CN114922254B - Automatic-switching negative-pressure-free water supply system and implementation method thereof - Google Patents

Automatic-switching negative-pressure-free water supply system and implementation method thereof Download PDF

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Publication number
CN114922254B
CN114922254B CN202210650699.0A CN202210650699A CN114922254B CN 114922254 B CN114922254 B CN 114922254B CN 202210650699 A CN202210650699 A CN 202210650699A CN 114922254 B CN114922254 B CN 114922254B
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China
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pin
line
water pump
pump motor
intermediate relay
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CN202210650699.0A
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Chinese (zh)
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CN114922254A (en
Inventor
陈倩倩
宋长广
刘晴
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Shandong Huali Water Supply Equipment Co ltd
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Shandong Huali Water Supply Equipment Co ltd
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B11/00—Arrangements or adaptations of tanks for water supply
    • E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/08—Arrangement of draining devices, e.g. manual shut-off valves
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The application discloses automatic no negative pressure water supply system of switching, including main power module, intermediate relay module, PLC module and motor drive module, main power module provides power supply for this system, and intermediate relay module provides the control loop of this system, and the PLC module is the control core of this system, is the place of sending of output and input instruction, also is the center of network conversion, and motor drive module is the drive information acquisition mechanism of this system. Has the following advantages: the system adopts the Siemens PLC control system, is also provided with a serial port to network port module and a central control computer, can be connected with an external Internet and a mobile phone communication network, can monitor and control the operation of equipment without being on the site of the equipment, and can perform quick response and processing when the operation of the equipment is abnormal.

Description

Automatic-switching negative-pressure-free water supply system and implementation method thereof
Technical Field
The invention relates to an automatic switching non-negative pressure water supply system and an implementation method thereof, belonging to the technical field of automatic control.
Background
At present, the existing non-negative pressure water supply system is generally provided with a steady flow tank or a water tank, and the steady flow tank or the water tank is arranged between a pressurizing pump set and a tap water pipe network so as to prevent the phenomenon of water inlet and water cutoff caused by direct pumping of the pressurizing pump from the tap water pipe network, which is a novel secondary water supply technology in recent years, and is a secondary water supply mode for directly pressurizing on the basis of the pressure of the water supply pipe network.
For example, in 2022, 01 and 07, a non-negative pressure water supply device is disclosed, which has a publication number of CN215442167, and includes a base, a surge tank, a constant pressure tank and a pump group, where the surge tank is mounted on a support on the base, and a water outlet pipe is arranged at the bottom of the surge tank; the constant pressure tank is positioned above the pressure stabilizing tank and is communicated with the pressure stabilizing tank; the pump set comprises a plurality of water pumps which are arranged on the base and distributed on two sides of the pressure stabilizing tank, and the water inlets of the water pumps are connected with the water outlet pipe, so that the occupied area of the non-negative pressure water supply equipment is effectively reduced, the use cost of the non-negative pressure water supply equipment can be effectively reduced, and the utility model solves the purposes of non-negative pressure water supply and cost saving and still has certain defects.
1. The problem that when municipal water supply pressure is low or water is temporarily absent, the device cannot realize water supply without negative pressure.
2. Remote networking and monitoring cannot be realized, when equipment fails or is abnormal, timely monitoring and processing cannot be realized, and the method is not suitable for the social demands at present of high networking.
Disclosure of Invention
The invention aims at solving the technical problems and provides an automatic switching non-negative pressure water supply system, a realization method device and a realization method thereof, wherein the system is provided with a water storage tank, can realize automatic switching between municipal water supply and the water storage tank and ensure uninterrupted water supply of equipment, adopts a Siemens PLC control system, is also provided with a serial port-to-network port module and a central control computer, can be connected with an external internet and a mobile phone communication network, can realize monitoring and controlling the operation of equipment without on the site of the equipment, and can perform quick response and processing when the operation of the equipment is abnormal.
In order to solve the technical problems, the invention adopts the following technical scheme:
the automatic switching non-negative pressure water supply system comprises a main power supply module, an intermediate relay module, a PLC module and a motor driving module, wherein the main power supply module provides a power supply for the system;
The PLC module comprises a CPU U1, wherein a 232 serial port of the CPU U1 is connected with a touch screen serial port, the part is used for communication between the CPU U1 and the touch screen, data and instructions of the system can be transmitted to the touch screen, a 485 serial port of the CPU U1 is connected with a serial port-to-network port module, the serial port-to-network port module is connected with a central control computer, the part is used for communication between the CPU U1 and the central control computer, and the data and instructions of the system can be transmitted to the central control computer;
the L+ pin and the M pin of the CPU unit U1 are connected with a +24V line and a 0V line, the part is used for a power supply of the CPU unit U1, the M pin, the 1M pin and the 2M pin of the CPU unit U1 are connected with the 0V line, the L pin, the 1L pin and the 2L pin of the CPU unit U1 are connected with the +24V line, the part is used for common wiring of all control pins of the CPU unit U1, one end of a Q0.0 pin of an output end of the CPU unit U1 is connected with one end of an intermediate relay KA1 coil, the other end of the intermediate relay KA1 coil is connected with the 0V line, one end of a Q0.1 pin of an output end of the CPU unit U1 is connected with one end of an intermediate relay KA2 coil, the other end of the intermediate relay KA3 coil is connected with the 0V line, the part is used for controlling the running of a motor of a 3# water pump, one end of a Q0.3 pin at the output end of a CPU unit U1 is connected with one end of a coil of an intermediate relay KA4, the other end of the coil of the intermediate relay KA4 is connected with a 0V line, the part is used for controlling the opening of a 1# pneumatic valve, one end of the Q0.4 pin at the output end of the CPU unit U1 is connected with one end of a coil of an intermediate relay KA5, the other end of the coil of the intermediate relay KA5 is connected with a 0V line, the part is used for controlling the opening of the 3# pneumatic valve, one end of the Q0.6 pin at the output end of the CPU unit U1 is connected with one end of the coil of the intermediate relay KA7, the other end of the coil of the intermediate relay KA7 is connected with the 0V line, this part is used for the control that 4# pneumatic valve opened, the Q0.7 foot one end of CPU unit U1 output is connected with the one end of intermediate relay KA8 coil, and 0V line is connected to the other end of intermediate relay KA8 coil, and this part is used for the control that 5# pneumatic valve opened, the Q1.0 foot one end of CPU unit U1 output is connected with the one end of intermediate relay KA9 coil, and 0V line is connected to the other end of intermediate relay KA9 coil, and this part is used for the control that 6# pneumatic valve opened.
Further, the main power supply module comprises a three-phase power supply R line, an S line, a T line and an N line, wherein the three-phase power supply R line, the S line, the T line and the N line are connected with one end of a breaker QF1, the other end of the breaker QF1 is connected with a three-phase power supply L1 line, a three-phase power supply L2 line, a three-phase power supply L3 line and a three-phase power supply N line, the three-phase power supply L1 line, the three-phase power supply L2 line and the three-phase power supply L3 line are connected with one end of a breaker QF2, the other end of the breaker QF2 is connected with one end of a 1# water pump motor frequency converter T1, the other end of the 1# water pump motor frequency converter T1 is connected with one end of a thermal relay RJ1, and the other end of the thermal relay RJ1 is connected with a 1# water pump motor M1, and the part is used for driving the 1# water pump motor M1 to operate and perform thermal protection;
the three-phase power supply is characterized in that a line L1, a line L2 and a line L3 are connected with one end of a breaker QF3, the other end of the breaker QF3 is connected with one end of a 2# water pump motor frequency converter T2, the other end of the 2# water pump motor frequency converter T2 is connected with one end of a thermal relay RJ2, the other end of the thermal relay RJ2 is connected with a 2# water pump motor M2, and the part is used for driving the 2# water pump motor M1 to operate and thermally protect;
the three-phase power supply is characterized in that a line L1, a line L2 and a line L3 are connected with one end of a breaker QF4, the other end of the breaker QF4 is connected with one end of a 3# water pump motor frequency converter T3, the other end of the 3# water pump motor frequency converter T3 is connected with one end of a thermal relay RJ3, the other end of the thermal relay RJ3 is connected with a 3# water pump motor M3, and the part is used for driving the 3# water pump motor M3 to operate and thermally protect;
The three-phase power supply is characterized in that one end of a breaker QF5 is connected to the three-phase power supply L1 line and the three-phase power supply N line, one end of a switch power supply is connected to the other end of the breaker QF5, the other end of the switch power supply is connected with a +24V line and a 0V line, the +24V line and the 0V line are connected with one end of a touch screen and one end of a serial port-to-network port, the three-phase power supply is used for supplying power for one end of the touch screen and the serial port-to-network port, and the three-phase power supply is also used for supplying direct current 24V power for other electric appliances.
