Tank washing head

Abstract

Tank cleaning head (71) for internal cleaning of tanks, containers and the like, comprising a stationary housing part (8) suitable for connecting the tank cleaning head (71) to a supply hose or supply line through which a cleaning fluid flows into the tank cleaning head (71) under high pressure, wherein a one- or multi-part housing part (25) rotatable about a vertical axis is arranged at one end of the stationary housing part (8), and wherein a nozzle carrier (58) rotatable about a horizontal axis of rotation (66) and driven to rotate by recoil from at least one spray jet of at least one nozzle (59, 59a, b) is arranged on the rotatable housing part (25), wherein the housing parts (8), (25) and the nozzle carrier each have a channel (7, 26, 47) which are coupled to each other in a fluid-conducting manner, wherein the channels (7, 26,47) each have at their mutually facing and sealingly contacting ends a mutually complementary sliding bushing (2, 3, 34, 43) with a sealing surface which forms rotating sealing connections with the sealing surface of the complementarily aligned sliding bushing (2, 3, 34, 43) of the adjoining channel (26, 47).

Description

[0001] The invention relates to a tank washing head according to the preambles of independent claims 1, 6 and 8.

[0002] A tank cleaning head, also called a container cleaning head or tank cleaner, is a specialized tool for cleaning tanks and containers. It is used in various industries to remove contaminants, deposits, and residues from the walls, ceilings, and floors of tanks.

[0003] The tank cleaning head is connected to a pressure washer and, for example, exposed to high-pressure water. The tank cleaning head rotates either due to the force of the water or via its own drive. The head has several nozzles that spray the water at a specific angle and with high precision onto the inner surfaces of the tank.

[0004] Tank cleaning heads are available for various tank sizes and shapes and can be used with different cleaning media such as water, detergents and disinfectants.

[0005] The combination of high-pressure water and rotary motion enables the tank cleaning head to thoroughly and efficiently clean tanks and containers. Cleaning with a tank cleaning head is significantly faster than manual cleaning with brushes and scrapers. The time savings and effective cleaning result in cost savings for tank cleaning.

[0006] Application areas include, for example, the chemical industry for cleaning storage tanks for chemicals, paints, and varnishes; the food industry for cleaning tanks for milk, beverages, oils, and fats; the pharmaceutical industry for cleaning tanks for pharmaceutical products; the water industry for cleaning water tanks and pipelines; and the petrochemical industry for cleaning tanks for fuels and petrochemical products.

[0007] Selecting the right tank cleaning head depends on the size and shape of the tank, the type of contamination, and the specific application requirements. For optimal cleaning results, it is important to use the tank cleaning head correctly and to choose the right cleaning agents and water pressure.

[0008] Tank cleaning heads are known in which at least one nozzle is attached to a nozzle holder that rotates around two axes. The two axes are approximately at right angles to each other in order to achieve a high coverage of the tank surface by the cleaning fluid exiting the nozzle.

[0009] The tank washing heads can be connected via a pressurized water connection to a supply hose or rigid supply line for the supply of high-pressure water, from which the tank washing head is suspended inside the respective interior during cleaning work.

[0010] WO 2021 032 502 A1 shows a tank cleaning head with a stationary housing section, which has a coupling section at one end. Using this appropriately designed coupling section, the tank cleaning head can be connected to a supply line (not shown) through which cleaning fluid can flow into the tank cleaner. The connection can, for example, be a screw connection, in which case the coupling section has a thread that engages with a mating thread on the supply line when the tank cleaner is mounted to the supply line.

[0011] At one end of the stationary housing part, facing away from the coupling section, a rotatable housing part, consisting of one or more parts, is arranged. The axis of rotation of the rotatable housing part can coincide with a longitudinal axis L of the stationary housing part.

[0012] At one end of the stationary housing part, a one- or multi-part housing part rotatable about a vertical axis is arranged, wherein a nozzle carrier rotatable about a horizontal axis of rotation and driven by recoil from at least one spray jet of at least one nozzle is arranged on the rotatable housing part, wherein the housing parts and the nozzle carrier each have a channel which are coupled to each other in a fluid-conducting manner.

