Overhead power transmission line ground wire laying device for non-spanning iron tower construction

Abstract

The invention relates to the field of overhead power transmission lines, and discloses an overhead power transmission line ground wire unwinding device for non-spanning iron tower construction, which comprises an unwinding pulley and two suspension brackets for suspending the pulley, and further comprises a detection roller which is arranged below a ground wire at one side of the unwinding pulley and is used for detecting the tension change of the ground wire, when the tension of the ground wire is reduced, the detection roller moves downwards under the gravity action of the drooping ground wire; and the clamping seat is installed between the two suspension brackets and located above the pay-off pulley, and the clamping seat can vertically move along the suspension brackets. According to the invention, the detection roller is arranged below the ground wire, drooping or rising caused by tension change of the ground wire is utilized to drive the detection roller to move, and the state that the ground wire is separated from traction constraint is captured in real time. And the displacement of the detection roller is quickly transmitted through the linkage mechanism, so that the tension abnormity of the ground wire can be sensed in time, and the falling risk of the ground wire can be identified timely and accurately.

Description

Technical Field

[0001] This invention relates to the field of overhead transmission lines, and more particularly to a conductor and ground wire laying device for overhead transmission lines used in construction without crossing towers. Background Technology

[0002] In the construction of overhead transmission lines without crossing towers, the laying of conductors and ground wires is a core step in ensuring the quality of line erection and construction safety. The laying pulley, as a key support and guiding device, supports the conductors and ground wires by rolling pulleys, converting sliding friction into rolling friction to reduce traction resistance, and guiding the conductors and ground wires to move along a preset path. This effectively avoids wear caused by direct contact between the conductors and ground wires and the tower structure or crossing objects, and is an important piece of equipment to ensure laying efficiency and the integrity of the conductors and ground wires.

[0003] A search revealed that CN217388043U discloses an automatically locking overhead transmission line conductor and ground wire deployment trolley, belonging to the field of deployment trolley technology. It includes a lifting beam, a first guard plate, and a second guard plate. The lower part of the first guard plate has the same shape as the second guard plate. A row of nylon wheels is arranged between the lower part of the first guard plate and the second guard plate. The nylon wheels are rotatably connected to a rotating shaft via one-way bearings. Both ends of the rotating shaft are fixedly connected to the first guard plate and the second guard plate, respectively. The lifting beam is positioned above the first and second guard plates. The lower end of the lifting beam is fixedly connected to the first guard plate via a connecting rod. A sealing door is hinged to the upper end of the second guard plate, and a locking mechanism that cooperates with the connecting rod is provided at the upper end of the sealing door.

[0004] The connection point between the conductor and the traction wire is a critical stress-bearing component during the deployment process. It is susceptible to detachment due to insufficient connection strength, long-term wear, or momentary overload. While existing wire-laying pulleys provide basic support and guidance, and some even offer some safety protection against abnormal fluctuations in traction force through locking mechanisms or anti-slip designs, the traction force of the conductor can suddenly decrease or even disappear completely when the connection point detaches. Existing wire-laying pulleys lack real-time detection capabilities for this detachment state, failing to promptly identify the conductor's loss of traction constraint. Furthermore, after the connection point detaches and the conductor loses its traction constraint, existing wire-laying pulleys cannot effectively apply emergency braking and limiting to the detached conductor. Summary of the Invention

[0005] To address the aforementioned issues of existing wire-laying pulleys lacking real-time detection capabilities for detachment states, failing to promptly identify the state of the conductor wire detaching from traction constraints, and being unable to effectively brake and limit the detached conductor wire after the connection node detaches and the conductor wire loses traction constraints, the present invention provides the following technical solution.

[0006] A conductor and ground wire laying device for overhead transmission line construction without crossing towers includes a laying pulley and two suspension frames for suspending the pulley, and further includes:

[0007] The detection roller is located below the ground wire on one side of the wire feeding pulley and is used to detect changes in the tension of the ground wire. When the tension of the ground wire decreases, the detection roller is displaced downward by the gravity of the drooping ground wire.

[0008] A clamping seat is installed between two suspension brackets and above the wire feeding pulley; the clamping seat can move vertically along the suspension brackets.

[0009] The linkage mechanism connects the detection roller and the clamping seat;

[0010] When the detection roller moves downward, the clamping seat is driven to move downward through the linkage mechanism and lock the ground wire on the wire feeding pulley.

[0011] Preferred options also include:

[0012] The adjusting roller is positioned above the ground wire on one side of the wire feeding pulley and is in contact with the surface of the ground wire;

[0013] The linkage mechanism synchronously connects the adjusting roller and the detection roller;

[0014] When the detection roller moves downward, the driving adjustment roller moves away from the ground wire to reduce friction; when the detection roller moves upward, the driving adjustment roller moves closer to the ground wire to increase friction.

