Railway steel bridge rapid beam changing unit device and system

Abstract

The invention discloses a railway steel bridge rapid beam changing unit device and system, and relates to the field of bridge construction. The rapid beam changing unit device for the railway steel bridge comprises a machine arm, two crane carriages and two stand columns, wherein the two crane carriages can be movably connected to the bottom of the machine arm in the length direction of the machine arm, and the two stand columns are connected to the two ends of the machine arm respectively. The crane carriages are used for hoisting bridge pieces. Each stand column comprises a cross beam outer sleeve, two cross beam inner sleeves inserted into the two ends of the cross beam outer sleeve in a sliding mode and two transverse supporting legs capable of being lifted and connected to the two cross beam inner sleeves in the mode of rotating around the vertical axis, and the cross beam outer sleeves can penetrate through the machine arms in the mode of rotating around the vertical axis and are connected to the machine arms. According to the rapid beam changing unit device and system for the railway steel bridge, a railway flatcar can be used for transporting the rapid beam changing unit device for the railway steel bridge to hoist beam pieces to move to a construction site for installation construction, and therefore new beam transporting and erecting and old beam dismantling and recycling operation are achieved; the method has the advantages of being high in construction efficiency, free of auxiliary equipment and suitable for construction of special sections such as canyons and rivers.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and more specifically, to a rapid beam replacement unit and system for railway steel bridges. Background Technology

[0002] In recent years, with the rapid development of steel structure bridge construction, in-service bridges have also begun to suffer from defects such as coating deterioration, steel plate corrosion, and weld cracking, leading to reduced durability, shortened service life, and excessively high maintenance costs. This is because steel structures suffer from corrosion, which reduces the net cross-sectional area and increases the corresponding stress, thereby reducing the load-bearing capacity of the steel beams. In severe cases, it can even lead to component fracture, affecting the structural safety and service life of the bridge. Therefore, strengthening the maintenance and management of bridges during their operation has become an urgent problem to be solved for steel structure bridges.

[0003] Currently, steel bridge replacement mainly involves using cranes such as truck cranes to remove the old beams and install the new ones. However, since railway steel beams often weigh over 100 tons, two large-tonnage truck cranes are needed, resulting in high costs. Furthermore, this method of beam replacement is inefficient, requiring prolonged track closures, while the maintenance windows provided by operating lines are short and cannot meet the construction requirements of those lines. Transporting new beams and removing old beams requires customized vehicles and demanding road conditions, necessitating paved roads, which increases both time and cost. When the bridge to be replaced is located in canyons, rivers, or other areas inaccessible to truck cranes, steel bridge replacement cannot be carried out.

[0004] Therefore, a rapid beam replacement unit and system for railway steel bridges is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a rapid beam replacement unit and system for railway steel bridges, which can realize the transportation and erection of new beams and the dismantling and recycling of old beams. It has the advantages of high construction efficiency, no need for auxiliary equipment, and adaptability to construction in special sections such as canyons and rivers.

[0006] This application is implemented as follows: This application provides a rapid beam replacement unit for railway steel bridges, comprising: machine arm; Two lifting trolleys are connected to the bottom of the boom and can move along the length of the boom. The lifting trolleys are used to lift bridge beams. Two uprights are connected to both ends of the boom. Each upright includes a crossbeam outer sleeve, two crossbeam inner sleeves that are slidably inserted into both ends of the crossbeam outer sleeve, and two horizontal support legs that are liftable and rotatable around the vertical axis and connected to the two crossbeam inner sleeves. The crossbeam outer sleeve can rotatably pass through and connect to the boom.

[0007] In some alternative implementations, the boom is connected to a central pin that slides through the outer sleeve of the crossbeam. The ends of the two inner sleeves of the crossbeam away from the outer sleeve are respectively connected to distribution crossbeams. The bottom of each distribution crossbeam is connected to at least one inner column. The bottom of each inner column is slidably inserted into an outer column. The outer columns located on the same side of the boom are connected by a cylinder seat. The cylinder seat is connected to a lifting cylinder. The cylinder rod of the lifting cylinder is hinged to the corresponding side distribution crossbeam. The two horizontal support legs are rotatably connected to the two corresponding outer columns about the vertical axis.

