Overhead transmission conductor tightener

Abstract

The invention discloses an overhead transmission conductor tightener, and relates to the technical field of transmission line erection equipment. The cable winding roller is mounted on the cable tightening frame body and can rotate along the axis of the cable winding roller; the cable winding driving assembly is installed on the cable tightening frame body and comprises a transmission worm gear and a driving worm, the transmission worm gear is in transmission connection with the cable winding roller, the driving worm is meshed with the transmission worm gear, and the driving worm can be in transmission connection with an electric or manual wrench; the first hook assembly is connected to one end of the wire tightening frame body and used for being connected with a tower cross arm; the second hook assembly is used for being connected with a wire clamp; and one end of the connecting sling is fixedly connected with the rope winding roller, the other end of the connecting sling is connected with the second hook assembly, and the connecting sling can be wound on the rope winding roller. The power transmission line can be effectively tightened in the whole stroke, tightening can be driven through an electric tool, the tightening efficiency of the power transmission line is improved, and the tightening labor intensity is reduced.

Description

Technical Field

[0001] This invention relates to the field of power transmission line erection equipment technology, specifically to an overhead power transmission conductor tensioner. Background Technology

[0002] The commonly used overhead line tensioner is a ratchet tensioner, used to tighten conductors during overhead line installation. It requires the use of a wire clamp. During installation, first loosen the steel wire rope or galvanized iron wire on the tensioner, then clamp the wire clamp onto the transmission conductor / use wire clamps to hold the conductor in place. Secure the tensioner to the crossarm of the pole or tower, then turn the wrench. Due to the anti-reverse action of the ratchet pawl, the steel wire rope or galvanized iron wire gradually winds around the ratchet drum, tightening the transmission conductor. Then, secure the tightened conductor to the insulator. Finally, release the ratchet pawl to loosen the steel wire rope or galvanized iron wire, and then release the wire clamp / wire clamp to complete the installation.

[0003] When tightening power transmission lines, to ensure sufficient torque on the ratchet roller, a ratchet wrench or lever with a wheel is typically used to manually drive the ratchet roller to rotate, thus tightening the transmission lines. However, during manual tightening, the wrench is only driven by the pawl during the downward stroke, and the pawl slips during the upward stroke (return stroke). Therefore, only half of the stroke and time in an operation cycle is effectively tightened. Furthermore, the required winding stroke is long when erecting transmission lines, resulting in low tightening efficiency and high labor intensity. Summary of the Invention

[0004] To address the technical problem of idle travel in existing overhead line tensioners, this invention provides an overhead transmission line tensioner that can effectively tighten the transmission line throughout its entire travel. Furthermore, the tightening can be driven by power tools, thereby improving the tightening efficiency of overhead transmission lines and reducing the labor intensity of tightening them.

[0005] This invention is achieved through the following technical solution:

[0006] This invention provides an overhead transmission line tensioner, comprising: a tensioning frame; a cable reel mounted on the tensioning frame and capable of rotating along its own axis; a cable reel drive assembly mounted on the tensioning frame, comprising a transmission worm gear and a drive worm, wherein the transmission worm gear is drively connected to the cable reel, the drive worm meshes with the transmission worm gear, and the drive worm can be drively connected to an electric or manual wrench; a first hook assembly connected to one end of the tensioning frame for connecting to a tower crossarm; a second hook assembly for connecting a cable clamp; and a connecting sling, one end of which is fixedly connected to the cable reel and the other end of which is connected to the second hook assembly and capable of being wound around the cable reel.

[0007] The overhead power transmission line tensioner provided by this invention includes a tensioning frame, a winding drum, a winding drive assembly, a first hook assembly, a second hook assembly, and a connecting sling. The connecting sling is wound around the winding drum, with one end fixedly connected to the winding drum and the other end connected to the second hook assembly. In use, the tensioner is connected to the second hook assembly and then to the power transmission line that needs to be tensioned. The first hook assembly is connected to the crossarm of the pole to complete the connection of the tensioner. Since the winding drive assembly includes a transmission worm gear and a drive worm, the transmission worm gear is connected to the winding drum, and the drive worm meshes with the transmission worm gear. By utilizing the torque amplification characteristics of the worm gear mechanism, a large torque output is achieved with a small torque input, thereby achieving the winding of the winding drum with less effort and achieving the purpose of tightening the overhead power transmission line.

