A wire tightener for overhead line construction

Abstract

The utility model relates to a wire tightener technical field, and disclose a guide wire tightener for overhead line construction, including support frame, still include: pivot, rotationally connected in the two inner side wall of support frame, and the middle part integration steel wire rope reel, protection shell, fixedly connected in one outer side wall of support frame, the utility model discloses on the basis of existing single ratchet lock, add the secondary protection chain that constitutes by clutching mechanism, trigger type ratchet and bidirectional screw rod clamping. When the main ratchet pawl is invalid because of abrasion, vibration or misoperation, the pivot is driven to reverse instantaneously by the rebound force of the guide wire, the trigger pawl immediately engages the trigger ratchet, and the reverse power is almost losslessly transmitted to the bidirectional screw rod. The screw rod has small lifting angle and large mechanical gain, which can amplify the rebound tension by several times and convert it into strong clamping force. The V-shaped groove is more and more tight, and relies on the screw rod self-locking to keep the locked state for a long time, reducing the risk of pivot reverse and guide wire falling.

Description

Technical Field

[0001] This utility model relates to the field of wire tensioner technology, specifically a wire tensioner for overhead line construction. Background Technology

[0002] In the construction and maintenance of overhead transmission and distribution lines, the double-hook tensioner is a core manual tool for adjusting and precisely securing conductor tension. Utilizing a mechanical transmission structure, it efficiently converts the operator's manual labor into conductor tightening force, ensuring that conductor sag strictly meets design standards. It is a key piece of equipment for guaranteeing the long-term safe and stable operation of the lines.

[0003] Existing double-hook wire tensioners generally adopt a single ratchet drive design: after the wire is tightened, the anti-reverse locking is achieved solely through a single ratchet mechanism. However, the ratchet pawl is at risk of losing its reset ability due to wear, vibration, or misoperation. Once the anti-reverse function fails, the shaft will rotate unrestrained under the tension of the wire, causing both wire ropes to slack simultaneously, which can easily lead to safety accidents such as wire falling or loss of sag control. Utility Model Content

[0004] The purpose of this utility model is to provide a conductor tensioner for overhead line construction, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a conductor tensioner for overhead line construction, comprising a support frame, and further comprising: The pivot is rotatably connected between the two inner side walls of the support frame, and a steel wire rope drum is integrated in the middle of it; The protective shell is fixed to one of the outer side walls of the support frame; A clutch mechanism is installed inside one side wall of the support frame. One side of the clutch mechanism is fixedly connected to one end of the rotating shaft, and a trigger ratchet mechanism is coaxially provided on the other side. The trigger ratchet mechanism includes a trigger gear, and the end of the trigger gear away from the support frame is rotatably supported on the inner wall of the protective shell. The lead screw clamping mechanism is set between the two inner side walls of the support frame, including a bidirectional lead screw. The two ends of the bidirectional lead screw are rotatably supported inside the support frame and inside the protective shell, respectively, and a lead screw gear is coaxially fixed to one side of the smooth rod section. The lead screw gear is meshed with the trigger gear.

[0006] Preferably, the clutch mechanism includes a first spline column fixed to one end of a rotating shaft, a second spline column coaxially sleeved on the outer side of the first spline column, one end of the second spline column being rotatably supported inside a support frame, a first spline block and a second spline block being slidably connected inside the first spline column and the second spline column respectively, a limit step being provided on the opposite surfaces of the two spline blocks respectively, a connecting rod coaxially passing through the first spline block and the second spline block, one end of the connecting rod being rotatably passed through the outer wall of the protective shell and fixedly connected to a handle, and a cylindrical cavity being provided inside the second spline column.

[0007] Preferably, the trigger ratchet mechanism further includes a connecting post fixed to one end of the second spline column. Two trigger pawls are symmetrically arranged on the side of the connecting post away from the second spline column, and a trigger ratchet is arranged on the same side and coaxially. The trigger pawls abut against the trigger ratchet through a torsion spring. The connecting post and the trigger ratchet form a unidirectional transmission only through the trigger pawls. A trigger gear is fixed to the side of the trigger ratchet.

