A device for improving the anti-rotation of vibrating screens

Abstract

This utility model discloses a device for improving the anti-rotation of a vibrating screen. The device includes a vibrating screen mechanism and an early warning mechanism. The vibrating screen mechanism includes multiple screen frames, multiple screen meshes, multiple retaining rings, multiple washers, and multiple reflective stickers. The multiple screen frames are stacked sequentially, the screen meshes are placed between adjacent screen frames, and the screen meshes are used to filter powder. The washers are placed at the connection points of adjacent screen frames. The retaining rings surround the outer circumference of the screen frames and are located at the connection points of adjacent screen frames. The reflective stickers are attached to the retaining rings. The early warning mechanism includes a column, multiple reflective photoelectric devices, multiple relays, an alarm light, and a power supply. The extension direction of the column is the same as the stacking direction of the multiple screen frames. The multiple reflective photoelectric devices are spaced apart on the column, and each reflective photoelectric device corresponds to a reflective sticker. The power supply is electrically connected to the alarm light through the relays, and the power supply is electrically connected to the reflective photoelectric devices through the relays. The reflective photoelectric devices are electrically connected to the alarm light through the relays.

Description

Technical Field

[0001] This utility model relates to the technical field of vibrating screen anti-rotation improvement device, and in particular to a vibrating screen anti-rotation improvement device. Background Technology

[0002] Lithium-ion battery cathode powder has extremely stringent requirements for impurity control, and multi-layer vibrating screens are commonly used on production lines for particle size classification and foreign object interception. Existing vibrating screen equipment typically consists of multiple stacked screen frames and mesh frames, secured and limited by clamping rings or clamps on the outer periphery, with gaskets placed at adjacent locations for sealing and vibration damping. However, under long-term high-frequency vibration and periodic maintenance and cleaning, structural defects gradually become apparent: on the one hand, powder easily accumulates and leaks in the gaps between the screen frame and mesh frame, creating dead zones and forcing operators to frequently clean the screen surface manually; on the other hand, during manual disassembly and repeated clamping, the gaskets at the bottom of the clamping rings are prone to aging and breakage, or insufficient clamping force may result from insufficient tightening of the clamps by employees. These factors can cause relative micro-movements or even rotation between the clamping rings and the screen frame, leading to abnormal wear of the screen frame, clamping rings, and metal connectors. There is a risk of grinding debris or metal powder contaminating the material, making it difficult to guarantee the cleanliness of the incoming material and affecting the quality of subsequent electrode preparation.

[0003] Existing technologies mostly rely on passive friction clamping and regular manual inspections, lacking online monitoring methods for the relative rotation of the screen frame. They are often only discovered after significant wear or contamination occurs, resulting in problems such as delayed response, high maintenance costs, long downtime, and difficulty in tracing the source of contamination. Utility Model Content

[0004] One objective of this invention is to provide a vibrating screen anti-rotation improvement device that can perform non-contact real-time monitoring and timely warning of the relative rotation of the screen frame without affecting the screening operation. At the same time, the structure of the vibrating screen anti-rotation improvement scheme takes into account both limiting and buffering, so as to improve the stability of equipment operation, reduce the risk of metal foreign objects, and extend the service life of the screen and seals.

[0005] To achieve the above objectives, the present invention provides a solution as follows: A vibrating screen anti-rotation improvement device includes a vibrating screen mechanism and an early warning mechanism. The vibrating screen mechanism includes multiple screen frames, multiple screen meshes, multiple retaining rings, multiple washers, and multiple reflective stickers. The multiple screen frames are stacked sequentially, the screen meshes are positioned between adjacent screen frames, and the screen meshes are used to filter powder. The washers are positioned at the connection points of adjacent screen frames. The retaining rings surround the outer circumference of the screen frames and are located at the connection points of adjacent screen frames. The reflective stickers are attached to the retaining rings. The early warning mechanism includes a column, multiple reflective photoelectric devices, multiple relays, an alarm light, and a power supply. The extension direction of the column is the same as the stacking direction of the multiple screen frames. The multiple reflective photoelectric devices are spaced apart on the column, each reflective photoelectric device corresponding to a reflective sticker. The power supply is electrically connected to the alarm light through relays, and the power supply is electrically connected to the reflective photoelectric devices through relays. The reflective photoelectric devices are electrically connected to the alarm light through relays.