Further, the intermediate relay module comprises an intermediate relay KA4 normally open contact, one end of the intermediate relay KA4 normally open contact is connected with a +24V line, the other end of the intermediate relay KA4 normally open contact is connected with an electromagnetic valve YV1 end, the other end of the electromagnetic valve YV1 is connected with a 0V line, the part is used for controlling a No. 1 pneumatic valve, the intermediate relay module further comprises an intermediate relay KA5 normally open contact, one end of the intermediate relay KA5 normally open contact is connected with a +24V line, the other end of the intermediate relay KA5 normally open contact is connected with an electromagnetic valve YV2 end, the other end of the electromagnetic valve YV2 is connected with a 0V line, the part is used for controlling a No. 2 pneumatic valve, the intermediate relay module comprises an intermediate relay KA6 normally open contact, one end of the intermediate relay KA6 normally open contact is connected with a +24V line, the other end of the intermediate relay KA6 normally open contact is connected with an electromagnetic valve YV3 end, the other end of the electromagnetic valve YV3 is connected with a 0V line, the part is used for controlling the 3# pneumatic valve, the intermediate relay module comprises an intermediate relay KA7 normally open contact, one end of the intermediate relay KA7 normally open contact is connected with a +24V line, the other end of the intermediate relay KA7 normally open contact is connected with a solenoid valve YV4 end, the other end of the solenoid valve YV4 is connected with a 0V line, the part is used for controlling the 4# pneumatic valve, the intermediate relay module comprises an intermediate relay KA8 normally open contact, one end of the intermediate relay KA8 normally open contact is connected with a +24V line, the other end of the intermediate relay KA8 normally open contact is connected with a solenoid valve YV5 end, the other end of the solenoid valve YV5 is connected with a 0V line, the part is used for controlling the 5# pneumatic valve, the intermediate relay module comprises an intermediate relay KA9 normally open contact, one end of the intermediate relay KA9 normally open contact is connected with a +24V line, the other end of the intermediate relay KA9 normally open contact is connected with a solenoid valve YV6 end, the other end of the electromagnetic valve YV6 is connected with a 0V line, and the 0V line is used for controlling the 6# pneumatic valve.
Further, the intermediate relay module still includes intermediate relay KA10 normally open contact, and intermediate relay KA10 normally open contact one end is connected with +24V line, and the intermediate relay KA10 normally open contact other end is connected with the red one end of pilot lamp, and the 0V line is connected to the red other end of pilot lamp, and this part is used for pilot lamp red control, the intermediate relay module still includes intermediate relay KA11 normally open contact, and intermediate relay KA11 normally open contact one end is connected with +24V line, and intermediate relay KA11 normally open contact other end is connected with the green one end of pilot lamp, and the green other end of pilot lamp is connected with 0V line, and this part is used for pilot lamp green control, intermediate relay KA12 normally open contact one end is connected with +24V line, and the normally open contact other end of intermediate relay KA12 is connected with the yellow one end of pilot lamp, and the other end of pilot lamp yellow is connected with the 0V line, and this part is used for pilot lamp yellow control, intermediate relay module still includes intermediate relay KA13 normally open contact one end is connected with +24V line, and the buzzer controller of the other end of pilot lamp normally open contact is used for the pilot lamp yellow.
Further, one end of a Q1.1 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA10 coil, the other end of the intermediate relay KA10 coil is connected with a 0V line, the part is used for controlling the turn-on of an indicator lamp red, one end of a Q1.2 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA11 coil, the other end of the intermediate relay KA11 coil is connected with the 0V line, the part is used for controlling the turn-on of the indicator lamp green, one end of a Q1.3 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA12 coil, the other end of the intermediate relay KA12 coil is connected with one end of an intermediate relay KA13 coil, and the other end of the intermediate relay KA13 coil is connected with the 0V line, and the part is used for controlling the turn-on of an indicator lamp buzzer.
Further, the I0.0 pin of CPU unit U1 input is connected with the one end of contact switch K1, the other end of contact switch K1 connects +24V line, this part is used for 1# water pump motor converter fault detection, the I0.1 pin of CPU unit U1 input is connected with the one end of contact switch K2, the other end of contact switch K2 is connected +24V line, this part is used for 2# water pump motor converter fault detection, the I0.2 pin of CPU unit U1 input is connected with the one end of contact switch K3, the other end of contact switch K3 is connected +24V line, this part is used for 3# water pump motor converter fault detection, the I0.3 pin of CPU unit U1 input is connected with the one end of contact switch K4, the other end of contact switch K4 is connected +24V line, this part is used for thermal relay RJ1 alarm detection, the one end of contact switch K5 is connected with the one end of contact switch K5, this part is used for detecting the one end of contact switch K2, the other end that is used for detecting the contact switch K2I 0.4 pin of contact switch K5 is connected with the one end of contact switch K3, this part is connected with the one end of knob 1, the one end of contact switch I1I 2 pin is connected with the end of contact switch K1, the other end of contact switch 1 is connected with the knob 1, the one end of the other end of contact switch is connected with the knob 1, the other end of the electrical equipment is connected with the electrical equipment is used for detecting the other end of the electrical equipment, the electrical equipment is connected with the electrical equipment, the electrical equipment.
Further, the L+ pin, the M pin of PLC analog unit U2 are connected with +24V line, 0V line, and this part is used for the power of PLC analog unit U2, the RA pin, the A+ pin of PLC analog unit U2 are connected with AI0+ signal, and the RA-pin of PLC analog unit U2 is connected with AI 0-signal, and this part is used for gathering 1# water pump motor frequency feedback signal, the RB pin, the B+ pin of PLC analog unit U2 are connected with AI2+ signal, and the RC-pin of analog unit U2 is connected with AI 2-signal, and this part is used for gathering 2# water pump motor frequency feedback signal, RC pin, the C+ pin of PLC analog unit U2 are connected with AI4+ signal, and the RB-pin of PLC analog unit U2 is connected with AI 4-signal, and this part is used for gathering 3# water pump motor frequency feedback signal, RD pin, D+ pin of PLC analog unit U2 are connected with AI6+ signal, and the RC-pin of PLC analog unit U2 is connected with AI 6-signal, and this part is used for gathering 2# water pump motor frequency feedback signal, AQ 0-pin is connected with this PLC 0-signal, and this part is used for the water pump frequency of water pump unit U0.