[0008] Preferably, the lead screw clamping mechanism further includes a first slide rod and a second slide rod fixed between the two side walls of the support frame. The first slide rod and the second slide rod are both composed of a rectangular body and an arc surface, and the arc surfaces are arranged relatively parallel. Two sliders are slidably connected to the arc surfaces of the two slide rods. The sliders are provided with double U-shaped grooves with opposite openings that slide in cooperation with the corresponding arc surfaces. The rectangular body of the second slide rod has a through lead screw groove inside, and a sliding plate groove communicating with the lead screw groove is provided on the arc surface. The bidirectional lead screw is disposed inside the lead screw groove. The two reverse threaded sections of the bidirectional lead screw are respectively sleeved with sliding sleeves. The outer wall of the sliding sleeve is fixed with a sliding plate. The sliding plate is fixed with the corresponding side slider, thereby converting the rotational motion of the bidirectional lead screw into the synchronous opening and closing of the two sliders along the slide rod. The two sliders are respectively provided with V-shaped grooves on opposite sides. A handle is provided at one end of the bidirectional lead screw.

[0009] Preferably, two fixed rods are provided between the two inner walls of the support frame. One of the fixed rods is rotatably connected to a proximal hook. One end of a steel wire rope is provided inside the rotating shaft. The other end of the steel wire rope passes through the screw clamping mechanism in the open state and is connected to a movable pulley. After passing through the movable pulley and folding back, its rope end is fixed to another fixed rod. One side of the movable pulley is rotatably connected to a distal hook.

[0010] Preferably, the support frame is provided with a main ratchet and a main pawl on its side. The main ratchet is fixed to one end of the rotating shaft and is locked in one direction with the main pawl to prevent the rotating shaft from reversing. A ratchet wrench is fixed to the side of the main ratchet for driving the rotating shaft to tighten the wire.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention adds a secondary protection chain, consisting of a clutch mechanism, a trigger ratchet, and a bidirectional screw clamp, to the existing single ratchet locking mechanism. When the main pawl fails due to wear, vibration, or misoperation, the conductor's rebound force instantly reverses the shaft. The trigger pawl immediately engages the trigger ratchet, transmitting the reversing force to the bidirectional screw with almost no loss. The screw has a small lift angle and high mechanical gain, amplifying the rebound force several times and converting it into a strong clamping force. The V-groove tightens with each pass, and the screw's self-locking mechanism maintains a locked state for a long time, reducing the risk of shaft reversal and conductor fall. During normal tensioning, the trigger pawl only elastically slides on the ratchet's internal teeth, without transmitting torque or increasing operating resistance. The secondary protection chain only activates when the main pawl fails and reversal actually occurs, providing an anti-reversal compensation function that automatically triggers clamping after the main pawl loses its lock, thus improving the safety redundancy of line construction and maintenance. Meanwhile, the clutch mechanism adopts a spline sleeve and slider structure, and the push and pull handle can quickly switch between the engaged and disengaged states. The empty drum can be used to release the rope freely, and the working efficiency is the same as that of existing tools. The entire set of secondary protection components is enclosed by a protective shell, which is dustproof and waterproof, extends the maintenance cycle, and is more suitable for use in outdoor high-altitude environments. Attached Figure Description

[0012] Figure 1 A schematic diagram of the main structure of the conductor tensioner for overhead line construction provided by this utility model; Figure 2 A schematic diagram of the internal structure of the wire tensioner provided by this utility model; Figure 3 Another perspective structural schematic diagram of the internal structure of the wire tensioner provided by this utility model; Figure 4 A schematic diagram of the main structure of the clutch mechanism and the trigger-type ratchet mechanism provided by this utility model; Figure 5 A schematic diagram of the internal structure of the clutch mechanism provided by this utility model; Figure 6 This is a schematic diagram of the trigger-type ratchet mechanism provided by this utility model; Figure 7 This is a schematic diagram of the lead screw clamping mechanism provided by this utility model.

