A homogenizing and distributing stock bin suitable for grinding high-fineness materials and a working method

Abstract

The application belongs to the technical field of stable material bin, and particularly relates to a homogenizing and distributing stable material bin suitable for grinding high-fineness material and a working method thereof, which comprises a roller press stable material bin body, a distributing device and a rotary multi-channel distributing device; the distributing device is arranged on the top of the stable material bin body and comprises an inlet chute and a distributing chute uniformly distributed on the bottom of the inlet chute; material enters the distributing chute through the inlet chute and then enters the rotary multi-channel distributing device below the distributing device; the rotary multi-channel distributing device rotates at a uniform speed along the circumferential direction of the interior of the stable material bin body under the drive of a power structure, and uniformly distributes the material from the distributing device on the entire horizontal section of the stable material bin during the rotation process. The application realizes homogenizing and distributing of the material by using the rotary multi-channel distributing device, and ensures that the particle size distribution of the material in the bin is uniform; the roller press stable material bin adopts annular gradient distribution in the entire horizontal section, which effectively avoids the segregation of the material in the bin.

Description

Technical Field

[0001] This patent relates to the field of material silo technology, specifically to a homogenized material distribution and stabilizing silo suitable for grinding fine materials and its working method. Background Technology

[0002] Roller presses are a type of high-efficiency and energy-saving grinding equipment. They adopt the advanced material layer grinding principle, which can form many micro-cracks inside the un-crushed particles while crushing the material, thereby improving the grindability of the material. Therefore, they are widely used in raw material and cement grinding.

[0003] In the grinding process of raw materials and cement, the materials need to be repeatedly circulated and extruded by a roller press to form the final product. The higher the fineness index of the finished product, the more times the material circulates in the roller press. The circulating material with a high fine powder content is mixed with the new feed and then fed back into the roller press for extrusion. To ensure the continuity and stability of the feeding into the roller press, a stabilizing hopper is usually set up in conjunction with the roller press. In actual production, the particle size distribution of the material discharged from the stabilizing hopper along the width direction of the roller press has a significant impact on the operational stability of the roller press.

[0004] On the one hand, the relative sliding of materials on the conical material surface causes material segregation. On the other hand, the simultaneous entry of newly fed materials and multiple streams of circulating materials with different fine powder contents into the stabilizing silo without pre-mixing results in uneven particle size distribution throughout the silo. This leads to inconsistent particle size distribution along the width of the roller press in the discharge section. Because fine materials have better flowability and pass through the roller gap faster, for a given amount of material per unit time, the roller gap width on the fine material side is smaller than that on the coarse material side, causing roller misalignment. This roller misalignment problem caused by uneven particle size distribution in the roller press not only reduces the grinding efficiency of the roller press but also easily leads to uneven wear of the roller surface, shaft tilting and axial movement, and other problems, affecting the service life of the equipment.

[0005] In summary, the problems with existing technologies are:

[0006] The traditional roller press's single, fixed, and centrally fed hopper design can easily cause material segregation within the hopper, affecting the roller press's efficient and stable operation. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a homogenizing and stabilizing hopper and its working method suitable for grinding fine materials. This method is used to adjust the distribution of materials in the hopper and into the roller press, effectively avoiding and adjusting roller misalignment, ensuring efficient and stable operation of the roller press, extending its service life, and reducing equipment maintenance costs.

[0008] To achieve the above objectives, the present invention provides a homogenizing material distribution and stabilizing bin suitable for grinding fine materials and a working method thereof. The stabilizing bin is equipped with a rotary multi-channel material distribution device, and adopts a horizontal cross-section full-range annular gradient material distribution method to adjust the material distribution in the roller press stabilizing bin.

[0009] This invention is achieved through the following technical solution:

[0010] A homogenizing and stabilizing silo suitable for grinding fine materials includes a silo body, a material distribution device, and a rotary multi-channel material distribution device.

[0011] The material distribution device is located at the top of the material silo body and includes a feed chute and a distribution chute evenly distributed at the bottom of the feed chute. The material enters the distribution chute through the feed chute and then enters the rotary multi-channel material distribution device located below the material distribution device.

