CN206421217U

CN206421217U - A kind of two-stage material-pushing centrifuge control device based on PID

Info

Publication number: CN206421217U
Application number: CN201720102819.8U
Authority: CN
Inventors: 杨有; 张二兵; 尚晋; 余平; 崔旭东
Original assignee: Chongqing Normal University
Current assignee: Chongqing Normal University
Priority date: 2017-01-23
Filing date: 2017-01-23
Publication date: 2017-08-18
Anticipated expiration: 2027-01-23

Abstract

The utility model discloses a kind of two-stage material-pushing centrifuge control device based on PID, using principle simple, practical, stably, inexpensive during design, its centrifuge RPMs is less than 3000r/min, suitable for separating the crystalloid of particle and the suspension of fiberous material, while also being adapted for the higher material of solid concentration in the suspension that needs are washed.The utility model hardware is made up of PLC, main motor, Oil pump electrical machinery, power module, sensor, electric prospection switch and some peripheral circuits.Not only working stability, it is easy to maintain, improve production efficiency and product quality, compared simultaneously with other using PLC with the control system of frequency converter, it is not only cost-effective, easily operated and maintenance, and the utility model, with controlling and automatically controlling two ways manually, flexible control mode has great convenience for the user to be operated.

Description

A kind of two-stage material-pushing centrifuge control device based on PID

Technical field

The utility model is related to automation control area, and in particular to a kind of two-stage material-pushing centrifuge control based on PID Device.

Background technology

Centrifuge is widely used in the industries such as food, pharmacy, agrochemical, chemical industry, and its development trend is saved towards intellectuality Change, specialized, maximization development^[1].The crystalloid or fibre of Centrifugal Machine Control System of the present utility model particle suitable for separation Tie up the suspension of shape material, such as potassium nitrate, potassium chloride, ammonium hydrogen carbonate, sodium sulphate, potassium sulfate, polyethylene, polypropylene, cellulose Deng the separation of material.

Centrifuge principle is to utilize centrifugal force, and the solid particle in suspension and liquid are separated, or by emulsion two Density difference is planted, but immiscible liquid is separated；It can also be used for excluding the liquid in wet solid.

Centrifuge is often used in the severe workplace of comparison, such as inflammable, explosive many dust, but its transmission system knot Structure is cumbersome, and mechanical wear is big, and faults frequent, traditional two-stage material-pushing centrifuge uses Control, and stability is poor, work effect Rate is low, easily by external interference.Fig. 1 is the traditional control relay circuit of two-stage material-pushing centrifuge, mainly by relay and switch, Contactor is constituted, because using relay and contactor composition chain control, wiring is complicated, and volume is big.Again because working environment is more Dirt is moist, easy break-down, and does not allow easy-to-search failure, is significantly reduced production efficiency.By known to analysis circuit figure：SA1 For total power switch, when pressing, power supply indicator HL1 is bright, and SB1 is Oil pump electrical machinery stop button, and SB2 is that Oil pump electrical machinery startup is pressed Button, SB3 main motor stop buttons, SB4 is mair motor start button.HL2 Oil pump electrical machinery run indicator, HL3 is main frame star Start indicator lamp, HL4 is main frame triangle run indicator.KT1, KT2, KT3 are timer, and KAn is auxiliary reclay coil, KMn is contactor coil (n is 1,2,3 ...) KA_i-jFor j-th of contact of i-th of auxiliary reclay, KM_i-jFor i-th of contactor J-th of contact, (i, j are 1,2,3 ...).

He Bo^[2]The failure that the two-stage material-pushing centrifuge using traditional Control easily occurs is described to have carried out point Analysis and improvement, but due to being still using traditional Control, it is difficult to fundamentally solve these problems and realize automatic control System.Yu Hao^[3]Frequency converter is added on the basis of traditional Control etc. describing, can effective controlled motor speed, but Fail preferably to carry out Automated condtrol.Li Shengli^[4]Describe and the centrifuge using Control is changed to Mitsubishi's series PLC controls, solve some problems that Control is brought, basically reached safety and stability, but debugging and maintenance are compared It is difficult.Guo Hongbin^[5]Yang Peiwen^[6]Speed regulating control is carried out using the PLC combinations frequency converter of west gate subfamily etc. describing, although can With the effect reached, but frequency converter is expensive, if batch production, can increase huge cost to company.Zhou Hongyan^[7]It is situated between Continue and speed regulating control is carried out to main motor using silver dollar series of PLC combination frequency conversion, while adding mode of operation judgement, i.e., manually Control and automatically control, single step run can be carried out using manual mode in debugging, simplify later maintenance difficulty.