Further, the L+ pin and the M pin of the PLC analog unit U3 are connected with a +24V line and a 0V line, the part is used for a power supply of the PLC analog unit U3, the RA pin and the A+ pin of the PLC analog unit U3 are connected with AI8+ signals, the RA-pin of the PLC analog unit U3 is connected with AI 8-signals, the part is used for collecting pressure signals of a surge tank, the RB pin and the B+ pin of the PLC analog unit U3 are connected with AI10+ signals, the RB-pin of the PLC analog unit U3 is connected with AI 10-signals, the part is used for collecting tap water pressure signals, the RC pin and the C+ pin of the PLC analog unit U3 are connected with AI12+ signals, and the RC-pin of the PLC analog unit U3 is connected with AI 12-signals;
The utility model discloses a PLC analog unit U4's L+ foot, M foot are connected with +24V line, 0V line, and this part is used for PLC analog unit U4's power, PLC analog unit U4's M0 foot is connected with AQ 4-signal, and PLC analog unit U4's I0 foot is connected with AQ4+ signal, and this part is used for exporting 2# water pump motor frequency signal, PLC analog unit U4's M1 foot is connected with AQ 6-signal, and I0 foot is connected with AQ6+ signal, and this part is used for exporting 3# water pump motor frequency signal.
Further, the motor driving module comprises a 1# water pump motor frequency converter T1, a 2# water pump motor frequency converter T2 and a 3# water pump motor frequency converter T3, wherein an R pin, an S pin and a T pin of the 1# water pump motor frequency converter T1 are connected with an L1 line, an L2 line and an L3 line, the part is used for providing power for the 1# water pump motor frequency converter T1, a U pin, a V pin and a W pin of the 1# water pump motor frequency converter T1 are connected with a 1# water pump motor M1, a DI1 pin of the 1# water pump motor frequency converter T1 is connected with one end of an intermediate relay KA1, the other end of the intermediate relay KA1 is connected with a COM pin of the 1# water pump motor frequency converter T1, an AI1 pin of the 1# water pump motor frequency converter T1 is connected with an AQ0+ signal of a PLC analog unit U2, a 1# GND pin of the 1# water pump motor frequency converter T1 is connected with an AQ0-signal of a PLC analog unit U2, the 1# water pump motor frequency converter T1 is connected with an AI#0-GND 1, and the 1# water pump motor frequency converter is connected with the PLC analog unit U2 in the running direction of the PLC 1, # 1;
The R pin, the S pin and the T pin of the 2# water pump motor frequency converter T2 are connected with an L1 line, an L2 line and an L3 line, the part is used for providing power for the 2# water pump motor frequency converter T2, the U pin, the V pin and the W pin of the 2# water pump motor frequency converter T2 are connected with a 2# water pump motor M2, the DI1 pin of the 2# water pump motor frequency converter T2 is connected with one end of an intermediate relay KA2, the other end of the intermediate relay KA2 is connected with a COM pin of the 2# water pump motor frequency converter T2, the AI1 pin of the 2# water pump motor frequency converter T2 is connected with an AQ4+ signal of the PLC analog unit U4, the 1# GND pin of the 2# water pump motor frequency converter T2 is connected with an AQ 4-signal of the PLC analog unit U4, the AO1 pin of the 2# water pump motor frequency converter T2 is connected with an AI2+ signal of the PLC analog unit U2, and the 2# GND pin of the 2# water pump motor frequency converter T2 is connected with an AI 2-signal of the PLC analog unit U2, which is used for driving the 2# water pump motor M2 to operate and controlling the operation speed and direction of the 2# water pump motor M2;
the utility model provides a water pump, including 3# water pump motor converter T3, wherein 3# water pump motor converter T3 'S R foot, S foot, T foot are connected with L1 line, L2 line, L3 line, and this part is used for 3# water pump motor converter T3' S power, 3# water pump motor M3 is connected to 3# water pump motor converter T3 'S U foot, V foot, W foot, 3# water pump motor converter T3' S DI1 foot is connected with intermediate relay KA3 'S one end, and 3# water pump motor converter T3' S COM foot is connected to intermediate relay KA3 'S the other end, 3# water pump motor converter T3' S AI1 foot is connected with PLC analog unit U4 'S AQ6+ signal, 3# water pump motor converter T3' S1 # GND foot is connected with PLC analog unit U4 'S AQ6-signal, 3# water pump motor converter T3' S AO1 foot is connected with PLC analog unit U2 'S AI4+ signal, 3# water pump motor converter T3' S2 analog unit GND 2 'S the other end is connected with 3# water pump motor converter T3' S COM foot, 3 is used for controlling the operation direction of this water pump, 3# water pump motor 3 is used for controlling with this water pump running direction.
The realization method of the automatic switching non-negative pressure water supply system comprises the following steps:
the working procedure starts in step S100, and the procedure starts and step S101 is executed;
step S101, the control system judges whether the running water pressure meets the equipment starting signal, if yes, the step S102 is executed; if not, executing step S103;
step S102, starting a No. 2 pneumatic valve, and closing the No. 1 pneumatic valve and the No. 3 pneumatic valve; step S104 is executed;
step S103, starting the 1# pneumatic valve and the 3# pneumatic valve, closing the 2# pneumatic valve and the 4# pneumatic valve, and closing the 1# water pump motor; step S104 is executed;
step S104, starting a No. 2 water pump motor; step S105 is performed;
step S105, the control system judges whether the water supply pressure meets the water supply requirement; if yes, the program jumps to the program starting S101, if not, the step S106 is executed;
step S106, starting a motor of the No. 3 water pump; jump to the beginning of the procedure S101 and so on.
The water replenishing and circulating process of the water storage tank starts in step S200, the process starts, and step S201 is executed;
step S201, the control system judges whether the liquid level of the water storage tank reaches the set liquid level, if so, the step S202 is executed; if not, executing step S203;
step S202, a motor of the No. 1 water pump is started, a No. 1 pneumatic valve and a No. 3 pneumatic valve are closed, and a No. 4 pneumatic valve is opened; the program jumps to the program start S201;
Step S203, the motor of the No. 1 water pump is closed, the No. 3 pneumatic valve and the No. 4 pneumatic valve are closed, and the No. 1 pneumatic valve is opened; step S204 is executed;
step S204, the control system judges whether the running water pressure meets the equipment starting signal; if yes, the program jumps to the program start S201; if not, go to step S205;
step S205, closing the No. 1 pneumatic valve, and waiting for the increase of tap water pressure; the process jumps to the process start S204; this is repeated.
Compared with the prior art, the invention has the following technical effects:
1. the system is provided with the water storage tank, the water storage tank is communicated with the municipal water supply pipeline and the equipment surge tank, when municipal water supply pressure is normal, the water storage tank can be used for internal water circulation, long-time unused water quality deterioration of the water storage tank is prevented, when municipal water supply pressure is too low or no water exists, the water supply mode of the water storage tank can be automatically switched, and uninterrupted water supply of equipment is ensured.
2. The system adopts a Siemens PLC control system, and is also provided with a serial port-to-network port module and a central control computer, wherein one end of the serial port-to-network port module is connected with a serial port of the PLC control system, the other end of the serial port-to-network port module is connected with the central control computer, the PLC control system transmits control instructions and operation data to the central control computer through the serial port-to-network port module when controlling the normal operation of equipment, and the central control computer can be connected with the Internet and a mobile phone communication network, so that the operation of the equipment can be monitored and controlled without being on site, and the equipment can be rapidly responded and processed when the operation is abnormal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. The various elements or portions thereof are not necessarily drawn to scale and in any particular direction in the drawings.
FIG. 1 is an electrical schematic diagram of a main power module of the present invention;
FIG. 2 is an electrical schematic of an intermediate relay module of the present invention;
FIG. 3 is an electrical schematic diagram of the CPU unit of the PLC module of the present invention;
FIG. 4 is an electrical schematic diagram of a PLC analog input unit U2 of the PLC module of the present invention;
FIG. 5 is an electrical schematic diagram of a PLC analog input unit U3 of the PLC module of the present invention;
FIG. 6 is an electrical schematic diagram of a PLC analog input unit U4 of the PLC module of the present invention;
FIG. 7 is an electrical schematic of the motor drive module of the present invention;
fig. 8 and 9 are flowcharts of an implementation method in the present invention.
