Ultramicro stone mill

Abstract

The utility model discloses an ultramicro stone mill and belongs to the technical field of stone mills. Comprising a stone mill shell, a shaft sleeve cavity, a grinding cavity and a power installation chamber are arranged in the stone mill shell, a feeding port and a discharging port are formed in the stone mill shell, and an upper grinding disc and a lower grinding disc are arranged in the grinding cavity; a cavity jacket is arranged in the shaft sleeve cavity, the lower millstone is arranged on the transmission shaft seat, a shaft body on the transmission shaft seat penetrates through the cavity jacket, a labyrinth lantern ring is arranged between a seat body on the transmission shaft seat and the cavity jacket, one end of the labyrinth lantern ring is embedded in a sinking deep groove formed in the top of the cavity jacket, and an air inlet hole is formed in the bottom of the sinking deep groove; a sealing ring is arranged between the sinking deep groove and the labyrinth lantern ring, and a sealing gas circuit is arranged on the labyrinth lantern ring; according to the ultra-micro stone mill disclosed by the utility model, the grinding cavity can be isolated from the external environment by introducing positive-pressure gas into the grinding cavity, so that the sealing performance is improved, and the application range and the processing effect of the stone mill are increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of stone grinders, and particularly relates to an ultrafine stone grinder. Background Art

[0002] A stone mill is a machine used to process grains such as rice, wheat, and beans into powder or pulp. With the continuous progress of technology, existing stone mills can be mechanically driven and have relatively high grinding precision and efficiency. Currently, stone mills are widely used in fields such as food processing and pharmaceuticals.

[0003] However, when traditional stone mills are usually in the grinding operation, air in the environment easily enters the grinding chamber. For some special raw materials, they will react when contacting the ambient air. Therefore, to a certain extent, it limits the applicable range and processing effect of the stone mill. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an ultrafine stone grinder, which can isolate the grinding chamber from the external environment by introducing positive pressure gas into the grinding chamber, improve the sealing performance, and thus increase the applicable range and processing effect of the stone mill.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: an ultrafine stone grinder, including a stone mill housing. A grinding chamber and a power installation chamber are arranged in the stone mill housing and are connected through a bushing cavity. The stone mill housing is provided with a feed inlet and a discharge outlet that communicate with the grinding chamber. An upper grinding disc and a lower grinding disc are arranged in the grinding chamber opposite to each other and coaxially arranged in the vertical direction. The upper grinding disc and the lower grinding disc are in a circular ring shape and are coaxially arranged with the feed inlet.

[0006] A cavity jacket is embedded in the bushing cavity. The lower grinding disc is arranged on a transmission shaft seat. The shaft on the transmission shaft seat passes through the cavity jacket movably. A labyrinth collar is arranged between the seat on the transmission shaft seat and the cavity jacket and is sleeved on the shaft. One end of the labyrinth collar is embedded in a sunken deep groove opened at the top of the cavity jacket. An air inlet hole is arranged at the bottom of the sunken deep groove.

[0007] A sealing ring is arranged between the outer peripheral side wall of the sunken deep groove and the outer periphery of the labyrinth collar. A sealing air path that can communicate the bottom of the seat with the top of the shaft is arranged on the labyrinth collar.

[0008] A power module capable of driving the transmission shaft seat to rotate and a distance adjustment mechanism capable of driving the transmission shaft seat to vertically lift are arranged in the power installation chamber.

[0009] Optionally, a spline sleeve is provided at one end of the shaft body connected to the power module, and the spline sleeve is slidably connected to the power module in the vertical direction;

[0010] The spacing adjustment mechanism includes a turbine horizontally arranged in the power installation chamber and a worm provided on the stone mill housing. One end of the worm passes through the stone mill housing and meshes with the turbine. An elevating inner ring that can abut against the shaft body is threadedly connected to the turbine in the vertical direction. An adjusting handwheel is provided at one end of the worm outside the stone mill housing.

[0011] Optionally, the grinding chamber is arranged at the top of the stone mill housing, and the top of the grinding chamber is open. A cover is hinged to the top of the stone mill housing. The feed inlet and the upper grinding disc are both arranged on the cover, and a fastener is arranged between the cover and the stone mill housing.

[0012] Optionally, a gas spring is arranged between the cover and the stone mill housing.

[0013] Optionally, a protection switch that can abut against the cover is arranged on the stone mill housing.

