Device for detecting material segregation and detection method

Abstract

The invention discloses a device for detecting material segregation and a detection method, and belongs to the field of material treatment. The device comprises a support, a discharging assembly is fixedly installed at the top of the support, a rotary material distribution assembly is installed at a discharging opening of the discharging assembly and used for rotatably throwing materials, a weighing bin is arranged in the center of the support and located below the rotary material distribution assembly, and the weighing bin is located below the rotary material distribution assembly. The bottom of the weighing bin is open and is fixedly connected with a collecting pipe, the bottom of the collecting pipe is sealed, the collecting pipe extends in the material falling direction, and the collecting pipe can be divided into a plurality of rectangular pipes with the same size; the particle sizes of materials in each layer of rectangular pipe are screened, the proportion of the materials with different particle sizes is judged, whether the particle size grading condition in the materials meets the optimal proportion or not is further analyzed, the distribution condition of large and small materials at each section of the collecting pipe is scanned, the rotating speed of the rotary material distributing assembly is adjusted, and therefore the problem of material segregation in the weighing bin is solved.

Description

Technical Field

[0001] This invention relates to the field of material handling technology, and specifically to an apparatus and method for detecting material segregation. Background Technology

[0002] Currently, in existing roller press grinding systems, a weighing bin is installed at the top of the roller press. This weighing bin has multiple feed inlets to store unsorted particles and fresh feed material, enabling continuous feeding of the roller press. Compared to the fresh feed material, the unsorted particles in the classifier are relatively smaller. If they are not mixed evenly with the fresh feed, material segregation is likely to occur after entering the weighing bin. Secondly, the straight pipe between the weighing bin and the roller press accelerates material segregation, making it more severe when the material enters the roller press. This results in excessive deviation between the left and right roller gaps, directly affecting the extrusion effect of the roller press, causing a decrease in roller press current and an increase in elevator current. Furthermore, material segregation leads to frequent pressurization and depressurization of the hydraulic system, increasing the replacement rate of valves in the hydraulic system; the rollers generate large axial forces, and these alternating axial forces pose a significant challenge to bearing life; simultaneously, it causes uneven wear of the roller press's wear-resistant layer, reducing the service life of the roller press's roller surface. To alleviate segregation problems, existing technologies mostly focus on optimizing the silo structure, such as adding baffles, changing the silo's taper, or adjusting the feeding method, such as reducing the feeding height or using multi-point material distribution. However, these solutions are mostly based on experience-based design, and traditional experimental devices make it difficult to visually observe the material stratification process within the silo and identify the key points where segregation occurs. On the other hand, existing detection methods mostly rely on post-event sampling analysis of the discharged material, which cannot obtain real-time material distribution data in different areas within the silo, making it difficult to quantify the degree of segregation. This results in insufficient targeting of optimization solutions and unstable anti-segregation effects.

[0003] Therefore, there is an urgent need for a device and detection method that can intuitively observe the segregation process, accurately quantify the degree of segregation, and optimize feed parameters in a targeted manner to solve the problem of material segregation in traditional weighing bins. Summary of the Invention

[0004] The present invention aims to solve the technical problem of the inability to obtain material distribution data in different areas of the warehouse, making it difficult to quantify the degree of segregation.

[0005] To overcome the above-mentioned technical problems, the present invention provides a device for detecting material segregation, including a support frame, a feeding assembly fixedly installed on the top of the support frame, a rotating cloth assembly installed at the feeding port of the feeding assembly for rotating and scattering the material, a weighing chamber located at the center of the support frame below the rotating cloth assembly, a collection pipe fixedly connected to the bottom of the weighing chamber, the bottom of the collection pipe being sealed and extending along the direction of material descent, and the weighing chamber and the collection pipe being made of transparent material.

[0006] As a further aspect of the present invention: the feeding assembly includes a conical hopper, a partition is provided in the middle of the conical hopper to divide the internal space of the conical hopper into two independent areas for placing materials of different colors and particle sizes, and a pull-out first insert plate and a second insert plate are provided laterally on both sides of the bottom of the conical hopper.

[0007] As a further embodiment of the present invention: the rotating fabric assembly includes a motor and a base. The motor is fixedly mounted on the top of the bracket. A support plate is fixedly connected in the middle of the bracket. The base is fixedly connected on the support plate. A feed straight pipe is rotatably connected to the center of the base through a bearing. A discharge inclined pipe is fixedly connected to the bottom of the feed straight pipe. A driven wheel is provided on the feed straight pipe. A driving wheel is provided on the output shaft of the motor. The driving wheel and the driven wheel are driven by a transmission belt.

[0008] As a further aspect of the present invention: a fixing plate is fixedly connected to both sides of the bracket, and a weighing device is provided on the fixing plate. The load-bearing surface of the weighing device is facing upward and is tightly fitted to the bottom outer wall of the weighing chamber.

