CN115852842A - Front supporting leg mechanism of bridge girder erection machine and bridge girder erection machine - Google Patents

Abstract

The invention provides a front supporting leg mechanism of a bridge girder erection machine and the bridge girder erection machine comprising the front supporting leg mechanism of the bridge girder erection machine. The upper telescopic device comprises an upper outer column body and an upper inner column body; the upper inner column body is used for relatively moving or relatively fixing in the upper outer column body. The lower telescopic device comprises a lower outer column body and a lower inner column body; the lower inner column is used for moving or fixing in the lower outer column. The bottom of the upper telescopic device is hinged to the top of the lower telescopic device, the upper fixing device and the lower fixing device are used for fixing the upper telescopic device and the lower telescopic device, and the overturning driving device is used for driving the lower telescopic device to overturn. The front support leg mechanism of the bridge girder erection machine and the bridge girder erection machine have larger construction height adjusting range and can meet the girder erection construction under various special working conditions.

Description

Front supporting leg mechanism of bridge girder erection machine and bridge girder erection machine

Technical Field

The invention relates to the technical field of bridge erecting equipment, in particular to a front supporting leg mechanism of a bridge erecting machine and the bridge erecting machine.

Background

The bridge girder erection machine is special erection equipment for a box girder of a railway bridge or a highway bridge, belongs to the category of cranes, and mainly has the function of lifting a prefabricated box girder and then conveying and placing the box girder at a specified position.

The existing conventional front leg mechanism of the single-main-beam bridge crane has a telescopic function, but can only realize the telescopic function of one layer of column body, the telescopic range is very limited, and certain limitation can exist in the use process under special working conditions. Furthermore, the front support leg structure of the conventional single-main-beam bridge erecting machine mostly adopts a gear and rack driving mode, and the driving mode has the defects of complex structure, high processing difficulty, high manufacturing cost, difficult disassembly and repair and the like. And the conventional single-girder bridge girder erection machine cannot realize the extremely special working condition of girder erection in the tunnel due to the limitation of the height of the conventional front support leg mechanism. Meanwhile, when meeting the special working condition that the lines are juxtaposed, if the parallel construction is needed to be realized, the bridge girder erection machine can only be completely dismantled and then installed on the juxtaposed lines again, the construction efficiency is seriously influenced, and the disassembly and the assembly are very inconvenient.

Disclosure of Invention

The invention solves the problem of how to provide a front support leg mechanism of a bridge girder erection machine and the bridge girder erection machine, increases the height adjusting range of the front support leg mechanism of the bridge girder erection machine, and enables the bridge girder erection machine to meet the girder erection construction under various special working conditions through structural improvement.

In order to solve the above problems, the invention provides a front leg mechanism of a bridge girder erection machine, which comprises an upper telescopic device, a lower telescopic device, an upper fixing device, a lower fixing device and a turnover driving device;

the upper telescopic device comprises an upper outer column body and an upper inner column body; the upper inner column body is used for relatively moving or relatively fixing in the upper outer column body;

the lower telescopic device comprises a lower outer column body and a lower inner column body; the lower inner column body is used for relatively moving or relatively fixing in the lower outer column body;

the bottom of the upper telescopic device is hinged to the top of the lower telescopic device, the upper and lower fixing devices are used for fixing the upper telescopic device and the lower telescopic device relatively, and the overturning driving device is used for driving the lower telescopic device to overturn around the hinging axis of the upper telescopic device and the lower telescopic device.

Furthermore, the upper telescopic device comprises two upper outer columns and two upper inner columns, the two upper outer columns are arranged in parallel, and the two upper inner columns are respectively arranged below the two upper outer columns;

the upper telescopic device also comprises an upper cross beam, a conversion cross beam, an upper telescopic limiting device and an upper telescopic driving device; two ends of the conversion cross beam are respectively and fixedly connected with the bottoms of the two upper outer columns; two ends of the upper cross beam are respectively sleeved on the two upper inner columns; the upper telescopic driving device is arranged on the conversion cross beam and is in driving connection with the upper cross beam; the upper telescopic limiting device is used for relatively fixing the upper inner column and the conversion cross beam and/or relatively fixing the upper inner column and the upper cross beam.

Further, the lower telescopic device comprises two lower outer columns and two lower inner columns, the two lower outer columns are arranged in parallel, and the two lower inner columns are respectively arranged below the two lower outer columns;

the lower telescopic device also comprises a lower cross beam, a bottom cross beam, a lower telescopic limiting device and a lower telescopic driving device; two ends of the lower cross beam are respectively fixedly connected with the bottoms of the two lower outer columns; two ends of the bottom cross beam are respectively and fixedly connected with the bottoms of the two lower inner columns; the lower telescopic driving device is arranged on the lower cross beam and is in driving connection with the bottom cross beam; the lower telescopic limiting device is used for relatively fixing the lower inner column and the lower cross beam.

