Sealing device for feeding part of overflow type ball mill
By designing an overflow-type sealing device with sealing rings, glands, and retaining rings at the ball mill feed section, the problem of slurry backflow was solved, achieving environmental protection and stable equipment operation.
Patent Information
- Application Number
- CN202423192405.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The gap between the ball mill feed liner and the feed bend causes slurry backflow, resulting in environmental pollution and making timely inspection and maintenance difficult, thus affecting production stability.
Design an overflow-type ball mill feed section sealing device, including a sealing ring, a gland, a flange, and a retaining ring. The slurry is guided by a spiral and fixed on the feed end cover. The flange and retaining ring are used for secondary sealing to prevent slurry backflow.
It effectively prevents slurry backflow, avoids environmental pollution, reduces wear on the feed liner, and improves equipment stability and ease of maintenance.
Smart Images
Figure CN223498665U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ball mill sealing technology, and in particular to an overflow-type ball mill feed section sealing device. Background Technology
[0002] Currently, most mining companies, both domestically and internationally, choose ball mills as their primary grinding equipment. Many grinding processes involve grinding first and then classifying the ore. The raw ore entering the ball mill is characterized by large particle size and sharp edges, causing severe wear on the feed liner and leading to perforation. Due to the ball mill's structure, it is difficult to inspect the feed liner's condition promptly. This delayed detection further results in wear of the hollow shaft, allowing slurry to enter the bearing, making repairs difficult, time-consuming, and disrupting production. The original design also had a gap between the ball mill's feed liner and the feed bend. When the feed rate was high or the ore was difficult to grind, slurry would flow back from the feed end, causing environmental pollution at the work site and increasing operational difficulties. Utility Model Content
[0003] To address the problem of slurry backflow caused by the gap between the feed bushing and the feed bend in existing ball mills, this invention provides an overflow-type ball mill feed section sealing device that can prevent slurry backflow and avoid environmental pollution.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] An overflow-type ball mill feed section sealing device, comprising:
[0006] A feed bend and a feed bushing, and a sealing assembly disposed between the feed bend and the feed bushing;
[0007] The sealing assembly includes a sealing ring, the inner wall of which is provided with a spiral line, and the spiral line is spirally arranged around the central axis of the sealing ring. The outer side of the sealing ring is provided with a pressure cap, and the pressure cap is connected to a flange through a connector. The flange is fixedly connected to the feed end cover of the ball mill.
[0008] As described above, the overflow ball mill feed section sealing device further includes flange bolt holes on the flange, and the flange is fixedly connected to the feed end cover of the ball mill by bolts.
[0009] The overflow ball mill feed section sealing device described above further includes a retaining ring, which has a retaining ring screw hole and is connected to the feed bend clamp by screws.
[0010] In the overflow ball mill feed section sealing device described above, the spiral is a double spiral structure, and the spiral is a left-handed structure.
[0011] As described above, the overflow ball mill feed sealing device further includes a right-angled angle steel with a model number of L50×5.
[0012] As described above, the overflow ball mill feed section sealing device further includes a cylindrical overall structure for the sealing assembly;
[0013] The sealing ring has a length of 353mm, a thickness of 94mm, an inner diameter of 576mm, an outer diameter of 940mm, and a distance of 2mm between the sealing ring and the feed bushing.
[0014] The height of the spiral is 22mm, the width of the spiral is 20mm, the interval between the spirals is 125mm, and the distance between the spiral and the feed bend is 2mm.
[0015] The length of the pressure cap is 120mm, and the height of the pressure cap is 115mm;
[0016] The flange is 155mm long, 16mm wide, and has a bolt hole inner diameter of 26mm.
[0017] As described above, the overflow ball mill feed sealing device further includes a conical overall structure for the retaining ring, a length of 70mm, a thickness of 40mm, an inner diameter of 595mm, an outer diameter of 675mm, and an inner diameter of 14mm for the retaining ring screw hole.
[0018] In the overflow ball mill feed section sealing device described above, the sealing ring is further made of polyurethane.
[0019] In the overflow ball mill feed section sealing device described above, the flange is further made of stainless steel.
[0020] In the overflow ball mill feed sealing device described above, the retaining ring is made of polyurethane.
