CN112129561A - Crane load test method - Google Patents
Crane load test method Download PDFInfo
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- CN112129561A CN112129561A CN202010925640.9A CN202010925640A CN112129561A CN 112129561 A CN112129561 A CN 112129561A CN 202010925640 A CN202010925640 A CN 202010925640A CN 112129561 A CN112129561 A CN 112129561A
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- weight
- floating barge
- load
- crane
- ballast water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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Abstract
The invention relates to the technical field of load tests and discloses a crane load test method which comprises the following steps that firstly, the weight proportion of a floating barge, a sling, ballast water and a weight iron is calculated according to the load weight of the load test, so that the sum of the weights of the floating barge, the sling, the ballast water and the weight iron is equal to the load weight of the load test; step two, loading ballast water and a weight iron with corresponding weight into the floating barge according to the weight ratio in the step one; and step three, connecting the crane and the floating barge through the sling, and adjusting the floating barge away from the water surface by the crane to carry out a load test. Utilize floating barge as bearing tool, carry water and place the weight bar on floating barge's deck through the injection pressure to floating barge's under-deck, in addition rigging and floating barge self weight match the heavy burden weight of hoist as a whole, avoid adopting the large-scale heavy burden frock of renting outward to carry out the counter weight, have reduced test cost, also can be long-time and many times carry out the heavy burden test simultaneously, improve test efficiency.
Description
Technical Field
The invention relates to the technical field of load tests, in particular to a load test method for a crane.
Background
After the marine crane is installed and debugged, the comprehensive hoisting capacity of the crane is generally required to be evaluated to ensure that the load of the crane is not exceeded in the later use, so that the load test of the crane is an essential link.
During the load test, the load weight is generally different from several tons to hundreds of tons, even thousands of tons, and for the load test with small tonnage, the crane can be simulated by directly hanging the weight of the weight iron; the weight of tens of hundreds of tons of load can be realized by suspending the load bracket tool and the weight iron and making the total weight of the load bracket tool and the weight iron equal to the test weight.
However, in a large crane loaded with thousands of tons, the load bearing capacity of the load bracket tooling in a shipyard is limited, and the number of weights is also limited, so that it is difficult to balance the thousands of tons using the load bracket tooling and the weights. Conventionally, a large-scale load-bearing tool of an external company is rented for counterweight, but the rent is high, the test time is limited, and the cost of the load-bearing test is increased.
Disclosure of Invention
The purpose of the invention is: the crane load test method is provided for solving the problem that in the prior art, the cost is high when a large-scale load tool is rented for a large-scale crane with a large load to carry out load test.
In order to achieve the purpose, the invention provides a crane load test method, which comprises the following steps of firstly, calculating the weight proportion of a floating barge, a sling, ballast water and a weight iron according to the load weight of the load test, and enabling the sum of the weights of the floating barge, the sling, the ballast water and the weight iron to be equal to the load weight of the load test; step two, loading ballast water and a weight iron with corresponding weight into the floating barge according to the weight ratio in the step one; and step three, connecting the crane and the floating barge through the sling, and adjusting the floating barge away from the water surface by the crane to carry out a load test.
Preferably, in the second step, the weights are symmetrically arranged on the floating barge by taking the center of the floating barge as a symmetrical point.
Preferably, in step two, the ballast water is arranged in the central region of the barge.
Preferably, in the step one, the weight of the load is defined as A, the weight of the sling is defined as B, the weight of the floating empty load is defined as E, the weight of the ballast water is defined as C, the weight of the weight iron is defined as D, wherein A is more than or equal to B + E, and the weight of the ballast water is defined as C according to the full tank.
Preferably, in the third step, there are two sets of the slings, and the two sets of the slings are symmetrically arranged along the length direction of the floating barge by taking the center of the floating barge as an axis.
Preferably, in the third step, a plurality of hoisting points are arranged on the floating barge, each hoisting point is symmetrically arranged by taking the center of the floating barge as a symmetric point, and the sling is connected with each hoisting point of the floating barge.
Compared with the prior art, the crane load test method provided by the embodiment of the invention has the beneficial effects that: when carrying out the weight test to the hoist, utilize to float to refute as bearing tool, through annotating the ballast water and placing the weight bar on the deck of floating to refute to the inboard of floating, in addition rigging and the weight of floating to refute self match the weight of bearing a burden of hoist as a whole, can adjust the ballast water weight and the weight bar weight in the different cabins according to the test weight that does not use, the big-tonnage is loaded a burden experimental difficult problem of having solved effectively, avoid adopting the large-scale frock of bearing a burden of external lease to carry out the counter weight, the testing cost is reduced, also can be long-time and many times carry out the weight test simultaneously, the efficiency of the test is improved.