[0013] These functional advantages are offset by the fact that such a well-known tank cleaning head is difficult to adapt to the specific application. Furthermore, the risk of leakage is increased, as a reliable seal cannot be achieved.

[0014] The recoil force of the pressurized water exiting the individual nozzles causes the rotation of the individual nozzles and thus of the nozzle shaft. Precise control of the rotational movement of the nozzle shaft is not yet possible; only its deceleration can be achieved.

[0015] The invention is based on the objective of further developing a tank washing head of the type mentioned above in such a way that a braking effect can be achieved and the speed of the nozzle shaft can be influenced using structurally simple means.

[0016] The problem is solved according to the invention by the features of the independent claims, while advantageous embodiments and further developments of the invention can be found in the dependent claims.

[0017] An advantageous feature is that each of the channels has a complementary sliding bushing with a sealing surface at its mutually facing and sealingly contacting ends, which forms a rotating sealing connection with the sealing surface of the complementarily aligned sliding bushing of the adjoining channel.

[0018] The channels are the housing channel of the stationary housing body, the channel in the shaft support body and the nozzle channel of the rotating nozzle shaft, all channels being fluid-conducting and advantageously sealed by means of the sealing bushings.

[0019] The sealing bushings prevent unwanted transfer of substances from one place to another, thus maintaining the pressure of the cleaning medium in the channels. They therefore prevent leakage and loss of cleaning medium.

[0020] The advantages of using sealing bushings also include low friction and ease of maintenance.

[0021] The sealing bushing has a flange that fits into a corresponding recess at the end of the respective channel. This recess represents a radial enlargement of the channel and has a bearing surface on which a wave spring washer is mounted, pressing against the flange of the sliding bushing from the rear. The wave spring washer provides a contact pressure that presses the sealing surfaces of the opposing sliding bushings together.

[0022] The sliding bushings are thus spring-loaded, whereby the cleaning medium striking the edge of the first sliding bushing of a pair of sliding bushings pushes this sliding bushing in the direction of flow.

[0023] Thus, in addition to the spring force of the spring preload, another force, namely the pressure force of the water on the sliding bushing edge, is available to act on the sealing surfaces.

[0024] The sliding bushings are low-wear. The use of hard metal or hard ceramic provides a hard and durable surface that better withstands friction and abrasion and is also corrosion-resistant. In particular, the use of a smooth surface on the sealing surfaces reduces friction, thus minimizing wear.

[0025] The advantages of low-wear sliding bushings lie in their longer service life, as the parts last longer and need to be replaced less frequently, saving costs and protecting the environment. Less wear also means less maintenance required and therefore lower costs.

[0026] Furthermore, low-wear parts can improve performance and efficiency.

[0027] Another feature of the invention is that a bevel gear is mounted non-rotatably on the outer circumference of the nozzle shaft, which meshes with a stationary bevel gear connected to the stationary housing part. The nozzle shaft is arranged at a right angle to the housing part. This allows for a compact design of the tank cleaning head.

[0028] The bevel gears enable more efficient power transmission due to their rolling motion. This results in less friction loss and lower energy consumption, particularly regarding the pressure of the available cleaning medium, which causes the nozzle shaft to rotate relative to the stationary housing part.

[0029] Due to their robust construction and tooth shape, bevel gears can transmit high torques and, thanks to the rolling motion and precise toothing, enable smooth running, are quiet and also have low vibration.

[0030] Due to their robust construction and tooth shape, bevel gears are less susceptible to damage and wear, resulting in a long service life.

[0031] The nozzle shaft, which is set in rotation due to the recoil of the nozzles, is limited in its speed by the meshing of the bevel gear of the nozzle shaft with the stationary bevel gear of the housing part.

