Metering device, feeding system, mixing plant and feeding metering method

Abstract

The invention provides a metering device, a feeding system, a mixing plant and a feeding metering method.The metering device comprises a first stock bin, and the first stock bin is provided with a discharging opening; the second stock bin is located below the first stock bin and is provided with a feeding port, and the feeding port is communicated with the discharging port; and the air pressure balance pipe fitting comprises a first part located outside the first stock bin and the second stock bin, and the first part is communicated with the first stock bin and the second stock bin. Therefore, the feeding metering precision can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of powder metering, and in particular to a metering device, a feeding system, a mixing station, and a feeding metering method. Background Technology

[0002] In metal mine backfilling projects, continuous mixing backfilling is adopted. The continuous production process requires a continuous and stable supply of raw materials.

[0003] In related technologies, continuous powder feeding devices generally employ a dynamic metering mode. This mode is susceptible to interference from multiple coupled factors during the feeding process, resulting in low metering accuracy. Specifically, for example, fluctuations in the air pressure of the silo can cause inaccurate weighing; another example is the uneven feeding caused by the inclined arrangement of the discharge conveyor and the feeding screw conveyor. These single or combined factors cause significant fluctuations in both instantaneous and cumulative metering values ​​during continuous metering, reducing the accuracy of feeding and ultimately leading to a large deviation between the actual feed amount and the theoretical demand. Summary of the Invention

[0004] This application provides a metering device, a feeding system, a mixing plant, and a feeding metering method, which can effectively improve the accuracy of feeding metering.

[0005] In a first aspect, this application provides a metering device, comprising: a first hopper having a discharge port; a second hopper located below the first hopper and having a feed port, the feed port being connected to the discharge port; and a pressure balancing pipe comprising a first portion located outside the first hopper and outside the second hopper, the first portion being connected to the first hopper and the second hopper.

[0006] According to the metering device of this application embodiment, the first part connects the first silo and the second silo to form a pressure interconnection loop. Based on the basic characteristics of gas flow, the gas on the high-pressure side (second silo) will spontaneously flow to the low-pressure side (first silo), or the gas will flow from the first silo to the second silo, until the internal air pressure of the first silo and the second silo tends to be balanced, thus achieving air pressure balance between the first silo and the second silo. Therefore, this design can ensure that the air pressure of the first silo and the second silo remains stable, effectively avoiding interference with material weighing due to air pressure differences between the two, thereby ensuring the accuracy of subsequent feeding and metering. At the same time, air pressure balance can also maintain a stable feeding speed, improving the overall stability of the feeding process.

[0007] In one possible implementation of the first aspect of this application, the air pressure balancing pipe further includes a second part located within the first hopper, the second part extending vertically and communicating with the first part.

[0008] In one possible implementation of the first aspect of this application, the top of the first hopper has a first opening and a second opening; The air pressure balancing pipe also includes a cover, which is connected to the outside of the first hopper and covers the first opening and the second opening. The upper end of the second part communicates with the inside of the cover through the first opening.

[0009] In one possible implementation of the first aspect of this application, the metering device further includes: a control valve, through which the discharge port and the loading port are connected; a variable frequency conveyor having a feed inlet, the variable frequency conveyor being connected to the second silo, and the feed inlet being connected to the second silo; a first weighing sensor and a second weighing sensor, the first weighing sensor being used to measure the total weight of the first silo and the material inside, and the second weighing sensor being used to measure the total weight of the second silo, the variable frequency conveyor, and the material inside.

[0010] In one possible implementation of the first aspect of this application, the first part is a hose, the control valve is connected to the discharge port, and the control valve is connected to the feed port through the hose.

[0011] In one possible implementation of the first aspect of this application, the metering device further includes a frame, the first weighing sensor is connected between the frame and the first hopper, and the second weighing sensor is connected between the frame and the second hopper.

[0012] In one possible implementation of the first aspect of this application, the first part is a hose, the control valve is connected to the discharge port and the control valve is connected to the feed port through the hose, the metering device further includes a frame, the first weighing sensor is connected between the frame and the first hopper, and the second weighing sensor is connected between the frame and the second hopper.

[0013] In one possible implementation of the first aspect of this application, the variable frequency conveyor feeds materials in a horizontal direction.

