Transformation support assembly and transformation beam taking method for bridge crane under ultra-low working condition

Abstract

The invention relates to the technical field of high-speed rail girder erection auxiliary equipment, in particular to a conversion supporting assembly and a conversion girder taking method for an ultra-low working condition of a bridge crane. The lifting portal frame is arranged between the two stand columns in a crossing mode; the lifting oil cylinder is fixed at the end part of the lifting door frame and drives the lifting door frame to do lifting motion relative to the upright post; all the conversion supporting devices ascend and descend synchronously, and the conversion supporting devices are used for transversely straddling the lifting portal frame on the top face of a beam transporting vehicle and longitudinally moving along with the vehicle under the ultra-low working condition and are further used for supporting beam pieces at the ultra-low position to provide a beam taking gap needed by a bridge crane; the conversion supporting device is used for jacking the beam piece to be separated from the beam transporting vehicle under the high-position working condition. According to the conversion supporting assembly and the conversion beam taking method, the integral type conversion supporting device is adopted, enough beam taking gaps can be provided, the conversion supporting assembly can move along with a beam transporting vehicle, supporting is stable and flexible, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed railway beam erection auxiliary equipment, and in particular to a conversion support assembly and a conversion beam taking method for an ultra-low-position working condition of a bridge crane. Background Art

[0002] As the scale of high-speed rail construction continues to expand, the terrain, geology, and environmental conditions involved are becoming increasingly complex. High-speed rail lines often encounter height restrictions, such as gantries. In some cases, these conditions require the overhead crane to operate at a low position. When the beam transport vehicle arrives with the beam segments, the crane's main beam is too close to the segments, making it impossible for the crane's trolley to move across the main beam to retrieve the beam.

[0003] In the related art, in order to solve the above problems, Chinese patent CN109610318A proposes a technical solution for a low-position lifting trolley of a bridge crane. By modifying the structure of the lifting trolley and lowering the height of the lifting trolley itself, the overall height of the bridge crane is reduced to a certain extent, so that even if the main beam and beam piece of the bridge crane are very close, the lifting trolley can be used to move horizontally on the main beam of the bridge crane to take the beam.

[0004] However, the technical solution of the low-position crane trolley for the bridge crane requires the modification of the crane trolley sling, which has the following disadvantages:

[0005] (1) Under some special working conditions, the main beam of the bridge crane is too close to the beam piece. Under the premise of meeting the lifting weight, the height that the lifting trolley hoist can reduce is limited. At this time, it is still impossible to solve the problem of being unable to remove the beam due to the small gap between the beams, and it is impossible to carry out the modification.

[0006] (2) Even if the gap between the main beam and the beam of the bridge crane can meet the requirement of lowering the height of the sling, its lifting capacity will inevitably be reduced. Before the modification, the crane sling was a common sling for single and double lines. It can lift double-line beams (generally 1,000 tons) and single-line beams (generally 450 tons) at the same time. The single and double line switching can be achieved by simply changing the position of the boom. Ultra-low beam erection is generally a single-line beam erection condition. At this time, in order to solve the beam gap problem, the crane sling is modified, which reduces the load-bearing capacity of the modified sling. At this time, when erecting double-line beams, a new set of double-line slings needs to be made to meet the 1,000-ton beam erection requirement. This increases manufacturing costs, and replacing slings is time-consuming and labor-intensive, which seriously affects construction efficiency and progress. At the same time, the replacement of slings on the bridge greatly increases construction risks. Summary of the Invention

[0007] The present application provides a conversion support assembly and a conversion beam removal method for the ultra-low working condition of a bridge crane, which improves construction efficiency, saves time and material costs, and can provide sufficient beam removal clearance.

[0008] In a first aspect, an embodiment of the present application provides a conversion support assembly for an ultra-low position working condition of a bridge crane, wherein the conversion support assembly comprises an even number of conversion support devices, wherein the conversion support device comprises:

[0009] two vertically spaced columns;

[0010] A lifting gantry is arranged between the two columns, and the length of the lifting gantry is greater than the width of the beam transport vehicle;

[0011] A lifting cylinder is fixed to the end of the lifting gantry and drives the lifting gantry to move up and down relative to the column;

[0012] All conversion support devices are raised and lowered synchronously. The conversion support device is used to place the lifting gantry horizontally across the top surface of the beam transport vehicle in ultra-low working conditions and move longitudinally with the vehicle. It is also used to support the beam pieces in ultra-low positions to provide the beam removal clearance required by the bridge crane; the conversion support device is used to lift the beam pieces and separate them from the beam transport vehicle in high working conditions.

