Device for machining inner surfaces of pipelines

Abstract

The invention relates to a device for machining inner surfaces of pipelines, the device having a drum (1) which can be rotated by means of a drive device and on which a cable can be wound and unwound in a region between an inner ring (2) and an outer ring (3) of the drum, the cable being guided movably in a cable sheath, and the start of the cable being attachable to a crank and the crank being movable by means of a drive unit in order to rotate the cable within the cable sheath, and the device having a frame structure (4) which surrounds the drum (1), characterised in that the frame structure (4) is composed of a plurality of frame elements (5) and some of the frame elements (5) can be separated from one another and reconnected to one another in order to allow the drum (1) to be removed from the frame structure (4).

Description

Device for machining internal surfaces of pipelines Description

[0001] The invention relates to a device for machining internal surfaces of pipelines.

[0002] Devices for machining the internal surfaces of pipelines, in which the force is transmitted to a tool positioned at the head of the cable by the rotating movement of a cable, are known in the prior art.

[0003] Such devices are disclosed in DE 20 2011 109 885 U1 and DE 20 2011 109 887 U1. In these embodiments, a cable is wound on a drum rotatable by an electric motor. Depending on the direction of rotation of the drum, the cable is either unwound from the drum or wound onto the drum. In these embodiments, the drum consists of an inner and an outer ring, between which the cable is guided. The drum is located within a rigid frame made of metal tubes or metal rods. In these embodiments, the frame is designed like a trolley, i.e., wheels and a shaft are provided on the frame to facilitate moving the device.

[0004] A disadvantage of these devices known in the prior art is that transporting the device through narrow openings or over steep stairs and ladders is difficult and sometimes not possible at all, since the device is very heavy and its individual parts cannot be disassembled.

[0005] Furthermore, the device can only be operated with one drum in a given configuration. Adapting the device to applications requiring a larger drum with a longer cable or a smaller drum with a shorter cable is not possible. Therefore, the user of the device must configure several configurations for different applications. devices with different designs of drums and cables.

[0006] Based on this prior art, the invention has set itself the task of providing a device in which the drum can be removed from the frame quickly and easily in order to be able to use several drums with cables of different lengths with the same device.

[0007] In addition, the device should be easy to disassemble into several individual parts and then reassemble, making it easier to carry by one person and move it up steep stairs or ladders. The device should also be easier to transport through narrow passageways or hatches.

[0008] The invention solves this problem with the features of claim 1.

[0009] In the embodiment of the device according to the invention, the frame structure is composed of several frame elements. Some of these frame elements forming the frame structure are designed so that they can be separated from one another and reconnected to enable the drum to be removed from the frame structure.

[0010] The frame structure can, for example, be formed from 10 or 12 interconnected frame elements. For example, in the 10-part frame structure, two side elements, each consisting of four frame elements, can be connected to each other by two intermediate elements. The 12-part version has the shape of a cube, with the frame elements connected to each other at the corners where three frame elements meet.

[0011] With the 10-part frame element, it is particularly advantageous if the two intermediate elements connect the two side elements formed by four frame elements. This design offers the greatest strength, since only two of the ten frame elements need to be separated from each other, while all the remaining frame elements can remain firmly connected.

[0012] In the 12-part version of the frame scaffold, at least four frame elements can be separated from each other and reconnected. Preferably, two frame elements on opposite sides of the frame scaffold are designed accordingly. This makes it possible to disassemble the frame scaffold into two parts to gain access to the drum of the device.

[0013] In a preferred embodiment of the invention, the frame consists of several frame elements arranged at an angle to one another. The frame elements thus form a cubic structure enclosing the drum of the device. Some of these frame elements are designed in two parts, so that the two parts of these frame elements can be separated from one another and reconnected. If the frame elements are tubular elements, the ends of the two parts can be inserted into one another to connect the frame elements.

[0014] If the frame structure is to be enlarged to accommodate a larger drum, a further embodiment of the invention provides for spacers to be inserted into the two-part frame elements, and the spacers are releasably attached to the respective ends of the two-part frame elements. Preferably, both the two-part frame elements and the spacers are tubular elements whose ends can be inserted into one another.

[0015] To enable a secure connection between the frame elements and between the frame elements and the spacers, advantageous embodiments of the invention provide for the frame elements and / or the spacers to have holes through which either a screw or a cotter pin can be inserted when the frame elements and / or the spacers are inserted into one another. To secure this connection, a wing nut can be screwed onto the screw or the ends of the cotter pin can be widened.

[0016] In another embodiment of the invention, some of the frame elements are telescopic. This allows the length of the frame elements to be adjusted so that the drum can be removed from the frame structure and a new drum can be inserted. After inserting the drum, the telescopic frame elements can be pushed back into one another until a frame structure is formed that completely encloses the drum.

[0017] In order to prevent a change in the length of the telescopic frame elements, a preferred embodiment of the invention provides that the telescopic frame elements have holes into which one or more locking elements can engage. It is provided that the locking elements are subjected to a spring force so that they can be easily pressed down and, as soon as the locking element reaches the area of ​​a hole, they are reinserted into the hole by the spring force.

[0018] This telescopic variant can be used with both one-piece and two-piece frame elements.

[0019] In an alternative embodiment of the device according to the invention, a hinge is provided on at least one of the frame elements and a locking device is provided on at least one other frame element. In a first position, both the hinge and the locking device are closed. In this position, the drum of the device is completely enclosed by the frame structure. As soon as the locking device is opened, a part of the frame structure can be pivoted via the hinge into a second position in which the drum can be removed from the frame structure. In this embodiment, the upper part of the frame structure can preferably be completely opened up from the lower part of the frame structure so that the drum located in the frame structure can be removed.

