Dual chamber water cooled colloid mill

Abstract

The utility model discloses a kind of double-cavity water-cooled colloidal mill applied to grinding field, including outer fixed body, transfer body and inner fixed body.The upper cover of outer fixed body, outer cylinder, stator and bottom plate form outer cooling cavity, inlet and outlet water port are respectively arranged in the lower part and upper part of outer cooling cavity;The central hole of bottom plate is installed transfer body and inner fixed body.Transfer body includes fixedly connected ring and rotor, ring is rotated by driving device, and rotor and stator form grinding cavity between them.Inner fixed body's inner platform and profiling body, with the inner cooling cavity of cap shape formed by rotor;Inner platform is rotatably connected by rolling ball and supports ring;Profiling body is fixed on inner platform, inner outlet is arranged on top, ring pipe is arranged on bottom, and outlet on ring pipe is evenly distributed and is communicated with the bottom of inner cooling cavity.The utility model modularization structure, convenient to assemble and disassemble, inner and outer cooling structure cool rotor and stator respectively, and the cooling of colloidal mill is strengthened.

Description

Technical Field

[0001] This invention relates to the field of grinding, specifically a colloid mill for grinding into colloids, where the rotor and stator are simultaneously water-cooled. Background Technology

[0002] As a grinding machine, colloid mills have become an indispensable grinding and pulverizing equipment in many industries such as food, chemical, and pharmaceutical due to their high grinding and emulsification capabilities, large throughput, narrow particle size distribution, compact structure, simple operation, environmental protection and energy saving, multi-functional applications, and customized production.

[0003] Regarding rotating body cooling, CN204681184U discloses a rotor water-cooling structure. This structure achieves cooling at the rotor core by introducing cold water into the hollow rotor shaft and allowing hot water to flow out. The cooling water directly cools the shaft, not the rotor itself; heat transfer from the rotor to the shaft is required. CN220382886U discloses a cooling device for a permanent magnet electric drum. The drum contains a stator and a rotor, which are fixedly connected to the rotor via a main hollow shaft. The rotor contains a cooling chamber with a rotary joint installed in the inlet pipe. The outlet of the cooling chamber connects to a cooling pipe within the drum, and the outlet pipe connects to a return pipe via an auxiliary hollow shaft. This achieves cooling of the rotor, stator, and drum. However, this cooling method involves numerous water flow bends and a large pressure drop, requiring high water pressure and demanding high-quality rotary joints. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a dual-cavity water-cooled colloid mill, which adopts two water-cooling structures, one inside and one outside, to cool the rotor and the other outside. The rotor and the other outside are installed separately and are easy to replace.

[0005] The technical solution adopted in this utility model is as follows: This utility model's dual-cavity water-cooled colloid mill includes a modularly installed outer fixed body, a rotating body, and an inner fixed body. The outer fixed body includes a fixedly connected upper cover, outer cylinder, stator, and base plate, which together form a closed annular outer cooling cavity; an external water inlet pipe is provided at the lower part of the outer cooling cavity, and an external water outlet pipe is provided at the upper part; the rotating body and the inner fixed body are installed in the central hole of the base plate. The rotating body includes a rotating ring and a rotor mounted on the rotating ring. The rotating ring is driven to rotate by a drive device and can be connected to the drive device by gear transmission or belt transmission. The drive device drives the rotating ring and the rotor to rotate; a grinding cavity is formed between the rotor and the stator to grind malt materials. The inner fixed body includes an inner platform, a contoured body, and an annular tube; the inner platform is rotatably connected to and supports the rotating ring via ball bearings; the outer surface of the contoured body corresponds to the inner surface of the rotor, the contoured body is fixed on the inner platform, the annular tube is provided at the bottom, and the inner water outlet is provided at the top; a cap-shaped inner cooling cavity is formed between the contoured body, the rotor, the rotating ring, and / or the inner platform; the water outlet of the annular tube communicates with the bottom of the inner cooling cavity and is evenly distributed around the circumference.

[0006] In one embodiment, the rotating ring and the base plate are slidably sealed, as are the rotating ring and the inner platform, and the bottom of the grinding chamber is connected to a colloid outlet pipe.

[0007] In another embodiment, a receiving groove is provided below the gap between the rotating ring and the base plate, and an annular baffle is provided on the outer side of the gap on the bottom surface of the base plate; a sliding seal is provided only between the rotating ring and the inner platform.

