Buckle cable type overhead crane

Abstract

A buckle cable type overhead crane comprises main trusses arranged in the longitudinal bridge direction, a transverse linkage beam arranged between the main trusses, a longitudinal distribution beam arranged on the transverse linkage beam, a lifting system arranged on the longitudinal distribution beam, a transverse parallel connection arranged in the middle of the main trusses, a supporting base arranged below a middle stand column of the main trusses, and the front ends of the main trusses and crane buckle cables are connected and anchored. A pressing anchor and a reverse buckling wheel are arranged on the rear portion of the main truss, a track is laid below the main truss correspondingly, and the track is fixed to an arch rib through a bearing beam, a pressing beam and a counter-force support. According to the utility model, the buckle cable is used for providing a front fulcrum for the arch crane, and the buckle cable is supported and anchored by using the existing buckle tower and the ground anchor, so that good economical efficiency is achieved; according to the device, a stress system of an arch crane is changed, a traditional cantilever structure is changed into a simple support structure, the material consumption of the crane structure is greatly reduced under the condition that the hoisting capacity of the crane is not changed, or the hoisting capacity of the crane is greatly improved under the condition that the original material consumption of the crane is not changed, and the stress state of an arch rib is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction, in particular to a cable-supported overhead crane on an arch bridge. Background Art

[0002] The cable-stayed and buckled hanging method is a mature construction technology in the non-shoring construction of the arch rib of an arch bridge. The method is to set up buckling towers on both banks, and the installed arch rib is temporarily fixed through buckling cables, and the linear shape of the arch rib can be adjusted by adjusting the cable force of the buckling cables. The hoisting methods of the arch rib include the crane method, the cableway crane method and the overhead crane method on the arch. The crane method is restricted by many site conditions and is rarely used; the cableway crane method has a high cost and limited lifting capacity. Especially for long-span arch bridges, the cableway crane method is also restricted; the overhead crane method on the arch has the advantages of low cost, strong lifting capacity and convenient construction. The traditional overhead crane on the arch is a cantilever structure. With the improvement of the lifting capacity, the self-weight of the crane also increases, and the construction load has become the control load for the design of the arch rib structure. The force system of the overhead crane on the arch needs to be improved urgently. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides a cable-supported overhead crane on an arch, which overcomes the disadvantages of the existing overhead crane on the arch, such as large self-weight, large construction load and high requirements for the force of the arch rib structure.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A cable-supported overhead crane on an arch includes a main truss arranged longitudinally along the bridge, a transverse connecting beam is arranged between the main trusses, a longitudinal distribution beam is arranged on the transverse connecting beam, a lifting system is arranged on the longitudinal distribution beam, a transverse bracing is arranged in the middle of the main truss, a support bearing is arranged under the middle column of the main truss, the front end of the main truss is connected and anchored with the crane buckling cable, a pressure anchor and a reverse pulley are arranged at the rear of the main truss, and a track is laid corresponding to the lower part of the main truss. The track is fixed on the arch rib through a cushion beam, a pressure beam and a reaction support.

[0006] The main truss is a diamond structure made of welded steel sections, including an upper chord, a lower chord, a front compression bar and a rear tension bar. A middle column is connected between the rear end of the upper chord and the front end of the lower chord.

[0007] The lower chord of the main truss corresponds to the track, and a reverse pulley is arranged at the rear of the lower chord. The reverse pulley is on both sides of the web of the track, and the reverse pulley supports on the flange of the track.

[0008] A pressure anchor is arranged at the rear of the main truss. The pressure anchor is located above the lower chord. The pressure anchor is made of welded steel sections and steel plates, and the pressure anchor is fixed on the arch rib through threaded steel bars and bolts.

[0009] The support bearing is made of welded steel plates.

[0010] The described track is an I-beam steel. The bearing beam is laid on the surface of the arch rib. A compression beam is transversely arranged above the track, and the compression beam is connected to the arch rib through threaded steel bars and nuts.

[0011] The described reaction support is arranged at the end of the track. The reaction support is a bracket structure welded by steel plates, and the reaction support is connected to the arch rib through high-strength bolts.

[0012] The front end of the upper chord of the main truss is anchored and connected to the front end of the hoist cable of the crane. The hoist cable of the crane is a full-length steel strand. A tensioning platform and a tensioning jack are provided at the front end of the hoist cable of the crane. The rear end of the hoist cable of the crane crosses the buckle tower and the saddle and is anchored to the anchor block on the ground.

[0013] The described transverse connection beam is a steel section. The two ends of the transverse connection beam are respectively welded to the front end of the upper chord of the main truss. The longitudinal distribution beam is a steel section, and the longitudinal distribution beam is welded above the transverse connection beam.

[0014] The described lifting system is arranged at the front end of the upper chord of the main truss. A lifting tool is arranged under the lifting cable connected by the lifting system, and the lifting tool is connected to the arch rib segment to be lifted.

