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Tower crane tower body combination method and combined tower body device

A technology of tower cranes and combined methods, which is applied in the direction of cranes, mechanical equipment, and rod connections, etc., can solve problems such as the inability to achieve independent heights of the tower body, lifting, etc., to improve interchangeability and utilization, and to solve potential safety hazards , the effect of simple assembly

Active Publication Date: 2021-04-06
JIANGXI ZHONGTIAN INTELLIGENT EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can only judge the damage of the crane tower body, but cannot realize the independent height improvement of the tower body

Method used

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  • Tower crane tower body combination method and combined tower body device
  • Tower crane tower body combination method and combined tower body device
  • Tower crane tower body combination method and combined tower body device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Such as Figure 6 , 7 As shown, for the same type of tower crane, the load on the upper part of the tower body is constant, while the load on the tower body will change with the height. Among them, M, P, H, and q are fixed values ​​in the same type of tower crane, and the bending moment value M of different heights of the tower body 0 It is directly related to the height L of the tower body, the closer to the foundation, the M 0 is the bending moment value at the root of the tower, such as figure 2 As shown, the root of the tower crane body, that is, the foundation tower body, is stressed, and the bending moment M borne by the tower body is 0 The greater the value of the flexural modulus W or Wx of the cross-section of the tower body is determined by the material of the main limb, that is, the size of the angle steel of the main limb, and the stress value σ borne by any cross-section of the tower body must be less than the national standard The specified allowable ...

Embodiment 2

[0082] Also, the specification model is designed as a 125tm tower crane as an example for illustration;

[0083] When the section X-X is located 9 meters away from the foundation, the main leg adopts 160x160x16 angle steel, and the section flexural modulus Wx =14034cm 3 , the material is Q355B, the allowable stress [σ]=355 / 1.34=264.9MPa; that is

[0084] Mx=(M+H×(L-x)+q×(L-x) 2 / 2)=2220+30x(45-9)+0.84x(45-9) 2 / 2=3844.32kNm

[0085] σ= Mx / Wx=(3844.32x1000)(Nm) / 14034 (cm 3 )=273.93MPa>264.9;

[0086] From the above calculation results, it can be seen that when X=9 meters, that is, when the crane tower is closer to the section of the foundation, generally speaking, the closer to the ground, the greater the bending moment M borne by the tower body, A larger main leg angle steel structure is required to meet the bending moment and load requirements. The use of 160x160x16 angle steel for the main leg angle steel cannot meet its use requirements, and a larger specification of t...

Embodiment 3

[0088] Also, the specification model is designed as a 125tm tower crane as an example for illustration;

[0089] When the section X-X is located 9 meters away from the foundation, the main leg adopts 180x180x18 angle steel, and the section flexural modulus Wx =17458.25cm 3 , the material is Q355B, the allowable stress [σ]=355 / 1.34=264.9MPa; that is

[0090] Mx=(M+H*(L-x)+q*(L-x) 2 / 2)=2220+30x(45-9)+0.84x(45-9) 2 / 2=3844.32kNm

[0091] σ= Mx / Wx=(3844.32x1000)(Nm) / 17458.25 (cm 3 )=220.2MPa<264.9=[σ];

[0092] From the above calculation results, it can be seen that when X=9 meters, that is, when the crane tower is closer to the section of the foundation, generally speaking, the closer to the ground, the greater the bending moment M borne by the tower body, A larger main leg angle steel structure is required to meet the bending moment and load requirements. The main leg angle steel can use 180x180x18 angle steel to meet its use requirements, that is, use the main leg angl...

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Abstract

The invention provides a tower crane tower body combination method and a combined tower body device. The combined tower body device comprises a foundation tower body, a reinforcing tower body and a standard tower body, the foundation tower body is formed by connecting a plurality of foundation sections, the reinforcing tower body is formed by connecting a plurality of reinforcing sections, and the standard tower body is formed by connecting a plurality of standard sections; then the foundation tower body, the reinforcing tower body and the standard tower body are sequentially stacked from bottom to top and are combined and connected into the crane tower body through main limb connecting and locking devices, the boundary dimensions and the section dimensions of the foundation section, the reinforcing section and the standard section are controlled to be consistent, hinge pins are adopted for section-to-section connection, interlocking safety pins are arranged, and the requirements of tower cranes of the same model and different installation independent heights can be met; through combination of the crane tower body combination method, the purpose of increasing the overhang height of the crane tower body can be achieved; and the interchangeability and the utilization rate of the standard sections are improved, the use frequency of the standard sections is improved to the maximum extent, waste and inventory are reduced, and social requirements for energy conservation and emission reduction are met. Market competitiveness of products is improved.

Description

Technical field: [0001] The present invention relates to the field of tower cranes, and mainly relates to the field of tower body combination method and combined connection tower device processing field of tower cranes, in particular to a tower crane tower combination method and combined tower body device. Background technique: [0002] At present, in the tower cranes that are commonly used now, in order to ensure the safety of the tower crane, the independent height of the tower crane is determined according to the strength of the standard section of the tower body, that is, the maximum installation height that the tower crane can reach before the attachment is installed. , which is called the independent height; with the rise of the tower crane, attachments need to be installed, and the suspension height above the attachments is also determined by the strength of the standard section of the tower body. With the continuous development of economy and society, there are more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/16B66C23/62F16B7/04F16B7/20
CPCB66C23/16B66C23/62F16B7/048F16B7/20
Inventor 邓建林罗斌飞晏勇斌叶南祥
Owner JIANGXI ZHONGTIAN INTELLIGENT EQUIP CO LTD
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