A mill feed seal apparatus and method of assembly and disassembly
By using a sealing ring structure with internal filling material at the mill feed position, the problem of easy damage to the sealing ring is solved, achieving sealing reliability and self-repair function, thus ensuring stable operation and efficient production of the mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG PROVINCE DABAOSHAN MINING CO LTD
- Filing Date
- 2026-05-26
- Publication Date
- 2026-08-04
AI Technical Summary
The sealing ring at the feed position of the mill is prone to damage in high-wear environments, leading to material leakage and affecting the normal operation of the equipment.
The sealing ring structure, which is internally filled with a material, generates additional internal support force during compression, ensuring stable contact between the sealing ring and the mating surface. It also utilizes Bingham thixotropic modified colloid to achieve self-healing function, enhancing sealing reliability.
It significantly improves the sealing reliability of the mill feed position, reduces material leakage, extends the service life of the sealing ring, reduces the maintenance frequency, and ensures the continuous and stable operation of the mill through the screen cleaning structure.
Smart Images
Figure CN122499882A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mill technology, specifically to a mill feed sealing device and its assembly / disassembly method. Background Technology
[0002] Mills are core industrial equipment for grinding lumpy materials into powder, and are widely used in many fields such as mining, building materials, metallurgy, chemical industry, and animal husbandry.
[0003] During the use of the mill, there is a connection gap at the feed position. Since this connection gap is located in the material grinding operation area, it is required to have high sealing performance to prevent the ground material from leaking. However, this location is close to the grinding area, and the sealing ring is prone to damage in this working environment, which in turn affects the normal operation of the equipment. Therefore, there is a need to provide a mill feed sealing device to solve the technical problem of the sealing ring being easily damaged. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a mill feed sealing device and its assembly / disassembly method. By employing a sealing ring structure internally filled with a material, additional internal support force is generated when subjected to compression, ensuring stable contact between the sealing ring and the mating surface. This significantly improves the sealing reliability of the mill feed position and effectively prevents material leakage.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a mill feed sealing device, comprising a support platform, an output motor fixedly installed on one side of the top of the support platform, and a crusher provided on the other side of the top surface of the support platform. The crusher includes a discharge trough plate fixedly installed on one side of the top of the support platform. A power shaft is rotatably installed on both opposite sides of the surface of the discharge trough plate via a connecting shaft. A feeding trough plate is rotatably installed on one side of the top of the discharge trough plate. The feeding trough plate and the discharge trough plate are fixed together by bolts to ensure stability during use. A sealing assembly is provided between the discharge trough plate and the feeding trough plate. The sealing assembly includes two sealing rings disposed between the feed trough plate and the filling trough plate. The cross-section of each sealing ring is three vertically arranged rhombuses, wherein the size of the central rhombus is smaller than that of the two rhombuses on both sides. Furthermore, both sealing rings are hollow structures. Silicone valve cores are embedded in opposite sides of the surfaces of the two sealing rings. The inner wall of the sealing rings is attached with an enhanced interception mesh. The shaft wall of the power shaft is fixedly installed with crushing teeth, and the opposite sides of the inner wall of the feed trough are fixedly installed with combination frames. A screen is snapped between the two combination frames, and cleaning components are provided on the opposite sides of the inner wall of the feed trough. By setting up a structure to clean the grinding screen, the material attached to the screen can be removed in time, avoiding screen blockage, ensuring smooth discharge, and maintaining the continuous and stable working state of the mill. The screen cleaning structure eliminates the problem of reduced screening area caused by blockage, allowing qualified fine powder to be discharged in time, avoiding over-grinding, and improving the material grinding effect and overall production efficiency. By employing a sealing ring structure internally filled with material, additional internal support force is generated when compressed, ensuring stable contact between the sealing ring and the mating surface. This significantly improves the sealing reliability at the mill feed position and effectively prevents material leakage. By combining the self-healing capability of the sealing structure with the synergistic effect of the screen cleaning structure, downtime for maintenance caused by seal failure or screen blockage is reduced, thereby improving the mill's operating rate and economy.
[0006] Furthermore, the output end of the output motor is fixedly connected to a first pulley, and a second pulley is fixedly installed at one end of the power shaft on the same side as the first pulley, while a belt is engaged between the first pulley and the second pulley.
[0007] Furthermore, a counterweight wheel is fixedly installed on the side of the power shaft away from the second pulley, and the counterweight wheel and the second pulley are arranged symmetrically with respect to the axis of the power shaft.
