Improved bridge erecting machine capable of automatically passing through rigid arch bridge

Abstract

The utility model provides an improved bridge erecting machine capable of automatically passing through a rigid arch bridge, and particularly relates to the technical field of bridge construction equipment. Aiming at the problems of limited width, low construction efficiency, insufficient safety and the like of the traditional bridge erecting machine, the utility model provides the improved bridge erecting machine capable of automatically passing through the rigid arch bridge, which comprises a guide beam machine and a rear support leg arranged at the tail end of a main beam of the bridge erecting machine, the guide beam machine comprises a guide beam main body, and a short upper cross beam is arranged at the end part of the guide beam main body; a group of short hanging wings are symmetrically and rotationally arranged on two sides of the short upper cross beam; the rear supporting leg comprises a supporting leg body and a foldable stand column, and the supporting leg body is rotationally connected with the foldable stand column. According to the device, through design optimization of a rear supporting leg folding structure, a beam guiding machine width adjusting structure and a temporary supporting system, the flexible adaptability of the bridge girder erection machine when the bridge girder erection machine passes through narrow spaces such as a steel arch bridge is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction equipment technology, specifically to a modified bridge erecting machine capable of independently crossing rigid arch bridges. Background Technology

[0002] In modern bridge construction, bridge erecting machines are crucial equipment used to hoist and erect precast bridge beams onto piers. However, in actual construction, bridge erecting machines face many challenges, especially when navigating narrow spaces such as steel arch bridges, where their width and height are limited, making it difficult to meet construction requirements.

[0003] Existing bridge erecting machines are typically designed with wide guide beams, rigid rear legs, and fixed structures, leading to the following problems: The limited span dimensions of special bridges such as steel arch bridges mean that the width of the guide beams and rear legs of traditional bridge erecting machines cannot meet the requirements for passage through narrow spaces, severely limiting their applicability. To overcome the limitations of bridge erecting machines passing through steel arch bridges, traditional methods usually require additional disassembly of some components or reversal operations. This not only increases construction time but also significantly reduces equipment adaptability and construction efficiency. During construction, the fixed rear legs and guide beams of existing bridge erecting machines are difficult to adjust flexibly, making the machines prone to instability or tilting under non-standard construction conditions, posing significant safety hazards. Summary of the Invention

[0004] To address the aforementioned problems of limited width, low construction efficiency, and insufficient safety of bridge erecting machines, this utility model aims to provide a modified bridge erecting machine capable of autonomously crossing rigid arch bridges. The device of this utility model features optimized designs for the rear outrigger folding structure, the guide beam machine width adjustment structure, and the temporary support system, enabling the bridge erecting machine to achieve flexible adaptability and efficient erection capabilities when traversing narrow spaces such as steel arch bridges.

[0005] The main idea of ​​the technical solution adopted in this utility model is as follows: This device modifies the rear outriggers, guide beam machine, and temporary support system of the bridge erecting machine, enabling it to have greater adaptability and flexibility when crossing narrow bridges such as steel arch bridges. Specifically, the rear outriggers adopt a foldable structure, and are equipped with folding hinges to allow them to fold and retract when space is limited; the guide beam machine reduces its overall width by replacing the original wide crossbeam with a short upper crossbeam and symmetrically and rotatably equipping a set of short lifting wings on both sides; the temporary outriggers are equipped with flat hydraulic cylinders, which can achieve height adjustment, providing additional support for the bridge erecting machine and enhancing its stability.

[0006] The technical objective of this utility model is achieved through the following technical solution:

[0007] A modified bridge erecting machine capable of independently crossing rigid arch bridges includes a guide beam machine and a rear support leg located at the tail end of the main beam of the bridge erecting machine. The guide beam machine includes a guide beam body, with a short upper crossbeam at the end of the guide beam body. A set of short lifting wings are symmetrically and rotatably arranged on both sides of the short upper crossbeam. The rear support leg includes a support leg body and a foldable column, with the support leg body and the foldable column rotatably connected.

