Traction rope guide device

Abstract

This application relates to the field of suspension bridge construction technology, specifically disclosing a traction rope guiding device. The device includes guide wheel assemblies mounted on the main tower gantry of the suspension bridge. These guide wheel assemblies allow the traction rope to pass through them. Several guide wheel assemblies are spaced apart along the direction of the traction rope. Each guide wheel assembly includes a mounting frame and several guide wheels. The mounting frame is parallel to the traction rope and vertically positioned. The guide wheels are spaced apart on the surface of the mounting frame along the extension direction of the traction rope. This solution solves the problem that existing traction ropes twist when the approach bridge section is curved, causing the guide wheel assemblies to fail to fully engage with the traction rope, resulting in derailment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of suspension bridge construction, in particular to a traction rope guide device. BACKGROUND

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

[0003] The current main cable traction system adopts a large circulation traction system, which is composed of a winch, a traction rope, two groups of pullers, a guide wheel set and a counterweight frame, etc. The guide wheel is movably arranged on the top of the tower portal, and the guide wheels of the guide wheel set are arranged in sequence in the form of an upward convex circular arc, and the side wall on the outer edge of the guide wheels is provided with a ring groove for buckling the traction rope. Before installing the suspension, the staff pre-buckle the traction rope on the guide wheel set, and the traction rope is buckled into the ring grooves of the guide wheels of the guide wheel set in sequence, and the guide wheel set supports the traction rope. The pullers are arranged on the traction rope, and the pullers pull the cable from the cable laying area to the puller on the opposite side, and then pull the cable from the opposite side to the cable laying area, and the operation is repeated in a loop to realize the hoisting and transportation of the cable.

[0004] In actual application, the support for installing the guide wheel set is usually fixedly arranged on the top wall of the tower portal. However, in the actual assembly process of the traction rope and the guide wheel set, due to the height of the tower portal, as well as the distance between the fixed end of the traction rope and the tower portal and the obstacles on the path of the traction rope are uncertain, the traction ropes at both ends of different bridges or even the same bridge may pass around the guide wheel set from different directions or at different angles. As shown in Figure 1 , 2 When the approach road sections at both ends of the bridge are not a straight line but have an arc, the traction rope needs to avoid the arc-shaped road section during the traction operation, and the traction cable extends to the anchor through the guide device of the tower portal. Due to the large bend of the approach bridge, the traction rope twists to avoid the approach bridge, which easily causes the traction rope to derail. Therefore, if the traction work is still performed by the guide wheel set parallel to the bridge section in the prior art, the traction rope and the guide wheel set will form a certain angle, which may cause the guide wheels on the guide wheel set to be unevenly stressed, and safety accidents such as cable jumping and derailing may occur. The most important thing is that the approach bridge has a large amplitude, one side leans against the mountain, and the traction cable can only deflect to the other side, and the deflection angle is large, which easily causes the jumping and derailing phenomenon. Therefore, our company proposes a new traction rope guide device. SUMMARY

[0005] The present application provides a traction rope guide device to solve the problem that the existing traction rope twists when the approach bridge section is an arc section, causing the guide wheel set to not completely fit the traction rope, and the traction rope to derail.

[0006] To solve the above problems, the present application adopts the following technical solution: a traction rope guide device, comprising a guide wheel set installed on a cable bridge main tower gantry, the guide wheel set being used for the traction rope to pass through it, the number of guide wheel sets being several, the several guide wheel sets being arranged at intervals along the direction of the traction rope, the guide wheel set comprising a mounting rack and several guide wheels, the mounting rack being arranged vertically and parallel to the traction rope, the guide wheels being distributed at intervals on the surface of the mounting rack along the extension direction of the traction rope.

