Same-hole different-frequency multistage screening device

Abstract

The invention provides a same-hole different-frequency multi-stage screening device, which belongs to the technical field of screening equipment, and comprises an obliquely arranged box body, a plurality of layers of parallel spaced screens, a vibration component corresponding to the screens, a buffer assembly between the screens and the box body, and a controller electrically connected with the vibration component, the box body is provided with a feeding port, each layer of screen cloth is provided with a discharging port, the controller can dynamically adjust the vibration frequency of each vibration component through an optimization algorithm, and the equivalent screening precision and the screening penetration rate of the corresponding screen cloth are changed. According to the same-hole different-frequency multi-stage screening device, same-hole different-frequency multi-stage screening can be achieved, the screening effect of each layer can be flexibly regulated and controlled, meanwhile, vibration transmission can be reduced through the buffer assembly, and equipment loss is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of sand screening equipment, and more specifically, it relates to a multi-stage screening device with the same aperture but different frequencies. Background Technology

[0002] The gyratory screen, a highly efficient precision screening device, is widely used in numerous industries such as mining, building materials, chemicals, food processing, and pharmaceuticals. Its core function is to accurately classify granular and powdery materials. By simulating the reciprocating gyratory motion of manual sieving, it causes the material to form a complex spiral trajectory on the screen surface, efficiently separating materials of different particle sizes. It is especially suitable for processing fine-grained materials that are prone to clogging and require high screening accuracy.

[0003] A traditional gyratory screen mainly consists of five parts: a screen box, screen mesh, vibration drive system, shock absorption device, and support base. The screen box has a multi-layered structure to support screens of different aperture sizes for multi-stage screening. The screen mesh is made of materials such as metal wire and synthetic fiber, depending on the particle size requirements of the material. The vibration drive system typically uses an eccentric block vibrating motor, which generates excitation force to drive the screen box in a reciprocating gyratory motion at a specific frequency. The working process is as follows: the material to be screened enters the upper screen surface through the feed inlet. Under the gyratory action of the screen box, the material spreads in a spiral motion along the screen surface. Particles smaller than the screen mesh aperture fall through the screen to the lower screen surface, while particles larger than the aperture move outwards along the screen surface to the discharge outlet. Through the step-by-step screening using multiple screens, the graded collection of materials of different particle sizes is finally completed.

[0004] After installation and commissioning, the output ratio of each particle size grade of a traditional multi-layer gyratory screen is entirely determined by the inherent particle size distribution of the feed material. The equipment can only passively perform analytical screening and cannot actively adjust the grading ratio. When producers need to adjust the particle size distribution of the final product according to market demand or production processes, the machine must be stopped and the corresponding screens must be replaced manually. This process is not only time-consuming and labor-intensive, severely disrupting production continuity and reducing production efficiency, but also significantly increases labor costs and equipment maintenance difficulty. Summary of the Invention

[0005] The purpose of this application is to provide a multi-stage screening device with the same aperture and different frequency to solve the technical problems of the existing multi-layer gyratory screen, which adopts a fixed aperture screen structure, and the product particle size output ratio depends entirely on the inherent particle size distribution of the feed, making it impossible to actively adjust the classification ratio; and the need to stop the machine and manually replace the screen to adjust the product particle size formula.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A multi-stage screening device with the same aperture but different frequencies is provided, comprising: The housing is fixedly installed on the equipment base by a bracket, and the housing is inclined; the top of the higher side of the housing is provided with a feed inlet; Multiple layers of screens are spaced apart in the vertical direction inside the box, and each layer of screens is parallel to the box; each layer of screens has a discharge port at the end near the lower side of the box; the aperture of the multiple layers of screens is the same. Multiple vibrating components correspond one-to-one with the multiple layers of screens, and each vibrating component is fixedly connected to the corresponding screen to transmit vibrational force to the corresponding screen. Multiple buffer components, each corresponding to one of the multiple layers of screens, are disposed between the corresponding screen and the housing; when the vibrating member drives the screen to vibrate, the buffer components are used to buffer the vibrational force transmitted from the screen to the housing; and A controller is mounted on the bracket and electrically connected to the signal input terminals of the plurality of the vibrating components; the controller is configured to: The vibration frequency of each vibration component is dynamically adjusted using a pre-stored optimization algorithm model. The controller sets different vibration frequencies for each of the vibrating components to change the equivalent screening accuracy and screening rate of the screen corresponding to each vibrating component.

