Traction rope guide device

Abstract

The invention relates to the technical field of suspension bridge construction, in particular to a traction rope guide device which comprises a plurality of guide wheel sets installed on a main tower portal of a cable bridge, a traction rope can penetrate through the guide wheel sets, the number of the guide wheel sets is multiple, and the guide wheel sets are arranged in the direction of the traction rope at intervals. The guide wheel set comprises a mounting frame and a plurality of guide wheels, the mounting frame is parallel to the traction rope and is vertically arranged, and the guide wheels are distributed on the surface of the mounting frame at intervals in the extension direction of the traction rope. According to the scheme, the problem that an existing traction rope is twisted when an approach bridge road section is an arc-shaped section, so that a guide wheel set cannot be completely attached to the traction rope, and the traction rope is derailed can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of suspension bridge construction, and in particular to a traction rope guide device. Background Art

[0002] Suspension bridges have become an ideal choice for building bridges across mountains, rivers, and even seas due to their excellent spanning performance. In this type of bridge structure, cables or chains play the role of the main load-bearing components. When installing these key suspension cables, the traction system is an indispensable equipment for the main cable erection work.

[0003] At present, the traction system of the main cable adopts a large-circulation traction system, which is composed of a winch, a traction rope, two sets of pullers, a guide wheel group and a counterweight frame. The guide wheel is movably arranged on the top of the cable tower gantry. The guide wheels of the guide wheel group are arranged in sequence in an upwardly protruding arc shape. The side wall of the outer edge of the guide wheel is surrounded by a ring groove for the traction rope to be buckled into. Before installing the suspension cable, the staff will put the traction rope on the guide wheel group in advance, and the traction rope will be buckled into the ring grooves of several guide wheels of the guide wheel group in sequence. The guide wheel group supports the traction rope. The pullers are all set on the traction rope. The pullers pull the rope strands from the rope-laying area to the pullers on the opposite bank, and then pull the rope strands from the opposite bank to the rope-laying area, and the operation is repeated in a cycle to realize the hoisting and transportation of the rope strands.

[0004] In actual application, the bracket for installing the guide wheel group is usually fixed on the top wall of the cable tower gantry. However, in the actual process of assembling the traction rope and the guide wheel, due to the uncertainty of the height of the cable tower gantry, the distance between the fixed end of the traction rope and the cable tower gantry, and the obstacles on the traction rope path, the traction ropes at different bridges or even at both ends of the same bridge may bypass the guide wheel group from different directions or at different angles. Figure 1 , 2 As shown in the figure, when the approach sections at both ends of the bridge are not a straight line but have an arc, the traction rope needs to avoid the curved section during the traction operation. The traction rope extends to the anchor through the guide rope device of the tower top gantry. Since the approach bridge has a large curve, the traction rope must be twisted to avoid the approach bridge, which makes the traction rope easy to derail. Therefore, if the guide wheel group parallel to the bridge section in the existing technology is still used for traction, the traction rope and the guide wheel group will have a certain angle, and there is a possibility that the guide wheel on the guide wheel group is unevenly stressed, which is easy to cause a safety accident of cable jumping and derailment. The most important thing is that the approach bridge has a large amplitude and one side is against the mountain. The traction rope can only deflect to the other side, and the deflection angle is large, which is easy to jump out. Therefore, our company proposes a new traction rope guide device. Summary of the invention

[0005] The present invention provides a traction rope guide device to solve the problem that the existing traction rope will be twisted when the approach bridge section is an arc section, resulting in the guide wheel group being unable to completely fit the traction rope, causing the traction rope to derail.

[0006] In order to solve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a traction rope guiding device, including a guide wheel group installed on the main tower gantry of the cable bridge, the guide wheel group is used for allowing the traction rope to pass through it, the number of guide wheel groups is several, and the several guide wheel groups are arranged at intervals along the direction of the traction rope. The guide wheel group includes a mounting frame and several guide wheels. The mounting frame is parallel to the traction rope and is vertically arranged, and the guide wheels are distributed on the surface of the mounting frame at intervals along the extension direction of the traction rope.

[0007] The basic principle of this scheme is: the guide wheel groups are respectively installed on the front and rear ends of the cable tower portal frame, and a group of guide wheel groups is installed at the end close to the approach bridge. Since the traction rope at this location needs to avoid the curvature of the approach bridge and twist, the traction rope at this end is inclined outward relative to the bridge deck of the middle bridge body. The guide wheel group is set according to the curvature of the twisted traction rope. When the traction rope enters the guide wheel group from the end close to the approach bridge, the traction rope enters the second guide wheel group. The direction of the second guide wheel group is parallel to the direction of the bridge body in the middle of the cable tower, so that the adaptation of the traction rope direction is completed by using two groups of guide wheel groups.