[0007] The basic principle of the present application is that the guide wheel sets are respectively installed at the front and rear ends of the cable tower gantry, and a guide wheel set is installed at the end close to the approach bridge, since the traction rope needs to avoid the arc of the approach bridge and twists, the traction rope at this end is inclined outward relative to the bridge deck of the middle bridge body, and the guide wheel set is arranged according to the arc of the twisted traction rope, when the traction rope enters the guide wheel set from the end close to the approach bridge, the traction rope enters the second guide wheel set, the direction of the second guide wheel set is parallel to the direction of the bridge body of the middle cable tower, thereby the two guide wheel sets are used to adapt the direction of the traction rope.

[0008] The beneficial effects of the present application are that the existing traction rope twists when the approach bridge section is an arc section, causing the guide wheel set to not completely fit the traction rope, and the traction rope to easily derail, the guide wheel set in the present application is arranged along the traction rope according to the twisting direction of the traction rope, thereby ensuring that the traction rope can fit the guide wheel set even if it twists, preventing the safety problem of rope jumping from occurring.

[0009] Further, the mounting rack is provided with an anti-rope-jumping structure, the anti-rope-jumping structure comprising a plurality of guide wheels fixed above the traction rope, the upper and lower sides of the traction rope being respectively attached to the guide wheels through the anti-rope-jumping structure.

[0010] Further, the mounting rack is provided with an anti-rope-jumping structure, the anti-rope-jumping structure comprising a plurality of guide wheels fixed above the traction rope, the upper and lower sides of the traction rope being respectively attached to the guide wheels through the anti-rope-jumping structure.

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

[0012] Further, the end of the limiting clip close to the receiving plate is in trapezoidal shape, and an arc surface is opened downward on the upper surface of the limiting clip.

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

[0014] Further, the surface of the guide wheel is provided with a ring groove for limiting and adhering to the circumferential surface of the traction rope.

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

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

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

[0018] Figure 2 is a plan view of the suspension bridge of the present application;

[0019] Figure 3 is a schematic view of the present application;

[0020] Figure 4 is a plan view of embodiment 1 of the present application;

[0021] Figure 5 is a front view of embodiment 2 of the present application;

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

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

[0024] Figure 8 is a plan view of the two guide wheel groups in embodiment 3 of the present application;

[0025] Figure 9 is a sectional view of the hydraulic cylinder in embodiment 3 of the present application. DETAILED DESCRIPTION

[0026] The following will be further explained in detail through specific embodiments:

[0027] The reference signs in the drawings of the specification include: cable bridge main tower 1, portal 2, guide wheel group 3, guide wheel 31, mounting frame 32, support 5, first rotating shaft 61, second rotating shaft 62, receiving plate 7, limiting clip 71, passive plate 8, recess 81, limiting groove 82, spring 9, traction rope 10, hydraulic cylinder 11, piston 111, hydraulic oil 112, on-off valve 113, third rotating shaft 12, horizontal guide wheel 13, rotating speed sensor 14.

[0028] Embodiment 1

[0029] Embodiment 1 is basically as shown in the accompanying drawings Figure 1 to the accompanying drawings Figure 4 :

[0030] The traction rope guide device is installed on the upper end of the portal 2 of the main tower 1 of the cable-stayed bridge, and includes two groups of guide wheel sets 3. Each guide wheel set 3 includes a plurality of guide wheels 31 and a mounting frame 32. The mounting frame 32 is a vertical panel, and the guide wheels 31 are arranged on the inner side surface of the mounting frame 32 and are spaced apart along the length of the mounting frame 32. The rotation shaft of the guide wheel 31 is perpendicular to the surface of the mounting frame 32. An annular groove is formed on the circumferential surface of the guide wheel 31 and is recessed inward, and the annular groove is used for clamping the traction rope 10.

[0031] In this embodiment, one guide wheel 31 is arranged above each of the guide wheels 31 located at the two ends of the mounting frame 32. The annular grooves on the circumferential surfaces of the upper and lower guide wheels 31 are in close contact with the outer wall of the traction rope 10, so that the upper and lower traction ropes 10 are simultaneously limited, and the jumping of the traction rope 10 is prevented.

