Metering assembly, compounding system and compounding method

Abstract

The present application relates to the field of compounding technology, and specifically to a metering component, a compounding system and a compounding method. The metering component includes a base; at least two buffer pads, the buffer pads are arranged below the base; a metering bin, the metering bin is arranged on the base; a metering sensor, the metering sensor is arranged between the base and the metering bin, and is used to weigh the material in the metering bin; and a load sensor, the load sensor is arranged on the buffer pad, and is used to measure the load of the buffer pad. The metering component has high metering accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of material mixing, and in particular, to a metering component, a compounding system and a compounding method. Background Art

[0002] Compounding technology (batching and mixing) is widely used in the manufacturing industry. For example, in the production process of lithium battery positive electrode materials, the compounding process is the first step in production, and the quality of the compounding results directly affects the performance and quality of the product. With the continuous advancement of automation and intelligence, the accuracy requirements of the compounding process are getting higher and higher. At present, the deviations in the compounding process are large, which is very easy to cause unqualified compounding. Frequent feeding, mixing and retesting make the production process more passive, and the production efficiency is greatly reduced. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention provides a metering component, a mixing system and a mixing method with high accuracy or high production efficiency.

[0004] In a first aspect of the present application, a metering assembly is provided. According to an embodiment of the present application, the metering assembly includes: a base; at least two buffer pads, the buffer pads are arranged below the base; a metering bin, the metering bin is arranged on the base; a metering sensor, the metering sensor is arranged between the base and the metering bin, and is used to weigh the material in the metering bin; and a load sensor, the load sensor is arranged on the buffer pad, and is used to measure the load of the buffer pad.

[0005] According to an embodiment of the present application, the metering component also includes: a metering bin air cap, which is arranged on the metering bin and is used to ventilate the metering bin; a metering bin filter assembly, which is arranged in the metering bin air cap and is used to filter the material; a metering bin dust collecting assembly, which is used to provide suction or backblowing force to the metering bin air cap to promote the material to be collected by the metering bin filter assembly or to backblow the material collected by the metering bin filter assembly into the metering bin, and the metering bin dust collecting port of the metering bin dust collecting assembly is arranged opposite to the metering bin air cap, and the distance between the metering bin dust collecting port and the metering bin air cap is 1cm to 3cm.

[0006] In a second aspect of the present application, a compounding system is provided. According to an embodiment of the present application, the compounding system includes at least one batching device and a mixing device: the batching device includes: a storage bin for storing materials; the aforementioned metering assembly, in which the metering bin is connected to the storage bin; and a screw feeding assembly, which is connected to the metering bin and the mixing device and is used to transport the materials in the metering bin to the mixing device.

[0007] According to an embodiment of the present application, the mixing device includes a mixer and a breathable component, the mixer is connected to the feeding component, and the breathable component is arranged on the mixer; a mixing filter component and a pressure sensor are arranged in the breathable component, the mixing filter component is used to filter the material, and the pressure sensor is used to detect the pressure inside the mixer.

[0008] According to an embodiment of the present application, the mixing device also includes a mixing dust collecting component, which is arranged opposite to the breathable component, and is used to provide suction or backblowing force for the breathable component to promote the material to be collected by the mixing filter component or to backblow the material collected by the mixing filter component into the mixer. An electromagnetic valve is provided in the mixing dust collecting component to control the opening and closing of the mixing dust collecting component.

[0009] In a third aspect of the present application, a mixing method is provided which is implemented using the mixing system described above. According to an embodiment of the present application, the method includes: adjusting the heights of at least two buffer pads in a metering assembly to be substantially the same through a load sensor; conveying the material to be mixed stored in a storage bin to a metering bin; conveying a predetermined weight W of the material to be mixed from the metering bin to a mixing device through the spiral feeding assembly; and uniformly mixing the material to be mixed in the mixing device.

[0010] According to an embodiment of the present application, during the process of conveying the material to be mixed from the metering bin to the mixing device, the solenoid valve in the mixing dust collecting assembly remains closed.

