Sand discharge pump control system

Abstract

The invention discloses a desilting pump control system which comprises an acquisition module, an analysis module and a prediction module, the acquisition module is used for acquiring performance data of a desilting pump, and the analysis module is used for analyzing performance test data of the desilting pump. The method for correcting the objective function by introducing the correction factor comprises the following steps: acquiring performance test data of the sand discharge pump in real time, and analyzing according to the performance test data of the sand discharge pump to obtain an operation model; according to the influence of the sediment content on the efficiency, an efficiency correction factor is introduced to adjust the efficiency of the desilting pump; historical data of the sand discharge pump are obtained, and the sediment content of the next time period is predicted according to the historical data and the real-time data; and calculating optimal configuration by utilizing an algorithm according to a prediction result, and adjusting the running state and the rotating speed of the sand discharge pump according to an optimization result. The silt content in the water body is measured in real time, the efficiency correction factor of the pump is calculated, the efficiency of the desilting pump in actual operation is reflected, the performance and energy consumption of the water pump are accurately evaluated, and optimization of configuration of the water pump is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sand discharge pump control, and in particular to a sand discharge pump control system. Background Art

[0002] In the fields of water conservancy, water treatment and pump station operation, the performance and efficiency of the sand pump as a key equipment directly affect the operating cost and water supply quality of the pump station. Especially when dealing with water bodies with different sediment contents, the performance of the sand pump will be significantly affected. The traditional pump station operation mode often ignores the specific impact of sediment content on pump performance, resulting in low pump operation efficiency, high energy consumption, and easy failure due to sediment blockage. Changes in sediment content will directly affect the head, power and efficiency of the sand pump. In water bodies with high sediment content, the pump inlet and flow channel are prone to blockage, resulting in a decrease in the pump head, an increase in power and a decrease in efficiency. This not only increases the operating cost of the pump station, but may also affect the stability and reliability of the water supply. Therefore, real-time monitoring of the sediment content in the water body and adjusting the pump operating parameters according to changes in sediment content are the key to improving the pump operation efficiency.

[0003] For example, Chinese patent publication number CN113156817B discloses a method for intelligent pump allocation in a pump station, comprising: step S1, obtaining water pump performance test data of the pump station, analyzing the water pump performance test data, and obtaining an optimized operation model of the pump station; step S2, obtaining historical water demand data of the water supply area, analyzing the historical water demand data of the water supply area, and predicting the water supply of the pump station in the next preset time period; step S3, processing the water supply of the pump station in the next preset time period and a preset pressure according to the optimized operation model of the pump station, and obtaining an optimized pump allocation plan.

[0004] The pump station in the comparative document is susceptible to blockage by large particles of mud, stones and aquatic plants during long-term operation, which affects the normal operation of the pump. The pump is not cleaned in the comparative document to avoid the risk of blockage by large particles of mud and improve the operating stability and reliability of the pump. Summary of the invention

[0005] The present application provides a sand removal pump control system, which measures the sand content in the water body in real time, introduces an efficiency correction factor, corrects the objective function, and sets a reverse cleaning pipe on the water outlet side of the box body to reversely clean the pump body to avoid the risk of large particles of sand clogging the sand removal pump.

[0006] The present application provides a sand discharge pump control system, including a collection module, an analysis module and a prediction module, wherein the collection module is used to obtain performance data of the sand discharge pump, the analysis module is used to analyze the performance test data of the sand discharge pump, and the prediction module is used to predict the sediment content of the sand discharge pump in the next period according to historical data; the method for correcting the objective function by introducing a correction factor includes:

[0007] S101, acquiring performance test data of a sand discharge pump in real time, analyzing the performance test data of the sand discharge pump to obtain an operation model, wherein the operation model includes an objective function and constraint conditions, and the performance test data includes the head, power, efficiency, and performance data of the sand discharge pump under different sediment contents;

[0008] S102, according to the influence of sediment content on efficiency, an efficiency correction factor is introduced to adjust the efficiency of the sediment pump;

[0009] S103, obtaining historical data of the sediment pump, and predicting the sediment content and water demand in the next period based on the historical data and real-time data;

[0010] S104, according to the prediction result, the optimal configuration of the sand discharge pump is calculated using a genetic algorithm, and the operating state and speed of the sand discharge pump are adjusted according to the optimization result.

