Self-cleaning screening device for lime production
The sliding plug-in screen plate and automatic cleaning mechanism solve the problem of screen plate blockage and shutdown in lime production, realize the efficient and continuous operation of the screening device, simplify the process flow, and reduce maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI XIANGJINCHAO ENV PROTECTION TECH CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-30
AI Technical Summary
In the existing lime production process, the screening device needs to be stopped and manually cleaned due to screen plate blockage, which leads to low production continuity and efficiency, and increases equipment maintenance costs.
The system adopts a sliding plug-in screen plate structure and two sets of cleaning mechanisms to achieve automated cleaning of the screen plate, avoiding equipment downtime and frequent manual disassembly. The system uses a lifting mechanism and a knocking roller to clean the clogged screen plate.
It improves screening efficiency and equipment continuous operation capability, simplifies the process flow, and reduces labor costs and equipment maintenance expenses.
Smart Images
Figure CN224423513U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of screening equipment technology, and more specifically, it relates to a self-cleaning screening device for lime production. Background Technology
[0002] In the lime production process, screening equipment is one of the core pieces of equipment for raw material processing and finished product grading. Its main function is to classify lime raw materials (such as limestone crushed material) by particle size through screen plates, separating materials that meet the process requirements (such as fine powder, medium particles, or coarse lumps), ensuring the stability of subsequent crushing, calcination, and other processes and the quality of the product.
[0003] Currently, due to the viscosity of lime raw materials and the tendency of fine particles to become embedded in the gaps between screen holes during screening, the effective screening area of the screen plate will decrease significantly or even become completely ineffective after long-term operation. In this case, the operator needs to stop the operation of the screening equipment, wait for the equipment to cool down and the power to be turned off, and then enter the screening chamber to manually scrape off the blockages on the surface of the screen plate and inside the screen holes using tools.
[0004] The inventors discovered that manually cleaning the screen plates during shutdowns increases labor costs and intensity. More importantly, frequent shutdowns disrupt the screening process, directly reducing the continuity and efficiency of lime production. Furthermore, repeated starting and stopping of the screening equipment can accelerate the wear and tear on mechanical parts, further increasing maintenance costs. Utility Model Content
[0005] The purpose of this application is to provide a self-cleaning screening device for lime production, so as to solve the technical problem that the existing screening equipment adopts the method of manually cleaning the screen plate by stopping the machine, which reduces the continuity and efficiency of lime production, and the repeated shutdowns easily increase the equipment maintenance costs.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0007] A self-cleaning screening device for lime production is provided, comprising:
[0008] The screen box has a hollow internal structure and has a feed inlet, a discharge outlet, and multiple mounting holes arranged in parallel along the vertical direction. Each mounting hole penetrates the screen box horizontally.
[0009] Multiple sieve plates are slidably inserted into multiple mounting holes, one-to-one, so that part of them are inside the sieve box and part of them are outside the sieve box; and
[0010] Two sets of cleaning mechanisms are respectively arranged on both sides of the screen box facing the mounting hole axially, for cleaning the protruding part of either of the screen plates.
[0011] In one possible implementation, the cleaning mechanism includes:
[0012] A mounting base is disposed on one side of the screen box facing the mounting hole axially, and is drivenly connected to a lifting mechanism for moving it vertically; and
[0013] Multiple striking rollers are arranged side by side in a horizontal direction on the mounting base, and are all eccentrically rotatably connected to the mounting base; and the multiple striking rollers are drively connected to a driving component.
[0014] In one possible implementation, the lifting mechanism includes:
[0015] A support base is disposed below the mounting base, and the mounting base is adapted to move vertically relative to the support base; and
[0016] At least one first linear cylinder is mounted on the support base, with its power output axis parallel to the vertical direction, and the power output end of the first linear cylinder is connected to the mounting base.
[0017] In one possible implementation, the driving component includes:
[0018] Multiple first sprockets correspond one-to-one with multiple striking rollers; each first sprocket is coaxially arranged with the eccentric shaft of the corresponding striking roller;
[0019] A second sprocket is rotatably mounted on the mounting base, and the rotation axis of the second sprocket is parallel to the rotation axis of the striking roller; the second sprocket is driven by a drive motor to rotate the second sprocket about its own axis; and
[0020] A chain is fitted around the outer periphery of a plurality of first sprockets and second sprockets so that when the second sprocket rotates, the plurality of first sprockets rotate synchronously.
