A plastic powder separating device

Abstract

The utility model discloses a kind of plastic powder separation devices, first filter assembly and upper feeding device are arranged in the upper connecting port of cyclone material tank with feed pipe and tank bottom discharge port fixed on rack;The upper end of the discharging pipe in the separation outer bin is connected with the tank bottom discharge port after passing through the upper through-hole arranged on the top of the separation outer bin on rack, and the lower end of the discharging pipe is flared mouth;The discharge outlet of the separation outer bin bottom is connected with discharge hopper;The separation inner bin in the separation outer bin is fixed on the separation outer bin or discharge hopper by supporting assembly, and the conical top surface between the separation inner bin top and flared mouth forms material dispersion passage;Light impurity ascending passage is formed between discharging pipe and separation outer bin, and light impurity suction device is arranged at the light impurity outlet of separation outer bin.The above device is used for light impurity separation operation on plastic chips after cleaning and drying, to improve the comprehensive performance of recycled plastic.

Description

Technical Field

[0001] This utility model relates to the field of waste plastic recycling technology, and in particular to a plastic powder separation device. Background Technology

[0002] Waste plastic recycling is an important component of the circular economy. Its core value lies in transforming waste plastics into high-value-added products through technological means, reducing dependence on virgin resources, and simultaneously reducing environmental pollution. With continuous social development and technological advancements, waste plastic recycling technologies are constantly improving, enabling most plastic products to be reused after recycling and processing.

[0003] The recycling and processing of waste plastics into usable plastic fragments involves multiple steps, including sorting, crushing, washing, dehydration, drying, and bagging. Among these steps, washing and drying are the final stages of recycling, after which the plastic fragments can be directly bagged. However, for hard plastic recycling, factors such as the efficiency of powder separation after crushing, the aging degree of the waste plastic, collisions and friction between the plastic fragments and equipment during processing, and the label removal effect of the label remover all contribute to the presence of dust, powder particles, and lightweight films such as labels in the washed and dried plastic fragments. The presence of these lightweight impurities degrades the performance of the recycled plastic, affects its lifespan, and reduces its utilization value. Therefore, it is necessary to separate these lightweight impurities from the washed and dried plastic fragments; however, such equipment has not yet been developed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a plastic powder separation device that can remove light impurities such as dust, powder particles, and light films from cleaned and dried plastic fragments.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a plastic powder separation device includes: a frame; a cyclone material tank is fixedly installed on the frame, and a feed pipe communicating with the inner cavity of the cyclone material tank is installed at the upper part of the cyclone material tank; an upper connection port communicating with the inner cavity of the cyclone material tank is opened at the top of the cyclone material tank, a first filter assembly is installed inside the cyclone material tank at the upper connection port, and an upper feeding device for drawing material into the cyclone material tank from the feed pipe is installed outside the cyclone material tank at the upper connection port.

[0006] For ease of description, the cleaned and dried plastic fragments containing light impurities are referred to as materials. The materials are drawn into the cyclone tank through the feed pipe by the upper feeding device. The relatively heavy materials fall downwards, while the relatively light materials that can pass through the filter holes on the first filter assembly are output through the upper connection port.

[0007] A separation outer chamber is fixedly installed on the frame. An upper through hole communicating with the inner cavity of the separation outer chamber is opened at the top of the separation outer chamber. A bottom discharge port communicating with the inner cavity of the cyclone material tank is opened at the bottom of the cyclone material tank. The discharge pipe is located in the inner cavity of the separation outer chamber, and the upper end of the discharge pipe passes through the upper through hole and connects to the bottom discharge port of the cyclone material tank. The lower end of the discharge pipe is a flared mouth with the diameter gradually increasing from top to bottom. An outer chamber outlet communicating with the inner cavity of the outer chamber is provided at the bottom of the outer chamber, and a discharge hopper is connected to the outer chamber outlet. The inner separation chamber is fixed to the outer separation chamber or the discharge hopper by a support assembly, and the inner separation chamber is located inside the cavity of the outer separation chamber; the top of the inner separation chamber is a conical top surface, the conical top surface is coaxial with the flared mouth, and the gap between the conical top surface and the conical inner wall of the flared mouth forms a material dispersion channel; The gap between the outer wall of the feed pipe and the inner wall of the separation chamber forms a light impurity rising channel. A light impurity outlet communicating with the light impurity rising channel is provided at the upper part of the separation chamber. A light impurity suction device is provided outside the separation chamber at the light impurity outlet to allow light impurities to pass through the material dispersion channel, the light impurity rising channel, and the light impurity outlet for output.

[0008] The material falling downwards from the cyclone tank is evenly dispersed around the conical top surface and slides down through the material dispersion channel. During the slide, plastic fragments in the material fall downwards through the gap between the outer wall of the inner separation chamber and the inner wall of the outer separation chamber into the discharge hopper. Meanwhile, light impurities in the material are discharged through the light impurity rising channel and light impurity outlet by the light impurity suction device.

