CN112551360B - A variable span cable-mounted crane - Google Patents
A variable span cable-mounted crane Download PDFInfo
- Publication number
- CN112551360B CN112551360B CN202011460475.0A CN202011460475A CN112551360B CN 112551360 B CN112551360 B CN 112551360B CN 202011460475 A CN202011460475 A CN 202011460475A CN 112551360 B CN112551360 B CN 112551360B
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- span
- variable
- cable
- main
- mounted crane
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- 239000000725 suspension Substances 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/10—Undercarriages or bogies, e.g. end carriages, end bogies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C21/00—Cable cranes, i.e. comprising hoisting devices running on aerial cable-ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/08—Runners; Runner bearings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The invention discloses a variable span cable-mounted crane, which can automatically perform a variable span action during construction without external force, has scientific and stable variable span action and no potential safety hazard, is suitable for mounting a suspension bridge with a variable main cable spacing, improves the practicability of the cable-mounted crane, expands the application range and provides an optimal lifting tool for mounting the suspension bridge with the variable main cable spacing.
Description
Technical Field
The invention belongs to the field of cable-mounted cranes for engineering machinery, and particularly relates to a variable-span cable-mounted crane.
Background
With the vigorous development of world bridges, suspension bridges and inclined rope bridges are widely used. At present, domestic suspension bridges and stay cables are installed by adopting cable-mounted cranes, but the variable-span cable-mounted cranes are unprecedented. Therefore, the existing cable-mounted crane does not have a span-changing function, so that the requirements of a plurality of complex engineering sites cannot be met, the application of the cable-mounted crane is limited, and the production and construction efficiency is affected.
Aiming at the problem that the existing cable-mounted crane cannot realize the span change, the invention develops the span-changing cable-mounted crane, which can automatically perform the span-changing action during construction without external force, and has obvious effects on the practicability and the application range of the cable-mounted crane.
Disclosure of Invention
The invention develops the variable-span cable crane, which can automatically perform the variable-span action during construction without external force, and has scientific and stable variable-span action and no potential safety hazard.
The utility model provides a variable span cable load crane, includes a girder 1, the middle part of girder 1 is cable load hoisting mechanism 2, the both ends of girder 1 are two spar 3; the cable carrying lifting mechanism 2 is connected with a steel strand 21 provided with a lifting appliance; a variable-span pushing mechanism 31 is arranged in the direction of the spar 3 away from the main beam 1, a transverse sliding chute 32 is arranged at the lower end of the spar 3, a transverse sliding seat 33 is matched with the transverse sliding chute 32, and the transverse sliding seat 33 is connected with the variable-span pushing mechanism 31; a walking end beam 4 is connected below the traversing slide seat 33, the walking end beam 4 comprises a supporting beam 41 and a plurality of groups of walking wheels 42, the supporting beam 41 is fixedly connected with the traversing slide seat 33, and the walking wheels 42 are arranged below the supporting beam 41; the running wheels 42 are above the suspension bridge main cable 5 and cooperate with the running.
Further, the walking end beam 4 is hinged with the traversing sliding seat 33 by a pin shaft.
Further, the running wheels 42 are 4 groups.
Further, the span-changing pushing mechanism 31 is a traversing cylinder.
Furthermore, the span-changing pushing mechanism 31 uses a synchronous control platform, so that the safety and stability of the span changing can be improved.
The design should ensure that when the advancing distance of the walking end beam 4 is L, the maximum safe transverse pushing or transverse pulling distance d of the variable-span pushing mechanism 31 should be kept to be d/L less than or equal to 3/100.
Further, a displacement space is provided between the running wheel 42 and the main cable 5, so that during running, the displacement of the running wheel 42 relative to the main cable 5 is ensured to be within the displacement space when the span is changed. This design helps to improve the safety and stability of the variable span, and when the travel end beam 4 advances for a distance L, the maximum safety transverse pushing or transverse pulling distance d of the variable span pushing mechanism 31 should be kept d/L less than or equal to 5/100.
Furthermore, the walking end beam 4 and the main beam 1 adopt an oblique design, and the oblique angle is set to be (the included angle between the tangent line of the main cable 5 and the main beam 1 at the maximum span+the included angle between the tangent line of the main cable 5 and the main beam 1 at the minimum span)/2. This design helps to improve the safety and stability of the variable span, and when the travel end beam 4 advances for a distance L, the maximum safety transverse pushing or transverse pulling distance d of the variable span pushing mechanism 31 should be kept d/L less than or equal to 6/100.