[0011] Preferably, the objective function is, where m is the number of constant speed pumps in the pumping station, n is the number of variable frequency pumps in the pumping station, is the operating status of the constant speed pump, is the operating status of the variable frequency pump, is the power of the constant speed pump, is the power of the variable frequency pump, and F is the objective function value, which represents the operating cost of the pumping station.

[0012] Preferably, the objective function is corrected according to the introduced efficiency correction factor, and the corrected objective function is =, wherein the objective function F represents the operating cost of the pump station, which is composed of the energy consumption of the fixed speed pump and the variable frequency pump, represents the rated power of the i-th fixed speed pump, represents the operating status of the i-th fixed speed pump, where 1 represents on and 0 represents off, represents the rated power of the j-th variable frequency pump at the rated speed, represents the speed ratio of the j-th variable frequency pump, represents the correction factor for the efficiency of the j-th variable frequency pump due to changes in the sediment content in the water, m represents the number of fixed speed pumps in the pump station, and n represents the number of variable frequency pumps in the pump station.

[0013] Preferably, the steps of reverse cleaning pipe work are:

[0014] S201, a plurality of sand removal pumps form a box body, a filter screen is fixedly installed at the water inlet of the box body, and a reverse cleaning pipe is arranged at the water outlet side of the box body;

[0015] S202, real-time monitoring of parameters such as sediment content, head, power and efficiency of the sediment discharge pump, and collection and recording of continuous operating data of the sediment discharge pump under different sediment contents;

[0016] S203, based on the data collected in step S202, establish an operating condition change curve and set high, medium and low operating condition intervals;

[0017] S204, based on the collected historical data, a threshold value of the energy consumption index is preset. When the energy consumption of the sand discharge pump exceeds the set threshold value of the energy consumption index, an early warning mechanism is triggered to stop the operation of the sand discharge pump and start reverse cleaning.

[0018] Preferably, a reverse flushing pipe is arranged on the water outlet side of the box body, and a flange is arranged on the reverse flushing pipe, and the flange matches the flange on the box body.

[0019] Preferably, the high operating condition interval refers to the working state of the sand discharge pump when it reaches the maximum output capacity. On the operating condition change curve, the high operating condition interval is located in the upper right part of the curve; the medium operating condition interval refers to the state of the sand discharge pump under normal and stable working conditions. On the operating condition change curve, the medium operating condition interval is located in the middle part of the curve; the low operating condition interval refers to the working state of the sand discharge pump when the output capacity is low. On the operating condition change curve, the low operating condition interval is located in the lower left part of the curve.

[0020] Preferably, the performance parameters and output energy consumption of the sand removal pump are detected in real time, and the sand removal pump in the medium or low operating range is adjusted to the high operating range by adjusting the rotation speed, the cleaning strategy and the downtime.

[0021] Preferably, different contents of sediment flow into different sediment pumps:

[0022] S401, based on the collected historical data of sediment content, the method is: statistically analyzing the collected historical data, drawing a graph of sediment content changing over time, and establishing a simulation model based on the graph;

[0023] S402, according to the box in step S201, a plurality of screens are arranged in the box;

[0024] S403, monitoring the sediment content through the chart of step S401 and adjusting the screen by adjusting the knob, so that sediments of different contents flow into different sediment discharge pumps.

[0025] Preferably, several sieves are arranged in the box, and the sieves have different apertures. The sieves with different apertures are arranged from large to small. Several knobs are arranged outside the box, and the knobs are connected to the sieves through shafts. The shafts are fixedly mounted on the sieves, and the number of knobs, the number of shafts and the number of sieves are the same.

[0026] Preferably, different contents of sediment are separated by rotating sieves with different apertures. If the sediment content is high, the large-aperture sieve can be rotated to a position parallel to the top of the box for preliminary filtration. If the sediment content is low, the small-aperture sieve can be rotated to a position parallel to the top of the box or directly enter the bypass.

