An automatic power line tightening device for live-line work

Abstract

The application discloses a kind of electric power automatic tight line device of hot-line work, it is related to tight line device technical field, however in the process of hot-line work, need to use two insulating tight line device, when two groups of people are tight line respectively, the length of each time take-up wire is not same, leading to the stress of cross arm two sides is not consistent, occurs different degree of side deviation, operation is extremely inconvenient, greatly increases operation time and safety risk, the present application is connected with the convenient adsorption of cross arm angle iron by magnet, the coordinated operation of each component in telescopic device can accurately control the action of push rod, cooperate with link rope, double-end rope, anti-unhooking, wire clamp and other components can effectively and stably tight line operation to electric wire. Realize automatic tight line function, reduce tool use and shielding measure, to improve operation safety and efficiency, reduce physical exertion to operating personnel, greatly improve the safety, reliability and operation convenience of electric power automatic tight line in hot-line work.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire tightener, in particular to an electric power automatic tight line device for live working. BACKGROUND

[0002] With the development of society, people's demand for power supply reliability is getting higher and higher. In order to deeply implement the concept of "can work with power on, and one stop for multiple use", strict power control and strengthening live maintenance are taken as the starting point, the role of live working center is played, and the non-stop power operation of distribution network is promoted. The straight pole is changed into the strain pole by the insulating glove operation method, which is a common project in non-stop power operation and can solve many practical problems in distribution network operation and construction. There are many operation points in the process of live working, and the original branch insulator needs to be replaced with strain insulator. The insulating boom truck needs to be prepared, and many skilled operation personnel need to be grouped to operate on both sides of the cross arm.

[0003] However, in the process of live working, two insulating tight line devices are needed. When two groups of people tighten the line, the length of the line collected each time is different, resulting in inconsistent stress on both sides of the cross arm, different degrees of side deviation, and extremely inconvenient operation, which greatly increases the operation time and safety risk.

[0004] In view of the above problems, an electric power automatic tight line device for live working is provided. SUMMARY

[0005] The purpose of the present application is to provide an electric power automatic tight line device for live working, which solves the problem of complicated tight line operation in the background art.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: an electric power automatic tight line device for live working, comprising a wire and a cross arm angle iron, the wire is provided with a cross arm angle iron, the cross arm angle iron is used for supporting the wire, a tight line assembly is installed on the cross arm angle iron, the tight line assembly comprises a connecting upper cover, a magnet is connected to the connecting upper cover, the connecting upper cover and the cross arm angle iron are adsorbed together, a telescopic device is connected to the both ends of the connecting upper cover through a hexagonal bolt, a motor control line, a power line and a clutch line are led out from the telescopic device, and the telescopic device is connected with a control system;

[0007] The output end of the telescopic device is connected with a connecting rope, the side away from the telescopic device of the connecting rope is connected with a double-end rope, the end of the double-end rope is connected with an anti-unhooking hook, the anti-unhooking hook is connected with a clamping arm, the outer wall of the clamping arm is connected with a wire clamp, the wire clamp is fixedly connected with a wire clamping groove, and the wire clamping groove is used for fixing the wire.

[0008] The control system is composed of a touch screen PLC integrated machine, a servo driver and a lithium battery, the touch screen PLC integrated machine is connected with the lithium battery through a power line, and the PLC integrated machine output port is connected with the servo driver through a communication cable.

[0009] Preferably, the cable clamping device is provided with an emergency assembly, the emergency assembly comprises an engaging arm, the engaging arm is connected to the cable clamping device, a wire pressing strip is connected to the surface of the engaging arm, a balance rod is installed at the top end of the wire pressing strip, and a positioning shell is connected to the top end of the cable clamping device.

[0010] The surface of the balance rod is connected with a limiting assembly, the limiting assembly comprises a positioning plate, the positioning plate is connected to the balance rod, and the positioning plate and the balance rod are fixedly connected, a supporting large arm is connected to the top end of the positioning plate, a supporting small arm is connected to the top end of the supporting large arm, a first spring rod is connected between the positioning plate and the supporting large arm, a second spring rod is connected between the supporting large arm and the supporting small arm, and a limiting head is connected to the top end of the supporting small arm.

