Trolley walking mechanism capable of passing through stay cable circumferential weld operation

Abstract

The utility model discloses a trolley travelling mechanism capable of passing through a stay cable circumferential weld for operation. The trolley travelling mechanism is characterized by comprising an outer side travelling chassis, an inner side travelling chassis, an outer side connecting frame, an inner side connecting frame, a connecting cross rod and a balancing weight, the outer side walking chassis and the outer side connecting frame are connected through a flange, and the inner side walking chassis and the inner side connecting frame are connected through a flange; the connecting cross rod is connected with the outer side connecting frame and the inner side connecting frame through high-strength bolts; a balancing weight is arranged on the upper portion of the inner side connecting frame, and the weight of the balancing weight meets the anti-overturning requirement. The outer side walking chassis has a steering function; and the walking mechanism passes through the stay cable in a mode of alternately dismounting the connecting cross rods. Compared with the prior art, the suspension connecting device has the advantages of meeting the requirements of suspension connecting and bearing of a circumferential weld operation trolley, achieving the function requirements of self-walking and stay cable passing, being simple in structure, convenient to manufacture and install, convenient to operate, safe, efficient and good in application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of working platforms for steel structure bridge construction, in particular to a trolley traveling mechanism capable of operating through the weld seams of inclined cable rings. Background Art

[0002] The steel box girder of the main span between the two main towers of a cable-stayed bridge is installed using the cantilever method. Due to the long span and the lack of support, a girth weld work platform is required at the girth joint. The permanent inspection trolley is designed to be trackless and installed after the bridge is closed. Therefore, cantilever construction requires a girth weld work platform mounted on the bridge deck. While traditional mobile bridge inspection vehicles can bypass the stay cables to provide a work platform, they are costly, cumbersome, and require specialized personnel, resulting in low girth weld construction efficiency. The limited space outside the stay cables precludes the installation of a traveling mechanism, so a traveling mechanism must be installed across them. The cantilever construction process for a cable-stayed bridge involves lifting the steel box girder, precisely positioning the beam segments, moving the girth weld work platform to the construction station, grinding and applying ceramic liners, welding and bolting the girth welds, repairing local welds, grinding and painting the girth weld area, tensioning the stay cables, and advancing the girth weld work platform over the stay cables. Therefore, the traveling mechanism must meet the requirements for working over the stay cables.

[0003] While existing mobile bridge inspection vehicles can bypass stay cables to provide a work platform, they are expensive, cumbersome, and require specialized personnel, resulting in low efficiency in circumferential weld seam construction. The travel mechanism of suspended work trolleys is unable to pass through stay cables. Therefore, a novel travel mechanism for a work trolley capable of passing through stay cables and circumferential weld seams is needed to ensure the suspension connection and load-bearing requirements of the circumferential weld seam work platform, while also enabling self-propelled movement and the ability to pass through stay cables. This is crucial for circumferential weld seam welding of the main span steel box girder between the two main towers of a cable-stayed bridge. Utility Model Content

[0004] The purpose of the utility model is to provide a trolley walking mechanism that can pass through the oblique cable ring weld operation in response to the deficiencies in the existing technology. The trolley walking mechanism adopts inner and outer walking chassis, and inner and outer connecting frame structures. The ring weld operation trolley only needs to alternately install and remove the connecting cross bars of the walking mechanism to achieve the functional requirements of self-walking and passing the oblique cable, and meet the suspension connection and load-bearing requirements of the ring weld operation trolley. The utility model has a simple structure, convenient manufacture and installation, easy operation, high work efficiency, safety and efficiency, greatly shortens the on-site ring weld construction period, and has good application prospects.