[0027] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0028] By measuring the sediment content in the water in real time and calculating the efficiency correction factor of each water pump, the efficiency of the sediment pump in actual operation is accurately reflected, and the performance and energy consumption of the water pump can be more accurately evaluated, which helps to optimize the configuration of the water pump.

[0029] A filter is fixedly installed at the water inlet of the box to effectively prevent large particles of impurities from entering the pump body. A reverse cleaning pipe is set to remove sediment and blockages inside the pump body. The reverse cleaning pipe can generate greater flushing force, which helps to completely remove dirt inside the pump body.

[0030] Suitable pump types are selected according to the high, medium and low operating conditions to ensure efficient operation of the pump under different operating conditions. By adjusting the speed of the variable speed pump and the frequency and duration of reverse cleaning, the sand discharge pump in the medium or low operating condition range is adjusted to the high operating condition range, avoiding energy waste caused by over-matching or under-matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flow chart of a sand discharge pump control system of the present invention;

[0032] Figure 2 A schematic diagram of a control system according to an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the reverse cleaning pipe operation process of an embodiment of the present invention;

[0034] Figure 4 It is a schematic diagram of the flow of different contents of sediment flowing into different sediment pumps according to an embodiment of the present invention;

[0035] Figure 5 It is a schematic structural diagram of a reverse clean water pipe according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0037] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] Embodiment 1: Figure 1 The present invention is a flow chart of a control system for a sand discharge pump according to an embodiment of the present invention, which includes a collection module, an analysis module and a prediction module. The collection module is used to obtain performance data of the sand discharge pump, the analysis module is used to analyze the performance test data of the sand discharge pump, and the prediction module is used to predict the sediment content of the sand discharge pump in the next period according to historical data. The method for correcting the objective function by introducing a correction factor includes the following steps:

[0040] S101, acquiring performance test data of a sand discharge pump in real time, analyzing the performance test data of the sand discharge pump to obtain an operation model, wherein the operation model includes an objective function and constraint conditions;

[0041] The performance test data of the sand discharge pump is the head, power, efficiency of the sand discharge pump corresponding to different flow rates at the rated speed or a certain speed, and the performance data under different sediment contents. For the measurement of sediment content, a sediment concentration monitor is installed at the water inlet of the sand discharge pump station to measure the sediment content in the water body in real time, and collect the instantaneous speed, instantaneous head, instantaneous flow rate and power consumption and other performance parameters of the sand discharge pump in real time. The collected data includes at least fourteen groups. The data are divided according to the model and sediment content of the sand discharge pump to obtain multiple data sets, each of which includes a feature name and a feature value. The feature name includes flow rate, power, efficiency, sediment content, etc., and the feature value is the corresponding measurement data; according to the obtained data set, the sediment content and power decibel are imported into two arrays, and a trend line is drawn according to the array data. The horizontal axis of the trend line represents the sediment content, and the vertical axis represents the power. The drawn trend line represents the relationship between the sediment content and the power. Similarly, according to the above method, a trend line between the sediment content and the efficiency and a trend line between the sediment content and the flow are drawn, and an operation model is established according to the obtained trend line.

[0042] The operation model includes an objective function and constraints. The objective function is:

[0043]

[0044] , where m is the number of fixed speed pumps in the pump station, n is the number of variable frequency pumps in the pump station, and w i is the operating status of the fixed speed pump (usually expressed as a binary number, such as 1 for running and 0 for stopping), w j is the operating status of the variable frequency pump (also expressed as a binary number), N i is the power of the fixed speed pump, N j is the power of the variable frequency pump (varies according to the speed ratio), F is the objective function value, representing the operating cost of the pump station; the constraints include outlet pressure constraint, total water flow constraint, variable frequency speed ratio constraint and flow range constraint, the outlet pressure constraint includes configuring the outlet pressure of each parallel sand removal pump to a set pump station water supply pressure, the total water flow constraint includes configuring the sum of the flow rates of each sand removal pump in the pump station to a set pump station water supply flow, the variable frequency speed ratio constraint includes the speed ratio of the variable frequency pump has a minimum speed ratio and a maximum speed ratio, exceeding this range, the performance of the pump is limited, the flow range constraint includes the high-efficiency flow range of the variable frequency pump and the high-efficiency flow range of the fixed speed pump.