[0007] In one possible implementation, the buffer component includes: Multiple damping seats are arranged around the periphery of the screen, and each damping seat is fixedly connected to the side wall of the housing; and Multiple buffer springs correspond one-to-one with multiple damping seats, and each buffer spring is disposed between the screen and the corresponding damping seat; both ends of each buffer spring are fixedly connected to the screen and the corresponding damping seat, respectively.

[0008] In one possible implementation, an adjusting bolt is provided between each of the buffer springs and the corresponding damping seat; one end of the adjusting bolt is threaded to the damping seat, and the other end is fixedly connected to the end of the buffer spring facing away from the screen. The spring force of the buffer spring can be adjusted by rotating the adjusting bolt.

[0009] In one possible implementation, the screen includes: A frame is disposed inside the housing and is arranged parallel to the housing; the frame and the inner wall of the housing are connected by the buffer assembly; and A mesh panel is disposed within the frame, and the mesh panel and the frame are connected by a detachable structure.

[0010] In one possible implementation, the detachable structure includes: Multiple latches are spaced apart circumferentially along the mesh panel; and Multiple quick-release clips are spaced apart along the circumference of the frame, and each of the multiple quick-release clips corresponds to one of the multiple latches; Each of the quick-release clips is detachably connected to the corresponding latch, and the mesh panel and the frame can be separated by opening multiple quick-release clips.

[0011] In one possible implementation, the frame is provided with multiple guide baffles, and the multiple guide baffles are alternately tilted along the tilting direction of the box.

[0012] In one possible implementation, the guide baffle and the frame are hinged together by a hinge axis.

[0013] In one possible implementation, the hinge axis is a locking bolt, which is threadedly connected to the frame; The locking bolt can be loosened to adjust the tilt angle of the guide baffle; and the locking bolt can be tightened to fix the position of the guide baffle.

[0014] In one possible implementation, the screening device further includes: A screen cleaning assembly is disposed inside the housing and is connected to the multi-layer screen; the screen cleaning assembly is electrically connected to the controller; the screen cleaning assembly is used to apply high-frequency vibration to the multi-layer screen. When multiple vibrating components stop working, the controller is adapted to control the screen cleaning assembly to start, so as to shake off the material on each layer of the screen.

[0015] In one possible implementation, the network clearing component includes: Multiple high-frequency vibrators correspond one-to-one with the multiple layers of screens. Each high-frequency vibrator is fixedly connected to the corresponding screen to apply high-frequency, low-amplitude vibration to the corresponding screen. Each high-frequency vibrator is electrically connected to the controller. When multiple vibrating components stop working, the controller is adapted to activate multiple high-frequency vibrators to shake off the material on each layer of the screen.

[0016] In this embodiment, the material to be screened is fed into the feed inlet on the higher side of the box. Utilizing the tilt angle of the box, the material slowly moves towards the lower side of the box under gravity, while simultaneously spreading evenly on the surface of the uppermost screen. The controller is powered on and, based on a pre-stored optimized algorithm model, assigns an initial vibration frequency (or an optimal frequency preset based on material characteristics and historical data) to each vibrating component. Each vibrating component begins to vibrate at an independent frequency, causing the corresponding screen to vibrate synchronously.

[0017] Each layer of screen generates differentiated vibration characteristics (such as vibration acceleration, amplitude, and vibration waveform) at a specific vibration frequency. By adjusting the frequency, the equivalent screening accuracy and screening rate can be changed. When vibrating at high frequency, the screen vibrates with a large acceleration, and the particles are subjected to a stronger inertial force, which can quickly shake off the particles stuck in the screen holes, while improving the screening efficiency of fine particles. At low frequencies, the screen amplitude is usually larger, which is suitable for processing larger particles, avoiding excessive passage of fine particles through the screen, and ensuring classification accuracy.

[0018] During the vibration process, particles that meet the screening requirements of the current layer pass through the screen holes and enter the next layer, while particles that do not meet the requirements move along the screen towards the discharge port and are eventually discharged from the discharge port of the corresponding layer.

