CN110258721B - Water supply method for combined secondary water supply and storage equipment - Google Patents

Water supply method for combined secondary water supply and storage equipment Download PDF

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CN110258721B
CN110258721B CN201910527056.5A CN201910527056A CN110258721B CN 110258721 B CN110258721 B CN 110258721B CN 201910527056 A CN201910527056 A CN 201910527056A CN 110258721 B CN110258721 B CN 110258721B
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water tank
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CN110258721A (en
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程立
高晓昆
刘新贵
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Chongqing Xinsheng Environmental Protection Technology Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B11/00—Arrangements or adaptations of tanks for water supply
    • E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
    • 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
    • E03B7/072—Arrangement of flowmeters
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other

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Abstract

The invention discloses a water supply method of combined secondary water supply and storage equipment, which comprises the following steps of step , calculating theoretical outlet flow A of a high-level water tank in days at different time periods, step two, calculating theoretical residual water quantity A of the high-level water tank at days at different time period starting times under the condition of given residence time, step three, calculating theoretical inlet flow and corrected inlet flow A of the high-level water tank in days at different time periods, step four, calculating the required closing specific time of an opened water pump in days at different time periods, step five, calculating corrected inlet flow B of a low-level water tank in days at different time periods, and step six, calculating the required closing specific time of an opened automatic valve in days at different time periods.

Description

Water supply method for combined secondary water supply and storage equipment
Technical Field
The invention relates to the field of secondary water supply of urban water supply network systems, in particular to a water supply method of combined secondary water supply and storage equipment.
Background
The chlorine disinfection method has the outstanding advantages that residual chlorine has a continuous disinfection effect, and the residual chlorine refers to the residual chlorine amount in water after chlorine is added and contacted for hours when the residual chlorine is disinfected by the chlorine.
The secondary water supply is a water supply mode for supplying water pressure and water quantity to users or self-using by storage, pressurization and other facilities through pipelines when the requirements of domestic and industrial building drinking water on water pressure and water quantity exceed the capacity of a public water supply network of a town or a self-building facility.
The water storage equipment is installed on the roof or the middle floor of a high-rise building, tap water in a city water supply pipe system is sent to the water storage equipment on the roof or the middle floor through a water pump in a pump room and then naturally flows to a user home, the water storage equipment is installed in the pump room, the tap water in the city water supply pipe system firstly flows into the water storage equipment in the pump room and then is directly pressurized and sent into the high-rise user home through a variable frequency water pump, the water storage equipment is installed at two positions to form combined water supply, position is installed in the pump room, position is installed on the roof or the middle floor of the high-rise building, the tap water in the city water supply pipe system firstly flows into the water storage equipment in the pump room and then is sent to the water storage equipment on the roof or the middle floor through the water pump in the pump room and then naturally flows to the user home, the water storage equipment installed on the roof or the middle floor of the high-rise building is also called a high-level water tank, and the water storage equipment installed in the pump room is also called a low-level water tank.
The third secondary water supply mode is characterized in that tap water flows into a low-level water tank by the pressure of a city water supply pipe network system and is conveyed to a high-level water tank by a water pump according to the regulation of 3.8.3 in the national standard GB50015-2003(2009 edition) building water supply and drainage design specifications, wherein the maximum water outlet of the water pump is not less than the maximum hourly water consumption when a high-level water tank is adopted for a building, the rated flow of the water pump is required to be considered to be greater than the maximum hourly water consumption of the high-level water tank when the water pump is selected, and for the low-level water tank, the hourly water consumption is greater than the hourly water consumption under the normal condition, but the hourly water consumption is less than the hourly water consumption at the peak water consumption time, and the water storage effect of the low-level water tank is reflected.
The flow rate of the tap water at time of the inlet of the water storage device is determined by a water pump, the flow rate of the tap water at time of the outlet of the water storage device is determined by the water consumption of a user served by the high-level water tank, the flow rate of the tap water at time of the low-level water tank is determined by the sum of the flow rates of all the inlets of the high-level water tanks for supplying water, the flow rate of the tap water reserved in the water storage device is determined by the flow rate of the tap water reserved in the water storage device, the flow rate of the tap water reserved in the water storage device is determined by the flow rate control valve in the water storage device, when the water level in the water storage device drops beyond a preset value, the flow rate control valve is opened and the tap water supply is started, when the water level control valve is closed and the water supply is stopped, the flow rate control method for controlling the flow rate of the tap water supply is not performed according to the flow rate of the water supply when the water level in the water storage device drops beyond the preset value, the flow rate control valve is closed and the flow rate of the tap water supply device is not increased according to the flow rate of the water supply when the water supply device is increased, the flow rate of the water supply time of the water supply device , the flow rate control method for controlling the water supply is performed according to the flow rate of the water supply device , the flow rate of the water supply device is not to the water supply of the water supply device, the flow rate of the water supply device is determined by the water supply device, the water supply device is determined by the water supply device, the water supply time of the water supply device, the water supply device is the water supply device, the water supply device is the water supply device, the water supply device is determined by the water supply time of the water supply device, the water supply device is determined by the water supply method.
In order to solve the technical problems, the prior art of Chinese patent publication No. CN105442670B discloses building water supply pipeline circulating systems and methods for secondary water supply water quality assurance in 2017, 9.1.A system comprises a building water supply service pipe, a lifting or water storage device, a flow metering or detecting device, a backflow controller, a building water supply vertical pipe, a building indoor pipeline and faucet, a backflow pipe, an ultraviolet/titanium dioxide sterilizer, a backflow electromagnetic valve and a check valve.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a water supply method of combined secondary water supply and storage equipment, which can supply water quantitatively to a high-level water tank and a low-level water tank respectively, solves the problem of quantitative control of the residence time of tap water in the storage equipment, reduces the risk of microorganism index exceeding caused by overlong residence time of tap water in the storage equipment to the maximum extent, and has the advantages of small change of the existing equipment, convenient implementation and low energy consumption, maintenance cost and operation cost in actual operation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
A water supply method for combined secondary water supply and storage equipment is characterized in that the combined secondary water supply and storage equipment comprises a low-level water tank and at least a high-level water tank, an automatic valve is arranged at the water inlet end of the low-level water tank, and a water pump is arranged at the water inlet end of each high-level water tank;
the water supply method comprises the following steps:
, calculating theoretical outlet flow A of the high-level water tank in different time periods of days according to historical data of outlet flow in recent days;
step two, calculating theoretical retained water quantity A of the high-level water tank at the starting time of different time periods of days under the condition of given retention time according to the obtained theoretical outlet flow A;
calculating theoretical inlet flow and corrected inlet flow A of the high-level water tank in days in different time periods according to the obtained theoretical outlet flow A and the theoretical residual water quantity A;
step four, sending a control signal instruction whether to start water supply to the high-level water tank to the water pump according to the corrected inlet flow A at the starting time of days in different time periods, if the water supply needs to be started, calculating the specific time when the started water pump needs to be closed in the time period, closing the water pump to stop water supply according to the calculation result, completing the water supply of the high-level water tank in the time period, and completing the water supply of the high-level water tank for days in a circulating manner;
calculating theoretical outlet flow B of the low-level water tank according to theoretical inlet flow of the high-level water tank, calculating theoretical residual water quantity B of the low-level water tank at the starting time of days in different time periods under the condition of given retention time according to the theoretical outlet flow B, obtaining the residual water quantity B of the low-level water tank according to the obtained theoretical outlet flow B and the theoretical residual water quantity B by combining real-time detection, and calculating corrected inlet flow B of the low-level water tank in days in different time periods;
step six, sending a control signal instruction whether to open the water supply to the low-level water tank to the automatic valve according to the corrected inlet flow B at the starting time of days in different time periods, if the water supply needs to be opened, calculating the specific time when the opened automatic valve needs to be closed in the time period, closing the automatic valve to stop the water supply according to the calculation result, completing the water supply of the low-level water tank in the time period, and completing the water supply of the low-level water tank days in a circulating manner.
And in the third step, the corrected inlet flow A of the high-level water tank in different time periods of days is calculated by combining the theoretical outlet flow A and the theoretical residual water quantity A and detecting the residual water quantity A of the high-level water tank in real time.
Equally dividing a balance into N time periods, using i to represent the sequence number of different time periods in days, and calculating by using the outlet flow of the high-level water tank detected in the last continuous E days, wherein the theoretical outlet flow A in the step is as follows:
Figure GDA0002286795790000041
Figure GDA0002286795790000042
wherein, in the formula (1)
Figure GDA0002286795790000043
Showing the outlet flow of the high level water tank obtained by detection, d showing the sequence number of continuous dates, d/i showing the time period i with the date of d, which is called d/i time period for short, c showing the sequence number of the outlet flow of the high level water tank measured in the d/i time period, Ad/iRepresenting the total number of head tank outlet flows measured during the d/i time period,
Figure GDA0002286795790000044
the arithmetic mean value of all the detected outlet flows of the high-level water tank in the d/i time period is represented; in the formula (2)
Figure GDA0002286795790000045
Indicating the calculated i timeTheoretical outlet flow A of the section is calculated in the time section i for continuous days EIs calculated as the average of the counts.
The method for calculating the theoretical retained water amount A in the step two comprises the following steps of using M to represent the total time length of days, dividing a balance into N time periods, using M/N to represent the time length of each time period, using i to represent the sequence number of different time periods in days, and then:
Figure GDA0002286795790000051
Figure GDA0002286795790000052
Figure GDA0002286795790000053
m in formula (5)iCalculated by the formula (6) below:
wherein, W in the formula (3)1Indicating the minimum amount of water left in the head tank, the parameter being set to ensure a user-based demand for water, β being a set minimum water factor,
Figure GDA0002286795790000056
the average value of the total water flowing out of the high-level water tank for days is calculated according to historical data;
in the formula (4)
Figure GDA0002286795790000057
Representing n consecutive from the time period iiOne hourThe maximum sum of the water outflow of the high-level water tank is set to ensure that the tap water in the high-level water tank can at least meet the requirement of the user on using niA time period; mod is the remainder operator; ((i + a-2) mod N +1) represents a period (i + a-1) in such a manner as to satisfy the requirement that the period expression (i + a-1) cannot exceed the total number N of periods;
Figure GDA0002286795790000058
indicates that all of the components in the same time period (i + a-1)
Figure GDA0002286795790000059
Maximum value of (1);
in the formula (5)
Figure GDA00022867957900000510
Representing m successive from time period iiThe sum of theoretical outflow water of the high-level water tank in each time period;
t in formula (6)iRepresents a given dwell time at the start of the i period;
w in formula (7)a/iAnd the theoretical residual water quantity A of the high-level water tank at the starting moment of the time period i under the condition of the given retention time is obtained through calculation, and max { } is an operator for solving the maximum value.
The calculation method of the theoretical inlet flow and the corrected inlet flow A in the third step respectively comprises the following steps:
Figure GDA00022867957900000511
wherein in the formulas (8) and (9), Vi 3/jThe calculated theoretical inlet flow of the high-level water tank in the time period i is used for calculating the theoretical outlet flow of the low-level water tank, and j represents the sequence number of the high-level water tank; vi 2Indicating the corrected inlet flow A, W of the high-level cistern during time period ib/iRepresenting the amount of water remaining in the head tank at the start of the i period detected in real time by multiplying water level data obtained by real-time detection by a water level meter installed in the head tank by a conversion coefficient of data collected per minute, and Wa/(i mod N+1)For the calculated theoretical retained water amount a of the head tank at the beginning of the (i +1) time period, (i +1) is represented by (imod N +1) in order to satisfy the requirement that the time period expression (i +1) cannot exceed the total number N of time periods.
The fourth step includes a method for starting the water pump and a method for calculating the specific time when the started water pump needs to be closed in the time period, which respectively comprise the following steps:
the starting method of the water pump comprises the following steps that at the starting time of days in different time periods, when V is equal to Vi 2When the water level is equal to 0, a control signal instruction for not starting water supply to the high-level water tank is sent to the water pump, and when V isi 2When the water supply quantity is not equal to 0, a control signal instruction for starting water supply to the high-level water tank is sent to the water pump;
the method for calculating the specific time when the started water pump needs to be closed in the time period comprises the following steps:
Figure GDA0002286795790000062
wherein, t in the formula (10)iIndicating the specific moment that the water pump needs to be shut down during the period i, and R indicating the rated flow of the water pump.
The calculation method of the theoretical outlet flow B in the fifth step comprises the following steps:
Figure GDA0002286795790000063
wherein, V in formula (11)i d1And the theoretical outlet flow B of the low-level water tank in the time period i is shown, and the g represents the total number of the high-level water tanks.
The calculation method of the theoretical retained water amount B in the fifth step comprises the following steps:
Figure GDA0002286795790000064
Figure GDA0002286795790000065
m in formula (13)iCalculated from the formula (14) below:
Figure GDA0002286795790000071
wherein, W in formula (12)d1The minimum water remaining quantity of the low level water tank is represented, the parameter is set to ensure the water requirement of a user base, delta is a set minimum water quantity coefficient,
Figure GDA0002286795790000073
the average value of the total water flowing out of the low-level water tank for days is calculated according to the theoretical outlet flow of the low-level water tank;
in the formula (13)Representing m successive from time period iiThe sum of theoretical outflow water of the low-level water tank in each time period;
in formula (14)
Figure GDA0002286795790000075
Represents a given dwell time at the start of the i period;
in the formula (15)
Figure GDA0002286795790000076
And the theoretical residual water quantity B of the low-level water tank at the starting moment of the time period i under the condition of the given retention time is obtained through calculation, and max { } is an operator for solving the maximum value.
The calculation method for correcting the inlet flow B in the fifth step comprises the following steps:
Figure GDA0002286795790000077
wherein, V in formula (16)i d2The corrected inlet flow B of the low-level water tank in the time period i is obtained through calculation;
Figure GDA0002286795790000078
representing the residual water quantity of the low water tank at the starting moment of the time period i, which is obtained by real-time detection, and calculating by multiplying water level data by a conversion coefficient, wherein the water level data is obtained by real-time detection of a water level meter arranged in the low water tank, data are collected every minute, and the conversion coefficient is a coefficient for converting the water level data into the residual water quantity data;
Figure GDA0002286795790000079
the theoretical water retention amount B of the low water tank at the starting time of the (i +1) time period is obtained by calculation, and the (i +1) is represented by (i mod N +1) so as to meet the requirement that the time period expression (i +1) cannot exceed the total number N of the time periods.
Step six includes the method of opening the automatic valve and the method of calculating the specific time at which the opened automatic valve needs to be closed during the time period, which are respectively:
the automatic valve is opened at the beginning of days in different time periodsi 2When the value is equal to 0, a control signal command for not opening the water supply to the lower tank is sent to the automatic valve , and when V is seti 2When the water supply amount is not equal to 0, a control signal instruction for opening the water supply to the low-level water tank is sent to the automatic valve ;
the method for calculating the specific time when the opened automatic valve needs to be closed in the time period comprises the steps of detecting the inlet flow rate entering the low level water tank by a flow meter after the automatic valve is opened, calculating the supplied water amount in the time period times every inlet flow rate data are detected, comparing the calculated supplied water amount with the theoretical supplied water amount in the time period, sending a control signal to instruct the automatic valve to close to stop supplying water if the calculated supplied water amount is more than or equal to the theoretical supplied water amount before the time period is ended, and stopping calculation and comparison when the time period is ended:
Figure GDA0002286795790000082
Figure GDA0002286795790000083
Figure GDA0002286795790000084
wherein, in formula (17)
Figure GDA0002286795790000085
Indicating the supplied water amount of the lower tank during the i period,the flow meter is characterized by representing the inlet flow of a low-level water tank in the time period i obtained through real-time detection, r is the sequence number of inlet flow data of the low-level water tank in the time period i obtained through real-time detection, h represents the total number of the inlet flow data of the low-level water tank in the time period i obtained through real-time detection, and t represents inlet flow data of the low-level water tank given by the flow meter at intervals of t time;
w in formula (18)i d5Representing the theoretical water supply amount of the low level water tank in the period i;
in the formula (20)
Figure GDA0002286795790000087
Indicating the specific time at which the automatic valve needs to be closed during time i, h0Indicating th occurrence
Figure GDA0002286795790000088
The value of time h.
The invention has the advantages that:
the invention is particularly used for a combined secondary water supply mode comprising a low-level water tank and a high-level water tank, changes the existing control method of the residual water quantity, realizes the quantitative calculation of the residual water quantity according to the given retention time by finding the quantitative relation between the residual water quantity and the retention time of tap water in water storage equipment, calculates the inlet flow according to the calculated residual water quantity, and can realize the quantitative control of the retention time of the tap water in the water storage equipment by supplying water to the high-level water tank and the low-level water tank according to the calculated inlet flow. The problem of quantitative control of the residence time of tap water in the water storage equipment is solved, the risk of exceeding the standard of microorganism indexes caused by overlong residence time of tap water in the water storage equipment is reduced to the maximum extent, the existing equipment is slightly changed, the implementation is convenient, and the energy consumption, the maintenance cost and the operation cost in actual operation are very low.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a functional diagram of embodiment 1 of the present invention.
Fig. 3 is a graph of the theoretical outlet flow rate a of the head tank a calculated in embodiment 2 of the present invention at different time periods of days.
Fig. 4 is a graph of the theoretical outlet flow rate a of the head tank B calculated in embodiment 2 of the present invention at different time periods of days.
Fig. 5 is a graph of the variation of the theoretical outlet flow B of the lower tank calculated according to the theoretical outlet flow a of the higher tank in days in different time periods in embodiment 2 of the present invention.
Marked as 1, an intelligent controller, 2, automatic valves , 3, flow meters C, 4, a low level water tank, 5, water level meters C, 6, flow meters D, 7, water pumps A, 8, water pumps B, 9, high level water tanks A, 10, water level meters A, 11, flow meters A, 12, high level water tanks B, 13, water level meters B, 14, flow meters B, 15, an external forced controller, 16, a data acquisition unit, 17, a data storage unit, 18, a data processing unit, 19 and a control unit.
Detailed Description
Example 1
The embodiment provides a combined secondary water supply and storage device water supply method, the combined secondary water supply and storage device water supply method comprises a control system, low-level water tank 4 and at least high-level water tank, a flow meter and an automatic valve are arranged at the water inlet end of the low-level water tank 4, flow meters are arranged at the water outlet end of the low-level water tank 4 and the water outlet end of each high-level water tank, water quantity detection devices are arranged in the low-level water tank 4 and each high-level water tank, a water pump is arranged at the water inlet end of each high-level water tank, the control system comprises an external forcing controller 15 and an intelligent controller 1, the intelligent controller 1 comprises a data acquisition unit 16, a data storage unit 17, a data processing unit 18 and a control unit 19, the data acquisition unit 16 is respectively connected with all the water quantity detection devices and all flow meters in a wired or wireless mode, the data storage unit 17 is respectively connected with the data acquisition unit 16, the data processing unit 18 and the control unit 19, the control unit 19 is respectively connected with the data acquisition unit 16, the external forcing controller water level detection device water pump and the automatic valve , the industrial computer water level detection device is preferably connected with a PLC 732, the industrial computer PLC for sending a remote control system water supply device PLC for sending system for sending a remote control system water supply system for the industrial computer for sending a remote industrial computer for the.
For convenience of illustration, the present embodiment preferably includes two head tanks, as shown in fig. 1, and for convenience of distinction, the two head tanks are respectively set as a head tank a9 and a head tank B12, the water pumps are respectively set as a water pump a7 and a water pump B8, the water level meters are respectively set as a water level meter a10, a water level meter B13 and a water level meter C5, and the flow meters are respectively set as a flow meter a11, a flow meter B14, a flow meter C3 and a flow meter D6. Specifically, a flowmeter A and a flowmeter B are respectively arranged at the outlets of the high-level water tank A and the high-level water tank B, and a flowmeter C and a flowmeter D are respectively arranged at the outlets of the high-level water tank A and the high-level water tank BInstalled at the inlet and outlet of the low level water tank 4, each flow meter obtains flow data per minute in m3A water level meter A10 and a water level meter B13 are respectively arranged inside a high-level water tank A9 and a high-level water tank B12, a water level meter C5 is arranged inside a low-level water tank 4, the water level meters are water quantity detection devices, each water level meter obtains water level data per minute in cm and transmits the data to the intelligent controller 1 in real time, a data processing unit 18 of the intelligent controller 1 automatically converts the water level data into corresponding water storage quantity data in m3The intelligent water pump system comprises a water pump A7 and a water pump B8 which are connected in parallel, wherein the water pump A7 and the water pump B8 are arranged behind an outlet of a low-level water tank 4 in a pump room and can receive a 'turn-on' or 'turn-off' control signal instruction sent by an intelligent controller 1 and switch on and off corresponding water pumps according to the control signal instruction, an automatic valve 2 is arranged in front of a flow meter C3 and can receive the 'turn-on' or 'turn-off' control signal instruction sent by the intelligent controller 1 and switch on and off an automatic valve 2 according to the control signal instruction, the intelligent controller 1 is arranged outside a secondary water supply facility and has the functions of data acquisition, data storage, data processing, data and instruction receiving and data sending, data and instruction sending, and parameter instruction changing instructions needing manual setting, the external force controller 15 is arranged outside the secondary water supply facility and is used for sending software upgrading version data and upgrading instructions to the intelligent controller 1 and sending various parameter data and parameter changing instructions needing manual setting to the intelligent controller 1, receiving all data and alarm signal data stored by the intelligent controller 1 and sending control instructions of appointed equipment needing turning.
In this embodiment, the data acquisition function of the intelligent controller is realized by a data acquisition unit in the intelligent controller, and the data acquisition unit acquires the flow data and the reserved water volume data of each water storage device in real time in a wired or wireless transmission mode.
The data storage function of the intelligent controller is realized through a data storage unit in the intelligent controller, the data storage unit can store flow data and residual water volume data of each water storage device acquired by a data acquisition unit in real time, can store calculation results of a data processing unit, can store control signal instructions received or sent by the control unit, can store software upgrading version data and upgrading instructions received by the control unit, and can store various parameter data and parameter changing instructions thereof received by the control unit, wherein the parameter data and the parameter changing instructions need to be manually set.
The function of receiving data and instructions of the intelligent controller is realized through a control unit in the intelligent controller, and the control unit remotely receives software upgrading version data and upgrading instructions sent by an external mandatory controller, various parameter data needing manual setting and parameter changing instructions thereof, and control signal instructions for turning on or turning off specified equipment in a wired mode on site in a wireless transmission mode.
The function of sending data and instructions of the intelligent controller is realized by a control unit in the intelligent controller, the control unit sends an 'on' or 'off' control signal instruction to the designated equipment in a wired or wireless transmission mode according to a preset rule or receives a control signal instruction of an external mandatory controller, and all data and alarm signal data stored in the intelligent controller are sent to the external mandatory controller according to the preset rule.
The data processing function of the intelligent controller is realized by a data processing unit in the intelligent controller, and the data processing unit can perform the following calculation of 1) data conversion, namely multiplying the received data by coefficients for storage, including unit conversion and water storage device water level data conversion into water storage device water retention amount data, 2) theoretical outlet flow of the high-level water tank in different time periods of days, 3) theoretical water retention amount of the high-level water tank in different time period starting times of days under the condition of given residence time, 4) theoretical inlet flow and corrected inlet flow of the high-level water tank in different time periods of days, 5) specific time of the water pump needing to be closed in different time periods of days, 6) theoretical outlet flow of the low-level water tank in different time periods of days, 7) theoretical water retention amount of the low-level water tank in different time period starting times of days under the condition of given residence time, 8) corrected inlet flow of the low-level water tank in different time periods of days, and 9) specific time of the opened automatic valve needing to be closed in different time periods of days.
Specifically, the water supply method comprises the following steps:
and , calculating theoretical outlet flow A of the high-level water tank in different time periods of days according to historical data of outlet flow of a plurality of recent days, and specifically calculating the theoretical outlet flow of the high-level water tank in different time periods of days by the intelligent controller according to the historical data of outlet flow of the recent 20-40 days.
In the step, the calculation method of the theoretical outlet flow A comprises the steps of equally dividing an balance into N time periods, using i to represent the sequence number of different time periods in days, and calculating by using the outlet flow of the high-level water tank detected in the last continuous E days, wherein the method comprises the following steps:
Figure GDA0002286795790000121
Figure GDA0002286795790000122
wherein, in the formula (1)
Figure GDA0002286795790000123
Showing the outlet flow of the high level water tank obtained by detection, d showing the sequence number of continuous dates, d/i showing the time period i with the date of d, which is called d/i time period for short, c showing the sequence number of the outlet flow of the high level water tank measured in the d/i time period, Ad/iRepresenting the total number of head tank outlet flows measured during the d/i time period,
Figure GDA0002286795790000124
the arithmetic mean value of all the detected outlet flows of the high-level water tank in the d/i time period is represented; in the formula (2)
Figure GDA0002286795790000125
The theoretical outlet flow A representing the calculated i time period isAll calculated for time period i for consecutive days E
Figure GDA0002286795790000126
The arithmetic mean value of the time sequence reflects the change rule of the outlet flow of the high-level water tank in different time periods of days.
And step two, calculating the theoretical retained water quantity A of the high-level water tank at the starting time of different time periods of days under the condition of given retention time by the intelligent controller according to the obtained theoretical outlet flow A.
In the step, the theoretical retained water quantity A is calculated by using M to represent the total time length of days, dividing a balance into N time periods, using M/N to represent the time length of each time period, using i to represent the sequence number of different time periods in days,
Figure GDA0002286795790000127
and
Figure GDA0002286795790000128
as before, then:
Figure GDA00022867957900001210
Figure GDA00022867957900001211
m in formula (5)iCalculated by the formula (6) below:
Figure GDA00022867957900001212
wherein, W in the formula (3)1Indicating the minimum amount of water left in the head tank, which isThe parameters are set to ensure a user-based water usage requirement, β is a set minimum water factor,
Figure GDA00022867957900001214
the average value of the total water flowing out of the high-level water tank for days is calculated according to historical data;
in the formula (4)
Figure GDA0002286795790000131
Representing n consecutive from the time period iiThe sum of the maximum water flow of the high-level water tank in each time period is set to ensure that tap water in the high-level water tank can at least meet the requirement of n used by a useriA time period; mod is the remainder operator; ((i + a-2) mod N +1) represents a period (i + a-1) in such a manner as to satisfy the requirement that the period expression (i + a-1) cannot exceed the total number N of periods;
Figure GDA0002286795790000132
indicates that all of the components in the same time period (i + a-1)Maximum value of (1);
in the formula (5)Representing m successive from time period iiAnd the theoretical outflow water quantity of the high-level water tank in each time period is calculated according to the theoretical outlet flow of the same time period.
T in formula (6)iThe given retention time of the starting time of the time period i is represented by time periods artificially given for ensuring the water quality safety, the starting time of the time period is the starting time of the time period i, the residual water quantity at the starting time of the time period i completely flows out of the high-level water tank after the time period, the given retention time is a key parameter for realizing quantitative calculation of the residual water quantity, the residual water quantity of the high-level water tank is determined according to the given retention time, and the tap water in the high-level water tank can be ensured to stay at the given retention timeAll the water flows out of the high-level water tank within the normal variation range, and T is set for convenient calculationiIs an integer multiple of the time period duration.
W in formula (7)a/iThe theoretical residual water quantity A of the high-level water tank at the starting moment of the time period i under the condition of given retention time is obtained through calculation, wherein the theoretical residual water quantity A is used for distinguishing the residual water quantity of the high-level water tank obtained through actual detection and particularly refers to the residual water quantity of the high-level water tank obtained through calculation; max { } is the operator for maximum value.
And step three, calculating theoretical inlet flow and corrected inlet flow A of the high-level water tank in days in different time periods according to the obtained theoretical outlet flow A and the theoretical retained water quantity A, calculating the corrected inlet flow A of the high-level water tank in days in different time periods according to the theoretical outlet flow A and the theoretical retained water quantity A by combining real-time detection to obtain the retained water quantity A of the high-level water tank, specifically, calculating the theoretical inlet flow of the high-level water tank in days in different time periods by the intelligent controller after the theoretical outlet flow A and the theoretical retained water quantity A are obtained by calculation, and calculating the corrected inlet flow A of the high-level water tank in days in different time periods according to the obtained theoretical outlet flow A and the theoretical retained water quantity A at the beginning time of days in different time periods and by combining real-time detection with a water level meter.
In this step, the calculation methods of the theoretical inlet flow and the corrected inlet flow a are respectively as follows:
Figure GDA0002286795790000141
Figure GDA0002286795790000142
wherein in the formulas (8) and (9), Vi 3/jThe calculated theoretical inlet flow of the high-level water tank in the time period i is used for calculating the theoretical outlet flow of the low-level water tank, and j represents the sequence number of the high-level water tank; vi 2Indicating the corrected inlet flow A of the high-level cistern at time period i for calculating the flow to the high-level cisternThe running time of a water pump supplying water; wb/iRepresenting the residual water quantity W of the high-level water tank obtained by real-time detection and conversion at the beginning time of the time period ia/(i mod N+1)For the calculated theoretical amount a of water remaining in the head tank at the beginning of the (i +1) time period, (i +1) is represented by (i mod N +1) in order to satisfy the requirement that the time period expression (i +1) cannot exceed the total number N of time periods.
W in formula (9)b/iCalculated from the following formula:
Wb/i＝α×H
wherein H is water level data which is obtained by real-time detection of a water level meter arranged in a high-level water tank and data are collected every minute, α is a conversion coefficient which is used for converting the water level data into water storage volume data, namely the sectional area of the water storage equipment, and only a unit needs to be considered, so that the conversion coefficient is obtained by dividing the sectional area of the water storage equipment by 100.
And fourthly, sending a control signal instruction whether to start water supply to the high-level water tank or not to the water pump by the intelligent controller at the starting time of days in different time periods according to the corrected inlet flow A, if the water supply needs to be started, calculating the specific time when the started water pump needs to be closed in the time period by the intelligent controller, closing the water pump to stop the water supply according to the calculation result, completing the water supply of the high-level water tank in the time period, and completing the water supply of the high-level water tank for days in a circulating manner.
The method comprises a method for starting the water pump and a method for calculating the specific time when the started water pump needs to be closed in the time period, wherein the method comprises the following steps:
the starting method of the water pump comprises the following steps that at the starting time of days in different time periods, when V is equal to Vi 2When the water supply quantity is equal to 0, the intelligent controller sends a control signal instruction for not starting to supply water to the high-level water tank to the water pump, and when V is equal to 0i 2When the water supply amount is not equal to 0, the intelligent controller sends a control signal instruction for starting water supply to the high-level water tank to the water pump.
The method for calculating the specific time when the started water pump needs to be closed in the time period comprises the following steps:
Figure GDA0002286795790000151
wherein, t in the formula (10)iIndicating the specific moment that the water pump needs to be shut down during the period i, and R indicating the rated flow of the water pump.
And step five, calculating theoretical outlet flow B of the low-level water tank according to theoretical inlet flow of the high-level water tank, calculating theoretical residual water quantity B of the low-level water tank at the starting time of days in different time periods under the condition of given retention time according to the theoretical outlet flow B, obtaining the residual water quantity B of the low-level water tank by combining real-time detection according to the obtained theoretical outlet flow B and the theoretical residual water quantity B, calculating inlet flow of the low-level water tank in the time period at the starting time of days, and calculating corrected inlet flow B of the low-level water tank in days in different time periods according to the corrected inlet flow B.
In this step, the method for calculating the theoretical outlet flow B is as follows:
Figure GDA0002286795790000152
wherein, V in formula (11)i d1Representing theoretical outlet flow B, V of the low level water tank in the period ii 3/jG represents the total number of the high-level water tanks.
In the step, the theoretical residual water quantity B is calculated by using M to represent the total time length of days, dividing a balance into N time periods, using M/N to represent the time length of each time period, using i to represent the sequence number of different time periods in days, and using Vi d1As before, then:
Figure GDA0002286795790000153
Figure GDA0002286795790000154
m in formula (13)iCalculated from the formula (14) below:
Figure GDA0002286795790000155
wherein, W in formula (12)d1The minimum water remaining quantity of the low level water tank is represented, the parameter is set to ensure the water requirement of a user base, delta is a set minimum water quantity coefficient,
Figure GDA0002286795790000157
the average value of the total water flowing out of the low level water tank for days is calculated according to the theoretical outlet flow of the low level water tank.
In the formula (13)
Figure GDA0002286795790000161
Representing m successive from time period iiAnd the theoretical outflow water quantity of the low-level water tank in each time period is calculated according to the theoretical outlet flow of the same time period.
T in formula (14)i dThe given retention time of the starting time of the time period i is represented by time periods artificially given for ensuring the water quality safety, the starting time of the time period is the starting time of the time period i, the residual water quantity at the starting time of the time period i completely flows out of the low-level water tank after the time period, the given retention time is a key parameter for realizing quantitative calculation of the residual water quantity, the residual water quantity of the low-level water tank is determined according to the given retention time, the tap water in the low-level water tank can be ensured to completely flow out of the low-level water tank within the normal variation range of the given retention time, and T is set for convenient calculationi dIs an integer multiple of the time period duration.
In the formula (15)
Figure GDA0002286795790000162
And the theoretical residual water quantity B of the low-level water tank at the starting moment of the time period i under the condition of the given retention time is obtained through calculation, and max { } is an operator for solving the maximum value.
In the step, the calculation method for correcting the inlet flow B comprises the steps of using M to represent the total time length of days, dividing a balance into N time periods, using M/N to represent the time length of each time period, using i to represent the sequence number of different time periods in days, and using mod and Vi d1And
Figure GDA0002286795790000163
as before, then:
Figure GDA0002286795790000164
wherein, V in formula (16)i d2The corrected inlet flow B of the low-level water tank in the time period i is obtained through calculation;
Figure GDA0002286795790000165
the method comprises the steps of representing the residual water quantity of a low-level water tank obtained by real-time detection at the starting moment of a time period i, and calculating the water level data by multiplying a conversion coefficient, wherein the conversion coefficient is a coefficient for converting the water level data into the residual water quantity data;the theoretical water retention amount B of the low water tank at the starting time of the (i +1) time period is obtained by calculation, and the (i +1) is represented by (i mod N +1) so as to meet the requirement that the time period expression (i +1) cannot exceed the total number N of the time periods.
Step six, sending a control signal instruction whether to open the water supply to the low-level water tank to the automatic valve by the intelligent controller according to the corrected inlet flow B at the starting time of days in different time periods, if the water supply needs to be opened, calculating the specific time when the opened automatic valve needs to be closed in the time period by the intelligent controller, closing the automatic valve to stop the water supply according to the calculation result, completing the water supply of the low-level water tank in the time period, and completing the water supply of the low-level water tank for days in a circulating manner.
This step includes the method of opening the automatic valve and the method of calculating the specific time at which the opened automatic valve needs to be closed during that time period, respectively:
the automatic valve is opened at the beginning of days in different time periodsi 2When the value is equal to 0, the intelligent controller sends a control signal instruction for not opening the water supply to the low-level water tank to the automatic valve , and when V isi 2When the water supply amount is not equal to 0, the intelligent controller sends a control signal instruction for starting the water supply to the low-level water tank to the automatic valve ;
the method for calculating the specific time when the opened automatic valve needs to be closed in the time period comprises the steps of detecting the inlet flow rate entering the low level water tank by a flow meter after the automatic valve is opened, calculating the supplied water amount of the time period times by the intelligent controller every time inlet flow rate data are detected, comparing the calculated supplied water amount with the theoretical supplied water amount of the time period, if the calculated supplied water amount is greater than or equal to the theoretical supplied water amount before the time period is ended, sending a control signal to the intelligent controller to close the automatic valve to stop supplying water, and stopping calculating and comparing when the time period is ended, then:
Figure GDA0002286795790000171
Figure GDA0002286795790000172
Figure GDA0002286795790000173
Figure GDA0002286795790000174
wherein M represents the total time length of days, N represents the average division of the balance into N time periods, M/N represents the time length of each time period, i represents the sequence number of different time periods in days, and in the formula (17)
Figure GDA0002286795790000175
Indicating the supplied water amount of the lower tank during the i period,
Figure GDA0002286795790000176
the method comprises the steps of representing the inlet flow of a low-level water tank in the time period i obtained through real-time detection, wherein r is the sequence number of inlet flow data of the low-level water tank in the time period i obtained through real-time detection, h represents the total number of the inlet flow data of the low-level water tank in the time period i obtained through real-time detection, t represents inlet flow data of the low-level water tank given by a flowmeter at intervals of t, t is required to be far shorter than the time period of the time period, and the time period is integral multiple of t.
W in formula (18)i d5Indicating the theoretical water supply of the lower tank during the i period.
In the formula (20)
Figure GDA0002286795790000177
Indicating the specific time at which the automatic valve needs to be closed during time i, h0Indicating th occurrence
Figure GDA0002286795790000178
The value of time h.
, when the water pump is in off state, the intelligent controller control unit sends the 'on' control signal command according to the rule that 1) for the high level water tank corresponding to the water pump, at the beginning of each time period, when the calculated V isi 2Greater than zero; 2) when receiving the control signal command of turning on the water pump sent from the external forced controller.
, when the water pump is on, the intelligent controller sends the command of 'off' control signal to 1) for the high level water tank corresponding to the water pump, when t is calculatediIf not, then at tiClosing the water pump at any time; 2) when receiving a control signal command of turning off the water pump sent from an external forced controller.
, when the automatic valve is closed, the intelligent controller control unit sends the "on" control signal command to 1) turn on the low level tank every time periodAt the beginning of time, when V is calculatedi d2Greater than zero, 2) upon receiving a command from the external force controller to "open" the automatic valve .
, when the automatic valve is in the open state, the controller can command the control unit to turn off the control signal by 1) if the command is calculated before the end of a certain period of time for the low level tank
Figure GDA0002286795790000181
Then is at
Figure GDA0002286795790000182
Time to close the automatic valve , 2) upon receiving a command from the external force controller to "close" the automatic valve .
Example 2
Based on example 1, this embodiment is described in with specific data, and the volume of a certain head tank a is set to be 4 × 3 × 3 ═ 36m3If so, the conversion coefficient for converting the water level data into the retained water amount is 0.12; the volume of the high-level cistern B is 4 × 3.5 × 3 ═ 42m3The conversion coefficient for converting the water level data into the retained water amount is 0.14, and the volume of the low level tank is 6 × 4 × 3 to 72m3If so, the conversion coefficient for converting the water level data into the reserved water amount is 0.24; wb/iAnd
Figure GDA0002286795790000183
respectively obtaining the residual water quantity of the high-level water tank and the low-level water tank at the beginning time of the time period i through real-time detection and conversion, wherein the unit is m3. Therefore, the temperature of the molten metal is controlled,
for the high level tank a: wb/i＝0.12×H
For the high level tank B: wb/i＝0.14×H
For a low level tank:
Figure GDA0002286795790000184
h is water level data, is obtained through real-time detection of a water level meter installed in water storage equipment, data are collected every minute, and the unit is cm.
In particular, the method for calculating the theoretical outlet flow rate a in the step includes the steps of dividing a balance into 24 time periods, using i to represent the sequence number of different time periods in days, and calculating by using the outlet flow rate of the high-level water tank detected in the last 30 consecutive days, wherein:
Figure GDA0002286795790000191
Figure GDA0002286795790000192
wherein, in the formula (1)
Figure GDA0002286795790000193
The flow of the outlet of the high-level water tank obtained by detection is detected in real time through a flow meter arranged at the outlet of the high-level water tank, data are collected every minute, and the unit is m3D represents the sequential number of continuous days, d/i represents the time segment i of the day with the date d, which is called d/i time segment for short, c represents the sequential number of the outlet flow of the high-level water tank measured in the d/i time segment, Ad/iWhich represents the total number of head tank outlet flows measured during the d/i time period, which in this embodiment is 60 per time period,
Figure GDA0002286795790000194
the arithmetic mean value of all the detected outlet flows of the high-level water tank in the d/i time period is expressed in m3H; in the formula (2)
Figure GDA0002286795790000195
The theoretical outlet flow A of the i time period is calculated for all the calculated theoretical outlet flow A of the i time period for 30 daysThe arithmetic mean value of (1) reflects high-level waterThe change rule of the tank outlet flow in different time periods of days, the calculation result of the high-level water tank A is shown in figure 3, and the calculation result of the high-level water tank B is shown in figure 4.
The method for calculating the theoretical retained water quantity A in the step two comprises the steps of dividing a balance into 24 time periods with the total time length of days being 24h, dividing each time period into 1h, using i to represent the sequence number of different time periods in days,and
Figure GDA0002286795790000198
as before, then:
for the high level tank a:
Figure GDA0002286795790000199
Figure GDA00022867957900001910
w in formula (3)1The lowest water retention quantity of the high-level water tank is expressed in m3The parameter is set to ensure the most basic water demand of the user, the minimum water quantity coefficient is set to be 0.07, and the average value of the total water quantity flowing out of the high level water tank days calculated according to historical data is 121m3。
In the formula (4)
Figure GDA00022867957900001911
The sum of the maximum values of the outflow water quantity of the high-level water tank in 2 continuous time periods from the time period i is represented, and the tap water in the high-level water tank at least can meet the requirement of a user for using 2 time periods; mod is the remainder operator; ((i + a-2) mod24+1) represents a time period (i + a-1) in such a way as to satisfy the requirement that the time period expression (i + a-1) cannot exceed the total number of time periods 24;
Figure GDA0002286795790000201
at the same time period of (All of (i + a-2) mod24+1)Maximum value of (2).
Figure GDA0002286795790000203
Wherein the value 3 is calculated by the following formula:
mi＝3/1＝3 (6)
in the formula (5)
Figure GDA0002286795790000204
Setting the given retention time of each time period to be 3h, wherein the given retention time refers to periods of artificially given time length for ensuring the water quality safety, the starting time of the period is the starting time of the time period i, the retained water quantity at the starting time of the time period i completely flows out of the high-level water tank after the period, the given retention time is a key parameter for realizing quantitative calculation of the retained water quantity, and the retained water quantity of the high-level water tank is determined according to the given retention time, so that the tap water in the high-level water tank can be ensured to completely flow out of the high-level water tank within the normal variation range of the given retention time.
Figure GDA0002286795790000205
W in formula (7)a/iThe theoretical residual water quantity A of the high-level water tank at the starting moment of the time period i under the condition that the given retention time is 3 hours is obtained through calculation, wherein the theoretical residual water quantity A is used for distinguishing the actual detected residual water quantity of the high-level water tank and specifically refers to the calculated residual water quantity of the high-level water tank; max { } is the operator for maximum value.
The following table shows the calculation of W for days in a certain high-level water tank A in the embodiment1、
Figure GDA0002286795790000206
And Wa/iAs a result, the shaded area indicates that the area value is adopted;
Figure GDA0002286795790000207
for the high level tank B:
Figure GDA0002286795790000212
Figure GDA0002286795790000213
Wa/ithe calculation of (a) is the same as that of the high level tank a.
The following table shows the calculation of days W for a certain high level tank B in the embodiment1、
Figure GDA0002286795790000214
And Wa/iAs a result, the shaded area indicates that the area value is adopted.
Figure GDA0002286795790000215
Figure GDA0002286795790000221
The method for calculating the theoretical inlet flow and the corrected inlet flow A in the third step comprises the steps of completely calculating methods for the high-level water tank A and the high-level water tank B, wherein the total time of days is 24 hours, the balance is divided into 24 time periods, the time of each time period is 1 hour, the sequence number of different time periods in days is represented by i, and mod and W are respectively calculateda/i、Wb/iAnd
Figure GDA0002286795790000222
as before, then:
Figure GDA0002286795790000223
wherein V in the formulas (8) and (9)i 3/jThe calculated theoretical inlet flow of the high-level water tank in the time period i is used for calculating the theoretical outlet flow of the low-level water tank, and j represents the sequence number of the high-level water tank and has the unit of m3/h；Vi 2The corrected inlet flow A of the high level water tank in the time period i is used for calculating the specific time when a water pump supplying water to the high level water tank is closed, and the unit is m3/h；Wa/(i mod 24+1)The theoretical residual water quantity A of the high-level water tank at the beginning time of the (i +1) time period is obtained by calculation and has the unit of m3The expression (i +1) by (i mod24+1) is to satisfy the requirement that the period expression (i +1) cannot exceed the total number of periods 24.
The starting method of the water pump in the fourth step comprises the following step that when V is used at the starting time of days in different time periodsi 2When the water supply quantity is equal to 0, the intelligent controller sends a control signal instruction for not starting to supply water to the high-level water tank to the water pump, and when V is equal to 0i 2When the water supply amount is not equal to 0, the intelligent controller sends a control signal instruction for starting water supply to the high-level water tank to the water pump.
The method for calculating the specific time when the turned-on water pump needs to be turned off in the time period in the fourth step comprises the following steps of dividing the total time of days into 1440min, equally dividing the balance into 24 time periods, wherein the time of each time period is 60min, and representing the sequence number of different time periods in days by i, then:
for the water pump a:
Figure GDA0002286795790000231
for the water pump B:
Figure GDA0002286795790000232
wherein, t in the formula (10)iThe specific time point of the water pump needing to be shut down in the time period i is shown, the unit is min, and the rated flow of the water pump A is 12m3H, rated flow of the water pump B is 15m3/h。
The following table shows the theoretical inlet flows V of the high-level water tank A and the high-level water tank B calculated in the embodiment in different time periodsi 2And the specific time t at which the water pumps A and B need to be shut down at different time periodsi：
Figure GDA0002286795790000233
The calculation method of the theoretical outlet flow B in the fifth step comprises the following steps:
Vi d1＝Vi 3/1+Vi 3/2(11)
wherein, V in formula (11)i d1Representing theoretical outlet flow B, V of the low level water tank in the period ii 3/1Calculating the theoretical inlet flow V of the high-level water tank A in the time period ii 3/2Calculating the theoretical inlet flow of the high-level water tank B in the time period i; the calculation of the lower tank theoretical outlet flow B is shown in fig. 5.
The calculation method of the theoretical retained water amount B in the step five comprises the steps of enabling the total time of days to be 24 hours, evenly dividing a balance into 24 time periods, enabling the time of each time period to be 1 hour, representing the sequence number of different time periods in days by i, and enabling Vi d1As before, then:
w in formula (12)d1The lowest water retention quantity of the low-level water tank is represented in the unit of m3The parameter is set to ensure the most basic water requirement of the user, the minimum water quantity coefficient is set to be 0.07, and the calculation is carried out according to the theoretical outlet flow of the low-level water tankThe average value of the total water flowing out of the low level water tank for days is 275m3。
Wherein the value 3 is calculated by the following formula:
mi＝3/1＝3 (14)
in the formula (13)
Figure GDA0002286795790000243
Setting the given retention time of each time period to be 3h, wherein the given retention time refers to periods of artificially given time length for ensuring the water quality safety, the starting time of the period is the starting time of the time period i, the retained water in the starting time of the time period i completely flows out of the low-level water tank after the period, the given retention time is a key parameter for realizing quantitative calculation of the retained water, and the retained water is determined according to the given retention time, so that the tap water in the low-level water tank can be ensured to completely flow out of the low-level water tank within the normal variation range of the given retention time.
Figure GDA0002286795790000244
In the formula (15)
Figure GDA0002286795790000245
The theoretical residual water quantity B of the low-level water tank at the starting moment of the time period i under the condition that the given retention time is 3 hours is obtained through calculation, wherein the theoretical residual water quantity B is used for distinguishing the residual water quantity of the low-level water tank obtained through actual detection and specifically refers to the residual water quantity obtained through calculation; max { } is the operator for maximum value.
The following table shows the calculation of W for days for a certain low level tank in this embodimentd1、
Figure GDA0002286795790000246
And
Figure GDA0002286795790000247
as a result, the shaded area indicates that the area value is adopted.
