EP0169616B1 - Derrick crane for dredgecraft - Google Patents
Derrick crane for dredgecraft Download PDFInfo
- Publication number
- EP0169616B1 EP0169616B1 EP19850201196 EP85201196A EP0169616B1 EP 0169616 B1 EP0169616 B1 EP 0169616B1 EP 19850201196 EP19850201196 EP 19850201196 EP 85201196 A EP85201196 A EP 85201196A EP 0169616 B1 EP0169616 B1 EP 0169616B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crane
- derrick
- hinge
- arrangement
- operating mechanism
- 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.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B23/00—Equipment for handling lifeboats or the like
- B63B23/02—Davits, i.e. devices having arms for lowering boats by cables or the like
- B63B23/04—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type
- B63B23/06—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots
- B63B23/10—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots with positive drive of the arms
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes
Definitions
- the invention relates to a derrick-crane for a dredging vessel, which said derrick-crane is arranged to displace a movable tubular portion of a towed suction-dredging equipment between its rest position inboard and its dredging position outboard and in which the said derrick-crane is of tubular construction and closed form and is enabled to pivot to a substantially horizontal position about axes arranged parallel with the deck and under the control of at least one operating mechanism hereof, and in which the said operating mechanism is pivotally hinged between a first hinge-arrangement affixed to the derrick-crane and a second hinge-arrangement affixed to the vessel, whereas the derrick-crane in side-elevation is of mainly of "L" form and which is pivotally affixed to the deck at one end of the short leg thereof, and in which said short leg is provided with two separate and mutually parallel extremities for the second hinge-arrangement.
- a derrick-crane of this type is known from NL-B-168.291.
- the short leg of this particular derrick-crane lies on the deck in its rest position and pivots about the axis of a hinge-pin located in a position nearby to the outboard extremity thereof.
- This pivoting displacement is effected under the control of an operating mechanism incorporating at least one hydraulically-operated piston and cylinder assembly.
- an operating mechanism incorporating at least one hydraulically-operated piston and cylinder assembly.
- the object of the invention is to remove these objections and to provide a derrick-crane having a compact operating mechanism and a hydraulic system integral with the derrick-crane itself and which is completely independent of the hydraulic system, if any, of the vessel on which it is installed.
- this object is achieved by the fact that the rear and underside of the derrick-crane is provided with a slot-hole to permit passage of the said operating mechanism there through, that the said first hinge-arrangement is accommodated in the slot on the inboard side of the long leg, whereas the second hinge-arrangement is affixed in a position near the position assumed by the lower end of the long leg of the derrick-crane in its rest position, and in which the said operating mechanism in its rest position extends mainly into the said slot of the derrick-crane, and that the said extremities are arranged on supporting-limbs which forms a considerable part of the length of the short leg.
- the derrick-crane occupies a minimum of deck space both in the rest position and in the operating position so that installation on both new vessels and existing vessels with narrow passageways is possible.
- a derrick-crane which is mounted on the back of a truck and is designed for handling containers, such as railway containers, between this truck and a railway car.
- This derrick-crane comprises two parallel "L" shaped lifting arms connected by a horizontal branch and thus forming a portal or arch.
- This open portal is pivoted at each lower leg to the sides of a support frame fastened on the longitudinal chassis girders of the truck.
- the portal or arch is displaced by two parallel piston and cylinder assemblies, that are each arranged at the inside of the "L" shaped lifting arms.
- a supply-tank for the hydraulic medium together with the other parts of the hydraulic system are integrally incorporated in the derrick-crane.
- the derrick-crane according to the invention is destined for fixing to the deck 1 and surrounded by the side of the vessel 2, the hatch coaming 7 and the hold H of the dredging vessel (not shown).
- Two separate pairs of parallel arranged hinge-ears (3, 3a) and (4, 4a) bordering the edge of the vessel's side are welded to the deck and through which two substantially-horizontal and co-axial hinge-pins 5 and 5a are arranged parallel to the vessel's side 2 to which support-plates 6 and 6a are fixed.
- a second hinge-arrangement cmprising hinge-ears 8 and 8a are welded to the deck 1 against the superstructure 7 on the inboard side and through which a hinge-pin 9 is arranged and which runs parallel to the hinge-pins 5 and 5a.
- Figure 1 shows a side-levation of a derrick-crane of substantially 'L' form and having a short lower-arm generally indicated by the reference numeral 10, and a long upper-arm generally indicated by the reference numeral 13.
- Figure 2 shows that the crane arm 10, 13 is of a boxlike or tubular form and preferably constructed of plate material, and it will be seen that it tapers somewhat in the vertical direction.
- the short under-arm is provided with two diverging limbs 11, 11a, the drilled and parallel extremities 12, 12a of which extend between the pairs of ears 3, 4 and 3a, 4a respectively and pivot about the axis of the hinge-pins 5, 5a.
