A separator and a grinding machine

Abstract

The present application relates to the field of grinding equipment, and specifically discloses a separator and a grinder, a separator comprising a stator and a rotor, the rotor being rotatably connected to the inner side of the stator, a plurality of through slots being provided on the circumference of the stator, the rotor comprising a top ring, a bottom ring and a plurality of blades fixedly connected between the top ring and the bottom ring, and the top between the rotor and the stator being closed. A grinder comprising a casing, a separator as described in claim 1-6, the separator being arranged in the casing, the stator being fixedly connected in the casing, and a gap being provided between the circumference of the stator and the inner wall of the casing, and the top between the stator and the casing being closed. The present application has the effect of improving the powder selection efficiency.

Description

Technical Field

[0001] The present application relates to the field of grinding equipment, and in particular to a separator and a grinder. Background Art

[0002] At present, airflow grinders are widely used in ceramic pigments, medicine, biochemistry, PVC, etc. In its working state, the airflow enters the grinding chamber, and the airflow drives the material to be repeatedly collided, rubbed, sheared and crushed in the grinding chamber. The crushed material moves to the separator with the rising airflow. Under the action of the separator, the powder of the target particle size is separated, and the powder that does not reach the target particle size continues to be crushed by the airflow.

[0003] In the related art, the separator includes a front impeller disc, a rear impeller disc and a plurality of blades, the blades are fixedly connected between the front and rear impeller discs and form a circle, there is a feed gap between adjacent blades, and a cavity is formed inside a circle of blades. The separation efficiency of the powder is low. Summary of the invention

[0004] In order to improve the separation efficiency, the present application provides a separator and a grinder.

[0005] In a first aspect, the present application provides a separator, which adopts the following technical solution:

[0006] A separator comprises a stator and a rotor, wherein the rotor is rotatably connected to the inner side of the stator, a plurality of through slots are provided on the circumference of the stator, the rotor comprises a top ring, a bottom ring and a plurality of blades fixedly connected between the top ring and the bottom ring, and the top between the rotor and the stator is closed.

[0007] By adopting the above technical solution, when the rotor rotates, negative pressure is generated, and the wind flow carries the powder of the target particle size into the stator from the through slot, and then enters the rotor from between the blades, and the powder of the target particle size is separated from the top of the rotor; when the large particle powder that does not reach the target particle size enters the stator from the through slot, a certain disturbance is generated due to the change of the air flow, and the larger particle powder falls down, and the powder entering the through slot is further impacted by the rotating blades, and the larger particle powder that does not reach the target particle size falls further; thereby During the separation process of powder, large particles of powder will be separated to a certain extent when entering the stator and the rotor, and the separation efficiency of powder of target particle size is improved; when the wind passes through the slot, the wind can cool the stator, so that the stator can maintain a certain temperature and will not cause the resin and other materials with lower melting points to melt; and the powder enters the separator from outside the stator, and the powder of target particle size is separated from the middle of the rotor, and large particles of powder that do not reach the target particle size fall from between the stator and the rotor, so the material is not easy to form a short circuit, and the cavitation phenomenon is greatly slowed down.

[0008] Optionally, a long plate parallel to the axis of the rotor is connected to the inner side of the stator in the circumferential direction, and the long plate is arranged to be inclined along the rotation direction of the rotor.

[0009] By adopting the above technical scheme, the powder entering the stator from the through slot is impacted by the rotor, and the powder with smaller particle size, which is lighter in weight, can still be driven by the wind to enter the middle position of the rotor and be separated, while the powder with larger particle size is impacted by the blades and further impacted with the long plate. After two consecutive impacts, the powder with larger particle size is knocked down and then continues to be ground; thereby, the powder with smaller particle size and the powder with larger particle size can be separated faster and more completely, thereby improving the powder selection efficiency, that is, improving the work efficiency.

[0010] Optionally, a short plate parallel to the rotor axis is connected to the inner side of the stator in the circumferential direction, the short plate is arranged obliquely along the rotation direction of the rotor, the short plate and the long plate are arranged in sequence, and the long plate is opposite to the through slot.

[0011] By adopting the above technical solution, when the wind carries the powder into the stator from the through slot, it hits the side of the long plate away from the rotor axis, and some larger particles of the material fall down. After the wind enters from the through slot, a small vortex is formed at the position of the short plate, so that some larger particles of powder that have not reached the target particle size fall further, which is conducive to the selection of powder with the target particle size; and the formation of the small vortex enables the powder on the long plate to be taken away, and it is not easy for material to accumulate on the long plate.

