CN113931261A - Common full-frequency-conversion water supply control cabinet - Google Patents
Common full-frequency-conversion water supply control cabinet Download PDFInfo
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- CN113931261A CN113931261A CN202111283345.9A CN202111283345A CN113931261A CN 113931261 A CN113931261 A CN 113931261A CN 202111283345 A CN202111283345 A CN 202111283345A CN 113931261 A CN113931261 A CN 113931261A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 28
- 238000004891 communication Methods 0.000 claims abstract description 26
- 230000007306 turnover Effects 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 20
- 230000007958 sleep Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004622 sleep time Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
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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
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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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
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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
- F04B49/02—Stopping, starting, unloading or idling control
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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
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
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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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- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structural Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a common full-frequency-conversion water supply control cabinet, which comprises: the gateway passes through first communication interface links to each other with the water pump, programmable logic controller pass through the second communication interface with the gateway links to each other, converter, water pump, level sensor, pressure sensor, water tank business turn over water motorised valve, touch display screen, buzzer siren respectively with programmable logic controller links to each other, and the access control ware links to each other with infrared alarm, and the watch-dog links to each other with touch display screen, the converter with the water pump links to each other, two liang of links to each other of converter, the converter with the quantity of water pump is the same, level sensor is used for gathering the water level value of water tank, pressure sensor is used for gathering water pump outlet pressure. By adopting the invention, the reliability and stability of secondary water supply can be improved, and the power consumption of the secondary water supply control system can be effectively reduced.
Description
Technical Field
The invention relates to the field of water supply control, in particular to a common full-variable-frequency water supply control cabinet.
Background
The variable-frequency speed-regulating water supply technology appearing in the nineties of the last century is rapidly applied to the secondary water supply industry, but currently, the mainstream adopted is still the single-variable-frequency control technology, a plurality of water pump units are only provided with one frequency converter, the unit operates according to a power frequency-variable frequency combined operation mode, a control system only has one frequency converter for outputting, once the frequency converter fails, the whole pump unit stops working, and when the power frequency-variable frequency operation mode is switched, the obvious defects that water supply is temporarily stopped, the water supply reliability is poor, part of time is not in a water supply efficiency interval and the like exist. Therefore, the inventor provides a common full-variable frequency water supply control cabinet to solve the problems.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a common full-frequency-conversion water supply control cabinet, such that one frequency converter drives one water pump to work, which will significantly improve reliability and stability of secondary water supply, and implement one-to-one full-frequency-conversion operation control of a pump set, so as to make water pressure at a user end more stable, and at the same time, ensure that each water pump operates in a high-efficiency region, and effectively reduce power consumption of a secondary water supply control system.
Based on this, the invention provides a common full-frequency-conversion water supply control cabinet, which comprises:
the system comprises a plurality of frequency converters, water pumps, a programmable logic controller, a monitor, an entrance guard controller, an infrared alarm, a buzzer alarm, a gateway, a first communication interface, a second communication interface, a liquid level sensor, a pressure sensor, a water tank water inlet and outlet electric valve and a touch display screen, wherein the number of the water pumps is the same as that of the frequency converters;
the gateway passes through first communication interface with the water pump links to each other, programmable logic controller passes through second communication interface with the gateway links to each other, converter, water pump, level sensor, pressure sensor, water tank business turn over water motorised valve, touch display screen, buzzer siren respectively with programmable logic controller links to each other, entrance guard's controller with infrared alarm links to each other, the watch-dog with touch display screen links to each other, the converter with the water pump links to each other, two liang of links to each other of converter, level sensor is used for gathering the water level value of water tank, pressure sensor is used for gathering water pump outlet pressure.
And the gateway accesses the programmable logic controller at preset time, and copies and stores the accessed data stored in the programmable logic controller.
When the programmable logic controller fails, the gateway controls the second communication interface to be closed, and the gateway sends an alarm signal to external terminal equipment.
If the liquid level of the water tank detected by the liquid level sensor is within a preset liquid level range, the first frequency converter controls the first water pump to operate, and when the pressure value detected by the pressure sensor reaches a preset pressure range, the first water pump motor operates stably.