[0032] The gear ratio of the two bevel gears determines the speed reduction of the nozzle shaft. This is calculated by the ratio of the number of teeth on the two bevel gears and is preferably 1:2.1.

[0033] This allows the point of impact of the cleaning jet exiting the nozzle to be influenced, thus creating a staggered effect between successive cleaning points within a cleaning cycle. This prevents the pressure jet from always hitting the same spot within the container being cleaned. Consequently, the cleaning effect of the tank cleaning head according to the invention can be improved by adjusting the transmission ratio to the specific cleaning requirements. This allows the cleaning medium to cover 100% of the surface to be cleaned.

[0034] The cleaning fluid supplied to the device under pressure serves as the driving medium for all movements. In this description, the terms cleaning fluid, cleaning medium, and pressure medium are used synonymously. Preferably, this is a high-pressure water jet.

[0035] For example, between 20 and 100 liters per minute can be dispensed via the nozzle(s).

[0036] Preferably, the nozzles are two nozzles with an inclination between 20° and 45° relative to a straight line through the center of the nozzle carrier.

[0037] Another feature of the invention is that the rotational movement about the longitudinal axis can be slowed down by means of a drive connection between the housing shaft and a magnetic brake. This is preferably an eddy current brake.

[0038] An eddy current brake, also called an induction brake, is a non-contact brake that uses eddy currents to slow down a rotating shaft, such as the housing shaft in this case. The eddy currents are generated by a magnetic field induced relative to the movement of the conductive object.

[0039] The magnetic field is generated by permanent magnets arranged in a circle and aligned along the axis. A copper ring surrounding the circular path of the permanent magnets, and arranged concentrically to them, forms a conductive object that moves relative to the magnetic field. The movement of the conductive copper ring in the magnetic field induces eddy currents in the copper ring, which generate a Lorentz force that opposes the direction of movement of the copper ring and slows it down.

[0040] Because it is a contactless brake, there is no wear from friction, making the brake low-maintenance and giving it a long service life. Furthermore, the brake operates quietly and with minimal vibration, ensuring smooth operation of the tank cleaning head.

[0041] This eddy current brake thus consists of a permanent magnet stator, formed, among other things, by the permanent magnets, which is arranged non-rotatably on the coupling section, and of a rotor, formed, among other things, by the copper ring in the copper ring carrier, which is supported on the housing shaft non-rotatably but axially displaceably via an adjusting screw.

[0042] Thus, by axially adjusting the copper ring relative to the permanent magnets, the overlap can be adjusted, and therefore also the strength of the magnetic field, allowing for precise control of the braking force.

[0043] By loosening the adjusting screw, the rotor can be axially adjusted relative to the stator, so that the rotor and stator can overlap axially to different degrees and the eddy currents occurring during relative rotations between rotor and stator have correspondingly different strengths, with the result that the braking effect can be adjusted by axially adjusting the rotor.

[0044] The copper ring carrier is at least partially covered by a pot-shaped splash guard, the lower edge of which is axially displaceable relative to a scale on the lateral surface of the copper ring carrier.

[0045] The levels of the scale indicate the degree of eddy current braking power, which can be read by means of the lower edge positioned on the respective level.

[0046] The eddy current braking power is available in 100%, 75%, 50%, 25%, and 0% increments, with the value referring to the reduced rotational speed of the nozzle shaft and main axis due to the braking effect. The setting is adjusted so that the rotational speed does not exceed 60 rpm, at a possible pressure between 40 and 150 bar.

[0047] A setting of 0%, a pressure of 120 bar, and a water flow rate of 52 l / min results in a speed of 100 rpm, which is not optimal. At 0% eddy current braking power, no braking effect is achieved.

[0048] Therefore, the copper ring carrier is moved upwards to increase the coverage of the copper ring with the permanent magnets, for example to 75%, which can be read from the lower edge of the splash guard on the scale.

[0049] When the speed is reduced to 25%, at a pressure of 120 bar, the same amount of water (52 l / min) flows from the nozzle(s), but due to the braking effect, the rotational speed is only 55 revolutions / min, which is below the limit of 60 revolutions per minute and is therefore considered good.

