CN1061384A

CN1061384A - Program controlled electric device for hoisting machinery in loading container

Info

Publication number: CN1061384A
Application number: CN 90105587
Authority: CN
Inventors: 李森林; 谭桂莲; 李科如; 刘佩高
Original assignee: ELECTRIC CONTROL EQUIPMENT PLANT XIANTAN CITY
Current assignee: ELECTRIC CONTROL EQUIPMENT PLANT XIANTAN CITY
Priority date: 1990-11-06
Filing date: 1990-11-06
Publication date: 1992-05-27

Abstract

The present invention relates to the electrical control gear of elevator machinery.Particularly in its electric control loop, adopt programmable controller to simplify the electric wiring element, enhance productivity.Guarantee safety in production, the present invention is with PC control lift heavy amount of lifting mechanism and selecting from running-fit of speed threshold in the elevator machinery electric control loop, and hoist and the self shifter of luffing mechanism and delay locked, in rotating mechanism, the control rate self shifter and rise, braking delay locked.Its is suitable for various types of elevator machinery electrical controls, is convenient in the electric panel room that electrical equipment is installed in container-type.Make things convenient for the user to move.

Description

Program controlled electric device for hoisting machinery in loading container

The present invention relates to the electrical control gear of elevator machinery. particularly a kind of programmable controller that adopts in electric control circuit is simplified the electric wiring element. be convenient to concentrate the program controlled electric device for hoisting machinery in loading container in the electric panel room that is loaded on container-type.

At present the electrical control equipment of various big-and-middle-sized lifting equipments all is the relay that adopts various types. be contained on the control flow of various different purposes. realize the operation control to hoisting machinery. and control flow generally is mounted in the indoor of fixed building house. or part is contained in the control room on the crane. this kind equipment is whenever the change of hoisting machinery place to use. just need to remove resettlement and refitting. bring difficulty to use. increase many expenses. electrical control equipment is damaged. particularly derrick crane or bridge crane. the job site often changes. again by being exactly the electric control circuit that forms big-and-middle-sized hoisting machinery with discrete relay. complex circuit, fault are many. bring difficulty to operation and maintenance.

The purpose of this invention is to provide a kind of simplification control path. improve the reliability of electrical control equipment. be convenient to realize that control panel is installed in the program controlled electric device for hoisting machinery in loading container that the container-type electric panel room is interior and can make things convenient for change control to require at any time.

The present invention realizes as follows:program controlled electric device for hoisting machinery in loading container. be to hoist; Luffing; Rotation electric controling screen and rotor speed adjusting resistance, to concentrate and be loaded in the electric panel room of container-type. adopt the lower column circuits of programmable controller (PC) control in control circuit: in the lift control circuit. with PC control realize lift heavy amount and speed stage from selecting movingly. speed stage auto-changing and delay locked. and automatic disconnection control circuit power supply during gear shift. in the luffing control circuit. realize that with PC control speed stage auto-changing and delay locked .(are in rotation control circuit. delay locked when realizing speed stage auto-changing and speed-change process and braking with PC control .) in rotation control circuit. delay locked when controlling realization speed stage auto-changing and speed-change process and braking with PC.

The lift heavy amount of lifting control circuit and speed stage be that weighing result (GXK) input PC. with electronic scale is with giving gear and the lift heavy amount proportioning of putting in the PC from selecting movingly. control fluid drive motor (101XC) carries out fluid drive and selects. carry out gear shift result (SXK) input PC. shifted. hoist and the automatic shifting speed-variable of luffing control circuit. be to connect intermediate relay ZJ with PC output. the JSC normal opened contact that the shifted contactor JSC. in the starting control loop uses upper level is inputted PC. as the initiating signal of next stage and is locked with PC between two grades and delay time. After time-delay; Can start subordinate's gear. the autoshift speed change of rotation control circuit. be with PC output direct control motor forward and backward contactless switch. control shifted contactless switch JSC. with the contact input PC of forward and backward contactless switch and quicken step by step. between two grades of speed, give the time of putting with PC. delay locked. the time-delay between two grades. glancing impact is set time-delay with PC and is braked.