[0021] In one possible implementation, the striking roller has a plurality of hammers spaced apart along its circumference.
[0022] In one possible implementation, the sieve plate is driven by a push-pull mechanism for moving it, the push-pull mechanism comprising:
[0023] A fixing seat is provided on one side of the screen box facing the mounting hole axially;
[0024] A second linear cylinder is mounted on the fixed base; the power output axis of the second linear cylinder is parallel to the axis of the mounting hole, and the power output end of the second linear cylinder is connected to the sieve plate.
[0025] In one possible implementation, the push-pull mechanism is provided in two sets, with the two sets of push-pull mechanisms respectively located on both sides of the screen box;
[0026] Each of the second linear cylinders is connected to the screen plate via a flexible connector.
[0027] In one possible implementation, the flexible connector includes:
[0028] Two connecting plates are respectively installed at the power output end of the second linear cylinder and on the sieve plate; and
[0029] Multiple flexible strips are disposed between the two connecting plates, and each flexible strip is connected to both ends of the two connecting plates respectively.
[0030] In one possible implementation, the base has multiple buffer springs at its bottom.
[0031] In one possible implementation, each of the sieve plates has multiple sieve holes, and the diameter of the sieve holes gradually decreases from top to bottom.
[0032] In this embodiment, lime raw material enters the hollow screen box through the feed inlet and is graded and screened by multiple screen plates (partially inserted into the screen box and partially extended out) installed side by side in the vertical direction. The screened material is discharged through the discharge outlet. When the screen plates need to be cleaned due to material blockage, some screen plates inside the screen box are moved to the outside, and screen plates outside the screen box are moved to the inside. Two sets of cleaning mechanisms located on both sides of the screen box are activated to clean the blocked screen plates extending out of the screen box, ensuring that the screen plates continue to work effectively.
[0033] The self-cleaning screening device for lime production provided in this application embodiment, compared with the prior art, achieves the flexibility of screen plate pull-out maintenance through the sliding insertion screen plate structure; two sets of cleaning mechanisms cover the protruding parts on both sides of the screen plate, which can specifically clean the blocked materials, avoid the problems of equipment downtime and frequent manual disassembly and cleaning, improve screening efficiency and equipment continuous operation capability; the multi-layer screen plates are arranged side by side, which can simultaneously complete multi-stage screening and simplify the process flow. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0035] Figure 1A three-dimensional structural schematic diagram of a self-cleaning screening device for lime production provided in an embodiment of this application;
[0036] Figure 2 A top view of the self-cleaning screening device for lime production provided in an embodiment of this application;
[0037] Figure 3 This is a three-dimensional structural diagram of the cleaning mechanism used in the embodiments of this application;
[0038] Figure 4 This is a top view of the cleaning mechanism used in the embodiments of this application;
[0039] Figure 5 This is a three-dimensional structural diagram of the sieve box used in the embodiments of this application;
[0040] The following are the labeling elements in the figure:
[0041] 1. Screen box; 11. Mounting hole; 2. Screen plate; 21. Screen hole; 3. Cleaning mechanism; 31. Mounting seat; 32. Striking roller; 321. Hammer; 4. Lifting mechanism; 41. Support seat; 42. First linear cylinder; 5. Drive component; 51. First sprocket; 52. Second sprocket; 53. Chain; 54. Drive motor; 6. Push-pull mechanism; 61. Fixed seat; 611. Buffer spring; 62. Second linear cylinder; 7. Flexible connector; 71. Connecting plate; 72. Flexible belt. Detailed Implementation
[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0046] Please refer to the following: Figures 1 to 5 The self-cleaning screening device for lime production provided in this application will now be described. The self-cleaning screening device for lime production includes a screen box 1, multiple screen plates 2, and two sets of cleaning mechanisms 3.