[0045] S102, according to the influence of sediment content on efficiency, an efficiency correction factor is introduced to adjust the efficiency of the sediment pump.

[0046] The objective function is corrected according to the introduced efficiency correction factor, and the corrected objective function is: The objective function F represents the operating cost of the pumping station, which is composed of the energy consumption of the fixed speed pump and the variable frequency pump. i represents the rated power of the i-th fixed-speed pump, w i Indicates the operating status of the i-th fixed speed pump (0 or 1), where 1 means on and 0 means off. j It represents the rated power of the jth variable frequency pump at the rated speed. represents the speed ratio of the jth variable frequency pump, η represents the correction factor on the efficiency of the jth variable frequency pump due to the change of sediment content in the water, m represents the number of fixed speed pumps in the pumping station, and n represents the number of variable frequency pumps in the pumping station.

[0047] S103, obtaining historical data of the sediment pump, and predicting the sediment content and water demand in the next period based on the historical data and real-time data.

[0048] The collected historical data are converted into a time series data set, where the input features may include historical water consumption, sediment content, time, weather conditions, etc., and the output is the corresponding water demand and sediment content forecast value for the next time period. The time series data set is divided into a training set, a test set, and a validation set. The training set is used to train the model, the test set is used to evaluate the generalization ability of the model, and the validation set is used to verify the model performance during the model tuning process; a water supply and sediment discharge prediction model is established, and the model is trained using time series analysis. During the training process, the model parameters are adjusted using the training set data to minimize the prediction error. The model is evaluated using the test set and the validation set to ensure that the model can also show good prediction performance on unseen data. The water demand data and sediment content data collected in the previous preset time period are input into the trained water supply and sediment discharge prediction model. The model processes the data and predicts the average hourly water consumption and sediment content in the next preset time period.

[0049] S104, according to the prediction results, the optimal configuration of the sand removal pump is calculated using a genetic algorithm, and the operating state and speed of the water pump are adjusted according to the optimization results to achieve real-time control.

[0050] The configuration of the sand pump is encoded. Binary encoding can be used to represent the on / off state of the sand pump, where "1" represents on and "0" represents off. For the speed ratio, real number encoding can be used to represent it as a floating point number within the allowable range. A set of initial solutions are randomly generated as the starting population of the genetic algorithm. Each solution is a sand pump configuration scheme, represented by a set of codes. The fitness function is used to evaluate the pros and cons of each solution according to the constraints. According to the fitness value, the excellent solution is selected as the parent of the next generation. The selected parent is crossover to generate a new solution. The crossover operation can be performed by single-point crossover, double-point crossover or uniform crossover. The offspring is mutated to introduce new genes. The selection, crossover and mutation operations are repeated until the preset number of iterations is reached. After the iteration, the solution with the highest fitness is selected from the final population as the optimal solution. Then, this optimal solution is decoded to obtain the optimal configuration scheme of the sand pump.

[0051] In some embodiments, the pump station has two fixed speed pumps and two variable frequency pumps. An individual in the initial population is encoded as follows: the first fixed speed pump is 1 (on), the second fixed speed pump is 0 (off), the speed ratio of the first variable frequency pump is 0.75, and the speed ratio of the second variable frequency pump is 0.85. The individuals entering the next generation are selected according to the fitness of the individuals. Individuals with high fitness have a higher probability of being selected. For the selected individuals, a recombination operation is performed to generate new individuals. During the recombination process, the binary coded part and the real number coded part need to be processed separately, and the individuals in the recombined or initial population are transformed. The mutation rate is usually low to prevent the algorithm from converging to the local optimal solution too early. For binary coding, a bit is randomly flipped; for real number coding, the value can be randomly adjusted within a certain range. The fitness of the newly generated individuals is evaluated again to determine their relative advantages and disadvantages in the population. The process of selection, recombination, mutation and fitness evaluation is repeated until the preset termination condition is met. When the algorithm terminates, the individual with the highest fitness is output as the optimal solution, that is, a set of optimized pump allocation schemes is obtained, including the operating status and speed ratio of each pump.

