Tower Crane TC7021 Construction Equipment Wholesaler Sale

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Tower Crane TC7021 Description:

1.CMAX Tower Crane TC7021  is one of the main product of CNBM company, which have competitive price and excellent quality, suitable for all kinds of construction project and can work under all kinds of work condition.

2. Tower Crane TC7021 can adopts standard section hydraulic lifting and connecting, and can decide the crane height according to the actual height of the building, and at the same time the lifting capacity will not be affected.

3. Tower Crane TC7021 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.

4.Tower Crane TC7021  has complete set of safety devices, which can guarantee the safe and high efficienct operation of the equipment. The machine is equipped with lifting height limiter, dolly range-change limiter, moment limiter,weightlimiter,circumgyrating limiter,and so on. 

5.Tower Crane TC7021  has scientific layout and beautiful appearance. The operator's room is set independently on one side, with good vision field. It creates a good working environment for the operato.


Tower Crane TC7021  Parameter:

 Max. working range 70m, tip lifting weight 2.1T and Max. lifting weight 12T.

Hoisting mechanism fitted with three speed motor, stable braking and less shock when shifting.

Trolleying mechanism can provide two operation speeds.

Free standing height (m) 50

Max height with attachment (m) 200

Working range can be adjusted (m) 40、45、50、55、60、65、70

Min working range (m) 2.5

Max lifting capacity (t) 12

Tip load @ 50m (t) 2.1


Tower Crane TC7021   Packaging & Delivery:

40HQ container

20~25days after deposit


Tower Crane TC7021Diagram:

Tower Crane TC7021 Construction Equipment Wholesaler Sale

Tower Crane TC7021 Construction Equipment Wholesaler Sale

Tower Crane TC7021 Technical Sheet:

Tower Crane TC7021 Construction Equipment Wholesaler Sale

Tower Crane TC7021 FAQ:

1.What is tower crane?

Tower crane is a modern form of balance crane that consist of the same basic parts. Fixed to the ground on a concrete foundation (and sometimes attached to the sides of structures as well), tower cranes often give the best combination of height and lifting capacity and are used in the construction site.

2. What is the meaning of the tower crane’s code?

Take Tower Crane TC7021 for example, the first two letters “TC” means Tower Crane, “70”means jib length is 70 meter, and the last two letter “21” means the tip load is :2.1 ton.

3. What is the principal to quote the right tower crane to the client?

First, we need to know clients’ requirements,for example, max lifting capacity, height, tip load and jib length.. Second, we need to know what the foundation requirement from the client is and Third if there are special needs. CNBM could suggest proposal according to clear data provided by the clients.

