New type of PP material dust removal and sorting device

Abstract

This novel dust removal and sorting device for PP materials belongs to the technical field of sorting equipment. It includes a motor reduction mechanism, a screening cylinder, a feed hopper, a support base, an electric proportional valve, a wireless remote control module, sorting and mixing blades, an air compressor, and a collection bag. It also features a material level monitoring circuit, a gear control circuit, and a solenoid valve. The motor reduction mechanism, screening cylinder, feed hopper, support base, electric proportional valve, wireless remote control module, sorting and mixing blades, air compressor, and collection bag are all installed together. The material level monitoring circuit and gear control circuit are housed in a component box. This device provides a notification to the operator when sufficient material is added to the screening cylinder, facilitating material feeding. Through remote control switching, operators can non-contactly adjust the equipment for automatic dust removal or two-stage separation of fine particles, thus improving work efficiency and saving production costs. In summary, this invention has promising application prospects.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for PP granule production, and in particular to a novel dust removal and sorting device for PP materials. Background Technology

[0002] PP material, or polypropylene (PP for short), is usually a white, waxy solid with the chemical formula (C3H6)n. Its density ranges from 0.89 to 0.92 g / cm³, making it the lowest density thermoplastic resin. Its melting point is 164–176 °C, softening around 55 °C, and its operating temperature range is -30 to 140 °C. Polypropylene is lightweight, wear-resistant, antibacterial, and easily dyeable, and is widely used in the manufacture of casings and components for appliances such as refrigerators, washing machines, air conditioners, and televisions (in production, molten PP granules are extruded into molds using an extruder and then shaped through various processes). PP production involves first blending and hot-extruding multiple raw materials using an extruder. The resulting molten material is then cooled by a water-cooling system, wound by an electric winding mechanism, and subsequently dried and pelletized to produce finished PP granules, providing raw materials for downstream production. During the production of PP granules, or when they are packaged, dust from the surrounding environment inevitably enters the packaging bag, which can have an adverse effect on the subsequent production of finished products from the PP granules.

[0003] In the existing technology, when using PP granules as raw materials, the manufacturer will treat the dust in the PP granules. The current method of dust removal for PP granules is generally to use a vibrating screen. The vibrating screen dust removal method can only screen dust with a corresponding outer diameter of less than a certain size because the screen mesh has a uniform aperture. If the inner diameter of the screen hole is too small, it will not be able to effectively screen out the dust particles with a large outer diameter, and the screening effect will not be good. On the contrary, if the inner diameter of the screen hole is too large, it will cause the finished PP granules to be mixed with particulate impurities, which will lead to unnecessary waste. In addition, when producing PP granule raw materials, due to the influence of processing technology and materials, the processed PP granule raw materials are not all uniform in size. In fact, when PP granules with too small a particle size are used to produce products, there are also the following technical problems: (1) Decreased processing performance. The particle size of the raw material (PP granules) is too small, which will increase the specific surface area, resulting in increased melting difficulty and prolonged melting time. At the same time, it may cause the extruder screw torque to increase and the equipment wear to intensify. (2) Product quality fluctuations and shortened residence time of fine raw materials in the screw cavity may lead to insufficient plasticization, resulting in rough particle surfaces and uneven internal structures, and in severe cases, material blockage. (3) Raw materials that are too small may reduce screw conveying efficiency, causing a mismatch between the feeding speed and the screw rotation speed, which in turn affects production continuity and capacity output. If the vibrating screen is to remove dust and fine particles from the granular raw materials, at least two screening processes are required to achieve the purpose, which will lead to increased production costs and is not conducive to improving work efficiency. Utility Model Content

