the tube inner wall is always coated in the same way. Not only is a uniform movement of the trolley guaranteed during the coating process, but it is also ensured that this trolley is safely transported into the pipe section to be renovated by the assigned train module, with both the trolley and the train module as well as the wiring harness in the are always held in the optimum position so that the two components are discharged in the correct mixture and consistency via the distributor and the assigned nozzle. In particular, when pulling out the trolley and the train module via the wiring harness, this takes place very evenly and specifically because the pull module is also equipped with brakes, so that a uniform method that maintains the wiring harness in each case is achieved. The individual parts, ie the carriage, the train module and the wiring harness cannot influence each other in the horizontal or other direction, because an articulated connection was selected here. The invention can moreover be used advantageously both in the case of a coating with a rotating distributor and with a centrifugal head. The invention is further characterized in that a coating system is created with a rotating distributor which can be adapted to the changing operating conditions without great effort. All that is required is to replace the nozzle at the outlet opening or else the entire mixing and discharge head in order to replace it with another one that is more suitable for the respective material. Since the parts are detachably connected to the rotating distributor or the support arm, such an exchange is possible without great effort. It is even more important, however, that the distance between the mixing and outlet head or the rotating distributor to the inner wall can be changed in such a way that the rotating distributor or outlet opening is at a distance from the inner wall of the pipe to be coated, which is one Rebound effect prevented. Rather, the mixing and discharge head is moved so far out of the center axis that there is a sufficiently large distance, which means that the two-component mixture or other coating material can be applied at the necessary speed even with small diameter pipes that it sticks to the inner wall and does not bounce back and falls to the bottom of the pipe and settles there. Since the distributor keeps itself in a position by rotating it more or less quickly, which enables the coating material to partially solidify early before a new layer is applied, a pipe or a duct can be renovated in very short times. Gas lines with more complicated connections can also be sealed advantageously in the connection area of the individual pipes. This is achieved, in particular, by moving the device used in a targeted manner into the area of the sleeve, in order to then be brought close to the sleeve slot to be filled by inflating the packer. The quick-setting material that is to be introduced and has an advantageous elasticity or extensibility is then specifically injected into the actual module slot and the subsequent filling chamber after the inflation packer has inflated, in order to then relieve the inflation packer after a short waiting time and to move to the next sleeve slot , This means that only the area that is really necessary is sealed in such a way that a permanent seal is guaranteed and, as already mentioned, a better one than when the respective gas line was relocated. The sleeve slot that used to be forced is now completely closed. Such a successful refurbishment is extremely important, especially for gas pipes, especially since both the new installation and the refurbishment mentioned here first give the option of introducing appropriate material that interacts with one another in such a way that no swirling or no noteworthy swirling can occur in the area of the socket, namely because only the slot is filled, but not a protruding bead arises. At the same time, a reduction in material requirements is achieved and, ultimately, the population's need for security can be optimally taken into account without incurring extreme costs. Further details and advantages of the subject matter of the invention emerge from the following description of the accompanying drawing, in which a preferred exemplary embodiment is shown with the details and individual parts required for this. Show it:

FIG. 1 shows the coating system with the parts that can be moved in the tube,

Figure 2 is a coating system with the pulling the wiring harness

3 shows a side view of the staggered, rotating distributor with nozzle and air nozzle, FIG. 4 shows a coating system with a vehicle, rotating distributor and

Camera carriage with counter device in side view, FIG. 5 a rotating distributor with connection to the spray head,

Figure 6 is a view comparable to Figure 4, with the support arm in

7 shows a longitudinal section through a gas line in the area of a sleeve with a high-pressure injection device, FIG. 8 shows a section through the high-pressure injection device and

9 shows an enlarged representation of the longitudinal slot according to FIG

Neckline.

The coating system 1 consists of the parts which can be moved in the pipe 2 and also the parts which are arranged above or in the shaft, the latter being shown in FIG. 2.

The carriage 4 of the coating system 1 is supported on the inner tube wall 3 and moved via the train module 22 into the tube 2 in the direction of the camera carriage 10. At the same time, the cable harness 12 is also drawn into the pipe 2, supports being provided over the length here as well, which will be discussed further below.

