Cable crane traction system for suspension bridge

Abstract

The invention relates to the technical field of bridge cable hoisting, in particular to a cable crane traction system for a suspension bridge, which comprises two cable saddles respectively arranged on towers on two sides of a bridge body, a cable crane traction system arranged between the two cable saddles and a crown block arranged on the cable crane traction system, each cable saddle is rotationally connected with a set of first traction steering wheels close to the bridge body, a set of second traction steering wheels away from the bridge body and a plurality of traction transition wheels arranged on the two sides of the cable saddle respectively. The cable crane traction system comprises two traction winches arranged on the position close to the shore side of one tower and two first anchoring steering wheels arranged on the shore side of the other tower, and the two traction winches and the two first anchoring steering wheels are in one-to-one correspondence and are arranged at intervals in the width direction of the bridge body. The problems that the cabling mode of an existing cable traction system needs to be improved, and the anti-overturning capacity of a tower cannot be effectively enhanced can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge cable hoisting, and in particular to a cable hoisting traction system for a suspension bridge. Background Art

[0002] Cable crane is a commonly used hoisting equipment for bridge superstructure construction, which consists of a load-bearing system, a traction system, a lifting system, a tower, etc. With the development of my country's economy and society, my country has put forward an urgent demand for large-span bridges with larger spans and stronger bearing capacity. At the same time, it has put forward higher requirements for the hoisting span and hoisting capacity of cable cranes. The steel wire rope of the cable crane traction system repeatedly passes through the overhead crane and the steering wheels anchored at both ends to form a closed loop. At present, the maximum closed length of the steel wire rope used in the cable crane traction system is nearly 20,000 meters. The manufacture and transportation of a single 10,000-meter-level traction steel wire rope faces great difficulties. It often requires multiple steel wire ropes to be connected in series, but the interface of the steel wire rope after series connection is poor in smoothness and the safety risk increases. With the increase of the hoisting span and hoisting capacity of the cable crane, it is particularly important to optimize the routing method of the cable crane traction system and reduce the interface of the traction steel wire rope when the maximum length of the steel wire rope processing is limited.

[0003] In the existing relevant patents, there are few references to the optimized layout of the cable crane system. The most relevant one is a cable crane and its lifting and traction system used in the construction of suspension bridges (patent publication number: CN108147295A). Two sets of lifting winches are arranged on one side of the bridge body, and the two sets of lifting winches jointly pull the same traction cable. The traction cable spans both sides of the bridge body and forms a closed loop under the action of multiple sets of steering wheels, and is also connected to the sports car, which effectively improves the working efficiency and risk resistance of the traction system, solves the occurrence of the "counter-pulling" phenomenon in the traditional traction system, and at the same time, a traction system is provided for it to solve the problem of insufficient flexibility and low precision in the control of the hoisted objects.

