Biodegradable environment-friendly plastic blending processing device

By adopting a funnel-type mixing barrel and spiral blade structure in the blending device, and combining the cutting device to allow different raw materials to enter the mixing barrel at the same time, the problem of raw material layering is solved, and the uniform mixing and efficient production of biodegradable environmentally friendly plastics is achieved.

CN223071703UActive Publication Date: 2025-07-08秦皇岛鸿震新材料科技有限公司
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Patent Information

Application Number
CN202421654590.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-13
Publication Date
2025-07-08
Estimated Expiration
2034-07-13

AI Technical Summary

Technical Problem

The existing blending devices can easily lead to the delamination of raw materials when the order of raw materials falls in different orders, resulting in uneven mixing, which in turn affects product performance.

Method used

A biodegradable environmentally friendly plastic blending processing device is designed, using a funnel-type mixing barrel and spiral blade structure. Combined with the cutting device, different raw materials enter the mixing barrel at the same time from the same pipe, and the up and down turn and radial movement of the raw materials are achieved through the rotation of the spiral blades, avoiding layering and ensuring uniform mixing.

Benefits of technology

The uniform mixing of raw materials is achieved, the uniformity of performance and production efficiency of the product are improved, and the problems of blind spots and uneven mixing are avoided.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of plastic blending processing devices, and provides a biodegradable environment-friendly plastic blending processing device which comprises a mixing barrel, a stirring structure is arranged in the mixing barrel, the mixing barrel is of a funnel-shaped structure, and the stirring structure comprises a first driving motor, a rotating rod and a spiral blade. The first driving motor is located at the upper end of the mixing barrel and fixedly connected with the mixing barrel, one end of the rotating rod is fixedly connected with a rotating shaft of the first driving motor, the rotating rod is fixedly connected with a fixing rod perpendicular to the rotating rod, and the spiral blade is fixedly connected with the rotating rod through the fixing rod; and the upper end of the mixing barrel is provided with a discharging device which is used for enabling different raw materials to enter the mixing barrel from the same pipeline at the same time. By means of the technical scheme, the problem that in the prior art, due to different falling sequences of raw materials, the raw materials are layered, and then partial performance of products is reduced is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of plastic blending processing devices, and specifically, to a biodegradable environmental protection plastic blending processing device. Background Art

[0002] With the continuous improvement of environmental protection awareness and the emphasis on sustainable development, biodegradable environmental protection plastics have received extensive attention and application globally. Biodegradable plastics are plastic materials that can be decomposed into carbon dioxide, water, and organic matter through the action of microorganisms in the natural environment. The use of such materials helps to reduce the long-term pollution of plastic waste to the environment and alleviate the "white pollution" problem.

[0003] In the production process of biodegradable environmental protection plastics, the blending device is one of the key equipment. The blending device is used to mix different types of plastic raw materials in a certain proportion to achieve performance optimization and improvement. Currently, commonly used blending devices include mechanical stirrers, mixers, and high-speed mixers, etc. These devices generate mechanical force and mixing action through rotating blades or other mixing mechanisms to fully mix different plastic raw materials.

[0004] During the use of current blending devices, raw material stratification often occurs due to different falling orders of the raw materials. Specifically, when different types and shapes of raw materials enter the blending device, due to differences in gravity and flow characteristics, stratification may form in the vertical direction. In this way, even if horizontal stirring is carried out in the blending device, it is difficult to completely eliminate the stratification phenomenon of vertical accumulation. This raw material stratification problem will lead to poor uniformity of the mixed raw materials, and further reduce some properties of the product. Summary of the Utility Model

[0005] The utility model provides a biodegradable environmental protection plastic blending processing device, which solves the problem in the related art that raw material stratification is caused by different falling orders of the raw materials, and further reduces some properties of the product.

