A bridge girder erection machine

Abstract

The embodiment of the application provides a bridge girder erection machine, which comprises a main girder, a first longitudinal moving trolley, a second longitudinal moving trolley, a first transverse moving trolley, a second transverse moving trolley, a front support leg, a first middle support leg, a second middle support leg, a rear support leg and a fixing assembly. The first longitudinal moving trolley and the second longitudinal moving trolley are arranged on the main girder and move along the longitudinal direction of the main girder. The first transverse moving trolley is arranged on the upper portion of the first longitudinal moving trolley, and the second transverse moving trolley is arranged on the upper portion of the second longitudinal moving trolley. The front support leg is installed at the front end of the main girder and connected with a pier through the fixing assembly. The rear support leg is movably installed at the rear end of the main girder. The first middle support leg and the second middle support leg are movably installed on the main girder and between the front support leg and the rear support leg. The first middle support leg is close to the front support leg, and the second middle support leg is close to the rear support leg. The first middle support leg and the second middle support leg are used for supporting the main girder when the main girder moves. The bridge girder erection machine described above can complete the task of transporting the steel girder from the tail of the bridge girder erection machine to the front of the bridge girder erection machine to realize the tasks of girder falling and hole passing.

Description

Technical Field

[0001] This application relates to the field of bridge erection equipment technology, specifically to a bridge erecting machine. Background Technology

[0002] A bridge erecting machine is a device that places prefabricated bridge beams onto bridge piers; it falls under the category of cranes. Bridge erecting machines are suitable for erecting highway bridges, conventional railway bridges, and high-speed passenger railway bridges. A single-span steel beam is a steel beam prefabricated in a factory and then assembled on-site to form a complete structure. Single-span steel beams are long, wide, and heavy. Existing double-guide beam bridge erecting machines used for highway single-span bridge construction can only meet the erection requirements of highway T-beams and cannot meet the construction requirements of erecting single-span steel beams. Summary of the Invention

[0003] In view of the above problems, this application provides a bridge erecting machine that overcomes or at least partially solves the above problems.

[0004] This application provides a bridge erecting machine, which includes: a main beam, a first longitudinal moving trolley, a second longitudinal moving trolley, a first transverse moving trolley, a second transverse moving trolley, a front support leg, a first middle support leg, a second middle support leg, a rear support leg, and a fixing assembly.

[0005] The main beam is equipped with a first longitudinal moving trolley and a second longitudinal moving trolley that move along the longitudinal direction of the main beam. The first transverse moving trolley is located on the upper part of the first longitudinal moving trolley, and the second transverse moving trolley is located on the upper part of the second longitudinal moving trolley.

[0006] The front support leg is installed at the front end of the main beam and connected to the pier through a fixing component. The rear support leg is movably installed at the rear end of the main beam. The first and second middle support legs are movably installed on the main beam between the front and rear support legs. The first middle support leg is closer to the front support leg, and the second middle support leg is closer to the rear support leg.

[0007] The first and second intermediate support legs are used to support the main beam when it moves.

[0008] In one alternative configuration, a two-point lifting device is installed at the bottom of the first transverse trolley, and the height of the lifting platform of the two-point lifting device is lower than the height of the first longitudinal trolley in the direction of gravity. A one-point lifting device is installed at the bottom of the second transverse trolley, and the height of the lifting platform of the one-point lifting device is lower than the height of the second longitudinal trolley in the direction of gravity.

[0009] In one alternative embodiment, the central pivot of the front outrigger is located at the middle position of the front outrigger, and the front outrigger includes a first height adjustment device, wherein...

[0010] The first height adjustment device is connected to the fixed assembly and is used to adjust the height of the front outrigger to facilitate its connection with the fixed assembly.

[0011] In one alternative embodiment, the rear outrigger includes an adjustment device, a second height adjustment device, and a first support mechanism, wherein...

[0012] In the direction of gravity, the adjustment device, the second height adjustment device, and the first support mechanism are connected in sequence from top to bottom.

[0013] In one alternative approach, the relative front-to-back positions of the first and second middle legs remain unchanged, and their front-to-back positions are not interchanged during movement.

[0014] In one alternative embodiment, the first outrigger includes a first idler wheel drive device, a first support roller drive device, a first lateral adjustment device, and a second support mechanism; the second outrigger includes a second idler wheel drive device, a second support roller drive device, a second lateral adjustment device, and a third support mechanism.