Drawings
FIG. 1 is a schematic structural diagram of a crane load testing method of the present invention;
FIG. 2 is a top view of the crane load testing method of FIG. 1;
FIG. 3 is a side view of the crane load testing method of FIG. 1.
In the figure, 1, hook; 2. a sling; 3. lifting lugs; 4. floating barge; 5. pressing iron; 6. ballast water.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the preferred embodiment of the crane load test method of the present invention, as shown in fig. 1 to 3, the floating barge 4 is used as a carrying tool, and the weight of the floating barge 4, the sling 2, the ballast water 6 and the weight iron 5 is matched with the load weight of the load test.
The crane load test method comprises the following steps:
step one, calculating the weight proportion of the floating barge 4, the sling 2, the ballast water 6 and the weight iron 5 according to the weight of the load in the load test, so that the sum of the weights of the floating barge 4, the sling 2, the ballast water 6 and the weight iron 5 is equal to the weight of the load in the load test.
Preferably, the weight of the load of the crane load test is defined as A, the weight of the sling 2 is defined as B, the no-load weight of the floating barge 4 is defined as E, the weight of the ballast water 6 is defined as C, the weight of the weight iron 5 is defined as D, and A is more than or equal to B + E. The weight C of the ballast water 6 is calculated in terms of tank fullness, which facilitates direct determination of the value of the weight C of the ballast water 6 from tank capacity, which facilitates accounting, and for load tests with different load weights a, tanks with different tank capacities may be selected as water tanks.
The load test is mainly carried out on a large crane with the weight of more than 1000 tons, and the weight ratio includes the following conditions according to the weight A of the load, wherein firstly, A is B + E, the weight of the load is equal to the sum of the weight of the sling 2 and the no-load weight of the floating barge 4, and the ratio of the weight of the ballast water 6 to the weight of the weight iron 5 is zero; secondly, when A is B + E + C, the weight of the load is equal to the sum of the weight of the sling 2, the no-load weight of the floating barge 4 and the full load weight of the ballast water 6, and the weight ratio of the weight iron 5 is zero; thirdly, if the weight of the loaded weight is equal to the sum of the weight of the sling 2, the no-load weight of the floating barge 4 and the weight of the weight iron 5, the proportion of the weight of the full load of the ballast water 6 is zero, and if the weight of B + E is less than or equal to A and less than or equal to B + E + C, the weight difference can be compensated by the weight-certified weight iron 5, and the tonnage of the weight iron 5 is different from 0.5 ton to 10 tons; and fourthly, A is B + C + D + E, and the weight of the load is equal to the sum of the weight of the sling 2, the unloaded weight of the floating barge 4, the weight of the full ballast water 6 and the weight of the weight iron 5.
And step two, loading ballast water 6 and a weight iron 5 with corresponding weights into the floating barge 4 according to the weight ratio in the step one. Preferably, the weights 5 are symmetrically arranged on the floating barge 4 by taking the center of the floating barge 4 as a symmetrical point, and the ballast water 6 is arranged in the central area of the floating barge 4, so that the center of mass of the floating barge 4 after being lifted can be kept at the central position, and the floating barge 4 is uniformly stressed.
And step three, connecting a lifting hook 1 and a floating barge 4 of the crane through a sling 2, and adjusting the floating barge 4 away from the water surface through the lifting hook 1 and the sling 2 by the crane to carry out a load test. Preferably, there are two sets of slings 2, and two sets of slings 2 are arranged along the length direction of the floating barge 4 with the center of the floating barge 4 as an axis symmetry, and the distance between the centers of the two sets of slings 2 is not less than half of the length of the floating barge 4, so as to avoid the floating barge 4 from deflecting after being lifted. A plurality of lifting lugs 3 are arranged on the floating barge 4, the lifting lugs 3 form lifting points connected with the lifting cables 2, each lifting point is symmetrically arranged by taking the center of the floating barge 4 as a symmetrical point, the lifting cables 2 are connected with each lifting point of the floating barge 4, the lifting lugs 3 enable the floating barge 4 to bear force in multiple points, the stability is improved, and meanwhile, the lifting lugs 3 are symmetrically arranged, so that the floating barge 4 can be ensured not to deflect after leaving the water surface.
