12T topless tower crane with CE ISO certificate

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1 set
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100 set/month

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Product Description:

Descriptions of our tower crane:

1, QTZ250 have competitive price and excellent quality, suitable for all kinds of construction project and can work under all kinds of work condition. With their working radius from 3.15m to 70m, QTZ250 tower cranes are famous for their large operating ranges, varied working methods and wide uses.  

2,This series of tower cranes has a horizontal jib frame, a jib-trolley radius-changing mechanism and a hydraulic self-raising mechanism.

3, It is original in design, reliable in operation and satisfactory in shape.

4,Equipped with all necessary safety devices, these cranes show a good speed-control capacity,, satisfactory operating stability and high work efficiency.

5,They are widely applied for the construction of high-rise hotels, resident buildings, high-rise industrial buildings, large-span factory buildings and tower like buildings like tall chimneys. Best after sales service will be offered which will get rid of all your worries in the purchase of our products

Advantage of our tower crane:

1, boom relief Angle is big, greatly widened the equipment capacity and scope of work.

2, suitable for the group of tower cross homework.

3, boom stability is good, combination amplitude range.

4, suitable for height have special requirements occasions construction.

5, lifting capacity big, effectively solve the high steel structure construction team crane big lifting capacity requirements.

Specification of our tower crane:

12T topless tower crane with CE ISO certificate

12T topless tower crane with CE ISO certificate

12T topless tower crane with CE ISO certificate

12T topless tower crane with CE ISO certificate

 

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Q:How to change the mechanical property unit of crane (tower crane)?
Measures for the record and registration of construction hoisting machineryArticle 1 These measures are formulated in accordance with the provisions on the supervision and administration of the safety of construction cranes' machinery (Order No. 166th of the Ministry of construction) in order to strengthen the management of the record and registration of construction cranes.The construction and registration of the hoisting machinery as mentioned in the present Measures shall include the registration of the lifting machinery, the installation (disassembly), the notification and the use of the registration of the second.Third construction departments of the people's governments at or above the county level may use the computer information management system to handle the registration and registration of construction hoisting machinery, and establish a database.The construction administrative department of the local people's government at or above the county level shall provide the registration and registration and inquiry service of the building hoisting machinery within its administrative area.Article fourth rental, installation and use of units shall be submitted in accordance with the provisions of the lifting of construction machinery registration information, and the authenticity of the information provided by the responsible.The construction administrative department of the local people's government at or above the county level shall establish a system for the examination and registration of the hoisting machinery.Fifth construction machinery rental units or purchase building lifting units (hereinafter referred to as the "property units") in the construction machinery rental for the first time or before the installation, should be registered at the competent construction Department of the local people's governments at or above the county level to the unit of business (hereinafter referred to as the "equipment registration authority") for the record.
Q:What kind of personnel should be installed for the tower crane installation and disassembly?
According to GB specifications:2.0.3 the installation and disassembly of tower cranes shall be provided with the following personnel:1. The project and the safety supervisor and the mechanical management personnel who have the safety inspection certificate;2, with special construction operation qualification certificate of construction, lifting machinery, installation, demolition workers, lifting signal workers, lifting drivers, cable operators and other special operations personnel.And an electrician.
Q:All types of jack up cranes. How is the maximum lifting torque converted?
The moment of the tower crane is set up by the factory, and can not be changed. How do you want to convert it?If the nominal torque is converted to kn tons, 1 tons is equal to 9.8 kn.
Q:Method for operating tower crane
In the 2.11 operation, when lifting the weight, the weight should be higher than the height of the obstacle, at least 100mm.2.12 when the crane is approaching the track limit, it should slow down and stop in advance.2.13 when lifting heavy objects, not heavy lifting suspension instability, no additional weight in lifting objects, lifting scattered materials or special-shaped components must be used when the wire rope firmly tied to heavy lifting from the ground about 50cm stop, determine the brake materials, lashing and rigging, confirmation before lifting command.2.14 cranes must be adequately illuminated at night.2.15 crane in the stop, rest or midway power failure, the weight should be unloaded, not to weight suspended in the air.2.16 the operating room, no personnel shall enter, prohibited flammable and impede the operation of the items.2.17 is strictly prohibited or promotion personnel riding crane. Landing weight, weight is prohibited to stand.2.18 the boom and lifting pieces of cranes must be in safe distance from overhead transmission lines, and shall comply with the provisions of this schedule 30.1.6.2.19, two cranes in a track or two parallel or vertical orbit on the operation, should maintain the safety of any part of the distance between two machines, the minimum shall not be less than 5m.2.20 in case of any of the following circumstances, suspension operation shall be suspended:1., in the event of bad weather, such as heavy rain, heavy snow, fog and construction work surface has six (including six) above the strong winds, affecting safety construction.2. crane leakage occurs.3. serious wear of wire rope, to scrap standard (wire rope scrap standard see Appendix A).4. safety guards fail or display inaccurate.
Q:What are the luffing, slewing, and walking points of a tower crane?
The luffing of a tower crane is the forearm of a crane;Slewing means the steering mechanism of a crane;Walking means the walking trolley on the luffing range of a crane
Q:What are the "2 magnification" and "4 magnification" mentioned in the lifting characteristics table of tower cranes?
Popular saying: "car to hook this section of vertical distance, you see 4 wire rope is 4 magnification, you see 2 wire rope is 2 magnification.".
Q:What windproof devices should be set up for crane work?
Safety protection device and function of crane1. overload limiterIt is a safety guard for cranes to prevent overload, also called a weight limiter. The safety function of the utility model is that when the crane load exceeds the rated value, the lifting action is stopped, so as to avoid overloading. Overload limiters are widely used in bridge type cranes and elevators. Some boom type cranes (such as tower cranes and gantry cranes) use the overload limiter and the torque limiter together. Overload limiter has mechanical, electronic and many types.(1): mechanical drive ram through a lever and a spring cam, etc., when overloaded, hit the switch control rod and the lifting action phase, cut off the power source of hoisting mechanism, control the lifting mechanism to suspend operations.(2) electronic: composed of a sensor, an operational amplifier, to control the actuator and load indicator, display, control and alarm and other security functions in a body. When the crane is loaded, the sensor on the load bearing component is deformed, and the load weight is converted into an electric signal, and the value of the load is indicated by operation amplification. When the load exceeds the rated load, the power source of the lifting mechanism is cut off so that the lifting action of the lifting mechanism can not be realized.
Q:What does tower crane 400tm mean?
Lifting torque of 400 tons. Meters, also known as 4000KN/m, refers to the QTZ400 tower crane, the general maximum lifting capacity of 25 tons, big arm 70 meters, the most front-end hanging 5.2 tons, independent height of about 70 meters. Normally we say QTZ40 tower crane is lifting torque of 40 tons. Meters, 400KN/m.
Q:What is a TQ80 tower crane?
To put it simply, QTZ is updated than the TQ model, and the TQ series first appeared in 70s, and the QTZ series came out in the 80,90. Various parameters must be more advanced than TQ.
Q:About tower crane torque limiter with 4 limit switches, each play a role, thank you
The maximum amplitude control: when the weight exceeds or prohibit increase load rate of more than 105% or greater than the maximum amplitude (amplitude limit) output control, allowing the car to be near range by car distance to increase amplitude is prohibited.Minimum range control: when the amplitude is less than the minimum amplitude (amplitude lower limit), the output control allows the car to move to a distant range, i.e., to increase

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