Raking assembly for disc dryer

Abstract

The utility model relates to the technical field of drying equipment, in particular to a raking assembly for a disc dryer. The utility model provides a material raking assembly for a disc dryer, which comprises a shaft holding device composed of symmetrically arranged clamping plates, and the clamping plates are connected through bolts to form interference fit with a transmission shaft; the supporting plates are circumferentially and uniformly arranged outside the shaft holding device at intervals and are C-shaped, and rake rods are arranged on the surfaces of the supporting plates in a manner of vertically extending outwards; the rake rod is uniformly sleeved with a plurality of rake springs at intervals in the axial direction, and the ends of the rake springs are connected with the L-shaped rake frame through bolts; the harrow plate is fixed below the harrow frame through bolts, and a gap of 0.5-1cm is reserved between the lower surface of the harrow plate and the disc surface of the drying machine.

Description

Technical Field

[0001] This application relates to the field of drying equipment technology, and in particular to a rake assembly for a disc dryer. Background Technology

[0002] In the lithium battery industry, the rake assembly of disc dryers is widely used in the drying process of raw materials such as lithium carbonate, lithium hydroxide monohydrate, ternary precursors, and manganese tetroxide due to its advantages such as simple operation, high thermal efficiency, and high drying efficiency. To prevent material residue, traditional disc dryer rake assemblies often adopt a floating rake blade design, in which the rake blades and rake plates are in direct contact with the drying disc surface. However, this design can lead to wear between the rake blades and the disc surface during operation, generating metal particles. These particles may cause product defects in subsequent lithium battery production.

[0003] To address this issue, improved solutions have emerged that replace metal or ceramic rake plates with heat-resistant plastic polymer materials (such as nylon, polytetrafluoroethylene, polyoxymethylene, polyetheretherketone, etc.). However, in practical applications, these materials may still generate metal / non-metal particles due to friction with the disc surface. Utility Model Content

[0004] The problem this application aims to solve is that existing rake blades experience contact wear with the disc surface during the operation of the dryer, resulting in the generation of metal particles mixed into the lithium battery raw materials, which leads to a decrease in the purity of the lithium battery raw materials.

[0005] To address the aforementioned technical problems, this application provides a rake assembly for a disc dryer, comprising a shaft clamp consisting of symmetrically arranged clamping plates connected by bolts to form an interference fit with the drive shaft; support plates, evenly spaced circumferentially outside the shaft clamp in a C-shape, with rake rods extending vertically outward from their surfaces; rake rods, with multiple rake springs evenly spaced axially, the ends of which are connected to an L-shaped rake frame by bolts; and rake plates, fixed to the underside of the rake frame by bolts, with a 0.5-1cm gap between their lower surfaces and the dryer disc surface.

[0006] Because the rake assembly of this application is designed with a 0.5-1cm gap between the lower surface of the rake plate and the dryer disc, dynamic friction between the rake plate and the drying disc is effectively avoided by designing the gap between the rake plate and the drying disc, thereby reducing the generation of metal and non-metal particles, improving the purity of lithium battery raw materials, and solving the problem that in the prior art, the rake blades would come into contact with and wear against the disc during the operation of the dryer, resulting in the generation of metal particles mixed into the lithium battery raw materials, which would lead to a decrease in the purity of the lithium battery raw materials. Attached Figure Description

[0007] Figure 1 This is a top view of the structure of an embodiment.

[0008] Figure 2 This is a schematic diagram of the supportless structure in an embodiment.

[0009] Figure 3 This is a schematic diagram of the support sleeve structure in an embodiment.

[0010] In the diagram: 1. Shaft clamp; 2. Support plate; 3. Rake rod; 4. Support rod; 5. Rake spring; 6. Rake plate; 7. Rake frame; 8. Support sleeve. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of this application.

[0012] This application relates to a rake assembly for a disc dryer, such as... Figure 1-3 As shown, the dryer includes a shaft clamp 1, a support plate 2, rake rods 3, rake plates 6, and support rods 4. The shaft clamp 1 consists of symmetrically arranged clamps connected by bolts to form an interference fit with the drive shaft. To enhance the connection strength, keyways can be provided on the inner walls of the clamps. The support plates 2 are evenly and spaced around the outside of the shaft clamp 1 in a C-shape. Rake rods 3 are vertically arranged on the surface of the support plates 2. Rake springs 5 ​​are evenly and spaced along the axial direction of the upper part of the rake rods 3 and are sleeved with them. The ends of the rake springs 5 ​​are connected to L-shaped rake frames 7 by bolts. The rake plates 6 are arranged below the rake frames 7 and are connected to the rake frames 7 by bolts. The rake plates 6 are made of a high-polymer material with a temperature resistance greater than 80℃, such as polytetrafluoroethylene, polyoxymethylene, or polyetheretherketone. Support rods 4 are also vertically arranged on the surface of the support plates 2. The support rod 4 and the rake plate 6 are arranged side by side with the rake rod 3 to support the rake spring 5. The design of the support rod 4 and the rake plate 6 leaves a gap of 0.5-1cm between the lower surface of the rake plate 6 and the plate surface of the dryer to avoid dynamic friction. To improve the stability of the support rod 4, a support sleeve 8 connected to the support rod 4 is arranged at one end of the rake plate 6. The rake frame 7 and the support sleeve 8 work together to stably support the rake spring 5. In order to reduce the resistance during scraping, the included angle between the surface of the rake plate 6 and the axis of the rake rod 3 is 45-50°, preferably 46°. The tilt angle and orientation of the rake plate 6 can also be changed by adjusting the bolts between the rake frame 7 and the rake spring 5.

