CN108799086B - Automatic inspection device and system for water pump - Google Patents
Automatic inspection device and system for water pump Download PDFInfo
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- CN108799086B CN108799086B CN201810841647.5A CN201810841647A CN108799086B CN 108799086 B CN108799086 B CN 108799086B CN 201810841647 A CN201810841647 A CN 201810841647A CN 108799086 B CN108799086 B CN 108799086B
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- relay
- water pump
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- contactor
- open contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an automatic water pump inspection device which comprises a PLC controller, a frequency converter BP, a relay KA5 and control circuits, wherein the quantity of the control circuits is equal to that of water pumps M1 to be inspected and the control circuits correspond to each other one by one; the control circuit comprises a change-over switch SA, an emergency stop button 1SB2, a start button 1SB1, a contactor KM1, a time relay KT1, a contactor KM31 and a relay KA11; the water pumps M1 are electrically connected with a three-phase power supply through normally open contacts KM1-1 of corresponding contactors KM1, each water pump M1 is electrically connected with the frequency converter BP through normally open contacts KM31-1 of corresponding contactors KM31, the frequency converter BP is electrically connected with the three-phase power supply, and normally open contacts KA5-2 of the relay KA5 are electrically connected with an operation control end of the frequency converter BP; and the relays KA11 corresponding to the pumps are respectively and electrically connected with the PLC, and the control circuit is electrically connected with the PLC. The invention can realize the automatic high-efficiency inspection of the water pump, and the running of the water pump is not in conflict with the inspection.
Description
Technical Field
The invention relates to the technical field of water pump inspection, in particular to an automatic water pump inspection device and system.
Background
In the prior art, the inspection of the water pump is generally manually performed by inspection personnel, so that the inspection efficiency is low, the normal operation of the water pump is influenced, the workload is large, the inspection omission and the false inspection are easy to occur, and a large amount of manpower and material resources are wasted.
Disclosure of Invention
The invention aims to overcome the technical defects, and provides an automatic water pump inspection device which solves the technical problems that in the prior art, the water pump inspection efficiency is low, the normal operation of the water pump is influenced, and manpower and material resources are wasted.
In order to achieve the technical purpose, the technical scheme of the invention provides an automatic water pump inspection device, which comprises a PLC controller, a frequency converter BP, a relay KA5 and control circuits, wherein the quantity of the control circuits is equal to that of water pumps M1 to be inspected and corresponds to that of the water pumps M1 to be inspected one by one; the control circuit comprises a change-over switch SA, an emergency stop button 1SB2, a start button 1SB1, a contactor KM1, a time relay KT1, a contactor KM31 and a relay KA11;
the water pumps M1 are electrically connected with a three-phase power supply through normally open contacts KM1-1 of corresponding contactors KM1, each water pump M1 is electrically connected with the frequency converter BP through normally open contacts KM31-1 of corresponding contactors KM31, the frequency converter BP is electrically connected with the three-phase power supply, and normally open contacts KA5-2 of the relay KA5 are electrically connected with an operation control end of the frequency converter BP;
the first contact, the emergency stop button 1SB2, the starting button 1SB1 and the contactor KM1 of the change-over switch SA are connected in series between a live wire X1 and a zero line N to form a manual branch, a normally open contact KM1-2 of the contactor KM1 is connected in parallel with the starting button 1SB1, a normally open contact KA11-1 of the relay KA11-1 and a second contact of the change-over switch SA are sequentially connected in series between one end of the electric connection of the starting button 1SB1 and the contactor KM1 and the live wire X1, the second contact of the change-over switch SA is sequentially connected with the zero line N through a normally open contact KA5-1 of the relay KA5 and a time relay KT1, and the second contact of the change-over switch SA is also connected with the zero line N through a normally open contact KT1-1 of the time relay KT1, a normally open contact KM1-3 of the contactor KM1 and a contactor 31;
the relays KA11 corresponding to the pumps are respectively and electrically connected with the PLC, and the second contact of the transfer switch SA, the normally open contact KM1-4 of the contactor KM1 and the normally open contact KM31-2 of the contactor KM31 are respectively and electrically connected with the PLC.
