Ring type powder fluidizing device

Abstract

The utility model discloses an embodiment of a kind of ring type powder fluidization device, comprising: tank body, multiple air blowing parts and gas source assembly, gas source assembly includes ring type air pipe and gas supply equipment;Ring type air pipe ring is arranged on the surface of tank body, and the gas supply end of ring type air pipe is connected with gas supply equipment, and multiple air outlets are sequentially provided on ring type air pipe along the length direction of pipe body, and multiple air blowing parts are connected respectively;Multiple air blowing parts ring is arranged at different positions on the surface of tank body, for providing airflow to powder in tank body from multiple directions to realize auxiliary unloading.The utility model only sends airflow to each air blowing part through this inflation passage of ring type air pipe, without providing separate air blowing passage for each air blowing part, reduces the laying of a large number of separate air blowing passages, simplifies system structure, reduces pipeline material cost and installation cost, and saves space, makes equipment layout more compact and reasonable, and structure is simple and beautiful.

Description

Technical Field

[0001] This utility model relates to the field of powder unloading technology, and in particular to a ring-shaped powder fluidization device. Background Technology

[0002] Currently, domestic manufacturers commonly use a combination of storage tank, conveying screw, and metering tank in their powder metering and conveying systems for production equipment. The specific operation involves first setting a target weight in the metering tank, then quantitatively conveying the powder from the storage tank to the metering tank via the screw. Once the target weight is reached, the metering tank is emptied completely. However, due to the inherent properties of many powders, such as high viscosity, easy agglomeration and bridging, and easy adhesion to the tank walls, the powder sometimes struggles to flow smoothly within the tank, leaving significant residue on the tank walls. This greatly affects the accuracy of powder metering, leading to quality risks in the finished products from the final production equipment. Existing patent document CN215708748U discloses a static weighing and unloading automatic control device, specifically providing a separate air-blowing channel for each air-blowing component connected to the air supply equipment. This requires laying numerous separate air-blowing channels, resulting in a complex auxiliary unloading system structure. Utility Model Content

[0003] This utility model discloses a ring-shaped powder fluidization device to solve the problem of complex structure of auxiliary feeding system in the prior art.

[0004] This utility model provides a ring-shaped powder fluidization device, including: a tank, multiple air blowing components and an air source assembly, wherein the air source assembly includes a ring-shaped air pipe and an air supply device;

[0005] The annular air pipe is arranged around the surface of the tank body, and the air supply end of the annular air pipe is connected to the air supply equipment. Multiple air outlets are arranged sequentially along the length of the pipe body and are respectively connected to multiple air blowing components.

[0006] Multiple air blowing elements are arranged in a ring at different positions on the surface of the tank to provide airflow to the powder inside the tank from multiple directions to assist in feeding.

[0007] Furthermore, a pressure regulating valve is provided between each of the air outlets and the air blowing element. The pressure regulating valve is used to adjust the opening degree to generate greater airflow resistance at the air outlets closer to the air supply end of the annular air pipe and smaller airflow resistance at the air outlets farther away from the air supply end of the annular air pipe.

[0008] Furthermore, the pressure regulating valve is located at the air inlet end of the air blowing component, and the pressure regulating valve is a one-way valve pressure regulating valve.

[0009] Furthermore, the annular air pipe is positioned above all the air blowing components.

[0010] Furthermore, the can is an inverted cone, and the height of the plurality of air blowing elements on the surface of the can decreases sequentially from top to bottom. The included angle formed by the projection of two air blowing elements at any adjacent height onto the bottom surface of the cone with the center as the vertex is equal. The air intake direction of the air blowing elements is horizontally tangent to the can, and the air intake directions of the air blowing elements are the same, so as to realize that the airflow output from the air blowing elements generates a unidirectional swirling flow in the can.

[0011] Furthermore, the gas supply device includes a gas supply channel, a pulse valve, and a gas source. One end of the gas supply channel is connected to the gas supply end of the annular gas pipe, and the other end of the gas supply channel is connected to the gas source. The pulse valve is installed on the gas supply channel and is used to provide high-pressure gas flow to the annular gas pipe by instantaneous opening and closing.