[0013] In the diagram: 1. Support frame; 2. Rotating shaft; 3. Clutch mechanism; 4. Trigger-type ratchet mechanism; 5. Lead screw and gear; 6. Lead screw clamping mechanism; 7. Main ratchet; 8. Main pawl; 9. Ratchet wrench; 10. Protective shell; 11. Steel wire rope; 12. Moving pulley; 13. Distal hook; 14. Fixed rod; 15. Proximal hook; 301. First spline column; 302. Second spline column; 303. Connecting rod; 304. Cylindrical cavity; 305. Handle; 3 031, First spline block; 3032, Second spline block; 3033, Limiting step; 401, Connecting post; 402, Trigger pawl; 403, Torsion spring; 404, Trigger ratchet; 405, Trigger gear; 601, First slide bar; 602, Second slide bar; 603, Two-way lead screw; 604, Slider; 605, Sliding sleeve; 606, Slide plate; 607, V-groove; 608, Throttle; 6021, Lead screw groove; 6022, Slide plate groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-7As shown, a conductor tensioner for overhead line construction includes a support frame 1, and further includes: a rotating shaft 2, rotatably connected between the two inner side walls of the support frame 1, with a steel wire rope drum integrated in its middle; a protective shell 10, fixedly connected to one of the outer side walls of the support frame 1; a main ratchet 7 and a main pawl 8 are provided on the side of the support frame 1, the main ratchet 7 is fixedly connected to one end of the rotating shaft 2 and is unidirectionally locked with the main pawl 8 to prevent the rotating shaft 2 from reversing, and a ratchet wrench 9 is fixedly connected to the side of the main ratchet 7 for driving the rotating shaft 2 to tighten the conductor; two fixing rods 14 are provided between the two inner walls of the support frame 1, one of the fixing rods 14 is rotatably connected to a proximal hook 15; one end of a steel wire rope 11 is provided inside the rotating shaft 2, and the other end of the steel wire rope 11 passes through a screw clamping mechanism 6 in an open state and is connected to a movable pulley 12, and after passing through the movable pulley 12, its rope end is fixed to another fixing rod 14; one end of the movable pulley 12... The lateral swivel connection has a distal hook 13. Under normal working conditions: the operator first fixes the proximal hook 15 to the crossarm and the distal hook 13 to the wire clamp. Then, the operator swings the ratchet wrench 9, causing the main ratchet 7 to drive the rotating shaft 2 to rotate, which in turn drives the wire rope drum to simultaneously wind up the rope. At the same time, the movable pulley 12 moves closer to the proximal hook 15, and the distance between the distal hook 13 and the proximal hook 15 is shortened, thus completing the wire tensioning. After the predetermined winding is completed, the operator stops rotating the ratchet wrench 9. At this time, the main ratchet 7 and the main pawl 8 form a one-way lock. After the wrench is released, the drum automatically maintains the current tension. It should be noted that the back of the main pawl 8 is equipped with a main torsion spring. One end of the main torsion spring abuts against the spring column on the side wall of the support frame 1, and the other end presses against the tail of the main pawl 8, ensuring that the main pawl 8 is always close to the tooth surface of the main ratchet 7. The support frame 1 has a pawl pivot cast at the corresponding position. The main pawl 8 can swing around the pivot to achieve tooth over-reset.

