Vertical sanding cylinder
By using a separator in the grinding drum to generate centrifugal force to separate materials, and fixing the rotor and rods to the main shaft with bolts, the problems of screen clogging and blade breakage are solved, thus improving stability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HONGSHI INTELLIGENT EQUIPMENT CO LTD
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-12
AI Technical Summary
The screens of existing sand mills are prone to clogging, and the blades of the stirring device are prone to breakage, posing safety hazards and being difficult to maintain.
The design eliminates the need for a screen and utilizes centrifugal force generated by the separator in the mixing device to separate materials. The rotor and rods are fixed to the main shaft with bolts, avoiding welding the blades to the main shaft and increasing stability and safety.
It achieves material separation without screens, avoids clogging problems, extends equipment life, reduces maintenance costs, and improves the stability and safety of the production process.
Smart Images
Figure CN224221467U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sand grinding equipment, and in particular relates to a vertical sand grinding cylinder. Background Technology
[0002] A sand mill, also known as a bead mill, is mainly used for grinding slurries (such as inks, coatings, and chocolate). The grinding media are generally made of materials such as glass, zirconium oxide, tungsten carbide, talc ceramic, and SAZ particles. Based on their performance, they can be broadly classified into horizontal sand mills, basket sand mills, and vertical sand mills.
[0003] The grinding function in a sand mill is achieved by the grinding cylinder, which mainly consists of a stirring device and a cylinder body. To prevent grinding media such as zirconia beads from being discharged along with the workpiece, a screen is usually installed inside the grinding cylinder. However, the screen is prone to clogging, so it needs to be cleaned frequently, which causes significant inconvenience to production.
[0004] Furthermore, conventional mixing devices typically use a welded shaft and impeller. While this structure is simple, the impellers can deform and break after prolonged use, posing safety hazards and making maintenance difficult. The welded joints also tend to trap material, making them difficult to clean and potentially contaminating subsequent grinding of different materials.
[0005] Therefore, a new technical solution is urgently needed to solve the aforementioned technical problems. Utility Model Content
[0006] The purpose of this invention is to provide a vertical sand mill cylinder that can solve the problems of easy clogging of the screen in the existing sand mill cylinder and easy breakage of the impeller of the stirring device.
[0007] This utility model is implemented as follows: a vertical sand mill cylinder includes a fixed support, a stirring device, and a cylinder body. The stirring device and the cylinder body are both fixed on the fixed support. The stirring device extends into the cylinder body. The cylinder body is provided with a material inlet, a grinding media inlet, and a grinding media outlet. The stirring device includes a hollow main shaft, a disperser, and a separator. The main shaft has a discharge channel inside, and the top of the discharge channel has a material outlet. The separator is fixedly sleeved on the outer periphery of the main shaft and located at the top of the cylinder body. The interior of the separator communicates with the bottom end of the discharge channel. The disperser is fixedly sleeved on the outer periphery of the main shaft and located below the separator. The disperser includes several rotors and several rods. The rods are fixed between two upper and lower rotors by bolts, and the outer ends of the rods protrude from the outer periphery of the rotors.
[0008] Furthermore, the cylinder body includes an outer cylinder and an inner cylinder, the disperser, separator and the bottom part of the main shaft are embedded in the inner cylinder, and there is a cooling chamber between the outer cylinder and the inner cylinder for the flow of coolant; the outer cylinder is also equipped with a coolant inlet connector and a coolant outlet connector.
[0009] Furthermore, the vertical sanding cylinder also includes an upper cover sealing assembly and a lower cover sealing assembly for sealing the upper and lower ports of the cylinder body, wherein the cylinder body and the upper cover sealing assembly are separable structures, and the cylinder body and the lower cover sealing assembly are fixedly connected structures.
[0010] Furthermore, the lower cover assembly includes a feed connector connected to the feed pump, and a one-way ball valve is embedded in the internal cavity of the feed connector to control the material to enter the grinding cylinder unidirectionally from the feed connector.