[0050] With an eddy current braking power of 50%, the rotational speed is only 31 revolutions per minute at a water pressure of 120 bar.

[0051] The subject matter of the present invention is not only derived from the subject matter of the individual patent claims, but also from the combination of the individual patent claims with one another.

[0052] All information and features disclosed in the documents, including the abstract, and in particular the spatial configuration shown in the drawings, could be claimed as essential to the invention, insofar as they are novel individually or in combination compared to the prior art. The use of the terms "essential," "according to the invention," or "essential to the invention" is subjective and does not imply that the features so designated must necessarily be part of one or more patent claims.

[0053] The invention is explained in more detail below with reference to drawings illustrating only one embodiment. Further essential features and advantages of the invention will become apparent from the drawings and their description.

[0054] They show: Figure 1 : a partial exploded view of the tank wash head Figure 2 : a sectional view of the tank cleaning head Figure 3 : another sectional view showing the sealing bushings Figure 4 : a sectional view of the nozzle carrier with nozzles Figure 5 : a perspective view of the tank wash head Figure 6 : a cross-sectional view of the eddy current brake Figure 7 : a distorted perspective view of the bevel gear

[0055] Figure 1Figure 71 shows the tank cleaning head 71 with a coupling section 72. A disc-shaped nozzle carrier 58 with spray nozzles, hereinafter referred to as nozzles 59 a, b, is arranged on a nozzle shaft 48 (not shown in this figure). The nozzles 59 of the nozzle carrier 58 are supplied with high-pressure water via the hollow nozzle shaft 48 and the hydraulically communicating pressurized water connection formed by the coupling section 72, so that high-pressure spray jets emerge from the nozzles 59. The recoil of the spray jets sets the nozzle carrier 58 and the nozzle shaft 48 into rotation in the direction of arrow 67.

[0056] The tank washing head 71 is used for the internal cleaning of tanks, containers and the like and has a stationary housing part 8 which has a coupling section 72 at a first end for connecting the tank washing head 71 to a supply hose or supply line through which a cleaning fluid flows under high pressure.

[0057] In the following, the terms housing part and housing body are used synonymously for reference numeral 8.

[0058] At the end of the stationary housing part 8 facing away from the coupling section 72, a housing part 25 is arranged which is rotatable about a vertical axis, wherein the axis of rotation of the rotary movement of the rotatable housing part 25 coincides with a longitudinal axis 68 of the stationary housing part 8.

[0059] The housing part 25 is connected to the housing shaft 9 in a rotationally fixed manner.

[0060] The nozzle carrier 58, which is rotatable about a second axis of rotation 66 and is driven by recoil from at least one spray jet of at least one nozzle 59, 59a, b, is attached to the rotatable housing part 25.

[0061] According to Figure 2The housing parts 8, 25 and the nozzle carrier 58 each have a channel 7, 26, 47, which are coupled to each other in a fluid-conducting manner. At their mutually facing and sealingly contacting ends, the channels 7, 26, 47 each have a complementary sliding bushing 2, 34 with a sealing surface 13, 41, which forms rotating sealing connections with the sealing surface 14, 42 of a correspondingly complementary sliding bushing 3, 43 of the adjoining channel 26, 47.

[0062] By means of a drive connection of the housing shaft 9 with an eddy current brake 85, the rotational speed of housing shaft 9 and housing part 25 is slowed down in order to influence the cleaning effect of the high-pressure spray jets.

[0063] Furthermore, the recoil of the high-pressure spray jets causes a rotation of the nozzle shaft 48 relative to the housing body 8, whereby a gear arrangement 52, 53 can influence the rotational movement and speed of the nozzle shaft.

[0064] When the nozzle carrier 58, arranged on the nozzle shaft 48, is set in rotation by the recoil of its spray water jets, the bevel gear 52 is rotated accordingly via the nozzle shaft 48 and meshes with the bevel gear 53, which is fixedly connected to the housing part 8. This necessarily limits the rotation of the nozzle shaft.