[0032] As shown in the accompanying drawings Figure 4 , the two groups of guide wheel sets 3 in this embodiment are installed on different vertical planes along the extension direction of the traction rope 10. Specifically, the two groups of guide wheel sets 3 are installed at the front end and the rear end of the portal 2 of the main tower 1 of the cable-stayed bridge, respectively. Among the two groups of guide wheels 31, the plane on which the guide wheels 31 close to the approach of the bridge are located has a certain angle with the plane on which the middle part of the bridge is located, and the plane on which the guide wheels 31 far away from the approach of the bridge are located is parallel to the plane on which the middle part of the bridge is located. Thus, the front and rear sections of the traction rope 10 that is twisted are guided by the guide wheel sets 3 on different planes, respectively, so that the problem of the jumping of the traction rope 10 caused by the twisting of the traction rope 10 due to the arrangement of only one group of guide wheels 31 is avoided.

[0033] The specific implementation process is as follows:

[0034] The traction rope 10 extends from the anchor bit at the approach to the portal 2 of the main tower. Since the approach has a large curvature, the traction rope 10 needs to be twisted outwardly and obliquely to avoid the curved approach. The traction rope 10 passes through the first group of guide wheel sets 3 parallel to the twisting angle of the traction rope 10, and the first group of guide wheel sets 3 guides and limits the front section of the traction rope 10 close to the approach. The traction rope 10 extends to the second group of guide wheel sets 3, and the angle between the second group of guide wheel sets 3 and the middle section of the bridge between the two main towers of the cable-stayed bridge is parallel. After the traction rope 10 passes through the second group of guide wheel sets 3, the traction rope 10 can extend straight along the middle section of the bridge to the main tower on the opposite bank. When the traction rope 10 reaches the main tower on the opposite bank, one or two groups of guide wheel sets 3 with different angles are arranged according to the condition of the approach behind the main tower on the opposite bank, so that the normal operation of the traction rope 10 in the circulating traction system can be ensured.

[0035] Embodiment 2

[0036] Embodiment 2 is basically as shown in the accompanying drawingsFigure 5 To the attached Figure 6 As shown:

[0037] The difference between the present embodiment and embodiment 1 is that the anti-jumping rope structure of the present embodiment is different, and the present embodiment is based on the scheme of embodiment 1, which is not described here.

[0038] The specific anti-jumping rope structure includes a support 5, a first rotating shaft 61, and a second rotating shaft 62. The support 5 is symmetrical and fixed at both ends of the guide wheel set 3 mounting frame 32. The first rotating shaft 61 and the second rotating shaft 62 are horizontally arranged from top to bottom along the support 5.

[0039] The first rotating shaft 61 is hinged with a receiving plate 7, and the movable end of the receiving plate 7 is fixed with a "door" type limiting clamp 71. The limiting clamp 71 is symmetrically arranged at both ends of the receiving plate 7, and one end of the limiting clamp 71 fixed on the receiving plate 7 is in a trapezoidal shape. The two limiting clamps 71 are fixed by a crossbeam to form a whole, and the crossbeam is a cylindrical segment. An arc surface is opened on the upper surface of the trapezoidal limiting clamp 71, which can better fit the traction rope 10.

[0040] The second rotating shaft 62 is hinged with a passive plate 8, and the side of the passive plate 8 away from the receiving plate 7 is provided with an arc limiting groove 82 penetrating both ends of the passive plate 8. The arc limiting groove 82 can slide up and down the cylindrical segment of the limiting clamp 71. A groove 81 is opened on the surface of the passive plate 8 close to the receiving plate 7, which can make the movable end of the receiving plate 7 not touch the passive plate 8 when rotating.

[0041] The side wall of the passive plate 8 is connected with a spring 9 between the side support 5, and the spring 9 is a compression spring.

