Molding powder separation equipment with multi-stage filtering function

Abstract

The molding powder separation equipment with the multi-stage filtering function comprises a separation bin and a feeding hopper installed at the upper end of the separation bin, a discharging device is arranged at the lower end of the separation bin, a rotary material taking device is rotatably installed through the separation bin, a machine box is arranged at the end, away from the separation bin, of the rotary material taking device, and the machine box is provided with a plurality of filtering devices. A negative pressure fan is installed on the machine box, when the negative pressure fan works, negative pressure is generated in the rotary material taking device, molding powder particles located in the separation bin are adsorbed through the negative pressure, an open groove is formed in the back face of the machine box, and a storage device for storing molding powder slides into the machine box through the open groove. According to the device, screening and winnowing are combined, and molding powder particles can be effectively screened.

Description

Technical Field

[0001] The invention relates to plastic powder separation equipment with multi-stage filtering function. Background Art

[0002] After plastic products are recycled, they are crushed by a pulverizer to obtain plastic powder particles. These plastic powder particles inevitably contain some particles that are too large in size. These coarse particles need to be screened out before subsequent processing.

[0003] In the prior art, the separation of plastic powder particles mainly adopts two methods: air selection and sieving. Air selection is to screen by wind. Plastic powder particles with larger particle size are relatively heavy and therefore cannot be captured by air selection, while particles with smaller particle size can be captured. Sieving is to use a sieve with a fixed mesh size to make the plastic powder particles pass through the sieve by means of vibration of the sieve, so as to achieve the purpose of screening.

[0004] In the above technical solution, the screen screening belongs to passive screening with low screening efficiency, and the screen is always facing one side upwards. After being blocked by coarse particles, it cannot be cleared in time, resulting in lower and lower screening efficiency until manual cleaning is required.

[0005] During air separation, plastic powder particles will clump due to static electricity and other reasons, resulting in the inability to select fine powder particles.

[0006] Based on the above problems, we designed a plastic powder separation equipment with multi-stage filtration function that combines screening and air separation to effectively realize the screening of plastic powder particles. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a plastic powder separation device with a multi-stage filtering function which can effectively realize the screening of plastic powder particles by combining screening and air separation.

[0008] To solve the above problems, the present invention adopts the following technical solutions: A plastic powder separation device with a multi-stage filtering function comprises a separation bin and a feed hopper installed at the upper end of the separation bin, a discharging device is arranged at the lower end of the separation bin, a rotary material taking device is rotatably installed through the separation bin, a chassis is arranged at the end of the rotary material taking device away from the separation bin, a negative pressure fan is installed through the chassis, and when the negative pressure fan is working, negative pressure is generated in the rotary material taking device, and the plastic powder particles in the separation bin are adsorbed by the negative pressure, a slot is arranged on the back side of the chassis, and a storage device for storing plastic powder is slid into through the slot.

[0009] Preferably, the separation bin includes a cylindrical bin body, an end cover is provided at one end of the bin body, the bin body includes a small diameter part and a large diameter part, a connecting pipe is provided on the top of the small diameter part, and the feed hopper is connected to the connecting pipe, an axis tube is provided at the axis center of the end of the bin body away from the end cover, the rotary material taking device is inserted into the bin body through the axis tube, and the discharging device is installed at the bottom of the large diameter part.

[0010] Preferably, the discharging device includes a discharging pipe, which is welded to the bottom of the large diameter part and connected to the inner cavity of the warehouse body. An electric push rod is installed at the bottom of the discharging pipe, and a sliding rod is connected to the telescopic end of the electric push rod. The sliding rod slides along the axis of the discharging pipe. A discharging port is arranged at the upper position of the outer wall of the discharging pipe, and a sliding block is arranged at the upper end of the sliding block. The sliding block fits the inner wall of the discharging rod, and an arc-shaped fitting groove is processed on the top of the sliding block. When the electric push rod is pushed up to the limit position, the outer wall of the sliding block closes the discharging port, and at the same time, the fitting groove transitions to the inner wall of the warehouse body in an arc shape; at the outer wall of the discharging pipe, a discharging guide plate is arranged corresponding to the lower part of the discharging port.

