Superfine boron carbide powder discharging control system

Abstract

The invention relates to the technical field of powder conveying equipment, in particular to a superfine boron carbide powder discharging control system which comprises a storage module and a conveying module, the storage module comprises a storage bin and a weighing bin, a feeding device is installed between the storage bin and the weighing bin, an anti-blocking assembly is installed in the weighing bin, and the conveying module is connected with the storage bin. The conveying module comprises a conveying pipe set and a power source installed on the conveying pipe set, the conveying pipe set comprises a horizontally-installed first conveying pipeline and a vertically-installed second conveying pipeline, a connecting bent pipe is installed between the first conveying pipeline and the second conveying pipeline, and a wear-resisting base plate is installed on the inner side of the connecting bent pipe; a driving mechanism used for driving the wear-resisting base plate to rotate is installed outside the connecting bent pipe and used for changing the contact position of the wear-resisting base plate and the materials, and through the design of the feeding device and the weighing bin, the discharging amount of the whole discharging system can be more stable and accurate; and the problem of large weighing error caused by blockage during material conveying or a time delay phenomenon during weighing is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of powder conveying equipment, and in particular to an ultrafine boron carbide powder discharging control system. Background Art

[0002] In the field of high-tech materials, ultrafine boron carbide powder has shown broad application prospects in many key fields such as cutting tools, ceramic materials, wear-resistant coatings and nuclear industry due to its unique physical and chemical properties. However, the efficient and precise processing and transportation of this powder has always been a technical challenge in the industry.

[0003] At present, traditional powder discharge control systems often face many challenges when handling ultrafine boron carbide powder. On the one hand, due to the ultrafine characteristics of the powder, it is particularly difficult to accurately control the discharge amount, which directly affects the stability of the subsequent production process and product quality. On the other hand, pneumatic conveying, as a common way of powder conveying, has the advantages of high efficiency and speed, but during the conveying process, the problem of powder wear on the bends of the conveying pipeline has been difficult to solve, which not only shortens the service life of the conveying pipeline, but also increases production costs.

[0004] In addition, ultrafine boron carbide powder is prone to breakage due to impact during transportation. This is because the powder particles are small and are easily broken by external impact and extrusion, thus affecting the use effect and performance of the powder.

[0005] Most traditional powder discharging control systems use a single metering device, which makes it difficult to achieve high-precision control of the discharge amount of ultrafine boron carbide powder. This inaccuracy not only affects the quality of the product and the consistency of production, but may also lead to waste of raw materials and increased costs. In addition, during pneumatic conveying, ultrafine powders are prone to high-speed impact and friction at the bends of the conveying pipeline due to their high fluidity and interaction between particles, which not only accelerates the wear of the pipeline and shortens its service life, but may also cause powder particles to break due to the impact force, affecting the performance of the final product. For example, CN108002037B discloses a fully automatic PVC powder centralized negative pressure feeding system, which realizes automatic feeding of powder materials through the cooperation of a centralized storage device, an automatic material distribution device and a negative pressure device. However, this system is mainly aimed at PVC powder, and its applicability to special materials such as ultrafine boron carbide powder needs to be further verified.

[0006] For another example, CN109110505A discloses an automatic masterbatch feeding and batching equipment and a batching and batching process, which realizes automatic feeding, weighing and mixing of masterbatch through the coordination of raw material feeding device, weight-added batching device, collecting device and control device. Although the system has a high degree of automation and batching accuracy, when processing ultrafine boron carbide powder, it is also necessary to solve key problems such as accurate control of discharge volume, reduction of conveying pipeline wear and avoidance of material breakage.