[0019] The controller dynamically adjusts the vibration frequency of each vibrating component in real time through an optimized algorithm model: It can automatically adapt the vibration frequency of each screen layer according to parameters such as material flow rate, particle distribution changes, and screen load (based on real-time data if equipped with sensors, and on the optimization target preset by the algorithm if not). For example, when a layer of screen shows signs of clogging, the vibration frequency of that layer is increased to clear the screen holes; when the material is generally fine, the frequency of the upper screen is reduced to reduce excessive passage of fine particles and ensure stable grading accuracy.

[0020] After multiple screenings, materials of different particle sizes are discharged from the outlets of their respective screen layers, completing multi-stage precise separation and collection.

[0021] The multi-stage screening device with the same aperture and different frequency provided in this application, compared with the prior art, breaks through the limitation of traditional multi-stage screening relying on screens with different apertures. By adjusting the vibration frequency, it achieves dynamic changes in the equivalent screening accuracy and screening rate of screens with the same aperture. It can adapt to the screening needs of different materials or adjust the grading particle size without changing the screen, reducing the complexity of operation and equipment maintenance costs. For example, for the same batch of materials, different screening modes such as coarse and fine screening can be quickly switched to adapt to diverse production scenarios. Multi-layer screens operate synchronously, and multiple particle size levels can be separated in one feeding, which is several times more efficient than single-stage screening. The vibration frequency of each screen layer is independently controllable, and parameters can be precisely optimized for the characteristics of each layer of material, avoiding the interference of the upper layer vibration on the lower layer in traditional multi-stage screening, and ensuring the stability of the screening accuracy of each layer. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural diagram of the multi-stage sieving device with the same aperture and different frequencies provided in the embodiments of the present invention. Figure 1 ; Figure 2 This is a cross-sectional structural diagram of the multi-stage screening device with the same aperture and different frequencies provided in an embodiment of the present invention; Figure 3 A three-dimensional structural diagram of the multi-stage sieving device with the same aperture and different frequencies provided in the embodiment of the present invention. Figure 2 (For clarity, some structures have been omitted.) Figure 4 for Figure 3 Enlarged structural diagram of region A in the middle; Figure 5 for Figure 3 A magnified structural diagram of region B in the middle; Figure 6 A top view of the multi-stage sieving device with the same aperture and different frequencies provided in an embodiment of the present invention (some structures are omitted for clarity). Figure 7 For along Figure 6 Schematic diagram of the cross-sectional structure of the middle CC line; The following are the labeling elements in the figure: 1. Housing; 11. Support; 12. Feed inlet; 2. Screen; 21. Frame; 22. Mesh plate; 23. Discharge outlet; 3. Vibrating component; 4. Buffer assembly; 41. Damping seat; 42. Buffer spring; 43. Adjusting bolt; 5. Controller; 6. Detachable structure; 61. Lock; 62. Quick release clamp; 7. Guide baffle; 71. Locking bolt; 8. High-frequency vibrator. Detailed Implementation

[0024] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] 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.

[0026] 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 the present invention 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 the present invention.

[0027] 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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Please refer to the following: Figures 1 to 7 The multi-stage screening device with the same aperture and different frequencies provided in this application will now be described. The multi-stage screening device with the same aperture and different frequencies includes a housing 1, multiple layers of screens 2, multiple vibrating components 3, multiple buffer components 4, and a controller 5.

[0029] The box 1 is fixedly installed on the equipment foundation by the bracket 11, and the box 1 is set at an inclination; the top of the higher side of the box 1 is provided with a feed port 12. The material to be screened is put into the feed port 12 on the higher side of the box 1, and the material moves downward along the inclined box 1 by its own gravity.

[0030] The multi-layer screens 2 are spaced apart in the box 1 along the vertical direction, and each layer of screens 2 is parallel to the box 1; each layer of screens 2 has a discharge port 23 at the end near the lower side of the box 1; the mesh size of the multi-layer screens 2 is the same.

[0031] Multiple vibrating components 3 correspond one-to-one with the multi-layer screen 2. Each vibrating component 3 is fixedly connected to the corresponding screen 2 to transmit vibration force to the corresponding screen 2.

[0032] Multiple buffer components 4 correspond one-to-one with the multi-layer screen 2, and each buffer component 4 is set between the corresponding screen 2 and the box 1; when the vibrating component 3 drives the screen 2 to vibrate, the buffer component 4 is used to buffer the vibration force transmitted from the screen 2 to the box 1.

