DE29612962U1 - Device for lining pipelines, channels or the like. - Google Patents

Description

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HAUCK, GRAALFS, WEHNERT, DÖRING, SIEMONS

HAMBURG - MUNICH - DÜSSELDORF
K-39 939-19

PATENT- U, LAWYER, ■ NEUER WALL 41 20354 HAMBURG

1) GTH Umwelttechnik Service GmbH Hasselbusch 12A 22941 Bargteheide

2) PDS Eurotech Ltd.

5 Nottingham Close GB-Woolston, Warrington WAI 4QY

EDO GRAALFS, Dipl.-Ing. NORBERT SIEMONS, Dr.-Ing. HEIDI REICHERT, Attorney-at-law Neuer Wall 41, 20354 Hamburg PO Box 30 24 30, 20308 Hamburg Telephone (040) 36 67 55, Fax (040) 36 40 Telex 2 11 769 inpatd

HANS HAUCK, Dipl.-Ing. WERNER WEHNERT, Dipl.-Ing. Mozartstraße 23, 80336 Munich Telephone (089) 53 92 36, Fax (089) 53 12

WOLFGANG DÖRING, Dr.-Ing. Mörikestraße 18, 40474 Düsseldorf Telephone (0211) 45 07 85, Fax (0211) 454 32 Telex 8 584 044 dopa d

DELIVERY ADDRESS/PLEASE REPLY TO:

HAMBURG, 24 July 199

Device for lining pipes, ducts or the like

The invention relates to a device for lining pipelines, channels or the like according to the preamble of claim 1.

It is known that pipes, for example for sewage, but also gas and water pipes, can be renovated by lining the inner wall with a suitable plastic material. The material used can be an epoxy resin or polyurethane. The material, which consists of two components, is mixed immediately before being discharged, after which it hardens within a very short time.

Patent Attorneys ■ European Patent Attorneys ■ Authorized Representatives before the European Patent Office

Attorney: admitted to the Hamburg courts

Deucsche Bank AG Hamburg, No. 05 28497 (bank code 200 700 00) ■ Postbank Hamburg, No. 28 42 206 (bank code 200 100 20)
Dresdner Bank AG Hamhnro Nr QTi An -st &igr;&ogr;&iacgr;&ngr; inn orm nr«

To carry out the known method, it is known from EP O 334 870 to pull two hoses filled with the material through the pipe to be renovated. The hoses are pulled centrally through a centrifuge machine, which is moved forward in the pipe with the help of a pulling element and a pulling device arranged at the target end of the pipe. The hoses are cut open by the centrifuge machine so that the material can reach a mixing chamber via the pipe socket of the centrifuge machine. There, a mechanical mixing device ensures that the two components are mixed. The mixture is then centrifuged radially against the pipe wall with the help of a centrifuge plate. The mixing tools and the centrifuge wheel are each driven by separate air motors that operate at different speeds.

The known method has a number of disadvantages. The production of the material hoses is time-consuming. The length of the hoses must correspond exactly to the section of the pipeline to be covered. Short-term changes on the construction site are not possible. The material hoses are transported in temperature-controlled containers. Pulling the hoses into the pipeline is also complex and prone to damage.

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The weight of the ejected material in relation to the relatively thin hose skin only allows lining lengths of a maximum of 80 to 100 m. With a longer length, there would be a risk that the hoses would tear due to excessive weight.

Pipelines that have changes in direction cannot be lined because the material hoses would overlap in the pipe bend and cause the centrifuge machine to topple over. The diameter of the material hoses determines the thickness of the lining layer and cannot be varied during the centrifuge process.

The invention is based on the object of creating a device for lining pipelines, channels or the like, with which even longer distances can be lined with less effort, and with variable layer thicknesses.

This object is solved by the features of claim 1.

In the device according to the invention, the supply lines for the centrifuge are designed for high pressure.

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material is firmly connected to the centrifuge machine and is driven forward with it. Accordingly, the supply lines are wound up in a winding device so that their ends move along with the advance of the centrifuge machine. The other ends of the supply lines are each connected to a pressing cylinder in which the components of the material to be centrifuged are located. The pressing cylinders work together with a pressing piston driven by a corresponding drive, which presses the components into the centrifuge machine under high pressure while the centrifuge machine is being driven forward, where the components are then mixed and centrifuged out. The pressing unit is located at the target end of the pipeline.

