Anti-blocking quartz sand sorting screen device

Abstract

The application discloses a quartz sand sorting screen device capable of preventing material blocking, relates to the technical field of quartz sand sorting, and comprises a screen box, a screen frame, a sorting screen body, a vibration exciter, a base frame and a PLC electric control system, further comprises a micro elastic self-vibrator, an auxiliary screen cleaning assembly, a pulse jet screen cleaning assembly, a material loosening assembly and a piezoelectric film sensor. During the vibration sorting process, the micro elastic self-vibrator is used to generate high-frequency micro-amplitude vibration for cleaning the screen hole, the piezoelectric film sensor is used to detect the degree of material blocking in real time, different strength of the anti-blocking strategy is automatically triggered according to the material blocking grade, the micro elastic self-vibrator is accurately applied to the screen hole to break the material bridge, the ultrasonic wave is used to assist in loosening the fine particle blocking, the pulse jet is used to reverse blow and clean the stubborn blocking, and the micro elastic self-vibrator, the ultrasonic wave screen cleaning and the pulse jet reverse blow are cooperated to form a multi-dimensional cooperative screen cleaning structure, so that the accurate detection and grading of the material blocking is realized.

Description

Technical Field

[0001] This invention relates to the field of quartz sand sorting technology, specifically to a quartz sand sorting screen device that prevents material blockage. Background Technology

[0002] Quartz sand, as an important industrial raw material, is widely used in glass manufacturing, casting, ceramics, refractory materials, and construction. Its particle size directly affects application performance and product quality; therefore, quartz sand sorting is a core step in quartz sand production. By precisely separating the mixture according to particle size, the particle size requirements of different industries can be met. Quartz sand sorting screens are specialized screening equipment for particle size classification and impurity separation of quartz sand. The mainstream types are linear vibrating screens and circular vibrating screens. Vibration causes the material to move on the screen mesh, achieving the separation of materials with different particle sizes.

[0003] In existing technologies, when quartz sand sorting and screening equipment is working, quartz sand particles are prone to getting stuck in the screen mesh, which reduces the effective screening area of ​​the screen, slows down the screening speed, reduces the powder screening efficiency, and increases the operating resistance of the equipment. Therefore, frequent shutdowns are required to manually clean the blockage in the screen, which not only disrupts the production rhythm, reduces the overall production efficiency, and increases the production cycle, but the cleaning process is also time-consuming and labor-intensive, resulting in a significant increase in manual maintenance costs in the long run.

[0004] Therefore, we propose a quartz sand sorting and screening device to prevent clogging, in order to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a quartz sand sorting and screening device that prevents material blockage, thereby solving the problem that the quartz sand sorting and screening equipment mentioned in the background art is prone to material blockage during operation, requiring frequent shutdowns for manual cleaning, which not only disrupts the production rhythm and reduces overall production efficiency, but also consumes time and effort and increases labor costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quartz sand sorting and screening device for preventing material blockage, comprising a screen box, a screen frame, a sorting screen body, a vibrator, a base frame, and a PLC electrical control system, and further comprising a micro elastic vibrator, an auxiliary screen cleaning assembly, a pulse jet screen cleaning assembly, a material unblocking assembly, and a piezoelectric thin film sensor; the micro elastic vibrator is installed at the intersection of the mesh wires of the sorting screen body, and autonomously generates high-frequency micro-amplitude secondary vibration when moving synchronously with the sorting screen body; the piezoelectric thin film sensor is located between the screen frame and the sorting screen body, and is used to detect the vibration frequency of the sorting screen body in real time; the piezoelectric thin film sensor, in conjunction with the PLC electrical control system, determines the degree of material blockage in the sorting screen body; the auxiliary screen cleaning assembly is installed at the corner of the top of the screen frame through a shock-absorbing structure, and emits high-frequency ultrasonic waves into the screen frame and the sorting screen body, which superimpose with the high-frequency vibration of the micro elastic vibrator; the pulse jet screen cleaning assembly is located at the bottom of the sorting screen body, and sprays instantaneous high-pressure airflow into the screen holes of the sorting screen body through a pulse jet device and a narrow air port.

[0007] Preferably, the material feeding assembly is evenly distributed laterally along the screen surface of the sorting screen body, and its height gradually decreases. It includes a flexible material feeding component fixed to the screen surface of the sorting screen body, a detachable wear-resistant material feeding component, and a locking component. The flexible material feeding component includes a flexible material feeding guide bar made of flexible wear-resistant material and fixed to the screen surface of the sorting screen body. A reinforcing component is fixedly connected inside the flexible material feeding guide bar, and multiple dovetail wedges are fixedly installed on the inner wall of the reinforcing component.

[0008] Preferably, the wear-resistant dredging component includes a wear-resistant dredging guide strip, the top of which is provided with multiple dovetail slots to engage with dovetail wedges, thereby achieving the clamping and fixing of the wear-resistant dredging guide strip and the flexible dredging component. The inner wall of the wear-resistant dredging guide strip is provided with multiple locking grooves.

[0009] Preferably, the locking component includes multiple ratchet barbs, which are respectively installed inside multiple locking grooves. Both outer surfaces of the multiple ratchet barbs are engaged with ratchet locking blocks to further lock the flexible material feeding component and the wear-resistant material feeding component, preventing loosening. Each pair of adjacent ratchet locking blocks forms a group. One outer surface of each group of ratchet locking blocks is fixedly installed with a fixing block. The top of each fixing block is provided with an arc-shaped groove. Multiple resistance rods are fixedly installed at the top of the outer surface of the reinforcing component.

