A straddle-type sling clip twist correction device and method

Abstract

This invention discloses a straddle-type cable clamp torsion correction device and method, including a main beam, main cable, cable clamp, sling, lifting lug, first main rope, fixed pulley block, movable pulley block, second main rope, steering pulley, and winch. The cable clamp is fixed to the outer periphery of the main cable and has a saddle groove on its outer side. The lifting lug is fixed to the top of the main beam. The middle part of the sling spans the saddle groove of the cable clamp, and both ends are fixedly connected to the lifting lug. The first main rope is sleeved in the spare saddle groove of the cable clamp. The fixed pulley block is connected to the first main rope through a connecting component. The movable pulley block is fixed to the lifting lug. The second main rope is sleeved on the main cable and has a steering pulley at the bottom. A pull rope is wound between the fixed pulley block and the movable pulley block. One end of the pull rope is fixed to the fixed pulley block, and the other end is wound around the drum of the winch through the steering pulley. This invention uses a winch to drive a pulley block to transmit the rope, and utilizes its multiplier effect to convert the traction force into the torsional driving force of the cable clamp, which drives the cable clamp to rotate synchronously with the main cable, thereby correcting the relative position of the sling and the cable clamp.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and more specifically, relates to a straddle-type cable clamp torsion correction device and method. Background Technology

[0002] In the field of suspension bridge engineering, the connection method between the suspenders and the clamps is a key factor affecting the structural stability and applicability of the bridge. Currently, the mainstream connection methods are mainly divided into two categories: straddle type and pin type. Among them, the straddle type suspender has the core advantage of high four-way torsional freedom between itself and the clamp, which can better adapt to the complex spatial force system of spatial cable suspension bridges, and therefore has been widely used in the construction of spatial cable suspension bridges.

[0003] From a construction technology perspective, conventional spatial cable suspension bridges mostly adopt a "beam-first, cable-later" construction process. This involves first installing the stiffening girder, and then installing the cable clamps and suspenders on the already formed bridge deck. This process ensures that the installation of the cable clamps and suspenders takes place in the stable environment of the bridge deck, reducing construction difficulty and facilitating quality control. However, for long-span spatial cable suspension bridges, navigation restrictions across waterways or road access control requirements often preclude the "beam-first, cable-later" process. In such cases, the "cable-first, beam-later" process, typically used in conventional suspension bridge construction, must be employed. This involves first installing the main cable, cable clamps, and suspenders, and then installing the stiffening girder. The cable clamp structure of spatial cable suspension bridges has a specific design installation angle, fundamentally different from that of parallel cable suspension bridges. In the "cable-first, beam-later" construction process, after the cable clamps are installed, the external forces generated during subsequent suspender and stiffening girder installation operations can easily cause the cable clamps to twist and shift. Torsional displacement of the cable clamps directly generates additional internal stress in the main cable. If this internal stress cannot be effectively eliminated, it will seriously affect the bridge's operational safety in the later stages, potentially leading to a series of hidden dangers such as fatigue damage to the main cable and uneven stress on the suspenders. The conventional solution is to adjust the cable clamps by loosening the suspenders and reinstalling them or by lifting and re-installing the stiffening girder after torsion is detected. However, the adjustment process is complex, and it is extremely difficult to adjust the cable clamps after the main girder has been hoisted. Summary of the Invention

[0004] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a straddle-type cable clamp torsion correction device and method. By connecting the main beam lifting lug to the cable clamp, the pressure exerted by the sling on the clamp can be effectively dispersed. Simultaneously, during the pull-down operation, the generated torque provides the necessary sliding force for the clamp's torsion, significantly optimizing the force state during clamp adjustment. Furthermore, utilizing the pulley system formed by the combination of fixed and movable pulleys, the winch's rope winding stroke can be amplified by a preset ratio n to the clamp's torsion adjustment amount. Even for minute relative torsional offsets between the clamp and the sling, precise control can be achieved through accurate calculation of n×L and control of the rope winding and unwinding length. Additionally, by deploying a rotation angle sensor on the outside of the clamp to collect torsion data in real time, accurate data support can be provided for the adjustment calculation, further improving control precision.