[0014] Optionally, the fastener includes a shaft column rotatably connected to the stone mill housing. A knurled thread knob is threadedly connected to the shaft column, and a U-shaped notch that can embed the knurled thread knob is arranged on the cover. The knurled thread knob can press down on the cover.

[0015] Optionally, one end of the shaft body extends between the upper grinding disc and the lower grinding disc, and a dispersing nut is threadedly connected to the end of the shaft body extending between the upper grinding disc and the lower grinding disc. A plurality of groups of blades are arranged on the outer periphery of the dispersing nut.

[0016] Optionally, the discharge port is arranged on the outer periphery of the bottom of the grinding chamber, and a plurality of groups of material deflecting plates are arranged at the bottom of the seat body.

[0017] Optionally, flange connection parts are arranged at the ends of the feed inlet and the discharge port.

[0018] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: By externally connecting a positive pressure air source through the air inlet hole, the positive pressure air source can enter the sinking groove. The positive pressure air source will enter the gap between the shaft body and the labyrinth collar through the gap between the labyrinth collar and the inner peripheral side wall of the sinking deep groove, and then enter the gap between the labyrinth collar and the seat body through the sealing air path, and then enter the grinding cavity. That is, the positive pressure gas introduced through the air inlet hole can effectively prevent materials from entering the gap between the shaft body and the cavity jacket, reduce the entry of dust, and improve the service life of the transmission shaft seat; At the same time, by introducing positive pressure gas into the grinding cavity in this way, the grinding cavity can be in a positive pressure state, which can effectively isolate the grinding cavity from the external environment, improve the sealing performance, and effectively increase the applicable range and processing effect of the stone mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 is a schematic side view structure diagram of an ultrafine stone mill in a preferred embodiment of the present utility model;

[0021] Figure 2 is a schematic top view structure diagram of an ultrafine stone mill in a preferred embodiment of the present utility model;

[0022] Figure 3 is in a preferred embodiment of the present utility model Figure 2 is a schematic cross-sectional structure diagram at A-A;

[0023] Among them, 1. Stone mill housing; 2. Feed inlet; 3. Discharge outlet; 4. Upper grinding disc; 5. Lower grinding disc; 6. Cavity jacket; 601. Sinking deep groove; 602. Air inlet hole; 7. Transmission shaft seat; 701. Shaft body; 702. Seat body; 8. Labyrinth collar; 9. Sealing ring; 10. Power module; 11. Spline sleeve; 12. Turbine; 13. Worm; 14. Lifting inner ring; 15. Adjusting handwheel; 16. Cover; 1601. U-shaped notch; 17. Gas spring; 18. Protection switch; 19. Shaft column; 20. Knurled thread knob; 21. Scattering nut; 2101. Blade; 22. Feeding blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Now, the present utility model will be further described in detail with reference to the drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0025] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] As Figures 1-3 shown, a superfine stone mill includes a stone mill housing 1. Inside the stone mill housing 1, a grinding chamber and a power installation chamber are provided and connected through a bushing cavity. On the stone mill housing 1, a feed inlet 2 and a discharge outlet 3 connected to the grinding chamber are provided. Inside the grinding chamber, an upper grinding disc 4 and a lower grinding disc 5 are arranged opposite to each other and coaxially in the vertical direction. The upper grinding disc 4 and the lower grinding disc 5 are annular and coaxially arranged with the feed inlet 2. A cavity jacket 6 is embedded in the bushing cavity. The lower grinding disc 5 is arranged on a transmission shaft seat 7. The shaft body 701 on the transmission shaft seat 7 passes through the cavity jacket 6 movably. Between the seat body 702 on the transmission shaft seat 7 and the cavity jacket 6, a labyrinth collar 8 sleeved on the shaft body 701 is provided. One end of the labyrinth collar 8 is embedded in a sunken deep groove 601 opened at the top of the cavity jacket 6. An air inlet hole 602 is provided at the bottom of the sunken deep groove 601. A sealing ring 9 is provided between the outer peripheral side wall of the sunken deep groove 601 and the outer periphery of the labyrinth collar 8. On the labyrinth collar 8, a sealing air path capable of connecting the bottom of the seat body 702 and the top of the shaft body 701 is provided. Inside the power installation chamber, a power module 10 capable of driving the transmission shaft seat 7 to rotate and a distance adjustment mechanism capable of driving the transmission shaft seat 7 to vertically lift and lower are provided.

