An automatic screening and dispensing apparatus

Abstract

The utility model provides a kind of automatic screening and discharging equipment, including by wallboard continuously surrounding to form the bunker for containing polyester particles;It is contained in the interior of bunker and is surrounded by wallboard and forms annular channel's cylindrical limiting component, including the body being set in the interior of bunker along vertical direction, with the body connection and the setting of the bulk material shunt protrusion of polyester particle feeding direction is directed and the stirring part of thread-like around body setting;And, around the interior space of bunker and embedded in wallboard to adsorb scrap iron electromagnetic component.In the present application, the maximum "range of activity" of polyester particles is surrounded by limiting component and wallboard, i.e. annular channel, so that the scrap iron therein can completely fall into the adsorption range of the electromagnetic component embedded in the wallboard, ensuring that the scrap iron in polyester particles can be completely adsorbed, thereby solving the problem of insufficient iron removal.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical fiber production and preparation, and in particular to an automatic screening and feeding device. Background Technology

[0002] In the process of chemical fiber production, polyester granules need to be dried, impurities removed, and then extruded. The most important part of removing impurities is removing the iron filings contained within them.

[0003] For example, in our company's previously developed recycled raw material feeding mechanism (publication number CN219991791U), the feeding box is equipped with a vibrating screen and a vibrating motor to drive the screen. To effectively remove iron filings from the polyester granules, a magnetic screen is typically used for filtration. However, with prolonged use, iron filings gradually clog the filter. This reduces the adsorption effect on iron filings and decreases the filtration efficiency due to clogging, requiring technicians to replace the filter. Furthermore, the vibration of the filter assembly may shake the iron filings adsorbed on the magnets back into the polyester granules.

[0004] Therefore, this utility model provides an automatic screening and feeding device with excellent iron filings adsorption effect and stable output. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an automatic screening and feeding device, which has the advantages of excellent iron filings adsorption effect and stable output.

[0006] To achieve the above and other related objectives, this utility model provides the following technical solution: An automatic screening and discharging device includes a hopper formed by continuous surrounding wall panels for holding polyester particles; a columnar limiting assembly housed inside the hopper and surrounding the wall panels to form an annular channel, including a body disposed vertically inside the hopper, a material diversion protrusion connected to the body and disposed in the direction of polyester particle feeding, and a stirring part disposed in a spiral shape around the body; and an electromagnetic assembly surrounding the internal space of the hopper and embedded in the wall panels for adsorbing iron filings.

[0007] To achieve the above technical solution, the limiting component and the wall plate enclose the polyester particles to create their maximum "movement range," i.e., an annular channel, so that the iron filings can fall completely into the adsorption range of the electromagnetic component embedded in the wall plate, ensuring that the iron filings in the polyester particles can be completely adsorbed, thereby solving the problem of insufficient iron removal.

[0008] Furthermore, the bulk material diversion protrusion is a hemispherical or conical structure facing the incoming material direction, with a smooth transition between it and the main body.

[0009] To achieve the above technical solution, the falling polyester particles can be evenly distributed in all directions by setting up the bulk material diversion protrusion, avoiding the material from accumulating on the top of the limiting component.

[0010] Furthermore, the stirring part is located on the side of the body facing the annular channel, and is arranged on the outside of the body along the axial direction of the body.

[0011] To achieve the above technical solution, the design of the spiral stirring part rotating with the main body can not only stir the material and prevent the polyester particles from clumping, but also slow down the falling speed of the polyester particles through the spiral structure, prolonging the contact time between the polyester particles and the electromagnet, ensuring that the iron filings can be completely adsorbed.

[0012] Furthermore, it also includes a rotary drive unit located above the hopper. The output end of the rotary drive unit extends vertically into the hopper and is connected to the limiting component to drive the limiting component to rotate within the hopper.

[0013] To achieve the above technical solution, the rotation speed is adjusted to adapt to polyester particles of different qualities, ensuring that polyester particles of different qualities can be evenly dispersed and stably fed, while avoiding excessively fast feeding of polyester particles.

[0014] Furthermore, the electromagnetic component includes an electromagnet embedded in the wall panel and a control unit that is electrically connected to the electromagnet via a wiring harness and controls the periodic switching of the electromagnet.

