CN114635476B - Control method for total running time of balanced water pump of water supply system and water supply system thereof - Google Patents
Control method for total running time of balanced water pump of water supply system and water supply system thereof Download PDFInfo
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- CN114635476B CN114635476B CN202011486816.1A CN202011486816A CN114635476B CN 114635476 B CN114635476 B CN 114635476B CN 202011486816 A CN202011486816 A CN 202011486816A CN 114635476 B CN114635476 B CN 114635476B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 474
- 238000000034 method Methods 0.000 title claims abstract description 76
- 230000001174 ascending effect Effects 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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, valves, in the pipe systems
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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
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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
Abstract
The invention provides a control method for balancing the total running time of water pumps applied to a water supply system, which can determine the water pump with the longest total running time in real time according to the total running time of each water pump and set as a first water pump, calculate the difference value between the total running time of the first water pump and the total running time of each water pump, when any difference value is larger than or equal to a preset threshold value, circularly start the first water pump and the water pump with the absolute value of the difference value of the total running time of the first water pump smaller than the preset threshold value in a first period, and circularly start the water pump with the absolute value of the difference value of the total running time of the first water pump larger than or equal to the preset threshold value in a second period, so that the water pump for starting the water supply system can balance the total running time of each water pump, thereby effectively avoiding serious abrasion of the water pump in the water supply system, integrally prolonging the service life of the water pump, reducing the times of water pump replacement and lowering the operation cost.
Description
Technical Field
The invention relates to the technical field of water pump starting control, in particular to a control method for balancing total running time of a water pump applied to a water supply system and the water supply system thereof.
Background
The secondary water supply is closely related to the life of people, and the secondary water supply relates to a constant pressure water supply control function. The constant pressure water supply means that a frequency converter is adopted to carry out closed-loop control on the water supply pressure: when the water consumption is increased, the frequency is increased, and the rotation speed of the water pump is increased; when the water consumption is reduced, the frequency is reduced, and the rotation speed of the water pump is reduced. The variable-frequency constant-pressure water supply control function not only improves the quality of water supply and satisfies the water consumption experience of users, so that the water supply and the water consumption are balanced, but also the energy consumption is reduced and the electric charge is saved.
At present, the water supply system mainly adopts an industrial frequency conversion control method, and the water supply system can adjust the running number of the water pumps in real time according to the water supply pressure. Some water supply systems start each water pump through timing circulation to ensure that each water pump has a chance of being started, so that the problem that part of water pumps rust due to long-time non-operation is avoided, but the total operation time of each water pump is not balanced; in addition, when the water supply system is stopped for restarting due to reasons, the existing water supply system can preferentially start the first water pump, so that the total running time of the first water pump is longer than that of other water pumps, the abrasion of the first water pump is serious, and meanwhile, the total running time of each water pump in the water supply system is not balanced; in addition, when the water supply system fails, the existing water supply system does not consider the problem of balancing the total running time of the new water pump and the old water pump after the failed water pump is replaced by the new water pump, the water supply system is still controlled according to the original logic, the new water pump and the old water pump work for the same time, the total running time of the new water pump is always shorter than the respective total running time of other water pumps, the new water pump is not fully utilized, and the running total running time of each water pump in the water supply system is not balanced.
In view of the foregoing, it is desirable to provide a control method for balancing the total running time of water pumps applicable to a water supply system, so as to reduce the wear level of the water pumps in the water supply system by balancing the total running time of each water pump in the water supply system, integrally improve the service life of the water pumps, reduce the number of times of replacing the water pumps, and further reduce the operation cost.
It should be noted that the information of the present invention in the above background section is only for enhancing the understanding of the background of the present invention and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
It is an object of the present disclosure to provide a control method of an equilibrium water pump total operation time applied to a water supply system and a water supply system thereof, which overcome, at least in part, one or more problems due to limitations and disadvantages of the related art.
