A disc feeder anti-blocking structure

Abstract

The utility model discloses a kind of anti-blocking structures of disc feeder, including circular disc surface, rotary scraper and worm material sleeve. Rotating scraper is equipped in the middle of circular disc surface, worm material sleeve is fixed above circular disc surface, rotating scraper is located in the center of worm material sleeve and rotates along with circular disc surface, stirring material is prevented to block. Rotating scraper includes the fixed part of upper and lower conical body and intermediate cylinder, two layers of scraper of staggered arrangement are fixed on cylinder, and wear layer is built up on the surface of scraper. Circular disc surface is equipped with coupling seat and wear lining, worm material sleeve includes cylinder and helical shell, and discharge port scraping plate is located outside cylinder. The structure does not need additional driving device, utilizes circular disc surface to drive scraper, effectively prevents the blockage and arch of material with high viscosity, high humidity or poor flowability, simple structure, strong wear resistance, easy to maintain, suitable for mining, metallurgy, building materials and other industries.

Description

Technical Field

[0001] This utility model belongs to the technical field of disc feeders and relates to an anti-blocking structure for disc feeders. Background Technology

[0002] Disc feeders are continuous feeding devices widely used in industries such as mining, metallurgy, building materials, and chemicals. They are mainly used to uniformly transport granular or powdery materials to the next production stage. Their core components include a circular disc and a feed sleeve; the rotation of the disc discharges material from the feed sleeve. However, in actual production, disc feeders often face problems such as material blockage or bridging due to the characteristics of the materials, seriously affecting equipment operating efficiency and production stability.

[0003] Material blockage is primarily caused by the physical properties of the material. For example, highly viscous or moist materials (such as wet coal, clay, or water-containing mineral powder) tend to adhere to the inner wall of the feed sleeve, gradually accumulating and forming blockages. Powdered or fine-particle materials with poor flowability (such as fine fly ash or cement raw materials) are prone to arching within the feed sleeve due to high internal friction, leading to interrupted material flow. Traditional disc feeders typically use cylindrical or conical feed sleeves with scrapers placed inside, attempting to expel material through the movement of the scrapers. However, this design has limited effectiveness when handling viscous or highly moist materials; material may still accumulate on the inner wall of the feed sleeve, and the scraper's efficiency decreases due to material adhesion, further exacerbating the blockage problem. Furthermore, the limited internal space of the feed sleeve restricts the design and arrangement of the scraper, making it difficult to effectively handle complex material characteristics.

[0004] To address material blockage issues, existing technologies often employ additional anti-blocking devices or measures. For example, vibrating funnels promote material flow through mechanical vibration, but their effectiveness is limited by material type; they are less effective at clearing highly viscous materials, and frequent use of vibrating devices can lead to increased equipment wear and energy consumption. Silo vibrators reduce material adhesion through high-frequency vibration, but their installation and maintenance costs are high, and they are ineffective with highly viscous materials; vibration can also cause fatigue damage to the equipment structure. Air cannons use compressed air to impact materials and clear blockages, but their operation is complex, requires high equipment sealing, and frequent use increases energy consumption and maintenance costs. Furthermore, some disc feeders attempt to prevent blockages by adding additional drive units to power independent mixing or scraping mechanisms, forcibly agitating the material. However, this design significantly increases equipment complexity and manufacturing costs; the energy consumption and maintenance requirements of the additional drive units also increase operating costs, and long-term operation may reduce reliability due to wear of mechanical components.

[0005] Existing technologies also include some improved designs, such as optimizing the geometry of the sleeve (e.g., increasing the taper or changing the inner wall curvature) or incorporating turbulence structures within the sleeve to improve material flowability. These designs improve material flow efficiency to some extent, but are generally only effective for specific types of materials. For materials with high viscosity, high moisture content, or poor flowability, it is still difficult to completely avoid clogging. Furthermore, some improved designs require complex mechanical structures within the sleeve, such as multi-layered scrapers or rotating blades. These structures increase processing difficulty and manufacturing costs, and are difficult to maintain due to the limited internal space, potentially reducing long-term stability due to material accumulation or wear. Other technical solutions attempt to reduce material adhesion through surface treatments (e.g., applying a low-friction coating), but these coatings are prone to wear during long-term use and require periodic replacement, increasing maintenance costs.

