Powder concentrator with center feeding and circumference distributing functions

Abstract

The powder concentrator comprises a shell assembly, an impeller assembly, an upper driving assembly, a central feeding pipe, a material distributing cone, a material scattering assembly, a coarse material channel, a middle material channel assembly and a fine material channel. The impeller assembly comprises a hollow shaft system, an impeller body, a driven belt wheel, an upper driving motor, a driving belt wheel and a conveying belt; the middle material channel assembly comprises a middle material pipe, a mixed outlet and an independent outlet; the fine material channel is arranged on the side face of the upper end of the shell assembly and connected with a negative pressure air source. According to the powder concentrator, the central feeding pipe is arranged in the hollow shaft system, so that materials cannot impact and wear the hollow shaft system during feeding; and the middle material channel provides two collection modes of a mixed outlet and an independent outlet.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder screening equipment, in particular to a center feeding and circumferential distributing powder screening machine. BACKGROUND

[0002] The three-separation type powder screening machine is driven to rotate by a high-speed motor and a vertical transmission shaft, and the material is uniformly scattered on the scattering disc after entering from the feeding port. Under the action of the fan, the material enters the high-speed airflow with the airflow, and is classified according to the particle size of the material. The coarse powder is thrown to the wall by the centrifugal force and falls into the coarse powder collection cone; the medium-coarse powder continues to rise with the airflow into the secondary powder screening area, the fine powder is discharged through the fine powder port after passing through the impeller, and the medium material falls into the medium powder channel.

[0003] The existing powder screening machine has the following problems: the transmission shaft for controlling the rotation of the impeller is located in the feeding channel, and the material produces impact vibration on the shaft during feeding, causing wear. CONTENT OF THE UTILITY MODEL

[0004] A center feeding and circumferential distributing powder screening machine, comprising a shell assembly, an impeller assembly, an upper driving assembly, a center feeding pipe, a distribution cone, a scattering assembly, a coarse material channel, a medium material channel assembly, and a fine material channel.

[0005] The impeller assembly comprises a hollow shaft system rotatably arranged at the upper end center of the shell assembly, an impeller body arranged at the outer edge of the lower end of the hollow shaft system, and a driven pulley arranged at the upper end of the hollow shaft system.

[0006] The upper driving assembly comprises an upper driving motor arranged at the upper end side of the shell assembly, a driving pulley driven by the output shaft of the upper driving motor, and a transmission belt connecting the driving pulley and the driven pulley.

[0007] The center feeding pipe is fixedly arranged at the upper end center of the shell assembly, and the center feeding pipe penetrates the hollow shaft system.

[0008] The distribution cone is fixed in the inner cavity of the shell assembly below the center feeding pipe.

[0009] The scattering assembly comprises a lower driving motor arranged at the lower end center of the shell assembly, a lower transmission shaft connected with the output shaft of the lower driving motor and inserted into the shell assembly, and a scattering rotor arranged at the upper end of the lower transmission shaft.

[0010] The coarse material channel is arranged at the lower end of the shell assembly.

[0011] The middle material channel assembly at least includes a middle material pipe arranged concentrically below the distribution cone and outside the lower transmission shaft, a mixing outlet arranged on the side of the middle material pipe and leading into the coarse material channel, and an independent outlet arranged on the side of the middle material pipe and penetrating through the coarse material channel; the outer wall of the middle material pipe is provided with a fixed clamping ring, and the outer periphery of the fixed clamping ring is uniformly provided with a fixed pull rod fixed to the inner wall of the shell assembly; the inner wall of the middle material pipe is provided with an inner clamping ring accommodating the lower transmission shaft, and the inner clamping ring is provided with a through hole for accommodating the passing of materials; the mixing outlet is provided with at least two.

[0012] The fine material channel is arranged on the side of the upper end of the shell assembly and is connected to a negative pressure air source.

[0013] Beneficial effects:

[0014] The center feeding and circumferential distributing powder separator disclosed in the application has the advantages that the center feeding pipe is arranged in the hollow shaft system, and the material does not impact and wear the hollow shaft system during feeding.

[0015] The center feeding and circumferential distributing powder separator disclosed in the application has the advantages that two collection methods are provided for the middle material: when the mixing outlet is opened, the middle material is mixed into the coarse material channel through the mixing outlet and discharged; and when the independent outlet is opened, the middle material is discharged through the independent outlet.

[0016] The center feeding and circumferential distributing powder separator disclosed in the application has the advantages that the hollow shaft system of the impeller and the lower transmission shaft of the material distributing rotor are respectively driven, and the rotating speeds of the impeller and the material distributing rotor can be respectively adjusted.

[0017] The center feeding and circumferential distributing powder separator disclosed in the application has the advantages that the distribution cone is directly subjected to the impact of the material, the wear-resistant top cover can increase the durability of the distribution cone, and the distribution cone is detachably assembled through the lower edge of the vertical cone, so that the distribution cone can be conveniently replaced when damaged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of an embodiment of the powder separator.