[0013] In combination with the first aspect, in one embodiment, the lifting gantry includes a connecting beam and an outer sleeve structure arranged at both ends of the connecting beam, the outer sleeve structure is sleeved on the column and the outer sleeve structure slides along the column under the action of the lifting cylinder; the outer sleeve structure is fixed to the column by a pin in the ultra-low working condition and the high working condition.

[0014] In combination with the first aspect, in one embodiment, the outer sleeve structure is provided with a door frame pin hole, the column is provided with a high-position pin hole, and an ultra-low-position pin hole, and the pin is passed through and fixed in the door frame pin hole, and the high-position pin hole or the ultra-low-position pin hole.

[0015] In combination with the first aspect, in one embodiment, the conversion support device further includes a base and a cylinder seat, the bottom end of the column is vertically fixed to the base; side triangle plates are provided on both sides of the outer sleeve structure, and the cylinder seat is provided on the top surface of the base in a vertically opposite position relative to the side triangle plates;

[0016] A part of the fixed part or the telescopic part of the lifting oil cylinder is fixed to the oil cylinder seat, and the other part is fixed to the side triangle plate.

[0017] In combination with the first aspect, in one embodiment, a seat connecting plate is provided on the top surface of the base, a horizontal column connecting plate is fixedly provided on the bottom end of the column, and the column connecting plate and the cylinder seat are both fixed to the seat connecting plate by bolts.

[0018] In combination with the first aspect, in one embodiment, a positioning groove is provided at the bottom of the base, and the positioning groove is used to engage with a pre-set positioning boss of the erected box beam.

[0019] In combination with the first aspect, in one embodiment, the lifting gantry has a concave groove for accommodating the beam piece, and a rubber pad is provided between the top surface of the concave groove and the beam piece.

[0020] In a second aspect, an embodiment of the present application provides a method for converting and removing beams based on the above-mentioned conversion support assembly, comprising the following steps:

[0021] The conversion support device is in an ultra-low position, the lifting gantry is laterally placed across the top surface of the beam transport vehicle and moves longitudinally with the vehicle, and the beam piece is placed on the beam transport vehicle; at this time, the bottom surface of the column is suspended relative to the top surface of the erected box beam, the two columns are respectively located on both sides of the beam transport vehicle in the transverse direction of the bridge, and the bottom surface of the lifting gantry is in close contact with the load-bearing top surface of the beam transport vehicle;

[0022] After reaching the designated position, the lifting gantry remains stationary, and the column is driven downward by the lifting cylinder until the bottom surface of the column contacts the top surface of the erected box beam. The column remains stationary, and the lifting gantry lifts the beam piece upward to the high position, and the beam piece is separated from the beam transport vehicle;

[0023] When the beam transport vehicle drives away, the lifting gantry is lowered to an ultra-low position by the action of the lifting cylinder.

[0024] In conjunction with the second aspect, in one embodiment, when the lifting gantry is laterally placed across the top surface of the beam transport vehicle and moves longitudinally with the vehicle, it includes:

[0025] The conversion support device and the beam transport vehicle are rigidly connected by a connecting rod;

[0026] When the lifting gantry lifts the beam piece upward to the high position working condition, it includes:

[0027] The connecting rod is disassembled and the conversion support device and the beam transport vehicle are separated.

[0028] In combination with the second aspect, in one embodiment, the lifting gantry includes a connecting beam and an outer sleeve structure provided at both ends of the connecting beam, the outer sleeve structure being sleeved on the column and sliding along the column under the action of the lifting cylinder; the conversion support device further includes a base, the bottom end of the column being vertically fixed to the base; the outer sleeve structure is provided with a gantry pin hole, the column is provided with a high-position pin hole and an ultra-low-position pin hole; and a positioning groove is provided at the bottom of the base;

[0029] In the ultra-low position working condition, the latch is fixed through the latch hole of the door frame and the ultra-low position latch hole;

[0030] In high-position working condition, the latch is fixed through the latch hole of the door frame and the high-position latch hole;

[0031] When the conversion support device moves longitudinally with the vehicle, it includes:

[0032] The bottom surface of the base is suspended relative to the top surface of the erected box beam;

[0033] The column is driven by the lifting cylinder to move downward until the bottom surface of the column contacts the top surface of the erected box beam, comprising:

[0034] Move downward until the bottom surface of the base contacts the top surface of the erected box beam, and the positioning groove of the base engages with the pre-set positioning boss of the erected box beam.

