A stirring blade suitable for high viscosity epoxy fireproof paint

Abstract

The utility model discloses a kind of stirring paddle suitable for high viscosity epoxy fireproof coating, including stirring frame and stirring assembly by differential drive of pivot, the stirring assembly is located bottom and inside stirring frame, the stirring frame of outside is used low speed rotation, the stirring assembly of inside is used high speed rotation, the stirring assembly both sides are provided with the propeller blade of upper and lower link, the rotation direction of two propeller blades is different.The utility model discloses a kind of stirring paddle suitable for high viscosity epoxy fireproof coating, while stirring using outside low speed large size stirring frame, match the propeller blade of the rotation direction of both sides being different, a certain degree plays the effect of extruding the coating of outside to inside and exchanging with the coating of inside being stirred, the stirring assembly of small size set inside is then used for fully stirring, finally realize the whole uniform stirring of viscous material in kettle body.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, specifically to a mixing blade adapted to high-viscosity epoxy fireproof coating. Background Technology

[0002] Stirring involves creating a circulation within a stirring device to uniformly mix gases, liquids, and even suspended particles in a solution. To achieve this, forced convection and homogeneous mixing are required—the internal components of the stirring device. For high-viscosity materials, as illustrated in application number 202320196687.5, entitled "A Coaxial Dual-Speed ​​Stirring Device for Stirring High-Viscosity Materials," a high-speed motor reducer and a low-speed motor reducer respectively drive a paddle stirrer and a frame stirrer. The difference in speed between the output speeds of the high-speed and low-speed motor reducers enables differential speed movement between the frame and paddle stirrers, resulting in better agitation of the materials within the vessel and improved mixing.

[0003] However, considering that the differential rotation design is based on the high viscosity of the coating, if the overall size of the agitator is too large, the torque on the blade root and shaft section can easily increase linearly with viscosity. Due to the long lever arm, the stress at the root of the large blade can quickly exceed the material's yield strength, leading to fracture. Simply using a small-sized agitator rotating at high speed can result in insufficient mixing, making it difficult for the coating on the outer side to enter the inner mixing cycle.

[0004] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a stirring blade adapted to high-viscosity epoxy fire-retardant coatings, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a stirring blade adapted to high-viscosity epoxy fireproof coating, comprising a stirring frame and a stirring assembly driven by a differential speed of a rotating shaft, characterized in that: the stirring assembly is located at the bottom and inside the stirring frame, the stirring frame on the outer side rotates at a low speed, and the stirring assembly on the inner side rotates at a high speed, and the stirring assembly is provided with upper and lower connecting propeller blades on both sides, the two propeller blades rotating in opposite directions.

[0007] Preferably, the inner side of the stirring frame is provided with a plurality of obliquely cut blades at axial intervals.

[0008] Preferably, the stirring assembly includes an upper turntable and a lower turntable, which are installed and fixed together by a plurality of axial flange rods and flanges. The outer edges of the upper turntable and the lower turntable are respectively equipped with outer stirring blocks and inner stirring blocks, which are arranged alternately and together with the upper turntable and the lower turntable to form a double layer of blades.

[0009] Preferably, the upper and lower turntables are spaced apart to allow for longitudinal space, and a through opening is provided at the center of the upper turntable.

[0010] Preferably, the outer stirring block and the inner stirring block are closely arranged and installed outward at an angle relative to the upper or lower turntable.

[0011] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: The stirring blade of this utility model is adapted to high viscosity epoxy fireproof coating. It adopts a large-size stirring frame with low speed on the outside. While stirring, it is matched with propeller blades with opposite rotation directions on both sides. To a certain extent, it can squeeze the coating on the outside inward and exchange it with the coating on the inside after stirring. The small-size stirring component set on the inside is used for thorough stirring, and finally achieves uniform stirring of the material in the entire vessel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the stirring blade of this utility model; Figure 2 This is a schematic diagram of the stirring assembly of this utility model.

[0013] In the diagram: 1. Rotating shaft; 2. Stirring frame; 3. Angled blade; 4. Propeller blade; 5. Stirring assembly; 51. Upper turntable; 52. Lower turntable; 53. Outer stirring block; 54. Inner stirring block; 55. Flange rod; 6. Through port. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 As shown: A stirring blade adapted for high-viscosity epoxy fire-retardant coatings includes a stirring frame 2 and a stirring assembly 5 driven differentially by a rotating shaft 1. The stirring assembly 5 is located at the bottom and inside the stirring frame 2. The outer stirring frame 2 rotates at a low speed, while the inner stirring assembly 5 rotates at a high speed. Multiple obliquely cut blades 3 are axially spaced along the inner side of the stirring frame 2, and large-sized propeller blades 4 are connected vertically on both sides, with the two propeller blades 4 rotating in opposite directions.