When the pressure value detected by the pressure sensor fails to reach the preset pressure range, the programmable logic controller controls the first frequency converter to increase output power and voltage, at the moment, the rotating speed of the water pump motor is increased, and when the pressure value detected by the pressure sensor reaches the preset pressure range, the first water pump motor stably runs.
When the first frequency converter increases the output power and the voltage and fails to enable the pressure value detected by the pressure sensor to reach a preset pressure range, the programmable logic controller controls the second frequency converter to be started, the second water pump is started along with the second frequency converter, the programmable logic controller controls the frequency of the first water pump to be reduced, the pressure value detected by the pressure sensor reaches a preset pressure value, and the first water pump and the second water pump both run stably.
When the pressure value detected by the pressure sensor is higher than a preset pressure value, the programmable logic controller controls the frequency converter to reduce the frequency, so that the pressure value detected by the pressure sensor is at the preset pressure value.
The programmable logic controller also controls the first frequency converter to enter a dormant state, and the other frequency converters increase the output power and voltage, so that the pressure value detected by the pressure sensor is at a preset pressure value.
Wherein, entrance guard's controller includes: the system comprises a wireless transceiver, a face recognition controller and a memory; wireless transceiver, memory respectively with the face identification controller links to each other, and outside camera is installed in the pump house gate for gather personnel's that enter the door face image data, and will face image data upload to the access control ware, the access control ware will face image data with the face image data that the memory prestores are compared, if exist with the unmatched face data of prestore face image data, infrared alarm reports to the police.
When the liquid level sensor detects that the water level of the water tank is lower than a preset water level value and the water level of the water tank is not restored to the preset water level value within preset time, the programmable logic controller controls the water pump to stop running and controls the buzzer alarm to give an alarm.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, the number of the frequency converters is matched with that of the pumps, namely, the frequency converters are in one-to-one correspondence, a plurality of pumps form a pump set, every two frequency converters are connected, one frequency converter corresponds to one pump, a control mode of one-to-one frequency conversion is adopted, and the programmable logic controller controls the communication between the motor and the frequency conversion system through an industrial communication line. When the operation efficiency of one pump cannot meet the use pressure requirement in the process of controlling the operation of a group of pump groups, the programmable logic controller starts another frequency converter through logic action to increase the output efficiency of the pump groups; when the operating pressure of the equipment is greater than the operating pressure, the frequency converters simultaneously reduce the frequency, before the frequency is reduced to the operating efficiency of the single pump, the operation of one water pump is stopped, the frequency of the other frequency converter is simultaneously promoted, the pump set is ensured to work in a self high-efficiency area, and the problem of low-efficiency interval operating conditions existing in a one-to-one mode of the frequency converters is solved, so that the purposes of environmental protection and energy saving are achieved. The programmable logic controller detects the running condition of the frequency converter in real time and judges whether to start or close one frequency converter according to the running parameters so as to ensure the stable running. One frequency converter drags a water pump work, will obviously improve the reliability and the stability of secondary water supply, realizes that pump package one-to-one full frequency conversion operation control for user side water pressure is more stable, guarantees simultaneously that every water pump all operates at high-efficient interval, effective lower secondary water supply control system consumption.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a general full-frequency-conversion water supply control cabinet according to an embodiment of the present invention;
fig. 2 is another schematic diagram of a common full-frequency-conversion water supply control cabinet according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The secondary water supply is a form that a unit or an individual stores and pressurizes urban public water supply or self-built facility water supply, and supplies water to users or self-use through a pipeline. The secondary water supply is mainly established for compensating the pressure shortage of the municipal water supply pipeline and ensuring the water consumption of dwellings and livelihoods in high-rise people.
