Rotary filtering device and horizontal sand mill

Abstract

The utility model relates to a rotary type filtering device and a horizontal type sand mill, which comprise a driving motor and a bearing installation seat, the driving motor is installed at the top of a motor installation plate, the bearing installation seat is installed at the bottom of the motor installation plate, the bearing installation seat is connected with a material conveying hollow shaft, and a belt pulley assembly is installed between the driving motor and the bearing installation seat. The belt pulley assembly is connected with the output end of the driving motor and the shaft end of the material conveying hollow shaft, the belt pulley assembly drives the material conveying hollow shaft to rotate, the material conveying hollow shaft is arranged in the filter base in a penetrating mode, the feeding end of the material conveying hollow shaft is connected with a filter screen, and the filter screen is arranged in the spiral filter. The spiral filter is mounted on the filter base; a filter gland is mounted at the end part of the spiral filter; the utility model solves the problems that the traditional screen mesh system cannot separate micron-sized materials, the materials of the screen mesh are blocked, deformed and abraded, and the rotary separating and filtering system leaks larger solid particles in the operation and shutdown processes.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a rotary filtering device and a horizontal sand mill for screening, separating and filtering materials. Background Art

[0002] Horizontal sand mills are widely used in coatings, inks, chemicals, pharmaceuticals, food, and electronic materials due to their high grinding and dispersion capabilities. Currently, the operation of mainstream horizontal sand mills can be divided into two major systems: (1) Grinding system: The material enters the grinding chamber through the feed port. As the internal rotor rotates, the grinding media shears and impacts the material, thereby grinding and dispersing the material. (2) Discharge system: The ground material is discharged through the discharge port, usually equipped with a grading device to control the size and distribution of the particles.

[0003] This design enables horizontal sand mills to achieve efficient and uniform grinding results in a relatively short period of time. With the development of the industry, more and more fields have higher requirements for material particle size, and the separation and screening systems involved are also constantly upgrading. Current separation and filtration systems are mainly divided into the following categories: 1. Mechanical filtration systems; 2. Membrane filtration systems; 3. Centrifugal filtration systems; and 4. Chemical filtration systems. These filtration systems are used in different scenarios. Separation systems suitable for traditional chemical or food and pharmaceutical industries are mainly divided into mechanical filtration systems and centrifugal filtration systems. Mechanical filtration systems can be simply understood as the separation and screening of materials through a suitable mesh filter. The mesh size of the filter is primarily used to select particles of different sizes. Traditional mechanical screen separation systems are currently used in mainstream sand mills due to their wide applicability, low cost, and simple operation. However, the particle size requirements of different industries vary. Screen separation systems are no longer able to meet the requirements for screening and separating micron-level materials. Furthermore, the screen cleaning is complex, which can affect production efficiency. This can also cause the screen to become clogged and deformed, shortening its service life.

[0004] The centrifugal separation and filtration system uses the centrifugal force during the rotation process to separate the solid particles (such as grinding media and product particles) in the slurry from the liquid. Through high-speed rotation, the solid particles with higher density are forced to move outward and deposit on the wall of the separator to form a sedimentation layer. Its advantages are: (1) it can quickly remove the grinding media to ensure the purity of the slurry; (2) after effectively removing the solid particles, it reduces the viscosity of the slurry and improves the fluidity; (3) it can be combined with other filtration systems to provide a stable workflow and reduce downtime. Therefore, this centrifugal separation system is widely used in the coating, ink, cosmetics, food, pharmaceutical and other industries, especially for products with higher fineness requirements. However, in the actual production process, it is found that when the solid content in the material is too high, the larger solid particles will always be squeezed into the material barrel under greater pressure during the operation of the equipment, causing slurry contamination. In addition, during the shutdown process of the equipment, the speed of the rotating separation device gradually decreases, causing larger solid particles to flow into the slurry barrel and contaminate the finished slurry, resulting in less than ideal separation effect.

