EP1521704A1 - Flushing device - Google Patents
Flushing deviceInfo
- Publication number
- EP1521704A1 EP1521704A1 EP03738855A EP03738855A EP1521704A1 EP 1521704 A1 EP1521704 A1 EP 1521704A1 EP 03738855 A EP03738855 A EP 03738855A EP 03738855 A EP03738855 A EP 03738855A EP 1521704 A1 EP1521704 A1 EP 1521704A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flushing
- flow
- liquid
- turbine wheel
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B57/00—Tank or cargo hold cleaning specially adapted for vessels
- B63B57/02—Tank or cargo hold cleaning specially adapted for vessels by washing
Definitions
- the present invention relates to a flushing device for internal flushing of tanks, preferably ship's tanks, wherein at least one pipe for flushing liquid is rotatably mounted in the tank.
- the flushing-liquid pipe has at least one flushing nozzle which is pivotally mounted relative to the flushing-liquid pipe.
- a supply conduit is provided to feed flushing liquid to the flushing-liquid pipe and through said pipe to the flushing nozzle, which is adapted to direct jets of flushing liquid towards the inner sides of the tank.
- the supply conduit comprises a through-flow member, in which a through-flow passage is provided for flowing through of flushing liquid.
- a turbine wheel is rotatably mounted in said through-flow passage such that said tur- bine wheel is brought to rotate by means of flushing liquid flowing through the through-flow passage.
- At least one by-pass device is provided to feed flushing liquid past the through-flow passage such that only a portion of the flow of flushing liquid flows therethrough.
- the turbine wheel is provided to operate a driving device located outside the supply conduit, said driving device being provided to bring the flushing-liquid pipe to rotate and simultaneously the flushing nozzle to pivot.
- Flushing devices for flushing ship's tanks are al- ready known from EP 0 723 909. It is also known to provide flushing devices with by-pass devices to see to that a part of the flushing water flows past the through-flow passage in which the turbine wheel is located. The purpose of these by-pass devices is to reduce the flow of flushing liquid through the through-flow passage and thus, the rotation of the turbine wheel.
- Prior art by-pass devices are however complex, ineffective and voluminous, which means that the costs for manufacturing the flushing device are high. Furthermore, they do not permit setting of the rotary speed of the flushing-liquid pipe within a sufficient wide setting range when the flow of flushing liquid through the flushing device lies within a wide flow range. It is therefore necessary to supply several various flushing devices in order to cover a wide flow range, which for many reasons is disadvantageous.
- the object of the present invention is to provide a flushing device at which said drawbacks are eliminated and this is arrived at according to the invention by providing the flushing device with the characterizing features of subsequent claim 1.
- said device will have a functional and cost efficient by-pass device which also permits use of the flushing device within a substantially wider flow range for the flushing-liquid flow.
- figure 1 is a schematic side view of a flushing device according to the invention mounted on a tank for in- ternal flushing of said tank;
- figure 2 is a section through a part of the flushing device of figure 1, wherein a turbine wheel is set in a lower position;
- figure 3 is a section through a part of figure 2, wherein the turbine wheel is located in an upper position;
- figure 4 is a section through members in the flushing device along the line IV-IV in figure 2;
- figure 5 is a perspective view of a section through parts of the flushing device;
- figure 6 illustrates with another perspective view the same section as figure 5;
- figure 7 is a perspective view of a section through parts of the flushing device having as a first alternative designed members;
- figure 8 illustrates with another perspective view the same section as figure 7;
- figure 9 is a perspective view of a section through parts of the flushing device having as a second alternative designed members;
- figure 10 illustrates with another perspective view the same section as figure 9 ;
- FIG. 1 schematically illustrates a flushing device 1 for internal flushing of tanks 2, preferably ship's tanks, with a suitable flushing liquid S.
- the flushing device 1 includes a supply conduit 3 which is connected to a verti- cally directed pipe 4.
- This pipe 4 is located above the upper side 5 of the tank 2 and includes a mounting plate 6 through which it is mounted on said upper side 5.
- the pipe 4 has a bearing member 7 in which upper parts 8 of a vertically directed flushing-liquid pipe 9 are rotatably journalled about a vertical geometric axis.
- the flushing- -liquid pipe 9 extends a suitable distance down into the tank 2 and it includes at least one flushing nozzle 10 which is mounted in the tank 2 such that it can direct jets SS of flushing liquid towards the inner sides, top and bottom of the tank 2.
- the flushing liquid S is fed from the supply conduit 3, the pipe 4 and the flushing- -liquid pipe 9 to the flushing nozzle 10.
