Spiral feeding equipment for powder material supply

Abstract

The invention relates to the technical field of feeding equipment, and provides spiral feeding equipment for powder feeding, which comprises a bracket, a feeding frame is fixedly connected to the outer surface of the bracket, a conveying pipe is fixedly connected to the lower end of the feeding frame, a crushing structure is connected between the conveying pipe and the feeding frame, and a dustproof structure is connected to the outer surface of the feeding frame. A conveying shaft rod is rotationally connected into the conveying pipe. The crushing structure comprises a partition plate fixedly connected to the surface of the inner wall of the conveying pipe, a driving belt wheel is fixedly connected to the outer surface of the conveying shaft rod, a first shaft penetrates through the position, close to the lower end, of the surface of the feeding frame, an adjusting belt wheel is connected to one end of the first shaft, and a transmission belt is wound between the adjusting belt wheel and the driving belt wheel. One end of the first shaft is fixedly connected with a bevel gear, and the outer surface of the bevel gear is meshed with another set of bevel gears. By means of the technical scheme, the problem that due to the fact that existing feeding equipment is not provided with a crushing structure, feeding can be affected when caked powder with high humidity is conveyed is solved.

Description

Technical Field

[0001] The invention relates to the technical field of feeding equipment, and in particular to a screw feeding equipment for feeding powder materials. Background Art

[0002] The powder material spiral feeding equipment is a device that conveys powder material by spiral rotation. The powder material can be conveyed by setting the spiral blade structure, and the powder material can be conveyed from low to high by setting it obliquely. The feed in this application is mainly powder or granular raw materials; After searching, the authorization announcement number is CN110963318B, which is a screw feeder that can meet various usage requirements. With this solution, the user can freely adjust the inclination angle of the conveying pipe according to the height of the receiving device, so that the discharge port is just above the receiving device. In addition, the user can freely select a suitable discharge port for discharge according to the needs, so that the screw feeder has good applicability and meets the various usage requirements of customers. However, the above-mentioned existing feeding equipment does not have a crushing structure, which will affect the feeding when conveying agglomerated powder materials with high humidity. For this reason, we propose a spiral feeding equipment for feeding powder materials. Summary of the invention

[0003] The present invention provides a spiral feeding device for feeding powder materials, which solves the problem mentioned in the background technology that the existing feeding device has no broken structure and will affect the feeding when conveying agglomerated powder materials with high humidity.

[0004] The technical solution of the present invention is as follows: A spiral feeding device for feeding powder materials comprises a bracket, a feeding frame is fixedly connected to the outer surface of the bracket, a conveying pipe is fixedly connected to the lower end of the feeding frame, a crushing structure is connected between the conveying pipe and the feeding frame, a dustproof structure is connected to the outer surface of the feeding frame, and a conveying shaft is rotatably connected to the inside of the conveying pipe; The crushing structure includes a partition fixedly connected to the inner wall surface of the conveying pipe, the outer surface of the conveying shaft is fixedly connected to a driving pulley, the surface of the feed frame is connected with a No. 1 shaft near the lower end, one end of the No. 1 shaft is connected to an adjusting pulley, a transmission belt is wound around the adjusting pulley and the driving pulley, one end of the No. 1 shaft is fixedly connected to a bevel gear, the outer surface of the bevel gear is meshed with another group of bevel gears, the upper end of the other group of bevel gears is fixedly connected to a No. 2 shaft, the inner side of the feed frame is slidably connected to a feeding plate, the outer surface of the No. 2 shaft is fixedly connected to a cutting blade, and the outer surface of the feeding plate is provided with a feeding hole.

[0005] As a further technical solution of the present invention, a spiral blade is fixedly connected to the outer surface of the conveying shaft, a conveying motor is fixedly connected to one end of the conveying pipe, the conveying motor is used to drive the conveying shaft to rotate, a connecting pipe is fixedly connected to the outer surface of the conveying pipe, and a mixing kettle is detachably connected to the outlet end of the connecting pipe, and the mixing kettle is used to mix and process the raw materials to be conveyed.