[0033] The controller 5 is mounted on the bracket 11 and is electrically connected to the signal input terminals of multiple vibrating components 3; the controller 5 is configured as follows: The vibration frequency of each vibration component 3 is dynamically adjusted using a pre-stored optimization algorithm model.

[0034] The controller 5 sets different vibration frequencies for each vibrating component 3 to change the equivalent screening accuracy and screening rate of the screen 2 corresponding to each vibrating component 3.

[0035] In this embodiment, the material to be screened is fed into the feed inlet 12 on the higher side of the housing 1. Due to the tilt angle of the housing 1, the material slowly moves towards the lower side of the housing 1 under gravity, while simultaneously spreading evenly on the surface of the uppermost screen 2. The controller 5 is powered on and, based on a pre-stored optimization algorithm model, assigns an initial vibration frequency (or an optimal frequency preset based on material characteristics and historical data) to each vibrating component 3. Each vibrating component 3 begins to vibrate at an independent frequency, causing the corresponding screen 2 to vibrate synchronously.

[0036] Each layer of screen 2 generates differentiated vibration characteristics (such as vibration acceleration, amplitude, and vibration waveform) at a specific vibration frequency, and the equivalent screening accuracy and screening rate are changed by adjusting the frequency: When vibrating at high frequency, the vibration acceleration of screen 2 is large, and the inertial force on the particles is stronger, which can make the particles stuck in the screen holes fall off quickly, while improving the screening efficiency of fine particles. At low frequency vibration, the amplitude of screen 2 is usually larger, which is suitable for processing larger particles, avoiding excessive passage of fine particles through the screen, and ensuring classification accuracy.

[0037] During the vibration process, particles that meet the screening requirements of the current layer pass through the screen holes and enter the next layer, while particles that do not meet the requirements move along the screen 2 towards the discharge port 23 and are eventually discharged from the discharge port 23 of the corresponding layer.

[0038] Controller 5 dynamically adjusts the vibration frequency of each vibrating component 3 in real time through an optimized algorithm model: The vibration frequency of each layer of screen 2 can be automatically adapted based on parameters such as material flow rate, particle distribution changes, and screen 2 load (if equipped with sensors, it is based on real-time data; otherwise, it is based on the optimization target preset by the algorithm). For example, when a certain layer of screen 2 shows a tendency to clog, the vibration frequency of that layer is increased to clear the screen holes; when the material is generally too fine, the frequency of the upper screen 2 is reduced to reduce the excessive passage of fine particles through the screen and ensure stable grading accuracy.

[0039] After multiple screenings, materials of different particle sizes are discharged from the outlet 23 of the corresponding screen 2, completing multi-stage precise separation and collection.

[0040] The multi-stage screening device with the same aperture and different frequency provided in this application, compared with the prior art, breaks through the limitation of traditional multi-stage screening relying on screens with different apertures 2. By adjusting the vibration frequency, it achieves dynamic changes in the equivalent screening accuracy and screening rate of screens with the same aperture 2. It can adapt to the screening needs of different materials or adjust the grading particle size without replacing screens 2, reducing the complexity of operation and equipment maintenance costs. For example, for the same batch of materials, different screening modes such as coarse and fine screening can be quickly switched to adapt to diverse production scenarios. Multiple screens 2 operate synchronously, and multiple particle size levels can be separated in one feeding, which is several times more efficient than single-stage screening. The vibration frequency of each screen 2 is independently controllable, and the parameters can be precisely optimized for the material characteristics of each layer, avoiding the interference of the upper layer vibration on the lower layer in traditional multi-stage screening, and ensuring the stability of the screening accuracy of each layer.

[0041] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage screening device with the same hole and different frequency provided by the present invention, the buffer assembly 4 includes multiple damping seats 41 and multiple buffer springs 42.

[0042] Multiple damping seats 41 are arranged around the periphery of the screen 2, and each damping seat 41 is fixedly connected to the inner wall of the box 1.

[0043] Multiple buffer springs 42 correspond one-to-one with multiple damping seats 41, and each buffer spring 42 is disposed between the screen 2 and the corresponding damping seat 41; both ends of each buffer spring 42 are fixedly connected to the screen 2 and the corresponding damping seat 41 respectively.