- a through-flow member 11 of the supply conduit 3 includes a pipe member 12 defining a through-flow passage 13 for flushing liquid S and in this through-flow passage 13 there is mounted a turbine wheel 14 which is provided to be rotated by the flow F of flushing liquid through the through-flow passage 13.
- the rotary movement of the turbine wheel 14 is transmitted out of the supply conduit 3, preferably be means of a magnetic coupling 16, through a closed and eventually openable portion 15 of the wall of the supply conduit 3.
- the magnetic coupling 16 may e.g. be designed as described and illustrated in EP 0 723 909.
- the driving device 17 may e.g. be designed as defined in EP 0 723 909 and thus comprise a gear box 18 for reducing the speed of the rotary movement coming from the turbine wheel 14.
- the reduced rotary movement is transmitted from the gear box 18 to a rotary gear mechanism 19, 20 which rotates a vertically directed pipe 21.
- This pipe 21 cooperates in turn with the flushing-liquid pipe 9 for rotation thereof in the direction of rotation Rl .
- the rotary movement from the gear box 18 is also transmitted to a gear mechanism in which a rotating member 22 transmits its rotary movement to a linearly up- and downwards moving member 23.
- This member 23 cooperates with a vertically directed and linearly up- and downwards moving rod 24, which extends downwards through the pipe 21 and the flushing-liquid pipe 9 and cooperates through a gear 25 with the flushing nozzle 10 for pivoting said nozzle about the horizontal axis in the direction of rotation R2.
- the turbine wheel 14 consists of a hub 26 with a number of outwardly directed turbine blades 27 which are located in the through-flow passage 13 such that the turbine wheel 14 is rotated by the flow of flushing liquid therethrough.
- the turbine wheel 14 can preferably be set in the longitudinal direction of the through-flow passage 13 such that its rotary speed increases with the distance said turbine wheel 14 is moved into said through- -flow passage 13.
- This controllability or adjustment is arrived at by means of a suitable setting device which may include a pin 28 with outer or external threads, through which it is screwed into a threaded hole 29 in the through-flow member 11 beneath the through-flow passage 13.
- Lower parts of the hub 26 of the turbine wheel 14 cooperate with the pin 28 through a spherical bearing 30, which permits rotation of the turbine wheel 14 relative to said pin 28.
- Upper parts of the hub 26 of the turbine wheel 14 intervene displaceably in a sleeve 31 with an inner screw spring 32 and the hub 26 transmits or trans- fers its rotary movement to the sleeve 31.
- the sleeve 31 cooperates with an inner member 16a of the magnetic coupling 16 located within the closed portion 15 of the supply conduit 3 and said inner member 16a cooperates with an outer member 16b of the magnetic coupling 16.
- the turbine wheel 14 can be moved or displaced between a lower and an upper position relative to the pipe member 12 and can be set in these and other positions therebetween such that the distance between those parts of the turbine wheel 14 defining the through-flow passage 13 and the pipe member 12 can be varied.
- the turbine wheel 14 is set in a lower position in which it is entirely or to the greater part located in the through-flow passage 13.
- the hub 26 and turbine blades 27 of the turbine wheel 14 taper, preferably conically, in the direction of flow of the flow Fl of flushing liquid through the through-flow passage 13.
- the pipe member 12 or at least the inner side thereof has a corresponding tapering shape, preferably conically tapering shape in said direction of flow.
- the flushing device 1 includes a by-pass device 33 for feeding flushing liquid S past the through-flow passage 13, such that only a portion Fl of the flow F of flushing liquid flows through the through-flow passage 13, while the remaining portion F2 of the flow F of flushing liquid flows through the by-pass device 33.
- the by-pass device 33 includes at least one by-pass passage 34 which is provided in the same through-flow member 11 as the turbine wheel 14, i.e. inside the through- -flow member 11 forming part of the supply conduit 3 and in which the pipe member 12 is found.
- the by-pass device 33 becomes functional and cost efficient inter alia because it is built into a part of the supply conduit 3 close to the turbine wheel 14.
- the pipe member 12 and the through-flow member 11 define the by-pass device 33.
- the outer diameter of the pipe member 12 is e.g. less or smaller than the diameter of the parts of the through-flow member 11 surrounding the pipe member 12 and the pipe member 12 has a number of, e.g.
- the flanges 35 are dimensioned such that they with outer edges engage the inner side of the through-flow member 11 and they are adapted for locating the pipe member 12 relative to the through-flow member 11 such that the by-pass passage 34 is defined therebetween.
