CN110607754A - Method for reducing winding degree of main girder during hole crossing of single-girder descending type bridge girder erection machine - Google Patents
Method for reducing winding degree of main girder during hole crossing of single-girder descending type bridge girder erection machine Download PDFInfo
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- CN110607754A CN110607754A CN201910945111.2A CN201910945111A CN110607754A CN 110607754 A CN110607754 A CN 110607754A CN 201910945111 A CN201910945111 A CN 201910945111A CN 110607754 A CN110607754 A CN 110607754A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 30
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000007665 sagging Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 241001669679 Eleotris Species 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a method for reducing the winding degree of a bridging girder during hole crossing of a single-track-girder descending type bridge girder erection machine, which comprises the following steps: the invention increases a supporting point through the position near the middle supporting leg of the first bridge girder, solves the problem of middle sagging during hole crossing, reduces middle deflection, reduces resistance during hole crossing of the bridge girder, increases a supporting point of the bracket trolley near the middle supporting leg of the second bridge girder, thereby enhancing the stability during the hole crossing of the whole machine, increasing the transportation safety of the bridge girder and improving the working efficiency.
Description
Technical Field
The invention relates to a method for reducing the winding degree of a main girder of a bridge, in particular to a method for reducing the winding degree of the main girder of the bridge during hole crossing of a single-girder descending type bridge girder erection machine, and belongs to the technical field of hole crossing application of the single-girder descending type bridge girder erection machine.
Background
In the bridge erecting industry, in order to meet the requirement of continuous bridge erecting, a bridge erecting machine turns down a girder erecting machine between two bridge piers after erecting a bridge between the two bridge piers, so that the continuous bridge erecting is realized. The existing bridge girder erection machine hole spanning steps are as follows: the guide beam extends out of a main bridge of the bridge girder erection machine, the front support leg is fixed on the guide beam, when the guide beam extends to the upper part of the next bridge pier, the front support leg is stopped, opened and supported on the bridge pier and lifts the guide beam upwards; and then the cross-hole power mechanism at the tail end of the main beam for bridging downwards rotates the travelling wheels to support on the bridge floor and upwards lift the main beam for bridging, so that the rear support leg leaves the bridge floor, and the middle support leg also leaves the bridge pier, namely, the rear support leg and the middle support leg are both in a suspended state. The bridging girder cross-hole power mechanism pushes the bridging girder with the rear support leg and the middle support leg to move forwards along the guide beam until the bridging girder moves to a proper position, the cross-hole power mechanism at the tail end of the bridging girder retracts, the front support leg retracts, the rear support leg retracts on the bridge floor, the middle support leg supports on the bridge pier, and the cross-hole operation is completed.
The patent of prior art is granted and is announced a balanced type single nose girder bridge girder erection machine of CN201485790U, this balanced type single nose girder bridge girder erection machine, can realize the erection of the single line or the double-track railway T roof beam that curvature radius is more than or equal to 500 meters, however, this balanced type single nose girder bridge girder erection machine can 'T solve the centre drooping when striding the hole, the great problem of well amount of deflection can' T be solved, simultaneously, also be difficult to solve the problem of quick removal bridge girder, for this reason, we provide a method that reduces bridge girder winding degree when descending bridge girder erection machine strides the hole of single track roof beam.
Disclosure of Invention
The invention aims to adjust the height of the whole bridging girder by the working of the telescopic oil cylinders on two sides of the frame, place the bracket trolley at the bottom of the bridging girder, and work again by the telescopic oil cylinders to ensure that the bridging girder and the bracket trolley are matched with each other to realize the placement of the bracket trolley, and drive the adjusting rod to rotate by the cross-hole power mechanism, so that the adjusting rod supports the bridging girder, the walking wheels are contacted with the ground, and the change of the position of the bridging girder is realized under the joint matching of the walking wheels and the bracket trolley.