[0006] Optionally, the first guide assembly includes a first guide motor, a first guide belt, a first guide base, and a first guide slide rail. The first guide motor is mounted on the frame, the first guide belt is connected to the output end of the first guide motor and is rotatably connected to the frame, the first guide slide rail is mounted on the frame, and the first guide base is connected to the first guide belt and is slidably connected to the first guide slide rail along a second direction. The press assembly includes a compaction cylinder, a connecting plate, and multiple support plates. The compaction cylinder is connected to the first guide base, the connecting plate is connected to the output end of the compaction cylinder, and the multiple support plates are connected to the connecting plate and spaced apart from each other. The compaction cylinder is used to drive the connecting plate to move along the first direction.

[0007] Optionally, the reflective photoelectric device is an NPN reflective photoelectric switch.

[0008] Optionally, the reflective photoelectric device is slidably connected to the column, and the reflective photoelectric device and the corresponding reflective sticker are at the same height; the column is provided with multiple positioning holes, and the reflective photoelectric device is inserted into one of the multiple positioning holes.

[0009] Optionally, the reflective sticker has a hemispherical arc-shaped structure, and the reflective sticker gathers light and reflects it to a reflective photoelectric device.

[0010] Optionally, the alarm light includes a green light and a red light, with the green light on when the clamp ring is not rotating and the red light on when the clamp ring is rotating.

[0011] Optionally, the contact area between the screen frame and the gasket is provided with multiple spaced grooves, and some of the gaskets are fitted into the grooves.

[0012] Optionally, in the stacking direction of the screen frames, one end of the screen frame is provided with a limiting groove, and the other end of the screen frame is provided with a limiting post, which is inserted into the limiting groove on the adjacent screen frame.

[0013] Optionally, the warning mechanism also includes multiple cylinders, with one cylinder on each screen frame. The cylinders are electrically connected to a power source, and the output end of the cylinder is connected to the adjacent screen frame.

[0014] The beneficial effects of this utility model are as follows: This embodiment addresses the technical problem that under prolonged vibration conditions, the screen frame of a vibrating screen is prone to relative rotation, leading to abnormal friction between the screen and metal parts and the generation of metal powder. By configuring retaining rings and washers at the connection points of adjacent screen frames, structural positioning and vibration damping are achieved. Furthermore, a real-time status monitoring mechanism is constructed using a warning link consisting of "reflective stickers + reflective photoelectric devices + relays + alarm lights": When the screen frame is not rotating, the photoelectric device continuously receives reflected signals, and the system remains in normal operation; once the screen frame experiences a slight relative angular displacement, the reflected signal is immediately lost and an alarm is triggered, thus reminding for maintenance or tightening before wear occurs, preventing abnormal contact between the screen and metal parts, reducing metal powder generation, protecting screen life, and reducing the risk of product contamination. Simultaneously, the one-to-one photoelectric detection corresponding to each layer can accurately locate the specific layer where rotation occurs, improving maintenance efficiency; non-contact detection does not affect the vibrating screen operation, enabling online monitoring without stopping the machine; relay isolation improves the reliability and anti-interference capability of the electrical system. In summary, the device, through the synergy of structural limiting and photoelectric early warning, can promptly detect and suppress screen frame rotation, significantly improving the operational stability and safety of the vibrating screen system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the anti-rotation improvement device for vibrating screens provided in this embodiment of the utility model;

[0017] Figure 2 This is a partially enlarged schematic diagram of the vibration screen anti-rotation improvement device provided in this embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the circuit structure of the early warning mechanism provided in this embodiment of the utility model;

[0019] Figure 4 This is a longitudinal cross-sectional schematic diagram of the vibrating screen anti-rotation improvement device provided in this embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the transverse cross section of the vibrating screen anti-rotation improvement device provided in this embodiment of the utility model.

