Powder conveying control system and method

Abstract

The invention provides a powder conveying control system and method. The powder conveying control system comprises an electric control system, a powder conveying system and an upper computer control system. The upper computer control system is used for determining a control instruction and operation parameters according to target powder and target flow, sending the control instruction and the operation parameters to the electric control system and monitoring the operation state of the powder conveying system. The electric control system is used for controlling the powder conveying system to convey the target powder according to the control instruction and the operation parameters. The powder conveying system comprises a powder supplementing subsystem and a conveying subsystem. The conveying subsystem comprises a first powder bin, a weighing sensor, a powder feeding mechanism and a powder conveying mechanism. The system can determine the control instruction and the operation parameters according to the target powder and the target flow, and the electric control system can control the powder conveying system to accurately convey the target powder according to the control instruction and the operation parameters. In this way, accurate conveying of the powder can be achieved according to the target flow, and therefore the accuracy of powder conveying is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder conveying, and in particular to a powder conveying control system and method. Background Art

[0002] With the large-scale development of unconventional oil and gas reservoirs, large-scale volume fracturing technology, which aims to increase the transformation volume and increase the complexity of fractures, has become a key technology for the exploitation of unconventional oil and gas reservoirs (such as shale oil and gas, etc.). Among them, commonly used fracturing fluids include: slippery water and glue (mainly slippery water). The current conventional practice is to set up a dedicated glue storage area at the well site, and then use the matching conveying device to transport the pre-prepared glue to the sand mixing truck for mixing. In this way, it is necessary to occupy the area of ​​the well site, and a large amount of glue mainly composed of water needs to be transported. Not only does it increase costs, but it also affects the mining efficiency.

[0003] Therefore, liquid and powder (e.g., oil-based fracturing proppant, polymer drag reducer, etc.) can be mixed by online preparation equipment at the well site to prepare the required mixed preparation. In this way, the mixed preparation does not need to be transported again and can be used after mixing at the well site.

[0004] However, due to the influence of the well site environment and other factors, it is impossible to ensure that the powder is delivered at the target flow rate in real time and accurately, which will lead to the inability to accurately prepare the mixed preparation with the target ratio, seriously affecting the oil extraction construction. Summary of the invention

[0005] The technical problem to be solved by the present invention is the problem that powder cannot be accurately transported.

[0006] In order to solve the above technical problems, the present invention provides a powder conveying control system and method, which specifically adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a powder conveying control system, comprising: an electric control system, a powder conveying system and a host computer control system. The electric control system is connected to the powder conveying system, and the host computer control system is connected to the electric control system and the powder conveying system. The host computer control system is used to determine control instructions and operating parameters according to target powder and target flow, and send control instructions and operating parameters to the electric control system, as well as monitor the operating status of the powder conveying system. The electric control system is used to control the powder conveying system to convey the target powder according to the control instructions and operating parameters. The powder conveying system comprises: a powder replenishing subsystem and a conveying subsystem, the powder replenishing subsystem is connected to the conveying subsystem; the powder replenishing subsystem is used to replenish the target powder to the conveying subsystem; the conveying subsystem comprises: a first powder silo, a weighing sensor, a powder feeding mechanism and a powder conveying mechanism; the powder feeding mechanism is arranged at the bottom of the first powder silo, and the powder conveying mechanism is arranged at the bottom of the powder feeding mechanism. The first powder silo is used to store target powder; the weighing sensor is used to collect the weight of the target powder in the first powder silo; the powder feeding mechanism is used to fill the target powder into the powder conveying mechanism at a first operating speed; the powder conveying mechanism is used to convey the target powder at a second operating speed, and the first operating speed and the second operating speed are included in the operating parameters.

[0008] The powder conveying control system adopts industrial Ethernet, computer technology and automatic control technology, has a self-tuning function, and can dynamically and statically control the powder conveying process according to actual conditions, so as to realize the efficient operation of the powder conveying control system. Specifically, the upper computer control system can determine the control instructions and operating parameters according to the target powder and target flow rate, and the electronic control system can control the powder conveying system to accurately convey the target powder according to the control instructions and operating parameters. In addition, the powder conveying control system can also adapt to the conveying of different types of powders, and can realize the accurate conveying of powder according to the target flow rate, thereby improving the accuracy of powder conveying.

[0009] In combination with the first aspect, in an optional implementation, the host computer control system includes: a historical operation database. In determining the control instructions and operation parameters according to the target powder and the target flow rate, the host computer control system is specifically used to: determine whether there is a flow-speed relationship and PID parameters corresponding to the target powder in the historical operation database. In the case that the flow-speed conversion relationship and PID parameters corresponding to the target powder exist in the historical operation database, the first operation speed and the second operation speed are determined according to the target flow and the flow-speed conversion relationship, and the first operation speed, the second operation speed and the PID parameters are used as operation parameters. In the case that the flow-speed conversion relationship and PID parameters corresponding to the target powder do not exist in the historical operation database, the flow-speed conversion relationship and PID parameters are determined according to the test data of the target powder, the first operation speed and the second operation speed are determined according to the target flow and the flow-speed conversion relationship, and the flow-speed conversion relationship and the PID parameters are stored in the historical operation database.