[0044] Multiple damping seats 41 are fixedly installed around the periphery of the screen 2 on the inner wall of the housing 1. Then, one end of multiple buffer springs 42 is fixedly connected to the screen 2, and the other end is fixedly connected to the corresponding damping seat 41. When the vibrating component 3 drives the screen 2 to vibrate, the vibration force generated by the screen 2 is transmitted to the buffer springs 42. The buffer springs 42 absorb and buffer the vibration energy through their own elastic deformation, reducing the vibration force transmitted from the screen 2 to the housing 1.

[0045] The buffer component 4 can reduce the impact of the vibration of the screen 2 on the housing 1, reduce powder flying and leakage, and ensure the cleanliness of the production environment and the quality of pharmaceutical products.

[0046] By adopting the above technical solution, the buffer component 4 can effectively buffer the vibration force transmitted from the screen 2 to the housing 1, reduce the vibration wear of the housing 1 and other components, and extend the service life of the equipment. It also reduces the impact of vibration on the screen 2, keeping the screen 2 in a relatively stable state during the screening process and improving the stability and consistency of the screening effect.

[0047] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage screening device with the same hole and different frequency provided by the present invention, each buffer spring 42 and the corresponding damping seat 41 are provided with an adjusting bolt 43; one end of the adjusting bolt 43 is threadedly connected to the damping seat 41, and the other end is fixedly connected to the end of the buffer spring 42 facing away from the screen 2.

[0048] The spring force of the buffer spring 42 can be adjusted by rotating the adjusting bolt 43.

[0049] Identify the screen 2 where the spring force of the buffer spring 42 needs adjustment, and locate the corresponding adjusting bolt 43. Use a suitable tool to rotate the adjusting bolt 43. Since the adjusting bolt 43 is threadedly connected to the damping seat 41, rotating the adjusting bolt 43 changes the compression of the buffer spring 42, thereby adjusting the spring force of the buffer spring 42. After adjustment, start the vibration component 3 and observe the vibration and screening effect of the screen 2. Further fine-tune the adjusting bolt 43 according to actual needs until the ideal buffering effect is achieved.

[0050] When screening materials with different properties, the vibration characteristics of the screen 2 can be adapted to the screening requirements of different materials by adjusting the spring force of the buffer spring 42. For example, when screening highly viscous materials, the spring force of the buffer spring 42 can be appropriately increased to enhance the vibration intensity of the screen 2 and improve the material's screening rate; when screening fragile materials, the spring force of the buffer spring 42 can be reduced to decrease the vibration amplitude of the screen 2 and prevent material breakage.

[0051] With prolonged use of the equipment, the buffer spring 42 may experience elastic fatigue and a decrease in elastic force. By adjusting the adjusting bolt 43, the loss of elastic force in the buffer spring 42 can be compensated, ensuring the buffering effect of the buffer assembly 4 and maintaining the normal operation of the equipment.

[0052] By adopting the above technical solution, the elasticity of the buffer spring 42 can be flexibly adjusted according to different material characteristics and screening requirements, making the device adaptable to various screening scenarios. Regularly adjusting the elasticity of the buffer spring 42 can prevent elastic fatigue caused by the spring being in a fixed compressed state for a long time, thus extending the spring's service life.

[0053] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage sieving device with the same hole and different frequency provided by the present invention, the screen 2 includes a frame 21 and a screen plate 22.

[0054] The frame 21 is located inside the box 1 and is parallel to the box 1; the frame 21 and the inner wall of the box 1 are connected by a buffer assembly 4.

[0055] The mesh panel 22 is disposed inside the frame 21, and the mesh panel 22 and the frame 21 are connected by a detachable structure 6.

[0056] The screen plate 22 is installed inside the frame 21 via the detachable structure 6. The frame 21 is then placed inside the housing 1, parallel to the housing 1, and connected to the inner wall of the housing 1 via the buffer assembly 4. Materials are screened on the screen 22. Materials meeting the particle size requirements pass through the mesh of the screen plate 22, while materials not meeting the requirements move along the surface of the screen plate 22 to the discharge port 23 for discharge. When the screen plate 22 becomes worn or clogged, it is separated from the frame 21 via the detachable structure 6 for cleaning, repair, or replacement.

[0057] By adopting the above technical solution, the detachable structure 6 makes the replacement and maintenance of the screen 22 more convenient and quick, reducing equipment maintenance costs and downtime. The frame 21 is set parallel to the box body 1, ensuring the flatness and stability of the screen 2, which is beneficial to the screening and passage of materials and improves screening efficiency.