[0015] Preferably, the linkage mechanism includes:

[0016] Two first swing arms are respectively installed at both ends of the detection roller, with the end of the first swing arm away from the detection roller located on one side of the suspension frame;

[0017] The first rotating shaft is mounted on the suspension frame at one end and connected to the first swing arm at the other end;

[0018] Two second swing arms are respectively installed at both ends of the adjusting roller, with the end of the second swing arm away from the adjusting roller located on one side of the suspension frame;

[0019] The second rotating shaft is mounted on the suspension frame at one end and connected to the second swing arm at the other end. The second rotating shaft is coaxial with the line-laying pulley, and the axis of the second rotating shaft and the axis of the first rotating shaft are on the same vertical line.

[0020] Preferably, the linkage mechanism further includes:

[0021] The first bevel gear is mounted on the first rotating shaft;

[0022] A rotating rod is mounted on a suspension frame, with a second bevel gear and a first gear mounted at each end of the rotating rod;

[0023] A drive plate is mounted on the suspension frame, and a first rack is mounted on one side of the drive plate, which meshes with a first gear.

[0024] The second gear is mounted on the second rotating shaft, and the second rack is mounted on the side of the drive plate near the second rotating shaft. The second rack meshes with the second gear.

[0025] The third bevel gear is mounted on the second shaft;

[0026] The lead screw is mounted on the suspension frame. One end is equipped with a fourth bevel gear, which meshes with the third bevel gear. The other end is connected to the clamping seat.

[0027] Preferably, a control seat is installed between the two suspension brackets, and a mounting groove is provided at the bottom of the control seat. A clamping seat is installed in the mounting groove, and a second elastic element is installed between the inner wall of the mounting groove and the clamping seat.

[0028] Preferably, the control base includes:

[0029] Two adjustment seats are provided, each mounted on one of the two suspension brackets, and the adjustment seats are connected to the control seat.

[0030] The adjusting seat has a threaded hole, and the lead screw is threadedly connected to the threaded hole.

[0031] Preferably, the suspension bracket includes:

[0032] The base plate is installed on the suspension bracket;

[0033] A movable plate is installed at the bottom of the movable plate, which is mounted on the hanging frame;

[0034] The first elastic element is installed between the base plate and the movable plate.

[0035] Preferably, the suspension bracket further includes:

[0036] The crossbeam mounting plate is connected between the two suspension brackets by a pin.

[0037] Preferably, the detection roller comprises:

[0038] The first connecting rod is installed between the two first swing arms and passes through the detection roller.

[0039] Preferably, the adjusting roller includes:

[0040] The second connecting rod is installed between the two second swing arms and passes through the adjusting roller.

[0041] This invention provides a conductor and ground wire deployment device for overhead transmission lines constructed without crossing towers. Compared with existing technologies, it has the following advantages: By setting a detection roller below the conductor and ground wire, the device utilizes the downward or upward movement caused by changes in conductor and ground wire tension to drive the detection roller to move, thus capturing the state of the conductor and ground wire losing its traction constraint in real time. The displacement of the detection roller is rapidly transmitted through a linkage mechanism, enabling immediate perception of abnormal conductor and ground wire tension and timely and accurate identification of the risk of conductor and ground wire detachment. When the detection roller detects a sudden drop in conductor and ground wire tension and moves downward, the linkage mechanism drives the clamping seat to move downward along the suspension frame, achieving precise locking through the transmission of a lead screw and bevel gear, using clamping force to counteract the downward trend of the conductor and ground wire. This mechanical linkage braking method has a rapid response and can quickly prevent the conductor and ground wire from freely slipping after losing its traction constraint, avoiding safety accidents and equipment damage caused by the conductor and ground wire falling onto crossing objects or rubbing against the tower structure. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the three-dimensional structure proposed in this invention.

[0043] Figure 2 This is a schematic diagram of the three-dimensional structure proposed in this invention from another perspective.

[0044] Figure 3 This is a partially enlarged view of the first swing arm, the first rotating shaft, the second swing arm, and the second rotating shaft proposed in this invention.

[0045] Figure 4 This is a schematic diagram of the wire feeding pulley, detection roller, first swing arm, adjusting roller, and second swing arm proposed in this invention.

[0046] Figure 5 This is a partially enlarged view of the suspension frame, first swing arm, second swing arm, first rotating shaft, second rotating shaft, and drive plate proposed in this invention.

[0047] Figure 6 This is a cross-sectional schematic diagram of the wire feeding pulley, control seat, and clamping seat proposed in this invention.

