Screen for raw coal crusher
Through the combination of the cylindrical screen with adjustable fixed bracket and rotating assembly, the problem of screens being easily blocked and uneven screening is solved, and an efficient and continuous screening process is achieved, which reduces energy consumption and maintenance costs and extends the equipment life.
Patent Information
- Application Number
- CN202421896712.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The existing cylindrical screen has high manufacturing and maintenance costs, low screening efficiency, easy to blockage and uneven screening. The traditional design is damaged in some areas during rotation, affecting coal quality and processing efficiency.
The cylindrical screen combines an adjustable fixed bracket and a rotating assembly. The screen can swing within a defined angle, is equipped with a stirring mechanism and a spiral stirring paddle, which uses gravity to accelerate the screening and prevent material accumulation, improving screening accuracy and efficiency.
It realizes an efficient and continuous screening process, reduces energy consumption and maintenance costs, extends equipment life, and improves screening accuracy and productivity.
Smart Images
Figure CN223221645U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal mine processing, and in particular relates to a screen for a raw coal crusher. Background Art
[0002] A raw coal crusher is a piece of machinery specifically designed for the initial processing of coal after mining. Its primary function is to break down large lumps of raw coal mined directly from the mine into smaller pieces or granules suitable for subsequent processing and transportation. Coal crushers play a crucial role in the coal industry, directly impacting not only the quality of the coal but also the efficiency and energy consumption of the entire coal processing line.
[0003] Screens are an essential component of coal crushers. They are primarily used to grade and screen the crushed coal, ensuring that the final product particle size meets specific standards. Screens not only remove dust and fine particles generated during the crushing process, but also separate coal of varying sizes to meet the needs of different users. Without screens, the crushed coal cannot be effectively sorted, significantly reducing its value and market acceptance.
[0004] Although cylindrical screens are designed to improve screening efficiency by increasing the screening area and using gravity to accelerate material flow, they have some significant limitations. First, cylindrical screens are expensive to manufacture and replace because they typically require customized sizes and shapes, which increases production and maintenance costs. Second, cylindrical screens are relatively complex to maintain because their spatial limitations make cleaning and inspection difficult, which can lead to clogged screen holes and reduced screening efficiency.
[0005] In some designs, the screen may only have a filter screen at certain angles, while other areas may not. This design is theoretically intended to reduce material accumulation and increase material throughput. However, in practice, if the screen rotates 360 degrees, only certain areas with screening function will be frequently impacted by the material. This not only reduces screening efficiency, but may also accelerate the wear of this part of the screen, shortening the screen's service life. Utility Model Content
[0006] In view of this, the utility model provides a screen for a raw coal crusher, which can improve the filtering efficiency while reducing the screen area.
[0007] The utility model is achieved in this way:
[0008] The utility model provides a screen for a raw coal crusher, comprising a screen, wherein the screen is cylindrical and has fixed brackets at both ends for fixing the screen, the fixed brackets being located at both ends of the screen, the fixed brackets comprising a first fixed bracket and a second fixed bracket, wherein the height of the first fixed bracket is higher than the height of the second fixed bracket, and a rotating component for rotating the screen is provided on the first fixed bracket, and the rotating component can cause the screen to swing within a limited angle.
[0009] The technical effects of the screen for a raw coal crusher provided by this utility model are as follows: by adopting a cylindrical structure and an adjustable fixed bracket, material processing efficiency and screening effect are significantly improved. Traditional flat screens are prone to clogging and uneven screening when processing large pieces of raw coal, but the cylindrical screen can effectively avoid these problems, ensuring a continuous and efficient screening process.
[0010] The design of the first fixed bracket being higher than the second fixed bracket creates an inclined angle on the screen, which not only helps the material slide smoothly but also accelerates the screening speed by leveraging gravity. More importantly, the rotating assembly allows the screen to swing within a certain angle range. This dynamic screening method prevents material from accumulating on the screen, while enhancing the screen's ability to screen particles of different sizes and improving screening accuracy.
