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Place of Origin
HS-CODE
73-
Package & Delivery Lead Time
Detailed Description
Summarize
QTZ5010 tower crane is designed by JINAN JIHONG MACHINERY Co., LTD. It makes full use of the grouping technology, composite design technology and finite element analysis technology, which is the newest lifting transportation machinery in domestic and designed with the tower crane microcomputer platform as the tool.
This machine is horizontal arm, truck derricking, and upper-circumgyrating hydraulic climbing tower crane. Maximum lifting capacity is 4t, Maximum lifting torque is 500 kN•m.
The main features of this tower crane:
(1) Performance parameters and technical indexes have reached the domestic and international advanced level. The maximum working range is 50 m, which increases the working space of the tower.
(2) The shape is international popular form, beautiful and generous.
(3) Working mode various, widely using range. It has two working ways, basic fixed and wall attachment. It is suitable for various construction objects. The independent hoisting height is 30 meters, the attached height is 120 meters (a=2) and 60 meters (a=4)
(4) It has high speed, good performance, high efficiency and working stability.
There are many single speed motor and winding speed reducer, which can achieve high speed and heavy load, the maximum speed can reach 80.36 m/min.
Truck derricking mechanism in horizontal arm traction car horns, has a good performance in installation.
By using winding motor rotation, planetary gear reducer and hydraulic coupling, it has high bearing capacity, smooth, reliable working capacity and good ability wind resistance.
(5) Crane arm used rigid dual pull rods, which has good rigidity, small light weight, and small wind resistance, even strength and artistic appearance.
(6) Various safety devices could ensure the machine work safe and reliable.
(7) The hoisting box stands alone and side and has clear view.
(8) It is convenient to use and easy to maintenance.
The deadweight of the machine is 20t; the total installed capacity is 25.7 kW. This machine is always applied to large-scale construction of high-tower buildings, like the high-level hotel, the residential building, which is the ideal construction machinery to the building enterprise.
2. Technical characteristic
2.1 Hoisting performance table
Rang(m) a=4(kg) a=2(kg)
3～12.5 4000 2000
13 3934 1958
14 3627 1866
15 3361 1782
16 3128 1703
17 2923 1631
18 2741 1563
19 2577 1500
20 2431 1441
21 2298 1386
22 2177 1334
23 2066 1285
24 1965 1238
25 1872 1195
26 1786 1154
27 1707 1115
28 1633 1077
29 1564 1042
30 1500 1009
31 1440 977
32 1384 946
33 1331 917
34 1281 890
35 1250 863
36 1230 838
37 1210 813
38 1190 790
39 1175 768
40 1160 -
41 1150 -
42 1130 -
43 1120 -
44 1090 -
45 1070 -
46 1053 -
47 1040 -
48 1035 -
49 1025 -
50 1000 -
2.2 Technical feature
Project Unit a=2 a=4
Rated load moment kN•m 500
Max. hoisting capacity T 2 4
Rated radius m 3~50
Hoisting height Freestanding m 30
Attaching 120 60
Exterior dimensions of full crane Underbed m 6.4×6.4
Height(Freestanding) 38.36
Distance between the head of counter-jib and swing center 51
Distance between the end of counter-jib and swing center 11.425
Net weight of full crane Structure weight
(Freestanding) t 20
Counter weight 44
Total capacity of the motor kW 25.7
Allow working temperature ℃ -20~+40
Power supply parameter 50Hz ~380V±10%
2.3 The main technique parameters
Mechanism loadability Hoisting mechanism JC 40%
Slewing mechanism JC 40%
Trolley winch JC 40%
Hoisting Mechanism Motor Type YZTD225-4/8/24
Running speed r/min 1440 750 220
Power kW 15 15 4
Reducer Distance between center points mm 460
Transmission ratio i 12.5
Winch drum Diameter mm Φ273
Layers 层 5
Rope m 280
Running speed r/min 115 57 17
Brake Type YWZ-250/45-10
Braking force N 450
Wire rope Traction force N 10000
Specification 6×19-11-1770-Ⅰ甲镀右交
Hoisting speed m/min 53.3/26.0 26.4/13.2 15.7/16.9
Rated hoisting capacity T 1/2 2/4 2/4
Min. stabilized load-lowering speed m/min ≤7
Total weight T 1.2
Slewing mechanism Motor Type YZR132M2-6
Running speed r/min 908
Power kW 3.7
Reducer Type XJL-80
Transmission I 180
Output torque N•m 10000
Slewing bearing Type 011.40.1120
Gear Modulus m 10
Tooth counting z 15
Addendum coefficient x +0.5
Torque counverter Type YOX250A
Slewing speed r/min 0-0.62
Hydraulic climbing mechanism Hydraulic pump Working pressure MPa 20
Power kW 4
Type of oil pump CB306
Climbing cylinder Rated pressure MPa 20
Diameter of cylinder mm Φ140
Diameter of rod mm Φ90
Stroke mm 1320
Installing distance mm 1700
Climbing speed m/min 0.4
Max. climbing force T 24.6
2.4 Hoisting Characteristic Diagram
a=2
a=4
2.5 Power parameters:
2.5.1 Machine total power: 25.7 kW
2.5.2 Power supply voltage: 380V ± 10%,
2.5.3 Power frequency: frequency: 50Hz
3. General introduction of crane construction
QTZ5010 self-erecting tower crane is comprised of base, metal structure, working mechanism, electrical control and safety protection device(Fig 1). The structure and characteristic introduction of every part are as follows:
Fig1
3.1 General arrangement
Before the working height is up to 30m, freestanding is used. When the height exceeds 30m, the attachment is available. When using the attachment, the free height between the top attachment and the focus should less than 22m.