[0005] Based on the above reasons, if a new type of screening and separation device can be provided, it will have very important practical significance and application value. At the same time, it is also necessary to consider the convenience of disassembly and maintenance, and ensure the simplicity and efficiency of the structure while ensuring the screening requirements. Summary of the Invention

[0006] The purpose of this utility model is to solve the above-mentioned deficiencies and provide a rotary filtering device, which solves the problems of the traditional screen system being unable to separate micron-sized materials and the clogging, deformation and wear of the screen materials, and at the same time solves the problem of the rotary separation and filtration system leaking larger solid particles during operation and shutdown, thereby reducing the failure rate of the machine during operation and meeting customers' full production efficiency.

[0007] In order to achieve the above-mentioned purpose, a rotary filtering device is designed, comprising a spiral filter 1, a filter gland 2, a filter base 3, a material transmission hollow shaft 5, a drive motor 6, a pulley assembly 7, a bearing mounting seat 10, a motor mounting plate 12 and a filter screen 13, wherein the drive motor 6 is mounted on the top of the motor mounting plate 12, the bearing mounting seat 10 is mounted on the bottom of the motor mounting plate 12, the bearing mounting seat 10 is connected to the material transmission hollow shaft 5, a pulley assembly 7 is installed between the drive motor 6 and the bearing mounting seat 10, the pulley assembly 7 is respectively connected to the output end of the drive motor 6 and the shaft end of the material transmission hollow shaft 5, the pulley assembly 7 drives the material transmission hollow shaft 5 to rotate under the drive of the drive motor 6, the material transmission hollow shaft 5 is penetrated in the filter base 3, the feed end of the material transmission hollow shaft 5 is connected with a filter screen 13, the filter screen 13 is arranged in the spiral filter 1, the spiral filter 1 is mounted on the filter base 3, and the end of the spiral filter 1 is mounted with a filter gland 2.

[0008] Furthermore, the end of the material transmission hollow shaft 5 is provided with a thread, and is axially installed through the thread at the end and the threaded transition connection block 9.

[0009] Furthermore, the end of the threaded transition connection block 9 is provided with a step, and the step is engaged with the corresponding end of the material transfer hollow shaft 5 to determine the installation depth.

[0010] Furthermore, the material transmission hollow shaft 5 is connected to the bearing mounting seat 10 and fixed via a round nut 11 , and the filter base 3 is mounted on the end face of the round nut 11 , so that the two do not need to be positioned at an angle.

[0011] Furthermore, the filter screen 13 is connected and positioned with the material transmission hollow shaft 5 via a positioning pin 4 , and the filter base 3 and the spiral filter 1 are axially mounted and then angularly mounted via the positioning pin 4 .

[0012] Furthermore, the bearing mounting seat 10 is connected to the motor mounting plate 12 by bolts. The motor mounting plate 12 is provided with vertically arranged strip holes. The driving motor 6 adjusts the height through the strip holes and thus adjusts the tension of the pulley assembly 7.

[0013] Furthermore, the spiral filter 1 and the filter gland 2 are axially positioned by concentric circles at the center of the circle, and the filter gland 2 and the threaded transition connection block 9 are installed in combination with the mounting screws 8 .

[0014] Furthermore, the spiral filter 1 is assembled by a right spiral filter 1-A and a left spiral filter 1-B. A spiral channel is provided on the spiral filter 1, and the spiral channel is connected to the through hole at the center thereof.