[0008] In some optional implementations, the bottom of each inner column is slidably inserted into an intermediate column, and the bottom of each intermediate column is slidably inserted into an outer column. The inner column, intermediate column, and outer column are each provided with at least two connecting holes spaced apart along the height direction. The inner column and the corresponding intermediate column, and the intermediate column and the corresponding outer column are respectively connected by at least one connecting pin passing through the two corresponding connecting holes.

[0009] In some alternative embodiments, the cylinder seat is provided with at least one lifting groove extending in the height direction, and a cylinder slide shoe is provided in the lifting groove. The lifting cylinder is connected to the cylinder slide shoe. Each lifting groove is provided with at least two fixing holes arranged at intervals in the height direction. The cylinder slide shoe is connected with fixing pins that correspond one-to-one with each lifting groove. When the cylinder slide shoe is raised or lowered, each fixing pin is connected to a fixing hole to connect the cylinder slide shoe to the cylinder seat.

[0010] In some alternative embodiments, the two ends of the crossbeam sleeve are provided with at least one set of limiting holes arranged at intervals along its length, the two crossbeam inner sleeves are each provided with at least one locking hole corresponding to the limiting hole, and the crossbeam sleeve is connected with at least one locking bolt that passes through the limiting hole and the locking hole in sequence.

[0011] In some alternative implementations, the bottom of the boom is provided with ear beams on both sides, and the sides of the trolley are each connected to at least two rolling wheels that press against the top surface of the opposite ear beams.

[0012] This application also provides a railway steel bridge rapid beam replacement unit system, which includes at least five railway flatcars and at least two movable self-propelled transport railway flatcars connected in sequence, as well as the aforementioned railway steel bridge rapid beam replacement unit device. The two columns of the railway steel bridge rapid beam replacement unit device are respectively supported on the two railway flatcars.

[0013] In some alternative implementations, each of the two railway flatcars is equipped with a fixed frame, and the top of each fixed frame is connected to a slewing support that can rotate around a vertical axis. The top of each slewing support is connected to a slewing frame, and the boom of the railway steel bridge rapid beam replacement unit is supported on the two slewing frames at both ends.

[0014] In some alternative embodiments, the bottom of the rotary frame is connected to a circumferentially extending slide seat, the bottom of which is provided with a first polytetrafluoroethylene plate.

[0015] In some alternative embodiments, the top of the mounting bracket is provided with a second PTFE plate that slides in conjunction with the first PTFE plate.

[0016] The beneficial effects of this application are as follows: The railway steel bridge rapid girder replacement unit device provided by this application includes a boom, two lifting trolleys respectively movable along the length of the boom and connected to the bottom of the boom, and two columns respectively connected to both ends of the boom. The lifting trolleys are used to lift bridge girder segments. Each column includes a crossbeam outer sleeve, two crossbeam inner sleeves respectively slidably inserted at both ends of the crossbeam outer sleeve, and two horizontal support legs that are liftable and rotatable around a vertical axis and connected to the two crossbeam inner sleeves. The crossbeam outer sleeve can rotatably pass through and connect to the boom. The railway steel bridge rapid girder replacement unit device and system provided by this application can use railway flatcars to transport the railway steel bridge rapid girder replacement unit device to lift and move the girder segments to the construction site. After the two columns are moved and unfolded to the sides to support the boom, the lifting trolleys are used to lift the girder segments for construction, thereby realizing the transportation and erection of new beams and the dismantling and recycling of old beams. It has the advantages of high construction efficiency, no need for auxiliary equipment, and adaptability to special sections such as canyons and rivers. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the railway steel bridge rapid girder replacement unit system provided in this application, showing the movement of bridge girders on the railway. Figure 2 This is a schematic diagram of the structure of the railway flatcar transported in the railway steel bridge rapid beam replacement unit system provided in the embodiments of this application; Figure 3 A schematic diagram of the cross-section of the transport railway flatcar in the railway steel bridge rapid beam replacement unit system provided in this application embodiment; Figure 4 A partial cross-sectional view of the boom bogie in the railway steel bridge rapid beam replacement unit system provided in this application embodiment; Figure 5 A schematic diagram of the structure of the railway steel bridge rapid beam replacement unit in the railway steel bridge rapid beam replacement unit system provided in the embodiments of this application; Figure 6 A schematic cross-sectional view of the rapid beam replacement unit for railway steel bridges in the embodiment of this application; Figure 7 A schematic cross-sectional view of the rapid beam replacement unit for railway steel bridges in the embodiment of this application; Figure 8 A partial cross-sectional view of the column of the railway steel bridge rapid beam replacement unit in the railway steel bridge rapid beam replacement unit system provided in the embodiments of this application; Figure 9 This is a partial cross-sectional view of the column of the railway steel bridge rapid beam replacement unit in the railway steel bridge rapid beam replacement unit system provided in the embodiments of this application.

