Circumferential weld operation trolley for cantilever construction of ultra-wide split type steel box girder

Abstract

The invention belongs to the technical field of steel structure bridge construction, and particularly discloses an ultra-wide split type steel box girder cantilever construction circumferential weld operation trolley which comprises a lifting system, a fixing frame, a split type steel box girder and a circumferential weld operation trolley body arranged on the side edge of the split type steel box girder. The circumferential weld operation trolley body comprises a walking system, an upper transverse supporting truss, a vertical connecting truss, a lower transverse support truss and an operation platform. The walking system comprises a walking chassis, an inner side connecting frame, an outer side connecting frame, a connecting cross rod and a balance weight. The upper transverse supporting truss is installed above the outer side connecting frame, and the vertical connecting truss is connected with the upper transverse supporting truss and the lower supporting truss. The working platform comprises standard knots, end reinforcing knots, middle reinforcing knots, diagonal draw bars, a lifting frame and a stabilizing frame. The lifting system comprises a winch, a steel wire rope and a shackle and can conduct lifting operation of the operation platform.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure bridge construction, in particular to an ultra-wide split steel box girder cantilever construction ring weld operation trolley. Background Art

[0002] The double-tower, double-cable-plane, semi-floating cable-stayed bridge adopts the cantilever method for installing the main span steel box girder between the two main towers. Due to the long span and the absence of brackets, a circumferential weld working platform needs to be set up at the circumferential weld position. The cantilever construction of traditional cable-stayed bridges often uses a permanent maintenance trolley with tracks installed at the bottom of the steel box girder for construction. Since the maintenance trolley is designed as a trackless maintenance trolley, it is installed after the entire bridge is connected, making it unusable during the cantilever construction stage. Since there is no track at the bottom of the beam and the steel box girder deck is wide, it is difficult to hang a temporary working platform at the bottom of the beam. Therefore, a circumferential weld working platform on the upper bridge deck is needed to solve the construction needs of circumferential weld grinding, ceramic liner pasting, local weld welding, repair, paint grinding and painting of ultra-wide steel box girders. Summary of the invention

[0003] The purpose of the present invention is to provide an ultra-wide split steel box girder cantilever construction circumferential weld seam operation trolley to solve the construction operation requirements of ultra-wide steel box girder circumferential seam grinding, ceramic liner pasting, local weld seam welding, repairing, paint grinding and coating, etc.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-wide split steel box girder cantilever construction girder weld operation trolley, comprising a lifting system, a fixed frame, a split steel box girder and a girder weld operation trolley body arranged on the side of the split steel box girder, the girder weld operation trolley body comprising a walking system, an upper transverse support truss, a vertical connection truss, a lower transverse support truss and a working platform; the walking system is placed at a distance of not less than 100 mm from the edge of the bridge deck;

[0005] The walking system includes a walking chassis, an inner connecting frame, an outer connecting frame, a connecting cross bar and a counterweight, wherein the inner connecting frame and the outer connecting frame are respectively installed on the walking chassis, and the inner connecting frame and the outer connecting frame are fixed by a connecting cross bar, and the counterweight is arranged above the inner connecting frame;

[0006] The upper transverse support truss is installed above the outer connecting frame, and the vertical connecting truss is connected to the upper transverse support truss and the lower support truss respectively;

[0007] The working platform comprises a standard section, an end reinforcement section, a middle reinforcement section, a diagonal tie rod, a lifting frame and a stabilizing frame; the end reinforcement section is arranged at both ends of the middle reinforcement section, the end reinforcement section and the middle reinforcement section are both composed of a plurality of standard sections, the diagonal tie rod is arranged below the working platform, and the lifting frame is arranged on the end reinforcement section;

[0008] The lifting system includes a winch, a wire rope and a shackle. The winch is connected to the lifting frame through the wire rope and the shackle to perform lifting operations on the working platform.

[0009] As a preferred embodiment of the present invention, eight connecting cross bars are provided. In the direction of walking, the connecting cross bars close to the inclined cables are removed one by one, and installed in time after passing the inclined cables. Two connecting cross bars can be removed to ensure that there are six connecting cross bars connected, thereby achieving safe crossing of the inclined cables.

[0010] As a preferred embodiment of the present invention, the end reinforcement section and the middle reinforcement section are connected to the diagonal tie rod by bolts to adjust the length of the diagonal tie rod.

