Small-radius curve descending type segmental assembling bridge erecting machine

Abstract

The application discloses a small-radius curve downline type segment assembling bridge erecting machine, which comprises two groups of pier-side vertical columns symmetrically arranged outside the bridge piers, main supporting legs arranged on the pier-side vertical columns and connected with the outside of the bridge piers, and displacement trolleys arranged on the main supporting legs. The bridge erecting machine has the beneficial effects that the dead weight of the bridge erecting machine and the bridge during construction is no longer pressed on the bridge deck and the bridge pier, but is pressed on the main supporting legs, the dead weight is directly transmitted to the bearing platform by the main supporting legs, the beam surface load is not applied to the beam and the hole, and the phenomenon of bridge design comprehensive waste caused by the fact that the bridge and the bridge pier bear the temporary construction load much greater than the normal operation load during the beam erection and the hole passing of the existing upline type segment assembling bridge erecting machine is solved. Meanwhile, the bridge erecting machine adopts a foldable beam system, the shortcomings of the existing downline type segment assembling bridge erecting machine are solved, and the adaptability of the bridge erecting machine to the large-span and small-radius curve bridges is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology, and in particular to a small-radius curved downhill segmental assembly and erection bridge machine. Background Technology

[0002] In the context of rapid economic development, roads and bridges play a vital supporting role. Bridge construction technology is booming globally. In recent years, the segmental precast method has been widely used due to its advantages over other methods, such as construction safety, controllable quality, shorter construction period, lower project cost, and less damage to the ecological environment. This method requires precasting beam segments, then using a bridge erecting machine to install the beam segments in the designated positions, and finally using prestressing tensioning to form the precast beam segments into a whole to complete the bridge erection.

[0003] Bridge design is not only constrained by specific geographical conditions such as rivers and valleys, but also must prioritize land conservation. This is especially true in urban road construction, where elevated bridges are increasingly common. However, cities possess complex and variable public facilities, and land resources are scarce, making the available land for transportation planning and construction very limited within existing boundaries. Therefore, bridge design often employs small-radius curves and large spans to address these challenges, placing higher demands on bridge-building machines.

[0004] Currently, many types of bridge erecting machines have emerged both domestically and internationally, suitable for the construction of segmental bridges. These machines generally have the main load-bearing beam located above the bridge deck, supported by outriggers on the piers and the top surface of the existing bridge structure. We collectively name this type of bridge erecting machine "upward-moving bridge erecting machine." A significant characteristic of upward-moving bridge erecting machines is that during beam erection, the construction load is transferred to the bridge deck via the outriggers, and then to the supports and piers via the concrete beams. When the bridge erecting machine crosses a span, there are concentrated or moving loads on the beam surface. Generally, bridge erecting machines have a large self-weight, reaching hundreds of tons or even over a thousand tons. Therefore, the temporary load during construction is generally much greater than the design load during normal bridge operation, thus placing higher demands on the stress on the bridge and supports. Controlling the bridge design and support selection based on this temporary construction load would undoubtedly result in significant cost waste.

[0005] When adapting to curved construction, upward-moving segmental bridge erecting machines typically achieve this through offset lateral movement of the outriggers and main beam, supplemented by trolley lateral movement and suspended lateral movement. Generally, this type of upward-moving bridge erecting machine can adapt to the construction of straight bridges and bridges with large curve radii. However, when encountering the construction of bridges with smaller curve radii, significant difficulties arise due to limitations in eccentric force and lateral overturning stability. To expand the adaptability of upward-moving bridge erecting machines to curves, industry colleagues have made many beneficial attempts and efforts. A representative approach is to install horizontal pivot hinges on the main beam, a practice that has been documented in some engineering projects and literature. However, all current literature and engineering practices involve installing horizontal pivot hinges on the guide beam in the unloaded bearing area; there are currently no engineering practices or literature reports on installing horizontal pivot hinges on the main beam in the heavy-load bearing area.

[0006] In contrast to the concept of "upward-moving bridge erecting machine", another type of bridge erecting machine has its main load-bearing beam located below the top surface of the bridge. The main beam is supported by outriggers on the piers or abutments. We uniformly name this type of bridge erecting machine "downward-moving bridge erecting machine".

[0007] The "movable support" at that time involved placing some prefabricated components on a support that could move longitudinally through the opening. Large gaps were left between the prefabricated components, and they were connected to each other by tying steel bars. Then, the prefabricated components were connected into a whole by installing formwork and pouring concrete. After the cast-in-place concrete reached a certain strength, the bridge was formed into a whole by tensioning prestressed steel strands.