[0009] In practical applications, the flow rate of the material in the material dispersion channel needs to be adjusted for different plastic fragments and different working conditions in order to achieve the optimal separation efficiency between light impurities and plastic fragments.

[0010] This solution provides three adjustable structures for the flow cross-section of the material dispersion channel.

[0011] The first type of adjustment structure is as follows: the discharge port at the bottom of the cyclone tank has a downwardly extending lower extension pipe, which extends into the discharge pipe from the upper end of the discharge pipe. A first connecting flange is provided on the feed pipe extending out of the separation chamber, and a second connecting flange is provided on the separation chamber. After adjusting the feed pipe to the required height, the first connecting flange and the second connecting flange are connected and fixed by a number of first bolt fastening components.

[0012] During the height adjustment of the feed pipe, the lower extension pipe is always located inside the feed pipe. The gap between the lower extension pipe and the feed pipe is only required to ensure that the feed pipe can be smoothly adjusted in height. Therefore, this gap can be sealed, such as by using a sealing ring, or it can be left unsealed. The impact on the separation efficiency of the equipment is very small and can be ignored.

[0013] The second type of adjustment structure is as follows: the outer compartment outlet of the separation outer compartment extends into the discharge hopper from the top through hole of the discharge hopper; The separation inner chamber is fixed to the discharge hopper by a support assembly; A third connecting flange is provided at the lower part of the outer separation chamber, and a fourth connecting flange is provided at the upper part of the discharge hopper. After adjusting the discharge hopper to the required height, the positions of the third connecting flange and the fourth connecting flange are fixed by a number of second bolt fastening components.

[0014] During the height adjustment of the discharge hopper, the discharge port of the outer compartment of the separation chamber is always located inside the discharge hopper. Ideally, the discharge hopper has an inner sidewall that matches the outer sidewall profile of the discharge port of the outer compartment of the separation chamber. In this case, the gap between the two is very small, and it is only necessary to ensure that the discharge hopper can be smoothly adjusted in height. Therefore, this gap can also be sealed. If a sealing ring is used, it can be ignored without sealing, as it has a very small impact on the separation efficiency of the equipment and can be completely disregarded.

[0015] The third type of adjustment structure is: the outer compartment is fixed to the frame in a detachable connection manner, so that the height of the outer compartment on the frame is adjustable; A first connecting flange is provided on the discharge pipe extending out of the separation chamber, and a second connecting flange is provided on the separation chamber. After adjusting the separation chamber to the required height, the first connecting flange and the second connecting flange are connected and fixed by a number of first bolt fastening components.

[0016] Furthermore, in the aforementioned plastic powder separation device, the outer separation chamber is composed of a first cylindrical section, a conical section, and a second cylindrical section from top to bottom; the inner diameter of the first cylindrical section is smaller than the inner diameter of the second cylindrical section. The inner wall of the conical section and the outer wall of the flared mouth form a first channel; the inner wall of the first cylindrical section and the outer wall of the feed pipe above the flared mouth form a second channel; the first channel and the second channel form a complete channel for the rising of light impurities.

[0017] Furthermore, in the aforementioned plastic powder separation device, the upper feeding device includes: a first negative pressure fan and a first dust removal device; the upper connection port is sequentially connected to the first negative pressure fan and the first dust removal device located outside the cyclone tank; The light impurity suction device includes: a second negative pressure fan and an impurity collection hopper; the light impurity outlet is connected in sequence to the inlet of the second negative pressure fan and the impurity collection hopper via a second pipeline located outside the separation outer chamber; A connecting through hole communicating with the inner cavity of the impurity collection hopper is provided at the top of the impurity collection hopper. A second filter assembly is provided inside the impurity collection hopper at the connecting through hole. The connecting through hole is sequentially connected to a third negative pressure fan and a second dust removal device located outside the impurity collection hopper.

[0018] Furthermore, in the aforementioned plastic powder separation device, both the first filter component and the second filter component are filter screen cylinders.

[0019] Furthermore, in the aforementioned plastic powder separation device, the second negative pressure fan is a variable frequency negative pressure fan; the inlet of the impurity collection hopper is located in the tangential direction of the impurity collection hopper.

[0020] Furthermore, in the aforementioned plastic powder separation device, the feed pipe is located tangentially to the cyclone hopper.

[0021] Furthermore, in the aforementioned plastic powder separation device, the cyclone tank is composed of an upper cylindrical body and a conical cylinder whose outer diameter gradually decreases from top to bottom, or the cyclone tank is composed of an upper cylindrical body, a conical cylinder whose outer diameter gradually decreases from top to bottom, and a lower connecting cylindrical body, from top to bottom. The feed pipe consists of, from top to bottom, a cylindrical upper connecting section, a conical guide section with an outer diameter that gradually decreases from top to bottom, a cylindrical middle connecting section, and a bell mouth.

