A mesh cable-threading rotating lifting device for the main arch of an arch bridge

Abstract

The present invention provides a mesh cable-threading rotating and lifting device for the main arch of an arch bridge, comprising a main arch to be rotated, an arch foot ball joint arranged at the arch bottom at both ends of the main arch to be rotated, a movable pulley block arranged at both sides of the main arch to be rotated, a cable tower body vertically arranged on the bridge deck, a winch arranged on the bridge deck, an upper lifting mechanism arranged at the top of the cable tower body and a lower lifting mechanism arranged at the bottom of the cable tower body, and a cable, wherein the cable connects the movable pulley block and the upper lifting mechanism, the lower lifting mechanism and the winch, and the movable pulley block comprises a plurality of movable pulley mechanisms arranged equidistantly along the arc surface of the main arch to be rotated, and the movable pulley mechanisms on the two arc surfaces of the main arch to be rotated are arranged correspondingly to each other. The present invention makes full use of the symmetry of the main arch to be rotated, evenly arranges movable pulley blocks on its side, changes the force direction through the upper lifting mechanism and the lower lifting mechanism, provides power through the winch, and arranges the arch foot ball joint at the bottom of the main arch to be rotated, thereby realizing the convenient rotation of the main arch, improving the construction efficiency, and shortening the construction period.

Description

Technical Field

[0001] The invention belongs to the technical field of arch bridge construction, and in particular relates to a mesh cable-threading, rotating and lifting device for a main arch of an arch bridge. Background Art

[0002] Nowadays, the country is promoting the development of steel structure bridges in the construction field. Steel structure bridges are emerging in various parts of the country. Arch bridges, as one of the main forms of long-span bridges, are widely used in highways, high-speed railways, municipal engineering and other fields. The construction methods of the main arch include bracket method, large-tonnage hoisting method, cable tower method, etc., but they all have certain disadvantages. The bracket method consumes a large amount of turnover steel, and the large-tonnage hoisting method requires large-tonnage lifting equipment, which has harsh use conditions, a small scope of application, and inconvenient construction. Summary of the invention

[0003] The invention provides a mesh cable-threading rotating and lifting device for the main arch of an arch bridge, which has balanced overall force and is easy to operate, thus facilitating the rotation and lifting of the main arch of the arch bridge and improving construction efficiency.

[0004] The technical solution of the present invention is: a mesh cable-threading rotating and lifting device for the main arch of an arch bridge, comprising a main arch to be rotated, an arch foot ball joint arranged at the arch bottom at both ends of the main arch to be rotated, a movable pulley group arranged on both sides of the main arch to be rotated, a cable tower body vertically arranged on the bridge deck, a winch placed on the bridge deck, an upper lifting mechanism arranged at the top of the cable tower body and a lower lifting mechanism arranged at the bottom of the cable tower body, and a cable, wherein the cable connects the movable pulley group and the upper lifting mechanism, the lower lifting mechanism and the winch, and the movable pulley group includes a plurality of movable pulley mechanisms equidistantly arranged along the arc surface of the main arch to be rotated, and the movable pulley mechanisms on the two arc surfaces of the main arch to be rotated are arranged corresponding to each other.

[0005] According to a further solution, the movable pulley mechanism includes a base plate, a fixing bolt, a limiting plate, a movable pulley, and a pin shaft. The base plate is provided with a plurality of screw holes. The fixing bolt passes through the screw holes to fix the base plate to the side of the main arch to be rotated. There are two limiting plates, which are arranged parallel to each other and perpendicular to the base plate. One of the limiting plates is provided with a mounting hole. The pin shaft passes through the mounting hole to rotationally connect the movable pulley and the limiting plate.

[0006] According to a further solution, the cable tower body is formed by four cable tower columns arranged along the vertices of a quadrilateral.

[0007] The scheme further comprises an upper longitudinal beam longitudinally arranged at the top of the cable tower body, an upper cross beam vertically arranged above the upper longitudinal beam, a static pulley 1 arranged above the upper cross beam, a fixing pin 1 for installing and fixing the static pulley 1, a fixing plate 1, a bottom plate 2, and a fixing bolt 2, wherein the bottom plate 2 is provided with a screw hole, and the fixing bolt 2 passes through the screw hole to fix the bottom plate 2 to the upper cross beam, the fixing plate 1 is vertically arranged on the bottom plate 2, and the static pulley 1 is arranged in the middle of the fixing plate 1 through a fixing pin 1.

[0008] The scheme further comprises a lower longitudinal beam longitudinally arranged on the bridge deck, a static pulley 2 arranged above the lower longitudinal beam, a fixing pin 2 for installing and fixing the static pulley 2, a fixing plate 2, a bottom plate 3, and a fixing bolt 3. The bottom plate 3 is provided with a screw hole. The fixing bolt 3 passes through the screw hole to fix the bottom plate 3 to the lower longitudinal beam. The fixing plate 2 is vertically arranged on the bottom plate 3, and the static pulley 2 is arranged in the middle of the fixing plate 2 through the fixing pin 2.