[0010] Preferably, the outer surfaces of the plurality of resistance rods are movably fitted with arc-shaped limiting blocks, and one end of the arc-shaped limiting block is movably embedded in the interior of the arc-shaped slot to limit the fixing block and the ratchet locking block. The outer surface of the reinforcing component is provided with a plurality of movable holes, and the outer surface of the flexible material guide is provided with a plurality of movable cavities.

[0011] Preferably, the outer surfaces of the plurality of ratchet locking blocks are respectively movably embedded in the interior of the plurality of movable holes, the plurality of sets of ratchet locking blocks are respectively movably embedded in the interior of the plurality of locking grooves, and the plurality of resistance rods and arc-shaped limiting blocks are all located at the top surface inside the movable cavity.

[0012] Preferably, the micro elastic vibrator includes an embedded part made of polyurethane to adapt to the vibration deformation of the sorting screen body. Multiple annular anti-slip strips are fixedly connected to the outer surface of the embedded part to enhance its bonding force with the sorting screen body. A vibrating main body is fixedly installed on the top of the embedded part, and the vibrating main body is made of highly elastic polyurethane. When the sorting screen body vibrates, it generates high-frequency micro-amplitude secondary vibrations, precisely acting on the edge of the screen holes to shake off blockages. Multiple micro-protrusions are fixedly connected to the outer surface of the vibrating main body to enhance vibration transmission to the edge of the screen holes. A limiting part is fixedly installed at the bottom of the embedded part. A wear-resistant ring is fixedly installed on the outer surface of the top of the vibrating main body to improve its overall wear resistance. An installation groove is provided at the intersection of the mesh wires of the sorting screen body, and the micro elastic vibrator is fixedly installed inside the installation groove.

[0013] Preferably, the auxiliary screen cleaning assembly includes an ultrasonic generating system, ultrasonic transducers, and spring damping seats. The ultrasonic generating system is mounted on top of the PLC electrical control system via a bracket. Multiple ultrasonic transducers are provided and are respectively mounted at the four corners of the top of the screen frame via spring damping seats. The spring damping seats isolate the low-frequency, high-amplitude vibration of the screen frame. Protective covers are bolted to the four corners of the top of the screen frame to protect the ultrasonic transducers.

[0014] Preferably, the pulse jet cleaning assembly includes a reinforced base frame installed inside the screen frame and located below the sorting screen body. The reinforced base frame has a sealed air chamber inside and multiple micro-jet nozzles on its top, facing the sorting screen body, for spraying pulsed airflow into the screen holes. An air inlet pipe is fixedly connected to the outer surface of the reinforced base frame, and a pulse solenoid valve is provided at the input end of the air inlet pipe. The input end of the air inlet pipe is connected to the output end of the pulse jet device through an elastic fitting.

[0015] Preferably, the screen frame is installed inside the screen box, the sorting screen body is installed on the top surface inside the screen frame, two vibrators are provided and installed on the front surface of the screen box to drive the screen box and the sorting screen body to perform linear reciprocating vibration, multiple vibration spring seats are installed between the outer surface of the screen box and the base frame through a mounting bracket, a discharge device is fixedly installed on one side of the outer surface of the screen frame, and a hopper is fixedly installed at the bottom of the screen box.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When using this invention, during the vibratory screening process, the high-frequency micro-amplitude vibration generated autonomously by the micro-elastic self-vibrator cleans the mesh, and in conjunction with the piezoelectric film sensor, the degree of material blockage is detected in real time. Based on the level of blockage, different intensities of anti-blocking strategies are automatically triggered. The micro-elastic self-vibrator precisely acts on the mesh to break up material bridging; ultrasonic waves assist in clearing fine particle blockages; and pulse jet reverse blowing removes stubborn blockages. The combination of the micro-elastic self-vibrator, ultrasonic-assisted mesh cleaning, and pulse jet reverse blowing forms a multi-dimensional collaborative mesh cleaning structure, realizing accurate detection and graded clearing of blockages, and improving screening efficiency.

[0018] 2. When this invention is used, the flexible material feeding component combining inverted V-shape and inverted octagon shape realizes dynamic homogenization of materials, guides the quartz sand to be evenly distributed on the screen surface, eliminates material accumulation, maximizes the effective screening area of ​​the screen, and improves the sorting effect.

[0019] 3. When using this invention, the wave-shaped flexible material feeding components are symmetrically installed on both sides of the sorting screen body to form flexible baffles, which effectively prevents the quartz sand material from flowing to the edges of the sorting screen body and avoids material segregation and accumulation on the screen edge.

[0020] 4. When using this invention, the feeding assembly is detachable. The flexible feeding component deforms with the vibration of the screen, and the wear-resistant feeding component directly bears the impact and friction of the material, which improves the service life of the feeding assembly. The detachable wear-resistant feeding conductor is easy to replace individually, reducing the later maintenance cost. Attached Figure Description

[0021] Figure 1 This is a first-angle schematic diagram of a quartz sand sorting and screening device for anti-clogging materials according to the present invention.

[0022] Figure 2 This is a second-angle schematic diagram of a quartz sand sorting and screening device for anti-clogging material according to the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the screen box in a quartz sand sorting and screening device for anti-clogging materials according to the present invention;

[0024] Figure 4 This is a schematic diagram showing the structure of the auxiliary screen cleaning component in a quartz sand sorting and screening device for preventing clogging materials according to the present invention.

[0025] Figure 5 This is a schematic diagram of the pulse jet cleaning assembly in a quartz sand sorting and screening device for anti-clogging materials according to the present invention.

[0026] Figure 6 This is a cross-sectional schematic diagram of the reinforced base frame in a quartz sand sorting and screening device for anti-clogging materials according to the present invention;

[0027] Figure 7This is a schematic diagram of the material slurry component in a quartz sand sorting and screening device for preventing clogging, according to the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the miniature elastic self-vibrator in the quartz sand sorting and screening device for anti-clogging material according to the present invention;

[0029] Figure 9 This is a schematic diagram showing the structure of the flexible material-discharging component in a quartz sand sorting and screening device for preventing clogging according to the present invention.

