A large-scale gravity blending silo and blending device

Abstract

The present invention is applicable to the field of improving plastic particle blending technology, and provides a large-scale gravity blending silo. The large-scale gravity blending silo includes a cylinder body, an inverted cone, a plurality of blending pipes, a cylinder cone and a mixing cone. The bottom end of the cylinder body is connected to the upper end of the cylinder cone, the lower end of the cylinder cone is connected to the upper end of the mixing cone, and a plurality of the blending pipes are respectively arranged on the inner wall of the cylinder body. The bottom end of each blending pipe is connected to the inverted cone, the inverted cone is placed inside the cylinder cone and suspended at the bottom end of the cylinder cone, and the mixing cone eliminates material wall hanging by adjusting the size of the cone angle. The overall height of the blending silo is reduced, so that its manufacturing cost is reduced. The blending chamber formed by the inverted cone, the blending pipes, the cylinder cone and the mixing cone enables the materials in the blending pipes to flow out preferentially, improving the blending efficiency. The structure of the blending silo is simple and convenient to manufacture.

Description

Technical Field

[0001] The present invention belongs to the field of improvement of plastic particle blending technology, and particularly relates to a large-scale gravity blending bin and a blending device. Background Art

[0002] At present, in the field of powder engineering, the mixing of materials is an important unit operation, and the mixing and homogenization of materials accompany many technological processes in many fields. This includes the inter-crossing and penetration of two or more materials with different physical properties (such as particle size, density, morphology, etc.) and chemical properties, as well as the particles of the same material in different batches, so as to form a powder material that meets people's needs. The quality of mixing is related to the quality of the final product. For example, the production of a certain plastic particle requires a process of mixing materials with different melt indexes in different batches, and the small bubbles in the final product are caused by insufficient mixing uniformity. Therefore, a high-quality material mixing process is required in the production processes of many materials.

[0003] For free-flowing coarse-grained powders (such as Class D powders), it is the most economical to use a gravity mixing bin. Common gravity mixing bins have the following forms: multi-tube type, central tube type, wall-leaning type, and central cone type. The first three types of bins all use mixing pipes to mix materials. No matter what form is used for material mixing, the premise of the structure design of the mixing bin is based on an overall flow bin, and some internal components such as vertically arranged mixing pipes, homogenizers, or inverted cones are added inside it to achieve material mixing. However, improper design of the internal components, including the opening principle of the mixing pipes, the position where the inverted cone is added, and the structure of the mixing chamber, etc., will greatly reduce the effect of the mixing bin. Summary of the Invention

[0004] The purpose of the present invention is to provide a large-scale gravity blending bin and a blending device, aiming to solve the above technical problems.

[0005] The present invention is realized as follows: A large-scale gravity blending bin and a blending device, the large-scale gravity blending bin includes a cylinder body, an inverted cone, multiple mixing pipes, a cylinder cone, and a mixing cone. The bottom end of the cylinder body is connected to the upper end of the cylinder cone, the lower end of the cylinder cone is connected to the upper end of the mixing cone, multiple mixing pipes are respectively arranged on the inner wall of the cylinder body, the bottom end of each mixing pipe is connected to the inverted cone, the inverted cone is placed inside the cylinder cone and suspended at the bottom end of the cylinder cone, and the mixing cone eliminates material wall sticking by adjusting the size of the cone angle.

[0006] A further technical solution of the present invention is that there is a gap between the cylinder cone and the inverted cone.

[0007] A further technical solution of the present invention is that the inverted cone is integrally conical, and its cross-section is triangular.

[0008] A further technical solution of the present invention is that: the overall shape of the cylinder cone is a frustum of a cone, and the cross-section of the cylinder cone is a first trapezoid.

[0009] A further technical solution of the present invention is that: a discharge port is provided at the center of the bottom end of the mixing cone.

[0010] A further technical solution of the present invention is that: the overall shape of the mixing cone is a frustum of a cone, and the cross-section of the mixing cone is a second trapezoid.

[0011] A further technical solution of the present invention is that: the included angle b between the extension lines of the two side edges of the first trapezoid is smaller than the included angle a between the extension lines of the two side edges of the second trapezoid.

[0012] A further technical solution of the present invention is that: the included angle b between the extension lines of the two side edges of the first trapezoid is 50° - 70°; the included angle a between the extension lines of the two side edges of the second trapezoid is 110° - 130°.

[0013] A further technical solution of the present invention is that: the included angle b between the extension lines of the two side edges of the first trapezoid is 60°; the included angle a between the extension lines of the two side edges of the second trapezoid is 120°

[0014] Another object of the present invention is to provide a large-scale gravity blending device, and the large-scale gravity blending device includes the large-scale gravity blending bin described above.

[0015] The beneficial effects of the present invention are as follows: the overall height of the mixing bin is reduced, thereby reducing its manufacturing cost. The mixing chamber formed by the inverted cone and the blending pipe with the cylinder cone and the mixing cone enables the materials in the blending pipe to flow out preferentially, improving the blending efficiency. The structure of the blending bin is simple and convenient to manufacture. Description of the Drawings

[0016] Figure 1 is the schematic plan view of the large-scale gravity blending bin provided by the embodiment of the present invention Figure 1 .

