Gravity mixing bin structure
By combining the central and peripheral mixing pipes and using a bottom ventilation design, the problem of EPOE particles easily sticking together and accumulating during the mixing process is solved, achieving more uniform material mixing and a stable mixing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING PETROCHEM ENG
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-21
AI Technical Summary
EPOE particles are prone to sticking and accumulating during the blending process, resulting in severe bridging and affecting the blending effect.
The system employs a combination of a central mixing pipe and an outer mixing pipe to increase the mixing path and methods. It also introduces gas through a bottom ventilation pipe to remove excess heat and free moisture. Combined with a rationally designed baffle and guide plate, it optimizes material flow and mixing.
It improves the uniformity of mixing, reduces the accumulation and bridging of viscous materials, ensures the stability of the physical state of the materials, and improves the mixing quality.
Smart Images
Figure CN224141918U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blending bin technology, specifically to gravity blending bin structure. Background Technology
[0002] Gravity mixing silos are solid material silos that utilize the weight of materials for mixing. They are widely used in industries such as chemicals, plastics, and food, primarily for storing and mixing solid granular or powdery materials. Gravity mixing silos employ mixing devices installed inside the silo, utilizing the natural flow of materials during discharge to achieve mixing of different batches or materials with different properties, resulting in uniform and stable physical properties.
[0003] In existing technologies, wall-mounted blending pipes are often used as the main method for blending polyolefin materials (such as EPOE). Multiple blending pipes are arranged on the inner wall of the blending chamber. The wall-mounted blending pipes are semi-circular pipes, and the interior is divided into three chambers on average. The included angle between the partitions of the three chambers is about 60°, and there are material outlets at different elevations.
[0004] However, when specifically blending EPOE (ethylene-propylene-octene copolymer), the EPOE particles themselves are sticky and easily stick together at room temperature. They also have a certain degree of elasticity and will deform under force. In the EPOE blending process, using a traditional wall-mounted tubular blending chamber with a small diameter and small cross-sectional area of the working chamber allows a large number of EPOE particles to enter the blending chamber, easily causing particle accumulation inside the blending tube. Under the influence of gravity, the EPOE particles are compressed and deformed. Combined with their inherent stickiness, they easily adhere to the tube wall, forming bridging, resulting in even more particle accumulation and more severe bridging, thus affecting the blending effect. Utility Model Content
[0005] In view of this, the present invention provides a gravity mixing chamber structure to solve the problem of easy bridging during the EPOE mixing process.
[0006] This utility model provides a gravity mixing chamber structure, including:
[0007] Warehouse body;
[0008] A central mixing pipe is vertically installed at the center of the silo, and several feed inlets are provided on the side wall of the central mixing pipe.
[0009] Multiple peripheral mixing pipes are evenly distributed on the circumference of the silo body with the center of the silo body as the center and the radius of the silo body as the diameter. Each of the peripheral mixing pipes has several feed inlets on its side wall.
[0010] The bottom ventilation pipe includes an annular main body and several branches connected to the main body. The annular main body is arranged around the outer periphery of the chamber body. The ends of all the branches away from the main body are inserted into the interior of the chamber body. The bottom ventilation pipe is used to introduce gas into the chamber body.
[0011] Beneficial Effects: Materials enter the silo through the inlet and, under gravity, pass through inlets at different heights in the central mixing pipe and multiple peripheral mixing pipes. Inside the pipes, the materials flow within their respective chambers, achieving initial mixing through material mixing between different chambers. Simultaneously, the annular main body of the bottom ventilation pipe continuously introduces gas into the silo, which enters the silo through branches and diffuses within the silo. The central and peripheral mixing pipes allow materials to enter and mix from different locations, increasing the mixing paths and methods compared to the traditional central pipe type, thus improving mixing uniformity. The multiple mixing pipes are divided into multiple chambers with a reasonable angle design between them, effectively reducing the accumulation and bridging of viscous materials compared to traditional multi-pipe and wall-mounted types, thus improving the mixing effect for viscous materials. The gas introduced through the bottom ventilation pipe can remove residual heat and free moisture from the material. For materials with low melting points, such as EPOE, it can prevent them from softening due to residual heat release in subsequent processes, avoid material sticking, ensure the stability of the material's physical state, and improve the blending quality.