[0011] In addition, the rotatable screen facilitates cleaning and maintenance, reducing downtime and maintenance costs. Overall, this innovative design greatly optimizes the performance of the raw coal crusher, reduces energy consumption, and extends the service life of the equipment, representing a significant technological advancement in the coal processing industry.
[0012] On the basis of the above technical solution, the screen for a raw coal crusher of the present invention can also be improved as follows:
[0013] In which, the rotating assembly includes a rotating motor, a first connecting rod, a sliding block and a second connecting rod. The second connecting rod is a long rod, one end of which is fixedly connected to the highest point of the first fixed bracket and can swing around a fixed point. The other end is fixed to the lowest point of the bottom surface of the screen facing the first fixed bracket and is rotatably connected to the fixed point. One side of the sliding block slides on the second connecting rod, and the other side is rotatably connected to one end of the first connecting rod. The other end of the first connecting rod is fixedly connected to the output end of the rotating motor. The base of the rotating motor is fixed at the highest point of the first fixed bracket through the first fixing rod and is fixedly connected to the first connecting rod.
[0014] Furthermore, the rotating motor is located on the screen shaft, above the first connecting rod.
[0015] Furthermore, the first connecting rod and the second connecting rod are parallel to each other.
[0016] Furthermore, the second connecting rod is movably connected to the screen through a fixing sleeve, the bottom of the fixing sleeve is rotatably connected to the screen, and a through hole with a size adapted to that of the second connecting rod is provided above the screen.
[0017] The beneficial effects of adopting the above-mentioned improved solution are as follows: the fixed sleeve serves as a connecting member, ensuring a stable movable connection between the second connecting rod and the screen, while allowing the second connecting rod to slide freely in the through hole in the screen without affecting the overall structure and strength of the screen;
[0018] This structure ensures smoother and more flexible swinging of the screen when driven by the rotating assembly, avoiding the mechanical stress concentration and wear problems that may be caused by rigid connections. Furthermore, due to the rotating connection between the fixed sleeve and the screen, the screen can maintain good balance during the swing process, reducing vibration and noise, and improving the operational stability of the equipment. Furthermore, the through-hole design facilitates maintenance and inspection, ensuring smooth movement of the second connecting rod, thereby ensuring precise control of the screen's swing angle, further improving screening efficiency and accuracy, reducing maintenance costs, and extending the equipment's service life.
[0019] Furthermore, it also includes a stirring mechanism for stirring the coal blocks inside the screen, the stirring mechanism includes a rotating motor, the base of the rotating motor is fixed to the axis of the screen through a second fixing rod, and the output shaft of the rotating motor is provided with a stirring paddle for stirring the coal blocks, and the stirring paddle can contact the inner wall of the screen.
[0020] Furthermore, the stirring paddle is a U-shaped structure, one end of which is rotatably connected to the output shaft of the rotating motor, and the other end is movably connected to the fixed bracket through a third fixed rod, and the interruption of the fixed bracket is connected to the inner wall of the screen.
[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the U-shaped stirring paddle can more comprehensively cover the internal space of the screen, ensuring that the coal lumps are evenly dispersed and stirred during the screening process, effectively preventing the material from agglomerating or clogging the screen holes, and improving the screening efficiency and quality;
[0022] The direct connection of the stirring paddle to the rotating motor ensures the stability and strength of the stirring action, while the movable connection of the other end to the fixed bracket via a third fixing rod increases the flexibility and adaptability of the stirring paddle. This design allows the stirring paddle to swing freely inside the screen, better adapting to the swinging state of the screen driven by the rotating assembly. It can maintain effective stirring even when the screen angle changes, avoiding the mechanical interference and damage risks that may be caused by traditional rigid connections.
[0023] In addition, the interruption of the fixed bracket is connected to the inner wall of the screen, which not only ensures the accurate positioning of the stirring paddle, but also reduces the direct impact on the screen wall during the stirring process, protecting the integrity and durability of the screen structure.