[0027] Specifically, the air inlet hole 602 can be externally connected to a positive pressure gas source, such as inert gases like nitrogen and argon. When the stone mill in this technical solution is working, the feed port 2 and the discharge port 3 can be hermetically docked with the blanking device and the material receiving device in the prior art respectively. When the power module 10 drives the transmission shaft seat 7 to rotate at a high speed, the positive pressure gas source externally connected to the air inlet hole 602 can enter the sinking groove. Since the sealing ring 9 can dynamically seal the gap between the outer peripheral side wall of the sinking deep groove 601 and the labyrinth collar 8, the positive pressure gas source will enter the gap between the shaft body 701 and the labyrinth collar 8 through the gap between the labyrinth collar 8 and the inner peripheral side wall of the sinking deep groove 601, and then enter the gap between the labyrinth collar 8 and the seat body 702 through the sealing air path, and then enter the grinding cavity. That is, the positive pressure gas introduced through the air inlet hole 602 can effectively prevent materials from entering the gap between the shaft body 701 and the cavity jacket 6, reduce the entry of dust, and improve the service life of the transmission shaft seat 7; at the same time, by introducing inert gas into the grinding cavity in this way, the grinding cavity is in a positive pressure state, which can effectively isolate the grinding cavity from the external environment and improve the sealing performance.

[0028] As described above, in this technical solution, the materials entering through the feed port 2 will directly enter the grinding area formed between the upper grinding disc 4 and the lower grinding disc 5 through the circular upper grinding disc 4. Relying on the high-speed rotation of the lower grinding disc 5, the materials can be evenly dispersed in the grinding area by centrifugal force. To increase the grinding efficiency, the side of the upper grinding disc 4 facing the lower grinding disc 5 and the side of the lower grinding disc 5 facing the upper grinding disc 4 are both in an arc shape concave outward, that is, the distance between the upper grinding disc 4 and the lower grinding disc 5 gradually decreases from the central axis outward; and to increase the grinding effect, several groups of misaligned grinding grooves are provided on the side of the upper grinding disc 4 facing the lower grinding disc 5 and the side of the lower grinding disc 5 facing the upper grinding disc 4 to increase the shearing force of the upper grinding disc 4 and the lower grinding disc 5 on the materials.

[0029] Furthermore, as Figure 3 shown, a spline sleeve 11 is provided at one end of the shaft body 701 connected to the power module 10, and the spline sleeve 11 is slidably connected to the power module 10 in the vertical direction; the spacing adjustment mechanism includes a turbine 12 arranged horizontally in the power installation chamber and a worm 13 arranged on the stone mill housing 1. One end of the worm 13 passes through the stone mill housing 1 and meshes with the turbine 12. A lifting inner ring 14 that can abut against the shaft body 701 is threadedly connected to the turbine 12 in the vertical direction, and an adjustment handwheel 15 is provided at one end of the worm 13 outside the stone mill housing 1.

[0030] As mentioned above, the power module 10 is a high torque motor in the prior art, and the high torque motor can drive the transmission shaft seat 7 to rotate by chain drive, belt drive, etc. In this technical solution, in order to reduce production costs, the high torque motor is directly connected to the transmission shaft seat 7 through the spline sleeve 11, and the output shaft of the high torque motor is a spline shaft, which can be embedded in the spline sleeve 11 along the central axis direction of the spline sleeve 11, that is, the high torque motor is connected to the transmission shaft seat 7 in a floating manner.

[0031] As mentioned above, a circulating water circuit may be provided in the cavity jacket 6 to quickly and efficiently cool the shaft 701 rotating at a high speed.

[0032] A limit position is set between the lifting inner ring 14 and the stone mill housing 1, and the lifting inner ring 14 can only be lifted vertically along the direction of the central axis of the shaft body 701, and cannot rotate. When the worm 13 is twisted by adjusting the hand wheel 15, the lifting inner ring 14 can be driven to lift vertically through the turbine 12, thereby driving the lower grinding disc 5 to move closer to or away from the upper grinding disc 4, so as to achieve the effect of adjusting the distance between the upper grinding disc 4 and the lower grinding disc 5. The lifting structure formed between the turbine 12 and the worm 13 in this technical solution can be tighter and more precise.

