CN108385780B - Water supply control system, water supply control method and device and variable frequency pump - Google Patents
Water supply control system, water supply control method and device and variable frequency pump Download PDFInfo
- Publication number
- CN108385780B CN108385780B CN201810182919.5A CN201810182919A CN108385780B CN 108385780 B CN108385780 B CN 108385780B CN 201810182919 A CN201810182919 A CN 201810182919A CN 108385780 B CN108385780 B CN 108385780B
- Authority
- CN
- China
- Prior art keywords
- variable frequency
- state
- frequency pump
- water pressure
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 395
- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000001960 triggered effect Effects 0.000 claims abstract description 21
- 230000003993 interaction Effects 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 40
- 238000006243 chemical reaction Methods 0.000 description 33
- 238000003860 storage Methods 0.000 description 10
- 230000033228 biological regulation Effects 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000004044 response Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a water supply control system, which comprises a plurality of variable frequency pumps and a water pressure detection device which is correspondingly and electrically connected with each variable frequency pump; when any variable frequency pump is in a master machine state to work, the rest variable frequency pumps are in slave machine states; the variable frequency pump working in the master machine state is used for adjusting the water pressure of a user pipe network according to the output water pressure value of the water pressure detection device and dispatching the variable frequency pumps in the slave machine states; when the output frequency of the variable frequency pump working in the master machine state reaches a threshold value, the variable frequency pump working in the slave machine state enters the slave machine state to work, and the variable frequency pump working in the master machine state is triggered to enter the master machine state to work, so that the variable frequency pump working in the master machine state regulates and controls the output water pressure value to be equal to the water pressure set value. Also discloses a water supply control method and a variable frequency pump. Through the design and the cooperative work of the plurality of variable frequency pumps and the water pressure detection device, each variable frequency pump switches the working state of the host machine state and the working state of the slave machine state according to the water pressure condition of the user pipe network, stable and reliable water supply control is provided, and the water supply reliability is greatly improved.
Description
Technical Field
The invention relates to the technical field of water supply, in particular to a water supply control system, a water supply control method, a water supply control device and a variable frequency pump.
Background
Along with the development of industry and urbanization, the density of manufacturers and population in the region is gradually increased, wherein in population and commercial dense areas, clustered buildings and high-rise buildings are developed to meet the changing demands of population and economy. Correspondingly, water supply is an indispensable matching project, and the burden of basic guarantee of industrial production water, domestic water of people and the like is born. With the increase of the cluster buildings and the high-rise buildings, new tests are continuously brought to the construction and the operation management of the water supply system; in addition, in a large environment with economy, energy conservation, environmental protection and high efficiency, the water demand of a user group is required to be considered to be complicated and variable in the daily water supply operation process, and a water supply system is required to adapt to a complicated water supply condition in real time so as to meet the production and living water supply of a new era. However, the conventional water supply system generally adopts a master-slave control structure because a plurality of sets of water pumps work together, and the reliability of water supply is not high.
Disclosure of Invention
Based on the problems of the conventional water supply system, the invention provides a water supply control system, a water supply control method, a water supply control device and a variable frequency pump.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a water supply control system, which includes a plurality of frequency conversion pumps sequentially arranged from a water source end to a user end and connected in parallel, and a water pressure detection device electrically connected to each of the frequency conversion pumps correspondingly; the water pressure detection device is used for detecting the water pressure of a user pipe network, and each variable frequency pump is respectively used for communicating the user pipe network and a main pipe network;
when any variable frequency pump works in a host state, the rest variable frequency pumps are in slave states; the variable-frequency pump working in the master machine state is used for adjusting the water pressure of the user pipe network according to the output water pressure value of the water pressure detection device and dispatching the variable-frequency pumps in the slave machine states;
when the output frequency of the variable frequency pump working in the master machine state reaches a threshold value, the variable frequency pump enters the slave machine state to work, and triggers the variable frequency pump in the next slave machine state to enter the master machine state to work, so that the variable frequency pump working in the master machine state regulates and controls the output water pressure value to be equal to the water pressure set value.
In one embodiment, the slave state comprises a full frequency output state or a standby state, and the threshold value comprises a frequency upper limit value;
when the output frequency of the variable frequency pump working in the host state reaches the upper limit value of the frequency, the variable frequency pump enters the full-frequency output state to work, and triggers the variable frequency pump in the next standby state to enter the host state to work, so that the variable frequency pump working in the current host state regulates and controls the output water pressure value to be equal to the water pressure set value.
In one embodiment, the threshold value further includes a lower frequency limit value;
when the output frequency of the variable frequency pump working in the host state reaches the lower limit value of the frequency, the variable frequency pump enters the standby state to work, and the next full-frequency output state is triggered, so that the variable frequency pump working in the current host state regulates and controls the output water pressure value to be equal to the water pressure set value.
In one embodiment, after any one variable frequency pump in a full-frequency output state works for a set time length, a duty-cycling request is sent to the variable frequency pump working in a host state;
after the variable frequency pump working in the host state receives the alternate break request, if the variable frequency pump in at least one standby state is detected, the variable frequency pump enters a full-frequency output state to work, the variable frequency pump corresponding to the alternate break request is controlled to enter the standby state, and the variable frequency pump in the next standby state is triggered to enter the host state to work.
In one embodiment, when the variable frequency pump in the host state works alone for a set time, the variable frequency pump in the next standby state is triggered to enter the host state to work and enter the standby state.
In one embodiment, when the variable frequency pump in a host state detects that the variable frequency pump in a standby state has a fault, the variable frequency pump with the fault is marked as a fault state;
when the variable frequency pump in the host machine state working fails, triggering the variable frequency pump in the next normal standby state to enter the host machine state working, and marking the variable frequency pump with the failure as the failure state.
In one embodiment, the system further comprises intelligent interaction equipment used for sending an auxiliary control instruction to each variable frequency pump and displaying the working state of each variable frequency pump, and the intelligent interaction equipment is electrically connected with each variable frequency pump through a bus.
In another aspect, an embodiment of the present invention provides a water supply control method according to the above water supply control system, including the following steps:
acquiring a water pressure set value of a user pipe network and an output water pressure value of a water pressure detection device, and comparing the water pressures;
adjusting the output frequency of a variable frequency pump working in a host state according to the water pressure comparison result, and controlling the water pressure of the user pipe network;
if the output frequency of the variable frequency pump working in the host machine state reaches a threshold value, controlling the variable frequency pump working in the host machine state to enter the slave machine state to work, and sending a host machine state trigger signal to the variable frequency pump working in the next slave machine state; the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
In another aspect, an embodiment of the present invention further provides a water supply control apparatus, including:
the water pressure comparison module is used for acquiring a water pressure set value of a user pipe network and an output water pressure value of the water pressure detection device and comparing the water pressures;
the frequency adjusting module is used for adjusting the output frequency of the variable frequency pump working in the state of the host according to the water pressure comparison result and controlling the water pressure of the user pipe network;
the host machine switching module is used for controlling the variable frequency pump working in the host machine state to enter the slave machine state to work and sending a host machine state trigger signal to the variable frequency pump in the next slave machine state when the output frequency of the variable frequency pump working in the host machine state reaches a threshold value; the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
On the other hand, the embodiment of the invention also provides a variable frequency pump, which comprises a water pump, a motor and a frequency converter, wherein the motor is used for driving the water pump; the frequency converter is used for being electrically connected with the water pressure detection device and executing the steps of the water supply control method.
