Melting device for waste plastic recovery

Abstract

The utility model discloses a melting device for waste plastic recovery, which relates to the technical field of plastic recovery and comprises a shell, an insulating layer and an inner container are sequentially mounted on the inner wall of the shell, an electric heating tube is mounted at a gap between the inner container and the insulating layer, and a stirring component is arranged in the inner container. An auxiliary heat conduction pipe extending into the inner container is fixed to the middle of the inner wall of the top of the shell, multiple rows of special-shaped pipes distributed at equal intervals are installed on the outer wall of the auxiliary heat conduction pipe, heat conduction openings distributed at equal intervals are formed in the outer wall, close to the top, of the auxiliary heat conduction pipe, and the heat conduction openings communicate with the gap between the inner container and the heat preservation layer. Waste plastic is driven to be stirred up and down and annularly stirred in the whole device, so that the waste plastic can be uniformly heated, the gap between the inner container and the heat preservation layer and the interiors of the auxiliary heat conduction pipe and the special-shaped pipe can be heated at the same time, and the inner and outer double-layer heating effect is achieved; and the working speed of the whole device is fully improved.

Description

Technical Field

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

[0002] Waste plastic recycling refers to the process of transforming discarded plastic products into reusable plastic raw materials or products through a series of processing steps. Waste plastic recycling not only reduces environmental pollution from plastic waste but also conserves resources and reduces energy consumption. The main methods of waste plastic recycling include physical recycling and chemical recycling. Chemical recycling refers to converting waste plastics into chemical raw materials or fuels through processes such as melting, gasification, and hydrolysis.

[0003] Currently, when recycling waste plastics through chemical melting, a melting device is required. Existing melting devices use electric heating tubes installed inside the device housing to heat the inside of the housing and melt the plastic. However, during the heating process, the heat cannot be fully transferred to the inside of the plastic, especially the plastic in the middle area, which cannot be heated quickly, thus affecting the working speed of the entire device. Therefore, it is urgent to design an air compressor structure that reduces the displacement of automobiles to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a melting device for recycling waste plastics. Its advantages lie in the phenomenon of the waste plastic being stirred up and down and in a ring within the entire device, ensuring uniform heating of the waste plastic inside the melting device and creating a double-layer heating effect, thus significantly improving the overall operating speed of the device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A melting device for recycling waste plastics includes an outer shell, an insulation layer and an inner liner sequentially installed on the inner wall of the outer shell, an electric heating tube installed in the gap between the inner liner and the insulation layer, an agitation assembly installed inside the inner liner, an auxiliary heat-conducting pipe extending into the inner liner fixed at the middle of the top inner wall of the outer shell, and multiple rows of equally spaced irregularly shaped tubes installed on the outer wall of the auxiliary heat-conducting pipe, heat-conducting ports equally spaced on the outer wall near the top of the auxiliary heat-conducting pipe, the heat-conducting ports communicating with the gap between the inner liner and the insulation layer, and a discharge pipe extending to the bottom of the outer shell fixed at the middle of the bottom of the inner liner, with a filter cylinder fixed at the bottom of the discharge pipe.

[0007] The above technical solutions create a double-layer heating effect, allowing the plastic in the middle area to be heated quickly, thus significantly improving the overall operating speed of the device.

[0008] The present invention is further configured such that a feed hopper and an exhaust pipe extending to the outside of the outer shell are respectively fixed on both sides of the top corner of the inner liner, and a sealing cover is provided on the top of the feed hopper, and a support frame is fixedly installed on the bottom of the outer shell.

[0009] The above technical solutions facilitate material discharge and exhaust gas removal.

[0010] The present invention is further configured such that the agitation component includes mounting holes equally spaced on the top of the outer shell, and the inner walls of the mounting holes are rotatably connected to agitation shafts inserted into the inner liner. The top of the insulation layer and the top of the inner liner are both provided with through holes equally spaced for the agitation shafts to pass through. The outer walls of the agitation shafts are all fixedly mounted with spiral agitation blades, and the outer walls of the agitation shafts are also fixed with multiple rows of agitation plates equally spaced. The top ends of the agitation shafts are all fixedly mounted with gears, and the top of the outer shell is fixedly mounted with a protective cover covering the gears. A motor is fixedly mounted at the top center of the protective cover, and a gear ring is fixedly mounted on the output shaft of the motor, the gear ring meshing with the gear.