[0035] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0036] 1. The conversion support assembly of the application is provided with an even number of conversion support devices, and the lifting cylinders of all the conversion support devices perform synchronous lifting and lowering movements, which are used to place the lifting gantry horizontally across the top surface of the beam transport vehicle and move longitudinally with the vehicle in ultra-low working conditions (corresponding to the moving state of the conversion support device). There is no need to carry out non-standard modifications to large equipment such as the beam transport vehicle and / or the bridge crane. Simply adding a conversion support assembly can realize the normal operation of the bridge crane at a low position, and it can move with the vehicle, which is convenient and fast; the conversion support device is used to support the beam piece at an ultra-low position to provide the beam removal gap required by the bridge crane (corresponding to the state of the conversion support device supporting the beam piece alone at an ultra-low position); the conversion support device is used to lift the beam piece off the beam transport vehicle in a high-position working condition (corresponding to the state of the conversion support device supporting the beam piece at a high position to separate the beam piece from the beam transport vehicle). The conversion support assembly of the present application can separate the beam transport vehicle and the beam piece through high-position support, can facilitate transportation through ultra-low position support, and provide sufficient beam removal gap, and the beam removal connection is comfortable. The conversion support assembly of the present application greatly saves costs and construction time. The conversion support assembly enables the bridge crane to reach a lower position than all existing low-position technical solutions, providing the lifting trolley with sufficient clearance to remove the beams.

[0037] 2. The conversion beam-taking method of the present application maintains an ultra-low position while the conversion support device moves, and moves in mid-air. The movement is efficient and can be easily moved to the designated position. Afterwards, the lifting gantry does not move, allowing the column to contact the top surface of the erected box beam under the action of the lifting cylinder. Afterwards, the column does not move, and the lifting gantry lifts the beam piece upward to a high position, and the beam piece is separated from the beam transport vehicle, and the beam transport vehicle drives away. Finally, the lifting gantry is lowered to an ultra-low position under the action of the lifting cylinder. The entire process of the conversion beam-taking method is, in sequence, ultra-low position suspension transportation, contact with the top surface of the erected box beam, lifting the beam piece to a high position and the beam transport vehicle drives away, and descending to an ultra-low position. The purpose of transportation and the ultimate purpose of supporting the beam piece in an ultra-low position are perfectly achieved through multiple lifting operations, solving the problem of insufficient clearance for beam removal under the ultra-low position of the bridge crane, and the inability of the lifting trolley to remove the beam. This greatly reduces construction time and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A diagram showing the positional relationship between the conversion support assembly, beam transport vehicle, beam piece, gantry, and bridge crane provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a crane trolley taking a beam when the conversion support assembly according to an embodiment of the present application independently supports a beam piece;

[0041] Figure 3 A schematic structural diagram of a conversion support device provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of the structure of the lifting gantry provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of the structure of the column provided in the embodiment of the present application;

[0044] Figure 6 A schematic structural diagram of a base provided in an embodiment of the present application;

[0045] Figure 7 A top view of a partial body and a conversion support device of a beam transport vehicle provided in an embodiment of the present application;

[0046] Figure 8 A schematic cross-sectional view of a conversion support device for ultra-low transport of a beam transport vehicle provided in an embodiment of the present application;

[0047] Figure 9 A schematic cross-sectional view of a single supporting beam of an ultra-low position conversion support device provided in an embodiment of the present application;

[0048] Figure 10 A schematic cross-sectional view of a high-position conversion support device independently supporting a beam piece provided in an embodiment of the present application;

[0049] In the figure: 100, bridge crane; 101, beam; 102, beam transporter; 103, gantry; 104, erected box beam; 1001, lifting trolley; 105, positioning boss; 1, conversion support device; 11, column; 12, lifting gantry; 13, base; 14, rubber pad; 15, lifting cylinder; 16, latch; 17, cylinder seat; 121, outer sleeve structure; 122, connecting beam; 1211, column through hole; 1212, gantry latch hole; 1213, side triangle plate; 111, guide bar; 112, high-position latch hole; 113, ultra-low-position latch hole; 114, column connecting plate; 131, seat connecting plate; 132, positioning groove. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] First, let me introduce the relevant background. When constructing high-speed railway lines, there are working conditions with height restrictions such as tunnels and gantries. The bridge crane 100 needs to be lowered to a low-position working condition. At this time, after the beam transport vehicle 102 carries the beam piece 101, the main beam of the bridge crane 100 and the beam piece 101 are too close to each other. At this time, the lifting trolley 1001 on the bridge crane 100 cannot move horizontally on the main beam of the bridge crane to take the beam. Therefore, it is necessary to expand the gap between the bridge crane 100 and the beam piece 101 under the low-position working condition to facilitate the removal of the beam.

[0052] The conversion support assembly of the present application solves the problem in the prior art that the high-speed railway line is erected at a limited height (such as a gantry) and the crane trolley is unable to remove beams when the bridge crane is working in an ultra-low position. The operation of removing and erecting beams by the crane trolley can be completed only through the conversion support assembly, saving time and manpower, improving construction efficiency, and accelerating construction progress.