[0006] The technical solution of the utility model is as follows:

[0007] A biodegradable environmental protection plastic blending and processing device, including a mixing barrel, wherein a stirring structure is arranged inside the mixing barrel, a discharge port is arranged at the lower end of the mixing barrel, a sealing cover is detachably connected inside the discharge port, the mixing barrel is of a funnel-shaped structure, the stirring structure includes a first driving motor, a rotating rod, and a spiral blade, the first driving motor is located at the upper end of the mixing barrel and is fixedly connected to the mixing barrel, one end of the rotating rod is fixedly connected to the rotating shaft of the first driving motor, the rotating rod is fixedly connected with a fixing rod perpendicular to the rotating rod, the spiral blade is fixedly connected to the rotating rod through the fixing rod, the spiral blade extends along the rotating rod from the side of the transmission rod away from the first driving motor towards the first driving motor, and the distance between the spiral blade and the rotating rod increases as the diameter of the mixing barrel increases. A feeding device is arranged at the upper end of the mixing barrel for enabling different raw materials to enter the mixing barrel simultaneously from the same pipeline.

[0008] Further, the feeding device includes a feeding pipe and a plurality of feeding funnels. The feeding pipe is fixedly connected to the upper end of the mixing barrel, one end of the feeding pipe is communicated with the inside of the mixing barrel, a transportation device is fixedly connected to the discharge end of the feeding funnel, and a discharge pipe is arranged between the transportation device and the feeding pipe. Both ends of the discharge pipe are fixedly connected to the transportation device and the feeding pipe respectively and are communicated with the inside of the transportation device and the inside of the feeding pipe.

[0009] Further, the transportation device includes a conveying pipe, a spiral rod, and a second driving motor. The feeding funnel is perpendicular to the conveying pipe and is fixedly connected to the conveying pipe. The discharge end of the feeding funnel is communicated with the conveying pipe. The end of the conveying pipe away from the feeding funnel is fixedly connected to the feeding pipe and is communicated with the feeding pipe. The spiral rod is located inside the conveying pipe. The second driving motor is fixedly connected to the end of the conveying pipe away from the feeding pipe. One end of the spiral rod is fixedly connected to the rotating shaft of the second driving motor, and the end of the spiral rod away from the second driving motor extends towards the end of the conveying pipe away from the second driving motor.

[0010] Further, the conveying pipe is fixedly connected with a support rod, and the support rod extends towards the discharge pipe and is fixedly connected to the discharge pipe.

[0011] Further, a limiting pipe is slidably connected to the end of the feeding pipe away from the mixing barrel. The limiting pipe is located inside the feeding pipe. The outer wall of the limiting pipe abuts against the inner wall of the feeding pipe. A limiting block is fixedly connected to the inner wall of the feeding pipe and extends towards the middle of the feeding pipe. A moving groove is arranged on the side wall of the limiting pipe, and the limiting block is located in the moving groove. The limiting pipe is provided with a plurality of discharge openings having the same diameter as the discharge pipe, and the limiting pipe is provided with a limiting structure for restricting the sliding of the limiting pipe.

[0012] Further, the limiting structure includes a limiting member and a baffle. The limiting member is rotatably connected to the end of the limiting pipe away from the blanking pipe. The end of the limiting member facing the blanking pipe extends towards the blanking pipe. The baffle is fixedly connected to the end of the limiting member facing the blanking pipe. Both ends of the baffle extend towards the inner wall of the limiting pipe, and both ends of the baffle are in contact with the end of the limiting block facing the limiting member.

[0013] The working principle and beneficial effects of the present utility model are as follows:

[0014] In the present utility model, the spiral blade enables the raw materials to move along the spiral direction of the blade, promoting the raw materials to flip up and down and move radially in the barrel, forming a good mixing flow, avoiding dead corners and uneven mixing, so as to achieve uniform mixing. By setting the mixing barrel into a funnel-shaped structure, the diameter of the lower end of the mixing barrel is smaller than that of the upper end, which is conducive to the discharge of the mixed raw materials. By changing the distance between the spiral blade and the rotating rod, the spiral blade can adapt to the geometric changes in the mixing barrel, ensuring that the spiral blades at different heights can fully mix the raw materials at the corresponding heights and avoiding insufficient mixing of the raw materials in the edge area. In the present utility model, different raw materials enter the mixing barrel through the same pipeline at the same time, preventing the raw materials from stratifying when entering the mixing barrel, ensuring that all raw materials can enter the mixing barrel for stirring simultaneously, and improving the mixing uniformity. The present utility model solves the problem in the related art that due to the different falling orders of the raw materials, the raw materials are stratified, resulting in a reduction in some properties of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a right view of the present utility model;

