EP3431197A2 - Device for the hydrodynamic removal of defective areas in the interior of pipelines, in particular for the restoration and cleaning of water pipes in a domestic, municipal and industrial sector - Google Patents

Abstract

The invention relates to a device for the hydrodynamic removal of impurities in the interior of pipelines, in particular for the rehabilitation and cleaning of water-bearing pipelines in domestic, municipal and industrial areas. For this purpose, the device has a pressure jet nozzle (2) which can be moved relative to the pipeline and has at least one outlet opening (24) for generating a pressure jet (25) to which at least one pressure hose (5) is connected for supplying a working fluid under pressure. In addition, the device comprises a feed device (6) for moving and positioning the pressure jet nozzle (2) in the pipeline. To improve the handling and mode of action and to expand the field of application of the device, the invention proposes that between feed device (6) and pressure jet nozzle (2) a support element (3) is arranged, which is connected via first connection means releasably connected to the feed device (6) and which is connected via the second connection means releasably connected to the pressure jet nozzle (2).

Description

The invention relates to a device for hydrodynamic removal of impurities in the interior of pipelines, in particular for rehabilitation and cleaning of water-bearing pipelines in domestic, municipal and industrial areas with a movable relative to the pipe pressure jet nozzle with at least one outlet opening for generating a pressure jet, to the supply a pressurized hose is connected to a working fluid under pressure, the device comprising a feed device with which the pressure jet nozzle can be moved and positioned in the pipeline.

In the field of water supply and drainage, the problem regularly arises that over time the flow cross-section of the pipes is narrowed or completely closed. The former is due to incrustations that form over time on the inner wall of the pipelines, which is the case, for example, with the deposition of urine stone in sewers. Even roots that grow in the area of butt joints or damaged areas in the pipeline gradually reduce the original pipe cross-section. Full closures are often the result of human error, for example, when hardening materials such as concrete, paint and the like get into a pipeline on construction sites and form a plug after they have hardened.

It is known to eliminate such impurities by means of a pressurized water jet. A device suitable for this purpose has a nozzle head which is connected at its rear end remote from the defect to a pressure hose and at its opposite front end has an outlet nozzle directed towards the impurity for the water jet. Further, over the circumference or the rear end of the nozzle head to the rear radiating nozzles are arranged, the at Pressurization according to the recoil principle to get the propulsion of the nozzle head in the pipeline. Such devices are primarily suitable for lower operating pressures.

If, however, an impurity with high pressure or maximum pressure to be eliminated, so it requires a means for controlled moving and positioning a pressure jet nozzle in the pipeline to prevent damage to the pipe due to uncontrolled hitting the pressure jet nozzle against the pipe wall. A well-proven in this regard device is from the EP 2 393 615 A1 known, in which a pressure jet nozzle is connected to the end of a tension and pressure-resistant push rod. Such push rods have sufficient inherent rigidity to push a pressure jet nozzle and oversized distances in a pipeline and record the reaction forces of the pressure jet nozzle during operation can. On the other hand, such push rods are sufficiently flexible to follow the curvatures of the pipeline or to be rolled up when not in use on a spindle. With the help of the push rod is a very precise and sensitive positioning of the pressure jet nozzle in the pipeline relative to the fault possible and thus a targeted elimination of the impurity.

Against this background, the invention has the object, even more universal form of known device in terms of their application, handling and mode of action.

This object is achieved by a generic device in which a support element is arranged between the thrust device and the pressure jet nozzle, which is releasably connected via first connection means with the feed device and which is connected via second connection means releasably connected to the pressure jet nozzle.

Advantageous embodiments will be apparent from the dependent claims.

The basic idea of the invention is, inter alia, not to connect the pressure jet nozzle directly to the feed device, but to provide a central support element in the connection region, to which the various components of the device such as feed device, pressure hose and / or pressure jet nozzle can be detachably connected. This design allows the realization of a modular concept in which the different components of the device be kept in each case in different types. By appropriate selection, the different types can then be combined to a particular device to obtain the most suitable device for a particular application. For example, the feed device can comprise a tensile and pressure-resistant push rod, which can be held in different diameters, stiffnesses, lengths, materials, etc., and / or the pressure jet nozzle is in types with fixed or rotating, fanned or bundled pressure jet, and / or in types held with different nozzle power.