The technical problem solved by the invention is as follows:
(1) how to adjust the height of the whole bridging girder by the work of the telescopic oil cylinders on the two sides of the frame so as to place the bracket trolley at the bottom of the bridging girder, and the bridging girder and the bracket trolley are mutually matched by the secondary work of the telescopic oil cylinders so as to realize the placement of the bracket trolley, thereby solving the problem that the bracket trolley is difficult to be quickly placed in the prior art;
(2) how to drive through striding hole power unit and adjust the pole rotation to make the regulation pole support the bridge girder of putting up, walking wheel and ground contact realize changing the position of bridge girder under walking wheel and, the common cooperation of bracket dolly, solve the problem that is difficult to the fast migration bridge girder among the prior art.
The purpose of the invention can be realized by the following technical scheme: a method for reducing the winding degree of a bridging girder during hole crossing of a single-track-girder descending type bridge girder erection machine comprises the following steps:
the guide beam extends above the first bridge pier, the front support leg is unfolded and supported on the bridge pier and lifts the guide beam upwards, the frame is pushed to the position near the middle support leg, the telescopic oil cylinder piston rod extends out and is supported on the support frame and lifts the bridging main beam, the middle support leg leaves the second bridge pier in a suspended manner, the bracket trolley is moved to the position below the bridging main beam and is close to the middle support leg, then the oil cylinder piston rod is retracted, the bridging main beam falls back and is supported on the bracket trolley, then the cross-hole power mechanism at the tail end of the bridging main beam rotates downwards, the walking wheel is supported on the support frame and lifts the bridging main beam upwards to enable the rear support leg to leave the bridge floor, the bracket trolley is supported at the middle position between the rear support leg and the front support leg at the moment and has the function of supporting the main beam, the middle sagging caused by the self-weight of the bridging main beam, the guide beam and the middle support leg, the walking wheel is supported at the top of the support frame and lifts the bridge girder upwards to enable the rear support leg to leave the support frame, the hole-crossing power mechanism pushes the bridge girder to move forwards along the guide beam together with the rear support leg and the middle support leg, the rear support leg stops when the rear support leg moves to the position of the bracket trolley, the fulcrums at two ends of the hole of the bridge girder erection machine are close to the distance in front of the hole, the telescopic oil cylinder piston rod on the frame extends out and is supported on the bridge floor to lift the bridge girder, the bracket trolley is moved away, then the telescopic oil cylinder piston rod is retracted, the bridge girder falls back, the hole-crossing power mechanism continues to operate until the bridge girder and the middle support leg stop, the hole-crossing power mechanism at the tail end of the bridge girder erection is retracted, the front support leg is retracted.
The invention has further technical improvements that: a first bridge pier, a second bridge pier and a third bridge pier are arranged below the support frame, the tops of the third bridge pier and the second bridge pier are respectively and fixedly connected with the bottoms of the two ends of the support frame, a bridge girder is arranged above the support frame, a guide beam is connected in the bridge girder in a sliding mode, and one end of the guide beam penetrates through the end portion of the bridge girder;
one end of the bridging girder is rotatably connected with an adjusting rod through a cross-hole power mechanism, walking wheels are mounted at the bottom of one end, far away from the bridging girder, of the adjusting rod, a mounting frame is fixedly sleeved at one end, close to the adjusting rod, of the bridging girder, a rear supporting leg is mounted at the top of the mounting frame, the top of the rear supporting leg penetrates through the bridging girder and is in contact with the top of the supporting frame, a limiting frame is fixedly sleeved at the other end of the bridging girder, a middle supporting leg is arranged above the limiting frame, and the bottom of the middle supporting leg penetrates;
a frame is sleeved between the rear support leg and the middle support leg on the outer side of the bridge girder, fixing seats are symmetrically fixed on two sides of the frame, telescopic oil cylinders are fixed in the fixing seats, and the end parts of output shafts of the telescopic oil cylinders penetrate through the bottoms of the fixing seats;
the top of the support frame is provided with a bracket trolley, the bracket trolley is positioned under the bridge girder, and the bracket trolley is matched with the bridge girder;
the bridge comprises a bridge girder, a guide beam, a front support leg and a first bridge pier, wherein the guide beam penetrates through one end of the bridge girder to be bridged and is provided with the front support leg, and the bottom end of the front support leg is in contact with the first bridge pier.
