CN213171171U - Electric control system of double-horizontal-arm crane for electric power construction - Google Patents

Abstract

The utility model discloses an electric control system of a double-horizontal-arm crane for electric power construction, which comprises an operating system, a control system and a CC-Link module; the CC-Link module comprises a CC-Link master station module and a plurality of CC-Link slave station modules; the control system comprises a slave PLC and a CC-Link slave station module which form a slave station site, wherein the output end of the slave PLC controls the amplitude variation mechanism and the swing mechanism, and the input end of the slave PLC is connected with the mechanical safety device; the operating system comprises a master PLC and a CC-Link master station module which are connected to form a master station, the slave PLC and the CC-Link slave station module are connected in a CAN bus mode to form a slave station, and the master PLC is provided with a switch for controlling the amplitude variation mechanism and the swing mechanism. And the transmission of the operation instruction is carried out in a CC-Link bus mode, so that the centralized control of the traction machine, the holding pole amplitude variation mechanism and the swing mechanism is realized.

Description

Electric control system of double-horizontal-arm crane for electric power construction

Technical Field

The utility model relates to an electric power construction machinery technical field, concretely relates to electric power construction double flat-arm crane electrical system.

Background

The electric power construction double-horizontal-arm crane (also called electric power holding pole) is a common hoisting device in the electric power construction process, and along with the development of electric network construction in recent years, extra-high voltage and extra-high voltage lines are increased, more and more lines in the Yangtze river and across the sea are increased, and the height of a stringing iron tower is increased. The electric pole generally adopts the form of upward rotation and trolley amplitude variation, and adopts a ground operation mode for the convenience of operation and the reduction of the labor intensity of the operator for holding the pole up and down. In view of the regulations of site topography, construction safety and the like, the linear distance between the ground operation room and the ground center of the holding pole is as far as hundreds of meters, and the longest control cable length can reach nearly one kilometer from the operation room to a control cabinet on the holding pole by adding the height of the winding and the holding pole. If the traditional multi-core control cable is adopted for point-to-point control, alternating current low voltage or direct current voltage is generally adopted as control voltage, and due to the fact that a control line is too long and voltage loss is large, control components such as a relay can not act finally. When the alternating-current low voltage is adopted, except voltage loss, the induced voltage between the multi-core cables is also very large, although the induced voltage can be reduced through the RC loop, the induced voltage cannot be completely eliminated, the malfunction or fault is very easy to cause, and unnecessary troubles are brought to the normal operation of equipment. Secondly, for some large-scale electric power holding poles, a hoisting system usually adopts a tractor to replace a winch, the tractor basically adopts local operation, centralized control is not realized, the number of operators is increased, and the labor cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that a two horizontal jib crane electrical system of electric power construction is provided, through CC-Link bus mode, set up the host site, follow the website to the mode of communication is to the operating instruction between operating system and the control system, and safety signal transmits, in order to avoid adopting the adverse effect that multicore control cable long distance control brought, ensures the normal safe operation of electric power armful of pole. In the long-distance control, an amplifying relay can be added in the CC-Link communication loop to increase the distance of the communication control. The communication with the local control unit of the lifting tractor is realized through a special communication control module, and the centralized control of the tractor is realized.

The utility model provides a technical scheme does: an electric control system of a double-horizontal-arm crane for electric power construction comprises an operating system, a control system and a CC-Link module; the CC-Link module comprises a CC-Link master station module and a plurality of CC-Link slave station modules; the control systems correspond to the holding poles in number, each control system comprises a slave PLC and a CC-Link slave station module, the CC-Link slave station module is connected with the slave PLC to form a slave station, the output end of the slave PLC controls the amplitude variation mechanism and the swing mechanism, and the input end of the slave PLC is connected with the mechanical safety device; the operating system comprises a master PLC and a CC-Link master station module, the CC-Link master station module is connected with the PLC to form a master station, the slave PLC is connected with the CC-Link slave station module in a CAN bus mode to form a slave station, the slave station is connected with the master station through a communication cable, and the master PLC is provided with a switch for controlling the amplitude variation mechanism and the swing mechanism.

Compared with the prior art, the utility model have following advantage:

1. the CC-Link communication mode is adopted between the operating system and the control system for control, so that equipment misoperation caused by the problems of voltage drop and line-to-line induced electricity generated by long-distance control of a control cable is effectively avoided, and the running reliability of the equipment is ensured. The system is convenient to upgrade and expand, a large number of power cables and communication cables can be saved, hardware cost investment is saved, and electricity consumption cost is reduced.

