EP0936319B1 - Cleaning device for pipes and sewer systems - Google Patents

Abstract

The cleaning body for pipelines, sewage pipes and the like, has a polygonal cast body (1) with a connection for water under pressure. A water distributor is at the water inlet (16) in a dome shape or on a dividing plane (3), with entry openings as partial circular segments forming a blade-shaped intermediate wall across the flow direction. Water pressure channels (8), leading out from the entry openings, are free of edges and offer a low resistance to the water, in a virtually circular cross section and the largest possible deflection radius. The water channels (8) have a fixed number of outlets (11), give a single or multiple water branch system, and narrow towards the ends (13) of the water channels directly at the outlets.

Description

The invention relates to a pressurized water-operated cleaning body for difficult to access Cavities, especially for piping and sewer systems, in addition to the usual deposits also show strong sedimentation and incrustations. Pipeline systems carrying waste water are known to be due to their high solids content Flow media with low flow rate of constant danger of Exposed to constipation.

However, cleaning devices for sewage pipes are well known and even in the most varied versions in the form of nozzles and / or movable ones Broaching bodies with simultaneous pressure water or air flow with different efficiency in use.

For example, in DD 226 028 A1 a device for the removal of sediments is named the sediments should dissolve and convey without additional pressure water supply. The mechanical removed in layers by a profile cleaning device designed as a hollow body Incrustations are whirled up using compressed air and against the direction of flow of the wastewater led into a trough-shaped space of the hollow body. A wastewater pump conducts this suspension, which contains different solids via a centrifuge to the outside. What is unsatisfactory here is that this device only for cleaning services in sewers with larger nominal diameter ranges is provided and due to the lack of clear water as an rinsing liquid, only an insufficient one Rough cleaning is achieved.

In DE 24 27 278 C2 there is also a device for cleaning sewers described, which from a longitudinally movable pressure pump in the sewer consists. This has a flexible suction nozzle on the inlet side and one on the outlet side the pressure hose connected to the pressure pump. The entire pressure pump is on mounted on a chassis, equipped with a centrifugal worm wheel and as explosion-proof Submersible thick matter pump. Another disadvantage of this device is the high outlay on equipment, the undesirable susceptibility to malfunction and the inadequate Effectiveness due to the lack of rinsing water and the insufficient pressure hose cross-section with suction.

DE 21 07 988 B2 discloses a sewer cleaning device which moves recoil in the area of the central channel level at the bottom of sand and mud by obliquely loosened backward spray nozzles. The effectiveness of the cleaning should thereby be reinforced that the extension lines of the inclined inward to the longitudinal axis Hit nozzles in or at the intersection of the channel center plane. By sideways arms of the recoil-moving nozzle body projecting from the central axis at the same time the delivery of pressurized water to remove the loosened deposits. Set both the channels carrying the pressurized water and the arrangement of the nozzles the intended efficiency of the device due to excessive flow losses Clear water.

Finally, DE 24 32 168 B2 a cleaning device for sewer pipes was known, which is powered by pressurized water independently in sewer lines moved and at the same time a cleaning with recoil nozzles directed backwards the effect of pipes. The main disadvantage is that part of the actual hydraulic fluid required for cleaning to drive a rotatable shaft, which Cutting or milling tools carries, is used and thereby the cleaning effect is significantly reduced.

With WO 85/05295 A1 a hydrodynamic cleaning nozzle has also become known, which is also intended for cleaning channels. Due to their external configuration, especially with regard to the mechanical breaking up of solid sedimentations and the arrangement of the internal pressure water channels is also this nozzle is unsatisfactory in its effectiveness. In addition to the undesired use of radiation nozzles at the channel ends, which results in the flow behavior of the pressurized water adversely affect the formation of eddies and also after the onset of wear This routing of the pressurized water channels allows difficulties when changing no expansion options in the sense of an increase in the manner described the number of pressurized water channels, for example through several division levels.

