A stirring shaft and a vertical coating kettle thereof

Abstract

The utility model relates to a kind of stirring shaft and its vertical coating kettle in the technical field of coating kettle, including shaft and several piece stirring vane, stirring vane is "sickle" structure, and several stirring vanes are sequentially arranged and distributed in linear helical structure sequentially and set in the lateral wall of shaft, stirring vane includes blade part and stem part, blade part is connected in one end of stem part, the other end of stem part is fixedly connected with shaft, blade part extends to the periphery of shaft by stem part, the lateral wall of shaft is additionally provided with several piece cutting plate, cutting plate is arc structure, when stirring shaft rotates, agglomerated powder can form inside and outside cutting stirring area between stirring vane and cutting plate, powder particles in agglomerated powder can be pounded out, improve the fusion between powder and binder, so that powder can be repeatedly bonded, agglomerate becomes large, reduce powder non-fusion particle, improve equipment granulation quality.

Description

Technical Field

[0001] This utility model relates to the field of coating reactor technology, and in particular to a stirring shaft and its vertical coating reactor. Background Technology

[0002] The coating tank in continuous granulation equipment is a commonly used industrial device, mainly used to form granules from powdered or granular raw materials through physical or chemical processes. Its working principle involves gradually heating the raw materials and mixing them with additives using mechanical and thermal forces to form a mixture with a certain moisture content. Then, the mixture is continuously propelled into the granulation chamber by rotation or vibration, undergoing processes such as compression, shaping, and solidification to ultimately form the desired granules.

[0003] The existing continuous granulation production method involves loading powder into a coating vessel, adding it to the surface of the vessel to make the powder boil (fluidize), then adding a mist binder. Under the protection of a nitrogen atmosphere, the powder mixed with additives is heated and stirred. During the boiling process, the surface tension of the liquid material increases, and the particles agglomerate and stick together to form the particles required by the process. Hot air is then introduced to dry the material, which is then transported to the granulation and drying reactor for further processing.

[0004] However, existing coating reactors are all horizontally positioned, similar to cooling reactors, and the powder requires prolonged stirring inside the reactor to achieve thorough and uniform mixing. Consequently, a significant number of powder particles remain in the agglomerated powder. Therefore, there is an urgent need to develop a vertical rotary continuous granulation equipment to meet practical application requirements. Utility Model Content

[0005] The purpose of this invention is to provide a stirring shaft and its vertical coating vessel to solve the above-mentioned defects.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A stirring shaft includes a shaft and several stirring blades. The stirring blades have a sickle-shaped structure. The several stirring blades are arranged in a linear spiral structure on the side wall of the shaft. Each stirring blade includes a blade part and a rod part. The blade part is tumblingly connected to one end of the rod part, and the other end of the rod part is fixedly connected to the shaft. The blade part extends to the periphery of the shaft through the rod part. The side wall of the shaft is also provided with several cutting plates. The cutting plates have an arc-shaped structure, and the several cutting plates are arranged in a linear spiral structure on the side wall of the shaft.

[0008] As a further embodiment of the above description, the side wall of the shaft is provided with several push plates. The push plates are vertical structures that extend to one side of the blade section. One end of the push plate is fixedly connected to the shaft, and the other end of the push plate is fixedly connected to the middle of the blade section.

[0009] A vertical coating vessel includes an outer shell, an inner liner, and the aforementioned stirring shaft. The outer shell has an open structure at both the top and bottom. The inner liner is disposed inside the outer shell, and both ends of the inner liner pass through the top and bottom of the outer shell, respectively. The inner liner has a cylindrical hollow structure. The stirring shaft is inserted into the inner liner. The top of the inner liner is provided with a support plate and a drive mechanism. The stirring shaft is rotatably disposed inside the inner liner through the drive mechanism.

[0010] As a further embodiment of the above description, the support plate is provided with a mounting flange in the middle, and the top end of the stirring shaft is rotatably mounted inside the mounting flange via a bearing. A feeding pipe is provided on one side of the support plate, and one end of the feeding pipe can extend to the top of the inner liner for conductive connection.

[0011] As a further embodiment of the above description, the drive mechanism includes a motor and a reducer. The output shaft of the motor is connected to the reducer. The top surface of the reducer is provided with a rotatable drive gear, and the top surface of the stirring shaft is provided with a driven gear. The drive gear and the driven gear mesh and transmit power.

[0012] As a further embodiment of the above description, the bottom of the inner liner is provided with a conical section, and the bottom of the stirring shaft is provided with scrapers that extend obliquely to both sides, with the scrapers abutting against the side walls of the conical section.