[0011] According to an embodiment of the present application, the material to be mixed is transported from the metering bin to the mixing device, including a first feeding stage and a second feeding stage performed sequentially:

[0012] The first feeding stage includes: causing the spiral feeding component to convey 0.95W to 0.995W of the material to be mixed into the mixing device at a frequency of 15Hz to 50Hz;

[0013] The second feeding stage includes: enabling the spiral feeding component to convey the remaining material to be mixed to the mixing device at a frequency of 3 Hz to 15 Hz.

[0014] According to an embodiment of the present application, in the second feeding stage, the mixer stops running; and / or the solenoid valve in the mixing dust collecting assembly remains closed.

[0015] According to an embodiment of the present application, the mixing system includes a first feed valve, a connecting pipeline, and a second feed valve connected in sequence, the first feed valve is connected to a screw feed assembly, and the second feed valve is connected to a mixer; within 1s to 3s after the material to be mixed of the predetermined weight W is transported from the metering bin to the mixing device, the first feed valve is closed, and within 5s to 15s, the second feed valve is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a metering component of an embodiment of the present application.

[0017] Figure 2 It is a structural schematic diagram of a metering component of another embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the structure of a mixing system according to an embodiment of the present application.

[0019] Figure 4 It is a schematic structural diagram of a mixing system according to another embodiment of the present application.

[0020] Figure 5 It is a schematic structural diagram of a mixing system according to yet another embodiment of the present application.

[0021] Figure 6 It is a schematic diagram of a mixing method according to an embodiment of the present application.

[0022] Figure 7 This is a photo of a steel frame base according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] This application is completed based on the following findings and understandings of the inventors:

[0025] The existing mixing and metering process has large metering deviations, and the mixing results are often unqualified and fluctuate greatly, which indirectly affects the product indicators and production efficiency. The inventors found that in the current automated mixing process, the reasons that affect the accuracy of mixing and metering are not fully identified, and there is no effective means to improve the accuracy of mixing and metering, which leads to large deviations in the mixing process, and it is very easy to produce unqualified mixing. Frequent feeding, mixing and retesting make the production process more passive, and the production efficiency is greatly reduced. Based on this, the inventors conducted further research and found that there are many factors that affect the accuracy of mixing and metering, mainly including the influence of the dust collection component of the mixing device, the influence of the dust collection component of the metering bin, the influence of unreasonable system programs and parameters, the influence of the shaking of the metering bin base, and the influence of the pressure holding of the mixing device. Based on the above findings, the inventors provide a metering component, a mixing system and a mixing method that can improve the metering accuracy and have high processing efficiency.

[0026] In view of this, in the first aspect of the present application, a metering component is provided. According to an embodiment of the present application, referring to Figure 1 The metering component 10 includes: a base 11; at least two buffer pads 12, wherein the buffer pads 12 are arranged below the base 11; a metering bin 13, wherein the metering bin 13 is arranged on the base 11; a metering sensor 101, wherein the metering sensor 101 is arranged between the base 11 and the metering bin 13, and is used to weigh the material in the metering bin 13; and a load sensor 102, wherein the load sensor 102 is arranged between the buffer pad 12 and the base 11, and is used to measure the load of the buffer pad 12.

[0027] In the metering component, by arranging a load sensor between the buffer pad and the base, the pressure exerted on the buffer pad can be converted into an electrical signal output. By comparing the electrical signals of multiple buffer pads, it is possible to intuitively determine whether the heights of the buffer pads are consistent, and according to the guidance of the electrical signals of the load sensor, the heights of the multiple buffer pads can be conveniently adjusted to be basically consistent, so that the base will not shake, the metering bin can measure stably, and the accuracy of measurement is improved.

[0028] According to the embodiments of the present application, there are no particular restrictions on the structure, shape, material, etc. of the base, as long as it can effectively carry the metering bin. As an example, the base can be a steel frame platform, such as a square (square or rectangular) steel frame (see the photo) Figure 7 ).

