DE19826238C1 - Hydraulic swirl jet for cleaning pipelines - Google Patents

Abstract

The hydraulic swirl jet casing is formed by a base casing (6) with a threaded (10a) hollow spigot (10) to receive an internally threaded (9a) end casing (9). The jet casing is attached to a support (2) by fitting over a pin (3) on the support to be retained by a nut (8) which prevents axial movement while allowing rotation.

Description

The invention relates to a hydraulic Vortex jet nozzle with one on a high pressure line connectable, a central bore and a pin having stand and with a stand concentrically encompassing and axially detachable on it Coupling means fixed rotor sleeve with jet nozzles.

A known hydraulic vortex jet this Type according to DE 34 12 319 C1 has a rotor sleeve, which by means of a arranged on the pin of the stand, in Cross-section V-shaped groove and by means of a Cross bore penetrating the rotor sleeve as well as in the V-shaped groove engaging pin is fixed axially. In this way, it can be freely rotated in the blasting mode The rotor sleeve is secured against axial displacement. Sudden impulses from the rotor sleeve when starting and Turn off the print medium occur as well Running these impulses as well Sliding friction forces on the groove in the stud of the stand and transferred to the pin engaging in it. Here for example, the pressure is 750 bar and the speed the rotor sleeve approx. 900 rpm.  As it turned out in the meantime, through these forces depending on the temporal Loads of the pin will be rubbed off with the result that Cross-section undergoes a concave notch that eventually leads to the breakage of the pen. So that's it Service life of this hydraulic swirl jet nozzle on the Service life of the pin against axial displacement limited. Because the pin of the rotor sleeve is always tangential on a spatially very limited peripheral area on the Groove is present when turning on and off the Print medium uneven momentum forces on the Runner sleeve with the result that shear forces on it be transmitted.

And finally, further shear forces occur from the outlet openings at the bottom of the Pressure medium jets emerging from the rotor sleeve and those of reaction forces triggered by them on the pen.

In addition to this generic hydraulic Other nozzles are known for vortex jet nozzles:

DE 43 28 744 C1 is a non-generic one Hydraulic nozzle known only with one Speed of 50 rpm and with a pressure between 15 bar and 20 bar works. This nozzle has a lower one, housing part designed as a union nut Internal thread, which with the external thread of a upper housing part is screwed. The hydraulic Liquid enters the housing from below, flows through a distributor disc with three symmetrically arranged holes and hits after their passage on a turbine wheel, which is rotatable in the housing is stored and a spray head outside the housing drives. The hydraulic fluid is through Cross holes and through a longitudinal hole in the Turbine shaft conveyed to the spray head. The spray head is rotationally fixed via a pipe section with the turbine shaft connected. How this connection is made will not disclosed. In addition, the two-part spray head with against its cylindrical outer part by a cap nut one shoulder of the pipe section pressed, which, however, too a safeguard against longitudinal displacement is not sufficient, because with the appropriate Direction of rotation from the adjacent shoulder of the spray head through the impulse forces when starting and the Mass inertial forces screwed on and off so that it can be unscrewed.

Furthermore, in US Pat. No. 4,019,686 Non-generic sprinkler described, the housing parts are also screwed together. A Screwing of rotating parts of a rotor sleeve is not revealed.

From this closest prior art starting, the invention has for its object a hydraulic vortex jet of the aforementioned To create genus, which is characterized by a the cones of the Stand and the rotor sleeve gentle, rotative axial load and a unusually long service life with high Distinctive eddy beam power.  

This task is in conjunction with the beginning solved generic term according to the invention solved by that the rotor sleeve from a base sleeve with a protruding tubular sleeve with external thread and from one concentrically screwable end sleeve with Internal thread exists, which to the free end area of the pin provided there with an external thread reaching sleeve of the base sleeve from a nut as releasable coupling agent on the pin against axial Shifts, however, is freely rotatable. By for the first time, this training will be a runner sleeve a hydraulic vortex jet at the beginning mentioned type in the axial direction "rotative" and thus no longer tangential on one side against axial displacements fixed because now the front of the Pipe sleeve with the end face facing it fixed nut on the tenon in even, rotating contact and thus a radial and axially completely uniform application of Stand and the rotor sleeve is done because of the contacting surface for axial fixing concentric to the spigot as well as to the common Longitudinal symmetry axis of rotor sleeve and stand run.