[0058] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage sieving device with the same hole and different frequency provided by the present invention, the detachable structure 6 includes multiple latches 61 and multiple quick-release clips 62.

[0059] Multiple latches 61 are spaced apart circumferentially along the mesh plate 22.

[0060] Multiple quick-release clips 62 are spaced apart along the circumference of the frame 21, and each quick-release clip 62 corresponds to a multiple latch 61. Each quick-release clip 62 is detachably connected to a corresponding latch 61, and the mesh panel 22 and the frame 21 can be separated by opening multiple quick-release clips 62.

[0061] Place the mesh panel 22 inside the frame 21, ensuring that each of the multiple latches 61 corresponds to one of the multiple quick-release clips 62. Then, connect each quick-release clip 62 to its corresponding latch 61 to secure the mesh panel 22 to the frame 21. When it is necessary to replace or maintain the mesh panel 22, open the multiple quick-release clips 62 to separate them from the latches 61, thus separating the mesh panel 22 from the frame 21.

[0062] The detachable structure 6 allows for easy removal of the screen plate 22 for cleaning, ensuring unobstructed flow of the screen 2 and improving production efficiency and quality.

[0063] By adopting the above technical solution, the quick-release clip 62 and the locking buckle 61 work together to achieve quick assembly and disassembly of the screen plate 22, improving the maintenance efficiency of the equipment. The connection method between the quick-release clip 62 and the locking buckle 61 can ensure the stability of the screen plate 22 during the screening process and prevent the screen plate 22 from loosening and affecting the screening effect.

[0064] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage screening device with the same hole and different frequency provided by the present invention, the frame 21 is provided with multiple guide baffles 7, and the multiple guide baffles 7 are alternately inclined along the inclined direction of the box body 1.

[0065] Multiple guide baffles 7 are alternately inclined within the frame 21 along the inclined direction of the box 1, so that when the material moves on the screen 2, it can be guided by the guide baffles 7, changing the flow direction and speed of the material. During the movement of the material on the screen 2, the guide baffles 7 make the material more evenly distributed on the screen 2, prolong the residence time of the material on the screen 2, and improve the screening effect of the material.

[0066] By adopting the above technical solution, the guide baffle 7 can guide the material to be evenly distributed on the screen 2, ensuring full contact between the material and the screen 2, thereby improving screening accuracy and efficiency. Changing the flow direction and speed of the material extends the residence time of the material on the screen 2, allowing sufficient time for screening and improving the screening pass rate.

[0067] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage screening device with the same hole and different frequency provided by the present invention, the guide baffle 7 and the frame 21 are hinged together by a hinge shaft.

[0068] Based on the material characteristics and screening requirements, rotate the guide baffle 7 and adjust its tilt angle to achieve the best material guidance and screening effect.

[0069] When screening materials with high moisture content, the materials are prone to caking and sticking together. By adjusting the inclination angle of the guide baffle 7, the flow rate and distribution of the material on the screen 2 can be changed, reducing caking and sticking and improving the screening effect. For example, increasing the inclination angle of the guide baffle 7 allows the material to flow quickly on the screen 2, preventing material accumulation and caking.

[0070] When screening fine materials, adjusting the tilt angle of the guide baffle 7 allows the material to move slowly on the screen 2, prolonging the contact time between the material and the screen 2, and improving the screening rate and screening accuracy of fine materials.

[0071] By adopting the above technical solution, the tilt angle of the guide baffle 7 can be flexibly adjusted according to the characteristics of different materials and screening requirements, making the device adaptable to various screening scenarios. By adjusting the angle of the guide baffle 7, the flow state of the material on the screen 2 can be optimized, improving the uniformity of material distribution and screening rate, thereby improving the screening effect.

[0072] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage screening device with the same hole and different frequency provided by the present invention, the hinge shaft is a locking bolt 71, and the locking bolt 71 is threadedly connected to the frame 21.

[0073] The guide baffle 7 can be adjusted by loosening the locking bolt 71; and the position of the guide baffle 7 can be fixed by tightening the locking bolt 71.

[0074] Loosen the locking bolt 71 to allow the guide baffle 7 to rotate freely around the hinge axis, and adjust the tilt angle of the guide baffle 7 as needed. After adjustment, tighten the locking bolt 71 to ensure a tight threaded connection between the locking bolt 71 and the frame 21, thus fixing the position of the guide baffle 7.