[0065] The bevel gears are connected to the shafts or housing parts in a rotationally fixed manner via at least one tolerance sleeve or an adhesive bond.

[0066] The eddy current brake 85 essentially consists of a permanent magnet stator 86, which is fixedly mounted on the stepped housing carrier 84 by means of a cylindrical magnet carrier 91, and a rotor 87, which is supported on the housing shaft 9 in a rotationally fixed but axially displaceable manner. In the example shown, the housing carrier 84 has the coupling section 72 for connection to a high-pressure line or hose.

[0067] By means of an adjusting screw 83, as described in Figure 5As shown, and which is guided through the copper ring carrier 90 and whose threaded shaft allows a fixing / clamping to the housing shaft 9, the rotor 87 can be axially adjusted relative to the stator 86, so that rotor 87 and stator 86 overlap axially to different degrees and the eddy currents occurring during relative rotations between rotor 87 and stator 86 have correspondingly different strengths, with the result that the braking effect can be adjusted by axial adjustment of the rotor 87.

[0068] Figure 3 A high-pressure water jet, which shoots in the direction of arrow 1 through the housing channel 7 of the housing part 8, strikes the upper edge 4 of the upper sliding bushing 2 and pushes it minimally in the direction of arrow 1. The edge 4 is the circular and end face of the cylindrical part of the sliding bushing.

[0069] This movement is supported by the spring action of the wave spring washer 19, which is clamped between the bearing surface 6 of the housing part 8 and the upper surface of the collar 20 of the sliding bushing 2. Thus, the pressure force of the water and the spring force of the wave spring washer 19 push the sliding bushing 2 in the direction of arrow 1 and thus in the direction of the sliding bushing 3, so that the sealing surface 13 of the sliding bushing 2 rests on the sealing surface 14 of the sliding bushing 3 to achieve a sealing effect.

[0070] The sliding bushing 3 is in turn mounted with its collar 22 and a wave spring washer 24 in a recess 12, the wave spring washer 24 itself resting on the support surface 15 inside the channel 7.

[0071] Due to the spring action of the two wave spring washers 19 and 24 and the pressure applied in the direction of arrow 1, a sealing effect is achieved between the two sealing surfaces 13, 14. This allows the housing body 8 to be sealed against the shaft support body 25, which is movable relative to it.

[0072] To improve the sealing effect, the sealing surfaces 13, 14 are highly machined and the recesses 10, 12 of the surrounding housing each have an annular groove into which a sealing ring 17, 18 is fitted, which seals against the outer surface of the cylinder body 21, 23 of the respective sliding bushing.

[0073] The sliding bushings are made of hard metal or a technical ceramic, which has the advantage that they are virtually wear-free.

[0074] Within the housing part 25, the water is guided through an angled channel 26 and has a further recess 27 at the outlet area, in which a sliding bushing 34 is received. The water then strikes the edge 33 of the sliding bushing 34 and presses it in the direction of arrow 35.

[0075] In the recess 27, a bearing surface 36 is provided on which a wave spring washer 37 rests, pressing against a collar 38 of the sliding bushing 34. Below the collar 38, the sliding bushing 34 has a cylindrical body 39 against which a sealing ring 40 of the housing part 25 rests.

[0076] The spring force of the wave spring washer 37 and the pressure of the water on the collar 38 press the sealing surface 41 of the sliding bushing 34 against the sealing surface 42 of the sliding bushing 43. This in turn has a collar 44, between which and a bearing surface 46 of the nozzle channel 47 of the nozzle shaft 48 another wave spring washer 49 is arranged.

[0077] Below the collar 44, the sliding bushing 43 has a cylindrical body 45, on the outer surface of which a sealing ring 50 of the nozzle shaft 48 rests.

[0078] The wave spring washer 49 generates a spring effect against the direction of movement 35 of the water, which presses the sealing surface 42 against the sealing surface 41.