[0012] Driven by a power structure, the rotary multi-channel material distribution device rotates at a constant speed along the circumference inside the material silo, and during the rotation, it evenly distributes the material from the distribution device across the entire horizontal cross-section of the material silo.

[0013] Furthermore, the rotary multi-channel material distribution device includes a power structure, a top plate, and multiple inclined guide troughs; the tops of the guide troughs are evenly distributed on the outer periphery of the top plate, and the bottoms correspond to different areas between the center of the material silo and the inner wall; the center of the top plate is connected to the power structure so as to drive the guide troughs to rotate uniformly around the center of the material silo on the top of the silo.

[0014] Furthermore, the rotary multi-channel fabric distribution device also includes a slide rail, rollers, and a connecting rod; the slide rail is a circular track fixed inside the bin, and multiple rollers are evenly distributed on the slide rail; the top plate is fixed to the center of the rollers through the connecting rod, so that the rollers rotate when the top plate rotates with the guide chute.

[0015] Furthermore, each of the aforementioned guide troughs includes a guide trough body and a discharge trough located at the bottom of the guide trough body; the discharge trough is offset to one side of the guide trough body; all distributing chutes are inclined and their bottoms face the guide trough body, and the material enters the guide trough body and the discharge trough through the distributing chutes and falls into the designated area within the silo.

[0016] Furthermore, the length of the guide chute body varies for different material dropping areas; the closer the ring is to the outer side of the hopper, the longer the corresponding guide chute body; the closer the ring is to the center of the hopper, the shorter the corresponding guide chute body.

[0017] Furthermore, the top plate has a square structure, and the number of the material guide channels is 4N, which are divided into four groups and fixed around the top plate; where N is an integer ≥1.

[0018] Furthermore, the same material feeding area is supplied by two guide chutes.

[0019] Furthermore, the width of the two adjacent guide trough bodies located at the four corners of the top plate extends outward until they are in contact with the side walls of the adjacent guide trough bodies, so that all the material falls into the inside of the guide trough.

[0020] This invention also discloses a working method for the above-mentioned homogenizing and stabilizing silo suitable for grinding fine materials, the steps of which include:

[0021] S1. The material to be ground enters the distribution chute through the feed chute;

[0022] S2. Then, the material is evenly distributed into each rotating guide trough via the material distribution chute.

[0023] S3. The material to be ground moves obliquely downward along the main body of the feed chute and is distributed in the horizontal section of the material silo through the discharge chute.

[0024] The advantages and technical effects of this invention are as follows:

[0025] This invention utilizes a rotary multi-channel material distribution device to achieve uniform material distribution, ensuring consistent particle size distribution throughout the silo; and employs a roller press to stabilize the silo with a full-range annular gradient material distribution across the horizontal cross-section, effectively preventing material segregation within the silo. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the material silo of the present invention;

[0027] Figure 2 This is a schematic diagram of the material distribution device and the rotary multi-channel material distribution device of the present invention;

[0028] Figure 3 This is a schematic diagram of the top structure of the rotary multi-channel fabric feeding device of the present invention;

[0029] Figure 4 This is a schematic diagram of the material guide channel structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the full-range gradient annular material receiving method of the horizontal cross-section of the roller press stabilizing hopper according to the present invention;

[0031] Figure 6 for Figure 5 Top view.

[0032] In the diagram: 11. Material stabilizing silo cylinder; 12. Material stabilizing silo cone; 13. Cylinder support; 2. Rotary multi-channel material distribution device; 21. Variable frequency motor; 22. Reducer; 221. Reducer output shaft; 222. Flange; 23. Slide rail; 24. Roller; 25. Connecting rod; 26. Guide chute; 261. Top plate; 262. Top plate reinforcing rib; 3. Material pre-pressurization device; 4. Feed chute; 5. Distributing chute; 6. Manhole; 7. Dust collection port; 8. Discharge port; 9. Silo top reinforcing rib. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this patent.

[0034] like Figures 1-6 As shown, the present invention discloses a homogenizing and stabilizing silo suitable for grinding fine materials, including a silo body, a material distribution device on the top of the silo, a rotary multi-channel material distribution device 2, and a material pre-pressurization device 3 on the bottom of the silo; the material to be ground is uniformly dispersed into the silo body 1 of the roller press by the material distribution device and the rotary multi-channel material distribution device 2, and then fed into the roller press at the bottom of the silo after being squeezed and vented by the material pre-pressurization device 3. At the same time, a certain material level is maintained in the silo to ensure the stable operation of the roller press.