[0005] To achieve the above objectives, according to one aspect of the present invention, a straddle-type sling clamp torsion correction device is provided, comprising a main beam, main cable, clamp, sling, lifting lug, first main rope, fixed pulley block, movable pulley block, second main rope, steering pulley, and winch; wherein... The cable clamp is fixed to the outer periphery of the main cable, and the cable clamp has a saddle groove for fitting the sling; the lifting lug is fixed to the top of the main beam, and the lifting lug is vertically positioned directly below the cable clamp; the middle part of the sling is extended upwards into the saddle groove of the cable clamp, and the two ends of the sling are fixedly connected to the lifting lug, forming a suspension support structure for the main beam. The first main rope is fitted into the spare saddle groove of the cable clamp, and the first main rope is fitted against the inner wall of the saddle groove of the cable clamp, so as to accurately transmit the correction force to the cable clamp. The fixed pulley group is installed on the first main rope through the connecting component, and the movable pulley group is fixed on the lifting lug. The fixed pulley group and the movable pulley group are correspondingly arranged and form a pulley group transmission mechanism. By utilizing the pulley group multiplier effect, the traction force of the winch can be converted into the driving force required for the cable clamp to twist, so as to realize the correction of the main cable. The second main rope is sleeved on the outer periphery of the main cable, and a steering pulley is provided at its bottom. A pull rope is wound between the fixed pulley group and the movable pulley group, and one end of the pull rope is fixedly connected to the fixed pulley group. The other end passes around the steering pulley and is wound on the drum of the winch. The winch is fixedly installed on the main tower. The winch drives the pulley group transmission mechanism to run through the rope winding and unwinding action of the winch, thereby driving the cable clamp to rotate synchronously with the main cable, and finally achieving precise correction of the relative position of the sling and the cable clamp.

[0006] Furthermore, the connecting assembly includes a first connecting shackle, a second connecting shackle, and a connecting rope. The first main rope is fixedly connected to one end of the connecting rope via the first connecting shackle, and the other end of the connecting rope is fixedly connected to a fixed pulley group via the second connecting shackle. The connection point between the first connecting shackle and the first main rope is eccentrically located on the side of the main cable where the direction needs to be adjusted.

[0007] Furthermore, the movable pulley block is fixedly connected to the lifting lug via a third connecting shackle; The steering pulley is fixedly connected to the second main rope via a fourth connecting shackle.

[0008] Furthermore, both the fixed pulley group and the movable pulley group include several pulleys arranged side by side in the horizontal direction. The wheel groove axes of each pulley are set in parallel and the wheel groove size is adapted to the pull rope. One end of the pull rope is fixed to the wheel axle of the first pulley of the fixed pulley group and is alternately wound around each pulley of the fixed pulley group and each pulley of the movable pulley group in sequence to form a multi-rate force-saving transmission structure. Its end is wound around the drum of the winch after being reversed by the steering pulley.