[0009] As a further aspect of the present invention: the discharge port extends into the feed straight pipe and fits against the inner wall of the feed straight pipe.

[0010] As a further aspect of the present invention: the discharge inclined tube has an oblique opening and extends completely into the weighing chamber.

[0011] As a further aspect of the present invention, the transparent material is a PE board or glass.

[0012] As a further aspect of the present invention, the collection tube can be divided into multiple rectangular tubes of the same size.

[0013] As a further aspect of the present invention, the bottom of the weighing chamber is provided with a pull-out third insert.

[0014] The present invention also provides a detection method for an apparatus for detecting material segregation, comprising the following steps: Step 1: Place the large-diameter and small-diameter materials of different colors into the two areas separated by the partition of the feeding assembly, open the first and second insert plates, and let the materials fall into the rotating cloth assembly; Step 2: Start the motor of the rotating fabric assembly, which drives the feed straight pipe and the discharge inclined pipe to rotate through the transmission belt, so that the material is rotated and scattered around the center line of the weighing bin and falls into the weighing bin. Step 3: After the material in the weighing bin has accumulated to the preset height, open the third insert plate at the bottom of the weighing bin to allow the material to enter the collection pipe; observe the material distribution in each layer through the visual rectangular tube, and then disassemble the visual rectangular tubes of each layer to collect the material in each layer. Step 4: Screen the collected material in each layer, count the mass ratio of large-diameter material to small-diameter material in each layer, and analyze whether the particle size distribution in the material meets the optimal ratio. If it does, proceed to the next step. If it does not, adjust the opening degree of the first or second insert plate according to the optimal ratio, and repeat steps 1-3 until the optimal ratio is met. Step 5: By scanning the distribution of particle size at each cross section of the collection tube, determine the uniformity of material accumulation and the degree of segregation at different heights in the weighing bin; based on the uniformity of particle size distribution, adjust the motor speed of the rotating material distribution assembly, change the rotation speed of the discharge inclined tube, and repeat steps 2-4 until there is no segregation of material in the weighing bin.

[0015] The present invention provides an apparatus for detecting material segregation, which has at least the following beneficial effects: 1. Material enters the rotating fabric distribution assembly through the discharge port at the bottom of the feeding assembly. The rotating fabric distribution assembly throws the material in all directions, which can improve the uniformity of material distribution and avoid material segregation. There is a weighing bin at the bottom of the rotating fabric distribution assembly to collect the material and weigh the falling material. The weight change in the weighing bin reflects the stability of the rotating fabric distribution assembly and avoids other factors affecting the analysis of material segregation. The material in the weighing bin enters the collection pipe. Since the collection pipe is made of transparent material, the material distribution in the cross section of the collection pipe can be seen, which facilitates the analysis of the uniformity of material accumulation at different heights in the weighing bin and the degree of material segregation. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the feeding assembly in this invention; Figure 4 This is a schematic diagram of the rotating fabric assembly in this invention.

[0018] In the diagram: 1. Support frame; 2. Feeding assembly; 201. Conical hopper; 202. Feeding port; 203. Partition plate; 204. First insert plate; 205. Second insert plate; 3. Rotating fabric feeding assembly; 301. Motor; 302. Base; 303. Support plate; 304. Feeding straight pipe; 305. Discharge inclined pipe; 306. Drive wheel; 307. Driven wheel; 308. Transmission belt; 4. Weighing bin; 5. Collection pipe; 6. Rectangular tube; 7. Third insert plate; 8. Fixing plate; 9. Weighing device. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-4 As shown, an embodiment of the present invention provides a device for detecting material segregation, comprising a support 1, a feeding assembly 2 fixedly mounted on the top of the support 1, a rotating cloth assembly 3 mounted on the feeding port 202 of the feeding assembly 2 for receiving the material from the feeding port 202 and rotating and scattering the material in all directions, a weighing chamber 4 located at the center of the support 1 below the rotating cloth assembly 3 for receiving the material scattered and falling from the rotating cloth assembly 3, a collection tube 5 fixedly connected to the bottom opening of the weighing chamber 4, the bottom of the collection tube 5 being sealed and extending along the direction of material falling, the collection tube 5 being divisible into multiple rectangular tubes 6 of the same size, adjacent rectangular tubes 6 being fixed with convex and concave grooves for easy disassembly, and material samples can be obtained from each layer of rectangular tubes 6 by disassembling the rectangular tubes 6, these samples directly corresponding to the material distribution at different heights in the weighing chamber 4.

