Middle supporting leg and bridge girder erection machine
By setting an adjustable walking mechanism on the support body in the bridge staircase, the problem that the existing bridge staircase cannot change the wheel width is solved, and the scope of application is expanded to meet the erection needs of different bridge widths.
Patent Information
- Application Number
- CN202422205183.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing bridge stairs cannot change the width between the wheels on both sides, resulting in a small scope of application and cannot meet the erection needs of bridges of different widths.
A middle leg is designed, including a support body and a walking mechanism, and a first and second mounting seats arranged in groups on the support body, and the walking mechanism can be optionally connected to the mounting of a single-line or double-line box beam by adjusting the oil cylinder and the support frame to adjust the width of the walking mechanism to adapt to the installation of a single-line or double-line box beam.
The adjustment of the distance between the walking mechanisms is achieved, the scope of application of the bridge stairs is expanded, and the erection needs of bridges of different widths can be met.
Smart Images
Figure CN223061466U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge erecting machines, in particular to an intermediate support leg and a bridge erecting machine. Background Technique
[0002] In the construction of transportation infrastructure, bridge construction is often the key control project of the whole construction project. Especially for high-speed railways and highway bridges in China, they account for a large proportion in the whole construction line. At present, the total length of high-speed railway bridges that have been built and are under construction accounts for more than 50% of the line length on average. Sometimes, in a construction section, the proportion of bridges even reaches more than 80%. To improve the prefabrication level and construction efficiency of high-speed bridge and railway bridge construction, the pre-stressed concrete simply supported box girder and prefabrication and erection construction mode are generally adopted for high-speed railways and highway bridges in China. Therefore, a large number of large construction equipment such as bridge erecting machines are needed. The 40m simply supported box girder can limitedly reduce the number of high piers, the amount of pile foundation works and the demolition cost for working conditions such as crossing high mountains and deep valleys and other adverse geological conditions and working conditions such as passing through towns and urban areas, making the railway route selection more flexible, less restricted, economically reasonable and safer.
[0003] In the related technology, during continuous bridge erection operations, the bridge erecting machine needs to move forward along the paved bridge road surface or ground. Therefore, it is required that the lower part of the second column has the characteristic of being able to slide on the bridge or ground surface. Generally, wheels are arranged under the existing second column. When facing box girders with different widths, the width between the wheels on both sides needs to be different to effectively support the second column and the box girder. However, the existing bridge erecting machine cannot change the width between the wheels on both sides, so the applicable range is small. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an intermediate support leg and a bridge erecting machine, so as to solve the technical problem in the existing technology that the width between the wheels on both sides cannot be changed and the applicable range is small.
[0005] To solve the above technical problem, the utility model provides an intermediate support leg, which includes a support main body and a traveling mechanism installed on the support main body. A group of first mounting seats and a group of second mounting seats are arranged on the support main body. The first mounting seats and the second mounting seats are arranged at intervals along the length direction of the support main body. Each group of the first mounting seats includes symmetrically arranged first mounting blocks, and each group of the second mounting seats includes symmetrically arranged second mounting blocks. The distance between the symmetrically arranged first mounting blocks is greater than the distance between the symmetrically arranged second mounting blocks. The traveling mechanism is selectively connected to the first mounting blocks and the second mounting blocks.
[0006] In an alternative embodiment, each group of the first mounting seats includes at least two first mounting blocks arranged at intervals along the width direction of the support main body;
[0007] Each of the second mounting seats includes at least two of the second mounting blocks spaced apart along the width direction of the support body.
[0008] In an alternative embodiment, a connection space is provided on the support body. In the connection space, each of the first mounting seats is provided with two sets of the first mounting blocks symmetrically arranged. Each set of the first mounting blocks includes two of the first mounting blocks arranged oppositely;
[0009] In the connection space, each of the second mounting seats is provided with two sets of the second mounting blocks symmetrically arranged. Each set of the second mounting blocks includes two of the second mounting blocks arranged oppositely;
[0010] The distance between two of the first mounting blocks arranged oppositely, or between two of the second mounting blocks arranged oppositely, gradually decreases in a direction away from the ground.
[0011] In an alternative embodiment, the traveling mechanism includes traveling wheels and a support frame;
[0012] One end of the support frame is detachably connected to the support body. The traveling wheels are rotatably connected to the support frame and are arranged away from the support body.
