Multi-mode rapid switching prefabricated box girder / pier column hoisting system and hoisting method

Abstract

The invention provides a multi-mode quick-switching prefabricated box girder / pier column hoisting system which is used in a girder carrying machine and consists of a double-machine linkage lifting appliance for hoisting a 60m or 70m box girder, a prefabricated pier column lifting appliance for hoisting different sections of a prefabricated pier column and a single-machine lifting appliance for hoisting a 40m or below box girder. The invention further provides a hoisting method. The hoisting method comprises the following three modes: a double-machine linkage hoisting mode, a prefabricated pier column hoisting mode and a single-machine hoisting mode. On the basis of double-machine linkage of an existing beam carrying machine, carrying and hoisting of 60m and 70m box girders can be achieved jointly, meanwhile, hoisting and carrying of 40m and 32m box girders can be achieved, hoisting of different sections in prefabricated pier columns can be achieved, the multiple purposes of one machine are truly achieved, the cost is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention provides a hoisting system and a hoisting method which can hoist a prefabricated box girder / pier and can quickly switch between different hoisting modes, belonging to the technical field of bridge hoisting equipment. Background Art

[0002] At present, my country's high-speed railway is developing rapidly, among which the construction of large-span bridges is the future development trend. At present, the span of more and more high-speed railway lines has changed from the original 32m to 40m, and new high-speed railway construction equipment is needed to meet the use needs. Among them, the on-site transportation and construction of prefabricated box beams is an important part of the high-speed railway construction. The use of tire-type beam movers has become the main means in this construction process.

[0003] At present, there are special beam movers for 40m box girders that can meet their beam moving requirements, and are also compatible with the handling of 32m box girders. However, for the handling of 60m and 70m box girders, they can only be handled by larger beam movers. The existing beam movers suitable for 40m box girders cannot meet their handling requirements. However, the use of larger beam movers will undoubtedly lead to a sharp increase in costs.

[0004] In addition to prefabricated box girders, bridge piers can also be prefabricated. Fully prefabricated bridge structures have the advantages of accelerating construction speed, reducing on-site pollution, and achieving low-carbon construction. With the further development of bridge construction, the modern industrialization technology of bridges has gradually matured. Among them, the hoisting of prefabricated bridge piers is one of the important links in the construction of prefabricated bridges, but the hoisting point positions of piers with different cross-sections are different, and steel wire ropes of different lengths and specifications need to be selected for hoisting. The existing hangers for hoisting bridge piers have a fixed spacing of the hangers, and the position of the hoisting points cannot be adjusted, which is not suitable for the hoisting of prefabricated bridge piers with different cross-sections.

[0005] Therefore, there is an urgent need in the art to provide a hoisting system that is compatible with the hoisting of all the above prefabricated box girders and prefabricated piers, and at the same time is required to be able to quickly switch between different hoisting modes. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a multi-mode fast-switching prefabricated box girder / pier hoisting system, which can realize the transportation and hoisting of 60m and 70m box girders based on the linkage of two existing beam moving machines, and can also meet the hoisting and transportation of 40m and 32m box girders, and can also take into account the hoisting of different sections in the prefabricated piers, truly realizing multiple uses of one machine, reducing costs and improving construction efficiency.

[0007] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0008] A multi-mode fast-switching prefabricated box beam / pier hoisting system, used in beam moving machines, consists of a double-machine linkage lifting and hoisting sling, a prefabricated pier hoist and a single-machine hoisting sling. The double-machine linkage lifting and hoisting sling is used for hoisting 60m or 70m box beams, the prefabricated pier hoist is used for hoisting different sections of prefabricated piers, and the single-machine hoisting sling is used for hoisting box beams of 40m and below.

[0009] There are two sets of double-machine linkage lifting and hoisting slings, which are respectively installed in two beam moving machines, and the two sets of double-machine linkage lifting and hoisting slings are respectively arranged at the front end and the rear end of the box beam to lift the box beam together; the double-machine linkage lifting and hoisting slings include:

[0010] The lifting beam comprises two left and right longitudinal beams and a cross beam connected between the two longitudinal beams. The ends of the two longitudinal beams are provided with lifting ears, which are connected to the movable pulley block of the lifting trolley through a pin shaft, and the two movable pulley blocks on a single lifting trolley are connected to the two lifting ears of the same longitudinal beam. The middle parts of the two longitudinal beams are provided with a first U-shaped connecting groove facing outward in the horizontal direction, and a slot hole penetrating from top to bottom and opening outward is provided in the first U-shaped connecting groove;

[0011] The lower supporting beam is composed of a cross beam, and the left and right ends of the cross beam are provided with second U-shaped connecting grooves facing outwards in the horizontal direction, and the second U-shaped connecting groove is provided with a slot hole that passes through from top to bottom and opens outwards, and the second U-shaped connecting groove corresponds to the first U-shaped connecting groove in the upper and lower positions;

[0012] Two slings are provided, including ropes and limit heads fixed at both ends of the ropes, and the two ends of the slings are respectively clamped in the first U-shaped connecting groove and the second U-shaped connecting groove, and are limited by the limit heads;

[0013] The prefabricated pier column hanger comprises:

