A pole beam for steel box arch bridge arch rib segment installation and a use method thereof

Abstract

The present application provides a kind of flat shoulder beam for steel box arch bridge arch rib section installation and its use method, comprising: mounting frame, top is equipped with for hoisting lifting lug;Two sliding seats, interval setting in the side of mounting frame and at least one of them can slide relative to mounting frame;Hoisting assembly, including being equipped with the mounting seat of sliding seat, winding wheel being rotationally equipped in mounting seat and lifting rope, one end of lifting rope is wound in winding wheel, other end is connected with the lifting ring of arch rib section by lifting hook;Wherein mounting frame is equipped with at least one first driving element, for driving at least one sliding seat moves, to increase or reduce the interval between two sliding seats;Mounting seat is equipped with second driving element, for transmission connection with winding wheel to drive it to rotate, in turn adjust the extension length of lifting rope, so as to realize that lifting point interval and the length of lifting rope of each lifting point can be adjusted according to the lifting ring position and installation requirement of different steel box arch bridge arch rib section, and improve the stability and safety of hoisting process.

Description

Technical Field

[0001] This invention relates to the field of steel box arch bridge construction technology, specifically to a spreader beam for installing arch rib segments of steel box arch bridges and its usage method. Background Technology

[0002] Steel box arch bridges have the advantages of light weight, strong overall stability, and good seismic performance, and are widely used in bridge engineering in high-seismic-intensity areas. Currently, the arch ribs of steel box arch bridges are usually prefabricated in the factory and transported to the construction site in sections for hoisting and installation.

[0003] In existing technologies, during the hoisting of arch rib segments, spreader beams are typically used for auxiliary hoisting to reduce deformation during lifting. However, due to differences in length and center of gravity among different arch rib segments, their hoisting connection points also vary. The hooks of existing spreader beams are mostly fixed, which can easily lead to uneven stress on the arch rib segments after connection, causing tilting or swaying during hoisting and transportation. This not only poses certain safety hazards during hoisting but also makes it difficult to adjust the installation posture of the arch rib segments, reducing construction efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a spreader beam for the installation of arch rib segments in steel box arch bridges and its method of use, so as to solve the problems in existing technologies where the fixed position of the lifting point of the spreader beam easily leads to difficulty in adjusting the lifting posture of the arch rib segments, uneven stress, and poor lifting stability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A spreader beam for installing arch rib segments in a steel box girder bridge, comprising:

[0007] The mounting frame has lifting lugs at the top for hoisting.

[0008] Two sliding seats are spaced apart on the side of the mounting frame, and at least one of them can slide relative to the mounting frame;

[0009] The hoisting assembly includes a mounting base provided on the sliding seat, a winding wheel rotatably provided on the mounting base, and a hoisting rope. One end of the hoisting rope is wound around the winding wheel, and the other end is connected to the lifting ring of the arch rib segment through a hook.

[0010] The mounting bracket is provided with at least one first driving member for driving at least one of the sliding seats to move, thereby increasing or decreasing the distance between the two sliding seats; the mounting bracket is provided with a second driving member for drivingly connecting with the winding wheel to drive it to rotate, thereby adjusting the extension length of the lifting rope.

[0011] Furthermore, the mounting bracket has a limiting groove and a rolling groove respectively formed on its side along its length direction. The sliding seat is provided with a limiting block and a roller. The limiting block is slidably engaged in the limiting groove, and the roller is slidably disposed in the rolling groove.

[0012] Furthermore, a fixing plate is provided on one side of the rolling groove, and a plurality of toothed grooves are provided on the fixing plate; the mounting seat can be slidably arranged up and down relative to the sliding seat, and the mounting seat is provided with a locking member; wherein, when the suspension rope is under force, the mounting seat moves downward relative to the sliding seat under the action of the suspension rope tension, so that the locking member engages with the toothed groove to fix the mounting seat.

[0013] Furthermore, the locking component includes a locking block disposed at one end of the mounting base and passing through the sliding base, the locking block having locking teeth that engage with a plurality of the toothed grooves; a sliding groove is formed on the side of the sliding base, the mounting base also having a mounting block, the mounting block being engaged with the mounting groove, the mounting groove having a mounting rod and a spring, the mounting block and the spring being sleeved on the mounting rod, the spring abutting against the side of the mounting groove and between the mounting block.