[0014] Secondly, this application provides a feeding system, including the metering device, storage bin, and feeder described in the first aspect above, wherein the storage bin is connected to the feeder; The feeder is used to transport materials from the storage bin to the first silo.

[0015] In one possible implementation of the second aspect of this application, the feeding system further includes a control component, which is electrically connected to the first weighing sensor, the second weighing sensor, the variable frequency conveyor, the feeder, and the control valve. The control component is configured to control the opening and closing of the variable frequency conveyor, the feeder, and the control valve based on the measurement results of the first weighing sensor and the second weighing sensor.

[0016] Thirdly, this application provides a mixing plant, including the feeding system described in the second aspect above.

[0017] Fourthly, this application provides a feeding metering method, which is applied to the mixing plant described in the third aspect above, the method comprising: The cumulative feed weight of the feeding system Before reaching the preset total quantity, the feeding system is controlled to perform the feeding action N times in a loop, where N is a positive integer greater than or equal to 1; In each feeding action, the actual weight of material fed from the first hopper to the second hopper is determined. ; and determine the actual weight of the total remaining material in the second hopper and the variable frequency conveyor. , .

[0018] In one possible implementation of the fourth aspect of this application, determine The steps include: Determine the actual material weight D1 of the first silo before feeding into the second silo. After feeding into the second silo, determine the remaining material weight Z1 of the first silo. = D1-Z1. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the metering device provided in an embodiment of this application.

[0020] Figure 2 A cross-sectional view of the first hopper and the air pressure balance pipe provided in the embodiments of this application.

[0021] Figure 3 This is a schematic diagram of the feeding system provided in an embodiment of this application.

[0022] Figure 4 According to Figure 3 A magnified structural diagram of area A in the middle.

[0023] Figure 5 A top view of the first hopper provided for the application embodiment.

[0024] Figure label: 1. Metering device; 2. Storage bin; 3. Feeder; 4. Crushing and feeding components; 10. First hopper; 11. Second hopper; 12. Air pressure balance fitting; 13. Control valve; 14. Variable frequency conveyor; 15. First weighing sensor; 16. Second weighing sensor; 17. Frame; 100. Discharge port; 101. First opening; 102. Second opening; 103. Feed port; 120. First section; 121. Second section; 122. Cover. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] In this application, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0027] Unless otherwise stated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0028] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In the description of this application, "several" means one or more, unless otherwise explicitly specified.

[0029] In the description of this application, the terms “length”, “width”, “thickness”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0030] In the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; 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 also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In the description of this application, unless otherwise expressly defined, the terms "above," "over," "on top of," "below," "below," "under," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "below," and "over" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0032] In related technologies, continuous powder feeding devices generally employ a dynamic metering mode. This mode is susceptible to interference from multiple coupled factors during the feeding process, making it difficult to maintain stable metering accuracy. Specifically, for example, fluctuations in the air pressure of the silo can cause inaccurate weighing; differences in the physical properties of the powder to be conveyed can lead to agglomeration, bridging, or segregation during the feeding process; and the arrangement of the screw conveyor structure can result in uneven feeding. These single or combined factors cause significant fluctuations in both instantaneous and cumulative metering values ​​during continuous metering, ultimately leading to a large deviation between the actual feed rate and the theoretical demand.

[0033] In order to solve the above-mentioned technical problems, this application provides a metering device, a feeding system, a mixing plant, and a feeding metering method, which can effectively improve the accuracy of feeding metering.

[0034] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0035] Reference Figure 1 and Figure 2 The first aspect of this application provides a metering device 1, including a first hopper 10, a second hopper 11, and a pressure balancing pipe 12.

[0036] The first hopper 10 has a discharge port 100, which serves as the discharge outlet of the first hopper 10. For example, there can be multiple discharge ports 100 to increase the discharge speed of the first hopper 10. For instance, the number of discharge ports 100 can be 2, 3, 4, etc., which can be selected according to the actual situation.

[0037] The second hopper 11 is located below the first hopper 10 and has a feed inlet (not shown in the figure), which is connected to the discharge inlet 100. It can be understood that the feed inlet serves as the inlet for the second hopper 11, and the feed inlet and discharge inlet 100 are interconnected. Thus, when the first hopper 10 is discharging material, the material stored in the first hopper 10 can be smoothly discharged from the discharge inlet 100 under the influence of gravity, and then accurately enter the second hopper 11 through the feed inlet.