[0022] The beneficial effects of this utility model are: ① The above-mentioned plastic powder separation device is used to remove light impurities such as dust, powder particles, and light films from cleaned and dried plastic fragments. The content of light impurities in the plastic fragments after processing by the plastic powder separation device is less than 0.1%, which greatly improves the comprehensive performance of recycled plastics. In addition, it can effectively collect light impurities such as powder, reduce air pollution, and improve the working environment; ② The above-mentioned plastic powder separation device is used for hard plastic recycling. The flow cross-section of the material dispersion channel is designed to be adjustable. It can comprehensively consider various factors such as different types of plastic fragments and different working conditions on site, and optimize the flow cross-section to the optimal size, thereby further improving the plastic powder separation efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a plastic powder separation device according to the present invention (the diagram shows the arrow markings indicating the material movement path).

[0024] Figure 2 This is a schematic diagram of the structure of a plastic powder separation device according to the present invention (the diagram shows the airflow paths of the first negative pressure fan, the second negative pressure fan, and the third negative pressure fan).

[0025] Figure 3 This is a schematic diagram of the cyclone material tank.

[0026] Figure 4 This is a schematic diagram of the feed pipe structure.

[0027] Figure 5 yes Figure 3 A top-down view showing the positions of the cyclone hopper and the feed pipe.

[0028] Figure 6 This is a schematic diagram of the separate outer compartment.

[0029] Figure 7 This is a schematic diagram of the structure separating the inner chamber and the discharge hopper.

[0030] Figure 8 This is a schematic diagram of the first type of adjustable flow cross-section of the material dispersion channel.

[0031] Figure 9 Compared to Figure 8 A schematic diagram of the structure after the cross-sectional area of ​​the material dispersion channel is increased by adjustment.

[0032] Figure 10 This is a schematic diagram of the second type of adjustable flow cross-section of the material dispersion channel.

[0033] Figure 11 Compared to Figure 10 A schematic diagram of the structure after the cross-sectional area of ​​the material dispersion channel is increased by adjustment.

[0034] Figure 12 This is a schematic diagram of the third type of adjustable flow cross-section of the material dispersion channel.

[0035] Figure 13 Compared to Figure 12 A schematic diagram of the structure after the cross-sectional area of ​​the material dispersion channel is increased by adjustment.

[0036] in: 1. Rack; 2. Cyclone material tank; 201. Upper cylindrical body; 202. Conical cylinder; 203. Lower connecting cylindrical body; 21. Feed pipe; 22. Upper connection port; 23. Bottom discharge port; 31. First negative pressure fan; 32. First dust removal device; 4. First filter component; 5. Feed pipe; 51. Cylindrical upper connecting section; 52. Conical guide section; 53. Cylindrical middle connecting section; 54. Flared mouth; 55. First connecting flange; 6. Separate outer bin; 61. Upper through hole; 62. Outer bin discharge port; 63. Light impurity outlet; 64. Second connecting flange; 65. Third connecting flange; 7. Discharge hopper; 71. Discharge pipe; 72. Fourth connecting flange; 73. Guide surface; 8. Separate inner compartment; 81. Support components; 82. Conical top surface; 9. Second pipeline; 91. Second negative pressure fan; 92. Impurity collection hopper; 93. Connecting through hole; 94. Second filter assembly; 95. Third negative pressure fan; 96. Second dust removal device; 100. Material dispersion channel; 200. First channel; 300. Second channel; 400. Circular material falling channel; Detailed Implementation

[0037] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0038] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure. Example 1

[0039] like Figure 1 , Figure 2 and Figure 3 As shown in this embodiment, a plastic powder separation device includes: a frame 1, a cyclone tank 2 fixedly mounted on the frame 1, a feed pipe 21 communicating with the inner cavity of the cyclone tank 2 at the upper part of the cyclone tank 2; an upper connection port 22 communicating with the inner cavity of the cyclone tank 2 is opened at the top of the cyclone tank 2, a first filter assembly 4 is provided inside the cyclone tank 2 at the upper connection port 22, and an upper feeding device is provided outside the cyclone tank 2 at the upper connection port 22 to draw material into the cyclone tank 2 through the feed pipe 21.

[0040] In this embodiment, the upper feeding device includes a first negative pressure fan 31 and a first dust removal device 32; the upper connection port 22 is sequentially connected to the first negative pressure fan 31 and the first dust removal device 32 located outside the cyclone tank 2.

[0041] The first filter component 4 is preferably a filter screen cylinder.

[0042] For ease of description, the cleaned and dried plastic fragments containing light impurities are referred to as "materials." After being drawn into the cyclone tank 2 through the feed pipe 21 by the upper feeding device, the relatively heavier materials fall downwards, while the relatively lighter materials that can pass through the filter holes on the first filter assembly 4 are output through the upper connection port 22. Figure 1 and Figure 2 The arrows indicate the direction. Furthermore, relatively light particles that cannot pass through the filter holes on the first filter assembly 4 are blocked by the first filter assembly 4 and are output from the upper connection port 22 after failing to pass through the filter holes on the first filter assembly 4.