[0014] Furthermore, the winding wheel has two winding slots, each wound with a lifting rope, and pulleys are rotatably provided on both sides of the winding wheel, with the two lifting ropes overlapping the corresponding pulleys; the mounting base is also provided with an adjusting member, which is used to adjust the position of the pulleys.

[0015] Furthermore, the adjusting component includes a pull rod, and the pulley is rotatably mounted on the pull rod; the mounting base has a strip-shaped connecting hole, one end of the pull rod passes through the connecting hole, and is locked by an adjusting nut.

[0016] Furthermore, the adjusting component includes a telescopic device, the pulley is rotatably disposed at the telescopic end of the telescopic device, and is slidably engaged inside the mounting base.

[0017] Furthermore, the mounting bracket has two lugs, each of which is slidably mounted on the mounting frame; the mounting frame is also provided with an adjustment component, which is connected to the two lugs and is used to drive the two lugs closer or further apart.

[0018] Furthermore, the adjustment assembly includes a screw rotatably mounted on the mounting frame and two movable blocks slidably mounted on the mounting frame and respectively connected to both ends of the screw. The two movable blocks are respectively connected to the two lifting lugs. A handwheel is rotatably mounted on the mounting frame, and one end of the handwheel is connected to the end of the screw.

[0019] The present invention also employs a method for using a spreader beam, including the aforementioned spreader beam for installing arch rib segments of a steel box arch bridge, and further comprising the following steps:

[0020] Step 1: Use lifting equipment to lower the installation frame above the arch rib segment to be hoisted. Adjust the distance between the two sliding seats according to the position of the lifting ring on the arch rib segment, and connect the hook to the lifting ring on the arch rib segment using the hoisting rope.

[0021] Step 2: According to the installation posture requirements of the arch rib segment, adjust the extension length of the hoisting rope through the second drive component so that the arch rib segment reaches the predetermined installation tilt angle;

[0022] Step 3: Start the lifting equipment to lift the mounting frame and transport the arch rib segment to the designated installation position;

[0023] Step 4: After the arch rib segments are installed, disconnect the hook from the lifting ring. Then repeat steps 1 to 3 above for the remaining arch rib segments to complete the installation of all arch rib segments.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. By setting adjustable sliding seats on both sides of the mounting frame, and installing lifting components on the sliding seats that can adjust the extension length of the lifting ropes, the spacing between the lifting points of the spreader beam and the length of the lifting ropes at each lifting point can be adjusted according to the lifting ring position and installation posture requirements of different arch rib segments of the steel box arch bridge. This allows for effective control of the stress state and installation posture of the arch rib segments before lifting, avoiding tilting or swaying of the arch rib segments during lifting and transportation due to fixed lifting point positions and uneven lifting rope stress. This improves the stability and safety of the lifting process, and also facilitates the quick and accurate adjustment of the arch rib segments to the predetermined installation posture, thereby improving construction efficiency and installation accuracy. Attached Figure Description

[0026] Appendix Figure 1 This embodiment is a three-dimensional structural diagram of the spreader beam used for hoisting arch rib segments in the installation of arch rib segments of a steel box arch bridge.

[0027] Appendix Figure 2 This embodiment is a front view structural diagram of the spreader beam used for hoisting the arch rib segment of a steel box arch bridge.

[0028] Appendix Figure 3 This embodiment is a side view of the spreader beam used for hoisting the arch rib segment of a steel box arch bridge, as shown in another embodiment.

[0029] Appendix Figure 4 This embodiment shows an exploded structural diagram of the sliding seat and mounting seat in the spreader beam used for the installation of arch rib segments in a steel box arch bridge.

[0030] Appendix Figure 5 Appendix Figure 4 A magnified schematic diagram of the partial structure at point A in the middle;

[0031] Appendix Figure 6 Appendix Figure 4 A magnified view of the structure at point B in the middle;

[0032] Appendix Figure 7 This embodiment is a front view of the hoisting assembly in the spreader beam used for the installation of arch rib segments in a steel box arch bridge.

[0033] Appendix Figure 8 This embodiment is a schematic diagram of the winding wheel and pulley in the spreader beam used for the installation of arch rib segments in a steel box arch bridge;

[0034] Appendix Figure 9 This embodiment is a schematic diagram of the adjusting component in the spreader beam used for the installation of arch rib segments in a steel box arch bridge, representing another embodiment.

