CN2444996Y

CN2444996Y - Intelligent constant-pressure water supply equipment control device

Info

Publication number: CN2444996Y
Application number: CN 00247435
Authority: CN
Inventors: 杨森; 徐爱菊
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-28
Filing date: 2000-08-28
Publication date: 2001-08-29
Anticipated expiration: 2010-08-28

Abstract

The utility model provides a control device of an intelligent constant-pressure water supply device. A calculus adjustor PID (2) is connected with a programmable controller PLC (4) and a frequency converter BP (3), a contactor group (6) is respectively connected with the frequency converter BP and the programmable controller PLC, and the programmable controller PLC is also connected with a pressure gauge P (11) with an electric contact, a water level switch SK (10), etc. When the next motor is started, a motor of the control device is accelerated smoothly, and the impact of a starting current and the impact of starting water hammer are avoided. The position of each water pump is equal, so the attrition degree has no obvious difference, and the water pump is suitable for centralized maintenance. The manpower and the money are saved.

Description

Intelligent constant voltage supply equipment control device

The utility model provides a kind of electrical control gear of constant pressure water supply equipment.

Needing the occasion of constant pressure water supply, the control device that control by the pump group motor that many water pumps are formed.Present control device is that the frequency converter of operation is directly switched to another pump from a water pump in the course of the work, can not guarantee that each pump startup frequency is zero.It is higher to start frequency during switching, and starting current and startup water hammer are bigger.Every pump status inequality, degree of wear difference is obvious, unsuitable centralized maintenance.Water pump (as power off time length, Chi Gan etc.) for some reason enters air and can not recover normal use automatically after ineffective, needs artificial pump priming.Damage as relevant A.C. contactor, auxiliary reclay, can cause pump motor directly to start, startup dash current and water hammer are increased significantly, when power of motor is big, also may further enlarge fault coverage without frequency conversion.After the dc source that provides pressure signal to use damaged, system can so that all water pumps are put into operation at full speed, cause system pipeline super-pressure because of there not being signal to think that hydraulic pressure is too low, might enlarge fault coverage.Do not have the phase shortage protection during motor power frequency operation, burn motor because of the power supply phase shortage sometimes.

The purpose of this utility model provides a kind of intelligent constant voltage supply equipment control device, to improve its control and protective value.

The utility model is to realize like this, intelligent constant voltage supply equipment control device, it has calculus adjuster PID to link to each other with the teletransmission pressure meter, the FM signal that calculus adjuster PID produces is delivered on the frequency converter B P, on the pressure that calculus adjuster PID produces, following limited signal is connected on the programmable controller PLC, the switching signal that programmable controller PLC produces is received on the contactor group, the feedback signal that the contactor group produces is connected on the programmable controller PLC, the upper limit and following limited signal on the pressure that electro connecting pressure gauge P produces, the water level signal that water level switch SK produces, auxiliary reclay Zbp detection signal and dc source detection signal are connected on the programmable controller, the alarm signal that programmable controller produces is connected on the alarm, and the contactor group also is connected between frequency converter B P and the pump motor group.

This intelligent constant voltage supply equipment control device has following advantage:

1, by programme-control, a period of time out of service (3 second) before frequency converter starts next pump motor that needs to start, make its output frequency when starting next motor guarantee to begin to rise from 0HZ, motor is steadily quickened, avoided starting current to impact and the startup impact of water hammer.

2, every water pump is equal, and the degree of wear does not have significant difference, and suitable centralized maintenance is saved manpower and resource.

3, water pump for some reason (as power off time length, Chi Gan etc.) enter air and can recover normal use automatically after ineffective, do not need manual intervention.

4, damage as relevant A.C. contactor, auxiliary reclay, this device can predict, and can not cause motor directly to start without frequency conversion, has avoided startup dash current and water hammer to increase significantly.

5, after the dc source that provides pressure signal to use damaged, program can be carried out immediately by the platform shutdown operation, can not cause system pipeline super-pressure.