[0020] In a further advantageous embodiment of the device according to the invention, the drum is releasably mounted on a turntable connected to the drive device. In this embodiment, the turntable is moved by the drive device. The drum is a separate component from the turntable and can be releasably attached to the turntable using fastening elements. This ensures that the drum can be more easily separated from the device, since the drum is not directly connected to the drive unit, thus eliminating the need to separate the drum from the drive unit.

[0021] In an advantageous embodiment, the inner and outer rings of the drum are arranged on a support element having a plurality of openings. Several fixing elements are attached to the turntable, which can engage with the openings in the support element of the drum. In this way, the drum is held in a predetermined position on the turntable. Consequently, when the turntable is set in motion by the drive unit, the drum fixed to the turntable rotates with it, allowing the cable wound on the drum to be wound in or out as desired.

[0022] In a further development of this embodiment, it is provided that the carrier element of the drum in the area inside the inner ring at least has a further opening. Another fastening element arranged on the turntable engages through this opening. In this embodiment, the fixing elements serve only to fix the position of the drum on the turntable, so that the drum can be removed from or placed on the fixing elements. The fixing element, on the other hand, serves to releasably connect the turntable and the drum. In this embodiment, the fixing element must first be loosened before the drum can be removed from or placed on the turntable.

[0023] In a preferred embodiment, two decentralized openings are provided in the area within the inner ring of the drum, into which two fastening elements with a screw thread arranged on the turntable can engage. If a wing nut is then screwed onto the fastening elements with the screw thread, the drum and the turntable are firmly connected to one another. The wing nuts allow the drum to be separated from the turntable quickly and easily without tools, in order to enable the drum to be replaced with another drum. The same applies if the drum and the rest of the device are to be transported separately from one another in order to pass through narrow passageways or hatches or to enable the drum and device to be transported on narrow stairs or ladders.

Claims

Device for machining internal surfaces of pipelines Patent claims 1. Device for machining the inner surfaces of pipelines, comprising a drum (1) which can be rotated by means of a drive device and on which a cable can be wound and unwound in a region between an inner ring (2) and an outer ring (3) of the drum, the cable being movably guided in a cable sheath, the beginning of the cable being attachable to a crank, and the crank being moveable by means of a drive unit in order to rotate the cable within the cable sheath, and a frame structure (4) surrounding the drum (1), characterized in that the frame structure (4) is composed of a plurality of frame elements (5), and some of the frame elements (5) can be separated from one another and reconnected to one another in order to enable the drum (1) to be removed from the frame structure (4).

2. Device for machining internal surfaces of pipelines according to claim 1, characterized in that the frame structure (4) consists of several frame elements (5) arranged at an angle to one another and some of these frame elements (5) are divided into two parts. lig and the two parts of these frame elements (5) can be separated from each other and reconnected.

3. Device for machining internal surfaces of pipelines according to claim 1 or 2, characterized in that intermediate pieces (6) are inserted into the two-part frame elements (5) and the intermediate pieces (6) can be releasably fastened at the ends to the ends of the two-part frame elements.

4. Device for machining inner surfaces of pipelines according to claims 1 to 3, characterized in that the interconnectable frame elements (5) have a bore through which a screw can be passed through the bores of adjacent frame elements (5) and the frame elements can be fixed with a wing nut.

5. Device for machining inner surfaces of pipelines according to one of claims 1 to 3, characterized in that the interconnectable frame elements (5) have a bore through which a split pin can be passed through the bores of adjacent frame elements (5) and the frame elements (5) can be fixed by widening the end of the split pin.

6. Device for machining internal surfaces of pipelines according to one of claims 1 to 5, characterized in that some of the frame elements (5) are telescopic.

7. Device for machining internal surfaces of pipelines according to claim 6, characterized in that the telescopic frame elements (5) have bores into which a locking element can engage.

8. Device for machining inner surfaces of pipelines according to one of claims 1 to 7, characterized in that a hinge is provided on at least one of the frame elements (5) and a closure device is provided on at least one frame element (5), and that a part of the frame structure (4) can be pivoted from a first position, in which the closure device and the hinge are closed, after opening the closure device via the hinge into a second position, in which the drum (1) can be removed from the frame structure (4).

9. Device for machining internal surfaces of pipelines according to one of claims 1 to 8, characterized in that the drum (1) is detachably fastened to a turntable (7) connected to the drive device.

10. Device for machining inner surfaces of pipelines according to claim 9, characterized in that the inner ring (2) and the outer ring (3) of the drum (1) are arranged on a support element (8), that the support element (8) has a plurality of openings (9) and that a plurality of fixing elements (10) are fastened on the rotating disk (7) and can engage in the openings (9) in the support element (8) of the drum (1).

11. Device for machining inner surfaces of pipelines according to claim 10, characterized in that the carrier element (8) of the drum (1) has at least one further opening (11) in the area inside the inner ring, through which a further fastening element (12) arranged on the turntable (7) can engage and with which the turntable (7) and the drum (1) can be detachably connected to one another.

12. Device for machining inner surfaces of pipelines according to claim 11, characterized in that in the area of ​​the surface inside the inner ring (2) of the drum (1) two decentralized openings (11) are provided, into which two fastening elements (12) arranged on the turntable (7) with a screw thread can engage and on which the drum (1) and the turntable (7) can be fixed by wing nuts.

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