Further, the conversion beam comprises a conversion beam end and a conversion beam rod; the two ends of the rod part of the conversion cross beam are detachably connected with the end parts of the two conversion cross beams respectively, and the end parts of the two conversion cross beams are fixedly connected with the bottoms of the two upper outer cylinders respectively.

Further, go up telescoping device still includes heavily loaded crossbeam, heavily loaded crossbeam is used for replacing conversion crossbeam pole is in order to bear the weight of the girder of bridging machine.

Furthermore, the upper telescopic device also comprises a top cross beam, and two ends of the top cross beam are respectively detachably connected with the top of the upper outer column body;

the front supporting leg mechanism of the bridge girder erection machine further comprises a hanging assembly arranged on the top beam in a penetrating mode, and the hanging assembly comprises a hanging frame, a transverse moving frame, a connecting frame and a supporting frame; the bottom of the hanging frame and the top of the transverse moving frame are hinged through a spherical hinge seat, and the hanging frame and the transverse moving frame are arranged at the top of the connecting frame and are positioned above the top cross beam; the support frame is fixedly connected with the bottom of the connecting frame and is positioned below the top cross beam.

Further, the support frame comprises an upper support beam, two lower support beams and two side support beams; the two lower supporting beams are horizontally arranged and are parallel to each other, the two side supporting beams are vertically arranged and are parallel to each other, the upper supporting beam is perpendicular to the lower supporting beams, the upper ends of the two side supporting beams are respectively connected with the two ends of the upper supporting beam, and the lower ends of the two side supporting beams are connected with the two lower supporting beams; the upper support beam, the lower support beam and the side support beams are enclosed to form an accommodating space with an opening at the bottom, and the accommodating space is used for accommodating the upper part of a main beam of the bridge girder erection machine;

the side supporting beams are provided with driving gears, the main beams are correspondingly provided with pin shafts, and the driving gears are used for being meshed with the pin shafts; the lower surface of the upper supporting beam is provided with an upper conveyer which is used for walking on the upper surface of the main beam; and a lower moving device is arranged on the upper surface of the lower supporting beam and used for walking on the lower surface of the main beam.

Furthermore, the front support leg mechanism of the bridge girder erection machine further comprises a transverse moving driving mechanism, the transverse moving frame is connected with the top cross beam in a sliding mode, two ends of the transverse moving driving mechanism are respectively connected with the transverse moving frame and the top cross beam, and the transverse moving driving mechanism is used for driving the top cross beam to move transversely along the main beam.

Furthermore, the front leg mechanism of the bridge girder erection machine further comprises a heavy-load transverse moving mechanism, and the heavy-load transverse moving mechanism comprises a transverse moving driving device, a transverse moving sliding seat, a transverse moving track beam and a transverse moving supporting seat; the transverse moving support seat is fixedly connected with the bottom of the lower telescopic device and is used for sliding along the transverse moving track beam; two ends of the transverse moving driving device are respectively fixedly connected with the transverse moving sliding seat and the lower telescopic device; the transverse moving sliding seat is used for moving or fixing on the transverse moving track beam.

In a second aspect, the invention provides a bridge girder erection machine, which comprises the front leg supporting mechanism of the bridge girder erection machine.

The front support leg mechanism of the bridge girder erection machine comprises an upper telescopic device and a lower telescopic device, wherein an upper inner column body and an upper outer column body of the upper telescopic device can be relatively telescopic, and a lower inner column body and a lower outer column body of the lower telescopic device can also be relatively telescopic, so that the telescopic range of the front support leg mechanism of the bridge girder erection machine is enlarged, and the front support leg mechanism of the bridge girder erection machine can be suitable for construction under more special working conditions. Meanwhile, the upper telescopic device and the lower telescopic device can be relatively fixed and relatively overturned, namely, when the front support leg mechanism of the bridge girder erection machine is required to be fixed on the ground, the upper telescopic device and the lower telescopic device can be relatively fixed, and when the front support leg mechanism of the bridge girder erection machine needs to pass through a low space or needs to be constructed in the low space, the lower telescopic device can be upwards overturned, so that the overall height of the front support leg of the whole bridge girder erection machine is further shortened, and the requirement of construction environment is met.

Drawings

FIG. 1 is a schematic structural diagram of a front leg mechanism of a bridge girder erection machine according to an embodiment of the invention;

FIG. 2 is a schematic front view of a front leg mechanism of a bridge girder erection machine according to an embodiment of the invention;

FIG. 3 is a schematic side view of a front leg mechanism of a bridge girder erection machine according to an embodiment of the invention;

FIG. 4 is a schematic front view of a suspension assembly according to an embodiment of the present invention;

FIG. 5 is a schematic side view of a hanger assembly according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a heavy-duty traverse mechanism according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the front leg mechanism of the bridge girder erection machine according to the embodiment of the invention in a state of passing through a double-line tunnel;

FIG. 8 is a schematic diagram of the front leg mechanism of the bridge girder erection machine according to the embodiment of the invention in a state of passing through a single-line tunnel;

fig. 9 is a schematic view of the front leg mechanism of the bridge girder erection machine according to the embodiment of the invention in a state of erecting a girder in a tunnel.

