Middle supporting leg and bridge girder erection machine

Abstract

The utility model relates to the technical field of bridge girder erection machines, and discloses a middle supporting leg and a bridge girder erection machine. The main body comprises an upper cross beam, a lower cross beam and an adjustable vertical beam, a partial load beam is arranged on the upper cross beam, and the curved beam is rotationally connected to the partial load beam and used for hanging the main beam; the adjustable vertical beam comprises a guide sleeve, a guide column, a movable cross beam and an adjusting oil cylinder, rotation and deviation of the main beam relative to the upper cross beam are achieved through the partial load beam and the rotatable curved beam, and the moving distance of the lower cross beam can be increased through the guide column, the guide sleeve, the movable cross beam and the adjusting oil cylinder. The technical problems that in the prior art, a second column cannot rotate and horizontally move relative to a main beam at the same time, contraction of a side arm of the second column is limited, and the application scene is limited are solved, and the technical effects that the second column can rotate and horizontally move relative to the main beam at the same time, and the contraction length is larger are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge erection machines, in particular to a middle outrigger and a bridge erection machine. Background Art

[0002] In transportation infrastructure construction, bridge construction is often a critical control element of the entire project. This is particularly true for my country's high-speed rail and expressway bridges, which account for a significant proportion of the total construction line. Currently, the total length of high-speed rail bridges, both completed and under construction, averages over 50% of the line length, and sometimes even exceeds 80% within a single construction section. To improve the prefabrication level and construction efficiency of high-speed and railway bridges, my country's high-speed rail and expressway bridges generally utilize prestressed concrete simply supported box girders and prefabricated erection methods, requiring a large number of large-scale construction equipment such as bridge erection machines. 40m simply supported box girders can significantly reduce the number of high piers, pile foundation work, and demolition costs for crossing difficult geological conditions such as high mountains and canyons, and for crossing towns and urban areas. This makes railway route selection more flexible, less restrictive, economically sound, and safer.

[0003] In the related art, the bridge-building machine not only needs to erect straight box girders, but also needs to erect curved box girders so that the laid bridge is curved. Therefore, the main beam of the bridge-building machine is required to be able to rotate and offset relative to the No. 2 column to realize the curved through-hole. However, the existing No. 2 column cannot rotate and translate relative to the main beam at the same time. At the same time, the bottom of the No. 2 column needs to be lifted during rotation to separate the No. 2 column from the ground. The retraction distance of the side arm of the existing No. 2 column is limited by the stroke of the cylinder, and the retraction distance is limited, resulting in limited application scenarios. Utility Model Content

[0004] The purpose of the utility model is to provide a middle support leg and a bridge-building machine to solve the technical problems in the prior art that the second column cannot simultaneously rotate and translate relative to the main beam, and the side arm of the second column is limited in contraction and applicable scenarios are limited.

[0005] In order to solve the above technical problems, the utility model provides a middle leg, comprising a main body and a curved beam;

[0006] The main body includes an upper crossbeam away from the ground, a lower crossbeam close to the ground, and an adjustable vertical beam. Both ends of the upper crossbeam are connected to the lower crossbeam through an adjustable vertical beam respectively. The length of the adjustable vertical beam can be adjusted so that the lower crossbeam can move towards or away from the upper crossbeam.

[0007] A sub-load beam is provided on the upper crossbeam, the upper crossbeam is slidably connected to the sub-load beam, the curved beam is rotatably connected to the sub-load beam and can move synchronously with the sub-load beam, and the curved beam is used to suspend the main beam;

[0008] The adjustable vertical beam includes a guide sleeve, a guide column, a movable crossbeam and an adjusting oil cylinder. The guide sleeve is arranged on the lower crossbeam, and the guide column is arranged on the upper crossbeam. The guide column can be slidably inserted into the guide sleeve, and the guide column and the guide sleeve are detachably connected.

[0009] The movable crossbeam is detachably connected to the guide post. One end of the adjusting oil cylinder is fixed to the lower crossbeam, and the other end is drivingly connected to the movable crossbeam. The adjusting oil cylinder can drive the movable crossbeam and the guide post to slide relative to the guide sleeve.

[0010] In an optional embodiment, the adjustable vertical beam further comprises a first latch cylinder;

[0011] The first latch cylinder is arranged on the movable crossbeam, and the guide column is provided with a plurality of connection holes arranged at intervals along the length direction. The first latch cylinder can drive the latch to pass through the movable crossbeam and the connection holes to fix the movable crossbeam and the guide column.

[0012] In an optional embodiment, a running mechanism is provided on the side of the lower crossbeam away from the upper crossbeam, and a group of first mounting seats and a group of second mounting seats are provided on the lower crossbeam, and the first mounting seats and the second mounting seats are arranged at intervals along the length direction of the lower crossbeam, each group of the first mounting seats includes a symmetrically arranged first sub-mounting seat, and each group of the second mounting seats includes a symmetrically arranged second sub-mounting seat, and the running mechanism is selectively connected to the first sub-mounting seat and the second sub-mounting seat.

[0013] In an optional embodiment, each group of the first mounting seats includes at least two first sub-mounting seats spaced apart along the width direction of the lower crossbeam;

[0014] Each group of the second mounting seats includes at least two second sub-mounting seats spaced apart along the width direction of the lower beam.