The invention has further technical improvements that: the support frame trolley is characterized in that the support frame trolley is composed of pulleys, a support, a rotating shaft and sleepers, the sleepers are arranged at the top of the support frame, the support is fixed at the top of each sleeper, the rotating shafts are symmetrically arranged in the support frames, the pulleys are sleeved on the outer sides of the rotating shafts, and the pulleys are rotatably connected with the rotating shafts through bearings.
The invention has further technical improvements that: the bottom of the frame is fixed with a fixed plate which is matched with the supporting frame.
The invention has further technical improvements that: be the equidistance setting between first pier, second pier and the third pier.
The invention has further technical improvements that: the frame is connected to the outer side of the bridging girder in a sliding mode.
Compared with the prior art, the invention has the beneficial effects that:
1. when the invention is used, a frame is sleeved outside a bridge girder, telescopic oil cylinders are arranged on two sides of the frame through fixing seats, when the invention is not used, a piston rod of the telescopic oil cylinder is retracted and is not connected with a support frame, a guide beam extends to the upper part of a first bridge pier, a front support leg is unfolded and supported on the bridge pier and lifts the guide beam upwards, at the moment, the frame is pushed to the vicinity of a middle support leg, the piston rod of the telescopic oil cylinder extends out and is supported on the support frame and lifts the bridge girder, the middle support leg is suspended away from a second bridge pier, a bracket trolley is moved to the lower part of the bridge girder and is close to the middle support leg, then the piston rod of the oil cylinder is retracted, the bridge girder falls back and is supported on the bracket trolley, the height of the whole bridge girder is adjusted through the work of the telescopic oil cylinders on two sides of the frame, the bracket trolley is placed, the structure is simple, the operation is convenient, the time for installing the bracket trolley is saved, and the working efficiency is improved;
2. the cross-hole power mechanism at the tail end of the bridge girder rotates downwards, the travelling wheel is supported at the top of the support frame and lifts the bridge girder upwards, so that the rear support leg leaves the support frame, the cross-hole power mechanism pushes the bridge girder to move forwards along the guide beam together with the rear support leg and the middle support leg, when the rear support leg moves to the position of the bracket trolley, the bridge girder stops, and at the moment, the pivots at two ends of the cross hole of the bridge girder erection machine approach the distance in front of the cross hole; a piston rod of a telescopic oil cylinder on the frame extends out and is supported on a bridge floor and lifts a bridging girder, a bracket trolley is moved away, then the piston rod of the telescopic oil cylinder is retracted, the bridging girder falls back, a hole-crossing power mechanism continues to operate until the bridging girder and a middle supporting leg stop, the hole-crossing power mechanism drives an adjusting rod to rotate, so that the adjusting rod supports the bridging girder, a travelling wheel is contacted with the ground, the position of the bridging girder is changed under the common cooperation of the travelling wheel and the bracket trolley, a supporting point is added near the middle supporting leg of the first bridging girder, the problem of middle sagging during hole crossing is solved, the middle deflection is reduced, the resistance during hole crossing of the bridging girder is reduced, a bracket trolley supporting point is added near the middle supporting leg of the second bridging girder, the stability during hole crossing of the whole machine is enhanced, and the time for manually adding the bridge at one point is saved, the transportation safety of the bridge girder is increased, and the working efficiency is improved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a bridge girder before moving;
FIG. 2 is a schematic diagram of the structure of the bridge girder after moving;
FIG. 3 is a schematic view of the frame structure of the present invention;
FIG. 4 is a side view of the frame of the present invention;
FIG. 5 is a schematic view of the carriage of the present invention.
