Rocker arm floor derrick power control system for power transmission line tower assembly

Abstract

The utility model belongs to a control system, and provides a rocker arm floor derrick power control system for a power transmission line tower assembly, which aims at solving the problems that a traditional rocker arm floor derrick power system is inconvenient to operate, lacks intelligent monitoring and cannot distinguish a dangerous source, and comprises a comparison adjustment unit and a sensing unit, the power assembly is connected with the comparison adjusting unit and is electrically driven, and the power assembly comprises power units which are used for driving a hoist to rise, a rocker arm to change the amplitude, a derrick to lift, the rocker arm to rotate and a tail rope to be wound and unwound. A plurality of power units corresponding to all parts are provided, centralized control over all the power units is achieved through a comparison adjusting unit, and electric integration of all the power units of the rocker arm landing derrick is achieved. The sensing unit performs sensor monitoring on operation parameters of the rocker arm and the derrick, a risk point can be judged and an alarm can be given through the comparison and adjustment unit, and dangerous working conditions are prevented.

Description

Technical Field

[0001] The present application relates to a control system, and more particularly to a power control system for a rocker arm landing bracket used in a transmission line tower assembly. Background Art

[0002] The rocker arm grounding pole is the main construction equipment for the assembly of transmission line towers. In the tower assembly construction, the power system mostly uses 4 motorized capstans as the main power source, 2 motorized capstans are used for tower material lifting, and 2 motorized capstans are used for rocker arm amplitude change. The rocker arm is rotated by manually pulling the cable wind rope, and the standard section of the pole is lifted by hydraulic jacking. Since the 4 motorized capstans are all independent power equipment and most of the power is traditional fuel power, there are many operators for the motorized capstans during on-site operations, and the tail rope of the capstan still needs to be dragged by manpower. The rocker arm rotation and the pole lifting to increase the standard section are all independent operations, and centralized control cannot be achieved between the power equipment. As a result, when the traditional rocker arm grounding pole is in operation, there are many power system operators, no intelligent monitoring sensor feedback, and it is impossible to achieve intelligent centralized control and hazard source identification, and it is impossible to perceive on-site operation parameters. Summary of the invention

[0003] The present application aims to solve the technical problems that the power system of the traditional rocker arm grounding pole clamp is inconvenient to operate, lacks intelligent monitoring, and cannot identify the source of danger, and provides a power control system for the rocker arm grounding pole clamp for the transmission line tower assembly.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] The present application proposes a power control system for a rocker arm landing holding rod for a transmission line tower assembly, comprising a comparison adjustment unit and a sensor unit, and power components respectively connected to the comparison adjustment units and driven by electricity, wherein the power components comprise a hoisting power unit, a rocker arm luffing power unit, a holding rod lifting power unit, a rocker arm rotation power unit and a tail rope retracting power unit;

[0006] The sensor unit is used to monitor the operating parameters of the rocker arm and the boom, and send the operating parameters of the rocker arm and the boom to the comparison and adjustment unit;

[0007] The hoisting power unit is used to provide power for the tower material lifting of the rocker arms on both sides;

[0008] The rocker arm amplitude change power unit is used to provide power for the amplitude change of the rocker arms on both sides;

[0009] The boom lifting power unit is used to provide power for lifting the standard section of the boom;

[0010] The rocker arm rotation power unit is used to provide power for the rocker arm rotation;

[0011] The tail rope retraction and extension power unit is used to provide power for the retraction and extension of the tail ropes on both sides of the holding pole;

[0012] The comparison and adjustment unit is used to receive the operating parameters of the rocker arm and the holding rod, control the operation of the power component according to the operating requirements and operating parameters, compare the operating parameters with the corresponding set parameters, and adjust the working state of the power component according to the comparison results.

[0013] Furthermore, the electric drive of the hoisting power unit adopts an electric capstan;

[0014] The electric drive of the rocker arm variable amplitude power unit adopts a driving mode of a combination of an AC variable frequency motor and a reducer, and the reducer drives the double drums to rotate and retract the rocker arm;

[0015] The electric drive of the boom lifting power unit adopts a driving mode of a combination of an AC variable frequency motor and a reducer, and the reducer drives the double drums to rotate and lift the standard section of the boom;

[0016] The electric drive of the rocker arm rotation power unit adopts a combination of a three-phase asynchronous motor and a reducer;

[0017] The electric drive of the tail rope retracting and releasing power unit adopts a servo motor constant torque control mode.