[0006] The shortcomings of the existing technologies mentioned above are mainly reflected in the following aspects: First, the anti-blocking measures are not adaptable enough to the characteristics of materials, making it difficult to simultaneously handle materials with high viscosity, high moisture content, and poor flowability; second, additional drive devices or auxiliary equipment are required, leading to increased equipment investment and operating costs; third, the structure is complex, making processing and maintenance difficult, affecting the long-term reliability of the equipment; fourth, the effects of some improvement measures are unstable, requiring frequent maintenance or adjustments, making it difficult to meet the needs of continuous production. Therefore, there is an urgent need for an anti-blocking structure that is simple in structure, low in cost, and requires no additional drive device, which can effectively prevent material blockage and bridging of materials with high viscosity, high moisture content, or poor flowability, while ensuring the stability and economy of equipment operation. Utility Model Content

[0007] In view of this, the purpose of this utility model is to solve the above problems and provide a disc feeder anti-blocking structure. Through a simple structural design, it effectively prevents material blockage and arching, adapts to materials with high viscosity, high moisture or poor flowability, requires no additional drive device, reduces equipment investment and operating costs, and improves the operational stability and maintenance convenience of the equipment.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A disc feeder anti-clogging structure includes a circular disc, a rotating scraper, and a worm-shaped sleeve. The rotating scraper is located in the center of the circular disc, and the worm-shaped sleeve is fixed above the circular disc. The rotating scraper is located at the center of the worm-shaped sleeve and is fixedly connected to the circular disc, rotating with it to agitate the material inside the worm-shaped sleeve to prevent clogging. The rotating scraper includes a fixing part and a scraper blade. The upper and lower parts of the fixing part are conical, and the middle part is cylindrical. The scraper blade is fixed to the cylindrical part of the fixing part. The upper cone can separate the upper layer of material and eliminate material arching, while the lower cone can guide the lower layer of material to the surrounding areas. The staggered scrapers in the middle can forcibly agitate the material, activating it and preventing material sticking and clogging.

[0010] Furthermore, the cone angle of the upper cone of the fixing part is 30° to 80°, and the cone angle of the lower cone is 40° to 100°.

[0011] Furthermore, the scraper is arranged in two staggered layers on the cylindrical body of the fixing part.

[0012] Furthermore, the scraper has an inclined cutting angle at its edge, the angle of which is 30° to 45°, to improve the scraper's efficiency in cutting and agitating materials.

[0013] Furthermore, a connecting seat is provided in the middle of the circular disc, and the connecting seat is provided with bolt holes for fixing the rotating scraper.

[0014] Furthermore, the circular disc surface is provided with a wear-resistant liner in the area outside the connecting seat to enhance the wear resistance of the circular disc surface.

[0015] Furthermore, the surface of the rotary scraper is provided with a wear-resistant layer welded on it to improve the wear resistance of the scraper.

[0016] Furthermore, the volute sleeve includes a central cylindrical body and an outer volute shell. The volute shell has a discharge port at its end, and the discharge port is equipped with a scraper. The scraper is located outside the cylindrical body and is used to discharge the material. The volute shell has a spiral structure and is used to guide the material to flow towards the discharge port.

[0017] The beneficial effects of this utility model are as follows:

[0018] The anti-clogging structure of this invention for a disc feeder significantly improves the anti-clogging performance, operational stability, and economy of the equipment through optimized structural design. Specific beneficial effects are as follows:

[0019] 1. Highly efficient anti-clogging performance, requiring no additional drive device.