[0008] Furthermore, the water flow direction at the inlet of the inner cooling chamber is consistent with the water flow direction inside the inner cooling chamber, reducing the working pressure of the sliding seal between the rotating ring and the inner platform.

[0009] Furthermore, raised or recessed strips are provided on the outer surface of the contoured body, and / or raised or recessed strips are provided on the inner surface of the rotor, to enhance the cooling effect of the inner cooling cavity. The raised or recessed strips are evenly distributed around the circumference and correspond to the water inlet of the inner cooling cavity. The raised or recessed strips are vertical or inclined.

[0010] Furthermore, a spiral blade is provided on the outer circumference of the stator, and the inlet of the outer water inlet pipe and the outlet of the outer water outlet pipe are respectively located below and above the spiral blade. The inlet of the outer water inlet pipe and the outlet of the outer water outlet pipe are tangentially connected to the outer cooling cavity to enhance the cooling effect of the outer cooling cavity.

[0011] The beneficial effects of this utility model are as follows: This utility model adopts a modular structure of outer fixed body, intermediate rotating body and inner fixed body, which is convenient for installation and disassembly, and provides convenience for the replacement of rotor and stator. The water cooling structure of the outer fixed body and the inner fixed body cools the stator and rotor respectively, which enhances the cooling effect of the colloid mill. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of Example 1; Figure 2 This is a schematic diagram of the main structure of Example 2; Figure 3 This is a schematic diagram of the front view of the shape-mimicking structure in Example 3; Figure 4 for Figure 3 A top-down view; In the diagram: 1-Top cover, 2-Outer cylinder, 3-Spiral blade, 4-Stator, 5-Rotor, 6-Outer water inlet pipe, 7-Bottom plate, 8-Rotating ring, 9-Inner water inlet pipe, 10-Inner water outlet pipe, 11-Inner platform, 12-Motor, 13-Gear, 14-Rolling ball, 15-Colloid outlet pipe, 16-Ring pipe, 17-Shaped body, 18-Inner water outlet, 19-Outer water outlet pipe, 20-Feeding hopper, 21-Receiving trough, 22-Baffle, 23-Raised strip. Detailed Implementation

[0013] This utility model focuses on describing the internal and external cooling structure and modular assembly of the colloid mill. Structures not described in detail, such as the transmission, sealing, positioning, and fixed support of the colloid mill, belong to the prior art. Example 1

[0014] The structure of the dual-cavity water-cooled colloid mill in this embodiment is shown in the appendix. Figure 1 The system includes an outer fixed body, a transfer body, and an inner fixed body. The outer fixed body includes an upper cover 1, an outer cylinder 2, a stator 4, and a base plate 7, with the base plate 7 mounted on a fixed support. The upper cover 1 and the base plate 7 have through holes machined in their centers. The center hole of the upper cover connects to the receiving hopper 20, and the transfer body and the inner fixed body are installed in the center hole of the base plate. The upper cover 1, the base plate 7, the outer cylinder 2, and the stator 4 are fixedly connected together to form a closed annular outer cooling chamber. An external water inlet pipe 6 is installed at the lower part of the outer cooling chamber, and an external water outlet pipe 19 is installed at the upper part. Spiral blades 3 are preferably provided on the outer circumference of the stator 4. The spiral blades 3 can increase the heat exchange and cooling area of ​​the stator, promote turbulent flow of cooling water, enhance heat exchange, and improve cooling efficiency. The inlet of the external water inlet pipe 6 is preferably located below the spiral blades 3, and the outlet of the external water outlet pipe 19 is preferably located above the spiral blades 3. To enhance the annular flow of water, the inlet and outlet are preferably tangentially connected to the outer cooling chamber.

[0015] The rotating body includes a rotor 5 and a rotating ring 8. The rotor 5 is fixedly mounted on the rotating ring 8, and a toothed ring is machined on the bottom of the rotating ring 8. The drive device includes a motor 12 and a gear 13. The toothed ring and gear 13 cooperate with each other, and under the drive of the motor 12, the rotating ring 8 and rotor 5 are driven to rotate at high speed through gear transmission. The drive device is mounted on a fixed support. A grinding chamber is formed between the rotor 5 and the stator 4. The bottom of the grinding chamber is connected to a colloid outlet pipe 15. During grinding, malt material is added from the feeding hopper, ground in the grinding chamber, and then flows out from the colloid outlet pipe 15. The rotating ring 8 is installed in the center hole of the base plate 7 and slides and seals with the base plate 7.

