CN111483921A - Load test device and test method for hoisting equipment with quasi-diamond structure - Google Patents
Load test device and test method for hoisting equipment with quasi-diamond structure Download PDFInfo
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- CN111483921A CN111483921A CN202010325994.XA CN202010325994A CN111483921A CN 111483921 A CN111483921 A CN 111483921A CN 202010325994 A CN202010325994 A CN 202010325994A CN 111483921 A CN111483921 A CN 111483921A
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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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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a load test device and a test method for lifting equipment with a similar diamond structure, which relate to the field of lifting equipment test, wherein the device comprises upright lifting equipment and inverted lifting equipment, the upright lifting equipment comprises a first metal supporting structure, a first lifting mechanism and a first lifting appliance which are sequentially connected, the inverted lifting equipment comprises a second metal supporting structure and a second lifting appliance which are mutually connected, one end of the first lifting appliance is connected with the second lifting appliance, the other end of the first lifting appliance is connected with a test heavy object, and the first lifting appliance is used as a lever structure; first metal bearing structure includes the first tie-beam of middle fulcrum, and second metal bearing structure includes middle fulcrum second tie-beam, and a counter-force roof beam is connected to the bottom of first tie-beam, and the second tie-beam is located the outside and the bottom of first tie-beam and is connected with the counter-force roof beam, and first metal bearing structure, second metal bearing structure use the counter-force roof beam to be the intersection structure for the intersect. The invention can reduce the load test cost.
Description
Technical Field
The invention relates to the field of hoisting equipment testing, in particular to a load testing device and a load testing method for hoisting equipment with a rhombus-like structure.
Background
The quasi-diamond structure hoisting equipment generally comprises a support and a hoisting mechanism, wherein the support is a diamond frame, a triangular structure or a linear beam, the quasi-diamond structure hoisting equipment is simple in structure and good in hoisting performance, and is widely applied to large-scale projects such as bridges and railways, for example, a rhombic bridge deck crane which is generally used for bridging is supported and anchored on a bridge which is erected when in use, so that the hoisting of a segmental bridge to be erected is realized.
Before the hoisting equipment leaves a factory, a 100% heavy load test or even an overload test is usually carried out to check whether the capacity of the hoisting equipment meets the design requirement, when the test is carried out, a fulcrum and an anchor point are usually required to be arranged in the factory, and a test heavy object is prepared, when the hoisting capacity of the hoisting equipment is hundreds of tons or even thousands of tons, the fulcrum position is required to be piled, a supporting cross beam is required to be manufactured to provide a strong support, piling is also required to be carried out at the rear anchor point, or a tray is required to be manufactured, the anchoring effect is realized through the weight, in addition, the test load equivalent to the weight of the hoisting capacity is required to be prepared, the test efficiency is lower, and the cost is higher.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a load test device for hoisting equipment with a rhombus-like structure, which can reduce the test cost.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a load test device for lifting equipment with a rhombus-like structure comprises two lifting equipment to be tested: the device comprises upright hoisting equipment and inverted hoisting equipment, wherein the upright hoisting equipment comprises a first metal supporting structure, a first hoisting mechanism and a first lifting appliance which are sequentially connected, the inverted hoisting equipment comprises a second metal supporting structure and a second lifting appliance which are mutually connected, one end of the first lifting appliance is connected with the second lifting appliance, and the other end of the first lifting appliance is connected with a test heavy object;
first metal bearing structure includes first tie-beam, first tie-beam lower part is first metal bearing structure's middle fulcrum, second metal bearing structure includes the second tie-beam, second tie-beam lower part is second metal bearing structure's middle fulcrum, a counter-force roof beam is connected to the bottom of first tie-beam, the second tie-beam is located the outside and the bottom of first tie-beam and is connected with the counter-force roof beam, first metal bearing structure, second metal bearing structure use the counter-force roof beam to be the intersection and be the cross structure.
Further, the distance between the second sling and the center of the first sling is smaller than the distance between the test weight and the center of the first sling, and the first sling is equivalent to a lever.
Furthermore, the end part of the first metal supporting structure far away from the first lifting appliance is connected with the second metal supporting structure through the first supporting frame and supports each other.