[0015] In an optional embodiment, a connecting cavity is provided on the lower crossbeam, and each group of the first mounting seats is provided with two symmetrically arranged groups of the first sub-mounting seats in the connecting cavity, and each group of the first sub-mounting seats includes two first sub-mounting seats arranged opposite to each other, and the running mechanism can be installed between the two first sub-mounting seats;

[0016] Each group of the second mounting seats is provided with two groups of symmetrically arranged second sub-mounting seats in the connecting cavity, and each group of the second sub-mounting seats includes two second sub-mounting seats arranged opposite to each other, and the running mechanism can be installed between the two second sub-mounting seats;

[0017] The distance between two oppositely arranged first sub-mounting seats or two oppositely arranged second sub-mounting seats gradually decreases in the direction pointing to the upper crossbeam.

[0018] In an optional embodiment, a driving member is further included;

[0019] The two ends of the driving member are respectively connected to the sub-load beam and the upper crossbeam, and the driving member is used to drive the sub-load beam to move relative to the upper crossbeam along a first direction;

[0020] The curved beam is movable relative to the main beam along a second direction, where the second direction is an extension direction of the main beam and is perpendicular to the first direction;

[0021] When the curved beam tends to move relative to the main beam, the main beam applies a force F1 to the curved beam along the second direction. When the driving member drives the sub-load beam to move, the sub-load beam applies a force F2 to the curved beam along the first direction. The combined force of the force F1 and the force F2 drives the curved beam to rotate relative to the sub-load beam.

[0022] In an optional embodiment, a driving member is further included;

[0023] Two ends of the driving member are respectively connected to the load-sharing beam and the upper crossbeam, and the driving member is used to drive the load-sharing beam to move relative to the upper crossbeam along a first direction.

[0024] In an optional embodiment, a driving unit is further included, wherein the driving unit is connected to the upper crossbeam, and the driving unit can drive the load-sharing beam to rotate relative to the curved beam through the upper crossbeam.

[0025] In an optional embodiment, the curved beam includes a hanger, a connecting column, a frame, a sliding assembly and a driving portion;

[0026] The connecting column is passed through the sub-load beam and is rotatably connected to the sub-load beam. The hanger and the frame are respectively connected to the two ends of the connecting column. The frame is arranged in the main body. The sliding assembly is installed on the frame and is slidably connected to the main beam. The driving part is installed on the frame and is used to drive the frame to slide relative to the main beam.

[0027] The utility model also provides a bridge erection machine, comprising the middle support leg.

[0028] The utility model provides a middle support leg, comprising a main body and a curved beam; the main body comprises an upper crossbeam away from the ground, a lower crossbeam close to the ground and an adjustable vertical beam, the two ends of the upper crossbeam are respectively connected to the lower crossbeam by an adjustable vertical beam, and the length of the adjustable vertical beam can be adjusted so that the lower crossbeam can move in the direction close to or away from the upper beam; a load-sharing beam is provided on the upper crossbeam, the upper crossbeam is slidably connected to the load-sharing beam, the curved beam is rotatably connected to the load-sharing beam, and can move synchronously with the load-sharing beam, and the curved beam is used to suspend the main beam; the adjustable vertical beam comprises a guide sleeve, a guide column, a movable crossbeam and an adjusting cylinder, the guide sleeve is arranged on the lower crossbeam, the guide column is arranged on the upper crossbeam, the guide column can be slidably inserted into the guide sleeve, and the guide column and the guide sleeve are detachably connected; the movable crossbeam is detachably connected to the guide column, one end of the adjusting cylinder is fixed to the lower crossbeam, and the other end is drivingly connected to the movable crossbeam, and the adjusting cylinder can drive the movable beam and the guide column to slide relative to the guide sleeve. By means of the load-sharing beam and the rotatable curved beam, the main beam can be rotated and offset relative to the upper beam, thereby realizing curved through-holes, and the moving distance of the lower beam can be adjusted by means of the guide column, guide sleeve, movable beam and adjusting cylinder. After the lower beam moves to the limit of the adjusting cylinder, the movable beam and the guide column can be reconnected, and the adjusting cylinder can be used again to drive the lower beam to be lifted, thereby increasing the moving distance of the lower beam. This solves the technical problems in the prior art that the No. 2 column cannot simultaneously rotate and translate relative to the main beam, and the side arm of the No. 2 column is limited in retraction, resulting in limited applicable scenarios. The technical effect is achieved that the No. 2 column can simultaneously rotate and translate relative to the main beam, and has a greater retraction length. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front view of the middle support leg and the bridge erection machine mentioned in the embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the overall structure of the middle support leg and the bridge erection machine mentioned in the embodiment of the utility model;

[0031] Figure 3 This is a schematic structural diagram of the middle leg mentioned in an embodiment of the present utility model;

[0032] Figure 4 for Figure 3 Another perspective structural diagram;

[0033] Figure 5 This is a schematic structural diagram of the curved beam mentioned in an embodiment of the present utility model;

[0034] Figure 6 for Figure 5 A structural diagram from another perspective;

[0035] Figure 7 This is a front view of the lower crossbeam and the walking mechanism mentioned in the embodiment of the utility model;

[0036] Figure 8 for Figure 7 sectional view of

[0037] Figure 9 for Figure 7 Top view of .