[0008] To achieve the above technical solution, a further preferred solution is: the short lifting wing includes a guide beam lifting wing and a lifting wing operating platform, the guide beam lifting wing is rotatably connected to the guide beam body, and the lifting wing operating platform is set on the side of the guide beam lifting wing.

[0009] Furthermore, based on the above technical solution, a rotating connection mechanism is provided on the upper edge of the support leg body, and a foldable column is rotatably connected to the rotating connection mechanism.

[0010] Furthermore, the rear outrigger also includes fasteners, and the lower part of the outrigger body is rotatably connected to the foldable column via the fasteners.

[0011] Furthermore, based on the above technical solution, a temporary support leg is provided between the main beam and the main support leg body. The temporary support leg is connected by upper and lower bolt flanges to form a rigid support.

[0012] Furthermore, a flat hydraulic cylinder is installed at the lower part of the temporary outrigger, which includes a cylinder seat and a hydraulic system.

[0013] By adopting the above technical solution, this utility model has the following technical effects:

[0014] By setting up foldable rear outriggers, which can be folded forward via folding hinges, the space occupied by the rear outriggers can be significantly reduced when the bridge erecting machine is in a narrow bridge construction environment such as a steel arch bridge, thus reducing the overall width and ensuring that the bridge erecting machine can pass smoothly, thereby improving the adaptability of the equipment and construction efficiency.

[0015] By setting short lifting wings and short upper crossbeams, the original wide crossbeam of the guide beam machine is transformed into a short upper crossbeam, and short lifting wings that are rotatably connected to the main body of the guide beam are set on both sides, thereby reducing the overall width of the guide beam machine, optimizing the lateral dimension design of the bridge erecting machine, and meeting the space requirements for the construction of steel arch bridges or narrow bridges.

[0016] By installing temporary outriggers and flat hydraulic cylinders, temporary outriggers are installed between the main beam and the lower connecting crossbeam. The height can be adjusted by the flat hydraulic cylinders at the bottom, which not only enhances the stability of the bridge erecting machine, but also adapts to different pier height differences, improving the flexibility and safety of construction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0018] Figure 1 This is an elevation view of the rear support leg of a modified bridge erecting machine capable of independently crossing rigid arch bridges, according to this utility model.

[0019] Figure 2 This is an elevation view of the traveling mechanism and temporary support leg of this utility model;

[0020] Figure 3 This is an elevation view of the rear support leg of this utility model in its folded state;

[0021] Figure 4 This is an elevation view of the temporary support leg of this utility model;

[0022] Figure 5 This is an elevation view of the guide beam body and the front support leg of this utility model;

[0023] Figure 6 This is a top view of the short hanging wing of this utility model;

[0024] In the diagram, 1-rear support leg; 11-support leg body; 111-rotating connection mechanism; 112-lower connecting crossbeam; 12-foldable column; 121-first column; 122-second column; 123-third column; 13-fastener; 131-rotating shaft; 132-cotter pin; 2-traveling mechanism; 3-temporary support leg; 31-flat hydraulic cylinder; 311-cylinder seat; 312-hydraulic system; 32-upper and lower bolt flanges; 321-upper bolt flange; 322-lower bolt flange; 4-folding hinge seat; 41-hinge seat; 42-hinge arm; 5-guide beam machine; 51-guide beam body; 52-short lifting wing; 521-guide beam lifting wing; 522-lifting wing operating platform; 53-front support leg; 531-ear seat; 532-rotating component; 533-support leg body; 534-hanging wheel; 535-diagonal brace. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0026] refer to Figure 1-6 This application discloses a modified bridge erecting machine capable of crossing rigid arch bridges on its own, including a guide beam machine 5 and a rear support leg 1 located at the tail end of the main beam of the bridge erecting machine. The guide beam machine 5 includes a guide beam body 51, on which the original wide crossbeam is replaced with a short upper crossbeam, and a short hanging wing 52 is provided on each side of the short upper crossbeam. The rear support leg 1 includes a support leg body 11 and a foldable column 12, and the support leg body 11 and the foldable column 12 are rotatably connected.