[0010] In combination with the first aspect, in an optional implementation, the above-mentioned operating parameters also include: PID setting parameters. Then the host computer control system is further used to: perform PID setting according to the target flow rate to obtain the PID setting parameters.

[0011] In combination with the first aspect, in an optional implementation, the host computer control system is also used to: monitor the powder storage amount of the target powder in the first powder silo. When the powder storage amount is less than the powder storage threshold, output a powder replenishment instruction so that the electronic control system controls the powder replenishment subsystem to replenish the target powder to the first powder silo in response to the powder replenishment instruction. In the process of the powder replenishment subsystem replenishing the target powder to the first powder silo, monitor the monitoring flow of the target powder transported by the powder conveying system. When the flow difference between the monitoring flow and the target flow is greater than the first difference threshold, adjust the second operating speed according to the monitoring flow to reduce the flow difference.

[0012] In combination with the first aspect, in an optional implementation, the host computer control system is further used to: first, monitor the monitoring flow rate of the target powder transported by the powder conveying system. Then, when the flow difference between the monitoring flow rate and the target flow rate is continuously greater than the second difference threshold for a time greater than the warning time threshold, output a warning instruction to indicate that an abnormal situation exists.

[0013] In combination with the first aspect, in an optional implementation, the conveying subsystem further includes: a powder arch breaking mechanism. The powder arch breaking mechanism is arranged on the first powder bin, and the powder arch breaking mechanism is used to vibrate the first powder bin at a first vibration frequency. The upper computer control system is also used to: first, monitor the powder monitoring weight of the target powder in the first powder bin. Then, determine the first vibration frequency according to the powder monitoring weight and the preset weight-frequency conversion relationship.

[0014] In combination with the first aspect, in an optional implementation, the powder replenishment subsystem includes: a second powder silo, a powder conveying motor, a material level detection switch, a powder discharge valve, a powder flow sensor, and a discharge valve switch state feedback signal device. The second powder silo is connected to the first powder silo through an upper powder pipeline, and the powder flow sensor is arranged on the upper powder pipeline. Among them, the second powder silo is used to store the target powder; the powder discharge valve is used to load and unload the target powder in the second powder silo; the powder conveying motor is used to control the replenishment of the target powder in the second powder silo to the first powder silo; the powder flow sensor is used to obtain the flow rate of the target powder replenished to the first powder silo; the material level detection switch is used to control the opening or closing of the material level value of the second powder silo; the discharge valve switch state feedback signal device is used to indicate the open state or closed state of the powder discharge valve.

[0015] In combination with the first aspect, in an optional implementation, the powder replenishment subsystem includes: a second powder bin, a third powder bin, a powder conveying pipeline, an air suction pipe, an air suction motor, a powder replenishment conveying mechanism, a material level detection switch, and a powder flow sensor. The second powder bin is connected to the first powder bin through an upper powder pipeline, the powder flow sensor is arranged on the upper powder pipeline, the third powder bin is connected to the second powder bin through a powder conveying pipeline, the powder replenishment conveying mechanism is arranged at the bottom of the second powder bin and the upper powder pipeline, one end of the air suction pipe is connected to the second powder bin, and the other end of the air suction pipe is connected to the air suction motor. The second powder bin and the third powder bin are used to store target powder, the powder replenishment conveying mechanism is used to control the replenishment of the target powder in the second powder bin to the first powder bin, the powder flow sensor is used to obtain the flow of the target powder replenished to the first powder bin, the material level detection switch is used to control the opening or closing of the material level value of the second powder bin, and the air suction pipe and the air suction motor are used to form a negative pressure environment in the second powder bin to convey the target powder from the third powder bin to the second powder bin through the powder conveying pipeline.

[0016] In combination with the first aspect, in an optional implementation, the host computer control system is also used to: first, generate a flow-time curve based on the monitored flow, the flow-time curve is used to characterize the relationship between the conveying time and the monitored flow of the target powder; then, display and save the flow-time curve.

[0017] In combination with the first aspect, in an optional implementation, the host computer control system further includes: a formula database. The host computer control system is also used to: determine formula information corresponding to the target powder through the formula database according to the target powder, and the ingredients in the formula information include the target powder. Then, the formula information is output.

