Multi-outlet adjustable abrasive flow tool for 3D printing valve body runner polishing

Abstract

The invention is applicable to the technical field of abrasive flow machining, and provides a multi-outlet adjustable abrasive flow tool for 3D printing valve runner polishing, which comprises a base, a storage bin, a feeding pipe, a feeding motor, a tool plug, a valve, a tool plug, a tool pressing plate, a tool pressing plate shaft, a tool pressing plate gear, a gear motor, an abrasive recovery tank, a recovery pipe and a recovery motor. The storage bin is fixed to the base, one end of the feeding pipe is connected with the storage bin, the other end of the feeding pipe is provided with a plurality of outlets, and the outlets are connected with the valve body abrasive inlets through tool plugs. A feeding motor drives grinding materials to flow, a tool plug blocks an outlet of a non-machining runner of a valve body, a tool pressing plate is installed in a cavity of the valve body and fixed to a tool pressing plate shaft, the tool pressing plate shaft is connected with a tool pressing plate gear, and a gear motor drives the gear to operate so as to adjust the pressing plate. The problems that abrasive particles are not evenly distributed in a complex runner, and machining dead angles exist can be solved, the quality of the inner wall of the valve body and the machining efficiency are improved, the sealing performance and the adaptability are good, and the tool assembling and disassembling steps are reduced.

Description

Technical Field

[0001] This invention belongs to the field of abrasive flow processing technology, and particularly relates to a multi-outlet adjustable abrasive flow tooling for polishing the flow channels of 3D printed valve bodies. Background Technology

[0002] Hydraulic valves, as key control components of hydraulic systems, are widely used in engineering machinery, aerospace, automotive, and petrochemical equipment. Their internal flow channels contain complex structures such as intersecting holes, curved passages, and irregularly shaped cavities. The quality of the flow channel machining directly affects the hydraulic valve's sealing performance, flow control, and service life. If burrs, sharp angles, or excessive roughness exist on the flow channel surface, it can lead to increased flow resistance, leakage, or even jamming of moving parts, affecting system stability. However, existing machining methods have the following problems: Traditional machining methods such as drilling, milling, and grinding can basically form the flow channel, but they cannot guarantee the uniformity and consistency of the surface processing of complex internal flow channels. This can easily lead to uneven surface roughness, resulting in increased hydraulic oil flow resistance. At the junctions and bends of complex internal flow channels, traditional processing methods can easily create machining dead zones, making it impossible to effectively treat these areas and directly affecting the performance of the valve body. Traditional processing methods are prone to producing defects on the surface of the flow channel, which can reduce the service life and operational reliability of the valve body. Although abrasive flow machining technology can process complex internal cavities and intersecting holes, existing abrasive flow tooling is not optimized for the complex flow channels of valve bodies, resulting in uneven distribution of abrasive flow velocity and pressure within the flow channels, with some areas being over-processed and others under-processed, leading to poor machining results. Existing abrasive flow tooling requires frequent tooling loading and unloading to switch the processing flow path when machining multi-outlet valve bodies. This operation is cumbersome, time-consuming, and prolongs the overall processing flow. Therefore, a multi-outlet adjustable abrasive flow tooling is needed for polishing the flow channels of 3D printed valve bodies to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-outlet adjustable abrasive flow tooling for polishing the flow channels of 3D printed valve bodies, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A multi-outlet adjustable abrasive flow fixture for polishing the flow channels of 3D printed valve bodies includes a base, characterized in that: it further includes a storage bin fixedly installed on the top of the base, a feed pipe with one end connected to the storage bin and the other end having multiple outlets, a feed motor fixed on the outside of the storage bin and connected to the abrasive drive inside the storage bin at its output end, a fixture plug installed one-to-one at each outlet of the feed pipe and detachably connected to the abrasive inlet of the valve body at the end away from the feed pipe, a fixture plug for sealing the non-processed flow channel outlet of the valve body, a fixture pressure plate disposed inside the cavity of the valve body, a fixture pressure plate shaft fixedly connected at one end to the fixture pressure plate, a fixture pressure plate gear sleeved and fixed at the end of the fixture pressure plate shaft away from the fixture pressure plate, a gear motor meshing with the fixture pressure plate gear and fixed on the side wall of the base or the storage bin, an abrasive recovery tank fixed on the top of the base and located below the valve body, a recovery pipe connected at one end to the bottom of the abrasive recovery tank, and a recovery motor fixed on the recovery pipe and driving the abrasive flow. The end of the recovery pipe away from the abrasive recovery tank is connected to the storage bin, and the tooling pressure plate has holes that correspond one-to-one with the holes inside the valve body cavity. The multi-outlet feed pipe, in conjunction with the tooling plug, can evenly distribute the abrasive to each processing channel, avoiding uneven abrasive distribution; the tooling plug and tooling pressure plate work together to precisely control the processing channel, eliminating the need for frequent loading and unloading of the overall tooling and reducing operation steps; the recycling system forms a closed loop, improving abrasive utilization while ensuring processing continuity.