[0030] Figure 10 This is a partial cross-sectional schematic diagram of the wear-resistant material-draining component in a quartz sand sorting and screening device for preventing clogging, according to the present invention.

[0031] Figure 11 This is a schematic diagram showing the structure of the locking component in a quartz sand sorting and screening device for preventing clogging materials according to the present invention.

[0032] Figure 12 This is a schematic diagram of two different shaped material-draining components in a quartz sand sorting and screening device for preventing clogging, according to the present invention.

[0033] In the picture:

[0034] 1. Screen box; 2. Screen frame; 3. Sorting screen body; 31. Mounting groove; 32. Miniature elastic vibrator; 321. Embedded part; 322. Vibrating main body; 323. Limiting part; 324. Micro-protrusion; 325. Annular anti-slip strip; 326. Wear-resistant ring; 4. Auxiliary screen cleaning assembly; 41. Protective cover; 42. Spring shock absorber seat; 43. Ultrasonic transducer; 5. Pulse jet screen cleaning assembly; 501. Reinforced base frame; 502. Sealed air chamber; 503. Micro-jet nozzle; 504. Air inlet pipe; 505. Pulse solenoid valve; 6. Material unloading assembly; 61. Flexible material unloading component; 611. Flexible material unloading 612. Guide bar; 613. Reinforcing component; 614. Dovetail wedge; 615. Movable hole; 616. Movable cavity; 62. Wear-resistant material unloading component; 621. Wear-resistant material unloading guide bar; 622. Dovetail groove; 623. Locking groove; 63. Locking component; 631. Ratchet barb block; 632. Ratchet locking block; 633. Fixing block; 634. Arc-shaped groove; 635. Arc-shaped limit block; 636. Resistance rod; 7. Vibrator; 8. Base frame; 9. Vibration spring seat; 10. PLC electrical control system; 11. Ultrasonic generating system; 12. Discharge device; 13. Hopper; 14. Piezoelectric film sensor. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1-12As shown, the present invention provides a technical solution: a quartz sand sorting and screening device for preventing material blockage, comprising a screen box 1, a screen frame 2, a sorting screen body 3, a vibrator 7, a base frame 8, and a PLC electrical control system 10, and further comprising a micro elastic vibrator 32, an auxiliary screen cleaning assembly 4, a pulse jet screen cleaning assembly 5, a material unblocking assembly 6, and a piezoelectric thin film sensor 14; the micro elastic vibrator 32 is installed at the intersection of the mesh wires of the sorting screen body 3, and autonomously generates high-frequency micro-amplitude secondary vibration when moving synchronously with the sorting screen body 3, for shaking off particles stuck in the screen holes; the piezoelectric thin film sensor 14 is located between the screen frame 2 and the sorting screen body 3, for real-time detection. The vibration frequency of the sorting screen body 3 is determined by the piezoelectric film sensor 14 in conjunction with the PLC electronic control system 10, which judges the degree of material blockage in the sorting screen body 3 and achieves accurate identification of the material blockage status of the sorting screen body 3. The auxiliary screen cleaning component 4 is installed at the corner of the top of the screen frame 2 through a shock-absorbing structure. It emits high-frequency ultrasonic waves into the screen frame 2 and the sorting screen body 3, which are superimposed with the high-frequency vibration of the micro elastic self-vibrator 32 to help clear the fine particles blocking the screen holes. The pulse jet screen cleaning component 5 is located at the bottom of the sorting screen body 3. It sprays instantaneous high-pressure airflow into the screen holes of the sorting screen body 3 through a pulse jet device and a narrow air port to achieve back-blowing and cleaning. The miniature elastic vibrator 32 includes an embedded part 321 made of polyurethane, which is adapted to the vibration deformation of the sorting screen body 3. Multiple annular anti-slip strips 325 are fixedly connected to the outer surface of the embedded part 321 to enhance the bonding force with the sorting screen body 3. A vibrating body part 322 is fixedly installed on the top of the embedded part 321. The vibrating body part 322 is made of highly elastic polyurethane and generates high-frequency micro-amplitude secondary vibration when the sorting screen body 3 vibrates, which accurately acts on the edge of the screen hole and shakes off the blockage material in the screen hole. Multiple micro-protrusions 324 are fixedly connected to the outer surface of the vibrating body part 322 to enhance the vibration transmission to the edge of the screen hole. A limiting part 323 is fixedly installed at the bottom of the embedded part 321. A wear-resistant ring 326 is fixedly installed on the outer surface of the top of the vibrating body part 322 to improve the overall wear resistance of the vibrating body part 322. An installation groove 31 is opened at the intersection of the mesh wires of the sorting screen body 3, and the miniature elastic vibrator 32 is fixedly installed inside the installation groove 31. The auxiliary screen cleaning component 4 includes an ultrasonic generating system 11, ultrasonic transducers 43, and spring damping seats 42. The ultrasonic generating system 11 is mounted on the top of the PLC electrical control system 10 via a bracket. Multiple ultrasonic transducers 43 are provided and are respectively mounted at the four corners of the top of the screen frame 2 via spring damping seats 42. The spring damping seats 42 are used to isolate the low-frequency large-amplitude vibration of the screen frame 2. Protective covers 41 are bolted to the four corners of the top of the screen frame 2 to protect the ultrasonic transducers 43.The pulse jet cleaning assembly 5 includes a reinforced base frame 501, installed inside the screen frame 2 and located below the sorting screen body 3. A sealed air chamber 502 is provided inside the reinforced base frame 501, and multiple micro-jet nozzles 503 are provided on the top of the reinforced base frame 501, facing the sorting screen body 3, for injecting pulsed airflow into the screen holes. An air inlet pipe 504 is fixedly connected to the outer surface of the reinforced base frame 501, and a pulse solenoid valve 505 is provided at the input end of the air inlet pipe 504, its input end being connected to the output end of the pulse jet equipment via an elastic fitting. The screen frame 2 is installed inside the screen box 1, and the sorting screen body 3 is installed on the top surface inside the screen frame 2. Two vibrators 7 are provided, installed on the front surface of the screen box 1, for driving the screen box 1 and the sorting screen body 3 to perform linear reciprocating vibration. Multiple vibration spring seats 9 are installed between the outer surface of the screen box 1 and the base frame 8 via a mounting bracket. A discharge device 12 is fixedly installed on one side of the outer surface of the screen frame 2, and a hopper 13 is fixedly installed at the bottom of the screen box 1.