[0043] A more preferred embodiment is that the feed pipe 21 is positioned tangentially to the cyclone tank 2, such as... Figure 5 As shown, the tangential feeding method ensures that when the first negative pressure fan 31 is started, the material is drawn into the cyclone tank 2 through the feed pipe 21 and moves downward in a vortex-like motion. This downward vortex-like motion of the material facilitates the separation of plastic fragments from mixed lightweight impurities. The airflow generated by the first negative pressure fan 31 then passes through the first filter assembly 4, blocking lightweight impurities larger than the filter screen's pores. Lightweight impurities smaller than the filter screen's pores, which are primarily dust or fine powder particles, pass through the filter screen's pores and enter the first dust removal device 32 for dust removal. The first dust removal device 32 can be a dust collector bag.

[0044] The cyclone material tank 2 can have the following structure: from top to bottom, it consists of an upper cylindrical body 201 and a conical cylinder 202 whose outer diameter gradually decreases from top to bottom. Considering that a discharge pipe 5 needs to be connected and installed later, to facilitate the installation of the discharge pipe 5, as follows... Figure 3 As shown, a lower connecting cylindrical body 203 can be added to the cyclone material tank 2 with the above structure. That is, the cyclone material tank 2 is composed of an upper cylindrical body 201, a conical cylinder 202 with an outer diameter that gradually decreases from top to bottom, and a lower connecting cylindrical body 203 from top to bottom.

[0045] like Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, a separation outer chamber 6 is fixedly installed on the frame 1, and an upper through hole 61 communicating with the inner cavity of the separation outer chamber 6 is opened at the top of the separation outer chamber 6; a bottom discharge port 23 communicating with the inner cavity of the cyclone material tank 2 is opened at the bottom of the cyclone material tank 2.

[0046] When the cyclone tank 2 is composed of an upper cylindrical body 201 and a conical cylinder 202, the open bottom of the conical cylinder 202 is the bottom discharge port 23. When the cyclone tank 2 is composed of an upper cylindrical body 201, a conical cylinder 202, and a lower connecting cylindrical body 203, the open bottom of the lower connecting cylindrical body 203 is the bottom discharge port 23.

[0047] The feed pipe 5 is located in the inner cavity of the outer separation chamber 6, and the upper end of the feed pipe 5 passes through the upper through hole 61 and is connected to the bottom outlet 23 of the cyclone material tank 2. The lower end of the feed pipe 5 is a flared mouth 54 with the diameter gradually increasing from top to bottom.

[0048] A better option is: such as Figure 4 As shown, the feed pipe 5 is composed of a cylindrical upper connecting section 51, a conical guide section 52 with an outer diameter that gradually decreases from top to bottom, a cylindrical middle connecting section 53, and a bell mouth 54 from top to bottom.

[0049] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, an outer chamber outlet 62 communicating with the inner cavity of the outer chamber 6 is provided at the bottom of the outer chamber 6. A discharge hopper 7 is connected to the outer chamber outlet 62. A discharge pipe 71 communicating with the inner cavity of the discharge hopper 7 is provided at the bottom of the discharge hopper 7.

[0050] The inner separation chamber 8 is fixed to the outer separation chamber 6 or the discharge hopper 7 by a support assembly 81, and the inner separation chamber 8 is located within the inner cavity of the outer separation chamber 6. The top of the inner separation chamber 8 is a conical top surface 82, which is coaxial with the flared opening 54, and the gap between the conical top surface 82 and the conical inner wall of the flared opening 54 forms a material dispersion channel 100. The gap between the outer side wall of the inner separation chamber 8 and the inner side wall of the outer separation chamber 6 forms an annular material falling channel 400, such as... Figure 10 As shown.

[0051] The gap between the outer wall of the feed pipe 5 and the inner wall of the separation outer chamber 6 forms a light impurity rising channel. A light impurity outlet 63 communicating with the light impurity rising channel is provided at the upper part of the separation outer chamber 6. A light impurity suction device is provided outside the separation outer chamber 6 at the light impurity outlet 63 to allow light impurities to be output through the material dispersion channel 100, the light impurity rising channel, and the light impurity outlet 63.

[0052] In this embodiment, as Figure 1 and Figure 2 As shown, the light impurity suction device includes: a second negative pressure fan 91 and an impurity collection hopper 92; the light impurity outlet 63 is connected to the inlet of the second negative pressure fan 91 and the impurity collection hopper 92 in sequence through a second pipeline 9 located outside the separation outer chamber 6.

[0053] A more preferred embodiment is that the second negative pressure fan 91 is preferably a variable frequency negative pressure fan, which adjusts the negative pressure suction force to attract light impurities by frequency conversion.

[0054] A better option is, such as Figure 6 and Figure 10 As shown, the outer separation chamber 6 is composed of a first cylindrical section 601, a conical section 602, and a second cylindrical section 603 from top to bottom; the inner diameter of the first cylindrical section 601 is smaller than the inner diameter of the second cylindrical section 603. The inner wall of the conical section 602 and the outer wall of the flared opening 54 form a first channel 200; the inner wall of the first cylindrical section 601 and the outer wall of the feed pipe 5 above the flared opening 54 form a second channel 300; the first channel 200 and the second channel 300 constitute a complete channel for the upward movement of light impurities.

