Beam-transporting and bridge-ascending rail transfer structure and rail transfer and bridge-ascending method

Abstract

The present invention discloses a beam transporting and bridge transferring track structure, which includes a lower-layer bridge, and a track mechanism is provided on the lower-layer bridge; a beam yard is arranged on one side of the lower-layer bridge, an auxiliary road is provided at the beam discharging end of the beam yard, and an auxiliary track mechanism intersecting with the track mechanism is provided on the auxiliary road; each track mechanism includes left and right track mechanisms; both the left and right track mechanisms include a concrete foundation, and a support track is fixedly connected to the top of the concrete foundation; a support block is arranged on the concrete foundation at the intersection position of the support tracks, and the side length of the support block is the same width as the tops of the two intersecting support tracks; the two intersecting support tracks are provided with breaks at the intersection. The present invention also discloses a corresponding method for transferring the track onto the bridge. By adopting the present invention, during the process of transporting the beam onto the bridge, the track transfer operation of the beam transporting trolley can be realized without rotating the transported box girder segment, which is convenient and fast, saves the energy required for rotating the overweight box girder segment, and there is no need to specially plan the operation space for rotating the extra-long box girder segment.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction. Background Art

[0002] With the development of cities and the improvement of people's living standards, the number of motor vehicles in China has been increasing rapidly year by year, which has brought increasing pressure to traffic. In some places with large traffic flow, the traffic capacity of existing single-layer bridges cannot meet people's traffic needs. In order to ensure smooth traffic, it is necessary to build a new bridge (i.e., the upper bridge) above the existing bridge (the lower bridge) to increase the traffic capacity.

[0003] Bridges usually have two-way traffic lanes, and there are two bridge decks, namely the left bridge deck and the right bridge deck. The lanes in one direction are on the same bridge deck.

[0004] The passing standard for bridge load-bearing is that the axle load cannot exceed 50 tons. However, the box girder segments of large bridges are often extremely long and heavy. If a carrier vehicle is used to transport the upper box girder segments on the existing lower bridge, only small box girder segments can be transported. For box girder segments with a single box girder segment weighing more than 100 tons, it is difficult to ensure that the axle load does not exceed 100 tons. When the box girder segment is more than 200 tons, it is impossible to ensure that the axle load does not exceed 100 tons.

[0005] Building a bridge on an existing bridge has the advantage of not occupying additional ground space for the new bridge, without the need for demolition. It not only increases the traffic capacity but also does not require bearing high demolition costs, so it has a wide application prospect.

[0006] When designing a technical solution for transporting the box girder of the upper bridge on the existing bridge, in addition to overcoming problems such as overweight axle load, it is also necessary to overcome the problem of how to transport the box girder of the upper bridge onto the existing bridge.

[0007] As Figure 1 and Figure 2 shown, for construction convenience, the most favorable construction location of the beam yard 23 is adjacent to the existing bridge. Since the new bridge is located above the existing bridge, the existing bridge is referred to as the lower bridge in the present invention and is parallel to the lower bridge 24. A connecting road 25 connecting the beam yard 23 and the lower bridge 24 needs to be built between the beam yard 23 and the lower bridge 24. When transporting the box girder of the upper bridge from the beam yard 23 to the lower bridge 24, it is necessary to transport the box girder onto the lower bridge 24 via the connecting road 25.

[0008] To overcome the problem of overweight axle load, the applicant has designed a brand-new beam transportation method of double-deck bridge plus track, that is, track mechanisms are simultaneously arranged on the double-deck bridge decks of the lower bridge 24. Similarly, a corresponding auxiliary track mechanism needs to be arranged on the connecting road 25 corresponding to the track mechanism on the lower bridge 24.

[0009] SeeFigure 1 and Figure 2 The auxiliary road 25 is vertically connected to the lower bridge 24. After the box girder enters the lower bridge 24 through the auxiliary road 25, according to the existing idea of transporting the beam, a technical problem of how to make the beam transporting trolley and the box girder achieve a 90-degree turn will be encountered.

[0010] The box girder segment is overweight and overlong. For a 90-degree turn, on the one hand, a huge space is required for the box girder segment to rotate; on the other hand, the box girder segment is very heavy, and it is difficult to achieve a 90-degree rotation of the box girder segment without using a gantry crane (it is difficult to erect a gantry crane on the lower bridge 24).

[0011] The auxiliary track mechanism is bound to intersect with the track mechanism on the lower bridge 24 at a 90-degree angle, making it very difficult to achieve a 90-degree track transfer for each beam transporting trolley traveling along the track without the aid of a lifting tool in the existing technology. Summary of the Invention

[0012] The purpose of the present invention is to provide a beam transporting and bridge transferring track structure, which does not require the rotation of the box girder when transporting the beam onto the bridge, facilitates large-angle (90-degree) track transfer for each beam transporting trolley without the aid of a lifting tool, and disperses the axle load through the track, providing a basis for transporting overweight box girder segments to the existing bridge.