The present invention adopts programmable controller that the elevator machinery electric control circuit is carried out control. and the regulator cubicle wiring is reduced. be convenient to install and the change debugging. can improve the reliability of electric control system. safeguard simple. and the raising of production efficiency had positive effect.

Fig. 1 is PC host computer control figure of the present invention.

Fig. 2 is a PC striking machine control chart of the present invention.

Fig. 3 is the present invention's circuit controling drawing that hoists.

Fig. 4 is a luffing circuit controling drawing of the present invention.

Fig. 5 is a luffing mechanism electric machine speed regulation control chart of the present invention.

Fig. 6 is a rotating mechanism electric machine speed regulation control chart of the present invention.

Below in conjunction with accompanying drawing the present invention is described in further detail:

Embodiment. the present invention is adapted to crane machine: in the crane machine of 31500KNM.The control that is used for electric loop is: the control of the electrical control of the electrical control of lifting mechanism, the electrical control of luffing mechanism, rotating mechanism, cart operation braking. for improving the reliability of electrical equipment. strengthen the safety of tower crane operation. and simplify the tie lines of electrical equipment.Be convenient in the electric panel room that electrical equipment is installed in container-type. make things convenient for the user to move. so in electric control loop, adopt programmable controller (PC). the part critical circuits is implemented control. the control situation is as follows:

In the electric control loop of lifting mechanism. shown in Figure 5 as Fig. 2 Fig. 3. because the dragging motor capacity of this mechanism is big. thereby corresponding contactless switch capacity is big. with the retarder of contactless switch JSC. lifting mechanism the fourth gear ratio is arranged so start corresponding speed governing with intermediate relay ZJ in the output of PC. can be during work according to the lift heavy size. select corresponding gear. obtain four kinds of different rising or falling speeds. to increase work efficiency. the action of the gearshift that hoists control by PC. and gear can be selected automatically. also can manually select. the eddy current system device of the feedback of rotor current is with in the speed governing system employing. as shown in Figure 5, it is basic identical with the speed-regulating scheme of luffing mechanism to hoist. Therefore, omited lifting mechanism speed governing system figure, unique difference is a mechanical hatching gate. only one of lifting mechanism. luffing mechanism has two. the automatic selection gear of lifting mechanism is: before the lifting. universal seclector 102LK is placed midway location (as shown in Figure 2). click 101AN. and turn to fourth speed through the 101XC. gearshift. operate 201LK(Fig. 4 then) lifting mechanism hangs ground to weight with jogging speed (4 meters/minute). stop .PC just according to the weighing result of electronic scales (1GXK～4GXK) and the position of gear (and 1SXK～4SXK). through logic operation. make the corresponding speed stage of gearshift automatic steering and lift heavy. the lift heavy of present embodiment and speed threshold dispose and are: 32 tons of .16 rice/minute .50 ton .12 rice/minute .80 tons, 8 meters/minute .125 tons, 4 meters/minute. speed gear shift delay locked at Fig. 2, Fig. 3, among Fig. 5. by PC give put time input 102JSC get electric after, through delaying time 0.3 second. output 103ZJ gets. and input 103JSC gets. delayed time 0.15 second, output is after 104ZJ gets electric .101ZC or 101FC dead electricity. delay time promptly stopped after the .105ZJ dead electricity in 0.5 second hoisting or descend after, just cut off the power supply through 0.5 second 105ZJ, electric tool braking is worked simultaneously with electric braking. reduce the wearing and tearing of mechanical brake. above time set only is to set for the explanation course of action. and actual value should be determined according to the actual conditions debugging. and it is identical that following said PC gives the time of putting.In lifting mechanism control, automatic cutout control power supply during gear shift. be as Fig. 2, shown in Figure 3. during gear shift. through the PC logic operation. 106ZJ is got.101LYI carries out and disconnects the control power supply among starting Fig. 3.Manually select the lifting mechanism gear shift. in Fig. 2, the 102LK operation is in other four positions (101LK is at the 5th grade among certain Fig. 3) .PC just makes gearshift turn to corresponding gear by the requirement of manual selection.