[0021] Explanation of icon numbers:

[0022] 10 Vibrating screen mechanism, 11 Screen frame, 12 Screen mesh, 13 Binding ring, 14 Washer, 15 Reflective sticker

[0023] 16 Limiting slot, 17 Limiting post, 20 Early warning mechanism, 21 Column, 22 Reflective photoelectric device

[0024] 23 Relay, 24 Alarm light, 25 Power supply, 26 Cylinder. Detailed Implementation

[0025] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, clearly and comprehensively demonstrating the technical solution. It should be noted that the listed embodiments are only a part of this utility model, and not all possible implementations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Please see Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the structure of the anti-rotation improvement device for vibrating screens provided in this embodiment of the utility model. Figure 2 This is a partially enlarged schematic diagram of the anti-rotation improvement device for vibrating screens provided in this embodiment of the utility model. Figure 3 This is a schematic diagram of the circuit structure of the early warning mechanism provided in this embodiment of the utility model. Figure 4 This is a longitudinal cross-sectional schematic diagram of the vibrating screen anti-rotation improvement device provided in this embodiment of the utility model. Figure 5 This is a schematic diagram of the transverse cross section of the vibrating screen anti-rotation improvement device provided in this embodiment of the utility model.

[0027] The anti-rotation improvement device for vibrating screens in this embodiment includes two parts: a vibrating screen mechanism 10 and an early warning mechanism 20. The vibrating screen mechanism 10 is composed of multiple screen frames 11 stacked sequentially, with a screen mesh 12 placed between any two adjacent screen frames 11 to achieve step-by-step filtration of powder. To ensure the positioning and buffering between screen frames 11, washers 14 are placed at the connection points of adjacent screen frames 11, and binding rings 13 are placed on the outer periphery of the screen frames 11 at these connection points to achieve circumferential restraint and limitation of the screen frames 11. To achieve non-contact detection of the relative rotation state of the screen frames 11, reflective stickers 15 are attached to the outside of each binding ring 13, and the reflective stickers 15 are opposite to the reflective photoelectric device 22 in the early warning mechanism 20. The early warning mechanism 20 includes a column 21 arranged in the same direction as the stacking of the screen frames 11. Multiple reflective photoelectric devices 22 are fixed at intervals along the height direction on the column 21, with each reflective photoelectric device 22 corresponding to a reflective sticker 15 on a clamping ring 13. A power supply 25 is electrically connected to the reflective photoelectric devices 22 and an alarm light 24 via a corresponding relay 23. The output signal of the reflective photoelectric device 22 controls the alarm light 24 via the relay 23. When the screen frames 11 maintain their original relative angle, the reflective photoelectric device 22 is located on the reflection path of the reflective sticker 15 and can continuously receive reflected light signals. Once adjacent screen frames 11 rotate relative to each other, the sticker deviates from the effective receiving area of ​​the photoelectric device, the reflected light signal is interrupted, and the alarm light 24 is triggered by the relay 23 to warn the operator, thereby achieving online monitoring and alarm of the relative rotation state of the screen frames 11.

[0028] This embodiment addresses the technical problem of screen frames 11 easily rotating relative to each other under prolonged vibration conditions, leading to abnormal friction between the screen mesh 12 and metal parts, and the generation of metal powder. By configuring clamping rings 13 and washers 14 at the connection points of adjacent screen frames 11, structural positioning and vibration damping are achieved. A real-time status monitoring mechanism is constructed using a warning link consisting of reflective stickers 15, reflective photoelectric devices 22, relays 23, and alarm lights 24. When the screen frame 11 is not rotating, the photoelectric device continuously receives reflected signals, and the system remains in normal operation. Once the screen frame 11 experiences a slight relative angular displacement, the reflected signal is immediately lost, triggering an alarm. This alerts for maintenance or tightening before wear occurs, preventing abnormal contact between the screen mesh 12 and metal parts, reducing metal powder generation, protecting the lifespan of the screen mesh 12, and reducing the risk of product contamination. Simultaneously, the one-to-one photoelectric detection corresponding to each layer can accurately locate the specific layer where rotation occurs, improving maintenance efficiency. Non-contact detection does not affect the vibrating screen operation, enabling online monitoring without stopping the machine. The isolation provided by relays 23 improves the reliability and anti-interference capability of the electrical system. In summary, the device, through the synergy of structural limiting and photoelectric early warning, can promptly detect and suppress the rotation of the screen frame 11, significantly improving the operational stability and safety of the vibrating screen system.