[0011] The bottom surface of the limiting head is provided with a limiting assembly, the limiting assembly comprises a clamping block, the bottom surface of the limiting head is connected with the clamping block, the top surface of the limiting head is provided with a first meshing groove, and the clamping block is embedded into the first meshing groove.

[0012] Preferably, the upper surface of the cable clamping groove is connected with a wire clamping strip, the upper surface of the wire clamping strip is arc-shaped, the wire clamping strip and the wire pressing strip correspond to each other, and the wire clamping strip and the wire pressing strip are used for clamping the electric wire.

[0013] Preferably, the top surface of the limiting head is inclined, and the bottom surface of the limiting head is also inclined, and the inclination angle of the top surface of the limiting head is consistent with the inclination angle of the bottom surface of the limiting head.

[0014] Preferably, the limiting head is internally provided with a sound transmission bin, the sound transmission bin is internally embedded with a second striking piece, a third striking piece and a first striking piece, the second striking piece, the third striking piece and the first striking piece are arranged side by side in the sound transmission bin, the lengths of the second striking piece, the third striking piece and the first striking piece are different, the second striking piece penetrates the inside of the sound transmission bin, the length of the third striking piece is only one half of the longitudinal depth of the sound transmission bin, and the length of the first striking piece is only one third of the longitudinal depth of the sound transmission bin.

[0015] Preferably, the top surface of the limiting head is also provided with a second engagement groove and a third engagement groove, the first, second and third engagement grooves are arranged side by side on the top surface of the limiting head, and the top surface of the limiting head is fixedly connected with a limiting strip for separating the first, second and third engagement grooves.

[0016] Preferably, the first engagement groove has the longest length, the third engagement groove has the shortest length, and the lengths of the first, second and third engagement grooves gradually decrease.

[0017] Preferably, the distance between the first engagement grooves is small, the distance between the other side grooves is large, and as the height of the first engagement groove arranged on the limiting head gradually increases, the distance between the grooves arranged on the limiting head also increases.

[0018] Preferably, the clamping blocks correspond to the first, second and third engagement grooves in sequence, and the clamping blocks are embedded in the first, second and third engagement grooves for limiting the relative position of the limiting pressure block and the limiting head.

[0019] Preferably, the bottom end of the first engagement groove is provided with a first hitting piece, the bottom end of the second engagement groove is provided with a third hitting piece, and the bottom end of the third engagement groove is provided with a second hitting piece.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The power automatic tight line device for live working provided by the present application can be conveniently and adsorptively connected with the cross arm angle iron through a magnet, the components in the telescopic device can cooperatively operate to accurately control the action of the push rod, and the components such as the connecting rope, the double-end rope, the anti-unhooking device and the wire clamping device can effectively and stably perform the tight line operation on the electric wire. The automatic tight line function is realized, the use of tools and the shielding measures are reduced, the operation safety and efficiency are improved, the physical consumption of the operator is reduced, and the safety, reliability and operation convenience of the power automatic tight line in live working are greatly improved.

[0022] 2. The power automatic tight line device for live working provided by the present application can, when the wire bundle is stuck during the tight line operation, cleverly unload the influence of the tension on the electric wire through the misalignment design of the limiting head and the limiting pressure block, prevent the electric wire from being excessively pulled, and give the operator sufficient time to troubleshoot problems. During the misalignment process, the jumping of the clamping block in different engagement grooves will hit the corresponding hitting piece to generate a warning sound, and because the structure of the engagement groove and the hitting piece are different, the frequency, volume and timbre of the sound will change, and the operator can accurately master the stage of the stretching and the length of time when the electric wire is stuck. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 Fig. 2 is a schematic diagram of the structure of the wire and cross arm angle iron of the present application;

[0025] Figure 3 Fig. 3 is a schematic diagram of the structure of the tight wire assembly of the present application;

[0026] Figure 4 Fig. 4 is a schematic diagram of the structure of the anti-unhooking and clamping arm of the present application;

