Mechanical and airflow composite crushing device

Abstract

The invention relates to the technical field of crushing devices, and particularly discloses a mechanical and airflow composite crushing device which comprises a crushing device, a discharging device arranged at a discharging opening of the crushing device, a grinding chamber arranged below the crushing device, a feeding device used for connecting the discharging device with the grinding chamber, and a screen pipe arranged at the upper end in the grinding chamber. The negative pressure device is connected with one end, arranged outside the grinding chamber, of the screen pipe; first screen holes are formed in the part, arranged in the grinding chamber, of the screen pipe; the feeding device comprises a material guiding pipe connected with the discharging device, a horizontally-arranged air guiding pipe, an aerostatic press connected with the air guiding pipe and a plurality of material blowing pipes arranged on the side edge of the air guiding pipe. The material guide pipe is communicated with the side wall of one end of the air guide pipe close to the aerostatic press; the ends, away from the air guide pipe, of the multiple blowing pipes are all arranged in the grinding chamber. The mechanical and airflow composite crushing device disclosed by the invention can efficiently crush materials into fine powder.

Description

Technical Field

[0001] The present invention relates to the technical field of pulverizing devices, and in particular to a mechanical and airflow composite pulverizing device. Background Art

[0002] Powder materials are widely used in many fields such as chemical industry, medicine, food, metallurgy, such as pharmaceutical preparations, pigments, catalysts, food additives, cosmetics, coatings, etc. In these applications, the particle size, particle morphology and distribution of the powder have an important impact on the quality, performance and production process of the final product. In particular, the demand for ultrafine powders (particle size less than 10μm) is growing, which requires the pulverization technology to continuously improve the pulverization efficiency and fineness to meet more sophisticated processing requirements.

[0003] At present, the main method for preparing powders is mechanical crushing, that is, repeatedly crushing and grinding the material through a grinding or crushing device to crush the material into the required particle size. For ultrafine powders, it usually takes a long time of repeated processing, which is not only very energy-consuming, but also has a long processing time and low processing efficiency. Therefore, a more efficient and low-energy crushing device can be designed. Summary of the invention

[0004] The object of the present invention is to provide a mechanical and airflow composite pulverizing device, which can efficiently pulverize materials into fine powder.

[0005] The present invention is achieved through the following technical scheme: the mechanical and airflow composite pulverizing device of the present invention comprises a crushing device, a discharge device arranged at the discharge port of the crushing device, a grinding chamber arranged below the crushing device, a feeding device for connecting the discharge device and the grinding chamber, a screen pipe arranged at the upper end of the grinding chamber, and a negative pressure device connected to one end of the screen pipe arranged outside the grinding chamber; the part of the screen pipe arranged in the grinding chamber is provided with a first sieve hole; the feeding device comprises a material guide pipe connected to the discharge device, a horizontally arranged air guide pipe, an air compressor connected to the air guide pipe, and a plurality of blowing pipes arranged on the side of the air guide pipe; the material guide pipe is connected to the side wall of one end of the air guide pipe close to the air compressor; the ends of the plurality of blowing pipes away from the air guide pipe are all arranged inside the grinding chamber.

[0006] Furthermore, the extended lines of the axes of the parts of the plurality of blowing pipes disposed in the grinding chamber intersect at one point.

[0007] Furthermore, a hollow guide plate is provided on the upper side of the interior of the grinding chamber, a first strip-shaped through hole is opened in the middle of the upper side of the guide plate, and a second strip-shaped through hole is opened in the middle of the lower side of the guide plate; the projection of the guide plate on the plane perpendicular to the length direction of the air guide pipe is V-shaped; the second through hole is arranged directly above the blowing pipe.

[0008] Furthermore, the projection of the grinding chamber on a plane perpendicular to the length direction of the air duct is an inverted triangle structure.

[0009] Furthermore, a pair of the sieve tubes are provided, and the pair of the sieve tubes are respectively arranged on both sides of the upper end of the grinding chamber, and the length direction of the sieve tubes is parallel to the length direction of the air guide pipe; the two sides of the upper end of the guide plate are respectively arranged close to the pair of the sieve tubes.

