CN201347327Y

CN201347327Y - Electric control system of cable crane

Info

Publication number: CN201347327Y
Application number: CNU2008202237948U
Authority: CN
Inventors: 郜小群; 唐诚; 蒋光全; 吴玉龙; 林用祥
Original assignee: China Railway Erju Co Ltd; China Railway Erju 5th Engineering Co Ltd
Current assignee: China Railway No 2 Engineering Group Co Ltd
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-11-18
Anticipated expiration: 2018-12-26

Abstract

The utility model discloses an electric control system of cable crane, which comprises three-grade systems of a comprehensive monitor, a PLC control system and an ABB variable-frequency drive system, data exchange of the three grades is realized through PROFIBUSDP bus communication, wherein the comprehensive monitor is used by operating staffs to control devices to send orders and collect signals, an ABS rectification or feedback unit is connected with inverters of each mechanism through a common direct current bar bus, and after the ABB variable-frequency drive system receives an analog signal sent by the PLC, a lifting inverter and a running inverter are used to control the lifting and running of winding engines, thereby achieving the purpose of controlling a cable hoisting carriage to lift and run. The electric control system well satisfies the lifting demands of field construction through realizing synchronous operation of a plurality of winding engines, improves the whole machine performances, reduces the number of operating staffs, and lowers the intensity of operating drivers.

Description

The cable crane electric control system

Technical field

The utility model relates to construction field, about the cable lifting, specifically is a kind of cable crane electric control system especially.

Background technology

Existing traditional relay control system, because its power consumption is many, life-span is short, poor reliability, many winchs can't synchro control etc. shortcoming obvious, and the site operation requirement is more and more higher, construction such as Nanning bridge master bridge, first, bridge CABLEWAY ERECTION SYSTEM main rope span is big, because end bay guarantees that in principle end bay main rope horizontal sextant angle is less than 26 ° and be the controlled target setting in conjunction with topographic condition, determine that thus the main rope span is arranged as: east side 240m (L1)+452m (L0)+280 (L2) m, west side 235m (L1)+452m (L0)+280m (L2), main span L0 is 452m; The second, winch quantity is many: cable crane uses 32 main winch altogether, is respectively 16 hoisting windings and 16 rack winches, and other has 4 work cableway winchs, separately control; The 3rd, the lifting quality is big, and the steel case arch west arch first sections biggest quality reaches 218t.The 4th, the winch start and stop are frequent; The 5th, steel case line of apsides shape adjusting accuracy requires high, and the aerial contraposition of this bridge arch sections is related to vertically, horizontal, short transverse and the adjustment of four direction such as self reverse, so the accuracy requirement height.Therefore existing relay control system can't satisfy the site operation needs, thereby need a kind of can addressing the above problem, and safe and reliable new control system.。

The utility model content

The purpose of this utility model is in order to remedy the deficiency of traditional relay control system in large-tonnage lifting, proposed a kind of safe and reliable, many winch synchro control performances reach well steel case line of apsides shape control accuracy high be the electric central control system of core with PLC.

This cable crane electric control system is made up of comprehensively monitoring, PLC control system and ABB Frequency Drive system three-level system, data exchange between three grades realizes by PROFIBUS DP bus communication, and wherein comprehensively monitoring is that operating personal is used for device control is sent the collection of instruction and signal; The PLC control system in south, north all establishes S7-300 of Siemens Company series CPU as main website, these two CPU in master station are standby each other; The collection of signal and the control of equipment are finished by long-range ET200M slave station, CPU in master station and slave station couple together by PROFIBUS DP bus, between slave station and the slave station be by PROFIBUS DP fibre-optic cable with north on the bank, the downstream controlled object links into an integrated entity, and realizes the sequential and the logic control of each mechanism's operation of hoisting crane; The whole control system is the control forms of the long-range ET200M of the S7-300 of Siemens Company series CPU+ (modular i of arranged in high density/O station), and has adopted the management imformation system of Programmable Logic Controller (PLC) and HMI touch-screen; ABB rectification/feedback unit links to each other with each mechanism's inverter by public direct-flow bus wire, ABB Frequency Drive system receives after the analog signal that PLC sends, the utilization frequency converter that hoists, walks is controlled the winch that hoists and walk, thereby reaches hoisting and walking of control cable crane carriage.

The utility model has satisfied the site operation lifting requirements well by realizing many winch synchronized operations, has improved machine performance, has reduced operating personal quantity, has reduced operation driver intensity.

Description of drawings

The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is that the PLC electric control system is arranged scheme drawing.

The specific embodiment

Disclosed all features in this specification sheets, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.

Disclosed arbitrary feature in this specification sheets (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.