The resulting great advantage is, first of all, that a device according to the invention can be adapted to the respective characteristic features of an insert with a basic configuration composed of relatively few components. In this way, costs for purchase and storage can be kept low, which increases the efficiency of the invention. For use on site, it is sufficient to carry a comparatively limited equipment with it, so that the transport can be handled with little effort. The invention allows to achieve maximum benefit in this way with minimal equipment.

In order to enable a quick and simple change of individual components at the place of use, the components are detachably connected via connecting means with the support element. Thus, for example, the support element for the connection of the feed device and / or the pressure hose and / or the pressure jet nozzle have axial bores in which the components are axially inserted and fixed there by means of locking means such as radial clamping screws or locking elements. Alternatively, the bores may also be provided with an internal thread onto which the feed device and / or the pressure hose and / or the pressure jet nozzle can be screwed with an externally applied external thread. Another alternative provides a bayonet-type connection mechanism in which the feed device and / or the pressure hose and / or the pressure jet nozzle are first inserted axially into the bore and then locked by rotation about the longitudinal axis.

In an advantageous embodiment of the invention, the support element has on its rear side facing away from the pressure steel nozzle several different connection options to feed devices with different properties to connect with the support element. For example, holes of different diameters may be provided, which are arranged at a mutual circumferential distance around the pressure hose. Depending on the purpose, feed devices of different thickness and thus different rigidity can be used in this way.

According to a preferred embodiment of the invention, the pressure jet nozzle is at least partially surrounded by a ring element, so that the pressure jet nozzle does not rest directly on the inner wall of the pipe, but via the ring member. By suitable choice of material in the ring element, such as plastic, in particular polyoxymethylene (POM), can be prevented in this way that the pressure jet nozzle damaged due to existing vibrations during operation, the inside of the pipe.

In a preferred embodiment of the invention, the contour of the inner circumference of the ring element in the axial overlap region with the pressure jet nozzle corresponds to the contour of the outer circumference of the pressure jet nozzle. In this way, the ring element surrounds the pressure jet nozzle gap-free. According to another preferred embodiment of the invention, the ring element surrounds the pressure jet nozzle like a bell, wherein an annular gap is formed between the inner periphery of the ring element and the outer periphery of the pressure jet nozzle. In both cases, the ring element has a central bore, with which it sits on the support element, so that a ring element is universally applicable even for different pressure jet nozzles.

According to one embodiment of the invention, the ring element may be permanently connected to the pressure jet nozzle, for example by gluing and the like. In contrast, however, preferred is an embodiment that allows a non-destructive release of the ring member of the pressure jet nozzle, so that it is interchangeable. Preferably, a release occurs by an axial Abziehbewegung opposite to the direction of the nozzle orifice after previously the pressure jet nozzle has been removed from the support element. In order not to obstruct such a movement, the contour of the inner circumference of the ring element in the radial direction widens continuously or at least remains constant with increasing axial length.

The fixation of the ring element on the device is preferably carried out via a positive connection, so that unnecessary additional fastening means. advantageously, the positive connection is made in the course of the assembly of the pressure jet nozzle and the support element, so that the attachment of the ring member is done in one operation with the joining of support member and pressure jet nozzle. For this purpose, both the support element and the ring element have an annular shoulder, which are concentric with each other axially concentric to the longitudinal axis and clamp the ring element during assembly of the support element and the pressure jet nozzle.

In addition, the ring element has the great advantage of being able to adjust the direction of the pressure jet relative to the axis of the pipeline to be rehabilitated. During operation of a device according to the invention the pressure jet nozzle is due to gravity with two points on the sole of the pipeline. The first contact point forms the support element with its outer circumference, the second contact point forms the ring element with its outer circumference. When using a ring element whose outer diameter corresponds to that of the support element, a device according to the invention is located within the pipeline such that the longitudinal axis of the pressure jet nozzle and the longitudinal axis of the pipeline axially parallel or optionally coaxial, the pressure jet is therefore parallel to or in the longitudinal axis of the pipeline directed.

By using a ring member with respect to the diameter of the support member of larger diameter, the longitudinal axis of the pressure jet nozzle relative to the longitudinal axis of the pipe is inclined, wherein a directed obliquely upward to the apex of the pipe pressure jet is generated. Conversely, a device with a smaller diameter of the ring element relative to the diameter of the support element leads to an inclination of the longitudinal axis of the pressure jet nozzle, which directs the pressure jet to the pipeline sole. In this way, by maintaining a few ring elements of different diameters, the inclination of the pressure jet with respect to the tube longitudinal axis can be adjusted and thus the device can be adapted to the particular requirements of the particular application.