[0004] Although the above technical solution optimizes the current traction cable winding method and effectively solves some problems existing in the traditional winding, it does not take into account the unbalanced force exerted on the tower by the sports car during the movement and lifting of cargo. Since the sports car is not always in the middle of the bridge to lift cargo, the sports car will exert dynamically changing and different component forces on the towers on both sides during the movement. If it is lifting cargo or carrying loads, it will further aggravate the force imbalance of the tower and increase the probability of the tower overturning. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a cable traction system for a suspension bridge, which is used to solve the problem that the routing method of the existing cable traction system needs to be improved and the anti-overturning ability of the tower cannot be effectively enhanced.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A cable crane traction system for a suspension bridge, comprising two saddles respectively arranged on towers on both sides of a bridge body, a cable crane traction system arranged between the two saddles, and a crane arranged on the cable crane traction system, each of the saddles is rotatably connected to a group of first traction steering wheels close to the bridge body, a group of second traction steering wheels away from the bridge body, and a plurality of traction transition wheels respectively arranged on both sides of the saddle, wherein the plurality of traction transition wheels are symmetrically arranged about the horizontal axis of the saddle along the length direction of the bridge body, the cable crane traction system comprises two traction winches arranged on the shore close to one of the towers and two first anchoring steering wheels arranged on the shore of the other tower, the two traction winches and the two first anchoring steering wheels correspond to each other and are arranged at intervals along the width direction of the bridge body, and a group of crane steering wheels are respectively arranged on the side of the crane close to each tower. ; A traction wire rope is wound around the working end of one of the traction winches, and one end of the traction wire rope passes through the traction transition wheel on the adjacent saddle and then crosses the bridge body, and continues to pass through the traction transition wheel on the corresponding saddle, and then the traction wire rope passes through a first anchoring steering wheel, a second traction steering wheel, a first traction steering wheel, and a crane steering wheel in turn, and repeats winding between the first traction steering wheel and the crane steering wheel for many times, and then passes through the adjacent first anchoring steering wheel, and then crosses the bridge body again and passes through the first traction steering wheel and the second traction steering wheel in turn, and is wound around the working end of another traction winch, and then passes through the second traction steering wheel and the first traction steering wheel in turn, and continues to repeat winding between the first traction steering wheel and the crane steering wheel for many times, and finally is fixed to the free end of the traction wire rope and connected end to end to form a closed loop; The cable crane traction system also includes two groups of second anchoring steering wheels arranged on the shore near each tower, wherein the installation position of each group of second anchoring steering wheels corresponds to the adjacent multiple second traction steering wheels, and a traction balancing wire rope wound multiple times is connected between each group of second anchoring steering wheels and the adjacent multiple second traction steering wheels.

[0007] Furthermore, each group of the second anchoring and steering wheels is divided into two rows, front and rear, along the length direction of the bridge body, and the two rows of second anchoring and steering wheels are also arranged in sequence along the width direction of the bridge body. A balancing winch is provided on the shore on one side of each tower, and the two balancing winches are arranged on the axis along the length direction of the bridge body, wherein each of the balancing winches is arranged at a row of second anchoring and steering wheels away from the tower, and the working end of the balancing winch is connected to and reels the corresponding traction balancing steel wire rope.

[0008] Furthermore, each of the saddles is on the same vertical line as the center line of the tower it matches, and each of the towers is provided with pressure sensors on both side surfaces close to the overhead crane and the traction winch, and the working end surface of each pressure sensor is in contact with the saddle, and each of the pressure sensors, balancing winch and traction winch is electrically connected to a central controller.

[0009] Furthermore, the surface of each of the saddles is connected to an angular displacement sensor for detecting changes in the verticality of the tower, and the angular displacement sensor is electrically connected to the central controller.

[0010] Furthermore, both ends of the traction steel wire rope and the traction balance steel wire rope are flexibly closed connected.

[0011] The beneficial effects of the present invention are: 1. The present invention effectively improves and optimizes the wiring method of the traditional traction wire rope by arranging the first traction steering wheel, the second traction steering wheel and the traction transition wheel on the saddle, solves the problem of the cable crane traction wire rope being too long in the prior art, which leads to the difficulty in processing and transportation, and solves the problem of the traction wire rope being short and having poor smoothness and increased safety risks due to the extension. In addition, by arranging the first anchoring steering wheel, the second anchoring steering wheel and the traction winch and other equipment, the horizontal force component of each tower can be improved and balanced at the same time, and the anti-overturning capacity of the tower can be effectively improved, thereby ultimately ensuring the safety of the construction. 2. Multiple pressure sensors are installed between the saddle and the tower, and angular displacement sensors are installed on the saddle, which can monitor and analyze the stress conditions of each tower in real time, and can control the winding of the balance winch in real time, dynamically and accurately through the central controller, which can further improve the tower's anti-overturning ability.