Fig. 1 is a schematic diagram of a general full-frequency-conversion water supply control cabinet provided in an embodiment of the present invention, where the control cabinet includes:
the system comprises a plurality of frequency converters 104, water pumps 102, a programmable logic controller 106, a monitor 108, an access controller 113, an infrared alarm 114, a buzzer alarm, a gateway 103, a first communication interface 101, a second communication interface 105, a liquid level sensor 107, a pressure sensor 111, a water tank water inlet and outlet electric valve 110 and a touch display screen 109, wherein the number of the frequency converters 104 is the same as that of the frequency converters 102;
the gateway 103 is connected with the water pump 102 through the first communication interface 101, the programmable logic controller 106 is connected with the gateway 103 through the second communication interface 105, the frequency converter 104, the water pump 102, the liquid level sensor 107, the pressure sensor 111, the water tank water inlet and outlet electric valve 110, the touch display screen 109 and the buzzer alarm are respectively connected with the programmable logic controller 106, the door access controller 113 is connected with the infrared alarm 114, the monitor 108 is connected with the touch display screen 109, the frequency converter 104 is connected with the water pump 102, the frequency converter 104 is connected in pairs, the liquid level sensor 107 is used for collecting a water level value of the water tank, and the pressure sensor 111 is used for collecting outlet pressure of the water pump 102.
The gateway 103 accesses the programmable logic controller 106 at a preset time, and copies and stores the accessed data stored in the programmable logic controller 106. The data stored in the programmable logic controller 106 may include: water supply data such as water outlet pressure, frequency of pump increase/decrease of the frequency converter 104, sleep frequency, etc.
When the programmable logic controller 106 fails, the gateway 103 controls the second communication interface 105 to be closed, and the gateway 103 sends an alarm signal to an external terminal device. At this time, the gateway 103 may also transmit the data copied from the plc 106 to a designated server, so that each designated server may directly acquire the water supply data. The gateway 103 is connected to the water pump 102 through the first communication interface 101, at this time, the gateway 103 may close the second communication interface 105, and prevent the programmable logic controller 106 from uploading fault data to affect data interaction, at this time, the first communication interface 101 is opened, and the gateway 103 may directly perform data interaction with the water pump 102.
The communication mode between the plc 106 and the gateway 103 is half duplex communication, so that when two hosts are linked, if two hosts simultaneously issue inquiry or control commands to the plc 106, a packet collision phenomenon occurs, resulting in data loss. To avoid this risk, the gateway 103 has a function of storing commands, and when the host A, B issues commands at the same time, the command of the host B is temporarily stored in our gateway 103, and after the command of the host a returns data, the command of the host B is sent to the plc 106.
When the water pump 102 is ready to operate, a main power breaker of the control cabinet is closed, the control cabinet is started, if the liquid level sensor 107 detects that the liquid level of the water tank is within a preset liquid level range, the first frequency converter 104 operates to start the first water pump 102, the rotating speed of the motor of the first water pump 102 is increased along with the increase of the slope starting frequency and the output voltage, the outlet pressure is gradually increased, and when the pressure sensor 111 detects that the outlet pressure reaches the preset pressure range, the rotating speed of the motor of the first water pump 102 is stably operated.
When the water consumption of a user is increased and the rotating speed of the motor of the first water pump 102 cannot reach the preset pressure range, at this time, the programmable logic controller 106 sends a control signal to enable the first frequency converter 104 to increase the output frequency and the voltage, at this time, the rotating speed of the motor of the first water pump 102 is increased to the preset pressure range, so that the stable operation of a water supply system is achieved, the process is dynamic and continuous, and the user side hardly feels the water pressure change.
When the water consumption of a user is further increased, the first frequency converter 104 outputs at full frequency, the first water pump 102 runs at full frequency but still cannot reach the set pressure, the other frequency converter 104 is started, then the second water pump 102 starts at variable frequency, the frequency of the first water pump 102 is reduced, and finally when the pressure reaches the set value, the two water pumps 102 are both in the optimal efficiency range and stably run, so that the water supply output pressure is kept stable. Because the system operates in the high-efficiency interval when a plurality of water pumps 102 work simultaneously, no electric energy waste caused by the low-efficiency interval exists, and an ideal energy-saving effect can be achieved. When one water pump 102 works with variable frequency for a long time, the programmable logic controller 106 will switch to the next pump operation in a timing mode.