According to a first aspect of the present invention, there is provided a control method of balancing total operation time of a water pump applied to a water supply system, comprising: acquiring the total running time of each water pump in real time; according to the total running time of each water pump, determining the water pump with the longest total running time in real time and setting the water pump as a first water pump; calculating a difference value between the total running time of the first water pump and the total running time of each water pump, and comparing the difference value with a preset threshold value; when any difference value is larger than or equal to the preset threshold value, periodically starting each water pump according to a preset rule; wherein the periodically and circularly starting each water pump according to the preset rule comprises the following steps: circularly starting the first water pump and a water pump with the absolute value of the difference value of the total running time of the first water pump being smaller than the preset threshold value in a first period; and cyclically starting the water pump with a second period, wherein the absolute value of the difference value of the total running time of the water pump and the first water pump is larger than or equal to the preset threshold value, and the second period is larger than the first period.
In some embodiments, the control method further comprises: and circularly starting each water pump according to the water pump station number of the water supply system.
In some embodiments, the control method further comprises: and circularly starting each water pump according to a mechanism of shortest total running time and preferential starting of the water pumps in the water supply system.
In some embodiments, the cyclically activating each water pump according to a mechanism for shortest-first activation of total operating time of water pumps in the water supply system comprises: the total running time of each water pump is arranged in ascending order; sequentially starting a water pump in the water supply system according to the ascending arrangement result; and after each water pump is started in sequence, executing the steps in a circulating way.
In some embodiments, the control method further comprises: acquiring a preset limiting value; acquiring a preset period; and calculating the first period and the second period according to the preset period and the preset limiting value.
In some embodiments, the calculating the first period and the second period from the preset period and the preset limit value comprises: calculating the first period T1 and the second period T2 according to the following formula t1=t/N; t2= (T-T/N) +t; wherein T is the preset period, and N is the preset limit value.
In some embodiments, the control method further comprises: monitoring the working state of a water pump in the water supply system in real time; determining whether the water pump has faults according to the working state of the water pump; if yes, sending prompt information; and after a preset time period, receiving failure release information, and setting the total running time of the new water pump to be zero if the failure release information contains the new water pump identification.
In some embodiments, the control method further comprises: acquiring the number of the new water pumps and the number of the old water pumps; and calculating the second period according to the preset period, the number of new water pumps, the number of old water pumps and the preset limiting value.
In some embodiments, the calculating the first period from the preset period and the preset limit value comprises: the first period T1 is calculated according to the following formula: t1=t/N; the calculating the second period according to the preset period, the number of new water pumps, the number of old water pumps and the preset limiting value comprises: the second period T2 is calculated according to the following formula: t2= (T-T/N) a/b+t; wherein T is the preset period, N is the preset limiting value, A is the number of the new water pumps, and B is the number of the old water pumps.
In some embodiments, the control method further comprises: and when the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold value, respectively modifying the first period and the second period into the preset period.
In some embodiments, the control method further comprises: and when the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold value, circularly starting each water pump in the water supply system in the preset period.
In some embodiments, the control method further comprises: when the water supply system needs to stop M water pumps, determining the water pump with the longest total running time in the water supply system according to the total running time of each water pump, and preferentially stopping the M water pumps with the longest total running time, wherein M is a positive integer.
According to a second aspect of the present invention, there is provided a water supply system applied to a control method for equalizing a total operation time of a water pump.