[0014] The shoulder pole beam comprises two left and right longitudinal beams and two cross beams connected between the two longitudinal beams. The two cross beams are welded and fixed to the two longitudinal beams. The ends of the two longitudinal beams are provided with lifting ears, which are connected to the movable pulley block of the lifting trolley through a pin shaft, and the two movable pulley blocks on a single lifting trolley are connected to the two lifting ears of the same longitudinal beam; the two cross beams are provided with two horizontal waist holes that penetrate up and down, and the positions of the four horizontal waist holes correspond to each other;

[0015] Four first suspension rods are provided, and the four first suspension rods pass through four transverse waist holes respectively, and the top ends of the first suspension rods are installed above the transverse waist holes through nuts, and the positions of the first suspension rods on the transverse waist holes are transversely adjustable;

[0016] There are two lower adjustment beams, which are arranged longitudinally. Both ends of the lower adjustment beams are provided with lifting holes. The first suspension rod passes through the lifting hole, and the bottom end of the first suspension rod is installed below the lifting hole through a nut. Each lower adjustment beam is connected to two first suspension rods. Two longitudinal waist holes that penetrate up and down are provided on the two lower adjustment beams, and the positions of the four longitudinal waist holes correspond to each other.

[0017] Four second hangers are provided, the four second hangers respectively pass through four longitudinal waist holes, and the top ends of the second hangers are installed above the longitudinal waist holes through nuts, and the positions of the second hangers on the longitudinal waist holes are longitudinally adjustable; the bottom ends of the second hangers are connected to the prefabricated pier column segments;

[0018] The single-machine lifting slings are provided with two sets, which are respectively connected to the two lifting overhead cranes in the beam moving machine, and the two sets of single-machine lifting slings are respectively located at the front end and the rear end of the box beam to jointly lift the box beam.

[0019] Furthermore, two cross beams are provided in the lifting beam, and the two cross beams are welded and fixed to the two longitudinal beams.

[0020] Furthermore, a gasket is arranged on the top surface of the lower supporting beam, and the box beam is placed on the gasket of the lower supporting beam.

[0021] Furthermore, the widths of the lifting beam and the lower supporting beam are both smaller than the width of the top surface of the box beam, and larger than the width of the bottom surface of the box beam, and the sling as a whole can pass through the reserved hole on the box beam.

[0022] Furthermore, the two cross beams in the shoulder pole beam are connected between the ends of the two longitudinal beams, and the shoulder pole beam as a whole is a rectangular frame structure.

[0023] Furthermore, the single-machine lifting sling includes a lifting beam and four third lifting rods. The lifting beam is longitudinally arranged, and lifting ears connected to the movable pulley set are arranged at the head and tail ends of the top of the lifting beam. Lifting holes are arranged at the four corners of the lifting beam. The third lifting rod passes through the four lifting holes respectively, and the top end of the third lifting rod is installed above the lifting hole through a nut, and the bottom end of the third lifting rod is connected to the box beam.

[0024] The present invention also provides a multi-mode fast-switching prefabricated box girder / pier hoisting method, the hoisting method includes the following three modes: a double-machine linkage lifting mode, a prefabricated pier hoisting mode and a single-machine lifting mode, and the hoisting equipment to be used is determined according to the specifications of the prefabricated box girder and the prefabricated pier segment to be hoisted, wherein the double-machine linkage lifting hoisting equipment is used for the hoisting of 60m or 70m box girders, the prefabricated pier hoisting equipment is used for the hoisting of different segments of prefabricated piers, and the single-machine hoisting hoisting equipment is used for the hoisting of box girders of 40m and below; when switching between different modes, the hoisting equipment corresponding to the front mode is directly removed from the movable pulley block, and then the crane is moved to make its position correspond to the hoisting equipment in the rear mode, and then the hoisting equipment corresponding to the rear mode is installed on the movable pulley block.

[0025] Furthermore, the dual-machine linkage lifting mode includes the following steps: (1) moving the two crane cranes in the beam moving machine inward so that the distance between them matches the width of the lifting beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the lifting beam through a pin shaft;

[0026] (2) Lift the lifting beam to a certain height to lift it off the ground, then insert the head end of the sling into the slot in the first U-shaped connecting groove on the lifting beam, so that the limit head at the head end of the sling is stuck above the first U-shaped connecting groove, and then the crane continues to lift the lifting beam and the sling together to a height exceeding the top surface of the box beam;

[0027] (3) Move the two beam movers to the front and rear ends of the box beam respectively, and adjust the angle and position of the beam movers to make them perpendicular to the box beam, and make the slings be located directly above the reserved holes on the flange of the box beam;

[0028] (4) The crane crane is lowered, causing the lifting beam and the sling to descend synchronously. The sling passes downward through the reserved hole on the flange until the tail end of the sling is lower than the bottom surface of the box beam.

[0029] (5) Place the lower joist below the front and rear ends of the box beam (since the box beam is placed on the base, the ends of the box beam are at a certain height from the ground), and then insert the tail end of the sling into the slot hole in the second U-shaped connecting groove on the lower joist so that the limit head at the tail end of the sling is stuck below the second U-shaped connecting groove;

[0030] (6) The cranes in the two beam moving machines are lifted synchronously to lift the box beam and make it leave the base. Then, the cranes are moved synchronously to move the box beam and complete the operation of a single box beam.