The autoshift of luffing mechanism control loop and delay locked identical with lifting mechanism. do not repeat. the public can understand according to Fig. 1, Fig. 4. and luffing mechanism control all starts with " 2 " word. after luffing mechanism has two mechanical hatching gate .PC output 205ZJ outage. through delaying time 0.5 second. just disconnect. the 205ZJ contact disconnects .202ZDC outage .202TZD band-type brake rotor among Fig. 4.So 201TZD and 202TZD be band-type brake when stopping luffing simultaneously not, in the hope of the balance on the mechanical braking.

Rotating mechanism control. at Fig. 1, have two rotating machines among Fig. 6. all adopt rotor resistance and eddy-current brake mode of speed control. because of rotary inertia big. level and smooth for making revolution operation. reduce and switch moment. rotor resistance is five grades six grades. braking procedure is a level Four. each rotor contactless switch of rotating mechanism is controlled by PC. time closing or disconnection at different levels in speedup and when slowing down. make rotating mechanism can not cause vibrations by emergency braking. the level Four of the preceding level Four of starting process and braking procedure is by master controller 301LK manual switchover in Fig. 1. for preventing driver's shelves maloperation more. interlock by the PC internal timer. guaranteed, switch between the glancing impact level and still have short time time-delay. to have guaranteed, that brakes is steady. and the back two-stage of starting process is automaticallyed switch by the control of PC internal timer. and the time meter of starting process is set at respectively: 301JSC(306JSC)～305JSC(310JSC): 3 seconds, 1.5 second, 0.75 second, 0.4 second, 0.2 second.The time meter of braking procedure is set at 303JSC(308JSC respectively)～301JSC(306JSC) .3 second, 1.5 second, 1.2 second. for preventing the switching of bypassing the immediate leadership out of control of indivedual contactless switchs. 301ZC, 301FC, 301JSC, 302JSC is controlled as the input of PC, and controls without the PC internal relay. .301ZK in the 3ZK contact representative graph 6 among Fig. 1,302ZK, the 303ZK series connection. its input makes PC judge whether the major loop working power is connected. and the .4ZK that whether can work is just representing the cart operation, the contactless switch 401ZC of anti-running, after 401FC .4ZK in parallel disconnects. export through PC. meet 401XC. and disconnect the braking of band-type brake power supply 4TZD band-type brake cargo motor rotor through the normally closed contact of 401XC.

Other control of lifting mechanism, luffing mechanism is identical with conventional hoisting gear control loop with protection. as accompanying drawing 3, shown in Figure 4. do not repeat here.Wherein BJ is that super force moment protection contact ZK is by the source switch auxiliary contact, and ZXK, FXK are limit switches. shield.

Claims

1, a kind of program controlled electric device for hoisting machinery in loading container.It is with hoist, luffing, rotation electric controling screen and each rotor speed adjusting resistance, concentrate to be loaded in the electric panel room of container-type.It is characterized in that in control circuit, adopting programmable controller (PC) control:

The lift heavy amount of control circuit that hoists and selecting of speed stage from running-fit, the automatic conversion of speed stage and delay locked, automatic cutout control circuit power supply when reaching gear shift;

The automatic conversion of the speed stage of luffing control circuit and delay locked;

The automatic conversion of the speed stage of rotation control circuit and speed-change process and glancing impact delay locked.

2, according to the described program controlled electric device of claim 1. selecting from running-fit of the lift heavy amount of the control circuit that it is characterized in that hoisting and speed stage is that weighing result (GXK) input PC. with electronic scales gives gear and the lift heavy amount proportioning of putting in PC. and control autoshift motor (101XC) carries out the autoshift selection. and it is shifted that gear shift result (SXK) is imported the PC. execution.

3, according to the described program controlled electric device of claim 1. it is characterized in that hoisting and the autoshift speed change of luffing control circuit. be to connect intermediate relay ZJ with PC output. the shifted contactless switch JSC. in the starting control loop with the JSC normal opened contact of upper class as the cranking signal input PC. of next stage between two grades with PC locking time-delay. after delaying time, can start subordinate's gear.

4, according to the described program controlled electric device of claim 1. it is characterized in that the automatic conversion of rotation control circuit speed stage.Be with PC output direct control motor forward and backward contactless switch. control shifted contactless switch JSC. with the contact input PC. of forward and backward contactless switch and quicken step by step. between two grades of speed. give the time delays of putting with PC and lock; Time-delay glancing impact between two grades is set the time-delay braking with PC.