[0008] The beneficial effect of this solution is that the existing traction rope will twist when the approach bridge section is an arc section, which will cause the guide wheel group to be unable to fully fit the traction rope, making the traction rope easy to derail. The guide wheel group in this solution is arranged along the traction rope according to the twisting direction of the traction rope, thereby ensuring that the traction rope can fit with the guide wheel group even if it twists, thereby preventing safety problems in rope skipping.

[0009] Furthermore, an anti-rope skipping structure is provided on the mounting frame, and the anti-rope skipping structure includes a plurality of guide wheels fixed above the traction rope, and the upper and lower sides of the traction rope can be respectively attached to the guide wheels through the anti-rope skipping structure.

[0010] Furthermore, an anti-slip rope structure is provided on the mounting frame, and the anti-slip rope structure includes a bracket, a first rotating shaft, and a second rotating shaft. There are two brackets and they are symmetrically installed at both ends of the mounting frame. The first rotating shaft and the second rotating shaft are spaced apart from top to bottom along the bracket. A receiving plate is hinged on the first rotating shaft, and a passive plate is hinged on the second rotating shaft. A surface of the passive plate away from the receiving plate is provided with limiting grooves that penetrate through the side walls of both ends of the passive plate. The limiting grooves are arc-shaped grooves. Limiting clips are respectively fixed on one end of the receiving plate close to the passive plate on both sides of the receiving plate. The end of the limiting clip away from the receiving plate is connected by a crossbeam. The crossbeam passes through the limiting groove and can slide up and down in the limiting groove.

[0011] A spring is connected between the mounting frame and the side wall of the passive plate.

[0012] Furthermore, one end of the limiting clamp close to the receiving plate is in a trapezoidal shape, and a downwardly concave arc surface is provided on the upper surface of the limiting clamp.

[0013] Furthermore, there are two guide wheel groups, which are respectively fixed at the front and rear ends of the cable tower portal frame.

[0014] Furthermore, a ring groove is provided on the surface of the guide wheel for limiting the traction rope and fitting the circumferential surface of the traction rope.

[0015] Furthermore, the diameter of the traction rope is 42-45 mm.

[0016] Furthermore, the nominal tensile strength of the traction rope is 1770MPa to 1800MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a side view of the suspension bridge of the present invention;

[0018] Figure 2 A top view of the suspension bridge of the present invention;

[0019] Figure 3 It is a schematic diagram of the present invention;

[0020] Figure 4 is a top view of embodiment 1 of the present invention;

[0021] Figure 5 This is a front view of Embodiment 2 of the present invention;

[0022] Figure 6 It is a side view of embodiment 2 of the present invention;

[0023] Figure 7 It is a front view of embodiment 3 of the present invention;

[0024] Figure 8 A top view of two guide wheel groups in Example 3 of the present invention;

[0025] Fig. 9 It is a cross-sectional view of the hydraulic cylinder in Example 3 of the present invention. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: main tower of cable bridge 1, gantry 2, guide wheel group 3, guide wheel 31, mounting frame 32, bracket 5, first rotating shaft 61, second rotating shaft 62, receiving plate 7, limit clamp 71, passive plate 8, groove 81, limit groove 82, spring 9, traction rope 10, hydraulic cylinder 11, piston 111, hydraulic oil 112, switch valve 113, third rotating shaft 12, horizontal guide wheel 13, speed sensor 14.

[0028] Embodiment 1:

[0029] Embodiment 1 is basically as attached Figure 1 To Attachment Figure 4 As shown:

[0030] The traction rope guide device is installed on the upper end of the portal frame 2 on the top of the main tower 1 of the cable bridge, and includes two sets of guide wheel groups 3. The guide wheel group 3 includes a plurality of guide wheels 31 and a mounting frame 32. The mounting frame 32 is a vertical panel. The guide wheels 31 are located on the inner surface of the mounting frame 32 and are arranged in sequence along the length of the mounting frame 32. The rotating shaft of the guide wheel 31 is perpendicular to the surface of the mounting frame 32. An inwardly recessed annular groove is opened on the circumferential surface of the guide wheel 31, and the annular groove is used to clamp the traction rope 10.

