CN100387505C - Hoisting system for installing assembling and disembling high stand havey equipment - Google Patents

Hoisting system for installing assembling and disembling high stand havey equipment Download PDF

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Publication number
CN100387505C
CN100387505C CNB2005101072421A CN200510107242A CN100387505C CN 100387505 C CN100387505 C CN 100387505C CN B2005101072421 A CNB2005101072421 A CN B2005101072421A CN 200510107242 A CN200510107242 A CN 200510107242A CN 100387505 C CN100387505 C CN 100387505C
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China
Prior art keywords
luffing
boom device
bearing pin
rear pole
hoists
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Expired - Fee Related
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CNB2005101072421A
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CN1792762A (en
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张和平
张志宏
刘忠明
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Zhengzhou Research Institute of Mechanical Engineering Co Ltd
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Zhengzhou Research Institute of Mechanical Engineering Co Ltd
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Publication of CN1792762A publication Critical patent/CN1792762A/en
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Publication of CN100387505C publication Critical patent/CN100387505C/en
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Abstract

The present invention relates to a lifting system for installing assembly and disassembly type high-stand heavy equipment, which is composed of an arm frame device, a lifting device, a fixed pulley amplitude device, a hook, an electric control cabinet, an operation stand, etc., wherein the arm frame device is arranged on the top end of a tower frame; the lifting device, an amplitude fixed pulley block, the electric control cabinet and the operation stand are arranged on the ground and are connected with the foundation of the ground through anchor bolts; the arm frame device, the lifting device and the fixed pulley amplitude device make a generator and a blade impeller arranged on the high stand of the tower frame. The components can be respectively arranged on an automobile for walking in a rotary field after wind power generation equipment is installed. The present invention has the advantage of convenience.