[0013] To achieve the above purpose, the present invention provides a beam transporting and bridge transferring track structure including an existing bridge, the existing bridge is a lower bridge, and a track mechanism is provided on the lower bridge; an approach slab yard is provided on one side of the lower bridge, and an auxiliary road is provided at the beam outlet end of the approach slab yard, and the auxiliary road connects the approach slab yard and the lower bridge;

[0014] An auxiliary track mechanism is provided on the auxiliary road, and the auxiliary track mechanism intersects with the track mechanism; the track mechanism on the lower bridge includes the first to fourth track mechanisms arranged in parallel side by side, and the auxiliary track mechanism on the auxiliary road includes the fifth and sixth track mechanisms; the fifth and sixth track mechanisms respectively intersect with the first to fourth track mechanisms and form 8 intersections;

[0015] On the lower bridge, the length direction of the lower bridge is the front-back direction, and the beam transporting direction is the forward direction; on the auxiliary road, the length direction of the auxiliary road is the front-back direction, and the beam transporting direction is the forward direction;

[0016] The structures of each track mechanism are the same, and each includes a left track mechanism and a right track mechanism; the structures of the left track mechanism and the right track mechanism are the same, and each includes a concrete foundation laid along the front-back direction, and a support track is fixedly connected upward in the middle in the left-right direction on the top of the concrete foundation; the support track is used to support the beam transporting trolley;

[0017] At the intersection of each track mechanism, the concrete bases of the two intersecting track mechanisms are horizontally connected. A square support block is provided on the concrete base where the support tracks intersect at the intersection point. The side length of the support block is the same as the top width of the two intersecting support tracks; there are breaks at the intersection of the two intersecting support tracks. The four sides of the support block are respectively facing the support tracks on one side of the break. There are gaps between the four sides of the support block and the support tracks it faces, and the gaps are the same. This gap is less than or equal to one-fourth of the diameter of the running wheels of the beam transport trolley.

[0018] A rotary support mechanism is provided on the lower deck at the intersection of each track;

[0019] The rotary support mechanism includes a bottom plate. A bracket is provided on the bottom plate. A forward and reverse frequency conversion motor is provided on the bottom plate on one side of the bracket. A rotary support device is hinged on the bottom plate on the other side of the bracket. The rotary support device is a hydraulic cylinder or an electric push rod or a cylinder; the extending rod of the rotary support device is hinged with a load-bearing plate for temporary support;

[0020] The output shaft of the forward and reverse frequency conversion motor is connected with a traction rope. A fixed pulley is provided at the top of the bracket. The traction rope bypasses the fixed pulley and is connected to one side of the upper part of the rotary support device. The other side of the upper part of the rotary support device is connected with a return spring, and the return spring is connected with the bottom plate.

[0021] A first travel switch is provided on the side of the bracket adjacent to the rotary support device, and a second travel switch corresponding to the rotary support device is provided on the bottom plate;

[0022] The rotary support device has a lying position and a vertical position; when the rotary support device is in the lying position, the second travel switch is pressed. At this time, the return spring is in a relaxed state or a compressed state; when the rotary support device is in the lying position, it is lower than the box girder segment transported by the beam transport trolley;

[0023] When the rotary support device is in the vertical position, the first travel switch is pressed. At this time, the return spring is in a stretched state, and the load-bearing plate faces upward; when the rotary support device is in the vertical position and its extending rod is in a contracted state, the load-bearing plate is lower than the box girder segment transported by the beam transport trolley.

[0024] The beam transport trolley includes a horizontally arranged vehicle frame. The running wheels are respectively installed at the four corners of the vehicle frame through wheel axles. An electric motor is provided on the vehicle frame. The electric motor is in transmission connection with the wheel axles of each running wheel through a transmission mechanism; a jacking device for supporting the box girder segment to be transported is provided on the vehicle frame; the jacking device has a jacking rod that can be telescoped up and down. The top of the jacking rod is hinged with a support plate for supporting the box girder segment to be transported.

[0025] In the middle of the frame of the beam transport trolley, there is a support groove with an open bottom connected downward. The groove wall of the support groove is rotatably connected with a rotating disc through a bearing, and the rotating disc is slidably matched with the lower side wall of the support groove; in the middle of the rotating disc, there is a rail support device connected downward. The rail support device is a hydraulic cylinder or an electric push rod or a cylinder; the rail support device has a protruding rod, and the protruding rod of the rail support device extends downward and is connected with a support disc. The center of gravity of the beam transport trolley is located directly above the rail support device.

[0026] The motors on each beam transport trolley adopt variable-frequency reduction motors; each beam transport trolley is provided with a first wireless communication module; outside the beam transport trolley, there is a movable electric control device, and the electric control device is connected with a storage battery and a second wireless communication module; the rotary support device, the rail support device, the forward and reverse variable-frequency motor, the first travel switch and the second travel switch are all connected with a third wireless communication module;

[0027] The variable-frequency reduction motor and the pushing device are both connected with the first wireless communication module, and the first wireless communication module and the third wireless communication module are respectively connected with the electric control device through the second wireless communication module.

[0028] The present invention also discloses a method for transferring a beam onto a bridge using the above-mentioned beam transfer and bridge transfer structure, which is carried out according to the following steps: There is a gantry crane in the beam yard; in the initial state, the rotary support device is in a lying position;

[0029] The first step is the hoisting step;

[0030] Make 8 beam transport trolleys drive to the positions corresponding to the auxiliary rail mechanism in the beam yard, and the relative positions between the 8 beam transport trolleys are the same as the relative positions between the 8 crossing points of the rail mechanism;

[0031] Use the gantry crane in the beam yard to hoist the box girder segments for building the upper bridge onto the 8 beam transport trolleys, and the length direction of the box girder segments is perpendicular to the beam transport direction of the lower bridge;

[0032] The second step is the bridge-up step; start the variable-frequency reduction motors on each beam transport trolley through the electric control device, drive each beam transport trolley carrying the box girder segments to start synchronously and make each beam transport trolley run to the 8 crossing points of the rail mechanism. At this time, the running wheels of each beam transport trolley respectively support on the support blocks at the corresponding crossing points;

