CN201667018U - Automatic feeding and discharging control circuit of ground tank - Google Patents

Abstract

An automatic feeding and discharging control circuit of a ground tank comprises a power circuit 1, a motor circuit 3 consisting of a valve motor, a discharging motor and a feeding motor, an alternating current contactor circuit 2 for controlling the running mode of three motors in the motor circuit, a 24V direct current power circuit 4, an external control loop circuit 5 formed by the coil parts of all alternating current contactors, a status indicator lamp circuit 6, a small-size programmable logic controller Siemens CPU224 module 7 with written programs, and an EM221 Siemens expansion module 8. The control circuit adopts a mode of full electric control to control the work of all the motors and a butterfly valve and can realize the function of automatic feeding and discharging of materials in the ground tank with different cycling times and cycling processes set according to different requirements, thus achieving the purpose of safer and easier humanized operation with more labor saved.

Description

Ground tanks automatic feed/discharge control circuit

Technical field

The utility model relates to a kind of control technology of ground tanks material turnover.

Background technology

Mechanical type control is mostly adopted in the input and output of present existing ground tanks material, and troublesome poeration needs operating personnel to switch labor intensive back and forth between tank deck and each valve at jar end.

Summary of the invention

The purpose of this utility model will provide a kind of ground tanks automatic feed/discharge control circuit exactly, realizes the Automatic Cycle control of the input and output of ground tanks material by controller, electrically operated valve, motor and pressure switch etc., realizes remote intellectualized operation.

The technical solution of the utility model is achieved in that a kind of ground tanks automatic feed/discharge control circuit, its characteristics: the external control loop circuit 5 that the coiler part of the A.C. contactor circuit 2 of the motor circuit 3 that it comprises power circuit 1, be made up of valve driving machine, discharging motor and charging motor, the drive manner of three motors in the control motor circuit, 24V DC power supply circuit 4, each A.C. contactor is formed, status indicator lamp circuit 6, with small-sized programmable logic controller Siemens CPU224 module 7, the EM221 Siemens expansion module 8 of program; Output point Q0.0 in Siemens CPU224 module, Q0.1, Q0.2, Q0.3, Q0.4, Q0.5 respectively and be connected to the auxiliary reclay coil KA1 of control discharging motor between power supply low side M point, the auxiliary reclay coil KA2 of control charging motor, the auxiliary reclay coil KA3 that control inlet valve motor is just changeing, the auxiliary reclay coil KA4 of control inlet valve motor counter-rotating, the auxiliary reclay coil KA5 that control bleeder valve motor is just changeing, the auxiliary reclay coil KA6 of control bleeder valve motor counter-rotating; At input point I0.1, the I0.2 of Siemens CPU224 module, I0.3, I0.4, I0.5, I0.6, I0.7, I1.0, I1.1 respectively and be connected to start button QD, scram button JT, time relay contact ST, tensimeter high pressure spot switch GY, tensimeter low pressure point switch DY, inlet valve between the high-end L+ point of power supply and reach a contact KA7, inlet valve and close that the contact KA8 that puts in place, bleeder valve reach a contact KA9, bleeder valve closes the contact KA10 that puts in place; At input point I2.0, the I2.1 of EM221 Siemens expansion module, I2.2, I2.3 respectively and be connected to discharging electric motor starting button SB1, discharging motor stop button SB2, charging electric motor starting button SB3, charging motor stop button SB4 between the high-end L+ point of power supply.

The utility model has been discarded traditional mechanical control model, all valves have all adopted electrically operated valve, dispose pressure detection switch, control the running of whole ground tanks with PLC, as required the program that weaves is write into PLC, control the work of the whole input and output material circulation system by the program of PLC, thereby finish the automatic turnover of the material in the ground tanks, the utility model has reduced labor intensity of operating personnel, whole input and output material process can realize full automation operation, starts and stop button just can be realized the function that the input and output material everything is finished automatically as long as press.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model.

1-power circuit among Fig. 1; 2-A.C. contactor circuit; the 3-motor circuit; the 4-24V DC power supply circuit; 5-external control loop circuit; 6-status indicator lamp circuit; 7-Siemens CPU224 module (small-sized programmable PLC logic controller); 8-EM221 Siemens expansion module; the auxiliary reclay coil of KA1-control discharging motor; the auxiliary reclay coil of KA2-control charging motor; the auxiliary reclay coil that KA3-control inlet valve motor is just changeing; the auxiliary reclay coil of KA4-control inlet valve motor counter-rotating; the auxiliary reclay coil that KA5-control bleeder valve motor is just changeing; the auxiliary reclay coil of KA6-control bleeder valve motor counter-rotating; the KA7-inlet valve reaches a contact; the KA8-inlet valve closes the contact that puts in place; the KA9-bleeder valve reaches a contact; the KA10-bleeder valve closes the contact that puts in place; the DYGZ-power failure lamp, QL1; QL2-power circuit breaker auxiliary contact, the J-phase failure and phase sequence relay; the QD-start button; the JT-scram button, ST-time relay contact, GY-tensimeter high pressure spot switch; DY-tensimeter low pressure point switch; SB1-discharging electric motor starting button, SB2-discharging motor stop button, SB3-charging electric motor starting button; SB4-charging motor stop button, the L+-24V power supply.

