Wire tightener for electric power construction

Abstract

The application relates to the technical field of electric power construction equipment, and discloses a line tightener for electric power construction, which comprises a shell, a force-bearing rope, a wrench, a line tightening mechanism and a line clamping mechanism. The line tightening mechanism comprises a ratchet wheel rotatably connected in the shell, a pawl unidirectionally meshed with the gear teeth of the ratchet wheel to limit reverse rotation of the ratchet wheel, a pulley around which the force-bearing rope is arranged, and a reversing assembly for switching the line winding and unwinding states. The line clamping mechanism is connected with the pulley through a hook. The line clamping mechanism comprises a locking block, a connecting rod connected with the locking block, an upper clamping plate and a lower clamping plate rotatably connected with the connecting rod, and a quick release assembly arranged between the upper clamping plate and the lower clamping plate. The application has the beneficial effects of safe operation, accurate force release, high universality and reduced construction cost.

Description

Technical Field

[0001] This application relates to the field of power construction equipment technology, and in particular to a tensioner for power construction. Background Technology

[0002] Wire tensioners are an indispensable key tool in the construction of power lines. They are mainly used to apply a predetermined tension to conductors or ground wires during the laying and tensioning of overhead lines in order to accurately adjust the sag of the line and fix it to insulators or fittings.

[0003] Currently, the core transmission and locking functions of manual cable tensioners widely used in power construction largely rely on ratchet and pawl mechanisms. During cable tensioning, the operator reciprocates by pulling the wrench, driving the ratchet to rotate in one direction to tighten the cable. The pawl continuously engages between the teeth of the ratchet, effectively preventing the cable from slipping out under high tension, thus ensuring the smooth progress of the tensioning operation.

[0004] However, the inherent defects of the existing ratchet and pawl structure become apparent when the cable is tensioned to the predetermined tension and needs to be released or fine-tuned. Because the ratchet and pawl mechanism is designed for one-way locking, the pawl is tightly pressed into the ratchet's teeth when the cable is under immense tension. To release the tension, the operator must forcibly pry the pawl off the engagement. This process is not only laborious, but more importantly, once the pawl disengages, the ratchet instantly loses all restraint, causing the cable to snap back under immense tension, driving the wrench in a high-speed reverse direction. This poses a significant safety hazard and could easily cause serious injury to the operator. Furthermore, this sudden release method cannot provide smooth and precise fine-tuning control of the cable tension. Utility Model Content

[0005] In view of the problems in the existing power construction tensioners, such as difficulty in accurately controlling the unloading of force and the inability of their clamping mechanism to adapt to different specifications of cables, this application provides a power construction tensioner with an improved structure that can effectively solve the above problems.

[0006] This application provides a wire tensioner for power construction, including a housing, a load-bearing rope, a wrench, a wire tensioning mechanism, and a wire clamping mechanism; The tensioning mechanism includes a ratchet rotatably connected to the housing, a pawl that engages unidirectionally with the teeth of the ratchet to limit its reverse rotation, a pulley around which the load-bearing rope is wound, and a reversing component for switching between the take-up and release states. The wrench is connected to the ratchet and is used to drive the load-bearing rope to switch between the take-up and release states. The load-bearing rope is sleeved on the ratchet, and the reversing component is disposed inside the wrench. The cable clamping mechanism is connected to the pulley via a hook. The cable clamping mechanism includes a locking block, a connecting rod connected to the locking block, an upper clamping plate and a lower clamping plate rotatably connected to the connecting rod, and a quick-release assembly disposed between the upper clamping plate and the lower clamping plate. When pulled, the locking block can drive the upper clamping plate and the lower clamping plate to close towards each other through the connecting rod to clamp and fix the cable, thereby working together with the cable tightening mechanism to achieve the cable tightening operation.

[0007] Furthermore, the reversing assembly includes a gear and a gear block disposed inside the wrench, and a stop block for controlling the meshing state of the gear block and the gear.