[0033] The third step is the temporary support step;

[0034] Synchronously start the forward and reverse frequency conversion motors of each rotary support mechanism, so that the forward and reverse frequency conversion motors drive the rotary support device to rotate and rise to the vertical position through the traction rope. At this time, each rotary support device presses the first travel switch, and at the same time, the return springs of each rotary support mechanism are in a stretched state; after the rotary support device presses the first travel switch, the electronic control device controls the corresponding forward and reverse frequency conversion motors to stop, and controls the extension rod of the corresponding rotary support device to extend upward, so that the bearing plate presses upward and supports the box girder segment;

[0035] The fourth step is the step of changing the track of the girder transport cart;

[0036] The electronic control device controls the push rod of the jacking device of the girder transport cart to retract downward. At this time, the box girder segment is supported by each rotary support mechanism, and the girder transport cart is in a free state; the operator rotates each girder transport cart so that the running wheels of each girder transport cart correspond to the corresponding support tracks on the lower layer bridge;

[0037] The fifth step is the step of removing the temporary support;

[0038] The electronic control device controls the push rod of the jacking device of the girder transport cart to extend upward, so that the support plate presses upward and supports the box girder segment;

[0039] Then the electronic control device controls the forward and reverse frequency conversion motors of each rotary support mechanism to reverse. Under the pulling force of each return spring, each rotary support device rotates to the lying position. During this process, the rotation speed of the forward and reverse frequency conversion motors is controlled to control the rotation speed of the rotary support device to lie down;

[0040] After the rotary support device presses the second travel switch, the electronic control device controls the corresponding forward and reverse frequency conversion motors to stop, and the step of removing the temporary support is completed;

[0041] After removing the temporary support, the box girder segment can be transported to the construction position along the first to fourth tracks on the lower layer bridge.

[0042] In the first step, before hoisting the box girder segment onto each girder transport cart, the staff controls the jacking devices on each girder transport cart through the electronic control device, adjusts the up and down telescopic positions of the push rods of each jacking device, so that the support plates of the jacking devices of each girder transport cart are in the same horizontal position;

[0043] After the box girder segment to be transported is hoisted onto each girder transport cart, the staff controls the jacking devices through the electronic control device, adjusts the up and down telescopic positions of the push rods of each jacking device, so that the support plates of the jacking devices of each girder transport cart are all pressed against the box girder segment;

[0044] In the second step, the staff synchronously controls the working frequencies of the variable frequency reduction motors of each girder transport cart through the electronic control device, thereby synchronously adjusting the running speeds of each girder transport cart to the predetermined speed, so that each girder transport cart runs at the same speed.

[0045] In the fourth step, i.e., the step of changing the tracks of the beam transport trolley, before the operator rotates each beam transport trolley, the track-changing support device of each beam transport trolley is controlled by an electric control device to make the extending rod of the track-changing support device extend downward so that the support disc supports on the lower deck; continue to make the extending rod of the track-changing support device extend downward, so that the track-changing support device presses upward against the frame of the beam transport trolley until the walking wheels of the beam transport trolley leave the support blocks upward.

[0046] Then the operator manually rotates each beam transport trolley to make the frame and support groove of each beam transport trolley rotate around the rotating disc until the walking wheels of each beam transport trolley correspond to the corresponding support tracks on the first to fourth track mechanisms.

[0047] The present invention has the following advantages:

[0048] The present invention can disperse the weight of the overweight box girder segment along the length direction of the access road and the lower bridge through the first to sixth track mechanisms via the concrete foundation, greatly reducing the axle load and avoiding the access road or the lower bridge being crushed due to the axle load exceeding 100 tons.

[0049] In the present invention, a break is provided at the intersection of two intersecting support tracks. The settings of the break and its internal support blocks, etc., such as there being gaps between the four sides of the support block and the corresponding support track opposite to it and the gaps being the same, and the gap being less than or equal to one-fourth of the diameter of the walking wheel of the beam transport trolley, not only facilitate the beam transport trolley to move forward or backward without obstruction along the original track, but also facilitate the beam transport trolley to change tracks (90 degrees) at the intersection of the support tracks.

[0050] Through the rotating support mechanism, the present invention can conveniently temporarily support the transported box girder segment at the intersection of the support tracks, so that the beam transport trolley is not loaded when changing tracks, which not only facilitates track changing but also achieves the technical effect that the box girder segment does not rotate when changing tracks, facilitating the transportation of the box girder segment and reducing the energy required for track changing.

[0051] The rotating support mechanism can be erected to support the box girder segment when needed, and the rotating support device can be made to reduce the height when no track-changing operation is performed, greatly reducing the probability of the rotating support device hooking foreign objects, interfering with the operation of the beam transport trolley or the box girder segment. When performing track-changing operations, the rotating support device can be conveniently erected to temporarily support the box girder segment.

[0052] The settings of relevant structures such as the track-changing support device, after lifting the beam transport trolley upward from the support track, the operator can easily rotate the beam transport trolley, and it is not necessary to manually lift or move the beam transport trolley to make the walking wheels of the beam transport trolley correspond to the corresponding support tracks on the lower bridge, completing the track-changing operation more easily and quickly.

[0053] The first travel switch and the second travel switch enable the electric control device to accurately control the start and stop of the forward and reverse frequency conversion motor, thereby accurately controlling the rotation position of the rotation support device.