[0006] As a further technical solution of the present invention, a vibration assembly is arranged between the feeding plate and the feeding frame, and the vibration assembly includes a fixed block fixedly connected to the inner wall surface of the feeding frame, a sliding column is fixedly connected to the lower end of the fixed block, a vibration spring is connected between the fixed block and the feeding plate, a limiting block is fixedly connected to the inner side of the feeding frame, the No. 2 shaft passes through the feeding plate, a fixed ball is fixedly connected to the outer surface of the feeding plate near the No. 2 shaft, and a movable ball is fixedly connected to the outer surface of the No. 2 shaft.

[0007] As a further technical solution of the present invention, the dust-proof structure includes a circulating air duct fixedly connected to the outer surface of the feed frame, the outer surface of the circulating air duct is fixedly connected to a circulating low-speed motor, the output end of the circulating low-speed motor is fixedly connected to an air duct shaft, the outer surface of the air duct shaft is fixedly connected to fan blades, and a guide plate is fixedly connected to the inner side of the feed frame near the upper end of the circulating air duct.

[0008] As a further technical solution of the present invention, the adjusting pulley includes a rotating kit fixedly connected to the surface of the No. 1 shaft, the outer surface of the rotating kit is connected to a small electric cylinder, the output end of the small electric cylinder is fixedly connected to a movable ring, the end of the small electric cylinder away from the output is fixedly connected to the rotating kit, the adjusting pulley is an elastic belt, and the diameter of the wheel body is formed by adjusting a plurality of adjusting pulleys by extending or contracting the small electric cylinder, the transmission belt is used to realize the rotation of the active pulley to drive the adjusting pulley to follow the rotation, the No. 1 shaft and the feed frame are rotatably connected through a bearing, the No. 2 shaft is perpendicular to the No. 1 shaft, and the No. 2 shaft is rotatably connected to the feed plate.

[0009] As a further technical solution of the present invention, the cutting blade is used to break up the agglomerated powder material, and a detachable shield is connected between the feed frame and the conveying pipe near the adjusting pulley, the No. 1 shaft and the transmission belt. The No. 1 shaft and the shield are rotatably connected. The shield is used to maintain the rotation stability of the No. 1 shaft and protect it, and a protective cover is sleeved on the interior of the feed frame corresponding to the two sets of bevel gears, the No. 2 shaft and the No. 1 shaft.

[0010] As a further technical solution of the present invention, the protective cover is used to maintain the rotation stability of the No. 1 shaft, the bevel gear and the No. 2 shaft. The protective cover is fixedly connected to the feed frame. There is a certain gap between the upper end of the protective cover and the lower end of the feed hole. The gap is used to provide space for the feed plate to slide downward. The lower end of the feed plate is fixedly connected with a heating plate for heating the raw materials.

[0011] As a further technical solution of the present invention, the sliding column passes through the fixed block, the sliding column and the fixed block are slidably connected, and the upper and lower elastic ends of the vibration spring are fixedly connected to the feed plate and the fixed block respectively.

[0012] As a further technical solution of the present invention, the diameter of the sliding column is smaller than the outer diameter of the vibration spring, the limit block is used to limit the maximum distance of the feed plate moving upward, and the number of the fixed blocks, sliding columns and vibration springs are all in several groups and distributed in an array.

[0013] As a further technical solution of the present invention, the circulating air duct is a U-shaped structure, the lower end of the guide plate is lower than the lowermost end of the inner opening of the circulating air duct, the circulating low-speed motor is used to drive the air duct shaft to rotate, and the number of the fan blades is several groups and distributed in a ring array.

[0014] The working principle and beneficial effects of the present invention are: Through the effect of the crushing structure in the present invention, during use, the material fed into the feed frame can be further crushed while the conveying shaft is rotating. In the case of local agglomeration of the raw materials, the raw materials can be effectively crushed, thereby making subsequent mixing applications more efficient. At the same time, a certain vibration can be generated to promote the entire feeding and conveying process, and the frequency of crushing and vibration can be adjusted as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the device of the present invention together with the mixing kettle; Figure 2 It is a schematic diagram of the partial structure of the disassembled crushing structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of a local structure cut away from another perspective; Figure 4 For the present invention Figure 3 Schematic diagram of the partial structure disassembled from another perspective; Figure 5 For the present invention Figure 4 Schematic diagram of the local structure from another perspective; Figure 6 For the present invention Figure 5 A schematic diagram of the local structure at the moving ball from another perspective; Figure 7 It is a schematic diagram of the local structure of the dustproof structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the partial structure of the dustproof structure.

