Audited Supplier
PT7528-20T
24 Hours
1 Year
CE, ISO9001, ISO9001: 2000
New
>250m
>10t
Jack-Up
Fixed
Top-Slewing Crane
75m
20t
Mingwei
PT7528-20t
2.5X2.5X6m
Hydraulic
Wire Rope
Construction Usage
Mingwei
Nude in 40hq Container
CE
China
8426200
Product Description
New Type Topless flattop Tower Crane PT7528-20t
1). Reduce requirements of lifting equipment when install and dismantle tower cranes. Because there's no tower head, its unit quality is small, installing height is low, max. Installing height is lower 10m than same loading topkit tower crane. For topkit tower cranes, when assemble hoisting jibs, have to joint all jib frames, pulling rods and other accessories on the ground, then will be lifted compeletely, so that will need large capacity lifting equipment. Because connection of jib tip hinge pins, then can lift hoisting jib to connect pulling rod, easy to cause accidents. However, flat top tower cranes won't have such condition. Hoisting jibs of flat top tower cranes are 4m, 5m or 10m per section, take 50m jib as an example, its unit quality is 1/5 of whole jib, can be installed and dismantle in the air, that reduce requirements of lifting equipment when install and dismantle, can save freight of installing and dismantling, safer and quicker.
2) Suitable for tower cranes group cross operation on the same construction site. Because no tower head, cross height can be reduced to 3m when two tower cranes cross operation, topkit tower cranes needs 10m at least. Less time of installing, lower capacity requirement of lifting equipment, less ballastings, smaller tower body and chassis.
3). Suitable for special work sites. Because no tower head, efficent height of hook and space utilization is improved, so are suitable for special work sites, for example, building of airport, tunnel, workshop and work under high voltage, topkit tower cranes can't do that as flat top tower cranes.
2. Technical parameter
3. Parameters of four mechansims
3.1 Technical parameter of hoisting mechanism
3.2 Technical parameter of trolleying mechanism
3.3 Technical parameter of slewing mechanism
3.4 Technical parameter of jacking mechanism
1). Reduce requirements of lifting equipment when install and dismantle tower cranes. Because there's no tower head, its unit quality is small, installing height is low, max. Installing height is lower 10m than same loading topkit tower crane. For topkit tower cranes, when assemble hoisting jibs, have to joint all jib frames, pulling rods and other accessories on the ground, then will be lifted compeletely, so that will need large capacity lifting equipment. Because connection of jib tip hinge pins, then can lift hoisting jib to connect pulling rod, easy to cause accidents. However, flat top tower cranes won't have such condition. Hoisting jibs of flat top tower cranes are 4m, 5m or 10m per section, take 50m jib as an example, its unit quality is 1/5 of whole jib, can be installed and dismantle in the air, that reduce requirements of lifting equipment when install and dismantle, can save freight of installing and dismantling, safer and quicker.
2) Suitable for tower cranes group cross operation on the same construction site. Because no tower head, cross height can be reduced to 3m when two tower cranes cross operation, topkit tower cranes needs 10m at least. Less time of installing, lower capacity requirement of lifting equipment, less ballastings, smaller tower body and chassis.
3). Suitable for special work sites. Because no tower head, efficent height of hook and space utilization is improved, so are suitable for special work sites, for example, building of airport, tunnel, workshop and work under high voltage, topkit tower cranes can't do that as flat top tower cranes.