[0035] Appendix Figure 10 This embodiment is a schematic diagram of the installation frame in the spreader beam used for installing the arch rib segments of a steel box arch bridge;

[0036] Explanation of icon numbers:

[0037] 10. Arch rib segment; 11. Lifting ring;

[0038] 20. Mounting bracket; 201. Limiting groove; 202. Rolling groove; 21. Lifting lug; 22. Fixing plate; 221. Toothed groove;

[0039] 30. Sliding seat; 301. Slide groove; 302. Mounting groove; 31. Limiting block; 32. Roller;

[0040] 40. Lifting assembly; 41. Mounting base; 401. Connecting hole; 42. Winding reel; 43. Lifting rope; 44. Lifting hook; 45. Sliding block; 46. Mounting block; 47. Pulley;

[0041] 50. First driving component;

[0042] 60. Second driving component;

[0043] 70. Clip; 71. Clip block; 711. Clip tooth; 72. Mounting rod; 73. Spring;

[0044] 80. Adjusting component; 81. Tie rod; 82. Adjusting nut; 83. Expansion joint;

[0045] 90. Adjustment component; 91. Screw; 92. Moving block; 93. Handwheel.

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the technical solutions of this invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0048] like Figures 1-10 As shown, this embodiment of the invention proposes a spreader beam for installing arch rib segments of a steel box girder bridge, comprising: a mounting frame 20 with lifting lugs 21 on the top for hoisting; two sliding seats 30, spaced apart on the side of the mounting frame 20, at least one of which can slide relative to the mounting frame 20; and a hoisting assembly 40, including a mounting base 41 on the sliding seat 30, a winding wheel 42 rotatably mounted on the mounting base 41, and a hoisting rope 43, one end of the hoisting rope 43 being wound around the winding wheel 42, and the other end being connected to the lifting ring 11 of the arch rib segment 10 via a hook 44; wherein, the mounting frame 20 is provided with at least one first driving member 50 for driving at least one of the sliding seats 30 to move, thereby increasing or decreasing the distance between the two sliding seats 30; the mounting base 41 is provided with a second driving member 60 for being connected to the winding wheel 42 for driving it to rotate, thereby adjusting the extension length of the hoisting rope 43.

[0049] In this embodiment of the invention, during use, the mounting frame 20 is first hoisted above the arch rib segment 10 of the steel box arch bridge to be installed using a lifting device. According to the distribution position of each lifting ring 11 on the arch rib segment 10, the operator drives at least one sliding seat 30 to move along the length direction of the mounting frame 20 through the first driving component 50 to adjust the distance between the two sliding seats 30 so that the position of the hoisting assembly 40 matches the position of the lifting ring 11 of the arch rib segment 10. Then, the hook 44 is connected to the lifting ring 11 of the arch rib segment 10 through the hoisting rope 43 to complete the hanging.

[0050] After the lifting point connection is completed, according to the installation posture requirements of the arch rib segment 10, the operator drives the winding wheel 42 to rotate through the second drive component 60, thereby adjusting the extension length of the lifting rope 43, so that the arch rib segment 10 can be adjusted to the predetermined tilt angle or posture state before lifting; then the lifting equipment is started to lift the installation frame 20 as a whole, and the arch rib segment 10 is stably lifted off the ground and transported to the designated installation position, completing the lifting operation of the arch rib segment 10.

[0051] Thus, through the above structure and working method, the present invention can flexibly adjust the spacing between the lifting points of the arch rib segment 10 and the stress state of each lifting point before hoisting, so that the lifting rope 43 maintains a reasonable stress direction as much as possible during the stress process, avoiding posture deviation or swaying of the arch rib segment 10 during hoisting and transportation due to fixed lifting point positions or non-adjustable length of the lifting rope 43, thereby improving the stability and safety of the hoisting process; at the same time, the present invention can quickly adjust the posture of the arch rib segment 10 according to the center of gravity position and installation angle requirements of different arch rib segments 10, which is conducive to the precise positioning of the arch rib segment 10, reduces the difficulty of manual adjustment, and improves the overall construction efficiency and installation accuracy.