[0027] Specifically, in this embodiment, the bridge erecting machine being modified is a DF900 bridge erecting machine. The DF900 is a type of equipment used for railway bridge construction, characterized by high efficiency and stability. Its main structure includes a boom, outriggers, a lifting system, and a traveling system, ensuring both efficiency and safety during the construction process. The DF900 bridge erecting machine is widely used in the erection and dismantling of railway bridges and enjoys a good market reputation.

[0028] like Figure 1 The rear support leg 1 is the main load-bearing support leg of the girder erecting machine. The upper part of the rear support leg 1 is rigidly connected to the main beam flange, and it forms an "O"-shaped structure with the connecting beam at the tail of the boom. The rear support leg 1 includes a support leg body 11, a foldable column 12, and fasteners 13. The support leg body 11 includes a rotating connecting mechanism 111 and a lower connecting beam 112 located on its upper edge. The rotating connecting mechanism 111 is rotatably connected to the upper edge of the foldable column 12. The lower connecting beam 112 is the bottom support structure of the rear support leg 1. The lower connecting beam 112 is slidably connected to the guide beam machine 5, and the lower connecting beam 112 is rotatably connected to the lower part of the foldable column 12 through the fasteners 13.

[0029] Specifically, the rotating connection mechanism 111 includes a rotating connecting seat and a rotating support shaft. The rotating connecting seat is fixed to the upper edge of the outrigger body 11 by high-strength bolts or welding, and has threaded holes for mounting the rotating support shaft. The rotating connecting seat is made of wear-resistant alloy material, which has good corrosion resistance and durability.

[0030] Specifically, the rotating support shaft passes through the rotating connecting seat and connects to the mounting hole of the foldable column 12, allowing the foldable column 12 to rotate freely on the support body 11. The rotating support shaft is made of high-strength steel and is equipped with a lubrication device to ensure smooth rotation and reduce friction. To ensure that the foldable column 12 does not rotate accidentally during operation, the rotating connecting mechanism 111 is also equipped with a hydraulic locking device, which fixes the rotation angle of the foldable column 12 by a hydraulic cylinder or mechanical lock.

[0031] Specifically, the fastener 13 includes a pivot 131 and a cotter pin 132. The pivot 131 is inserted and connected to the mounting hole at the bottom of the lower connecting beam 112 and the foldable column 12. The cotter pin 132 is used to fix the pivot 131, thereby realizing the rotation and positioning of the column on the lower connecting beam 112.

[0032] like Figure 2A folding hinge seat 4 is installed on the lower connecting crossbeam 112, and is fixed to the upper part of the lower connecting crossbeam 112 by welding or high-strength bolts. This allows the auxiliary rear support leg 1 to fold forward, thereby reducing the overall width of the bridge erecting machine to accommodate the passage requirements of rigid arch bridges. The folding hinge seat 4 includes a hinge base 41 and a hinge arm 42. The hinge base 41 is installed on the lower connecting crossbeam 112. One end of the hinge arm 42 is rotatably connected to the hinge base 41 via a rotating shaft, and the other end is connected to the foldable column 12. A hydraulic drive system is installed on the hinge arm 42, which controls the rotation angle and speed of the hinge arm 42.

[0033] The hydraulic drive system mainly consists of hydraulic cylinders, a hydraulic pump, and control valves. The hydraulic cylinders are mounted on the articulated arm 42, and the hydraulic pump provides hydraulic power to drive the articulated arm 42 to rotate. The hydraulic pump adjusts the pressure of the hydraulic cylinders according to the instructions of the control valves, precisely controlling the rotation angle and speed of the articulated arm 42 to ensure the smoothness and accuracy of the folding or unfolding process of the rear outrigger 1. During folding, the hydraulic system pushes the rotation of the articulated arm 42 through the hydraulic cylinders, causing the foldable column 12 of the rear outrigger to fold forward, reducing the width of the bridge erecting machine. This ensures that the bridge erecting machine can smoothly pass over the bridge arch and is widely used in railway construction equipment such as the DF900 model bridge erecting machine.