[0038] For example, there can be multiple feeding ports to increase the feeding speed of the second hopper 11, and there is a one-to-one correspondence between the multiple feeding ports and the multiple discharging ports 100. For example, the number of feeding ports can be 2, 3, 4, etc., which can be selected according to the actual situation.

[0039] The air pressure balancing pipe 12 includes a first portion 120 located outside the first hopper 10 and the second hopper 11, and the first portion 120 connects the first hopper 10 and the second hopper 11. Thus, the air pressure between the first hopper 10 and the second hopper 11 can be effectively balanced.

[0040] Specifically, during unloading, the material in the first hopper 10 decreases rapidly, creating a negative pressure. Meanwhile, the material in the second hopper 11 increases rapidly, creating a positive pressure. The negative pressure in the first hopper 10 adsorbs the material, hindering the normal descent of the powder. The positive pressure in the second hopper 11 pushes the powder back, creating air resistance and exacerbating the accumulation of powder at the discharge port 100, affecting the discharge speed and causing unstable discharge. At the same time, the pressure difference between the first hopper 10 and the second hopper 11 adds an additional force to the actual weight of the material, affecting the subsequent weighing weight and directly causing deviations in the measurement results. These deviations fluctuate with changes in the unloading speed and the state of material accumulation, affecting the measurement accuracy.

[0041] Furthermore, during unloading, the internal pressure of the second hopper 11 decreases sharply, creating a negative pressure. This negative pressure acts on the second hopper 11, generating an upward force. This force counteracts part of the downward force exerted by the weight of the material on the second weighing sensor, causing the reading of the second weighing sensor to be lower than the actual weight of the material, resulting in a weighing pull phenomenon and affecting the measurement accuracy.

[0042] The first part 120 connects the first silo 10 and the second silo 11 to form a pressure interconnection loop. According to the basic characteristics of gas flow, the gas on the high-pressure side (second silo 11) will spontaneously flow to the low-pressure side (first silo 10) or the gas will flow from the first silo 10 to the second silo 11 until the internal gas pressure of the first silo 10 and the second silo 11 tends to be balanced, thus achieving the balance of gas pressure between the first silo 10 and the second silo 11.

[0043] Therefore, this design ensures that the air pressure in the first hopper 10 and the second hopper 11 remains stable, effectively preventing interference with material weighing due to pressure differences between the two, thus guaranteeing the accuracy of subsequent feeding and metering. Simultaneously, the balanced air pressure also maintains a stable feeding speed, improving the overall stability of the feeding process.

[0044] Please see Figure 2 In some embodiments, the air pressure balancing pipe 12 further includes a second portion 121 located within the first hopper 10. The second portion 121 extends vertically and is connected to the first portion 120. Thus, by utilizing the second portion 121, the height of the connection port between the first portion 120 and the first hopper 10 can be increased, reducing the probability of material clogging the first portion 120 when the first hopper 10 is discharging material, and ensuring the stability of air pressure balance between the first hopper 10 and the second hopper 11.

[0045] For example, refer to Figure 2 In the specific embodiment shown, the first part 120 is arranged in a vertical direction, the second part 121 is also arranged in a vertical direction, and the first hopper 10 is located above the second hopper 11. On the one hand, this can reduce the arrangement length of the pipe fittings in the first part 120 and save costs. On the other hand, the second part 121 is hidden in the first hopper 10, which can also improve the aesthetics.

[0046] It should be noted that the second part 121 is a pipe fitting pre-embedded in the first silo 10. This pipe fitting can be a flexible hose or a rigid pipe. Preferred, this pipe fitting is a rigid pipe, which can effectively prevent deformation under the pressure of materials, thereby preventing the situation of poor gas flow caused by the deformation of the second part 121.

[0047] Please continue reading Figure 2 and Figure 5In some embodiments, the top of the first hopper 10 has a first opening 101 and a second opening 102. The pressure balancing pipe 12 also includes a cover 122, which is connected to the outside of the first hopper 10 and covers the first opening 101 and the second opening 102. The upper end of the second part 121 communicates with the inside of the cover 122 through the first opening 101. Thus, the gas in the second hopper 11 can flow into the cover 122 sequentially through the first part 120 and the second part 121, and then flow back into the first hopper 10 through the cover 122.