[0012] Furthermore, the gas supplied by the gas source is nitrogen.

[0013] Furthermore, the gas supply device also includes a pressure regulating filter, which is disposed on the gas supply channel and between the pulse valve and the gas source, and is used to provide a stable pressure airflow.

[0014] Furthermore, the air supply passage between the pulse valve and the pressure regulating filter includes a hose.

[0015] Furthermore, the air outlet of the annular air pipe corresponding to the air blowing component located at the upper part of the tank is positioned closer to the air supply end than that of the air blowing component located at the lower part.

[0016] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages: The air supply device of this embodiment delivers airflow to the annular air pipe, and then from the annular air pipe to the air blowing component corresponding to each air outlet, which enters the tank. The airflow is delivered to each air blowing component only through the annular air pipe, which is the air filling channel. There is no need to provide a separate air blowing channel for each air blowing component, which reduces the laying of a large number of separate air blowing channels, simplifies the system structure, reduces the cost of pipe materials and installation, and saves space, making the equipment layout more compact and reasonable, and the structure simple and beautiful. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a front view of the structure of a ring-shaped powder fluidization device provided in an embodiment of this utility model;

[0019] Figure 2 This is a right view of the structure of a ring-shaped powder fluidization device provided in an embodiment of this utility model;

[0020] Figure 3 This is a top view of the air blowing component layout structure of a ring-shaped powder fluidization device provided in this embodiment of the present utility model;

[0021] Explanation of reference numerals in the attached drawings: 1. Tank body; 2. Air blowing component; 3. Ring-shaped air pipe; 4. Air outlet; 5. Pressure regulating valve; 6. Pulse valve; 7. Pressure regulating filter; 8. Hose; 9. Air hammer; 10. Control valve; 11. Discharge port. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0026] This utility model discloses a ring-shaped powder fluidization device.

[0027] Please see Figure 1-3An embodiment of the annular powder fluidization device provided in this utility model includes: a tank 1, multiple air blowing components 2 and an air source assembly, the air source assembly including an annular air pipe 3 and an air supply device;

[0028] The annular gas pipe 3 is arranged around the surface of the tank body 1. The gas supply end of the annular gas pipe 3 is connected to the gas supply equipment. Multiple gas outlets 4 are arranged along the length of the pipe body and are connected to multiple air blowing components 2 respectively.

[0029] Multiple air blowing elements 2 are arranged in a ring at different positions on the surface of the tank 1 to provide airflow to the powder in the tank 1 from multiple directions to assist in feeding.

[0030] It is understood that, in specific implementation, the gas supply equipment of this embodiment delivers airflow to the annular air pipe 3, and then from the annular air pipe 3 to the air blowing component 2 corresponding to each air outlet 4, which then enters the tank 1. The airflow is delivered to each air blowing component 2 through only the annular air pipe 3 as the air filling channel, without the need to provide a separate air blowing channel for each air blowing component 2. This reduces the laying of a large number of separate air blowing channels, simplifies the system structure, reduces the cost of pipe materials and installation, and saves space, making the equipment layout more compact and reasonable, and the structure simple and beautiful.

[0031] In a more specific embodiment, a pressure regulating valve 5 is provided between each air outlet 4 and the air blowing component 2. The pressure regulating valve 5 is used to adjust the opening degree so that the air outlet 4 closer to the air supply end of the annular air pipe 3 generates greater airflow resistance, and the air outlet 4 farther away from the air supply end of the annular air pipe 3 generates less airflow resistance.

[0032] It is understandable that when gas is introduced from the gas supply end of the annular air pipe 3, if the proximal outlet 4, which is close to the gas supply end, is directly vented, most of the gas will be discharged from the proximal outlet due to the short distance and low airflow resistance, resulting in insufficient gas volume at the distal outlet 4. Therefore, in this specific implementation, a pressure regulating valve 5 is set. The opening of the pressure regulating valve 5 at the proximal outlet 4 is reduced to set a larger resistance, thereby limiting the gas flow. The opening of the pressure regulating valve 5 at the distal outlet 4 is increased to set a smaller resistance, ensuring that the distal outlet 4 receives sufficient gas volume. Therefore, this embodiment uses the pressure regulating valve 5 to balance the flow of each outlet 4 on the annular air pipe 3, avoiding insufficient gas volume at the distal outlet 4.