In the figure: 1. bridging the girder; 2. a frame; 3. a fixing plate; 4. a telescopic oil cylinder; 5. a fixed seat; 6. a guide beam; 7. a front leg; 8. a first bridge pier; 9. a cross-hole power mechanism; 10. a traveling wheel; 11. a cradle dolly; 12. a pulley; 13. a support; 14. a rotating shaft; 15. crossties; 16. a middle support leg; 17. a rear leg; 18. a second bridge pier; 19. a mounting frame; 20. a support frame; 21. a third bridge pier; 22. adjusting a rod; 23. a limiting frame.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a method for reducing the winding degree of a bridging girder during hole crossing of a single-track-girder descending type bridge girder erection machine, the method for reducing the winding degree of the bridging girder comprises the following steps:
the guide beam 6 extends to the upper part of a first pier 8, a front supporting leg 7 is unfolded and supported on the piers and lifts up the guide beam 6, at the moment, the frame 2 is pushed to the vicinity of a middle supporting leg 16, a piston rod of a telescopic oil cylinder 4 extends out and is supported on a supporting frame 20 and lifts up the bridging girder 1, the middle supporting leg 16 is suspended away from a second pier 18, a bracket trolley 11 is moved to the lower part of the bridging girder 1 and is close to the middle supporting leg 16, then the piston rod of the oil cylinder is retracted, the bridging girder 1 falls back and is supported on the bracket trolley 11, then a hole spanning power mechanism 9 at the tail end of the bridging girder 1 rotates a travelling wheel 10 downwards and is supported on the supporting frame 20 and lifts up the bridging girder 1, so that the rear supporting leg 17 is separated from the bridge floor, at the moment, the bracket trolley 11 is supported at the middle position between the rear supporting leg 17 and the front supporting leg 7 and plays a role in supporting the bridging girder, The middle of the bridge girder 1 sags down, thereby reducing the middle deflection, the cross-hole power mechanism 9 at the tail end of the bridge girder 1 rotates downwards, the traveling wheels 10 are supported at the top of the support frame 20 and lift the bridge girder 1 upwards, so that the rear support legs 17 leave the support frame 20, the cross-hole power mechanism 9 pushes the bridge girder 1 to move forwards along the guide beam 6 together with the rear support legs 17 and the middle support legs 16, when the rear support legs 17 move to the position of the bracket trolley 11, the bridge girder stops, the fulcrum points at the two ends of the cross-hole of the bridge girder erection machine approach the distance in front of the cross-hole, the piston rod of the telescopic oil cylinder 4 on the frame 2 extends out and is supported on the bridge floor and lifts the bridge girder 1, the bracket trolley 11 is removed, then the piston rod of the telescopic oil cylinder 4 is retracted, the bridge girder 1 falls back, the cross-hole power mechanism 9 continues to operate until the bridge girder 1 and the middle, the rear legs 17 drop back on the deck and the middle legs 16 are supported on the piers to complete the cross-over.