[0034] Specifically, the foldable column 12 includes a first column 121, a second column 122 and a third column 123, which are connected in sequence from top to bottom by fasteners 13.

[0035] Specifically, the first column 121 is located at the very top of the foldable column 12, and its top edge is rotatably connected to the leg body 11 via a rotating connection mechanism 111. The bottom of the first column 121 is connected to the top of the second column 122 via a fastener 13; the second column 122 is located in the middle part of the foldable column 12, and its top is connected to the first column 121 via a fastener 13, and its bottom is connected to the third column 123 via a fastener 13.

[0036] Specifically, the third column 123 is located at the bottom of the foldable column 12. The top of the third column 123 is connected to the bottom of the second column 122 via fastener 13. The bottom of the third column 123 is connected to the lower connecting beam 112 via a pivot 131 in the fastener 13. The pivot 131 provides the third column 123 with the ability to rotate around the lower connecting beam 112. After folding, the total width of the bridge erecting machine is less than 11m.

[0037] like Figure 4 A temporary support leg 3 is provided between the main beam and the lower connecting crossbeam 112. The temporary support leg 3 is connected by upper and lower bolt flanges 32 to form a rigid support. A flat hydraulic cylinder 31 is provided at the lower part of the temporary support leg 3. The flat hydraulic cylinder 31 includes a cylinder seat 311 and a hydraulic system 312.

[0038] Specifically, the temporary support leg 3 is equipped with upper and lower bolt flanges 32 at both ends. The upper and lower bolt flanges 32 include an upper bolt flange 321 and a lower bolt flange 322 respectively located at both ends of the temporary support leg 3. The temporary support leg 3 is firmly connected to the main beam and the lower connecting crossbeam 112 through the upper and lower bolt flanges 32. The upper and lower bolt flanges 32 are fixed with high-strength bolts to form a rigid connection, which can withstand the load generated by the temporary support leg 3 during the operation of the bridge erecting machine.

[0039] Specifically, a flat hydraulic cylinder 31 is installed in the middle of the temporary outrigger 3. The structure of the flat hydraulic cylinder 31 includes a cylinder seat 311 and a hydraulic system 312. The cylinder seat 311 is fixed to the end of the temporary outrigger 3, providing support for the hydraulic system 312, and is also connected to the lower part of the lower connecting beam 112. The hydraulic system 312 includes a hydraulic cylinder body, a piston, and hydraulic lines, which can achieve precise height adjustment to adapt to different working conditions. The hydraulic system 312 drives the height change of the temporary outrigger 3.

[0040] Specifically, the temporary support leg 3 is connected by upper and lower bolt flanges 32 to form a rigid support, and its load-bearing capacity is provided by the high-strength bolts and flange structure. When the bridge erecting machine folds or adjusts the position of the rear support leg 1, the temporary support leg 3 can replace the original rear support leg 1 to provide stable support and prevent the main beam from deforming or tilting due to uneven load.

[0041] Specifically, the flat hydraulic cylinder 31 at the bottom of the temporary outrigger 3 can achieve precise height adjustment through the hydraulic system 312. Under different working conditions, such as changes in pier height or inclination of the bridge deck, the height of the hydraulic cylinder can be adjusted through the hydraulic system 312 to ensure that the bridge erecting machine is in a horizontal state.

[0042] Specifically, a traveling mechanism 2 is fixedly connected to the middle of the temporary outrigger 3. One end of the traveling mechanism 2 is fixed to the lower connecting crossbeam 112, and the other end contacts the main beam. The traveling mechanism 2 can work in conjunction with the temporary outrigger 3 to provide both movement and support for the bridge erecting machine. The rigid support structure of the temporary outrigger 3 and the traveling mechanism 2 form an integral whole. When the bridge erecting machine is stationary, the temporary outrigger 3 shares part of the load, reducing the pressure of the traveling wheels on the track or bridge deck and extending its service life.