[0054] The electric control device is connected with each controlled device through the second wireless communication module, so that the operator can carry the electric control device and move with the beam transporting trolley to control it during movement.

[0055] The setting of the jacking rod can flexibly adjust the total height of the jacking device of each beam transport trolley. On the one hand, it can adjust the height between the transported box beam segment and the ground to ensure that the box beam segment in transportation avoids the bridge deck facilities. On the other hand, it can ensure that the jacking device of each beam transport trolley is in good contact with the box beam segment, so that the jacking device of each beam transport trolley can play a good supporting role. Since the bottom surface of the box beam segment may not be absolutely horizontal, after the box beam segment is hoisted onto each beam transport trolley, each support plate will be adaptively rotated according to the bottom surface of the box beam segment it contacts, ensuring that the support plate is in good contact with the box beam segment, avoiding damage to the support plate or the bottom surface of the box beam segment due to the angle between the support plate and the bottom surface of the box beam segment.

[0056] Compared with laying the track directly on the bridge deck, the setting of the concrete foundation can further reduce the pressure on the bridge deck. The motor is connected to each running wheel through the transmission mechanism, and each running wheel is a driving wheel, which enables the beam transport trolley to have a better transportation capacity. The electronic control device controls the status of each beam transport trolley by wireless communication, which not only avoids the disadvantages of complicated cables brought by wired connection, but also can control all beam transport trolleys to operate in coordination.

[0057] By adopting the present invention, after the construction of various track mechanisms, the reciprocating operation of various beam transport trolleys can be controlled to conveniently realize the transportation of extra-long and extra-heavy box beam segments on existing bridges, ensuring that for existing bridges, the axle load will not exceed 50 tons during transportation (that is, the cross-bridge upward section load-bearing does not exceed 50 tons), breaking through the limitation of the prior art that existing bridges cannot transport extra-long and extra-heavy box beam segments (otherwise the existing bridges will be damaged or even collapsed after the axle load exceeds 50 tons), greatly improving the efficiency of beam transportation, and ensuring the efficient progress of bridge construction projects on the bridges.

[0058] By adopting the track-switching method for loading onto a bridge of the present invention, the track-switching operation of the beam transporting trolley can be achieved during the process of transporting the beam onto the bridge without rotating the transported box beam segments. This is very convenient and quick, and saves the energy required for rotating overweight box beam segments. There is no need to specially plan the working space for rotating overlong box beam segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is the plan layout of the beam yard for building the bridge and the existing bridge (looking down);

[0060] Figure 2 is Figure 1 the schematic cross-sectional view of B-B;

[0061] Figure 3 is the schematic structural view of the beam-transporting and bridge-ascending rail-switching structure, i.e., the schematic structural view at the intersection of the auxiliary road and the lower bridge;

[0062] Figure 4 is Figure 3 the enlarged view at A in , i.e., the enlarged view at the intersection of the track mechanisms;

[0063] Figure 5 is the schematic structural view of the slewing support mechanism when the slewing support device is in the lying position;

[0064] Figure 6 is the schematic structural view of the slewing support mechanism when the slewing support device is in the vertical position;

[0065] Figure 7 is the schematic structural view of the beam-transporting trolley on the track mechanisms;

[0066] Figure 8 is the electrical control schematic diagram of the present invention. Detailed implementation manners

[0067] As Figures 1 to 8 shown, the beam-transporting and bridge-ascending rail-switching structure of the present invention includes an existing bridge, the existing bridge is the lower bridge 24, and a track mechanism is provided on the lower bridge 24; a beam yard 23 is provided on one side of the lower bridge 24, and an auxiliary road 25 is provided at the beam-out end of the beam yard 23, and the auxiliary road 25 connects the beam yard 23 and the lower bridge 24; the auxiliary road 25 is constructed at a lower position of the lower bridge 24, preferably at the connection between the lower bridge 24 and the horizontal road surface, and at this time, there will be no Figure 2 inclined section shown in .

[0068] An auxiliary track mechanism is provided on the auxiliary road 25, and the auxiliary track mechanism intersects with the track mechanism; the track mechanism on the lower bridge 24 includes the first to fourth track mechanisms 5, 6, 7, 8 arranged in parallel side by side, and the auxiliary track mechanism on the auxiliary road 25 includes the fifth and sixth track mechanisms 26, 27; the fifth and sixth track mechanisms 26, 27 respectively intersect with the first to fourth track mechanisms 5, 6, 7, 8 and form 8 intersections;

[0069] On the lower bridge 24, the length direction of the lower bridge 24 is the front-back direction, and the beam-transporting direction is the forward direction; on the auxiliary road 25, the length direction of the auxiliary road 25 is the front-back direction, and the beam-transporting direction is the forward direction;

[0070] The structures of each track mechanism (the first to the sixth track mechanisms) are the same, and each includes a left track mechanism and a right track mechanism; the structures of the left track mechanism and the right track mechanism are the same, and each includes a concrete foundation 12 laid along the front-rear direction. At the middle of the top of the concrete foundation 12 in the left-right direction, a support track 13 is fixedly connected upward. The support track 13 is used to support the beam transporting trolley 1.

[0071] At the intersection of each track mechanism, the concrete foundations 12 of the two intersecting track mechanisms are horizontally connected. At the intersection of the support tracks 13, a square support block 28 is provided on the concrete foundation 12 at the intersection point. The side length of the support block 28 is the same as the top width of the two intersecting support tracks 13. At the intersection of the two intersecting support tracks 13, there is a break 29. The four sides of the support block 28 are respectively facing the support tracks 13 on one side of the break 29. There are gaps between the four sides of the support block 28 and the support tracks 13 they face, and the gaps are the same. This gap is less than or equal to one-fourth of the diameter of the running wheels of the beam transporting trolley 1.