[0015] The present invention also provides a horizontal sand mill, comprising the rotary filtering device 23 as described above, and also comprising an overall equipment frame 20, an equipment grinding system 21, a material feeding system 22 and a material discharging system 24. The equipment grinding system 21, the material feeding system 22, the rotary filtering device 23 and the material discharging system 24 are all installed on the overall equipment frame 20. The equipment grinding system 21 is connected to the material feed port through a pipeline, the discharge end of the equipment grinding system 21 is connected to the feed end of the rotary filtering device 23, and the discharge end of the rotary filtering device 23 is connected to the material discharging system 24. After passing through the material transmission hollow shaft 5 of the rotary filtering device 23, the material is discharged from the material discharging system 24 and collected in the material barrel.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] (1) Compared with the traditional mesh filter, the utility model not only improves the filtration fineness of the material, but also reduces the time for later maintenance and replacement of the filter, thereby improving work efficiency. In addition, the phenomenon of "material blocking the mesh port" that is unique to the traditional mesh filter will not occur;

[0018] (2) When the filter particle size of the material needs to be changed, the traditional mesh filter needs to be disassembled and replaced with a filter of different fineness. However, the rotary filter device provided by the utility model only needs to adjust the driving speed to the appropriate parameter to achieve seamless replacement of the "filter", which reduces the replacement time and improves work efficiency.

[0019] (3) Compared with the traditional centrifugal filtration separation system, the utility model solves the problem of leakage of large solid particles during operation and shutdown due to the appearance of the internal filter screen. The screen does not need to directly contact the external high-speed rotating solid particles and is only used for filtering. Therefore, the replacement cycle is longer and it is easy to disassemble and assemble, which is more convenient for regular replacement.

[0020] (4) The utility model rotary filter device can greatly meet the needs of specific customers who have requirements for the particle fineness and production capacity of production materials;

[0021] (5) The utility model solves a series of problems such as the inability of traditional screen systems to separate micron-sized materials and the clogging, deformation and wear of materials on the screen. It also solves the problem of leakage of large solid particles in the rotary separation and filtration system during operation and shutdown, thereby reducing the failure rate of the machine during operation and meeting customers' full production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of an applicable model of the utility model;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 3 It is an exploded view of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the spiral filter of the utility model;

[0026] Figure 5 This is a schematic structural diagram of the right side of the spiral filter of the utility model;

[0027] Figure 6 yes Figure 5 Middle AA section view;

[0028] Figure 7 This is a schematic diagram of the internal structure of the hollow shaft for material transmission of the utility model;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the hollow shaft for material transmission of the utility model;

[0030] Figure 9 It is a schematic diagram of the cross-sectional structure of the rotary separation device of the utility model;

[0031] In the figure: 1. Spiral filter; 2. Filter gland; 3. Filter base; 4. Locating pin; 5. Hollow shaft for material transmission; 6. Drive motor; 7. Pulley assembly; 8. Mounting screws; 9. Threaded transition connection block; 10. Bearing mounting seat; 11. Round nut; 12. Motor mounting plate; 13. Filter screen; 1-A, right spiral filter; 1-B, left spiral filter; 20. Overall equipment frame; 21. Equipment grinding system; 22. Material feeding system; 23. Rotary filter device; 24. Material discharging system. DETAILED DESCRIPTION

[0032] The present invention is further described below with reference to the accompanying drawings:

[0033] As attached Figure 2 To the attached Figure 9 As shown, the utility model provides a rotary filtering device, specifically a rotary material particle filtering and screening device, which mainly includes a spiral filter 1, a filter gland 2, a filter base 3, a positioning pin 4, a material transmission hollow shaft 5, a drive motor 6, a pulley assembly 7, a mounting screw 8, a threaded transition connection block 9, a bearing mounting seat 10, a round nut 11, a motor mounting plate 12 and a filter screen 13, the drive motor 6 is mounted on the top of the motor mounting plate 12, the bearing mounting seat 10 is mounted on the bottom of the motor mounting plate 12, and the bearing mounting seat 10 is connected to the material transmission hole 13. The material transmission hollow shaft 5 is connected, and a pulley assembly 7 is installed between the drive motor 6 and the bearing mounting seat 10. The pulley assembly 7 is respectively connected to the output end of the drive motor 6 and the shaft end of the material transmission hollow shaft 5. The pulley assembly 7 drives the material transmission hollow shaft 5 to rotate under the drive of the drive motor 6. The material transmission hollow shaft 5 is penetrated by the filter base 3. The feed end of the material transmission hollow shaft 5 is connected with a filter screen 13. The filter screen 13 is arranged in the spiral filter 1. The spiral filter 1 is installed on the filter base 3. The filter gland 2 is installed at the end of the spiral filter 1.