Embodiment

From Fig. 1 as seen: the utility model by 1～8 totally eight circuit form, power circuit 1 provides power supply for the other parts circuit, adopt three-phase four-wire system, for motor circuit 3 provides 380V power supply, for external control loop circuit 5 and 24V DC power supply circuit 4 provide 220V power supply.A.C. contactor circuit 2 is the contact part of A.C. contactor, by drive manner---rotating, the direct start-stop of star trigonometric sum of three motors in its control motor circuit 3.Motor circuit 3 is made up of valve driving machine, discharging motor and charging motor.24V DC power supply circuit 4 be will input the 220V AC power change the 24V direct supply into, for PLC circuit 7 and status indicator lamp circuit 6 provide power supply.External control loop circuit 5 includes the coiler part of each A.C. contactor, whether the adhesive of the coil of each A.C. contactor is being controlled the operation of each motor and is being stopped, and control discharging motor is pressed the operation of star triangular pattern, the charging motor is by direct Starting mode operation, and the charging/discharging valve motor moves by the rotating mode; Charging/discharging valve has five pairs of contacts respectively, representative respectively: open, close, fault, open and put in place, close and put in place, corresponding contact was connected when what state valve be positioned at, again by these contacts by controlling the break-make that other auxiliary reclays come the pilot lamp of state of a control indicator light circuit 6.Status indicator lamp circuit 6 is controlled by external control loop circuit 5, is used to refer to current working state, as stopping and putting in place the on off state indication etc. of indication and indicating fault, charging/discharging valve of the switch of running status indication, charging/discharging valve of motor.

Siemens CPU224 module 7 and EM221 expansion module 8, the cyclic process of The whole control circuit is controlled by it, and the control program that will realize writes in advance, is downloaded to CPU224, according to the break-make of the input point of two modules, by the programmed control output point.As shown in Figure 1: the output point Q0.0～Q0.5 of CPU224 module has connect the coil of six middle transition relay K A1～KA6, remove to control the coil of several A.C. contactors again by the contact of these six auxiliary reclays, the contact control input and output material motor of A.C. contactor and the working method of valve driving machine.The start and stop of output point Q0.0 control discharging motor and the working method of star triangle, the start and stop of output point Q0.1 control charging motor and the working method that directly starts, output point Q0.2 control inlet valve motor is just changeing the working method of opening, the working method that the counter-rotating of output point Q0.3 control inlet valve motor is closed, output point Q0.4 control bleeder valve motor is just changeing the working method of opening, the working method that the counter-rotating of output point Q0.5 control bleeder valve motor is closed.

When starting working, when pressing start button QD or charging electric motor starting button SB3, promptly input point I0.1 or I2.2 get when electric, and output point Q0.2 and Q0.5 have output, auxiliary reclay KA3 and KA6 work, and inlet valve is opened, and bleeder valve cuts out.Open when inlet valve and to put in place, bleeder valve cuts out when putting in place, inlet valve reaches a contact KA7 and bleeder valve closes the contact KA10 connection that puts in place, input point I0.6 and I1.1 get, output point Q0.1 has output at this moment, auxiliary reclay KA2 control charging motor entry into service charging, time relay ST picks up counting, after arriving setting-up time, this moment, material advanced the canful body, the closing of contact of time relay ST, and promptly input point I0.3 gets, the output of output point Q0.1 is cut off in programmed control, and the charging motor is promptly out of service.After the charging motor stops; program setting stops 5 seconds; output point Q0.3 has output after 5 seconds; inlet valve is closed in the counter-rotating of auxiliary reclay KA4 control inlet valve motor; when inlet valve cuts out when putting in place; inlet valve closes the contact KA8 that puts in place to be connected; be that input point I0.7 has input; output point Q0.0 has output; auxiliary reclay KA1 control discharging motor is started working; beginning brings into operation in the mode of star triangle start; if the phase sequence wrong or the phase failure; the then phase failure and phase sequence relay J work; its normally closed contact is opened; the phase failure and phase sequence relay normally closed contact J are connected between the input point I0.0 and the high-end L+ point of power supply of small-sized programmable logic controller Siemens CPU224 module; the input that is input point I0.0 disconnects; discharging this moment motor will quit work, and must can work after readjusting correctly, after the discharging machine operation; driving air compressor machine inflates to tank body; when the atmospheric pressure value of tank body arrived predetermined high-voltage value, promptly tensimeter high pressure spot switch GY connected, and input point I0.4 gets when electric; Q0.4 has output; auxiliary reclay KA5 control discharging butterfly valve is opened, and the bleeder valve motor is just changeing opens bleeder valve, and this moment, tank body air pressure began to descend.The bleeder valve motor is worked bleeder valve when opening the state that puts in place always, and bleeder valve reaches a contact KA9 job, and its normal battle is connected, and input point I1.0 has input, and then the bleeder valve motor will quit work.When the pressure of tank body dropped to the low pressure point of setting, tensimeter low pressure point switch DY connected, and input point I0.5 gets electric, cut off the output of output point Q0.0 this moment, auxiliary reclay KA1 dead electricity, and the discharging motor is out of service.Program setting discharging this moment motor cuts out bleeder valve once more after stopping 20 seconds, open inlet valve, and next input and output material cyclic process begins again.If charging motor or discharging motor are when work, want to allow it stop, can pressing charging motor stop button SB4 or discharging motor stop button SB2, when promptly input point I2.3 or I2.1 have input, can allow corresponding motor quit work, but the motor of valve still can be worked.If want to allow it continue the work that stops previously, can press charging electric motor starting button SB3 or discharging electric motor starting button SB1, be input point I2.2 or I2.0 when input is arranged, then corresponding motor will restart and start working, and program will automatically perform the circulation of just having interrupted.