[0031] (7) After the box beam is moved, the limit head at the tail end of the sling is pulled out from the second U-shaped connection groove, the lower support beam is removed, and the crane continues to lift the sling to completely pull the sling out of the box beam. At this time, repeat steps (3) to (6) to move the next box beam.

[0032] (8) After all the box girders have been moved, or when it is necessary to switch to another mode, follow the reverse steps (1)-(2) to remove the slings and lift the girders.

[0033] Furthermore, the prefabricated pier column hoisting mode includes the following steps: (1) moving two overhead cranes in the beam moving machine inward so that the distance between the two cranes matches the width of the shoulder beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the shoulder beam through a pin shaft;

[0034] (2) lifting the shoulder pole beam to a certain height to make it off the ground, then passing the head ends of the four first suspension rods through the four transverse waist holes on the shoulder pole beam, and then connecting them with nuts and washers, and then installing the two lower adjustment beams at the tail ends of the four first suspension rods respectively;

[0035] (3) The crane continues to lift the lower adjustment beam to a certain height to make it off the ground, and then passes the head ends of the four second suspension rods through the four longitudinal waist holes on the lower adjustment beam, and then connects them with nuts and washers;

[0036] (4) According to the positions of the four lifting holes on the segment to be transported, adjust the lateral and longitudinal positions of the first suspension rod and the second suspension rod on the sling so that the positions of the four second suspension rods correspond to the positions of the four lifting holes; the crane continues to lift so that the tail height of the second suspension rod exceeds the top height of the segment;

[0037] (5) The beam moving machine is moved as a whole to the segment to be moved, and then the position is adjusted so that the four second suspension rods are located directly above the lifting holes on the segment. The crane then lowers the sling so that the tail of the second suspension rod is deeply inserted into the lifting hole.

[0038] (6) The staff enters the interior of the segment and installs the gasket and nut at the tail end of the second boom;

[0039] (7) The crane in the beam moving machine is lifted to lift the segment of the prefabricated pier column, so that the segment is off the ground, and then the segment is moved by the synchronous movement of the crane to complete the operation of a single segment beam;

[0040] (8) After the segment is transported, remove the nut at the tail end of the second suspension rod, and then lift the crane to completely pull the second suspension rod out of the segment. Then repeat steps (4) to (7) to carry out the transport operation of the next prefabricated pier segment.

[0041] (9) After all the prefabricated pier column segments have been transported, or when it is necessary to switch to another mode, the second suspension rod, the lower adjustment beam, the first suspension rod and the shoulder beam can be removed in sequence according to the reverse steps (1) to (3).

[0042] Furthermore, the single-machine lifting mode includes the following steps: (1) moving two overhead cranes in the beam moving machine outward so that the distance between them matches the length of the box beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the lifting beam through a pin shaft; the movable pulley blocks in the two overhead cranes are respectively connected to the two lifting beams;

[0043] (2) Lift the hoisting beam to a certain height to lift it off the ground, then pass the head ends of the four third suspension rods through the four hoisting holes on the hoisting beam and connect them with nuts and washers;

[0044] (3) The crane continues to lift until the tail of the third boom is higher than the top of the box girder;

[0045] (4) The beam moving machine is moved as a whole to the box beam to be moved, and then the position is adjusted so that the four third suspension rods in one suspension device are located directly above the lifting hole at one end of the box beam, and the four third suspension rods in another suspension device are located directly above the lifting hole at the other end of the box beam, and then the crane lowers the suspension device so that the tail of the third suspension rod is deeply inserted into the lifting hole;

[0046] (5) The staff enters the box girder and installs the gasket and nut at the tail end of the third hanger rod;

[0047] (6) The crane in the beam moving machine is lifted to lift the box beam, so that the box beam is off the ground, and then the box beam is moved by the synchronous movement of the crane to complete the operation of a single box beam;

[0048] (7) After the box beam is moved, remove the nut at the end of the third suspension rod, and then lift the crane to completely pull the third suspension rod out of the box beam. Then repeat steps (3) to (6) to move the next box beam.

[0049] (8) After all the box girders have been moved, or when it is necessary to switch to other modes, follow the reverse steps of steps (1)-(2) to remove the third suspension rod and the lifting beam in sequence.

[0050] Compared with the prior art, the multi-mode fast-switching prefabricated box beam / pier column hoisting system and hoisting method provided by the present invention have the following advantages: 1. The present invention can make the existing beam moving machine double-machine linkage jointly realize the handling and hoisting of 60m and 70m box beams, and at the same time can meet the hoisting and handling of 40m and 32m box beams, and can also meet the hoisting of different sections of prefabricated pier columns, one machine for multiple uses, reducing costs. 2. In the present invention, when it is necessary to switch the hoisting mode, the switching method is simple, fast and flexible, and the construction efficiency is improved. 3. The double-machine linkage lifting and hoisting sling provided by the present invention, during hoisting, because the limit heads are set at both ends of the rope, the limit heads cooperate with the U-shaped connecting grooves on the lifting beam and the lower supporting beam, and the installation of the hoisting sling can be realized very conveniently and quickly, avoiding the need to adopt the nut tightening method in the existing hoisting mode, saving time and effort. 4. The present invention adopts double-machine linkage lifting and hoisting, which can be used for lifting box beams of different lengths, and no special hoisting holes are required on the box beam, and the hoisting and beam moving methods are flexible. 5. The sling provided by the present invention is suitable for hoisting different sections of prefabricated piers. The position of the sling rod in the sling can change with the change of the hoisting holes on the different sections. The hoisting operation of different sections of prefabricated piers can be realized based on a set of slings. One set can be used for multiple purposes, which reduces costs and improves construction efficiency. 6. The sling provided by the present invention is suitable for hoisting different sections of prefabricated piers. The sling rod can be directly connected to the reserved hole (prestressed hole) on the prefabricated pier section to hoist the section. There is no need to install additional lifting ears on the section, so the construction process is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the overall structure of the double-machine linkage lifting and hoisting device in the present invention;