[0055] The material undergoes initial dust removal in the cyclone tank 2 via the first negative pressure fan 31 and the first dust removal device. After the initial dust removal, the material flows downward into the material dispersion channel 100. During this process, the material is evenly dispersed in all directions via the conical top surface 82 and slides downward. As it slides downward, plastic fragments in the material fall downward through the gap between the outer wall of the inner separation chamber 8 and the inner wall of the outer separation chamber 6, i.e., the annular material falling channel 400, into the discharge hopper 7. Meanwhile, light impurities in the material are discharged through the light impurity rising channel and the light impurity outlet 63 by the light impurity suction device. The light impurities discharged from the light impurity outlet 63 enter the impurity collection hopper 92 through the second pipeline 9.

[0056] In this embodiment, as Figure 1 As shown, a connecting through hole 93 communicating with the inner cavity of the impurity collection hopper 92 is provided at the top of the impurity collection hopper 92. A second filter assembly 94 is provided inside the impurity collection hopper 92 at the connecting through hole 93. The connecting through hole 93 is connected in sequence to a third negative pressure fan 95 and a second dust removal device 96 located outside the impurity collection hopper 92.

[0057] The second filter component 94 is preferably a filter screen cylinder.

[0058] A more preferred embodiment is that the inlet of the impurity collection hopper 92 is located tangentially to the impurity collection hopper 92. This tangential feeding method ensures that when the third negative pressure fan 95 is activated, the light impurities drawn into the light impurity collection hopper 92 are drawn in through the inlet and move downwards in a vortex-like motion. This downward vortex-like motion of the light impurities facilitates the separation of the membrane from dust and powder particles. The airflow generated by the third negative pressure fan 95 then passes through the second filter assembly 94, blocking light impurities larger than the filter screen's pores. Light impurities smaller than the filter screen's pores, which are primarily dust or fine powder particles, pass through the filter screen's pores and enter the second dust removal device 96 for dust removal. The second dust removal device 96 can be a dust collector bag.

[0059] The aforementioned plastic powder separation device is used to remove light impurities such as dust, powder particles, and light films from cleaned and dried plastic fragments. The content of light impurities in the plastic fragments after processing by the plastic powder separation device is less than 0.1%, which greatly improves the overall performance of recycled plastics. In addition, it can effectively collect light impurities such as powder, reduce air pollution, and improve the working environment. Example 2

[0060] In order to improve the separation efficiency of lightweight impurities and plastic fragments, in addition to the use of frequency conversion for the second negative pressure fan 91, this embodiment, based on the first embodiment, designs the flow cross section of the material dispersion channel 100 to be adjustable, that is, the size of the flow cross section is adjustable.

[0061] This embodiment provides the first adjustable structure form for the flow cross section of the material dispersion channel 100.

[0062] The first type of adjustment structure is to design the feed pipe 5 as a structure that can be adjusted up and down, so as to adjust the flow cross section of the material dispersion channel 100 by changing the height of the feed pipe 5.

[0063] At this point, the outer separation chamber 6 and the discharge hopper 7 are fixedly connected, which can be achieved by bolts or welding. The outer separation chamber 6 and the frame 1 are also fixedly connected, which can be either detachable or welded. The discharge hopper 7 and the outer separation chamber 6 are also fixedly connected, which can be either detachable or welded.

[0064] The specific adjustment structure is as follows: Figure 8 and Figure 9As shown, the bottom outlet of the cyclone tank 2 extends downward to form a lower extension pipe, which extends into the feed pipe from the upper end of the feed pipe 5. When the cyclone tank 2 is composed of an upper cylindrical body 201, a conical cylinder 202 with an outer diameter that gradually decreases from top to bottom, and a lower connecting cylindrical body 203, the lower connecting cylindrical body 203 is the aforementioned lower extension pipe.

[0065] A first connecting flange 55 is provided on the discharge pipe 5 extending out of the separation outer chamber 6, and a second connecting flange 64 is provided on the separation outer chamber. After adjusting the discharge pipe 5 to the required height, the relative positions of the first connecting flange 55 and the second connecting flange 64 are fixed by a number of first bolt fastening components.

[0066] When there is a gap between the first connecting flange 55 and the second connecting flange 64, the fixing method can be achieved by adding a number of gaskets or shims between the first connecting flange 55 and the second connecting flange 64, and combining them with multiple first bolt fastening components.

[0067] Alternatively, the threaded holes on the first connecting flange 55 and the threaded holes on the second connecting flange 64 can be rotated in opposite directions. In this way, when the bolts in the first bolt fastening assembly rotate, the first connecting flange 55 and the second connecting flange 64 will either move closer or further apart, and their movements will be opposite.

[0068] Of course, it is possible to make the bolt in the first bolt fastening assembly only able to rotate in the open hole in the first connecting flange 55 and not be able to move up and down. For example, by using the collar and groove fit, the bolt in the first bolt fastening assembly can rotate in the threaded hole of the second connecting flange 64, which can also achieve the adjustment of the distance between the first connecting flange 55 and the second connecting flange 64.