[0015] In the direction of gravity, the first idler wheel drive device, the first support wheel drive device, the first lateral adjustment device and the second support mechanism are connected in sequence from top to bottom;

[0016] In the direction of gravity, the second idler wheel drive device, the second support wheel drive device, the second lateral adjustment device, and the third support mechanism are connected sequentially from top to bottom.

[0017] In one alternative embodiment, a first drive wheel is used to control the first middle outrigger to move back and forth automatically to adjust its position; a second drive wheel is used to control the second middle outrigger to move back and forth automatically to adjust its position.

[0018] Both the first and second roller drive devices are used to control the longitudinal forward and backward movement of the main beam to achieve the function of passing through the hole.

[0019] Both the first and second lateral adjustment devices are hydraulic cylinders used to drive the main beam to move laterally left and right, in order to meet the needs of curved construction.

[0020] Both the second and third support mechanisms are supported by hydraulic cylinders.

[0021] In one alternative configuration, when the first and second intermediate supports support the main beam, their respective heights can be adjusted according to the longitudinal and transverse slopes.

[0022] In one alternative configuration, the main beam includes an upper chord, a lower chord, and web members. The upper and lower chords are connected by web members, and the main beam remains horizontal throughout the process of passing through the span and erecting the steel beam.

[0023] In one alternative approach, when the bridge erecting machine is crossing the span and erecting the steel beams, the distance between the rear outrigger and the front outrigger is greater than the length of the two spans of beams.

[0024] The bridge erecting machine described in this embodiment can lift a whole span of steel beam from the rear of the machine to the front for lowering and crossing of the span. To adapt to the longitudinal slope of the bridge under construction, the front outrigger, first middle outrigger, second middle outrigger, and rear outrigger are all height-adjustable, ensuring the main beam remains horizontal. During lowering and crossing, the distance between the rear outrigger and the front outrigger is greater than the length of the two spans of beam, and all outriggers are positioned near the piers, resulting in good bridge stress distribution and high safety. The bridge erecting machine provided in this embodiment is particularly suitable for erecting whole spans of steel beams in highway bridges and is also applicable to curved conditions.

[0025] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of the front view of a bridge erecting machine according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the main beam structure of a bridge erecting machine according to an embodiment of this application.

[0029] Figure 3 This is a side view of the front support leg of a bridge erecting machine according to an embodiment of this application.

[0030] Figure 4 This is a side view of the rear support leg of a bridge erecting machine according to an embodiment of this application.

[0031] Figure 5 This is a side view of the first middle support leg of a bridge erecting machine according to an embodiment of this application.

[0032] Figure 6 This is a side view of the second middle support leg of a bridge erecting machine according to an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the tail beam state of a bridge erecting machine according to an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of the front beam-laying state of a bridge erecting machine according to an embodiment of this application.

[0035] Figure 9 This is a schematic diagram of the first step of a bridge erecting machine passing through a hole, according to an embodiment of this application.

[0036] Figure 10 This is a schematic diagram of the second step of a bridge erecting machine passing through a hole, according to an embodiment of this application.

[0037] Figure 11 This is a schematic diagram of the third step of the bridge erecting machine passing through a hole, according to an embodiment of this application. Detailed Implementation

[0038] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0040] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0041] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the bridge erecting machine of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. 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. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the descriptions of directions such as the X, Y, and Z directions used to illustrate the operation and construction of the components of a bridge erecting machine in this embodiment are not absolute but relative. Although these directions are appropriate when the components of the battery pack are in the positions shown in the figure, they should be interpreted differently when these positions change to correspond to the changes.

[0045] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0046] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0047] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is connected; it can also refer to the internal connection of two components. Signal connection can refer not only to signal connection through a circuit but also to signal connection through a media, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] Please see Figure 1 This is a structural schematic diagram of the front view of a bridge erecting machine according to an embodiment of this application, as shown below. Figure 1 As shown, the bridge erecting machine includes a main beam 1, a first longitudinal moving trolley 21, a second longitudinal moving trolley 22, a first transverse moving trolley 31, a second transverse moving trolley 32, a front support leg 4, a first middle support leg 9, a second middle support leg 8, a rear support leg 7, and a fixing assembly 6. This bridge erecting machine is suitable for erecting whole-span steel beams in highway bridges and is also suitable for construction on curved sections.