[0016] The clutch mechanism 3 is located inside one side wall of the support frame 1. One side of the clutch mechanism 3 is fixedly connected to one end of the rotating shaft 2. The clutch mechanism 3 includes a first spline column 301 fixedly connected to one end of the rotating shaft 2. A second spline column 302 is coaxially sleeved on the outer side of the first spline column 301. One end of the second spline column 302 is rotatably supported inside the support frame 1. A first spline block 3031 and a second spline block 3032 are slidably connected inside the first spline column 301 and the second spline column 302, respectively. Limiting steps 3033 are respectively provided on the opposite surfaces of the two spline blocks. A connecting rod 303 coaxially passes through the first spline block 3031 and the second spline block 3032. One end of the connecting rod 303 rotatably passes through the outer wall of the protective shell 10 and is fixedly connected to a handle 305. A cylindrical cavity 304 is provided inside the second spline column 302. When rapid wire release or unloading is required, the handle 305 is pulled outward to drive the connecting rod 3031. 3. Sliding synchronously drives the first spline block 3031 and the second spline block 3032 to slide. The limiting step 3033 of the second spline block 3032 disengages from the step groove in the second spline column 302 until the limiting step 3033 of the first spline block 3031 abuts against the step groove in the first spline column 301. At this time, the second spline block 3032 enters the cylindrical cavity 304, and the first spline block 3031 remains in the spline groove of the first spline column 301. The smooth rod section between the first spline block 3031 and the second spline block 3032 enters the spline groove of the second spline column 302. The first spline column 301 and the second spline column 302 lose torque transmission, and the rotating shaft 2 is disconnected from the subsequent transmission chain. Pushing in the handle 305, the two spline blocks re-engage, and torque transmission is restored. Through the one-key clutch design, it is possible to quickly unwind the rope from the empty drum and switch instantly to tension under load. The spline pair has a large load-bearing torque, low engagement impact, and long service life.

[0017] A trigger-type ratchet mechanism 4 is located on the same side as the clutch mechanism 3, including a trigger gear 405. The end of the trigger gear 405 away from the support frame 1 is rotatably supported on the inner wall of the protective shell 10. The trigger-type ratchet mechanism 4 also includes a connecting post 401 fixed to one end of the second spline post 302. Two trigger pawls 402 are symmetrically arranged on the side of the connecting post 401 away from the second spline post 302, and a trigger ratchet 404 is coaxially arranged on the same side. The trigger pawls 402 abut against the trigger ratchet 404 through a torsion spring 403. The connecting post 401 and the trigger ratchet 404 form a unidirectional transmission only through the trigger pawls 402. The trigger gear 405 is fixed to the side of the trigger ratchet 404. When tightening the wire, the clutch mechanism 3 is adjusted to the engaged state. Under normal operating conditions, the arm drive force drives the rotating shaft 2 to rotate forward. At this time, the first spline column 301 rotates forward synchronously, and the connecting column 401 rotates forward together with the second spline column 302. The trigger pawl 402 maintains slight contact with the internal teeth of the trigger ratchet 404 under the action of the torsion spring 403. Since the forward rotation direction is consistent with the back angle of the ratchet, the pawl tip only elastically slides on the surface of the ratchet's internal teeth, and the trigger ratchet 404 is not pushed. The trigger gear 405 remains stationary, the screw clamping mechanism 6 remains open, and the wire rope 11 can pass freely. When the main pawl 8 fails due to vibration, wear, or misoperation, the wire rebound force drives the rotating shaft 2 momentarily. Reversing the rotation, the first spline column 301 rotates synchronously, and the connecting column 401 and the trigger pawl 402 also rotate synchronously. Under the action of the torsion spring 403, the trigger pawl 402 immediately engages the internal teeth of the trigger ratchet 404. At the same time, the trigger ratchet 404 drives the trigger gear 405 to rotate in the opposite direction, forcing the lead screw gear 5 to rotate in reverse, which in turn drives the bidirectional lead screw 603 to rotate synchronously. The two sliding sleeves 605 drive the slide plate 606 to clamp synchronously with the corresponding slider 604, and the V-groove 607 instantly bites the wire rope 11 to achieve safe braking. During normal tensioning, the trigger pawl 402 only slides, and the trigger ratchet 404 remains stationary, with no additional load during operation. The other end of the torsion spring 403 is hung in the spring hole of the connecting column 401. The preload angle is 90°~120°, and the gear engages at a reversal angle of less than 5°, with almost no power loss transmitted to the trigger gear 405. The internal teeth of the trigger ratchet 404 are asymmetrical sawtooth teeth, which allow for smooth sliding in the forward direction without jamming and dedicated force transmission in the reverse direction without additional torque consumption. The main ratchet 7 is responsible for the conventional anti-reverse locking, while the trigger ratchet mechanism 4 only transmits the reverse power and does not lock the shaft 2. It is dedicated to failure triggering. The two perform their respective duties, effectively improving the system's safety redundancy. It should be noted that the preset working configuration of the trigger ratchet mechanism 4 is only activated when the clutch mechanism 3 is engaged and the main pawl 8 fails, causing the shaft 2 to reverse. This ensures that the secondary braking function is accurately triggered and does not interfere with normal tensioning.