[0018] Figure 3 is Figure 2 a cross-sectional view taken along line A-A of

[0019] Figure 4 is a schematic structural diagram of the blanking structure in Embodiment 1;

[0020] Figure 5 is a top view of the blanking structure in Embodiment 1;

[0021] Figure 6 is Figure 5 a cross-sectional view taken along line B-B of

[0022] Figure 7 is Figure 6 a cross-sectional view taken along line C-C of

[0023] Figure 8 It is a schematic structural diagram of the blanking structure in Embodiment 2;

[0024] Figure 9 It is a top view of the blanking structure in Embodiment 2;

[0025] Figure 10 It is Figure 9 a sectional view taken along line D-D of

[0026] In the figure: 1, mixing barrel; 2, blanking funnel; 3, blanking pipe; 4, limiting pipe; 5, limiting member; 11, first driving motor; 12, rotating rod; 13, fixed rod; 14, spiral blade; 15, discharge port; 16, sealing cover; 21, conveying pipe; 22, screw rod; 23, second driving motor; 24, discharge pipe; 25, support rod; 31, limiting block; 32, support frame; 33, linear motor; 34, push rod; 41, discharge opening; 42, moving groove; 51, baffle. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] As Figures 1 to 7As shown in the figure, this embodiment proposes a biodegradable environmental protection plastic blending and processing device, including a mixing barrel 1. A stirring structure is arranged inside the mixing barrel 1. An outlet 15 is arranged at the lower end of the mixing barrel 1. A sealing cover 16 is detachably connected inside the outlet 15. The mixing barrel 1 is in a funnel-shaped structure. The stirring structure includes a first drive motor 11, a rotating rod 12, and a spiral blade 14. The first drive motor 11 is located at the upper end of the mixing barrel 1 and is fixedly connected to the mixing barrel 1. One end of the rotating rod 12 is fixedly connected to the rotating shaft of the first drive motor 11. A fixing rod 13 perpendicular to the rotating rod 12 is fixedly connected to the rotating rod 12. The spiral blade 14 is fixedly connected to the rotating rod 12 through the fixing rod 13. The spiral blade 14 extends along the rotating rod 12 from the side of the transmission rod away from the first drive motor 11 towards the first drive motor 11. The distance between the spiral blade 14 and the rotating rod 12 increases as the diameter of the mixing barrel 1 increases. A feeding device is arranged at the upper end of the mixing barrel 1 for enabling different raw materials to enter the mixing barrel 1 simultaneously from the same pipeline. The mixing barrel 1 is used to accommodate and store various raw materials to be mixed. Setting the mixing barrel 1 in a funnel-shaped structure facilitates subsequent mixing and the discharge of the mixed raw materials. The mixed raw materials can be discharged from the outlet 15 at the lower end of the mixing barrel 1 along the barrel wall of the mixing barrel 1. The sealing cover 16 is used to seal the outlet 15. The outlet 15 and the sealing cover 16 are fixed by threaded connection. The first drive motor 11 is used to provide the power required for the rotating rod 12. Driven by the first drive motor 11, the rotating rod 12 is driven to rotate, enabling the rotating rod 12 to work continuously and stably, ensuring the high efficiency and stability of the mixing process. The rotating rod 12 is used to transmit the power of the first drive motor 11 and drive the spiral blade 14 to rotate. The rotating rod 12 can ensure the effective transmission of power and maintain the stability and efficiency of the entire stirring system. The spiral blade 14 is used to rotate and stir the raw materials inside the mixing barrel 1, enabling the raw materials to move along the spiral direction of the blade, promoting the raw materials to flip up and down and move radially inside the barrel, forming a good mixing flow, avoiding dead corners and uneven mixing, so as to achieve uniform mixing. The fixing rod 13 is used to fix the spiral blade 14 on the rotating rod 12 to ensure that it rotates with the rotating rod 12. The fixing rod 13 also plays a part in stirring. The distance between the spiral blade 14 and the rotating rod 12 increases as the diameter of the mixing barrel 1 increases, enabling the stirrer to adapt to the geometric changes of the mixing barrel 1, ensuring that the raw materials on the inner walls with different diameters at different heights can be fully stirred, and avoiding insufficient mixing of the materials in the edge area.