- the outer side of the pipe member 12, the sides of the flanges 35 and the inner side of the through-flow member 11 together define the by-pass passage 34 (in this embodiment divided into four members) through which the portion F2 of the flow F of flushing liquid can flow.
- the flanges 35 and thereby, the pipe member 12 can preferably be released from the through-flow member 11 for demounting the pipe member 12 therefrom and they can be as long or substantially as long as the pipe member 12.
- the by-pass passage 34 may e.g. be designed such that it permits the portion F2 of the flow F of flushing liquid flowing therethrough to be larger than the portion Fl of the flow F of flushing liquid flowing through the through-flow passage 13.
- a flow controlling or regulating device 36 can be provided on the turbine wheel 14 or on members connected thereto. This flow control device 36 is adapted to define a through-flow gap 37 with the pipe member 12 for flushing liquid S.
- the flow control device 36 is displaceable relative to the pipe member 12 by moving or displacing the turbine wheel 14 in an axial direction relative to the pipe member 12 for varying the size of the through-flow gap 37 and thereby, the volume of flow of flushing liquid through the through-flow gap 37.
- the flow control device 36 is preferably provided downstream of the pipe member 12 such that it defines the through-flow gap 37 with a lower edge of the pipe member 12 and such that the through-flow gap 37 is larger when the turbine wheel 14 is set close to the pipe member 12 - as is shown in figure 1 - than if the turbine wheel 14 is set farther away from the pipe member 12 - as is shown in figure 2.
- the flow control device 36 is situated at a certain distance from the pipe member 12 - e.g. also in a lower position - while when the turbine wheel 14 is set farther away from the pipe member 12 - e.g.
- the flow control device 36 is situated at a less or smaller distance from the pipe member 12 - e.g. also in a position above the lower position - in order to throttle the flow Fl of flushing liquid in the through- -flow passage 13.
- the flow control device 36 can be provided trans- verse relative to the direction of flow of the flushing- -liquid flow Fl through the through-flow passage 13 and it can have an outer diameter which corresponds or substantially corresponds with the diameter of the closest parts of the through-flow passage 13.
- the flow control device 36 can be designed as a circular or substantially circular washer 38.
- the washer 38 is preferably provided transverse relative to the direction of flow of the flow Fl of flushing liquid through the through-flow passage 13 and it preferably has an outer diameter which substantially corresponds with the diameter of the nearest parts of the through-flow passage 13.
- the flow cont- rol device 36 may instead be located upstream of the pipe member 12.
- the pipe member 12 may be cylindrical instead of conical and the flow control device 36 can be located downstream of the pipe member 12.
- FIGS 9 and 10 there is shown an embodiment with the same cylindrical pipe member 12 as in figures 7 and 8, but with the flow control device 36 located upstream of the pipe member 12.
- the flushing device described above permits relative to prior art flushing devices, the following should be mentioned while referring to the diagrams of figures 11 and 12.
- a prior art flushing device may e.g. be built for a flushing-liquid pressure of 8 bar (the pressure is gene- rated in a manner known per se by means of a pump device) and a flow volume of flushing liquid of about 30 m 3 /h.
- the rotary speed of the flushing-liquid pipe 9 may in this embodiment be set within the setting range 0,5 - 1,5 rpm, which is a common range or interval for the rotary speed of flushing-liquid pipes.
- the setting range is so narrow that the rotary speed of the flushing-liquid pipe can no longer be set within the common range or interval of about 0,5 - 1,5 rpm. This is illustrated in the diagram of figure 11 by the taper of the setting range from 15 m 3 /h and by the very narrow setting range at 30 ⁇ vVh.
- the by-pass passage 34 permits bringing a portion F2 of the flow F of flushing liquid to flow through the by-pass passage 34 such that the setting range for setting the rotary speed of the flushing-liquid pipe 9 - as is shown in the diagram of figure 12 - can be varied within the common range or interval of about 0,5 - 1,5 rpm at a flow volume of the flushing liquid S of up to 45 m 3 /h.
- Said flushing device 1 with a by-pass device 33 may thus be used for setting the common range or interval of about 0,5 - 1,5 rpm for the rotary speed of the flushing-liquid pipe 9 within a much larger range or interval for the flow volume of the flushing liquid than what previously has been possible with prior art flushing devices.