[0011] Furthermore, the stirring device also includes a rotor pressure plate, which is locked to the bottom end of the main shaft to support and lock the rotor.
[0012] Furthermore, the stirring device also includes a locking nut, which is sleeved and fixed on the periphery of the main shaft and located above the rotor pressure plate. All the rotors and rods are clamped between the locking nut and the rotor pressure plate.
[0013] Furthermore, the stirring device also includes a bearing seat, an upper bearing cap, and a lower bearing cap; the bearing seat is fixed on the fixed bracket, the main shaft rotatably passes through the bearing seat, and the upper bearing cap and the lower bearing cap are respectively placed on the top and bottom ends of the bearing seat.
[0014] Furthermore, the vertical grinding cylinder also includes an electric contact pressure gauge and an electric contact temperature gauge. The electric contact pressure gauge is used to collect the pressure information inside the inner cylinder and feed it back to the host computer. The electric contact temperature gauge is used to collect the discharge temperature and feed it back to the host computer. The host computer analyzes and processes the received information and then controls the operation of the equipment.
[0015] Compared with the prior art, the advantages of this utility model are as follows:
[0016] This utility model provides a vertical sand mill cylinder equipped with a stirring device and a cylinder body. The stirring device extends into the cylinder body and includes a hollow main shaft, a disperser, and a separator. The main shaft has a discharge channel inside, with a material outlet at the top. The separator is fixedly sleeved on the outer periphery of the main shaft and located at the top of the cylinder body, with its interior connected to the bottom of the discharge channel. A rotor is fixedly sleeved on the outer periphery of the main shaft and located below the separator. The disperser includes several rotors and several rods, which are fixed between upper and lower rotors by bolts, with the outer ends of the rods protruding from the outer periphery of the rotors. Through this design, when the main shaft rotates, it generates centrifugal force in the separator. Under the action of centrifugal force, the grinding media accumulates on the outer periphery of the separator, while the material accumulates in the central area of the separator and is discharged outwards. This design achieves separation without a screen, eliminating the problem of screen clogging. Meanwhile, the rotor and rods of the disperser are fastened to the periphery of the main shaft by sleeves and bolts, respectively, instead of being welded to the main shaft by blades. During rotation, the rotor and rods will not break from the main shaft, resulting in a long service life, low maintenance costs, and good stability and safety during production. Attached Figure Description
[0017] Figure 1 This is a cross-sectional schematic diagram of the vertical sand mill cylinder provided in the embodiments of this application;
[0018] Figure 2 This is a cross-sectional schematic diagram of another section of the vertical sand mill cylinder provided in the embodiments of this application.
[0019] Marked in the image:
[0020] Fixed bracket 1, material inlet 21, grinding media inlet 22, outer cylinder 23, inner cylinder 24, cooling chamber 25, coolant inlet connector 26, coolant outlet connector 27, main shaft 31, discharge channel 311, material outlet 312, disperser 32, rotor 321, rod nail 322, separator 33, upper cover sealing assembly 41, lower cover sealing assembly 42, one-way ball valve 43, rotor pressure plate 51, locking nut 52, bearing seat 61, upper bearing cover 62, lower bearing cover 63. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0023] Please see Figure 1 and Figure 2 This embodiment shows a vertical grinding cylinder, including a fixed support 1, a stirring device and a cylinder body. The stirring device and the cylinder body are both fixed on the fixed support 1. The stirring device extends into the cylinder body. The cylinder body is provided with a material inlet 21, a grinding media inlet 22 and a grinding media outlet.
[0024] The mixing device includes a hollow main shaft 31, a disperser 32, and a separator 33. The main shaft 31 has a discharge channel 311 inside, and a material outlet 312 is provided at the top of the discharge channel 311. The separator 33 is fixedly sleeved on the outer periphery of the main shaft 31 and located at the top of the cylinder. The interior of the separator 33 is connected to the bottom end of the discharge channel 311. The disperser 32 is fixedly sleeved on the outer periphery of the main shaft 31 and located below the separator 33. The disperser 32 includes several rotors 321 and several rods 322. The rods 322 are fixed between the upper and lower rotors 321 by bolts, and the outer ends of the rods 322 protrude from the outer periphery of the rotors 321.