According to a particularly advantageous embodiment of the invention wheels are provided on the support element on which the device rolls when inserted into a pipeline. Since the rolling resistance compared to the frictional resistance during sliding of the device along the tube bottom is much lower, in this way even greater distances can be handled up to impurity and / or a push rod with a smaller diameter can be selected. The former extends the application area Significant devices according to the invention; the second possibility improves the handling of the device, since push rods with a smaller diameter have, inter alia, a lower weight.

In an advantageous embodiment of the device, a device according to the invention is equipped with a hose-like sleeve which surrounds the support element. The sleeve is acted upon by a pressure medium such as water or air, whereby the outer circumference of the sleeve radially expands and presses against the inner wall of the pipe when placed in a pipeline. In this way, the device can be set relative to the pipeline, so that pressure jet-related recoil forces are already removed in the area of the device in the ground.

To increase the performance of the device may have a plurality of pressure jet nozzles or a Druckstrahldüse with multiple nozzle heads, with either fixed or rotating pressure jet.

The device can also be equipped with a light source and a camera in order to be able to record the circumstances and the progress of work on the defect. For example, the light source and / or the camera can be integrated in the support element. The supply and data lines for these components can run parallel to the pressure hose, possibly in a common enclosure.

The invention is explained in more detail below with reference to an embodiment shown in the drawing, wherein further features and advantages of the invention will become apparent. For identical or functionally identical features of different embodiments, the same reference numerals are used, as far as this serves to better understand the invention.

Fig. 1

eine Schrägansicht auf das düsenseitige Ende einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 2

einen Schnitt durch die erste Ausführungsform einer erfindungsgemäßen Vorrichtung entlang der in Fig. 3 dargestellten Linie II - II,

Fig. 3a

eine Vorderansicht auf die erste Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 3b

einen Längsschnitt durch die in Fig. 3a dargestellte Vorrichtung entlang der dortigen Linie A - A,

Fig. 4a

eine Vorderansicht auf eine zweite Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 4b

einen Schnitt durch die in Fig. 4a dargestellte Vorrichtung entlang der dortigen Linie B - B,

Fig. 5a

eine Vorderansicht auf eine dritte Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 5b

einen Schnitt durch die in Fig. 5a dargestellte Vorrichtung entlang der dortigen Linie C - C,

Fig. 6a

eine Vorderansicht auf eine vierte Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 6b

einen Schnitt durch die in Fig. 6a dargestellte Vorrichtung entlang der dortigen Linie D - D,

Fig. 7

eine Hinteransicht vergleichbar Fig. 2 auf eine fünfte Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 8

einen Längsschnitt durch eine sechste Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 9

eine Längsansicht auf eine siebte Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 10

einen Längsschnitt durch eine achte Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 11

einen Längsschnitt durch eine neunte Ausführungsform einer erfindungsgemäßen Vorrichtung, und

Fig. 12

eine Schrägansicht auf eine zehnte Ausführungsform einer erfindungsgemäßen Vorrichtung.

It shows

Fig. 1

an oblique view of the nozzle-side end of a first embodiment of a device according to the invention,

Fig. 2

a section through the first embodiment of a device according to the invention along the in Fig. 3 shown line II - II,

Fig. 3a

a front view of the first embodiment of a device according to the invention,

Fig. 3b

a longitudinal section through the in Fig. 3a illustrated device along the local line A - A,

Fig. 4a

a front view of a second embodiment of a device according to the invention,

Fig. 4b

a section through the in Fig. 4a shown device along the local line B - B,

Fig. 5a

a front view of a third embodiment of a device according to the invention,

Fig. 5b

a section through the in Fig. 5a illustrated device along the local line C - C,

Fig. 6a

a front view of a fourth embodiment of a device according to the invention,

Fig. 6b

a section through the in Fig. 6a illustrated device along the local line D - D,

Fig. 7

a back view comparable Fig. 2 to a fifth embodiment of a device according to the invention,

Fig. 8

a longitudinal section through a sixth embodiment of a device according to the invention,

Fig. 9

a longitudinal view of a seventh embodiment of a device according to the invention,

Fig. 10

a longitudinal section through an eighth embodiment of a device according to the invention,

Fig. 11

a longitudinal section through a ninth embodiment of a device according to the invention, and

Fig. 12

an oblique view of a tenth embodiment of a device according to the invention.