[0013] In an alternative embodiment, the traveling mechanism further includes an adjusting oil cylinder;
[0014] The adjusting oil cylinder is fixed on the support frame. The telescopic end of the adjusting oil cylinder is rotatably connected to the traveling wheel. The adjusting oil cylinder can drive the traveling wheel to approach or move away from the support body.
[0015] In an alternative embodiment, the traveling mechanism further includes a support platform;
[0016] The support platform is arranged between adjacent support frames. The support platform is connected to the support body and is used for supporting the support body.
[0017] In an alternative embodiment, the traveling mechanism further includes a column;
[0018] One end of the column is connected to the support body, and the other end is connected to the support platform. The column and the support platform are arranged with their axes coincident.
[0019] In an alternative embodiment, the traveling mechanism further includes a lever block;
[0020] The lever block is arranged on the column. The column is threadedly connected to the support body. The lever block can drive the column to rotate relative to the support body so that the support platform approaches or moves away from the support body.
[0021] In an optional embodiment, the walking mechanism further includes a track sweeping plate, one of which is disposed on each of the support frames, the track sweeping plate being disposed on one side of the walking wheel, and the track sweeping plate being used to sweep the moving path of the walking wheel.
[0022] The utility model also provides a bridge erecting machine, comprising the middle supporting leg.
[0023] The utility model provides a middle support leg, including a support body and a walking mechanism installed on the support body, wherein a group of first mounting seats and a group of second mounting seats are arranged on the support body, and the first mounting seats and the second mounting seats are arranged at intervals along the length direction of the support body, each group of first mounting seats includes a symmetrically arranged first mounting block, and each group of second mounting seats includes a symmetrically arranged second mounting block, and the walking mechanism is selectively connected to the first mounting block and the second mounting block. When erecting a single-line box girder, the walking mechanism can be installed on the second mounting block, and when erecting a double-line box girder, the walking mechanism is installed on the first mounting block to enable the walking mechanism to bear better load, thereby solving the technical problem in the prior art that the width between the wheels on both sides of the support body cannot be changed, resulting in a small application range of the bridge erecting machine, and achieving the goal that the spacing between the walking mechanisms on the support body can be adjusted, so that the bridge erecting machine can meet the erection of bridges of different widths. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a partial structural schematic diagram of the middle leg mentioned in the embodiment of the utility model;
[0025] Figure 2 for Figure 1 A cross-sectional view of
[0026] Figure 3 for Figure 1 A top view of
[0027] Figure 4 It is a structural schematic diagram of the middle outrigger and the bridge erecting machine mentioned in the embodiment of the utility model;
[0028] Figure 5 It is a schematic structural diagram of the middle leg mentioned in the embodiment of the utility model.
[0029] In the figure, 1-erection beam; 2-upper beam; 3-lower beam; 4-telescopic vertical beam; 5-first mounting block; 6-second mounting block; 7-connecting space; 8-traveling wheel; 9-support frame; 10-adjusting cylinder; 11-support platform; 12-column; 13-pull block; 14-track sweeping plate. DETAILED DESCRIPTION
[0030] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0032] In the related art, the bridge erecting machine needs to move forward along the laid bridge road surface or ground during continuous bridge erection operations. Therefore, it is required that the lower part of the second column has the characteristic of being able to slide on the bridge or ground surface. Generally, wheels are arranged under the existing second column. When facing box girders with different widths, the width between the wheels on both sides needs to be different to effectively support the second column and the box girder. However, the existing bridge erecting machine cannot change the width between the wheels on both sides, and the applicable range is small.
[0033] In view of this, as Figures 1 - 5 shown, some embodiments of the present utility model provide a middle support leg, including a support main body and a traveling mechanism installed on the support main body. A group of first mounting seats and a group of second mounting seats are arranged on the support main body. The first mounting seats and the second mounting seats are arranged at intervals along the length direction of the support main body. Each group of first mounting seats includes symmetrically arranged first mounting blocks 5, and each group of second mounting seats includes symmetrically arranged second mounting blocks 6. The distance between the symmetrically arranged first mounting blocks 5 is greater than the distance between the symmetrically arranged second mounting blocks 6. The traveling mechanism is selectively connected to the first mounting blocks 5 and the second mounting blocks 6.