[0008] Based on the aforementioned "mobile support" construction process, it can be observed that this method differs from both current mobile formwork and current segmental assembly bridge erecting machines. However, it shares similarities with current segmental assembly bridge erecting machines. The "mobile support" method from this specific historical period conceptually conforms to the definition of a "downward" method, but its process differs somewhat from that of a "bridge erecting machine." Therefore, it can be considered that the "mobile support" method is the precursor to the current segmental assembly bridge erecting machine.

[0009] Currently, when searching using "downward-facing bridge erecting machine" as a keyword, the retrieved literature mainly focuses on the early concept of "moving support". There are a few documents involving the true concept of a bridge erecting machine, but these are only suitable for a small minimum curve radius and a small span, which cannot meet the requirements of small-radius curves and large spans required by the aforementioned bridges.

[0010] In summary, many types of segmental bridge erecting machines have emerged both domestically and internationally, with the ascending segmental bridge erecting machine being the vast majority. However, the literature reports and engineering practices of "descending bridge erecting machines" are mostly "mobile supports" that appeared in a specific historical period. There are relatively few true descending segmental bridge erecting machines, and their span and curve adaptability are quite limited. Summary of the Invention

[0011] The purpose of this invention is to propose a small-radius curved down-going segmental assembly bridge erection machine, which can effectively avoid and solve the comprehensive waste caused by the temporary construction load on the bridge and bearings being much greater than the normal operating load when the existing up-going segmental assembly bridge erection machine is erecting beams and crossing spans; at the same time, it can solve the shortcomings of the existing down-going segmental assembly bridge erection machine and expand its adaptability to bridges with larger spans and small-radius curves.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A small-radius curved downhill segmental bridge erecting machine includes:

[0014] Two sets of symmetrical columns are set on the outside of the bridge piers;

[0015] The main support leg is set on the column next to the pier and is snapped onto the outside of the pier.

[0016] A transfer trolley mounted on the main support leg;

[0017] The main beam system is mounted on a shifting trolley, which can drive the main beam system to move laterally or longitudinally.

[0018] A crane mounted on the main beam system, which can move on the main beam system, is used to install segment blocks onto the segment block support system;

[0019] The segmental block support system is installed on the main beam system. The segmental block support system is used to support the segmental blocks and to adjust the spatial position of the segmental blocks in conjunction with the crane.

[0020] Preferably, the segmental block support system includes a support crossbeam disposed on the main beam system, a support longitudinal beam disposed above the support crossbeam, a height-adjustable strut disposed above the support longitudinal beam for supporting the segmental block, a longitudinal stabilizing diagonal brace disposed between the strut and the support longitudinal beam, and a transverse stabilizing diagonal brace disposed between the strut and the support crossbeam.

[0021] Preferably, the main support leg includes a first locking part and a second locking part that are locked at different heights on the outside of the pier. The first locking part is located on the lower section of the support leg, and the second locking part is located on the upper crossbeam of the support leg that supports the shifting trolley. A support leg diagonal brace is provided between the lower section of the support leg and the upper crossbeam of the support leg.

[0022] Preferably, the first snap-fit ​​part and the second snap-fit ​​part have the same specifications. The second snap-fit ​​part includes two first snap plates that contact the two sides opposite to the pier. A tie rod is provided between the two first snap plates. A second snap plate extending towards the pier is provided on the first snap plate. Snap-fit ​​studs and washers that contact the other two sides of the pier are screwed onto the second snap plate.

[0023] Preferably, the main beam system includes two longitudinal beams with identical structures. Each longitudinal beam consists of a main beam composed of at least two main beam segments connected by a hinge joint. Guide beams are provided at both ends of the main beams, and the guide beams are connected to the main beam segments by hinge joints. Each hinge joint includes two sets of hinge blocks, which are respectively disposed on two connected main beam segments. The two sets of hinge blocks are connected by a first pin. Two sets of retractable first driving devices are provided between the two sets of hinge blocks. One of the two sets of first driving devices extends while the other retracts to achieve relative rotation of the two sets of hinge blocks. The webs of the two connected main beam segments are arranged in a concave-convex shape at the connection point.

[0024] Preferably, the longitudinal beam is provided with a reciprocating connecting beam segment. The connecting beam segments at corresponding positions on two longitudinal beams can be closed and connected or opened. The connecting beam segments that are closed and connected form a connecting beam, making the main beam system a frame structure.

[0025] Preferably, the transfer trolley includes a lower frame mounted on the main support leg. The lower frame is rotatably connected to the upper frame via a horizontal rotation mechanism. The bottom of the lower frame is provided with a lower hook for connecting to the main support leg, and the top of the upper frame is provided with an upper hook for connecting to the main beam. The upper frame is connected to a longitudinal movement mechanism for driving the main beam to move longitudinally, and the lower frame is connected to a lateral movement mechanism for driving the transfer trolley to move laterally.