[0047] The screen box 1 has a hollow internal structure and has a feed inlet, a discharge outlet, and multiple mounting holes 11 arranged in parallel along the vertical direction. Each mounting hole 11 penetrates the screen box 1 horizontally. The screen box 1 can be made of corrosion-resistant stainless steel (such as 304 stainless steel) to adapt to the high dust and high humidity environment in lime production. The number of screen plates 2 can be increased to multiple layers according to actual needs to further refine the screening grades. A guide plate can be added to the feed inlet to guide the material to be evenly distributed on the screen plates 2 and avoid local accumulation.
[0048] Multiple screen plates 2 are slidably inserted into multiple mounting holes 11 in a one-to-one correspondence, so that part of them are inside the screen box 1 and part of them are outside the screen box 1.
[0049] Two sets of cleaning mechanisms 3 are respectively set on both sides of the screen box 1 facing the mounting hole 11 axially, for cleaning the protruding part of either screen plate 2.
[0050] In this embodiment, lime raw material enters the hollow screen box 1 through the feed inlet and is graded and screened by multiple screen plates 2 installed side by side in the vertical direction (some extending into the screen box 1 and some extending out of the screen box 1). The screened material is discharged through the discharge outlet. When the screen plates 2 need to be cleaned due to material blockage, some screen plates 2 inside the screen box 1 are moved to the outside of the screen box 1, and the screen plates 2 outside the screen box 1 are moved to the inside of the screen box 1. Two sets of cleaning mechanisms 3 set on both sides of the screen box 1 are activated to clean the blocked screen plates 2 extending out of the screen box 1, ensuring that the screen plates 2 continue to work effectively.
[0051] The self-cleaning screening device for lime production provided in this application embodiment, compared with the prior art, achieves the flexibility of pull-out maintenance of the screen plate 2 through the sliding insertion structure; two sets of cleaning mechanisms 3 cover the protruding parts on both sides of the screen plate 2, which can specifically clean the blocked materials, avoid the problems of equipment downtime and frequent manual disassembly and cleaning, improve screening efficiency and equipment continuous operation capability; the multi-layer screen plates 2 are arranged side by side, which can simultaneously complete multi-stage screening and simplify the process flow.
[0052] In some embodiments, the cleaning mechanism 3 described above may employ, for example... Figure 1 , Figure 3 and Figure 4 The structure shown is described in the following document. Figure 1 , Figure 3 and Figure 4 The cleaning mechanism 3 includes a mounting base 31 and multiple striking rollers 32.
[0053] Mounting base 31 is located on one side of screen box 1 facing mounting hole 11 axially, and is connected to lifting mechanism 4 for driving it to move in the up and down direction.
[0054] Multiple striking rollers 32 are arranged side by side in the horizontal direction on the mounting base 31, and are all eccentrically rotatably connected to the mounting base 31; and the multiple striking rollers 32 are connected to a driving member 5 for transmission.
[0055] The lifting mechanism 4 drives the mounting base 31 to move up and down, so that the multiple striking rollers 32 on the mounting base 31 are aligned with the protruding part of the screen plate 2 that needs to be cleaned; the driving component 5 is started, driving the multiple striking rollers 32 to rotate eccentrically, and the impact force generated by the rotation vibrates and cleans the blockage material on the surface of the screen plate 2. At the same time, the movement of the lifting mechanism 4 makes the striking rollers 32 cover the entire length of the screen plate 2, ensuring that there are no dead corners in the cleaning.
[0056] The mounting base 31 can be equipped with an angle adjustment device (such as a hydraulic rotary joint) to make the striking roller 32 at a certain angle to the surface of the screen plate 2, thereby increasing the striking force; the drive component 5 can adopt a multi-motor redundancy design to avoid cleaning interruption caused by single motor failure; the surface of the striking roller 32 can be sprayed with a wear-resistant coating (such as tungsten carbide) to extend its service life.
[0057] The eccentrically rotating striking roller 32 can generate periodic vibrations, effectively peeling off the lime material adhering to the surface of the screen plate 2; the lifting mechanism 4 allows the cleaning mechanism 3 to move along the length of the screen plate 2 to adapt to the cleaning needs of different positions; multiple striking rollers 32 are arranged in parallel, which can clean multiple screen plates 2 (or different areas of the same screen plate 2) at the same time, improving cleaning efficiency.