By means of the technical scheme, the total running time of each water pump in the water supply system is balanced, severe abrasion of the water pumps in the water supply system is effectively avoided, the service life of the water pumps is prolonged, the frequency of replacing the water pumps is reduced, and the running cost is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 schematically illustrates a flow chart of a control method of an equalized water pump total operation time applied to a water supply system according to an embodiment of the invention;
FIG. 2 schematically illustrates a flow chart of a control method of the total running time of an equalizing water pump applied to a water supply system according to another embodiment of the invention;
FIG. 3 schematically illustrates a flow chart of a control method of the total running time of an equalizing water pump applied to a water supply system according to another embodiment of the invention;
FIG. 4 schematically illustrates a flow chart of a control method of the total running time of an equalizing water pump applied to a water supply system according to another embodiment of the invention;
FIG. 5 schematically illustrates a flow chart of a control method of the total running time of an equalizing water pump applied to a water supply system according to another embodiment of the invention;
FIG. 6 schematically illustrates a schematic diagram of a start-up mode from a water pump failure to a failure reset according to an embodiment of the present invention;
fig. 7 schematically shows a schematic diagram of a related art starting manner from a failure to a failure reset of a water pump;
FIG. 8 schematically illustrates a diagram of balancing the total running time of a water pump according to a water pump station number start-up mechanism in accordance with an embodiment of the present invention;
FIG. 9 schematically illustrates a schematic diagram of the total running time of the equalizing water pump after the new water pump is replaced according to the present invention;
fig. 10 schematically shows a schematic diagram of a water supply system of a control method for equalizing the total operation time of a water pump according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
Fig. 1 schematically shows a flow chart of a control method of the total operation time of an equalizing water pump applied to a water supply system according to an embodiment of the present invention.
As shown in fig. 1, the control method for the total running time of the balance water pump applied to the water supply system comprises steps S110 to S140.
Step S110, the total running time of each water pump is obtained in real time.
And step S120, determining the water pump with the longest total running time in real time according to the total running time of each water pump, and setting the water pump as the first water pump.
Step S130, calculating a difference between the total running time of the first water pump and the total running time of each water pump, and comparing the difference with a preset threshold.
And step S140, when any difference value is larger than or equal to the preset threshold value, starting each water pump in a timing and circulating mode according to a preset rule. For example, step S140 may specifically include cyclically starting the first water pump with a first period and starting the water pump with an absolute value of a difference value of a total operation time of the first water pump being smaller than the preset threshold; and circularly starting the water pump with the absolute value of the difference value of the total running time of the first water pump being larger than or equal to the preset threshold value in a second period, wherein the second period is larger than the first period.
By starting each water pump of the water supply system by the method, the total running time of each water pump can be balanced, serious abrasion of the water pump in the water supply system is effectively avoided, the service life of the water pump is prolonged, the frequency of replacing the water pump is reduced, and the operation cost is reduced.
In some embodiments, the water supply system may include three or more water pumps, each having a unique water pump station number.
In some embodiments, when each water pump is started, the time length of each operation of each water pump is recorded in real time, then the total operation time of the water pump started at this time is calculated in real time, and the total operation time of the water pump is stored, so that when the water supply system starts each water pump according to the total operation time of each water pump, the total operation time of each water pump can be quickly obtained.
In some embodiments, the water pump with the longest total operating time is determined in real time based on the total operating time of each water pump. For example, the total operation time of each water pump is arranged in ascending or descending order, the water pump with the longest total operation time is determined according to the ascending or descending order, and then the water pump is automatically set as the first water pump.
In some embodiments, when there is a difference between the total operation time of the first water pump and the total operation time of each water pump that is greater than or equal to the preset threshold, the water supply system performs a timing cycle, and starts the first water pump in a first period cycle and the water pump whose absolute value of the difference between the total operation time of the first water pump and the total operation time of the first water pump is less than the preset threshold; and circularly starting the water pump with the absolute value of the difference value of the total running time of the first water pump larger than or equal to the preset threshold value in a second period, wherein the second period is larger than the first period, namely the time for executing the timing circulation of the first water pump and the water pump with the absolute value of the difference value of the total running time of the first water pump smaller than the preset threshold value is shorter, and the time for executing the timing circulation of the water pump with the absolute value of the difference value of the total running time of the first water pump larger than or equal to the preset threshold value is longer, so that the total running time of each water pump in the water supply system is balanced.
In some embodiments, the control method further comprises cyclically starting each water pump according to a water pump station number of the water supply system. For example, the first water pump is started in a first cycle according to the water pump station number of the water supply system, the absolute value of the difference value between the first water pump and the total running time of the first water pump is smaller than the water pump with a preset threshold value, and the water pump with the absolute value of the difference value between the first water pump and the total running time of the first water pump is started in a second cycle according to the water pump station number of the water supply system, and the starting mode combines the total running time of the water pump and the water pump station number, so that the mode of starting the water pump of the water supply system is enriched.
