A vibration sieve screen plate flow guide device
By designing a flow guiding device for the vibrating screen plate, the angle of the flow guiding plate is dynamically adjusted by using a cam to guide the material in the solid plate area to the screen mesh, which solves the problem that the material in the solid plate area of the screen plate cannot be screened, and improves the screening efficiency and the ability to handle fine particles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINWEN MINING GROUP
- Filing Date
- 2025-06-03
- Publication Date
- 2026-07-03
AI Technical Summary
The existing vibrating screen cannot screen materials in the solid area of the screen plate, resulting in a decrease in the recovery rate of clean coal. Subsequent processes require the addition of secondary screening equipment, which complicates the process and increases energy consumption.
Design a flow guiding device for a vibrating screen plate. By rotating a cam, the roller drives the flow guiding plate to rotate around the hinge point. The opening and closing angle of the flow guiding plate is dynamically adjusted to guide the material in the solid plate area to the screen area for screening.
It significantly improves the screening rate of fine materials, eliminates screening blind spots, reduces the need for secondary screening, and improves screening efficiency and processing capacity.
Smart Images
Figure CN224443678U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of screening auxiliary equipment, specifically relating to a flow guiding device for a vibrating screen plate. Background Technology
[0002] In the efficient sorting and processing of coal resources in coal preparation plants, the vibrating screen, as a core material grading device, undertakes the crucial task of separating mixed-size coal according to particle size differences. It uses periodic vibration to cause materials of different particle sizes to move directionally on the screen surface, achieving effective screening of components such as clean coal, middlings, and gangue. This is a prerequisite for ensuring the efficient operation of subsequent washing, dewatering, and transportation processes.
[0003] Most existing vibrating screens adopt a modular design, with multiple screen plates spliced and fixed to the screen box frame by bolts, clips, etc., to form a complete screening working surface. To solve the problem of local accumulation caused by concentrated material falling, vibrating screens are generally equipped with a diverter plate at the feed end. The diverter plate is usually arranged at a specific angle above the screen plate. It uses the rebound effect of the material impact to evenly distribute the concentrated material flow to the surface of each screen plate, avoiding overload in a single area and improving the utilization rate of the screen surface.
[0004] However, in practical applications, because installation interfaces need to be reserved when splicing screen plates, solid areas without screen holes are formed at the joints of adjacent screen plates. When the diverter plate evenly distributes the material onto the screen surface, some material inevitably falls into these solid areas. Since the solid plate surface has no screen holes, the material cannot contact the screen mesh, and fine particles cannot be separated through screening. They can only remain in the solid area and move towards the discharge end with the coarse particles, eventually mixing with the coarse particles. This problem not only leads to a decrease in the clean coal recovery rate but also forces the subsequent processes to add secondary screening equipment, resulting in process complexity and increased energy consumption, becoming a bottleneck restricting the improvement of vibrating screen screening efficiency. Utility Model Content
[0005] This invention addresses the problem that materials located in the solid area of the sieve plate cannot be screened, and provides a vibrating screen plate guiding device that can guide materials located in the solid area of the sieve plate to the screen mesh for screening.
[0006] To solve the above problems, the technical solution adopted by this utility model is a vibrating screen plate guiding device, including a base plate, which is fixed to the solid plate area of the screen plate. A first guide plate and a second guide plate are provided on the base plate. The side of the first guide plate and the side of the second guide plate are rotatably connected. A first roller is fixed on the inner side of the first guide plate and a second roller is fixed on the inner side of the second guide plate. A cam is provided between the first guide plate and the second guide plate. The cam is located above the base plate, and the outer peripheral surface of the cam makes rolling contact with the first roller and the second roller respectively.
[0007] In this technical solution, a rotating cam drives the first and second rollers, which in turn cause the first and second guide plates to rotate around their side hinge points, dynamically adjusting their opening and closing angles. When material falls onto the solid plate area of the screen plate, the first and second guide plates, in their unfolded state, guide the material to the screen areas on both sides, allowing material that could not be screened to return to the effective screen surface, significantly improving the screening rate of fine particles. Therefore, this device effectively eliminates screening blind spots by actively intervening in the material flow direction in the solid plate area, reducing the need for secondary screening and improving the overall screening efficiency and processing capacity of the vibrating screen.