Further, a circle of flange 421 is provided in the middle of the running wheel 42, and the main cable 5 is provided with a groove 51 matching with the flange 421. The design can further improve the safety and stability during the span changing, and when the advancing distance of the walking end beam 4 is L, the maximum safety transverse pushing or transverse pulling distance d of the span changing pushing mechanism 31 is kept to be less than or equal to 10/100.
The invention has the beneficial effects that:
1. The invention provides the variable-span cable-mounted crane, which does not need external force, can automatically perform variable-span actions during construction, has scientific and stable variable-span actions and no potential safety hazard, is suitable for mounting suspension bridges with variable main cable spacing, improves the practicability of the cable-mounted crane, expands the application range and provides an optimal lifting tool for mounting suspension bridges with variable main cable spacing;
2. According to the invention, by arranging the transverse sliding chute, the transverse sliding seat and the span-changing pushing mechanism connected with the transverse sliding seat, the walking end beam connected with the transverse sliding seat can change the span;
3. The span-changing pushing mechanism uses a synchronous control platform, so that the span-changing cable-carrying crane disclosed by the invention is uniform in stress and stable in gravity center during span changing, and the safety and stability of the span changing can be improved;
4. the displacement space is arranged between the traveling wheel and the main cable, so that the displacement of the traveling wheel relative to the main cable is ensured to be within the displacement space when the span is changed, the traveling wheel and the main cable are not separated, and meanwhile, the transverse pushing or transverse pulling distance of the span-changing pushing mechanism can be relatively lifted, so that the safety and stability when the span is changed and the span-changing efficiency are improved;
5. The walking end beam and the main beam adopt an oblique crossing design, and the oblique crossing angle is set to be (an included angle between a tangent line of the main cable 5 and the main beam 1 when the span is maximum and an included angle between the tangent line of the main cable 5 and the main beam 1 when the span is minimum)/2, so that the design is beneficial to improving the transverse pushing or transverse pulling distance of the variable-span pushing mechanism, and the safety and stability when the span is changed and the efficiency of the variable span are improved;
6. The middle part of the traveling wheel is provided with a circle of flange, the main cable is provided with a groove matched with the flange, and when the span is changed, the traveling wheel is tightly connected with the main cable, and the design can further improve the transverse pushing or transverse pulling distance of the span-changing pushing mechanism, so that the safety and stability during the span changing and the span changing efficiency are improved.
Drawings
FIG. 1 is a general view of a variable span cable jack of the present invention;
FIG. 2 is an assembled view of the traverse chute and traverse carriage of the present invention;
FIG. 3 is a cross-sectional view of a traversing chute of the present invention;
FIG. 4 is a cross-sectional view of a traversing carriage of the present invention;
FIG. 5 is a state diagram of the travel end beam of the present invention traveling an L-time varying span;
FIG. 6 is a working diagram of the walking end beam and main cable of embodiment 1 of the present invention;
FIG. 7 is a working diagram of the walking end beam and main cable of embodiment 2 of the present invention;
FIG. 8 is an oblique view of the walking end beam and main beam of embodiment 3 of the present invention;
FIG. 9 is a schematic view of the angle between the tangent line of the main cable and the main beam of the variable-span cable truck of the present invention at maximum span;
FIG. 10 is an enlarged view of the angle between the tangent line of the main cable and the main beam when the cable truck with variable span of the present invention has the maximum span;
FIG. 11 is a schematic view of the angle between the tangent line of the main cable and the main beam when the cable truck with variable span is at the minimum span;
FIG. 12 is an enlarged view of the angle between the tangent line of the main cable and the main beam at the minimum span of the variable span cable truck of the present invention;
FIG. 13 is a working diagram of the traveling wheel and main cable according to embodiment 4 of the present invention;
In the figure, a 1-main beam, a 2-cable carrying lifting mechanism, a 21-steel stranded wire, a 3-spar, a 31-span changing pushing mechanism, a 32-traversing chute, a 33-traversing slide seat, a 4-walking end beam, a 41-supporting beam, a 42-walking wheel, a 421-flange, a 5-main cable and a 51-groove
Detailed Description
Example 1
A variable-span cable-driven crane, as shown in figure 1, comprises a main beam 1, wherein the middle part of the main beam 1 is provided with a cable-driven lifting mechanism 2, and two ends of the main beam 1 are provided with two wing beams 3; the cable carrying lifting mechanism 2 is connected with a steel strand 21 provided with a lifting appliance; a variable-span pushing mechanism 31 is arranged in the direction of the spar 3 away from the main beam 1, a transverse sliding chute 32 is arranged at the lower end of the spar 3, as shown in fig. 3, a transverse sliding seat 33 is matched with the transverse sliding chute 32, as shown in fig. 4, and the transverse sliding seat 33 is connected with the variable-span pushing mechanism 31; a walking end beam 4 is connected below the traversing slide seat 33, the walking end beam 4 comprises a supporting beam 41 and a plurality of groups of walking wheels 42, the supporting beam 41 is fixedly connected with the traversing slide seat 33, and the walking wheels 42 are arranged below the supporting beam 41; the running wheels 42 are above the suspension bridge main cable 5 and cooperate with the running.