Utility model content

In view of the shortcomings of the prior art, the utility model aims to provide a kind of two-stage material-pushing centrifuge control based on PID Device, the two-stage material-pushing centrifuge that traditional relay is controlled is changed to be controlled to replace with PLC, while saving frequency converter, saved into This, using star triangle start, can equally reach that starting current is small, the impact for preventing from starting current excessive causing power network.Separately Outside, in order to prevent charging is uneven from bringing too strong machine vibration, in addition to adding conventional vibration detecting sensor, while plus Enter closed loop controller, i.e. PID controller, the flow value and flow value set in advance that flow sensor is detected are contrasted, The aperture of electromagnetic valve is reduced if excessive, conversely, then increasing the aperture of valve, so can effectively be slowed down because charging is uneven It is even to bring too strong machine vibration.

To achieve these goals, the utility model is adopted the following technical scheme that：

A kind of two-stage material-pushing centrifuge control device based on PID, two-stage material-pushing centrifuge includes expects pipe, outer drum, interior Rotary drum, hydraulic drive system, pusher disk, cloth tray, main motor, Oil pump electrical machinery and charging magnetic valve, the outer drum and interior turn Drum from setting gradually and be interconnected inside outside, the pusher disk in the interior rotary drum and with the hydraulic drive system phase Connection；The expects pipe is connected with the cloth tray, and the cloth tray is connected to the pusher disk；The outer drum and interior rotary drum It is connected, and is connected with main motor with pusher disk；The Oil pump electrical machinery is connected to the hydraulic drive system by oil piping system； The charging magnetic valve is connected to the mouth of pipe of the expects pipe；

The two-stage material-pushing centrifuge control device based on PID includes PLC microprocessors, and the PLC microprocessors connect It is connected to the main motor, Oil pump electrical machinery and charging magnetic valve of the two-stage material-pushing centrifuge；In addition, the PLC microprocessors also connect Vibrating sensor and flow sensor are connected to, the vibrating sensor is arranged on machinery bed and flow sensor is located at described In the expects pipe of two-stage material-pushing centrifuge, and it is connected to PID controller；The PID controller is also attached to the PLC microprocessors Device.

Further, the PLC microprocessors are also attached to oil temperature sensor, and are connected with temperature alarm circuit.

Further, the PLC microprocessors are also attached to warning circuit.

Further, the PLC microprocessors are also associated with device start button, manual mode selection key, automatic mold Formula selection key, manually charging button, mair motor start button and Oil pump electrical machinery start button.

The method that two-stage material-pushing centrifuge control device based on PID carries out two-stage material-pushing centrifuge control, including it is as follows Step：

S1 is pressed after device start button, and power supply indicator is bright, while PLC microprocessors start self-inspection, after the completion of start Operation；

S2 presses Oil pump electrical machinery start button, and the Oil pump electrical machinery starts and brought into operation；After three minutes, PLC microprocessors Device sends enabling signal to main motor, the automatic star reduced-voltage starting of main motor, and after 15 second, main motor power frequency full speed running, Meanwhile, PLC microprocessors send enabling signal to magnetic valve, and magnetic valve is opened, and material initially enters expects pipe, and flow sensor will The current value that the signal read switchs to 4-20ma is sent in PID controller by A/D conversions, and PID controller is by the numerical value and in advance If value is contrasted, and sends signal according to comparing result to PLC microprocessors, by opening for PLC microprocessor controls solenoid valves Degree, with the equilibrium of control material flow, when higher than preset value, control electromagnetism valve opening diminishes, and when less than preset value, then controls Electromagnetism valve opening processed becomes big；The vibration signal of detection is sent to PLC by vibrating sensor, if the amplitude mistake of vibration Greatly, PLC control main motor stalling；

S3 materials are distributed in the cloth tray of two-stage material-pushing centrifuge through expects pipe, under the driving of main motor pusher disk together with Cloth disc spins, material is thrown on the foraminate interior rotary drum of the band of two-stage material-pushing centrifuge in centrifugal action, in material Liquid flows out from aperture, and solid filter residue stays in one ring-type of formation on interior rotatory drum wall, and rotary drum does height in the driving of main motor While speed rotation, Oil pump electrical machinery driving hydraulic drive systems force pusher disk makees horizontal direction together with cloth tray, interior rotary drum Back and forth movement, in interior rotary drum return, solid filter residue will promote a segment distance forward, and in interior rotary drum outbound, the band vacated is small The inwall in hole forms new filter cake layer again, by the motion repeatedly of interior rotary drum, and solid filter residue is pulled to outer drum, and in outer drum Further dried under being rotated by the driving of main motor, be finally pulled to the material collecting tank of two-stage material-pushing centrifuge.

