Electric power automatic wire tightening device for hot-line work

Abstract

The invention discloses an electric power automatic wire tightening device for hot-line work, relates to the technical field of wire tighteners, and aims to solve the problems that in the hot-line work process, two insulating wire tighteners need to be used, when two groups of people tighten wires respectively, the take-up lengths are different each time, stress on the two sides of a cross arm is inconsistent, lateral deviation of different degrees occurs, operation is extremely inconvenient, and the work efficiency is high. According to the invention, convenient adsorption connection with the cross arm angle iron is realized through the magnet, all parts in the telescopic device work cooperatively to accurately control the action of the push rod, and the electric wire can be tightened effectively and stably in cooperation with parts such as a connecting rope, a double-end rope, a mousing hook and a wire clamping device. According to the utility model, an automatic wire tightening function is realized, and tool use and shielding measures are reduced, so that the operation safety and efficiency are improved, the physical output of operators is reduced, and the safety, reliability and operation convenience of electric power automatic wire tightening in hot-line work are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of wire tensioners, in particular to an automatic electric wire tensioner for live working. Background Art

[0002] With the development of society, people have higher and higher requirements for power supply reliability. In order to deeply implement the concept of "no power outage, multiple uses after one outage", strict power outage control and strengthening of live maintenance are the starting points to give full play to the role of live operation centers and fully promote non-stop power supply operations in distribution networks. The insulating glove operation method of converting straight poles to tension poles is a commonly used project in non-stop power supply operations, which can solve many practical problems in distribution network operation and maintenance and construction. During the live operation process, there are many operation points where the original branch line insulators need to be replaced with tension insulators. The operation process requires the preparation of insulated boom trucks and a number of operators who are proficient in line construction skills. They are divided into groups and work on both sides of the crossarm.

[0003] However, during live working, two insulated wire tensioners are needed. When two groups of people tighten the wires separately, the length of the wires reeled in each time is different, resulting in inconsistent force on both sides of the crossarm and varying degrees of lateral deviation. The operation is extremely inconvenient, which greatly increases the working time and safety risks.

[0004] In view of the above problems, an automatic electric wire tightening device for live working is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic electric wire tightening device for live working, which solves the problem of complicated wire tightening operation in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an automatic electric wire tightening device for live working, comprising an electric wire and a cross-arm angle iron, wherein the electric wire is provided with a cross-arm angle iron, and the cross-arm angle iron is used to support the electric wire, and a wire tightening assembly is installed on the cross-arm angle iron, and the wire tightening assembly comprises a connecting cover, and a magnet is connected to the connecting cover, and the connecting cover and the cross-arm angle iron are adsorbed together, and a telescopic device is connected to both ends of the connecting cover by hexagonal bolts, and a motor control line, a power line and a brake line are led out of the telescopic device, and the telescopic device is connected to a control system;

[0007] The output end of the telescopic device is connected to a connecting rope, the side of the connecting rope away from the telescopic device is connected to a double-headed rope, the end of the double-headed rope is connected to an anti-detachment hook, the anti-detachment hook is connected to a clamping arm, the outer wall of the clamping arm is connected to a wire clamp, the wire clamp is fixedly connected to a wire clamping groove, and the wire clamping groove is used to fix the wire;

[0008] The control system consists of a touch screen PLC integrated machine, a servo drive, and a lithium battery. The touch screen PLC integrated machine is connected to a lithium battery pack via a power line, and the output port of the PLC integrated machine is connected to the servo drive via a communication cable.

[0009] Preferably, the wire gripper is provided with an emergency component, the emergency component comprises a connection arm, the wire gripper is connected with the connection arm, the surface of the connection arm is connected with a pressure line, the top of the pressure line is installed with a balance bar, the top of the wire gripper is connected with a positioning shell, and the balance bar runs through the interior of the positioning shell;

[0010] The surface of the balance bar is connected with a limit assembly, and the limit assembly includes a positioning plate, the positioning plate is connected to the balance bar, the positioning plate and the balance bar are fixedly connected, the top of the positioning plate is connected to a supporting arm, the top of the supporting arm is connected to a supporting small arm, a first spring rod is connected between the positioning plate and the supporting arm, and a second spring rod is connected between the supporting arm and the supporting small arm, so that the top of the supporting small arm is connected to a limit head, and a limit pressure block is arranged on the top of the limit head, and the limit pressure block is fixedly connected to the inner wall of the positioning shell;

[0011] The bottom surface of the limit pressure block is connected with a positioning assembly, and the positioning assembly includes a snap block. The bottom surface of the limit pressure block is connected with a snap block, and the top surface of the limit head is provided with a first engaging groove, and the snap block is embedded in the first engaging groove.