One of the above technical solutions has the following advantages and beneficial effects:
through the design and cooperative work of the variable frequency pumps and the water pressure detection device, the water pressure detection device detects the water pressure of the user pipe network and outputs the water pressure to the corresponding variable frequency pump, and each variable frequency pump switches the working state of a host machine state and a slave machine state according to the water pressure condition of the user pipe network, so that stable and reliable water supply control is provided in the process of increasing or reducing the water supply of the user pipe network. Effectively adapt to complicated and changeable water supply scene, the water supply reliability improves greatly.
Drawings
FIG. 1 is a first schematic block diagram of a water supply control system in one embodiment;
FIG. 2 is a second schematic block diagram of a water supply control system in one embodiment;
FIG. 3 is a third schematic block diagram of a water supply control system in one embodiment;
FIG. 4 is a first flowchart of a water supply control method according to an embodiment;
FIG. 5 is a second flowchart of a water supply control method according to an embodiment;
FIG. 6 is a third flowchart of a water supply control method according to an embodiment;
fig. 7 is a schematic block diagram of a water supply control apparatus according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to preferred embodiments and the accompanying drawings. It is to be understood that the following examples are illustrative only and are not intended to limit the present invention. 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.
Water supply is the basic content required for various production and living activities, such as industrial and agricultural production, daily community water supply in cities and the like. With the development of industry and urbanization, the environment of water supply is more complicated, and the technical requirements of water supply are also continuously increased. In the process of implementing the technical scheme of the invention, the inventor finds that the traditional water supply system is generally a master-slave structure that a plurality of water supply pumps are communicated with a source end master pipe network for supplying water and a user pipe network for accessing users, one water supply pump is adopted in the plurality of water supply pumps as a host, and the other water supply pumps are controlled to work, so that the problem of low water supply reliability exists, and the modern water supply requirement of higher water supply reliability cannot be met.
Referring to fig. 1, based on the above-mentioned problems, an embodiment of the present invention provides a water supply control system 100, which includes a plurality of variable frequency pumps 12 sequentially arranged from a water source end to a user end and connected in parallel, and a water pressure detection device 14 electrically connected to each variable frequency pump 12 correspondingly. The water pressure detection device 14 is used for detecting the water pressure of a user pipe network 15, and each variable frequency pump 12 is respectively used for communicating the user pipe network 15 and the main pipe network 13. When any variable frequency pump 12 is in the master state to work, the other variable frequency pumps 12 are in the slave state. The variable frequency pump 12 in the master state is used for adjusting the water pressure of a user pipe network 15 according to the output water pressure value of the water pressure detection device 14 and dispatching the variable frequency pumps 12 in the slave states. When the output frequency of the variable frequency pump 12 working in the master machine state reaches a threshold value, the variable frequency pump 12 working in the slave machine state enters the slave machine state to work, and the variable frequency pump 12 working in the master machine state is triggered to enter the master machine state to work, so that the variable frequency pump 12 working in the master machine state regulates and controls the output water pressure value to be equal to the water pressure set value.
It is understood that the water supply control system 100 may be applied to various types of water supplies, such as, but not limited to, municipal water supplies, plant water supplies, and water supplies for agriculture and forestry. Various water supply systems generally comprise main parts such as a main pipe network 13, a user pipe network 15, a pressure stabilizing tank 17 and the like. The water source end may be an outflow source of water in the main network 13, such as a source end of tap water. The user end can be one end of each region where the water receiving user is located, for example, the water outlet end of the user pipe network 15 where each water receiving user is located; the user pipe network 15 takes water from the main pipe network 13 and provides water pressure control of the user pipe network 15 through the variable frequency pump 12. The variable frequency pumps 12 can be connected by a bus to operate in parallel. The water pressure set point for the user network 15 may be a constant value provided by the surge tank 17, which causes the actual water pressure of the user network 15 to deviate from the water pressure set point as the user water usage increases or decreases.
The variable frequency pump 12 in the master machine state can actively adjust the water pressure of the user pipe network 15, schedule the rest variable frequency pumps 12 in the slave machine state, and trigger the switching to the slave machine state and trigger the variable frequency pump 12 in the other slave machine state to work in the master machine state according to the output frequency of the variable frequency pump 12, so that the variable frequency pump becomes the current master machine of the water supply control system. Each inverter pump 12 in the slave state may send a request signal to and receive its dispatch from the inverter pump 12 operating in the master state.
Specifically, in the water supply control system 100, during the operation of the water supply system, each variable frequency pump 12 can obtain the actual water pressure of the user pipe network 15 through the water pressure detection device 14 electrically connected to itself. In each variable frequency pump 12, one variable frequency pump 12 in the master state works in the same time period, and is used as the master in the current time period and is responsible for controlling the water pressure of a user pipe network 15 and dispatching the states of other slave machines. When the output frequency of the variable frequency pump 12 in the master state reaches a threshold value, that is, the output power of the variable frequency pump 12 reaches the threshold value, and the water pressure of the user pipe network 15 cannot be continuously and effectively adjusted, the variable frequency pump 12 in the slave state is triggered to enter the master state to work, and the variable frequency pump 12 in the slave state to work receives the scheduling of the next variable frequency pump 12 after entering the master state to work, so that the transfer of the master control right is completed. The next variable frequency pump 12 which enters the main machine state to work takes over the variable frequency pump 12 which works in the previous main machine state to continuously adjust the water pressure of the user pipe network 15.
Therefore, each variable frequency pump 12 can successively enter the master state to work as a master in the water pressure adjusting process, and when the output frequency of the next variable frequency pump 12 entering the master state reaches the threshold value, the actual water pressure of the user pipe network 15, that is, the output water pressure value output by the water pressure detecting device 14 is not equal to the water pressure set value, according to the above switching process of triggering the master state and the slave state, each variable frequency pump 12 successively becomes the master to adjust the water pressure of the user pipe network 15, and the regulation and control of the output water pressure value equal to the water pressure set value are realized.
