Coal granularity screening device
By employing an inclined screen body, a gradually changing guide rod diameter, and a pushing mechanism in the coal particle size screening device, the problem of poor adjustment flexibility in existing devices has been solved, achieving precise and rapid coal particle size classification and efficient screening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-03-27
AI Technical Summary
Existing coal particle size analysis and screening devices are difficult to flexibly meet the needs of different coal particle size analysis. The screening particle size range is fixed, the collection accuracy is insufficient, and the adjustment flexibility is poor.
A coal particle size screening device was designed, which adopts an inclined screen body and a vibrating motor, combined with a guide rod diameter gradient design and a pushing mechanism, to achieve orderly classification of coal according to particle size. The particle size classification difference can be adjusted by configuring the number of collection boxes, and the pushing force of guide rollers and levers can be used to avoid jamming and improve screening efficiency.
It enables flexible adjustment according to particle size analysis requirements, improves grading accuracy and screening efficiency, ensures continuous operation and efficient screening, and is suitable for efficient screening of batch samples.
Smart Images
Figure CN121732415A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the present disclosure belongs to the technical field of screening devices, and particularly relates to a coal particle size screening device. BACKGROUND
[0002] At present, the coal particle size analysis screening device is mainly based on the mechanical vibration principle, the coal sample is made to move on the screen surface through driving the screen to vibrate, and the different particle size particles are separated by using the screen with different aperture sizes. Such device usually contains the feeding mechanism, the screening cascade mechanism, the vibration driving mechanism and the material collecting mechanism and other core components, wherein the screening cascade mechanism adopts the structure form of the multi-layer screen superposition, each layer of screen corresponds to a specific aperture size, and is arranged from top to bottom according to the aperture size from large to small or from small to large, so as to complete the particle size grading from coarse to fine or from fine to coarse.
[0003] In actual application, the design of the screening device needs to adapt to the physical characteristics of the coal sample, so as to ensure that the material can fully contact the screen during the vibration process, and the effective separation and grading of the particles are realized.
[0004] The prior art has the following problems: The existing accurate coal particle size analysis screening device has a fixed setting of the screening particle size range, and it is difficult to flexibly meet different coal particle size analysis requirements. The fixed alignment relationship between each discharge hopper and the corresponding level screen is difficult to adapt and adjust according to the actual screening requirements of the coal particles, and the collected coal precision is insufficient and the precision adjustment flexibility is poor. SUMMARY
[0005] The embodiment of the present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a coal particle size screening device.
[0006] The embodiment of the present disclosure provides a coal particle size screening device, which comprises a screen body arranged in an inclined manner and a vibration motor mounted on the opposite two outer side walls of the screen body; a supporting leg is mounted at the corner of the bottom of the screen body, so that the screen body is in an inclined state; an elastic member is connected between the top end of the supporting leg and the screen body, a discharge port is formed in the bottom of the screen body, and a receiving hopper is mounted at the top end of the screen body; a guide plate is fixed at the lower position in the interior of the screen body, and the guide plate corresponds to the receiving hopper; a supporting rod is fixed at the middle position in the interior of the screen body and the end portion away from the guide plate, and the two ends of the supporting rod are fixed to the opposite two inner side walls of the screen body; a plurality of guide rods are arranged in the interior of the screen body and are spaced from each other on the top of the supporting rod, and the guide rods are arranged along the inclined direction of the screen body; a pushing mechanism is further arranged at the top end of the screen body to push the coal on the guide rods, and at least one collecting box corresponding to the discharge port is further arranged at the bottom of the screen body.
[0007] Optionally, the diameter of the guide rod gradually increases from the end closer to the guide plate to the end away from the guide plate.
[0008] Optionally, the diameter of the guide rod increases proportionally from the end closer to the guide plate to the end away from the guide plate.
[0009] Optionally, the guide rod is a conical rod, the elastic element is a spring, and multiple guide rods are arranged at equal intervals.
[0010] Optionally, the pushing mechanism includes a drive motor, a connecting belt, a lever assembly, and two guide rollers; Two guide rollers are mounted inside the screen body along the inclined direction of the screen body and are located above the guide rod. The drive motor is mounted on the outside of the screen body and is coaxially connected to one of the guide rollers. A connecting belt for transmission is sleeved between the two guide rollers. Multiple sets of lever assemblies are spaced apart along the transmission direction of the connecting belt.
