A gravity blending silo for powder materials

Abstract

The present invention belongs to the technical field of powder blending, and relates to a gravity blending silo for powder, comprising a silo body, and a blending assembly arranged inside the silo body, wherein the blending assembly is connected to a vibrator via a top connecting structure above the blending assembly, and is connected to a blending chamber via a bottom connecting structure below the blending chamber, a connecting flange is provided between the blending chamber and the silo body, and an annular channel is formed between the silo body and the blending assembly at a position above the connecting flange. The present invention enables powders of different batches and different physical properties to flow into the blending tube and the blending chamber at the same time, and can overcome the coarse and fine powder stratification formed during the falling process due to the action of gravity; the design of the spiral distribution of the feed port on the blending tube enables powders of different heights to fall into the blending tube and the blending chamber at the same time, and the purpose of this is to increase the blending efficiency of the device and make the feeding more uniform when the powder falls in batches.

Description

Technical Field

[0001] The invention belongs to the technical field of powder blending, and in particular relates to a gravity blending silo for powder. Background Art

[0002] In industrial production, powders, granules, and bulk materials often require homogenization. For granular materials, a gravity-type blending silo can be used. Material entering the silo at different times flows into blending tubes at different heights, and all blending tubes converge into a blending chamber, achieving homogenization of the material leaving the silo. Another approach is to install guide cones at the bottom of the silo, which ensure that the material flowing through the guide cones has different flow rates in different compartments, thereby achieving homogenization of the material within a certain range.

[0003] For powder blending: Because powders have relatively poor fluidity and tend to stick to the walls of the blending tube, fluidization and high-pressure airflow blending have traditionally been used to homogenize powders. Fluidization can achieve homogenization in powder mixing plants, but its drawbacks are long operation times, typically 5 to 6 hours, and high energy consumption.

[0004] For air flow mixing: the air flow mixer is installed at the bottom of the mixing silo and uses the kinetic energy generated by the rapid expansion and release of compressed air to lift, flip and roll the dry material, thereby achieving uniform mixing and producing qualified products with the required ingredient ratio.

[0005] During operation, the air flow mixer cylinder is first fed with compressed air at a source pressure of 0.5 to 0.8 MPa. This energizes the cylinder, driving the triangular cone upward. When the blender reaches a certain position, the blender closes. Compressed air at 0.2 to 0.3 MPa is then fed into the sealing ring (made of fluororubber), causing it to expand. This expansion presses against the surface of the triangular cone, forming a sealing ring. A negative pressure system is then used to introduce different types of materials into the blending silo through the material inlet. Loading stops when the material in the blending silo reaches a predetermined height. After loading, compressed air at 1.6 to 2.0 MPa is introduced into two chambers through inlets A and B. Each chamber is optimized to have 10 clockwise airflow channels and 10 counterclockwise airflow channels. (The flow paths of the two chambers will be introduced in detail in the structural design later.) The compressed air is ejected in a pulsed manner. Usually, the pulse of compressed air ranges from about 3 seconds or less to a longer stop time of more than 60 seconds. According to the properties of the material, it is generally set to clockwise pulse airflow and counterclockwise pulse airflow at intervals.

[0006] Therefore, the mixing process requires compressed air, the silo bottom cone requires special design, and the process and control are relatively complicated.

[0007] In addition, the stability of the existing multi-tube blending silo structure is relatively weak, the vibration effect of the vibrator on each blending tube is different, and leakage is prone to occur. Summary of the Invention

[0008] The purpose of the present invention is to solve the defects and shortcomings in the prior art and to design a gravity blending silo for powder materials.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a gravity blending silo for powder materials, comprising a silo body and a blending component arranged inside the silo body, the top of the blending component is connected to the vibrator through a top connecting structure, and the bottom of the blending component is connected to the blending chamber through a bottom connecting structure, a connecting flange is provided between the blending chamber and the silo body, and an annular channel is formed between the silo body and the blending component at a position above the connecting flange.

[0010] Preferably, the blending assembly includes a central blending tube, and a plurality of central tube feed ports are spirally distributed on the central blending tube.

[0011] Preferably, the cross section of the central tube feed opening is in the shape of a parabola opening downward, and the central tube feed opening is tilted inward from top to bottom.