[0004] In order to overcome the shortcomings of existing PP granule dust removal and fine particle screening equipment due to structural limitations, as described in the background art, this utility model provides a new type of PP material dust removal and sorting device that, through remote control switching, allows operators to adjust the equipment non-contactly to automatically perform dust removal or two-stage separation of fine particle materials under the combined action of related structures. This brings convenience to the operators, improves work efficiency, and saves production costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A novel dust removal and sorting device for PP materials includes a motor reduction mechanism, a screening cylinder, a feed hopper, a support base, an electric proportional valve, a wireless remote control module, sorting and mixing blades, an air compressor, and a collection bag. It also features a material level monitoring circuit, a gear control circuit, and a solenoid valve. At least two support bases and solenoid valves are present. The lower ends of the screening cylinder are fixedly mounted on two support bases, and a discharge pipe is fixedly installed on the lower exterior of the screening cylinder. One end of the first solenoid valve is fixedly connected to the lower end of the discharge pipe. A feed pipe is fixedly installed on one side of the upper exterior of the screening cylinder. The discharge pipe of the feed hopper is fixedly connected to one end of the second solenoid valve, and the lower end of the second solenoid valve is fixedly connected to the upper end of the feed pipe. Two openings are located on one side of the outer end of the screening cylinder. The motor reduction mechanism is fixedly installed on the outer end of the screening cylinder, and its rotating shaft rotates within one of these openings. One end of the shaft of the sorting and stirring blades is fixedly installed together with the rotating shaft. A bearing is fixedly installed on one end of the inner side of the screening cylinder, and the other end of the shaft of the sorting and stirring blades is fixedly installed in the inner ring of the bearing. A separation pipe is fixedly installed on the outer side of the upper middle part of the screening cylinder. An air inlet pipe is fixedly installed on one side of the separation pipe. The air inlet pipe is fixedly connected to the exhaust pipe of the electric proportional valve. The air inlet pipe of the electric proportional valve is fixedly connected to the exhaust end of the air compressor's air tank. An upper flange plate and an upper magnet are fixedly installed on the other side of the separation pipe. There are multiple collection bags. Each collection bag has a fixed and sealed upper end with a fixing pipe, a lower flange plate, and a lower magnet. One of the collection bags is attracted and installed on the lower end of the other side of the separation pipe. The gear control circuit and the material level monitoring circuit are installed in the component box. The signal output terminal of the gear control circuit and the signal input terminal of the electric proportional valve are connected by wires.

[0006] Preferably, the solenoid valve is a normally closed solenoid valve.

[0007] Preferably, the lower ends of the screening cylinder are higher on both sides and lower in the middle.

[0008] Preferably, the lower end of the upper magnet and the upper end of the lower magnet have opposite polarities, a sealing ring is fixedly installed at the lower end of the upper magnet, and the outer diameters of the upper magnet and the lower magnet are the same.

[0009] Preferably, the material level monitoring circuit includes a photoelectric detection switch and an indicator light connected by wires. The photoelectric detection switch is fixedly and sealed in the second opening on one side of the outer end of the screening cylinder. The power output terminal of the photoelectric detection switch and the power input terminal of the indicator light are connected by wires.

[0010] Preferably, the gear control circuit includes a wireless receiving circuit module, resistors, adjustable resistors, and indicator lights connected by wires. The three power output terminals of the wireless receiving circuit module are connected to one end of each of the three adjustable resistors and the positive power input terminals of the three indicator lights, respectively. The other end of each of the three adjustable resistors is connected to one end of each of the three resistors, respectively. The negative power input terminal of the wireless receiving circuit module is connected to the other end of each of the three resistors and the negative power input terminal of the three indicator lights.

[0011] Compared with the prior art, the advantages of this utility model are: (1) When the raw materials are loaded into the screening cylinder, the material level monitoring circuit can light up the indicator light to remind the staff when there are enough raw materials, which brings convenience to the feeding. (2) The staff can control the equipment through the wireless remote control module, and the gear control circuit outputs to the electric proportional valve signal input terminal. Different voltage signals can control the generation of different negative pressures in the separation tube. In this way, the staff can adjust the equipment to automatically perform dust removal or two-stage separation of fine particles without contact, which brings convenience to the staff, improves work efficiency, and saves production costs. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation

[0015] Figure 1 , 2As shown, the novel PP material dust removal and sorting device includes a motor reduction mechanism M (a 3KW coaxial motor gear reducer), a screening cylinder 1, a feed hopper 2, a support base 3, an electric proportional valve E3, a wireless remote control module E5 (which can be carried by the operator), sorting and mixing blades 4, an air compressor (not shown in the figure, but specifically installed at the rear of the overall equipment), a power switch, a power module E1, and a collection bag 5. It also has a material level monitoring circuit 6, a gear control circuit 7, and solenoid valves DC1 and DC2. There are at least two support bases 3. The lower left and right outer ends of the screening cylinder 1 are respectively fixedly installed on two support bases 3, and the lower ends of the two support bases 3 are respectively fixedly installed on the ground of the work station. The lower middle part of the screening cylinder 1 is fixedly installed on... The sieve cylinder 1 is equipped with a discharge pipe 101 that communicates with its interior. It has at least two solenoid valves. The upper end of the first solenoid valve DC1 is fixedly connected to the lower end of the discharge pipe 101. A finished product hopper (not shown in the figure) with an open upper structure is movably placed at the lower end of the first solenoid valve DC1. A feed pipe 102 that communicates with its interior is fixedly installed on the upper right side of the upper end of the sieve cylinder 1. The discharge pipe at the lower middle of the feed hopper 2 is fixedly connected to the upper end of the second solenoid valve DC2. The lower end of the second solenoid valve DC2 is fixedly connected to the upper end of the feed pipe 102. The sieve cylinder 1 has an opening at the middle of its left outer end. A motor reduction mechanism M is fixedly installed at the middle of the outer end of the sieve cylinder 1, and its rotating shaft rotates within the opening. The left end of the shaft of the sorting and stirring blade 4 and the right end of the rotating shaft... The side ends are fixedly installed together. A bearing seat 103 (with a sealing ring installed between the inner and outer rings of the bearing) is fixedly installed in the middle of the inner right side of the screening cylinder 1. The right end of the shaft of the sorting and stirring blade 4 is fixedly installed in the inner ring of the bearing seat 103. A "¬"-shaped separation pipe 104 communicating with the inside is fixedly installed on the outer side of the upper middle part of the screening cylinder 1. An air inlet pipe 105 communicating with the inside is fixedly installed on the upper right side of the separation pipe 104. The right end of the air inlet pipe 105 is fixedly connected to the exhaust pipe of the electric proportional valve E3. The air inlet pipe of the electric proportional valve E3 is fixedly connected to the exhaust end of the air compressor storage tank. An upper flange plate is fixedly installed on the outer side of the lower left end of the separation pipe 104. A ring is fixedly installed on the lower end of the upper flange plate with adhesive. A hollow permanent magnet 1041 is used. There are multiple collection bags 5. Each collection bag has a fixed and sealed tube at its upper end. A lower flange plate is fixedly installed on the outer side of the upper end of the fixed tube. A ring-shaped hollow permanent magnet 1042 is glued and fixedly installed on the upper end of the lower flange plate. One of the collection bags 5 is attracted to the lower end of the upper magnet 1041 by the lower magnet 1042, and one of the collection bags 5 is sealed and installed at the lower left end of the separation tube 104 (the collection bag is attracted by the magnet, which makes it easy to remove and install the collection bag). The power switches S1, S2, S3, power module E1, gear control circuit 6, and material level monitoring circuit 7 are installed on the circuit board inside the component box 8. The component box 8 is fixedly installed on the front side of the left end support 3.

