A steel tube arch bridge arch rib closing device

Abstract

The present invention belongs to the field of bridge construction and discloses a steel pipe arch bridge arch rib closing device, comprising a slide rail shaft, a pair of symmetrically placed slide seats slidably engaged in the slide rail shaft, a vertically placed support shaft group is fixed on the slide seats, a connecting block is fixed on the upper end of the support shaft group, a fixing plate is fixed at a position near the bottom of the support shaft group, a vertically placed limit rod is fixed between the fixing plate and the connecting block, and a vertically placed first slide groove is opened on one side of the support shaft group near the limit rod; the present invention retracts the pull rope of the hoisting mechanism to enable the adjustment mechanism to drive the arch rib to move upward, and at the same time, the limiting rod constrains the first sliding plate and the adjusting mechanism, so as to avoid the arch rib shaking due to external wind force during the hoisting process, and when the arch rib moves up to the required position, either end of the arch rib can be selectively controlled to tilt to a corresponding degree according to the curvature of the arch ring of the arch bridge, so as to facilitate the precise alignment and closing of the arch rib.

Description

Technical Field

[0001] The invention belongs to the field of bridge construction, and in particular relates to an arch rib closing device for a steel tube arch bridge. Background Art

[0002] Arch ribs are one of the important components of an arch bridge. The arch ring of an arch bridge is generally assembled and spliced ​​from two or more arch ribs, and there are two symmetrically placed arch rings on the same arch bridge, and the two arch rings are arranged along the edges of the bridge deck on both sides. The existing technology for assembling arch ribs generally uses a crane to lift the arch ribs one by one and fix them to the connecting seats at both ends of the bridge deck. However, during the lifting process of the arch ribs, the arch ribs in the air are easily affected by external wind and shake, and the arch ribs are easily dropped due to the shaking. The external wind causes the arch ribs to shake, making it inconvenient to accurately align the arch ribs during the closing process, and thus there is a problem of inconvenience in closing the arch ribs. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a steel tube arch bridge arch rib closing device, which solves the problems in the existing technology that the arch ribs are easily affected by external wind forces and shake during hoisting, and it is inconvenient to accurately align the arch ribs during the closing process.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A steel tube arch bridge arch rib closing device includes a slide rail shaft, a pair of symmetrically placed slide seats are slidably engaged in the slide rail shaft, vertically placed support shaft groups are fixed on the slide seats, the upper ends of the support shaft groups are fixed with connecting blocks, fixed plates are fixed near the bottom of the support shaft groups, and vertically placed limit rods are fixed between the fixing plates and the connecting blocks.

[0006] A vertically placed first sliding groove is provided on one side of the support shaft group close to the limit rod, and a first sliding plate is slidably engaged in the first sliding groove. The first sliding plates are sleeved on the limit rod and slidably connected thereto, and an adjustment mechanism is fixed on the first sliding plate. A pair of pull ropes are fixed on the first sliding plate, and a lifting mechanism is fixed on the upper end of the connecting block. The lifting mechanisms are connected to the pull ropes on the corresponding sides, and the lifting mechanisms can reel in the pull ropes.

[0007] The adjusting mechanisms all include a placing plate, which is fixed to the first sliding plate, and a pair of vertically placed sleeves with open upper ends are fixed to the placing plates, and the planes where the central axes of the two sleeves are located are vertically placed with the slide rail axis, and a first threaded rod is rotatably connected in the sleeve, and a threaded top shaft is sleeved on the first threaded rod, and the top shaft is sleeved inside the sleeve and slidably engaged with the inner wall of the sleeve, and a first rotating motor that drives the first threaded rod is fixed to the inner bottom surface of the sleeve, and a support seat is fixed on the upper end of the top shaft, and a clamping assembly is fixed on the support seat.

[0008] The second guide rail is provided with a circle, and the second guide rail is provided with a circle. The second guide rail is provided with a circle. The second guide rail is provided with a circle. The second guide rail is provided with a circle. The second guide rail is provided with a circle.