[0011] Preferably, the rotary feeding device includes a feeding pipe and a rotary motor, one end of the feeding pipe is inserted into the warehouse body, and the other end is inserted into the chassis, the feeding pipe is rotatably connected to the warehouse body and the chassis respectively, the rotation is supported by bearings, a shaft seal is installed at the gap position to prevent air leakage, the end of the feeding pipe inserted into the warehouse body is closed, and a plurality of negative pressure feeding units are arranged in a ring on the outer wall of the feeding pipe, and the negative pressure feeding unit corresponds to the large diameter part, and an intermittent feeding unit is also installed on the outer wall of the feeding pipe, the intermittent feeding unit is located at the small diameter part and cooperates with the feed hopper; a transmission unit is cooperated between the rotary motor and the feeding pipe, and the transmission unit is a belt transmission unit.

[0012] Preferably, the negative pressure material taking unit includes a blade plate, a screen is arranged inside the blade plate, the end of the blade plate is connected to the material taking pipe, the screen is facing the rotation direction of the blade plate, and as the blade plate rotates, the plastic powder particles located at the large diameter part are scooped into the screen, and the fine particles are actively adsorbed through the screen under the action of negative pressure, while the coarse particles are intercepted; a rubber scraper is arranged on the outer end surface of the blade plate, and the thickness of the rubber scraper gradually decreases in the direction away from the blade plate, and the end of the rubber scraper acts on the inner wall of the large diameter part.

[0013] Preferably, the intermittent feeding unit includes an annular plate, which is gap-matched with the inner wall of the small diameter portion, and the gap is less than 0.2 mm; a plurality of drop holes are arranged in a ring on the plate surface of the annular plate, and under normal conditions, the annular plate closes the bottom of the connecting tube, and when the drop holes correspond to the connecting tube, the plastic powder particles in the connecting tube fall into the bin body, and a connecting plate is welded between the annular plate and the feeding tube.

[0014] Preferably, an installation groove is provided at the upper end of the chassis, and an equipment box is movably and detachably arranged in the installation groove, the negative pressure fan is installed in the chassis, and the negative pressure fan is connected with an air inlet pipe and an air outlet pipe, the air inlet pipe is inserted from the front end of the equipment box and is directly opposite to the feeding pipe, and the air outlet pipe passes through the equipment box upward, and a filter cup is provided on the inner wall of the air inlet pipe, and a part of the feeding pipe is inserted into the filter cup. When the negative pressure fan is working, negative pressure suction is generated in the feeding pipe after passing through the filter cup, and the plastic powder particles are adsorbed to pass through the feeding pipe and enter the chassis, and then stored downward in the storage device.

[0015] Preferably, the filter cup is conical, and its diameter gradually increases toward the direction of the material collection tube. A plurality of bracket bodies are arranged in a ring at the end position of the outer wall of the material collection tube. An inclined surface is arranged on the outer side of the bracket body, and the inclined surface is parallel to the inner conical surface of the filter cup. Bristles are placed on the inclined surface, and the bristles act on the inner wall surface of the filter cup.

[0016] Preferably, the storage device includes a lower box body and an upper box body, and there is more than one upper box body, which overlaps on the top of the lower box body, and a vibration motor is provided at the outer end surface of the upper box body. A screen is provided at the bottom of the upper box body, and the upper box body slides into the slot and fits into the inner wall of the chassis, so that the negative pressure of the negative pressure fan when working can effectively act on the material taking pipe, and right-angle grooves are provided on both sides of the bottom of the lower box body, and rollers are installed in the right-angle grooves; a protruding part is provided at the bottom of the upper box body, and the protruding part fits into the inner wall of the lower box body.