[0026] Preferably, the crane includes a crane beam, on which a hoisting system and a trolley traversing system are provided. A lifting device is connected below the hoisting system. A first leg and a second leg are respectively provided at the bottom of both ends of the crane beam. The bottom of the first leg and the second leg are connected to traveling wheels through a trolley slewing mechanism. One of the first leg and the second leg can be horizontally moved along the length of the crane beam and connected to the crane beam through a roller and counter-pressure roller mechanism, while the other leg is fixedly connected to the crane beam.

[0027] Preferably, the bottom of the second leg is provided with a bent portion, and the lower part of the bent portion is connected to the walking wheel.

[0028] Preferably, the bottom of the first leg is connected to one end of the horizontal folding part, and the other end of the horizontal folding part is connected to the balance beam through the balance beam rotation mechanism, which can rotate both horizontally and vertically. Two walking wheels are symmetrically arranged at both ends of the lower part of the balance beam.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. During construction, the self-weight of the bridge erecting machine and the self-weight of the bridge being erected no longer rests on the existing beams and piers. Instead, the self-weight load is directly transferred to the pier through the main support legs. This solves the problem of overall waste in bridge design caused by the temporary construction load on the bridge and piers being much greater than the normal operating load when the existing upward segmental assembly bridge erecting machine is used for beam erection and span crossing.

[0031] 2. The main beam segments are connected by hinged joints to form a foldable main beam system, which maximizes the alignment of the longitudinal beams and curved beams of the main beam system of the bridge erecting machine. The connecting beam segments on the two longitudinal beams are joined together to make the main beam system a frame structure, which ensures the lateral overturning stability of the foldable main beam system and can meet the needs of small radius curves and large span construction.

[0032] 3. The shifting trolley is matched with the main beam system, which can push the main beam system to move longitudinally along the bridge erection direction. When the main beam system moves longitudinally through the span, it can also push the main beam system to move laterally to meet the construction requirements.

[0033] 4. The crane is matched with the main beam system, which greatly expands the crane's adaptability to irregular tracks such as zigzag tracks, non-parallel tracks, and tracks with different surfaces. Attached Figure Description

[0034] Figure 1 This is the front view of the present invention patent;

[0035] Figure 2 This is a top view of the present invention patent, excluding the crane and segmental block support system;

[0036] Figure 3 for Figure 1 AA section view;

[0037] Figure 4 This is a schematic diagram of the segmental block support system.

[0038] Figure 5 This is the front view of the segmental block support system;

[0039] Figure 6 for Figure 5 Enlarged view of a portion of the image (I);

[0040] Figure 7 Axonometric view of the main support leg;

[0041] Figure 8 Front view of the main support leg;

[0042] Figure 9 for Figure 8 BB cross-sectional view;

[0043] Figure 10 Top view of the main beam system;

[0044] Figure 11 A partial top view of the connection point of the main beam segment in the main beam system;

[0045] Figure 12 for Figure 11 The main view;

[0046] Figure 13 A schematic diagram of the closure connection of the connecting beam segments in the main beam system;

[0047] Figure 14 A schematic diagram of the opening of the connecting beam segment in the main beam system;

[0048] Figure 15 This is the front view of the transfer trolley;

[0049] Figure 16 This is a top view of the transfer trolley;

[0050] Figure 17 for Figure 15 EE sectional view;

[0051] Figure 18 This is a diagram illustrating the hook attachment.

[0052] Figure 19 This is a schematic diagram of the slide.

[0053] Figure 20 This is the front view of the crane;

[0054] Figure 21 for Figure 20 CC section view;

[0055] Figure 22 for Figure 20 DD sectional view.

[0056] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0057] The present invention will now be further described with reference to the accompanying drawings.

[0058] like Figure 1 As shown in Figures 3 and 8, an embodiment of the present invention provides a segmental bridge erecting machine for a small-radius curve descent, comprising:

[0059] Two sets of pier-side columns 500 are symmetrically arranged outside the pier 700; the pier-side columns 500 include columns 501 and column bases 502.

[0060] The main support leg 300 is installed on the pier side column 500 and is snapped onto the outside of the pier 700. The self-weight of the bridge erecting machine and the self-weight of the bridge being erected are transferred to the pier side column 500 through the main support leg 300, and then transferred to the pier cap through the pier side column 500. The bridge and pier 700 do not need to bear the load, thus avoiding the comprehensive waste of the design caused by the temporary construction load of the bridge pier that is much greater than the normal operating load. The main support leg 300 is only snapped onto the outside of the pier 700 for installation and positioning.

[0061] A transfer trolley 400 is mounted on the main support leg 300;

[0062] The main beam system 100 is set on the shifting trolley 400. The shifting trolley 400 can drive the main beam system 100 to move laterally or longitudinally. The longitudinal movement is used for the overall bridge erecting machine to travel through the span, and the lateral movement is used to adjust the lateral position of the two main beams of the main beam system 100 during the construction of small curves.