On the side of the trolley 4 assigned to the camera carriage 10 there is a Rotating distributor 5 is arranged, which is arranged offset with respect to the mixer 6 and the discharge nozzle 7 with the outlet opening 8 from the central axis 17, so as to keep the distance to the respective pipe inner wall 3 so that a rebound of the two-component mixture or other coating material cannot occur , A uniform spray jet 9 is generated, as shown in FIG. 1 and FIG. 3.

The rapidly rotating distributor 5 can be used here without any problems because the carriage 4 is equipped with a rotary feedthrough 11, so that the component lines 13, 14, 15, 16 brought up in the wiring harness 12 can be connected to this rotating part. This also applies to the component lines 15 and 16 which introduce air or electricity.

While the coating system 1 or the carriage 4 is drawn into the pipe 2 via the train module 22, it is then driven via the cable harness 12 for coating. For this purpose, the drive drum 18 is used, the surface, d. H. is arranged on the surface of the earth in the above-ground area 35.

The carriage 4 has three, four or more skids 21, each of which preferably has spring-mounted guide rollers 19, 20, so that the "running" of the carriage 4 on the inner tube wall 3 can advantageously run smoothly and evenly. The train module 22 is equipped with drive wheels 23 and guide wheels 24, the drive wheels 23 being assigned to the lower part 27 and the guide wheels 24 to the upper part 26. The electric motors 25 of the train module 22 also contribute to an equalization, the drive wheels 23 assigned to the lower part 27 being braced in the tube via a pneumatic roller bar, so that the drive wheels 23 are prevented from spinning. These drive wheels 23 also have brakes, so that when pulling out the trolley 4 with the help of the wiring harness 12, an equalization is achieved, but above all it is ensured that the wiring harness 12 is always kept under tension, therefore no jerking when starting or similar situations can occur. It has already been mentioned above that the cable run 12 runs in the pipe 2, specifically via centering and relief rollers 30, 31, 30 '. These centering and relief rollers 30, 31 are associated with star-shaped spacers 33, so that uniform support over the inner tube wall 3 is ensured.

The train module 22 is connected to the carriage 4 on the one hand and to the wiring harness 12 on the other hand via shaft joints 32, 32 ', so that a uniform movement in the central axis 17 of the tube 2 is achieved.

In the transition area 36, i. H. that is, in the shaft 34 and in the above-ground area 35, respectively, cable harness indents 37, 37 'and deflection rollers 38, 39 are provided. To make the guidance more uniform, smaller and larger deflection channels 39, 38 are provided in the transition region 36. In the aboveground area 35, on the other hand, larger deflection channels 38 are sufficient, which are each assigned correspondingly curved support arms 40, 40 '.

FIG. 2 illustrates that the cable harness intake 37 and the deflection tubes 38, 39 are arranged between the tube ends 42, 43, which are connected to one another via a telescopic slide 44, so that it can be supported on the tube ends 42, 43. The corresponding connecting tube 45 is designed to be telescopic, so that the respective cable harness intake 37 or the deflection tubes 38, 39 can be pushed into an optimal position.

The deflection tubes 38 assigned to the above-ground area 35 and the wiring harness intake 37 'are assigned to a truck platform 47, which enable an easy change of position for these parts.

FIG. 2 illustrates that the entire wiring harness 12 is pulled evenly through the drive modules, ie the wiring harness intake 37, 37 ', the corresponding rollers or drive rollers of these wiring harness feeds being switched so that the drives run at the same speed. This significantly reduces the forces caused by the deflections. FIG. 3 finally shows the discharge nozzle 7 in an enlarged representation, the mixer 6 being accommodated in the distributor or in the discharge nozzle 7. This discharge nozzle 7 has an inner bore 50 in which a cleaning needle 49 is arranged to be displaceable in the longitudinal direction. With the help of the rocker arm 58 and the air cylinder 57, this cleaning needle 49 is pushed through the inner bore 50 in the event of an interruption or at the end of the coating work in such a way that it protrudes slightly from the outlet opening 8. Then there is a response of the air nozzle 51, which ensures with its air jet that the materials which are brought in and mixed with one another via the material feed 52 cannot become lodged in the region of the outlet opening 8. After restarting the coating work, a completely clean and flawless spray pattern is available. Impairment or even clogging of the outlet opening 8 is excluded.