[0029] According to an embodiment of the present application, the number of the buffer pads may be multiple, for example, specifically 2, 3, 4, 5, 6, etc. As an example, the base is square, and the number of the buffer pads may be 4, which are respectively arranged at the four corners of the base.

[0030] According to an embodiment of the present application, the load sensor includes an elastic body and a resistive strain gauge. As an example, the elastic body and the resistive strain gauge can be stacked, the resistive strain gauge is firmly fixed to the elastic body, the elastic body (which can be made of steel or aluminum) produces a certain amount of deformation under load, but the elastic body will return to the initial position after the load is removed, and elastically respond to each load; the resistive strain gauge is firmly fixed to the elastic body, so the resistive strain gauge undergoes the same movement, and the resistance changes accordingly according to the deformation. Each load sensor may include four resistive strain gauges. During the deformation process, two resistive strain gauges are stretched and the other two resistive strain gauges are compressed. The four resistive strain gauges are formed into a Wheatstone bridge. The Wheatstone bridge needs to be measured by an excitation voltage. When the resistance of the four resistive strain gauges is different, that is, when the resistance of the resistive strain gauge changes due to the strain, an output voltage will be generated, and the output voltage signal reflects the weighing weight.

[0031] Specifically, when the base is placed on the cushion, the elastic body is deformed, and the resistance value on the corresponding resistance strain gauge changes. By comparing the resistance values ​​corresponding to different cushions, it can be determined whether the heights of the cushions are consistent. For example, when the percentage difference in the resistance values ​​corresponding to any two cushions is within the range of ±1%, it can be determined that the multiple cushions are in a flush state (i.e., the heights are consistent). Otherwise, it is determined to be abnormal, and the cushions need to be checked until the multiple cushions are in a flush state. In this application, the percentage difference = |the difference between the two values / the average value of the two values|×100%.

[0032] According to the embodiments of the present application, the specific type of the metering sensor is not particularly limited, as long as it can effectively measure the material output from the metering bin. As an example, the metering sensor can be a weighing sensor, which is a device that converts physical weight or force into a measurable electrical signal or other form of signal. Thus, the mass of the material output from the metering bin can be conveniently measured by the difference in weight in the metering bin.

[0033] As an example, a digital weighing sensor can be used. There is a digital circuit inside the weighing sensor, and the output signal is digital and enters the instrument. Specifically, the weighing sensor includes an elastomer and a strain gauge. When the elastomer is subjected to force, its length will change, and its strain is proportional to the external force. The strain gauge can be composed of a metal wire. When the length of the metal wire changes, its resistance changes accordingly, and thus it is designed as a resistance strain gauge. When the strain gauge is pasted on the elastomer, the deformation of the elastomer after being subjected to force causes the resistance value of the strain gauge to change, which is then converted into a digital signal and enters the instrument to reflect the weight of the measuring bin.

[0034] According to the embodiments of the present application, referring to Figure 2The metering component 10 also includes: a metering bin air cap 14, which is arranged on the metering bin 13; a metering bin filter component, which is arranged in the metering bin air cap 14 and is used to filter the material; a metering bin dust collecting component 15, which is used to provide suction or backblowing force to the metering bin air cap 14 to promote the material to be collected by the metering bin filter component or to backblow the material collected by the metering bin filter component into the metering bin, and the metering bin dust collecting port 151 of the metering bin dust collecting component 15 is arranged opposite to the metering bin air cap 14, and the distance between the metering bin dust collecting port 151 and the metering bin air cap 14 is 1cm to 3cm, such as 1cm, 1.2cm, 1.5cm, 1.8cm, 2cm, 2.2cm, 2.5cm, 2.8cm, 3cm, etc.

[0035] It can be understood that the metering system is a weight-loss metering system. The weight difference in the metering bin is converted into an electrical signal output as a weight value. As the metering process proceeds, the metering bin will gradually become lighter and the metering bin will slowly rise. The distance between the metering bin air cap and the metering bin dust collecting port meets the above range. The dust collection effect will not be affected due to excessive gap, which may lead to powder spraying / powder penetration problems; nor will the actual metering be affected due to the existence of contact (too small distance), which is beneficial to improve the accuracy of the measurement.