[0008] Furthermore, a rotating shaft is provided on the base plate, with its axis perpendicular to the upper surface of the base plate. The lower end of the rotating shaft penetrates the base plate and is fixedly connected to the solid plate area of the screen plate. The cylindrical surface of the rotating shaft is rotatably connected to the side of the first guide plate and the side of the second guide plate, respectively. The axis of the rotating shaft is perpendicular to the upper surface of the base plate, ensuring that the guide plates maintain planar motion when rotating around the shaft, avoiding guide failure caused by tilting or shaking. The lower end of the rotating shaft is directly fixed to the solid plate area of the screen plate, making the entire guide device and the screen plate form a rigid whole, effectively resisting the fatigue stress generated by the high-frequency vibration of the vibrating screen and extending its service life.
[0009] Furthermore, the bottom surfaces of both the first and second guide vanes are slidably attached to the upper surface of the base plate. This sliding contact between the bottom surfaces of the guide vanes and the upper surface of the base plate forms a planar motion pair, forcing the guide vanes to rotate only around the axis of rotation. This prevents the plates from tilting or wobbling due to the radial force during cam driving, ensuring the accuracy of the guide angle.
[0010] Furthermore, the first and second guide plates form an inverted V-shape, with their opening angle between 60-90°. This inverted V-shape allows material falling onto the solid area of the screen plate to be simultaneously pushed towards the screen areas on both sides. The opening angle of the first and second guide plates, between 60-90°, is suitable for the screening and guiding needs of different materials.
[0011] Furthermore, a locking screw is provided on the base plate. The axis of the locking screw is perpendicular to the upper surface of the base plate. The upper end of the locking screw is fixedly connected to the lower end face of the cam, and the lower end of the locking screw passes through the solid plate area of the base plate and the screen plate and is threadedly connected to the locking nut. The locking screw passes through the solid plate area of the base plate and the screen plate and is locked by the locking nut. When the cam needs to be rotated, the locking nut is unscrewed; when the cam does not need to be rotated, the locking nut is tightened. This fixes the position of the cam, ensuring stable contact between the cam profile and the roller, and preventing the guide action from failing due to positioning deviation.
[0012] Furthermore, a connecting rod is provided above the cam, with its axis coinciding with the axis of the locking screw. The lower end of the connecting rod is fixedly connected to the upper end face of the cam, and a knob is fixed to the upper end of the connecting rod. The axis of the knob coincides with the axis of the locking screw. The operator can rotate the cam by holding the knob vertically and rotating it clockwise or counterclockwise, without the need for additional tools; the rotation of the cam can be completed with one hand.
[0013] Furthermore, the knob has a concave arc on its side. The shape of the concave arc matches the natural curvature of the fingertips, making it fit the palm more snugly when gripped and reducing slippage when applying force.
[0014] Furthermore, two protrusions are provided on the outer circumferential surface of the cam, and the two protrusions are centrally symmetrical about the center point of the cam axis. When the cam rotates, the symmetrically arranged protrusions can simultaneously push the first guide plate and the second guide plate with the same force, so that the opening and closing angles of the two are consistent and the movements are coordinated, avoiding the problem of one side being faster and the other slower being out of sync.
[0015] Furthermore, the upper surface of the base plate is provided with angle scale lines. During operation, the angle value can be read directly through the scale lines without the need for additional measuring tools, allowing for quick determination of whether the installation or adjustment angle of the component meets the requirements.
[0016] Furthermore, both the first and second guide vanes are coated with a wear-resistant coating on their outer surfaces. This wear-resistant coating effectively resists material impact and friction, reduces surface wear and dents, and prevents functional failure due to thinning of the plates or structural damage.