The walking end beam 4 is hinged with the traversing slide seat 33 by adopting a pin shaft, the walking wheels 42 are 4 groups, and the span-changing pushing mechanism 31 is a traversing oil cylinder.
The span-changing pushing mechanism 31 uses a synchronous control platform, so that the safety and stability of the span changing can be improved.
When the cross-over pushing mechanism 31 is needed to change the cross-over, the connected cross sliding seat 33 is pushed or pulled transversely, and the cross sliding seat 33 moves in the cross sliding chute 32, as shown in fig. 2; meanwhile, the traveling end beam 4 connected with the transverse sliding seat 33 has the action of pushing out or folding in, and as the main cable 5 is tightly clamped with the traveling wheel 42 of the traveling end beam 4, the main cable 5 has a certain clamping effect, as shown in fig. 6, and the main cable 5 pushes out or folding in along with the action of the traveling end beam 4, thereby achieving the effect of changing the span. After the span change is completed, the cable-carried lifting mechanism performs lifting through the steel stranded wires.
As shown in fig. 5, when the variable-span cable-operated crane described above is operated, the span in the initial state is B1, the transverse pulling distance is d by the transverse pulling operation of the variable-span pushing mechanism 31, and after the variable-span cable-operated crane advances by L distance, the state is B2, in which:
d＝(B1-B2)/2
Through a great number of experiments, when the span-changing cable-driven crane works in a span-changing mode, and the advancing distance of the walking end beam 4 is L, the maximum safe transverse pushing or transverse pulling distance d of the span-changing pushing mechanism 31 is kept to be less than or equal to 3/100. In the range, the main cable cannot be separated from the limit of the travelling wheel, and the span-changing action is stable and safe.
Example 2
On the basis of embodiment 1, a displacement space is provided between the traveling wheel 42 and the main cable 5, so that during traveling, the displacement of the traveling wheel 42 relative to the main cable 5 is ensured to be within the displacement space during the span changing, as shown in fig. 7.
The design of the running wheel and the main cable in the embodiment 1, which are tightly matched, is changed, and a deflection space is arranged between the running wheel and the main cable, so that the design is beneficial to improving the safety and stability during the span changing.
Through a great number of experiments, when the span-changing cable-driven crane works in a span-changing mode, and the advancing distance of the walking end beam 4 is L, the maximum safe transverse pushing or transverse pulling distance d of the span-changing pushing mechanism 31 is kept to be less than or equal to 5/100. Compared with the embodiment 1, the main cable of the embodiment is less prone to being separated from the limit of the travelling wheel, so that the maximum safe transverse pushing or transverse pulling distance of the variable-span pushing mechanism is correspondingly improved.
Example 3
On the basis of embodiment 1, the walking end beam 4 and the main beam 1 are in an oblique design, and the oblique angle is set to be (an included angle between a tangent line of the main cable 5 and the main beam 1 at the maximum span+an included angle between the tangent line of the main cable 5 and the main beam 1 at the minimum span)/2.
As shown in fig. 8, the inclined angle θ between the walking end beam 4 and the main beam 1 is the same;
As shown in fig. 9 and 10, the included angle between the tangent line of the main cable 5 and the main beam 1 is alpha when the main cable is at the maximum span;
as shown in fig. 11 and 12, the included angle between the tangent line of the main cable 5 and the main beam 1 is beta when the main cable is at the minimum span;
Setting:
θ＝(α+β)/2
the design reduces the transverse displacement of the main cable relative to the walking end beam, reduces the transverse stress of the main cable during the span changing, and is beneficial to improving the safety and stability during the span changing.
Through a great number of experiments, when the span-changing cable-driven crane works in a span-changing mode, and the advancing distance of the walking end beam 4 is L, the maximum safe transverse pushing or transverse pulling distance d of the span-changing pushing mechanism 31 is kept to be less than or equal to 6/100.
Example 4
On the basis of embodiment 1, in the variable span cable crane, a circle of flanges 421 are arranged in the middle of the travelling wheel 42, and the main cable 5 is provided with grooves 51 matched with the flanges 421, as shown in fig. 13.
The design can greatly promote the restraint effect of the traveling wheel on the main cable, so that the main cable is more stable when the span is changed, and the safety and the stability when the span is changed can be greatly improved.