A first pier 8, a second pier 18 and a third pier 21 are arranged below the support frame 20, the tops of the third pier 21 and the second pier 18 are respectively and fixedly connected with the bottoms of the two ends of the support frame 20, a bridge girder 1 is arranged above the support frame 20, a guide beam 6 is connected in the bridge girder 1 in a sliding mode, and one end of the guide beam 6 penetrates through the end portion of the bridge girder 1;
one end of the bridging girder 1 is rotatably connected with an adjusting rod 22 through a cross-hole power mechanism 9, the bottom of one end, away from the bridging girder 1, of the adjusting rod 22 is provided with a traveling wheel 10, a motor is fixed in the adjusting rod 22, the end part of an output shaft of the motor is fixedly connected with the center of one end of the traveling wheel 10, one end, close to the adjusting rod 22, of the bridging girder 1 is fixedly sleeved with a mounting rack 19, the top of the mounting rack 19 is provided with a rear supporting leg 17, the top of the rear supporting leg 17 penetrates through the bridging girder 1 to be contacted with the top of a supporting rack 20, the other end of the bridging girder 1 is fixedly sleeved with a limiting rack 23, a middle supporting leg 16 is arranged above the limiting;
the frame 2 is sleeved between the rear supporting leg 17 and the middle supporting leg 16 on the outer side of the bridge girder 1, fixing seats 5 are symmetrically fixed on two sides of the frame 2, a telescopic oil cylinder 4 is fixed inside each fixing seat 5, and the end part of an output shaft of each telescopic oil cylinder 4 penetrates through the bottom of each fixing seat 5;
the top of the support frame 20 is provided with a bracket trolley 11, the bracket trolley 11 is positioned under the bridge girder 1, and the bracket trolley 11 is matched with the bridge girder 1;
the guide beam 6 penetrates through one end of the main beam 1 of the bridge and is provided with a front support leg 7, and the bottom end of the front support leg 7 is in contact with the first bridge pier 8.
Bracket dolly 11 comprises pulley 12, support 13, axis of rotation 14 and sleeper 15, support frame 20 top is provided with sleeper 15, sleeper 15 top is fixed with support 13, the inside symmetry of support 13 is provided with axis of rotation 14, the axle of rotation 14 outside cover is equipped with pulley 12, and pulley 12 rotates through bearing and axis of rotation 14 to be connected, through the setting of pulley 12, support 13, axis of rotation 14 and sleeper 15, is convenient for change the position of bracket dolly 11, realizes getting of bracket dolly 11 and puts.
The bottom of the frame 2 is fixed with a fixing plate 3, the fixing plate 3 is matched with the support frame 20, and the strength of the frame 2 is increased through the arrangement of the fixing plate 3.
Be the equidistance setting between first pier 8, second pier 18 and the third pier 21, first pier 8, second pier 18 and the third pier 21 through the equidistance setting increase bridge construction's stability and security.
The frame 2 is connected to the outer side of the bridging girder 1 in a sliding manner, and is connected to the outer side of the bridging girder 1 in a sliding manner through the frame 2, so that the position of the frame 2 is convenient to change, and the support position of the bridging girder 1 is adjusted.
The working principle is as follows: when the invention is used, firstly, a frame 2 is sleeved outside a bridge girder 1, the frame 2 can move on the bridge girder 1, when not used, the frame 2 can be pushed to one side of a near-middle supporting leg 16 without interfering a bridge feeding beam, a fixed plate 3 fixed at the bottom of the frame 2 increases the supporting strength of the frame 2, telescopic oil cylinders 4 are arranged at two sides of the frame 2 through a fixed seat 5, when not used, piston rods of the telescopic oil cylinders 4 are retracted and are not contacted with a supporting frame 20, a guide beam 6 extends to the upper part of a first bridge pier 8, a front supporting leg 7 is unfolded and supported on the bridge pier and lifts the guide beam 6 upwards, at the moment, the frame 2 is pushed to the vicinity of the middle supporting leg 16, the piston rods of the telescopic oil cylinders 4 extend to be supported on the supporting frame 20 and lift the bridge girder 1, the middle supporting leg 16 leaves a second bridge pier 18 and is suspended, a bracket trolley 11 is moved to the lower part, is supported on the bracket trolley 11; then the cross-hole power mechanism 9 at the tail end of the main girder 1 of the bridge girder rotates the travelling wheels 10 downwards to be supported on the support frame 20 and lift the main