[0018] In a second aspect, the present invention provides a powder conveying control method, which can be applied to a powder conveying control system. The powder conveying control system includes an electronic control system, a powder conveying system, and a host computer control system. The method includes: first, determining control instructions and operating parameters according to target powder and target flow through the host computer control system, sending control instructions and operating parameters to the electronic control system, and monitoring the operating state of the powder conveying system. Then, the powder conveying system is controlled by the electronic control system to convey the target powder according to the control instructions and operating parameters. The control instructions and operating parameters are determined according to the target powder and target flow through the host computer control system, including: determining whether there is a flow-speed relationship and PID parameters corresponding to the target powder in the historical operation database. In the case that there is a flow-speed conversion relationship and PID parameters corresponding to the target powder in the historical operation database, the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the first operating speed, the second operating speed and the PID parameters are used as operating parameters, wherein the first operating speed is the speed at which the powder feeding mechanism fills the target powder into the powder conveying mechanism, and the second operating speed is the speed at which the powder conveying mechanism conveys the target powder. When there is no flow-speed conversion relationship and PID parameters corresponding to the target powder in the historical operation database, the flow-speed conversion relationship and PID parameters are determined according to the test data of the target powder, and the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the flow-speed conversion relationship and PID parameters are stored in the historical operation database.

[0019] It can be understood that the beneficial effects that can be achieved by the powder conveying control method provided in the second aspect can refer to the beneficial effects in the first aspect and any possible design thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a powder conveying control system provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a powder conveying control system provided by an embodiment of the present invention;

[0022] Figure 3 A schematic structural diagram of another powder replenishing subsystem provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a display interface of a host computer control system provided by an embodiment of the present invention;

[0024] Figure 5 A schematic flow chart of a powder conveying control method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0026] With the large-scale development of unconventional oil and gas reservoirs, large-scale volume fracturing technology, which aims to increase the transformation volume and increase the complexity of fractures, has become a key technology for the exploitation of unconventional oil and gas reservoirs (such as shale oil and gas, etc.). Among them, commonly used fracturing fluids include: slippery water and glue (mainly slippery water). The current conventional practice is to set up a dedicated glue storage area at the well site, and then use the matching conveying device to transport the pre-prepared glue to the sand mixing truck for mixing. In this way, it is necessary to occupy the area of ​​the well site, and a large amount of glue mainly composed of water needs to be transported. Not only does it increase costs, but it also affects the mining efficiency.

[0027] Therefore, liquid and powder (e.g., oil-based fracturing proppant, polymer drag reducer, etc.) can be mixed by online preparation equipment at the well site to prepare the required mixed preparation. In this way, the mixed preparation does not need to be transported again and can be used after mixing at the well site.

[0028] However, due to the influence of the well site environment and other factors, it is impossible to ensure that the powder is delivered at the target flow rate in real time and accurately, which will lead to the inability to accurately prepare the mixed preparation with the target ratio, seriously affecting the oil extraction construction.

[0029] In order to solve the above problems, the embodiment of the present application provides a powder conveying control system and method, which adopts industrial Ethernet, computer technology and automatic control technology, has a self-tuning function, can dynamically control and statically control the powder conveying process according to actual conditions, and can realize the efficient operation of the powder conveying control system. The powder conveying control system can adapt to the conveying of different types of powders, and can realize the precise conveying of powders according to the target flow rate, thereby improving the accuracy of powder conveying.

[0030] The solution provided by the embodiment of the present application is introduced below in conjunction with the accompanying drawings.

[0031] For details, see Figure 1 , is a schematic diagram of the structure of the powder conveying control system provided by an embodiment of the present invention, such as Figure 1As shown, a powder conveying control system 10 provided by the present invention comprises: an electric control system 100, a powder conveying system 200 and a host computer control system 300. The electric control system 100 is connected to the powder conveying system 200, and the host computer control system 300 is connected to the electric control system 100 and the powder conveying system 200.

[0032] Specifically, the host computer control system 300 is used to determine control instructions and operating parameters according to the target powder and the target flow rate, send the control instructions and operating parameters to the electronic control system 100 , and monitor the operating status of the powder conveying system 200 .

[0033] In one implementation, the host control system 300 can be designed based on a C / S architecture, can be written in C#, and developed through Visual Studio 2022. The UI framework can use Windows Forms, based on the .NET Framework platform, and use a SQL Server database. The host control system 300 can also use the S7netp l us communication library to read and write data with the PLC, so as to monitor the operating status of the powder conveying system 200 and send control instructions and operating parameters.

[0034] In some embodiments, the host computer control system 300 can display the equipment operating status of the powder conveying system 200 and the electric control system 100 through the equipment control interface, so that the operator can monitor the equipment operating status in real time. Through the display view of the equipment control interface, the operator can conveniently and intuitively view the current operating parameters and status of the equipment in the electric control system and the powder conveying system. In addition, by regularly checking the equipment control interface, it can be ensured that the equipment in the electric control system and the powder conveying system is operating normally without abnormal conditions.

[0035] In some embodiments, the host computer control system 300 can also realize the equipment alarm function. Specifically, when the equipment in the electric control system and the powder conveying system fails or is abnormal, the host computer control system 300 can output the equipment alarm signal through the equipment control interface. Furthermore, the alarm record interface can also be displayed through the equipment control interface to display more detailed alarm information, so that the operator can perform corresponding processing according to the alarm information. In addition, after the alarm is released, the host computer control system 300 can also reset the selected alarm record to release the alarm signal.