[0072] A rotary support mechanism 30 is provided on the lower deck at the intersection of each track; the rotary support mechanism 30 includes a bottom plate 31. A bracket 32 is provided on the bottom plate 31. A forward and reverse frequency conversion motor 33 is provided on the bottom plate 31 on one side of the bracket 32. A rotary support device 34 is hinged on the bottom plate 31 on the other side of the bracket 32. The rotary support device 34 is a hydraulic cylinder or an electric push rod or a cylinder; the extending rod of the rotary support device 34 is hinged with a load-bearing plate 35 for temporary support; when a hydraulic cylinder is used, the hydraulic mechanism includes a hydraulic pump station and a hydraulic cylinder. The hydraulic cylinder is connected to the control valve group (solenoid valve group) in the hydraulic pump station through a pipeline. The electric control device is connected to the hydraulic pump and the control valve group in the hydraulic pump station through a second wireless communication device. This is a conventional technology and will not be elaborated here.

[0073] The output shaft of the forward and reverse frequency conversion motor 33 is connected with a traction rope 36. A fixed pulley 37 is provided at the top of the bracket 32. The traction rope 36 bypasses the fixed pulley 37 and is connected to the upper part on one side of the rotary support device 34. The upper part on the other side of the rotary support device 34 is connected with a return spring 38, and the return spring 38 is connected with the bottom plate 31.

[0074] A first travel switch 39 is provided on one side of the bracket 32 adjacent to the rotary support device 34. A second travel switch 40 corresponding to the rotary support device 34 is provided on the bottom plate 31.

[0075] The rotary support device 34 has a lying position and a vertical position; when the rotary support device 34 is in the lying position, it presses the second travel switch 40. At this time, the return spring 38 is in a relaxed state or a compressed state; when the rotary support device 34 is in the lying position, it is lower than the box girder segment transported by the beam transporting trolley 1.

[0076] When the rotating support device 34 is in a vertical position, the first travel switch 39 is pressed, at which time the return spring 38 is in a stretched state, and the bearing plate 35 is facing upward; when the rotating support device 34 is in a vertical position and its extension rod is in a retracted state, the bearing plate 35 is lower than the box beam segment transported by the beam transport trolley 1;

[0077] The first travel switch 39 and the second travel switch 40 are preferably push-type travel switches, and travel switches with button rods may also be used. Both are existing technologies, and the specific structures are not described in detail.

[0078] The beam transport trolley 1 includes a horizontally arranged frame 14, and the travel wheels 16 are respectively installed at the four corners of the frame 14 through wheel axles 15. An electric motor 17 is provided on the frame 14, and the electric motor 17 is connected to the wheel axles 15 of each travel wheel 16 through a transmission mechanism; the electric motor 17 drives the travel wheels through the transmission mechanism, which is a conventional structure and will not be described in detail.

[0079] The frame 14 is provided with a jacking device 21 for supporting the transported box beam segment; the jacking device 21 has a jacking rod 10 that can be extended and retracted up and down, and a support plate 11 for supporting the transported box beam segment is hinged on the top of the jacking rod 10. The jacking device 21 is an electric push rod or a hydraulic mechanism, both of which are conventional technologies and will not be described in detail.

[0080] A support groove 41 with a bottom opening is connected downwardly in the middle of the frame 14 of the beam transport trolley 1, and a rotating disk 43 is rotatably connected to the inner groove wall of the support groove 41 through a bearing 42. The rotating disk 43 slides with the lower side wall of the support groove 41, so that the lower side wall of the support groove 41 can support the rotating disk 43 upward; a shunting support device 44 is connected downwardly in the middle of the rotating disk 43, and the shunting support device 44 is a hydraulic cylinder or an electric push rod or an air cylinder; the shunting support device 44 has an extension rod, and the extension rod of the shunting support device 44 extends downward and is connected to a support disk 45 on the lower bridge deck for supporting the intersection of the track mechanism. The center of gravity of the beam transport trolley 1 is located directly above the shunting support device 44.

[0081] With the arrangement of the transfer support device 44 and other related structures, after the beam transport trolley 1 is pushed upward off the support rail 13, the operator can easily turn the beam transport trolley 1 without manually lifting the beam transport trolley 1 or moving the beam transport trolley 1, so that the running wheels 16 of the beam transport trolley 1 can correspond to the corresponding support rail 13 on the lower bridge 24, thereby completing the transfer operation more easily and quickly.

[0082] The motors 17 on each beam transporting trolley 1 adopt variable frequency reduction motors; each beam transporting trolley 1 is provided with a first wireless communication module 18; outside the beam transporting trolley, there is a movable electric control device 19, and the electric control device 19 is connected with a storage battery 22 and a second wireless communication module 20; the rotary support device 34, the rail transfer support device 44, the forward and reverse variable frequency motor 33, the first travel switch 39 and the second travel switch 40 are all connected with a third wireless communication module 46; the electric control device 19 preferably adopts a PLC, and can also adopt forms such as integrated circuits and notebook computers.

[0083] The variable frequency reduction motor and the pushing device 21 are both connected with the first wireless communication module 18, and the first wireless communication module 18 and the third wireless communication module 46 are respectively connected with the electric control device 19 through the second wireless communication module 20.