[0034] In the above embodiment, the support main body includes an upper beam 2, a lower beam 3, and a telescopic vertical beam 4. The two ends of the upper beam 2 are respectively connected to the lower beam 3 through a telescopic vertical beam 4. The length of the telescopic vertical beam 4 can be adjusted so that the lower beam 3 can move in a direction close to or away from the upper beam 2; the upper beam 2 is slidably connected to the load-sharing beam; the upper beam 2, the lower beam 3, and the telescopic vertical beam 4 are respectively made of metal materials. The upper beam 2 and the lower beam 3 are both provided with bent portions close to each other, and the upper beam 2 and the lower beam 3 are respectively symmetrically arranged with respect to the vertical axis. The two end faces of the upper beam 2 are respectively connected to the lower beam 3 through a telescopic vertical beam 4, so that the distance between the upper beam 2 and the lower beam 3 can be adjusted. Thus, the lower beam 3 can be moved upward toward the upper beam 2 through the telescopic vertical beam 4, resulting in the lower beam 3 being lifted.
[0035] In the above embodiments, the distance between the two symmetrically arranged first mounting blocks 5 is greater than the distance between the symmetrically arranged second mounting blocks 6, so that when the traveling mechanism selects to mount the first mounting seat or the second mounting seat, the width of the traveling mechanism after installation can be different. Among them, the first mounting seat may include an even number of first mounting blocks 5. Exemplarily, the first mounting seat may include two first mounting blocks 5 or four first mounting blocks 5. The two first mounting blocks 5 may be symmetrically arranged on the lower beam 3 relative to the midline of the lower beam 3. The second mounting seat may also be arranged on the same plane as the first mounting seat. The second mounting seat may also include an even number of second mounting blocks 6. Exemplarily, there are two second mounting blocks 6. The two second mounting blocks 6 may be symmetrically arranged on the lower beam 3 relative to the midline of the lower beam 3, and the width between the two second mounting blocks 6 is less than the width between the two first mounting blocks 5, so that the traveling mechanism can be selectively connected to the two first mounting blocks 5 or connected to the two second mounting blocks 6 to face laying conditions of different widths.
[0036] In an alternative embodiment, each group of first mounting seats includes at least two first mounting blocks 5 arranged at intervals along the width direction of the support body; each group of second mounting seats includes at least two second mounting blocks 6 arranged at intervals along the width direction of the support body.
[0037] In the above embodiments, along the width direction of the support body, that is, along the length direction of the lower beam 3, a plurality of first mounting blocks 5 are respectively arranged on both sides of a plurality of second mounting blocks 6. The plurality of first mounting blocks 5 are symmetrically arranged along the midline of the lower beam 3, and the plurality of second mounting blocks 6 are also symmetrically arranged along the midline of the lower beam 3. So that when the traveling mechanism is selectively mounted on the symmetric first mounting blocks 5, the total width of the traveling mechanism is wider, and thus it is suitable for the erection support of double-line box girders. When the traveling mechanism is mounted on the symmetric second mounting blocks 6, the total width of the traveling mechanism is narrower, and thus it is suitable for the erection support of single-line box girders. Therefore, when facing the erection of single-line bridges or double-line bridges, the traveling mechanism can be selectively fixed on the second mounting blocks 6 or the first mounting blocks 5.
[0038] In an alternative embodiment, a connection space 7 is provided on the support body. Each group of first mounting seats is provided with two groups of symmetrically arranged first mounting blocks 5 in the connection space 7. Each group of first mounting blocks 5 includes two relatively arranged first mounting blocks 5; each group of second mounting seats is provided with two groups of symmetrically arranged second mounting blocks 6 in the connection space 7. Each group of second mounting blocks 6 includes two relatively arranged second mounting blocks 6; the distance between the two relatively arranged first mounting blocks 5 or the two relatively arranged second mounting blocks 6 gradually decreases in the direction away from the ground.