[0058] In some embodiments, the lifting mechanism 4 described above can be as follows: Figure 1 The structure shown is described in the following document. Figure 1 The lifting mechanism 4 includes a support base 41 and at least one first linear cylinder 42.
[0059] The support base 41 is disposed below the mounting base 31, and the mounting base 31 is adapted to move in the vertical direction relative to the support base 41.
[0060] At least one first linear cylinder 42 is mounted on the support base 41, with its power output axis parallel to the vertical direction, and the power output end of the first linear cylinder 42 is connected to the mounting base 31.
[0061] The first linear cylinder 42 is activated, and its power output end extends and retracts in the vertical direction, pushing the mounting base 31 to move up and down relative to the support base 41. By controlling the extension and retraction stroke of the cylinder, the position of the mounting base 31 is precisely adjusted so that the height of the striking roller 32 is aligned with the protruding part of the screen plate 2, thus completing the positioning of the cleaning position.
[0062] The first linear cylinder 42 can be replaced with an electric screw lifting mechanism 4, which drives the screw to rotate via a servo motor, achieving more precise position control and is suitable for scenarios with extremely high requirements for cleaning position. A guide rail slider pair can be added between the support base 41 and the mounting base 31 to further improve the stability of the lifting process.
[0063] The first linear cylinder 42 has a simple structure and fast response speed, enabling rapid lifting and lowering of the mounting base 31; the support base 41 provides stable support for the mounting base 31, preventing shaking during lifting and ensuring the alignment accuracy between the striking roller 32 and the screen plate 2; the cylinder drive method is easy to integrate with the control system (such as PLC) to achieve automated lifting and lowering control.
[0064] In some embodiments, the driving member 5 may be as follows: Figure 1 , Figure 3 and Figure 4 The structure shown is described in the following document. Figure 1 , Figure 3 and Figure 4 The drive component 5 includes multiple first sprockets 51, second sprockets 52 and chains 53.
[0065] Multiple first sprockets 51 correspond one-to-one with multiple striking rollers 32; each first sprocket 51 is coaxially arranged with the eccentric shaft of the corresponding striking roller 32.
[0066] The second sprocket 52 is rotatably mounted on the mounting base 31, and the rotation axis of the second sprocket 52 is parallel to the rotation axis of the striking roller 32; the second sprocket 52 is connected to a drive motor 54 so that the second sprocket 52 rotates around its own axis.
[0067] The chain 53 is fitted around the outer periphery of multiple first sprockets 51 and second sprockets 52 so that when the second sprocket 52 rotates, the multiple first sprockets 51 rotate synchronously.
[0068] The drive motor 54 starts, driving the second sprocket 52 to rotate; the second sprocket 52 drives multiple first sprockets 51 to rotate synchronously through the chain 53. Since the first sprockets 51 are coaxially set with the eccentric shaft of the striking roller 32, the synchronous eccentric rotation of multiple striking rollers 32 is finally achieved; the chain 53 transmission ensures that the speed of each striking roller 32 is consistent, avoiding uneven cleaning effect due to speed difference.
[0069] The sprocket chain 53 can be replaced with a synchronous belt drive, which achieves synchronous drive through the meshing of the toothed belt and the pulley, reducing transmission noise; a tensioning device (such as a spring tensioning wheel) can be added to the second sprocket 52 to prevent transmission failure caused by the loosening of the chain 53; the drive motor 54 can be a variable frequency motor, which controls the vibration frequency of the striking roller 32 by adjusting the speed to adapt to the cleaning needs of different viscous materials.
[0070] The sprocket and chain 53 transmission structure is compact and has high transmission efficiency, and can withstand large impact loads (adapting to the vibration environment in lime production); multiple striking rollers 32 rotate synchronously, which can form a uniform vibration cleaning force on the screen plate 2, avoiding local over- or under-cleaning; the drive motor 54 only needs to drive one second sprocket 52 to link multiple striking rollers 32, reducing the complexity of the power system.