[0005] In a further technical solution, an elastic sealing gasket is provided on the outer periphery of the tooling plug, and the tooling plug is detachably connected to the abrasive inlet of the valve body by bolts, the bolts passing through the tooling plug and engaging with the threads of the valve body; The elastic sealing gasket can fill the gap between the tooling plug and the valve body inlet, and the bolt connection can enhance the connection stability of the two. Under the dual action, it can effectively prevent the abrasive from leaking from the connection during the processing, ensure the processing pressure in the flow channel is stable, and thus improve the grinding accuracy.

[0006] A further technical solution is that the tooling plug is made of rubber, and an annular flange is provided at the end of the tooling plug away from the valve body. The outer diameter of the annular flange is larger than the inner diameter of the valve body flow channel outlet. The rubber material has good elasticity and can fit tightly against the inner wall of the flow channel outlet, improving the sealing performance; the annular flange can prevent the tooling plug from fully extending into the flow channel, facilitating subsequent loading and unloading operations, while further enhancing the sealing effect and preventing abrasive from flowing out from non-processing flow channels.

[0007] In a further technical solution, the aperture of the hole on the tooling plate is consistent with the aperture of the hole inside the valve body cavity, and the tooling plate is made of hard alloy. Consistent orifice diameters ensure precise alignment between the pressure plate holes and the valve body cavity holes, preventing abrasive flow obstruction or machining dead angles due to orifice diameter deviations. The high hardness and wear resistance of the cemented carbide material extend the service life of the tooling pressure plate while ensuring that the pressure plate is not easily deformed during adjustment, thus ensuring machining stability.

[0008] In a further technical solution, a flow regulating valve is provided at each of the multiple outlets of the feed pipe. The flow regulating valve is integrally formed with the feed pipe, and the regulating rod of the flow regulating valve extends to the outside of the feed pipe. The feed pipe outlet is equipped with a flow regulating valve, which can control the abrasive flow rate at each outlet according to the processing requirements of different flow channels, so as to achieve differentiated processing of different flow channels. It is especially suitable for valve bodies with different flow channel sizes and roughness requirements, improving tooling adaptability and processing flexibility.

[0009] In a further technical solution, the inner wall of the abrasive recovery tank is inclined, with the inclination direction being downward from the end away from the recovery pipe to the end closer to the recovery pipe, and the inclination angle being 15°-30°. The inner wall of the abrasive recovery tank is inclined. The inclined structure can guide the used abrasive to flow quickly towards the recovery pipe, avoiding the accumulation of abrasive in the recovery tank and ensuring recovery efficiency. The inclination angle of 15°-30° has been verified by multiple tests. It can ensure the flow speed of abrasive while avoiding splashing caused by excessive abrasive flow, thus balancing recovery efficiency and stability.

[0010] A further technical solution also includes a PLC controller, wherein the feeding motor, gear motor, and recycling motor are all electrically connected to the PLC controller, and the PLC controller is fixed on one side of the base; By adding a PLC controller that is electrically connected to each motor, the operating parameters of each motor (such as the speed of the feed motor, the rotation angle of the gear motor, and the speed of the recovery motor) can be preset through the PLC controller, so as to realize the automated operation of the tooling, reduce the error of manual operation, and at the same time realize the precise control of the processing process, improve the processing consistency, and is suitable for batch valve body processing scenarios.