When the water consumption of the user is reduced, the water outlet pressure is higher than the set pressure, and the first frequency converter 104 immediately reduces the frequency and reduces the speed, so that the water outlet pressure is always stabilized at the set pressure value. When the water consumption of the user is further reduced, the first frequency converter 104 is reduced to the preset sleep frequency and the delay sleep time, one frequency converter 104 is in sleep, the water pump 102 stops running along with the sleep frequency, and the other frequency converters 104 increase the output frequency and the output voltage to stabilize the water outlet pressure at the set value and still keep running in the high-efficiency interval. When the water consumption is further reduced, the above processes are repeated, at least one pump is kept to operate to maintain the pressure stable, the other pumps enter a dormant state, the programmable logic controller 106 detects the water pressure change in real time, and when the water pressure is lower than the set pressure of the system, the frequency converter 104 is restarted to operate.
When level sensor 107 detects that the water tank water level is too low, within 2 minutes in the preset time, the water level still does not resume, water pump 102 out of service, programmable logic controller 106 control the buzzer siren is opened, reminds relevant staff to look over the maintenance, when level sensor 107 detects that the water tank water level reaches preset water level scope, programmable logic controller 106 control the buzzer siren is closed.
Based on similar principles of the water pump 102, it can be seen that: when the water pump 102 speed changes, the flow is proportional to the speed, the head is proportional to the square of the speed, and the shaft power is proportional to the cube of the speed. From this proportional law relationship, it can be seen that when the same water pump 102 changes in rotation speed, the main performance parameters of the water pump 102 will change according to the proportional law and the efficiency will remain substantially unchanged during the change. Therefore, the electric power taken by the motor of the water pump 102 is greatly reduced by adjusting the flow rate by adjusting the rotating speed. Thus, the present invention is a good method that can significantly save energy.
The monitor 108 includes a camera for collecting image data of the pump room and uploading the image data to an external terminal device.
The access controller 113 includes: the system comprises a wireless transceiver, a face recognition controller and a memory; wireless transceiver, memory respectively with the face identification controller links to each other, and outside camera is installed in the pump house gate for gather personnel's that enter the door face image data, and will face image data upload to access control controller 113, access control controller 113 will face image data with the face image data that the memory prestores are compared, if exist with the unmatched face data of prestore face image data, infrared alarm 114 reports to the police.
The touch display screen 109 can display the current process flow in real time, and the information includes the working condition of the frequency converter 104, the water outlet pressure, the liquid level of the water tank and the like, so that the secondary water supply flow is visualized, and the use requirements of users are met. Parameters such as water outlet pressure, pump increasing/decreasing frequency of the frequency converter 104, dormancy frequency and the like can be modified on the touch screen, and the debugging process of the frequency conversion system is simplified. The touch screen is also provided with password protection, and only professional technicians enter the parameter modification interface through the passwords to debug or maintain, so that the secondary water supply system is protected from being modified by random non-professional personnel. The entrance guard system is linked with the infrared alarm system, and is set to enter in a card swiping or password mode, once illegal invasion is detected, the entrance guard system is linked with the infrared alarm system to give an alarm, and the safety performance of the secondary water supply system is greatly improved. The camera system can monitor the state of the pump room in real time, and the water supply behaviors such as abnormal access of personnel are endangered, photographed and uploaded to the cloud platform, and alarm is triggered.