6, motor has open-phase protection for a long time, can not burn motor because of the power supply phase shortage.

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is a circuit block diagram of the present utility model.Fig. 2 is the electrical schematic diagram of its main circuit.Fig. 3, Fig. 4, Fig. 5 are the electrical schematic diagrams of its control circuit.

As shown in drawings, the intelligent constant voltage supply equipment control device of the utility model, it has calculus adjuster PID (2) to link to each other with teletransmission pressure meter (1), the FM signal that the calculus adjuster produces is delivered on the frequency converter B P (3), on the pressure that calculus adjuster PID produces, following limited signal is connected on the programmable controller PLC (4), the switching signal that programmable controller PLC produces is received on the contactor group (5), the feedback signal that the contactor group produces is connected on the programmable controller PLC, the upper limit and following limited signal on the pressure that electro connecting pressure gauge P (11) produces, the water level signal that water level switch SK (10) produces, auxiliary reclay Zbp (10) detection signal and dc source DY (8) detection signal are connected on the programmable controller PLC, the alarm signal that programmable controller PLC produces is connected on the alarm (7), and the contactor group also is connected between frequency converter B P and the pump motor group (6).

As shown in drawings, 1 of described frequency converter B P (3), 2,3 terminate on the air switch 4ZD, 4,5,6 terminate at A.C. contactor main contacts 1C ', 2C ', on the end of 3C ', 7,8 terminate at 7 of calculus adjuster PID, 6 ends, 1C ', 2C ', the other end of 3C ' is connected on A.C. contactor

main contacts

1C, 2C, the output of 3C and thermal relay main contact 1R, 2R, between the input of 3R, motor 1M on the pump motor group (6), 2M, 3M is connected on thermal relay main contact 1R respectively, 2R, on the output of 3R, A.C. contactor

main contacts

1C, 2C, the input of 3C is connected on air switch 1DZ, 2DZ, on the 3DZ, air switch 1DZ, 2DZ, 3DZ, 4DZ, 5DZ is connected on the AC power, and self priming pump motor M z is connected between the input of 3DZ and A.C. contactor main contacts 3C through A.C. contactor main contacts Cg.

As shown in drawings, on the described calculus adjuster PID (2), 1,2 pin link to each other mutually with zero-power line N, power supply b respectively, 3,5 pin link to each other with L+ pin, the I12 pin of programmable controller PLC respectively, its 4 pin links to each other with the I11 pin of programmable controller PLC through auxiliary reclay constant close contact Z2,6,7 pin link to each other with 8,7 ends of frequency converter B P respectively, 9,8 pin link to each other with 2,3 ends of teletransmission pressure meter Y (1), manometric 1,3 ends of teletransmission be connected on respectively dc source DY (8)+5V output and G end on.

As shown in drawings, on described programmable controller PLC (4), its I10 pin links to each other with the end of manual soft guard's valve 2NK and water level switch SK, the other end of 2NK and SK is connected between the L+ pin of 3 pin of PID and PLC, the 2M pin of PLC, the M pin connects together, the I00 of PLC, I02, I04, I01, I03, the I05 pin is often opened auxilliary some 1C ' 1 with A.C. contactor respectively, 2C ' 1,3C ' 1,1C1,2C1, the end of 3C1 links to each other, 1C ' 1,2C ' 1,3C ' 1,1C1,2C1, the other end of 3C1 is connected on dc source DY's+the 24V output on, the I06 pin of PLC is connected on 2 pin of electro connecting pressure gauge P through switch 1NK, the I07 pin is connected on 3 pin of P, the I13 pin through auxiliary reclay constant close contact Zbp3 be connected on dc source DY+the 24V output on, I14 terminates at dc source DY's+the 24V output on, the 1M pin connects the G end of dc source DY, the 1L of PLC, 2L, the 3L pin connects together on the N pin that is attempted by PLC, its Q05, Q03, the Q01 pin is connected on auxiliary reclay constant close contact 3Z ' 2 respectively, 2Z ' 2, on the 1Z ' 2, its Q04, Q02, the Q00 pin is connected on auxiliary reclay constant close contact 3Z2 respectively, 22, on 1Z2 one end, 3Z2,2Z2, the 1Z2 other end is respectively through ac contactor coil 3Z ', 2Z ', 1Z ' is connected on power supply b and goes up mutually, its Q06 pin is connected on ac contactor coil Cg one end, its Q10 pin is connected on auxiliary reclay coil Zbp one end, Cg, the b that the Zbp other end is connected on power supply goes up mutually, and the Q11 pin is connected between indicator lamp YD and the thermal relay normally closed contact 1R1.