[0027] Figure 5 Fig. 5 is a schematic diagram of the structure of the wire clamping strip and the engaging arm of the present application;

[0028] Figure 6 Fig. 6 is a schematic diagram of the structure of the positioning shell and the balance bar of the present application;

[0029] Figure 7 Fig. 7 is a schematic diagram of the structure of the limiting head and the limiting pressure block of the present application;

[0030] Figure 8 Fig. 8 is a schematic diagram of the structure of the clamping block and the sound transmission compartment of the present application;

[0031] Figure 9 Fig. 9 is a schematic diagram of the exploded structure of the limiting head and the limiting pressure block of the present application;

[0032] Figure 10 Fig. 10 is a schematic diagram of the structure of the limiting strip and the first engaging groove of the present application;

[0033] Figure 11 Fig. 11 is a schematic diagram of the cross-sectional structure of the limiting head.

[0034] Fig. 1 is a schematic diagram of the overall structure of the present application; Fig. 2 is a schematic diagram of the structure of the wire and cross arm angle iron of the present application; Fig. 3 is a schematic diagram of the structure of the tight wire assembly of the present application; Fig. 4 is a schematic diagram of the structure of the anti-unhooking and clamping arm of the present application; Fig. 5 is a schematic diagram of the structure of the wire clamping strip and the engaging arm of the present application; Fig. 6 is a schematic diagram of the structure of the positioning shell and the balance bar of the present application; Fig. 7 is a schematic diagram of the structure of the limiting head and the limiting pressure block of the present application; Fig. 8 is a schematic diagram of the structure of the clamping block and the sound transmission compartment of the present application; Fig. 9 is a schematic diagram of the exploded structure of the limiting head and the limiting pressure block of the present application; Fig. 10 is a schematic diagram of the structure of the limiting strip and the first engaging groove of the present application; Fig. 11 is a schematic diagram of the cross-sectional structure of the limiting head. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0036] In order to further understand the present application, the present application will be described in detail with reference to the drawings.

[0037] In combination with Figures 1-11 The power automatic tight line device for live working comprises a wire 12 and a cross arm angle iron 11, the cross arm angle iron 11 is provided with a tight line assembly 2, the tight line assembly 2 comprises a connecting upper cover 21, the connecting upper cover 21 is provided with a magnet, the connecting upper cover 21 and the cross arm angle iron 11 are adsorbed together, the connecting upper cover 21 is provided with an extension device 22 at both ends through a hexagonal bolt, the extension device 22 comprises a motor, a gear, a screw rod, a nut, a push rod and a limit switch, the gear is connected with the motor shaft in meshing connection, for transmitting the rotary motion of the motor, the screw rod is connected in meshing connection on the gear, the nut is connected on the outer surface of the screw rod, the push rod is connected on the nut, the limit switch is connected on both sides of the push rod, for detecting the limit position of the push rod, preventing overstretching or compression, the motor control line, the power line and the brake line are led out on the extension device 22, and are connected with a control system;

[0038] The output end of the extension device 22 is connected with a connecting rope 23, the side, away from the extension device 22, of the connecting rope 23 is connected with a double-end rope 24, the end of the double-end rope 24 is connected with an anti-unhooking hook 26, the anti-unhooking hook 26 is connected with a clamping arm 27, the outer wall of the clamping arm 27 is connected with a wire clamp 25, the anti-unhooking hook 26 and the clamping arm 27 are movably connected, the side, away from the anti-unhooking hook 26, of the clamping arm 27 is movably connected with the wire clamp 25, the end of the wire clamp 25 is further connected with an anti-unhooking hook 26, the wire clamp 25 is fixedly connected with a wire clamping groove 28, the wire clamping groove 28 is used for fixing the wire 12;

[0039] The control system is composed of a touch screen PLC all-in-one machine, a servo driver and a lithium battery, the touch screen PLC all-in-one machine is connected with the lithium battery through a power line, and the output port of the PLC all-in-one machine is connected with the servo driver through a communication cable;

[0040] The touch screen PLC all-in-one machine is a device integrating a programmable logic controller and a touch screen interface. The PLC is responsible for performing logic control tasks, such as starting, stopping, and speed adjustment of the automatic wire tensioning device. The touch screen serves as a human-machine interface, allowing users to intuitively monitor system status, input control parameters, and adjust system settings. The servo driver receives control signals from the PLC and converts current and voltage. The lithium battery pack provides stable DC power for the system and is composed of multiple single batteries, which are monitored and managed by the battery management system to ensure the safety and efficient operation of the batteries.