[0038] In the figure, 1-main beam; 2-driving part; 3-load-sharing beam; 4-upper beam; 5-lower beam; 6-guide sleeve; 7-guide column; 8-movable beam; 9-adjusting cylinder; 10-first latch cylinder; 11-first sub-mounting seat; 12-second sub-mounting seat; 13-connecting cavity; 14-hanging seat; 15-connecting column; 16-frame; 17-driving part; 18-guide wheel; 19-pressure arm wheel; 20-load-bearing wheel; 21-bridge; 22-telescopic cylinder; 23-rotating wheel; 24-support frame; 25-support leg; 26-column No. 1; 27-column No. 3. DETAILED DESCRIPTION

[0039] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In the related art, the bridge-building machine not only needs to erect straight box girders, but also needs to erect curved box girders so that the laid bridge is curved. Therefore, the main beam of the bridge-building machine is required to be able to rotate and offset relative to the No. 2 column to realize the curved through-hole. However, the existing No. 2 column cannot rotate and translate relative to the main beam at the same time. At the same time, the bottom of the No. 2 column needs to be lifted during rotation to separate the No. 2 column from the ground. The retraction distance of the side arm of the existing No. 2 column is limited by the stroke of the cylinder, and the retraction distance is limited, resulting in limited application scenarios.

[0042] In view of this, if Figures 1-9As shown, some embodiments of the present invention provide a middle support leg, including a main body and a curved beam; the main body includes an upper crossbeam 4 away from the ground, a lower crossbeam 5 close to the ground and an adjustable vertical beam, the two ends of the upper crossbeam 4 are connected to the lower crossbeam 5 by an adjustable vertical beam respectively, and the length of the adjustable vertical beam can be adjusted so that the lower crossbeam 5 can move towards or away from the upper crossbeam 4; a load-sharing beam 3 is provided on the upper crossbeam 4, the upper crossbeam 4 is slidably connected to the load-sharing beam 3, and the curved beam is rotatably connected to the load-sharing beam 3 and can move with the load-sharing beam The beam 3 moves synchronously, and the curved beam is used to hang the main beam 1; the adjustable vertical beam includes a guide sleeve 6, a guide column 7, a movable crossbeam 8 and an adjusting cylinder 9. The guide sleeve 6 is arranged on the lower crossbeam 5, and the guide column 7 is arranged on the upper crossbeam 4. The guide column 7 can be slidably inserted into the guide sleeve 6, and the guide column 7 is detachably connected to the guide sleeve 6; the movable crossbeam 8 is detachably connected to the guide column 7, one end of the adjusting cylinder 9 is fixed to the lower crossbeam 5, and the other end is driven and connected to the movable crossbeam 8. The adjusting cylinder 9 can drive the movable crossbeam 8 and the guide column 7 to slide relative to the guide sleeve 6.

[0043] In the above embodiment, the cross section of the main beam 1 can be I-shaped, that is, in addition to the rectangular structure in the middle part of the main beam 1, it can also include two upper and lower ear beams. The main beam 1 can be made of metal. The main beam 1 can be connected by multiple sections of shorter beams. Adjacent beams can be connected together by splicing end to end. Adjacent beams can be connected by pins and bolts. The four corners of the end face of the beam on one side are all provided with protruding bolts with sockets. The end face of the beam on the other side is provided with four recesses corresponding to the protrusions at the four corners, and insertion holes for the pins to be inserted into the recesses and the sockets are provided on the surface. After the adjacent beams are plugged in at the ends, they can be fixed by pins so that the surfaces of the adjacent beams are flush and the connection is firm; the total length of the main beam 1 can reach 76 meters, one end of the curved beam is rotatably connected to the load-bearing beam 3, and the other end is provided with a receiving structure for receiving the main beam 1, and the receiving structure is provided with two right-angled parts, and the two right-angled parts respectively hook the ear beams of the main beam 1 away from the ground, and a rectangular structure of the main beam 1 is provided in the middle of the two right-angled parts, so that the curved beam can fix the main beam 1, and the main beam 1 can slide relative to the curved beam along the length direction, and the load-bearing beam 3 can be provided on the main body and slidably connected to the main body.

[0044] Optionally, the upper crossbeam 4, the lower crossbeam 5 and the adjustable vertical beam are respectively made of metal materials, the upper crossbeam 4 and the lower crossbeam 5 are both provided with bending portions close to each other, and the upper crossbeam 4 and the lower crossbeam 5 are respectively arranged symmetrically relative to the vertical axis, and the two end faces of the upper crossbeam 4 are respectively connected to the lower crossbeam 5 through an adjustable vertical beam so that the distance between the upper crossbeam 4 and the lower crossbeam 5 can be adjusted, so that the lower crossbeam 5 can be moved toward the upper crossbeam 4 through the adjustable vertical beam, thereby causing the lower crossbeam 5 to be lifted.

[0045] Optionally, a sliding hole is provided on the side of the upper crossbeam 4 away from the lower crossbeam 5, and the sliding hole is arranged in the middle of the upper crossbeam 4. The cross-section of the sliding hole can be rectangular, and a load-sharing beam 3 is provided in the sliding hole. The length of the load-sharing beam 3 is less than the length of the sliding hole, so that the load-sharing beam 3 can be driven by the driving member 2 to reciprocate along the length direction in the sliding hole, thereby achieving the function of horizontally moving the main beam 1 and realizing the rotation and curved passage of the main beam 1. Furthermore, a bearing part is provided at the opening of the sliding hole near the lower crossbeam 5. The bearing part can be set as a metal column, and there can be multiple bearing parts. The multiple bearing parts are arranged at intervals along the length direction of the sliding hole, so that the load-sharing beam 3 can be supported by multiple bearing parts when sliding in the sliding hole, so that the load-sharing beam 3 can be fixed.

