Overhead line electric tensioner

Abstract

This invention discloses an electric tensioner for overhead power lines, comprising a power system, a control system, an actuator, and a safety protection system. The power system includes a drive motor, a reducer, and a transmission mechanism. The actuator includes a tensioning shaft, a tensioning rope, a clamp, and a limiting mechanism. One end of the tensioning shaft is connected to the drive motor, and tension sensors are installed at both ends of the shaft. The safety protection system includes an emergency braking mechanism, an overload protection device, an electrical protection system, and a mechanical protection device. The control system includes a main control unit, a motor control unit, a battery management unit, and a wireless communication unit. The main control unit is connected to the motor control unit, the battery management unit, and the wireless communication unit. The control system connects to the power system and the actuator through the motor control unit. This invention can improve construction efficiency, shorten the construction period, reduce safety risks during operation, achieve precise control of the tensioning process, and ensure the uniformity and stability of the line tension.

Description

Technical Field

[0001] This invention belongs to the field of overhead line tensioning technology, specifically relating to an electric tensioner for overhead lines. Background Technology

[0002] In the construction and maintenance of power systems, overhead lines serve as an important channel for power transmission, and their stability and safety are of paramount importance. During the laying or inspection of overhead lines, it is crucial to maintain the appropriate tension of the overhead conductors, as this directly affects whether the power lines can be used normally. If the power lines are too tight, the conductors will bear excessive tension when encountering thermal expansion and contraction or strong winds and freezing conditions, which may lead to line breakage or pole collapse. If the power lines are too loose, the conductors will have excessive sag, and they may easily collide and cause short circuits during strong winds.

[0003] Traditional overhead line tensioning operations mainly rely on manual operation, which is time-consuming and labor-intensive. This is not only inefficient but also poses safety hazards. Furthermore, manual operation is prone to unstable precision control, and uneven tension control can easily cause inconsistent overall sag, affecting the operation results.

[0004] Therefore, it is necessary to develop an electric tensioner for overhead lines to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric tensioner for overhead lines, which reduces manual operation, improves construction efficiency, shortens the construction period, reduces safety risks during operation, achieves precise control of the tensioning process, and ensures the uniformity and stability of line tension.

[0006] The objective of this invention is achieved as follows: an electric tensioner for overhead lines, comprising a power system, a control system, an actuator, and a safety protection system; The power system includes a drive motor mounted on a support base, the drive motor being connected to a reducer, and the output end of the reducer being connected to an actuator via a transmission mechanism. The actuator includes a tightening shaft, a tightening rope, a clamp, and a limiting mechanism. The tightening shaft is rotatably mounted on a support base via a rotating bracket. One end of the tightening shaft is connected to a drive motor via a transmission mechanism. A tightening rope is mounted on the tightening shaft, and a clamp connected to an overhead line is mounted at the end of the tightening rope. Tension sensors are mounted at both ends of the tightening shaft. The control system includes a main control unit, a motor control unit, a battery management unit, and a wireless communication unit. The main control unit is connected to the motor control unit, the battery management unit, and the wireless communication unit. The control system connects to the power system and the actuator through the motor control unit. The battery management unit is connected to the drive power supply to ensure the safe use and long lifespan of the battery. The wireless communication unit remotely connects to the human-machine interface unit for data transmission and communication. The safety protection system includes an emergency braking mechanism, an overload protection device, an electrical protection system, and a mechanical protection device. The emergency braking mechanism is used to quickly stop the equipment in an emergency to prevent accidents. The overload protection device is used to monitor the load of the drive motor and automatically cut off the power supply when overloaded to protect the motor and equipment from damage. The electrical protection system includes leakage protection and short circuit protection to ensure the electrical safety of the equipment. The mechanical protection device includes a protective cover installed on the outside of the device to prevent operators from contacting dangerous parts.

[0007] Furthermore, the reducer is implemented using a planetary reducer.