Description of reference numerals:

10. an upper telescopic device; 20. a lower telescoping device; 30. a hanging assembly; 40. a turnover driving device; 50. a heavy-duty traversing mechanism; 60. a main beam; 70. a supporting seat; 80. a traverse driving mechanism;

11. a top cross beam; 12. an upper outer cylinder; 13. converting the beam; 131. converting the beam rod part; 132. converting the end of the cross beam; 14. an automatic latch assembly; 15. an upper telescopic driving device; 16. an upper cross beam; 17. an upper inner cylinder; 171. a second upper limiting hole; 18. a middle cross beam; 19. a heavy-duty beam; 21. a lower outer cylinder; 22. a lower telescopic driving device; 23. a lower cross beam; 24. a lower telescopic limiting device; 25. a lower inner column; 26. a bottom cross member; 31. a hanging frame; 32. a transverse moving frame; 33. a connecting frame; 34. a support frame; 341. an upper support beam; 342. a guide wheel device; 343. a side support beam; 344. a drive gear; 345. an upper conveyer; 346. a downward movement conveyor; 347. a lower support beam; 348. an accommodating space; 349. an anchoring device; 51. traversing the track beam; 52. a sliding seat is transversely moved; 53. a traverse driving device; 54. and (6) transversely moving the supporting seat.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

It should be noted that, at the same time, the terms "first", "second", and the like in the description and the claims of the present invention and the drawings described above are used for distinguishing similar objects and are not necessarily used for describing a specific order or sequence order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

As shown in fig. 1 to 3, the front leg mechanism of the bridge girder erection machine according to the embodiment of the present invention includes an upper telescopic device 10, a lower telescopic device 20, upper and lower fixing devices (not shown), and a turnover driving device 40.

The upper telescopic device 10 comprises an upper outer column 12 and an upper inner column 17; the upper inner cylinder 17 is adapted to move relatively or be fixed relatively within the upper outer cylinder 12.

The lower telescopic device 20 comprises a lower outer column 21 and a lower inner column 25; the lower inner cylinder 25 is adapted to move relatively or be fixed relatively within the lower outer cylinder 21.

The bottom of the upper telescopic device 10 is hinged to the top of the lower telescopic device 20, the upper and lower fixing devices are used for fixing the upper telescopic device 10 and the lower telescopic device 20 relatively, and the overturning driving device 40 is used for driving the lower telescopic device 20 to overturn around the hinging axis of the lower telescopic device 20 and the upper telescopic device 10. The upper and lower fixing devices may be bolts, screws, etc., for example, the bolts may be disposed on the opposite side of the hinge point between the upper telescopic device 10 and the lower telescopic device 20 to fix the upper telescopic device 10 and the lower telescopic device 20, and when the upper telescopic device 10 and the lower telescopic device 20 need to be turned over, the bolts may be taken out.

Specifically, in this embodiment, the upper telescopic device 10 includes two upper outer cylinders 12 and two upper inner cylinders 17, the two upper outer cylinders 12 are disposed in parallel, and the two upper inner cylinders 17 are disposed below the two upper outer cylinders 12, respectively.

The upper telescopic device 10 further comprises an upper cross beam 16, a conversion cross beam 13, an upper telescopic limiting device and an upper telescopic driving device 15; two ends of the conversion cross beam 13 are respectively fixedly connected with the bottoms of the two upper outer cylinders 12; two ends of the upper cross beam 16 are respectively sleeved on the two upper inner columns 17; the upper telescopic driving device 15 is arranged on the conversion cross beam 13 and is in driving connection with the upper cross beam 16; the upper telescopic limiting device is used for relatively fixing the upper inner column 17 and the conversion cross beam 13 and/or relatively fixing the upper inner column 17 and the upper cross beam 16.

The upper telescopic device 10 further comprises a middle cross beam 18 fixedly connected with the bottom of the upper inner column 17. The upper telescopic driving devices 15 are telescopic cylinders, such as hydraulic cylinders or air cylinders, and the number of the upper telescopic driving devices 15 is two, and the two upper telescopic driving devices are respectively arranged at one end of the conversion cross beam 13 close to the upper outer column 12. The upper telescopic limiting device comprises an automatic bolt component 14 and an upper limiting hole. The end portions of the conversion cross beam 13 and the upper cross beam 16 are respectively provided with a first upper limiting hole (not shown), the upper inner column 17 is provided with a plurality of second upper limiting holes 171, and the second upper limiting holes 171 are arranged at intervals along the length direction of the upper inner column 17. The number of the automatic bolt assemblies 14 is four, and the automatic bolt assemblies are respectively arranged at the first upper limiting holes.

