Bridge replacement integrated machine

Abstract

The utility model provides a kind of can be under railway operating condition to damaged, aged railway simply supported T beam is dismantled and replaced, and can also consider bridge erecting and erecting beam replacement integrated machine.Errecting beam replacement integrated machine includes main beam and installs power system, electro-hydraulic control system and driver's cabin on main beam, two hoist trolleys that move along main beam are provided on main beam, main beam is also provided with: rear main supporting leg is connected in the front section and rear section of main beam;Front main supporting leg or bridge erecting supporting leg, connect in the front section of main beam;Walking wheel group is installed in the below of front main supporting leg and rear main supporting leg for driving whole machine walking;Auxiliary supporting leg is provided with one or two, connect in the front end or front and rear ends of main beam.In the utility model, beam replacement working condition and bridge erecting working condition only need to replace a few parts, and it is convenient and fast to switch between different working conditions.

Description

Technical Field

[0001] This utility model belongs to the field of bridge engineering technology, and in particular relates to an integrated bridge erection and beam replacement machine that can both dismantle and replace damaged and aged railway simply supported T-beams under railway operation conditions, and also perform bridge erection and beam installation. Background Technology

[0002] In recent years, with the rapid development of high-speed rail construction technology in my country, the mileage of high-speed railways in operation and under construction has grown rapidly, reaching a total of 46,000 kilometers. However, conventional railways, due to their earlier construction and longer operating cycles, still occupy a dominant position in my country's railway passenger transport. Currently, the operating mileage of conventional railways in my country is approximately 107,000 kilometers, far exceeding the total mileage of high-speed railways. Bridges constitute a large proportion of railway lines and are the main engineering component. In conventional railways, simply supported beams of 32 meters or less account for nearly 26%. Due to various factors such as design level, construction conditions, operation and maintenance environment, and service life, some of the older concrete T-beams in my country have developed problems such as cracks, corrosion, and aging, and their strength or stiffness can no longer meet transportation requirements, necessitating replacement. Therefore, there is an urgent need to research bridge erection and beam replacement construction technologies and complete sets of construction equipment under operating conditions. In this context, the integrated bridge erection and beam replacement machine has emerged.

[0003] The existing methods for replacing railway bridge beams in my country mainly include the lateral movement method, gantry crane method, truck crane method, and bridge erecting machine method. These methods require closing the track and interrupting train operation, and are heavily dependent on site conditions. Considering factors such as the construction environment and timeframe, existing beam replacement equipment and technologies are insufficient to meet on-site construction needs. Minimizing the impact on railway operations and ensuring the safety, reliability, and speed of beam replacement construction necessitates research into replacement and transport construction technologies and complete sets of construction equipment under operational conditions. However, currently, there is no dedicated beam replacement machine in this field capable of replacing simply supported T-beams of railways during operational windows.

[0004] Meanwhile, the existing beam replacement machine has a high manufacturing cost, but because the beam replacement operation is not a centralized or continuous operation, it has a long idle time, resulting in a large waste of resources. If the beam replacement machine can be used as a bridge erecting machine when it is idle, it is expected to generate greater economic benefits by using one machine for two purposes. Utility Model Content

[0005] To address the deficiencies of traditional beam replacement devices, the present utility model provides a bridge erection and beam replacement integrated machine that can not only demolish and replace damaged and aged simply supported T-shaped railway beams under railway operation conditions but also accommodate the beam erection of bridge erection machines. When performing beam replacement operations, it adopts the methods of integral demolition, integral installation, and self-propulsion, enabling rapid transportation and rapid construction on existing lines, and having the advantages of simple structure, convenient operation, and short beam replacement construction cycle.

[0006] The technical solutions adopted to achieve the above objectives of the present utility model are as follows:

[0007] A bridge erection and beam replacement integrated machine at least includes a main beam, a power system, an electro-hydraulic control system, and a driver's cab installed on the main beam. There are two lifting trolleys moving along the main beam on the main beam, and the main beam is further provided with:

[0008] A rear main leg, connected to the front and rear sections of the main beam. The overall structure of the rear main leg is in a "mouth" shape, including two first C-shaped legs and two first main beam connection seats. The two first main beam connection seats are fixed on the two side surfaces of the upper part of the main beam, and the tops of the two first C-shaped legs are respectively hinged to the two first main beam connection seats, and the two first C-shaped legs can be horizontally rotated to fold with the main beam under the drive of a folding mechanism; telescopic columns are provided in both of the two first C-shaped legs.