[0046] Optionally, the guide sleeve 6 is arranged on the lower cross beam 5, the guide sleeve 6 is connected to the end face of the lower cross beam 5 and is arranged perpendicular to the ground, the cross section of the guide sleeve 6 can be rectangular, and two cavities can be provided in the guide sleeve 6, and a guide column 7 is provided in each of the two cavities of the guide sleeve 6 for sliding connection, and the guide column 7 is in the shape of a rectangular parallelepiped. Each guide column 7 can be slidably connected to the cavity of the guide sleeve 6 in a direction perpendicular to the ground, and an adjusting cylinder 9 is provided on the lower cross beam 5 and is arranged perpendicular to the ground. The adjusting cylinder 9 can be arranged between the two cavities, and a movable cross beam 8 connected to the guide column 7 is provided at the end of the adjusting cylinder 9 away from the guide sleeve 6. The movable cross beam 8 is arranged horizontally, and the movable cross beam 8 is respectively sleeved on the two guide columns 7. The adjusting cylinder 9 can drive the two guide columns 7 to slide relative to the guide sleeve 6 through the movable cross beam 8, so that the total length of the guide column 7 and the guide sleeve 6 can be adjusted.

[0047] Furthermore, the main body can be set on the paved bridge 21, and the main body can be slidably connected to the bridge 21, wherein a track is provided on the side of the bridge 21 facing away from the ground, and the main body is slidably placed in the track so that the main body can move relative to the bridge 21 and is more stable when moving; the main body can be annular, and the supporting structure and the main beam 1 are respectively arranged in the annular space of the main body.

[0048] The utility model provides a middle support leg, including a main body and a curved beam; the main body includes an upper crossbeam 4 away from the ground, a lower crossbeam 5 close to the ground and an adjustable vertical beam, a load-sharing beam 3 is provided on the upper crossbeam 4, the curved beam is rotatably connected to the load-sharing beam 3, and the curved beam is used to suspend the main beam 1; the adjustable vertical beam includes a guide sleeve 6, a guide column 7, a movable crossbeam 8 and an adjusting oil cylinder 9, and the rotation and offset of the main beam 1 relative to the upper crossbeam 4 are realized by the load-sharing beam 3 and the rotatable curved beam, so that the curved hole can be realized, and the guide column 7, the guide sleeve 6, the movable crossbeam 8 and the adjusting oil cylinder 9 are used to adjust the main beam 1 relative to the upper crossbeam 4. The cylinder 9 can adjust the moving distance of the lower crossbeam 5. After the lower crossbeam 5 moves to the limit of the adjusting cylinder 9, the movable crossbeam 8 and the guide column 7 can be reconnected, and the adjusting cylinder 9 can be used again to drive the lower crossbeam 5 to be lifted, thereby increasing the moving distance of the lower crossbeam 5. This solves the technical problems in the prior art that the No. 2 column cannot simultaneously rotate and translate relative to the main beam 1, and the side arm of the No. 2 column is limited in retraction, and the applicable scenarios are limited. The technical effect that the No. 2 column can simultaneously rotate and translate relative to the main beam 1 and have a greater retraction length is achieved.

[0049] In an optional embodiment, the adjustable vertical beam also includes a first latch cylinder 10; the first latch cylinder 10 is arranged on the movable crossbeam 8, and the guide column 7 is provided with a plurality of connecting holes arranged at intervals along the length direction. The first latch cylinder 10 can drive the latch through the movable crossbeam 8 and the connecting hole to fix the movable crossbeam 8 and the guide column 7.

[0050] In the above embodiment, the first latch oil cylinder 10 is arranged on the movable crossbeam 8, and the first latch oil cylinder 10 is provided with a plurality of. Each guide column 7 is provided with a first latch oil cylinder 10, and each guide column 7 is provided with a plurality of connecting holes evenly arranged along the length direction of the guide column 7. The connecting holes can be circular, and the connecting holes are provided through the guide column 7 in the horizontal direction. The first latch oil cylinder 10 includes an oil cylinder and a cylindrical latch. The oil cylinder drives the cylindrical latch to move along the axial direction so that the latch can pass through the movable crossbeam 8, then pass through the guide column 7 through the connecting hole on the guide column 7, and then pass through another The guide column 7 and the movable crossbeam 8 are passed through one side so that the guide column 7 can be firmly connected to the movable crossbeam 8 through the first latch cylinder 10, and when the connection hole of the movable crossbeam 8 relative to the guide column 7 needs to be replaced, the latch can be withdrawn by extending and retracting the first latch cylinder 10, and then the movable crossbeam 8 is driven by the cylinder below, so that the first latch cylinder 10 is aligned with the connection holes on other guide columns 7, and then the latch in the first latch cylinder 10 is inserted to re-fix the movable crossbeam 8 and the guide column 7, thereby increasing the maximum elongation of the guide column 7 within the limited working stroke of the lower cylinder.

[0051] Optionally, the adjustable vertical beam also includes a second latch cylinder, which can be set on the guide sleeve 6 and perpendicular to the guide sleeve 6. The second latch cylinder can pass through the guide sleeve 6 and be connected to the connecting hole on the guide column 7 sliding in the guide sleeve 6, so that the second latch cylinder can lock the guide sleeve 6 and the guide column 7, so that when there is no need to adjust the height of the adjustable vertical beam, the total height of the main body can be fixed by the second latch cylinder.

[0052] In an optional embodiment, a running mechanism is provided on the side of the lower crossbeam 5 away from the upper crossbeam 4, and a group of first mounting seats and a group of second mounting seats are provided on the lower crossbeam 5. The first mounting seats and the second mounting seats are arranged at intervals along the length direction of the lower crossbeam 5. Each group of first mounting seats includes a symmetrically arranged first sub-mounting seat 11, and each group of second mounting seats includes a symmetrically arranged second sub-mounting seat 12. The running mechanism is selectively connected to the first sub-mounting seat 11 and the second sub-mounting seat 12.