A cleaning device for pipes and pipes which is significantly improved in efficiency Channels are presented with DE 195 16 780 C1. This nozzle for propulsion and cleaning is in their round configuration is intended for hydrodynamic operation and consists of a nozzle body made of machined solid material, screwed together in two parts. The interior of this cleaning nozzle has elaborated cavities a pressurized water inlet opening, a distribution chamber, a conical water divider with adjacent channels and pressurized water outlet openings. The disadvantage of this device is that the manufacture of this cleaning nozzle designed extremely complex. In addition to the practiced division of the nozzle body and the necessary minimization of the flow resistance of the water flowing through, there is a need to additionally finish all contact surfaces on the inside. This in turn means that only those for the nozzle body Materials can be used that can also be machined as solid material.

In addition, at critical points, such as on the water divider and also at the bottom of the distribution chamber, In addition, a coating that lowers the drag coefficient is provided.

In addition, the water divider disadvantageously contains a replaceable one Wear part in the form of a separate molded part.

The aforementioned cleaning nozzle is also available in a further developed version DE 195 33 654 C2 became known. As also in a rounded configuration trained tool, this hydrodynamic nozzle is also not very suitable, mechanically supportive cleaning and clearing effects through the Break up sedimentation or other deposits or also Position tools or control systems in certain cavities.

In addition, the undivided compact body manufactured using the precision casting process is required certain minimum cross sections of the cavities and outlet openings around the grains of sand the decayed ceramic forms, such as those used in investment casting, to be able to escape outside.

Smallest outlet cross-sections, such as those used to increase the pressure jet effect of the flow medium and thus the cleaning and clearing effect are desirable cannot be achieved with sewer cleaning nozzles manufactured using this method. Therefore are also to be replaced at the outside of the duct ends of this device Blasting nozzles used, which in addition to a flow-unfavorable behavior of the If necessary, it is difficult to solve the flushing medium due to the formation of eddies.

A need for cleaning and clearance facilities of the type described above, the little are complex to manufacture and maintain, if possible without mechanical processing can be manufactured with good efficiency and also have a long service life, is still there.

The technical problem of the invention is, contrary to all previously Available facilities, the pipes, channels or other cavities from sedimentation and other contaminants should clear a cleaning body which is capable of both cleaning and high efficiency Bring about clearance effects as well as tools or control systems in them Spaces, especially in hard-to-reach areas.

At the same time, it is intended by appropriate design of the cleaning body the prerequisite for making deposits that are not using conventional means or can only be inadequately solved and cleared, much better to eliminate. In addition, the preformed with reasonable manufacturing effort without post-processing Cleaning body as a compact body have a high wear resistance and avoid the replacement of nozzle inserts that has always been required.

The technical problem is solved by a polygonal according to the invention Cast compact body for cleaning and clearing pipes and sewer systems is provided and at the same time tools and control systems if necessary can lead and position.

This polygonal cast compact body has a pressurized water connection and points in the area the entry of pressurized water in a dome-shaped cavity or in a parting plane an integrated water divider with circular segment-shaped inlet openings on. These inlet openings are perpendicular to the direction of flow knife-like partitions. At the circular segment-shaped entry openings include absolutely edge-free and low flow resistance pressurized water channels an almost circular cross section and the largest possible deflection radius, which in can point in any direction.

These pressurized water channels experience according to a defined number of outlet cross sections either a single or a multiple branch. Only immediately towards the end of the pressurized water channel, these pressurized water channels shrink without any flow resistance either in a given circular or slit-shaped Outlet cross section.

In a further embodiment are advantageously in the area of the pressurized water inlet in several superimposed division levels, each a water divider with circular segment segments and circular segment-shaped inlet openings. One too accordingly increased number of pressurized water channels with the largest possible hydraulic diameter are formed, follows.