[0015] The above technical solution utilizes the "periodic switching" of an electromagnet. When energized, it attracts iron filings from falling polyester granules; when de-energized, the iron filings fall off under gravity. Simultaneously, the electromagnet is embedded in the wall panel, preventing the formation of dead zones for chip removal on the inner wall of the hopper after power failure and avoiding damage to the electromagnet due to friction between the material and the electromagnet. The electromagnet's design avoids the clogging that occurs with fixed magnets after attracting iron filings, which can lead to a decrease in subsequent iron removal efficiency. Furthermore, it eliminates the need for shaking, preventing iron filings from falling back into the material, thus fundamentally solving secondary pollution. Cleaning is simple, and maintenance is convenient.

[0016] Furthermore, the hopper also includes a feed inlet for feeding materials, a discharge outlet located at the bottom of the hopper, and a discharge assembly located below the discharge outlet.

[0017] To achieve the above technical solution, a connected polyester particle screening channel is formed by interconnected feed inlets, annular channels, discharge and unloading components arranged sequentially.

[0018] Furthermore, the feeding assembly includes a valve installed at the discharge port to control the opening and closing of the discharge port, a raw material box for receiving the filtered polyester particles, and a weight sensor.

[0019] To achieve the above technical solution, a closed-loop control of "feeding-monitoring-valve closing" is formed by real-time feedback of material weight from weight sensors. This allows for precise control of the polyester granules' weight, meeting the process requirements of precise polyester granule supply and convenient subsequent proportioning in chemical fiber production. It also avoids idling caused by overload or insufficient material supply in downstream extruders, improves the service life of downstream equipment, and reduces the probability of downtime due to malfunctions.

[0020] Furthermore, a filter screen is installed upstream of the limiting component in the hopper along the direction of polyester particle feeding.

[0021] The above technical solution achieves the goal of intercepting large impurities in the material through a filter screen, preventing them from entering the annular channel and clogging or getting stuck at the valve, thus causing the "quantitative supply" to fail and reducing the maintenance frequency of core components.

[0022] Furthermore, it also includes transfer vehicles used to move silos.

[0023] To achieve the above technical solution, the bottom of the transfer vehicle is equipped with universal wheels with brakes, which can support 360° turning and can be locked in place by braking, thus balancing the needs of flexible movement and stable material supply.

[0024] As described above, the automatic screening and feeding device of this utility model has the following beneficial effects: 1. In this application, the polyester particles are enclosed by the limiting component and the wall plate to form their maximum "moving range", that is, an annular channel, so that the iron filings can fall completely into the adsorption range of the electromagnetic component embedded in the wall plate, ensuring that the iron filings in the polyester particles can be completely adsorbed, thereby solving the problem of insufficient iron removal.

[0025] 2. In this application, the electromagnet is periodically switched on and off. When energized, it attracts iron filings from falling polyester granules; when de-energized, the iron filings fall off under gravity. Simultaneously, the electromagnet is embedded in the wall panel, preventing the formation of dead zones for chip removal on the inner wall of the hopper after power failure and avoiding damage to the electromagnet due to friction between the material and the electromagnet. The electromagnet design avoids the blockage that occurs with fixed magnets after attracting iron filings, which can lead to a decrease in subsequent iron removal efficiency. Furthermore, it eliminates the need for shaking, preventing iron filings from falling back into the material, thus solving the problem of secondary pollution at its source. Cleaning is simple and maintenance is convenient. Attached Figure Description

[0026] Figure 1 The diagram shown is a structural schematic of an automatic screening and feeding device according to this utility model.

[0027] Figure 2 The image shown is a cross-sectional view of an automatic screening and feeding device according to this utility model.

[0028] Figure 3The diagram shown is a structural schematic of the valve in this utility model.

[0029] The components include: 1. hopper; 110. wall panel; 11. feed inlet; 12. discharge outlet; 13. feeding assembly; 131. valve; 132. raw material box; 133. weight sensor; 2. limit assembly; 21. body; 22. bulk material diversion protrusion; 23. mixing section; 3. electromagnetic assembly; 31. electromagnet; 5. rotary drive unit; 6. filter screen; 7. transfer vehicle. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] Please see Figure 1-3 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0032] Please see Figures 1 to 3 This utility model provides an automatic screening and discharging device, including a hopper 1 formed by a continuous wall panel 110 for holding polyester particles, a columnar limiting component 2 housed inside the hopper 1 and forming an annular channel with the wall panel 110, and an electromagnetic component 3 surrounding the internal space of the hopper 1 and embedded in the wall panel 110 for adsorbing iron filings. The wall panel 110 has a double-layer structure of "inner wear-resistant layer + outer protective shell". The electromagnetic component 3 is embedded in the double-layer structure, and the outer protective shell can isolate external impacts and prevent direct damage to the electromagnetic component 3 from bumps.

