Closed stirring device for degradable plastics

Abstract

The utility model belongs to the technical field of degradable plastics, and particularly relates to a degradable plastic closed stirring device which comprises a stirring barrel and supporting legs, the supporting legs are fixedly connected below the stirring barrel, a cleaning device is arranged in the stirring barrel, and the cleaning device comprises a motor, a support, a driving gear, a driven gear, a hose and a hollow stirring shaft. According to the degradable plastic closed stirring device, a motor drives a driving gear and a driven gear to rotate, so that a hollow stirring shaft rotates, meanwhile, high-speed water flow is injected into the hollow stirring shaft through a hose and sprayed out from through holes in the outer surface of the hollow stirring shaft to clean the inner wall of a stirring barrel, and the hollow stirring shaft drives a stirring rod to complete stirring; the scraping rod can scrape materials attached to the inner wall of the stirring barrel, the flow meter measures the amount of liquid passing through the interior of the feeding port, the flow meter is communicated with the electric push rod through a signal line, and when the amount of the liquid passing through reaches a preset value, the flow meter sends a signal to the electric push rod to enable the spoiler to move inwards to prevent the liquid from entering the stirring barrel.

Description

Technical Field

[0001] This utility model relates to the field of degradable plastics technology, specifically to a closed stirring device for degrading plastics. Background Technology

[0002] Plastic products have facilitated numerous industries and are now closely related to people's daily lives. However, years of use of plastic products have revealed a series of problems, the most serious of which is the problem of "white pollution." Traditional plastic waste is difficult to degrade in nature, and "microplastics" accumulate in the food chain, seriously affecting the ecological balance and human health. The requirement for plastic products is to develop biodegradable plastics.

[0003] In the preparation of biodegradable plastics, a mixer is often used to add water and mix the materials to form a liquid. The liquid is then spray-dried using a spray dryer. However, in some biodegradable plastic production processes, ethanol is used instead of water as a solvent during mixing. Due to the volatility of ethanol, the mixing process needs to be sealed to prevent the ethanol from evaporating and combining with the air to form an explosive, which would affect safe production. Existing mixing devices cannot effectively solve the problem of ethanol volatility, allowing ethanol to leak into the air and affecting production safety.

[0004] For example, Chinese patent CN113894959A discloses an energy-saving sealed mixer for the production of biodegradable plastics, including a conical sealed mixing chamber. A mixing device is installed inside the conical sealed mixing chamber. A leak-proof feeding device is located on one side of the top of the conical sealed mixing chamber, and an adjustable vacuum pump is located on the other side of the top of the conical sealed mixing chamber. This invention, through the cooperation of the sealed conical feeding chamber and the vacuum pump, effectively removes air during raw material injection, thereby preventing the evaporation of ethanol and the formation of explosives from air during the mixing process, thus avoiding production safety issues. Simultaneously, the protection of inert gas ensures the safety of the mixing process. When discharging material, the discharge pipe leaves some material residue, thus liquid-sealing the conical sealed mixing chamber to prevent leakage of inert gas and ethanol gas, ensuring the sealing performance of the device. The use of a conical sealing seat and a conical flared pipe avoids the problem of material jamming that can occur with traditional valves.

[0005] However, the inside of the mixing tank is difficult to clean, which can easily affect the product quality during the next mixing and production. Utility Model Content

[0006] The purpose of this invention is to provide a closed-loop mixing device for degrading plastics, in order to solve the problem mentioned in the background art that the inside of the mixing tank is difficult to clean, which can easily affect the product quality in the next mixing production.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a closed stirring device for degrading plastics, comprising a stirring drum and a support leg, wherein the support leg is fixedly connected to the bottom of the stirring drum, and a cleaning device is provided inside the stirring drum;

[0008] The cleaning device includes a motor, a bracket, a drive gear, a driven gear, a hose, and a hollow stirring shaft. The bracket is fixedly connected to the top of the stirring drum, the motor is mounted on the top of the bracket, the drive gear is connected to the motor output end, the driven gear meshes with the outer surface of the drive gear, the hollow stirring shaft is embedded in the inner surface of the driven gear and passes through the top of the stirring drum, and the hose is rotatably connected to the top of the hollow stirring shaft. The motor drives the drive gear and the driven gear to rotate, causing the hollow stirring shaft to rotate. At the same time, a high-speed water flow is injected into the hollow stirring shaft through the hose and sprayed out from the through hole on the outer surface of the hollow stirring shaft to rotate and clean the inner wall of the stirring drum.

[0009] Preferably, a stirring rod is fixedly connected to the outer surface of the hollow stirring shaft, and a scraper is fixedly connected to the lower part of the hollow stirring shaft. The scraper contacts the inner wall of the stirring drum, and the stirring rod is driven by the hollow stirring shaft to complete the stirring purpose. The scraper can scrape off the material adhering to the inner wall of the stirring drum.