[0033] In a more specific embodiment, the pressure regulating valve 5 is disposed at the air inlet end of the air blowing component 2, and the pressure regulating valve 5 is a one-way pressure regulating valve 5.

[0034] Understandably, in practice, by setting the one-way pressure regulating valve 5 at the air inlet end of the air blowing component 2, the gas flow rate of the air blowing component 2 can be precisely controlled. At the same time, based on the one-way characteristic of the one-way pressure regulating valve 5, the powder is prevented from flowing back into the annular air pipe 3 and causing blockage.

[0035] In a more specific embodiment, an annular air pipe 3 is disposed above all the air blowing elements 2, and the annular air pipe 3 is used to supply air to the air blowing elements 2 from top to bottom.

[0036] Understandably, in practice, on the one hand, the principle of natural sedimentation due to gravity is used to effectively prevent further backflow and blockage of the annular air pipe 3. At the same time, airflow is transported along the direction of gravity to reduce frictional resistance and slow down the attenuation of airflow power. On the other hand, an air hammer 9 is installed at the bottom of the tank 1, and the annular air pipe 3 is installed at the top of the tank 1 to avoid the air hammer 9 and prevent mutual interference during operation.

[0037] In a more specific embodiment, the tank 1 is an inverted cone, and the height of multiple air blowing elements 2 on the surface of the tank 1 decreases sequentially from top to bottom. The included angle formed by the projection of two air blowing elements 2 at any adjacent height onto the bottom surface of the cone with the center of the cone as the vertex is equal. The air intake direction of the air blowing elements 2 is horizontally tangent to the tank 1, and the air intake direction of the air blowing elements 2 is the same, so as to realize that the airflow output from the air blowing elements 2 generates a unidirectional swirling flow in the tank 1.

[0038] Understandably, on the one hand, the inverted conical structure of the powder metering tank utilizes gravity guidance and the gradual change in cross-sectional area to guide the material towards the bottom discharge port 11, and breaks the arch bridge structure through the pressure of the conical surface, preventing material accumulation. On the other hand, by dispersing high and low-level air blowing components 2, the problem of fluidization dead zones or insufficient exhaust caused by the limited range of action of a single height air blowing component 2 is avoided. Furthermore, the air inlet direction of the air blowing component 2 is horizontally tangential to the tank body 1, and the air inlet direction of the air blowing component 2 is the same as the gas flow direction of the annular air pipe 3. This is mainly to make the tangential airflow form a unidirectional swirling flow along the tank wall, and to optimize the powder flow state by utilizing the centrifugal force of the swirling flow and the fluid shearing action. This design allows the airflow to move in a circular motion along the inner wall of the tank body 1. On the one hand, the centrifugal force generated by the swirling flow pushes the powder towards the center of the tank body 1, reducing the adhesion and accumulation of material on the wall surface and avoiding the formation of "dead zones". On the other hand, the tangential airflow can generate a continuous horizontal shearing force on the powder, effectively breaking the material bridging structure and enhancing the fluidization effect of the powder, which is especially suitable for powders with poor flowability.

[0039] It should be noted that the diameter of the inverted cone-shaped tank 1 is larger at the top and smaller at the bottom. When the air blowing component 2 is arranged on the surface of the tank 1, the air intake direction of the air blowing component 2 is horizontally tangent to the tank 1 and in the same direction. The equal included angle means that the input points of each airflow on the circumference are evenly distributed with the same angle difference (such as injecting an airflow every 120°). Their tangential momentum directions are consistent and there will be no angle deviation when they are superimposed, thus forming a continuous and stable unidirectional vortex. If the angle interval is not equal, the airflow input points at the bottom will be too dense or sparse, which will lead to uneven momentum distribution. The vortex may exhibit eccentricity, turbulence, or energy loss.