The invention also provides an automatic water pump inspection system, which comprises a monitoring terminal, a communication circuit and a plurality of automatic water pump inspection devices, wherein each automatic water pump inspection device is arranged at each water pump well, and each automatic water pump inspection device is connected with the monitoring terminal through the communication circuit.
Compared with the prior art, the invention has the beneficial effects that: the invention sets up converter BP and PLC controller, realize the low-frequency operation of the water pump M1 through converter BP and PLC controller, thus realize the automatic process of patrolling and examining of all M1 of the water pump, detect the working condition of the water pump M1 through PLC controller at the same time, when the water pump M1 is in the working condition, the PLC controller controls the converter BP to stop running, avoid patrolling and examining the normal work of the water pump M1 of process influence, the invention has the technical effects that patrolling and examining the efficiency is high, the water pump patrols and examines and does not conflict with water pump work.
Drawings
Fig. 1 is a circuit diagram of a frequency converter and a water pump of the automatic water pump inspection device provided by the invention;
fig. 2 is a circuit diagram of a control circuit of the automatic inspection device for the water pump;
FIG. 3 is a circuit diagram of a PLC controller of the automatic water pump inspection device provided by the invention;
FIG. 4 is a circuit diagram of a pump protector KZ1 of the automatic water pump inspection device provided by the invention;
FIG. 5 is a circuit diagram of a frequency converter monitoring circuit of the automatic water pump inspection device provided by the invention;
FIG. 6 is a circuit diagram of a water level monitoring circuit of the automatic water pump inspection device provided by the invention;
FIG. 7 is a schematic diagram of an installation structure of the automatic inspection device of the water pump;
fig. 8 is a working schematic diagram of the automatic inspection system of the water pump.
Reference numerals:
1. the automatic inspection device comprises a PLC controller, 2, a control circuit, 3, an installation box, 4, an installation plate, 100, a water pump automatic inspection device, 200, a communication circuit, 300 and a monitoring terminal.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1:
as shown in fig. 1-3, embodiment 1 of the present invention provides an automatic inspection device for a water pump, which includes a PLC controller 1, a frequency converter BP, a relay KA5, and control circuits 2 corresponding to the water pumps M1 to be inspected in a one-to-one correspondence with the same number; the control circuit 2 comprises a change-over switch SA, an emergency stop button 1SB2, a start button 1SB1, a contactor KM1, a time relay KT1, a contactor KM31 and a relay KA11;
as shown in fig. 1, the water pumps M1 are electrically connected with a three-phase power supply through normally open contacts KM1-1 of corresponding contactors KM1, each water pump M1 is electrically connected with the frequency converter BP through normally open contacts KM31-1 of corresponding contactors KM31, the frequency converter BP is electrically connected with the three-phase power supply, and normally open contacts KA5-2 of the relay KA5 are electrically connected with an operation control end of the frequency converter BP;
as shown in fig. 2, a first contact, an emergency stop button 1SB2, a start button 1SB1 and a contactor KM1 of the switch SA are connected in series between a live wire X1 and a zero line N to form a manual branch, a normally open contact KM1-2 of the contactor KM1 is connected in parallel with the start button 1SB1, a normally open contact KA11-1 of the relay KA11-1 and a second contact of the switch SA are connected in series in sequence between one end of the start button 1SB1 electrically connected with the contactor KM1 and the live wire X1, the second contact of the switch SA is connected in sequence with the zero line N through a normally open contact KA5-1 of the relay KA5 and a time relay KT1, and the second contact of the switch SA is also connected with the zero line N through a normally open contact KT1-1 of the time relay KT1, a normally open contact KM1-3 of the contactor KM1 and a contactor KM 31;
as shown in fig. 3, the relays KA11 corresponding to the pumps of the pairs are respectively electrically connected to the PLC controller 1, and the second contact of the changeover switch SA, the normally open contact KM1-4 of the contactor KM1, and the normally open contact KM31-2 of the contactor KM31 are respectively electrically connected to the PLC controller 1.