| R | Falls | R(max)m | C(max)Kg | 34 | 40 | 44 | 50 | 54 | 60 | 64 | 70 | 75 |
| 75 | 4 | 15.61 | 20000 | 7751 | 6253 | 5397 | 4572 | 4077 | 3460 | 3114 | 2670 | 2300 |
| 2 | 28.9 | 10000 | 8251 | 6753 | 5897 | 5072 | 4577 | 3960 | 3614 | 3170 | 2800 | |
| 70 | 4 | 15.98 | 20000 | 7932 | 6407 | 5626 | 4694 | 4190 | 3561 | 3209 | 2757 | |
| 2 | 29.49 | 10000 | 8432 | 6907 | 6126 | 5194 | 4690 | 4061 | 3709 | 3257 | ||
| 60 | 4 | 16.4 | 20000 | 8116 | 6562 | 5767 | 4818 | 4304 | 3664 | |||
| 2 | 30.02 | 10000 | 8616 | 7062 | 6267 | 5318 | 4804 | 4164 | ||||
| 50 | 4 | 16.8 | 20000 | 8304 | 6722 | 5912 | 4945 | |||||
| 2 | 30.5 | 10000 | 8804 | 7222 | 6412 | 5445 | ||||||
2. Technical parameter
| Mechanism working grade | Hoisting mechanism | M5 | ||||||
| Slewing mechanism | M4 | |||||||
| Trolleying mechanism | M4 | |||||||
| Radius (m) | Min. 3.5 | Max. 75 | ||||||
| Height (m) | Freestanding | Attaching | ||||||
| 62 | 200 | |||||||
| Max. load (t) | 18 | |||||||
| Hoisting mechanism | Hoisting speed | Falls | 2 | 4 | ||||
| Speed (m/min) | 0~70 | 0~35 | 0~20 | 0~35 | 0~20 | 0~10 | ||
| Load (t) | 2.5 | 5 | 10 | 5 | 10 | 20 | ||
| Min. descending speed (m/min) | ≤2.16 | |||||||
| Power (Kw) | 75 | |||||||
| Trolleying mechanism | Speed (m/min) | 0~60 | ||||||
| Power (Kw) | 7.5 | |||||||
| Slewing mechanism | Speed (r/min) | 0--0.8 | ||||||
| Power (Kw) | ||||||||
| Jacking mechanism | Speed (m/min) | 0.35 | ||||||
| Power (Kw) | 11 | |||||||
| Work pressure (Mpa) | 28 | |||||||
| Balanced weight | Max. working radius (m) | 75 | 70 | 60 | 50 | |||
| Weight (t) | 27.6 | 24.9 | 22.2 | 18.4 | ||||
| Total power (Kw) | 109(including jacking mechanism) | |||||||
| Working temperature ºC | -20~+40 | |||||||
3. Parameters of four mechansims
3.1 Technical parameter of hoisting mechanism
| Hoisting mechanism | ||||
| Max. pulling force | N | 45000 | ||
| Steel wire rope | Specification | 35Wx7-22-1960-1 | ||
| Max. line velocity | m/min | 82 | ||
| Drum | Dia. | m | 0.78 | |
| Drum capacity | m | 500(the twisting layer≤5) | ||
| Motor | Model | YZPF280S-4-75KW | ||
| Power | kW | 75 | ||
| Rotating speed | r/min | |||
| Brake | Model | |||
| Braking moment | N.m | |||
3.2 Technical parameter of trolleying mechanism
| Trolleying mechanism | Item | Unit | Parameter | |||||
| Max.pulling force | N | 9000 | ||||||
| Steel wire rope | Specification | 6X19-11 -1770- I | ||||||
| Max. line velocity | m/min | 60 | ||||||
| Jib length | 75m jib | m | Steelwire ropeI | 150 | Steelwire ropeII | 95 | ||
| 70m jib | m | 140 | 90 | |||||
| 60m jib | m | 120 | 80 | |||||
| 50m jib | m | 100 | 70 | |||||
| Drum rotating speed | r/min | |||||||
| Motor | Model | YPBE160M-4-11KW-B5 | ||||||
| Power | kW | 7.5 | ||||||
| Rotating speed | r/min | |||||||
| Reducer ratio | ||||||||
| Braking moment | N. m | |||||||
3.3 Technical parameter of slewing mechanism
| Slewing mechanism | Motor | Model | YLEWF112M-145-6 B5 | |
| Power | N.m | 145 | ||
| Rotating speed | r/min | |||
| Reducer | Model | |||
| Reducer ratio | 195 | |||
| Output rotating torque | N.m | 16000 | ||
| Output speed | r/min | |||
| Gear of output end | Module m | 12 | ||
| No. of teeth z | 15 | |||
| Modification coefficient x | +0.5 | |||
| Host total ratio | ||||
| Host rotating speed | ||||
3.4 Technical parameter of jacking mechanism
| Jacking mechanism | Motor | Power | kW | 11 |
| Rotating speed | r/min | |||
| Hydraulic pump | Flow rate | l/min | 14.5 | |
| Work pressure | Mpa | 28 | ||
| Jacking cylinder | Dia. Of cylinder/rod | mm | 220/140 | |
| Max. jacking force | t | 100 | ||
| Jacking speed | m/min | 0.35 |
