CN104947955B - Load transferring method used for hydraulic lifting device replacement - Google Patents
Load transferring method used for hydraulic lifting device replacement Download PDFInfo
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- CN104947955B CN104947955B CN201410120942.3A CN201410120942A CN104947955B CN 104947955 B CN104947955 B CN 104947955B CN 201410120942 A CN201410120942 A CN 201410120942A CN 104947955 B CN104947955 B CN 104947955B
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Abstract
The invention relates to device lifting, in particular to a load lifting method of a hydraulic lifting device. According to the method, as three temporary supports are additionally arranged at lower chord joints of a roof structure, the roof structure is directly supported through the support in the middle, and two hydraulic jacks are installed at the tops of the supports on the two sides, the load on a failing lifting mechanism is safely and reliably transferred to a temporary supporting load transferring device; meanwhile, after device replacement is completed, the load is retransferred to the lifting mechanism. By means of the method, it is guaranteed that device replacement and load transferring are safely and smoothly completed in the whole process.
Description
Technical field
The present invention relates to equipment lifting, more particularly to a kind of method of hydraulic lifting device increasing productivity.
Background technology
In hydraulic pressure lift work progress, when hydraulic lifting device breaks down, conventional method is directly below structure
Single support is added, by cutting off steel strand wires unloading by root.Power on steel strand wires is very big, and roof structure has one at the strong point
Fixed deformation (amount of deflection), it is breakneck operation that load is transformed into suddenly in single support；It is exactly in addition by there is failure
Lift cylinder unload in load forced branch to support tower, unloading behaviour is carried out when lift cylinder failure, steel strand wires are stranded
Make security risk very big.
The content of the invention
Present invention seek to address that the drawbacks described above of prior art, there is provided a kind of to turn for the load that hydraulic lifting device is changed
Change method.The present invention is by jacking hydraulic jack by the safe and reliable conversion of the load of hoisting mechanism to supporting apparatus
On, it is ensured that the replacing of equipment is smoothed out.
In order to solve above-mentioned technical problem, a kind of load conversion method changed for hydraulic lifting device, under it includes
Row step：
Step one, when steel structural roof is in hydraulic pressure lift work progress, lift cylinder outlet failure cannot exclude necessary
When changing or lifting the stranded phenomenon of steel strand wires outlet, need to set up temporary support load conversion device immediately：First by hanging
Machine or hoist engine add an interim main support at roof structure lower-chord panel point, then increase by two tops in main support both sides
Rise and support, jacking support top end respectively disposes a hydraulic jack, main support to support with jacking and be linked to be entirety by anchor ear, utilize
The Auxiliary support of four direction guarantees stablizing for main support；
Step 2, after the completion of temporary support load conversion device is installed, welded, two hydraulic jacks are synchronously divided
Level loads jacking, and now the load of hoisting mechanism is passively being laid down step by step simultaneously, when steel structural roof departs from interim by jack-up
During support load conversion device, because roof structure has certain deflection deformation at the strong point, the load of hoisting mechanism is still not
Unload, now the gap in temporary support load conversion device between steel pipe support and steel structural roof lower edge adopts different-thickness
Steel plate tracking plug fill out；In the case of confirming that each several part is N/R, next stage jacking loading can be continued, until hoisting mechanism
Load when being zero, lock hydraulic lifting jack, the work of jacking load conversion is completed, the oil cylinder that starts to change hoisting mechanism or
Person lifts steel strand wires；
Step 3, after the completion of lift cylinder or lifting steel strand wires are changed, is carried by the tensioning of lift cylinder multistage loadings
Steel strand wires are risen, now the load of hydraulic jack is unloaded step by step on temporary support load conversion device, until steel structural roof
When load in disengaging steel pipe support, hydraulic jack is zero, load conversion work is fully completed, and steel structural roof recovers normally to carry
The state of liter.
The described load conversion method changed for hydraulic lifting device, in the step 2, two hydraulic pressure thousand
Jin top is synchronous to load hierarchical loading jacking according to 20%, 40%, 60%, 80%, 100% accumulation.
The described load conversion method changed for hydraulic lifting device, in the step 3, the lift cylinder is pressed
According to 20%, 40%, 60%, 80%, 100% accumulation multistage loadings, tensioning lifts steel strand wires.
By adding one group of three temporary support in roof structure lower-chord panel point, intermediate supports directly support roof system to the present invention
Two hydraulic jacks are installed at structure, supported on both sides top, will appear from that load on the hoisting mechanism of problem is safe and reliable to be turned
Shift on supporting apparatus, while after the completion of equipment replacement, and load is transformed on hoisting mechanism again, whole process guarantees to set
For replacing, load conversion safety, smoothly complete.The present invention can safely and efficiently process steel structural roof and construct in hydraulic pressure lift
During most dangerous equipment replacement when problem.
Description of the drawings
Below in conjunction with the accompanying drawings the present invention is further illustrated：
Fig. 1 is schematic diagram of the present invention.
Specific embodiment
As shown in figure 1, the present invention when steel structural roof 9 in hydraulic pressure lift work progress, the outlet failure of lift cylinder 7 without
Method is excluded when must change or lift the stranded phenomenon of the outlet of steel strand wires 8, with load conversion method of the invention by hoisting mechanism
On the safe and reliable conversion of load to temporary support load conversion device, comprise the following steps that：
Technical staff provides equipment replacement scheme, and the temporary support load conversion device of the present invention is determined by calculating analysis
The specification of each part, size, complex node carries out finite element analyses using ANSYS；
The model of hydraulic jack 5 determines：The tonnage size of jack 5 is determined according to the counter-force value of temporary support point；Root
Become according to uneven deformation value Δ and lifting steel strand wires elasticity of the temporary support point of roof structure 9 in the state that lifted and jacking state
The shortening amount Δ L of shape determines the pushing tow stroke of jack 5:
Jack pushing tow stroke=structure jacking state deformation-structure lifts state deformation（Negative value）+ steel strand wires shorten Δ L
Since when lift cylinder 7 breaks down or steel strand wires 8 there is stranded phenomenon, the safety coefficient drop of hoisting mechanism
Low, job site should be made with most fast speed, install temporary support load conversion device.