Specifically, only two water pumps M1 are shown in fig. 1, and this embodiment only uses two water pumps M1 as an example, and it is obvious that the number of water pumps M1 may be other. Only one control circuit 2 is shown in fig. 2, all the control circuits 2 of the water pumps are identical, and all the control circuits 2 of the water pumps are not shown in fig. 2.
Specifically, as shown in fig. 1, a breaker QF1 is further connected in series between the water pump M1 and the three-phase power supply, and a breaker QF2 is further connected in series between the frequency converter BP and the three-phase power supply, wherein the breaker QF1 and the breaker QF2 respectively realize the safety on-off protection of the water pump M1 and the frequency converter BP. Specifically, as shown in fig. 2, a fuse FU1 is connected in series between the first contact of the switch SA and the live wire X1, and the fuse FU1 protects the control circuit 2.
The invention provides an automatic inspection device for a water pump, which has the following working principle: the first contact of the change-over switch SA corresponds to a manual gear and the second contact corresponds to an automatic gear.
When the change-over switch SA is in a manual gear, the PLC controller 1 and the control circuit 2 cannot control the water pump M1, the water pump M1 can be started only by pressing the starting button 1SB1, the normally open contact KM1-2 of the contactor KM1 realizes starting self-holding, and the emergency stop button 1SB2 realizes emergency stop when the water pump M1 fails.
When the change-over switch SA is in an automatic gear, the scram button 1SB2 and the start button 1SB1 do not act any more, and the PLC controller 1 and the control circuit 2 realize the automatic control of the water pump M1 and the frequency converter BP, namely realize the normal operation of the water pump and the automatic control of the inspection. When the inspection is not needed and the water pump is required to normally run, the PLC controller 1 controls the relay KA11 to be powered on, the normally open contact KA11-1 of the relay KA11 is closed, the contactor KM1 is powered on, the normally open contact KM1-1 of the contactor KM1 is closed, and the water pump M1 is electrified to run. When inspection is needed, the PLC controller 1 controls the relay KA5 to be powered on, the normally open contact KA5-1 of the relay KA5 is closed, so that the time relay KT1 is powered on, the normally open contact KT1 of the time relay KT1 is closed after time delay, the contactor KM31 is powered on, the normally open contact KM31-1 of the contactor KM31 is closed, and the power is supplied between the frequency converter BP and the water pump M1; meanwhile, the relay KA5 is powered on to enable the normally open contact KA5-2 to be closed, the frequency converter BP is started, the frequency converter BP controls the water pump M1 to run at a low frequency and a low speed, automatic inspection of the water pump M1 is achieved, the water pump M1 is ensured not to be rusted, meanwhile, the electric loop is enabled to run once in a moving mode, and reliability of the electric loop is ensured. Because the rotating speed is low, the water pump M1 can not discharge water, the power consumption is low, the operation is reliable, and the unattended automatic inspection can be realized. The inspection mode can be set to be periodic inspection, for example, once a day, the inspection is realized through the internal clock control of the PLC controller 1, the control logic is simple, and the inspection is realized by adopting the prior art. The inspection time can be set according to the requirement, for example, ten minutes.
When inspection is needed, the PLC controller 1 controls the relay KA5 to be powered on, and the normally open contact KA5-1 of the relay KA5 is closed, so that the time relay KT1 is powered on, and the normally open contact KT1 of the time relay KT1 is closed after time delay; at this time, if the water pump M1 is in an operation state, the contactor KM1 is electrified, the normally closed contacts KM1-3 of the contactor KM1 are disconnected, the contactor KM31 cannot be electrified, and the frequency converter BP and the water pump M1 cannot be electrified, so that inspection is performed during operation of the water pump M1, normal operation of the water pump M1 is ensured, and conflict between operation and inspection of the water pump M1 is avoided. When the inspection fails, the next inspection is performed after a certain time delay until the inspection is successful.