The FIGS. 1, 2 . 3a and 3b show a first embodiment of a device 1 according to the invention, which essentially comprises a pressure jet nozzle 2, a support element 3, a ring element 4, a pressure hose 5 and a feed device 6, which are arranged along an axis 7.

Especially from Fig. 3 shows the support member 3 is a monolithic, worked from the solid part, with a convex, to the axis 7 substantially rotationally symmetrical shape. Preferably, the support element 3 is made of metal or plastic or a combination of both. The pressure hose 5 facing the rear side 8 of the support member 3 has in the region around the axis 7 a flattening 9 and on the opposite front 10 a coaxial with the axis 7 extending projection 11. The approach 11 is stepped with a first cylindrical portion 12 larger Diameter, which is limited in the direction of the rear side 8 by a circumferential annular shoulder 13.

The free end of the lug 11 consists of a second cylindrical portion 14 of smaller diameter, which is provided with an external thread. The transition between the first section 12 and the second section 14 forms an orthogonal to the axis 7 annular surface 15th

Coaxial with the axis 7 extends from the rear side 8 to the end of the section 11 reaching through hole 16, which has a greater outgoing from the rear 8 first part length and the diameter passes over a subsequent adjoining second partial length in a smaller diameter and finally exits the end face of the extension 11.

The through hole 16 is used with its first part of the length of the recording of the pressure hose 5, to which the through hole 16 on the input side, an internal thread may have, in which the pressure hose 5 can be screwed with a corresponding fitting at its end.

Parallel to the axis 7, a blind hole 17 is introduced into the support element 3 in the clear radial distance from the through hole 16. Analogous to the through hole 16, the blind hole 17 is formed as a stepped bore with a larger diameter in the region of the rear side 8 and a smaller diameter in the region of the borehole bottom.

The blind hole 17 forms a tensile and compressive force transmitting receptacle for a feed device 6 associated push rod, on the end of a connecting sleeve 18 is frictionally mounted. The connection sleeve 18 can be inserted in a form-fitting manner into the blind bore 17, wherein the part of the connection sleeve 18 extending into the bore section with a smaller diameter has a transverse bore into which a grub screw 19 for fixing the push rod can be screwed in and out radially to the axis 7. By this type of attachment, it is possible to transmit both tensile and compressive forces from the push rod and to release the push rod if necessary from the support member 3.

The front side 10 of the support element 3 with projection 11 serves to connect the pressure jet nozzle 2 whose rotationally symmetrical outer contour in the direction of flow essentially has a cylindrical section 20 with a first diameter, to which a transition region 21 adjoins, in which a widening to a second, maximum diameter takes place. Finally, the maximum diameter section 22 is followed by a section 23 of steadily decreasing diameter. At the end, the pressure jet nozzle 2 has an outlet opening 24. The emerging from the opening 24 beam 25 includes with the axis 7 an angle α ( Fig. 1 ).

In the connection region to the support element 3, the pressure jet nozzle 2 has a coaxial inlet channel 26 which is provided on the input side with an internal thread and can be screwed onto the second section 14 of the projection 11 until the end of the pressure jet nozzle 2 rests against the annular surface 15 of the support element 3. Compared to the first section 12 of the projection 11, the pressure jet nozzle 2 has at its local end a larger diameter, so that the pressure jet nozzle 2 with the first portion 12 and the annular shoulder 13 forms a circumferential annular groove 27.

The likewise rotationally symmetrical ring element 4 is shaped like a sleeve with a rear end 28 facing the support element 3 and an opposite front end 29. The rear end 28 is formed by a circumferential annular shoulder 30 which encloses an opening 33 arranged coaxially with the axis 7 , Through the opening 33, the first portion 12 of the projection 11, wherein the annular shoulder 30 is positively received by the annular groove 27 extends.

The ring element 4 extends in the axial direction over the sections 20, 21, 22 of the pressure jet nozzle 2, the inner contour of the ring element 4 following the outer contour of the pressure jet nozzle 2 in a form-fitting manner. Thus, it is possible to push the ring member 3 axially on the pressure jet nozzle 2 until the annular shoulder 30 abuts against the end face of the cylindrical portion 20 of the pressure jet nozzle 2. After screwing the pressure jet nozzle 2 on the second portion 14 of the projection 11, the ring member 4 is fixed by positive engagement in the radial and axial direction relative to the pressure jet nozzle 2.