[0013] The rake frame 7 is made of 304 stainless steel, 316L stainless steel, 2205 stainless steel, TA or other malleable metal materials, and is made by stamping metal steel plates or welding and bending metal round steel.

[0014] The upper fixing bolt holes of the rake plate 6 adopt a structure with more than two holes.

[0015] The support rod 4 is made of a malleable metal similar to that of the rake frame 7.

[0016] To prevent the introduction of foreign objects, the surface of the rake handle 3 is coated with Teflon or covered with PTFE tubing.

[0017] By designing the gap between the rake plate 6 and the disc surface, direct friction between the rake plate 6 and the disc surface is effectively avoided, significantly reducing the generation of metal and non-metal particles, reducing the introduction of foreign matter, improving the purity of lithium battery raw materials, and thus improving the quality of the final product. The rake plate 6 and the rake frame 7 are connected by bolts, which facilitates disassembly and replacement and reduces maintenance costs. The selection of the material of the rake plate 6 and the surface treatment of the rake rod 3 makes the device suitable for drying raw materials in a variety of high-temperature and corrosive environments.

[0018] In use, first, fix the shaft clamp 1 to the drive shaft with bolts, ensuring an interference fit between the clamp and the drive shaft. If necessary, a keyway can be made on the inner wall of the clamp to enhance connection stability. Next, arrange the C-shaped support plates 2 evenly and at intervals on the outside of the shaft clamp 1 and fix them by welding or bolts. Vertically install the rake rods 3 and support rods 4 on the surface of the support plates 2, ensuring they are arranged side by side, and evenly and at intervals, attach the rake springs 5 ​​to the upper part of the rake rods 3 along their axial direction. Connect the L-shaped rake frame 7 to the rake springs 5 ​​with bolts. The rake plate 6 is fixed to the end of the rake frame 7 with bolts. Finally, a support sleeve 8 is installed at one end of the rake plate 6 and connected to the support rod 4 to enhance the stable support of the support rod 4 for the rake spring 5. After installation, the gap between the lower surface of the rake plate 6 and the dryer disc needs to be adjusted. By adjusting the length of the support rod 4 or the installation position of the rake plate 6, the gap is ensured to be within the range of 0.5-1cm to avoid direct friction between the rake plate 6 and the disc surface. The installed and adjusted rake assembly is then installed into the rake assembly for the disc dryer to ensure transmission. The shaft is connected to the dryer's drive system. When the dryer is started, the drive shaft begins to rotate, causing the shaft clamp 1 and support plate 2 to rotate together. The rake rod 3 and rake spring 5, driven by the support plate 2, rotate along with it, loosening and turning the material on the disc surface. Because there is a gap between the rake plate 6 and the disc surface, the rake plate 6 will not directly rub against the disc surface during rotation, thus effectively reducing the generation of metal / non-metal particles. Regularly check the tightness of all connections in the rake assembly; if any are loose, tighten them promptly. Regularly inspect the wear of vulnerable parts such as rake plate 6, rake spring 5, and support rod 4. If severe wear is found, replace them promptly. When cleaning the dryer, the rake assembly should also be disassembled and cleaned to ensure its surface cleanliness. During use, avoid subjecting the rake assembly to excessive impact to prevent damage to its structure. If it is necessary to replace parts such as rake plate 6 or rake spring 5, select replacements of the same or compatible materials and specifications. When disassembling and installing the rake assembly, be careful to avoid scratching or damaging the dryer's disc surface.

[0019] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0020] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0021] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rake assembly for a disc dryer, characterized in that: include The shaft clamp consists of symmetrically arranged clamping plates, which are connected by bolts to form an interference fit with the drive shaft. Support plates are evenly spaced around the outside of the shaft holder in a C-shape, and rake rods are set vertically outward on their surface; The rake bar is fitted with multiple rake springs at even intervals along the axial direction, and the ends of the rake springs are connected to the L-shaped rake frame by bolts. The rake plate is fixed to the bottom of the rake frame with bolts, and its lower surface leaves a gap of 0.5-1cm with the surface of the dryer tray.

2. The rake assembly for a disc dryer according to claim 1, characterized in that: It also includes a support rod, which is arranged side by side with the rake rod on the upper part of the support plate to support the rake spring.

3. The rake assembly for a disc dryer according to claim 2, characterized in that: It also includes a support sleeve, which is fixed to the end of the rake plate and connected to the support rod, and works with the rake frame to stably support the rake spring.

4. The rake assembly for a disc dryer according to claim 1, characterized in that: The support plate is fixed to the outside of the bearing by welding or bolting, and the circumferentially distributed interval angle is equally divided.

5. The rake assembly for a disc dryer according to claim 1, characterized in that: Multiple rake springs are arranged at uniform intervals along the rake rod axis by means of sleeve connection.

6. The rake assembly for a disc dryer according to claim 1, characterized in that: The rake frame is made of stamped metal steel plate or welded and bent round steel, and has two or more bolt holes for connecting to the rake plate.

7. The rake assembly for a disc dryer according to claim 2, characterized in that: The length of the support rod is adjustable to accommodate adjustments in the gap between the rake plate and the disc surface.

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