[0048] The attached figures are labeled as follows:

[0049] 100. Line-laying pulley; 101. Suspension frame; 102. Crossbeam hanging plate; 103. Base plate; 104. First elastic element; 105. Moving plate;

[0050] 200. Detection roller; 201. First swing arm; 202. First connecting rod; 203. First rotating shaft; 204. First bevel gear; 205. Second bevel gear; 206. First gear;

[0051] 300. Adjusting roller; 301. Second swing arm; 302. Second connecting rod; 303. Second rotating shaft; 304. Second gear; 305. Third bevel gear; 306. Fourth bevel gear; 307. Lead screw;

[0052] 400. Control seat; 401. Clamping seat; 402. Second elastic element; 403. Adjusting seat;

[0053] 500, drive board; 501, first rack; 502, second rack. Detailed Implementation

[0054] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0055] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0056] Reference Figures 1-6 A conductor and ground wire laying device for overhead transmission line construction without crossing towers includes a laying pulley 100 and two suspension frames 101 for suspending the pulley. It also includes: a detection roller 200, located below the conductor and ground wire on one side of the laying pulley 100, used to detect changes in conductor and ground wire tension; when the conductor and ground wire tension decreases, the detection roller 200 is displaced downwards by the gravity of the drooping conductor and ground wire; a clamping seat 401, installed between the two suspension frames 101 and located above the laying pulley 101, the clamping seat 401 being vertically movable along the suspension frames 101; and a linkage mechanism connecting the detection roller 200 and the clamping seat 401; wherein, when the detection roller 200 displaces downwards, the linkage mechanism drives the clamping seat 401 to move downwards and lock the conductor and ground wire on the laying pulley 100.

[0057] By setting a detection roller 200 below the ground wire on one side of the wire-laying pulley 100, the downward or upward movement caused by the tension change of the ground wire drives the detection roller 200 to move. Then, the displacement of the detection roller 200 is transmitted to the clamping seat 401 located above the wire-laying pulley 100 through the linkage mechanism, so that the clamping seat 401 moves vertically along the suspension frame 101 and locks the ground wire, forming an integrated structure from detection to transmission to braking. The detection roller 200 is the sensing component for tension change, the linkage mechanism is the power transmission medium, and the clamping seat 401 is the core component for braking. All components work together to deal with the scenario where the traction force of the ground wire disappears.

[0058] Its principle is based on the correlation between the tension and shape change of the conductor wire: when the connection node between the conductor wire and the traction wire falls off or the traction force disappears, the tension of the conductor wire drops sharply and sags under its own weight. The sag of the conductor wire will exert downward pressure on the detection roller 200 below, causing the detection roller 200 to move downward. The displacement of the detection roller 200 is converted into mechanical power through the linkage mechanism, which drives the clamping seat 401, which was originally above the wire feeding pulley 100, to move downward along the suspension frame 101 until it is in close contact with the conductor wire on the wire feeding pulley 100 and locked. The clamping force is used to counteract the downward trend of the conductor wire, thereby completing emergency braking at the same time as detecting the tension abnormality, forming a closed-loop response from tension change perception to braking execution.

[0059] By detecting the instantaneous response of the ground wire tension drop by the detection roller 200, the real-time detection of the ground wire detachment state is realized, which solves the problem that the existing device cannot identify the ground wire detachment from the traction constraint in time. With the help of the linkage mechanism, the clamping seat 401 is driven to lock the ground wire, realizing emergency braking and limiting after detachment, preventing the ground wire from slipping freely due to loss of traction, reducing the safety accidents and equipment damage caused by the ground wire falling to the crossing object or rubbing against the tower structure, and making up for the lack of effective braking measures in the existing device.

[0060] It also includes: an adjusting roller 300, which is disposed above the ground wire on one side of the wire feeding pulley 100 and is in contact with the surface of the ground wire; the linkage mechanism synchronously connects the adjusting roller 300 and the detection roller 200; when the detection roller 200 moves downward, it drives the adjusting roller 300 away from the ground wire to reduce friction; when the detection roller 200 moves upward, it drives the adjusting roller 300 closer to the ground wire to increase friction.

[0061] The adjusting roller 300 is positioned above the ground wire on one side of the wire feeding pulley 100 and is in contact with the surface of the ground wire. It is synchronously connected to the detection roller 200 through a linkage mechanism. When the detection roller 200 moves up or down due to changes in the tension of the ground wire, the linkage mechanism synchronously drives the adjusting roller 300 to move closer to or away from the ground wire, thereby achieving dynamic adjustment of the friction force of the ground wire. Together with the detection roller 200, the clamping seat 401, and the linkage mechanism, it forms a comprehensive response system to cope with tension fluctuations.