[0030] In this embodiment, the blanking device includes a blanking pipe 3 and a plurality of blanking funnels 2. The blanking pipe 3 is fixedly connected to the upper end of the mixing barrel 1. One end of the blanking pipe 3 communicates with the inside of the mixing barrel 1. The discharging end of the blanking funnel 2 is fixedly connected with a conveying device. An outlet pipe 24 is arranged between the conveying device and the blanking pipe 3. Both ends of the outlet pipe 24 are fixedly connected to the conveying device and the blanking pipe 3 respectively, and communicate with the inside of the conveying device and the inside of the blanking pipe 3. The blanking funnel 2 is used to temporarily store a single raw material and guide the raw material into the conveying device. The outlet pipe 24 is used to connect the conveying device and the blanking pipe 3 to ensure that the raw material coming out of the blanking funnel 2 can smoothly enter the blanking pipe 3 and then be conveyed into the mixing barrel 1. The outlet pipe 24 also plays a role in supporting the conveying device and the blanking funnel 2. The blanking pipe 3 is used to provide a channel so that different raw materials in different blanking funnels 2 can enter the mixing barrel through the same channel at the same time, thereby avoiding the raw material stratification caused by different raw material blanking orders. The setting of the blanking pipe 3 can effectively avoid the occurrence of this situation, improve the mixing efficiency, and enhance the mixing uniformity.

[0031] In this embodiment, the conveying device includes a conveying pipe 21, a screw rod 22, and a second driving motor 23. The blanking funnel 2 is perpendicular to the conveying pipe 21 and fixedly connected to the conveying pipe 21. The discharging end of the blanking funnel 2 communicates with the conveying pipe 21. The end of the conveying pipe 21 away from the blanking funnel 2 is fixedly connected to the blanking pipe 3 and communicates with the blanking pipe 3. The screw rod 22 is located inside the conveying pipe 21. The second driving motor 23 is fixedly connected to the end of the conveying pipe 21 away from the blanking pipe 3. One end of the screw rod 22 is fixedly connected to the rotating shaft of the second driving motor 23. The end of the screw rod 22 away from the second driving motor 23 extends towards the end of the conveying pipe 21 away from the second driving motor 23. The conveying pipe 21 is used to connect the blanking funnel 2 and the blanking pipe 3 and provide a channel for the raw material to be conveyed from the blanking funnel 2 to the blanking pipe 3 through the screw rod 22. The second driving motor 23 is used to provide power so that the screw rod 22 can rotate inside the conveying pipe 21, thereby realizing the conveying of the raw material. The screw rod 22 is used to convey the raw material. The raw material in the blanking funnel 2 is conveyed to the blanking pipe 3 through the rotation of the screw rod 22. The design of the screw rod 22 ensures the uniform conveying of the material inside the conveying pipe 21, avoiding the problems of blockage and uneven blanking. The rotation of the screw rod 22 can generate a continuous propulsive force, enabling the material to be efficiently conveyed from the blanking funnel 2 into the blanking pipe 3, which helps to improve the production efficiency. The conveying device can adjust the proportion of the raw material in the mixing barrel 1 by changing the rotation speed of the second driving motor 23, thereby changing the conveying speed of the screw rod 22 for the raw material. At the same time, the conveying of the raw material can be stopped by stopping the rotation of the second driving motor 23, achieving an emergency stop effect in special cases.

[0032] In this embodiment, a support rod 25 is fixedly connected to the conveying pipe 21. The support rod 25 extends towards the discharge pipe 24 and is fixedly connected to the discharge pipe 24. The support rod 25 is used to further support the transportation device and the blanking funnel 2 to ensure the stable operation of the transportation device and the blanking funnel 2.

