Tower top hanging bracket for curved cable bent tower

Abstract

The tower top hanging bracket comprises a steel pipe stand column, a truss pull rod, a base, a main truss, a small steering portal frame, a winch, a plurality of pulley blocks, an upper transverse rod steel hanging rope and a lower transverse rod steel hanging rope. Two main trusses are arranged at the top of the steel pipe stand column, and bearing beams and two winches are symmetrically arranged in the middle of the bottom of the main trusses; small steering portals are arranged at the two ends of the bottom of the main truss, lower transverse rod steel slings of the small steering portals wind the first pulley block and the second pulley block, upper transverse rod steel slings of the small steering portals are connected with the third pulley block, and a winch is connected with a steel cable to steer to the second pulley block through the third pulley block to drive the second pulley block to move up and down for hoisting. The vertical face positions of the upper transverse rod steel hanging rope and the lower transverse rod steel hanging rope at the lifting point of the lower transverse rod of the small steering portal frame are adjusted according to the installation position of the stay cable, convenient transposition is achieved, and it is not needed to disassemble and assemble a tower top hanging bracket again or arrange power sliding equipment to increase the workload and the burden of a cable bent tower.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction equipment, and particularly relates to a tower top hanging bracket for a curved cable tower. Background Art

[0002] During the construction of a cable-stayed bridge, it is necessary to build a tower top hanging bracket at the top of the cable tower for hoisting the stay cables. On the one hand, it ensures that the stay cables can reach the designated positions of the cable tower for installation, and on the other hand, it requires the tower top hanging bracket to correctly tension the stay cables so that the stay cables can support the bridge deck structure. The traditional conventional tower top hanging bracket needs to be equipped with components such as motors and slide rails to move the hanging points of the pulley block, resulting in a relatively heavy self-weight of the tower top hanging bracket; and the current tower top hanging brackets are only applicable to cable towers with relatively regular structures. Nowadays, the cable tower structures are gradually evolving into special-shaped structures considering the aesthetic appearance, and the conventional tower top hanging brackets are difficult to adapt to special-shaped cable towers that bend inward or outward.

[0003] Therefore, in view of the above deficiencies, it is necessary to provide a tower top hanging bracket for a curved cable tower. Summary of the Invention

[0004] The purpose of the utility model is to provide a tower top hanging bracket for a curved cable tower, thereby solving the problem that the existing tower top hanging brackets cannot be applied to special-shaped cable towers.

[0005] The utility model is realized as follows:

[0006] A tower top hanging bracket for a curved cable tower, characterized in that it includes steel pipe columns, truss tie rods, bases, main trusses, steering small gantry frames, winches, first pulley groups, second pulley groups, third pulley groups, upper cross-bar steel wire ropes, and lower cross-bar steel wire ropes, wherein:

[0007] Four embedded parts distributed in a rectangle are arranged on the top inclined surface of each tower body at the top of the cable tower, and a base is welded to the top of each embedded part. The top surface and the bottom surface of the base are a horizontal plane and an inclined plane respectively; four steel pipe columns are arranged on each tower body, and the bottom parts of the four steel pipe columns are vertically fixed on the top surfaces of the four bases respectively, and the tops of the four steel pipe columns are on the same horizontal plane; four truss tie rods are arranged between every two adjacent steel pipe columns in the transverse bridge direction of each group. The four truss tie rods enclose a rectangle with an intersection in the middle, and a connecting steel plate is used to weld and fix the intersection of every two truss tie rods and the steel pipe column together. The size of the rectangle enclosed by the truss tie rods is the same as the size of the rectangle enclosed by the four steel pipe columns; at the same time, two truss tie rods are arranged in a cross shape between every two adjacent steel pipe columns in the longitudinal bridge direction of each group, and a connecting steel plate is also used to weld and fix the intersection of each truss tie rod and the intersection of each truss tie rod and the steel pipe column.

[0008] At the top of each pair of longitudinally adjacent steel pipe columns, a main truss is welded. The main truss includes an upper chord, a lower chord, diagonal bars, and vertical bars, and is in an isosceles trapezoid structure as a whole. The lower chord at the bottom of the main truss is welded to the steel pipe column, and vertical bars are welded above the two connection nodes of the lower chord and the steel pipe column. The upper chord is welded at the top of the two vertical bars, and one diagonal bar is welded at each end of the upper chord and is welded to the position 50 cm inward from both ends of the lower chord to form an integral truss.

[0009] Between the lower chords of the two main trusses and between the tops of the vertical bars, multiple groups of truss connection systems are welded and connected. At one end of the truss connection system between the tops of the vertical bars, another group of truss connection systems is welded and connected to the bottom of the vertical bar at the other end to form a Z-shaped connection, thereby connecting the two main trusses into an integral whole.

[0010] On the upper surfaces of the middle parts of the lower chords of the two main trusses, multiple groups of bearing beams are provided, and two winches are symmetrically arranged above the bearing beams with the center line of the tower top hanger as the symmetry axis.

[0011] On the upper surfaces of the two end points of the lower chords of the two main trusses, a turning small gantry is vertically and symmetrically fixed respectively. Each turning small gantry consists of an upper cross bar, a lower cross bar, columns, and diagonal braces. A lower cross bar is provided in the longitudinal bridge direction of the turning small gantry, and the bottom ends of both ends of the lower cross bar are respectively fixedly connected to one end of the lower chords of the two main trusses. Two columns are welded at both ends of the lower cross bar, and an upper cross bar is welded above the two columns. Two diagonal braces are welded at the top ends of the two columns of the turning small gantry, and the bottom ends of the diagonal braces are perpendicularly welded to the diagonal bars of the main truss to ensure the structural strength of the lifting turning small gantry.

[0012] A plurality of hanging points are evenly spaced on the lower cross bar of the turning small gantry. A steel hanging rope for the lower cross bar is hung at one of the plurality of hanging points on the lower cross bar of the turning small gantry. The lower end of the steel hanging rope for the lower cross bar vertically drops and winds around the first pulley block, and then continues to extend the steel hanging rope for the lower cross bar vertically and winds around the second pulley block. A steel hanging rope for the upper cross bar is sleeved at any position on the upper cross bar of the turning small gantry, and the lower end of the steel hanging rope for the upper cross bar is obliquely connected to the hook of the third pulley block. The steel cable led out by the winch is wound and connected to the third pulley block to keep the third pulley block in a fixed posture, and then the steel cable is continuously connected to the second pulley block. By driving the winch, the steel cable is steered by the third pulley block to drive the second pulley block to move up and down, and a hook is provided below the second pulley block to hoist the stay cable and other components.

[0013] As a further description of the present invention, preferably, the outer diameter of the base is larger than the outer diameter of the steel pipe column to increase the contact area between the base and the tower body. The bottom end surface of the base is an inclined surface, and the inclined surface at the bottom of the base contacts the inclined surface of the tower body.

[0014] As a further description of the present utility model, preferably, four embedded parts are fixedly connected to the top surface of each tower body. When pouring the tower body, the bottom end of each embedded part is vertically embedded into the tower body, and the top surface is parallel to the top inclined surface of the tower body.

[0015] As a further description of the present utility model, preferably, both the main truss and the truss connection system are steel members. The main truss is longitudinally fixed on two steel pipe columns in the bridge direction. The length of the lower chord of the main truss is greater than the distance between the two steel pipe columns at the bottom, and the length of the upper chord of the main truss is equal to the distance between the two steel pipe columns at the bottom.

[0016] As a further description of the present utility model, preferably, the steel hanging rope on the upper crossbar of the upper crossbar and the steel hanging rope on the lower crossbar at the hanging point of the lower crossbar are in the same vertical plane or different vertical planes, so as to realize turning hoisting.

[0017] The present utility model has the following advantages:

[0018] 1. By designing a turning small gantry with adjustable position, the steel hanging rope on the upper crossbar of the turning small gantry is sleeved at any position on the upper crossbar, and multiple hanging points are evenly arranged on the lower crossbar. According to the installation position of the stay cable, the vertical position of the steel hanging rope on the upper crossbar of the turning small gantry and the steel hanging rope on the lower crossbar at the hanging point of the lower crossbar are adjusted, so that the third pulley block and the second pulley block have a position deviation, thereby realizing convenient transposition, without disassembling, reconstructing the entire hanger, and arranging multiple groups of hangers to increase the construction volume and the burden on the cable tower;

[0019] 2. There is no need to additionally install power such as motors and sliding components such as sliders and slide rails to move the hanging point position. While saving the design cost and construction cost of the hanger, it also avoids the hanger bearing too much weight and affecting its bearing capacity, killing two birds with one stone;

[0020] 3. By arranging the embedded parts, the connection strength between the steel pipe column and the tower body can be improved. At the same time, the special-shaped structure of the base keeps the steel pipe column vertical, improves the load-bearing capacity, and can effectively hoist components such as stay cables;

[0021] 4. Setting the diagonal bars is beneficial to improving the load-bearing and bending resistance ability of the main truss, thereby improving the structural strength of the hanger and avoiding deformation of the main truss when hoisting the stay cable;

[0022] 5. The inclined surface at the bottom of the base contacts the inclined surface of the tower body, further increasing the contact area and avoiding the appearance of contact gaps that affect the load-bearing capacity of the steel pipe column.

[0023] The present utility model can be adapted to hoist stay cables on special-shaped cable towers. Description of the Drawings

[0024] Figure 1It is the overall assembly effect drawing of the present utility model in the transverse bridge direction;

[0025] Figure 2 is Figure 1 the side view sectional view of

[0026] Figure 3 is Figure 1 the top view sectional view of

[0027] Figure 4 It is the partial structure drawing of the steering small gantry of the present utility model;

[0028] Figure 5 is Figure 4 the side view of

[0029] Figure 6 The enlarged drawing of the base connection;

[0030] In the figure: 1. Steel pipe column; 2. Truss tie rod; 21. Connecting plate; 3. Base; 31. Embedded part; 4. Main truss; 41. Truss connection system; 42. Lower chord; 43. Upper chord; 44. Vertical rod; 45. Diagonal rod; 5. Steering small gantry; 51. Diagonal brace; 52. Upper cross bar; 53. Lower cross bar; 54. Column; 55. Hoisting point; 6. Steel wire rope hanging on the lower cross bar; 7. Winch; 71. Steel cable; 72. Cushion beam; 8. First pulley block; 9. Second pulley block; 91. Hook; 10. Third pulley block; 101. Hook; 11. Tower body; 12. Steel wire rope hanging on the upper cross bar. Specific implementation manner

[0031] To make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Combined with Figure 1 -- Figure 6 A tower top hanger for a curved cable tower includes a steel pipe column 1, a truss tie rod 2, a base 3, a main truss 4, a steering small gantry 5, a winch 7, a first pulley block 8, a second pulley block 9, a third pulley block 10, a steel wire rope hanging on the lower cross bar 6 and a steel wire rope hanging on the upper cross bar 12, wherein:

[0033] At the top of each tower body 11 at the top of the pylon, four embedded parts 31 distributed in a rectangle are provided on the top inclined surface. A base 3 is welded to the top of each embedded part 31. The top surface and the bottom surface of the base 3 are a horizontal plane and an inclined plane respectively; Four steel pipe columns 1 are provided on each tower body 11. The bottom parts of the four steel pipe columns 1 are vertically fixed on the top surfaces of the four bases 3 respectively, and the tops of the four steel pipe columns 1 are on the same horizontal plane; Four truss tie rods 2 are provided between every two adjacent steel pipe columns 1 in the transverse direction of the bridge. The four truss tie rods 2 enclose a rectangle with an intersection in the middle, and a connecting steel plate 21 is used to weld and fix the intersection of every two truss tie rods 2 and the steel pipe column 1 together. The size of the rectangle enclosed by the truss tie rods 2 is the same as the size of the rectangle enclosed by the four steel pipe columns 1; At the same time, two truss tie rods 2 are arranged in a cross shape between every two adjacent steel pipe columns 1 in the longitudinal direction of the bridge. Similarly, a connecting steel plate 21 is used to weld and fix the intersection of the two truss tie rods 2 and the intersection of each truss tie rod 2 and the steel pipe column 1.