[0053] First, as Figures 1 to 6 As shown, the present application discloses a transfer support assembly for ultra-low-position operation of a bridge crane. The transfer support assembly includes an even number of transfer support devices 1. Each even number of transfer support devices 1 operates in conjunction with a beam transport vehicle 102. Specifically, during actual construction, half of the transfer support devices 1 are installed on the front beam-carrying trolley of the beam transport vehicle 102, and the other half are installed on the rear beam-carrying trolley of the beam transport vehicle 102.

[0054] Each conversion support device 1 includes a lifting gantry 12 , a lifting cylinder 15 and two columns 11 .

[0055] The two columns 11 are arranged vertically at intervals and are located on both sides of the transverse bridge of the beam transport vehicle 102. The lifting gantry 12 is arranged between the two columns 11. The length of the lifting gantry 12 is greater than the width of the beam transport vehicle 102 (see FIG. Figure 7 ).

[0056] The lifting cylinder 15 is fixed to the end of the lifting gantry 12 and drives the lifting gantry 12 to move up and down relative to the column 11. Two positions of the lifting gantry 12 relative to the column 11 correspond to the ultra-low position and high position working conditions of the conversion support device 1.

[0057] All conversion support devices 1 are raised and lowered synchronously, and the lifting cylinders 15 of all conversion support devices 1 are raised and lowered synchronously. The conversion support device 1 is used to place the lifting gantry 12 horizontally across the top surface of the beam transport vehicle 102 in the ultra-low position working condition and move longitudinally with the vehicle (corresponding to the moving state of the conversion support device 1). It is also used to support the beam piece 101 in the ultra-low position to provide the bridge crane 100 with the required beam removal clearance (corresponding to the state of the conversion support device 1 supporting the beam piece alone in the ultra-low position); the conversion support device 1 is used to lift the beam piece 101 off the beam transport vehicle 102 in the high position working condition (corresponding to the state of the conversion support device supporting the beam piece at the high position to separate the beam piece from the beam transport vehicle).

[0058] Preferably, the beam transport vehicle 102 is divided into a front beam-carrying trolley and a rear beam-carrying trolley, and the number of the even-numbered conversion support devices 1 is two, and the two conversion support devices 1 correspond to the front beam-carrying trolley and the rear beam-carrying trolley respectively at the beginning of work.

[0059] Specifically, in the ultra-low position, the height of the supporting beam piece 101 of the lifting gantry 12 is much lower than the height of the supporting beam piece 101 of the beam transport vehicle.

[0060] The conversion support assembly of the present application is provided with an even number of conversion support devices 1, and the lifting cylinders 15 of all the conversion support devices 1 perform synchronous lifting and lowering movements, and are used to place the lifting gantry 12 transversely across the top surface of the beam transport vehicle 102 in the ultra-low position working condition and move it longitudinally with the vehicle (corresponding to the moving state of the conversion support device 1). There is no need to carry out non-standard modification of large equipment such as the beam transport vehicle 102 and / or the bridge crane 100. Simply adding a conversion support assembly can realize the normal operation of the bridge crane 100 at a low position, and it can move with the vehicle, which is convenient and fast. Device 1 is used to support the beam piece 101 at an ultra-low position to provide the bridge crane 100 with the required beam removal clearance (corresponding to the state of the conversion support device 1 supporting the beam piece alone at an ultra-low position); the conversion support device 1 is used to lift the beam piece 101 and separate it from the beam transport vehicle 102 in the high-position working condition (corresponding to the state of the conversion support device supporting the beam piece at a high position to separate the beam piece from the beam transport vehicle). The conversion support assembly of the present application can separate the beam transport vehicle 102 and the beam piece 101 through high-position support, can facilitate transportation through ultra-low position support, and provide sufficient beam removal clearance, and the beam removal connection is comfortable.

[0061] The conversion support assembly of the present application greatly saves construction costs and construction time. The conversion support assembly enables the bridge crane to reach a lower position than all existing low-position technical solutions, providing the lifting trolley with sufficient clearance to remove the beams.

[0062] Specifically, the ultra-low position working condition of the present application can make the bridge crane 100 reach a lower position than all existing low-position technical solutions, so it is named the ultra-low position working condition. The conversion support assembly of the present application has been verified in the application of the bridge crane 100 with a conventional working weight of 1,000 tons, which greatly saves construction time and construction costs, has a large gap, and is comfortable for beam connection.