[0024] Furthermore, the stirring paddle includes a rotating rod in the middle, a spiral stirring paddle is provided on the outer side of the rotating rod, and the outer side of the stirring paddle contacts the inner side wall of the screen.
[0025] The beneficial effects of adopting the above-mentioned improved solution are as follows: when the rotating motor drives the rotating rod to rotate, the propeller blades push the coal blocks forward along the inner wall of the screen, which not only helps to evenly distribute the coal blocks in the screen, but also promotes smaller particles of coal to pass through the screen holes smoothly, achieving efficient screening;
[0026] The contact between the propeller blades and the inner wall of the screen can generate slight friction, which helps to remove coal dust or other impurities that may be stuck in the screen holes, reducing the risk of screen hole blockage, thereby maintaining the continuity and efficiency of the screening process. At the same time, the coal blocks are guided by the propeller blades to move toward the screen outlet, which helps to improve the fluidity of the coal blocks. Especially for sticky coals, it can prevent material from accumulating on the screen, speed up the screening process, and improve productivity.
[0027] Furthermore, the contact between the spiral agitator and the inner wall of the screen helps reduce the jumping and bouncing of coal during screening, reducing the direct impact of coal on the screen and extending the service life of the screen. In summary, this improvement not only improves screening efficiency but also enhances the reliability and economic efficiency of the equipment, and has important practical significance for screening operations in the coal processing industry.
[0028] Furthermore, the rotating motor is located inside the screen.
[0029] Furthermore, the angle between the central axis of the screen and the horizontal plane is 20 to 40 degrees.
[0030] Compared with the prior art, the beneficial effects of the screen for raw coal crusher provided by the utility model are:
[0031] Improved screening efficiency and effect: The cylindrical screen structure combined with the adjustable fixed bracket overcomes the problems of easy clogging and uneven screening of traditional flat screens, ensuring a continuous and efficient screening process;
[0032] Gravity-assisted and dynamic screening: The tilted design of the screen and the use of rotating components use gravity to accelerate screening, while dynamic swinging prevents material accumulation, enhancing the screening ability of particles of different particle sizes and improving screening accuracy;
[0033] Convenient maintenance and cost savings: The rotatable nature of the screen simplifies the cleaning and maintenance process, reduces downtime and reduces maintenance costs;
[0034] Structural strength and operational stability: The second connecting rod and the screen are movably connected through a fixed sleeve, which ensures the stability and flexibility of the screen swing, reduces mechanical stress and wear, reduces vibration and noise, and improves the operational stability of the equipment;
[0035] Optimized stirring mechanism: The coordinated work of the U-shaped stirring paddle and the internal structure of the screen ensures the uniform dispersion and stirring of coal lumps, prevents material agglomeration, and improves screening efficiency and quality;
[0036] Spiral stirring paddle design: The spiral stirring paddle pushes the coal blocks to move along the inner wall of the screen, which promotes the screening of small-particle coal, reduces the blockage of the screen holes, and improves the fluidity of the coal blocks. It is particularly suitable for sticky coal, speeds up the screening process, and improves productivity.
[0037] Improved equipment reliability and economic efficiency: The contact between the propeller blades and the inner wall of the screen reduces the direct impact of coal blocks on the screen, extends the service life of the screen, and improves the overall reliability and economic efficiency of the equipment;
[0038] Compact layout and angle optimization: The rotating motor is located inside the screen, saving external space; the specific angle design (20-40°) between the center axis of the screen and the horizontal plane optimizes the material flow during the screening process, further improving the screening efficiency and effect.
