A raw material transfer device for processing a clara tube and a transfer method thereof

Abstract

The application discloses a raw material transfer device for processing of a clamping tube and a transfer method thereof, and relates to the field of spiral conveyors, which comprises a cylinder, a main feeding port is arranged at the top of the cylinder, a discharging port is arranged at the bottom of the cylinder, a transmission shaft is rotationally connected to the inside of the cylinder, a driving device is connected to the transmission shaft, a secondary spiral blade is arranged at one end of the transmission shaft close to the main feeding port, a first disc and a second disc are rotationally connected to the two ends of the transmission shaft respectively, a primary spiral blade is arranged between the first disc and the second disc, and the secondary spiral blade and the primary spiral blade are connected through speed reduction and same direction transmission. When the material is added through the hopper, the material fills the feeding port in a short time, the secondary spiral blade rotates at a higher speed to push the material around, that is, the material in the primary spiral blade is pushed to the front, the material is spread to the front, and thus the pressure borne by the primary spiral blade is reduced.

Description

Technical Field

[0001] This invention relates to the field of screw conveyor applications, specifically to a raw material transfer device and method for processing kraft tubes. Background Technology

[0002] The formal name of the Krah pipe is high-density polyethylene structural wall hot-wound pipe. It is a new type of irregular structural wall pipe made of high-density polyethylene as the main raw material and using hot-wound molding process. The smooth inner wall ensures smooth water flow and reduces resistance loss. The spiral reinforcing ribs on the outer wall use polypropylene or single-wall corrugated pipe as auxiliary support structure to greatly improve ring stiffness and resistance to external pressure.

[0003] The raw materials for Krah pipes are typically high-density polyethylene granules and additives (antioxidants, UV stabilizers, and color masterbatch granules) mixed according to a formula and dried at 95-100℃ to remove moisture. Raw materials are initially transported in ton bags, kraft paper bags, or drums. During processing, the materials are transported using screw conveyors, pneumatic conveying systems, bucket elevators, and electric flatbed trucks. Among these, the screw conveyor is a continuous conveying machine without flexible traction components. Its core principle is to use rotating helical blades to propel materials axially along a fixed casing, achieving closed-loop conveying of powdery, granular, and small lump materials. In Krah pipe production, it is commonly used for short-distance transport of HDPE granules from the warehouse to the extruder hopper, preventing dust from flying and ensuring the cleanliness of the raw materials.

[0004] When a screw conveyor is in use, material is added into the cylinder of the equipment through a hopper. The drive unit rotates the screw shaft to achieve horizontal conveying of the material. When adding material, workers usually use a crane to grab the material bag, and then the material in the bag is put into the hopper all at once or in batches. The actual amount put in depends on the capacity of the hopper. When the hopper is filled with material, the feed inlet is squeezed and blocked instantly. The screw shaft and motor will be subjected to an extremely large overload instantly. The filling rate of the screw conveyor is designed to be only 20% to 40%. The material is loose and the resistance is small. The motor and shaft are lightly loaded and run smoothly. When the feed inlet is completely compacted and blocked, the filling rate directly reaches close to 100%. The material is forcibly squeezed between the screw blades and the casing. The friction resistance and pushing resistance increase instantly by several times. This is the most typical and most taboo harsh working condition of the screw conveyor. It not only causes great wear on the screw shaft, but also causes great damage to the motor. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a raw material transfer device and transfer method for processing kraft tubes, so as to solve the technical problems mentioned in the background above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a raw material transfer device for processing kraft tubes, comprising a cylinder, a main feed inlet at the top of the cylinder and a discharge inlet at the bottom of the cylinder, a drive shaft rotatably connected inside the cylinder, the drive shaft being connected to a drive device, a secondary helical blade at the outer end of the drive shaft near the main feed inlet, a first disc and a second disc rotatably connected at both ends of the drive shaft, a main helical blade disposed between the first disc and the second disc, the main helical blade being sleeved on the outside of the secondary helical blade, a first through groove and a second through groove being formed on the inner side of the main helical blade, the diameter of the second through groove being larger than the diameter of the first through groove, the first through groove matching the drive shaft, the second through groove matching the secondary helical blade, a gear ring being disposed on the inner side of the second disc, the gear ring and the drive shaft being connected by a gear set for transmission, so that the secondary helical blade and the main helical blade are driven in the same direction with reduced speed.