[0011] As a preferred embodiment of the present invention, the lifting frame is connected to the working platform by bolts to facilitate its disassembly and assembly at a later stage.

[0012] As a preferred embodiment of the present invention, a fixing frame is fixed on the lower transverse supporting truss.

[0013] As a preferred embodiment of the present invention, the standard section is composed of three truss pieces, the diagonal brace is composed of a round rod and a turnbuckle, and the turnbuckle can be adjusted to adjust the length.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention ensures that the operational requirements of construction such as circumferential seam grinding, ceramic liner pasting, local weld welding, repair, paint grinding and coating are met. The circumferential weld operation trolley can move by itself, is easy to use, and can pass the inclined cable, shortening the on-site installation period. It is a key measure to ensure the welding and painting quality of steel box girders and construction safety. Compared with the prior art, it solves the problem of hanging a temporary working platform without a track at the bottom of the beam and the problem of the walking mechanism passing the inclined cable. It has the advantages of high efficiency, safety, simple structure, easy installation and operation, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the present invention;

[0018] Figure 3 This is a schematic diagram of assembling the working platform of the present invention on a beam transport ship.

[0020] In the figure: 1. bridge crane; 2. split steel box girder; 3. inclined cable; 4. main body of girth weld operation trolley; 41. walking system; 411. walking chassis; 412. inner connecting frame; 413. outer connecting frame; 414. connecting cross bar; 415. counterweight; 42. upper transverse support truss; 43. vertical connecting truss; 44. lower transverse support truss; 45. working platform; 451. standard section; 452. end reinforcement section; 453. middle reinforcement section; 454. inclined rod; 455. lifting frame; 456. stabilizing frame; 5. lifting system; 6. fixed frame; 7. passage; 8. beam transport ship. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1 The present invention provides a technical solution: a cantilever construction girth weld operation trolley for an ultra-wide split steel box girder 2, comprising a lifting system 5, a fixing frame 6, a split steel box girder 2 and a girth weld operation trolley body 4 arranged on the side of the split steel box girder 2, the girth weld operation trolley body 4 comprising a walking system 41, an upper transverse support truss 42, a vertical connection truss 43, a lower transverse support truss and a working platform 45; the walking system 41 is placed at a distance of not less than 100 mm from the edge of the bridge deck.

[0025] Furthermore, the walking system 41 includes a walking chassis 411, an inner connecting frame 412, an outer connecting frame 413, a connecting cross bar 414 and a counterweight 415. The inner connecting frame 412 and the outer connecting frame 413 are respectively installed on the walking chassis 411, and the inner connecting frame 412 and the outer connecting frame 413 are fixed by a connecting cross bar 414, which is arranged above the inner connecting frame 412.

[0026] Furthermore, the upper transverse supporting truss 42 is installed above the outer connecting frame 413, and the vertical connecting truss 43 is connected to the upper transverse supporting truss 42 and the lower supporting truss respectively.

[0027] Furthermore, the working platform 45 includes a standard section 451, an end reinforcement section 452, a middle reinforcement section 453, a diagonal tie rod 454, a lifting frame 455 and a stabilizing frame 456; the end reinforcement section 452 is arranged at both ends of the middle reinforcement section 453, and the end reinforcement section 452 and the middle reinforcement section 453 are both composed of multiple standard sections 451, the diagonal tie rod 454 is arranged below the working platform 45, and the lifting frame 455 is arranged on the end reinforcement section 452.

[0028] Furthermore, the lifting system 5 includes a winch, a wire rope and a shackle. The winch is connected to the lifting frame 455 through the wire rope and the shackle, and can perform lifting operations on the working platform 45.

[0029] Furthermore, eight connecting cross bars 414 are provided. In the direction of walking, the connecting cross bars 414 close to the inclined cable 3 are removed in turn, and installed in time after passing the inclined cable 3. Two connecting cross bars 414 can be removed to ensure that there are six connecting cross bars 414 connected, thereby achieving safe passing of the inclined cable 3.

[0030] Furthermore, the end reinforcement section 452 and the middle reinforcement section 453 are connected to the inclined rod 454 by bolts, and the length of the inclined rod 454 is adjusted to form a pre-arch to prevent the working platform 45 from deflecting.

[0031] Furthermore, the lifting frame 455 is connected to the working platform 45 by bolts to facilitate its disassembly and assembly at a later time.