Fig. 2 is another schematic diagram of a common full-frequency conversion water supply control cabinet according to an embodiment of the present invention, in which 1 is a frequency converter, 2 is a programmable logic controller, 3 is an access controller, 4 is a main power circuit breaker, 5 is a frequency converter power circuit breaker, 6 is a gateway, 7 is a current transformer, 8 is a low-voltage fuse, 9 is a switching power supply, 10 is an electric energy meter, 11 is an intermediate relay, 12 is an output terminal row, 13 is a cable management rack, 14 is a touch screen, and 15 is a panel indicator light. The external infrared alarm system is connected with the access control system through an industrial line, and the safety protection of the pump room is set; the liquid level automatic controller is connected with the programmable logic controller and detects the liquid level of the water tank; the water inlet and outlet electric valve of the water tank is connected with the programmable logic controller to realize the automatic control of the liquid level of the water tank.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, the number of the frequency converters 104 is matched with that of the pumps, namely, the frequency converters are in one-to-one correspondence, a plurality of pumps form a pump group, every two frequency converters 104 are connected, one frequency converter 104 corresponds to one pump, a one-to-one frequency conversion control mode is adopted, and the programmable logic controller 106 controls the communication between the motor and the frequency conversion system through an industrial communication line. In the process of controlling the operation of a group of pump groups, when the operation efficiency of one pump cannot meet the use pressure requirement, the programmable logic controller 106 starts another frequency converter 104 through logic action, so that the output efficiency of the pump groups is increased; when the operating pressure of the equipment is higher than the operating pressure, the frequency converters 104 simultaneously reduce the frequency, and before the frequency is reduced to the operating efficiency of the single pump, the operation of one water pump 102 is stopped, the frequency of the other frequency converters 104 is simultaneously increased, so that the pump set is ensured to work in a self high-efficiency area, the problem of the operating condition of a low-efficiency interval in which the frequency converters 104 are driven by one to multiple modes is solved, and the purposes of environmental protection and energy saving are achieved. The plc 106 detects the operation of the frequency converters 104 in real time, and determines whether to start or shut down one of the frequency converters 104 according to the operation parameters, thereby ensuring stable operation. One frequency converter 104 drags one water pump 102 to work, so that the reliability and stability of secondary water supply can be obviously improved, one-to-one full frequency conversion operation control of a pump set is realized, the water pressure of a user side is more stable, each water pump 102 is guaranteed to operate in an efficient interval, and the power consumption of a secondary water supply control system is effectively lowered. The frequency conversion-power frequency state switching is not carried out, the water supply process is dynamically balanced, and the pressure of the water outlet end is stable. The equipment adopts an efficiency balance operation mode when a plurality of pumps run in a full frequency conversion mode, all the pumps are in an efficiency area, and the energy-saving effect is ideal.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. Ordinary full frequency conversion water supply control cabinet, its characterized in that includes:
the system comprises a plurality of frequency converters, water pumps, a programmable logic controller, a monitor, an entrance guard controller, an infrared alarm, a buzzer alarm, a gateway, a first communication interface, a second communication interface, a liquid level sensor, a pressure sensor, a water tank water inlet and outlet electric valve and a touch display screen, wherein the number of the water pumps is the same as that of the frequency converters;
the gateway passes through first communication interface with the water pump links to each other, programmable logic controller passes through second communication interface with the gateway links to each other, converter, water pump, level sensor, pressure sensor, water tank business turn over water motorised valve, touch display screen, buzzer siren respectively with programmable logic controller links to each other, entrance guard's controller with infrared alarm links to each other, the watch-dog with touch display screen links to each other, the converter with the water pump links to each other, two liang of links to each other of converter, level sensor is used for gathering the water level value of water tank, pressure sensor is used for gathering water pump outlet pressure.
2. The common full-frequency-conversion water supply control cabinet according to claim 1, wherein the gateway accesses the programmable logic controller at a preset time, and copies and stores the accessed data stored in the programmable logic controller.
3. The ordinary full-frequency-conversion water supply control cabinet according to claim 2, wherein when the programmable logic controller fails, the gateway controls the second communication interface to be closed, and the gateway sends an alarm signal to an external terminal device.
4. The normal full-frequency-conversion water supply control cabinet according to claim 1, wherein if the liquid level of the water tank detected by the liquid level sensor is within a preset liquid level range, the first frequency converter controls the first water pump to operate, and when the pressure value detected by the pressure sensor reaches a preset pressure range, the first water pump motor operates stably.
5. The normal full-frequency-conversion water supply control cabinet according to claim 1, wherein when the pressure value detected by the pressure sensor fails to reach a preset pressure range, the programmable logic controller controls the first frequency converter to increase the output power and the voltage, at this time, the rotation speed of the water pump motor is increased, and when the pressure value detected by the pressure sensor reaches the preset pressure range, the first water pump motor is stably operated.