[0007] By adopting the above technical solution, a set of auxiliary spiral blades for rapid material feeding is set inside the main spiral blades, which can reduce the negative impact of excessive material filling rate. The main spiral blades are used for material conveying in the traditional sense. The auxiliary spiral blades are coaxially installed with the main spiral blades and located at one end of the feed inlet. By setting up a gear set and other structures, the rotation speed of the auxiliary spiral blades is faster than that of the main spiral blades. When material is added through the hopper, the feed inlet is filled with material in a short time. At this time, the auxiliary spiral blades rotate faster and can push the material around them, that is, push the material inside the main spiral blades to the front, which plays the role of spreading the material forward, thereby reducing the pressure on the main spiral blades.

[0008] The invention is further configured such that the first disk and the second disk are used to support and install the main helical blade, the diameter of the main helical blade matches the inner wall diameter of the cylinder, and the first disk, the second disk and the inner wall of the cylinder are rotatably connected.

[0009] Preferably, by setting a first disk and a second disk to support and install the main helical blade, the rotation and operation of the main helical blade are made more stable.

[0010] The present invention is further configured such that the interior of the transmission shaft is hollow, and multiple sets of exhaust grooves are formed on the outer wall of the transmission shaft, the inclination direction of the exhaust grooves matching the rotation direction of the transmission shaft.

[0011] Preferably, by setting an exhaust trough, hot air in the air inlet pipe can be discharged through the exhaust trough to dry the material. The exhaust trough is set at an angle. If the drive shaft rotates counterclockwise, the exhaust trough will be set to tilt clockwise, which can reduce the amount of material entering the exhaust trough.

[0012] The present invention is further configured such that an air inlet pipe is provided inside the transmission shaft, the air inlet pipe is connected to the drying device, the two ends of the air inlet pipe are fixedly connected to the outer wall of the cylinder by a bracket, and the outer wall of the air inlet pipe has multiple sets of exhaust holes.

[0013] Preferably, by setting up an air inlet pipe, hot air from the drying device in the kraft tube processing process can be transported into the air inlet pipe to keep the screw conveyor continuously dry and also to prevent the material from getting damp.

[0014] The present invention is further configured such that a secondary feeding assembly is provided at the top of the cylinder, the secondary feeding assembly including a secondary feeding port connected to the outer wall of the cylinder, the secondary feeding port being used to add auxiliary materials.

[0015] Preferably, by setting up a secondary feeding component for the research of new products, different proportions of auxiliary materials can be added as needed.

[0016] The present invention is further configured such that the outer wall of the secondary feed port is provided with two sets of guide rods, each set of guide rods is sleeved with a spring, and a blocking plate is movably installed on the outside of the two sets of guide rods, the blocking plate being movably installed inside the secondary feed port.

[0017] Preferably, a guide rod and a spring are provided so that the blocking plate can be closed and opened.

[0018] The invention is further configured such that the blocking plate is inclined and a lever is provided at the bottom of the blocking plate, so that the lever can be periodically squeezed and impacted when the main spiral blade rotates.

[0019] Preferably, by tilting the blocking plate and installing a lever, the rotation of the main spiral blades can automatically open the blocking plate periodically, thereby allowing the auxiliary material to be added evenly into the cylinder.

[0020] A method for transferring raw materials in a raw material transfer device for processing kraft tubes, the process comprising the following steps: S1: First, the staff adds the material to be conveyed into the main feed inlet and starts the drive device. The drive device drives the transmission shaft to rotate, and the transmission shaft drives the auxiliary helical blades outside it to rotate. The transmission shaft drives the second disc to rotate through the gear set and gear ring. The second disc drives the main helical blade connected to it to rotate, realizing the differential transmission of the auxiliary helical blades and the main helical blades in the same direction. S2: When the auxiliary spiral blade and the main spiral blade rotate simultaneously, the auxiliary spiral blade quickly spreads the material accumulated at the main feed port forward, reducing the load on the main spiral blade. In other words, it draws the material from the second channel of the main spiral blade into the first channel, thereby reducing the pressure on the main spiral blade. S3: At the same time, the drying component delivers hot air into the air inlet pipe and discharges it through the exhaust port. Then, the hot air is discharged through multiple sets of exhaust slots, which evenly dries the material. S4: Finally, the material moves inside the cylinder and is discharged from the discharge port.