The height of the tower is made up of heights of foundation sections and the standard sections. Free standing includes 13 tower sections (1 foundation sections and 12 standard sections). When the max. Hoisting height 120m, which will be made up of 49 tower sections (1 foundation sections and 48 standard sections), meanwhile with 6 attachment devices. The attachment embedded parts are buried in the well counted position，so as to attach the tower to the building with attachment stay bar.
In the special concrete base, there is the well prepared stone bolt connected with the underbed. The top of the underbed connects with the tower. The top of the tower connects with the lower bracket and the top of lower bracket connects with the outline of swing bearing. Fastening the inside of the swing bearing is the slewing sections, which includes upper bracket, swing tower, tower head, lifting jib, counter jib, derricking trolley, hook, counter weight, hoisting mechanism, slewing mechanism and the hoisting cab, etc. All these parts could slew 540°around the tower’s axes line on its own plane.
The root of the lifting jib connects with the slewing tower and wind connects with the tower head by two lifting jib pull rods. The counter jib foot connects with the slewing tower pin roll and the end are connected to tower head by two counter jib pull rods. Climbing mechanism is set up the central back of counter jib and the slewing mechanism lies in the two sides of upper bracket, the right front of it is hoisting cab. The derricking trolley and hook are pulled by the derricking mechanism to do reciprocating movement along the longitudinal axis of the hoist boom.
The climbing mechanism is composed of climbing frame and hydraulic climbing device. The climbing frame is framework steel structure, which connects with the lower bracket with pin roll. The back of it is hydraulic climbing mechanism including climbing cylinder and climbing beam. The hydraulic station sets up to the frame working plate. When climbing, frame lower bracket and the upper section climbs are been as the tower axes line. A tower section is added when the cylinder climbs twice.
3.2 Metal structure
Metal structures mainly include underbed, stay bar, tower, climbing frame, upper and lower bracket, swing tower, lifting-jib, counter-jib, Pull rod of lifting-jib, pull rod of counter-jib, derricking trolley, cap head and attaching device, etc.
3.2.1 Underbed (Shown in Fig 2)
Underbed is beam structure of “cross” form. a whole beam, two half beams are connected with upper and lower board with 24 bolts. And they are fixed on the foundation with 28 anchor bolts which are in the foundation originally. Welded 4 ear-pedestals are on cross beam, which is bevelled braced on the second standard section individually with 4 bevel rods by ear-pedestals. There are 4 rectangle flanges on the cross beam connected to tower with reinforcing section.
Fig 2 Underbed
3.2.2 Tower (shown in Fig. 3)
Fig 3 diagrammatic of tower sections
There are two kinds of tower section including 1 foundation sections and 15 standard sections. They have the same outline dimensions except for the thickness of their main boom-walls. Reinforcing sections should be install foundation sections successively when used. Upper surface and lower surface of standard section are connected individually by 8 bolts of M37 (10.9 grade) with high strength. There are ladders on each standard section for persons and some standard sections have platforms for rest which are set.
3.2.3 Climbing frame (shown n Fig. 4)
Climbing frame mainly includes frame structure, platform, hydraulic, climbing system and standard sections pulling-in device, etc. The climbing operation mainly depends on this climbing frame. Climbing oil cylinder is installed on the beam which lies on the back of climbing frame. Hydraulic pump station lies on the platform at the side of hydraulic cylinder.
