A high-efficiency mixing device for powder silos

Abstract

This invention discloses a high-efficiency mixing device for a powder silo. The high-efficiency mixing device for a powder silo includes: a frame, a drive unit mounted on the upper end of the frame, and a mixing unit for guiding and mixing powder materials installed inside the frame; the drive unit drives the mixing unit to operate; the frame includes a conical tank, the upper opening of which is a feed inlet, a tank cover fixedly and sealed at the feed inlet, and a discharge outlet for discharging material from the internal cavity of the conical tank at the lower end, a vibration assembly installed at the discharge outlet; the drive unit includes a first drive assembly and a second drive assembly. The high-efficiency mixing device for a powder silo provided by this invention guides the powder material located above it through a virtual cone formed by a triangular plate rotating at high speed, thereby causing the material to slide downwards along the inner wall of the conical tank from the area between the virtual cone and the conical tank.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment technology, and in particular to a high-efficiency mixing device for powder silos. Background Technology

[0002] The batching silo consists of two parts: an upper, vertical cube or cylinder for storing powder, and a lower, truncated pyramid or cone for discharging the powder. The cone's taper directly affects the smoothness of material discharge; therefore, the horizontal angle of the cone silo should be greater than 50° to prevent material stagnation. The main structure of the powder silo is generally constructed of reinforced concrete or a steel silo (usually using 10mm thick steel plates). Some silos also have steel plates, cast stone, or other wear-resistant materials that reduce frictional resistance lined to the inner wall. The conical discharge port is often made of steel and can be used in conjunction with vibration and arch-breaking devices. For storing materials with high moisture content, such as fine ore, concentrate, quicklime, and fuel, a conical metal structure silo with a 70° inclination angle should be used. For storing drier materials such as limestone powder, quicklime, dry-quenched coke powder, return ore, and blast furnace ash, a conical metal structure or semi-metal structure silo with a trough angle of not less than 60° can be used.

[0003] Existing technology discloses a mixing device for a powder silo, publication number CN219701614U, belonging to the field of mixing technology. This mixing device for the powder silo includes a mixing shaft and multiple mixing blade bodies. The mixing shaft body has a flat-bottomed notch. Multiple mixing blade bodies are sequentially and spaced along the axial direction on the shaft body. Each mixing blade body includes a central sleeve and multiple blades fixed to the outer peripheral wall of the central sleeve. The multiple blades are circumferentially spaced along the outer peripheral wall of the central sleeve, and any one blade is positioned at an acute angle to the horizontal direction during operation, so that the blades can apply a downward inclined force to the material. The mixing device for a powder silo provided in this application has a flattened shaft body design, which guides and positions the mixing blade bodies during loading and unloading, better preventing loosening of the mixing blade bodies. The blades can also apply a downward inclined force to the material, accelerating the feeding speed.

[0004] In the aforementioned type of existing technology, the mixing device can only be used for mixing materials. After the mixing operation is completed, the material is fed into the feeding process. Due to the conical structure of the silo, the material flow rate at the top of the feeding port is faster than at the edge, resulting in uneven material descent speed within the silo. In addition, the powder material itself has adhesive forces, which can easily lead to bridging and rat holes during the feeding process.

[0005] Therefore, it is necessary to provide a high-efficiency mixing device for powder silos to solve the above-mentioned technical problems. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a high-efficiency stirring device for powder silos that can better guide the feeding process of powder materials.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A high-efficiency mixing device for a powder silo includes: a frame, a drive unit installed at the upper end of the frame, and a mixing unit installed inside the frame for guiding and mixing the powder, wherein the drive unit drives the mixing unit to work; The frame includes a conical tank, the upper opening of which is a feed inlet, a tank cover is fixedly and sealed at the feed inlet, and the lower end of the conical tank is a discharge outlet for discharging materials from the internal cavity of the conical tank, a vibration component is installed at the discharge outlet; The drive unit includes a first drive component and a second drive component, both of which are fixedly installed on the upper end of the can lid; The mixing unit includes a first rotating shaft and a second rotating shaft, which are coaxial. The second rotating shaft is located inside the first rotating shaft and the two are rotatably connected. The first driving component drives the first rotating shaft located on the outside to rotate, and the second driving component drives the second rotating shaft located on the inside to rotate. A vertically arranged triangular piece is fixedly installed on the outer wall of the first rotating shaft. A stirring paddle is fixedly installed at the lower end of the triangular piece. The lower end of the stirring paddle is fixedly installed on the outer wall of the first rotating shaft. The stirring paddle and the sides of the triangular piece are both arc-shaped, so that the material can be pushed out in an upward oblique direction when rotating. When the triangular piece rotates at high speed around the first axis, it forms a virtual cone, and the side of the virtual cone guides the material to move towards the inner wall of the conical tank.