[0019] In the diagram: 100, boom; 110, trolley; 120, lug; 130, pulley; 200, column; 210, crossbeam outer sleeve; 220, crossbeam inner sleeve; 230, cross support leg; 240, center pin; 250, distribution crossbeam; 260, inner column; 261, connecting hole; 270, intermediate column; 280, outer column; 290, cylinder seat; 300, lifting cylinder; 310, connecting pin; 320, lifting groove; 330, cylinder slipper; 34 0. Fixing hole; 350. Fixing pin; 360. Limiting hole; 370. Locking hole; 380. Locking bolt; 400. Railway flatcar; 410. Transport railway flatcar; 411. Car body; 412. Track; 413. Cargo trolley; 414. Four-axle bogie; 415. Power system; 420. Fixing frame; 430. Slewing bearing; 440. Slewing frame; 450. Sliding seat; 460. First PTFE plate; 470. Second PTFE plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The features and performance of the railway steel bridge rapid beam replacement unit and system of this application are further described in detail below with reference to the embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown in the figure, this application provides a railway steel bridge rapid beam replacement unit system, which includes five railway flatcars 400 and two movable self-propelled transport railway flatcars 410 connected in sequence, as well as a railway steel bridge rapid beam replacement unit device; wherein, the second and fourth railway flatcars 400 are respectively equipped with boom bogies, each boom bogie including a fixed frame 420, a slewing support 430 rotatably connected to the top of the fixed frame 420 about a vertical axis, and a slewing frame 440 connected to the top of the slewing support 430. The boom 100 of the railway steel bridge rapid beam replacement unit device is supported on the two slewing frames 440 at both ends, and the bottom of each slewing frame 440 is connected to a circumferentially extending sliding seat 450. The bottom of the sliding seat 450 is provided with a first polytetrafluoroethylene plate 460, and the top of the fixed frame 420 is provided with a second polytetrafluoroethylene plate 470 that slides with the first polytetrafluoroethylene plate 460. The self-propelled transport railway flatcar 410 includes a car body 411, two parallel tracks 412 on the car body 411, and two trolleys 413. The two trolleys 413 can move along the two tracks 412 on the car body 411. Four-axle bogies 414 are connected to both ends of the bottom of the car body 411. A power system 415 for driving its movement is provided at the bottom of the car body 411.

[0029] The railway steel bridge rapid beam replacement unit includes a boom 100, two lifting trolleys 110 that are movable along the length of the boom 100 and connected to the bottom of the boom 100, and two columns 200 that are respectively connected to both ends of the boom 100. The bottom of the boom 100 is provided with ear beams 120 on both sides. The two sides of the lifting trolleys 110 are respectively connected with two rolling wheels 130 that roll against the top surface of the opposite ear beams 120. The lifting trolleys 110 are used to lift and transport bridge beams. Each column 200 includes a crossbeam sleeve 210 that slides through the arm 100, two crossbeam inner sleeves 220 that are respectively slidably inserted at both ends of the crossbeam sleeve 210, two distribution crossbeams 250, two inner columns 260, two intermediate columns 270, two outer columns 280, two cylinder seats 290, two lifting cylinders 300, and two horizontal support legs 230. The arm 100 is connected to a center pin 240 that slides through the crossbeam sleeve 210. The arm 100 has a through hole for the crossbeam sleeve 210 to pass through. The diameter of the through hole is larger than the cross-sectional dimension of the crossbeam sleeve 210 so that the crossbeam sleeve 210 can be rotated around the center pin 240. Axial rotation, the two ends of the crossbeam outer sleeve 210 are respectively provided with two sets of limiting holes 360 arranged at intervals along its length direction, each set including two limiting holes 360 arranged vertically at intervals, the two crossbeam inner sleeves 220 are respectively provided with two locking holes 370 arranged vertically at intervals, the two locking holes 370 of each crossbeam inner sleeve 220 correspond to one set of limiting holes 360 at one end of the crossbeam outer sleeve 210, and two locking bolts 380 are respectively connected to the two ends of the crossbeam outer sleeve 210. The two locking bolts 380 pass through one set of limiting holes 360 and two corresponding locking holes 370 in sequence to connect the crossbeam inner sleeve 220 to the crossbeam outer sleeve 210.