[0011] A further technical solution is provided in the storage silo, which is equipped with a stirring assembly. The stirring assembly includes a stirring shaft and stirring blades. One end of the stirring shaft is rotatably connected to the top of the storage silo and the other end extends to the bottom of the storage silo. The stirring blades are fixed on the outer periphery of the stirring shaft. A stirring motor is also fixed on the top of the storage silo, and the output end of the stirring motor is fixedly connected to the stirring shaft. An agitation assembly is added inside the storage silo. The agitation motor drives the agitation shaft and agitation blades to rotate, which can continuously agitate the abrasive in the storage silo, prevent the abrasive from settling and stratifying due to long-term static storage, ensure uniform abrasive concentration, and thus ensure consistent processing effect after the abrasive enters the flow channel, avoiding differences in the surface roughness of the flow channel due to uneven abrasive concentration.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the feed motor provides stable power for the abrasive flow, ensuring that the abrasive enters each flow channel with uniform pressure; the gear motor drives the tooling pressure plate gear to rotate, which in turn drives the tooling pressure plate shaft and tooling pressure plate adjustment, realizing precise control of the flow channel opening and closing within the valve body cavity. The two work together to avoid uneven distribution of abrasive particles in the flow channel, solve the problem of processing dead corners, make the surface roughness of the flow channel uniform, and improve the quality of the valve body inner wall; on the other hand, it can quickly switch the processing flow channel without repeatedly adjusting the overall tooling, thus improving processing efficiency. This invention drives the used abrasive to flow back to the storage bin through a recycling pipe, forming a closed-loop abrasive circulation system. This not only reduces abrasive waste and lowers processing costs, but also ensures a continuous abrasive supply, preventing processing interruptions due to abrasive replenishment. Furthermore, the multi-outlet feeding design allows for easy switching of flow channels by simply loading and unloading the tooling plug and adjusting the tooling pressure plate, eliminating the need to load and unload the entire tooling, significantly saving loading and unloading time and further improving processing efficiency. In this invention, the bolted connection of the tooling plug, together with the elastic material of the sealing gasket and the tooling plug, effectively prevents abrasive leakage and ensures stable processing pressure within the flow channel. The precise connection between the tooling pressure plate and the shaft and gears ensures accurate positioning during pressure plate adjustment, avoiding processing deviations due to loose connections. Furthermore, the detachable or adjustable design of each component allows the tooling to adapt to 3D printed valve bodies of different sizes and structures, improving adaptability while reducing assembly and disassembly steps and lowering operational difficulty.

[0013] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the tooling of the present invention; Figure 2 This is a rear view of the tooling of the present invention; Figure 3 This is a schematic diagram showing the position of the tooling plug of the present invention; Figure 4 This is a schematic diagram of the tooling plug of the present invention; Figure 5 This is a schematic diagram showing the location of the tooling plug of the present invention; Figure 6 This is a schematic diagram of the tooling plug of the present invention; Figure 7 This is a cross-sectional view of the tooling pressure plate of the present invention.