[0031] Among them, a guide wheel 31 is arranged parallel to each other above the guide wheels 31 located at both ends of the mounting frame 32, and the annular grooves on the circumferential surfaces of the upper and lower guide wheels 31 are both fitted on the outer wall of the traction rope 10, thereby limiting the upper and lower positions of the traction rope 10 at the same time to prevent the traction rope 10 from jumping.

[0032] like Figure 4 As shown, the two sets of guide wheel groups 3 of this embodiment are installed on different vertical planes along the extension direction of the traction rope 10, specifically, they are installed at the front and rear ends of the gantry 2 of the main tower 1 of the cable bridge. Among the two sets of guide wheels 31, there is a certain angle between the plane where the set of guide wheels 31 close to the bridge end approach bridge and the plane where the middle of the bridge is located, and the plane where the set of guide wheels 31 far from the bridge end approach bridge is parallel to the plane where the middle of the bridge is located, so that the front section and the rear section of the twisted traction rope 10 are guided respectively by the guide wheel groups 3 on different planes, avoiding the problem of rope skipping caused by the twisting of the traction rope 10 due to only one set of guide wheels 31.

[0033] The specific implementation process is as follows:

[0034] The traction rope 10 extends from the anchor at the approach bridge to the main tower portal 2. Since the approach bridge has a large curvature, the traction rope 10 needs to be tilted and twisted outward to avoid the curved approach bridge. The traction rope 10 passes through a first set of guide wheel groups 3 parallel to its twisting angle. The front section of the traction rope 10 close to the approach bridge is guided and limited by the first guide wheel group 3, and then extends to the second guide wheel group 3. The second guide wheel group 3 is parallel to the angle of the middle section of the bridge deck between the two main towers of the suspension bridge. After the traction rope 10 passes through the second guide wheel group 3, it can be extended along the middle section of the bridge deck in a straight line to the main tower on the opposite bank. When reaching the main tower on the opposite bank, one or two sets of guide wheel groups 3 with different angles are set according to the approach bridge condition behind the main tower on the opposite bank, so as to ensure that the traction rope 10 starts to work normally in the circulating traction system.

[0035] Embodiment 2:

[0036] Embodiment 2 is basically as attached Figure 5 To Attachment Figure 6 As shown:

[0037] The difference between this embodiment and embodiment 1 is that the anti-rope skipping structure of this embodiment is different. This embodiment is carried out on the basis of the scheme of embodiment 1, and the scheme of embodiment 1 is not repeated here.

[0038] The specific anti-rope skipping structure includes a bracket 5, a first rotating shaft 61, and a second rotating shaft 62. There are two brackets 5 and they are symmetrically fixed at both ends of the guide wheel group 3 mounting frame 32. The first rotating shaft 61 and the second rotating shaft 62 are horizontally arranged from top to bottom along the bracket 5.

[0039] The first rotating shaft 61 is hinged with a receiving plate 7, and a "door"-shaped limiting clamp 71 is fixed on the movable end of the receiving plate 7. The limiting clamps 71 are symmetrically arranged at both ends of the receiving plate 7, and the end of the limiting clamp 71 fixed on the receiving plate 7 is in a trapezoidal shape. The ends of the two limiting clamps 71 away from the receiving plate 7 are fixed as a whole through a crossbeam, and the crossbeam is a cylindrical section. A concave arc surface is opened on the upper surface of the trapezoidal shape of the limiting clamp 71, and the traction rope 10 can be more closely fitted through the arc surface.

[0040] A passive plate 8 is hinged on the second rotating shaft 62. An arc-shaped limiting groove 82 that runs through both ends of the passive plate 8 is opened on the side of the passive plate 8 away from the receiving plate 7. The arc-shaped limiting groove 82 allows the cylindrical section of the limiting clamp 71 to slide up and down. A groove 81 is opened on the surface of the passive plate 8 on the side close to the receiving plate 7. The groove 81 can prevent the movable end of the receiving plate 7 from touching the passive plate 8 when rotating.

[0041] Springs 9 are connected between the side brackets 5 on the side walls of the passive plate 8 , and the springs 9 are compression springs.