[0008] Furthermore, the wrench is rotatably connected to the gear block, and the gear is rotatably mounted on the rotation axis of the ratchet.

[0009] Furthermore, the quick-release assembly includes a jaw plate, a bolt, and a nut. The jaw plate is detachably installed between the inner sides of the upper clamping plate and the lower clamping plate, and is detachably fixed by the threaded connection between the bolt and the nut.

[0010] Furthermore, the upper clamping plate, the lower clamping plate, and the jaw plate are all provided with mounting holes for the bolts to pass through.

[0011] Furthermore, a hook is also fixedly connected to the rear side of the housing for fixing the housing to an external fixing point.

[0012] Furthermore, the inner surface of the jaw plate that contacts the cable is provided with anti-slip teeth to enhance friction and prevent cable slippage when clamping the wire.

[0013] Compared with the prior art, this application has the following beneficial effects: 1. This application solves the problem that existing tensioners are inconvenient to operate and difficult to control precisely when unloading tensioned cables, posing safety risks, by setting a reversing component inside the wrench. This reversing component can switch the effective working direction of the wrench. The application achieves the technical effect of being able to release the load-bearing rope smoothly and controllably, and accurately unload the cable, greatly improving the safety and convenience of operation.

[0014] 2. This application solves the problem that the existing wire clamping mechanism has a single specification and cannot adapt to cables of different diameters, resulting in poor versatility and high tool cost by setting a quick-release assembly consisting of replaceable jaw plates, bolts and nuts on the upper and lower clamping plates. It achieves the technical effect of clamping cables of different specifications by quickly replacing the jaw plates, thereby enhancing the versatility of the tool and reducing construction costs.

[0015] 3. This application solves the problem in the prior art that the cable will slip during high load tensioning, leading to operation failure or safety hazards, by setting up a linkage structure consisting of locking blocks and connecting rods. Under the traction of the load-bearing rope, the upper and lower clamping plates will close together. This achieves a self-increasing force locking effect where the greater the tension, the stronger the clamping force, ensuring that the cable is not easy to fall off during tensioning and improving the reliability of the operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a power line tensioner provided in an embodiment of this application; Figure 2 A schematic diagram of the ratchet mechanism for power line tensioning provided in an embodiment of this application; Figure 3 A schematic diagram of the structure of the stop block of a tensioner for power construction provided in an embodiment of this application; Figure 4 A schematic diagram of the locking block of a power line tensioner provided in one embodiment of this application; Figure 5 This is a schematic diagram of the jaw plate of a wire tensioner for power construction provided in one embodiment of this application.

[0018] In the picture: 1. Housing; 2. Hook; 3. Load-bearing rope; 4. Wrench; 5. Cable tensioning mechanism; 51. Ratchet; 52. Pad; 53. Pulley; 54. Reversing assembly; 541. Gear; 542. Gear block; 543. Stop block; 6. Cable clamping mechanism; 61. Locking block; 62. Connecting rod; 63. Upper clamping plate; 64. Lower clamping plate; 65. Quick-release assembly; 651. Jaw plate; 652. Nut; 653. Bolt. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0020] Please refer to Figures 1 to 5This application provides a wire tensioner for power construction, which aims to solve the problems in the prior art where the unloading process of the wire tensioner is difficult to control precisely and the wire clamping mechanism cannot be adapted to different specifications of cables.

[0021] like Figure 1 As shown, the power construction tensioner includes a housing 1, a load-bearing rope 3, a wrench 4, a tensioning mechanism 5, and a clamping mechanism 6.