[0039] In summary, this utility model significantly improves the screening performance of the raw coal crusher, reduces energy consumption, and extends the life of the equipment through a series of innovative designs. It is an important technological advancement in the field of coal processing. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0041] Figure 1 The figure is a schematic diagram of a screen for a raw coal crusher;
[0042] Figure 2 for Figure 1 Schematic diagram of screen A in the middle;
[0043] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0044] 1. Screen; 2. Fixed bracket; 21. First fixed bracket; 22. Second fixed bracket; 3. Rotating assembly; 31. Rotating motor; 32. First connecting rod; 33. Sliding block; 34. Second connecting rod; 4. Stirring mechanism; 41. Rotating motor; 42. Stirring paddle. DETAILED DESCRIPTION
[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0046] like Figure 1 , Figure 2 As shown, it is a first embodiment of a screen for a raw coal crusher provided by the utility model. In this embodiment, it includes a screen 1, which is cylindrical and has fixed brackets 2 at both ends for fixing the screen 1. The fixed brackets 2 are located at both ends of the screen 1. The fixed brackets 2 include a first fixed bracket 21 and a second fixed bracket 22, wherein the height of the first fixed bracket 21 is higher than the height of the second fixed bracket 22, and a rotating component 3 for rotating the screen 1 is provided on the first fixed bracket 21. The rotating component 3 can make the screen 1 swing within a limited angle.
[0047] Among them, in the above technical scheme, the rotating assembly 3 includes a rotating motor 31, a first connecting rod 32, a sliding block 33 and a second connecting rod 34. The second connecting rod 34 is a long rod, one end of which is fixedly connected to the highest point of the first fixed bracket 21 and can swing around the fixed point. The other end is fixed to the lowest point of the bottom surface of the screen 1 on one side facing the first fixed bracket 21 and is rotatably connected to the fixed point. One side of the sliding block 33 slides on the second connecting rod 34, and the other side is rotatably connected to one end of the first connecting rod 32. The other end of the first connecting rod 32 is fixedly connected to the output end of the rotating motor 31. The base of the rotating motor 31 is fixed at the highest point of the first fixed bracket 21 through the first fixing rod and is fixedly connected to the first connecting rod 32.
[0048] Furthermore, in the above technical solution, the rotating motor 31 is located on the axis of the screen 1 , above the first connecting rod 32 .
[0049] Furthermore, in the above technical solution, the first connecting rod 32 and the second connecting rod 34 are parallel to each other.
[0050] Furthermore, in the above technical solution, the second connecting rod 34 is movably connected to the screen 1 through a fixed sleeve, the bottom of the fixed sleeve is rotatably connected to the screen 1, and a through hole with a size adapted to the second connecting rod 34 is provided above the screen 1.
[0051] Furthermore, the above technical solution also includes a stirring mechanism 4 for stirring the coal blocks inside the screen 1. The stirring mechanism 4 includes a rotating motor 41. The base of the rotating motor 41 is fixed to the axis of the screen 1 through a second fixed rod. The output shaft of the rotating motor 41 is provided with a stirring paddle 42 for stirring the coal blocks. The stirring paddle 42 can contact the inner wall of the screen 1.
[0052] Furthermore, in the above technical solution, the stirring paddle 42 is a U-shaped structure, one end of which is rotatably connected to the output shaft of the rotating motor 41, and the other end is movably connected to the fixed bracket 2 through a third fixed rod, and the interruption of the fixed bracket 2 is connected to the inner wall of the screen 1.
[0053] Furthermore, in the above technical solution, the rotating motor 41 is located inside the screen 1 .
[0054] Furthermore, in the above technical solution, the angle between the central axis of the screen 1 and the horizontal plane is 20 to 40 degrees.
[0055] like Figure 1 , Figure 2 As shown, it is a second embodiment of a screen for a raw coal crusher provided by the utility model. In this embodiment, it includes a screen 1, which is cylindrical and has fixed brackets 2 at both ends for fixing the screen 1. The fixed brackets 2 are located at both ends of the screen 1. The fixed brackets 2 include a first fixed bracket 21 and a second fixed bracket 22, wherein the height of the first fixed bracket 21 is higher than the height of the second fixed bracket 22, and a rotating component 3 for rotating the screen 1 is provided on the first fixed bracket 21. The rotating component 3 can make the screen 1 swing within a limited angle.