Go up telescoping device 10's flexible process as follows, go up flexible drive arrangement 15 extension and make entablature 16 move down, automatic bolt subassembly 14 inserts the bolt in the spacing hole of first spacing hole of entablature 16 and the spacing hole of second of last inner cylinder 17, make entablature 16 and last inner cylinder 17 relatively fixed, go up flexible drive arrangement 15 shrink, outer cylinder 12 moves down in the pulling entablature 16 drive, after moving to the preset distance, automatic bolt subassembly 14 inserts the bolt in the spacing hole of first spacing hole of conversion crossbeam 13 and the spacing hole of second of last inner cylinder 17, will change conversion crossbeam 13 and last inner cylinder 17 relatively fixed, accomplish the flexible of last telescoping device 10. If the upper telescopic driving device 15 cannot move to a preset distance after one telescopic operation, after the conversion cross beam 13 and the upper inner column 17 are relatively fixed, the bolt of the automatic bolt assembly 14 is pulled out from the first limiting hole of the upper cross beam 16 and the second limiting hole of the upper inner column 17, and the steps are repeated until the conversion cross beam 13 and the upper inner column 17 are relatively fixed after the upper inner column 17 climbs to the preset distance.

The lower telescopic device 20 comprises two lower outer cylinders 21 and two lower inner cylinders 25, the two lower outer cylinders 21 are arranged in parallel, and the two lower inner cylinders 25 are respectively arranged below the two lower outer cylinders 21.

The lower telescopic device 20 further comprises a lower cross beam 23, a bottom cross beam 26, a lower telescopic limiting device 24 and a lower telescopic driving device 22; two ends of the lower cross beam 23 are respectively fixedly connected with the bottoms of the two lower outer columns 21; two ends of the bottom cross beam 26 are respectively fixedly connected with the bottoms of the two lower inner columns 25; the lower telescopic driving device 22 is arranged on the lower cross beam 23 and is in driving connection with the bottom cross beam 26; the lower telescopic limiting device 24 is used for fixing the lower inner column 25 and the lower cross beam 23 relatively.

The lower telescopic driving device 22 and the upper telescopic driving device 15 are similar in structure, and the lower telescopic limiting device 24 and the upper telescopic limiting device are similar in structure and are not repeated. The lower telescopic driving device 22 of the present embodiment directly drives the bottom cross beam 26 to realize the extension and contraction of the lower inner column 25, without the multi-step climbing function of the upper telescopic device 10. Because the telescopic distance of the upper telescopic device 10 of the embodiment is long, if the upper telescopic driving device 15 directly drives the middle cross beam 18, the maximum extending distance of the upper telescopic driving device 15 is too long, which may cause the structural reliability of the telescopic driving device to be reduced, and the failure rate of the equipment to be increased. The lower telescopic device 20 has a shorter telescopic distance than the upper telescopic device 10, and can be extended and retracted by directly driving the bottom cross member 26 by the lower telescopic driving device 22. The last telescoping device 10 of this embodiment and lower telescoping device 20 all can realize flexible action, have increaseed the flexible scope of landing leg mechanism before the bridge crane, make its application scope wider, simultaneously, the flexible scope of going up telescoping device 10 is greater than the flexible scope of telescoping device 20 down, is favorable to only can using telescoping device 10 to construct when because of the construction space restriction, makes the landing leg mechanism has bigger adjustable height before the bridge crane, and lower telescoping device 20 turns over the book upwards this moment.

In this embodiment, the turning driving device 40 is an electric hoist, and a driving end of the electric hoist is fixedly connected to the bottom cross beam 26. A support reaction force sensor can be arranged between the lower inner column 25 and the bottom cross beam 26, and the support reaction force sensor is used for detecting the support reaction force of the front support leg mechanism of the bridge erecting machine in real time.

As shown in fig. 2, the conversion beam 13 includes a conversion beam end 132 and a conversion beam rod 131; the two ends of the conversion beam rod part 131 are detachably connected with the two conversion beam end parts 132 respectively, and the two conversion beam end parts 132 are fixedly connected with the bottoms of the upper outer cylinders 12 respectively. The upper telescopic drive 15 is fixed to the transfer beam end 132.

As shown in fig. 9, the upper telescoping device 10 further includes a heavy-duty beam 19, and the heavy-duty beam 19 is used to replace the conversion beam rod 131 to bear the weight of the main beam 60 of the bridge girder erection machine. The heavy-load cross beam 19 is hinged with a main beam 60 of the bridge girder erection machine through a pin shaft.