[0048] The upper end of the second part 121 extends directly to the top of the first hopper 10. In this way, when the first hopper 10 is feeding, the material will not fall into the second part 121, thus effectively avoiding the second part 121 from being blocked by the material and ensuring that the airflow can flow smoothly in the channel.

[0049] The cover 122 not only redirects airflow back into the first hopper 10, but also effectively intercepts material dust carried in the airflow, preventing it from escaping into the atmosphere. This design avoids environmental pollution caused by dust and reduces unnecessary waste of materials, achieving the dual benefits of environmental protection and resource conservation.

[0050] In addition, the return flow path formed by the first part 120, the second part 121 and the cover 122 can not only ensure the flow of gas, but also improve the aesthetics and avoid excessive pipeline exposure. The vertical connection of the first part 120 and the second part 121 avoids the pipeline from being bent and winding, and can also save material costs.

[0051] For example, the second opening 102 may extend circumferentially along the second portion 121, forming an arc-shaped opening to increase the opening area. Furthermore, referring to... Figure 5 The number of second openings 102 can be as many as possible, and multiple second openings 102 can be arranged circumferentially along the first opening 101, such as 2, 3, 4, etc.

[0052] Please see Figure 1 In some embodiments, the metering device 1 further includes a control valve 13, a variable frequency conveyor 14, a first weighing sensor 15, and a second weighing sensor 16.

[0053] The discharge port 100 and the feed port are connected by a control valve 13, which is used to control the opening or closing of the passage between the discharge port 100 and the feed port. For example, the control valve 13 can be a butterfly valve or other types of flow-blocking components.

[0054] The variable frequency conveyor 14 has a feed inlet and is connected to the second silo 11. The feed inlet is connected to the second silo 11. The variable frequency conveyor 14 is used to stably convey the material in the second silo 11 to the outside.

[0055] The first weighing sensor 15 and the second weighing sensor 16 are used to measure the total weight of the first hopper 10 and the materials inside it, and the second weighing sensor 16 is used to measure the total weight of the second hopper 11, the variable frequency conveyor 14 and the materials inside it.

[0056] For example, the first weighing sensor 15 and the second weighing sensor 16 can be load cells subjected to tensile stress or load cells subjected to compressive stress.

[0057] Specifically, the first weighing sensor 15 can acquire the weight of the first hopper 10 and the material inside before feeding. Subtracting the weight of the first hopper 10, the actual weight of the material inside the first hopper 10 can be calculated as D1. Simultaneously, the first weighing sensor 15 can also acquire the total amount of material in the first hopper 10 and its contents after feeding the second hopper 11. Subtracting the weight of the first hopper 10 from this data, the remaining weight Z1 after feeding the first hopper 10 can be calculated. Using D1-Z1, the actual weight of the material delivered to the second hopper 11 can be obtained. If material is fed from the first hopper to the second hopper 11 more than 10 times, multiple times will be obtained. Among them, the results obtained from multiple measurements The data may differ.

[0058] Simultaneously, the second weighing sensor 16 can also acquire real-time data on the weight changes of the second hopper 11, the variable frequency conveyor 14, and the total weight of the materials inside during the conveying process of the variable frequency conveyor 14. By subtracting the weight of the second hopper 11 and the variable frequency conveyor 14 itself, the weight of the remaining material can be obtained. The real-time acquisition of the total remaining material in the second hopper 11 and the variable frequency conveyor 14 is given as Q1. , To accumulate the total amount of materials transported to external sources, When compared with the preset total measurement target, When the preset total measurement target is reached, the variable frequency conveyor 14 can be stopped to ensure the accuracy of the measurement of the conveyed materials.

[0059] In addition, during the feeding process, the air pressure balance pipe 12 ensures that the air pressure of the first hopper 10 and the second hopper 11 remains stable, effectively avoiding interference with the material weighing due to the air pressure difference between the two, thereby improving the accuracy of feeding and metering.

[0060] Please see Figure 1In some embodiments, the first part 120 is a flexible hose, and the control valve 13 is connected to the discharge port 100, and the control valve 13 is connected to the feed port through the flexible hose. It is understood that when the second weighing sensor 16 weighs the second hopper 11, the first part 120 is designed as a flexible hose, which adapts to displacement through its own deformation, thus preventing the weight of the first hopper 10 from being transferred to the second hopper 11, ensuring the accuracy of the weighing data obtained by the second weighing sensor 16.

