CN108358059A - A kind of method and application process for evaluating the adjacent main limb rigidity state of tower crane - Google Patents
A kind of method and application process for evaluating the adjacent main limb rigidity state of tower crane Download PDFInfo
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- CN108358059A CN108358059A CN201810027418.XA CN201810027418A CN108358059A CN 108358059 A CN108358059 A CN 108358059A CN 201810027418 A CN201810027418 A CN 201810027418A CN 108358059 A CN108358059 A CN 108358059A
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- tower crane
- tower
- adjacent main
- main limb
- tower body
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
- Jib Cranes (AREA)
Abstract
A method of the adjacent main limb rigidity state of evaluation tower crane, including：Establish the database of the adjacent main limb rigidity state of evaluation tower crane；Tower crane tower body tip displacement when tower crane tower body zero load to be evaluated is surveyed, and the adjacent main limb rigidity of tower crane is accurately searched in conjunction with the database.The present invention by detecting the displacement of tower crane tower body top four direction point in real time, and then obtain displacement characteristic value, by judging the curve graph between displacement characteristic value main limb rigidity adjacent with tower crane tower body, and then know corresponding damage position when the state of the adjacent main limb rigidity of the tower crane tower body and rigidity have damage.Application process of the present invention is not necessarily to shut down, without pasting a large amount of strain transducers on tower body tower crane, that is, avoids the winding of cable, and reduces installation and safeguard funds, conveniently know tower crane working condition whether safety, it is simple and effective.
Description
Technical field
The present invention relates to the methods and application process of a kind of adjacent main limb rigidity state of evaluation tower crane, belong to large-scale steel structure
The technical field of safety monitoring.
Background technology
Tower crane is the widely used hoisting machinery in modern construction field, once safety accident occurs, can lead to life
Property and economy are sustained a great loss.Certain accident potential can be found in time by carrying out safety monitoring to tower crane structure, avoid pacifying
The generation of full accident.In use, for tower body as main force structure, whether structure is safe, if there is company for tower crane
Tower body rigidity caused by connecting bolt loosening, structure corrosion, crackle etc. reduces, and the method various regions spy for being directed to its safety monitoring at present examines
Institute still based on regular inspection, prison inspection, technological means of use be mostly estimate, sense organ judges, shuts down measurement, magnetic powder inspection etc..Often
It advises detection means relatively to fall behind, reviewer's heavy workload, detection efficiency are low, and common detection methods are essentially all to stop
It is carried out under machine state, inspection result is difficult to reflect hoisting machinery virtual condition.
Invention content
In view of the deficiencies of the prior art, that the invention discloses a kind of algorithms is simpler, the accurately adjacent master of evaluation tower crane
The method of limb rigidity state.
The present invention also provides the application processes of the adjacent main limb rigidity state of above-mentioned evaluation tower crane.
Technical scheme is as follows：
A method of the adjacent main limb rigidity state of evaluation tower crane, including：Establish the adjacent main limb rigidity state of evaluation tower crane
Database；Tower crane tower body tip displacement when tower crane tower body zero load to be evaluated is surveyed, and is accurately searched in conjunction with the database
The adjacent main limb rigidity of tower crane.
According to currently preferred, the method for the database for establishing the adjacent main limb rigidity state of evaluation tower crane, including：
(1) when adjusting tower crane tower body zero load：Tower crane tower body structure is serviceable condition, rigidity K；
(2) when tower crane zero load, arm revolution, when arm is outside respectively along direction among four faces of tower body, acquisition is at this time
Tower crane tower body tip displacement be respectively DXa, DXb, DXc, DXd；Tower crane tower body tip displacement when enabling tower crane rigidity serviceable condition
For DX, then at this point, DXa=DXb=DXc=DXd=DX；The displacement of four points measured when tower crane rigidity serviceable condition is equal
's；
(3) the adjacent main limb rigidity of the tower crane tower body is adjusted after K2, K3 ... Kn, according still further to step (2), to record respectively
Tower crane tower body tip displacement corresponding to same rigidity：
When the adjacent main limb rigidity of tower crane tower body be K2 when, the tower crane tower body tip displacement be respectively DX2a, DX2b,
DX2c、DX2d；
When the adjacent main limb rigidity of tower crane tower body be K3 when, the tower crane tower body tip displacement be respectively DX3a, DX3b,
DX3c、DX3d；
……
When the adjacent main limb rigidity of tower crane tower body be Kn when, the tower crane tower body tip displacement be respectively DXna, DXnb,
DXnc、DXnd；
(4) each rigidity corresponding tower crane tower body top maximum displacement in selecting step (3), is denoted as：DX2、DX3……
DXn, and the direction corresponding to above-mentioned maximum displacement is recorded simultaneously；
(5) displacement characteristic value corresponding with stiffness K n is calculated：(DXn-DX)/DX；
Draw the curve graph of the displacement characteristic value and corresponding rigidity：The abscissa of the curve graph is the value of Kn/K, institute
The ordinate for stating curve graph is the displacement characteristic value.