6. The normal full-frequency-conversion water supply control cabinet according to claim 4, wherein when the first frequency converter increases the output power and the voltage and fails to make the pressure value detected by the pressure sensor reach a preset pressure range, the programmable logic controller controls the second frequency converter to be turned on, the second water pump is turned on along with the second frequency converter, and the programmable logic controller controls the frequency of the first water pump to be reduced, so that the pressure value detected by the pressure sensor reaches a preset pressure value, and the first water pump and the second water pump both run stably.
7. The ordinary full-frequency-conversion water supply control cabinet according to claim 1, wherein when the pressure value detected by the pressure sensor is higher than a preset pressure value, the programmable logic controller controls the frequency converter to reduce the frequency and speed, so that the pressure value detected by the pressure sensor is at the preset pressure value.
8. The ordinary full-frequency-conversion water supply control cabinet according to claim 1, wherein the programmable logic controller further controls the first frequency converter to enter a sleep state, and the other frequency converters increase the output power and voltage, so that the pressure value detected by the pressure sensor is at a preset pressure value.
9. The common full-frequency-conversion water supply control cabinet according to claim 1, wherein the access controller comprises: the system comprises a wireless transceiver, a face recognition controller and a memory; wireless transceiver, memory respectively with the face identification controller links to each other, and outside camera is installed in the pump house gate for gather personnel's that enter the door face image data, and will face image data upload to the access control ware, the access control ware will face image data with the face image data that the memory prestores are compared, if exist with the unmatched face data of prestore face image data, infrared alarm reports to the police.
10. The common full-frequency-conversion water supply control cabinet according to claim 1, wherein the liquid level sensor detects that the water level of the water tank is lower than a preset water level value and when the water level of the water tank is not restored to the preset water level value within a preset time, the programmable logic controller controls the water pump to stop running and controls the buzzer alarm to give an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111283345.9A CN113931261A (en) | 2021-11-01 | 2021-11-01 | Common full-frequency-conversion water supply control cabinet |
Applications Claiming Priority (1)
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95106071A (en) * | 1995-04-19 | 1997-01-27 | Военный инженерный строительный институт | Method for providing reliability of pump plants |
| CN204001064U (en) * | 2014-07-04 | 2014-12-10 | 四川健华环保科技有限公司 | Full-automatic independent frequency-conversion control cabinet |
| CN105714879A (en) * | 2016-01-27 | 2016-06-29 | 连云港清源科技有限公司 | M-driving-N type (M converters driving N water pumps) intelligent variable frequency control cabinet, constant-pressure water supply system and control method |
| CN205530462U (en) * | 2016-01-27 | 2016-08-31 | 连云港清源科技有限公司 | One drags many types of intelligent variable frequency control cabinet and contains its constant pressure water supply system |
| CN111520316A (en) * | 2020-05-12 | 2020-08-11 | 济宁金水科技有限公司 | Multi-pump parallel multi-frequency conversion synchronous speed regulation water supply control system and control method thereof |
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2021
- 2021-11-01 CN CN202111283345.9A patent/CN113931261A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95106071A (en) * | 1995-04-19 | 1997-01-27 | Военный инженерный строительный институт | Method for providing reliability of pump plants |
| CN204001064U (en) * | 2014-07-04 | 2014-12-10 | 四川健华环保科技有限公司 | Full-automatic independent frequency-conversion control cabinet |
| CN105714879A (en) * | 2016-01-27 | 2016-06-29 | 连云港清源科技有限公司 | M-driving-N type (M converters driving N water pumps) intelligent variable frequency control cabinet, constant-pressure water supply system and control method |
| CN205530462U (en) * | 2016-01-27 | 2016-08-31 | 连云港清源科技有限公司 | One drags many types of intelligent variable frequency control cabinet and contains its constant pressure water supply system |
| CN111520316A (en) * | 2020-05-12 | 2020-08-11 | 济宁金水科技有限公司 | Multi-pump parallel multi-frequency conversion synchronous speed regulation water supply control system and control method thereof |
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