The device according to the invention has significant advantages. There is no need to pre-assemble hoses containing the components, as is the case with the known method. The centrifuge machine can therefore be inserted into the pipeline within a very short time. The preparatory work is kept to a minimum. Changing the section of pipeline that is initially being renovated is completely unproblematic. Neither the lining length nor the pipe diameter are a problem.

The thickness of the lining layer in the device according to the invention is a function of the speed of the piston drive and the advance speed of the centrifuge machine. Therefore, according to one embodiment of the invention, the advance speed is controlled by the drive speed of the piston drive. However, it is possible to vary the ratio between the two speeds in order to vary the lining thickness if necessary, for example in the case of missing pieces in the pipe, sleeves, branches, in the case of severe corrosion, etc.

In case of problems, the lining process can be interrupted with the device according to the invention. Recovering the centrifuge machine and the supply lines is not a problem. After the lining process has been completed, no auxiliary materials need to be removed from the pipeline.

Preferably, the squeezing cylinders have the same cross-section and the squeezing pistons are driven synchronously, so that a desired mixing ratio is guaranteed during the entire lining process.

In the known device, a pneumatic drive is used in the centrifuge machine. A pneumatic

A pneumatic drive is also provided in the device according to the invention. According to one embodiment of the invention, it is supplied by a compressed air line that is introduced into the pipe from the starting end and is guided axially through a centrifuge wheel into the interior of the centrifuge machine. According to a further embodiment of the invention, the centrifuge wheel is arranged at the rear end of the centrifuge machine, as seen in the direction of advance, and the mixing chamber is located in front of the centrifuge wheel. Accordingly, the preferred arrangement of the pneumatic drive is in front of the mixing chamber, with the centrifuge wheel and mixing tools preferably being driven jointly by one drive.

In another embodiment of the invention, the compressed air line can be wound up on a winding device at the starting end of the pipeline, and the winding device serves as a brake when the centrifuge machine is driven forward. This ensures that the centrifuge machine can be pulled smoothly and thus that the lining layer thickness is even.

According to another embodiment of the invention, a TV camera can be mounted on the compressed air line near the ejection

machine that allows monitoring of the spinning process via a remotely mounted monitor in the direction of the spinning wheel.

After the spinning process has been completed, the supply lines are disconnected from the spinning machine and sealed airtight. The device according to the invention can be immediately made available for the next lining process.

The invention is explained in more detail below with reference to drawings.

Fig. 1 shows schematically the device according to the invention in operation.

Fig. 2 shows part of the device at the target end of the pipeline to be rehabilitated.

Fig. 3 shows a part of the device according to Fig. 1 at the starting end of the pipeline to be rehabilitated.

Fig. 4 shows a section through the centrifuge of the device according to Fig. 1.

Fig. 5 shows a section through the centrifuge machine according to Fig. 1, rotated by 90° compared to Fig. 4.

In Fig. 1, a pipeline to be renovated is designated 10. It can be a sewage pipeline, for example. As can be seen, a first shaft 12 and, at a distance from this, another shaft 14 lead to the pipeline 10. The shafts 12, 14 are referred to below as the starting shaft and the target shaft, respectively. In Fig. 1, the section of the pipeline 10 between the shafts 12 and 14 is shown in abbreviated form in order to better illustrate the process that is still to be described.

Near the starting shaft 12 there is a first vehicle 16 which has a winding device 18 for a compressed air line 20, indicated by dashed lines. A compressor 22 on the other side of the shaft 12 serves to supply the line 20 with compressed air. A second vehicle 24 near the target shaft 14 has a winding device 26 for two pressure hoses, one of which is shown at 28. A winch for a wire rope is also arranged on the vehicle 24. The wire rope (not shown) and the pressure hoses 28 lead to an ejector machine 30 in the pipeline 10, which is on the other side

end is connected to the compressed air line 20. A TV camera 3 2 is attached to the compressed air line 20 near the ejection machine 3 0. The compressed air line 20 is introduced into the pipeline 10 via a deflection device 34 on the bottom of the shaft 12. A corresponding deflection device 3 6 for the pressure lines and the traction cable is located on the bottom of the shaft 14.

The vehicle also contains a pressing unit 38, which is connected to the pressure lines 28. Details of the parts shown can be seen in Figures 2 to 5.