[0075] In continuous screening operations, when material characteristics or screening requirements change, the angle of the guide baffle 7 can be quickly adjusted and fixed by the locking bolt 71 to ensure the continuity and stability of the screening process. For example, on an automated sand and gravel production line, when the particle size distribution of the sand and gravel raw materials changes, the operator can remotely adjust and lock the angle of the guide baffle 7 from the control room without stopping the machine for adjustment, thus improving production efficiency.

[0076] By adopting the above technical solution, the locking bolt 71 is threadedly connected to the frame 21, which can firmly fix the position of the guide baffle 7, prevent the angle of the guide baffle 7 from changing during the screening process, and ensure the stability of the screening effect. Loosening and tightening the locking bolt 71 is simple and convenient, and the angle of the guide baffle 7 can be quickly adjusted and fixed.

[0077] Further, please refer to Figures 1 to 7As a specific embodiment of the multi-stage screening device with the same aperture and different frequency provided by the present invention, the screening device also includes a screen cleaning component.

[0078] The screen cleaning assembly is installed inside the housing 1 and is connected to the multi-layer screen 2; the screen cleaning assembly is electrically connected to the controller 5; the screen cleaning assembly is used to apply high-frequency vibration to the multi-layer screen 2.

[0079] When multiple vibrating components 3 stop working, the controller 5 is adapted to control the start of the screen cleaning assembly to shake off the material on each layer of screen 2.

[0080] When multiple vibrating components 3 stop working, the controller 5 detects the stop signal of the vibrating components 3 and starts the screen cleaning assembly. The screen cleaning assembly applies high-frequency vibration to the multi-layer screen 2, shaking off the residual material on each layer of screen 2 to prevent material from clogging the screen 2. After the screen cleaning assembly has been working for a period of time, the controller 5 controls the screen cleaning assembly to stop working, completing the screen cleaning process.

[0081] When screening materials with high dust content in mines, screen 2 is easily clogged by dust. By using this screen cleaning component, after the vibrating component 3 stops working, the screen cleaning component is activated to apply high-frequency vibration, which can effectively shake off the dust on screen 2, ensuring the screen 2 is unobstructed and improving screening efficiency.

[0082] By adopting the above technical solution, the screen cleaning component can promptly shake off the material on the screen 2, preventing material blockage and ensuring the screening rate and efficiency of the screen 2. It also reduces material residue and accumulation on the screen 2, decreasing wear and corrosion and extending the service life of the screen 2.

[0083] Further, please refer to Figures 1 to 7 As a specific embodiment of the multi-stage screening device with the same hole and different frequency provided by the present invention, the screen cleaning component includes multiple high-frequency vibrators 8.

[0084] Multiple high-frequency vibrators 8 correspond one-to-one with the multi-layer screen 2. Each high-frequency vibrator 8 is fixedly connected to the corresponding screen 2 to apply high-frequency low-amplitude vibration to the corresponding screen 2. Each high-frequency vibrator 8 is electrically connected to the controller 5.

[0085] When multiple vibrating components 3 stop working, the controller 5 is adapted to control multiple high-frequency vibrators 8 to start, so as to shake off the material on each layer of screen 2.

[0086] When the vibrating component 3 stops working, the controller 5 controls multiple high-frequency vibrators 8 to start, applying high-frequency, low-amplitude vibration to the corresponding screen 2, shaking the material off the screen 2. After the screen is cleaned, the controller 5 controls the high-frequency vibrators 8 to stop working.

[0087] In fine chemical production, when screening fine chemical raw materials, the small particle size of the raw materials can easily clog the screen 2. The high-frequency, low-amplitude vibration generated by the high-frequency vibrator 8 can effectively shake off the raw material particles on the screen 2, preventing clogging and ensuring screening accuracy and efficiency.