[0063] like Figure 4 As shown, in one embodiment, the lifting gantry 12 includes a connecting beam 122 and outer sleeve structures 121 disposed at both ends of the connecting beam 122. Specifically, the connecting beam 122 and the outer sleeve structure 121 are secured by welding. The outer sleeve structure 121 is sleeved onto the column 11 and slides along the column 11 under the action of the lifting cylinder 15. The outer sleeve structure 121 is secured to the column 11 by a latch 16 in both the ultra-low and high operating positions.

[0064] Specifically, the outer sleeve structure 121 is provided with a column hole 1211 for the column 11 to pass through the column hole 1211. Preferably, the outer wall of the outer sleeve structure 121 is provided with a plurality of reinforcing ribs to improve rigidity and strength.

[0065] The conversion support assembly of the present application, the lifting door frame 12 includes a connecting beam 122 and an outer sleeve structure 121. The outer sleeve structure 121 is mounted on the column 11 and the outer sleeve structure 121 slides along the column 11 under the action of the lifting cylinder 15. On the basis of sliding, the outer sleeve structure 121 is fixed to the column 11 by the pin 16 at two special positions, the ultra-low working condition and the high working condition, to achieve the effect of stable rigid support. The up and down lifting and stable support are convenient and fast, and the construction is efficient.

[0066] like Figure 5 As shown, further, in one embodiment, the outer sleeve structure 121 is provided with a mast latch hole 1212, and the column 11 is provided with a high-position latch hole 112 corresponding to the high-position working condition and an ultra-low-position latch hole 113 corresponding to the ultra-low-position working condition. The latch 16 is inserted and fixed in the mast latch hole 1212, the high-position latch hole 112, or the ultra-low-position latch hole 113.

[0067] Specifically, when the outer sleeve structure 121 is raised and lowered along the column 11 until the mast latch hole 1212 and the high-position latch hole 112 are aligned, the latch 16 is passed through and fixed to the mast latch hole 1212 and the high-position latch hole 112, stabilizing the high-position working condition. When the outer sleeve structure 121 is raised and lowered along the column 11 until the mast latch hole 1212 and the ultra-low-position latch hole 113 are aligned, the latch 16 is passed through and fixed to the mast latch hole 1212 and the ultra-low-position latch hole 113, stabilizing the ultra-low-position working condition.

[0068] The conversion support assembly of the present application has an outer sleeve structure 121 provided with a door frame pin hole 1212, and a column 11 provided with a high-position pin hole 112 corresponding to a high-position working condition, and an ultra-low-position pin hole 113 corresponding to an ultra-low-position working condition, which can stably fix the pins on the basis of up and down lifting.

[0069] Preferably, the upright post 11 is a square post with guide bars 111 positioned at each corner. The outer sleeve structure 121 slides up and down along these guide bars 111, which enhance the rigidity and strength of the upright post 11 and improve the stability of the lift. The upright post 11 supports the mast, and the mast 12 moves along these guide bars 111 under the tension of the lift cylinder 15.

[0070] like Figure 3 As shown, further, in one embodiment, the conversion support device 1 further includes a base 13 and a cylinder seat 17 , and the bottom end of the column 11 is vertically fixed to the base 13 .

[0071] Side triangular plates 1213 are provided on both sides of the outer sleeve structure 121 , and the cylinder seat 17 is provided on the top surface of the base 13 at a vertically opposite position to the side triangular plates 1213 .

[0072] One part of the fixed portion or the telescopic portion of the lifting cylinder 15 is fixed to the cylinder seat 17 , and the other part is fixed to the side triangular plate 1213 .

[0073] The conversion support assembly of the present application has a part of the fixed part or the telescopic part of the lifting cylinder 15 fixed to the cylinder seat 17, and the other part is fixed to the side triangle plate 1213. Therefore, when the lifting cylinder 15 is working, the outer sleeve structure 121 slides on the column 11 to realize the position conversion between the high-position working condition and the ultra-low-position working condition.

[0074] like Figure 5 and Figure 6 As shown, further, in one embodiment, a seat connecting plate 131 is provided on the top surface of the base 13, a horizontal column connecting plate 114 is fixedly provided on the bottom end of the column 11, and the column connecting plate 114 and the cylinder seat 17 are both fixed to the seat connecting plate 131 by bolts.

[0075] like Figure 3 and Figure 6As shown, in one embodiment, a positioning groove 132 is provided at the bottom of the base 13 , and the positioning groove 132 is used to engage with the positioning boss 105 pre-set on the erected box beam 104 .

[0076] In the conversion support assembly of the present application, the positioning groove 132 of the base 13 engages with the pre-set positioning boss 105 of the erected box beam 104, and the positioning boss 105 is pre-set at a specific position. The cooperation of the two can play a role of stable support.