[0036] The electric control system 100 can be used to control the powder conveying system 200 to convey target powder according to control instructions and operating parameters. The target powder is the powder to be conveyed, such as: petroleum formulation fracturing proppant, polymer drag reducer, etc.

[0037] In one implementation, Figure 2 A schematic diagram of the structure of a powder conveying control system provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the electric control system 100 may include: an electric control cabinet 101, an operating platform 102 and connecting wires. Among them, the electric control cabinet 101 may include: a high-precision controller, a communication component, a motion control component, a signal acquisition module, an analog and digital control signal module, a power module, a circuit breaker, a contactor, a relay, an emergency stop button, an operating key, a display instrument, etc. The operating platform 102 may be composed of an industrial control all-in-one computer, including: a start / stop button, an emergency stop button, an alarm reset operating key, etc. The connecting wires may include: a power supply cable, a connecting wire between the main control cabinet and the operating platform, a communication cable, etc.

[0038] Continue to see Figure 1 The powder conveying system 200 may include: a powder replenishing subsystem 210 and a conveying subsystem 220 , wherein the powder replenishing subsystem 210 is connected to the conveying subsystem 220 ; the powder replenishing subsystem 210 is used to replenish the target powder to the conveying subsystem 220 .

[0039] Specifically, Figure 2 As shown, the powder replenishing subsystem 210 and the conveying subsystem 220 are both connected to the electric control cabinet 101. The conveying subsystem 220 includes: a first powder bin 221, a weighing sensor 222, a powder feeding mechanism 223 and a powder conveying mechanism 224; the powder feeding mechanism 223 is arranged at the bottom of the first powder bin 221, and the powder conveying mechanism 224 is arranged at the bottom of the powder feeding mechanism 223.

[0040] The first powder bin 221 is used to store the target powder; the weighing sensor 222 is used to collect the weight of the target powder in the first powder bin 221, and the weight can be used to adjust the speed of conveying the target powder. The powder feeding mechanism 223 is used to fill the target powder into the powder conveying mechanism 224 at a first operating speed. The powder conveying mechanism 224 is used to convey the target powder at a second operating speed, and the first operating speed and the second operating speed are included in the operating parameters.

[0041] Exemplarily, the powder conveying mechanism 224 may include a screw conveying device, and the powder conveying mechanism 224 may convey the target powder to the mixing system to be mixed with the target liquid through the mixing system to prepare the target mixed liquid.

[0042] In some embodiments, the host control system 300 can manage various data generated during the powder conveying process in a project management manner. In addition, various data tables required for the project can be created based on the project information determined by the user (such as target powder and target flow), and the production-related data can be uniformly stored in the database in a project classification manner. The host control system 300 can obtain the target powder conveying flow data, operation mode, and target powder information to determine the corresponding powder conveying mode and operation status in executing multiple execution tasks.

[0043] In some embodiments, the host control system 300 may include: a historical operation database. The historical operation database stores the operation parameters of the conveyed powder, etc. In determining the control instructions and operation parameters according to the target powder and the target flow rate, the host control system 300 is specifically used to:

[0044] Determine whether the flow-velocity relationship and PID parameters corresponding to the target powder exist in the historical operation database.

[0045] When there is a flow-speed conversion relationship and PID parameters corresponding to the target powder in the historical operation database, the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the first operating speed, the second operating speed and the PID parameters are used as operating parameters.

[0046] When there is no flow-speed conversion relationship and PID parameters corresponding to the target powder in the historical operation database, the flow-speed conversion relationship and PID parameters are determined according to the test data of the target powder, and the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the flow-speed conversion relationship and PID parameters are stored in the historical operation database.

[0047] In some embodiments, the powder conveying control system provided by the embodiments of the present invention can realize three working modes: self-tuning mode, automatic conveying mode, and constant speed conveying mode. Among them, the host computer control system 300 can perform PID tuning according to the target flow rate in the self-tuning mode, obtain PID parameters and write them into the controller.

[0048] Specifically, in some embodiments, the above operating parameters also include: PID setting parameters. Then the host computer control system 300 is further used to: perform PID setting according to the target flow rate to obtain the PID setting parameters.

[0049] In some embodiments, the host control system 300 can adjust the speed of conveying the target powder according to the feedback value of the sensor (e.g., the weighing sensor 222) in the automatic conveying mode, so as to achieve accurate conveying. Then, the host control system 300 is also used to: first, monitor the powder storage amount of the target powder in the first powder bin 221. The powder storage amount can be obtained by the weighing sensor 222. Then, when the powder storage amount is less than the powder storage threshold, output a powder replenishment instruction so that the electronic control system 100 controls the powder replenishment subsystem 210 to replenish the target powder to the first powder bin 221 in response to the powder replenishment instruction. Further, in the process of the powder replenishment subsystem 210 replenishing the target powder to the first powder bin 221, the monitoring flow of the target powder conveying system 200 is monitored. The monitoring flow can be obtained by obtaining the weight and monitoring time of the target powder according to the weighing sensor 222, and is calculated in combination with the flow measurement value of the powder flow sensor. Specifically, the monitoring flow is equal to the ratio of the weight difference of the target powder at the last measurement time and the current measurement time to the time interval plus the flow measurement value of the powder flow sensor at the current measurement time. That is, the expression for monitoring flow is:

[0050]

[0051] in, Indicates t 1 Time to t 0 Monitoring flow at the moment, m 1 Indicates t 1 The weighing sensor gets the weight of the target powder at any given moment, m 0 Indicates t 0 The weighing sensor obtains the weight of the target powder at the moment, v 1 Indicates t 1 The flow measurement value collected by the powder flow sensor at this moment.