[0040] In a more specific embodiment, an air hammer 9 is provided at the lower part of the tank 1 and connected to a control valve 10, which is controlled by a pulse. It is understood that, in practice, the air hammer 9 generates high-frequency mechanical impact in the powder metering tank via compressed air, effectively breaking up clumps of powder formed by gravity, static electricity, or viscosity within the tank, eliminating bridging above the discharge port 11, and the continuous impact force keeps the material layer loose and uniform, preventing localized compaction and ensuring smooth material discharge.

[0041] In a more specific embodiment, the air blowing component 2 includes an internal threaded nozzle, one end of which is horizontally and tangentially welded to the tank body 1, and the other end is threadedly connected to the start-up check valve.

[0042] In a more specific embodiment, the air blowing element 2 adopts a multi-layered staggered layout design, with one element per layer. The horizontal height spacing between adjacent layers is controlled at 150-200mm to ensure that the airflow coverage areas of each air blowing element 2 can be interconnected. The number of air blowing elements 2 is set at equal intervals according to the height of the cone; for example, a cone with a height of 900-1000mm can be configured with 4 air blowing elements 2. All air blowing elements 2 are uniformly oriented clockwise or counterclockwise, with the specific direction determined according to the discharge direction of the bottom pneumatic acceleration chamber, ensuring that the airflow is consistent with the discharge direction. This design allows the gas ejected from each air blowing element 2 to fluidize the powder downwards along the tank wall. With the limited 200mm spacing, each layer of airflow can cover the adjacent height of the tank wall area, forming a continuous purging and fluidization effect, ultimately facilitating the smooth discharge of powder from the discharge port 11, effectively improving the discharge efficiency and stability.

[0043] In a more specific embodiment, such as Figure 3 As shown, the air blowing elements 2 corresponding to adjacent air outlets 4 on the annular air pipe 3 are arranged at 120° intervals. Considering that the gas blown out by each air blowing element 2 has a buffer diffusion area, and all air blowing elements 2 start almost simultaneously, even if the pressure can be adjusted independently, if the distance between the air outlets 4 is too close, the airflows are prone to mutual collision and cancellation of the effect. Therefore, the 120° interval layout not only ensures uniform purging coverage around the tank 1, but also avoids mutual interference of the airflows of adjacent air blowing elements 2 during the diffusion process, so that each airflow can fully exert its fluidization and arch-breaking effect on the powder, thereby improving the overall efficiency of the blowing system.

[0044] In a more specific embodiment, the air supply end of the air blowing component 2 is connected to the air outlet 4 of the annular air pipe 3 via a thin tube, the diameter of which is smaller than that of the annular air pipe 3. It is understood that, in specific implementation, the smaller diameter of the thin tube compared to the annular air pipe 3 creates a pressure difference at the connection point using the throttling principle of fluid mechanics. This significantly increases the flow velocity of the gas entering the thin tube from the annular air pipe 3, allowing the high-speed airflow to quickly reach the air blowing component 2, enhancing the impact and fluidization effect on the powder. Simultaneously, the pressure drop generated by the change in pipe diameter prevents excessive gas diffusion and pressure loss within the annular air pipe 3, ensuring that each air blowing component 2 receives sufficient power and achieves precise and controllable ventilation.

[0045] In a more specific embodiment, the gas supply device includes a gas supply channel, a pulse valve 6, and a gas source. One end of the gas supply channel is connected to the gas supply end of the annular gas pipe 3, and the other end of the gas supply channel is connected to the gas source. The pulse valve 6 is installed on the gas supply channel and is used to provide high-pressure gas flow to the annular gas pipe 3 by instantaneous opening and closing.

[0046] Understandably, in practice, a large volume of air is introduced into the annular air pipe 3 via the pulse valve 6 for fluidization, and then impacts the powder through the blowing component 2. The instantaneous airflow can be precisely controlled by adjusting the pulse frequency, width, and pressure of the pulse valve 6. The impact force of the pulse airflow is used to quickly destroy the powder bridging structure, enhance the fluidization effect, and cause the powder on the wall to fall off. This is especially suitable for unloading scenarios of highly viscous or easily agglomerated powders.