[0007] In summary, the existing technology still has problems such as inaccurate discharge volume, severe wear of the conveying pipeline and material breakage when processing ultrafine boron carbide powder. Therefore, developing an ultrafine boron carbide powder discharge control system that can overcome the above defects is of great significance for improving production efficiency, ensuring product quality and reducing production costs. Summary of the invention

[0008] In order to solve the above problems, the embodiment of the present invention provides an ultrafine boron carbide powder discharging control system, which can make the material discharge amount more accurate through multi-module cooperation. At the same time, it can also reduce the wear of the material on the turning part of the conveying pipeline when pneumatic conveying is used, thereby extending the service life of the conveying pipeline. At the same time, it can also avoid the phenomenon of material breakage due to installation when conveying boron carbide powder.

[0009] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a superfine boron carbide powder discharging control system, comprising a storage module and a conveying module, the storage module comprising a storage bin and a weighing bin, a feeding device is arranged between the storage bin and the weighing bin, an anti-blocking component is arranged in the weighing bin, the conveying module comprises a conveying pipe group and a power source arranged on the conveying pipe group, the conveying pipe group comprises a horizontally installed conveying pipe 1 and a vertically installed conveying pipe 2, a connecting elbow is arranged between the conveying pipe 1 and the conveying pipe 2, a wear-resistant pad is arranged on the inner side of the connecting elbow, and a driving mechanism for driving the wear-resistant pad to rotate is arranged on the outside of the connecting elbow, so as to change the contact position between the wear-resistant pad and the material.

[0010] As a further improvement of the above technical solution:

[0011] The wear-resistant pad includes a base plate that fits the inner wall of the connecting elbow, a wear-resistant patch is arranged on the inner side of the base plate, an extension plate is arranged on the outer wall, and a groove corresponding to the position of the extension plate is opened on the side wall of the connecting elbow.

[0012] A limiting recess for placing a substrate is provided on the inner wall of the connecting elbow, and the substrate includes a positioning ring plate located in the middle of the limiting recess, and multiple dynamic ring plates with adjustable spacing from the positioning ring plate are provided on both sides of the positioning ring plate, and a telescopic spring is provided between the positioning ring plate and the dynamic ring plate.

[0013] The inner side walls of the positioning ring plate and the dynamic ring plate are both provided with support plates for installing wear-resistant patches. The support plates are designed to be inclined along the conveying direction of the material. One end of the support plate is connected to the dynamic ring plate, and the other end extends above the end of the next support plate.

[0014] The driving mechanism comprises a motor, a driving gear is arranged at the output end of the motor, a driven gear disc meshingly connected with the driving gear is arranged at the end of the extension plate, and a avoiding groove is arranged at the connection between the driving gear and the driven gear disc on the channel.

[0015] The feeding device comprises a shell, a conveying auger is arranged in the shell, a feeding pipe connected to the storage bin is arranged at one end of the shell, and the other end is connected to the weighing bin, and a pulse blowing pipe is arranged on the side wall of the feeding pipe.

[0016] The shell is designed to be inclined and extends outward from one end connected to the material storage bin, with the height gradually increasing.

[0017] The anti-blocking component includes a sealing cover body arranged on the upper part of the weighing bin, a transmission shaft extending into the weighing bin is arranged in the middle part of the sealing cover body, a feeding screw is arranged at the lower part of the transmission shaft, a cleaning device is arranged in the middle part of the transmission shaft, and a driving source connected to the transmission shaft is arranged on the sealing cover body.

[0018] The cleaning device comprises a first scraper and a second scraper arranged on both sides of the transmission shaft, and mounting seats for mounting the first scraper and the second scraper are respectively arranged on the upper part of the transmission shaft.

[0019] The first scraper and the second scraper are both connected to the mounting seat via a positioning rod, and the working ends of the first scraper and the second scraper are both inclined and fit with the inner wall of the weighing bin.