[0021] Compared with the prior art, the advantages of this utility model are as follows:
[0022] 1. The spiral of this utility model can guide the backflowing slurry into the ball mill, thus avoiding environmental pollution;
[0023] 2. The retaining ring of this utility model is installed at the inlet end of the sealing component and the feed bend of the clamp, which plays a secondary sealing role and also avoids the occurrence of perforation of the feed bushing.
[0024] 3. The overall structure of this utility model is simple, easy to manufacture and install, and highly practical. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the overall structure of the device according to an embodiment of the present utility model;
[0027] Figure 2 This is a front view of the sealing assembly structure according to an embodiment of the present utility model;
[0028] Figure 3 This is a side view of the sealing assembly structure according to an embodiment of the present utility model;
[0029] Figure 4 This is a front view of the retaining ring structure according to an embodiment of the present utility model;
[0030] Figure 5 This is a side view of the retaining ring structure according to an embodiment of the present utility model;
[0031] In the diagram: 1. Sealing ring; 2. Gland; 3. Spiral; 4. Flange; 5. Flange bolt hole; 6. Connector; 7. Feed bushing; 8. Feed bend; 9. Retaining ring; 10. Retaining ring bolt hole. Detailed Implementation
[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0033] Example:
[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments of this utility model are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.
[0035] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0036] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0038] This utility model provides a technical solution: an overflow ball mill feed section sealing device, which includes a feed bend 8 and a feed bushing 7, and a sealing assembly disposed between the feed bend 8 and the feed bushing 7. The sealing assembly includes a sealing ring 1, the inner side wall of the sealing ring 1 is provided with a spiral line 3, and the spiral line 3 is spirally arranged around the central axis of the sealing ring 1. The outer side of the sealing ring 1 is provided with a pressure cap 2, and the pressure cap 2 is connected to a flange 4 through a connector 6. The flange 4 is fixedly connected to the feed end cover of the ball mill.
[0039] Specifically, the sealing ring 1 is embedded between the feed bend 8 and the feed bushing 7 of the ball mill for initial sealing. This allows the spiral 3 within the sealing ring 1 to guide backflowing slurry into the ball mill when the feed rate is high or the ore is difficult to grind, thus preventing environmental pollution. Simultaneously, the sealing ring 1 is reinforced by the outer circumferential cap 2 to ensure its stability. The cap 2 is connected to a flange 4 via a connector 6, and then fixed to the feed end cover of the ball mill via the flange 4, resulting in high stability for the entire sealing assembly. Furthermore, the connector 6 may include, but is not limited to, bolts and nuts, angle steel connectors, etc.
[0040] As an optional implementation, in some embodiments, flange 4 is provided with flange bolt holes 5, and flange 4 is fixedly connected to the feed end cover of the ball mill by bolts. The fixing method using flange bolt holes 5 and bolts provides good tightness and facilitates installation and disassembly.
[0041] As an optional implementation, some embodiments further include a retaining ring 9, which has retaining ring screw holes 10. The retaining ring 9 is connected to the clamp of the feed bend 8 by screws. Adding a retaining ring 9 to the clamp of the feed bend 8 serves two purposes: firstly, it further reduces the spacing, providing a secondary seal; secondly, it prevents sharp-edged or large-particle ore from abrading the feed bushing 7 and causing perforation, thus ensuring stable equipment production. The fixing method using retaining ring screw holes 10 and screws provides good tightness and facilitates installation and disassembly.
[0042] As an optional implementation, in some embodiments, the helix 3 has a double-helix structure, and the helix 3 has a left-handed structure. The double-helix structure has better flow guiding effect, and the left-handed or right-handed structure of the helix 3 can be adjusted according to actual conditions to meet the requirement of guiding the backflowing slurry into the ball mill.
[0043] As an optional implementation, in some embodiments, the connector 6 is a right-angled angle steel, specifically model L50×5. The right-angled angle steel, with its unique L-shaped design, can remain stable under pressure and tension, and is not easily deformed. The specific model can be adjusted according to actual usage.