[0018] Furthermore, the electric drives of the load-lifting power unit, the rocker arm luffing power unit, the boom lifting power unit and the tail rope retracting power unit are all equipped with brakes.

[0019] Furthermore, the operating parameters of the rocker arm and the pole include lifting weight, pole body inclination, rocker arm inclination, inner cable tension, inner cable inclination, operating wind speed and free section height.

[0020] Further, the sensing unit includes two weighing sensors, a shaft inclination sensor, two rocker arm inclination sensors, a tension sensor, a tension-inclination integrated sensor, an anemometer and a spacing sensor;

[0021] The two weighing sensors are installed in series at the ends of the two hooks to monitor the lifting weight;

[0022] The shaft inclination sensor is arranged on the shaft above the swivel joint and is used to measure the inclination angle around the shaft;

[0023] The two rocker arm inclination sensors are respectively arranged at the connecting roots of the rocker arms on both sides, and are used to monitor the angle of the rocker arm during the luffing process in real time;

[0024] The tension sensor and the tension-tilt integrated sensor are installed in series between the rod body and the inner pull wire and are arranged diagonally to measure the tension and pull wire angle of the inner pull wire;

[0025] The anemometer is arranged at the top of the mast and is used to measure the ambient wind speed;

[0026] The distance sensor is arranged at the top of the mast and is used to measure the distance between the top of the mast and the first waist ring.

[0027] Furthermore, the comparison adjustment unit is integrated into a control cabinet;

[0028] The control cabinet is provided with a power supply unit and is integrated with a phase failure protection device, an overvoltage and undervoltage protection device, a short circuit and overload protection device, a frequency converter fault protection device and an overheating protection device of the power supply.

[0029] Furthermore, it also includes an alarm module,

[0030] The alarm module is used to judge the comparison result, and if it exceeds the set parameters, an alarm prompt is issued; at the same time, the comparison adjustment unit stores the alarm information.

[0031] Furthermore, the alarm module includes a plurality of alarm indicator lights, which respectively correspond to different comparison results.

[0032] Furthermore, the comparison and adjustment unit is equipped with a power unit centralized control cabinet, and the power unit centralized control cabinet adopts a piano-style cabinet.

[0033] Furthermore, the power unit control cabinet is provided with a plurality of power device multi-core aviation plugs, which respectively correspond to the heavy lifting power unit, the rocker arm amplitude change power unit, the boom lifting power unit, the rocker arm rotation power unit and the tail rope retraction power unit, and are used to supply power to the corresponding power units and realize corresponding control.

[0034] Compared with the prior art, this application has the following beneficial effects:

[0035] The present application proposes a power control system for a rocker arm for tower assembly of power transmission lines, including a comparison adjustment unit and a sensor unit, and power components respectively connected to the comparison adjustment unit and electrically driven, wherein the power components include power units respectively used to drive the lifting of the hoist, the amplitude change of the rocker arm, the lifting of the arm, the rotation of the rocker arm and the retraction and release of the tail rope, and the power system is electrified and the power of the rocker arm for tower assembly is analyzed, and a plurality of power units corresponding to each component are proposed, and the centralized control of each power unit is realized through the comparison adjustment unit, so as to realize the electrification integration of all power units of the rocker arm for tower assembly. At the same time, the sensor unit monitors the operating parameters of the rocker arm and the arm, and the comparison adjustment unit can also monitor the difference between the current rocker arm and the arm operating parameters and the corresponding set parameters based on the sensor unit, perform logic verification, determine the risk point and alarm, and prevent the occurrence of dangerous working conditions. In addition, the power control system for the rocker arm for tower assembly of power transmission lines of the present application can set its own parameters and record on-site operation data. It effectively improves the intelligence, digitization, centralized control and working environment perception of the traditional rocker arm power system. It realizes the power system for tower assembly construction of power transmission lines, transforming from the traditional fuel split power to an electric centralized control power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A connection diagram of a power control system for a rocker arm landing arm for tower assembly of a transmission line in this application;

[0038] Figure 2 A schematic diagram of the layout of a power control system for a rocker arm landing pole for tower assembly of a transmission line in this application;

[0039] Figure 3 A schematic diagram of a control method for a power control system of a rocker arm landing bracket for a transmission line tower assembly proposed in this application.