[0041] The working principle and steps of the control system are as follows:

[0042] S1: Connect the motor control line, power line, and brake line of the motor to the corresponding lines of the driver in sequence. The driver end line has been pre-connected to the touch screen PLC all-in-one machine.

[0043] S2: Connect the total power line to the lithium battery. Before plugging in the total power, check whether each component is installed firmly and whether each connection part is sealed well to ensure that the equipment is in normal condition.

[0044] S3: Turn on the air switch on the control panel to supply power and observe the PLC power-on situation at the same time.

[0045] S4: If the power-on is successful, you will hear a buzzer alarm, which is a safety prompt alarm. After ensuring the safety of the operation, press the reset key to eliminate the alarm sound.

[0046] S5: Click the start button to start the operating system. The green running indicator light is always on, and the system starts running. If you need to stop the system at the end of the operation, you can press the stop key to end the running. If you encounter an emergency situation during the operation process, you can press the emergency stop button to protect it.

[0047] S6: In the system running state, operate the motor rotation switch to move the corresponding motor. Rotate the knob to the target position to keep the position. During the rotation button operation process, the corresponding indicator light will always be on. If the motor indicator light is not on, you need to turn off the system and check it after power-off. If there is no error, restart the button.

[0048] S7: During the operation of the equipment, pay close attention to the running state of the equipment. If there is an abnormal situation, stop the machine immediately for inspection.

[0049] S8: After the equipment is stopped, clean and maintain it according to the operation procedures to prolong the service life of the equipment.

[0050] This control system allows users to easily master the operation of the equipment. The power-off protection setting can protect the motor brake in case of sudden power failure. It is easy to disassemble and maintain, reducing maintenance costs and downtime.

[0051] With the continuous expansion and upgrading of the power network, the requirement for power line construction efficiency is increasing, and the automatic tight line device emerges as the times require and is widely used. The traditional automatic tight line device can effectively apply appropriate tension to the wire bundle during normal operation, and pull the wire bundle to the predetermined tension state, so as to ensure the stable installation of the line. However, in the actual tight line process, various complex working conditions and sudden situations are often encountered;

[0052] When the wire bundle is stuck at the pulley, wire slot or other tight line components, since the automatic tight line device usually works according to the preset tension program, it cannot timely perceive and adapt to the change of the abnormal resistance, which will cause it to still continuously output larger tension. This excessive tension acting on the stuck wire bundle will make the wire bundle bear tensile stress far exceeding its designed bearing capacity. The wire bundle, as the key carrier of power transmission, usually has a certain elastic limit and tensile strength. Under the long-time action of excessive tension, the metal wire or fiber structure inside the wire bundle will gradually undergo irreversible plastic deformation, and the originally closely arranged structure will be stretched and thinned, resulting in the decrease of the diameter and overall strength of the wire bundle.

[0053] In order to overcome the defects of the existing live working power automatic tight line device that is easy to cause the wire bundle to stretch and deform or even break when the wire bundle is stuck, it is urgent to develop a tight line device to improve the safety and reliability of live working, and ensure the stable operation of the power system. The specific operation is as follows:

[0054] The wire clamp 25 is provided with an emergency assembly 3, the emergency assembly 3 comprises a connecting arm 32, the wire clamp 25 is connected with the connecting arm 32, and the wire clamp 25 and the connecting arm 32 are slidably connected, the surface of the connecting arm 32 is connected with a wire pressing strip 33, the top end of the wire pressing strip 33 is installed with a balance rod 35, the top end of the wire clamp 25 is connected with a positioning shell 34, the balance rod 35 penetrates the inside of the positioning shell 34, the upper surface of the wire clamp groove 28 is connected with a wire clamping strip 31, the upper surface of the wire clamping strip 31 is arc-shaped, the wire clamping strip 31 and the wire pressing strip 33 correspond to each other, and the wire clamping strip 31 and the wire pressing strip 33 are used for clamping the electric wire 12;