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

[0013] Preferably, the top surface of the limiting head is inclined, and the bottom surface of the limiting pressure block 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 pressure block.

[0014] Preferably, a sound transmission chamber is opened inside the limit head, and a second striking piece, a third striking piece and a first striking piece are embedded inside the sound transmission chamber. The second striking piece, the third striking piece and the first striking piece are arranged side by side inside the sound transmission chamber, and the lengths of the second striking piece, the third striking piece and the first striking piece are different. The second striking piece runs through the interior of the sound transmission chamber, the length of the third striking piece is only one half of the depth of the sound transmission chamber, and the length of the first striking piece is only one third of the depth of the sound transmission chamber.

[0015] Preferably, the top surface of the limit head is also provided with a second meshing groove and a third meshing groove, and the first meshing groove, the second meshing groove and the third meshing groove are arranged side by side on the top surface of the limit head, and the top surface of the limit head is fixedly connected to a limit strip, and the limit strip is used to separate the first meshing groove, the second meshing groove and the third meshing groove.

[0016] Preferably, the first meshing groove has the longest length, the third meshing groove has the shortest length, and the lengths of the first meshing groove, the second meshing groove and the third meshing groove decrease step by step.

[0017] Preferably, the groove spacing between the first engaging grooves is small, and the groove spacing on the other side is large. As the height of the first engaging grooves opened on the limit head gradually increases, the groove spacing opened on the limit head also increases.

[0018] Preferably, the engaging block corresponds to the first engaging groove, the second engaging groove and the third engaging groove in sequence, and the engaging block is embedded in the first engaging groove, the second engaging groove and the third engaging groove to limit the relative position of the limiting pressure block and the limiting head.

[0019] Preferably, a first striking piece is correspondingly arranged at the bottom end of the first meshing groove, a third striking piece is correspondingly arranged at the bottom end of the second meshing groove, and a second striking piece is correspondingly arranged at the bottom end of the third meshing groove.

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

[0021] 1. The present invention provides an automatic power line tightening device for live working, which realizes convenient adsorption connection with the cross arm angle iron through magnets. The coordinated operation of various components in the telescopic device can accurately control the action of the push rod, and can effectively and stably tighten the wires in conjunction with the connecting rope, double-headed rope, anti-unhooking, wire clamp and other components. The automatic line tightening function is realized, the use of tools and shielding measures are reduced, thereby improving the safety and efficiency of the operation, reducing the physical exertion of the operators, and greatly improving the safety, reliability and operational convenience of the automatic power line tightening device in live working.

[0022] 2. The present invention provides an automatic wire tightening device for live working. If the wire harness is stuck during tightening, the misalignment design of the limit head and the limit pressure block can cleverly remove the influence of the pulling force on the wire, prevent the wire from being over-pulled, and buy enough time for the staff to troubleshoot the problem. In addition, during the misalignment process, the jumping of the engaging block in different meshing grooves will hit the corresponding striking piece to produce a warning sound, and because the meshing groove structure and the striking piece are different, the frequency, volume and timbre of the sound will change, so that the staff can accurately grasp the stage of stretching and the duration of wire jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the electric wire and the cross arm angle iron of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the tightening wire assembly of the present invention;

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

[0027] Figure 5 It is a schematic diagram of the structure of the clamping line and the connecting arm of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the positioning shell and the balancing rod of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the limiting head and the limiting pressing block of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the engaging block and the sound transmission chamber of the present invention;

[0031] Fig. 9 It is a schematic diagram of the exploded structure of the limiting head and the limiting pressing block of the present invention;

[0032] Fig.10 It is a schematic structural diagram of the limiting strip and the first engaging groove of the present invention;

[0033] Fig.11 It is a schematic diagram of the cross-sectional structure of the limit head of the present invention.