[0012] In one optional embodiment, the diameters of both the central mixing pipe and the peripheral mixing pipe are 1 / 8 of the inner diameter of the chamber.
[0013] Beneficial effects: This setting increases the diameter of the mixing tube, which is 1 / 8 of the diameter of the mixing chamber, thus increasing the cross-sectional area of the mixing tube, reducing the accumulation of EPOE particles, mitigating the possibility of bridging, and ensuring the mixing effect.
[0014] In one alternative embodiment, the central mixing tube and the peripheral mixing tube are each provided with three baffles, the baffles being configured to divide the interior of each mixing tube into three working chambers.
[0015] One side of each of the three partitions is connected at the center of the mixing tube, and the other side of each partition is fixed to the inner wall of the mixing tube. The included angle between adjacent partitions is 120°.
[0016] Beneficial Effects: After entering the silo, the material flows into the central mixing pipe and the outer mixing pipe under gravity. The material entering the mixing pipe is separated by three baffles inside the pipe, entering three separate chambers. Because the angle between adjacent baffles is 120°, the material flows along specific paths and directions in each chamber. During this flow, the material in different chambers comes into contact with and interweaves with each other, achieving mixing. As the material continues to flow, the mixing process continues until it is discharged from the outlet. The baffles divide the mixing pipe into three chambers at 120° angles, allowing the material to have different flow trajectories in different chambers, increasing the contact area and mixing opportunities between materials, resulting in more uniform mixing and effectively improving the mixing effect. The baffles are equivalent to adding an internal support structure to the mixing pipe, enhancing the overall structural strength of the mixing pipe and reducing the risk of breakage or deformation caused by material impact and compression.
[0017] In one alternative embodiment, the inner wall surface of the mixing tube is a smooth surface.
[0018] Beneficial effects: After entering the mixing chamber, the material enters the mixing pipe under the action of gravity. Since the inner wall surface of the mixing pipe is smooth, the friction between the material and the inner wall is small when the material flows in the pipe, allowing it to slide and flow smoothly along the inner wall and move from the inlet to the outlet, completing the mixing with other materials during the movement.
[0019] In one alternative embodiment, the bottom ventilation duct is configured to continuously supply low-temperature dry air at a temperature below the melting point of the material to remove residual heat and free moisture from the material.
[0020] In one optional embodiment, the gravity mixing chamber structure further includes multiple layers of guide plates, which are inclined between the inner wall of the chamber and the outer mixing pipe. The inclination angle of the guide plates is 45°, and the surface of the guide plates is polished, with smooth transitions at the welded joints.
[0021] Beneficial effects: After entering the silo, the material falls under the influence of gravity. During the fall, the material comes into contact with a guide plate at a 45° angle. Due to the polished surface of the guide plate and the smooth transition of the welded joints, the material changes its flow trajectory along the inclination direction of the guide plate, flowing orderly between the inner wall of the silo and the outer mixing pipe, and then flows towards the feed inlet of the mixing pipe.
[0022] In one optional embodiment, the guide plates are arranged in layers along the height direction of the silo, and the number of guide plates in each layer is the same as the number of peripheral mixing pipes.
[0023] In one alternative embodiment, the guide plate is welded to the inner wall of the silo and the outer mixing pipe, and the guide plate is also configured to enhance the support strength of the mixing pipe and guide the material flow direction.
[0024] In one alternative embodiment, the number of peripheral mixing tubes is four, evenly distributed on the circumference.
[0025] In one optional embodiment, the central mixing pipe and the peripheral mixing pipe are provided with inlets at different heights for collecting materials in the bin in layers.