[0008] Furthermore, each end of the two sealing rings is set as a semi-circular head, and the semi-circular heads of the two sealing rings can be combined to form a circular combination strip, which is used to wrap and seal the surface of the power shaft.
[0009] Furthermore, the sealing ring consists of three vertical rhombuses arranged symmetrically on the left and right sides and connected in series to form a multi-level vertical rhombus sealing lip.
[0010] Furthermore, the silicone valve core is used to prevent the material inside the sealing ring from flowing out. When adding material into the sealing ring, the material is injected from one valve core, and at the same time, a venting needle is inserted from the other valve core to vent the air, so as to ensure that the material inside the sealing ring is full. The sealing ring is filled with Bingham thixotropic modified colloid, which contains 20%-35% flake graphite powder. The material filling the sealing ring can flow outward after the sealing ring is damaged and form a repair layer at the leakage point, realizing the self-repair function of the sealing device, extending the service life of the sealing ring, and reducing the frequency of maintenance and replacement.
[0011] Furthermore, the reinforced interception mesh is made of 316L stainless steel woven wire mesh. This reinforced interception mesh can not only ensure the overall strength of the sealing ring, but also intercept the Bingham thixotropic modified colloid inside when cracks appear in the sealing ring, thereby better sealing the cracks.
[0012] Furthermore, the cleaning assembly includes a fixed groove plate fixedly installed on the inner wall of the feeding trough plate, an electric guide rail fixedly installed on the inner wall of the fixed groove plate, a connecting block fixedly installed at the output end of the electric guide rail, an arc brush plate fixedly installed on two corresponding connecting blocks, and stainless steel bristles fixedly installed on the inner wall of the arc brush plate.
[0013] Furthermore, the two cleaning components are arranged around the screen and are capable of cleaning the screen. The thickness of the arc brush plate is less than the thickness of the combination frame so that the arc brush plate can be stored in the lower side of the combination frame when not in use. A corrugated folding plate is fixedly installed on the surface of the connecting block, and the surface of the corrugated folding plate is embedded in the interior of the fixing groove plate. When the connecting block moves, the corrugated folding plate is used to protect the gap generated by the movement of the connecting block.
[0014] A method for assembling and disassembling a mill feed sealing device, the method comprising an installation step and a disassembly step: Installation steps: Step 1: Fit two sealing rings between the unloading trough plate and the feeding trough plate, so that the semi-circular ends of the two sealing rings combine to form a circular strip that wraps around the surface of the drive shaft; Step 2: Fill the sealing ring with Bingham thixotropic modified colloid through one silicone valve core, while simultaneously venting air through the other silicone valve core, until the seal is fully filled; Step 3: Secure the feeding trough plate and the unloading trough plate with bolts; Disassembly steps: Step 1: Loosen the bolts between the feeding trough plate and the unloading trough plate to separate the feeding trough plate; Step 2: Remove the sealing ring.
[0015] Compared with the prior art, the present invention provides a mill feed sealing device and a method for assembly and disassembly, which has the following beneficial effects: 1. This device employs a sealing ring structure internally filled with material, which generates additional internal support force when compressed, ensuring stable contact between the sealing ring and the mating surface. This significantly improves the sealing reliability of the mill feed position and effectively prevents material leakage.
[0016] 2. This device utilizes the material filling the sealing ring to flow outward after the sealing ring is damaged, forming a repair layer at the leakage location, thereby realizing the self-repair function of the sealing device, extending the service life of the sealing ring, and reducing the frequency of maintenance and replacement.
[0017] 3. By setting up a structure to clean the grinding screen, this device can promptly remove the material adhering to the screen, avoid screen blockage, ensure smooth discharge, and maintain the continuous and stable working state of the mill.
[0018] 4. This device utilizes a screen cleaning structure to eliminate the problem of reduced screening area caused by clogging, allowing qualified fine powder to be discharged in a timely manner, avoiding over-grinding, and improving the material grinding effect and overall production efficiency.
[0019] 5. This device, through the synergistic effect of the self-healing capability of the sealing structure and the screen cleaning structure, reduces downtime for maintenance caused by seal failure or screen blockage, thereby improving the mill's operating rate and economy. Attached Figure Description
[0020] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a perspective view of the feeding trough plate of the present invention. Figure 3 This is an exploded view of the crusher of this invention; Figure 4 This is a perspective view of the sealing ring assembly of the present invention; Figure 5 for Figure 4 A magnified structural diagram of structure A is shown below; Figure 6 This is a perspective view of the sealing ring of the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure of B shown; Figure 8 This is a perspective view of the material feeding trough plate of the present invention; Figure 9 for Figure 8 A schematic diagram of the enlarged structure of C shown; Figure 10 This is a top view of the cleaning component of the present invention; Figure 11 This is a front view of the cleaning component of the present invention; Figure 12 for Figure 11 A schematic diagram of the enlarged structure of D is shown below; Figure 13 This is a perspective view of the cleaning component of the present invention; Figure 14 for Figure 13 The enlarged structural diagram of E is shown.