[0012] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a schematic diagram of the overall structure of the cable crane traction system of the present invention; Figure 2 It is an exploded schematic diagram of the cable crane traction system of the present invention; Figure 3 It is a side view of the cable saddle structure of the present invention; Figure 4A top view of the cable saddle structure of the present invention; Figure 5 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0014] The following are marked in the accompanying drawings: 1 bridge body, 2 tower, 3 saddle, 4 overhead crane, 5 first traction steering wheel, 6 second traction steering wheel, 7 traction transition wheel, 8 traction winch, 9 first anchoring steering wheel, 10 overhead crane steering wheel, 11 traction wire rope, 12 second anchoring steering wheel, 13 traction balancing wire rope, 14 balancing winch, 15 pressure sensor. DETAILED DESCRIPTION

[0015] like Figure 1 to Figure 5 As shown, A cable traction system for a suspension bridge comprises two cable saddles 3 respectively arranged on towers 2 on both sides of a bridge body 1 (for convenience of description, Figure 1The saddle 3 located on the left side is called the first saddle, and the saddle 3 located on the right side is called the second saddle), a cable crane traction system arranged between the two saddles 3, and an overhead crane 4 arranged on the cable crane traction system, each of the saddles 3 is rotatably connected to a group of first traction steering wheels 5 close to the bridge body 1 (three first traction steering wheels 5 form a group and are arranged in an array at intervals along the width direction of the bridge body 1), a group of second traction steering wheels 6 away from the bridge body 1 (three second traction steering wheels 6 form a group and are arranged in an array at intervals along the width direction of the bridge body 1), and eight traction transition wheels 7 respectively arranged on both sides of the saddle 3, wherein the eight traction transition wheels 7 are rotatably connected with the saddle 3 along the length direction of the bridge body 1. The horizontal axis is symmetrically arranged, and the horizontal plane of the traction transition wheel 7 is higher than the first traction steering wheel 5 and the second traction steering wheel 6 (the first traction steering wheel 5 and the second traction steering wheel 6 are in the same horizontal plane). The cable crane traction system includes two traction winches 8 arranged on the shore near one of the towers 2 and two first anchoring steering wheels 9 arranged on the shore of the other tower 2. The first anchoring steering wheels 9 are fixed to the ground by the combination of cast-in-place concrete and steel components. The two traction winches 8 and the two first anchoring steering wheels 9 correspond to each other and are arranged at intervals along the width direction of the bridge body 1. The crown block 4 is respectively provided with a group of crown block steering wheels 10 (four crown blocks) on one side near each tower 2. The traction winches 8 are arranged in a group of three traction transition wheels 7 and a spacing array along the width direction of the bridge body 1); a traction wire rope 11 is wound around the working end of one of the traction winches 8, and one end of the traction wire rope 11 passes through the two traction transition wheels 7 on the first saddle 3 in sequence and then crosses the bridge body 1, and continues to pass through the two traction transition wheels 7 on the same side of the second saddle 3, and then the traction wire rope 11 passes through a first anchoring steering wheel 9, and then continues to pass through the two traction transition wheels 7 adjacent to the second saddle 3 under the guidance of the first anchoring steering wheel 9, and then reciprocates between the three first traction steering wheels 5 and the four overhead crane steering wheels 10 in sequence for multiple times, and then passes through the corresponding traction transition wheels 7 and Another adjacent first anchoring steering wheel 9 then crosses the bridge body 1 again and passes through the traction transition wheel 7 on the first saddle 3 in sequence, and is wound around the working end of another traction winch 8, and then passes through the other two traction transition wheels 7 adjacent to the previous one, and then repeats the winding between the three first traction steering wheels 5 and the four overhead crane steering wheels 10 for many times, and finally is fixed with the free end of the traction wire rope 11 and connected end to end to form a closed loop; wherein each first traction steering wheel 5, overhead crane steering wheel 10 and first anchoring steering wheel 9 etc. cooperate with the traction wire rope 11 and is wound once, and there is no repeated winding. The specific arrangement of the traction wire rope 11 can be shown in the figure; The cable crane traction system also includes a group of second anchoring steering wheels 12 (four second anchoring steering wheels 12 form a group, and the second anchoring steering wheels 12 are also fixed to the ground by the cooperation of cast-in-place concrete and steel components) arranged on the shore near each tower 2, wherein the installation position of each group of second anchoring steering wheels 12 corresponds to the adjacent five second traction steering wheels 6, and a traction balancing steel wire rope 13 wound multiple times is connected between each group of second anchoring steering wheels 12 and the adjacent five second traction steering wheels 6, and the traction balancing steel wire rope 13 is also wound once on each second anchoring steering wheel 12 and the second traction steering wheel 6, and there is no repeated winding. The specific winding setting of the traction balancing steel wire rope 13 is shown in the combined figure.