[0034] In the figure: 11, cross arm angle iron; 12, electric wire; 2, tightening wire assembly; 21, connecting cover; 22, telescopic device; 23, connecting rope; 24, double-headed rope; 25, wire clamp; 26, anti-unhooking; 27, clamping arm; 28, wire clamping groove; 3, emergency assembly; 31, clamping wire; 32, connecting arm; 33, pressing wire; 34, positioning shell; 35, balance bar; 4, limiting assembly; 41, positioning plate; 42, supporting arm; 43, first spring rod; 44, supporting arm; 45, second spring rod; 46, limiting head; 47, limiting pressure block; 5, positioning assembly; 51, locking block; 52, sound transmission chamber; 53, first striking piece; 54, limiting strip; 55, first meshing groove; 56, second meshing groove; 57, third meshing groove; 58, second striking piece; 59, third striking piece. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0037] Combination Figure 1-Figure 11 The present invention discloses an automatic electric wire tightening device for live working, comprising an electric wire 12 and a cross arm angle iron 11, a wire tightening assembly 2 is installed on the cross arm angle iron 11, the wire tightening assembly 2 comprises a connecting upper cover 21, a magnet is connected to the connecting upper cover 21, the connecting upper cover 21 and the cross arm angle iron 11 are adsorbed together, a telescopic device 22 is connected to both ends of the connecting upper cover 21 by hexagonal bolts, the telescopic device 22 comprises a motor, a gear, a screw rod, a nut, a push rod and a limit switch, the gear is meshingly connected with the motor shaft for transmitting the rotational motion of the motor, a screw rod is meshingly connected with the gear, a nut is connected to the outer surface of the screw rod, a push rod is connected to the nut, and limit switches are connected on both sides of the push rod for detecting the limit position of the push rod to prevent excessive extension or compression, a motor control line, a power line and a brake line are led out of the telescopic device 22, and the telescopic device 22 is connected to the control system;

[0038] The output end of the telescopic device 22 is connected to a connecting rope 23, and the side of the connecting rope 23 away from the telescopic device 22 is connected to a double-headed rope 24, and the end of the double-headed rope 24 is connected to an anti-slip hook 26, and a clamping arm 27 is connected to the anti-slip hook 26. The outer wall of the clamping arm 27 is connected to a wire clamp 25, and the anti-slip hook 26 and the clamping arm 27 are movably connected. The side of the clamping arm 27 away from the anti-slip hook 26 is movably connected to the wire clamp 25, and the end of the wire clamp 25 is also connected to the anti-slip hook 26. The wire clamp 25 is fixedly connected with a wire clamping groove 28, and the wire clamping groove 28 is used to fix the wire 12;

[0039] The control system consists of a touch screen PLC all-in-one machine, a servo drive, and a lithium battery. The touch screen PLC all-in-one machine is connected to the lithium battery pack through a power cord, and the output port of the PLC all-in-one machine is connected to the servo drive through a communication cable;

[0040] The touch screen PLC all-in-one machine is a device that integrates 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 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 drive receives control signals from the PLC and converts current and voltage. The lithium battery pack provides a stable DC power supply for the system. It is composed of multiple single cells and is monitored and managed through the battery management system to ensure the safety and efficient operation of the battery.

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

[0042] S1: Connect the motor control line, power line, brake line of the motor to the corresponding line 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 main power cord to the lithium battery. Before plugging in the main power, check whether all components are firmly installed and whether all connection parts are well sealed 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 power-on status of the PLC;

[0045] S4: If the power is turned on successfully, you will hear a buzzer alarm, which is a safety reminder alarm. After ensuring the safety of the operation, press the reset button to eliminate the alarm sound;

[0046] S5: Click the start button to start the operating system. The green operating indicator light is always on and the system starts running. If you need to stop the system after the operation, you can press the stop button to end the operation. If you encounter an emergency during the operation, you can press the emergency stop button for protection;

[0047] S6: When the system is running, operate the motor rotation switch to move the corresponding motor. Rotate it to the target position and release the knob to maintain the position. During the rotation button operation, the corresponding indicator light will be on. If the motor indicator light is not on, you need to shut down the system and turn off the power for inspection. If everything is OK, restart the button;

[0048] S7: During the operation of the equipment, pay close attention to the operating status of the equipment. If there is any abnormality, stop the equipment immediately for inspection;

[0049] S8: After the equipment is shut down, it should be cleaned and maintained in accordance with the operating procedures to extend the service life of the equipment.

[0050] This control system enables users to easily master the operation of the equipment. Secondly, the power-off protection is set, which can protect the motor brake in the event of a sudden power outage. Secondly, it is easy to disassemble and repair, reducing maintenance costs and downtime.