Climbing frame lies on the outer of tower, the top of which is connected to the lower bracket. Pulling-in window is arranged on the half top of the front climbing frame so as to add standard section. There are 16 rolling wheels inside the climbing frame braced at the outer of tower main robs which serve as leading and supporting components.
There is a kelly working platform on the frame to the needs of installation and safety of climbing. When climbing, the workers stand on the platform to operate the hydraulic system to finish the climbing and add the standard sections and strengthen the tower bolts.
Fig 4 diagrammatic of climbing frame
3.2.4 Lower bracket, Upper bracket, Hoisting box, Swing tower(shown in Fig 5)
The lower bracket has the structure of whole-box. The under part of lower bracket is connected to tower standard section and climbing frame separately. The top surface is tightly connected with the under surface of housing washer of swing bearing which is not swing by high reinforcing bolts.
The upper bracket has the structure of plate-shell. Flange with swing mechanism is welded on its left and right sides. Working platform is arranged on three sides of upper bracket. Hoisting box is installed on the front of right working platform. There are lamp socket for searchlight and bracket for swing limiter. The top surface of upper bracket is connected with slewing tower by 4 orthogonal pivots.
Swing tower has the structure of whole frame. There is double-ear plate on 4 corners of its top surface connecting to tower head, lifting-jib and counter-jib with pivots. There are 4 orthogonal pivots connected with upper bracket.
Fig. 5
3.2.5 Tower head (shown in Fig. 6)
Tower head has the structure of front-slope rectangular pyramid. Pulling plate frame, pull plate of lifting-jib and pull plate of counter-jib are welded on its top, connecting with lifting-jib and counter-jib by combined rigid pull rods and pivots. To install each pull rod, working platform is arranged on the cat head connecting with cat head by pivots. Platform can be disassembled when transporting. There are a hoist rope-guiding pulley bracket on the upper section of tower head and a pulley for installation of lifting-jib pull rod onto top of cat head. Ladder with guard ring to cat head is arranged at the back of top tower for convenient installation and maintenance. The bottom of cat head is connected with swing tower by 4 pivots.
Fig 6 diagrammatic of tower head
Fig 7 diagrammatic of counter jib
3.2.6 Counter-jib (shown in Fig. 7)
Counter-jib has the structure of whole plane. Guard-rail and aisle are arranged on counter-jib. Operating platform is get up at the end of counter-jib. One end of counter-jib is connected with swing tower by 2 pivots. The other end is connected with cat head by 2 combined rigid pull rods. There’re counter-weight and load-lifting mechanism installed at the end of counter-jib. Resistance box and electric control box are set up at the front side. Lifting mechanism has its independent Underbed itself and is fixed on counter-jib by 4 groups of ear-plates and pivots.
Fig 8
3.2.7 Lifting-jib (shown in Fig.9)
Upper booms of lifting-jib are made of seamless steel tube. Lower booms are rectangle tube welded by two angle irons. The whole jib frame has the section of isosceles triangle divided into 9 sections. Sections are connected by pivots for convenient disassembly and assembly. In order to improve lifting performance and reduce the weight of lifting-jib, lifting-jib adopts double hanging points. Lower chord changes the section into space truss structure. Traction mechanism is set on the second of lifting-jib. Hoisting basket is designed for trolley for convenient installation and maintain. The first section of the root jib frame is connected to swing tower with pivots.
Two hoisting points are arranged separately on the third and the eighth section, by which pull rods are connected with top tower.
When assembling lifting-jib, tag and assembly must be strictly carried out according to the serial number of each jib. Don’t allow to assemble in wrong position or at will.
According to the practical situation, if the length of the lifting-jib needs to be changed, you can change the jib by changing the section number of lifting-jib, the length of the pull rod and the number of the counter weight.
Attentions:
Upper boom, lower boom of lifting-jib and pull rod pivots are special components. They must not be replaced.
Fig 9 diagrammatic of lifting jib
3.2.8 Derricking trolley(Fig. 10)
Derricking trolley and lifting hooks are driving along the longitudinal axis items hoist boom reciprocating motion of steel structure, which possesses 4 walking pulleys and 4 directing pulleys and each side has two pulleys. The orbit they running is the lower boom pole of the counter jib.
Fig 10
3.2.9 Hook(Fig. 11)
The purpose of pulley rate device is to double lifting ability of hoisting mechanism and lower hoisting speed down to 1/2 times. Therefore hoisting mechanism can more flexibly satisfy the demand of construction. The ratio of hoisting pulley can be changed into 2 or 4 by changing the position of active pulley. The ratio of trolley and hoisting hook pulley is 4 when they are out of factory.
