Tower Crane TC7021 QTZ250 New Mast Section

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$30,000.00 - 80,000.00 / unit
Loading Port:
China main port
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TT or LC
Min Order Qty:
1 unit
Supply Capability:
30 unit/month

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Item specifice:

Maximum Lifting Weight: 12T Maximum Lifting Height(M): 200M Rated Loading Capacity: 2.1T
Span: 70M Rated Load Moment: 250T.M

Product Description:

Detail of Tower Crane

 

Feature:Tower Crane 

Condition:New         

Model Number:TC7021(QTZ250) 

Place of Origin: China (Mainland)       

Brand Name: CMAX     

Certification: ISO,CE 

Warranty: 1 Year       

Application:Building,Construction,Industrial 

 

Main Features of Tower Crane

 

1) This series of tower cranes, ranging from QTZ40 to QTZ400 has a horizontal jib frame, a jib-trolley radius-changing mechanism and a hydraulic self-raising mechanism. It is original in design, reliable in operation and satisfactory in shape. Equipped with all necessary safety devices, these cranes show a good speed-control capacity, satisfactory operating stability and high work efficiency. They can be widely used for the construction of high-rise hotels, residential buildings, high-rise industrial buildings, large-span factory buildings and tower-like buildings like tall chimneys.

 

2) It has high working speed, good speed-adjusting performance, steady operation and high efficiency. Three-speed motor and mono-speed ratio decelerator are applied in the lifting struction, which enables heavy load low speed and light load high speed.


3)The range-change structure drives the trolley moving on the horizontal crang jib, with good positioning performance. Planet gear decelerator is applied in the circumgyrating structure, together with moment-limiting hydraulic coupler, which can relize high load capacity, steady starting and reliable operation.

 

4) The crane has complete set of safety devices, which can guarantee the safe and high efficienct operation. The crane is equipped with lifting height limiter, trolley ranging limiter, moment limiter, weight limiter etc..

 

5)The cranehas scientific layout and handsome appearance. The drivers cab is set independently on one side, with good vision field. It creates a good working environment for the operator.

 

Specification of Tower Crane 

Tower Crane TC7021 QTZ250 New Mast Section

Tower Crane TC7021 QTZ250 New Mast Section

Tower Crane TC7021 QTZ250 New Mast Section 

 

 

 Images of Tower Crane

Tower Crane 4808 40T.M New Mini Crane in China 

Tower Crane Main Section TC5613 in China

Tower Crane 4808 40T.M New Mini Crane in China

Tower Crane Max. lifting Weight 10T  in China

Tower Crane Max. lifting Weight 10T  in China

 

FAQ about Tower Crane

 

Q: What serice you could provide?

A: Providing timely delivery, standby engineers are ready to slove any of your problem

    Providing all-embraced warranty of products quality, worksite installation guidance

    Providing ample spare parts and training of operation and maintenance

    Engineers have more than 20 years' experience in tower crane, ready to solve any of your  problems.

 

Q: What kind of steel used for  tower crane ?

A: Normally, as for the main force bearing steel structure, Q345B is adopted; as for the assistance force bearing steel structure Q235B is adopted. All of the raw material is outsourced from qualified steel factory in China.

 

Q: What about our  tower crane  warranty?

A: Usually there is one-year quality warranty including main electronic parts (not including consumable parts). There are consumable spare parts together with whole machine and normally they are enough for one year.

 

Q: What is 3 main mechanism of the  tower crane ?

A: there are trolleying mechanism/ slewing mechanism/ hoisting mechanism.

 

Q: Can you equip with light on  tower crane  jib, monitor, remote control and anemometer?

A: Sure. All of these could be provided with extra cost upon the clients' requirements. But according to general practice, remote control is not suggested because most of the operator feedback operation in the cabin will provide a wide working view.


