Uniformly mixed vacuum rake dryer

Abstract

The utility model relates to drying -machine technical field, concretely is a kind of uniform mixing vacuum harrow type drying -machine, first motor is equipped in the machine case, the inside of drying cylinder is equipped with stirring shaft, the periphery of stirring shaft is equipped with a plurality of stirring paddle, and the output end of first motor is equipped with the transmission shaft connected with the front end of stirring shaft, the center of the rear end of drying cylinder body is equipped with circular bottom plate, annular plate is rotatably arranged in the outer ring of circular bottom plate, the rear end of stirring shaft is equipped with the support rod connected with annular plate, the linkage rotation of stirring shaft and annular plate forms the composite flow field of axial and peripheral, cooperation the shearing crushing of two sides broken axle, realize " mixing-crushing-drying " trinity operation. Compared with traditional single-shaft stirring drying machine, material mixing uniformity is higher, and the agglomeration rate is reduced, especially suitable for paste, granular mixture homogenization drying.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, specifically to a vacuum rake dryer for uniform material mixing. Background Technology

[0002] The rake vacuum dryer is an enhanced and improved design based on the technology of rake vacuum dryers both domestically and internationally, specifically for various slurry, paste, granular, powder, and fibrous materials. Continuous improvements and targeted, adaptive modifications have resulted in numerous variants of the rake vacuum dryer.

[0003] When using existing vacuum rake dryers, materials tend to clump together in a vacuum environment. These clumps accumulate near the inner wall of the drum, and the stirring structure cannot effectively break up the clumps formed by the sticky materials, resulting in uneven drying and affecting the quality and efficiency of drying. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a vacuum rake dryer for uniform material mixing.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vacuum rake dryer for uniform mixing, comprising a base, a drying cylinder, and a casing. The upper end of the drying cylinder is provided with a feed pipe, and the lower end of the drying cylinder is provided with a discharge pipe. The drying cylinder and the casing are both fixed above the base. A first motor is provided inside the casing. A stirring shaft is provided inside the drying cylinder. Multiple stirring blades are provided around the stirring shaft. The output end of the first motor is provided with a drive shaft connected to the front end of the stirring shaft. A circular bottom plate is provided at the center of the rear end of the drying cylinder. An annular plate is rotatably provided around the outer ring of the circular bottom plate. A support rod connected to the annular plate is provided at the rear end of the stirring shaft.

[0008] The annular plate is equipped with multiple second motors. The output end of the second motor is equipped with a crushing shaft that is inserted into the drying cylinder. The crushing shaft is located on both sides of the stirring shaft and is equipped with multiple crushing blades.

[0009] To improve the stability of the annular plate during use, the present invention includes the following improvements: the annular plate is rotatably mounted at the rear end of the base via a bearing; multiple support rods connecting the annular plate are symmetrically arranged at the rear end of the stirring shaft; and multiple bent rods are provided at the rear end of the drying cylinder, with the two ends of the bent rods respectively connected to the rear end of the drying cylinder and the circular bottom plate.

[0010] Furthermore, an improvement of this utility model is that both the first motor and the second motor are servo motors.

[0011] Furthermore, an improvement of this invention is that the multiple crushing shafts are of the same size, and the multiple crushing blades are of the same size.

[0012] By limiting the circular base plate with a bent rod, the annular plate can rotate stably between the circular base plate and the drying cylinder. The first motor is started, causing the stirring shaft to rotate with the stirring blades inside the drying cylinder, which uniformly and slowly stirs the material inside the drying cylinder. The second motor is started, causing the crushing shaft to quickly crush the lumps of material accumulated on the inner wall of the drying cylinder with the crushing blades. As the annular plate rotates, the position of the crushing shaft can be changed, which can crush the lumps of material inside the drying cylinder more thoroughly.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a vacuum rake dryer for uniform mixing, which has the following beneficial effects:

[0015] The coordinated rotation of the stirring shaft and the annular plate creates a composite flow field in both the axial and circumferential directions. Combined with the shearing and crushing action of the crushing shafts on both sides, this achieves a three-in-one operation of "mixing-crushing-drying". Compared with traditional single-shaft stirring dryers, the material mixing uniformity is higher and the agglomeration rate is reduced, making it particularly suitable for the homogenization and drying of paste-like and granular mixtures. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 3 This utility model Figure 1 The main view;

[0019] Figure 4 This is a schematic diagram of the installation structure of the crusher shaft in this utility model;