[0052] Figure 2 for Figure 1 Side view of

[0053] Figure 3 This is a top view of the lifting beam;

[0054] Figure 4 This is the main view of the lifting beam;

[0055] Figure 5 It is a side view of the lifting beam;

[0056] Figure 6 This is a top view of the lower joist;

[0057] Figure 7 This is the main view of the lower joist;

[0058] Figure 8 It is the side view of the lower joist;

[0059] Fig. 9 This is a schematic diagram of the use status of the dual-machine linkage lifting mode in the present invention;

[0060] Fig.10 for Fig. 9 Side view of

[0061] Fig.11 It is a schematic diagram of the overall structure of the prefabricated pier column hanger in the present invention;

[0062] Fig.12 for Fig.11 Side view of

[0063] Fig.13 for Fig.11 A top view of

[0064] Fig.14 It is a schematic diagram of the use state of the prefabricated pier column hoisting mode in the present invention;

[0065] Fig.15 for Fig.14 Side view of

[0066] Fig.16 It is a schematic diagram of the overall structure of a single-machine lifting sling in the present invention;

[0067] Fig.17 for Fig.16 Side view of

[0068] Fig.18 It is a schematic diagram of the use state of the single-machine lifting sling in the present invention;

[0069] Fig.19 for Fig.18 Side view of

[0070] In the figure: 1-beam moving machine, 2-lifting crane, 3-movable pulley block, 4-box beam, 5-lifting ear, 6-prefabricated pier, 101-lifting beam, 102-first U-shaped connecting groove, 103-lower supporting beam, 104-second U-shaped connecting groove, 105-sling, 106-limiting head, 107-gasket, 201-shoulder beam, 202-transverse waist hole, 203-first suspension rod, 204-lower adjusting beam, 205-longitudinal waist hole, 206-second suspension rod, 301-lifting beam, 302-third suspension rod. DETAILED DESCRIPTION

[0071] The present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following embodiments.

[0072] The multi-mode fast-switching prefabricated box girder / pier hoisting system provided by the present invention is used in a beam moving machine and consists of a double-machine linkage lifting sling, a prefabricated pier hoist and a single-machine lifting sling. The double-machine linkage lifting sling is used for lifting 60m or 70m box girders, the prefabricated pier hoist is used for lifting different sections of prefabricated piers, and the single-machine lifting sling is used for lifting box girders of 40m and below.

[0073] The double-machine linkage lifting and hoisting device has a structure as follows: Figure 1-Figure 10 As shown, two sets of lifting devices are provided, which are respectively installed in two beam moving machines 1, and the two sets of lifting devices are respectively arranged at the front end and the rear end of the box beam 4 to lift the box beam 4 together, as shown in FIG. Fig.10 shown.

[0074] The lifting beam 101 structure in the sling is shown in FIG. Figure 3-Figure 5 , including two left and right longitudinal beams and a cross beam connected between the two longitudinal beams, the lifting beam is provided with two cross beams, and the two cross beams are welded and fixed to the two longitudinal beams. The ends of the two longitudinal beams are provided with lifting ears 5, the lifting ears are connected to the movable pulley block 3 of the lifting trolley 2 through a pin shaft, and the two movable pulley blocks 3 on a single lifting trolley 2 are connected to the two lifting ears 5 of the same longitudinal beam, and the middle parts of the two longitudinal beams are provided with a first U-shaped connecting groove 102 facing outward in the horizontal direction, and a slot hole that penetrates up and down and opens outward is provided in the first U-shaped connecting groove 102.

[0075] The structure of the lower support beam 103 is as follows: Figure 6-Figure 8 As shown, it is composed of a crossbeam, and the left and right ends of the crossbeam are provided with a second U-shaped connecting groove 104 facing outward in the horizontal direction. The second U-shaped connecting groove 104 is provided with a slot hole that passes through from top to bottom and opens outward, and the second U-shaped connecting groove 104 corresponds to the position of the first U-shaped connecting groove 102 in upper and lower directions; a gasket 107 is provided on the top surface of the lower supporting beam 103, and the box beam 4 is placed on the gasket 107 of the lower supporting beam 103.

[0076] The structure of the sling 105 is as follows Figure 1 and Figure 2 As shown, two are provided, and two sets of slings are provided with four in total. The sling includes a rope and a limit head 105 fixed at both ends of the rope, and the ends of the sling are respectively stuck in the first U-shaped connecting groove 102 and the second U-shaped connecting groove 104, and are limited by the limit head 106. The width of the lifting beam 101 and the lower supporting beam 103 are both smaller than the width of the top surface of the box beam 4, and larger than the width of the bottom surface of the box beam, and the sling 105 as a whole can pass through the reserved hole on the flange of the box beam.