[0009] According to a second aspect of the present invention, a method for correcting the torsion of a straddle-type sling clamp is provided, which is implemented using the aforementioned straddle-type sling clamp torsion correction device, comprising the following steps: S100: Under stable ambient temperature conditions, the relative torsional offset between the cable clamp and the sling is measured and denoted as L. S200: The first main rope is sleeved and fixed in the spare saddle groove of the cable clamp, the second main rope is sleeved and fixed on the outer periphery of the main cable, the fixed pulley group is connected to the first main rope through the connecting assembly, the movable pulley group is connected to the lifting lug through the third connecting shackle, the steering pulley is connected to the bottom of the second main rope through the fourth connecting shackle, one end of the pull rope is fixed to the first pulley of the fixed pulley group, and then alternately wound around each pulley groove of the fixed pulley group and the movable pulley group to form a pulley group transmission mechanism. The other end of the pull rope is wound around the drum of the winch after being reversed by the steering pulley. S300: Start the winch to apply the initial tension, so that the rope is taut and the pulley block transmission mechanism is not loose; S400: Based on the preset ratio n of the pulley block transmission mechanism, calculate the preset retraction length of the pull rope as n×L, and mark it on the pull rope; S500: Start the winch and slowly wind up the rope at a uniform speed until the retraction length of the rope reaches the preset n×L. S600: Monitor the relative slippage between the cable clamp and the sling. If the relative offset between the cable clamp and the sling meets the design requirements, remove the torsion correction device. If the torsion angle of the cable clamp does not meet the design standard, repeat steps S100, S400, and S500 until the relative offset between the cable clamp and the sling approaches zero.

[0010] Furthermore, before carrying out the torsion correction adjustment of the cable clamp and the sling, the contact area between the sling and the cable clamp saddle groove must be thoroughly cleaned to remove the surface dust, rust and debris, and then a special lubricant should be evenly applied to the contact area.

[0011] Furthermore, if the relative offset between the cable clamp and the sling does not meet the design requirements after the initial correction adjustment, a second adjustment is required. At this time, the connection point between the first connecting shackle and the first main rope should be adjusted so that the connection point is eccentrically set and precisely corresponds to the side of the main cable in the required adjustment direction. This ensures that during the second adjustment, the traction force transmitted by the pull rope can form a directional driving torque, effectively overcoming the frictional resistance between the sling and the cable clamp saddle groove.

[0012] Furthermore, after the relative positions of the cable clamp and the sling are adjusted to the design requirements, the lubricating grease must be cleaned using a special cleaning agent.

[0013] Furthermore, a rotation angle sensor is installed on the outside of the cable clamp to collect the rotation angle data of the cable clamp in real time and obtain the relative torsional offset between the cable clamp and the sling.

[0014] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. The present invention provides a straddle-type sling clamp torsion correction device, comprising conventional and common components such as a first main rope, a second main rope, first / second / third / fourth connecting shackles, a fixed pulley block, a movable pulley block, a steering pulley, a connecting rope, and a winch. It does not require complex and precise customized structural design, the components are easy to procure, and the assembly difficulty is low. The device can be built by simply following the process of "main rope sleeve → connecting shackle assembly → pulley block and steering pulley installation → rope winding". The entire process does not require large hoisting equipment or precision control instruments. Correction can be achieved simply by winding and unwinding the rope with a winch. The operation process is clear and easy to understand.

[0015] 2. The straddle-type cable clamp torsion correction device of the present invention can be carried out after the key process of stiffening beam hoisting is completed, without having to be carried out simultaneously with stiffening beam hoisting. This avoids the problem of auxiliary processes occupying the time of core processes, and realizes the process advancement mode of "prioritizing stiffening beam hoisting and staggering correction operations". It can significantly improve the overall construction efficiency of stiffening beam. The correction operation can be completed on the beam surface. Compared with traditional high-altitude suspended operations or under-bridge operations, the beam surface has sufficient working space and a wide field of vision. Moreover, there is no need to build a complex high-altitude working platform. This not only greatly reduces the construction difficulty of device transportation and positioning, but also effectively avoids safety risks such as falling from height and component collisions, and effectively ensures the work safety of construction personnel.

[0016] 3. The straddle-type sling clamp torsion correction device of the present invention uses a pulley group transmission mechanism formed by the cooperation of a fixed pulley group and a movable pulley group. Utilizing its multiplier effect, the rope winding stroke of the winch can be amplified by a preset multiplier n to the torsional adjustment amount of the sling clamp. Even for a small relative torsional offset between the sling clamp and the sling, precise control can be achieved by precisely controlling the rope winding and unwinding length (i.e., the calculation and control of n×L). This effectively solves the problem of the difficulty in accurately controlling small adjustment amounts in the prior art. By arranging a rotation angle sensor on the outside of the sling clamp to collect torsional data in real time, a precise basis is provided for the calculation of the adjustment amount.

