NL2009668C2 - Revolver crane. - Google Patents

Revolver crane. Download PDF

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Publication number
NL2009668C2
NL2009668C2 NL2009668A NL2009668A NL2009668C2 NL 2009668 C2 NL2009668 C2 NL 2009668C2 NL 2009668 A NL2009668 A NL 2009668A NL 2009668 A NL2009668 A NL 2009668A NL 2009668 C2 NL2009668 C2 NL 2009668C2
Authority
NL
Netherlands
Prior art keywords
ring
support base
foot
platform
ballast
Prior art date
Application number
NL2009668A
Other languages
Dutch (nl)
Inventor
Jan Zwagerman
Original Assignee
Spacelift B V
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Spacelift B V filed Critical Spacelift B V
Priority to NL2009668A priority Critical patent/NL2009668C2/en
Priority to PCT/NL2013/050680 priority patent/WO2014062052A1/en
Application granted granted Critical
Publication of NL2009668C2 publication Critical patent/NL2009668C2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

Revolver crane (1), comprising a movable or immovable pedestal (2) mounted or mountable on a supporting base (3) for fixing it on said supporting base (3), wherein the pedestal (2) supports a platform ring (4) that is rotatably mounted on the pedestal (2), and on which platform ring (4) hoisting elements (5-8) for a load are provided as well as ballast (13) for balancing the load, wherein the crane (1) is provided with controllable force exerting means (9) to selectively apply forces between the platform ring (4) and the pedestal (2) when the pedestal (2) is fixed on the supporting base (3) for assisting or counteracting the load balancing forces of the ballast (13) depending on the duty of the hoisting elements (5- 8).