[0017] As can be seen from the above technical solution, the advantages of this utility model are as follows: This technical solution uses a rotating cam to drive the first and second rollers, which in turn drives the first and second guide plates to rotate around the side hinge point, realizing dynamic adjustment of their opening and closing angles. When the material falls into the solid plate area of the screen plate, the first and second guide plates, in their unfolded state, actively guide the material to the screen areas on both sides, allowing the material that was originally unable to be screened and was retained in the solid plate area to return to the effective screen surface, significantly improving the screening rate of fine particles. In summary, this device, by actively intervening in the material flow direction in the solid plate area of the screen plate, effectively eliminates the screening blind zone caused by the solid plate area during the screening process, avoids the accumulation and ineffective retention of material in non-screen areas, reduces the need for subsequent secondary screening of the material, and improves the overall screening efficiency and material handling capacity of the vibrating screen. Attached Figure Description
[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;
[0020] Figure 2 This is an installation diagram illustrating a specific embodiment of the present invention.
[0021] In the diagram: 1. Sieve plate; 2. Base plate; 3. First guide plate; 4. Second guide plate; 5. Rotating shaft; 6. First roller; 7. Second roller; 8. Cam; 9. Locking screw; 10. Locking nut; 11. Stop block; 12. Connecting rod; 13. Knob; 14. Concave arc; 15. Protrusion; 16. Angle scale line; 17. Solid plate area; 18. Sieve area. Detailed Implementation
[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0023] A vibrating screen plate guiding device, such as Figure 1 As shown, the device includes a base plate 2, which is fixedly installed on the solid plate area 17 of the sieve plate 1, serving as the basic support structure for the entire device. The base plate 2 is a rectangular flat plate with two through holes. The two through holes are distributed along the vertical direction of the base plate 2 at the middle position. A rotating shaft 5 is installed in the upper hole. The axis of the rotating shaft 5 is perpendicular to the upper surface of the base plate 2. The lower end of the rotating shaft 5 has a thread on its outer surface. After the lower end of the rotating shaft 5 passes through the through hole, it can be fixedly connected to the solid plate area 17 of the sieve plate 1 by bolts, thereby firmly installing the rotating shaft 5 on the sieve plate 1. The upper cylindrical surface of the rotating shaft 5 is rotatably connected to the side of the first guide plate 3 and the side of the second guide plate 4, respectively, so that the first guide plate 3 and the second guide plate 4 can rotate around the rotating shaft 5, forming an adjustable flow guiding structure.
[0024] Both the first guide plate 3 and the second guide plate 4 are rectangular flat plates. Their outer surfaces are perpendicular to the upper surface of the base plate 2, and their bottom surfaces are also slidably attached to the upper surface of the base plate 2. This attachment method ensures the stability of the guide plates during rotation and prevents material leakage from the bottom gap. They form an inverted V-shaped structure through a rotatable connection between their sides and the rotating shaft 5, with the opening angle limited to between 60-90°. On the inner side of the first guide plate 3, a first roller 6 is fixed with bolts, its axis perpendicular to the upper surface of the base plate 2. Similarly, on the inner side of the second guide plate 4, a second roller 7 is fixed with bolts, its axis also perpendicular to the upper surface of the base plate 2, and the first roller 6 and the second roller 7 are positioned opposite each other. A cam 8 is provided between the first guide plate 3 and the second guide plate 4. The cam 8 is located above the base plate 2 and is horizontally arranged between the first roller 6 and the second roller 7. The axis of the cam 8 is also perpendicular to the upper surface of the base plate 2. The outer peripheral surface of the cam 8 makes rolling contact with the first roller 6 and the second roller 7 respectively. When the cam 8 rotates, the protrusion 15 on the outer peripheral surface can push the roller, thereby driving the first guide plate 3 and the second guide plate 4 to rotate around the rotating shaft 5, so as to realize the dynamic adjustment of the opening and closing angle.
[0025] Two protrusions 15 are provided on the outer peripheral surface of the cam 8. These two protrusions 15 are centrally symmetrical about the center point of the axis of the cam 8. This symmetrical design allows the two protrusions 15 to push the first roller 6 and the second roller 7 with the same force during the rotation of the cam 8, thereby ensuring that the opening and closing angles of the first guide plate 3 and the second guide plate 4 are consistent and their movements are coordinated, avoiding the problem of asynchronous movement of the two guide plates.