When training the nut for axial fixing the base sleeve and thus the entire rotor sleeve on the Pin of the stand allows the invention different versions:  

According to a first advantageous embodiment the mother with a washer against a paragraph of the Spigot clamped. The mother can with the The disc can be made in one or more parts. With in other words, the first alternative is Washer part of the mother, and at the second Alternatively, there are two separate parts.

According to a third embodiment, the mother with a lock nut against a shoulder of the pin or against each other without a paragraph against axial Displacements on the external thread of the pin tense. This is the usual principle of determination a mother with a lock nut. For additional mechanical rotation lock allows the invention in advantageous development of the invention also Arrangement of a spring washer between the nut and Lock nut.

And finally, after another Embodiment the nut and / or the washer and / or the counter nut against axial displacement on the Pin additionally secured with a metal adhesive be made of an anaerobic curing One-component adhesive based on methacrylates or cyanoacrylates.

This metal adhesive can of course also be used Securing the end sleeve with its internal thread on the  Male thread of the tube sleeve of the base sleeve used become.

In an advantageous development of the invention the external thread of the Pin and the external thread of the tube sleeve depending on the The direction of rotation of the rotor sleeve is the same:

So according to a first embodiment clockwise rotating rotor both the external thread of the Pipe sleeve as well as the external thread of the pin designed right-handed.

The reverse is the case with the left-handed runner External thread of the tube sleeve and the external thread of the Left-handed cone. Through these designs, each according to the direction of rotation of the rotor sleeve from the outer Forces in blasting operation each interlocking threads in their fixation - and not roughly in their starting position - rotated. The mother and Countermothers are acted upon by them Frictional forces and in particular by the End face of the tubular sleeve of the base sleeve Forces are "screwed" into their fixed position. This will an unintentional loosening of the end sleeve from the Base sleeve avoided as well as loosening the nut and Lock nut from the external thread of the pin.  

To additionally secure a loosening of the axial Specifying runner sleeve to stand is special advantageous development of the invention, the distance between the end face of the with the external thread provided end portion of the pin and the inner Bottom surface of the end sleeve less than the height of the nut or smaller in the embodiment with lock nut dimensioned as the height of the lock nut. Because of this smaller distance between the face and the neither the mother nor the Counter nut with whatever powers "unscrewed" as they are on another Unscrewing from the bottom surface of the end sleeve prevented become. At most, the internal thread of the mother and Lock nut from the external thread of the stud of the stand be demolished. To such a tear off, however avoid just need the number of Avoidance of thread breaks required calculated and then the distance between the End face of the pin with its external thread from the inner bottom surface of the end sleeve accordingly to be dimensioned.

The base sleeve and the end sleeve have in screwed together position two diamtral opposite, straight through both sleeves running and from the footprint of the base sleeve on the stand reaching to the end of the ferrule Pressure medium channels on. These are pressure medium channels  basically, but with a one-piece Rotor sleeve known from DE 34 12 319 C1.

These pressure medium channels are in the rotor sleeve with at least two diametrically opposite Through holes in the pin in a conventional manner hydraulically connected. At the free end of the rotor sleeve are two intersecting on different levels Jet nozzles provided. In contrast to the subject of DE 34 12 319 C1 are in the present invention Pressure medium channels in the rotor sleeve on the Footprint of the base sleeve of screws locked. Can be used as screw plugs For example, M 2.5 Allen screws are used with their external thread in a near the Arranged outside of the pressure medium channels Engage the internal thread and either flush with the Complete the end face of the base sleeve or to it are set back.

The base sleeve has one in its interior Circular groove on which the two are parallel to each other its longitudinal symmetry axis extending pressure medium channels hydraulically with each other as well as two diametrically in height this circular groove opposite and in the latter connecting jet nozzles connects. The jet nozzles are opposite one to the longitudinal symmetry axis of the rotor sleeve vertical plane at an angle of approx. 5 ° inclined towards the end face of the base sleeve,  order in the blasting mode by the recoil that occurs Blasting into the pipe wall to be cleaned the hydraulic vortex jet through a automatic "retraction" due to these recoil forces to facilitate.