[0010] Furthermore, the outer wall of the screen tube is provided with a plurality of scrapers along the circumferential direction, and the length direction of the scrapers is parallel to the length direction of the screen tube; a driving device for driving the screen tube to rotate is also included; and a pair of the screen tubes have opposite directions of rotation.

[0011] Furthermore, both ends of the sieve tube are rotatably connected to the side wall of the grinding chamber; the driving device includes a driven wheel sleeved on the outer wall of the sieve tube, a motor arranged on the outer wall of the grinding chamber, a driving wheel arranged on the output shaft of the motor, and a transmission belt for connecting the driving wheel and the driven wheel.

[0012] Furthermore, the discharge device includes a screw feeder horizontally arranged at the discharge port of the crushing device, the screw feeder includes a horizontally arranged discharge pipe, a spiral blade rotatably arranged in the discharge pipe, and a feed port opened on the upper side of the discharge pipe; the discharge port of the crushing device is connected to the feed port; the discharge pipe is connected to the guide pipe.

[0013] Furthermore, the discharge device also includes a discharge box covered on the lower side wall of the discharge pipe, and a plurality of connecting pipes arranged on the lower side of the discharge box; a plurality of second sieve holes are provided on the lower side wall of the discharge pipe, and the plurality of second sieve holes are all arranged in the discharge box; the diameter of the second sieve holes is larger than the diameter of the first sieve holes; the lower end of the connecting pipe passes through the top wall of the grinding chamber and is arranged above the first through hole.

[0014] Furthermore, the crushing device is a double-roll crusher.

[0015] The technical scheme of the present invention has at least the following advantages and beneficial effects: the mechanical and airflow composite pulverizing device of the present invention, when in use, puts the material into the crusher for preliminary crushing, and feeds the preliminary crushed granular material into the guide pipe in the feeding device through the discharging device, and enters the air guide pipe through the guide pipe, and the air compressor feeds high-speed gas into the air guide pipe, and the high-speed airflow in the air guide pipe drives the material particles to move at high speed, and sprays them into the grinding chamber at high speed through the blowing pipe, and the particles in the grinding chamber collide with each other and then break into finer powder, and the powder material is driven by the airflow to move upward, and enters the sieve tube after passing through the first sieve hole on the sieve tube, and because the sieve tube is connected with a negative pressure device, the powder will not only be actively sucked into the sieve tube, but also be sucked away in time after entering the sieve tube, and the large particles that are not fully crushed cannot enter the sieve tube, and they will fall in the grinding chamber and continue to collide and crush with the particles blown out of the blowing pipe. In this way, through the preliminary crushing of the crushing device and the subsequent in-depth grinding in the grinding chamber, the material can be effectively crushed into small particles of a specified particle size. And there is no need to use a grinder for repeated grinding, so energy consumption is more controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a mechanical and airflow composite pulverizing device provided in an embodiment of the present invention;

[0017] Figure 2 A schematic structural diagram of the interior of a mechanical and airflow composite pulverizing device provided by an embodiment of the present invention from one perspective;

[0018] Figure 3 A schematic structural diagram of the interior of a mechanical and airflow composite pulverizing device provided by an embodiment of the present invention from two perspectives;

[0019] Figure 4 A schematic diagram of the structure of a discharge device provided in an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the internal structure of a discharge device provided in an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the structure of a screen tube portion provided in an embodiment of the present invention;

[0022] Figure 7 A schematic structural diagram of a feeding device portion provided in an embodiment of the present invention.

[0023] Icons: 10-crushing device, 20-discharging device, 21-discharging pipe, 22-spiral blade, 23-discharging box, 24-second sieve hole, 25-connecting pipe, 30-grinding chamber, 31-sieve pipe, 32-scraper, 33-driving device, 331-driven wheel, 332-motor, 333-driving wheel, 334-transmission belt, 34-guide plate, 35-first through hole, 36-second through hole, 40-feeding device, 41-guide pipe, 42-air guide pipe, 43-air compressor, 44-blowing pipe, 45-Laval tube. DETAILED DESCRIPTION