[0052] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0053] By measuring the sediment content in the water body in real time and calculating the efficiency correction factor of each water pump based on it, the efficiency of the sediment pump in actual operation can be more accurately reflected, which helps to more accurately evaluate the performance and energy consumption of the water pump. After considering the impact of sediment content on efficiency, the configuration of the water pump can be optimized more scientifically. By adjusting the operating status and speed of the water pump, it can be ensured that the pump station can meet the water supply demand while minimizing energy consumption. When predicting the sediment content and water demand in the next period, combined with the efficiency correction factor, the accuracy of the prediction can be improved. This will help the pump station better cope with future water supply challenges.

[0054] Embodiment 2: Based on the correction factor introduced in the above embodiment 1, the objective function is optimized and corrected to make the operation efficiency of the sand removal pump higher. When the sand removal pump is running, large particles of mud, stones and aquatic plants will block the water inlet and affect the operation of the sand removal pump. By setting up a cleaning water pump and pipeline, the risk of blockage by large particles of mud and sand can be avoided.

[0055] S201, a plurality of sand removal pumps form a box body, a filter screen is fixedly installed at the water inlet of the box body, and a reverse cleaning pipe is arranged at the water outlet side of the box body.

[0056] The filter at the water inlet of the box can block large particles of impurities such as stones and water plants from entering the pump body, preventing blockage and interference with the normal operation of the pump; a reverse cleaning pipe is installed on the water outlet side of the box, and a flange is provided on the reverse cleaning pipe. The flange matches the flange on the box to ensure the sealing of the connection between the reverse cleaning pipe and the box. One end of the reverse cleaning pipe extends to the inside of the sand pump to clean the sand pump, and the other end is connected to the water pump. The reverse cleaning pipe is used to clean the inside of the sand pump. Reverse flushing of the reverse cleaning pipe can more effectively remove sediments and blockages inside the pump body. Since the flushing water is in the opposite direction of the sediment inside the pump body, it can generate a greater flushing force, which helps to completely remove the dirt inside the pump body.

[0057] S202, real-time monitoring of parameters such as sediment content, head, power and efficiency of the sediment discharge pump, and collection and recording of continuous operating data of the sediment discharge pump under different sediment contents.

[0058] Use a sediment concentration monitor to monitor the sediment content in real time, and use a pressure sensor and flow meter to monitor the head of the sand discharge pump in real time, monitor the changes in the head of the sand discharge pump under different working conditions, and monitor the head, sediment content, flow rate and other parameters.

[0059] S203, based on the data collected in step S202, establish an operating condition change curve and set high, medium and low operating condition ranges.

[0060] The collected data were checked to identify errors and invalid data, and the errors and invalid data were cleaned. Based on the cleaned data, MATLAB was used to draw the operating condition change curve. The sediment content was used as the independent variable, and the head, power and efficiency were used as the dependent variables. The operating condition change curves of the sand discharge pump under different sediment contents were drawn respectively, and the high, medium and low operating condition intervals were marked on the curve graph. Among them, the high operating condition interval usually refers to the working state of the sand discharge pump when it is close to or reaches its designed maximum output capacity. In this interval, the performance parameters of the sand discharge pump are at the highest level. On the operating condition change curve, the high operating condition interval is located in the upper right corner of the curve; the medium operating condition interval refers to It refers to the state of the sand discharge pump under normal and stable working conditions. In the medium operating range, the performance parameters of the sand discharge pump are at a moderate level, which can meet the work needs and will not cause excessive burden on the equipment. On the operating condition change curve, the medium operating range is located in the middle part of the curve, indicating the performance of the sand discharge pump under medium output state; the low operating range refers to the working state of the sand discharge pump when the output capacity is low. In the low operating range, the performance parameters of the sand discharge pump are at a low level and cannot meet certain high-demand work scenarios. On the operating condition change curve, the low operating range is located at the lower left of the curve, indicating the performance of the pump under low output state.