According to currently preferred, tower crane tower body tip displacement when surveying tower crane tower body zero load to be evaluated, and tie
The method that the database accurately searches the adjacent main limb rigidity of tower crane is closed, including：
(6) arm is respectively along the top position among four faces of tower body when direction when surveying tower crane tower body zero load to be evaluated
It moves, face where the corresponding adjacent main limb of record top maximum displacement, record top maximum displacement is DK；
(7) extraction displacement characteristic value (DK-DX)/DX；
(8) according to the curve graph of step (5) described displacement characteristic value and corresponding rigidity, (DK- described in finding step (7)
DX thus the corresponding Kn/K values of)/DX solve the adjacent main limb of the tower crane tower body and correspond to stiffness K K.
According to currently preferred, the displacement of displacement sensor tower crane tower body is utilized.Measure the sensing of tower body displacement
Device is mounted on slewing tower.
As above the application process of the adjacent main limb rigidity state of commentary valence tower crane, including:It is rigid to preset the adjacent main limb of tower crane tower body
Spend damage alarming value L, the early warning value L=K*a；Wherein, 0.1≤a≤0.9；
As the adjacent main limb stiffness K K >=L of the tower crane tower body, judge that the adjacent main limb of the tower crane tower body is in safe model
It encloses；As the adjacent main limb stiffness K K of the tower crane tower body<When L, judge that the adjacent main limb of the tower crane tower body is in stiffness injury's range.
According to currently preferred, 0.3≤a≤0.7.
According to currently preferred, the application process of the adjacent main limb rigidity state of the evaluation tower crane further includes：Determine phase
Adjacent main limb face is stiffness injury face：
Judge that the adjacent main limb face corresponding to the maximum displacement of top is stiffness injury face.
Advantage of the invention is that:
The present invention obtains displacement characteristic value by detecting the displacement of tower crane tower body top four direction point in real time, leads to
The curve graph between judgement displacement characteristic value main limb rigidity adjacent with tower crane tower body is crossed, and then knows the adjacent master of the tower crane tower body
The state and rigidity of limb rigidity corresponding damage position when having a damage.Application process of the present invention be not necessarily to tower crane shut down,
Without pasting a large amount of strain transducers on tower body, that is, the winding of cable is avoided, and reduce installation and safeguard funds, conveniently soon
Whether the prompt working condition for knowing tower crane is safe, simple and effective.
Description of the drawings
Fig. 1 is the location drawing of four faces of the main limb of tower crane tower body and arm；
The tower body tip displacement figure that Fig. 2 is the faces tower body main limb a when having damage；
Fig. 3 is the curve graph of tower body tip displacement characteristic value and corresponding rigidity.
Specific implementation mode
The present invention is described in detail with reference to embodiment and Figure of description, but not limited to this.
Displacement sensor is installed on the horizontal web member centre position of tower crane slewing tower, is existed for acquiring tower crane tower body top
When tower crane zero load, horizontal displacement of institute's displacement sensors acquisition tower body top in four direction.
As shown in Figs. 1-3.
Embodiment 1,
A method of the adjacent main limb rigidity state of evaluation tower crane, including：Establish the adjacent main limb rigidity state of evaluation tower crane
Database；Tower crane tower body tip displacement when tower crane tower body zero load to be evaluated is surveyed, and is accurately searched in conjunction with the database
The adjacent main limb rigidity of tower crane.