[0008] Preferably, the first drive assembly includes a first motor, which is fixedly mounted on a structural plate. The structural plate is fixedly mounted on the upper end of the can lid. A first rotating shaft passes through the can lid and is rotatably connected to it. A drive wheel is fixedly mounted on the upper part of the first rotating shaft of the can lid. A belt is sleeved on the drive wheel. The other end of the belt is sleeved on the output end of the first motor. The first motor drives the drive wheel to rotate through the belt.

[0009] Preferably, the second drive assembly includes a second motor, which is fixedly mounted on the upper end of the can lid. The second rotating shaft follows the first rotating shaft through the can lid and extends out from the upper end of the first rotating shaft. The output end of the second motor is fixedly connected to the second rotating shaft.

[0010] Preferably, a vertical spiral rod is fixedly installed at the lower end of the second rotating shaft. The spiral rod is located in the discharge port at the lower end of the conical tank. When the spiral rod rotates, it can push some of the material in the discharge port upward. After the spiral rod stops rotating, the material is discharged from the area between the outer periphery of the spiral rod and the inner wall of the discharge port.

[0011] Preferably, the vibration assembly includes a vibrating cylinder that extends vertically through the cylinder. A sealing cover is rotatably installed at the upper opening of the vibrating cylinder. The sealing cover is annular, and the inner diameter of the through hole in the middle of the sealing cover is the same as the outer diameter of the discharge port. The sealing cover is threadedly connected to the discharge port.

[0012] Preferably, a vertical elastic plate is fixedly installed inside the vibrating cylinder. The elastic plate extends radially inward and passes through a pre-set groove on the discharge port, and the elastic plate can slide up and down in the groove.

[0013] Preferably, a paddle is fixedly installed at the lower end of the second rotating shaft. In the vertical direction, the elastic plates on the inner wall of the vibrating cylinder are arc-shaped and two plates are symmetrically arranged. The paddle is located between the two elastic plates. When the paddle moves down between the two elastic plates, the paddle rotates and drives the elastic plates to vibrate at high frequency.

[0014] Preferably, a mounting frame is fixedly installed between the triangular plate and the stirring paddle. The mounting frame is a cross-shaped plate, and the width of the mounting frame is greater than the width of the triangular plate and the stirring paddle to improve the pushing efficiency of the triangular plate on the material during the falling process. Four cross-shaped mounting frames are respectively provided for the triangular plate and the stirring paddle.