[0052] In this embodiment, the first driving component 50 can be a bidirectional jack, a screw mechanism, or other linear driving mechanism capable of providing horizontal driving force to achieve sliding adjustment of the sliding seat 30; this invention does not limit this. The second driving component 60 is preferably a worm gear mechanism, i.e., the worm is connected to the shaft of the winding reel 42, and the worm drives the worm to rotate, thereby driving the winding reel 42 to rotate for adjustment. Since the worm gear mechanism has a self-locking characteristic, it can effectively prevent the winding reel 42 from rotating in the opposite direction when the hoisting rope 43 is under force, eliminating the need for an additional mechanical locking device, thereby improving the reliability, safety, and stability of the hoisting rope 43 length adjustment during hoisting. At the same time, the end of the worm can be reserved with an interface to connect to an electric drive device or a hydraulic drive device, thereby realizing semi-automatic or fully automatic adjustment of the hoisting rope 43 length to adapt to the usage requirements under different construction conditions.

[0053] like Figure 2 and Figure 4 As shown in this embodiment of the invention, the mounting frame 20 has a limiting groove 201 and a rolling groove 202 respectively formed on its side along its length. The sliding seat 30 is provided with a limiting block 31 and a roller 32. The limiting block 31 is slidably engaged in the limiting groove 201, and the roller 32 is slidably disposed in the rolling groove 202. Through the cooperation of the limiting block 31 with the limiting groove 201 and the roller 32 with the rolling groove 202, the sliding seat 30 can maintain guidance and stability during the adjustment process, reduce sway and friction, and make the adjustment of the lifting point spacing more stable and precise, thereby improving the posture stability and safety of the arch rib segment 10 during the hoisting process.

[0054] like Figure 4As shown in this embodiment, in order to ensure that the sliding seat 30 will not move during the hoisting process and to ensure stability, a fixing plate 22 is provided on one side of the rolling groove 202, and a plurality of toothed grooves 221 are provided on the fixing plate 22; the mounting seat 41 can be slidably arranged up and down relative to the sliding seat 30, and the mounting seat 41 is provided with a locking member 70; wherein, when the hoisting rope 43 is under force, the mounting seat 41 moves downward relative to the sliding seat 30 under the tension of the hoisting rope 43, so that the locking member 70 engages with the toothed grooves 221 to fix the mounting seat 41.

[0055] In practical use, the mounting frame 20 is lowered above the arch rib segment 10 to be hoisted, and the position of the sliding seat 30 is adjusted by the first drive component 50 so that the lifting point of the hoisting assembly 40 is aligned with the lifting ring 11 of the arch rib segment 10. At this time, the mounting seat 41 can slide up and down relative to the sliding seat 30, and the hoisting rope 43 is connected to the arch rib segment 10 through the winding wheel 42 and the hook 44. During the hoisting process, when the hoisting rope 43 is under tension, the mounting seat 41 moves downward under the tension of the hoisting rope 43, so that the locking piece 70 automatically engages with the toothed groove 221 on the fixing plate 22, thereby locking the mounting seat 41 in the predetermined position. This ensures that the sliding seat 30 will not move up and down under the hoisting force, thus keeping the hoisting rope 43 in a stable vertical state and preventing the arch rib segment 10 from swaying or tilting during hoisting and transportation.

[0056] Specifically, such as Figures 1-10 As shown, in this embodiment, the locking member 70 includes a locking block 71 disposed at one end of the mounting base 41 and passing through the sliding base 30. The locking block 71 is provided with locking teeth 711 that cooperate with a plurality of toothed grooves 221. A sliding groove 301 is opened on the side of the sliding base 30. The mounting base 41 is slidably locked in the sliding groove 301 by a slider 45. An installation groove 302 is opened on the side of the sliding groove 301. The mounting base 41 is also provided with an installation block 46. The installation block 46 is locked in the installation groove 302. The installation groove 302 is provided with an installation rod 72 and a spring 73. The installation block 46 and the spring 73 are both sleeved on the installation rod 72. The spring 73 abuts against the side of the installation groove 302 and the installation block 46. When the force on the hoisting rope 43 decreases or the hoisting state is released, the mounting base 41 returns to its original position relative to the sliding base 30 under the elastic action of the spring 73, causing the locking block 71 to move upwards accordingly, thereby disengaging the locking teeth 711 from the tooth groove 221 on the fixing plate 22. At this time, the mounting base 41 and the sliding base 30 are unlocked, and the sliding base 30 returns to a state where it can slide freely relative to the mounting frame 20 under the action of the roller 32, so as to readjust the position of the hoisting point to meet the hoisting requirements of the subsequent arch rib segment 10.