[0011] The above technical solutions induce the waste plastic to undergo up-and-down and ring-shaped agitation within the entire device, thereby accelerating the melting rate.

[0012] The present invention is further configured such that the irregular tube is composed of two connecting tubes and an arc-shaped tube fixed between the two connecting tubes, and one of the connecting tubes is connected to the auxiliary heat-conducting tube, the other end of the other connecting tube is designed to be solid, and the stirring shaft passes through the middle position of the arc-shaped tube.

[0013] The above technical solutions facilitate the rotation of the agitator shaft.

[0014] The present invention is further configured such that a groove is provided on one side of the filter cylinder, and an electric push rod is fixedly installed on the inner wall of the groove. A lifting rod inserted into the filter cylinder is fixedly installed on the piston end of the electric push rod, and a sealing plug that fits against the inner wall of the feed pipe is fixedly installed on the top end of the lifting rod.

[0015] The above technical solutions facilitate the unblocking of the feeding pipe and make material discharge easier.

[0016] The present invention is further configured such that a waste discharge pipe is fixed to one side of the bottom of the filter cylinder and a discharge funnel is fixed to the middle of the bottom of the filter cylinder, and a filter assembly is provided on the top of the discharge funnel.

[0017] The present invention is further configured such that the filter assembly includes a filter screen fixedly installed on the top of the discharge funnel, and a connecting plate is fixed to the bottom of the stirring shaft. One end of the connecting plate is fixed with a connecting shaft passing through the center of the discharge pipe. A sealing plug is sleeved on the outside of the connecting shaft, and a cleaning scraper is fixed at equal intervals to the top surface of the filter screen at the bottom of the connecting shaft.

[0018] The above technical solutions facilitate the filtration of molten plastic, remove unmelted impurities mixed in with the molten plastic, and clean the filter screen, thus avoiding the problem of molten plastic and unmelted impurities being discharged simultaneously due to filter screen blockage.

[0019] The present invention is further configured such that the top outer wall and bottom outer wall of the inner liner are respectively fixedly installed with equally spaced mounting seats to the top inner wall and bottom inner wall of the outer shell, and the top and bottom of the insulation layer are provided with mounting openings through which the mounting seats pass. The bottom inner wall of the inner liner is fixed with an annular inclined seat, and the bottom inner wall of the filter cylinder is fixed with a waste discharge inclined seat to the outer wall of the discharge funnel.

[0020] The above technical solutions enable materials to fall quickly and be discharged rapidly.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. This melting device for waste plastic recycling, through its outer shell, insulation layer, electric heating tube, inner liner and stirring component, enables the waste plastic to be stirred up and down and in a ring shape inside the device under the action of the spiral stirring blades and stirring plates of the stirring component. This allows the waste plastic to be heated evenly inside the melting device, thereby increasing the melting rate of the entire device.

[0023] 2. This melting device for recycling waste plastics, through the installation of electric heat collection tubes, auxiliary heat conduction tubes, shaped tubes, and heat conduction ports, enables simultaneous heating of the gap between the inner liner and the insulation layer, as well as the interior of the auxiliary heat conduction tubes and shaped tubes, during the heating process. This allows heat to be transferred along the auxiliary heat conduction tubes and shaped tubes to the inner wall of the waste plastic, forming a double-layer heating effect. This allows the plastic in the middle area to be heated quickly, significantly improving the working speed of the entire device.

[0024] 3. This melting device for waste plastic recycling, through its feeding pipe, filter cylinder, electric push rod, lifting rod, sealing plug, discharge funnel, and filter assembly, allows for the adjustment of the lifting rod height via the electric push rod during discharge. This enables the sealing plug to slide inside the feeding pipe and on the surface of the connecting shaft, disengaging it from the feeding pipe. The molten plastic then falls along the feeding pipe onto the filter screen, effectively filtering the molten plastic and removing unmelted impurities. Furthermore, the agitation assembly rotates the connecting plate, connecting shaft, and cleaning scraper, cleaning the filter screen and preventing clogging that could cause molten plastic and unmelted impurities to be discharged simultaneously. Attached Figure Description

[0025] Figure 1This is a perspective view of a melting device for recycling waste plastics according to the present invention;

[0026] Figure 2 This is a perspective sectional view of a melting device for recycling waste plastics according to the present invention.