[0056] Among them, in the above technical scheme, the rotating assembly 3 includes a rotating motor 31, a first connecting rod 32, a sliding block 33 and a second connecting rod 34. The second connecting rod 34 is a long rod, one end of which is fixedly connected to the highest point of the first fixed bracket 21 and can swing around the fixed point. The other end is fixed to the lowest point of the bottom surface of the screen 1 on one side facing the first fixed bracket 21 and is rotatably connected to the fixed point. One side of the sliding block 33 slides on the second connecting rod 34, and the other side is rotatably connected to one end of the first connecting rod 32. The other end of the first connecting rod 32 is fixedly connected to the output end of the rotating motor 31. The base of the rotating motor 31 is fixed at the highest point of the first fixed bracket 21 through the first fixing rod and is fixedly connected to the first connecting rod 32.
[0057] Furthermore, in the above technical solution, the rotating motor 31 is located on the axis of the screen 1 , above the first connecting rod 32 .
[0058] Furthermore, in the above technical solution, the first connecting rod 32 and the second connecting rod 34 are parallel to each other.
[0059] Furthermore, in the above technical solution, the second connecting rod 34 is movably connected to the screen 1 through a fixed sleeve, the bottom of the fixed sleeve is rotatably connected to the screen 1, and a through hole with a size adapted to the second connecting rod 34 is provided above the screen 1.
[0060] Furthermore, the above technical solution also includes a stirring mechanism 4 for stirring the coal blocks inside the screen 1. The stirring mechanism 4 includes a rotating motor 41. The base of the rotating motor 41 is fixed to the axis of the screen 1 through a second fixed rod. The output shaft of the rotating motor 41 is provided with a stirring paddle 42 for stirring the coal blocks. The stirring paddle 42 can contact the inner wall of the screen 1.
[0061] Furthermore, in the above technical solution, the stirring paddle 42 includes a central rotating rod, a spiral stirring paddle is provided on the outer side of the rotating rod, and the outer side of the stirring paddle contacts the inner side wall of the screen 1 .
[0062] Furthermore, in the above technical solution, the rotating motor 41 is located inside the screen 1 .
[0063] Furthermore, in the above technical solution, the angle between the central axis of the screen 1 and the horizontal plane is 20 to 40 degrees.
[0064] Specifically, the principle of the present utility model is:
[0065] 1. Cylindrical Screen and Inclined Design: The screen adopts a cylindrical structure, supported at both ends by a first fixed bracket and a second fixed bracket at different heights. This inclined design uses gravity to allow the material to slide naturally during the screening process, accelerating the screening speed. At the same time, the cylindrical shape of the screen prevents material accumulation, ensuring continuous and efficient screening.
[0066] 2. Dynamic Screening Mechanism: The screen is equipped with a rotating assembly, including a rotating motor, a first connecting rod, a sliding block, and a second connecting rod, which allows the screen to swing within a limited angle range. The rotating motor drives the second connecting rod through the first connecting rod and the sliding block system, which in turn drives the screen to swing. This dynamic screening method helps to evenly distribute the material on the screen surface, prevents clogging, and improves the screening ability of particles of different particle sizes.
[0067] 3. Stirring mechanism: The screen is equipped with a stirring mechanism consisting of a rotating motor and a U-shaped stirring paddle. One end of the stirring paddle is connected to the output shaft of the rotating motor, and the other end is movably connected to the fixed bracket via a third fixing rod. The rotation of the stirring paddle promotes the uniform dispersion of coal lumps within the screen, preventing material agglomeration and improving screening efficiency and quality. The U-shaped design of the stirring paddle and its contact with the inner wall of the screen help to evenly distribute the material on the screen and reduce clogging of the screen holes.
[0068] 4. Spiral agitator: The spiral design of the agitator propels the coal along the inner wall of the screen as it rotates, helping to evenly distribute the coal and screen out small coal particles. The slight friction between the propeller blades and the inner wall of the screen helps remove impurities from the screen holes, reduces blockage, and maintains screening efficiency. The spiral agitator design also reduces direct impact of coal on the screen, extending the screen's service life.
