CN2440793Y

CN2440793Y - Automatic controller for four-rope grab buckets

Info

Publication number: CN2440793Y
Application number: CN 00239328
Authority: CN
Inventors: 何凌
Original assignee: Guangdong Shaoguan Iron & Steel Group Co ltd
Current assignee: Guangdong Shaoguan Iron & Steel Group Co ltd
Priority date: 2000-09-01
Filing date: 2000-09-01
Publication date: 2001-08-01
Anticipated expiration: 2010-09-01

Abstract

The utility model relates to an automatic controller for a four-rope grab bucket. The utility model overcomes the defects that the control of a lifting and on-off mechanism has no connection, the supporting force of two groups of steel cables is inhomogeneous, the steel cables are easily broken, the impulse for a mechanical mechanism and an electric element is strong, and the service life is short existing in the prior art. A main shaft of an electric machine is provided with a rotating disc on which an inducing block is arranged. A proximity switch is arranged on a support frame. A program controller is combined with a sensing signal of the proximity switch to control a contactor used for controlling the lifting and the on-off of the electric machine. The utility model has the advantages that the consumption for steel cables of a grab bucket is reduced, the phenomenon that ropes are frequently broken is avoided, the phenomenon that the electric machine is overloaded to be burnt is eliminated, the service life of an electrical apparatus element is long, reliability is high, selecting modes are various, usage is flexible and convenient, and security is high.

Description

The four rope grab automatic control device

The utility model relates to the four rope grab automatic control device that can be applicable to bridge-type, transfer crane and handling bridge.

China's widely used four rope grab mechanism controls device generally adopts two master controllers to control lifting independently, open and close two winding motors, as is applied to the PQR6 type control panel on the crane in bridge type.

Grab bucket lifting and switching by two motor-driven, during operation, start switching mechanism earlier, make grab bucket closed, start lifting mechanism again, loose ropeway carrying-rope is strained rapidly, the both sides motor drives simultaneously to grab bucket and rises then; During decline, two motors are started downwards simultaneously; When the needs discharging, lifting motor can be stopped, the switching motor is started downwards, grab bucket is opened.

Owing to there is no contact in lifting, the switching mechanism control, when operating the grab bucket closure and opening, be prone to one group of loose not stressing in two groups of steel ropes, another group is stressed separately, and a motor is exerted oneself separately, and stressed steel rope breaks because of overload.Simultaneously, because unbalance stress impacts greatly mechanical mechanism and electric elements, influence service life.For keeping lifting and switching rope evenly stressed as far as possible, need frequent crawl operation, had a strong impact on operating speed, capacity rating is not high.

The purpose of this utility model is to provide a kind of assurance grab bucket when opening with complete closure fully, the motor that relevant work can stop timely and accurately, in control, lifting and on-off action are matched, be closely connected, avoid occurring the four rope grab automatic control device of two groups of rope unbalance stress.

For realizing the purpose of this utility model, described four rope grab automatic control device comprises programming controller, the motor 5 of control grab bucket lifting and switching, the contactless switch of control motor 5 liftings and switching.

On every motor 5 main shafts, be provided with rotating disc 2, there are two centers and electrical axis line 6 distances to be wired to the sensor block 4 of a proper angle above the described rotating disc 2, be equipped with two near switch 3 on each rotating disc 2 cooresponding support 1, described center and electrical axis line 6 near switch 3 lines of centres intersects, and equates with the distance of sensor block 4 to the electrical axis line near the distance of switch 3 to electrical axis line 6.