[0033] Furthermore, in order to facilitate the inspection of the wear of the upper grinding disc 4 and the lower grinding disc 5 and provide a working space for routine maintenance inside the equipment, as Figure 3 As shown, the grinding chamber is arranged at the top of the mill housing 1, and the top of the grinding chamber is open. A cover 16 is hinged on the top of the mill housing 1, and the feed port 2 and the upper grinding disc 4 are both arranged on the cover 16. A fastener is arranged between the cover 16 and the mill housing 1. The cover 16 and the mill housing 1 can be connected and fixed by fasteners, and a sealing gasket, a rubber gasket, etc. can be arranged between the cover 16 and the mill housing 1 to ensure air tightness. By opening and closing the cover 16, the upper grinding disc 4 and the lower grinding disc 5 can be quickly checked, which is convenient for daily maintenance.

[0034] In this embodiment, in order to facilitate opening and closing of the cover 16, a gas spring 17 is provided between the cover 16 and the mill housing 1. Specifically, the place where the cover 16 is hinged with the mill housing 1 is used as a fulcrum, and the gas spring 17 is connected near the fulcrum. When the operator lifts the cover 16, the gas spring 17 acts on the cover 16 like a pry bar, thereby assisting the operator to lift the cover 16, saving effort and improving safety during operation.

[0035] Furthermore, in order to further improve the safety of the stone mill, a protection switch 18 that can interfere with the cover 16 is provided on the stone mill housing 1, and the protection switch 18 is electrically connected to the power module 10; that is, only when the cover 16 is fully pressed down and fixed on the stone mill housing 1, the equipment can be powered on.

[0036] The above, such as Figure 1As shown, the fastener includes a shaft column 19 rotatably connected to the housing 1 of the stone mill. A knurled threaded knob 20 is threadedly connected to the shaft column 19, and a U-shaped notch 1601 capable of embedding the knurled threaded knob 20 is provided on the cover 16. The knurled threaded knob 20 can press down on the cover 16. When fixing the cover 16 to the housing 1 of the stone mill, the knurled threaded knob 20 can be first flipped so that its rod body is embedded in the U-shaped notch 1601, and then by rotating the knurled threaded knob 20 threadedly connected to the shaft column 19, the head part on the knurled threaded knob 20 can be pressed down on the cover 16.

[0037] Further, one end of the shaft body 701 extends between the upper grinding disc 4 and the lower grinding disc 5, and a material scattering nut 21 is threadedly connected to the end of the shaft body 701 extending between the upper grinding disc 4 and the lower grinding disc 5. A plurality of groups of blades 2101 are provided on the outer periphery of the material scattering nut 21. The material scattering nut 21 rotates synchronously with the shaft body 701, and the materials are broken or scattered by the blades 2101 to improve the grinding efficiency.

[0038] Further, the discharge port 3 is arranged on the outer periphery of the bottom of the grinding chamber, and a plurality of groups of material pushing blades 22 are provided at the bottom of the seat body 702. The materials after grinding will enter the bottom of the grinding chamber through the gap between the upper grinding disc 4 and the lower grinding disc 5 or directly pass through the discharge port 3 driven by a positive pressure air source. The material pushing blades 22 rotating synchronously with the seat body 702 can push the materials scattered at the bottom of the grinding chamber and push the materials to the discharge port 3 to prevent the materials from piling up and affecting the working state and working efficiency of the stone mill.

[0039] Further, flange connection parts are provided at the ends of both the feed port 2 and the discharge port 3, which is convenient for connecting the feed port 2 and the discharge port 3 to external equipment.

[0040] Working principle: When the stone mill works, the power module 10 drives the transmission shaft seat 7 to rotate at a high speed. The air inlet hole 602 is externally connected to a positive pressure air source. The material enters from the feed port 2. The bulk material nut 21 rotates synchronously with the transmission shaft seat 7, and the material is broken or dispersed through the blades 2101, so that the material is evenly dispersed in the grinding area between the upper grinding disc 4 and the lower grinding disc 5. At the same time, under the action of centrifugal force, the material can quickly and efficiently enter between the upper grinding disc 4 and the lower grinding disc 5 for grinding. During this process, the positive pressure air source will enter the gap between the shaft body 701 and the labyrinth collar 8 through the gap between the labyrinth collar 8 and the inner peripheral side wall of the sinking deep groove 601, and then enter the gap between the labyrinth collar 8 and the seat body 702 through the sealing air path, and then enter the grinding cavity. The positive pressure gas introduced through the air inlet hole 602 can effectively prevent the material from entering the gap between the shaft body 701 and the cavity jacket 6, reduce the entry of dust, and improve the service life of the transmission shaft seat 7; at the same time, by introducing inert gas into the grinding cavity in this way, the grinding cavity is in a positive pressure state, which can effectively isolate the grinding cavity from the external environment and improve the sealing performance. Subsequently, the ground material can enter the bottom of the grinding cavity through the gap between the upper grinding disc 4 and the lower grinding disc 5 or directly pass through the discharge port 3 under the drive of the positive pressure air source. The deflector 22 that rotates synchronously with the seat body 702 can deflect the material scattered at the bottom of the grinding cavity and push the material to the discharge port 3 to prevent material accumulation.