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Q:Do self lifting tower cranes allow a small swing of the boom in jacking operation?
The upper working structure of the attached tower crane is connected with the jacking sleeve frame, and a jack jack is mounted on the top lifting jacket frame. The upper crossbeam of the jack is connected with the jacking frame, and the lower cross beam is provided with a movable claw, and the lower supporting point can fall on the step of the standard section of the tower body. During lifting, first trim jib and balance arm, unlock the top are connected with a lifting sleeve frame with the standard section, start lifting system, lifting jack will superstructure.
Q:Protective earthing resistance of tower crane
Q:What is the definition of lifting, slewing and luffing of tower cranes?
Rotary is cantilever tower crane tower crane rotary shaft winding;Is the hook shaft distance amplitude change;
Q:What is the difference between a tower crane QTZ31.5 and a QTZ40?
the length of the arm is 42-48 meters; the elevation is 29-32 meters.
Q:Climbing process of an internal climbing tower crane
There are two kinds of climbing mechanisms: hydraulic and mechanical. The hydraulic climbing mechanism consists of a ladder ladder, a hydraulic cylinder, a climbing beam and a support leg. The climbing ladder is composed of an upper and a lower bearing beams, separated by two stories, which are fixed on the wall or side beam of the cylindrical structure when the work is used, and both sides of the ladder stand are provided with steps. The load bearing beam corresponds to the four main limbs of the crane tower, and is equipped with 8 guide rollers, which plays a guiding role when climbing.
Q:What are the conditions of tower cranes, strictly prohibited?
Tower cranes are prohibited under any of the following circumstances:1, the state explicitly eliminated products;2, more than the required service life, failed to assess the quality of products;3, products that do not meet the current relevant standards of the state;4, there is no complete security technical records of the product.Tower crane (tower crane) is called tower crane, also known as tower crane, originated in Western europe. A revolving crane mounted on top of a tall tower. The working space is large, mainly used for the vertical and horizontal transportation of materials and the installation of building components during the building construction. It consists of three parts: metal structure, working mechanism and electrical system.
Q:When the tower crane is installed in the fertilizer tank,
Pouring foundation does not increase the foundation safety first
Q:What are the necessary safety devices on a tower crane?
(6) lightning protection and anti electromagnetic wave induction device;For the crane whose hinge height is over 50m, the lightning arrester shall be installed according to the actual situation and the electromagnetic interference shall be taken.(7) tower crane shall install limit torque coupling in order to prevent slewing overload(8) anti stripping device prevents the rope from working position(9) the device prevents the rope from breaking and the trolley is free to slide(10) the car prevents the broken axle device, prevents the trolley wheel to fall off the axle, then falls(11) each part of the brake is a working device and a safety device
Q:What windproof devices should be set up for crane work?
4. windproof anti-skid safety deviceThe utility model is a safety device for preventing the crane of the open-air work from sliding along the track under the action of strong wind, and the outdoor working track type crane shall be installed. The safety function of the utility model is that when the crane encounters the maximum wind force in the non working state, the crane is not blown to prevent the crane from overturning at the end of the rail. Common windproof devices include rail clamps, anchoring devices, and iron shoes.(1) rail clamping device: it is widely used in all kinds of outdoor track crane, its working principle is to use the two sides of a clamp rail head, the crane is fixed on the track through the combination of the clamping force, the crane can not slip. The design requirements of rail clamp, clamping force of rail clamp must be greater than the crane sliding force, to ensure that the local maximum wind, crane stays closed; rail tongs should rely on device components own weight or spring, and should not only rely on the driving effect of the power of the driving device, to to prevent the power supply is interrupted, the rail clamping device does not work; power driven rail clamping action should be behind the operation mechanism of brake action violently to eliminate possible crane brake.(2) anchor device: it uses a bolt or a flashboard device, a chain or a top pole to connect the crane and the track foundation into one body, and is used for fixing the crane in the big storm when not working. Since the anchor device can only be located in a certain position of the track, the crane can be anchored to this position, which is not suitable for immediate weather protection in an emergency.(3) iron shoes: it is a wedge device, when used, the wedge-shaped tongue inserted between the wheel tread and rail top surface, the iron shoes of the slope constitute the resistance to sliding wheels.
Q:Safety rules for tower cranes
Three. Check after shutdown3.1 after the tower crane has stopped operation, it is necessary to select the suitable position of the barrier and the middle of the track when the turret is turned and the arm to stop along the wind, and then lock all the rail clamps.All 3.2 tower crane rotary mechanism with a normally closed or braking device, in the stop after the operation, the driver must remove the handle, release the brake for crane in the wind blowing in under the direction of rotation.3.3, the hook should be lifted to the minimum distance from the lifting wall, not more than 5m position, hanging on the hook is strictly prohibited. Not to take reliable measures, not by any means, limiting the boom rotate with the wind.

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