[0057] In one embodiment, in order to improve the stability of the arch rib segment 10 during hoisting, two spreader beams can be set at intervals on both sides of the arch rib segment 10, and two sets of lifting rings 11 can be set on the arch rib segment 10, so that the lifting ropes 43 on the hoisting assembly 40 are connected to the corresponding lifting rings 11 respectively, thereby increasing the hoisting force-bearing area and improving the stability of the arch rib segment 10 during hoisting, transportation and installation.

[0058] To simplify the number of spreader beams, in this embodiment, as follows: Figures 1-10 As shown, the winding reel 42 has two winding slots, each with a lifting rope 43 wound around it. Both sides of the winding reel 42 are equipped with pulleys 47, and the two lifting ropes 43 overlap the corresponding pulleys 47. The mounting base 41 also has an adjusting member 80 for adjusting the position of the pulleys 47. By driving the winding reel 42 to rotate, the two lifting ropes 43 can be simultaneously released or retrieved from the winding reel 42, thereby simultaneously adjusting the length of the lifting ropes 43 on both sides. The structure is compact and the operation is simple.

[0059] Furthermore, since the two winding grooves are located on different planes, while the pulleys 47 on both sides are located on the same plane, by setting the pulleys 47, the connection points of the two lifting ropes 43 with the lifting rings 11 of the arch rib segment 10 after being led out are kept in the same plane, thereby avoiding the arch rib segment 10 from twisting or swaying due to inconsistent force, and ensuring the overall stability of the lifting process.

[0060] Furthermore, the arch rib segment 10 requires not only a longitudinal tilt angle but also a lateral tilt angle during installation. For example... Figure 3 As shown, by adjusting the position of the pulley 47 by adjusting the component 80, the lengths of the two suspension ropes 43 can be made different, thereby driving the arch rib segment 10 to deflect to one side, realizing the adjustment of the lateral tilt angle of the arch rib segment 10, and further improving the adaptability of the arch rib segment 10 during the installation process.

[0061] like Figures 1-10As shown, in this embodiment, the adjusting component 80 includes a pull rod 81, and the pulley 47 is rotatably mounted on the pull rod 81. The mounting base 41 has a strip-shaped connecting hole 401, and one end of the pull rod 81 passes through the connecting hole 401 and is locked by an adjusting nut 82. In use, the position of the pulley 47 on the pull rod 81 is pre-adjusted according to the lateral tilt angle requirement of the arch rib segment 10 during hoisting. Specifically, by rotating the adjusting nut 82, the pull rod 81 moves along the strip-shaped connecting hole 401 on the mounting base 41, thereby changing the installation position of the pulley 47 relative to the mounting base 41. After the position of the pulley 47 is adjusted, the pull rod 81 is locked by the adjusting nut 82. Subsequently, the hoisting rope 43 is wound around the pulley 47 and hoisted. Due to the different positions of the pulleys 47 on both sides, the effective length of the hoisting rope 43 on both sides differs, thereby achieving lateral tilt angle control of a single segment of the arch rib during hoisting and ensuring the stability of the hoisting process. In this embodiment, two adjusting nuts 82 can be provided. By locking the two adjusting nuts 82 together, the pull rod 81 can be further fixed, thereby ensuring the fixed installation of the pulley 47.

[0062] Of course, in other embodiments, for the purpose of simplifying operation, such as... Figure 9 As shown, the adjusting component 80 can be a telescopic device 83. The pulley 47 is rotatably mounted on the telescopic end of the telescopic device 83 and is slidably locked inside the mounting base 41. The position of the pulley 47 can be changed by the telescopic method of the telescopic device 83 to achieve attitude adjustment during the hoisting process. At the same time, in order to facilitate the installation of the telescopic device 83, the structure of the mounting base 41 is also adapted. The telescopic device 83 can be a telescopic jack.