[0017] 4. The present invention provides a straddle-type cable clamp torsion correction device, which connects the main beam lifting lug and the cable clamp through the torsion correction device. It can effectively disperse the pressure applied by the sling to the cable clamp. At the same time, during the lowering operation of the device, the generated torque provides the necessary sliding force for the cable clamp torsion. By precisely controlling the amount of retraction of the pull rope, the torsion adjustment angle of the cable clamp can be accurately controlled. Before the correction adjustment, lubricant is applied to the saddle groove of the cable clamp in advance, which can significantly reduce the friction coefficient between the saddle groove and the sling during the adjustment process and ensure the smoothness of the cable clamp torsion adjustment. After the relative position of the cable clamp and the sling is adjusted to the design requirements, a special cleaning agent is used to thoroughly clean the residual lubricant on the saddle groove and the surface of the sling to ensure the stability of the connection between the two. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the elevation structure of a straddle-type cable clamp torsion correction device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the transverse structure of a straddle-type cable clamp torsion correction device according to an embodiment of the present invention; Figure 3 This is a schematic flowchart of a straddle-type sling clamp torsion correction method according to an embodiment of the present invention.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-main beam, 2-main cable, 3-clip clamp, 4-sling, 5-lifting lug, 6-first main rope, 7-first connecting shackle, 8-fixed pulley block, 9-moving pulley block, 10-pull rope, 11-second connecting shackle, 12-second main rope, 13-third connecting shackle, 14-steering wheel, 15-connecting rope, 16-fourth connecting shackle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] In this patent, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0024] Example 1 like Figure 1-2As shown, this embodiment of the invention provides a straddle-type cable clamp torsion correction device, including a main beam 1, a main cable 2, a cable clamp 3, a sling 4, a lifting lug 5, a first main rope 6, a fixed pulley block 8, a movable pulley block 9, a connecting assembly, a second main rope 12, a steering pulley 14, and a winch; wherein, the cable clamp 3 is fixed to the outer periphery of the main cable 2, and the cable clamp 3 has a saddle groove for adapting to the sling 4, the cable clamp 3 and the main cable 2 form an integrated fixed structure to ensure that the two do not slide relative to each other and can rotate synchronously; the lifting lug 5 is fixed to the top of the main beam 1, and the lifting lug 5 is vertically positioned directly below the cable clamp 3, serving as the sling 4 and the correction device. The structure provides a stable support point; the middle part of the sling 4 is extended upwards into the saddle groove of the cable clamp 3, and both ends of the sling 4 are fixedly connected to the lifting lugs 5 to form a suspension support structure for the main beam 1; the first main rope 6 is sleeved in the spare saddle groove of the cable clamp 3, and the first main rope 6 is fitted against the inner wall of the saddle groove of the cable clamp 3, so that the correction force can be accurately transmitted to the cable clamp 3; the fixed pulley group 8 is installed on the first main rope 6 through the connecting component, and the movable pulley group 9 is fixedly installed on the lifting lug 5. The fixed pulley group 8 and the movable pulley group 9 are correspondingly arranged and constitute a pulley group transmission mechanism. By utilizing the pulley group multiplier effect, the traction force of the winch can be converted into the cable... The precise driving force required for the twisting of clamp 3 enables the correction of the main cable. The second main rope 12 is sleeved on the outer periphery of the main cable 2, and a steering pulley 14 is provided at its bottom. The steering pulley 14 is used to change the force direction of the pull rope 10, ensuring that the correction force is transmitted along the preset trajectory. The groove direction of the steering pulley 14 is adapted to the force direction of the pulley group transmission mechanism, which can reduce the friction loss during the transmission of the pull rope 10 and improve the force transmission efficiency. The pull rope 10 is wound between the fixed pulley group 8 and the movable pulley group 9, and one end of the pull rope 10 is fixedly connected to the fixed pulley group 8, while the other end passes around the steering pulley 14 and is wound around the drum of the winch. The winch is fixedly installed on the main tower. The winch's rope winding and unwinding actions drive the pulley block transmission mechanism, which in turn drives the cable clamp 3 to rotate synchronously with the main cable 2, ultimately achieving precise correction of the relative position of the suspender cable 4 and the cable clamp 3. The entire device does not require the removal of the original connection structure of the suspender cable 4 or the cable clamp 3. It can be constructed in situ after the stiffening beam is hoisted. This avoids the complex demolition and reconstruction process in traditional adjustment methods, ensures that the friction coefficient between the main cable 2 and the cable clamp 3 does not decrease, effectively avoids the impact of the accumulation of internal stress in the main cable on the later operation safety of the bridge, and significantly reduces the difficulty of beam surface construction, improving construction efficiency and safety.