[0032] Furthermore, a fixing frame 6 is fixed on the lower transverse support truss 44. When the working platform 45 is lifted to the working position, the fixing frame 6 is bolted to the working platform 45. The stabilizing frame 456 is welded and rigidly connected to the bottom plate of the steel box beam after the working platform 45 is lifted to the working position. The channel 7 is installed after the working platform 45 is lifted to the working position. Please refer to Figure 2 .

[0033] Furthermore, the standard section 451 is composed of three truss pieces, and the diagonal brace 454 is composed of a round rod and a turnbuckle, and the turnbuckle can be adjusted to adjust the length.

[0034] The standard section 451, the end reinforcement section 452, the middle reinforcement section 453, the inclined tie rod 454, the lifting frame 455, and the stabilizing frame 456 of the working platform 45 of the present invention are respectively hoisted on the top of the steel box beam of the beam transport ship 8 by using lifting equipment for assembly. Figure 3 ; The walking system 41, the upper lateral support truss 42; the vertical connection truss 43, and the lower lateral support truss 44 are assembled using lifting equipment; the lifting system 5 lowers the wire rope to connect with the working platform 45, and after lifting to the working position, the fixed frame 6 is bolted to the working platform 45, and it is ready for use.

[0035] Use includes the following steps:

[0036] S1, bridge crane 1 lifts steel box girder 2 and adjusts the line shape to meet the requirements, and then performs girth welding to match the code plate;

[0037] S2. After the girth weld web and top plate are welded, the girth weld operation trolley body 4 moves forward to the girth weld bottom plate welding position;

[0038] S3. After the girth welding and painting operations are completed, the girth welding trolley body 4 moves forward to the front end through the inclined cable 3.

[0039] It is worth noting that the entire device is controlled by a main control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-wide split steel box girder cantilever construction ring weld operation trolley, characterized in that: It comprises a lifting system (5), a fixing frame (6), a split steel box girder (2), and a girth welding operation trolley body (4) arranged on the side of the split steel box girder (2), wherein the girth welding operation trolley body (4) comprises a walking system (41), an upper transverse supporting truss (42), a vertical connecting truss (43), a lower transverse supporting truss, and an operation platform (45); The walking system (41) comprises a walking chassis (411), an inner connecting frame (412), an outer connecting frame (413), a connecting cross bar (414) and a counterweight (415); the inner connecting frame (412) and the outer connecting frame (413) are respectively mounted on the walking chassis (411); the inner connecting frame (412) and the outer connecting frame (413) are fixed via the connecting cross bar (414); and the counterweight (415) is arranged above the inner connecting frame (412); The upper transverse support truss (42) is installed above the outer connecting frame (413), and the vertical connecting truss (43) is connected to the upper transverse support truss (42) and the lower support truss respectively; The working platform (45) comprises a standard section (451), an end reinforcement section (452), a middle reinforcement section (453), a diagonal tie rod (454), a lifting frame (455) and a stabilizing frame (456); the end reinforcement section (452) is arranged at both ends of the middle reinforcement section (453), the end reinforcement section (452) and the middle reinforcement section (453) are both composed of a plurality of standard sections (451), the diagonal tie rod (454) is arranged below the working platform (45), and the lifting frame (455) is arranged on the end reinforcement section (452); The lifting system (5) comprises a winch, a steel wire rope and a shackle, and the winch is connected to the lifting frame (455) via the steel wire rope and the shackle.

2. According to claim 1, the ultra-wide split steel box girder cantilever construction ring weld operation trolley is characterized by: The connecting cross bars (414) are provided in eight numbers.

3. According to claim 1, the ultra-wide split steel box girder cantilever construction ring weld operation trolley is characterized by: The end reinforcement section (452) and the middle reinforcement section (453) are connected to the inclined tie rod (454) via bolts.

4. According to claim 1, the ultra-wide split steel box girder cantilever construction ring weld operation trolley is characterized by: The lifting frame (455) is connected to the working platform (45) via bolts.

5. According to claim 1, the ultra-wide split steel box girder cantilever construction ring weld operation vehicle is characterized by: A fixing frame (6) is fixed on the lower transverse supporting truss (44).

6. The ultra-wide split steel box girder cantilever construction ring weld operation trolley according to claim 1, characterized in that: The standard section (451) is composed of three truss pieces, and the diagonal stay (454) is composed of a round bar and a turnbuckle.

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