CN114476973A

CN114476973A - Hoisting device for railway bridge arch rib

Info

Publication number: CN114476973A
Application number: CN202210070961.4A
Authority: CN
Inventors: 刘坤; 王泽刚; 高峰立; 张晋君; 肖虹强; 张立华
Original assignee: Fourth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
Current assignee: Fourth Engineering Co Ltd of China Railway 20th Bureau Group Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-05-13

Abstract

The invention discloses a hoisting device for railway bridge arch ribs, which comprises steel trusses, wherein hoisting cables are arranged between the steel trusses, hoisting devices are connected onto the hoisting cables in a sliding manner, two sides of each steel truss are respectively fixed onto an arch support and the arch ribs in construction through pre-tensioning cables, at least three hoisting cables are arranged between the steel trusses, a plurality of positioning wheel sets are arranged on the hoisting devices, the hoisting devices are respectively connected with the hoisting cables in a sliding manner through the positioning wheel sets, and a lifting mechanism is arranged at the bottom of each hoisting device; and two ends of the hoisting device are respectively connected with a winch through a pull rope. The plurality of hoisting cables can act together, so that the hoisting device is prevented from rotating and shaking around the hoisting cables due to wind blowing and the like, the stability in the hoisting process is greatly improved, and manual adjustment and positioning are facilitated; after the shaking amplitude is reduced, the abrasion of the hoisting device and the hoisting cable can be greatly reduced, so that the safety in the hoisting process is improved.

Description

Hoisting device for railway bridge arch rib

Technical Field

The invention relates to the field of bridge construction, in particular to a hoisting device for a railway bridge arch rib.

Background

The deck arch bridge is a bridge with a bridge deck arranged above a bridge span main weighing structure (namely arch ribs), and both ends of the arch ribs of the deck arch bridge are supported on arch seats.

The arch rib is also called main arch or arch ring, and in the erection construction process of arch rib, erect the steel truss on the hunch seat in advance usually, draw at the steel truss support and establish the cable, drive hoisting equipment and wait to install by the cable and arrive the assigned position after and install, and concrete operation is shown as the utility model patent of patent No. CN210684480U, and hoisting equipment sliding connection is usually on a cable, and the horizontal slip is under the drive of hoist engine. However, the bridge is erected in a valley or a valley area, so that the airflow changes frequently and the cross wind is large. Often can cause the arch rib section to rock because of the influence of wind-force in the handling in-process to frequent rocking can increase the wearing and tearing between handling equipment and the cable, has caused very big potential safety hazard to the installer of bottom.

Moreover, the existing hoisting equipment is only connected to a cable in a sliding manner, the position of the arch rib section is difficult to adjust in the hoisting and installation process, the manpower is required to be carried out by means of traditional modes such as a chain block, the adjustment is time-consuming and labor-consuming, and the danger is high.

Therefore, a new lifting device for railway bridge arch rib is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a novel technical scheme of a hoisting device for a railway bridge arch rib.

According to a first aspect of the invention, a hoisting device for a railway bridge arch rib is provided, which comprises steel trusses, hoisting cables are arranged between the steel trusses, a hoisting device is connected on the hoisting cables in a sliding manner, two sides of each steel truss are respectively fixed on an arch abutment and the arch rib in construction through pre-tensioning cables, at least three hoisting cables are arranged between the steel trusses, a plurality of positioning wheel sets are arranged on the hoisting device, the hoisting device is respectively connected with the hoisting cables in a sliding manner through the positioning wheel sets, and a lifting mechanism is arranged at the bottom of the hoisting device; and two ends of the hoisting device are respectively connected with a winch through a pull rope.

Through the scheme, the plurality of hoisting cables can act together, and the hoisting device is prevented from rotating and shaking around the hoisting cables due to wind blowing and the like, so that the stability in the hoisting process is greatly improved, and manual adjustment and positioning are facilitated; after the shaking amplitude is reduced, the abrasion of the hoisting device and the hoisting cable can be greatly reduced, so that the safety in the hoisting process is improved.

Preferably, the hoisting device comprises two parallel mounting plates, and the positioning wheel sets are fixed between the mounting plates; the lifting mechanism is fixed to the mounting plate.