[0015] Preferably, the can lid has a feed inlet, and a funnel for feeding is fixedly installed on the feed inlet. The funnel is inclined in the vertical direction, and its axis meets the axes of the first rotating shaft and the second rotating shaft at the triangular plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can guide the powder material located on the upper part of the virtual cone formed by the triangular plate in the high-speed rotation state, so that the material slides down the inner wall of the conical tank from the area between the virtual cone and the conical tank, avoiding the material falling directly into the discharge port of the conical tank and reducing the risk of the discharge port on the back of the conical tank being blocked. (2) The present invention improves mixing efficiency by lifting the material when the triangular plate and the stirring paddle rotate, so that the material is thrown into the conical tank cavity for mixing during the stirring process; (3) The vibration component of the present invention can be used when the discharge port is blocked. It uses the second rotating shaft of the device itself as the drive shaft to drive the paddle to vibrate the elastic sheet, thereby breaking the adhesion between powder particles and breaking the accumulation phenomenon. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the high-efficiency stirring device for the powder silo provided by the present invention; Figure 2 A first-view cross-sectional view of the high-efficiency stirring device for powder silos provided by the present invention. Figure 3 A cross-sectional view from a second perspective of the high-efficiency stirring device for the powder silo provided by the present invention; Figure 4 A schematic diagram of the mixing section of the high-efficiency stirring device for powder silos provided by the present invention; Figure 5 A schematic diagram of the working principle of the mixing section of the high-efficiency stirring device for powder silos provided by the present invention; Figure 6 A schematic diagram of the external trajectory of powder material in the powder silo under the operating state of the high-efficiency stirring device provided by the present invention; Figure 7 This is a schematic diagram illustrating the falling of powder materials in a conical tank in existing technology. Figure 8 for Figure 4 Enlarged view of a local structure in the image; Figure 9 for Figure 2 Enlarged view of point A in the middle.

[0018] The corresponding names of the reference numerals in the attached drawings are as follows: 10, frame; 11, conical tank; 111, discharge port; 112, tank cover; 113, feed port; 114, funnel; 12, vibrating cylinder; 121, sealing cover; 122, elastic plate; 20, drive unit; 21, first motor; 211, drive wheel; 212, belt; 213, protective cover; 22, second motor; 30, mixing unit; 31, first rotating shaft; 311, mounting bracket; 312, triangular piece; 313, stirring paddle; 32, second rotating shaft; 321, screw rod; 33, lever. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0020] Example 1: like Figure 1 As shown, the high-efficiency mixing device for powder silos provided by the present invention includes: a frame 10, a drive unit 20, and a mixing unit 30. The frame 10 is the supporting and housing part of the device. The drive unit 20 is installed at its upper end, and the mixing unit 30 is installed inside. The mixing unit 30 is used to guide and mix the powder. The drive unit 20 is connected to the mixing unit 30 to drive the mixing unit 30 to work.

[0021] Please refer to Figure 1-4 As shown, the frame 10 includes three parts: a conical tank 11, a tank cover 112, and a vibration assembly.

[0022] The conical tank 11 is a conical container with openings at both the top and bottom. Its interior is a cavity for containing powder materials. A tank cover 112 is fixedly installed and sealed at the opening at the top of the conical tank 11. The tank cover 112 has an inlet 111 for feeding powder into the conical tank 11. The conical contraction part at the bottom of the conical tank 11 is integrally formed for discharging the material after stirring inside the conical tank 11 through the outlet 111. The outlet 111 is a cylindrical tube that runs through the top and bottom, with the upper end connected to the cavity inside the conical tank 11.

[0023] The can lid 112 has a shaft hole in the center for the first rotating shaft 31 and the second rotating shaft 32 to pass through. The can lid 112 also has a feeding port for material input. A funnel 114 for feeding material into the conical can 11 is fixedly installed at the feeding port of the can lid 112. The funnel 114 is inclined in the vertical direction, that is, the axis of the funnel 114 has a certain inclination angle relative to the vertical direction, such as 60°. The axis of the funnel 114 intersects with the axis of the first rotating shaft 31 and the axis of the second rotating shaft 32 at the position of the triangular plate 312. The powder input from the funnel 114 can fall into the rotation area of ​​the triangular plate 312, improving the efficiency of the material being captured and pushed by the triangular plate 312, thereby achieving the effect of stirring and mixing once during the material addition process.

[0024] like Figure 5-6 As shown, the vibration assembly includes a vibrating cylinder 12, which is a cylindrical structure that runs vertically through the cylinder. An internal channel runs vertically through the cylinder and is connected to a discharge port 111 for material discharge. A sealing cover 121 is rotatably mounted at the upper opening of the vibrating cylinder 12. The sealing cover 121 is an annular component, with its outer ring rotatably connected to the upper opening of the vibrating cylinder 12. A through hole is provided in the middle of the sealing cover 121, the inner diameter of which is the same as the outer diameter of the discharge port 111. The sealing cover 121 is fitted onto the outside of the discharge port 111 through its central through hole, and the sealing cover 121 and the discharge port 111 are connected by threads. Specifically, an internal thread is provided on the inner wall of the central through hole of the sealing cover 121, and a matching external thread is provided on the outer wall of the discharge port 111. By rotating the sealing cover 121, the vibrating cylinder 12 can move vertically along the discharge port 111, thereby adjusting the installation position of the vibrating cylinder 12 relative to the conical tank 11.