girder 1 of the bridge girder upwards to enable the rear support legs 17 to leave the bridge floor, at the moment, the bracket trolley 11 is supported at the middle position between the rear support legs 17 and the front support legs 7, has the function of supporting the bridging girder 1, reduces the middle sag of the bridging girder 1 and the guide beam 6 caused by the dead weight of the bridging girder 1, the guide beam 6 and the middle support leg 16, thereby reducing the middle deflection, the cross-hole power mechanism 9 at the tail end of the main beam 1 of the bridge rotates downwards, the travelling wheels 10 are supported at the top of the support frame 20 and lift the main beam 1 of the bridge upwards, the rear supporting legs 17 leave the support frame 20, the cross-hole power mechanism 9 pushes the main beam 1 of the bridge to move forwards along the guide beam 6 together with the rear supporting legs 17 and the middle supporting legs 16, when the rear leg 17 walks to the position of the bracket trolley 11, stopping, and enabling the fulcrum at the two ends of the span hole of the bridge girder erection machine to be close to the distance in front of the span hole; a piston rod of a telescopic oil cylinder 4 on the frame 2 extends out to be supported on a bridge floor and lifts a bridge girder 1, a bracket trolley 11 is removed, then the piston rod of the telescopic oil cylinder 4 is retracted, the bridge girder 1 falls back, a hole-crossing power mechanism 9 continues to operate until the bridge girder 1 and a middle supporting leg 16 stop, the hole-crossing power mechanism 9 at the tail end of the bridge girder 1 retracts, a front supporting leg 7 retracts, a rear supporting leg 17 falls back on the bridge floor, the middle supporting leg 16 supports a pier, and hole crossing is completed.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a method for reducing bridge girder winding degree when single track roof beam descending type bridge girder erection machine strides hole, its characterized in that: the method for reducing the winding degree of the bridge girder comprises the following steps:
the guide beam (6) extends to the upper part of a first pier (8), a front support leg (7) is unfolded and supported on the piers and lifts the guide beam (6) upwards, at the moment, the frame (2) is pushed to the vicinity of a middle support leg (16), a piston rod of a telescopic oil cylinder (4) extends and is supported on a support frame (20) and lifts a bridging girder (1), the middle support leg (16) leaves a second pier (18) to be suspended, a bracket trolley (11) is moved to the lower part of the bridging girder (1) and is close to the middle support leg (16), then the piston rod of the oil cylinder is retracted, the bridging girder (1) falls back and is supported on the bracket trolley (11), then a hole-crossing power mechanism (9) at the tail end of the bracket girder (1) downwards rotates a travelling wheel (10) to be supported on the support frame (20) and lifts the bridging girder (1) upwards to enable a rear support leg (17) to leave the bridge floor, at the moment, the bracket trolley (11) is supported at the middle position, the device has the function of supporting a bridge girder (1), reduces the middle sag brought to the bridge girder (1) and the guide beam (6) by the dead weight of the bridge girder (1), the guide beam (6) and the middle supporting leg (16), thereby reducing the middle deflection, a hole spanning power mechanism (9) at the tail end of the bridge girder (1) rotates downwards, a travelling wheel (10) is supported at the top of a support frame (20) and lifts the bridge girder (1) upwards, a rear supporting leg (17) leaves the support frame (20), the hole spanning power mechanism (9) pushes the bridge girder (1) to be connected with the rear supporting leg (17) and the middle supporting leg (16) to move forwards along the guide beam (6), when the rear supporting leg (17) moves to the position of a bracket trolley (11), the bridge girder erection machine stops at the moment, the pivots at two ends of a span hole are close to the distance in front of the span hole, a piston rod of a telescopic oil cylinder (4) on a frame (2) extends out to be supported on, the bracket trolley (11) is moved away, then the piston rod of the telescopic oil cylinder (4) is retracted, the bridging girder (1) falls back, the hole-spanning power mechanism (9) continues to operate until the bridging girder (1) and the middle support leg (16) stop, the hole-spanning power mechanism (9) at the tail end of the bridging girder (1) is retracted, the front support leg (7) is retracted, the rear support leg (17) falls back on the bridge floor, and the middle support leg (16) supports the bridge pier to complete hole spanning.