[0022] The tensioning mechanism 5 includes a ratchet 51 rotatably connected to the housing 1, a pawl 52 that meshes with the teeth of the ratchet 51 in one direction to limit its reverse rotation, a pulley 53 on which the load-bearing rope 3 is wound, and a reversing component 54 for switching between the winding and unwinding states. The wrench 4 is connected to the ratchet 51 and is used to drive the load-bearing rope 3 to switch between the winding and unwinding states. The load-bearing rope 3 is sleeved on the ratchet 51, and the reversing component 54 is located inside the wrench 4. The wire clamping mechanism 6 is connected to the pulley 53 via a hook 2, thereby transmitting the tension generated by the wire tightening mechanism 5 to the wire clamping mechanism 6. (Refer to...) Figure 1 , Figure 4 and Figure 5 The cable clamping mechanism 6 includes a locking block 61, a connecting rod 62 connected to the locking block 61, an upper clamping plate 63 and a lower clamping plate 64 rotatably connected to the connecting rod 62, and a quick-release assembly 65 disposed between the upper clamping plate 63 and the lower clamping plate 64. When pulled, the locking block 61 can drive the upper clamping plate 63 and the lower clamping plate 64 to close towards each other via the connecting rod 62 to clamp and fix the cable, thereby working with the cable tightening mechanism 5 to achieve the cable tightening operation. Specifically, as shown... Figure 1 , Figure 4 and Figure 5 As shown, the upper end of the locking block 61 is provided with a hanging ring for connecting with the hook 2 on the pulley 53. Two connecting rods 62 are rotatably connected to the rear ends of the locking block 61. On the same side of the locking block 61, the other ends of the two connecting rods 62 are rotatably connected to the outer walls of the upper clamping plate 63 and the lower clamping plate 64, respectively. When the load-bearing rope 3 applies a pulling force to the locking block 61 through the hook 2 on the pulley 53, the locking block 61 is pulled and moves. Through the linkage of the two connecting rods 62, the upper clamping plate 63 and the lower clamping plate 64 are forced to move closer to each other synchronously. This linkage structure ensures that the greater the pulling force applied to the cable, the greater the clamping force of the upper clamping plate 63 and the lower clamping plate 64 on the cable will be proportionally increased, thereby realizing a self-increasing force anti-slip locking.

[0023] The power line tensioner provided in this embodiment, through the cooperation of the wrench 4, ratchet 51, pawl 52, and reversing assembly 54, forms a step-by-step release characteristic during the unloading process. The wrench 4 is connected to the ratchet 51, and the pawl 52 engages the teeth of the ratchet 51 in one direction, allowing for tooth-by-tooth force increase during line winding. When line release is required, the operator switches the drive direction using the reversing assembly 54 inside the wrench 4, releasing the line tooth by tooth with small-angle reciprocating operation. Since the load-bearing rope 3 is sleeved on the ratchet 51 and guided by the pulley 53, the small angular movement of the ratchet 51 is converted into the linear displacement of the load-bearing rope 3. Each tooth pitch corresponds to a certain release amount, and the pawl 52 acts as a counter-current preventer during intermittent operation, thus making the unloading process present a graded characteristic of "release-counter-current release". This discrete movement mode, compared with the traditional continuous sliding release, helps to improve the controllability of unloading and reduces the danger caused by sudden instability.

[0024] Meanwhile, in this embodiment, the tensioning mechanism 5 is entirely housed within the casing 1, forming a force transmission relationship primarily composed of the ratchet 51, pawl 52, load-bearing rope 3, and pulley 53. This structure ensures stable force transmission, and even when the operator stops applying force, the pawl 52 still restricts the ratchet 51 from reversing, preventing the load-bearing rope 3 from freely rewinding. The reversing component 54 is located inside the wrench 4, and its function is limited to changing the drive direction; it does not affect the meshing relationship between the pawl 52 and the ratchet 51. This built-in arrangement reduces external protrusions and also lowers the possibility of accidental switching due to unintentional contact. This ensures that the unloading boundary is constrained by both "tooth pitch control and anti-reverse meshing," helping to reduce the risk of sudden release during the unloading process.