In some embodiments, the control method further includes: and circularly starting each water pump according to a mechanism of shortest total running time and preferential starting of the water pumps in the water supply system. For example, the water supply system comprises three water pumps, namely a pump 1, a pump 2 and a pump 3, wherein the total running time of the pump 1 is 250 minutes, the total running time of the pump 2 is 100 minutes, and the total running time of the pump 3 is 320 minutes, and in this case, the water supply system preferentially circulates and starts the pump 2, so that the running time among the pump 1, the pump 2 and the pump 3 can be quickly balanced.
In some embodiments, cyclically activating each water pump according to a mechanism for shortest-first activation of total running time of the water pumps in the water supply system may include: and when the difference value between the total running time of the first water pump and the total running time of each water pump is greater than or equal to the preset threshold value, circularly starting each water pump according to a mechanism of shortest-first starting of the total running time of the water pumps in the water supply system, and/or balancing the total running time of each water pump in the water supply system by the method, so that the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the set threshold value, and circularly starting each water pump according to the mechanism of shortest-first starting of the total running time of the water pumps in the water supply system.
In some embodiments, the control method further includes: when the water supply system needs to stop M water pumps, determining the water pump with the longest total running time in the water supply system according to the total running time of each water pump, and preferentially stopping the M water pumps with the longest total running time, wherein M is a positive integer. For example, three water pumps in the current water supply system are running, namely, a pump 1, a pump 2 and a pump 3, wherein the total running time of the current pump 1 is 100 minutes, the total running time of the current pump 2 is 250 minutes, and the total running time of the current pump 3 is 320 minutes, in this case, if 1 water pump needs to be stopped, the water supply system determines that the pump 3 is the water pump with the longest current total running time, and at the moment, the pump 3 is preferentially stopped, so that the total running time of the pump 1 and the pump 2 can be prolonged, and the running time among the pump 1, the pump 2 and the pump 3 can be balanced.
In some embodiments, the water supply system may count the total running time of each water pump, and when the water supply system is stopped for reasons, normally stopped or periodically switched, and started again, the water supply system preferentially starts the water pump with the short total running time, and preferentially stops the water pump with the longest total running time, so as to balance the total running time of each water pump. Referring to fig. 6, when the water supply is normally started, the water supply preferentially starts the pump 1 having the shortest total operation time. In the second period, the water supply system is in fault when the pump 2 is operated, and after the fault is reset, the pump 3 with the shortest total operation time is started. When the pump 3 run time reaches the set timed cycle time, the water supply will restart the pump with the shortest total run time, e.g. pump 2, and the water supply will restart pump 2.
Fig. 2 schematically shows a flow chart of a control method of the total operation time of the balance pump applied to the water supply system according to another embodiment of the present invention.
As shown in fig. 2, the cyclic activation of each water pump according to the mechanism of shortest running time first activation of the water pumps in the water supply system may specifically include step S210 and step S230.
In step S210, the total running time of each water pump is arranged in ascending order;
in step S220, the water pumps in the water supply system are sequentially started according to the ascending arrangement result;
in step S230, after the water pumps are started in sequence, the above steps are executed in a loop, and steps S210 to S220 are executed in a loop.
According to the method, the total running time of each water pump can be arranged in an ascending order, the water pumps in the water supply system are started in sequence according to the ascending order, and the steps are executed in a circulating way after each water pump is started in sequence, so that the total running time of each water pump in the water supply system can be quickly balanced, the situation that part of the water pumps in the water supply system are seriously worn is effectively avoided, the service life of the water pumps in the water supply system is prolonged as a whole, and the frequency of replacing the water pumps is reduced.