[0039] In the above embodiments, the distance between the two relatively arranged first mounting blocks 5 or the two relatively arranged second mounting blocks 6 gradually decreases in the direction pointing to the upper beam 2. A connecting space 7 is provided on the lower beam 3. The connecting space 7 is arranged along its length direction and penetrates the lower beam 3 in the vertical direction. The cross-section of the connecting space 7 is rectangular. The connecting space 7 has four inner walls, two inner walls extend along the length direction of the lower beam 3, and the other two inner walls extend along the width direction of the lower beam 3. Among them, on the two inner walls extending along the length direction of the lower beam 3, two first mounting blocks 5 and two second mounting blocks 6 are arranged on each inner wall. The two relatively arranged first mounting blocks 5 on the two inner walls are symmetrically arranged respectively, and the two relatively arranged second mounting blocks 6 on the two inner walls are symmetrically arranged respectively, so that the four first mounting blocks 5 are arranged in a matrix in the connecting space 7, and the four second mounting blocks 6 are arranged in a matrix in the connecting space 7. A traveling mechanism is connected between every two symmetrically arranged first mounting blocks 5, or a traveling mechanism is connected between every two symmetrically arranged second mounting blocks 6.
[0040] Optionally, one end of every two symmetrically arranged first mounting blocks 5 that are close to each other is set as an inclined surface, and one end of every two symmetrically arranged second mounting blocks 6 that are close to each other is also set as an inclined surface. Correspondingly, the two ends of the traveling mechanism can also be provided with side surfaces parallel to the end surfaces of the first mounting blocks 5 or the second mounting blocks 6 on both sides, so that the upper part of the traveling mechanism can be trapezoidal. After the traveling mechanism is connected to the two first mounting blocks 5 or the two second mounting blocks 6, the traveling mechanism can be fixed through the inclined end surfaces, reducing the pressure on the bolts when the traveling mechanism is connected to the lower beam 3.
[0041] In an alternative embodiment, the traveling mechanism includes a traveling wheel 8 and a support frame 9; one end of the support frame 9 is detachably connected to the support body, and a traveling wheel 8 is rotatably connected to the support frame 9. The traveling wheel 8 is arranged away from the support body.
[0042] In the above embodiments, each support frame 9 can be made of metal. Each support frame 9 can be selectively bolted to the first mounting blocks 5 and the second mounting blocks 6. A traveling wheel 8 is rotatably connected to one side of each support frame 9 close to the ground. The traveling wheel 8 can be a solid metal wheel. The traveling wheel 8 can be connected to the support frame 9 through a bearing and a rotating shaft. Six traveling mechanisms can be provided, and the six traveling mechanisms can be respectively arranged on the first mounting blocks 5 or the second mounting blocks 6 according to requirements: when performing bridge erection work on a single-line bridge, the six traveling mechanisms are respectively arranged on the second mounting blocks 6, and when performing bridge erection work on a double-line bridge, the six traveling mechanisms are respectively arranged on the first mounting blocks 5 to adapt to working environments of different widths.
[0043] In an alternative embodiment, the traveling mechanism further includes an adjusting oil cylinder 10; the adjusting oil cylinder 10 is fixed on the support frame 9, and the telescopic end of the adjusting oil cylinder 10 is rotatably connected to the traveling wheel 8. The adjusting oil cylinder 10 can drive the traveling wheel 8 to approach or move away from the support body.
[0044] In the above embodiment, the support frame 9 is fixed on the side of the lower beam 3 close to the ground and is connected to and fixes one end of the adjusting oil cylinder 10. Wherein, a pin shaft parallel to the ground is provided on the side of the support frame 9 away from the ground, and the other end of the adjusting oil cylinder 10 is rotatably connected to the traveling wheel 8. A sleeve for fixing the adjusting oil cylinder 10 is further provided below the support frame 9 to prevent the adjusting oil cylinder 10 from rotating around the pin shaft. A horizontal pin shaft passing through the adjusting oil cylinder 10 can be provided below the adjusting oil cylinder 10, and the traveling wheel 8 is rotatably connected to the pin shaft, so that the lower beam 3 can move relative to the ground through the support frame 9, the adjusting oil cylinder 10 and the traveling wheel 8.
[0045] Optionally, the ground can be the upper surface of a paved bridge or the surface of a foundation. Tracks can be provided on the ground, and the traveling wheels 8 are clamped in the tracks and move along the length direction of the tracks.
[0046] In an alternative embodiment, the traveling mechanism further includes a support platform 11; the support platform 11 is arranged between adjacent support frames 9, the support platform 11 is connected to the support body, and the support platform 11 is used to support the support body.