The method of the database for establishing the adjacent main limb rigidity state of evaluation tower crane, including：
(1) when adjusting tower crane tower body zero load：Tower crane tower body structure is serviceable condition, rigidity K=2.2E8N/m；
(2) when tower crane zero load, arm revolution, when arm is outside respectively along direction among four faces of tower body, acquisition is at this time
Tower crane tower body tip displacement be respectively DXa, DXb, DXc, DXd；Tower crane tower body tip displacement when enabling tower crane rigidity serviceable condition
For DX, then at this point, DXa=DXb=DXc=DXd=DX=0.04m；The position of four points measured when tower crane rigidity serviceable condition
Shifting is equal；
(3) it adjusts after the adjacent main limb rigidity of the tower crane tower body is K2, K3, K4, K5, K6, K7, K8, K9, K10, according still further to
Step (2) records the tower crane tower body tip displacement corresponding to same rigidity respectively, wherein：
K2=K* (9/10), K3=K* (8/10), K4=K* (7/10), K5=K* (6/10), K6=K* (5/10), K7=
K* (4/10), K8=K* (3/10), K9=K* (2/10), K10=K* (1/10)；
When the adjacent main limb rigidity of tower crane tower body be K2 when, the tower crane tower body tip displacement be respectively DX2a, DX2b,
DX2c、DX2d；
When the adjacent main limb rigidity of tower crane tower body be K3 when, the tower crane tower body tip displacement be respectively DX3a, DX3b,
DX3c、DX3d；
……
When the adjacent main limb rigidity of tower crane tower body be K10 when, the tower crane tower body tip displacement be respectively DX10a, DX10b,
DX10c、DX10d；
(4) each rigidity corresponding tower crane tower body top maximum displacement in selecting step (3), is denoted as：DX2=0.0457m,
DX3=0.0529m ... DX10=0.5058m, and the direction corresponding to above-mentioned maximum displacement is recorded simultaneously；
(5) displacement characteristic value corresponding with stiffness K n is calculated：(DXn-DX)/DX；Such as the corresponding displacement characteristic values of K10
(DX10-DX)/DX=(0.5058-0.04)/0.04=11.645；Draw the curve graph of this feature value and corresponding rigidity；
Draw the curve graph of the displacement characteristic value and corresponding rigidity：The abscissa of the curve graph is the value of Kn/K, institute
The ordinate for stating curve graph is the displacement characteristic value.
Tower crane tower body tip displacement when actual measurement tower crane tower body zero load to be evaluated, and accurately looked into conjunction with the database
The method for looking for the adjacent main limb rigidity of tower crane, including：
(6) arm is respectively along the top position among four faces of tower body when direction when surveying tower crane tower body zero load to be evaluated
It moves, face where the corresponding adjacent main limb of record top maximum displacement, record top maximum displacement is DK；
(7) extraction displacement characteristic value (DK-DX)/DX；
(8) according to the curve graph of step (5) described displacement characteristic value and corresponding rigidity, (DK- described in finding step (7)
DX thus the corresponding Kn/K values of)/DX solve the adjacent main limb of the tower crane tower body and correspond to stiffness K K.
Embodiment 2,
The application process of the adjacent main limb rigidity state of evaluation tower crane as described in Example 1, including:Default tower crane tower body is adjacent
Main limb stiffness injury early warning value L, the early warning value L=K*a；Wherein, 0.1≤a≤0.9；
As the adjacent main limb stiffness K K >=L of the tower crane tower body, judge that the adjacent main limb of the tower crane tower body is in safe model
It encloses；As the adjacent main limb stiffness K K of the tower crane tower body<When L, judge that the adjacent main limb of the tower crane tower body is in stiffness injury's range.
Embodiment 3,
The application process of the adjacent main limb rigidity state of evaluation tower crane as described in Example 2, difference lies in the 0.3≤a
≤0.7。
Embodiment 4,
The application process of the adjacent main limb rigidity state of evaluation tower crane further includes as described in Example 2：Determine adjacent main limb face
As stiffness injury face：Judge that the adjacent main limb face corresponding to the maximum displacement of top is stiffness injury face.
Claims (7)
1. a kind of method for evaluating the adjacent main limb rigidity state of tower crane, which is characterized in that the method includes：Establish evaluation tower crane
The database of adjacent main limb rigidity state；Tower crane tower body tip displacement when tower crane tower body zero load to be evaluated is surveyed, and combines institute
It states database and accurately searches the adjacent main limb rigidity of tower crane.