Figure GDA0002286795790000251
The calculation method for correcting the inlet flow B in the fifth step is that the total time of days is 24h, the balance is divided into 24 time periods, the time of each time period is 1h, i represents the sequence number of different time periods in days, mod and V arei d1And
Figure GDA0002286795790000252
as before, then:
wherein, V in formula (16)i d2The corrected inlet flow B of the low-level water tank in the time period i is obtained through calculation;
Figure GDA0002286795790000254
representing the residual water quantity of the low-level water tank at the starting moment of the time period i, which is obtained by real-time detection;
Figure GDA0002286795790000255
for the calculated theoretical residual water amount B of the low level water tank at the beginning of the (i +1) time period, (i +1) is represented by (i mod24+1) in order to satisfy the requirement that the time period expression (i +1) cannot exceed the total number of time periods 24.
In the sixth step, the automatic valve is opened at the beginning of days in different time periodsi 2When the value is equal to 0, the intelligent controller sends a control signal instruction for not opening the water supply to the low-level water tank to the automatic valve , and when V isi 2When the value is not equal to 0, the intelligent controller sends a control signal instruction for opening the water supply to the low level water tank to the automatic valve .
The method for calculating the specific time when the opened automatic valve needs to be closed in the sixth step comprises the steps of 1440min for total days, dividing a balance into 24 time periods, wherein the time of each time period is 60min, and i represents the sequence number of different time periods in days, detecting the inlet flow rate entering the low-level water tank by a flowmeter after the automatic valve is opened, calculating the water supply amount of times in the time period by the intelligent controller every time pieces of inlet flow rate data are detected, comparing the calculated water supply amount with the theoretical water supply amount in the time period, and if the calculated water supply amount is larger than or equal to the theoretical water supply amount before the time period is ended, sending a control signal by the intelligent controller to instruct the automatic valve to stop supplying water, and stopping calculation and comparison at the end of the time period, then:
Figure GDA0002286795790000261
Wi d5＝60×Vi d2(18)
Figure GDA0002286795790000263
Figure GDA0002286795790000264
wherein, in formula (17)
Figure GDA0002286795790000265
Represents the amount of supplied water in m in the i period3，
Figure GDA0002286795790000266
The inlet flow of the low level water tank in the time period i obtained by real-time detection is shown, and the unit is m3R is the sequence number of the inlet flow data of the low-level water tank in the time period i obtained by real-time detection, h represents the total number of the inlet flow data of the low-level water tank in the time period i obtained by real-time detection, and the inlet flowmeter gives low-level water at intervals of 1minTank inlet flow data; w in formula (18)i d5Represents the theoretical water supply amount of the low level water tank in the i time period and has the unit of m3(ii) a Formula (20)Indicates the specific time at which the automatic valve needs to be closed during the i period, in units of min, h0Indicating th occurrence
Figure GDA0002286795790000268
The value of time h; mod and Vi d2The same meanings as above.
In this embodiment, when the water pump is in the off state, the rule that the intelligent controller control unit sends the "on" control signal instruction is: 1) for the high-level water tank corresponding to the water pump, at the starting moment of each time period, when the calculated V is equal to the Vi 2Greater than zero; 2) when receiving the control signal command of turning on the water pump sent from the external forced controller.
In this embodiment, when the water pump is in the open state, the rule that the intelligent controller control unit sends the command of the "close" control signal is as follows: 1) for the high-level water tank corresponding to the water pump, when the calculated t isiIf not, then at tiClosing the water pump at any time; 2) when receiving a control signal command of turning off the water pump sent from an external forced controller.
In this embodiment, the intelligent controller control unit issues an "on" control signal when the automatic valve is closed according to the rule that 1) at the beginning of each time period of the lower tank, the inlet flow V is corrected when the lower tank is calculatedi d2Greater than zero, 2) upon receiving a command from the external force controller to "open" the automatic valve .
In this embodiment, when the automatic valve is in the open state, the intelligent controller control unit will issue the "close" control signal command according to the rule of 1) if it is calculated before the end of a certain period of time for the low level tank
Figure GDA0002286795790000271
Then is at
Figure GDA0002286795790000272
Time to close the automatic valve , 2) upon receiving a command from the external force controller to "close" the automatic valve .
In this embodiment, for the high-level tank and the water pump thereof, the V calculated at each time period isi d2Are all larger than zero, therefore the control unit of the intelligent controller sends out a control signal instruction of turning on the corresponding water pump at the starting moment of each time period, and the calculated t isiAre not turned off, so when the water pump runs to tiAnd sending a control signal instruction for closing the corresponding water pump at the moment.
In this embodiment, the low level tank and its automatic valve are calculated from V at each time intervali d2All are larger than zero, so the intelligent controller control unit sends out a control signal instruction of opening the automatic valve at the beginning of each time period, and in the time period 13-14, because the water supply amount of the low level water tank is smaller than the theoretical water supply amount of the low level water tank at the end of the time period, the calculation cannot be carried out
Figure GDA0002286795790000273
I.e., automatic valve remains open for the entire period of time, and can be calculated before the end of other periods of time
Figure GDA0002286795790000274
Thus during these periods
Figure GDA0002286795790000275
At this time, the intelligent controller control unit issues a control signal command to "close" the automatic valve , the following table shows the theoretical water supply amount, the actual water supply amount for different periods of time of the lower water tank, and the specific time when the automatic valve is closed, "/" indicates that the automatic valve is not closed.
Figure GDA0002286795790000281

Claims (10)

  1. The water supply method of combined secondary water supply and storage equipment is characterized in that the combined secondary water supply and storage equipment comprises an low-level water tank and at least high-level water tanks, wherein the water inlet end of the low-level water tank is provided with an automatic valve , and the water inlet end of each high-level water tank is provided with a water pump;
    the water supply method comprises the following steps:
    , calculating theoretical outlet flow A of the high-level water tank in different time periods of days according to historical data of outlet flow in recent days;
    step two, calculating theoretical retained water quantity A of the high-level water tank at the starting time of different time periods of days under the condition of given retention time according to the obtained theoretical outlet flow A;
    calculating theoretical inlet flow and corrected inlet flow A of the high-level water tank in days in different time periods according to the obtained theoretical outlet flow A and the theoretical residual water quantity A;
    step four, sending a control signal instruction whether to start water supply to the high-level water tank to the water pump according to the corrected inlet flow A at the starting time of days in different time periods, if the water supply needs to be started, calculating the specific time when the started water pump needs to be closed in the time period, closing the water pump to stop water supply according to the calculation result, completing the water supply of the high-level water tank in the time period, and completing the water supply of the high-level water tank for days in a circulating manner;
    calculating theoretical outlet flow B of the low-level water tank according to theoretical inlet flow of the high-level water tank, calculating theoretical residual water quantity B of the low-level water tank at the starting time of days in different time periods under the condition of given retention time according to the theoretical outlet flow B, obtaining the residual water quantity B of the low-level water tank according to the obtained theoretical outlet flow B and the theoretical residual water quantity B by combining real-time detection, and calculating corrected inlet flow B of the low-level water tank in days in different time periods;
    step six, sending a control signal instruction whether to open the water supply to the low-level water tank to the automatic valve according to the corrected inlet flow B at the starting time of days in different time periods, if the water supply needs to be opened, calculating the specific time when the opened automatic valve needs to be closed in the time period, closing the automatic valve to stop the water supply according to the calculation result, completing the water supply of the low-level water tank in the time period, and completing the water supply of the low-level water tank days in a circulating manner.
  2. 2. The method of claim 1, wherein the corrected inlet flow A of the headbox in step three during different time periods of days is calculated from the theoretical outlet flow A and the theoretical residual water quantity A by real-time detection.