When the construction is carried out under the working condition that the space height is limited, such as a tunnel, structures at the top of the front supporting leg mechanism of the bridge girder erection machine need to be detached, at the moment, the rod part 131 of the conversion cross beam needs to be detached, and the heavy-load cross beam 19 with stronger supporting capacity is replaced to support the main beam 60 of the bridge girder erection machine. Conversion crossbeam pole portion 131 can dismantle with conversion crossbeam tip 132 and connect and then made things convenient for the dismouting of heavy load crossbeam 19 greatly, when tearing open the change, need not to dismantle conversion crossbeam tip 132, only need with conversion crossbeam pole portion 131 lift off can, also have no influence to the installation of the last flexible drive arrangement 15 of installation on conversion crossbeam tip 132, it is very convenient.

Go up telescoping device 10 still includes top crossbeam 11, the both ends of top crossbeam 11 respectively with go up the top detachable connection of outer column 12. Detachable top beam 11 can make the height range that leg structure was suitable for before the bridge girder erection machine wider, when the required space of construction was not enough, then can dismantle the height of leg mechanism before the bridge girder erection machine in order to reduce to top beam 11.

As shown in fig. 1 to 5, the front leg mechanism of the bridge girder erection machine further includes a hanger assembly 30 penetrating the top beam 11, and the hanger assembly 30 includes a hanger frame 31, a cross frame 32, a connecting frame 33 and a support frame 34; the bottom of the hanging frame 31 and the top of the cross sliding frame 32 are hinged through a spherical hinge seat, and the hanging frame 31 and the cross sliding frame 32 are arranged at the top of the connecting frame 33 and are positioned above the top cross beam 11; the supporting frame 34 is fixedly connected with the bottom of the connecting frame 33 and is located below the top cross beam 11. The hanging frame 31 and the transverse moving frame 32 are hinged by adopting a spherical hinged support, so that deflection at a certain angle can be realized, and the flexible supporting function of the front supporting leg mechanism of the bridge girder erection machine during operation is realized.

As shown in fig. 4 and 5, the support frame 34 includes an upper support beam 341, two lower support beams 347, and two side support beams 343; the two lower support beams 347 are horizontally arranged and parallel to each other, the two side support beams 343 are vertically arranged and parallel to each other, the upper support beam 341 is arranged perpendicular to the lower support beams 347, the upper ends of the two side support beams 343 are respectively connected with the two upper support beams 341, and the lower ends of the two side support beams 343 are respectively connected with the two lower support beams 347; the upper support beam 341, the lower support beam 347 and the side support beam 343 define a receiving space 348 having an opening at the bottom, and the receiving space 348 is used for receiving the upper portion of the main beam 60 of the bridge girder erection machine.

A driving gear 344 is arranged on the side supporting beam 343, a pin shaft is correspondingly arranged on the main beam 60, and the driving gear 344 is used for being meshed with the pin shaft; an upper transfer device 345 is arranged on the lower surface of the upper support beam 341, and the upper transfer device 345 is used for running on the upper surface of the main beam 60; the upper surfaces of the lower support beams 347 are provided with downward movers 346, and the downward movers 346 are used for running on the lower surfaces of the main beams 60.

As shown in fig. 5, in this embodiment, an anchoring device 349 is further disposed on the support frame 34, where the anchoring device 349 includes a driving cylinder and a driving pin drivingly connected to the driving cylinder, and the anchoring device 349 is configured to drive the driving pin to be inserted into the main beam 60 of the bridge girder erection machine, so as to achieve anchoring of the girder erection operation. The driving gear 344 is driven by a driving device to be meshed with the pin shaft, so that the relative motion between the front supporting leg mechanism of the bridge girder erection machine and the main beam 60 of the bridge girder erection machine can be realized, and the longitudinal moving and the complete machine via hole driving of the front supporting leg mechanism of the bridge girder erection machine are realized. For example, when the main beam 60 needs to be moved longitudinally, the front leg mechanism of the bridge girder erection machine is fixed, the lower surface of the main beam 60 abuts against the downward mover 346, and the gear is driven to rotate, so that the longitudinal movement of the main beam 60 is realized. When the front leg mechanism of the bridge girder erection machine needs to be longitudinally moved, the front leg mechanism of the bridge girder erection machine is lifted, other supporting structures are adopted to support the main beam 60, the upper surface of the main beam is abutted to the upper conveyer 345, the gear is driven to rotate, and the longitudinal movement of the front leg mechanism of the bridge girder erection machine is realized. In order to make the longitudinal movement of the main beam 60 and the front leg mechanism of the bridge girder erection machine more stable and reliable, a guide wheel device 342 may be further disposed on the side support beam 343, and the guide wheel device 342 is used for assisting in positioning and guiding the longitudinal movement of the main beam 60 or the front leg mechanism of the bridge girder erection machine on both sides of the main beam 60. The front support leg mechanism of the bridge girder erection machine in the embodiment is provided with a power system, a pin gear transmission mode is adopted, and the driving gear 344 is driven by the motor reducer to be meshed with the pin shaft on the main beam 60, so that the longitudinal moving of the front support leg mechanism of the bridge girder erection machine and the driving of the whole machine via hole are realized. The rack has the advantages of simple integral structure, easy processing, low manufacturing cost and convenient disassembly and maintenance, and particularly, when individual pin shafts are damaged, only the individual damaged pin shafts need to be replaced, so that the whole rack cannot be scrapped, the maintenance cost is saved, and the maintenance efficiency is improved.