[0079] A bevel gear 52 is mounted on the cylindrical surface 51 of the nozzle shaft 48, the teeth of which engage with the teeth of the stationary bevel gear 53, which has a sleeve extension 54 integrated into the material. The bevel gear 53 and the sleeve extension 54 thus form a single component.

[0080] To support a rotational movement of the nozzle shaft 48 relative to the housing part 25, the nozzle shaft is supported by means of at least one bearing 55 within the axle body 11, which is connected to the housing part 25 in a rotationally fixed manner.

[0081] Figure 4Figure 1 shows the nozzle carrier 58 located at the end of the nozzle shaft 48, on which, in the example shown, two nozzles 59a, b are mounted. These are screwed into the nozzle mounting positions 60a, b, with two further nozzle mounting positions 60c, d available for additional nozzles. In the example shown, these are closed with the screwed-in plugs 61a, b.

[0082] Via a central bore 62, the pressurized water is directed into the bores 63 a, b of the nozzle mounting positions 60a, b, as shown by the flow path, which are flow-conductingly connected to the bores 79a, b of the nozzles 59a, b, which at the end discharge the pressurized water into the environment in the directions of arrows 64, 65.

[0083] Due to the orientation of the nozzle longitudinal axes at an angle of 20° to an axis through the center of the nozzle carrier, and due to the recoil of the cleaning medium 69, the nozzle support head 58 rotates about the axis 66 in the direction of arrow 67.

[0084] Figure 5 The adjusting screw 83 is shown, which passes through the copper ring carrier 90 and whose threaded shaft is screwed into a corresponding threaded bore in the copper ring carrier 90. This adjusting screw 83 serves to clamp / fix the copper ring carrier 90 (rotor 87) on the housing shaft 9 after the eddy current braking power has been set according to the scale. The adjusting screw 83 allows the rotor 87 to be continuously adjusted axially relative to the stator 86, so that the rotor 87 and stator 86 overlap to varying degrees axially and the eddy currents occurring during relative rotations between rotor 87 and stator 86 have correspondingly different strengths. Thus, the braking effect can be adjusted by axially adjusting the rotor 87.

[0085] The axial displacement can be read from a scale 82 on the lateral surface of the copper ring carrier 90. The scale covers the area in Figure 1The splash guard 92 shown covers the outer surface of the copper ring carrier 90, with the scale being moved by axial adjustment relative to the edge or the lower edge 94. The scale is marked with the levels 0%, 25%, 50%, 75%, and 100%, each representing a reduction in eddy current braking power. The 25% position, read from the lower edge 94, means that only 25% of the previous 100% eddy current braking power is being applied.

[0086] Opposite the adjusting screw 83, there is a cylinder head screw which serves as an anti-rotation device and as an upper and lower longitudinal stop within the groove in the housing shaft 9. This is bonded firmly in place during assembly and cannot be loosened by the user.

[0087] Figure 6Figure 1 shows a cross-sectional view of the eddy current brake 85, which is arranged concentrically around the housing channel 7. The permanent magnets 88 are bonded in a circular pattern to a magnet carrier 91. The copper ring 89 is positioned slightly apart from the magnets and is held by the copper ring carrier 90. The copper ring carrier 90 and the copper ring 89 together form the rotor, which can be moved axially relative to the splash guard 92 to influence the magnetic field and thus the braking effect.