[0011] Optionally, each of the lever assemblies includes multiple levers perpendicular to the connecting band, with the first end of each lever fixed to the connecting band and the second end of each lever corresponding to a gap formed between multiple spaced-apart guide rods.
[0012] Optionally, the lever is an elastic rubber rod, and the second end of the lever is configured with an arc-shaped structure.
[0013] Optionally, the receiving hopper is aligned vertically with the guide plate, and the interior of the receiving hopper is uniformly provided with partition plates.
[0014] Optionally, the collection box is provided with a handle and a label slot on the outside, and the bottom of the collection box is equipped with casters.
[0015] Optionally, the pushing mechanism further includes two limiting plates; both limiting plates are located within the space enclosed by the connecting belt to support the connecting belt, and the two ends of the limiting plates are respectively fixed to the two opposite inner sidewalls of the screen body.
[0016] The coal particle size screening device of the present disclosure has the following beneficial effects: (1) By using the screen body, support legs, elastic parts, vibrating motor, discharge port, guide plate, guide rod, support rod, collection box and receiving hopper together, coal can be orderly graded and screened according to particle size through the gradual change of diameter and gradient gap design at both ends of the guide rod. The number of collection boxes can be flexibly adjusted according to the particle size analysis accuracy requirements. The difference in particle size classification can be adjusted by increasing or decreasing the number, so as to achieve fine classification, adapt to different accuracy requirements, convenient operation and stronger classification accuracy, and improve the overall practicality.
[0017] (2) By using the guide roller, connecting belt, lever and drive motor together, the rotating lever can apply directional pushing force to coal particles with irregular shape and blunt edges, avoid the coal particles from getting stuck and obstructed in the gap between the guide rods, help the coal pass through the screen quickly, avoid the screening interruption caused by material jamming, ensure the continuity of operation, and at the same time greatly improve the screening efficiency, ensure the rapid advancement of coal particle size analysis, and meet the high-efficiency screening needs of batch samples. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a coal particle size screening device according to an embodiment of the present disclosure. Figure 2 This is a partial structural connection diagram of the present disclosure; Figure 3 This is a schematic diagram of the push mechanism disclosed herein; Figure 4 This is an enlarged schematic diagram of the guide rod structure disclosed herein. Detailed Implementation
[0019] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] like Figures 1 to 4 As shown, a coal particle size screening device includes an inclined screen body 1 and a vibrating motor 4 installed on two opposite outer side walls of the screen body 1. Support legs 2 are installed at the bottom corners of the screen body 1 to keep the screen body 1 in an inclined state. The top ends of the support legs 2 are connected to the screen body 1 by elastic members 3. A material discharge port 5 is provided at the bottom of the screen body 1, and a receiving hopper 11 is installed at the top of the screen body 1.
[0021] A guide plate 6 is fixed at the lower part of the screen body 1, and the guide plate 6 corresponds to the receiving hopper 11. Support rods 8 are fixed at the middle position and the end away from the guide plate 6 inside the screen body 1, with their two ends fixed to the two opposite inner side walls of the screen body 1. Multiple guide rods 7, overlapping the top of the support rods 8 and spaced apart from each other, are also provided inside the screen body 1, arranged along the inclined direction of the screen body 1. A pushing mechanism 9 is also provided at the top of the screen body 1 to push the coal on the guide rods 7, and at least one collection box 10 corresponding to the discharge port 5 is provided at the bottom of the screen body 1.
[0022] Furthermore, the diameter of the guide rod 7 gradually increases from the end closer to the guide plate 6 to the end away from the guide plate 6.
[0023] Specifically, such as Figures 1 to 4 As shown, after starting the vibration motor 4, it can synchronously drive the screen body 1, guide plate 6, and guide rod 7 to vibrate. The coal material is conveyed to the top of the guide plate 6 through the receiving hopper 11 and moves along the surface of the guide plate 6 towards the guide rod 7 under the action of vibration. Since the guide rod 7 adopts a structure design with gradually changing diameters at both ends, its gaps are distributed in a gradient with the diameter change. During the movement, the coal material falls from the corresponding gaps in order of increasing particle size. According to the accuracy requirements of coal particle size analysis, the number of collection boxes 10 can be flexibly configured: the number of collection boxes 10 is positively correlated with the particle size classification accuracy. The fewer the number, the greater the difference in particle size of the collected coal. The more the number, the smaller the difference in particle size of the collected coal, which can better meet the accuracy screening requirements in different scenarios.