[0062] Specifically, the friction between the adjusting roller 300 and the conductor is used as the medium for tension adjustment: when the tension of the conductor increases (such as when the traction speed fluctuates and causes instantaneous tightness), the detection roller 200 moves upward, and the linkage mechanism drives the adjusting roller 300 to move closer to the conductor, increasing the normal pressure on the contact surface and thus increasing the friction. The frictional resistance offsets part of the traction force, preventing the conductor from bearing excessive stress due to excessive tension. When the tension of the conductor decreases (such as in the early stage of loosening of the connection node), the detection roller 200 moves downward, and the linkage mechanism drives the adjusting roller 300 away from the conductor, reducing the friction to avoid additional resistance exacerbating the sag of the conductor, while reserving buffer space for the braking action of the clamping seat 401. The action of the adjusting roller 300 and the detection and braking system are synchronously responded to through the same linkage mechanism, forming a progressive control logic from tension sensing to friction adjustment to emergency braking, so that the conductor can maintain a relatively stable deployment state under different tension conditions.

[0063] When the tension is too high (detection roller 200 moves upward), the adjusting roller 300 moves closer to the conductor to increase friction, suppressing the bouncing or wear of the conductor caused by excessive tension, and achieving dynamic balance of conductor tension. When the tension drops suddenly (detection roller 200 moves downward), the adjusting roller 300 moves away to reduce friction, avoiding additional resistance that exacerbates conductor sag, thus compensating for the inadequacy of the simple braking function in protecting the conductor during tension fluctuations. Through real-time adjustment of friction, the conductor is helped to maintain a stable posture on the laying pulley 100, improving the stability of the laying process and reducing the risk of conductor jumping or twisting caused by sudden tension changes. This complements the braking function of the clamping seat 401, further reducing the probability of construction accidents.

[0064] The linkage mechanism includes: two first swing arms 201, respectively installed at both ends of the detection roller 200, with the end of the first swing arm 201 away from the detection roller 200 located on one side of the suspension frame 101; a first rotating shaft 203, one end of which is installed on the suspension frame 101 and the other end of which is connected to the first swing arm 201; two second swing arms 301, respectively installed at both ends of the adjusting roller 300, with the end of the second swing arm 301 away from the adjusting roller 300 located on one side of the suspension frame 101; a second rotating shaft 303, one end of which is installed on the suspension frame 101 and the other end of which is connected to the second swing arm 301, the second rotating shaft 303 being coaxially arranged with the wire feeding pulley 100, and the axis of the second rotating shaft 303 and the first rotating shaft 203 being on the same vertical line.

[0065] The linkage mechanism further includes: a first bevel gear 204 mounted on a first rotating shaft 203; a rotating rod mounted on a suspension frame 101, with a second bevel gear 205 and a first gear 206 mounted at both ends of the rotating rod; a drive plate 500 mounted on the suspension frame 101, with a first rack 501 mounted on one side of the drive plate 500, the first rack 501 meshing with the first gear 206; a second gear 304 mounted on a second rotating shaft 303, with a second rack 502 mounted on the side of the drive plate 500 near the second rotating shaft 303, the second rack 502 meshing with the second gear 304; a third bevel gear 305 mounted on the second rotating shaft 303; and a lead screw 307 mounted on the suspension frame 101, with a fourth bevel gear 306 mounted at one end, the third bevel gear 305 meshing with the fourth bevel gear 306, and the other end connected to a clamping seat 401.

[0066] The first swing arms 201 at both ends of the detection roller 200 are connected to the first rotating shaft 203 on the suspension frame 101. The second swing arms 301 at both ends of the adjusting roller 300 are connected to the second rotating shaft 303 coaxial with the wire feeding pulley 100, and the two rotating shafts are collinear. The first bevel gear 204 of the first rotating shaft 203 meshes with the second bevel gear 205 of the rotating rod. The first gear 206 at the other end of the rotating rod engages with the first rack 501 of the drive plate 500. The second rack 502 on the other side of the drive plate 500 meshes with the second gear 304 of the second rotating shaft 303. At the same time, the third bevel gear 305 of the second rotating shaft 303 meshes with the fourth bevel gear 306 of the lead screw 307. The end of the lead screw 307 is connected to the clamping seat 401. Through the multi-stage transmission of swing arm-rotating shaft-bevel gear-gear rack-lead screw 307, the displacement of the detection roller 200 is synchronously transmitted to the adjusting roller 300 and the clamping seat 401.