In the area of the discharge nozzle 7, a heater 55 is provided, here in the form of a ring, as a result of which the coating material is heated uniformly, even when the coating process is interrupted. Likewise, the housing 54 of the trolley 4 is also provided with heating, as is the rotary feedthrough 11. Thus, the two coating components are heated uniformly throughout the entire conveying path, so that an always intensive mixing, in particular also adherence to the specified quantities, is ensured ,

FIG. 4 shows a coating system 105 which is used in a tube 101 of small diameter. With the help of the coating system 105, a new coating 113 is applied to the inner wall 102, which prevents the wastewater guided in the pipe 101 from seeping into the underground 114.

The coating 113 should be applied so uniformly that the thickness of the coating is the same, which is achieved by all parts of the coating system 105 being guided exactly in the center of the center line 103. The sole 104 of the tube 101 serves as a type of roadway for the vehicle 106, which can be equipped with skids 107 or with other guide means. The vehicle 106 is moved by train via the wiring harness 108, this line line 108 is designed so that the components required for applying the coating 113 in the necessary and desired amount can also be fed to the rotating distributor 109.

The rotating distributor 109 forms the front end or the attachment of the spray head 110, this spray head 110 correspondingly rotating about its central axis 111.

The rotating distributor 109 is designed here in the form of a U-shaped support arm 112, which can be seen in particular from FIGS. 2 and 3. This U-shaped support arm 112 initially has the leg 115 with which it is fixed to the spray head 110 or parts assigned to it. It can be seen from FIG. 5 that the length of this leg 115 can be changed, either by means of the corresponding screw connection, which will be discussed further below, or by means of a corresponding guide in order to achieve telescoping.

The other leg 116, which adjoins the base leg 117, is shorter than the leg 115 and carries the mixer 120 with the outlet opening 118 and nozzle 119 in front of the head. In FIG. 5, screw connections are indicated with which the possibility exists of mixer 120 and To release nozzle 119 with outlet opening 118 from the base leg 117 if another appropriate attachment should be desired.

The displacement or change in the length of the leg 115 is possible because bores 122 are formed in groups 123 and 124 both on the leg 115 and on the spray head 110, which enable displacement and connection in different positions.

It is indicated in FIG. 5 that the leg 115 can also be formed in two parts in order to bring about a displacement from the center axis 111. However, FIG. 5 also makes clear in FIG. 6 that the fact that the mixer 120 with the outlet opening 118 and nozzle 119 are arranged offset with respect to the central axis 111 It is possible to change the spray path up to the inner wall 102 in accordance with the respective circumstances.

Figures 4 to 6 do not show details regarding the routing of the individual coating material components, because these details are not important in this context. Above all, however, it is made clear that with a relatively simple mixer 120 and the assignment of outlet opening 118 or nozzle 119 to base leg 117 or to center axis 111, there is a simple possibility of correction that reliably prevents the coating material 140 from rebounding from inner wall 102.

Figure 6 corresponds in principle to the embodiment according to Figure 4, only that the arrangement of the camera carriage 136 has been changed. In both representations, a counter-pulling device 126 is provided on the distributor side, specifically in the form of a pulling cable 127, which is fixed to the spray head 110 via a rotating frame 128. As a result of this assignment, the rotating frame 128 rotates at the same speed as the rotating distributor 109, so that the window 131 formed between the longitudinal struts 130 is always available and ensures that the coating material 140 discharged via the nozzle 119 is not hindered by the rotating frame 128 ,

The rotating frame 128 is fixed to the spray head 110 via the cross strut 129, so that the entire rotating frame moves with the spray head 110. On the cross strut 132, which is held at a certain distance above the longitudinal strut 130, a pivot bearing 133 is provided which, according to FIG. 5, enables a direct connection between the cross strut 132 and the pull cable 127. The pull cable 127 does not rotate with the rotating frame 128, so that the pull cable 127 cannot be untwisted or shortened.