[0029] Specifically, the power supply 25 includes L / and N / terminals for receiving voltage from an external power supply 25. A transformer T1 is connected to the L1 and N1 terminals to convert the voltage of the power supply 25 to the required AC voltage. Reflective photoelectric devices 22B1 and B2 are connected to different branches of the circuit to control the on / off state of the circuit. The coil of the relay 23KA10 is connected between terminals A1 and A2, and the relay 23 is configured to activate its normally open contact when the coil is energized. A green alarm light 24P1 is connected to one normally open contact of the relay 23KA10 to indicate the first state of the circuit. A red alarm light 24P2 is connected to the other normally open contact of the relay 23 to indicate the second state of the circuit. A buzzer P3 is connected to the contacts of the relay 23 to emit an audible signal when the relay 23 is activated. This circuit control system controls the relay 23 by pressing the reflective photoelectric device 22 to control the operating state of the alarm light 24 and the buzzer, providing the user with visual and auditory status feedback.

[0030] This embodiment provides a reflective optoelectronic device 22, which uses an NPN reflective photoelectric switch as the photoelectric detection unit. The NPN reflective photoelectric switch integrates a transmitter and a receiver within the same housing. The transmitter emits a modulated beam of light towards the surface of the target being detected. After diffuse or specular reflection by the target, the light is received by a photosensitive device (such as a photodiode or phototransistor) at the receiver, forming an electrical signal. An internal signal conditioning circuit amplifies, filters, and compares the received signal, outputting a digital switching quantity in the form of an NPN open collector (or a pull-down collector). When a target with a reflectivity reaching a set threshold is present in the detection area, the output switches from a high-impedance state to a low-level state; when the target leaves or reflection is insufficient, the output returns to a high-impedance state and requires external pull-up to a logic high level. To adapt to different installation environments, the sensitivity (threshold) can be adjusted via potentiometer or button, and the operating mode indicator (such as LED on / off display of on / off status) can be configured. At the wiring level, the output can be connected to a PLC digital input or a microcontroller GPIO, obtaining a stable high / low level criterion through a pull-up resistor to the system power supply. Optional debouncing delay can be added to suppress background noise and minor jitter. Due to its reflective structure, the transmitting and receiving optical paths share the same side, eliminating the need for through-beam devices on both sides of the tested channel. This results in a smaller installation space and relatively relaxed mechanical alignment requirements. Furthermore, the NPN output has good versatility, directly matching common NPN input interfaces or optocoupler isolation modules, facilitating system integration.

[0031] The aforementioned technical solution, by employing an NPN reflective photoelectric switch, addresses the limitations of traditional through-beam sensor layouts, such as installation constraints, alignment difficulties, and complex wiring. It provides an integrated detection method for simultaneous transmission and reception on the same side, structurally reducing installation surface and alignment requirements, significantly lowering assembly difficulty and time costs. Simultaneously, the NPN open-collector output, through a pull-down conduction method, is directly compatible with the NPN input ports of mainstream industrial controllers, resolving issues such as false triggering or the need for adapter circuits due to mismatched interface levels between different manufacturers, thus achieving plug-and-play electrical compatibility. Regarding signal reliability, the built-in amplification and comparison threshold adjustment of the reflective sensor head suppresses ambient light interference and filters weak scattering, enabling stable detection of targets with different materials, colors, and surface roughness, thereby improving detection accuracy and reducing false alarms. Furthermore, the output can achieve clear edges and predictable response times through pull-up and debouncing settings, ensuring stable operation even at high speeds. In summary, this solution achieves synergistic optimization in terms of installation convenience, interface universality, and anti-interference, effectively solving engineering pain points such as space constraints and interface compatibility, and achieving the technical effects of shortening the debugging cycle, improving testing stability, and enhancing system reliability.