[0044] As an optional implementation, in some embodiments, the overall structure of the sealing assembly is cylindrical. The sealing ring 1 has a length of 353 mm, a thickness of 94 mm, an inner diameter of 576 mm, an outer diameter of 940 mm, a distance of 2 mm between the sealing ring 1 and the feed bushing 7, a height of 22 mm for the spiral 3, a width of 20 mm for the spiral 3, a spacing of 125 mm between the spiral 3 and the feed bend 8, a length of 120 mm for the gland 2, a height of 115 mm for the gland 2, a length of 155 mm for the flange 4, a width of 16 mm for the flange 4, and an inner diameter of 26 mm for the flange bolt hole 5. The cylindrical shape of the sealing assembly is more suitable for installation between the feed bushing 7 and the feed bend 8. Furthermore, the dimensions of the sealing ring 1, gland 2, spiral 3, and flange 4 are more reasonable, resulting in better overall performance. Additionally, the shape of the sealing assembly and the dimensions of each component can be adjusted according to actual usage.
[0045] As an optional implementation, in some embodiments, the retaining ring 9 has an overall conical structure, a length of 70mm, a thickness of 40mm, an inner diameter of 595mm, an outer diameter of 675mm, and an inner diameter of the retaining ring screw hole 10 of 14mm. The conical shape of the retaining ring 9 allows for better installation at the clamp of the feed bend 8, and its dimensions are more reasonable. Furthermore, the shape and dimensions of the retaining ring 9 can be adjusted according to actual usage.
[0046] As an optional implementation, in some embodiments, the sealing ring 1 is made of polyurethane. The sealing ring 1 made of polyurethane has excellent sealing performance, effectively preventing media leakage and ensuring the normal operation of the equipment.
[0047] As an optional implementation, in some embodiments, the flange 4 is made of stainless steel. The stainless steel flange 4 possesses high strength and durability. It can withstand high-toughness pressure mechanical loads without easily deforming or being damaged, making it suitable for the operating environment of ball mills.
[0048] As an optional implementation, in some embodiments, the retaining ring 9 is made of polyurethane. The retaining ring 9 made of polyurethane has high hardness and wear resistance, and can operate for extended periods under conditions of frequent contact and friction without easily wearing down.
[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0050] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the substance of the content of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A sealing device for the feed section of an overflow ball mill, characterized in that, include: A feed bend and a feed bushing, and a sealing assembly disposed between the feed bend and the feed bushing; The sealing assembly includes a sealing ring, the inner wall of which is provided with a spiral line, and the spiral line is spirally arranged around the central axis of the sealing ring. The outer side of the sealing ring is provided with a pressure cap, and the pressure cap is connected to a flange through a connector. The flange is fixedly connected to the feed end cover of the ball mill.
2. The overflow ball mill feed section sealing device according to claim 1, characterized in that, The flange has flange screw holes, and the flange is fixedly connected to the feed end cover of the ball mill by screws.
3. The overflow ball mill feed section sealing device according to claim 1, characterized in that, It also includes a retaining ring, which has a retaining ring screw hole, and the retaining ring is connected to the clamp of the feed bend by screws.
4. The overflow-type ball mill feed section sealing device according to claim 1, characterized in that, The spiral has a double helix structure, and the spiral is a left-handed structure.
5. The overflow ball mill feed section sealing device according to claim 1, characterized in that, The connector is a right-angled angle steel, model L50×5.
6. The overflow ball mill feed section sealing device according to claim 2, characterized in that, The overall structure of the sealing assembly is cylindrical; The sealing ring has a length of 353mm, a thickness of 94mm, an inner diameter of 576mm, an outer diameter of 940mm, and a distance of 2mm between the sealing ring and the feed bushing. The height of the spiral is 22mm, the width of the spiral is 20mm, the interval between the spirals is 125mm, and the distance between the spiral and the feed bend is 2mm. The length of the pressure cap is 120mm, and the height of the pressure cap is 115mm; The flange is 155mm long, 16mm wide, and has a bolt hole inner diameter of 26mm.
7. The overflow ball mill feed section sealing device according to claim 3, characterized in that, The retaining ring has a conical overall structure, a length of 70mm, a thickness of 40mm, an inner diameter of 595mm, an outer diameter of 675mm, and an inner diameter of 14mm for the screw hole.
8. The overflow ball mill feed section sealing device according to claim 1, characterized in that, The sealing ring is made of polyurethane.
9. The overflow ball mill feed section sealing device according to claim 1, characterized in that, The flange is made of stainless steel.
10. The overflow ball mill feed section sealing device according to claim 3, characterized in that, The retaining ring is made of polyurethane.