[0027] Figure 3 This is a schematic diagram of the irregularly shaped tube and heat-conducting port structure of a melting device for waste plastic recycling proposed in this utility model;

[0028] Figure 4 This is a side cross-sectional view of a melting device for recycling waste plastics proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the connecting plate and sealing plug structure of a melting device for waste plastic recycling proposed in this utility model;

[0030] Figure 6 This is a schematic diagram of the feeding pipe and mounting base structure of a melting device for recycling waste plastics proposed in this utility model.

[0031] In the diagram: 1. Outer shell; 2. Support frame; 3. Filter cylinder; 4. Electric push rod; 5. Feed hopper; 6. Protective cover; 7. Motor; 8. Exhaust pipe; 9. Insulation layer; 10. Electric heating element; 11. Inner liner; 12. Annular inclined seat; 13. Discharge funnel; 14. Filter screen; 15. Waste discharge inclined seat; 16. Lifting rod; 17. Cleaning scraper; 18. Connecting shaft; 19. Sealing plug; 20. Auxiliary heat conduction pipe; 21. Stirring shaft; 22. Spiral stirring blade; 23. Stirring plate; 24. Gear; 25. Gear ring; 26. Shaped tube; 27. Heat conduction port; 28. Waste discharge pipe; 29. ​​Connecting plate; 30. Feed pipe; 31. Mounting base. Detailed Implementation

[0032] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0033] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0034] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0035] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0036] Reference Figure 1-6 A melting device for recycling waste plastics includes an outer shell 1. An insulation layer 9 and an inner liner 11 are sequentially installed on the inner wall of the outer shell 1. An electric heating tube 10 is installed in the gap between the inner liner 11 and the insulation layer 9. An agitator is installed inside the inner liner 11. A feed hopper 5 extending to the outside of the outer shell 1 and a tail gas exhaust pipe 8 are fixed on both sides of the top corner of the inner liner 1, respectively. A sealing cover is installed on the top of the feed hopper 5. The tail gas exhaust pipe 8 is connected to a tail gas treatment device. A support frame 2 is fixedly installed at the bottom of the outer shell 1. An auxiliary heat-conducting pipe 20 extending into the inner liner 11 is fixed at the middle position of the top inner wall of the outer shell 1. Multiple rows of equally spaced irregularly shaped tubes 26 are installed on the outer wall of the auxiliary heat-conducting pipe 20. The auxiliary heat conduction pipe 20 has heat conduction ports 27 evenly distributed on its outer wall near the top. The heat conduction ports 27 are connected to the gap between the inner liner 11 and the insulation layer 9. The bottom center of the inner liner 11 is fixed with a feed pipe 30 extending to the bottom of the outer shell 1, and the bottom of the feed pipe 30 is fixed with a filter cylinder 3. This allows the gap between the inner liner 11 and the insulation layer 9, as well as the interior of the auxiliary heat conduction pipe 20 and the shaped pipe 26, to be heated simultaneously. This allows heat to be transferred along the surface of the inner liner 11 and the auxiliary heat conduction pipe 20 and the shaped pipe 26 to the outside and inner wall of the waste plastic, forming a double-layer heating effect. This allows the plastic in the middle area to be heated quickly, thus significantly improving the working speed of the entire device.

[0037] Specifically, the agitation assembly includes mounting holes evenly spaced on the top of the outer shell 1, with agitator shafts 21 rotatably connected to the inner walls of each mounting hole and inserted into the inner liner 11. The top of the insulation layer 9 and the top of the inner liner 11 both have through holes evenly spaced for the agitator shafts 21 to pass through. Spiral agitator blades 22 are fixedly mounted on the outer walls of the agitator shafts 21, and multiple rows of evenly spaced agitator plates 23 are also fixedly mounted on the outer walls of the agitator shafts 21. Gears 24 are fixedly mounted at the top of each agitator shaft 21, and a protective cover 6 covering the gears 24 is fixedly mounted on the top of the outer shell 1. A motor 7 is fixedly mounted at the center of the top of the protective cover 6. The output shaft is fixedly mounted with a gear ring 25, which meshes with the gear 24. The shaped tube 26 consists of two connecting tubes and an arc-shaped tube fixed between the two connecting tubes. One of the connecting tubes is connected to the auxiliary heat-conducting tube 20, and the other end of the other connecting tube is designed to be solid. The stirring shaft 21 passes through the middle of the arc-shaped tube. The motor 7 drives the gear ring 25, gear 24, stirring shaft 21, spiral stirring blade 22 and stirring plate 23 to rotate simultaneously. Under the action of the spiral stirring blade 22 and stirring plate 23, the waste plastic is stirred up and down and in a ring inside the whole device, which accelerates the melting rate.