[0021] The feeding assembly 2 includes a conical hopper 201, with a partition 203 in the middle of the conical hopper 201, which divides the internal space of the conical hopper 201 into two independent areas for placing materials of different colors and particle sizes. The different colors are for easy differentiation of materials of different particle sizes. The bottom sides of the conical hopper 201 are horizontally provided with a pull-out first insert plate 204 and a second insert plate 205. The first insert plate 204 and the second insert plate 205 are pulled outward from the left and right sides respectively to control the feeding amount of different areas on both sides of the feeding assembly 2.

[0022] The rotating fabric assembly 3 includes a motor 301 and a base 302. The motor 301 is fixedly installed on the top of the bracket 1. A support plate 303 is fixedly connected in the middle of the bracket 1. The base 302 is fixedly connected on the support plate 303. A feed straight pipe 304 is rotatably connected to the center of the base 302 through a bearing. A discharge inclined pipe 305 is fixedly connected to the bottom of the feed straight pipe 304. A driven wheel 307 is provided on the feed straight pipe 304. A driving wheel 306 is provided on the output shaft of the motor 301. The driving wheel 306 and the driven wheel 307 are driven by a transmission belt 308. The discharge port 202 extends into the feed straight pipe 304 and fits against the inner wall of the feed straight pipe 304. The body of the discharge inclined pipe 305 opens obliquely and extends completely into the weighing chamber 4. Both sides of the support frame 1 are fixedly connected to fixed plates 8, and weighing devices 9 are installed on the fixed plates 8. The load-bearing surface of the weighing devices 9 is facing upwards and is tightly fitted to the bottom outer wall of the weighing chamber 4. The specific structure of the weighing devices 9 is existing technology. Both weighing devices 9 are connected to a computer via data connection cables to transmit their respective weighing data in real time. The computer can automatically calculate the weight difference and average weight of the two weighing devices 9, and generate a weight change curve. If there is no segregation of the material in the weighing chamber 4 and the particle size is uniformly distributed, the weight borne by the two weighing devices should be basically the same. If segregation occurs, such as large particles clustering on one side and small particles clustering on the other side, the weight distribution on both sides will be unbalanced, and the weight on both sides will increase significantly. The change in weight on both sides can be used to judge in real time whether segregation has occurred and its severity. The bottom of the weighing chamber 4 is equipped with a pull-out third insert plate 7 for weighing. After the material in bin 4 accumulates to the preset height, the third insert plate 7 at the bottom of the weighing bin 4 is opened. The weighing bin 4 and the collection pipe 5 are made of transparent material, such as PE board or glass. Therefore, the distribution of different colored materials in the weighing bin 4 and the collection pipe 5 can be observed visually. By screening the particle size of the material in each layer of rectangular tube 6, the proportion of different particle sizes can be determined, and the particle size distribution in the material can be analyzed to see if it meets the optimal ratio, and effective adjustments can be made. It should be noted that if the initial particle size distribution of the material itself does not meet the optimal ratio, even if there is no segregation, if the ratio of large and small particles in the material does not meet the process requirements, such as too much large particle size and insufficient small particle size, the material cannot be evenly distributed, which will affect the analysis of the degree of segregation in the weighing bin 4 and will not be able to provide qualified feed for the subsequent roller press.

[0023] By scanning the distribution of materials of different sizes at each cross section of the collection pipe 5, the distribution status of materials of different sizes in the collection pipe 5 is determined. Based on the uniformity of the distribution of materials of different sizes, the rotating material distribution assembly 3 is adjusted to solve the problem of material segregation in the weighing chamber 4.

[0024] Another embodiment of the present invention provides a detection method for an apparatus for detecting material segregation, comprising the following steps: Step 1: Place the large-diameter and small-diameter materials of different colors into the two areas separated by the partition 203 of the feeding assembly 2, open the first insert plate 204 and the second insert plate 205, and let the materials fall into the rotating cloth assembly 3. Step 2: Start the motor 301 of the rotating cloth assembly 3, which drives the feed straight pipe 304 and the discharge inclined pipe 305 to rotate through the transmission belt 308, so that the material is rotated and scattered around the center line of the weighing bin 4 and falls into the weighing bin 4. Step 3: After the material in the weighing bin 4 has accumulated to the preset height, open the third insert plate 7 at the bottom of the weighing bin 4 to allow the material to enter the collection pipe 5; observe the material distribution in each layer through the visual rectangular tube 6, and then disassemble the visual rectangular tube 6 of each layer to collect the material in each layer. Step 4: Screen the collected material in each layer, count the mass ratio of large-diameter material to small-diameter material in each layer, and analyze whether the particle size distribution in the material meets the optimal ratio. If it does, proceed to the next step. If it does not, adjust the opening degree of the first insert plate 204 or the second insert plate 205 according to the optimal ratio, and repeat steps 1-3 until the optimal ratio is met. Step 5: By scanning the distribution of particle size at each cross section of the collection tube 5, determine the uniformity of material accumulation and the degree of segregation at different heights in the weighing bin 4; based on the uniformity of particle size distribution, adjust the speed of motor 301 of the rotating material distribution assembly 3, change the rotation speed of the discharge inclined tube 305, and repeat steps 2-4 until there is no segregation of material in the weighing bin 4.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An apparatus for detecting material segregation, characterized in that, Includes a support (1), on the top of which a feeding assembly (2) is fixedly installed. A rotating cloth assembly (3) is installed at the feeding port (202) of the feeding assembly (2) for rotating and scattering materials. A weighing chamber (4) is set at the center of the support (1). The weighing chamber (4) is located below the rotating cloth assembly (3). A collection pipe (5) is fixedly connected to the bottom opening of the weighing chamber (4). The bottom of the collection pipe (5) is sealed and extends along the direction of material falling. The weighing chamber (4) and the collection pipe (5) are made of transparent material.