[0040] Figure 2 In the middle: 1- suspended tower material, 2- lifting wire rope, 3- holding rod, 4- rocker arm rotation power unit, 5- lifting power unit, 6- tail rope retracting and releasing power unit, 7- rocker arm luffing power unit, 8- holding rod lifting power unit, 9- comparison adjustment unit; 10- tail rope retracting and releasing power unit control box. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] Tower assembly construction refers to the process of building and installing communication or power towers, which involves assembling the various components of the tower according to the design requirements and installing and fixing them on site. Towers are usually used to support communication antennas, transmission lines or other equipment, so their stability and safety are crucial. In tower assembly construction, a rocker arm floor bracket is required. The rocker arm floor bracket is a special lifting machinery used to lift and assemble towers and other equipment.

[0048] The rocker arm grounding boom usually consists of a boom, a rocker arm, a power system and an operation control system. Among them, the main function of the boom is to serve as a supporting structure for lifting, working in conjunction with the rocker arm to achieve the lifting and positioning of objects. In the tower assembly construction, the stability and load-bearing capacity of the boom are directly related to the safety and efficiency of the construction. The boom is mainly composed of standard sections of the boom, and adopts a modular design for easy transportation, installation and disassembly. The rocker arm is generally composed of a rod, an arm and a connection point. The arm is fixed at one end of the rod and can rotate around the rod. The rocker arm mainly plays the role of transmitting power, bearing pressure or moving the mechanism. In the grounding boom, the rocker arm controls and adjusts the position and direction of the boom by rotating to achieve operations such as grabbing, placing, and transporting objects. At the same time, the rocker arm can also move in a variable amplitude.

[0049] When the rocker arm is in operation, it can achieve precise lifting and positioning through the operation control system. The operator can adjust the angle and height of the rocker arm, as well as the lifting and rotation of the arm according to the needs to complete various lifting tasks.

[0050] In order to improve the intelligence, centralized control and digitalization of the rocker arm landing arm power system and reduce the number of on-site operators, an electric centralized control power system for the rocker arm landing arm is proposed to realize centralized control of the rocker arm landing arm power system. The present application proposes a power control system for a rocker arm landing arm for a transmission line tower assembly, which is further described in detail below in conjunction with the embodiments and drawings.

[0051] like Figure 1 As shown, it is a connection diagram of the power control system of the rocker arm grounding bracket for the transmission line tower assembly of the present application, which may include a comparison adjustment unit and a sensor unit, and power components respectively connected to the comparison adjustment units and driven by electricity, and the power components include a hoisting power unit, a rocker arm amplitude change power unit, a bracket lifting power unit, a rocker arm rotation power unit and a tail rope retraction power unit.

[0052] The sensor unit is used to monitor the operating parameters of the rocker arm and the boom, and send the operating parameters of the rocker arm and the boom to the comparison and adjustment unit.

[0053] In practical applications, the operating parameters of the rocker arm and the boom monitored by the sensor unit can be determined according to the control requirements. Generally, the operating parameters of the rocker arm may include the rocker arm amplitude, rocker arm rotation angle, rocker arm speed, etc. The operating parameters of the boom may include the standard section lifting height of the boom, etc.

[0054] The hoisting power unit is used to provide power for the tower material lifting of the rocker arms on both sides;

[0055] Rocker arm luffing power unit, used to provide power for the luffing of the rocker arms on both sides;

[0056] The boom lifting power unit is used to provide power for lifting the standard section of the boom;

[0057] A rocker arm rotation power unit, used to provide power for the rocker arm rotation;

[0058] Tail rope retraction and release power unit, used to provide power for the retraction and release of the tail ropes on both sides of the pole;

[0059] Each of the above power units provides power to the corresponding components. In actual applications, the specific form of power provided can be determined according to the characteristics of each driven component. In addition, for the power units corresponding to the rocker arm luffing, hoisting and tail rope retraction, whether to set one or two on both sides of the boom can also be determined according to actual use needs.

[0060] The comparison and adjustment unit is used to receive the operating parameters of the rocker arm and the boom, control the operation of the power component according to the operating requirements and operating parameters, compare the operating parameters with the corresponding set parameters, and adjust the working state of the power component according to the comparison results.

[0061] In actual applications, the comparison and adjustment unit can not only monitor the operating parameters of the rocker arm and the boom, but also monitor the operating conditions of the rocker arm and the boom according to the corresponding set parameters, confirm whether the rocker arm and the boom are in a safe working state, and adjust the operating conditions of the rocker arm and the boom at any time.