[0025] Specifically, the cylinder includes an outer cylinder 23 and an inner cylinder 24. The diffuser 32, the separator 33, and the bottom part of the main shaft 31 are embedded in the inner cylinder 24. There is a cooling chamber 25 between the outer cylinder 23 and the inner cylinder 24 for supplying coolant flow. The outer cylinder 23 is also equipped with a coolant inlet connector 26 and a coolant outlet connector 27. The coolant outlet connector 27 is positioned higher than the coolant inlet connector 26. Coolant is filled into the coolant inlet connector 26, and the coolant flows in the cooling chamber 25 to dissipate heat to the inner cylinder. Then, it flows out of the cylinder through the coolant outlet connector 27.
[0026] Furthermore, the vertical grinding cylinder of this embodiment also includes an upper cover sealing assembly 41 and a lower cover sealing assembly 42 for sealing the upper and lower ports of the cylinder body, respectively. The cylinder body and the upper cover sealing assembly 41 are separable, while the cylinder body and the lower cover sealing assembly 42 are fixedly connected. Optionally, the grinding media inlet can be located in the upper cover sealing assembly 41, the material inlet 21 can be located in the lower cover sealing assembly 42, and either the upper or lower port of the cylinder body can serve as the grinding media outlet.
[0027] When the material inlet 21 is located in the lower cover sealing assembly 42, the lower cover sealing assembly 42 includes a feed connector, which is connected to a feed pump. A one-way ball valve 43 is embedded in the internal cavity of the feed connector, thereby controlling the material to enter the inner cylinder 24 unidirectionally from the feed connector.
[0028] To enhance the stability of the rotor 321 and the rod 322, the stirring device in this embodiment also includes a rotor pressure plate 51 and a locking nut 52. The rotor pressure plate 51 is locked at the bottom of the main shaft 31 to support and lock the rotor 331. The locking nut 52 is sleeved and fixed on the periphery of the main shaft 31 and located above the rotor pressure plate 51. All rotors 321 and rods 322 are sandwiched between the locking nut and the rotor pressure plate.
[0029] Furthermore, the stirring device in this embodiment also includes a bearing seat 61, an upper bearing cap 62, and a lower bearing cap 63. The bearing seat 61 is fixed on the fixed bracket 1, and the main shaft 31 rotatably passes through the bearing seat 61. The upper bearing cap 62 and the lower bearing cap 63 are respectively placed on the top and bottom ends of the bearing seat 61. Through the above structural design, a stable support structure can be provided for the main shaft 31, while also serving to lubricate, reduce friction, and ensure rotational accuracy.
[0030] Furthermore, the vertical grinding cylinder in this embodiment is also equipped with a PLC controller, an electric contact pressure gauge, and an electric contact temperature gauge. The machine operates fully automatically and can be remotely monitored and data uploaded. The electric contact pressure gauge is used to collect the pressure information inside the inner cylinder and feed it back to the PLC controller. The electric contact temperature gauge is used to collect the discharge temperature and feed it back to the PLC controller. The PLC controller analyzes and processes the received information and then controls the operation of the equipment. Specifically, the pressure inside the cylinder is generally below 0.1 MPa during normal operation. However, if the material viscosity is too high, the pumping rate is too large, or the material has not undergone sufficient pre-wetting and dispersion treatment, the pressure will rise. To ensure safe operation of the equipment, the upper limit pressure is adjusted to 0.25 MPa. When the pressure inside the cylinder exceeds this value, the machine automatically stops. The electric contact temperature gauge is installed at the discharge port to monitor the discharge temperature. The maximum temperature is generally set at 60 degrees Celsius at the factory, but can be adjusted according to user requirements.