[0025] An elastic plate 122 is fixedly installed on the inner arm of the vibrating cylinder 12. The elastic plate 122 is a metal sheet with a certain elasticity and rigidity, such as spring steel SUS304. It is set vertically and extends radially inward from the inner wall of the vibrating cylinder 12. That is, the elastic plate 122 protrudes inward along the radial direction of the vibrating cylinder 12. Correspondingly, a sliding groove extending vertically is preset on the side wall of the discharge port 111. The elastic plate 122 passes through the sliding groove and extends into the internal channel of the discharge port 111. The width of the elastic plate 122 is smaller than the width of the sliding groove. When the sealing cover 121 rotates and drives the vibrating cylinder 12 to move up and down along the discharge port 111, the elastic plate 122 moves up and down synchronously with the vibrating cylinder 12 in the sliding groove.

[0026] In this embodiment, two elastic plates 122 are symmetrically arranged on the inner wall of the vibrating cylinder 12. The two elastic plates 122 are arranged opposite each other in the circumferential direction of the vibrating cylinder 12. The part of each elastic plate 122 inside the vibrating cylinder 12 is curved in an arc shape, and the curved directions of the two elastic plates 122 are opposite, so that a channel that narrows in the middle is formed between the two elastic plates 122.

[0027] On the other hand, such as Figure 1-2 As shown, the drive unit 20 is disposed at the upper end of the can cover 112. The drive unit 20 includes a first drive assembly and a second drive assembly. The first drive assembly is used to drive the first rotating shaft 31 in the mixing unit 30 to rotate, and the second drive assembly is used to drive the second rotating shaft 32 in the mixing unit 30 to rotate.

[0028] The first drive assembly includes three parts: a first motor 21, a drive wheel 211, and a belt 212.

[0029] A structural plate for supporting the first motor 21 is fixedly installed on the upper end of the can lid 112. The first motor 21 is fixedly installed on the structural plate, and a drive pulley is fixedly installed on the output end of the first motor 21. The drive wheel 211 is fixedly installed on the part of the first rotating shaft 31 located above the can lid 112. The drive wheel 211 and the first rotating shaft 31 are circumferentially fixed by a key connection. The belt 212 is sleeved between the drive wheel 211 and the drive pulley at the output end of the first motor 21. The first motor 21 transmits power to the drive wheel 211 through the belt 212, thereby driving the first rotating shaft 31 to rotate. A protective cover 213 is also fixedly installed on the structural plate at the upper end of the can lid 112. The protective cover 213 covers the drive wheel 211, the belt 212 and the drive pulley of the first motor 21, and plays a role in safety protection.

[0030] The second drive component includes a second motor 22.

[0031] The second motor 22 is also fixedly installed on the upper end of the can lid 112. The output end of the second motor 22 is fixedly connected to the upper end of the second rotating shaft 32. For example, the output shaft of the second motor 22 can be connected to the upper end of the second rotating shaft 32 through a coupling to realize power transmission. The second rotating shaft 32 is located inside the first rotating shaft 31. The two are coaxially arranged and rotated to each other. That is, the first rotating shaft 31 is a hollow shaft structure with a central through hole extending axially inside. The second rotating shaft 32 passes through the central through hole. A bearing or bushing is provided between the outer wall of the second rotating shaft 32 and the inner wall of the first rotating shaft 31 so that the first rotating shaft 31 and the second rotating shaft 32 can rotate relatively independently without interfering with each other. The upper end of the second rotating shaft 32 passes through the upper end of the first rotating shaft 31 and is connected to the output end of the second motor 22.