[0017] Preferably, a light-transmitting plate is provided at the end surface of the end cover.

[0018] The beneficial effects of the present invention are: The device stirs the plastic powder particles that fall into the bin body through the rotation of the rotary feeding device. During the rotation, the active movement of the screen will scoop up the plastic powder particles, so that the plastic powder particles are received on the surface of the screen. As the rotary feeding device continues to rotate, the plastic powder particles screened by the screen enter the feeding pipe and are discharged after being adsorbed by negative pressure. At the same time, the negative pressure suction force generated by the negative pressure fan will also actively capture plastic powder particles with qualified particle size through the screen, thereby improving the screening efficiency.

[0019] After screening, the plastic powder particles sucked by the negative pressure suction of the negative pressure fan fall into the storage device. The storage device can vibrate independently and perform secondary screening through its matching screen to complete the further subdivision of the plastic powder particles.

[0020] The device has a simple structure, low cost and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A perspective view of the present invention; Figure 2 A schematic diagram of the slide-out storage device; Figure 3 It is a partial schematic diagram of the device; Figure 4 is a cross-sectional view of the discharging device; Figure 5 It is a structural schematic diagram of the rotary material taking device; Figure 6 It is a three-dimensional diagram of the negative pressure material taking unit; Figure 7 It is a cross-sectional view of the negative pressure material taking unit; Figure 8 for Figure 7 A magnified view at point A; Fig. 9 This is a schematic diagram of the coordination between the chassis and the material taking pipe; Fig.10 This is a schematic diagram of the coordination between the material taking pipe and the filter cup; Fig.11 is a three-dimensional diagram of a storage device; Fig.12 It is a partial cross-sectional view of the upper box. DETAILED DESCRIPTION

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0024] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0025] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, in the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "disposed", "socketed", "connected", "through", "plugged" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1 , Figure 2 and Figure 3 A plastic powder separation device with a multi-stage filtering function is shown, comprising a separation bin 1, and a feed hopper 2 installed at the upper end of the separation bin 1, a discharging device 3 is provided at the lower end of the separation bin 1, a rotary material taking device 4 is rotatably installed through the separation bin 1, a chassis 5 is provided at the end of the rotary material taking device 4 away from the separation bin 1, a negative pressure fan is installed through the chassis 5, when the negative pressure fan is working, negative pressure is generated in the rotary material taking device 4, and the plastic powder particles in the separation bin 1 are adsorbed by the negative pressure, a groove is provided on the back of the chassis 5, and a storage device 7 for storing plastic powder is slid into through the groove.

[0029] In the above technical scheme, the plastic powder particles to be screened enter through the feed hopper 2, and the plastic powder particles enter the separation bin 1 for preliminary separation. The coarse particles are intercepted and discharged through the discharging device 3, while the fine particles are air-selected and screened through the rotary material taking device 4, and then transported to the chassis 5, and then screened for the second time through the storage device 7, completing the multi-stage screening of the plastic powder.

[0030] The advantages of the above screening method are: The plastic powder particles are stirred by the rotary material taking device 4, so that the plastic powder particles with the particle size meeting the standard can be effectively selected, and the stirring action can disperse the agglomerated plastic powder particles, which helps to screen out the particles that meet the standard.

[0031] See also Figure 2 and Figure 3 As shown, the separation bin 1 includes a cylindrical bin body 101, an end cover 102 is provided at one end of the bin body 101, the bin body 101 includes a small diameter portion 111 and a large diameter portion 112, a connecting pipe 103 is provided on the top of the small diameter portion 111, and the feed hopper 2 is connected to the connecting pipe 103, an axle tube 104 is provided at the axis of the end of the bin body 101 away from the end cover 102, the rotary material taking device 4 is inserted into the bin body 101 via the axle tube 104, and the discharging device 3 is installed at the bottom of the large diameter portion 112.