The variable frequency pumps 12 can be used as a main machine for water supply control in the water supply control process of water pressure regulation of the user pipe network 15, the scheduling control process of the variable frequency pumps 12 in the state of each slave machine by the main machine is greatly simplified, the response speed of control is greatly improved, the problem of low reliability of a main machine and slave machine water supply system structure for fixing one main machine is solved, and the effect of high water supply reliability is achieved.
In one embodiment, when the output power of the inverter pump 12 in the master state reaches the threshold, a trigger signal for instructing the inverter pump 12 in the next slave state to enter the master state to operate may be generated and sent to the inverter pump 12 in the next slave state, so as to trigger the inverter pump 12 in the next slave state to enter the master state to operate and become a new master, and at the same time, the inverter pump 12 in the slave state to operate and receive the scheduling of the new master. Therefore, the conversion efficiency of the variable frequency pumps 12 of the host among the variable frequency pumps 12 can be improved, so that a new host can quickly take over the variable frequency pump 12 working in the state of the previous host and continuously adjust the water pressure of the user pipe network 15, and the response speed of the water pressure adjustment of the user pipe network 15 is effectively increased.
In one embodiment, the water pressure detecting device 14 may be a plurality of water pressure sensors, which operate independently, or may be a single water pressure sensor. For example, but not limited to, the same number of water pressure sensors as the variable frequency pump 12, one water pressure sensor corresponding to one variable frequency pump 12. For example, a water pressure sensor, may also be connected to each variable frequency pump 12 through a serial port to provide an output water pressure value, so that each variable frequency pump 12 may obtain a real-time water pressure value of the user pipe network 15. Therefore, each variable frequency pump 12 can provide required output water pressure value rapidly in real time, and the water pressure of the user pipe network 15 is effectively adjusted.
Referring to fig. 2, in one embodiment, the slave state includes a full frequency output state or a standby state, and the threshold value includes a frequency upper limit value. When the output frequency of the variable frequency pump 12 working in the host state reaches the upper limit value of the frequency, the variable frequency pump 12 working in the host state enters the full-frequency output state to work, and triggers the variable frequency pump 12 in the next standby state to enter the host state to work, so that the variable frequency pump 12 working in the current host state regulates and controls the output water pressure value to be equal to the set water pressure value.
That is, the inverter pump 12 in the slave state may be in a full-frequency output state or a standby state during the operation of the water supply control system 100, where the full-frequency output state is an operation state in which the output frequency reaches the upper limit value of the frequency. The upper frequency limit may be the maximum effective output frequency that the variable frequency pump 12 can support during operation, which generally corresponds to the maximum effective output power of the variable frequency pump 12.
Specifically, when the output water pressure value of the water pressure sensor, that is, the actual water pressure of the user pipe network 15, decreases, for example, the user water consumption increases to cause the actual water pressure of the user pipe network 15 to be lower than the set water pressure value, the variable frequency pump 12 operating in the host state needs to increase the output frequency, so as to increase the actual water pressure of the user pipe network 15. When the output frequency of the variable frequency pump 12 in the host state is increased to the upper limit of the frequency, the actual water pressure of the user pipe network 15 is still lower than the set water pressure value, at this time, the variable frequency pump 12 in the host state enters the full-frequency output state to work, and triggers the variable frequency pump 12 in the next standby state to enter the host state to work, that is, the control right of the host is handed over to the next variable frequency pump 12, so that the variable frequency pump 12 in the next standby state becomes a new host, and the actual water pressure of the user pipe network 15 is continuously increased.
Similarly, it is understood that if the actual water pressure of the user pipe network 15 is still lower than the water pressure set value when the output frequency of the new host is increased to the upper limit of the frequency, the variable frequency pump 12 in the next standby state is continuously triggered to enter the host state to work, so as to transfer the control right of the host to the new host, and further, the new host continuously adjusts the actual water pressure of the user pipe network 15.
For example, when the water supply system starts to supply water, the number 1 variable frequency pump 12 closest to the water source end of the water supply control system 100 is triggered to become the main machine, and the rest variable frequency pumps 12 are in a standby state; when the output frequency of the No. 1 variable frequency pump 12 reaches the upper limit value of the frequency, the No. 2 variable frequency pump 12 is triggered to become a new host machine, so that the control right of a water supply system is handed over to the No. 2 variable frequency pump 12, and the No. 1 variable frequency pump 12 enters a full-frequency output state to work and receives the dispatching of the No. 2 variable frequency pump 12; the No. 2 variable frequency pump 12 increases the output frequency thereof according to the actual water pressure of the user pipe network 15. When the output frequency of the No. 2 variable frequency pump 12 reaches the upper limit value of the frequency, the No. 3 variable frequency pump 12 is triggered to become a new host, so that the control right of the water supply system is handed over to the No. 3 variable frequency pump 12, and the No. 2 variable frequency pump 12 enters a full-frequency output state to work and receives the dispatching of the No. 3 variable frequency pump 12. When the output frequency of the No. 3 variable frequency pump 12 reaches the upper limit value of the frequency, the No. 4 variable frequency pump 12 is triggered to become a new host, so that the control right of the water supply system is handed over to the No. 4 variable frequency pump 12, the No. 3 variable frequency pump 12 enters a full-frequency output state to work and receives the dispatching of the No. 4 variable frequency pump 12, and the like until the output water pressure value is equal to the water pressure set value. It should be noted that the above control process is only exemplary; when the output water pressure value is equal to the set water pressure value, the output water pressure value can be generated in the adjusting process of the variable frequency pump 12 of any host.
Therefore, through the control process, the actual water pressure of the user pipe network 15 can be quickly and reliably increased to the water pressure set value through each variable frequency pump 12, the water pressure adjusting efficiency is higher, and the water pressure fluctuation of the user pipe network 15 in the adjusting process is small.
In one embodiment, the threshold value further includes a lower frequency limit value. When the output frequency of the variable frequency pump 12 working in the host state reaches the lower limit value of the frequency, the variable frequency pump 12 working in the host state enters the standby state to work, and the next variable frequency pump 12 working in the full frequency output state is triggered to enter the host state to work, so that the variable frequency pump 12 working in the current host state regulates and controls the output water pressure value to be equal to the set water pressure value.
It is understood that the lower frequency limit may be the lowest effective output frequency value of the inverter pump 12, and below the lower frequency limit, the inverter pump 12 cannot output effective power and thus cannot provide effective water pressure control.