[0051] With the continuous expansion and upgrading of the power network, the requirements for power line construction efficiency are increasing day by day, and automatic wire tightening devices have emerged and have been widely used. In normal operation, traditional automatic wire tightening devices can effectively apply appropriate tension to the wire harness and tighten the wire harness to a predetermined tension state, thereby ensuring the stable installation of the line. However, in the actual wire tightening process, various complex working conditions and emergencies are often encountered;

[0052] When the wire harness gets stuck at the pulley, wire trough or other tensioning components, the automatic tensioning device usually works continuously according to the preset tension program and cannot sense and adapt to the change of abnormal resistance in time, which will cause it to continue to output a large tension. This excessive tension acts on the stuck wire harness, causing the wire harness to bear tensile stress far beyond its design tolerance. As a key carrier of power transmission, the material of the wire harness usually has a certain elastic limit and tensile strength. Under the long-term action of excessive tension, the metal wire or fiber structure inside the wire harness will gradually undergo irreversible plastic deformation, and the originally tightly arranged structure will be elongated and thinned, resulting in a smaller diameter of the wire harness and a reduction in overall strength.

[0053] In order to overcome the defect of the existing automatic wire tightening device for live working, which is easy to cause the wire harness to be stretched, deformed or even broken when the wire harness is stuck, a wire tightening device is urgently needed 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 component 3, which includes a connecting arm 32. The wire clamp 25 is connected with the connecting arm 32. The wire clamp 25 and the connecting arm 32 are slidably connected. The surface of the connecting arm 32 is connected with a pressing line 33. The top of the pressing line 33 is installed with a balance bar 35. The top of the wire clamp 25 is connected with a positioning shell 34. The balance bar 35 runs through the interior of the positioning shell 34. The upper surface of the wire clamp groove 28 is connected with a clamping line 31. The upper surface of the clamping line 31 is set to an arc shape. The clamping line 31 and the pressing line 33 correspond to each other. The clamping line 31 and the pressing line 33 are used to clamp the wire 12;

[0055] In order to improve the clamping of the wire 12, the wire 12 is clamped by the combination of the clamping line 31 and the connecting arm 32. However, in daily use, when the anti-detachment hook 26 is pulled by the force, the clamping arm 27 is driven to deflect at an angle, so that the wire clamping groove 28 provided on the clamping arm 27 moves upward. At this time, the movement of the wire clamping groove 28 makes the clamping line 31 and the pressing line 33 approach each other continuously, thereby achieving the clamping effect on the wire 12. After clamping the wire 12, the wire 12 is driven by the traction of the wire clamp 25, thereby achieving the function of tightening the wire. In order to avoid abnormal deformation of the wire harness during the tightening process, the contact area with the wire 12 is increased by the clamping line 31 and the pressing line 33, so that the force area of ​​the wire 12 is larger when pulling, and the local pressure is reduced, which can well avoid the problem of local damage.

[0056] In addition, when the wire is tightened, if the wire harness is stuck and cannot be pulled normally, the setting of the limit component 4 and the positioning component 5 also plays a certain degree of protection and early warning function, so as to prevent the wire 12 from being pulled and damaged. The specific operation is as follows:

[0057] The surface of the balance bar 35 is connected to the limit assembly 4, and the limit assembly 4 includes a positioning plate 41, the positioning plate 41 is connected to the balance bar 35, the positioning plate 41 and the balance bar 35 are fixedly connected, the top of the positioning plate 41 is connected to a supporting arm 42, the top of the supporting arm 42 is connected to a supporting arm 44, a first spring rod 43 is connected between the positioning plate 41 and the supporting arm 42, and a second spring rod 45 is connected between the supporting arm 42 and the supporting arm 44, so the top of the supporting arm 44 is connected to a limit head 46, and a limit pressure block 47 is arranged at the top of the limit head 46, the top surface of the limit head 46 is inclined, and the bottom surface of the limit pressure block 47 is also inclined, the inclination angle of the top surface of the limit head 46 is consistent with the inclination angle of the bottom surface of the limit pressure block 47, and the limit pressure block 47 is fixedly connected to the inner wall of the positioning shell 34;

[0058] The bottom surface of the limit pressing block 47 is connected with the positioning assembly 5, and the positioning assembly 5 includes a clamping block 51. The bottom surface of the limit pressing block 47 is connected with the clamping block 51, and the top surface of the limit head 46 is provided with a first meshing groove 55, and the clamping block 51 is embedded in the first meshing groove 55.

