Dynamic separation device and sand mill

Abstract

The utility model discloses a dynamic separation device and a sand mill, and the dynamic separation device comprises a transmission shaft which extends along the vertical direction and is of a hollow structure; the separation unit comprises a bottom ring, an outer spiral piece, a gap separator, an inner spiral piece and a top ring, the top ring and the bottom ring are connected to the transmission shaft at intervals in the vertical direction, the outer spiral piece, the inner spiral piece and the gap separator are arranged between the top ring and the bottom ring, and the gap separator is arranged on the outer side of the transmission shaft; a gap separator is arranged on the outer side of the transmission shaft, a communicating hole is formed in the position, right opposite to the gap separator, of the outer side of the transmission shaft, a plurality of outer spiral pieces are arranged outside the gap separator in a surrounding mode at intervals, and a plurality of inner spiral pieces are arranged inside the gap separator in a surrounding mode at intervals. And the separation effect of the grinding medium and the slurry is greatly improved, so that the subsequent procedures of filtering the slurry and the like are reduced, and the overall production efficiency and quality are improved.

Description

Technical Field

[0001] The utility model relates to a grinding device, in particular to a dynamic separation device and a sand mill. Background Art

[0002] In a grinding device, the inside of a cavity is in a mixed state of grinding media and slurry to be ground. In order to effectively separate the grinding media and the slurry, a separation device is usually arranged at the discharge end to separate the grinding media and the slurry. For materials with relatively high fineness requirements, since grinding media with a smaller diameter are required for grinding, if a traditional static separation device is used, there is a risk of material blockage. Therefore, a dynamic separation device is used to separate the material and the grinding media.

[0003] During normal operation, since a dynamic separation method is adopted to separate the grinding media, when the feed pump continuously feeds materials, the dynamic separation device will generate a certain pressure in the grinding cavity when rotating at a high speed. There is a pressure difference between the pressure inside the cavity and the discharge end. At this time, the normal separation of the grinding media and the slurry can be achieved. When the dynamic separation device starts or stops, the rotation speed of the dynamic separation device is relatively low. Since the pressure in the grinding cavity is higher than the pressure at the discharge end, when the linear velocity of the dynamic separation device is insufficient, the critical point for effectively separating the grinding media cannot be reached, resulting in the problem that the grinding media leaks out together with the slurry during the start-stop stage. Therefore, there is an urgent need for a dynamic separation device that can improve the separation effect. Summary of the Invention

[0004] The purpose of the utility model is to provide a dynamic separation device and a sand mill to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0005] The solution of the utility model to solve its technical problems is as follows:

[0006] A dynamic separation device includes: a transmission shaft extending in the vertical direction, and the transmission shaft is of a hollow structure; a separation unit including a bottom ring, an outer spiral sheet, a gap separator, an inner spiral sheet and a top ring. The top ring and the bottom ring are connected to the transmission shaft at intervals in the vertical direction. The outer spiral sheet, the inner spiral sheet and the gap separator are respectively arranged between the top ring and the bottom ring. The gap separator is arranged outside the transmission shaft, and a communication hole is arranged at a position on the outside of the transmission shaft opposite to the gap separator. A plurality of outer spiral sheets are arranged at intervals around the gap separator, and a plurality of inner spiral sheets are arranged at intervals around the gap separator inside.

[0007] The technical solution has at least the following beneficial effects: The drive shaft can transmit the externally input rotational power, driving the entire separation unit to rotate through the drive shaft. The grinding medium and the slurry mixture near the separation unit are driven to rotate. Due to the relatively large weight of the grinding medium, the centrifugal force generated when the grinding medium is driven to rotate by the outer spiral blades is greater, and it is easily thrown outwards. While the mass and particle size of the slurry are smaller, it can reach the gap separator through the channels between two adjacent outer spiral blades, pass through the pores on the gap separator to reach its interior, and under the disturbance of the inner spiral blades, the slurry can better pass through the communication holes to reach the inside of the drive shaft and be discharged outwards along the drive shaft. When the rotational speed of the overall device is relatively low, some of the grinding medium is likely to reach the gap separator through the channels between two adjacent outer spiral blades. At this time, the grinding medium will be blocked by the gap separator and be thrown out again under the eddy current action of the outer spiral blades. In this way, it can effectively ensure that the grinding medium will not leak out together with the slurry when the dynamic separation device rotates at a low speed, greatly improving the separation effect of the grinding medium and the slurry, thereby reducing subsequent processes such as filtering the slurry, and improving the overall production efficiency and quality.