[0069] 5. Equipment layout and angle optimization: The rotating motor is located inside the screen, saving space and reducing external interference. The angle between the center axis of the screen and the horizontal plane is set between 20° and 40°, optimizing the material flow path and improving screening efficiency.
[0070] In summary, the utility model realizes an efficient and stable screening process through the cylindrical screen, dynamic screening mechanism, internal stirring mechanism and optimized equipment layout, reduces energy consumption and extends the service life of the equipment. It is an important innovation in screening technology in the coal processing industry.
Claims
1. A screen for a raw coal crusher, comprising a screen (1), wherein the screen (1) is cylindrical, and fixed brackets (2) for fixing the screen (1) are provided at both ends, wherein the fixed brackets (2) are located at both ends of the screen (1), and the fixed brackets (2) include a first fixed bracket (21) and a second fixed bracket (22), characterized in that: The height of the first fixed bracket (21) is higher than that of the second fixed bracket (22). A rotating assembly (3) for rotating the screen (1) is provided on the first fixed bracket (21). The rotating assembly (3) can cause the screen (1) to swing within a limited angle.
2. A screen for a raw coal crusher according to claim 1, characterized in that: The rotating assembly (3) comprises a rotating motor (31), a first connecting rod (32), a sliding block (33) and a second connecting rod (34). The second connecting rod (34) is a long rod, one end of which is fixedly connected to the highest point of the first fixed bracket (21) and can swing around the fixed point. The other end is fixed to the lowest point of the bottom surface of the screen (1) facing the first fixed bracket (21) and is rotatably connected to the fixed point. One side of the sliding block (33) slides on the second connecting rod (34), and the other side is rotatably connected to one end of the first connecting rod (32). The other end of the first connecting rod (32) is fixedly connected to the output end of the rotating motor (31). The base of the rotating motor (31) is fixed to the highest point of the first fixed bracket (21) through the first fixing rod and is fixedly connected to the first connecting rod (32).
3. A screen for a raw coal crusher according to claim 2, characterized in that: The rotating motor (31) is located on the axis of the screen (1), above the first connecting rod (32).
4. A screen for a raw coal crusher according to claim 3, characterized in that: The first connecting rod (32) and the second connecting rod (34) are parallel to each other.
5. A screen for a raw coal crusher according to claim 4, characterized in that: The second connecting rod (34) is movably connected to the screen (1) through a fixing sleeve, the bottom of the fixing sleeve is rotatably connected to the screen (1), and a through hole with a size adapted to that of the second connecting rod (34) is provided above the screen (1).
6. A screen for a raw coal crusher according to claim 5, characterized in that: The invention also includes a stirring mechanism (4) for stirring the coal blocks inside the screen (1), wherein the stirring mechanism (4) includes a rotating motor (41), the base of the rotating motor (41) is fixed to the axis of the screen (1) through a second fixing rod, and the output shaft of the rotating motor (41) is provided with a stirring paddle (42) for stirring the coal blocks, and the stirring paddle (42) can contact the inner side wall of the screen (1).
7. A screen for a raw coal crusher according to claim 6, characterized in that: The stirring paddle (42) is a U-shaped structure, one end of which is rotatably connected to the output shaft of the rotating motor (41), and the other end of which is movably connected to the fixed bracket (2) through a third fixed rod, and the interruption of the fixed bracket (2) is connected to the inner side wall of the screen (1).
8. A screen for a raw coal crusher according to claim 7, characterized in that: The stirring paddle (42) comprises a rotating rod in the middle, a spiral stirring paddle is provided on the outer side of the rotating rod, and the outer side of the stirring paddle contacts the inner side wall of the screen (1).
9. A screen for a raw coal crusher according to claim 8, characterized in that: The rotating motor (41) is located inside the screen (1).
10. A screen for a raw coal crusher according to claim 9, characterized in that: The angle between the central axis of the screen (1) and the horizontal plane is 20-40°.