- the rear and underside of the derrick-crane are provided with a slot (not shown) for accommodating the operating mechanism.
- the hinge-pin 14 is fixed in the upper portion of this slot in the long leg 13 and runs parallel with hinge-pins 5, 5a.
- the operating mechanism for the derrick-crane is hinged at its upper end to pivot about the axis of hinge-pin 14, this mechanism is preferably constituted by a hydraulically-operated reciprocating piston 15 operatively arranged in a cylinder 16.
- the free lower- end 17 of the piston is coupled to the hinge-pin 9.
- the derrick-crane is shown in its operating position in the drawings and in which the piston 15 is shown in its extended position from the cylinder 16. On withdrawal of the piston 15 back into the cylinder 16, the long arm 13 is displaced at a small angle to the vertical between the side of the vessel 2 and the superstructure 7.
- the coaxially arranged hydraulic driving motor 20 and the cable-winch 21 coupled thereto are affixed to the exterior side of the derrick-crane under the short leg 10.
- the swell-compensator is affixed on the exterior of the derrick-crane under the long crane leg 10.
- This swell-compensator comprises the hydraulic cylinder 22 in which the hydraulically-operated piston 23 reciprocates.
- a number (say 2 for example) of cable-sheaves 25 are rotatably mounted on the upper side of the cylinder 22 and a set (say 2 for example) of cable-sheaves 26 are rotatably mounted on the lower end of the piston 23.
- the set of cable-sheaves can extend outward from the position defined by the dashed-line in Figure 1 to a maximum distance defined by the dashed-line 26' that is to say over a distance defined by 'L'.
- this stroke-length 'L' multiplied by 4 and with 2 upper sheaves 25 and two lower sheaves 26, the hoisting-cable 27 can be shortened or lengthened according to the vertical movement of the dredging vessel and/or the suction pipe 28 resulting from wave motion.
- a cable-sheave 29 is rotatably mounted on a hinge-pin 30 at the upper end of the long crane- leg 13 and which hinge-pin 30 is arranged parallel to the hinge-pins 5, 5a.
- a guide roller 31 is rotatably mounted on a spindle 32 which crosses the hinge-pin 30 perpendicular thereto. This spindle 32 lies substantially in a horizontal position when the derrick-crane is in the operating position shown in Figure 1.
- the guide roller 31 serves to guide the cable 27 which makes an angle a to the horizontal when in the operating position and as shown in Figure 2.
- the angle a made by the cable 27 to the horiziontal changes just as do the angles of the derrick-crane arms 10, 13 about the axes of the hinge-pins 5, 5a when the cable 27 is hoisted in and/or paid out.
- a suction-pipe cradle 33 for accomodating the suction-pipe 28 in its rest position is provided in the cavity between the short leg 10 and the long leg 13.
- the supply-tank 34 for the hydraulic medium is accommodated in the short arm 10, this supply-tank 34 forms part of the hydraulic system together with the hydraulic-pump 35 driven by the electric motor 19.
- This hydraulic system feeds the piston and cylinder assembly 15, 16, the winch-motor 20 and the piston and cylinder assembly 23, 22 of the swell-compensator. Due to this form of construction, the derrick-crane has a completely integral hydraulic system which is entirely independent of the hydraulic system of the dredging vessel on which the derrick-crane has been installed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Description
- The invention relates to a derrick-crane for a dredging vessel, which said derrick-crane is arranged to displace a movable tubular portion of a towed suction-dredging equipment between its rest position inboard and its dredging position outboard and in which the said derrick-crane is of tubular construction and closed form and is enabled to pivot to a substantially horizontal position about axes arranged parallel with the deck and under the control of at least one operating mechanism hereof, and in which the said operating mechanism is pivotally hinged between a first hinge-arrangement affixed to the derrick-crane and a second hinge-arrangement affixed to the vessel, whereas the derrick-crane in side-elevation is of mainly of "L" form and which is pivotally affixed to the deck at one end of the short leg thereof, and in which said short leg is provided with two separate and mutually parallel extremities for the second hinge-arrangement.
- A derrick-crane of this type is known from NL-B-168.291. In side-elevation the short leg of this particular derrick-crane lies on the deck in its rest position and pivots about the axis of a hinge-pin located in a position nearby to the outboard extremity thereof.
- This pivoting displacement is effected under the control of an operating mechanism incorporating at least one hydraulically-operated piston and cylinder assembly. Through this arrangement, the inboard located, or second, hinge-arrangement is positioned at a considerable distance behind the derrick-crane itself.
- Such an arrangement leads to objections hereto inasmuch that on the one hand the rearward extending operating-mechanism occupies a very considerable amount of deck space and is difficult to install on vessels having an insufficient width of passageway along the deck, and inasmuch on the other hand that access though the passageway is impeded. Furthermore, the hydraulically-operated members of the mechanism are operatively dependent on the vessel's own hydraulic system to which the mechanism would necessarily have to be connected to carry out its displacing function.
