A lifting device for railway bridge arch rib

Abstract

The present invention discloses a lifting device for an arch rib of a railway bridge, comprising a steel truss, a lifting cable is arranged between the steel trusses, a lifting device is slidably connected to the lifting cable, both sides of the steel truss are respectively fixed to the arch seat and the arch rib under construction by pre-tensioned cables, at least three lifting cables are arranged between the steel trusses, a plurality of positioning wheel groups are arranged on the lifting device, the lifting device is respectively slidably connected to the lifting cable by the positioning wheel groups, a lifting mechanism is arranged at the bottom of the lifting device; and winches are respectively connected to the two ends of the lifting device by pull ropes. The plurality of lifting cables can work together to prevent the lifting device from rotating and shaking around the lifting cables due to wind and other reasons, thereby greatly improving the stability during the lifting process and facilitating manual adjustment and positioning; after reducing the shaking amplitude, the wear of the lifting device and the lifting cable can be greatly reduced, thereby improving the safety during the lifting process.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and more particularly to a lifting device for an arch rib of a railway bridge. Background Art

[0002] A top-supported arch bridge is a bridge whose deck is set above the main load-bearing structure of the bridge span (i.e., the arch ribs). Both ends of the arch ribs of a top-supported arch bridge are supported on arch seats.

[0003] The arch rib is also called the main arch or arch ring. During the construction of the arch rib, a steel truss is usually pre-erected on the arch seat, and cables are pulled on the steel truss brackets. The cables drive the lifting equipment and the arch rib segment to be installed to the designated position for installation. The specific operation is shown in the utility model patent with patent number CN210684480U. The lifting equipment is usually slidably connected to a cable and slides left and right driven by a winch. However, since the locations where bridges are erected are mostly valleys or river valleys, airflow changes frequently and crosswinds are large. During the lifting process, the arch rib segment often shakes due to the influence of wind, and the frequent shaking will increase the wear between the lifting equipment and the cable, posing a great safety hazard to the installers at the bottom.

[0004] Moreover, since the existing lifting equipment is only slidably connected to a cable, it is difficult to adjust the position of the arch rib segment during the lifting and installation process. Manpower needs to use traditional methods such as hand winches, which is not only time-consuming and labor-intensive, but also highly dangerous.

[0005] Therefore, a novel lifting device for the arch rib of a railway bridge is needed to solve the above problems. Summary of the invention

[0006] An object of the present invention is to provide a new technical solution for a railway bridge arch rib lifting device.

[0007] According to a first aspect of the present invention, there is provided a lifting device for an arch rib of a railway bridge, comprising steel trusses, lifting cables being arranged between the steel trusses, a lifting device being slidably connected to the lifting cables, both sides of the steel trusses being fixed to an arch seat and an arch rib under construction respectively by means of pre-tensioned cables, at least three lifting cables being arranged between the steel trusses, a plurality of positioning wheel groups being arranged on the lifting device, the lifting device being respectively slidably connected to the lifting cables by means of the positioning wheel groups, a lifting mechanism being arranged at the bottom of the lifting device; both ends of the lifting device being respectively connected to winches by means of pull ropes.

[0008] Through this solution, several lifting cables can work together to prevent the lifting device from rotating and shaking around the lifting cables due to wind and other reasons, thereby greatly improving the stability during the lifting process and facilitating manual adjustment and positioning; reducing the amplitude of the shaking can greatly reduce the wear of the lifting device and lifting cables, thereby improving the safety during the lifting process.

[0009] Preferably, the hoisting device comprises two mounting plates parallel to each other, the positioning wheel sets are fixed between the mounting plates; and the lifting mechanism is fixed to the mounting plates.

[0010] Through this solution, the mounting plate and the positioning wheel group form a closed structure, and the lifting cable can avoid falling off in the closed structure, thereby improving the safety during the lifting process.

[0011] Preferably, the lifting cable includes two adjusting cables arranged vertically and two stabilizing cables arranged horizontally between the adjusting cables, and the positioning wheel group includes adjusting wheels corresponding one-to-one to the adjusting cables and a stabilizing wheel group corresponding one-to-one to the stabilizing cables.