As shown in fig. 1 and fig. 2, the front leg mechanism of the bridge girder erection machine further includes a traverse driving mechanism 80, the traverse frame 32 is slidably connected to the top beam 11, two ends of the traverse driving mechanism 80 are respectively connected to the traverse frame 32 and the top beam 11, and the traverse driving mechanism 80 is configured to drive the top beam 11 to move along the transverse direction of the main beam 60.

To reduce wear between the cross frame 32 and the top cross member 11, a wear reducing plate may also be provided at the bottom of the cross frame 32. The traverse driving mechanism 80 in this embodiment is an oil cylinder. The cross sliding frame 32 and the top cross beam 11 in the embodiment adopt a semi-fixed connection mode, so that on one hand, good force transmission and complete machine stability during via hole and beam erecting are ensured, on the other hand, the transverse movement of a front supporting leg mechanism of the bridge girder erection machine can be realized, and the requirement of curve beam erecting is met.

As shown in fig. 6, the front leg supporting mechanism of the bridge girder erection machine further comprises a heavy-load traversing mechanism 50, wherein the heavy-load traversing mechanism 50 comprises a traversing driving device 53, a traversing sliding seat 52, a traversing track beam 51 and a traversing supporting seat 54; the cross sliding support seat 54 is fixedly connected with the bottom of the lower telescopic device 20 and is used for sliding along the cross sliding track beam 51; the two ends of the traverse driving device 53 are respectively fixedly connected with the traverse sliding seat 52 and the lower telescopic device 20; the traverse sliding seat 52 is used for moving or fixing on the traverse rail beam 51. The traverse driving device 53 is an oil cylinder.

When the heavy-load transverse moving mechanism 50 is used for juxtaposing frame beams, the transverse moving track beam 51 is placed on two juxtaposed lines, a plurality of fixing holes are formed in the transverse moving track beam 51 at intervals, connecting holes corresponding to the fixing holes are formed in the transverse moving sliding seat 52, and the transverse moving sliding seat 52 and the transverse moving track beam 51 can be fixedly connected through a bolt mechanism. The heavy-load transverse moving mechanism 50 of the embodiment can meet the operation requirement of the bridge girder erection machine for the parallel girder erection, enlarges the application range of the bridge girder erection machine, and enables the parallel girder erection construction to be easier to operate.

The use method of the front leg mechanism of the bridge girder erection machine in the embodiment under several special working conditions is described as follows:

1. when the tunnel passes through the single-line tunnel and the double-line tunnel: as shown in fig. 7, when the bridge girder passes through the double-track tunnel, the upper telescopic device 10 and the lower telescopic device 20 are contracted to the shortest length state, the fixing function of the upper and lower fixing devices is released, the lower telescopic device 20 is driven by the overturning driving device 40 to be upwards turned along the hinge axis of the upper telescopic device 10, so that the upper telescopic device 10 and the lower telescopic device 20 are in a vertical state, and the overall height of the front leg mechanism of the bridge girder erection machine when the front leg mechanism passes through the tunnel is reduced, and the front leg mechanism can smoothly pass through the tunnel. Fig. 7 a is a schematic front view structural diagram of the front leg mechanism of the bridge girder erection machine when passing through the double-line tunnel, and fig. 7B is a schematic side view structural diagram of the front leg mechanism of the bridge girder erection machine when passing through the double-line tunnel.

As shown in fig. 8, in the single-line tunnel, the lower retractor 20 is completely removed upon contraction of the upper retractor 10 to the minimum length. Fig. 8 a is a schematic front view of the front leg mechanism of the bridge girder erection machine when passing through the single-line tunnel, and fig. 8B is a schematic side view of the front leg mechanism of the bridge girder erection machine when passing through the single-line tunnel (the lower telescopic device 20 is removed).

The structural design of the front landing leg mechanism of the bridge girder erection machine is ingenious, lifting and turning over in a large range can be achieved, the front landing leg mechanism of the bridge girder erection machine can be integrally passed through a single/double-line tunnel without being detached, and only the upper and lower telescopic devices 20 stretch out and draw back and turn over, so that the girder erection efficiency is improved, and the manual labor intensity is reduced.

