A waste plastic airflow conveying device
The spiral inner tube device driven by negative pressure airflow utilizes the high-speed impact of plastic particles and centrifugal force to achieve rapid drying of waste plastics, solving the problems of high energy consumption and long time of traditional drying methods, and achieving efficient plastic dehydration and drying effect.
Patent Information
- Application Number
- CN202522042438.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-23
AI Technical Summary
Existing waste plastic drying technologies are energy-intensive and time-consuming, and traditional blowing and air drying methods are inefficient, requiring faster drying methods.
The spiral inner tube conveying device, driven by negative pressure airflow, uses the power provided by the spiral inner tube and airflow to cause plastic particles to impact the spiral inner tube wall at high speed, thereby dehydrating them. The liquid is then quickly discharged through the annular liquid collection tank and liquid outlet pipe on the spiral outer tube, achieving rapid drying.
It enables rapid dehydration and drying of plastics, has a simple structure, and reduces energy consumption and time costs.
Smart Images
Figure CN224677300U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of plastic pneumatic conveying technology, specifically relating to a waste plastic pneumatic conveying device. Background Technology
[0002] With the increasing consumption of plastic products, the amount of waste plastic is also increasing. As an emerging industry, waste plastic processing is growing in scale, variety, and output. Currently, waste plastic recycling processes include collection, sorting, crushing, washing, drying, granulation, and molding. After washing, waste plastic needs to be dried. Traditional drying methods include blowing, baking, or air drying. Baking and air drying consume a lot of electricity or prolong the drying time. To reduce the drying time and cost of plastics, blowing technology is generally used, but this drying technology still requires a certain amount of time. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a waste plastic pneumatic conveying device, which is simple in structure, convenient and practical. It uses negative pressure airflow to make plastic pass through the spiral inner tube quickly. The conveying power provided by the spiral inner tube and the airflow achieves the purpose of dehydration by the impact force formed by the plastic hitting the wall of the spiral inner tube.
[0004] A waste plastic pneumatic conveying device includes a collection device, a conveying and dewatering mechanism, a feed pipe, and a pneumatic discharge pipe. The feed pipe is connected to the collection device through the conveying and dewatering mechanism, and the pneumatic discharge pipe is connected to the bottom of the collection device. The conveying and dewatering mechanism includes a sealed dewatering box, a spiral dewatering pipe, a sealed connecting bearing, a transmission pulley, a sealed bearing, a conical sealing ring, an upper fixing plate, a sealing connecting ring, and a power unit. The spiral dewatering pipe is disposed inside the sealed dewatering box, and its two ends are respectively connected to the upper and lower ends of the dewatering box through the sealed connecting bearing. The dewatering box is connected to the collection device through the sealing connecting ring. The upper end of the spiral dewatering pipe is connected to the conical sealing ring through the sealed bearing. The conical sealing ring is connected to the feed pipe through the upper fixing plate. The transmission pulley is sleeved on the upper end of the spiral dewatering pipe and is connected to the power unit for transmission.
[0005] Preferably, the spiral dehydration tube includes an outer spiral tube and an inner spiral tube. The inner spiral tube is disposed inside the outer spiral tube and has several liquid outlet holes. Both ends of the outer spiral tube are connected to the inner spiral tube with connecting sealing rings. Both ends of the inner spiral tube are connected to an extension central tube. The extension central tube is connected to the sealed dehydration tank through a sealed connecting bearing. The outer wall of the outer spiral tube has uniformly distributed liquid ejection holes.
[0006] Preferably, the spiral outer tube is provided with an annular liquid collecting tank, and the annular liquid collecting tank is connected to a liquid outlet pipe.
[0007] Preferably, a feed hopper is connected to the extended central pipe near the feed pipe, and the feed hopper is disposed inside the conical sealing ring.
[0008] Preferably, a waterproof ring is connected to one end of the spiral outer tube near the sealing connection ring.
[0009] Preferably, the bottom of the dehydration tank has an overflow ring, and the sealed connecting bearing is connected inside the overflow ring.
[0010] Preferably, the material collection device includes a conical material collection box, a negative pressure pipe, a connecting pipe, and a discharge valve. The conical material collection box is connected to the airflow discharge pipe through the discharge valve. The connecting pipe is connected to the top of the conical material collection box, and the negative pressure pipe is connected to one side of the conical material collection box. Beneficial effects
[0011] (1) The waste plastic airflow conveying device of this utility model has a simple structure and is convenient and practical. It uses negative pressure airflow to make the plastic pass through the spiral inner tube quickly. The conveying power provided by the spiral inner tube and the airflow achieves the purpose of dehydration by the impact force formed by the plastic hitting the spiral inner tube wall.