[0005] The specific technical solution for achieving the purpose of the utility model is: a trolley walking mechanism that can operate through the inclined cable ring weld, which is characterized in that the trolley walking mechanism consists of an outer walking chassis, an inner walking chassis, an outer connecting frame, an inner connecting frame, a connecting cross bar, and a counterweight block. The inner walking chassis and the outer walking chassis are tire-type and driven by a motor, and the outer walking chassis has a steering function; when the bridge deck of the outer walking chassis is installed and positioned, a certain safety distance is left between the outer edge of the tire and the edge of the steel box girder bridge deck; the outer connecting frame is a truss structure welded by a first horizontal rod, a first column, a first diagonal brace and a first connecting rod; the inner connecting frame is a truss structure welded by a second horizontal rod, a third horizontal rod, a second column, a third column, a second diagonal brace, an internal support, a column connecting rod and a second connecting rod; the end of the first horizontal rod and the column foot of the first column are welded with a flange plate flange-connected to the outer walking chassis; the second column, the third column The column foot is welded with a flange plate and is connected to the inner walking chassis flange; the end of the connecting cross bar is welded with a flange plate and is bolted to the first column and the second column respectively; the bolt connection of the first column and the second column is provided with a through hole; the length of the connecting cross bar is determined according to the horizontal distance in the transverse bridge direction of the maximum projection of the cable-stayed bridge deck, and the longitudinal arrangement spacing of the connecting cross bar is determined by the vertical plane lofting of the minimum slope of the cable-stayed cable; the connecting cross bar is arranged in two layers, upper and lower, with a total of eight, and six are guaranteed to be connected at the same time when passing the cable-stayed cable; the horizontal bars and vertical bars of the outer connecting frame and the inner connecting frame are longitudinally arranged in accordance with the longitudinal arrangement of the connecting cross bar; the counterweight block is placed on the upper part of the inner connecting frame, and there are two counterweight blocks. The weight meets the anti-overturning requirements to ensure the stability of the annular seam operation trolley; the outer connecting frame is bolted to the suspension structure; the main structure of the outer walking chassis, inner walking chassis, outer connecting frame, inner connecting frame and connecting cross bar is a rectangular square tube.

[0006] Compared with the prior art, the utility model has the advantages of high efficiency, safety, simple structure, easy installation and operation, etc. The girth welding operation trolley only needs to alternately install or remove the connecting cross bars of the walking mechanism to realize the functional requirements of self-walking and passing the inclined cable. It has a simple structure, convenient manufacture and installation, and easy operation. It greatly meets the requirements of the suspension connection and the load-bearing capacity of the girth welding operation trolley, shortens the on-site girth welding construction period, is safe and efficient, and better solves the problem of the walking mechanism of the girth welding operation trolley passing the inclined cable, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the structure of the utility model;

[0008] Figure 2 This is a schematic diagram of the structure of the utility model;

[0009] Figure 3 for Figure 1 AA cross-sectional diagram;

[0010] Figure 4 This is an application diagram of Example 1. DETAILED DESCRIPTION

[0011] See Figures 1 to 3 The walking mechanism 1 of the present invention is composed of an outer walking chassis 11, an inner walking chassis 12, an outer connecting frame 13, an inner connecting frame 14, a connecting cross bar 15 and a counterweight 16. The inner walking chassis 12 and the outer walking chassis 11 are tire-type and driven by a motor; the outer walking chassis 11 has a steering function; when the outer walking chassis 11 is installed and positioned on the bridge deck, a certain safety distance is left between the outer edge of the tire and the edge of the steel box girder 4; the outer connecting frame 13 is composed of a first horizontal rod 131, a first column 132, a first diagonal brace 133 and the first connecting rod 134, and are welded to each other; the inner connecting frame 14 is composed of a second horizontal rod 141, a third horizontal rod 142, a second column 143, a third column 144, a second diagonal brace 145, an internal support 146, a column connecting rod 147 and a second connecting rod 148, and are welded to each other; the end of the first horizontal rod 131 and the column foot of the first column 132 are welded with a flange plate and flange-connected to the outer walking chassis 11; the column feet of the second column 143 and the third column 144 are welded with a flange plate and flange-connected to the inner walking chassis The flange connection of the plate 12; the end of the connecting crossbar 15 is welded with a flange plate and is bolted to the first column 132 and the second column 143 respectively; the bolt connection of the first column 132 and the second column 143 is drilled with a through hole; the length of the connecting crossbar 15 is determined according to the horizontal distance of the transverse bridge of the maximum projection of the bridge deck of the inclined cable 3, and the longitudinal arrangement spacing of the connecting crossbar 15 is determined by the vertical plane setting out of the minimum slope of the inclined cable 3; there are eight connecting crossbars 15, which are arranged in two layers. When the walking mechanism 1 passes the inclined cable 3, it should be ensured that It is connected simultaneously by six connecting cross bars 15; the horizontal bars and vertical bars of the outer connecting frame 13 and the inner connecting frame 14 are arranged longitudinally in accordance with the longitudinal arrangement of the connecting cross bars 15; the counterweight block 16 is placed on the upper part of the inner connecting frame 14, and there are two counterweight blocks 16, whose weight meets the anti-overturning requirements to ensure the stability of the girth weld operation trolley 2; the outer connecting frame 13 is connected to the suspension structure 21 through a flange; the main structure of the outer walking chassis 11, the inner walking chassis 12, the outer connecting frame 13, the inner connecting frame 14 and the connecting cross bar 15 is a rectangular square tube.