As shown in Figure 4, connect with indicator lamp YD after thermal relay constant open contact 1R1,2R1,3R1, the auxiliary reclay constant open contact Z1 parallel connection, be connected between power supply b phase and the zero line N, electric bell DL, silence switch 3NK series connection back one termination power b phase, the other end is connected between YD, the 1R1, and the Q11 of PLC is connected between YD, the 1R1.This has constituted alarm of the present utility model (7).

Be connected on power supply b after auxiliary reclay constant open contact 1Z ' 3, indicator lamp 1GD series connection back, 2Z ' 3,2GD series connection back, 3Z ' 3, the 3GD series connection mutually and between the zero-power line N, constituted the motor frequency conversion indicating circuit.Be connected between power supply b phase and the zero-power line N after auxiliary reclay constant open contact 1Z1, indicator lamp 1RD series connection back, 2Z1,2RD series connection back, 3Z1, the 3RD series connection, constituted motor power frequency indicating circuit.Indicator lamp RD is connected between power supply b phase and the zero-power line N, carries out the power supply indication.

As shown in Figure 3, be connected on auxiliary reclay constant close contact 1Z ' 2 and auxiliary reclay coil 1Z, thermal relay normally closed contact 1R2 series connection back on the Q01 pin of PLC, be connected on 2Z ' 2 on the PLCQ03 pin connect with 2Z, 2R2 back, be connected on the PLCQ05 pin 3Z ' 2 be connected on power supply b after 3Z, 3R2 connect and go up mutually.

As shown in Figure 5, auxiliary reclay constant open contact 1Z3, the normally closed auxilliary some 1C ' 2 of thermal relay, ac contactor coil 1C are connected on power supply a phase after being cascaded, c goes up mutually.Be connected on power supply a phase after 2Z3,2C ' 2,2C are cascaded, c goes up mutually.Be connected on power supply a phase after 3Z3,3C ' 2,3C are cascaded, c goes up mutually.Auxiliary reclay constant open contact 1Z ' 1, the normally closed auxilliary some 1C2 of thermal relay, ac contactor coil 1C ' are connected on power supply a phase after being cascaded, c goes up mutually.Be connected on power supply a phase after 2Z ' 1,2C2,2C ' are cascaded, c goes up mutually.Be connected on power supply a phase after 3Z ' 1,3C2,3C ' are cascaded, c goes up mutually.

As shown in Figure 3,4. pin, the other end of stop button 1TA, start button 1QA series connection back one termination changeover switch KK are connected between auxiliary reclay constant close contact 1Z ' 2, the auxiliary reclay coil 1Z, and auxiliary reclay constant open contact 1Z1 is connected across the 1QA two ends; 4. pin, the other end of stop button GTA, start button GQA series connection back one termination changeover switch KK are connected between PLCQ06 pin, the ac contactor coil 1Z, and A.C. contactor often leaves auxilliary some Cg1 and is connected across the 1QA two ends; 4. pin, the other end of stop button 2TA, start button 2QA series connection back one termination changeover switch KK are connected between auxiliary reclay constant close contact 2Z ' 2, the auxiliary reclay coil 2Z, and auxiliary reclay constant open contact 2Z1 is connected across the 2QA two ends; 4. pin, the other end of stop button 3TA, start button 3QA series connection back one termination changeover switch KK are connected between auxiliary reclay constant close contact 3Z ' 2, the auxiliary reclay coil 3Z, and auxiliary reclay constant open contact 3Z1 is connected across the 3QA two ends.This has constituted manual control and manual pump priming circuit.