[0016] In this embodiment, a large-sized stirring frame 2 with low speed on the outer side is used in conjunction with two propeller blades 4 rotating in opposite directions on both sides. This effectively forces the coating material on the outer side inward and exchanges it with the coating material on the inner side after stirring. The small-sized stirring component 5 on the inner side is used for thorough stirring, ultimately achieving uniform stirring of the material throughout the vessel. A rotating seat is located at the center of the bottom of the vessel, and the bottom of the stirring frame is rotatably connected to this rotating seat to form an auxiliary rotation (to prevent the lower side of the stirring frame from deviating due to excessive speed). The drive structure of the stirring frame is located at the top and is independent of the rotation of the rotating shaft.

[0017] The structure and driving method of differential drive have been disclosed and can be found in the publicly available documents in the background section. This embodiment will not be elaborated on in detail.

[0018] When applying the mixture, the stirring frame 2 should be designed to be close to the inner wall of the vessel to prevent the coating material located on its outer side from being unable to be incorporated into the stirring system, thus preventing stirring from taking place.

[0019] High-viscosity epoxy fire-retardant coatings generally require strong shear force and circulating flow to achieve uniform mixing. However, ordinary single-layer blades or uniformly distributed blades are difficult to push high-viscosity fluids to form effective flow, and are more likely to "cut off" or slip, resulting in low mixing efficiency.

[0020] See appendix Figure 2 The mixing assembly 5 includes an upper rotating disk 51 and a lower rotating disk 52, which are fixed together by multiple axial flange rods 55 with flanges. The upper rotating disk 51 and the lower rotating disk 52 are spaced apart to allow for longitudinal space. The outer edges of the upper rotating disk 51 and the lower rotating disk 52 are respectively equipped with outer stirring blocks 53 and inner stirring blocks 54. The outer stirring blocks 53 and the inner stirring blocks 54 are arranged alternately to form a double-layer blade. The double-layer blade can significantly enhance axial circulation and turbulence intensity, form a more uniform flow field distribution, and is less likely to generate flow dead zones, especially between the blades and near the axis, where mixing is more thorough.

[0021] During the high-speed stirring process of fire-retardant coatings, bubbles are easily generated. In the area near the stirring blades where the shear force is strongest and the turbulence is most intense, air is "cut" by the high-speed rotating blades and entrained into the liquid, causing bubbles to easily accumulate near the stirring blades (especially at the edge of the dispersion disc teeth). Therefore, in this embodiment, the outer stirring blocks 53 and the inner stirring blocks 54 are closely arranged and installed at an angle to the outward relative to the upper rotating disc 51 or the lower rotating disc 52. The closely spaced outer stirring blocks 53 and the inner stirring blocks 54 form a continuous shear band, which is more conducive to generating shear force on the coating and breaking up agglomerated particles. The irregular distribution of the outer and inner stirring blocks makes it less likely for bubbles to form and can also disperse nearby bubbles to a certain extent.

[0022] The upper turntable 51 also has a through-hole 6 at its center, which allows the paint to enter the gap between the upper turntable 51 and the lower turntable 52, so as to exchange the paint between the upper and lower layers, which is more conducive to the uniform mixing of the material.

[0023] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A stirring blade adapted for high-viscosity epoxy fire-retardant coatings, comprising a stirring frame and a stirring assembly driven by a differential speed via a rotating shaft, characterized in that: The stirring assembly is located at the bottom and inside the stirring frame. The stirring frame on the outside rotates at a low speed, while the stirring assembly on the inside rotates at a high speed. The stirring assembly has upper and lower connecting propeller blades on both sides, and the two propeller blades rotate in opposite directions.

2. The stirring blade adapted to high-viscosity epoxy fire-retardant coating according to claim 1, characterized in that: The inner side of the stirring frame is provided with multiple oblique blades spaced axially.

3. The stirring blade adapted to high-viscosity epoxy fire-retardant coating according to claim 1, characterized in that: The stirring assembly includes an upper turntable and a lower turntable. The upper and lower turntables are installed and fixed together by multiple axial flange rods and flanges. The outer edges of the upper and lower turntables are respectively equipped with outer stirring blocks and inner stirring blocks. The outer stirring blocks and inner stirring blocks are arranged alternately and together with the upper and lower turntables to form double-layer blades.

4. The stirring blade adapted to high-viscosity epoxy fire-retardant coating according to claim 3, characterized in that: The upper and lower turntables are spaced apart to allow for longitudinal space, and a through opening is provided at the center of the upper turntable.

5. The stirring blade adapted to high-viscosity epoxy fire-retardant coating according to claim 3, characterized in that: The outer and inner stirring blocks are closely arranged and installed outwards at an angle relative to the upper or lower turntable.

Images