Synchronous lifting control device for steel box girder hoisting

Abstract

The utility model discloses a steel box girder hoisting synchronous lifting control device, which relates to the field of bridge construction equipment, and adopts the technical scheme that the steel box girder hoisting synchronous lifting control device comprises a track fixedly arranged on a bridge cast-in-place section, a plurality of rhombic frames are arranged on the track side by side, every two adjacent rhombic frames are fixedly connected through a middle door beam, and an upper cross beam is arranged at the overhanging end of each rhombic frame; the two ends of the upper cross beam are each provided with a lifting mechanism, each lifting mechanism comprises a crane jack arranged on the upper cross beam, a guide frame is arranged on one side of each crane jack, the steel strand bypasses the guide frames and penetrates through the crane jacks, a lifting frame is fixedly arranged at the lower end of each steel strand, a lifting appliance is installed on each lifting frame, and each lifting appliance is fixedly connected with the corresponding steel box girder. The utility model has the beneficial effects that the laser transmitter can obtain the lifting height of a lifting structure in real time, and is matched with a high-precision synchronous lifting crane jack, so that the butt joint precision of a steel box girder and a bridge cast-in-place section is effectively improved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction equipment, in particular to a synchronous lifting control device for hoisting a steel box girder. Background Art

[0002] Compared with concrete beams, steel box beams are widely used in large-span bridges due to their light weight and good mechanical properties. The commonly used steel box beam lifting methods at home and abroad are: under floating conditions, large lifting equipment such as crane ships are used to lift and install the steel box beams in place; or bridge cranes are used to lift the steel box beam segments on the beam transport ship to the installation location to complete the installation.

[0003] In the existing steel box girder hoisting process, the steel box girder is suspended by cables through a bridge crane, and the position of the steel box girder is adjusted by operating the position of the boom. The operation is inconvenient, and it is difficult to align the hoisted steel box girder with the completed cantilever section. The two ends of the overall section steel box girder are not on the same horizontal line, which is prone to overturning and has a low safety factor. There is also a phenomenon that it cannot be accurately docked with the steel-concrete combined section, which not only increases the construction time, but also makes it difficult to ensure the docking quality. After repeatedly hoisting and adjusting the position of the steel box girder, the docking error is still large. The construction efficiency and construction safety need to be improved. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a synchronous lifting control device for hoisting a steel box girder.

[0005] The technical solution is as follows: it comprises a track fixedly arranged on the cast-in-place section of the bridge, a plurality of rhombus frames are arranged side by side on the track, two adjacent rhombus frames are fixedly connected by a middle door beam, and an upper cross beam is arranged at the cantilevered end of each rhombus frame;

[0006] A group of lifting mechanisms are respectively arranged at the two ends of the upper cross beam, and the lifting mechanisms include a crane jack arranged on the upper cross beam, a guide frame is arranged on one side of the crane jack, and also include a steel strand that bypasses the guide frame and passes through the crane jack, a hanger is fixedly arranged at the lower end of the steel strand, a hanger is installed on the hanger, and the hanger is fixedly connected to the steel box beam;

[0007] A laser emitter is fixedly mounted on each of the two ends of the upper cross beam, and a mounting seat is mounted on each of the two ends of the steel box beam. A reflective plate is detachably mounted on the mounting seat, and the reflective plate coincides with the projection of the laser emitter in the horizontal direction.

[0008] Preferably, the mounting seat comprises a rectangular bottom plate, two slide grooves are arranged in parallel on the bottom plate, two clamping plates are slidably arranged on the bottom plate, a slider is fixedly arranged at both ends of each clamping plate, and the slider slides in adjacent slide grooves.

[0009] Preferably, the clamping plates are in a U shape, and the open ends of the two clamping plates face each other.

[0010] Preferably, an assembly plate is fixedly arranged at each end of the clamping plate, and a positioning hole is formed in the assembly plate;

[0011] A plurality of threaded holes are arranged in an array on the bottom plate, the positioning holes on each assembly plate respectively correspond to one of the threaded holes, and the clamping plate is in threaded connection with the threaded hole through a bolt penetrating through the positioning hole.

[0012] Preferably, an installation hole is formed at each of the four corners of the bottom plate.