[0017] In the figure: 1, bracket; 2, feed frame; 3, conveying pipe; 4, crushing structure; 41, partition; 42, driving pulley; 43, adjusting pulley; 431, rotating kit; 432, movable ring; 433, small electric cylinder; 44, driving belt; 45, No. 1 shaft; 46, No. 2 shaft; 47, bevel gear; 48, protective cover; 49, cutting blade; 410, feeding plate; 411, feeding hole; 412, protective cover; 4 0. Vibration assembly; 401. Fixed block; 402. Sliding column; 403. Vibration spring; 404. Limit block; 405. Fixed ball; 406. Movable ball; 5. Dust-proof structure; 51. Circulating air duct; 52. Circulating low-speed motor; 53. Air duct shaft; 54. Fan blade; 55. Guide plate; 6. Mixing kettle; 7. Connecting pipe; 8. Conveying motor; 9. Conveying shaft; 10. Spiral blade; 11. Heating plate. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0019] like Figure 1 to Figure 6 As shown, this embodiment proposes a spiral feeding device for feeding powder materials, including a bracket 1, a feeding frame 2 is fixedly connected to the outer surface of the bracket 1, a conveying pipe 3 is fixedly connected to the lower end of the feeding frame 2, a crushing structure 4 is connected between the conveying pipe 3 and the feeding frame 2, a dustproof structure 5 is connected to the outer surface of the feeding frame 2, and a conveying shaft 9 is rotatably connected to the inside of the conveying pipe 3; The crushing structure 4 includes a partition 41 fixedly connected to the inner wall surface of the conveying pipe 3, a driving pulley 42 is fixedly connected to the outer surface of the conveying shaft 9, a No. 1 shaft 45 is connected through the surface of the feed frame 2 near the lower end, one end of the No. 1 shaft 45 is connected to an adjusting pulley 43, a transmission belt 44 is wound around the adjusting pulley 43 and the driving pulley 42, one end of the No. 1 shaft 45 is fixedly connected to a bevel gear 47, the outer surface of the bevel gear 47 is meshed with another group of bevel gears 47, the upper end of the other group of bevel gears 47 is fixedly connected to a No. 2 shaft 46, the inner side of the feed frame 2 is slidably connected to a feeding plate 410, the outer surface of the No. 2 shaft 46 is fixedly connected to a cutting blade 49, and the outer surface of the feeding plate 410 is provided with a feeding hole 411.

[0020] The outer surface of the conveying shaft 9 is fixedly connected with a spiral blade 10, one end of the conveying pipe 3 is fixedly connected with a conveying motor 8, the conveying motor 8 is used to drive the conveying shaft 9 to rotate, the outer surface of the conveying pipe 3 is fixedly connected with a connecting pipe 7, the outlet end of the connecting pipe 7 is detachably connected with a mixing kettle 6, and the mixing kettle 6 is used to mix and process the raw materials to be conveyed.

[0021] A vibration assembly 40 is arranged between the feeding plate 410 and the feeding frame 2, and the vibration assembly 40 includes a fixed block 401 fixedly connected to the inner wall surface of the feeding frame 2, a sliding column 402 is fixedly connected to the lower end of the fixed block 401, a vibration spring 403 is connected between the fixed block 401 and the feeding plate 410, a limiting block 404 is fixedly connected to the inner side of the feeding frame 2, the second shaft 46 runs through the feeding plate 410, and a fixed ball 405 is fixedly connected to the outer surface of the feeding plate 410 near the second shaft 46, and a movable ball 406 is fixedly connected to the outer surface of the second shaft 46.

[0022] The adjusting pulley 43 includes a rotating kit 431 fixedly connected to the surface of the No. 1 shaft 45, the outer surface of the rotating kit 431 is connected to a small electric cylinder 433, the output end of the small electric cylinder 433 is fixedly connected to a movable ring 432, the end of the small electric cylinder 433 away from the output is fixedly connected to the rotating kit 431, the adjusting pulley 43 is an elastic belt, and the diameter of the wheel body formed by a plurality of adjusting pulleys 43 is adjusted by extending or contracting the small electric cylinder 433, the transmission belt 44 is used to realize the rotation of the active pulley 42 to drive the adjusting pulley 43 to follow the rotation, the No. 1 shaft 45 and the feed frame 2 are rotatably connected through bearings, the No. 2 shaft 46 is perpendicular to the No. 1 shaft 45, and the No. 2 shaft 46 and the feed plate 410 are rotatably connected.

