CN203319561U

CN203319561U - Cable crane electric control system based on two-bank control

Info

Publication number: CN203319561U
Application number: CN2013203999437U
Authority: CN
Inventors: 谭哲; 张峥; 龚婷婷
Original assignee: China Railway Wuhan Bridge Industries Ltd
Current assignee: China Railway Wuhan Bridge Industries Ltd
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2013-12-04
Anticipated expiration: 2023-07-05

Abstract

The utility model discloses a cable crane electric control system based on two-bank control. The cable crane electric control system based on two-bank control comprises a first lifting winch frequency converter, a third lifting winch frequency converter, a first traction winch frequency converter, a third traction winch frequency converter, a second lifting winch frequency converter, a fourth lifting winch frequency converter, a second traction winch frequency converter, a fourth traction winch frequency converter, a CPU, a first programmable logic controller and a second programmable logic controller, wherein the first lifting winch frequency converter, the third lifting winch frequency converter, the first traction winch frequency converter and the third traction winch frequency converter are arranged on the south bank, the second lifting winch frequency converter, the fourth lifting winch frequency converter, the second traction winch frequency converter and the fourth traction winch frequency converter are arranged on the north bank, the CPU is arranged in an electrical chamber on the south bank, the first programmable logic controller is arranged in an electrical chamber on the north bank, and the second programmable logic controller is arranged in a driver chamber of a cable crane. The cable crane electric control system based on two-bank control overcomes the defects that a traditional control system has many faults, and is unstable in performance, poor in operability and poor in safety in the environment that equipment is started frequently.

Description

The cable crane electric control system of controlling based on two sides

Technical field

The utility model relates to cable crane control system technical field, refers to particularly a kind of cable crane electric control system of controlling based on two sides.

Background technology

Existing cable crane electric control system all adopts the multicircuit mechanical type switching controls structure based on relay, stability and the reliability of this control structure are poor, and the life-span is also shorter, simultaneously, it is respectively a system that conventional cable loop wheel machine electric control system is equivalent to two sides, need the artificial device synchronization of doing, operability is poor, and affects safety.That for scale, the less above-mentioned shortcoming of cable crane electric system embodies and not obvious, but, for large-scale cable crane electric system, (this cable crane electric system need be used 8 winchs to the cable crane electric system that the cross a river bridge used as built, be respectively 4 hoist winch and 4 rack winches, be placed in respectively the two sides, north and south), because the cross a river Bridge Construction is long in time limit, control accuracy requires high, the poor stability of the existing multicircuit mechanical type switching controls structure based on relay, life-span is short, reliability hangs down the construction that will have a strong impact on on-the-spot bridge with the low shortcoming of control accuracy.

The utility model content

The purpose of this utility model is exactly that a kind of cable crane electric control system of controlling based on two sides will be provided, and this control system can be controlled accurately to many cable cranes, and the stability of control system self is high simultaneously, long service life.

For realizing this purpose, the cable crane electric control system of controlling based on two sides that the utility model is designed, it is characterized in that, it comprises and is arranged on first of the southern bank winch frequency converter that hoists, the 3rd winch frequency converter that hoists, the first rack winch frequency converter and the 3rd rack winch frequency converter, be arranged on second of the northern bank winch frequency converter that hoists, fourth rises the winch frequency converter, the second rack winch frequency converter and the 4th rack winch frequency converter, be arranged on the CPU(Central Processing Unit in southern bank electrical house, central process unit), be arranged on the first programmable logic controller (PLC) in northern bank electrical house, be arranged on the second programmable logic controller (PLC) in the cable crane driver's cab, wherein, the communication ends of described the second programmable logic controller (PLC) connects respectively the communication ends of CPU and the communication ends of the first programmable logic controller (PLC), the signal output part of described CPU respectively with the first winch frequency converter that hoists, the 3rd winch frequency converter that hoists, the first rack winch frequency converter is connected with the signal input part of the 3rd rack winch frequency converter, the signal output part of the first programmable logic controller (PLC) respectively with the second winch frequency converter that hoists, fourth rises the winch frequency converter, the second rack winch frequency converter is connected with the signal input part of the 4th rack winch frequency converter.

