恒壓供水系統(tǒng) 全自動(dòng)恒壓供水控制原理 當(dāng)主水管網(wǎng)壓力傳感器的壓力信號(hào)4~20mA送給數(shù)字PID控制器，控制器根據(jù)壓力設(shè)定值與實(shí)際檢測(cè)值進(jìn)行PID運(yùn)算，并給出信號(hào)直接控制變頻器的轉(zhuǎn)速以使管網(wǎng)的壓力穩(wěn)定。當(dāng)用水量不是很大時(shí)，一臺(tái)泵在變頻器的控制下穩(wěn)定運(yùn)行；當(dāng)用水量大到變頻器全速運(yùn)行也不能保證管網(wǎng)的壓力穩(wěn)定時(shí)，控制器的壓力下限信號(hào)與變頻器的高速信號(hào)同時(shí)被PLC檢測(cè)到，PLC自動(dòng)將原工作在變頻狀態(tài)下的泵，投入到工頻運(yùn)行，以保持壓力的連續(xù)性，同時(shí)將一臺(tái)備用的泵用變頻器起動(dòng)后投入運(yùn)行，以加大管網(wǎng)的供水量，保證壓力穩(wěn)定。若兩臺(tái)泵運(yùn)轉(zhuǎn)仍，則依次將變頻工作狀態(tài)下的泵投入到工頻運(yùn)行，而將另一臺(tái)備用泵投入變頻運(yùn)行。當(dāng)用水量減少時(shí)，首先表現(xiàn)為變頻器已工作在最低速信號(hào)有效，這時(shí)壓力上限信號(hào)如仍出現(xiàn)，PLC首先將工頻運(yùn)行的泵停掉，以減少供水量。當(dāng)上述兩個(gè)信號(hào)仍存在時(shí)，PLC再停掉一臺(tái)工頻運(yùn)行的電機(jī)，直到最后一臺(tái)泵用主頻器恒壓供水[4]。另外，控制系統(tǒng)設(shè)兩臺(tái)泵為一組，每臺(tái)泵的電機(jī)累計(jì)運(yùn)行時(shí)間可顯示，24小時(shí)輪換一次，既保證供水系統(tǒng)有備用泵，又保證系統(tǒng)的泵有相同的運(yùn)行時(shí)間，確保了泵的可靠壽命。DURANT SYSTEMS 56450-401 HOMATIC 2-083-02-7420
FANUC A20B-8200-001/06A
GENERAL ELECTRIC IC3606SPCD1H
BURKERT 8226
BRAUN E1697-10375399
HONEYWELL RA890G1260
PMP71-SBC2PB1RDAAU
OSRAM 8545271
KEB D2F5SBE-14EC
STR AUTOMATION SYSTEMS SLZ90P
SCHUNK 342850
GENERAL ELECTRIC DS3800NEPD1D1B
FANUC A16B-1110-0260/07D
FLOWSERVE VLCYLINDER 3-15PSI
ROSEMOUNT 1151GP5S22W7B3L4
KOYO ELECTRONICS NX-G21-FP12XXGK
WELLER WFE2S
GOULD AS-B883-001
SANYO DENKI 67ZA150MXXXC04
ALLEN BRADLEY 20AD8P0A3AYNANNN
ABB DSAI-133
IKEY FP-17-PMT 17INCH
ASCO 8018A004
ALLEN BRADLEY 1336F-CWF50-AN-EN
YOKOGAWA AE204DN-AB1-LSA
GE FANUC IC660BBD025S
KB ELECTRONICS 92A61633010000
HMIG5U2
C7012A 1160
ABB 1911JAA01100600STD
DS3800NCCB1H1F
ROSS 3126A3011
6FC5203-0AB11-0AA2, 6FC5210-0DA20-2AA1
A06B-6055-H118 #H508
FRN030VG3-2
FCA710PY-11
NSB-24
fr-se-2-3.7k-f
a06b-0153-b176 #7000
a06b-6044-h032, a20b-0009-0530/24j
801429-5SC
303j Typ B, Mod # d11-b
A06B-0871-B900 #0391
CIMR-vms2750
a06b-0590-b001 # 7008
m237-h60a-300y
A06B-0753-B394 #3000
mds-dh2-sp-160,
112le
sj-pf3.7-01, 1500-10,000
20-tma2
A06B-0843-B101 #3000
Okuma OSP Bedienpult, 5020, e0105-800-195
1395-B73N-C2-P12
a06b-6064-h326 #h550
a06b-014-b077 #7000
1-hu3104-0ad01-z, encoder, 1-605-1040
hu3104-0ad01-z
a06b-0590-b002
1999, e00549a03
A06B-0503-B001 #7008
Allen Bradley AC Drive, 1336-c030-eaf-s1
ABB 15 HP Motor Controller # G02400A00
Mazak Servo Drive Unit, denke 05-0000
A06B-6044-H021, A20B-0009-0531/21H
a06b-6044-h108
a06b-6044-h021, a20b-0009-0531/22j
a06b-0151-b088 #7008
mori seiki msc-801
a06b-6064-h327
1ph7101-2nf02-0dj2
CIMR-mti-11k.h/CIMR-mti-11k