To avoid undesirable frictional forces between the rotor sleeve and stands due to hydraulic pressures during the To prevent blasting operation is in the Footprint of the stand and / or in this Footprint facing end face of the rotor sleeve a groove extending concentrically to the pin Formation of a floating disc arranged. This is not just any mechanical washer like it is described for example in DE 34 12 319 C1, dispensable, but also the floating disc of the Liquid is any other mechanical disk superior due to the lower frictional forces.

An embodiment of the invention is in the Drawings shown. Show:

Fig. 1 shows the exploded view of the rotor sleeve, nut, washer, sleeve and the base stand,

Fig. 2 is a view of parts of Fig. 1 in screwed together position,

Fig. 3 shows the top view of Fig. 2 in the direction of arrow III,

Fig. 4 shows the view on the hydraulic Whirl in the direction of arrow IV of Fig. 2,

Fig. 5 is a plan view in the direction of arrow V of Fig. 4,

Fig. 6 is a sectional view taken along the line VI-VI of Fig. 4,

Fig. 7 shows the view of the stand of Fig. 1 in an enlarged scale;

Fig. 8 is a sectional view of the stator in the direction of the line VIII-VIII of Fig. 7,

Fig. 9 is a plan view in the direction of arrow IX of FIG. 7,

Fig. 10 shows the diametral section through the disc,

Fig. 11 is a plan view of the disc of Fig. 10,

Fig. 12 shows the diametral section through the nut,

Fig. 13 is a plan view of the nut of FIG. 12,

Fig. 14 is a sectional view of the ferrule in the direction of line XIV-XIV of Fig. 15,

Fig. 15 is a plan view of the ferrule of FIG. 14 in the direction of arrow XV,

Fig. 16 is a sectional view of the ferrule of FIG. 17 in the direction of the line XVI-XVI with the internal thread,

Fig. 17 is a plan view in the direction of arrow XVII of Fig. 16,

Fig. 18 is a sectional view through the rotor sleeve screwed together position in the direction of line XVIII-XVIII of Fig. 3,

Fig. 19 is a sectional view through the base sleeve in the direction of the line XIX-XIX of Fig. 1,

Fig. 20 is the view of the base sleeve of Fig. 19 in the direction of arrow XX and

Fig. 21 is a plan view of the base sleeve of Fig. 20 in the direction of arrow XXI.

The hydraulic Whirl 1 is made according to the exploded view of Fig. 1 comprises a stand 2 with stem 3, a shoulder 4 and an external thread 5 on the one hand, and a base sleeve 6, a disk 7, a nut 8 and a ferrule 9 on the other.

As can be seen from Fig. 1 in connection with Fig. 6, the base sleeve 6 is first pushed onto the pin 3 of the stand 2 , then the disc 7 is placed on the stop 4 and then the nut 8 with its internal thread against the disc 7 and these braced against paragraph 4 . So that the base sleeve 6 is fixed in the axial direction of the double arrow 11 with little axial play, but can rotate freely about the pin 3 . Thereafter, the end sleeve 9 is screwed onto the tubular sleeve 10 , so that in the screwed-together end position of FIG. 6, the pressure medium channels 13 , 14 of the base sleeve 6 and the end sleeve 9 , which can be seen from FIGS . 13 and 17 and run parallel to the longitudinal axis of symmetry 12, run exactly concentrically with one another .

Instead of the two-part design of washer 7 and nut 8 , the invention also allows a one-part design.

To ensure a uniform symmetrical course of the annular space with a circular cross-section within the base sleeve 6 and the end sleeve 9 , the outer circumference 7 a of the washer 7 and the outer circumference 8 a of the nut 8 are also designed in a circular shape, as can be seen from FIGS . 9 to 12.