A test method based on a load test device for lifting equipment with a rhombus-like structure comprises the following steps:
the first hoisting mechanism is started to lift the first hoisting mechanism, the first hoisting mechanism transmits the pulling force to the second hoisting mechanism and the test heavy object, when the test heavy object is lifted, the pulling force of the first hoisting mechanism can be calculated according to the weight of the test heavy object, and because the distance from the connecting point of the first hoisting mechanism and the first hoisting mechanism to the second hoisting mechanism is far smaller than the distance from the test heavy object to the second hoisting mechanism, the weight of the test heavy object is far smaller than the pulling force of the first hoisting mechanism, namely the test load.
Compared with the prior art, the invention has the advantages that:
(1) the invention relates to a load test device for diamond-like structure hoisting equipment, which comprises upright hoisting equipment and inverted hoisting equipment, wherein the upright hoisting equipment comprises a first metal supporting structure and a first hoisting mechanism which are connected with each other, the inverted hoisting equipment comprises a second metal supporting structure and a second hoisting mechanism which are connected with each other, the position of the second metal supporting structure is obtained by rotating the first metal supporting structure for 180 degrees around a connecting fulcrum, the first metal supporting structure and the second metal supporting structure take the connecting fulcrum as a cross point to form a cross structure, the first metal supporting structure and the second metal supporting structure are connected at the connecting fulcrum, when in use, the first hoisting mechanism at the front end of the upright hoisting equipment is used for pulling the two pieces of hoisting equipment to carry out load test, the invention changes the tested load into the internal force between the two pieces of hoisting equipment, the invention fully utilizes the structural members of the cranes, can complete the load test by only manufacturing a small number of auxiliary structures and connecting structures, and has the advantages of convenient operation, low cost and high efficiency.
(2) In order to accurately know the tension (namely test load) of the first hoisting mechanism, the method can weigh the tension of the hoisting mechanism by preparing a small amount of test heavy objects by utilizing the lever principle, and meanwhile, the hoisting mechanism can also perform a small amount of lifting and descending actions so as to test the action performance of the hoisting mechanism; when an overload test is carried out, a small amount of test heavy objects are added at the rear end of the upright hoisting equipment so as to avoid overlarge stress of the diamond structure of the inverted hoisting equipment; or the movable pulley block of the first hoisting mechanism can be directly connected with the second hoisting tool of the reversed hoisting equipment, so that the two groups of hoisting mechanisms are stressed consistently, the acting force of the whole test device on the foundation is small, and complex foundation treatment is not needed; meanwhile, the lever principle is utilized, and a large load can be provided only by preparing a small amount of heavy objects, so that a load test with a large tonnage is completed.
Drawings
Fig. 1 is a schematic structural diagram of a load testing device for a lifting apparatus with a diamond-like structure in an embodiment of the present invention.
Fig. 2 is a sectional view taken along a-a of fig. 1.
In the figure: 1-upright hoisting equipment, 2-inverted hoisting equipment, 3-first metal supporting structure, 4-first hoisting mechanism, 5-second metal supporting structure, 6-second hoisting device, 8-first supporting frame, 9-second connecting beam, 10-first hoisting device, 11-counter-force beam, 12-test heavy object, 13-first lifting beam, 14-first bottom beam, 15-first connecting beam, 16-second lifting beam, 17-second supporting frame, 18-first inclined support, 19-second inclined pull rod, 20-first inclined pull rod and 21-second inclined support.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides a load testing apparatus for a lifting device with a diamond-like structure, including two lifting devices to be tested: the device comprises an upright lifting device 1 and an inverted lifting device 2 (wherein a tested object is upright, and the other lifting device is inverted and used as a test tool), the upright lifting device 1 comprises a first metal supporting structure 3, a first lifting mechanism 4 and a first lifting appliance 10 which are sequentially connected, the inverted lifting device 2 comprises a second metal supporting structure 5 and a second lifting appliance 6 which are connected with each other, one end of the first lifting appliance 10 is connected with the second lifting appliance 6, and the other end of the first lifting appliance is connected with a test weight 12.