[0019] Figure 2 is a schematic view of another embodiment of the powder separator.

[0020] Figure 3 is a schematic view of an embodiment of the distribution cone.

[0021] Figure 4 is a sectional view of an embodiment of the distribution cone.

[0022] In the drawings:

[0023] 1. shell assembly;

[0024] 2. impeller assembly, 21. hollow shaft system, 22. impeller body, 23. driven pulley;

[0025] 3. central feed pipe;

[0026] 4. distribution cone, 41. central vertical pipe, 42. built-in upper cone, 43. built-out lower cone, 44. raw material passage, 45. lower material passage hole, 46. material distribution vertical cone, 47. wear-resistant top cover, 48. vertical cone lower edge;

[0027] 5. material distribution assembly, 51. lower drive motor, 52. lower transmission shaft, 53. material distribution rotor;

[0028] 6. coarse material passage;

[0029] 7. medium material passage assembly, 71. medium material pipe, 72. mixing outlet, 73. independent outlet;

[0030] 8. fine material passage;

[0031] 9. upper drive assembly, 91. upper drive motor, 92. driving pulley, 93. transmission belt;

[0032] 10. air inlet passage. DETAILED DESCRIPTION

[0033] A central feeding and circumferential distributing powder separator, comprising a shell assembly 1, an impeller assembly 2, an upper drive assembly 9, a central feed pipe 3, a distribution cone 4, a material distribution assembly 5, a coarse material passage 6, a medium material passage assembly 7, a fine material passage 8;

[0034] The impeller assembly 2 comprises a hollow shaft system 21 rotatably arranged at the center of the upper end of the shell assembly 1, an impeller body 22 arranged at the outer edge of the lower end of the hollow shaft system 21, and a driven pulley 23 arranged at the upper end of the hollow shaft system 21;

[0035] The upper drive assembly 9 comprises an upper drive motor 91 arranged at the side of the upper end of the shell assembly 1, a driving pulley 92 driven by the output shaft of the upper drive motor 91, and a transmission belt 93 connecting the driving pulley 92 and the driven pulley 23;

[0036] The central feed pipe 3 is fixedly arranged at the center of the upper end face of the shell assembly 1, and the central feed pipe 3 penetrates the hollow shaft system 21;

[0037] The distribution cone 4 is fixed in the inner cavity of the shell assembly 1 below the central feed pipe 3;

[0038] The material distribution assembly 5 comprises a lower drive motor 51 arranged at the center of the lower end of the shell assembly 1, a lower transmission shaft 52 connected with the output shaft of the lower drive motor 51 and inserted into the shell assembly 1, and a material distribution rotor 53 arranged at the upper end of the lower transmission shaft 52;

[0039] The coarse material channel 6 is arranged at the lower end of the shell assembly 1.

[0040] The medium material channel assembly 7 at least includes a medium material pipe 71 arranged concentrically outside the lower transmission shaft 52 below the material distribution cone 4, a mixing outlet 72 arranged at the side of the medium material pipe 71 and leading into the coarse material channel 6, and an independent outlet 73 arranged at the side of the medium material pipe 71 and penetrating through the coarse material channel 6; the outer wall of the medium material pipe 71 is provided with a fixed clamping ring 74, and the outer periphery of the fixed clamping ring 74 is circumferentially and uniformly provided with fixed pull rods 75 fixed to the inner wall of the shell assembly 1; the inner wall of the medium material pipe 71 is provided with an inner clamping ring accommodating the lower transmission shaft 52, and the inner clamping ring is provided with through holes for accommodating the passing of materials; the mixing outlet 72 is provided with at least two.

[0041] The fine material channel 8 is arranged at the upper end of the shell assembly 1 and is connected to a negative pressure air source, so that a negative pressure is generated in the shell assembly 1; the negative pressure air source is an induced draft fan.

[0042] The present application provides a more durable material distribution cone:

[0043] The material distribution cone 4 includes a central vertical pipe 41, an inner upper cone 42 arranged above the outer wall of the central vertical pipe 41, an outer lower cone 43 arranged at the middle of the outer wall of the central vertical pipe 41, a raw material channel 44 penetrating through the inner upper cone 42 and the outer lower cone 43, a lower material flow hole 45 circumferentially and uniformly arranged at the central vertical pipe 41 between the inner upper cone 42 and the outer lower cone 43, and a material dispersing vertical cone 46 arranged at the upper end of the central vertical pipe 41 and having a narrow upper end and a wide lower end.

[0044] It should be noted that:

[0045] The upper end of the material dispersing vertical cone 46 is provided with a wear-resistant top cover 47.