[0049] Understandable. Figure 1 The structure shown is for illustrative purposes only; the actual structure may include more components. Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0050] In this embodiment, the bridge erecting machine is used to erect bridges on the first pier A1, the second pier A2, and the third pier A3. A first longitudinal moving trolley 21 and a second longitudinal moving trolley 22 are installed on the main beam 1. A first transverse moving trolley 31 is located above the first longitudinal moving trolley 21, and a second transverse moving trolley 32 is located above the second longitudinal moving trolley 22. A front support leg 4 is installed at the front end of the main beam 1. The front support leg 4 is anchored to the third pier A3 via a fixing component 6. The anchoring connection is achieved by extending the fixing component 6 a certain distance into the third pier A3. A movable rear support leg 7 is installed at the rear end of the main beam 1. A first middle support leg 9 and a second middle support leg 8 are movably installed on the main beam 1, positioned between the front support leg 4 and the rear support leg 7. The first middle support leg 9 is closer to the front support leg 4, and the second middle support leg 8 is closer to the rear support leg 7. The relative front-to-back positions of the first middle support leg 9 and the second middle support leg 8 remain unchanged and do not alternate during movement.

[0051] The main beam 1 includes an upper chord 11, a lower chord 12, and web members 13, as shown in the figure. Figure 2 As shown, the upper chord 11 and the lower chord 12 are connected by the web member 13. The main beam 1 remains horizontal throughout the process of passing through the hole and erecting the steel beam 10.

[0052] A side view diagram of the front support leg 4 is shown below. Figure 3 As shown, the central pivot 42 of the front outrigger 4 is located in the middle of the front outrigger 4. The front outrigger 4 includes a first height adjustment device 41 and a fixing component 6 is an anchoring component. The first height adjustment device 41 is anchored to the fixing component 6. The central pivot 42 can adapt to curved working conditions. The first height adjustment device 41 is used to adjust the height of the front outrigger 4 to an appropriate position so that the front outrigger 4 can be easily connected to the fixing component 6.

[0053] A side view of the rear support leg 7 is shown in the diagram. Figure 4 As shown, the rear outrigger 7 includes an adjusting device 71, a second height adjusting device 72, and a first support mechanism 73. In the direction of gravity, the adjusting device 71 is above, the first support mechanism 73 is below, and the second height adjusting device 72 is located between the adjusting device 71 and the first support mechanism 73. The adjusting device 71, the second height adjusting device 72, and the first support mechanism 73 are connected sequentially. The adjusting device 71 is used to adjust the position of the rear outrigger 7, for example, adjusting the rear outrigger 7 to different positions along the direction of the main beam 1. The second height adjusting device 72 is used to adjust the height of the rear outrigger 7, ensuring that the height of the rear outrigger 7 is at a suitable height during bridge erection, for example, adjusting the height of the rear outrigger 7 and the height of other outriggers so that the main beam 1 remains horizontal. The first support mechanism 73 is used to support the rear outrigger 7.

[0054] A side view of the first support leg 9 is shown in the diagram below. Figure 5 As shown, the first middle support leg 9 includes a first idler wheel drive device 91, a first support roller drive device 92, a first lateral adjustment device 93, and a second support mechanism 94. In the direction of gravity, the first idler wheel drive device 91 is at the top, and the second support mechanism 94 is at the bottom. The first support roller drive device 92 is close to the first idler wheel drive device 91, and the first lateral adjustment device 93 is close to the second support mechanism 94. The first idler wheel drive device 91, the first support roller drive device 92, the first lateral adjustment device 93, and the second support mechanism 94 are connected in sequence.

[0055] The first roller drive device 91 controls the first middle support leg 9 to move back and forth automatically, adjusting its position, for example, adjusting it to different positions along the direction of the main beam 1. The first support roller drive device 92 uses a motor to drive the support roller, controlling the longitudinal back and forth movement of the main beam 1 to achieve the function of passing through holes. The first lateral adjustment device 93 uses a hydraulic cylinder to drive the main beam 1 to move laterally left and right, and together with the central rotating shaft 42 of the front support leg 4, it can meet the needs of curved construction. The second support mechanism 94 uses hydraulic cylinder support.