The beneficial effects of the utility model are:

1, by digital, intelligentized design, realize stable low cruise, improved the accuracy of location;

2, adopt varying frequency starting and braking, reduced physical shock, extended the life-span of transmission device, and further strengthened the steady of operation;

3,, owing to having adopted above-mentioned Design of digital, make malfunction monitoring and the protection automatically of the utility model energy reality;

4, 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 cable crane.

The utility model has made up that traditional control system fault under the working environment of equipment frequent starting is many, the shortcoming of unstable properties well.Programmable logic controller (PLC) is with the hardware fault self detecting function; while breaking down, can send a warning in time; make the circuit except programmable logic controller (PLC) and equipment in system also obtain the fault self-diagnosis protection, guaranteed that whole system has high reliability.

The accompanying drawing explanation

Fig. 1 is structured flowchart of the present utility model;

Wherein, 1-CPU, the 2-the first programmable logic controller (PLC), the 3-the second programmable logic controller (PLC), 4-the first hoist winch frequency converter, 5-the three hoist winch frequency converter, the 6-the first rack winch frequency converter, the 7-the three rack winch frequency converter, 8-the second hoists, and winch frequency converter, 9-fourth rises winch frequency converter, the 10-the second rack winch frequency converter, the 11-the four rack winch frequency converter.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:

The cable crane electric control system of controlling based on two sides that the utility model is designed, it comprises and is arranged on first of the southern bank winch frequency converter 4 that hoists, the 3rd winch frequency converter 5 that hoists, the first rack winch frequency converter 6 and the 3rd rack winch frequency converter 7, be arranged on second of the northern bank winch frequency converter 8 that hoists, fourth rises winch frequency converter 9, the second rack winch frequency converter 10 and the 4th rack winch frequency converter 11, be arranged on the CPU1 in southern bank electrical house, be arranged on the first programmable logic controller (PLC) 2 in northern bank electrical house, be arranged on the second programmable logic controller (PLC) 3 in the cable crane driver's cab, wherein, the communication ends of the second programmable logic controller (PLC) 3 connects respectively the communication ends of CPU1 and the communication ends of the first programmable logic controller (PLC) 2, the signal output part of CPU1 respectively with the first winch frequency converter 4 that hoists, the 3rd winch frequency converter 5 that hoists, the first rack winch frequency converter 6 is connected with the signal input part of the 3rd rack winch frequency converter 7, the signal output part of the first programmable logic controller (PLC) 2 respectively with the second winch frequency converter 8 that hoists, fourth rises winch frequency converter 9, the second rack winch frequency converter 10 is connected with the signal input part of the 4th rack winch frequency converter 11.

In technique scheme, the communication ends of the second programmable logic controller (PLC) 3 connects the communication ends of CPU1 and the communication ends of the first programmable logic controller (PLC) 2 by the PROFIBUS-DP bus respectively.The signal output part of described CPU1 is connected with the signal input part of the 3rd rack winch frequency converter 7 by PROFIBUS-DP bus and first the hoist winch frequency converter 5, the first rack winch frequency converter 6 of winch frequency converter 4, the 3rd that hoist respectively.The signal output part of described the first programmable logic controller (PLC) 2 respectively by PROFIBUS-DP bus and second hoist winch frequency converter 8, fourth rises winch frequency converter 9, the second rack winch frequency converter 10 is connected with the signal input part of the 4th rack winch frequency converter 11.