[0059] A sound transmission chamber 52 is provided inside the limit head 46, and a second striking piece 58, a third striking piece 59 and a first striking piece 53 are embedded inside the sound transmission chamber 52. The second striking piece 58, the third striking piece 59 and the first striking piece 53 are arranged side by side inside the sound transmission chamber 52, and the lengths of the second striking piece 58, the third striking piece 59 and the first striking piece 53 are different. The second striking piece 58 passes through the inside of the sound transmission chamber 52, the length of the third striking piece 59 is only half of the depth of the sound transmission chamber 52, and the length of the first striking piece 53 is only one third of the depth of the sound transmission chamber 52.

[0060] The top surface of the limit head 46 is also provided with a second meshing groove 56 and a third meshing groove 57. The first meshing groove 55, the second meshing groove 56 and the third meshing groove 57 are arranged side by side on the top surface of the limit head 46. The top surface of the limit head 46 is fixedly connected to the limit strip 54. The limit strip 54 is used to separate the first meshing groove 55, the second meshing groove 56 and the third meshing groove 57. The length of the first meshing groove 55 is the longest, and the length of the third meshing groove 57 is the shortest. The lengths of the first meshing groove 55, the second meshing groove 56 and the third meshing groove 57 decrease step by step. The groove spacing between the first meshing grooves 55 is small, and the groove spacing on the other side is large. As the height of the first meshing groove 55 opened on the limit head 46 gradually increases, the groove spacing opened on the limit head 46 also increases.

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

[0062] When the wire harness is stuck, because the connecting arm 32 and the wire clamp 25 are slidably connected, the positioning plate 41, the supporting arm 42, the first spring rod 43, the supporting arm 44, the second spring rod 45 and the limiting head 46 are only embedded in the interior of the positioning shell 34 and have no connection with the positioning shell 34. When the wire 12 is stuck, the pressing line 33 is wrapped around the wire 12 and cannot move. At this time, the pulling of the wire clamp 25 only drives the positioning shell 34 and the inner limiting pressure block 47 to move. At this time, the limiting pressure block 47 and the limiting head 46 are misaligned. At the same time, the wire clamp 25 and the connecting arm 32 are also in a sliding state, and the misalignment between the two is used to alleviate the influence of the pulling force on the wire 12.

[0063] During the stage where the limit head 46 and the limit pressing block 47 are misaligned, the movement of the limit pressing block 47 cannot drive the limit head 46 to move, so the wire 12 cannot continue to move forward, which protects the wire 12 and gives the staff enough time to troubleshoot the problem.

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

[0065] When the wire 12 is not stuck, the movement of the positioning shell 34 drives the movement of the limit pressure block 47. When the limit pressure block 47 moves, it drives the limit head 46 to move. This is because the engaging block 51 set at the bottom end of the limit pressure block 47 is engaged with the inside of the first engaging groove 55 opened on the top surface of the limit head 46. Through the engagement between the engaging block 51 and the first engaging groove 55, the limit head 46 is driven to move. When the limit head 46 moves, it also drives the positioning plate 41 to move. When the positioning plate 41 moves, it drives the balance bar 35, and then the balance bar 35 drives the pressure line 33 to move. When the pressure line 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 stuck and cannot be pulled, the movement of the limit pressing block 47 cannot drive the movement of the limit head 46. At this time, because the limit pressing block 47 drives the engaging block 51 when moving, the positions of the pressure line 33, the positioning plate 41 and the limit head 46 cannot be changed due to the jamming of the wire 12. At this time, the limit pressing block 47 will be misaligned with the limit head 46. During the misalignment process, the influence of the pulling force on the wire 12 is removed. When misaligned, the engaging block 51 repeatedly jumps inside the first meshing groove 55. This is because the force causes the engaging block 51 to deform. As the engaging block 51 continues to move, it will move and contact the second meshing groove 56, and finally contact the third meshing groove 57. When the engaging block 51 continuously jumps inside the first meshing groove 55 When the clamping block 51 jumps into the first meshing groove 55, it will come into contact with 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 is transmitted through the sound transmission chamber 52, so that the staff can hear the sound produced by the impact, which can also serve as a warning. In addition, in order to let the staff know more accurately what stage the stretching is in, the first meshing groove 55, the second meshing groove 56 and the third meshing groove 57 are arranged on the limit head 46, and the first striking piece 53, the second striking piece 58 and the third striking piece 59 are arranged in the sound transmission chamber 52, so that the striking frequency can be changed, and the length of time the wire 12 is stuck can be further inferred according to the striking frequency of the clamping block 51.