[0010] Preferably, the bracket has a threaded hole on its upper part, and the motor and the bracket are connected by bolts through the threaded hole, which facilitates the maintenance and replacement of the motor and improves the convenience of the cleaning device.

[0011] Preferably, a quantitative feeding device is provided above the mixing drum. The quantitative feeding device includes a flow meter, a feed inlet, an ethanol feed pipe, a plastic feed pipe, a baffle plate, a connecting plate, an electric push rod, and a fixing frame. The feed inlet is fixedly connected to the top of the mixing drum. The flow meter is fixedly installed on the outer surface of the feed inlet. The ethanol feed pipe is fixedly connected above the feed inlet. The plastic feed pipe is fixedly connected above the feed inlet. The fixing frame is fixedly connected to the outer surface of the feed inlet. The electric push rod is installed above the fixing frame. The connecting plate is connected to the output end of the electric push rod. The baffle plate is fixedly connected to one side of the connecting plate and slidably connected inside the feed inlet. The flow meter measures the amount of liquid passing through the feed inlet. The flow meter and the electric push rod are connected by a signal line. When the amount of liquid passing through reaches a preset value, the flow meter sends a signal to the electric push rod to move the baffle plate inward to prevent liquid from entering the mixing drum.

[0012] Preferably, a threaded hole is provided on one side of the fixed frame, and the electric push rod is connected to the fixed frame by bolt thread through the threaded hole. The threaded connection can make the electric push rod work more stably and improve the stability of the quantitative feeding device.

[0013] Preferably, an inert gas inlet is fixedly connected above the stirring drum, a valve is fixedly installed above the outer surface of the inert gas inlet, and a vacuum pump is fixedly installed above the stirring drum. The vacuum pump removes the air inside the stirring drum and injects inert gas into the inert gas inlet, replacing the air inside the stirring drum with inert gas to reduce the possibility of ethanol evaporation and mixing with air to form an explosive during stirring.

[0014] Preferably, a sealing discharge device is provided below the mixing drum. The sealing discharge device includes a discharge port, a mounting frame, a cylinder, a spring, a sealing plate, and a mounting groove. The discharge port is fixedly connected to the bottom of the mixing drum, the mounting frame is fixedly connected to the bottom of the discharge port, the cylinder is fixedly installed inside the mounting frame, the mounting groove is opened inside the bottom of the discharge port, the sealing plate is installed above the output end of the cylinder, and the spring is fixedly connected inside the mounting groove with its other end fixedly connected to the bottom of the sealing plate. The cylinder pushes the sealing plate to allow the mixed liquid to flow out. After the cylinder retracts, the sealing plate covers the discharge port again under the tension of the spring.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This biodegradable plastic enclosed stirring device uses a motor to drive the drive gear and driven gear to rotate, causing the hollow stirring shaft to rotate. At the same time, high-speed water is injected into the hollow stirring shaft through a hose and sprayed out from the through holes on the outer surface of the hollow stirring shaft to rotate and clean the inner wall of the stirring drum. The hollow stirring shaft drives the stirring rod to complete the stirring purpose, and the scraper can scrape off the material adhering to the inner wall of the stirring drum.

[0017] 2. This biodegradable plastic closed stirring device measures the amount of liquid passing through the inlet using a flow meter. The flow meter is connected to the electric push rod via a signal line. When the amount of liquid passing through reaches a preset value, the flow meter sends a signal to the electric push rod to move the baffle plate inward to prevent the liquid from entering the stirring drum.

[0018] 3. This biodegradable plastic closed mixing device allows the mixed liquid to flow out by pushing the sealing plate with a cylinder. After the cylinder retracts, the sealing plate covers the outlet again under the tension of the spring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the stirring and cleaning structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the quantitative feeding structure of this utility model;

[0022] Figure 4This is a schematic diagram of the sealed discharge structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the discharge port of this utility model.