Specifically, when the output water pressure value of the water pressure sensor, that is, the actual water pressure of the user pipe network 15 rises, for example, the actual water pressure of the user pipe network 15 is higher than the set water pressure value due to the decrease of the water consumption of the user, the variable frequency pump 12 in the host state needs to decrease the output frequency, and the actual water pressure of the user pipe network 15 is decreased. When the output frequency of the variable frequency pump 12 in the host state is reduced to the lower limit value of the frequency, the actual water pressure of the user pipe network 15 is still higher than the set water pressure value, at this time, the variable frequency pump 12 in the host state enters a standby state, and triggers the variable frequency pump 12 in the next full-frequency working state to enter the host state to work, that is, the control right of the host is handed over to the variable frequency pump 12 in the next full-frequency working state, so that the variable frequency pump 12 in the next full-frequency working state becomes a new host, and the actual water pressure of the user pipe network 15 is reduced by continuously reducing the output frequency of the variable frequency pump 12.
Similarly, it is understood that if the actual water pressure of the user pipe network 15 is still higher than the water pressure set value when the output frequency of the new host is reduced to the lower frequency limit, the variable frequency pump 12 in the next full-frequency operating state is continuously triggered to enter the host state to operate, so as to transfer the control right of the host to the new host, and enable the new host to continuously adjust the actual water pressure of the user pipe network 15 to be reduced.
For example, the No. 4 inverter pump 12 farthest from the water source end of the water supply control system 100 may be the current host, and when the water consumption of the user decreases, the No. 4 inverter pump 12 triggers the No. 3 inverter pump 12 to become the new host, so as to transfer the control right of the water supply system to the No. 3 inverter pump 12, and the No. 4 inverter pump 12 enters the standby state and receives the scheduling of the No. 3 inverter pump 12. When the output frequency of the No. 3 variable frequency pump 12 reaches the lower frequency limit value, the No. 3 variable frequency pump 12 triggers the No. 2 variable frequency pump 12 to become a new host, so that the control right of the water supply system is handed over to the No. 2 variable frequency pump 12, the No. 3 variable frequency pump 12 enters a standby state, and the dispatching of the No. 2 variable frequency pump 12 is received. When the output frequency of the No. 2 variable frequency pump 12 reaches the lower frequency limit value, the No. 2 variable frequency pump 12 triggers the No. 1 variable frequency pump 12 to become a new host, so that the control right of the water supply system is handed over to the No. 1 variable frequency pump 12, the No. 2 variable frequency pump 12 enters a standby state, and the dispatching of the No. 1 variable frequency pump 12 is received. When the output frequency of the variable frequency pump 12 # 1 also reaches the lower frequency limit value, the variable frequency pump 12 # 1 also enters the standby state, so until the output water pressure value is equal to the set water pressure value, generally, when all the variable frequency pumps 12 are in standby, the output water pressure value is equal to the set water pressure value, that is, the water pressure of the user pipe network 15 is maintained at the set water pressure value by the pressure stabilizing tank 17. It should be noted that the above control process is also only exemplary; when the output water pressure value is equal to the set water pressure value, the output water pressure value can be generated in the adjusting process of the variable frequency pump 12 of any host.
Therefore, through the control process, the actual water pressure of the user pipe network 15 can be reduced to the set water pressure value through each variable frequency pump 12 quickly and reliably, the water pressure adjusting efficiency is higher, and the water pressure fluctuation of the user pipe network 15 in the adjusting process is small.
In one embodiment, after any variable frequency pump 12 in the full frequency output state operates for a set time period, a duty-cycling request is sent to the variable frequency pump 12 in the main machine state; after the variable frequency pump 12 in the host state receives the alternate rest request, if at least one variable frequency pump 12 in the standby state is detected, the variable frequency pump enters the full frequency output state to work, the variable frequency pump 12 corresponding to the alternate rest request is controlled to enter the standby state, and the variable frequency pump 12 in the next standby state is triggered to enter the host state to work.
It is understood that the set time period can be set according to the rated time of continuous operation of the variable frequency pump 12, such as but not limited to 12 hours. The alternate break request may be a request to the variable frequency pump 12 operating in the master mode to enter a standby mode to stop the machine for a break to avoid overload operation.
Specifically, after the continuous operating time of any variable frequency pump 12 in the full-frequency output state reaches the set time, a duty-cycling request may be sent to the variable frequency pump 12 of the current host. After the variable frequency pump 12 of the current host receives the alternate rest request, whether the variable frequency pump 12 in the standby state exists in the water supply control system 100 can be detected, if so, the variable frequency pump 12 enters the full-frequency output state to work, and meanwhile, the variable frequency pump 12 corresponding to the alternate rest request is controlled to enter the standby state, and the variable frequency pump 12 in the next standby state is triggered to enter the host state to work, so that the variable frequency pump 12 of the current host is replaced to maintain the water supply state. Therefore, the variable frequency pump 12 of the current host machine is used for scheduling each full-frequency output state to exit the work and enter the standby state for alternate rest, so that the fault caused by the overload work of the variable frequency pump 12 can be avoided, the reliability of the water supply control system 100 is improved, and the extra maintenance cost can be avoided.
In one embodiment, when the inverter pump 12 in the main machine state is operated alone for a set time, the inverter pump 12 in the next standby state is triggered to enter the main machine state and enter the standby state.
Specifically, in the water supply control system 100, when the inverter pump 12 in the main machine state operates alone, and other inverter pumps 12 are all in standby, the inverter pump 12 in the main machine state may trigger the inverter pump 12 in the next standby state to enter the main machine state to operate after the continuous operation time reaches the set time, and simultaneously quit to operate and enter the standby state to be in alternate rest. Therefore, the problem that the working time is overtime and overloaded when the frequency conversion pump 12 of the current host works alone can be avoided, the frequency conversion pumps 12 in other slave states are automatically alternated to work as the host, and the reliability of the water supply control system is further improved.
In one embodiment, when the variable frequency pump 12 in the main machine state working fails, the variable frequency pump 12 in the next normal standby state is triggered to enter the main machine state working, and the variable frequency pump 12 in the failure state is marked as the failure state.
It can be understood that the above-mentioned faults can be various abnormal conditions which cause the variable frequency pump 12 in the main machine state operation not to perform effective water pressure regulation and schedule other variable frequency pumps 12, such as but not limited to abnormal power failure, overcurrent or motor overheating of the variable frequency pump 12 in the main machine state operation.
Specifically, when the variable frequency pump 12 in the host state is in failure, the host state trigger signal can be automatically sent to the variable frequency pump 12 in the next normal standby state to trigger the variable frequency pump 12 in the next normal standby state to enter the host state for working, and the variable frequency pump 12 in the failure is replaced to become a new current host; the new current host can mark the frequency conversion pump working in the last host state with a fault as a fault state so as to move the frequency conversion pump 12 out of the water supply control system for work, thereby facilitating the maintenance of operation and maintenance personnel. Therefore, when the current host machine has a fault, the variable frequency pump 12 in the next normal standby state can be automatically dispatched to take over, so that the reliability of the water supply control system 100 in the working process is ensured.