Starting from the rear end 28, the outer contour of the ring member 4 widens continuously in the direction of the front end, that is, the outer diameter of the ring member 4 is constantly increasing. Especially from Fig. 3b As can be seen, the maximum outer diameter of the ring element 4 is smaller than the maximum outer diameter of the support element 3. In operation of such a device 1 therefore results in a relative position of the device 1 within a pipeline, wherein the axis 7 is inclined relative to the longitudinal axis of the pipe. The emerging from the opening 24 beam 25 is thus inclined in the direction indicated by 31 pipeline sole.

The embodiments of the invention according to the Fig. 4a, 4b . 5a, 5b and 6a, 6b largely correspond to the above, so that in order to avoid repetition in the scope of constructive agreement using the same reference numerals reference is made to what is said there.

A difference between the device 1 and device 1 'according to the Fig. 4a and 4b consists in the formation of the ring member 4 ', which has a comparatively larger radial thickness and consequently a larger outer diameter. The larger radial thickness can be achieved by a thicker wall or - as in the embodiment shown - by the arrangement of a plurality of axially parallel ribs 32, the are uniformly distributed over the outer circumference of the ring member 4 'at a uniform lateral distance. Between the ribs 32 arise in this way from the rear end 28 to the front end 29 extending channels 34th

Since the outer diameter of the ring element 4 'is the same size as the outer diameter of the support element 3, during operation of the device 1', a relative position of the device 1 'within the pipeline, in which the axis 7 runs parallel to the pipe bottom 31, the beam 25th So is directed in the tube longitudinal direction.

In the in the Fig. 5a and 5b The device 1 shown "has a ring element 4" whose outer diameter is greater than the outer diameter of the support element 3. This is achieved for example by a relation to the ring element 4 greater wall thickness, optionally in conjunction with the arrangement of ribs 32. Is such a device. 1 "in a pipeline, the result is a situation in which the axis 7 is inclined relative to the pipe longitudinal axis, wherein the beam 25 is inclined in the direction of the pipe apex.

By using different ring elements 4, 4 ', 4 ", the direction of the beam 25 can be predetermined and thus an efficient processing of the defect can be achieved.

The Fig. 6a and 6b show an embodiment of the invention with a slender pressure jet nozzle 2 'and a bell-like design of the ring element 4 "'. As already mentioned in connection with FIGS Fig. 1 to 3b described has the pressure jet nozzle 2 'in the connection region to the support member 3, a cylindrical portion 20', with which the pressure jet nozzle 2 'on the second portion 14 of the lug 11 is screwed and thereby due to the relation to the first portion 12 larger outer diameter together with the annular shoulder 13 a Ring groove 27 for positive reception of the ring member 3 forms. Alternatively, the portion 20 'may also have a different cross-section, for example, be designed as a hexagon, and be inserted between the portion 20' and the annular surface 15, an annular disc, the positive engagement to the annular shoulder 30 of the ring member 4 'done ".

The extending in the direction of the outlet opening portion 23 'of the pressure jet nozzle 2' is also cylindrical with respect to the portion 20 'lesser or - not shown - the same outer diameter.

The ring member 4 '"engages as already described with its annular shoulder 30 in the annular groove 27 and is held in this way rigidly to the device 1'". In contrast to the previously described embodiments, however, the ring element 4 '' does not enclose the pressure jet nozzle 2 'with its inner contour in an interlocking manner Instead, the inner contour of the ring element 4' 'widens bell-like in the direction of the outlet opening 24, whereby between ring element 4' 'and pressure jet nozzle 2 'a radial distance is formed, which leads to a pressure jet nozzle 2' circumferential annular gap 35.

Fig. 7 Finally shows an embodiment of the invention in which three blind holes 17, 17 ', 17 "are arranged on the rear side 8 of the support element 3. The blind holes 17' and 17" largely correspond to the already described blind hole 17 and differ only in the diameter of the hole. The diameter of the blind hole 17 'is smaller than that of the blind hole 17, and the diameter of the blind hole 17 "again smaller than that of the blind hole 17' This makes it possible to connect to one and the same support member 3 different feed devices 6 with different properties.