[0024] In the diagram: 1. Stirring drum; 101. Support leg; 2. Inertial air inlet; 201. Valve; 202. Vacuum pump; 3. Motor; 301. Bracket; 302. Drive gear; 303. Driven gear; 304. Hoses; 305. Hollow stirring shaft; 306. Stirring rod; 307. Scraper; 4. Flow meter; 401. Feed inlet; 402. Ethanol feed pipe; 403. Plastic feed pipe; 404. Baffle plate; 405. Connecting plate; 406. Electric push rod; 407. Fixing frame; 5. Discharge port; 501. Mounting frame; 502. Cylinder; 503. Spring; 504. Sealing plate; 505. Mounting groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Addressing the issue that cleaning the interior of existing mixing tanks is difficult and can negatively impact product quality in subsequent batches, this embodiment provides a biodegradable, sealed mixing device for plastics. Please refer to [link / reference needed]. Figures 1-5 The embodiment provides a closed-loop mixing device for degrading plastics, which can clean the inside of the mixing drum, thereby reducing the impact on product quality in the next production. The closed-loop mixing device for degrading plastics includes a mixing drum 1 and a support leg 101. The support leg 101 is fixedly connected to the bottom of the mixing drum 1, and a cleaning device is provided inside the mixing drum 1.

[0028] The cleaning device includes a motor 3, a bracket 301, a drive gear 302, a driven gear 303, a hose 304, and a hollow stirring shaft 305. The bracket 301 is fixedly connected to the top of the mixing drum 1. The motor 3 is mounted on the top of the bracket 301. The drive gear 302 is connected to the output end of the motor 3. The driven gear 303 meshes with the outer surface of the drive gear 302. The hollow stirring shaft 305 is embedded in the inner surface of the driven gear 303 and passes through the top of the mixing drum 1. The hose 304 is rotatably connected to the top of the hollow stirring shaft 305. A stirring rod 306 is fixedly connected to the outer surface of the hollow stirring shaft 305. A scraper 307 is fixedly connected to the bottom of the hollow stirring shaft 305. The scraper 307 contacts the inner wall of the mixing drum 1. The hose 304 injects high-speed water into the hollow stirring shaft 305 so that water for cleaning the inner wall of the mixing drum 1 can be sprayed out from the through hole on the outer surface of the hollow stirring shaft 305.

[0029] In this embodiment, the motor 3 drives the driving gear 302 and the driven gear 303 to rotate, causing the hollow stirring shaft 305 to rotate. At the same time, a high-speed water flow is injected into the hollow stirring shaft 305 through the hose 304 and sprayed out from the through hole on the outer surface of the hollow stirring shaft 305 to rotate and clean the inner wall of the stirring drum 1. The hollow stirring shaft 305 drives the stirring rod 306 to complete the stirring purpose. The scraper 307 can scrape off the material attached to the inner wall of the stirring drum 1.

[0030] Example 2: Based on Example 1, as follows Figures 1-5 As shown, the equipment requires quantitative feeding to ensure more complete degradation and higher efficiency, therefore a quantitative feeding device is installed above the mixing drum 1;

[0031] The quantitative feeding device includes a flow meter 4, a feed inlet 401, an ethanol feed pipe 402, a plastic feed pipe 403, a baffle plate 404, a connecting plate 405, an electric push rod 406, and a fixing frame 407. The feed inlet 401 is fixedly connected to the top of the mixing drum 1. The flow meter 4 is fixedly installed on the outer surface of the feed inlet 401. The ethanol feed pipe 402 is fixedly connected to the top of the feed inlet 401. The plastic feed pipe 403 is fixedly connected to the top of the feed inlet 401. The fixing frame 407 is fixedly connected to the outer surface of the feed inlet 401. The electric push rod 406 is installed on the top of the fixing frame 407. The connecting plate 405 is connected to the output end of the electric push rod 406. The baffle plate 404 is fixedly connected to one side of the connecting plate 405 and slidably connected inside the feed inlet 401.

[0032] In this embodiment, the flow meter 4 measures the amount of liquid passing through the inlet 401. The flow meter 4 and the electric push rod 406 are connected by a signal line. When the amount of liquid passing through reaches a preset value, the flow meter 4 sends a signal to the electric push rod 406 to move the baffle plate 404 inward to prevent the liquid from entering the mixing tank 1.

[0033] Example 3: Based on Examples 1 and 2, as follows... Figures 1-5 As shown, to ensure the sealing of the discharge port, a sealing discharge device is provided below the mixing drum 1. The sealing discharge device includes a discharge port 5, a mounting frame 501, a cylinder 502, a spring 503, a sealing plate 504, and a mounting groove 505. The discharge port 5 is fixedly connected to the bottom of the mixing drum 1, the mounting frame 501 is fixedly connected to the bottom of the discharge port 5, the cylinder 502 is fixedly installed inside the mounting frame 501, the mounting groove 505 is opened inside the bottom of the discharge port 5, the sealing plate 504 is installed above the output end of the cylinder 502, and the spring 503 is fixedly connected inside the mounting groove 505 with its other end fixedly connected to the bottom of the sealing plate 504.

[0034] In this embodiment, the cylinder 502 pushes the sealing plate 504 to allow the stirred liquid to flow out. After the cylinder 502 retracts, the sealing plate 504 covers the discharge port 5 again under the tension of the spring 503.