[0037] In this embodiment, during use, the screen box 1 is tilted at 15°-20° to ensure thorough screening, and the hopper 13 is tilted at 45°-60°. Under gravity, the material slides quickly down the inner wall of the hopper, preventing accumulation and facilitating rapid discharge. The pulse solenoid valve 505 is a Baode 6213 type, known for its good sealing performance and suitability for long-term, high-frequency on / off cycles. The input end of the pulse solenoid valve 505 is connected to an external pulse jet device via an elastic fitting. The pulse jet device includes an air compressor, air filter, and dryer. The air compressor provides compressed air, and the air filter and dryer remove oil and moisture from the compressed air, protecting the pulse solenoid valve 505 and the air path. Inside the screen box 1, two sorting screen bodies 3 are installed, corresponding to a miniature elastic self-vibrating element 32, a piezoelectric film sensor 14, an auxiliary screen cleaning assembly 4, and a pulse jet screen cleaning assembly 5. Figure 3As shown, quartz sand is fed through the feed hopper onto the screen of the upper sorting screen body 3. The vibrator 7 (model ZDJ-10) drives the screen box 1 and the sorting screen body 3 to perform linear reciprocating vibration, screening the quartz sand. Quartz sand particles smaller than the screen holes fall onto the lower sorting screen body 3 for secondary screening, while quartz sand particles larger than the screen holes move along the screen surface and are discharged through the discharge device 12. During the vibration of the sorting screen body 3, the micro elastic vibrator 32 moves along with it, generating high-frequency micro-amplitude secondary vibration. This secondary vibration acts precisely on the screen holes. When small particles are stuck in the screen holes or fine powder adheres to the surface of the screen holes, the high-frequency micro-amplitude vibration can quickly shake off the stuck particles and disperse the adhered fine powder, reducing screen clogging. The piezoelectric thin film sensor 14 is model LDT0-028K, and the PLC control system 10 is model Mitsubishi FX3U-48MT / ES-A. All electrical components are connected to the PLC control system 10 for communication, enabling automatic start / stop and power regulation. The piezoelectric thin film sensor 14 detects the vibration parameters of the sorting screen body 3 in real time. When the screen holes become clogged, the accumulation of material will cause the local vibration frequency and amplitude of the screen to decrease. The piezoelectric thin film sensor 14 transmits the abnormal signal to the PLC control system 10. The PLC control system 10 analyzes the signal to determine the degree of clogging: when the detected vibration frequency is 15-17Hz, the amplitude decreases synchronously by 10%-25%, and the abnormal parameters last for more than or equal to 3s, it is determined to be a mild clogging; when the detected vibration frequency is 12-15Hz, the amplitude decreases synchronously by 25%-50%, and the abnormal parameters last for more than or equal to 2s, it is determined to be a moderate clogging; when the vibration frequency of the sorting screen body 3 is less than 12Hz, the amplitude decreases synchronously by more than 50%, or the amplitude has almost no fluctuation, and the abnormal parameters last for more than or equal to 1s, it is determined to be a severe clogging.

[0038] When there is slight material blockage and the timing time is greater than or equal to 3 seconds, the PLC control system 10 slightly increases the frequency of the vibrator 7 to 16.5-30Hz (without exceeding the anti-vibration design threshold of the screen box 1 and the vibration spring seat 9, so as to avoid fatigue and loosening of components such as the sorting screen body 3), thereby increasing the overall vibration of the sorting screen body 3. Under stronger excitation, the micro elastic self-vibrator 32 can synchronously increase the frequency of the secondary vibration generated by itself by 15%-25%, which is precisely applied to the edge of the screen hole, shaking off most of the stuck particles and adhering fine powder. It will not cause excessive scattering of quartz sand material due to excessive vibration, nor will it change the flow speed of the material on the screen surface. There is no need to start an additional mechanism; the screen can be restored to transparency by relying on the micro elastic self-vibrator 32.