[0077] The prefabricated pier column hanger provided by the present invention has a structure as follows Figure 11-Figure 15As shown, the shoulder pole beam 201 in the sling includes two left and right longitudinal beams and two cross beams connected between the two longitudinal beams, and the two cross beams are welded and fixed to the two longitudinal beams; the two cross beams in the shoulder pole beam are connected between the ends of the two longitudinal beams, and the shoulder pole beam as a whole is a rectangular frame structure. The ends of the two longitudinal beams are provided with lifting ears 5, which are connected to the movable pulley block of the lifting trolley 2 on the top of the beam moving machine 1 through a pin shaft, and the two movable pulley blocks on a single lifting trolley 2 are connected to the two lifting ears 5 of the same longitudinal beam; the two cross beams are provided with two horizontal waist holes 202 that penetrate up and down, and the positions of the four horizontal waist holes 202 correspond to each other.

[0078] Four first suspension rods 203 are provided, and the four first suspension rods pass through four transverse waist holes 202 respectively, and the top ends of the first suspension rods 203 are installed above the transverse waist holes 202 through nuts, and the positions of the first suspension rods 203 on the transverse waist holes 202 are laterally adjustable; the four first suspension rods have the same length, and the top ends of the four first suspension rods are distributed in a rectangular shape in the horizontal plane.

[0079] There are two lower adjusting beams 204 in total. The lower adjusting beams 204 are arranged longitudinally. Lifting holes are respectively arranged at both ends of the lower adjusting beams. The first hanging rod passes through the lifting hole, and the bottom end of the first hanging rod is installed below the lifting hole through a nut. Each lower adjusting beam is connected to two first hanging rods; two lower adjusting beams are each provided with two longitudinal waist holes 205 that pass through from top to bottom, and the positions of the four longitudinal waist holes 205 correspond to each other.

[0080] Four second suspension rods 206 are provided, and the four second suspension rods 206 pass through the four longitudinal waist holes 205 respectively, and the top ends of the second suspension rods 206 are installed above the longitudinal waist holes 205 through nuts, and the positions of the second suspension rods on the longitudinal waist holes are longitudinally adjustable; the bottom ends of the second suspension rods are connected to the prefabricated pier column segments. The four second suspension rods have the same length, and the top ends of the four second suspension rods are distributed in a rectangular shape in the horizontal plane.

[0081] The structure of the stand-alone lifting sling provided by the present invention is as follows: Figure 16-Figure 19 As shown, the single-machine lifting sling includes a lifting beam 301 and four third suspension rods 302. The lifting beam 301 is longitudinally arranged, and the head and tail ends of the top thereof are provided with lifting ears 5 connected to the movable pulley set. The four corners of the lifting beam 301 are provided with lifting holes, and the third suspension rods 302 pass through the four lifting holes respectively, and the top end of the third suspension rod is installed above the lifting hole through a nut, and the bottom end of the third suspension rod is connected to the box beam 4.

[0082] The present invention provides a multi-mode fast-switching prefabricated box girder / pier hoisting method, which includes the following three modes: a double-machine linkage lifting mode, a prefabricated pier hoisting mode and a single-machine lifting mode. The lifting equipment to be used is determined according to the specifications of the prefabricated box girder and the prefabricated pier segment to be lifted. The double-machine linkage lifting lifting equipment is used for lifting 60m or 70m box girders, the prefabricated pier hoist is used for lifting different segments of prefabricated piers, and the single-machine lifting lifting equipment is used for lifting box girders of 40m and below. When switching between different modes, the lifting equipment corresponding to the front mode is directly removed from the movable pulley block, and then the crane is moved to make its position correspond to the lifting equipment in the rear mode, and then the lifting equipment corresponding to the rear mode is installed on the movable pulley block.

[0083] Reference Fig. 9 and Fig.10 The dual-machine linkage lifting mode includes the following steps:

[0084] (1) Move the two crane cranes in the beam moving machine inward so that the distance between them matches the width of the lifting beam, then lower the movable pulley block to the ground and connect the movable pulley block to the lifting lug of the lifting beam through the pin shaft;

[0085] (2) Lift the lifting beam to a certain height to lift it off the ground, then insert the head end of the sling into the slot in the first U-shaped connecting groove on the lifting beam, so that the limit head at the head end of the sling is stuck above the first U-shaped connecting groove, and then the crane continues to lift the lifting beam and the sling together to a height exceeding the top surface of the box beam;

[0086] (3) Move the two beam movers to the front and rear ends of the box beam respectively, and adjust the angle and position of the beam movers to make them perpendicular to the box beam, and make the slings be located directly above the reserved holes on the flange of the box beam;

[0087] (4) The crane crane is lowered, causing the lifting beam and the sling to descend synchronously. The sling passes downward through the reserved hole on the flange until the tail end of the sling is lower than the bottom surface of the box beam.

[0088] (5) Place the lower joist below the front and rear ends of the box beam (since the box beam is placed on the base, the ends of the box beam are at a certain height from the ground), and then insert the tail end of the sling into the slot hole in the second U-shaped connecting groove on the lower joist so that the limit head at the tail end of the sling is stuck below the second U-shaped connecting groove;

[0089] (6) The cranes in the two beam moving machines are lifted synchronously to lift the box beam and make it leave the base. Then, the cranes are moved synchronously to move the box beam and complete the operation of a single box beam.