[0063] like Figures 1-10 As shown, in this embodiment, two lifting lugs 21 are provided, each of which is slidably mounted on the mounting frame 20. The mounting frame 20 is also equipped with an adjustment component 90, which is connected to the two lifting lugs 21 and used to move the two lifting lugs 21 closer together or further apart. By adjusting the relative positions of the two lifting lugs 21 on the mounting frame 20, the force application point of the lifting equipment can correspond to the center of gravity position of different arch rib segments 10, thereby making the lifting force more balanced and avoiding tilting or swaying of the arch rib segments 10 during lifting and transportation due to force application point offset. This improves the stability and safety of the lifting process and enhances the adaptability and effectiveness of the lifting operation.

[0064] Specifically, such as Figure 10As shown, in this embodiment, the adjustment component 90 includes a screw 91 rotatably mounted on the mounting frame 20 and two moving blocks 92 slidably mounted on the mounting frame 20 and respectively connected to both ends of the screw 91. The two moving blocks 92 are respectively connected to the two lifting lugs 21. The screw 91 is a bidirectional screw, and the two moving blocks 92 are threadedly connected to the two threaded sections of the bidirectional screw. By rotating the screw 91, the two moving blocks 92 can move synchronously in opposite directions, thereby causing the two lifting lugs 21 to move closer or further apart, achieving continuous adjustment of the distance between the lifting lugs 21. Furthermore, to facilitate rotating the screw 91, a handwheel 93 is rotatably mounted on the mounting frame 20, with one end of the handwheel 93 connected to the end of the screw 91. Specifically, handwheels 93 are connected to both ends of the screw 91. Rotating the handwheels 93 can drive the screw 91 to rotate, thereby achieving manual adjustment of the distance between the two lifting lugs 21, which is intuitive and convenient to operate. The handwheels 93 at both ends further enhance user convenience.

[0065] This invention also provides a method for using a spreader beam, including the aforementioned spreader beam for installing arch rib segments of a steel box arch bridge, and further including the following steps:

[0066] Step 1: Use the lifting equipment to lower the mounting frame 20 above the arch rib segment 10 to be hoisted. According to the position of the lifting ring 11 of the arch rib segment 10, adjust the distance between the two sliding seats 30 through the first drive component 50, and connect the hook 44 to the lifting ring 11 on the arch rib segment 10 through the hoisting rope 43.

[0067] Step 2: According to the installation posture requirements of the arch rib segment 10, adjust the extension length of the hoisting rope 43 through the second drive component 60 so that the arch rib segment 10 reaches the predetermined installation tilt angle; wherein, the installation tilt angle of the arch rib segment 10 can be obtained by simulation software.

[0068] Step 3: Start the lifting equipment to lift the mounting frame 20 and transport the arch rib segment 10 to the designated installation position;

[0069] Step 4: After the arch rib segment 10 is installed, disconnect the hook 44 from the lifting ring 11. Then repeat steps one to three above for the remaining arch rib segments 10 to complete the installation of all arch rib segments 10.

Claims

1. A pole beam for installation of an arch rib segment of a steel box arch bridge, characterized in that, The utility model relates to a kind of installation frame and arch rib segment lifting device, including: Mounting frame (20), top is equipped with for hoisting lug (21); Two sliding seats (30) are arranged at the side of the mounting frame (20) at intervals, and at least one of the two can slide relative to the mounting frame (20); Hoisting assembly (40), including the mounting seat (41) of the sliding seat (30), the winding wheel (42) rotationally arranged in the mounting seat (41) and lifting rope (43), one end of the lifting rope (43) is wound on the winding wheel (42), the other end is connected with the lifting ring (11) of arch rib segment (10) by lifting hook (44); Wherein, the mounting frame (20) is provided with at least one first driving element (50), for driving at least one the sliding seat (30) moves, to increase or reduce the interval between two the sliding seat (30);The mounting seat (41) is provided with second driving element (60), for transmission connection with the winding wheel (42), to drive it rotates, in turn adjust the extension length of the lifting rope (43); The side of the mounting frame (20) is provided with limit slot (201) and rolling groove (202) along the length direction respectively, the sliding seat (30) is provided with limit block (31) and gyro wheel (32), the limit block (31) is slidably arranged in the limit slot (201), the gyro wheel (32) is slidably arranged in the rolling groove (202); One side of the rolling groove (202) is provided with fixed plate (22), a plurality of tooth grooves (221) are formed in the fixed plate (22);The mounting seat (41) can be slidably arranged on the sliding seat (30), and the mounting seat (41) is provided with clamping element (70);Wherein, when the lifting rope (43) is stressed, the mounting seat (41) moves downward relative to the sliding seat (30) under the tension of the lifting rope (43), so that the clamping element (70) is clamped in the tooth groove (221), to fix the mounting seat (41).