[0038] Specifically, a slot is provided on one side of the filter cylinder 3, and an electric push rod 4 is fixedly installed on the inner wall of the slot. A lifting rod 16 inserted into the filter cylinder 3 is fixedly installed on the piston end of the electric push rod 4. A sealing plug 19 that fits against the inner wall of the feed pipe 30 is fixedly installed on the top of the lifting rod 16. The top surface of the sealing plug 19 is designed to be conical. The height of the lifting rod 16 is adjusted by the electric push rod 4, so that the sealing plug 19 slides inside the feed pipe 30 and on the surface of the connecting shaft 18, so that the sealing plug 19 is disengaged from the feed pipe 30, which facilitates the opening of the feed pipe 30 and facilitates material discharge.

[0039] Specifically, a waste discharge pipe 28 is fixed to one side of the bottom of the filter cylinder 3, and a discharge funnel 13 is fixed to the middle of the bottom of the filter cylinder 3. A filter assembly is provided on the top of the discharge funnel 13. The filter assembly includes a filter screen 14 fixedly installed on the top of the discharge funnel 13, and the filter screen 14 is designed in an umbrella shape. A connecting plate 29 is fixed to the bottom of the stirring shaft 21. A connecting shaft 18 passing through the center of the feed pipe 30 is fixed to one end of the connecting plate 29. A sealing plug 19 is sleeved on the outside of the connecting shaft 18. The bottom of the connecting shaft 18 is fixed with equidistant... The cleaning scraper 17, which is attached to the top surface of the filter screen 14, allows the molten plastic to fall onto the filter screen 14 along the feed pipe 30. This filters the molten plastic, removing unmelted impurities mixed in with it. The molten plastic is then discharged along the discharge funnel 13, while the unmelted impurities are discharged along the waste discharge pipe 28. In conjunction with the agitator, the connecting plate 29, connecting shaft 18, and cleaning scraper 17 rotate, thus cleaning the filter screen 14 and preventing the filter screen 14 from becoming clogged and causing the molten plastic and unmelted impurities to be discharged simultaneously.

[0040] Specifically, the top and bottom outer walls of the inner liner 11 are fixedly installed with equally spaced mounting seats 31 to the top and bottom inner walls of the outer shell 1, respectively. The top and bottom of the insulation layer 9 are provided with mounting openings through which the mounting seats 31 pass. The bottom inner wall of the inner liner 11 is fixed with an annular inclined seat 12. The bottom inner wall of the filter cylinder 3 and the outer wall of the discharge funnel 13 are fixed with a waste discharge inclined seat 15. Through the action of the annular inclined seat 12 and the waste discharge inclined seat 15, the material can fall quickly and be discharged quickly.

[0041] Working Principle: During use, the user places waste plastic into the entire device through the feed hopper 5, activates the electric heating tube 10, so that the gap between the inner liner 11 and the insulation layer 9, as well as the inside of the auxiliary heat conduction tube 20 and the shaped tube 26, can be heated simultaneously. This allows heat to be transferred along the surface of the inner liner 11 and the auxiliary heat conduction tube 20 and the shaped tube 26 to the outside and inner wall of the waste plastic, forming a double-layer heating effect. The user then activates the motor 7 in the stirring assembly, which drives the gear ring 25, gear 24, stirring shaft 21, spiral stirring blades 22, and stirring plate 23 to rotate simultaneously. Under the action of the spiral stirring blades 22 and the stirring plate 23, the waste plastic is stirred and agitated up and down and in a circular motion throughout the entire device. The agitation phenomenon accelerates the melting rate. When discharging, the user adjusts the height of the lifting rod 16 via the electric push rod 4, causing the sealing plug 19 to slide inside the discharge pipe 30 and on the surface of the connecting shaft 18, thus disengaging the sealing plug 19 from the discharge pipe 30. At this time, the discharge pipe 30 is open, allowing the molten plastic to fall onto the filter screen 14 along the discharge pipe 30, filtering the molten plastic and removing unmelted impurities mixed in with the molten plastic. The molten plastic is then discharged along the discharge funnel 13, while the unmelted impurities are discharged along the waste discharge pipe 28. In conjunction with the agitation component, the connecting plate 29, the connecting shaft 18, and the cleaning scraper 17 rotate, which cleans the filter screen 14 and prevents it from clogging.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A melting device for recycling waste plastics, comprising a housing (1), characterized in that, The inner wall of the outer shell (1) is sequentially equipped with a heat insulation layer (9) and an inner liner (11), and an electric heating tube (10) is installed in the gap between the inner liner (11) and the heat insulation layer (9). An agitation component is provided inside the inner liner (11). An auxiliary heat conduction tube (20) extending into the inner liner (11) is fixed at the middle position of the top inner wall of the outer shell (1), and multiple rows of equally spaced irregular tubes (26) are installed on the outer wall of the auxiliary heat conduction tube (20). An equally spaced heat conduction port (27) is opened on the outer wall of the auxiliary heat conduction tube (20) near the top. The heat conduction port (27) is connected to the gap between the inner liner (11) and the heat insulation layer (9). A feed pipe (30) extending to the bottom of the outer shell (1) is fixed at the middle position of the bottom of the inner liner (11), and a filter cylinder (3) is fixed at the bottom of the feed pipe (30).