The beneficial effects of the utility model are：

1st, the two-stage material-pushing centrifuge that traditional relay is controlled is changed to be controlled to replace with PLC, while saving frequency converter, saved About cost, using star triangle start, can equally reach that starting current is small, and prevent from starting current excessive causing power network rushes Hit.

2nd, it can effectively slow down and bring too strong machine vibration because charging is uneven.

Brief description of the drawings

Fig. 1 is existing relay control mode schematic diagram；

Fig. 2 is the utility model device circuit schematic diagram；

Fig. 3 is the utility model method flow schematic diagram；

Fig. 4 is the circuit diagram of two-stage material-pushing centrifuge；

Fig. 5 is the structural representation of two-stage material-pushing centrifuge；

Fig. 6 is the utility model method automatic running program schematic diagram；

Fig. 7 is the manual operation program schematic diagram of the utility model method；

Fig. 8 is the manual/auto option program schematic diagram of the utility model method.

Embodiment

Below with reference to accompanying drawing, the utility model will be further described, it is necessary to which explanation, the present embodiment is with this skill Premised on art scheme, detailed embodiment and specific operating process are given, but protection domain of the present utility model is not It is limited to the present embodiment.

As shown in Figure 4, Figure 5, two-stage material-pushing centrifuge mainly includes expects pipe 1, outer drum 4, interior rotary drum 3, hydraulic drive system System 9, pusher disk 10, cloth tray 2, main motor (not showing in Fig. 5), Oil pump electrical machinery (not showing in Fig. 5) and charging magnetic valve are (in Fig. 5 Do not show), the outer drum 4 and interior rotary drum 3 from setting gradually and being interconnected outside inside, and the pusher disk 10 is located at described interior turn It is connected in drum 3 and with the hydraulic drive system 9；The expects pipe 1 is connected with the cloth tray 2, the cloth tray 2 and pushes away Charging tray 10 is connected；The outer drum 4 is connected with interior rotary drum 3 and pusher disk 10, and is connected with main motor；The Oil pump electrical machinery leads to Cross oil piping system and be connected to the hydraulic drive system 9；The charging magnetic valve is connected to the mouth of pipe of the expects pipe 1.

Further, in the present embodiment, two-stage material-pushing centrifuge also includes liquid outlet 6 and solids outlet port 7, and it is provided with material collecting tank 5 and sluicing pipe 8.

In the present embodiment, the operation principle of the two-stage material-pushing centrifuge is mainly：

Expects pipe 1 is continuously entered in cloth tray, after main motor starts, and main motor drive shaft is rotated, in centrifugal force field In the presence of, material (suspension liquid) is circumferentially equably thrown on the inwall of interior rotary drum.On the inwall of inside and outside rotary drum Filter bores are provided with, the rotary drum bottom of outer drum couples with main shaft, and coupled with interior rotary drum, pusher disk, rotated together with main shaft.Push away Charging tray is axially and radially keeping fixing with outer drum.The rotary drum bottom of interior rotary drum couples with the pushing piston of hydraulic drive system, It is connected again with outer drum, both gyration was acted as with outer drum one, while again reciprocating with pushing piston.When pusher is lived When plug makees drawback movement, pusher disk is sent to the solid filter residue in interior rotary drum in outer drum；When pushing piston makees process motion, Interior rotary drum doubles as the pusher disk of outer drum, and the filter residue of outer drum is discharged.Go round and begin again, complete continuous cloth, separation dry, The processes such as discharging.Material collecting tank is located at centrifuge outer drum end, and is fixed on casing, the blow tank in the outlet and casing of groove Communicate.Finished product is released rotary drum by pusher disk, into material collecting tank, and be fixed on the scraper on outer drum by the finished product in material collecting tank by Tangential direction is discharged outside machine by force.Main motor drags revolving body main shaft by belt and rotated, the reciprocating motion of interior rotary drum be then by Hydraulic system drives.Oil pump electrical machinery connects pusher hydraulic system by oil piping system.