Description

Hoisting system for installing assembling and disembling high stand havey equipment
One, technical field:
The present invention relates to a kind of weight-lifting equipment of using when heavy duty equipment is installed on high platform, be specially adapted to the Lift-on/Lift-off System of grid connected wind power equipment when installing, belong to the lifting equipment field.
Two, background technology:
When we need to weigh tens tons mechanical equipment integral installation reach up to the high platform on tens meters on distance ground on the time, be an inevitable problem how with their liftings and installation in place, usual way is to finish with wheel crane, at this moment the crane capacity of wheel crane will be much larger than the actual weight of equipment, simultaneously, because the expense that lifting is taken place also is a no small spending.For example when the direct-connected grid type wind power generating set of electrical generator and impeller is installed, only heavy 40 tons of heavy global facilities are installed on the high 80 meters pylon, just need crane capacity to reach the whipline of 20 tons of 120 tons wheel crane Liang Tai and crane capacities, about 7~80,000 yuan of lifting cost, moreover unit is installed and often is in remote area, and the transition of large-tonnage wheel crane also has many difficulties.
Three, summary of the invention:
The objective of the invention is to provides a kind of hoisting system for installing assembling and disembling high stand havey equipment for overcoming the above problems, the large-tonnage wheel crane of required usefulness when replacing high platform erecting equipment.
The present invention passes through following scheme implementation:
A kind of hoisting system for installing assembling and disembling high stand havey equipment, it comprises boom device, winding plant, luffing pulley gear, suspension hook, electrical control cubicles, several parts of operating console, it is characterized in that: boom device is installed in the pylon top by turning pair, winding plant, luffing fixed pulley, electrical control cubicles, operating console are installed on the ground, are connected with basis, ground land used foot bolt.
Boom device integral body is triangular structure, it comprises the track adjusting wheel that hoists, bearing pin, back stay, untie-sell, ship and resell on another market, fixed link, front tension bar, bearing pin, the fixed pulley group that hoists, front strut, free bearing, hinge pin, bearing pin, rear pole, luffing running block, integral installation is on the pylon top, pylon top and free bearing are fixed together, the V-shape base of boom device below is connected with the hole of free bearing by hinge pin, during luffing, whole A-frame arm rack device forms turning pair around the hinge pin rotation; Back stay one end connects with rear pole one end by bearing pin, front tension bar one end connects with front strut one end by bearing pin, the in addition two ends of back stay and front tension bar by two pairs of untie-sells, ship and resell on another market and fixed link is linked together, the rear pole other end connects with boom device bottom V-shape base by bearing pin, and the front strut other end is captiveed joint with boom device bottom V-shape base.
Winding plant, it comprises the retarder that hoists, hoist brake, lifting motor, hoisting drum, base, amplitude-changing drum, luffing motor, luffing drg, luffing retarder, each parts is installed on the base, and base is fixed on the basis, ground with holding-down bolt; Lifting motor passes hoist brake and is connected with the input shaft of speed reducer that hoists, and the output shaft of the retarder that hoists is connected with the axle of hoisting drum; The luffing motor passes the luffing drg and is connected with the luffing input shaft of speed reducer, and the output shaft of luffing retarder is connected with the axle of amplitude-changing drum.
A kind of hoisting system for installing assembling and disembling high stand havey equipment, mainly form by boom device, winding plant, luffing pulley gear, suspension hook, electrical control cubicles, several parts of operating console, wherein boom device 25 is installed in pylon 31 tops, with pylon 31 top bolt togethers, the luffing fixed pulley group 29 of winding plant 26, luffing pulley gear, electrical control cubicles 34, operating console 35 are installed on the ground, be connected with basis, ground land used foot bolt, electrical generator 32 and impeller 33 be installed in the assigned position of pylon 31 by boom device, winding plant, luffing pulley gear.
Boom device 25 integral body are triangular structure, by the track adjusting wheel 1 that hoists, bearing pin 2, back stay 3, untie-sell 4, ship and resell on another market 5, fixed link 6, front tension bar 7, bearing pin 8, the fixed pulley group 9 that hoists, front strut 10, free bearing 11, hinge pin 12, bearing pin 13, rear pole 14, luffing running block 15 form, integral installation is on pylon 31 tops, pylon 31 tops and free bearing 11 bolt togethers, dismantle free bearing 11 and pylon 31 top bonded assembly bolts, boom device 25 can integral body hang down; Dismantle two untie-sells 4 on the boom device 25, the triangle of rigidity is destroyed, and front tension bar 7 rotates to front strut 10 around bearing pin 8, and back stay 3 rotates to rear pole 14 around bearing pin 2, rear pole 14 can rotate to front strut 10 around bearing pin 13 simultaneously, and whole boom device 25 multilayer foldings together.
Winding plant 26 is made up of the retarder 16 that hoists, hoist brake 17, lifting motor 18, hoisting drum 19, base 20, amplitude-changing drum 21, luffing motor 22, luffing drg 23, luffing retarder 24, each parts is installed on the base 20, and base 20 usefulness holding-down bolts are fixed on the basis, ground; Hoist rope 28 1 ends are fixed on hoisting drum 19 1 sides, walk around the track adjusting wheel 1 that hoists, the running block on the fixed pulley group 9 that hoists and the suspension hook 27, the other end is fixed on suspension hook 27 running blocks, constitute flexible hoisting system, lifting motor 18 starts, drive hoisting drum 19 rotations by the retarder 16 that hoists, lay winding wire ropes, finish that weight hoists and the decline process, hoist brake 17 is used for fixing the position of hoisting drum 19, and hoist rope 28 adopts the mode of multiple wraps on hoisting drum 19; Luffing steel rope 30 1 ends are fixed on amplitude-changing drum 21 1 sides, walk around luffing running block 15 and ground luffing fixed pulley group 29, the other end is fixed on the luffing fixed pulley group 29, constitute flexible changing-breadth system, luffing motor 22 starts, drive amplitude-changing drum 21 rotations by luffing retarder 24, lay winding wire ropes, spurring whole boom device 25 rotates around hinge pin 12, finish the jib amplitude changing process, luffing drg 23 is used for fixing the position of amplitude-changing drum 21, and luffing steel rope 30 adopts the winding of single layer mode on amplitude-changing drum 21.