[0030] Two distribution beams 250 are respectively connected to the ends of the inner sleeves 220 away from the outer sleeves 210. Two inner columns 260 are connected to the bottom of each distribution beam 250. The bottom of each inner column 260 is slidably inserted into the top of an intermediate column 270, and the bottom of each intermediate column 270 is slidably inserted into the top of an outer column 280. Each inner column 260 has two connecting holes 261 spaced apart along the height direction, each intermediate column 270 has three connecting holes 261 spaced apart along the height direction, and each outer column 280 has four connecting holes 261 spaced apart along the height direction. Each inner column 260 and its corresponding intermediate column 270, and each intermediate column 270 and its corresponding outer column 280, is connected by a connecting pin 310 passing through two corresponding connecting holes 261. Two horizontal support legs 230 are rotatably connected to the bottoms of two outer columns 280 located on either side of the arm 100, about a vertical axis.

[0031] Two outer columns 280 located on the same side of the boom 100 are connected by a cylinder seat 290. The cylinder seat 290 is provided with two lifting grooves 320 extending along the height direction. The lifting grooves 320 are provided with cylinder slippers 330 that can slide along them. Two lifting cylinders 300 are respectively connected to two cylinder slippers 330. The cylinder rods of the two lifting cylinders 300 are respectively hinged to the corresponding side distribution beams 250. Each lifting groove 320 is provided with two fixing holes 340 arranged at intervals along the height direction. Each cylinder slipper 330 is connected to two fixing pins 350 that correspond one-to-one with each lifting groove 320. When the cylinder slipper 330 is raised or lowered, each fixing pin 350 is connected to a fixing hole 340 to connect the cylinder slipper 330 to the cylinder seat 290.

[0032] The railway steel bridge rapid girder replacement unit system provided in this application embodiment includes five railway flatcars 400 and two self-propelled transport railway flatcars 410 connected sequentially from front to back. The self-propelled transport railway flatcars 410 are self-powered and movable. The second and fourth railway flatcars 400 are each equipped with a boom bogie. The two boom bogies are used to support the two ends of the boom 100 of the railway steel bridge rapid girder replacement unit for easy transfer. During operation, the bottom of the car body 411 of the self-propelled transport railway flatcar 410 is equipped with a power system 415 for driving its movement. This system is used to traction the railway flatcar 400 and carry new bridge girders, rail panels, and materials. At the same time, the car body 411 is equipped with two tracks 412 and two carrying trolleys 413 that can move along the two tracks 412 to adjust the position of the transported bridge girders, rail panels, and materials.

[0033] The boom bogies installed on the second and fourth railway flatcars 400 include a fixed frame 420, a slewing support 430 rotatably connected to the top of the fixed frame 420 about a vertical axis, and a slewing frame 440 connected to the top of the slewing support 430. When the boom 100 of the railway steel bridge rapid beam replacement unit is supported on the slewing frames 440 of the two boom bogies for transport, when the railway is curved, the slewing frame 440 rotates relative to the fixed frame 420 through the slewing support 430 to ensure that the center lines of the two slewing frames 440 are always on a straight line to adapt to the stable support of the boom 100 of the railway steel bridge rapid beam replacement unit by the two railway flatcars 400 under the curved railway.

[0034] The railway steel bridge rapid beam replacement unit is a single boom 100 structure. The front and rear ends of the boom 100 are respectively connected to a column 200 for supporting the roadbed or bridge deck during operation. The bottom of the boom 100 is provided with ear beams 120 on both sides. Two lifting trolleys 110 are respectively moved along the boom 100 by rolling and pressing against the two ear beams 120 via hanging wheels 130 to lift the beams. The under-mounted lifting trolleys 110 can effectively reduce the overall size of the railway steel bridge rapid beam replacement unit to meet the requirements of tunnel passage.