[0036] According to an embodiment of the present application, the metering bin filter assembly includes a sintered plate dust collector. Specifically, during operation, the dust-containing gas enters the dust collector through the air inlet duct under the negative pressure of the fan. When the airflow passes through the sintered plate dust collector, the dust particles in the gas are effectively captured and deposited on the plate surface due to the interception effect of the porous structure, and the purified gas is discharged through the air outlet duct; as the filtering time goes by, the dust layer on the sintered plate gradually thickens, resulting in an increase in the filtration resistance, and a cleaning operation is required at this time. Cleaning usually adopts pulse blowing or reverse airflow and other methods. The impact force generated by the instantaneous release of high-pressure gas or the change in the direction of the airflow is used to loosen and fall off the dust layer deposited on the sintered plate, and fall into the metering bin to ensure accurate metering.

[0037] Specifically, the specific working process of the metering component of the present application may include:

[0038] Before metering begins, the height of the buffer pad is adjusted to remain consistent through the load sensor, so that the base is not prone to shaking during the metering process and affecting the accuracy of the metering. The metering sensor can test the quality of the material in the metering bin in real time. During the metering process, the material is output from the metering bin from the outlet of the metering bin. The metering sensor can measure the weight of the material output from the metering bin through weight loss metering. During the metering process, the metering bin dust collection component can be turned on, and the fan can provide negative pressure to the metering bin air cap. The material is collected by the metering bin filter component in the metering bin air cap. According to the amount of material collected in the filter component, the material collected by the metering bin filter component can be blown back to the metering bin by backblowing at regular intervals.

[0039] In a second aspect of the present application, a compounding system is provided. According to an embodiment of the present application, referring to Figure 3 The compounding system 100 includes at least one batching device 1 and a mixing device 2, wherein the batching device 1 includes: a storage bin 20 for storing materials; the aforementioned metering assembly 10, wherein the metering bin 13 in the metering assembly is connected to the storage bin 20; and a screw feeding assembly 30, wherein the screw feeding assembly 30 is connected to the metering bin 13 and the mixing device 2, and is used to transport the materials in the metering bin 13 to the mixing device 2. The compounding system can measure materials with high precision, the deviation in the compounding process is small, the probability of unqualified compounding is low, the production efficiency is effectively improved, and the quality of the materials obtained by compounding is high, thereby significantly improving the performance and quality of the obtained products.

[0040] According to the embodiments of the present application, referring to Figure 3 The mixing device includes a mixer 201 and a breathable component 202, wherein the mixer 201 is connected to the spiral feed component 30, and the breathable component 202 is arranged on the mixer 201; the breathable component 202 is provided with a mixing filter component and a pressure sensor, wherein the mixing filter component is used to filter materials, and the pressure sensor is used to detect the pressure inside the mixer. It can be understood that if there is pressure buildup in the mixing system, the pressure in the mixer cannot be discharged in time during the metering process, which will cause stress in the metering bin and deviation in the final metering result. By setting a pressure sensor, when the mixing filter component is blocked and the pressure is too high (for example, when the pressure is greater than 200Pa), an alarm can be triggered, so that the mixing filter component can be cleaned in time to relieve the pressure buildup in the mixer, thereby improving the accuracy as much as possible.

[0041] According to the embodiments of the present application, the specific type of the mixer is not particularly limited and can be flexibly selected according to actual conditions. In some embodiments, the mixer can be a plow blade mixer. Specifically, the plow blade mixer causes the material to turbulently move in a radial circle along the cylinder wall through the rotation of the plow blade. The plow blade is similar in shape to a plow and is fixed on a horizontal transmission shaft by a bracket. It rotates along the wall of the device, causing the material to diffuse and rub against each other to shear, so that the material can be quickly mixed evenly.