[0015] In the diagram: 1. Storage bin; 2. Feed pipe; 3. Feed motor; 4. Base; 5. Tooling plug; 6. Valve body; 7. Abrasive recovery tank; 8. Gear motor; 9. Tooling pressure plate gear; 10. Tooling pressure plate bracket; 11. Tooling pressure plate shaft; 12. Recovery pipe; 13. Recovery motor; 14. Tooling plug; 15. Tooling pressure plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0017] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0018] Example 1 like Figure 1-7 As shown, this embodiment of the invention provides a multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body, including a base 4, a storage bin 1, a feed pipe 2, a feed motor 3, a tooling plug 5, a valve body 6, a tooling plug 14, a tooling pressure plate 15, a tooling pressure plate shaft 11, a tooling pressure plate gear 9, a gear motor 8, an abrasive recovery tank 7, a recovery pipe 12, and a recovery motor 13; The storage bin 1 is welded and fixed to the top left side of the base 4. The feed pipe 2 is made of stainless steel, with one end welded to the right side of the storage bin 1 and the other end having 3 outlets. The feeding motor 3 is a stepper motor, which is fixed to the outer left side wall of the storage bin 1 by bolts. The output end is connected to a spiral blade, which extends into the interior of the storage bin 1. The tool plug 5 is made of brass. One end is threaded to the outlet of the feed pipe 2, and the other end is fixed to the abrasive inlet on the left side of the valve body 6 by bolts. The outer periphery is covered with a nitrile rubber sealing gasket. The valve body 6 is a 3D printed aluminum alloy valve body, which is fixed by the vertical plate bolts on the base 4; The tooling plug 14 is made of rubber and seals the two non-machined flow channel outlets on the right side of the valve body 6. The tooling pressure plate 15 is made of hard alloy and is located in the cavity of the valve body 6. Its top is welded to the tooling pressure plate shaft 11. The top of the tooling pressure plate shaft 11 is connected to the tooling pressure plate gear 9 via a flat key. The gear motor 8 is a servo motor, which is fixed to the right side of the storage bin 1 by a bracket, and the output gear meshes with the tooling pressure plate gear 9. The abrasive recovery tank 7 is made of stainless steel, welded to the top of the base 4 and located below the valve body 6, with an inner wall inclined at an angle of 20°. The recycling pipe 12 is a PU pipe, and its two ends are respectively connected to the recycling tank and the storage bin 1 with clamps; The recovery motor 13 is a peristaltic pump, which is fixed in the middle of the recovery pipe 12.

[0019] In this embodiment, the multi-outlet feed pipe 2 of the tooling can simultaneously feed material to the three flow channels of the valve body 6. With the tooling plug 14 and tooling pressure plate 15, single flow channel processing can be achieved. The spiral blades of the feed motor 3 can stably push the abrasive, ensuring uniform abrasive pressure. The recycling system forms a closed loop, with a high abrasive recycling rate and reduced waste. The overall tooling can be loaded and unloaded by simply disassembling the tooling plug 14 and adjusting the tooling pressure plate 15, which saves loading and unloading time compared to traditional tooling and is suitable for small and medium batch 3D printing valve body processing.

[0020] Example 2 The difference between this embodiment and embodiment 1 is that the number of outlets of the feed pipe 2 is increased to 5, which is suitable for a 5-channel 3D printed valve body; The sealing gasket around the outer periphery of tool plug 5 has been replaced with fluororubber. A PLC controller (model S7-200) is added, and the feeding motor 3, gear motor 8, and recycling motor 13 are all electrically connected to the PLC controller; An agitation assembly (Agitator motor model YS7134, agitator shaft diameter of 20mm, and a three-bladed agitator) is added inside storage silo 1.

[0021] In this embodiment, the feed pipe 2 with 5 outlets can be adapted to a multi-channel valve body, expanding the application range of the tooling; the fluororubber sealing gasket is wear-resistant and aging-resistant, with a service life twice that of the nitrile rubber sealing gasket, and can still maintain good sealing performance in the temperature range of -20℃ to 200℃, making it suitable for processing in different temperature environments; The PLC controller can preset processing parameters, such as the feed motor speed of 500 r / min, the gear motor rotation angle of 30° / cycle, and the recovery motor speed of 300 r / min, to achieve automated processing and control the processing consistency error within ±0.05μm; The stirring component of storage bin 1 can prevent abrasive sedimentation and control the abrasive concentration deviation within ±2%, ensuring consistent processing effect in each flow channel. It is suitable for mass production and multi-specification 3D printing of valve bodies.

[0022] Example 3 The difference between this embodiment and embodiment 2 is that a stainless steel filter layer (0.1mm pore size) is added inside the abrasive recovery tank 7. The flow regulating valves at each outlet of feed pipe 2 are replaced with electromagnetic flow regulating valves and electrically connected to the PLC controller. The holes on the tooling plate 15 are replaced with replaceable sleeves (the sleeves are made of polytetrafluoroethylene, and the hole diameter can be replaced with 6mm, 8mm, or 10mm). The bottom of base 4 is equipped with shock-absorbing pads (made of rubber, 10mm thick).