[0025] Furthermore, the connecting assembly includes a first connecting shackle 7, a second connecting shackle 11, and a connecting rope 15. The first main rope 6 is fixedly connected to one end of the connecting rope 15 via the first connecting shackle 7, and the other end of the connecting rope 15 is fixedly connected to the fixed pulley group 8 via the second connecting shackle 11. The connection point between the first connecting shackle 7 and the first main rope 6 is eccentrically located on the side of the main cable 2 where the direction needs to be adjusted. This eccentric arrangement can generate a directional driving torque during the pulling of the rope 10. The directional driving torque can overcome the frictional resistance between the sling groove of the sling 4 and the clamp 3, providing a stable sliding force for the clamp 3 to drive the main cable 2 to rotate synchronously, ensuring the smoothness of the relative position adjustment between the sling 4 and the clamp 3.

[0026] Furthermore, the movable pulley block 9 is fixedly connected to the lifting lug 5 through the third connecting shackle 13. The two ends of the third connecting shackle 13 are respectively adapted to the lifting point of the movable pulley block 9 and the reserved connecting hole of the lifting lug 5, so as to realize the rapid assembly and positioning of the movable pulley block 9 and ensure the force stability of the pulley block transmission mechanism.

[0027] Furthermore, the steering pulley 14 is fixedly connected to the second main rope 12 via the fourth connecting shackle 16. The structural strength of the fourth connecting shackle 16 matches the load-bearing capacity of the second main rope 12, which can stably transmit the steering force of the pull rope 10, avoid component loosening or force transmission deviation during the steering process, and ensure the accurate transmission of the correction driving force.

[0028] Furthermore, both the fixed pulley block 8 and the movable pulley block 9 include several pulleys arranged side by side in the horizontal direction. The wheel groove axes of each pulley are set in parallel and the wheel groove size is adapted to the pull rope 10. One end of the pull rope 10 is fixed to the wheel axle of the first pulley of the fixed pulley block 8, and is alternately wound around each pulley of the fixed pulley block 8 and each pulley of the movable pulley block 9 to form a multi-rate force-saving transmission structure. Its end is wound around the drum of the winch after being reversed by the deflector pulley 14.

[0029] Furthermore, the number of pulleys in the fixed pulley group 8 and the movable pulley group 9 can be flexibly set according to actual needs to form a pulley group transmission mechanism with an n-fold amplification efficiency; a pull rope is wound between the two pulley groups, one end of which is fixed to the fixed pulley group 8, and the other end is wound around the drum of the winch fixed on the main tower via a steering pulley. The pulley group is driven by the winch winding and unwinding the rope, and its n-fold amplification effect is used to amplify the winding stroke of the winch by a preset ratio n to the torsional adjustment amount of the cable clamp, so as to drive the cable clamp to rotate synchronously with the main cable, thereby achieving precise correction of the relative position of the sling and the cable clamp.

