An adjustable rake dryer tine

Abstract

The utility model relates to the harrow type drying machine field especially relates to adjustable harrow type drying machine harrow tooth, the middle part of support arm is rotationally installed with mounting disc through the installation groove, the upper part of mounting disc projects installation groove and is connected with the vane, the outside one side of mounting disc is annular and equally spaced and is opened with a plurality of limiting grooves, and the other side upper part is opened with arc limiting slot, and the middle part of arc limiting slot is annular and equally spaced and is opened with a plurality of limiting holes. In the utility model, the harrow tooth includes support arm, vane and other components, the bottom of vane is rotationally connected with support arm through mounting disc, the inside of support arm is equipped with arc spring piece and is equally spaced with the limiting groove of mounting disc outer wall cooperation, realizes the multi-position equidistance rotation adjustment operation of harrow tooth, and the locking bolt limiting mechanism set up on the other side of support arm can effectively with the limiting hole of mounting disc on opening and is inserted and is locked, ensures the stability after angle adjustment, effectively realizes harrow tooth angle adjustment, guarantees work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rake dryer technology, and in particular to an adjustable rake tooth for a rake dryer. Background Technology

[0002] A rake dryer is a drying device for materials in the form of slurry, paste, granules, powder, and fibrous materials. Its core structure includes a horizontal cylindrical drying chamber, a stirring shaft equipped with rake teeth, a jacketed heating device, and a vacuum system. The working principle involves introducing a heat carrier such as steam, hot water, or heat transfer oil through the jacket and hollow rake tooth shaft to heat the material via conduction. Simultaneously, the rake teeth continuously rotate and stir the material, ensuring uniform heating. After the moisture evaporates, it is extracted by a vacuum pump, thus achieving drying.

[0003] Among them, the rake teeth are the key working components of the rake dryer, realizing the functions of stirring, mixing, crushing, and pushing materials. In some traditional rake dryers, the angle of the rake teeth (that is, the inclination angle of the rake tooth plane relative to the main shaft axis or the material movement direction) is usually fixed. Traditional rake teeth are often directly welded or bolted to the main shaft at a specific angle. However, according to the actual production situation, the fixed angle rake teeth cannot meet the changing material characteristics, resulting in insufficient stirring force, poor crushing efficiency, slow material pushing efficiency and other process problems, and the working efficiency cannot be guaranteed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an adjustable rake tooth for a rake dryer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adjustable rake dryer rake tooth includes a support arm, a mounting plate is rotatably mounted on the middle part of the support arm through a mounting groove, the upper part of the mounting plate extends out of the mounting groove and is connected to blades, a plurality of limiting grooves are equidistantly arranged in an annular shape on one side of the outer side of the mounting plate, and an arc-shaped limiting groove is provided on the upper part of the other side, and a plurality of limiting holes are equidistantly arranged in an annular shape in the middle of the arc-shaped limiting groove.

[0007] The upper side of the support arm is provided with a threaded groove, and the bottom of the threaded groove is connected to a limiting groove. The limiting groove extends downward and is connected to the mounting groove. A locking bolt is installed in the limiting groove by a limiting block. The top of the locking bolt extends out of the limiting groove and is screwed to the threaded groove through a threaded seat, and the bottom extends into the mounting groove and is inserted into the corresponding limiting hole on the mounting plate.

[0008] Furthermore, in a preferred configuration, the position of each limiting groove is mirror-symmetrical to the position of each limiting hole on the horizontal projection plane.

[0009] Furthermore, in a preferred configuration, the support arm is mounted on the main shaft.

[0010] Furthermore, a preferred structure is that both sides of each of the limiting grooves are rounded.

[0011] Furthermore, in a preferred configuration, a spring is installed between the limiting groove and the limiting block.

[0012] In addition, a preferred structure is that the bottom of the locking bolt is a conical head with a structure that is wider at the top and narrower at the bottom. When the locking bolt is inserted into any limiting hole, the outer wall of the conical head is pressed against the inner wall of the limiting hole.

[0013] In addition, a preferred structure is that a groove is provided on one side of the inner wall of the mounting slot, and an arc-shaped spring plate is installed in the groove. The tip of the arc-shaped spring plate is engaged with a limiting groove provided on the outer wall of the mounting plate.

[0014] The beneficial effects of this utility model are as follows:

[0015] In this utility model, the rake teeth are composed of components such as support arms and blades. The bottom of the blades is rotatably connected to the support arm via a mounting plate. The support arm has an arc-shaped spring plate inside that cooperates with the limiting grooves evenly distributed on the outer wall of the mounting plate to realize the multi-position equidistant rotation adjustment of the rake teeth. At the same time, the locking bolt limiting mechanism set on the other side of the support arm can effectively be inserted and locked with the limiting hole opened on the mounting plate to ensure the stability after the angle adjustment. This effectively realizes the rake tooth angle adjustment operation, meets processing requirements, and ensures work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the rake teeth of an adjustable rake dryer proposed in this utility model.