[0053] In an optional embodiment, each group of first mounting seats includes at least two first sub-mounting seats 11 spaced apart along the width direction of the lower beam 5 ; each group of second mounting seats includes at least two second sub-mounting seats 12 spaced apart along the width direction of the lower beam 5 .

[0054] In the above embodiment, the width of the first mounting seat is greater than the width of the second mounting seat, wherein the first mounting seat can include an even number of first sub-mounting seats 11. By way of example, the first mounting seat can include two first sub-mounting seats 11, or four first sub-mounting seats 11. The two first sub-mounting seats 11 can be symmetrically arranged on the lower beam 5 relative to the center line of the lower beam 5, and the second mounting seat can also be arranged on the same plane as the first mounting seat. The second mounting seat can also include an even number of second sub-mounting seats 12. By way of example, there are two second sub-mounting seats 12. The two second sub-mounting seats 12 can be symmetrically arranged on the lower beam 5 relative to the center line of the lower beam 5, and the width between the two second sub-mounting seats 12 is smaller than the width between the two first sub-mounting seats 11, so that the running mechanism can be selectively connected to the two first sub-mounting seats 11, or to the two second sub-mounting seats 12 to face paving conditions of different widths.

[0055] In an optional embodiment, a connecting cavity 13 is provided on the lower crossbeam 5, and each group of first mounting seats is provided with two symmetrically arranged groups of first sub-mounting seats 11 in the connecting cavity 13, and each group of first sub-mounting seats 11 includes two oppositely arranged first sub-mounting seats 11, and the running mechanism can be installed between the two first sub-mounting seats 11; each group of second mounting seats is provided with two symmetrically arranged groups of second sub-mounting seats 12 in the connecting cavity 13, and each group of second sub-mounting seats 12 includes two oppositely arranged second sub-mounting seats 12, and the running mechanism can be installed between the two second sub-mounting seats 12; the distance between the two oppositely arranged first sub-mounting seats 11, or the two oppositely arranged second sub-mounting seats 12 gradually decreases in the direction pointing to the upper crossbeam 4.

[0056] In the above embodiment, the lower cross beam 5 is provided with a connecting cavity 13 along its length direction, and the connecting cavity 13 is provided along the vertical direction to penetrate the lower cross beam 5, and the cross section of the connecting cavity 13 is rectangular, and the connecting cavity 13 is provided with four inner walls, two inner walls extending along the length direction of the lower cross beam 5, and the other two inner walls extending along the width direction of the lower cross beam 5, wherein, on the two inner walls extending along the length direction of the lower cross beam 5, two first sub-mounts 11 and second sub-mounts 12 are provided on each inner wall, and the two first sub-mounts 11 opposite to the two inner walls are symmetrically arranged, and the two second sub-mounts 12 opposite to the two inner walls are symmetrically arranged, so that the four first sub-mounts 11 are arranged in a matrix in the connecting cavity 13, and the four second sub-mounts 12 are arranged in a matrix in the connecting cavity 13, and a running mechanism is connected between every two symmetrically arranged first sub-mounts 11, or a running mechanism is connected between every two symmetrically arranged second sub-mounts 12.

[0057] Optionally, one end of each two symmetrically arranged first sub-mounts 11 that are close to each other is set as an inclined surface, and one end of each two symmetrically arranged second sub-mounts 12 that are close to each other is also set as an inclined surface. Correspondingly, both ends of the running mechanism can also be provided with side surfaces that are parallel to the end faces of the first sub-mounts 11 or the second sub-mounts 12 on both sides, so that the top of the running mechanism can be trapezoidal. After the two first sub-mounts 11 or the two second sub-mounts 12 are connected, the running mechanism can be fixed by the inclined end faces to reduce the pressure of the bolts when the running mechanism is connected to the lower crossbeam 5.

[0058] Optionally, the running mechanism may include a telescopic oil cylinder 22, a rotating wheel 23 and a support frame 24. The support frame 24 is fixed on the lower cross beam 5 and fixed to one end of the telescopic oil cylinder 22. The other end of the telescopic oil cylinder 22 is rotatably connected to the rotating wheel 23. Along the walking direction, a support leg 25 is provided between adjacent running mechanisms. When it is necessary to fix the lower cross beam 5, a rotating wheel 23 can be lifted by each telescopic oil cylinder 22 to separate the rotating wheel 23 from the bridge 21. The lower cross beam 5 is fixed by multiple support legs 25 so that the main body is fixed. ; Four support legs 25 can be provided, and the support legs 25 can be connected to the lower crossbeam 5 through screws to adjust the height of each support leg 25, and six walking mechanisms can be provided, and the six walking mechanisms can be respectively set on the first sub-mounting seat 11 or the second sub-mounting seat 12 according to needs: when a single-track bridge is to be erected, the six walking mechanisms are respectively set on the second sub-mounting seat 12, and when a double-track bridge is to be erected, the six walking mechanisms are respectively set on the first sub-mounting seat 11 to meet the erection requirements of different widths.

[0059] When the middle leg needs to move, a rotating wheel 23 can be lowered through each telescopic cylinder 22 so that the rotating wheel 23 contacts and lifts the bridge 21, and multiple supporting legs 25 are separated from the lower beam 5 so that the main body can slide relative to the track of the bridge 21 through multiple rotating wheels 23.