[0041] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. An ultrafine stone mill, characterized in that: It includes a stone mill housing (1). Inside the stone mill housing (1), there is a grinding chamber and a power installation chamber connected through a bushing cavity. On the stone mill housing (1), there are a feed inlet (2) and a discharge outlet (3) connected to the grinding chamber. Inside the grinding chamber, there are an upper grinding disc (4) and a lower grinding disc (5) arranged oppositely and coaxially in the vertical direction. The upper grinding disc (4) and the lower grinding disc (5) are annular and coaxially arranged with the feed inlet (2). A cavity jacket (6) is embedded in the bushing cavity. The lower grinding disc (5) is arranged on a transmission shaft seat (7). The shaft body (701) on the transmission shaft seat (7) movably passes through the cavity jacket (6). Between the seat body (702) on the transmission shaft seat (7) and the cavity jacket (6), there is a labyrinth collar (8) sleeved on the shaft body (701). One end of the labyrinth collar (8) is embedded in a sunken deep groove (601) opened at the top of the cavity jacket (6). An air inlet hole (602) is arranged at the bottom of the sunken deep groove (601). A sealing ring (9) is arranged between the outer peripheral side wall of the sunken deep groove (601) and the outer periphery of the labyrinth collar (8). On the labyrinth collar (8), there is a sealing air path capable of connecting the bottom of the seat body (702) and the top of the shaft body (701). Inside the power installation chamber, there is a power module (10) capable of driving the transmission shaft seat (7) to rotate and a spacing adjustment mechanism capable of driving the transmission shaft seat (7) to vertically lift.

2. The ultrafine stone mill according to claim 1, characterized in that: One end of the shaft body (701) connected to the power module (10) is provided with a spline sleeve (11). The spline sleeve (11) is slidably connected to the power module (10) in the vertical direction. The spacing adjustment mechanism includes a turbine (12) arranged horizontally in the power installation chamber and a worm (13) arranged on the stone mill housing (1). One end of the worm (13) passes through the stone mill housing (1) and meshes with the turbine (12). On the turbine (12), there is a lifting inner ring (14) threadedly connected in the vertical direction and capable of abutting against the shaft body (701). One end of the worm (13) located outside the stone mill housing (1) is provided with an adjusting handwheel (15).

3. The ultrafine stone mill according to claim 1, wherein: The grinding chamber is arranged at the top of the stone mill housing (1), and the top of the grinding chamber is open. A cover (16) is hinged to the top of the stone mill housing (1). The feed inlet (2) and the upper grinding disc (4) are both arranged on the cover (16). A fastener is arranged between the cover (16) and the stone mill housing (1).

4. The ultrafine stone mill according to claim 3, wherein: An air spring (17) is arranged between the cover (16) and the stone mill housing (1).

5. The ultrafine stone mill according to claim 3, wherein: A protection switch (18) capable of abutting against the cover (16) is arranged on the stone mill housing (1).

6. The ultrafine stone mill according to claim 3, wherein: The fastener includes a shaft column (19) rotatably connected to the housing (1) of the stone mill, a knurled screw knob (20) is threadedly connected to the shaft column (19), and a U-shaped notch (1601) capable of embedding the knurled screw knob (20) is provided on the cover (16), and the knurled screw knob (20) can press down on the cover (16).

7. The ultrafine stone mill according to claim 1, wherein: One end of the shaft body (701) extends between the upper grinding disc (4) and the lower grinding disc (5), and a bulk material nut (21) is threadedly connected to the end of the shaft body (701) extending between the upper grinding disc (4) and the lower grinding disc (5), and a plurality of groups of blades (2101) are provided on the outer periphery of the bulk material nut (21).

8. The ultrafine stone mill according to claim 1, characterized in that: The discharge port (3) is arranged on the outer periphery of the bottom of the grinding cavity, and a plurality of groups of material deflecting plates (22) are provided at the bottom of the seat body (702).

9. The ultrafine stone mill according to claim 1, characterized in that: Flange connection parts are provided at the ends of the feed port (2) and the discharge port (3).

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