[0062] It should be noted that the comparison and adjustment unit only receives data, makes the power assembly work according to the received data setting, and performs a simple threshold comparison. After the threshold comparison, when it is greater than or less than the threshold, the power output of the power unit is adjusted accordingly. This can be achieved by the combination of existing power units and related control hardware.

[0063] like Figure 2As shown, it is a layout schematic diagram of the power control system of the rocker arm grounding arm for the power transmission line tower assembly of the present application. The arm 3 is composed of a plurality of stacked standard arm sections, and the ends of the rockers on both sides of the arm 3 respectively lift the tower material 1 to be hoisted by means of the lifting wire rope 2. The power assembly includes a rocker arm rotation power unit 4, two lifting power units 5, two tail rope retracting power units 6, two rocker arm amplitude change power units 7, and a arm lifting power unit 8, a total of eight power units, all of which are electrically driven. The two tail rope retracting power units 6 are also equipped with a tail rope retracting power unit control box 10, and a tail rope retracting power unit control box 10 realizes the control of the two tail rope retracting power units 6. The comparison adjustment unit 9 is equipped with a comparison adjustment unit centralized control cabinet. The rocker arm rotation power unit 4 is composed of an electric rotation device through a slewing support and a motor built into the lower support. Compared with the traditional rocker arm grounding arm manual pulling cable wind rope form, an electric rotation method is adopted to replace manual pulling, and the motor adopts a three-phase asynchronous motor. The hoisting power unit 5 is used for hoisting tower materials during the tower assembly process. When the tower material 1 is hoisted, the rope length change rate of the hoisting wire rope 2 is relatively large. The hoisting power unit 5 adopts an electric capstan. The AC variable frequency motor drives the reducer to reduce speed and increase torque. The reducer drives the double drum to rotate forward and reverse to realize the retraction and release of the hoisting wire rope 2, thereby realizing the lifting and lowering of the tower material 1 under the hook. The tail rope retraction power unit 6 is used for retracting and releasing the tail rope of the hoisting wire rope 2 during the working process of the hoisting power unit 5. Compared with the conventional fuel mechanical capstan that uses manual dragging of the tail rope, the tail rope retraction power unit 6 adopts a servo motor constant torque control to maintain the tail rope tension of 50kg. The servo motor adjusts the direction of the winding component according to the set torque value, and has a rope arrangement function to realize the retraction and release of the tail rope of the wire rope. The boom-changing power unit 7 is designed with an electric winch type based on the fact that the length of the lifting wire rope 2 changes little during the boom-changing process. The AC variable frequency motor drives the drum to rotate after the speed reducer is decelerated and torque increased, thereby realizing the retraction and extension of the variable-length wire rope. The retraction and extension of the variable-length wire rope realizes the retraction and extension of the boom. The boom-lifting power unit 8 is used as a power unit for increasing the standard section of the boom-lifting. After the variable frequency motor is decelerated and torque increased by the speed reducer, the output shaft of the speed reducer drives the double drums to rotate synchronously. The lifting platform is raised and lowered by the lifting wire rope 2 to realize the lifting and lowering of the boom body. Compared with the traditional hydraulic jacking, the synchronous lifting of the boom by the double drums improves the construction efficiency. The above eight power units are all designed in an electrified form for the integrated control of the subsequent power system, and the full electrification of the boom-landing boom power system is realized. Except for the three-phase asynchronous motor without brakes used in the rocker arm rotation power unit 4, the motors corresponding to the other power units can be equipped with brakes to realize power-off braking.

[0064] The sensing unit can monitor the lifting weight, the inclination of the pole and rocker arm, the tension and inclination of the inner cable, the operating wind speed, the height of the free section and other state quantities during the tower assembly process through multiple sensor modules, and transmit each monitored state quantity to the comparison and adjustment unit through wireless data transmission. The comparison and adjustment unit can perform display and logic processing, and realize feedback control of each power unit through the control program inside the comparison and adjustment unit in combination with the current operating parameter monitoring. In actual applications, the monitoring of each operating parameter can be achieved through the following methods:

[0065] The lifting weight monitoring is completed by two weighing sensors, which are used to measure the weight of the tower material being hoisted in real time. They are connected in series between the hook and the tower material being hoisted, and the data is sent through the wireless data transmission module. For the monitoring of the pole body inclination and the rocker arm inclination, the pole body inclination sensor is placed on the pole body above the slewing joint, and the inclination of the pole body in four directions, front and back, left and right, can be measured. The rocker arm inclination sensor is placed at the root of the left and right rocker arms, which is used to monitor the angle in real time during the rocker arm amplitude change process. For the internal tension wire monitoring, it is used to measure the tension and angle of the tension wire of the inner tension wire of the holding rod. The tension sensor and the tension-tilt integrated sensor are installed diagonally, and the two sensors are connected in series between the pole body and the inner tension wire. For the operation wind speed monitoring, it consists of an anemometer and a wind speed measurement data transmission module. The anemometer is placed at the top of the mast and is used to measure the ambient wind speed during the tower assembly construction. For the free section height monitoring, the sensor is installed at the top of the mast, and the free section height measurement is achieved by measuring the distance between the top of the mast and the first waist ring. The sensor unit of the present application can monitor all operating parameters during the process of the rocker arm landing and tower assembly, and send the monitoring status value to the comparison and adjustment unit through wireless transmission to realize feedback control of each power unit.

[0066] In actual applications, the power unit centralized control cabinet is configured with the comparison adjustment unit. As the core of control, its main function is to centrally control each power unit. It can display and record the monitoring parameters of each sensor received by the sensor unit, set the main working parameters of the rocker arm landing arm, and use the rated working parameter setting value as the target value. The monitoring parameters of the safety status monitoring system are the current values. By comparing the internal control logic of the adjustment unit, the dangerous working state of the operation is identified and alarmed, and feedback is given to each power unit, and then the speed reduction or braking is performed accordingly. The power unit centralized control cabinet can adopt a piano-style cabinet, set a horizontal panel as the main operation panel, and the vertical panel integrates the main operating parameter display interface, power indicator light, dangerous working condition alarm indicator light and buzzer, etc. The main power supply can use AC380, which is located on the side of the control cabinet. Multi-core aviation plugs of power devices can be set on both sides of the power unit centralized control cabinet, and each power unit only needs one bus to be inserted to realize power supply and control. In addition, in order to avoid abnormal movement caused by wrong insertion of each power unit, the number of pins of the corresponding aviation plug of each power unit can be different, that is, one-to-one insertion.

[0067] Based on the above transmission line tower assembly rocker arm landing pole power control system, Figure 3 As shown, it is a schematic diagram of a control method of a power control system of a rocker arm landing arm for a transmission line tower assembly proposed in this application, which may include:

[0068] S101, monitoring the operating parameters of the rocker arm and the boom through the sensor unit, and sending the operating parameters of the rocker arm and the boom to the comparison and adjustment unit.

[0069] S102, providing power for lifting tower materials of rocker arms on both sides through the hoisting power unit; providing power for luffing of rocker arms on both sides through the rocker arm luffing power unit; providing power for lifting the standard section of the rocker arm through the boom lifting power unit; providing power for rocker arm rotation through the rocker arm rotation power unit; providing power for retracting and releasing the tail ropes on both sides of the boom through the tail rope retracting and releasing power unit.

[0070] S103, the comparison and adjustment unit receives the operating parameters of the rocker arm and the holding rod, controls the operation of the power component according to the operating requirements and operating parameters, compares the operating parameters with the corresponding set parameters, and adjusts the working state of the power component according to the comparison results.

[0071] For the rocker arm landing arm power system, the arm lifting power unit has a constant lifting and lowering speed and there is no speed change problem, so the speed of the arm lifting power unit is not controlled. As for the weight lifting power unit, due to the change in lifting weight, it lifts at a low speed when the load is large, and at a high speed when the load is small, considering the operating efficiency. Therefore, the lifting speed of the weight lifting power unit can be controlled according to the percentage of the load weight and the rated lifting weight. In addition, the rocker arm variable amplitude power unit can set the speed by comprehensively considering the weight under the hook during the amplitude change, as well as the upper and lower limits of the rocker arm variable amplitude angle. The output speed of the rocker arm rotation power unit is a fixed speed, and there is no speed control strategy.

[0072] As shown in Table 1, it is the control strategy table of the hoisting power unit and the rocker arm luffing power unit.

[0073] Table 1 Control strategy table of the hoisting power unit and the rocker arm luffing power unit

[0074]

[0075]

[0076] When two hoisting power units are used for synchronous lifting, unbalanced torque is easily generated when the tower material is lifted off the ground. During the lifting process of the tower material, the synchronous tensioning of the lifting wire ropes on both sides is the key. Therefore, when the tower material is lifted, it can be controlled through the pre-tensioning stage off the ground and the synchronous lifting stage. Among them, the control strategy of the pre-tensioning stage is shown in Table 2.