[0033] Specifically, the limiting component 2 includes a body 21 disposed vertically inside the hopper 1, a bulk material diversion protrusion 22 connected to the body 21 and disposed toward the polyester particle feeding direction, and a stirring part 23 threaded around the body 21.

[0034] The bulk material diversion protrusion 22 has a smooth surface, which guides the falling polyester particles toward the circumference of the body 21. The limiting component 2 and the wall plate 110 enclose the polyester particles to form their maximum "range of movement", that is, an annular channel, so that the iron filings can fall completely into the adsorption range of the electromagnetic component 3 embedded in the wall plate 110, ensuring that the iron filings in the polyester particles can be completely adsorbed, thereby solving the problem of insufficient iron removal.

[0035] Furthermore, the bulk material diversion protrusion 22 is a hemispherical or conical structure facing the material inlet direction; it has a smooth transition with the body 21, which can evenly divert the falling polyester particles to the surrounding area and prevent the material from accumulating on the top of the limiting component 2.

[0036] This invention does not limit the material of the limiting component 2, as long as it does not affect the magnetic field of the electromagnetic component 3, such as engineering plastics, aluminum alloys or 304 stainless steel.

[0037] Please continue reading. Figure 2 The stirring part 23 is located on the side of the body 21 facing the annular channel and is arranged on the outside of the body 21 along the axial direction of the body 21.

[0038] The spiral-shaped stirring part 23 rotates with the main body 21, which can not only stir the material and prevent the polyester particles from clumping, but also slow down the falling speed of the polyester particles through the spiral structure, prolong the contact time between the polyester particles and the electromagnet 31, and ensure that the iron filings can be completely adsorbed.

[0039] Please continue to participate. Figure 2 It also includes a rotary drive unit 5 located above the hopper 1.

[0040] Specifically, the output end of the rotary drive unit 5 extends vertically into the hopper 1 and is connected to the limiting component 2 to drive the limiting component 2 to rotate within the hopper 1.

[0041] Among them, the rotary drive unit 5 is a servo motor, which adapts to polyester particles of different qualities by adjusting the rotation speed, ensuring that polyester particles of different qualities can be evenly dispersed and stably fed, while avoiding the polyester particles being fed too quickly.

[0042] It should be noted that the servo motor and the limit component 2 are detachably connected through a quick-release coupling. By replacing the limit component 2 with different sizes, the size of the annular channel can be changed to accommodate polyester particles of different diameters.

[0043] Please continue reading. Figure 3 The electromagnetic component 3 includes an electromagnet 31 embedded in the wall panel 110, a PLC control unit that is electrically connected to the electromagnet 31 via a wiring harness and controls the periodic switching of the electromagnet 31, and the magnitude of the current flowing through the electromagnet.

[0044] By periodically switching the electromagnet 31 on and off, iron filings in the falling polyester granules are adsorbed when energized; when de-energized, the iron filings fall off under gravity. Simultaneously, the electromagnet 31 is embedded in the wall panel 110, preventing the formation of dead zones for chip removal on the inner wall of the hopper 1 and avoiding damage to the electromagnet 31 due to friction between the material and the electromagnet 31 after power failure. The design of the electromagnet 31 avoids the blockage that occurs with fixed magnets after adsorbing iron filings, which can lead to a decrease in subsequent iron removal efficiency. Furthermore, it eliminates the need for shaking, preventing iron filings from falling back into the material, thus solving secondary pollution at its source. Cleaning is simple and maintenance is convenient. Moreover, by changing the current flowing through the electromagnet 31 via the PLC control unit, the magnetic field of the electromagnet 31 can be quickly altered, thus changing its adsorption capacity for iron filings, to meet the adsorption and removal needs of iron filings in polyester granules with different feeding speeds.

[0045] Preferably, the side of the electromagnetic component 3 facing the outer wall of the silo 1, i.e. the outer protective shell, has a heat dissipation window (not shown in the figure) facing the outside of the silo 1. The outside air communicates with the inside of the wall panel 110 through the heat dissipation window, so as to use the outside natural wind or the external fan to dissipate heat from the electromagnet 31, remove the heat generated by the electromagnet 31 when it is working, and prevent the temperature from being conducted to the inside of the silo 1 through the wall panel 110, which would cause the temperature of the polyester particles to rise.