In one embodiment, when the variable frequency pump 12 in the main machine state operation detects the variable frequency pump 12 in the standby state as a fault, the fault variable frequency pump 12 is marked as a fault state.
It is understood that the fault may be, for example, various conditions that the inverter pump 12 in the standby state cannot perform effective water pressure regulation, or an abnormal condition that the inverter pump 12 in the host state is scheduled, such as an abnormal power failure, a failure to send a signal to the inverter pump 12 in the host state, a scheduled signal received, and the like. The inverter pump 12 in the main machine state can detect whether the inverter pump 12 in the standby state has a fault by sending a test signal to the inverter pump 12 in the standby state, or the inverter pump 12 in the standby state cannot respond to a main machine state trigger signal or other scheduling signals.
Specifically, the inverter pump 12 marked as the failure state cannot continue to participate in the operation of the water supply control system, for example, when the inverter pump 12 of the current master triggers the inverter pump 12 of the next slave state, the inverter pump 12 marked as the failure state is skipped, and the master state trigger signal is sent to the inverter pump 12 of the next slave state which is not marked as the failure state. Thus, when the frequency conversion pump 12 in the standby state with a fault exists in the water supply control system, the mark can be moved out of the work of the water supply control system, so as to improve the transfer efficiency of the host control right.
In one embodiment, when the inverter pump 12 in the main machine state detects the inverter pump 12 in the full frequency operation state as a fault, the inverter pump 12 in the fault is marked as a fault and another inverter pump 12 in the standby state is scheduled to enter the full frequency operation state to take over the inverter pump 12 in the fault. Thus, the reliability of the water supply control system can be effectively ensured.
Referring to fig. 3, in one embodiment, the water supply control system 100 further includes an intelligent interaction device 16 for sending an auxiliary control command to each variable frequency pump 12 and displaying the working state of each variable frequency pump 12, and the intelligent interaction device 16 is electrically connected to each variable frequency pump 12 through a bus.
It is to be understood that the smart interactive device 16 may be a smart interactive tablet, or other device computer. The auxiliary control instruction may be, but is not limited to, a start instruction, an operation state viewing instruction, etc. of the water supply control system.
Specifically, the water supply control system 100 may be equipped with an intelligent interaction device 16, and the intelligent interaction device 16 may be connected to each variable frequency pump 12 through a bus so as to send an auxiliary control instruction to the variable frequency pump 12 and receive each working state signal sent by the variable frequency pump 12. The bus may be, for example, an RS485 bus. Therefore, the working state of each variable frequency pump 12 can be intuitively known through the intelligent interaction device 16, and the management of the water supply control system 100 is facilitated.
In one embodiment, when the inverter pump 12 in the main machine state detects a failure of the inverter pump 12 in the full frequency operation state, the inverter pump 12 in the failure state is marked as a failure state, and a failure alarm signal can be sent to the intelligent interactive device 16. Therefore, operation and maintenance personnel can be reminded of maintaining the frequency conversion pump 12 with faults in time, the safety is improved, the fault influence range of the water supply control system is controlled in time, and the maintenance cost is reduced.
Referring to fig. 4, a water supply control method according to the water supply control system 100 is provided, which includes the following steps:
s12, acquiring a water pressure set value of the user pipe network and an output water pressure value of the water pressure detection device, and comparing the water pressures;
it can be understood that the variable frequency pump in the host state can obtain the water pressure set value of the user pipe network by, but not limited to, inputting or receiving the output water pressure value of the water pressure detection device in advance when all the variable frequency pumps are in standby. The variable frequency pump working in the host state can receive the output water pressure value output by the water pressure detection device in real time in the working process, and then compares the output water pressure value with the water pressure set value to detect whether the output water pressure value is equal to the water pressure set value or not.
S14, adjusting the output frequency of the variable frequency pump working in the host state according to the water pressure comparison result, and controlling the water pressure of the user pipe network;
it can be understood that after the variable frequency pump working in the host state can be compared by the water pressure, if the result of the water pressure comparison is that the output water pressure value is not equal to the water pressure set value, the output frequency of the variable frequency pump working in the host state is adjusted to increase or decrease the output power, so that the water pressure of the user pipe network is controlled.
S16, if the output frequency of the variable frequency pump working in the master machine state reaches a threshold value, controlling the variable frequency pump working in the master machine state to enter the slave machine state to work, and sending a master machine state trigger signal to the variable frequency pump working in the next slave machine state; the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
It can be understood that, when the output frequency of the variable frequency pump in the master state operation reaches the threshold value, the variable frequency pump in the master state operation may automatically control to enter the slave state operation, and simultaneously send a master state trigger signal to the variable frequency pump in the next slave state operation to trigger the variable frequency pump in the next slave state operation to enter the master state operation, and a specific control process of the variable frequency pump in the master state operation may refer to a control process of the variable frequency pump in the master state operation in the water supply control system 100 in each embodiment described in this specification.
The variable frequency pump working in the master machine state triggers the next variable frequency pump in the slave machine state to become the master machine for water supply control in the water supply control process of water pressure regulation of a user pipe network through the control method, so that the variable frequency pump working in the master machine state is arranged among the variable frequency pumps, alternate control is carried out according to the water pressure regulation requirement of the user pipe network, the scheduling control process and the control response speed of the variable frequency pump working in the master machine state on the variable frequency pumps in the slave machine state are greatly simplified, the problem of low reliability of a master-slave machine water supply system structure for fixing one master machine is solved, and the effect of high water supply reliability is achieved.
In one embodiment, the water supply control method may also implement the above-mentioned water supply control by executing the above-mentioned control steps through a third-party control device, such as a general control server of the water supply system.
In one embodiment, the slave state comprises a full-frequency output state or a standby state, and the threshold value comprises a frequency upper limit value; referring to fig. 5, the step S16 may specifically include the following steps:
and S162, if the output frequency of the variable frequency pump in the host state working reaches the upper limit value of the frequency, controlling the variable frequency pump in the host state working to enter the full-frequency output state working, and sending a host state trigger signal to the variable frequency pump in the next standby state.
Specifically, when the actual water pressure of the user pipe network drops, for example, the user water consumption increases and the actual water pressure of the user pipe network is lower than the water pressure set value, the variable frequency pump working in the host state needs to increase the output frequency so as to increase the actual water pressure of the user pipe network. When the output frequency of the variable frequency pump working in the host state is increased to the upper limit value of the frequency, the actual water pressure of the user pipe network is still lower than the set water pressure value, at the moment, the variable frequency pump working in the host state enters the full-frequency output state to work, and triggers the variable frequency pump in the next standby state to enter the host state to work, namely, the control right of the host is handed over to the next variable frequency pump, so that the variable frequency pump in the next standby state becomes a new host, and the actual water pressure of the user pipe network is continuously increased. The specific control process of the variable frequency pump working in the main machine state can be referred to the control process of the variable frequency pump working in the main machine state in the water supply control system 100 in the corresponding embodiment described in this specification.