[0032] This embodiment provides an adjustable reflective photoelectric detection structure. The reflective photoelectric device 22 is slidably connected along the vertical column 21. Preferably, the guide groove on the column 21 cooperates with the slider / sliding sleeve of the photoelectric device mounting base, allowing the photoelectric device to move smoothly and be positioned axially on the column 21. A reflective sticker 15 is pasted at the corresponding position on the surface to be detected. During installation and debugging, the transmitting / receiving optical axis of the reflective photoelectric device 22 is adjusted to be at the same height as the reflective sticker 15, thereby ensuring that the reflected light returns to the receiving end for stable triggering. To achieve rapid and repeatable positioning, multiple equidistant or non-equidistant positioning holes are provided on the column 21 along the height direction. The photoelectric device mounting base is provided with an elastic positioning pin or latch structure. When the device slides to the target height, the positioning pin is inserted into the corresponding positioning hole to complete the mechanical fixation. If necessary, fastening screws or springs can be used to enhance vibration resistance. With the above structural arrangement, the operator can select different positioning holes to achieve graded height settings according to the height of the workpiece, the level of the conveyor line, or the position of obstructions. At the same time, the one-to-one correspondence between the photoelectric device and the reflective sticker 15 at the same height ensures that the optical path is coaxial. This structure is compatible with common NPN / PNP reflective switches. The column 21 can be a profile or a bent steel plate. The diameter and spacing of the positioning holes can be designed according to standardized specifications, which facilitates mass production and maintenance replacement.

[0033] This technical solution addresses the challenges of traditional reflective photoelectric sensors, such as difficult alignment, non-repeatable installation height, and time-consuming on-site debugging, by employing a "sliding + positioning hole segmentation" mechanical adjustment method. It provides a rapid and repeatable height setting mechanism: the operator simply slides along the column 21 and inserts it into the corresponding positioning hole to quickly align the photoelectric sensor and reflective sticker 15 to the same height, avoiding false triggering and missed detections caused by optical axis deviation, thereby improving detection stability and consistency. The discrete height reference of multiple positioning holes eliminates the need for recalibration when changing workpiece specifications or adjusting production line cycle time, significantly shortening changeover time and reducing reliance on operator skills. The pin-type mechanical locking combined with the fastening auxiliary structure improves vibration and displacement resistance, solving the problem of position drift caused by vibration during operation and ensuring reliable detection under long-term operation. Overall, this solution achieves synergistic optimization in installation adjustability, alignment accuracy, and maintenance efficiency, resulting in rapid debugging, stable detection, and reduced operation and maintenance costs.

[0034] This embodiment provides a reflective sticker 15 structure for reflective photoelectric detection. The reflective sticker 15 has a hemispherical arc shape, and its surface is made of a high-reflectivity material or has a microstructured reflective layer. When a light beam emitted from the emitting end of the reflective photoelectric device 22 shines on the hemispherical arc-shaped reflective sticker 15, guided by the curved surface geometry, the incident light is locally focused and directional or quasi-directionally reflected by the normal distribution of the curved surface. This makes the energy of the reflected light more concentrated near the receiving window of the reflective photoelectric device 22, thereby forming a higher incident light intensity at the receiving end. Compared with planar or ordinary diffuse reflective stickers, the hemispherical arc-shaped structure can still provide effective reflection return within a larger incident angle range, reducing the angle sensitivity and alignment requirements during installation. In practice, the hemispherical arc-shaped reflective sticker 15 can be injection molded or molded, and a metallized mirror layer or a microprism-type reflective layer can be formed on its surface; its radius of curvature can be selected according to the divergence angle and installation distance of the photoelectric device to optimize the size and energy density of the returned light spot, thereby matching the receiving optical aperture and sensitivity threshold of the photoelectric device.

[0035] The above technical solution addresses the problems of insufficient reflected light intensity and susceptibility to vibration and angular deviations, leading to false alarms and missed detections, caused by traditional planar reflective stickers in environments with oblique incidence, long distances, or weak reflective materials. By employing a hemispherical arc-shaped reflective sticker 15, the solution achieves geometric focusing and enhanced reflection of incident light, significantly increasing the light intensity returning to the reflective optoelectronic device 22, thereby improving the signal-to-noise ratio and effective detection distance. Simultaneously, it increases the tolerance for the incident angle, reducing installation and alignment difficulties and minimizing detection instability caused by equipment vibration, workpiece height fluctuations, or slight swaying. Therefore, this solution achieves higher receiving margin and threshold redundancy at the same transmission power, enabling stable triggering and reducing false alarms. It also maintains reliable identification even in complex backgrounds or strong ambient light conditions, achieving the technical effects of increased installation tolerance, enhanced anti-interference capabilities, and extended maintenance cycles.