[0061] Similarly, one end of the control valve 13 is connected to the first hopper 10, and the other end is connected to the feed port through a hose, which can also prevent the weight of the first hopper 10 from being transferred to the second hopper 11, thus ensuring the accuracy of the weighing data obtained by the second weighing sensor 16.

[0062] Furthermore, during the installation of industrial equipment, there may be slight deviations in the relative positions of the first hopper 10 and the second hopper 11. The flexibility of the flexible hose can compensate for installation errors, avoid stress caused by forced connection of rigid pipes, and reduce the risk of pipe rupture and material leakage at the connection. At the same time, the second hopper 11 may experience slight vibrations during material transportation. Rigid pipes will transmit the vibrations of the second hopper 11 to the first hopper 10, causing the first weighing sensor 15 to collect fluctuating signals; while the flexible hose has a certain vibration damping and buffering effect, which can weaken the vibration transmission and further improve the stability of the weighing data.

[0063] For example, the hose may be a corrugated pipe.

[0064] Please see Figure 1 In some embodiments, the metering device 1 further includes a frame 17, a first weighing sensor 15 connected between the frame 17 and the first hopper 10, and a second weighing sensor 16 connected between the frame 17 and the second hopper 11. It can be understood that the frame 17 serves to suspend and support the first hopper 10 and the second hopper 11 via the first weighing sensor 15 and the second weighing sensor 16, respectively.

[0065] For example, refer to Figure 3 In the specific embodiment shown, one end of the first weighing sensor 15 is connected to the top of the frame 17, and the other end of the first weighing sensor 15 is connected to the outer wall of the first hopper 10, thereby connecting the first weighing sensor 15 between the frame 17 and the first hopper 10. In other embodiments, one end of the first weighing sensor 15 may also be connected to the inner wall of the frame 17, and the other end of the first weighing sensor 15 may be connected to the outer wall of the first hopper 10, thereby connecting the first weighing sensor 15 between the frame 17 and the first hopper 10.

[0066] For example, the connection between the first load cell 15 and the frame 17 or the first load cell 15 and the first hopper 10 may include, but is not limited to, welding, riveting, fastener connection, etc. Similarly, the connection of the second load cell 16 is the same as above.

[0067] Please see Figure 1 In some embodiments, the variable frequency conveyor 14 feeds material horizontally. This means that the material's trajectory in the variable frequency conveyor 14 is horizontal, and the support of the variable frequency conveyor 14 is connected to the second hopper 11. The material in the second hopper 11 can be directly fed into the variable frequency conveyor 14. Compared with inclined feeding, where the material will experience self-flow acceleration or downward stagnation due to the component of gravity, resulting in fluctuations in material discharge, horizontal feeding is less affected by gravity, thereby improving the stability of material conveying and discharge.

[0068] Preferably, the variable frequency conveyor 14 feeds material in a horizontal direction and is set parallel to the ground. The second hopper 11 is arranged vertically relative to the variable frequency conveyor 14. Thus, the material in the second hopper 11 can fill the variable frequency conveyor 14 to the maximum extent, so that the variable frequency conveyor 14 is fully filled with material, thereby satisfying the stability and uniformity of material feeding.

[0069] Please see Figure 3 The second aspect of this application provides a feeding system, including a metering device 1, a storage bin 2, and a feeder 3 as described in the first aspect. The storage bin 2 is connected to the feeder 3, and the feeder 3 is used to transport materials from the storage bin 2 to a first silo 10. The storage bin 2 is used to store materials, and the feeder 3 operates to transport materials from the storage bin 2 to the first silo 10.

[0070] For example, the first silo 10 has a feed port 103, and the feeder 3 has a discharge port. The feed port 103 and the discharge port can be arranged opposite each other to achieve a connection. Alternatively, the feed port 103 and the discharge port can be connected by a hose, so that the feeder 3 can transport materials from the storage silo 2 to the first silo 10.

[0071] For example, feeder 3 is a screw conveyor.

[0072] In some embodiments, a feeding system further includes a control component (not shown in the figures), which is electrically connected to a first weighing sensor 15, a second weighing sensor 16, a variable frequency conveyor 14, a feeder 3, and a control valve 13. The control component is configured to control the opening and closing of the variable frequency conveyor 14, the feeder 3, and the control valve 13 based on the measurement results of the first weighing sensor 15 and the second weighing sensor 16. This enables automatic loading and unloading as well as metering, thereby improving the automation level of the feeding system.