[0017] Figure 2 is the schematic plan view of the large-scale gravity blending bin provided by the embodiment of the present invention Figure 2 . Detailed Embodiments

[0018] Reference Signs: 1 - Discharge Port 2 - Mixing Cone 3 - Cylinder Cone 4 - Cylinder 5 - Inverted Cone 6 - Blending Pipe

[0019] Such as Figure 1 , 2As shown in the figure, the present invention provides a large-scale gravity blending silo and a blending device. The large-scale gravity blending silo includes a cylinder body 4, an inverted cone 5, multiple blending pipes 6, a cylinder cone 3, and a mixing cone 2. The bottom end of the cylinder body 4 is connected to the upper end of the cylinder cone 3, and the lower end of the cylinder cone 3 is connected to the upper end of the mixing cone 2. Multiple blending pipes 6 are respectively arranged on the inner wall of the cylinder body 4, and the bottom end of each blending pipe 6 is connected to the inverted cone 5. The inverted cone 5 is placed inside the cylinder cone 3 and suspended at the bottom end of the cylinder cone 3. The mixing cone 2 eliminates material wall sticking by adjusting the size of the cone angle. When the material is fed and blended, the feeding amount at the feeding port c is less than the sum of the feeding amounts of multiple blending pipes. Therefore, during feeding, the material is fed from the middle first and then from the surrounding areas. During the feeding process, no wall sticking phenomenon occurs because the design principle of the central flow is satisfied.

[0020] A gap is provided between the cylinder cone 3 and the inverted cone 4. An admixture chamber is formed by the inverted cone 5, enabling the material to be mixed more thoroughly and evenly during the mixing process.

[0021] The inverted cone 5 is generally conical in shape, and its cross-section is triangular. The triangular inverted cone enables the material to flow down more smoothly without causing an obstructive effect.

[0022] The cylinder cone 3 is generally frustum-shaped, and the cross-section of the cylinder cone 3 is a first trapezoid. The frustum-shaped structure is used to gradually narrow the lower end, so that the gravity of the material does not all concentrate at the bottom end during use, reducing the pressure at the bottom end.

[0023] An outlet is provided at the center of the bottom end of the mixing cone 2.

[0024] The mixing cone 2 is generally frustum-shaped, and the cross-section of the mixing cone 2 is a second trapezoid.

[0025] The included angle b between the extension lines of the two side edges of the first trapezoid is less than the included angle a between the extension lines of the two side edges of the second trapezoid.

[0026] The included angle b between the extension lines of the two side edges of the first trapezoid is 50° - 70°; among them, the optimal included angle b between the extension lines of the two side edges of the first trapezoid is 60°. According to the mechanical principle and the action of gravity, the side included angle should satisfy the central flow design.

[0027] The included angle a between the extension lines of the two side edges of the second trapezoid is 110° - 130°; among them, the optimal included angle a between the extension lines of the two side edges of the second trapezoid is 120°.

[0028] The material enters the mixed material cavity formed by the mixing cone 2 and the inverted cone 5 through multiple blending pipes 6. After mixing, it flows out of the outlet 1. As Figure 1 、 2As shown in the figure: When the materials are blended, the feeding volume of the feeding port c is less than the total feeding volume of multiple blending pipes 6, and the mixing material cavity is filled with materials. Due to the small inclination of the side wall of the designed mixing cone 2, the pressure of the materials in the mixing cone 2 on the central discharge port 1 is less than the pressure of the materials flowing down from the center of the mixing material cavity, which causes the materials in the gap between the cylinder cone 3 and the inverted cone 5 to be static and unable to flow down. Finally, the materials in the blending pipe 6 flow out preferentially through the blending chamber to form blending. When the materials are emptied from the storage bin, the feeding capacity of the feeding port c is greater than the total capacity of multiple blending pipes 6, and the designed relationship of the angle a of the mixing cone 2 will not cause the materials to hang on the wall of the mixing cone 2, and the materials can smoothly enter the mixing cone 2 from the cylinder cone 3 until the storage bin is emptied.

[0029] Another object of the present invention is to provide a large-scale gravity blending device, and the large-scale gravity blending device includes the large-scale gravity blending bin described above.

[0030] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-scale gravity blending silo, characterized in that, The large gravity blending silo includes a cylinder body, an inverted cone, a plurality of blending pipes, a cylinder cone and a mixing cone. The bottom end of the cylinder body is connected to the upper end of the cylinder cone, the lower end of the cylinder cone is connected to the upper end of the mixing cone, and the plurality of blending pipes are respectively arranged on the inner wall of the cylinder body. The bottom end of each blending pipe is connected to the inverted cone, and the inverted cone is placed inside the cylinder cone and suspended at the bottom end of the cylinder cone; A gap is provided between the cylinder cone and the inverted cone; The cylinder cone is integrally frustum-shaped, and the cross-section of the cylinder cone is a first trapezoid; The mixing cone is integrally frustum-shaped, and the cross-section of the mixing cone is a second trapezoid; The included angle b between the extension lines of the two sides of the first trapezoid is smaller than the included angle a between the extension lines of the two sides of the second trapezoid.

2. The large gravity blending silo according to claim 1, characterized in that The inverted cone is integrally conical, and its cross-section is triangular.

3. The large gravity blending silo according to claim 2, characterized in that, A discharge port is provided at the center of the bottom end of the mixing cone.

4. The large gravity blending silo according to claim 3, characterized in that, The included angle b between the extension lines of the two sides of the first trapezoid is 50°-70°; the included angle a between the extension lines of the two sides of the second trapezoid is 110°-130°.

5. The large gravity blending silo according to claim 4, characterized in that, The included angle b between the extension lines of the two sides of the first trapezoid is 60°; the included angle a between the extension lines of the two sides of the second trapezoid is 120° 6. A large-scale gravity blending device, characterized in that, The large gravity blending device includes the large gravity blending silo according to any one of claims 1-5.

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