The automatic water pump inspection device provided by the invention can realize low-frequency low-speed automatic inspection of the water pump M1, realize unattended safe inspection, and has high inspection efficiency without manual operation. Meanwhile, the normal operation of the water pump M1 is ensured, and the mutual conflict between the operation of the water pump M1 and the inspection is avoided.
Preferably, as shown in fig. 1 and 2, a thermal relay KH1 is further connected in series between the water pump M1 and the three-phase power supply, a normally open contact KH1-1 of the thermal relay KH1 is connected in series with a relay KA12 and then connected in parallel with the manual branch, a normally closed contact KA12-1 of the relay KA12 is connected in series between the start button 1SB1 and the contactor KM1, and a normally open contact KA12-2 of the relay KA12 is electrically connected with the PLC controller 1.
And a thermal relay KH1 is arranged, so that overload automatic power-off of the water pump M1 is realized, and the water pump M1 is protected. Meanwhile, when the water pump M1 is overloaded, the thermal relay KH1 is powered on, the normally open contact KH1-1 of the thermal relay KH1 is closed, so that the relay KA12 is powered on, the normally closed contact KA12-1 of the relay KA12 is opened, the contactor KM1 is powered off, the normally open contact KM1-1 of the contactor KM1 is opened, the water pump M1 is powered off and stops running, the water pump M1 is further ensured to be automatically powered off when overloaded, and meanwhile, an overload signal of the water pump M1 is sent to the PLC controller 1 through the normally open contact KA12-2 of the relay KA12, so that the overload monitoring of the water pump M1 is realized.
Preferably, as shown in fig. 2, the normally open contact KA12-3 of the relay KA12 is connected in series with the alarm lamp 1HY and then connected in parallel with the manual bypass.
When the water pump M1 is overloaded, the thermal relay KH1 is powered on, the normally open contact KH1-1 of the thermal relay KH1 is closed, so that the relay KA12 is powered on, the normally open contact KA12-3 of the relay KA12 is closed, the alarm lamp 1HY is turned on, the overload of the water pump M1 is indicated, and a worker is prompted to overhaul.
Preferably, as shown in fig. 2, the normally open contact KM1-5 of the contactor KM1 is connected in series with the indicator lamp 1HR and then connected in parallel with the manual branch, and the normally closed contact KM1-6 of the contactor KM1 is connected in series with the indicator lamp 1HG and then connected in parallel with the manual branch.
When the water pump M1 is electrified to run, the contactor KM1 is electrified, normally open contacts KM1-5 of the contactor KM1 are closed, and the indicator lamp 1HR is turned on to indicate that the water pump M1 is in a running state. When the water pump M1 is powered off and stops running, the contactor KM1 is powered off, normally open contacts KM1-6 of the contactor KM1 are closed, the indicator lamp 1HG is turned on, and the water pump M1 is indicated to be in a stop state.
Preferably, as shown in fig. 4, the upper cover of the water pump M1 is provided with a pump protector KZ1, the alarm signal output end of the pump protector KZ1 is connected with a zero line N through an alarm lamp HY1, the fault signal output end of the pump protector KZ1 is connected with the zero line N through a relay KA13, a normally closed contact KA13-1 of the relay KA13 is connected in series between the start button 1SB1 and the contactor KM1, and a normally closed contact KA13-2 of the relay KA13 is electrically connected with the PLC controller 1.
The pump protector KZ1 is additionally arranged to protect the water pump M1, the pump protector M1 is realized by adopting the pump protector in the prior art, the pump protector KZ1 adopted in the embodiment comprises four sensors BR, the four sensors BR are respectively used for detecting water leakage signals of an oil chamber, water leakage signals of a wire box, overheat signals of windings and overtemperature signals of a bearing, four alarm signals corresponding to the four sensors BR of the pump protector KZ1 are connected with a zero line N through an alarm lamp HY1, and when any one of the signals detected by the four sensors BR reaches an alarm threshold value, the alarm lamp HY1 is lightened to prompt a worker that the water pump M1 works abnormally. Meanwhile, a fault signal of the pump protector KZ1 is detected through the relay KA13, when the pump protector KZ1 breaks down, the contactor KM1 loses electricity, the normally open contact KM1-1 of the contactor KM1 is disconnected, and the water pump M1 stops running when the power is off. The working personnel can conveniently carry out fault maintenance, and the protection water pump M1 can not operate when the pump protector KZ1 fails. Meanwhile, the normally closed contact KA13-2 of the relay KA13 sends a fault signal of the pump protector KZ1 to the PLC controller 1, so that the PLC controller 1 monitors the fault signal of the pump protector KZ 1.