[0016] For ease of display, Figure 1 , Figure 2 To simplify the schematic diagram, towers 2 are built at both ends of the bridge body 1, and a saddle 3 is fixedly connected to the top of each tower 2. Two traction winches 8 are installed near the shore of one of the towers 2. When the movement of the overhead crane 4 needs to be controlled, the two traction winches 8 are controlled to reel in the traction wire rope 11 in opposite directions respectively and simultaneously. For example, we combine Figure 1 , Figure 2As shown, when it is necessary to control the crane 4 to move toward the left tower 2, the traction winch 8 located above (for the convenience of description, the first traction winch will be used instead later) is controlled to wind up the traction wire rope 11 in a clockwise direction, while the traction winch 8 located below (for the convenience of description, the second traction winch will be used instead later) is controlled to wind up the wire rope counterclockwise, and the two traction winches 8 move simultaneously and drag the crane steering wheel 10 on the left side of the crane 4. Of course, if it is necessary to control the crane 4 to move in the opposite direction, it is only necessary to control the first traction winch and the second traction winch to move in the opposite directions mentioned above, which can effectively reduce the length and number of joints of the traction wire rope 11, improve the smoothness of the connection between the traction wire rope 11 and each steering wheel, and reduce the occurrence of safety accidents; a second anchoring steering wheel is also provided on the side close to the shore of each tower 2. Wheel 12, the corresponding four second anchoring steering wheels 12 and five second traction steering wheels 6 are wound and connected by the traction balancing wire rope 13, which can effectively enhance the anti-overturning ability of each tower 2. Since the load-bearing rope, traction rope and lifting rope are all guided and load-bearing through the saddle 3 (the connection method between the load-bearing rope, traction rope and lifting rope and the saddle 3 is all existing technology, no need to elaborate), and the tower 2 mainly bears vertical loads and has limited lateral load bearing. When the overhead crane 4 hoists the cargo and moves between the two towers 2, the overhead crane 4 and the cargo apply dynamic horizontal components to the saddle 3 through the load-bearing rope and traction rope, and the traction balancing wire rope 13 can effectively enhance the stability of the tower 2 in the horizontal direction through the saddle 3, and can effectively resist the horizontal component of force applied by the overhead crane 4 and the cargo to the tower 2, thereby improving the force balance of the saddle 3 and the tower 2.

[0017] In this embodiment, each group of the second anchoring steering wheels 12 is divided into two rows along the length direction of the bridge body 1, and the two rows of second anchoring steering wheels 12 are also evenly spaced along the width direction of the bridge body 1 (the specific arrangement of each group of second anchoring steering wheels 12 is shown in the figure), and a balancing winch 14 is provided on the shore on one side of each tower 2 (the balancing winch 14 is also anchored to the ground with the steel structure through cast-in-place concrete), and the two balancing winches 14 are arranged on the axis along the length direction of the bridge body 1, wherein each balancing winch 14 is arranged at a row of second anchoring steering wheels 12 away from the tower 2 and is located between the two second anchoring steering wheels 12, and the two ends of each traction balancing steel wire rope 13 are connected to the working end of the balancing winder after passing through the corresponding second anchoring steering wheel 12 and the second traction steering wheel 6 respectively, and the working end of the balancing winch 14 will simultaneously wind up the corresponding two ends of the traction balancing steel wire rope 13 when it rotates.