[0024] Example

[0025] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 7 As shown, the mechanical and airflow composite pulverizing device of this embodiment includes a crushing device 10, a discharge device 20 arranged at the discharge port of the crushing device 10, a grinding chamber 30 arranged below the crushing device 10, a feeding device 40 for connecting the discharge device 20 and the grinding chamber 30, a screen tube 31 arranged at the upper end of the grinding chamber 30, and a negative pressure device connected to one end of the screen tube 31 arranged outside the grinding chamber 30; the part of the screen tube 31 arranged in the grinding chamber 30 is provided with a first sieve hole; the feeding device 40 includes a guide pipe 41 connected to the discharge device 20, a horizontally arranged air guide pipe 42, an air compressor 43 connected to the air guide pipe 42, and a plurality of blowing pipes 44 arranged on the side of the air guide pipe 42; the guide pipe 41 is connected to the side wall of one end of the air guide pipe 42 close to the air compressor 43; the ends of the plurality of blowing pipes 44 away from the air guide pipe 42 are all arranged inside the grinding chamber 30. Specifically, when in use, the material is put into the crusher for preliminary crushing, and the preliminarily crushed granular material is sent to the guide pipe 41 in the feeding device 40 through the discharging device 20, and enters the air guide pipe 42 through the guide pipe 41. The air compressor 43 sends high-speed gas into the air guide pipe 42. The high-speed airflow in the air guide pipe 42 drives the material particles to move at high speed, and is sprayed into the grinding chamber 30 at high speed through the blowing pipe 44. After the particles in the grinding chamber 30 collide with each other, they are crushed into finer powders. The powder material is driven by the airflow to move upward, passes through the first sieve hole on the sieve tube 31 and enters the sieve tube 31. Since the sieve tube 31 is connected to a negative pressure device, the powder will not only be actively sucked into the sieve tube 31, but will also be sucked away in time after entering the sieve tube 31, while the large particles that are not fully crushed cannot enter the sieve tube 31, and they will fall in the grinding chamber 30 and continue to collide and crush with the particles blown out by the blowing pipe 44. In this way, the material can be effectively crushed into small particles of a specified particle size through the initial crushing of the crushing device 10 and the subsequent in-depth grinding in the grinding chamber 30. In addition, there is no need to use a grinder for repeated grinding, so the energy consumption is more controllable.

[0026] In this embodiment, the extended lines of the axes of the parts of the plurality of blowing pipes 44 disposed in the grinding chamber 30 intersect at one point. Specifically, the particles can have a greater chance of collision after being discharged from the blowing pipes 44. A Laval nozzle can be disposed on the air guide pipe 42 to increase the velocity of the airflow to reach sonic or supersonic speed.

[0027] In this embodiment, a hollow guide plate 34 is provided on the upper side of the grinding chamber 30, a first strip-shaped through hole 35 is provided in the middle of the upper side of the guide plate 34, and a second strip-shaped through hole 36 is provided in the middle of the lower side of the guide plate 34; the projection of the guide plate 34 on the plane perpendicular to the length direction of the air guide tube 42 is V-shaped; the second through hole 36 is provided just above the blowing tube 44. Specifically, the powdered material can be discharged through the screen tube 31, and the large particles will fall above the guide plate 34, and then enter the guide tube through the first through hole 35 above the guide plate 34, and then fall back into the grinding chamber 30 through the second through hole 36 below the guide plate 34, at which time these particles can just collide with the particles ejected from the blowing tube 44. The width of the second through hole 36 is only slightly larger than the diameter of the material particles, so the airflow in the grinding chamber 30 will not enter the guide plate 34 through the second through hole 36.

[0028] The projection of the grinding chamber 30 in this embodiment on the plane perpendicular to the length direction of the air guide tube 42 is an inverted triangle structure. A pair of sieve tubes 31 are provided, and the pair of sieve tubes 31 are respectively arranged on both sides of the upper end of the grinding chamber 30, and the length direction of the sieve tubes 31 is parallel to the length direction of the air guide tube 42; the upper ends of the guide plates 34 are respectively arranged close to the pair of sieve tubes 31. Specifically, through the inverted triangle grinding chamber 30 and the V-shaped guide plate 34, the particles or powder can be preferentially and fully contacted with the sieve tube 31, and the powder after screening is discharged from the sieve tube 31, and the large particles enter the guide plate 34 through the first through hole 35.