[0042] The specific implementation process is as follows:

[0043] When the traction rope 10 jumps out of the ring groove of the guide wheel 31 and slides outward on the surface of the receiving plate 7, the traction rope 10 simultaneously presses the movable end of the receiving plate 7 downward, and drives the cylindrical segment of the limiting clamp 71 to slide downward in the limiting groove 82. When the cylindrical segment slides downward, the passive plate 8 is pressed to rotate downward along the second rotating shaft 62. At this time, the spring 9 is stretched, the cable falls into the arc surface of the limiting clamp 71, and the intersection of the limiting clamp 71 and the passive plate 8 can limit the lower surface and the side surface of the cable to prevent the cable from completely falling onto the top platform of the tower. When the staff needs to install the cable back into the guide wheel group, only the movable end of the passive plate 8 needs to be pushed, and under the action of the contraction force of the spring 9, the passive plate 8 is driven to rotate upward to approach the surface of the guide wheel 31, thereby driving the limiting clamp 71 to slide upward along the limiting groove 82, so that the receiving plate 7 rotates upward, and the cable is pushed upward. The cable slides back into the ring groove of the guide wheel 31 along the surface of the receiving plate 7, and the abnormal rope derailment situation can be directly handled.

[0044] Example 3:

[0045] Example 3 is substantially as shown in Figure 7 to Figure 9 :

[0046] The difference between this embodiment and examples 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 freely adjust the amplitude of rotation.

[0047] Specifically, a third rotating shaft 12 is additionally installed at the end of the mounting frame 32, the third rotating shaft 12 vertically penetrates the mounting frame 32 and is fixed on the portal 2 of the main tower. An opening is formed on the side wall of the mounting frame 32, so that the horizontal guide wheel 13 can be horizontally placed in the opening. The middle part of the third rotating shaft 12 penetrates the middle shaft of the horizontal guide wheel 13, and 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 simultaneously touch the side circumferential wall of the horizontal guide wheel 13.

[0048] A horizontal hydraulic cylinder 11 is hinged between the back side of the mounting frame 32 and the portal 2. One end of the hydraulic cylinder 11 is hinged on the portal 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 as shown in Figure 9As shown, the inner wall of the hydraulic cylinder 11 is sealingly connected with a piston 111 in sliding mode, the piston 111 separates 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, the two ends of the through hole are respectively communicated with the two chambers, and a switch valve 113 is installed in the through hole, and the switch valve 113 is electrically connected with the controller. When the switch valve is turned on, the diameter of the through hole is 3-5mm, so as to control the flow of the hydraulic oil in the two chambers within a small range; the diameter and length of the chamber is 8-15 times of the through hole.

[0049] A rotation speed sensor 14 for detecting whether the guide wheel 31 rotates is installed beside the guide wheel 31. Specifically, the rotation speed sensor 14 can be a Hall type rotation speed sensor 14. A magnet is eccentrically installed on the shaft 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 shaft of the guide wheel 31 cuts the magnetic field on the Hall type rotation speed sensor 14, and the generated current size detects the rotation of the guide wheel set 3. In order to increase the detection accuracy and save costs, the rotation speed sensor 14 can be arranged on the guide wheels 31 at both ends of only one guide wheel set 3, so as to know that the traction rope 10 enters the guide wheel 31 and travels to cover all the guide wheels 31.

[0050] The rotation speed sensor 14 is electrically connected with the controller, and the controller is used for controlling the opening and closing of the switch valve 113 according to the rotation data of the guide wheel 31 obtained by the rotation speed sensor 14. When the guide wheel 31 rotates, the switch valve 113 is opened, the two chambers in the hydraulic cylinder 11 are communicated, 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 is opened, and the hydraulic oil in the two chambers can flow in a small flow, 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 the position suitable for the circulating rope, and the circulating rope is prevented from derailing.

[0051] When the guide wheel 31 stops rotating, the switch valve 113 is closed, the through hole of the two chambers in the hydraulic cylinder 11 is closed, and the piston 111 is fixed by the hydraulic oil 112 in the two chambers, so that when there is no traction rope 10 sliding on the guide wheel 31, the entire guide wheel set 3 can be stably fixed on the portal frame 2 and cannot be deflected along the third rotation shaft 12.

