CN101590984A - Mast unbalance stress eliminating hoisting method - Google Patents
Mast unbalance stress eliminating hoisting method Download PDFInfo
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- CN101590984A CN101590984A CNA2009101116343A CN200910111634A CN101590984A CN 101590984 A CN101590984 A CN 101590984A CN A2009101116343 A CNA2009101116343 A CN A2009101116343A CN 200910111634 A CN200910111634 A CN 200910111634A CN 101590984 A CN101590984 A CN 101590984A
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- lift
- weight
- mast
- suspension centre
- suspension
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Abstract
The invention provides a kind of mast unbalance stress eliminating hoisting method, comprise that existing mast lifts the method for weight by being arranged at suspension centre on the weight, is characterized in that three suspension centres and the weight center of gravity that are provided with are in the same plane.With this lift-on/lift-off system lifting, can eliminate because of promoting asynchronously, and the weight dimensional orientation changes the variation that the suspension centre that produces lifts power.This lift-on/lift-off system is applicable to that three masts lift or take the lift heavy thing by force.And two masts do not wait lift heavy to lift or take the lift heavy thing by force.
Description
Technical field
Mast unbalance stress eliminating hoisting method (this lift-on/lift-off system, down together) belongs to the method for mast lifting weight, and exactly, it is a kind of method that mast lifted or took by force the lift heavy thing.
Background technology
A kind of method of using when the existing method of lifting is mast lifting weight, its practice is suspension centre to be set carry out lifting of weight more than the weight center of gravity, owing to promote asynchronous between mast, and the change of weight dimensional orientation, suspension centre lifts power and changes immediately, thereby when calculating lifts power,, set up the unbalance stress coefficient in order to leave necessary deposit allowance.When lifting, also to adopt an effective measure.。。
Summary of the invention
In order to eliminate that mast lifts or when taking weight by force,, specially formulate this lift-on/lift-off system because of promoting asynchronous and the weight orientation changes and produces the suspension centre power that lifts and change.The analysis mode that between reflection lifting power three elements, concerns (referring to: the math modeling [J] of the stressed control of Lin Handing hoisting and hanging, Nanjing College of Architectural Engineering's journal, 1996 (4): 72～76) as can be known, from analysis mode, stressed clear and definite mast suspension centre lifts power, equal to lift power, multiply by by hoisting rope and depart from the hoisting rope coefficient that plumb bob vertical produces by the suspension centre that the hoisting crane lifting is calculated.And the hoisting crane suspension centre lifts power, equals to lift that suspension centre lifts power when initial, and promotes asynchronous and the weight dimensional orientation changes, and produces the algebraic sum of the power that the lifts variable quantities of these those long changes that disappear between suspension centre.When 4 points (three suspension centres, weight center of gravity) when coplane is provided with, the latter is zero, so the suspension centre power of lifting is constantly equal to the power that lifts when initial that lifts.So the mast that 4 points (three suspension centres, weight center of gravity) coplane is provided with lifting, its suspension centre lifts power, also just equal by hoisting crane calculate be constantly equal to lifting when initial suspension centre lift power, multiply by the hoisting rope coefficient again.Be in the stressed clear and definite mast lifting,, then eliminated that the suspension centre of generation lifts power to be changed because of promoting asynchronous and the change of weight dimensional orientation if lifted weight thing center of gravity is positioned on the definite plane of three suspension centres (3 points).
When adopting two masts to lift weight, two suspension centres connect the back by mast lifting, and surplus next suspension centre is by another mast lifting; When adopting three masts lifting weight, the corresponding mast of each suspension centre.
This lift-on/lift-off system is applicable to that three masts lift or take the lift heavy thing by force.And two masts do not wait lift heavy to lift or take the lift heavy thing by force.
The specific embodiment
Now introduce a kind of mode:
1. on the earlier predetermined weight center of gravity with center of gravity under the suspension centre power that lifts distribute or lift the force rate value, because three suspension centres are divided into upper and lower two sides of center of gravity, then must there be a side that a suspension centre only is set, follow suspension centre of table body place's preliminary election at this side's weight, and on the extended line of this suspension centre and weight center of gravity line, lift the ratio of power by above-mentioned predetermined center of gravity upper and lower suspension centre, that determines two suspension centres of the opposing party always lifts origin of force;
2. always lift origin of force by two suspension centres and make a straight line, intersect the two-end-point place, a suspension centre (two suspension centres lift power according to it to the spacing that always lifts origin of force distribution that is inversely proportional to) respectively is set at the table body of itself and lifted weight thing;
3. definite as stated above three suspension centres (3 points), promptly in the same plane with lifted weight thing center of gravity, this be because the straight line two ends by the weight center of gravity (end is the suspension centre of preliminary election, the other end be two suspension centres of other party always lift origin of force) all on the definite plane of three suspension centres (3 points).
The suspension centre setting will be by calculating, analyzing, whether each suspension centre lifts power suitable, whether the lifted weight thing is stressed meets the requirements, that whether the present position helps lifting lifted weight thing center of gravity in the triangle that with three suspension centres is the summit is stable, and whether this table body place of weight allow to be provided with factors such as suspension centre, determines through comparative optimization.All the other are analyzed slightly.
Claims (2)
1, mast unbalance stress eliminating hoisting method comprises that existing mast is arranged at the method that the suspension centre on the weight lifted or took by force the lift heavy thing, it is characterized in that three suspension centres that are provided with, and is in the same plane with the weight center of gravity.
2, according to right 1 described mast unbalance stress eliminating hoisting method, the center of gravity of weight is positioned among the triangle that three suspension centres are the summit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101116343A CN101590984A (en) | 2009-05-05 | 2009-05-05 | Mast unbalance stress eliminating hoisting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101116343A CN101590984A (en) | 2009-05-05 | 2009-05-05 | Mast unbalance stress eliminating hoisting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101590984A true CN101590984A (en) | 2009-12-02 |
Family
ID=41405899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101116343A Withdrawn CN101590984A (en) | 2009-05-05 | 2009-05-05 | Mast unbalance stress eliminating hoisting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101590984A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588081A (en) * | 2012-08-13 | 2014-02-19 | 中国石油天然气集团公司 | Hoisting method for equipment inapplicable to conventional hoisting process |
| CN103871093A (en) * | 2012-12-07 | 2014-06-18 | 江苏省电力公司 | Method for performing three-dimensional virtual simulation transmission line tower group tower leg hoisting process |
-
2009
- 2009-05-05 CN CNA2009101116343A patent/CN101590984A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588081A (en) * | 2012-08-13 | 2014-02-19 | 中国石油天然气集团公司 | Hoisting method for equipment inapplicable to conventional hoisting process |
| CN103871093A (en) * | 2012-12-07 | 2014-06-18 | 江苏省电力公司 | Method for performing three-dimensional virtual simulation transmission line tower group tower leg hoisting process |
| CN103871093B (en) * | 2012-12-07 | 2016-12-07 | 江苏省电力公司 | The method of three-dimensional emulation electric power line pole tower group tower leg hoisting process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Open date: 20091202 |