[0016] The internal fixed body includes an inner platform 11, a contoured body 17, and an annular tube 16. The inner platform 11 is rotatably connected to and supports the rotating ring 8 via a ball bearing 14. Above the ball bearing, the inner platform 11 and the rotating ring 8 are slidably sealed. The contoured body 17 is fixedly connected to the inner platform 11. The outer surface of the contoured body 17 corresponds to the inner surface of the rotor 5. A cap-shaped internal cooling cavity is formed between the contoured body 17, the rotor 5, the rotating ring 8, and / or the inner platform 11. An annular tube 16 is provided at the bottom of the contoured body 17. The inlet of the annular tube 16 is connected to the inner inlet pipe 9, and the outlets are evenly distributed around the circumference, connecting to the bottom of the internal cooling cavity. An internal outlet 18 is provided at the top of the contoured body 17, and this internal outlet 18 is connected to the inner outlet pipe 10.

[0017] In this embodiment, both the outer and inner fixed bodies are mounted on a fixed support. The motor drives the rotor to rotate via gear transmission. The malt material is ground in the grinding chamber and then flows out through the colloid outlet pipe 15. The cooling water for the outer fixed body enters the outer cooling chamber through the outer inlet pipe 6, flows spirally along the spiral blades 3, cools the stator through heat exchange, and then flows out through the outer outlet pipe 19. Simultaneously, the cooling water for the inner fixed body enters the inner cooling chamber through the inner inlet pipe 9 and the ring pipe 16, cools the rotor through heat exchange, and then flows out through the inner outlet pipe 10 through the inner outlet 18.

[0018] The lower part of the rotating ring 8 may not be machined with a toothed ring. It can be connected to the drive device by a belt. The motor is installed in another position on the fixed support, avoiding the lower part of the inner platform 11. This facilitates the arrangement of the inner water inlet pipe 9 and the inner water outlet pipe 10.

[0019] In this embodiment, when inspecting the wear condition of the stator and rotor, the outer fixing body can be removed from the fixed support, making the rotor and stator visible. If replacement is needed, the rotor and stator can be disassembled and replaced. This essentially achieves modular disassembly and replacement, making it convenient and quick. Example 2

[0020] In Example 1, the ground colloid flows out of the grinding chamber through the colloid outlet pipe 15. Sliding seals are required between the rotating ring 8 and the base plate 7, and between the rotating ring 8 and the inner platform 11. In particular, the water inlet of the ring pipe 16 is almost perpendicular to the inner cooling chamber, requiring the cooling water to be converted from kinetic energy to high-pressure potential energy before it can flow within the inner cooling chamber. The sliding seal between the rotating ring 8 and the inner platform 11 operates under high-pressure sealing conditions, making it prone to leakage. This embodiment optimizes the two sliding seals in Example 1, and the structure is shown in the attached figure. Figure 2 As shown. 1) The colloid outlet pipe 15 and the sliding seal between the rotating ring 8 and the base plate 7 are removed from the embodiment. The ground colloid flows down from the gap between the rotating ring 8 and the base plate 7. A receiving groove 21 is provided below the gap. An annular baffle 22 is provided on the outer side of the gap on the bottom surface of the base plate 7. The colloid flows down from the gap and is thrown outward under the centrifugal force of the rotating ring. After being blocked by the baffle 22, it falls into the receiving groove 21, is collected, and then flows out. This structure eliminates the sliding seal between the rotating ring 8 and the base plate 7. 2) The water inlet of the inner cooling chamber is set to be parallel to the inner cooling chamber, that is, the water flow direction of the water inlet is consistent with the water flow direction of the inner cooling chamber. The cooling water in the ring pipe 16 is pressurized and flows upward from the inner platform. A slight negative pressure or slight positive pressure is formed at the sliding seal between the rotating ring 8 and the inner platform 11. Compared with embodiment 1, the sealing working pressure of the sliding seal is greatly reduced, eliminating the leakage of cooling water at this point. Example 3

[0021] This embodiment is an improvement on the internal cooling structure in Embodiment 1, as shown in the attached figure. Figure 3 and attached Figure 4 As shown, multiple raised strips 23 are provided on the outer surface of the contoured body 17. The raised strips 23 are evenly distributed around the circumference and correspond to the water inlet of the inner cooling cavity. Alternatively, the raised strips 23 can be replaced with grooved strips; similar raised or grooved strips are preferably provided on the inner surface of the rotor 5. These raised or grooved strips are only intended to reduce laminar flow, increase turbulence of the cooling water, and improve heat exchange efficiency. The raised or grooved strips on the inner surface of the rotor also increase the heat exchange area. The raised or grooved strips can be vertical or inclined at a small angle; inclined raised or grooved strips provide better water turbulence.