[0009] A front main leg or a bridge erection leg, connected to the front section of the main beam. The structure of the front main leg is the same as that of the rear main leg; the bridge erection leg is suspended on the main beam through a hanging wheel set and moves along the main beam under the drive of a transporter.

[0010] Running wheel sets, installed under the front main leg and the rear main leg for driving the whole machine to run.

[0011] Auxiliary legs, one or two are provided, connected to the front end or the front and rear ends of the main beam. The auxiliary legs are provided with a flipping mechanism for controlling the overall vertical flipping of the auxiliary legs to be parallel to the main beam, and a lifting mechanism for controlling the overall up and down lifting of the auxiliary legs; when one auxiliary leg is provided, a heightening column and a bracket are connected and arranged under the auxiliary leg.

[0012] Furthermore, the main beam adopts a single main beam box structure. The single main beam is divided into 4 segments or 5 segments, and each segment is a welded box structure. The segments are connected by high-strength bolts; on the side of the lower cover plate of the main beam, there is a track for the lifting trolley to move, and above the ear beam of the main beam, there is a track for the lifting trolley to move for the bridge erection leg.

[0013] Furthermore, the running wheel sets include a running frame and running wheels. The left and right sides of the running frame are respectively hinged to the bottoms of the two first C-shaped legs, and the running wheels are installed under the running frame.

[0014] Furthermore, the bridge support leg includes a roller assembly, a transfer device, an upper connecting crossbeam, a lower connecting crossbeam, a lower pad beam, and two second C-shaped legs, the second C-shaped legs having the same structure as the first C-shaped legs; the roller assembly is suspended on the main beam, the upper connecting crossbeam is fixed below the roller assembly, the transfer device is connected between the upper connecting crossbeam and the main beam, the top and bottom of the two second C-shaped legs are hinged to the upper connecting crossbeam and the lower connecting crossbeam respectively, and the lower pad beam is fixed to the bottom of the two second C-shaped legs.

[0015] Furthermore, the first C-shaped leg includes an upper crossbeam, a telescopic column, and a lower crossbeam. The upper crossbeam is hinged to the first main beam connecting seat or the upper connecting crossbeam via a vertical pin. The telescopic column is connected between the upper crossbeam and the lower crossbeam, and includes an outer column and an inner column, with a telescopic cylinder installed between them. The lower crossbeam is hinged to the traveling frame or the lower connecting crossbeam via a vertical pin.

[0016] Furthermore, the folding mechanism includes a folding cylinder, one end of which is mounted on the upper crossbeam and the other end is mounted on the first main beam connecting seat or the upper connecting crossbeam.

[0017] Furthermore, the inner column is evenly provided with pin holes from top to bottom, and the bottom of the outer column is also provided with corresponding pin holes, with pins installed in the pin holes.

[0018] Furthermore, the auxiliary support leg consists of two single legs, which are fixed to the left and right sides of the main beam respectively. Each single leg includes a second main beam connecting seat, a lifting column, and a support seat. The second main beam connecting seat is fixed to the upper side of the main beam by bolts. The top of the lifting column is hinged to the second main beam connecting seat by a horizontal pin, and the bottom of the lifting column is connected and fixed to the support seat.

[0019] Furthermore, the lifting mechanism includes a lifting cylinder, with both ends of the lifting cylinder connected to the inside of the lifting column, and the lifting of the support leg is controlled by the lifting cylinder.

[0020] Furthermore, the flipping mechanism includes an upper flipping seat, a lower flipping seat, and a flipping cylinder. The upper flipping seat is fixedly connected to the second main beam connecting seat, the lower flipping seat is fixedly connected to the lifting column, and the top end of the flipping cylinder is hinged to the upper flipping seat and the bottom end is hinged to the lower flipping seat.

[0021] This utility model has the following advantages over the prior art:

[0022] 1. The bridge erection and beam replacement integrated machine provided by this utility model uses a self-propelled method to travel from the beam yard along the existing railway track to the beam segment to be replaced during beam replacement operations. After the beam replacement is completed, it returns to the beam yard or the next construction site by self-propelled means. During the travel and transportation process, the whole machine is in a low position, and during the beam replacement process, the whole machine is in a high position. The switching between the travel mode and the beam replacement mode can be achieved by a simple high / low position switch (achieved by the extension and retraction of the main support legs), thus resulting in high construction efficiency.

[0023] 2. The bridge erection and beam replacement integrated machine provided by this utility model has a "U"-shaped overall structure for the bridge erection legs, front main legs, and rear main legs, which are relatively wide. If there is a need to pass through a tunnel, the two first / second C-shaped legs can be folded inward using a folding mechanism to make them parallel to the main beam. By folding, the width of the bridge erection legs, front main legs, and rear main legs can be greatly reduced, thereby allowing the bridge erection and beam replacement integrated machine to pass through the tunnel smoothly.