[0023] In this embodiment, the filter layer of the abrasive recovery tank 7 can filter impurities in the abrasive (such as metal chips generated during valve body processing). The impurity filtration rate is high, which avoids impurities scratching the flow channel surface of subsequent processing and improves the processing quality. The electromagnetic flow regulating valve, in conjunction with the PLC controller, can precisely control the abrasive flow rate at each outlet (control accuracy ±1mL / min), adapting to the processing requirements of different flow channel sizes (e.g., 5mL / min for small flow channels and 15mL / min for large flow channels). The replaceable sleeve allows the tooling pressure plate 15 to be adapted to valve body cavity holes of different diameters without the need for complete replacement, reducing tooling costs. The shock-absorbing feet can reduce the transmission of vibration during motor operation, reducing the vibration amplitude of the base from 0.5mm to 0.1mm, avoiding tooling position displacement caused by vibration, and further improving machining accuracy. It is suitable for high-precision 3D printing of valve bodies (such as hydraulic valve bodies for aerospace).

[0024] Working principle and usage process of this invention: In the preliminary preparation stage, the 3D printed valve body 6 to be processed is fixed with the vertical plate bolts on the base 4 to ensure the stability of the valve body 6. According to the number of flow channels and the inlet position of the valve body 6, each outlet of the feed pipe 2 is connected to the abrasive inlet of the valve body 6 through the tooling plug 5. The fixing bolts of the tooling plug 5 are tightened to make the sealing gasket fit tightly against the end face of the valve body 6 to prevent abrasive leakage. Abrasive of a preset concentration is injected into the storage bin 1. According to the flow channel to be processed, the outlet of the non-processed flow channel is sealed with the tooling plug 14 to ensure a tight seal. During the tooling adjustment stage, the gear motor 8 is started, which drives the tooling pressure plate gear 9 to rotate. The tooling pressure plate gear 9 drives the tooling pressure plate shaft 11 and the tooling pressure plate 15 to rotate synchronously until the hole on the tooling pressure plate 15 is completely aligned with the cavity hole of the valve body 6 corresponding to the flow channel to be processed. If a PLC controller is provided, the rotation angle of the gear motor 8 can be preset by the controller to achieve automatic alignment. After alignment, the gear motor 8 is turned off. During the abrasive conveying and processing stage, the feeding motor 3 and the recovery motor 13 are started. The feeding motor 3 drives the spiral blades in the storage bin 1 to rotate, pushing the abrasive towards the feeding pipe 2. The abrasive enters the processing channel of the valve body 6 through the corresponding outlet of the feeding pipe 2 and the tooling plug 5. The abrasive flows in the channel at a preset pressure. Through the relative movement of the abrasive grains and the inner wall of the channel, micro-cutting and micro-plastic deformation are achieved, removing burrs and sharp angles from the surface of the channel and reducing surface roughness. During the processing, if a stirring assembly is provided, the stirring motor continuously drives the stirring blades to rotate to prevent the abrasive from settling in the storage bin 1. If an electromagnetic flow regulating valve is provided, the PLC controller adjusts the flow rate in real time to ensure a stable supply of abrasive. After the abrasive is used in the abrasive recycling stage, it flows out from the outlet of the processing channel of the valve body 6 and falls into the abrasive recycling tank 7 below. Guided by the inclined inner wall of the recycling tank, the abrasive flows towards the recycling pipe 12. If a filter layer is provided, the abrasive enters the recycling pipe 12 after the impurities are filtered by the filter layer. The recycling motor 13 drives the abrasive in the recycling pipe 12 to flow and transport the abrasive back to the storage bin 1, thus completing the abrasive cycle. During the flow channel switching stage, when a flow channel is completed, turn off the feed motor 3 and the recovery motor 13; remove the tooling plug 14 from the outlet of the flow channel and seal it to the outlet of the processed flow channel; restart the gear motor 8 and adjust the tooling pressure plate 15 to align with the next flow channel to be processed; repeat steps 3-4 until all flow channels of the valve body 6 are processed. After all flow channels are processed in the post-processing cleaning stage, turn off all motors, disassemble tool plug 5 and tool plug 14, and remove valve body 6 from base 4; clean the residual abrasive in the flow channel of valve body 6, and at the same time clean the filter layer (if any) of abrasive recovery tank 7 and recovery pipe 12 to ensure that there is no residual abrasive inside the tooling, in preparation for the next processing.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-outlet adjustable abrasive flow tooling for polishing the flow channels of 3D printed valve bodies, comprising a base (4), characterized in that: It also includes a storage bin (1) fixedly installed on the top of the base (4), a feed pipe (2) with one end connected to the storage bin (1) and the other end having multiple outlets, a feed motor (3) fixed on the outside of the storage bin (1) and whose output end is connected to the abrasive drive inside the storage bin (1), a tooling plug (5) installed one-to-one at each outlet of the feed pipe (2) and whose end away from the feed pipe (2) is detachably connected to the abrasive inlet of the valve body (6), a tooling plug (14) used to seal the non-processing flow channel outlet of the valve body (6), and a tooling pressure plate (15) located inside the cavity of the valve body (6). A tooling pressure plate shaft (11) fixedly connected to the tooling pressure plate (15) at one end; a tooling pressure plate gear (9) sleeved and fixed at the end of the tooling pressure plate shaft (11) away from the tooling pressure plate (15); a gear motor (8) meshing with the tooling pressure plate gear (9) and fixed to the side wall of the base (4) or the storage bin (1); an abrasive recovery tank (7) fixed to the top of the base (4) and located below the valve body (6); a recovery pipe (12) with one end connected to the bottom of the abrasive recovery tank (7); and a recovery motor (13) fixed on the recovery pipe (12) and driving the abrasive flow. The end of the recycling pipe (12) away from the abrasive recycling tank (7) is connected to the storage bin (1), and the tooling pressure plate (15) has holes that correspond one-to-one with the holes inside the cavity of the valve body (6).