In some embodiments, the total run time of each water pump is arranged in ascending order. For example, the water supply system includes three water pumps, namely, pump 1, pump 2 and pump 3, wherein the total running time of pump 1 is 100 minutes, the total running time of pump 2 is 250 minutes, the total running time of pump 3 is 320 minutes, the total running times of pump 1, pump 2 and pump 3 are arranged in ascending order, the result of the ascending order is the total running time of pump 1, the total running time of pump 2 and the total running time of pump 3, pump 1, pump 2 and pump 3 are started in turn according to the result of the ascending order, and after the starting of pump 3 is completed, steps S210 to S220 are circulated.
Fig. 3 schematically shows a flow chart of a control method of the total operation time of the balance pump applied to the water supply system according to another embodiment of the present invention.
As shown in fig. 3, the control method may further include steps S310 to S330.
In step S310, a preset limit value is acquired.
In step S320, a preset period is acquired.
In step S330, the first period and the second period are calculated according to the preset period and the preset limit value.
The method can calculate the first period and the second period according to the preset period and the preset limiting value, and the first period and the second period calculated in the mode are more accurate.
In some embodiments, the preset limiting value and the preset period may be set according to the actual situation that the water supply system starts the water pump, which is not limited herein.
In some embodiments, calculating the first period and the second period from the preset period and the preset limit value includes calculating the first period T1 and the second period T2 from the following formula.
For example, t1=t/N;
for example, t2= (T-T/N) +t;
wherein T is a preset period, and N is a preset limiting value.
In some embodiments, the control method further includes: when the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold value, the first period and the second period are respectively modified into preset periods. For example, the total running time of each water pump in the water supply system is balanced through steps S110 to S140, and the first period and the second period are respectively modified to be preset periods when the difference between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold, so that each water pump of the water supply system can be started in the same preset period, the water supply system can conveniently control each water pump in the same starting mode, and the mode of starting the water pump of the water supply system is simplified.
As described with reference to fig. 8, in process 1, pump 1 is the water pump with the longest total operating time, the difference between the total operating time of pump 1 and the total operating time of pump 2 is greater than the preset threshold, and the difference between the total operating time of pump 1 and the total operating time of pump 3 is less than the preset threshold, in which case pumps 1 and 3 are started in a first cycle (T/N) and pump 2 are started in a second cycle (T-T/N) +t, referring to process M. When the difference between the pump 1 and the pump 2 and the pump 3 is smaller than the preset threshold, the pump 1, the pump 2 and the pump 3 are all started in a circulating way in a preset period T, and the process M+1 is referred.
In some embodiments, the control method further includes: and when the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold value, circularly starting each water pump in the water supply system in a preset period. For example, the difference between the total operation time of the first water pump and the total operation time of each water pump is calculated in step S130, and when the difference is smaller than the preset threshold value, each water pump in the water supply system is cyclically started in a preset period.
Fig. 4 schematically shows a flow chart of a control method of the total operation time of the balance pump applied to the water supply system according to another embodiment of the present invention.
As shown in fig. 4, the control method may further include steps S410 to S440.
In step S410, the operation state of the water pump in the water supply system is monitored in real time.
In step S420, it is determined whether the water pump has a malfunction according to the operation state of the water pump.
In step S430, if present, a prompt is sent.
In step S440, after a preset period of time, failure release information is received, and if the failure release information includes a new water pump identifier, the total running time of the new water pump is set to zero.
According to the method, whether the water pump has faults or not can be determined according to the working state of the water pump, so that the fault water pump can be found timely, related personnel can be prompted by sending prompt information, the related personnel can repair or replace the fault water pump timely according to the prompt information, after a preset time period, the water supply system can receive fault release information, if the fault release information contains a new water pump identifier, the total running time of the new water pump is set to be zero, and the situation that the new water pump is started by the total running time of the fault water pump can be avoided.
In some embodiments, the operating state of the water pump may refer to a rotation speed of the water pump or a water supply of the water pump, but is not limited thereto.
In some embodiments, it is determined whether the water pump is malfunctioning based on the operating state of the water pump. For example, whether the water pump has a fault is determined according to the rotation speed condition of the water pump. For another example, whether the water pump has a malfunction is determined according to the water supply condition of the water pump.