[0026] To fix the position of the cam 8, a locking screw 9 is provided on the base plate 2. The axis of the locking screw 9 is perpendicular to the upper surface of the base plate 2. The upper end of the locking screw 9 is welded to the center of the lower end face of the cam 8, and the lower end of the locking screw 9 passes through the light hole in the lower position of the base plate 2 and the solid plate area 17 of the sieve plate 1 and is threaded to the locking nut 10. A stop block 11 is also welded on the outer circular surface of the locking screw 9. The stop block 11 is located between the cam 8 and the base plate 2. The stop block 11 can cooperate with the locking nut 10 to fix the position of the cam 8, thereby ensuring that the height of the cam 8 is fixed and preventing it from moving in the axial direction. A connecting rod 12 is provided above the cam 8. The axis of the connecting rod 12 coincides with the axis of the locking screw 9. The lower end of the connecting rod 12 is welded to the center of the upper end face of the cam 8. A knob 13 is fixedly attached to the upper end of the connecting rod 12. A concave arc 14 is provided on the side of the knob 13. The shape of the concave arc 14 matches the natural curvature of the fingertip, making it easy for the operator to hold the knob 13. The cam 8 is rotated by rotating the knob 13.
[0027] On the upper surface of the base plate 2, angle scale lines 16 are provided corresponding to the positions of the first guide plate 3 and the second guide plate 4. The angle scale lines 16 can intuitively display the opening and closing angles of the first guide plate 3 and the second guide plate 4, providing a clear reference for adjusting the angles during installation, debugging, and maintenance. In addition, the outer surfaces of the first guide plate 3 and the second guide plate 4 are provided with wear-resistant coatings. The wear-resistant coatings can be made of materials such as ceramics or polyurethane, which can effectively resist the impact and friction of materials during the flow process, reduce wear and dents on the surfaces of the first guide plate 3 and the second guide plate 4, and thus extend their service life.
[0028] The specific usage process of this utility model is as follows: (e.g.) Figure 2 As shown, the installation and fixing are performed first: After splicing multiple screen plates 1, the flow guiding device is placed in the solid plate area 17 of the screen plate 1, so that the lower surface of the base plate 2 is in close contact with the solid plate area 17. The lower end of the rotating shaft 5 is passed through the existing connecting hole in the solid plate area 17 of the screen plate 1 and locked with a nut to achieve rigid fixation between the flow guiding device and the screen plate 1. Then, a light hole is opened in the solid plate area 17 of the screen plate 1 at the position corresponding to the locking screw 9. The lower end of the locking screw 9 is passed through the light hole until the stop block 11 on the outer circle of the screw abuts against the upper surface of the base plate 2. At this time, the locking screw 9 is pre-tightened from below the screen plate 1 by the locking nut 10, so that the base plate 2 is completely fixed and will not shift, thus completing the overall installation of the device.
[0029] Next, the opening and closing angle is adjusted: Based on the particle size, moisture content, and other characteristics of the material to be screened, the opening and closing angles of the first guide plate 3 and the second guide plate 4 need to be set. During operation, first loosen the locking nut 10 until the locking screw 9 can rotate freely. Then, rotate the knob 13 clockwise or counterclockwise to drive the cam 8 to rotate synchronously. The centrally symmetrical protrusion 15 on the outer circumference of the cam 8 pushes the first roller 6 and the second roller 7, thereby synchronously driving the first guide plate 3 and the second guide plate 4 to rotate and open around the shaft 5. During the process, the operator can directly observe the angle scale line 16 on the upper surface of the base plate 2 to confirm the opening and closing angle in real time. When the predetermined angle is reached, tighten the locking nut 10. Through the limiting cooperation between the stop block 11 and the base plate 2, the locking screw 9 is fixed, preventing the cam 8 from rotating, thus locking the positions of the first guide plate 3 and the second guide plate 4.