Therefore, the variable frequency pump working in the host state can quickly and reliably improve the actual water pressure of the user pipe network to the water pressure set value through the control process, the water pressure adjusting efficiency is higher, and the water pressure fluctuation of the user pipe network in the adjusting process is small.
In one embodiment, the threshold value further includes a lower frequency limit value; step S16 may specifically include the following steps:
and S164, if the output frequency of the variable frequency pump in the host state working reaches the lower limit value of the frequency, controlling the variable frequency pump in the host state working to enter a standby state working, and sending a host state trigger signal to the variable frequency pump in the next full-frequency output state.
Specifically, when the actual water pressure of the user pipe network rises, for example, the actual water pressure of the user pipe network is higher than the set water pressure value due to the reduction of the water consumption of the user, the output frequency needs to be reduced to reduce the actual water pressure of the user pipe network. When the output frequency of the variable frequency pump working in the host state is reduced to the lower limit value of the frequency, the actual water pressure of the user pipe network is still higher than the set water pressure value, at the moment, the variable frequency pump working in the host state enters a standby state, and sends a host state trigger signal to the variable frequency pump in the next full-frequency working state to trigger the variable frequency pump to enter the host state for working, namely, the control right of the host is handed over to the variable frequency pump in the next full-frequency working state, so that the variable frequency pump in the next full-frequency working state becomes a new host, and the actual water pressure of the user pipe network is reduced by continuously reducing the output frequency of the variable frequency pump. The specific control process of the variable frequency pump working in the main machine state can be referred to the control process of the variable frequency pump working in the main machine state in the water supply control system 100 in the corresponding embodiment described in this specification.
Therefore, the variable frequency pump working in the host state can quickly and reliably reduce the actual water pressure of the user pipe network to the water pressure set value through the control process, the water pressure adjusting efficiency is higher, and the water pressure fluctuation of the user pipe network in the adjusting process is small.
Referring to fig. 6, in one embodiment, the water supply control method further includes the steps of:
s18, after receiving the alternate-break request sent by any variable-frequency pump in the full-frequency output state, if at least one variable-frequency pump in the standby state is detected, controlling the variable-frequency pump working in the host state to enter the full-frequency output state, controlling the variable-frequency pump corresponding to the alternate-break request to enter the standby state, and sending a host state trigger signal to the variable-frequency pump in the next standby state.
Specifically, after the continuous working time of any variable frequency pump in the full-frequency output state reaches the set time, a duty-off request can be sent to the variable frequency pump of the current host. Therefore, after the variable frequency pump working in the host state receives the alternate rest request, whether a variable frequency pump in a standby state exists in the water supply control system 100 can be detected, if so, the variable frequency pump enters a full frequency output state to work, and simultaneously, the variable frequency pump corresponding to the alternate rest request is controlled to enter the standby state, and a host state trigger signal is sent to the variable frequency pump in the next standby state to trigger the variable frequency pump to enter the host state to work, so that the variable frequency pump working in the current host state is replaced, and the water supply state is maintained. The specific control process of the variable frequency pump working in the main machine state can be referred to the control process of the variable frequency pump working in the main machine state in the water supply control system 100 in the corresponding embodiment described in this specification.
Therefore, the frequency conversion pump working in the host machine state is used for scheduling each full-frequency output state to exit the work and enter the standby state for alternate break, so that the frequency conversion pump can be prevented from being in fault due to overload work, the reliability of the water supply control system 100 is improved, and the extra maintenance cost can be avoided.
In one embodiment, the above water supply control method further includes:
and S20, when the working time of the single frequency conversion pump working in the host state reaches the set time, sending a host state trigger signal to the frequency conversion pump in the next standby state, and controlling the frequency conversion pump working in the host state to enter the standby state.
Specifically, when the single frequency conversion pump in the host state works and other frequency conversion pumps are standby, the frequency conversion pump in the host state can send a host state trigger signal to the frequency conversion pump in the next standby state after detecting that the continuous working time of the frequency conversion pump per se reaches the set time so as to trigger the frequency conversion pump in the next standby state to enter the host state to work, and meanwhile, the frequency conversion pump per se quits working and enters the standby state to take turns. The specific control process of the variable frequency pump working in the main machine state can be referred to the control process of the variable frequency pump working in the main machine state in the water supply control system 100 in the corresponding embodiment described in this specification.
Therefore, the problem that the working time is overtime and overloaded when the frequency conversion pump of the current host works alone can be avoided, the frequency conversion pumps in other slave states are automatically alternated to work as the host, and the reliability of the water supply control system is further improved.
In one embodiment, the above water supply control method further includes:
and S22, when detecting that the variable frequency pump working in the host machine state has a fault, sending a fault alarm and sending a host machine state trigger signal to the variable frequency pump in the next standby state.
Specifically, when a fault occurs, for example, when a fault occurs in self-detection, the variable frequency pump operating in the host state may automatically generate a host state trigger signal and send the host state trigger signal to the variable frequency pump in the next normal standby state, so as to trigger the variable frequency pump in the next normal standby state to enter the host state to operate, and take over the variable frequency pump in the fault to become a new current host. The specific control process of the variable frequency pump working in the main machine state can be referred to the control process of the variable frequency pump working in the main machine state in the water supply control system 100 in the corresponding embodiment described in this specification. Therefore, when the current host machine has a fault, the variable frequency pump in the next normal standby state can be automatically dispatched to take over, so that the reliability of the water supply control system 100 in the working process is ensured.
In one embodiment, the above water supply control method further includes:
and S24, when the frequency conversion pump in the standby state is detected to be in failure, the frequency conversion pump in the failure is marked as the failure state.
It can be understood that the above-mentioned fault may be, for example, various abnormal states that the inverter pump in the standby state cannot perform effective water pressure regulation, or the inverter pump in the host state is scheduled, such as an abnormal power failure, a failure to send a signal to the inverter pump in the host state, a scheduled signal being received, and the like. The variable frequency pump working in the host state can detect whether the variable frequency pump in the standby state has a fault or not by sending a test signal to the variable frequency pump in the standby state, or by the variable frequency pump in the standby state failing to respond to a host state trigger signal, other scheduling signals and the like.
Specifically, when the variable frequency pump in the host state detects that the next or any one of the variable frequency pumps in the standby state is in fault, the variable frequency pump in fault is marked as in fault. Therefore, when the variable frequency pump in the master state is triggered to trigger the variable frequency pump in the next slave state, the variable frequency pump marked as the fault state is skipped, and the master state trigger signal is sent to the variable frequency pump in the next slave state which is not marked as the fault state. Therefore, when the frequency conversion pump in the standby state with a fault exists in the water supply control system, the frequency conversion pump working in the host state marks the frequency conversion pump and then moves out of the water supply control system to improve the transfer efficiency of the host control right. It should be noted that the order of the steps of the water supply control method in each of the above embodiments is not limited, and the corresponding drawings are only schematic and do not limit the execution order of the steps.