[0012] Optionally, along the rotation direction of the rotor, a connecting plate is connected between adjacent short plates and long plates, the connecting plate is connected to one end of the long plate and the short plate away from the rotor, and fixing bolts are connected between the connecting plate and the stator.

[0013] By adopting the above technical solution, the connecting plate connects the long plate and the short plate together, and the short plate, the long plate and the connecting plate can be connected to the stator by fixing bolts, so that the connection between the short plate and the long plate and the stator is more convenient.

[0014] Optionally, a connecting portion is integrally connected to one side of the connecting plate connected to the long plate, and connecting bolts are connected between the long plate and the connecting portion.

[0015] By adopting the above technical solution, the long board and the connecting part can be disassembled by unscrewing the connecting bolts, so that the long board can be replaced alone without replacing the long board, the connecting board and the short board as a whole when the long board is damaged; the connecting part strengthens the long board to a certain extent, making the connection between the long board and the connecting board more stable.

[0016] Optionally, a support plate is connected between the side of the short plate facing away from the rotor and the connecting plate.

[0017] By adopting the above technical solution, the support plate supports the short plate, making it difficult for the short plate to deform.

[0018] In a second aspect, the present application provides a grinding machine, which adopts the following technical solution:

[0019] A grinding machine comprises a casing and a separator as described in claims 1 to 6, wherein the separator is arranged in the casing, the stator is fixedly connected in the casing, and there is a gap between the circumference of the stator and the inner wall of the casing, the top between the stator and the casing is closed, and a grinding assembly is arranged in the casing, and the grinding assembly is located below the separator.

[0020] By adopting the above technical solution, there is a certain gap between the stator and the casing, and the rotation of the rotor forms a certain negative pressure. The wind carries small particle powder into the gap between the stator and the casing, then enters the stator from the through slot, and then enters the middle of the rotor from between the rotor blades. The larger particle powder that does not reach the target particle size collides with the stator and the rotating rotor, falls from between the stator and the rotor, and then continues to be ground by the grinding assembly.

[0021] Optionally, the grinding assembly includes a grinding disc and an air flow guide ring, the grinding disc is rotatably connected to the casing, the grinding disc is located below the stator, a grinding hammer is fixedly connected to the edge of the upper surface of the grinding disc, a grinding liner is connected to the inner wall of the casing, the grinding hammer is opposite to the grinding liner, a nozzle ring is between the edge of the grinding disc and the grinding disc, the nozzle ring is connected to the air source, the air flow guide ring is fixedly connected to the casing, the axis of the air flow guide ring is coaxial with the stator, the air flow guide ring is flared upward, the bottom of the air flow guide ring is located above the grinding disc, and the top of the air flow guide ring is opposite to the stator and the casing.

[0022] By adopting the above technical solution, the air source can be a fan, and the material to be ground enters the grinding disc from the casing. The grinding disc rotates to generate centrifugal force, and the material to be ground moves to the edge of the grinding disc. The gas is ejected from the nozzle ring, and the high-speed gas drives the material to move upward and hits the grinding hammer and the grinding liner. The material is repeatedly collided, rubbed, and sheared to be crushed; the material with a smaller particle size is guided by the air flow guide ring, driven by the wind to move upward, and then enters the separator to complete the sorting of particles of the target particle size, and the powder with a larger particle size falls back to the grinding disc to continue grinding.

[0023] Optionally, the grinding hammer includes a grinding part and a fixing part, the grinding part is vertically arranged, the fixing part is horizontally arranged and fixedly connected to the bottom of the grinding part, a notch is opened at the top of the grinding part on one side facing the center of the grinding disk, the bottom of the airflow guide ring is located at the notch, and a countersunk bolt is connected between the fixing part and the grinding disk.