[0008] As a further improvement of the above technical solution, the spiral direction of the inner spiral blades is opposite to that of the outer spiral blades. Since the spiral direction of the inner spiral blades is opposite to that of the outer spiral blades, the inner spiral blades generate an inward swirling suction force under high-speed rotation, which can increase the speed of the slurry passing through the drive shaft, thereby increasing the flow rate. In addition, rapid discharging can generate a certain negative pressure inside the gap separator, thereby reducing the risk of material blockage inside the gap separator.

[0009] As a further improvement of the above technical solution, the extending direction of the communication holes from the outside to the inside is the same as the spiral direction of the inner spiral blades. The slurry rotating under the drive of the inner spiral blades can more easily enter the drive shaft through the communication holes with the same opening direction, thereby further improving the efficiency of the slurry inside the gap separator entering the drive shaft and being output outwards.

[0010] As a further improvement of the above technical solution, the separation unit further includes a guide vane, the guide vane is located between the top ring and the bottom ring, and the guide vane is located between two inner spiral blades. The slurry rotates under the drive of the inner spiral blades and is blocked and guided to the inner spiral blades when passing through the guide vane, enabling the slurry to flow better towards the communication holes on the drive shaft, further improving the efficiency of the slurry inside the gap separator entering the drive shaft and being output outwards.

[0011] As a further improvement of the above technical solution, one end of the outer spiral blade extends to the outside of the bottom ring and extends along the outer circumference of the bottom ring. The part where the outer spiral blade extends along the outer circumference of the bottom ring forms a guiding section, enabling the slurry to enter the channels between two adjacent outer spiral blades along the guidance of the guiding section, improving the overall efficiency.

[0012] As a further improvement of the above technical solution, a plurality of the outer spiral fins and the inner spiral fins are integrally formed on the bottom side of the top ring, and a plurality of the outer spiral fins and the inner spiral fins are integrally formed on the top side of the bottom ring. The plurality of outer spiral fins located on the upper side are respectively connected to the plurality of outer spiral fins located on the lower side, and the plurality of outer spiral fins located on the upper side are respectively connected to the plurality of inner spiral fins located on the lower side. In the separation unit, the bottom side of the top ring and the plurality of outer spiral fins and inner spiral fins form a whole, and the top side of the bottom ring and the plurality of outer spiral fins and inner spiral fins form a whole. During assembly, the plurality of outer spiral fins and inner spiral fins in the two wholes are respectively aligned and connected correspondingly, so that the overall production and assembly can be facilitated.

[0013] As a further improvement of the above technical solution, the gap separator is detachably connected to both the top ring and the bottom ring. The gap separator can be disassembled from the top ring and the bottom ring. When the gap separator is blocked, it can be conveniently maintained separately, improving the use experience.

[0014] As a further improvement of the above technical solution, a plurality of the separation units are arranged along the transmission shaft. In two adjacent separation units, the top ring of one separation unit is connected to the bottom plate of the other separation unit. A plurality of the separation units are arranged in an axial arrangement along the transmission shaft. During use, the transmission shaft drives a plurality of separation units to work simultaneously, effectively improving the separation efficiency of the grinding medium and the slurry.

[0015] A sand mill includes the above dynamic separation device.

[0016] The technical solution has at least the following beneficial effects: After the sand mill finishes grinding the material, it discharges through this dynamic separation device, effectively reducing the mixing of the grinding medium in the slurry, thereby reducing subsequent processes such as filtering the slurry, and improving the overall production efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, not all embodiments. Without creative efforts, those skilled in the art can also obtain other design solutions and drawings based on these drawings.

[0018] Figure 1 It is a side view of the dynamic separation device of the present invention.

[0019] Figure 2 is Figure 1 the schematic cross-sectional structure diagram of A-A of

[0020] Figure 3 isFigure 1 Schematic diagram of the B-B cross-sectional structure

[0021] In the accompanying drawings: 1 - transmission shaft, 11 - communication hole, 21 - bottom ring, 22 - outer spiral fin, 23 - slit separator, 24 - inner spiral fin, 25 - top ring, 26 - guide vane Specific embodiments

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the present utility model in conjunction with the embodiments and the accompanying drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection relationships mentioned in the text do not refer only to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. Each technical feature in the present invention can be combined interactively without mutual contradiction or conflict