[0009] The clamping components all include fixed strips, which are fixed to the support seats, and are placed coaxially with the slide rail shaft. The upper end surfaces of the fixed strips are fixed with coaxially placed rubber plates, and the rubber plates can be elastically expanded and contracted. The fixed strips are slidably clamped with a pair of plywood that are symmetrically placed along the axis of the slide rail shaft, and the plywood is provided with through slots, and the rubber plates can pass through the through slots. A driving unit is provided between the support seat and the fixed strips to drive the two plywood to move closer or away from each other.

[0010] The driving units all include gears rotatably connected to the lower end faces of the fixed strips, the central axes of the gears are all placed vertically, and the gears are all meshed with a pair of spur racks that are centrally symmetrically placed about their central axes, and the spur racks are all coaxially placed with the slide rail grooves, and the fixed strips are all provided with third sliding grooves corresponding one to one with the spur racks, and the spur racks are all slidably engaged with the corresponding third sliding grooves, and the spur racks correspond one to one with the splints, and connecting parts are fixed on the splints, and the connecting parts are all fixed with the corresponding spur racks through the third sliding grooves, and the lower end of the fixed strips is fixed with a coaxially placed telescopic cylinder, and the output end of the telescopic cylinder is fixed to any spur rack.

[0011] The placement plates are each provided with a coaxially placed fourth slide groove, the lower end of the sleeve is each located directly above the fourth slide groove, a slider is fixed to the lower end of the sleeve, the slider is slidably engaged in the fourth slide groove, a coaxially placed second threaded rod is rotatably connected in the fourth slide groove, and the thread directions of the second threaded rod are opposite on both sides of the symmetrical plane of the two sleeves, the sliders are sleeved on the second threaded rod and engaged with its threads, and a third rotating motor is provided on the placement plates to drive the second threaded rod to rotate.

[0012] The limit rods are all configured to be retractable, and the support shaft group includes a lower support shaft, an upper support shaft that is slidably engaged is sleeved in the lower support shaft, and the connecting blocks are fixed to the upper ends of the upper support shafts. A third threaded rod placed coaxially is rotatably connected in the lower support shaft, and the upper support shafts are sleeved on the third threaded rod and threadedly engaged with it, and a fourth rotating motor that drives the third threaded rod to rotate is fixedly installed in the slide.

[0013] A dual-axis rotating motor is fixedly installed in the slide rail shaft, and the output ends of the dual-axis rotating motors are connected to fourth threaded rods. The fourth threaded rods are placed coaxially with the slide rail shaft, and the thread directions of the two fourth threaded rods are placed in opposite directions. The fourth threaded rods pass through the slide seat and are connected to the slide seat thread.

[0014] The lifting mechanism includes a lifting platform, which is fixed to a connecting block. A pair of symmetrically placed fifth rotating motors are fixed on the lifting platform. The output ends of the fifth rotating motors are provided with rotating shafts, one end of the rotating shafts is connected to a differential, the differentials are fixed to the lifting platform, the rotating shafts are connected to the input ends of the differentials, a winding roller is connected between the output ends of the two differentials, the winding rollers are coaxially placed with the second threaded rod, differentials are provided at both ends of the winding rollers, the differentials are fixed on the lifting platform, the winding rollers are connected to the output ends of the differentials, a pair of winding wheels are fixed on the winding rollers, rope grooves are provided on the lifting platform, the pull ropes pass through the rope grooves and are fixed to the winding wheels, and multiple sets of locking assemblies are fixed on the lifting platform, and the locking assemblies are used to lock the input ends of the differentials.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention cooperates with the support shaft group, the connecting block, the limit rod, the first slide groove, the first sliding plate, the adjustment mechanism, the pull rope, and the hoisting mechanism. The hoisting mechanism reels in the pull rope so that the adjustment mechanism drives the arch rib to move upward. At the same time, the limit rod constrains the first sliding plate and the adjustment mechanism, thereby preventing the arch rib from shaking due to external wind during the hoisting process. In addition, the sleeve, the first threaded rod, the top shaft, the first rotating motor, the support seat, and the clamping assembly cooperate. When the arch rib moves up to the desired position, either end of the arch rib can be selectively controlled to tilt to a corresponding degree according to the curvature of the arch ring of the arch bridge, thereby facilitating the precise alignment and closing of the arch ribs.