[0067] Specifically, based on the motion conversion and force transmission of mechanical transmission: when the detection roller 200 moves up and down due to the change in conductor tension, the first swing arm 201 rotates around the first rotating shaft 203, driving the first bevel gear 204 to rotate. Through meshing with the second bevel gear 205, the motion is transmitted to the rotating rod, causing the first gear 206 to drive the drive plate 500 to move along the suspension frame 101. The first rack 501 of the drive plate 500 synchronously drives the second gear 304 and the second rotating shaft 303 to rotate, causing the second swing arm 301 to drive the adjusting roller 300 closer to or... The second rotating shaft 303 is far from the ground wire; at the same time, the third bevel gear 305 and the fourth bevel gear 306 of the second rotating shaft 303 mesh, driving the lead screw 307 to rotate, converting the rotational motion into the vertical linear motion of the clamping seat 401, realizing the real-time linkage between the friction adjustment of the adjusting roller 300 and the braking action of the clamping seat 401; the design of the two rotating shafts being collinear and the second rotating shaft 303 being coaxial with the wire feeding pulley 100 ensures that the line of action of the force during the transmission process is consistent with the trajectory of the ground wire, reducing additional torque, and enabling the entire system to maintain motion coordination and timely response when tension changes.

[0068] The bevel gear meshing and rack and pinion engagement reduce power loss and ensure high transmission accuracy, guaranteeing that the minute displacement of the detection roller 200 can be accurately converted into the movement of the adjusting roller 300 and the clamping seat 401, thus improving the sensitivity of tension detection and braking. The coaxial design of the second rotating shaft 303 and the wire-laying pulley 100, as well as the collinear design of the two rotating shafts, ensures strong motion synchronization, guaranteeing that the movement trajectory of the adjusting roller 300 is consistent with the laying path of the ground wire. The drive plate 500 simultaneously drives the adjusting roller 300 and the clamping seat 401, avoiding response delay between the two. The multi-stage transmission disperses the force, resulting in good structural stability. The rigid connection between the swing arm and the rotating shaft enhances the impact resistance, adapts to the vibration environment of field construction, and reduces the probability of mechanical failure.

[0069] A control seat 400 is installed between the two suspension brackets 101. The bottom of the control seat 400 has an installation groove. The clamping seat 401 is installed in the installation groove. A second elastic element 402 is installed between the inner wall of the installation groove and the clamping seat 401.

[0070] The second elastic element 402 can be a spring or a spring block. When the linkage mechanism drives the clamping seat 401 to move down along the mounting groove via the lead screw 307, the clamping seat 401 first compresses the second elastic element 402. The deformation of the elastic element generates a gradually increasing reverse force, which slowly increases the pressure of the clamping seat 401 on the ground wire, thus achieving reliable locking while avoiding excessive compression and damage to the ground wire. The inner wall of the mounting groove restricts the lateral displacement of the clamping seat 401, ensuring that it always moves in the vertical direction, complementing the longitudinal buffer of the elastic element and ensuring the stability of the clamping action. At the same time, the elastic force of the second elastic element 402 can provide adaptive adjustment when the ground wire wobbles slightly, maintaining the consistency of the clamping state and avoiding slippage of the ground wire due to momentary loosening, further enhancing the reliability of emergency braking.

[0071] The second elastic element 402 can absorb the impact force when the clamping seat 401 moves downward, realizing flexible buffering of the clamping action, avoiding damage to the surface of the ground wire caused by rigid locking, and reducing hard collision wear between the clamping seat 401 and the mounting groove. The guiding function of the mounting groove, together with the adaptive adjustment of the elastic element, improves the clamping accuracy, can compensate for processing or installation errors, and ensures that the clamping seat 401 and the ground wire on the wire feeding pulley 100 are accurately aligned, avoiding locking failure due to misalignment. The elastic element reduces the load on components such as the lead screw 307 and the clamping seat 401 by buffering the impact force, reducing mechanical fatigue during long-term use, enhancing the durability of the mechanism, and extending the service life of the device.

[0072] The control seat 400 includes: two adjustment seats 403, which are respectively installed on two suspension brackets 101. The adjustment seats 403 are connected to the control seat 400. The adjustment seats 403 are provided with threaded holes, and the lead screw 307 is threadedly connected to the threaded holes.

[0073] The control seat 400 is connected to the suspension frame 101 through two adjusting seats 403. The threaded holes on the adjusting seats 403 form a threaded engagement with the lead screw 307, constituting the precision drive structure of the clamping seat 401. The adjusting seats 403 are fixed to the two sides of the suspension frame 101 respectively, serving as the support carrier for the lead screw 307. One end of the lead screw 307 passes through the adjusting seat 403 through the threaded hole, and the other end is connected to the clamping seat 401. When the lead screw 307 rotates under the drive of the linkage mechanism, the threaded engagement converts the rotational motion into the axial linear motion of the lead screw 307, driving the clamping seat 401 to move vertically along the suspension frame 101, thereby clamping or releasing the ground wire.

