CN112551360A - Variable-span cable-mounted crane - Google Patents
Variable-span cable-mounted crane Download PDFInfo
- Publication number
- CN112551360A CN112551360A CN202011460475.0A CN202011460475A CN112551360A CN 112551360 A CN112551360 A CN 112551360A CN 202011460475 A CN202011460475 A CN 202011460475A CN 112551360 A CN112551360 A CN 112551360A
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- China
- Prior art keywords
- span
- variable
- cable
- transverse
- walking
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
Abstract
The invention discloses a variable-span cable crane, which can automatically perform variable-span actions during construction without external force, is scientific and stable in variable-span actions and free of potential safety hazards, is suitable for mounting a suspension bridge with variable main cable intervals, improves the practicability of the cable crane, enlarges the application range and provides an optimal hoisting tool for mounting the suspension bridge with variable main cable intervals.
Description
Technical Field
The invention belongs to the field of cable loaders for engineering machinery, and particularly relates to a variable-span cable loader.
Background
With the vigorous development of bridges in the world, suspension bridges and cable-stayed bridges are widely applied. At present, the suspension bridge and the stay cable are installed by adopting a cable crane in China, but the variable-span cable crane has no precedent. Therefore, the existing cable crane does not have the function of changing span, so that the requirements of a plurality of complex engineering sites cannot be met, the application of the cable crane is limited, and the efficiency of production and construction is influenced.
Aiming at the problem that the conventional cable crane cannot realize variable span, the invention develops the variable span cable crane which does not need external force, can automatically perform variable span action during construction and has obvious effects on improving the practicability and the application range of the cable crane.
Disclosure of Invention
The invention develops the variable-span cable crane which does not need external force, can automatically perform variable-span action during construction, and has scientific and stable variable-span action and no potential safety hazard.
A variable-span cable-mounted crane comprises a main beam 1, wherein a cable-mounted hoisting mechanism 2 is arranged in the middle of the main beam 1, and two wing beams 3 are arranged at two ends of the main beam 1; the cable-loaded hoisting mechanism 2 is connected with a steel strand 21 provided with a lifting appliance; a variable-span jacking mechanism 31 is mounted on the spar 3 in the direction away from the main beam 1, a transverse sliding groove 32 is formed in the lower end of the spar 3, a transverse sliding seat 33 is matched with the transverse sliding groove 32, and the transverse sliding seat 33 is connected with the variable-span jacking mechanism 31; a walking end beam 4 is connected below the transverse sliding 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 transverse sliding seat 33, and the walking wheels 42 are arranged below the supporting beam 41; the running wheels 42 run above the main cable 5 of the suspension bridge in a matched manner.
Further, the walking end beam 4 is hinged with the transverse sliding seat 33 by a pin shaft.
Further, the running wheels 42 are 4 sets.
Further, the span-variable jacking mechanism 31 is a traversing cylinder.
Further, the variable-span pushing mechanism 31 uses a synchronous control platform, so that the safety and the stability of the variable span can be improved.
The design ensures 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 is kept to be d/L less than or equal to 3/100.
Furthermore, a displacement space is arranged between the walking wheels 42 and the main cable 5, and during the walking process, when the span is changed, the displacement of the walking wheels 42 relative to the main cable 5 is ensured to be in the displacement space. The design is favorable for improving the safety and the stability during the span change, and when 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 jacking mechanism 31 is kept to be d/L less than or equal to 5/100.
Further, the walking end beam 4 and the main beam 1 adopt an oblique crossing design, and the oblique crossing angle is set to be (the included angle between the tangent of the main cable 5 and the main beam 1 in the maximum span and the included angle between the tangent of the main cable 5 and the main beam 1 in the minimum span)/2. The design is favorable for improving the safety and the stability during the span change, and when 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 jacking mechanism 31 is kept to be d/L less than or equal to 6/100.
Furthermore, a circle of flange 421 is arranged in the middle of the running wheel 42, and the main cable 5 is provided with a groove 51 matched with the flange 421. The design can further improve the safety and the stability during the span changing, and when 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 d/L less than or equal to 10/100.