Through a great number of experiments, when the span-changing cable-driven crane works in a span-changing mode, and the advancing distance of the walking end beam 4 is L, the maximum safe transverse pushing or transverse pulling distance d of the span-changing pushing mechanism 31 is kept to be less than or equal to 10/100.
Finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460475.0A CN112551360B (en) | 2020-12-11 | 2020-12-11 | A variable span cable-mounted crane |
| PCT/CN2021/107603 WO2022121320A1 (en) | 2020-12-11 | 2021-07-21 | Variable-span cable crane |
| ZA2022/07963A ZA202207963B (en) | 2020-12-11 | 2022-07-18 | Span-variable cable-mounted crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460475.0A CN112551360B (en) | 2020-12-11 | 2020-12-11 | A variable span cable-mounted crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112551360A CN112551360A (en) | 2021-03-26 |
| CN112551360B true CN112551360B (en) | 2024-11-26 |
Family
ID=75062468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011460475.0A Active CN112551360B (en) | 2020-12-11 | 2020-12-11 | A variable span cable-mounted crane |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112551360B (en) |
| WO (1) | WO2022121320A1 (en) |
| ZA (1) | ZA202207963B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551360B (en) * | 2020-12-11 | 2024-11-26 | 中铁九桥工程有限公司 | A variable span cable-mounted crane |
| CN116239005B (en) * | 2023-05-12 | 2023-07-18 | 贵州省公路工程集团有限公司 | Sideslip assembly for cable hoisting and installation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202730653U (en) * | 2012-03-29 | 2013-02-13 | 中交二航局第四工程有限公司 | Wide-angle swinging and hoisting hydraulic cable-across crane |
| CN205000255U (en) * | 2015-09-10 | 2016-01-27 | 深圳市深安企业有限公司 | Fluid pressure type suspension bridge construction girder steel cable carries loop wheel machine |
| CN208413686U (en) * | 2018-07-25 | 2019-01-22 | 河南正大起重设备有限公司 | A kind of lifting beam machine becoming span |
| CN111137786A (en) * | 2020-01-14 | 2020-05-12 | 中铁九桥工程有限公司 | A universal cable-carrying crane and its method for adapting to different suspension bridges |
| CN210710380U (en) * | 2019-08-22 | 2020-06-09 | 南通杰品起重设备有限公司 | Variable-span crane |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29709304U1 (en) * | 1997-05-27 | 1997-08-07 | Hans Gerhart Transporttechnik GmbH, 69434 Brombach | Transport device with load suspension device |
| US20130047790A1 (en) * | 2011-08-29 | 2013-02-28 | Verizon Patent And Licensing Inc. | Variable-span multi-blade screwdriver |
| US8671490B1 (en) * | 2013-03-06 | 2014-03-18 | Mark Carney | Bridge span replacement system |
| CN206438353U (en) * | 2016-10-10 | 2017-08-25 | 中铁上海工程局集团有限公司 | A kind of traveling process becomes across track-laying machine automatically |
| CN206634933U (en) * | 2017-03-31 | 2017-11-14 | 陕西铁路工程职业技术学院 | A kind of subway work can continuously become across portal gantry structure |
| CN112551360B (en) * | 2020-12-11 | 2024-11-26 | 中铁九桥工程有限公司 | A variable span cable-mounted crane |
-
2020
- 2020-12-11 CN CN202011460475.0A patent/CN112551360B/en active Active
-
2021
- 2021-07-21 WO PCT/CN2021/107603 patent/WO2022121320A1/en not_active Ceased
-
2022
- 2022-07-18 ZA ZA2022/07963A patent/ZA202207963B/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202730653U (en) * | 2012-03-29 | 2013-02-13 | 中交二航局第四工程有限公司 | Wide-angle swinging and hoisting hydraulic cable-across crane |
| CN205000255U (en) * | 2015-09-10 | 2016-01-27 | 深圳市深安企业有限公司 | Fluid pressure type suspension bridge construction girder steel cable carries loop wheel machine |
| CN208413686U (en) * | 2018-07-25 | 2019-01-22 | 河南正大起重设备有限公司 | A kind of lifting beam machine becoming span |
| CN210710380U (en) * | 2019-08-22 | 2020-06-09 | 南通杰品起重设备有限公司 | Variable-span crane |
| CN111137786A (en) * | 2020-01-14 | 2020-05-12 | 中铁九桥工程有限公司 | A universal cable-carrying crane and its method for adapting to different suspension bridges |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202207963B (en) | 2022-09-28 |
| CN112551360A (en) | 2021-03-26 |
| WO2022121320A1 (en) | 2022-06-16 |
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