[0088] By adopting the above technical solution, high-frequency, low-amplitude vibration can effectively shake off materials on the screen 2, especially fine particles and materials stuck in the mesh, resulting in a significant screen cleaning effect. Each high-frequency vibrator 8 corresponds to one layer of screen 2, allowing for independent cleaning of each layer of screen 2, thus improving the targeting and efficiency of the cleaning process.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage sieving device with the same aperture but different frequencies, characterized in that, include: The housing is fixedly installed on the equipment base by a bracket, and the housing is inclined; the top of the higher side of the housing is provided with a feed inlet; Multiple layers of screens are spaced apart in the vertical direction inside the box, and each layer of screens is parallel to the box; each layer of screens has a discharge port at the end near the lower side of the box; the aperture of the multiple layers of screens is the same. Multiple vibrating components correspond one-to-one with the multiple layers of screens, and each vibrating component is fixedly connected to the corresponding screen to transmit vibrational force to the corresponding screen. Multiple buffer components are provided, each corresponding to one of the multiple layers of screens. Each buffer component is disposed between the corresponding screen and the housing. When the vibrating component drives the screen to vibrate, the buffer component is used to buffer the vibration force transmitted from the screen to the housing. as well as A controller is mounted on the bracket and electrically connected to the signal input terminals of the plurality of the vibrating components; the controller is configured to: The vibration frequency of each vibration component is dynamically adjusted using a pre-stored optimization algorithm model. The controller sets different vibration frequencies for each of the vibrating components to change the equivalent screening accuracy and screening rate of the screen corresponding to each vibrating component.

2. The multi-stage screening device with the same aperture and different frequencies as described in claim 1, characterized in that, The buffer component includes: Multiple damping seats are arranged around the periphery of the screen, and each damping seat is fixedly connected to the side wall of the housing; and Multiple buffer springs correspond one-to-one with multiple damping seats, and each buffer spring is disposed between the screen and the corresponding damping seat; both ends of each buffer spring are fixedly connected to the screen and the corresponding damping seat, respectively.

3. The multi-stage screening device with the same aperture and different frequencies as described in claim 2, characterized in that, An adjusting bolt is also provided between each buffer spring and the corresponding damping seat; one end of the adjusting bolt is threaded to the damping seat, and the other end is fixedly connected to the end of the buffer spring facing away from the screen. The spring force of the buffer spring can be adjusted by rotating the adjusting bolt.

4. The multi-stage screening device with the same aperture and different frequencies as described in claim 1, characterized in that, The screen includes: A frame is disposed inside the housing and is arranged parallel to the housing; the frame and the inner wall of the housing are connected by the buffer assembly; and A mesh panel is disposed within the frame, and the mesh panel and the frame are connected by a detachable structure.

5. The multi-stage screening device with the same aperture and different frequencies as described in claim 4, characterized in that, The detachable structure includes: Multiple latches are spaced apart circumferentially along the mesh panel; and Multiple quick-release clips are spaced apart along the circumference of the frame, and each of the multiple quick-release clips corresponds to one of the multiple latches; Each of the quick-release clips is detachably connected to the corresponding latch, and the mesh panel and the frame can be separated by opening multiple quick-release clips.

6. The multi-stage screening device with the same aperture and different frequencies as described in claim 4, characterized in that, The frame is provided with multiple guide baffles, and the multiple guide baffles are alternately tilted along the tilting direction of the box body.

7. The multi-stage screening device with the same aperture and different frequencies as described in claim 6, characterized in that, The guide baffle and the frame are hinged together by a hinge shaft.

8. The multi-stage screening device with the same aperture and different frequencies as described in claim 7, characterized in that, The hinge shaft is a locking bolt, and the locking bolt is threadedly connected to the frame; The locking bolt can be loosened to adjust the tilt angle of the guide baffle; and the locking bolt can be tightened to fix the position of the guide baffle.

9. The multi-stage screening device with the same aperture and different frequencies as described in claim 1, characterized in that, The screening device further includes: A screen cleaning assembly is disposed inside the housing and is connected to the multi-layer screen; the screen cleaning assembly is electrically connected to the controller; the screen cleaning assembly is used to apply high-frequency vibration to the multi-layer screen. When multiple vibrating components stop working, the controller is adapted to control the screen cleaning assembly to start, so as to shake off the material on each layer of the screen.

10. The multi-stage screening device with the same aperture and different frequencies as described in claim 9, characterized in that, The network cleaning component includes: Multiple high-frequency vibrators correspond one-to-one with the multiple layers of screens. Each high-frequency vibrator is fixedly connected to the corresponding screen to apply high-frequency, low-amplitude vibration to the corresponding screen. Each high-frequency vibrator is electrically connected to the controller. When multiple vibrating components stop working, the controller is adapted to activate multiple high-frequency vibrators to shake off the material on each layer of the screen.

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