[0021] In summary, the present invention has the following main beneficial effects: 1. This invention mitigates the negative impact of excessively high material filling rates by setting a set of auxiliary spiral blades inside the main spiral blades for rapid material feeding. The main spiral blades are used for traditional material conveying, while the auxiliary spiral blades are coaxially mounted with the main spiral blades and located at one end of the feed inlet. By setting gear sets and other structures, the rotation speed of the auxiliary spiral blades is faster than that of the main spiral blades. When material is added through the hopper, the feed inlet is filled in a short time. At this time, the faster rotation speed of the auxiliary spiral blades can push the surrounding material, that is, push the material inside the main spiral blades to the front, thus spreading the material forward and reducing the pressure on the main spiral blades.

[0022] 2. This invention provides an air inlet pipe inside the drive shaft that drives the spiral blades to rotate, allowing hot air for drying to be introduced. The rotation of the drive shaft enables differential rotation of the main and auxiliary spiral blades. The hollow design of the drive shaft allows the air inlet pipe to pass through its interior. Multiple exhaust holes are distributed on the circumferential side of the air inlet pipe, and multiple exhaust grooves matching the rotation direction are opened on the circumferential side of the drive shaft. When the drive shaft rotates, the tilted exhaust grooves, with their rotation direction and physical distribution structure, can reduce the amount of material entering the drive shaft. Furthermore, the hot air can blow out any material that accidentally enters the shaft.

[0023] 3. By setting up a secondary feeding component that acts on the main spiral blade, the present invention can make the addition of auxiliary materials more uniform. The secondary feeding component operates in a step-by-step prying manner. During the rotation of the main spiral blade, the edge of the blade periodically pries and impacts the pry bar of the secondary feeding component. Under the reset action of the spring, the blocking plate of the secondary feeding component opens periodically, so that the auxiliary materials added into the secondary feeding port can be added periodically and uniformly, thereby improving the tempering effect of the main material and auxiliary materials. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the cylinder in this invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the image; Figure 4 This is a schematic diagram showing the distribution of the drive shaft, the first helical blade, and the second helical blade in this invention. Figure 5 For the present invention Figure 4 Enlarged view of point B in the image; Figure 6 This is a schematic diagram showing the distribution of the first disk, the second disk, and the second helical blade in this invention; Figure 7 This is a schematic diagram showing the distribution of the first and second through slots of the second helical blade in this invention. Figure 8 This is a schematic diagram showing the distribution of the drive shaft, the first spiral blade, and the exhaust groove in this invention; Figure 9 This is a schematic diagram showing the distribution of the air intake pipe and exhaust port in this invention; Figure 10 This is a schematic diagram showing the distribution of the air intake pipe, exhaust port, and exhaust groove in this invention.

[0025] Explanation of reference numerals in the attached figures: 1. Cylinder; 2. Drive shaft; 3. Secondary helical blade; 4. First disc; 5. Second disc; 6. Main helical blade; 7. First through slot; 8. Second through slot; 9. Gear ring; 10. Gear set; 11. Drive unit; 12. Bracket; 13. Air inlet pipe; 14. Exhaust port; 15. Exhaust groove; 16. Main feed inlet; 17. Feed outlet; 18. Secondary feed assembly; 1801. Secondary feed inlet; 1802. Guide rod; 1803. Spring; 1804. Blocking plate; 1805. Lever. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of the present invention will now be described.