2. The apparatus for detecting material segregation according to claim 1, characterized in that, The feeding assembly (2) includes a conical hopper (201), with a partition (203) in the middle of the conical hopper (201) to divide the internal space of the conical hopper (201) into two independent areas for placing materials of different colors and particle sizes. The bottom sides of the conical hopper (201) are provided with a pull-out first insert plate (204) and a second insert plate (205).

3. The apparatus for detecting material segregation according to claim 2, characterized in that, The rotating fabric assembly (3) includes a motor (301) and a base (302). The motor (301) is fixedly installed on the top of the bracket (1). A support plate (303) is fixedly connected in the middle of the bracket (1). The base (302) is fixedly connected on the support plate (303). A feed straight pipe (304) is rotatably connected to the center of the base (302) through a bearing. A discharge inclined pipe (305) is fixedly connected to the bottom of the feed straight pipe (304). A driven wheel (307) is provided on the feed straight pipe (304). A driving wheel (306) is provided on the output shaft of the motor (301). The driving wheel (306) and the driven wheel (307) are driven by a transmission belt (308).

4. The apparatus for detecting material segregation according to claim 1, characterized in that, The bracket (1) is fixedly connected to both sides with a fixed plate, and a weighing device (9) is provided on the fixed plate. The load-bearing surface of the weighing device (9) is facing upward and is tightly fitted to the bottom outer wall of the weighing chamber (4).

5. The apparatus for detecting material segregation according to claim 1, characterized in that, The discharge port (202) extends into the feed straight pipe (304) and fits against the inner wall of the feed straight pipe (304).

6. The apparatus for detecting material segregation according to claim 3, characterized in that, The discharge inclined tube (305) has an oblique opening and extends completely into the weighing chamber (4).

7. The apparatus for detecting material segregation according to claim 1, characterized in that, The transparent material is PE board or glass.

8. The apparatus for detecting material segregation according to claim 3, characterized in that, The collection tube (5) can be divided into multiple rectangular tubes (6) of the same size.

9. The apparatus for detecting material segregation according to claim 8, characterized in that, The bottom of the weighing chamber (4) is provided with a pull-out third insert plate (7).

10. A detection method for the apparatus for detecting material segregation as described in claim 9, characterized in that, Includes the following steps: Step 1: Place the large-diameter and small-diameter materials of different colors into two areas separated by the partition (203) in the feeding assembly (2), open the first insert plate (204) and the second insert plate (205) to let the materials fall into the rotating cloth assembly (3). Step 2: Start the motor (301) of the rotating cloth assembly (3), drive the feed straight pipe (304) and the discharge inclined pipe (305) to rotate through the transmission belt (308), and throw the material around the center line of the weighing bin (4) so ​​that the material falls into the weighing bin (4); Step 3: After the material in the weighing bin (4) has accumulated to the preset height, open the third insert plate (7) at the bottom of the weighing bin (4) to allow the material to enter the collection pipe (5); observe the distribution of the material in each layer through the visual rectangular tube (6), and then disassemble the visual rectangular tube (6) of each layer to collect the material in each layer; Step 4: Screen the collected material in each layer, count the mass ratio of large-diameter material to small-diameter material in each layer, and analyze whether the particle size distribution in the material meets the optimal ratio. If it does, proceed to the next step. If it does not, adjust the opening degree of the first insert plate (204) or the second insert plate (205) according to the optimal ratio, and repeat steps 1-3 until the optimal ratio is met. Step 5: By scanning the distribution of particle size at each cross section of the collection tube (5), determine the uniformity of material accumulation and the degree of segregation at different heights in the weighing bin (4); based on the uniformity of particle size distribution, adjust the speed of the motor (301) of the rotating material distribution assembly (3) and change the rotation speed of the discharge inclined tube (305), repeat steps 2-4 until there is no segregation of material in the weighing bin (4).

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