[0020] Figure 5 This utility model Figure 4 Side view;

[0021] In the diagram: 1. Base; 2. Drying cylinder; 3. Casing; 4. Drive shaft; 5. Stirring shaft; 6. Support rod; 7. Annular plate; 8. Stirring blade; 9. Second motor; 10. Crushing shaft; 11. Crushing blade; 12. Bent rod; 13. Discharge pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 This utility model discloses a vacuum rake dryer for uniform mixing. The vacuum rake dryer for uniform mixing includes a base 1, a drying cylinder 2, and a casing 3. The upper end of the drying cylinder 2 is provided with a feed pipe, and the lower end of the drying cylinder 2 is provided with a discharge pipe 13. The drying cylinder 2 and the casing 3 are both fixed above the base 1. A first motor is provided inside the casing 3. A stirring shaft 5 is provided inside the drying cylinder 2. Multiple stirring blades 8 are provided around the stirring shaft 5. The output end of the first motor is provided with a transmission shaft 4 connected to the front end of the stirring shaft 5. A circular bottom plate is provided at the center of the rear end of the drying cylinder 2. An annular plate 7 is rotatably provided around the outer ring of the circular bottom plate. A support rod 6 connected to the annular plate 7 is provided at the rear end of the stirring shaft 5.

[0024] The annular plate 7 is provided with multiple second motors 9. The output end of the second motor 9 is provided with a crushing shaft 10 inserted into the drying cylinder 2. The crushing shaft 10 is located on both sides of the stirring shaft 5. Multiple crushing blades 11 are provided on the crushing shaft 10.

[0025] The multiple crushing shafts 10 are of the same size, and the multiple crushing blades 11 are of the same size.

[0026] Equipment initialization and material loading:

[0027] The base 1 is fixed to the working surface, and the drying cylinder 2 and the machine housing 3 are vertically installed above the base 1. The feed pipe at the upper end of the drying cylinder 2 is connected to the material to be dried, and the material falls into the cylinder through the feed pipe. The first motor inside the machine housing 3 is connected to the front stirring shaft 5 of the drying cylinder 2 through the transmission shaft 4. The annular plate 7 on the outer ring of the circular bottom plate at the rear end of the cylinder is rotatably connected to the base 1 through the bearing, and the rear end of the stirring shaft 5 is fixed to the annular plate 7 through the support rod 6.

[0028] Main mixing system startup:

[0029] The first motor (servo motor) is started, driving the stirring shaft 5 to rotate. The circumferential stirring blades 8 perform preliminary mixing and agitation of the material inside the cylinder. The rear support rod 6 of the stirring shaft 5 synchronously drives the annular plate 7 to rotate around the circular bottom plate, so that the main stirring circulation flow field is formed inside the drying cylinder 2. The material moves along the axial and radial directions of the cylinder under the push of the blades, realizing basic mixing.

[0030] Collaborative operation of crushing system:

[0031] The second motor 9 (servo motor) on the annular plate 7 is started, and the crushing shaft 10 drives the crushing blades 11 to rotate at high speed. The crushing shaft 10 is distributed on both sides of the stirring shaft 5, and its rotation direction forms a reverse shear force field with the stirring shaft 5. The crushing blades 11 impact and crush the agglomerated material, and at the same time cooperate with the stirring blades 8 to shear large particles into uniform fine materials, avoiding material agglomeration during the drying process.

[0032] Vacuum drying and mixing in conjunction:

[0033] The drying cylinder 2 is connected to a vacuum system, creating a negative pressure environment inside the cylinder to lower the boiling point of the material and accelerate drying. The stirring shaft 5 and the crushing shaft 10 operate continuously. The stirring blades 8 lift the material to form a material curtain, expanding the evaporation area; the crushing blades 11 simultaneously crush any hard lumps that may form during the drying process, ensuring uniform evaporation of moisture from the material. When the annular plate 7 rotates, the bent rod 12 drives the airflow to form a vortex inside the cylinder, enhancing heat exchange efficiency.

[0034] Discharge and cleaning:

[0035] When the material reaches the set dryness value, the first motor and the second motor 9 are turned off, and the valve on the discharge pipe 13 at the lower end of the drying cylinder 2 is opened, allowing the material to be discharged under gravity. After drying, a cleaning medium can be introduced through the feed pipe, and the stirring system and crushing system will operate in conjunction to achieve automatic cleaning inside the cylinder.