In Fig. 2, the vehicle 24 is shown with the system components located on it. It can be seen that the press unit 38 has two press cylinders 40, 42, each of which contains a component of a curable polyurethane or the like. Press cylinders 40, 42 are assigned press pistons 44, 46, which are driven synchronously by a drive (not shown). The cross-section of the cylinders 40, 42 is the same. The lower end of the cylinders 40, 42 is connected to a line 28 each, which is wound on the winding device 26. Such a connecting line is shown at 48. By closing a valve 50, the supply of the components to the lines 28 can be stopped.

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The vehicle 24 also has a winch 52 for the traction cable, which is guided parallel to the lines 28. The vehicle 24 also has a control station 54, which has, for example, a monitor 56 for displaying the image recorded with the camera 32. Drives for the cable winch, the winding device 26 and the pistons 44, 46 are not shown or designated in detail. They are also located on the vehicle 24.

In Fig. 3, the vehicle 16 is shown with the parts accommodated. The winding device with hose reel can be seen, as can the corresponding drive for the hose reel for the purpose of unwinding or winding the compressed air hose 20, which is inserted into the shaft 12. The vehicle 16 also has a control room 60 for the functions to be carried out on the vehicle 16.

The centrifuge machine 30 is shown in more detail in Figures 4 and 5. Fig. 4 shows the top view in section of the centrifuge machine according to Fig. 1. Fig. 5 shows the side view in section. The housing of the machine 30 contains a carriage 62 on which the machine 30 can be moved along the bottom of the pipeline 10. The

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Forward movement is carried out with the aid of a traction cable, which is indicated at 64 in Fig. 1 and is attached to the housing or frame of the machine 30 via a fitting 66 in Figures 4 and 5. The feed direction is therefore according to arrow 68 in Fig. 1, i.e. from left to right in the drawings.

Coming from the starting shaft 12, the compressed air line 20 is introduced centrally into the machine 30 and is connected from the front (seen in the direction of advance) to an air motor 70 which drives a pinion 72. The pinion 72 drives a central gear 74 which sits on a hollow shaft 76. The hollow shaft is supported in the machine 30 by suitable roller bearings, which will not be described in more detail. The hollow shaft 76 extends to the left to a centrifuge wheel 78, the flange of which is connected on the right-hand side to axially parallel mixing tools 80 which are located within a mixing chamber 82. The mixing chamber 82 is connected to two diametrically opposed channels 84, 86 which open diametrically opposite into an inlet area 88 for the mixing chamber 82 (see Fig. 4). The channels 84, 96 can be coupled to the supply lines 28 at 90 and 92 respectively.

The operation of the described device is as follows.

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After cleaning work has been carried out in the pipeline 10, the vehicle 24 is positioned correctly in relation to the target shaft 14. The vehicle 16 is positioned in the same way in relation to the starting shaft 12. The material lines 28 are coupled to the ejector machine 30 via the high-pressure couplings 90, 92. On the vehicle 16 there is a winch for a wire rope, which is previously guided via the shaft 12 and the pipeline 10 and the shaft 14 to the vehicle 24 using a device not shown and is then attached to the ejector machine. With this wire rope and the lines 28, the ejector machine 30 is lowered into the shaft 14 down to the floor. The ejector machine 30 is then moved to the target shaft 12 using the winch in the vehicle 16, with the wire rope 64 having previously been attached to the ejector machine 30 after it was lowered to the floor. The forward movement of the ejector machine 30 to the left takes the material hoses 28 and the traction cable with it to the starting shaft 12.

The air hose 20 is coupled to the ejector machine 30 at the bottom of the starting shaft 12. The TV camera 32 is installed on the air hose 20 at a distance of about 80 to 100 cm. The compressor 22

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is put into operation and supplies the centrifuge machine 30 with compressed air.