4, the camera carriage 136 is fixed to the cross strut 132 via a pivot bearing 133 and the traction cable 127 is connected to the camera carriage 136, FIG. 6 provides that the traction cable 127 is attached directly to the pivot bearing 133 or the rotating frame 128. The camera carriage 136 is here over guide eyes 137 connected to the pull cable 127, so that it is moved together with the pull cable 127 in one or the other direction of travel. The comparison of FIGS. 4 and 6 shows that in the arrangement according to FIG. 4 it is possible to drive on pipes 101 of very small diameter, while after the design according to FIG. 6 the assignment of the camera carriage 136 to the pull cable 127 requires a larger diameter.

The camera carriage 136 is equipped with a lens 137, which is arranged directed towards the outlet opening 118 and the nozzle 119, so that the application of the coating material 140 to the inner wall 102 can be monitored and checked precisely. In this case, a protective mist 141 is generated via a protective blowing device 139, which ensures that spraying coating material 140 cannot endanger the lens 137.

While the traction cable end 138 according to FIG. 4 is fixed at the rear end of the camera carriage 136, according to FIG. 6 it is fixed directly onto the rotating frame 128. A type of pressure cylinder 142 with skids 107 is used as the vehicle 6 here, which lies correspondingly close to the inner wall 102 and thus enables a uniform movement or pulling through the wiring harness 108. At the opposite end of the pressure cylinder 142 from the wiring harness 108, the rotary feedthrough 143 can be seen, which enables the rotating distributor 109 and the spray head 110 to be rotated without the entire carriage or the pressure cylinder 142 being able to rotate with it.

FIG. 7 shows a high-pressure injection device 301 inserted into a gas line 305, the latter consisting of a carriage 4 and a module unit 303. The carriage 4 carries an inflatable packer 310, which is arranged to be movable on the inside of the tube 308 by guide rollers 326 arranged at the ends. With the help of the counter sleeve 325, it is also possible to make corrections, the supply line connecting to the opposite side of the carriage 4, which is not shown in detail here.

In the manner described, the trolley 4 with the module Unit 303 move into the area of a sleeve 306 and then positioned exactly in the area of the sleeve slot 307. This positioning of the trolley 4 or better said the module unit 303 is possible because a camera 324 is provided at the end of the trolley 4. This camera 324 can be pivoted and also rotated in such a way that it can check the position and also the condition of the sleeve 306 all around and also check it again after the sealing work has been completed.

The inflatable packer 310 has an inflatable jacket 311 which, according to FIG. 8, has an outer non-stick skin 322 which is practically non-porous. According to FIG. 8, the module unit 303 is integrated in this inflatable packer 310 or in its casing 311 in such a way that when the inflatable packer 310 is inflated, the discharge 316 with the nozzle 313 is lifted or shifted precisely into the area of the sleeve slot 307. Since at the same time the area on both sides of the sleeve slot 307 is effectively closed off by the wall or the jacket 311 of the inflatable packer 310, when a rapidly curing material is subsequently injected, it can only get into the sleeve slot 307 and the filling chamber 327 located behind it. This filling, or at least partial filling, of the filling chamber 327 and the sleeve slot 307 leads to the seal thus created effectively clawing, and indeed much better than the pipe seal 328 usually arranged in this area.

The pipe seal 328 takes effect automatically when the connecting pipe 329 is inserted into the sleeve 306. It goes without saying that it cannot always be ensured that this area is also effectively sealed in the long term, since this requires that the pipe seal 328 always have the same volume. The sealing surface of such a pipe seal 328 is also limited. However, if, according to the method, corresponding fast-reacting and hardening material is filled into the filling chamber 327 via the socket slot 37, an annular or annular sealing zone results which even extends around the front part of the connection 329, as is also particularly illustrated in FIG. 9.

FIG. 8 shows a section through the high-pressure injection device 301 in FIG Area of the module unit 303. This module unit 303 has the nozzle 313 or the discharge 316 and a cleaning needle 314 arranged displaceably therein via the cylinder 315. In addition, a heater 312 is accommodated in this area to ensure that the nozzle 313 optimal temperature, so that the flowing material not only mixes optimally, but can also react correctly with each other. This material is first mixed via the counterflow mixer 318 and then mixed and discharged through the nozzle 313. By further withdrawing the needle 314, an additional mixing chamber 319 can also be prepared and made available, so that if the mixing result is unsatisfactory, this can be optimized by withdrawing the needle 314 correspondingly far above the cylinder 315.