[0077] like Figure 4 As shown, in one embodiment, the lifting gantry 12 has a concave groove for accommodating the beam piece 101, and a rubber pad 14 is provided between the top surface of the concave groove and the beam piece 101. The rubber pad 14 can protect the beam piece 101 and prevent the beam piece 101 from being damaged.

[0078] The conversion support assembly of the present application, the conversion support device 1 is composed of a lifting gantry 12, a column 11, a base 13, a lifting cylinder 15, a latch 16 and a cylinder seat 17. The conversion support device 1 has two working positions, a high position and an ultra-low position. After the lifting cylinder 15 is lifted and lowered into place, the lifting gantry 12 needs to be fixed with the latch 16. The conversion support device 1 is placed in a fixed position on the beam transport vehicle 102. When moving, it is rigidly connected to the beam trolley of the beam transport vehicle 102 by a connecting rod, and the longitudinal movement is driven by the power of the beam trolley. When the bridge crane 100 is performing ultra-low limit beam erection, after using the front and rear two sets of conversion supports to support the high-position beam piece, the beam transport vehicle 102 withdraws, and the conversion support assembly is converted to a low-position working state, which is convenient for the bridge crane crane trolley to lift the beam piece.

[0079] In a second aspect, the present application discloses a method for converting beams based on the above-mentioned conversion support assembly, comprising the following steps:

[0080] The conversion support device 1 is in the ultra-low position, and the lifting gantry 12 is placed horizontally across the top surface of the beam transport vehicle 102 and moves longitudinally with the vehicle (see Figure 7 and Figure 8 ), the beam piece 101 is placed on the beam transport vehicle 102. Specifically, half of the conversion support device 1 is set on the front beam-carrying trolley of the beam transport vehicle 102, and the other half of the conversion support device 1 is set on the front beam-carrying trolley of the beam transport vehicle 102. At this time, the bottom surface of the column 11 is suspended relative to the top surface of the erected box beam 104, and the two columns 11 are respectively located on both sides of the transverse bridge of the beam transport vehicle 102, and the bottom surface of the lifting gantry 12 is close to the load-bearing top surface of the beam transport vehicle 102. Specifically, when the conversion support device 1 moves longitudinally with the vehicle, the lowest position of the conversion support device 1 is suspended relative to the top surface of the erected box beam 104, which is convenient for transportation and movement.

[0081] After reaching the designated position, the lifting gantry 12 does not move, and the column 11 moves downward under the action of the lifting cylinder 15 until the bottom surface of the column 11 contacts the top surface of the erected box beam 104; the column 11 does not move, and the lifting gantry 12 lifts the beam piece 101 upward to the high position working condition (see Figure 10 ), the beam piece 101 is separated from the beam transport vehicle 102, and the beam transport vehicle 102 drives away.

[0082] The lifting gantry 12 is lowered to the ultra-low position under the action of the lifting cylinder 15 (see Figure 9 ), the gap required for the lifting trolley 1001 to remove the beam is provided between the top surface of the beam 101 and the bridge crane 100.

[0083] The conversion beam-taking method of the present application maintains an ultra-low position when the conversion support device 1 moves, and moves in mid-air. The movement is efficient and can be conveniently moved to the specified position. Afterwards, the lifting gantry 12 does not move, allowing the column 11 to contact the top surface of the erected box beam 104 under the action of the lifting cylinder 15. Afterwards, the column 11 does not move, and the lifting gantry 12 lifts the beam piece 101 upward to the high position, and the beam piece 101 is separated from the beam transport vehicle 102, and the beam transport vehicle 102 drives away. Finally, the lifting gantry 12 is lowered to the ultra-low position under the action of the lifting cylinder 15. The entire process of converting the beam-removing method is, in sequence, ultra-low-position suspended transportation, contact with the top surface of the erected box beam 104, lifting the beam piece 101 to a high position and the beam transport vehicle driving away, and descending to an ultra-low position. Through multiple lifts, the transportation purpose and the ultimate ultra-low-position supporting purpose of the beam piece 101 are perfectly achieved, solving the problem that the lifting trolley cannot remove the beam due to insufficient clearance for removing the beam under the ultra-low-position working condition of the bridge crane, greatly shortening the construction time and reducing the construction cost.

[0084] Furthermore, when the lifting gantry 12 is laterally placed across the top surface of the beam transport vehicle 102 and moves with the vehicle, it includes:

[0085] The conversion support device 1 is rigidly connected to the beam transport vehicle 102 through a connecting rod. The conversion support device 1 is placed in a fixed position on the beam transport vehicle. When moving, it relies on the rigid connection with the beam carrying trolley with a connecting rod to form a stable connection relationship, and uses the power of the beam carrying trolley to drive the longitudinal movement.

