Cable-stayed cable deployment trolley and deployment system

Abstract

The utility model relates to the field of bridge construction, concretely relates to a cable -stay cable unwinding trolley and cable unwinding system, wherein the trolley includes a support part and a walking mechanism, the support part top is equipped with the clamping groove for placing the cable, the walking mechanism includes at least one fixed axle, the fixed axle is connected in the support part bottom, and the fixed axle both ends are equipped with universal wheel respectively. In the cable unwinding process, the cable unwinding trolley moves with the cable synchronously, under the limiting action of the clamping groove, the cable is not easy to separate from the support part of the trolley, and the trolley bottom is designed with universal wheel, in the process that the cable releases stress, the trolley can adaptively turn with the swing of the cable, and the probability that the cable unwinding trolley overturns is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and in particular to a cable-stayed bridge cable-laying trolley and cable-laying system. Background Technology

[0002] With the rapid development of transportation infrastructure in my country, cable-stayed bridges have been widely used due to their structural advantages. As a crucial load-bearing component of cable-stayed bridges, stay cables are typically made of parallel steel wires and are manufactured in the factory before being transported to the construction site for installation. For ease of transport, stay cables are usually coiled into coils; however, due to their inherent rigidity, stress is generated after coiling. Therefore, it is necessary to unwind the cables during installation to release this stress.

[0003] Traditional flat-plate cable-laying trolleys have the following problems during the cable-laying process: 1) Insufficient fit with the stay cable; during cable extension, the cable is prone to detaching from the trolley. 2) Poor stress relief effect, prone to rollover, posing a safety hazard.

[0004] Therefore, there is an urgent need for a new type of cable-laying trolley to solve the above problems and improve construction efficiency and safety. Utility Model Content

[0005] The purpose of this utility model is to overcome the problems of insufficient fit between the cable-laying trolley and the cable and poor stress release effect, and to avoid the cable lock from detaching from the trolley or the trolley overturning during the cable-laying process, so as to provide a cable-laying trolley and cable-laying system.

[0006] In a first aspect, the present invention provides a cable-stayed bridge cable-laying trolley, comprising a support part and a traveling mechanism. The top of the support part is provided with a slot for placing the cable. The traveling mechanism includes at least one fixed shaft, which is connected to the bottom of the support part. Both ends of the fixed shaft are respectively provided with casters.

[0007] This utility model discloses a cable-stayed bridge extension trolley. In use, the cable to be extended is placed into the slot at the top of the support. During the extension process, the extension trolley moves with the cable. Under the limiting effect of the slot, the cable is not easy to detach from the support of the trolley. In addition, the bottom of the trolley is designed with casters. During the process of releasing stress on the cable, the trolley can adaptively turn with the swing of the cable, reducing the probability of the extension trolley tipping over.

[0008] Preferably, the support part is a U-shaped steel plate integrally stamped, and the inner arc radius is adapted to the diameter of the cable.

[0009] The U-shaped steel plate, formed by integral stamping, has good structural strength, is lightweight and easy to use. The U-shaped design provides better wrapping, and the inner arc radius matches the diameter of the cable to improve fit and reduce the risk of cable detachment.

[0010] Preferably, the height difference between the top surface of the support and the bottom of the slot is H, and the diameter of the cable is D, where H ≥ 2 / 3D.

[0011] Ensure that the slot covers 2 / 3 of the cable's height so that the cable is less likely to detach from the support during cable deployment.

[0012] Preferably, the outer wall of the support portion is provided with a support rod, and the bottom of the support rod is connected to the fixed shaft.

[0013] Because the support section uses U-shaped steel plates, it may be prone to deformation during use. By installing support rods on the outside of the support section, the structural strength of the support section is improved, and deformation caused by uneven force during cable laying is prevented.

[0014] Preferably, the top of the support is provided with geotextile, which is laid on the inner wall of the slot.

[0015] Geotextiles can reduce friction between the stay cables and the metal slots, prevent damage to the PE sleeve on the cable surface, and increase friction to reduce relative sliding.

[0016] Preferably, a plurality of threaded holes are provided on both sides of the slot, and each threaded hole is equipped with a screw, which passes through the edge of the geotextile and is connected to the threaded hole.

[0017] Screws are used to secure the geotextile to prevent it from shifting or falling off during cable laying, ensuring long-term reliability. The screws are located on both sides of the slot (top surface of the support) to avoid contact with the cable and causing wear on the cable surface. Moreover, the screws can be removed and replaced if the geotextile is damaged.

[0018] Preferably, a washer is fitted onto the screw, and the nut portion of the screw presses the washer against the top surface of the support portion.

[0019] The gasket disperses the pressure of the screws, preventing partial tearing of the geotextile and enhancing the fixation strength of the geotextile.