[0077] Table 2 Control strategy of hoisting power unit in pre-tensioning stage

[0078] The pre-tension value is set to 20% of the rated lifting capacity. Less than 20% Greater than or equal to 20% Left side lifting power unit Tower lifting Stall Right side lifting power unit Tower lifting Stall

[0079] After the pre-tensioning stage is completed, the stage of synchronous lifting of the suspended tower material is switched to. The unbalanced torque control method is adopted in the synchronous lifting stage. The unbalanced torque control is a protection program set to prevent excessive unbalanced bending moment when the two sides have the same rocker arm amplitude but different lifting weights, or when lifting the same weight, the rocker arm amplitude is different. The upper limit of the torque difference is set to M, and the alarm points are set to 80%M and 100%M. The corresponding actions when reaching the alarm point are shown in Table 3.

[0080] Table 3 Unbalanced torque control strategy

[0081]

[0082] In practical applications, a synchronous-asynchronous switching button can be set on the power unit control cabinet of the power control system of the rocker arm landing arm for the transmission line tower assembly, which is used to switch the synchronous operation and asynchronous operation status of the lifting power unit. When the synchronous-asynchronous switching button is in the single-action state, the lifting, lowering and stopping of the left or right lifting power unit are independently controlled through the single-action button corresponding to the left or right lifting power unit, so as to realize the single-action control of each lifting power unit. The motor operation button interlocking function can be set in the control program. At this time, the synchronous operation button operation is invalid. When the synchronous-asynchronous switching button is in the synchronous state, the single-action button operation of the lifting power unit is invalid, and the synchronous lifting, lowering and stopping of the two lifting power units are realized through the synchronous operation button.

[0083] In addition, in order to realize the above-mentioned "pre-tensioning stage + synchronous lifting stage", and to prevent the suspended tower materials on both sides of the rocker arm from being lifted off the ground asynchronously during the lifting process, causing excessive unbalanced torque to cause the arm to tilt, an off-the-ground pre-tensioning function button is added in the synchronous operation state. In practical applications, first put the button in the synchronous state, put the pre-tensioning of the suspended tower materials in the pre-tensioning stage, and start synchronous lifting. At this time, the two lifting power units are lifted synchronously, and the lifting monitoring sensor monitors the lifting weight changes in real time during the lifting process. The pre-tensioning value is set to 20% of the rated lifting weight. When the sensor tension value under the hook is consistent with the system pre-tensioning setting value, the lifting power unit stops, and the lifting wire rope is pre-tensioned through the pre-tensioning function to prevent the suspended tower materials from being lifted off the ground asynchronously. Then, the synchronous lifting operation button does not need to be reset, and it is directly switched from the pre-tensioning stage to the synchronous lifting stage to achieve synchronous lifting of the suspended tower materials on both sides of the rocker arm. The lifting speed operation button is used to set the lifting speed of the lifting power unit. The lifting speed is controlled based on the actual lifting weight and the percentage of the rated lifting weight. When the lifting weight measured by the sensor under the hook is below 25% of the rated lifting weight, the lifting speed is in low, medium and high gears, which can achieve fast lifting of light loads, low-speed docking of the tower materials being hoisted, and fast descent of the empty hook, thereby improving the work efficiency. When the lifting weight measured by the sensor under the hook is between 25% and 75% of the rated lifting weight, only the low and medium speed gears can be used. The high speed gear program is prohibited from being used and an alarm is issued to prompt the speed reduction. When the lifting weight measured by the sensor under the hook is between 75% and 100% of the rated lifting weight, only the low speed gear can be used. The medium and high speed gear programs are prohibited from being used and an alarm is issued to prompt the speed reduction. In addition, when the lifting weight measured by the sensor under the hook exceeds the rated lifting weight of the boom, the control system determines that it is overloaded. At this time, the overload indicator light is on and the power unit centralized control cabinet buzzes an alarm. The lifting operation buttons of each lifting power unit are invalid and can only be lowered at a low speed.