[0018] The balancing winch 14 is provided to be able to simultaneously reel in the two ends of the traction balancing wire rope 13, and while the traction wire rope 11 is being reeled in, it will apply a pulling force to the corresponding four second anchoring steering wheels 12 and three second traction steering wheels 6, and apply a horizontal component of force to the corresponding saddle 3 and tower 2, so as to balance the horizontal component of force applied to the saddle 3 and tower 2 by the overhead crane 4 when hoisting goods and during the movement of the overhead crane 4, and can effectively reduce the unbalanced horizontal component of force applied to the saddle 3 and tower 2, and thereby reduce the overturning probability of the tower 2; after the construction of the tower 2, the saddle 3 and the corresponding cables is completed, the load-bearing rope and the traction rope need to be tightened to a preset verticality, and the second traction steering wheel 6 and the second anchoring steering wheel 12 are fixed to the horizontal component of force applied to the saddle 3 and tower 2 by the overhead crane 4 when hoisting goods and during the movement of the overhead crane 4. The traction balancing steel wire rope 13 also needs to be tightened. At this time, the two saddles 3 and the tower 2 are only subjected to the horizontal force component applied by the overhead crane 4 and each cable. This part of the horizontal force component is balanced by the cooperation of the traction balancing steel wire rope 13 and the second anchoring steering wheel 12 and the second traction steering wheel 6, thereby ensuring the force balance and anti-overturning ability of the tower 2; when the overhead crane 4 hoists the goods and moves driven by the traction rope, the force balance of the two towers 2 will be broken at this time, which will increase the overturning probability of the tower 2 in the long run. Therefore, by controlling the balancing winch 14 to reel in the corresponding traction balancing steel wire rope 13, making it taut and applying an appropriate horizontal force component to the tower 2, the horizontal force component in the opposite direction and the horizontal force component applied by the overhead crane 4 when hoisting the goods offset each other, thereby achieving the effect of force balance of the tower 2.

[0019] In this embodiment, each of the saddles 3 is on the same vertical line as the center line of the tower 2 corresponding thereto, the first traction steering wheel 5, the second traction steering wheel 6 and the traction transition wheel 7 are symmetrically arranged about the center line of the saddle 3, the surface of the tower 2 is fixedly connected by bolts with a limit block for limiting the movement of the saddle 3 along the width direction of the bridge body 1, and each of the towers 2 is fixed with a pressure sensor 15 on both side surfaces close to the overhead crane 4 and the traction winch 8, and the working end surface of each pressure sensor 15 is in contact with the saddle 3, and each of the pressure sensors 15, the balancing winch 14 and the traction winch 8 are electrically connected to a central controller (the central controller is not shown in the figure, and a smart computer or a single-chip microcomputer or other device may be used).

[0020] As shown in the figure, after the saddle 3 and the tower 2 are spliced ​​together, the saddle 3 is fixed in the current position by a limit block (the specific implementation method is the existing technology and will not be described in detail). Of course, a gap is left between the saddle 3 and the tower 2 for the installation of the pressure sensor 15. The pressure sensors 15 on both sides of each saddle 3 can detect the horizontal component of force exerted on the saddle 3 in real time. When the traction wire rope 11, the overhead crane 4, the hoisted goods and other construction equipment exert dynamic horizontal components on the saddle 3, the two corresponding pressure sensors 15 on each saddle 3 can feedback their force conditions in real time. Subsequently, the central controller processes the data and dynamically controls the balancing winch 14 to reel in the traction balancing wire rope 13, thereby achieving the purpose of force balance between the saddle 3 and the tower 2, and can more accurately and quickly adjust the force balance of the saddle 3 and the tower 2, effectively improving the anti-overturning ability of the tower 2.

[0021] In this embodiment, the surface of each of the saddles 3 is connected to an angular displacement sensor (not shown in the figure) for detecting changes in the verticality of the tower 2. The angular displacement sensor is electrically connected to the central controller. The angular displacement sensor can detect in real time the changes in the tower 2 after being subjected to force (the deflection of the vertical line after the saddle 3 is connected to the bottom of the tower 2), which complements the pressure sensor 15, can collect more information and then accurately adjust the force condition of the tower 2, and improve the anti-overturning ability of the tower 2.