[0026] Beneficial effects: Layered material collection within the storage area allows for greater opportunities for mixing between materials from different batches, with different properties, or located at different levels. Compared to collecting materials from a single height, this method increases the contact and mixing opportunities between materials, significantly improving the uniformity of material blending and ensuring the stability of the final product quality. Attached Figure Description
[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of a gravity mixing chamber structure according to an embodiment of the present utility model;
[0029] Figure 2 This is a top view of a gravity mixing chamber structure according to an embodiment of the present utility model.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. Silo body; 2. Central mixing pipe; 3. Peripheral mixing pipe; 4. Bottom ventilation pipe; 5. Baffle; 6. Guide plate. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0033] Gravity mixing silos are solid material silos that utilize the weight of materials for mixing. They are widely used in industries such as chemicals, plastics, and food, primarily for storing and mixing solid granular or powdery materials. Gravity mixing silos employ mixing devices installed inside the silo, utilizing the natural flow of materials during discharge to achieve mixing of different batches or materials with different properties, resulting in uniform and stable physical properties.
[0034] In existing technologies, wall-mounted blending pipes are often used as the main method for blending polyolefin materials (such as EPOE). Multiple blending pipes are arranged on the inner wall of the blending chamber. The wall-mounted blending pipes are semi-circular pipes, and the interior is divided into three chambers on average. The included angle between the partitions of the three chambers is about 60°, and there are material outlets at different elevations.
[0035] However, when specifically blending EPOE (ethylene-propylene-octene copolymer), the EPOE particles themselves are sticky and easily stick together at room temperature. They also have a certain degree of elasticity and will deform under force. In the EPOE blending process, using a traditional wall-mounted tubular blending chamber with a small diameter and small cross-sectional area of the working chamber allows a large number of EPOE particles to enter the blending chamber, easily causing particle accumulation inside the blending tube. Under the influence of gravity, the EPOE particles are compressed and deformed. Combined with their inherent stickiness, they easily adhere to the tube wall, forming bridging, resulting in even more particle accumulation and more severe bridging, thus affecting the blending effect.
[0036] The following is combined Figures 1 to 2 The following describes embodiments of the present invention.
[0037] According to an embodiment of the present invention, a gravity mixing chamber structure is provided, including a chamber body 1, a central mixing pipe 2, multiple peripheral mixing pipes 3, and a bottom ventilation pipe 4. The central mixing pipe 2 is vertically disposed at the center of the chamber body 1, and the peripheral mixing pipes 3 are evenly distributed on the circumference with the center of the chamber body 1 as the center and the radius of the chamber body 1 as the diameter. The bottom ventilation pipe 4 includes an annular main body and several branches connected to the main body. The annular main body is arranged around the outer periphery of the chamber body 1, and the ends of all branches away from the main body are inserted into the interior of the chamber body 1. The bottom ventilation pipe 4 is used to introduce gas into the chamber body 1.
[0038] In the above embodiment, the material enters the silo 1 through the inlet and, under the influence of gravity, enters the pipes through inlets at different heights set in the central mixing pipe 2 and multiple peripheral mixing pipes 3. Inside the pipes, the material flows in its respective working chamber, and initial mixing is achieved through material mixing between different working chambers. At the same time, the annular main body of the bottom ventilation pipe 4 continuously introduces gas into the silo, and the gas enters the silo 1 through branches and diffuses within the silo 1. The arrangement of the central mixing pipe 2 and the peripheral mixing pipes 3 allows the material to enter the mixing pipes from different positions for mixing. Compared with the traditional central pipe type, this increases the mixing path and method, and improves the uniformity of mixing. The multiple mixing pipes are divided into multiple working chambers, and the angle between the working chambers is reasonably designed. Compared with the traditional wall-mounted type, this effectively reduces the accumulation and bridging of viscous materials, and improves the mixing effect of viscous materials. The gas introduced through the bottom ventilation pipe 4 can remove residual heat and free moisture from the material. For materials with low melting points such as EPOE, it can prevent them from softening due to residual heat release in subsequent processes, avoid material sticking, ensure the stability of the material's physical state, and improve the blending quality.
[0039] like Figure 1 and Figure 2 In the structure shown, there are four peripheral mixing pipes 3, and all four peripheral mixing pipes 3 are fixed to the central mixing pipe 2 by fixing rods. At the same time, the four peripheral mixing pipes 3 can also be fixed to the side wall of the silo body 1 by fixing rods.