[0021] In the diagram: 1. Support platform; 2. Output motor; 3. Crusher; 4. Feed chute; 5. Drive shaft; 501. Counterweight wheel; 6. Feed chute; 201. First pulley; 202. Second pulley; 203. Belt; 7. Sealing components; 701. Sealing ring; 702. Silicone valve core; 703. Reinforced interception mesh; 8. Crushing teeth; 9. Combination frame; 10. Screen; 11. Cleaning components; 1101. Fixing groove plate; 1102. Electric guide rail; 1103. Connecting block; 1104. Arc brush plate; 1105. Stainless steel bristles; 1106. Corrugated folding plate. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] Please see Figures 1 to 14 A mill feed sealing device in this embodiment includes a support platform 1, an output motor 2 is fixedly installed on one side of the top of the support platform 1, and a crusher 3 is provided on the other side of the top surface of the support platform 1. The crusher 3 includes a feeding trough plate 4 fixedly installed on one side of the top of the support platform 1. The opposite sides of the surface of the feeding trough plate 4 are rotatably mounted with a power shaft 5 through a connecting shaft. A feeding trough plate 6 is rotatably mounted on one side of the top of the feeding trough plate 4. The feeding trough plate 6 and the feeding trough plate 4 are fixed together with bolts to ensure stability during use. A sealing assembly 7 is provided between the feeding trough plate 4 and the feeding trough plate 6. The sealing assembly 7 includes two sealing rings 701 embedded between the feed trough plate 4 and the feeding trough plate 6. The cross-section of each sealing ring 701 is three vertically arranged rhombuses, wherein the size of the central rhombus is smaller than that of the two rhombuses on both sides. Both sealing rings 701 are hollow structures. Silicone valve cores 702 are embedded on opposite sides of the surface of the two sealing rings 701. The inner wall of the sealing rings 701 is attached with an enhanced interception mesh 703. The ends of the two sealing rings 701 are each set as semi-circular heads. The semi-circular heads of the two sealing rings 701 can be combined to form a circular combination strip. This circular combination strip is used to wrap and seal the surface of the power shaft 5. The three vertical rhombuses of the sealing rings 701 are arranged symmetrically on the left and right and connected in series to form a multi-level vertical rhombus sealing lip. The silicone valve core 702 is used to prevent the material filling the sealing ring 701 from flowing out. When adding material into the sealing ring 701, the material is injected from one valve core, and at the same time, the vent needle is inserted from the other valve core to vent the air, so as to ensure that the material inside the sealing ring 701 is full. The sealing ring 701 is filled with Bingham thixotropic modified colloid, which contains 20% to 35% flake graphite powder. The flake-like structure of graphite powder can fill the micropores of the colloid, improving the colloid's resistance to compression and wear, extending the service life of the sealing ring 701, and improving the sealing performance after thixotropic recovery: Bingham thixotropic modified colloid recovers high viscosity when at rest, and the addition of graphite powder can increase the structural strength of the colloid, enabling it to more stably seal the gap when the crack self-heals, preventing secondary leakage; The reinforced interception mesh 703 is made of 316L stainless steel woven wire mesh. The reinforced interception mesh 703 can not only ensure the overall strength of the sealing ring 701, but also intercept the Bingham thixotropic modified colloid inside when the sealing ring 701 cracks, thereby better sealing the cracks. A crushing tooth 8 is fixedly installed on the shaft wall of the power shaft 5. A counterweight wheel 501 is fixedly installed on the side of the power shaft 5 away from the second pulley 202. The counterweight wheel 501 and the second pulley 202 are arranged symmetrically with respect to the axis of the power shaft 5. The output end of the output motor 2 is fixedly connected to the first pulley 201, and the power shaft 5 is fixedly installed with the second pulley 202 at one end on the same side as the first pulley 201. The first pulley 201 and the second pulley 202 are connected together by a belt 203. A combination frame 9 is fixedly installed on both opposite sides of the inner wall of the feeding trough plate 4. A screen 10 is snapped between the two combination frames 9. A cleaning component 11 is provided on both opposite sides of the inner wall of the feeding trough plate 4. The cleaning component 11 includes a fixed trough plate 1101 fixedly installed on the inner wall of the feeding trough plate 4. An electric guide rail 1102 is fixedly installed on the inner wall of the fixed trough plate 1101. A connecting block 1103 is fixedly installed at the output end of the electric guide rail 1102. An arc brush plate 1104 is fixedly installed on the two corresponding connecting blocks 1103. Stainless steel bristles 1105 are fixedly installed on the inner wall of the arc brush plate 1104. Two cleaning components 11 are arranged around the screen 10 and can clean the screen 10. The thickness of the arc brush plate 1104 is less than the thickness of the combination frame 9 so that the arc brush plate 1104 can be stored in the lower side of the combination frame 9 when not in use. A corrugated folding plate 1106 is fixedly installed on the surface of the connecting block 1103. The surface of the corrugated folding plate 1106 is embedded in the interior of the fixing groove plate 1101. When the connecting block 1103 moves, the corrugated folding plate 1106 is used to protect the gap generated by the movement of the connecting block 1103.