[0063] A crane 600 is mounted on the main beam system 100. The crane 600 is movable on the main beam system 100 and is used to install the segment block 800 above the segment block support system 200.

[0064] The segmental block support system 200 is installed on the main beam system 100. The segmental block support system 200 is used to support the segmental block 800 and can adapt to the needs of longitudinal slope, transverse slope and curved state segmental block 800 posture adjustment. In cooperation with the crane 600, the segmental block 800 is adjusted to a suitable angle and supported and fixed.

[0065] like Figure 4 As shown in Figure 6, the segmental block support system 200 includes a support beam 205 mounted on the main beam system 100, a support longitudinal beam 204 mounted above the support beam 205, and a height-adjustable strut 201 mounted above the support longitudinal beam 204 to support the segmental block 800. A longitudinal stabilizing brace 203 is mounted between the strut 201 and the support longitudinal beam 204, and a transverse stabilizing brace 202 is mounted between the strut 201 and the support beam 205. After the crane installs the segmental block 800 onto the designated segmental block support system 200 and adjusts it to a suitable posture, the height of the strut 201 is adjusted to support the segmental block 800 in the designated posture. The strut 201 includes a fixed part 211 and a sliding part 212 that can slide and lock on the fixed part 211, which is used to adjust and fix the height of the strut 201. The top of the sliding part 212 is also provided with a ball joint, which can rotatably contact the bottom of the segment block 800. Both the sliding part 212 and the ball joint are existing technologies and will not be described in detail in this embodiment.

[0066] like Figure 7As shown in Figure 9, the main support leg 300 includes a first locking part 304 and a second locking part 305 that are locked at different heights on the outside of the pier 700. The first locking part 304 is located on the lower section 303 of the support leg, and the second locking part 305 is located on the upper crossbeam 301 of the support leg that supports the shifting trolley 400. A support leg diagonal brace 302 is provided between the lower section 303 of the support leg and the upper crossbeam 301 of the support leg, forming a stable load-bearing structure for the main support leg 300, which facilitates the support of the shifting trolley 400 and the main beam system 100 installed on it.

[0067] The first snap-fit ​​part 304 and the second snap-fit ​​part 305 have the same specifications. The second snap-fit ​​part 305 includes two first snap-fit ​​plates 351 that contact the two opposite sides of the pier 700. A tie rod 352 is provided between the two first snap-fit ​​plates 351. The tie rod 352 is used to tighten the two first snap-fit ​​plates 351 so that they are close to the side of the pier 700. A second snap-fit ​​plate 353 extending towards the pier 700 is provided on the first snap-fit ​​plate 351. A snap-fit ​​stud 354 that contacts the other two sides of the pier 700 is screwed onto the second snap-fit ​​plate 353. A pad is provided on the contact surface between the snap-fit ​​stud 354 and the pier 700. Tightening the snap-fit ​​stud 354 makes the pad close to the other two sides of the pier 700. The rectangular snap-fit ​​frame formed by the snap-fit ​​part is close to the side wall of the pier 700 to prevent the main support leg 300 from shaking during installation.

[0068] like Figure 10-14 As shown, the main beam system includes two longitudinal beams 110 with identical structures. The longitudinal beam 110 includes a main beam 102 composed of four main beam segments 121. The main beam segments 121 are connected by hinge joints 103. One of the hinge joints 103 is located in the heavy-load working area of ​​the main beam. The hinge joint can realize the relative horizontal rotation between the main beam segments 121, so that the alignment of the longitudinal beams 110 of the bridge erecting machine's main beam system matches the alignment of the curved beam to the greatest extent, in order to meet the construction requirements of small radius curves. Guide beams 101 are set at both ends of the main beam 102, and the main beam 102 and the guide beams 101 are also connected by hinge joints.

[0069] Connecting beam segments 141 are provided on the longitudinal beams 110. The connecting beam segments 141 on the two longitudinal beams 110 are joined together to form a connecting beam 104, making the main beam system a frame structure. The center of gravity of the frame structure is located between the two longitudinal beams 110, avoiding the risk of lateral overturning of the bridge erecting machine during the construction of small-radius curved bridges.

[0070] The hinge joint 103 includes two sets of hinge blocks 131, which are respectively disposed on two connected main beam segments 121. Each set of hinge blocks 131 includes two hinge blocks disposed at the upper and lower ends of the main beam segment 121. The two sets of hinge blocks 131 are connected by a first pin 132, which is disposed at two locations at the upper and lower ends of the main beam segment 121. Two sets of retractable first drive devices 133 are disposed between the two sets of hinge blocks 131. The two ends of the first drive device 133 are respectively disposed at the two hinge blocks 131 connected by the first pin 132. One of the two sets of first drive devices 133 extends and the other retracts to achieve relative rotation of the two sets of hinge blocks 131. The first drive device 133 can be a hydraulic cylinder. By controlling different extension / retraction distances, different bending angles between the main beam segments 121 can be achieved.