[0020] By incorporating a rotating scraper within a volute sleeve and utilizing the rotation of a circular disc to directly drive the scraper's rotation, this invention achieves forced agitation of the material, effectively preventing material accumulation and blockage within the sleeve. The rotation of the rotating scraper relies entirely on the existing power source of the circular disc, eliminating the need for an additional independent drive unit, thus simplifying the equipment structure and reducing manufacturing costs and energy consumption. Compared to existing solutions requiring additional motors or vibration devices, this design not only reduces equipment investment but also lowers operating and maintenance costs, while avoiding the potential failure risks associated with complex drive systems.

[0021] 2. Adaptable to various material properties, with excellent anti-clogging effect.

[0022] The rotating scraper's fixing part adopts an upper and lower conical structure with a middle cylindrical body. Combined with the staggered arrangement of the upper and lower scrapers, it can agitate materials in multiple dimensions. The upper cone effectively separates the upper layer of material, preventing powdery materials from forming arches due to internal friction; the lower cone guides the lower layer of material to flow outwards, reducing material accumulation at the bottom; the staggered arrangement of the middle scrapers activates the material through forced agitation, preventing highly viscous or moist materials from adhering to the inner wall of the material sleeve. This multi-layered structural design allows this invention to adapt to various materials with high viscosity, high moisture content, or poor flowability (such as wet coal, clay, and fine fly ash), significantly improving the versatility and reliability of the anti-clogging material.

[0023] 3. High wear resistance and long service life

[0024] Wear-resistant liners are laid on the area of ​​the circular disc outside the connecting seat, and a hard alloy wear-resistant layer is welded onto the surface of the rotating scraper. These wear-resistant designs significantly enhance the wear resistance of key components. In high-wear environments with long-term contact with granular or powdery materials, the wear-resistant liners and wear-resistant layers effectively protect the circular disc and scraper, reducing component damage caused by material abrasion and extending the service life of the equipment. Compared with easily worn scrapers or coatings in traditional designs, the wear-resistant layer of this invention uses a welding process, resulting in strong adhesion, high durability, and reduced maintenance frequency and replacement costs.

[0025] 4. Simple structure and convenient maintenance

[0026] This utility model features a simple anti-clogging material structure design, mainly composed of a circular disc, a rotating scraper, and a worm-shaped material sleeve. With fewer components and simpler processing and assembly techniques, it reduces manufacturing difficulty and cost. The rotating scraper is fixed to the circular disc via bolt holes in the connecting seat, facilitating easy disassembly and assembly. When the wear-resistant layer wears to a certain extent, the rotating scraper can be quickly removed for maintenance or replacement. Compared to the complex multi-layer scrapers or additional drive mechanisms in existing technologies, this design significantly reduces maintenance difficulty and technical requirements, making it suitable for industrial scenarios requiring long-term continuous operation.

[0027] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of the anti-clogging structure of the disc feeder in this utility model.

[0030] Figure 2 This is a top view of the anti-blocking structure of the disc feeder in this utility model.

[0031] Reference numerals: 1-Rotating scraper; 2-Scraper; 3-Fixing part; 4-Snail-shaped sleeve; 5-Cylindrical shell; 6-Helical shell; 7-Circular disc. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0034] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] Example 1: Anti-clogging structure for disc feeder used for wet coal conveying

[0036] like Figure 1 and Figure 2 As shown, the anti-clogging structure of the disc feeder in this embodiment includes a circular disc 7, a rotating scraper 1, and a worm-shaped material sleeve 4, which is suitable for continuous conveying of wet coal (moisture content of about 15%-20%) with high moisture content in the mining industry.

[0037] The circular disc 7 is made of high-strength steel plate with a diameter of 1.5 meters. A connecting seat is located in the middle, and the surface of the connecting seat is machined with 4 M20 bolt holes for fixing the rotating scraper 1. The surface of the circular disc 7 outside the connecting seat is covered with a 10 mm thick manganese steel wear-resistant liner, which is fixed by welding to enhance the wear resistance of the disc and adapt to the high abrasiveness of wet coal.