In technique scheme, at southern bank, establish CPU1 as main website, driver's cab and northern bank electrical house are respectively established a programmable logic controller (PLC) as substation; The collection of signal and the control of equipment complete by the second programmable logic controller (PLC) 3 substations of driver's cab, CPU in master station and the first programmable logic controller (PLC) 2 couple together by the PROFIBUS-DP bus, realize sequential and the logic control of each mechanism's operation of hoisting crane; The control form that whole control system is CPU main website+two a programmable logic controller (PLC) substation, and adopted Programmable Logic Controller and HMI(Human Machine Interface, man-machine interface) management imformation system of touch-screen.

In technique scheme, the speed of ac variable-frequency electric motor is directly proportional to line frequency, changes uniformly line frequency, the synchronous speed of change electrical motor that can be level and smooth, thus realize that the speed of squirrel cage asynchronous motor controls.

In technique scheme, programmable logic controller (PLC) is used for the instruction of the operations such as the storage actuating logic computing of section within it, sequential operation, timing, counting and arithmetical operation, and can, by digital or analog input and output, control various types of machinery.

Working process of the present utility model is: the second programmable logic controller (PLC) 3 of driver's cab sends the cable crane control command, by the PROFIBUS-DP cable by digital data transmission to CPU1 and the first programmable logic controller (PLC) 2 in southern bank electrical house, the operating orders such as the computing of storage inside actuating logic, sequential operation, timing, counting and arithmetical operation at CPU1 and the first programmable logic controller (PLC) 2, under various different operating mode instructions, carry out corresponding operational order; Realize by functions such as CPU1 and the first programmable logic controller (PLC) 2 self input, output, processing, memory, controls, and convert control signal to and export to each corresponding frequency converter, thereby realize that the integral body of cable crane controls.

The content that this specification sheets is not described in detail belongs to the known prior art of professional and technical personnel in the field.

Claims

1. a cable crane electric control system of controlling based on two sides, it is characterized in that, it comprises and is arranged on first of the southern bank winch frequency converter (4) that hoists, the 3rd winch frequency converter (5) that hoists, the first rack winch frequency converter (6) and the 3rd rack winch frequency converter (7), be arranged on second of the northern bank winch frequency converter (8) that hoists, fourth rises winch frequency converter (9), the second rack winch frequency converter (10) and the 4th rack winch frequency converter (11), be arranged on the CPU(1 in southern bank electrical house), be arranged on the first programmable logic controller (PLC) (2) in northern bank electrical house, be arranged on the second programmable logic controller (PLC) (3) in the cable crane driver's cab, wherein, the communication ends of described the second programmable logic controller (PLC) (3) connects respectively CPU(1) communication ends and the communication ends of the first programmable logic controller (PLC) (2), described CPU(1) signal output part respectively with the first winch frequency converter (4) that hoists, the 3rd winch frequency converter (5) that hoists, the first rack winch frequency converter (6) is connected with the signal input part of the 3rd rack winch frequency converter (7), the signal output part of the first programmable logic controller (PLC) (2) respectively with the second winch frequency converter (8) that hoists, fourth rises winch frequency converter (9), the second rack winch frequency converter (10) is connected with the signal input part of the 4th rack winch frequency converter (11).

2. the cable crane electric control system of controlling based on two sides according to claim 1, it is characterized in that: the communication ends of described the second programmable logic controller (PLC) (3) connects CPU(1 by the PROFIBUS-DP bus respectively) communication ends and the communication ends of the first programmable logic controller (PLC) (2).

3. the cable crane electric control system of controlling based on two sides according to claim 1 and 2 is characterized in that: signal output part described CPU(1) is connected with the signal input part of the 3rd rack winch frequency converter (7) by PROFIBUS-DP bus and first the hoist winch frequency converter (5), the first rack winch frequency converter (6) of winch frequency converter (4), the 3rd that hoist respectively.

4. the cable crane electric control system of controlling based on two sides according to claim 1 and 2 is characterized in that: the signal output part of described the first programmable logic controller (PLC) (2) respectively by PROFIBUS-DP bus and second hoist winch frequency converter (8), fourth rises winch frequency converter (9), the second rack winch frequency converter (10) is connected with the signal input part of the 4th rack winch frequency converter (11).