[0020] The beneficial effects of the embodiment of the present invention are as follows: the ultrafine boron carbide powder discharging control system comprises a storage module and a conveying module, the storage module comprises a storage bin and a weighing bin, a feeding device is installed between the storage bin and the weighing bin, an anti-blocking component is installed in the weighing bin, the conveying module comprises a conveying pipe group and a power source installed on the conveying pipe group, the conveying pipe group comprises a horizontally installed conveying pipe 1 and a vertically installed conveying pipe 2, a connecting elbow is installed between the conveying pipe 1 and the conveying pipe 2, a wear-resistant pad is installed on the inner side of the connecting elbow, a driving mechanism for driving the wear-resistant pad to rotate is installed on the outer side of the connecting elbow, and the contact position between the wear-resistant pad and the material is changed. Through the design of the feeding device and the weighing bin, the discharging amount of the entire discharging system can be made more stable and accurate, avoiding the problem of large weighing error caused by blockage during material transportation or delay during weighing;

[0021] The change of the wear-resistant pad towards the material impact position and the change of the scouring position of the inner wall of the wear-resistant pad can effectively extend the service life of the entire elbow. At the same time, the wear-resistant pad and the connecting elbow are detachably connected. After the entire wear-resistant pad is worn, it can be disassembled and replaced as a whole. Compared with the existing method of adding a wear-resistant layer to the elbow, it has a longer service life and can be replaced each time without stopping, which will not affect normal operation. This operation method is simple and can improve work efficiency. Compared with the method of reducing the wear degree of the connecting elbow by adding a storage chamber at the turning point of the connecting elbow to accumulate materials, it can avoid collision between materials, especially boron carbide powder, which is hard but easily broken after collision, and can better ensure that the material is broken during the transportation process.

[0022] The cleaning device includes a first scraper and a second scraper installed on both sides of the transmission shaft. The upper part of the transmission shaft is provided with mounting seats for installing the first scraper and the second scraper respectively. The design of the two mounting seats can drive the first scraper and the second scraper to rotate along with the transmission shaft, and clean the material on the inner wall of the symmetrical weight bin to prevent the material from sticking and causing a decrease in discharge accuracy, which will also affect the next material weighing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0024] Figure 2 is a cross-sectional view of the wear-resistant pad in Example 1;

[0025] Figure 3 for Figure 2 Schematic diagram of the enlarged structure in;

[0026] Figure 4 This is a schematic diagram of the structure of the connecting elbow in Example 1;

[0027] Figure 5 is a schematic structural diagram of the substrate in Example 1;

[0028] Figure 6 This is a schematic diagram of the structure of the weighing bin in Example 1;

[0029] Figure 7 is a cross-sectional view of the weighing bin in Example 1;

[0030] Figure 8 This is a schematic diagram of the structure of the buffer sphere in Example 2;

[0031] Fig. 9 is the installation position of the buffer sphere in Example 2;

[0032] Fig.10 This is a schematic diagram of the structure of the buffer sphere in Example 3;

[0033] Fig.11 This is the installation position of the buffer sphere in Example 3.

[0034] In the figure: 1. Storage bin; 2. Weighing bin; 3. Power source; 4. Conveying pipeline 1; 5. Conveying pipeline 2; 6. Connecting elbow; 7. Wear-resistant pad; 8. Base plate; 9. Extension plate; 10. Groove; 11. Motor; 12. Driving gear; 13. Driven gear plate; 14. Avoidance groove; 15. Limiting concave; 16. Positioning ring plate; 17. Dynamic ring plate; 18. Support plate; 19. Shell; 20. Feeding pipe; 21. Pulse blowing pipe; 22. Sealing cover; 23. Transmission shaft; 24. Feeding screw; 25. Driving source; 26. First scraper; 27. Second scraper; 28. Mounting seat; 29. ​​Positioning rod; 30. Wear-resistant patch; 31. Telescopic spring; 32. Buffer ball. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0036] Example 1