[0090] (7) After the box beam is moved, the limit head at the tail end of the sling is pulled out from the second U-shaped connection groove, the lower support beam is removed, and the crane continues to lift the sling to completely pull the sling out of the box beam. At this time, repeat steps (3) to (6) to move the next box beam.

[0091] (8) After all the box girders have been moved, or when it is necessary to switch to another mode, follow the reverse steps (1)-(2) to remove the slings and lift the girders.

[0092] Reference Fig.14 and Fig.15 , the prefabricated pier column hoisting mode includes the following steps:

[0093] (1) Move the two cranes in the beam moving machine inward so that the distance between them matches the width of the pole beam, then lower the movable pulley block to the ground and connect the movable pulley block to the lifting lug of the pole beam through the pin shaft;

[0094] (2) lifting the shoulder pole beam to a certain height to make it off the ground, then passing the head ends of the four first suspension rods through the four transverse waist holes on the shoulder pole beam, and then connecting them with nuts and washers, and then installing the two lower adjustment beams at the tail ends of the four first suspension rods respectively;

[0095] (3) The crane continues to lift the lower adjustment beam to a certain height to make it off the ground, and then passes the head ends of the four second suspension rods through the four longitudinal waist holes on the lower adjustment beam, and then connects them with nuts and washers;

[0096] (4) According to the positions of the four lifting holes on the segment to be transported, adjust the lateral and longitudinal positions of the first suspension rod and the second suspension rod on the sling so that the positions of the four second suspension rods correspond to the positions of the four lifting holes; the crane continues to lift so that the tail height of the second suspension rod exceeds the top height of the segment;

[0097] (5) The beam moving machine is moved as a whole to the segment to be moved, and then the position is adjusted so that the four second suspension rods are located directly above the lifting holes on the segment. The crane then lowers the sling so that the tail of the second suspension rod is deeply inserted into the lifting hole.

[0098] (6) The staff enters the interior of the segment and installs the gasket and nut at the tail end of the second boom;

[0099] (7) The crane in the beam moving machine is lifted to lift the segment of the prefabricated pier column, so that the segment is off the ground, and then the segment is moved by the synchronous movement of the crane to complete the operation of a single segment beam;

[0100] (8) After the segment is transported, remove the nut at the tail end of the second suspension rod, and then lift the crane to completely pull the second suspension rod out of the segment. Then repeat steps (4) to (7) to carry out the transport operation of the next prefabricated pier segment.

[0101] (9) After all the prefabricated pier column segments have been transported, or when it is necessary to switch to another mode, the second suspension rod, the lower adjustment beam, the first suspension rod and the shoulder beam can be removed in sequence according to the reverse steps (1) to (3).

[0102] Reference Fig.18 and Fig.19 The single-machine lifting mode includes the following steps: (1) moving the two cranes in the beam moving machine outward so that the distance between them matches the length of the box beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the lifting beam through a pin shaft; the movable pulley blocks in the two cranes are respectively connected to the two lifting beams;

[0103] (2) Lift the hoisting beam to a certain height to lift it off the ground, then pass the head ends of the four third suspension rods through the four hoisting holes on the hoisting beam and connect them with nuts and washers;

[0104] (3) The crane continues to lift until the tail of the third boom is higher than the top of the box girder;

[0105] (4) The beam moving machine is moved as a whole to the box beam to be moved, and then the position is adjusted so that the four third suspension rods in one suspension device are located directly above the lifting hole at one end of the box beam, and the four third suspension rods in another suspension device are located directly above the lifting hole at the other end of the box beam, and then the crane lowers the suspension device so that the tail of the third suspension rod is deeply inserted into the lifting hole;

[0106] (5) The staff enters the box girder and installs the gasket and nut at the tail end of the third hanger rod;

[0107] (6) The crane in the beam moving machine is lifted to lift the box beam, so that the box beam is off the ground, and then the box beam is moved by the synchronous movement of the crane to complete the operation of a single box beam;

[0108] (7) After the box beam is moved, remove the nut at the end of the third suspension rod, and then lift the crane to completely pull the third suspension rod out of the box beam. Then repeat steps (3) to (6) to move the next box beam.

[0109] (8) After all the box girders have been moved, or when it is necessary to switch to other modes, follow the reverse steps of steps (1)-(2) to remove the third suspension rod and the lifting beam in sequence.