[0018] The lead screw clamping mechanism 6 is disposed between the two inner side walls of the support frame 1. It includes a bidirectional lead screw 603, with both ends of the bidirectional lead screw 603 rotatably supported inside the support frame 1 and the protective shell 10, respectively. A lead screw gear 5 is coaxially fixed to one side of the lead screw section, and the lead screw gear 5 meshes with a trigger gear 405. The lead screw clamping mechanism 6 also includes a first slide rod 601 and a second slide rod 602 fixed between the two side walls of the support frame 1. Both the first slide rod 601 and the second slide rod 602 are composed of a rectangular body and an arc surface, with the arc surfaces arranged relatively parallel. Two sliders 604 are slidably connected to the arc surfaces of the two slide rods. Each slider 604 has a double U-shaped groove with opposite openings that slides in cooperation with the corresponding arc surface. The rectangular body of the second slide rod 602 has a through-hole... A lead screw groove 6021 is provided, and a sliding plate groove 6022 communicating with the lead screw groove 6021 is provided on the arc surface. A bidirectional lead screw 603 is disposed inside the lead screw groove 6021. Two reverse threaded sections of the bidirectional lead screw 603 are respectively sleeved with sliding sleeves 605. A sliding plate 606 is fixedly connected to the outer wall of the sliding sleeve 605. The sliding plate 606 is fixedly connected to the corresponding side slider 604, thereby converting the rotational motion of the bidirectional lead screw 603 into the synchronous opening and closing of the two sliders 604 along the slide. The two sliders 604 are respectively provided with V-shaped grooves 607 on opposite sides. A throttle 608 is provided at one end of the bidirectional lead screw 603. When the rotating shaft 2 reverses, the bidirectional lead screw 603 is driven to rotate by the trigger gear 405. At this time, the two sliding sleeves 605 are axially displaced due to opposite rotation directions, which drives the sliding plate 606. The slider 604 slides linearly within the slide groove 6022, thus forcing the slider 604 to align with the arc surfaces of the first slide rod 601 and the second slide rod 602, while the V-groove 607 clamps the wire rope 11. For manual reset, rotating the handle 608 opens the bidirectional lead screw 603, causing the slider 604 to separate in opposite directions, releasing the wire rope 11. The lead screw has a small lift angle, amplifying the rebound force of the wire rope 11 several times, converting it into a strong clamping force. Furthermore, the greater the rebound force, the more the lead screw will clamp the slider, resulting in a greater impact and tighter clamping. It responds quickly to failure, initiating braking with a rotation angle of less than 5°. The lead screw is self-locking, maintaining a locked state for a long time without additional locking mechanisms after clamping. Each rotation of the lead screw precisely moves the slider a corresponding distance, reversing the angle. The clamping force directly corresponds to the clamping degree, allowing for instantaneous locking and precise release upon resetting, avoiding abrupt impacts that could cause sudden locking or collapse. The clamping force also gradually increases with the rotation angle, preventing sudden seizure of the wire rope 11. During normal tensioning, the lead screw and slider 604 act as guide clamps, and the slider clamping degree can be adjusted by rotating the handle 608, providing controllable damping for the wire rope 11. In case of failure, it directly transforms into a brake caliper, eliminating the need for additional components like brakes and cams, resulting in reduced weight and a compact structure. It should be noted that the V-groove 607 of the slider contains replaceable friction pads with fine grooves on the surface, increasing friction and dispersing pressure, preventing noticeable indentations on the surface of the wire rope 11 after clamping. Worn pads can be replaced individually without replacing the entire slider.The width of the slide groove 6022 is larger than that of the slide 606 on one side, which ensures smooth sliding while limiting the lateral bending moment on the lead screw.