Detailed Description
Embodiment 1, an automatic switching's no negative pressure water supply system, including main power module, intermediate relay module, PLC module and motor drive module, main power module provides power supply for this system, and intermediate relay module provides the control loop of this system, and the PLC module is the control core of this system, is the place of sending of output and input instruction, also is the center of network conversion, and motor drive module is the drive information acquisition mechanism of this system.
The main power supply module comprises a circuit breaker, the circuit breaker is connected with a water pump motor frequency converter, the water pump motor frequency converter is connected with a thermal relay and a water pump motor, the part is used for providing a power supply for the water pump motor, and the circuit breaker is also connected with a direct-current 24-volt switching power supply for providing 24V power for a touch screen, a serial port-to-net port module and other electric appliances.
As shown in fig. 1, the main power module includes three-phase power R line, S line, T line and N line, and three-phase power R line, S line, T line and N line are connected with circuit breaker QF1 one end, and circuit breaker QF1 other end is connected three-phase power L1 line, L2 line, L3 line and N line, and three-phase power L1 line, L2 line, L3 line are connected with circuit breaker QF2 one end, and the circuit breaker QF2 other end is connected with 1# water pump motor converter T1 one end, and 1# water pump motor converter T1 other end is connected with thermal relay RJ1 'S one end, and thermal relay RJ 1' S the other end is connected with 1# water pump motor M1, and this part is used for driving 1# water pump motor M1 operation and thermal protection.
The three-phase power supply is characterized in that a three-phase power supply L1 line, a three-phase power supply L2 line and a three-phase power supply L3 line are connected with one end of a breaker QF3, the other end of the breaker QF3 is connected with one end of a 2# water pump motor frequency converter T2, the other end of the 2# water pump motor frequency converter T2 is connected with one end of a thermal relay RJ2, the other end of the thermal relay RJ2 is connected with a 2# water pump motor M2, and the part is used for driving the 2# water pump motor M1 to operate and thermally protect.
The three-phase power supply is characterized in that a three-phase power supply L1 line, a three-phase power supply L2 line and a three-phase power supply L3 line are connected with one end of a breaker QF4, the other end of the breaker QF4 is connected with one end of a 3# water pump motor frequency converter T3, the other end of the 3# water pump motor frequency converter T3 is connected with one end of a thermal relay RJ3, the other end of the thermal relay RJ3 is connected with a 3# water pump motor M3, and the part is used for driving the 3# water pump motor M3 to operate and thermally protect.
The three-phase power supply is characterized in that one end of a breaker QF5 is connected to the three-phase power supply L1 line and the three-phase power supply N line, one end of a switch power supply is connected to the other end of the breaker QF5, the other end of the switch power supply is connected with a +24V line and a 0V line, the +24V line and the 0V line are connected with one end of a touch screen and one end of a serial port-to-network port, the three-phase power supply is used for supplying power for one end of the touch screen and the serial port-to-network port, and the three-phase power supply is also used for supplying direct current 24V power for other electric appliances.
The intermediate relay module comprises an intermediate relay normally open contact, wherein the intermediate relay normally open contact is connected with an electromagnetic valve, the intermediate relay normally open contact is used for controlling a pneumatic valve start-stop loop, the intermediate relay normally open contact is also connected with an indicator lamp, and the intermediate relay normally open contact is used for controlling the start-stop of the indicator lamp.
As shown in figure 2, the intermediate relay module comprises an intermediate relay KA4 normally open contact, one end of the intermediate relay KA4 normally open contact is connected with a +24V line, the other end of the intermediate relay KA4 normally open contact is connected with a solenoid valve YV1 end, the other end of the solenoid valve YV1 is connected with a 0V line, the part is used for controlling a No. 1 pneumatic valve, the intermediate relay module also comprises an intermediate relay KA5 normally open contact, one end of the intermediate relay KA5 normally open contact is connected with a +24V line, the other end of the intermediate relay KA5 normally open contact is connected with a solenoid valve YV2 end, the other end of the solenoid valve YV2 is connected with a 0V line, the part is used for controlling a No. 2 pneumatic valve, the intermediate relay module comprises an intermediate relay KA6 normally open contact, one end of the intermediate relay KA6 normally open contact is connected with a +24V line, the other end of the intermediate relay KA6 normally open contact is connected with a solenoid valve YV3 end, the other end of the solenoid valve YV3 is connected with a 0V line, the part is used for controlling the 3# pneumatic valve, the intermediate relay module comprises an intermediate relay KA7 normally open contact, one end of the intermediate relay KA7 normally open contact is connected with a +24V line, the other end of the intermediate relay KA7 normally open contact is connected with a solenoid valve YV4 end, the other end of the solenoid valve YV4 is connected with a 0V line, the part is used for controlling the 4# pneumatic valve, the intermediate relay module comprises an intermediate relay KA8 normally open contact, one end of the intermediate relay KA8 normally open contact is connected with a +24V line, the other end of the intermediate relay KA8 normally open contact is connected with a solenoid valve YV5 end, the other end of the solenoid valve YV5 is connected with a 0V line, the part is used for controlling the 5# pneumatic valve, the intermediate relay module comprises an intermediate relay KA9 normally open contact, one end of the intermediate relay KA9 normally open contact is connected with a +24V line, the other end of the intermediate relay KA9 normally open contact is connected with a solenoid valve YV6 end, the other end of the electromagnetic valve YV6 is connected with a 0V line, and the 0V line is used for controlling the 6# pneumatic valve.
The utility model provides an intermediate relay module, intermediate relay KA10 normally open contact one end is connected with +24V line, and intermediate relay KA10 normally open contact other end is connected with the one end that the pilot lamp is red, and the 0V line is connected to the other end that the pilot lamp is red, and this part is used for pilot lamp red control, intermediate relay KA11 normally open contact one end is connected with +24V line, and intermediate relay KA11 normally open contact other end is connected with the one end that the pilot lamp is green, and the 0V line is connected to the other end that the pilot lamp is green, and this part is used for pilot lamp green control, intermediate relay KA12 normally open contact one end is connected with the one end that the pilot lamp is yellow, and the other end that the pilot lamp is yellow is connected with 0V line, and this part is used for pilot lamp yellow control, intermediate relay KA13 normally open contact one end is connected with +24V line, and the other end that the buzzer is connected with the pilot lamp is normally open contact, and this part is used for pilot lamp yellow.
As shown in fig. 3, the PLC module includes a CPU unit U1, a 232 serial port of the CPU unit U1 is connected with a serial port of a touch screen, and this part is used for communication between the CPU unit U1 and the touch screen, so that data and instructions of the system can be transmitted to the touch screen, a 485 serial port of the CPU unit U1 is connected with a serial port-to-internet port module, and the serial port-to-internet port module is connected with a central computer, and this part is used for communication between the CPU unit U1 and the central computer, so that data and instructions of the system can be transmitted to the central computer.
The output end of the CPU unit U1 is connected with an intermediate relay coil, and the output end of the CPU unit U1 is used for controlling the relay coil to realize the starting of the water pump motor, the pneumatic valve and the indicator lamp.