[0024] Furthermore, the diameter of the guide rod 7 increases proportionally from the end closer to the guide plate 6 to the end away from the guide plate 6. The guide rod 7 is a conical rod, the elastic element 3 is a spring, and multiple guide rods 7 are arranged at equal intervals. The conical guide rod design optimizes the gap gradient distribution, enabling coal to be screened in an orderly manner according to particle size, thus improving the accuracy of particle size classification.
[0025] For example, such as Figures 1 to 4 As shown, the pushing mechanism 9 includes a drive motor 904, a connecting belt 902, a lever assembly, and two guide rollers 901. The two guide rollers 901 are mounted inside the screen body 1 along its inclined direction and are located above the guide rod 7. The drive motor 904 is mounted on the outside of the screen body 1 and coaxially connected to one of the guide rollers 901. A connecting belt 902 for transmission is sleeved between the two guide rollers 901, and multiple sets of lever assemblies are spaced apart along the transmission direction of the connecting belt 902.
[0026] Furthermore, each of the lever assemblies includes multiple levers 903 perpendicular to the connecting band 902. The first end of each lever 903 is fixed to the connecting band 902, and the second end of each lever 903 corresponds to the gap formed between the multiple spaced-apart guide rods 7.
[0027] Specifically, such as Figures 1 to 4 As shown, after the drive motor 904 is started, it drives the guide roller 901, which is coaxially connected to it, to rotate synchronously. Another guide roller 901, which is also connected to it, generates a linkage effect, causing the connecting belt 902, which is connected to it, to move directionally along the outer side of the guide roller 901. The levers 903, evenly distributed on the surface of the connecting belt 902, move along with it. When the levers 903 move down to the top of the guide rods 7, they insert themselves into the gaps between the guide rods 7, pushing away any coal material stuck between them. The levers 903 actively push and assist the coal particles to quickly escape from the gaps between the guide rods 7 and fall downwards, preventing the coal particles from getting stuck.
[0028] Furthermore, the lever 903 is an elastic rubber lever, and the second end of the lever 903 is configured with an arc-shaped structure. The elastic rubber arc-shaped lever 903 flexibly contacts the material, which not only prevents jamming and promotes screening, but also reduces hard wear on the material and equipment.
[0029] For example, such as Figure 1 As shown, the receiving hopper 11 is vertically aligned with the guide plate 6, and partition plates are evenly arranged inside the receiving hopper 11. The partition plates inside the receiving hopper 11 divert material flow, avoid local accumulation and blockage, and ensure the uniformity and continuous stability of the screening process.
[0030] For example, such as Figure 1 As shown, the collection box 10 is equipped with a handle and a label slot on its outer side, and casters are installed at the bottom of the collection box 10. The collection box 10, with its handle, label slot, and casters, facilitates quick retrieval, classification, labeling, and movement, thereby improving the efficiency of material collection and sorting.
[0031] For example, such as Figure 1 As shown, the pushing mechanism 9 also includes two limiting plates 905. Both limiting plates 905 are located within the space enclosed by the connecting belt 902 to support the connecting belt 902. The two ends of each limiting plate 905 are fixed to the two opposite inner sidewalls of the screen body 1. The limiting plates 905 inside the connecting belt 902 precisely limit offset, ensuring a stable movement trajectory of the lever 903 and guaranteeing the accuracy of the coal pushing action.
[0032] As a concrete example, such as Figures 1 to 4 As shown, when the vibration motor 4 and drive motor 904 are started, the vibration motor 4 synchronously drives the screen body 1, guide plate 6 and guide rod 7 to vibrate. The drive motor 904 drives the guide roller 901 connected to it to rotate synchronously. Another set of guide rollers 901 are linked together, which drives the connecting belt 902 connected to it to move in a direction along the outside of the guide roller 901. The levers 903 evenly distributed on the surface of the connecting belt 902 move synchronously as a whole.