[0039] When the material is moderately blocked and the duration is greater than or equal to 2 seconds, the PLC control system 10 triggers the auxiliary screen cleaning component 4 to operate. The ultrasonic generator system 11 is a JCC-2000W model with a generator power of 2000W and a frequency that is continuously adjustable from 20 to 40kHz. The ultrasonic transducer 43 is a JCS-35P model. The ultrasonic generator system 11 and the ultrasonic transducer 43 work together to generate a high-frequency micro-amplitude vibration of 30-35kHz, which is transmitted through the screen frame 2 to the entire sorting screen body 3. This vibration is superimposed with the local high-frequency vibration of the micro elastic self-vibrator 32, generating a stronger micro-explosion effect. This breaks up deep blockages and adhered fine powder clumps without causing resonance with the screen body and damaging the components. The ultrasonic cleaning and the micro elastic self-vibrator 32 form a synergistic screen cleaning process. The duration of a single ultrasonic operation is 8-10 seconds, with an interval of 3-5 seconds. The basic cycle is 2-3 times. After completion, if the vibration parameters are detected to return to normal, the ultrasonic cleaning operation is directly stopped, and subsequent cycles are terminated. If the blockage is not relieved (the vibration parameters are still in the moderate blockage range), the PLC control system 10 triggers a deep blockage removal operation, entering a coordinated blockage removal mode of ultrasonic and pulse jet cleaning. When the piezoelectric film sensor 14 detects that the screen vibration frequency and amplitude have returned to more than 90% of the normal working reference value and the stable time is greater than or equal to 3 seconds, the PLC control system 10 immediately shuts down the ultrasonic generator system 11 and the ultrasonic transducer 43, ending the screen cleaning.

[0040] When the screen is severely clogged and the duration is greater than or equal to 1 second, the PLC control system 10 triggers the auxiliary screen cleaning component 4 and the pulse jet screen cleaning component 5 to operate. The ultrasonic generation system 11 and the ultrasonic transducer 43 start first, releasing high-frequency ultrasonic waves of 30-35kHz 0.5 seconds in advance to initially loosen the stubborn clogged material layer in the screen holes. 0.5 seconds after the ultrasonic wave starts, the PLC control system 10 simultaneously opens the pulse solenoid valve 505. The compressed air from the pulse jet device, after being filtered and dried, enters the sealed air chamber 502 through the air inlet pipe 504 and sprays instantaneous high-pressure pulsed airflow into the screen holes through the micro-jet nozzle 503, blowing the stubborn clogged material in the screen holes out in the opposite direction. This complements the ultrasonic screen cleaning and the micro elastic self-vibrating element 32 screen cleaning, performing powerful cleaning and achieving precise screen cleaning. The ultrasonic waves and pulse jets operate in a basic cycle with a single coordinated operation duration of 3-4 seconds and a single intermittent interval of 1-2 seconds. Within a single cycle, the ultrasonic waves maintain a constant frequency of 30-35 kHz, while the pulse jets maintain a high-frequency pulse purging duration of 0.1-0.3 seconds of jetting and 1-2 seconds of interval. During the intermittent period, the ultrasonic waves and pulse jets are suspended, while the exciter 7 maintains its frequency increase and the micro elastic self-oscillator 32 continues to vibrate. The maximum number of cycles for ultrasonic and pulse jet cleaning is 4-5. If, after the initial number of cycles, the piezoelectric film sensor 14 detects that the screen vibration frequency and amplitude have recovered to more than 90% of the normal operating baseline value and remain stable for at least 5 seconds, the PLC control system 10 immediately and synchronously shuts down the auxiliary screen cleaning component 4 and the pulse solenoid valve 505, and restores the vibrator 7 to its normal frequency, ending the coordinated cleaning process. If the screen parameters are still detected as being in the severely clogged range, the PLC control system 10 will increase the pulse jet pressure (by 0.1-0.2 MPa) and continue cleaning for 2 more cycles. If the problem persists, an audible and visual alarm will be triggered, prompting manual intervention. From the start of pulse jet cleaning, ultrasonic and pulse jet cleaning operate synchronously with intermittent pauses until the clog is cleared or the protection mechanism is triggered, without any separate shutdown in between. Throughout the unblocking process, a graded cleaning method is adopted. Based on the level of blockage, different intensities of anti-blocking strategies are automatically triggered, forming a closed-loop control of perception, decision-making, and execution. The micro-elastic self-oscillator 32, ultrasonic cleaning, and pulse jet reverse blowing form a multi-dimensional collaborative cleaning structure, achieving accurate detection and graded unblocking. This solves the problem that when quartz sand sorting and screening equipment is in operation, the screen is prone to blockage, requiring frequent shutdowns for manual cleaning. This not only disrupts the production rhythm and reduces overall production efficiency, but the cleaning process is also time-consuming, labor-intensive, and increases labor costs.

[0041] Furthermore, the piezoelectric film sensor 14 between each sorting screen body 3 and the corresponding screen frame 2 can be installed in a multi-point distributed manner (two sensors are installed on each of the four sides where the sorting screen body 3 contacts the screen frame 2) to detect the vibration parameters of different areas, thereby improving the accuracy of material blockage detection, efficiently triggering the corresponding unblocking action, and improving the unblocking efficiency.

[0042] Example 2: Figure 4 , Figure 7 and Figures 9-12 As shown, the material feeding assembly 6 is evenly distributed laterally along the screen surface of the sorting screen body 3, with its height gradually decreasing. It includes a flexible material feeding component 61 fixed to the screen surface of the sorting screen body 3, a detachable wear-resistant material feeding component 62, and a locking component 63. The flexible material feeding component 61 includes a flexible material feeding guide 611 made of flexible wear-resistant material, fixed to the screen surface of the sorting screen body 3. A reinforcing component 612 is fixedly connected inside the flexible material feeding guide 611, and multiple dovetail wedges 613 are fixedly installed on the inner wall of the reinforcing component 612. The wear-resistant material feeding component 62 includes a wear-resistant material feeding guide 621. Multiple dovetail slots 622 are opened on the top of the wear-resistant material feeding guide 621, which engage with the dovetail wedges 613 to achieve a tight fixation between the wear-resistant material feeding guide 621 and the flexible material feeding component 61. Multiple locking grooves 623 are opened on the inner wall of the wear-resistant material feeding guide 621. The locking component 63 includes multiple ratchet barbs 631, which are installed inside multiple locking grooves 623. Both outer surfaces of the multiple ratchet barbs 631 are engaged with ratchet locking blocks 632 to further lock the flexible material feeding component 61 and the wear-resistant material feeding component 62 and prevent loosening. Each pair of adjacent ratchet locking blocks 632 forms a group. A fixing block 633 is fixedly installed on one outer surface of each group of ratchet locking blocks 632. The top of each fixing block 633 is provided with an arc-shaped slot 634. Multiple resistance rods 636 are fixedly installed at the top of the outer surface of the reinforcing component 612. Multiple resistance rods 636 have arc-shaped limiting blocks 635 movably fitted on their outer surfaces, with one end of each arc-shaped limiting block 635 movably embedded inside an arc-shaped slot 634 to limit the movement of the fixing block 633 and the ratchet locking block 632. Multiple movable holes 614 are formed on the outer surface of the reinforcing component 612, and multiple movable cavities 615 are formed on the outer surface of the flexible material guide bar 611. Multiple ratchet locking blocks 632 are movably embedded inside multiple movable holes 614, and multiple sets of ratchet locking blocks 632 are movably embedded inside multiple locking grooves 623. Multiple resistance rods 636 and arc-shaped limiting blocks 635 are all located on the top surface inside the movable cavities 615.