[0020] Preferably, the fixed shaft has a bent portion, and the bent portion is adapted to the shape of the bottom surface of the support portion.

[0021] The bending section increases the welding area between the fixed shaft and the support, making the connection between the fixed shaft and the support more stable.

[0022] Preferably, there are two fixed shafts, which are arranged along the length of the slot.

[0023] The dual-axis design improves the stability of the cable-laying trolley and avoids tilting or jamming caused by uneven force on a single axis.

[0024] In a second aspect, the present invention also provides a cable-laying system, including a turntable, a winch, and several cable-laying trolleys as described above. The turntable is used to install the cable coil, and the winch is used to pull the anchor end of the cable to lay it out from the turntable. The several cable-laying trolleys are arranged at intervals along the cable laying direction.

[0025] This utility model discloses a cable-laying system. In use, the cable coil is installed on a turntable, and a winch is connected to the cable anchor head. When the winch is started, the cable is slowly pulled, and the turntable rotates synchronously to release the cable. As the cable is pulled out, the cable-laying trolley is positioned in sequence to prevent it from touching the ground or bending excessively. During the stress release process of the cable, the cable-laying trolley supports the cable through a slot. At the same time, the cable-laying trolley has a combination of a fixed shaft and universal wheels at the bottom, which allows the cable-laying trolley to move flexibly along the cable direction, reducing the probability of the cable-laying trolley detaching from the cable and overturning.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a cable-stayed bridge cable-laying trolley, which directly supports the cable-stayed bridge through a slot at the top of the support part, ensuring that the cable-stayed bridge remains stable during the cable-laying process and is not easily detached from the cable-laying trolley; 2. This utility model provides a cable-stayed bridge cable-laying trolley, which, through a fixed shaft and universal wheel structure, enables the trolley to move flexibly along the cable-stayed bridge, avoiding the problem of the cable-laying trolley tipping over due to inflexible steering. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the cable-stayed bridge cable-laying trolley in use according to this utility model; Figure 2 yes Figure 1 Enlarged view of area A in the middle; Figure 3 This is a side view of the cable-stayed bridge cable-laying trolley in use according to this utility model; Marked in the image: 1-Support part, 11-Slot, 12-Threaded hole, 2-Fixed shaft, 21-Bending part, 3-Wheel caster, 4-Support rod, 5-Geotextile, 6-Screw, 7-Washer, 8-Cable. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0029] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0031] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0032] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0033] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0034] Example 1 like Figure 1 , Figure 2 and Figure 3 As shown, a cable-stayed bridge cable-laying trolley includes a support section and a traveling mechanism. The top of the support section is provided with a slot for placing the cable. The traveling mechanism includes at least one fixed shaft. To ensure the stability of the cable-laying trolley and simplify its structure, the best option is to connect two fixed shafts to the bottom of the support section. The two fixed shafts are arranged along the length of the slot. Each fixed shaft is provided with a universal wheel at both ends, and the universal wheel can rotate 360°.

[0035] When in use, the cable is placed into the slot at the top of the support. During the cable deployment process, the cable deployment trolley moves with the cable. Under the limiting effect of the slot, the cable is not easy to detach from the support of the trolley. In addition, the bottom of the trolley is designed with casters. During the process of releasing stress on the cable, the trolley can adapt to the swing of the cable and turn accordingly, reducing the probability of the cable deployment trolley tipping over.

[0036] In one or more embodiments, the support part can be made of U-shaped steel plate, which is integrally stamped and formed. Its inner arc radius is adapted to the diameter of the stay cable, so that the stay cable can be installed on the inner arc surface of the U-shaped steel plate, and the U-shaped opening forms the slot.

[0037] In an optional embodiment, the height difference between the top surface of the support and the bottom of the slot is H, and the diameter of the cable is D, where H ≥ 2 / 3D, ensuring that the slot can cover 2 / 3 of the height of the cable, so that the cable is not easily detached from the support during the cable extension process.

[0038] In an optional embodiment, each fixed shaft is provided with two support rods, which are located between the two casters and the support part. The upper part of the support rod is connected to the side of the support part and is inclined to support the outer wall of the support part, so as to prevent the support part using U-shaped steel plate from deforming due to uneven force during cable laying.

[0039] In an optional embodiment, since the support part is made of U-shaped steel plate with an arc-shaped bottom, a bending part can be provided on the fixed shaft accordingly. The bending part is adapted to the shape of the bottom surface of the support part. The bending part can increase the welding area between the fixed shaft and the support part, making the connection between the fixed shaft and the support part more stable.