[0017] 2. The present invention, through the coordinated arrangement of the second sliding plate, the second slide groove, the roller, the support plate, the rectangular sleeve, the barrier, the spring, and the second rotating motor, can isolate the two ends of any arch rib through the barrier to prevent sliding and falling during the hoisting process. At the same time, when any end of the arch rib is tilted, the barrier can be rotated and aligned accordingly to support and block it. The barrier can always maintain the support and blocking of the upper arch rib of the adjustment mechanism before the upper arch rib of the adjustment mechanism is completely closed and spliced ​​with the previous arch rib. Moreover, through the arrangement of the wedge surface on the barrier, when the arch ribs are close to each other for splicing, the mutual compression between the arch ribs pushes the barrier to squeeze the compression spring back into the rectangular sleeve, thereby preventing the barrier from hindering the closing and splicing of adjacent arch ribs.

[0018] 3. The present invention utilizes fixed strips and rubber sheets, and the elastic expansion and contraction of the rubber sheets to achieve stable support for arch ribs of various curvatures. Furthermore, the arrangement of clamping plates, gears, spur racks, and telescopic cylinders facilitates the clamping and fixation of arch ribs of various widths. Furthermore, the arrangement of a slider, a second threaded rod, and a third rotary motor automatically adjusts the spacing between the two sleeves, allowing the adjustment mechanism to support arch ribs of varying lengths.

[0019] 4. The present invention realizes the convenient control and adjustment of the position height of the lifting mechanism through the coordinated arrangement of the lower support shaft, the upper support shaft, the third threaded rod, and the fourth rotating motor, thereby realizing the closing and assembly of the arch ribs at different heights of the arch ring of the arch bridge. At the same time, the coordinated arrangement of the slide shaft, the dual-axis rotating motor, and the fourth threaded rod can automatically adjust the spacing between the support shaft groups on both sides to be suitable for the synchronous closing and assembly of the arch ribs in the arch bridges on both sides of bridge decks of various widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 2. It is a schematic diagram of the overall structure of the present invention from different viewing angles;

[0023] Figure 3 It is a partial structural schematic diagram of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the regulating mechanism of the present invention;

[0025] Figure 5 It is a partial structural diagram of the regulating mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the gear structure of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the hoisting mechanism of the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, a steel pipe arch bridge arch rib closing device includes a slide rail shaft 1, a pair of symmetrically placed slide seats 2 are slidably engaged in the slide rail shaft 1, a vertically placed support shaft group 300 is fixed to each slide seat 2, a connecting block 4 is fixed to the upper end of each support shaft group 300, a fixing plate is fixed near the bottom of each support shaft group 300, and a vertically placed limit rod 5 is fixed between the fixing plate and the connecting block 4;

[0030] A vertically placed first sliding groove is provided on one side of the support shaft group 300 close to the limit rod 5, and a first sliding plate 6 is slidably engaged in the first sliding groove. The first sliding plate 6 is sleeved on the limit rod 5 and slidably connected thereto. An adjustment mechanism is fixedly provided on the first sliding plate 6, and a pair of pull ropes 8 are fixed on the first sliding plate 6. A lifting mechanism is fixed on the upper end of the connecting block 4, and the lifting mechanism is connected to the pull rope 8 on the corresponding side, and the lifting mechanism can reel in the pull rope 8;

[0031] The adjusting mechanisms all include a placing plate 701, which is fixed to the first sliding plate 6, and a pair of sleeves 702 placed vertically and open at the upper end are fixed on the placing plate 701, and the planes where the central axes of the two sleeves 702 are located are perpendicular to the slide rail axis 1, and the first threaded rod 703 is rotatably connected in the sleeve 702, and the first threaded rod 703 is sleeved with a threaded top shaft 704, which is sleeved inside the sleeve 702 and slidably engaged with the inner wall of the sleeve 702, and the first rotating motor that drives the first threaded rod 703 is fixed to the inner bottom surface of the sleeve 702, and the upper end of the top shaft 704 is fixed with a support seat 705, and the support seat 705 is fixed with a clamping assembly;