[0022] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A cable traction system for a suspension bridge, comprising two saddles (3) respectively arranged on towers (2) on both sides of a bridge body (1), a cable traction system arranged between the two saddles (3), and a crane (4) arranged in the cable traction system, characterized in that: Each of the cable saddles (3) is rotatably connected to a group of first traction steering wheels (5) close to the bridge body (1), a group of second traction steering wheels (6) away from the bridge body (1), and a plurality of traction transition wheels (7) respectively arranged on both sides of the cable saddle (3), wherein the plurality of traction transition wheels (7) are symmetrically arranged about the horizontal axis of the cable saddle (3) along the length direction of the bridge body (1). The cable crane traction system comprises two traction winches (8) arranged on the shore close to one of the towers (2) and two first anchoring steering wheels (9) arranged on the shore of the other tower (2), the two traction winches (8) and the two first anchoring steering wheels (9) corresponding to each other and arranged at intervals along the width direction of the bridge body (1), and a group of crown crane steering wheels (10) are respectively arranged on one side of the crown crane (4) close to each tower (2); a traction wire rope (11) is wound around the working end of one of the traction winches (8), and one side of the traction wire rope (11) is wound around the working end of the traction winches (8). The end of the traction wire rope (11) passes through the traction transition wheel (7) on the adjacent saddle (3) and then crosses the bridge body (1), and continues to pass through the traction transition wheel (7) on the corresponding saddle (3), and then the traction wire rope (11) passes through a first anchoring steering wheel (9), a second traction steering wheel (6), a first traction steering wheel (5), and a crane steering wheel (10) in sequence, and repeatedly winds between the first traction steering wheel (5) and the crane steering wheel (10) for multiple times, and then passes through the adjacent first anchoring steering wheel (9), and then crosses the bridge body (1) again and passes through the first traction steering wheel (5) and the second traction steering wheel (6) in sequence, and is wound around the working end of another traction winch (8), and then passes through the second traction steering wheel (6) and the first traction steering wheel (5) in sequence, and continues to repeat winding between the first traction steering wheel (5) and the crane steering wheel (10) for multiple times, and finally is fixed to the free end of the traction wire rope (11) and connected end to end to form a closed loop; The cable crane traction system further comprises two groups of second anchoring steering wheels (12) arranged on the shore near each tower (2), wherein the installation position of each group of second anchoring steering wheels (12) corresponds to the adjacent plurality of second traction steering wheels (6), and a traction balancing steel wire rope (13) wound multiple times is connected between each group of second anchoring steering wheels (12) and the adjacent plurality of second traction steering wheels (6).

2. The cable traction system for a suspension bridge according to claim 1, characterized in that: Each group of the second anchoring steering wheels (12) is divided into two rows along the length direction of the bridge body (1), and the two rows of second anchoring steering wheels (12) are also arranged in sequence along the width direction of the bridge body (1). A balancing winch (14) is provided on the shore of one side of each tower (2), and the two balancing winches (14) are arranged on the axis along the length direction of the bridge body (1), wherein each balancing winch (14) is arranged at a row of second anchoring steering wheels (12) away from the tower (2), and the working end of the balancing winch (14) is connected to and reels the corresponding traction balancing steel wire rope (13).

3. The cable suspension traction system for a suspension bridge according to claim 2, characterized in that: Each of the saddles (3) and the center line of the tower (2) matched therewith are on the same vertical line, and each of the towers (2) is provided with pressure sensors (15) on both side surfaces close to the overhead travelling crane (4) and the traction winch (8), and the working end surface of each pressure sensor (15) is in contact with the saddle (3), and each of the pressure sensors (15), the balancing winch (14) and the traction winch (8) are electrically connected to a central controller.

4. The cable suspension traction system for a suspension bridge according to claim 3, characterized in that: The surface of each of the saddles (3) is connected to an angular displacement sensor for detecting changes in the verticality of the tower (2), and the angular displacement sensor is electrically connected to the central controller.

5. The cable suspension traction system for a suspension bridge according to claim 4, characterized in that: Both ends of the traction steel wire rope (11) and the traction balance steel wire rope (13) are flexibly closed connected.

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