System and method for controlling direction of fluid in pipeline, terminal and storage medium

Abstract

The invention relates to the technical field of chemical engineering automatic control, and particularly provides a system and method for controlling the direction of fluid in a pipeline, a terminal and a storage medium, and the system comprises a mass flowmeter, a first valve, a second valve and a control unit; the mass flow meter, the first valve and the second valve are all connected with the control unit; the control unit receives fluid parameters measured by the mass flow meter; the mass flow meter is respectively connected with the first valve and the second valve through the same pipeline; the control unit controls opening and closing of the first valve and / or the second valve based on fluid parameters; the first valve is arranged in the unqualified product pipeline, and the second valve is arranged in the qualified product pipeline. The fluid entering the backflow area does not need to be calculated repeatedly, and the manual workload is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical automatic control, and particularly relates to a fluid direction control system, method, terminal and storage medium in a pipeline. Background Art

[0002] In industrial production processes such as chemical engineering, pharmaceuticals, and food processing, the direction control and mass measurement of fluids are important links to ensure product quality and production efficiency. For certain specific process requirements, such as the density control of liquid products, it is necessary to ensure that the density of the fluid reaches the preset standard before entering the finished product tank area to ensure the quality stability of the final product.

[0003] Currently, mass flow meters are usually used in industrial production to measure the density and mass of fluids. However, in traditional production processes, operators usually need to manually monitor the fluid density data and manually adjust the opening or closing of valves to determine the flow direction of the fluid. This method not only increases the labor intensity but also easily causes production errors due to human judgment errors, affecting the consistency of product quality. Moreover, when the fluid density does not meet the requirements and is sent back to the previous process section for re-evaporation, the flow meter will still continue to measure the mass and flow rate of the fluid. This means that even if the liquid circulates back and forth in the pipeline multiple times, each return flow will be included in the mass accumulation data, resulting in the finally recorded flow data being greater than the actual output. Therefore, operators need to manually deduct the flow rate of the return flow part on the computer to ensure the accuracy of the final statistical data. However, this manual operation process is cumbersome, error-prone, and increases the complexity of production management, which is not conducive to improving the automation level. Summary of the Invention

[0004] Aiming at the problems in the prior art that when controlling the direction of fluid in a pipeline, it is necessary to manually open the valve switch to control the flow direction of unqualified fluid to the return area or control the flow direction of qualified fluid to the finished product area, and when the fluid density is unqualified, the flow meter will repeatedly count the flow rate of the fluid flowing to the return area, resulting in the flow meter reading being greater than the actual output. Therefore, it is necessary to manually subtract the mass of the fluid flowing to the return area, and the steps are cumbersome and error-prone. So, the present invention provides a fluid direction control system, method, terminal and storage medium in a pipeline, which can automatically control the flow direction of the fluid to the return area or the finished product area according to whether the fluid is qualified, without the need for manual judgment and opening of the valve to achieve the diversion of the fluid, and through the partition of the fluid flow direction, the flow meter can intelligently detect the indicators of the fluid, avoiding the repeated counting of the fluid mass and reducing the steps of manually calculating the repeated fluid mass to solve the above technical problems.

[0005] In the first aspect, the present invention provides a fluid direction control system in a pipeline, including: A mass flow meter, a first valve, a second valve and a control unit; The mass flowmeter, the first valve, and the second valve are all connected to the control unit; The control unit receives the fluid parameters measured by the mass flowmeter; The mass flowmeter and the pipeline are respectively connected to the first valve and the second valve; The control unit controls the opening and closing of the first valve and / or the second valve based on the fluid parameters; The first valve is arranged in the unqualified product pipeline, and the second valve is arranged in the qualified product pipeline.

[0006] Furthermore, it further includes: a storage tank and a pump; A liquid level gauge is arranged in the storage tank. The storage tank is connected to the front end of the second pipeline, and the rear end of the second pipeline is connected to the mass flowmeter. A pump is arranged in the second pipeline between the storage tank and the mass flowmeter; The liquid level gauge and the pump are both connected to the control module; The liquid level gauge is used to detect the liquid level in the storage tank and control the operating frequency of the pump based on the liquid level in the storage tank.