[0019] It should be noted that: the protective shell 10 covers the clutch mechanism 3, the trigger ratchet mechanism 4, and the lead screw gear 5, forming a closed cavity that is dustproof and waterproof, reducing the intrusion of mud, sand, and moisture in the field; the connecting rod 303 passes through the cylindrical cavity 304 of the second spline column 302, the connecting column 401, the trigger ratchet 404, and the center hole of the trigger gear 405 in sequence, and then extends out of the outer wall of the protective shell 10 and is fixedly connected to the handle 305. All rotating parts are located inside the shell, with only the handle 305 exposed. There is no need to open the shell during operation, and the maintenance cycle is extended; the throttle 608 is arranged on the same side as the handle 305 on the outside of the protective shell 10, and can be controlled by one hand to clamp or release, and to engage or disengage the clutch. The operating area is concentrated, and there is no need to switch hands when working at height, reducing the risk of falling.

[0020] Working principle: The operator fixes the near-end hook 15 to the crossarm and the far-end hook 13 to the wire clamp. The wire rope 11 passes through the open screw clamping mechanism 6, around the movable pulley 12, and is folded back and fixed to the fixed rod 14, forming a force circuit. The clutch mechanism 3 is confirmed to be in the engaged position, and the first spline block 3031 and the second spline block 3032 are engaged. Then, the ratchet wrench 9 is swung, and the main ratchet 7 drives the rotating shaft 2 and the drum to synchronously wind up the rope. The movable pulley 12 moves forward to complete the wire tensioning. After the wrench is stopped, the main pawl 8 is engaged with the main ratchet 7 under the action of the main torsion spring, and the tension is maintained by one-way locking. During this period, the trigger pawl 402 only slides within the trigger ratchet 404, the trigger gear 405 remains stationary, and the screw clamping mechanism 6 remains open, without interfering with the take-up of the line. When rapid release of the line is required, pull the handle 305 outward, and the connecting rod 303 causes the second spline block 3032 to retract into the cylindrical cavity 304, disengaging the first spline column 301 from the second spline column 302, allowing the rotating shaft 2 to freely reverse and release the rope. Pushing the handle 305 back will restore engagement. If the main pawl 8 fails, the wire rebounds, causing the rotating shaft 2 to reverse, and the connecting column 401 to reverse synchronously. The trigger pawl 402 instantly engages with the trigger ratchet 404, causing the trigger gear 405 to reverse, driving the screw gear 5 and the bidirectional screw 603. The two sliding sleeves 605 move against each other, pushing the slide plate 606. The slider 604 closes along the first slide rod 601 and the second slide rod 602, and the V-groove 607 clamps the wire rope 11. The screw self-locks and remains locked. Rotating the handle 608 can manually reset and release the slider.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover 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 limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conductor tensioner for overhead line construction, comprising a support frame (1), characterized in that, Also includes: The rotating shaft (2) is rotatably connected between the two inner side walls of the support frame (1), and a steel wire rope drum is integrated in the middle of it; The protective shell (10) is fixed to one of the outer side walls of the support frame (1); The clutch mechanism (3) is located inside one side wall of the support frame (1). One side of the clutch mechanism (3) is fixedly connected to one end of the rotating shaft (2), and the other side is coaxially provided with a trigger ratchet mechanism (4). The trigger ratchet mechanism (4) includes a trigger gear (405). The end of the trigger gear (405) away from the support frame (1) is rotatably supported on the inner wall of the protective shell (10). The lead screw clamping mechanism (6) is set between the two inner side walls of the support frame (1), including a bidirectional lead screw (603). The two ends of the bidirectional lead screw (603) are rotatably supported inside the support frame (1) and inside the protective shell (10), respectively, and a lead screw gear (5) is coaxially fixed to one side of the smooth rod section. The lead screw gear (5) is meshed with the trigger gear (405).