The air motor 20 begins to rotate and turns the mixing tools 80 and the impeller 28 at high speed. There is an idle phase of approximately 60 seconds. The winding device 26 and the winch 52 are at a standstill. The pressing unit 38 is then put into operation. At the same time, the winch 52 and the winding device 26 begin to rotate depending on the previously defined pressing speed of the hydraulic pressing unit 38. The centrifuge machine 30 moves in the advance direction 68 from the starting shaft 12 to the target shaft 14. The centrifuge material is pressed into the mixing chamber 82 via the channels 84, 86. After forced mixing at high speed in the mixing chamber 82, the mixed centrifuge material reaches the centrifuge wheel 28 rotating at high speed, from where it is thrown against the wall of the pipeline 10 by centrifugal force. The thickness of the layer depends on the extrusion speed of the extrusion unit 38 and the pulling speed of the winch 52. The setting process of the extrusion material begins as soon as it leaves the mixing chamber 82, whereby the extrusion

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Centrifugal material has already hardened on the pipe wall after 90 seconds after centrifuging. In this way, the centrifuging machine 30 is pulled forward to the target shaft 14 until the centrifugal wheel 30 has reached the inlet of the pipeline 10 into the shaft 14.

If a thicker or thinner layer of the squeezing material is required in parts of the pipeline 10 during the described renovation, this can be done under observation with the camera 3 2 by changing the squeezing speed of the squeezing unit 38 with a subsequent rotation speed of the winch 52 and the winding device 2 6.

When the ejector 30 reaches the target shaft 14, all the functions described are stopped. The air hose 20 is uncoupled from the ejector 30 and pulled back to the starting shaft 12 together with the camera 10. The camera 32 is dismantled and the air hose 20 is wound up on the winding device 18 and secured. The ejector 30 is pulled out of the target shaft 14 to the surface using the winch 52. The material hoses 28 are uncoupled and their ends closed. The hoses 28 are

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the winding device 26 is wound up and secured. This completes the spinning operations for the pipeline 10 and the entire device is ready for the next spinning operation.

It is conceivable to use pumps for the media instead of the squeezing cylinders, whereby sufficient pressure must be available as well as a sufficiently precise dosing option. However, there is a risk that the output pressure will fluctuate depending on the frequency of the pump, which can lead to an uneven distribution in the pipe.

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Claims (8)

- 16 claims : 1. Device for lining pipelines, channels or the like with a mixed material consisting of two components, with a centrifuge machine which contains a mixing device for mixing the components, a centrifuge device for centrifuging the mixed material against the wall of the pipeline and a drive device for the mixing and centrifuge device, a pulling device which advances the centrifuge machine from the start end to the target end of the pipeline via a pulling element guided through the pipeline, a power supply line guided through the pipeline for the drive device and two supply lines which feed the components to the centrifuge machine during its advance, characterized in that the ends of the supply lines (28) designed for high pressure are firmly connected to the centrifuge machine (30) and are advanced with the advance of the centrifuge machine (30), the supply lines (28) being wound up with the aid of a winding device (26) arranged near the draw shaft (14). wound up, the other ends of the supply .../17 lines (28) are each connected to a pressing cylinder (40, 42) of a pressing unit (38) which is arranged in the vicinity of the target shaft (28) and with which a piston (44, 46) driven by a piston drive interacts. 2. Device according to claim 1, characterized in that the squeezing cylinders (40, 42) have the same cross-section and the squeezing pistons (44, 46) are driven synchronously. 3. Device according to claim 1 or 2, characterized in that the drive speed of the piston drive controls the propulsion speed of the centrifuge machine (30). 4. Device according to one of claims 1 to 3, characterized in that the drive device in the centrifuge machine (30) is a pneumatic drive (70) which is supplied via a compressed air line (20) and the compressed air line (20) is introduced from the starting end (12) into the pipeline (10) and is guided axially through a centrifuge wheel (78) into the interior of the centrifuge machine (30). .../18 5. Device according to claim 4, characterized in that the centrifugal wheel (78) is arranged at the rear end of the centrifuge machine (30) as seen in the direction of advance and the mixing device (80) is driven by the centrifugal wheel (78). 6. Device according to claim 5, characterized in that the impeller (78) and mixing tools (80) in the mixing chamber (82) are jointly driven by a single drive (70) located in front of the mixing chamber (82). 1. Device according to one of claims 4 to 6, characterized in that the compressed air line (20) can be wound onto a winding device (18) at the starting shaft end (12) of the pipeline (20) and the winding device (18) acts as a brake when unwinding the compressed air line (20). 8. Device according to one of claims 1 to 7, characterized in that a TV camera (32) is arranged on the compressed air line (20) in the vicinity of the centrifuge machine (30).