[0035] like Figure 1 As shown, the top of the material silo is equipped with a manhole door 6 to facilitate observation of the inside of the silo and the entry and exit of maintenance personnel. At the same time, a dust collection hole 7 is provided to promptly remove dust from the silo. Several silo top reinforcing ribs 9 are arranged in a cross shape on the upper surface of the silo top to ensure that the load-bearing positions of the device have sufficient strength.

[0036] The material silo body includes a material silo cylinder 11, a material silo cone 12, and a cylinder support 13. The material silo cylinder 11 is located at the upper end of the material silo body. The cylinder support 13 is provided on the lower outer wall of the material silo cylinder 11 for fixing and supporting the material silo. The material silo cone 12 provided at the lower end of the material silo cylinder 11 facilitates the conveying of the uniformly dispersed material to be ground to the opening of the material pre-pressurization device 3.

[0037] like Figures 2-4 As shown, the rotary multi-channel material distribution device 2 includes a variable frequency motor 21, a reducer 22, a top plate 261, and material guide troughs 26. The 16 material guide troughs 26 are divided into four groups, with their tops evenly distributed side-by-side around the square top plate 261. The bottoms of the material guide troughs 26 correspond to different areas between the center of the material silo and its inner wall.

[0038] Meanwhile, the center of the upper surface of the top plate 261 is bolted to the flange 222 on the output shaft 221 of the reducer; several top plate reinforcing ribs 262 are evenly arranged on the lower surface of the top plate 261 to ensure that the position has sufficient strength. During operation, the variable frequency motor 21 drives the reducer 22 at a suitable speed to drive the guide chute 26 to make uniform circular motion around the vertical center line on the top of the bin;

[0039] The rotary multi-channel feeding device 2 also includes a slide rail 23, rollers 24, and connecting rods 25. The slide rail 23 is a circular track fixed inside the hopper, and multiple rollers 24 are evenly distributed on the slide rail. The outer periphery of the top plate 261 is fixedly connected to the vertical end of multiple right-angle connecting rods 25, and the horizontal end of the connecting rods 25 is fixed to the center of the rollers 24. That is, when the top plate 261 and the guide chute 26 rotate, they can drive the rollers 24 to rotate. The slide rail 23 provides a vertical upward pulling force to the top plate 261 through the connecting rods, reducing the connection load between the top plate 261 and the reducer output shaft 221. On the other hand, the rolling cooperation between the rollers 24 and the slide rail 23 reduces the rotational resistance of the top plate 261 and the guide chute 26 under material impact, and reduces the driving resistance of the variable frequency motor 21.

[0040] Preferably, the material distribution device includes a feed chute 4 and distribution chutes 5 evenly distributed around the bottom of the feed chute 4. All distribution chutes 5 are inclined and their bottoms face the four sets of guide troughs 26, so that the material can enter the guide troughs 26 through the feed chute 4 and the distribution chutes 5.

[0041] Preferably, each of the feeding troughs 26 includes a feeding trough body and a discharge trough; the material to be ground randomly falls into the feeding trough body of each feeding trough 26 at 5 / 4 of the distribution chute, and then moves obliquely downward along the feeding trough 26 by gravity, with the angle between the material movement direction and the horizontal direction being ≥45° to ensure smooth material movement; such as Figure 5 As shown, the horizontal cross-section of the material silo is divided into eight concentric annular discharge areas according to the number of guide troughs 26 (the number of concentric annular discharge areas can be different depending on the specifications of the material silo). Ultimately, the discharge channels of every two guide troughs 26 are aligned with the same annular discharge area, thus ensuring that the rotating guide troughs 26 can stably supply material to the entire horizontal cross-section of the material silo. Preferably, the two guide troughs 26 corresponding to the same discharge area should be spaced as far apart as possible to ensure uniform material discharge. More preferably, since the material needs to be evenly distributed to the eight annular discharge areas on the horizontal cross-section of the material silo, the guide trough body is designed with different lengths depending on the corresponding discharge area; the closer the annulus is to the outer edge of the silo, the longer its corresponding guide trough body; the closer the annulus is to the center of the silo, the shorter its corresponding guide trough body.