[0073] It should be noted that the control component can be a programmable logic controller, industrial computer, microcontroller, or other similar device, and can be selected according to the actual situation.

[0074] Specifically, the feeder 3 is started to convey materials into the first hopper 10.

[0075] The first weighing sensor 15 acquires the total weight of the first hopper 10 and the material inside, and sends the data to the control unit. The control unit subtracts the pre-stored weight of the first hopper 10 to calculate the actual feed weight in the first hopper 10. When the control unit determines that the actual feed weight in the first hopper 10 is equal to the preset feed threshold (which can be set according to actual conditions), it controls the feeder 3 to stop, records the current actual material weight as D1, and controls the control valve 13 to open according to the preset opening time. The preset opening time can be set according to actual conditions. For example, if the preset opening time is 2 seconds, after the control valve 13 opens, the material in the first hopper 10 will fall directly into the second hopper 11 due to gravity.

[0076] If the control unit determines that the preset opening time of the current control valve 13 has ended, the control unit controls the control valve 13 to close, the first hopper 10 stops conveying material to the second hopper 11, and records the remaining material weight in the first hopper 10 at this time as Z1. At the same time, the control unit starts the variable frequency conveyor 14 and the feeder 3. The variable frequency conveyor 14 starts to extract material from the second hopper 11 and convey it to the outside. The feeder 3 starts to extract material from the storage bin 2 and convey it to the first hopper 10 until the actual feed weight in the first hopper 10 reaches the preset feed threshold again. Then, the feeder 3 is controlled to stop and the control valve 13 will not be opened. The actual material weight in the first hopper 10 in the new round is recorded as D2.

[0077] Based on the data acquired by the second weighing sensor 16, if the control unit determines that the weight of the material in the second hopper 11 is lower than the preset discharge weight, the control unit opens the control valve 13 for a preset opening time, and the first hopper 10 discharges material to replenish the second hopper 11. After the control unit receives a signal from the control valve 13 to stop, the control unit receives the data acquired by the first weighing sensor 15 and calculates the remaining weight of the material in the first hopper 10 as Z2. The preset discharge weight can be set according to actual conditions, for example, a preset discharge weight of 200 kg.

[0078] In this cycle, the control unit also acquires the weighing data from the second weighing sensor 16 in real time to calculate the total amount of residual material inside the second hopper 11 and the variable frequency conveyor 14. The control components calculate the cumulative flow in real time. The accounting formula is: , n≥1. The control unit will calculate in real time... When compared with the preset total measurement target, When the preset total measurement target is reached, immediately stop the variable frequency conveyor 14 to complete the measurement operation.

[0079] Furthermore, during the feeding process, the control unit accurately calculates the instantaneous flow rate Q by monitoring the dynamic changes in the total weight of powder in the second hopper 11 and the variable frequency conveyor 14 within a preset unit time. 瞬 The control unit compares and analyzes the instantaneous flow rate with a preset flow rate threshold in real time, and dynamically adjusts the frequency conversion power of the variable frequency conveyor 14 accordingly. When the instantaneous flow rate is lower than the target value, the conveying speed is increased; when the instantaneous flow rate exceeds the target value, the conveying speed is decreased. Through this closed-loop adjustment mechanism, it is ensured that the instantaneous flow rate of the material conveyed by the variable frequency conveyor 14 always strictly matches the preset target flow rate, fundamentally guaranteeing the uniformity and stability of the feeding process and effectively avoiding the impact of flow rate fluctuations on subsequent production stages. Among them, Q... 瞬= The total unit time variable of powder material in the second hopper 11 and the variable frequency conveyor 14 / preset unit time, where the preset unit time can be selected according to the actual situation. For example, the preset unit time is 0.5s.

[0080] It should be noted that during the entire feeding process, the air pressure balancing pipe 12 is constantly balancing the air pressure of the first hopper 10 and the second hopper 11.