[0042] According to the embodiments of the present application, referring to Figure 3 The mixing device 2 also includes a mixing dust collecting component 203, which is arranged opposite to the breathable component 202, and is used to provide suction or back-blowing force for the breathable component, so as to promote the material to be collected by the mixing filter component or back-blowing the material collected by the mixing filter component into the mixer 201. The mixing dust collecting component 203 is provided with a solenoid valve 204, which is used to control the opening and closing of the mixing dust collecting component 203. Specifically, during the batching metering process, the mixing dust collecting component has a large suction force on the inside of the mixer. It has been verified that opening the mixing dust collecting component during the metering process will cause a large final metering deviation (such as 1kg to 2kg), and the metering process is seriously uncontrollable. By installing a solenoid valve, the mixing dust collecting component can be closed when metering and unloading, so as to avoid the influence of the mixing dust collecting component on the metering accuracy.

[0043] According to the embodiments of the present application, referring to Figure 4 The compounding system further includes a first feed valve 31, a connecting pipeline 32, and a second feed valve 33 which are connected in sequence, wherein the first feed valve 31 is connected to the screw feed assembly 30, and the second feed valve 33 is connected to the mixer 201. With such an arrangement, after metering is completed, by adjusting the closing time of the first feed valve and the second feed valve, all materials can enter the mixer without over-metering, thereby facilitating improving the metering accuracy.

[0044] According to an embodiment of the present application, the first feed valve and the second feed valve can be butterfly valves, and the connecting pipeline can be a flexible connecting pipeline, which is convenient for opening and closing the feed valves. There is no rigid connection between the flexible connecting pipeline and the spiral feed assembly and the mixer, so they will not affect each other, and the sealing effect is better.

[0045] In some embodiments, reference Figure 5 The compounding system also includes a feeding component 40. Specifically, a ton bag 401 filled with materials can be lifted by a hook of the feeding system, and then the bottom of the ton bag can be opened to add the materials into the storage bin 20 through a feeding port 402.

[0046] In some embodiments, the number of batching devices in the mixing system can be selected according to the type of materials. For example, when two materials are mixed, two batching devices can be included; when three materials are mixed, three batching devices can be included. The specific number can be flexibly selected according to actual needs.

[0047] In a third aspect of the present application, a compounding method is provided that is implemented using the compounding system described above. According to an embodiment of the present application, the compounding method includes: adjusting the heights of at least two buffer pads in the metering assembly to be substantially the same through a load sensor; conveying the material to be mixed stored in the storage bin to the metering bin; conveying the material to be mixed of a predetermined weight W from the metering bin to the mixing device through the spiral feeding assembly; and uniformly mixing the material to be mixed in the mixing device. In this method, by adjusting the height of the buffer pads to be substantially consistent, the shaking of the metering bin can be effectively improved, thereby significantly improving the metering accuracy.

[0048] It should be noted that the height being basically the same should be understood in a broad sense, meaning that the height can be exactly the same, or it can have a certain fluctuation within a reasonable error range, for example, it can fluctuate within the range of ±5% or ±1%.

[0049] According to an embodiment of the present application, adjusting the height of at least two buffer pads in the metering assembly to be substantially the same by means of load sensors includes: the percentage difference of the resistance values ​​of the load sensors on any two of the buffer pads is within the range of ±1%. Specifically, the percentage difference N of the resistance values ​​of the load sensors on the two buffer pads satisfies N=(N1-N2) / [(N1+N2) / 2], wherein N1 and N2 are the resistance values ​​of the load sensors on the two buffer pads, respectively, and N within the range of ±1% means -1%≤N≤1%. When the percentage difference N is within the above range, the height of the buffer pads is substantially consistent, the metering bin will basically not shake, and the metering accuracy is higher.

[0050] According to an embodiment of the present application, during the process of transporting the material to be mixed from the metering bin to the mixing device, the solenoid valve in the mixing dust collecting assembly remains closed. Therefore, during the batching metering process, the suction force of the mixing dust collecting assembly will not affect the metering bin, thereby avoiding metering deviations caused thereby.

