WO2010145737A2

WO2010145737A2 - Device and method for cleaning pipes and channels

Info

Publication number: WO2010145737A2
Application number: PCT/EP2010/002913
Authority: WO
Inventors: Helmut Rothenberger
Original assignee: Rothenberger Ag
Priority date: 2009-06-19
Filing date: 2010-05-11
Publication date: 2010-12-23
Also published as: WO2010145737A3; DE112010002584A5; DE102009025528A1

Abstract

The invention relates to a device and a method for cleaning pipes and channels by means of pressurized water and rotatable tools (11), comprising a connection part (2) for a pressurized water line, which connection part comprises a pivot bearing (5a) and is provided with a tool head (6), which can be rotated relative to the pivot bearing (5a) and can be set in rotation by rotary nozzles. In order to achieve the aim of not destroying any energy by intentional whirl and/or friction and possibly using a pressure hose having or not having a spring shaft and nevertheless being able to drill open blockages, the connection part (2) is or will be provided with propelling nozzles (3) and the tool head (6) is or will be provided with a coupling part (10) at the front end of the tool head for fastening rotatable tools (11) protruding in the axial direction.

Description

Apparatus and method for cleaning pipes and channels

The invention relates to a device for cleaning pipes and channels by means of pressurized water and rotatable tools, with a connection part for a pressurized water line, which has a pivot bearing and which is provided with a rotatable relative to the pivot bearing tool head, which can be set by rotation nozzles in rotation.

By the US-PS 3,370,599 it is known at the end of a combination of a spring shaft and a pressure hose guided therein rotationally to arrange a working head for the breaking up of contaminants in sewers, such recordable as penetrated plant roots. The working head has except rotary knives an axially forwardly directed cleaning nozzle and three obliquely backward feed nozzles, which should support the feed by the spring shaft, but can not support rotation because of their arrangement in axially parallel and radial planes. The pressure hose and the spring shaft may consist of about 30 m long sections, which are assembled by means of couplings. The stockpiling and the drive require a drum with a very complex coupling for the supply of pressurized water and a structure with a rotary drive on a trailer. The essential difference of the subject invention is that no spring shaft with rotary couplings and no drum are needed that the rotation of the working head from finally hydraulically through nozzles with recoil components in the circumferential direction and that at the end of the working head via a clutch different broaching tools can be attached.

By US-PS 5,933,903 a similar arrangement with a combination of pressure hose and spring shaft is known in which at the front end of a synchronously driven by the Fedsrweüe nozzle head a replaceable cutting tool and the feed jet nozzles are arranged opposite to the breaking of the Impurity and backwashing of the particles.

The above solutions, however, forcibly require a synchronous drive of the spring shaft and nozzle head, in which the spring shaft plays a crucial role. It inevitably has the effect of a thread or a screw whose course is pressed by their rotation in the pipeline and against their contamination. The "mating thread" thereby form a complex feed mechanism on the drive machine as well as edges and other irregularities within the pipeline, on which the spring shaft is supported. This can lead to breakage of the spring shaft within the pipeline, so that an operator must follow the course of the spring shaft optically and mechanically by scanning and guiding by hand.

By EP 1 886 733 A1 it is known in a hydraulic cleaning device to connect a pressurized water line with a nozzle body on which by means of a shaft a rotatable nozzle head is mounted, which is provided at its periphery with nozzles whose oblique axes water jets with force components generate in the circumferential direction. To reduce the speed while a friction brake is arranged between the shaft and the nozzle body, which consists of at least two hydraulically pressed against each other rings. It is assumed that the task of making the speed of the fluid pressure independently. The effect should, inter alia, be based on a turbulence of the water, whereby naturally inevitably a part of the flow energy for the hydraulic cleaning is converted into heat and thus destroyed. One of the brake discs should even be made of ceramic and be roughened. The pressure range should be between 50 and 300 bar, and the friction brake should also have a sealing function. Mechanical cleaning tools are not addressed here, and a backflow effect for the nozzle feed is also minimized by the throttling action of the brake rings, and only excess pressurized water flows backward through channels. Also on the use of a Federwelie is no indication.

The invention is based on the object to provide an apparatus and a method in which no energy is destroyed by deliberate turbulence and / or friction, and which are not dependent on a mechanical drive by a spring shaft, where it is optionally possible, a pressure hose to use with or without a spring shaft, and with which blockages can be broken and flushed out, such as Deposits due to construction waste from binders and plant roots penetrated by joints. Also, the rotations of the broaching tool should be mechanically decoupled from any spring waves used, so that it may be possible to destroy blockages by rotation "on the spot".