[0008] The worm gear mechanism's self-locking characteristic prevents the cable rewinding drum from reversing. Furthermore, the worm drives the worm wheel to rotate, which in turn drives the cable rewinding drum to wind up the connecting sling. This allows for full-stroke winding of the connecting sling without any idle stroke, thus reducing the labor intensity of winding the connecting sling and improving its efficiency.

[0009] In addition, the drive worm gear is easy to connect with electric and manual wrench drives, and can be driven manually or tightened by electric tools, so as to further improve the tightening efficiency of overhead transmission lines and reduce the labor intensity of tightening transmission lines.

[0010] In summary, the overhead transmission line tensioner provided by this invention can effectively tighten the transmission line throughout its entire stroke, and can be driven by power tools to improve the tightening efficiency of overhead transmission lines and reduce the labor intensity of tightening transmission lines.

[0011] In an optional embodiment of this application, the cable drum is equipped with a first return spring, which stores energy during the rotation of the cable drum driven by the connecting sling; the transmission worm gear is connected to the cable drum via a transmission ratchet, the transmission ratchet slips when the cable drum is driven to rotate by the first return spring, and the reverse rotation limitation of the cable drum by the transmission ratchet can be released.

[0012] The cable reel is connected to the worm gear drive via a transmission ratchet mechanism, enabling automatic anti-reverse rotation. This ensures the reliability of the cable reel's unidirectional rotation while avoiding impact loads on the worm gear mechanism, reducing wear and extending its service life. The ratchet mechanism can release the reverse rotation restriction on the cable reel, disconnecting the transmission connection between the cable reel and the worm gear mechanism, allowing for rapid release of the connecting cable. The cable reel is equipped with a first return spring, enabling real-time tightening of the connecting cable to ensure it remains taut and prevents it from becoming entangled or stuck in the gap between the cable reel and the tensioning frame when being pulled.

[0013] In an optional embodiment of this application, the transmission worm gear is provided with a worm gear shaft, which passes through the tensioning frame and is rotatable about its own axis; the two ends of the winding drum are respectively provided with a first connecting shaft and a second connecting shaft on the same axis, the first connecting shaft is inserted into the transmission worm gear, the first connecting shaft is coaxial with the transmission worm gear and is rotatable relative to the transmission worm gear along its own axis, and the second connecting shaft passes through the tensioning frame; the end of the winding drum facing the transmission worm gear is provided with a transmission ratchet, the transmission ratchet is coaxial with and fixedly connected to the winding drum, and is adapted to the transmission ratchet tooth, so as to realize the releasable ratchet mechanism transmission connection between the transmission worm gear and the winding drum.

[0014] In an optional embodiment of this application, the tensioning frame is provided with a reversing support wheel, which can rotate around its own axis; the second hook assembly includes a hook frame and a reversing pulley, the hook frame is fixedly connected to one end of the connecting sling, the reversing pulley is mounted on the hook frame and can rotate along its own axis; the middle part of the connecting sling is stretched on the reversing support wheel and the reversing pulley, so that the reversing pulley and the reversing support wheel and the connecting sling form a movable pulley mechanism that can save two-thirds of the effort (ignoring friction and the weight of the pulley itself), so as to further reduce the torque required to tighten the power transmission line and ensure that the electric wrench and the hand crank can drive the tensioner to tighten the power transmission line to the set arc.

[0015] In an optional embodiment of this application, the connecting sling is a ribbon-insulated body to ensure that the connecting sling has sufficient tensile strength and sufficient flexibility to fit well onto the reversing support wheel and the reversing pulley.

[0016] In an optional embodiment of this application, it further includes: a cable reel adapted with a third connecting shaft and a second return spring, the third connecting shaft being mounted on the tensioning frame and detachably connected to the tensioning frame, the cable reel being rotatable around the third connecting shaft; a connecting joint movably latched outside the cable reel and detachably connected to the third connecting shaft and the tensioning frame; the connecting sling includes a first connecting section and a second connecting section, one end of the first connecting section being connected to the hook frame, the middle portion being stretched on the reversing pulley, and the other end being wound around the cable reel and fixed, one end of the second connecting section being wound around the cable drum and fixed, the middle portion being stretched on the reversing pulley, and the other end being connected to the connecting joint.