Fig. 1 is a cable crane electric control system scheme drawing, and native system is made up of comprehensively monitoring (touch interface operator's station), PLC control system and ABB Frequency Drive system three-level system as shown in FIG..Data exchange between three grades is realized by PROFIBUS DP bus communication.Comprehensively monitoring (touch interface operator's station) is that operating personal is used for device control is sent the collection of instruction and signal; It is made up of touch interface and corresponding application software thereof, by MPI (multistation communications protocol) thus mouthful obtain running state and the failure message that information needed is monitored car load with the CPU communication of PLC, realize fault self-diagnosis, be easy to the daily attention and the maintenance of hoisting crane; The PLC control system in south, north all establishes S7-300 of Siemens Company series CPU as main website, these two CPU in master station are standby each other; The collection of signal and the control of equipment are finished by long-range ET200M slave station, CPU in master station and slave station couple together by PROFIBUS DP bus, between slave station and the slave station be by PROFIBUS DP fibre-optic cable with north on the bank, the downstream controlled object links into an integrated entity, and realizes the sequential and the logic control of each mechanism's operation of hoisting crane; The whole control system is the control forms of the long-range ET200M of the S7-300 of Siemens Company series CPU+ (modular i of arranged in high density/O station), and has adopted the management imformation system of Programmable Logic Controller (PLC) and HMI touch-screen.The principle of ABB AC variable-frequency speed regulation system: the speed of alternating-current motor/AC motor is directly proportional with line frequency, changes line frequency uniformly, the synchronous speed of change electrical motor that can be level and smooth, thereby the speed control of realization squirrel cage asynchronous motor.ABB rectification/feedback unit links to each other with each mechanism's inverter by public direct-flow bus wire and realizes the accuracy control of each mechanism's driving motor torque and speed.

PLC adopt can program design memory device, being used within it, portion stores the instruction that actuating logic computing, sequential operation, timing, counting and arithmetical operation etc. are operated, and can control various types of machineries or production process by digital or analog input and output.The electric central control system principle of work of this cable crane PLC: comprehensive monitoring system (operator's station) is by sending cable crane carriage control command, convert digital signal to by the ET200M slave station, by PROFIBUS DP fibre-optic cable with digital data transmission to the PLC CPU in master station, operating orders such as the computing of the actuating logic of portion's storage within it, sequential operation, timing, counting and arithmetical operation, under various different operating mode instructions, carry out corresponding operational order; Realize by functions such as CPU self input, output, processing, memory, controls, and convert analog signal output to; ABB Frequency Drive system receives after the analog signal that PLC sends, and utilizes the frequency converter that hoists, walks to control the winch that hoists and walk, thereby reaches hoisting and walking of control cable crane carriage.

The Frequency Drive system that this PLC control system uses has the following advantages: (1) digital, intelligentized design, convenient, flexible speed setting, realize stablize low cruise, and improved the accuracy of locating; (2) soft start and braking have reduced physical shock, prolong the transmission device life-span, operate steadily; (3) electrical motor service direction, the electric control of speed oncontacting have improved the reliability of electric system; (4) malfunction monitoring and protection automatically; (5) utilize the characteristic of the above approximate constant power speed governing of frequency converter fundamental frequency, can realize that load speed hour doubles operation, has improved the work efficiency of hoisting crane.Remedied well that traditional relay fault under the working environment of equipment frequent starting is many, the shortcoming of unstable properties.From the machine external circuit of PLC, use PLC to constitute control system, to compare with the relay contactor system of equal scale, electrical wiring and make and break contact reduced to hundreds if not thousands of /and one, fault also just reduces greatly.In addition, PLC has the hardware fault self detecting function, can in time send a warning when breaking down.The PLC control system only need just can many winchs of synchro control by instruction input, output; and in application software; enroll the fault self-diagnosis program of peripheral components; make that the circuit except that PLC and equipment also obtain the fault self-diagnosis protection in the system, make total system have high reliability.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1, cable crane electric control system, it is characterized in that: native system is made up of comprehensively monitoring, PLC control system and ABB Frequency Drive system three-level system, data exchange between three grades realizes by PROFIBUS DP bus communication, and wherein comprehensively monitoring is that operating personal is used for device control is sent the collection of instruction and signal; The PLC control system in south, north all establishes S7-300 of Siemens Company series CPU as main website, these two CPU in master station are standby each other; The collection of signal and the control of equipment are finished by long-range ET200M slave station, CPU in master station and slave station couple together by PROFIBUS DP bus, between slave station and the slave station be by PROFIBUS DP fibre-optic cable with north on the bank, the downstream controlled object links into an integrated entity, and realizes the sequential and the logic control of each mechanism's operation of hoisting crane; ABB rectification/feedback unit links to each other with each mechanism's inverter by public direct-flow bus wire, ABB Frequency Drive system receives after the analog signal that PLC sends, the utilization frequency converter that hoists, walks is controlled the winch that hoists and walk, thereby reaches hoisting and walking of control cable crane carriage.

2, cable crane electric control system as claimed in claim 1 is characterized in that: thus comprehensively monitoring obtains running state and the failure message that information needed is monitored car load by the CPU communication of MPI mouth and PLC, realizes fault self-diagnosis.