[0030] During screening: When the material falls to the solid plate area 17 of the screen plate 1, the inverted V-shaped structure formed by the first guide plate 3 and the second guide plate 4 in the unfolded state uses the inclined outer side to guide the material to the screen areas 18 on both sides, so that the material that could not be screened because it fell to the solid plate area 17 can re-enter the screen area 18. Through vibration, fine particles can pass through the screen, which significantly improves the screening efficiency.
[0031] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: This technical solution drives the first and second rollers by rotating the cam, which in turn drives the first and second guide plates to rotate around the side hinge point, realizing the dynamic adjustment of their opening and closing angles. When the material falls into the solid plate area of the screen plate, the first and second guide plates, which are in the unfolded state, actively guide the material to the screen areas on both sides, allowing the material that was originally unable to be screened and was retained in the solid plate area to return to the effective screen surface, significantly improving the screening rate of fine particles. In summary, this device, by actively intervening in the material flow direction in the solid plate area of the screen plate, effectively eliminates the screening blind zone caused by the solid plate area during the screening process, avoids the accumulation and ineffective retention of material in non-screen areas, reduces the need for subsequent secondary screening of the material, and improves the overall screening efficiency and material handling capacity of the vibrating screen.
[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A flow guide device for a vibrating screen deck, comprising a base plate (2) which is fixed to the solid deck area (17) of the screen deck (1), characterized in that The base plate (2) is provided with a first guide plate (3) and a second guide plate (4). The side of the first guide plate (3) and the side of the second guide plate (4) are rotatably connected. A first roller (6) is fixed on the inner side of the first guide plate (3) and a second roller (7) is fixed on the inner side of the second guide plate (4). A cam (8) is provided between the first guide plate (3) and the second guide plate (4). The cam (8) is located above the base plate (2), and the outer peripheral surface of the cam (8) is in rolling contact with the first roller (6) and the second roller (7) respectively.
2. A chaffer guide according to claim 1, characterised in that A rotating shaft (5) is provided on the base plate (2). The axis of the rotating shaft (5) is perpendicular to the upper surface of the base plate (2). The lower end of the rotating shaft (5) passes through the base plate (2) and is fixedly connected to the solid plate area (17) of the sieve plate (1). The cylindrical surface of the rotating shaft (5) is rotatably connected to the side of the first guide plate (3) and the side of the second guide plate (4).
3. A chaffer guide according to claim 2, wherein, The bottom surfaces of the first guide plate (3) and the second guide plate (4) are both slidably attached to the upper surface of the base plate (2).
4. A chaffer guide according to claim 3, wherein, The first guide plate (3) and the second guide plate (4) form an inverted V-shaped structure, and the opening and closing angle of the first guide plate (3) and the second guide plate (4) is between 60-90°.
5. A chaffer guide according to claim 4, wherein, A locking screw (9) is provided on the base plate (2). The axis of the locking screw (9) is perpendicular to the upper surface of the base plate (2). The upper end of the locking screw (9) is fixedly connected to the lower end face of the cam (8). The lower end of the locking screw (9) passes through the solid plate area (17) of the base plate (2) and the sieve plate (1) and is threadedly connected to the locking nut (10).
6. A chaffer guide according to claim 5, wherein, A connecting rod (12) is provided above the cam (8). The axis of the connecting rod (12) coincides with the axis of the locking screw (9). The lower end of the connecting rod (12) is fixedly connected to the upper end face of the cam (8). A knob (13) is fixed at the upper end of the connecting rod (12).
7. A chaffer guide according to claim 6, wherein, The knob (13) has a concave arc (14) on its side.
8. The chaffer guide of claim 5, wherein, Two protrusions (15) are provided on the outer peripheral surface of the cam (8), and the two protrusions (15) are centrally symmetrical about the center point of the axis of the cam (8).
9. The chaffer guide of claim 1, wherein, Angle scale lines (16) are provided on the upper surface of the base plate (2).
10. The chaffer guide of claim 1, wherein, Both the outer surfaces of the first guide plate (3) and the second guide plate (4) are provided with wear-resistant coatings.