2. When the girder erection operation in the tunnel: as shown in fig. 9, first, the main beam 60 is moved longitudinally to the right, and then the hanging assembly 30, the top beam 11, the transverse movement driving mechanism 80 and the top beam 11 are removed, so as to obtain the top height and width dimension of the tunnel cross section and leave a height space for the lower frame beam as much as possible; meanwhile, the rod part 131 of the conversion cross beam is removed and replaced by a heavy-load cross beam 19, wherein the heavy-load cross beam 19 is hinged with the main beam 60 of the bridge erecting machine through a pin shaft and is used for bearing the heavy load of the bridge erecting machine. The upper telescopic device 10 extends to a specified height, the lower telescopic device 20 is turned over along the hinge axis of the upper telescopic device 10 at a certain angle, the height space occupied by the lower telescopic device 20 is made available, and the two ends of the bottom of the middle cross beam 18 are additionally provided with supporting seats 70 for supporting the inner frame beam of the tunnel. When the upper telescopic device 10 needs to be moved to the next installation position, the height of the upper telescopic device 10 can be reduced downwards, the detached hanging assembly 30, the top cross beam 11, the transverse moving driving mechanism 80 and the top cross beam 11 are all installed in place, the main beam 60 is driven by the driving gear 344 to longitudinally move in place, and the steps are repeated when the beam is erected. Fig. 9 a is a schematic structural diagram of a front side view of the front support leg mechanism of the bridge girder erection machine during girder erection in the tunnel, and fig. 9B is a schematic structural diagram of a side view of the front support leg mechanism of the bridge girder erection machine during girder erection in the tunnel.

3. When the frame beams are juxtaposed for operation: as shown in fig. 6, the traverse rail beam 51 of the heavy-duty traverse mechanism 50 is placed on two juxtaposed lines, and both ends of the traverse driving device 53 are fixedly connected to the traverse slide 52 and the lower telescopic device 20, respectively. The transverse moving driving device 53 is contracted, the transverse moving sliding seat 52 is fixed with the transverse moving track beam 51 through the bolt mechanism, the transverse moving driving device 53 is extended, so that the front support leg mechanism of the bridge girder erection machine is pushed to move for a certain distance along the transverse moving track beam 51, the relative fixation between the transverse moving sliding seat 52 and the transverse moving track beam 51 is released, the transverse moving driving device 53 is contracted to drive the transverse moving sliding seat 52 to move along the transverse moving track beam 51, the transverse moving sliding seat 52 is fixed with the transverse moving track beam 51, and the steps are repeated until the front support leg mechanism of the bridge girder erection machine is transversely moved in place. The landing leg mechanism before the bridge girder erection machine of this embodiment realizes the sideslip of overline to whole bridge girder erection machine through heavy load sideslip mechanism 50, makes it carry out the operation of double-line juxtaposed frame roof beam under the condition that need not repeated dismouting equipment, has practiced thrift the dismouting time of equipment greatly, makes construction work efficiency higher, and it is more convenient, swift to operate.

Another embodiment of the invention provides a bridge girder erection machine, which comprises the front leg supporting mechanism of the bridge girder erection machine.

The front support leg mechanism of the bridge girder erection machine and the bridge girder erection machine can meet the girder erection construction operation under various special working conditions such as single line, double lines, small curves, tunnels, line juxtaposition and the like, the equipment is more convenient and quicker to operate during girder erection construction, the construction efficiency is greatly improved, the manual labor is reduced, the applicable scene of the bridge girder erection machine is wider, and the girder erection construction cost is effectively reduced.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. A front leg mechanism of a bridge girder erection machine is characterized by comprising an upper telescopic device (10), a lower telescopic device (20), an upper and lower fixing device and a turnover driving device (40);

the upper telescopic device (10) comprises an upper outer column body (12) and an upper inner column body (17); the upper inner column (17) is used for relatively moving or relatively fixing in the upper outer column (12);

the lower telescopic device (20) comprises a lower outer column body (21) and a lower inner column body (25); the lower inner cylinder (25) is used for relative movement or relative fixation inside the lower outer cylinder (21);

the bottom of the upper telescopic device (10) is hinged to the top of the lower telescopic device (20), the upper fixing device and the lower fixing device are used for fixing the upper telescopic device (10) and the lower telescopic device (20) relatively, and the overturning driving device (40) is used for driving the lower telescopic device (20) to overturn around the hinging axis of the upper telescopic device (10).

2. The front leg mechanism of the bridge girder erection machine according to claim 1, wherein said upper telescopic device (10) comprises two said upper outer columns (12) and two said upper inner columns (17), said two said upper outer columns (12) being arranged in parallel, said two said upper inner columns (17) being respectively arranged below said two said upper outer columns (12);

the upper telescopic device (10) further comprises an upper cross beam (16), a conversion cross beam (13), an upper telescopic limiting device and an upper telescopic driving device (15); two ends of the conversion cross beam (13) are respectively fixedly connected with the bottoms of the two upper outer cylinders (12); two ends of the upper cross beam (16) are respectively sleeved on the two upper inner columns (17); the upper telescopic driving device (15) is arranged on the conversion cross beam (13) and is in driving connection with the upper cross beam (16); the upper telescopic limiting device is used for relatively fixing the upper inner column body (17) and the conversion cross beam (13) and/or relatively fixing the upper inner column body (17) and the upper cross beam (16).