[0046] It should be noted that the energizing time of the electromagnet 31 can be adjusted according to the iron content in the batch of materials. If the iron content of the batch of materials is high, the energizing time can be shortened; if the iron content of the materials is low, the energizing time can be extended.

[0047] Please continue reading. Figures 1 to 2 The hopper 1 also includes a feed inlet 11 for feeding materials, a discharge outlet 12 located at the bottom of the hopper 1, and a discharge assembly 13 located below the discharge outlet 12.

[0048] Polyester granules enter the feeding assembly 13 from the feed inlet 11, pass through the annular channel, and fall from the discharge outlet 12, forming a connected material channel.

[0049] Specifically, the feeding assembly 13 includes a valve 131 installed at the discharge port 12 to control the opening and closing of the discharge port 12, a raw material box 132 for receiving filtered polyester particles, and a weight sensor 133. The valve 131 includes several valve plates 1311 that rotate to move away from or towards each other, a driven gear set 1312 installed on the valve plates 1311 and driving their rotation, and a rotary drive unit 1313 that drives the driven gear set 1312 to rotate. The rotary drive unit 1313 is a servo motor, and the PLC control unit sends electrical signals to the servo motor to drive the driven gear set 1312 and the valve plates 1311 to rotate, thus opening and closing the valve 131. Of course, when the electromagnet 31 is de-energized, the raw material box 132 also functions as a "scrape myrtle collection box". After the technician opens valve 131 to discharge the remaining polyester granules in hopper 1, the electromagnet 31 is still energized, and the iron filings are still adsorbed on the inner wall of the wall panel 110. When the empty raw material box 132 is placed back below the discharge port 12 by the technician, the electromagnet 31 is de-energized, and the iron filings adsorbed on the wall panel 110 fall down the inner wall of hopper 1 and into the raw material box 132 from the discharge port 12. Finally, the technician collects the iron filings and processes them. The raw material box 132 is placed below the discharge port 12, the electromagnet 31 is energized, and the next feeding cycle begins.

[0050] Furthermore, the PLC control unit is electrically connected to the drive motor and the weight sensor 133. By monitoring the material weight in real time from the weight sensor 133, a closed-loop control of "feeding-monitoring-valve closing" is formed to accurately control the weight of polyester granules. This meets the process requirements of precise supply of polyester granules and convenient subsequent proportioning in chemical fiber production, avoids idling caused by overload or insufficient supply of downstream extruders, improves the service life of downstream equipment, and reduces the probability of downtime due to malfunctions.

[0051] In addition, the PLC control unit also monitors the rate of increase of the value of the weight sensor 133. When the value of the weight sensor 133 increases at an accelerating rate of weight change, it indicates that the feeding speed of the polyester particles is increasing. At this time, the PLC controller should increase the current flowing through the electromagnet 31 to enhance the adsorption strength of the electromagnet 31 on the iron filings and prevent the iron filings from flowing out with the polyester particles without being fully adsorbed.

[0052] Please continue reading. Figure 2 Inside the hopper 1, a filter screen 6 is also provided upstream of the limiting component 2 along the direction of polyester particle feeding.

[0053] Specifically, the filter screen 6 and the hopper 1 are connected by a snap-fit ​​detachable connection to intercept large impurities in the material, preventing them from entering the annular channel and clogging or getting stuck at valve 131, thus causing the aforementioned "quantitative supply" to fail and reducing the maintenance frequency of core components. At the same time, the filter screen 6 also plays a certain "deceleration role" for the polyester particles, buffering the discharge of polyester particles and preventing the polyester particles entering the hopper 1 from being discharged too quickly.

[0054] Meanwhile, the snap-on connection makes it easy to disassemble and clean the filter screen 6, improving maintenance efficiency; of course, different screens can also be replaced according to the diameter of the polyester particles.

[0055] Please continue reading. Figure 1 It also includes a transfer vehicle 7 used to transfer the material bin 1.

[0056] Specifically, the bottom of the transfer vehicle 7 is equipped with universal wheels with brakes, which can support 360° turning and can also be locked in place by braking, balancing the needs of flexible movement and stable material supply.