The open contact 1J of relay 1J in the described programming controller is connected in series with normally closed contact 1FC and the contactless coil 1ZC of the normally closed contact 2J of relay 2J, contactless switch 1FC; The open contact 3J of relay 3J in the programming controller is connected in series with normally closed contact 2FC and the contactless coil 2ZC of the normally closed contact 4J of relay 4J, contactless switch 2FC; Above-mentioned two lifting rotating control loops are connected on the power supply;

The open contact 2J of relay 2J in the described programming controller is connected in series with normally closed contact 1ZC and the contactless coil 1FC of the normally closed contact 1J of relay 1J, contactless switch 1ZC; The open contact 4J of relay 4J in the programming controller is connected in series with normally closed contact 2ZC and the contactless coil 2FC of the normally closed contact 3J of relay 3J, contactless switch 2ZC; Above-mentioned two switching rotating control loops are connected on the power supply;

The open contact 5J of relay 5J in the described programming controller is connected in series with the resistance contactor coil 1JSC of control four rope grab lifting; The open contact 6J of relay 6J in the programming controller connects with the first open contact 1JSC1 and the resistance contactor coil 3JSC of resistance contactor 1JSC; The open contact 7J of the relay J 7 in the programming controller connects with the second open contact 1JSC2, resistance contactor 3JSC open contact 3JSC and the resistance contactor coil 5JSC of resistance contactor 1JSC; Above-mentioned three lifting control loops are connected on the power supply;

The open contact 8J of relay 8J in the described programming controller is connected in series with the resistance contactor coil 2JSC of control four rope grab lifting; The open contact 9J of relay 9J in the programming controller connects with the first open contact 2JSC1 and the resistance contactor coil 4JSC of resistance contactor 2JSC; The open contact 10J of relay 10J in the programming controller connects with the second open contact 2JSC2, resistance contactor 4JSC open contact 4JSC and the resistance contactor coil 6JSC of resistance contactor 2JSC; Above-mentioned three open and close controlling loops are connected on the power supply.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the sensing device structural representation.

Fig. 2 is that A among Fig. 1 is to view.

Fig. 3 is that B among Fig. 1 is to view.

Fig. 4 is the programming controller systematic schematic diagram.

Fig. 5 is a lifting open and close controlling electrical schematic diagram.

Fig. 6 is a program flow diagram.

Fig. 7 is a programming ladder diagram.

Below in conjunction with accompanying drawing, the embodiment of the utility model four rope grab automatic control device is described in further detail:

As shown in Fig. 1,2,3, the utility model four rope grab automatic control device comprises that two overlap independently sensing device, a rotating disc 2 is arranged in every cover sensing device, two sensor blocks 4, two supports 1, two near switch 3, and motor shaft is between two supports 1, and two are separately positioned on two supports 1 near switch 3.When motor 5 rotation make near switch 3 and sensor block 4 over against the time, will export pulse, when hand of rotation changed, the two pulse signals phase place can change, and can obtain the motor rotation number of turns and direction signal thus.By recording the impulse singla of motor rotation near switch 3, sensor block 4 in the sensing device, the input routine controller is counted the phase bit comparison, draws motor and rotates the number of turns and motor hand of rotation, and motor rotates the number of turns can reflect the steel rope movable length.Through the programming controller internal arithmetic relatively, draw the length difference that opens and closes rope and lifting, (grab bucket is by being closed into fully when opening fully for this difference and zero-sum setting value, open and close the rope movable length) relatively, open fully and complete closure signal thereby obtain grab bucket,, thereby guarantee that two groups of ropes are evenly stressed by this signal limitations and the relevant action of permission, do not go out groove, the motor nonoverload.

This device is realized automatic guidance by control circuit in the programming controller and programming controller software, and lifting opens and closes motor main circuit and grabs with reference to general 10t bridge.

Programmable controller is the FX2-64MR of a Mitsubishi type, and the soft element arrangement sees Table 1.

As shown in Figure 4, in the programming controller circuit, described have four near switch 3, is respectively 1JK, 2JK and 3JK, 4JK, is connected on X0, X1 and X2, the X3 end of programming controller.When lifting or the rotation of switching motor, the inductive impulse signal is by X0, X1, X2, X3 end input chip PC, count by chip PC internal counter, obtain lifting or open and close the steel rope movable length, by establish into compute mode, obtain various limit signals, guarantee that grab bucket is evenly stressed, motor is evenly exerted oneself.