[0040] In one embodiment, the diameters of both the central mixing pipe 2 and the outer mixing pipe 3 are 1 / 8 of the inner diameter of the chamber 1. This arrangement increases the diameter of the mixing pipes, making it 1 / 8 of the diameter of the mixing chamber, which in turn increases the cross-sectional area of the mixing pipes, reduces the accumulation of EPOE particles, mitigates the possibility of bridging, and ensures the mixing effect.
[0041] In one embodiment, such as Figure 2 As shown, the central mixing tube 2 and the outer mixing tube 3 are each provided with three partitions 5. The partitions 5 are configured to divide the interior of each mixing tube into three working chambers. One side of each of the three partitions 5 is connected at the center of the mixing tube, and the other side of each of the three partitions 5 is fixed to the inner wall of the mixing tube. The included angle between adjacent partitions 5 is 120°.
[0042] In the above embodiment, after the material enters the chamber 1, it flows into the central mixing pipe 2 and the outer mixing pipe 3 under the action of gravity. The material entering the mixing pipe is separated by three baffles 5 inside the pipe and enters three working chambers respectively. Since the included angle between adjacent baffles 5 is 120°, the material flows in each working chamber along a specific path and direction. During the flow, the material in different working chambers comes into contact with and interweaves with each other, achieving mixing. As the material continues to flow in and out, the mixing process continues until it is discharged from the outlet. The baffles 5 divide the mixing pipe into three working chambers at an included angle of 120°, so that the material has different flow trajectories in different working chambers, increasing the contact area and mixing opportunities between the materials, making the material more uniformly mixed, and effectively improving the mixing effect. The setting of the baffles 5 is equivalent to adding an internal support structure to the mixing pipe, enhancing the overall structural strength of the mixing pipe, and reducing the risk of the mixing pipe breaking or deforming due to material impact and compression.
[0043] In one embodiment, the inner wall surface of the blending pipe is smooth. After the material enters the blending chamber, it enters the blending pipe under the action of gravity. Because the inner wall surface of the blending pipe is smooth, the friction between the material and the inner wall is small when the material flows in the pipe, allowing it to slide and flow smoothly along the inner wall, moving from the inlet to the outlet, and completing the blending with other materials during the movement.
[0044] In the above embodiments, the smooth inner wall makes it difficult for materials to adhere to the inner wall of the mixing tube. For viscous materials, it can also reduce the possibility of them sticking to the inner wall and causing blockage, ensuring the normal flow of materials in the tube and maintaining the continuity of the mixing operation.
[0045] In one embodiment, the bottom ventilation duct 4 is configured to continuously introduce low-temperature dry air with a temperature below the melting point of the material to remove residual heat and free moisture from the material. The bottom ventilation duct 4 continuously introduces low-temperature dry air with a temperature below the melting point of the material into the chamber 1. Specifically, after the air enters the chamber 1 through a branch of the ventilation duct, it comes into full contact with the material inside the chamber. During this contact process, the low-temperature dry air absorbs the residual heat emitted by the material and removes free moisture from the material. Subsequently, the air is discharged from the air outlet provided on the chamber 1, completing the heat and moisture exchange cycle.
[0046] For materials with low melting points, such as EPOE, the continuous flow of low-temperature dry air can remove residual heat from the material, keeping the material temperature below the melting point. This effectively prevents the material from softening due to excessive temperature, avoids adhesion between materials, maintains the independent state of material particles, and ensures the blending effect.
[0047] In one embodiment, the mixing chamber structure further includes multiple layers of guide plates 6. The guide plates 6 are inclined between the inner wall of the chamber body 1 and the outer mixing pipe 3. The inclination angle of the guide plates 6 is 45°, and the surface of the guide plates 6 is polished. The welded joints of the guide plates 6 are smoothly transitioned.