[0056] A side view of the second support leg 8 is shown in the diagram below. Figure 6 As shown, the second middle support leg 8 includes a second idler wheel drive device 81, a second support wheel drive device 82, a second lateral adjustment device 83, and a third support mechanism 84. In the direction of gravity, the second idler wheel drive device 81 is at the top, and the third support mechanism 84 is at the bottom. The second support wheel drive device 82 is close to the second idler wheel drive device 81, and the second lateral adjustment device 83 is close to the third support mechanism 84. The second idler wheel drive device 81, the second support wheel drive device 82, the second lateral adjustment device 83, and the third support mechanism 84 are connected in sequence.

[0057] The second roller drive device 81 controls the second middle support leg 8 to move back and forth automatically, adjusting its position, for example, adjusting it to different positions along the direction of the main beam 1. The second support roller drive device 82 uses a motor to drive the support roller, controlling the longitudinal back and forth movement of the main beam 1 to achieve the function of passing through holes. The second lateral adjustment device 83 uses a hydraulic cylinder to drive the main beam 1 to move laterally left and right, and, together with the central rotating shaft 42 of the front support leg 4, can meet the needs of curved construction. The third support mechanism 84 uses hydraulic cylinder support.

[0058] The first middle support leg 9 and the second middle support leg 8 are used to support the main beam 1 when it moves. When the first middle support leg 9 and the second middle support leg 8 are used to support the main beam 1, the height of the first middle support leg 9 and the second middle support leg 8 can be adjusted according to the longitudinal slope and transverse slope, so that the main beam 1 remains horizontal during the process of passing through the hole and erecting the steel beam 10.

[0059] The bottom of the first transverse trolley 31 is equipped with a two-point lifting device 310, which is as follows: Figure 5 As shown, and in the direction of gravity, the height of the lifting platform of the two-point lifting device 310 is lower than the height of the first longitudinal moving trolley 21. A single-point lifting device 320 is installed at the bottom of the second transverse moving trolley 32, and the single-point lifting device 320 is as follows... Figure 6 As shown, in the direction of gravity, the height of the lifting platform of the single-point lifting device 320 is lower than the height of the second longitudinal trolley. The single-point lifting device 320 and the two-point lifting device 310 together achieve "four-point lifting and three-point balance", which can ensure that the force on each lifting point is uniform.

[0060] Both the first transverse trolley 31 and the second transverse trolley 32 are driven by motors. The first transverse trolley 31 can move laterally along the track on the first longitudinal trolley 21, which is parallel to the main beam 1. The second transverse trolley 32 can move laterally along the track on the second longitudinal trolley 22. The first transverse trolley 31 and the second transverse trolley 32 can move the steel beam 10 laterally and adjust its position. The first longitudinal trolley 21 and the second longitudinal trolley 22 are used for longitudinally lifting the steel beam 10, which is perpendicular to the main beam 1.

[0061] When the bridge erecting machine is working, it has two working states: lowering beams and crossing spans. Figures 7-11 As shown. Among them, Figure 7 and Figure 8 This is a diagram illustrating the bridge erecting machine's completion of beam lowering operations. Figure 9 , Figure 10 and Figure 11 This is a diagram showing the bridge erecting machine completing its work across the span.

[0062] When the bridge erecting machine is in the process of lowering the bridge beam, such as Figure 7 The diagram shows the tail beam lifting state of the bridge erecting machine. When the bridge erecting machine enters the tail beam lifting working state, the front support leg 4 is anchored to the third pier A3 through the fixing component 6; the first middle support leg 9 and the second middle support leg 8 are used to support the main beam 1; the rear support leg 7 retracts its support cylinder and is suspended below the main beam 1. The first longitudinal trolley 21 uses the two-point lifting device 310 installed at the bottom of the first transverse trolley 31 set on the upper part to lift the steel beam 10. Neither the first transverse trolley 31 nor the two-point lifting device 310 installed at its bottom are in operation. Figure 7 The winning bidder determined that the second longitudinal trolley 22 would use a single-point lifting device 320 installed at the bottom of the upper-mounted second transverse trolley 32 to lift the steel beam 10. However, neither the second transverse trolley 32 nor the single-point lifting device 320 installed at its bottom were... Figure 7The bid was successful. The single-point lifting device 320 and the two-point lifting device 310 work in coordination to achieve "four-point lifting and three-point balancing," lifting the steel beam 10 from both ends and moving it from the tail of the bridge erecting machine along the main beam 1 towards the forward support leg 4; among which, Figure 7 The direction of the middle arrow is the direction of movement L, which is along the bridge-building direction.