[0024] A method for assembling and disassembling a mill feed sealing device includes installation and disassembly steps: Installation steps: Step 1: Insert two sealing rings 701 between the unloading trough plate 4 and the feeding trough plate 6, so that the semi-circular ends of the two sealing rings 701 combine to form a circular combination strip, which wraps around the surface of the power shaft 5. Step 2: Fill the sealing ring 701 with Bingham thixotropic modified colloid through one silicone valve core 702, and at the same time, insert a venting needle through another silicone valve core 702 to vent the air until the seal is fully filled. Step 3: Install the power shaft 5 on the connecting shafts on both sides of the feed trough plate 4, fix the crushing teeth 8, install the second pulley 202 on one end of the power shaft 5 and the counterweight wheel 501 on the other end, and connect the first pulley 201 of the output motor 2 through the belt 203; Step 4: Attach the screen 10 between the two combination frames 9, and arrange the two cleaning components 11 around the screen 10 so that the arc brush plate 1104 is stored under the combination frame 9. Step 5: Fix the feeding trough plate 6 and the unloading trough plate 4 with bolts.
[0025] Disassembly steps: Step 1: Loosen the bolts between the feeding trough plate 6 and the unloading trough plate 4, and separate the feeding trough plate 6; Step 2: Remove sealing ring 701; Step 3: Remove the drive shaft 5, counterweight wheel 501, and belt 203; Step 4: Remove the screen 10 and cleaning component 11.
[0026] The working principle of the above embodiments is as follows: When the device is working, the output motor 2 is started, which drives the power shaft 5 to rotate through the first pulley 201, belt 203 and second pulley 202. The counterweight wheel 501 plays a dynamic balancing role and reduces vibration. The crushing teeth 8 on the power shaft 5 crush the material that enters between the feed trough 4 and the feeding trough 6. The two sealing rings 701 in the sealing assembly 7 tightly wrap the surface of the power shaft 5 through the circular combination strip formed by the semi-circular ends of their ends. At the same time, the sealing lips composed of three vertical rhombuses form a multi-stage seal, which effectively prevents the leakage of material dust. The Bingham thixotropic modified colloid filled inside the sealing ring 701 has shear thinning properties, which reduces frictional resistance when the power shaft 5 rotates and restores high viscosity when stationary to ensure sealing. The added flake graphite powder plays a role in lubrication and anti-wear. When the sealing ring 701 has a small crack, the internal colloid automatically seeps out under pressure and seals the crack. At the same time, the reinforced interception net 703 prevents the colloid from being lost in large quantities and improves the overall strength of the sealing ring 701. The silicone valve core 702 ensures that the filling and venting process is smooth and prevents the colloid from flowing out. The crushed material falls onto the screen 10. Qualified particles are discharged through the screen 10, while unqualified particles are intercepted. When the cleaning component 11 is working, the electric guide rail 1102 drives the connecting block 1103 to move, which in turn drives the arc brush plate 1104 and its stainless steel bristles 1105 to clean the periphery of the screen 10 to prevent clogging. When not in use, the arc brush plate 1104 is stored in the lower part of the combination frame 9 to avoid interfering with screening. The corrugated folding plate 1106 extends and retracts with the connecting block 1103 to close the opening gap of the fixing trough plate 1101, preventing dust from entering the electric guide rail 1102, thereby increasing the crushing effect of the whole machine.
[0027] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.