2. Through special communication control module of tractor, realized the centralized control of tractor in the control room, avoided the big circumstances such as instruction that arouses of near tractor body noise to hear, guaranteed the quick response of tractor operating personnel's instruction, also avoided operating personnel to be in noise pollution's environment for a long time.

3. The double-safety protection device adopts two sets of mechanical and electronic safety protection devices, and has double safety, so that the equipment is safer to operate.

4. The wind speed monitoring acquires the ground wind speed and the high-altitude wind speed, can form contrast, and can more practically reflect the wind power condition under the hoisting condition.

5. The double alarm of the digital display screen and the alarm indicator lamp is adopted, so that the operator can be more effectively reminded.

Drawings

FIG. 1 is a schematic structural diagram of an electric control system of a double-flat-arm crane for electric power construction;

fig. 2 is a schematic diagram of an operating system of the double-horizontal-arm crane for electric power construction.

Detailed Description

The invention will be further explained with reference to the drawings and the detailed description,

as shown in FIG. 1, the electric control system for the double-horizontal-arm crane for electric power construction comprises an operating system 10, a control system 20, a safety monitoring system 30 and CC-Link modules. The control system 10 is arranged on a control cabinet on the holding pole, and the operating system 20 is arranged in a ground operating room. The operating system comprises a master PLC and a CC-Link master station module, one control system in the embodiment correspondingly controls one holding pole, and the control system comprises a slave PLC and a CC-Link slave station module. The safety monitoring system comprises a slave PLC and a CC-Link slave station module. And the CC-Link slave station module of the safety monitoring system and the CC-Link slave station module of the control system are in communication connection with the CC-Link master station module of the operating system through a bus.

As shown in fig. 2, the main PLC of the operating system 10 is connected to a peripheral control circuit, which includes a communication type wind speed sensor signal detected by the communication port 1, the communication port 2 is connected to the safety monitoring screen by communication, and the input end is connected to an operating mechanism (winch rotation, variable amplitude operating button, switch) for realizing the variable amplitude rotation function of the holding pole and aiming at the winch. The operating mechanism is a piano operating table top and is divided into a vertical panel and an inclined panel, and the vertical panel is mainly provided with a mounting hole

The device comprises a rod wrapping state monitoring screen, an alarm indicator lamp and an inclined plane plate, wherein an operating mechanism is mainly installed on the inclined plane plate, and the operating mechanism comprises a swing mechanism operating button, a switch, a luffing mechanism operating button, a switch, a tractor operating button and a switch.

In addition, the main PLC is used for controlling the ground tractor, and the operated tractor in the embodiment comprises two tractors 1 and 2. The main PLC controls the tractor by connecting the traction mechanism assemblies, the number of the traction mechanism assemblies corresponds to that of traction motors, each traction mechanism assembly comprises a special communication control module for the tractor, a tractor operating button and a tractor monitoring screen, the special communication control module for the tractor is connected with the main PLC in an expansion mode, and the special communication control module for the tractor is connected with the tractor monitoring screen and the tractor operating button. In the embodiment, the output end of the main PLC is connected with the special communication control module 1 and 2 for the tractor

The alarm indicator is used for outputting alarm indication and safety protection control on the tractor, the special communication control module 1 for the tractor is connected with the tractor 1, the tractor monitoring screen 1 and the tractor operating button 1, the special communication control module 2 for the tractor is connected with the tractor 2, the tractor monitoring screen 2 and the tractor operating button 2, remote control on the tractor can be achieved, meanwhile, the special communication control module is connected with the running state monitoring screen of the tractor, and real-time display and monitoring on running data of the tractor are achieved. The special communication control module 1 for the tractor and the special communication control module 2 for the tractor adopt RS-232c or RS-422 communication adapters.

In the embodiment, only one controlled holding rod is arranged, so that the control system is correspondingly provided, the control system comprises a CC-Link slave station 1 station module, a slave PLC1 and a frequency converter, the slave PLC1 is connected with the CC-Link slave station 1 station module in a CAN bus mode to form a slave station 1 station, the slave station 1 station is connected with a master station through a communication mode, the master station CAN send an action command to the slave station through the CC-Link master station module and CAN also obtain slave station data, the output end of the PLC1 is connected with the input control end of the frequency converter through a wire, the output control end of the frequency converter is connected with the input end of the slave PLC1 through a wire, signals such as output torque, output frequency and fault of the frequency converter are fed back to the slave PLC1 to realize feedback control and better guarantee the safe operation of the mechanism, the slave PLC1 controls the connection of a contactor coil to control the action of the brake and the fan of the mechanism, and the input end of the PLC, the device comprises a mechanical moment difference limiter, a weight limiter and a limiter, the acquisition of action signals of the safety device is realized, and the slave PLC1 output end is connected with a luffing mechanism, a slewing mechanism and a mechanical safety device.