[0071] In some embodiments, the aforementioned striking roller 32 may be as follows: Figure 1 , Figure 3 and Figure 4 The structure shown is described in the following document. Figure 1 , Figure 3 and Figure 4 The striking roller 32 has a plurality of hammers 321 spaced apart along its circumference.
[0072] When the striking roller 32 rotates eccentrically, multiple hammers 321 arranged circumferentially impact the surface of the protruding part of the screen plate 2 periodically with the rotational motion; the hammers 321 loosen and fall off the blockage material (such as lime particles) on the screen plate 2 through impact vibration, and finally peel off from the surface of the screen plate 2.
[0073] Hammerhead 321 can adopt a detachable structure (such as bolt connection) to facilitate the replacement of hammerhead 321 with different shapes (such as conical, square) or materials (such as hard alloy, rubber) according to the material characteristics; the circumferential spacing between adjacent hammerheads 321 can be designed to be unequal to avoid resonance of sieve plate 2 caused by periodic impact.
[0074] The concentrated impact of the hammer 321 enhances the crushing ability of the sticky material, and the cleaning efficiency is significantly improved compared with the smooth roller without hammer 321; the circumferentially spaced hammer 321 avoids fatigue damage to the screen plate 2 caused by continuous impact; the eccentric rotation and the cooperation of the hammer 321 make the cleaning force have both vibration and impact effects, which can adapt to blockages of different hardness.
[0075] In some embodiments, the sieve plate 2 may be adopted as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The sieve plate 2 is connected to a push-pull mechanism 6 for driving its movement. The push-pull mechanism 6 includes a fixed base 61 and a second linear cylinder 62.
[0076] The fixing seat 61 is located on one side of the screen box 1 facing the mounting hole 11 axially.
[0077] The second linear cylinder 62 is mounted on the fixed base 61; the power output axis of the second linear cylinder 62 is parallel to the axis of the mounting hole 11, and the power output end of the second linear cylinder 62 is connected to the sieve plate 2.
[0078] The second linear cylinder 62 is activated, and its power output end extends and retracts along the axial (horizontal) direction of the mounting hole 11. Through its connection with the screen plate 2, it drives the screen plate 2 to slide within the mounting hole 11. When it is necessary to clean or replace the screen plate 2, the cylinder pushes part of the screen plate 2 out of the screen box 1, and the extended part of the screen plate 2 is used for the cleaning mechanism 3 to operate. During the screening operation, the cylinder pulls the screen plate 2 back into the screen box 1 to ensure that the screen plate 2 effectively covers the screening area.
[0079] The second linear cylinder 62 can be replaced with an electric push rod, which drives the lead screw to extend and retract via a motor, achieving more precise position control. This is suitable for scenarios where the extension length of the screen plate 2 needs to be precisely adjusted. A shock-absorbing pad (such as a rubber pad) can be added between the fixed base 61 and the screen box 1 to reduce the vibration transmission to the screen box 1 when the cylinder moves. A pressure sensor can be added to the power output end of the cylinder to monitor the thrust in real time and prevent overload from causing deformation of the screen plate 2.
[0080] The second linear cylinder 62 drives the screen plate 2 to slide, realizing the automatic adjustment of the position of the screen plate 2 (the push-pull speed is adjustable) and reducing manual intervention; the fixed seat 61 provides stable support for the cylinder and avoids the cylinder body from shaking during the transmission of thrust; the cylinder power output axis is parallel to the axis of the mounting hole 11, ensuring that the thrust direction is consistent with the sliding direction of the screen plate 2 and reducing friction loss.
[0081] In some embodiments, the push-pull mechanism 6 described above can be as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The push-pull mechanism 6 is provided in two sets, and the two sets of push-pull mechanisms 6 are respectively located on both sides of the screen box 1.
[0082] Each of the second linear cylinders 62 is connected to the screen plate 2 via a flexible connector 7 at its power output end.
[0083] The second linear cylinders 62 on both sides of the screen box 1 start synchronously, and apply pushing or pulling forces from both sides of the screen plate 2 through the flexible connector 7 respectively. Since the flexible connector 7 can buffer the instantaneous impact force, the coordinated action of the cylinders on both sides makes the screen plate 2 evenly stressed, avoiding jamming or deformation caused by unilateral stress. Under the push and pull of the cylinders on both sides, the screen plate 2 slides smoothly along the axial direction of the mounting hole 11.