[0037] like Figure 1-7As shown, the ultrafine boron carbide powder discharging control system of this embodiment includes a storage module and a conveying module, the storage module includes a storage bin 1 and a weighing bin 2, a feeding device is installed between the storage bin 1 and the weighing bin 2, an anti-blocking component is installed in the weighing bin 2, the conveying module includes a conveying pipe group and a power source 3 installed on the conveying pipe group, the power source 3 adopts a compressor, and drives the material to move in the conveying pipe group by providing compressed air, and finally completes the conveying and transfer of the material, the conveying pipe group includes a horizontally installed conveying pipe 1 4 and a vertically installed conveying pipe 2 5, a connecting elbow 6 is installed between the conveying pipe 1 4 and the conveying pipe 2 5, a wear-resistant pad 7 is installed on the inner side of the connecting elbow 6, and a driving mechanism for driving the wear-resistant pad 7 to rotate is installed on the outside of the connecting elbow 6, which is used to change the contact position between the wear-resistant pad 7 and the material, so as to avoid excessive wear of the inner wall of the connecting elbow 6 due to the scouring of the powder during the conveying process;

[0038] It should be noted that conveying pipeline 1 4 and conveying pipeline 2 5 do not refer to two pipelines alone, but represent pipelines with two installation directions in the entire discharging control system, which are used to convey and change the conveying direction and discharging height of materials. When using this discharging control system, the weighing bin 2 is used to weigh the material conveying volume. After reaching the set weight, a signal is sent to the control center, and the feeding device stops material conveying. Then the weighing bin 2 is opened, and the material inside is discharged for standby or packaging. The entire discharging system can accurately control the discharging weight. At the same time, the use of pipeline transportation can also enhance the transportation efficiency and avoid the occurrence of material blockage.

[0039] The wear-resistant pad 7 includes a base plate 8 which is fitted with the inner wall of the connecting elbow 6, a wear-resistant patch 30 is installed on the inner wall of the base plate 8, an extension plate 9 extending into the side wall of the connecting elbow 6 is provided on the outer wall of the wear-resistant pad 7, a groove 10 corresponding to the position of the extension plate 9 is opened on the side wall of the connecting elbow 6, after the wear-resistant pad 7 is fitted with the inner wall of the connecting elbow 6, the extension plate 9 is located in the groove 10, and an opening connected to the groove 10 is opened on the outer wall of the connecting elbow 6, and the driving mechanism drives the wear-resistant pad 7 to rotate after being connected to the extension plate 9 through the opening, and the wear-resistant pad 7 includes fitting with the inner wall of the connecting elbow 6, which can seal the opening position to prevent material leakage.

[0040] A limiting recess 15 for placing the substrate 8 is provided on the inner side wall of the connecting elbow 6. The substrate 8 includes a positioning ring plate 16 located in the middle of the limiting recess 15. Both sides of the positioning ring plate 16 are provided with a plurality of dynamic ring plates 17 with adjustable spacing from the positioning ring plate 16. The positioning ring plate 16 and the dynamic ring plate 17 are connected by a telescopic spring 31. Positioning columns for fixing the telescopic springs are provided on the side walls of the positioning ring plate 16 and the dynamic ring plate 17. The width of the positioning column gradually decreases from bottom to top, so as to ensure that the telescopic spring 31 always bends toward the side wall of the connecting elbow 6 during rotation. The two adjacent dynamic ring plates 17 are also connected by the telescopic spring 31. The two dynamic ring plates 17 near the ends of the limiting recess 15 are always in contact with the side wall of the limiting recess 15. A trapezoidal groove is provided on the side wall of the limiting recess 15. A trapezoidal guide block clamped with the trapezoidal groove is provided on the side wall of the dynamic ring plate 17 in contact with it. The trapezoidal groove and the trapezoidal guide block can be guided during the rotation of the substrate 8.

[0041] During production, the extension plate 9 is coaxially distributed with the positioning ring plate 16, which is convenient for the driving mechanism to drive the entire base plate 8 to rotate when operating, thereby realizing the change of the wear-resistant pad 7 towards the material impact position. By changing the position where the inner wall of the wear-resistant pad 7 is scoured, the service life of the entire elbow can be effectively extended. At the same time, the wear-resistant pad 7 and the connecting elbow 6 are detachably connected. After the entire wear-resistant pad 7 is worn, it can be disassembled and replaced as a whole. Compared with the existing method of adding a wear-resistant layer to the elbow, it has a longer service life, and each replacement can be achieved without stopping the machine, and will not affect normal operation. This operation method is simple and can improve work efficiency. Compared with the method of reducing the degree of wear of the connecting elbow 6 by adding a storage chamber at the turning point of the connecting elbow 6 to pile up materials, it can avoid mutual collision between materials, especially boron carbide powder, which is hard but easily broken after collision. It can better ensure that the material is broken during the transportation process.