[0029] The outer wall of the screen tube 31 in this embodiment is provided with a plurality of scrapers 32 along the circumferential direction, and the length direction of the scrapers 32 is parallel to the length direction of the screen tube 31; a driving device 33 for driving the screen tube 31 to rotate is also included; and a pair of screen tubes 31 have opposite directions. Specifically, due to the structure of the grinding chamber 30 and the guide plate 34, the airflow will fully contact the screen tube 31, and the powder can enter the screen tube 31, while the large particles will stay between the scrapers 32 on the surface of the screen tube 31. During the rotation of the screen tube 31, the scrapers 32 can throw the large particles of material onto the guide plate 34, so that all the large particles of material can enter the guide plate 34.

[0030] Both ends of the sieve tube 31 in this embodiment are rotatably connected to the side walls of the grinding chamber 30; the driving device 33 includes a driven wheel 331 sleeved on the outer wall of the sieve tube 31, a motor 332 arranged on the outer wall of the grinding chamber 30, a driving wheel 333 arranged on the output shaft of the motor 332, and a transmission belt 334 for connecting the driving wheel 333 and the driven wheel 331.

[0031] The discharge device 20 in this embodiment includes a screw feeder horizontally arranged at the discharge port of the crushing device 10, the screw feeder includes a horizontally arranged discharge pipe 21, a spiral blade 22 rotatably arranged in the discharge pipe 21, and a feed port opened on the upper side of the discharge pipe 21; the discharge port of the crushing device 10 is connected to the feed port; the discharge pipe 21 is connected to the guide pipe 41. Specifically, the material crushed by the crushing device 10 falls into the discharge pipe 21 and is transported to the guide pipe 41 through the spiral blade 22.

[0032] The discharge device 20 in this embodiment also includes a discharge box 23 covered on the lower side wall of the discharge pipe 21, and a plurality of connecting pipes 25 arranged on the lower side of the discharge box 23; a plurality of second sieve holes 24 are arranged on the lower side wall of the discharge pipe 21, and the plurality of second sieve holes 24 are arranged in the discharge box 23; the diameter of the second sieve holes 24 is greater than the diameter of the first sieve holes; the lower end of the connecting pipe 25 passes through the top wall of the grinding chamber 30 and is arranged above the first through hole 35. Specifically, among the granular materials entering the discharge pipe 21, some have a relatively low particle size, and this part of the materials can be directly discharged into the discharge box 23 through the second sieve holes 24, and then directly sent to the guide plate 34 through the connecting pipe 25.

[0033] The crushing device 10 in this embodiment is a double-roll crusher. Specifically, the crushing device 10 uses a traditional stick crusher, which can perform preliminary crushing.

[0034] In summary, the mechanical and airflow composite pulverizing device of this embodiment, when in use, puts the material into the crusher for preliminary crushing, and sends the preliminarily crushed granular material into the guide pipe 41 in the feeding device 40 through the discharging device 20, and enters the air guide pipe 42 through the guide pipe 41, and the air compressor 43 sends high-speed gas into the air guide pipe 42, and the high-speed airflow in the air guide pipe 42 drives the material particles to move at high speed, and is sprayed into the grinding chamber 30 at high speed through the blowing pipe 44, and the particles in the grinding chamber 30 collide with each other and then are crushed into finer powders, and the powder material is driven by the airflow to move upward, passes through the first sieve hole on the sieve tube 31 and enters the sieve tube 31, because the sieve tube 31 is connected to the negative pressure device, so the powder will not only be actively sucked into the sieve tube 31, but also be sucked away in time after entering the sieve tube 31, and the large particles that are not fully crushed cannot enter the sieve tube 31, and they will fall in the grinding chamber 30 and continue to collide and crush with the particles blown out by the blowing pipe 44. In this way, the material can be effectively crushed into small particles of a specified particle size through the initial crushing of the crushing device 10 and the subsequent in-depth grinding in the grinding chamber 30. In addition, there is no need to use a grinder for repeated grinding, so the energy consumption is more controllable.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical and airflow composite pulverizing device, characterized in that: The invention comprises a crushing device (10), a discharging device (20) arranged at a discharging port of the crushing device (10), a grinding chamber (30) arranged below the crushing device (10), a feeding device (40) for connecting the discharging device (20) and the grinding chamber (30), a screen tube (31) arranged at the upper end of the grinding chamber (30), and a negative pressure device connected to one end of the screen tube (31) arranged outside the grinding chamber (30); The part of the sieve pipe (31) disposed in the grinding chamber (30) is provided with a first sieve hole; the feeding device (40) comprises a material guide pipe (41) connected to the discharge device (20), a horizontally arranged air guide pipe (42), an air compressor (43) connected to the air guide pipe (42), and a plurality of blowing pipes (44) disposed on the side of the air guide pipe (42); the material guide pipe (41) is communicated with a side wall of one end of the air guide pipe (42) close to the air compressor (43); and the ends of the plurality of blowing pipes (44) away from the air guide pipe (42) are all disposed inside the grinding chamber (30).