[0007] Furthermore, it further includes: an evaporator and a finished product tank area; The evaporator is connected to the front end of the first pipeline, and the rear end of the first pipeline is connected to the storage tank; The unqualified product pipeline is connected to the evaporator; the qualified product pipeline is connected to the finished product tank area.

[0008] Furthermore, the control module is used to receive the density of the fluid detected by the mass flowmeter: If the density is less than the preset threshold, control the first valve to open, the second valve to close, and output the density and instantaneous flow rate of the fluid detected by the mass flowmeter; If the density is greater than or equal to the preset threshold, control the first valve to close, the second valve to open, and output the density, instantaneous flow rate, and cumulative mass of the fluid detected by the mass flowmeter.

[0009] Furthermore, it further includes: a human - machine interface; The human - machine interface is connected to the control module and is used to display the density, instantaneous flow rate, and cumulative mass detected by the mass flowmeter.

[0010] Furthermore, the human - machine interface further includes: It is used to display the liquid level of the fluid in the storage tank.

[0011] In a second aspect, the present invention provides a method for controlling the fluid direction in a pipeline, including: The fluid is stored in the evaporator for evaporation. The pump is started at a preset frequency. The fluid enters the storage tank from the first evaporator and then enters the pipeline. A mass flowmeter is arranged in the pipeline; The mass flowmeter detects the density of the fluid: If the density of the fluid is less than the preset threshold, the first valve is opened and the second valve is closed, and the fluid returns to the first evaporator through the pipeline for re-evaporation, and the mass flowmeter does not detect the mass of the fluid; If the density of the fluid is greater than or equal to the preset threshold, the second valve is opened and the first valve is closed, and the fluid enters the finished product tank area, and the mass flowmeter detects the mass of the fluid.

[0012] Furthermore, it also includes: controlling the liquid level of the fluid in the temporary storage tank, including: Detecting the liquid level of the fluid in the temporary storage tank: If the liquid level of the fluid in the temporary storage tank is greater than or equal to the preset first liquid level threshold, the mass flowmeter detects the instantaneous flow rate of the fluid and automatically adjusts the operating frequency of the pump; If the liquid level of the fluid in the temporary storage tank is less than the preset second liquid level threshold, wait until the liquid level of the fluid in the temporary storage tank reaches the first liquid level threshold, and then perform the detection of the instantaneous flow rate of the fluid by the mass flowmeter and the automatic adjustment of the operating frequency of the pump.

[0013] In a third aspect, a terminal is provided, including: A processor and a memory, wherein, The memory is used to store a computer program, The processor is used to call and run the computer program from the memory, so that the terminal executes the method of the above terminal.

[0014] In a fourth aspect, a computer storage medium is provided, and instructions are stored in the computer-readable storage medium, and when it runs on a computer, it causes the computer to execute the methods described in the above aspects.

[0015] The beneficial effects of the present invention are as follows. The pipeline internal fluid direction control system, method, terminal and storage medium provided by the present invention detect the fluid density in real time through a mass flowmeter, and use the control system to automatically judge whether the fluid is qualified, realizing the intelligent control of the fluid direction without manual intervention, greatly improving the automation level of the production process. Using the valve interlock control mechanism to ensure that the flowmeter does not accumulate mass during reflux, and only performs mass statistics when the fluid enters the finished product tank, effectively avoiding the problem of repeated statistics of the flowmeter, reducing the manual calculation error, and improving the accuracy of production data. And it stabilizes the liquid level and flow output of the temporary storage tank, optimizes the stability of the reflux process, reduces the process anomalies caused by flow fluctuations, and improves the production continuity. The present invention does not require manual operation of valves and manual correction of flow statistics data, solves the problems of relying on manual judgment and manual control in the prior art, realizes the full automation of fluid density detection, direction control and mass statistics, and significantly improves the efficiency and stability of industrial production.

[0016] In addition, the design principle of the present invention is reliable, the structure is simple, and it has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic flowchart of the method according to an embodiment of the present invention.

[0019] Figure 2 is a schematic process diagram of the method according to an embodiment of the present invention.