[0012] (2) The waste plastic pneumatic conveying device of this utility model uses centrifugal force to throw the liquid on the outer wall of the spiral inner tube onto the inner wall of the spiral outer tube, and then discharges it through the annular liquid collection tank and liquid outlet pipe on the spiral outer tube, so as to achieve the purpose of quickly drying plastic by discharging liquid in sections. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the airflow conveying device; Figure 2 This is a schematic diagram of the structure of a sealed dehydration tank; Figure 3 This is a schematic diagram of the material collection device. 1-Collection device, 11-Conical collection box, 12-Negative pressure pipe, 13-Connecting pipe, 14-Discharge valve, 2-Conveying and dewatering mechanism, 21-Sealed dewatering box, 22-Spiral dewatering pipe, 23-Annular liquid collection tank, 24-Discharge pipe, 25-Spiral outer pipe, 26-Spiral inner pipe, 27-Sealed connecting bearing, 28-Transmission pulley, 29-Sealed bearing, 210-Conical sealing ring, 211-Feed hopper, 212-Upper fixed plate, 213-Connecting sealing ring, 214-Waterproof ring, 215-Overflow ring, 216-Sealed connecting ring, 3-Feed pipe, 4-Airflow discharge pipe. Detailed Implementation
[0014] The embodiments of this utility model are further described below with reference to the accompanying drawings. Example
[0015] like Figures 1 to 3As shown; a waste plastic pneumatic conveying device includes a collection device 1, a conveying and dewatering mechanism 2, a feed pipe 3, and a pneumatic discharge pipe 4. The feed pipe 3 is connected to the collection device 1 through the conveying and dewatering mechanism 2, and the pneumatic discharge pipe 4 is connected to the bottom of the collection device 1. The conveying and dewatering mechanism 2 includes a sealed dewatering box 21, a spiral dewatering pipe 22, a sealed connecting bearing 27, a transmission pulley 28, a sealed bearing 29, a conical sealing ring 210, an upper fixing plate 212, a sealing connecting ring 216, and a power unit. The spiral dewatering pipe 22 is equipped with... The spiral dewatering pipe 22 is connected to the upper and lower ends of the sealed dewatering tank 21 via sealed connecting bearings 27. The dewatering tank 21 is connected to the collecting device 1 via a sealing connecting ring 216. The upper end of the spiral dewatering pipe 22 is connected to a conical sealing ring 210 via a sealed bearing 29. The conical sealing ring 210 is connected to the feed pipe 3 via an upper fixing plate 212. The transmission pulley 28 is sleeved on the upper end of the spiral dewatering pipe 22 and is connected to the power device for transmission. The spiral dewatering pipe 22 includes a spiral outer tube 25 and a spiral inner tube 26. The spiral inner tube 26 is arranged in the spiral... Inside the spiral outer tube 25, the spiral inner tube 26 has several liquid outlet holes. Both ends of the spiral outer tube 25 are connected to the spiral inner tube 26 with connecting sealing rings 213. Both ends of the spiral inner tube 26 are connected to extended central tubes, which are connected to the sealed dehydration tank 21 via sealed connecting bearings 27. The outer wall of the spiral outer tube 25 has evenly distributed liquid-throwing holes. An annular liquid collecting groove 23 is provided on the spiral outer tube 25, and a liquid outlet pipe 24 is connected to the annular liquid collecting groove 23. A feed hopper 211 is connected to the extended central tube near the feed pipe 3. The bucket 211 is set inside the conical sealing ring 210; a waterproof ring 214 is connected to one end of the spiral outer tube 25 near the sealing connecting ring 216; an overflow ring 215 passes through the bottom of the dewatering tank 21, and the sealing connecting bearing 27 is connected inside the overflow ring 215; the material collection device 1 includes a conical material collection box 11, a negative pressure pipe 12, a connecting pipe 13, and a discharge valve 14. The conical material collection box 11 is connected to the airflow discharge pipe 4 through the discharge valve 14, the connecting pipe 13 is connected to the top of the conical material collection box 11, and the negative pressure pipe 12 is connected to one side of the conical material collection box 11.