[0060] Furthermore, the telescopic cylinder 22 can also be set on the support leg 25, and the rotating wheel 23 is rotatably connected to the support frame 24. The telescopic cylinder 22 drives the support leg 25 to move closer to and closer to the bridge 21, or away from the bridge 21, and the middle leg can also be fixed and slid relative to the bridge 21.

[0061] In an optional embodiment, a driving member 2 is further included; the two ends of the driving member 2 are respectively connected to the load-sharing beam 3 and the upper crossbeam 4, and the driving member 2 is used to drive the load-sharing beam 3 to move relative to the upper crossbeam 4 along a first direction; the curved beam can move relative to the main beam 1 along a second direction, and the second direction is the extension direction of the main beam 1 and the second direction is perpendicular to the first direction.

[0062] In an optional embodiment, when the curved beam has a tendency to move relative to the main beam 1, the main beam 1 applies a force F1 to the curved beam in the second direction. When the driving member 2 drives the sub-load beam 3 to move, the sub-load beam 3 applies a force F2 to the curved beam in the first direction. The resultant force of the force F1 and the force F2 drives the curved beam to rotate relative to the sub-load beam 3. When the curved beam has a tendency to move relative to the main beam, the main beam applies a force F1 to the curved beam in the second direction. When the driving member drives the sub-load beam to move, the sub-load beam applies a force F2 to the curved beam in the first direction. The resultant force of the force F1 and the force F2 drives the curved beam to rotate relative to the sub-load beam. When the curved beam has a tendency to move relative to the main beam 1, the main beam 1 applies a force F1 to the curved beam in the second direction. When the driving member 2 drives the sub-load beam 3 to move, the sub-load beam 3 applies a force F2 to the curved beam in the first direction. The resultant force of the force F1 and the force F2 drives the curved beam to rotate relative to the sub-load beam 3.

[0063] In the above embodiment, the driving member 2 can be an oil cylinder, one end of the driving member 2 is connected to the main body, and the other end is connected to the load-sharing beam 3. The driving member 2 can drive the load-sharing beam 3 to move in a first direction relative to the main body, or move in a direction opposite to the first direction, wherein the first direction is the width direction of the main body, and the first direction is set parallel to the ground, and the reciprocating load-sharing beam 3 can also carry the curved beam and the main beam 1 to move relative to the main body along the first direction or the opposite direction of the first direction.

[0064] When the main beam 1 moves relative to the curved beam, the main beam 1 will generate a force F1 on the curved beam. The direction of F1 is generally along the length direction of the main beam 1 and opposite to the moving direction of the main beam 1. At this time, the main beam 1 has not rotated relative to the upper crossbeam 4, and the second direction is the moving direction of the main beam 1 relative to the curved beam, that is, the length direction of the main beam 1. That is to say, when the main beam 1 does not rotate relative to the upper crossbeam 4, the first direction and the second direction are arranged vertically. At this time, the driving member 2 can be used to drive the sub-load beam 3 to drive the curved beam to move relative to the main beam 1 along the first direction. The sub-load beam 3 gives the curved beam a force F2 along the first direction, and F2 gradually increases from small to large, so that the direction of the resultant force of F1 and F2 is constantly changing, so that the curved beam rotates relative to the sub-load beam 3, that is, the main beam 1 rotates relative to the upper crossbeam 4, thereby driving the adjustable vertical beam and the lower crossbeam 5 to rotate relative to the main beam 1 through the upper crossbeam 4.

[0065] In an optional embodiment, a driving member 2 is further included; both ends of the driving member 2 are respectively connected to the load-sharing beam 3 and the upper crossbeam 4, and the driving member 2 is used to drive the load-sharing beam 3 to move relative to the upper crossbeam 4 along the first direction.

[0066] In an optional embodiment, a driving unit is further included, which is connected to the upper crossbeam 4 , and the driving unit can drive the load-sharing beam 3 to rotate relative to the curved beam through the upper crossbeam 4 .

[0067] In the above embodiment, the driving member 2 and the driving unit can be used in conjunction with each other and installed together on the upper beam 4. The driving unit can be set to be manually pushed or set to a driving motor. The driving unit can be connected to the upper beam 4 through a rope, and the worker pulls the rope to make the upper beam 4 rotate relative to the load-bearing beam 3 through the curved beam. It can also be set to a driving motor with gears, and the driving motor engages with the gear ring on the curved beam through the gear, and drives the curved beam to rotate relative to the load-bearing beam 3 through the driving motor, thereby realizing the rotation of the upper beam 4 relative to the main beam 1.

[0068] In an optional embodiment, the curved beam includes a hanger 14, a connecting column 15, a frame 16, a sliding assembly and a driving unit 17; the connecting column 15 is passed through the load-sharing beam 3 and is rotatably connected to the load-sharing beam 3, the hanger 14 and the frame 16 are respectively connected to the two ends of the connecting column 15, the frame 16 is arranged in the main body, the sliding assembly is installed on the frame 16, and is slidably connected to the main beam 1, and the driving unit 17 is installed on the frame 16 and is used to drive the frame 16 to slide relative to the main beam 1.