[0088] Figure 7The figure shows the gear arrangement, which is mainly formed by the smaller bevel gear 52 and the stationary bevel gear 53. The rotating bevel gear 52 is non-rotatably connected to the nozzle shaft (not shown), which in turn is connected to the nozzle carrier 58. A recoil-induced rotational movement of the nozzle carrier 58 is thus transmitted to the bevel gear 52, which meshes with the bevel gear 53. While the bevel gear 53 is stationary, the surrounding housing shaft 9 and the connected housing part 25 rotate. The nozzle shaft 48 rotates relative to this. The rotations of the nozzle shaft are controlled by the meshing bevel gears 52 and 53, which preferably have a gear ratio of 1 / 2.1. The nozzle shaft is mounted within the axle body 11, which is non-rotatably connected to the housing part 25. Drawing legend

[0089] 1. Direction of arrow 2. Sliding bushing 3. Sliding bushing 4. Edge 5.. 6. Bearing surface 7. Housing channel 8. Housing part (vertical) 9. Housing shaft 10. Recess (for 2) 11. Shaft body 12. Recess (for 3) 13. Sealing surface 14. Sealing surface 15. Bearing surface 16.. 17. Sealing ring 18. Sealing ring 19. Wave spring washer 20. Collar 21. Cylinder body 22. Collar 23. Cylinder body 24. Wave spring washer 25. Housing part 26. Channel 27. Recess 28.. 29.. 30. Wave spring washer 31. Collar 32.. 33. Edge 34. Sliding bushing 35. Direction of arrow 36. Bearing surface 37. Wave spring washer 38. Collar 39. Cylinder body 40. Sealing ring 41. Sealing surface 42. Sealing surface 43. Sliding bushing 44. Flange 45. Cylinder body 46. Bearing surface 47. Nozzle channel 48. Nozzle shaft 49. Wave spring washer 50. Sealing ring 51. Circumferential surface 52. Bevel gear (rotating) 53. Bevel gear (stationary) 54. Sleeve extension (of 53) 55. Bearing 56. 57. 58. Nozzle holder 59. Nozzle a, b 60. Nozzle mounting position a, b, c, d 61. Plug a, b 62. Bore 63. Bore a, b 64. Arrow direction 65. Arrow direction 66.67. Axis of rotation 68. Direction of arrow 69. Longitudinal axis 70.. 71. Flow path 72. Tank wash head 73. 74.. 75.. 76.. 77.. 78.. 79. a, b Bore (of the nozzle) 80.. 81.. 82. Scale 83. Adjusting screw 84. Housing support 85. Eddy current brake 86. Stator 87. Rotor 88. Permanent magnet 89. Copper ring 90. Copper ring support 91. Magnet support 92. Splash guard 93.. 94. Lower edge (of 92)

Claims

1. Tank cleaning head (71) for internal cleaning of tanks, containers and the like, comprising a stationary housing part (8) suitable for connecting the tank cleaning head (71) to a supply hose or supply line through which a cleaning fluid flows into the tank cleaning head (71) under high pressure, wherein a one- or multi-part housing part (25) rotatable about a vertical axis is arranged at one end of the stationary housing part (8), and wherein a nozzle carrier (58) rotatable about a horizontal axis of rotation (66) and rotatable by recoil from at least one spray jet of at least one nozzle (59, 59a, b) is arranged on the rotatable housing part (25), wherein the housing parts (8), (25) and the nozzle carrier each have a channel (7, 26, 47) which are coupled to each other in a fluid-conducting manner. characterized by the fact thatThe channels (7, 26, 47) each have at their mutually facing and sealingly touching ends a mutually complementary sliding bushing (2, 3, 34, 43) with a sealing surface which forms rotating sealing connections with the sealing surface of the complementarily aligned sliding bushing (2, 3, 34, 43) of the adjoining channel (26, 47).

2. Tank washing head (71) according to claim 1, characterized by the fact that the sliding bushings (2, 3, 34, 43) are spring-loaded.

3. Tank washing head (71) according to claim 1 or 2, characterized by the fact that Each sliding bushing (2, 3, 34, 43) is fitted into a recess at the end of the respective channel (7, 26, 47) and presses with its sealing surface against the sealing surface of the oppositely arranged sliding bushing (2, 3, 34, 43).

4. Tank washing head (71) according to one of claims 1 to 3, characterized by the fact thatthe housing channel (7) of the stationary housing body (8) and the nozzle channel (47) of the rotating nozzle shaft (48) are connected via a channel (27) in the shaft support body (25) in a fluid-conducting manner.