2. The multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body according to claim 1, characterized in that: The tooling plug (5) is fitted with an elastic sealing gasket on its outer periphery. The tooling plug (5) is detachably connected to the abrasive inlet of the valve body (6) by bolts. The bolts pass through the tooling plug (5) and are threadedly engaged with the valve body (6).

3. The multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body according to claim 1, characterized in that: The tooling plug (14) is made of rubber. The end of the tooling plug (14) away from the valve body (6) is provided with an annular flange. The outer diameter of the annular flange is larger than the inner diameter of the flow channel outlet of the valve body (6).

4. The multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body according to claim 1, characterized in that: The diameter of the hole on the tooling plate (15) is the same as the diameter of the hole inside the cavity of the valve body (6), and the tooling plate (15) is made of hard alloy.

5. The multi-outlet adjustable abrasive flow tooling for polishing the flow channels of 3D printed valve bodies according to claim 1, characterized in that: The feed pipe (2) is equipped with multiple outlets with flow regulating valves. The flow regulating valves are integrally formed with the feed pipe (2), and the regulating rod of the flow regulating valves extends to the outside of the feed pipe (2).

6. The multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body according to claim 1, characterized in that: The inner wall of the abrasive recovery tank (7) is inclined, and the inclination direction is downward from the end away from the recovery pipe (12) to the end close to the recovery pipe (12), with an inclination angle of 15°-30°.

7. The multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body according to claim 1, characterized in that: It also includes a PLC controller. The feeding motor (3), gear motor (8), and recycling motor (13) are all electrically connected to the PLC controller, which is fixed on one side of the base (4).

8. The multi-outlet adjustable abrasive flow tooling for polishing the flow channel of a 3D printed valve body according to claim 1, characterized in that: The storage silo (1) is equipped with a stirring assembly, which includes a stirring shaft and stirring blades. One end of the stirring shaft is rotatably connected to the top of the storage silo (1) and the other end extends to the bottom of the storage silo (1). The stirring blades are fixed on the outer periphery of the stirring shaft. A stirring motor is also fixed on the top of the storage silo (1), and the output end of the stirring motor is fixedly connected to the stirring shaft.

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