Described lifting master controller 1KZ has one group of contact to be connected to the X30 of programming controller, X31; Opening and closing master controller 2KZ has one group of contact to be connected to the X32 of programming controller, X33 end.

Described lifting master controller is provided with the operation select switch 1XK that is connected to the RUN end; Be connected to X10, X11, X12, X13 and X14 end and carry out the working mode selection switch 2XK that operating mode is selected; Be connected to the heavy select switch 3XK that grabs of X20, X21, X22 and X23 end.

Hold in the Y10 of programming controller with the coil tandem of relay 5J after the open contact 1J of described

relay

1J, 2J, the 2J parallel connection; The open contact 5J of described relay 5J and the coil tandem of relay 6J are in the Y11 of programming controller end; The open contact 6J of described relay 6J and the coil tandem of relay 7J are in the Y12 of programming controller end; Hold in the Y20 of programming controller with the coil tandem of relay 8J after the open contact 3J of described relay 3J, 4J, the 4J parallel connection; The open contact 8J of described relay 8J and the coil tandem of relay 9J are in the Y21 of programming controller end; The open contact 9J of described relay 9J and the coil tandem of relay 10J are in the Y22 of programming controller end.

1K is the PC power source switch; 1JK, 2JK be on the lifting motor sensor near switch, 3JK, 4JK for open and close on the electromechanical transducer near switch, 1JK and 2JK produce the two-way pulse and enter PC two-phase A, B facies pattern counting machine C254 by X0, X1 terminal, and 3JK and 4JK produce the two-way pulse and enter PC two-phase A, B facies pattern counting machine C255 by X3, X4 terminal; 1XK is the PC run switch; 2XK is the Operation Mode Selection switch, totally five grades, by PC X10～X14 terminal input, is respectively debud mode, manual mode, automated manner 1, automated manner 2, automated manner 3 respectively; 3XK links PCX20～X23 terminal for the heavy functional select switch of grabbing, and is divided into fourth gear, realizes respectively not having heavyly grabbing, heavyly grabbing 1, heavyly grab 2, heavyly grab 3; 1AK～4AK is a button, and 1AK is the setting value load button, links the X15 terminal, and 2AK is the counting machine reset button, links the X16 terminal, and 3AK connects button for sinking to grab to trigger, and links the X17 terminal, and 4AK is the heavy pause button of grabbing, binding X25 terminal.The normally closed contact 2J of relay 2J and the coil tandem of relay 1J are in the Y0 of programming controller end, the normally closed contact 1J of relay 1J and the coil tandem of relay 2J are in the Y1 of programming controller end, the normally closed contact 4J of relay 4J and the coil tandem of relay 3J are in the Y2 of programming controller end, and the normally closed contact 3J of relay 3J and the coil tandem of relay 4J are in the Y3 of programming controller end.1KZ is the lifting master controller, and forward is imported by X30, is oppositely imported by X31; 2KZ is for opening and closing master controller, forward is imported by X32, oppositely import by X33, the user handles 1KZ, 2KZ master controller, X30～33 end picked up signal, through the PC inter-process, the 1J～4J lifting that drives by Y0～Y3 output opens and closes intermediate relay, relay corresponding contacts control lifting motor contactless switch 1ZC, 1FC and switching motor contactless switch 2ZC, 2FC, thus make grab bucket produce various corresponding actions.1J～4J is respectively ascending, descending, closes, starts and make intermediate relay, links Y0～Y3 mouth; 5J～7J is a lifting gear ohm relay, links Y10～Y12, and 8J～10J links Y20～Y22 for opening and closing the gear ohm relay, corresponding contactless switch in the difference control chart 5 of the relevant contact of 1J～10J; 1XD～10XD is respectively status indicator lamp, 1XK is the input indication, 2XK is the counting machine indication that resets, 3XK is for falling indication slowly, 4XD grabs indication for sinking, and 5XD, 6XD are extracting, the indication that hoists, and 7XD, 8XD are respectively halliard and open and close the rope limes superiors and indicate, 9XD, 10XD are for complete closure and open indication fully, and corresponding PC terminal is seen figure.