[0034] A main truss 4 is welded to the top of every two adjacent steel pipe columns 1 in the longitudinal direction of the bridge. The main truss 4 includes an upper chord 43, a lower chord 42, diagonal members 45 and vertical members 44, and is in an isosceles trapezoid structure as a whole; The lower chord 42 at the bottom of the main truss 4 is welded to the steel pipe column 1, and a vertical member 44 is welded above the two connection nodes of the lower chord 42 and the steel pipe column 1; The upper chord 43 is welded to the top of the two vertical members 44, and a diagonal member 45 is welded to each end of the upper chord 43 and is welded to the position 50 cm inward from both ends of the lower chord 42 to form an integral truss.

[0035] Multiple groups of truss connection systems 41 are welded and connected between the lower chords 42 of the two main trusses 4 and between the tops of the vertical members 44. One end of the truss connection system 41 between the tops of the vertical members 44 is welded to the bottom of the other vertical member 44 to form a Z-shaped connection, so as to connect the two main trusses 4 into an integral whole.

[0036] Multiple groups of bearing beams 72 are provided on the middle parts of the lower chords 42 of the two main trusses 4. Two hoists 7 are symmetrically arranged above the bearing beams 72 with the center line of the tower top hanger as the symmetry axis.

[0037] At both end points of the lower chord rods 42 of the two main trusses 4, a turning small gantry 5 is vertically and symmetrically fixed respectively; each turning small gantry 5 is composed of an upper cross bar 52, a lower cross bar 53, a column 54 and a diagonal brace 51; a lower cross bar 53 is arranged in the longitudinal bridge direction of the turning small gantry 5, and the bottom ends of both ends of the lower cross bar 53 are fixedly connected to one end of the lower chord rods 42 of the two main trusses 4 respectively; two columns 54 are welded at both ends of the lower cross bar 53, and an upper cross bar 52 is welded above the two columns 54; two diagonal braces 51 are welded at the top ends of the two columns 54 of the turning small gantry 5, and the bottom ends of the diagonal braces 51 are perpendicularly welded to the diagonal rods 45 of the main truss 4 to ensure the structural strength of the lifting turning small gantry 5.

[0038] A plurality of hanging points 55 are evenly spaced on the lower cross bar 53 of the turning small gantry 5; a lower cross bar steel hanging rope 6 is hung on one of the plurality of hanging points 55 of the lower cross bar 53 of the turning small gantry 5, the lower end of the lower cross bar steel hanging rope 6 vertically drops and winds around the first pulley block 8, and then the lower cross bar steel hanging rope 6 continues to be led out and vertically drops and winds around the second pulley block 9; an upper cross bar steel hanging rope 12 is sleeved at any position on the upper cross bar 52 of the turning small gantry 5, and the lower end of the upper cross bar steel hanging rope 12 is obliquely connected to the hook 101 of the third pulley block 10; the winch 7 leads out a steel cable 71 and is wound and connected to the third pulley block 10 to fix the posture of the third pulley block 10, and then the steel cable 71 is continuously connected to the second pulley block 9; by driving the winch 7, the steel cable 71 is turned by the third pulley block 10 to drive the second pulley block 9 to move up and down, and a hook 91 is arranged below the second pulley block 9 to hoist the stay cable and other components.