[0032] See also Figure 3 and Figure 4 As shown, the discharging device 3 includes a discharging pipe 301, which is welded to the bottom of the large diameter portion 112 and communicated with the inner cavity of the bin body 101. An electric push rod 302 is installed at the bottom of the discharging pipe 301. A sliding rod 303 is connected to the telescopic end of the electric push rod 302. The sliding rod 303 slides along the axis of the discharging pipe 301. A discharging port 304 is provided at the upper position of the outer wall of the discharging pipe 301. The sliding rod 303 A slider 305 is provided at the upper end, and the slider 305 fits with the inner wall of the discharge rod 301. An arc-shaped fitting groove 306 is processed on the top of the slider 305. When the electric push rod 302 is pushed up to the limit position, the outer wall of the slider 305 closes the discharge port 304. At the same time, the fitting groove 306 transitions to the inner wall of the warehouse body 301 in an arc shape; at the outer wall of the discharge pipe 301, a discharge guide plate 307 is provided corresponding to the lower part of the discharge port 304.

[0033] In the above technical solution, the rotary material taking device 4 needs to keep the electric push rod 302 moving upward during the rotation. After the rotation action of the rotary material taking device 4 is completed, the intercepted coarse plastic powder particles need to be discharged. At this time, the electric push rod 302 retracts, causing the slider 305 to descend until the mating groove 306 is exposed at the discharge port 304. The plastic powder particles are discharged along the discharge port 304 to complete the discharge of the coarse particles.

[0034] See also Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the rotary feeding device 4 includes a feeding pipe 401 and a rotary motor 402, one end of the feeding pipe 401 is inserted into the warehouse body 101, and the other end is inserted into the chassis 5, the feeding pipe 401 is rotatably connected to the warehouse body 101 and the chassis 5 respectively, and the rotation is supported by a bearing, and a shaft seal is installed at the gap position to avoid air leakage, and the end of the feeding pipe 401 inserted into the warehouse body 101 is closed, and a plurality of negative pressure feeding units 403 are annularly arranged on the outer wall of the feeding pipe 401, and the negative pressure feeding units 403 correspond to the large diameter part 112, and an intermittent feeding unit 404 is also installed on the outer wall of the feeding pipe 401, and the intermittent feeding unit 404 is located at the small diameter part 111 and cooperates with the feed hopper 2; a transmission unit 405 is cooperated between the rotary motor 402 and the feeding pipe 401, and the transmission unit 405 is a belt transmission unit.

[0035] In the above technical solution, the material taking pipe 401 rotates, driving the intermittent feeding unit 404 to rotate, and intermittent feeding is achieved through the intermittent feeding unit 404, avoiding the blockage caused by feeding too much at one time.

[0036] The material taking pipe 401 rotates, driving the negative pressure material taking unit 403 to stir the plastic powder particles entering into the bin body 101, completing the screening and air separation of the plastic powder particles, and realizing the extraction of fine plastic powder particles.

[0037] See also Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the negative pressure material taking unit 403 includes a blade plate 441, a screen 442 is arranged inside the blade plate 441, the end of the blade plate 441 is connected to the material taking tube 401, and the screen 442 faces the rotation direction of the blade plate 441. As the blade plate 441 rotates, the plastic powder particles located at the large diameter part 112 are scooped onto the screen 442, and the fine particles are actively adsorbed through the screen 442 under the action of negative pressure, while the coarse particles are intercepted; a rubber scraper 443 is arranged on the outer end face of the blade plate 441, and the thickness of the rubber scraper 443 gradually decreases in the direction away from the blade plate 441, and the end of the rubber scraper 443 acts on the inner wall of the large diameter part 112.

[0038] In the above technical solution, by rotating the feeding tube 401, the fan blade 441 rotates to scoop up the plastic powder particles. The plastic powder particles pass through the screen 442 and fall into the inner side of the feeding tube 401. They are sucked into the storage device 7 through negative pressure, thereby completing the separation of the fine plastic powder particles.