Description

Revolver crane
The invention relates to a revolver crane, comprising a movable or immovable pedestal mounted or mountable on 5 a supporting base for fixing it on said supporting base, wherein the pedestal supports a platform ring that is rotatably mounted on the pedestal, and on which platform ring hoisting elements for a load are provided as well as ballast for balancing the load.
10 Such a revolver crane is known from US-A-4,579,234, which concerns a heavy-duty revolver crane. The invention is however also applicable to revolver cranes which are not particularly intended for heavy-duty purposes. Further, the invention applies to cranes that are immovably fixed to the 15 supporting base, but also to cranes which are movable and wherein the pedestal of the crane is mounted to the supporting base prior to the crane being placed in operation.
In order to be able to lift heavy loads, the construction of the known revolver crane must likewise be heavy, 20 and the dimensions of particularly the platform ring must answer to certain minimum requirements resulting in a quite bulky construction of the known revolver crane. Also the weight of the ballast that is applied must be relatively high to enable sufficient outreach of the hoisting elements for 25 the design capacity of the crane. In fact when the hoisting elements are idle, the weight of the ballast induces such a high load of the platform ring on the ring construction that is applied for the rotatable mounting of the platform ring on the pedestal, that wear and tear of this ring construction is 30 high.
It is an object of the invention to provide a design of a revolver crane for all load categories, which is provided with a higher loadbearing capacity than a known revolver crane of comparable dimensions and weights. Alternatively it 35 is an object of the invention to provide a design of a revolver crane having comparable capacity as the known revolver crane, however with smaller dimensions and weights.
2
It is a further object of the invention to provide a design of a revolver crane being less prone to wear and tear.
In order to promote the above mentioned objects and to attain further advantages that may become apparent from 5 the following disclosure, the revolver crane of the invention is provided with means to selectively apply forces between the platform ring and the pedestal when the pedestal is fixed on the supporting base for assisting or counteracting the load balancing forces of the ballast depending on the duty of 10 the hoisting elements.
The just mentioned features of the revolver crane of the invention enable that said forces between the platform ring and the pedestal can be continuously attuned to the needs that may surface during the operation of the crane so 15 as to relax the loads and reduce wear and tear that applies to the platform ring on which the crane rotates. For this purpose it is beneficial that the said means to selectively apply forces between the platform ring and the pedestal when it is fixed to the supporting base, are arranged to apply 20 forces to the platform ring that pull said platform ring towards the pedestal mounted on the supporting base at the side of the ring where the ballast is located at the time that the hoisting elements are hoisting a load so as to provide additional counterweight to the ballast for balancing the load.
25 In this way the ballast may be designed smaller than in the prior art. It is also possible to construe the platform ring with a smaller diameter which positively impacts of course the overall dimensions of the revolver crane of the invention in a way that it can be designed smaller.
30 The objects of the invention are further promoted by arranging that the said means to selectively apply forces between the platform ring and the pedestal when it is fixed to the supporting base are arranged to apply forces to the platform ring pushing said platform ring away from the pede-35 stal and the supporting base at the side of the ring where the ballast is located when the hoisting elements are unloaded so as to provide counterweight to the ballast. This contributes to the realization of the above mentioned objecti 3 ves, and is particularly useful to deter wear and tear of the ring construction connecting the platform ring to the pedestal which otherwise would suffer from the ballast weight, also when the hoisting elements are unloaded.
5 It is feasible to construe the means to selectively apply forces between the platform ring and the pedestal and/or the supporting base in several ways. Suitably however a hydraulic cylinder or cylinders are mounted between and connected on a first end to the platform ring and on an oppo-10 site end to the pedestal and/or the supporting base. This is a convenient way for embodying the said means to apply the required forces to the platform ring.
Preferably the hydraulic cylinder or cylinders are on said opposite end connected with a bogey or bogeys that 15 are movable on the pedestal and/or the supporting base. This enables that the revolver crane can rotate to any intended position without compromising the possibility to apply additional forces to the platform ring. It is then possible that the hydraulic cylinder or cylinders are fixed at the bottom 20 of the platform ring below and in the vicinity of the ballast .
Suitably the bogey or bogeys are movable along a rail that is mounted on the pedestal and/or the supporting base .
25 Preferably the rail is mounted on the supporting ba se and Is at least in part removable in order to give way to the revolver crane moving on the supporting base to a position encircled by the rail where it is to be fixed to the supporting base.
30 The invention will hereinafter be elucidated with reference to the drawing of an exemplary embodiment of a revolver crane according to the invention.
In the drawing: -figure 1 shows a side view of the revolver crane of 35 the invention; and -figure 2 shows a detailed view of a preferred embodiment of the means to apply forces between the platform ring and the pedestal of the revolver crane shown in figure 1.
4
Whenever in the figures the same reference numerals are applied, these numerals refer to the same parts.
Figure 1 shows the revolver crane 1 of the invention in a side view. The crane 1 comprises a pedestal 2 mounted or 5 mountable on a supporting base 3. The pedestal 2 supports a platform ring 4 that is rotatably mounted on the pedestal 2, and said platform ring 4 is provided with hoisting elements 5-8 for a load as well as ballast 13 for balancing such a load.
10 The invention is concerned with the aspect that the crane 1 is further provided with means 9 to selectively apply forces between the platform ring 4 and the pedestal 2 and/or the supporting base 3 for assisting or counteracting the load balancing forces of the ballast 13 depending on the duty of 15 the hoisting elements 5-8.
The said means 9 to selectively apply forces between the platform ring 4 on the one hand, and on the other hand the pedestal 2 and/or the supporting base 3 are arranged to apply forces to the platform ring 4 pulling said platform 20 ring 4 towards the pedestal 2 at the side of the ring 4 where the ballast 13 is located when the pedestal 2 is fixed to the supporting base 3. This applies when the hoisting elements 5-8 are hoisting a load and provides additional counterweight to the ballast 13 for balancing the load.
25 Further the said means 9 to selectively apply forces between the platform ring 4 and the pedestal 2 when it is fixed to the supporting base 3 are arranged to apply forces to the platform ring 4 pushing said platform ring 4 away from the pedestal 2 and the supporting base 3 at the side of the 30 ring where the ballast 13 is located when the hoisting elements 5-8 are unloaded so as to provide at that time counterweight to the ballast 13.
A favorable construction of the means 9 that provide the required forces between the platform ring 4 and the pede-35 stal 2 and/or the supporting base 3 is shown more clearly in figure 2. Said means 9 are embodied with a hydraulic cylinder or cylinders 10 that are mounted between and connected on a first end 10' to the platform ring 4 and on an opposite end 5 10'' (directly or indirectly) to the pedestal 2 and/or the supporting base 3.
Figure 2 further shows that the hydraulic cylinder or cylinders 10 are on said opposite end 10connected with 5 a bogey or bogeys 11 that are movable on the supporting base 3. It is also possible to arrange for movability of the bogeys 11 on the pedestal 2. This is not shown in the figures but the manner in which this can be arranged is clear to the skilled person and requires no further elucidation with refe-10 rence to a drawing.
As figure 2 shows the bogey or bogeys 11 are movable on the supporting base 3 through the application of a rail 12 that is mounted on the supporting base 3 and along which the bogeys 11 can ride. This construction enables that the hy-15 draulic cylinder or cylinders 10 can be fixedly mounted to the bottom of the platform ring 4. In this embodiment it is also feasible and advantageous that the rail 12 is at least in part removable in order to give way to the revolver crane 1 moving on the supporting base 3 to a position encircled by 20 the rail 12 where it is to be fixed to the supporting base 3.
This demonstrates that the invention also applies to movable revolver cranes, as it also does apply to revolver cranes that are fixed to a supporting base. The (not shown) removable part of the rail 12 can be simply handled by the revolver 25 crane 1 prior to its moving to its eventual position encir cled by the rail 12. After it has reached its position encircled by the rail 12, the removable part of the rail can also simply be placed back into position by the revolver crane 1.