Pump motor group (6) is made up of No. 1 pump motor 1M, No. 2 pump motor 2M, No. 3 pump motor 3M.

Have induction coil 1LH, 2LH, 3LH to link to each other with ammeter respectively on the line between

motor

1M, 2M, 3M and thermal relay main contact 1R, 2R, the 3R, the electric current that is used for each motor shows.

Calculus adjuster PID adopts the FUJI board, and model is PXW-900.Can certainly adopt the calculus adjuster that meets instructions for use of other brands, model.Programmable controller is produced by Siemens Company, and model is simatic ST-200 series 6ES7212 (214)-1BA01-0XB0.Can certainly adopt the enough programmable controllers of input and output interfaces of other brands, model.

Operating principle of the present utility model below is described.

Water level switch SK (10) connects when the lack of water of pond automatically, and water level in water pool just often disconnects.

Teletransmission pressure meter Y (1) converts pressure signal to 9,8 pin that 1～5V signal of telecommunication is input to calculus adjuster PID.

PID can show actual pressure and setting pressure simultaneously, and the signal of an actual pressure and a 4～20mA of the relatively back output of setting pressure, this signal is input to 7,8 terminals of frequency converter B P, control the output frequency of frequency converter B P, when actual pressure is lower than setting pressure, the output frequency of frequency converter is promoted, otherwise descend; Simultaneously, PID can also setting pressure on/lower limit numerical value, carry out on the pressure/the signal output of lower limit.When pressure is higher than terminal 3,5 connections in limited time; Prescribe a time limit when pressure is lower than down, terminal 3,4 is connected.On the pressure/following limited signal passes to input terminal I11 and the I12 of PLC.

Frequency converter B P7,8 ends are the input of frequency control signal, and 9,10 ends are that the opening of frequency converter/letter stops control terminal, i.e. frequency converter start when 9,10 connect, and frequency converter is shut down when 9,10 disconnect; 11,12 ends are the alarm relay of frequency converter, and 11,12 connect when frequency converter is reported to the police.Terminal 1,2,3 is the main power source input, and terminal 4,5,6 is main power source output.

On electro connecting pressure gauge P, when being lower than set following, hydraulic pressure pressure prescribes a time limit, and 1,2 terminations are logical; 1,3 terminations are logical in limited time when hydraulic pressure pressure is higher than going up of setting.The setting of this table lower limit is well below the lower limit set of PID, as long as a little more than 0 just passable, this value is the lower limit in the program, and expression should be carried out pump priming and operate; The higher limit of this table is set greater than the upper limit of PID and is set, and this value is the upper limit in the program, if hydraulic pressure pressure is raised to this value, the expression system has been out of order.

On PLC, I00～I07, I10～I15 are input, and 1M, 2M are the input common port; Q000～Q07 is a lead-out terminal, and 1～3L is the output common port; L+ is the positive pole that PLC externally provides 24VDC, and M is the negative pole that PLC externally provides 24VDC; N, L are the input of 220VAC working power.