Claims
1. A mill feed sealing device, comprising a support table (1), one side of the top of the support table (1) is fixedly installed with an output motor (2), and the other side of the top surface of the support table (1) is provided with a crusher (3), characterized in that: The crusher (3) includes a feeding trough plate (4) fixedly installed on one side of the top of the support platform (1). On opposite sides of the surface of the feeding trough plate (4), a power shaft (5) is rotatably installed together via a connecting shaft. A feeding trough plate (6) is rotatably installed on one side of the top of the feeding trough plate (4). A sealing assembly (7) is provided between the feeding trough plate (4) and the feeding trough plate (6). The sealing assembly (7) includes two sealing rings (701) disposed between the feed trough plate (4) and the feed trough plate (6). The cross-section of the two sealing rings (701) is three vertically arranged rhombuses, wherein the size of the central rhombus is smaller than that of the two rhombuses on both sides. Furthermore, both sealing rings (701) are hollow structures. Silicone valve cores (702) are embedded in opposite sides of the surface of the two sealing rings (701). The inner wall of the sealing rings (701) is attached with an enhanced interception mesh (703). The shaft wall of the power shaft (5) is fixedly installed with crushing teeth (8), and the opposite sides of the inner wall of the feed trough plate (4) are fixedly installed with combination frames (9). The two combination frames (9) are connected together with a screen (10), and the opposite sides of the inner wall of the feed trough plate (4) are provided with cleaning components (11).
2. The mill feed sealing device according to claim 1, characterized in that: The output end of the output motor (2) is fixedly connected to the first pulley (201), and the power shaft (5) is fixedly installed with the second pulley (202) at the same side as the first pulley (201), and a belt (203) is connected between the first pulley (201) and the second pulley (202).
3. The mill feed sealing device according to claim 1, characterized in that: A counterweight wheel (501) is fixedly installed on the side of the power shaft (5) away from the second pulley (202). The counterweight wheel (501) and the second pulley (202) are arranged symmetrically with respect to the axis of the power shaft (5).
4. A mill feed sealing device according to claim 1, characterized in that: The ends of the two sealing rings (701) are each set as semi-circular heads. The semi-circular heads of the two sealing rings (701) can be combined to form a circular combination strip, which is used to wrap and seal the surface of the power shaft (5).
5. A mill feed sealing device according to claim 1, characterized in that: The sealing ring (701) consists of three vertical rhombuses arranged symmetrically on the left and right, connected in series, forming a multi-level vertical rhombus sealing lip.
6. A mill feed sealing device according to claim 1, characterized in that: The silicone valve core (702) is used to prevent the material filled inside the sealing ring (701) from flowing out, and the sealing ring (701) is filled with Bingham thixotropic modified colloid.
7. A mill feed sealing device according to claim 1, characterized in that: The enhanced interception net (703) is a 316L stainless steel woven wire mesh.
8. A mill feed sealing device according to claim 1, characterized in that: The cleaning assembly (11) includes a fixed trough plate (1101) fixedly installed on the inner wall of the feed trough plate (4). An electric guide rail (1102) is fixedly installed on the inner wall of the fixed trough plate (1101), and a connecting block (1103) is fixedly installed at the output end of the electric guide rail (1102). An arc brush plate (1104) is fixedly installed on the two corresponding connecting blocks (1103), and stainless steel bristles (1105) are fixedly installed on the inner wall of the arc brush plate (1104).
9. A mill feed sealing device according to claim 8, characterized in that: Two cleaning components (11) are arranged around the screen (10), the thickness of the arc brush plate (1104) is less than the thickness of the combination frame (9), and a corrugated folding plate (1106) is fixedly installed on the surface of the connecting block (1103), and the surface of the corrugated folding plate (1106) is embedded in the interior of the fixing groove plate (1101).
10. A method for assembling and disassembling a mill feed sealing device, characterized in that: The mill feed sealing device according to any one of claims 1-9, wherein the method for assembling and disassembling the mill feed sealing device includes an installation step and a disassembly step: Installation steps: Step 1: Insert two sealing rings (701) between the unloading trough plate (4) and the feeding trough plate (6) so that the semi-circular ends of the two sealing rings (701) combine to form a circular combination strip that wraps around the surface of the power shaft (5). Step 2: Fill the sealing ring (701) with Bingham thixotropic modified colloid through one silicone valve core (702) while venting from the other silicone valve core (702) until the filling is complete; Step 3: Fix the feeding trough plate (6) and the unloading trough plate (4) with bolts; Disassembly steps: Step 1: Loosen the bolts between the feeding trough plate (6) and the unloading trough plate (4) to separate the feeding trough plate (6); Step 2: Remove the sealing ring (701).