[0061] S204, based on the collected historical data, a threshold value of the energy consumption index is preset. When the energy consumption of the sand discharge pump exceeds the set threshold value of the energy consumption index, an early warning mechanism is triggered to stop the operation of the sand discharge pump and start reverse cleaning.

[0062] The threshold of the consumption index is set based on the statistical analysis of historical data, the design parameters and efficiency curve of the sand removal pump, and the actual operation and maintenance experience. When it is monitored that the energy consumption of the sand removal pump exceeds the set threshold, the system immediately triggers the early warning mechanism. After receiving the early warning signal, the operation and maintenance personnel stop the operation of the sand removal pump to prevent equipment damage or safety accidents caused by continued excessive energy consumption. After shutdown, check and confirm the status of the sand removal pump and its connecting pipes, use the reverse cleaning pipe to change the direction of the water flow, and inject high-pressure water from the outlet of the box to effectively remove the accumulated mud, impurities, etc. in the pump body and pipeline, and restore the normal flow capacity and operation efficiency of the equipment.

[0063] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0064] The filter screen fixedly installed at the water inlet of the box can prevent large impurities such as stones and water plants from entering the pump body, causing blockage of the pump body and seriously affecting the normal operation of the pump. The filtering effect of the filter screen can effectively reduce the risk of internal wear and damage of the pump body, thereby extending the service life of the pump;

[0065] The reverse cleaning pipe set on the water outlet side of the box body is used to reverse clean the pump body to remove the sediment and blockage inside the pump body. Since the flushing water is in the opposite direction of the sediment, it can generate a greater flushing force, which helps to thoroughly remove dirt, effectively prevent pump body failure caused by sediment accumulation, and ensure the stable operation of the pump.

[0066] Embodiment 3: Based on the description of high, medium and low working conditions in embodiment 2, in this embodiment, the high, medium and low working condition intervals are combined with the selection and shutdown of the pump, so that the sand discharge pump returns to the high working interval.

[0067] Select the type of pump according to the working conditions in the high, medium and low operating ranges. Centrifugal pumps are suitable for working conditions with large flow and low head, and positive displacement pumps are suitable for working conditions with high head and small flow. For high-temperature and high-viscosity media, select pumps with special materials and high-temperature resistance. For explosion-proof occasions, select explosion-proof pumps. Determine the frequency and duration of reverse cleaning based on the operating characteristics and working conditions of the selected pump. For media that are prone to scaling, clean the sand pump twice a week, each time for 1 hour. For high-temperature and high-viscosity media, clean the sand pump three times a week, each time for 2 hours.

[0068] Real-time detection of sand removal pump performance parameters and output energy consumption, according to the detected sand removal pump performance parameters and output energy consumption to determine the sand removal pump operating range, if the sand removal pump is in the high operating range, no adjustment is required, if the sand removal pump is in the medium or low operating range, by adjusting the speed of the variable speed pump to change the speed pump performance curve, the pump flow, head, and adopt a reverse cleaning strategy, adjust the frequency and duration of reverse cleaning, the pump is seriously scaled, you can increase the number and duration of cleaning, adjust the frequency and duration of shutdown, make a plan for the sand removal pump for regular maintenance, based on the above adjustment of speed, adjustment of cleaning strategy and adjustment of shutdown duration, the sand removal pump in the medium or low operating range is adjusted to the high operating range.

[0069] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0070] According to the different working conditions of high, medium and low, the appropriate pump type is selected to ensure the efficient operation of the pump under different working conditions. By adjusting the speed of the variable speed pump, the performance curve of the pump can be flexibly changed to make the flow and head of the pump more in line with actual needs, avoiding energy waste caused by over-matching or under-matching. For working conditions prone to scaling and high temperature and high viscosity media, a scientific reverse cleaning strategy is formulated to effectively reduce the risk of scaling and clogging in the pump and maintain the efficient operation of the pump. By formulating a regular maintenance plan, pump problems can be discovered and dealt with in a timely manner, avoiding downtime losses caused by failures, and also extending the service life of the pump.