[0069] When it is necessary to adjust the flow cross-section of the material dispersion channel 100, if it is necessary to increase the flow cross-section of the material dispersion channel 100, loosen each of the first bolt fastening assemblies, pull the feed pipe 5 upward, so that the feed pipe 5 moves upward to the required position, and then tighten each of the first bolt fastening assemblies to lock the position of the feed pipe 5. At this time, the gap H1 between the first connecting flange 55 and the second connecting flange 64 is increased compared to before adjustment. At this time, the flow cross-section of the first channel 200 between the inner wall of the conical cylinder section 602 and the outer wall of the bell mouth 54 is decreased.

[0070] Conversely, if it is necessary to reduce the flow cross-section of the material dispersion channel 100, loosen the first bolt fastening assemblies, pull down the feed pipe 5 to move the feed pipe 5 downward to the desired position, and then tighten the first bolt fastening assemblies to lock the position of the feed pipe 5. At this time, the gap H1 between the first connecting flange 55 and the second connecting flange 64 is reduced compared to before adjustment. At this time, the flow cross-section of the first channel 200 between the inner wall of the conical cylinder section 602 and the outer wall of the bell mouth 54 is increased.

[0071] In this regulating structure, when the flow cross-section of the material dispersion channel 100 increases, the flow cross-section of the first channel 200 decreases; when the flow cross-section of the material dispersion channel 100 decreases, the flow cross-section of the first channel 200 increases.

[0072] The aforementioned plastic powder separation device is used for the recycling of hard plastics. The flow cross-section of the material dispersion channel is designed to be adjustable, which can comprehensively consider various factors such as different types of plastic fragments and different working conditions to optimize the flow cross-section to the optimal size, thereby further improving the plastic powder separation efficiency. Example 3

[0073] In order to improve the separation efficiency of lightweight impurities and plastic fragments, in addition to the use of frequency conversion for the second negative pressure fan 91, this embodiment, based on the first embodiment, designs the flow cross section of the material dispersion channel 100 to be adjustable, that is, the size of the flow cross section is adjustable.

[0074] This embodiment provides a second adjustable structure for the flow cross-section of the material dispersion channel 100.

[0075] The second type of adjustment structure is to design the discharge hopper 7 as a structure that can be adjusted up and down. The separation inner chamber 8 is fixed to the discharge hopper 7 by the support component 81. Therefore, when the discharge hopper 7 is adjustable up and down, the separation inner chamber 8 fixedly connected to it can be adjusted up and down synchronously, which can change the flow cross section of the material dispersion channel 100.

[0076] At this time, the feeding pipe 5 and the cyclone hopper 2 are fixedly connected, which can be connected by bolts or by welding. The separation outer chamber 6 and the frame 1 are also fixedly connected, which can be detachable or welded.

[0077] The specific structure is as follows: Figure 10 and Figure 11 As shown, the bottom outlet 23 of the cyclone material tank 2 is fixedly connected to the upper end of the discharge pipe 5. The two can be fixed by bolts or by welding.

[0078] The discharge port of the outer compartment 6 extends into the discharge hopper 7 through the top through hole. A guide surface 73 corresponding to the contour of the lower outer wall of the outer compartment 6 can be provided on the top of the inner side wall of the discharge hopper 7. A third connecting flange 65 is provided at the lower part of the outer compartment 6, and a fourth connecting flange 72 is provided at the upper part of the discharge hopper 7. After adjusting the discharge hopper 7 to the required height, the positions of the third connecting flange 65 and the fourth connecting flange 72 are fixed by a number of second bolt fastening components.

[0079] When it is necessary to adjust the flow cross-section of the material dispersion channel 100, if it is necessary to increase the flow cross-section of the material dispersion channel 100, loosen the second bolt fastening components, pull down the discharge hopper 7 to move the discharge hopper 7 downward to the desired position, and then tighten the second bolt fastening components to lock the position of the discharge hopper 7. At this time, the gap H2 between the third connecting flange 65 and the fourth connecting flange 72 is larger than before adjustment.

[0080] Conversely, if it is necessary to reduce the flow cross-section of the material dispersion channel 100, loosen the second bolt fastening components, pull the discharge hopper 7 upward to move it to the desired position, and then tighten the second bolt fastening components to lock the position of the discharge hopper 7. At this time, the gap H2 between the third connecting flange 65 and the fourth connecting flange 72 is smaller than before adjustment.

[0081] In this type of adjustment structure, regardless of whether the cross-sectional area of ​​the material dispersion channel 100 increases or decreases, the cross-sectional area of ​​the first channel 200 remains constant.

[0082] The aforementioned plastic powder separation device is used for the recycling of hard plastics. The flow cross-section of the material dispersion channel is designed to be adjustable, which can comprehensively consider various factors such as different types of plastic fragments and different working conditions to optimize the flow cross-section to the optimal size, thereby further improving the plastic powder separation efficiency. Example 4

[0083] In order to improve the separation efficiency of lightweight impurities and plastic fragments, in addition to the use of frequency conversion for the second negative pressure fan 91, this embodiment, based on the first embodiment, designs the flow cross section of the material dispersion channel 100 to be adjustable, that is, the size of the flow cross section is adjustable.

