Rake arm structure of disc dryer and disc dryer

Abstract

The utility model relates to the field of disc dryers, and discloses a rake arm structure of a disc dryer. The rake arm structure comprises a rake rod, rake blades and a pressing wheel, one end of the rake rod is used for being fixedly connected with a main shaft of the disc type drying machine, the rake blades are fixedly arranged on the rake rod and used for stirring materials on a drying disc of the disc type drying machine, and the pressing wheel is fixedly connected with the rake rod and used for rolling the materials on the drying disc. The rake rod is fixedly connected with a main shaft of the disc dryer, so that the rake rod can rotate along with the main shaft; the harrow blades arranged on the harrow rods can stir materials on the drying disc, so that the materials are in full contact with the drying disc, and the drying efficiency of the materials is improved; the pressing wheel connected with the rake rod can grind the high-water-content materials on the drying disc, so that the sizes of the materials are reduced, the high-water-content materials are dried, the situation that the high-water-content materials are stacked on the rake blades to cause overload operation of the main shaft can be avoided, the materials can make full contact with the drying disc, and the material drying efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of disc dryer technology, specifically to a rake arm structure for a disc dryer and a disc dryer. Background Technology

[0002] A disc dryer is a drying device that primarily uses heat conduction. It features high thermal efficiency, low power consumption, uniform heating of materials, minimal material loss, and stable product quality, and is widely used in industries such as chemical, food, and pharmaceutical. A disc dryer consists of a vertically arranged rotating shaft and drying discs coaxial with the shaft. Rakes with multiple rake blades are connected to the shaft. As the shaft rotates, the rakes agitate the material on the drying discs, ensuring uniform heating and achieving drying.

[0003] Existing disc dryers typically require the moisture content of the material entering the dryer to be below 20%, and the size of the material should generally not exceed the gap between the rake blades. If the moisture content of the material is high or the viscosity is high, the material cannot make effective contact with the drying disc, which will reduce the drying effect. Furthermore, because the material with high moisture content is larger in size, it will cause the material to accumulate between the rake blades, causing the shaft to operate under overload and resulting in damage to the disc continuous dryer. Utility Model Content

[0004] The purpose of this invention is to overcome the problem in the existing technology that large-sized materials are prone to accumulate between the rake blades, causing the rake blades to operate under overload. This invention provides a rake arm structure for a disc dryer and a disc dryer. The rake arm structure has the technical effect of drying materials with high moisture content, improving the drying effect of the materials, avoiding material accumulation between the rake blades, and avoiding overload operation of the rotating shaft.

[0005] To achieve the above objectives, this utility model provides a rake arm structure for a disc dryer, comprising: a rake rod, one end of which is fixedly connected to the main shaft of the disc dryer; rake blades, which are fixedly mounted on the rake rod and used to agitate the material on the drying disc of the disc dryer; and a pressure roller, which is fixedly connected to the rake rod and used to crush the material on the drying disc.

[0006] Preferably, the pressure roller is positioned behind the rake blade along the rotation direction of the main shaft.

[0007] Preferably, there are multiple rake blades, which are spaced apart along the axial direction of the rake rod; and there are multiple pressure rollers, each pressure roller corresponding to at least one rake blade; or there is one pressure roller, which corresponds to multiple rake blades.

[0008] Preferably, the rotation axis of the pressure roller intersects and is perpendicular to the axis of the main shaft.

[0009] Preferably, the rake arm structure further includes a connector for fixing the pressure roller to the rake arm, and the pressure roller is rotatably mounted on the connector.

[0010] Preferably, the connector includes: two connecting rods, one end of which is fixedly connected to the rake rod; and a connecting shaft, both ends of which are fixedly connected to the other ends of the two connecting rods, and the pressure roller is rotatably mounted on the connecting shaft.

[0011] Preferably, the rake arm structure further includes multiple sleeves, which are fixedly disposed on the rake arm, and the sleeves and adjacent rake blades form a space for material to pass through.

[0012] Preferably, the rake blade includes: a rake blade sleeve, which is fixedly connected to the rake rod; a rake blade connecting plate, one end of which is fixedly connected to the rake blade sleeve; and a rake blade body, which is fixedly connected to the other end of the rake blade connecting plate. The rake blade body is angled to the rake rod, and the angles formed between the plurality of rake blade bodies and the rake rod are the same.

[0013] The second aspect of this utility model provides a disc dryer, which includes a main shaft, a drying disc, and a plurality of rake arm structures as described in any of the above embodiments, wherein the plurality of rake arm structures are evenly distributed along the circumference of the main shaft.