[0016] The negative pressure pipe 12 is connected to the negative pressure device, creating a negative pressure state in the conical collection box 11. Plastic particles introduced into the feed hopper 211 by the feed pipe 3 pass rapidly through the spiral inner tube 26 under the negative pressure. The high-speed moving plastic particles impact the wall of the spiral inner tube 26, achieving rapid centrifugal impact dehydration. The dehydrated plastic particles enter the conical collection box 11 through the connecting pipe 13. A power device drives the transmission pulley 28 to rotate. The power device includes a motor, a power pulley, and a transmission belt. The motor drives the power pulley to rotate, which in turn drives the transmission pulley 28 to rotate via the transmission belt. The transmission pulley 28 then drives the spiral dehydration pipe 22 to rotate. The rotation causes the dehydrated liquid adhering to the inner spiral tube 26 to be thrown onto the inner wall of the outer spiral tube 25. The liquid flows to the annular collection tank 23 and is then discharged through the outlet pipe 24 into the sealed dehydration tank 21. It is then discharged through the drain port on the sealed dehydration tank 21. The drain port needs to be connected to a U-shaped overflow pipe to avoid a decrease in negative pressure. At the same time, it is necessary to control the rotation speed of the spiral dehydration tube 22, with the speed controlled between 100 and 300 revolutions per minute. If the speed is too low, the liquid on the inner spiral tube 26 will not be easily thrown onto the outer spiral tube 25. The dehydrated plastic particles are intermittently transported to the airflow outlet pipe 4 through the opening of the discharge valve 14. A high-speed airflow is introduced into the airflow outlet pipe 4.
[0017] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model are covered within the scope of this utility model.
Claims
1. A waste plastic pneumatic conveying device, characterized in that: It includes a material collection device (1), a conveying and dewatering mechanism (2), a feed pipe (3), and an airflow discharge pipe (4). The feed pipe (3) is connected to the material collection device (1) through the conveying and dewatering mechanism (2), and the airflow discharge pipe (4) is connected to the bottom of the material collection device (1). The conveying and dewatering mechanism (2) includes a sealed dewatering box (21), a spiral dewatering pipe (22), a sealed connecting bearing (27), a transmission pulley (28), a sealed bearing (29), a conical sealing ring (210), an upper fixed plate (212), a sealing connecting ring (216), and a moving... The spiral dewatering pipe (22) is installed inside the sealed dewatering box (21) and its two ends are connected to the upper and lower ends of the dewatering box (21) respectively through sealed connecting bearings (27). The dewatering box (21) is connected to the collecting device (1) through a sealing connecting ring (216). The upper end of the spiral dewatering pipe (22) is connected to the conical sealing ring (210) through a sealing bearing (29). The conical sealing ring (210) is connected to the feed pipe (3) through an upper fixing plate (212). The transmission pulley (28) is sleeved on the upper end of the spiral dewatering pipe (22) and is connected to the power device for transmission.
2. The waste plastic pneumatic conveying device as described in claim 1, characterized in that: The spiral dehydration tube (22) includes a spiral outer tube (25) and a spiral inner tube (26). The spiral inner tube (26) is located inside the spiral outer tube (25). The spiral inner tube (26) has several liquid outlet holes. Both ends of the spiral outer tube (25) are connected to the spiral inner tube (26) with connecting sealing rings (213). Both ends of the spiral inner tube (26) are connected with extension central tubes. The extension central tubes are connected to the sealed dehydration box (21) through a sealed connecting bearing (27). The outer wall of the spiral outer tube (25) is uniformly provided with liquid ejection holes.
3. The waste plastic pneumatic conveying device as described in claim 2, characterized in that: The spiral outer tube (25) is provided with an annular liquid collection tank (23), and the annular liquid collection tank (23) is connected to a liquid outlet pipe (24).
4. The waste plastic pneumatic conveying device as described in claim 3, characterized in that: An extended central tube near the feed pipe (3) is connected to a feed hopper (211), which is located inside a conical sealing ring (210).
5. The waste plastic pneumatic conveying device as described in claim 4, characterized in that: A waterproof ring (214) is connected to one end of the spiral outer tube (25) near the sealing connection ring (216).
6. The waste plastic pneumatic conveying device as described in claim 5, characterized in that: The bottom of the dehydration tank (21) is perforated by an overflow ring (215), and the sealed connecting bearing (27) is connected inside the overflow ring (215).
7. A waste plastic pneumatic conveying device as described in claim 1 or 6, characterized in that: The material collection device (1) includes a conical material collection box (11), a negative pressure pipe (12), a connecting pipe (13), and a discharge valve (14). The conical material collection box (11) is connected to the airflow discharge pipe (4) through the discharge valve (14). The connecting pipe (13) is connected to the top of the conical material collection box (11), and the negative pressure pipe (12) is connected to one side of the conical material collection box (11).