[0009] In a further embodiment, the fixed plate 1 and the fixed plate 2 are U-shaped structural plates or consist of two parallel flat plates, and the static pulley 1 and the static pulley 2 are respectively arranged in the middle of the opening end of the U-shaped structural plate or between the two flat plates.

[0010] In a further solution, the lower longitudinal beam is arranged at the center of the bottom of the cable tower body.

[0011] According to a further solution, the number of the upper longitudinal beam, the upper cross beam and the lower longitudinal beam is 2 each, the number of the static pulley 1 and the static pulley 2 is 4, and they are symmetrically arranged in pairs on the upper cross beam and the lower longitudinal beam respectively, and the static pulley 1 and the static pulley 2 are arranged along the same vertical line with the centers coinciding.

[0012] In a further solution, the arrangement directions of the static pulley 1 and the static pulley 2 are perpendicular to each other, the static pulley 1 converts the force direction into vertical, and the static pulley 2 converts the force direction from vertical to horizontal.

[0013] According to a further solution, there are two cables with four rope ends, which cross each other, pass through the movable pulley and are then connected to the winch through static pulley 1 and static pulley 2.

[0014] According to a further solution, the number of the winches is four, which are symmetrically arranged at both ends of the cable tower body.

[0015] The advantages of the present invention are: the present invention fully utilizes the symmetry of the main arch to be rotated, evenly arranges movable pulley groups on its side, changes the force direction through the upper lifting mechanism and the lower lifting mechanism, provides power through the winch, and arranges an arch foot ball joint at the bottom of the main arch to be rotated. The arch foot ball joint is a device for fixing the arch foot fulcrum during the rotation process. At the same time, this fulcrum is designed as a ball joint, which can realize rotation, realizes the convenient rotation of the main arch, improves construction efficiency, and shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a mesh cable-threading rotating body lifting device for the main arch of an arch bridge of the present invention;

[0017] Figure 2 It is a cross-sectional structural schematic diagram of a mesh cable-threading rotating body lifting device for the main arch of an arch bridge according to the present invention;

[0018] Figure 3 It is a schematic diagram of the installation structure of a movable pulley mechanism of a mesh cable-threading rotating body lifting device for the main arch of an arch bridge according to the present invention;

[0019] Figure 4 It is a structural schematic diagram of a lifting mechanism of a mesh-type cable-threading rotating lifting device for a main arch of an arch bridge according to the present invention;

[0020] Figure 5 It is a structural schematic diagram of an upper lifting mechanism of a mesh-type cable-threading rotating lifting device for a main arch of an arch bridge according to the present invention;

[0021] Figure 6 It is a structural schematic diagram of a lower lifting mechanism of a mesh-type cable-threading rotating lifting device for a main arch of an arch bridge according to the present invention;

[0022] Among them: 1. Arch foot ball joint, 2. Main arch to be rotated, 3. Moving pulley mechanism, 31. Bottom plate one, 32. Fixing bolt one, 33. Limiting plate, 34. Moving pulley, 35. Pin shaft, 4. Cable, 5. Upper lifting mechanism, 51. Upper longitudinal beam, 52. Upper cross beam, 53. Static pulley one, 54. Fixing pin one, 55. Fixing plate one, 56. Bottom plate two, 57. Fixing bolt two, 6. Cable tower body, 7. Lower lifting mechanism, 71. Lower longitudinal beam, 72. Bottom plate three, 73. Fixing bolt three, 74. Fixing plate two, 75. Fixing pin two, 76. Static pulley two, 8. Winch. DETAILED DESCRIPTION

[0023] The present invention is described clearly and completely below in conjunction with the accompanying drawings so that those skilled in the art can fully implement the present invention without having to make any creative work.