[0071] A transition rail 122 is provided at the connection point of the two connected main beam segments 121. The outer side of the connection point of the two connected main beam segments 121 is a gap, which is connected by the transition rail 122 to form a complete track for the crane to move longitudinally on the main beam segment 121. The transition rail 122 is connected to the two main beam segments 121 by bolts, so that when the hinge joint rotates relative to each other, the longitudinal track of the crane can be smoothly connected into a whole in a zigzag shape through the transition rail 122. When the hinge joint 103 rotates relative to each other, the transition rail 122 can be replaced as needed according to the different rotation angles. The bolt connection can well meet the strength requirements and replacement needs.

[0072] The main beam section 121 is provided with an opening 123. The opening 123 is connected to the transverse movement device 142 by a second pin 143. The transverse movement device 142 is provided with a connecting beam section 141 that can move laterally back and forth. The transverse movement device 142 can rotate within the main beam section 121 to realize the rotation of the connecting beam section 141 relative to the main beam section 121, so as to adapt to the change in horizontal angle between the two when the beam is erected in a curved state and when it travels through the opening.

[0073] A retractable second drive device 146 is provided between the connecting beam segment 141 and the transverse movement device 142. The two ends of the second drive device 146 are respectively provided on the connecting beam segment 141 and the transverse movement device 142. The second drive device 146 can be a hydraulic cylinder. When it extends, it drives the connected connecting beam segment 141 to separate to both sides. When it shortens, it drives the connected connecting beam segment 141 to move towards the center to achieve connection.

[0074] The transverse movement device 142 includes a transverse movement frame, and a transverse movement guide wheel is provided inside the transverse movement frame to contact the side wall of the connecting beam segment. When the connecting beam segment 141 moves within the transverse movement device 142, its movement is limited by the transverse movement guide wheel to prevent deviation, and at the same time to prevent the side wall of the connecting beam segment 141 from rubbing against the inner wall of the transverse movement frame 144, which would cause equipment wear.

[0075] The web 124 at the connection point of the two connected main beam segments 121 is arranged in a concave-convex shape to meet the requirement of shear force transmission at the hinge joint.

[0076] The connecting beam segments 141 on the two longitudinal beams 110 are detachably connected by bolts. During the bridge erection process, the connecting beam segments 141 and the two longitudinal beams 110 are connected as one unit by bolts. During the journey, the bolts are removed before encountering the pier, and the connecting beam 104 is opened to avoid interference and collision with the pier 700. After the connecting beam segments 141 pass the pier, they are closed and connected in time.

[0077] The longitudinal beam 110 can be bent according to specific working conditions to meet the needs of curved construction. The two longitudinal beams 110 are connected by the connecting beam 104 to form a frame structure, which avoids the risk of lateral overturning of the main beam system during small-radius curved construction.

[0078] like Figure 15 As shown in Figure 19, the shifting trolley includes a lower frame 412 mounted on the main support leg. The lower frame 412 is rotatably connected to the upper frame 411 via a slewing mechanism 402. The slewing mechanism 402 has a pivot in the middle, which enables relative slewing of the upper frame 411 relative to the lower frame 412, better adapting to the angle adjustment of the main beam during curved construction. The lower frame 412 has a lower hook 408 at the bottom that connects to the main support leg, connecting the trolley itself to the main support leg. The upper frame 411 has an upper hook 404 at the top that connects to the main beam 100, connecting the trolley itself to the main beam 100.

[0079] The upper frame 411 is connected to a longitudinal movement mechanism that drives the main beam 100 to move longitudinally, thereby enabling the bridge erecting machine to travel across the span. The lower frame 412 is connected to a lateral movement mechanism that drives the trolley to move laterally, thereby enabling the relative lateral movement between the trolley device itself and the main support leg.

[0080] Two symmetrical sliding blocks 403 are arranged on both sides of the top of the upper frame 411, with upper hooks 404 mounted on the sliding blocks 403. The main beam 100 is pressed onto the sliding blocks 403, and its weight is borne by the sliding blocks 403. The longitudinal movement mechanism drives the main beam 100 to move on the sliding blocks 403. A pull-back device 405 is provided between the two sliding blocks 403. Due to machining errors and wear caused during installation and use, the distance between the upper hooks 404 of the two sliding blocks 403 may change. This change may cause a gap between the upper hooks 404 and the main beam 100, leading to the risk of disengagement during use. The pull-back device 405 can be a stud. By pulling and rotating the nuts at both ends, the distance between the two sliding blocks 403 can be slightly adjusted to control the gap between the upper hooks 404 and the main beam 100, thus avoiding the risk of disengagement. Figure 2As shown, tightening or loosening the nut on the pull-out device 405 located outside the slide 403 can slightly adjust the distance between the two slides 403.