[0084] In actual application, the horizontal operating table of the power unit control cabinet can be set from left to right as the lifting power unit operation key area, the comparison adjustment unit operation key area, the boom lifting power unit operation key area, the rocker arm rotation power unit operation key area, and the rocker arm variable power unit operation key area. The middle area is the comparison adjustment unit operation key area, the boom lifting power unit operation key area, and the rocker arm rotation power unit operation key area. The control circuit power switch can be in the form of a key, which the operator can carry with him to prevent unlicensed personnel from misoperating. The reset button is used to start the zero position protection of the power unit control cabinet to avoid the corresponding power unit starting due to the operation switches not being in the stop state after the power is supplied, and a protection device is set to produce dangerous actions. After the power unit control cabinet is powered on, all switches are placed in the zero position, and the reset button is pressed, and the program starts to execute (except the speed control button). The boom lifting power unit button is used to control the power of the boom lifting. The frequency conversion motor works at the industrial frequency of 50hz, and the corresponding actions are lifting, lowering and stopping. The rocker arm swing power unit operation buttons are used to control the electric swing device, and the corresponding actions are clockwise rotation, counterclockwise rotation and stop position. The emergency stop operation button is placed at the top level of the entire control system. When an unexpected situation occurs and the operation cannot be responded to, after pressing the emergency stop operation button, all power units will be powered off and braked, and reset after the dangerous working condition is eliminated. The right area is the rocker arm luffing power unit operation button area. The operation buttons are used in a similar way to the hoisting power unit operation buttons. It consists of synchronous luffing and single-action luffing operation switching buttons, luffing synchronous operation buttons, left and right luffing single-action operation buttons, and luffing speed switching buttons.

[0085] In practical applications, the above-mentioned operation buttons of all power units can be set with interlock control in the control program. After a certain operation button control command is issued, if other buttons are operated, the operations of other buttons will be invalid and only the current state will be maintained. After the current operation button is placed in the stop position, all other buttons must be placed in the stop position at the same time to continue subsequent operations. The setting of interlock instructions in the control program can prevent the abnormal movement of the power unit when multiple operation buttons are placed in non-stop positions. That is, for all the operation buttons of the power unit, only the first operated button action command is valid.

[0086] The power unit control cabinet can also display the monitoring data of the sensor unit and the status of each power unit, and set each working parameter. In actual applications, a main display interface can be set on the power unit control cabinet. Through this main display interface, the operator can fully understand the current operating parameters and the working status of the power unit at the work site. At the same time, for faults or dangerous information that occur during the tower assembly process, the main display interface can also set an alarm pop-up window and prompt the next step of operation suggestions. In addition, for key dangerous operating conditions that occur during the tower assembly process, considering that there are many parameters displayed on the main display interface, the operator may not be able to identify the source of operational hazards in time. Alarm indicators and buzzers can be used at the same time to help on-site operators identify dangerous conditions. Different alarm indicators correspond to different dangerous conditions, which is convenient for on-site operators to quickly identify.

[0087] In actual applications, for safety reasons, the power unit centralized control cabinet can collect real-time monitoring parameters and physical operation key work instructions through the wireless data receiving module, compare parameters and write logic control instructions in the PLC, perceive on-site operation parameters, identify and alarm dangerous working conditions, and feedback brake the power unit to prompt the subsequent operation direction. At the same time, the power unit centralized control cabinet can also integrate power supply phase failure protection, over-voltage protection, short-circuit overload protection, inverter fault protection, component overheating protection, etc.

[0088] Compared with the traditional rocker arm floor-standing bracket that uses fuel-powered mechanical winches, each power unit is operated independently, there are many operators on site, and the operating parameters cannot be intelligently sensed during the construction process. Human judgment and identification of dangerous working conditions are required, and then the power unit operators are notified through communication equipment to carry out relevant operations, which is a technical problem of backward technical means. The present application realizes the full electrification of the rocker arm floor-standing bracket power system, perceives the on-site operating parameters and the centralized control operation of the power unit through the comparison and adjustment unit, and realizes the identification of dangerous working conditions through real-time monitoring of on-site operating parameters. The power unit is controlled by programming the internal control logic of the power unit centralized control cabinet to avoid the occurrence of dangerous working conditions and achieve safe and efficient operation during the construction of the transmission line tower assembly.