[0034] The material transfer hollow shaft 5 is threaded at its end, and these threads are used to axially mount to the threaded transition block 9. The threaded transition block 9 also has a step at its end, which engages with the corresponding end of the material transfer hollow shaft 5 to determine the installation depth. The material transfer hollow shaft 5 is connected to the bearing mount 10 and secured with a round nut 11. The filter base 3 is mounted on the end face of the round nut 11, eliminating the need for angular positioning between the two. The filter screen 13 is connected and positioned to the material transfer hollow shaft 5 via a locating pin 4. After axial installation, the filter base 3 is then angularly mounted using the locating pin 4 to the spiral filter 1.

[0035] The spiral filter 1 and filter gland 2 are axially positioned using concentric circles at their center. The filter gland 2 and threaded transition piece 9 are installed using mounting screws 8. The spiral filter 1 is assembled from the right spiral filter 1-A and the left spiral filter 1-B. A spiral channel is provided on the spiral filter 1, connecting to a through-hole at its center. The bearing mount 10 is bolted to the motor mounting plate 12, which features vertically arranged slots. These slots allow the drive motor 6 to adjust its height, and thus the tension of the pulley assembly 7.

[0036] As attached Figure 1 As shown, it is a simplified schematic diagram of an integral horizontal sand mill. The rotary filtering device of the present invention is suitable for the structure of the horizontal wet sand mill type; the horizontal sand mill includes the rotary filtering device 23 as described above, and also includes an overall equipment frame 20, an equipment grinding system 21, a material feeding system 22 and a material discharging system 24. The equipment grinding system 21, the material feeding system 22, the rotary filtering device 23, and the material discharging system 24 are all installed on the overall equipment frame 20. The equipment grinding system 21 is connected to the material from the feed port through a pipeline, and the discharge end of the equipment grinding system 21 is connected to the feed end of the rotary filtering device 23, and the discharge end of the rotary filtering device 23 is connected to the material discharging system 24. The material passes through the material transmission hollow shaft 5 of the rotary filtering device 23 and is discharged from the material discharging system 24 and collected in the material barrel.

[0037] During operation, the drive motor in the rotary filter 23 is first turned on, and the rotary separator speed is increased to the appropriate setting. The material is then introduced into the equipment's grinding system 21 through a pipe from the feed port. The grinding system's drive motor is activated, and the internal agitator shaft rotates at high speed, driving the grinding beads to crush and disperse the material. As the material particle size decreases, it is forced into the rotary filter 23 under pressure. Within the spiral separation filter, the material particles are centrifugally arranged on the inner wall of the spiral filter 1 in ascending order of mass. Larger particles are ejected from the filter, while smaller particles are forced into the central material transfer hollow shaft 5 under pressure. After passing through the material transfer hollow shaft 5, the material is discharged from the material discharge system 24 and collected in the material barrel. When the equipment is stopped, the agitator shaft drive motor must first be stopped. Once the shutdown is complete, the separation filter drive motor is then de-energized. This maximizes material fineness and prevents any grinding beads from leaking into the barrel, ensuring material purity.

[0038] The motor-driven screening and separation device described in this utility model drives the rotation of the separator by the motor. The sheared and impacted materials are brought into the separator by pressure. The materials in the separator are arranged and distributed on the separator wall according to different mass. As the separator rotates, the large-mass particles are squeezed out of the separator by the centrifugal force to form a sedimentation layer. Conversely, small-mass particles are squeezed by large-mass particles and flow through the separator. After entering the internal space of the separator, they pass through a layer of screen. This layer of screen is used to filter out larger particles and ensure that the grinding beads do not flow into the material barrel along with the material. Finally, they are discharged through the hollow shaft and reach the material barrel. Different rotation speeds will screen particles of different particle sizes. As the rotation speed increases, the screened particle size also decreases.