[0084] The first to third wireless communication modules 18, 20, 46 can adopt wifi modules, bluetooth modules, zigbee modules, etc., and preferably adopt zigbee modules.

[0085] The present invention also discloses a method for transferring and bridging the beam using the above-mentioned beam transporting and bridge transferring structure, which is carried out according to the following steps: a gantry crane is arranged in the beam yard 23; in the initial state, the rotary support device 34 is in the lying position;

[0086] The first step is the hoisting step;

[0087] Make 8 beam transporting trolleys 1 drive to the corresponding auxiliary rail mechanism at the position corresponding to the beam yard 23, and the relative positions between the 8 beam transporting trolleys 1 are the same as the relative positions between the 8 intersections of the rail mechanism;

[0088] Use the gantry crane in the beam yard 23 to hoist the box girder segment for building the upper layer bridge onto the 8 beam transporting trolleys 1, and the length direction of the box girder segment (the length direction of the box girder segment is the width direction of the upper layer bridge) is perpendicular to the beam transporting direction of the lower layer bridge 24;

[0089] The second step is the bridging step; start the variable frequency reduction motors on each beam transporting trolley 1 through the electric control device 19, drive each beam transporting trolley 1 carrying the box girder segment to start synchronously and make each beam transporting trolley 1 run to the 8 intersections of the rail mechanism. At this time, the traveling wheels 16 of each beam transporting trolley 1 respectively support on the support blocks 28 at the corresponding intersection positions;

[0090] The third step is the temporary support step;

[0091] Synchronously start the forward and reverse frequency conversion motors 33 of each rotary support mechanism 30, so that the forward and reverse frequency conversion motors 33 drive the rotary support device 34 to rotate and rise to the vertical position through the traction rope 36. At this time, each rotary support device 34 presses the first travel switch 39, and at the same time, the return springs 38 of each rotary support mechanism 30 are in a stretched state; after the rotary support device 34 presses the first travel switch 39, the electronic control device 19 controls the corresponding forward and reverse frequency conversion motors 33 to stop, and controls the extension rod of the corresponding rotary support device 34 to extend upward, so that the load-bearing plate 35 presses upward and supports the box girder segment;

[0092] The fourth step is the rail-changing step of the beam transport trolley 1;

[0093] The electronic control device 19 controls the push rod 10 of the jacking device 21 of the beam transport trolley 1 to retract downward. At this time, the box girder segment is supported by each rotary support mechanism 30, and the beam transport trolley 1 is in a free state; the operator rotates each beam transport trolley 1 so that the running wheels 16 of each beam transport trolley 1 correspond to the corresponding support rails 13 on the lower layer bridge 24;

[0094] The fifth step is the step of removing the temporary support;

[0095] The electronic control device 19 controls the push rod 10 of the jacking device 21 of the beam transport trolley 1 to extend upward, so that the support plate 11 presses upward and supports the box girder segment;

[0096] Then the electronic control device 19 controls the forward and reverse frequency conversion motors 33 of each rotary support mechanism 30 to reverse. Under the pulling force of each return spring 38, each rotary support device 34 rotates to the lying position. During this process, the rotation speed of the forward and reverse frequency conversion motor 33 is controlled to control the rotation speed of the rotary support device 34 when lying down;

[0097] After the rotary support device 34 presses the second travel switch 40, the electronic control device 19 controls the corresponding forward and reverse frequency conversion motors 33 to stop, and the step of removing the temporary support is completed;

[0098] After removing the temporary support, the box girder segment can be transported to the construction position along the first to fourth tracks on the lower layer bridge surface.

[0099] The length direction of the box girder segment is perpendicular to the beam transport direction of the lower layer bridge 24. The length direction of the box girder segment is the width direction of the upper layer bridge, which is convenient for the box girder segment to straddle the double-track bridge surfaces running in opposite directions at the same time, so that the weight of the overweight box girder segment can be jointly borne by the double-track bridge surfaces running in opposite directions, doubling the load-bearing capacity of the lower layer bridge 24.

[0100] In the first step, before the box beam segment is hoisted onto each beam transport trolley 1, the staff controls the jacking device 21 on each beam transport trolley 1 through the electric control device 19, and adjusts the upward and downward telescopic position of the jacking rod 10 of each jacking device 21, so that the support plates 11 of the jacking devices 21 of each beam transport trolley 1 are at the same horizontal position;

[0101] After the box girder segments to be transported are hoisted onto each beam transport trolley 1, the staff controls the jacking device 21 through the electric control device 19 to adjust the upward and downward telescopic positions of the jacking rods 10 of each jacking device 21, so that the support plates 11 of the jacking devices 21 of each beam transport trolley 1 are pressed against the box girder segments;

[0102] In the second step, the staff synchronously controls the operating frequency of the variable frequency reduction motor of each beam transport trolley 1 through the electronic control device 19, thereby synchronously adjusting the running speed of each beam transport trolley 1 to a predetermined speed, so that each beam transport trolley 1 runs at the same speed.

[0103] In the fourth step, i.e., the step of changing the rails of the beam transport trolley 1, before the operator rotates each beam transport trolley 1, the operator controls the rail-switching support device 44 of each beam transport trolley 1 through the electric control device 19, so that the extension rod of the rail-switching support device 44 extends downward, so that the support plate 45 is supported on the lower bridge deck; the extension rod of the rail-switching support device 44 continues to extend downward, so that the rail-switching support device 44 presses the frame 14 of the beam transport trolley 1 upward, until each running wheel 16 of the beam transport trolley 1 leaves the support block 28 upward;

[0104] Then the operator manually rotates each beam transport trolley 1 so that the frame 14 and the support groove 41 of each beam transport trolley 1 rotate around the rotating disk 43 until the running wheels 16 of each beam transport trolley 1 correspond to the corresponding support rails 13 on the first to fourth track mechanisms 5, 6, 7, and 8.