[0048] In the above embodiment, after the material enters the silo 1, it falls under the action of gravity. During the fall, the material comes into contact with the guide plate 6, which is inclined at an angle of 45°. Since the surface of the guide plate 6 is polished and the welded joints are smoothly transitioned, the material changes its flow trajectory along the inclined direction of the guide plate 6, and flows in an orderly manner between the inner wall of the silo 1 and the outer mixing pipe 3, and then flows to the feed inlet of the mixing pipe.
[0049] The 45° inclined guide plate 6 alters the material flow direction, resulting in a more uniform distribution of material within the chamber. This increases contact and mixing opportunities between materials, improving the uniformity of blending and allowing materials of different batches or properties to blend better, thus enhancing the quality of the final product. The guide plate 6 is positioned between the inner wall of the chamber 1 and the outer blending pipe 3, providing support to the pipe and helping to distribute the pressure of the material on it. This prevents the pipe from bending or breaking due to uneven stress, ensuring the structural stability and normal operation of the blending pipe. The polished surface and smooth welded joints of the guide plate 6 reduce friction between the material and the guide plate 6, allowing the material to flow more smoothly on it. This reduces the risk of blockage within the chamber, ensuring efficient material flow and ultimately improving the overall efficiency of the blending chamber.
[0050] In one embodiment, the guide plates 6 are arranged in layers along the height direction of the chamber 1, and the number of guide plates 6 in each layer is the same as the number of the outer mixing pipes 3.
[0051] In the above embodiment, after the material enters the silo 1, it moves downwards under the action of gravity. When the material encounters the guide plates 6 arranged in layers along the height direction of the silo 1, it slides down along the surface of each layer of guide plates 6. Since the number of each layer of guide plates 6 is the same as the number of peripheral mixing pipes 3, the material is evenly guided to the inlet of each peripheral mixing pipe 3 during the sliding process. At the same time, during the movement between the layers of guide plates 6, the material continuously changes its flow direction, interpenetrating and mixing with the material at different positions. The layered guide plates 6 support the mixing pipes from multiple heights, enhancing the support effect of the mixing pipes, reducing the risk of deformation or damage to the mixing pipes due to material impact and compression, and extending the service life of the mixing pipes.
[0052] In one embodiment, the guide plate 6 is welded to the inner wall of the silo 1 and the outer mixing pipe 3. The guide plate 6 is also configured to enhance the support strength of the mixing pipe and guide the flow direction of the material.
[0053] The guide plate 6 guides the flow direction of the material, allowing the material to move more orderly within the silo 1, avoiding turbulent flow or local accumulation, reducing dead zones in the material flow within the silo, and enabling the material to enter the mixing pipe more efficiently for mixing, thus improving the working efficiency of the mixing silo. The guide plate 6 is welded to the inner wall of the silo 1 and the outer mixing pipe 3, providing additional structural support for the mixing pipe.
[0054] In one embodiment, inlet ports are provided at different heights of the central mixing pipe 2 and the peripheral mixing pipe 3 for collecting materials in the bin in layers.
[0055] In the above embodiments, materials are collected in layers within the storage chamber, allowing for greater opportunities for mixing between materials from different batches, with different properties, or located at different levels. Compared to collecting materials from a single height, this method increases the contact and mixing opportunities between materials, significantly improving the uniformity of material mixing and ensuring the stability of the final product quality.
[0056] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A gravity blending bin structure, characterized by, The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device.
2. The gravity blending bin structure of claim 1, wherein, The application relates to a material mixing device.
3. A gravity blending bin structure according to claim 1 or 2, characterised in that, The application relates to a material mixing device. The application relates to a material mixing device.
4. The blender bin structure of claim 3, wherein, The application relates to a material mixing device.
5. The blender bin structure of claim 1, wherein, The application relates to a material mixing device.
6. The blender bin structure of claim 1, wherein, The application relates to a material mixing device.
7. The blender bin structure of claim 6, wherein, The application relates to a material mixing device.
8. A blending bin structure according to claim 6 or 7, characterised in that, The application relates to a material mixing device.
9. The blender bin structure of claim 1, wherein, The application relates to a material mixing device.
10. The blender bin structure of claim 1, wherein, The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates to a material mixing device. The application relates