2. The beam for installation of the arch rib segment of the steel box arch bridge according to claim 1, wherein, The clamping element (70) includes clamping block (71) arranged at one end of the mounting seat (41) and penetrating the sliding seat (30), the clamping block (71) is provided with clamping tooth (711) matched with a plurality of tooth grooves (221);The side of the sliding seat (30) is provided with sliding groove (301), the mounting seat (41) is slidably arranged in the sliding groove (301) by sliding block (45), the side of the sliding groove (301) is provided with mounting groove (302), the mounting seat (41) is further provided with mounting block (46), the mounting block (46) is clamped in the mounting groove (302), the mounting groove (302) is provided with mounting rod (72) and spring (73), the mounting block (46) and the spring (73) are both sleeved on the mounting rod (72), and the spring (73) is abutted between the side of the mounting groove (302) and the mounting block (46).

3. The beam for installation of the arch rib segment of the steel box arch bridge according to claim 1, wherein, The winding wheel (42) has two winding grooves, two of which are wound with the lifting ropes (43), and the two sides of the winding wheel (42) are rotatably provided with pulleys (47), and the two lifting ropes (43) are overlapped on the corresponding pulleys (47); the mounting seat (41) is further provided with an adjusting piece (80), and the adjusting piece (80) is used for adjusting the position of the pulley (47).

4. The beam as claimed in claim 3, wherein, The adjusting piece (80) comprises a pull rod (81), and the pulley (47) is rotatably arranged on the pull rod (81); a strip-shaped connecting hole (401) is formed in the mounting seat (41), one end of the pull rod (81) penetrates through the connecting hole (401), and is locked by an adjusting nut (82).

5. The beam as claimed in claim 3, wherein, The adjusting piece (80) comprises a telescopic device (83), the pulley (47) is rotatably arranged on the telescopic end of the telescopic device (83), and is slidingly clamped on the inner side of the mounting seat (41).

6. The beam as claimed in claim 1, wherein, The lifting lug (21) is provided with two, each of the lifting lug (21) is slidingly arranged on the mounting frame (20); the mounting frame (20) is further provided with an adjusting assembly (90), the adjusting assembly (90) is used for being connected to the two lifting lugs (21), for driving the two lifting lugs (21) to be close or far away.

7. The beam as claimed in claim 6, wherein, The adjusting assembly (90) comprises a screw rod (91) rotatably arranged on the mounting frame (20) and two moving blocks (92) slidingly arranged on the mounting frame (20) and respectively connected to the two ends of the screw rod (91), the two moving blocks (92) are respectively connected with the two lifting lugs (21), a hand wheel (93) is rotatably arranged on the mounting frame (20), one end of the hand wheel (93) is connected with the end of the screw rod (91).

8. A method of using a poniard beam, characterized by, The flat shoulder beam for steel box arch bridge arch rib segment installation according to any one of claims 1-7 further comprises the following steps: Step one, the mounting frame (20) is lowered above the arch rib segment (10) to be hoisted by the hoisting equipment, the distance between the two sliding seats (30) is adjusted by the first driving piece (50) according to the position of the lifting ring (11) of the arch rib segment (10), and the lifting hook (44) is connected with the lifting ring (11) on the arch rib segment (10) through the lifting rope (43); Step two, according to the installation attitude requirement of the arch rib segment (10), the extension length of the lifting rope (43) is adjusted by the second driving piece (60), so that the arch rib segment (10) reaches the predetermined installation inclination angle; Step three, the mounting frame (20) is hoisted by starting the hoisting equipment, and the arch rib segment (10) is transported to the specified installation position; Step four, after the installation of the arch rib segment (10) is completed, the connection between the lifting hook (44) and the lifting ring (11) is released, and then the above steps one to three are repeated for the remaining arch rib segments (10) to complete the installation of all the arch rib segments (10). Step four, after the installation of the arch rib segment (10) is completed, the connection between the lifting hook (44) and the lifting ring (11) is released, and then the above steps one to three are repeated for the remaining arch rib segments (10) to complete the installation of all the arch rib segments (10).

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