TC5012A tower crane / QTZ63A tower crane

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1 set
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Q:What is a tower crane without a collector?
The advantage of the collector is that the tower crane can be turned on one side without any limit, and how many circles can be turned. The tower crane is basically not equipped with collector, because collector generally needs to be located at the center of the tower's turning center, so it is inconvenient for operators to go up and down.
Q:What is the allowable range of vertical deviation for tower cranes?
Independent height 4/1000, attachment height 2/1000 under top wall!
Q:Tower crane and construction hoist service life? What are the norms and standards? How to detect?
According to Hangzhou quality safety supervision station (2011) No. 56 document:Six, strengthen the use of longer construction crane management1, more than the required number of tower cranes and construction hoist should be qualified units for security assessment, the specific years with reference to the following requirements.Tower crane: 630KN.m (excluding 630KN.m), factory more than 10 years of age (including 10 years); 630KN.m1250KN.m (excluding 1250KN.m), factory more than 15 years of age (including 15 years);
Q:What is the difference between crawler crane and tower crane?
There are many differencesThe crawler is used to transport items in a smaller range of motion (site)A tower, used for construction, stationary, or maneuvering along a railroad track.Crawler can easily reach the magnitude of 50 tons or moreMore than ten tons of tower are relatively commonTrack internal combustion engine, hydraulicTower type general power consumptionWait, wait......
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:What is the difference between a tower crane QTZ31.5 and a QTZ40?
Lifting moment, arm length, elevation is not the same ah! Specifically, the maximum lifting weight of QTZ315 is 3 tons, the length of the arm is from 38-42 meters, the elevation is 27-28 meters; the maximum QTZ40 is 4 tons;
Q:Minimum QTZ63 tower crane special electric box open for many A
QTZ63 tower crane with air and leakage protection:Minimum three-phase air switch not less than 100A; at the same time leakage protector is not less than 100A three-phase four wire system leakage protection.Maximum three-phase air switch not greater than 150A; at the same time, leakage protector is not more than 150A of three-phase four wire system leakage protection.
Q:What are the main parameters of a tower crane?
For car luffing tower cranes, the maximum lifting height is only related to the height of the tower, and when the height of the tower is determined, the maximum height of the ceiling is a certain value.In addition to the 4 major performance parameters. And the working speed (including lifting speed, rotary speed and walking speed of car, traction speed), an important parameter gauge, wheelbase, total power, motor structure weight, balance and gross weight, etc.. These important parameters often determine the tower crane selection, such as speed of operation often determines the number of selected cranes, motor power requirements of power supply load, gauge, wheelbase of the site, and the structure weight, balance weight, weight of the foundation treatment of heavy machine requirement.Tower crane (tower crane) is called tower crane, also known as tower crane. 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. The tower crane consists of three parts: metal structure, working mechanism and electrical system. The metal structure includes the tower, the boom and the base. The working mechanism has four parts, lifting, luffing, turning and walking. The electrical system consists of motors, controllers, power distribution cabinets, connecting lines, signals and lighting devices, etc..
Q:In what circumstances should a tower crane be demonstrated by an expert?
(two) lifting equipment with lifting capacity of 300kN and above; climbing within height 200m or aboveDemolition of heavy equipment.
Q:What is the difference between a tower crane and a jack up tower crane?
Tower cranes, because there is no running mechanism, so tower crane can not do any movement. Fixed tower crane can be divided into the tower height invariant and Jack up. That is, the jack up tower crane is a kind of fixed tower crane.

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