As shown in Figure 2,3, the two-stage material-pushing centrifuge control device based on PID includes PLC microprocessors, described PLC microprocessors are connected to the main motor, Oil pump electrical machinery and charging magnetic valve of the two-stage material-pushing centrifuge；In addition, the PLC Microprocessor is also associated with vibrating sensor and flow sensor, and the vibrating sensor is arranged on machinery bed and flow is passed Sensor is connected to PID controller in the expects pipe of the two-stage material-pushing centrifuge；The PID controller is also attached to The PLC microprocessors.

Further, the PLC microprocessors are also attached to warning circuit.

Further, the PLC microprocessors are also associated with device start button, manual mode selection key, automatic mold Formula selection key, manually charging button, mair motor start button and Oil pump electrical machinery start button.Device start button is used to start Whole control device, manual mode selection key, automatic mode selection key are then used to select the manual of two-stage material-pushing centrifuge Or automatic control mode, feed button manually, the effect of mair motor start button and Oil pump electrical machinery start button is in selection Start during MANUAL CONTROL mode, it is necessary to press charging button, mair motor start button and Oil pump electrical machinery manually to PLC microprocessors Device send signal, PLC microprocessors receive signal to magnetic valve, main motor and Oil pump electrical machinery send signal with control magnetic valve, Main motor and Oil pump electrical machinery are opened only or closed.

The method that the above-mentioned two-stage material-pushing centrifuge control device based on PID carries out two-stage material-pushing centrifuge control, including Following steps：

The present embodiment will be described in further detail below.

As shown in figure 4, the main circuit of two-stage material-pushing centrifuge, mainly by main motor, Oil pump electrical machinery, voltmeter, ammeter, Electrothermal relay and contactor composition.Main motor M1 provide centrifugal power, Oil pump electrical machinery M2 be mechanical part provide lubrication with As pusher power, the pushing piston back and forth movement of hydraulic drive system is promoted, the solid filter residue isolated in interior rotary drum is pushed away To material collecting tank, discharged through solids outlet port.FR1, FR2 are electrothermal relay, mainly prevent motor overload, during motor overload, heat after Electrical equipment disconnects automatically, prevents from burning out motor, plays a part of protecting motor, QF is breaker, when circuital current is excessive or circuit It is automatic to disconnect when short-circuit, protect electric elements.PA1 and PA2 is ammeter, and for showing the size of current of motor work, PV is Voltmeter, display circuit voltage swing, KM1, KM2, KM3, KM4 is contactor main contacts.

As shown in Fig. 2 the input of PLC microprocessors has manual/auto mode selection button, starting key, oil pump fortune Row, oil pump stop and oil pump fault (oil pump output end), main frame operation and hostdown (host output end), vibration alarming (connect Connect vibrating sensor).The intensity for acting as vibrating during detection machine run of vibrating sensor, when oscillation intensity is beyond default peace During gamut, PLC sends alarm signal, while stopping machine operation, too strong vibration can damage machine part, or even cause peace Full accident.Operation principle is the current signal that sensor changes into the vibration signal of detection through converter 4-20Ma, simulation letter Number changing into corresponding data signal through A/D is sent to PLC, through PLC internal logic computing output control vibration alarming circuits and motor Stalling.Temperature alarming (connection oil temperature sensor) and ann reset.Output signal has oil pump operation, host-initiated, main frame fortune Capable, all kinds of indicator lamps, alarm etc..Switch power module is that PLC microprocessors and each sensor provide power supply.

The oil temperature sensor main function is the temperature of detection hydraulic oil, and oil temperature sensor is by the value of detection through converter PLC input ports are passed to, are compared with default value, when oil temperature sensor detects hydraulic oil temperature beyond safe range, PLC microprocessors send alarm signal, drive warning circuit, while each part of PLC micro-processor control devices stops, device Autostop.The pushing piston of hydraulic drive system does horizontal back and forth movement so that hydraulic fluid temperature in the presence of hydraulic oil Rise, and high temperature easily makes oily premature aging and it is ineffective, What is more, when temperature reach oil ignition point when, fire will be caused Calamity, when oil temperature is too low, can cause pusher number of times to reduce, cause load excessive and Main motor current excessive.