Native system adopts split type arrangement, mainly be divided into several parts, first is a boom device, jib is provided with moving, the fixed pulley group, bearing etc., this part deadweight is about 1/4th of hoisting heavy, with wheel crane it is installed in above the high platform earlier before the work, require high platform can bear the axial static load lotus of 2.7~3 times of hoisting heavy weight, second portion is a winding plant, hoisting system and changing-breadth system is set (by reel, retarder, drg, compositions such as electrical motor), be arranged on the support, this part is installed on the basis, ground, also has the luffing fixed pulley in addition, device electrical control cubicles and operating console are installed on the ground.
Fig. 1 is the boom device constructional drawing, boom device integral body is triangular structure, mainly by the track adjusting wheel 1 that hoists, bearing pin 2, back stay 3, untie-sell 4, ship and resell on another market 5, fixed link 6, front tension bar 7, bearing pin 8, the fixed pulley group 9 that hoists, front strut 10, free bearing 11, hinge pin 12, bearing pin 13, rear pole 14, luffing running block 15 form, integral installation is on the pylon top, pylon and free bearing 11 bolt togethers.
Fig. 2 is the winding plant constructional drawing, mainly form by the retarder 16 that hoists, hoist brake 17, lifting motor 18, hoisting drum 19, base 20, amplitude-changing drum 21, luffing motor 22, luffing drg 23, luffing retarder 24, each part is installed on the base 20, and base 20 usefulness holding-down bolts are fixed on the basis.
Scheme arrangement figure when Fig. 3 installs for the present invention is used for electrical generator 32 and impeller 33 direct-connected grid type wind power generating set.During work, boom device 25 is in lifting position 36, hoisting system in the winding plant 26 begins to hoist, and lifting appliance is when reaching predetermined altitude, changing-breadth system in the winding plant 26 begins luffing, equipment is adjusted to the installation site, install, during installation, automatically controlled, maneuvering system also can be carried out the fine setting of level and short transverse, guarantees the accurate of installation site.After the slinger finished, integral body was hung down boom device, and two untie-sells 4 on the boom device 25 of dismantling with boom device 25 multilayer foldings together, directly are put on the automobile and cut to.
Fig. 4 is the A-A section-drawing of Fig. 3 scheme arrangement figure, and winding plant 26, pylon 31, luffing fixed pulley group 29, electrical control cubicles 34, operating console 35 are in ground-surface deployment scenarios in the representation scheme.
Narrate more specifically in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4:
Process prescription hoists: raising line adopts steel rope, hoist rope 28 1 ends are fixed on hoisting drum 19 1 sides, walk around the track adjusting wheel 1 that hoists, the running block on the fixed pulley group 9 that hoists and the suspension hook 27, the other end is fixed on suspension hook 27 running blocks, constitutes flexible hoisting system, and lifting motor 18 starts, drive hoisting drum 19 rotations by the retarder 16 that hoists, lay winding wire ropes finishes that weight hoists and the decline process, and hoist brake 17 is used for fixing the position of hoisting drum 19.Because lifting altitude is big and the pulley multiplying power, hoist rope 28 adopts the mode of multiple wraps on hoisting drum 19.
Amplitude changing process is described: the luffing rope adopts steel rope, luffing steel rope 30 1 ends are fixed on amplitude-changing drum 21 1 sides, walk around luffing running block 15 and ground luffing fixed pulley group 29, the other end is fixed on the luffing fixed pulley group 29, constitutes flexible changing-breadth system, luffing motor 22 starts, drive amplitude-changing drum 21 rotations by luffing retarder 24, lay winding wire ropes spurs whole boom device 25 and rotates around hinge pin 12, finish the jib amplitude changing process, satisfy the requirement of equipment installation site.Luffing drg 20 is used for fixing the amplitude-changing drum position.Because the luffing stroke is shorter, the luffing steel rope adopts the winding of single layer mode on amplitude-changing drum 18.
The description that boom device is folding: two untie-sells 4 on the boom device of dismantling, destroyed by the rigid triangle that back stay 3, fixed link 6, front tension bar 7, front strut 10 and rear pole 14 are formed, front tension bar 7 rotates to front strut 10 around its bearing pin 8, back stay 3 rotates to rear pole 14 around bearing pin 2, rear pole 14 can rotate to front strut 10 around bearing pin 13 simultaneously, and then whole boom device multilayer folding together.Can directly be put on the automobile and transport.
The dress of equipment, tear description open: earlier boom device 25 usefulness wheel cranes are installed on the pylon 31 during erecting equipment, are connected with pylon 31 tops by free bearing 12 usefulness bolts.And with winding plant 26, luffing fixed pulley group 29, electrical control cubicles 34, operating console 35 installations on the ground, be connected with holding-down bolt and basis, ground.After the slinger finishes, the dismantle bonded assembly bolt on free bearing 12 and pylon 31 tops, with wheel crane boom device 25 is hung down and to put back to ground, the holding-down bolt bolt of winding plant 26, luffing fixed pulley group 29, electrical control cubicles 34 and operating console 35 is all dismantled, simultaneously, take being connected of steel rope and assembly pulley apart, steel rope is wrapped on separately the reel.At this moment, entire equipment has been divided into independently several separately parts, all can directly be put into transportation transition on the automobile.
The Lift-on/Lift-off System of being made by the present invention that is used for high platform heavy wares installation usefulness possesses following several tangible advantage:
Entire equipment is divided into independently several separately parts of boom device, winding plant, electrical control cubicles and operating console, luffing fixed pulley, suspension hook, all can directly be put into transportation transition on the automobile.
Boom device integral body is triangular structure, can be installed on the high platform, possesses supporting role when hoisting, and possesses the swing effect during luffing.Boom device possesses folding function.
The elevator partial sum luffing elevator that hoists partly is arranged on the base, is connected installation, dismounting, convenient transportation with holding-down bolt with the basis.
Four, description of drawings:
Fig. 1 is the boom device constructional drawing;
Fig. 2 is the winding plant constructional drawing;
Fig. 3 is scheme arrangement figure<Figure of abstract 〉;
Fig. 4 is the A-A section-drawing.