[0052] Then, when the flow difference between the monitored flow and the target flow is greater than the first difference threshold, the host computer control system 300 adjusts the second operating speed according to the monitored flow to reduce the flow difference.

[0053] Finally, when the powder storage amount is greater than the powder replenishment stop threshold, the host control system 300 outputs a powder replenishment stop instruction, so that the electronic control system 100 responds to the powder replenishment stop instruction to shut down the powder replenishment subsystem 210 to stop replenishing the target powder to the first powder bin 221 .

[0054] Specifically, the host computer control system 300 can determine the second operating speed according to the target flow rate through the flow-speed conversion relationship so that the target powder conveying accuracy meets the design and production requirements. During the target powder conveying process, the powder storage amount of the target powder in the first powder bin 221 is monitored in real time. When the powder storage amount is less than the powder storage threshold, the powder replenishment instruction is output. That is, when the powder storage amount triggers the powder replenishment instruction, the powder replenishment subsystem 210 can automatically replenish powder. During the powder replenishment process, the powder conveying system 200 monitors the monitored flow rate of the target powder conveyed by the powder flow. When the flow difference between the monitored flow rate and the target flow rate is greater than the first difference threshold, that is, when the monitored flow rate exceeds the target range, the second operating speed is adjusted to ensure the accuracy of conveying the target powder. Further, when the powder replenishment is completed, that is, when the powder replenishment signal appears, the powder replenishment is stopped and switched to the PID real-time dynamic adjustment stage to achieve accurate powder transportation.

[0055] In some embodiments, the host control system 300 can determine the second operating speed for powder conveying through the flow-speed conversion relationship under constant speed conveying.

[0056] Specifically, the host control system 300 can determine the second operating speed according to the target flow rate through the flow-speed conversion relationship. The powder conveying mechanism 224 performs a fixed speed closed-loop control at the second operating speed to convey the target powder at the calculated speed.

[0057] In some embodiments, during the operation of conveying the target powder, the conveying flow rate of the powder can also be monitored in real time. When the conveying flow rate exceeds the set value at consecutive points, an alarm output is issued to prompt the operator to intervene in the operation and conduct inspections.

[0058] Specifically, in some embodiments, the host computer control system 300 is further used to: monitor the monitoring flow rate of the target powder transported by the powder conveying system 200. When the flow difference between the monitoring flow rate and the target flow rate is continuously greater than the second difference threshold value for a time greater than the warning time threshold value, output a warning instruction to indicate that an abnormal situation exists.

[0059] In some embodiments, see Figure 2 In order to prevent the target powder in the first powder bin 221 from bridging, the conveying subsystem 220 further includes: a powder arch breaking mechanism 225, which is arranged on the first powder bin 221 and is used to vibrate the first powder bin 221 at a first vibration frequency. The host computer control system 300 is further used to: monitor the powder monitoring weight of the target powder in the first powder bin 221. Then, the first vibration frequency is determined according to the powder monitoring weight and the preset weight-frequency conversion relationship.

[0060] In some embodiments, the powder replenishment subsystem 210 may be a positive pressure powder replenishment system. Figure 2 The powder replenishing subsystem 210 may include: a second powder bin 211, a powder conveying motor 212, a material level detection switch 213, a powder discharge valve 214, a powder flow sensor 215, and a discharge valve switch state feedback signal device 216. The second powder bin 211 is connected to the first powder bin 221 through an upper powder pipeline 217, and the powder flow sensor 215 is arranged on the upper powder pipeline 217.

[0061] Specifically, the second powder bin 211 is used to store the target powder. The powder discharge valve 214 is used to load and unload the target powder in the second powder bin 211. The powder conveying motor 212 is used to control the target powder in the second powder bin 211 to be replenished to the first powder bin 221. The powder flow sensor 215 is used to obtain the flow rate of the target powder replenished to the first powder bin 221. The material level detection switch 213 is used to control the opening or closing of the material level value of the second powder bin 211. The discharge valve switch state feedback signal device 216 is used to indicate the opening state or closing state of the powder discharge valve 214.

[0062] The powder replenishing subsystem 210 can replenish the target powder in the second powder bin 211 into the first powder bin 221 by means of pneumatic conveying through the powder conveying motor 212 to achieve rapid conveying.