[0032] Place the device on the bridge deck so that the slide shaft 1 is placed vertically to the arch surface of the arch bridge, and move the slide 2, which drives the support shaft group 300, the connecting block 4, the hoisting mechanism, the fixing plate, the limit rod 5, the first sliding plate 6, and the adjusting mechanism, so that the two adjusting mechanisms are respectively installed at the edges of the arch ribs on both sides of the arch bridge; in the initial state, the two clamping components in the adjusting mechanism are kept at the same horizontal height, and then the two arch ribs are respectively placed on the adjusting mechanisms on both sides, and the arch ribs are symmetrically placed with respect to the two clamping components in the corresponding adjusting mechanisms, and the arch ribs are clamped and fixed by the clamping components; then the hoisting mechanism is used to reel them up. The pull rope 8 is used to lift the first sliding plate 6, and the first sliding plate 6 drives the adjusting mechanism and the arch rib. At the same time, under the limiting constraints of the first slide groove and the limit rod 5, the arch rib can be prevented from shaking due to the influence of external wind during the lifting process; when the arch rib rises to the required position, any first rotating motor in the adjusting mechanism is selectively turned on, and the first rotating motor drives the first threaded rod 703, and the first threaded rod 703 drives the top shaft 704 to perform threaded engagement transmission. The top shaft 704 moves upward to push the support seat 705 and the clamping assembly, so that the side of the arch rib is tilted upward, and the tilting degree of the arch rib is adjusted accordingly according to the curvature of the arch bridge, so as to facilitate the closing, splicing and installation of the arch ribs of the arch bridge.

[0033] When the adjusting mechanism controls the tilting of either end of the arch rib according to the curvature of the arch bridge, the arch rib is prevented from falling due to the tilting of the arch rib before it is closed and spliced ​​with the previous arch rib. A second sliding groove placed coaxially is provided on the side wall of the sleeve 702, and the second sliding groove is located on the side where the two sleeves 702 are away from each other. A second sliding plate 706 is fixed on the top shaft 704, and the second sliding plate 706 passes through the second sliding groove and is slidably engaged with the second sliding groove. A pair of support plates are fixed on the second sliding plate 706, and rollers are rotatably connected between the support plates. The rollers are coaxially placed with the slide rail shaft 1. A rectangular sleeve 707 is fixed on each side wall. The rectangular sleeve 707 can rotate around the central axis of the roller in a vertical plane. A sliding blocking member 708 is provided in each rectangular sleeve 707. A coaxial spring 709 is provided in each rectangular sleeve 707. One end of the spring 709 is fixed to the roller, and the other end of the spring 709 is fixed to the blocking member 708. The side walls of the blocking member 708 away from one end of the rectangular sleeve 707 are wedge-shaped. The roller is connected to a second rotating motor 710 that drives it to rotate. The second rotating motor 710 is fixed to the support plate.

[0034] After the arch rib is placed on the adjusting mechanism, the baffles 708 on both sides are respectively located on both sides of the arch rib, and the second rotating motor 710 is turned on to drive the roller, and the roller drives the rectangular sleeve 707 and the baffle 708 in turn, so that the central axis of the rectangular sleeve 707 rotates to be parallel to the cross-section of the end faces of the arch rib, and the baffle 708 blocks and limits the arch rib to prevent it from slipping from either end during the arch rib hoisting process; at the same time, when the adjusting mechanism drives either end of the arch rib to tilt up, the second rotating motors 710 at both ends of the arch rib are turned on to drive the roller, the rectangular sleeve 707, and the baffle 708, so that the baffle 708 is parallel to the cross-section of the end faces of the arch rib. The surface is adjusted accordingly so that the barrier 708 blocks the arch rib during the tilting process. At the same time, in the process of closing and splicing the upper arch rib of the adjustment mechanism and the previous arch rib, the two arch ribs approach each other, and in the process of close splicing the arch ribs, the two arch ribs squeeze the wedge surface of the barrier 708 against each other, and the barrier 708 slides relatively along the central axis of the rectangular sleeve 707. The barrier 708 squeezes the compression spring 709 and retracts it into the rectangular sleeve 707, so that the barrier 708 always keeps blocking the arch rib before the upper arch rib of the adjustment mechanism and the previous arch rib are completed closed and spliced, to prevent the arch rib from slipping during the closing process.