[0024] like Figure 1-6 As shown, a mesh cable-threaded rotating body lifting device for the main arch of an arch bridge comprises a main arch 2 to be rotated, an arch foot ball joint 1 arranged at the arch bottoms at both ends of the main arch 2 to be rotated, a movable pulley block arranged at both sides of the main arch 2 to be rotated, a cable tower body 6 vertically arranged on the bridge deck, a winch 8 arranged on the bridge deck, an upper lifting mechanism 5 arranged at the top of the cable tower body 6 and a lower lifting mechanism 7 arranged at the bottom of the cable tower body 6, and a cable 4, wherein the cable 4 connects the movable pulley block and the upper lifting mechanism 5, the lower lifting mechanism 7 and the winch 8, and the movable pulley block is arranged on both sides of the main arch 2 to be rotated, and the cable 4 is connected to the movable pulley block and the upper lifting mechanism 5, the lower lifting mechanism 7 and the winch 8. The wheel group includes a plurality of movable pulley mechanisms 3 equidistantly arranged along the arc surface of the main arch 2 to be rotated, the movable pulley mechanisms 3 on the two arc surfaces of the main arch 2 to be rotated are arranged corresponding to each other so that the force can be balanced, and the number of movable pulley mechanisms 3 is determined according to the weight of the main arch 2 to be rotated and the lifting capacity of the winch 8. The cable 4 is made of oily steel wire rope, and the arch foot ball 1 is a box-type spherical hinge, which can realize the rotation of the main arch 2 to be rotated in the vertical plane, and the main arch 2 to be rotated is rotated under the premise that the axis of the arch foot position remains unchanged.

[0025] The present invention further preferably comprises a movable pulley mechanism 3 comprising a base plate 31, a fixing bolt 32, a limiting plate 33, a movable pulley 34 and a pin 35, wherein the base plate 31 is provided with a plurality of screw holes, and the fixing bolt 32 passes through the screw holes to fix the base plate 31 to the side of the main arch 2 to be rotated, and there are two limiting plates 33 which are arranged parallel to each other and perpendicular to the base plate 31, wherein one of the limiting plates 33 is provided with a mounting hole, and the pin 35 passes through the mounting hole to rotatably connect the movable pulley 34 and the limiting plate 33, so that the movable pulley 34 can freely rotate and adjust the direction according to the direction of the cable 4, thereby ensuring that the movable pulley 34 is subjected to balanced force during the rotation process.

[0026] The present invention further preferably comprises four cable tower bodies 6 which are arranged along quadrilateral vertices, and the square structure enables balanced force.

[0027] The present invention further, preferably, the upper lifting mechanism 5 includes an upper longitudinal beam 51 longitudinally arranged at the top of the cable tower body 6, an upper cross beam 52 vertically arranged above the upper longitudinal beam 51, a static pulley 53 arranged above the upper cross beam 52, a fixing pin 54 for installing and fixing the static pulley 53, a fixing plate 55, a bottom plate 56, and a fixing bolt 57. The bottom plate 56 is provided with a screw hole, and the fixing bolt 57 passes through the screw hole to fix the bottom plate 56 to the upper cross beam 52. There are two fixing plates 55, which are parallel to each other and vertically arranged to the bottom plate 56. The static pulley 53 is arranged between the fixing plates 55 through the fixing pin 54.

[0028] The present invention further, preferably, the lower lifting mechanism 7 includes a lower longitudinal beam 71 longitudinally arranged on the bridge deck, a static pulley 76 arranged above the lower longitudinal beam 71, a fixing pin 75 for installing and fixing the static pulley 76, a fixing plate 74, a bottom plate 72, and a fixing bolt 73. The bottom plate 72 is provided with screw holes, and the fixing bolts 73 pass through the screw holes to fix the bottom plate 72 to the lower longitudinal beam 71. There are two fixing plates 74, which are parallel to each other and perpendicular to the bottom plate 72. The static pulley 76 is arranged between the fixing plates 74 through the fixing pin 75.

[0029] The present invention further preferably comprises that the fixing plate 1 55 and the fixing plate 2 74 are U-shaped structural plates, and the static pulley 1 53 and the static pulley 2 76 are respectively arranged in the middle of the opening ends of the U-shaped structural plates.

[0030] According to the present invention, preferably, the lower longitudinal beam 71 is arranged at the center of the bottom of the cable tower body 6 .

[0031] The present invention further preferably has two upper longitudinal beams 51, upper cross beams 52 and lower longitudinal beams 71, and four static pulleys 53 and 76, which are symmetrically arranged in pairs on the upper cross beam 52 and the lower longitudinal beam 71, respectively. The static pulleys 53 and 76 are arranged along the same vertical line with their centers overlapping, so that the cable 4 can be arranged vertically downward.

[0032] The present invention further, preferably, the setting directions of the static pulley 53 and the static pulley 76 are perpendicular to each other, the static pulley 53 converts the traction direction at the top center of the main arch 2 to be rotated from horizontal to vertical, leads it to the bottom of the pylon 6 and is connected with the static pulley 76, and the static pulley 76 converts the vertical force pulled by it into horizontal traction to the winch 8, which provides power.

[0033] The present invention further, preferably, has two cables 4 with four rope ends, which cross each other, pass through the movable pulley 34, and are then connected to the winch 8 through the static pulley 1 53 and the static pulley 2 76. The winding relationship between the cable 4 and the movable pulley group is similar to the ordinary "threading shoelaces" method.