3. The front leg mechanism of the bridge girder erection machine according to claim 1, wherein said lower telescoping device (20) comprises two of said lower outer columns (21) and two of said lower inner columns (25), said two of said lower outer columns (21) being arranged in parallel, said two of said lower inner columns (25) being respectively arranged below said two of said lower outer columns (21);

the lower telescopic device (20) also comprises a lower cross beam (23), a bottom cross beam (26), a lower telescopic limiting device (24) and a lower telescopic driving device (22); two ends of the lower cross beam (23) are respectively fixedly connected with the bottoms of the two lower outer columns (21); two ends of the bottom cross beam (26) are respectively and fixedly connected with the bottoms of the two lower inner columns (25); the lower telescopic driving device (22) is arranged on the lower cross beam (23) and is in driving connection with the bottom cross beam (26); the lower telescopic limiting device (24) is used for fixing the lower inner column body (25) and the lower cross beam (23) relatively.

4. A front leg mechanism of a bridge girder erection machine according to claim 2, wherein said conversion beam (13) comprises a conversion beam end portion (132) and a conversion beam rod portion (131); the two ends of the conversion cross beam rod part (131) are detachably connected with the two conversion cross beam end parts (132), and the two conversion cross beam end parts (132) are fixedly connected with the bottoms of the upper outer columns (12) respectively.

5. A front leg mechanism of a bridge girder erection machine according to claim 4, wherein said upper telescopic device (10) further comprises a heavy-duty beam (19), said heavy-duty beam (19) being used instead of said conversion beam rod portion (131) to bear the weight of a main beam (60) of the bridge girder erection machine.

6. The front leg mechanism of the bridge girder erection machine according to claim 2, wherein said upper telescoping device (10) further comprises a top beam (11), both ends of said top beam (11) are detachably connected with the top of said upper outer column (12), respectively;

the front supporting leg mechanism of the bridge girder erection machine further comprises a hanging assembly (30) penetrating through the top cross beam (11), wherein the hanging assembly (30) comprises a hanging frame (31), a transverse moving frame (32), a connecting frame (33) and a supporting frame (34); the bottom of the hanging rack (31) is hinged with the top of the transverse moving rack (32) through a spherical hinge seat, and the hanging rack (31) and the transverse moving rack (32) are arranged at the top of the connecting rack (33) and are positioned above the top cross beam (11); the support frame (34) is fixedly connected with the bottom of the connecting frame (33) and is positioned below the top cross beam (11).

7. A bridge girder erection machine front leg mechanism according to claim 6, wherein the support frame (34) comprises an upper support beam (341), two lower support beams (347) and two side support beams (343); the two lower supporting beams (347) are horizontally arranged and are parallel to each other, the two side supporting beams (343) are vertically arranged and are parallel to each other, the upper supporting beam (341) is arranged perpendicular to the lower supporting beams (347), the upper ends of the two side supporting beams (343) are respectively connected with the two ends of the upper supporting beam (341), and the lower ends of the two side supporting beams (343) are respectively connected with the two lower supporting beams (347); the upper support beam (341), the lower support beam (347) and the side support beams (343) form a containing space (348) with an opening at the bottom, and the containing space (348) is used for containing the upper part of a main beam (60) of the bridge girder erection machine;

a driving gear (344) is arranged on the side supporting beam (343), a pin shaft is correspondingly arranged on the main beam (60), and the driving gear (344) is used for being meshed with the pin shaft; an upper transfer device (345) is arranged on the lower surface of the upper supporting beam (341), and the upper transfer device (345) is used for walking on the upper surface of the main beam (60); the upper surface of the lower supporting beam (347) is provided with a downward moving device (346), and the downward moving device (346) is used for running on the lower surface of the main beam (60).

8. The front leg mechanism of bridge girder erection machine according to claim 6, further comprising a traverse driving mechanism (80), wherein the traverse frame (32) is slidably connected with the top beam (11), both ends of the traverse driving mechanism (80) are respectively connected with the traverse frame (32) and the top beam (11), and the traverse driving mechanism (80) is used for driving the top beam (11) to move along the transverse direction of the main beam (60).

9. A front leg mechanism of a bridge girder erection machine according to any one of claims 1 to 8, further comprising a heavy-duty traverse mechanism (50), wherein the heavy-duty traverse mechanism (50) comprises a traverse driving device (53), a traverse sliding seat (52), a traverse rail beam (51) and a traverse supporting seat (54); the transverse moving support seat (54) is fixedly connected with the bottom of the lower telescopic device (20) and is used for sliding along the transverse moving track beam (51); two ends of the transverse moving driving device (53) are respectively and fixedly connected with the transverse moving sliding seat (52) and the lower telescopic device (20); the transverse moving sliding seat (52) is used for moving or fixing on the transverse moving track beam (51).

10. An bridging machine comprising a front leg mechanism of the bridging machine of any one of claims 1 to 9.

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