Among Fig. 1~Fig. 4, the 1st, track adjusting wheel hoists, the 2nd, bearing pin, the 3rd, back stay, the 4th, untie-sell, the 5th, ship and resell on another market, the 6th, fixed link, the 7th, front tension bar, the 8th, bearing pin, the 9th, the fixed pulley group hoists, the 10th, front strut, the 11st, free bearing, the 12nd, hinge pin, the 13rd, bearing pin, the 14th, rear pole, the 15th, the luffing running block, the 16th, retarder hoists, the 17th, hoist brake, the 18th, lifting motor, the 19th, hoisting drum, the 20th, base, the 21st, amplitude-changing drum, the 22nd, the luffing motor, the 23rd, the luffing drg, the 24th, the luffing retarder, the 25th, boom device, the 26th, winding plant, the 27th, suspension hook, the 28th, steel cable hoists, the 29th, luffing fixed pulley group, the 30th, the luffing steel cable, the 31st, pylon, the 32nd, electrical generator, the 33rd, the impeller installation site, the 34th, electrical control cubicles, the 35th, operating console, the 36th, the lifting position.
Five, the specific embodiment:
A kind of hoisting system for installing assembling and disembling high stand havey equipment, mainly form by boom device, winding plant, luffing pulley gear, suspension hook, electrical control cubicles, several parts of operating console, wherein boom device 25 is installed in pylon 31 tops, with pylon 31 top bolt togethers, the luffing fixed pulley group 29 of winding plant 26, luffing pulley gear, electrical control cubicles 34, operating console 35 are installed on the ground, be connected with basis, ground land used foot bolt, electrical generator 32 and impeller 33 be installed in the assigned position of pylon 31 by boom device, winding plant, luffing pulley gear.
Boom device 25 integral body are triangular structure, by the track adjusting wheel 1 that hoists, bearing pin 2, back stay 3, untie-sell 4, ship and resell on another market 5, fixed link 6, front tension bar 7, bearing pin 8, the fixed pulley group 9 that hoists, front strut 10, free bearing 11, hinge pin 12, bearing pin 13, rear pole 14, luffing running block 15 form, integral installation is on pylon 31 tops, pylon 31 tops and free bearing 11 bolt togethers, dismantle free bearing 11 and pylon 31 top bonded assembly bolts, boom device 25 can integral body hang down; Dismantle two untie-sells 4 on the boom device 25, the triangle of rigidity is destroyed, and front tension bar 7 rotates to front strut 10 around bearing pin 8, and back stay 3 rotates to rear pole 14 around bearing pin 2, rear pole 14 can rotate to front strut 10 around bearing pin 13 simultaneously, and whole boom device multilayer folding together.
Winding plant 26 is made up of the retarder 16 that hoists, hoist brake 17, lifting motor 18, hoisting drum 19, base 20, amplitude-changing drum 21, luffing motor 22, luffing drg 23, luffing retarder 24, each parts is installed on the base 20, and base 20 usefulness holding-down bolts are fixed on the basis, ground; Hoist rope 28 1 ends are fixed on hoisting drum 19 1 sides, walk around the track adjusting wheel 1 that hoists, the running block on the fixed pulley group 9 that hoists and the suspension hook 27, the other end is fixed on suspension hook 27 running blocks, constitute flexible hoisting system, lifting motor 18 starts, drive hoisting drum 19 rotations by the retarder 16 that hoists, lay winding wire ropes, finish that weight hoists and the decline process, hoist brake 17 is used for fixing the position of hoisting drum 19, and hoist rope 28 adopts the mode of multiple wraps on hoisting drum 19; Luffing steel rope 30 1 ends are fixed on amplitude-changing drum 21 1 sides, walk around luffing running block 15 and ground luffing fixed pulley group 29, the other end is fixed on the luffing fixed pulley group 29, constitute flexible changing-breadth system, luffing motor 22 starts, drive amplitude-changing drum 21 rotations by luffing retarder 24, lay winding wire ropes, spurring whole boom device 25 rotates around hinge pin 12, finish the jib amplitude changing process, luffing drg 23 is used for fixing the position of amplitude-changing drum 21, and luffing steel rope 30 adopts the winding of single layer mode on amplitude-changing drum 21.Hoist elevator and luffing elevator is placed on the base 20, and base 20 is connected with basis, ground land used foot bolt.
Narrate more specifically in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4:
Process prescription hoists: raising line adopts steel rope, hoist rope 28 1 ends are fixed on hoisting drum 19 1 sides, walk around the track adjusting wheel 1 that hoists, the running block on the fixed pulley group 9 that hoists and the suspension hook 27, the other end is fixed on suspension hook 27 running blocks, constitutes flexible hoisting system, and lifting motor 18 starts, drive hoisting drum 19 rotations by the retarder 16 that hoists, lay winding wire ropes finishes that weight hoists and the decline process, and hoist brake 17 is used for fixing the position of hoisting drum 19.Because lifting altitude is big and the pulley multiplying power, hoist rope 28 adopts the mode of multiple wraps on hoisting drum 19.
Amplitude changing process is described: the luffing rope adopts steel rope, luffing steel rope 30 1 ends are fixed on amplitude-changing drum 21 1 sides, walk around luffing running block 15 and ground luffing fixed pulley group 29, the other end is fixed on the luffing fixed pulley group 29, constitutes flexible changing-breadth system, luffing motor 22 starts, drive amplitude-changing drum 21 rotations by luffing retarder 24, lay winding wire ropes spurs whole boom device 25 and rotates around hinge pin 12, finish the jib amplitude changing process, satisfy the requirement of equipment installation site.Luffing drg 20 is used for fixing the amplitude-changing drum position.Because the luffing stroke is shorter, the luffing steel rope adopts the winding of single layer mode on amplitude-changing drum 18.
The description that boom device is folding: two untie-sells 4 on the boom device of dismantling, destroyed by the rigid triangle that back stay 3, fixed link 6, front tension bar 7, front strut 10 and rear pole 14 are formed, front tension bar 7 rotates to front strut 10 around its bearing pin 8, back stay 3 rotates to rear pole 14 around bearing pin 2, rear pole 14 can rotate to front strut 10 around bearing pin 13 simultaneously, and then whole boom device multilayer folding together.Can directly be put on the automobile and transport.
The dress of equipment, tear description open: earlier boom device 25 usefulness wheel cranes are installed on the pylon 31 during erecting equipment, are connected with pylon 31 tops by free bearing 12 usefulness bolts.And with winding plant 26, luffing fixed pulley group 29, electrical control cubicles 34, operating console 35 installations on the ground, be connected with holding-down bolt and basis, ground.After the slinger finishes, the dismantle bonded assembly bolt on free bearing 12 and pylon 31 tops, with wheel crane boom device 25 is hung down and to put back to ground, the holding-down bolt bolt of winding plant 26, luffing fixed pulley group 29, electrical control cubicles 34 and operating console 35 is all dismantled, simultaneously, take being connected of steel rope and assembly pulley apart, steel rope is wrapped on separately the reel.At this moment, entire equipment has been divided into independently several separately parts, all can directly be put into transportation transition on the automobile.