[0052] The embodiment is the same as embodiments 1 and 2, and a group of guide wheel sets 3 are arranged on the front and back sides of the main tower respectively, as shown in the accompanying drawings. Figure 8

[0053] The specific implementation process is as follows: ​

[0054] In the absence of traction rope 10 through the guide wheel set 3, the rotation speed sensor 14 on the guide wheel set 3 detects that the guide wheel 31 does not rotate, the on-off valve 113 in the hydraulic cylinder 11 is always in the closed state, the piston 111 does not slide, and the guide wheel set 3 is installed on the portal frame 2 in a stationary state.

[0055] When the traction rope 10 passes through the guide wheel set 3, the guide wheel 31 of the guide wheel set 3 rotates, and after the rotation speed sensor 14 detects that the guide wheel 31 rotates, the controller controls the on-off valve 113 in the hydraulic cylinder 11 to open. The on-off 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 is deflected 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 touching the horizontal guide wheel 13, so that the entire guide wheel set 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 set 3, and can adapt to the shaking of the traction rope 10 during pulling through the free sliding of the hydraulic oil 112 in the cylinder piston 111, avoiding the occurrence of jumping off. The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme known in the art are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application, and these will not affect the effect and practicality of the patent. The protection scope claimed in this application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A ropeway installation comprising a guide wheel set mounted on a tower portal of a cable bridge, the guide wheel set being intended for the passage of a traction rope therethrough, characterized in that: The number of the guide wheel groups is two, the two groups of guide wheel groups are arranged at intervals along the direction of the traction rope, the two groups of guide wheel groups are respectively installed at the front end and the rear end of the main tower door frame of the cable bridge, the plane where the guide wheel group close to the approach bridge of the bridge end part is located has an angle with the plane where the middle part of the bridge is located, the plane where the other guide wheel group far away from the approach bridge of the bridge end part is located is parallel to the plane where the middle part of the bridge is located, the guide wheel group comprises a mounting frame and a plurality of guide wheels, the mounting frame is arranged vertically and parallel to the traction rope, and the guide wheels are arranged at intervals on the surface of the mounting frame along the extension direction of the traction rope; The mounting frame is provided with an anti-escape rope structure, the anti-escape rope structure comprises a support, a first rotating shaft and a second rotating shaft, the number of the support is two and the two supports are symmetrically installed at the two ends of the mounting frame, the first rotating shaft and the second rotating shaft are arranged at intervals from top to bottom along the support, a bearing plate is hinged to the first rotating shaft, a passive plate is hinged to the second rotating shaft, a limiting groove penetrating through the side walls of the two ends of the passive plate is formed in the surface of the passive plate away from the bearing plate, the limiting groove is an arc-shaped groove, limiting clamps are respectively fixed at one end of the bearing plate close to the passive plate, and the ends of the limiting clamps away from the bearing plate are connected through a cross beam which penetrates through the limiting groove and can slide up and down in the limiting groove; Springs are connected between the mounting frame and the side walls of the passive plate; The end of the limiting clamp close to the bearing plate is in a trapezoidal shape, and an arc surface recessed downward is formed in the upper surface of the limiting clamp.

2. A traction rope guide arrangement according to claim 1, characterized in that: The mounting frame is provided with an anti-swing rope structure, the anti-swing rope structure comprises 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-swing rope structure.

3. The tow rope guide of claim 1, wherein: The guide wheel groups are two groups respectively and are respectively fixed at the front and rear ends of the cable tower door frame.

4. The tow rope guide of claim 3, wherein: The surface of the guide wheel is provided with a ring groove for limiting and attaching the circumferential surface of the traction rope.

5. The tow rope guide of claim 4, wherein: The diameter of the traction rope is 42-45 mm.

6. The tow rope guide of claim 5, wherein: The nominal tensile strength of the traction rope is 1770-1800 MPa.

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