[0024] 3. This utility model is equipped with a rotatable auxiliary support leg. In the beam replacement operation, the main function of the auxiliary support leg is to support the entire beam replacement machine during the extension and retraction of the main support leg (i.e., high / low position switching) and during the folding of the main support leg; in the bridge erection operation, it is used to support the entire machine at the front end and assist the entire machine in passing through the hole.

[0025] 4. In summary, the integrated bridge erection and beam replacement machine provided by this utility model can both dismantle and replace damaged and aging simply supported railway T-beams under railway operation conditions, and also perform bridge erection and beam installation. Only a very small number of parts need to be replaced for beam replacement and bridge erection operations, and the switching between different operating conditions is convenient and quick. Therefore, it can achieve dual-purpose functionality, significantly reducing the cost of purchasing separate bridge erection and beam replacement machines, and improving utilization. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure of the integrated bridge erection and beam replacement machine in both beam replacement and bridge erection modes.

[0027] Figure 2 This is a schematic diagram of the overall structure of the bridge erection and beam replacement integrated machine in beam replacement mode (traveling state);

[0028] Figure 3 This is a schematic diagram of the overall structure of the bridge erection and beam replacement integrated machine in beam replacement mode (tunnel crossing state);

[0029] Figure 4 This is a side view of the overall structure of the bridge erection and beam replacement integrated machine in beam replacement mode (beam replacement state);

[0030] Figure 5 This is a side view of the overall structure (traveling state) of the integrated bridge erection and beam replacement machine in beam replacement mode;

[0031] Figure 6 This is a side view of the overall structure of the bridge erection and beam replacement machine in beam replacement mode (tunnel crossing state);

[0032] Figure 7 A schematic diagram of the overall structure of the rear main support leg of the bridge erection and beam replacement machine in beam replacement mode (beam replacement state);

[0033] Figure 8 A schematic diagram of the overall structure of the rear main support leg of the bridge erection and beam replacement machine in beam replacement mode (tunnel crossing state);

[0034] Figure 9 A schematic diagram of the overall structure of the auxiliary support leg in the support state of the bridge erection and beam replacement integrated machine in beam replacement mode;

[0035] Figure 10 A side view of the overall structure of the auxiliary support leg in the support state during the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0036] Figure 11 This is a schematic diagram of the overall structure of the crane trolley;

[0037] Figure 12 Flowchart of beam replacement construction steps S1 in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0038] Figure 13 S2 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0039] Figure 14 S3 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0040] Figure 15 S4 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0041] Figure 16 S5 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0042] Figure 17 S6 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0043] Figure 18 S7 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0044] Figure 19 S8 flowchart of beam replacement construction steps in the beam replacement mode of the integrated bridge erection and beam replacement machine;

[0045] Figure 20 A schematic diagram of the overall structure of the integrated bridge erection and beam replacement machine in bridge erection mode;

[0046] Figure 21A schematic diagram of the overall structure of the bridge erection leg for the integrated bridge erection and beam replacement machine in bridge erection mode;

[0047] Figure 22 Side view of the overall structure of the bridge erection leg of the integrated bridge erection and beam replacement machine in bridge erection mode;

[0048] Figure 23 Side view of the overall structure of the auxiliary leg of the integrated bridge erection and beam replacement machine in bridge erection mode;

[0049] Figure 24 Flowchart of bridge erection steps S1 for bridge erection and girder replacement integrated machine in bridge erection mode;

[0050] Figure 25 S2 flowchart of bridge erection construction steps in bridge erection mode of integrated bridge erection and beam replacement machine;

[0051] Figure 26 S3 flowchart of bridge erection construction steps in bridge erection mode of integrated bridge erection and beam replacement machine;

[0052] Figure 27 S4 flowchart of bridge erection construction steps in bridge erection mode of integrated bridge erection and beam replacement machine;

[0053] Figure 28 Flowchart of S1 for the construction steps of the bridge erection and beam replacement integrated machine in bridge erection mode;

[0054] Figure 29 S2 flowchart of the cross-hole construction steps in the bridge erection mode of the integrated bridge erection and beam replacement machine;

[0055] Figure 30 S3 flowchart of the cross-hole construction steps in the bridge erection mode of the integrated bridge erection and beam replacement machine;

[0056] Figure 31 S4 flowchart for the construction steps of the bridge erection and beam replacement integrated machine in bridge erection mode;