[0067] When the engaging block 51 is embedded in the first meshing groove 55, the engaging block 51 needs to jump in the first meshing groove 55, and the starting point of the jump is defined as the front end, and the end of the jump is the rear end. In the initial stage, the engaging block 51 is engaged with the front end of the first meshing groove 55. At this time, as the positions of the two move, the engaging block 51 moves toward the rear end of the first meshing groove 55. Since the front end of the first meshing groove 55 has a low density, that is, the density of the through holes is low, and the spacing between the through holes is large, the engaging block 51 jumps to the other end. The distance moved by the outer through hole is far. Under the condition of balanced pulling speed, the jumping frequency of the engaging block 51 is low. At this time, the frequency of the engaging block 51 hitting the first striking piece 53 is also low. At this time, the frequency of the warning sound is low. As the engaging block 51 continues to move toward the rear end of the first meshing groove 55, the spacing of the through holes becomes smaller and smaller. At this time, the jumping frequency of the engaging block 51 is also higher and higher, and the frequency of hitting the first striking piece 53 is also accelerated. At this time, the staff can make a preliminary judgment based on the hitting frequency;

[0068] In addition, the sound of hitting also increases gradually. With the movement of the engaging block 51, it only engages with the first engaging groove 55 at first, and then engages with the second engaging groove 56. Finally, the engaging block 51 engages with the first engaging groove 55, the second engaging groove 56 and the third engaging groove 57 respectively. Since the bottom ends of the second engaging groove 56 and the third engaging groove 57 are provided with the third striking piece 59 and the second striking piece 58, the engaging block 51 will hit the first striking piece 53, the third striking piece 59 and the second striking piece 58 at the same time, and the volume of the hitting sound is also increased. Due to the different lengths of the first striking piece 53, the third striking piece 59 and the second striking piece 58, the sound produced by the striking of the engaging block 51 is also different, which also serves as a warning.

[0069] Finally, in order to make the limit head 46 and the limit pressure block 47 fit more closely, they are supported by the support arm 44. Under the action of the first spring rod 43 and the support arm 42, the two are kept in close contact with each other. As the limit pressure block 47 and the limit head 46 are continuously misaligned, until the limit head 46 and the limit pressure block 47 are completely separated, the movement of the limit pressure block 47 will not drive the limit head 46. This protects the wire 12 and prevents the wire 12 from being pulled excessively and broken.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic electric wire tightening device for live working, comprising an electric wire (12) and a cross arm angle iron (11), characterized in that: A cross-arm angle iron (11) is provided on the electric wire (12), and the cross-arm angle iron (11) is used to support the electric wire (12). A tensioning assembly (2) is installed on the cross-arm angle iron (11), and the tensioning assembly (2) comprises a connecting cover (21), and a magnet is connected to the connecting cover (21). The connecting cover (21) and the cross-arm angle iron (11) are adsorbed together. The two ends of the connecting cover (21) are connected to a telescopic device (22) through hexagonal bolts. A motor control line, a power line and a brake line are led out of the telescopic device (22), and the telescopic device (22) is connected to the control system; The output end of the telescopic device (22) is connected to a connecting rope (23), a side of the connecting rope (23) away from the telescopic device (22) is connected to a double-ended rope (24), an end of the double-ended rope (24) is connected to an anti-detachment hook (26), a clamping arm (27) is connected to the anti-detachment hook (26), an outer wall of the clamping arm (27) is connected to a wire clamp (25), a wire clamping groove (28) is fixedly connected to the wire clamp (25), and the wire clamping groove (28) is used to fix the electric wire (12); The control system consists of a touch screen PLC integrated machine, a servo drive, and a lithium battery. The touch screen PLC integrated machine is connected to a lithium battery pack via a power line, and the output port of the PLC integrated machine is connected to the servo drive via a communication cable.

