CN216848556U

CN216848556U - Automatic drainage device

Info

Publication number: CN216848556U
Application number: CN202123240509.8U
Authority: CN
Inventors: 颉永鹏; 崔泽群; 王亚淑; 曹志辉
Original assignee: Avic Tianshui Aviation Industry Co ltd
Current assignee: Avic Tianshui Aviation Industry Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-06-28
Anticipated expiration: 2031-12-22

Abstract

The utility model provides an automatic drainage device, which comprises a submersible pump, a liquid level switch, a pressure sensor, a human-computer interface, a control button and a control circuit; the water level is detected through the liquid level switch, and the PLC executes whether to start and stop the equipment according to the program and the water level; the utility model discloses a set up two way drive circuit, utilize the immersible pump positive and negative water pressure value to be inequality principle, confirm that the big return circuit of pressure value is the positive rotation return circuit; the PLC can automatically start alarm reminding and HMI abnormity reminding according to the detection result of the input end, indicate the maintenance position, timely refer to maintenance, remove abnormity and recover to be normal.

Description

Automatic drainage device

Technical Field

The utility model relates to an automatic control field specifically is an automatic drainage device.

Background

In the drainage automatic control technical field, some drainage is manual operation, if meet emergency, like heavy rain ponding, the night rain ponding is too much the situation, manual operation can produce unnecessary problem because of each factor changes, and the drainage of forceful electric power water level control can imply the safety problem again, transships to the motor in addition, the short circuit can exist the condition that can not in time alarm warning remind, to using the maintenance unfavorable etc..

Disclosure of Invention

In order to solve the problems existing in the prior art, the utility model provides an automatic drainage device, including HMI, PLC, phase sequence protector, DC 24V switching power supply, auxiliary relay, contactor, thermal relay, immersible pump, pipeline, liquid level switch, empty switch, knob switch, pilot lamp, inching button switch, water pressure switch, connect AC 380V power L1, L2, L3 respectively with phase sequence protector 1, 2, 3 terminal, normally closed connection control contactor return circuit and KA3 phase sequence protection PLC sampling return circuit, the float switch carries out water level detection through DC 24V voltage, the float switch volume of water level is spread into PLC, PLC carries out whether to start, stop equipment according to the program and the switching state that the water pressure switch spreads into, confirm that the motor is just reversing, transfer to the corotation for the first time, mark, all move in the return circuit thereafter (maintenance replacement motor, that also needs debugging), HMI real-time display each input, output state that PLC obtained simultaneously to can touch each touch switch who sets up, if motor overload, short circuit appear in pump body motor operation process simultaneously, the motor burns out and can not draw water, PLC is according to inputing auto-stop, output warning, suggestion inspection motor problem etc.. The utility model relates to a rationally, easy operation is convenient, has solved the problem that drainage (flood season too much ponding or various return ponds manual work draw water etc.) unmanned on duty automatic pumping, has still avoided the hidden safety problem of early use forceful electric power water level control to and pump body motor overload, short circuit, burn out autoalarm and remind convenient to use maintenance scheduling problem, the phase sequence protection prevents that the motor from crossing undervoltage start-up, the wrong phase operation, and in time report to the police and instruct, the problem of being convenient for is seeked and is maintained.

The technical scheme of the utility model is that:

an automatic drainage device comprises a submersible pump, a liquid level switch, a pressure sensor, a human-computer interface, a control button and a control circuit;

the control button comprises an automatic/manual position shifting switch, a jog button switch, a first driving circuit switch and a second driving circuit switch;

the control circuit comprises a Programmable Logic Controller (PLC), a phase sequence protector, two groups of air switches, three groups of intermediate relays, two groups of contactors, a thermal relay and a control switch power supply;

the external alternating current power supply is connected with the input terminal of the phase sequence protector; an external alternating current power supply supplies power to the Programmable Logic Controller (PLC) through the air switch QF 2; an external alternating current power supply is connected with normally open contacts of the contactor KM1 and the contactor KM2 through the air switch QF1, and the normally open contacts of the contactor KM1 and the contactor KM2 are connected with the submersible pump through a thermal relay;