[0036] This embodiment provides a control scheme for an alarm light 24 used to indicate the operating status of a beaded ring 13. The alarm light 24 includes two indicator light sources: a green light and a red light, and is electrically connected to a reflective photoelectric device 22, the rotation status detection unit of the beaded ring 13. When the beaded ring 13 is detected to be in a stationary state, the reflective photoelectric device 22 drives the green light to illuminate; when the beaded ring 13 is detected to be rotating, the reflective photoelectric device 22 drives the red light to illuminate, thus enabling intuitive differentiation of the dynamic state of the beaded ring 13. To avoid misjudgment and flickering, rotation criteria, such as a speed threshold, minimum duration filtering, or de-jittering delay, can be set in the control logic; simultaneously, the green and red lights can be interlocked to ensure that only one color is illuminated at any given time, improving the clarity of status identification. The alarm light 24 can be installed in a prominent position on the equipment. The light body can be made of high-brightness LEDs and used with a diffuser to expand the viewing angle and adapt to different lighting environments. If necessary, it can be linked with an audible and visual buzzer to enhance the alarm.

[0037] The above technical solution addresses the technical problems of traditional equipment, such as difficulty in distinguishing the operating status of the cable ring 13, low efficiency of manual inspection, and high risk of misoperation. By clearly indicating the stationary and rotating states with green and red lights respectively, operators can quickly ascertain the status of the cable ring 13 even from a distance or in high-noise environments, reducing the time cost and safety risks of close-range confirmation. The introduction of rotation threshold and de-jitter logic avoids false alarms caused by minor vibrations or instantaneous start-stop, improving the stability and reliability of status indication; interlocking control ensures a single color display, preventing information confusion. Therefore, this solution achieves real-time, intuitive, and low-cost visual monitoring of the operating status of the cable ring 13, improving equipment safety and operation and maintenance efficiency, and reducing the rate of misoperation and downtime.

[0038] This embodiment provides an optimized anti-rotation structure for a screening device. Multiple circumferentially spaced grooves are provided on the contact surface between the screen frame 11 and the washer 14. During assembly, corresponding segments of the washer 14 are embedded into these grooves to form a partial interlocking fit, while the remaining segments maintain conventional surface contact. The grooves can be rectangular or have a circular bottom, with the groove depth matching the thickness of the washer 14, to provide additional radial and tangential anti-slip geometric constraints without significantly changing the axial clamping force. Through this composite contact form of "surface contact + partial embedding," the contact interface between the screen frame 11 and the washer 14 changes from pure friction constraint to a combined friction and geometric shear constraint, thereby improving anti-rotation capability. The number, spacing, and circumferential position of the grooves can be designed and optimized according to the dimensions of the screen frame 11, working amplitude, and torque load to reduce local stress concentration while ensuring assembly tolerances. The washer 14 can be made of a wear-resistant elastic material with appropriate hardness, enabling it to provide both sealing / buffering under axial preload and reliable engagement with the grooves.

[0039] The above technical solution addresses the problem that traditional flat contact interfaces rely solely on friction for anti-rotation, making the screen frame 11 prone to slight rotation or even loosening under vibration, impact, or off-center torque. By setting interval grooves at the contact points and embedding part of the gaskets 14, tangential mechanical locking and torque sharing of the screen frame 11 are achieved, significantly improving anti-rotation stability and reducing the risk of positioning misalignment and seal failure due to slippage. The interval arrangement disperses torque transmission across multiple embedding points, reducing single-point shear stress and wear, and extending the service life of the contact surface between the gaskets 14 and the screen frame 11. At the same time, partial surface contact is maintained to preserve necessary axial preload and vibration damping, avoiding noise and fatigue problems caused by excessive rigidity. Thus, this solution effectively suppresses the risk of screen frame 11 rotation at low cost without adding complex fasteners or additional anti-rotation structures, improving equipment operational reliability and maintenance cycle.