[0025] Furthermore, in this embodiment, the cable clamping mechanism 6, through the cooperation of the locking block 61, connecting rod 62, upper clamping plate 63, and lower clamping plate 64, achieves clamping action when the load-bearing rope 3 is under tension. The connection between the locking block 61 and the connecting rod 62 allows the tension to be converted into the closing force of the clamping plates, thereby reliably clamping the cable. The quick-release assembly 65 is located between the two clamping plates, providing convenient opening and closing operations when clamping the cable. Since the clamping force and the tension of the load-bearing rope 3 act synchronously, the clamping gap can be adjusted according to the cable diameter, thus providing good fit for cables of different diameters without the need for fixed specification bushings. Combined with the force-bearing connection between the cable clamping mechanism 6 and the pulley 53 through the hook 2, the cable remains stable during tightening and loosening, which helps to improve versatility and reliability.

[0026] Based on the above embodiments, this application may further include the following preferred technical solutions: As a preferred embodiment, please refer to Figure 2 and Figure 3The reversing assembly 54 includes a gear 541 and a toothed block 542 disposed inside the wrench 4, and a stop 543 for controlling the meshing state of the toothed block 542 and the gear 541. The wrench 4 is rotatably connected to the toothed block 542, and the gear 541 is rotatably disposed on the rotation axis of the ratchet 51. By operating the stop 543, different tooth surfaces of the toothed block 542 and the gear 541 can be meshed or disengaged, thereby changing the unidirectional drive locking direction of the wrench 4.

[0027] In some embodiments, the wrench 4 is rotatably connected to the toothed block 542, and the gear 541 is rotatably disposed on the rotation axis of the ratchet 51. By shifting the stop block 543 to switch the meshing mode of the toothed block 542 and the gear 541, the effective working direction of the wrench 4 relative to the ratchet 51 is switched, thereby realizing the forward drive tightening or controlled reverse loosening operation of the ratchet 51.

[0028] Meanwhile, to accommodate cables of different specifications, in some embodiments, the quick-release assembly 65 includes a jaw plate 651, a bolt 653, and a nut 652. The jaw plate 651 is detachably installed between the inner sides of the upper clamping plate 63 and the lower clamping plate 64, and is detachably fixed by a threaded connection between the bolt 653 and the nut 652. Simultaneously, mounting holes for the bolt 653 are provided on the upper clamping plate 63, the lower clamping plate 64, and the jaw plate 651. The jaw plate 651 is fixed by the bolt 653 passing through these mounting holes and threadedly connected to the nut 652 tightened on the other side. When the jaw plate 651 needs to be replaced, it can be quickly disassembled by simply loosening the nut 652 and pulling out the bolt 653. The inner surface of the jaw plate 651 that contacts the cable is also provided with anti-slip teeth to further increase the friction during clamping.

[0029] In a preferred embodiment, in order to securely anchor the entire device at the work point, a hook 2 is also fixedly connected to the rear side of the housing 1 for fixing the housing 1 to an external fixing point.

[0030] As a preferred embodiment, please refer to Figure 5 To further enhance the reliability of clamping, the inner surface of the jaw plate 651 that contacts the cable is provided with anti-slip teeth to increase friction and prevent the cable from slipping when clamping the wire, thereby preventing the cable from slipping when under tension.

[0031] The working principle is as follows: Before performing the cable pulling operation, first select and replace the matching jaw plate 651 according to the specifications of the cable to be clamped by using the quick-release assembly 65. Loosen the nut 652 and pull out the bolt 653 to remove the old jaw plate 651. After replacing it with the new jaw plate 651, tighten it with the bolt 653 and nut 652. Then clamp the cable clamping mechanism 6 onto the cable, hang the second hook 2 on the back of the housing 1 on the tower or other fixed point, and connect the first hook 2 on the pulley 53 to the locking block 61 of the cable clamping mechanism 6 to complete the preparation work.