Claims (2)

1. hoisting system for installing assembling and disembling high stand havey equipment, it is by boom device, winding plant, the luffing pulley gear, suspension hook, electrical control cubicles, several parts of operating console are formed, it is characterized in that: boom device (25) is installed in pylon (31) top by turning pair, boom device (25) integral body is triangular structure, it comprises the track adjusting wheel that hoists (1), bearing pin (2), back stay (3), untie-sell (4), ship and resell on another market (5), fixed link (6), front tension bar (7), bearing pin (8), the fixed pulley group that hoists (9), front strut (10), free bearing (11), hinge pin (12), bearing pin (13), rear pole (14), luffing running block (15), integral installation is on pylon (31) top, pylon (31) top and free bearing (11) are fixed together, the V-shape base of boom device (25) below is connected with the hole of free bearing (11) by hinge pin (12), during luffing, whole A-frame arm rack device (25) forms turning pair around hinge pin (12) rotation; Back stay (3) one ends connect with rear pole (14) one ends by bearing pin (2), front tension bar (7) one ends connect with front strut (10) one ends by bearing pin (8), the in addition two ends of back stay (3) and front tension bar (7) by two pairs of untie-sells (4), ship and resell on another market (5) and fixed link (6) is linked together, rear pole (14) other end connects with boom device (25) bottom V-shape base by bearing pin (13), and front strut (10) other end is captiveed joint with boom device (25) bottom V-shape base.
2. hoisting system for installing assembling and disembling high stand havey equipment according to claim 1, it is characterized in that: two untie-sells (4) on the boom device of dismantling (25), by back stay (3), fixed link (6), front tension bar (7), the rigid triangle that front strut (10) and rear pole (14) are formed is destroyed, front tension bar (7) rotates to front strut (10) around its bearing pin (8), back stay (3) rotates to rear pole (14) around bearing pin (2), simultaneously rear pole (14) can rotate to front strut (10) around bearing pin (13), so whole boom device (25) but multilayer folding together.
CNB2005101072421A 2005-12-05 2005-12-05 Hoisting system for installing assembling and disembling high stand havey equipment Expired - Fee Related CN100387505C (en)