[0032] Please refer to Figure 1-4 The first rotating shaft 31 and the second rotating shaft 32 are components of the mixing section 30. Both the first rotating shaft 31 and the second rotating shaft 32 are arranged in the vertical direction, and the lower end of the second rotating shaft 32 extends from the lower end of the first rotating shaft 31.

[0033] A mounting bracket 311 is fixedly installed on the outer wall of the first rotating shaft 31. The mounting bracket 311 is located in the internal cavity of the conical tank 11. The mounting bracket 311 is a cross-shaped plate arranged in the horizontal direction, with four ends extending outward. The width of the mounting bracket 311 is greater than the width of the triangular piece 312 and the stirring paddle 313. The wider mounting bracket 311 can increase the contact area with the material, making it easier for the material to be intercepted and guided by the mounting bracket 311 into the functional area of ​​the triangular piece 312.

[0034] Triangular pieces 312 are fixedly installed on the upper side of the mounting bracket 311 and are arranged vertically. The shape of the triangular pieces 312 is roughly triangular, and its base is fixedly connected to the mounting bracket 311. One side of the triangular pieces 312 faces the axis of the first rotating shaft 31, and the other side faces the inner wall of the conical tank 11. The side of the triangular pieces 312 is an arc-shaped edge, that is, the side of the triangular pieces 312 facing the inner wall of the conical tank 11 is an arc-shaped surface. There are four triangular pieces 312, which are respectively arranged at the four ends of the cross-shaped mounting bracket 311.

[0035] The stirring paddle 313 is fixedly installed on the lower side of the mounting frame 311, forming a "7" shape and also arranged vertically. The upper end of the stirring paddle 313 is fixedly connected to the mounting frame 311, and the lower end of the stirring paddle 313 is fixedly installed on the outer wall of the first rotating shaft 31. The side of the stirring paddle 313 facing the inner wall of the conical tank 11 is an arc-shaped surface. There are four stirring paddles 313, which are respectively set at the four ends of the cross-shaped mounting frame 311. The stirring paddle 313 and the triangular piece 312 correspond one-to-one on the upper and lower sides of the mounting frame 311.

[0036] like Figure 5 As shown, the arc-shaped sides of the triangular piece 312 and the stirring paddle 313 can push the material out in an upward direction when rotating with the first rotating shaft 31. Specifically, the bending direction of the arc-shaped sides of the triangular piece 312 and the stirring paddle 313 allows the arc-shaped working surface in contact with the material to apply an upward component force to the material when they rotate at high speed with the first rotating shaft 31, causing the material to be pushed upward along the arc-shaped side. When multiple materials accumulate inside the conical tank 11, the height of the material exceeds the height of the stirring paddle 313 and the triangular piece 312. At this time, the arc-shaped sides of the triangular piece 312 and the stirring paddle 313 push the material to move upward and are scattered in the cavity at the upper end of the conical tank 11 for mixing.

[0037] Please see Figure 6-7 As shown, the triangular piece 312 rotates at high speed under the drive of the first rotating shaft 31, for example, at a speed of 100~1000 rpm. Since the triangular piece 312 is triangular in shape and vertically arranged, the four triangular pieces 312 form a virtual cone when rotating at high speed. The side of the virtual cone has a certain tilt angle relative to the vertical direction. During the rotation, it can push and impact the material in space towards the inner wall of the conical tank 11. There is a gap between the virtual cone and the material cylinder. The material slides down the inner wall of the conical tank 11 through the gap, instead of gathering at the discharge port 111 in the middle of the conical tank 11. Figure 6 As shown, the contact position between the outer edge of the material and the inner wall of the conical tank 11 is circular, which means that when the material is discharged from the conical tank 11, the movement speed of each part is consistent, and the material is discharged evenly.

[0038] Conversely, such as Figure 7 The diagram shows the free fall of powder material inside the conical tank 11. Because the discharge port 111 of the conical tank 11 is located at the lower center, the material placed directly above the discharge port 111 discharges at a fast speed, while the material at the edges discharges at a slow speed. The contact position between the outer edge of the material and the inner wall of the conical tank 11 is shaped as follows: Figure 7 As shown, this results in a velocity difference between powder particles, which easily leads to powder particles getting stuck. This is the root cause of the mouse hole and bridge phenomena.