Fig 11
3.2.10 Attaching device (shown in Fig.12)
When the hoisting height is surpassing the freestanding height 30m, we should use attaching devices to fix the tower and the building. The attaching points are shown in Fig. 1. When using the attaching, the free height between the top attaching and the hinge point should no more than 22m.
Every set of attaching device includes attaching frames and four supporting rods. Attaching frame is composed of two sets of half-ring beams and 16 sets of bolts of M24, nuts and washers fixed tightly. Four comer points of anchorage splice four brace rods. Frame is hinged with 4 supporting robs at its 4 corner points. Adjustable bolts are arranged on 4 supporting robs at the hinging points to adjust the length of supporting rods.
There are big ear-rings at the end of four supporting rods hinging with building. Four supporting rods should be kept at the same level, pushing a head block to fix tower by adjusting bolts.
Attaching frame is arranged according to the distance of 4m between crane centre line and building. If the real value isn’t equal to design value, supporting rods can be lengthened or shortened appropriately. But the value must be calculated strictly. They way of connection between supporting rods and building varies according to the facts.
According to the project demand, clients and installation departments should appropriately arrange the attaching work of crane and building based on the dimension and structure attaching device and the offered data of intensity load.
Fig 12
3.3 Working mechanism
Working mechanism of crane includes load-lifting mechanism, swing mechanism, trolley derricking mechanism and climbing mechanism. Brief introduction of them is shown as follows.
3.3.1 Lifting mechanism (shown in Fig.13)
Fig 13 Lifting mechanism
3.3.2 Swing mechanism (shown in Fig. 14)
Fig. 14 Transmission system of swing mechanism
3.3.3 Trolley derricking mechanism（Fig. 15）
Fig. 15 Trolley derricking mechanism
3.3.4 Climbing mechanism (shown in Fig. 16)
Fig. 16
The climbing mechanism is composed of hydraulic system pump station, climbing cylinder and soft tube with high pressure, etc. And special hydraulic oil is filled in it. It can lift and descend the upper section of tower frame and keep it at any position to make assembly and disassembly of standard section more convenient.
This hydraulic device is of compact structure, high efficiency, convenient application and maintenance, safety and reliability.
3.4 Safety device and debugging
Safety device mainly include load moment, lifting capacity, hoisting height, swing and derricking limiter and anemoscope. FKDK multifunctional limiter can efficiently limit load moment. Lifting height and working range.
3.5 Working mechanism
Working mechanism of crane includes load-lifting mechanism, swing mechanism, trolley derricking mechanism and climbing mechanism. Brief introduction of them is shown as follows.
3.5.1 Lifting mechanism
The type of motor in the lifting mechanism is YZRDW225-4/8-15/15/4KW. The mechanism can get the hoisting feature of light load and high speed, heavy load and low speed. When hoisting things are in the highest position, the lifting mechanism can stop automatically.
3.5.2 Swing mechanism
Swing mechanism is double driven. They are arranged symmetrically on both sides of swing gearing. The type of motor is YZR132M2-6，3.7kW. Swing limiter is installed on the upper bracket, meshing with swing gear ring by small gear to control lifting-jib swing in about 540° to prevent twisting the cable.
According to the practical brake effect in application, adjusting nut (part 1) will shorten the distance between brake disc and friction wafer when braking moment is not enough. When the brake moment is too excessive, adjusting nut will increase the distance between brake disc and friction wafer. Trying operation for several times after adjustment is completed each time. Ensure the components 4.6.7 sliding on guiding bolt 5 without resistance and accurate shut and open action. Spring 5 should be replaced when it rusts seriously.
3.5.3 Trolley derricking mechanism
Trolley derricking mechanism utilizes motor of YD100L2-4/6 2.2/1.5KW to drive the reduction unit in winding drum to make trolley do derricking movement at 40/22 m/min speed. The whole structure is compact. One end of two rope is separately fixed on the winding drum and the other end is fixed on the load trolley to make the trolley operate normally by tightening and loosing the rope when derricking.
3.5.4 Climbing mechanism
The climbing mechanism is composed of hydraulic system pump station, climbing cylinder and soft tube with high pressure, etc. And special hydraulic oil is filled in it. It can lift and descend the upper section of tower frame and keep it at any position to make assembly and disassembly of standard section more convenient.
This hydraulic device is of compact structure, high efficiency, convenient application and maintenance, safety and reliability. Application, maintenance and attentions of hydraulic system are shown in detail in instruction manual of accessory components.
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