[0028] A raw material transfer device for processing kraft tubes, please refer to 1- Figure 10The device includes a cylinder 1, with a main feed inlet 16 at the top for adding high-density polyethylene granules, and a discharge outlet 17 at the bottom for discharging materials. The cylinder 1 can be connected to an extruder via an extension tube and a corrugated tube. A drive shaft 2 is rotatably connected inside the cylinder 1, and a drive unit 11 is connected to the drive shaft 2. The drive unit 11 includes a three-phase motor, a drive belt assembly, and a gearbox. A secondary helical blade 3 is located at one end of the drive shaft 2 near the main feed inlet 16. A first disc 4 and a second disc 5 are rotatably connected to both ends of the drive shaft 2. A main helical blade 6 is positioned between the first disc 4 and the second disc 5, sleeved around the secondary helical blade 3. A first through groove 7 and a second through groove are formed on the inner side of the main helical blade 6. 8. The diameter of the second through groove 8 is larger than that of the first through groove 7. The first through groove 7 is matched with the drive shaft 2, and a certain gap is maintained to ensure smooth material passage. The second through groove 8 is matched with the auxiliary spiral blade 3 to ensure that the auxiliary spiral blade 3 has sufficient installation gap and also to ensure material flow. A gear ring 9 is provided on the inner side of the second disc 5. The gear ring 9 and the drive shaft 2 are connected by a gear set 10, so that the auxiliary spiral blade 3 and the main spiral blade 6 are driven in the same direction with reduced speed. When material is added through the main feed port 16, the material fills the main feed port 16 in a short time. At this time, the auxiliary spiral blade 3 rotates faster and can push the material around it, that is, push the material inside the main spiral blade 6 to the front, which plays the role of spreading the material forward, thereby reducing the pressure on the main spiral blade 6.

[0029] Please see Figure 2 The first disk 4 and the second disk 5 are used to support and install the main helical blade 6. The diameter of the main helical blade 6 matches the inner wall diameter of the cylinder 1, and the first disk 4, the second disk 5 and the inner wall of the cylinder 1 are rotatably connected. By setting the first disk 4 and the second disk 5 to support and install the main helical blade 6, the rotation of the main helical blade 6 is made more stable.

[0030] Please see Figure 10 The drive shaft 2 is hollow inside, and multiple exhaust grooves 15 are opened on the outer wall of the drive shaft 2. The inclination direction of the exhaust grooves 15 matches the rotation direction of the drive shaft 2. By setting the exhaust grooves 15, the hot air in the air inlet pipe 13 can be discharged through the exhaust grooves 15 to dry the material. The exhaust grooves 15 are set at an inclination. If the drive shaft 2 is set to rotate counterclockwise, the exhaust grooves 15 will be set to rotate clockwise, which can reduce the amount of material entering the exhaust grooves 15.

[0031] Please see Figure 2 and Figure 9The drive shaft 2 is equipped with an air inlet pipe 13, which is connected to the drying device. The two ends of the air inlet pipe 13 are fixedly connected to the outer wall of the cylinder 1 by the bracket 12. The outer wall of the air inlet pipe 13 has multiple sets of exhaust holes 14. By setting the air inlet pipe 13, the hot air from the drying device in the carbide tube processing process can be transported into the air inlet pipe 13 to keep the screw conveyor continuously dry and also to prevent the material from getting damp.

[0032] Please see Figure 3 The top of the cylinder 1 is provided with a secondary feeding assembly 18. The secondary feeding assembly 18 includes a secondary feeding port 1801 connected to the outer wall of the cylinder 1. The secondary feeding port 1801 can be used to add auxiliary materials. By setting the secondary feeding assembly 18 for the research of new products, auxiliary materials with different proportions can be added as needed.

[0033] Please see Figure 3 The outer wall of the secondary feed port 1801 is provided with two sets of guide rods 1802. Springs 1803 are sleeved on the outside of the two sets of guide rods 1802, and a blocking plate 1804 is movably installed on the outside of the two sets of guide rods 1802. The blocking plate 1804 is movably installed inside the secondary feed port 1801. By setting the guide rods 1802 and the springs 1803, the blocking plate 1804 can be closed and opened.