[0012] Through this solution, the four lifting cables are arranged in a quadrilateral, which can greatly improve the stability of the lifting device and reduce its rotation amplitude; the two adjusting cables can reduce its rotation in the vertical plane, and the two stabilizing cables can reduce its rotation in the horizontal plane.

[0013] Preferably, a lateral adjustment mechanism is installed between the mounting plates, and the lateral adjustment mechanism includes an adjusting screw and a driving motor, the adjusting screw is arranged perpendicular to the adjusting cable, the adjusting wheel is threadedly connected to the adjusting screw, and the adjusting motor can drive the adjusting screw to rotate to drive the adjusting wheel to move laterally.

[0014] Through this solution, the adjusting screw drives the adjusting wheel to move left and right, so that the lifting device can adjust its own angle to compensate for the rotation angle of the lifting device under the action of crosswind, further improving the stability of its own angle, ensuring the position accuracy of the arch rib segment, facilitating installation, and improving safety.

[0015] Preferably, a sliding rod is arranged parallel to the adjusting screw, and the adjusting wheel is slidably connected to the sliding rod; the adjusting wheel includes a wheel body and an anti-slip shell, the wheel body is rotatably connected to the anti-slip shell, the anti-slip shell is slidably connected to the sliding rod, and the anti-slip shell is threadedly connected to the adjusting screw.

[0016] Through this solution, the adjusting cable is located between the wheel body and the anti-slip shell, which can prevent the adjusting cable from slipping out of the groove; and the connection between the adjusting screw and the anti-slip shell can realize the lateral sliding adjustment of the adjusting wheel while avoiding affecting the rotation of the wheel body itself.

[0017] Preferably, the slide rod is arranged directly below the adjusting screw, a thread groove is provided on the top of the anti-dropping housing, and the adjusting screw is engaged with the thread groove; the diameter of the adjusting screw is larger than the diameter of the adjusting wheel.

[0018] Through this solution, the adjusting screw can play a reinforcing role, improve the load-bearing capacity of the lifting device, and prevent the sliding rod from being bent and damaged due to excessive force; the threaded groove is arranged on the outside of the anti-slip shell to engage with the adjusting screw, which helps to reduce the volume of the adjusting wheel and reduce the weight, thereby reducing the load-bearing capacity of the lifting cable and improving safety.

[0019] Preferably, the adjusting screws correspond to the adjusting wheels one by one, the driving motor drives the two adjusting screws to rotate synchronously through a transmission chain, and the spiral directions of the two adjusting screws are opposite.

[0020] Through this solution, the drive motor can simultaneously drive the two adjusting screws to rotate in opposite directions, thereby increasing the rotation amplitude and alignment efficiency of the lifting device; at the same time, a single drive motor can reduce the weight and equipment cost of the lifting device.

[0021] Preferably, the stabilizing wheel assembly comprises two stabilizing wheels, and the two stabilizing wheels are arranged opposite to each other up and down to clamp the stabilizing cable.

[0022] Through this solution, the stabilizing wheel clamps the stabilizing cable to prevent the stabilizing cable from coming out of the groove, thereby improving stability and reliability.

[0023] Preferably, the lifting mechanism comprises a reel and a lifting motor, the reel is arranged parallel to the lifting cable, two reels are axially fixed on the reel, the lifting motor drives the reel to rotate, and the lifting cables are respectively wound around the reels.

[0024] Through this solution, the two reels are driven by the same lifting motor to drive the two slings to rise and fall simultaneously, which helps to improve the synchronization of the lifting and falling of the two ends of the arch rib section.

[0025] Preferably, the lifting mechanism is provided with two sets, the two reels are rotatably connected to the outer sides of the two mounting plates respectively, and the lifting motor is arranged between the mounting plates and connected to the reels via a synchronous belt.

[0026] Through this solution, the two sets of lifting mechanisms are respectively hoisted to the two sides of the arch rib segment, and the difference in their lifting can assist in realizing the axial rotation adjustment of the arch rib segment to adapt to the deviation during the installation process; if they are hung to the top middle of the arch rib segment at the same time, the lifting mechanisms on both sides can be operated separately to realize the fine adjustment of the left and right positions of the arch rib segment, so as to facilitate adjustment and installation, and compensate for the lateral displacement deviation under the action of crosswind.

[0027] According to an embodiment of the present disclosure, the device has a simple and practical structure, which can not only greatly reduce the impact of crosswinds and reduce the deflection angle of the lifting device itself; but also the lifting device can adjust and compensate its own angle, further improve the stability during the lifting process, and reduce the lateral displacement deviation of the arch rib segment; the lifting mechanism at the bottom can also perform lateral fine-tuning on the lifted arch rib segment to facilitate adjustment and installation.

[0028] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0030] Figure 1 It is a structural schematic diagram of a lifting device for a railway bridge arch rib according to an embodiment of the present invention.

[0031] Figure 2 yes Figure 1 Schematic diagram of the main structure of the central lifting device.

[0032] Figure 3 yes Figure 2 Schematic diagram of the side view structure of the central lifting device.

[0033] Figure 4 yes Figure 3 Schematic diagram of the position structure of the middle lateral adjustment mechanism and the adjustment wheel.

[0034] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle adjusting wheel.

[0035] Figure 6 yes Figure 5 Schematic diagram of the main structure of the middle adjustment wheel.

[0036] Figure 7 yes Figure 3 Schematic diagram of the position structure of the middle scroll. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] Example

[0043] like Figures 1 to 7 As shown, the lifting device of the arch rib of the railway bridge in this embodiment includes a steel truss 100, a lifting cable 120 is arranged between the steel trusses 100, and a lifting device 200 is slidably connected to the lifting cable 120, and both sides of the steel truss 100 are respectively fixed to the arch seat 12 and the arch rib 1 under construction by pre-tensioned cables 110, at least three lifting cables 120 are arranged between the steel trusses 100, and a plurality of positioning wheel groups are arranged on the lifting device 200, and the lifting device 200 is respectively slidably connected to the lifting cables 120 through the positioning wheel groups, and a lifting mechanism 240 is arranged at the bottom of the lifting device 200; both ends of the lifting device 200 are respectively connected to a winch (not shown in the figure) through a pull rope, and the winch is fixed to the steel truss 100 to reduce the weight of the lifting device 200.

[0044] Through the scheme of this embodiment, several lifting cables 120 can work together to prevent the lifting device 200 from rotating and shaking around the lifting cable 120 due to wind and other reasons, thereby greatly improving the stability during the lifting process and facilitating manual adjustment and positioning; reducing the amplitude of the shaking can greatly reduce the wear of the lifting device 200 and the lifting cable 120, thereby improving the safety during the lifting process.

[0045] In this embodiment or other embodiments, the lifting device 200 includes two mounting plates 210 parallel to each other, the positioning wheel groups are fixed between the mounting plates 210, the mounting plates 210 and the positioning wheel groups form a closed structure, and the lifting cable 120 can avoid falling off in the closed structure, thereby improving the safety during the lifting process; the lifting mechanism 240 is fixed to the mounting plates 210 to improve the firmness of the installation.

[0046] In this embodiment or other embodiments, the hoisting cables 120 include two adjusting cables 121 arranged vertically and two stabilizing cables 122 arranged horizontally between the adjusting cables 120, and the positioning wheel group includes an adjusting wheel 220 corresponding to the adjusting cables 121 and a stabilizing wheel group 230 corresponding to the stabilizing cables 122. The four hoisting cables 120 are arranged in a quadrilateral shape, which can greatly improve the stability of the hoisting device 200 and reduce its rotation amplitude; the two adjusting cables 121 can reduce its rotation in the vertical plane, and the two stabilizing cables 122 can reduce its rotation in the horizontal plane.

[0047] In this embodiment or other embodiments, a lateral adjustment mechanism 250 is installed between the mounting plates 210. The lateral adjustment mechanism 250 includes an adjusting screw 252 and a driving motor 251. The adjusting screw 252 is arranged perpendicular to the adjusting cable 121. The adjusting wheel 220 is threadedly connected to the adjusting screw 252. The adjusting motor 251 can drive the adjusting screw 252 to rotate to drive the adjusting wheel 220 to move laterally.