[0042] In a further preferred embodiment, to facilitate the movement of materials, the angle between the guide chute body and the horizontal direction is 45°, the angle between the discharge chute and the horizontal direction is 45°, and the discharge chute and the guide chute body are not on the same straight line. The discharge chute is deflected to one side of the guide chute body to ensure that the material discharged from the discharge chute falls accurately into the corresponding area of ​​the stabilizing silo.

[0043] like Figure 5 As shown, the amount of material fed into each annular material dropping area is determined by the area swept by the material distribution chute 5 above the corresponding guide chute 26. The variable frequency motor 21 drives the guide chute 26 to rotate at a uniform speed, and the material in the material distribution chute 5 is evenly fed into each guide chute 26, thus ensuring that the amount of material received per unit time in each annular material dropping area is consistent. The closer the receiving area is to the center of the bin, the smaller the horizontal cross-sectional area, and the larger the amount of material received per unit area, forming a gradient feeding in each area. This is in line with the process characteristics of fast material discharge in the middle of the stabilizing bin and slow material discharge at the edge during actual production. The multiple streams of material fed into the stabilizing bin of the roller press through the discharge chute of the guide chute 26 fall randomly into various places in the stabilizing bin in a gradient feeding manner, realizing uniform material receiving across the entire horizontal cross-section of the stabilizing bin of the roller press and pre-homogenization of the material entering the bin. Preferably, the discharge trough of each guide trough 26 is normally 200mm wide. The discharge trough size can be flexibly designed according to the throughput of the roller press and the horizontal cross-sectional area of ​​the stabilizing silo, and the feeding gradient can be adjusted according to actual industrial needs. When the material receiving amount of the guide trough 26 is consistent, the wider the discharge trough size, the larger the area of ​​the corresponding ring falling into the silo, and the smaller the material receiving amount per unit area; conversely, the larger the material receiving amount per unit area. When the stabilizing silo specifications are fixed, when the throughput of the roller press is large, the material at the center of the silo falls quickly, so the size of the discharge trough corresponding to the center of the silo can be narrowed, and the size of the discharge trough on the outside can be narrowed. When the throughput of the roller press is small, the material at the center of the silo falls slowly, so the size of the discharge trough corresponding to the center of the silo can be widened, and the size of the discharge trough on the outside can be widened. The above methods ensure that the material in the stabilizing silo can always be kept on a horizontal plane, avoiding the formation of a conical material surface due to the inconsistent descent speed of the material in different parts of the silo, and preventing segregation caused by the relative rolling of the material, thus ensuring the uniformity of the particle size of the material entering the silver press. like Figure 6 As shown, in a further preferred embodiment, the material is randomly and evenly dropped into the circular material dropping area at 5 / 4 of the distribution chute. To ensure that all the material falls into the guide chute 26, the width of the 8 guide chute bodies located at the four corners of the top plate 261 needs to be extended outward until the side walls of the adjacent guide chute bodies are all in contact, so that all the material can fall into the guide chute 26.

[0044] This invention also discloses the above-mentioned method for operating a homogenizing and stabilizing silo suitable for grinding fine materials, the steps of which include:

[0045] The material to be ground falls evenly into the rotating guide troughs 26 sequentially through the feed chute 4 and the distribution chute 5. Then, it moves obliquely downwards along the guide trough body under gravity. Finally, the material in each guide trough 26 is fed into eight non-overlapping concentric annular feeding areas on the horizontal cross-section of the roller press's stabilizing bin. Each pair of guide troughs corresponds to one annular feeding area. The closer the receiving area is to the center of the bin, the smaller its horizontal cross-sectional area, resulting in a larger material reception per unit area. This creates a gradient feeding pattern, which is adapted to the actual production process where the material discharge speed is fast in the center of the stabilizing bin and slow at the edges. This achieves uniform material reception across the entire horizontal cross-section of the roller press's stabilizing bin and pre-homogenization of the incoming material. The dimensions of the discharge troughs in each guide trough 26 can be flexibly designed according to the roller press's throughput and the horizontal cross-sectional area of ​​the stabilizing bin, and the feeding gradient can be adjusted according to actual industrial needs.

