Material collecting mechanism for jet mill equipment

Abstract

The utility model relates to the technical field of material collection, in particular to a material collection mechanism for jet mill equipment, which comprises a collection barrel, a turntable, a second rotating shaft, a transmission module, a central shaft, an air guide component and an intermittent discharge component, and an exhaust pipe is arranged on the collection barrel; the turntable is rotationally arranged in the collecting barrel and is provided with a plurality of dust collecting bags; the hollow shaft is rotationally arranged on the rotating disc, and one end, provided with the air spraying pipe, of the hollow shaft is inserted into the dust collection cloth bag; the second rotating shaft is rotationally connected with the exhaust pipe and is provided with an impeller; the transmission module is in transmission connection with the hollow shafts and the second rotating shaft; the central shaft is connected with the collecting barrel and is provided with an air inlet pipe; the central shaft and the hollow shafts are intermittently conducted by the air guide assembly; the input end of the intermittent discharging assembly communicates with the collecting barrel. The dust collecting bags are driven to rotate by high-speed flowing airflow, so that the service life of the dust collecting bags is prolonged, the dust collecting bags are automatically backwashed and cleaned one by one, and meanwhile, materials and air are automatically separated and discharged.

Description

Technical Field

[0001] This utility model relates to the field of material collection technology, specifically to a material collection mechanism for an air jet mill. Background Technology

[0002] An air jet mill is an industrial device that uses the energy of a high-speed airflow (such as compressed air or superheated steam) to achieve ultrafine grinding of materials. It is mainly used in fields with special requirements for particle size purity, heat sensitivity, or hardness. Existing air jet mill equipment often uses bag filters (bag dust collectors) for material collection.

[0003] However, in order to prevent the filter bags from becoming clogged and reducing filtration efficiency, existing bag collection mechanisms require multiple sets of pulse dust collectors inside the collection equipment to backwash and clean the bags from the inside out. This requires a large number of pulse valves, which need to be individually controlled, resulting in high costs. In addition, in the existing structure, the position of the bags is fixed, which means that after long-term use, one side of the bag will be damaged while the other side remains intact, thus shortening the service life of the bags. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a material collection mechanism for an air jet mill.

[0005] The technical solution of this utility model is: a material collection mechanism for an air jet mill, including a collection bucket, a feed hole on the collection bucket, and an exhaust pipe on the top cover of the collection bucket;

[0006] A turntable is set inside the collection bin and rotates coaxially with it. Several dust collection bags are arranged in a circular array on the turntable.

[0007] Hollow shafts are arranged in a circular array around the axis of the turntable. The lower ends of the hollow shafts are inserted into the dust collector bags on the corresponding sides, and several air jet pipes are provided at the ends of the hollow shafts that are inserted into the dust collector bags.

[0008] The second rotating shaft is rotatably connected to the exhaust pipe on the same axis, and an impeller is coaxially mounted on one end of the second rotating shaft that is inserted into the exhaust pipe.

[0009] The transmission module is a transmission connection between each hollow shaft and the second rotating shaft, so as to drive each hollow shaft to rotate when the impeller rotates, and at the same time drive the turntable to rotate.

[0010] A central shaft, which rotates coaxially with the turntable and is connected to the collection bucket, has an air inlet pipe that communicates with its inner cavity on the central shaft;

[0011] The air guiding assembly intermittently connects the central shaft to each hollow shaft to inject high-pressure air into each hollow shaft one by one;

[0012] And the intermittent discharge component, in the intermittent discharge state, the air in the collection tank can only be discharged along the exhaust pipe.

[0013] Preferably, a number of through holes are arranged in a ring array around the axis of the turntable, and a support cylinder with air holes is coaxially arranged on the inner wall of the through holes, with the dust collector bag sleeved on the outside of the support cylinder.

[0014] Preferably, the transmission module includes a first gear, a gear ring, a first rotating shaft, and a transmission assembly. The transmission assembly includes a first pulley, a second pulley, and a toothed belt. There are multiple first gears, and an annular groove is provided at the bottom of the top cover of the collection bucket. Each first gear is located in the annular groove, and the gear ring is located in the annular groove and coaxially connected to it. Each first gear meshes with the gear ring. Each first gear is coaxially connected to a hollow shaft on the corresponding side. The first rotating shaft is rotatably connected to the top cover of the collection bucket. A second gear is coaxially arranged on the first rotating shaft. The second gear is located in the annular groove and meshes with the gear ring. The second gear and the first gear do not interfere with each other. The first pulley is coaxially connected to the first rotating shaft, and the second pulley is coaxially connected to the second rotating shaft. The first pulley and the second pulley are connected by a synchronous belt drive.