[0039] Example 2: like Figure 5-7 As shown, a spiral rod 321 and a paddle 33 are fixedly installed at the lower end of the second rotating shaft 32. The spiral rod 321 is a rod-shaped structure with spiral blades and is located in the discharge port 111 at the lower end of the conical tank 11. The upper end of the spiral rod 321 is fixedly connected to the lower end of the second rotating shaft 32 and is coaxially arranged with the second rotating shaft 32.

[0040] When the screw 321 rotates, its spiral blades exert an upward thrust on the material in the discharge port 111, pushing the material upward and returning it to the conical tank 11 to participate in the mixing again. Compared with the prior art, the discharge port 111 is a dead zone for mixing in the prior art. The addition of the screw 321 can lift the material in the discharge port 111, thereby preventing the material falling into the discharge port 111 from not being able to participate in the mixing. At the same time, the screw 321 can break the bridge formed by the material in this part and prevent blockage. When the screw 321 stops rotating, the material is no longer subjected to an upward thrust, and the valve is opened. The material can be discharged naturally from the annular area between the outer periphery of the screw 321 and the inner wall of the discharge port 111 by gravity.

[0041] like Figure 9 As shown, the paddle 33 is fixedly installed at the lower end of the screw rod 321. It has a rectangular plate structure. When the second rotating shaft 32 rotates, the paddle 33 rotates synchronously with the second rotating shaft 32 and the screw rod 321. In the vertical direction, the position of the paddle 33 corresponds to the position of the two elastic plates 122 on the inner wall of the vibrating cylinder 12. When the vibrating cylinder 12 moves downward along the discharge port 111 through the sealing cover 121, the two elastic plates 122 move downward with the vibrating cylinder 12, so that the paddle 33 is located in the narrowed channel formed by the arc-shaped curved part of the two elastic plates 122. The second motor 2 is started separately. 2. Drive the second rotating shaft 32 to rotate. At the same time, the second rotating shaft 32 drives the paddle 33 to rotate with it. The end of the paddle 33 sequentially paddles the two elastic plates 122, causing the elastic plates 122 to undergo elastic deformation and generate vibration when rebounding. The vibration is transmitted through the vibrating cylinder 12 to the material in the discharge port 111 and the conical tank 11, thereby breaking the adhesion and bridging structure between the powders and promoting the smooth falling of the material. After the feeding is completed or the blockage problem of the discharge port 111 is solved, rotate the sealing cover 121 to drive the vibrating cylinder 12 to move upward, so that the paddle 33 is disengaged from the area between the two elastic plates 122, and the elastic plates 122 stop vibrating.

[0042] Example 3: During rapid mixing and feeding, various powder materials are poured into the funnel 114. The powder materials fall along the axis of the funnel 114 to the area where the triangular piece 312 is located. Guided by the virtual cone formed by the high-speed rotation of the triangular piece 312, the materials move towards the inner wall of the conical tank 11. During this process, the materials are mixed by impacting and scattering them through the triangular piece 312. Then, the materials fall from the area between the virtual cone and the inner wall of the conical tank 11, and finally slide down along the inner wall of the conical tank 11 and are discharged from the outlet 111. Repeating this process multiple times can improve the uniformity of the powder materials, thereby achieving a rapid and uniform mixing effect.