[0023] Referring to Figures 1 to 3 , a dynamic separation device, comprising: a transmission shaft 1 extending in the vertical direction, the transmission shaft 1 being of a hollow structure; a separation unit including a bottom ring 21, an outer spiral fin 22, a slit separator 23, an inner spiral fin 24 and a top ring 25, the top ring 25 and the bottom ring 21 being connected to the transmission shaft 1 at intervals in the vertical direction, the outer spiral fin 22, the inner spiral fin 24 and the slit separator 23 being respectively arranged between the top ring 25 and the bottom ring 21, the slit separator 23 being arranged outside the transmission shaft 1, a communication hole 11 being arranged at a position on the outside of the transmission shaft 1 opposite to the slit separator 23, a plurality of the outer spiral fins 22 being arranged at intervals around the outside of the slit separator 23, and a plurality of the inner spiral fins 24 being arranged at intervals around the inside of the slit separator 23

[0024] In this dynamic separation device, the transmission shaft 1 can transmit the externally input rotational power, driving the entire separation unit to rotate through the transmission shaft 1. The grinding medium and the slurry mixture near the separation unit are driven to rotate. Due to the relatively large weight of the grinding medium, the centrifugal force generated when the grinding medium is driven to rotate by the outer spiral blade 22 is greater, and it is easily thrown outwards. While the mass and particle size of the slurry are smaller, it can reach the gap separator 23 through the channels between two adjacent outer spiral blades 22, pass through the pores on the gap separator 23 and reach its interior. Under the disturbance of the inner spiral blade 24, the slurry can better pass through the communication hole 11 and reach inside the transmission shaft 1, and be discharged outwards along the transmission shaft 1. When the rotation speed of the overall device is relatively low, some of the grinding medium is likely to reach the gap separator 23 through the channels between two adjacent outer spiral blades 22. At this time, the grinding medium will be blocked by the gap separator 23 and be thrown out again under the eddy current action of the outer spiral blade 22. In this way, it can effectively ensure that the grinding medium will not leak out together with the slurry when the dynamic separation device rotates at a low speed, greatly improving the separation effect of the grinding medium and the slurry, thereby reducing subsequent processes such as filtering the slurry, and improving the overall production efficiency and quality.

[0025] Furthermore, the spiral direction of the inner spiral blade 24 is opposite to that of the outer spiral blade 22. Since the spiral direction of the inner spiral blade 24 is opposite to that of the outer spiral blade 22, the inner spiral blade 24 generates an inward vortex suction force under high-speed rotation, which can increase the speed of the slurry passing through the transmission shaft 1, thereby increasing the flow rate. In addition, rapid discharging can generate a certain negative pressure inside the gap separator 23, thereby reducing the risk of blockage inside the gap separator 23.

[0026] After the slurry enters the gap separator 23 and generates an eddy current under the drive of the inner spiral blade 24, in order to improve the efficiency of the slurry entering the interior of the transmission shaft 1 from the communication hole 11 in this embodiment, the extending direction of the communication hole 11 from outside to inside is the same as the spiral direction of the inner spiral blade 24. The slurry rotating under the drive of the inner spiral blade 24 can more easily enter the transmission shaft 1 from the communication hole 11 with the same opening direction, thereby further improving the efficiency of the slurry inside the gap separator 23 entering the transmission shaft 1 and being output outwards.

[0027] Furthermore, the separation unit further includes a guide vane 26. The guide vane 26 is located between the top ring 25 and the bottom ring 21, and the guide vane 26 is located between two inner spiral blades 24. The slurry rotates under the drive of the inner spiral blade 24 and is blocked and guided to the inner spiral blade 24 when passing through the guide vane 26, enabling the slurry to flow better towards the communication hole 11 on the transmission shaft 1, further improving the efficiency of the slurry inside the gap separator 23 entering the transmission shaft 1 and being output outwards.

[0028] In some embodiments, one end of the outer spiral piece 22 extends to the outside of the bottom ring 21 and extends along the outer circumference of the bottom ring 21. The part of the outer side of the outer spiral piece 22 extending along the outer circumference of the bottom ring 21 forms a diversion section, so that the slurry enters the channels between two adjacent outer spiral pieces 22 along the guidance of the diversion section, improving the overall efficiency.

[0029] In the above embodiments, for a single outer spiral piece 22 or inner spiral piece 24, the upper and lower ends of the outer spiral piece 22 and the upper and lower ends of the inner spiral piece 24 can be respectively connected to the top ring 25 and the bottom ring 21. However, in this way, the overall production and assembly efficiency is relatively low, and it is necessary to fix a plurality of outer spiral pieces 22 and a plurality of inner spiral pieces 24 on the top ring 25 and the bottom ring 21 respectively. To improve the production and assembly efficiency, in this embodiment, a plurality of the outer spiral pieces 22 and the inner spiral pieces 24 are integrally formed on the bottom side of the top ring 25, and a plurality of the outer spiral pieces 22 and the inner spiral pieces 24 are integrally formed on the top side of the bottom ring 21. The plurality of outer spiral pieces 22 located on the upper side are respectively connected to the plurality of outer spiral pieces 22 located on the lower side, and the plurality of outer spiral pieces 22 located on the upper side are respectively connected to the plurality of inner spiral pieces 24 located on the lower side. In the separation unit, the bottom side of the top ring 25 and a plurality of outer spiral pieces 22 and inner spiral pieces 24 form an integral body, and the top side of the bottom ring 21 and a plurality of outer spiral pieces 22 and inner spiral pieces 24 form an integral body. During assembly, the plurality of outer spiral pieces 22 and inner spiral pieces 24 in the two integral bodies are respectively aligned and connected correspondingly, so that the overall production and assembly can be facilitated.