[0039] As the screen 442 continues to rotate, when the screen 442 rotates downward, the coarse particles of powder on the surface of the screen 442 that cannot be screened out fall off.

[0040] Since the screen 442 is used for primary screening, the full power operation of the negative pressure fan is maintained, which can improve the suction efficiency while avoiding the wind selection of coarse plastic powder particles. Therefore, this combination of wind selection and screening can greatly improve the screening efficiency.

[0041] See also Figure 5 As shown, the intermittent feeding unit 404 includes an annular plate 444, and the annular plate 444 is gap-matched with the inner wall of the small-diameter portion 111, and the gap is less than 0.2 mm; a plurality of drop holes 445 are arranged in a ring on the plate surface of the annular plate 444, and under normal conditions, the annular plate 444 closes the bottom of the connecting tube 103, and when the drop holes 445 correspond to the connecting tube 103, the plastic powder particles in the connecting tube 103 fall into the bin body 101, and a connecting plate 446 is welded between the annular plate 444 and the feeding tube 401.

[0042] In the above technical solution, the connecting pipe 103 is blocked by the annular plate 444, and the material is discharged only when the discharge hole 445 corresponds to the connecting pipe 103, thereby avoiding the problem of blockage caused by continuous discharge of materials.

[0043] Compared with the traditional technology of setting up an independent feeding device to control the amount of material discharged, this operation method in this case is more energy-saving and has lower costs.

[0044] See also Figure 2 , Fig. 9 and Fig.10 As shown, a mounting groove is provided at the upper end of the chassis 5, and an equipment box 51 is movably and detachably arranged in the mounting groove. The negative pressure fan is installed in the chassis 5, and is connected with an air inlet pipe 61 and an air outlet pipe 62. The air inlet pipe 61 is inserted from the front end of the equipment box 51 and faces the feeding pipe 401, and the air outlet pipe 62 passes through the equipment box 51 upward. A filter cup 63 is provided on the inner wall of the air inlet pipe 61, and a part of the feeding pipe 401 is inserted into the filter cup 63. When the negative pressure fan is working, a negative pressure suction force is generated in the feeding pipe 401 after passing through the filter cup 63, and the plastic powder particles are adsorbed to pass through the feeding pipe 401 and enter the chassis 5, and then stored downward in the storage device 7.

[0045] In the above technical solution, the design of the filter cup 63 prevents ultra-fine powder particles from being sucked into the negative pressure fan.

[0046] See also Fig. 9 and Fig.10As shown, the filter cup 63 is conical, and its diameter gradually increases toward the direction of the material collection tube 401. A plurality of bracket bodies 4441 are arranged in a ring at the end position of the outer wall of the material collection tube 401. An inclined surface 4442 is arranged on the outer side of the bracket body 4441. The inclined surface 4442 is parallel to the inner conical surface of the filter cup 63. Bristles 4443 are placed on the inclined surface 4442, and the bristles 4443 act on the inner wall surface of the filter cup 63.

[0047] In the above technical solution, the rotational movement of the material taking tube 401 can also drive the bristles 4443 to clean the inner wall of the filter cup 63 to maintain effective ventilation efficiency.

[0048] See also Fig.11 and Fig.12 As shown, the storage device 7 includes a lower box body 701 and an upper box body 702, and the upper box body 702 is provided with more than one, and the upper box body 702 overlaps the top of the lower box body 701, and a vibration motor 703 is provided at the outer end surface of the upper box body 702, and a screen 704 is provided at the bottom of the upper box body 702. After the upper box body 702 slides into the slot, it fits into the inner wall of the chassis 5, so that the negative pressure when the negative pressure fan is working can effectively act on the material taking pipe 401, and right-angle grooves are provided on both sides of the bottom of the lower box body 702, and rollers 705 are installed in the right-angle grooves; the bottom of the upper box body 702 is provided with a protruding part 771, and the protruding part 771 fits into the inner wall of the lower box body 701.