[0015] Preferably, the air guiding assembly includes a ring, air guiding pipes, and annular covers. An air outlet is provided on the arc surface of the central shaft, communicating with its interior. The ring is sleeved on the central shaft and rotatably connected to it. The central shaft is located inside the ring. Several first air guiding holes are arranged in a ring array around the ring's axis. Each first air guiding hole alternately communicates with the air outlet while the ring is rotating. Each air guiding pipe is arranged in a ring array on the outer arc surface of the ring and communicates with the first air guiding holes on the corresponding side. Each annular cover is connected to the end of the corresponding side air guiding pipe away from the ring and communicates internally. Each annular cover is sleeved on the hollow shaft on the corresponding side and rotates coaxially with it. A second air guiding hole is provided on the hollow shaft, which is always communicating with the annular cover on the corresponding side.

[0016] Preferably, the intermittent discharge assembly includes a discharge conduit, a cylinder, and a motor. The discharge conduit is located at the bottom of the collection bucket and communicates with its interior. A discharge channel is provided inside the discharge conduit, and a cylindrical cavity communicating with the cylindrical channel is provided inside the discharge conduit. The cylinder is coaxially rotatably disposed in the cylindrical cavity. A receiving groove that fits the discharge channel is symmetrically arranged about its axis on the arc surface of the cylinder. A sealing cover is slidably disposed along its axial direction in the receiving groove. The outer end face of the sealing cover has the same curvature as the outer arc surface of the cylinder. The motor body is connected to the outer wall of the discharge conduit, and the output end of the motor is connected to the mounting shaft of the cylinder.

[0017] Preferably, there are two receiving grooves, and the two receiving grooves are symmetrical about the axis of the cylinder.

[0018] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0019] By installing an impeller inside the exhaust pipe of this device, high-speed airflow from the air mill is introduced into the device. The air then exits through the exhaust pipe, automatically driving the impeller to rotate. This eliminates the need for an external fan, as the impeller's rotation drives the dust collector bags and the central shaft to rotate. This allows the central shaft to connect with each hollow shaft, enabling direct backflushing cleaning of each dust collector bag. Furthermore, this structure keeps the dust collector bags in a continuous rotating state, ensuring uniform filtration on all surfaces and extending their service life. In this invention, the dust collector bags rotate slowly while the central shaft rotates quickly, improving the backflushing cleaning efficiency of each bag and preventing excessive mechanical friction between dust particles and filter bag fibers. Attached Figure Description

[0020] Figure 1 This is a perspective view of one embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the connection structure of the various components on the collection bucket in this utility model;

[0022] Figure 3 A schematic diagram of the connection structure of the various components on turntable 6;

[0023] Figure 4 This is a schematic diagram of the connection structure between the hollow shaft and the transmission module.

[0024] Figure 5 A schematic diagram of the structure with the central axis;

[0025] Figure 6 This is a schematic diagram of the intermittent discharge assembly.

[0026] Figure 7 This is a schematic diagram of the connection structure between the cylinder and the closed cover.

[0027] Reference numerals: 1. Air jet mill; 2. Discharge pipe; 3. Collection bucket; 301. Feed hole; 302. Support frame; 4. Exhaust pipe; 41. Exhaust port; 5. Support ring; 6. Turntable; 61. Through hole; 7. Support cylinder; 8. Dust collector bag; 9. Hollow shaft; 91. Jet pipe; 10. First gear; 11. Gear ring; 12. First rotating shaft; 13. Second gear; 14. Second rotating shaft; 15. Impeller; 16. Transmission assembly; 17. Central shaft; 171. Air outlet; 18. Ring; 19. Air guide pipe; 20. Annular cover; 21. Air inlet pipe; 211. Solenoid valve; 22. Discharge guide pipe; 23. Cylinder; 231. Receiving groove; 24. Sealing cover; 241. Connecting rod; 25. Motor. Detailed Implementation