[0047] In the above embodiment, along the traveling direction, one support platform 11 is arranged between adjacent support frames 9, or one support platform 11 is arranged between adjacent traveling wheels 8; the support platform 11 can be made of metal, and the support platform 11 can be in a frustum shape. The width of the end of the support platform 11 close to the ground is greater than that of the other end, so that the support platform 11 is more stable. When it is necessary to fix the lower beam 3, one traveling wheel 8 can be lifted by each adjusting oil cylinder 10 to separate the traveling wheel 8 from the bridge, and the lower beam 3 can be fixed by multiple support platforms 11, so that the support body is fixed; four support platforms 11 can be provided, and the support platforms 11 can be connected to the lower beam 3 through screws to adjust the height of each support platform 11, so that the lower end surfaces of the multiple support platforms 11 are arranged on the same plane, so that the lower beam 3 is fixed more stably.
[0048] When the middle leg needs to move, one traveling wheel 8 can be lowered by each adjusting oil cylinder 10 to make the traveling wheel 8 contact and lift the bridge, and the multiple support platforms 11 are separated from the lower beam 3, so that the support body can slide relative to the track of the bridge through the multiple traveling wheels 8.
[0049] Furthermore, the adjusting oil cylinder 10 can also be arranged on the support platform 11, while the traveling wheels 8 are rotatably connected to the support frame 9. By driving the support platform 11 to approach or move away from the pressed bridge through the adjusting oil cylinder 10, the fixing of the middle leg and the sliding relative to the bridge can also be completed.
[0050] In an alternative embodiment, the traveling mechanism further includes a column 12; one end of the column 12 is connected to the support body, and the other end is connected to the support platform 11. The axis of the column 12 coincides with the axis of the support platform 11.
[0051] In the above embodiment, the column 12 can be cylindrical, the column 12 can be made of metal, the axis of the column 12 is perpendicular to the ground, and the axis of the column 12 coincides with the axis of the support platform 11. One end of the column 12 close to the lower beam 3 extends into the lower beam 3 and is connected to the lower beam 3, and the other end of the column 12 away from the lower beam 3 is connected to the support platform 11, so that the support platform 11 can be fixed on the lower beam 3 through the column 12, keeping a certain distance between the lower beam 3 and the ground to avoid obstacles hindering the lower beam 3.
[0052] In an alternative embodiment, the traveling mechanism further includes a lever block 13; the lever block 13 is arranged on the column 12, the column 12 is threadedly connected to the support body, and the lever block 13 can drive the column 12 to rotate relative to the support body, so that the support platform 11 approaches or moves away from the support body.
[0053] In the above embodiment, the lever block 13 can be made of metal, the lever block 13 can be arranged on one side of the column 12 close to the support platform 11, and the lever block 13 can be cylindrical, so that the operator can rotate the column 12 through the lever block 13. Since the column 12 is threadedly connected to the support body, the column 12 can drive the support platform 11 to rotate relative to the lower beam 3. By adjusting the lever block 13, the distance between the support platform 11 and the lower beam 3 can be adjusted, thereby ensuring that the lower end surfaces of each support platform 11 are arranged on the same plane, making the fixing of the lower beam 3 more firm and stable.
[0054] In an alternative embodiment, the traveling mechanism further includes a track sweeping plate 14. A track sweeping plate 14 is arranged on each support frame 9. The track sweeping plate 14 is arranged on one side of the traveling wheel 8 and is used to sweep the moving path of the traveling wheel 8.
[0055] In the above embodiments, the rail sweeping plate 14 can be arranged perpendicular to the ground. The rail sweeping plate 14 can be made of metal and rubber. One end of the rail sweeping plate 14 facing away from the ground can be welded to the support frame 9. A broom made of rubber can be arranged at one end of the rail sweeping plate 14 close to the ground. The rail sweeping plate 14 sweeps foreign objects on the ground through the rubber material for scanning codes. Six walking wheels 8 can be arranged below the lower beam 3. The six walking wheels 8 are divided into two columns along the walking direction, and three walking wheels 8 are arranged in each column. A rail sweeping plate 14 is arranged at both ends of the three walking wheels 8 in each column, so that no matter whether the lower beam 3 moves forward or backward, the dust or foreign objects on the ground can be swept by the rail sweeping plate 14, avoiding the influence of foreign objects on the rotation of the walking wheels 8.