[0017] Figure 2 This is a cross-sectional view of the internal structure of the support arm proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the support arm proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the structure at point A proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of the external structure of the mounting disk proposed in this utility model;

[0021] Figure 6 This is a schematic diagram of the connection structure between the mounting plate and the mounting slot proposed in this utility model;

[0022] Figure 7 This is a schematic diagram of the structure at point B proposed in this utility model;

[0023] Figure 8 This is a schematic diagram of the external structure of the locking bolt proposed in this utility model.

[0024] In the diagram: 1. Main shaft; 2. Support arm; 21. Blade; 3. Mounting plate; 31. Arc-shaped limiting groove; 311. Limiting hole; 32. Limiting groove; 33. Rounded corner; 4. Mounting groove; 5. Locking bolt; 51. Threaded seat; 52. Limiting block; 6. Spring; 7. Limiting groove; 8. Threaded groove; 9. Arc-shaped spring plate; 10. Conical head. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-8 An adjustable rake dryer rake tooth includes a support arm 2. A mounting plate 3 is rotatably mounted on the middle part of the support arm 2 via a mounting groove 4. The upper part of the mounting plate 3 extends out of the mounting groove 4 and is connected to a blade 21. The middle part of the blade 21 is rotatably connected to the mounting groove 4 via a bearing to ensure assembly stability.

[0027] The outer side of the mounting plate 3 has multiple equidistant limiting grooves 32 arranged in a ring, and the upper part of the other side has an arc-shaped limiting groove 31. The middle part of the arc-shaped limiting groove 31 has multiple equidistant limiting holes 311 arranged in a ring.

[0028] Adjacent limiting grooves 32 are equally distributed at an angle of 30°;

[0029] The adjacent limiting holes 311 are equally distributed at an angle of 30°.

[0030] A threaded groove 8 is provided on the upper side of the support arm 2. The bottom of the threaded groove 8 is connected to a limiting groove 7. The limiting groove 7 extends downward and is connected to the mounting groove 4. A locking bolt 5 is installed in the limiting groove 7 by a limiting block 52. The top of the locking bolt 5 extends out of the limiting groove 7 and is screwed to the threaded groove 8 through a threaded seat 51. The bottom extends into the mounting groove 4 and is inserted into the corresponding limiting hole 311 on the mounting plate 3.

[0031] The position of each limiting groove 32 is mirror-symmetrical to the position of each limiting hole 311 on the horizontal projection plane, that is, the position of the limiting groove 32 and the position of the limiting hole 311 are symmetrically arranged on the mounting plate 3.

[0032] Support arm 2 is mounted on spindle 1;

[0033] Main shaft 1, also known as hollow rake tooth shaft, is a standard accessory in rake dryers, used to connect the rake teeth. Its detailed structure will not be explained further.

[0034] Each limiting groove 32 has rounded corners 33 on both sides, which provide a smooth guiding effect when in contact with the arc-shaped spring sheet 9.

[0035] A spring 6 is installed between the limiting groove 7 and the limiting block 52. The spring 6 is in contact with the limiting groove 7 and the limiting block 52 by compression, but no rigid connection is formed.

[0036] The limiting block 52 achieves a single vertical movement through the limiting groove 7, and the spring 6 deforms as the limiting block 52 moves.

[0037] The bottom of the locking bolt 5 is a tapered head 10, which is wider at the top and narrower at the bottom. When the locking bolt 5 is inserted into any of the limiting holes 311, the outer wall of the tapered head 10 is pressed against the inner wall of the limiting hole 311, thereby producing an interference fit.

[0038] A groove is provided on one side of the inner wall of the mounting slot 4. An arc-shaped spring plate 9 is installed in the groove. The tip of the arc-shaped spring plate 9 is engaged with the limiting groove 32 opened on the outer wall of the mounting plate 3. The concave (limiting groove 32) and convex (arc-shaped spring plate 9) structure ensures the tightness of the connection between the two.

[0039] In this embodiment, during the process of adjusting the angle of the rake teeth, the locking bolt 5 on the support arm 2 is loosened, so that the threaded seat 51 at the bottom of the locking bolt 5 disengages from the threaded groove 8 on the upper part of the support arm 2. After the thread disengages, the locking bolt 5 can be pulled upward. After moving upward, the bottom of the locking bolt 5 will disengage from the limiting hole 311 opened on the upper part of the mounting plate 3. At this time, the mounting plate 3 can rotate freely.

[0040] When the mounting plate 3 rotates, the limiting groove 32 on the outer side of the mounting plate 3 will exert a squeezing force on the arc-shaped spring plate 9 installed inside the support arm 2 in the same direction as the rotation. After being squeezed, the arc-shaped spring plate 9 will deform and indent until the arc-shaped spring plate 9 is removed from the limiting groove 32 and contacts the outer wall of the mounting plate 3 itself. At this time, the mounting plate 3 is not subject to the limiting constraint of the arc-shaped spring plate 9.