[0038] The rotating scraper 1 includes a fixing part 3 and scrapers 2. The fixing part 3 consists of upper and lower cones and a middle cylindrical body, all integrally formed from cast steel. The upper cone of the fixing part 3 has a cone angle of 60°, used to separate the upper layer of wet coal and prevent it from forming arches due to stickiness; the lower cone has a cone angle of 45°, used to guide the lower layer of wet coal to the surrounding areas, reducing bottom accumulation; the middle cylindrical body has a diameter of 200 mm and a height of 300 mm, and the upper and lower scrapers 2 are fixed on its surface. Each scraper 2 contains two rectangular scrapers, each measuring 150 mm × 50 mm × 10 mm. The upper and lower scrapers 2 are staggered at a 45° angle and fixed to the cylindrical body with bolts. The scraper 2 has a 2 mm thick hard alloy wear-resistant layer welded to its surface. The wear-resistant layer is made of cobalt-based alloy material to ensure long-term use in the abrasive environment of wet coal. The rotating scraper 1 is fixedly connected to the circular disc 7 by bolts on the connecting seat, and rotates with the circular disc 7 at a speed of 15 revolutions per minute without the need for an additional drive device.

[0039] The volute sleeve 4 is fixed above the circular disc 7 and connected to the outer frame via a bracket. The volute sleeve 4 includes a central cylindrical shell 5 and an outer spiral shell 6. The cylindrical shell has a diameter of 600 mm and a height of 800 mm, with a rotating scraper 1 located at its center. The spiral shell 6 is made of 8 mm thick steel plate, with a spiral angle of 30° and a rectangular discharge port at its end, measuring 300 mm × 200 mm. A scraper plate, 400 mm long and 150 mm wide, is welded to the outside of the discharge port, with an inclination angle of 45°, located outside the cylindrical shell, and is used to guide wet coal from the spiral shell to the next conveying stage.

[0040] In this embodiment, wet coal enters the cylindrical shell 5 of the volute sleeve 4 through the hopper. The rotating scraper 1 rotates with the circular disc 7, forcibly agitating the wet coal and preventing it from adhering to the inner wall of the cylinder due to its high viscosity and moisture content. The upper cone separates the upper layer of material, while the lower cone guides the lower layer. The staggered scrapers 2 activate the material, eliminating the risk of blockage. Under the agitation of the rotating scraper 1 and the centrifugal force of the circular disc 7, the material enters the spiral shell 6, flows along the spiral path, and is finally uniformly discharged through the external scraper. This embodiment has a simple structure, significant anti-blockage effect, is suitable for conveying highly viscous materials such as wet coal, operates stably, and has low maintenance costs.

[0041] Example 2: Anti-clogging structure for disc feeder used for conveying fine fly ash

[0042] like Figure 1 and Figure 2 As shown, the anti-clogging structure of the disc feeder in this embodiment also includes a circular disc 7, a rotating scraper 1, and a worm-shaped material sleeve 4, which is suitable for continuous conveying of fine fly ash (particle size of about 50-100 micrometers) with poor flowability in the building materials industry.

[0043] The circular disc 7 is made of carbon steel and has a diameter of 1.2 meters. It has a connecting seat in the middle, and the surface of the connecting seat is machined with 6 M16 bolt holes for fixing the rotating scraper 1. The surface of the circular disc 7 outside the connecting seat is covered with a ceramic wear-resistant liner with a thickness of 8 mm. It is fixed by both adhesive and bolts to enhance the wear resistance of the disc in the highly abrasive environment of fine fly ash.

[0044] The rotary scraper 1 includes a fixing part 3 and scrapers 2. The fixing part 3 consists of upper and lower cones and a middle cylindrical body, and is made of stainless steel casting to improve corrosion resistance. The upper cone of the fixing part 3 has a cone angle of 70°, which is used to separate the upper layer of fine fly ash and prevent it from forming arches due to internal friction; the lower cone has a cone angle of 50°, which is used to guide the lower layer of material to flow in all directions; the middle cylindrical body has a diameter of 180 mm and a height of 250 mm, and the upper and lower scrapers 2 are fixed on its surface. Each scraper 2 contains 6 arc-shaped scrapers, with dimensions of 120 mm × 40 mm × 8 mm. The upper and lower scrapers 2 are staggered at a 60° angle and fixed to the cylindrical body by welding. The scraper 2 has a 1.5 mm thick chromium-based hard alloy wear-resistant layer overlaid on its surface to ensure long-term use in the abrasive environment of fine fly ash. The rotary scraper 1 is fixedly connected to the circular disc 7 by bolts on the connecting seat and rotates with the circular disc 7 at a speed of 20 rpm without the need for an additional drive device.