[0034] Please see Figure 3 The blocking plate 1804 is inclined, and a lever 1805 is provided at the bottom of the blocking plate 1804. When the main spiral blade 6 rotates, it can periodically squeeze and impact the lever 1805. By setting the blocking plate 1804 inclined and installing the lever 1805, the rotation of the main spiral blade 6 can automatically realize the periodic opening of the blocking plate 1804, thereby allowing the auxiliary material to be added evenly into the cylinder.

[0035] A method for transferring raw materials in a raw material transfer device for processing kraft tubes, the process comprising the following steps: S1: First, the staff adds the material to be conveyed into the main feed inlet 16 and starts the drive device 11. The drive device 11 drives the transmission shaft 2 to rotate, and the transmission shaft 2 drives the auxiliary spiral blade 3 outside it to rotate. The transmission shaft 2 drives the second disk 5 to rotate through the gear set 10 and the gear ring 9. The second disk 5 drives the main spiral blade 6 connected to it to rotate, so as to realize the synchronous and decelerated transmission of the auxiliary spiral blade 3 and the main spiral blade 6. S2: When the auxiliary spiral blade 3 and the main spiral blade 6 rotate simultaneously, the auxiliary spiral blade 3 quickly spreads the material accumulated in the main feed port 16 forward, reducing the load on the main spiral blade 6. That is, the material in the second channel 8 of the main spiral blade 6 is pumped into the first channel 7, thereby reducing the pressure on the main spiral blade 6. S3: At the same time, the drying component delivers hot air into the air inlet pipe 13 and discharges it through the exhaust port 14. Then the hot air is discharged through multiple sets of exhaust slots 15, which evenly dries the material. S4: Finally, the material moves inside the cylinder 1 and is discharged from the discharge port 17.

[0036] The working principle of this invention is as follows: When a screw conveyor is used to transport raw materials for processing corrugated tubing, such as high-density polyethylene granules, workers use a crane to add the material in a ton bag into the main feed inlet 16, start the drive device 11, drive device 11 drives the transmission shaft 2 to rotate, the transmission shaft 2 drives the auxiliary screw blades 3 on its outside to rotate, and the transmission shaft 2 drives the gear ring 9 to rotate through the gear set 10, the gear ring 9 drives the second disc 5 connected to it to rotate, the second disc 5 drives the main screw blades 6 on its side to rotate, and the gear set 10 and the gear ring 9... The transmission is combined into a co-directional differential transmission, so the auxiliary helical blade 3 and the main helical blade 6 rotate in the same direction, but the rotation speed of the auxiliary helical blade 3 is faster than that of the main helical blade 6. The rotation of the auxiliary helical blade 3 draws the material distributed inside the main helical blade 6 to the end of the auxiliary helical blade 3. The reduction ratio between the main and auxiliary helical blades can be set to 1:1.5~2.0. The auxiliary helical blade 3 rotates at a higher speed, which means that the material distributed in the second channel 8 is drawn into the first channel 7. At the same time, the main helical blade 6 also rotates to convey the material below the main feed inlet 16.

[0037] The drying equipment in the Krah tube processing technology leads out a hot air pipe connected to the air inlet pipe 13. The hot air is then evenly distributed through the multiple exhaust holes 14 of the air inlet pipe 13. When the drive shaft 2 rotates outside the air inlet pipe 13, the direction of the exhaust groove 15 is inclined in accordance with the rotation direction of the drive shaft 2, which can reduce the material splashing into the drive shaft 2. When the hot air is discharged through the exhaust groove 15, it can blow out any material particles that are accidentally splashed in, and also reduce the material splashing in. Finally, the material is discharged from the discharge port 17 after being conveyed.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A raw material transfer device for processing kraft tubes, comprising a cylinder (1), characterized in that: The top of the cylinder (1) is provided with a main feed inlet (16), and the bottom of the cylinder (1) is provided with a discharge outlet (17). The cylinder (1) is rotatably connected to a drive shaft (2), which is connected to a drive device (11). The outer end of the drive shaft (2) near the main feed inlet (16) is provided with a secondary helical blade (3). The two ends of the drive shaft (2) are respectively rotatably connected to a first disc (4) and a second disc (5). A main helical blade (6) is provided between the first disc (4) and the second disc (5). The main helical blade (6) is fitted on the outside of the auxiliary helical blade (3). The inner side of the main helical blade (6) is provided with a first through groove (7) and a second through groove (8). The diameter of the second through groove (8) is larger than the diameter of the first through groove (7). The first through groove (7) matches the drive shaft (2), and the second through groove (8) matches the auxiliary helical blade (3). The inner side of the second disc (5) is provided with a gear ring (9). The gear ring (9) and the drive shaft (2) are connected by a gear set (10) so that the auxiliary helical blade (3) and the main helical blade (6) are driven in the same direction with reduced speed.