[0039] As a further description of the present invention, preferably, the outer diameter of the base 3 is larger than the outer diameter of the steel pipe column 1 to increase the contact area between the base 3 and the tower body 11, the bottom end surface of the base 3 is an inclined surface, and the inclined surface at the bottom of the base 3 is in contact with the inclined surface of the tower body 11.

[0040] As a further description of the present invention, preferably, four embedded parts 31 are fixedly connected to the top surface of each tower body 11, and the bottom ends of each embedded part 31 are vertically embedded into the tower body 11 during the pouring of the tower body 11 and the top surfaces are parallel to the top inclined surface of the tower body 11.

[0041] As a further description of the present invention, preferably, the main truss 4 and the truss connection system 41 are both steel members, the main truss 4 is longitudinally fixed on two steel pipe columns 1, the length of the lower chord rod 42 of the main truss 4 is greater than the distance between the two steel pipe columns 1 at the bottom, and the length of the upper chord rod 43 of the main truss is equal to the distance between the two steel pipe columns 1 at the bottom.

[0042] As a further illustration of the present utility model, preferably, the upper crossbar steel wire rope 12 of the upper crossbar 52 and the lower crossbar steel wire rope 6 at the suspension point 55 of the lower crossbar 53 are in the same vertical plane or different vertical planes, so as to realize turning hoisting.

[0043] Working principle:

[0044] 1. The winch 7 extends the steel cable 71 around the third pulley block 10 and extends downward to the second pulley block 9. By the rotation of the winch 7 and the action of gravity, the distance between the second pulley block 9 and the first pulley block 8 can be lengthened or shortened. Furthermore, the second pulley block 9 can be moved down to the bottom of the cable tower to hoist the stay cable. Then, the winch 7 pulls back the steel cable 71 to pull the second pulley block 9 to the top of the cable tower. Then, the end of the stay cable is installed on the cable tower and tightened by other equipment arranged on the cable tower to ensure that the stay cable can effectively support the bridge deck.

[0045] 2. When the position of the next stay cable to be installed is not in the same vertical plane as the current hoisting position, only by changing the position of the upper crossbar steel wire rope 12 of the steering small gantry 5 and the suspension point position of the lower crossbar 53, the position offset can be completed. There is no need to disassemble, reinstall and rebuild the entire hanger, nor to additionally install power such as a motor and sliding components such as sliding blocks and slide rails to move the suspension point 55. While saving the design cost and construction cost of the tower top hanger, it also avoids the overloading of the tower top hanger and affecting its bearing capacity, killing two birds with one stone.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A top hanger for a curved cable tower, characterized in that: It includes steel pipe columns, truss tie rods, bases, main trusses, steering small gantry frames, winches, first pulley blocks, second pulley blocks, third pulley blocks, steel wire ropes on the upper crossbar, and steel wire ropes on the lower crossbar, where: On the top inclined surface of each tower body at the top of the cable tower, there are four embedded parts distributed in a rectangle. A base is welded on the top of each embedded part. The top surface and the bottom surface of the base are a horizontal plane and an inclined plane respectively; on each tower body, there are four steel pipe columns, and the bottom parts of the four steel pipe columns are vertically fixed on the top surfaces of the four bases respectively, and the tops of the four steel pipe columns are on the same horizontal plane; One main truss is welded on the top of each two adjacent steel pipe columns in the longitudinal bridge direction; Between the lower chord rods of the two main trusses and between the tops of the vertical rods, multiple groups of truss connection systems are welded and connected. One end of the truss connection system between the tops of the vertical rods is welded with another group of truss connection systems and is welded with the bottom of the vertical rod at the other end to form a Z-shaped connection, thereby connecting the two main trusses into a whole; Multiple groups of bearing beams are arranged on the middle parts of the lower chord rods of the two main trusses, and two winches are symmetrically arranged above the bearing beams with the center line of the tower top hanger as the symmetry axis; One steering small gantry frame is vertically and symmetrically fixed on the upper parts of the two ends of the lower chord rods of the two main trusses respectively; each steering small gantry frame consists of an upper crossbar, a lower crossbar, vertical columns, and diagonal braces; in the longitudinal bridge direction of the steering small gantry frame, there is a lower crossbar, and the bottom parts of the two ends of the lower crossbar are respectively fixedly connected to one end of the lower chord rods of the two main trusses; two vertical columns are welded at the two ends of the lower crossbar, and an upper crossbar is welded above the two vertical columns; two diagonal braces are welded at the top ends of the two vertical columns of the steering small gantry frame, and the bottom ends of the diagonal braces are perpendicularly welded to the diagonal rods of the main truss to ensure the structural strength of the lifting steering small gantry frame; A plurality of hanging points are evenly spaced on the lower crossbar of the steering small gantry frame; a steel wire rope on the lower crossbar is hung on one of the plurality of hanging points on the lower crossbar of the steering small gantry frame. The lower end of the steel wire rope on the lower crossbar vertically drops and winds around the first pulley block, and then continues to lead out the steel wire rope on the lower crossbar to vertically drop and wind around the second pulley block; a steel wire rope on the upper crossbar is sleeved at any position on the upper crossbar of the steering small gantry frame, and the lower end of the steel wire rope on the upper crossbar is obliquely connected to the hook of the third pulley block; the winch leads out a steel cable and winds it around the third pulley block to fix the posture of the third pulley block, and then continues to connect the steel cable to the second pulley block; by driving the winch, the steel cable is steered by the third pulley block to drive the second pulley block to move up and down, and a hook is arranged below the second pulley block to hoist the stay cable and other components.