[0084] The flexible connector 7 can be made of high-strength elastic rope (such as aramid fiber rope) to enhance the buffering performance while ensuring tensile strength; the second linear cylinders 62 on both sides can be controlled independently (such as the thrust of the second linear cylinder 62 on the left side being greater than that on the right side), which can adapt to the scenario where the friction on one side of the screen plate 2 increases due to long-term use; a rotary joint can be added to the connection point between the flexible connector 7 and the connecting plate 71 to allow the flexible belt 72 to swing within a certain angle, avoiding stress concentration caused by installation errors.
[0085] Two sets of push-pull mechanisms 6 drive the screen plate 2 synchronously from both sides, balancing the friction force when the screen plate 2 slides (single-sided drive is prone to jamming due to uneven friction force), improving the smoothness of sliding; the flexible connector 7 (such as flexible belt 72) can absorb the impact load when the cylinder starts / stops, reduce the rigid collision between the screen plate 2 and the mounting hole 11, and extend the service life of the equipment.
[0086] In some embodiments, the flexible connector 7 described above can be adopted as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The flexible connector 7 includes two connecting plates 71 and multiple flexible strips 72.
[0087] Two connecting plates 71 are respectively installed on the power output end of the second linear cylinder 62 and on the sieve plate 2.
[0088] Multiple flexible strips 72 are disposed between two connecting plates 71, and both ends of each flexible strip 72 are connected to the two connecting plates 71 respectively.
[0089] When the second linear cylinder 62 pushes or pulls the screen plate 2, the power is transmitted to the flexible belt 72 through the connecting plate 71. The flexible belt 72 undergoes elastic deformation (such as stretching or bending) under tension or pressure, buffering the instantaneous impact force between the cylinder and the screen plate 2. Finally, the flexible belt 72 transmits the driving force smoothly to another connecting plate 71, causing the screen plate 2 to slide.
[0090] The flexible strip 72 can adopt a multi-layer composite structure (such as a rubber layer + fiber reinforcement layer) to balance elasticity and strength; the number of flexible strips 72 can be adjusted according to the size of the screen plate 2, such as increasing the number of flexible strips 72 for large screen plates 2 and reducing the number of flexible strips 72 for small screen plates 2.
[0091] In some embodiments, the aforementioned fixing base 61 may be as follows: Figure 1 The structure shown is described in the following document. Figure 1 The bottom of the fixed base 61 has multiple buffer springs 611.
[0092] When the second linear cylinder 62 starts or stops, the cylinder body vibrates due to inertia (such as a horizontal impact). The vibration is transmitted to the buffer spring 611 through the fixed seat 61. The buffer spring 611 is compressed or stretched and deformed, absorbing the vibration energy. Finally, the vibration energy is converted into the elastic potential energy of the spring and gradually released, reducing the transmission of vibration to the equipment foundation or screen box 1.
[0093] The buffer spring 611 can be replaced with a hydraulic shock absorber, which absorbs vibration energy through liquid damping to achieve more efficient vibration attenuation; the number of buffer springs 611 can be increased according to the size of the fixed base 61, such as 4 buffer springs 611 symmetrically distributed to improve the uniformity of buffering.
[0094] The buffer spring 611 reduces vibration during the operation of the push-pull mechanism 6, improving the working environment; it also reduces vibration damage to the internal seals of the cylinder, thus reducing maintenance frequency.
[0095] In some embodiments, the sieve plate 2 may be adopted as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 Each sieve plate 2 has multiple sieve holes 21, and the diameter of the sieve holes 21 gradually decreases from top to bottom.
[0096] Material enters from the top screen plate 2 (with the largest aperture), large particles are intercepted and discharged from the discharge port; smaller particles fall through the screen holes 21 of the top screen plate 2 into the lower screen plate 2 (with the next smallest aperture) for further screening; and so on, until the smallest particles finally pass through the bottom screen plate 2 (with the smallest aperture), completing multi-stage grading screening; the material intercepted by each screen plate 2 is discharged from the corresponding discharge port.