6av7671-4aa00-0aa0
1ft6105-8af71-3eg1
A06B-0147-B110 #0001
a06b-0157-b075
fd10b3bt38a
A06B-6041-H108, mit A20B-0005-0374/12E
a06b-0505-b203
TA603S490-G
1006-2228-0235039
a06b-0147-b084 #7008
A06B-0505-B205
a06b-0319-b004
A06B-0147-B184
a06b-6044-h008, a20b-0009-0530/22j
a06b-0502-b851
fca610mt
1ft6105-8ac71-1ab0
a06b-1211-b113 #0902
680B765G45
Art.-Nr. 9-39105-61
1ft6105-8af71-4eg1
msvb-sv-15ns, d72jv009300
11029d-xl
a06b-6078-h222#h500
Delco 3 HP AC Motor, 2G2454-R
5k38sn45a
FCA65M, H/W FCU6-MU021
a06b-0319-b001
a02b-0162-c091, mit a61l-0001-0094
E 0105-437-051
20-TMA1
E-PU2570A
11" 3-Jaw/Face
Knoll kts-25-50-t1
A06B-6044-H008, A20B-0009-0534/19H
a06b-6059-h206 #h511, a20b-1003-0010/15b a20b-0008-0033
6sc 6502-a4402-z, T 3414169
E7BVB007TXW3
A06B-0501-B002 #7000
Yaskawa Servomotor, ughmed - 20-TMA3
A06B-6058-H304, A16B-1110-0330/05B
adm1.2-100-300-w1
A06B-0165-B076 #7000
5K213BK307
bms19023630l
c0g4b, fr: 215tz
Kitagawa Stellantrieb s1875-21e
CCN6G1UUC64
ha300c-s mit Encoder, S/N 4y025
HA300CS
16-0272-50
bl-h200e-20t
a06b-0166-b176 #7000
240/480 -120
FANUC 7.5 kVA Trafo A80L-0026-0002 #A-01
14c09p4911
3r-sp5011
a06b-6044-h008, a20b-0008-0240/07d
M28-0426-G039H
1906901490
Aus Vereinigte Staaten von Amerika
CMPR-fd10b1b38a
JPB-160-2025-28
PB-160-2025-28
401-6001-018, 90-6300
a06b-1002-b100
13cb20e
a06b-1002-b100
a06b-0147-b088
TA603S490-G
GPA-63-E-20 R
1la6130 6aa16
bl-mc150e-20sn-a
Klasse 8538, Typ SEG35
SJ-J3.7 A, 1500/8000
TT-4208-4300-E
FANUC a02b-0098-c065
dvd-360
SZS 66/120
AF-502507-0480
a2-8
dl-sbz-2-18.5k-d
a06b-0265-b101
a06b-0502-b272 #7000
Okuma miv0203-1-b1 AC Servo Drive, 1006-2228-015-012
Yaskawa ugjmed - 80LMU11
GMT150L50,
a06b-0358-b755/a06b-0358-b755-r
MS4436B
1ft6082-8ah71-3eg0
A02B-0120-C071, XA02B-0120-C071#16T
a06b-0502-b004 #7008
cr29-0416-002
bl-mh201e-20sn-a
DTD 3500
a06b-6044-h008, a20b-0008-0030/04c
DDC01.2-N050C-DS01-02-FW
etk000760
Okuma miv01-1-b3
1336S-B025-AN-EN4
30AJA-F
HA300CB
a06b-0651-b505
Matsuura mc-710v-2
bl-mc150e-20sb
PHD138422
a06b-0315-b210 #7073
HH31C 8
Aus Vereinigte Staaten von Amerika
1FT6084-8AK71-1AG3
12-mu13 tfue - 25zc7
bl-mh201e-20sn-a
F8-SE, 1LC160B140N
10-590-10-A08A
a06b-0142-b176
203NC-S/HA203NC-S
s286584h4005
HA203CBS
bl-mh101e-12sb
A02B-0060-C035, A20B-1000-0480/04A
FANUC 21i-ta Controller Unit, a02b-0247-b542
A06B-6055-H108, A20B-0008-0030/02
FANUC #a22/2000 a06b-0147-b176
Yaskawa USAGED - 30a22t
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