[0069] In the above embodiment, the hanger 14 can be cylindrical, and the hanger 14 can be made of metal. The connecting column 15 is arranged at the end of the hanger 14 close to the ground. The connecting column 15 is also cylindrical. The axes of the connecting column 15 and the hanger 14 coincide and are arranged perpendicular to the ground. A hole for the connecting column 15 to pass through is provided on the load-sharing beam 3. The connecting column 15 passes through the hole and is rotatably connected to the load-sharing beam 3. The hanger 14 is arranged at the end of the load-sharing beam 3 away from the ground and abuts against the surface of the load-sharing beam 3. The connecting mechanism is arranged at the end of the connecting column 15 close to the ground. The connecting mechanism is used to connect the main beam 1 so that the main beam 1 can slide relative to the connecting mechanism.

[0070] The frame 16 can be made of solid cast iron or hollow cast iron. A supporting structure can be provided at the end of the frame 16 close to the ground, and the main beam 1 extends into the frame 16 and is slidably connected to the supporting structure through a sliding assembly. There can be two driving parts 17, and the two driving parts 17 are respectively arranged on both sides of the supporting structure. Each driving part 17 is connected to the surface of the main beam 1. Each driving part 17 includes a driving motor and a gear connected to the driving motor. The gear is connected to the rack on the outside of the lower ear beam of the main beam 1. The driving motor can drive the gear to rotate, and the gear can make the main beam 1 slide relative to the supporting structure by cooperating with the rack on the main beam 1. Furthermore, the sliding assembly is arranged on the frame 16, the sliding assembly is fixedly connected to the frame 16, and the sliding assembly is slidably connected to the surface of the main beam 1, so that when the driving part 17 drives the main beam 1 through the gear and the rack, the main beam 1 can reciprocate relative to the frame 16 through the sliding assembly.

[0071] Optionally, the sliding assembly includes a guide wheel 18, a pressure arm wheel 19 and a load-bearing wheel 20; the guide wheel 18, the pressure arm wheel 19 and the load-bearing wheel 20 are respectively rotatably connected to the frame 16, the guide wheel 18 abuts against the side wall of the main beam 1, the pressure arm wheel 19 abuts against the side of the main beam 1 facing the sub-load beam 3, and the load-bearing wheel 20 abuts against the side of the main beam 1 away from the sub-load beam 3, and the guide wheel 18, the pressure arm wheel 19 and the load-bearing wheel 20 are respectively slidably connected to the surface of the main beam 1.

[0072] Optionally, four guide wheels 18 can be provided, and the four guide wheels 18 are respectively fixed to the frame 16 through a connecting seat, and the four guide wheels 18 are arranged at the same height relative to the ground. Two guide wheels 18 are respectively provided at both ends of the frame 16, and the two guide wheels 18 are respectively arranged on both sides of the supporting structure, and each guide wheel 18 is slidably connected to the surface of the side wall of the main beam 1, so that the left and right sides of the main beam 1 are limited, and the main beam 1 cannot move left and right relative to the frame 16. At the same time, the guide wheels 18 can make the main beam 1 smoother in the sliding process, avoiding the main beam 1 and the frame 16 from scratching; and the pressure arm wheel 19 is provided on the frame 16 and is located on the side of the main beam 1 away from the ground. Four pressure arm wheels 19 can also be provided, and the four pressure arm wheels 19 are relatively It is set at the same height relative to the ground, and two pressure arm wheels 19 are respectively provided at both ends of the frame 16. The four pressure arm wheels 19 are respectively fixed to the frame 16 through a connecting seat. Each pressure arm wheel 19 is in contact with the surface of the main beam 1 away from the ground, so that the pressure arm wheel 19 can roll relative to the main beam 1, making the main beam 1 more stable and preventing the main beam 1 from jumping up and down. Furthermore, two load-bearing wheels 20 are provided, and the two load-bearing wheels 20 are respectively fixed on the supporting structure on the frame 16. The two load-bearing wheels 20 are set on the side of the two right-angled sides of the supporting structure away from the ground. After the main beam 1 extends into the supporting structure, the two sides of the main beam 1 are respectively pressed on the two load-bearing wheels 20, so that the main beam 1 slides relative to the frame 16 through the two load-bearing wheels 20.

[0073] Optionally, each load-bearing wheel 20 can be set as a plurality of cylindrical rollers, each roller being rotatably connected to the frame 16 through a base, and the plurality of rollers being arranged at intervals along the length direction of the main beam 1, and the axis of each roller being arranged perpendicular to the length direction of the main beam 1, so that the main beam 1 can be supported by the plurality of rollers, and can also slide relative to the frame 16 through the two pressure arm wheels 19 on both sides.

[0074] Some embodiments of the present invention further provide a bridge erection machine including a middle support leg.