Claims

1. A multi-mode fast-switching prefabricated box beam / pier hoisting system, used in a beam moving machine, is composed of a double-machine linkage lifting sling, a prefabricated pier hoist and a single-machine hoisting sling, wherein the double-machine linkage lifting sling is used for the hoisting of 60m or 70m box beams, the prefabricated pier hoist is used for the hoisting of different sections of prefabricated piers, and the single-machine hoisting sling is used for the hoisting of box beams of 40m and below, characterized in that: There are two sets of double-machine linkage lifting and hoisting slings, which are installed in two beam movers respectively, and the two sets of double-machine linkage lifting and hoisting slings are respectively arranged at the front end and the rear end of the box beam to lift the box beam together; The double-machine linkage lifting and hoisting device comprises: The lifting beam comprises two left and right longitudinal beams and a cross beam connected between the two longitudinal beams. The ends of the two longitudinal beams are provided with lifting ears, which are connected to the movable pulley block of the lifting trolley through a pin shaft, and the two movable pulley blocks on a single lifting trolley are connected to the two lifting ears of the same longitudinal beam. The middle parts of the two longitudinal beams are provided with a first U-shaped connecting groove facing outward in the horizontal direction, and a slot hole penetrating from top to bottom and opening outward is provided in the first U-shaped connecting groove; The lower supporting beam is composed of a cross beam, and the left and right ends of the cross beam are provided with second U-shaped connecting grooves facing outwards in the horizontal direction, and the second U-shaped connecting groove is provided with a slot hole that passes through from top to bottom and opens outwards, and the second U-shaped connecting groove corresponds to the first U-shaped connecting groove in the upper and lower positions; Two slings are provided, including ropes and limit heads fixed at both ends of the ropes, and the two ends of the slings are respectively clamped in the first U-shaped connecting groove and the second U-shaped connecting groove, and are limited by the limit heads; The prefabricated pier column hanger comprises: The shoulder pole beam comprises two left and right longitudinal beams and two cross beams connected between the two longitudinal beams. The two cross beams are welded and fixed to the two longitudinal beams. The ends of the two longitudinal beams are provided with lifting ears, which are connected to the movable pulley block of the lifting trolley through a pin shaft, and the two movable pulley blocks on a single lifting trolley are connected to the two lifting ears of the same longitudinal beam; the two cross beams are provided with two horizontal waist holes that penetrate up and down, and the positions of the four horizontal waist holes correspond to each other; Four first suspension rods are provided, and the four first suspension rods pass through four transverse waist holes respectively, and the top ends of the first suspension rods are installed above the transverse waist holes through nuts, and the positions of the first suspension rods on the transverse waist holes are transversely adjustable; There are two lower adjustment beams, which are arranged longitudinally. Both ends of the lower adjustment beams are provided with lifting holes. The first suspension rod passes through the lifting hole, and the bottom end of the first suspension rod is installed below the lifting hole through a nut. Each lower adjustment beam is connected to two first suspension rods. Two longitudinal waist holes that penetrate up and down are provided on the two lower adjustment beams, and the positions of the four longitudinal waist holes correspond to each other. Four second hangers are provided, the four second hangers respectively pass through four longitudinal waist holes, and the top ends of the second hangers are installed above the longitudinal waist holes through nuts, and the positions of the second hangers on the longitudinal waist holes are longitudinally adjustable; the bottom ends of the second hangers are connected to the prefabricated pier column segments; The single-machine lifting slings are provided with two sets, which are respectively connected to the two lifting overhead cranes in the beam moving machine, and the two sets of single-machine lifting slings are respectively located at the front end and the rear end of the box beam to jointly lift the box beam.

2. The multi-mode fast-switching prefabricated box beam / pier column hoisting system according to claim 1 is characterized in that: There are two cross beams in the lifting beam, and the two cross beams are welded and fixed to the two longitudinal beams.

3. The multi-mode fast-switching prefabricated box beam / pier column hoisting system according to claim 1 is characterized in that: A gasket is arranged on the top surface of the lower joist, and the box beam is placed on the gasket of the lower joist.

4. The multi-mode fast-switching prefabricated box beam / pier column hoisting system according to claim 1 is characterized in that: The widths of the lifting beam and the lower supporting beam are both smaller than the width of the top surface of the box beam, and larger than the width of the bottom surface of the box beam, and the sling as a whole can pass through the reserved hole on the box beam.

5. The multi-mode fast-switching prefabricated box beam / pier column hoisting system according to claim 1 is characterized in that: The two cross beams in the shoulder-pole beam are connected between the ends of the two longitudinal beams, and the shoulder-pole beam as a whole is a rectangular frame structure.

6. The multi-mode fast-switching prefabricated box beam / pier column hoisting system according to claim 1 is characterized in that: The single-machine lifting sling includes a lifting beam and four third hanging rods. The lifting beam is longitudinally arranged, and the head and tail ends of the top are provided with lifting ears connected to the movable pulley set. The four corners of the lifting beam are provided with lifting holes. The third hanging rod passes through the four lifting holes respectively, and the top end of the third hanging rod is installed above the lifting hole through a nut, and the bottom end of the third hanging rod is connected to the box beam.

7. A hoisting method for the prefabricated box beam / pier column hoisting system based on the multi-mode fast switching system of claim 1, characterized in that: The hoisting method includes the following three modes: a double-machine linkage lifting mode, a prefabricated pier lifting mode and a single-machine lifting mode. The lifting equipment to be used is determined according to the specifications of the prefabricated box beams and the prefabricated pier segments to be lifted. The double-machine linkage lifting equipment is used for the lifting of 60m or 70m box beams, the prefabricated pier lifting equipment is used for the lifting of different segments of prefabricated piers, and the single-machine lifting equipment is used for the lifting of box beams of 40m and below. When switching between different modes, the lifting equipment corresponding to the front mode is directly removed from the movable pulley block, and then the crane is moved to make its position correspond to the lifting equipment in the rear mode, and then the lifting equipment corresponding to the rear mode is installed on the movable pulley block.