[0043] In this embodiment, one form of the feed distribution component 6 is a feed distribution element composed of inverted V-shapes and inverted octagonal shapes. Multiple sets of feed distribution elements are evenly distributed laterally along the screen surface, such as... Figure 4 and Figure 12As shown in Figure a, the wear-resistant material feeding component 62 faces the direction of quartz sand material flow. After the sorting screen body 3 is fed, it first contacts the arc-shaped top of the inverted V-shaped material feeding component, diverting the concentrated material to both sides to avoid excessive material thickness in the middle area. Then, the inverted octagonal material feeding component gathers the material on both sides towards the middle to prevent excessive diffusion of the material to both sides, forming a uniform material layer that is thick in the middle and thin on both sides. The two alternately combine to achieve dynamic homogenization of diversion, gathering, re-diversion, and re-gathering, which is conducive to the formation of a thin and uniform distribution of material on the screen surface, breaking the material flow inertia of traditional straight guide bars, eliminating material accumulation, maximizing the effective screening area of ​​the screen, and greatly improving the sorting effect.

[0044] Furthermore, the flexible material feeding component 61 forms the base, increasing the overall elasticity of the material feeding assembly 6. It can follow the vibration and deformation of the sorting screen body 3 without affecting the material feeding effect. The wear-resistant material feeding component 62 faces the material flow direction and can directly withstand the impact and friction of the material, reducing the wear of the flexible material feeding component 61 and improving the service life of the material feeding assembly 6.

[0045] Furthermore, by using a tool to move the other side of the arc-shaped limiting block 635, it is forced to rotate around the resistance rod 636, causing the other side of the arc-shaped limiting block 635 to rotate out of the arc-shaped slot 634. At this time, the fixing block 633 loses its limiting position. Then, the fixing block 633 is pulled out, and the ratchet locking block 632 is pulled out laterally, and then pulled out from the locking groove 623, the movable hole 614 and the movable cavity 615 in sequence, and then separated from the ratchet barb block 631. Finally, the wear-resistant slugging guide 621 is pulled upward, so that the dovetail slot 622 is separated from the dovetail wedge block 613, and the wear-resistant slugging component 62 can be disassembled for easy replacement of a new wear-resistant slugging component 62. With the detachable slugging component 6, only the wear-resistant slugging guide 621 needs to be replaced after wear, without the need to replace the entire guide, which greatly reduces the later maintenance cost.

[0046] Furthermore, align the dovetail groove 622 with the dovetail wedge 613 and press down on the wear-resistant material-draining component 62, causing the dovetail wedge 613 to engage in the dovetail groove 622, completing the installation of the wear-resistant material-draining component 62 and the flexible material-draining component 61. At this point, the wear-resistant material-draining component 62 wraps around the outer surface of the flexible material-draining component 61. Next, insert the ratchet locking block 632 into the movable hole 614, into the locking groove 623, and then engage with the side ratchet of the ratchet barb block 631. Finally, move the arc-shaped limiting block 635 so that one end rotates into the arc-shaped groove 634 for further locking, improving the tightness of the connection between the flexible material-draining component 61 and the wear-resistant material-draining component 62, and preventing the wear-resistant material-draining component 62 from loosening and falling off during subsequent vibrating screening.

[0047] Example 3: Figure 12 As shown, this is another form of the material unloading component 6, a wave-shaped material unloading component.

[0048] This embodiment uses a wavy, loose material assembly 6, such as... Figure 12 As shown in Figure b, the components are symmetrically installed along the transverse direction of the screen surface on both sides of the sorting screen body 3, with their height decreasing along the material flow direction. They also consist of a flexible material feeding component 61, a wear-resistant material feeding component 62, and a locking component 63, all arranged in a wave-like pattern. The wear-resistant material feeding component 62 is in contact with the quartz sand material. The wave-like profile forms a flexible retaining edge during vibration, effectively preventing the quartz sand material from flowing to the sides of the sorting screen body 3, avoiding material segregation and accumulation on the screen edges, and ensuring the utilization rate of the screen surface.