[0012] The use of the present invention is further described in detail below through specific implementation. Example

[0013] See Figure 4The traveling mechanism 1 is connected to the girth welding operation trolley 2 provided on the steel box girder 4 by using a suspension structure 21. The specific installation of the traveling mechanism 1 and the girth welding operation trolley 2 includes the following steps:

[0014] S1, outer traveling chassis 11, inner traveling chassis 12, outer connecting frame 13, inner connecting frame 14, connecting cross bar 15, and counterweight 16 are hoisted onto the bridge deck of steel box girder 4 respectively;

[0015] S2, the outer connecting frame 13 is flange-connected to the outer walking chassis 11;

[0016] S3, the inner connecting frame 14 is flange-connected to the inner walking chassis 12;

[0017] S4. Adjust the positions of the outer connecting frame 13 and the inner connecting frame 14, and connect the connecting cross bar to the outer connecting frame 13 and the inner connecting frame 14 by flange connection respectively;

[0018] S5, hoisting the counterweight 16 to the upper part of the inner connecting frame 14;

[0019] S6. After debugging, the traveling mechanism 1 moves as a whole, so that the outer edge of the tire of the outer traveling chassis 11 and the edge of the bridge deck of the steel box girder 4 leave a safety distance of 100 mm;

[0020] S7. The walking mechanism 1 is driven by the motors on the inner walking chassis 12 and the outer walking chassis 11. When the walking mechanism 1 moves to the inclined cable 3, the outer connecting frame 13 and the inner connecting frame 14 are connected simultaneously by at least six connecting cross bars 15. By alternately removing the connecting cross bars 15, it is ensured that the walking mechanism 1 passes the inclined cable safely.

[0021] The above is only a further explanation of the utility model and is not intended to limit this patent. Any equivalent implementation of the utility model should be included in the scope of the claims of this patent.

Claims

1. A trolley travel mechanism capable of operating over the weld seam of inclined cable rings, characterized in that: The walking mechanism (1) is composed of an outer walking chassis (11), an inner walking chassis (12), an outer connecting frame (13), an inner connecting frame (14), a connecting cross bar (15) and a counterweight (16), wherein the outer connecting frame (13) is a truss structure formed by welding a first horizontal bar (131), a first column (132), a first diagonal brace (133) and a first connecting rod (134); and the inner connecting frame (14) is a truss structure formed by welding a second horizontal bar (141), a third horizontal bar (142), a second column (143), a third column (144), a second diagonal brace (145), an inner support (146), an inter-column connecting rod (147) and a second connecting rod (148). The outer walking chassis (11) is connected by a flange plate and symmetrically arranged at both ends under the outer connecting frame (13), the flange plate is welded to the first horizontal rod (131) and the first column (132), and the flange plate is bolted to the outer walking chassis (11); the inner walking chassis (12) is connected by a flange plate and arranged under the inner connecting frame (14), the flange plate is welded to the second column (143) and the third column (144), and the flange plate is bolted to the inner connecting frame (14); the counterweight (16) is arranged on the inner connecting frame (14); the outer connecting frame (13) is connected to the inner connecting frame (14) by a plurality of connecting cross bars (15) using high-strength bolts.

2. The trolley travel mechanism capable of operating through the inclined cable ring weld according to claim 1 is characterized in that: The end of the connecting crossbar (15) is provided with a welded flange plate which is bolted to the first column (132) and the second column (143); a through hole is provided at the bolt connection between the first column (132) and the second column (143).

3. The trolley travel mechanism capable of operating through the inclined cable ring weld according to claim 1 is characterized in that: The longitudinal arrangement of the horizontal bars and vertical bars of the outer connecting frame (13) and the inner connecting frame (14) is consistent with the longitudinal arrangement of the connecting cross bar (15).

4. The trolley travel mechanism capable of operating through the inclined cable ring weld according to claim 1 is characterized in that: The main structures of the outer walking chassis (11), the inner walking chassis (12), the outer connecting frame (13), the inner connecting frame (14) and the connecting crossbar (15) are rectangular square tubes.

5. The trolley travel mechanism capable of operating through the inclined cable ring weld according to claim 1 is characterized in that: The outer walking chassis (11) and the inner walking chassis (12) are driven by tire-type motors, and the outer walking chassis (11) has a steering function.

6. The trolley travel mechanism capable of operating through the inclined cable ring weld according to claim 1 is characterized in that: The length of the connecting crossbar (15) is determined according to the horizontal distance in the transverse direction of the maximum projection of the cable-stayed bridge deck, and the longitudinal arrangement spacing of the connecting crossbar (15) is determined by the vertical layout of the minimum slope of the cable-stayed bridge.

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