For additional securing of the nut 8 on the thread 5 of the pin 3 on the one hand and the end sleeve 9 with its internal thread 9 a on the external thread 10 a of the tubular sleeve 10 on the other hand, these threaded surfaces are additionally provided with a metal adhesive which, for example, consists of an anaerobically curing one-component adhesive on the The basis of methacrylates or cyanoacrylates exists and is known under the brand name "Loctite".

Even more elegant a backup of the threaded parts is ensured in that the external thread 5 of the pin 3 and the external thread 10 a of the tubular sleeve 10 6/9 are made the same, depending on the direction of rotation of the rotor sleeve. If, for example, in Figure 3 the rotor sleeve 6/9 rotates the plan view of Fig. In the direction of arrow 15, the thread is provided 5 of the pin 3 with a right hand thread, so that the end face 10 b (s. Fig. 1) of the tubular sleeve 10 at Frictional contact attempts to turn the disc 7 and the nut 8 in the direction of their fixed position.

Similarly, the thread 10 a of the tubular sleeve 10 and the internal thread 9 are designed right-handed a of the ferrule 9, thus also for clockwise rotor sleeve 6/9 according to the arrow 15 of FIG. Due to the mass inertia forces a rotation of the internal thread 9a of the ferrule 9 on the 3 External thread 10 a of the tubular sleeve 10 takes place in its fixed position. However, if the rotor sleeve 6/9 against the direction of the arrow 15 of FIG. 3 not right, but rotates to the left, need to reverse the external thread 10 a of the tubular sleeve 10 and the external thread 5 are designed left-handed the peg 3.

Another additional fuse is shown in FIG. 6. As can be seen from this, the distance A between the end face 16 of the pin 3 and the inner bottom face 17 of the bottom 18 of the base sleeve 9 is made smaller than the height H of the nut 8 . If the nut 8 and the washer 7 are designed in one piece, the total height of the washer 7 and nut 8 must occur instead of the height H. This compulsory distance A to the inner bottom surface 17 of the end sleeve 9 prevents the nut 8 from being unscrewed. This distance is of course dimensioned such that when the nut 8 strikes the bottom surface 17, the threads of the thread 5 of the pin 3 which are still in engagement with the nut 8 prevent their tearing.

As can be seen from FIGS. 1 to 3, the upright 2 with two diametrically opposed key surfaces 2 a, provided b 2 to the entire Whirl 1 light with the non-illustrated hose connection to the thread 20 of FIG. 8 at the lower end 19 to connect the vortex jet nozzle 1 .

The pressure medium channels 13, 14 extend as shown in FIG. 17 in a straight line as well as concentrically aligned by the base sleeve 6 and the ferrule. 9 At the end 9 of the blind bore 9 b c of the ferrule 9 are two in different planes intersecting jet nozzles 21, provided 22nd

On the contact surface 23 of the base sleeve 6 , the pressure medium channels 13 , 14 are closed by two Allen screws 24 , 25 .

In addition, the base sleeve 6 is provided in its interior with an annular groove 26 which, in the assembled position of the hydraulic swirl jet nozzle 1, lies at the level of an outlet bore 27 of the pin 3 . Thereby, the interior is the stand 2 on the multiple stepped channels 29, 30, 31 (s. Fig. 8) hydraulically connected hydraulically to the annular space 26 of the rotor sleeve 6/9 28th At the level of this annular space 26 , two diametrically opposed jet nozzles 32 , 33 are arranged in the base sleeve 6 , which are inclined to the horizontal 34 by a small angle of approximately 5 ° in the direction of the contact surface 23 and thus when the hydraulic swirl jet nozzle 1 is immersed in one Pipe to be cleaned gives a feed force by the recoil of the medium jets emerging through these jet nozzles 32 , 33 and hitting the inner wall of the pipe to be cleaned, which literally "pulls" the vortex jet nozzle 1 with the connected hose into the interior of the pipe to be cleaned.

In this case, the interior 28 is acted on the stator 2 with a pressure of the cleaning medium of about 750 bar, whereby the rotor sleeve 6/9 rotates at a speed of about 900 rev / min. This rotation of the rotor sleeve 6/9 arises from the fact that firstly the two fluidized jet nozzles 21, 22 at the bottom 18 of the ferrule 9 to the plane of the longitudinal axis of symmetry 12 by an equal distance of about 3 mm, and also the jet nozzles 32, 33 to a through the longitudinal axis of symmetry 12 going plane are arranged with an equal distance of about 2.5 mm.