[0024] By adopting the above technical solution, the structure of the grinding hammer is set up so that it can have a larger area in the vertical direction to collide and rub with the material, and the material is ground faster; the countersunk bolt connects the fixing part and the grinding disc, and at the same time, because the top of the countersunk bolt does not protrude from the surface of the fixing part, material accumulation is not easy to occur at the edge of the grinding disc.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By setting up the stator and rotor, large-particle powder will be separated to a certain extent when entering the stator and the rotor, the separation efficiency of the target particle size powder is improved, the material is not easy to short-circuit, and the cavitation phenomenon is greatly slowed down;

[0027] 2. By setting the long plate and the short plate, the powder with larger particle size is hit by the rotor blades and then further hits the long plate, so the powder with larger particle size is separated from the powder with target particle size more quickly and completely, which improves the powder selection efficiency and the overall work efficiency by about 15%. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the separator in Example 1;

[0029] Figure 2 It is a schematic diagram of the overall structure in Example 2;

[0030] Figure 3 is a cross-sectional view of the grinding machine in Example 2 along the axis of the housing;

[0031] Figure 4 yes Figure 3 A schematic diagram of the partially enlarged structure of part A;

[0032] Figure 5 It is a schematic diagram intended to illustrate the structure of a guide cone.

[0033] Explanation of the reference numerals: 1. casing; 11. grinding disc; 12. grinding liner; 13. nozzle ring; 14. discharge port; 15. feed port; 2. grinding hammer; 21. grinding part; 211. notch; 212. countersunk bolt; 22. fixing part; 3. air flow guide ring; 4. guide cone; 41. adjusting bolt; 5. stator; 51. through groove; 52. long plate; 53. connecting plate; 531. fixing bolt; 532. connecting part; 533. connecting bolt; 54. short plate; 541. support plate; 6. rotor; 61. top ring; 62. bottom ring; 621. guide cone; 63. blade. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The embodiment of the present application discloses a separator.

[0036] Example 1

[0037] Reference Figure 1 A separator includes a stator 5 and a rotor 6, both of which are cylindrical and coaxial. The rotor 6 is located on the inner side of the stator 5. The stator 5 is circumferentially provided with a plurality of through slots 51. The through slots 51 can be in various shapes such as long strips, circles, etc. In this embodiment, the through slots 51 are vertical circles. The rotor 6 includes a top ring 61, a bottom ring 62, and a plurality of blades 63 fixedly connected between the top ring 61 and the bottom ring 62. The top ring 61 is rotatably connected to the top of the stator 5, and the top between the rotor 6 and the stator 5 is closed. The bottom end of the stator 5 is open, and the bottom ring 62 is fixedly connected to a guide cone 621 that is tapered upward. The top of the guide cone 621 is connected to a driving motor that drives the rotor 6 to rotate.

[0038] Reference Figure 1 , the inner side of the stator 5 in the circumferential direction is connected with a long plate 52 parallel to the axis of the rotor 6 and a vertical short plate 54, both of which are arranged obliquely along the rotation direction of the rotor 6, and the short plate 54 and the long plate 52 are arranged in sequence, and the short plate 54 and the long plate 52 are located at the vertical edge of the through slot 51, along the rotation direction of the rotor 6, the two sides of the through slot 51 are the long plate 52 and the short plate 54 in sequence, so that the inclined long plate 52 is directly opposite to the through slot 51. After the wind carries the powder into the through slot 51, it first hits the long plate 52, and due to the action of the short plate 54, a small vortex is formed, so that the larger particles of powder are partially separated, and the powder on the surface of the long plate 52 facing the axis of the rotor 6 can be taken away by the small vortex.

[0039] Reference Figure 1 Along the rotation direction of the rotor 6, a connecting plate 53 is connected between the adjacent short plates 54 and long plates 52. The connecting plate 53 is connected to one end of the long plate 52 and the short plate 54 away from the rotor 6. A fixing bolt 531 is connected between the connecting plate 53 and the stator 5, so that the long plate 52 and the short plate 54 are fixed on the stator 5 more conveniently.

[0040] Reference Figure 1 The connecting plate 53 is integrally connected to the long plate 52 at one side thereof, and a connecting bolt 533 is connected between the long plate 52 and the connecting portion 532. The detachable connection of the long plate 52 facilitates replacement of the long plate 52 when it is damaged. A supporting plate 541 is connected between the side of the short plate 54 facing away from the rotor 6 and the connecting plate 53, and the supporting plate 541 supports the short plate 54, so that the position of the short plate 54 is more stable and not easily deformed.