the PLC provides display data signals for a human-computer interface, and is also connected with corresponding indicator lamps, an alarm, an intermediate relay KA1, coils of an intermediate relay KA2 and normally closed contacts through a control switch power supply; the coil and the normally closed contact of the intermediate relay KA1 and the intermediate relay KA2 are arranged in an interlocking mode;

the normally closed contact of the contactor KM1, the normally open contact of the intermediate relay KA2 and the coil of the contactor KM2 are connected in series to form a path, the normally closed contact of the contactor KM2, the normally open contact of the intermediate relay KA1 and the coil of the contactor KM1 are connected in series to form a path, and the two paths are connected in parallel with the coil of the intermediate relay KA3 and are connected to the normally closed loop terminal of the phase sequence protector together.

Advantageous effects

The utility model has the advantages of it is following:

1. the liquid level switch detects the water level, and the PLC executes whether to start and stop the equipment according to the program and the detected water level;

2. the method comprises the steps that when the submersible pump runs for the first time, the problem of forward and reverse rotation is involved, two driving loops are arranged, because the forward and reverse rotation water pressure values of the submersible pump are different, the pump runs for the first time, forward and reverse rotation water pressure values are measured by a digital display pressure switch for 2-3 minutes respectively, then parameters larger than the reverse rotation water pressure value are set as the output value of the forward rotation pressure switch (the output setting of the digital display pressure switch), the pressure value large loop is started, the PLC obtains the input of the pressure switch, namely the forward rotation state of the pump is determined, namely the forward rotation loop in the two loops is determined;

3. the human-computer interface displays the water level and the running and stopping states of the equipment in real time, and can also operate and control the running and stopping of the equipment, consult the states of I/O ports, alarm records, monitor running dynamic pictures of the equipment and the like;

4, automatically starting alarm reminding and HMI abnormity reminding by the PLC according to the detection result of the input end, indicating the maintenance position, referring to maintenance in time, removing abnormity and recovering to be normal;

5. the phase sequence protection prevents the motor from being started under voltage, and prevents the motor from operating in a phase-staggered or phase-losing way.

The utility model relates to a rationally, through PLC control, can realize reliable and stable control, the motor is just reversing to judge can reliably confirm that the motor moves in the corotation state, and the continuation of this state has been consolidated in the phase sequence protection to its circuit is simple, and is reliable, and HMI shows that control is directly perceived clear, and the image is lifelike, and simulation actual scene is strong, has greatly realized industrial automation control and off-site monitoring, has promoted characteristics such as industrial automation management widely.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The following detailed description of embodiments of the invention is intended to be illustrative, and not to be construed as limiting the invention.

As shown in fig. 1, the automatic water discharging device in this embodiment includes a submersible pump, liquid level switches (high liquid level switch and low liquid level switch), a pressure sensor (pressure switch), a human-computer interface, a control button, and a control circuit.

The control button comprises an automatic/manual position shifting switch, a inching button switch (comprising manual starting, manual stopping and resetting), a first driving circuit switch and a second driving circuit switch.

The control circuit comprises a Programmable Logic Controller (PLC), a phase sequence protector, two groups of air switches, three groups of intermediate relays, two groups of contactors, a thermal relay and a Direct Current (DC) 24V switching power supply.

The three phases of the external AC 380V power supplies L1, L2 and L3 are respectively connected with the 1, 2 and 3 terminals of the phase sequence protector. One phase of an external AC 380V power supply supplies power to the PLC through the air switch QF 2; the three-phase of an external AC 380V power supply is connected with normally open contacts of a contactor KM1 and a contactor KM2 which are connected in parallel through an air switch QF1, and then is connected with a submersible pump through a thermal relay.

The PLC provides display data signals for a human-computer interface, and is also connected with corresponding indicator lamps, alarms and coils and normally closed contacts of the intermediate relays KA1 and KA2 through a DC 24V switch power supply; the coils and the normally closed contacts of the intermediate relays KA1 and KA2 are arranged in an interlocking mode; the indicating lamp comprises a phase sequence protection indicating lamp, a pressure indicating lamp, a first driving circuit indicating lamp and a second driving circuit indicating lamp.