2. The raw material transfer device for processing kraft tubes according to claim 1, characterized in that: The first disk (4) and the second disk (5) are used to support the installation of the main helical blade (6). The diameter of the main helical blade (6) matches the inner wall diameter of the cylinder (1), and the first disk (4), the second disk (5) and the inner wall of the cylinder (1) are rotatably connected.

3. The raw material transfer device for processing kraft tubes according to claim 1, characterized in that: The drive shaft (2) is hollow inside, and multiple sets of exhaust grooves (15) are opened on the outer wall of the drive shaft (2). The inclination direction of the exhaust grooves (15) matches the rotation direction of the drive shaft (2).

4. The raw material transfer device for processing kraft tubes according to claim 1, characterized in that: The transmission shaft (2) is provided with an air inlet pipe (13), which is connected to the drying device. The two ends of the air inlet pipe (13) are fixedly connected to the outer wall of the cylinder (1) by a bracket (12). Multiple sets of exhaust holes (14) are opened on the outer wall of the air inlet pipe (13).

5. The raw material transfer device for processing kraft tubes according to claim 1, characterized in that: The top of the cylinder (1) is provided with a secondary feeding assembly (18), which includes a secondary feed port (1801) connected to the outer wall of the cylinder (1). The secondary feed port (1801) can be used to add auxiliary materials.

6. A raw material transfer device for processing kraft tubes according to claim 5, characterized in that: The outer wall of the secondary feed inlet (1801) is provided with two sets of guide rods (1802), and springs (1803) are sleeved on the outside of the two sets of guide rods (1802). A blocking plate (1804) is movably installed on the outside of the two sets of guide rods (1802), and the blocking plate (1804) is movably installed inside the secondary feed inlet (1801).

7. A raw material transfer device for processing kraft tubes according to claim 6, characterized in that: The blocking plate (1804) is inclined and a lever (1805) is provided at the bottom of the blocking plate (1804). When the main spiral blade (6) rotates, it can periodically squeeze and impact the lever (1805).

8. A method for transferring raw materials for processing kraft tubes, characterized in that... The process of using a raw material transfer device for processing kraft tubes according to any one of claims 1-7 includes the following steps: S1: First, the staff adds the material to be conveyed into the main feed inlet (16) and starts the drive device (11). The drive device (11) drives the transmission shaft (2) to rotate. The transmission shaft (2) drives the auxiliary helical blade (3) outside it to rotate. The transmission shaft (2) drives the second disc (5) to rotate through the gear set (10) and the gear ring (9). The second disc (5) drives the main helical blade (6) connected to it to rotate, so as to realize the differential transmission of the auxiliary helical blade (3) and the main helical blade (6) in the same direction. S2: When the auxiliary spiral blade (3) and the main spiral blade (6) rotate simultaneously, the auxiliary spiral blade (3) quickly spreads the material accumulated in the main feed port (16) forward, reducing the load on the main spiral blade (6), that is, it draws the material in the second channel (8) of the main spiral blade (6) into the first channel (7), thereby reducing the pressure on the main spiral blade (6). S3: At the same time, the drying component delivers hot air into the air inlet pipe (13) and discharges it through the exhaust port (14). Then the hot air is discharged through multiple sets of exhaust grooves (15) to dry the material evenly. S4: Finally, the material moves inside the cylinder (1) and is discharged from the discharge port (17).

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