[0014] Preferably, a plurality of drying trays are provided, and the plurality of drying trays are distributed at intervals along the axial direction of the main shaft.

[0015] Through the above technical solution, the rake bar is fixedly connected to the main shaft of the disc dryer, so that when the main shaft rotates, the rake bar can rotate with the main shaft, thereby driving the rake blades and pressure rollers on the rake bar to rotate relative to the drying disc, so as to move and crush the material on the drying disc; the rake blades set on the rake bar can move the material on the drying disc, and the material can make full contact with the drying disc through the turning of the material, thereby improving the drying efficiency of the material; the pressure rollers fixedly connected to the rake bar can crush the high moisture content material on the drying disc, so as to reduce the size of the material on the drying disc, thereby effectively processing the high moisture content material. This not only avoids the overload operation of the main shaft caused by the accumulation of high moisture content material on the rake blades, thus avoiding damage to the disc dryer, but also makes full contact between the material and the drying disc, increases the contact area between the material and the drying disc, shortens the material processing time, reduces the material drying temperature, and thus improves the material drying efficiency. Attached Figure Description

[0016] Figure 1This is a partial structural schematic diagram of the disc dryer provided in this embodiment of the utility model;

[0017] Figure 2 This is a partial structural diagram of the rake arm structure of the disc dryer provided in this embodiment of the utility model.

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Rake handle; 2. Main shaft; 3. Rake blade; 31. Rake blade sleeve; 32. Rake blade connecting plate; 33. Rake blade body; 4. Drying tray; 5. Pressure roller; 6. Connecting parts; 61. Connecting rod; 62. Connecting shaft; 7. Sleeve. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0021] See Figure 1 To address the problem that existing disc dryers cannot dry materials with high moisture content, and that materials with high moisture content tend to accumulate between the rake blades 3, causing the main shaft 2 to operate under overload, this utility model provides a rake arm structure for a disc dryer. The rake arm structure includes a rake rod 1, rake blades 3, and a pressure roller 5. One end of the rake rod 1 is fixedly connected to the main shaft 2 of the disc dryer. The rake blades 3 are fixedly mounted on the rake rod 1 and are used to move the material on the drying disc 4 of the disc dryer. The pressure roller 5 is fixedly connected to the rake rod 1 and is used to crush the material on the drying disc 4. The rake 1 is fixedly connected to the main shaft 2 of the disc dryer, so that when the main shaft 2 rotates, the rake 1 can rotate with the main shaft 2, thereby driving the rake blades 3 and pressure rollers 5 on the rake 1 to rotate relative to the drying disc 4, so as to move and crush the material on the drying disc 4. The rake blades 3 set on the rake 1 can move the material on the drying disc 4, and the material can make full contact with the drying disc 4 through the turning of the material, thereby improving the drying efficiency of the material. The pressure rollers 5 fixedly connected to the rake 1 can crush the high moisture content material on the drying disc 4, thereby reducing the size of the material on the drying disc 4, thus effectively drying the high moisture content material. This not only avoids the rake blades 3 from accumulating high moisture content material and causing overload operation of the rake blades 3, thereby preventing damage to the disc dryer, but also makes full contact between the material and the drying disc 4, increasing the contact area between the material and the drying disc 4, shortening the material processing time, reducing the material drying temperature, and thus improving the material drying efficiency.

[0022] Compared to existing disc dryers that can only dry materials with a moisture content of less than 20%, the rake arm structure of this invention can dry materials with a higher moisture content (greater than 30%) and greater viscosity, thereby significantly improving the processing range of disc dryers for materials with different moisture contents.

[0023] As one implementation method, see Figure 1 Along the rotation direction of main shaft 2 (e.g.) Figure 1 (As indicated by the middle arrow), the pressure roller 5 is located behind the rake blade 3. After the rake blade 3 moves the material on the drying tray 4, the pressure roller 5 can crush the material passing through the gaps in the rake blade 3. Under the combined action of the rake blade 3 moving and the pressure roller 5 crushing, the size of the high moisture content material on the drying tray 4 can be reduced, thereby effectively improving the drying efficiency of the material.

[0024] To fully agitate the material on the drying tray 4 and improve drying efficiency, multiple rake blades 3 are provided, spaced apart along the axial direction of the rake rod 1. Multiple pressure rollers 5 are also provided, each corresponding to at least one rake blade 3. When the main shaft 2 drives the rake rod 1 to rotate, the multiple rake blades 3 effectively agitate the material on the drying tray 4. The pressure rollers 5 corresponding to the rake blades 3 can then crush the material after it has been agitated, improving the crushing efficiency and thus enhancing the drying efficiency.