[0089] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power control system for a rocker arm landing pole for a transmission line tower assembly, characterized in that: It includes a comparison adjustment unit and a sensor unit, and power components respectively connected to the comparison adjustment units and driven by electricity, wherein the power components include a load-lifting power unit, a rocker arm luffing power unit, a boom lifting power unit, a rocker arm rotating power unit, and a tail rope retracting power unit; The sensor unit is used to monitor the operating parameters of the rocker arm and the boom, and send the operating parameters of the rocker arm and the boom to the comparison and adjustment unit; The hoisting power unit is used to provide power for the tower material lifting of the rocker arms on both sides; The rocker arm amplitude change power unit is used to provide power for the amplitude change of the rocker arms on both sides; The boom lifting power unit is used to provide power for lifting the standard section of the boom; The rocker arm rotation power unit is used to provide power for the rocker arm rotation; The tail rope retraction and extension power unit is used to provide power for the retraction and extension of the tail ropes on both sides of the holding pole; The comparison and adjustment unit is used to receive the operating parameters of the rocker arm and the holding rod, control the operation of the power component according to the operating requirements and operating parameters, compare the operating parameters with the corresponding set parameters, and adjust the working state of the power component according to the comparison results.

2. According to claim 1, the power control system for the rocker arm landing arm for the power transmission line tower assembly is characterized by: The electric drive of the lifting power unit adopts an electric capstan; The electric drive of the rocker arm variable amplitude power unit adopts a driving mode of a combination of an AC variable frequency motor and a reducer, and the reducer drives the double drums to rotate and retract the rocker arm; The electric drive of the boom lifting power unit adopts a driving mode of a combination of an AC variable frequency motor and a reducer, and the reducer drives the double drums to rotate and lift the standard section of the boom; The electric drive of the rocker arm rotation power unit adopts a combination of a three-phase asynchronous motor and a reducer; The electric drive of the tail rope retracting and releasing power unit adopts a servo motor constant torque control mode.

3. According to claim 2, the power control system for the rocker arm landing arm for the power transmission line tower assembly is characterized in that: The electric drives of the load-lifting power unit, the rocker arm luffing power unit, the boom lifting power unit and the tail rope retracting power unit are all equipped with brakes.

4. According to claim 3, the power control system for the rocker arm landing arm for the transmission line tower assembly is characterized in that: The operating parameters of the rocker arm and the holding pole include lifting weight, pole body inclination angle, rocker arm inclination angle, inner pull wire tension, inner pull wire inclination angle, operating wind speed and free section height.

5. According to claim 4, the power control system for the rocker arm landing arm for the power transmission line tower assembly is characterized in that: The sensing unit includes two weighing sensors, a shaft inclination sensor, two rocker arm inclination sensors, a tension sensor, a tension-inclination integrated sensor, an anemometer and a spacing sensor; The two weighing sensors are installed in series at the ends of the two hooks to monitor the lifting weight; The shaft inclination sensor is arranged on the shaft above the swivel joint and is used to measure the inclination angle around the shaft; The two rocker arm inclination sensors are respectively arranged at the connecting roots of the rocker arms on both sides, and are used to monitor the angle of the rocker arm during the luffing process in real time; The tension sensor and the tension-tilt integrated sensor are installed in series between the rod body and the inner pull wire and are arranged diagonally to measure the tension and pull wire angle of the inner pull wire; The anemometer is arranged at the top of the mast and is used to measure the ambient wind speed; The distance sensor is arranged at the top of the mast and is used to measure the distance between the top of the mast and the first waist ring.

6. According to claim 5, the power control system for the rocker arm landing arm for the transmission line tower assembly is characterized in that: The comparison adjustment unit is integrated in the control cabinet; The control cabinet is provided with a power supply unit and is integrated with a phase failure protection device, an overvoltage and undervoltage protection device, a short circuit and overload protection device, a frequency converter fault protection device and an overheating protection device of the power supply.

7. According to claim 6, the power control system for the rocker arm landing arm for the transmission line tower assembly is characterized by: Also includes alarm module, The alarm module is used to judge the comparison result, and if it exceeds the set parameters, an alarm prompt is issued; at the same time, the comparison adjustment unit stores the alarm information.

8. According to claim 7, the power control system for the rocker arm landing arm for the power transmission line tower assembly is characterized in that: The alarm module includes a plurality of alarm indicator lights, each corresponding to a different comparison result.

9. The power control system for the rocker arm landing arm for power transmission line tower assembly according to claim 8, characterized in that: The comparison and adjustment unit is equipped with a power unit centralized control cabinet, and the power unit centralized control cabinet adopts a piano-style cabinet.

10. The power control system for the rocker arm landing pole for the power transmission line tower assembly according to claim 9, characterized in that: The power unit control cabinet is provided with a plurality of power device multi-core aviation plugs, which respectively correspond to the heavy lifting power unit, the rocker arm luffing power unit, the boom lifting power unit, the rocker arm rotation power unit and the tail rope retraction power unit, and are used to supply power to the corresponding power units and realize corresponding control.

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