[0030] In some embodiments, the gap separator 23 is detachably connected to both the top ring 25 and the bottom ring 21. For example, connecting pieces such as screws or bolts can be driven into the top ring 25 and the bottom ring 21 to connect to the ends of the gap separator 23. The gap separator 23 can be disassembled from the top ring 25 and the bottom ring 21. When the gap separator 23 is blocked, it can be conveniently maintained separately, improving the use experience.

[0031] There can be only one separation unit. In this embodiment, a plurality of separation units are arranged along the transmission shaft 1. In two adjacent separation units, the top ring 25 of one separation unit is connected to the bottom plate of the other separation unit. The separation units are arranged in an axial arrangement along the transmission shaft 1. During use, the transmission shaft 1 drives a plurality of separation units to work simultaneously, effectively improving the separation efficiency of the grinding medium and the slurry.

[0032] A sand mill includes the above-mentioned dynamic separation device.

[0033] In this sand mill, after the material grinding is completed, the sand mill discharges materials through this dynamic separation device, effectively reducing the mixing of grinding media in the slurry, thereby reducing subsequent processes such as filtering the slurry, and improving the overall production efficiency and quality.

[0034] The above has specifically described the preferred embodiments of the present utility model, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A dynamic separation device, characterized in that: include: A transmission shaft (1) extending in the up-down direction, the transmission shaft (1) being a hollow structure; A separation unit comprises a bottom ring (21), an outer spiral sheet (22), a gap separator (23), an inner spiral sheet (24) and a top ring (25); the top ring (25) and the bottom ring (21) are connected to the transmission shaft (1) at intervals in the up-down direction; the outer spiral sheet (22), the inner spiral sheet (24) and the gap separator (23) are respectively arranged between the top ring (25) and the bottom ring (21); the gap separator (23) is arranged on the outside of the transmission shaft (1); a connecting hole (11) is arranged on the outside of the transmission shaft (1) at a position facing the gap separator (23); a plurality of the outer spiral sheets (22) are arranged at intervals outside the gap separator (23); and a plurality of the inner spiral sheets (24) are arranged at intervals inside the gap separator (23).

2. A dynamic separation device according to claim 1, characterized in that: The spiral direction of the inner spiral sheet (24) is opposite to the spiral direction of the outer spiral sheet (22).

3. A dynamic separation device according to claim 2, characterized in that: The extending direction of the communicating hole (11) from outside to inside is the same as the spiral direction of the inner spiral sheet (24).

4. A dynamic separation device according to claim 1, characterized in that: The separation unit further comprises a guide vane (26), wherein the guide vane (26) is located between the top ring (25) and the bottom ring (21), and the guide vane (26) is located between the two inner spiral vanes (24).

5. A dynamic separation device according to claim 1, characterized in that: One end of the outer spiral sheet (22) extends to the outside of the bottom ring (21) and extends along the outer circumference of the bottom ring (21).

6. A dynamic separation device according to claim 1, characterized in that: The top ring (25) has a plurality of outer spiral sheets (22) and the inner spiral sheets (24) integrally formed on the bottom side, and the bottom ring (21) has a plurality of outer spiral sheets (22) and the inner spiral sheets (24) integrally formed on the top side; the plurality of outer spiral sheets (22) located on the upper side are respectively connected to the plurality of outer spiral sheets (22) located on the lower side, and the plurality of outer spiral sheets (22) located on the upper side are respectively connected to the plurality of inner spiral sheets (24) located on the lower side.

7. A dynamic separation device according to claim 1, characterized in that: The gap separator (23) is detachably connected to the top ring (25) and the bottom ring (21).

8. A dynamic separation device according to claim 1, characterized in that: A plurality of separation units are arranged along the transmission shaft (1), and in two adjacent separation units, the top ring (25) of one separation unit is connected to the bottom plate of the other separation unit.

9. A sand mill, characterized in that: Comprising the dynamic separation device as claimed in any one of claims 1 to 8.

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