[0097] The shape of the sieve hole 21 can be changed from round to square or rhomboid to meet the sieving requirements of flaky lime particles; the difference in aperture between two adjacent sieve plates 2 can be adjusted to meet different particle size classification requirements; an ultrasonic vibration device can be added to the bottom sieve plate 2 to prevent small particles from clogging the sieve hole 21.
[0098] The decreasing aperture of the screen 21 from top to bottom achieves graded screening from coarse to fine, avoiding ineffective accumulation of small particles on the large aperture screen plate 2; the multi-layer screen plates 2 operate simultaneously, which can complete the separation of materials of multiple specifications at one time, simplifying the subsequent sorting process; each layer of screen plate 2 screens independently, reducing the load on a single screen plate 2 and extending the service life of the screen plate 2.
[0099] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A self-cleaning screening device for lime production, characterized in that, include: The screen box has a hollow internal structure and has a feed inlet, a discharge outlet, and multiple mounting holes arranged in parallel along the vertical direction. Each mounting hole penetrates the screen box horizontally. Multiple sieve plates are slidably inserted into multiple mounting holes, one-to-one, so that part of them are inside the sieve box and part of them are outside the sieve box; and Two sets of cleaning mechanisms are respectively arranged on both sides of the screen box facing the mounting hole axially, for cleaning the protruding part of either of the screen plates.
2. The self-cleaning screening device for lime production according to claim 1, characterized in that, The cleaning mechanism includes: A mounting base is disposed on one side of the screen box facing the mounting hole axially, and is drivenly connected to a lifting mechanism for moving it vertically; and Multiple striking rollers are arranged side by side in a horizontal direction on the mounting base, and are all eccentrically rotatably connected to the mounting base; and the multiple striking rollers are drively connected to a driving component.
3. The self-cleaning screening device for lime production as described in claim 2, characterized in that, The lifting mechanism includes: A support base is disposed below the mounting base, and the mounting base is adapted to move vertically relative to the support base; and At least one first linear cylinder is mounted on the support base, with its power output axis parallel to the vertical direction, and the power output end of the first linear cylinder is connected to the mounting base.
4. The self-cleaning screening device for lime production as described in claim 2, characterized in that, The driving component includes: Multiple first sprockets correspond one-to-one with multiple striking rollers; each first sprocket is coaxially arranged with the eccentric shaft of the corresponding striking roller; A second sprocket is rotatably mounted on the mounting base, and the rotation axis of the second sprocket is parallel to the rotation axis of the striking roller; the second sprocket is driven by a drive motor to rotate the second sprocket about its own axis; and A chain is fitted around the outer periphery of a plurality of first sprockets and second sprockets so that when the second sprocket rotates, the plurality of first sprockets rotate synchronously.
5. The self-cleaning screening device for lime production as described in claim 2, characterized in that, The striking roller has a plurality of hammers spaced apart along its circumference.
6. The self-cleaning screening device for lime production as described in claim 1, characterized in that, The sieve plate is driven by a push-pull mechanism for moving it, the push-pull mechanism comprising: A fixing seat is provided on one side of the screen box facing the mounting hole axially; A second linear cylinder is mounted on the fixed base; the power output axis of the second linear cylinder is parallel to the axis of the mounting hole, and the power output end of the second linear cylinder is connected to the sieve plate.
7. The self-cleaning screening device for lime production as described in claim 6, characterized in that, The push-pull mechanism is provided in two sets, and the two sets of push-pull mechanisms are respectively located on both sides of the screen box; Each of the second linear cylinders is connected to the screen plate via a flexible connector.
8. The self-cleaning screening device for lime production as described in claim 7, characterized in that, The flexible connector includes: Two connecting plates are respectively installed at the power output end of the second linear cylinder and on the sieve plate; and Multiple flexible strips are disposed between the two connecting plates, and each flexible strip is connected to both ends of the two connecting plates respectively.
9. The self-cleaning screening device for lime production as described in claim 6, characterized in that, The base has multiple buffer springs at its bottom.
10. The self-cleaning screening device for lime production as described in claim 1, characterized in that, Each of the sieve plates has multiple sieve holes, and the diameter of the sieve holes gradually decreases from top to bottom.