[0057] In the diagram: 1-Main beam, 11-Lower cover plate, 12-Side web plate, 13-Ear beam, 2-Lifting trolley, 21-Winding mechanism, 22-Wire rope, 23-Lifting device, 3-Rear main outrigger, 31-First main beam connecting seat, 32-Upper crossbeam, 33-Telescopic column, 331-Outer column, 332-Inner column, 333-Telescopic cylinder, 334-Pin hole, 335-Pin, 34-Lower crossbeam, 35-Vertical pin shaft, 4-Traveling wheel set, 41-Traveling wheel Frame, 42-Traveling wheel, 5-Auxiliary support leg, 51-Second main beam connecting seat, 52-Lifting column, 53-Support seat, 54-Horizontal pin, 55-Lifting cylinder, 56-Upper tilting seat, 57-Lower tilting seat, 58-Tilting cylinder, 59-Heightened column, 510-Corner, 6-Beam transport vehicle, 7-Simply supported T-beam, 8-Bridge erection support leg, 81-Hanging wheel assembly, 82-Transfer device, 83-Upper connecting crossbeam, 84-Lower connecting crossbeam, 85-Lower pad beam. Detailed Implementation

[0058] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0059] Example 1

[0060] The bridge erection and beam replacement integrated machine provided in this embodiment is a beam replacement mode, and its overall structure is as follows: Figure 1 Middle left image Figure 2 and Figure 3 As shown, Figure 1 Middle left image Figure 2 and Figure 3 These correspond to the beam replacement state, the traveling state, and the tunnel crossing state, respectively. Figure 2 and Figure 3 The auxiliary outriggers are not shown in the diagram because they are in a flipped-over state.

[0061] Main beam 1 is the main load-bearing structure of the beam replacement machine, refer to Figure 1 as well as Figure 10 The main beam 1 adopts a single main beam box structure, with each main beam divided into 4 segments. Each segment is a welded box structure, and the segments are connected by 10.9 grade high-strength bolts. The two segments at the beginning and end have an upward pre-arch, while the two middle segments do not. The side of the lower cover plate 11 of the main beam 1 is provided with a track for the crane trolley 2 to run on, and a track for the crane trolley 2 to run on is also provided above the side ear beams 13 of the side web plate 12 of the main beam 1. The main beam 1 is also equipped with a power system, an electro-hydraulic control system, and a driver's cab. The above modules are conventional designs in this field and will not be described in detail in this embodiment, nor are they shown in the accompanying drawings.

[0062] There are two crane trolleys, one at the front and one at the rear, and their structure is as follows: Figure 4 as well as Figure 11The lifting trolley 2 is mounted on the main beam 1 and moves along the main beam. The lifting trolley 2 adopts a suspended structure, and is entirely suspended on the ear beam 13 at the lower part of the main beam. The lifting trolley 2 is located at the lower part of the main beam 1, and the top height of the lifting trolley 2 is lower than the height of the auxiliary outrigger 5 after it is flipped. Two winch mechanisms 21 are installed on the lifting trolley 2. The two winch mechanisms 21 are symmetrically distributed on the left and right sides of the main beam 1. The wire ropes 22 of the two winch mechanisms 21 are connected to a lifting device 23 by a balanced winding and rope threading method.

[0063] When the bridge erecting machine is in operation, two lifting trolleys work together to lift a T-beam, with a total of four lifting points on the two trolleys. The winch mechanisms 21 on both the front and rear lifting trolleys are balanced lifting point mechanisms, using a balanced winding rope method: the two ends of a steel wire rope come out from both sides of the double drum, enter their respective moving pulley groups and fixed pulley groups, and are then wound together through the left and right balanced pulley groups, so that the forces on the left and right pulley groups are balanced, forming a balanced lifting point; the symmetrical sides of the lifting trolleys have the same arrangement and winding method. Due to the use of the same structure and the addition of a frequency converter, the steel wire rope on the same lifting trolley is ensured to descend or rise synchronously, thereby ensuring the balanced lifting and lowering of the lifting device; the winch mechanism 21 is driven by a motor to drive the coupling, gearbox, and built-in planetary gear reducer, which drives the drum with the steel wire rope wound on it. By controlling the forward and reverse rotation of the motor, the lifting and lowering of the T-beam can be achieved. Figure 11 The image shows a front view of the hoisting mechanism. The drums in the hoisting mechanism have spiral grooves for regularly arranged ropes. The rope grooves on the drums of the two hoisting trolleys are manufactured and installed symmetrically, and the rope grooves on both sides of the same double drum are also symmetrical. Each double drum has a rope capacity of 142 meters, and there are four drums in total.