[0020] Figure 3 is a schematic flowchart of another method according to an embodiment of the present invention.

[0021] Figure 4 is a schematic diagram of signal transmission of the system according to an embodiment of the present invention.

[0022] Figure 5 is a schematic diagram of circuit connection of the system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] The method for controlling the fluid direction in the pipeline provided by the embodiment of the present invention is executed by a computer device. Correspondingly, the fluid direction control system in the pipeline runs in the computer device.

[0025] In some embodiments, the fluid direction control system in the pipeline may include a plurality of functional modules composed of computer program segments. The computer programs of each program segment in the fluid direction control system in the pipeline can be stored in the memory of the computer device and executed by at least one processor to perform the function of controlling the fluid direction in the pipeline.

[0026] Specifically, the fluid direction control system in the pipeline includes: A mass flowmeter, a first valve, a second valve, and a control unit; the mass flowmeter, the first valve, and the second valve are all connected to the control unit; the control unit receives the fluid parameters measured by the mass flowmeter; the mass flowmeter is connected to the first valve and the second valve through pipelines respectively; the control unit controls the opening and closing of the first valve and / or the second valve based on the fluid parameters; the first valve is arranged in the pipeline for defective products, and the second valve is arranged in the pipeline for qualified products.

[0027] Optionally, as an embodiment of the present invention, it further includes: a storage tank and a pump; a liquid level gauge is arranged in the storage tank, the storage tank is connected to the front end of the second pipeline, the rear end of the second pipeline is connected to the mass flowmeter, and a pump is arranged in the second pipeline between the storage tank and the mass flowmeter; the liquid level gauge and the pump are both connected to the control module; the liquid level gauge is used to detect the liquid level in the storage tank and control the operating frequency of the pump based on the liquid level in the storage tank.

[0028] Specifically, the power equipment involved in the fluid direction control system in the pipeline includes 2 power equipment, the evaporation stirrer E01 is controlled by direct starting, and the extraction pump E02 is controlled by frequency conversion; it includes 2 analog input signals, the liquid level LT01 of the storage tank L02, and the flow rate FT02 after the pump; 2 cut-off valves FV01 and FV02. Among them, the flowmeter FT02 can detect density, instantaneous flow rate, and cumulative mass.

[0029] Optionally, as an embodiment of the present invention, it further includes: an evaporator and a finished product tank area; the evaporator is connected to the front end of the first pipeline, and the rear end of the first pipeline is connected to the storage tank; the pipeline for defective products is connected to the evaporator; the pipeline for qualified products is connected to the finished product tank area.

[0030] Optionally, as an embodiment of the present invention, it further includes: the control module is used to receive the density of the fluid detected by the mass flowmeter: if the density is less than the preset threshold, control the first valve to open and the second valve to close, and output the density and instantaneous flow rate of the fluid detected by the mass flowmeter. If the density is greater than or equal to the preset threshold, control the first valve to close and the second valve to open, and output the density, instantaneous flow rate, and cumulative mass of the fluid detected by the mass flowmeter.

[0031] Optionally, as an embodiment of the present invention, it further includes: a human-machine interface.

[0032] The human-machine interface is connected to the control module and is used to display the density, instantaneous flow rate, and cumulative mass detected by the mass flowmeter.

[0033] Optionally, as an embodiment of the present invention, the human-machine interface further includes: used to display the liquid level of the fluid in the storage tank.

[0034] Figure 1It is a schematic flow chart of the method according to an embodiment of the present invention. Among them, Figure 1 The execution subject can be a fluid direction control system in a pipeline. According to different requirements, the order of steps in this flow chart can be changed, and some can be omitted.

[0035] For the convenience of understanding the present invention, the principle of the fluid direction control method in the pipeline of the present invention is used to further describe the fluid direction control method provided by the present invention.

[0036] Specifically, as Figure 1 shown, the fluid direction control method in the pipeline includes: S1. The fluid is stored in the evaporator for evaporation. The pump is started at a preset frequency. The fluid enters the temporary storage tank from the first evaporator and then enters the pipeline. A mass flow meter is arranged in the pipeline.