As shown in Figure 5,2K is a source switch; LYJ is the zero-bit no-voltage relay, constitutes protective circuit with 1KZ, 2KZ etc.Described lifting master controller 1KZ and switching master controller 2KZ are serially connected with in the serial connection loop of current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ in the motor.When overcurrent condition appearred in motor, normally closed interlock disconnected, and the control loop outage plays overcurrent protection.Be provided with zero-bit no-voltage relay coil LYJ in the serial connection loop of current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ in described motor, its normally closed interlock LYJ is serially connected in after the serial connection loop of current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ in the motor in the power circuit between other serial connection loop.When the car load power supply disappears no-voltage relay coil LYJ decompression, control loop dead electricity; If master controller 1KZ, 2KZ be at the zero-bit shelves, then during power up, motor can not start voluntarily; Have only master controller 1KZ, 2KZ to be in the zero-bit shelves, could handle master controller actuating motor once more; Play the zero position protection effect.1X and 2X are terminal point protection travel switch, and described two lifting rotating control loops also connect the back and are connected in series and are connected on the power supply with terminal point protection travel switch 1X, 2X, and any one travel switch disconnection will stop lift work.1ZC, 2ZC, 1FC, 2FC are lifting and open and close counter-rotating contactless switch under the motor; 1JSC, 3JSC, 5JSC are lifting motor rotor resistance contactless switch; 2JSC, 4JSC, 6JSC are for opening and closing the rotor resistance contactor.

Programming controller PC model is the FX2-64MR of a Mitsubishi type.

Table 1 is listed the used main soft element title of programming controller, symbol and function, comprises timer, counting machine, data register and program pointer etc.

As shown in Figure 6, flow chart comprises startup, judgement, comparison, each subprogram, end etc.

As shown in Figure 7, this is a programming ladder diagram, and parameter specifically is provided with according to actual conditions to be determined.

This installs dual terminal point protection and is realized by the soft terminal point of limit switch and software set.

The utility model can reduce steel wire rope of grab bucket consumption than prior art, avoids frequent disconnected rope, eliminates lifting and opens Close motor because of the overload burning of exerting oneself separately; Do not need the moving operation of frequency, greatly prolonged the life-span of electric elements, raising can By property, there is multiple mode of operation available, flexible and convenient to use, the security that dual terminal point protection has improved equipment.

Table 1

Title	Symbol	Function
Title	Symbol	Function	Timer	T200～T202 T203～T205 T206～T209 T210～T214	The time-delay of lifting gear opens and closes gear delay fault crawl automatic time delay
			Timer	T200～T202 T203～T205 T206～T209 T210～T214
			Counter	C254 C255 C150	Halliard moves counting and opens and closes the mobile counting of rope action frequency
			Counter	C254 C255 C150
			Data register	D0 D1 D2 D3 D100 D101 D102 D103 D104 D105 D106 D107 D108 D109 D110 D111 D112 D113 D114 D115 D200 D201	C254 value is heavy when grabbing beginning when grabbing beginning C255-C254 value that C255-C254 difference D200 D201-K20 difference is heavy is heavy grabbing to descend and sets value D102 D103 * D104 D105 D106 D107 D108 D109 ÷ (K5 * 1915) C254-D100 D101 and close fully to offering fully and decide
			Data register
			Program pointer	P0 P1 P2 P3 P4 P10 P20 P21 P30 P31	The automatic methods of operation of the automatic method of operation of the automatic method of operation of the manual method of operation of commissioning test mode 123 are heavy grabs automated manner 1 does not have and falls slowly automated manner 1 and have to fall slowly and open and close automated manner 2 after the automated manner 2 first liftings and opens and closes earlier afterwards lifting
Annotate: input, output auxiliary reclay are slightly			Program pointer	P0 P1 P2 P3 P4 P10 P20 P21 P30 P31