[0035] In order to facilitate the support and clamping of arch ribs of various curvatures and different widths, the clamping components include fixed strips 711, which are fixed to the support seats 705, and are coaxially placed with the slide rail shaft 1. The upper end surfaces of the fixed strips 711 are fixed with coaxially placed rubber plates 712, and the rubber plates 712 can be elastically retracted. A pair of plywood 713 symmetrically placed along the axis of the slide rail shaft 1 are slidably clamped on the fixed strips 711, and the plywood 713 is provided with a through slot, and the rubber plates 712 can pass through the through slot. A driving unit that drives the two plywood 713 to move closer to or away from each other is provided between the support seat 705 and the fixed strips 711;

[0036] After the arch rib is placed on the adjustment mechanism, the arch rib squeezes and compresses the rubber plate 712. The rubber plate 712 is compressed accordingly according to the curvature of the arch rib, so that it can stably support arch ribs of various curvature specifications.

[0037] Then, the driving unit controls the two clamping plates 713 in the two clamping assemblies to move closer to each other, so that the two clamping plates 713 clamp the arch ribs, so as to be suitable for clamping and fixing arch ribs of various width specifications.

[0038] The gears 714 are arranged on the same axis as the gears 715, and the gears 714 are arranged on the same axis as the gears 715. The gears 714 are arranged on the same axis as the gears 715, and the gears 714 are arranged on the same axis as the gears 715.

[0039] The telescopic cylinder 716 is extended and retracted to drive the spur rack 715, which in turn drives the gear 714 and another spur rack 715, and the spur rack 715 drives the clamping plate 713 through the connecting piece, thereby controlling the clamping plates 713 on both sides to move closer or farther away from each other.

[0040] In order to facilitate the support and lifting of arch ribs of different lengths, the placement plates 701 are all provided with coaxially placed fourth slide grooves, the lower ends of the sleeves 702 are all located directly above the fourth slide grooves, the lower ends of the sleeves 702 are all fixed with sliders 717, the sliders 717 are all slidably engaged in the fourth slide grooves, and the fourth slide grooves are rotatably connected with coaxially placed second threaded rods 718, and the second threaded rods 718 are located on both sides of the symmetrical plane of the two sleeves 702 with opposite thread directions, the sliders 717 are all sleeved on the second threaded rods 718 and engaged with their threads, and the placement plates 701 are all provided with third rotating motors 719 that drive the second threaded rods 718 to rotate;

[0041] The third rotating motor 719 is turned on to drive the second threaded rod 718, and the second threaded rod 718 drives the slider 717 to perform thread engagement transmission. The distance between the two sleeves 702 in each adjustment mechanism is adjusted to adapt to the support and lifting of end arch ribs of various lengths.

[0042] The lifting mechanism 302 is fixed on the lifting platform 302, and the lifting mechanism 303 is fixed on the lifting platform 302.

[0043] In order to facilitate the closing and installation of the edge arch ribs on both sides of bridge decks of various widths, a dual-axis rotating motor is fixedly installed in the slide rail shaft 1, and the output ends of the dual-axis rotating motor are connected to the fourth threaded rod 10. The fourth threaded rod 10 is placed coaxially with the slide rail shaft 1, and the thread directions of the two fourth threaded rods 10 are placed in opposite directions. The fourth threaded rod 10 passes through the slide 2 and is threadedly connected to the slide 2; the fourth threaded rod 10 is driven by the dual-axis rotating motor, and the fourth threaded rod 10 drives the slide 2 to perform threaded engagement transmission, thereby controlling the two slides 2 to approach or move away from each other, thereby realizing the closing and installation of the edge arch ribs on both sides of bridge decks of various widths.

[0044] In order to facilitate the lifting and lowering of the adjustment mechanism, the lifting mechanism includes a hanging platform 901, and the hanging platforms 901 are fixed to the connecting block 4. A pair of symmetrically placed fifth rotating motors 902 are fixed on the hanging platform 901. The output ends of the fifth rotating motors 902 are provided with rotating shafts, and one end of the rotating shafts is connected to a differential 903. The differentials 903 are fixed to the hanging platform 901, and the rotating shafts are connected to the input ends of the differentials 903. A winding roller 904 is connected between the output ends of the two differentials 903. The winding rollers 904 are coaxially placed with the second threaded rod 718, and differentials 903 are provided at both ends of the winding rollers 904. The differentials 903 are fixedly placed on the hanging platform 901, and the winding rollers 904 are connected to the output ends of the differentials 903. A pair of winding wheels are fixed on the winding roller 904, and rope grooves are provided on the hanging platform 901. The pull ropes 8 pass through the rope grooves and are fixed to the winding wheels. Multiple sets of locking components 905 are fixed on the hanging platform 901. The locking component 905 is used to lock the input end of the differential 903; turn on the fifth rotating motor 902, and through the action of the differential 903, the output end of the differential 903 drives the winding roller 904 and the winding wheel to slowly and steadily reel in the pull rope 8. The pull rope 8 is reeled in and pulls the first sliding plate 6 and the adjusting mechanism, so that the adjusting mechanism drives the arch rib to move up. When the arch rib is hoisted and moved to the desired position, the differential 903 input end of the locking component 905 is used to lock the brake to prevent the pull rope 8 from loosening when the arch rib is closed.