[0063] In some embodiments, the powder replenishing subsystem 210 may also be a negative pressure powder replenishing system. Figure 3 A schematic diagram of the structure of another powder replenishing subsystem provided in an embodiment of the present invention is shown in FIG. Figure 3 As shown, the powder replenishment subsystem 210 may include: a second powder bin 211, a third powder bin 218, a powder conveying pipeline 219, an air suction pipe 21A, an air suction motor 21B, a powder replenishment conveying mechanism 21C, a material level detection switch 213 and a powder flow sensor 215.

[0064] The second powder bin 211 is connected to the first powder bin 221 through an upper powder pipeline 217, and a powder flow sensor 215 is arranged on the upper powder pipeline 217. The third powder bin 218 is connected to the second powder bin 211 through a powder conveying pipeline 219. The powder replenishing conveying mechanism 21C is arranged at the bottom of the second powder bin 211 and connected to the upper powder pipeline 217. One end of the suction pipe 21A is connected to the second powder bin 211, and the other end of the suction pipe 21A is connected to the suction motor 21B.

[0065] Specifically, the second powder bin 211 and the third powder bin 218 are used to store target powder. The powder replenishing conveying mechanism 21C is used to control the replenishment of the target powder in the second powder bin 211 to the first powder bin 221. The powder flow sensor 215 is used to obtain the flow of the target powder replenished to the first powder bin 221. The material level detection switch 213 is used to control the opening or closing of the material level value of the second powder bin 211. The suction pipe 21A and the suction motor 21B are used to form a negative pressure environment in the second powder bin 211, so as to convey the target powder from the third powder bin 218 to the second powder bin 211 through the powder conveying pipeline 219.

[0066] In some embodiments, the host computer control system 300 is further used to: first, generate a flow-time curve according to the monitored flow, the flow-time curve is used to characterize the relationship between the conveying time and the monitored flow of the target powder, and then display and save the flow-time curve.

[0067] For example, Figure 4 A schematic diagram of a display interface of a host computer control system provided by an embodiment of the present invention, such as Figure 4 As shown, in the display interface of the host control system, the flow-time curve can be displayed through the display window 401.

[0068] In this way, by displaying the flow-time curve, the operator can view the real-time situation of powder conveying during the operation of the equipment. By observing the displayed flow-time curve, the operator can more intuitively understand the overall trend and changes of powder conveying. And according to the real-time curve data, adjust the operating parameters to improve the operating efficiency and stability of the system.

[0069] In some embodiments, the host computer control system 300 also has a function of formula generation. Specifically, the host computer control system 300 also includes: a formula database. The host computer control system 300 is also used to: first, determine the formula information corresponding to the target powder through the formula database according to the target powder, and the ingredients in the formula information include the target powder. Then, output the formula information. In this way, the convenience and accuracy of subsequent mixing of the target powder can be improved.

[0070] The powder conveying control system provided by the embodiment of the present invention adopts industrial Ethernet, computer technology and automatic control technology, has a self-tuning function, and can dynamically control and statically control the powder conveying process according to actual conditions, so as to realize the efficient operation of the powder conveying control system. The upper computer control system can determine the control instructions and operating parameters according to the target powder and the target flow rate, and the electric control system can control the powder conveying system to accurately convey the target powder according to the control instructions and the operating parameters. The powder conveying control system can also adapt to the conveying of different types of powders, and can realize the accurate conveying of powder according to the target flow rate, thereby improving the accuracy of powder conveying.

[0071] In some embodiments, the host control system may use a high-precision controller PLC, and may control distributed I / O, and regulate the motors and valves of the powder conveying system and the host control system.

[0072] In some embodiments, the powder conveying control system further includes a communication component, so that the communication between the controller, servo drive, frequency converter, data acquisition module, analog and digital control signal module can be realized. In one implementation, digital communication transmission can be adopted, so as to reduce the risk of electromagnetic interference.

[0073] The powder conveying control system also includes a signal acquisition module, which can realize the acquisition of various sensor signals such as weighing sensors, powder flow sensors, etc. The acquisition module can adopt signal isolation technology, thereby improving the electromagnetic compatibility and signal stability of the powder conveying control system.

[0074] The powder conveying control system also includes analog and digital control signal modules, which can realize the control of the vibration frequency, the first operating speed and the second operating speed of the powder arch breaking mechanism, and the control of the start and stop of the powder arch breaking mechanism, the powder feeding mechanism, the powder conveying mechanism, the powder replenishing subsystem, etc. The analog and digital control signal modules can use signal isolation, signal separation and good grounding technology to ensure effective signal transmission.

[0075] The powder conveying control system can also realize multiple interlock protections. Specifically, multiple interlock protections can be set during the target powder conveying process. After the abnormal conveying signal is found, the target powder conveying can be stopped in time to ensure the safety of the subsequent process. In addition, the powder conveying control system also reserves communication and hardware interfaces to facilitate the hardware and software interlocking with external devices.