[0086] When the lifting gantry 12 lifts the beam 101 to the high position, the following steps are included:

[0087] The connecting rod is disassembled, the conversion support device 1 and the beam transport vehicle 102 are separated, and the beam transport vehicle 102 drives away. The purpose of stable transportation and disassembly and separation is achieved through the detachable connecting rod.

[0088] Furthermore, in one embodiment, the mast 12 includes a connecting beam 122 and outer sleeve structures 121 disposed at both ends of the connecting beam 122. Specifically, the connecting beam 122 and the outer sleeve structure 121 are secured by welding. The outer sleeve structure 121 is sleeved onto the column 11 and slides along the column 11 under the action of the lifting cylinder 15. The outer sleeve structure 121 is secured to the column 11 via a latch 16 in both the ultra-low and high operating positions.

[0089] The outer sleeve structure 121 is provided with a door frame latch hole 1212, and the column 11 is provided with a high position latch hole 112 corresponding to the high position working condition, and an ultra-low position latch hole 113 corresponding to the ultra-low position working condition. The latch 16 is fixed through the door frame latch hole 1212, the high position latch hole 112 or the ultra-low position latch hole 113. Specifically, when the outer sleeve structure 121 is raised and lowered along the column 11 to align the door frame latch hole 1212 with the high position latch hole 112, the latch 16 is fixed through the door frame latch hole 1212 and the high position latch hole 112, and is stabilized in the high position working condition. When the outer sleeve structure 121 is raised and lowered along the column 11 to align the door frame latch hole 1212 with the ultra-low position latch hole 113, the latch 16 is fixed through the door frame latch hole 1212 and the ultra-low position latch hole 113, and is stabilized in the ultra-low position working condition.

[0090] The conversion support device 1 further includes a base 13 and a cylinder seat 17. The bottom end of the column 11 is vertically fixed to the base 13. Side triangle plates 1213 are provided on both sides of the outer sleeve structure 121. The cylinder seat 17 is located on the top surface of the base 13, vertically opposite the side triangle plates 1213. The fixed portion or telescopic portion of the lifting cylinder 15 is partially fixed to the cylinder seat 17, while the other portion is fixed to the side triangle plates 1213. A positioning groove 132 is provided at the bottom of the base 13, which is used to engage the pre-installed positioning boss 105 of the erected box girder 104.

[0091] Ultra-low working condition (see Figure 9 ), the latch 16 is passed through and fixed in the door frame latch hole 1212 and the ultra-low position latch hole 113.

[0092] High working condition (see Figure 10 ), the latch 16 is passed through and fixed in the door frame latch hole 1212 and the high position latch hole 112.

[0093] When the conversion support device 1 moves longitudinally with the vehicle, it includes:

[0094] The bottom surface of the base 13 is suspended relative to the top surface of the erected box beam 104;

[0095] The column 11 is driven downward by the lifting cylinder 15, including:

[0096] The column 11 is driven downward by the lifting cylinder 15 until the bottom surface of the base 13 contacts the top surface of the erected box beam 104 , and the positioning groove 132 of the base 13 engages with the pre-set positioning boss 105 of the erected box beam 104 .

[0097] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0098] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0099] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A conversion support assembly for ultra-low working condition of a bridge crane, characterized in that: The conversion support assembly comprises an even number of conversion support devices (1), and the conversion support device (1) comprises: Two vertically spaced columns (11); A lifting gantry (12) is arranged between the two upright posts (11), wherein the length of the lifting gantry (12) is greater than the width of the beam transport vehicle; A lifting cylinder (15) is fixed to the end of the lifting gantry (12) and drives the lifting gantry (12) to move up and down relative to the column (11); All the conversion support devices (1) are raised and lowered synchronously. The conversion support device (1) is used to place the lifting gantry (12) transversely across the top surface of the beam transport vehicle (102) in an ultra-low position working condition and move longitudinally with the vehicle. It is also used to support the beam piece (101) in an ultra-low position to provide the required beam removal clearance for the bridge crane (100); the conversion support device (1) is used to lift the beam piece (101) and separate it from the beam transport vehicle (102) in a high position working condition.

2. The conversion support assembly for the ultra-low position working condition of a bridge crane according to claim 1, characterized in that: The lifting gantry (12) comprises a connecting beam (122) and an outer sleeve structure (121) arranged at both ends of the connecting beam (122); the outer sleeve structure (121) is sleeved on the column (11) and slides along the column (11) under the action of a lifting oil cylinder (15); the outer sleeve structure (121) is fixed to the column (11) by a latch (16) in the ultra-low position working condition and the high position working condition.

3. The conversion support assembly for the ultra-low position working condition of a bridge crane according to claim 2, characterized in that: The outer sleeve structure (121) is provided with a door frame latch hole (1212), the column (11) is provided with a high position latch hole (112) and an ultra-low position latch hole (113), and the latch (16) is passed through and fixed in the door frame latch hole (1212), the high position latch hole (112) or the ultra-low position latch hole (113).