[0013] As a further embodiment of the above description, a heat insulation layer is provided between the outer shell and the inner liner for filling. The side of the heat insulation layer near the inner liner has an outwardly recessed heat source cavity, and the heating element is located inside the heat source cavity to heat the inner liner.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by adopting a "sickle" shaped stirring blade, the blade extends to the outer periphery of the shaft through the rod body. At the same time, the side wall of the shaft is also provided with several cutting plates with an arc-shaped structure. When the stirring shaft rotates, the agglomerated powder can form an inner and outer ring cutting and stirring zone between the stirring blade and the cutting plate, which can crush the powder particles in the agglomerated powder, improve the fusion between the powder and the binder, and make the powder repeatedly bonded, agglomerated and enlarged, reduce the number of unfused powder particles, and improve the granulation quality of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a stirring shaft as described in this embodiment;

[0016] Figure 2This is a front view schematic diagram of a vertical coating reactor as described in this embodiment;

[0017] Figure 3 This is a cross-sectional view of a vertical coating reactor as described in this embodiment;

[0018] Figure 4 This is a schematic diagram of the internal structure of a vertical coating reactor as described in this embodiment;

[0019] Figure 5 for Figure 4 A magnified schematic diagram of the structure of part A in the diagram;

[0020] In the diagram: 1-outer shell, 2-inner liner, 21-stirring cavity, 3-stirring shaft, 31-shaft, 32-stirring blade, 321-blade section, 322-rod section, 33-push plate, 34-cutting plate, 35-scraper, 4-cone section, 5-drive mechanism, 51-motor, 52-reducer, 53-drive gear, 54-driven gear, 6-support plate, 61-mounting flange, 62-feeding pipe, 7-insulation layer, 71-heat source cavity. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] For this embodiment, please refer to Figures 1-5 The specific implementation of the stirring shaft 3 includes a shaft 31 and several stirring blades 32. The stirring blades 32 have a sickle-shaped structure. The several stirring blades 32 are arranged in a linear spiral structure on the side wall of the shaft 31. The stirring blades 32 include a blade part 321 and a rod part 322. The blade part 321 is tumbled to one end of the rod part 322, and the other end of the rod part 322 is fixedly connected to the shaft 31. The blade part 321 extends to the periphery of the shaft 31 through the rod part 322. The side wall of the shaft 31 is also provided with several cutting plates 34. The cutting plates 34 have an arc-shaped structure, and the several cutting plates 34 are arranged in a linear spiral structure on the side wall of the shaft 31.

[0023] As a further embodiment, the side wall of the shaft 31 is provided with several push plates 33. The push plates 33 are vertical structures that extend to one side of the blade section 321. One end of the push plate 33 is fixedly connected to the shaft 31, and the other end of the push plate 33 is fixedly connected to the middle of the blade section 321.

[0024] By employing a sickle-shaped mixing blade 32, the blade portion 321 extends to the periphery of the shaft 31 via the rod portion 322. Simultaneously, the side wall of the shaft 31 is also provided with several cutting plates 34, which have an arc-shaped structure. When the mixing shaft 3 rotates, the agglomerated powder can form an inner and outer ring cutting and mixing zone between the mixing blade 32 and the cutting plates 34. This can break up the powder particles in the agglomerated powder, improve the fusion between the powder and the binder, allow the powder to be repeatedly bonded, agglomerated and enlarged, reduce unfused powder particles, and improve the granulation quality of the equipment.

[0025] Specifically, such as Figure 2-5 As shown, a vertical coating vessel includes an outer shell 1, an inner liner 2, and the aforementioned stirring shaft 3. The outer shell 1 has an open structure at both the top and bottom. The inner liner 2 is disposed inside the outer shell 1, and both ends of the inner liner 2 penetrate through the top and bottom of the outer shell 1, respectively. The inner liner 2 has a cylindrical hollow structure. The stirring shaft 3 is inserted into the inner liner 2. The top of the inner liner 2 is provided with a support plate 6 and a drive mechanism 5. The stirring shaft 3 is rotatably disposed inside the inner liner 2 through the drive mechanism 5.