The effect such as the following table of each pin of the input of PLC (L end):

Each pin code name	The PLC input signal	The signal source	The signal purposes
Each pin code name	The PLC input signal	The signal source	The signal purposes	I11	The low pressure limit signal	Calculus adjuster PID	Expression should be started shooting or delay time and be added pump
I12	The upper pressure limit signal	Calculus adjuster PID	Expression should be delayed time and be subtracted pump until shutdown	I11	The low pressure limit signal	Calculus adjuster PID
I12	The upper pressure limit signal	Calculus adjuster PID		I10	Anhydrous or " manual	Water level switch SK or artificial	Subtract pump until shutdown by the platform time-delay
I06	Anhydrous or manual soft stopping	Electro connecting pressure gauge P	The air inlet of the expression pump housing was lost efficacy, and answered pump priming	I10	Anhydrous or " manual	Water level switch SK or artificial	Subtract pump until shutdown by the platform time-delay
I06	Anhydrous or manual soft stopping	Electro connecting pressure gauge P		I07	Go up limited signal	Electro connecting pressure gauge P	The system failure should subtract pump until shutdown by platform
I13	Zbp often opens	Auxiliary reclay Zbp	Detect the state of auxiliary reclay Zbp	I07	Go up limited signal	Electro connecting pressure gauge P
I13	Zbp often opens	Auxiliary reclay Zbp	Detect the state of auxiliary reclay Zbp	I14	Dc source	Dc source DY	Whether detect dc source normal
I00				I14	Dc source	Dc source DY	Whether detect dc source normal
I00		1C ' often opens	1C′1	Detect 1M converting operation contactor state
I02		1C ' often opens	1C′1	Detect 1M converting operation contactor state
I02		2C ' often opens	2C′1	Detect 2M converting operation contactor state
I04		2C ' often opens	2C′1	Detect 2M converting operation contactor state
I04		3C ' often opens	3C′1	Detect 3M converting operation contactor state
I01		3C ' often opens	3C′1	Detect 3M converting operation contactor state
I01		1C often opens	1C1	Detect	1M power frequency operation contactor state
I03		1C often opens	1C1	Detect	1M power frequency operation contactor state
I03		2C often opens	2C1	Detect	2M power frequency operation contactor state
I05		2C often opens	2C1	Detect	2M power frequency operation contactor state	3C often opens	3C1	Detect 3M power frequency operation contactor state

The effect such as the following table of each pin of the output of PLC (Q end):

Each pin code name	The control object	The signal purposes
Each pin code name	The control object	The signal purposes	Q10	?Zbp	Connect auxiliary reclay coil Zbp, control frequency converter indirectly and begin output
Q00	?1Z′	Connect 1M converting operation A.C. contactor 1C '	Q10	?Zbp
Q00	?1Z′	Connect 1M converting operation A.C. contactor 1C '	Q02	?2Z′	Connect 2M converting operation A.C. contactor 2C '
Q04	?3Z′	Connect 3M converting operation A.C. contactor 3C '	Q02	?2Z′	Connect 2M converting operation A.C. contactor 2C '
Q04	?3Z′	Connect 3M converting operation A.C. contactor 3C '	Q01	?1Z	Connect 1M power frequency operation A.C. contactor 1C
Q03	?2Z	Connect 2M power frequency operation A.C. contactor 2C	Q01	?1Z	Connect 1M power frequency operation A.C. contactor 1C
Q03	?2Z	Connect 2M power frequency operation A.C. contactor 2C	Q05	?3Z	Connect 3M power frequency operation A.C. contactor 3C
Q06	?Cg	Connect pump priming self priming pump A.C. contactor Cg	Q05	?3Z	Connect 3M power frequency operation A.C. contactor 3C

State before the start is: air switch 1～5DZ connects, and changeover switch KK is middle (the full disconnection), and switch 1NK, silence switch 3NK connect, manual soft guard's valve 2NK disconnects.