[0081] Please continue to refer to Figure 4 Optionally, a feeding system further includes a breaking and feeding component 4, which is electrically connected to a control component. The breaking and feeding component 4 is used to break up the blockage of powder at the discharge port of the storage bin 2 by any one or more combinations of air blowing, impact, vibration, or rotation. For example, the breaking and feeding component can be a vibrating motor, a pneumatic hammer, a mixing device, etc. The following detailed description uses a pneumatic hammer as an example. The outer wall of the storage bin 2 has a through hole. The pneumatic hammer is connected to the outer wall of the storage bin 2. The impact end of the pneumatic hammer is inserted into the storage bin 2 through the through hole, and the impact end of the pneumatic hammer faces the discharge port of the storage bin 2. By controlling the impact end of the pneumatic hammer to impact the blockage, the blockage of powder at the discharge port of the storage bin 2 is broken up, ensuring smooth feeding.

[0082] Specifically, when the control component determines that the actual feed weight is lower than the preset feed threshold within the preset feeding time period, it will start the breaking feed component 4 according to the preset running time, thereby effectively clearing the discharge port of the storage bin 2.

[0083] The technical effects of the second aspect of this application can be referred to the technical effects of the first aspect of this application, and will not be repeated here.

[0084] A third aspect of this application provides a mixing plant, including the feeding system described in the second aspect above.

[0085] The technical effects of the third aspect of this application can be referred to the technical effects of the second aspect of this application, and will not be repeated here.

[0086] The fourth aspect of this application provides a feeding metering method, which applies the mixing plant described in the third aspect above, and the method includes: The cumulative feed weight of the feeding system Before reaching the preset total metering, the feeding system is controlled to perform the feeding action N times in a loop, where N is a positive integer greater than or equal to 1. The feeding action refers to the action of feeding material from the first hopper 10 to the second hopper 11. Each feeding from the first hopper 10 to the second hopper 11 is counted once, which means that each time the control valve 13 is opened, it is counted once.

[0087] Specifically, during the cyclical feeding operation, if the actual total material volume in the first hopper 10 is determined to be equal to the preset feeding threshold, the control valve 13 is opened for a preset opening duration. Subsequently, if the actual material volume in the second hopper 11 is determined to be lower than the preset feeding weight, the control valve 13 is opened once for the preset opening duration. After each control valve 13 closes, the feeder 3 is activated to replenish material into the first hopper 10 until the actual feeding weight in the first hopper 10 reaches the preset feeding threshold again, at which point the feeder 3 stops. This forms a cyclical feeding operation, and a new round of calculations can be obtained before and after each opening of the control valve 13. .

[0088] In each feeding action, the actual weight of material fed from the first hopper 10 to the second hopper 11 is determined. And determine the actual weight of the total remaining material in the second hopper 11 and the variable frequency conveyor 14. , .in, The cumulative weight of materials transported to external locations. For multiple sets obtained in N iterations The cumulative sum of the data, that is, the total amount of material conveyed from the first hopper 10 to the second hopper 11 during the feeding period, is used to... This is used to obtain the actual weight of the materials exported.

[0089] Further, determine The steps include: determining the actual material weight D1 in the first hopper 10 before the feeding action begins; and determining the remaining material weight Z1 after the first hopper 10 feeds material into the second hopper 11. =D1-Z1.

[0090] In some embodiments, the method further includes: Compare with the preset total measurement target, and when it is determined When the preset total metering threshold is reached, the variable frequency conveyor 14 is immediately stopped to complete the metering operation. Specifically, when the control unit determines the current... When the total metering threshold of the material is reached, the variable frequency conveyor 14 is stopped to complete the metering process.

[0091] In some embodiments, the method further includes: calculating the instantaneous flow rate Q of the material supplied by the feeding system. 瞬 and Q 瞬 The variable frequency conveyor 14 is controlled by comparing the flow rate with a preset threshold. Specifically, Q... 瞬= The total unit time flow rate of powder in the second hopper 11 and the variable frequency conveyor 14 is divided by a preset unit time. This instantaneous flow rate is compared and analyzed in real time with a preset flow rate threshold. Based on this, the variable frequency power of the variable frequency conveyor 14 is dynamically adjusted. When the instantaneous flow rate is lower than the target value, the conveying speed is increased; when the instantaneous flow rate exceeds the target value, the conveying speed is decreased. Through this closed-loop adjustment mechanism, the instantaneous flow rate of the material conveyed by the variable frequency conveyor 14 is always strictly matched with the preset target flow rate, fundamentally ensuring the uniformity and stability of the feeding process and effectively avoiding the impact of flow rate fluctuations on subsequent production stages.

