Stirring shaft for rake dryer

Abstract

The stirring shaft comprises a main shaft and rake rods which are distributed and connected to the main shaft in a staggered mode, at least one set of reinforcing ribs are arranged at the connecting position of the main shaft and each rake rod, each reinforcing rib comprises two reinforcing plates, and the two reinforcing plates are integrally connected with each other at a certain included angle. And three-dimensional reinforcing ribs are formed. According to the utility model, the bearable strength of the rake rod can be increased, the resistance in the operation process can be reduced, the dead angle at the joint of the main shaft and the rake rod can be reduced, and the adhesion of materials can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dry equipment technical field, especially relate to a stirring shaft for harrow type dryer. BACKGROUND

[0002] Vacuum harrow type dryer is a horizontal stirring type dryer mainly with heat conduction indirect heating. The blade of horizontal harrow type stirrer in the dryer is made of cast steel or thick-walled seamless pipe and is installed on a circular main shaft. Half of the blades are directed to the left and the other half to the right. The rotating speed of the shaft is 7-8 r / min. It is driven by a transmission motor with a speed reducer. Automatic steering is provided to change the rotating direction of the stirrer every 5-8 minutes.

[0003] However, the stability of the connection between the existing harrow rod and the main shaft is poor, and the harrow rod cannot withstand greater resistance during operation, which limits the stirring and drying capacity. In order to improve the stability of the connection, reinforcing ribs are generally provided at the connection between the harrow rod and the main shaft, but this also causes dead angles, especially for materials in paste or paste form, which are easily trapped in the dead angles and cannot be uniformly mixed with the materials inside the cylinder. The materials trapped in the corners are also difficult to clean. INVENTION CONTENTS

[0004] To solve the above problems, the utility model discloses a stirring shaft for harrow type dryer, which can not only increase the strength that the harrow rod can withstand and reduce the resistance received during operation, but also reduce the dead angle at the connection between the main shaft and the harrow rod and reduce the adhesion of the materials.

[0005] The specific technical scheme of the utility model is as follows:

[0006] A stirring shaft for harrow type dryer, comprising a main shaft and harrow rods connected to the main shaft in a staggered manner, at least one set of reinforcing ribs is provided at the connection between the main shaft and each harrow rod, and the reinforcing ribs comprise two reinforcing plates which are integrally connected at a certain angle between them to form a three-dimensional reinforcing rib.

[0007] Preferably, the reinforcing ribs have two sets which are symmetrically connected to the two sides of the harrow rod.

[0008] Preferably, the angle between the two reinforcing plates is 45°-60°.

[0009] Preferably, the reinforcing plate is a triangular plate structure.

[0010] Preferably, one side of the reinforcing plate is in an arc shape structure and cooperates with the curved contact surface of the harrow rod, and the other side is a straight edge for connecting with the straight edge of the other reinforcing plate.

[0011] Preferably, the bottom edge of the reinforcing plate has an arc-shaped structure and matches the curved contact surface of the main shaft.

[0012] Beneficial effects: This utility model discloses a stirring shaft for a rake dryer, which has the following advantages compared with the prior art:

[0013] (1) In this utility model, the reinforcing ribs at the rake teeth are optimized from a single plate to a double plate at an angle, which can reduce the resistance of the rake blade during the stirring process while ensuring the stability of the connection.

[0014] (2) This utility model can also avoid dead corners at the connection between the main shaft and the rake rod, reduce the adhesion of materials, improve the uniformity of material heating, improve the quality of dried products, and promote the uniform evaporation of moisture.