Claims

1. a four rope grab automatic control device comprises programming controller, the motor (5) of control grab bucket lifting and switching, and the contactless switch of control motor (5) lifting and switching is characterized in that:

On every motor (5) main shaft, be provided with rotating disc (2), there is two centers and electrical axis line (6) distance to be wired to the sensor block (4) of a proper angle above the described rotating disc (2), be equipped with two on the cooresponding support of each rotating disc (2) (1) near switch (3), described center and electrical axis line (6) near switch (3) line of centres intersects, and equates with the distance of sensor block (4) to the electrical axis line near the distance of switch (3) to electrical axis line (6);

2. four rope grab automatic control device according to claim 1 is characterized in that described two lifting rotating control loops and connects the back being connected in series and being connected on the power supply with terminal point protection travel switch 1X, 2X.

3. four rope grab automatic control device according to claim 1 is characterized in that current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ are serially connected with on the power supply in the described motor.

4. four rope grab automatic control device according to claim 3 is characterized in that described lifting master controller 1KZ and opens and closes master controller 2KZ being serially connected with in the serial connection loop of current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ in the motor.

5. four rope grab automatic control device according to claim 3, it is characterized in that being provided with zero-bit no-voltage relay coil LYJ in the serial connection loop of current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ in described motor, its normally closed interlock LYJ is serially connected in after the serial connection loop of current relay normally closed interlock 1LJ, 2LJ, 3LJ and 4LJ in the motor in the power circuit between other serial connection loop.

6. according to claim 1,2,3,4 or 5 described four rope grab automatic control devices, it is characterized in that described X0 X1 and X2, the X3 end that is connected on programming controller near switch (3) 1JK, 2JK and 3JK, 4JK respectively.The normally closed contact 2J of relay 2J and the coil tandem of relay 1J are in the Y0 of programming controller end, the normally closed contact 1J of relay 1J and the coil tandem of relay 2J are in the Y1 of programming controller end, the normally closed contact 4J of relay 4J and the coil tandem of relay 3J are in the Y2 of programming controller end, and the normally closed contact 3J of relay 3J and the coil tandem of relay 4J are in the Y3 of programming controller end.

7. four rope grab automatic control device according to claim 4 is characterized in that described lifting master controller 1KZ has one group of contact to be connected to the X30 of programming controller, X31; Opening and closing master controller 2KZ has one group of contact to be connected to the X32 of programming controller, X33 end.

8. according to claim 1,2,3,4 or 5 described four rope grab automatic control devices, it is characterized in that described lifting master controller is provided with the operation select switch 1XK that is connected to the RUN end; Be connected to X10, X11, X12, X13 and X14 end and carry out the working mode selection switch 2XK that operating mode is selected; Be connected to the heavy select switch 3XK that grabs of X20, X21, X22 and X23 end.

9. four rope grab automatic control device according to claim 6 is characterized in that behind the open contact 1J, 2J parallel connection of described relay 1J, 2J that coil tandem with relay 5J is in the Y10 of programming controller end; The open contact 5J of described relay 5J and the coil tandem of relay 6J are in the Y11 of programming controller end; The open contact 6J of described relay 6J and the coil tandem of relay 7J are in the Y12 of programming controller end; Hold in the Y20 of programming controller with the coil tandem of relay 8J after the open contact 3J of described relay 3J, 4J, the 4J parallel connection; The open contact 8J of described relay 8J and the coil tandem of relay 9J are in the Y21 of programming controller end; The open contact 9J of described relay 9J and the coil tandem of relay 10J are in the Y22 of programming controller end.