Preferably, as shown in fig. 5, the control circuit 2 further includes a frequency converter monitoring circuit, the frequency converter monitoring circuit includes a relay KA6 and a relay KA7, an operation signal output end of the frequency converter BP is connected to a zero line N through the relay KA6, a fault signal output end of the frequency converter BP is connected to the zero line N through the relay KA7, a normally open contact KA6-1 of the relay KA6 and a normally open contact KA7-1 of the relay KA7 are respectively electrically connected with the PLC controller 1, and a normally closed contact KA7-2 of the relay KA7 is connected in series between a normally open contact KA5-1 of the relay KA5 and the time relay KT 1.
The monitoring of the running state and fault signals of the frequency converter BP is achieved through the relay KA6 and the relay KA7, and the normally open contact KA6-1 of the relay KA6 and the normally open contact KA7-1 of the relay KA7 respectively send the running state and the fault signals of the frequency converter BP to the PLC controller 1, so that the PLC controller 1 monitors the frequency converter BP. When the frequency converter BP breaks down, the relay KA7 is powered on, the normally closed contact KA7-2 of the relay KA7 is disconnected, the time relay KT1 is powered off, the normally open contact KT1 of the time relay KT1 is disconnected, the contactor KM31 is powered off, the normally open contact KM31-1 of the contactor KM31 is disconnected, the frequency converter BP is electrically disconnected from the water pump M1, automatic isolation of the frequency converter BP faults is achieved, and the influence on the water pump M1 when the frequency converter BP breaks down is avoided.
Preferably, as shown in fig. 5, the frequency converter monitoring circuit further includes an indicator lamp HR, an indicator lamp HG and an indicator lamp HY, and the normally open contact KA6-2 of the relay KA6 is connected in series with the indicator lamp HR and then connected in parallel with the manual branch, the normally closed contact KA6-3 of the relay KA6 is connected in series with the indicator lamp HG and then connected in parallel with the manual branch, and the normally open contact KA7-3 of the relay KA7 is connected in parallel with the indicator lamp HY and then connected in parallel with the manual branch.
When the frequency converter BP operates, the indicator lamp HR is turned on, the indicator lamp HG is turned off, and the normal operation of the frequency converter BP is indicated; when the frequency converter BP stops running, the indicator lamp HG is turned on, the indicator lamp HR is turned off, and the frequency converter BP is indicated to stop running; when the frequency converter BP fails, the indicator light HY is turned on to prompt the frequency converter BP to fail.
Preferably, the control circuit 2 further includes a water level monitoring circuit, the water level monitoring circuit includes a low water level liquid level switch, a high water level liquid level switch and a plurality of middle water level liquid level switches, the low water level liquid level switch, the high water level liquid level switch and the plurality of middle water level liquid level switches are respectively connected in series with an intermediate relay and then are connected in parallel with the manual branch, a normally closed contact of the intermediate relay corresponding to the low water level liquid level switch is connected in series between the start button 1SB1 and the contactor KM1, a normally open contact of the intermediate relay corresponding to the high water level liquid level switch is connected in series with the alarm lamp HY3 and then is connected in parallel with the manual branch, and normally open contacts of the intermediate relay corresponding to the low water level liquid level switch, the high water level liquid level switch and the plurality of middle water level liquid level switches are respectively connected with the PLC controller 1 electrically.