[0105] The present invention changes the weight transfer mode of the previous point contact between the wheel and the bridge surface to the weight transfer mode of the track (specifically the concrete foundation 12) and the bridge surface line contact through the first to sixth track mechanisms. The bridge axle load refers to the load-bearing of the bridge on the cross section of the bridge upward from the transverse bridge. The present invention uses the track load-bearing method to disperse the weight of the box girder segment to various parts of the bridge in the longitudinal direction (the length direction of the bridge) through each track mechanism when transporting box girder segments of the same weight, greatly reducing the bridge axle load (the weight borne on the cross section of the bridge), so that the existing bridge can transport overweight box girder segments instead of being unable to transport overweight box girder segments in the past, ensuring that the existing bridge is not crushed or collapsed.

[0106] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the present invention, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. Beam transporting and bridge transferring track structure, Characterized in that: It includes an existing bridge, the existing bridge is the lower - layer bridge, and a track mechanism is provided on the lower - layer bridge; there is a beam yard on one side of the lower - layer bridge, an auxiliary road is provided at the beam - discharging end of the beam yard, and the auxiliary road connects the beam yard and the lower - layer bridge; An auxiliary track mechanism is provided on the auxiliary road, and the auxiliary track mechanism intersects with the track mechanism; the track mechanism of the lower - layer bridge includes the first to fourth track mechanisms arranged in parallel side by side, and the auxiliary track mechanism on the auxiliary road includes the fifth and sixth track mechanisms; the fifth and sixth track mechanisms respectively intersect with the first to fourth track mechanisms and form 8 intersections; On the lower - layer bridge, the length direction of the lower - layer bridge is the front - back direction, and the beam - transporting direction is the forward direction; on the auxiliary road, the length direction of the auxiliary road is the front - back direction, and the beam - transporting direction is the forward direction; The structures of each track mechanism are the same, and each includes a left - track mechanism and a right - track mechanism; the structures of the left - track mechanism and the right - track mechanism are the same, and each includes a concrete foundation laid along the front - back direction, and a supporting track is fixedly connected upward in the middle of the left - right direction on the top of the concrete foundation; the supporting track is used to support the beam - transporting trolley; At the intersection of each track mechanism, the concrete foundations of the two intersecting track mechanisms are horizontally connected, and a square supporting block is provided on the concrete foundation at the intersection position of the supporting tracks. The side length of the supporting block is the same as the top width of the two intersecting supporting tracks; there are breaks at the intersection of the two intersecting supporting tracks. The four sides of the supporting block respectively face the supporting tracks on one side of the break, and there are gaps between the four sides of the supporting block and the supporting tracks it faces, and the gaps are the same. The gap is less than or equal to one - quarter of the diameter of the running wheel of the beam - transporting trolley; A rotary support mechanism is provided on the lower - layer bridge deck at each track intersection; The rotary support mechanism includes a bottom plate, a bracket is provided on the bottom plate, a forward - reverse frequency - conversion motor is provided on the bottom plate on one side of the bracket, and a rotary support device is hinged on the bottom plate on the other side of the bracket. The rotary support device is a hydraulic cylinder or an electric push rod or a cylinder; the extending rod of the rotary support device is hinged with a load - bearing plate for temporary support; The output shaft of the forward - reverse frequency - conversion motor is connected with a traction rope, a fixed pulley is provided at the top of the bracket, the traction rope bypasses the fixed pulley and is connected with the upper part on one side of the rotary support device, and a return spring is connected to the upper part on the other side of the rotary support device, and the return spring is connected with the bottom plate; A first travel switch is provided on one side of the bracket adjacent to the rotary support device, and a second travel switch corresponding to the rotary support device is provided on the bottom plate; The rotary support device has a lying - down position and a vertical position; when the rotary support device is in the lying - down position, it presses the second travel switch, and at this time the return spring is in a relaxed state or a compressed state; When the rotary support device is in the lying - down position, it is lower than the box - girder segment transported by the beam - transporting trolley; When the rotary support device is in the vertical position, it presses the first travel switch, and at this time the return spring is in a stretched state, and the load - bearing plate faces upward; when the rotary support device is in the vertical position and its extending rod is in a contracted state, the load - bearing plate is lower than the box - girder segment transported by the beam - transporting trolley; Both the first travel switch and the second travel switch adopt push - type travel switches; The beam transporting trolley includes a horizontally arranged frame. A jacking device for supporting the box girder segment to be transported is provided on the frame, and the jacking device is an electric push rod or a hydraulic mechanism.

2. The beam transporting and bridge transferring track structure according to claim 1, characterized in that: The traveling wheels are respectively installed at the four corners of the frame through wheel axles. A motor is provided on the frame, and the motor is in transmission connection with the wheel axles of the respective traveling wheels through a transmission mechanism; the jacking device has a jacking rod capable of telescoping up and down, and a support plate for supporting the box girder segment to be transported is hinged to the top of the jacking rod.