[0035] The column 200 includes a crossbeam sleeve 210 that slides through a through hole in the boom 100. The boom 100 is connected to a center pin 240 that slides through the middle of the crossbeam sleeve 210, allowing the crossbeam sleeve 210 to rotate relative to the boom 100 around the center pin 240. This ensures that the inner column 260, middle column 270, and outer column 280 connected to the crossbeam inner sleeves 220 at both ends of the crossbeam sleeve 210 on curved routes can also be stably supported on the roadbed or bridge surface. The crossbeam inner sleeves 220 are slidably inserted at both ends of the crossbeam sleeve 210, which allows the crossbeam inner sleeves 220 to be easily retracted into the crossbeam sleeve 210 during transportation, reducing the size of the column 200 to facilitate passage through tunnels. During operation, the inner sleeve 220 of the crossbeam extends out of the outer sleeve 210 of the crossbeam. Each inner sleeve 220 of the crossbeam is connected to two inner columns 260 through a distribution crossbeam 250. The bottoms of the two inner columns 260 are slidably inserted into the tops of two intermediate columns 270. The bottom of each intermediate column 270 is slidably inserted into the top of an outer column 280. The two outer columns 280 located on the same side of the boom 100 are connected by a cylinder seat 290. The cylinder seat 290 has two lifting grooves 320 extending along the height direction. The lifting grooves 320 have cylinder slippers 330 that can slide along them. The two lifting cylinders 300 are respectively connected to the cylinder slippers 330 and the corresponding side distribution crossbeams. The crossbeam 250 is hinged, allowing two lifting cylinders 300 to drive the intermediate column 270 to extend and retract relative to the outer column 280, and the inner column 260 to extend and retract relative to the intermediate column 270. This adjusts the height of the horizontal support leg 230 connected to the bottom of the outer column 280, so that the horizontal support leg 230 can be retracted during transport and extended to support the roadbed or bridge surface during operation. The cylinder seat 290 is provided with a lifting groove 320 extending along the height direction. The lifting groove 320 is provided with fixing holes 340 spaced apart along the height direction. The cylinder slipper 330 is connected to fixing pins 350 corresponding to each lifting groove 320. When the cylinder slipper 330 is raised or lowered, each fixing pin 350 is connected to a fixing pin 350. The fixing hole 340 connects the hydraulic cylinder slipper 330 to the hydraulic cylinder seat 290. The hydraulic cylinder slipper 330 can be fixed in the upper, middle and lower fixing holes 340 respectively to adjust the position of the lifting hydraulic cylinder 300 connected to the hydraulic cylinder slipper 330. This adjusts the degree to which the hydraulic cylinder rod of the lifting hydraulic cylinder 300 drives the inner column 260 and the middle column 270 to extend and retract when it extends and retracts. The two horizontal support legs 230 are rotatably connected to the bottom of the two outer columns 280 located on both sides of the boom 100 around the vertical axis. This allows the horizontal support legs 230 to be rotated to be parallel to the boom 100 and then retracted during transportation, and to be rotated to be perpendicular to the boom 100 and then supported on the roadbed or bridge surface during operation.

[0036] The deployment method of the railway steel bridge rapid beam replacement unit device in the railway steel bridge rapid beam replacement unit system provided in this application embodiment is as follows: Step 1: The railway flatcar 400 and the self-propelled transport railway flatcar 410 unit carry the railway steel bridge rapid beam replacement unit from the base to the beam replacement position. The railway steel bridge rapid beam replacement unit is in transport state and the two ends of the boom 100 are respectively supported on the two slewing frames 440. Step 2: Extend the two inner sleeves 220 of the crossbeam from both ends of the outer sleeve 210 of the crossbeam by a predetermined length, and pass the locking bolts 380 through a set of limiting holes 360 and two corresponding locking holes 370 in sequence to connect the inner sleeves 220 of the crossbeam to the outer sleeve 210 of the crossbeam and fix them.

[0037] Step 3: After pulling out the connecting pin 310, control the cylinder rods of the two lifting cylinders 300 to extend the inner column 260 and the middle column 270 downwards relative to the middle column 270 and the outer column 280 respectively, so that the two horizontal support legs 230 move close to the upper surface of the bridge. Step 4: Rotate the two horizontal support legs 230 by 90 degrees around the vertical axis until they are facing closer to each other, and then fix them.