The normally closed contact of the contactor KM1, the normally open contact of the intermediate relay KA2 and the coil of the contactor KM2 are connected in series to form a path, the normally closed contact of the contactor KM2, the normally open contact of the intermediate relay KA1 and the coil of the contactor KM1 are connected in series to form a path, and the two paths are connected in parallel with the coil of the intermediate relay KA3 and are connected to the normally closed loop terminal 6 of the phase sequence protector together. If the phase sequence and the voltage of the AC 380V power supply are normal, the loops of the contactors KM1, KM2 and the intermediate relay KA3 are normally electrified, so that a normal signal can be provided for the PLC, and the normally open contact of the contactor KM1 and the normally open contact of the contactor KM2 in the main control loop can be controlled. The coil of the intermediate relay KA3 is connected with the normally closed loop terminal 6 of the phase sequence protector and is used for giving a phase sequence protection alarm to the programmable controller PLC, because the normally closed contact of the intermediate relay KA3 is connected with the programmable controller PLC, if the AC 380V power supply phase sequence voltage is abnormal, undervoltage, open phase or wrong phase, the coil of the intermediate relay KA3 is powered off, the contact of the KA3 is normally closed, so that a signal is sent to the programmable controller PLC, and the alarm connected to the programmable controller PLC sends an alarm signal.

Because when the submersible pump runs for the first time (including installation and debugging after maintenance), how the first driving circuit and the second driving circuit correspond to the positive and negative rotation of the submersible pump is unclear, the manual gear is selected through the rotary switch for debugging:

pressing first drive circuit switch, first drive circuit pilot lamp is lighted, and first drive circuit puts into operation, and weak current circuit is: DC +24V → KA2 normally closed contact → KA1 coil → PLC corresponding output point → PLC common end COM → 0V forms weak current control loop, KA1 normally open contact is attracted; the strong current AC 380V circuit is: the normally closed loop terminal of the phase sequence protector 6 → KM2 normally closed contact → KA1 normally open contact → KM1 coil → zero line form a strong current control loop of KM1, the KM1 normally open contact is closed, AC 380V switches on the submersible pump through KM1, the submersible pump is electrified and operated, after 2 minutes left and right (after pressure is stabilized), the pressure value measured by the pressure switch is checked, manual stop is pressed again, and the first driving loop stops.

Pressing the second driving circuit switch, the second driving circuit indicator lamp lights, the second driving circuit is put into operation, the weak current circuit is: DC +24V → KA1 normally closed contact → KA2 coil → PLC corresponding output point → PLC common end COM → 0V forms weak current control loop, KA2 normally open contact is attracted; the strong current AC 380V circuit is: the normally closed loop terminal of the phase sequence protector 6 → KM1 normally closed contact → KA2 normally open contact → KM2 coil → zero line form a strong current control loop of KM2, KM2 normally open contact is attracted, AC 380V switches on the submersible pump through KM2, the submersible pump is electrified and operated, after 2 minutes left and right (after pressure is stabilized), the pressure value measured by the pressure switch is checked, manual stop is pressed, and the second driving loop stops.

The driving circuit with high water pressure is determined to be a forward rotation circuit because the forward rotation water pressure and the reverse rotation water pressure of the submersible pump are different. When carrying out automatic control, press the drive circuit switch of the big drive circuit of water pressure to set for pressure sensor's output pressure value, select the automatic fender with rotary switch, the system is in automatic state, and floater liquid level switch carries out the water level in real time and examines and examine, and spreads into programmable logic controller PLC with water level information into, all has water when low liquid level and high liquid level position, and high liquid level switch and low liquid level switch are all closed. The PLC executes output according to a program and an input switch state, attracts and closes an intermediate relay in the forward rotation loop, the intermediate relay controls the attraction contactor again, the two loops are interlocked, misoperation is prevented, and the pump body is started to operate and pump water; when high-level water is pumped out, the high liquid level switch is triggered, and a large amount of water is left between the high level and the low level, the pump continues pumping water until the low-level water is pumped out, the low liquid level switch is triggered, the PLC stops outputting, and the pump stops pumping water; if the water is continuously increased, when the high and low liquid levels have water, the PLC outputs the water, and the water pumping is executed in cycles.