[0042] A support plate 18 for installing a wear-resistant patch 30 is installed on the inner side walls of the positioning ring plate 16 and the dynamic ring plate 17. The support plate 18 is designed to be inclined along the conveying direction of the material. One end of the support plate 18 is connected to the dynamic ring plate 17, and the other end extends to the top of the end of the next support plate 18. A pad is installed at the connection between the two support plates 18. The function of the pad is to support the connection between the two support plates 18 to prevent the support plates 18 from shaking significantly under the high-speed scouring of the material. The pad is made of wear-resistant rubber. When the material scours the support plate 18, the pad will be slightly deformed after being squeezed by the scouring force of the material, absorbing the squeezing force caused by the scouring of the material, avoiding the material from having a hard collision with the side wall of the pipeline during the conveying process, and reducing the wear on the pipeline. Especially for boron carbide powder, which is hard but easily broken, this design can protect the material, avoid the phenomenon of breakage and damage of the material during transportation, and improve the overall quality of the material.

[0043] The driving mechanism includes a motor 11, a driving gear 12 is installed at the output end of the motor 11, a driven gear 13 meshing with the driving gear 12 is provided at the end of the extension plate 9, and a avoidance groove 14 is opened at the connection between the driving gear 12 and the driven gear 13 on the groove 10. Through the design of the driving gear 12 and the driven gear 13, the rotation angle of the base plate 8 can be accurately controlled to avoid the phenomenon of overlapping of the contact area between the base plate 8 and the material due to excessive rotation or insufficient rotation angle.

[0044] The feeding device includes a shell 19, in which a conveying auger is installed. A feeding pipe 20 connected to the storage bin 1 is installed at one end of the shell 19, and the other end is connected to the weighing bin 2. A pulse blowing pipe 21 is installed on the side wall of the feeding pipe 20. The pulse blowing pipe 21 is installed at an angle to avoid material blockage in the feeding pipe 21. The conveying auger is driven by a motor, and the start and stop of the motor are used to control the start and end of the feeding operation. At the same time, the material conveying speed can be controlled by controlling the speed of the motor. When the mass of the material in the weighing bin 2 is close to the set value, the feeding speed will gradually slow down to avoid overweight and to ensure the most accurate material conveying amount.

[0045] The shell 19 is designed to be inclined and extends outward from one end connected to the storage bin 1, with the height gradually increasing. The inclined design of the shell 19 facilitates further control of the material conveying accuracy and prevents the material from slipping from the shell 1 into the weighing bin 2, resulting in errors in material weighing.

[0046] The anti-blocking component includes a sealing cover body 22 installed on the upper part of the weighing bin 2, a transmission shaft 23 extending into the weighing bin 2 is installed in the middle of the sealing cover body 22, a discharge screw 24 located in the discharge port of the weighing bin 2 is installed at the lower part of the transmission shaft 23, a cleaning device is provided in the middle of the transmission shaft 23, a driving source 25 connected to the transmission shaft 23 is installed on the sealing cover body 22, the driving source 25 adopts a motor, and the transmission shaft 23 is driven to rotate by the driving source 25. When rotating, the discharge screw 24 will stir the material at the discharge port of the weighing bin 2 to avoid accumulation of the material when it comes out, which affects the discharge speed.