To form a 5 and 8b on the other hand to be prevented by a too high and hence harmful pressure build-up within the interior space 28 of the stator 2 and in the intermediate space between the pin 3 and the interior 35 in the rotor sleeve 6/9 on the other hand for the thread 10 a, 9 a on the one hand and , the end sleeve 9 in the vicinity of the end 9 b of its blind bore 9 c has a relief bore 36 extending transversely through the longitudinal axis of symmetry 12 of the end sleeve 9 with two diametrically opposite outlet openings 37 , 38 which do not intersect the pressure medium channels 13 , 14 . In this way 36 connects the relief bore the interior space 35 of the rotor sleeve 6/9 with the outside atmosphere.

To achieve a low friction as possible run of the rotor sleeve 6/9, with its end face 23 on the supporting surface 39 (s. Fig. 7 and 8) of the stand 2 is in this contact area 39 and / or in which this contact surface 39 facing end surface 23 of the rotor sleeve 6 / 9 a extending concentrically to the pin 3 groove 40 arranged to form a floating disk during the blasting operation of the rotor sleeve 6 /. 9 This eliminates the need for a mechanical disc between the surfaces 23 and 39 , especially since a hydraulic floating disc, due to the cleaning liquid, in each case contributes to less friction between these surfaces than any mechanical disc.

Reference list

1

Whirl jet nozzle

2nd

Stand

2nd

a,

2nd

bArea of the stand

2nd

3rd

Cones

4th

Heel on the spigot

3rd

5

Male thread of the pin

3rd

6

Base sleeve

7

disc

7

aExternal circumference of the pane

7

8th

mother

8th

aExternal circumference of the mother

8th

8th

bThread of the mother

8th

9

End sleeve

9

aInternal thread of the end sleeve

9

9

end of the blind hole

9

c

9

cBack hole in end sleeve

9

10th

Pipe sleeve

10th

aExternal thread of the pipe sleeve

10th

10th

b Face of the pipe sleeve

10th

11

Double arrow

12th

Longitudinal symmetry axis

13

,

14

Pressure medium channels

15

Direction of rotation arrow Rotor sleeve

6

/

9

16

Face of the tenon

3rd

17th

Floor area of the floor

18th

18th

ground

19th

lower end of the Whirl jet nozzle

1

20th

thread

21

,

22

,

32

,

33

Jet nozzles

23

Footprint of the Base sleeve

6

24th

,

25th

Allen screws

26

Circular groove

27

Exit hole in the pin

3rd

28

Interior of the stand

2nd

29

,

30th

,

31

remote channels

34

Horizontal to Longitudinal symmetry axis

12th

35

Interior of the rotor sleeve

6

/

9

36

Relief hole

37

,

38

Outlet openings of the Relief hole

36

39

Footprint of the stand

2nd

40

Groove
ADistance between the face

16

and floor area

17th

Height of the mother

8th

Claims (14)