[0008] Furthermore, the transmission mechanism is implemented using a belt, pulley assembly, or gear and chain assembly.

[0009] Furthermore, the tensile sensor is a resistance strain gauge type sensor.

[0010] Furthermore, the main control unit employs a microprocessor or a programmable logic controller to receive input signals, process data, and issue control commands.

[0011] Furthermore, the motor control unit includes a data acquisition module, a data processing module, and a motor control module. The data acquisition module is connected to the drive motor and the tension sensor respectively, and is used to acquire the driving motor operation data and the tension sensor monitoring data. The data processing module analyzes and processes the data, and the motor control module controls the driving motor operation status through the data analysis and processing structure.

[0012] Furthermore, the motor control unit employs a PID control algorithm to adjust the output power of the drive motor based on feedback from the tension sensor.

[0013] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) By adopting an electric automated operation method, the tightening operation can be completed faster, reducing the labor intensity of operators, improving work efficiency and comfort, reducing manpower consumption, and reducing construction costs; (2) By setting up sensors and other devices to monitor the tension and motor operation status, high-precision tension control function is realized to ensure the tension uniformity and stability of the overhead line, effectively reduce the faults caused by uneven line tension, and improve the overall stability of the power system. (3) By setting up multiple safety protection mechanisms, the equipment can be operated stably and reliably, and the safety during the line tightening operation can be effectively guaranteed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0015] Figure 2 This is a top view of the structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the principle of the present invention.

[0017] In the diagram: 1. Support base; 2. Drive motor; 3. Reducer; 4. Transmission mechanism; 5. Tensioning shaft; 6. Tensioning rope; 7. Wire clamp; 8. Tension sensor. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, an electric tensioner for overhead lines includes a power system, a control system, an actuator, and a safety protection system.

[0020] The power system includes a drive motor mounted on a support base, the drive motor being connected to a reducer, and the output end of the reducer being connected to an actuator via a transmission mechanism.

[0021] Preferably, the reducer is implemented using a planetary reducer; the transmission mechanism is implemented using a belt and pulley assembly or a gear and chain assembly.

[0022] The actuator includes a tightening shaft, a tightening rope, a wire clamp, and a limiting mechanism. The tightening shaft is rotatably mounted on a support base via a rotating bracket. One end of the tightening shaft is connected to a drive motor via a transmission mechanism. A tightening rope is mounted on the tightening shaft, and a wire clamp connected to an overhead line is mounted at the end of the tightening rope. Tension sensors are mounted at both ends of the tightening shaft. The limiting mechanism is used to limit the range of motion of the tightening shaft or the wire clamp to prevent the device from exceeding the predetermined range during the tightening process.

[0023] Preferably, the tensile sensor is a resistance strain gauge type sensor.

[0024] The safety protection system includes an emergency braking mechanism, an overload protection device, an electrical protection system, and a mechanical protection device. The emergency braking mechanism is used to quickly stop the equipment in an emergency to prevent accidents. The overload protection device is used to monitor the load of the drive motor and automatically cut off the power supply when overloaded to protect the motor and equipment from damage. The electrical protection system includes leakage protection and short circuit protection to ensure the electrical safety of the equipment. The mechanical protection device includes a protective cover installed on the outside of the device to prevent operators from contacting dangerous parts.

[0025] The control system includes a main control unit, a motor control unit, a battery management unit, and a wireless communication unit. The main control unit is connected to the motor control unit, the battery management unit, and the wireless communication unit. The control system is connected to the power system and the actuator through the motor control unit. The battery management unit is connected to the drive power supply to ensure the safe use and long life of the battery. The wireless communication unit is remotely connected to the human-machine interaction unit for data transmission and communication.

[0026] Preferably, the main control unit is a microprocessor or a programmable logic controller, used to receive input signals, process data and issue control commands.