The effect of ann reset is that after PLC is by warning circuit output alarm signal Oil pump electrical machinery and main motor will It is out of service, while warning light is bright, as shown in fig. 6, after output alarm signal, intermediate coil M1.0 is connected with M1.1, Q1.1 exports high level, drives alarm.The normally-closed contact M1.1 being now connected with Oil pump electrical machinery obtains electrically disconnected (such as Fig. 8 institutes Show), Oil pump electrical machinery output contact Q0.1 is disconnected, and after Oil pump electrical machinery stops, main motor will be automatically stopped.Now normally-closed contact M1.1 State with normally-closed contact M1.0 is disconnection.No matter oily start button or host-initiated ammonium button are pressed all by because of M1.1 disconnection And be stopped.I1.0 is hand-reset alarm signal, only when pressing I1.0, and intermediate coil M0.2 is connected, normally-closed contact M0.2 is disconnected, coil M1.0 and M1.1 dead electricity, Q1.1 dead electricity, and normally-closed contact M1.1 restores with M1.0 to be connected, alarm release.

As shown in Fig. 2 the circuit hardware of the utility model device include PLC, Switching Power Supply, flow sensor, Oil temperature sensor, vibrating sensor, contactor and each indicator lamp etc..

The course of work is presses circuit general switch QF (as shown in Figure 1), and PLC is powered by L wires and N wires, opened simultaneously Power on is closed, output 24V DC voltages are that PLC input points and relay coil are powered, and are pressed after start SA1, PLC starts certainly Inspection, while power supply indicator is lighted, selects manual/auto SA2 buttons, is defaulted as automatic running, is manual if SA2 is pressed Operation.During automatic running, press after pump start button SB2, KM1 coils obtain electric, contactor KM1 normally opened contacts connect (such as Fig. 4 It is shown), Oil pump electrical machinery operation, while oil pump indicator lamp is bright, after waiting three minutes, KM2 coils obtain electric, and main motor carries out star and opened Dynamic, while main motor start indicator lamp is bright, after 15s, KM4 coils obtain electric, and main motor is run into triangle, while main frame operation refers to Show that lamp is bright, host-initiated indicator lamp goes out, while KM5 coils obtain electric, inlet valve is opened, and starts charging.Feed, wash, dry, unload Material be main frame at full speed similarly hereinafter when run, without interruption.Press after main frame stop button SB3, KM4 coil losing electricities, main frame stops Operation, goes out, after three minutes, KM1 coil losing electricities, Oil pump electrical machinery is out of service with main frame run indicator is entered, while oil pump is indicated Lamp goes out.When manual operation, then need to be manually pressed by main frame operation button SB4, main frame just brings into operation, without being to wait for oil pump Motor operation automatic start after three minutes, after end-of-job, needs also exist for being manually pressed by main frame stop button SB3 and oil pump stops Only button SB1.FR1, FR2 are electrothermal relay, when Oil pump electrical machinery or excessive Main motor current, automatic to disconnect, and play protection Effect, while alarm sends sound.It is manually pressed by after ann reset button SB5, alarm release.With should vibrating sensor and The value detected is constantly sent in PLC and contrasted with default value by oil temperature sensor, if beyond preset value, PLC is then Output alarm signal, while output signal stops motor operation, after failure is solved, presses ann reset SB5, alarm release.

As shown in figure 3, the flow controlled is presses after start button, Oil pump electrical machinery brings into operation, and waits after three minutes points, The automatic star reduced-voltage starting of main motor, after 15 seconds, main motor power frequency full speed running, at the same feed electromagnetic valve open, start into The current value that the signal read switchs to 4-20ma is sent in PID and preset value progress pair by material, flow sensor by A/D conversions Than then by the aperture of PLC control valves, to control the equilibrium of suspension liquid flow.Suspension is distributed to cloth through feed pipe On disk, due to centrifugal action, suspension is thrown to on foraminate interior rotary drum, and liquid flows out from aperture, and solid filter residue is stayed A ring-type is formed on interior rotatory drum wall, interior rotary drum does level side while rotation at a high speed is done under pull bar pusher To back and forth movement, in interior rotary drum return, filter cake layer will promote a segment distance forward, in interior rotary drum outbound, the net vacated Face forms new filter cake layer again, and by the motion repeatedly of interior rotary drum, filter residue is pulled to outer drum and further dried, is finally pulled to Material collecting tank.