[0025] In one implementation, each pressure roller 5 is configured to correspond to two rake blades 3.

[0026] In one embodiment, multiple rake blades 3 are provided, which are spaced apart along the axial direction of the rake handle 1. A single pressure roller 5 is provided, which is corresponding to the multiple rake blades 3. The rake handle 1 is provided with multiple rake blades 3 and a pressure roller 5. The pressure roller 5 is located behind the multiple rake blades 3 and is used to crush the material moved by the multiple rake blades 3.

[0027] To ensure stable rotation of the pressure roller 5 without being subjected to forces other than those exerted by the drying tray 4, the rotation axis of the pressure roller 5 intersects and is perpendicular to the axis of the main shaft 2. The intersection of the rotation axis of the pressure roller 5 and the axis of the main shaft 2, meaning the rotation direction of the pressure roller 5 is the same as that of the main shaft 2, and the perpendicularity of the rotation axis of the pressure roller 5 to the main shaft 2, effectively prevents the pressure roller 5 from being subjected to forces other than the frictional force between the drying tray 4 and the pressure roller 5 during rotation, thus ensuring the normal and stable rotation of the pressure roller 5.

[0028] To achieve the rotation of the pressure roller 5 and the fixed connection between the pressure roller 5 and the rake rod 1, see [reference needed]. Figure 1 and Figure 2The rake arm structure also includes a connector 6, which is used to fix the pressure roller 5 to the rake arm 1, and the pressure roller 5 is rotatably mounted on the connector 6. The connector 6 can firmly connect the pressure roller 5 to the rake arm 1, preventing the pressure roller 5 from moving or shaking during rotation. The rotatable mounting of the pressure roller 5 relative to the connector 6 allows the pressure roller 5 to rotate relative to the drying tray 4, thereby crushing the material on the drying tray 4 to facilitate the drying of the material.

[0029] In one embodiment, the connector 6 includes two connecting rods 61 and a connecting shaft 62. One end of each connecting rod 61 is fixedly connected to the rake rod 1, and both ends of the connecting shaft 62 are fixedly connected to the other ends of the two connecting rods 61 respectively. The pressure roller 5 is rotatably mounted on the connecting shaft 62. The connecting rods 61 are used to fix the pressure roller 5 mounted on the connecting shaft 62 to the rake rod 1, preventing the rake rod 1 from moving. The rotational mounting of the pressure roller 5 and the connecting shaft 62 allows the pressure roller 5 to rotate on the drying tray 4, thereby crushing the material on the drying tray 4.

[0030] See Figure 1 and Figure 2 In order to make the rotation axis of the pressure roller 5 intersect and be perpendicular to the axis of the main shaft 2, the two connecting rods 61 are of different lengths, so that the rotation direction of the pressure roller 5 is the same as the rotation direction of the main shaft 2, thereby avoiding the pressure roller 5 from being subjected to external forces during rotation.

[0031] In one embodiment, the length of the connecting rod 61 on the side of the connector 6 closer to the spindle 2 is less than the length of the connecting rod 61 on the side farther from the spindle 2.

[0032] To prevent material from accumulating on the rake blades 3 on the drying tray 4, and to adjust the gap between the rake blades 3, the rake arm structure also includes multiple sleeves 7. These sleeves 7 are fixedly installed on the rake arm 1, forming a space between the sleeves 7 and adjacent rake blades 3 for material to pass through. This space allows material to pass through, preventing it from being rotated by the rake blades 3 and from accumulating on them. This allows the material to be compacted by the pressure rollers 5 located behind the rake blades 3, improving the drying effect.

[0033] See Figure 1 and Figure 2 A pressure roller 5 is provided behind the two rake blades 3 and a sleeve 7. The pressure roller 5 can crush the material after it is moved by the two rake blades 3 and the material passing under the sleeve 7.

[0034] See Figure 1 In one implementation, the sleeve 7 separates two adjacent rake blades 3 and forms a space for material to pass through with the two adjacent rake blades 3.

[0035] As one implementation method, the arrangement of the rake blades 3 and the sleeves 7 is determined according to the size of the material on the drying tray 4. When the material on the drying tray 4 has a high moisture content and a large size, at least two sleeves 7 are provided between the two rake blades 3 to ensure that the material can pass through the space between the two rake blades 3 and the two sleeves 7; when the material on the drying tray 4 has a low moisture content and a small size, the number of sleeves 7 can be reduced, and one sleeve 7 is provided between the two rake blades 3 to ensure that the material can pass through the space between one sleeve 7 and the two rake blades 3.