[0012] Preferably, the blending assembly includes a central blending tube and additional blending tubes arranged on both sides of the central blending tube, and the central blending tube and the additional blending tubes are respectively spirally distributed with a plurality of central tube feed ports and a plurality of additional tube feed ports.

[0013] Preferably, the additional mixing tube is fixedly connected to the central mixing tube via a connecting rib, and an anti-accumulation baffle is provided between the bottom of the additional mixing tube and the central mixing tube.

[0014] Preferably, the cross-sections of the central tube feed inlet and the additional tube feed inlet are both parabolic in shape with the openings facing downward, and the central tube feed inlet and the additional tube feed inlet are both inclined inward from top to bottom.

[0015] Preferably, the top connecting structure includes a top connecting plate arranged on the top of the silo body for connecting the mixing assembly and the vibrator, the vibrator is arranged on the top connecting plate through a clamping ring, and a rubber spacer pad is provided between the clamping ring and the top connecting plate.

[0016] Preferably, the bottom connection structure includes a bottom plate, a supporting rib is provided between the bottom plate and the mixing chamber, and a limiting sleeve and a rubber partition filler are provided between the supporting rib and the mixing assembly.

[0017] After adopting the above technical solution, the gravity blending silo for powder provided by the present invention has the following beneficial effects:

[0018] (1) The central mixing tube of the present invention has a stable and relatively simple structure, which saves equipment investment;

[0019] (2) The special connection structure of the central mixing tube of the present invention enables the central mixing tube to vibrate under the action of the vibrator, helping the powder to enter the central tube, thereby achieving the purpose of powder mixing;

[0020] (3) The present invention adopts gravity mixing, which can achieve the purpose of energy saving and low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of embodiment 1 of the present invention;

[0022] Figure 2 Schematic diagram of the top connection structure of the present invention;

[0023] Figure 3 for Figure 1 Side view of the central tube feed port;

[0024] Figure 4 for Figure 3 Schematic diagram of the structure of the center tube feed port in direction A;

[0025] Figure 5 Schematic diagram of the bottom connection structure of the present invention;

[0026] Figure 6 This is a structural diagram of embodiment 2 of the present invention;

[0027] Figure 7 for Figure 6 Side view of the central tube feed port;

[0028] Figure 8 for Figure 7 Schematic diagram of the B-direction structure of the central tube feed port.

[0029] Among them: vibrator 1, silo body 2, central mixing pipe 3, central pipe feed port 4, bottom connecting structure 5, mixing chamber 6, connecting flange 7, annular channel 8, anti-accumulation baffle 9, additional mixing pipe 10, connecting rib plate 11, additional pipe feed port 12, top connecting plate 13, clamping ring 14, rubber diaphragm pad 15, bottom plate 16, supporting rib plate 17, limiting sleeve 18, rubber diaphragm filler 19. DETAILED DESCRIPTION

[0030] The present invention will be further described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only some, not all, of the embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention, its application, or use. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0033] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] Example 1

[0037] This embodiment is a gravity mixing silo for powder materials, which is used for powder silos with a capacity of less than 100 cubic meters. Figure 1-5 As shown, it includes a silo body 2 and a mixing assembly arranged inside the silo body 2. The top of the mixing assembly is connected to the vibrator 1 through a top connecting structure, and the bottom of the mixing assembly is connected to the mixing chamber 6 through a bottom connecting structure 5. A connecting flange 7 is provided between the mixing chamber 6 and the silo body 2, and an annular channel 8 is formed between the silo body 2 and the mixing assembly at a position above the connecting flange 7.

[0038] In this embodiment, the mixing assembly includes a central mixing tube 3, on which a plurality of central tube feed ports 4 are spirally distributed. The cross-section of the central tube feed port 4 is in the shape of a parabola opening downward, and the central tube feed port 4 is tilted inward from top to bottom. The top connecting structure includes a top connecting plate 13 provided on the top of the silo body 2 for connecting the mixing assembly and the vibrator 1. The vibrator 1 is provided on the top connecting plate 13 through a clamping ring 14, and a rubber diaphragm pad 15 is provided between the clamping ring 14 and the top connecting plate 13. The bottom connecting structure includes a bottom plate 16, a support rib 17 is provided between the bottom plate 16 and the mixing chamber 6, and a limiting sleeve 18 and a rubber diaphragm filler 19 are provided between the support rib 17 and the mixing assembly.