[0049] In the above technical solution, secondary screening can be achieved by overlapping the lower box 701 and the upper box 702, and the secondary screening adopts vibration screening.

[0050] See also Figure 3 As shown, a light-transmitting plate 122 is provided at the end surface of the end cover 102 .

[0051] The light-transmitting plate 122 can be used to observe whether there is material blockage in the warehouse body 101.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plastic powder separation device with multi-stage filtering function, characterized in that: The invention comprises a separation bin (1), and a feeding hopper (2) installed at the upper end of the separation bin (1); a discharging device (3) is arranged at the lower end of the separation bin (1); a rotary material taking device (4) is rotatably installed through the separation bin (1); a machine box (5) is arranged at the end of the rotary material taking device (4) away from the separation bin (1); a negative pressure fan is installed through the machine box (5); when the negative pressure fan is working, negative pressure is generated in the rotary material taking device (4), and plastic powder particles in the separation bin (1) are adsorbed by the negative pressure; a slot is arranged on the back of the machine box (5), and a storage device (7) for storing plastic powder is slid into the slot.

2. The plastic powder separation equipment with multi-stage filtering function according to claim 1 is characterized in that: The separation bin (1) comprises a cylindrical bin body (101), one end of which is provided with an end cover (102), the bin body (101) comprising a small diameter portion (111) and a large diameter portion (112), a connecting pipe (103) being provided at the top of the small diameter portion (111), and being connected to the feed hopper (2) via the connecting pipe (103), an axle tube (104) being provided at the axis of the end of the bin body (101) away from the end cover (102), the rotary material taking device (4) being inserted into the bin body (101) via the axle tube (104), and the discharging device (3) being installed at the bottom of the large diameter portion (112).

3. The plastic powder separation equipment with multi-stage filtering function according to claim 2 is characterized in that: The discharging device (3) comprises a discharging pipe (301), the discharging pipe (301) is welded to the bottom of the large diameter part (112) and is in communication with the inner cavity of the bin body (101), an electric push rod (302) is installed at the bottom of the discharging pipe (301), a sliding rod (303) is connected to the telescopic end of the electric push rod (302), the sliding rod (303) slides along the axis of the discharging pipe (301), a discharging port (304) is arranged at the upper position of the outer wall of the discharging pipe (301), and the sliding rod (303) is A slider (305) is provided at the upper end, and the slider (305) fits the inner wall of the discharge rod (301). An arc-shaped fitting groove (306) is processed on the top of the slider (305). When the electric push rod (302) is pushed up to the limit position, the outer wall of the slider (305) closes the discharge port (304). At the same time, the fitting groove (306) and the inner wall of the bin body (301) transition in an arc shape. A discharge guide plate (307) is provided at the outer wall of the discharge pipe (301) corresponding to the lower part of the discharge port (304).

4. The plastic powder separation equipment with multi-stage filtering function according to claim 3 is characterized in that: The rotary material taking device (4) comprises a material taking pipe (401) and a rotary motor (402); one end of the material taking pipe (401) is inserted into the silo (101), and the other end is inserted into the chassis (5); the material taking pipe (401) is rotatably connected to the silo (101) and the chassis (5), respectively; the rotation is supported by a bearing; a shaft seal is installed at the gap position to prevent air leakage; the end of the material taking pipe (401) inserted into the silo (101) is sealed; the outer wall of the material taking pipe (401) A plurality of negative pressure material taking units (403) are arranged in an annular shape, and the negative pressure material taking units (403) correspond to the large diameter portion (112). An intermittent feeding unit (404) is also installed on the outer wall of the material taking pipe (401), and the intermittent feeding unit (404) is located at the small diameter portion (111) and cooperates with the feed hopper (2). A transmission unit (405) is cooperated between the rotary motor (402) and the material taking pipe (401), and the transmission unit (405) is a belt transmission unit.