The output point Q0.6 of Siemens CPU224 module 7 and power supply low side M point are connected to power failure lamp DYGZ; Between the input point I1.2 of small-sized programmable logic controller Siemens CPU224 module and I1.3 and the high-end L+ of power supply, be connected to power circuit breaker auxiliary contact QL1 and QL2 respectively, when input point I1.2 or not input of I1.3, be that discharging motor power auxiliary contact QL1 or charging motor power auxiliary contact QL2 be not when connecting, output point Q0.6 has output, power failure lamp is lighted, circuit can't be worked, and need to check power supply, guarantee can work after it correctly.Input point I0.2 and power supply L+ termination have scram button JT, and circuit is in the process of work, and emergency condition need stop if running into, can press this button, this moment, input point I0.2 disconnected, and entire circuit will quit work, in the time of will working once more, need earlier this push-button reset.

Claims (4)

1. ground tanks automatic feed/discharge control circuit is characterized in that: external control loop circuit (5), status indicator lamp circuit (6), the small-sized programmable logic controller Siemens CPU224 module (7) with program, Siemens expansion module EM221 (8) that the coiler part of the A.C. contactor circuit (2) of the motor circuit (3) that it comprises power circuit (1), be made up of valve driving machine, discharging motor and charging motor, the drive manner of three motors in the control motor circuit, 24V DC power supply circuit (4), each A.C. contactor is formed; Output point Q0.0 in small-sized programmable logic controller Siemens CPU224 module, Q0.1, Q0.2, Q0.3, Q0.4, Q0.5 respectively and be connected to the auxiliary reclay coil (KA1) of control discharging motor between power supply low side (M) point, the auxiliary reclay coil (KA2) of control charging motor, the auxiliary reclay coil (KA3) that control inlet valve motor is just changeing, the auxiliary reclay coil (KA4) of control inlet valve motor counter-rotating, the auxiliary reclay coil (KA5) that control bleeder valve motor is just changeing, the auxiliary reclay coil (KA6) of control bleeder valve motor counter-rotating; Input point I0.1 in small-sized programmable logic controller Siemens CPU224 module, I0.2, I0.3, I0.4, I0.5, I0.6, I0.7, I1.0, I1.1 is connected to start button (QD) respectively and between power supply high-end (L+) point, scram button (JT), time relay contact (ST), tensimeter high pressure spot switch (GY), tensimeter low pressure point switch (DY), inlet valve reaches a contact (KA7), inlet valve closes the contact (KA8) that puts in place, bleeder valve reaches a contact (KA9), bleeder valve closes the contact (KA10) that puts in place; Input point I2.0, I2.1, I2.2, I2.3 at Siemens expansion module EM221 are connected to discharging electric motor starting button (SB1), discharging motor stop button (SB2), charging electric motor starting button (SB3), charging motor stop button (SB4) respectively and between power supply high-end (L+) point.

2. a kind of ground tanks automatic feed/discharge control circuit according to claim 1 is characterized in that: be connected to the phase failure and phase sequence relay normally closed contact (J) between the input point I0.0 of small-sized programmable logic controller Siemens CPU224 module and power supply high-end (L+) point.

3. a kind of ground tanks automatic feed/discharge control circuit according to claim 1 and 2 is characterized in that: be connected to power circuit breaker auxiliary contact QL1 and QL2 at the input point I1.2 of small-sized programmable logic controller Siemens CPU224 module and I1.3 and power supply high-end (L+).

4. a kind of ground tanks automatic feed/discharge control circuit according to claim 3 is characterized in that: be connected to power failure lamp (DYGZ) between the output point Q0.6 of small-sized programmable logic controller Siemens CPU224 module and power supply low side (M) point.

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