[0043] It is worth noting that the traveling mechanism 2 consists of traveling wheels, a drive unit, a braking device, and a connecting bracket. The traveling wheels are mounted at the bottom of the traveling mechanism 2, contacting the bridge deck or track, and achieve horizontal movement of the bridge erecting machine via sliding rails. They are made of high-strength alloy materials to withstand the weight of the equipment and dynamic loads. The drive unit includes a motor, a reducer, and a drive shaft, which drives the bridge erecting machine to move forward and backward, providing both forward and reverse driving forces. The braking device is mounted on the traveling wheels to lock them and prevent slippage; it can be either mechanical or hydraulic braking.

[0044] like Figure 6 The guide beam machine 5 includes a guide beam body 51. The original wide crossbeam on the guide beam body 51 is replaced with a short upper crossbeam. A short hanging wing 52 is provided on each side of the short upper crossbeam. By replacing the original wide crossbeam with a short upper crossbeam and installing short hanging wings 52 on both sides, the short hanging wings 52 are rotatably connected to the guide beam machine body. When passing through the hole, the short hanging wings 52 are rotated, and the total width of the guide beam machine 5 is reduced, thereby meeting the passage requirements of narrow spaces such as steel arch bridges.

[0045] Specifically, the end of the short lifting wing 52 is equipped with a hinged seat, which is hinged to the end of the guide beam body via a rotating rod, allowing it to rotate around the rotating rod. The hinged seat is equipped with a high-strength bushing to reduce rotational friction and extend service life. To ensure the stability of the lifting wing at different angles, the hinged seat is equipped with a hydraulic locking device, which can lock the position of the lifting wing via a hydraulic cylinder after angle adjustment to prevent displacement. This design improves the flexibility and safety of the guide beam machine during bridge erection.

[0046] Specifically, the short lifting wing 52 includes a guide beam lifting wing 521 and a lifting wing operating platform 522, with the operating platform 522 located on the side of the guide beam lifting wing 521. The guide beam lifting wing 521 is used to support the lifting and movement of the beam segment. The guide beam lifting wing 521 is directly fixed to both sides of the short upper crossbeam, and its structure is made of high-strength materials, capable of withstanding the loads of the lifting equipment and the beam segment during construction.

[0047] It is worth noting that the lifting wing operating platform 522 is located on the side of the guide beam lifting wing 521, providing a safe and convenient operating space for construction personnel. The lifting wing operating platform 522 is fixed to the guide beam lifting wing 521 by bolts or welding, and the platform surface is covered with anti-slip material to ensure the safety of construction personnel during hoisting operations.

[0048] like Figure 5The guide beam machine 5 also includes a front support leg 53, which includes a lug 531, a rotating component 532, a support leg body 533, a hanging wheel 534, and a diagonal brace 535. The lug 531 is fixed to the front end of the guide beam body 51 by bolts or welding, providing a rotational connection point for the front support leg 53. The lug 531 and the support leg body 533 are rotatably connected by the rotating component 532, allowing the front support leg 53 to be angled according to the bridge deck elevation difference during construction. The support leg body 533 is the main load-bearing component, made of high-strength steel, and capable of bearing the weight of the guide beam machine 5 and the beam segments. The hanging wheel 534 is located at the lower part of the guide beam body 51 and is used to assist in the hoisting and positioning of the beam segments. The diagonal brace 535 connects the support leg body 533 and the guide beam body 51, increasing structural rigidity and ensuring the stability of the front support leg 53 under load.

[0049] The working process of the bridge erecting machine through the hole in this embodiment is as follows:

[0050] Ensure the connection and support of the guide beam machine 5, rear outrigger 1, temporary outrigger 3, and front outrigger 53 are in good condition. Pay special attention to checking the rear outrigger folding hinge 4, traveling mechanism 2, and guide beam lifting fin 521 to ensure they are flexible and adjustable. Operate the hydraulic system 312 and test the height adjustment function of the flat cylinder 31 to ensure precise adjustment of the outrigger height.