[0042] The specific implementation process is as follows:

[0043] When the traction rope 10 jumps and escapes from the annular groove of the original guide wheel 31, the traction rope 10 will slide outward and fall on the surface of the receiving plate 7. At the same time, the traction rope 10 presses down the movable end of the receiving plate 7 and drives the cylindrical section of the limit clamp 71 to slide from top to bottom in the limit groove 82. When the cylindrical section slides downward, it presses the passive plate 8 to rotate downward along the second rotating shaft 62. At this time, the spring 9 stretches, and the cable falls into the arc surface of the limit clamp 71. The junction between the limit clamp 71 and the passive plate 8 can be used to move the bottom and side of the cable. The limit is used to prevent the cable from falling completely to the top platform of the cable tower. When the staff needs to install the cable back into the guide wheel group again, they only need to push the movable end of the passive plate 8, and under the action of the contraction of the spring 9, the passive plate 8 is driven to rotate upward and close to the surface of the guide wheel 31, thereby driving the limit clamp 71 to slide upward along the limit groove 82, so that the receiving plate 7 rotates upward and pushes the cable upward at the same time. The cable slides along the surface of the receiving plate 7 back into the annular groove of the guide wheel 31, and the abnormal derailment of the skipping rope can be directly handled.

[0044] Embodiment 3:

[0045] Embodiment 3 is basically as attached Figure 7 To Attachment Fig. 9 As shown:

[0046] The difference between this embodiment and embodiments 1 and 2 is that the mounting frame 32 of the guide wheel group 3 in this embodiment can rotate along the vertical axis, and the rotation range can be freely adjusted.

[0047] Specifically, in this embodiment, a third rotating shaft 12 is installed at the end of the mounting frame 32, and the third rotating shaft 12 vertically passes through the mounting frame 32 and is fixed on the gantry 2 of the main tower. A notch is opened on the side wall of the mounting frame 32, so that the horizontal guide wheel 13 can be horizontally placed in the notch, and the middle part of the third rotating shaft 12 passes through the center axis of the horizontal guide wheel 13. The side wall of the horizontal guide wheel 13 is flush with the side wall of the guide wheel 31, so that the traction rope 10 passing through the guide wheel 31 can be in contact with the side circumferential wall of the horizontal guide wheel 13 at the same time.

[0048] A horizontal hydraulic cylinder 11 is hinged between the back side of the mounting frame 32 and the gantry 2. One end of the hydraulic cylinder 11 is hinged on the gantry 2 of the main tower, and the output end of the hydraulic cylinder 11 is hinged on the back side of the mounting frame 32. The specific structure of the hydraulic cylinder 11 is shown in the attached figure. Fig. 9As shown, a piston 111 is sealed and slidably connected to the inner wall of the hydraulic cylinder 11. The piston 111 divides the inner cavity of the hydraulic cylinder 11 into two chambers. The inner cavity of the hydraulic cylinder 11 is filled with hydraulic oil 112. The hydraulic oil 112 can be added through the oil hole on the outer wall of the hydraulic cylinder 11. A through hole is opened on the piston 111, and the two ends of the through hole are connected to the two chambers respectively. A switch valve 113 is installed in the through hole, and the switch valve 113 is electrically connected to the external controller. When the switch valve is turned on, the diameter of the conduction hole is 3-5mm, so as to control the flow of hydraulic oil in the two chambers within a smaller range; the diameter and length of the chamber are 8-15 times of the conduction hole.

[0049] A speed sensor 14 is installed beside the guide wheel 31 to detect whether the guide wheel 31 rotates. Specifically, the speed sensor 14 can be a Hall-type speed sensor 14. A magnet is eccentrically installed on the axle of the guide wheel 31. When the traction rope 10 passes through and pulls the guide wheel 31, the guide wheel 31 rotates, and the magnet on the axis of the guide wheel 31 cuts the magnetic field on the Hall-type speed sensor 14. The magnitude of the generated current detects the rotation of the guide wheel group 3. In order to increase the detection accuracy and save costs, the speed sensor 14 can be set only on the guide wheels 31 at both ends of a guide wheel group 3, so as to know that the traction rope 10 enters the guide wheel 31 and moves to cover all the guide wheels 31.

[0050] The speed sensor 14 is electrically connected to the controller, and the controller is used to control the opening and closing of the switch valve 113 according to the rotation data of the guide wheel 31 obtained by the speed sensor 14. When the guide wheel 31 rotates, the switch valve 113 opens, the two chambers in the hydraulic cylinder 11 are connected, and the hydraulic oil 112 can flow freely in the two chambers through the through hole, so that the piston 111 can slide freely in the hydraulic cylinder 11; when the guide wheel 31 rotates, the circulating rope moves on the guide wheel, the switch valve 113 opens, and the hydraulic oil in the two chambers can flow at a smaller flow rate, so that the mounting frame 32 swings slightly according to the vibration of the circulating rope during the operation of the circulating rope, so that the guide wheel is in a position adapted to the circulating rope to prevent the circulating rope from derailing.