[0064] The structure of the rear main outrigger 3 is referenced. Figure 1 , Figure 4 as well as Figure 7 and Figure 8The front main support leg has the same structure as the rear main support leg, and is connected to the front and rear sections of the main beam 1 respectively. The rear main support leg 3 has an overall "U" shape, including two first C-shaped legs and two first main beam connecting seats. The two first main beam connecting seats are fixed to the two sides of the upper part of the main beam by bolts. The tops of the two first C-shaped legs are respectively hinged to the two first main beam connecting seats, and the two first C-shaped legs can be rotated horizontally to fold with the main beam under the drive of the folding mechanism. Each of the two first C-shaped legs is equipped with a telescopic column 33. The first C-shaped leg includes a first main beam connecting seat 31, an upper crossbeam 32, a telescopic column 33, and a lower crossbeam 34. The first main beam connecting seat 31 is fixed to the upper side of the main beam with bolts. The upper crossbeam 32 is hinged to the first main beam connecting seat 31 via a vertical pin 35. The telescopic column 33 connects the upper crossbeam 32 and the lower crossbeam 34. The telescopic column 33 includes an outer column 331 and an inner column 332, and a telescopic cylinder 333 is installed between the two. The lower crossbeam 34 is hinged to the traveling frame 41 via a vertical pin 35. The folding mechanism includes a folding cylinder (not shown in the figure), which is installed between the upper crossbeam 32 and the first crossbeam connecting seat 31. The inner column 332 is evenly provided with pin holes 334 from top to bottom, and the bottom of the outer column 331 is also provided with corresponding pin holes 334. A pin 335 is provided in the pin holes 334. The inner column 332 extends and retracts inside the outer column 331 and is locked / unlocked by the pin 335. When the main support leg needs to be extended and retracted to adjust its height, the pin is pulled out, and the extension cylinder drives the main support leg to extend and retract. After the height adjustment is completed, the pin is immediately inserted to lock the inner column and the outer column.

[0065] The structure of the running wheel set 4 is referenced. Figure 4 and Figure 7 As shown, there are also two sets of traveling wheels 4. The traveling wheel set 4 includes a traveling frame 41 and traveling wheels 42. The left and right sides of the traveling frame 41 are respectively hinged to the bottom of the two first C-shaped legs. The traveling wheels 42 are installed below the traveling frame 41. The traveling wheel set 4 is used to drive the entire beam changing machine to travel.

[0066] Structural reference of auxiliary outrigger 5 Figure 1 , Figure 9 and Figure 10As shown, there are two in total, which are respectively connected to the front and rear sections of the main beam and are located outside the two main legs 3. The auxiliary leg 5 is provided with a flipping mechanism for controlling the overall vertical flipping of the auxiliary leg to be parallel to the main beam, and a lifting mechanism for controlling the overall up and down lifting of the auxiliary leg. The auxiliary leg 5 is composed of two single legs, and the two single legs are respectively fixed on the left and right sides of the main beam 1. The single leg includes a second main beam connecting seat 51, a lifting column 52 and a support seat 53. The second main beam connecting seat 51 is fixed on the side of the upper part of the main beam by bolts. The top end of the lifting column 52 is hinged to the second main beam connecting seat 51 through a horizontal pin shaft 54, and the bottom end of the lifting column 52 is fixedly connected to the support seat 53. The lifting mechanism includes a lifting oil cylinder 55. The two ends of the lifting oil cylinder 55 are respectively connected inside the lifting column 52, and the overall lifting of the auxiliary leg 5 is controlled by the lifting of the lifting oil cylinder 55. The flipping mechanism includes an upper flipping seat 56, a lower flipping seat 57 and a flipping oil cylinder 58. The upper flipping seat 56 is fixedly connected to the second main beam connecting seat 51, the lower flipping seat 57 is fixedly connected to the lifting column 52, and the two ends of the flipping oil cylinder 58 are respectively hinged to the upper flipping seat 56 and the lower flipping seat 57.