[0041] The implementation principle of a separator in the embodiment of the present application is as follows: the rotor 6 rotates, the gas entrains the powder into the stator 5 from the through slot 51 of the stator 5, the airflow first hits the side of the long plate 52 away from the axis of the rotor 6, and some of the powder with larger particle size falls off, and then the airflow generates a small vortex due to the action of the short plate 54, and the larger particle powder that does not reach the target particle size falls off, and the small vortex allows the powder on the long plate 52 to be taken away, and it is not easy for the long plate 52 to accumulate material, and then the powder in the airflow is further hit by the blade 63 of the rotor 6, and the small particle material is still driven by the wind into the middle of the rotor 6, and the large particle material is hit by the blade 63 and hits the long plate 52, and then falls from between the stator 5 and the rotor 6, and the material is not easy to form a short circuit. In the whole process, the large particle material and the small particle material can be separated faster and more completely, which improves the powder selection efficiency and the work efficiency by about 15%.

[0042] The embodiment of the present application discloses a grinding machine.

[0043] Example 2

[0044] Reference Figure 2 and Figure 3 A grinding machine includes a housing 1 and a separator of Example 1, wherein the separator is arranged in the housing 1, a stator 5 is fixedly connected in the housing 1, and there is a gap between the circumference of the stator 5 and the inner wall of the housing 1, the top between the stator 5 and the housing 1 is closed, a grinding assembly is arranged in the housing 1, and the grinding assembly is located below the separator, a discharge port 14 communicating with the top of the separator is arranged at the top of the housing 1, and a feed port 15 for feeding is arranged at the housing 1. The grinding machine has a higher powder selection efficiency, and the working efficiency is improved by about 15% compared with a separator without a stator 5 but only a rotor 6.

[0045] Reference Figure 3 The grinding assembly includes a grinding disc 11 and an air flow guide ring 3. The grinding disc 11 is rotatably connected to the casing 1. The rotation axis of the grinding disc 11 is coaxial with the rotation axis of the rotor 6. The grinding disc 11 is located below the stator 5. A grinding hammer 2 is fixedly connected to the edge of the upper surface of the grinding disc 11. A grinding liner 12 is connected to the inner wall of the casing 1. The grinding hammer 2 is directly opposite to the grinding liner 12. A nozzle ring 13 is located between the edge of the grinding disc 11 and the grinding disc 11. The nozzle ring 13 is connected to the air source. The air flow guide ring 3 is fixedly connected to the casing 1. The axis of the air flow guide ring 3 is coaxial with the stator 5. The air flow guide ring 3 is expanded upward. The bottom of the air flow guide ring 3 is located above the grinding disc 11. The top of the air flow guide ring 3 is directly opposite to the stator 5 and the casing 1.

[0046] Reference Figure 3 and Figure 4The grinding hammer 2 includes a grinding portion 21 and a fixing portion 22. The grinding portion 21 is vertically arranged, the fixing portion 22 is horizontally arranged and the fixing portion 22 is integrally connected to the bottom of the grinding portion 21. A notch 211 is provided at the top of the grinding portion 21 on one side facing the center position of the grinding disc 11. The bottom of the airflow guide ring 3 is located at the notch 211. A countersunk bolt 212 is connected between the fixing portion 22 and the grinding disc 11.

[0047] Reference Figure 3 and Figure 5 The grinding disc 11 is connected with a guide cone 4, which is slidably connected with the grinding disc 11 along the radial direction of the grinding disc 11, and the guide cone 4 is directly opposite to the grinding disc 11. The guide cone 4 is rotatably connected with an adjusting bolt 41, which passes through the housing 1 and is threadedly connected with the housing 1. The guide cone 4 protrudes from the inner surface of the grinding disc 11. Along the rotation direction of the grinding disc 11, the size of the guide cone 4 protruding from the inner surface of the grinding disc 11 becomes larger. A plurality of guide cones 4 are arranged along the circumference of the grinding disc 11, and the plurality of guide cones 4 are evenly distributed. The adjusting bolt 41 is rotated, and the adjusting bolt 41 drives the guide cone 4 to move along the radial direction of the grinding disc 11, so that the cross-sectional size of the nozzle ring 13 perpendicular to the axis of the grinding disc 11 changes, and the target particle size of the powder sorting can be adjusted. The particle size of the sorted powder can also be further adjusted by changing the rotation speed of the rotor 6, the air volume of the nozzle ring 13 entering from the air source, and the rotation speed of the grinding disc 11.