Through this scheme, the confined structure is enclosed with the location wheelset to the mounting panel, and the handling cable can avoid appearing the problem that drops in this confined structure, improves the security of handling in-process.

Preferably, the hoisting cable comprises two adjusting cables arranged up and down and two stabilizing cables arranged horizontally between the adjusting cables, and the positioning wheel set comprises adjusting wheels corresponding to the adjusting cables one to one and stabilizing wheel sets corresponding to the stabilizing cables one to one.

According to the scheme, the four hoisting cables are arranged in a quadrilateral manner, so that the stability of the hoisting device can be greatly improved, and the rotation amplitude of the hoisting device is reduced; the two adjusting cables can reduce the rotation of the adjusting cables in a vertical plane, and the two stabilizing cables can reduce the rotation of the adjusting cables in a horizontal plane.

Preferably, install horizontal adjustment mechanism between the mounting panel, horizontal adjustment mechanism includes adjusting screw and driving motor, the adjusting screw perpendicular to adjusting cable arranges, regulating wheel threaded connection to on the adjusting screw, adjusting motor can drive adjusting screw rotates in order to drive regulating wheel lateral shifting.

Through this scheme, adjusting screw drives and controls the regulating wheel and remove, can make hoist device adjust the angle of self to the compensation is hoist device's rotation angle under the crosswind effect, has further improved the stability of self angle, has guaranteed the position accuracy nature of encircleing the rib section, and is easy to assemble, has improved the security.

Preferably, a sliding rod is arranged parallel to the adjusting screw, and the adjusting wheel is connected to the sliding rod in a sliding manner; the regulating wheel includes wheel body and anticreep shell, the wheel body rotates to be connected to in the anticreep shell, anticreep shell sliding connection to on the slide bar, the anticreep shell with adjusting screw threaded connection.

Through the scheme, the adjusting cable is positioned between the wheel body and the anti-drop shell, so that the adjusting cable can be prevented from dropping out of the groove; and adjusting screw and anticreep shell be connected can realize avoiding influencing the rotation of wheel body self when the lateral sliding of adjusting wheel adjusts.

Preferably, the sliding rod is arranged right below the adjusting screw rod, a thread groove is formed in the top of the anti-falling shell, and the adjusting screw rod is meshed with the thread groove; the diameter of the adjusting screw is larger than that of the adjusting wheel.

Through the scheme, the adjusting screw can play a role in strengthening, the bearing capacity of the hoisting device is improved, and the sliding rod is prevented from being bent and damaged due to overlarge stress; the thread groove is arranged outside the anti-falling shell and meshed with the adjusting screw rod, the size of the adjusting wheel is reduced, the weight is reduced, the bearing of the hoisting cable is reduced, and the safety is improved.

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.

Through the scheme, the driving motor can simultaneously drive the two adjusting screw rods to rotate reversely, so that the rotating amplitude and the straightening efficiency of the hoisting device are improved; meanwhile, the weight and equipment cost of the hoisting device can be reduced by a single driving motor.

Preferably, the stabilizing wheel set comprises two stabilizing wheels arranged opposite one another above and below the stabilizing cable for clamping the stabilizing cable.

Through this scheme, the tight stabilising cable of stabilizer pulley clamp appears taking off the groove phenomenon in order to avoid stabilising cable, improves stability and reliability.

Preferably, the lifting mechanism comprises a reel and a lifting motor, the reel is parallel to the lifting cable, two reels are axially fixed on the reel, the lifting motor drives the reel to rotate, and slings are respectively wound on the reels.

Through this scheme, two reels are driven by same elevator motor to drive two hoist cables and go up and down simultaneously, help improving the synchronism that arch rib section both ends go up and down.

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

According to the scheme, two sets of lifting mechanisms are respectively lifted to two sides of the arch rib section, and the lifting difference can assist in realizing axial rotation adjustment of the arch rib section so as to adapt to deviation in the installation process; if the lifting mechanisms on the two sides are hung to the middle of the top of the arch rib section, fine adjustment of the left position and the right position of the arch rib section can be achieved through respective actions of the lifting mechanisms on the two sides, adjustment and installation are facilitated, and transverse displacement deviation under the action of transverse wind is compensated.