After temporary support load conversion device installation, two synchronization hierarchical loadings of hydraulic jack 5（20% accumulation
Loading）, now the load of lift cylinder 7 also laying down step by step, when steel structural roof 9 is by jack-up, in order to ensure jacking process
Stationarity, when jack is per jacking 30mm, follows and adopt between steel pipe support 1 and the lower edge of steel structural roof 11 in supporting apparatus
Filled out closely with the plug of steel plate strip 6, stretch that cylinder is long to bring unnecessary stable problem to evade jack 8.It is as good as in confirmation each several part
In the case of often, next stage jacking loading can be continued, until when liter steel strand wires 8 are lax, the load of lift cylinder 7 is zero, lock
Determine hydraulic jack 5, start to change lift cylinder 7 or lifting steel strand wires 8.
Lifting means is changed after finishing, and lifting steel strand wires is tensioned step by step by lift cylinder, now on supporting apparatus
Load in hydraulic jack 5 is laid down step by step, until the load that steel structural roof 9 departs from steel pipe 1 hydraulic jack 5 of support is
When zero, load conversion is fully completed.
Claims (3)
1. it is a kind of for hydraulic lifting device change load conversion method, it is characterised in that it comprises the following steps：
Step one, when steel structural roof is in hydraulic pressure lift work progress, lift cylinder outlet failure cannot be excluded and must changed
Or when lifting the stranded phenomenon of steel strand wires outlet, need to set up temporary support load conversion device immediately：First by loop wheel machine or
Person's hoist engine adds an interim main support at roof structure lower-chord panel point, then increases by two jackings in main support both sides
Support, jacking support top end respectively disposes a hydraulic jack, and main support is supported with jacking and is linked to be entirety by anchor ear, using four
The Auxiliary support in direction guarantees stablizing for main support；
Step 2, after the completion of temporary support load conversion device is installed, welded, synchronously classification adds two hydraulic jacks
Jacking is carried, now the load of hoisting mechanism is passively being laid down step by step simultaneously, when steel structural roof departs from temporary support lotus by jack-up
During idling changing device, because the load that roof structure has certain deflection deformation, hoisting mechanism at the strong point is not still unloaded
Complete, now the gap in temporary support load conversion device between steel pipe support and steel structural roof lower edge adopts the steel of different-thickness
Plate tracking plug is filled out；In the case of confirming that each several part is N/R, next stage jacking loading can be continued, until hoisting mechanism is negative
When load is zero, hydraulic lifting jack is locked, the work of jacking load conversion is completed, start to change the oil cylinder of hoisting mechanism or carry
Rise steel strand wires；
Step 3, after the completion of lift cylinder or lifting steel strand wires are changed, by the tensioning of lift cylinder multistage loadings steel is lifted
Twisted wire, now the load of hydraulic jack is unloaded step by step on temporary support load conversion device, until steel structural roof departs from
When load in steel pipe support, hydraulic jack is zero, load conversion work is fully completed, and steel structural roof recovers normal hoisting shape
State.
2. it is according to claim 1 for hydraulic lifting device change load conversion method, it is characterised in that the step
In rapid two, two hydraulic jacks are synchronous to load hierarchical loading jacking according to 20%, 40%, 60%, 80%, 100% accumulation.
3. it is according to claim 1 for hydraulic lifting device change load conversion method, it is characterised in that the step
In rapid three, the lift cylinder lifts steel strand wires according to 20%, 40%, 60%, 80%, 100% accumulation multistage loadings, tensioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120942.3A CN104947955B (en) | 2014-03-28 | 2014-03-28 | Load transferring method used for hydraulic lifting device replacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120942.3A CN104947955B (en) | 2014-03-28 | 2014-03-28 | Load transferring method used for hydraulic lifting device replacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104947955A CN104947955A (en) | 2015-09-30 |
| CN104947955B true CN104947955B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410120942.3A Active CN104947955B (en) | 2014-03-28 | 2014-03-28 | Load transferring method used for hydraulic lifting device replacement |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112502475B (en) * | 2020-11-27 | 2022-07-19 | 上海建工五建集团有限公司 | Supporting bearing capacity conversion device and using method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH508791A (en) * | 1968-06-28 | 1971-06-15 | Bacci Luigi | Procedure for raising a monolithic cell of a building structure at height, in particular for roofing and for the installation of the support pillars with the reciprocal connection, as well as a device for carrying out this procedure |
| CN2663585Y (en) * | 2003-10-31 | 2004-12-15 | 润弘精密工程事业股份有限公司 | Ancillary shoring component for adjusting height of precast floorslab |
| CN200964695Y (en) * | 2006-11-01 | 2007-10-24 | 北京城建集团有限责任公司 | Load conversion bracket |
| CN101666163B (en) * | 2009-09-15 | 2010-12-01 | 中冶建工有限公司 | High-altitude long-span roofing pipe truss installation method |
| CN203430059U (en) * | 2013-08-22 | 2014-02-12 | 中国十七冶集团有限公司 | Temporary fixing device used for installing large-span steel structure roof primary truss |
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2014
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