Claims (8)

1. Ringkraan (1), omvattende een beweegbare of onbeweegbare voet (2) gemonteerd of monteerbaar op een steunbasis (3) voor het plaatsen van de voet op genoemde steunbasis (3), waarin de voet (2) een platformring (4) steunt die roteerbaar 5 gemonteerd is op de voet (2), en op welke platformring (4) hijselementen (5-8) voor een belasting zijn voorzien alsook ballast (13) voor het balanceren van de last, met het kenmerk, dat de kraan (1) voorzien is van middelen (9) voor het selectief toepassen van krachten tussen de platformring (4) 10 en de voet (2) wanneer de voet (2) geplaatst is op de steunbasis (3) voor het ondersteunen of tegengaan van de belasting balancerende krachten van de ballast (13) afhankelijk van het vermogen van de hijselementen (5-8).A ring crane (1) comprising a movable or immobile foot (2) mounted or mountable on a support base (3) for placing the foot on said support base (3), wherein the foot (2) supports a platform ring (4) which is rotatably mounted on the foot (2), and on which platform ring (4) hoisting elements (5-8) are provided for a load as well as ballast (13) for balancing the load, characterized in that the crane ( 1) is provided with means (9) for selectively applying forces between the platform ring (4) and the foot (2) when the foot (2) is placed on the support base (3) for supporting or counteracting the load balancing forces of the ballast (13) depending on the capacity of the hoisting elements (5-8). 2. Ringkraan volgens conclusie 1, met het kenmerk, 15 dat de genoemde middelen (9) voor het selectief toepassen van krachten tussen de platformring (4) en de voet (2) wanneer deze geplaatst is op de steunbasis (3) ingericht zijn om krachten toe te passen op de platformring (4) die genoemde platformring in de richting van de voet (2) en de steunbasis 20 (3) trekt aan de zijde van de ring (4) waar de ballast (13) is voorzien wanneer de hijselementen (5-8) de belasting hijsen teneinde te voorzien in een additioneel contragewicht voor de ballast (13) voor het balanceren van de last.Ring ring according to claim 1, characterized in that said means (9) for selectively applying forces between the platform ring (4) and the foot (2) when placed on the support base (3) are arranged to apply forces to the platform ring (4) which pulls said platform ring in the direction of the foot (2) and the support base (3) on the side of the ring (4) where the ballast (13) is provided when the hoisting elements (5-8) hoist the load to provide an additional counterweight for the ballast (13) for balancing the load. 3. Ringkraan volgens conclusie 1 of 2, met het ken-25 merk, dat de genoemde middelen (9) voor het selectief toepassen van krachten tussen de platformring (4) en de voet (2) wanneer deze geplaatst is op de steunbasis (3) ingericht zijn om krachten op de platformring (4) uit te oefenen die genoemde platformring (4) wegdrukken van de voet (2) en de steunba- 30 sis (3) aan de zijde van de ring (4) waar de ballast (13) is voorzien, wanneer de hijselementen (5-8) onbelast zijn om te voorzien in een contragewicht voor de ballast (13).3. Ring crane according to claim 1 or 2, characterized in that said means (9) for selectively applying forces between the platform ring (4) and the foot (2) when placed on the support base (3) ) are adapted to exert forces on the platform ring (4) that push said platform ring (4) away from the foot (2) and the support base (3) on the side of the ring (4) where the ballast (13) ) is provided when the hoisting elements (5-8) are unloaded to provide a counterweight for the counterweight (13). 4. Ringkraan volgens één der voorgaande conclusies, met het kenmerk, dat een hydraulische cilinder of cilinders 35 (10) gemonteerd zijn tussen en verbonden met een eerste uit einde (10') van de platformring (4) en aan een tegenoverge steld uiteinde (10'') met de voet (2) en/of de steunbasis (3) .Ring crane according to one of the preceding claims, characterized in that a hydraulic cylinder or cylinders (10) are mounted between and connected to a first end (10 ') of the platform ring (4) and at an opposite end ( 10 '') with the foot (2) and / or the support base (3). 5. Ringkraan volgens conclusie 4, met het kenmerk, dat de hydraulische cilinder of cilinders (10) aan genoemd 5 tegenovergestelde uiteinde (10'') verbonden zijn met een railwagen of railwagens (11) die beweegbaar zijn op de voet (2) en/of de steunbasis (3) .Ring-valve according to claim 4, characterized in that the hydraulic cylinder or cylinders (10) at said opposite end (10 '') are connected to a rail carriage or rail carriages (11) which are movable on the foot (2) and / or the support base (3). 6. Ringkraan volgens conclusie 5, met het kenmerk, dat de railwagen of railwagens (11) beweegbaar zijn langs een 10 rail (12) die gemonteerd is op de voet (2) en/of de steunbasis (3) .Ring ring according to claim 5, characterized in that the rail carriage or rail carriages (11) are movable along a rail (12) mounted on the base (2) and / or the support base (3). 7. Ringkraan volgens conclusie 6, met het kenmerk, dat de rail (12) gemonteerd is op de steunbasis (3) en ten minste ten dele verwijderbaar is teneinde ruimte te bieden 15 aan de ringkraan (1) die beweegt op de steunbasis (3) naar een positie die omgeven is door de rail (12) alwaar deze vastgemaakt kan worden aan de steunbasis (3).7. Ring valve according to claim 6, characterized in that the rail (12) is mounted on the support base (3) and is at least partially removable in order to provide space for the ring valve (1) moving on the support base (3) ) to a position surrounded by the rail (12) where it can be attached to the support base (3). 8. Ringkraan volgens één der voorgaande conclusies 4-7, met het kenmerk, dat de hydraulische cilinder of cilin- 20 ders (10) vastgemaakt zijn aan de bodem van de platformring (4) onder en in de omgeving van de ballast (13) .8. A ring crane according to any one of the preceding claims 4-7, characterized in that the hydraulic cylinder or cylinders (10) are fixed to the bottom of the platform ring (4) below and in the vicinity of the ballast (13) .
NL2009668A 2012-10-19 2012-10-19 Revolver crane. NL2009668C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2009668A NL2009668C2 (en) 2012-10-19 2012-10-19 Revolver crane.
PCT/NL2013/050680 WO2014062052A1 (en) 2012-10-19 2013-09-23 Revolver crane