- The object of the invention is to remove these objections and to provide a derrick-crane having a compact operating mechanism and a hydraulic system integral with the derrick-crane itself and which is completely independent of the hydraulic system, if any, of the vessel on which it is installed.
- In accordance with the invention this object is achieved by the fact that the rear and underside of the derrick-crane is provided with a slot-hole to permit passage of the said operating mechanism there through, that the said first hinge-arrangement is accommodated in the slot on the inboard side of the long leg, whereas the second hinge-arrangement is affixed in a position near the position assumed by the lower end of the long leg of the derrick-crane in its rest position, and in which the said operating mechanism in its rest position extends mainly into the said slot of the derrick-crane, and that the said extremities are arranged on supporting-limbs which forms a considerable part of the length of the short leg. By the application of the invention the derrick-crane occupies a minimum of deck space both in the rest position and in the operating position so that installation on both new vessels and existing vessels with narrow passageways is possible.
- From the document FR-A-1.356.379 a derrick-crane is known which is mounted on the back of a truck and is designed for handling containers, such as railway containers, between this truck and a railway car. This derrick-crane comprises two parallel "L" shaped lifting arms connected by a horizontal branch and thus forming a portal or arch. This open portal is pivoted at each lower leg to the sides of a support frame fastened on the longitudinal chassis girders of the truck. The portal or arch is displaced by two parallel piston and cylinder assemblies, that are each arranged at the inside of the "L" shaped lifting arms. These assemblies are each pivoted at the lower end to the support frame near the bend in the lifting arm, and at the upper end to the upper leg of each "L" shaped lifting arm. In the rest position of the portal or arch the two piston and cylinder assemblies lie inside the lifting arms and require little space behind the open portal or arch. As this is only the lower part of the container derrick-crane, of which the upper part is pivoted to the upper legs of the "L" shaped lifting arms, the resemblance with the derrick-crane according to the invention intended for ship's use is therefor only superficial.
- According to a preferred embodiment of the invention a supply-tank for the hydraulic medium together with the other parts of the hydraulic system are integrally incorporated in the derrick-crane.
- The invention is now to be described further with reference to the accompanying drawings of an embodiment of the invention and in which:
- Figure 1 shows a side-elevation of the derrick-crane according to the invention and in its operating position.
- Figure 2 is a front-elevation of the derrick-crane shown in Figure 1.
- The derrick-crane according to the invention is destined for fixing to the deck 1 and surrounded by the side of the vessel 2, the hatch coaming 7 and the hold H of the dredging vessel (not shown). Two separate pairs of parallel arranged hinge-ears (3, 3a) and (4, 4a) bordering the edge of the vessel's side are welded to the deck and through which two substantially-horizontal and co-axial hinge-
pins 5 and 5a are arranged parallel to the vessel's side 2 to which support-plates 6 and 6a are fixed. A second hinge-arrangement cmprising hinge-ears 8 and 8a are welded to the deck 1 against the superstructure 7 on the inboard side and through which a hinge-pin 9 is arranged and which runs parallel to the hinge-pins 5 and 5a. - Figure 1 shows a side-levation of a derrick-crane of substantially 'L' form and having a short lower-arm generally indicated by the
reference numeral 10, and a long upper-arm generally indicated by thereference numeral 13. Figure 2 shows that thecrane arm - The short under-arm is provided with two diverging limbs 11, 11a, the drilled and
parallel extremities 12, 12a of which extend between the pairs of ears 3, 4 and 3a, 4a respectively and pivot about the axis of the hinge-pins 5, 5a. - The rear and underside of the derrick-crane are provided with a slot (not shown) for accommodating the operating mechanism.