[0015] Figure 1 A schematic diagram of the existing stirring shaft structure;

[0016] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1;

[0017] Figure 3 This is a schematic diagram of the reinforcing rib structure in Embodiment 1;

[0018] In the diagram: Main shaft 1, rake bar 2, reinforcing rib 3, reinforcing plate 3-1. Detailed Implementation

[0019] The present invention will now be described with reference to the accompanying drawings. Several improvements and modifications will be made to the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention. Example 1

[0020] like Figures 2-3 As shown, a rake-type stirring shaft includes a main shaft 1 and rake rods 2 that are staggered and connected to the main shaft. At least one set of reinforcing ribs 3 are provided at the connection between the main shaft 1 and each rake rod 2. Each reinforcing rib 3 includes two reinforcing plates 3-1, which are integrally connected at a certain angle to form a three-dimensional reinforcing rib, which is connected between the main shaft 1 and the rake rods 2.

[0021] In this embodiment 1, there are two sets of reinforcing ribs 3-1, which are symmetrically connected to both sides of the rake rod 2.

[0022] To better address the issue of blind spots in the rake teeth, the included angle between the two reinforcing plates can be designed to be 45°-60°. In this embodiment 1, the included angle is preferably 60°.

[0023] In this embodiment 1, the reinforcing plate 3-1 has a triangular plate structure, and one side of the reinforcing plate 3-1 has an arc shape structure, which matches the curved contact surface of the rake rod. The other side is a straight edge, which is used to connect with the straight side of another reinforcing plate. The bottom edge of the reinforcing plate 3-1 has an arc shape structure, which matches the curved contact surface of the main shaft.

[0024] like Figure 1 The image shows a traditional rake-type mixing shaft. Although it uses vertical reinforcing plates (two-dimensional) to strengthen the connection between the rake rod and the main shaft, it also introduces many dead corners. On the one hand, this causes slurry or paste-like materials to easily stick to these dead corners, making it impossible to mix evenly with the materials inside the cylinder. On the other hand, it also leads to incomplete cleaning, difficult cleaning, and time-consuming processes, severely impacting equipment utilization efficiency. Furthermore, during the processing and welding of traditional reinforcing ribs, surface treatments such as polishing are not possible after welding at the dead corners.

[0025] In Example 1, by improving the existing reinforcing rib design to a double-plate three-dimensional reinforcing rib with an included angle, the dead angle problem of the rake bar is not only completely eliminated, but product quality is also significantly improved while ensuring structural strength. Furthermore, this design simplifies the equipment cleaning process, thereby effectively improving equipment efficiency. Simultaneously, due to the reduction in motion resistance, the load on the reducer and motor is also reduced, further extending the equipment's service life.

[0026] In this embodiment 1, the advantages of three-dimensional sheet metal blanking are utilized to enable precise machining of the irregular arcs that form the contact surfaces of the reinforcing plate, the main shaft, and the rake rod, thereby improving the machining accuracy of the main shaft.

[0027] The above is merely a description of the present utility model and represents a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the present utility model, and these improvements and modifications should also be considered within the scope of protection of the present utility model.

Claims

1. A stirring shaft for a rake dryer, characterized in that, It includes a main shaft and rake rods that are staggered and connected to the main shaft. At least one set of reinforcing ribs is provided at the connection between the main shaft and each rake rod. Each reinforcing rib includes two reinforcing plates that are integrally connected at a certain angle to form a three-dimensional reinforcing rib.

2. The stirring shaft for a rake dryer according to claim 1, characterized in that, There are two sets of reinforcing ribs, which are symmetrically connected to both sides of the rake handle.

3. The stirring shaft for a rake dryer according to claim 1, characterized in that, The included angle between the two reinforcing plates is 45°-60°.

4. The stirring shaft for a rake dryer according to claim 1, characterized in that, The reinforcing plate has a triangular plate structure.

5. The stirring shaft for a rake dryer according to claim 1 or 4, characterized in that, One side of the reinforcing plate has an arc-shaped structure and matches the curved contact surface of the rake rod, while the other side is a straight edge for connecting with the straight side of another reinforcing plate.

6. The stirring shaft for a rake dryer according to claim 1 or 4, characterized in that, The bottom edge of the reinforcing plate has an arc-shaped structure and matches the curved contact surface of the main shaft.

Images