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2009668A NL2009668C2 (en) 2012-10-19 2012-10-19 Revolver crane.
NL2009668 2012-10-19

Publications (1)

Publication Number Publication Date
NL2009668C2 true NL2009668C2 (en) 2014-04-23

Family

ID=47146614

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2009668A NL2009668C2 (en) 2012-10-19 2012-10-19 Revolver crane.

Country Status (2)

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NL (1) NL2009668C2 (en)
WO (1) WO2014062052A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1135807A (en) * 1955-08-08 1957-05-03 Training in lifting devices
US4103783A (en) * 1977-05-31 1978-08-01 The Manitowoc Company, Inc. Platform crane with counterweight and boom carrier support linkages
US4275902A (en) * 1979-08-24 1981-06-30 Teja Mohindar S Crane or excavator with auxiliary mechanism for transferring superstructure loads to the ground
EP0856486A2 (en) * 1997-01-29 1998-08-05 Manitowoc Crane Group, Inc. Counterweight handling system for ring supported cranes
WO1999058769A1 (en) * 1998-05-11 1999-11-18 Spacelift Offshore B.V. Tilting jack offshore platform

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4579234A (en) 1984-03-16 1986-04-01 American Hoist & Derrick Company Self-erecting mobile crane

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1135807A (en) * 1955-08-08 1957-05-03 Training in lifting devices
US4103783A (en) * 1977-05-31 1978-08-01 The Manitowoc Company, Inc. Platform crane with counterweight and boom carrier support linkages
US4275902A (en) * 1979-08-24 1981-06-30 Teja Mohindar S Crane or excavator with auxiliary mechanism for transferring superstructure loads to the ground
EP0856486A2 (en) * 1997-01-29 1998-08-05 Manitowoc Crane Group, Inc. Counterweight handling system for ring supported cranes
WO1999058769A1 (en) * 1998-05-11 1999-11-18 Spacelift Offshore B.V. Tilting jack offshore platform

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Effective date: 20171101