2. a kind of method for evaluating the adjacent main limb rigidity state of tower crane according to claim 1, which is characterized in that described to build
The method of the vertical database for evaluating the adjacent main limb rigidity state of tower crane, including：
(1) when adjusting tower crane tower body zero load：Tower crane tower body structure is serviceable condition, rigidity K；
(2) when tower crane zero load, arm revolution acquires tower at this time when arm is outside respectively along direction among four faces of tower body
Machine tower body tip displacement is respectively DXa, DXb, DXc, DXd；Tower crane tower body tip displacement is DX when enabling tower crane rigidity serviceable condition,
Then at this point, DXa=DXb=DXc=DXd=DX；
(3) the adjacent main limb rigidity of the tower crane tower body is adjusted after K2, K3 ... Kn, according still further to step (2), to record respectively same
Tower crane tower body tip displacement corresponding to rigidity：
When the adjacent main limb rigidity of tower crane tower body be K2 when, the tower crane tower body tip displacement be respectively DX2a, DX2b, DX2c,
DX2d；
When the adjacent main limb rigidity of tower crane tower body be K3 when, the tower crane tower body tip displacement be respectively DX3a, DX3b, DX3c,
DX3d；
……
When the adjacent main limb rigidity of tower crane tower body be Kn when, the tower crane tower body tip displacement be respectively DXna, DXnb, DXnc,
DXnd；
(4) each rigidity corresponding tower crane tower body top maximum displacement in selecting step (3), is denoted as：DX2, DX3 ... DXn, and
The direction corresponding to above-mentioned maximum displacement is recorded simultaneously；
(5) displacement characteristic value corresponding with stiffness K n is calculated：(DXn-DX)/DX；
Draw the curve graph of the displacement characteristic value and corresponding rigidity：The abscissa of the curve graph is the value of Kn/K, the song
The ordinate of line chart is the displacement characteristic value.
3. a kind of method for evaluating the adjacent main limb rigidity state of tower crane according to claim 1, which is characterized in that the reality
Tower crane tower body tip displacement when tower crane tower body zero load to be evaluated is surveyed, and the adjacent main limb of tower crane is accurately searched in conjunction with the database
The method of rigidity, including：
(6) arm is respectively along the tip displacement among four faces of tower body when direction, note when surveying tower crane tower body zero load to be evaluated
Face where recording the corresponding adjacent main limb of top maximum displacement, record top maximum displacement is DK；
(7) extraction displacement characteristic value (DK-DX)/DX；
(8) according to the curve graph of step (5) described displacement characteristic value and corresponding rigidity, (DK-DX) described in finding step (7)/
Thus the corresponding Kn/K values of DX solve the adjacent main limb of the tower crane tower body and correspond to stiffness K K.
4. a kind of method for evaluating the adjacent main limb rigidity state of tower crane according to claim 1, which is characterized in that utilize position
Displacement sensor measures the displacement of tower crane tower body.
5. a kind of application process of the adjacent main limb rigidity state of evaluation tower crane, which is characterized in that the application process includes:It is default
Tower crane tower body adjacent main limb stiffness injury early warning value L, the early warning value L=K*a；Wherein, 0.1≤a≤0.9；
As the adjacent main limb stiffness K K >=L of the tower crane tower body, judge that the adjacent main limb of the tower crane tower body is in safe range；When
The adjacent main limb stiffness K K of the tower crane tower body<When L, judge that the adjacent main limb of the tower crane tower body is in stiffness injury's range.
6. according to a kind of application process of the adjacent main limb rigidity state of evaluation tower crane of claim 5, which is characterized in that described 0.3
≤a≤0.7。
7. according to a kind of application process of the adjacent main limb rigidity state of evaluation tower crane of claim 5, which is characterized in that the evaluation
The application process of the adjacent main limb rigidity state of tower crane further includes：Determine that adjacent main limb face is stiffness injury face：
Judge that the adjacent main limb face corresponding to the maximum displacement of top is stiffness injury face.
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| CN104030178A (en) * | 2014-06-12 | 2014-09-10 | 山东富友慧明测控设备有限公司 | Method for determining pretightening force of adjacent main limb bolts of tower crane by utilizing locus characteristics of top end of tower crane and application thereof |
| DE102015003981A1 (en) * | 2015-03-26 | 2016-09-29 | Liebherr-Werk Biberach Gmbh | Crane boom assembly |
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Application publication date: 20180803 |