According to one embodiment of the disclosure, the device is simple and practical in structure, and not only can greatly reduce the influence of cross wind and reduce the deflection angle of the hoisting device; the hoisting device can adjust and compensate the angle of the hoisting device, so that the stability in the hoisting process is further improved, and the transverse displacement deviation of the arch rib section is reduced; the lifting mechanism at the bottom can also perform transverse fine adjustment on the lifted arch rib section so as to facilitate adjustment and installation.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a schematic structural diagram of a hoisting device for a railway bridge arch rib according to an embodiment of the invention.

Fig. 2 is a front view structure schematic diagram of the hoisting device in fig. 1.

Fig. 3 is a side view of the hoisting device in fig. 2.

Fig. 4 is a schematic view of the position structure of the lateral adjusting mechanism and the adjusting wheel in fig. 3.

Fig. 5 is a schematic view of the adjustment wheel of fig. 4.

Fig. 6 is a front view of the adjustment wheel of fig. 5.

Fig. 7 is a schematic view showing a positional structure of the reel in fig. 3.

Detailed Description

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 the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

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.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Examples

As shown in fig. 1 to 7, the hoisting device for the arch rib of the railroad bridge in the embodiment includes steel trusses 100, hoisting cables 120 are disposed between the steel trusses 100, hoisting devices 200 are slidably connected to the hoisting cables 120, two sides of each steel truss 100 are respectively fixed to an arch base 12 and an arch rib 1 under construction through pre-tensioning cables 110, at least three hoisting cables 120 are disposed between the steel trusses 100, the hoisting devices 200 are provided with a plurality of positioning wheel sets, the hoisting devices 200 are respectively slidably connected to the hoisting cables 120 through the positioning wheel sets, and a lifting mechanism 240 is disposed at the bottom of each hoisting device 200; two ends of the hoisting device 200 are respectively connected with a winch (not shown in the figure) through a pull rope, and the winches are fixed on the steel truss 100 to reduce the weight of the hoisting device 200.

Through the scheme of the embodiment, the plurality of hoisting cables 120 can act together, and the hoisting device 200 is prevented from rotating and shaking around the hoisting cables 120 due to wind blowing and the like, so that the stability in the hoisting process is greatly improved, and manual adjustment and positioning are facilitated; after the shaking amplitude is reduced, the abrasion of the hoisting device 200 and the hoisting cable 120 can be greatly reduced, so that the safety in the hoisting process is improved.

In this embodiment or other embodiments, the hoisting device 200 includes two parallel mounting plates 210, the positioning wheel sets are all fixed between the mounting plates 210, the mounting plates 210 and the positioning wheel sets enclose a closed structure, the hoisting cable 120 can avoid the problem of falling off in the closed structure, and the safety in the hoisting process is improved; the lifting mechanism 240 is fixed to the mounting plate 210 to improve the mounting firmness.

In this or other embodiments, the lifting cable 120 includes two adjusting cables 121 disposed one above the other and two stabilizing cables 122 disposed horizontally between the adjusting cables 120, and the positioning wheel set includes adjusting wheels 220 corresponding to the adjusting cables 121 one to one and stabilizing wheel sets 230 corresponding to the stabilizing cables 122 one to one. The four hoisting cables 120 are arranged in a quadrilateral manner, so that the stability of the hoisting device 200 can be greatly improved, and the rotation amplitude of the hoisting device is reduced; the two adjusting cables 121 reduce their rotation in the vertical plane and the two stabilizing cables 122 reduce their rotation in the horizontal plane.

In this embodiment or other embodiments, a transverse adjusting mechanism 250 is installed between the mounting plates 210, the transverse adjusting mechanism 250 includes an adjusting screw 252 and a driving motor 251, the adjusting screw 252 is disposed perpendicular to the adjusting cable 121, the adjusting wheel 220 is screwed to the adjusting screw 252, and the adjusting motor 251 can drive the adjusting screw 252 to rotate so as to drive the adjusting wheel 220 to move transversely.

Adjusting screw 252 drives regulating wheel 220 and moves about, because regulating wheel 220 is located both sides from top to bottom, consequently can make hoist device 200 adjust the angle of self to the compensation is hoist device 200's rotation angle under the crosswind effect, has further improved the stability of self angle, has guaranteed the position accuracy nature of arch rib section 11, and is easy to assemble, has improved the security.