The module unit 303 is connected to the jacket 311 of the packer 310 via fastening screws 332. This fastening enables the entire module unit 303 to be removed by deleting the fastening screws 332 and replaced by another, for example one with an enlarged diameter of the nozzle 313 and the mixing chamber 319.

The needle 314 is held in a specific position via the needle holder 333, this position also being able to be adjusted or changed as required using an adjusting screw 334. It is thus ensured that the needle 314 always pushes out the material remaining in the nozzle 313 when the injection process is complete. The nozzle 313 is available for the next injection process.

The needle 314 is fixed via the needle holder 333 or the adjusting screw 334 in the piston rod 335, which can be displaced in the corresponding bore with the aid of the piston 337. A compressed air or hydraulic chamber is specified between the upper cylinder part 336 and the lower cylinder part 338, in which the corresponding piston 337 is displaceably arranged.

The inflatable packer 310, like FIG. 8 and also FIG. 9, is supported by a support tube 330 and inflated in such a way that the non-stick outer skin 322 adheres to the Pipe inside 308 tightly. It is only in the area of the outlet 316 that care is taken to ensure that this area of the module unit 303 is only moved to the inside of the pipe 308 with a limited pressure. This is achieved by providing an integrated stiffening 321, which is illustrated in particular in FIG. 8. The inflatable packer 310 therefore does not exert the full pressure force in this area, so that the quickly curable material to be discharged at high pressure via the nozzle 313 effectively reaches the area of the sleeve slot 307 and the filling chamber 327. The inflatable packer 310 or its wall 311 cannot deform into the sleeve slot 307; rather, it ensures a finish parallel to the inside of the pipe plan.

All of the features mentioned, including those that can be seen in the drawings alone, are regarded as essential to the invention, alone and in combination.

Claims

claims

1.Procedure for the internal coating of pipes and other elongated hollow bodies and sealing of the pipe connections via a carriage which can be moved longitudinally in the pipe and having a distributor, via which the components of the coating agent, which are brought up to it separately in a securing wiring harness, as a mixture of the Inner pipe wall are applied, whereby the coating work is continuously monitored and spray errors are corrected accordingly in one operation, characterized in that the trolley and the wiring harness are driven independently of one another, that the wiring harness is arranged over the length of the wiring harness centering and relief rollers arranged in the pipe and in Transition area is guided over drive and deflection rollers and that the trolley is guided in a rolling manner over the guide rollers assigned to the skids on the inner tube wall.

2. The method according to claim 1, characterized in that the area on both sides of the points to be sealed in the area of a pipe connection during the sealing work, preferably effectively sealed by a packer, that then quickly curing material is mixed and in the sleeve slot sealed against the pipe interior and the subsequent filling chamber is injected and then the discharge element of a mixing and discharge module unit is cleaned.

3. The method according to any one of the preceding claims, characterized in that in addition to the feed lines for the material components, the mixing and discharge module unit, but at least the discharge module, is heated, the temperature being 40 to 70 ° C.

4. Coating system for coating pipes (2) and elongated hollow bodies and sealing the pipe connections for carrying out the method according to claim 1 and / or the following claims, with a carriage (4) guided along the inner wall of the pipe (3), to which a distributor ( 5) with mixer (6) and discharge nozzle (7) and a camera carriage (10) is arranged downstream and which is connected via a rotary feedthrough (11) to a wiring harness (12) in which the component lines (13, 14, 15, 16) are stored separately and are heated with respect to the components and which is designed to be wound onto a drive drum (18) outside the tube (2), characterized in that the carriage (4) with guide rollers (19, 20) and a train module (22) is equipped which has drivable and / or braking drive wheels (23), that centering and relief rollers (30, 31) attached to the wiring harness (12) are distributed over its length and that In each case in the transition area (36) and in the aboveground area (35) a cable harness intake (37) and deflection pipes (38, 39) are provided.