2. The conductor tensioner for overhead line construction according to claim 1, characterized in that: The clutch mechanism (3) includes a first spline column (301) fixed to one end of the rotating shaft (2), a second spline column (302) coaxially sleeved on the outside of the first spline column (301), one end of the second spline column (302) being rotatably supported inside the support frame (1), a first spline block (3031) and a second spline block (3032) being slidably connected inside the first spline column (301) and the second spline column (302), respectively, and a limit step (3033) being provided on the opposite surfaces of the two spline blocks, a connecting rod (303) coaxially passing through the first spline block (3031) and the second spline block (3032), one end of the connecting rod (303) being rotatably passed through the outer wall of the protective shell (10) and fixedly connected to a handle (305), and a cylindrical cavity (304) being provided inside the second spline column (302).

3. A conductor tensioner for overhead line construction according to claim 2, characterized in that: The trigger ratchet mechanism (4) further includes a connecting post (401) fixed to one end of the second spline post (302). Two trigger pawls (402) are symmetrically arranged on the side of the connecting post (401) away from the second spline post (302), and a trigger ratchet (404) is arranged on the same side and coaxially. The trigger pawls (402) abut against the trigger ratchet (404) through a torsion spring (403). The connecting post (401) and the trigger ratchet (404) form a unidirectional transmission only through the trigger pawls (402). A trigger gear (405) is fixed to the side of the trigger ratchet (404).

4. A conductor tensioner for overhead line construction according to claim 1, characterized in that: The lead screw clamping mechanism (6) further includes a first slide rod (601) and a second slide rod (602) fixed between the two side walls of the support frame (1). The first slide rod (601) and the second slide rod (602) are both composed of a rectangular body and an arc surface, and the arc surfaces are arranged relatively parallel. The arc surfaces of the two slide rods are slidably connected to two sliders (604). The sliders (604) are provided with double U-shaped grooves with opposite openings that slide in cooperation with the corresponding arc surfaces. The rectangular body of the second slide rod (602) has a through lead screw groove (6021) inside, and a sliding plate communicating with the lead screw groove (6021) is provided on the arc surface. The groove (6022) is provided inside the screw groove (6021). The two reverse threaded sections of the two-way screw (603) are respectively fitted with sliding sleeves (605). The outer wall of the sliding sleeve (605) is fixedly connected with a sliding plate (606). The sliding plate (606) is fixedly connected with the corresponding side slider (604), thereby converting the rotational motion of the two-way screw (603) into the synchronous opening and closing of the two sliders (604) along the sliding rod. The two sliders (604) are respectively provided with V-shaped grooves (607) on opposite sides. A throttle (608) is provided at one end of the two-way screw (603).

5. A conductor tensioner for overhead line construction according to claim 1, characterized in that: Two fixed rods (14) are inserted between the two inner walls of the support frame (1). One of the fixed rods (14) is rotatably connected to a near-end hook (15). One end of a steel wire rope (11) is installed inside the rotating shaft (2). The other end of the steel wire rope (11) passes through the screw clamping mechanism (6) in the open state and is connected to a movable pulley (12). After passing through the movable pulley (12) and folding back, its rope end is fixed to another fixed rod (14). A far-end hook (13) is rotatably connected to one side of the movable pulley (12).

6. A conductor tensioner for overhead line construction according to claim 1, characterized in that: The support frame (1) is provided with a main ratchet (7) and a main pawl (8) on its side. The main ratchet (7) is fixed to one end of the rotating shaft (2) and is locked in one direction with the main pawl (8) to prevent the rotating shaft (2) from reversing. The side of the main ratchet (7) is fixed with a ratchet wrench (9) for driving the rotating shaft (2) to tighten the wire.

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