[0063] like Figure 8 The diagram shows the front section of the bridge erecting machine. The first longitudinal moving trolley 21 and the second longitudinal moving trolley 22 lift the steel beam 10 from the rear of the bridge erecting machine and move it to a designated position, such as the front support leg 4. Simultaneously, depending on the required beam placement, the first transverse moving trolley 31 and the second transverse moving trolley 32 can be used to move the steel beam 10 laterally, adjusting the placement position. Once the placement position is confirmed to be correct and appropriate, the beam placement begins. During the beam placement process, the front support leg 4 is under heavy load. During the erection of the steel beam 10, the distance between the rear support leg 7 and the front support leg 4 is greater than the length of the two spans of the beam. During the erection of the steel beam 10, the main beam 1 remains horizontal. This is achieved through the coordinated work of the front support leg 4, the first middle support leg 9, the second middle support leg 8, and the rear support leg 7, adjusting their respective heights to maintain the main beam 1's horizontal position.

[0064] When the bridge erecting machine is in the working state of passing through the span, such as Figure 9 The diagram shows the first step of the bridge erecting machine's passage through the span. After the beam is lowered, the machine prepares to pass through the span. Using the support cylinders of the first and second middle support legs 9 and 8, the entire machine is lifted upwards to a designated height, with the lifting direction H pointing upwards. Figure 9 As shown.

[0065] like Figure 10 The diagram shows the second step of the bridge erecting machine passing through the arch, supporting the rear outrigger 7; the first middle outrigger 9 is driven to a designated position by the first pulley drive device 91, for example, as shown. Figure 9 and Figure 10 As shown, the first middle support leg 9 is moved from near the second pier A2 to near the third pier A3; the second middle support leg 8 is moved to a designated position using the second wheel drive device 81, for example, as... Figure 9 and Figure 10 As shown, the second middle support leg 8 is moved from near the first pier A1 to near the second pier A2; wherein, the relative front and rear positions of the first middle support leg 9 and the second middle support leg 8 remain unchanged during the movement, that is, the front and rear positions of the first middle support leg 9 and the second middle support leg 8 are not interchanged; the connection between the front support leg 4 and the fixing component 6 is removed.

[0066] like Figure 11The diagram shows the third step of the bridge erecting machine's passage through the span, with the rear support leg 7 retracted; the first middle support leg 9, driven by the first roller drive device 92, and the second middle support leg 8, driven by the second roller drive device 82, jointly drive the main beam 1 forward. The direction of movement L of the main beam 1 is as follows: Figure 11 The direction of the middle arrow indicates that the first longitudinal moving trolley 21 and the second longitudinal moving trolley 22 move backward synchronously, meaning that the first longitudinal moving trolley 21 and the second longitudinal moving trolley 22 move in the same direction. Figure 11 The arrows point in opposite directions, indicating the span is in place; anchor the front support leg 4. During the span crossing process, the distance between the rear support leg 7 and the front support leg 4 is greater than the length of the two spans of the beam. Throughout the span crossing process, the main beam 1 remains horizontal. This can be achieved by coordinating the work of the front support leg 4, the first middle support leg 9, the second middle support leg 8, and the rear support leg 7 to adjust their respective heights, thus maintaining the horizontal position of the main beam 1. With the span crossing completed, the bridge erecting machine prepares to erect the next span of steel beam 10.

[0067] In summary, the bridge erecting machine described above can complete the task of hoisting a whole span of steel beam from the rear of the machine to the front for lowering and erecting the beam. To adapt to the longitudinal slope of the bridge under construction, the front outrigger, first middle outrigger, second middle outrigger, and rear outrigger are all height-adjustable, ensuring the main beam remains horizontal. During beam lowering and crossing, the distance between the rear and front outriggers is greater than the length of the two spans of beam, and each outrigger is positioned near the piers, resulting in good bridge stress distribution and high safety. The coordinated operation of the single-point and two-point lifting devices achieves "four-point lifting and three-point balancing," ensuring uniform stress distribution at each lifting point. The bridge erecting machine provided in this embodiment is particularly suitable for erecting whole spans of steel beams in highway bridges, and is also applicable to curved conditions. It has the advantages of simple operation, high efficiency, high safety, and low cost, making it easy to promote.

