Trustworthy Flatttop Crane (PT7528-20T)

• Customization: Available
• After-sales Service: 24 Hours
• Warranty: 1 Year
• Model NO.: PT7528-20T
• Certification: CE, ISO9001, ISO9001: 2000
• Condition: New
• Maximum Lifting Height: >250m
• Maximum Lifting Weight: >10t
• Installation: Jack-Up
• Moving Type: Fixed
• Type: Top-Slewing Crane
• Power Source: Hydraulic
• Sling Type: Wire Rope
• Application: Construction Usage
• Max. Radius: 75m
• Max Hoist Capacity: 20t
• Brand: Mingwei
• Model: PT7528-20t
• Dimension of Section: 1.835×1.835×2.5
• Transport Package: Nude in 40hq Container
• Specification: CE
• Trademark: Mingwei
• Origin: China
• HS Code: 8426200
• Production Capacity: 5000 Sets/Year

Product Description

PT7528-20T topless tower crane
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