[0045] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A steel tube arch bridge arch rib closing device, comprising a slide rail shaft (1), characterized in that: A pair of symmetrically placed slide seats (2) are slidably engaged in the slide rail shaft (1), a vertically placed support shaft group (300) is fixed on each of the slide seats (2), a connecting block (4) is fixed on the upper end of each of the support shaft groups (300), a fixing plate is fixed near the bottom of each of the support shaft groups (300), and a vertically placed limit rod (5) is fixed between the fixing plate and the connecting block (4); A vertically placed first sliding groove is provided on one side of the support shaft group (300) close to the limit rod (5), a first sliding plate (6) is slidably connected in the first sliding groove, the first sliding plate (6) is sleeved on the limit rod (5) and slidably connected thereto, an adjustment mechanism is fixedly provided on the first sliding plate (6), a pair of pull ropes (8) are fixed on the first sliding plate (6), a hoisting mechanism is fixed on the upper end of the connecting block (4), the hoisting mechanism is connected to the pull rope (8) on the corresponding side, and the hoisting mechanism can reel in the pull rope (8); The adjusting mechanism includes a placement plate (701), the placement plate (701) is fixed to the first sliding plate (6), a pair of vertically placed sleeves (702) with open upper ends are fixed on the placement plate (701), and the planes where the central axes of the two sleeves (702) are located are vertically placed with the slide rail shaft (1), a first threaded rod (703) is rotatably connected in the sleeve (702), a threaded top shaft (704) is sleeved on the first threaded rod (703), the top shaft (704) is sleeved inside the sleeve (702) and slidably engaged with the inner wall of the sleeve (702), a first rotating motor for driving the first threaded rod (703) is fixed on the inner bottom surface of the sleeve (702), a support seat (705) is fixed on the upper end of the top shaft (704), and a clamping assembly is fixed on the support seat (705); The side walls of the sleeves (702) are provided with second sliding grooves placed coaxially, and the second sliding grooves are located on the side away from each other of the two sleeves (702), and the top shaft (704) is fixed with a second sliding plate (706), and the second sliding plate (706) passes through the second sliding groove and is slidably engaged with the second sliding groove, and a pair of support plates are fixed on the second sliding plate (706), and rollers are rotatably connected between the support plates, and the rollers are placed coaxially with the slide rail shaft (1), and rectangular sleeves (707) are fixed on the side walls of the rollers, and the rectangular sleeves (707) can be vertically The rotating roller rotates around the central axis of the rotating roller in a plane, and a sliding blocking member (708) is provided in the rectangular sleeve (707). A spring (709) is placed coaxially in the rectangular sleeve (707), one end of the spring (709) is fixed to the rotating roller, and the other end of the spring (709) is fixed to the blocking member (708). The side walls of the blocking member (708) on both sides away from one end of the rectangular sleeve (707) are wedge-shaped. The rotating roller is connected to a second rotating motor (710) for driving the rotating roller, and the second rotating motor (710) is fixed to the support plate.

2. The arch rib closing device for a steel tube arch bridge according to claim 1, characterized in that: The clamping components all include fixed strips (711), the fixed strips (711) are all fixed to the support seat (705), the fixed strips (711) are all coaxially placed with the slide rail shaft (1), the upper end surface of the fixed strips (711) is fixed with a coaxially placed rubber plate (712), the rubber plate (712) can be elastically retracted, and the fixed strips (711) are all slidably clamped with a pair of splints (713) symmetrically placed along the axial direction of the slide rail shaft (1), the splints (713) are all provided with through slots, and the rubber plates (712) can pass through the through slots, and a driving unit for driving the two splints (713) to move closer to or away from each other is provided between the support seat (705) and the fixed strips (711).

3. The steel tube arch bridge arch rib closing device according to claim 2, characterized in that: The driving units all include a gear (714) rotatably connected to the lower end surface of the fixed strip (711), the central axis of the gear (714) is vertically placed, and the gear (714) is meshed with a pair of straight racks (715) placed centrally and symmetrically about the central axis thereof, and the straight racks (715) are coaxially placed with the slide rail groove, and the fixed strip (711) is provided with a third sliding groove corresponding to the straight rack (715), and the straight racks (715) are slidably connected with the corresponding third sliding groove, and the straight racks (715) correspond to the clamping plate (713) one by one, and the clamping plate (713) is fixed with a connecting piece, and the connecting piece passes through the third sliding groove and is fixed to the corresponding straight rack (715), and the lower end of the fixed strip (711) is fixedly provided with a telescopic cylinder (716) placed coaxially, and the output end of the telescopic cylinder (716) is fixed to any straight rack (715).

4. The arch rib closing device for a steel tube arch bridge according to claim 3, characterized in that: A fourth sliding groove placed coaxially is provided on the placement plate (701), the lower end of the sleeve (702) is located directly above the fourth sliding groove, a slider (717) is fixed to the lower end of the sleeve (702), the slider (717) is slidably engaged in the fourth sliding groove, a second threaded rod (718) placed coaxially is rotatably connected in the fourth sliding groove, and the second threaded rod (718) is located on both sides of the symmetry plane of the two sleeves (702) with opposite thread directions, the slider (717) is sleeved on the second threaded rod (718) and is threadedly engaged with it, and a third rotating motor (719) is provided on the placement plate (701) for driving the second threaded rod (718) to rotate.

5. The arch rib closing device for a steel tube arch bridge according to claim 1, characterized in that: The limiting rods (5) are all configured to be retractable, the support shaft group (300) includes a lower support shaft (301), an upper support shaft (302) that is slidably engaged is sleeved inside the lower support shaft (301), the connecting blocks (4) are all fixed to the upper end of the upper support shaft (302), a third threaded rod (303) placed coaxially is rotatably connected inside the lower support shaft (301), the upper support shafts (302) are all sleeved on the third threaded rod (303) and are threadedly engaged with the third threaded rod (303), and a fourth rotating motor that drives the third threaded rod (303) to rotate is fixedly installed in the slide seat (2).

6. The arch rib closing device for a steel tube arch bridge according to claim 1, characterized in that: A dual-axis rotating motor is fixedly installed in the slide rail shaft (1), and the output ends of the dual-axis rotating motors are connected to fourth threaded rods (10). The fourth threaded rods (10) are coaxially placed with the slide rail shaft (1), and the thread directions of the two fourth threaded rods (10) are in opposite placement states. The fourth threaded rods (10) pass through the slide seat (2) and are threadedly engaged with the slide seat (2).

7. The arch rib closing device for a steel tube arch bridge according to claim 5, characterized in that: The hoisting mechanism includes a hoisting platform (901), the hoisting platforms (901) are fixed to the connecting block (4), a pair of symmetrically placed fifth rotating motors (902) are fixed on the hoisting platform (901), the output ends of the fifth rotating motors (902) are provided with rotating shafts, one end of the rotating shafts is connected to a differential (903), the differentials (903) are fixed to the hoisting platform (901), the rotating shafts are connected to the input ends of the differentials (903), a winding roller (904) is connected between the output ends of the two differentials (903), and the winding rollers (904) are connected to the second threaded rod ( 718) are coaxially arranged, and a differential (903) is provided at both ends of the winding roller (904), and the differential (903) is fixedly placed on the hanging platform (901), and the winding roller (904) is connected to the output end of the differential (903), and a pair of winding wheels are fixed on the winding roller (904), and a rope groove is provided on the hanging platform (901), and the pull rope (8) passes through the rope groove and is fixed to the winding wheel, and a plurality of locking assemblies (905) are fixed on the hanging platform (901), and the locking assemblies (905) are used to lock the input end of the differential (903).

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