[0017] Therefore, in the initial winding stage where the required torque is relatively small (the angle between the tightening force and the vertical direction increases as the transmission line tightens, making the vertical component of the tightening force smaller; thus, as the transmission line tightens, the required tightening force increases accordingly), the connecting joint is connected to the tensioning frame, so that the reversing pulley and the connecting sling form a movable pulley mechanism that can save half the effort (ignoring friction and the pulley's own weight). This reduces the required winding length of the connecting sling while saving effort, thereby improving the tightening efficiency of the transmission line. During this process, since the cable reel is equipped with a second return spring and can rotate around the third connecting shaft, the first connecting section is automatically wound synchronously and automatically through the return force of the second return spring during the tightening of the transmission line and the movement of the reversing pulley towards the reversing support wheel, ensuring that the connecting sling is always in a taut state.

[0018] In the later stages of tightening, the connecting joint is connected to the cable reel, and the connection between the connecting joint and the cable reel and the tensioning frame is disconnected, so that the cable reel is in a state where it can move relative to the tensioning frame but cannot rotate, so as to connect the first connecting section and the second connecting section into a whole. This allows the reversing pulley and the reversing support wheel to form a movable pulley mechanism with the connecting sling that can save two-thirds of the effort (ignoring friction and the weight of the pulley itself), ensuring that the tensioner outputs sufficient tensioning force under small torque input.

[0019] In an optional embodiment of this application, the third connecting shaft is inserted into the body of the cable reel and is movable along the axial direction of the cable reel; wherein, the third connecting shaft is defined on the cable reel, and both ends of the third connecting shaft in the length direction are movable to a state that protrudes from the corresponding side of the cable reel, so as to ensure that the third connecting shaft can be detachably connected to the tensioning frame and the connecting joint.

[0020] In an optional embodiment of this application, the connecting joint includes: a connecting frame with a snap-fit ​​hole in the middle, the snap-fit ​​hole being sleeved on the outer end of the third connecting shaft corresponding to it; a limiting lever, disposed at one end of the connecting frame along its length and snapped onto the outer side of the first connecting segment; a limiting sleeve, fixed on the connecting frame and fitted with a removable limiting pin, the limiting pin being able to be inserted into the coil body of the winding reel; and a connecting cylinder, fixed at the other end of the connecting frame along its length and fitted with a removable positioning pin, the positioning pin being able to be inserted into the tensioning frame body, the connecting cylinder being used to connect the second connecting segment; wherein, when the middle part of the third connecting shaft moves into the snap-fit ​​hole, the third connecting shaft is snapped onto the connecting frame to ensure that the connecting joint can be detachably connected to the third connecting shaft and the tensioning frame body.

[0021] In an optional embodiment of this application, the end face of the cable reel facing the connecting frame is provided with a plurality of limiting holes, the limiting holes being adapted to the limiting pins, and the plurality of limiting holes being evenly distributed around a concentric circle with the third connecting shaft, so as to ensure that the connecting joint can limit the rotation of the cable reel when connected to the cable reel, and also to facilitate the connection of the connecting joint to the cable reel.

[0022] In an optional embodiment of this application, a guide wheel is adapted to the limiting clamp rod. The guide wheel is capable of rotating around its own axis so that the friction between the connecting sling and the limiting clamp rod is rolling friction, thereby reducing the wear of the connecting sling.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0024] 1. The overhead transmission line tensioner provided by this invention includes a tensioning frame, a winding drum, a winding drive assembly, a first hook assembly, a second hook assembly, and a connecting sling. The connecting sling is wound on the winding drum, with one end fixedly connected to the winding drum and the other end connected to the second hook assembly. Since the winding drive assembly includes a transmission worm gear and a drive worm, the transmission worm gear is connected to the winding drum, and the drive worm meshes with the transmission worm gear. By utilizing the torque amplification characteristics of the worm gear mechanism, a large torque output is achieved with a small torque input, thereby saving effort in winding the winding drum and achieving the purpose of tightening the overhead transmission line. Through the characteristics of the worm gear transmission mechanism, reverse rotation of the winding drum can be prevented, and the connecting sling can be wound up throughout the entire stroke. There is no idle stroke, which can reduce the labor intensity of winding the connecting sling and improve the efficiency of winding the connecting sling.

[0025] 2. The overhead transmission line tensioner provided by the present invention has a drive worm gear that can be connected to both electric and manual wrenches. It can be driven manually or driven by an electric tool to tighten the transmission line, thereby further improving the tightening efficiency of the overhead transmission line and reducing the labor intensity of tightening the transmission line. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] In the attached diagram:

[0028] Figure 1 This is a schematic diagram of the overhead line tensioning device provided in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the overhead line tensioning device provided in an embodiment of the present invention after removing one side plate of the tensioning frame and the cable winding drive assembly;

[0030] Figure 3 A cross-sectional view of the connection structure between the cable winding drum and the transmission worm gear of the overhead line tensioning device provided in an embodiment of the present invention;

[0031] Figure 4 for Figure 2 Enlarged schematic diagram of part A;

[0032] Figure 5 This is a cross-sectional view of the connection structure between the cable reel and the connecting joint provided in an embodiment of the present invention.