[0030] Specifically, when performing cable clamp torsion correction operation, the winch is driven to rotate forward, causing the pull rope 10 to gradually wind up on the winch drum. After the pull rope 10 changes direction via the steering pulley 14, it applies axial tension to the fixed pulley block 8, which is then transmitted to the cable clamp 3 through the first main rope 6, realizing partial transfer of the load of the sling 4 to reduce the pressure of the sling 4 on the cable clamp 3. Under the action of this tension, a directional torque is generated, which overcomes the frictional resistance between the sling 4 and the saddle groove of the cable clamp 3, causing the cable clamp 3 to drive the main cable 2 to rotate synchronously around the sling 4, and finally realizing the precise adjustment of the relative offset between the cable clamp 3 and the sling 4.

[0031] Example 2 Combination Figure 1-2 ,like Figure 3 As shown, this invention provides a method for correcting the torsion of a straddle-type sling clamp, which is implemented using the aforementioned straddle-type sling clamp torsion correction device. The specific steps are as follows: S100: Under stable ambient temperature conditions, measure the relative torsional offset between cable clamp 3 and sling 4, and record it as L; S200: The first main rope 6 is sleeved and fixed in the spare saddle groove of the cable clamp 3, the second main rope 12 is sleeved and fixed on the outer periphery of the main cable 2, the fixed pulley group 8 is connected to the first main rope 6 through the connecting assembly, the movable pulley group 9 is connected to the lifting lug 5 through the third connecting shackle 13, the steering pulley 14 is connected to the bottom of the second main rope 12 through the fourth connecting shackle 16, one end of the pull rope 10 is fixed to the first pulley of the fixed pulley group 8, and then alternately wound around the pulley grooves of the fixed pulley group 8 and the movable pulley group 9 to form a pulley group transmission mechanism. The other end of the pull rope 10 is wound around the drum of the winch after being reversed by the steering pulley 14. S300: Start the winch to apply the initial tension, so that the rope 10 is taut and the pulley block transmission mechanism is not loose; S400: Based on the preset multiplier n of the pulley block transmission mechanism, calculate the preset retraction length of the pull rope 10 as n×L, and mark it on the pull rope 10; S500: Start the winch and slowly wind up the rope 10 at a uniform speed until the retraction length of the rope 10 reaches the preset n×L. S600: Monitor the relative slippage between cable clamp 3 and sling 4. If the relative offset between cable clamp 3 and sling 4 meets the design requirements, remove the torsion correction device. If the torsion angle of cable clamp 3 does not meet the design standard, repeat steps S100, S400, and S500 until the relative offset between cable clamp 3 and sling 4 approaches zero.

[0032] Furthermore, before carrying out the torsional correction adjustment of cable clamp 3 and sling 4, the contact area between the sling groove of sling 4 and cable clamp 3 must be thoroughly cleaned to remove surface dust, rust, and debris. Then, special grease should be evenly applied to the contact area. The grease can effectively reduce the frictional resistance between the sling groove of sling 4 and cable clamp 3, preventing relative slippage and jamming due to excessive friction during the adjustment process. It can also reduce wear and damage to the contact surface. In addition, the oil film formed by the grease can also provide temporary protection for the contact area between sling 4 and cable clamp 3, preventing corrosion caused by direct metal contact during the adjustment process. Ultimately, this ensures the smoothness of the synchronous rotation of the main cable 2 driven by cable clamp 3, improving the accuracy of the correction operation and the safety of the structural operation.

[0033] Furthermore, if the relative offset between the cable clamp 3 and the sling 4 does not meet the design requirements after the initial correction adjustment, a second adjustment is required. At this time, the connection point between the first connecting shackle 7 and the first main rope 6 should be adjusted so that the connection point is eccentrically set and precisely corresponds to the side of the main cable 2 in the required adjustment direction. This ensures that during the second adjustment, the traction force transmitted by the pull rope 10 can form a directional driving torque, effectively overcoming the frictional resistance between the sling 4 and the sling groove of the cable clamp 3, ensuring that the cable clamp 3 drives the main cable 2 to rotate smoothly in the preset direction, and improving the accuracy and efficiency of the second adjustment.