[0038] Step 5: Control the cylinder rods of the two lifting cylinders 300 to extend further, causing the inner column 260 and the middle column 270 to extend downwards relative to the middle column 270 and the outer column 280, respectively, so that the two horizontal support legs 230 are supported on the road surface or bridge surface. Control the cylinder rods of the two lifting cylinders 300 to extend further, pushing the inner column 260 and the middle column 270 to continue to extend, so that the boom 100 is separated from the two boom bogies and lifted upwards. After it is in place, insert the connecting pins 310 into the connecting holes 261 on the middle column 270 and the outer column 280 respectively, and then pass through the corresponding connecting holes 261 on the inner column 260 and the middle column 270, connecting and fixing the inner column 260 and the middle column 270, and the middle column 270 and the outer column 280. The railway steel bridge rapid beam replacement unit is in working condition.

[0039] This application also provides a method for rapid replacement of railway steel bridges under operational conditions, which is carried out using the aforementioned rapid beam replacement system for railway steel bridges, and includes the following steps: Step 1: Select a suitable number of stations along the railway line as construction sites. After manufacturing new steel beams at the construction sites, use two self-propelled railway flatcars (410) to pull five railway flatcars (400) to transport the new steel beams and the railway steel bridge rapid beam replacement unit to the beam replacement position. Step 2: Deploy and support the railway steel bridge rapid beam replacement unit on the roadbed or bridge deck; Step 3: The two self-propelled transport railway flatcars 410 are separated. The first self-propelled transport railway flatcar 410 moves forward and moves away from the steel beam to be replaced. After removing the old rail panel of the preset length above the steel beam to be replaced, it is hoisted to the second self-propelled transport railway flatcar 410 using the railway steel bridge rapid beam replacement unit. The old rail panel of the preset length to be removed is 12.5 meters of track + 12.5 meters of track + L-meter short rail. Step 4: After the second section of the self-propelled transport railway flatcar 410 leaves the bridge deck and moves to the bridgehead, the old rail panels are dismantled. The old wooden sleepers are temporarily placed at the bridgehead. The old wooden sleepers and the L-meter short rails with drilled holes are reserved for later use. The other dismantled rails are placed together on the second section of the self-propelled transport railway flatcar 410. A small excavator is used to clear the ballast. Step 5: The second section of the self-propelled railway flatcar 410 is moved to the beam replacement position and the old steel beam is removed. The old steel beam is then hoisted onto the second section of the self-propelled railway flatcar 410 using the railway steel bridge rapid beam replacement unit and the transport trolley 413 on the railway flatcar 400. Step Six: Install the new steel beams, new 25-meter rail panels, and rails; Step 7: Reconnect the two self-propelled railway flatcars 410, re-support the railway steel bridge quick beam replacement unit on the railway flatcar 400 and fold it up. Check that the quality of the new steel beam meets the requirements. Use the two self-propelled railway flatcars 410 to pull the five railway flatcars 400 to transport the railway steel bridge quick beam replacement unit back to the station, ready to replace the next steel beam.

[0040] The railway steel bridge rapid beam replacement unit and system provided in this application can select a suitable number of stations along the railway line as construction sites, manufacture and assemble steel beams at the construction sites, and use railway flatcars 400 and self-propelled transport railway flatcars 410 to transport the railway steel bridge rapid beam replacement unit and steel beams to the target area for operation. It has the advantages of high construction efficiency, short road occupation time, and meeting the requirements of railway operation. Moreover, for long-line projects with a large number of steel beam segments to be replaced, the construction cost of this method is lower than that of traditional methods, solving the problem of high cost due to the need for large-tonnage truck cranes. At the same time, the transportation of new beams, dismantling of old beams, erection of new beams, and recycling of old beams are all completed by the railway steel bridge rapid beam replacement unit, without the need for other auxiliary lifting and transportation equipment, and without the need to reinforce the transportation road, solving the problem of needing large-tonnage special vehicles to transport beams and reinforce the transportation line. It can carry out beam replacement construction in locations such as canyons and rivers where truck cranes cannot reach.