[0039] Specifically, the material transmission hollow shaft 5 and the threaded transition connection block 9 are axially installed through the threads at the end. The end step of the threaded transition connection block 9 is engaged with the corresponding end of the material transmission hollow shaft 5 to determine the installation depth. The filter base 3 is installed on the end face of the round nut 11. The two do not need to be angularly positioned. The round nut 11 and the material transmission hollow shaft 5 jointly determine the specific position of the bearing mounting seat 10. The bearing mounting seat 10 is installed at the bottom of the motor mounting plate 12. The drive motor 6 is installed at the top of the motor mounting plate 12. The pulley assembly 7 is adjusted and installed after the spatial positions of the bearing mounting seat 10 and the drive motor 6 are determined. The filter screen 13 is connected and positioned with the material transmission hollow shaft 5 through the positioning pin 4. The filter base 3 and the spiral filter 1 are first axially installed and then angularly installed through the positioning pin 4. The spiral filter 1 and the filter cover 2 are axially positioned through concentric circles at the center of the circle. The filter cover 2 and the threaded transition connection block 9 are then installed with the mounting screws 8. At this point, the overall rotary filter device is installed. The process of disassembling and assembling the rotary filter device is the opposite of the installation process.

[0040] The installation of the rotary filtration separation device of the utility model can be mainly divided into the following steps:

[0041] S1, the material transmission hollow shaft 5 is connected to the bearing mounting seat 10, and then the two are fixed by the round nut 11;

[0042] S2, the bearing mounting seat 10 and the motor mounting plate 12 are connected with bolts;

[0043] S3, the material transfer hollow shaft 5 and the threaded transition connection block 9 are axially installed through the threads at the ends, and the end step of the threaded transition connection block 9 is engaged with the corresponding end of the material transfer hollow shaft 5 to determine the installation depth;

[0044] S4, the pulley assembly 7 is installed on the shaft end of the drive motor 6 and the material transmission hollow shaft 5, and the pulley assembly is installed and tensioned by adjusting the height of the drive motor 6 to meet the appropriate tension;

[0045] S5, the filter base 3 is installed on the end face of the round nut 11, and the two do not need to be positioned at an angle;

[0046] S6, the filter screen 13 and the material transmission hollow shaft 5 are connected and positioned through the positioning pin 4;

[0047] S7, the filter base 3 and the spiral filter 1 are first axially installed and then angularly installed using the positioning pin 4;

[0048] S8, the spiral filter 1 and the filter gland 2 are axially positioned by concentric circles at the center of the circle;

[0049] S9, install the screws 8 to connect the filter gland 2 and the threaded transition connection block 9;

[0050] The installation of the entire rotary filter unit is now complete. The disassembly and assembly process of the rotary filter unit should be carried out in the order of S9 → S8 → S7 → S6 → S5.

[0051] The present invention is relatively simple to install and remove the filter; it can be replaced simply by unscrewing the mounting screws 8. Furthermore, because its separation and filtration principles differ from those of conventional screen filtration and centrifugal filtration, it not only meets the requirements for filtering particles down to the micron level, but also ensures high durability and the purity of the finished slurry. Compared to conventional screen filters, whose basic design inevitably leads to reduced filtration efficiency due to material clogging the mesh opening, the present invention's rotary filter separator relies on the centrifugal force generated during rotation to perform graded filtration, prioritizing larger particles before passing through the filter screen to remove any large particles that have been squeezed in. This significantly reduces clogging issues and prevents the introduction of abrasive media into the slurry during operation and during shutdown, impacting the product. Furthermore, due to varying processing techniques, the material of the present invention's rotary filter can be specifically selected based on the physical and chemical properties of the material. Conventional screen filters, which cannot resolve the problem of material clogging, require regular filter screen replacement. Compared to the present invention, the replacement cycle is shorter, making it difficult to meet customer production requirements.