[0049] The overall effect and working principle of the mechanism are as follows: the vibrator 7 drives the screen box 1 and the sorting screen body 3 to perform linear reciprocating vibration, which performs multi-stage screening of the quartz sand material. Quartz sand of different particle sizes is discharged through the corresponding discharge device 12. During the sorting, the micro elastic self-vibrator 32 follows the movement of the sorting screen body 3, generating high-frequency micro-amplitude secondary vibration, which quickly shakes off the stuck particles. The piezoelectric thin film sensor 14 detects the vibration parameters of the sorting screen body 3 in real time. The PLC control system 10 analyzes and judges the degree of blockage based on the received signals. When there is slight blockage, the PLC control system 10 slightly increases the frequency of the vibrator 7. Under stronger excitation, the micro elastic self-oscillator 32 generates higher frequency secondary vibration, shaking off the particles in the screen holes. When there is moderate blockage, the PLC control system 10 triggers the auxiliary screen cleaning component 4 to operate. The ultrasonic transducer 43 generates high-frequency micro-amplitude vibration, which works in conjunction with the micro elastic self-oscillator 32 to clean the screen. When there is severe blockage, the pulse solenoid valve 505 opens while the ultrasonic screen is being cleaned. The compressed gas in the sealed air chamber 502 is instantly ejected through the micro-jet nozzle 503, blowing out the stubborn blockage in the screen holes in the opposite direction for powerful cleaning. After the cleaning is completed, the piezoelectric thin film sensor 14 detects that the vibration parameters of the sorting screen body 3 have returned to normal, and the PLC control system 10 controls the auxiliary screen cleaning component 4 and the pulse jet screen cleaning component 5 to stop operating. After the sorting screen body 3 is fed, the arc-shaped top of the inverted V-shaped material feeder first diverts the concentrated material to both sides. Then, the inverted octagonal material feeder gathers the material from both sides towards the center. The two work alternately to achieve dynamic homogenization through diversion, gathering, re-diversion, and re-gathering, forming a thin, uniformly distributed layer. Alternatively, a wave-shaped material feeder assembly 6 can be selected, symmetrically installed on both sides of the sorting screen body 3. The wave-shaped profile effectively prevents quartz sand material from flowing to the sides of the sorting screen body 3, avoiding material segregation and accumulation on the screen edge. The locking component 63 secures and locks the wear-resistant material feeder assembly 62, and facilitates the disassembly and installation of new wear-resistant material feeder guides 621.

[0050] Among them, the ultrasonic transducer 43, the pulse solenoid valve 505, the vibrator 7, the PLC electrical control system 10, the ultrasonic generation system 11 and the piezoelectric thin film sensor 14 are all existing technologies, and their components and operating principles are all publicly available technologies, so they will not be explained in detail here.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quartz sand sorting and screening device for preventing clogging, comprising a screen box (1), a screen frame (2), a sorting screen body (3), a vibrator (7), a base frame (8), and a PLC electrical control system (10), characterized in that: It also includes a micro elastic self-oscillator (32), an auxiliary screen cleaning assembly (4), a pulse jet screen cleaning assembly (5), a material unloading assembly (6), and a piezoelectric thin film sensor (14). The micro elastic self-oscillator (32) is installed at the intersection of the wire mesh of the sorting screen body (3), and generates high-frequency micro-amplitude secondary vibration autonomously when it moves synchronously with the sorting screen body (3); The piezoelectric thin film sensor (14) is located between the screen frame (2) and the sorting screen body (3) and is used to detect the vibration frequency of the sorting screen body (3) in real time. The piezoelectric thin film sensor (14) works with the PLC electronic control system (10) to determine the degree of material blockage in the sorting screen body (3). The auxiliary screen cleaning component (4) is installed at the corner of the top of the screen frame (2) through a shock-absorbing structure. It emits high-frequency ultrasonic waves to the screen frame (2) and the sorting screen body (3), which are superimposed with the high-frequency vibration of the micro elastic self-vibrator (32). The pulse jet cleaning assembly (5) is located at the bottom of the sorting screen body (3), and sprays instantaneous high-pressure airflow into the screen holes of the sorting screen body (3) through the pulse jet device and narrow air port; The material feeding assembly (6) is evenly distributed laterally along the screen surface of the sorting screen body (3), and its height gradually decreases. It includes a flexible material feeding component (61) fixed to the screen surface of the sorting screen body (3), a detachable wear-resistant material feeding component (62), and a locking component (63). The micro elastic self-vibrator (32) includes an embedded part (321) made of polyurethane material, which is adapted to the vibration deformation of the sorting screen body (3). Multiple annular anti-slip strips (325) are fixedly connected to the outer surface of the embedded part (321) to enhance the bonding force with the sorting screen body (3). A vibration body (322) is fixedly installed on the top of the embedded part (321), and the vibration body (322) is made of high elastic polyurethane material. When the sorting screen body (3) vibrates, it generates high frequency micro-amplitude secondary vibration, which is precisely applied to the edge of the screen hole to shake off the blockage material in the screen hole. Multiple micro protrusions (324) are fixedly connected to the outer surface of the vibration body (322) to enhance the vibration transmission to the edge of the screen hole. The piezoelectric thin film sensor (14) detects the vibration parameters of the sorting screen body (3) in real time. The PLC control system (10) determines the degree of blockage through signal analysis: when the detected vibration frequency is 15-17Hz, the amplitude decreases synchronously by 10%-25%, and the abnormal parameters persist for more than or equal to 3s, it is determined to be a mild blockage; when the detected vibration frequency is 12-15Hz, the amplitude decreases synchronously by 25%-50%, and the abnormal parameters persist for more than or equal to 2s, it is determined to be a moderate blockage; when the vibration frequency of the sorting screen body (3) is less than 12Hz, the amplitude decreases synchronously by more than 50%, and the abnormal parameters persist for more than or equal to 1s, it is determined to be a severe blockage. When there is slight material blockage, the PLC control system (10) slightly increases the frequency of the vibrator (7), and the secondary vibration frequency of the micro elastic self-oscillator (32) increases by 15%-25% under stronger excitation; When the material is in a moderate blockage, the PLC control system (10) triggers the auxiliary screen cleaning component (4) to generate a high-frequency micro-amplitude vibration of 30-35kHz, which is superimposed with the high-frequency vibration of the micro elastic self-oscillator (32) to clean the screen. When the material is severely blocked, the PLC control system (10) triggers the auxiliary screen cleaning component (4) and the pulse jet screen cleaning component (5) to operate. The ultrasonic waves initially loosen the stubborn blockage. After the ultrasonic waves start for 0.5 seconds, they spray instantaneous high-pressure pulse airflow into the screen holes through the micro jet nozzle (503) to blow the stubborn blockage out in the opposite direction.