[0047] In a more specific embodiment, the pulse valve 6 includes a valve and a pulse controller, which controls the opening and closing of the valve 10 to provide an instantaneous large airflow.

[0048] In a more specific embodiment, the gas supply device further includes a pressure regulating filter 7, which is disposed on the gas supply channel and between the pulse valve 6 and the gas source. The pressure regulating filter 7 is used to provide a stable airflow.

[0049] Understandably, in practical implementation, the pulse valve 6 needs to operate under specific and stable pressure to produce the required spray intensity and duration. The air source is generally compressed gas, and the gas pressure of compressed gas usually fluctuates. Excessive pressure will impact the internal diaphragm, piston, or valve core of the pulse valve 6, accelerating their wear or even causing them to rupture directly. Excessive pressure may cause the pulse valve 6 to fail to open or close properly. By placing the pressure regulating filter 7 between the pulse valve 6 and the air source, the pressure can be stabilized at the set value, such as 0.4 MPa, after the air source outputs gas. This avoids the air flow consistency during pulse air supply affected by air source pressure fluctuations, and can also filter out impurities to reduce wear on components such as the pulse valve 6 and the blowing component 2, effectively extending the service life of the equipment and reducing maintenance costs.

[0050] In a more specific embodiment, the air supply passage between the pulse valve 6 and the pressure regulating filter 7 is provided by an air-assisted hose 8.

[0051] Understandably, during implementation, the pulse valve 6 generates very severe mechanical shocks and vibrations at the moment of opening and closing. If a rigid pipe (such as a steel or copper pipe) is used for direct connection, these shocks and vibrations will be transmitted directly to the pressure regulating filter 7 and its precision components (such as the diaphragm of the pressure regulating valve 5, the fixing structure of the filter element, and the pressure gauge) without any buffering. Long-term operation can lead to loosening, wear, and fatigue damage of the internal components of the pressure regulating filter 7, and may even cause leaks at the joints or damage to the pressure gauge. In this embodiment, a flexible hose 8 is installed between the pulse valve 6 and the pressure regulating filter 7. The hose 8 has a certain degree of elasticity and flexibility, which can effectively absorb and attenuate the shock waves and vibrations generated by the operation of the pulse valve 6, acting as a "shock absorber" to protect the upstream pressure regulating filter 7 from damage and extend its service life and stability.

[0052] In a more specific embodiment, the gas output from the gas source includes nitrogen. It is understood that, in specific implementation, the gas introduced into tank 1 is nitrogen. Due to its stable chemical properties and non-combustible inertness, nitrogen can effectively replace oxygen in the tank, eliminating the risk of combustion and explosion of flammable and explosive powders. At the same time, it isolates the material from contact with oxygen, preventing the deterioration of easily oxidized materials. Moreover, industrial nitrogen is dry and has low humidity, which can prevent powder from clumping due to moisture and ensure smooth material discharge. In addition, nitrogen is non-toxic, odorless, and leaves no residue, meeting the safety standards of the food, pharmaceutical and other industries. Combined with its stable pressure characteristics, the gas flow rate can be precisely controlled to optimize the fluidization effect and unloading efficiency.

[0053] In a more specific embodiment, the air blowing element 2 located at the upper part of the tank 1 is positioned closer to the air supply end than the air outlet 4 of the annular air pipe 3 corresponding to the lower air blowing element 2.

[0054] Understandably, in practice, if the lower part of tank 1 is ventilated first, and the lower air nozzle is suddenly ventilated and pressurized in an attempt to break the arch or fluidize, the compressed air will instantly seek the path of least resistance to release. Since the upper part is at normal pressure (or negative pressure), a large amount of compressed air may carry powder upwards and backflush, spraying out from the upper exhaust port, feed port, or even poorly sealed areas, causing dust to fly, material loss, environmental pollution, and safety hazards. In this embodiment, when the pulse-type gas is input into the annular air pipe 3, the air blowing component 2 located at the upper part of tank 1 is ventilated first, and the lower air blowing component 2 is ventilated later. The upper part is ventilated first to create a positive pressure environment slightly higher than atmospheric pressure inside the tank, eliminating the reverse airflow driving force caused by the internal and external pressure difference when the feed port 11 is opened, and avoiding the risk of powder spraying and backflush.