The edge-free and low flow resistance pressurized water channels form afterwards the water divider with the circular segment-shaped inlet openings a flowing Transition from the inlet cross section of the circular segment-shaped inlet openings into one Circular cross section. They are as large as possible from the central axis of the pressurized water inlet Deflection radius within the total volume of the polygonal cast compact in each given direction to the pressurized water inlet in each one above the other Pitch level guided symmetrically in pairs and without crossing.

To increase the impact of the rinsing water, the pressurized water channel ends are designed according to the invention in outflow surfaces with cross sections of 0.2 mm ² to 3 mm ² . Cross sections of 1 mm ^{2 have} proven to be favorable.

It has proven to be particularly advantageous if the polygonal cast compact body as Original, undivided compact body with a cast or original thread is designed for the pressurized water connection. A rust carrier and highly wear-resistant cast material, which is practically mechanically hardly machinable. Sintered metallic or non-metallic materials have also proven themselves.

A high level of stability is also guaranteed if the polygonal cast compact body as a shaped compact body has a shape that transitions into a rounded shape and contains reinforcing or stabilizing elements.

In the following, the invention is to be illustrated using an exemplary embodiment with associated drawings are explained in more detail.

Fig. 1:

Vorderansicht des polygonalen Gußkompaktkörpers

Fig. 2:

Schnitt A-A des polygonalen Gußkompaktkörpers

Fig. 3:

Unteransicht des polygonalen Gußkompaktkörpers

Fig. 4:

Draufsicht des polygonalen Gußkompaktkörpers

Fig. 5:

Schnitt B-B des polygonalen Gußkompaktkörpers

Fig. 6:

räumliche Darstellung der im polygonalen Gußkompaktkörper integriert ausgebildeten Druckwasserkanäle in Draufsicht

Fig. 7:

räumliche Darstellung der im polygonalen Gußkompaktkörper integriert ausgebildeten Druckwasserkanäle in Vorderansicht

Fig. 8 a:

Vorderansicht eines Druckwasserkanals mit den Schnittstellen A-A, B-B, C-C und D-D

Fig. 8 b:

Querschnittsformen an den Schnittstellen A-A, B-B, C-C und D-D aus Fig. 8 a

Fig. 9:

Ausbildung der Austrittsquerschnitte

Fig. 10:

Unteransicht des Wasserteilers in zwei Etagen

Fig. 11:

Seitenansicht des im polygonalen Gußkompaktkörper integriert ausgebildeten Wasserteilers in zwei Etagen

Fig. 12:

Vorderansicht der paarweise symmetrisch und kreuzungsfreien Druckwasserkanalführung

Fig. 13:

Draufsicht auf die paarweise symmetrisch und kreuzungsfreie Druckwasserkanalführung

Fig. 14:

räumliche Darstellung des polygonalen Gußkompaktkörpers

Show it:

Fig. 1:

Front view of the polygonal cast compact

Fig. 2:

Section AA of the polygonal cast compact body

Fig. 3:

Bottom view of the polygonal cast compact

Fig. 4:

Top view of the polygonal cast compact

Fig. 5:

Section BB of the polygonal cast compact

Fig. 6:

spatial representation of the pressurized water channels integrated in the polygonal cast compact body in plan view

Fig. 7:

spatial view of the pressurized water channels integrated in the polygonal compact body in front view

Fig. 8 a:

Front view of a pressurized water channel with the interfaces AA, BB, CC and DD

Fig. 8 b:

Cross-sectional shapes at the interfaces AA, BB, CC and DD from Fig. 8 a

Fig. 9:

Training of the outlet cross sections

Fig. 10:

Bottom view of the water divider in two floors

Fig. 11:

Side view of the water divider integrated in the polygonal cast compact body on two floors

Fig. 12:

Front view of the paired symmetrical and intersection-free pressure water channel guide

Fig. 13:

Top view of the paired symmetrical and intersection-free pressurized water channel