[0051] Start the drive unit of traveling mechanism 2 and slowly move the bridge erecting machine along the bridge track to the span area. Adjust the height of the beam segments using the main beam hoisting system of the bridge erecting machine to ensure the stability of the bridge erecting machine's center of gravity.

[0052] After unlocking the fasteners 13 of the rear outrigger 1, the folding hinge 4 is operated via a hand-operated hoist or hydraulic system, causing the foldable column 12 to fold forward around the pivot 131. The first column 121, the second column 122, and the third column 123 are folded in sequence, reducing the width of the bridge erecting machine to accommodate the passage space of the rigid arch bridge. During the folding process, the temporary outrigger 3 bears part of the load of the bridge erecting machine, ensuring overall stability.

[0053] Adjust the guide beam machine 5, rotating the short lifting wing 52 to its minimum width to ensure the overall dimensions of the bridge erecting machine meet the bridge's traffic requirements. Operate the flat hydraulic cylinder 31 to adjust the height of the temporary support legs 3, ensuring the bridge erecting machine remains stable within the confined space of the bridge arch. Continue moving forward slowly, controlling the bridge erecting machine to pass through the rigid arch bridge via the traveling mechanism 2, ensuring that no components collide.

[0054] After completing the drilling, manipulate the folding hinge 4 to gradually unfold the foldable column 12, so that the first column 121, the second column 122, and the third column 123 return to their unfolded state in sequence. Re-secure the fasteners 13 to ensure that the rear support leg 1 is stably restored to its working state. Release the height adjustment mode of the temporary support leg 3 so that it can be used as an auxiliary support again.

[0055] The bridge erecting machine moves to a new erection position, and the hoisting wheels 534 and diagonal braces 535 of the front outrigger 53 are adjusted to ensure construction stability. The hoisting and erection of the next beam continues, completing the bridge construction task.

[0056] It should be understood that the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A modified bridge erecting machine capable of self-propelled crossing of rigid arch bridges, comprising a guide beam machine (5) and a rear support leg (1) disposed at the tail end of the main beam of the bridge erecting machine, characterized in that... ； The guide beam machine (5) includes a guide beam body (51), and a short upper crossbeam is provided at the end of the guide beam body (51). A set of short lifting wings (52) are symmetrically and rotatably provided on both sides of the short upper crossbeam. The rear support leg (1) includes a support leg body (11) and a foldable column (12), and the support leg body (11) and the foldable column (12) are rotatably connected.

2. A modified self-erecting rigid frame bridge launching device according to claim 1, wherein, The short lifting wing (52) includes a guide beam lifting wing (521) and a lifting wing operating platform (522). The guide beam lifting wing (521) is rotatably connected to the guide beam body (51), and the lifting wing operating platform (522) is located on the side of the guide beam lifting wing (521).

3. The modified self-erecting rigid frame arch bridge erecting machine according to claim 1, characterized in that, A rotating connection mechanism (111) is provided on the upper edge of the support leg body (11), and a foldable column (12) is rotatably connected to the rotating connection mechanism (111).

4. The modified self-erecting rigid frame arch bridge erecting machine according to claim 1, characterized in that, The rear support leg (1) also includes a fastener (13), and the lower part of the support leg body (11) is rotatably connected to the foldable column (12) through the fastener (13).

5. A modified self-erecting rigid frame bridge erecting machine according to claim 3, wherein A temporary support leg (3) is provided between the main beam and the support leg body (11). The temporary support leg (3) is connected by upper and lower bolt flanges (32) to form a rigid support.

6. A modified self-erecting rigid frame bridge launching device according to claim 5, wherein, The temporary outrigger (3) is equipped with a flat hydraulic cylinder (31) at the bottom. The flat hydraulic cylinder (31) includes a cylinder seat (311) and a hydraulic system (312).

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