[0084] This embodiment presents a third type of adjustable structure for the flow cross-section of the material dispersion channel 100.

[0085] The third type of adjustment structure involves designing the outer separation chamber 6 as a height-adjustable structure. The inner separation chamber 8 can be fixed to the discharge hopper 7 via a support assembly 81, or it can be fixed to the outer separation chamber 6 via the support assembly 81. There are several ways to design the outer separation chamber 6 for height adjustment. For example, connecting parts with oblong grooves can be installed on both sides of the outer separation chamber 6. The oblong grooves, in conjunction with bolts, allow for adjustment of the vertical position of the outer separation chamber 6. Alternatively, the outer separation chamber 6 can be mounted on the frame 1 using an eccentric wheel structure. Changing the rotation angle of the eccentric wheel in the eccentric wheel structure changes the vertical height of the outer separation chamber 6.

[0086] At this time, the feed pipe 5 and the cyclone hopper 2 are fixedly connected, which can be done by bolts or by welding. The outer separation chamber 6 and the feed hopper 7 are also fixedly connected, which can be done by bolts or by welding.

[0087] The specific structure is as follows: Figure 12 and Figure 13 As shown, a first connecting flange 55 is provided on the discharge pipe 5 extending out of the separation outer chamber 6, and a second connecting flange 64 is provided on the separation outer chamber 6. After adjusting the separation outer chamber 6 to the required height, the positions of the first connecting flange 55 and the second connecting flange 64 are fixed by a number of first bolt fastening components.

[0088] Among them, the cyclone material tank 2, the feeding pipe 5, the outer separation chamber 6, the inner separation chamber 8, the feeding hopper 7, and the second pipeline 9 are all made of metal materials. When the position of the outer separation chamber 6 changes, in order to match the change in the height of the outer separation chamber 6, the second pipeline 9 between the light impurity outlet 63 and the second negative pressure fan 91 is designed as a corrugated pipe structure or partially as a corrugated pipe structure.

[0089] When it is necessary to adjust the flow cross-section of the material dispersion channel 100, if it is necessary to increase the flow cross-section of the material dispersion channel 100, then loosen the fixing structure between the outer separation chamber 6 and the frame 1, loosen each of the first bolt fastening assemblies, and pull the outer separation chamber 6 downwards to move it to the desired position. At this time, the conical top surface 82 on the inner separation chamber 6 moves downwards away from the inner wall of the flared mouth 54. Then tighten each of the first bolt fastening assemblies to lock the position between the outer separation chamber 6 and the discharge pipe 5, and then fix the outer separation chamber 6 to the frame 1. At this time, the gap H1 between the first connecting flange 55 and the second connecting flange 64 is larger than before adjustment.

[0090] Conversely, if it is necessary to reduce the flow cross-section of the material dispersion channel 100, the fixing structure between the outer separation chamber 6 and the frame 1 should be loosened, and the first bolt fastening assemblies should be loosened. The outer separation chamber 6 should be pulled upwards to move to the desired position. At this time, the conical top surface 82 on the inner separation chamber 6 should move upwards and approach the inner wall of the flared mouth 54. Then, the first bolt fastening assemblies should be tightened to lock the position between the outer separation chamber 6 and the discharge pipe 5, and then the outer separation chamber 6 should be fixed to the frame 1. At this time, the gap H1 between the first connecting flange 55 and the second connecting flange 64 is smaller than before adjustment.

[0091] In this regulating structure, when the flow cross-section of the material dispersion channel 100 increases, the flow cross-section of the first channel 200 decreases; when the flow cross-section of the material dispersion channel 100 decreases, the flow cross-section of the first channel 200 increases.

[0092] The aforementioned plastic powder separation device is used for the recycling of hard plastics. The flow cross-section of the material dispersion channel is designed to be adjustable, which can comprehensively consider various factors such as different types of plastic fragments and different working conditions to optimize the flow cross-section to the optimal size, thereby further improving the plastic powder separation efficiency.