[0055] In order to improve the clamping of the wire 12, the wire 12 is clamped by the combination of the clamping strip 31 and the connecting arm 32, but in daily use, when the anti-unhooking hook 26 is pulled by the acting force, the clamping arm 27 is driven to be angularly deflected, so that the wire clamping groove 28 arranged on the clamping arm 27 moves upward, and the movement of the wire clamping groove 28 causes the clamping strip 31 and the pressing strip 33 to continuously approach each other, thereby achieving the clamping effect on the wire 12. After clamping the wire 12, the wire 12 is pulled by the wire clamp 25, thereby achieving the function of tightening the wire. In order to avoid abnormal deformation of the wire harness during tightening, the contact area between the wire 12 and the clamping strip 31 and the pressing strip 33 is increased, so that the stress area of the wire 12 is larger during pulling, and the local pressure is reduced, thereby avoiding local damage.

[0056] In addition, when the wire harness is stuck and cannot be normally pulled during tightening, the limiting assembly 4 and the positioning assembly 5 are arranged to play a certain degree of protection function and early warning function, so as to avoid damage to the wire 12 caused by pulling. The specific operation is as follows:

[0057] The limiting assembly 4 is connected to the surface of the balance rod 35. The limiting assembly 4 comprises a positioning plate 41 connected to the balance rod 35. The positioning plate 41 and the balance rod 35 are fixedly connected. The top end of the positioning plate 41 is connected with a supporting large arm 42. The top end of the supporting large arm 42 is connected with a supporting small arm 44. The positioning plate 41 and the supporting large arm 42 are connected with a first spring rod 43. The supporting large arm 42 and the supporting small arm 44 are connected with a second spring rod 45. Therefore, the top end of the supporting small arm 44 is connected with a limiting head 46. The top end of the limiting head 46 is provided with a limiting pressing block 47. The top surface of the limiting head 46 is inclined. The bottom surface of the limiting pressing block 47 is also inclined. The inclination angle of the top surface of the limiting head 46 is consistent with the inclination angle of the bottom surface of the limiting pressing block 47. The limiting pressing block 47 is fixedly connected to the inner wall of the positioning shell 34.

[0058] The bottom surface of the limiting pressing block 47 is connected with the positioning assembly 5. The positioning assembly 5 comprises a clamping block 51. The bottom surface of the limiting pressing block 47 is connected with the clamping block 51. The top surface of the limiting head 46 is provided with a first meshing groove 55. The clamping block 51 is embedded into the inside of the first meshing groove 55.

[0059] The inside of the limiting head 46 is provided with a sound transmission bin 52, the inside of the sound transmission bin 52 is embedded with a second hitting piece 58, a third hitting piece 59 and a first hitting piece 53, the second hitting piece 58, the third hitting piece 59 and the first hitting piece 53 are arranged side by side in the inside of the sound transmission bin 52, the lengths of the second hitting piece 58, the third hitting piece 59 and the first hitting piece 53 are different, the second hitting piece 58 penetrates the inside of the sound transmission bin 52, the length of the third hitting piece 59 is only one half of the longitudinal depth of the sound transmission bin 52, and the length of the first hitting piece 53 is only one third of the longitudinal depth of the sound transmission bin 52.

[0060] The top surface of the limiting head 46 is also provided with a second engaging groove 56 and a third engaging groove 57, the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57 are arranged side by side on the top surface of the limiting head 46, the top surface of the limiting head 46 is fixedly connected with a limiting strip 54, the limiting strip 54 is used for separating the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57, the length of the first engaging groove 55 is the longest, the length of the third engaging groove 57 is the shortest, the lengths of the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57 gradually decrease, the groove spacing between the first engaging groove 55 is small, the groove spacing on the other side is large, and as the height of the first engaging groove 55 provided on the limiting head 46 gradually increases, the groove spacing provided on the limiting head 46 also gradually increases.