4. The conversion support assembly for the ultra-low position working condition of a bridge crane according to claim 2, characterized in that: The conversion support device (1) further comprises a base (13) and a cylinder seat (17), wherein the bottom end of the column (11) is vertically fixed to the base (13); side triangular plates (1213) are provided on both sides of the outer sleeve structure (121), and the cylinder seat (17) is provided on the top surface of the base (13) at a vertically opposite position to the side triangular plates (1213); A portion of the fixed portion or the telescopic portion of the lifting oil cylinder (15) is fixed to the oil cylinder seat (17), and the other portion is fixed to the side triangular plate (1213).

5. The conversion support assembly for the ultra-low position working condition of a bridge crane according to claim 4, characterized in that: A seat connecting plate (131) is provided on the top surface of the base (13), a horizontal column connecting plate (114) is fixedly provided at the bottom end of the column (11), and the column connecting plate (114) and the oil cylinder seat (17) are both fixed to the seat connecting plate (131) by bolts.

6. The conversion support assembly for the ultra-low position working condition of a bridge crane according to claim 4, characterized in that: A positioning groove (132) is provided at the bottom of the base (13), and the positioning groove (132) is used for engaging with a positioning boss (105) pre-set on the erected box beam (104).

7. The conversion support assembly for the ultra-low position working condition of a bridge crane according to claim 1, characterized in that: The lifting door frame (12) has a concave groove for accommodating the beam piece (101), and a rubber pad (14) is arranged between the top surface of the concave groove and the beam piece (101).

8. A beam conversion method based on the conversion support assembly of claim 1, characterized in that: The following steps are involved: The conversion support device (1) is in an ultra-low position working condition, the lifting gantry (12) is laterally placed across the top surface of the beam transport vehicle (102) and moves longitudinally with the vehicle, and the beam piece (101) is placed on the beam transport vehicle (102); at this time, the bottom surface of the column (11) is suspended relative to the top surface of the erected box beam (104), the two columns (11) are respectively located on both sides of the transverse bridge of the beam transport vehicle (102), and the bottom surface of the lifting gantry (12) is in close contact with the load-bearing top surface of the beam transport vehicle (102); After reaching the designated position, the lifting gantry (12) remains stationary, and the column (11) is driven by the lifting cylinder (15) to move downward until the bottom surface of the column (11) contacts the top surface of the erected box beam (104). The column (11) remains stationary, and the lifting gantry (12) lifts the beam piece (101) upward to a high working condition, and the beam piece (101) is separated from the beam transport vehicle (102); The beam transport vehicle (102) moves away, and the lifting gantry (12) is lowered to an ultra-low position under the action of the lifting oil cylinder (15).

9. The beam conversion method according to claim 8, characterized in that: When the lifting gantry (12) is laterally placed across the top surface of the beam transport vehicle (102) and moves longitudinally with the vehicle, it comprises: The conversion support device (1) and the beam transport vehicle (102) are rigidly connected by a connecting rod; When the lifting gantry (12) lifts the beam piece (101) upward to a high position working state, it includes: The connecting rod is disassembled, and the conversion support device (1) and the beam transport vehicle (102) are separated.

10. The beam conversion method according to claim 8, wherein: The lifting gantry (12) comprises a connecting beam (122) and an outer sleeve structure (121) arranged at both ends of the connecting beam (122), the outer sleeve structure (121) being sleeved on the column (11) and sliding along the column (11) under the action of the lifting oil cylinder (15); the conversion support device (1) further comprises a base (13), the bottom end of the column (11) being vertically fixed to the base (13); the outer sleeve structure (121) is provided with a gantry pin hole (1212), the column (11) is provided with a high-position pin hole (112) and an ultra-low-position pin hole (113); the bottom of the base (13) is provided with a positioning groove (132); In the ultra-low position working condition, the latch (16) is passed through and fixed in the door frame latch hole (1212) and the ultra-low position latch hole (113); In the high-position working condition, the latch (16) is fixed through the door frame latch hole (1212) and the high-position latch hole (112); When the conversion support device (1) moves longitudinally with the vehicle, it comprises: The bottom surface of the base (13) is suspended relative to the top surface of the erected box beam (104); The column (11) is driven by the lifting cylinder (15) to move downward until the bottom surface of the column (11) contacts the top surface of the erected box beam (104), comprising: It moves downward until the bottom surface of the base (13) contacts the top surface of the erected box beam (104), and the positioning groove (132) of the base (13) engages with the pre-set positioning boss (105) of the erected box beam (104).

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