The L+ pin and the M pin of the CPU unit U1 are connected with a +24V line and a 0V line, the part is used for a power supply of the CPU unit U1, the M pin, the 1M pin and the 2M pin of the CPU unit U1 are connected with the 0V line, the L pin, the 1L pin and the 2L pin of the CPU unit U1 are connected with the +24V line, the part is used for common wiring of all control pins of the CPU unit U1, one end of a Q0.0 pin of an output end of the CPU unit U1 is connected with one end of an intermediate relay KA1 coil, the other end of the intermediate relay KA1 coil is connected with the 0V line, one end of a Q0.1 pin of an output end of the CPU unit U1 is connected with one end of an intermediate relay KA2 coil, the other end of the intermediate relay KA3 coil is connected with the 0V line, the part is used for controlling the running of a motor of a 3# water pump, one end of a Q0.3 pin at the output end of a CPU unit U1 is connected with one end of a coil of an intermediate relay KA4, the other end of the coil of the intermediate relay KA4 is connected with a 0V line, the part is used for controlling the opening of a 1# pneumatic valve, one end of the Q0.4 pin at the output end of the CPU unit U1 is connected with one end of a coil of an intermediate relay KA5, the other end of the coil of the intermediate relay KA5 is connected with a 0V line, the part is used for controlling the opening of the 3# pneumatic valve, one end of the Q0.6 pin at the output end of the CPU unit U1 is connected with one end of the coil of the intermediate relay KA7, the other end of the coil of the intermediate relay KA7 is connected with the 0V line, this part is used for the control that 4# pneumatic valve opened, the Q0.7 foot one end of CPU unit U1 output is connected with the one end of intermediate relay KA8 coil, and 0V line is connected to the other end of intermediate relay KA8 coil, and this part is used for the control that 5# pneumatic valve opened, the Q1.0 foot one end of CPU unit U1 output is connected with the one end of intermediate relay KA9 coil, and 0V line is connected to the other end of intermediate relay KA9 coil, and this part is used for the control that 6# pneumatic valve opened.
One end of a Q1.1 pin at the output end of the CPU unit U1 is connected with one end of a coil of the intermediate relay KA10, the other end of the coil of the intermediate relay KA10 is connected with a 0V line, the part is used for controlling the red start of the indicator lamp, one end of a Q1.2 pin at the output end of the CPU unit U1 is connected with one end of a coil of the intermediate relay KA11, the other end of the coil of the intermediate relay KA11 is connected with the 0V line, the part is used for controlling the green start of the indicator lamp, one end of a Q1.3 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA12 coil, the other end of the intermediate relay KA12 coil is connected with a 0V line, the part is used for controlling the turn-on of the indicator lamp yellow, one end of a Q1.4 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA13 coil, the other end of the intermediate relay KA13 coil is connected with the 0V line, and the part is used for controlling the turn-on of the indicator lamp buzzer.
The input end of the CPU unit U1 is connected with a contact switch, and the state of the water pump motor frequency converter, the water pump motor thermal relay and the equipment knob is detected by the input end of the CPU unit U1 through the contact switch.
The CPU unit U1 input I0.0 foot is connected with one end of contact switch K1, contact switch K1 'S the other end is connected +24V line, this part is used for 1# water pump motor converter fault detection, CPU unit U1 input I0.1 foot is connected with contact switch K2' S one end, contact switch K2 'S the other end is connected +24V line, this part is used for 2# water pump motor converter fault detection, CPU unit U1 input I0.2 foot is connected with contact switch K3' S one end, contact switch K3 'S the other end is connected +24V line, this part is used for 3# water pump motor converter fault detection, CPU unit U1 input I0.3 foot is connected with contact switch K4' S one end, contact switch K4 'S the other end is connected +24V line, this part is used for thermal relay RJ1 alarm detection, CPU unit U1 input I0.4' S the other end is connected with contact switch K5 'S one end, contact switch K5' S the other end is connected to +24V line, this part is used for detecting relay unit U1 input 6, the other end is connected to the one end of the electrical equipment of 3, the other end that is used for detecting 3I 1, the end of electrical equipment is connected to 3I 1, the other end of electrical equipment is connected to the electrical equipment is connected to 3, the other end of electrical equipment is connected to the other end of the electrical equipment is connected to the electrical equipment.
As shown in fig. 4, the PLC module further includes a PLC analog unit U2, an input end of the PLC analog unit U2 is used for collecting signals of the frequency of the water pump motor and the liquid level of the water storage tank, and an output end of the PLC analog unit U2 is used for outputting a frequency signal of the 1# water pump motor and transmitting the processed signal data to the CPU unit U1, so as to provide a signal basis for the control of the system.
The PLC analog unit U2 is characterized in that an L+ pin and an M pin of the PLC analog unit U2 are connected with a +24V line and a 0V line, the part is used for a power supply of the PLC analog unit U2, an RA pin and an A+ pin of the PLC analog unit U2 are connected with AI0+ signals, the part is used for collecting 1# water pump motor frequency feedback signals, an RB pin and a B+ pin of the PLC analog unit U2 are connected with AI2+ signals, an RC pin of the analog unit U2 is connected with AI 2-signals, the part is used for collecting 2# water pump motor frequency feedback signals, an RC pin and a C+ pin of the PLC analog unit U2 are connected with AI 4-signals, the part is used for collecting 3# water pump motor frequency feedback signals, an RD pin and a D+ pin of the PLC analog unit U2 are connected with AI6+ signals, an RD pin of the PLC analog unit U2 is connected with AI 6-signals, the part is used for collecting 2# water pump motor frequency feedback signals, and the part is used for collecting 2# water pump frequency feedback signals and the part is connected with the PLC analog unit U0+0.
As shown in fig. 5, the PLC module further includes a PLC analog unit U3, where the PLC analog unit U3 is configured to collect signals of the pressure of the surge tank, the pressure of the tap water, and the pressure of the supply water, and transmit the processed signal data to the CPU unit U1, so as to provide a signal basis for control of the system.
The PLC analog unit U3 L+ pin, M pin are connected with +24V line, 0V line, and this part is used for PLC analog unit U3's power, PLC analog unit U3's RA pin, A+ pin are connected with AI8+ signal, and PLC analog unit U3's RA-pin is connected with AI 8-signal, and this part is used for gathering the surge tank pressure signal, PLC analog unit U3's RB pin, B+ pin are connected with AI10+ signal, and PLC analog unit U3's RB-pin is connected with AI 10-signal, and this part is used for gathering running water pressure signal, PLC analog unit U3's RC pin, C+ pin are connected with AI12+ signal, and PLC analog unit U3's RC-pin is connected with AI 12-signal, and this part is used for gathering the water supply signal.
As shown in fig. 6, the PLC module further includes a PLC analog unit U4, and an output end of the PLC analog unit U4 is configured to output frequency signals of the 2# water pump motor and the 3# water pump motor, and transmit the processed signal data to the CPU unit U1, so as to provide a signal basis for control of the system.
The utility model discloses a PLC analog unit U4's L+ foot, M foot are connected with +24V line, 0V line, and this part is used for PLC analog unit U4's power, PLC analog unit U4's M0 foot is connected with AQ 4-signal, and PLC analog unit U4's I0 foot is connected with AQ4+ signal, and this part is used for exporting 2# water pump motor frequency signal, PLC analog unit U4's M1 foot is connected with AQ 6-signal, and I0 foot is connected with AQ6+ signal, and this part is used for exporting 3# water pump motor frequency signal.
The motor driving module comprises a 1# water pump motor frequency converter T1, a 2# water pump motor frequency converter T2 and a 3# water pump motor frequency converter T3, wherein the 1# water pump motor frequency converter T1, the 2# water pump motor frequency converter T2 and the 3# water pump motor frequency converter T3, the 1# water pump motor frequency converter T1 is connected with a 1# water pump motor M1, the 2# water pump motor frequency converter T2 is connected with a 2# water pump motor M2, the 3# water pump motor frequency converter T3 is connected with a 3# water pump motor M3, and the part is used for controlling the running speed and the running direction of the corresponding water pump motor and feeding back the running state of the motor to the PLC module part.