[0047] The cleaning device includes a first scraper 26 and a second scraper 27 installed on both sides of the transmission shaft 23. The upper part of the transmission shaft 23 is provided with mounting seats 28 for mounting the first scraper 26 and the second scraper 27 respectively. The design of the two mounting seats 28 can drive the first scraper 27 and the second scraper 28 to rotate along with the transmission shaft 23, so as to clean the material on the inner wall of the symmetrical weighing bin 2, so as to prevent the material from sticking, resulting in a decrease in the accuracy of the discharge quantity, and also affecting the weighing operation of the next material.

[0048] The first scraper 26 and the second scraper 27 are connected to the mounting seat 28 through the positioning rod 29. The working ends of the first scraper 26 and the second scraper 27 are inclined and fit with the inner wall of the weighing bin 2. The weighing bin 2 is a conical color agent. The design of the two scrapers can strengthen the symmetrical segmented cleaning of the inner wall of the weighing bin 2 and enhance the cleaning effect of the side wall.

[0049] Example 2

[0050] The same as Example 1 is not repeated here, except that Figure 8-9: Regarding the change of the wear-resistant components in the connecting elbow 6, in this embodiment, the wear-resistant pad 7 is connected to the inner wall of the connecting elbow 6, that is, a layer of wear-resistant ceramic plate is laid on the inner wall of the connecting elbow 6 by adopting traditional technology to prevent the connecting elbow 6 from being directly washed by the material. A buffer module is installed in the middle position of the connecting elbow 6, that is, at the inflection point of the material falling. The buffer module includes a support rod installed along the radial direction of the connecting elbow 6, and a slewing bearing is installed in the middle of the support rod. The center of the slewing bearing coincides with the center of the connecting elbow 6. A buffer ball 32 coaxially distributed with the slewing bearing is installed on the outside of the slewing bearing. The inner wall of the buffer ball and the slewing bearing are connected by a transverse Support connection, the outer wall of the buffer sphere is paved with a wear-resistant ceramic plate. Through the design of the buffer sphere, when the material is conveyed, it will first contact the buffer sphere. When colliding, the buffer sphere changes the impact force of the collision into sliding friction through the rotation of the buffer sphere, thereby playing a force unloading effect on the material. After unloading, the material contacts the inner wall of the connecting elbow 6, which will greatly reduce the erosion of the connection appearance, and finally achieve the purpose of extending the service life of the connecting elbow 6. Compared with Example 1, the advantage of this embodiment is that there is no need to make major changes to the interior of the connecting elbow, and it has a better use effect when continuous conveying is required.

[0051] Example 3

[0052] The same as in Examples 1 and 2 are not repeated here, except that: Figure 10-11 As shown: In Example 2, a buffer ball is added to the middle part of the connecting elbow 6 to prevent the material from directly scouring the inner wall of the connecting elbow 6. However, during use, the design of the buffer ball will reduce the channel for the material to pass through, which will affect the material transportation efficiency to a certain extent. In order to improve this problem, we adjust the position of the entire buffer module, install the support rod at the connection between the connecting elbow 6 and the conveying pipeline 1, and the support rod forms an angle of 15-30 degrees with the center line of the conveying pipeline 4, that is, the support rod is installed at an angle. Compared with the comparative document 2, this installation method will increase the passing diameter of the material, but it will also simultaneously weaken the buffering effect on the impact force of the material. Therefore, it is necessary to install the wear-resistant pad 7 disclosed in Example 1 on the inner side of the connecting elbow 6, and enhance the wear resistance of the inner side of the connecting elbow 6 through the wear-resistant pad 7. The cooperation of the two can improve the service life of the entire conveying pipe group and reduce the time occupied by equipment replacement and maintenance.