8. The hoisting method according to claim 7, characterized in that: The dual-machine linkage lifting mode includes the following steps: (1) moving the two crane cranes in the beam moving machine inward so that the distance between them matches the width of the lifting beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the lifting beam through a pin shaft; (2) Lift the lifting beam to a certain height to lift it off the ground, then insert the head end of the sling into the slot in the first U-shaped connecting groove on the lifting beam, so that the limit head at the head end of the sling is stuck above the first U-shaped connecting groove, and then the crane continues to lift the lifting beam and the sling together to a height exceeding the top surface of the box beam; (3) Move the two beam movers to the front and rear ends of the box beam respectively, and adjust the angle and position of the beam movers to make them perpendicular to the box beam, and make the slings be located directly above the reserved holes on the flange of the box beam; (4) The crane crane is lowered, causing the lifting beam and the sling to descend synchronously. The sling passes downward through the reserved hole on the flange until the tail end of the sling is lower than the bottom surface of the box beam. (5) Place the lower joist below the front and rear ends of the box beam (since the box beam is placed on the base, the ends of the box beam are at a certain height from the ground), and then insert the tail end of the sling into the slot hole in the second U-shaped connecting groove on the lower joist so that the limit head at the tail end of the sling is stuck below the second U-shaped connecting groove; (6) The cranes in the two beam moving machines are lifted synchronously to lift the box beam and make it leave the base. Then, the cranes are moved synchronously to move the box beam and complete the operation of a single box beam. (7) After the box beam is moved, the limit head at the tail end of the sling is pulled out from the second U-shaped connection groove, the lower support beam is removed, and the crane continues to lift the sling to completely pull the sling out of the box beam. At this time, repeat steps (3) to (6) to move the next box beam. (8) After all the box girders have been moved, or when it is necessary to switch to another mode, follow the reverse steps (1)-(2) to remove the slings and lift the girders.

9. The hoisting method according to claim 7, characterized in that: The prefabricated pier column hoisting mode comprises the following steps: (1) moving two overhead cranes in the beam moving machine inward so that the distance between the two cranes matches the width of the shoulder beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the shoulder beam through a pin shaft; (2) lifting the shoulder pole beam to a certain height to make it off the ground, then passing the head ends of the four first suspension rods through the four transverse waist holes on the shoulder pole beam, and then connecting them with nuts and washers, and then installing the two lower adjustment beams at the tail ends of the four first suspension rods respectively; (3) The crane continues to lift the lower adjustment beam to a certain height to make it off the ground, and then passes the head ends of the four second suspension rods through the four longitudinal waist holes on the lower adjustment beam, and then connects them with nuts and washers; (4) According to the positions of the four lifting holes on the segment to be transported, adjust the lateral and longitudinal positions of the first suspension rod and the second suspension rod on the sling so that the positions of the four second suspension rods correspond to the positions of the four lifting holes; the crane continues to lift so that the tail height of the second suspension rod exceeds the top height of the segment; (5) The beam moving machine is moved as a whole to the segment to be moved, and then the position is adjusted so that the four second suspension rods are located directly above the lifting holes on the segment. The crane then lowers the sling so that the tail of the second suspension rod is deeply inserted into the lifting hole. (6) The staff enters the interior of the segment and installs the gasket and nut at the tail end of the second boom; (7) The crane in the beam moving machine is lifted to lift the segment of the prefabricated pier column, so that the segment is off the ground, and then the segment is moved by the synchronous movement of the crane to complete the operation of a single segment beam; (8) After the segment is transported, remove the nut at the tail end of the second suspension rod, and then lift the crane to completely pull the second suspension rod out of the segment. Then repeat steps (4) to (7) to carry out the transport operation of the next prefabricated pier segment. (9) After all the prefabricated pier column segments have been transported, or when it is necessary to switch to another mode, the second suspension rod, the lower adjustment beam, the first suspension rod and the shoulder beam can be removed in sequence according to the reverse steps (1) to (3).

10. The hoisting method according to claim 7, characterized in that: The single-machine lifting mode includes the following steps: (1) moving two overhead cranes in the beam moving machine outward so that the distance between them matches the length of the box beam, and then lowering the movable pulley block to the ground, and connecting the movable pulley block to the lifting lug of the lifting beam through a pin shaft; the movable pulley blocks in the two overhead cranes are respectively connected to the two lifting beams; (2) Lift the hoisting beam to a certain height to lift it off the ground, then pass the head ends of the four third suspension rods through the four hoisting holes on the hoisting beam and connect them with nuts and washers; (3) The crane continues to lift until the tail of the third boom is higher than the top of the box girder; (4) The beam moving machine is moved as a whole to the box beam to be moved, and then the position is adjusted so that the four third suspension rods in one suspension device are located directly above the lifting hole at one end of the box beam, and the four third suspension rods in another suspension device are located directly above the lifting hole at the other end of the box beam, and then the crane lowers the suspension device so that the tail of the third suspension rod is deeply inserted into the lifting hole; (5) The staff enters the box girder and installs the gasket and nut at the tail end of the third hanger rod; (6) The crane in the beam moving machine is lifted to lift the box beam, so that the box beam is off the ground, and then the box beam is moved by the synchronous movement of the crane to complete the operation of a single box beam; (7) After the box beam is moved, remove the nut at the end of the third suspension rod, and then lift the crane to completely pull the third suspension rod out of the box beam. Then repeat steps (3) to (6) to move the next box beam. (8) After all the box girders have been moved, or when it is necessary to switch to other modes, follow the reverse steps of steps (1)-(2) to remove the third suspension rod and the lifting beam in sequence.

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