- a wide, non-tapering setting range for the rotary speed of the flushing liquid pipe 9 is obtained - as is shown in the diagram of figure 13 - meaning that the rotary speed of the flushing-liquid pipe 9 can be controlled or varied within the common interval of about 0,5 - 1,5 rpm at flushing-liquid flows up to e.g. 55 m 3 /h or to the maximum capacity of the flushing device 1 regarding flushing-liquid flows in m 3 /h.
- said by-pass device 33 together with the flow control device 36 permit setting of the rotary speed of the flushing-liquid pipe within the common interval of about 0,5 - 1,5 rpm, within a substantially larger range or interval for the flow of flushing liquid in m 3 /h, e.g. within the range from about 10 m 3 /h to at least about 55 m 3 /h.
- the pipe member 12 may eventually be dispensed with and the through-flow pipe 13 defined by the through-flow member 11 or by any other member.
- the by-pass device 33 may have a suitable number of by-pass passages 34 of suitable size and the flow control device 36 may be designed otherwise than described above.
- the flushing device may also have more than one flushing nozzle 10 and its through-flow member 11 with associated members and driving device 17 with associated members can be located in the tank 2 instead of outside the tank.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0202173A SE524722C2 (en) | 2002-07-11 | 2002-07-11 | flushing device |
SE0202173 | 2002-07-11 | ||
PCT/SE2003/001198 WO2004007274A1 (en) | 2002-07-11 | 2003-07-10 | Flushing device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1521704A1 true EP1521704A1 (en) | 2005-04-13 |
EP1521704B1 EP1521704B1 (en) | 2009-08-26 |
Family
ID=20288505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03738855A Expired - Lifetime EP1521704B1 (en) | 2002-07-11 | 2003-07-10 | Flushing device |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1521704B1 (en) |
CN (1) | CN100335364C (en) |
AT (1) | ATE440770T1 (en) |
AU (1) | AU2003246228A1 (en) |
DE (1) | DE60328991D1 (en) |
DK (1) | DK1521704T3 (en) |
SE (1) | SE524722C2 (en) |
WO (1) | WO2004007274A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK200400182U4 (en) | 2004-06-23 | 2005-10-14 | Alfa Laval Tank Equipment As | Drive unit especially for use in connection with tank cleaning equipment |
JP4734423B2 (en) * | 2005-12-30 | 2011-07-27 | アルファ ラバル タンク イクイップメント エイ/エス | Tank cleaning head drive system |
CN101948003B (en) * | 2010-09-14 | 2012-04-25 | 南京信息工程大学 | Fully automatic tank washing machine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5522571A (en) * | 1978-08-08 | 1980-02-18 | Sansui Shoji Kk | Oil tanker flushing apparatus |
DE3836053C1 (en) * | 1988-10-22 | 1990-01-11 | Alfred Kaercher Gmbh & Co, 7057 Winnenden, De | |
WO1995022415A1 (en) * | 1994-02-16 | 1995-08-24 | Hydropower Inc., Ltd. | Tank cleaning system |
CN2210726Y (en) * | 1994-12-16 | 1995-10-25 | 王克裾 | All-directional automatic-spray washing device |
DE69607046D1 (en) * | 1995-01-30 | 2000-04-20 | Jinbaeck Lars H | Flushing device |
-
2002
- 2002-07-11 SE SE0202173A patent/SE524722C2/en not_active IP Right Cessation
-
2003
- 2003-07-10 WO PCT/SE2003/001198 patent/WO2004007274A1/en not_active Application Discontinuation
- 2003-07-10 CN CNB03816437XA patent/CN100335364C/en not_active Expired - Fee Related
- 2003-07-10 AU AU2003246228A patent/AU2003246228A1/en not_active Abandoned
- 2003-07-10 DE DE60328991T patent/DE60328991D1/en not_active Expired - Lifetime
- 2003-07-10 AT AT03738855T patent/ATE440770T1/en not_active IP Right Cessation
- 2003-07-10 EP EP03738855A patent/EP1521704B1/en not_active Expired - Lifetime
- 2003-07-10 DK DK03738855T patent/DK1521704T3/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2004007274A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE0202173D0 (en) | 2002-07-11 |
SE0202173L (en) | 2004-01-12 |
CN100335364C (en) | 2007-09-05 |
CN1668502A (en) | 2005-09-14 |
SE524722C2 (en) | 2004-09-21 |
DK1521704T3 (en) | 2009-12-21 |
DE60328991D1 (en) | 2009-10-08 |
ATE440770T1 (en) | 2009-09-15 |
AU2003246228A1 (en) | 2004-02-02 |
EP1521704B1 (en) | 2009-08-26 |
WO2004007274A1 (en) | 2004-01-22 |
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