In this embodiment or other embodiments, a sliding rod 225 is disposed parallel to the adjusting screw 252, and the adjusting wheel 220 is slidably connected to the sliding rod 225; the adjusting wheel 220 comprises a wheel body 221 and an anti-drop shell 222, the wheel body 221 is rotatably connected into the anti-drop shell 222, the anti-drop shell 220 is slidably connected to the sliding rod 225, and the anti-drop shell 222 is in threaded connection with the adjusting screw 252.

The anti-drop shell 222 is a U-shaped groove structure, the wheel body 221 is rotatably connected to the U-shaped groove, and the adjusting cable 121 is located between the wheel body 221 and the bottom of the U-shaped groove, so that the adjusting cable 121 can be prevented from dropping out of the groove; the connection between the adjusting screw 252 and the anti-drop casing 222 can realize the lateral sliding adjustment of the adjusting wheel 220, and simultaneously avoid influencing the rotation of the wheel body 221.

The inner side of the anti-drop casing 222 in this embodiment is provided with a groove, which matches with the wheel groove on the wheel body 221 to limit the adjusting cable 121. And a wear-resistant layer is fixed in the groove, so that the service life is prolonged.

In this embodiment or other embodiments, the sliding rod 225 is disposed directly below the adjusting screw 252, a threaded groove 223 is disposed on the top of the anti-falling shell 222, and the adjusting screw 252 is engaged with the threaded groove 223; the diameter of the adjusting screw 252 is larger than the diameter of the adjusting wheel 221. The adjusting screw 252 can play a role in reinforcing the sliding rod 225, so that the bearing capacity of the hoisting device 200 is improved, and the sliding rod 225 is prevented from being bent and damaged due to overlarge stress; the thread groove 223 is arranged outside the anti-drop shell 222 and meshed with the adjusting screw 252, which is helpful for reducing the volume of the adjusting wheel 220 and reducing the weight, thereby reducing the bearing of the hoisting cable 120 and improving the safety.

The top of the anti-slip casing 222 in this embodiment is recessed to form a positioning groove 224, a thread groove 223 is arranged in the positioning groove 224, and the adjusting screw 252 and the sliding rod 225 clamp the adjusting wheel 220, so that the angle of the adjusting wheel 220 can be limited and the adjusting wheel can be prevented from rotating around the sliding rod 225.

In this embodiment or other embodiments, the adjusting screws 252 correspond to the adjusting wheels 220 one by one, the driving motor 251 drives the two adjusting screws 252 to rotate synchronously through a transmission chain, and the screw directions of the two adjusting screws 252 are opposite. The driving motor 251 can simultaneously drive the two adjusting screws 252 to reversely rotate, so that the rotation amplitude and the straightening efficiency of the hoisting device 200 are improved; meanwhile, the single driving motor 251 can reduce the weight of the hoisting device 200 and the equipment cost.

In this or other embodiments, the stabilizing wheel set 230 includes two stabilizing wheels 231, and the two stabilizing wheels 231 are disposed opposite one another to clamp the stabilizing cable 122. The stabilizer wheel 231 clamps the stabilizer cable 122 to prevent the stabilizer cable 122 from being out of the groove, thereby improving stability and reliability.

In this embodiment or other embodiments, the lifting mechanism 240 includes a reel 242 and a lifting motor 241, the reel 242 is disposed parallel to the lifting cable 120, two reels 243 are axially fixed on the reel 242, the lifting motor 241 drives the reel 242 to rotate, and slings are respectively wound on the reels 243. The two winding wheels 243 are driven by the same lifting motor 241 to drive the two suspension cables 243 to lift simultaneously, which helps to improve the synchronism of the lifting of the two ends of the ribbed section 11.

In this embodiment or other embodiments, the lifting mechanism 240 is provided with two sets, two of the winding shafts 242 are respectively rotatably connected to the outer sides of the two mounting plates 210, and the lifting motor 241 is disposed between the mounting plates 210 and connected to the winding shafts 242 through a timing belt.