[0032] When the cable needs to be tightened, the operator moves the stop 543 of the reversing assembly 54, causing the toothed block 542 inside the wrench 4 to mesh with the gear 541, setting the wrench 4 to only effectively drive the ratchet 51 in the counterclockwise direction. The operator rotates the wrench 4 counterclockwise, and the ratchet 51 rotates accordingly, tightening the load-bearing rope 3 wound on it. The load-bearing rope 3 pulls the entire cable clamping mechanism 6 towards the housing 1 through the pulley 53, thereby tightening the cable. During this process, the pawl tip of the pawl 52 is always locked in the tooth groove of the ratchet 51, preventing the ratchet 51 from reversing due to the huge tension of the cable, ensuring operational safety. At the same time, the tension of the load-bearing rope 3 on the locking block 61 will cause the upper clamping plate 63 and the lower clamping plate 64 to continue to clamp through the linkage of the connecting rod 62. The greater the tension, the greater the clamping force of the jaw plate 651 on the cable, effectively preventing the cable from slipping during the tightening process.

[0033] When it is necessary to relieve or loosen the cable tension, the operator moves the stop 543 of the reversing component 54 again to switch the engagement state of the toothed block 542 and the gear 541, so that the wrench 4 can only effectively drive the ratchet 51 in the clockwise direction. Then, the operator manually lifts the pawl 52 to disengage it from the ratchet 51. At this time, by turning the wrench 4 clockwise, the operator can precisely control the reverse rotation speed and angle of the ratchet 51, and smoothly release the load-bearing rope 3, thereby achieving controlled release of cable tension and avoiding the safety risks caused by sudden unloading in the traditional method.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A tensioner for power construction, characterized in that, It includes a housing (1), a load-bearing rope (3), a wrench (4), a tensioning mechanism (5), and a clamping mechanism (6); The tensioning mechanism (5) includes a ratchet (51) rotatably connected in the housing (1), a pawl (52) that engages unidirectionally with the teeth of the ratchet (51) to limit its reverse rotation, a pulley (53) around which the load-bearing rope (3) is wound, and a reversing assembly (54) for switching between the winding and unwinding states. The wrench (4) is connected to the ratchet (51) and is used to drive the load-bearing rope (3) to switch between the winding and unwinding states. The load-bearing rope (3) is sleeved on the ratchet (51), and the reversing assembly (54) is disposed inside the wrench (4). The cable clamping mechanism (6) is connected to the pulley (53) via a hook (2). The cable clamping mechanism (6) includes a locking block (61), a connecting rod (62) connected to the locking block (61), an upper clamping plate (63) and a lower clamping plate (64) rotatably connected to the connecting rod (62), and a quick-release assembly (65) disposed between the upper clamping plate (63) and the lower clamping plate (64). When the locking block (61) is pulled, it can drive the upper clamping plate (63) and the lower clamping plate (64) to close towards each other through the connecting rod (62) to clamp and fix the cable, thereby achieving the cable tightening operation together with the cable tightening mechanism (5).

2. The tensioner for power construction according to claim 1, characterized in that, The reversing assembly (54) includes a gear (541) and a tooth block (542) disposed inside the wrench (4), and a stop block (543) for controlling the meshing state of the tooth block (542) and the gear (541).

3. The tensioner for power construction according to claim 2, characterized in that, The wrench (4) is rotatably connected to the toothed block (542), and the gear (541) is rotatably disposed on the rotation axis of the ratchet (51).

4. The tensioner for power construction according to claim 1, characterized in that, The quick-release assembly (65) includes a jaw plate (651), a bolt (653), and a nut (652). The jaw plate (651) is detachably installed between the inner sides of the upper clamping plate (63) and the lower clamping plate (64), and is detachably fixed by the threaded connection between the bolt (653) and the nut (652).

5. The tensioner for power construction according to claim 4, characterized in that, The upper clamping plate (63), the lower clamping plate (64), and the jaw plate (651) are all provided with mounting holes for the bolts (653) to pass through.

6. The tensioner for power construction according to claim 1, characterized in that, The rear side of the housing (1) is also fixedly connected with a hook (2) for fixing the housing (1) to an external fixing point.

7. A tensioner for power construction according to claim 1, characterized in that, The inner surface of the jaw plate (651) in contact with the cable is provided with anti-slip teeth to enhance friction and prevent cable slippage when clamping the wire.

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