3. The beam transporting and bridge transferring track structure according to claim 2, characterized in that: A support groove with an open bottom is connected downward in the middle of the frame of the beam transporting trolley. A rotating disc is rotatably connected to the groove wall of the support groove through a bearing, and the rotating disc is in sliding fit with the lower side wall of the support groove; a track transferring support device is connected downward in the middle of the rotating disc, and the track transferring support device is a hydraulic cylinder, an electric push rod or a cylinder; the track transferring support device has a protruding rod, and the protruding rod of the track transferring support device extends downward and is connected with a support disc, and the center of gravity of the beam transporting trolley is located directly above the track transferring support device.

4. The beam transporting and bridge transferring track structure according to claim 3, characterized in that: The motors on each beam transporting trolley are variable frequency reduction motors; a first wireless communication module is provided on each beam transporting trolley; a movable electric control device is provided outside the beam transporting trolley, and the electric control device is connected with a storage battery and a second wireless communication module; the rotary support device, the track transferring support device, the forward and reverse variable frequency motor, the first travel switch and the second travel switch are all connected with a third wireless communication module; The variable frequency reduction motor and the jacking device are both connected with the first wireless communication module, and the first wireless communication module and the third wireless communication module are respectively connected with the electric control device through the second wireless communication module.

5. The track transferring and bridge mounting method using the track transferring and bridge mounting structure described in claim 4, characterized in that It is carried out according to the following steps: A gantry crane is set in the beam yard; in the initial state, the rotary support device is in the lying position; The first step is the hoisting step; Eight beam transporting trolleys are driven to the positions corresponding to the auxiliary track mechanism in the beam yard, and the relative positions between the eight beam transporting trolleys are the same as the relative positions between the eight intersections of the track mechanism; The box girder segments for constructing the upper layer bridge are hoisted onto the eight beam transporting trolleys by using the gantry crane in the beam yard, and the length direction of the box girder segments is perpendicular to the beam transporting direction of the lower layer bridge; The second step is the bridge mounting step; The variable frequency reduction motors on each beam transporting trolley are started through the electric control device, and the beam transporting trolleys carrying the box girder segments are driven to start synchronously and the beam transporting trolleys are run to the eight intersections of the track mechanism. At this time, the traveling wheels of each beam transporting trolley respectively support on the support blocks at the corresponding intersection positions; The third step is the temporary support step; The forward and reverse variable frequency motors of each rotary support mechanism are started synchronously, so that the forward and reverse variable frequency motors pull the rotary support device to rotate and rise to the vertical position through the towing rope. At this time, each rotary support device presses the first travel switch, and at the same time, the return springs of each rotary support mechanism are in a stretched state; After the rotary support device presses the first travel switch, the electronic control device controls the corresponding forward and reverse frequency conversion motors to stop, and controls the extension rod of the corresponding rotary support device to extend upward, so that the load-bearing plate presses upward and supports the box girder segment; The fourth step is the rail-changing step of the beam transport trolley; The electronic control device controls the push rod of the pushing device of the beam transport trolley to retract downward. At this time, the box girder segment is supported by each rotary support mechanism, and the beam transport trolley is in a free state; the operator rotates each beam transport trolley so that the traveling wheels of each beam transport trolley correspond to the corresponding support rails on the lower layer bridge; The fifth step is the step of removing the temporary support; The electronic control device controls the push rod of the pushing device of the beam transport trolley to extend upward, so that the support plate presses upward and supports the box girder segment; Then the electronic control device controls the forward and reverse frequency conversion motors of each rotary support mechanism to reverse. Under the pulling force of each reset spring, each rotary support device rotates to the lying position. During this process, the rotation speed of the forward and reverse frequency conversion motors is controlled to control the rotation speed of the rotary support device to lie down; After the rotary support device presses the second travel switch, the electronic control device controls the corresponding forward and reverse frequency conversion motors to stop, and the step of removing the temporary support is completed; After removing the temporary support, the box girder segment can be transported to the construction position along the first to fourth tracks on the lower layer bridge.

6. The rail-changing and bridge-ascending method according to claim 5, characterized in that: In the first step, before hoisting the box girder segment onto each beam transport trolley, the staff controls the pushing devices on each beam transport trolley through the electronic control device, adjusts the up and down telescopic positions of the push rods of each pushing device, so that the support plates of the pushing devices of each beam transport trolley are at the same horizontal position; After the box girder segment to be transported is hoisted onto each beam transport trolley, the staff controls the pushing device through the electronic control device, adjusts the up and down telescopic positions of the push rods of each pushing device, so that the support plates of the pushing devices of each beam transport trolley are all pressed against the box girder segment; In the second step, the staff synchronously controls the working frequencies of the frequency conversion and deceleration motors of each beam transport trolley through the electronic control device, thereby synchronously adjusting the running speeds of each beam transport trolley to a predetermined speed, so that each beam transport trolley runs at the same speed.

7. The rail-changing and bridge-ascending method according to claim 5, characterized in that: In the fourth step, namely the rail-changing step of the beam transport trolley, before the operator rotates each beam transport trolley, the electronic control device controls the rail-changing support device of each beam transport trolley, so that the extension rod of the rail-changing support device extends downward, so that the support disc supports on the lower layer bridge; continue to make the extension rod of the rail-changing support device extend downward, so that the rail-changing support device presses upward on the frame of the beam transport trolley until the traveling wheels of the beam transport trolley leave the support block upward; Then the operator manually rotates each beam transport trolley, so that the frame and support groove of each beam transport trolley rotate around the turntable until the traveling wheels of each beam transport trolley correspond to the corresponding support rails on the first to fourth track mechanisms.

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