[0081] The upper hook 404 includes a stud 441, on which two positioning nuts 442 are screwed. The stud 441 is also provided with a mounting portion 444 that mates with the slide 403. Figure 6 As shown, a sleeve 431 that mates with the mounting part 444 is provided on the outer side of the slide block 403. The mounting part 444 extends into the sleeve 431 and its height within the sleeve 431 is controlled by the positioning nut 442. A hook 443 is provided on the mounting part 444, and the two are fixedly connected. The mounting part 444 and the hook 443 are located between two positioning nuts 442. The mounting part 444 and the hook 443 can move up and down between the two positioning nuts 442. After reaching a suitable height, the positioning nut 442 is tightened to fix the height of the hook 443.

[0082] The longitudinal movement mechanism includes a support 462 mounted on the upper frame 411. A retractable third drive device 461 is mounted on the support 462. The telescopic end of the third drive device 461 is connected to the longitudinal movement seat 463. The third drive device 461 can be a hydraulic cylinder. When it extends, it drives the longitudinal movement seat 463 to move to the right, and when it shortens, it drives the longitudinal movement seat 463 to move to the left.

[0083] The longitudinal sliding seat 463 includes a frame 464. A rotatable tongue plate 465 is connected to the frame 464 via a third pin 466. A fourth pin 467, which limits the rotation angle of the tongue plate 465, is also inserted inside the frame 464. The tongue plate 465 is connected to the main beam 100. The fourth pin 467 is located on either side of the lower part of the tongue plate 465. In this embodiment, the third driving device 461 drives the main beam 100 to move to the right, therefore the fourth pin 467 is located at the lower part of the tongue plate 465. On the right side, the tongue plate 465 is restricted from rotating to the left by the fourth pin 467. When the longitudinal sliding seat 463 moves to the right, the lower part of the main beam 100 extends into the groove of the frame 464 and contacts the tongue plate 465. Since the tongue plate 465 cannot turn to the left, the main beam 100 is driven to move to the right as the longitudinal sliding seat 463 moves to the right. When the longitudinal sliding seat 463 moves to the left, the tongue plate 465 turns to the right under the pressure of the lower part of the main beam 100, and can smoothly return to its original position, which facilitates the next rightward movement of the main beam 100.

[0084] The lateral movement mechanism includes a fourth drive device 471 mounted on the lower frame 412. The telescopic end of the fourth drive device 471 is connected to a lateral movement seat 472, which is connected to the main support leg. The fourth drive device 471 can be a hydraulic cylinder. The cylinder extends or retracts to move the trolley itself on the main support leg, thereby adjusting the lateral relative position of the two longitudinal beams of the main beam system 100 pressed on the trolley, so that the bridge erecting machine can pass smoothly over the bridge pier during travel.

[0085] The upper frame 411 can rotate relative to the lower frame 412, better adapting to the angle adjustment of the main beam system 100 during curved construction; the longitudinal movement mechanism avoids the need for manual replacement of pins during use, improving efficiency; the pull device 405 can adjust the gap between the upper hook 404 and the main beam system 100 to prevent disengagement.

[0086] like Figure 20 As shown in Figure 22, the crane includes a crane beam 601, on which a hoisting system 610 and a trolley traversing system 611 are mounted. A lifting device 612 is connected to the lower part of the hoisting system 610. A first outrigger 602 and a second outrigger 603 are respectively mounted at the bottom of both ends of the crane beam 601. The bottom of both the first outrigger 602 and the second outrigger 603 are connected to traveling wheels 605 through a trolley slewing mechanism 606, allowing the traveling wheels 605 to rotate relative to the outriggers and move smoothly when passing through a zigzag track. In this embodiment, one of the first leg 602 and the second leg 603 is horizontally movably connected to the crane beam 601 via a roller and anti-pressure roller mechanism 604, while the other is fixedly connected to the crane beam 601. One of the legs can move horizontally along the crane beam 601 via the roller and anti-pressure roller mechanism 604, making the distance between the two legs adjustable and better able to handle zigzag tracks. In this embodiment, because the bottom of the first leg 602 has a lot of structures, the roller and anti-pressure roller mechanism 604 is connected to the second leg 603.

[0087] The idler roller and anti-pressure roller mechanism 604 is sleeved on the outside of the crane beam 601. The idler roller and anti-pressure roller mechanism 604 is provided with a rotating wheel that contacts the upper and lower rails of the crane beam 601. The rotating wheel has a rim that can play a guiding role, so that the movement of the idler roller and anti-pressure roller mechanism 604 is smoother.