1. connectable Hydraulic Whirl with a high-pressure line, a central bore and a pin having the stator and with a the stator concentrically surrounds and axially to it via releasable coupling means fixed armature sleeve with jet nozzles, characterized in that the rotor sleeve (6/9) from a base sleeve ( 6 ) with a projecting tubular sleeve ( 10 ) with an external thread ( 10 a) and an end sleeve ( 9 ) with an internal thread ( 9 a) that can be screwed concentrically onto it, the up to the free end region ( 5 a) of the one with External thread ( 5 ) provided pin ( 3 ) extending tube sleeve ( 10 ) of the base sleeve ( 6 ) from a nut ( 8 ) as a releasable coupling means on the pin ( 3 ) against axial displacements (arrow 11 ), but is freely rotatable. 2. Hydraulic vortex jet nozzle according to claim 1, characterized in that the nut ( 8 ) with a washer ( 7 ) against a shoulder ( 4 ) of the pin ( 3 ) is non-rotatably braced. 3. Hydraulic vortex jet nozzle according to claim 1 or 2, characterized in that the nut ( 8 ) with a lock nut against a paragraph ( 4 ) or against each other without a paragraph ( 4 ) against axial displacements (arrow 11 ) on the external thread ( 5 ) of the Pin ( 3 ) is clamped. 4. Hydraulic vortex jet nozzle according to one of claims 1 to 3, characterized in that the nut ( 8 ) and / or the washer ( 7 ) and / or the lock nut against axial displacements (arrow 11 ) on the pin ( 3 ) additionally by a Metal adhesive are secured. 5. Hydraulic vortex jet nozzle according to claim 4, characterized in that the Metal adhesive made from an anaerobic curing one-component Glue based on methacrylates or Cyanoacrylates exist. 6. Hydraulic Whirl according to one or more of claims 1 to 5, characterized in that the external thread (5) of the pin (3) and the external thread (10 a) of the tubular sleeve (10) is equal to the direction of rotation of the rotor sleeve (6/9) are designed. 7. Hydraulic vortex jet nozzle according to claim 6, characterized in that when the rotor rotates clockwise (arrow 15 ) both the external thread ( 10 a) of the tubular sleeve ( 10 ) and the external thread ( 5 ) of the pin ( 3 ) are right-handed. 8. Hydraulic vortex jet nozzle according to claim 6, characterized in that when the rotor rotates to the left, the external thread ( 10 a) of the tubular sleeve ( 10 ) and the external thread ( 5 ) of the pin ( 3 ) run left-handed. 9. Hydraulic vortex jet nozzle according to one or more of claims 1 to 8, characterized in that the distance (A) between the end face ( 16 ) of the external thread ( 5 ) provided end region ( 5 a) of the pin ( 3 ) and the inner Bottom surface ( 17 ) of the end sleeve ( 9 ) is smaller than the height (H) of the nut ( 8 ) or, if a lock nut is used, is smaller than the height of the lock nut. 10. Hydraulic vortex jet nozzle according to one of claims 1 to 9, characterized in that the base sleeve ( 6 ) and the end sleeve ( 9 ) in the screwed position two diametrically opposed, straight through both sleeves and from the contact surface ( 23 ) of the base sleeve ( 6 ) on the stand ( 2 ) to the end region ( 18 ) of the end sleeve ( 9 ) reaching pressure medium channels ( 13 , 14 ). 11. Hydraulic Whirl according to claim 10, characterized in that the pressure medium ducts (13, 14) (6/9) are provided in the runner sleeve having at least two diametrically opposite through bores (27) in the pin (3) in manner known per se in hydraulic communication and are closed by screws ( 24 , 25 ) on the contact surface ( 23 ) of the base sleeve ( 6 ) and are provided at the end region ( 18 ) of the end sleeve ( 9 ) with two jet nozzles ( 21 , 22 ) crossing in different planes. 12. Hydraulic Whirl according to one or more of claims 1 to 11, characterized in that the ferrule (9) across the longitudinal axis of symmetry (12) of the rotor sleeve (6/9) extending relief bore in the vicinity of its end portion (18) (36 ) with two diametrically opposite outlet openings ( 37 , 38 ) which connect the interior ( 35 ) of the end sleeve ( 9 ) with the outside atmosphere. 13. Hydraulic vortex jet nozzle according to one or more of claims 1 to 12, characterized in that the base sleeve ( 6 ) has an annular groove ( 26 ) which the two pressure medium channels ( 13 , 14 ) extending parallel to their longitudinal axis of symmetry ( 12 ) hydraulically with each other as well as connecting two diametrically opposite jet nozzles ( 32 , 33 ) at this circular groove ( 26 ) and opening into the latter. 14. Hydraulic vortex jet nozzle according to one or more of claims 1 to 13, characterized in that in the contact surface ( 39 ) of the stand ( 2 ) and / or in this contact surface ( 39 ) facing end face ( 23 ) of the base sleeve ( 6 ) one is itself disposed concentrically with the pin (3) extending groove (40) to form a floating disk during the blasting operation of the rotor sleeve (6/9).