[0071] Embodiment 4: Real-time monitoring of sediment content in embodiment 1, this embodiment simulates the change of sediment content in real time. At the same time, a screen is set in the box to allow water with different sediment content to enter different pumps, thereby improving the overall work efficiency.

[0072] S401, based on the collected historical data of sediment content, statistical analysis is performed on the collected historical data, a graph showing the change of sediment content over time is drawn, and a simulation model is established based on the graph.

[0073] Conduct statistical analysis on the collected historical data, calculate statistical indicators such as the mean, maximum, minimum, and standard deviation of the sediment content to represent the overall distribution and fluctuation of the sediment content, and draw a graph of the sediment content over time based on the calculated mean, maximum, minimum, and standard deviation. Observe the changing trend and periodicity of the sediment content through the graph; use historical data to build a time series model, use a portion of the historical data as a validation set to validate the constructed model, input the historical data into the simulation model, and the simulation model outputs the predicted results.

[0074] S402, according to the box in step S201, a plurality of screens are arranged in the box.

[0075] A plurality of sieves with different apertures are arranged in a box body, and the sieves with different apertures are arranged from large to small so as to be adjusted according to different sand contents. A plurality of knobs are arranged outside the box body, and the plurality of knobs are connected to the sieves through shafts, and the shafts are fixedly mounted on the sieves, and the number of the knobs, the number of the shafts and the number of the sieves are the same.

[0076] S403, by monitoring the sediment content, the screen is adjusted by adjusting the knob so that sediment of different contents flows into different pumps.

[0077] By rotating the knob 90 degrees, the screen rotates 90 degrees in the box, and the screen rotates from parallel to the top of the box to perpendicular to the top of the box. The knob can be rotated clockwise or counterclockwise. When the screen rotates to a position perpendicular to the top of the box, it means that the screen does not screen the sediment. Sediment with different contents can be divided by rotating screens with different apertures. If the sediment content is high, the large-aperture screen can be rotated to a position parallel to the top of the box for preliminary filtration. If the sediment content is low, the small-aperture screen can be rotated to a position parallel to the top of the box or directly enter the bypass. Sediment with different contents can be divided into different paths through screens of different specifications, and enter different sand discharge pumps through different paths. Different sand discharge pumps are connected to different screens through pipes.

[0078] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0079] A number of sieves with different apertures are arranged in the box, and the sieves can be flexibly adjusted by a knob. The sieves can be adjusted according to the different sand contents, which improves the flexibility and accuracy of sediment screening. The reasonable arrangement of the sieves and the arrangement of apertures from large to small help to gradually filter the sediment. By monitoring the sediment content and adjusting the knob, different contents of sediment can flow into different pumps.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand discharge pump control system, characterized in that: It includes a collection module, an analysis module and a prediction module. The collection module is used to obtain the performance data of the sand discharge pump, the analysis module is used to analyze the performance test data of the sand discharge pump, and the prediction module is used to predict the sediment content of the sand discharge pump in the next period according to historical data; The methods for correcting the objective function by introducing correction factors include: S101, acquiring performance test data of a sand discharge pump in real time, analyzing the performance test data of the sand discharge pump to obtain an operation model, wherein the operation model includes an objective function and constraint conditions, and the performance test data includes the head, power, efficiency, and performance data of the sand discharge pump under different sediment contents; S102, according to the influence of sediment content on efficiency, an efficiency correction factor is introduced to adjust the efficiency of the sediment pump; S103, obtaining historical data of the sediment pump, and predicting the sediment content and water demand in the next period based on the historical data and real-time data; S104, according to the prediction result, the optimal configuration of the sand discharge pump is calculated using a genetic algorithm, and the operating state and speed of the sand discharge pump are adjusted according to the optimization result.