Fig. 14:

spatial representation of the polygonal cast compact

In Fig. 1 is a front view of an undivided polygonal cast compact body 1 made of rust-proof highly wear-resistant casting alloy G-X300CrMoB, which mechanically not or hardly postprocessable is shown. This undivided polygonal cast compact body 1 for hydraulic operation has on its underside a pressurized water connection 2 for along the Center axis 18 guided and entering in the flow direction 6 pressurized water and contains a total of eight outlet cross sections 11. The undivided polygonal cast compact body 1, which is based on the classic lost wax process using ceramic Molds were made extremely difficult and with high failure rates in a special, precise casting process using zircon sand cold hardening and hot box as well as graphite core with simultaneous use of special Binders made.

Fig. 2 shows in longitudinal section AA the polygonal cast compact body 1 with the pressurized water inlet 16, which is bordered by a pre-cast thread 19. The outlet cross sections 11 at the pressurized water channel ends 13 of the pressurized water channels 8 each have an area size of 0.9 mm ² . The pressurized water channels 8 connect in a division level 3 above the pressurized water inlet 16 without flow resistance.

3 and 4 each show the bottom view and the top view of the polygonal cast compact 1 recognize. 3, the outlet cross sections are 11 of the pressurized water channels 8 recognizable. Shown from this direction is through the pressurized water connection 2 viewed at the pressurized water inlet 16, a water divider 4 with a segment of a circle Entry openings 5 arranged. The circular segment-shaped entry openings 5 of the water divider 4 are arranged transversely to the flow direction 6 knife-like partitions 7 formed. From Fig. 3 it can also be seen that the circular segment-shaped inlet openings 5 connect the pressurized water channels 8 without edges.

5 shows section B-B of the polygonal cast compact body 1 in plan view of the parting plane 3, in which the water divider 4 with the transverse to the flow direction 6 standing knife-like partitions 7 formed circular segment-shaped Entry openings 5 is located. At the same time, the eight cross sections of the pressurized water channels 8 recognizable.

6 shows a top view of the branches 12 of the pressurized water channels 8 in the spatial representation of the pressurized water channels 8, which then pass over the pressurized water channel ends 13 into the outlet cross sections 11 of 0.9 mm ² outflow area in each case.

7 shows the spatial representation of the pressurized water channels 8 and the pressurized water inlet 16 with the pre-cast thread 19 shown in front view, to be seen is that the pressurized water channels 8 from the water divider 4 with the largest possible turning radius 10 are led to the pressurized water inlet 16.

In the front view of a pressurized water channel 8, the four cuts, A-A, B-B, C-C and D-D set at different cross-sectional locations, which are in Fig. 8 b at A-A,

B-B, C-C and D-D at all of these interfaces almost circular cross sections 9 different Show diameter.

The outlet cross sections 11 at the pressurized water channel ends 13 of the pressurized water channels 8 6 are alternately in FIG. 9 as a circular outlet cross section 14 and a slot-shaped outlet cross section 15 without any nozzle inserts. According to the intended field of application, the choice of arrangement is advantageous however also possible in a different assignment.

In Fig. 10 the bottom view of a water divider 4 is shown in two floors. Fig. 11 shows the side view of this water divider 4 with the parting planes 3 and the circular cross section 17 of the pressurized water channels 8 in two floors.

12 shows a particularly advantageous embodiment of a cleaning body with very high efficiency shown in front view. The pressurized water channels are 8 in the polygonal cast compact body 1 with the largest possible deflection radius 10 in each superimposed division level 3 in pairs symmetrically and without crossing arranged so that they over the total volume of the cleaning body extend the entire cross-section and thus an extremely low flow resistance Enable water flow with an effective cleaning, rinsing and clearing effect. In Fig. 13 is the paired symmetrical and crossing-free routing of the pressurized water channels 8 shown in plan view.

A spatial representation of the polygonal cast compact body 1 is shown in FIG. 14 in multiple views.