[0051] When the guide wheel 31 stops rotating, the switch valve 113 is closed, the through holes of the two chambers in the hydraulic cylinder 11 are closed, and the piston 111 is fixed by the hydraulic oil 112 in the two chambers. Therefore, when there is no traction rope 10 sliding on the guide wheel 31, the entire guide wheel group 3 can be firmly fixed on the door frame 2 without deflection along the third rotating axis 12.

[0052] This embodiment is the same as Embodiments 1 and 2, and also a set of guide wheel groups 3 are respectively arranged on the front and rear sides of the main tower. Figure 8 shown.

[0053] The specific implementation process is as follows:

[0054] When there is no traction rope 10 passing through the guide wheel group 3, the speed sensor 14 on the guide wheel group 3 detects that the guide wheel 31 does not rotate, and the switch valve 113 in the hydraulic cylinder 11 is always in a closed state, so the piston 111 does not slide, and the guide wheel group 3 remains stationary and is installed on the gantry 2.

[0055] When the traction rope 10 passes through the guide wheel group 3, the guide wheel 31 on the guide wheel group 3 rotates. After the speed sensor 14 detects that the guide wheel 31 rotates, the controller controls the switch valve 113 in the hydraulic cylinder 11 to open, and the switch valve 113 is continuously opened, so that the hydraulic oil 112 in the hydraulic cylinder 11 can flow freely on both sides of the piston 111, thereby driving the piston 111 to slide freely in the entire hydraulic cylinder 11. When the traction rope 10 deflects to one side due to the approach bridge section, the traction rope 10 can drive the mounting frame 32 to rotate along the third rotating shaft 12 by contacting the horizontal guide wheel 13, so that the entire guide wheel group 3 can freely adapt to the deflection amplitude of the traction rope 10, ensuring that the traction rope 10 always slides on the guide wheel group 3, and can adapt to the shaking of the traction rope 10 during the pulling process through the free sliding of the piston 111 in the hydraulic oil 112 cylinder to avoid the occurrence of jumping. The above is only an embodiment of the present invention, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A traction rope guide device, comprising a guide wheel assembly mounted on the main tower gantry of a cable bridge, the guide wheel assembly being used for the traction rope to pass through, characterized in that: There are several guide wheel groups, which are arranged at intervals along the direction of the traction rope. The guide wheel groups include a mounting frame and several guide wheels. The mounting frame is parallel to the traction rope and vertically arranged, and the guide wheels are distributed on the surface of the mounting frame at intervals along the extension direction of the traction rope.

2. The traction rope guide device according to claim 1, characterized in that: The mounting frame is provided with an anti-rope skipping structure, which includes a plurality of guide wheels fixed above the traction rope. The upper and lower sides of the traction rope can be respectively pressed against the guide wheels through the anti-rope skipping structure.

3. The traction rope guide device according to claim 1, characterized in that: The mounting frame is provided with an anti-rope-slipping structure, which includes a bracket, a first rotating shaft, and a second rotating shaft. There are two brackets and they are symmetrically mounted at both ends of the mounting frame. The first rotating shaft and the second rotating shaft are spaced apart from top to bottom along the bracket. A receiving plate is hinged on the first rotating shaft, and a passive plate is hinged on the second rotating shaft. A surface of the passive plate away from the receiving plate is provided with limiting grooves that penetrate through the side walls of both ends of the passive plate. The limiting grooves are arc-shaped grooves. Limiting clips are respectively fixed at one end of the receiving plate close to the passive plate on both sides of the receiving plate. The end of the limiting clip away from the receiving plate is connected by a crossbeam. The crossbeam passes through the limiting groove and can slide up and down in the limiting groove. A spring is connected between the mounting frame and the side wall of the passive plate.

4. The traction rope guide device according to claim 3, characterized in that: The end of the limiting clamp close to the receiving plate is in a trapezoidal shape, and an arc surface concave downwards is formed on the upper surface of the limiting clamp.

5. The traction rope guide device according to claim 4, characterized in that: There are two guide wheel groups, which are respectively fixed at the front and rear ends of the cable tower gantry.

6. The traction rope guide device according to claim 5, characterized in that: The surface of the guide wheel is provided with an annular groove for limiting the traction rope and fitting the circumferential surface of the traction rope.

7. The traction rope guide device according to claim 6, characterized in that: The diameter of the traction rope is 42-45 mm.

8. The traction rope guide device according to claim 7, characterized in that: The nominal tensile strength of the traction rope is 1770MPa to 1800MPa.

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