Note: Descriptions are shown in the official language in which they were submitted.
I
The present invention relates to a pipe cleaning
device which, operated by a pressure medium, automatically moves
by recoil in a pipe to be cleaned and has a rotor provided
with recoil nozzles fox Canaan, said recoil nozzles driving
the rotor. The rotor is floutingly supported on a stators
with a hollow axle and between two flanges.
A pipe cleaning device of this construction is disk
closed in German Offenlegungsschrift 3,151,581. In various
fields of application these pipe cleaning devices have given
very satisfactory results. Difficulties were encountered only
in pipes with rigidly adhering soiling. It has been found
that the speed of rotation of the rotor is so high that the
jets emerging from the nozzles are so intensely turbulent that
they are virtually incapable of producing a cleansing action.
When the cleansing action is unsatisfactory the
water pressure is usually increased. However, the cleansing
action thus changes only slightly since the increased pressure
causes an increased speed of rotation and thus an intensified
turbulence. The increased pressure causes a greater rate of
flow and this does not result in an intensified cleansing
action.
It is also known to provide the rotor with abrasive
means, such as chains or wire brushes in order to increase
the cleansing effect. However, this can logically be achieved
only in pipes having large diameters and the abrasion is
undesirable in many respects.
Therefore, the present invention improves a pipe
cleaning device which, operated by a pressure medium, moves
automatically by recoil in pipe to be cleaned and has a rotor
provided with equal nozzles or cleaning said rotor being
driven sand recoil nozzle and ennui ~loatingl~ supported on
a stators and a hollow axle and between two flanges such that
-- 1 --
the cleansing action ox the jets emerging from the rotor no- .
ales us increased.
according to the present invention therefore there
is provided a pipe cleaning device which, operated by a pressure
medium, moves automatically by recoil in a pipe to be cleaned
and has a rotor provided with recoil nozzles for cleaning,
said rotor being driven by said recoil nozzles and being float-
tingly supported on a stators and a hollow axle and between
two flanges in which at least one of the recoil nozzles in
the rotor exerts an oppositely directed torque.
Thus the present invention provides a pipe cleaning
device in which at least one of the recoil nozzles in the
rotor exerts an oppositely directed torque.
The present invention will be further illustrated
by way of the accompanying drawings, in which:
Figure 1 is a longitudinal section through a pipe
cleaning device according to one embodiment of the invention;
Figure 2 is a longitudinal section through a device
having an annular tee-slot in the rotor;
Figure 3 is a cross-section through the rotor accord-
in to Figure 2;
Figure 4 is a longitudinal section through a device
with pulsating method of operation; and
Figure 5 and 6 are diagrammatic representations
explaining the various nozzle arrangements.
In its type of construction the pipe cleaning device
according to Figure 1 corresponds to that according to German
Offenlegungsschxift 3,141,581. It co~Xises a stators 1
divided in the longitudinal direction and a pipe 2 installed
on the hollow axle of the stators 1,
The pressure medium roared for the operation
flows into the stators 1 through the inlet 3 extending in the
-- 2 --
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longitudinal direction of the device.
thread 4 serves for the direct screw connection of
the pipe cleaning device on a delivery pipe for the pressure
medium. Depending on the intended use it can be a tube or a
pipe member, which serves a a lance.
The pressure medium passes through the inlet 3 into
a distributor space 5, from which nozzles 6 directed rearwardly
relative to the feed direction of the device lead to the out-
side. The nozzles 6 are intended only for the feed and for
washing out the cleaned pipe. In the extension concentric to
the inlet 3 there hollows the pressure space 7, which is disk
posed within the hollow axle 8 and is closed by a peg 9 of the
second stators member, it the head 10, An internal thread
in the hollow axle 8 and an external thread on the peg 9 allow
installation of the stators 1, 10 in a simple manner. The head
10 of the stators 1 can be provided with one or several bore-
holes 11, which open out into nozzles 12. Said nozzles 12
are intended primarily for washing out a clogged pipe before
it can be cleaned by the action of the nozzles in the rotor.
Particularly for pipes which are driven hydraulically through
the ground and subsequently washed out devices having nozzles
12 in the head 10 must be used.
The pressure medium flows through the hollow axle
8 and emerges through, the Berlioz 13. Said Berlioz can
extend concentrically but must not necessarily do so. The
rotor 2 is disposed on the axle 8 of the stators 1 with a certain
clearance. Each ox the two members of the stators 1 form a
flange side 14 for the rotor, which thus is floutingly support-
Ed on the stators
Outwardly directed oarlock 15 are disposed in
the rotor 2. Lowe the rotor 2 is rotating said Berlioz
temporarily kinked 'with the Berlioz 13 in the stutter
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On this manner the pressure medium can flow inter
mittently through the Berlioz 13 and 15 and emerge through
the nozzles 20 opening out into the berrylike; 15. The angle
of emergence of the nozzles 20 can vary in any direction.
Depending on the direction of the nozzles there is produced
a force of reaction which acts in the direction of rotation
of the rotor 2 or in the opposite direction. In one case
the nozzle 20 acts as a driving nozzle and in the other case
as a braking nozzle. The nozzles 20 can also act in the
direction of forward thrust or against the direction of forward
thrust depending on inclination. Of course the nozzles must
not be so designed that the forces at the rotor 2 are more or
less completely compensated.
This problem can be solved in various ways. When
all the nozzles 20 have the same dimensions the number of no-
ales in one direction of rotation must be larger than that of
the nozzles in the opposite direction. This solution is no-
presented symbolically by corresponding arrows in Figure 6.
Like the nozzles 6 the nozzles 20 are designed as
screw-in sockets with external threads and have concentric
through holes 21 of various sizes. By the corresponding
selection of the nozzles 20 the speed of rotation can thus be
varied at arbitrarily applied pressure in a relatively simple
manner. This preferred solution is represented symbolically
in Figure 5.
A pipe cleaning device it shown in Figure 2 in long-
itudinal section Thus pipe cleaning device is particularly
suitable or clean pipes having Hall diameters. In this
case the statics Allis is divided into two members in the Lyon-
tudinal dixect~on and all the nozzles axe disposed in the rotor The dist~bution a the nozzles 2Q or driving the rotor can
be clearly seen in Foggier which is a section at right angles
~3~6~
to the longitudinal direction. All the Berlioz 15 and 17
extend from an annular tee-slot 16 in the rotor outwardly to
the nozzles I which have various dimensions.
In the drawing the Berlioz 15 extend exactly
tangentially to the hollow axle of the stators 1 through the
annular tee-slot 16 in a plane at right angles to the long-
tudinal axis of the stators However, this must not necessarily
be so. It Gould then he logical to so arrange the smaller-di-
mentioned nozzles which operate as braking nozzles) that they
I are inclined in the weed direction, while the larger recoil nozzles
20 are rearwardly inclined so that they assure a resulting
feed direction.
Merely for the sake of completeness yet another soul-
lion is shown in Figure 4, in which the annular tee-slot, which
provides an approximately uniform pressure supply to the no-
ales, is disposed in the stators rather than in the rotor.
This is always possible in cases in which the walls of the
hollow axle are sufficiently thick.
The nature of the present invention lies in the en-
rangement of the nozzles. It is not possible to represent all the various Variants diagrammatically. However, it is
important that the nozzles exert various torques on the rotor.
Some of these torques cancel each other but a residual torque
is always present