[0027] Preferably, the motor control unit includes a data acquisition module, a data processing module, and a motor control module. The data acquisition module is connected to the drive motor and the tension sensor respectively, and is used to acquire the driving motor operation data and the tension sensor monitoring data. The data processing module analyzes and processes the data, and the motor control module controls the driving motor operation status through the data analysis and processing structure.

[0028] Preferably, the motor control unit employs a PID control algorithm to adjust the output power of the drive motor based on feedback from the tension sensor.

[0029] In the specific implementation of this invention, the wire clamp is connected to the cable, and the drive motor is started to drive the tightening shaft to rotate, which is used to wind and tighten the cable. The tension of the cable is monitored in real time by the tension sensor until the overhead conductor maintains an appropriate tightness. Taking an average of 130 overhead power transmission line conductor operations per year as an example, the traditional mode requires 3 people and 2 hours to complete the operation. After using the overhead line electric tightening device of this invention, it only requires 2 people and 2 hours to complete the operation. Calculated at an hourly wage of 120 yuan / hour, the maintenance cost saved due to cable wear is estimated to be 200 yuan / operation. It is estimated that the company can save [(3*2-2*2)*120+200]*130=57,200 yuan in costs per year.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. An electric tensioner for overhead power lines, characterized in that: This includes the power system, control system, actuators, and safety protection system; The power system includes a drive motor mounted on a support base, the drive motor being connected to a reducer, and the output end of the reducer being connected to an actuator via a transmission mechanism. The actuator includes a tightening shaft, a tightening rope, a clamp, and a limiting mechanism. The tightening shaft is rotatably mounted on a support base via a rotating bracket. One end of the tightening shaft is connected to a drive motor via a transmission mechanism. A tightening rope is mounted on the tightening shaft, and a clamp connected to an overhead line is mounted at the end of the tightening rope. Tension sensors are mounted at both ends of the tightening shaft. The control system includes a main control unit, a motor control unit, a battery management unit, and a wireless communication unit. The main control unit is connected to the motor control unit, the battery management unit, and the wireless communication unit. The control system connects to the power system and the actuator through the motor control unit. The battery management unit is connected to the drive power supply to ensure the safe use and long lifespan of the battery. The wireless communication unit remotely connects to the human-machine interface unit for data transmission and communication. The safety protection system includes an emergency braking mechanism, an overload protection device, an electrical protection system, and a mechanical protection device. The emergency braking mechanism is used to quickly stop the equipment in an emergency to prevent accidents. The overload protection device is used to monitor the load of the drive motor and automatically cut off the power supply when overloaded to protect the motor and equipment from damage. The electrical protection system includes leakage protection and short circuit protection to ensure the electrical safety of the equipment. The mechanical protection device includes a protective cover installed on the outside of the device to prevent operators from contacting dangerous parts.

2. The overhead line electric tensioner according to claim 1, characterized in that: The speed reducer is implemented using a planetary speed reducer.

3. The overhead line electric tensioner according to claim 1, characterized in that: The transmission mechanism is implemented using belts and pulley assemblies or gear and chain assemblies.

4. The overhead line electric tensioner according to claim 1, characterized in that: The tensile sensor is a resistance strain gauge type sensor.

5. An electric tensioner for overhead lines according to claim 1, characterized in that: The main control unit uses a microprocessor or programmable logic controller to receive input signals, process data, and issue control commands.

6. The overhead line electric tensioner according to claim 1, characterized in that: The motor control unit includes a data acquisition module, a data processing module, and a motor control module. The data acquisition module is connected to the drive motor and the tension sensor respectively, and is used to collect the driving motor operation data and the tension sensor monitoring data. The data processing module analyzes and processes the data, and the motor control module controls the driving motor operation status through the data analysis and processing structure.

7. An electric tensioner for overhead lines according to claim 1, characterized in that: The motor control unit uses a PID control algorithm to adjust the output power of the drive motor based on feedback from the tension sensor.

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