[0055] The annular powder fluidization device provided in this embodiment of the utility model is applied to a powder metering tank, and its specific working principle is as follows:

[0056] First, the target weight of powder is added to the powder metering tank; the discharge port 11 of the tank 1 is connected to the production equipment, and the production equipment is equipped with a receiving device; the production equipment is configured with negative pressure power to provide conveying power; during the powder feeding process of the metering tank 1, the pulse nitrogen charging program is started, and the rate of powder weight reduction is observed; the final data is obtained, and the curve of the weight of the tank 1 before and after powder conveying is obtained; compared with the weight of the remaining powder after conveying in a conventional metering tank without this type of annular powder fluidization device, the weight of the remaining powder in the powder metering tank after conveying is close to 0 kg based on the annular powder fluidization device used in this embodiment.

[0057] Therefore, the annular powder fluidization device provided in this embodiment of the utility model fluidizes the conical part of the tank to break the arch and minimize the residue in the tank, thereby meeting the powder percentage requirements of the product and improving product quality.

[0058] It should be noted that the terms used to describe positional relationships in the above examples and accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. The various embodiments of this utility model described above are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A ring-shaped powder fluidization device, characterized in that, include: The tank, multiple air blowing components, and an air source assembly, wherein the air source assembly includes a ring-shaped air pipe and an air supply device; The annular air pipe is arranged around the surface of the tank body, and the air supply end of the annular air pipe is connected to the air supply equipment. Multiple air outlets are arranged sequentially along the length of the pipe body and are respectively connected to multiple air blowing components. Multiple air blowing components are arranged in a ring at different positions on the surface of the tank to provide airflow to the powder inside the tank from multiple directions to assist in feeding. A pressure regulating valve is provided between each of the air outlets and the air blowing element. The pressure regulating valve is used to adjust the opening degree so that the air outlet closer to the air supply end of the annular air pipe generates greater airflow resistance, and the air outlet farther away from the air supply end of the annular air pipe generates less airflow resistance.

2. The annular powder fluidization device according to claim 1, characterized in that, The pressure regulating valve is located at the air inlet end of the air blowing component, and the pressure regulating valve is a one-way valve.

3. The annular powder fluidization device according to claim 2, characterized in that, The annular air tube is positioned above all the air blowing components.

4. The annular powder fluidization device according to claim 3, characterized in that, The canister is an inverted cone. The height of the multiple air blowing components on the surface of the canister decreases sequentially from top to bottom. The included angle formed by the projection of two air blowing components at any adjacent height onto the bottom surface of the cone with the center as the vertex is equal. The air intake direction of the air blowing components is horizontally tangent to the canister and the air intake direction of the air blowing components is the same, which is used to make the airflow output from the air blowing components generate a unidirectional swirling flow in the canister.

5. The annular powder fluidization device according to claim 1, characterized in that, The gas supply equipment includes a gas supply channel, a pulse valve, and a gas source. One end of the gas supply channel is connected to the gas supply end of the annular gas pipe, and the other end of the gas supply channel is connected to the gas source. The pulse valve is installed on the gas supply channel and is used to provide high-pressure gas flow to the annular gas pipe by instantaneous opening and closing.

6. The annular powder fluidization device according to claim 5, characterized in that, The gas supplied by the gas source is nitrogen.

7. A ring-shaped powder fluidization device according to claim 5 or 6, characterized in that, The gas supply equipment also includes a pressure regulating filter, which is disposed on the gas supply channel and between the pulse valve and the gas source. The pressure regulating filter is used to provide a stable airflow.

8. The annular powder fluidization device according to claim 7, characterized in that, The air supply passage between the pulse valve and the pressure regulating filter includes a hose.

9. A ring-shaped powder fluidization device according to claim 8, characterized in that, The air outlet of the annular air pipe corresponding to the air blowing component located at the upper part of the tank is closer to the air supply end than that of the air blowing component located at the lower part.

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