[0045] The volute sleeve 4 is fixed above the circular disc 7 and connected to the outer frame via a steel bracket. The volute sleeve 4 comprises a central cylindrical body and an outer spiral shell 6. The cylindrical body has a diameter of 500 mm and a height of 700 mm, with a rotating scraper 1 located at its center. The spiral shell 6 is made of 6 mm thick steel plate, with a spiral angle of 25° and a rectangular discharge port at its end, measuring 250 mm × 150 mm. A scraper plate, 350 mm long and 120 mm wide, with a cutting angle of 40°, is welded to the outside of the discharge port and is used to guide fine fly ash from the spiral shell to the next conveying stage.

[0046] In this embodiment, fine fly ash enters the cylindrical body of the volute sleeve 4 through the hopper. The rotating scraper 1 rotates with the circular disc 7, forcibly agitating the fine fly ash and preventing it from forming arches due to its poor flowability. The upper cone separates the upper layer of material, while the lower cone guides the lower layer. The staggered scrapers 2 activate the material, eliminating the risk of blockage. Under the agitation of the rotating scraper 1 and the centrifugal force of the circular disc 7, the material enters the spiral shell 6, flows along the spiral path, and is finally uniformly discharged through the external scraper plate. This embodiment optimizes the number of scrapers 2 and the wear-resistant material for the characteristics of fine fly ash, resulting in excellent anti-blockage performance. It is suitable for conveying powdery materials with poor flowability, has a compact structure, and is reliable in operation.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A material blocking structure for a disc feeder, characterized in that: The device includes a circular disc, a rotating scraper, and a volute sleeve. The rotating scraper is located in the center of the circular disc, and the volute sleeve is fixed above the circular disc. The rotating scraper is located at the center of the volute sleeve and is fixedly connected to the circular disc and rotates with it to agitate the material inside the volute sleeve to prevent clogging. The rotating scraper includes a fixing part and a scraper. The upper and lower parts of the fixing part are conical, and the middle part is cylindrical. The scraper is fixed to the cylindrical part of the fixing part.

2. The anti-blocking structure for the disc feeder according to claim 1, characterized in that: The upper cone of the fixing part has a cone angle of 30° to 80°, and the lower cone has a cone angle of 40° to 100°.

3. The anti-blocking structure for the disc feeder according to claim 1, characterized in that: The scraper is arranged in two staggered layers on the cylindrical body of the fixed part.

4. The anti-blocking structure for the disc feeder according to claim 1, characterized in that: The scraper has an inclined cutting angle at its edge, which is 30° to 45°, to improve the scraper's efficiency in cutting and agitating materials.

5. The anti-blocking structure for the disc feeder according to claim 1, characterized in that: A connecting seat is provided in the middle of the circular disc, and the connecting seat is provided with bolt holes for fixing the rotating scraper.

6. The anti-blocking structure for the disc feeder according to claim 5, characterized in that: The circular disc surface is provided with a wear-resistant liner in the area outside the connecting seat to enhance the wear resistance of the circular disc surface.

7. The anti-blocking structure for the disc feeder according to claim 1, characterized in that: The surface of the rotary scraper is provided with a wear-resistant layer welded on it to improve the wear resistance of the scraper.

8. The anti-blocking structure for the disc feeder according to claim 1, characterized in that: The volute sleeve includes a central cylindrical body and an outer volute shell. The volute shell has a discharge port at its end, and the discharge port is equipped with a scraper. The scraper is located outside the cylindrical body and is used to discharge the material. The volute shell has a spiral structure to guide the material to flow towards the discharge port.

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