[0033] The attached diagram shows the markings and corresponding component names:

[0034] 10-Tightening frame body; 11-Reversing support roller;

[0035] 20-Roller roller, 21-First return spring, 22-First connecting shaft, 23-Second connecting shaft, 24-Transmission ratchet;

[0036] 30 - worm gear for transmission; 31 - ratchet for transmission; 32 - worm gear shaft;

[0037] 40 - Drive worm gear;

[0038] 50 - First hook assembly;

[0039] 60 - Second hook assembly, 61 - Hook frame, 62 - Reversing pulley

[0040] 70 - Connecting sling, 71 - First connecting section, 72 - Second connecting section;

[0041] 80-Rope reel, 81-Third connecting shaft, 82-Second reset spring, 83-Limiting hole;

[0042] 90-Connecting connector, 91-Connecting bracket, 92-Limiting lever, 94-Limiting pin, 95-Connecting cylinder, 96-Positioning pin, 97-Guide wheel. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that similar reference numerals and letters in the following drawings indicate similar items. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0045] Meanwhile, the terms "set up," "open," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Example

[0047] Combination Figures 1-3 This embodiment provides an overhead transmission line tensioner, comprising: a tensioning frame 10; a cable reel 20, mounted on the tensioning frame 10 and capable of rotating along its own axis; a cable reel drive assembly, mounted on the tensioning frame 10, including a transmission worm gear 30 and a drive worm 40, wherein the transmission worm gear 30 is drively connected to the cable reel 20, the drive worm 40 meshes with the transmission worm gear 30, and the drive worm 40 can be drively connected to an electric or manual wrench; a first hook assembly 50, connected to one end of the tensioning frame 10, for connecting a tower crossarm; a second hook assembly 60, for connecting a wire clamp; and a connecting sling 70, one end of which is fixedly connected to the cable reel 20 and the other end of which is connected to the second hook assembly 60, and capable of being wound around the cable reel 20.

[0048] Generally, the tensioning frame 10 is composed of two parallel, spaced-apart metal plates connected by several fixed crossbars. This ensures sufficient structural strength for the tensioning frame 10 while facilitating the installation of the cable winding drum 20 and the cable winding drive assembly. In this embodiment, the cable winding drum is installed between the two metal plates, while the cable winding drive assembly is installed on the outside of one of the metal plates.

[0049] Combination Figure 3 The cable drum 20 is equipped with a first return spring 21, which stores energy during the rotation of the cable drum 20 driven by the connecting sling 70. The transmission worm gear 30 is connected to the cable drum 20 via a transmission ratchet 31. The transmission ratchet 31 slips when the cable drum 20 is driven to rotate by the first return spring 21, and the reverse rotation restriction of the cable drum 20 by the transmission ratchet 31 can be released.

[0050] Understandably, the cable reel 20 is connected to the transmission worm gear 30 via the transmission ratchet 24 mechanism, enabling automatic anti-reverse rotation of the cable reel 20. This ensures the reliability of the cable reel 20's unidirectional rotation while avoiding impact loads on the worm gear mechanism, reducing wear and extending its service life. The transmission ratchet 31 can release the reverse rotation restriction on the cable reel 20. In this released state, the transmission connection between the cable reel 20 and the worm gear mechanism is disconnected, allowing the cable reel 20 to quickly release the connecting cable 70. The cable reel 20 is equipped with a first return spring 21, which allows the cable reel 20 to tighten the connecting cable 70 in real time, ensuring that the connecting cable 70 is always taut and preventing it from becoming entangled or stuck in the gap between the cable reel 20 and the tensioning frame 10 when being pulled.