[0067] The working steps of the bridge erecting and beam changing machine provided in this embodiment include three parts: traveling, passing through the tunnel and beam changing:

[0068] Traveling of the beam changing machine: In the actual construction process of the beam changing machine in this embodiment, the whole machine travels from the beam yard along the existing railway track to the beam section to be replaced by means of self-propulsion, and returns to the beam yard by means of self-propulsion after the beam changing is completed. During the traveling and transportation process, the whole machine is in a low position, and during the beam changing process, the whole machine is in a high position. The switching between the traveling condition and the beam changing condition can be realized by the high / low position switching, which is achieved by the telescoping of the main legs. Figure 2 and Figure 5 is the structural schematic diagram of the beam changing machine in the traveling state. As can be seen from the figure, Figure 2 and Figure 5 the telescoping columns in the main legs have been in a fully retracted state, and its overall height has dropped to the lowest. During the telescoping process of the main legs (i.e., the high / low position switching), the whole beam changing machine is supported by the auxiliary legs; during the self-propulsion process of the beam changing machine, the auxiliary legs are in an overall flipped state.

[0069] Passing through the tunnel by the beam changing machine: The overall shape of the main legs in this embodiment is "square", and its internal width is greater than the width of a single-section simply supported T-shaped railway beam. Therefore, the width of the main legs is relatively large, as Figure 4 shown; if there is a tunnel in the section between the beam yard and the construction site, since the width of the main legs is greater than the width of the tunnel, it is necessary to use the folding mechanism to fold the two first C-shaped legs inward to make them parallel to the main beam. By folding, the width of the main legs can be greatly reduced, so that the whole beam changing machine can pass through the tunnel smoothly. Figure 3 and Figure 6 This diagram illustrates the main outriggers folded during tunnel passage. As can be seen, the two first C-shaped legs are folded horizontally at a 90-degree angle, significantly reducing the width of the main outriggers and allowing for smooth passage through the tunnel. During the folding process, auxiliary outriggers support the entire beam-changing machine. As the machine travels through the tunnel after folding, the auxiliary outriggers are in a flipped-over state.

[0070] Beam replacement machine beam replacement: The beam replacement process requires the cooperation of two beam transport vehicles 6, one to transport the old simply supported T-beams 7 that have been removed, and the other to transport the new simply supported T-beams 7 from the beam yard to the construction site. After the beam replacement machine finishes its low-position travel, when switching to the beam replacement state, the main support leg needs to be extended. At this time, the auxiliary support leg supports the entire beam replacement machine, lifting the main support leg off the ground. Then, the pin on the telescopic column is pulled out, and the telescopic cylinder drives the main support leg to extend. After the height adjustment is completed, the pin is immediately inserted to lock the inner and outer columns. Then, the auxiliary support leg is rotated as a whole until the entire beam replacement construction process is completed. The beam replacement construction steps are as follows: Figures 12-19 As shown (the auxiliary support leg is in a flipped state and is not shown in the figure), the details are as follows:

[0071] (S1) Lifting T-beams by front and rear crane trolleys: The front and rear crane trolleys lift the beams synchronously. When the beam is about to be in place, attention should be paid to the distance between the beam end and the beam transport vehicle (the feeding speed should be reduced when the beam is about 1m away from the end of the beam transport vehicle).

[0072] (S2) Beam-carrying trolley connection: The beam-carrying trolley drives into the bottom of the simply supported T-beam, the center of the platform is 1.3m away from the beam end, the lifting cylinder descends to the lowest position, so that the beam is placed on the beam-carrying trolley, and the beam lifting operation is completed.

[0073] (S3) The beam-carrying trolley and the rear crane trolley connect the beam synchronously: The rear crane trolley and the beam-carrying trolley connect the beam synchronously. When the beam connection is about to be completed, the trolley should run at low speed.

[0074] (S4) Synchronous beam movement of front and rear beam-carrying trolleys: After the front and rear beam-carrying trolleys move the beams to their positions, the beam transport vehicle carries the dismantled simply supported T-beams back to the storage location.

[0075] (S5) Lifting the front trolley beam: When lifting the beam, ensure that the distance between the first end of the lifting beam and the center of the rear main support leg is less than 3.5m, and the distance between the centers of the front and rear trolleys is about 3.5m.

[0076] (S6) Rear crane trolley lifting beam: After the rear crane trolley lifts the beam, disconnect the control connection line between the beam transport vehicle and the bridge erecting machine. (S7) Synchronous beam feeding: The front and rear crane trolleys lift the beam synchronously. During the beam lifting process, the running speed of the front and rear crane trolleys is kept consistent. After the front crane trolley approaches the position to be erected, the speed is reduced.

[0077] (S8) Lowering the beam: When lowering the beam, attention should be paid to the gap between the front and rear ends of the simply supported T-beam and the front main support leg and the already erected beam; at the same time, attention should be paid to the levelness of the four corners of the simply supported T-beam, and the longitudinal and transverse deviation of the beam should not exceed 10‰.