A water level monitoring circuit is additionally arranged, a plurality of liquid level switches are arranged in the water pump well to monitor the water level in the water pump well, and when the water level in the water pump well is at a low water level, all water pumps are turned off; alarming through an alarm lamp HY3 when the water level in the water pump well is at a high water level; when the water level in the water pump well is at the middle water level, the PLC controller 1 controls the on-off of the relay KA11 corresponding to each water pump to realize the control of the on-off of each water pump, and further realizes the selective energization of the water pumps, controls the number of energized water pumps and realizes the control of the pumping speed.
Specifically, as shown in fig. 6, four liquid level switches are provided in this embodiment, which are a low water level switch BL1, a first intermediate water level switch BL2, a second water level switch BL3, and a high water level switch BL4, where the low water level switch BL1 is connected in series with the relay KA1 and then connected in parallel with the manual branch, the first intermediate water level switch BL2 is connected in series with the relay KA2 and then connected in parallel with the manual branch, the second intermediate water level switch BL3 is connected in series with the relay KA3 and then connected in parallel with the manual branch, and the high water level switch BL4 is connected in series with the relay KA4 and then connected in parallel with the manual branch. The first intermediate water level switch BL2 is at a lower water level than the second intermediate water level switch BL 3. When the water level in the water pump well is at a low water level, the relay KA1 is powered on, normally closed contacts KA1-1 and KA1-2 of the relay KA1 are disconnected, the water pump M1 and the water pump M2 are powered off, and water pumping is stopped; when the water level in the water pump well is at a high water level, the relay KA4 is powered on, the normally open contact KA4-1 of the relay KA4 is closed, and the alarm lamp HY3 is powered on to light up, so that high water level alarm is realized; when the water level in the water pump well is at the first intermediate water level, the relay KA2 is powered on, the PLC controller 1 controls the relay KA11 or the relay KA21 to be powered on, and water is pumped through one water pump; when the water level in the water pump well is at the second intermediate water level, the relay KA3 is powered on, the PLC controller 1 controls the relay KA11 and the relay KA21 to be powered on simultaneously, and water is pumped through the two water pumps.
Specifically, a fuse FU2 is also connected in series between the low water level liquid level switch BL1 and the live wire X1, so as to realize the protection effect on the water level monitoring circuit.
Preferably, as shown in fig. 7, the automatic inspection device for water pump further comprises a mounting box 3 and a mounting plate 4, the PLC controller 1 is mounted in the mounting box 3, the control circuit 2 is disposed on the mounting plate 4, and the mounting plate 4 is detachably inserted into the mounting box 3.
The mounting box 3 has a protective function and protects the PLC controller 1 and the control circuit 2. The mounting plate 4 is in a draw-out and plug-in structure, and the control circuit 2 is arranged in the mounting box 3, so that the later capacity expansion, scheme optimization, modification and maintenance and the like of a user are facilitated. The mounting plate 4 can be detachably inserted into the mounting box 3 by adopting the prior art. The mounting box 3 and the mounting plate 4 are preferably made of waterproof, rust-proof and corrosion-proof materials, for example, steel plates, then galvanized and sprayed with molding powder.
Example 2
As shown in fig. 8, embodiment 2 of the present invention provides an automatic water pump inspection system, which includes a monitoring terminal, a communication circuit, and a plurality of automatic water pump inspection devices provided in any of the foregoing embodiments, where each water pump well is provided with one automatic water pump inspection device, and each automatic water pump inspection device is connected to the monitoring terminal through the communication circuit respectively.
The automatic water pump inspection system provided by the invention comprises the automatic water pump inspection device, so that the automatic water pump inspection device has the technical effects that the automatic water pump inspection system also has, and the detailed description is omitted.
In addition, the automatic water pump inspection system provided by the invention is characterized in that a plurality of automatic water pump inspection devices are connected through the communication circuit to form the Internet of things, the monitoring terminal is used for receiving and monitoring the operation data and inspection data of the automatic water pump inspection devices, and the automatic water pump inspection devices can also communicate to realize data sharing, so that inspection personnel can know the operation and inspection conditions of each water pump M1 in each water pump well only by monitoring the side of the terminal without going to the water pump well, and the monitoring terminal can control each water pump M1. The running state, fault alarm, water level state of the water pump well and automatic inspection working state of each water pump M1 can be transmitted to the monitoring terminal, and meanwhile, the control of the monitoring terminal is received, so that the centralized monitoring and control functions of the whole water pump project are realized.