Changeover switch KK is forwarded to the right (automated location), 3., 4. disconnect, make hand push button ineffective, 1., 2. connect the PLC working power, control device enters automatic running status.PLC starts working, and begins to detect input signal after the program initialization, supposes all in ready state, and generally speaking, system pressure is very low before start, even is 0.If system pressure is lower than lower limit down, then the I06 pin has the signal input, and program is then connected the Q06 pin, and ac contactor coil Cg is connected, and promptly b → Cg → Q06 → 2L → N opens self priming pump and comes feed pump to pour water.After in case pressure is higher than following lower limit, the blackout on the I06 pin.This moment, pressure still was lower than the low pressure limit value of PID, PID has following limited signal output, be 3 of PID, 4 terminations are logical, PLC has signal to be input to the I11 pin, program is at first connected the Q00 pin according to this signal, make auxiliary reclay coil 1Z ' connection, be b → 1Z ' → 122 → Q00 → 1L → N, after auxiliary reclay coil 1Z connected, ac contactor coil 1C ' also connected, i.e. a → 1Z ' 1 → 1C2 → 1C ' → c, A.C. contactor main contact 1C ' connects pump motor 1M and frequency converter B P, program is connected Q10 simultaneously, makes auxiliary reclay coil Zbp coil electricity, i.e. b → Zbp → Q10 → 3L → N, auxiliary reclay constant open contact Zbp1 connects 9 of frequency converter B P, 10 ends, make frequency converter start work, No. 1 pump motor 1M of variable frequency starting, promptly this moment, 1M operated in the frequency control state.Simultaneously, auxiliary reclay constant open contact Zbp3 gives signal of I13 pin of PLC, tell that program auxiliary reclay Zbp is working properly, otherwise program will be carried out troubleshooting.1Z ' 3 connects indicator lamp 1GD, indicates pump motor 1M converting operation No. 1.

After No. 1 pump motor 1M converting operation; if following limited signal (PLC is input to the signal of I11 pin) certain time (by program setting); then program is carried out handover operation: at first cut off the output of Q10 pin; make auxiliary reclay coil Zbp outage, Zbp1 disconnects 9,10 ends of frequency converter, and frequency converter is shut down; program is cut off the output of Q00 pin then; make 1Z ' outage, 1Z ' 3 resets, and indicator lamp 1GD extinguishes.The outage of 1Z ' makes ac contactor coil 1C ' outage again, makes No. 1 pump motor 1M break away from frequency converter.Then program is connected the Q01 pin again, make auxiliary reclay coil 1Z energising, be b → 1R2 → 1Z → 1Z ' 2 → Q01 → 1L → N, make ac contactor coil 1C energising, be a → 1Z3 → 1C ' 2 → 1C → c, main contacts 1C connects the power frequency supply (civil power) of No. 1 pump motor 1M, and M1 begins power frequency operation, 1Z1 connects indicator lamp 1RD simultaneously, and indication motor M1 is just at power frequency operation.After frequency converter shut down for 3 seconds, program was connected output Q02, makes auxiliary reclay coil 2Z ' energising; be b → 2Z ' → 2Z2 → Q02 → 1L → N; after the 2Z ' energising, ac contactor coil 2C ' connection, i.e. a → 2Z ' 1 → 2C2 → 2C ' → c; its main contacts is connected No. 2 pump motor 2M and frequency converter; program is connected the Q10 pin simultaneously, makes auxiliary reclay coil Zbp coil electricity, i.e. b → Zbp → Q10 → 3L → N; Zbp1 connects 9,10 ends of frequency converter B P, makes frequency converter start work.Shut down and can guarantee that output frequency promotes since 0 after the frequency converter start in 3 seconds, No. 2 pump motor 2M of frequency conversion soft start, promptly this moment, motor 2M operated in the frequency control state.Simultaneously, relay Zbp3 gives signal of I13 pin of PLC, tell that program auxiliary reclay Zbp is working properly, otherwise program will be carried out troubleshooting.2Z ' 3 connects indicator lamp 2GD, indicates pump motor 2M converting operation No. 2.

After the operation of 2M motor frequency conversion, if following limited signal (being input to the signal of PLC I11 pin) certain time (by program setting), then program is carried out handover operation once more.Handoff procedure and said process are similar, and the state after the switching is: No. 1 pump and No. 2

pump motor

1M, 2M power frequency operation, No. 3 pump motor 3M pump frequency converting speed regulating operations.