[0074] Specifically, when the third bevel gear 305 and the fourth bevel gear 306 mesh to transmit rotational motion to the lead screw 307, the lead screw 307 and the threaded hole of the adjusting seat 403 form a helical pair. The interaction force between the thread teeth converts the rotational motion of the lead screw 307 into linear motion along the axial direction. Since the adjusting seat 403 is fixed to the suspension frame 101, the lead screw 307 cannot rotate with the threaded hole and can only move axially, thereby driving the clamping seat 401 at the connecting end to move synchronously. At the same time, the self-locking function of the thread can keep the position unchanged after clamping, preventing the clamping seat 401 from rebounding due to the reaction force of the ground wire, and ensuring the continuity of the locked state.

[0075] The screw drive between the threaded hole and the lead screw 307 has self-locking and micro-adjustment capabilities, improving the displacement accuracy of the clamping seat 401. The downward movement distance of the clamping seat 401 can be precisely controlled by controlling the rotation angle of the lead screw 307, avoiding damage to the conductor wire due to excessive braking or locking failure caused by insufficient braking. The two adjusting seats 403 are symmetrically distributed on both sides of the suspension frame 101 to ensure balanced force on the lead screw 307, enhance structural stability, prevent the clamping seat 401 from tilting during movement, ensure the alignment accuracy with the wire feeding pulley 100, and improve braking reliability. The threaded engagement can stably convert the rotational power of the linkage mechanism into the linear driving force of the clamping seat 401, reduce power loss, achieve high efficiency in power transmission, and ensure rapid braking response after the detection roller 200 is triggered.

[0076] The suspension frame 101 includes: a base plate 103, mounted on the suspension frame 101; a movable plate 105, mounted on the bottom end of the movable plate 105, the movable plate 105 being disposed on the suspension frame 101; a first elastic member 104, installed between the base plate 103 and the movable plate 105; and a crossbeam hanging plate 102, connected between the two suspension frames 101 by a pin.

[0077] The combination of the base plate 103, the movable plate 105, the first elastic element 104, and the crossbeam hanging plate 102 forms a composite structure that combines support, buffering, and connection functions: the base plate 103 is fixed to the body of the suspension frame 101, providing an installation base for the movable plate 105; the movable plate 105 is set at the bottom of the base plate 103 and can slide along the suspension frame 101, and the first elastic element 104 between it and the base plate 103 forms elastic support; the crossbeam hanging plate 102 connects the two suspension frames 101 through pins, realizing the lateral fixation of the overall structure. At the same time, each component cooperates with the linkage mechanism to form a complete force transmission and support, and also facilitates the removal of the line-laying pulley 100 from the grounding wire.

[0078] The first elastic element 104 can be a spring or a spring block. It can absorb the instantaneous impact force during the deployment of the ground wire through deformation, improve the buffering and shock absorption capacity of the device, and reduce the wear of vibration on the linkage mechanism. The first elastic element 104 can also drive the moving plate 105 and the driving plate 500 to reset and move. The sliding characteristics of the moving plate 105 allow the suspension frame 101 to be finely adjusted in position within a certain range according to the change of ground wire tension, which enhances the structural adaptability and avoids component jamming caused by rigid connection. At the same time, the pin connection method of the crossarm hanging plate 102 is convenient for installation and disassembly and can be adapted to the crossarm spacing of different specifications of iron towers. The crossarm hanging plate 102 rigidly connects the two suspension frames 101 through pins to ensure overall stability, prevent the suspension frame 101 from tilting laterally when subjected to force on one side, and ensure the transmission accuracy of the linkage mechanism.

[0079] The detection roller 200 includes a first connecting rod 202, which is installed between two first swing arms 201 and passes through the detection roller 200.

[0080] The adjusting roller 300 includes a second connecting rod 302, which is installed between two second swing arms 301 and passes through the adjusting roller 300.

[0081] The first connecting rod 202 passes through the detection roller 200 and connects to the two first swing arms 201. The second connecting rod 302 passes through the adjusting roller 300 and connects to the two second swing arms 301. By using the connecting rod as an intermediate connecting part between the detection roller 200, the adjusting roller 300 and the swing arms, a detachable assembly structure is formed: when it is necessary to remove the detection roller 200 or the adjusting roller 300, it is only necessary to disconnect the connection between the connecting rod and the swing arm, such as by separating the bushing or removing the fixing pin, so that the roller body can be separated from the swing arm, and then the detection roller 200 or the adjusting roller 300 can be removed from the grounding wire without any additional operation on the grounding wire itself.