Fig. 8 relates to a sixth embodiment of a device according to the invention 1 "" with a further development of the support member 3 'in the central longitudinal section. Front side 10, rear side 8, ring element 4 and pressure jet nozzle 2 of the device 1 "" correspond to the embodiments according to FIG Fig. 1 to 7 , so that in turn applies what is said there.

How out Fig. 8 shows the middle longitudinal portion of the support element 3 'a plurality of distributed over the circumference, axially parallel slot-shaped recesses 36 which extend with their depth from the outer periphery in the support member 3' in. Each recess 36 serves to receive a wheel 37, which is mounted in an axis 36 crossing the recess 38. Preferably, the recesses 36, for example, three to six pieces, arranged at the same circumferential distance and the axes 38 each tangential to the axis 7. This results in over the circumference of the support member 3 'annular arrangement of the wheels 37 with radial support direction relative to the axis 7. On the wheel rim 40 formed by the wheels 37, the device 1 "" rolls off within the pipeline 39 when an axial feed force is applied to the device 1 "" with the aid of the push rod 6.

A development of a device according to the invention 1 ""', which is located mainly in the removal of impurities in the interior of a pipeline 39, is in Fig. 9 shown. For this purpose, the support element 3 "has a pronounced longitudinal extension direction, that is to say the axial length of the support element 3" is many times greater than the dimensions transverse thereto.

With respect to the front 10, rear 8, ring member 4 and pressure jet nozzle 2 of the device 1 "" is on the under Fig. 1 to 7 Referenced remarks, as far as there is agreement. Only the middle longitudinal section is again developed, in addition to the first rim 40 accordingly Fig. 8 an analogously formed second wheel rim 41 is arranged at an axial distance thereto. In this way, the two wheel rims 40, 41 form a chassis for the supporting element 3 ", so that the device 1 '""can be driven to the place of use with the aid of the pushing device 6. Owing to the low rolling resistance, large distances can be achieved in this way Overcome pipe 39.

In addition - as in Fig. 9 The support element 3 "may be equipped with a hose-like, hermetically sealable collar 42, which surrounds the support element 3" coaxially with the axis 7 between the first wheel rim 40 and the second wheel rim 41 and is fastened with its inner circumference to the support element 3 " 42 can be acted upon by a pressurized medium such as air or water, whereby its outer circumference can be radially expanded and applies to the inner wall of the pipe 39. In this way, a frictional connection for fixing the device 1 '"" in the pipe 39 is generated , are discharged via the recoil forces during operation of the device 1 ""'in the pipeline 39 and further into the ground.

Subject of Fig. 10 is an embodiment of a device according to the invention 1 """with a Druckstrahldüse 2" with two or possibly even more nozzle heads 43. The Druckstrahldüse 2 "includes a Y-shaped manifold 44 with a cylindrical, extending in the axis 7 body 45, which is in Direction of the free end of the nozzle symmetrical to the axis 7 in two or possibly more diverging nozzle arms 46 divides, each carrying a rigid or rotating nozzle head 43 at their ends.

The main body 45 and the nozzle arms 46 are provided with longitudinal bores 48, 49, via which the nozzle heads 43 are supplied with working fluid. The support member 3 associated portion of the pressure jet nozzle 2 "corresponds in design terms to the cylindrical portion 20 of the in the Fig. 1 to 9 described embodiments. The connection of the pressure jet nozzle 2 "to the support element 3 with fixation of the ring element 4 therefore takes place in the manner described there.

A variation of the under Fig. 10 described embodiment is the subject of Fig. 11 , In contrast to the above-described embodiment, the working fluid is not introduced centrally in the region of the longitudinal axis 7 in the through hole 16 of the support member 3, but via two separate pressure hoses 5 ', 5 ", the side of the longitudinal axis 7 in the rear side 8 to the support member. 3 are connected and open at an acute angle through channels 47 in the through hole 16. The front end of the through hole 16 is closed by means of a cover 50. In other respects apply due to existing agreement under Fig. 10 made statements accordingly.

In many cases, the feed device for positioning the device 1 will essentially consist of a push rod 6, which is manually or mechanically inserted into the pipeline from outside the pipeline to be rehabilitated. It is also possible that the feed device additionally comprises one or more recoil nozzles on the pressure jet nozzle, which support the forward movement. At the in Fig. 12 illustrated embodiment, the feed device, however, comprises a carriage 51 and a push rod 6 '. The carriage 51 is driven by a motor and equipped with a light source and camera. In addition to the pressure hose 5 for supplying the working fluid supply and control lines 53 are connected to the carriage 51, so that the carriage 51 can be remotely controlled by the operator.