5. Coating system according to claim 4, characterized in that the train module (22) is equipped with electric motors (25), preferably two electric motors and that the upper and lower part (26, 27) of the train module (22) drive and / or Guide wheels (23, 24) are assigned, which are designed to be braced against the inner tube wall (3), preferably via a pneumatic roller bar.

6. Coating system according to one of the preceding claims, characterized in that the cable harness intake (37) arranged in the transition region (36) with deflection rollers (38, 39) is a telescopic slide which can be braced between the pipe ends (42, 43) or in the shaft (34). 44) is assigned, which is connected to the pipe ends (42, 43) and has telescopic connecting pipes (45) and that the cable harness inlet (37 ') and deflection rollers arranged in the above-ground area (35) (38 ') are arranged mounted on a truck platform (47) and have drives which are designed to be switchable with those corresponding to the transition area (36), preferably workable at the same speed, the deflection tubes (38, 39) in the transition area ( 36) and on the truck platform (47) are assigned to a support arm (40) which is connected to the cable harness intake (37) and is designed to be curved in accordance with the intended deflection angle.

7. Coating system according to one of the preceding claims, characterized in that the rotating distributor (5) on the trolley (4) is arranged at right angles or approximately at right angles to the central axis (17) and with its outlet opening (8) relative to the central axis (17) of the Spray head (110) is arranged reset on a support arm (112).

8. Coating system according to one of the preceding claims, characterized in that the outlet opening (8) is assigned a cleaning needle (49) which is displaceable in the inner bore (50) of the outlet opening (8) and is arranged to clean it, and an air nozzle (51) which is designed to be approximately perpendicular to the spray jet (9) of the discharge nozzle (7) and is aligned with the outlet opening (8) and can be switched to blow-off when the end position is reached by the cleaning needle (49).

9. Coating system according to one of the preceding claims, characterized in that the rotating distributor (5) is designed to be heatable at least around the inner bore (50) and the material feed (52) and that the rotary feedthrough (11) and the housing (54) of the trolley (4) have heating.

10. Coating system according to one of the preceding claims, characterized in that the rotating distributor (109) has a U-shaped support arm (112), one of which, preferably telescopic leg (115) connected to the spray head (110) that is and its other leg (116) is shortened and the mixer (120) and outlet opening (118) is designed in front of the head, the leg (115) connected to the spray head (110) and the spray head (110) via groups (123 , 124) of bores (122) which can be positioned with one another resulting in a more or less large offset from the central axis (111).

11. Coating system according to one of the preceding claims, characterized in that the vehicle (106) has a counter-pulling device (126) on the spray head side in the form of a traction cable (127) which has a rotating frame (128) comprising the rotating distributor (109) with the Spray head (110) is connected, which rotates with the distributor (109) and leaves a window (131) for the outlet opening (118) and on the cross strut (132) facing the counter-pulling device (126) receives a pulling cable (127) Has pivot bearing (133).

12. Coating system according to one of the preceding claims, characterized in that the traction cable (127) is assigned a camera carriage (136) which has a camera with a lens (137) which is arranged facing the work section to be coated or just coated and that is equipped with a protective blowing device (139) which is arranged and constructed to produce a protective jacket (141) which protects the objective (137) against coating material (140) and spray mist.

13. Coating system according to one of the preceding claims, characterized in that the carriage (4) is assigned a module unit (303) designed as a mixing and discharge module unit, which with the jacket (311) of a blowing packer (310) assigned to the carriage (4). connected and which is equipped with a heater (312) and which has a counterflow mixer (318) and a discharge (316) in the form of a nozzle (313) with cleaning needle (314) and heater (312).

14. Coating system according to claim 13, characterized in that the cleaning needle (314) is dimensioned corresponding to the diameter of the nozzle (313) and is displaceably arranged in the nozzle (313) via a cylinder (315) and is adjustable in terms of its effective length.

15. Coating plant according to one of the preceding claims, characterized in that the jacket (311) of the inflatable packer (310) is formed in one piece in the connection area of the module unit (303) or has an integrated annular reinforcement (321), the length of which can be changed according to the intended use , wherein the jacket (311) is equipped with a largely non-porous, preferably replaceable non-stick outer skin (322).