After automatic mode selection key is pressed, i.e. selection automatically selects pattern, then after device start button is pressed, with All flows afterwards are carried out automatically.

After manual mode selection key is pressed, that is, manual mode is selected, then the startup of device, the startup of main motor and stopped Only, Oil pump electrical machinery startup and stopping, feed magnetic valve opening and closing be required for by be manually pressed by host-initiated button, Oil pump electrical machinery start button and manual charging button are controlled.

There is the utility model device control two-stage material-pushing centrifuge to be washed, taken off while continuous feed under full speed The processes such as water drying, discharging.Some necessary safety measures are employed in programming：Mainly there is main motor overload overheat to protect Shield, during startup, it is necessary to first start Oil pump electrical machinery and operate 3 minutes, if Oil pump electrical machinery is not actuated or startup optimization has not timed out, Main motor can not startup optimization, during shutdown, only main motor is after 3 minutes out of service, and Oil pump electrical machinery could stop, and work as main motor Under operation, when pressing Oil pump electrical machinery X button, Oil pump electrical machinery is still operated.When Oil pump electrical machinery is surprisingly out of order stopping Afterwards, main motor is also out of service immediately.So in order to protect main motor, extend main motor service life.Because not lubricating Main motor is run in the case of oil, the abrasion of main motor can be accelerated.

In the present embodiment, PLC microprocessors use siemens PLC CPU224XP, and it comes with 14 inputs and connect Mouthful, 10 output interfaces, while also two-way simulation input and all the way simulation output, address distribution are as shown in table 1, in this table altogether There are 10 input points, 11 output points, unnecessary I/O mouths can be used for extending other functions later.

Table 1

Input point

Output point

Title

Code name

Input point is numbered

Title

Code name

Output point is numbered

Power on circuitry

SA1

I0.0

Power supply indicator

HL1

Q0.0

Pump start

SB2

I0.1

Oil pump is run

KM1

Q0.1

Host-initiated

SB4

I0.2

Oil pump run indicator

HL2

Q0.2

Main frame stops

SB3

I0.3

Main frame is powered

KM3

Q0.3

Oil pump stops

SB1

I0.4

Main frame Y shape starts

KM2

Q0.4

Oil pump electrothermal relay

FR1

I0.5

Main frame Y shape run indicator

KM4

Q0.5

Main frame electrothermal relay

FR2

I0.6

Main frame triangle is run

HL3

Q0.6

It is manual/auto

SA2

I0.7

Main frame triangle run indicator

HL4

Q0.7

Ann reset

SB5

I1.0

Manual run indicator

HL5

Q1.0

Charging manually

SB6

I1.1

Warning output

HA

Q1.1

Charging

KM5

Q1.2

PLC ladder diagrams

The functional block that ladder diagram is represented by contact, coil and with square frame is constituted, contact represent logic input condition (in figure by Two vertical lines are represented in the middle of normally opened contact, two vertical lines plus an oblique line represents normally-closed contact), coil represents logic output result (in figure Represented by round bracket), functional block is used for representing the extra-instructions such as timer, counter.The execution of program is scan round mode, From left to right, the mode of top to bottm performs user program.

Program description：Fig. 6 is automatic running program, and I0.0 to I1.1 represents input contact, and wherein I0.5 and I0.6 are heat Relay contact, when main motor and Oil pump electrical machinery electric current it is excessive or overload when, I0.5 and I0.6 contacts disconnect automatically, protect motor It is not burned out.Q0.0 to Q1.2 represents output result.M0.1 represents pilot process result.T37 to T39 is 100ms timer, Delayed startup and delay for controlled motor stop, the main protective effect of Q1.1 normally-closed contacts, when alarm is not released, main electricity Machine will not start, and Q0.1 normally opened contact is protection main motor, when Oil pump electrical machinery is out of order it is out of service when, main motor also stops Operation.