[0076] The powder conveying control system also has electromagnetic compatibility. Through system grounding and secondary grounding, network communication can replace traditional signal transmission to enhance the system's anti-interference ability.

[0077] The present invention also provides a powder conveying control method, which can be applied to Figure 1 The powder conveying control system shown includes: an electronic control system, a powder conveying system and a host computer control system.

[0078] Figure 5 A schematic diagram of a powder conveying control method provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the method includes the following steps S101-S102:

[0079] S101, determining control instructions and operating parameters according to target powder and target flow rate through the host computer control system, sending control instructions and operating parameters to the electronic control system, and monitoring the operating status of the powder conveying system.

[0080] Specifically, S101 may include: first, determining whether there is a flow-speed relationship and PID parameters corresponding to the target powder in the historical operation database.

[0081] Then, when there is a flow-speed conversion relationship and PID parameters corresponding to the target powder in the historical operation database, the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the first operating speed, the second operating speed and the PID parameters are used as operating parameters, wherein the first operating speed is the speed at which the powder feeding mechanism fills the target powder into the powder conveying mechanism, and the second operating speed is the speed at which the powder conveying mechanism conveys the target powder.

[0082] When there is no flow-speed conversion relationship and PID parameters corresponding to the target powder in the historical operation database, the flow-speed conversion relationship and PID parameters are determined according to the test data of the target powder, and the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the flow-speed conversion relationship and PID parameters are stored in the historical operation database.

[0083] S102, controlling the powder conveying system to convey target powder according to control instructions and operating parameters through the electronic control system.

[0084] By adopting the powder conveying control method provided in the embodiment of the present invention, the upper computer control system can determine the control instructions and operating parameters according to the target powder and the target flow rate, and the electric control system can control the powder conveying system to accurately convey the target powder according to the control instructions and the operating parameters. The powder conveying control system can also adapt to the conveying of different types of powders, and can realize the precise conveying of powder according to the target flow rate, thereby improving the accuracy of powder conveying.

[0085] An embodiment of the present invention further provides an electronic device, which may include: a display screen, a memory, and one or more processors. The display screen, the memory, and the processor are coupled. The memory is used to store computer program code, and the computer program code includes computer instructions. When the processor executes the computer instructions, the electronic device can execute the various methods or steps executed in the above-mentioned powder conveying control method embodiment. Of course, the electronic device includes but is not limited to the above-mentioned display screen, the memory, and one or more processors.

[0086] The embodiment of the present invention further provides a computer-readable storage medium for storing computer instructions for executing the above-mentioned powder conveying control method.

[0087] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0088] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A powder conveying control system, characterized in that: include: Electronic control system, powder conveying system and host computer control system; The electric control system is connected to the powder conveying system, and the host computer control system is connected to the electric control system and the powder conveying system; The host computer control system is used to determine control instructions and operating parameters according to the target powder and target flow rate, send the control instructions and operating parameters to the electronic control system, and monitor the operating status of the powder conveying system; The electronic control system is used to control the powder conveying system to convey the target powder according to the control instruction and the operating parameters; The powder conveying system comprises: a powder replenishing subsystem and a conveying subsystem, wherein the powder replenishing subsystem is connected to the conveying subsystem; the powder replenishing subsystem is used to replenish the target powder to the conveying subsystem; Wherein, the conveying subsystem includes: a first powder silo, a weighing sensor, a powder feeding mechanism and a powder conveying mechanism; the powder feeding mechanism is arranged at the bottom of the first powder silo, and the powder conveying mechanism is arranged at the bottom of the powder feeding mechanism; The first powder silo is used to store the target powder; the weighing sensor is used to collect the weight of the target powder in the first powder silo; the powder feeding mechanism is used to fill the target powder into the powder conveying mechanism at a first operating speed; the powder conveying mechanism is used to convey the target powder at a second operating speed, and the first operating speed and the second operating speed are included in the operating parameters.

2. The system according to claim 1, characterized in that The host computer control system includes: a historical operation database; In determining the control instructions and operating parameters according to the target powder and the target flow rate, the host computer control system is specifically used for: Determine whether there is a flow-speed relationship and PID parameters corresponding to the target powder in the historical operation database; When there is a flow-speed conversion relationship and a PID parameter corresponding to the target powder in the historical operation database, the first operation speed and the second operation speed are determined according to the target flow and the flow-speed conversion relationship, and the first operation speed, the second operation speed and the PID parameter are used as the operation parameters; When the flow-speed conversion relationship and the PID parameters corresponding to the target powder do not exist in the historical operation database, the flow-speed conversion relationship and the PID parameters are determined according to the test data of the target powder, the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the flow-speed conversion relationship and the PID parameters are stored in the historical operation database.

3. The system according to claim 1, characterized in that The operating parameters also include: PID setting parameters; the host computer control system is also used for: PID tuning is performed according to the target flow rate to obtain the PID tuning parameters.