Referring to fig. 7, in one embodiment, a water supply control device 200 is further provided, which includes a water pressure comparing module 22, a frequency adjusting module 24, and a host switching module 26. The water pressure comparison module 22 is used for acquiring a water pressure set value of a user pipe network and an output water pressure value of the water pressure detection device, and performing water pressure comparison; the frequency adjusting module 24 is used for adjusting the output frequency of the variable frequency pump working in the host state according to the water pressure comparison result and controlling the water pressure of the user pipe network; the host switching module 26 is configured to control the variable frequency pump in the host state to enter the slave state to operate when the output frequency of the variable frequency pump in the host state reaches a threshold value, and send a host state trigger signal to the variable frequency pump in the next slave state; the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
Through the water supply control device 200, in the water supply control process of water pressure regulation of a user pipe network, the host machine switching module 26 triggers the frequency conversion pump in the next slave machine state to become the host machine for water supply control, so that the frequency conversion pump in the host machine state works among the frequency conversion pumps, alternate control is performed according to the water pressure regulation requirement of the user pipe network, the scheduling control process and the control response speed of the frequency conversion pump in the host machine state to the frequency conversion pumps in the slave machine states are greatly simplified, the problem of low reliability of the structure of a master-slave machine water supply system for fixing one host machine is solved, and the effect of high water supply reliability is achieved.
In one embodiment, the water supply control device 200 may further implement the sub-steps of the water supply control method in each of the above embodiments.
The embodiments of the above-described respective water supply control methods may be realized by a program executed by a processor in a data processing device, such as a frequency converter. Obviously, the programs may also constitute the above-mentioned aspects of the present invention. Further, the program stored in one storage medium is generally executed by directly reading the program out of the storage medium or by installing or copying the program into a storage device (such as a hard disk and or a memory) of the data processing device. Such a storage medium therefore also constitutes the present invention. The storage medium may use any type of recording means, such as a paper storage medium (e.g., paper tape, etc.), a magnetic storage medium (e.g., a flexible disk, a hard disk, a flash memory, etc.), an optical storage medium (e.g., a CD-ROM, etc.), a magneto-optical storage medium (e.g., an MO, etc.), and the like.
Therefore, the embodiment of the present invention further discloses a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the computer program can make the process execute the following steps: acquiring a water pressure set value of a user pipe network and an output water pressure value of a water pressure detection device, and comparing the water pressures; adjusting the output frequency of the variable frequency pump working in the state of the host according to the water pressure comparison result, and controlling the water pressure of the user pipe network; if the output frequency of the variable frequency pump working in the host machine state reaches a threshold value, controlling the variable frequency pump working in the host machine state to enter the slave machine state to work, and sending a host machine state trigger signal to the variable frequency pump working in the next slave machine state; the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
In one embodiment, the computer program may be further configured to perform the substeps of the water supply control method according to any one of the above embodiments of the present invention when executed by the processor.
The embodiment of the invention also provides a variable frequency pump which comprises a water pump, a motor and a frequency converter. The motor is used for driving the water pump. The frequency converter is used for electrically connecting the water pressure detection device described in the foregoing embodiment and for executing the above-described water supply control method.
It will be appreciated that the pump may be used to communicate between the user network and the mains network 13 of the water supply system. The frequency converter can execute the water supply control method, so that the work of the motor is controlled, the water pump is driven to take water from the main pipe network 13 to the user pipe network, and the water pressure of the user pipe network is adjusted. It should be noted that the variable frequency pump may contain other accessories in addition to the water pump, the motor and the frequency converter.
Therefore, through the control of the frequency converter on the motor, the variable frequency pump can work in a master machine state or a slave machine state in the water supply control system, the scheduling control process when the variable frequency pump works in cooperation with other variable frequency pumps is greatly simplified, and the response speed of the control is improved.
It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A water supply control system is characterized by comprising a plurality of variable frequency pumps which are sequentially distributed from a water source end to a user end and are connected in parallel, and a water pressure detection device which is correspondingly electrically connected with each variable frequency pump; the water pressure detection device is used for detecting the water pressure of a user pipe network, and each variable frequency pump is respectively used for communicating the user pipe network and a main pipe network;
when any variable frequency pump works in a host state, the rest variable frequency pumps are in slave states; the variable frequency pumps working in the master machine state are used for adjusting the water pressure of the user pipe network according to the output water pressure value of the water pressure detection device and dispatching the variable frequency pumps in the slave machine states, and each variable frequency pump working in the slave machine state can send a request signal to the variable frequency pump working in the master machine state and receive dispatching of the request signal; the slave state comprises a full frequency output state and a standby state;
when the output frequency of the variable frequency pump working in the host state reaches the upper limit value of the frequency, the variable frequency pump enters the full-frequency output state to work, and triggers the variable frequency pump in the next standby state to enter the host state to work, so that the transfer of the control right of the host is completed, and the variable frequency pump working in the host state regulates and controls the output water pressure value to be equal to the water pressure set value of the user pipe network.
2. The water supply control system according to claim 1, wherein the variable frequency pump in a main machine state is in a standby state when the output frequency reaches a lower frequency limit value, and the variable frequency pump in a next full-frequency output state is triggered to enter the main machine state to work, so that the variable frequency pump in the current main machine state regulates the output water pressure value to be equal to the water pressure set value.
3. The water supply control system according to claim 2, wherein after any one of the variable frequency pumps in the full-frequency output state works for a set time, a duty-cycling request is sent to the variable frequency pump working in the host state;
after the variable frequency pump working in the host state receives the alternate break request, if the variable frequency pump in at least one standby state is detected, the variable frequency pump enters a full-frequency output state to work, the variable frequency pump corresponding to the alternate break request is controlled to enter the standby state, and the variable frequency pump in the next standby state is triggered to enter the host state to work.
4. The water supply control system according to claim 3, wherein when the variable frequency pump in the main machine state is operated alone for a set time, the variable frequency pump in the next standby state is triggered to enter the main machine state and enter the standby state.
5. The water supply control system according to claim 3, characterized in that when the variable frequency pump in a main machine state detects that the variable frequency pump in a standby state is in fault, the variable frequency pump in fault is marked as a fault state;
when the variable frequency pump in the host machine state working fails, triggering the variable frequency pump in the next normal standby state to enter the host machine state working, and marking the variable frequency pump with the failure as the failure state.