[0048] The adjusting screw 252 drives the adjusting wheel 220 to move left and right. Since the adjusting wheel 220 is located on the upper and lower sides, the lifting device 200 can adjust its own angle to compensate for the rotation angle of the lifting device 200 under the action of crosswind, further improving the stability of its own angle, ensuring the position accuracy of the arch rib segment 11, facilitating installation, and improving safety.

[0049] In this embodiment or other embodiments, a sliding rod 225 is arranged parallel to the adjusting screw 252, and the adjusting wheel 220 is slidably connected to the sliding rod 225; the adjusting wheel 220 includes a wheel body 221 and an anti-slip shell 222, the wheel body 221 is rotatably connected to the anti-slip shell 222, the anti-slip shell 220 is slidably connected to the sliding rod 225, and the anti-slip shell 222 is threadedly connected to the adjusting screw 252.

[0050] The anti-slip shell 222 is a U-shaped groove structure, and the wheel body 221 is rotatably connected to the U-shaped groove. The adjusting cable 121 is located between the wheel body 221 and the bottom of the U-shaped groove, which can prevent the adjusting cable 121 from slipping out of the groove; and the connection between the adjusting screw 252 and the anti-slip shell 222 can realize the lateral sliding adjustment of the adjusting wheel 220 while avoiding affecting the rotation of the wheel body 221 itself.

[0051] The anti-dropping housing 222 in this embodiment is provided with a groove inside, which matches the wheel groove on the wheel body 221 and together limits the adjustment cable 121. A wear-resistant layer is fixed in the groove to increase the service life.

[0052] In this embodiment or other embodiments, the slide bar 225 is arranged directly below the adjusting screw 252, and a thread groove 223 is provided on the top of the anti-slip housing 222, and the adjusting screw 252 is meshed with the thread groove 223; the diameter of the adjusting screw 252 is larger than the diameter of the adjusting wheel 221. The adjusting screw 252 can strengthen the slide bar 225, improve the load-bearing capacity of the hoisting device 200, and prevent the slide bar 225 from being bent and damaged due to excessive force; the thread groove 223 is provided on the outside of the anti-slip housing 222 and meshes with the adjusting screw 252, which helps to reduce the volume and weight of the adjusting wheel 220, thereby reducing the load-bearing of the hoisting cable 120 and improving safety.

[0053] The top of the anti-slip housing 222 in this embodiment is recessed to form a positioning groove 224, and the threaded groove 223 is arranged in the positioning groove 224. The adjusting screw 252 and the sliding rod 225 clamp the adjusting wheel 220, which can limit the angle of the adjusting wheel 220 and prevent it from rotating around the sliding rod 225.

[0054] In this embodiment or other embodiments, the adjusting screws 252 correspond to the adjusting wheels 220 one by one, and the driving motor 251 drives the two adjusting screws 252 to rotate synchronously through a transmission chain, and the spiral directions of the two adjusting screws 252 are opposite. The driving motor 251 can simultaneously drive the two adjusting screws 252 to rotate in opposite directions, thereby increasing the rotation amplitude and straightening efficiency of the hoisting device 200; at the same time, a single driving motor 251 can reduce the weight and equipment cost of the hoisting device 200.

[0055] In this embodiment or other embodiments, the stabilizing wheel set 230 includes two stabilizing wheels 231, which are arranged opposite to each other up and down to clamp the stabilizing cable 122. The stabilizing wheels 231 clamp the stabilizing cable 122 to prevent the stabilizing cable 122 from being out of the groove, thereby improving stability and reliability.

[0056] In this embodiment or other embodiments, the lifting mechanism 240 includes a reel 242 and a lifting motor 241. The reel 242 is arranged parallel to the hoisting cable 120. Two reels 243 are fixed axially on the reel 242. The lifting motor 241 drives the reel 242 to rotate. Lifting cables are respectively wound on the reels 243. The two reels 243 are driven by the same lifting motor 241 to drive the two lifting cables 243 to rise and fall at the same time, which helps to improve the synchronization of the lifting and falling of the two ends of the arch rib segment 11.

[0057] In this embodiment or other embodiments, the lifting mechanism 240 is provided with two sets, the two reels 242 are rotatably connected to the outer sides of the two mounting plates 210 respectively, and the lifting motor 241 is arranged between the mounting plates 210 and connected to the reels 242 through a synchronous belt.