The push rod 6 'is attached via a hinge 52 at the front of the trolley 51. The free end of the push rod 6 'carries as under the Fig. 1 to 11 described with the interposition of a support member 3, a pressure jet nozzle 2, which in turn can be acted upon by a pressure hose 5 with working fluid. For positioning the pressure jet nozzle 2, the joint 52 can rotate about the longitudinal axis and / or be pivoted about an axis transverse to the longitudinal axis.

It is understood that the invention is not limited to the feature combinations of the respective embodiments according to the Fig. 1 to 12 is limited. Rather, within the scope of the invention, combinations of features of different embodiments disclosed in the individual embodiments. Thus, the individual support elements and / or ring elements and / or pressure jet nozzles of the different embodiments are interchangeable without departing from the scope of the invention. Likewise, the in Fig. 9 shown device without cuff are used, whereby the functionality of the device is maintained as a carriage.

Claims (15)

Device for the hydrodynamic removal of impurities in the interior of pipelines, in particular for the rehabilitation and purification of water-bearing pipelines in the domestic, municipal and industrial sectors, - With a relative to the pipeline movable pressure jet nozzle (2) with at least one outlet opening (24) for generating a pressure jet (25), - Wherein for supplying a pressurized working fluid to the pressure jet nozzle (2) at least one pressure hose (5) is connected, and - With a feed device (6) for moving and positioning the Druckstrahldüse (2) in the pipeline, characterized in that between the feed device (6) and pressure jet nozzle (2) a support element (3) is arranged, which releasably via first connection means with the feed device (6) is connected and the second connection means releasably connected to the pressure jet nozzle (2). Apparatus according to claim 1, characterized in that the first connection means of one or more recesses, in particular bores (17, 17 ', 17 "), are formed in the feed device (6) can be inserted. Apparatus according to claim 2, characterized in that the first connection means of a plurality of recesses, in particular bores (17, 17 ', 17 "), are formed and the plurality of recesses are of different sizes. Device according to one of claims 1 to 3, characterized in that the first connection means comprise securing elements (19) with which the end of the feed device (6) on the support element (3) can be fixed. Device according to one of claims 1 to 4, characterized in that the second connection means comprise a threaded portion on which the pressure jet nozzle (2) with a corresponding threaded portion can be screwed. Device according to one of claims 1 to 5, characterized in that the support element (3) has a through hole (16) at one end of the at least one pressure hose (5) can be connected, and with their other end in the pressure jet nozzle (2) opens. Device according to one of claims 1 to 6, characterized in that the pressure jet nozzle (2) is surrounded by a ring element (4). Apparatus according to claim 7, characterized in that the ring element (4) by positive engagement between the support element (3) and pressure jet nozzle (2) is held. Apparatus according to claim 7 or 8, characterized in that the outer diameter of the ring element (4) is smaller than the outer diameter of the support element (3) or that the outer diameter of the ring element (4 ") is greater than the outer diameter of the support element (3) or that the outer diameter of the ring element (4 ') is equal to the outer diameter of the support element (3). Device according to one of claims 1 to 9, characterized in that on the support element (3 ', 3 ") at least two, preferably three to six wheels (38) are arranged, which form the formation of rolling surfaces with a part of its circumference over the outer periphery the support element (3 ', 3 ") survive. Device according to one of claims 1 to 10, characterized in that the support element (3 ") by a tubular sleeve (42) is surrounded, which is acted upon for radial expansion of the sleeve (42) with a pressure medium. Device according to one of claims 1 to 11, characterized in that the feed device comprises a tensile and pressure-resistant push rod (6), which extends to the manual or mechanical handling of the device to outside the pipeline. Device according to one of claims 1 to 11, characterized in that the feed device comprises a movable inside the pipeline movable carriage (51) and the pressure jet nozzle (2) via a push rod (6 ') and a support member (3) with the carriage (51 ) connected is. Device according to one of claims 1 to 13, characterized in that the pressure jet nozzle (2 ') comprises a plurality of nozzle heads (43). Device according to one of claims 1 to 14, characterized by two pressure hoses (5, 5 ') which are connected to the support element (3) and connected to the pressure jet nozzle (2).

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