[0052] The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connections adopt conventional connection methods in the existing technology, which will not be described in detail here.

[0053] The present invention is not limited to the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A rotary filter device comprising a spiral filter (1), a filter gland (2), a filter base (3), a material transmission hollow shaft (5), a drive motor (6), a pulley assembly (7), a bearing mounting seat (10), a motor mounting plate (12) and a filter screen (13), characterized in that: The driving motor (6) is mounted on the top of the motor mounting plate (12), the bearing mounting seat (10) is mounted on the bottom of the motor mounting plate (12), the bearing mounting seat (10) is connected to the material transmission hollow shaft (5), a pulley assembly (7) is installed between the driving motor (6) and the bearing mounting seat (10), the pulley assembly (7) is respectively connected to the output end of the driving motor (6) and the shaft end of the material transmission hollow shaft (5), the pulley assembly (7) drives the material transmission hollow shaft (5) to rotate under the drive of the driving motor (6), the material transmission hollow shaft (5) is inserted into the filter base (3), the feed end of the material transmission hollow shaft (5) is connected to a filter screen (13), the filter screen (13) is arranged in the spiral filter (1), the spiral filter (1) is mounted on the filter base (3), and a filter gland (2) is installed at the end of the spiral filter (1).

2. The rotary filter device according to claim 1, wherein: The end of the material transmission hollow shaft (5) is provided with a thread, and is axially mounted via the thread at the end and a thread transition connection block (9).

3. The rotary filter device according to claim 2, wherein: The end of the threaded transition connection block (9) is provided with a step, and is engaged with the corresponding end of the material transmission hollow shaft (5) via the step to determine the installation depth.

4. The rotary filter device according to claim 1, wherein: The material transmission hollow shaft (5) is connected to the bearing mounting seat (10) and fixed via a round nut (11), and the filter base (3) is mounted on the end face of the round nut (11).

5. The rotary filter device according to claim 1, wherein: The filter screen (13) and the material transmission hollow shaft (5) are connected and positioned via a positioning pin (4), and the filter base (3) and the spiral filter (1) are axially mounted and then angularly mounted via the positioning pin (4).

6. The rotary filter device according to claim 1, wherein: The bearing mounting seat (10) is connected to the motor mounting plate (12) by bolts. The motor mounting plate (12) is provided with vertically arranged strip holes. The driving motor (6) is adjusted in height through the strip holes to thereby adjust the tension of the pulley assembly (7).

7. The rotary filter device according to claim 1, wherein: The spiral filter (1) and the filter gland (2) are axially positioned by concentric circles at the center of the circle, and the filter gland (2) and the threaded transition connection block (9) are installed in combination with the mounting screws (8).

8. The rotary filter device according to claim 1, wherein: The spiral filter (1) is assembled from a right spiral filter (1-A) and a left spiral filter (1-B). A spiral channel is provided on the spiral filter (1), and the spiral channel is connected to a through hole at its center.

9. A horizontal sand mill, characterized in that: The invention comprises a rotary filtering device (23) as described in any one of claims 1 to 8, and further comprises an overall equipment frame (20), an equipment grinding system (21), a material feeding system (22) and a material discharging system (24), wherein the equipment grinding system (21), the material feeding system (22), the rotary filtering device (23) and the material discharging system (24) are all installed on the overall equipment frame (20), the equipment grinding system (21) is connected to the material feed port through a pipeline, the discharge end of the equipment grinding system (21) is connected to the feed end of the rotary filtering device (23), the discharge end of the rotary filtering device (23) is connected to the material discharging system (24), and the material passes through the material transmission hollow shaft (5) of the rotary filtering device (23) and is discharged from the material discharging system (24) and collected in a material barrel.

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