[0043] In use, powder material is first fed into the conical tank 11 through the funnel 114. After entering the conical tank 11 from the funnel 114, the powder falls to the area where the triangular piece 312 is located due to the inclined setting of the funnel 114. The first motor 21 and the second motor 22 are started. The first motor 21 drives the drive wheel 211 to rotate through the belt 212. The drive wheel 211 drives the first rotating shaft 31 to rotate. The first rotating shaft 31 drives the mounting frame 311, the triangular piece 312 and the stirring paddle 313 to rotate synchronously. The four triangular pieces 312 and the four stirring paddles 313 rotate at high speed around the first rotating shaft 31, which disperses the powder material falling inside the conical tank 11 and mixes the powder material in the conical tank 11. During the mixing process, the arc-shaped sides of the triangular pieces 312 and the arc-shaped sides of the stirring paddles 313 interact with each other. The material is pushed upwards at an angle, creating a convection circulation inside the conical tank 11. Simultaneously, the side of the virtual cone formed by the high-speed rotation of the triangular plate 312 guides the material during its descent, pushing it towards the inner wall of the conical tank 11. This makes the material more evenly distributed in the radial direction of the conical tank 11, preventing the material from directly falling and accumulating near the discharge port 111. The second motor 22 drives the second rotating shaft 32 to rotate, which in turn drives the screw rod 321 and the paddle 33 to rotate synchronously. When the screw rod 321 rotates in the discharge port 111, it applies an upward push to the material in the discharge port 111, pushing the material upwards from the discharge port 111 and returning it to the inside of the conical tank 11 to participate in the mixing again, preventing the material from accumulating and bridging at the discharge port 111.

[0044] When material needs to be discharged, the first motor 21 is turned off, and the first rotating shaft 31 stops rotating. The second motor 22 can be turned off or kept on as needed. When the second motor 22 is turned off, the screw rod 321 stops rotating, and the material is no longer subjected to upward thrust. The material is discharged downward from the annular area between the outer periphery of the screw rod 321 and the inner wall of the discharge port 111 by gravity. If material bridging or rat hole phenomena occur during the discharge process, the second motor 22 can be turned on to rotate the paddle 33. At the same time, ensure that the vibrating cylinder 12 is positioned so that the paddle is rotated. Positioned between the two elastic plates 122, the lever 33 periodically actuates the elastic plates 122 during rotation, causing them to vibrate. The vibration frequency is related to the rotation speed of the second motor 22. The vibration is transmitted to the material inside the discharge port 111 and the lower part of the conical tank 11, disrupting the bridging structure of the powder and allowing the material to fall smoothly. By adjusting the up and down position of the vibrating cylinder 12, it is possible to control whether the lever 33 interferes with the elastic plates 122, thereby controlling the opening and closing of the vibration function.

[0045] Working principle: Through the coaxial setting and independent drive of the first rotating shaft 31 and the second rotating shaft 32, the stirring function and the material feeding assistance function are independently controlled and work together. The first rotating shaft 31 drives the triangular piece 312 to rotate to form a virtual cone and a stirring paddle 313 to fully guide the powder. The second rotating shaft 32 drives the screw rod 321 to move the material at the discharge port 111 into the conical tank 11 and re-participate in the stirring and mixing. At the same time, the second rotating shaft 32 drives the paddle 33 to cooperate with the elastic piece 122 to realize high-frequency vibration to assist the material feeding.

[0046] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. A high-efficiency mixing device for a powder silo, characterized in that, include: A frame (10) is provided with a drive unit (20) installed on the upper end of the frame (10). A mixing unit (30) for guiding and stirring powder is installed inside the frame (10). The drive unit (20) drives the mixing unit (30) to work. The frame (10) includes a conical tank (11), the upper opening of the conical tank (11) is a feed inlet (113), a tank cover (112) is fixed and sealed at the feed inlet (113), the lower end of the conical tank (11) is a discharge outlet (111) for discharging materials from the internal cavity of the conical tank (11), and a vibration component is installed at the discharge outlet (111); The drive unit (20) includes a first drive assembly and a second drive assembly, both of which are fixedly installed on the upper end of the can lid (112); The mixing section (30) includes a first rotating shaft (31) and a second rotating shaft (32). The first rotating shaft (31) and the second rotating shaft (32) are coaxial. The second rotating shaft (32) is located inside the first rotating shaft (31). The two are rotatably connected. The first driving component drives the first rotating shaft (31) located on the outside to rotate. The second driving component drives the second rotating shaft (32) located on the inside to rotate. A vertically arranged triangular piece (312) is fixedly installed on the outer wall of the first rotating shaft (31). A stirring paddle (313) is fixedly installed at the lower end of the triangular piece (312). The lower end of the stirring paddle (313) is fixedly installed on the outer wall of the first rotating shaft (31). The sides of the stirring paddle (313) and the triangular piece (312) are both arc-shaped. When rotating, the material can be pushed out in an oblique upward direction. When the triangular piece (312) rotates at high speed around the first rotating shaft (31), it forms a virtual cone. The side of the virtual cone guides the material to move towards the inner wall of the conical tank (11).