[0075] In the above embodiment, if Figure 2As shown, the bridge erection machine can also include column No. 1 26 and column No. 3 27, which are respectively arranged on both sides of the middle support leg, and column No. 1 26 and column No. 3 27 are respectively connected to the main beam 1 in a sliding manner. Column No. 1 26 is arranged at the end close to the bridge 21 waiting to be erected, and column No. 3 27 is arranged at the end where the bridge frame is completed. The movement of the single-arm bridge erection machine on the bridge 21 is completed by sliding column No. 1 26, the middle support leg and column No. 3 27 relative to the main beam 1. The main beam 1 can be offset relative to the middle support leg through the curved beam, load-sharing beam 3 and driving member 2 on the middle support leg, and the main beam 1 can be driven to rotate relative to the middle support leg through the curved beam, so that column No. 1 26, the middle support leg and column No. 3 27 are not arranged in a straight line, thereby completing the curved erection of the bridge 21.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A middle leg, characterized in that: Including the main body and curved beam; The main body comprises an upper crossbeam (4) away from the ground, a lower crossbeam (5) close to the ground, and an adjustable vertical beam, wherein both ends of the upper crossbeam (4) are connected to the lower crossbeam (5) via one of the adjustable vertical beams, respectively, and the length of the adjustable vertical beam can be adjusted so that the lower crossbeam (5) can move toward or away from the upper crossbeam (4); A sub-load beam (3) is provided on the upper crossbeam (4), the upper crossbeam (4) is slidably connected to the sub-load beam (3), the curved beam is rotatably connected to the sub-load beam (3) and can move synchronously with the sub-load beam (3), and the curved beam is used to suspend the main beam (1); The adjustable vertical beam comprises a guide sleeve (6), a guide column (7), a movable crossbeam (8) and an adjusting oil cylinder (9); the guide sleeve (6) is arranged on the lower crossbeam (5); the guide column (7) is arranged on the upper crossbeam (4); the guide column (7) is slidably inserted into the guide sleeve (6); and the guide column (7) and the guide sleeve (6) are detachably connected; The movable crossbeam (8) is detachably connected to the guide column (7); one end of the regulating oil cylinder (9) is fixed to the lower crossbeam (5) and the other end is drivingly connected to the movable crossbeam (8); the regulating oil cylinder (9) can drive the movable crossbeam (8) and the guide column (7) to slide relative to the guide sleeve (6).

2. The middle leg according to claim 1, characterized in that: The adjustable vertical beam further comprises a first latch cylinder (10); The first latch oil cylinder (10) is arranged on the movable crossbeam (8), and the guide column (7) is provided with a plurality of connection holes spaced apart along the length direction. The first latch oil cylinder (10) can drive a latch to pass through the movable crossbeam (8) and the connection holes to fix the movable crossbeam (8) and the guide column (7).

3. The middle leg according to claim 1, characterized in that: A running mechanism is provided on a side of the lower crossbeam (5) away from the upper crossbeam (4); a group of first mounting seats and a group of second mounting seats are provided on the lower crossbeam (5); the first mounting seats and the second mounting seats are arranged at intervals along the length direction of the lower crossbeam (5); each group of the first mounting seats includes a symmetrically arranged first sub-mounting seat (11); each group of the second mounting seats includes a symmetrically arranged second sub-mounting seat (12); and the running mechanism is selectively connected to the first sub-mounting seat (11) and the second sub-mounting seat (12).

4. The middle leg according to claim 3, characterized in that: Each group of the first mounting seats comprises at least two first sub-mounting seats (11) spaced apart along the width direction of the lower crossbeam (5); Each group of the second mounting seats comprises at least two second sub-mounting seats (12) spaced apart along the width direction of the lower crossbeam (5).

5. The middle leg according to claim 3, characterized in that: A connecting cavity (13) is provided on the lower crossbeam (5); each group of the first mounting seats is provided with two groups of the first sub-mounting seats (11) symmetrically arranged in the connecting cavity (13); each group of the first sub-mounting seats (11) includes two first sub-mounting seats (11) arranged opposite to each other; and the running mechanism can be installed between the two first sub-mounting seats (11); Each group of the second mounting seats is provided with two groups of the second sub-mounting seats (12) symmetrically arranged in the connecting cavity (13); each group of the second sub-mounting seats (12) includes two second sub-mounting seats (12) arranged opposite to each other, and the running mechanism can be installed between the two second sub-mounting seats (12); The distance between the two first sub-mounting seats (11) arranged opposite to each other, or the distance between the two second sub-mounting seats (12) arranged opposite to each other, gradually decreases in a direction pointing toward the upper crossbeam (4).

6. The middle leg according to claim 1, characterized in that: Also includes a driving member (2); The two ends of the driving member (2) are respectively connected to the load-sharing beam (3) and the upper crossbeam (4), and the driving member (2) is used to drive the load-sharing beam (3) to move relative to the upper crossbeam (4) along a first direction; The curved beam can move relative to the main beam (1) along a second direction, wherein the second direction is an extension direction of the main beam (1) and the second direction is perpendicular to the first direction; when the curved beam has a tendency to move relative to the main beam (1), the main beam (1) applies a force F1 to the curved beam along the second direction, and when the driving member (2) drives the sub-load beam (3) to move, the sub-load beam (3) applies a force F2 to the curved beam along the first direction, and the combined force of the force F1 and the force F2 drives the curved beam to rotate relative to the sub-load beam (3).

7. The middle leg according to claim 1, characterized in that: Also includes a driving member (2); The two ends of the driving member (2) are respectively connected to the load-sharing beam (3) and the upper crossbeam (4), and the driving member (2) is used to drive the load-sharing beam (3) to move relative to the upper crossbeam (4) along a first direction.

8. The middle leg according to claim 7, characterized in that: It also includes a driving unit, which is connected to the upper crossbeam (4). The driving unit can drive the load-sharing beam (3) to rotate relative to the curved beam through the upper crossbeam (4).

9. The middle leg according to claim 1, characterized in that: The curved beam comprises a hanger (14), a connecting column (15), a frame (16), a sliding assembly and a driving part (17); The connecting column (15) is passed through the load-sharing beam (3) and is rotatably connected to the load-sharing beam (3); the hanger (14) and the frame (16) are respectively connected to the two ends of the connecting column (15); the frame (16) is arranged in the main body; the sliding assembly is installed on the frame (16) and is slidably connected to the main beam (1); the driving part (17) is installed on the frame (16) and is used to drive the frame (16) to slide relative to the main beam (1).

10. A bridge erection machine, characterized in that: The utility model comprises the middle leg as claimed in any one of claims 1 to 9.

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