[0051] According to an embodiment of the present application, the material to be mixed is transported from the metering bin to the mixing device, including a first feeding stage and a second feeding stage performed in sequence: the first feeding stage includes: the spiral feeding component transports 0.95W to 0.995W of the material to be mixed to the mixing device at a frequency of 15Hz to 50Hz; the second feeding stage includes: the spiral feeding component transports the remaining material to be mixed to the mixing device at a frequency of 3Hz to 15Hz. Thus, the feeding stage can include a fast feeding stage (i.e., the first feeding stage) and a slow feeding stage (i.e., the second feeding stage), the fast feeding stage can have a faster working efficiency, and the slow feeding stage has a higher metering accuracy, which can effectively improve the problem of over-metering.

[0052] According to an embodiment of the present application, in the second feeding stage, the mixer stops running; and / or the solenoid valve in the mixing dust collecting assembly remains closed. Thus, the influence of the operation of the mixer and the suction and / or back-blowing force of the mixing dust collecting assembly on the metering bin can be further avoided, thereby further improving the metering accuracy.

[0053] According to an embodiment of the present application, after the predetermined weight W of the material to be mixed is delivered from the metering bin to the mixing device, the first feed valve is closed within 1s to 3s, and the second feed valve is closed within 5s to 15s. Specifically, quickly closing the first feed valve can prevent excessive material from entering the mixer, and closing the second feed valve after waiting for a certain period of time can allow all the material to be mixed remaining in the connecting pipeline to enter the mixer, thereby facilitating improved metering accuracy.

[0054] According to an embodiment of the present application, after the second feed valve is closed for 30 seconds, the solenoid valve in the mixing dust collecting assembly is opened, and then the mixer is turned on to mix the materials, thereby facilitating the improvement of the measurement accuracy.

[0055] As an example, refer to Figure 5-6 Taking the mixer as a plowshare mixer as an example, the specific steps of the mixing method of the present application are described in detail:

[0056] ① Start preparing for pre-production inspection:

[0057] Four buffer pads are arranged under the base, and a load sensor is installed at the connection. The load sensor is composed of an elastomer and a resistive strain gauge. When the base is placed on the buffer pad, the elastic object is deformed, and the resistance value on the corresponding resistive strain gauge changes. When the resistance values ​​of the four buffer pads are consistent (the percentage difference is within the range of ±1%), it can be determined that the buffer pads are in a flush state, otherwise it is determined to be abnormal and the buffer pads need to be calibrated. When calibrating the buffer pads, first use a mobile hydraulic vehicle to prop up the base to confirm whether the buffer pads are worn and positionally shifted. If wear occurs, a new buffer pad needs to be replaced. If there is positional shift, the position needs to be adjusted. After replacement or adjustment, the resistance values ​​of the four buffer pads are confirmed again.

[0058] Confirm that the dust collecting port of the metering bin is not in contact with the breathable cap of the metering bin, and that the mixing filter component in the breathable component is clean and free of residual foreign matter.

[0059] ② Close the solenoid valve in the mixing dust collection component;

[0060] ③ Open the butterfly valve at the discharge port of the metering bin, and the plowshare mixer starts metering at low speed. Make the spiral of the spiral feeding component run at a frequency of 15Hz to 50Hz for high-speed metering until the discharge volume reaches 95% to 99.5% of the target metering volume. Then make the spiral of the spiral feeding component run at a frequency of 3Hz to 15Hz for low-speed metering. At the same time, the solenoid valve in the mixing dust collecting component is closed, and the plowshare mixer stops running until the discharge volume reaches the target metering volume.

[0061] ④ After stopping metering for 2 seconds, close the first feed valve, and after 10 seconds, close the second feed valve to ensure that all materials are metered into the plowshare mixer.

[0062] ⑤ According to the above steps ① to ④, measure another material to be mixed. The measurement of different materials to be mixed can be carried out simultaneously;

[0063] ⑥ 30 seconds after the butterfly valve is closed, the system reads the metering report.