[0036] The rear end of the base 1 is provided with an annular plate 7 rotatably mounted via a bearing. The rear end of the stirring shaft 5 is symmetrically provided with multiple support rods 6 connecting the annular plate 7. The rear end of the drying cylinder 2 is provided with multiple bent rods 12, and the two ends of the bent rods 12 are respectively connected to the rear end of the drying cylinder 2 and the circular bottom plate.

[0037] The annular plate 7 is rotatably connected to the base 1 via a bearing, and is supported by the bent rod 12 to ensure stability during high-speed operation, with a vibration amplitude ≤0.1mm.

[0038] The combination of multiple crushing shafts 10 and stirring blades 8 can be adapted to different material characteristics by adjusting the rotation speed and direction. For mixtures with large particle size differences, the crushing blades 11 can shear large particles into uniform fine materials, and together with the stirring blades 8, achieve particle size uniformity. For sticky materials that are prone to agglomeration, the reverse shear force field can effectively prevent agglomeration and ensure the dispersibility of the material after drying.

[0039] Both the first motor and the second motor 9 are servo motors.

[0040] The servo motor is linked with the PLC control system, which can preset multiple drying programs and automatically adjust the stirring speed, crushing intensity and vacuum degree.

[0041] Model of the first motor (main stirring motor): Siemens V90 servo motor (1FL6034-1AC61-0AA1);

[0042] Specifications: Rated power: 7.5kW;

[0043] Rated speed: 1500 r / min;

[0044] Control accuracy: ±0.1 r / min;

[0045] Second motor 9 (crushing motor) model: Panasonic MINASA6 servo motor (MSMD082G1U);

[0046] Parameters: Rated power: 1.5kW (single unit);

[0047] Rated speed: 3000 r / min;

[0048] Torque: 4.77 N·m;

[0049] Quantity: Two units (symmetrically distributed on both sides of stirring shaft 5);

[0050] Stirring shaft 5 material: 316L stainless steel (GB / T24511-2017);

[0051] Parameters: Diameter: φ80mm;

[0052] Length: Matched according to cylinder dimensions;

[0053] The structure of the stirring blade 8 is a rake-type blade;

[0054] Crusher shaft 10 material: 9Cr18Mo stainless steel (wear-resistant and corrosion-resistant);

[0055] The structure of the 11-blade breaker is a serrated shear blade.

[0056] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A vacuum rake dryer for homogenizing mixtures, comprising a base (1), a drying cylinder (2) and a casing (3), characterized in that: The upper end of the drying cylinder (2) is provided with a feed pipe, and the lower end of the drying cylinder (2) is provided with a discharge pipe (13). The drying cylinder (2) and the machine box (3) are both fixed above the base (1). The machine box (3) is provided with a first motor. The drying cylinder (2) is provided with a stirring shaft (5). Multiple stirring blades (8) are provided around the stirring shaft (5). The output end of the first motor is provided with a transmission shaft (4) connected to the front end of the stirring shaft (5). A circular bottom plate is provided at the center of the rear end of the drying cylinder (2). An annular plate (7) is rotatably provided on the outer ring of the circular bottom plate. A support rod (6) connected to the annular plate (7) is provided at the rear end of the stirring shaft (5). The annular plate (7) is provided with multiple second motors (9), and the output end of the second motors (9) is provided with a crushing shaft (10) inserted into the drying cylinder (2). The crushing shaft (10) is located on both sides of the stirring shaft (5), and multiple crushing blades (11) are provided on the crushing shaft (10).

2. The vacuum rake dryer for uniform mixing according to claim 1, characterized in that: The rear end of the base (1) is rotatably mounted with an annular plate (7) via a bearing.

3. The vacuum rake dryer for uniform mixing according to claim 2, characterized in that: Multiple support rods (6) connecting the annular plate (7) are symmetrically arranged at the rear end of the stirring shaft (5).

4. The vacuum rake dryer for uniform mixing according to claim 3, characterized in that: Both the first motor and the second motor (9) are servo motors.

5. The vacuum rake dryer for uniform mixing according to claim 4, characterized in that: The rear end of the drying cylinder (2) is provided with multiple bent rods (12), and the two ends of the bent rods (12) are respectively connected to the rear end of the drying cylinder (2) and the circular bottom plate.

6. The vacuum rake dryer for uniform mixing according to claim 5, characterized in that: The multiple crushing shafts (10) are of the same size, and the multiple crushing blades (11) are of the same size.

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