2. The automatic electric wire tightening device for live working according to claim 1, characterized in that: The wire gripper (25) is provided with an emergency assembly (3), the emergency assembly (3) comprises a connecting arm (32), the wire gripper (25) is connected with the connecting arm (32), the surface of the connecting arm (32) is connected with a pressure line (33), the top end of the pressure line (33) is provided with a balance bar (35), the top end of the wire gripper (25) is connected with a positioning shell (34), and the balance bar (35) runs through the interior of the positioning shell (34); The surface of the balance bar (35) is connected to a limit assembly (4), and the limit assembly (4) includes a positioning plate (41), and the positioning plate (41) is connected to the balance bar (35). The positioning plate (41) and the balance bar (35) are fixedly connected, and the top of the positioning plate (41) is connected to a supporting arm (42), and the top of the supporting arm (42) is connected to a supporting arm (44). A first spring rod (43) is connected between the positioning plate (41) and the supporting arm (42), and a second spring rod (45) is connected between the supporting arm (42) and the supporting arm (44), so that the top of the supporting arm (44) is connected to a limit head (46), and a limit pressure block (47) is arranged at the top of the limit head (46), and the limit pressure block (47) is fixedly connected to the inner wall of the positioning shell (34); The bottom surface of the limit pressure block (47) is connected to a positioning assembly (5), and the positioning assembly (5) comprises a snap-fit ​​block (51). The bottom surface of the limit pressure block (47) is connected to the snap-fit ​​block (51), and the top surface of the limit head (46) is provided with a first engaging groove (55), and the snap-fit ​​block (51) is embedded in the first engaging groove (55).

3. The automatic electric wire tightening device for live working according to claim 2, characterized in that: The upper surface of the wire clamping groove (28) is connected to a clamping strip (31), the upper surface of the clamping strip (31) is arranged in an arc shape, the clamping strip (31) and the pressing strip (33) correspond to each other, and the clamping strip (31) and the pressing strip (33) are used to clamp the electric wire (12).

4. The automatic electric wire tightening device for live working according to claim 2, characterized in that: The top surface of the limiting head (46) is inclined, and the bottom surface of the limiting pressure block (47) is also inclined, and the inclination angle of the top surface of the limiting head (46) and the inclination angle of the bottom surface of the limiting pressure block (47) are consistent.

5. The automatic electric wire tightening device for live working according to claim 4, characterized in that: A sound transmission chamber (52) is provided inside the limit head (46), and a second striking piece (58), a third striking piece (59) and a first striking piece (53) are embedded inside the sound transmission chamber (52). The second striking piece (58), the third striking piece (59) and the first striking piece (53) are arranged side by side inside the sound transmission chamber (52), and the lengths of the second striking piece (58), the third striking piece (59) and the first striking piece (53) are different. The second striking piece (58) passes through the interior of the sound transmission chamber (52), the length of the third striking piece (59) is only half of the depth of the sound transmission chamber (52), and the length of the first striking piece (53) is only one third of the depth of the sound transmission chamber (52).

6. The automatic electric wire tightening device for live working according to claim 2, characterized in that: The top surface of the limit head (46) is also provided with a second meshing groove (56) and a third meshing groove (57); the first meshing groove (55), the second meshing groove (56) and the third meshing groove (57) are arranged side by side on the top surface of the limit head (46); the top surface of the limit head (46) is fixedly connected to a limit strip (54); the limit strip (54) is used to separate the first meshing groove (55), the second meshing groove (56) and the third meshing groove (57).

7. The automatic electric wire tightening device for live working according to claim 6, characterized in that: The first meshing groove (55) has the longest length, the third meshing groove (57) has the shortest length, and the lengths of the first meshing groove (55), the second meshing groove (56) and the third meshing groove (57) decrease step by step.

8. The automatic electric wire tightening device for live working according to claim 7, characterized in that: The groove spacing between the first engagement grooves (55) is small, and the groove spacing on the other side is large. As the height of the first engagement grooves (55) opened on the limit head (46) gradually increases, the groove spacing opened on the limit head (46) also increases.

9. The automatic electric wire tightening device for live working according to claim 2, characterized in that: The engaging block (51) corresponds to the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57) in sequence, and the engaging block (51) is embedded in the first engaging groove (55), the second engaging groove (56) and the third engaging groove (57) to limit the relative position of the limiting pressure block (47) and the limiting head (46).

10. The automatic electric wire tightening device for live working according to claim 9, characterized in that: The bottom end of the first meshing groove (55) is correspondingly provided with a first striking piece (53), the bottom end of the second meshing groove (56) is correspondingly provided with a third striking piece (59), and the bottom end of the third meshing groove (57) is correspondingly provided with a second striking piece (58).

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