2. The utility model provides a method for reducing bridge girder winding degree when single track roof beam descending type bridge girder erection machine strides hole, its characterized in that: a first pier (8), a second pier (18) and a third pier (21) are arranged below the support frame (20), the tops of the third pier (21) and the second pier (18) are respectively fixedly connected with the bottoms of the two ends of the support frame (20), a bridge girder (1) is arranged above the support frame (20), a guide beam (6) is connected in the bridge girder (1) in a sliding mode, and one end of the guide beam (6) penetrates through the end portion of the bridge girder (1);
one end of the bridging girder (1) is rotatably connected with an adjusting rod (22) through a cross-hole power mechanism (9), the bottom of one end, far away from the bridging girder (1), of the adjusting rod (22) is provided with a traveling wheel (10), one end, close to the adjusting rod (22), of the bridging girder (1) is fixedly sleeved with a mounting frame (19), the top of the mounting frame (19) is provided with a rear supporting leg (17), the top of the rear supporting leg (17) penetrates through the bridging girder (1) to be in contact with the top of a supporting frame (20), the other end of the bridging girder (1) is fixedly sleeved with a limiting frame (23), a middle supporting leg (16) is arranged above the limiting frame (23), and the bottom of the middle supporting leg (16) penetrates through the girder (1);
a frame (2) is sleeved between a rear supporting leg (17) and a middle supporting leg (16) on the outer side of the bridge girder (1), fixing seats (5) are symmetrically fixed on two sides of the frame (2), a telescopic oil cylinder (4) is fixed inside each fixing seat (5), and the end part of an output shaft of each telescopic oil cylinder (4) penetrates through the bottom of each fixing seat (5);
a bracket trolley (11) is arranged at the top of the support frame (20), the bracket trolley (11) is positioned under the bridge girder (1), and the bracket trolley (11) is matched with the bridge girder (1);
the bridge girder erection device is characterized in that a front supporting leg (7) is installed at one end, penetrating through the bridge girder (1), of the guide beam (6), and the bottom end of the front supporting leg (7) is in contact with a first bridge pier (8).
3. The method for reducing the winding degree of a main girder during hole crossing of the single-girder descending type bridge girder erection machine according to claim 1, wherein the bracket trolley (11) consists of pulleys (12), a support (13), a rotating shaft (14) and sleepers (15), the sleepers (15) are arranged at the top of the support frame (20), the support (13) is fixed at the top of the sleepers (15), the rotating shaft (14) is symmetrically arranged in the support (13), the pulleys (12) are sleeved outside the rotating shaft (14), and the pulleys (12) are rotatably connected with the rotating shaft (14) through bearings.
4. The method for reducing the winding degree of the main girder during hole crossing of the single-track-girder descending type bridge girder erection machine according to claim 1, wherein a fixing plate (3) is fixed at the bottom of the frame (2), and the fixing plate (3) is matched with the supporting frame (20).
5. The method for reducing the winding degree of the main girder during hole crossing of the single-girder descending type bridge girder erection machine according to claim 1, wherein the first pier (8), the second pier (18) and the third pier (21) are arranged at equal intervals.
6. The method for reducing the winding degree of a bridging girder during hole crossing of a single-track-girder descending type bridge girder erection machine according to claim 1, wherein the frame (2) is slidably connected to the outer side of the bridging girder (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910945111.2A CN110607754A (en) | 2019-09-30 | 2019-09-30 | Method for reducing winding degree of main girder during hole crossing of single-girder descending type bridge girder erection machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910945111.2A CN110607754A (en) | 2019-09-30 | 2019-09-30 | Method for reducing winding degree of main girder during hole crossing of single-girder descending type bridge girder erection machine |
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| CN110607754A true CN110607754A (en) | 2019-12-24 |
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| CN201910945111.2A Pending CN110607754A (en) | 2019-09-30 | 2019-09-30 | Method for reducing winding degree of main girder during hole crossing of single-girder descending type bridge girder erection machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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