[0015] The beneficial effects of the present utility model: The present utility model uses the cable to provide a front support point for the overhead crane on the arch. The cable is supported and anchored by the existing buckle tower and ground anchor, which has good economy; this device changes the force system of the overhead crane on the arch, changing from the traditional cantilever structure to a simply supported structure. Without changing the lifting capacity of the crane, the amount of structural materials of the crane can be greatly reduced, or without changing the original amount of materials of the crane, the lifting capacity of the crane can be greatly increased, improving the stress state of the arch rib, greatly reducing the reaction force requirement of the crane on the arch rib, and reducing the construction load. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present utility model.

[0017] Figure 2 It is a construction schematic diagram of the present utility model.

[0018] Figure 3 It is a schematic diagram of the construction steps of the present utility model.

[0019] Wherein: 1 - reaction support; 2 - bearing beam; 3 - track; 4 - compression beam; 5 - back pulley; 6 - support bearing; 7 - compression anchor; 8 - rear tie rod; 9 - lower chord; 10 - front compression bar; 11 - middle column; 12 - upper chord; 13 - hoist cable of the crane; 14 - lifting system; 15 - tensioning jack; 16 - tensioning platform; 17 - lifting cable; 18 - lifting tool; 19 - arch rib to be lifted; 20 - erected arch rib; 21 - arch rib cable; 22 - buckle tower; 23 - saddle; 24 - anchor block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] A cable - buckling type overhead crane includes a main truss arranged longitudinally along the bridge. A transverse connecting beam is arranged between the main trusses. A longitudinal distribution beam is arranged on the transverse connecting beam. A hoisting and lifting system 14 is arranged on the longitudinal distribution beam. The hoisting and lifting system 14 is a through - hole type hydraulic jack. A transverse bracing is arranged in the middle of the main truss. A support bearing 6 is arranged under the middle column 11 of the main truss. The support bearing 6 is welded by steel plates. A bracing truss is arranged between the middle columns 11 of the main truss. The front end of the main truss is connected and anchored to the crane cable - buckling 13. A pressure anchor 7 and a reverse pulley 5 are arranged at the rear of the main truss. A track 3 is laid corresponding to the lower part of the main truss. The track 3 is fixed on the arch rib through a cushion beam 2, a pressure beam 4 and a reaction support 1.

[0021] The main truss is a diamond - shaped structure made of welded steel sections, including an upper chord 12, a lower chord 9, a front compression bar 10 and a rear tension bar 8. A middle column 11 is connected between the rear end of the upper chord 12 and the front end of the lower chord 9.

[0022] The lower chord 9 of the main truss corresponds to the track 3. A reverse pulley 5 is arranged at the rear of the lower chord 9. The reverse pulley 5 is on both sides of the web of the track 3, and the reverse pulley 5 supports on the flange of the track 3.

[0023] A pressure anchor 7 is arranged at the rear of the main truss. The pressure anchor 7 is located above the lower chord 9. The pressure anchor 7 is made of welded steel sections and steel plates. The pressure anchor 7 is fixed on the arch rib through threaded steel bars and bolts.

[0024] The track 3 is an I - shaped steel. The cushion beam 2 is laid on the surface of the arch rib. The pressure beam 4 is arranged horizontally above the track 3. The pressure beam 4 is connected to the arch rib through threaded steel bars and nuts.

[0025] The reaction support 1 is arranged at the end of the track 3. The reaction support 1 is a bracket structure welded by steel plates. The reaction support 1 is connected to the arch rib through high - strength bolts.

[0026] The front end of the upper chord 12 of the main truss is fixedly connected and anchored to the front end of the crane cable - buckling 13. The crane cable - buckling 13 is a full - length steel strand. A tensioning platform 16 and a tensioning jack 15 are arranged at the front end of the crane cable - buckling 13. The rear end of the crane cable - buckling 13 passes over the cable tower 22 and the saddle 23 and is anchored to the ground anchor 24.

[0027] The transverse connecting beam is made of steel sections. The two ends of the transverse connecting beam are respectively welded to the front end of the upper chord 12 of the main truss. The longitudinal distribution beam is made of steel sections. The longitudinal distribution beam is welded above the transverse connecting beam.

[0028] The hoisting and lifting system 14 is arranged at the front end of the upper chord 12 of the main truss. A lifting sling 17 connected to the hoisting and lifting system 14 is arranged with a lifting appliance 18 below. The lifting appliance 18 is connected to the segment of the arch rib 19 to be lifted.

[0029] During construction, the construction steps are as follows:

[0030] S1. Conduct ground construction of the anchor block 24, erect the buckling tower 22, and install the arch seat and arch foot sections.

[0031] S2. Construct the arch rib by the cable-stayed buckling suspension method, install the starting section of the arch rib, and stretch the arch rib buckling cable 21.