2. The top hanger for a curved cable tower according to claim 1, characterized in that: Four truss tie rods are provided between every two adjacent steel pipe columns in the transverse direction of each group. The four truss tie rods enclose a rectangle with an intersection in the middle, and connecting steel plates are used to weld and fix the intersection of every two truss tie rods and the steel pipe columns together. The size of the rectangle enclosed by the truss tie rods is the same as the size of the rectangle enclosed by the four steel pipe columns. At the same time, two truss tie rods are arranged in a cross pattern between every two adjacent steel pipe columns in the longitudinal direction of each group, and connecting steel plates are also used to weld and fix the intersection of each truss tie rod and the intersection of each truss tie rod and the steel pipe column.

3. The top hanger for a curved cable tower according to claim 1, characterized in that: The main truss includes an upper chord, a lower chord, diagonal members and vertical members, and the overall structure is an isosceles trapezoid. The lower chord at the bottom of the main truss is welded to the steel pipe column, and vertical members are welded above the two connection nodes of the lower chord and the steel pipe column. The upper chord is welded at the top of the two vertical members, and one diagonal member is welded at each end of the upper chord and connected to the positions 50 cm inward from both ends of the lower chord to form an integral truss.

4. The overhead suspension bracket for the tower top of the curved cable tower according to claim 1, wherein: The outer diameter of the base is larger than the outer diameter of the steel pipe column. The bottom end face of the base is an inclined plane, and the inclined plane at the bottom of the base contacts the inclined plane of the tower body.

5. The top hanger for a curved cable tower according to claim 1, characterized in that: Four embedded parts are fixedly connected to the top surface of each tower body. When pouring the tower body, the bottom end of each embedded part is vertically embedded into the tower body and the top surface is parallel to the top inclined plane of the tower body.

6. The top hanger for a curved cable tower according to claim 1, characterized in that: Both the main truss and the truss connection system are made of steel members. The main truss is longitudinally fixed on two steel pipe columns. The length of the lower chord of the main truss is greater than the distance between the two bottom steel pipe columns, and the length of the upper chord of the main truss is equal to the distance between the two bottom steel pipe columns.

7. The top hanger for a curved cable tower according to claim 1, characterized in that: The upper crossbar steel hanging rope of the upper crossbar and the lower crossbar steel hanging rope at the hanging point of the lower crossbar are in the same vertical plane or different vertical planes.

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