[0093] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A plastic powder separation device, comprising: A frame; characterized in that: a cyclone material tank is fixedly installed on the frame, a feed pipe communicating with the inner cavity of the cyclone material tank is installed at the upper part of the cyclone material tank; an upper connection port communicating with the inner cavity of the cyclone material tank is opened at the top of the cyclone material tank, a first filter assembly is installed inside the cyclone material tank at the upper connection port, and an upper feeding device for drawing material into the cyclone material tank from the feed pipe is installed outside the cyclone material tank at the upper connection port; A separation outer chamber is fixedly installed on the frame. An upper through hole communicating with the inner cavity of the separation outer chamber is opened at the top of the separation outer chamber. A bottom discharge port communicating with the inner cavity of the cyclone material tank is opened at the bottom of the cyclone material tank. The discharge pipe is located in the inner cavity of the separation outer chamber, and the upper end of the discharge pipe passes through the upper through hole and connects to the bottom discharge port of the cyclone material tank. The lower end of the discharge pipe is a flared mouth with the diameter gradually increasing from top to bottom. An outer chamber outlet communicating with the inner cavity of the outer chamber is provided at the bottom of the outer chamber, and a discharge hopper is connected to the outer chamber outlet. The inner separation chamber is fixed to the outer separation chamber or the discharge hopper by a support assembly, and the inner separation chamber is located inside the cavity of the outer separation chamber; the top of the inner separation chamber is a conical top surface, the conical top surface is coaxial with the flared mouth, and the gap between the conical top surface and the conical inner wall of the flared mouth forms a material dispersion channel; The gap between the outer wall of the feed pipe and the inner wall of the separation chamber forms a light impurity rising channel. A light impurity outlet communicating with the light impurity rising channel is provided at the upper part of the separation chamber. A light impurity suction device is provided outside the separation chamber at the light impurity outlet to allow light impurities to pass through the material dispersion channel, the light impurity rising channel, and the light impurity outlet for output.

2. The plastic powder separation device according to claim 1, characterized in that: The cross-section of the material dispersion channel is adjustable. The adjustment structure is as follows: the bottom outlet of the cyclone tank has a downwardly extending lower extension pipe, which extends into the feed pipe from the upper end of the feed pipe. A first connecting flange is provided on the feed pipe extending out of the separation chamber, and a second connecting flange is provided on the separation chamber. After adjusting the feed pipe to the required height, the first connecting flange and the second connecting flange are connected and fixed by a number of first bolt fastening components.

3. The plastic powder separation device according to claim 1, characterized in that: The flow cross section of the material dispersion channel is adjustable. The adjustment structure is as follows: the discharge port of the outer compartment of the separation outer compartment extends into the discharge hopper from the top through hole of the discharge hopper. The separation inner chamber is fixed to the discharge hopper by a support assembly; A third connecting flange is provided at the lower part of the outer separation chamber, and a fourth connecting flange is provided at the upper part of the discharge hopper. After adjusting the discharge hopper to the required height, the positions of the third connecting flange and the fourth connecting flange are fixed by a number of second bolt fastening components.

4. The plastic powder separation device according to claim 1, characterized in that: The flow cross section of the material dispersion channel is adjustable. The adjustment structure is as follows: the outer separation chamber is fixed to the frame in a detachable connection manner, so that the height of the outer separation chamber on the frame is adjustable. A first connecting flange is provided on the discharge pipe extending out of the separation chamber, and a second connecting flange is provided on the separation chamber. After adjusting the separation chamber to the required height, the first connecting flange and the second connecting flange are connected and fixed by a number of first bolt fastening components.

5. A plastic powder separation device according to claim 1, 2, 3, or 4, characterized in that: The outer separation chamber is composed of a first cylindrical section, a conical section, and a second cylindrical section from top to bottom; the inner diameter of the first cylindrical section is smaller than the inner diameter of the second cylindrical section. The inner wall of the conical section and the outer wall of the flared mouth form a first channel; the inner wall of the first cylindrical section and the outer wall of the feed pipe above the flared mouth form a second channel; the first channel and the second channel form a complete channel for the rising of light impurities.

6. A plastic powder separation device according to claim 1, 2, 3, or 4, characterized in that: The upper feeding device includes: a first negative pressure fan and a first dust removal device; the upper connection port is sequentially connected to the first negative pressure fan and the first dust removal device located outside the cyclone tank; The light impurity suction device includes: a second negative pressure fan and an impurity collection hopper; the light impurity outlet is connected in sequence to the inlet of the second negative pressure fan and the impurity collection hopper via a second pipeline located outside the separation outer chamber; A connecting through hole communicating with the inner cavity of the impurity collection hopper is provided at the top of the impurity collection hopper. A second filter assembly is provided inside the impurity collection hopper at the connecting through hole. The connecting through hole is sequentially connected to a third negative pressure fan and a second dust removal device located outside the impurity collection hopper.

7. A plastic powder separation device according to claim 6, characterized in that: Both the first and second filter components are filter cylinders.

8. A plastic powder separation device according to claim 7, characterized in that: The second negative pressure fan is a variable frequency negative pressure fan; The inlet of the impurity collection hopper is located tangentially to the impurity collection hopper.

9. A plastic powder separation device according to claim 1, 2, 3, or 4, characterized in that: The feed pipe is located tangentially to the cyclone tank.

10. A plastic powder separation device according to claim 1, characterized in that: The cyclone material tank is composed of an upper cylindrical body and a conical cylinder whose outer diameter gradually decreases from top to bottom, or the cyclone material tank is composed of an upper cylindrical body, a conical cylinder whose outer diameter gradually decreases from top to bottom, and a lower connecting cylindrical body, from top to bottom. The feed pipe consists of, from top to bottom, a cylindrical upper connecting section, a conical guide section with an outer diameter that gradually decreases from top to bottom, a cylindrical middle connecting section, and a bell mouth.

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