[0023] The cutting blades 49 are used to break up the agglomerated powder materials. A detachable shield 412 is connected between the feed frame 2 and the conveying pipe 3 near the adjusting pulley 43, the No. 1 shaft 45 and the transmission belt 44. The No. 1 shaft 45 and the shield 412 are rotatably connected. The shield 412 is used to maintain the rotation stability of the No. 1 shaft 45 and protect it. The interior of the feed frame 2 corresponds to the two sets of bevel gears 47, the No. 2 shaft 46 and the No. 1 shaft 45, and a protective cover 48 is sleeved.

[0024] The protective cover 48 is used to maintain the rotation stability of the No. 1 shaft 45, the bevel gear 47 and the No. 2 shaft 46. The protective cover 48 is fixedly connected to the feed frame 2. There is a certain gap between the upper end of the protective cover 48 and the lower end of the feed hole 411. The gap is used to provide space for the feed plate 410 to slide downward. The lower end of the feed plate 410 is fixedly connected with a heating plate 11 for heating the raw materials.

[0025] The sliding column 402 penetrates the fixed block 401 , and the sliding column 402 and the fixed block 401 are slidably connected. The upper and lower elastic ends of the vibration spring 403 are fixedly connected to the feeding plate 410 and the fixed block 401 respectively.

[0026] The diameter of the sliding column 402 is smaller than the outer diameter of the vibration spring 403. The limit block 404 is used to limit the maximum distance that the feeding plate 410 moves upward. The number of the fixed blocks 401, the sliding column 402 and the vibration spring 403 are all in several groups and are distributed in an array.

[0027] In this embodiment, during use, the material fed into the feed frame 2 can be further broken up by rotating the conveying shaft 9. In the case of local agglomeration of the raw materials, the raw materials can be effectively broken up, thereby making subsequent mixing applications more efficient. At the same time, a certain vibration can be generated to promote the entire feeding and conveying process, and the frequency of crushing and vibration can be adjusted as needed. Example

[0028] like Figure 7~Figure 8 As shown, on the basis of Example 1, a dust-proof structure 5 is proposed, which includes a circulating air duct 51 fixedly connected to the outer surface of the feed frame 2, a circulating low-speed motor 52 is fixedly connected to the outer surface of the circulating air duct 51, an output end of the circulating low-speed motor 52 is fixedly connected to an air duct shaft 53, a fan blade 54 is fixedly connected to the outer surface of the air duct shaft 53, and a guide plate 55 is fixedly connected to the inner side of the feed frame 2 near the upper end of the circulating air duct 51.

[0029] The circulating air duct 51 is of a U-shaped structure, the lower end of the guide plate 55 is lower than the lowermost end of the inner opening of the circulating air duct 51, the circulating low-speed motor 52 is used to drive the air duct shaft 53 to rotate, and the number of fan blades 54 is several groups and distributed in a ring array.

[0030] In this embodiment, dust during powder material feeding can be effectively controlled, and dust leakage from the opening of the feed frame 2 to the outside can be greatly reduced. A circulating flow of air can be formed within the circulating air duct 51. At the same time, the guide plate 55 can prevent the material body from directly entering the circulation range inside the circulating air duct 51.