[0051] Combination Figure 3 The transmission worm gear 30 is provided with a worm gear shaft 32, which passes through the tensioning frame 10 and can rotate around its own axis. The winding drum 20 has a first connecting shaft 22 and a second connecting shaft 23 coaxially arranged at both ends. The first connecting shaft 22 is inserted into the transmission worm gear 30 and is coaxial with the transmission worm gear 30, and can rotate relative to the transmission worm gear 30 along its own axis. The second connecting shaft 23 passes through the tensioning frame 10. The winding drum 20 has a transmission ratchet 24 at one end facing the transmission worm gear 30. The transmission ratchet 24 is coaxial with the winding drum 20 and fixedly connected, and is adapted to the transmission ratchet 31 to realize a disengageable ratchet mechanism transmission connection between the transmission worm gear 30 and the winding drum 20.

[0052] Specifically, the worm gear shaft 32 is mounted on the tensioning frame 10 via a connecting bearing; the first connecting shaft 22 is fixedly connected to the cable reel 20 and mounted on the transmission worm gear 30 via a connecting bearing; and the second connecting shaft 23 is fixedly mounted on the tensioning frame 10 at one end and on the cable reel 20 at the other end via a connecting bearing, so that the cable reel 20 can rotate along its own axis and, when the transmission ratchet 31 is unlocked, can rotate relative to the transmission worm gear 30. Simultaneously, one end of the first return spring 21 is fixedly connected to the second connecting shaft 23 and the other end is fixedly connected to the cable reel 20, and it tightens during the reverse rotation of the cable reel 20 (during the loosening of the connecting cable 70).

[0053] The transmission ratchet 31 is usually installed via a limiting connecting block, which is detachably inserted into the transmission worm gear 30 to release the restriction of the transmission ratchet 31 on the transmission ratchet 24. At the same time, a limiting stop protrusion is provided on the limiting connecting block so that the transmission ratchet 31 can rotate away from the transmission ratchet 24 but cannot rotate towards the transmission ratchet 24, thereby playing a role in preventing reverse rotation. The transmission ratchet 31 is also equipped with a torsion spring to ensure that the transmission ratchet 31 can abut against the side wall of the transmission ratchet 24.

[0054] Combined again Figure 2 The tensioning frame 10 is provided with a reversing support wheel 11, which can rotate around its own axis; the second hook assembly 60 includes a hook frame 61 and a reversing pulley 62. The hook frame 61 is fixedly connected to one end of the connecting sling 70, and the reversing pulley 62 is mounted on the hook frame 61 and can rotate along its own axis; the middle part of the connecting sling 70 is stretched on the reversing support wheel 11 and the reversing pulley 62, so that the reversing pulley 62 and the reversing support wheel 11 and the connecting sling 70 form a movable pulley mechanism that can save two-thirds of the effort (ignoring friction and the weight of the pulley itself), so as to further reduce the torque required to tighten the power transmission line and ensure that the electric wrench and the hand crank can drive the tensioner to tighten the power transmission line to the set arc.

[0055] In this embodiment, the connecting sling 70 is a ribbon-insulated body to ensure that the connecting sling 70 has sufficient tensile strength and sufficient flexibility, so that it can fit well on the reversing support wheel 11 and the reversing pulley 62.

[0056] Combination Figure 2 and Figure 4This embodiment also includes: a cable reel 80, adapted with a third connecting shaft 81 and a second return spring 82, the third connecting shaft 81 being mounted on the tensioning frame 10 and detachably connected to the tensioning frame 10, the cable reel 80 being rotatable around the third connecting shaft 81; a connecting joint 90, movably latched outside the cable reel 80, and detachably connected to the third connecting shaft 81 and the tensioning frame 10; the connecting sling 70 includes a first connecting section 71 and a second connecting section 72, one end of the first connecting section 71 being connected to the hook frame 61, the middle portion being stretched on the reversing support wheel 11, and the other end being wound around the cable reel 80 and fixed, one end of the second connecting section 72 being wound around the cable drum 20 and fixed, the middle portion being stretched on the reversing pulley 62, and the other end being connected to the connecting joint 90.

[0057] Therefore, in the initial winding stage where the required torque is relatively small (the angle between the tightening force and the vertical direction increases as the transmission line is tightened, making the vertical component of the tightening force smaller, so as the transmission line is tightened, the required tightening force increases accordingly), the connecting joint 90 is connected to the tensioning frame 10, so that the reversing pulley 62 and the connecting sling 70 form a movable pulley mechanism that can save half the effort (ignoring friction and the pulley's own weight), so as to reduce the required winding length of the connecting sling 70 while taking into account the effort saving, thereby improving the tightening efficiency of the transmission line. In this process, since the winding reel 80 is equipped with a second return spring 82 and can rotate around the third connecting shaft 81, during the tightening of the transmission line and the movement of the reversing pulley 62 toward the reversing support wheel 11, the first connecting section 71 is automatically wound synchronously by the return force of the second return spring 82, ensuring that the connecting sling 70 is always in a taut state.