[0048] The implementation principle of a grinder in an embodiment of the present application is as follows: the material enters the casing 1 from the feed port 15, and then falls onto the grinding disc 11. As the grinding disc 11 rotates, the material is evenly distributed on the edge of the grinding disc 11, and then the material is driven by the airflow blown out by the nozzle ring 13 to move upward. The material is repeatedly collided, rubbed, and sheared to be crushed. The small particle material is driven by the wind flow and moves upward along the outer side of the airflow guide ring 3 until it enters the separator from the through groove 51. Then, the powder material of the target particle size is separated by the separator and discharged from the discharge port 14, and the large particle material falls back to the grinding disc 11 to continue to be ground.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A separator, characterized in that: The invention comprises a stator (5) and a rotor (6), wherein the rotor (6) is rotatably connected to the inner side of the stator (5), a plurality of through slots (51) are provided on the circumferential direction of the stator (5), the rotor (6) comprises a top ring (61), a bottom ring (62) and a plurality of blades (63) fixedly connected between the top ring (61) and the bottom ring (62), and the top between the rotor (6) and the stator (5) is closed; a long plate (52) parallel to the axis of the rotor (6) is connected to the inner side of the circumferential direction of the stator (5), and the long plate (52) is inclined along the rotation direction of the rotor (6); a short plate (54) parallel to the axis of the rotor (6) is connected to the inner side of the circumferential direction of the stator (5), and the short plate (54) is inclined along the rotation direction of the rotor (6); The short plate (54) and the long plate (52) are arranged in sequence along the rotation direction of the rotor (6). The short plate (54) and the long plate (52) are located at the vertical edge of the through slot (51). Along the rotation direction of the rotor (6), the two sides of the through slot (51) are the long plate (52) and the short plate (54) in sequence, so that the inclined long plate (52) faces the through slot (51). After the wind carries the powder into the through slot (51), it first hits the long plate (52), and due to the action of the short plate (54), a small vortex is formed, so that the powder with larger particles that do not reach the target particle size is partially separated, and the powder on the surface of the long plate (52) facing the axis of the rotor (6) can be carried by the small vortex.

2. A separator according to claim 1, characterized in that: Along the rotation direction of the rotor (6), a connecting plate (53) is connected between adjacent short plates (54) and long plates (52), the connecting plate (53) is connected to one end of the long plate (52) and the short plate (54) away from the rotor (6), and a fixing bolt (531) is connected between the connecting plate (53) and the stator (5).

3. A separator according to claim 2, characterized in that: A connecting portion (532) is integrally connected to one side of the connecting plate (53) connected to the long plate (52), and a connecting bolt (533) is connected between the long plate (52) and the connecting portion (532).

4. A separator according to claim 3, characterized in that: A support plate (541) is connected between the side of the short plate (54) facing away from the rotor (6) and the connecting plate (53).

5. A grinding machine, characterized in that: The invention comprises a housing (1) and a separator according to any one of claims 1 to 4, wherein the separator is arranged in the housing (1), the stator (5) is fixedly connected in the housing (1), and there is a gap between the circumference of the stator (5) and the inner wall of the housing (1), the top between the stator (5) and the housing (1) is closed, a grinding assembly is arranged in the housing (1), and the grinding assembly is located below the separator; the grinding assembly comprises a grinding disc (11) and an airflow guide ring (3), the grinding disc (11) is rotatably connected in the housing (1), the grinding disc (11) is located below the stator (5), and the upper surface of the grinding disc (11) A grinding hammer (2) is fixedly connected to the edge of the housing (1), a grinding liner (12) is connected to the inner wall of the housing (1), the grinding hammer (2) and the grinding liner (12) are opposite to each other, a nozzle ring (13) is arranged between the edge of the grinding disc (11) and the grinding disc (11), the nozzle ring (13) is connected to an air source, an airflow guide ring (3) is fixedly connected to the housing (1), an axis of the airflow guide ring (3) is coaxial with the stator (5), the airflow guide ring (3) is expanded upward, the bottom of the airflow guide ring (3) is located above the grinding disc (11), and the top of the airflow guide ring (3) is opposite to between the stator (5) and the housing (1).

6. A grinding machine according to claim 5, characterized in that: The grinding hammer (2) comprises a grinding portion (21) and a fixing portion (22), wherein the grinding portion (21) is arranged vertically, and the fixing portion (22) is arranged horizontally and fixedly connected to the bottom of the grinding portion (21), a notch (211) is provided at the top of the grinding portion (21) on one side facing the center of the grinding disc (11), the bottom of the airflow guide ring (3) is located at the notch (211), and a countersunk bolt (212) is connected between the fixing portion (22) and the grinding disc (11).

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