[0040] This embodiment provides an anti-rotation docking structure for screen frames 11 in a multi-layer screening device. In the stacking direction of the screen frames 11, a limiting groove 16 is provided at one end of each screen frame 11, and a corresponding limiting post 17 is provided at the opposite end. During assembly, the limiting post 17 of the upper layer screen frame 11 is inserted into the corresponding limiting groove 16 of the adjacent lower layer screen frame 11, forming a geometrically interlocking connection between layers. The fit between the limiting post 17 and the limiting groove 16 can be a transition fit or a clearance fit, preferably with a small radial gap to compensate for machining and thermal expansion tolerances, and pre-tightened axially using conventional clamping components. The limiting groove 16 can be rectangular or a dovetail structure with rounded corners, and the limiting post 17 can be columnar or a short pin with a guiding chamfer for quick alignment and insertion. Based on this "post-groove" bonding spatial positioning relationship, the screen frames 11 are not only guided in coaxiality but also form a positive mechanical limit in the tangential direction, significantly improving the alignment stability of each layer of screen frames 11. Single or multiple limiting posts 17-groove pairs can be set in the circumferential direction according to the size of the screen frame 11 and the working torque. Wear-resistant coatings or embedded bushings can be added to the contact surface to improve service life.

[0041] To address the technical problems of traditional multi-layer screen frames 11 relying solely on frictional clamping, which easily leads to relative rotation under vibration and eccentric torque, causing screen surface misalignment, seal failure, and material cross-layering, this solution introduces a locking column 17 and a locking groove 16 between adjacent screen frames 11, upgrading the anti-rotation constraint from "friction force" to a synergistic method of "friction + geometric locking." After the locking column 17 is inserted into the locking groove 16, it can directly bear and share the tangential torque, limiting the relative rotation of the screen frame 11 and reducing the risk of loosening. Simultaneously, the column-groove guidance improves assembly alignment, reducing vibration and noise caused by eccentricity. Multiple circumferential points can be arranged to disperse torque, reducing local stress and wear, and extending the service life of the screen frame 11 and seals. Axial tension is still maintained, ensuring that vibration damping and sealing performance are unaffected. Thus, under the premise of simple structure, low cost, and easy assembly and maintenance, the risk of screen frame 11 rotation is effectively suppressed, improving equipment operational stability and screening consistency.

[0042] This embodiment proposes a configuration scheme for an active reset early warning mechanism 20 for a multi-layer screening device. The early warning mechanism 20 includes multiple cylinders 26 disposed on each screen frame 11. Each screen frame 11 is provided with at least one cylinder 26. The cylinders 26 are electrically connected to the power supply 25 and the control unit via cables. Their output ends (piston rod ends) are mechanically connected to adjacent screen frames 11 via connecting rods, swing arms, or telescopic joints. Under normal conditions, the system uses a reflective photoelectric device 22 to detect the angular deviation of each screen frame 11 relative to a reference position in real time. When a rotational deviation of a screen frame 11 exceeding a set threshold is detected, the control unit sends a drive command to the cylinder 26 corresponding to that screen frame 11. The cylinder 26 extends or retracts under the control of compressed air or an electro-pneumatic valve, applying a tangential torque opposite to the direction of deflection to the screen frame 11, causing it to rotate in the opposite direction around the original connection center until it returns to the calibrated zero position or tolerance range. To improve responsiveness and adaptability, cylinder 26 can adopt an adjustable stroke and buffer structure. The output connection point is located circumferentially on the screen frame 11 to form an effective return arm. If necessary, multiple circumferentially distributed cylinders 26 can be set on one screen frame 11 to achieve torque distribution and synchronous reset. The electrical interface uses vibration-damping connectors and sheathed cables to adapt to working conditions. The control strategy can include soft start, force / position dual closed loop, and over-limit shutdown protection to ensure a smooth and reliable reset process.