[0088] The crane beam 601 is equipped with a limiting plate 613 to control the movement distance of the idler roller and the counter-pressure roller mechanism 604, so as to prevent them from falling off the crane beam 601 or interfering with the lifting device 612.

[0089] The second leg 603 is "A" shaped. The top of the second leg 603 is connected to the crane beam 601, and two traveling wheels 605 are provided at the bottom of the second leg 603.

[0090] The bottom of the second leg 603 is provided with a bent portion 607. The lower part of the bent portion 607 is connected to the traveling wheel 605. The bent portion 607 can be bent inward or outward of the crane, so as to reduce or increase the lateral spacing between the crane's traveling tracks while having the same lifting space; or, under the premise that the lateral spacing between the crane's traveling tracks is the same, the lifting space of the crane can be increased or decreased. In this embodiment, the bent portion 607 is bent inward of the crane to increase the lifting space of the crane.

[0091] The lower part of the first leg 602 is rotatably connected to the balance beam 608 via the balance beam rotation mechanism 609. Two walking wheels 605 are symmetrically arranged at both ends of the lower part of the balance beam 608. The balance beam 608 can rotate horizontally along the first leg 602 via the balance beam rotation mechanism 609 and can also rotate vertically around the balance beam rotation mechanism 609. When the track is uneven, i.e., different surfaces, the vertical rotation of the balance beam 608 can make both walking wheels 605 at its bottom contact the track, so that the walking process is stable.

[0092] The traveling wheel 605 is housed within a wheel box, which is rotatably connected to the trolley slewing mechanism 606. The trolley slewing mechanism 606 is located at the bottom of the equalizing beam 608. The wheel box drives the traveling wheel 605 to rotate along the trolley slewing mechanism 606 and the equalizing beam 608. When there are broken or non-parallel tracks, the rotation of the traveling wheel 605 ensures that the traveling wheel 605 and the track always maintain good fit, preventing track wear.

[0093] The bottom of the first leg 602 is connected to one end of the horizontal bend 671. The other end of the horizontal bend 671 is rotatably connected to the balance beam 608 through the balance beam rotation mechanism 609. The horizontal bend 671 is horizontally arranged and can be oriented towards the inside or outside of the crane, which has the same effect as the bending part 607.

[0094] The equalizing beam rotation mechanism 609 is connected to the equalizing beam 608 via the second pin 692. The equalizing beam rotation mechanism 609 is connected to the horizontal bend 671 via the stud 691. It can rotate vertically around the second pin 692 or horizontally around the stud 691, thus realizing the horizontal and vertical rotation of the equalizing beam 608 driving the traveling wheel 605.

[0095] The bending section 607 and the transverse bending section 671 adjust the lateral spacing between the hoisting space or the crane's traveling rails; at the same time, they greatly expand the crane's adaptability to irregular rails such as zigzag rails, non-parallel rails, and rails with different surfaces, providing strong technical support for the research and development of construction equipment; and more generally expand the adaptability and application range of the crane.

[0096] In the beam erection phase of this invention: a crane 600 is used to lift segmental blocks 800 sequentially from under the bridge span and place them on the segmental block support system 200. The crane 600 is then used to align, glue, and temporarily tension the segmental blocks 800 sequentially. After one span of beam is placed and temporarily tensioned, the prestressed steel strands are installed and tensioned as a whole, forming a single span of beam. The beam-lowering jacks lift the erected beam to unload the bridge erecting machine, separating the segmental blocks 800 from the segmental block support system 200. The bridge erecting machine is then ready to pass through the span. After the bridge erecting machine passes through the span, the beam-lowering jacks lower the beam, and the entire span of concrete beam is supported on the pier supports, completing one beam erection cycle.

[0097] In the via state, the present invention: as follows Figure 1 As shown, the main support leg 300 (including the pier side column 500 and the shifting trolley 400) is installed on the pier 700 in front of the main beam system 100. After the tensioning of the erected segment blocks is completed, the beam-dropping jack lifts the erected segment blocks to unload the bridge erecting machine. The segment block 700 and the segment block support system 200 are separated. The longitudinal movement mechanism of the shifting trolley 400 is activated to move the whole machine forward by one span. When the main beam system 100 moves longitudinally, the shifting trolley 400 can realize the adaptive lateral movement of the main beam system 100 on the main support leg 300 through the lateral movement mechanism. During the forward movement, the connecting beam 104 of the main beam system 100 opens laterally in sequence to avoid the pier 700. After passing the pier 700, it closes again. After the span is in place, the beam-dropping jack drops the beam, and the whole span concrete beam is supported on the support of the pier, completing one span cycle.