[0092] It should be noted that the instantaneous flow rate and cumulative flow rate remain constant and are not calculated during the period from when control valve 13 opens and unloading is completed until control valve 13 closes. Recalculation begins after the control valve 13 closes to avoid significant fluctuations in the measurement results of the second weighing sensor 16 during the material discharge from the first hopper 10 to the second hopper 11, which could affect the measurement of Q. 瞬 The calculation.

[0093] In some embodiments, the method further includes: when the actual feed weight detected in the first hopper 10 is lower than a preset feed threshold within a preset feeding time period, the feed breaking component 4 will be started according to a preset running time. This effectively achieves automated unblocking of the discharge port of the storage hopper 2.

[0094] Specifically, when the control component determines that the actual feed weight is lower than the preset feed threshold within the preset feeding time period, it will start the breaking feed component 4 according to the preset running time. The breaking feed component 4 will break the blockage of powder at the discharge port of storage bin 2 by any one or more combinations of air blowing, impact, vibration or rotation, thereby effectively clearing the blockage at the discharge port of storage bin 2.

[0095] The technical effects of the fourth aspect of this application can be referred to the technical effects of the third aspect of this application, and will not be repeated here.

[0096] It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0097] It is understood that the various implementation methods described in this application can be implemented individually or in combination, and the embodiments of this application are not limited in this respect.

[0098] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0099] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A measuring device, characterized in that, include: The first hopper has a discharge port; The second hopper is located below the first hopper and has a feed inlet that is connected to the discharge inlet. A pressure balancing pipe fitting, the pressure balancing pipe fitting including a first part located outside the first hopper and outside the second hopper, the first part connecting the first hopper and the second hopper.

2. The metering device according to claim 1, characterized in that, The air pressure balancing pipe also includes a second part located inside the first hopper, the second part extending vertically and connected to the first part.

3. The metering device according to claim 2, characterized in that, The top of the first hopper has a first opening and a second opening; The air pressure balancing pipe also includes a cover, which is connected to the outside of the first hopper and covers the first opening and the second opening. The upper end of the second part communicates with the inside of the cover through the first opening.

4. The metering device according to claim 1, characterized in that, Also includes: A control valve is provided, through which the discharge port and the loading port are connected; A variable frequency conveyor, wherein the variable frequency conveyor has a feed inlet, the variable frequency conveyor is connected to the second hopper, and the feed inlet is in communication with the second hopper; A first weighing sensor and a second weighing sensor, wherein the first weighing sensor is used to measure the total weight of the first silo and the material inside it, and the second weighing sensor is used to measure the total weight of the second silo, the variable frequency conveyor, and the material inside it.

5. The metering device according to claim 4, characterized in that, The first part is a hose, the control valve is connected to the discharge port, and the control valve is connected to the feed port through the hose; And / or, it also includes a frame, with the first weighing sensor connected between the frame and the first hopper, and the second weighing sensor connected between the frame and the second hopper.

6. The metering device according to claim 4, characterized in that, The variable frequency conveyor feeds materials in the horizontal direction.

7. A feeding system, characterized in that, Includes the metering device, storage bin, and feeder according to any one of claims 1-6, wherein the storage bin is connected to the feeder; The feeder is used to transport materials from the storage bin to the first silo.

8. The feeding system according to claim 7, characterized in that, The measuring device is the measuring device according to claim 4; It also includes a control component, which is electrically connected to the first weighing sensor, the second weighing sensor, the variable frequency conveyor, the feeder, and the control valve. The control component is configured to control the opening and closing of the variable frequency conveyor, the feeder, and the control valve based on the measurement results of the first weighing sensor and the second weighing sensor.

9. A mixing plant, characterized in that, Includes the feeding system according to claim 7 or 8.

10. A feeding and metering method, characterized in that, The metering method is applied to the mixing plant according to claim 9, and the method includes: The cumulative feed weight of the feeding system Before reaching the preset total quantity, the feeding system is controlled to perform the feeding action N times in a loop, where N is a positive integer greater than or equal to 1; Specifically, in each feeding action, the actual weight of material fed from the first hopper to the second hopper is determined. ; and determine the actual weight of the total remaining material in the second hopper and the variable frequency conveyor. , .

11. The feeding and metering method according to claim 10, characterized in that, Sure The steps include: Determine the actual material weight D1 of the first silo before feeding into the second silo. After feeding into the second silo, determine the remaining material weight Z1 of the first silo. = D1-Z1.

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