[0046] The lower end of the material dispersing vertical cone 46 is provided with a vertical cone lower edge 48, which is detachably connected to the central vertical pipe 41 by bolts.

[0047] Based on the above-mentioned powder selection machine technical scheme, the powder selection process is as follows:

[0048] The material is fed through the central feed pipe 3 and falls into the material distribution cone 4, the material dispersing vertical cone 46 uniformly disperses the material to make it fall into the upper part of the material scattering rotor 53 through the raw material channel 44, and then uniformly falls into the lower part of the shell assembly 1 (the raw material feeding route is shown in the attached drawings Figure 1 Medium route m);

[0049] Firstly, the coarse material directly falls into the coarse material channel 6 and is discharged therefrom;

[0050] Then, the medium material and the fine material are lifted by the negative pressure, wherein:

[0051] Fine materials pass through the impeller body 22 and enter the fine material channel 8;

[0052] Medium materials cannot pass through the impeller body 22 and thus fall again between the built-in upper cone 42 and the built-out lower cone 43 of the distribution cone 4, and then slide into the medium material channel assembly 7 (medium material route, refer to the description of the accompanying drawings) Figure 1 Medium route n).

[0053] It should be noted that the medium materials falling into the medium material channel assembly 7 can be selected to be mixed into the coarse material and discharged, or can be selected to be discharged alone:

[0054] Opening the mixed outlet 72, the medium materials are mixed into the coarse material channel 6 and discharged through the mixed outlet 72;

[0055] Or

[0056] Opening the independent outlet 73, the medium materials are discharged alone through the independent outlet 73.

Claims

1. A sifter of the type that feeds centrally and distributes circumferentially, comprising a housing assembly (1), characterized in that: Also include: Impeller assembly (2), including rotatable set in the housing assembly (1) on the upper end of the center of the hollow shaft system (21), set in the hollow shaft system (21) lower end of the outer edge of the impeller body (22), set in the hollow shaft system (21) on the upper end of the driven pulley (23); Upper drive assembly (9), including set in the housing assembly (1) on the upper end of the side of the upper drive motor (91), driven by the output shaft of the upper drive motor (91) driving the drive pulley (92), the transmission belt (93) connecting the drive pulley (92) and the driven pulley (23); Center feeding pipe (3), fixedly arranged in the housing assembly (1) on the upper end of the center, the center feeding pipe (3) through the hollow shaft system (21) is provided; Distributing cone (4), fixed in the housing assembly (1) inner cavity located below the center feeding pipe (3) place; Spreading assembly (5), including setting in the housing assembly (1) lower end of the center of the lower drive motor (51), connected with the lower drive motor (51) output shaft and inserted into the housing assembly (1) of the lower transmission shaft (52), set in the lower transmission shaft (52) on the upper end of the spreading rotor (53); Coarse material channel (6), set in the lower end of the housing assembly (1); Medium material channel assembly (7), at least including set in the distributing cone (4) below and concentrically arranged on the outer edge of the lower transmission shaft (52) of the medium material pipe (71), set in the medium material pipe (71) side and into the coarse material channel (6) of the mixing outlet (72), also including set in the medium material pipe (71) side and through the coarse material channel (6) of the independent outlet (73); Fine material channel (8), set in the upper end of the housing assembly (1) side and connected to the negative pressure air source.

2. According to claim 1, a kind of center feeding circumferential material distribution's powder selecting machine, it is characterized in that: The distributing cone (4) includes central longitudinal pipe (41), built-in upper cone (42) arranged on the outer wall of central longitudinal pipe (41) upper side, outer lower cone (43) arranged on the outer wall of central longitudinal pipe (41) middle part, raw material channel (44) through built-in upper cone (42) and outer lower cone (43) setting, lower material hole (45) circumferentially arranged in the central longitudinal pipe (41) between built-in upper cone (42) and outer lower cone (43), upper narrow lower wide material relief vertical cone (46) is arranged on the upper end of the central longitudinal pipe (41).

3. According to claim 2, a kind of center feeding circumferential material distribution's powder selecting machine, it is characterized in that: The outer wall of the medium material pipe (71) is provided with fixed snap ring (74), and the outer periphery of the fixed snap ring (74) is circumferentially uniformly distributed with the fixed pull rod (75) fixed with the inner wall of the housing assembly (1).

4. According to claim 3, a kind of center feeding circumferential material distribution's powder selecting machine, it is characterized in that: The inner wall of the medium material pipe (71) is provided with built-in snap ring for accommodating the lower transmission shaft (52), and the built-in snap ring is provided with through hole for accommodating material passing.

5. According to claim 4, a kind of center feeding circumferential material distribution's powder selecting machine, it is characterized in that: The negative pressure air source is induced draft fan.

6. According to claim 5, a kind of center feeding circumferential material distribution's powder selecting machine, it is characterized in that: The mixing outlet (72) is provided with at least two.

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