The distance between the second spreader 6 and the centre of the first spreader 10 is smaller than the distance between the test weight 12 and the centre of the first spreader 10, the first spreader 10 corresponding to a lever.
The end part of the first metal supporting structure 3 far away from the first lifting appliance 10 is connected with the second metal supporting structure 5 through the first supporting frame 8 and supports the first metal supporting structure 5, and the second metal supporting structure 5 is obtained by rotating the first metal supporting structure 3 for 180 degrees around a fulcrum.
Referring to fig. 1, the first metal supporting structure 3 includes a first lifting beam 13 and a first bottom beam 14 which are oppositely disposed, a first connecting beam 15, a first inclined strut 18 and a first inclined strut 20 are disposed between the first lifting beam 13 and the first bottom beam 14, and the first lifting mechanism 4 is disposed at an end of the first lifting beam 13.
The second metal supporting structure 5 comprises a second lifting beam 16 and a second supporting frame 17 which are oppositely arranged, a second connecting beam 9, a second diagonal draw bar 19 and a second diagonal support 21 are arranged between the second lifting beam 16 and the second supporting frame 17, and the second hanger 6 is arranged below the second lifting beam 16; the second metal supporting structures 5 are disposed at both sides of the first metal supporting structure 3 and supported by the second supporting frames 17.
The lower part of the first connecting beam 15 is a middle pivot of the first metal supporting structure 3, the lower part of the second connecting beam 9 is a middle pivot of the second metal supporting structure 5, a reaction beam 11 is connected below the first connecting beam 15, and the second connecting beam 9 is connected to the reaction beam 11 through a connecting piece, namely the first metal supporting structure 3 and the second metal supporting structure 5 are in a cross structure by taking the reaction beam 11 as a cross point.
The invention also provides a test method of the load test device for the lifting equipment with the similar diamond structure, which comprises the following steps: the first lifting mechanism 4 is started, so that the first lifting appliance 10 connected with the first lifting mechanism 4 rises, the first lifting appliance 10 transmits the tensile force to the second lifting appliance 6 and the test heavy object 12, when the test heavy object 12 is lifted, the tensile force of the first lifting mechanism 4 can be calculated according to the weight of the test heavy object 12, and because the distance from the connecting point of the first lifting appliance 4 and the first lifting appliance 10 to the second lifting appliance 6 is far less than the distance from the test heavy object 12 to the second lifting appliance 6, the weight of the test heavy object is far less than the tensile force of the first lifting mechanism 4, namely the test load.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (4)
1. The utility model provides a load test device for class rhombus structure hoisting equipment which characterized in that: the device comprises two hoisting devices to be tested: the device comprises an upright lifting device (1) and an inverted lifting device (2), wherein the upright lifting device (1) comprises a first metal supporting structure (3), a first lifting mechanism (4) and a first lifting appliance (10) which are sequentially connected, the inverted lifting device (2) comprises a second metal supporting structure (5) and a second lifting appliance (6) which are connected with each other, one end of the first lifting appliance (10) is connected with the second lifting appliance (6), and the other end of the first lifting appliance is connected with a test heavy object (12);
first metal bearing structure (3) include first tie-beam (15), first tie-beam (15) lower part is the middle fulcrum of first metal bearing structure (3), second metal bearing structure (5) include second tie-beam (9), second tie-beam (9) lower part is the middle fulcrum of second metal bearing structure (5), a counter-force roof beam (11) is connected to the bottom of first tie-beam (15), second tie-beam (9) are located the outside and the bottom of first tie-beam (15) and are connected with counter-force roof beam (11), first metal bearing structure (3), second metal bearing structure (5) use counter-force roof beam (11) to be the intersection structure for the intersect.
2. The load test device for the hoisting equipment with the diamond-like structure as claimed in claim 1, wherein: the distance between the second sling (6) and the center of the first sling (10) is smaller than the distance between the test weight (12) and the center of the first sling (10), and the first sling (10) is equivalent to a lever.
3. The load test device for the hoisting equipment with the diamond-like structure as claimed in claim 1, wherein: the end part of the first metal supporting structure (3) far away from the first lifting appliance (10) is connected with the second metal supporting structure (5) through a first supporting frame (8) and supports each other.