The two sets of lifting mechanisms 240 are respectively lifted to two sides of the arch rib section 11, and the lifting difference can assist in realizing axial rotation adjustment of the arch rib section 11 so as to adapt to angle deviation in the installation process; if the lifting mechanisms 240 on both sides are hung to the middle of the top of the arch rib section 11, the fine adjustment of the left and right positions of the arch rib section 11 can be realized by the respective actions of the lifting mechanisms 240 on both sides, so that the adjustment and installation are convenient, and the transverse displacement deviation under the action of transverse wind is compensated.

According to the embodiment, the device is simple and practical in structure, the influence of cross wind can be greatly reduced, and the deflection angle of the hoisting device is reduced; the hoisting device can adjust and compensate the angle of the hoisting device, so that the stability in the hoisting process is further improved, and the transverse displacement deviation of the arch rib section is reduced; the lifting mechanism at the bottom can also perform transverse fine adjustment on the lifted arch rib section so as to facilitate adjustment and installation.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A hoisting device for a railway bridge arch rib comprises steel trusses, hoisting cables are arranged between the steel trusses, hoisting devices are connected onto the hoisting cables in a sliding mode, two sides of each steel truss are fixed to an arch support and the arch rib in construction through pre-tensioning cables respectively, the hoisting device is characterized in that at least three hoisting cables are arranged between the steel trusses, a plurality of positioning wheel sets are arranged on the hoisting devices, the hoisting devices are connected with the hoisting cables in a sliding mode through the positioning wheel sets respectively, and a lifting mechanism is arranged at the bottom of each hoisting device; and two ends of the hoisting device are respectively connected with a winch through a pull rope.

2. A lifting device for a railway bridge arch rib according to claim 1, wherein the lifting device comprises two mounting plates parallel to each other, and the positioning wheel sets are fixed between the mounting plates; the lifting mechanism is fixed to the mounting plate.

3. The apparatus for lifting a rib of a railroad bridge as claimed in claim 2, wherein the lifting cable comprises two adjusting cables disposed one above the other and two stabilizing cables disposed horizontally between the adjusting cables, and the positioning wheel set comprises adjusting wheels corresponding to the adjusting cables one to one and stabilizing wheel sets corresponding to the stabilizing cables one to one.

4. A lifting device for a railway bridge arch rib according to claim 3, wherein a lateral adjustment mechanism is installed between the mounting plates, the lateral adjustment mechanism comprises an adjustment screw arranged perpendicular to the adjustment cable, and a driving motor, the adjustment wheel is screwed to the adjustment screw, and the adjustment motor can drive the adjustment screw to rotate so as to drive the adjustment wheel to move laterally.

5. A lifting device for a railway bridge arch rib according to claim 4, wherein a sliding rod is provided parallel to the adjusting screw, the adjusting wheel being slidably connected to the sliding rod; the regulating wheel includes wheel body and anticreep shell, the wheel body rotates to be connected to in the anticreep shell, anticreep shell sliding connection to on the slide bar, the anticreep shell with adjusting screw threaded connection.

6. The lifting device for the arched ribs of the railroad bridges as claimed in claim 5, wherein the slide rods are arranged right below the adjusting screw rods, and the top of the anti-drop shell is provided with threaded grooves, and the adjusting screw rods are engaged with the threaded grooves; the diameter of the adjusting screw is larger than that of the adjusting wheel.

7. The lifting device for the arched ribs of the railway bridge as claimed in claim 5, wherein 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.

8. A lifting device for a railway bridge arch rib according to claim 3, wherein the stabilising wheel set comprises two stabilising wheels arranged one above the other to grip the stabilising cable.

9. The lifting device for the arched ribs of the railroad bridges as claimed in claim 3, wherein the lifting mechanism comprises a reel and a lifting motor, the reel is arranged in parallel with the lifting cable, two reels are axially fixed on the reel, the lifting motor drives the reel to rotate, and slings are respectively wound on the reels.

10. The apparatus for lifting a railway bridge arch rib according to claim 9, wherein the lifting mechanism is provided in two sets, two of the reels are rotatably connected to the outer sides of the two mounting plates, respectively, and the lifting motor is disposed between the mounting plates and connected to the reels through a timing belt.