[0028] Example 1

[0029] like Figures 1-7As shown, this utility model proposes a material collection mechanism for an air jet mill, comprising a collection tank 3, a turntable 6, a hollow shaft 9, a second rotating shaft 14, a transmission module, a central shaft 17, an air guiding assembly, and an intermittent discharge assembly. The collection tank 3 has a feed hole 301 and an exhaust pipe 4 on its top cover, with an exhaust port 41 communicating with the outside. The turntable 6 is located inside the collection tank 3 and rotates coaxially with it. Several dust collector bags 8 are arranged in a circular array on the turntable 6. Several through holes 61 are arranged in a circular array around the turntable 6's axis. A support cylinder 7 with air holes is coaxially mounted on the inner wall of each through hole 61, and the dust collector bags 8 are fitted onto the outside of the support cylinder 7. Several hollow shafts 9 are arranged in a circular array around the axis of the turntable 6. The lower ends of the hollow shafts 9 are inserted into the dust collector bags 8 on the corresponding sides and connected to the support cylinder 7. Several air jet pipes 91 are provided at the ends of the hollow shafts 9 inserted into the dust collector bags 8. The second rotating shaft 14 is rotatably connected to the exhaust pipe 4 on the same axis. An impeller 15 is coaxially provided at the end of the second rotating shaft 14 inserted into the exhaust pipe 4. The transmission module includes a first gear 10, a gear ring 11, a first rotating shaft 12, and a transmission assembly 16. The transmission assembly 16 includes a first pulley, a second pulley, and a toothed belt. There are multiple first gears 10, and an annular groove is provided at the bottom of the top cover of the collection bucket 3. Each first gear 10 is located in the annular groove, and the gear ring 11 is located in the annular groove and coaxially connected to it. Each first gear 10 meshes with the gear ring 11. Each first gear 10 is coaxially connected to the hollow shaft 9 on the corresponding side. The first rotating shaft 12 is rotatably connected to the top cover of the collection bucket 3. A second gear 13 is coaxially arranged on the first rotating shaft 12. The second gear 13 is located in the annular groove and meshes with the gear ring 11. The second gear 13 and the first gear 10 do not interfere with each other. The first pulley is coaxially connected to the first rotating shaft 12, and the second pulley is coaxially connected to the second rotating shaft 14. The first pulley and the second pulley are connected by a synchronous belt drive, and the outer diameter of the first pulley is much larger than the outer diameter of the second pulley. The transmission module is connected to each hollow shaft 9 and the second rotating shaft 14 to drive each hollow shaft 9 to rotate when the impeller 15 rotates, and at the same time drive the dust collector bag 8 to rotate. The central shaft 17 rotates coaxially with the turntable 6 and is coaxially connected to the lower end of the second rotating shaft 14. An air inlet pipe 21 communicating with its inner cavity is rotatably installed on the central shaft 17, and a solenoid valve 211 is installed on the air inlet pipe 21 to control the opening and closing of its interior.The air guiding assembly includes a ring 18, air guiding pipes 19, and annular covers 20. An air outlet 171 communicating with the interior is provided on the arc surface of the central shaft 17. The ring 18 is sleeved on the central shaft 17 and rotatably connected to it. The central shaft 17 is located inside the ring 18. Several first air guiding holes are arranged in a ring array around the axis of the ring 18. Each first air guiding hole alternately communicates with the air outlet 171 when the ring 18 is rotating. Each air guiding pipe 19 is arranged in a ring array on the outer arc surface of the ring 18 and communicates with the first air guiding hole on the corresponding side. Each annular cover 20 is connected to the end of the corresponding side air guiding pipe 19 away from the ring 18 and communicates internally. Each annular cover 20 is sleeved on the hollow shaft 9 on the corresponding side and rotates coaxially with it. A second air guiding hole is provided on the hollow shaft 9 that is always communicating with the annular cover 20 on the corresponding side. The air guiding assembly intermittently connects the central shaft 17 to each hollow shaft 9 to inject high-pressure air into each hollow shaft 9 sequentially. The intermittent discharge assembly includes a discharge conduit 22, a cylinder 23, and a motor 25. The discharge conduit 22 is located at the bottom of the collection tank 3 and communicates with its interior. A discharge channel is provided inside the discharge conduit 22, and a cylindrical cavity communicating with the cylindrical channel is provided inside the discharge conduit 22. The cylinder 23 is coaxially rotatably disposed in the cylindrical cavity. A receiving groove 231 that fits the discharge channel is symmetrically arranged about its axis on the arc surface of the cylinder 23. A sealing cover 24 is slidably disposed along its axial direction inside the receiving groove 231. The outer end face of the sealing cover 24 is consistent with the curvature of the outer arc surface of the cylinder 23. The body of the motor 25 is connected to the outer wall of the discharge conduit 22, and the output end of the motor 25 is connected to the mounting shaft of the cylinder 23. In the intermittent discharge state, the air in the collection tank 3 can only be discharged along the exhaust pipe 4.