2. The melting device for waste plastic recycling according to claim 1, characterized in that, The inner liner (11) has a feed hopper (5) and an exhaust pipe (8) extending to the outside of the outer shell (1) respectively fixed on both sides of the top corner. The top of the feed hopper (5) is provided with a sealing cover, and the bottom of the outer shell (1) is fixedly installed with a support frame (2).

3. A melting device for recycling waste plastics according to claim 1, characterized in that, The agitation assembly includes mounting holes equidistantly opened on the top of the outer shell (1), and the inner walls of the mounting holes are rotatably connected to agitation shafts (21) inserted into the inner liner (11). The top of the insulation layer (9) and the top of the inner liner (11) are provided with through holes equidistantly for the agitation shafts (21) to pass through. The outer walls of the agitation shafts (21) are fixedly mounted with spiral agitation blades (22), and the outer walls of the agitation shafts (21) are also fixed with multiple rows of agitation plates (23) equidistantly distributed. The top of the agitation shafts (21) is fixedly mounted with gears (24), and the top of the outer shell (1) is fixedly mounted with a protective cover (6) covering the gears (24). The top middle position of the protective cover (6) is fixedly mounted with a motor (7), and the output shaft of the motor (7) is fixedly mounted with a gear ring (25), which meshes with the gears (24).

4. A melting device for recycling waste plastics according to claim 1, characterized in that, The irregular tube (26) consists of two connecting tubes and an arc-shaped tube fixed between the two connecting tubes. One of the connecting tubes is connected to the auxiliary heat-conducting tube (20), and the other end of the other connecting tube is designed to be solid. The stirring shaft (21) passes through the middle position of the arc-shaped tube.

5. A melting device for recycling waste plastics according to claim 1, characterized in that, A slot is provided on one side of the filter cylinder (3), and an electric push rod (4) is fixedly installed on the inner wall of the slot. A lifting rod (16) inserted into the filter cylinder (3) is fixedly installed on the piston end of the electric push rod (4). A sealing plug (19) that fits against the inner wall of the feed pipe (30) is fixedly installed on the top end of the lifting rod (16).

6. A melting device for recycling waste plastics according to claim 5, characterized in that, A waste discharge pipe (28) is fixed to one side of the bottom of the filter cylinder (3), and a discharge funnel (13) is fixed to the middle of the bottom of the filter cylinder (3). A filter assembly is provided on the top of the discharge funnel (13).

7. A melting device for recycling waste plastics according to claim 6, characterized in that, The filter assembly includes a filter screen (14) fixedly installed on the top of the discharge funnel (13), and a connecting plate (29) is fixed at the bottom of the stirring shaft (21). One end of the connecting plate (29) is fixed with a connecting shaft (18) that passes through the center of the discharge pipe (30). A sealing plug (19) is sleeved on the outside of the connecting shaft (18). A cleaning scraper (17) is fixed at equal distances to the bottom of the connecting shaft (18) and fits against the top surface of the filter screen (14).

8. A melting device for recycling waste plastics according to claim 7, characterized in that, The top and bottom outer walls of the inner liner (11) are fixedly installed with equally spaced mounting seats (31) on the top and bottom inner walls of the outer shell (1), respectively. The top and bottom of the insulation layer (9) are provided with mounting openings through which the mounting seats (31) pass. The bottom inner wall of the inner liner (11) is fixed with an annular inclined seat (12), and the bottom inner wall of the filter cylinder (3) is fixed with a waste discharge inclined seat (15) on the outer wall of the discharge funnel (13).

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