Fig. 5 schematically shows a flow chart of a control method of the total operation time of the balance pump applied to the water supply system according to another embodiment of the present invention.
As shown in fig. 5, the above control method may further include step S510 and step S520.
In step S510, the new water pump number and the old water pump number are acquired.
In step S520, the second period is calculated according to the preset period, the number of new water pumps, the number of old water pumps, and the preset limit value.
According to the method, the second period can be calculated according to the preset period, the number of the new water pumps, the number of the old water pumps and the preset limiting value, and the accuracy of the second period is further improved, so that the second period is more suitable for an application scene of starting the new water pumps.
In some embodiments, calculating the first period from the preset period and the preset limit value comprises: the first period T1 is calculated according to the following formula:
for example, t1=t/N;
calculating the second period according to the preset period, the number of new water pumps, the number of old water pumps and the preset limiting value comprises calculating the second period T2 according to the following formula.
For example, t2= (T-T/N) a/b+t;
wherein T is a preset period, N is a preset limiting value, A is the number of new water pumps, and B is the number of old water pumps.
Referring to fig. 7, in the related art, the water pump 1 is started in a first period and the water pump 2 is started in a second period according to the water pump station number, but the water pump 2 is failed at this time, so that the water pump 1 is continuously started, and the water pump 2 is started in a third period, and the water pump 2 at this time is a new water pump for replacement. In the related art, after a new water pump is replaced by a fault, the load balancing problem of the new water pump and the old water pump is not considered, the new water pump and the old water pump still work for the same time, the starting mode can not fully utilize the new water pump, and the running total running time of each water pump in a water supply system is not balanced. In this embodiment, when the water pump in the water supply system is replaced by a new water pump due to failure, the water supply system can automatically empty the total running time of the previously failed water pump, so as to reckon the total running time of the new water pump. The total running time of the newly replaced water pump is shortest, but each water pump is circularly started by adopting a mechanism of starting the water pump with the shortest total running time and priority, so that the problem that the old pump does not run for a long time and rusts due to the fact that the newly replaced water pump is always in a running state in the earlier stage of water supply is avoided. The control method of the invention circularly starts the old water pump by a first period T1 (T/N), and circularly starts the new water pump by a second period T2 ((T-T/N) A/B+T).
Referring to fig. 9, in the process 1, the pump 1 and the pump 3 are old pumps, the pump 1 is the pump with the longest total operation time, the total operation time of the new water pump is zero, the difference between the total operation time of the pump 1 and the total operation time of the pump 3 is smaller than a preset threshold, and the difference between the total operation time of the pump 1 and the total operation time of the new pump is larger than or equal to the preset threshold. In this case, pumps 1 and 3 are started in a first cycle T1 (T/N) and a new pump is started in a second cycle T2 ((T-T/N) a/b+t), referring to processes 2 to M. When the difference between the pump 1 and the pump 3 and the new pump is smaller than the preset threshold, the pump 1, the pump 3 and the new pump are all started in a circulating way with a preset period T, and the process M+1 is referred.
Fig. 10 schematically shows a schematic diagram of a water supply system of a control method for equalizing the total operation time of a water pump according to an embodiment of the present invention. As shown in fig. 10, the water supply system of the control method for equalizing the total operation time of the water pump may include a human-machine interface 10 (i.e., HMI), a programmable logic controller 11 (i.e., PLC), a frequency converter 12 (i.e., VFD), a water pump 13, a water pump 14, a water pump 15, and a sensor 16.
In some embodiments, the above-mentioned control method for balancing the total running time of the water pump may be implemented through interaction among the human-machine interface 10 (i.e., HMI), the programmable logic controller 11 (i.e., PLC), the frequency converter 12 (i.e., VFD), and the sensor 16, and specific implementation steps of the control method are described with reference to the embodiments of fig. 1 to 5, which are not repeated herein.
In some embodiments, the preset threshold, the preset limit, and the preset period may be set by the human interface 10.