[0037] S2. The mass flow meter detects the density of the fluid: S21. If the density of the fluid is less than the preset threshold, the first valve is opened and the second valve is closed. The fluid returns to the first evaporator through the pipeline for re-evaporation, and the mass flow meter does not detect the mass of the fluid; S22. If the density of the fluid is greater than or equal to the preset threshold, the second valve is opened and the first valve is closed. The fluid enters the finished product tank area, and the mass flow meter detects the mass of the fluid.

[0038] Specifically, the fluid (such as a solution or a mixture) is stored in the evaporator. Inside the evaporator, the liquid material is heated to its boiling point by heating or steam heating for evaporation treatment to be converted into steam or gaseous material. During the evaporation of the material, the pump is started and the operating frequency of the pump is set (for example, low speed, medium speed or high speed) so that the evaporated material flows out through the pipeline. The frequency control of the pump directly affects the flow rate of the material and the transportation efficiency of the material in the pipeline. The evaporated material flows from the first evaporator into the temporary storage tank. The temporary storage tank serves as a storage area for temporarily storing the evaporated material to ensure the stability of the subsequent flow process. The material flows along the pipeline, and a mass flow meter is installed in the pipeline to continuously monitor key parameters such as the mass flow rate and density of the fluid. The mass flow meter continuously detects the density of the fluid passing through the pipeline.

[0039] When the mass flowmeter detects that the density of the material is less than the preset threshold (for example, the solvent in the material is not completely evaporated or the concentration is insufficient), the control module receives the density data from the flowmeter. Based on the density detection result, the control module sends an instruction to open the first valve and close the second valve. At this time, the flow direction of the fluid will be adjusted to flow back to the first evaporator for further evaporation. Through the reflux pipeline, the evaporated material is guided back to the evaporator to be reheated and evaporated again to increase its concentration and density. During this process, the mass flowmeter will no longer detect the mass of this fluid to avoid double-counting the mass of the reflux fluid. The reflux fluid will continue to be processed in the evaporator until its density meets the standard.

[0040] When the mass flowmeter detects that the density of the fluid is greater than or equal to the preset standard density (for example, the concentration meets the production requirements), the control module receives the signal from the flowmeter. The control module instructs to open the second valve and close the first valve at the same time, allowing the evaporated material to flow to the finished product tank area. The material is stored in the finished product tank area waiting for subsequent processing or packaging. During the process of the fluid entering the finished product tank area, the mass flowmeter will continue to detect the mass flow of the fluid to ensure that the final product meets the standards. The detection results will be used for subsequent production statistics and quality analysis.

[0041] Specifically, as Figure 2 shown, the material enters the evaporator L01 from the upper evaporation section, is further evaporated, enters the temporary storage tank L02, passes through the pump E02, through the mass flowmeter FT01 and the reflux valve FV01 (fully open state), and returns to the upper evaporation section to form a cycle. It enters the finished product tank area through the mass flowmeter FT01 and the valve FV02 leading to the finished product tank area. The mass flowmeter transmits the instantaneous flow through a 4 - 20 mA signal, and also transmits information such as density and cumulative quantity through HART communication; in addition, it can also control the output of the instantaneous flow signal and the increase of the cumulative quantity according to the presence or absence of the input digital quantity signal. When the signal indicating that the valve FV02 is fully open exists, FT01 outputs the instantaneous flow signal, otherwise it does not output. When the output fluid density is not within the qualified range, the valve FV01 opens and FV02 closes, and it returns to the front - end evaporation section, and performs PID control on the liquid level LT01 of the temporary storage tank and the frequency of the output pump E02 to ensure the stability of the liquid level of the temporary storage tank and maintain the stability of the entire system. At the same time, the density is detected using FT01; when the output fluid density is within the qualified range, the valve FV01 closes and FV02 opens, and it outputs to the finished product tank area, and performs PID control on the instantaneous flow FT01 and the frequency of the output pump E02 to stably output the finished product according to the preset output.