[0039] In this embodiment, under the premise of controlling the area of ​​the annular channel 8, through the vibrator 1 and related connecting structures, powders of different heights mainly enter the central blending tube 3 from the central tube feed port 4 and then enter the blending chamber 6. The powder blender with the central tube structure can realize the function of powder blending.

[0040] Through the structural design of the mixing assembly, this embodiment can make powders of different batches and different physical properties flow into the mixing tube and the mixing chamber at the bottom at the same time, and at the same time overcome the stratification of coarse and fine powders formed in the falling process due to gravity; through the spiral distribution design of the feed port on the mixing tube, coarse powder and fine powder of different heights can fall into the mixing tube and the mixing chamber at the same time. The purpose of this is to increase the mixing efficiency of the device and make the feeding more uniform when the powder falls in batches; through the design of the top connecting structure and the bottom connecting structure, good stability and sealing between the silo body and the mixing assembly can be guaranteed.

[0041] Example 2

[0042] This embodiment is a gravity mixing silo for powder materials, which is used for powder silos larger than 100 cubic meters. Figure 6-8 As shown, the structure is basically the same as that of Example 1, except that the mixing assembly includes a central mixing tube 3 and additional mixing tubes 10 arranged on both sides of the central mixing tube 3, and a plurality of central tube feed ports 4 and a plurality of additional tube feed ports 12 are spirally distributed on the central mixing tube 3 and the additional mixing tube 10, respectively. The additional mixing tube 10 is fixedly connected to the central mixing tube 3 by a connecting rib 11, and an anti-accumulation baffle 9 is provided between the bottom of the additional mixing tube 10 and the central mixing tube 3. The cross-sections of the central tube feed port 4 and the additional tube feed port 12 are both parabolic with the opening downward, and the central tube feed port 4 and the additional tube feed port 12 are both inclined inward from top to bottom.

[0043] In this embodiment, under the premise of controlling the area of ​​the annular channel 8, through the vibrator 1 and the related connection structure, powders of different heights mainly enter the central mixing tube 3 and the additional mixing tube 10 from the central tube feed port 4 and the additional tube feed port 12, and finally enter the mixing chamber 6, thereby realizing the function of powder mixing.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A gravity blending silo for powder materials, characterized by: The invention comprises a silo body (2) and a mixing assembly arranged inside the silo body (2), wherein the mixing assembly is connected to a vibrator (1) via a top connecting structure at the top, and is connected to a mixing chamber (6) via a bottom connecting structure (5) at the bottom, a connecting flange (7) is provided between the mixing chamber (6) and the silo body (2), and an annular channel (8) is formed between the silo body (2) and the mixing assembly at a position above the connecting flange (7), and the mixing assembly comprises a central mixing tube (3) and additional mixing tubes ( 10), a plurality of central tube feed ports (4) and a plurality of additional tube feed ports (12) are spirally distributed on the central mixing tube (3) and the additional mixing tube (10), the cross section of the central tube feed port (4) is in a parabolic shape with an opening facing downward, and the central tube feed port (4) is tilted inward from top to bottom, the bottom connection structure (5) includes a bottom plate (16), a supporting rib (17) is provided between the bottom plate (16) and the mixing chamber (6), and a limiting sleeve (18) and a rubber diaphragm filler (19) are provided between the supporting rib (17) and the mixing assembly.

2. A gravity blending silo for powder materials according to claim 1, characterized in that: The additional mixing tube (10) and the central mixing tube (3) are fixedly connected via a connecting rib (11), and an anti-accumulation baffle (9) is provided between the bottom of the additional mixing tube (10) and the central mixing tube (3).

3. The gravity blending silo for powder materials according to claim 1, characterized in that: The cross-sections of the central tube feed inlet (4) and the additional tube feed inlet (12) are both parabolic in shape with the opening facing downward, and the central tube feed inlet (4) and the additional tube feed inlet (12) are both arranged to be inclined inward from top to bottom.

4. The gravity blending silo for powder materials according to claim 1, characterized in that: The top connection structure comprises a top connection plate (13) arranged on the top of the silo body (2) for connecting the blending assembly and the vibrator (1); the vibrator (1) is arranged on the top connection plate (13) via a clamping ring (14); and a rubber diaphragm pad (15) is provided between the clamping ring (14) and the top connection plate (13).

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