[0082] Specifically, after construction is completed or when the roller body needs to be inspected or replaced, the detection roller 200 and the adjusting roller 300 can be quickly separated by disassembling the connecting rod, avoiding wear or positional displacement caused by excessive contact with the ground wire due to component removal; on the other hand, the design of the connecting rod penetrating the roller body ensures the stability of the connection between the detection roller 200, the adjusting roller 300 and the swing arm, while simplifying the disassembly steps and reducing interference with the construction progress, which is especially suitable for scenarios where equipment is frequently moved in multi-spacing line deployment.

[0083] During use, when the ground wire is normally laid out, it maintains a certain tension on the laying pulley 100. The detection roller 200 is located below the ground wire and is not under significant pressure. The adjusting roller 300 is moderately attached above the ground wire. At this time, the first swing arm 201 and the second swing arm 301 are in their initial positions, and the linkage mechanism is not triggered. When the tension of the ground wire increases, the ground wire drives the detection roller 200 to move upward, causing the first swing arm 201 to rotate around the first rotating shaft 203. The first bevel gear 204 on the first rotating shaft 203 rotates accordingly, driving the rotation through meshing with the second bevel gear 205 at the end of the rotating rod. When the rotating rod rotates, the first gear 206 at the other end of the rotating rod drives the first rack 501 on the drive plate 500 to move. Simultaneously, the drive plate 500 meshes with the second gear 304 on the second rotating shaft 303 through the second rack 502, causing the second rotating shaft 303 to rotate. This causes the second swing arm 301 to drive the adjusting roller 300 closer to the ground wire to increase friction. At the same time, the third bevel gear 305 on the second rotating shaft 303 meshes with the fourth bevel gear 306 on the lead screw 307, driving the lead screw 307 to rotate but not triggering the clamping seat 401 to move down. The friction of the adjusting roller 300 balances part of the tension.

[0084] When the tension of the ground wire decreases, the ground wire sags due to its own weight and presses the detection roller 200 downward. The first swing arm 201 rotates in the opposite direction, driving the first rotating shaft 203 and the first bevel gear 204 to rotate. Through the rotating rod, the first gear 206, and the first rack 501, the drive plate 500 moves in the opposite direction. The drive plate 500 drives the second gear 304 and the second rotating shaft 303 to rotate through the second rack 502, so that the second swing arm 301 drives the adjusting roller 300 away from the ground wire to reduce friction. At the same time, the third bevel gear 305 of the second rotating shaft 303 drives the lead screw 307 to rotate through the fourth bevel gear 306. The lead screw 307 moves down along the threaded hole of the adjusting seat 403, pushing the clamping seat 401 down along the mounting groove of the control seat 400. After compressing the second elastic element 402, it contacts and locks the ground wire on the wire feeding pulley 100, realizing emergency braking.

[0085] When construction is completed or maintenance is required, remove the crossarm hanging plate 102 by using the pin, disconnect the connection between the two suspension frames 101, then separate the first connecting rod 202 from the first swing arm 201, the second connecting rod 302 from the second swing arm 301, and remove the detection roller 200 and the adjusting roller 300 from the ground wire to complete the disassembly and resetting of the device.

[0086] In summary, compared with existing technologies, it has the following beneficial effects:

[0087] By installing a detection roller 200 below the ground wire, the sag or rise caused by changes in the ground wire tension drives the detection roller 200 to move, capturing in real time the state of the ground wire detaching from the traction constraint. The displacement of the detection roller 200 is rapidly transmitted through a linkage mechanism, enabling immediate detection of abnormal ground wire tension and timely and accurate identification of the risk of ground wire detachment.

[0088] When the detection roller 200 detects a sudden drop in the tension of the ground wire and its downward displacement, the linkage mechanism drives the clamping seat 401 to move downward along the suspension frame 101. Precise locking is achieved through the transmission of the lead screw 307 and the bevel gear, using clamping force to counteract the downward trend of the ground wire. This mechanically linked braking method responds quickly and can rapidly prevent the ground wire from slipping freely after it loses its traction constraint, avoiding safety accidents and equipment damage caused by the ground wire falling onto obstacles or rubbing against the tower structure.

[0089] By coordinating the adjusting roller 300 with the linkage mechanism, the stability and safety of the conductor deployment process are improved. When the conductor tension fluctuates, the adjusting roller 300 moves closer to or further away from the conductor under the drive of the linkage mechanism, dynamically adjusting the friction to balance the tension and suppressing the conductor from bouncing or wearing due to excessive tension, or sagging due to a sudden drop in tension.

[0090] Through a multi-stage transmission structure consisting of a swing arm, a rotating shaft, a bevel gear, a gear rack, and a lead screw 307, the displacement of the detection roller 200 is efficiently converted into the friction adjustment of the adjusting roller 300 and the braking action of the clamping seat 401. The force transmission is stable and the response delay is small during the transmission process.