[0046] The material silo of this invention provides the roller press with a continuous, uniformly sized material with a certain pressure and density, enabling the roller press to work efficiently and stably.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A homogenizing and stabilizing silo suitable for grinding fine materials, comprising a silo body, characterized in that: It also includes a material distribution device and a rotary multi-channel material distribution device; The material distribution device is located at the top of the material silo body and includes a feed chute and a distribution chute evenly distributed at the bottom of the feed chute. The material enters the distribution chute through the feed chute and then enters the rotary multi-channel material distribution device located below the material distribution device. The rotary multi-channel material distribution device includes a power structure, a top plate, and multiple inclined guide troughs. The tops of the guide troughs are evenly distributed on the outer periphery of the top plate, and the bottoms correspond to different areas between the center of the material silo and the inner wall. Driven by the power structure, the rotary multi-channel material distribution device rotates at a uniform speed along the circumference inside the material silo, and during the rotation, it evenly distributes the material from the distribution device on the entire horizontal cross-section of the material silo. Each of the aforementioned feed troughs includes a feed trough body and a discharge trough located at the bottom of the feed trough body; the discharge trough is offset to one side of the feed trough body; the length of the feed trough body varies corresponding to different material dropping areas; multiple streams of material fed into the roller press stabilizing bin via the discharge trough of the feed trough fall randomly into various locations within the stabilizing bin in a gradient feeding manner, achieving uniform material receiving across the entire horizontal cross-section of the roller press stabilizing bin and pre-homogenization of the incoming material, ensuring consistent particle size distribution at all points within the bin; the size of the discharge trough is designed according to the roller press throughput and the horizontal cross-sectional area of ​​the stabilizing bin, so that the material within the stabilizing bin can always be kept on a horizontal plane, avoiding the formation of a conical material surface due to inconsistent material descent speeds at various points within the bin, and preventing segregation caused by relative rolling of the material; The angle between the material movement direction and the horizontal direction is ≥45°; the closer the receiving area is to the center of the silo, the smaller the horizontal cross-sectional area, and the greater the amount of material received per unit area, forming a gradient feeding in each area.

2. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 1, characterized in that: The top plate is connected to the power structure at its center so as to drive the guide chute to rotate at a constant speed around the center of the stable material silo on the top of the silo.

3. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 2, characterized in that: The rotary multi-channel fabric distribution device also includes a slide rail, rollers, and a connecting rod; the slide rail is a circular track fixed inside the bin, and multiple rollers are evenly distributed on the slide rail; the top plate is fixed to the center of the rollers through the connecting rod, so that the rollers rotate when the top plate rotates with the guide chute.

4. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 2, characterized in that: All material distribution chutes are inclined and their bottoms face the main body of the guide trough. The material enters the main body of the guide trough and the discharge trough through the material distribution chutes and falls into the designated area inside the silo.

5. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 4, characterized in that: The length of the guide chute body varies depending on the material dropping area; the closer the ring is to the outer edge of the hopper, the longer the corresponding guide chute body; the closer the ring is to the center of the hopper, the shorter the corresponding guide chute body.

6. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 2, characterized in that: The top plate has a square structure, and there are 4N material guide channels, which are divided into four groups and fixed around the top plate; where N is an integer ≥1.

7. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 6, characterized in that: The same material feeding area is supplied by two guide chutes.

8. The homogenizing and stabilizing silo suitable for grinding fine materials as described in claim 6, characterized in that: The width of the two adjacent guide troughs located at the four corners of the top plate extends outward until they are in contact with the side walls of the adjacent guide troughs so that all the material falls into the guide trough.

9. The working method of the homogenizing and stabilizing silo suitable for grinding fine materials as described in any one of claims 1 to 8, characterized in that: The steps include: S1. The material to be ground enters the distribution chute through the feed chute; S2. The material is evenly fed into each rotating guide trough body through the material distribution chute; S3. The material to be ground is evenly distributed in the horizontal section of the material silo through the discharge chute.

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