[0033] In this embodiment, one end of the blanking pipe 3 away from the mixing barrel 1 is slidably connected with a limiting pipe 4. The limiting pipe 4 is located inside the blanking pipe 3, and the outer wall of the limiting pipe 4 abuts against the inner wall of the blanking pipe 3. A limiting block 31 is fixedly connected to the inner wall of the blanking pipe 3. The limiting block 31 extends towards the middle of the blanking pipe 3. A moving groove 42 is arranged on the side wall of the limiting pipe 4. The limiting block 31 is located in the moving groove 42. The limiting pipe 4 is provided with a number of discharge openings 41 having the same diameter as the discharge pipe 24. The limiting pipe 4 is provided with a limiting structure for restricting the sliding of the limiting pipe 4. The limiting pipe 4 is used to control the feeding of raw materials during the blanking process. By sliding in the blanking pipe 3, the limiting pipe 4 can adjust the position of the discharge openings 41 thereon to control the raw materials entering the mixing barrel 1, ensuring the uniformity and controllability of the raw material blanking. The setting of the limiting pipe 4 can prevent some raw materials from falling more quickly into the raw material barrel due to their large own weight at the beginning of the feeding, thereby causing bottom layering. The limiting pipe 4 can block the raw materials at the beginning, so that the raw materials first gather in the discharge pipe 24. When the raw materials gather to a certain extent, the operator moves the limiting pipe 4, and then starts to feed the raw materials. At this time, different raw materials can enter the mixing barrel 1 simultaneously. The limiting barrel can also quickly discharge the raw materials in the discharge pipe 24 in special cases. The limiting block 31 is used to limit the sliding range of the limiting pipe 4 in the blanking pipe 3. To prevent the limiting pipe 4 from sliding excessively and ensure that the limiting pipe 4 slides within a predetermined range, thereby ensuring the precise control of the raw materials by the limiting pipe 4. The moving groove 42 is used to provide a movement path for the limiting block 31 and allow the limiting pipe 4 to slide in the blanking pipe 3.

[0034] In this embodiment, the limiting structure includes a limiting member 5 and a baffle 51. The limiting member 5 is rotatably connected to the end of the limiting pipe 4 away from the blanking pipe 3. The end of the limiting member 5 facing the blanking pipe 3 extends towards the blanking pipe 3. The baffle 51 is fixedly connected to the end of the limiting member 5 facing the blanking pipe 3. Both ends of the baffle 51 extend towards the inner wall of the limiting pipe 4, and both ends of the baffle 51 are in contact with the end of the limiting block 31 facing the limiting member 5. The limiting member 5 is used to facilitate the operator to rotate the baffle 51. The limiting member 5 and the baffle 51 form an "I"-shaped structure. A horizontal handle should be provided at the end of the limiting member 5 outside the limiting pipe 4 to facilitate the operator to rotate the limiting member 5 and thus rotate the baffle 51. The baffle 51 is used to limit the sliding of the limiting pipe 4 and achieve positioning, so that the limiting pipe 4 can be stably positioned when it slides to a specific position, avoiding excessive sliding or getting out of control. When the baffle 51 is in contact with the limiting block 31, the discharge opening 41 of the limiting pipe 4 overlaps with the opening of the discharge pipe 24, and the raw material in the discharge pipe 24 can fall into the mixing barrel 1; when the baffle 51 is disconnected from the limiting block 31, the limiting pipe 4 freely falls due to gravity, and the opening of the discharge pipe 24 is blocked by the limiting pipe 4, and the raw material accumulates in the discharge pipe 24.

[0035] Embodiment 2

[0036] As Figures 8 to 10 shown, the difference between this embodiment and Embodiment 1 is that the limiting structure includes a support frame 32 and a linear motor 33. The support frame 32 is fixedly connected to the outside of the blanking pipe 3. The support frame 32 extends away from the mixing barrel 1. The linear motor 33 is fixedly connected to the support frame 32. The linear motor 33 faces the limiting pipe 4. The linear motor 33 includes a push rod 34. The push rod 34 extends away from the linear motor 33. The end of the push rod 34 away from the linear motor 33 is fixedly connected to the limiting pipe 4. The support frame 32 is used to fix the linear motor 33 to ensure that the linear motor 33 can stably push the push rod 34 to move. The linear motor 33 is used to drive the push rod 34 to move. The push rod 34 is used to drive the limiting pipe 4 to linearly move in the blanking pipe 3. In this embodiment, the linear motor 33 pushes the push rod 34, and then the push rod 34 drives the limiting pipe 4 to move, thereby controlling the position of the limiting pipe 4, achieving automation, reducing manual participation, and improving efficiency.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A biodegradable environmental protection plastic blending and processing device, including a mixing barrel (1), a stirring structure is provided inside the mixing barrel (1), a discharge port (15) is provided at the lower end of the mixing barrel (1), and a sealing cover (16) is detachably connected inside the discharge port (15), characterized in that, The mixing barrel (1) has a funnel-shaped structure. The stirring structure includes a first driving motor (11), a rotating rod (12), and a spiral blade (14). The first driving motor (11) is located at the upper end of the mixing barrel (1) and is fixedly connected to the mixing barrel (1). One end of the rotating rod (12) is fixedly connected to the rotating shaft of the first driving motor (11). The rotating rod (12) is fixedly connected with a fixing rod (13) perpendicular to the rotating rod (12). The spiral blade (14) is fixedly connected to the rotating rod (12) through the fixing rod (13). The spiral blade (14) extends along the rotating rod (12) from the side of the transmission rod away from the first driving motor (11) towards the first driving motor (11). The distance between the spiral blade (14) and the rotating rod (12) increases as the diameter of the mixing barrel (1) increases. A feeding device is provided at the upper end of the mixing barrel (1) for enabling different raw materials to enter the mixing barrel (1) simultaneously from the same pipeline.