2. The mechanical and airflow composite pulverizing device according to claim 1, characterized in that: The extended lines of the axes of the parts of the plurality of blowing pipes (44) disposed in the grinding chamber (30) intersect at one point.

3. The mechanical and airflow composite pulverizing device according to claim 1, characterized in that: A hollow guide plate (34) is provided on the upper side of the grinding chamber (30); a first strip-shaped through hole (35) is provided in the middle of the upper side of the guide plate (34); a second strip-shaped through hole (36) is provided in the middle of the lower side of the guide plate (34); a projection of the guide plate (34) on a plane perpendicular to the length direction of the air guide pipe (42) is V-shaped; and the second through hole (36) is provided directly above the blowing pipe (44).

4. The mechanical and airflow composite pulverizing device according to claim 3, characterized in that: The projection of the grinding chamber (30) on a plane perpendicular to the length direction of the air guide pipe (42) is an inverted triangle structure.

5. The mechanical and airflow composite pulverizing device according to claim 4, characterized in that: A pair of the sieve tubes (31) are provided, and the pair of the sieve tubes (31) are respectively arranged on both sides of the upper end of the grinding chamber (30), and the length direction of the sieve tubes (31) is parallel to the length direction of the air guide pipe (42); and both sides of the upper end of the guide plate (34) are respectively arranged close to the pair of the sieve tubes (31).

6. The mechanical and airflow composite pulverizing device according to claim 5, characterized in that: The outer wall of the screen tube (31) is provided with a plurality of scrapers (32) along the circumferential direction, and the length direction of the scrapers (32) is parallel to the length direction of the screen tube (31); It also includes a driving device (33) for driving the screen tubes (31) to rotate; a pair of the screen tubes (31) have opposite rotation directions.

7. The mechanical and airflow composite pulverizing device according to claim 6, characterized in that: Both ends of the sieve tube (31) are rotatably connected to the side wall of the grinding chamber (30); the driving device (33) comprises a driven wheel (331) sleeved on the outer wall of the sieve tube (31), a motor (332) arranged on the outer wall of the grinding chamber (30), a driving wheel (333) arranged on the output shaft of the motor (332), and a transmission belt (334) for connecting the driving wheel (333) and the driven wheel (331).

8. The mechanical and airflow composite pulverizing device according to claim 3, characterized in that: The discharge device (20) comprises a screw feeder horizontally arranged at the discharge port of the crushing device (10), the screw feeder comprising a horizontally arranged discharge pipe (21), a spiral blade (22) rotatably arranged in the discharge pipe (21), and a feed port opened on the upper side of the discharge pipe (21); The discharge port of the crushing device (10) is connected to the feed port; the discharge pipe (21) is connected to the guide pipe (41).

9. The mechanical and airflow composite pulverizing device according to claim 8, characterized in that: The discharge device (20) further comprises a discharge box (23) which is covered on the lower side wall of the discharge pipe (21), and a plurality of connecting pipes (25) which are arranged on the lower side of the discharge box (23); The lower side wall of the discharge pipe (21) is provided with a plurality of second sieve holes (24), and the plurality of second sieve holes (24) are all arranged in the discharge box (23); the diameter of the second sieve holes (24) is greater than the diameter of the first sieve holes; the lower end of the connecting pipe (25) passes through the top wall of the grinding chamber (30) and is arranged above the first through hole (35).

10. The mechanical and airflow composite pulverizing device according to claim 1, characterized in that: The crushing device (10) is a double-roll crusher.

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