The invention has the beneficial effects that:
1. the invention provides a variable-span cable crane, which does not need external force, can automatically perform variable-span action during construction, is scientific and stable in variable-span action, has no potential safety hazard, is suitable for the installation of a suspension bridge with variable main cable spacing, improves the practicability of the cable crane, enlarges the application range and provides an optimal hoisting tool for the installation of the suspension bridge with variable main cable spacing;
2. the invention realizes that the walking end beam connected with the transverse sliding seat can change the span diameter by arranging the transverse sliding chute, the transverse sliding seat and the variable-span pushing mechanism connected with the transverse sliding seat;
3. the span-variable jacking mechanism can ensure that the bearing force of the span-variable cable crane is uniform and the gravity center is stable when the span is changed by using the synchronous control platform, so that the safety and the stability of the span can be improved;
4. the displacement space is arranged between the walking wheels and the main cable, so that when the span is changed, the walking wheels can be displaced in the displacement space relative to the main cable, the walking wheels and the main cable can not be separated, and the transverse pushing or transverse pulling distance of the span-changing pushing mechanism can be relatively increased, so that the safety and the stability when the span is changed and the efficiency of the span change 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 (the included angle between the tangent line of the main cable 5 and the main beam 1 in the maximum span and the included angle between the tangent line of the main cable 5 and the main beam 1 in the minimum span)/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 the stability in the variable-span process and the variable-span efficiency are improved;
6. the middle part of the walking wheel is provided with a circle of flange, the main cable is provided with a groove matched with the flange, when the span is changed, the walking wheel and the main cable are tightly connected, the transverse pushing or transverse pulling distance of the span-changing pushing mechanism can be further increased by the design, and the safety and the stability when the span is changed and the span-changing efficiency are improved.
Drawings
FIG. 1 is a general view of a variable span cable crane of the present invention;
FIG. 2 is an assembled view of the traverse chute and the traverse slide according to the present invention;
FIG. 3 is a cross-sectional view of the sideslip chute of the present invention;
FIG. 4 is a cross-sectional view of the cross slide of the present invention;
FIG. 5 is a state diagram of the variable span of the walking end beam of the present invention when it advances L;
FIG. 6 is a working diagram of a walking end beam and a main cable according to embodiment 1 of the present invention;
FIG. 7 is a working diagram of a walking end beam and a main cable according to embodiment 2 of the present invention;
FIG. 8 is an oblique cross view of the walking end beams and the main beams of embodiment 3 of the invention;
FIG. 9 is a schematic view of an included angle between a tangent line of a main cable and a main beam when the maximum span of the variable-span cable crane is achieved according to the present invention;
FIG. 10 is an enlarged view of an included angle between a tangent line of a main cable and a main beam when the maximum span of the variable-span cable crane according to the present invention is achieved;
FIG. 11 is a schematic view of an included angle between a tangent line of a main cable and a main beam when the minimum span of the variable-span cable crane is provided;
FIG. 12 is an enlarged view of an included angle between a tangent line of a main cable and a main beam when the minimum span of the variable-span cable crane is provided;
FIG. 13 is an operation view of a traveling wheel and a main cable according to embodiment 4 of the present invention;
in the figure, 1-main beam, 2-cable-carried hoisting mechanism, 21-steel strand, 3-wing beam, 31-variable span jacking mechanism, 32-transverse sliding chute, 33-transverse sliding seat, 4-walking end beam, 41-supporting beam, 42-walking wheel, 421-flange, 5-main cable and 51-groove
Detailed Description
Example 1
A variable-span cable-mounted crane comprises a main beam 1, wherein a cable-mounted hoisting mechanism 2 is arranged in the middle of the main beam 1, and two wing beams 3 are arranged at two ends of the main beam 1; the cable-loaded hoisting mechanism 2 is connected with a steel strand 21 provided with a lifting appliance; a variable-span jacking mechanism 31 is installed on the spar 3 in the direction away from the main beam 1, a transverse sliding groove 32 is formed in the lower end of the spar 3, as shown in fig. 3, a transverse sliding seat 33 is matched with the transverse sliding groove 32, as shown in fig. 4, and the transverse sliding seat 33 is connected with the variable-span jacking mechanism 31; a walking end beam 4 is connected below the transverse sliding 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 transverse sliding seat 33, and the walking wheels 42 are arranged below the supporting beam 41; the running wheels 42 run above the main cable 5 of the suspension bridge in a matched manner.