[0061] The engaging block 51 corresponds to the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57 in sequence, the engaging block 51 is embedded in the inside of the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57 and is used for limiting the relative position of the limiting pressing block 47 and the limiting head 46, the bottom end of the first engaging groove 55 is correspondingly provided with the first hitting piece 53, the bottom end of the second engaging groove 56 is correspondingly provided with the third hitting piece 59, and the bottom end of the third engaging groove 57 is correspondingly provided with the second hitting piece 58.

[0062] When the wire harness is jammed, because the connecting arm 32 and the wire clamping device 25 are in sliding connection, and the positioning plate 41, the supporting large arm 42, the first spring rod 43, the supporting small arm 44, the second spring rod 45 and the limiting head 46 are only embedded in the inside of the positioning shell 34 and have no connection relationship with the positioning shell 34, when the wire 12 is jammed, the wire pressing strip 33 cannot move by wrapping the wire 12, at this time, the pulling of the wire clamping device 25 only drives the positioning shell 34 and the limiting pressing block 47 inside to move, at this time, the limiting pressing block 47 and the limiting head 46 are dislocated, and at the same time, the wire clamping device 25 and the connecting arm 32 are also in sliding state, and the influence of the pulling force on the wire 12 is relieved through the dislocation between the two.

[0063] In this stage of the limit head 46 and the limit block 47 misalignment, the movement of the limit block 47 cannot drive the limit head 46 to move, so the wire 12 cannot continue to advance, which plays a role in protecting the wire 12, and gives enough time for the staff to troubleshoot the problem;

[0064] In the design of the limit head 46 and the limit block 47, the specific operation is as follows:

[0065] When the wire 12 is not jammed, the positioning shell 34 moves to drive the limit block 47 to move, and when the limit block 47 moves, it drives the limit head 46 to move, because the limit block 47 at the bottom is provided with a clamping block 51 clamped in the first engagement groove 55 opened on the top surface of the limit head 46, through the engagement between the clamping block 51 and the first engagement groove 55, the limit head 46 is driven to move, when the limit head 46 moves, it drives the positioning plate 41 to move, when the positioning plate 41 moves, it drives the balance lever 35, and then the balance lever 35 drives the wire pressing strip 33 to move, when the wire pressing strip 33 moves, it drives the wire clamp 25 and the wire 12 to move, thereby realizing the function of tightening the wire.

[0066] When the wire 12 is jammed and cannot be pulled, the movement of the limit block 47 cannot drive the movement of the limit head 46, and at this time, because the limit block 47 drives the clamping block 51 to move when it moves, due to the jamming of the wire 12, the positions of the wire pressing strip 33, the positioning plate 41 and the limit head 46 cannot be changed, at this time, the limit block 47 will be misaligned with the limit head 46, during the misalignment, the influence of the tension on the wire 12 is removed, and during the misalignment, the clamping block 51 repeatedly jumps in the first engagement groove 55, because the force causes the clamping block 51 to deform, with the continuous movement of the clamping block 51, it will move to contact the second engagement groove 56, and finally contact the third engagement groove 57, when the clamping block 51 repeatedly jumps in the first engagement groove 55, after jumping into the first engagement groove 55, the clamping block 51 will contact the first striking piece 53, when the clamping block 51 hits the first striking piece 53, the impact will produce a sound, and the sound will be transmitted through the sound transmission bin 52, so that the staff can hear the sound produced by the impact, which can play a warning role, in addition, in order to more accurately let the staff master the stretching stage, through the first engagement groove 55, the second engagement groove 56 and the third engagement groove 57 provided on the limit head 46, and the first striking piece 53, the second striking piece 58 and the third striking piece 59 provided in the sound transmission bin 52, the frequency of the striking can be changed, and according to the frequency of the clamping block 51 striking, the length of time of the wire 12 being jammed can be further determined;