2. A sand pump control system as claimed in claim 1, characterized in that: The objective function is Where m is the number of fixed speed pumps in the pump station, n is the number of variable frequency pumps in the pump station, and w is the number of fixed speed pumps in the pump station. i is the operating state of the fixed speed pump, w j is the operating status of the variable frequency pump, N i is the power of the fixed speed pump, N j is the power of the variable frequency pump, and F is the objective function value, which represents the operating cost of the pumping station.

3. A sand pump control system as claimed in claim 1, characterized in that: The objective function is corrected according to the introduced efficiency correction factor, and the corrected objective function is: The objective function F represents the operating cost of the pumping station, which is composed of the energy consumption of the fixed speed pump and the variable frequency pump. i represents the rated power of the i-th fixed-speed pump, w i Indicates the operating status of the i-th fixed speed pump, where 1 means on and 0 means off. j It represents the rated power of the jth variable frequency pump at the rated speed. represents the speed ratio of the jth variable frequency pump, η represents the correction factor on the efficiency of the jth variable frequency pump due to the change of sediment content in the water, m represents the number of fixed speed pumps in the pumping station, and n represents the number of variable frequency pumps in the pumping station.

4. A sand removal pump control system as claimed in claim 1, characterized in that: Steps for reverse cleaning pipe work: S201, a plurality of sand removal pumps form a box body, a filter screen is fixedly installed at the water inlet of the box body, and a reverse cleaning pipe is arranged at the water outlet side of the box body; S202, real-time monitoring of parameters such as sediment content, head, power and efficiency of the sediment discharge pump, and collection and recording of continuous operating data of the sediment discharge pump under different sediment contents; S203, based on the data collected in step S202, establish an operating condition change curve and set high, medium and low operating condition intervals; S204, based on the collected historical data, a threshold value of the energy consumption index is preset. When the energy consumption of the sand discharge pump exceeds the set threshold value of the energy consumption index, an early warning mechanism is triggered to stop the operation of the sand discharge pump and start reverse cleaning.

5. A sand removal pump control system as claimed in claim 4, characterized in that: A reverse cleaning pipe is arranged on the water outlet side of the box body, and a flange is arranged on the reverse cleaning pipe, and the flange matches the flange on the box body.

6. A sand removal pump control system as claimed in claim 4, characterized in that: The high operating condition interval refers to the working state of the sand discharge pump when it reaches the maximum output capacity. On the operating condition change curve, the high operating condition interval is located in the upper right part of the curve; the medium operating condition interval refers to the state of the sand discharge pump under normal and stable working conditions. On the operating condition change curve, the medium operating condition interval is located in the middle part of the curve; the low operating condition interval refers to the working state of the sand discharge pump when the output capacity is low. On the operating condition change curve, the low operating condition interval is located in the lower left part of the curve.

7. A sand removal pump control system as claimed in claim 6, characterized in that: Real-time detection of sand removal pump performance parameters and output energy consumption, by adjusting the speed, cleaning strategy and downtime, the sand removal pump in the medium or low operating range is adjusted to the high operating range.

8. A sand removal pump control system as claimed in claim 1, characterized in that: Different contents of sediment flow into different sediment pump methods: S401, based on the collected historical data of sediment content, statistically analyzing the collected historical data, drawing a graph of sediment content changing over time, and establishing a simulation model based on the graph; S402, according to the box in step S201, a plurality of screens are arranged in the box; S403, monitoring the sediment content through the chart of step S401 and adjusting the screen by adjusting the knob, so that sediments of different contents flow into different sediment discharge pumps.

9. A sand removal pump control system as claimed in claim 8, characterized in that: A plurality of sieves are arranged in the box, and the sieves have different apertures. The sieves with different apertures are arranged from large to small. A plurality of knobs are arranged outside the box, and the knobs are connected to the sieves through shafts. The shafts are fixedly mounted on the sieves. The number of knobs, the number of shafts and the number of sieves are the same.

10. A sand removal pump control system as claimed in claim 8, characterized in that: By rotating sieves with different apertures, different contents of sediment can be separated. If the sediment content is high, the large-aperture sieve can be rotated to a position parallel to the top of the box for preliminary filtration. If the sediment content is low, the small-aperture sieve can be rotated to a position parallel to the top of the box or directly enter the bypass.

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