The system also comprises a safety monitoring system which comprises a CC-Link slave station 2 station module and a slave PLC2, wherein the slave PLC2 is connected with the CC-Link slave station module 2 in a CAN bus mode to form a slave station 2 station, an AD module is connected with the slave PLC2 in the CAN bus mode, the AD module is connected with a weight sensor and an amplitude sensor, and the input end of the slave PLC2 is connected with a pulse type wind speed sensor for obtaining real-time wind speed.

A control method for the dual-horizontal-arm crane used in electric power construction includes

S1: starting up, carrying out self-checking and communication between the master station and the slave station for checking, if no abnormity exists, enabling the system to enter a standby state, and scanning an operation button and a switch signal in real time; if the system is abnormal, the system enters a locking state, and the executing mechanism cannot act;

s2: the operating mechanism is operated, the master station sends an operating instruction to the slave station according to a signal of the operating mechanism, the system can scan the condition of the safety protection device in real time, and if the safety protection device acts, the system executes a safety protection action program to control the related mechanism to run towards a safety direction;

s3: and the slave station receives the instruction, controls the corresponding execution mechanism to work and feeds back the state parameters of each execution mechanism to the master station.

Claims (8)

1. An electric control system of a double-horizontal-arm crane for electric power construction is characterized by comprising an operating system, a control system and a CC-Link module;

the CC-Link module comprises a CC-Link master station module and a plurality of CC-Link slave station modules;

the control systems correspond to the holding poles in number, each control system comprises a slave PLC and a CC-Link slave station module, the CC-Link slave station module is connected with the slave PLC to form a slave station, the output end of the slave PLC controls the amplitude variation mechanism and the swing mechanism, and the input end of the slave PLC is connected with the mechanical safety device;

the operating system comprises a master PLC and a CC-Link master station module, the CC-Link master station module is connected with the PLC to form a master station, the slave PLC is connected with the CC-Link slave station module in a CAN bus mode to form a slave station, the slave station is connected with the master station through a communication cable, and the master PLC is provided with a switch for controlling the amplitude variation mechanism and the swing mechanism.

2. The electric control system of the electric power construction double-horizontal-arm crane as claimed in claim 1, wherein the control system is arranged on a control cabinet on the holding pole, and the operating system is arranged in a ground operating room.

3. The electric control system of the electric power construction double-horizontal-arm crane as claimed in claim 1, wherein an amplifying relay is arranged in a communication connection loop of the CC-Link master station module and the CC-Link slave station modules.

4. The electric control system of the double-horizontal-arm crane for electric power construction as claimed in claim 1, wherein the input end of the main PLC is further provided with a communication type wind speed sensor signal for ground detection, an output control tractor, a communication connection safety monitoring screen and an alarm indicator lamp.

5. The electric control system of the electric construction double-horizontal-arm crane as claimed in claim 1, wherein the main PLC controls the traction machine through a plurality of traction mechanism assemblies, the number of the traction mechanism assemblies corresponds to that of the traction motors, the traction mechanism assemblies comprise a traction machine special communication control module, a traction machine operation button and a traction machine monitoring screen, the traction machine special communication control module is in extended connection with the main PLC, and the traction machine special communication control module is connected with the traction machine monitoring screen, the traction machine operation button and the traction machine.

6. The electric control system of the double-horizontal-arm crane for electric power construction as claimed in claim 1, wherein the control system further comprises a frequency converter, the output end of the PLC is connected with the input control end of the frequency converter through an electric wire, the output control end of the frequency converter is connected with the input end of the PLC through an electric wire, the output torque, the output frequency and the fault signal of the frequency converter are fed back to the PLC, and the PLC is connected with the control contactor coil to control the mechanism brake and the fan.

7. The electric control system of the electric power construction double-horizontal-arm crane as claimed in claim 1, wherein the mechanical safety device comprises a mechanical moment difference limiter, a weight limiter and a limiter.

8. The electric control system of the electric power construction double-horizontal-arm crane as claimed in claim 7, further comprising a safety monitoring system, wherein the safety monitoring system comprises a slave PLC and a CC-Link slave station module, the CC-Link slave station module is in communication connection with the CC-Link master station module, the slave PLC is further in input connection with a weight sensor, an amplitude sensor and a pulse wind speed sensor for high altitude aiming at safe operation of a luffing mechanism and a slewing mechanism, and the slave PLC transmits detection signals back to the CC-Link master station and the master PLC.

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