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Application Number Priority Date Filing Date Title
CNB2005101072421A CN100387505C (en) 2005-12-05 2005-12-05 Hoisting system for installing assembling and disembling high stand havey equipment

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CN100387505C true CN100387505C (en) 2008-05-14

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111550061A (en) * 2020-05-19 2020-08-18 中国建筑第八工程局有限公司 Herringbone frame in hinged support form for hoisting steel beam of winch and method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390206A (en) * 1971-03-15 1975-04-09 Potain Sa Tower crane with telescopic jib
GB1502704A (en) * 1975-04-26 1978-03-01 Salzgitter Maschinen Ag Hauling arrangement
CN2057659U (en) * 1989-09-01 1990-05-30 鞍山钢铁公司 Automati elevator of tower crane driver's cab
CN2154250Y (en) * 1992-06-07 1994-01-26 印丹怡 Mini-tower hoist
WO1998009908A1 (en) * 1996-09-05 1998-03-12 Ronwon Pty Limited A crane
CN2488892Y (en) * 2001-07-12 2002-05-01 孙在鲁 Small cart with self loading tower type machine of varying size in revolving down style
CN2507832Y (en) * 2001-10-27 2002-08-28 邹正山 Tower Lifter
CN1448331A (en) * 2002-03-29 2003-10-15 上海振华港口机械(集团)股份有限公司 Differential compensating gantry crane

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390206A (en) * 1971-03-15 1975-04-09 Potain Sa Tower crane with telescopic jib
GB1502704A (en) * 1975-04-26 1978-03-01 Salzgitter Maschinen Ag Hauling arrangement
CN2057659U (en) * 1989-09-01 1990-05-30 鞍山钢铁公司 Automati elevator of tower crane driver's cab
CN2154250Y (en) * 1992-06-07 1994-01-26 印丹怡 Mini-tower hoist
WO1998009908A1 (en) * 1996-09-05 1998-03-12 Ronwon Pty Limited A crane
CN2488892Y (en) * 2001-07-12 2002-05-01 孙在鲁 Small cart with self loading tower type machine of varying size in revolving down style
CN2507832Y (en) * 2001-10-27 2002-08-28 邹正山 Tower Lifter
CN1448331A (en) * 2002-03-29 2003-10-15 上海振华港口机械(集团)股份有限公司 Differential compensating gantry crane

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