By means of the technical scheme, the total running time of each water pump in the water supply system is balanced, severe abrasion of the water pumps in the water supply system is effectively avoided, the service life of the water pumps is prolonged, the frequency of replacing the water pumps is reduced, and the running cost is reduced.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the invention. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a touch terminal, or a network device, etc.) to perform the method according to the embodiments of the present invention.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (13)
1. The control method for the total running time of the balanced water pump applied to the water supply system comprises three or more water pumps and is characterized by comprising the following steps:
acquiring the total running time of each water pump in real time;
according to the total running time of each water pump, determining the water pump with the longest total running time in real time and setting the water pump as a first water pump;
calculating a difference value between the total running time of the first water pump and the total running time of each water pump, and comparing the difference value with a preset threshold value;
when any difference value is larger than or equal to the preset threshold value, periodically starting each water pump according to a preset rule;
wherein the periodically and circularly starting each water pump according to the preset rule comprises the following steps:
circularly starting the first water pump and a water pump with the absolute value of the difference value of the total running time of the first water pump being smaller than the preset threshold value in a first period; and
and circularly starting the water pump with the absolute value of the difference value of the total running time of the first water pump being larger than or equal to the preset threshold value in a second period, wherein the second period is larger than the first period.
2. The control method according to claim 1, characterized in that the control method further comprises: and circularly starting each water pump according to the water pump station number of the water supply system.
3. The control method according to claim 1, characterized in that the control method further comprises: and circularly starting each water pump according to a mechanism of shortest total running time and preferential starting of the water pumps in the water supply system.
4. A control method according to claim 3, wherein cyclically starting each water pump according to a mechanism for shortest priority start of total running time of water pumps in the water supply system comprises:
the total running time of each water pump is arranged in ascending order;
sequentially starting a water pump in the water supply system according to the ascending arrangement result;
and after each water pump is started in sequence, executing the steps in a circulating way.
5. The control method according to claim 1, characterized in that the control method further comprises:
acquiring a preset limiting value;
acquiring a preset period;
and calculating the first period and the second period according to the preset period and the preset limiting value.
6. The control method according to claim 5, characterized in that the calculating the first period and the second period from the preset period and the preset limit value includes:
calculating the first period T1 and the second period T2 according to the following formula:
T1=T/N；
T2=(T-T/N)+T；
wherein T is the preset period, and N is the preset limit value.
7. The control method according to claim 5, characterized in that the control method further comprises:
monitoring the working state of a water pump in the water supply system in real time;
determining whether the water pump has faults according to the working state of the water pump;
if yes, sending prompt information;
and after a preset time period, receiving failure release information, and setting the total running time of the new water pump to be zero if the failure release information contains the new water pump identification.
8. The control method according to claim 7, characterized in that the control method further comprises:
acquiring the number of the new water pumps and the number of the old water pumps; and
and calculating the second period according to the preset period, the number of the new water pumps, the number of the old water pumps and the preset limiting value.
9. The control method according to claim 8, wherein,
the calculating the first period according to the preset period and the preset limiting value comprises:
the first period T1 is calculated according to the following formula: t1=t/N;
the calculating the second period according to the preset period, the number of new water pumps, the number of old water pumps and the preset limiting value comprises:
the second period T2 is calculated according to the following formula: t2= (T-T/N) a/b+t;
wherein T is the preset period, N is the preset limiting value, A is the number of the new water pumps, and B is the number of the old water pumps.
10. The control method according to claim 5, characterized in that the control method further comprises:
and when the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold value, respectively modifying the first period and the second period into the preset period.
11. The control method according to claim 5, characterized in that the control method further comprises:
and when the difference value between the total running time of the first water pump and the total running time of each water pump is smaller than the preset threshold value, circularly starting each water pump in the water supply system in the preset period.
12. The control method according to claim 1, characterized in that the control method further comprises:
when the water supply system needs to stop M water pumps, determining the water pump with the longest total running time of M water pumps in the water supply system according to the total running time of each water pump, and preferentially stopping the M water pumps with the longest total running time, wherein M is a positive integer.
13. A water supply system applied to the control method for equalizing the total operation time of the water pump according to claim 1.
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