[0035] Working principle: The motor 3 drives the drive gear 302 and driven gear 303 to rotate, causing the hollow stirring shaft 305 to rotate. Simultaneously, high-speed water is injected into the hollow stirring shaft 305 through the hose 304 and sprayed out from the through-hole on the outer surface of the hollow stirring shaft 305, rotating and cleaning the inner wall of the stirring drum 1. The hollow stirring shaft 305 drives the stirring rod 306 to complete the stirring purpose. The scraper 307 can scrape off the material adhering to the inner wall of the stirring drum 1. The flow meter 4 measures the amount of liquid passing through the inlet 401. The flow meter 4 is connected to the electric push rod 406 via a signal line. When the amount of liquid passing through reaches a preset value, the flow meter 4 sends a signal to the electric push rod 406, causing the baffle plate 404 to move inward to prevent liquid from entering the stirring drum 1. The cylinder 502 pushes the sealing plate 504 to allow the stirred liquid to flow out. After the cylinder 502 retracts, the sealing plate 504, under the tension of the spring 503, covers the outlet 5 again.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A closed-type stirring device for degrading plastics, comprising a stirring drum (1) and a support leg (101), characterized in that: The support leg (101) is fixedly connected to the bottom of the mixing drum (1), and a cleaning device is provided inside the mixing drum (1); The cleaning device includes a motor (3), a bracket (301), a drive gear (302), a driven gear (303), a hose (304), and a hollow stirring shaft (305). The bracket (301) is fixedly connected to the top of the stirring drum (1). The motor (3) is installed on the top of the bracket (301). The drive gear (302) is connected to the output end of the motor (3). The driven gear (303) meshes with the outer surface of the drive gear (302). The hollow stirring shaft (305) is embedded in the inner surface of the driven gear (303) and passes through the top of the stirring drum (1). The hose (304) is rotatably connected to the top of the hollow stirring shaft (305).

2. The closed-loop stirring device for degrading plastics according to claim 1, characterized in that: A stirring rod (306) is fixedly connected to the outer surface of the hollow stirring shaft (305), and a scraper (307) is fixedly connected below the hollow stirring shaft (305). The scraper (307) is in contact with the inner wall of the stirring cylinder (1).

3. The closed-loop stirring device for degrading plastics according to claim 1, characterized in that: The bracket (301) has a threaded hole on its upper part, and the motor (3) and the bracket (301) are connected by bolt threads through the threaded hole.

4. The closed-loop stirring device for degrading plastics according to claim 1, characterized in that: A metering feed device is provided above the mixing drum (1). The metering feed device includes a flow meter (4), a feed inlet (401), an ethanol feed pipe (402), a plastic feed pipe (403), a baffle plate (404), a connecting plate (405), an electric push rod (406), and a fixing frame (407). The feed inlet (401) is fixedly connected to the top of the mixing drum (1). The flow meter (4) is fixedly installed on the outer surface of the feed inlet (401). The ethanol feed pipe (402) is... The plastic feed tube (403) is fixedly connected above the feed inlet (401), the fixed frame (407) is fixedly connected to the outer surface of the feed inlet (401), the electric push rod (406) is installed above the fixed frame (407), the connecting plate (405) is connected to the output end of the electric push rod (406), and the flow baffle (404) is fixedly connected to one side of the connecting plate (405) and slidably connected to the inside of the feed inlet (401).

5. The closed-loop stirring device for degrading plastics according to claim 4, characterized in that: The fixed frame (407) has a threaded hole on one side, and the electric push rod (406) is connected to the fixed frame (407) by bolt thread through the threaded hole.

6. The closed-loop stirring device for degrading plastics according to claim 1, characterized in that: An inert air inlet (2) is fixedly connected above the stirring drum (1), a valve (201) is fixedly installed above the outer surface of the inert air inlet (2), and a vacuum pump (202) is fixedly installed above the stirring drum (1).

7. The closed-loop stirring device for degrading plastics according to claim 1, characterized in that: A sealing discharge device is provided below the mixing drum (1). The sealing discharge device includes a discharge port (5), a mounting frame (501), a cylinder (502), a spring (503), a sealing plate (504), and a mounting groove (505). The discharge port (5) is fixedly connected to the bottom of the mixing drum (1). The mounting frame (501) is fixedly connected to the bottom of the discharge port (5). The cylinder (502) is fixedly installed inside the mounting frame (501). The mounting groove (505) is opened inside the bottom of the discharge port (5). The sealing plate (504) is installed above the output end of the cylinder (502). The spring (503) is fixedly connected inside the mounting groove (505) and its other end is fixedly connected to the bottom of the sealing plate (504).

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