2. The quartz sand sorting and screening device for anti-clogging material according to claim 1, characterized in that: The flexible material feeding component (61) includes a flexible material feeding guide (611), which is made of flexible wear-resistant material and is fixed on the screen surface of the sorting screen body (3). A reinforcing component (612) is fixedly connected inside the flexible material feeding guide (611), and multiple dovetail wedges (613) are fixedly installed on the inner wall of the reinforcing component (612).

3. The quartz sand sorting and screening device for anti-clogging material according to claim 2, characterized in that: The wear-resistant slugging component (62) includes a wear-resistant slugging guide (621). The top of the wear-resistant slugging guide (621) is provided with multiple dovetail slots (622) that engage with dovetail wedges (613) to achieve the clamping and fixing of the wear-resistant slugging guide (621) and the flexible slugging component (61). The inner wall of the wear-resistant slugging guide (621) is provided with multiple locking grooves (623).

4. The quartz sand sorting and screening device for anti-clogging material according to claim 3, characterized in that: The locking component (63) includes multiple ratchet barbs (631), which are installed inside multiple locking grooves (623). Both outer surfaces of the multiple ratchet barbs (631) are engaged with ratchet locking blocks (632) to further lock the flexible material feeding component (61) and the wear-resistant material feeding component (62) and prevent loosening. Each pair of adjacent ratchet locking blocks (632) forms a group. One outer surface of each group of ratchet locking blocks (632) is fixedly installed with a fixing block (633). The top of each fixing block (633) is provided with an arc-shaped slot (634). Multiple resistance rods (636) are fixedly installed at the top of the outer surface of the reinforcing component (612).

5. The quartz sand sorting and screening device for anti-clogging material according to claim 4, characterized in that: The outer surfaces of the multiple resistance rods (636) are movably fitted with arc-shaped limiting blocks (635), and one end of the arc-shaped limiting block (635) is movably embedded in the inside of the arc-shaped slot (634) to limit the fixing block (633) and the ratchet locking block (632). The outer surface of the reinforcing component (612) is provided with multiple movable holes (614), and the outer surface of the flexible material guide strip (611) is provided with multiple movable cavities (615).

6. The quartz sand sorting and screening device for anti-clogging material according to claim 5, characterized in that: The outer surfaces of the multiple ratchet locking blocks (632) are respectively movably embedded in the interior of the multiple movable holes (614), the multiple sets of ratchet locking blocks (632) are respectively movably embedded in the interior of the multiple locking grooves (623), and the multiple resistance rods (636) and arc-shaped limiting blocks (635) are all located on the top surface inside the movable cavity (615).

7. The quartz sand sorting and screening device for anti-clogging material according to claim 1, characterized in that: The bottom of the embedded part (321) is fixedly installed with a limiting part (323), and the outer surface of the top of the vibrating main body (322) is fixedly installed with a wear-resistant ring (326) to improve the overall wear resistance of the vibrating main body (322). The mesh wire intersection of the sorting screen body (3) is provided with an installation groove (31), and the micro elastic self-vibrator (32) is fixedly installed inside the installation groove (31).

8. The quartz sand sorting and screening device for anti-clogging material according to claim 1, characterized in that: The auxiliary screen cleaning component (4) includes an ultrasonic generating system (11), an ultrasonic transducer (43), and a spring damping seat (42). The ultrasonic generating system (11) is mounted on the top of the PLC electrical control system (10) by a bracket. Multiple ultrasonic transducers (43) are provided and are respectively mounted at the four corners of the top of the screen frame (2) by spring damping seats (42). The spring damping seats (42) are used to isolate the low-frequency large-amplitude vibration of the screen frame (2). Protective covers (41) are installed at the four corners of the top of the screen frame (2) by bolts to protect the ultrasonic transducers (43).

9. The quartz sand sorting and screening device for anti-clogging material according to claim 1, characterized in that: The pulse jet cleaning assembly (5) includes a reinforced base frame (501), which is installed inside the screen frame (2) and located below the sorting screen body (3). The reinforced base frame (501) has a sealed air chamber (502) inside. The top of the reinforced base frame (501) has multiple micro-jet nozzles (503) facing the sorting screen body (3) for spraying pulse airflow into the screen holes. An air inlet pipe (504) is fixedly connected to the outer surface of the reinforced base frame (501). A pulse solenoid valve (505) is provided at the input end of the air inlet pipe (504), and its input end is connected to the output end of the pulse jet device through an elastic pipe.

10. The quartz sand sorting and screening device for anti-clogging material according to claim 1, characterized in that: The screen frame (2) is installed inside the screen box (1), and the sorting screen body (3) is installed on the top surface inside the screen frame (2). Two vibrators (7) are provided and installed on the front surface of the screen box (1) to drive the screen box (1) and the sorting screen body (3) to perform linear reciprocating vibration. Multiple vibration spring seats (9) are installed between the outer surface of the screen box (1) and the base frame (8) through the mounting bracket. A discharge device (12) is fixedly installed on one side of the outer surface of the screen frame (2), and a hopper (13) is fixedly installed at the bottom of the screen box (1).

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