6. The water supply control system according to claim 3, wherein when the variable frequency pump in a main machine state detects that the variable frequency pump in a full frequency output state has a fault, the variable frequency pump in the fault is marked as a fault state and another variable frequency pump in a standby state is scheduled to enter the full frequency output state for operation.
7. The water supply control system according to claim 1, further comprising an intelligent interaction device for sending an auxiliary control instruction to each variable frequency pump and displaying the working state of each variable frequency pump, wherein the intelligent interaction device is electrically connected with each variable frequency pump through a bus.
8. A water supply control method of a water supply control system according to any one of claims 1 to 7, wherein the threshold value includes an upper frequency value and a lower frequency value, the method comprising the steps of:
acquiring a water pressure set value of a user pipe network and an output water pressure value of a water pressure detection device, and comparing the water pressures;
adjusting the output frequency of a variable frequency pump working in a host state according to the water pressure comparison result, and controlling the water pressure of the user pipe network;
if the output frequency of the variable frequency pump working in the host machine state reaches the threshold value, controlling the variable frequency pump working in the host machine state to enter the slave machine state to work, and sending a host machine state trigger signal to the variable frequency pump in the next slave machine state; the variable frequency pumps working in the master machine state can dispatch the rest variable frequency pumps in the slave machine state, and each variable frequency pump working in the slave machine state can send a request signal to the variable frequency pump working in the master machine state and receive the dispatching of the variable frequency pump; and the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
9. A water supply control device applied to the water supply control system according to any one of claims 1 to 7, characterized in that the device comprises:
the water pressure comparison module is used for acquiring a water pressure set value of a user pipe network and an output water pressure value of the water pressure detection device and comparing the water pressures;
the frequency adjusting module is used for adjusting the output frequency of the variable frequency pump working in the state of the host according to the water pressure comparison result and controlling the water pressure of the user pipe network;
the host machine switching module is used for controlling the variable frequency pump working in the host machine state to enter the slave machine state to work and sending a host machine state trigger signal to the variable frequency pump in the next slave machine state when the output frequency of the variable frequency pump working in the host machine state reaches a threshold value; the master state trigger signal is used for triggering the variable frequency pump in the next slave state to enter the master state to work.
10. The variable frequency pump is characterized by comprising a water pump, a motor and a frequency converter, wherein the motor is used for driving the water pump; the frequency converter is used for electrically connecting a water pressure detection device, and a program in a processor in the frequency converter is used for executing the steps of the water supply control method of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182919.5A CN108385780B (en) | 2018-03-06 | 2018-03-06 | Water supply control system, water supply control method and device and variable frequency pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182919.5A CN108385780B (en) | 2018-03-06 | 2018-03-06 | Water supply control system, water supply control method and device and variable frequency pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108385780A CN108385780A (en) | 2018-08-10 |
| CN108385780B true CN108385780B (en) | 2021-04-02 |
Family
ID=63070068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810182919.5A Active CN108385780B (en) | 2018-03-06 | 2018-03-06 | Water supply control system, water supply control method and device and variable frequency pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108385780B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464412B (en) * | 2021-07-05 | 2023-04-18 | 广州市百福电气设备有限公司 | Multi-pump parallel coordination control method and system, computer equipment and storage medium |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2081255C1 (en) * | 1994-11-15 | 1997-06-10 | Анатолий Аркадьевич Берлин | Water supply system |
| CN203849623U (en) * | 2013-12-02 | 2014-09-24 | 温州乐控节能科技有限公司 | Constant-voltage water supply control system |
| CN203770108U (en) * | 2013-12-31 | 2014-08-13 | 上海众辰电子科技有限公司 | Water pump control device for constant pressure water supply |
| CN106284520A (en) * | 2016-08-26 | 2017-01-04 | 上海亨公电线电缆有限公司 | Inequality based on PLC synchronizes constant pressure water supply system and control method thereof |
| CN206070629U (en) * | 2016-08-30 | 2017-04-05 | 成都海得控制系统有限公司 | Tunnel fire-fighting constant pressure water supplying system |
| CN206245393U (en) * | 2016-11-28 | 2017-06-13 | 南京尤孚泵业有限公司 | A kind of microcomputer controls full variable-frequency speed-adjusting supply equipment |
| CN106522312A (en) * | 2016-12-09 | 2017-03-22 | 屈兆辉 | Multi-pump parallel-connection variable frequency and constant pressure control system |
| CN206616621U (en) * | 2017-03-15 | 2017-11-07 | 广州市泽控自动化科技有限公司 | A kind of energy-saving type frequency conversion water system |
-
2018
- 2018-03-06 CN CN201810182919.5A patent/CN108385780B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108385780A (en) | 2018-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105714879B (en) | A kind of M drags the control method of the frequency-conversion control cabinet in N-type Intelligent constant-voltage water system | |
| CA2940212C (en) | Systems and methods for error monitoring and handling in control systems | |
| CN110805551A (en) | Intelligent control method for multi-pump-set water supply system | |
| CN102362259B (en) | System and method for altering a user interface of a power device | |
| WO2022142452A1 (en) | On-grid/off-grid scheduling method and apparatus, and energy-storage power supply system | |
| CN107577141A (en) | The grid-connected watch dog monitoring system of dual redundant and electricity generation system | |
| CN112327732A (en) | Smart building interior micro-edge service control method and system and electronic equipment | |
| CN108385780B (en) | Water supply control system, water supply control method and device and variable frequency pump | |
| JP5976074B2 (en) | Computer system and operation method thereof | |
| CN102561460A (en) | Intelligent variable-frequency constant-pressure water supply system | |
| US20230280709A1 (en) | Systems and methods for building energy management during power-loss event | |
| CN113867500A (en) | Case heat dissipation control method, device, equipment and storage medium | |
| KR20160080052A (en) | Method and system for managing electric power | |
| JP6114279B2 (en) | Energy management device and control method of energy management device | |
| CN110778489B (en) | Control method and device for realizing stable energy saving of water pump set | |
| CN111309129A (en) | Remote reset method and system for automatic start failure of well site data acquisition device | |
| CN117353349B (en) | Power supply state control method of energy storage system, storage medium and electronic equipment | |
| CN207008361U (en) | Domestic air conditioning long-distance intelligent control device | |
| CN219157844U (en) | Water supply system | |
| JP6026296B2 (en) | Power control apparatus, power control system, and power control method | |
| RU2813336C2 (en) | Power source hibernation method and device, method and device for power source hibernation and hibernation apparatus | |
| CN115864499A (en) | Energy supply control method and device, energy supply system and storage medium | |
| CN114320864A (en) | Water pump control method and related device | |
| CN117878895A (en) | Management method and management device of energy storage system, energy storage system and storage medium | |
| JP6542578B2 (en) | Power feeding system, power feeding method and server |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |