Energy-saving pressure regulating system of water supply pump set

Abstract

The utility model relates to the technical field of secondary energy-saving water supply, in particular to an energy-saving pressure regulating system of a water supply pump set, a water supply pipe network comprises branch water pipelines distributed on each floor, a main water pipeline communicated with the branch water pipelines and a water pump, the water pump is arranged on one side of a water supply end and communicated with a water supply tank and the main water pipeline, and the main water pipeline is communicated with the branch water pipelines. Water is pressurized through the main water pipeline, conveyed to the branch water pipelines of all floors and then communicated with a water using end through the branch water pipelines; the pressurizing water tank is arranged on the plurality of branch water pipelines in a communicating manner; the electromagnetic valve is arranged on the branch water pipeline, is arranged between the pressurizing water tank and the main water pipeline, and is used for controlling the connection and disconnection between the branch water pipeline and the main water pipeline; the collecting module is used for collecting the water pressure value of the water supply end and the water pressure value of the water using end of each floor; the secondary pressurization water supply system can effectively solve the problem that an existing secondary pressurization water supply system is large in energy waste.

Description

TECHNICAL FIELD

[0001] The utility model relates to secondary energy -saving water supply technical field, concretely relates to a kind of energy -conserving pressure regulating system of water supply pump set. BACKGROUND

[0002] With the rapid development of urbanization of our country, city scale is increasingly larger, community and high-rise building are increasingly more, water supply pipe network is increasingly larger, leading to local water pressure of water supply pipe network is not enough, especially during water peak, water cannot be directly sent to high-rise, therefore, secondary pressurized water supply system is indispensable component in city water supply pipe network.High-rise building adopts water tank+frequency conversion water supply secondary pressurization mode, control mode adopts outlet pressure and frequency conversion to form closed loop control, when water consumption increases, pipe network pressure drops, frequency converter frequency increases, water pump power increases;When water consumption decreases, pipe network pressure rises, frequency converter frequency reduces, water pump power reduces, so that frequency converter adjusts around a set outlet pressure value, generally adopts classic PID algorithm adjustment.

[0003] In actual application, prior art generally sets outlet pressure too large in order to consider water peak and low peak pressure, which causes energy waste during water low peak period.Especially when high-rise user uses water, in order to ensure the most unfavorable point water pressure, outlet pressure is further set too large, which causes water low peak period to also maintain higher pressure, causing greater energy waste. INVENTION CONTENTS

[0004] TECHNICAL PROBLEM SOLVED

[0005] In view of the above shortcomings of prior art, the utility model provides a kind of energy -conserving pressure regulating system of water supply pump set, can effectively solve the problem of greater energy waste of existing secondary pressurized water supply system.

[0006] TECHNICAL SCHEME

[0007] To achieve the above object, the utility model is realized by the following technical scheme:

[0008] The utility model provides a kind of energy -conserving pressure regulating system of water supply pump set, the energy -conserving pressure regulating system is applied in water supply pipe network, and water supply pipe network includes the branch water pipe line distributed in each floor, and the main water pipe line that is connected to multiple branch water pipe lines, further includes water pump, the water pump is set in water supply end side, is connected to water supply water tank and the main water pipe line, and through main water pipe line, water is pressurized, transported to each floor branch water pipe line, and then through branch water pipe line, water end is connected;

[0009] And pressurized water tank, it is connected to be arranged in multiple branch water pipe lines;

[0010] And a solenoid valve, which is installed on the branch water pipeline and between the pressurized water tank and the main water pipeline, for controlling the on / off connection between the branch water pipeline and the main water pipeline;

[0011] And a data acquisition module, used to collect the water pressure value at the water supply end and the water pressure value at the water consumption end on each floor;

[0012] It also includes a controller electrically connected to the acquisition module. The controller outputs control to operate the pressurized water tank, water pump and solenoid valve respectively based on the water pressure value at the water supply end and the water pressure value at the water consumption end collected in real time by the acquisition module.

[0013] Furthermore, the acquisition module includes a pressure sensor, a data acquisition terminal, and a wireless communication module. The pressure sensor is respectively installed on the pipeline at the water supply end and multiple water-using ends to collect water pressure data at the location in real time. The data acquisition terminal can connect to multiple pressure sensors simultaneously and send the processed water pressure data to the controller via the wireless communication module.

[0014] Furthermore, the acquisition module also includes a flow meter, which is installed at the water supply end to collect the actual flow value at the water supply end. The controller obtains the actual flow value to determine whether it is a peak water usage period.

[0015] Furthermore, in a single floor, the solenoid valve, pressurized water tank, and water-using end are connected in series on the branch water pipe. When the solenoid valve is closed, the branch water pipe from the solenoid valve to the water-using end constitutes a pressure-maintaining system.

[0016] Furthermore, when the solenoid valves of several adjacent floors are opened simultaneously, the branch water pipes of the corresponding floors are connected together through the main water pipe, and water is supplied to the water-using end of the floor with the largest flow demand in coordination.

[0017] Furthermore, the pressurized water tank is a diaphragm pressure tank. When the water pump starts to supply water to the pipeline network, excess water will be stored in the pressurized water tank, so that a certain volume of pressurized water can be stored inside by air compression.

[0018] Beneficial effects

[0019] The technical solution provided by this utility model has the following advantages compared with the known public technology:

[0020] This invention utilizes a pressure-maintaining system consisting of controllable pressurized water tanks and solenoid valves installed on multiple floors. Combined with a controller that employs a multi-level comparison and judgment mechanism based on collected data, during peak water usage periods, the controller predicts and determines the optimal pressure compensation value based on the water pressure at the supply end and the water pressure at the highest floor, thus saving energy and reducing emissions. During off-peak water usage periods, the pressure-maintaining system supplies water. Since the off-peak period is relatively long, this reduces the problem of repeated pump start-ups and shutdowns, and also mitigates the energy waste caused by excessively high outlet pressure settings during off-peak periods while ensuring sufficient water supply for users. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram illustrating the application scenario of the energy-saving system in this embodiment;

[0023] Figure 2 This is a schematic flowchart of the secondary pressurized water supply method in this embodiment;

[0024] The labels in the diagram represent: 1. Water pump; 2. Pressurized water tank; 3. Solenoid valve; 4. Main water pipeline; 5. Branch water pipeline; 6. Data acquisition module; 7. Controller. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] Example:

[0028] This utility model provides an energy-saving pressure regulating system for a water supply pump set. This energy-saving pressure regulating system is applied to the secondary water supply network of high-rise buildings. (Refer to...) Figure 1The example illustrates the establishment of the pipe network between the water supply and water consumption ends. For ease of explanation, a corresponding most unfavorable point is set on the highest floor of the high-rise building, designated as the water pressure value at the water consumption end of the highest floor, P1. The water pressure values ​​for each floor from the highest floor downwards are designated as Pn, with the water pressure value at the water supply end set as P0.

[0029] The main components of the pressure regulating system in this embodiment include a water tank, a water pump 1, and multiple pressurized water tanks 2. The water pump 1 is located on the water supply side and pressurizes the water through the main water pipeline 4 and delivers it to the branch water pipelines 5 on each floor. The branch water pipelines 5 are connected to the water supply end. The pressurized water tanks 2 are located on the branch water pipelines 5.

[0030] The design includes pressurized water tanks 2 on all floors requiring secondary pressurized water supply. In this embodiment, the pressurized water tank 2 is a diaphragm pressure tank with a certain volume. When the water pump starts to supply water to the pipeline network, excess water is stored in the pressurized water tank. Through the compression of air inside, it can store a certain volume of pressurized water.

[0031] And solenoid valve 3, which is installed on branch water pipe 5 and between pressurized water tank 2 and main water pipe 4, is used to control the opening and closing of branch water pipe 5 and main water pipe 4; when solenoid valve 3 is open, each branch water pipe 5 is connected to the main water pipe 4.

[0032] By installing pressurized water tanks 2 with controllable opening and closing on multiple floors of a high-rise building, and connecting them with solenoid valves 3 in series, a pressure-maintaining system is formed that can independently supply water to the water users.

[0033] And the data acquisition module 6, used to acquire the water pressure value at the water supply end and the water pressure value at the water supply end on each floor, for example... Figure 1 In the middle, the water pressure value at the water supply end is P0;

[0034] The controller outputs control signals to the pressurized water tank, water pump, and solenoid valve based on the real-time water pressure values ​​collected by the acquisition module at the water supply and water consumption ends.

[0035] The controller 7, which is electrically connected to the acquisition module 6, is used to process and calculate the water pressure values ​​at the water supply end and the water consumption end that are collected in real time by the acquisition module 6, and to determine whether it is a peak water consumption period and the water flow demand at the corresponding water consumption end, and output control to the pressurized water tank 2, water pump 1 and solenoid valve 3 respectively.

[0036] In order to obtain the flow rate value at the water supply end, the system also includes a flow meter, which is connected and installed on the water supply end side to collect the actual flow rate value at the water supply end. The controller 7 obtains the actual flow rate value to determine whether it is the peak water consumption period.

[0037] Specifically, in the acquisition of water pressure values ​​at multiple points, the system mainly adopts a distributed acquisition architecture. The acquisition module 6 includes a pressure sensor, a data acquisition terminal, and a wireless communication module. The pressure sensor is installed on the pipeline at the water supply end and multiple water-using ends to collect water pressure data at the location in real time. The data acquisition terminal has multi-channel data acquisition capability, can connect to multiple pressure sensors at the same time, and sends the processed water pressure data to the controller 7 via the wireless communication module.

[0038] In addition to the basic component system, the controller 7, which serves as the control center, includes multiple subsystem units to cooperate with external hardware in executing specific pressure regulation methods. Specifically, the controller 7 includes a database for storing and processing water pressure data sent from the acquisition module 6; and a processing unit for data processing and calculation. The processing unit classifies the acquired water pressure values ​​at the water supply end and the water pressure values ​​at the highest floor to obtain historical data and real-time data, and preprocesses the historical data and real-time data.

[0039] The controller 7 also includes a judgment and comparison unit, which is used to compare the actual flow value at the water supply end to determine whether the current water consumption period is a peak period. 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 peak water consumption period has been reached.

[0040] The system also includes a mathematical model unit for building the prediction model, historical data, and the time of generation to create the prediction model. It outputs prediction information on the water pressure at the supply end and the water pressure at the highest floor. Based on the above prediction information, it determines whether there are any abnormalities in the changing trends of the water pressure at the supply end and the water pressure at the highest floor.

[0041] The comparison unit is also used to compare the water pressure value of a single water terminal with the preset first threshold and second threshold to determine the flow demand of the water terminal; based on the water pressure value Pn of the water terminal on the nth floor, it is determined whether the water terminal on the nth floor has a large flow demand. If so, the water terminal on the nth floor is supplied with water by the pressurized water tank 2 on the nth floor and the pressurized water tank 2 of the cooperating water supply floor on the nth floor; if not, the water terminal on the nth floor is supplied with water by the pressurized water tank 2 on the nth floor.

[0042] For example, when the water pressure at the water outlet on floor n is lower than the first threshold, the water demand at floor n is low. Controller 7 closes the solenoid valve 3 of the pressure-maintaining system on floor n, and the water outlet on floor n is supplied by the pressurized water tank 2 on floor n. When the water outlet is using water, the compressed gas in the pressurized water tank 2 forces the water inside into the pipe network, ensuring the low-flow water demand of the corresponding water outlet on floor n. Naturally, the pressure in the pressurized water tank 2 on floor n also decreases, and the pressure sensor reading at the water outlet on floor n will also decrease accordingly. When the detected water pressure continues to decrease and falls below the set second threshold, the water demand on floor n changes from low-flow to high-flow. The control continues as follows:

[0043] When the water pressure at the nth floor is below the second threshold but above the first threshold, the nth floor experiences high flow demand. Controller 7 then controls the solenoid valve 3 of the nth floor and its cooperating water supply floors to open. Specifically, the cooperating water supply floors for the nth floor include all floors from n-1 to n+3. This multi-floor coordinated water supply ensures sufficient water supply even during periods of high flow demand. It minimizes the issues of secondary pressurization and repeated start-stop cycles of pump 1, and directly reduces the problem of excessively high outlet pressure settings during off-peak water usage periods, maximizing energy savings and achieving energy-saving effects.

[0044] The comparison unit is also used to compare the range of change between real-time data and predicted information with the range of preset information, and to determine whether the change trend of real-time water pressure at the water supply end and water pressure at the highest floor is abnormal. Abnormalities here include, for example, a sudden drop or excessive fluctuation.

[0045] Of course, if the trend of the water pressure at the supply end and the water pressure at the top floor is normal, the controller 7 will directly retrieve the corresponding pressure compensation value from the database in real time based on the real-time data, which will serve as the data basis for system pressurization and ensure the safety and efficiency of pressurization operation.

[0046] However, if the trends in the water pressure values ​​at the supply end and the water pressure values ​​at the highest floor are found to be abnormal,

[0047] Then the inspection calculation unit in controller 7 is required. The inspection calculation unit is used to calculate the pressure compensation value in conjunction with the database when the water pressure value at the water supply end and the water pressure value at the highest floor water supply end show abnormal trends.

[0048] Specifically, 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 supply end of the highest floor, traversing the entire database, and finding the most matching or closest water pressure value at the water supply end and the water pressure value at the water supply end of the highest floor.

[0049] The data mapping area maps the water pressure value at the nearest water supply end to the first pressure compensation value Pa, and maps the water pressure value at the nearest water supply end on the highest floor to the second pressure compensation value Pb.

[0050] In the data comparison area, if the variation range of the water pressure value at the water supply end and the water pressure value at the highest floor exceeds the preset normal range, it will determine whether there is an anomaly:

[0051] First, select the smaller value of the first pressure compensation value Pa and the second pressure compensation value Pb as the pressure compensation value, and control water pump 1 to pressurize once. 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 top floor is initially increased.

[0052] Then, select the difference between the larger and smaller values ​​of the first and second pressure compensation values, IPa-PbI, as the pressure compensation value, and control water pump 1 to perform secondary pressurization. This step is to further adjust the water pressure so that the water pressure at the water supply end and the top floor can reach a relatively balanced state that meets the requirements.

[0053] The system uses controller 7 to determine if it is a peak water usage period. If it is, it performs secondary pressurization by calculating the output pressure compensation value through inspection, ensuring sufficient water supply for high-rise users. If it is an off-peak period, a pressure-maintaining system consisting of solenoid valve 3 and pressurized water tank 2 in branch water pipeline 5 ensures sufficient water supply for users regardless of whether the flow rate is low or high. Because the off-peak period is relatively long, it reduces the problem of repeated start-stop of water pump 1 and, while ensuring sufficient water supply for users, reduces the energy waste caused by excessively high outlet pressure settings during off-peak periods. This solves the problem of significant capacity waste in existing secondary pressurized water supply systems. This solution maximizes energy savings and achieves energy-saving effects. Actual tests show that the energy-saving effect is 10%-15% of the pump room's energy consumption, demonstrating a significant energy-saving effect.

[0054] Reference Figure 2 The steps by which controller 7 implements the specific energy-saving voltage regulation method according to this voltage regulation system include:

[0055] S10: Collect the water pressure value P0 at the water supply end, and the water pressure values ​​P1-Pn at all water-using ends on each floor, and store the collected data in the database.

[0056] S20: Based on the collected water pressure value, determine whether it is currently a peak water usage period. If so, calculate and output the pressure compensation value and perform a pressurization operation; otherwise, proceed to step S30.

[0057] S30, determine whether the water supply terminal of the floor that needs water supply has a large flow demand. If so, the water supply of the water terminal is carried out by the pressurized water tank 2 of the floor where it is located and the pressurized water tanks 2 of the floors above and below it in coordination; otherwise, the pressurized water tank 2 of the floor where the water terminal is located supplies water independently.

[0058] Specifically, when determining whether a water-using end has a large flow demand, the flow demand of the water-using end is determined by comparing the water pressure value of a single water-using end with the preset first threshold and second threshold.

[0059] Specifically, in the process of calculating and outputting pressure compensation values, the core is to initially determine the generation method of the pressure compensation values, select the most suitable generation method, and improve the accuracy of the pressure compensation value data. The specific steps are as follows:

[0060] S21, a predictive model is established using historical water pressure data collected from the database;

[0061] S22, The prediction model is used to output the predicted water pressure values ​​at the water supply end and the water pressure values ​​at the highest floor.

[0062] S23, determine whether the real-time water pressure value at the water supply end and the water pressure value at 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.

[0063] The historical water pressure data collected in the database is determined by the timestamp corresponding to the collection time to determine whether it is historical or real-time data. The database stores historical and real-time data through classification; it is connected to a classification database, which includes a retrieval database and an analysis database. The retrieval database can retrieve data from the classification database, and the analysis database can obtain pressure compensation values ​​for historical time periods based on historical data. A preprocessing unit removes impurities from the data in the historical and real-time databases, resulting in historical and real-time data with accompanying time information.

[0064] In addition, when obtaining the pressure compensation value through inspection calculation, the steps for calculating the compensation value through inspection are as follows:

[0065] S231, find the water pressure values ​​at the supply end and the water pressure values ​​at the highest floor that are closest to the real-time data in the database;

[0066] S232, map the nearest water pressure value at the water supply end to the first pressure compensation value, and map the nearest water pressure value at the water supply end on the highest floor to the second pressure compensation value.

[0067] S233, Select the smaller value of the first pressure compensation value and the second pressure compensation value to perform a pressurization;

[0068] S234, Select the difference between the larger and smaller values ​​of the first and second pressure compensation values ​​for secondary pressurization.

[0069] This pressure regulation method employs a multi-level comparison and judgment mechanism. During peak water usage periods, based on the water pressure values ​​at the supply end and the water pressure values ​​at the highest floor, the controller 7 predicts and judges to generate the optimal pressure compensation value, saving energy and reducing emissions. During off-peak water usage periods, water is supplied through a pressure-maintaining system. Since the off-peak water usage period is relatively long, this reduces the problem of repeated start-stop of the water pump 1 and, while ensuring sufficient water supply for users, also reduces the problem of energy waste caused by excessively high outlet pressure settings during off-peak water usage periods.

[0070] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An energy-saving pressure regulating system for a water supply pump set, wherein the energy-saving pressure regulating system is applied in a water supply network, characterized in that, The water supply network includes branch water pipes distributed on each floor, and a main water pipe connecting multiple branch water pipes, and also includes: A water pump is installed on the water supply side, connecting the water supply tank and the main water pipeline. The water is pressurized and transported to the branch water pipelines on each floor through the main water pipeline, and then connected to the water-using end through the branch water pipelines. A pressurized water tank is connected to multiple branch water pipes; A solenoid valve is installed on the branch water pipe and between the pressurized water tank and the main water pipe to control the on / off connection between the branch water pipe and the main water pipe. The data acquisition module is used to collect the water pressure value at the water supply end and the water pressure value at the water consumption end on each floor. The controller, which is electrically connected to the acquisition module, outputs control commands to operate the pressurized water tank, water pump, and solenoid valve based on the water pressure values ​​collected in real time by the acquisition module at the water supply end and the water pressure values ​​at the water consumption end.

2. The energy-saving pressure regulating system for a water supply pump set according to claim 1, characterized in that, The acquisition module includes a pressure sensor, a data acquisition terminal, and a wireless communication module. The pressure sensor is installed on the pipeline at the water supply end and multiple water-using ends to collect water pressure data at the location in real time. The data acquisition terminal can connect to multiple pressure sensors simultaneously and send the processed water pressure data to the controller via the wireless communication module.

3. The energy-saving pressure regulating system for a water supply pump set according to claim 2, characterized in that, The acquisition module also includes a flow meter, which is installed at the water supply end to collect the actual flow value at the water supply end. The controller obtains the actual flow value to determine whether it is a peak water usage period.

4. The energy-saving pressure regulating system for a water supply pump set according to claim 1, characterized in that, In a single floor, the solenoid valve, pressurized water tank, and water outlet are connected in series on the branch water pipe. When the solenoid valve is closed, the branch water pipe from the solenoid valve to the water outlet forms a pressure-maintaining system.

5. A water supply pump set energy-saving pressure regulating system according to claim 1 or 4, characterized in that, When the solenoid valves of several adjacent floors are opened simultaneously, the branch water pipes of the corresponding floors are connected together through the main water pipe, and water is supplied to the water-using end of the floor with the largest flow demand in coordination.

6. The energy-saving pressure regulating system for a water supply pump set according to claim 1, characterized in that, The pressurized water tank is a diaphragm-type pressure tank. When the water pump starts to supply water to the pipeline network, excess water will be stored in the pressurized water tank, which can store a certain volume of pressurized water through air compression.

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