[0041] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A railway steel bridge beam rapid replacement machine set device, characterized in that, It comprises: a machine arm; two trolley cranes, respectively movably connected to the bottom of the machine arm along the length direction of the machine arm, the trolley cranes being used for hoisting and transporting bridge segments; two columns, respectively connected to the two ends of the machine arm, each of the columns comprising a crossbeam outer sleeve, two crossbeam inner sleeves respectively slidingly inserted into the two ends of the crossbeam outer sleeve, and two cross legs which are liftably and rotatably connected to the two crossbeam inner sleeves around a vertical axis, the crossbeam outer sleeve being rotatably penetrated through and connected to the machine arm.

2. The railway steel bridge beam rapid beam-replacement unit set device according to claim 1, characterized in that, The machine arm is connected with a central pin slidingly penetrating through the crossbeam outer sleeve, and the two crossbeam inner sleeves are respectively connected with distribution crossbeams at the ends away from the crossbeam outer sleeve, the bottom of each of the distribution crossbeams is connected with at least one inner column, the bottom of each of the inner columns is slidingly inserted into an outer column, the outer columns located on the same side of the machine arm are connected through an oil cylinder seat, the oil cylinder seat is connected with a lifting oil cylinder, the oil cylinder rod of the lifting oil cylinder is hinged to the corresponding side distribution crossbeam, and the two cross legs are rotatably connected to the two corresponding outer columns around a vertical axis.

3. The railway steel bridge beam rapid beam-replacement unit set device according to claim 2, characterized in that, The bottom of each of the inner columns is slidingly inserted into an intermediate column, the bottom of each of the intermediate columns is slidingly inserted into an outer column, and at least two connecting holes are respectively arranged on the inner columns, the intermediate columns and the outer columns in the height direction, the inner columns and the corresponding intermediate columns and the intermediate columns and the corresponding outer columns are connected through at least one connecting pin penetrating through two corresponding connecting holes.

4. The railway steel bridge beam rapid beam-replacement unit set device according to claim 2, characterized in that, The oil cylinder seat is provided with at least one lifting groove extending in the height direction, the lifting groove is provided with an oil cylinder shoe, the lifting oil cylinder is connected to the oil cylinder shoe, each of the lifting grooves is provided with at least two fixing holes arranged in the height direction, the oil cylinder shoe is connected with a fixing pin corresponding to each of the lifting grooves, and the oil cylinder shoe is connected to the oil cylinder seat by connecting each fixing pin to a fixing hole when the oil cylinder shoe is lifted.

5. The railway steel bridge beam rapid beam-replacement unit set device according to claim 2, characterized in that, The two ends of the crossbeam outer sleeve are respectively provided with at least one set of limiting holes arranged in the length direction of the crossbeam outer sleeve, the two crossbeam inner sleeves are respectively provided with at least one locking hole corresponding to the limiting hole, and the crossbeam outer sleeve is connected with at least one locking bolt penetrating through the limiting hole and the locking hole in sequence.

6. The railway steel bridge beam rapid beam-replacement unit set device according to claim 1, characterized in that, The bottom of the machine arm is respectively provided with an ear beam on both sides, and the two sides of the trolley crane are respectively connected with at least two hanging wheels rolling against the top surface of the ear beam on the opposite side.

7. A railway steel bridge girder rapid beam replacement unit system, characterized in that, It comprises at least five railway flat cars connected in sequence, at least two movable self-propelled transport railway flat cars, and the railway steel bridge rapid beam replacing machine set device as claimed in any one of claims 1 to 6, and the two columns of the railway steel bridge rapid beam replacing machine set device are respectively supported on the two railway flat cars.

8. The railway steel bridge girder rapid beam-replacement unit system according to claim 7, characterized in that, Each of the two railway flat cars is provided with a fixing frame, the top of each of the fixing frames is respectively connected with a rotary support which can rotate around a vertical axis, the top of each of the rotary supports is connected with a rotary frame, and the two ends of the machine arm of the railway steel bridge rapid beam replacing machine set device are respectively supported on the two rotary frames.

9. The railway steel bridge girder rapid beam replacing unit system according to claim 8, characterized in that, The bottom of the slewing frame is connected with a circumferentially extending sliding seat, and the bottom of the sliding seat is provided with a first polytetrafluoroethylene plate.

10. The railway steel bridge girder rapid beam replacing unit system according to claim 9, characterized in that, The top of the fixed frame is provided with a second polytetrafluoroethylene plate which is in sliding fit with the first polytetrafluoroethylene plate.

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