4. A test method based on any one of claims 1 to 3 and a load test device for lifting equipment with a diamond-like structure is characterized in that: the method comprises the following steps:
the first hoisting mechanism (4) is started to lift the first hoisting mechanism (10), the first hoisting mechanism (10) transmits the tensile force to the second hoisting mechanism (6) and the test heavy object (12), when the test heavy object (12) is lifted, the tensile force of the first hoisting mechanism (4) can be calculated according to the weight of the test heavy object (12), and because the distance from the connecting point of the first hoisting mechanism (4) and the first hoisting mechanism (10) to the second hoisting mechanism (6) is far less than the distance from the test heavy object (12) to the second hoisting mechanism (6), the weight of the test heavy object is far less than the tensile force of the first hoisting mechanism (4), namely the test load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325994.XA CN111483921B (en) | 2020-04-23 | 2020-04-23 | Load test device and test method for hoisting equipment with quasi-diamond structure |
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| CN202010325994.XA CN111483921B (en) | 2020-04-23 | 2020-04-23 | Load test device and test method for hoisting equipment with quasi-diamond structure |
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| CN111483921A true CN111483921A (en) | 2020-08-04 |
| CN111483921B CN111483921B (en) | 2021-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295402A (en) * | 2021-12-31 | 2022-04-08 | 水利部水工金属结构质量检验测试中心 | Winch hoist test system |
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| FR2687390A1 (en) * | 1992-02-14 | 1993-08-20 | Rs Automation Ind Sa | Device for measuring and monitoring the loading position called for by one or more lifting winches with friction drive pulleys |
| JPH06321488A (en) * | 1993-05-14 | 1994-11-22 | Kajima Corp | Crane with balance arm function |
| CN2890858Y (en) * | 2006-04-18 | 2007-04-18 | 杭州华新科技有限公司 | Lifting mechanism load test bench for crane |
| CN101219755A (en) * | 2007-12-14 | 2008-07-16 | 中铁大桥局股份有限公司 | Crane with heavy frame beam |
| CN203373014U (en) * | 2013-07-25 | 2014-01-01 | 杭州市特种设备检测院 | Static load loading apparatus of overhead and gantry crane |
| CN204434104U (en) * | 2014-11-25 | 2015-07-01 | 中船黄埔文冲船舶有限公司 | A kind of loop wheel machine test under load frock |
| CN204454309U (en) * | 2015-02-11 | 2015-07-08 | 衢州市特种设备检验中心 | A kind of rapid and convenient detects load lifting limiter equipment |
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2020
- 2020-04-23 CN CN202010325994.XA patent/CN111483921B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2687390A1 (en) * | 1992-02-14 | 1993-08-20 | Rs Automation Ind Sa | Device for measuring and monitoring the loading position called for by one or more lifting winches with friction drive pulleys |
| JPH06321488A (en) * | 1993-05-14 | 1994-11-22 | Kajima Corp | Crane with balance arm function |
| CN2890858Y (en) * | 2006-04-18 | 2007-04-18 | 杭州华新科技有限公司 | Lifting mechanism load test bench for crane |
| CN101219755A (en) * | 2007-12-14 | 2008-07-16 | 中铁大桥局股份有限公司 | Crane with heavy frame beam |
| CN203373014U (en) * | 2013-07-25 | 2014-01-01 | 杭州市特种设备检测院 | Static load loading apparatus of overhead and gantry crane |
| CN204434104U (en) * | 2014-11-25 | 2015-07-01 | 中船黄埔文冲船舶有限公司 | A kind of loop wheel machine test under load frock |
| CN204454309U (en) * | 2015-02-11 | 2015-07-08 | 衢州市特种设备检验中心 | A kind of rapid and convenient detects load lifting limiter equipment |
| CN204624963U (en) * | 2015-05-15 | 2015-09-09 | 江阴和宇船舶工程有限公司 | The heavy beam of a kind of heavy loop wheel machine load-checking lifting meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295402A (en) * | 2021-12-31 | 2022-04-08 | 水利部水工金属结构质量检验测试中心 | Winch hoist test system |
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| CN111483921B (en) | 2021-11-16 |
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