  3. 3. The method of claim 2, wherein the theoretical outlet flow A of step is calculated by dividing a balance equally into N time periods, using i to represent the sequence number of different time periods in days, and using the outlet flow of the high-level tank measured over the last consecutive E days to calculate:
    Figure FDA0002286795780000021
    wherein, in the formula (1)
    Figure FDA0002286795780000023
    Showing the outlet flow of the high level water tank obtained by detection, d showing the sequence number of continuous dates, d/i showing the time period i with the date of d, which is called d/i time period for short, c showing the sequence number of the outlet flow of the high level water tank measured in the d/i time period, Ad/iRepresenting the total number of head tank outlet flows measured during the d/i time period,
    Figure FDA0002286795780000024
    the arithmetic mean value of all the detected outlet flows of the high-level water tank in the d/i time period is represented; in the formula (2)
    Figure FDA0002286795780000025
    The theoretical outlet flow A of the i time period is calculated for all the I time periods on the continuous E days
    Figure FDA0002286795780000026
    Is calculated as the average of the counts.
  4. 4. The method of claim 3, wherein the theoretical amount A of water left in step two is calculated by dividing a balance into N time segments, where M is the total time of days, M/N is the time of each time segment, and i is the sequence number of days, then:
    Figure FDA0002286795780000029
    m in formula (5)iCalculated by the formula (6) below:
    Figure FDA00022867957800000210
    Figure FDA00022867957800000211
    wherein, W in the formula (3)1Indicating minimum water retention of high level water tankVolume, β is the set minimum water volume factor,
    Figure FDA00022867957800000212
    the average value of the total water flowing out of the high-level water tank for days is calculated according to historical data;
    in the formula (4)
    Figure FDA00022867957800000213
    Representing n consecutive from the time period iiThe sum of the maximum values of the water flows out of the high-level water tank in each time period; mod is the remainder operator; ((i + a-2) mod N +1) represents a period (i + a-1) in such a manner as to satisfy the requirement that the period expression (i + a-1) cannot exceed the total number N of periods;
    Figure FDA0002286795780000031
    indicates that all of the components in the same time period (i + a-1)Maximum value of (1);
    in the formula (5)
    Figure FDA0002286795780000033
    Representing m successive from time period iiThe sum of theoretical outflow water of the high-level water tank in each time period;
    t in formula (6)iRepresents a given dwell time at the start of the i period;
    w in formula (7)a/iAnd the theoretical residual water quantity A of the high-level water tank at the starting moment of the time period i under the condition of the given retention time is obtained through calculation, and max { } is an operator for solving the maximum value.
  5. 5. The combined secondary water supply and storage device of claim 4, wherein the theoretical inlet flow and the corrected inlet flow A in step three are calculated by the following steps:
    Figure FDA0002286795780000034
    Figure FDA0002286795780000035
    wherein in the formulas (8) and (9), Vi 3/jThe calculated theoretical inlet flow of the high-level water tank in the time period i is used for calculating the theoretical outlet flow of the low-level water tank, and j represents the sequence number of the high-level water tank; vi 2Indicating the corrected inlet flow A, W of the high-level cistern during time period ib/iRepresenting the amount of water remaining in the head tank at the start of the i period detected in real time by multiplying water level data obtained by real-time detection by a water level meter installed in the head tank by a conversion coefficient of data collected per minute, and Wa/(i mod N+1)For the calculated theoretical retained water amount a of the head tank at the beginning of the (i +1) time period, (i +1) is represented by (imod N +1) in order to satisfy the requirement that the time period expression (i +1) cannot exceed the total number N of time periods.
  6. 6. The method for supplying water to a combined secondary water supply and storage facility as claimed in claim 5, wherein the step four includes a method for turning on the water pump and a method for calculating the specific time when the turned-on water pump needs to be turned off in the time interval, which are respectively:
    the starting method of the water pump comprises the following steps that at the starting time of days in different time periods, when V is equal to Vi 2When the water level is equal to 0, a control signal instruction for not starting water supply to the high-level water tank is sent to the water pump, and when V isi 2When the water supply quantity is not equal to 0, a control signal instruction for starting water supply to the high-level water tank is sent to the water pump;
    the method for calculating the specific time when the started water pump needs to be closed in the time period comprises the following steps:
    Figure FDA0002286795780000041
    wherein, t in the formula (10)iIndicating the specific moment that the water pump needs to be shut down during the period i, and R indicating the rated flow of the water pump.
  7. 7. The combined secondary water supply and storage equipment water supply method according to claim 5, wherein the theoretical outlet flow B in the fifth step is calculated by:
    Figure FDA0002286795780000042
    wherein, V in formula (11)i d1And the theoretical outlet flow B of the low-level water tank in the time period i is shown, and the g represents the total number of the high-level water tanks.
  8. 8. The method for supplying water to combined secondary water supply and storage equipment as claimed in claim 7, wherein the theoretical residual water amount B in step five is calculated by:
    Figure FDA0002286795780000043
    Figure FDA0002286795780000044
    m in formula (13)iCalculated from the formula (14) below:
    Figure FDA0002286795780000045
    Figure FDA0002286795780000046
    wherein, W in formula (12)d1The lowest retained water quantity of the low-level water tank is represented, delta is a set lowest water quantity coefficient,the average value of the total water flowing out of the low-level water tank for days is calculated according to the theoretical outlet flow of the low-level water tank;
    in the formula (13)
    Figure FDA0002286795780000048
    Representing m successive from time period iiThe sum of theoretical outflow water of the low-level water tank in each time period;
    in formula (14)
    Figure FDA00022867957800000411
    Represents a given dwell time at the start of the i period;
    in the formula (15)
    Figure FDA00022867957800000410
    And the theoretical residual water quantity B of the low-level water tank at the starting moment of the time period i under the condition of the given retention time is obtained through calculation, and max { } is an operator for solving the maximum value.
  9. 9. The combined secondary water supply and storage device of claim 8, wherein the calculation method for correcting the inlet flow B in step five is:
    Figure FDA0002286795780000051
    wherein, V in formula (16)i d2The corrected inlet flow B of the low-level water tank in the time period i is obtained through calculation;
    Figure FDA0002286795780000052
    representing the amount of water remaining in the lower tank at the beginning of the i period detected in real time by multiplying water level data obtained by real-time detection using a water level gauge installed in the lower tank by a conversion coefficient of data collected per minute for converting the water level data into the amount of water remainingThe coefficient of the data;the theoretical water retention amount B of the low water tank at the starting time of the (i +1) time period is obtained by calculation, and the (i +1) is represented by (i mod N +1) so as to meet the requirement that the time period expression (i +1) cannot exceed the total number N of the time periods.
  10. 10. The method of claim 9, wherein the sixth step includes the method of opening the automatic valve and the method of calculating the specific time when the opened automatic valve needs to be closed during the time period, which are respectively:
    the automatic valve is opened at the beginning of days in different time periodsi 2When the value is equal to 0, a control signal command for not opening the water supply to the lower tank is sent to the automatic valve , and when V is seti 2When the water supply amount is not equal to 0, a control signal instruction for opening the water supply to the low-level water tank is sent to the automatic valve ;
    the method for calculating the specific time when the opened automatic valve needs to be closed in the time period comprises the steps of detecting the inlet flow rate entering the low level water tank by a flow meter after the automatic valve is opened, calculating the supplied water amount in the time period times every inlet flow rate data are detected, comparing the calculated supplied water amount with the theoretical supplied water amount in the time period, sending a control signal to instruct the automatic valve to close to stop supplying water if the calculated supplied water amount is more than or equal to the theoretical supplied water amount before the time period is ended, and stopping calculation and comparison when the time period is ended:
    Figure FDA0002286795780000054
    Figure FDA0002286795780000055
    Figure FDA0002286795780000061
    Figure FDA0002286795780000062
    wherein, in formula (17)
    Figure FDA0002286795780000063
    Indicating the supplied water amount of the lower tank during the i period,the flow meter is characterized by representing the inlet flow of a low-level water tank in the time period i obtained through real-time detection, r is the sequence number of inlet flow data of the low-level water tank in the time period i obtained through real-time detection, h represents the total number of the inlet flow data of the low-level water tank in the time period i obtained through real-time detection, and t represents inlet flow data of the low-level water tank given by the flow meter at intervals of t time;
    w in formula (18)i d5Representing the theoretical water supply amount of the low level water tank in the period i;
    in the formula (20)
    Figure FDA0002286795780000065
    Indicating the specific time at which the automatic valve needs to be closed during time i, h0Indicating th occurrence
    Figure FDA0002286795780000066
    The value of time h.
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