- The hinge-
pin 14 is fixed in the upper portion of this slot in thelong leg 13 and runs parallel with hinge-pins 5, 5a. The operating mechanism for the derrick-crane is hinged at its upper end to pivot about the axis of hinge-pin 14, this mechanism is preferably constituted by a hydraulically-operated reciprocatingpiston 15 operatively arranged in acylinder 16. For the purpose of performing its function the free lower-end 17 of the piston is coupled to the hinge-pin 9. The derrick-crane is shown in its operating position in the drawings and in which thepiston 15 is shown in its extended position from thecylinder 16. On withdrawal of thepiston 15 back into thecylinder 16, thelong arm 13 is displaced at a small angle to the vertical between the side of the vessel 2 and the superstructure 7. - An
electric motor 19, for driving ahydraulic pump 35 for a hydraulic system with a hydraulic accumulator (not shown) located on the inner side of the crane arm, is arranged between the supporting limbs 11, 11a of the short tower-arm and on the exterior side thereof. - The coaxially arranged
hydraulic driving motor 20 and the cable-winch 21 coupled thereto are affixed to the exterior side of the derrick-crane under theshort leg 10. - The swell-compensator, generally indicated by the
reference numeral 24, is affixed on the exterior of the derrick-crane under thelong crane leg 10. This swell-compensator comprises thehydraulic cylinder 22 in which the hydraulically-operated piston 23 reciprocates. - A number (say 2 for example) of cable-
sheaves 25 are rotatably mounted on the upper side of thecylinder 22 and a set (say 2 for example) of cable-sheaves 26 are rotatably mounted on the lower end of the piston 23. The set of cable-sheaves can extend outward from the position defined by the dashed-line in Figure 1 to a maximum distance defined by the dashed-line 26' that is to say over a distance defined by 'L'. With this stroke-length 'L' multiplied by 4 and with 2upper sheaves 25 and twolower sheaves 26, the hoisting-cable 27 can be shortened or lengthened according to the vertical movement of the dredging vessel and/or thesuction pipe 28 resulting from wave motion. - A cable-
sheave 29 is rotatably mounted on a hinge-pin 30 at the upper end of the long crane-leg 13 and which hinge-pin 30 is arranged parallel to the hinge-pins 5, 5a. Aguide roller 31 is rotatably mounted on aspindle 32 which crosses the hinge-pin 30 perpendicular thereto. Thisspindle 32 lies substantially in a horizontal position when the derrick-crane is in the operating position shown in Figure 1. Theguide roller 31 serves to guide thecable 27 which makes an angle a to the horizontal when in the operating position and as shown in Figure 2. The angle a made by thecable 27 to the horiziontal changes just as do the angles of the derrick-crane arms pins 5, 5a when thecable 27 is hoisted in and/or paid out. - A suction-
pipe cradle 33 for accomodating the suction-pipe 28 in its rest position is provided in the cavity between theshort leg 10 and thelong leg 13. - The supply-
tank 34 for the hydraulic medium is accommodated in theshort arm 10, this supply-tank 34 forms part of the hydraulic system together with the hydraulic-pump 35 driven by theelectric motor 19. This hydraulic system feeds the piston andcylinder assembly motor 20 and the piston andcylinder assembly 23, 22 of the swell-compensator. Due to this form of construction, the derrick-crane has a completely integral hydraulic system which is entirely independent of the hydraulic system of the dredging vessel on which the derrick-crane has been installed. - Only power-supply cables for the
electric motor 19 and for the operating-valves (not shown) for the hydraulic system need be provided for the derrick-crane from a power source exterior thereto. - As shown in Figure 2, the central-plane fo the piston and
cylinder assembly electric motor 19 are coincident with the vertical symmetrical plane Z-Z of the derrick-crane so neither of these elements are a hindrance to one another whilst deck space is also saved.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8402240 | 1984-07-15 | ||
NL8402240A NL8402240A (en) | 1984-07-15 | 1984-07-15 | BUCKET CRANE FOR A DREDGING VESSEL. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0169616A1 EP0169616A1 (en) | 1986-01-29 |
EP0169616B1 true EP0169616B1 (en) | 1988-09-28 |
Family
ID=19844220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850201196 Expired EP0169616B1 (en) | 1984-07-15 | 1985-07-15 | Derrick crane for dredgecraft |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0169616B1 (en) |
DE (2) | DE8434738U1 (en) |
NL (1) | NL8402240A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105858495B (en) * | 2016-03-30 | 2017-11-24 | 亳州市爱开发网络科技有限公司 | One kind building boom hoisting |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3071254A (en) * | 1959-12-30 | 1963-01-01 | Clark Equipment Co | Tractor with boom attachment |
FR1356379A (en) * | 1963-02-13 | 1964-03-27 | Bennes Marrel | Improvements to mobile crane devices intended to equip trucks and other similar vehicles |
US3764020A (en) * | 1971-07-26 | 1973-10-09 | Logging Syst Inc | Skidder boom for tractor vehicles |
NL168291C (en) * | 1979-03-11 | 1982-03-16 | Breejen Beheer | CRANE FOR A DREDGER OF A DREDGING VESSEL. |
-
1984
- 1984-07-15 NL NL8402240A patent/NL8402240A/en not_active Application Discontinuation
- 1984-11-27 DE DE19848434738 patent/DE8434738U1/en not_active Expired
-
1985
- 1985-07-15 DE DE8585201196T patent/DE3565294D1/en not_active Expired
- 1985-07-15 EP EP19850201196 patent/EP0169616B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE8434738U1 (en) | 1985-03-14 |
EP0169616A1 (en) | 1986-01-29 |
NL8402240A (en) | 1986-02-03 |
DE3565294D1 (en) | 1988-11-03 |
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Legal Events
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