[0091] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A conductor and ground wire laying device for overhead transmission lines in construction without crossing towers, comprising a laying pulley (100) and two suspension frames (101) for suspending the pulley, characterized in that, Also includes: The detection roller (200) is located below the ground wire on one side of the wire feeding pulley (100) and is used to detect changes in the tension of the ground wire. When the tension of the ground wire decreases, the detection roller (200) is displaced downward by the gravity of the drooping ground wire. A clamping seat (401) is installed between two suspension brackets (101) and above the wire feeding pulley (100). The clamping seat (401) can move vertically along the suspension brackets (101). The linkage mechanism connects the detection roller (200) and the clamping seat (401); When the detection roller (200) moves downward, the clamping seat (401) is driven to move downward through the linkage mechanism and lock the ground wire on the wire feeding pulley (100).

2. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 1, characterized in that, Also includes: The adjusting roller (300) is located above the ground wire on one side of the wire feeding pulley (100) and is in contact with the surface of the ground wire; The linkage mechanism synchronously connects the adjusting roller (300) and the detection roller (200); When the detection roller (200) moves downward, the driving adjustment roller (300) moves away from the ground wire to reduce friction; when the detection roller (200) moves upward, the driving adjustment roller (300) moves closer to the ground wire to increase friction.

3. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 2, characterized in that, The linkage mechanism includes: Two first swing arms (201) are respectively installed at both ends of the detection roller (200), and the end of the first swing arm (201) away from the detection roller (200) is set on one side of the suspension frame (101); The first rotating shaft (203) is mounted on the suspension frame (101) at one end and connected to the first swing arm (201) at the other end; Two second swing arms (301) are respectively installed at both ends of the adjusting roller (300), and the end of the second swing arm (301) away from the adjusting roller (300) is set on one side of the suspension frame (101); The second rotating shaft (303) is mounted on the suspension frame (101) at one end and connected to the second swing arm (301) at the other end. The second rotating shaft (303) is coaxial with the line-laying pulley (100), and the axis of the second rotating shaft (303) and the first rotating shaft (203) are on the same vertical line.

4. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 3, characterized in that, The linkage mechanism also includes: The first bevel gear (204) is mounted on the first rotating shaft (203); A rotating rod is mounted on a suspension bracket (101), and a second bevel gear (205) and a first gear (206) are respectively mounted on both ends of the rotating rod; A drive plate (500) is mounted on a suspension bracket (101). A first rack (501) is mounted on one side of the drive plate (500), and the first rack (501) meshes with a first gear (206). The second gear (304) is mounted on the second rotating shaft (303). The second rack (502) is mounted on the side of the drive plate (500) near the second rotating shaft (303). The second rack (502) meshes with the second gear (304). The third bevel gear (305) is mounted on the second rotating shaft (303); The lead screw (307) is mounted on the suspension bracket (101), with a fourth bevel gear (306) mounted on one end, the third bevel gear (305) meshing with the fourth bevel gear (306), and the other end connected to the clamping seat (401).

5. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 4, characterized in that, A control seat (400) is installed between the two suspension brackets (101). The bottom of the control seat (400) has an installation groove. The clamping seat (401) is installed in the installation groove. A second elastic element (402) is installed between the inner wall of the installation groove and the clamping seat (401).

6. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 5, characterized in that, The control unit (400) includes: There are two adjustment seats (403), which are installed on two suspension brackets (101) respectively. The adjustment seats (403) are connected to the control seat (400). The adjusting seat (403) has a threaded hole, and the lead screw (307) is threadedly connected to the threaded hole.

7. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 1, characterized in that, The suspension bracket (101) includes: The base plate (103) is mounted on the suspension bracket (101); A movable plate (105) is installed at the bottom end of the movable plate (105), and the movable plate (105) is set on the suspension frame (101); The first elastic element (104) is installed between the base plate (103) and the movable plate (105).

8. The overhead transmission line conductor and ground wire laying device for construction without crossing towers as described in claim 1 or 7, characterized in that, The suspension bracket (101) also includes: The crossbeam mounting plate (102) is connected between the two suspension brackets (101) by a pin.

9. The overhead transmission line conductor and ground wire laying device for construction without crossing towers according to claim 1, characterized in that, The detection roller (200) includes: The first connecting rod (202) is installed between the two first swing arms (201) and passes through the detection roller (200).

10. The overhead transmission line conductor and ground wire laying device for construction without crossing towers according to claim 2, characterized in that, The adjusting roller (300) includes: The second connecting rod (302) is installed between the two second swing arms (301) and passes through the adjusting roller (300).

Images