[0031] In summary, the use principle of the present invention is as follows: During use, the user can pour the material from the upper opening of the feed frame 2, and the conveying motor 8 drives the conveying shaft 9 to rotate, and the conveying shaft 9 rotates to drive the spiral blade 10 to rotate and convey the raw materials. The raw materials are conveyed from the conveying pipe 3 to the inside of the connecting pipe 7, and finally sent to the inside of the mixing kettle 6 through the connecting pipe 7 for mixing; During the above operation, the conveying shaft 9 rotates, which drives the driving pulley 42 to rotate. The driving pulley 42 drives the adjusting pulley 43 to rotate through the transmission belt 44. The adjusting pulley 43 drives the No. 1 shaft 45 to rotate. The No. 1 shaft 45 drives the bevel gear 47 to rotate. The bevel gear 47 drives another set of bevel gears 47 to rotate. The No. 2 shaft 46 is driven to rotate through another set of bevel gears 47. The No. 2 shaft 46 drives the cutting blade 49 to rotate. The cutting blade 49 beats the agglomerated powder or granular material, and the crushed raw materials flow into the bottom through the material passing hole 411 and fall into the interior of the conveying pipe 3. During the rotation of the second shaft 46, the rotation of the second shaft 46 will drive the movable ball 406 to rotate, and the movable ball 406 will hit the fixed ball 405, so that the fixed ball 405 and the feeding plate 410 move downward, and the vibration spring 403 will push the feeding plate 410 to move upward, and finally achieve the effect of periodic up and down vibration of the feeding plate 410, which can promote the raw materials to be discharged downward through the feeding hole 411, and at the same time, the heating plate 11 can emit heat to heat the raw materials to a certain extent, and the stability of the up and down movement of the feeding plate 410 can be maintained through the action between the sliding column 402 and the fixed block 401; In the process of crushing the agglomerated raw materials, the diameter of the wheel body formed by several groups of movable rings 432 can be adjusted by extending or contracting the small electric cylinder 433, so as to freely adjust the rotation speed of the No. 1 shaft 45 and achieve a better crushing effect. At the same time, the frequency of vibration can be adjusted to achieve better crushing and feeding effects.

[0032] During the above-mentioned use, the circulating low-speed motor 52 can be used to drive the air duct shaft 53 to rotate, and the air duct shaft 53 can be used to drive the fan blades 54 to rotate at a low speed, so as to slowly blow the airflow within the range of the circulating air duct 51, thereby forming a circulation, and the fine raw materials scattered on the inner side of the feed frame 2 will gather and flow, forming a dust control effect. At the same time, the guide plate 55 can prevent the raw materials from falling directly from entering the interior of the circulating air duct 51, so as to achieve a better dust control effect.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw feeding device for feeding powder material, comprising a bracket (1), characterized in that: The outer surface of the support (1) is fixedly connected to a feed frame (2), the lower end of the feed frame (2) is fixedly connected to a conveying pipe (3), a crushing structure (4) is connected between the conveying pipe (3) and the feed frame (2), the outer surface of the feed frame (2) is connected to a dustproof structure (5), and the interior of the conveying pipe (3) is rotatably connected to a conveying shaft (9); The crushing structure (4) comprises a partition (41) fixedly connected to the inner wall surface of the conveying pipe (3); the outer surface of the conveying shaft (9) is fixedly connected to a driving pulley (42); a first shaft (45) is connected through the surface of the feed frame (2) near the lower end; one end of the first shaft (45) is connected to an adjusting pulley (43); a transmission belt (44) is wound between the adjusting pulley (43) and the driving pulley (42); one end of the first shaft (45) is fixedly connected to a bevel gear (47); the outer surface of the bevel gear (47) is meshingly connected to another group of bevel gears (47); the upper end of the other group of bevel gears (47) is fixedly connected to a second shaft (46); a feeding plate (410) is slidably connected to the inner side of the feed frame (2); a cutting blade (49) is fixedly connected to the outer surface of the second shaft (46); and a feeding hole (411) is provided on the outer surface of the feeding plate (410).

2. The screw feeding device for powder material feeding according to claim 1, characterized in that: The outer surface of the conveying shaft (9) is fixedly connected to a spiral blade (10); one end of the conveying pipe (3) is fixedly connected to a conveying motor (8), the conveying motor (8) is used to drive the conveying shaft (9) to rotate; the outer surface of the conveying pipe (3) is fixedly connected to a connecting pipe (7), the outlet end of the connecting pipe (7) is detachably connected to a mixing kettle (6), and the mixing kettle (6) is used to mix and process the conveyed raw materials.