[0036] As one implementation method, see Figure 1 The rake handle 1 is equipped with 9 rake blades 3, 4 pressure rollers 5 and 4 sleeves 7. The rake handle 1 is arranged with 2 rake blades 3 and 1 sleeve 7. The remaining 1 rake blade 3 is located at the outermost end of the rake handle 1. A pressure roller 5 is located behind the 2 rake blades 3 and 1 sleeve 7.

[0037] As one implementation method, see Figure 1 The rake bar is equipped with 8 rake blades 3, 3 pressure rollers 5 and 4 sleeves 7. The middle part of the rake bar 1 is arranged in 3 groups with 2 rake blades 3 and 1 sleeve 7. Each group has 1 pressure roller 5 behind the 2 rake blades 3 and 1 sleeve 7. The rake bar 1 is equipped with 1 rake blade 3 and 1 sleeve 7 on the side close to the main shaft 2. The remaining 1 rake blade 3 is located at the outermost end of the rake bar 1.

[0038] In order to adjust the arrangement of the rake blades 3 and the sleeves 7, both the rake blades 3 and the sleeves 7 are detachably connected to the rake rod 1, so as to achieve flexible arrangement of the rake blades 3 and the sleeves 7 on the rake rod 1.

[0039] In order to fix the rake blades 3 and the sleeves 7 on the rake arm 1, the rake arm structure also includes two limiting blocks. The two limiting blocks are located at both ends of the rake arm 1 and are used to limit the position of multiple rake blades 3 and multiple sleeves 7 in the axial direction of the rake arm 1.

[0040] As one implementation method, see Figure 2The rake blade 3 includes a rake blade sleeve 31, a rake blade connecting plate 32, and a rake blade body 33. The rake blade sleeve 31 is fixedly connected to the rake rod 1. One end of the rake blade connecting plate 32 is fixedly connected to the rake blade sleeve 31. The rake blade body 33 is fixedly connected to the other end of the rake blade connecting plate 32. The rake blade body 33 is set at an angle to the rake rod 1, and the angles formed between multiple rake blade bodies 33 and the rake rod 1 are the same. The fixed connection between the rake blade sleeve 31 and the rake rod 1 prevents the rake blade body 33 from rotating relative to the rake rod 1, ensuring effective contact between the rake blade body 33 and the drying tray 4, thereby agitating the material on the drying tray 4. The rake blade connecting plate 32 effectively connects the rake blade body 33 and the rake blade sleeve 31, facilitating processing. The rake blade connecting plate 32 also separates the rake rod 1 and the rake blade body 33 along the axial direction of the main shaft 2, allowing the material agitated by the rake blade body 33 to pass through the space between the rake blade sleeve 31 and the rake blade connecting plate 32, preventing material accumulation between the rake blade body 33 and the rake blade sleeve 31, and ensuring the normal and stable operation of the rake blade 3. The rake blade body 33, which is angled relative to the rake rod 1, can agitate the material on the drying tray 4 in the same direction, thereby transferring the material to the next drying tray 4.

[0041] As one implementation method, the rake blade sleeve 31 and the rake blade connecting plate 32 are integrally formed, which facilitates processing.

[0042] To prevent the rake blade 3 from rotating axially relative to the rake rod 1, the rake blade sleeve 31 is locked to the rake rod 1 by a locking device, thereby ensuring the stability of the relative position of the rake blade 3 relative to the rake rod 1.

[0043] In one embodiment, the rake blade body 33 is in the shape of a rectangular thin sheet.

[0044] This utility model also provides a disc dryer, which includes a main shaft 2, a drying disc 4, and multiple rake arm structures according to any of the above embodiments. The multiple rake arm structures are evenly distributed along the circumference of the main shaft 2. The multiple rake arm structures can rotate with the main shaft 2, thereby moving and crushing the material on the drying disc 4, effectively drying the high moisture content material on the drying disc 4, and improving the drying efficiency of the material.

[0045] As one implementation method, see Figure 1 There are two ways to set the rake blades 3, sleeves 7 and pressure rollers 5 on the rake arm structure, and the setting methods of any two adjacent rake arm structures are different.

[0046] In one implementation, multiple drying trays 4 are provided, and the multiple drying trays 4 are distributed at intervals along the axial direction of the main shaft 2. The material located on the upper drying tray 4 can be moved to the lower drying tray 4 by the rake arm structure for further drying treatment, thereby improving the drying effect of the material.