[0026] In the above description, as a further embodiment, a heat insulation layer 7 is provided between the outer shell 1 and the inner liner 2 for filling. A heat source cavity 71 with an outward indentation is provided on the side of the heat insulation layer 7 near the inner liner 2. A heating element is disposed inside the heat source cavity 71 to heat the inner liner 2. The heating element (not shown) is disposed inside the heat source cavity 71 to heat the inner liner 22. The heat insulation layer 77 is composed of a cotton layer of aluminosilicate fiber, and the heating element is composed of a resistance band. Aluminosilicate fiber is a new type of lightweight and energy-saving refractory material. It is a cotton-like inorganic fiber made from fused alumina as the main raw material, melted at a high temperature of 2100℃, and processed by high-speed centrifugation or blowing methods. Alumina silicate fiber has advantages such as high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity, good resistance to mechanical vibration, small thermal expansion, and good thermal insulation performance. When mixed with cotton layer for weaving or knitting, it can be made into thermal insulation layers 77 such as alumina silicate fiber board, alumina silicate fiber felt, alumina silicate fiber rope, and alumina silicate fiber blanket, which effectively retain the heat of the heating element on the surface of the inner liner 22, so that the inner liner 22 can continuously obtain heat for heating.

[0027] The installation structure between the stirring shaft 33 and the inner liner 22 is as follows: the middle part of the support plate 6 is provided with a mounting flange, the top end of the stirring shaft 3 is rotatably set inside the mounting flange through a bearing, and a feeding pipe 62 is provided on one side of the support plate 6. One end of the feeding pipe 62 can extend to the top end of the inner liner 2 for conductive connection.

[0028] In the above description, as a further embodiment, the drive mechanism 5 includes a motor 51 and a reducer 52. The output shaft of the motor 51 is connected to the reducer 52. The top surface of the reducer 52 is provided with a rotatable drive gear 53. The top of the stirring shaft 3 is provided with a driven gear 54. The drive gear 53 and the driven gear 54 mesh and transmit power. The bottom of the inner liner 2 is provided with a conical part 4. The bottom of the stirring shaft 3 is provided with scrapers 35 that extend obliquely to both sides. The scrapers 35 abut against the side walls of the conical part 4.

[0029] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A stirring shaft, comprising a shaft and a plurality of stirring blades, characterized in that: The stirring blades have a sickle-shaped structure, and several stirring blades are arranged in a linear spiral structure on the side wall of the shaft. The stirring blades include a blade part and a rod part. The blade part is rolledly connected to one end of the rod part, and the other end of the rod part is fixedly connected to the shaft. The blade part extends to the periphery of the shaft through the rod part. The side wall of the shaft is also provided with several cutting plates. The cutting plates have an arc-shaped structure, and several cutting plates are arranged in a linear spiral structure on the side wall of the shaft.

2. The stirring shaft according to claim 1, characterized in that: The side wall of the shaft is provided with several push plates. The push plates are vertical structures that extend to one side of the blade section. One end of the push plate is fixedly connected to the shaft, and the other end of the push plate is fixedly connected to the middle of the blade section.

3. A vertical coating reactor, characterized in that: The device includes an outer shell, an inner liner, and a stirring shaft as described in any one of claims 1-2. The outer shell has an open structure at both the top and bottom. The inner liner is disposed inside the outer shell, and both ends of the inner liner pass through the top and bottom of the outer shell, respectively. The inner liner has a cylindrical hollow structure. The stirring shaft is inserted into the inner liner. The top of the inner liner is provided with a support plate and a drive mechanism. The stirring shaft is rotatably disposed inside the inner liner through the drive mechanism.

4. A vertical coating reactor according to claim 3, characterized in that: The support plate has a mounting flange in the middle, and the top end of the stirring shaft is rotatably mounted inside the mounting flange via a bearing. A feeding pipe is provided on one side of the support plate, and one end of the feeding pipe can extend to the top of the inner liner for conductive connection.

5. A vertical coating reactor according to claim 4, characterized in that: The drive mechanism includes a motor and a reducer. The output shaft of the motor is connected to the reducer. The top surface of the reducer is provided with a rotatable drive gear, and the top surface of the stirring shaft is provided with a driven gear. The drive gear and the driven gear mesh and transmit power.

6. A vertical coating reactor according to claim 3, characterized in that: The bottom of the inner liner is provided with a conical section, and the bottom of the stirring shaft is provided with scrapers that extend obliquely to both sides, with the scrapers abutting against the side walls of the conical section.

7. A vertical coating reactor according to claim 3, characterized in that: A heat insulation layer is provided between the outer shell and the inner liner for filling. The side of the heat insulation layer near the inner liner has an outwardly recessed heat source cavity. The heating element is located inside the heat source cavity to heat the inner liner.

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