[0034] Furthermore, after the relative positions of the cable clamp 3 and the sling 4 are adjusted to the design requirements, a special cleaning agent is needed to clean the grease, thereby ensuring the stability of the connection between the cable clamp 3 and the sling 4.

[0035] Furthermore, a rotation angle sensor is installed on the outside of the cable clamp 3. The rotation angle data of the cable clamp 3 is collected in real time by the rotation angle sensor, and the relative torsional offset between the cable clamp 3 and the sling 4 is accurately obtained, providing data support for subsequent correction stroke calculation.

[0036] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A straddle-type sling clamp torsion correction device, characterized in that, Includes main beam (1), main cable (2), cable clamp (3), sling (4), lifting lug (5), first main rope (6), fixed pulley block (8), movable pulley block (9), connecting assembly, second main rope (12), steering pulley (14), and winch; among which, The cable clamp (3) is fixed to the outer periphery of the main cable (2), and the cable clamp (3) has a saddle groove for fitting the suspender cable (4); the lifting lug (5) is fixed to the top of the main beam (1), and the lifting lug (5) is vertically positioned directly below the cable clamp (3); the middle part of the suspender cable (4) is extended upwards into the saddle groove of the cable clamp (3), and the two ends of the suspender cable (4) are fixedly connected to the lifting lug (5) to form a suspension support structure for the main beam (1); The first main rope (6) is fitted into the spare saddle groove of the cable clamp (3), and the first main rope (6) is fitted against the inner wall of the saddle groove of the cable clamp (3) to accurately transmit the correction force to the cable clamp (3). The fixed pulley group (8) is installed on the first main rope (6) through the connecting component, and the movable pulley group (9) is fixed on the lifting lug (5). The fixed pulley group (8) and the movable pulley group (9) are correspondingly set and form a pulley group transmission mechanism. By utilizing the pulley group multiplier effect, the traction force of the winch can be converted into the driving force required for the cable clamp (3) to twist, so as to realize the correction of the main cable. The second main rope (12) is sleeved on the outer periphery of the main cable (2), and a steering pulley (14) is provided at its bottom. A pull rope (10) is wound between the fixed pulley group (8) and the movable pulley group (9). One end of the pull rope (10) is fixedly connected to the fixed pulley group (8), and the other end is wound around the drum of the winch after passing around the steering pulley (14). The winch is fixedly installed on the main tower. The winch drives the pulley group transmission mechanism to run through the rope winding and unwinding action of the winch, thereby driving the cable clamp (3) to rotate synchronously with the main cable (2), and finally achieving precise correction of the relative position of the sling (4) and the cable clamp (3).

2. The straddle-type cable clamp torsion correction device according to claim 1, characterized in that, The connecting assembly includes a first connecting shackle (7), a second connecting shackle (11), and a connecting rope (15). The first main rope (6) is fixedly connected to one end of the connecting rope (15) through the first connecting shackle (7). The other end of the connecting rope (15) is fixedly connected to the fixed pulley group (8) through the second connecting shackle (11). The connection point between the first connecting shackle (7) and the first main rope (6) is eccentrically located on the side of the main cable (2) where the direction needs to be adjusted.

3. The straddle-type sling clamp torsion correction device according to claim 1, characterized in that, The movable pulley block (9) is fixedly connected to the lifting lug (5) via the third connecting shackle (13); The steering pulley (14) is fixedly connected to the second main rope (12) via the fourth connecting shackle (16).