As shown in fig. 7, the R, S, and T pins of the 1# water pump motor inverter T1 are connected with L1, L2, and L3 lines, which are used for providing power to the 1# water pump motor inverter T1, the U, V, and W pins of the 1# water pump motor inverter T1 are connected with the 1# water pump motor M1, the DI1 pin of the 1# water pump motor inverter T1 is connected with one end of the intermediate relay KA1, the other end of the intermediate relay KA1 is connected with the COM pin of the 1# water pump motor inverter T1, the AI1 pin of the 1# water pump motor inverter T1 is connected with the aq0+ signal of the PLC analog unit U2, the 1# gnd pin of the 1# water pump motor inverter T1 is connected with the aq0+ signal of the PLC analog unit U2, the AO1 pin of the 1# water pump motor inverter T1 is connected with the AI0+ signal of the PLC analog unit U2, and the 2 pin of the 1# water pump motor inverter T1 is connected with the analog unit U2, and is used for controlling the running direction of the water pump motor M1.
As shown in fig. 7, the R, S, and T pins of the 2# water pump motor inverter T2 are connected with L1, L2, and L3 lines, which are used for providing power to the 2# water pump motor inverter T2, the U, V, and W pins of the 2# water pump motor inverter T2 are connected with the 2# water pump motor M2, the DI1 pin of the 2# water pump motor inverter T2 is connected with one end of the intermediate relay KA2, the other end of the intermediate relay KA2 is connected with the COM pin of the 2# water pump motor inverter T2, the aq4+ signal of the PLC analog unit U4 is connected to the 1 pin of the 2# water pump motor inverter T2, the aq4-signal of the PLC analog unit U4 is connected to the 1# gnd pin of the 2# water pump motor inverter T2, the AO1 pin of the 2# water pump motor inverter T2 is connected with the AI2+ signal of the PLC analog unit U2, the 2# water pump motor inverter T2 is connected with the analog unit AI 2_2, and the AI2 is used for controlling the running direction of the water pump motor M2.
As shown in fig. 7, the 3# water pump motor frequency converter T3, wherein the R foot, S foot, T foot of the 3# water pump motor frequency converter T3 are connected with L1 line, L2 line, L3 line, this part is used for the power of 3# water pump motor frequency converter T3, the U foot, V foot, W foot of 3# water pump motor frequency converter T3 connect 3# water pump motor M3, the DI1 foot of 3# water pump motor frequency converter T3 is connected with the one end of intermediate relay KA3, the other end of intermediate relay KA3 is connected with the COM foot of 3# water pump motor frequency converter T3, the AI1 foot of 3# water pump motor frequency converter T3 is connected with the aq6+ signal of PLC analog unit U4, the 1# gnd foot of 3# water pump motor frequency converter T3 is connected with the aq6-signal of PLC analog unit U4, the AO1 foot of 3# water pump motor frequency converter T3 is connected with the AI4+ signal of PLC analog unit U2, 3# water pump motor frequency converter T3 connects the analog unit gnd 2 with this water pump motor frequency converter 3# 3, and the control part of 3# water pump motor running direction is used for controlling this water pump motor running direction.
As shown in fig. 8, to further explain the networking and automatic switching non-negative pressure water supply system and the implementation method thereof, the steps of the implementation method will be described as follows.
The working procedure starts in step S100, and the procedure starts and step S101 is executed;
step S101, the control system judges whether the running water pressure meets the equipment starting signal, if yes, the step S102 is executed; if not, executing step S103;
step S102, starting a No. 2 pneumatic valve, and closing the No. 1 pneumatic valve and the No. 3 pneumatic valve; step S104 is executed;
step S103, starting the 1# pneumatic valve and the 3# pneumatic valve, closing the 2# pneumatic valve and the 4# pneumatic valve, and closing the 1# water pump motor; step S104 is executed;
step S104, starting a No. 2 water pump motor; step S105 is performed;
step S105, the control system judges whether the water supply pressure meets the water supply requirement; if yes, the program jumps to the program starting S101, if not, the step S106 is executed;
step S106, starting a motor of the No. 3 water pump; jump to the beginning of the procedure S101 and so on.
As shown in fig. 9, the water tank water replenishing and circulating process starts in step S200, and the process starts and step S201 is executed;
step S201, the control system judges whether the liquid level of the water storage tank reaches the set liquid level, if so, the step S202 is executed; if not, executing step S203;
Step S202, a motor of the No. 1 water pump is started, a No. 1 pneumatic valve and a No. 3 pneumatic valve are closed, and a No. 4 pneumatic valve is opened; the program jumps to the program start S201;
step S203, the motor of the No. 1 water pump is closed, the No. 3 pneumatic valve and the No. 4 pneumatic valve are closed, and the No. 1 pneumatic valve is opened; step S204 is executed;
step S204, the control system judges whether the running water pressure meets the equipment starting signal; if yes, the program jumps to the program start S201; if not, go to step S205;
step S205, closing the No. 1 pneumatic valve, and waiting for the increase of tap water pressure; the process jumps to the process start S204; this is repeated.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (2)

1. An automatic switching non-negative pressure water supply system, which is characterized in that: the system comprises a main power supply module, an intermediate relay module, a PLC module and a motor driving module, wherein the main power supply module provides a power supply for the system, the intermediate relay module provides a control loop of the system, the PLC module is a control core of the system, is a place for sending out output and input instructions and is also a center for network conversion, and the motor driving module is a driving information acquisition mechanism of the system;
The PLC module comprises a CPU unit U1, wherein a 232 serial port of the CPU unit U1 is connected with a touch screen serial port, the part is used for communication between the CPU unit U1 and the touch screen and transmitting data and instructions of the system to the touch screen, a 485 serial port of the CPU unit U1 is connected with a serial port-to-network port module, the serial port-to-network port module is connected with a central control computer, and the part is used for communication between the CPU unit U1 and the central control computer and transmitting data and instructions of the system to the central control computer;
the L+ pin and the M pin of the CPU unit U1 are respectively connected with a +24V line and a 0V line, the parts are used for the power supply of the CPU unit U1, the M pin, the 1M pin and the 2M pin of the CPU unit U1 are connected with the 0V line, the L pin, the 1L pin and the 2L pin of the CPU unit U1 are connected with the +24V line, the parts are used for the common wiring of all control pins of the CPU unit U1, one end of the Q0.0 pin of the output end of the CPU unit U1 is connected with one end of an intermediate relay KA1 coil, the other end of the Q0.1 pin of the output end of the CPU unit U1 is connected with one end of an intermediate relay KA2 coil, the other end of the intermediate relay KA2 coil is connected with the 0V line, the parts are used for the control of the operation of the 2# water pump motor M2, one end of the Q0.2 pin of the output end of the CPU unit U1 is connected with one end of the intermediate relay KA3 coil, the other end of the intermediate relay KA3 coil is connected with a 0V line, the part is used for controlling the operation of the 3# water pump motor M3, one end of a Q0.3 pin at the output end of the CPU unit U1 is connected with one end of the intermediate relay KA4 coil, the other end of the intermediate relay KA4 coil is connected with the 0V line, the part is used for controlling the opening of the 1# pneumatic valve, one end of a Q0.4 pin at the output end of the CPU unit U1 is connected with one end of the intermediate relay KA5 coil, the other end of the Q0.5 pin at the output end of the CPU unit U1 is connected with one end of the intermediate relay KA6 coil, the other end of the intermediate relay KA6 coil is connected with the 0V line, the part is used for controlling the opening of the 3# pneumatic valve, one end of the Q0.6 pin at the output end of the CPU unit U1 is connected with one end of the intermediate relay KA7 coil, the other end of the intermediate relay KA7 coil is connected with the 0V line, the part is used for controlling the opening of the 4# pneumatic valve, one end of a Q0.7 pin at the output end of the CPU unit U1 is connected with one end of a coil of an intermediate relay KA8, the other end of the coil of the intermediate relay KA8 is connected with a 0V wire, the part is used for controlling the opening of the 5# pneumatic valve, one end of a Q1.0 pin at the output end of the CPU unit U1 is connected with one end of a coil of an intermediate relay KA9, the other end of the coil of the intermediate relay KA9 is connected with a 0V wire, and the part is used for controlling the opening of the 6# pneumatic valve;