Meanwhile, a corotation loop is selected, a corresponding driving loop indicator lamp is lightened to indicate that the current running loop is the corotation loop, the PLC detects whether the cable and the submersible pump motor have abnormal conditions such as overload, short circuit and burnout through a thermal relay, judges the cable break and the pump burnout by combining the running state and the output of a pressure switch, timely cuts off the running of equipment, alarms through an alarm to remind that the abnormal conditions occur, a man-machine interface also displays alarm content in real time to guide workers to check or overhaul corresponding positions, and when the normal state is recovered, the PLC resets and removes the alarm. The human-computer interface not only has a main scene of the scene automatic running cartoon simulating the running of the equipment, but also monitors various state pictures, manual pictures, alarm pictures and the like of the I/O end, displays the transmitted information and the running condition of the equipment in real time, and intuitively and clearly displays various conditions which need to be known and mastered by observers. The touch button switch arranged in the human-computer interface can also execute the interfaces of starting and stopping equipment, page jump, information inquiry, I/O port state, alarm information, automatic operation animation display and the like, and phase sequence protection can prevent over-voltage and under-voltage starting, phase error and phase failure operation, effectively protect a water pump motor and prevent the problem of phase inversion.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. An automatic drainage device, its characterized in that: the device comprises a submersible pump, a liquid level switch, a pressure sensor, a human-computer interface, a control button and a control circuit;

the control button comprises an automatic/manual position shifting switch, a jog button switch, a first driving loop switch and a second driving loop switch;

the PLC provides a display data signal for a human-computer interface, and is also connected with a corresponding indicator lamp, an alarm, an intermediate relay KA1, a coil of the intermediate relay KA2 and a normally closed contact through a control switch power supply; the coil and the normally closed contact of the intermediate relay KA1 and the intermediate relay KA2 are arranged in an interlocking mode;

2. The automatic water discharge device according to claim 1, wherein: the indicating lamp comprises a phase sequence protection indicating lamp, a pressure indicating lamp, a first driving circuit indicating lamp and a second driving circuit indicating lamp.

3. The automatic water discharge device according to claim 1, wherein: when the phase sequence and the voltage of an external alternating-current power supply are normal, the loops of the contactor KM1, the contactor KM2 and the intermediate relay KA3 are normally electrified, normal signals can be provided for the PLC, and the normally open contact of the contactor KM1 and the normally open contact of the contactor KM2 in the main control loop can be controlled.

4. The automatic water discharge device according to claim 1, wherein: an intermediate relay KA3 coil is connected with a normally closed loop terminal of the phase sequence protector, and a normally closed contact of the intermediate relay KA3 is connected with the programmable logic controller PLC, so that phase sequence protection alarm is realized for the programmable logic controller PLC.

5. The automatic water discharge device according to claim 1, wherein: during manual control: when pressing first drive circuit switch, first drive circuit pilot lamp is lighted, and first drive circuit puts into operation, and weak current circuit is: DC +24V → KA2 normally closed contact → KA1 coil → PLC corresponding output point → PLC common end COM → 0V forms weak current control loop, KA1 normally open contact is attracted; the strong current circuit is: the normally closed loop terminal 6 of the phase sequence protector → the KM2 normally closed contact → the KA1 normally open contact → the KM1 coil → the zero line forms a strong current control loop of KM1, the KM1 normally open contact is closed, an external alternating current power supply is connected with a submersible pump through KM1, the submersible pump is electrified and operated, and the measured pressure value is checked after the pressure sensor is stabilized;

when pressing second drive circuit switch, the second drive circuit pilot lamp is lighted, and second drive circuit puts into operation, and weak current circuit is: DC +24V → KA1 normally closed contact → KA2 coil → PLC corresponding output point → PLC common end COM → 0V forms weak current control loop, KA2 normally open contact is attracted; the strong electric circuit is: the normally closed loop terminal of the phase sequence protector → the KM1 normally closed contact → the KA2 normally open contact → the KM2 coil → the zero line forms a strong current control loop of KM2, the KM2 normally open contact is attracted, an external alternating current power supply is connected with a submersible pump through KM2, the submersible pump is electrified and operated, and the measured pressure value is checked after the pressure sensor is stabilized.