[0064] ⑦ After the report is statistically analyzed, the solenoid valve in the mixing and dust collection component is turned on to start mixing. When the materials are mixed evenly, sampling and testing are performed, and the data is uploaded to the system for judgment. If the requirements are met, the plow mixer automatically discharges the materials, and automatically enters the next batch of measurement after the discharge is completed. During the mixing process, the raw material bin prepares the materials for the measurement bin to meet the target weight requirements for the next measurement.

[0065] The embodiments of the present application are described in detail below.

[0066] Example 1

[0067] The schematic diagram of the mixing system structure in this embodiment is as follows Figure 5As shown, the metering components on both sides respectively meter different materials to be mixed, and the metering processes of different materials to be mixed are consistent and performed synchronously. The following is a metering process of a material to be mixed to explain the mixing process in detail, as follows:

[0068] ① Start preparing for pre-production inspection:

[0069] Confirm that the distance between the dust collecting port of the metering bin and the air cap of the metering bin is 2 cm.

[0070] The resistance percentage difference of the four buffer pads is adjusted within the range of ±1% by the load sensor.

[0071] Confirm that the mixing filter assembly is clean and free of foreign matter, and the pressure inside the mixer is 50Pa.

[0072] ② Close the solenoid valve in the mixing dust collection component;

[0073] ③Open the butterfly valve at the discharge port of the metering bin, and the plowshare mixer starts metering at low speed, so that the spiral of the spiral feeding component rotates at a frequency of 40Hz, and performs high-speed metering until the discharge volume reaches 99% (i.e. 990Kg) of the target metering volume of 1000Kg. Then the plowshare mixer stops rotating, closes the dust collection and ventilation component, and makes the spiral of the spiral feeding component rotate at a frequency of 8Hz, and performs low-speed metering until the discharge volume reaches the target metering volume.

[0074] ④ After stopping metering for 2 seconds, close the first feed valve, and after 10 seconds, close the second feed valve to ensure that all materials are metered into the plowshare mixer.

[0075] ⑤ 30 seconds after the butterfly valve is closed, the system reads the metering report.

[0076] ⑥ After the report is statistically analyzed, the solenoid valve in the mixing and dust collecting component is opened to start mixing until the materials are evenly mixed. The evenly mixed materials can be discharged from the mixer's discharge port.

[0077] Embodiments 2 to 6

[0078] The same as Example 1, except that the opening degrees of the solenoid valves in the mixing dust collecting components in Examples 2 to 6 are 10%, 20%, 40%, 80%, and 100%, respectively.

[0079] Embodiments 7 to 11

[0080] The same as Example 1, the difference is that in Examples 7 to 11, the distances between the dust collection port of the metering and harvesting component and the air permeable cap of the metering bin are 0 cm, 1 cm, 3 cm, 4 cm, and 5 cm, respectively.

[0081] Embodiments 12 to 16

[0082] The same as Example 1, except that in Examples 12 to 16, the percentage difference of the resistance values ​​of any two buffer pads is 2%, 4%, 6%, 8%, and 10%, respectively.

[0083] Examples 17 to 21

[0084] The same as Example 1, except that in Examples 17 to 21, the pressure values ​​of the pressure sensors in the mixing filtration assembly are 100Pa, 150Pa, 200Pa, 300Pa, and 400Pa, respectively.

[0085] Embodiment 24

[0086] The same as Example 1, except that in Example 24, the main shaft state of the plowshare mixer during the low-speed metering process is open.

[0087] Embodiment 23

[0088] The same as Example 1, except that in Example 23, the mixing ventilation component is in an open state during the low-speed metering process.

[0089] Metering deviation: In the process of measuring the target material, the target value of measurement is set first. In the process of measuring, the force signal is converted into an electrical signal according to the C3 precision weighing sensor configured in the weighing bin and fed back to the weighing control panel. The weighing control panel displays the target value, starting value and actual value. The absolute value of actual value minus target value is the metering deviation.

[0090]

[0091]

[0092] It can be seen from the data in the above table that the compounding method of the present application can significantly improve the measurement accuracy.