[0032] S3. Install the traveling track 3 of the arch-mounted crane, install the reaction support 1, pass bolts through the reserved holes on the top surface of the arch rib to fix the reaction support 1 on the top surface of the arch rib, lay the track cushion beam 2, lay the track 3, the tail end of the track 3 abuts against the reaction support 1, install the track compression beam 4, the track compression beam 4 is fixed to the top surface of the arch rib by bolts, install the reverse pulley 5 and the support bearing 6, assemble the main truss, connect the tail of the lower chord 9 to the reverse pulley 5, install the pressure anchor 7 and fix it at the tail end of the lower chord 9, fix the front end of the lower chord 9 on the support bearing 6, continue to assemble the middle column 11, the rear tie rod 8, the front compression bar 10 and the upper chord 12 of the main truss, install the main truss horizontal bracing, install the transverse connection beam and the longitudinal distribution beam, install the lifting system 14, and then install the tensioning platform 16.

[0033] S4. Install the crane buckling cable 13, fix the tail end of the crane buckling cable 13 on the anchor block 24, anchor the front end of the crane buckling cable 13 on the front end of the upper chord 12 of the main truss, and conduct the first tensioning, so that the arch-mounted crane becomes a simply supported stress system.

[0034] S5. Wait for the erected arch rib 19 to be in place and connect it to the lifting appliance 18, the lifting system 14 conducts the initial lifting of the arch rib, after stabilization, conduct the second tensioning of the crane buckling cable 13, and adjust the force distribution of the front suspension point of the main truss and the support point of the middle column 11.

[0035] S6. Lift the arch rib 19 to be erected in place, accurately position it and then connect it to the already erected arch rib 20. After the connection is completed, release the prestress of the crane buckling cable 13, move the crane forward, and install the next section of the arch rib.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The above has described the embodiments of the present utility model in detail, but the above content is only the preferred embodiments of the present utility model and should not be considered as limiting the scope of implementation of the present utility model. Any equivalent changes and improvements made in accordance with the scope of the application of the present utility model shall still fall within the scope covered by the patent of the present utility model.

Claims

1. A cable-type arch hoist, characterized in that: The invention comprises a main truss arranged in the longitudinal direction of the bridge, a transverse connecting beam arranged between the main trusses, a longitudinal distribution beam arranged on the transverse connecting beam, a lifting system (14) arranged on the longitudinal distribution beam, a transverse parallel connection arranged in the middle of the main truss, a supporting seat (6) arranged under the middle column (11) of the main truss, a front end of the main truss connected and anchored with a crane cable (13), a pressure anchor (7) and a buckle wheel (5) arranged at the rear of the main truss, a track (3) laid under the corresponding lower part of the main truss, and the track (3) fixed on the arch rib through a cushion beam (2), a pressure beam (4) and a reaction support (1).

2. The cable-stayed arch hoist according to claim 1, characterized in that: The main truss is a diamond-shaped structure made of welded steel sections, comprising an upper chord (12), a lower chord (9), a front compression rod (10) and a rear tension rod (8), wherein a center column (11) is connected between the rear end of the upper chord (12) and the front end of the lower chord (9).

3. The cable-stayed arch hoist according to claim 1, characterized in that: The lower chord (9) of the main truss corresponds to the track (3), and a reverse wheel (5) is arranged at the rear of the lower chord (9). The reverse wheels (5) are on both sides of the web of the track (3), and the reverse wheels (5) are supported on the flange of the track (3).

4. The buckle-cable arch hoist according to claim 3, characterized in that: A pressure anchor (7) is arranged at the rear of the main truss. The pressure anchor (7) is located above the lower chord (9). The pressure anchor (7) is welded from a steel section and a steel plate. The pressure anchor (7) is fixed to the arch rib by means of threaded steel and bolts.

5. The buckle-cable arch hoist according to claim 4, characterized in that: The support base (6) is made of welded steel plates.

6. The cable-stayed arch hoist according to claim 1, characterized in that: The track (3) is an I-shaped steel, the cushion beam (2) is laid on the surface of the arch rib, and a pressure beam (4) is arranged horizontally above the track (3), and the pressure beam (4) is connected to the arch rib through threaded steel bars and nuts.

7. The buckle-cable arch hoist according to claim 1, characterized in that: The reaction force support (1) is arranged at the rear end of the track (3); the reaction force support (1) is a corbel structure welded from steel plates; the reaction force support (1) is connected to the arch rib via high-strength bolts.

8. The cable-stayed arch hoist according to claim 1, characterized in that: The front end of the upper chord (12) of the main truss is anchored to the front end of the crane cable (13). The crane cable (13) is a full-length steel strand. The front end of the crane cable (13) is provided with a tensioning platform (16) and a tensioning jack (15). The rear end of the crane cable (13) crosses the cable tower (22) and the cable saddle (23) and is anchored to an anchor (24) on the ground.

9. The cable-stayed arch hoist according to claim 1, characterized in that: The transverse connecting beam is a steel section, and the two ends of the transverse connecting beam are respectively welded to the front end of the upper chord (12) of the main truss; the longitudinal distribution beam is a steel section, and the longitudinal distribution beam is welded above the transverse connecting beam.

10. The cable-stayed arch hoist according to claim 1, characterized in that: The lifting system (14) is arranged at the front end of the upper chord (12) of the main truss, and a sling (18) is arranged under the lifting rope (17) connected to the lifting system (14), and the sling (18) is connected to the arch rib (19) segment to be lifted.

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