Specifically, the communication circuit is realized by adopting the prior art, and the communication circuit can be a wireless communication circuit or a wired communication circuit; specifically, as shown in fig. 3, the PLC controller 1 is electrically connected with a communication circuit through a self communication interface RS 485; the monitoring terminal in the invention is realized by adopting the prior art, such as a PC or an industrial personal computer.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (10)
1. The automatic water pump inspection device is characterized by comprising a PLC controller, a frequency converter BP, a relay KA5 and control circuits which are equal in number and in one-to-one correspondence with water pumps M1 to be inspected; the control circuit comprises a change-over switch SA, an emergency stop button 1SB2, a start button 1SB1, a contactor KM1, a time relay KT1, a contactor KM31 and a relay KA11;
the water pumps M1 are electrically connected with a three-phase power supply through normally open contacts KM1-1 of corresponding contactors KM1, each water pump M1 is electrically connected with the frequency converter BP through normally open contacts KM31-1 of corresponding contactors KM31, the frequency converter BP is electrically connected with the three-phase power supply, and normally open contacts KA5-2 of the relay KA5 are electrically connected with an operation control end of the frequency converter BP;
the first contact, the emergency stop button 1SB2, the starting button 1SB1 and the contactor KM1 of the change-over switch SA are connected in series between a live wire X1 and a zero line N to form a manual branch, a normally open contact KM1-2 of the contactor KM1 is connected in parallel with the starting button 1SB1, a normally open contact KA11-1 of the relay KA11-1 and a second contact of the change-over switch SA are sequentially connected in series between one end of the electric connection of the starting button 1SB1 and the contactor KM1 and the live wire X1, the second contact of the change-over switch SA is sequentially connected with the zero line N through a normally open contact KA5-1 of the relay KA5 and a time relay KT1, and the second contact of the change-over switch SA is also connected with the zero line N through a normally open contact KT1-1 of the time relay KT1, a normally open contact KM1-3 of the contactor KM1 and a contactor 31;
the relay KA11 corresponding to each water pump is electrically connected with the PLC controller, and the second contact of the transfer switch SA, the normally open contact KM1-4 of the contactor KM1 and the normally open contact KM31-2 of the contactor KM31 are electrically connected with the PLC controller;
when inspection is needed, the PLC controller controls the relay KA5 to be powered on, the normally open contact KA5-1 of the relay KA5 is closed, so that the time relay KT1 is powered on, the normally open contact KT1 of the time relay KT1 is closed after time delay, the contactor KM31 is powered on, the normally open contact KM31-1 of the contactor KM31 is closed, and the power is conducted between the frequency converter BP and the water pump M1; meanwhile, the relay KA5 is powered on to enable the normally open contact KA5-2 to be closed, the frequency converter BP is started, and the frequency converter BP controls the water pump M1 to run at low frequency and low speed, so that automatic inspection of the water pump M1 is realized;
when the time relay KT1 is powered on, if the water pump M1 is in an operating state, the contactor KM1 is powered on, the normally closed contacts KM1-3 of the contactor KM1 are disconnected, the contactor KM31 cannot be electrified, and the frequency converter BP and the water pump M1 cannot be electrified, so that inspection during operation of the water pump M1 is avoided.
2. The automatic water pump inspection device according to claim 1, wherein a thermal relay KH1 is further connected in series between the water pump M1 and the three-phase power supply, a normally open contact KH1-1 of the thermal relay KH1 is connected in series with a relay KA12 and then connected in parallel with the manual branch, a normally closed contact KA12-1 of the relay KA12 is connected in series between the start button 1SB1 and the contactor KM1, and a normally open contact KA12-2 of the relay KA12 is electrically connected with the PLC controller.
3. The automatic inspection device for water pump according to claim 2, wherein the normally open contact KA12-3 of the relay KA12 is connected in series with the alarm lamp 1HY and then connected in parallel with the manual bypass.