[0098] The above description of the beam erection and span crossing operations is a textual description based on the installation of beam-lowering jacks on the pier tops. Installing beam-lowering jacks on the pier tops is a conventional process in bridge construction, but it is not the only process. Those skilled in the art should know that any solution that achieves the technical objective of this invention by merely modifying the beam-lowering jacks (such as setting the jacks on a trolley) should still be included within the protection scope of this invention.

[0099] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0100] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify 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. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0101] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A small-radius curve descending type segmental assembling bridge-erecting machine, characterized in that, include: Two sets of symmetrical columns are set on the outside of the bridge piers; The main support leg is set on the column next to the pier and is snapped onto the outside of the pier. A transfer trolley mounted on the main support leg; The main beam system is mounted on a shifting trolley, which can drive the main beam system to move laterally or longitudinally. A crane mounted on the main beam system, which can move on the main beam system, is used to install segment blocks onto the segment block support system; The segmental block support system is installed on the main beam system. The segmental block support system is used to support the segmental blocks and to adjust the spatial position of the segmental blocks in conjunction with the crane. The main support leg includes a first locking part and a second locking part that are locked at different heights on the outside of the pier. The first locking part is located on the lower section of the support leg, and the second locking part is located on the upper crossbeam of the support leg that supports the shifting trolley. A support leg diagonal brace is provided between the lower section of the support leg and the upper crossbeam of the support leg. The first and second snap-fit ​​parts have the same specifications. The second snap-fit ​​part includes two first snap plates that contact the two sides opposite to the pier. A tie rod is provided between the two first snap plates. A second snap plate extending towards the pier is provided on the first snap plate. Snap-fit ​​studs and washers that contact the other two sides of the pier are screwed onto the second snap plate. The main beam system includes two longitudinal beams with identical structures. Each longitudinal beam consists of a main beam composed of at least two main beam segments connected by a hinge joint. Guide beams are provided at both ends of the main beams, and the guide beams are connected to the main beam segments by hinge joints. Each hinge joint includes two sets of hinge blocks, which are respectively set on two connected main beam segments. The two sets of hinge blocks are connected by a first pin. Two sets of retractable first driving devices are provided between the two sets of hinge blocks. One of the two sets of first driving devices extends while the other retracts to achieve relative rotation of the two sets of hinge blocks. The webs of the two connected main beam segments are arranged in a concave-convex shape at the connection point.

2. The small-radius curve descending segmental assembly bridge erecting machine according to claim 1, characterized in that, The segmental block support system includes a support crossbeam mounted on the main beam system, a support longitudinal beam mounted above the support crossbeam, and a height-adjustable strut mounted above the support longitudinal beam for supporting the segmental blocks. A longitudinal stabilizing diagonal brace is mounted between the strut and the support longitudinal beam, and a transverse stabilizing diagonal brace is mounted between the strut and the support crossbeam.

3. The small-radius curve descending segmental assembly bridge erecting machine according to claim 1, characterized in that, The longitudinal beams are provided with reciprocating connecting beam segments. The connecting beam segments at corresponding positions on two longitudinal beams can be closed and connected or opened. The closed connecting beam segments form connecting beams, making the main beam system a frame structure.

4. The small-radius curve descending segmental assembly bridge erecting machine according to claim 1, characterized in that, The transfer trolley includes a lower frame mounted on the main support leg. The lower frame is rotatably connected to the upper frame via a horizontal rotation mechanism. The bottom of the lower frame is provided with a lower hook for connecting to the main support leg, and the top of the upper frame is provided with an upper hook for connecting to the main beam. The upper frame is connected to a longitudinal movement mechanism that drives the main beam to move longitudinally, and the lower frame is connected to a lateral movement mechanism that drives the transfer trolley to move laterally.

5. The small-radius curve descending segmental assembly bridge erecting machine according to claim 1, characterized in that, The crane includes a crane beam, on which a hoisting system and a trolley traversing system are installed. A lifting device is connected to the bottom of the hoisting system. A first leg and a second leg are respectively installed at the bottom of both ends of the crane beam. The bottom of the first leg and the second leg are connected to traveling wheels through a trolley slewing mechanism. One of the first leg and the second leg can be horizontally moved along the length of the crane beam and connected to the crane beam through a roller and counter-pressure roller mechanism. The other leg is fixedly connected to the crane beam.

6. A small-radius curve descending segmental assembly bridge erecting machine according to claim 5, characterized in that, The bottom of the second leg is provided with a bend, and the lower part of the bend is connected to the walking wheel.

7. A small-radius curve descending segmental bridge erecting machine according to claim 5, characterized in that, The bottom of the first leg is connected to one end of the horizontal folding part, and the other end of the horizontal folding part is connected to the balance beam through the balance beam horizontal rotation mechanism, which can rotate both horizontally and vertically. Two walking wheels are symmetrically arranged at both ends of the lower part of the balance beam.

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