The solution of the task is carried out in the device according to the invention initially characterized in that the connection part is provided with thrusters and the tool head at its front end with a coupling part for the attachment of axially projecting rotatable tools.

It is particularly advantageous in the course of further embodiments of the device, if - either individually or in combination -:

* the connection part has a cavity, which is connected gap-free with a coupling for the connecting line and from which the thrusters with an axial thrust component for propulsion of the tool, * the connecting part has a pipe socket on which an intermediate piece is rotatably mounted with an annular chamber into which pressurized water from the pipe socket can be introduced, and when from the annular chamber run out of rotary nozzles, through which the intermediate piece is set in rotation,

* the intermediate piece is rotationally connected to the tool head,

* The pipe socket is connected via radial bores with the annular chamber,

* the intermediate piece is rotatably mounted on the pipe socket by a bearing ring and a screw connection,

the tool head is provided with a coupling part at its front end,

* The coupling part is provided with a T-shaped extension for the radial sliding of a guide on the tool, and / or, if

* form the Werkzeugkopt and the intermediate piece a separable functional unit.

The invention also relates to a method for cleaning pipes and channels by means of pressurized water and rotary tools, wherein the pressurized water is supplied via a pressurized water line to a connecting part with a rotary bearing, and wherein on a rotatable relative to the rotary bearing tool head, a torque is transmitted.

To achieve the same object and to achieve the same advantages, such a method is characterized in that impurities in the pipes and channels are broken down into particles by means of a tool attached to the front end of the tool head and washed away by means of the pressurized water, and that the tool passes out of the connection part with an axial force component to the rear escaping pressurized water is further advanced against the impurities. It is particularly advantageous in the course of further embodiments of the method if, either individually or in combination:

the pressurized water in the connecting part is introduced into a hollow space which is connected without gaps to the coupling for the connecting line and is introduced into the thrust nozzles from the cavity, which generate an axial thrust component for propelling the tool (11),

* The pressurized water from the connection part is introduced into a pipe socket and fed to it from an intermediate piece with an annular chamber and is supplied from these rotary nozzles, which rotate the intermediate piece, and / or, if

* The pressurized water from the pipe socket is introduced via radial bores into the annular chamber.

An embodiment of the subject invention and its modes of action and other advantages are explained below with reference to Figures 1 and 2 in more detail.

Show it:

Figure 1 shows an axial section through a complete cleaning tool and

2 shows a radial section along the plane E-E in Figure 1 on an enlarged scale.

In Figures 1 and 2, 1 with a coupling for a hose end, where appropriate enveloped by a spring shaft, which are known per se and therefore not shown. The coupling 1 is connected to a connection part 2, which has a cavity 2a. From this go at least two equidistantly distributed on the circumference of the exhaust nozzles 3, whose axes at the same acute angle to the axis A ausge- are directed and are ejected by the water jets 4. The connecting part 2 merges into a coaxial pipe socket 5, which forms a pivot bearing 5a for a rotatable tool head 6. Between the connection part 2 and the tool head 6 there is an intermediate piece 7, which is screwed in a rotationally fixed manner to the tool head 6 and has a coaxial annular chamber 7a into which two radial bores 5b in the pipe socket 5 open (FIG. 2). The axial guidance of the intermediate piece 7 is effected by a bearing ring 8 and a screw 9. The tool head 6 has a first coupling part 10 with a T-shaped extension 10 a, on the diametrically and interchangeable a tool 1 1 is pushed with a corresponding guide 11 a ,

All parts to the left of a parting line 12 are rotatably mounted together on the pipe socket 5, due to water jets 13 emerging from rotary nozzles 14 whose axes aligned with a tangential direction component and - equidistantly distributed on the circumference - arranged in the radial sectional plane EE are.

The tool 11 is designed here as a leaf drill; but it comes depending on the type of constipation, a variety of tools in question, such as cross-blade drill bits, bucket wheel, root cutter, sawtooth cutting heads, ball cutter and chain-type centrifugal heads, to name just a few. Such works and their functions are known per se.