Program operation process explanation：Known according to input and output allocation table above, I0.0 represents control circuit general switch, (other addresses can be inquired according in allocation table) connects I0.0, and Q0.0 output high level, power supply indicator (Q0.0) is bright, shows Control circuit is powered normally.Press after pump start button I0.1, Q0.1 and Q0.2 output high level, Oil pump electrical machinery start, together When Oil pump electrical machinery relay indicating light it is bright, timer T37 starts timing.After 3 minutes, timing is arrived, and the normally opened of T37 timers touches Point is connected, Q0.4 and Q0.5 output high level, and main frame star starts, while timer T38 starts after timing, 15S, T38 timings Time arrives, and T38 normally-closed contact disconnects, Q0.4 and Q0.5 output low levels, star start completion, while indicator lamp goes out, Q0.4 Normally-closed contact reset closure, Q0.6 and Q0.7 obtain electricity output high level, and main motor enters triangle operational mode, while triangle is transported Row indicator lamp is lighted, and now KM5 coils obtain electric, and charging magnetic valve is opened, and starts charging.When work is completed, stop button is pressed I0.3, M0.1 coil export high level, and M0.1 normally-closed contacts disconnect, Q0.3, Q0.6 and Q0.7 power-off output low level, main motor It is out of service.Indicator lamp goes out.MO0.1 normally opened contacts are closed, while timer T39 starts timing, after 3 minutes, T39 timings Arrive, T39 normally-closed contacts disconnect, Q0.1 and Q0.2 dead electricity output low level, Oil pump electrical machinery is out of service.When next time starts, press After I0.1 pump starts, start automatic running.

Fig. 7 is manual operation program, and program operation process and automatic running process are essentially identical, and difference is needs manually Press each load button.When pressing pump start button I0.1, timing to rear, it is necessary to press host-initiated button I0.2, Main frame could start, after end-of-job, and the stopping of Oil pump electrical machinery needs to be manually pressed by I0.4.

Fig. 8 is alert program and manual/auto option program, and I0.7 is the contact of manual automatic selector switch, when not connecing It is automatic running when logical, is manual operation when on.JMP instructs for programming jump, and LBL is to redirect label, and JMP paired Accordingly.When JMP is effective, the program in the middle of JMP and LBL is skipped, the program after LBL is performed.When event occurs in Centrifugal Machine Control During barrier, press after I0.7, carry out manual commissioning test.When main frame and the too high excessive temperature of Oil pump electrical machinery electric current, I0.6 and I0.5 is connected, and intermediate coil M1.0 is connected with M1.1, so that Q1.1 exports high level, drives alarm.I1.0 is hand-reset Alarm signal, when pressing I1.0, M0.2 is connected, and its normally-closed contact disconnects, M1.0 and M1.1 coil losing electricities, Q1.1 dead electricity, report It is alert to release.After alarming, only release after alarm, main motor could start.

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For those skilled in the art, technical scheme that can be more than and design, make various corresponding Change and deform, and all these change and deformation should be construed as being included in the utility model scope of the claims it It is interior.

Claims

1. a kind of two-stage material-pushing centrifuge control device based on PID, two-stage material-pushing centrifuge include expects pipe, outer drum, interior turn Drum, hydraulic drive system, pusher disk, cloth tray, main motor, Oil pump electrical machinery and charging magnetic valve, the outer drum and interior rotary drum From setting gradually and being interconnected inside outside, the pusher disk is connected in the interior rotary drum and with the hydraulic drive system Connect；The expects pipe is connected with the cloth tray, and the cloth tray is connected to the pusher disk；The outer drum and interior rotary drum and Pusher disk is connected, and is connected with main motor；The Oil pump electrical machinery is connected to the hydraulic drive system by oil piping system；Institute State the mouth of pipe that charging magnetic valve is connected to the expects pipe；Characterized in that, the two-stage material-pushing centrifuge control dress based on PID Put including PLC microprocessors, the PLC microprocessors be connected to the main motor of the two-stage material-pushing centrifuge, Oil pump electrical machinery and Feed magnetic valve；In addition, the PLC microprocessors are also associated with vibrating sensor and flow sensor, the vibrating sensor It is located on machinery bed with flow sensor in the expects pipe of the two-stage material-pushing centrifuge, and is connected to PID control Device；The PID controller is also attached to the PLC microprocessors.

2. the two-stage material-pushing centrifuge control device according to claim 1 based on PID, it is characterised in that the PLC is micro- Processor is also attached to oil temperature sensor, and is connected with temperature alarm circuit.

3. the two-stage material-pushing centrifuge control device according to claim 1 based on PID, it is characterised in that the PLC is micro- Processor is also attached to warning circuit.

4. the two-stage material-pushing centrifuge control device according to claim 1 based on PID, it is characterised in that the PLC is micro- Processor is also associated with device start button, manual mode selection key, manually automatic mode selection key, charging button, master Electric motor starting button and Oil pump electrical machinery start button.