When last limited signal (being input to the signal of PLCI12 pin) certain time (by program setting), program will subtract pump operated.The principle that subtracts pump is: that opens earlier stops earlier.Subtracting pump operated method is the output of being cut off each pin of the pairing PLC output of motor of power frequency operation by program; the output of promptly cutting off the Q01 pin can make the motor 1M of power frequency operation shut down; the output of cutting off the Q03 pin can make the motor 2M of power frequency operation shut down, and the output of cutting off the Q05 pin can make the motor 3M of power frequency operation shut down.

If the pond is anhydrous, perhaps connected manual soft guard's valve 2NK, promptly program has detected signal and has been input to the I10 pin, will pursue the platform shutdown operation; At run duration, if be input to the following limited signal certain time (I10 pin no signal) of I06 pin, program can be by carrying out pump priming operation (starting self priming pump as previously mentioned) after the platform termination of pumping; After program detects limited signal and is input to the I07 pin, pursue platform and shut down and report to the police, alarm method is to connect the Q11 pin, and Q11 connects electric bell DL and indicator lamp YD, i.e. b → DL → 3NK → Q11 → 3L → N, b → YD → Q11 → 3L → N.At any time, if program detects less than there being signal to be input to the I14 pin, illustrate that dc source damages, the rely raw pressure signal of work of system can't provide, at this moment also with stopping alarm.

If frequency converter B P internal alarm, 11,12 terminations are logical, so connect alarm relay coil Z, i.e. b → BP-11 → BP-12 → Z → N.Z1 connects electric bell DL and indicator lamp YD reports to the police, i.e. b → DL → 3NK → Z1 → N, b → YD → Z1 → N.Z2 disconnects the following limited signal that is input to the I11 pin simultaneously, and it is pump operated that program can only be subtracted, and can not add the pump startup operation again.

Changeover switch KK is forwarded to the left side (manual position), 1., 2. disconnect the PLC working power; 3., 4. connect, hand push button is worked.

Carry out the manual start stop operation of 1～No. 3

pump motor

1M, 2M, 3M and self priming pump motor M z at manual state available buttons 1TA, 2TA, 3TA, GTA, 1QA, 2QA, 3QA, GQA, operating principle is very simple, no longer describes in detail.

Described contactor group (5) is made up of A.C.

contactor

1C, 2C, 3C, 1C ', 2C ', 3C ', Cg etc.

The open-phase protection principle is because ac contactor coil adopts B-C two-phase 380V power supply to come work; and the auxiliary reclay coil of connecting ac contactor coil has adopted the single-phase 220V of A-N as working power; so lacking any one all can not work mutually; both reach the purpose of open-phase protection motor, do not introduced professional component again.

More than be to be that example describes with 3 pump motors of control device control.In actual use, can control the pump motor of other quantity as required, its circuit is similar, operating principle is identical.

The electrical control gear of the utility model can be installed in the cabinet.Can establish button, changeover switch, ammeter, voltmeter, indicator lamp etc. on the cabinet panel.

Claims

1, intelligent constant voltage supply equipment control device, it is characterized in that, it has calculus adjuster PID (2) to link to each other with teletransmission pressure meter Y (1), the FM signal that the calculus adjuster produces is delivered on the frequency converter B P (3), on the pressure that calculus adjuster PID produces, following limited signal is connected on the programmable controller PLC (4), the switching signal that programmable controller PLC produces is received on the contactor group (5), the feedback signal that the contactor group produces is connected on the programmable controller PLC, the upper limit and following limited signal on the pressure that electro connecting pressure gauge P (11) produces, the water level signal that water level switch SK (10) produces, auxiliary reclay Zbp (10) detection signal and dc source DY (8) detection signal are connected on the programmable controller PLC, the alarm signal that programmable controller PLC produces is connected on the alarm (7), and the contactor group also is connected between frequency converter B P and the pump motor group (6).