[0040] In one or more embodiments, geotextile can also be provided on the support. The geotextile is laid on the inner wall of the slot, which can reduce the friction between the cable and the metal slot, avoid damage to the PE sleeve on the cable surface, and increase the friction force to reduce relative sliding.

[0041] In an optional embodiment, several threaded holes are provided on both sides of the slot, and each threaded hole is equipped with a screw. The screw passes through the edge of the geotextile and is connected to the threaded hole. The geotextile is fixed by the screw to prevent it from shifting or falling off during cable laying, ensuring long-term reliability. The screw is located on both sides of the slot (top surface of the support) to avoid contact with the cable and causing wear on the cable surface. Moreover, the screw can be removed and replaced after the geotextile is damaged.

[0042] In an optional embodiment, a washer is fitted onto the screw, and the nut portion of the screw presses the washer against the top surface of the support portion. The washer can distribute the screw pressure, prevent the geotextile portion from tearing, and enhance the fixation firmness of the geotextile.

[0043] Example 2 like Figure 1 and Figure 3 As shown, in this embodiment, a cable-laying system is provided, including a turntable, a winch, and several cable-laying trolleys as described above. The turntable is used to install the cable coil, and the winch is used to pull the anchor end of the cable, so that the cable is laid out from the turntable. The several cable-laying trolleys are arranged at intervals along the cable laying direction.

[0044] In use, the cable coil is installed on the turntable, the winch is connected to the cable anchor head, the winch is started and the cable is slowly pulled, the turntable rotates synchronously to release the cable, as the cable is pulled out, the cable spreading trolley is positioned in sequence to prevent it from touching the ground or bending excessively. During the cable stress release process, the cable spreading trolley supports the cable through the slot, and at the same time, the cable spreading trolley can move flexibly along the cable direction through the combination structure of fixed shaft and universal wheels at the bottom of the cable spreading trolley, reducing the probability of the cable spreading trolley detaching from the cable and overturning.

[0045] Example 3 like Figure 1 and Figure 3 As shown, in this embodiment, a cable extension method is provided, including the following steps: 1. Process the cable-laying trolley according to Example 1.

[0046] 2. Transport the finished parallel steel wire cable from the factory to the turntable, and the tower crane will hoist the cable anchor head on one side of the tower end to the tower column.

[0047] 3. The winch at the top of the tower pulls the anchor head at the end of the cable-stayed tower to the steel anchor beam for fixation via the cable guide pipe.

[0048] 4. The winch at the beam end pulls the side anchor head at the beam end.

[0049] 5. The winch pulls the anchor head 5m to install a cable-laying trolley until the cable is fully extended.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cable-stayed bridge cable-laying trolley, characterized in that, It includes a support part and a walking mechanism. The top of the support part is provided with a slot for placing the cable. The walking mechanism includes at least one fixed shaft, which is connected to the bottom of the support part. Both ends of the fixed shaft are provided with casters.

2. The cable-stayed bridge cable-laying trolley according to claim 1, characterized in that, The support part is a U-shaped steel plate formed by integral stamping, and the inner arc radius is adapted to the diameter of the cable.

3. The cable-stayed bridge cable-laying trolley according to claim 2, characterized in that, The height difference between the top surface of the support and the bottom of the slot is H, and the diameter of the cable is D, where H ≥ 2 / 3D.

4. The cable-stayed bridge cable-laying trolley according to claim 2, characterized in that, The outer wall of the support part is provided with a support rod, and the bottom of the support rod is connected to the fixed shaft.

5. The cable-stayed bridge cable-laying trolley according to claim 1, characterized in that, The top of the support is provided with geotextile, which is laid on the inner wall of the slot.

6. The cable-stayed bridge cable-laying trolley according to claim 5, characterized in that, The slot has several threaded holes on both sides, and each threaded hole is equipped with a screw. The screw passes through the edge of the geotextile and is connected to the threaded hole.

7. A cable-stayed bridge cable-laying trolley according to claim 6, characterized in that, A washer is fitted onto the screw, and the nut portion of the screw presses the washer tightly against the top surface of the support.

8. The cable-stayed bridge cable-laying trolley according to claim 1, characterized in that, The fixed shaft has a bent portion, which is adapted to the shape of the bottom surface of the support portion.

9. A cable-stayed bridge cable-laying trolley according to any one of claims 1-8, characterized in that, The number of fixed shafts is two, and the two fixed shafts are arranged along the length direction of the slot.

10. A cable-laying system, characterized in that, It includes a turntable, a winch, and several cable-laying trolleys as described in any one of claims 1-9. The turntable is used to install the cable coil, and the winch is used to pull the anchor end of the cable to unfold the cable from the turntable. The several cable-laying trolleys are arranged at intervals along the cable unfolding direction.

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