The main power supply module comprises a three-phase power supply R line, an S line, a T line and an N line, wherein the three-phase power supply R line, the S line, the T line and the N line are connected with one end of a breaker QF1, the other end of the breaker QF1 is connected with the three-phase power supply L1 line, the L2 line, the L3 line and the N line, the three-phase power supply L1 line, the L2 line and the L3 line are connected with one end of a breaker QF2, the other end of the breaker QF2 is connected with one end of a 1# water pump motor frequency converter T1, the other end of the 1# water pump motor frequency converter T1 is connected with one end of a thermal relay RJ1, the other end of the thermal relay RJ1 is connected with a 1# water pump motor M1, and the part is used for driving the 1# water pump motor M1 to operate and thermally protect;
the three-phase power supply is characterized in that a line L1, a line L2 and a line L3 are connected with one end of a breaker QF3, the other end of the breaker QF3 is connected with one end of a 2# water pump motor frequency converter T2, the other end of the 2# water pump motor frequency converter T2 is connected with one end of a thermal relay RJ2, the other end of the thermal relay RJ2 is connected with a 2# water pump motor M2, and the part is used for driving the 2# water pump motor M2 to operate and thermally protect;
the three-phase power supply is characterized in that a line L1, a line L2 and a line L3 are connected with one end of a breaker QF4, the other end of the breaker QF4 is connected with one end of a 3# water pump motor frequency converter T3, the other end of the 3# water pump motor frequency converter T3 is connected with one end of a thermal relay RJ3, the other end of the thermal relay RJ3 is connected with a 3# water pump motor M3, and the part is used for driving the 3# water pump motor M3 to operate and thermally protect;
The three-phase power supply L1 line and the N line are connected with one end of a breaker QF5, the other end of the breaker QF5 is connected with one end of a switching power supply, the other end of the switching power supply is connected with a +24V line and a 0V line, the +24V line and the 0V line are respectively connected with one end of a touch screen and one end of a serial port-to-network port module, and the parts are used for supplying power for one end of the touch screen and the serial port-to-network port module and also used for supplying direct current 24V power for other electric appliances;
the intermediate relay module comprises an intermediate relay KA4 normally open contact, one end of the intermediate relay KA4 normally open contact is connected with a +24V line, the other end of the intermediate relay KA4 normally open contact is connected with an electromagnetic valve YV1 end, the other end of the electromagnetic valve YV1 is connected with a 0V line, the part is used for controlling a 1# pneumatic valve, the intermediate relay module also comprises an intermediate relay KA5 normally open contact, one end of the intermediate relay KA5 normally open contact is connected with a +24V line, the other end of the intermediate relay KA5 normally open contact is connected with an electromagnetic valve YV2 end, the other end of the electromagnetic valve YV2 is connected with a 0V line, the part is used for controlling a 2# pneumatic valve, the intermediate relay module comprises an intermediate relay KA6 normally open contact, one end of the intermediate relay KA6 normally open contact is connected with a +24V line, the other end of the intermediate relay KA6 normally open contact is connected with an electromagnetic valve YV3 end, the other end of the electromagnetic valve YV3 is connected with a 0V line, the part is used for controlling the 3# pneumatic valve, the intermediate relay module comprises an intermediate relay KA7 normally open contact, one end of the intermediate relay KA7 normally open contact is connected with a +24V line, the other end of the intermediate relay KA7 normally open contact is connected with a solenoid valve YV4 end, the other end of the solenoid valve YV4 is connected with a 0V line, the part is used for controlling the 4# pneumatic valve, the intermediate relay module comprises an intermediate relay KA8 normally open contact, one end of the intermediate relay KA8 normally open contact is connected with a +24V line, the other end of the intermediate relay KA8 normally open contact is connected with a solenoid valve YV5 end, the other end of the solenoid valve YV5 is connected with a 0V line, the part is used for controlling the 5# pneumatic valve, the intermediate relay module comprises an intermediate relay KA9 normally open contact, one end of the intermediate relay KA9 normally open contact is connected with a +24V line, the other end of the intermediate relay KA9 normally open contact is connected with a solenoid valve YV6 end, the other end of the electromagnetic valve YV6 is connected with a 0V line, and the 0V line is used for controlling a 6# pneumatic valve;
The relay module further comprises a relay KA10 normally open contact, one end of the relay KA10 normally open contact is connected with a +24V line, the other end of the relay KA10 normally open contact is connected with one end of an indicator light red, the other end of the indicator light red is connected with a 0V line, the part is used for indicator light red control, the relay module further comprises a relay KA11 normally open contact, one end of the relay KA11 normally open contact is connected with a +24V line, the other end of the relay KA11 normally open contact is connected with one end of an indicator light green, the other end of the indicator light green is connected with a 0V line, the part is used for indicator light green control, the one end of the relay KA12 normally open contact is connected with one end of an indicator light yellow, the other end of the indicator light yellow is connected with a 0V line, the part is used for indicator light yellow control, the relay KA13 normally open contact one end of the relay KA13 normally open contact is connected with a +24V line, the other end of the relay KA13 normally open contact is connected with one end of a buzzer, and the other end of the buzzer is used for indicator light yellow control;
One end of a Q1.1 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA10 coil, the other end of the intermediate relay KA10 coil is connected with a 0V wire, the part is used for controlling the turn-on of an indicator lamp red, one end of a Q1.2 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA11 coil, the other end of the intermediate relay KA11 coil is connected with a 0V wire, the part is used for controlling the turn-on of an indicator lamp green, one end of a Q1.3 pin at the output end of the CPU unit U1 is connected with one end of an intermediate relay KA12 coil, the other end of the intermediate relay KA12 coil is connected with a 0V wire, and the other end of the intermediate relay KA13 coil is used for controlling the turn-on of an indicator lamp buzzer;
the I0.0 pin at the input end of the CPU unit U1 is connected with one end of a contact switch K1, the other end of the contact switch K1 is connected with a +24V line, the part is used for detecting faults of a 1# water pump motor frequency converter T1, the I0.1 pin at the input end of the CPU unit U1 is connected with one end of a contact switch K2, the other end of the contact switch K2 is connected with a +24V line, the part is used for detecting faults of a 2# water pump motor frequency converter T2, the I0.2 pin at the input end of the CPU unit U1 is connected with one end of a contact switch K3, the other end of the contact switch K3 is connected with a +24V line, the part is used for detecting faults of a 3# water pump motor frequency converter T3, the I0.3 pin at the input end of the CPU unit U1 is connected with one end of a contact switch K4, the other end of the contact switch K4 is connected with a +24V line, the part is used for detecting faults of a thermal relay RJ1, the I0.4 pin at the input end of the CPU unit U1 is connected with one end of a contact switch K5, the other end of the contact switch K5 is connected to a +24V line, the part is used for thermal relay RJ2 alarm detection, the I0.5 pin at the input end of the CPU unit U1 is connected with one end of a contact switch K6, the other end of the contact switch K6 is connected to a +24V line, the part is used for thermal relay RJ3 alarm detection, the I0.6 pin at the input end of the CPU unit U1 is connected with one end of a knob switch S1, the other end of the knob switch S1 is connected to a +24V line, the part is used for equipment manual/automatic control knob detection, the I0.7 pin at the input end of the CPU unit U1 is connected with one end of a knob switch S2, and the other end of the knob switch S2 is connected to the +24V line, and the part is used for equipment emergency stop button detection;