[0056] The present utility model also provides a bridge erecting machine, including a middle support leg.
[0057] In the above embodiments, the single-arm bridge erecting machine can further include a first column and a third column. The first column and the third column are respectively arranged on both sides of the middle support leg. The first column and the third column are respectively slidably connected to the erection beam 1. The first column is arranged at one end close to the bridge waiting to be erected, and the third column is arranged at one end where the bridge erection is completed. The single-arm bridge erecting machine walks on the bridge through the sliding of the first column, the middle support leg and the third column relative to the erection beam 1. Through the curved beam, the load-sharing beam and the driving member on the middle support leg, the erection beam 1 can be offset relative to the middle support leg, and the curved beam drives the erection beam 1 to rotate relative to the middle support leg, so that the first column, the middle support leg and the third column are not arranged in a straight line, thereby completing the curved erection of the bridge.
[0058] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A middle support leg, characterized in that, It includes a support main body and a traveling mechanism detachably mounted on the support main body. First mounting seats and second mounting seats are arranged at intervals on the support main body. The first mounting seats and the second mounting seats are both arranged in groups. Each group of the first mounting seats includes symmetrically arranged first mounting blocks (5), and each group of the second mounting seats includes symmetrically arranged second mounting blocks (6). The distance between the symmetrically arranged first mounting blocks (5) is greater than the distance between the symmetrically arranged second mounting blocks (6). The traveling mechanism is selectively connected to the first mounting blocks (5) and the second mounting blocks (6).
2. The middle leg according to claim 1, characterized in that, Each group of the first mounting seats includes at least two of the first mounting blocks (5) arranged at intervals in the width direction of the support main body; Each group of the second mounting seats includes at least two of the second mounting blocks (6) arranged at intervals in the width direction of the support main body.
3. The middle support leg according to claim 2, characterized in that, A connection space (7) is arranged on the support main body. Each group of the first mounting seats is provided with two groups of symmetrically arranged first mounting blocks (5) in the connection space (7), and each group of the first mounting blocks (5) includes two relatively arranged first mounting blocks (5); Each group of the second mounting seats is provided with two groups of symmetrically arranged second mounting blocks (6) in the connection space (7), and each group of the second mounting blocks (6) includes two relatively arranged second mounting blocks (6); The distance between two relatively arranged first mounting blocks (5), or two relatively arranged second mounting blocks (6) gradually decreases in the direction away from the ground.
4. The middle support leg according to claim 1, wherein The traveling mechanism includes traveling wheels (8) and a support frame (9); One end of the support frame (9) is detachably connected to the support main body, and the traveling wheels (8) are rotatably connected to the support frame (9). The traveling wheels (8) are arranged away from the support main body.
5. The middle support leg according to claim 4, wherein The traveling mechanism further includes an adjusting oil cylinder (10); The adjusting oil cylinder (10) is fixed on the support frame (9), and the telescopic end of the adjusting oil cylinder (10) is rotatably connected to the traveling wheel (8). The adjusting oil cylinder (10) can drive the traveling wheel (8) to approach or move away from the support main body.
6. The middle support leg according to claim 4, wherein, The traveling mechanism further includes a support platform (11); The support platform (11) is arranged between adjacent support frames (9). The support platform (11) is connected to the support main body, and the support platform (11) is used to support the support main body.
7. The middle support leg according to claim 6, wherein, The traveling mechanism further includes a column (12); One end of the column (12) is connected to the support main body, and the other end is connected to the support platform (11). The column (12) and the support platform (11) are arranged with their axes coinciding.
8. The middle leg according to claim 7, characterized in that, The traveling mechanism further includes a lever block (13); The lever block (13) is arranged on the column (12). The column (12) is threadedly connected to the support main body. The lever block (13) can drive the column (12) to rotate relative to the support main body, so that the support platform (11) approaches or moves away from the support main body.
9. The middle leg according to claim 4, characterized in that, The traveling mechanism further includes a track sweeping plate (14), and one track sweeping plate (14) is arranged on each support frame (9). The track sweeping plate (14) is arranged on one side of the traveling wheel (8), and the track sweeping plate (14) is used for sweeping the moving path of the traveling wheel (8).
10. A bridge erecting machine, characterized in that, Comprising the middle support leg according to any one of claims 1-9.