5. The plastic powder separation equipment with multi-stage filtering function according to claim 4 is characterized in that: The negative pressure material taking unit (403) comprises a blade plate (441), a screen (442) is arranged inside the blade plate (441), the end of the blade plate (441) is connected to the material taking pipe (401), and the screen (442) faces the rotation direction of the blade plate (441). As the blade plate (441) rotates, the plastic powder particles located at the large diameter part (112) are scooped onto the screen (442), and the fine particles are actively adsorbed through the screen (442) under the action of negative pressure, while the coarse particles are intercepted; a rubber scraper (443) is arranged at the outer end surface of the blade plate (441), and the thickness of the rubber scraper (443) gradually decreases in the direction away from the blade plate (441), and the end of the rubber scraper (443) acts on the inner wall of the large diameter part (112).

6. The plastic powder separation equipment with multi-stage filtering function according to claim 4 is characterized in that: The intermittent feeding unit (404) comprises an annular plate (444), wherein the annular plate (444) is gap-matched with the inner wall of the small-diameter portion (111), and the gap is less than 0.2 mm; a plurality of drop holes (445) are arranged in a ring shape on the plate surface of the annular plate (444); under normal conditions, the annular plate (444) closes the bottom of the connecting tube (103); when the drop holes (445) correspond to the connecting tube (103), the plastic powder particles in the connecting tube (103) fall into the bin body (101); and a connecting plate (446) is welded between the annular plate (444) and the feeding tube (401).

7. The plastic powder separation equipment with multi-stage filtering function according to claim 4 is characterized in that: The upper end of the chassis (5) is provided with a mounting groove, in which a device box (51) is movably and detachably mounted, the negative pressure fan is mounted in the chassis (5), and is connected to an air inlet pipe (61) and an air outlet pipe (62), the air inlet pipe (61) penetrates from the front end of the device box (51) and faces the material taking pipe (401), the air outlet pipe (62) penetrates upwards out of the device box (51), a filter cup (63) is provided on the inner wall of the air inlet pipe (61), a part of the material taking pipe (401) is inserted into the filter cup (63), when the negative pressure fan is working, negative pressure suction is generated in the material taking pipe (401) after passing through the filter cup (63), the plastic powder particles are absorbed to pass through the material taking pipe (401), and enter the chassis (5), and then are stored downwards in the storage device (7).

8. The plastic powder separation equipment with multi-stage filtering function according to claim 7 is characterized in that: The filter cup (63) is conical, and its diameter gradually increases towards the direction of the material extraction tube (401). A plurality of support bodies (4441) are arranged in a ring shape at the end position of the outer wall of the material extraction tube (401). An inclined surface (4442) is arranged on the outer side of the support body (4441). The inclined surface (4442) is parallel to the inner conical surface of the filter cup (63). Bristles (4443) are placed on the inclined surface (4442). The bristles (4443) act on the inner wall surface of the filter cup (63).

9. The plastic powder separation equipment with multi-stage filtering function according to claim 7, characterized in that: The storage device (7) comprises a lower box body (701) and an upper box body (702), wherein at least one upper box body (702) is provided, the upper box body (702) overlaps the top of the lower box body (701), a vibration motor (703) is provided at the outer end surface of the upper box body (702), a screen (704) is provided at the bottom of the upper box body (702), and the upper box body (702) slides into the slot and fits into the inner wall of the chassis (5), so that the negative pressure when the negative pressure fan is working can effectively act on the material taking pipe (401), right-angle grooves are provided on both sides of the bottom of the lower box body (702), and rollers (705) are installed in the right-angle grooves; a protruding portion (771) is provided at the bottom of the upper box body (702), and the protruding portion (771) fits into the inner wall of the lower box body (701).

10. The plastic powder separation equipment with multi-stage filtering function according to claim 2, characterized in that: A light-transmitting plate (122) is provided at the end surface of the end cover (102).

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