4. The automatic water pump inspection device according to claim 1, wherein normally open contacts KM1-5 of the contactor KM1 are connected in series with the indicator lamp 1HR and then connected in parallel with the manual bypass, and normally closed contacts KM1-6 of the contactor KM1 are connected in series with the indicator lamp 1HG and then connected in parallel with the manual bypass.
5. The automatic water pump inspection device according to claim 1, wherein a pump protector KZ1 is arranged on the outer cover of the water pump M1, an alarm signal output end of the pump protector KZ1 is connected with a zero line N through an alarm lamp HY1, a fault signal output end of the pump protector KZ1 is connected with the zero line N through a relay KA13, a normally closed contact KA13-1 of the relay KA13 is connected in series between the starting button 1SB1 and the contactor KM1, and a normally closed contact KA13-2 of the relay KA13 is electrically connected with the PLC.
6. The automatic water pump inspection device according to claim 1, wherein the control circuit further comprises a frequency converter monitoring circuit, the frequency converter monitoring circuit comprises a relay KA6 and a relay KA7, an operation signal output end of the frequency converter BP is connected with a zero line N through the relay KA6, a fault signal output end of the frequency converter BP is connected with the zero line N through the relay KA7, a normally open contact KA6-1 of the relay KA6 and a normally open contact KA7-1 of the relay KA7 are respectively and electrically connected with the PLC controller, and a normally closed contact KA7-2 of the relay KA7 is connected in series between a normally open contact KA5-1 of the relay KA5 and a time relay KT 1.
7. The automatic water pump inspection device according to claim 6, wherein the frequency converter monitoring circuit further comprises an indicator lamp HR, an indicator lamp HG and an indicator lamp HY, and the normally open contact KA6-2 of the relay KA6 is connected in series with the indicator lamp HR and then connected in parallel with the manual branch, the normally closed contact KA6-3 of the relay KA6 is connected in series with the indicator lamp HG and then connected in parallel with the manual branch, and the normally open contact KA7-3 of the relay KA7 is connected in parallel with the indicator lamp HY and then connected in parallel with the manual branch.
8. The automatic water pump inspection device according to claim 1, wherein the control circuit further comprises a water level monitoring circuit, the water level monitoring circuit comprises a low water level liquid level switch, a high water level liquid level switch and a plurality of intermediate water level liquid level switches, the low water level liquid level switch, the high water level liquid level switch and the plurality of intermediate water level liquid level switches are respectively connected with one intermediate relay in series and then are connected with the manual branch in parallel, a normally closed contact of the intermediate relay corresponding to the low water level liquid level switch is connected between the starting button 1SB1 and the contactor KM1 in series, a normally open contact of the intermediate relay corresponding to the high water level liquid level switch is connected with the manual branch in parallel after being connected with the alarm lamp HY3 in series, and normally open contacts of the intermediate relays corresponding to the low water level liquid level switch, the high water level liquid level switch and the plurality of intermediate water level liquid level switches are respectively connected with the PLC.
9. The automatic water pump inspection device of claim 1, further comprising a mounting box and a mounting plate, wherein the PLC controller is mounted in the mounting box, the control circuit is disposed on the mounting plate, and the mounting plate is detachably inserted into the mounting box.
10. An automatic water pump inspection system is characterized by comprising a monitoring terminal, a communication circuit and a plurality of automatic water pump inspection devices according to any one of claims 1-9, wherein each water pump well is provided with one automatic water pump inspection device, and each automatic water pump inspection device is connected with the monitoring terminal through the communication circuit.
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| CN201810841647.5A CN108799086B (en) | 2018-07-27 | 2018-07-27 | Automatic inspection device and system for water pump |
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| CN109826784B (en) * | 2019-03-26 | 2024-05-10 | 任若琛 | Water injection type automatic detection device for drainage pump |
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| KR200390650Y1 (en) * | 2005-01-18 | 2005-07-25 | 이규현 | 2 pump automatic and manual selection control circuit |
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