[0042] Optionally, as an embodiment of the present invention, it further includes: controlling the liquid level of the fluid in the temporary storage tank, including: Detect the liquid level of the fluid in the temporary storage tank: If the liquid level of the fluid in the temporary storage tank is greater than or equal to the preset first liquid level threshold, the mass flowmeter detects the instantaneous flow rate of the fluid and automatically adjusts the operating frequency of the pump. If the liquid level of the fluid in the temporary storage tank is less than the preset second liquid level threshold, wait until the liquid level of the fluid in the temporary storage tank reaches the first liquid level threshold, and then perform the detection of the instantaneous flow rate of the fluid by the mass flowmeter and the automatic adjustment of the operating frequency of the pump.

[0043] Specifically, according to production requirements, two key liquid level thresholds are set: the first liquid level threshold and the second liquid level threshold. When the liquid level is higher than this threshold, it indicates that there is enough fluid in the temporary storage tank, and the flow rate detection and automatic adjustment of the pump frequency can continue. When the liquid level is lower than this threshold, it indicates that the supply of materials is insufficient, and the system needs to suspend the automatic control. After the liquid level rises back to the safe range, the operation can continue.

[0044] When the liquid level of the fluid in the temporary storage tank is greater than or equal to the set first liquid level threshold, it indicates that the material supply in the temporary storage tank is sufficient, and subsequent processing can continue. At this time, the control module performs the following operations: The control module determines whether the liquid level meets the processing conditions by receiving the liquid level information. If the liquid level meets the threshold requirements, the mass flowmeter starts to detect the instantaneous flow rate of the fluid. The mass flowmeter analyzes the flow rate data in combination with information such as the density and volume of the material to provide a basis for subsequent control. The flow rate and density are monitored in real time to ensure the accuracy of fluid flow. According to the real-time flow rate data provided by the mass flowmeter, the control system automatically adjusts the operating frequency of the pump. This adjustment mechanism ensures that the flow rate of the pump matches the flow rate of the material in the temporary storage tank. The automatic adjustment of the pump frequency helps to maintain the stable flow of the fluid in the pipeline and prevent the phenomenon of too much or too little flow rate. When adjusting the frequency, the system can also calculate the optimal operating point of the pump through an optimization algorithm to improve energy efficiency and reduce wear. During this process, the adjustment of the pump is continuous and is fine-tuned in real time according to the needs of the fluid. If the flow rate increases, the pump frequency automatically increases; if the flow rate decreases, the pump frequency decreases to ensure the smoothness of the production process.

[0045] When the liquid level of the fluid in the temporary storage tank is lower than the set second liquid level threshold, it means that the material in the temporary storage tank is insufficient. The system will automatically take the following processing measures to ensure the stability of the fluid processing system and prevent the pump from idling or malfunctioning. After the control system receives the signal of too low liquid level, it immediately suspends the flow detection of the fluid by the mass flowmeter. At this time, the system will no longer perform automatic adjustment of the pump frequency to prevent dry running or damage of the pump caused by too low liquid level. The working state of the pump will also be suspended until the liquid level rises to the first liquid level threshold to ensure that the pump restarts with sufficient material supply. The system will enter a waiting state and continuously monitor the change of the liquid level. The liquid level gauge will feedback the liquid level data in real time, and the control module will decide when to restart the automatic control according to the change of the liquid level. Once the liquid level returns to the first liquid level threshold, the system will automatically activate the mass flowmeter and resume the pump frequency adjustment and flow detection operations. At this time, the liquid level is within the normal range and the production process can continue.

[0046] After the liquid level rises to the first liquid level threshold, the control module will restart the flow detection function of the mass flowmeter to ensure that all material flows are under control. The automatic adjustment of the pump frequency returns to the normal level, and the fluid is continuously transported according to the flow requirement. By real-time monitoring the liquid level, flow rate and the operating frequency of the pump, the system can efficiently control the energy consumption. The pump frequency adjustment mechanism not only ensures the stability of the production process, but also optimizes the energy use and reduces unnecessary power consumption.