[0078] After the beam is lowered, the beam replacement machine completes the entire beam replacement operation and switches to a low-position traveling state with the support of auxiliary outriggers. Then, the beam replacement machine travels back to the beam yard or the next beam replacement site. At the same time, the construction personnel install and debug the track and electrical equipment on the newly replaced simply supported T-beam in order to restore the railway line to normal operation as soon as possible.

[0079] Example 2

[0080] The bridge erection and beam replacement integrated machine provided in this embodiment is a bridge erection mode, and its overall structure is as follows: Figure 20 As shown, the main difference between the bridge erection mode and the girder replacement mode is that the front main support leg is replaced with a bridge erection support leg, and then only one auxiliary support leg is set at the front end of the main girder. A lower heightening column and corbel are added below the auxiliary support leg, and the main girder is increased from 4 segments to 5 segments. Apart from the above differences, the remaining components in the bridge erection mode are the same as those in the girder replacement mode.

[0081] In this embodiment, when describing the overall structure of the machine in the bridging mode, only the differences mentioned above will be described in detail with reference to the accompanying drawings. Components with the same structure will not be described again.

[0082] The most significant change between the bridge erection mode and the beam replacement mode lies in the bridge erection leg 8. The structure of the bridge erection leg is as follows: Figure 21 and Figure 22 As shown, the bridge support leg includes a roller assembly 81, a transfer device 82, an upper connecting crossbeam 83, a lower connecting crossbeam 84, a lower pad beam 85, and two second C-shaped legs. The roller assembly 81 is suspended on the main beam 1, the upper connecting crossbeam 83 is fixed below the roller assembly 81, the transfer device 82 is connected between the upper connecting crossbeam and the main beam, the top and bottom of the two second C-shaped legs are hinged to the upper connecting crossbeam and the lower connecting crossbeam respectively, and the lower pad beam 85 is fixed to the bottom of the two second C-shaped legs. The bridge support leg moves along the main beam under the driving action of the transfer device. The second C-shaped leg includes an upper crossbeam, a telescopic column, and a lower crossbeam. The upper crossbeam is hinged to the upper connecting crossbeam via a vertical pin, the telescopic column is connected between the upper and lower crossbeams, and the telescopic column includes an outer column and an inner column, with a telescopic cylinder installed between them; the lower crossbeam is hinged to the lower connecting crossbeam via a vertical pin.

[0083] During bridge construction, only one auxiliary leg is installed, connected to the front end of the main beam, and its structure is as follows: Figure 23 As shown, a heightening column 59 and a corbel 510 are connected and installed below the two single legs of the auxiliary support leg.

[0084] The bridge erection and beam replacement integrated machine provided in this embodiment has the following bridge erection construction process under bridge erection conditions: Figures 24-27 As shown:

[0085] The S1 beam transport vehicle feeds the beam to the tail of the bridge erecting machine, and the front crane trolley lifts the front end of the T-beam.

[0086] The front lifting trolley and the rear beam transport vehicle of S2 work together to lift and feed the beam to the beam pick-up position of the rear lifting trolley;

[0087] S3 front and rear crane trolleys lift and feed the box girder into place;

[0088] The S4 front and rear crane trolleys were lowered into place, and the beam erection was completed.

[0089] The bridge erection and beam replacement integrated machine provided in this embodiment has the following bridge erection construction process under bridge erection conditions: Figures 28-31 As shown:

[0090] S1 front and rear lifting trolleys move to the rear counterweight;

[0091] The S2 bridge erecting machine's rear main support leg and bridge erecting support leg work together to drive the bridge erecting machine forward (during the forward movement, the rear main support leg moves with the main beam, while the bridge erecting support leg remains stationary), so that the auxiliary support leg reaches above the pier in front.

[0092] S3 supports the auxiliary outrigger, and then the bridge-building outrigger moves forward to the pier in front and provides support;

[0093] S4 rear main support leg and bridge erecting support leg drive the bridge erecting machine forward to the beam erection state (during the forward movement, the rear main support leg moves with the main beam, while the bridge erecting support leg remains stationary), and the span is completed.