[0067] When the engaging block 51 is embedded in the interior of the first engaging groove 55, the engaging block 51 needs to jump in the interior of the first engaging groove 55, the starting point of the jump of the engaging block 51 is defined as the front end, and the end of the jump is defined as the rear end. In the initial stage, the engaging block 51 is engaged at the front end of the first engaging groove 55, and then the engaging block 51 moves towards the rear end of the first engaging groove 55 along with the position of the two. Since the front end of the first engaging groove 55 has low density, that is, the through holes have low density and the distance between the through holes is large, the distance of the jump of the engaging block 51 is far when the engaging block 51 jumps to another through hole. Under the condition that the pulling speed is balanced, the jump frequency of the engaging block 51 is low, and the frequency of the engaging block 51 hitting the first hitting piece 53 is also low, so the frequency of the warning sound is low. As the engaging block 51 continuously moves towards the rear end of the first engaging groove 55, the distance between the through holes becomes smaller, and the jump frequency of the engaging block 51 also becomes higher, so the frequency of hitting the first hitting piece 53 is accelerated, and the worker can preliminarily judge through the frequency of hitting.

[0068] In addition, the sound of hitting is also gradually increasing. As the engaging block 51 moves, it is initially engaged with the first engaging groove 55, then engaged with the second engaging groove 56, and finally engaged with the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57. Since the bottom ends of the second engaging groove 56 and the third engaging groove 57 are provided with the third hitting piece 59 and the second hitting piece 58, the engaging block 51 will hit the first hitting piece 53, the third hitting piece 59 and the second hitting piece 58 at the same time, and the volume of the hitting sound will also be increased. The length of the first hitting piece 53, the third hitting piece 59 and the second hitting piece 58 is different, and the sound produced by the engaging block 51 hitting is also different, which also plays a warning role.

[0069] Finally, in order to make the fitting degree of the limiting head 46 and the limiting pressing block 47 higher, the supporting small arm 44 supports them, and under the action of the first spring rod 43 and the supporting large arm 42, the two always remain in close contact. As the limiting pressing block 47 and the limiting head 46 are continuously out of position, the limiting head 46 and the limiting pressing block 47 are completely separated, and the movement of the limiting pressing block 47 cannot drive the limiting head 46, which also plays a role in protecting the electric wire 12 and avoiding the electric wire 12 from being pulled too much and broken.

[0070] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0071] While the embodiments of the application have been shown and described herein, it is to be understood that the scope of the application, jointly pointed out in the appended claims, is not limited to the details of the embodiments shown, and that various changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined in the following claims and their equivalents.

Claims

1. A live working power automatic wire tensioner comprising a wire (12) and a cross arm angle iron (11), characterized in that: The cross arm angle iron (11) is used for supporting the electric wire (12), the tight wire assembly (2) is installed on the cross arm angle iron (11), the connecting upper cover (21) is connected with the magnet, the connecting upper cover (21) and the cross arm angle iron (11) are adsorbed together, the connecting upper cover (21) is connected with the telescopic device (22) through the hexagon bolt at both ends, the motor control line, the power line and the brake line are led out from the telescopic device (22), and the telescopic device (22) is connected with the control system; The output end of the telescopic device (22) is connected with the connecting rope (23), one side, away from the telescopic device (22), of the connecting rope (23) is connected with the double-head rope (24), the tail end of the double-head rope (24) is connected with the anti-unhooking hook (26), the anti-unhooking hook (26) is connected with the clamping arm (27), the outer wall of the clamping arm (27) is connected with the wire clamp (25), the wire clamp (25) is fixedly connected with the wire clamping groove (28), and the wire clamping groove (28) is used for fixing the electric wire (12); The control system is composed of a touch screen PLC integrated machine, a servo driver and a lithium battery, the touch screen PLC integrated machine is connected with the lithium battery through a power line, and the output port of the PLC integrated machine is connected with the servo driver through a communication cable; The emergency assembly (3) is arranged on the wire clamp (25), the emergency assembly (3) comprises a connecting arm (32), the wire clamp (25) is connected with the connecting arm (32), the surface of the connecting arm (32) is connected with the wire pressing strip (33), the top end of the wire pressing strip (33) is provided with a balance rod (35), the top end of the wire clamp (25) is connected with a positioning shell (34), and the balance rod (35) penetrates the inside of the positioning shell (34); The balance rod (35) is connected with a limiting assembly (4), the limiting assembly (4) comprises a positioning plate (41), the positioning plate (41) is connected on the balance rod (35), the positioning plate (41) and the balance rod (35) are fixedly connected, the top end of the positioning plate (41) is connected with a support large arm (42), the top end of the support large arm (42) is connected with a support small arm (44), the first spring rod (43) is connected between the positioning plate (41) and the support large arm (42), the second spring rod (45) is connected between the support large arm (42) and the support small arm (44), the top end of the support small arm (44) is connected with a limiting head (46), the top end of the limiting head (46) is provided with a limiting pressing block (47), and the limiting pressing block (47) is fixedly connected to the inner wall of the positioning shell (34); The bottom surface of the limiting pressing block (47) is connected with a positioning assembly (5), the positioning assembly (5) comprises a clamping block (51), the bottom surface of the limiting pressing block (47) is connected with the clamping block (51), the top surface of the limiting head (46) is provided with a first meshing groove (55), and the clamping block (51) is embedded into the inside of the first meshing groove (55).