[0033] Coal material is precisely conveyed to the top of guide plate 6 via receiving hopper 11. Under the vibration of screen body 1, the material moves smoothly along the surface of guide plate 6 towards guide rod 7. Guide rod 7 adopts a structure design with gradually changing diameters at both ends. The gap between adjacent guide rods 7 is distributed in a gradient with the diameter, so that the material falls sequentially from the corresponding gap in order of increasing particle size during the movement, thus completing the grading.
[0034] In response to the irregular shape and blunt edges of coal particles, when the lever 903 moves down to the top of the guide rod 7, it will precisely act on the coal material on and between the guide rod 7, helping the coal particles to quickly embed into the grading gap of the guide rod 7 and pass through the screen downwards, effectively breaking the particle jamming obstruction.
[0035] The number of collection boxes 10 can be flexibly configured according to the accuracy requirements of coal particle size analysis: the number of collection boxes 10 is positively correlated with the accuracy of particle size classification; the fewer the number, the greater the particle size difference of the collected coal. The more the number, the smaller the particle size difference of the collected coal, which can flexibly meet the accuracy screening needs in different scenarios, while significantly improving the overall screening efficiency.
[0036] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.
Claims
1. A coal particle size screening device, characterized in that, The coal particle size screening device includes an inclined screen body and a vibrating motor installed on two opposite outer side walls of the screen body; support legs are installed at the bottom corners of the screen body to make the screen body inclined; the top of the support legs is connected to the screen body by an elastic element; a material discharge port is opened at the bottom of the screen body; and a material receiving hopper is installed at the top of the screen body. A guide plate is fixed at the lower part of the screen body, and the guide plate corresponds to the receiving hopper; support rods are fixed at the middle position and the end away from the guide plate of the screen body, and the two ends of the support rods are respectively fixed to the two opposite inner side walls of the screen body; multiple guide rods are also provided inside the screen body, overlapping the top of the support rods and spaced apart from each other, and the guide rods are arranged along the inclined direction of the screen body; a pushing mechanism is also provided at the top of the screen body to push the coal on the guide rods, and at least one collection box corresponding to the discharge port is provided at the bottom of the screen body.
2. The coal particle size screening device according to claim 1, characterized in that, The diameter of the guide rod gradually increases from the end closer to the guide plate to the end away from the guide plate.
3. The coal particle size screening device according to claim 2, characterized in that, The diameter of the guide rod increases proportionally from the end closer to the guide plate to the end away from the guide plate.
4. The coal particle size screening device according to claim 3, characterized in that, The guide rod is a conical rod, the elastic element is a spring, and multiple guide rods are arranged at equal intervals.
5. The coal particle size screening device according to claim 1, characterized in that, The pushing mechanism includes a drive motor, a connecting belt, a lever assembly, and two guide rollers; Two guide rollers are mounted inside the screen body along the inclined direction of the screen body and are located above the guide rod. The drive motor is mounted on the outside of the screen body and is coaxially connected to one of the guide rollers. A connecting belt for transmission is sleeved between the two guide rollers. Multiple sets of lever assemblies are spaced apart along the transmission direction of the connecting belt.
6. The coal particle size screening device according to claim 5, characterized in that, Each of the lever assemblies includes multiple levers perpendicular to the connecting band. The first end of each lever is fixed to the connecting band, and the second end of each lever corresponds to the gap formed between the multiple spaced-apart guide rods.
7. The coal particle size screening device according to claim 6, characterized in that, The lever is an elastic rubber rod, and the second end of the lever is configured with an arc-shaped structure.
8. The coal particle size screening device according to any one of claims 1 to 7, characterized in that, The receiving hopper is aligned vertically with the guide plate, and partition plates are evenly arranged inside the receiving hopper.
9. The coal particle size screening device according to any one of claims 1 to 7, characterized in that, The collection box is equipped with a handle and a label slot on the outside, and casters are installed at the bottom of the collection box.
10. The coal particle size screening device according to claim 5, characterized in that, The pushing mechanism also includes two limiting plates; both limiting plates are located within the space enclosed by the connecting belt to support the connecting belt, and the two ends of the limiting plates are respectively fixed to the two opposite inner sidewalls of the screen body.