tower crane/ construction machinery tower crane

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tower crane/ construction machinery tower crane

tower crane/ construction machinery tower crane


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Q:How to install the jack up tower crane 30How to install the jack up tower crane?
It is required from the upper plus height, then the crane through the motor (hydraulic is not I don't know if not carefully studied to estimate almost) slowly up, because the installation of crane is a separate Union, only the crane is fixed on the top, and is connected to the lower die width ratio some long, above there are for the installation of people stay small table, but also it can open from the opening above the dead ground fill and then fix it by bolt, and then put the live up to OK
Q:National standards for tower cranes
Tower crane GB/T5031 - 2008 has been implemented since February 1, 2009. In accordance with the new standards promulgated, chief editor -- China Academy of Building Research Institute of building mechanization of Langfang, Beijing and Hebei respectively in Hangzhou, Nanning held the new standards xuanguan. Luo Wenlong, director of the standard editor and vice president of Li Shoulin, explained the new standards comprehensively. The new standards are quite different from the previous standards, adding a lot of security related content, mainly embodied in the following 3 aspects: 1) the principle of different. Previously considered issues mainly consider the domestic tower crane industry technology status, appropriately reflect the advanced nature, and now is the requirements and international benchmarking, consider safety. 2) different forms of organization. The standard used in scientific research institutes, universities, factory assistant; the preparation unit including Research Institute, and the host plant, supporting enterprises, universities, inspection unit, there are relatively large units on behalf of (rental business), etc..
Q:Is a tower crane a fixed type crane? Still can walk? Thank you
The tower crane is the equipment that can be used in the construction site and is not to walk.
Q:Why do tower cranes need to be fabricated?
The crane wire rope commonly used varieties of phosphating coating steel wire rope, galvanized steel wire, stainless steel wire rope, the use of atmospheric environment, patented technology to produce manganese phosphating coating of steel wire rope has the longest lifespan, heavy corrosion environment optimization of hot galvanized wire rope double - phosphating coating.Phosphating coating of steel wire rope production technology patent, give priority to the use of manganese or zinc manganese phosphating, and smooth steel wire rope production process comparison, just add the last bonderizing process, steel wire for rope wear resistance and corrosion resistance is greatly improved, the use of direct phosphating steel wire twisting steel wire rope.
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's the difference between QTZ63 and qtz630, isn't it the same kind of tower crane?
It's the same kind of tower crane, but it's only a unit of rated lifting torque. The former unit is 63 tons. M, the latter is 630 kn m. According to the latest national standard "tower crane", GB/T5031-2008 and QTZ63 are written correctly.
Q:What are the safety devices in a tower crane?
(1) lift height limit position limiterFor cranes with variable boom angles, the lifting motion must be stopped immediately when the top of the lifting device rises to the 8OOmm at the lower end of the boom.For luffing cranes, lift the top of the hook to the lower end of the frame 500mm. The lifting movement must be stopped immediately.(2) lifting moment limiter and maximum lift limiter;When the lifting torque reaches 90% of its rated value, the lifting torque limiter shall be able to issue an acoustic or red light to indicate the alarm. When the lifting torque exceeds its rated value and reaches 108% of the rated value, the lifting direction and outward direction shall be stopped.If the weight and amplitude indicator are set, the numerical value should be correct, clear and eye-catching. The digital error shall not exceed 5% of the indicated value.When the lifting weight exceeds the maximum weight, maximum lifting weight limiter should emit light or sound alarm, when the load exceeds the maximum weight of 6%, should stop to enhance the direction of movement, but to allow institutions towards the down direction.(3) amplitude limiting deviceA crane shall be equipped with a minimum amplitude limiter and a device for preventing the boom from rebounding backward. The trolley must be equipped with a trolley switch and a terminal buffer.(4) rail clamping device and walking spacing deviceTrack type tower cranes must be equipped with rail clamps. A walking limit device shall be installed at the same time.(5) anemometer;For cranes with a hinge height of more than 50m at the root of the boom, a anemometer shall be installed at the top.(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.
Q:What are the components of a tower crane? What are its main technical parameters? What is lifting torque?
1. Tower crane consists of three parts: metal structure, working mechanism and electrical system. The three main technical parameters are lifting moment, lifting weight and working speed. Lifting moment refers to the boom as the basic arm length maximum amplitude corresponding to the rated lifting weight of product, product or maximum weight with the corresponding inflection point.
Q:How to build a tower crane?
4, combination and installation with the boom, hung with arm pull rod.5, the assembly and installation of crane. This boom just installed in the rotary device, the other end is able to lift and hang rod, in accordance with the installation instructions.The power supply auxiliary hoist with 6, switch on the tower cap following installation, the installation of counterweight boom hoist with the.
Q:All types of jack up cranes. How is the maximum lifting torque converted?
Tower crane lifting torque = crane maximum lifting weight * maximum operating range; for example: the maximum lifting weight is 2T*, the maximum operating range of 50 meters =1000KN.m.

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