[0031] In summary, the main shaft 31 of this embodiment rotates under external power, generating centrifugal force in the separator 33. Under this centrifugal force, the grinding media accumulates on the outer periphery of the separator, while the material accumulates in the central area of the separator 33 and is discharged outwards. This design achieves separation without a screen, eliminating the problem of screen clogging. Furthermore, the separator 33 is designed at the top of the inside of the grinding cylinder, so there is very little grinding media around it, preventing clogging and ensuring the stability of the machine during long-term operation, especially when grinding materials with expansive properties. High speed and variable frequency speed control also ensure that no balls are leaked.
[0032] Meanwhile, the rotor 321 and the rod 322 of the disperser 32 are fastened to the periphery of the main shaft 31 by sleeve and bolt respectively, instead of using the method of welding the blade to the main shaft. During the rotation of the rotor 321 and the rod 322, there will be no problem of breakage from the main shaft. The machine has a long service life, low maintenance cost, and good stability and safety in the production process.
[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A vertical sanding cylinder, characterized in that, The device includes a fixed support, a stirring device, and a cylinder. Both the stirring device and the cylinder are fixed to the fixed support. The stirring device extends into the cylinder. The cylinder has a material inlet, a grinding media inlet, and a grinding media outlet. The stirring device includes a hollow main shaft, a disperser, and a separator. The main shaft has a discharge channel inside, with a material outlet at the top. The separator is fixedly sleeved on the outer periphery of the main shaft and located at the top of the cylinder. The interior of the separator communicates with the bottom end of the discharge channel. The disperser is fixedly sleeved on the outer periphery of the main shaft and located below the separator. The disperser includes several rotors and several rods. The rods are fixed between two rotors by bolts, and the outer ends of the rods protrude from the outer periphery of the rotors.
2. The vertical grinding cylinder according to claim 1, characterized in that, The cylinder includes an outer cylinder and an inner cylinder. The disperser, separator, and the bottom part of the main shaft are embedded in the inner cylinder. There is a cooling chamber between the outer cylinder and the inner cylinder for the flow of coolant. The outer cylinder is also equipped with a coolant inlet connector and a coolant outlet connector.
3. The vertical grinding cylinder according to claim 1, characterized in that, It also includes an upper cover sealing assembly and a lower cover sealing assembly for sealing the upper and lower ports of the cylinder, respectively, wherein the cylinder and the upper cover sealing assembly are separable structures, and the cylinder and the lower cover sealing assembly are fixedly connected structures.
4. The vertical grinding cylinder according to claim 3, characterized in that, The lower cover assembly includes a feed connector, which is connected to a feed pump. A one-way ball valve is embedded in the internal cavity of the feed connector, thereby controlling the material to enter the grinding cylinder unidirectionally from the feed connector.
5. The vertical grinding cylinder according to claim 1, characterized in that, The stirring device also includes a rotor pressure plate, which is locked at the bottom end of the main shaft to support and lock the rotor.
6. The vertical grinding cylinder according to claim 5, characterized in that, The stirring device also includes a locking nut, which is sleeved and fixed on the periphery of the main shaft and located above the rotor pressure plate. All the rotors and rods are clamped between the locking nut and the rotor pressure plate.
7. The vertical grinding cylinder according to claim 1, characterized in that, The stirring device also includes a bearing seat, an upper bearing cap, and a lower bearing cap; the bearing seat is fixed on the fixed bracket, the main shaft rotates through the bearing seat, and the upper bearing cap and the lower bearing cap cover the top and bottom of the bearing seat, respectively.
8. The vertical grinding cylinder according to claim 2, characterized in that, It also includes an electric contact pressure gauge and an electric contact temperature gauge. The electric contact pressure gauge is used to collect the pressure information inside the inner cylinder and feed it back to the host computer. The electric contact temperature gauge is used to collect the discharge temperature and feed it back to the host computer. The host computer analyzes and processes the received information and then controls the operation of the equipment.