2. The biodegradable environmental protection plastic blending and processing device according to claim 1, characterized in that, The feeding device includes a feeding pipe (3) and a plurality of feeding funnels (2). The feeding pipe (3) is fixedly connected to the upper end of the mixing barrel (1). One end of the feeding pipe (3) is communicated with the inside of the mixing barrel (1). The discharging end of the feeding funnel (2) is fixedly connected with a transporting device. There is a discharging pipe (24) between the transporting device and the feeding pipe (3). Both ends of the discharging pipe (24) are fixedly connected to the transporting device and the feeding pipe (3) respectively and are communicated with the inside of the transporting device and the inside of the feeding pipe (3).

3. The biodegradable environmental protection plastic blending and processing device according to claim 2, characterized in that, The transporting device includes a conveying pipe (21), a spiral rod (22), and a second driving motor (23). The feeding funnel (2) is perpendicular to the conveying pipe (21) and is fixedly connected to the conveying pipe (21). The discharging end of the feeding funnel (2) is communicated with the conveying pipe (21). The end of the conveying pipe (21) away from the feeding funnel (2) is fixedly connected to the feeding pipe (3) and is communicated with the feeding pipe (3). The spiral rod (22) is located inside the conveying pipe (21). The second driving motor (23) is fixedly connected to the end of the conveying pipe (21) away from the feeding pipe (3). One end of the spiral rod (22) is fixedly connected to the rotating shaft of the second driving motor (23). The end of the spiral rod (22) away from the second driving motor (23) extends towards the end of the conveying pipe (21) away from the second driving motor (23).

4. A biodegradable environmental protection plastic blending and processing device according to claim 3, characterized in that, The conveying pipe (21) is fixedly connected with a support rod (25). The support rod (25) extends towards the discharging pipe (24) and is fixedly connected to the discharging pipe (24).

5. The biodegradable environmental protection plastic blending and processing device according to claim 2, characterized in that, One end of the blanking pipe (3) far away from the mixing barrel (1) is slidably connected with a limiting pipe (4). The limiting pipe (4) is located inside the blanking pipe (3), and the outer wall of the limiting pipe (4) abuts against the inner wall of the blanking pipe (3). A limiting block (31) is fixedly connected to the inner wall of the blanking pipe (3), and the limiting block (31) extends towards the middle of the blanking pipe (3). A moving groove (42) is provided on the side wall of the limiting pipe (4), and the limiting block (31) is located in the moving groove (42). The limiting pipe (4) is provided with a number of discharge openings (41) having the same diameter as the discharge pipe (24). The limiting pipe (4) is provided with a limiting structure for restricting the sliding of the limiting pipe (4).

6. The biodegradable environmental protection plastic blending and processing device according to claim 5, characterized in that, The limiting structure includes a limiting member (5) and a baffle (51). The limiting member (5) is rotatably connected to one end of the limiting pipe (4) far away from the blanking pipe (3). One end of the limiting member (5) facing the blanking pipe (3) extends towards the blanking pipe (3). The baffle (51) is fixedly connected to one end of the limiting member (5) facing the blanking pipe (3). Both ends of the baffle (51) extend towards the inner wall of the limiting pipe (4), and both ends of the baffle (51) abut against one end of the limiting block (31) facing the limiting member (5).