The PLC module further comprises a PLC analog unit U2, wherein an L+ pin and an M pin of the PLC analog unit U2 are respectively connected with a +24V line and a 0V line, the part is used for a power supply of the PLC analog unit U2, the RA pin and the A+ pin of the PLC analog unit U2 are connected with AI0+ signals, the RA-pin of the PLC analog unit U2 is connected with AI 0-signals, the part is used for collecting a frequency feedback signal of a 1# water pump motor M1, an RB pin and a B+ pin of the PLC analog unit U2 are connected with AI2+ signals, an RC pin and a M pin of the PLC analog unit U2 are connected with AI 2-signals, the part is used for collecting a frequency feedback signal of a 2# water pump motor M2, an RC pin and a C+ pin of the PLC analog unit U2 are connected with AI4+ signals, the RB-pin of the PLC analog unit U2 is connected with AI 3 frequency feedback signals, the part is used for collecting a 3# water pump motor M3, the part is connected with AI6+ signals, the part is connected with an AQ 6+ signal, and the part is connected with an AQ 0-U2 analog unit and the PLC analog unit is connected with an AI 0-7;
the PLC module further comprises a PLC analog unit U3, wherein an L+ pin and an M pin of the PLC analog unit U3 are respectively connected with a +24V line and a 0V line, the part is used for a power supply of the PLC analog unit U3, an RA pin and an A+ pin of the PLC analog unit U3 are connected with AI8+ signals, an RA-pin of the PLC analog unit U3 is connected with AI 8-signals, the part is used for collecting pressure signals of the surge tank, an RB pin and a B+ pin of the PLC analog unit U3 are connected with AI10+ signals, an RB-pin of the PLC analog unit U3 is connected with AI 10-signals, the part is used for collecting tap water pressure signals, an RC pin and a C+ pin of the PLC analog unit U3 are connected with AI12+ signals, and an RC-pin of the PLC analog unit U3 is connected with AI 12-signals, and the part is used for collecting water supply signals;
The PLC module further comprises a PLC analog unit U4, wherein an L+ pin and an M pin of the PLC analog unit U4 are respectively connected with a +24V line and a 0V line, the part is used for a power supply of the PLC analog unit U4, an AQ 4-signal is connected to the M0 pin of the PLC analog unit U4, an AQ4+ signal is connected to the I0 pin of the PLC analog unit U4, the part is used for outputting a 2# water pump motor M2 frequency signal, an AQ 6-signal is connected to the M1 pin of the PLC analog unit U4, an AQ6+ signal is connected to the I0 pin, and the part is used for outputting a 3# water pump motor M3 frequency signal;
the motor driving module comprises a 1# water pump motor frequency converter T1, a 2# water pump motor frequency converter T2 and a 3# water pump motor frequency converter T3, wherein an R pin, an S pin and a T pin of the 1# water pump motor frequency converter T1 are respectively connected with an L1 line, an L2 line and an L3 line, the part is used for providing power for the 1# water pump motor frequency converter T1, a U pin, a V pin and a W pin of the 1# water pump motor frequency converter T1 are connected with a 1# water pump motor M1, a DI1 pin of the 1# water pump motor frequency converter T1 is connected with one end of an intermediate relay KA1, the other end of the intermediate relay KA1 is connected with a COM pin of the 1# water pump motor frequency converter T1, an AI1 pin of the 1# water pump motor frequency converter T1 is connected with an AQ0+ signal of a PLC analog unit U2, a 1# GND pin of the 1# water pump motor frequency converter T1 is connected with an AQ 0-signal of the PLC analog unit U2, a 1# GND pin of the 1# water pump motor frequency converter T1 is connected with an analog unit U2, and the AI 1# water pump frequency converter is connected with the PLC unit 1-GND 1;
The R pin, the S pin and the T pin of the 2# water pump motor frequency converter T2 are respectively connected with an L1 line, an L2 line and an L3 line, the part is used for providing power for the 2# water pump motor frequency converter T2, the U pin, the V pin and the W pin of the 2# water pump motor frequency converter T2 are connected with a 2# water pump motor M2, the DI1 pin of the 2# water pump motor frequency converter T2 is connected with one end of an intermediate relay KA2, the other end of the intermediate relay KA2 is connected with the COM pin of the 2# water pump motor frequency converter T2, the AI1 pin of the 2# water pump motor frequency converter T2 is connected with an AQ4+ signal of a PLC analog unit U4, the 1 pin of the 2# water pump motor frequency converter T2 is connected with an AI2+ signal of the PLC analog unit U2, the 2 pin of the 2# water pump motor frequency converter T2 is connected with an AI2+ signal of the PLC analog unit U2, and the AI 2# water pump motor frequency converter T2 is used for controlling the running speed of the water pump motor in the part and the running direction of the PLC 2;
r foot, S foot, the T foot of 3# water pump motor converter T3 are connected with L1 line, L2 line, L3 line respectively, and this part is used for 3# water pump motor converter T3 ' S power, 3# water pump motor M3 is connected to 3# water pump motor converter T3 ' S U foot, V foot, W foot, 3# water pump motor converter T3 ' S DI1 foot is connected with the one end of intermediate relay KA3, and 3# water pump motor converter T3 ' S COM foot is connected to intermediate relay KA3 ' S the other end, 3# water pump motor converter T3 ' S AI1 foot is connected with PLC analog unit U4 ' S AQ6+ signal, 3# water pump motor converter T3 ' S1 # GND foot is connected with PLC analog unit U4 ' S AQ6-signal, 3# water pump motor converter T3 ' S AO1 foot is connected with PLC analog unit U2 ' S AI4+ signal, 3# water pump motor converter T3 ' S2 GND foot is connected with the one end of analog unit U2, this 3# water pump motor M3 ' S2 of AI 6-signal, and this 3# water pump motor operation direction control is used for controlling with 3# water pump operation.
2. The realization method of the automatic switching non-negative pressure water supply system is characterized by comprising the following steps of: the implementation method is applied to the automatic switching non-negative pressure water supply system as claimed in claim 1, and comprises the following steps:
the working procedure starts in step S100, and the procedure starts and step S101 is executed;
step S101, the control system judges whether the running water pressure meets the equipment starting signal, if yes, the step S102 is executed; if not, executing step S103;
step S102, starting a No. 2 pneumatic valve, and closing the No. 1 pneumatic valve and the No. 3 pneumatic valve; step S104 is executed;
step S103, starting the 1# pneumatic valve and the 3# pneumatic valve, closing the 2# pneumatic valve and the 4# pneumatic valve, and closing the 1# water pump motor M1; step S104 is executed;
step S104, starting a No. 2 water pump motor M2; step S105 is performed;
step S105, the control system judges whether the water supply pressure meets the water supply requirement; if yes, the program jumps to the program starting S101, if not, the step S106 is executed;
step S106, starting a 3# water pump motor M3; jumping to the starting position S101 of the program, and repeating the steps;
the water replenishing and circulating process of the water storage tank starts in step S200, the process starts, and step S201 is executed;
step S201, the control system judges whether the liquid level of the water storage tank reaches the set liquid level, if so, the step S202 is executed; if not, executing step S203;
Step S202, a motor M1 of a No. 1 water pump is started, a No. 1 pneumatic valve and a No. 3 pneumatic valve are closed, and a No. 4 pneumatic valve is opened; the program jumps to the program start S201;
step S203, the motor M1 of the No. 1 water pump is closed, the No. 3 pneumatic valve and the No. 4 pneumatic valve are closed, and the No. 1 pneumatic valve is opened; step S204 is executed;
step S204, the control system judges whether the running water pressure meets the equipment starting signal; if yes, the program jumps to the program start S201; if not, go to step S205;
step S205, closing the No. 1 pneumatic valve, and waiting for the increase of tap water pressure; the process jumps to the process start S204; this is repeated.
CN202210650699.0A 2022-06-09 2022-06-09 Automatic-switching negative-pressure-free water supply system and implementation method thereof Active CN114922254B (en)

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