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Q:What is the insulation resistance of tower crane?
Three. Technical specification for temporary power safety on construction site JGJ 46-20055.4.2 within the construction site crane, derrick and Longmen machinery equipment, metal structure and steel scaffolding and under construction in construction projects, when lightning protection devices in adjacent buildings, structures and other facilities outside the protect zone of lightning arrester, lightning protection device should be installed in accordance with the provisions of.5.4.7 lightning protection electrical equipment machinery, connected to the PE line must repeat grounding at the same time, with a repeat of the mechanical and electrical equipment grounding and lightning protection grounding machines can share the same grounding body, but should be consistent with the repeated grounding resistance of grounding resistance requirements.The electrical equipment of 9.2.1 tower crane shall comply with the requirements of the current national standard "safety regulations for tower cranes" GB5144.9.2.2 tower cranes shall be subjected to repeated earthing and lightning protection grounding as specified in Clause 5.4.7 of this code. The earthing device of the track type tower crane shall comply with the following requirements:L the two ends of the rail are respectively provided with a grounding device;The joint of the 2 track is electrically connected, and the ends of the two tracks are electrically connected in the loop;3 long track every is not more than 30m and a grounding device.
Q:What is the difference between a tower crane and a jack up tower crane?
The jack up tower crane is a tower crane (that is an internal climbing tower crane) that is added and reduced by its own special device, namely, the standard section of the tower (that is, the attached tower crane) or the whole climbing tower itself.
Q:What is the torque limiter of the tower crane A: the lift is stopped when the lifting torque is exceeded. B: over gravity
The torque limiter acts as follows: (a)In lifting process, when the weight of the lifting object moves ahead of the trolley when the lever force exceeds the moment limiter, the hook rises, the motor and the trolley forward motor are stopped at the same time, and the utility model has the safety function.
Q:Protective earthing resistance of tower crane
Q:What should be included in the disassembly plan of the tower crane?
- 1 -Contents and requirements of special construction plan for tower crane installation1. General situation of Engineering; 2, installation location and elevation plane3. The type, performance and technical parameters of the tower crane selected4,; foundation and attachment device set(1)The foundation of tower crane and the bearing capacity of its foundation shall comply with the product specificationRequirements for books and design drawings. Before installation, the foundation shall be checked and accepted before installation. There should be drainage facilities around the foundation.(2)Attached tower crane is used, the attachment device and set freeThe end height shall comply with the requirements of the product manual. When adhering to a horizontal distance or attachmentThe design calculation and drawing system should be carried out when the spacing is not satisfied with the requirements of the product specificationDrawing and writing relevant instructions shall be examined and approved by the technical leaders of the enterprise or through the originalManufacturer confirmation. Attachment device and component shall be the original manufacturer or by embedded partsEnterprise with corresponding ability to make. Attachment device design, the main structure of the building to support the checking.5, climbing conditions and adhesion node detail;The foundation, anchor and climbing support structure of an internal climbing tower crane shall be used as the foundationAccording to the product manual to provide the design calculation, and the internal climbing tower crane bearing structure checking.6, the main components of the weight lifting and installation position.7, the installation of auxiliary equipment; the type, performance and arrangement position.8. Rigging and special tools9, set the power supply;10, the construction personnel configuration;
Q:What is the inspection certificate for tower cranes?
Inspection certificate of tower crane must have two certificates:1, the manufacturer issued its own "product quality certificate"2. The product quality supervision and inspection certificate issued by the Technical Supervision Bureau
Q:What is the brand of ZOOMLION tower crane?
How big is the lift? It depends on the size of the motor you use. 24KW motor, the choice is about 100A. 30KW uses 125-150A, 55KW, and 150-180A;Generally 40A contactor is used for turningCar selection of 25A on it.
Q:What role does the tower crane torque limiter play?
The torque limiter has two kinds of electronic type and mechanical type, electronic type: can show the torque, radius and load, near the tower crane permit torque, there will be a warning signal, although easy to use, the working conditions of cutting has been greatly affected, but not very reliable, easy to damage, the maintenance of trouble. Mechanical type: Although there is no display and can not alarm, but the work of the letter, the structure is simple, not easy to damage, suitable for construction site conditions.
Q:What is the calibration value of a tower crane?
Tower crane calibration value is to benchmark material to be calibrated by standard liquid titration value, calibration to parallel mark three times, take the average value, if the requirement is not strict, error within 3 per thousand, strictly within 1 per thousand.Main performance parameters of tower crane:1. Lifting weight G1. weight G - was the quality of the heavy lift. The unit is t.2. rated lifting weight Gn allows crane lift weights together with the quality of the sum of the spreader.3. maximum weight Gmax - normal work conditions under the crane, the maximum permissible rated lifting weight lifting.Two, range LL - 1. range of level ground when the crane is positioned between the spreader, no-load vertical center line to the center line of the rotary horizontal distance. The unit is m.2. biggest Lmax - crane, jib angle or the minimum car in arm the limit position of the amplitude.3. Lmin minimum amplitude - jib angle or trolley jib in maximum limit position within the range.
Q:Examples of filling and acceptance forms for tower cranes and examples of filling in.
4 data filled in the requirements of the project, in addition to fill in the above sign, but also need to fill in the corresponding data. Data that needs to be filled in should be separated by "/" or "," and, if necessary, distinguished by text or graphic.

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