[0047] In order to move the material in the drying tray 4 to the next drying tray 4, the outermost rake blades 3 of the adjacent rake arm structures, which are far from the main shaft 2, are located at different radial positions along the radial direction of the main shaft 2. Thus, under the combined action of the rake blades 3 located at different radial positions, the material is delivered to the drying tray 4 below.

[0048] To ensure that all material on the drying tray 4 can be moved, multiple rake arm structures are provided. Along the same radial position of the main shaft 2, in two adjacent rake arm structures, when one rake arm structure is equipped with a sleeve 7, the other rake arm structure is equipped with a rake blade 3. That is, the sleeves 7 on two adjacent rake arm structures are not positioned at the same radial position on the main shaft 2, ensuring that all material on the drying tray 4 can be moved, preventing material below the sleeve 7 from remaining unused, and improving the drying effect.

[0049] The drying performance of the disc dryer of this invention on materials with high moisture content is shown in the table below:

[0050] Drying conditions of ternary precursors for lithium-ion batteries with different moisture contents during feeding

[0051]

[0052] The changes in the feed moisture content and discharge moisture content of the ternary precursor for lithium battery cathodes in the table above show that, under the same drying temperature and material residence time, the moisture content of high-moisture materials can be reduced to below 10% after being processed by the disc dryer, with a dewatering rate of more than 30%. This indicates that the disc dryer of this invention can effectively dry materials with high moisture content, greatly improving the range of material moisture content that can be processed.

[0053] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. This includes combining various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A rake arm structure for a disc dryer, characterized in that, include: Rake rod (1), one end of which is fixedly connected to the main shaft (2) of the disc dryer; Rake blade (3), which is fixedly mounted on the rake rod (1) and used to agitate the material on the drying tray (4) of the disc dryer; and The pressure roller (5) is fixedly connected to the rake rod (1) and is used to crush the material on the drying tray (4).

2. The rake arm structure of the disc dryer according to claim 1, characterized in that, Along the rotation direction of the main shaft (2), the pressure roller (5) is located behind the rake blade (3).

3. The rake arm structure of the disc dryer according to claim 1, characterized in that, Multiple rake blades (3) are provided, and the multiple rake blades (3) are distributed at intervals along the axial direction of the rake rod (1). Multiple pressure rollers (5) are provided, and each pressure roller (5) is corresponding to at least one rake blade (3); or One pressure roller (5) is provided, and one pressure roller (5) is provided in correspondence with multiple rake blades (3).

4. The rake arm structure of the disc dryer according to claim 1, characterized in that, The rotation axis of the pressure roller (5) intersects with and is perpendicular to the axis of the main shaft (2).

5. The rake arm structure of the disc dryer according to claim 1, characterized in that, The rake arm structure also includes a connector (6), which is used to fix the pressure roller (5) to the rake arm (1), and the pressure roller (5) is rotatably mounted on the connector (6).

6. The rake arm structure of the disc dryer according to claim 5, characterized in that, The connector (6) includes: Two connecting rods (61), one end of each connecting rod (61) being fixedly connected to the rake rod (1); and A connecting shaft (62) is provided, with both ends of the connecting shaft (62) being fixedly connected to the other ends of the two connecting rods (61), and the pressure roller (5) is rotatably mounted on the connecting shaft (62).

7. The rake arm structure of the disc dryer according to any one of claims 1-6, characterized in that, The rake arm structure also includes multiple sleeves (7), which are fixedly installed on the rake arm (1). The sleeves (7) and the adjacent rake blades (3) form a space for material to pass through.

8. The rake arm structure of the disc dryer according to any one of claims 1-6, characterized in that, The rake blade (3) includes: Rake blade sleeve (31), the rake blade sleeve (31) is fixedly connected to the rake rod (1); A rake blade connecting plate (32), one end of which is fixedly connected to the rake blade sleeve (31); and The rake blade body (33) is fixedly connected to the other end of the rake blade connecting plate (32). The rake blade body (33) is set at an angle to the rake rod (1), and the angle formed between the multiple rake blade bodies (33) and the rake rod (1) is the same.

9. A disc dryer, characterized in that, The disc dryer includes a main shaft (2), a drying disc (4), and a plurality of rake arm structures according to any one of claims 1-8, wherein the plurality of rake arm structures are evenly distributed along the circumference of the main shaft (2).

10. The disc dryer according to claim 9, characterized in that, Multiple drying trays (4) are provided, and the multiple drying trays (4) are distributed at intervals along the axial direction of the main shaft (2).

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