Intelligent energy-saving pressure regulating system and method for water supply pump group

Abstract

The present invention relates to the technical field of secondary energy-saving water supply, and specifically to an intelligent energy-saving pressure regulating system and method for a water supply pump group, wherein the steps of the method include: collecting the water pressure value of the water supply end and the water pressure values ​​of all water-using ends on each floor, and storing the collected data in a database; judging whether the current water-using period is at a peak according to the collected water pressure value, and if so, calculating and outputting the pressure compensation value, and performing a pressurization operation; otherwise, judging whether the water-using end on the floor requiring water supply has a large flow demand, and if so, the water supply of the water-using end is coordinated by the pressurized water tank on the floor where the water-using end is located and the pressurized water tanks on multiple floors above and below the water-using end; otherwise, the pressurized water tank on the floor where the water-using end is located supplies water independently. The present invention can effectively solve the problem of large energy waste in the existing secondary pressurized water supply system.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary energy-saving water supply, and in particular to an intelligent energy-saving pressure regulating system and method for a water supply pump group. Background Art

[0002] With the rapid development of urbanization in my country, the scale of cities is getting bigger and bigger, and there are more and more residential areas and high-rise buildings. The water supply network is getting bigger and bigger, resulting in insufficient water pressure in some parts of the water supply network, especially during the peak water consumption period, and water cannot be directly delivered to high-rise buildings. Therefore, the secondary pressurized water supply system is an indispensable part of the urban water supply network. High-rise buildings use the water tank + variable frequency water supply secondary pressurization mode. The control mode adopts the water outlet pressure and variable frequency to form a closed-loop control. When the water consumption increases, the network pressure decreases, the frequency converter frequency increases, and the water pump power increases; when the water consumption decreases, the network pressure increases, the frequency converter frequency decreases, and the water pump power decreases. In this way, the frequency converter is adjusted around a set water outlet pressure value, and the classic PID algorithm is generally used for adjustment.

[0003] In the actual application of the prior art, in order to take into account the pressure of peak and low water consumption, the outlet pressure is generally set too high, which causes energy waste during the low water consumption period. In particular, when high-rise users use water, in order to ensure the water pressure at the most unfavorable point, the outlet pressure is further set too high, resulting in a high pressure during the low water consumption period, resulting in a large waste of energy. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an intelligent energy-saving pressure regulating system and method for a water supply pump group, which can effectively solve the problem of large energy waste in the existing secondary pressurized water supply system.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] On one hand, the present invention provides an intelligent energy-saving pressure regulation method for a water supply pump group, which is applied to a water supply network, and a pressurized water tank with controllable opening and closing is arranged on multiple floors of a building; the steps of the method include:

[0009] Collect the water pressure value of the water supply end and the water pressure value of all water consumption ends on each floor, and store the collected data in the database;

[0010] According to the collected water pressure value, determine whether it is the peak water usage period. If so, calculate and output the pressure compensation value and perform the pressurization operation; otherwise,

[0011] Determine whether the user end on the floor that needs water supply has a large flow demand. If so, the water supply to the user end is coordinated by the pressurized water tank on the floor where the user is located and the pressurized water tanks on multiple floors above and below it; otherwise, the pressurized water tank on the floor where the user end is located will supply water independently.

[0012] Another aspect of the present invention provides an intelligent energy-saving pressure regulating system for a water supply pump group, which is used to execute the energy-saving pressure regulating method mentioned above. The pressure regulating system includes the pressurized water tanks arranged on multiple floors, and also includes:

[0013] A water pump, which is arranged at one side of the water supply end, pressurizes water through the main water pipeline and transports it to the branch water pipelines on each floor, the branch water pipelines are connected to the water use end, wherein the pressurized water tank is arranged on the branch water pipeline;

[0014] A solenoid valve is arranged on the branch water pipeline and between the pressurized water tank and the main water pipeline, and is used to control the connection and disconnection between the branch water pipeline and the main water pipeline;

[0015] A collection module is used to collect the water pressure value of the water supply end and the water pressure value of the water use end on each floor;

[0016] The control module is used to process and calculate the data obtained by the acquisition module, determine whether it is the peak water usage period and the water flow demand of the corresponding water use end, and output the control of the pressurized water tank, water pump and solenoid valve respectively.

[0017] Furthermore, the steps of calculating and outputting the pressure compensation value are as follows:

[0018] Establishing a prediction model through the historical data of the water pressure value collected in the database;

[0019] Apply the prediction model to output prediction information of water pressure value at the water supply end and water pressure value at the water use end of the highest floor;

[0020] Determine whether the real-time water pressure value at the water supply end and the change trend of the water pressure value at the water use end on the highest floor are abnormal. If so, obtain the pressure compensation value through inspection calculation; otherwise, retrieve the pressure compensation value corresponding to the similar water pressure value in the historical data.

[0021] Furthermore, the steps of calculating the compensation value through the inspection are:

[0022] Find the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor that are closest to the real-time data in the database;

[0023] The water pressure value of the closest water supply end is mapped to the first pressure compensation value, and the water pressure value of the closest water use end on the highest floor is mapped to the second pressure compensation value;

[0024] Selecting the smaller value of the first pressure compensation value and the second pressure compensation value to pressurize the water supply network once;

[0025] The difference between the larger value and the smaller value of the first pressure compensation value and the second pressure compensation value is selected to perform secondary pressurization on the water supply network.

[0026] Furthermore, when it is determined that the water-using end has a large flow demand, the pressurized water tank on the floor of the water-using end, the pressurized water tank on the 3rd floor immediately above it, and the pressurized water tank on the 1st floor immediately below it are selected to jointly cooperate in water supply.

[0027] Furthermore, it also includes a flow meter, which is arranged at the water supply end and is used to collect the actual flow value of the water supply end. The control module obtains the actual flow value to determine whether it is currently a water consumption peak period.

[0028] Furthermore, the acquisition module includes a pressure sensor, a data acquisition terminal and a wireless communication module. The pressure sensors are respectively arranged on the pipelines at the water supply end and multiple water use ends to collect water pressure value data at the location in real time. The data acquisition terminal can be connected to multiple pressure sensors at the same time, and send the processed water pressure value data to the control module via the wireless communication module.

[0029] Furthermore, the control module includes a database for storing and processing the water pressure value data sent from the acquisition module; a processing unit for data processing and calculation; and a mathematical model unit for establishing the prediction model;

[0030] And a patrol calculation unit, which is used to calculate the pressure compensation value in combination with database patrol when the change trends of the water pressure value at the water supply end and the water pressure value at the water use end of the highest floor are abnormal.

[0031] Further, the inspection calculation unit includes traversing the inspection area, inputting real-time data, including the water pressure value at the water supply end and the water pressure value at the water use end of the highest floor, traversing the entire database, and finding the closest water pressure value at the water supply end and the water pressure value at the water use end of the highest floor;

[0032] A data mapping area maps the water pressure value of the closest water supply end to the first pressure compensation value, and maps the water pressure value of the closest highest floor water use end to the second pressure compensation value;

[0033] In the data comparison area, if the change range of the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor exceeds the preset range, first select the smaller value of the first pressure compensation value and the second pressure compensation value as the pressure compensation value, and control the water pump to perform a primary pressurization, and then select the difference between the larger value and the smaller value of the first pressure compensation value and the second pressure compensation value as the pressure compensation value, and control the water pump to perform a secondary pressurization.

[0034] Furthermore, the control module further includes a judgment and comparison unit, which is used to compare the actual flow values ​​of the water supply end to judge whether the current water consumption period is a peak period;

[0035] Compare the water pressure value of a single water-using end with the preset first threshold and second threshold to determine the flow demand of the water-using end;

[0036] Compare the range of the real-time data and predicted information change interval with the preset range to determine whether the change trend of the real-time water pressure value at the water supply end and the water pressure value at the water use end on the highest floor is abnormal.

[0037] Beneficial Effects

[0038] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0039] The present invention adopts a pressure maintaining system design consisting of controllable pressurized water tanks and solenoid valves arranged on multiple floors, and cooperates with a multi-level comparison and judgment mechanism. During the peak water use period, the optimal pressure compensation value is generated after the prediction and judgment of the control module according to the water pressure value at the water supply end and the water pressure value at the water use end of the highest floor, thereby saving energy consumption and reducing emissions. During the low water use period, water is supplied through the pressure maintaining system. Since the low water use period is relatively long, on the one hand, the problem of repeated starting and stopping of the water pump is reduced, and on the other hand, the problem of energy waste caused by setting the water outlet pressure value too large during the low water use period is reduced while ensuring that users have sufficient water. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a schematic diagram of an application scenario of the energy-saving voltage regulation system of this embodiment;

[0042] Figure 2 It is a schematic flow chart of the secondary pressurized water supply method of this embodiment;

[0043] The numbers in the figure represent: 1. Water pump; 2. Pressurized water tank; 3. Solenoid valve; 4. Main water pipeline; 5. Branch water pipeline; 6. Collection module; 7. Control module. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The present invention will be further described below in conjunction with the embodiments.

[0046] Example:

[0047] The present invention provides an intelligent energy-saving pressure-regulating system and method for a water supply pump group. The energy-saving pressure-regulating system and method are applied to the secondary water supply network of high-rise buildings. By arranging pressurized water tanks 2 with controllable opening and closing on multiple floors of the high-rise buildings, this example is preferentially designed to be provided with pressurized water tanks 2 on all floors that require secondary pressurized water supply. The main body of the pressurized water tank 2 in this embodiment is a diaphragm pressure tank with a certain volume. When the water pump starts to supply water to the network, excess water is stored in the pressurized water tank, and a certain volume of pressurized water can be stored in the pressurized water tank through air compression.

[0048] Reference Figure 1-2 , showing the establishment of the pipe network between the water supply end and the water consumption end. In this example, for the convenience of explanation, a corresponding most unfavorable point is set on the highest floor of the high-rise building, and the water pressure value of the water consumption end of the highest floor is set to P1, and the water pressure values ​​of the floors from high to low are successively Pn, wherein the water pressure value of the water supply end is set to P0. Specifically, the steps of the energy-saving pressure regulation method include:

[0049] S10, collecting the water pressure value P0 of the water supply end and the water pressure values ​​P1-Pn of all water consumption ends on each floor, and storing the collected data in a database;

[0050] S20, judging whether it is the peak water usage period according to the collected water pressure value, if so, calculating and outputting the pressure compensation value, and performing the pressurization operation, otherwise, executing step S30;

[0051] S30, determine whether the water user on the floor that needs water supply has a large flow demand. If so, the water supply to the water user is coordinated by the pressurized water tank 2 on the floor where the water user is located and the pressurized water tanks 2 on multiple floors above and below it; otherwise, the pressurized water tank 2 on the floor where the water user is located supplies water independently.

[0052] Specifically, when judging whether the water-using end has a large flow demand, the flow demand of the water-using end is judged by comparing the water pressure value of a single water-using end with the preset first threshold and second threshold. In addition, in this embodiment, preferably, when judging that the water-using end has a large flow demand, the pressurized water tank 2 on the floor of the water-using end, the pressurized water tank 2 on the 3rd floor immediately above it, and the pressurized water tank 2 on the 1st floor immediately below it are selected to cooperate in water supply.

[0053] For example, when the water pressure value at the water-using end of floor n is lower than the first threshold, the water-using end of floor n has a small flow demand, and the control module 7 controls the solenoid valve 3 of the pressure-maintaining system of floor n to be closed, and the water-using end of floor n is supplied with water by the pressurized water tank 2 of floor n; when the water-using end uses water, the compressed gas in the pressurized water tank 2 presses the water inside it into the pipe network to ensure the small flow water demand of the water-using end of floor n. Of course, at this time, the pressure of the pressurized water tank 2 of floor n also decreases, and of course, the detection data of the pressure sensor detecting the water-using end of floor n will also decrease. When the detected water pressure value continues to decrease and is lower than the set second threshold, the water demand of floor n is converted from a small flow demand to a large flow demand. Continue the control as follows:

[0054] When the water pressure value at the water end of floor n is lower than the second threshold value and greater than the first threshold value, the water end of floor n has a large flow demand, and the control module 7 controls the solenoid valve 3 of floor n and the coordinated water supply floor of floor n to open. Specifically, the coordinated water supply floor range of floor n includes all floors from floor n-1 to floor n+3. The coordinated water supply of multiple floors ensures that the floor still has sufficient water when there is a large flow demand. Minimize the problem of secondary pressurization and repeated start and stop of water pump 1, and more intuitively reduce the problem of setting a large water outlet pressure value during low water consumption period, save energy consumption to the maximum extent, and achieve energy saving effect.

[0055] Specifically, in the step of calculating and outputting the pressure compensation value, the core is to preliminarily determine the generation method of the pressure compensation value, select the most suitable generation method, and improve the accuracy of the pressure compensation value data. The specific steps are as follows:

[0056] S21, establishing a prediction model through historical data of water pressure values ​​collected in a database;

[0057] S22, using the prediction model to output prediction information of the water pressure value at the water supply end and the water pressure value at the highest floor water use end;

[0058] S23, determine whether the change trend of the real-time water pressure value at the water supply end and the water pressure value at the water use end on the highest floor is abnormal. If so, obtain the pressure compensation value through inspection calculation; otherwise, retrieve the pressure compensation value corresponding to the similar water pressure value in the historical data.

[0059] Specifically, if the difference between the predicted information and the actual collected value exceeds a preset threshold, or the change trend of the predicted value does not match the actual situation, such as a sudden increase or decrease; it may indicate that the change trend of the water pressure value is abnormal.

[0060] The historical data of water pressure values ​​collected in the database is determined by the timestamp corresponding to the collection time to determine whether it is historical data or real-time data. The database stores historical data and real-time data by classification; the database is connected to the classification database, and the database includes a retrieval library and an analysis library. The retrieval library can retrieve data from the classification database, and the analysis library can obtain the pressure compensation value within the historical period based on the historical data. The preprocessing unit removes impurities from the data in the historical database and the real-time database, and obtains historical data and real-time data with time information.

[0061] In addition, when obtaining the pressure compensation value through patrol calculation, the steps of patrol calculation of the compensation value are as follows:

[0062] S231, finding the water pressure value at the water supply end and the water pressure value at the water supply end on the highest floor that are closest to the real-time data in the database;

[0063] Among them, real-time data refers to the water pressure value of the water supply end and the water pressure value of the highest floor water use end collected in real time. The timestamp corresponding to the collection time determines whether it is historical data or real-time data. The database finds the closest water pressure value of the water supply end and the water pressure value of the highest floor water use end by traversing and comparing the historical data in the entire database.

[0064] The water pressure value that is closest to the real-time data can more truly reflect the current state of the water supply system, thereby ensuring that the calculated pressure compensation value is more accurate. Avoid deviations between the calculated pressure compensation value and the actual demand, which in turn affects the stability and efficiency of the water supply system. In addition, the water pressure of the water supply system changes dynamically, especially during peak hours or emergencies, the fluctuation of water pressure may be more significant. Therefore, using the water pressure value that is closest to the real-time data for calculation can reflect the actual situation of the system more promptly and provide a more reliable basis for pressure compensation.

[0065] In one example, real-time data may fluctuate or become abnormal due to various factors, such as sensor failure, data transmission error, etc. Using the closest value in the historical model can be used as a means of data smoothing to reduce the impact of data fluctuations on the mapping results. For example, the real-time data of the water pressure value at the water end of the highest floor is 10Kpa, while the highest historical data is only 7Kpa. At this time, step S231 can prevent the fluctuation of real-time data from causing an error in determining the pressure compensation value.

[0066] Furthermore, in order to prevent the real-time data generated by fluctuations from being entered into the database, when the database records data, only the real-time data whose difference with the maximum historical data is within a preset range is entered into the database.

[0067] Exemplarily, the preset range is [0, 10%*maximum historical data].

[0068] However, the above measures may make the maximum value of the water pressure value fixed. For example, the user does have real water demand in a certain period of time, but the difference between the real-time data and the maximum historical data in this period is always greater than the preset range, which leads to the view that the data is fluctuating and is not trusted. Therefore, when the real-time data is greater than the maximum historical data, and the difference between the real-time data and the maximum historical data is not within the preset range, the maximum historical data can be multiplied by a preset ratio to obtain the corrected historical data, and the corrected historical data is determined as the closest historical data in the database, and the corrected historical data is recorded in the database to prevent the value of the maximum historical data in the database from being fixed, so as to realize the intelligent update of data. For example, the real-time data of the water pressure value at the water end of the highest floor is 10Kpa, while the highest historical data is only 7Kpa. 7Kpa*1.5%=7.35Kpa, and 7.35Kpa is determined as the closest historical data in the database.

[0069] However, although the preset ratio is only 0.05, it can prevent the maximum historical data from shifting to a certain extent. However, the service life of water pipes is very long. Continuous data fluctuations over several years or even decades will also cause the maximum historical data to continuously exceed the upper limit. Therefore, the data is divided into ordinary data and revised historical data in the database. The revised historical data must be converted into ordinary data after at least one real-time data is greater than or equal to the revised historical data within a certain time range. Otherwise, the revised historical data will be removed from the database to prevent data fluctuations from causing the maximum historical data to continue to increase, thereby losing the function of preventing data fluctuations in the future.

[0070] Optionally, the certain time range is 7 days.

[0071] Optionally, after the real-time data is greater than or equal to the revised historical data at least twice within 7 days, the revised historical data is converted into ordinary data.

[0072] S232, mapping the water pressure value of the closest water supply end to a first pressure compensation value, and mapping the water pressure value of the closest water use end on the highest floor to a second pressure compensation value;

[0073] In order to more clearly illustrate how to map the water pressure value of the closest water supply end and the water pressure value of the water use end on the highest floor to the corresponding pressure compensation value, this embodiment provides two specific mapping relationship tables, Table 1 and Table 2, and gives an example for each:

[0074] As shown in Table 1 below, it is used to map the water pressure value at the water supply end to the first pressure compensation value.

[0075] Table 1

[0076]

[0077] Referring to Table 1 above, for example, if the real-time data of the water pressure value at the water supply end is 52 kPa, according to the mapping table, 52 kPa falls within the range of 41 - 60 kPa, so the corresponding first pressure compensation value is 10 kPa.

[0078] Similarly, we can set a mapping table for the water pressure value at the water end of the highest floor, such as Table 2, to map to the second pressure compensation value:

[0079] Table 2

[0080]

[0081] Referring to Table 2 above, if the real-time measured water pressure value at the highest floor water end is 25 kPa, according to the mapping table, 25 kPa falls within the range of 21 - 30 kPa, so the corresponding second pressure compensation value is 0 kPa (no compensation required).

[0082] In actual applications, when the water supply system detects abnormal water pressure at the water supply end or the water use end on the highest floor, the corresponding pressure compensation value can be calculated according to the above mapping relationship, and the pressure can be adjusted by adjusting water pumps, valves and other equipment.

[0083] S233, selecting the smaller value of the first pressure compensation value and the second pressure compensation value to perform a pressurization;

[0084] S234, selecting the difference between the larger value and the smaller value of the first pressure compensation value and the second pressure compensation value for secondary pressurization.

[0085] The pressure regulation method has a multi-level comparison and judgment mechanism. During the peak water usage period, the optimal pressure compensation value is generated after the prediction and judgment of the control module 7 according to the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor, thereby saving energy consumption and reducing emissions. During the low water usage period, water is supplied through the pressure maintaining system. Since the low water usage period is relatively long, on the one hand, the problem of repeated starting and stopping of the water pump 1 is reduced. On the other hand, the problem of energy waste caused by setting the water outlet pressure value too high during the low water usage period is reduced while ensuring that users have sufficient water.

[0086] With respect to the above-mentioned intelligent energy-saving pressure regulation method, the energy-saving pressure regulation system includes a water tank, a water pump 1 and the above-mentioned multiple pressurized water tanks 2. The water pump 1 is arranged at one side of the water supply end, and pressurizes water through the main water pipeline 4 of the pipe network and transports it to the branch water pipeline 5 of each floor. The branch water pipeline 5 is connected to the water use end, wherein the pressurized water tank 2 is arranged on the branch water pipeline 5;

[0087] And the solenoid valve 3 is arranged on the branch water pipeline 5 and between the pressurized water tank 2 and the main water pipeline 4, and is used to control the connection and disconnection between the branch water pipeline 5 and the main water pipeline 4; when the solenoid valve 3 is in the open state, the various branch water pipelines 5 are connected together through the main water pipeline 4.

[0088] And the collection module 6 is used to collect the water pressure value of the water supply end and the water pressure value of the water use end of each floor, for example Figure 1 In the figure, the water pressure value at the water supply end is P0;

[0089] The control module 7 is used to process and calculate the data obtained by the collection module 6, determine whether it is the peak water usage period and the water flow demand of the corresponding water use end, and output the control of the pressurized water tank 2, water pump 1 and solenoid valve 3 respectively.

[0090] In order to obtain the flow value at the water supply end, the system also includes a flow meter, which is connected to the water supply end and is used to collect the actual flow value at the water supply end. The control module 7 obtains the actual flow value to determine whether it is currently a water consumption peak period.

[0091] Specifically, in the collection of water pressure values ​​at multiple points implemented by the system, the main body adopts a distributed collection architecture. The collection module 6 includes a pressure sensor, a data collection terminal and a wireless communication module. The pressure sensors are respectively arranged on the pipelines at the water supply end and multiple water use ends to collect the water pressure value data at the location in real time. The data collection terminal has multi-channel data collection capabilities, can connect multiple pressure sensors at the same time, and send the processed water pressure value data to the control module 7 via the wireless communication module.

[0092] Among them, the control module 7 includes multiple subsystem units, which are used to cooperate with external hardware to execute the pressure regulation method. Specifically, the control module 7 includes a database for storing and processing the water pressure value data sent from the acquisition module 6; a processing unit for data processing and calculation; wherein the processing unit classifies the collected water pressure values ​​at the water supply end and the water pressure values ​​at the water use end on the highest floor, obtains historical data and real-time data, and pre-processes the historical data and real-time data.

[0093] The control module 7 also includes a judgment and comparison unit, which is used to compare the actual flow value of the water supply end and determine whether the current water consumption period is peak. The actual flow value is obtained in real time by the flow meter and compared with the built-in preset threshold to determine whether the water consumption period has reached the peak.

[0094] And a mathematical model unit for establishing a prediction model, historical data and the time when the prediction model is generated are used to create a prediction model, and the prediction information of the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor is output. The above prediction information is used to determine whether there is any abnormality in the changing trend of the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor.

[0095] The comparison unit is also used to compare the water pressure value of a single water-using end with the preset first threshold and second threshold to determine the flow demand of the water-using end; based on the water pressure value Pn of the water-using end on the nth floor, determine whether the water-using end on the nth floor has a large flow demand. If so, the water-using end on the nth floor is supplied with water by the pressurized water tank 2 on the nth floor and the pressurized water tank 2 on the collaborative water supply floor on the nth floor; if not, the water-using end on the nth floor is supplied with water by the pressurized water tank 2 on the nth floor.

[0096] The comparison unit is also used to compare the range of the real-time data and predicted information change interval with the preset range, and to determine whether the change trend of the real-time water pressure value at the water supply end and the water pressure value at the water use end on the highest floor is abnormal. The abnormalities here include sudden drops, excessive fluctuations, etc.

[0097] Of course, when it is determined that there is no abnormality in the changing trend of the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor, the control module 7 directly retrieves the corresponding pressure compensation value from the database in real time according to the real-time data as the data basis for system pressurization, ensuring the safety and efficiency of the pressurization operation.

[0098] However, if it is judged that there is an abnormality in the change trend of the water pressure value at the water supply end and the water pressure value at the highest floor water use end,

[0099] It is necessary to use the inspection calculation unit in the control module 7, which is used to calculate the pressure compensation value in combination with the database inspection when the change trend of the water pressure value at the water supply end and the water pressure value at the water use end of the highest floor is abnormal.

[0100] Specifically, the inspection calculation unit includes traversing the inspection area, inputting real-time data, including the water pressure value of the water supply end and the water pressure value of the water use end on the highest floor, traversing the entire database, and finding the most matching or closest water pressure value of the water supply end and the water pressure value of the water use end on the highest floor;

[0101] Data mapping area, mapping the water pressure value of the closest water supply end to the first pressure compensation value Pa, and mapping the water pressure value of the closest highest floor water use end to the second pressure compensation value Pb;

[0102] In the data comparison area, if the water pressure value at the water supply end and the water pressure value at the highest floor water use end change range exceeds the preset normal range, determine whether there is an abnormality:

[0103] First, select the smaller value Pb of the first pressure compensation value Pa and the second pressure compensation value as the pressure compensation value, and control the water pump 1 to pressurize the water supply network. This step is to quickly respond to the drop in water pressure and ensure that the water pressure at the water supply end and the highest floor is initially increased.

[0104] Then select the difference IPa-PbI between the larger and smaller values ​​of the first pressure compensation value and the second pressure compensation value as the pressure compensation value, and control the water pump 1 to perform secondary pressurization on the water supply network. This step is to further adjust the water pressure so that the water pressure at the water supply end and the highest floor can reach a relatively balanced state and meet the demand.

[0105] The system determines whether it is the peak water use period through the control module 7. If it is the peak water use period, the system calculates the output pressure compensation value through inspection and performs secondary pressurization to ensure that high-rise users have sufficient water. If it is the low water use period, the pressure maintenance system composed of the solenoid valve 3 and the pressurized water tank 2 in the branch water pipeline 5 can ensure that users have sufficient water regardless of small or large flow demand. Since the low water use period is long, on the one hand, the problem of repeated start and stop of the water pump 1 is reduced, and on the other hand, the problem of energy waste caused by the excessively large water outlet pressure value during the low water use period is reduced while ensuring that users have sufficient water. The problem of large capacity waste in the existing secondary pressurized water supply system is solved. This solution saves energy consumption to the maximum extent and achieves energy-saving effect. The energy-saving effect measured in the actual test is 10%-15% of the energy consumption of the pump room, and the energy-saving effect is obvious.

[0106] In the prior art, in order to take into account the pressure of both peak and low water consumption, the outlet pressure is generally set too high, which causes energy waste during the low water consumption period. In particular, when users in high-rise buildings use water, in order to ensure the water pressure at the most unfavorable point, the outlet pressure is further set too high, resulting in a relatively high pressure during the low water consumption period, causing a large waste of energy.

[0107] In this technical solution, if it is a peak water usage period, the water pump is pressurized for a second time by calculating the output pressure compensation value to ensure that high-rise users have sufficient water; if it is a low water usage period, water is supplied by a pressure maintaining device, i.e., a pressurized water tank. Since the low water usage period is longer, on the one hand, the problem of repeated start and stop of the water pump is reduced, and on the other hand, the problem of energy waste caused by setting a too high water outlet pressure value during the low water usage period is reduced while ensuring that users have sufficient water.

[0108] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent energy-saving pressure regulation method for a water supply pump group, characterized in that: The energy-saving pressure regulation method is applied to a water supply network, and pressure water tanks that can be controlled to open and close are arranged on multiple floors of a building; The steps of the method include: Collect the water pressure value of the water supply end and the water pressure value of all water consumption ends on each floor, and store the collected data in the database; According to the collected water pressure value, determine whether it is the peak water usage period. If so, calculate and output the pressure compensation value and perform the pressurization operation; otherwise, Determine whether the water user on the floor that needs water supply has a large flow demand. If so, the water supply to the water user is coordinated by the pressurized water tank on the floor where the water user is located and the pressurized water tanks on multiple floors above and below it; otherwise, the pressurized water tank on the floor where the water user is located supplies water independently; The steps for calculating and outputting the pressure compensation value are as follows: Establishing a prediction model through the historical data of the water pressure value collected in the database; Apply the prediction model to output prediction information of water pressure value at the water supply end and water pressure value at the water use end of the highest floor; Determine whether the change trend of the real-time water pressure value at the water supply end and the water pressure value at the water use end on the highest floor is abnormal. If so, obtain the pressure compensation value through inspection calculation; otherwise, retrieve the pressure compensation value corresponding to the similar water pressure value in the historical data; The steps of calculating the compensation value through the inspection are as follows: Find the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor that are closest to the real-time data in the database; The water pressure value of the closest water supply end is mapped to the first pressure compensation value, and the water pressure value of the closest water use end on the highest floor is mapped to the second pressure compensation value; Selecting the smaller value of the first pressure compensation value and the second pressure compensation value to pressurize the water supply network once; The difference between the larger value and the smaller value of the first pressure compensation value and the second pressure compensation value is selected to perform secondary pressurization on the water supply network.

2. The intelligent energy-saving pressure regulating method for a water supply pump group according to claim 1 is characterized in that: When it is determined that the water user has a large flow demand, the pressurized water tank on the floor of the water user, the pressurized water tank on the 3rd floor immediately above it, and the pressurized water tank on the 1st floor immediately below it are selected to jointly supply water.

3. An intelligent energy-saving pressure regulating system for a water supply pump group, characterized in that: For executing the method according to any one of claims 1 to 2, the pressure regulating system comprises the pressurized water tanks arranged on multiple floors, and further comprises: A water pump, the water pump is arranged at one side of the water supply end, pressurizes water through the main water pipeline of the pipe network and transports it to the branch water pipelines on each floor, the branch water pipelines are connected to the water use end, wherein the pressurized water tank is arranged on the branch water pipeline; A solenoid valve is arranged on the branch water pipeline and between the pressurized water tank and the main water pipeline, and is used to control the on-off between the branch water pipeline and the main water pipeline; A collection module is used to collect the water pressure value of the water supply end and the water pressure value of the water use end on each floor; The control module is used to process and calculate the data obtained by the acquisition module, determine whether it is the peak water usage period and the water flow demand of the corresponding water use end, and output the control of the pressurized water tank, water pump and solenoid valve respectively.

4. The intelligent energy-saving pressure regulating system for water supply pump group according to claim 3 is characterized in that: It also includes a flow meter, which is arranged at the water supply end and is used to collect the actual flow value of the water supply end. The control module obtains the actual flow value to determine whether it is currently a water consumption peak period.

5. The intelligent energy-saving pressure regulating system for water supply pump group according to claim 3 is characterized in that: The acquisition module includes a pressure sensor, a data acquisition terminal and a wireless communication module. The pressure sensors are respectively arranged on the pipelines at the water supply end and multiple water use ends to collect water pressure value data at the location in real time. The data acquisition terminal can be connected to multiple pressure sensors at the same time and send the processed water pressure value data to the control module via the wireless communication module.

6. The intelligent energy-saving pressure regulating system for water supply pump group according to claim 3 is characterized in that: The control module comprises: A database for storing and processing the water pressure value data sent from the acquisition module; Processing unit for data processing and calculation; A mathematical model unit used for establishing the prediction model; The inspection calculation unit is used to calculate the pressure compensation value in combination with the database inspection when the change trend of the water pressure value at the water supply end and the water pressure value at the water use end of the highest floor is abnormal.

7. The intelligent energy-saving pressure regulating system for water supply pump group according to claim 6 is characterized in that: The inspection calculation unit comprises: Traverse the inspection area, input real-time data, including the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor, traverse the entire database, and find the closest water pressure value at the water supply end and the water pressure value at the water use end on the highest floor; A data mapping area maps the water pressure value of the closest water supply end to the first pressure compensation value, and maps the water pressure value of the closest highest floor water use end to the second pressure compensation value; In the data comparison area, if the change range of the water pressure value at the water supply end and the water pressure value at the water use end on the highest floor exceeds the preset range, first select the smaller value of the first pressure compensation value and the second pressure compensation value as the pressure compensation value, and control the water pump to perform a primary pressurization, and then select the difference between the larger value and the smaller value of the first pressure compensation value and the second pressure compensation value as the pressure compensation value, and control the water pump to perform a secondary pressurization.

8. The intelligent energy-saving pressure regulating system for water supply pump group according to claim 3 is characterized in that: The control module also includes a judgment and comparison unit, which is used to compare the actual flow value of the water supply end to judge whether it is the peak water consumption period; Compare the water pressure value of a single water-using end with the preset first threshold and second threshold to determine the flow demand of the water-using end; Compare the range of the real-time data and predicted information change interval with the preset range to determine whether the change trend of the real-time water pressure value at the water supply end and the water pressure value at the water use end on the highest floor is abnormal.

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