[0058] In the later stage of tightening, the connecting joint 90 is connected to the cable reel 80, and the connection between the connecting joint 90 and the cable reel 80 and the tensioning frame 10 is disconnected, so that the cable reel 80 is in a state that can move relative to the tensioning frame 10 but cannot rotate, so as to connect the first connecting section 71 and the second connecting section 72 into a whole, thereby making the reversing pulley 62 and the reversing support wheel 11 and the connecting sling 70 form a moving pulley mechanism that can save two-thirds of the effort (ignoring friction and the weight of the pulley itself), ensuring that the tensioner outputs sufficient tensioning force under small torque input.

[0059] Combination Figure 5The third connecting shaft 81 is inserted into the body of the cable reel 80 and is movable along the axial direction of the cable reel 80. The third connecting shaft 81 is confined to the cable reel 80, and both ends of the third connecting shaft 81 in the length direction can move to protrude from the corresponding side of the cable reel 80, ensuring that the third connecting shaft 81 can be detachably connected to the tensioning frame 10 and the connecting joint 90. Simultaneously, a locking groove is provided in the middle of the third connecting shaft 81, and one end of the second return spring 82 is slidably locked into the locking groove (the other end is connected to the cable reel 80 body), ensuring that the third connecting shaft 81 can move relative to the second return spring 82 along its own axial direction while locking the second return spring 82.

[0060] It should be noted that the connecting joint 90 includes: a connecting frame 91 with a snap-fit ​​hole in the middle, the snap-fit ​​hole being sleeved on the corresponding end of the third connecting shaft 81; a limiting clamping rod 92, disposed at one end of the connecting frame 91 along its length and snapped onto the outside of the first connecting section 71; a limiting sleeve, fixed to the connecting frame 91 and fitted with a removable limiting pin 94, the limiting pin 94 being able to be inserted into the disc body of the winding reel 80; and a connecting cylinder 95, fixed to the other end of the connecting frame 91 along its length and fitted with a removable limiting pin 94. The positioning pin 96 is pulled out and can be inserted into the tensioning frame 10. The connecting cylinder 95 is used to connect the second connecting section 72. When the middle part of the third connecting shaft 81 moves into the snap-fit ​​hole, the third connecting shaft 81 snaps into the connecting frame 91 (the third connecting shaft 81 is a stepped shaft, a limiting protrusion is provided in the middle part of the third connecting shaft 81, and a corresponding limiting groove is provided on the side wall of the snap-fit ​​hole), to ensure that the connecting joint 90 can be detachably connected to the third connecting shaft 81 and the tensioning frame 10.

[0061] It should be understood that the cable reel 80 is provided with a plurality of limiting holes 83 on one end face of the connecting frame 91. The limiting holes 83 are adapted to the limiting pin 94, and the plurality of limiting holes 83 are evenly distributed around a concentric circle with the third connecting shaft 81 to ensure that the connecting joint 90 can limit the rotation of the cable reel 80 when connected to it, and also to facilitate the connection of the connecting joint 90 to the cable reel 80.

[0062] The limiting lever 92 is equipped with a guide wheel 97, which can rotate around its own axis so that the friction between the connecting cable 70 and the limiting lever 92 is rolling friction, thereby reducing the wear of the connecting cable 70.

[0063] In summary, the overhead transmission line tensioner provided in this embodiment includes a tensioning frame 10, a cable reel 20, a cable drive assembly, a first hook assembly 50, a second hook assembly 60, a connecting sling 70, a cable reel 80, and a connecting connector 90. The operation steps for tensioning the line using it are as follows:

[0064] S10. Insert the third connecting shaft 81 and the positioning pin 96 into the tensioning frame 10, and remove the limiting pin 94 from the cable reel 80 to connect the connecting joint 90 to the tensioning frame 10. This allows the reversing pulley 62 and the connecting cable 70 to form a movable pulley mechanism that can save half the effort. This reduces the required winding length of the connecting cable 70 while saving effort. The cable reel 80 can rotate around the third connecting shaft 81, allowing the second reset spring 82 to automatically wind up the slack first connecting section 71.

[0065] S20. Engage the transmission ratchet 31 to release the restriction of the transmission ratchet 31 on the transmission ratchet 24.