This polygonal cast compact body 1 was formed as a compact body without nozzle inserts also from sintered metal and in a further embodiment from a non-metallic Material, made of ceramic, manufactured and in practical use with good results tested. To increase the stability were reinforcing and stabilizing Elements with beneficial effects have been used.

The advantages of the cleaning body according to the invention made of a material with extreme Wear resistance exists particularly in the postprocessing-free production method through a special casting process, which allows this cleaning body without replaceable wear parts, such as water divider segments or nozzle inserts, Economical to manufacture and as a single-use product after the signs of wear without separating out expensive repair work.

List of the reference symbols used

1

polygonal compact body

2

Pressure water connection

3

parting plane

4

water divider

5

Entry segment in the shape of a segment of a circle

6

flow direction

7

knife-like partitions

8th

Pressure water channels

9

almost circular cross section

10

greatest possible turning radius

11

Exit cross-sections

12

branch

13

Pressurized water channel end

14

circular outlet cross-section

15

slit-shaped outlet cross-section

16

Pressurized water inlet

17

Circular cross-section

18

central axis

19

thread

Claims (6)

1. Cleaning device for pipes and sewer systems having pressurized water operated water ducts in its interior from the pressurized water supply centre line in the area of the diameter half laterally, or deflected in propelling direction, and having cleaning and propelling nozzles at the duct end, characterized in that a cleaning and clearing polygonal compact casting (1) guiding tools or control systems as the case may be, with a pressurized water connection (2) in the area of the pressurized water inlet (16) in a dome-shaped hollow space or in a joint face (3), has an integral water divider (4) with segment of circle shaped inlet ports(5) which are formed through blade-like partitions (7) transverse to the direction of flow (6) adjacent to pressurized water ducts (8) without edges and of low flow resistance and with a practically circular cross-section (9) and a deflection radius (10) as large as possible in any direction, which have a simple or multiple branching (12) as a function of a specified number of outlet cross-sections (11), whereby the pressurized water ducts (8) reduce to a specified circular outlet cross-section (14) or a specified slot-shaped outlet cross-section (15) just before the end of the pressurized water duct (13) only.
2. Cleaning device for pipes and sewer systems according to claim 1, characterized in that an integral water divider (4) with segment of circle shaped and annulus segment shaped inlet ports (5) is arranged in the polygonal compact casting (1) in the area of the pressurized water inlet (16) in several joint faces (3) one on top of the other, and in that an increased number of pressurized water ducts (8) with as large as possible a hydraulic diameter is formed, and extends beyond the diameter half of the polygonal compact casting (1) across the full diameter.
3. Cleaning device for pipes and sewer systems according to claim 2,
   characterized in that the pressurized water ducts (8) without edges and of low flow resistance adjacent to the water divider (4) with segment of circle shaped inlet ports (5) have a fluid transition from the inlet cross-section of the segment of circle shaped inlet ports (5) to a circular cross-section (17), and in that said ducts are arranged in pairs and symmetrically and without crossing from the centre line (18) of the pressurized water inlet (16) with as large as possible a deflection radius (10) within the overall volume of the polygonal compact casting (1) in a specified direction towards the pressurized water inlet (16) in each of the joint faces (3) one on top of the other.
4. Cleaning device for pipes and sewer systems according to any of claims 1 through 3, characterized in that the specified outlet cross-sections (11) at the ends of the pressurized water ducts (13) have an outflow area of 0.2 mm² to 3 mm², preferably of 1 mm².
5. Cleaning device for pipes and sewer systems according to claim 1, characterized in that the polygonal compact casting (1) is undivided as a primary shaped compact casting, has a finished cast or primary shaped thread (19) for the pressurized water connection (2), and is made of a rust-inhibitive, highly wear-resistant material for casting, or of a sintered metal or a non-metallic material.
6. Cleaning device for pipes and sewer systems according to claim 5, characterized in that the polygonal compact casting (1) as a primary shaped compact casting has an external shape transiting into a rounded construction, and reinforcing and/or stabilising elements.

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