2, intelligent constant voltage supply equipment control device as claimed in claim 1, it is characterized in that, 1 of described frequency converter B P (3), 2,3 terminate on the air switch 4ZD, 4,5,6 terminate at A.C. contactor main contacts IC ', 2C ', on the end of 3C ', 7,8 terminate at 7 of calculus adjuster PID, 6 ends, 1C ', 2C ', the other end of 3C ' is connected on A.C. contactor main contacts 1C, 2C, the output of 3C and thermal relay main contact 1R, 2R, between the input of 3R, motor 1M on the pump motor group (6), 2M, 3M is connected on thermal relay main contact 1R respectively, 2R, on the output of 3R, A.C. contactor main contacts 1C, 2C, the input of 3C is connected on air switch 1DZ, 2DZ, on the 3DZ, air switch 1DZ, 2DZ, 3DZ, 4DZ, 5DZ is connected on the AC power, and self priming pump motor M z is connected between the input of 3DZ and A.C. contactor main contacts 3C through A.C. contactor main contacts Cg.

3, intelligent constant voltage supply equipment control device as claimed in claim 1, it is characterized in that, on described calculus adjuster PID (2), it is 1 years old, 2 pin respectively with zero-power line N, power supply b links to each other, they are 3 years old, 5 pin respectively with the L+ pin of programmable controller PLC, the I12 pin links to each other, its 4 pin links to each other with the I11 pin of programmable controller PLC through auxiliary reclay constant close contact Z2, they are 6 years old, 7 pin respectively with 8 of frequency converter B P, 7 ends link to each other, they are 9 years old, 2 of 8 pin and teletransmission pressure meter Y (1), 3 ends link to each other, teletransmission manometric 1,3 ends are connected on dc source DY's (8) respectively+5V output and G end on.

4, intelligent constant voltage supply equipment control device as claimed in claim 1, it is characterized in that, on described programmable controller PLC (4), its I10 pin links to each other with the end of manual soft guard's valve 2NK and water level switch SK, the other end of 2NK and SK is connected between the L+ pin of 3 pin of PID and PLC, the 2M pin of PLC, the M pin connects together, the I00 of PLC, I02, I04, I01, I03, the I05 pin is often opened auxilliary some 1C ' 1 with A.C. contactor respectively, 2 ' 1,3 ' 1,1C1,2C1, the end of 3C1 links to each other, 1C ' 1,2C ' 1,3C ' 1,1C1,2C1, the other end of 3C1 is connected on dc source DY's+the 24V output on, the I06 pin of PLC is connected on 2 pin of electro connecting pressure gauge P through switch 1NK, the I07 pin is connected on 3 pin of P, the I13 pin is connected on auxiliary reclay constant close contact Zbp3 one end, the Zbp3 other end is connected on dc source DY's+the 24V output on, I14 terminates at dc source DY's+the 24V output on, the 1M pin connects the G end of dc source DY, the 1L of PLC, 2L, the 3L pin connects together on the N pin that is attempted by PLC, its Q05, Q03, the Q01 pin is connected on auxiliary reclay constant close contact 3Z ＇ 2 respectively, 2Z ＇ 2, on the 1Z ' 2, its Q04, Q02, the Q00 pin is connected on auxiliary reclay constant close contact 3Z2 respectively, 2Z2, on 1Z2 one end, 3Z2,2Z2, the 1Z2 other end is respectively through ac contactor coil 3Z ', 2Z ', 1Z ' is connected on power supply b and goes up mutually, its Q06 pin is connected on ac contactor coil Cg one end, its Q10 pin is connected on auxiliary reclay coil Zbp one end, Cg, the b that the Zbp other end is connected on power supply goes up mutually, and the Q11 pin is connected between indicator lamp YD and the thermal relay normally closed contact 1R1.