[0030] It should be noted that the discharge pipe 2 of the air jet mill 1 is connected to the feed hole 301, the motor 25 is a servo motor, the input end of the air inlet pipe 21 is connected to the external air tank, and the external air tank is connected to the air compressor.

[0031] In this invention, when the air jet mill 1 is in operation, standard material and high-speed airflow enter the collection bucket 3 from the discharge pipe 2. Dust and particulate matter in the airflow come into contact with the outer wall of the dust collector bag 8. Air passes through the filter holes of the dust collector bag 8 and enters the dust collector bag 8, then rises. Subsequently, the air drives the impeller 15 to rotate and is discharged along the exhaust pipe 4. The rotating impeller 15 drives the central shaft 17 to rotate, so that the air outlet 171 is connected to each hollow shaft 9 one by one. On this basis, the air inlet pipe 21 circulates through the air outlet 171, the ring 18, the air guide pipe 19, and the annular cover 20 to... High-pressure air is injected into each hollow shaft 9. The high-pressure air is discharged through the jet pipe 91 and backwashes the dust collector bags 8, restoring the filter pores of the bags to be permeable. The impeller 15 rotates, driving the first shaft 12 to rotate via a synchronous belt. The first shaft 12 rotates, driving the second gear 13 to rotate, which in turn drives the gear ring 11 to rotate. The gear ring 11 rotates, driving each first gear 10 and the hollow shaft 9 to rotate synchronously and slowly, thereby driving each dust collector bag 8 to rotate slowly. This keeps the dust collector bags 8 in a dynamic state, preventing severe blockage of the filter pores on one side and extending their service life. Powder and granular materials sink into the receiving trough 231 below. The motor 25 drives the cylinder 23 to rotate, causing the raw materials in the receiving trough 231 to discharge downwards. At this time, the sealing cover 24 automatically slides down and closes the opening, preventing outside air and dust from being brought into the collection bucket 3.

[0032] Example 2

[0033] like Figure 7 As shown, the material collection mechanism for an airflow mill proposed in this utility model has two receiving grooves 231 compared to Embodiment 1. The two receiving grooves 231 are symmetrical about the axis of the cylinder 23. A connecting rod 241 is slidably arranged on the cylinder 23, and the two ends of the connecting rod 241 are respectively connected to the corresponding side of the sealing cover 24.

[0034] In an optional embodiment, the two receiving grooves 231 can improve the output efficiency of materials, and the lower sealing cover 24 can slide down rapidly under the downward pressure of the upper sealing cover 24, thereby accelerating the discharge of materials.

[0035] Example 3

[0036] like Figure 2 and Figure 3 The material collection mechanism for an airflow mill proposed in this utility model, compared with Embodiment 1 or Embodiment 2, has a support ring 5 coaxially arranged on the inner wall of the collection bucket 3, a turntable 6 rotatably connected to the support ring 5 coaxially, and a support frame 302 arranged on the inner wall of the collection bucket 3, with the lower end of the central shaft 17 connected to the support frame 302.

[0037] In this embodiment, the support ring 5, together with the support frame 302, provides auxiliary support for the turntable 6, thereby improving the stability of the turntable.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A material collection mechanism for an air classifier mill, characterized in that, include A collection bucket (3) is provided with a feed hole (301) and an exhaust pipe (4) is provided on the top cover of the collection bucket (3). Turntable (6) is set inside the collection bucket (3) and rotates coaxially with it. Several dust collection bags (8) are arranged in a circular array on the turntable (6). Hollow shafts (9) are arranged in a circular array around the axis of the turntable (6). The lower ends of the hollow shafts (9) are inserted into the dust collection bags (8) on the corresponding sides. Several air jet pipes (91) are provided at the end of the hollow shafts (9) inserted into the dust collection bags (8). The second rotating shaft (14) is coaxially rotatably connected to the exhaust pipe (4), and an impeller (15) is coaxially installed at one end of the second rotating shaft (14) inserted into the exhaust pipe (4); The transmission module is connected to each hollow shaft (9) and the second rotating shaft (14) so ​​as to drive each hollow shaft (9) to rotate when the impeller (15) rotates, and at the same time drive the dust collector bag (8) to rotate. A central shaft (17) is coaxially rotated with the turntable (6) and coaxially connected to the lower end of the second rotating shaft (14). An air intake pipe (21) communicating with its inner cavity is rotatably installed on the central shaft (17). The air guiding assembly intermittently connects the central shaft (17) with each hollow shaft (9) to inject high-pressure air into each hollow shaft (9) one by one; And the intermittent discharge component, in the intermittent discharge state, the air in the collection bucket (3) can only be discharged along the exhaust pipe (4).