[0013] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are as follows: (1) By providing a detachable positioning base, the disassembly is simple, the positioning is convenient, it can be周转 used, and the cost is saved;

[0014] (2) The laser emitter can obtain the lifting height of the hoisting structure in real time, cooperate with the crane jacks for high-precision synchronous lifting, dynamically track and compare the lifting deviation on both sides of the steel box girder during the lifting process, and send an alarm signal when the deviation value exceeds the tolerance value, effectively improving the docking accuracy between the steel box girder and the cast-in-place section of the bridge and improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic view of the overall structure of the embodiment of the present invention Figure 1 .

[0016] Figure 2 It is a schematic view of the overall structure of the embodiment of the present invention Figure 2 .

[0017] Figure 3 It is a schematic view of the overall structure of the embodiment of the present invention Figure 3 .

[0018] Figure 4 It is a schematic view of the structure of the mounting seat of the embodiment of the present invention.

[0019] Among them, the reference numerals are: 1, diamond frame; 2, guide frame; 3, crane jack; 4, hoisting mechanism; 5, steel strand; 6, hanging frame; 7, lifting appliance; 8, steel box girder; 9, guide frame; 10, bottom longitudinal beam; 11, cast-in-place section of the bridge; 12, track; 13, upper cross beam; 14, laser emitter; 15, middle portal beam; 16, stiffening skeleton; 17, bottom plate; 18, clamping plate; 19, threaded hole; 20, bolt; 21, assembly plate; 22, chute; 23, slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] In the description of the invention of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention of the utility model 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 invention of the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the invention of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of the utility model can be understood according to specific circumstances.

[0024] Example 1

[0025] See also Figures 1 to 4 The utility model provides a synchronous lifting control device for hoisting a steel box girder, comprising a track 12 fixedly arranged on a cast-in-place section 11 of a bridge, a plurality of rhombus frames 1 arranged side by side on the track 12, two adjacent rhombus frames 1 are fixedly connected by a middle door beam 15, and an upper cross beam 13 is arranged at the cantilevered end of each rhombus frame 1;

[0026] After the construction of the cast-in-place section 11 of the bridge is completed, a guide beam 9 is set on the cast-in-place section 11 of the bridge. The guide beam 9 is fixedly connected to the cast-in-place section 11 of the bridge. Specifically, embedded parts can be set on the cast-in-place section 11 of the bridge, and then the guide beam 9 is fixedly connected to the embedded parts, and the bottom longitudinal beam 10 of the lower working platform is hung on the guide beam 9, facilitating the user to install the steel box girder 8 and the cast-in-place section 11 of the bridge through the lower working platform;

[0027] A set of hoisting mechanisms 4 are respectively arranged at both ends of the upper cross beam 13. The hoisting mechanism 4 includes a crane jack 3 arranged on the upper cross beam 13. A guide frame 2 is arranged on one side of the crane jack 3. It also includes a steel wire strand 5 that bypasses the guide frame 2 and passes through the crane jack 3. The lower end of the steel wire strand 5 is fixedly provided with a hanging frame 6, and a lifting tool 7 is installed on the hanging frame 6. The lifting tool 7 is fixedly connected to the steel box girder 8;

[0028] A laser emitter 14 is respectively fixedly arranged at both ends of the upper cross beam 13. An installation seat is respectively arranged at both ends of the steel box girder 8. A reflector is detachably arranged on the installation seat. The projection of the reflector in the horizontal direction coincides with that of the laser emitter 14.

[0029] The laser emitter 14 emits a laser beam. The receiver receives the laser reflected back by the reflector, converts it into an electrical signal and transmits it to the central controller. The control circuit is responsible for processing these signals and calculating the position and horizontal deviation of the lifted object, and drawing the height curves on both sides of the steel box girder. Through the laser emitter 14, the lifting height of the steel box girder 8 is obtained in real time. In cooperation with the high-precision synchronous lifting control system, the lifting deviation on both sides of the steel box girder 8 is dynamically tracked and compared during the lifting process, and an alarm signal is sent when the deviation value exceeds the tolerance limit. When the horizontal deviation of the steel box girder 8 is greater than a certain range, the central controller receives the signal and sends an automatic deviation correction instruction to the crane jack 3 to realize the dynamic adjustment of the horizontal deviation, prevent overturning, and ensure the construction efficiency and safety.

[0030] The installation seat includes a rectangular bottom plate 17. Two sliding grooves 22 are arranged in parallel on the bottom plate 17. Two clamping plates 18 are slidably arranged on the bottom plate 17. A slider 23 is respectively fixedly arranged at both ends of each clamping plate 18. The slider 23 slides in the adjacent sliding groove 22.