[0041] As the mounting plate 3 continues to rotate, the arc-shaped spring plate 9 will disengage from the corresponding limiting groove 32 and enter the next adjacent limiting groove 32. The arc-shaped spring plate 9 and the limiting groove 32 are aligned and the arc-shaped spring plate 9 is no longer squeezed by the outer wall of the mounting plate 3. It re-enters the limiting groove 32 through its own deformation ability, thus completing the rotation adjustment operation of a fixed angle (30°).

[0042] At the same time, since the limiting groove 32 and the limiting hole 311 are symmetrically arranged, the rotational displacement of the limiting groove 32 and the limiting hole 311 is equal at any rotation angle. Therefore, the limiting hole 311 after rotation will be exactly coaxial with the position of the locking bolt 5. At this time, the locking bolt 5 is released, and the locking bolt 5 is driven to return to its original position under the action of the spring 6, so that the tapered head 10 at the bottom of the locking bolt 5 is inserted into the corresponding limiting hole 311, thus completing the insertion and limiting.

[0043] At this point, after the insertion is completed, the locking bolt 5 is rotated again to make the threaded seat 51 and the threaded groove 8 form a threaded connection. Under the action of the thread rotation, the locking bolt 5 moves downward and drives the tapered head 10 to be further inserted into the limiting hole 311 to form an interference fit, thereby ensuring the limiting stability of the mounting plate 3.

[0044] Among them, the mounting plate 3 and the blade 21 are mechanically and tightly assembled through the mounting groove 4, and their rotation function is realized through the bearing components. This is a conventional assembly method in this field, which can ensure operational stability.

[0045] It should be noted that, after the angle is adjusted, the rake teeth can be adjusted to a larger forward tilt angle (more perpendicular to the material flow direction) when facing high viscosity and easily agglomerated materials, so as to provide stronger mixing, shearing and crushing forces and effectively break up agglomerates.

[0046] When dealing with materials with good flowability and low viscosity, adjusting the forward tilt angle of the rake teeth to a smaller angle (more parallel to the material flow direction) can reduce excessive stirring and shearing, accelerate the material propulsion speed, and prevent overheating decomposition or excessive crushing due to excessive residence time.

[0047] The more specific drying process and principles are common knowledge to those skilled in the art and will not be explained further.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adjustable rake tooth for a rake dryer, comprising a support arm (2), characterized in that, The middle part of the support arm (2) is rotatably mounted with a mounting plate (3) through a mounting groove (4). The upper part of the mounting plate (3) extends out of the mounting groove (4) and is connected to a blade (21). A plurality of limiting grooves (32) are equidistantly arranged in an annular shape on one side of the mounting plate (3), and an arc-shaped limiting groove (31) is opened on the upper part of the other side. A plurality of limiting holes (311) are equidistantly arranged in an annular shape in the middle part of the arc-shaped limiting groove (31). The upper side of the support arm (2) is provided with a threaded groove (8). The bottom of the threaded groove (8) is connected to a limiting groove (7). The limiting groove (7) extends downward and is connected to the mounting groove (4). A locking bolt (5) is installed in the limiting groove (7) by a limiting block (52). The top of the locking bolt (5) extends out of the limiting groove (7) and is screwed to the threaded groove (8) through a threaded seat (51). The bottom extends into the mounting groove (4) and is inserted into the corresponding limiting hole (311) on the mounting plate (3).

2. The adjustable rake teeth of a rake dryer according to claim 1, characterized in that, The position of each of the limiting grooves (32) is mirror-symmetrical to the position of each limiting hole (311) on the horizontal projection plane.

3. The adjustable rake teeth of a rake dryer according to claim 1, characterized in that, The support arm (2) is mounted on the main shaft (1).

4. The adjustable rake teeth of a rake dryer according to claim 1, characterized in that, Each of the limiting grooves (32) has rounded corners (33) on both sides.

5. The adjustable rake teeth of a rake dryer according to claim 1, characterized in that, A spring (6) is installed between the limiting groove (7) and the limiting block (52).

6. The adjustable rake teeth of a rake dryer according to claim 1, characterized in that, The bottom of the locking bolt (5) is set as a conical head (10). The conical head (10) has a structure that is wider at the top and narrower at the bottom. When the locking bolt (5) is inserted into any limiting hole (311), the outer wall of the conical head (10) is pressed into contact with the inner wall of the limiting hole (311).

7. The adjustable rake teeth of a rake dryer according to claim 1, characterized in that, The inner wall of the mounting groove (4) is provided with a groove, and an arc-shaped spring plate (9) is installed in the groove. The tip of the arc-shaped spring plate (9) is engaged with the limiting groove (32) on the outer wall of the mounting plate (3).

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