[0057] Additionally, it should be noted that the PLC control unit is electrically connected to the rotary drive unit 5, drive motor, electromagnet 31, and weight sensor 133. It includes a built-in programmable controller and interactive screen, which allows operators to set the on / off cycle of the electromagnet 31, the rotation speed of the rotary drive unit 5, and monitor the weight of the material in the raw material box 132 in real time and control the opening and closing of the valve 131.

[0058] The implementation principle of the automatic screening and feeding device of this utility model is as follows: The operator releases the brake of the transfer vehicle 7, pushes the equipment to the chemical fiber production station, and locks the brake; then, the polyester granules to be processed are poured into the hopper 1 from the feed inlet 11. The granules are screened by the upstream filter screen 6, and large impurities are intercepted on the filter screen 6; then, the equipment is started, the rotary drive unit 5 drives the columnar limiting component 2 to rotate evenly, and the material distribution protrusion 22 disperses the screened polyester granules into the annular channel. The spiral stirring part 23 is used to stir the polyester granules and slow down their falling speed; During operation, the operator sets a quantitative value to the PLC, causing the electromagnet 31 to periodically switch on and off under the control of the PLC control unit. Iron filings in the polyester granules are adsorbed onto the inner wall of the hopper 1. Subsequently, the purified polyester granules fall into the raw material box 132. The weight sensor 133 feeds back the weight signal to the PLC control unit in real time. When the weight reaches the preset value, the PLC controls the valve 131 to close. Technicians remove the raw material box 132 containing the polyester granules that has reached the specified weight, completing the quantitative supply. The empty raw material box 132 is then placed back below the discharge port 12 for the next feeding process. After the equipment has been running for a period of time, the granules stop feeding, the electromagnet 31 is de-energized, and the iron filings adsorbed on the inner wall of the hopper 1 slide down the inner wall of the hopper 1 under the action of gravity into the raw material box 132. Technicians then collect and process the iron filings, completing the cleaning of the hopper 1.

[0059] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An automatic screening and feeding device, characterized in that, include: A hopper (1) for containing polyester granules is formed by a continuous surrounding wall panel (110); The columnar limiting assembly (2), which is housed inside the silo (1) and surrounds the wall panel (110) to form an annular channel, includes a body (21) disposed vertically inside the silo (1), a bulk material diversion protrusion (22) connected to the body (21) and disposed toward the polyester particle feeding direction, and a stirring part (23) disposed in a spiral shape around the body (21); And an electromagnetic assembly (3) surrounding the interior space of the hopper (1) and embedded in the wall panel (110) for adsorbing iron filings.

2. The automatic screening and feeding device according to claim 1, characterized in that, The bulk material diversion protrusion (22) is a hemispherical or conical structure facing the material inlet direction, and it has a smooth transition with the body (21).

3. The automatic screening and feeding device according to claim 2, characterized in that, The stirring part (23) is located on the side of the body (21) facing the annular channel, and is arranged on the outside of the body (21) along the axial direction of the body (21).

4. The automatic screening and feeding device according to claim 1, characterized in that, It also includes a rotary drive unit (5) located above the hopper (1). The output end of the rotary drive unit (5) extends vertically into the hopper (1) and is connected to the limiting component (2) to drive the limiting component (2) to rotate within the hopper (1).

5. The automatic screening and feeding device according to claim 1, characterized in that, The electromagnetic component (3) includes an electromagnet (31) embedded in the wall panel (110) and a control unit that is electrically connected to the electromagnet (31) via a wire harness and controls the periodic switching of the electromagnet (31).

6. The automatic screening and feeding device according to claim 1, characterized in that, The hopper (1) also includes a feed inlet (11) for feeding materials, a discharge outlet (12) located at the bottom of the hopper (1), and a discharge assembly (13) located below the discharge outlet (12).

7. The automatic screening and feeding device according to claim 6, characterized in that, The feeding assembly (13) includes a valve (131) installed at the discharge port (12) to control the discharge from the discharge port (12), a raw material box (132) for receiving the filtered polyester particles, and a weight sensor (133).

8. The automatic screening and discharging equipment according to claim 1, characterized in that, Inside the hopper (1), a filter screen (6) is also provided upstream of the limiting component (2) along the direction of polyester particle feeding.

9. The automatic screening and discharging equipment according to claim 1, characterized in that, It also includes a transfer vehicle (7) for transferring the silo (1).

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