[0047] Specifically, as Figure 3 shown, the material enters the evaporator L01 from the upper evaporation section, further evaporates, and enters the temporary storage tank L02. Set the operating frequency of the pump E02 to a HZ (the value of a is small), turn on E02, pass through the mass flowmeter FT01 and the reflux valve FV01 (fully open state), and return to the upper evaporation section. Detect the density QT01 of the fluid through FT01. If the density is less than the preset density low value L1, close FV02 and open the reflux valve FV01. At the same time, perform the automatic control of the liquid level LT01 of the temporary storage tank and the frequency of the pump E02. If the density is greater than the preset density high value H1, close FV01 and open the valve FV02 to the finished product tank area. If the liquid level value LT01 of the temporary storage tank is greater than or equal to the liquid level preset value H2, perform the automatic control of the instantaneous flow rate FT01 and the frequency of the pump E02. If the liquid level value LT01 of the temporary storage tank is less than the liquid level preset value L2, stop the automatic program and wait for the liquid level to rise to H2, and then restart the automatic execution from the beginning.

[0048] According to the flow requirements of the material, the frequency adjustment of the pump E02 can be controlled not only by the change of the liquid level, but also by the instantaneous flow rate detected by the flowmeter in real time. The system can predict the pump frequency demand in advance based on the trend of the flow rate change, and thus adjust in advance to avoid the instability caused by frequent adjustment.

[0049] Specifically, as Figure 4 shown, it includes a digital input module DI, an analog input module, an analog communication module AIHART, a digital output module DI, an analog output module AI, a control system core CPU, a network expansion switch, a human-machine interface upper computer, etc. Among them, DI is connected to the fault and operation status of devices E01 and E02, as well as the open and closed signals of valves FV01 and FV02; AI is connected to the current signals of devices E01 and E02, the frequency feedback signal of E02, and the liquid level LT01 of the temporary storage tank L02; AIHART is connected to the instantaneous mass flow, cumulative mass, temperature and other signals of the mass flowmeter FT01; DO is connected to the start, stop, fault reset and other signals of devices E01 and E02, as well as the opening, closing, fault reset and other signals of valves FV01 and FV02; AO is connected to the frequency output signal of pump E02.

[0050] Specifically, as Figure 5 shown, the control coil of valve FV02 is connected to the DO module, and the normally open signals (dry contacts) of open and closed positions are connected to the DI module. At the same time, the normally closed signal (dry contact) of the closed position is connected to the input terminal of the mass flowmeter FT01 (when the valve is opened in place, the normally closed signal is 0, and the mass flowmeter starts to measure and accumulate mass). The mass flowmeter FT01 outputs a 4-20 mA signal and is connected to the AI HART module (4-20 mA transmits the instantaneous mass flow, and HART communication transmits parameters such as cumulative mass, density, and temperature).

[0051] Therefore, the present invention can detect the fluid density in real time through the mass flowmeter, and use the control system to automatically judge whether the fluid is qualified, realizing the intelligent control of the fluid direction without manual intervention, greatly improving the automation level of the production process. By using the valve interlock control mechanism, it ensures that the flowmeter does not accumulate mass during reflux, and mass statistics are only carried out when the fluid enters the finished product tank, effectively avoiding the problem of repeated statistics of the flowmeter, reducing the manual calculation error, and improving the accuracy of production data. And it stabilizes the liquid level and flow output of the temporary storage tank, optimizes the stability of the reflux process, reduces the process abnormalities caused by flow fluctuations, and improves the production continuity. The present invention does not require manual operation of valves and manual correction of flow statistical data, solves the problems of relying on manual judgment and manual control in the prior art, realizes the full automation of fluid density detection, direction control and mass statistics, significantly improves the efficiency and stability of industrial production, and the technical effects that can be achieved by this embodiment can be seen in the above description and will not be elaborated here.

[0052] Those skilled in the art can clearly understand that the technologies in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions in the embodiments of the present invention, in essence, or the parts that contribute to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc, etc., various media that can store program codes, including several instructions to enable a computer terminal (which can be a personal computer, a server, or a second terminal, a network terminal, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0053] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. In particular, for the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the descriptions in the method embodiments.

[0054] In several embodiments provided by the present invention, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the systems or modules can be in electrical, mechanical, or other forms.

[0055] The modules described as separate components may or may not be physically separated. The components shown as modules may or may not be physical modules, that is, they can be located in one place, or they can be distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0056] In addition, in each embodiment of the present invention, the various functional modules can be integrated into a processing module, or each module can exist physically alone, or two or more modules can be integrated into one module.