2. The high-efficiency stirring device for the powder silo according to claim 1, characterized in that, The first drive assembly includes a first motor (21), which is fixedly mounted on a structural plate. The structural plate is fixedly mounted on the upper end of the can lid (112). The first rotating shaft (31) passes through the can lid (112) and is rotatably connected to it. A drive wheel (211) is fixedly mounted on the upper part of the first rotating shaft (31) located on the can lid (112). A belt (212) is sleeved on the drive wheel (211). The other end of the belt (212) is sleeved on the output end of the first motor (21). The first motor (21) drives the drive wheel (211) to rotate through the belt (212).

3. The high-efficiency stirring device for the powder silo according to claim 1, characterized in that, The second drive assembly includes a second motor (22), which is fixedly mounted on the upper end of the can lid (112). The second rotating shaft (32) follows the first rotating shaft (31) through the can lid (112). The second rotating shaft (32) passes out from the upper end of the first rotating shaft (31). The output end of the second motor (22) is fixedly connected to the second rotating shaft (32).

4. The high-efficiency stirring device for the powder silo according to claim 3, characterized in that, A vertical spiral rod (321) is fixedly installed at the lower end of the second rotating shaft (32). The spiral rod (321) is located in the discharge port (111) at the lower end of the conical tank (11). When the spiral rod (321) rotates, it can push some of the material in the discharge port (111) upward. After the spiral rod (321) stops rotating, the material is discharged from the area between the outer periphery of the spiral rod (321) and the inner wall of the discharge port (111).

5. The high-efficiency stirring device for the powder silo according to claim 4, characterized in that, The vibration assembly includes a vibrating cylinder (12), which is vertically continuous. A sealing cover (121) is rotatably installed at the upper opening of the vibrating cylinder (12). The sealing cover (121) is annular, and the inner diameter of the through hole in the middle of the sealing cover (121) is the same as the outer diameter of the discharge port (111). The sealing cover (121) is threadedly connected to the discharge port (111).

6. The high-efficiency stirring device for the powder silo according to claim 5, characterized in that, The vibrating cylinder (12) has a vertical elastic plate (122) fixedly installed inside. The elastic plate (122) extends radially inward and passes through a pre-set groove on the discharge port (111). The elastic plate (122) can slide up and down in the groove.

7. The high-efficiency stirring device for the powder silo according to claim 6, characterized in that, The lower end of the second rotating shaft (32) is fixedly installed with a paddle (33). In the vertical direction, the elastic plate (122) on the inner wall of the vibrating cylinder (12) is arc-shaped and two pieces are symmetrically arranged. The paddle (33) is located between the two elastic plates (122). When the paddle (33) moves down to between the two elastic plates (122), the paddle (33) rotates and drives the elastic plate (122) to vibrate at high frequency.

8. The high-efficiency stirring device for the powder silo according to claim 1, characterized in that, A mounting bracket (311) is fixedly installed between the triangular piece (312) and the stirring paddle (313). The mounting bracket (311) is a cross-shaped plate. The width of the mounting bracket (311) is greater than the width of the triangular piece (312) and the stirring paddle (313) to improve the pushing efficiency of the triangular piece (312) for the material during the falling process. Four cross-shaped mounting brackets (311) are respectively provided for the triangular piece (312) and the stirring paddle (313).

9. The high-efficiency stirring device for the powder silo according to claim 1, characterized in that, The can lid (112) has a feed inlet (113), and a funnel (114) for feeding is fixedly installed on the feed inlet (113). The funnel (114) is inclined in the vertical direction, and its axis meets the axis of the first rotating shaft (31) and the second rotating shaft (32) at the triangular piece (312).

Images