The walking end beam 4 is hinged with the transverse sliding seat 33 by a pin shaft, the walking wheels 42 are 4 groups, and the variable span pushing mechanism 31 is a transverse oil cylinder.
The span-variable pushing mechanism 31 uses a synchronous control platform, so that the safety and the stability of the span change can be improved.
When the device works, the traveling wheels 42 are positioned on the main cable 5, and when the span is required to be changed, the connected transverse sliding seat 33 is transversely pushed or pulled through the span-changing jacking mechanism 31, and the transverse sliding seat 33 moves in the transverse sliding chute 32, as shown in fig. 2; meanwhile, the walking end beam 4 connected with the transverse sliding seat 33 has the outward pushing or inward retracting action, and the main cable 5 is tightly clamped with the walking wheels 42 of the walking end beam 4 and has a certain clamping effect, as shown in fig. 6, the main cable 5 is pushed outward or inward retracted along with the action of the walking end beam 4, so that the effect of changing the span is achieved. After the span is changed, the cable-loaded hoisting mechanism hoists through the steel strand.
As shown in fig. 5, when the variable-span cable crane is operated, the span in the initial state is B1, the traverse distance is d by the traverse operation of the variable-span jack mechanism 31, and the span is B2 after the variable-span cable crane advances by L distance, in which:
d＝(B1-B2)/2
through a large number of experiments, when the variable-span cable crane works in a variable-span 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 variable-span jacking mechanism 31 is kept to be equal to or less than 3/100. In this range, the main cable can not be separated from the limit of the walking wheels, and the variable span action is stable and safe.
Example 2
On the basis of embodiment 1, a variable-span cable crane is provided, wherein a displacement space is arranged between the travelling wheels 42 and the main cable 5, and during the travelling process, when the span is changed, the displacement of the travelling wheels 42 relative to the main cable 5 is ensured to be within the displacement space, as shown in fig. 7.
In the embodiment, the design that the walking wheels are tightly matched with the main cable in the embodiment 1 is changed, and the displacement space is arranged between the walking wheels and the main cable, so that the design is favorable for improving the safety and the stability during high span.
Through a large number of experiments, when the variable-span cable crane works in a variable-span 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 variable-span jacking mechanism 31 is kept to be equal to or less than 5/100. Compared with the embodiment 1, the main cable is not easy to be separated from the limit of the traveling wheels, so that the maximum safe transverse pushing or transverse pulling distance of the variable-span jacking mechanism is correspondingly improved.
Example 3
On the basis of embodiment 1, the variable-span cable crane has the advantages that the walking end beam 4 and the main beam 1 are designed in an oblique crossing mode, and the oblique crossing angle is set to be (the included angle between the tangent line of the main cable 5 and the main beam 1 in the maximum span and the included angle between the tangent line of the main cable 5 and the main beam 1 in the minimum span)/2.
As shown in fig. 8, the angle of the oblique crossing between the walking end beam 4 and the main beam 1 is θ;
as shown in fig. 9 and 10, the included angle between the tangent of the main cable 5 and the main beam 1 is α at the maximum span;
as shown in fig. 11 and 12, the included angle between the tangent of the main cable 5 and the main beam 1 at the minimum span is β;
setting:
θ＝(α+β)/2
the design reduces the transverse displacement of the main cable relative to the walking end beam, also reduces the transverse stress of the main cable when the span is changed, and is beneficial to improving the safety and the stability when the span is changed.
Through a large number of experiments, when the variable-span cable crane works in a variable-span 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 variable-span jacking mechanism 31 is kept to be equal to or less than 6/100.
Example 4
On the basis of embodiment 1, the variable-span cable crane is provided with a circle of flanges 421 at the middle parts of the running wheels 42, and the main cable 5 is provided with a groove 51 matched with the flanges 421, as shown in fig. 13.
The design can greatly improve the constraint action 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 of the main cable can be greatly improved when the span is changed.