2. The material collection mechanism for an air classifier mill according to claim 1, characterized in that, Several through holes (61) are arranged in a ring array around the axis of the turntable (6). A support cylinder (7) with air holes is coaxially arranged on the inner wall of the through holes (61). A hollow shaft (9) is connected to the support cylinder (7). A dust collector bag (8) is sleeved on the outside of the support cylinder (7).

3. The material collection mechanism for an air classifier mill according to claim 1, characterized in that, The transmission module includes a first gear (10), a gear ring (11), a first rotating shaft (12), and a transmission assembly (16). The transmission assembly (16) includes a first pulley, a second pulley, and a toothed belt. There are multiple first gears (10), and an annular groove is provided at the bottom of the top cover of the collection bucket (3). Each first gear (10) is located in the annular groove, and the gear ring (11) is located in the annular groove and coaxially connected to it. Each first gear (10) meshes with the gear ring (11). Each first gear (10) is divided into... The first rotating shaft (12) is rotatably connected to the top cover of the collection bucket (3). The second gear (13) is coaxially mounted on the first rotating shaft (12). The second gear (13) is located in the annular groove and meshes with the gear ring (11). The second gear (13) and the first gear (10) do not interfere with each other. The first pulley is coaxially connected to the first rotating shaft (12). The second pulley is coaxially connected to the second rotating shaft (14). The first pulley and the second pulley are connected by synchronous belt drive.

4. The material collection mechanism for an air classifier mill according to claim 1, characterized in that, The air guiding assembly includes a circular ring (18), an air guiding pipe (19), and an annular cover (20). An air outlet (171) communicating with the interior of the central shaft (17) is provided on the arc surface of the central shaft (17). The circular ring (18) is sleeved on the central shaft (17) and rotatably connected to it. The central shaft (17) is located inside the circular ring (18). Several first air guiding holes are arranged in a circular array around the axis of the circular ring (18). Each first air guiding hole alternately vents air as the circular ring (18) rotates. The holes (171) are connected, and each air guide tube (19) is arranged in a ring array on the outer arc surface of the ring (18) and connected to the first air guide hole on the corresponding side. Each ring cover (20) is connected to the end of the corresponding side air guide tube (19) away from the ring (18) and is internally connected. Each ring cover (20) is sleeved on the hollow shaft (9) on the corresponding side and rotates coaxially with it. The hollow shaft (9) is provided with a second air guide hole that is always connected to the ring cover (20) on the corresponding side.

5. The material collection mechanism for an air classifier mill according to claim 1, characterized in that, The intermittent discharge assembly includes a discharge conduit (22), a cylinder (23), and a motor (25). The discharge conduit (22) is located at the bottom of the collection bucket (3) and communicates with its interior. A discharge channel is provided inside the discharge conduit (22). A cylindrical cavity communicating with the cylindrical channel is provided inside the discharge conduit (22). The cylinder (23) is coaxially rotatably located inside the cylindrical cavity. A receiving groove (231) that fits the discharge channel is symmetrically arranged about its axis on the arc surface of the cylinder (23). A sealing cover (24) is slidably arranged along its axial direction inside the receiving groove (231). The outer end face of the sealing cover (24) is consistent with the curvature of the outer arc surface of the cylinder (23). The body of the motor (25) is connected to the outer wall of the discharge conduit (22). The output end of the motor (25) is connected to the mounting shaft of the cylinder (23).

6. The material collection mechanism for an air classifier mill according to claim 5, characterized in that, There are two receiving grooves (231), and the two receiving grooves (231) are symmetrical about the axis of the cylinder (23).

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