[0066] S30. Connect the wire clamp to the second hook assembly 60 and to the power transmission line that needs to be tensioned. Connect the first hook assembly 50 to the pole crossarm to complete the connection of the wire tensioner. During the connection process, the first connecting section 71 and the second connecting section 72 are automatically pulled by the hook frame 61 to pull out the corresponding length and tension.

[0067] S40, reset the transmission ratchet 31 to prevent the transmission ratchet 24 from reversing.

[0068] S50. Connect the hand crank or electric wrench to the drive of the drive worm gear 40 to drive the winding drum 20 to wind up the second connecting section 72.

[0069] Specifically, since the cable reel 80 is equipped with a second reset spring 82 and can rotate around the third connecting shaft 81, during the process of tightening the power transmission line and moving the reversing pulley 62 toward the reversing support wheel 11, the first connecting section 71 is automatically wound up synchronously by the pull force of the second reset spring 82, ensuring that the connecting cable 70 is always in a taut state.

[0070] Because the transmission worm gear 30 is connected to the winding drum 20 and the drive worm 40 meshes with the transmission worm gear 30, the torque amplification characteristics of the worm gear mechanism are utilized. In addition, the reversing pulley 62 and the connecting sling 70 form a movable pulley mechanism that can save half the effort. A large torque output can be achieved with a small torque input, thereby saving effort to wind up the winding drum 20 and achieving the purpose of tightening the overhead power transmission line.

[0071] S60. When the curvature of the transmission line is close to the design value, insert the limit pin 94 into the limit hole 83 on the winding reel 80 (the limit pin 94 can be aligned with the limit hole 83 by rotating the winding reel 80 at a certain angle).

[0072] S70. Push or pull the third connecting shaft 81 to disconnect the connection between the third connecting shaft 81 and the tensioning frame 10, and snap the third connecting shaft 81 onto the connecting frame 91 to connect the connecting joint 90 to the cable reel 80, thereby locking the cable reel 80 so that it cannot rotate, so as to connect the first connecting section 71 and the second connecting section 72 into a whole (the tension between the first connecting section 71 and the second connecting section 72 is transmitted through the connecting frame 91, at which time the force on the third connecting shaft 81 is very small, and it can be pulled out from the tensioning frame 10). Thus, the reversing pulley 62 and the reversing support wheel 11 and the connecting sling 70 form a movable pulley mechanism that can save two-thirds of the effort (ignoring friction and the weight of the pulley itself), ensuring that the tensioner outputs sufficient tension force under small torque input.

[0073] Finally, the drive worm gear 40 is rotated again by hand crank or electric wrench to drive the winding drum 20 to wind up the second connecting section 72.

[0074] The worm gear drives the worm wheel to rotate, which in turn drives the cable reel 20 to wind up the connecting cable 70. This allows for full-stroke winding of the connecting cable 70 without any idle stroke, thus reducing the labor intensity of winding up the connecting cable 70 and improving its efficiency.

[0075] In addition, the drive worm gear 40 is easy to connect with electric and manual wrench drives, and can be driven manually or tightened by electric tools, so as to further improve the tightening efficiency of overhead transmission lines and reduce the labor intensity of tightening transmission lines.

[0076] In summary, the overhead transmission line tensioner provided in this embodiment can effectively tighten the transmission line throughout its entire stroke. It can also be driven by power tools to improve the tightening efficiency of the overhead transmission line and reduce the labor intensity of tightening the transmission line. Furthermore, it can change the force transmission mechanism according to the tightening state to balance labor saving and tightening efficiency.

[0077] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An overhead power transmission conductor tension Wire device, characterized in that Comprise: The tight frame body (10); The cable drum (20) is installed on the tight frame body (10), can rotate along the own axis; Cable drum drive assembly, installed on the tight frame body (10), including transmission worm (30) and drive worm (40), the transmission worm (30) is transmission connection with the cable drum (20), the drive worm (40) is engaged with the transmission worm (30), and the drive worm (40) can be transmission connection with electric or hand wrench; The first hook assembly (50) is connected in one end of the tight frame body (10), is used for connecting the tower cross arm; Second hook assembly (60) is used for connecting the wire clamp; The connecting sling (70) is fixedly connected with the cable drum (20) on one end, is connected with the second hook assembly (60) on the other end, and can be wound on the cable drum (20).