[0058] The two sets of lifting mechanisms 240 are respectively hoisted to the two sides of the arch rib segment 11, and the difference in their lifting can assist in realizing the axial rotation adjustment of the arch rib segment 11 to adapt to the angular deviation during the installation process; if they are hung to the top middle of the arch rib segment 11 at the same time, the lifting mechanisms 240 on both sides can be operated separately to realize the fine adjustment of the left and right positions of the arch rib segment 11 to facilitate adjustment and installation, and compensate for the lateral displacement deviation under the action of crosswind.

[0059] According to this embodiment, the device has a simple and practical structure, which can not only greatly reduce the impact of crosswinds and reduce the deflection angle of the lifting device itself; but also the lifting device can adjust and compensate its own angle, further improve the stability during the lifting process, and reduce the lateral displacement deviation of the arch rib segment; the lifting mechanism at the bottom can also perform lateral fine-tuning on the lifted arch rib segment to facilitate adjustment and installation.

[0060] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A lifting device for an arch rib of a railway bridge, comprising a steel truss, a lifting cable is arranged between the steel trusses, a lifting device is slidably connected to the lifting cable, and both sides of the steel truss are respectively fixed to the arch seat and the arch rib under construction by pre-tensioned cables, characterized in that: The lifting cables are arranged between the steel trusses, and the lifting cables include two adjusting cables arranged up and down and two stabilizing cables arranged horizontally between the adjusting cables. The four lifting cables are arranged in a quadrilateral; the two adjusting cables can reduce their rotation in the vertical plane, and the two stabilizing cables can reduce their rotation in the horizontal plane; the positioning wheel group includes adjusting wheels corresponding to the adjusting cables one by one and stabilizing wheel groups corresponding to the stabilizing cables one by one; a lateral adjustment mechanism is installed between the mounting plates, and the lateral adjustment mechanism includes an adjusting screw and a driving motor, the adjusting screw is arranged perpendicular to the adjusting cables, the adjusting wheel is threadedly connected to the adjusting screw, and the adjusting motor can drive the adjusting screw to rotate The cam is provided with a plurality of positioning wheel groups, and the positioning wheel groups are respectively connected with the lifting cable through the positioning wheel groups, and a lifting mechanism is provided at the bottom of the cam; The cam is provided with a plurality of positioning wheel groups, and the plurality of positioning wheel groups are connected with the plurality of lifting cables through the positioning wheel groups.

2. The lifting device for the railway bridge arch rib according to claim 1, characterized in that: The hoisting device comprises two mounting plates which are parallel to each other, the positioning wheel sets are fixed between the mounting plates; and the lifting mechanism is fixed to the mounting plates.

3. The lifting device for the railway bridge arch rib according to claim 2, characterized in that: The slide bar is arranged directly below the adjusting screw, a thread groove is provided on the top of the anti-dropping housing, and the adjusting screw is meshed with the thread groove; the diameter of the adjusting screw is greater than the diameter of the adjusting wheel.

4. The lifting device for the railway bridge arch rib according to claim 3, characterized in that: The adjusting screws correspond to the adjusting wheels one by one, and the driving motor drives the two adjusting screws to rotate synchronously through a transmission chain, and the spiral directions of the two adjusting screws are opposite.

5. The lifting device for the railway bridge arch rib according to claim 3, characterized in that: The stabilizing wheel assembly includes two stabilizing wheels, which are arranged opposite to each other up and down to clamp the stabilizing cable.

6. The lifting device for the railway bridge arch rib according to claim 3, characterized in that: The lifting mechanism includes a reel and a lifting motor. The reel is arranged parallel to the lifting cable. Two reels are axially fixed on the reel. The lifting motor drives the reel to rotate. Lifting cables are respectively wound around the reels.

7. The lifting device for the railway bridge arch rib according to claim 6, characterized in that: The lifting mechanism is provided with two sets, the two reels are rotatably connected to the outer sides of the two mounting plates respectively, and the lifting motor is arranged between the mounting plates and connected to the reels via a synchronous belt.

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