[0031] The clamping plate 18 is in a U shape, and the open ends of the two clamping plates 18 face each other.

[0032] An assembly plate 21 is respectively fixedly arranged at both ends of the clamping plate 18. A positioning hole is opened on the assembly plate 21;

[0033] A number of threaded holes 19 are arranged in an array on the bottom plate 17. The positioning holes on each assembly plate 21 respectively correspond to one of the threaded holes 19. The clamping plate 18 is threadedly connected to the threaded hole 19 through a bolt 20 passing through the positioning hole.

[0034] The four corners of the bottom plate 17 are respectively provided with a mounting hole, and the bottom plate 17 can be fixed to the steel box girder 8 by bolts passing through the mounting holes, thereby improving the stability of the bottom plate 17 when in use.

[0035] When the utility model is used, after the cast-in-place section 11 of the bridge is constructed, a lifting structure 4 and a laser transmitter 14 can be arranged on the upper cross beam 13, and the lifting structure 4 is used to lift the steel box girder 8 so that the steel box girder 8 is connected to the cast-in-place section 11 of the bridge, thereby completing the construction of the bridge.

[0036] After the steel box girder 8 is hoisted into place, a temporary fixed rigid frame 16 is arranged on the cast-in-place section 11 of the bridge, and the steel box girder 8 is temporarily fixed by the temporary fixed rigid frame 16 .

[0037] The guide beam 9 is then extended so that the extended section of the guide beam 9 supports the anchor section on the steel box beam 8, and then the bottom longitudinal beam 10 is moved on the guide beam 9 to the joint position, and then the formwork is set and concrete is poured to connect the cast-in-place section 11 of the bridge and the steel box beam 8.

[0038] The light crane formed by the combination of the diamond frame 1, the lifting structure 4 and the laser transmitter 14 can realize real-time monitoring of the lifting process of the steel box girder 8 and achieve synchronous lifting and hoisting of the steel box girder 8.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronous lifting control device for hoisting a steel box girder, characterized in that: It includes a track (12) fixedly arranged on the cast-in-place section (11) of the bridge. A number of diamond frames (1) are arranged side by side on the track (12). Adjacent two diamond frames (1) are fixedly connected by a middle portal beam (15). An upper cross beam (13) is arranged at the cantilever end of each diamond frame (1). A set of hoisting mechanisms (4) are respectively arranged at both ends of the upper cross beam (13). The hoisting mechanism (4) includes a crane jack (3) arranged on the upper cross beam (13). A guide frame (2) is arranged on one side of the crane jack (3). It also includes a steel wire rope (5) that bypasses the guide frame (2) and passes through the crane jack (3). The lower end of the steel wire rope (5) is fixedly provided with a hanging frame (6). A lifting tool (7) is installed on the hanging frame (6). The lifting tool (7) is fixedly connected to the steel box girder (8). A laser emitter (14) is respectively fixedly arranged at both ends of the upper cross beam (13). An installation seat is respectively arranged at both ends of the steel box girder (8). A reflector is detachably arranged on the installation seat. The projection of the reflector in the horizontal direction coincides with that of the laser emitter (14).

2. The steel box girder hoisting synchronous lifting control device according to claim 1 is characterized in that: The installation seat includes a rectangular bottom plate (17). Two sliding grooves (22) are arranged in parallel on the bottom plate (17). Two clamping plates (18) are slidably arranged on the bottom plate (17). A slider (23) is respectively fixedly arranged at both ends of each clamping plate (18). The slider (23) slides in the adjacent sliding groove (22).

3. The steel box girder hoisting synchronous lifting control device according to claim 2 is characterized in that: The clamping plate (18) is in a U shape. The open ends of the two clamping plates (18) face each other.

4. The steel box girder hoisting synchronous lifting control device according to claim 3 is characterized in that: An assembly plate (21) is respectively fixedly arranged at both ends of the clamping plate (18). A positioning hole is formed on the assembly plate (21). A number of threaded holes (19) are arranged in an array on the bottom plate (17). The positioning holes on each assembly plate (21) respectively correspond to one of the threaded holes (19). The clamping plate (18) is threadedly connected to the threaded hole (19) through a bolt (20) passing through the positioning hole.

5. The steel box girder hoisting synchronous lifting control device according to claim 3 is characterized in that: An installation hole is respectively formed at the four corners of the bottom plate (17).

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