2. The overhead power conductor line strainer of claim 1, wherein, The cable drum (20) is adapted with first reset coil spring (21), the first reset coil spring (21) in the connecting sling (70) drive the cable drum (20) rotates in the process of energy storage; The transmission worm (30) is transmission connection with the cable drum (20) through transmission ratchet (31), the transmission ratchet (31) slips in the first reset coil spring (21) drive the cable drum (20) rotates, and the transmission ratchet (31) to the cable drum (20) reverse limitation can be removed.

3. The overhead power conductor line strainer of claim 2 wherein, The transmission worm (30) is provided with worm shaft (32), the worm shaft (32) is inserted in the tight frame body (10), and can rotate around the own axis; The cable drum (20) both ends are coaxially provided with first connecting shaft (22) and second connecting shaft (23) respectively, the first connecting shaft (22) is inserted in the transmission worm (30), the first connecting shaft (22) is coaxially arranged with the transmission worm (30), and can rotate along the own axis relative to the transmission worm (30), the second connecting shaft (23) is inserted in the tight frame body (10); The cable drum (20) is provided with transmission ratchet (24) in one end opposite the transmission worm (30), the transmission ratchet (24) is coaxial with the cable drum (20) and fixedly connected, and is adapted with the transmission ratchet (31).

4. The overhead power conductor line strainer of claim 1 wherein, The tight frame body (10) is provided with reversing support wheel (11), the reversing support wheel (11) can rotate around the own axis; The second hook assembly (60) includes hook frame body (61) and reversing pulley (62), the hook frame body (61) is fixedly connected with one end of the connecting sling (70), the reversing pulley (62) is installed on the hook frame body (61), and the reversing pulley (62) can rotate along the own axis; The middle part of the connecting sling (70) is arranged on the reversing support wheel (11) and the reversing pulley (62).

5. The overhead power conductor line strainer of claim 4 wherein, The connecting sling (70) is a wire belt body.

6. The overhead power transmission conductor of claim 5 The tight line device, characterized in that, Also include: The winding drum (80) is adapted with a third connecting shaft (81) and a second reset winding spring (82), the third connecting shaft (81) is installed on the tight line frame body (10) and detachably connected with the tight line frame body (10), and the winding drum (80) can rotate around the third connecting shaft (81); The connecting joint (90) is movably clamped outside the winding drum (80) and detachably connected with the third connecting shaft (81) and the tight line frame body (10); The connecting sling (70) comprises a first connecting section (71) and a second connecting section (72), one end of the first connecting section (71) is connected with the hook frame body (61), the middle part is arranged on the reversing support wheel (11), the other end is arranged on the winding drum (80) and fixed, one end of the second connecting section (72) is arranged on the winding drum (20) and fixed, the middle part is arranged on the reversing pulley (62), and the other end is connected with the connecting joint (90).

7. The overhead power conductor line tightener of claim 6 wherein, The third connecting shaft (81) is inserted into the disc body of the winding drum (80) and can move along the axial direction of the winding drum (80); Wherein, the third connecting shaft (81) is defined on the winding drum (80), and both ends of the third connecting shaft (81) in the length direction can be moved to the state of protruding from the corresponding side of the winding drum (80).

8. The overhead power line tightener of claim 7, wherein, The connecting joint (90) comprises: The connecting frame (91) is provided with a clamping hole in the middle, and the clamping hole is sleeved outside the corresponding end of the third connecting shaft (81); The limiting rod (92) is arranged at one end of the connecting frame (91) in the length direction and clamped outside the first connecting section (71); The limiting sleeve is fixed on the connecting frame (91) and is adapted with a pluggable limiting pin (94), the limiting pin (94) can be inserted into the disc body of the winding drum (80); The connecting barrel (95) is fixed at the other end of the connecting frame (91) in the length direction and is adapted with a pluggable positioning pin (96), the positioning pin (96) can be inserted into the tight line frame body (10), and the connecting barrel (95) is used for connecting the second connecting section (72); Wherein, when the middle part of the third connecting shaft (81) moves into the clamping hole, the third connecting shaft (81) is clamped with the connecting frame (91).

9. The overhead power line tightener of claim 8, wherein, The winding drum (80) is provided with a plurality of limiting holes (83) on the end face opposite to the connecting frame (91), the limiting holes (83) are adapted with the limiting pins (94), and a plurality of limiting holes (83) are evenly distributed around the concentric circle of the third connecting shaft (81).

10. The overhead power transmission conductor of claim 8 A line tightener, characterized in that The limiting rod (92) is adapted with a guide wheel (97) outside, and the guide wheel (97) can rotate around its own axis.

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