[0022] It is easier to machine raised or grooved strips on the outer surface of the conformal body than on the inner surface of the rotor, but the raised or grooved strips on the inner surface of the rotor have a better cooling effect.

[0023] To reduce the flow resistance of cooling water in the internal cooling chamber, the cross-sectional area of ​​the internal outlet 18 in the above embodiment is not less than four times the cross-sectional area of ​​the internal cooling chamber inlet.

[0024] This invention adopts a modular structure consisting of an outer fixed body, a central rotating body, and an inner fixed body, which facilitates easy installation and disassembly, making it convenient for replacing the rotor and stator. The water-cooling structure of the outer fixed body cools the stator, and the water-cooling structure of the inner fixed body cools the rotor. Even without the use of cryogenic coolant, the grinding chamber temperature can be reduced to below 60°C.

Claims

1. A dual-cavity water-cooled colloid mill, characterized in that: Including external fixators, transfer devices, and internal fixators; The external fixing body includes a fixedly connected upper cover (1), outer cylinder (2), stator (4) and base plate (7) to form a closed annular external cooling cavity; the lower part of the external cooling cavity is provided with an external water inlet pipe (6) and the upper part is provided with an external water outlet pipe (19); the central hole of the base plate (7) is used to install a transfer body and an internal fixing body; The rotating body includes a rotor (5) and a rotating ring (8). The rotor (5) is mounted on the rotating ring (8), which is driven to rotate by a driving device. A grinding cavity is formed between the rotor (5) and the stator (4). The inner fixed body includes an inner platform (11), a contoured body (17), and an annular tube (16); the inner platform (11) is rotatably connected to and supports the rotating ring (8) via a ball bearing (14); the outer surface of the contoured body (17) corresponds to the inner surface of the rotor (5), the contoured body (17) is fixed on the inner platform (11), the annular tube (16) is provided at the bottom, and the inner outlet (18) is provided at the top; a cap-shaped inner cooling cavity is formed between the contoured body (17), the rotor (5), the rotating ring (8), and / or the inner platform (11); the outlet of the annular tube (16) is connected to the bottom of the inner cooling cavity and is evenly distributed around the circumference.

2. The dual-cavity water-cooled colloid mill according to claim 1, characterized in that: The rotating ring (8) and the base plate (7) are slidably sealed, as are the rotating ring (8) and the inner table surface (11), and the bottom of the grinding chamber is connected to the colloid outlet pipe (15).

3. The dual-cavity water-cooled colloid mill according to claim 1, characterized in that: A receiving groove (21) is provided below the gap between the rotating ring (8) and the base plate (7). An annular baffle (22) is provided on the outer side of the gap on the bottom surface of the base plate (7). The rotating ring (8) and the inner platform (11) are slidably sealed.

4. A twin cavity water cooled colloid mill according to claim 1, wherein: The water flow direction at the inlet of the internal cooling chamber is consistent with the water flow direction inside the internal cooling chamber.

5. A twin cavity water cooled colloid mill according to claim 1, wherein: The outer surface of the shape-forming body (17) is provided with raised strips or grooves, and / or the inner surface of the rotor (5) is provided with raised strips or grooves.

6. A dual-cavity water-cooled colloid mill according to claim 5, characterized in that: The raised or recessed strips are evenly distributed around the circumference and correspond to the water inlet of the inner cooling cavity.

7. A dual-cavity water-cooled colloid mill according to claim 5, characterized in that: The raised or recessed strips are vertical or inclined.

8. A dual-cavity water-cooled colloid mill according to claim 1, characterized in that: The stator (4) has a spiral blade (3) on its outer circumference. The inlet of the outer water inlet pipe (6) and the outlet of the outer water outlet pipe (19) are respectively located below and above the spiral blade (3).

9. A dual-cavity water-cooled colloid mill according to claim 8, characterized in that: The inlet of the external water inlet pipe (6) and the outlet of the external water outlet pipe (19) are tangentially connected to the external cooling cavity.

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