[0043] To address the technical problem that multi-layer screen frames 11 are prone to relative rotation under the influence of vibration, uneven load, or uneven sealing resistance, and that relying solely on friction clamping is insufficient for timely correction, this solution addresses this issue by configuring an independent cylinder 26 in each screen frame 11 and establishing a mechanical closed loop with adjacent screen frames 11, thus linking early warning detection with active correction. When rotation of the screen frame 11 is detected, the cylinder 26 immediately outputs a reverse torque to reset the screen frame 11, upgrading the anti-rotation mechanism from "passive friction constraint" to a collaborative mechanism of "active drive correction + passive constraint." This eliminates accumulated angular difference in the early deflection stage, preventing screen surface misalignment, seal line damage, and material cross-layering. The multi-layer independent control of the cylinders 26 allows for rapid correction of individual layers as needed, reducing downtime intervention. Adjustable stroke and buffer design reduce impact and secondary vibration, extending the lifespan of connectors and seals. Electrically linked threshold control and protection logic enhance system safety and stability. Therefore, automatic reset of screen frame 11 deflection is achieved without stopping the machine or with short-term shutdowns, significantly improving screening accuracy, operational reliability, and maintenance efficiency.

[0044] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0045] Furthermore, when an element is referred to as 'fixed to' or 'set on' another element, it may be directly attached to that element, or there may be other intervening elements between them. When an element is referred to as 'connected to' another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0046] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, the designation of features such as "first" and "second" can either explicitly express or imply the presence of at least one such feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A device for improving the anti-rotation of a vibrating screen, characterized in that, The vibrating screen anti-rotation improvement device includes: A vibrating sieve mechanism includes multiple sieve frames, multiple sieve meshes, multiple retaining rings, multiple washers, and multiple reflective stickers. The sieve frames are stacked sequentially. The sieve meshes are positioned between adjacent sieve frames and are used to filter powder. The washers are positioned at the connection points of adjacent sieve frames. The retaining rings surround the outer circumference of the sieve frames and are located at the connection points of adjacent sieve frames. The reflective stickers are attached to the retaining rings. The warning mechanism includes a column, multiple reflective photoelectric devices, multiple relays, an alarm light, and a power supply. The extension direction of the column is the same as the stacking direction of the multiple screen frames. The multiple reflective photoelectric devices are spaced apart on the column, and each reflective photoelectric device corresponds to a reflective sticker. The power supply is electrically connected to the alarm light through the relays, and the power supply is electrically connected to the reflective photoelectric devices through the relays. The reflective photoelectric devices are electrically connected to the alarm light through the relays.

2. The anti-swinging improvement device for a vibrating screen according to claim 1, characterized by The reflective optoelectronic device is an NPN reflective photoelectric switch.

3. The anti-swinging improvement device for a vibrating screen according to claim 1, characterized by The reflective photoelectric device is slidably connected to the column, and the reflective photoelectric device and the corresponding reflective sticker are at the same height; The column is provided with multiple positioning holes, and the reflective photoelectric device is inserted into one of the multiple positioning holes.

4. The anti-swinging improvement device for a vibrating screen according to claim 3, characterized by The reflective sticker has a hemispherical arc-shaped structure, and the reflective sticker gathers light and reflects it to the reflective photoelectric device.

5. The vibrating screen anti-rotation improvement device according to claim 1, characterized in that, The alarm light includes a green light and a red light. The green light is on when the clamp ring is not rotating, and the red light is on when the clamp ring is rotating.

6. The anti-swinging improvement device for a vibrating screen according to claim 1, characterized by The contact area between the sieve frame and the gasket is provided with multiple spaced grooves, and part of the gasket is assembled in the grooves.

7. The anti-swinging improvement device for a vibrating screen according to claim 1, characterized by In the stacking direction of the screen frames, one end of the screen frame is provided with a limiting groove, and the other end of the screen frame is provided with a limiting post, which is inserted into the limiting groove on the adjacent screen frame.

8. The anti-swinging improvement device for a vibrating screen according to claim 1, characterized by The warning mechanism also includes multiple cylinders, with one cylinder on each of the screen frames. The cylinders are electrically connected to the power supply, and the output end of the cylinders is connected to the adjacent screen frames.

Images