[0034] The present invention further preferably comprises four winches 8 which are symmetrically arranged at both ends of the cable tower body 6 and connected to four rope ends of the cable 4 to start working synchronously to realize the rotation of the main arch 2 to be rotated.

[0035] The preferred embodiments of the present invention are described above. It should be pointed out that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any simple modifications, equivalent changes and modifications made to the above embodiments by any technician familiar with the art based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A mesh cable-threading rotating lifting device for the main arch of an arch bridge, characterized in that: It comprises a main arch to be rotated, arch foot ball joints arranged at the arch bottoms at both ends of the main arch to be rotated, movable pulley blocks arranged at both sides of the main arch to be rotated, a cable tower body vertically arranged on the bridge deck, a winch arranged on the bridge deck, an upper lifting mechanism arranged at the top of the cable tower body, a lower lifting mechanism arranged at the bottom of the cable tower body, and a cable, wherein the cable connects the movable pulley block and the upper lifting mechanism, the lower lifting mechanism and the winch, the movable pulley block comprises a plurality of movable pulley mechanisms arranged equidistantly along the arc surface of the main arch to be rotated, and the movable pulley mechanisms on the two arc surfaces of the main arch to be rotated are arranged correspondingly to each other; The movable pulley mechanism includes a bottom plate, a fixing bolt, a limiting plate, a movable pulley, and a pin shaft. The bottom plate is provided with a plurality of screw holes. The fixing bolt passes through the screw holes to fix the bottom plate to the side of the main arch to be rotated. There are two limiting plates, which are arranged parallel to each other and perpendicular to the bottom plate. One of the limiting plates is provided with a mounting hole. The pin shaft passes through the mounting hole to rotatably connect the movable pulley and the limiting plate. The cable tower body is formed by four cable tower columns arranged along the vertices of a quadrilateral. The upper lifting mechanism includes an upper longitudinal beam longitudinally arranged at the top of the cable tower body, An upper crossbeam vertically arranged above the upper longitudinal beam, a static pulley 1 arranged above the upper crossbeam, a fixing pin 1 for installing and fixing the static pulley 1, a fixing plate 1, a bottom plate 2, and a fixing bolt 2, wherein the bottom plate 2 is provided with a screw hole, and the fixing bolt 2 passes through the screw hole to fix the bottom plate 2 to the upper crossbeam, the fixing plate 1 is vertically arranged on the bottom plate 2, and the static pulley 1 is arranged in the middle of the fixing plate 1 through a fixing pin 1; the lower lifting mechanism includes a lower longitudinal beam longitudinally arranged on the bridge deck, a static pulley 2 arranged above the lower longitudinal beam, a fixing pin 2 for installing and fixing the static pulley 2, a fixing A fixed plate 2, a bottom plate 3, and a fixing bolt 3. The bottom plate 3 is provided with a screw hole. The fixing bolt 3 passes through the screw hole to fix the bottom plate 3 to the lower longitudinal beam. The fixed plate 2 is vertically arranged on the bottom plate 3. The static pulley 2 is arranged in the middle of the fixed plate 2 through the fixing pin 2. The number of the upper longitudinal beam, the upper cross beam, and the lower longitudinal beam is 2. The number of the static pulley 1 and the static pulley 2 is 4, which are symmetrically arranged on the upper cross beam and the lower longitudinal beam respectively. The static pulley 1 and the static pulley 2 are arranged along the same vertical line, and the centers coincide. The static pulley 1 and the static pulley 2 The setting directions are perpendicular to each other, the static pulley 1 converts the force direction into vertical, and the static pulley 2 converts the force direction from vertical to horizontal; there are 2 cables with 4 rope ends, which cross each other and pass through the movable pulley and then connect to the winch through the static pulley 1 and the static pulley 2; the number of movable pulley mechanisms is determined according to the weight of the main arch to be rotated and the lifting capacity of the winch, the cable adopts oily steel wire rope, and the arch foot ball joint is a box chamber spherical joint, which can realize the rotation of the main arch to be rotated in the vertical plane, and ensure that the main arch to be rotated rotates under the premise that the position axis of the arch foot remains unchanged.

2. The arch bridge main arch mesh cable rotation lifting device according to claim 1, characterized in that: The fixed plate 1 and the fixed plate 2 are U-shaped structural plates or are composed of two parallel flat plates. The static pulley 1 and the static pulley 2 are respectively arranged in the middle of the opening end of the U-shaped structural plate or between the two flat plates.

3. The arch bridge main arch mesh cable rotation lifting device according to claim 2, characterized in that: The lower longitudinal beam is arranged at the center of the bottom of the cable tower body.

4. The arch bridge main arch mesh cable rotation lifting device according to claim 3, characterized in that: The number of the winches is 4, which are symmetrically arranged at both ends of the cable tower body.

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