Claims

1. A bridge erection and girder replacement integrated machine, comprising at least a main girder and a power system, an electro-hydraulic control system, and a driver's cab mounted on the main girder, wherein two lifting trolleys that move along the main girder are provided on the main girder, characterized in that: The main beam is also equipped with: The rear main support leg is connected to the front and rear sections of the main beam. The overall structure of the rear main support leg is "U" shaped, including two first C-shaped legs and two first main beam connecting seats. The two first main beam connecting seats are fixed to the two sides of the upper part of the main beam. The tops of the two first C-shaped legs are respectively hinged to the two first main beam connecting seats, and the two first C-shaped legs can be rotated horizontally to fold with the main beam under the drive of the folding mechanism. Each of the two first C-shaped legs is provided with a telescopic column. The front main support leg or bridge support leg is connected to the front section of the main beam. The structure of the front main support leg is the same as that of the rear main support leg. The bridge support leg is suspended on the main beam by a set of hanging wheels and moves along the main beam under the drive of the transfer device. The traveling wheel set is installed below the front and rear main outriggers to drive the entire machine to travel; One or two auxiliary support legs are provided and connected to the front end or the front and rear ends of the main beam. The auxiliary support leg is equipped with a flipping mechanism for controlling the vertical flipping of the entire auxiliary support leg to be parallel to the main beam, and a lifting mechanism for controlling the vertical lifting of the entire auxiliary support leg. When there is one auxiliary support leg, a heightening column and a corbel are connected and installed below the auxiliary support leg.

2. The integrated bridge erection and beam replacement machine according to claim 1, characterized in that: The main beam adopts a single main beam box structure. Each main beam is divided into 4 or 5 segments, each segment is a welded box structure, and the segments are connected by high-strength bolts. The side of the lower cover plate of the main beam is provided with a track for the crane trolley to move, and the upper part of the ear beam of the main beam is provided with a track bridge support leg for the crane trolley to move.

3. The integrated bridge erection and beam replacement machine according to claim 1, characterized in that: The running wheel assembly includes a running frame and running wheels. The left and right sides of the running frame are respectively hinged to the bottom of the two first C-shaped legs, and the running wheels are installed under the running frame.

4. The integrated bridge erection and beam replacement machine according to claim 1, characterized in that: The bridge support leg includes a roller assembly, a transfer device, an upper connecting crossbeam, a lower connecting crossbeam, a lower pad beam, and two second C-shaped legs. The second C-shaped legs have the same structure as the first C-shaped legs. The roller assembly is suspended on the main beam, the upper connecting crossbeam is fixed below the roller assembly, the transfer device is connected between the upper connecting crossbeam and the main beam, the top and bottom of the two second C-shaped legs are hinged to the upper connecting crossbeam and the lower connecting crossbeam, respectively, and the lower pad beam is fixed to the bottom of the two second C-shaped legs.

5. The integrated bridge erection and beam replacement machine according to claim 4, characterized in that: The first C-type leg includes an upper crossbeam, a telescopic column, and a lower crossbeam. The upper crossbeam is hinged to the first main beam connecting seat or the upper connecting crossbeam via a vertical pin. The telescopic column is connected between the upper crossbeam and the lower crossbeam. The telescopic column includes an outer column and an inner column, and a telescopic cylinder is installed between the two. The lower crossbeam is hinged to the traveling wheel assembly or the lower connecting crossbeam via a vertical pin.

6. The integrated bridge erection and beam replacement machine according to claim 5, characterized in that: The folding mechanism includes a folding cylinder, one end of which is mounted on the upper crossbeam and the other end is mounted on the first main beam connecting seat or the upper connecting crossbeam.

7. The integrated bridge erection and beam replacement machine according to claim 5, characterized in that: The inner column is evenly provided with pin holes from top to bottom, and the bottom of the outer column is also provided with corresponding pin holes, with pins installed in the pin holes.

8. The integrated bridge erection and beam replacement machine according to claim 1, characterized in that: The auxiliary support leg consists of two single legs, which are fixed to the left and right sides of the main beam respectively. Each single leg includes a second main beam connecting seat, a lifting column, and a support seat. The second main beam connecting seat is fixed to the upper side of the main beam by bolts. The top of the lifting column is hinged to the second main beam connecting seat by a horizontal pin, and the bottom of the lifting column is connected and fixed to the support seat.

9. The integrated bridge erection and beam replacement machine according to claim 8, characterized in that: The lifting mechanism includes a lifting cylinder, with both ends of the lifting cylinder connected to the inside of the lifting column. The lifting and lowering of the support leg is controlled by the lifting and lowering of the lifting cylinder.

10. The integrated bridge erection and beam replacement machine according to claim 8, characterized in that: The flipping mechanism includes an upper flipping seat, a lower flipping seat, and a flipping cylinder. The upper flipping seat is fixedly connected to the second main beam connecting seat, and the lower flipping seat is fixedly connected to the lifting column. The top end of the flipping cylinder is hinged to the upper flipping seat, and the bottom end is hinged to the lower flipping seat.

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