[0016] Figure 1 , 2 As shown, solenoid valves DC1 and DC2 are normally closed solenoid valves. The lower end of the screening cylinder 1 is higher on both sides and lower in the middle (to facilitate the material falling out from the lower end of the discharge pipe 101). The lower end of the upper magnet 1041 and the upper end of the lower magnet 1042 have opposite polarities. A hollow annular sealing ring is fixedly installed at the lower end of the upper magnet 1041 (sealing the outer side between the upper and lower magnets). The outer diameters of the upper magnet 1041 and the lower magnet 1042 are the same. The material level monitoring circuit includes a photoelectric detection switch E2 and an indicator light H connected by wires. There is a mounting hole in the upper middle part of the left side of the screening cylinder 1. The photoelectric detection switch E2 is fixedly and sealed in the mounting hole, and its detection head is located on the left side inside the screening cylinder 1. The power output terminals 3 and 2 of the photoelectric detection switch E2 and the power input terminals of the indicator light H are respectively connected by wires. The gear control circuit includes a wireless receiver circuit module E4 connected via circuit board wiring, resistors R1, R2, and R3, adjustable resistors RP1, RP2, and RP3, indicator lights H1, H2, and H3. The three power output terminals (pins 3, 4, and 5) of the wireless receiver circuit module E4 are connected to one end of the three adjustable resistors RP1, RP2, and RP3 and the positive power input terminals of the three indicator lights H1, H2, and H3, respectively. The other ends of the three adjustable resistors RP1, RP2, and RP3 are connected to one end of the three resistors R1, R2, and R3, respectively. The negative power input terminal of the wireless receiver circuit module is connected to the other end of the three resistors R1, R2, and R3 and the negative power input terminal of the three indicator lights H1, H2, and H3.

[0017] Figure 1 , 2 As shown, the power input terminals 1 and 2 of power module E1 are connected to the two poles of the 220V AC power supply via wires. The power input terminal of the first power switch S1 is connected to the 380V AC power supply via wires. The power output terminal of power switch S1 is connected to the power input terminal of the motor reduction mechanism M via wires. The power output terminals 3 and 4 of power module E1 are connected to the power input terminals of the material level monitoring circuit, the photoelectric detection switch E2 (pins 1 and 2), the gear control circuit (pins 1 and 2), the wireless receiver circuit module E4, the electric proportional valve E3 (pins 1 and 2), and the power input terminals of power switches S2 and S3 via wires. One end of resistors R1, R2, and R3 at the signal output terminal of the gear control circuit is connected to the signal input terminal 3 of the electric proportional valve E3 (pin 4 is grounded) via wires. The power output terminals of power switches S2 and S3, and the negative power output terminal 4 of power module A1, are connected to the power input terminals of solenoid valves DC1 and DC2 via wires.