Through a large number of experiments, when the variable-span cable crane works in a variable-span 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 variable-span jacking mechanism 31 is kept to be equal to or less than 10/100.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A variable span cable loading crane is characterized in that: the variable-span cable-mounted crane comprises a main beam (1), wherein a cable-mounted hoisting mechanism (2) is arranged in the middle of the main beam (1), and two wing beams (3) are arranged at two ends of the main beam (1); the cable-loaded hoisting mechanism (2) is connected with a steel strand (21) provided with a lifting appliance; a span-variable jacking mechanism (31) is mounted in the direction of the wing beam (3) far away from the main beam (1), a transverse moving chute (32) is arranged at the lower end of the wing beam (3), a transverse moving slide seat (33) is matched with the transverse moving chute (32), and the transverse moving slide seat (33) is connected with the span-variable jacking mechanism (31); a walking end beam (4) is connected below the transverse sliding 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 transverse sliding seat (33), and the walking wheels (42) are arranged below the supporting beam (41); the walking wheels (42) are arranged above the suspension bridge main cable (5) and run in a matched mode.
2. A variable span cable loader according to claim 1 wherein: the walking end beam (4) is hinged with the transverse sliding seat (33) by a pin shaft, 4 groups of walking wheels (42) are provided, and the variable-span jacking mechanism (31) is a transverse oil cylinder.
3. A variable span cable loader according to claim 1 wherein: the span-variable jacking mechanism (31) uses a synchronous control platform.
4. A variable-span cable crane according to any one of claims 1 to 3, wherein: 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 jacking mechanism (31) is kept to be not more than 3/100.
5. A variable span cable loader according to claim 1 wherein: a displacement space is arranged between the walking wheels (42) and the main cable (5), and during walking, when the span is changed, the displacement of the walking wheels (42) relative to the main cable (5) is ensured to be in the displacement space.
6. A variable span cable loader according to claim 5 wherein: 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 jacking mechanism (31) is kept to be not more than 5/100.
7. A variable span cable loader according to claim 1 wherein: walking end beam (4) with girder (1) adopt the skew design, and the skew angle sets up to (when the biggest span main push-towing rope (5) tangent line with when the contained angle of girder (1) + minimum span main push-towing rope (5) tangent line with the contained angle of girder (1)/2.
8. A variable span cable loader according to claim 7 wherein: 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 jacking mechanism (31) is kept to be not more than 6/100.
9. A variable span cable loader according to claim 1 wherein: a circle of flange (421) is arranged in the middle of the walking wheel (42), and a groove (51) matched with the flange (421) is formed in the main cable (5).
10. A variable span cable loader according to claim 9 wherein: 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 jacking mechanism (31) is kept to be not more than 10/100.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460475.0A CN112551360A (en) | 2020-12-11 | 2020-12-11 | 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 CN112551360A (en) | 2020-12-11 | 2020-12-11 | Variable-span cable-mounted crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112551360A true CN112551360A (en) | 2021-03-26 |
Family
ID=75062468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011460475.0A Pending CN112551360A (en) | 2020-12-11 | 2020-12-11 | Variable-span cable-mounted crane |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112551360A (en) |
| WO (1) | WO2022121320A1 (en) |
| ZA (1) | ZA202207963B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022121320A1 (en) * | 2020-12-11 | 2022-06-16 | 中铁九桥工程有限公司 | Variable-span cable crane |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| CN112551360A (en) * | 2020-12-11 | 2021-03-26 | 中铁九桥工程有限公司 | Variable-span cable-mounted crane |
-
2020
- 2020-12-11 CN CN202011460475.0A patent/CN112551360A/en active Pending
-
2021
- 2021-07-21 WO PCT/CN2021/107603 patent/WO2022121320A1/en active Application Filing
-
2022
- 2022-07-18 ZA ZA2022/07963A patent/ZA202207963B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022121320A1 (en) * | 2020-12-11 | 2022-06-16 | 中铁九桥工程有限公司 | Variable-span cable crane |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022121320A1 (en) | 2022-06-16 |
| ZA202207963B (en) | 2022-09-28 |
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