3. The screw feeding device for powder material feeding according to any one of claims 1 or 2, characterized in that: A vibration assembly (40) is arranged between the feed plate (410) and the feed frame (2), and the vibration assembly (40) comprises a fixed block (401) fixedly connected to the inner wall surface of the feed frame (2), a sliding column (402) is fixedly connected to the lower end of the fixed block (401), a vibration spring (403) is connected between the fixed block (401) and the feed plate (410), a limit block (404) is fixedly connected to the inner side of the feed frame (2), the second shaft (46) passes through the feed plate (410), a fixed ball (405) is fixedly connected to the outer surface of the feed plate (410) near the second shaft (46), and a movable ball (406) is fixedly connected to the outer surface of the second shaft (46).

4. The screw feeding device for powder material feeding according to claim 1, characterized in that: The dustproof structure (5) comprises a circulating air duct (51) fixedly connected to the outer surface of the feed frame (2); a circulating low-speed motor (52) is fixedly connected to the outer surface of the circulating air duct (51); an output end of the circulating low-speed motor (52) is fixedly connected to an air duct shaft rod (53); a fan blade (54) is fixedly connected to the outer surface of the air duct shaft rod (53); and a guide plate (55) is fixedly connected to the inner side of the feed frame (2) near the upper end of the circulating air duct (51).

5. The screw feeding device for powder material feeding according to claim 1, characterized in that: The adjusting pulley (43) comprises a rotating set (431) fixedly connected to the surface of the first shaft (45); the outer surface of the rotating set (431) is connected to a small electric cylinder (433); the output end of the small electric cylinder (433) is fixedly connected to a movable ring (432); the end of the small electric cylinder (433) away from the output is fixedly connected to the rotating set (431); the adjusting pulley (43) is an elastic belt; the diameter of a wheel body formed by a plurality of adjusting pulleys (43) is adjusted by extending or contracting the small electric cylinder (433); the transmission belt (44) is used to realize the rotation of the driving pulley (42) to drive the adjusting pulley (43) to follow the rotation; the first shaft (45) and the feeding frame (2) are rotationally connected via a bearing; the second shaft (46) is perpendicular to the first shaft (45); and the second shaft (46) and the feeding plate (410) are rotationally connected.

6. The screw feeding device for powder material feeding according to claim 5, characterized in that: The cutting blade (49) is used to break up the agglomerated powder material. A detachable shield (412) is connected between the feed frame (2) and the conveying pipe (3) near the adjusting pulley (43), the No. 1 shaft (45) and the transmission belt (44). The No. 1 shaft (45) and the shield (412) are rotatably connected. The shield (412) is used to maintain the rotation stability of the No. 1 shaft (45) and protect it. The inside of the feed frame (2) is sleeved with a shield (48) corresponding to the two sets of bevel gears (47), the No. 2 shaft (46) and the No. 1 shaft (45).

7. The screw feeding device for powder material feeding according to claim 6, characterized in that: The protective cover (48) is used to maintain the rotation stability of the first shaft (45), the bevel gear (47) and the second shaft (46); the protective cover (48) is fixedly connected to the feed frame (2); there is a certain gap between the upper end of the protective cover (48) and the lower end of the feed hole (411); the gap is used to provide space for the feed plate (410) to slide downward; the lower end of the feed plate (410) is fixedly connected to a heating plate (11) for heating the raw materials.

8. The screw feeding device for powder material feeding according to claim 3, characterized in that: The sliding column (402) passes through the fixed block (401), and the sliding column (402) and the fixed block (401) are slidably connected. The upper and lower elastic ends of the vibration spring (403) are fixedly connected to the feed plate (410) and the fixed block (401) respectively.

9. The screw feeding device for powder material feeding according to claim 8, characterized in that: The diameter of the sliding column (402) is smaller than the outer diameter of the vibration spring (403); the limit block (404) is used to limit the maximum distance that the feeding plate (410) moves upward; and the fixed blocks (401), the sliding columns (402) and the vibration springs (403) are provided in groups and are arranged in an array.

10. The screw feeding device for powder material feeding according to claim 4, characterized in that: The circulating air duct (51) is of a U-shaped structure, the lower end of the guide plate (55) is lower than the lowermost end of the inner opening of the circulating air duct (51), the circulating low-speed motor (52) is used to drive the air duct shaft (53) to rotate, and the fan blades (54) are in a plurality of groups and are distributed in a ring array.

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