[0018] Figure 1 , 2As shown, after the 220V power supply enters the power input terminal of the power module E1, the power output terminal of the power module E1 will output a stable DC 24V power supply, which enters the power input terminals of the gear control circuit, the electric proportional valve, and the material level monitoring circuit. The above circuits and the electric proportional valve are energized and work. The usage process of this new type is as follows. The operator turns on the power switch S3, and the solenoid valve DC2 is energized and the valve core opens (and at the same time, the power switch S1 is turned on, and the shaft of the motor reducer M drives the sorting and stirring blades 4 to rotate). Then, the operator adds PP granular material that needs to be cleaned of dust and fine particles into the screening cylinder 1 through the feed hopper 2. Due to the rotation of the sorting and stirring blades 4 (the upper height of the sorting and stirring blades 4 is lower than the height of the probe of the photoelectric detection switch E2), the material continuously entering the screening cylinder 1 will gradually fill the screening cylinder 1; when there is less material in the screening cylinder 1, the height of the material is lower than When the height of the probe head of photoelectric detection switch E2 is not high, pin 3 of photoelectric detection switch E2 will not output a high level, and therefore, indicator light H will not be energized and illuminate. When there is a lot of material in screening cylinder 1, the height of the material is higher than the height of the probe head of photoelectric detection switch E2, and pin 3 of photoelectric detection switch E2 outputs a high level to the power input terminal of indicator light H. Then, indicator light H will be energized and illuminate, indicating to the operator that there is enough material. The operator can then turn off power switch S2, and solenoid valve DC2 will be de-energized and stop working, and the valve core will close (no more material will enter screening cylinder 1).When an operator presses the first transmitter button D1, or the second transmitter button D2, or the third transmitter button D3 of the wireless remote control module E5, the module will transmit a first, second, or third wireless closed signal. Upon receiving the signal, the wireless receiver module E4 will output a high-level signal from pins 3, 4, or 5, which will then enter the signal input terminal of the electric proportional valve E3 (simultaneously, indicator lights H1, H2, or H3 will illuminate, indicating whether the screening cylinder is currently screening larger particles, smaller particles, or dust). Since the resistance values ​​of the three resistors R1, R2, and R3 are identical, and the resistance value of the adjustable resistor RP1 is less than that of the adjustable resistor RP2... The resistance values ​​of adjustable resistor RP2 and RP3 are different. The voltage at the input terminal of the electric proportional valve E3 after voltage division by adjustable resistors RP1 and R1 is relatively high; the voltage at the input terminal of the electric proportional valve E3 after voltage division by adjustable resistors RP2 and R2 is relatively low; and the voltage at the input terminal of the electric proportional valve E2 after voltage division by adjustable resistors RP3 and R3 is the lowest. Therefore, under the function of the electric proportional valve E3, its valve core will open to a relatively large, small, and small extent respectively. The amount of compressed air entering the intake pipe from the air compressor's air tank through the electric proportional valve E3 will be relatively large, small, and small, respectively. This is reflected in the left end of the separator pipe 104. The generated negative pressure will be relatively large, small, or minimal. When the motor reduction mechanism M drives the sorting and mixing blades 4 to rotate, it will continuously lift the material in the screening cylinder 1. Thus, under the negative pressure generated in the separation tube 104, the dust or small-diameter raw materials floating at the upper part of the screening cylinder will continuously enter the collection bag 5 through the separation tube (the dust or small-diameter raw materials entering the collection bag remain in the collection bag, and the air is discharged to the atmosphere through several micropores distributed on the surface of the collection bag). In practice, the operator first controls the output of pin 5 of the wireless transmission circuit module E4 to be high. In this way, the air compressor outputs a relatively small amount of air into the separation tube 104, and the lighter dust in the screening cylinder enters the collection bag. Inside the bag; after a period of time (usually every 3 minutes), the operator controls pin 4 of the wireless transmission circuit module E4 to output a high level (a new collection bag can be replaced before control, otherwise dust and small-sized particles will mix). In this way, the air compressor outputs relatively more air into the separation tube 104, and the heavier unqualified particles in the screening cylinder enter the collection bag; after a period of time (usually every 3 minutes), the operator controls pin 3 of the wireless transmission circuit module E4 to output a high level. In this way, the air compressor outputs relatively more air into the separation tube 104, and the heavier (this particle size specification is still considered unqualified) unqualified particles in the screening cylinder enter the collection bag.As described above, when raw materials are loaded into the screening cylinder, the material level monitoring circuit can illuminate an indicator light to alert the operator once sufficient materials are available, facilitating material feeding. Operators can control the gear control circuit via a wireless remote control module, outputting different voltage signals to the electric proportional valve input terminal. This allows for the generation of different negative pressures within the separation tube, enabling operators to adjust the equipment non-contactly for automatic dust removal or two-stage separation of fine particles. This provides convenience, improves work efficiency, and saves production costs. Figure 2 As shown, power module E1 is a finished product of AC 220V to DC 24V power module; photoelectric detection switch E2 is a finished product of photoelectric switch model E3F-DS300C1, which has two power input terminals and one signal output terminal. When its detection head detects an obstacle, the output terminal outputs a high level. The detection distance is 30 cm. The photoelectric switch has a distance adjustment knob. Adjusting to the left reduces the detection distance, and adjusting to the right increases the detection distance (in this embodiment, it is adjusted to 4 cm); indicator lights H, H1, H2, and H3 are 0.5W indicator lights (the light-emitting surface is located outside the five openings at the front of the component box); electric proportional valve E3 is model R664AO; wireless receiving circuit module E4 and wireless remote control module. E5 is a finished four-channel wireless transceiver component of model TAD-T70A-100 (with the same structure and function as the vehicle wireless remote control and receiver module component); the resistance values ​​of resistors R1, R2, and R3 are 10K; the resistance values ​​of adjustable resistors RP1, RP2, and RP3 are 470K (in the production and application of this new type, technicians can adjust the different resistance values ​​of adjustable resistors RP1, RP2, and RP3 to adjust the voltage division between them and resistors R1, R2, and R3. When the voltage division is large, the voltage signal entering the electric proportional valve is relatively small, and the opening degree set by the valve core of the electric proportional valve is relatively small; conversely, the opening degree set by the valve core of the electric proportional valve is relatively large), and can be adjusted to 6K, 7K, and 8K respectively.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0020] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel dust removal and sorting device for PP materials, comprising a motor reduction mechanism, a screening cylinder, a feed hopper, a support base, an electric proportional valve, a wireless remote control module, sorting and mixing blades, an air compressor, and a collection bag, characterized in that, It also features a material level monitoring circuit, a gear control circuit, and a solenoid valve. There are at least two support bases and two solenoid valves. The lower ends of the screening cylinder are fixedly mounted on two support bases, and a discharge pipe is fixedly mounted on the lower exterior of the screening cylinder. One end of the first solenoid valve is fixedly connected to the lower end of the discharge pipe. A feed pipe is fixedly mounted on one side of the upper exterior of the screening cylinder. The discharge pipe of the feed hopper is fixedly connected to one end of the second solenoid valve, and the lower end of the second solenoid valve is fixedly connected to the upper end of the feed pipe. The outer end of the screening cylinder has two openings. A motor reduction mechanism is fixedly mounted on the outer end of the screening cylinder, and its rotating shaft rotates within one of the openings. One end of the shaft of the sorting and stirring blades is fixedly mounted to the rotating shaft. The inner end of the screening cylinder is fixed... The shaft of the sorting and mixing blades is fixedly installed inside the bearing inner ring at the other end. A separation pipe is fixedly installed on the upper middle part of the screening cylinder. An air inlet pipe is fixedly installed on one side of the separation pipe. The air inlet pipe is fixedly connected to the exhaust pipe of the electric proportional valve. The air inlet pipe of the electric proportional valve is fixedly connected to the exhaust end of the air compressor storage tank. An upper flange plate and an upper magnet are fixedly installed on the other side of the separation pipe. There are multiple collection bags. Each collection bag is fixedly sealed with a fixing pipe, a lower flange plate, and a lower magnet at the upper end. One of the collection bags is attracted and installed at the lower end of the other side of the separation pipe. The gear control circuit and the material level monitoring circuit are installed in the component box. The signal output terminal of the gear control circuit and the signal input terminal of the electric proportional valve are connected by wires.