[0057] Although the present invention has been described in detail by referring to the accompanying drawings and in conjunction with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and all such modifications or substitutions should fall within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily conceive of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims

1. A fluid direction control system in a pipeline, characterized in that: include: A mass flow meter, a first valve, a second valve and a control unit; The mass flow meter, the first valve and the second valve are all connected to the control unit; The control unit receives the fluid parameters measured by the mass flow meter; The mass flow meter is connected to the first valve and the second valve through the pipeline respectively; The control unit controls the opening and closing of the first valve and / or the second valve based on the fluid parameters; The first valve is arranged in the pipeline of unqualified products, and the second valve is arranged in the pipeline of qualified products.

2. The system according to claim 1, characterized in that Also includes: holding tanks and pumps; A liquid level meter is provided in the temporary storage tank, the temporary storage tank is connected to the front end of the second pipeline, the rear end of the second pipeline is connected to the mass flow meter, and a pump is provided in the second pipeline between the temporary storage tank and the mass flow meter; The liquid level meter and the pump are both connected to the control module; The liquid level meter is used to detect the liquid level in the temporary storage tank and control the operating frequency of the pump based on the liquid level in the temporary storage tank.

3. The system according to claim 2, characterized in that Also includes: Evaporator and finished product tank farms; The evaporator is connected to the front end of the first pipeline, and the rear end of the first pipeline is connected to the temporary storage tank; The unqualified product pipeline is connected to the evaporator; the qualified product pipeline is connected to the finished product tank area.

4. The system according to claim 1, characterized in that The control module is used to receive the density of the fluid detected by the mass flow meter: If the density is less than a preset threshold, the first valve is controlled to open, the second valve is controlled to close, and the density and instantaneous flow rate of the fluid detected by the mass flow meter are output; If the density is greater than or equal to the preset threshold, the first valve is controlled to close, the second valve is controlled to open, and the density, instantaneous flow rate and accumulated mass of the fluid detected by the mass flow meter are output.

5. The system according to claim 1, characterized in that Also includes: Human-computer interaction interface; The human-machine interaction interface is connected to the control module and is used to display the density, instantaneous flow rate and accumulated mass detected by the mass flow meter.

6. The system according to claim 5, characterized in that The human-computer interaction interface also includes: Used to display the liquid level of the fluid in the temporary storage tank.

7. A method for controlling the direction of fluid in a pipeline, applicable to the system according to any one of claims 1 to 6, characterized in that: include: The mass flow meter detects the density of the fluid passing through; The control unit determines the fluid density: If the fluid density is less than a preset threshold, the control unit controls the first valve to open and the second valve to close, and the fluid flows into the defective product pipeline; If the fluid density is greater than or equal to a preset threshold, the control unit controls the first valve to close and the second valve to open, and the fluid flows into the qualified product pipeline.

8. The method according to claim 7, characterized in that Also includes: Control the liquid level of the fluid in the temporary storage tank, including: Detect the liquid level of the fluid in the temporary storage tank: If the liquid level of the fluid in the temporary storage tank is greater than or equal to a preset first liquid level threshold, the mass flow meter detects the instantaneous flow rate of the fluid and automatically adjusts the operating frequency of the pump; If the liquid level of the fluid in the temporary storage tank is less than the preset second liquid level threshold, the mass flow meter detects the instantaneous flow of the fluid and automatically adjusts the operating frequency of the pump after the liquid level of the fluid in the temporary storage tank reaches the first liquid level threshold.

9. A terminal, characterized in that: include: A memory, used for storing a fluid direction control program in the pipeline; A processor is used to implement the steps of the method for controlling the direction of fluid in a pipeline as described in any one of claims 7 to 8 when executing the program for controlling the direction of fluid in the pipeline.

10. A computer-readable storage medium storing a computer program, characterized in that: The readable storage medium stores a program for controlling the direction of the fluid in a pipeline. When the program for controlling the direction of the fluid in a pipeline is executed by a processor, the steps of the method for controlling the direction of the fluid in a pipeline as described in any one of claims 7 to 8 are implemented.

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