Preferably, the load tests include a hook static load test, a lifting test, a braking test, a rotation test, and the like of the crane.
To sum up, the embodiment of the invention provides a crane load test method, when a crane is subjected to load test, a floating barge is used as a bearing tool, water is injected into a floating barge cabin and a weight iron is placed on a floating barge deck, and the weight of a rigging and the weight of the floating barge are used as a whole to match the load weight of the crane, so that the weight of the water ballast and the weight of the weight iron in different cabins can be adjusted according to different test weights, a large-scale load tool for external renting is avoided for balancing, the test cost is reduced, and meanwhile, the load test can be carried out for a long time and many times, and the test efficiency is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (6)
1. A crane load test method is characterized by comprising the following steps of firstly, calculating the weight ratio of a floating barge, a sling, ballast water and a weight iron according to the load weight of a load test, and enabling the sum of the weights of the floating barge, the sling, the ballast water and the weight iron to be equal to the load weight of the load test; step two, loading ballast water and a weight iron with corresponding weight into the floating barge according to the weight ratio in the step one; and step three, connecting the crane and the floating barge through the sling, and adjusting the floating barge away from the water surface by the crane to carry out a load test.
2. The crane load testing method according to claim 1, wherein in the second step, the weights are symmetrically arranged on the floating barge with the center of the floating barge as a symmetrical point.
3. The crane load testing method of claim 1, wherein in step two, the ballast water is disposed in a central region of the barge.
4. The crane load test method according to any one of claims 1-3, wherein in step one, the weight of the load is defined as A, the weight of the sling is defined as B, the weight of the floating barge in no load is defined as E, the weight of the ballast water is defined as C, and the weight of the weight iron is defined as D, wherein A is greater than or equal to B + E, and the weight of the ballast water C is calculated according to the full tank.
5. A crane load testing method as claimed in any one of claims 1 to 3, wherein in the third step, there are two sets of slings, and the two sets of slings are arranged in the length direction of the floating barge with the center of the floating barge as an axis symmetry.
6. The crane load test method as claimed in claim 5, wherein in step three, a plurality of suspension points are arranged on the floating barge, each suspension point is symmetrically arranged with respect to the center of the floating barge as a symmetry point, and the suspension cable is connected with each suspension point of the floating barge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010925640.9A CN112129561A (en) | 2020-09-04 | 2020-09-04 | Crane load test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010925640.9A CN112129561A (en) | 2020-09-04 | 2020-09-04 | Crane load test method |
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| CN112129561A true CN112129561A (en) | 2020-12-25 |
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| CN202010925640.9A Pending CN112129561A (en) | 2020-09-04 | 2020-09-04 | Crane load test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620198A (en) * | 2021-12-24 | 2022-06-14 | 武昌船舶重工集团有限公司 | Load test method and test tool |
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| CN109733998A (en) * | 2019-02-27 | 2019-05-10 | 上海振华重工(集团)股份有限公司 | A kind of calibration of lifting equipment weight and test mass method |
| CN111337281A (en) * | 2020-03-09 | 2020-06-26 | 招商局重工（江苏）有限公司 | Method for heavy-load test of semi-submersible type hoisting and disassembling platform |
| CN111504678A (en) * | 2020-04-26 | 2020-08-07 | 中船黄埔文冲船舶有限公司 | Floating barge for crane load test and load test method |
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2020
- 2020-09-04 CN CN202010925640.9A patent/CN112129561A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014073743A1 (en) * | 2012-11-07 | 2014-05-15 | 포코중공업(주) | Counterweight-linked floating gantry crane and vessel for returning aggregate using same |
| CN106226101A (en) * | 2016-07-30 | 2016-12-14 | 青岛蓝天创先科技服务有限公司 | A kind of folding bridge crane static load test counterweight water bag and suspension bracket |
| CN109733998A (en) * | 2019-02-27 | 2019-05-10 | 上海振华重工(集团)股份有限公司 | A kind of calibration of lifting equipment weight and test mass method |
| CN111337281A (en) * | 2020-03-09 | 2020-06-26 | 招商局重工（江苏）有限公司 | Method for heavy-load test of semi-submersible type hoisting and disassembling platform |
| CN111504678A (en) * | 2020-04-26 | 2020-08-07 | 中船黄埔文冲船舶有限公司 | Floating barge for crane load test and load test method |
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| CN114620198A (en) * | 2021-12-24 | 2022-06-14 | 武昌船舶重工集团有限公司 | Load test method and test tool |
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Application publication date: 20201225 |