2. The novel PP material dust removal and sorting device according to claim 1, characterized in that, The solenoid valve is a normally closed solenoid valve with a spool.

3. The novel PP material dust removal and sorting device according to claim 1, characterized in that, The bottom two sides of the screening cylinder are higher, while the middle is lower.

4. The novel PP material dust removal and sorting device according to claim 1, characterized in that, The upper magnet has opposite polarities at its lower end and the lower magnet has an upper end with a sealing ring fixedly installed at its lower end. The upper and lower magnets have the same outer diameter.

5. The novel PP material dust removal and sorting device according to claim 1, characterized in that, The material level monitoring circuit includes a photoelectric detection switch and an indicator light connected by wires. The photoelectric detection switch is fixedly and sealed in the second opening on one side of the outer end of the screening cylinder. The power output terminal of the photoelectric detection switch and the power input terminal of the indicator light are connected by wires.

6. The novel PP material dust removal and sorting device according to claim 1, characterized in that, The gear control circuit includes a wireless receiver circuit module, resistors, adjustable resistors, and indicator lights connected by wires. The three power output terminals of the wireless receiver circuit module are connected to one end of each of the three adjustable resistors and the positive power input terminals of the three indicator lights, respectively. The other end of each of the three adjustable resistors is connected to one end of each of the three resistors, respectively. The negative power input terminal of the wireless receiver circuit module is connected to the other end of each of the three resistors and the negative power input terminal of the three indicator lights.

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