5. Tank washing head (71) according to claim 4, characterized by the fact that On bearing surfaces (36, 46) in the area of ​​the end of the respective channel, a wave spring washer (19, 30, 37, 49) rests, the spring force of which acts on the reverse side on a collar (20, 22, 31, 38) of the sliding bushing.

6. Tank cleaning head (71) for internal cleaning of tanks, containers and the like, comprising a stationary housing part (8) suitable for connecting the tank cleaning head (71) to a supply hose or supply line through which a cleaning fluid flows into the tank cleaning head (71) under high pressure, wherein a one- or multi-part housing part (25) rotatable about a vertical axis is arranged at one end of the stationary housing part (8), and wherein a nozzle carrier (58) rotatable about a horizontal axis of rotation (66) and rotatable by recoil from at least one spray jet of at least one nozzle (59, 59a, b) is arranged on the rotatable housing part (25), wherein the housing parts (8), (25) and the nozzle carrier each have a channel (7, 26, 47) which are coupled to each other in a fluid-conducting manner. characterized by the fact thata bevel gear (52) is mounted non-rotatably on the outer circumference of the nozzle shaft (48), which meshes with a stationary bevel gear (53) which is connected to the stationary housing part (8).

7. Tank washing head (71) according to claim 6, characterized by the fact that The gear ratio of the two bevel gears (52, 53) is 1 to 2.

1.

8. Tank cleaning head (71) for internal cleaning of tanks, containers and the like, comprising a stationary housing part (8) suitable for connecting the tank cleaning head (71) to a supply hose or supply line through which a cleaning fluid flows under high pressure into the tank cleaning head (71), wherein a one- or multi-part housing part (25) rotatable about a vertical axis is arranged at one end of the stationary housing part (8), and wherein a nozzle carrier (58) rotatable about a horizontal axis of rotation (66) and rotatable by recoil from at least one spray jet of at least one nozzle (59, 59a, b) is arranged on the rotatable housing part (25), wherein the housing parts (8), (25) and the nozzle carrier each have a channel (7, 26, 47) which are coupled to each other in a fluid-conducting manner. characterized by the fact thatby means of a drive connection of the housing part (25) with a brake (85) the rotational movement about the longitudinal axis (68) can be slowed down.

9. Tank washing head (71) according to claim 8, characterized by the fact that the brake is an eddy current brake (85) and consists of a permanent magnet stator (86) which is arranged non-rotatably on the coupling section (72) and of a rotor (87) which is supported on the housing shaft (9) via an adjusting screw (83) so as to be non-rotatable but axially displaceable.

10. Tank washing head (71) according to claim 9, characterized by the fact that By loosening the adjusting screw (83) the rotor (87) is axially adjustable relative to the stator (86), so that the rotor (87) and stator (86) overlap axially to different degrees and the eddy currents occurring during relative rotations between the rotor (87) and stator (86) have correspondingly different strengths, with the result that the braking effect can be adjusted by axially adjusting the rotor (87).

11. Tank washing head (71) according to one of claims 8 to 10, characterized by the fact that the rotor (87) includes a copper ring carrier (90) which holds a copper ring (89) concentrically opposite an internal, ring-shaped arrangement of permanent magnets (88) of the stator (86).

12. Tank washing head (71) according to claim 11, characterized by the fact that the copper ring carrier (90) is at least partially covered by a cup-shaped splash guard (92), wherein the lower edge (94) of the splash guard (92) is axially displaceable relative to a scale (82) on the lateral surface of the copper ring carrier (90).

13. Tank washing head (71) according to claim 12, characterized by the fact that The levels of the scale (82) indicate the degree of braking effect of the eddy current brake, which can be read by means of the lower edge (94) positioned on the respective level.

14. Tank washing head (71) according to one of the preceding claims, characterized by the fact thatThe cleaning fluid supplied to the tank washing head under pressure serves as the driving medium for all movements.

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