4. The straddle-type sling clamp torsion correction device according to claim 1, characterized in that, Both the fixed pulley group (8) and the movable pulley group (9) include several pulleys arranged side by side in the horizontal direction. The wheel groove axis of each pulley is set in parallel and the wheel groove size is adapted to the pull rope (10). One end of the pull rope (10) is fixed to the wheel axle of the first pulley of the fixed pulley group (8) and is alternately wound around each pulley of the fixed pulley group (8) and each pulley of the movable pulley group (9) to form a multi-rate force-saving transmission structure. Its end is wound around the drum of the winch after being reversed by the steering pulley (14).

5. A method for correcting the torsion of a straddle-type sling clamp, characterized in that, The device for implementing the straddle-type cable clamp torsion correction device as described in any one of claims 1-4 is characterized by comprising the following steps: S100: Under stable ambient temperature conditions, measure the relative torsional offset between the cable clamp (3) and the sling (4), and record it as L; S200: The first main rope (6) is fitted and fixed in the spare saddle groove of the cable clamp (3), the second main rope (12) is fitted and fixed on the outer periphery of the main cable (2), the fixed pulley group (8) is connected to the first main rope (6) through the connecting assembly, the movable pulley group (9) is connected to the lifting lug (5) through the third connecting shackle (13), the steering pulley (14) is connected to the bottom of the second main rope (12) through the fourth connecting shackle (16), one end of the pull rope (10) is fixed to the first pulley of the fixed pulley group (8), and then alternately wound around the pulley grooves of the fixed pulley group (8) and the movable pulley group (9) to form a pulley group transmission mechanism. The other end of the pull rope (10) is wound around the drum of the winch after being reversed by the steering pulley (14). S300: Start the winch to apply the initial tension, so that the rope (10) is in a taut state, and ensure that the pulley block transmission mechanism is not loose; S400: Based on the preset multiplier n of the pulley block transmission mechanism, calculate the preset retraction length of the pull rope (10) as n×L, and mark it on the pull rope (10); S500: Start the winch and slowly wind up the rope (10) at a uniform speed until the retraction length of the rope (10) reaches the preset n×L; S600: Monitor the relative slippage of the cable clamp (3) and the sling (4). If the relative offset of the cable clamp (3) and the sling (4) meets the design requirements, remove the torsion correction device. If the torsion angle of the cable clamp (3) does not meet the design standard, repeat steps S100, S400 and S500 until the relative offset of the cable clamp (3) and the sling (4) approaches zero.

6. The method for correcting the torsion of a straddle-type sling clamp according to claim 5, characterized in that, Before carrying out the torsion correction adjustment of the cable clamp (3) and the sling (4), the contact area between the sling (4) and the sling groove of the cable clamp (3) must be thoroughly cleaned to remove the floating dust, rust and debris attached to the surface, and then a special grease should be evenly applied to the contact area.

7. The method for correcting the torsion of a straddle-type sling clamp according to claim 5, characterized in that, If the relative offset between the cable clamp (3) and the sling (4) does not meet the design requirements after the first correction adjustment, a second adjustment operation is required. At this time, the connection point between the first connecting shackle (7) and the first main rope (6) should be adjusted so that the connection point is set eccentrically and accurately corresponds to the side of the main cable (2) in the required adjustment direction. This ensures that during the second adjustment, the traction force transmitted by the pull rope (10) can form a directional driving torque, effectively overcoming the frictional resistance between the sling (4) and the sling groove of the cable clamp (3).

8. A method for correcting the torsion of a straddle-type sling clamp according to claim 5, characterized in that, After the relative positions of the cable clamp (3) and the sling (4) are adjusted to the design requirements, the lubricating grease should be cleaned with a special cleaning agent.

9. A method for correcting the torsion of a straddle-type sling clamp according to claim 5, characterized in that, A rotation angle sensor is installed on the outside of the cable clamp (3). The rotation angle data of the cable clamp (3) is collected in real time through the rotation angle sensor to obtain the relative torsional offset between the cable clamp (3) and the sling (4).

Images