[0053] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0056] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An ultrafine boron carbide powder discharging control system, comprising a storage module and a conveying module, characterized in that: The storage module comprises a material storage bin (1) and a weighing bin (2), a feeding device is provided between the material storage bin (1) and the weighing bin (2), and an anti-blocking component is provided in the weighing bin (2); The conveying module comprises a conveying pipe group and a power source (3) arranged on the conveying pipe group, the conveying pipe group comprises a horizontally installed conveying pipe 1 (4) and a vertically installed conveying pipe 2 (5), a connecting elbow (6) is arranged between the conveying pipe 1 (4) and the conveying pipe 2 (5), a wear-resistant pad (7) is arranged on the inner side of the connecting elbow (6), and a driving mechanism for driving the wear-resistant pad (7) to rotate is arranged on the outside of the connecting elbow (6), so as to change the contact position between the wear-resistant pad (7) and the material.

2. The ultrafine boron carbide powder discharging control system according to claim 1, characterized in that: The wear-resistant pad (7) comprises a base plate (8) which is in contact with the inner wall of the connecting elbow (6); a wear-resistant patch (30) is arranged on the inner side of the base plate (8); an extension plate (9) is arranged on the outer wall; and a groove (10) corresponding to the position of the extension plate (9) is opened on the side wall of the connecting elbow (6).

3. The ultrafine boron carbide powder discharging control system according to claim 2, characterized in that: A limiting recess (15) for placing a base plate (8) is provided on the inner side wall of the connecting elbow (6); the base plate (8) comprises a positioning ring plate (16) located in the middle of the limiting recess (15); a plurality of dynamic ring plates (17) with adjustable spacing from the positioning ring plate (16) are provided on both sides of the positioning ring plate (16); and a telescopic spring (31) is provided between the positioning ring plate (16) and the dynamic ring plate (17).

4. The ultrafine boron carbide powder discharging control system according to claim 3, characterized in that: A support plate (18) for mounting a wear-resistant patch (30) is provided on the inner side walls of the positioning ring plate (16) and the dynamic ring plate (17). The support plate (18) is designed to be inclined along the conveying direction of the material. One end of the support plate (18) is connected to the dynamic ring plate (17), and the other end extends to above the end of the next support plate (18).

5. The ultrafine boron carbide powder discharging control system according to claim 3, characterized in that: The driving mechanism comprises a motor (11), the output end of the motor (11) is provided with a driving gear (12), the end of the extension plate (9) is provided with a driven toothed disc (13) meshingly connected with the driving gear (12), and a avoiding groove (14) is provided on the groove (10) at the connection between the driving gear (12) and the driven toothed disc (13).

6. The ultrafine boron carbide powder discharging control system according to claim 1, characterized in that: The feeding device comprises a shell (19), a conveying auger is arranged in the shell (19), one end of the shell (19) is provided with a feeding pipe (20) connected to the storage bin (1), and the other end is connected to the weighing bin (2), and a pulse blowing pipe (21) is arranged on the side wall of the feeding pipe (20).

7. The ultrafine boron carbide powder discharging control system according to claim 6, characterized in that: The shell (19) is designed to be inclined and extends outward from one end connected to the storage bin (1), with the height gradually increasing.

8. The ultrafine boron carbide powder discharging control system according to claim 1, characterized in that: The anti-blocking component comprises a sealing cover body (22) arranged on the upper part of the weighing bin (2), a transmission shaft (23) extending into the weighing bin (2) is arranged in the middle of the sealing cover body (22), a feeding screw (24) is arranged at the lower part of the transmission shaft (23), a cleaning device is arranged in the middle of the transmission shaft (23), and a driving source (25) connected to the transmission shaft (23) is arranged on the sealing cover body (22).

9. The ultrafine boron carbide powder discharging control system according to claim 8, characterized in that: The cleaning device comprises a first scraper (26) and a second scraper (27) arranged on both sides of a transmission shaft (23); a mounting seat (28) for mounting the first scraper (26) and the second scraper (27) is respectively arranged on the upper part of the transmission shaft (23).

10. The ultrafine boron carbide powder discharging control system according to claim 9, characterized in that: The first scraper (26) and the second scraper (27) are both connected to the mounting seat (28) via a positioning rod (29); the operating ends of the first scraper (26) and the second scraper (27) are both inclined and fit against the inner wall of the weighing bin (2).

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