As regards the effect and function of the subject invention, the following is carried out: As soon as the pressure from the pressurized water line is present in the cavities of the connecting part 2, this communicates with the thrusters 3 and the rotating nozzles 14 of the tool head 6. As far as the hydraulic forces are to be considered, these depend on the sum of the cross sections of the nozzles and the sum of the back pressures from the contaminated liquid outside the cleaning tool, ie from the pressure differences and the directions of the exiting water jets 4 and 13, respectively taking into account the direction of movement. These are at the feed nozzles 3, the components of the pressure differences in the direction of the rotary and tubular axis and at the rotation nozzles 12, the components of the pressure differences in the circumferential direction. In contrast, the mechanical braking forces of the respective tool 11 counteract the dismantling of the blockages and the hydraulic opposing forces by the swirling of the tube contents on the tool 11.

This results in a combination effect that is not affected by internal forced braking with high heat generation, but automatically adjusts itself with a high efficiency, but which can be influenced by the selection of interchangeable tools 11. The thereby influenceable mechanical braking effect can be optimized. If, nevertheless, a festging of the tool 11, this can be canceled by a train on the pressure hose and / or by a pressure interruption, since in this case only the force of the feed nozzles 3 must be overcome. The speed increases again, so that the clearing process begins again at the blockage. The full power of speed and torque is now available again.

LIST OF REFERENCE NUMBERS

1 clutch

2 connection part 2a cavity

3 thrusters

4 water jets

5 pipe socket 5a rotary bearing 5b holes

6 tool head

7 spacer 7a annular chamber

8 bearing ring

9 screw connection 10 coupling part 10a extension 1 1 tool

11a leadership

12 parting line

13 water jets

14 rotating nozzles

A axis

E-E level

Claims

claims:

1. A device for cleaning pipes and channels by means of pressurized water and rotatable tools (11), with a connection part (2) for a pressurized water line having a pivot bearing (5a) and with a relative to the pivot bearing (5a) rotatable tool head (6) is provided, which is set into rotation by rotary nozzles (14), characterized in that the connecting part (2) with thrust nozzles (3) and the tool head (6) at its front end with a coupling part (10) for the attachment of projecting in the axial direction rotatable tools (11) is provided.

2. Apparatus according to claim 1, characterized in that the connecting part (2) has a cavity (2a) which is gap-free with a coupling (1) for the connecting line in connection and from which the thrust nozzles (3) with an axial thrust component Propulsion of the tool (11) go out.

3. Apparatus according to claim 2, characterized in that the connecting part (2) has a pipe socket (5) on which an intermediate piece (7) with an annular chamber (7a) is rotatably mounted, in the pressurized water from the pipe socket (5) introduced is, and in that from the annular chamber (7a) from rotating nozzles (14) go, through which the intermediate piece (7) is set in rotation.

4. Apparatus according to claim 3, characterized in that the intermediate piece (7) rotationally connected to the tool head (6) is connected.

5. Apparatus according to claim 3, characterized in that the pipe socket (5) via radial bores (5 b) with the annular chamber (7 a) is connected.

6. Apparatus according to claim 3, characterized in that the intermediate piece (7) by a bearing ring (8) and a screw (9) is rotatably mounted on the pipe socket (5).

7. Apparatus according to claim 4, characterized in that the tool head (6) is provided at its front end with a coupling part (10).

8. The device according to claim 4, characterized in that the coupling part (10) has a T-shaped extension for the radial sliding a guide (11 a) on the tool (11) is provided.

9. Apparatus according to claim 4, characterized in that the Werkzeugkopt (6) and the intermediate piece (7) form a separable functional unit.

10. A method for cleaning pipes and channels by means of pressurized water and rotatable tools (11), wherein the pressurized water via a pressurized water line a connecting part (2) with a rotary bearing (5a) is supplied, and wherein on a relative to the rotary bearing (5a) rotatable tool head (6) a torque is transmitted, characterized in that impurities in the tubes and channels by means of a tool attached to the front end of the tool head (6) (11) are broken down into particles and washed away by means of the pressurized water, and that the tool (11) from the connection part (2) with an axial force component to the rear escaping pressurized water is further advanced against the impurities.

11. The method according to claim 10, characterized in that the pressurized water in the connecting part (2) in a cavity (2a) is introduced, which is gap-free with the coupling (1) for the connecting line in communication, and of the cavity (2a) in the thrust nozzles (3) is introduced, which generate an axial thrust component for propelling the tool (11).

12. The method according to claim 11, characterized in that the pressurized water from the connection part (2) introduced into a pipe socket (5) and from this an intermediate piece (7) with an annular chamber (7a) and fed from these rotary nozzles (14) , which set the intermediate piece (7) in rotation.

13. The method according to claim 12, characterized in that the pressurized water from the pipe socket (5) via radial bores (5b) is introduced into the annular chamber (7a). ,