[0068] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0069] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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. Such 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 this application.

Claims

1. A bridge erecting machine, characterized in that, The bridge erecting machine includes: a main beam, a first longitudinal moving trolley, a second longitudinal moving trolley, a first transverse moving trolley, a second transverse moving trolley, a front support leg, a first middle support leg, a second middle support leg, a rear support leg, and a fixing assembly. The main beam is equipped with a first longitudinal trolley and a second longitudinal trolley that move longitudinally along the main beam. The first transverse trolley is located on the upper part of the first longitudinal trolley, and the second transverse trolley is located on the upper part of the second longitudinal trolley. A two-point lifting device is installed at the bottom of the first transverse trolley, and in the direction of gravity, the height of the lifting platform of the two-point lifting device is lower than the height of the first longitudinal trolley. A one-point lifting device is installed at the bottom of the second transverse trolley, and in the direction of gravity, the height of the lifting platform of the one-point lifting device is lower than the height of the second longitudinal trolley. The two-point lifting device and the one-point lifting device work in coordination to ensure that the force on each lifting point is uniform. The front support leg is installed at the front end of the main beam and connected to the pier through the fixing component. The central pivot of the front support leg is located in the middle of the front support leg. The rear support leg is movably mounted on the rear end of the main beam, and the first middle support leg and the second middle support leg are movably mounted on the main beam between the front support leg and the rear support leg, with the first middle support leg close to the front support leg and the second middle support leg close to the rear support leg. The first middle support leg includes a first hanging wheel drive device, a first supporting wheel drive device, a first lateral adjustment device, and a second support mechanism. In the direction of gravity, the first hanging wheel drive device, the first supporting wheel drive device, the first lateral adjustment device, and the second support mechanism are connected sequentially from top to bottom. The second middle support leg includes a second hanging wheel drive device, a second support wheel drive device, a second lateral adjustment device, and a third support mechanism. In the direction of gravity, the second hanging wheel drive device, the second support wheel drive device, the second lateral adjustment device, and the third support mechanism are connected sequentially from top to bottom. The first and second middle support legs are used to support the main beam when the main beam moves; The first gear drive device is used to control the first middle outrigger to move back and forth automatically and adjust its position; the second gear drive device is used to control the second middle outrigger to move back and forth automatically and adjust its position. Both the first and second roller drive devices are used to control the longitudinal forward and backward movement of the main beam to achieve the function of passing through the hole; Both the first and second lateral adjustment devices are used to drive the hydraulic cylinders that move the main beam laterally left and right. The central rotating shaft, the first lateral adjustment device, and the second lateral adjustment device cooperate with each other to meet the needs of curved construction. Both the second support mechanism and the third support mechanism are supported by hydraulic cylinders.

2. The bridge erecting machine according to claim 1, characterized in that, The front outrigger includes a first height adjustment device, wherein... The first height adjustment device is connected to the fixing component and is used to adjust the height of the front outrigger to facilitate its connection with the fixing component.

3. The bridge erecting machine according to claim 1, characterized in that, The rear support leg includes an adjustment device, a second height adjustment device, and a first support mechanism, wherein... In the direction of gravity, the adjustment device, the second height adjustment device, and the first support mechanism are connected sequentially from top to bottom.

4. The bridge erecting machine according to claim 1, characterized in that, The relative front and rear positions of the first and second middle support legs remain unchanged, and their front and rear positions are not interchanged during the movement.

5. The bridge erecting machine according to claim 4, characterized in that, When the first and second middle support legs support the main beam, their respective heights can be adjusted according to the longitudinal and transverse slopes.

6. The bridge erecting machine according to claim 1, characterized in that, The main beam includes an upper chord, a lower chord, and web members. The upper chord and the lower chord are connected by the web members. The main beam remains horizontal throughout the process of passing through the hole and erecting the steel beam.

7. The bridge erecting machine according to claim 1, characterized in that, When the bridge erecting machine is passing through the span and erecting steel beams, the distance between the rear support leg and the front support leg is greater than the length of the two span beams.

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