2. The power live-line automatic wire tensioner according to claim 1, characterized in that: The upper surface of the clamping line groove (28) is connected with a wire clamping strip (31), the upper surface of the wire clamping strip (31) is arranged in an arc shape, the wire clamping strip (31) and the wire pressing strip (33) correspond to each other, and the wire clamping strip (31) and the wire pressing strip (33) are used for clamping the electric wire (12).

3. The power live-line automatic wire tensioner of claim 1, wherein: The top surface of the limiting head (46) is arranged in an inclined manner, the bottom surface of the limiting pressing block (47) is also arranged in an inclined manner, and the inclination angle of the top surface of the limiting head (46) is consistent with the inclination angle of the bottom surface of the limiting pressing block (47).

4. The power live-line automatic wire tensioner according to claim 3, wherein: The inside of the limiting head (46) is provided with a sound transmission bin (52), the second hitting piece (58), the third hitting piece (59) and the first hitting piece (53) are embedded in the inside of the sound transmission bin (52), the second hitting piece (58), the third hitting piece (59) and the first hitting piece (53) are arranged side by side in the inside of the sound transmission bin (52), the lengths of the second hitting piece (58), the third hitting piece (59) and the first hitting piece (53) are different, the second hitting piece (58) penetrates the inside of the sound transmission bin (52), the length of the third hitting piece (59) is only one half of the longitudinal depth of the sound transmission bin (52), and the length of the first hitting piece (53) is only one third of the longitudinal depth of the sound transmission bin (52).

5. The power live-line automatic wire tensioner of claim 1, wherein: The top surface of the limiting head (46) is also provided with a second engaging groove (56) and a third engaging groove (57), the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57) are arranged side by side on the top surface of the limiting head (46), the top surface of the limiting head (46) is fixedly connected with a limiting strip (54), and the limiting strip (54) is used for separating the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57).

6. The power live-line automatic wire tensioner of claim 5, wherein: The length of the first engaging groove (55) is the longest, the length of the third engaging groove (57) is the shortest, and the lengths of the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57) gradually decrease.

7. The live-line power automatic wire tensioner of claim 6, wherein: The groove spacing between the first engaging grooves (55) is small, the groove spacing on the other side is large, as the height of the first engaging grooves (55) arranged in the limiting head (46) gradually increases, the groove spacing arranged on the limiting head (46) also gradually increases.

8. The live-line power automatic wire tensioning device of claim 1, wherein: The clamping blocks (51) correspond to the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57) in sequence, and the clamping blocks (51) are embedded in the inside of the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57) and used for limiting the relative position of the limiting pressing block (47) and the limiting head (46).

9. The live-line power automatic wire tensioner of claim 8, wherein: The bottom end of the first engaging groove (55) is provided with the first hitting piece (53) in correspondence, the bottom end of the second engaging groove (56) is provided with the third hitting piece (59) in correspondence, and the bottom end of the third engaging groove (57) is provided with the second hitting piece (58) in correspondence.

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