4. The system according to claim 1, characterized in that The host computer control system is also used for: Monitoring the amount of target powder stored in the first powder bin; When the powder storage amount is less than the powder storage threshold, a powder replenishment instruction is output, so that the electronic control system controls the powder replenishment subsystem to replenish the target powder to the first powder bin in response to the powder replenishment instruction; During the process of the powder replenishing subsystem replenishing the target powder to the first powder bin, monitoring the monitoring flow rate of the target powder transported by the powder conveying system; When a flow difference between the monitored flow and the target flow is greater than a first difference threshold, the second operating speed is adjusted according to the monitored flow to reduce the flow difference.

5. The system according to any one of claims 1 to 4, characterized in that: The host computer control system is also used for: Monitoring the flow rate of the target powder being transported by the powder transport system; When the flow difference between the monitored flow and the target flow is continuously greater than the second difference threshold for a period greater than the warning time threshold, a warning instruction is output to indicate the presence of an abnormal situation.

6. The system according to claim 1, characterized in that The conveying subsystem further includes: a powder arch breaking mechanism, which is disposed on the first powder bin and is used to vibrate the first powder bin at a first vibration frequency; the host computer control system is also used to: Monitoring the powder monitoring weight of the target powder in the first powder bin; The first vibration frequency is determined according to the powder monitoring weight and a preset weight-frequency conversion relationship.

7. The system according to claim 1, characterized in that The powder replenishment subsystem includes: a second powder silo, a powder conveying motor, a material level detection switch, a powder discharge valve, a powder flow sensor, and a discharge valve switch state feedback signal device; the second powder silo is connected to the first powder silo through a powder supply pipeline, and the powder flow sensor is arranged on the powder supply pipeline; Among them, the second powder silo is used to store the target powder; the powder unloading valve is used to load and unload the target powder in the second powder silo; the powder conveying motor is used to control the target powder in the second powder silo to be replenished to the first powder silo; the powder flow sensor is used to obtain the flow rate of the target powder replenished to the first powder silo; the material level detection switch is used to control the opening or closing of the material level value of the second powder silo; the unloading valve switch state feedback signal device is used to indicate the opening state or closing state of the powder unloading valve.

8. The system according to claim 1, characterized in that The powder replenishment subsystem includes: a second powder bin, a third powder bin, a powder conveying pipeline, an air suction pipe, an air suction motor, a powder replenishment conveying mechanism, a material level detection switch and a powder flow sensor; The second powder bin is connected to the first powder bin through an upper powder pipeline, the powder flow sensor is arranged on the upper powder pipeline, the third powder bin is connected to the second powder bin through the powder conveying pipeline, the powder replenishing conveying mechanism is arranged at the bottom of the second powder bin and the upper powder pipeline, one end of the suction pipe is connected to the second powder bin, and the other end of the suction pipe is connected to the suction motor; The second powder silo and the third powder silo are used to store the target powder, the powder replenishing conveying mechanism is used to control the replenishment of the target powder in the second powder silo to the first powder silo, the powder flow sensor is used to obtain the flow of the target powder replenished to the first powder silo, the material level detection switch is used to control the opening or closing of the detection of the material level value of the second powder silo, and the suction pipe and the suction motor are used to form a negative pressure environment in the second powder silo to convey the target powder from the third powder silo to the second powder silo through the powder conveying pipeline.

9. The system according to claim 5, characterized in that The host computer control system is also used for: generating a flow-time curve according to the monitored flow, wherein the flow-time curve is used to characterize the relationship between the conveying time and the monitored flow of the target powder; The flow-time curve is displayed and saved.

10. A powder conveying control method, characterized in that: Applied to a powder conveying control system, the powder conveying control system comprises: an electric control system, a powder conveying system and a host computer control system; the method comprises: Determine control instructions and operating parameters according to target powder and target flow rate through the host computer control system, send the control instructions and operating parameters to the electronic control system, and monitor the operating status of the powder conveying system; Controlling the powder conveying system to convey the target powder according to the control instruction and the operating parameters by the electronic control system; Wherein, the control instructions and operating parameters are determined by the host computer control system according to the target powder and the target flow rate, including: Determine whether there is a flow-speed relationship and PID parameters corresponding to the target powder in the historical operation database; In a case where the flow-speed conversion relationship and the PID parameters corresponding to the target powder exist in the historical operation database, a first operation speed and a second operation speed are determined according to the target flow and the flow-speed conversion relationship, and the first operation speed, the second operation speed and the PID parameters are used as the operation parameters, wherein the first operation speed is the speed at which the powder feeding mechanism fills the target powder into the powder conveying mechanism, and the second operation speed is the speed at which the powder conveying mechanism conveys the target powder; When the flow-speed conversion relationship and the PID parameters corresponding to the target powder do not exist in the historical operation database, the flow-speed conversion relationship and the PID parameters are determined according to the test data of the target powder, the first operating speed and the second operating speed are determined according to the target flow and the flow-speed conversion relationship, and the flow-speed conversion relationship and the PID parameters are stored in the historical operation database.

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