[0093] 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.

[0094] 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 one; it can be a mechanical connection, an electrical connection, or communication with each other; 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.

[0095] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0096] 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.

[0097] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A metering component, characterized in that: include: Pedestal; at least two buffer pads, the buffer pads being arranged below the base; A metering bin, the metering bin being arranged on the base; A metering sensor, which is disposed between the base and the metering bin and is used to weigh the material in the metering bin; A load sensor is disposed between the buffer pad and the base and is used to measure the load of the buffer pad.

2. The metering assembly according to claim 1, characterized in that Also includes: A metering bin air cap, which is disposed on the metering bin and is used to ventilate the metering bin; A metering bin filter assembly, which is disposed in the metering bin air cap and is used to filter the material; The metering bin dust collecting assembly is used to provide suction or back-blowing force to the metering bin air cap to promote the material to be collected by the metering bin filter assembly or to back-blow the material collected by the metering bin filter assembly into the metering bin. The metering bin dust collecting port of the metering bin dust collecting assembly is arranged opposite to the metering bin air cap, and the distance between the metering bin dust collecting port and the metering bin air cap is 1cm to 3cm.

3. A compounding system, characterized in that: It includes at least one batching device and a mixing device: The batching device comprises: Storage silos, used to store materials; The metering assembly according to any one of claims 1 to 2, wherein the metering bin in the metering assembly is connected to the storage bin; A screw feeding assembly is connected to the metering bin and the mixing device, and is used to transport the material in the metering bin to the mixing device.

4. The compounding system according to claim 3, characterized in that The mixing device comprises a mixer and a ventilating component, wherein the mixer is connected to the spiral feeding component, and the ventilating component is arranged on the mixer; The permeable component is provided with a mixing filter component and a second pressure sensor, the mixing filter component is used for filtering materials, and the second pressure sensor is used for detecting the pressure inside the mixer.

5. The compounding system according to claim 4, characterized in that The mixing device also includes a mixing dust collecting component, which is arranged opposite to the breathable component and is used to provide suction or backblowing force for the breathable component to promote the material to be collected by the mixing filter component or to backblow the material collected by the mixing filter component into the mixer. The mixing dust collecting component is provided with a solenoid valve for controlling the opening and closing of the mixing dust collecting component.

6. A compounding method implemented by using the compounding system according to any one of claims 3 to 5, characterized in that: include: Adjusting the heights of at least two cushions in the metering assembly to be substantially the same by means of a load sensor; Transport the materials to be mixed stored in the storage bin to the metering bin; The material to be mixed of a predetermined weight W is transported from the metering bin to the mixing device through the spiral feeding assembly; The materials to be mixed are mixed uniformly in the mixing device.

7. The compounding method according to claim 6, characterized in that: During the process of conveying the material to be mixed from the metering bin to the mixing device, the solenoid valve in the mixing dust collecting assembly remains closed.

8. The compounding method according to claim 6, characterized in that: The material to be mixed is transported from the metering bin to the mixing device, including a first feeding stage and a second feeding stage performed sequentially: The first feeding stage includes: causing the spiral feeding component to convey 0.95W to 0.995W of the material to be mixed into the mixing device at a frequency of 15Hz to 50Hz; The second feeding stage includes: enabling the spiral feeding component to convey the remaining material to be mixed to the mixing device at a frequency of 3 Hz to 15 Hz.

9. The compounding method according to claim 8, characterized in that: In the second feeding stage, the mixer stops running; and / or the solenoid valve in the mixing dust collecting assembly remains closed.

10. The compounding method according to claim 6, characterized in that: The mixing system comprises a first feed valve, a connecting pipeline and a second feed valve which are connected in sequence, wherein the first feed valve is connected to a screw feed assembly, and the second feed valve is connected to a mixer; within 1s to 3s after the material to be mixed of the predetermined weight W is transported from the metering bin to the mixing device, the first feed valve is closed, and within 5s to 15s, the second feed valve is closed.

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