Efficient drying pretreatment device for pet raw materials

Abstract

The utility model belongs to the technical field of high polymer material processing, and particularly relates to a pet raw material efficient drying pretreatment device which comprises an installation frame, a barrel and a hopper, the barrel is installed on the installation frame, the hopper is located at a feeding port of the barrel, an installation cover is installed at the bottom end of the hopper, and a rotating shaft is rotationally connected to the installation cover. Two protruding strips are fixedly connected to the exterior of the rotating shaft, a spring is fixedly connected into the mounting cover, a push plate is fixedly connected to the bottom end of the spring and slidably connected with the mounting cover and the hopper, the protruding strips abut against the bottom end of the push plate, and a stirring structure and a drying structure are mounted on the barrel. The two protruding strips are driven by the rotating shaft to rotate, the pushing plate is periodically pushed to slide upwards and abut against the material bag while the protruding strips rotate, the material bag is made to regularly shake, raw materials are promoted to effectively overcome adhesive force between the raw materials and the packaging bag and fall into the hopper, the automatic material shaking function of the device is achieved, and therefore the labor intensity of workers is reduced; and the use flexibility and convenience of the device are improved.

Description

Technical Field

[0001] This utility model belongs to the field of polymer material processing technology, specifically a high-efficiency drying and pretreatment device for PET raw materials. Background Technology

[0002] In the plastics processing industry, plastic drying mixers serve as crucial raw material pretreatment equipment. Through the synergistic effect of hot air circulation and mechanical agitation, they effectively remove moisture from plastic raw materials, providing qualified raw materials for subsequent injection molding, extrusion, and other molding processes. Modern plastic drying mixers typically employ the principle of hot air convection drying. A fan forces heated air into the mixing chamber, ensuring full contact between the hot air and the plastic particles, rapidly evaporating and removing surface moisture. Simultaneously, the equipment is equipped with a spiral agitator or multi-angled blades that optimize rotation speed for material tumbling, effectively preventing localized overheating and uneven drying, and significantly improving overall drying efficiency.

[0003] However, the feeding process of traditional plastic drying mixers suffers from significant operational bottlenecks. In actual operation, operators need to lift heavy raw material bags to the top of the hopper. To overcome the electrostatic attraction and frictional resistance between the raw material and the inner wall of the packaging bag, the bags are often repeatedly lifted and shaken to make the material fall. Since standard packaged plastic raw materials are generally quite heavy, this forced lifting and shaking operation not only places extremely high demands on the operator's physical strength but also results in low efficiency, severely impacting the smoothness of the entire production process. This design flaw directly leads to insufficient flexibility and ergonomics in the equipment's feeding process, necessitating urgent process improvement and equipment optimization. Utility Model Content

[0004] Based on this, this solution provides a high-efficiency drying and pretreatment device for PET raw materials, which realizes the automatic material shaking function of the device, thereby reducing the labor intensity of workers and improving the flexibility and convenience of the device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A high-efficiency drying and pretreatment device for PET raw materials includes a mounting frame, a cylindrical body mounted on the mounting frame, a hopper mounted on the mounting frame, the hopper being located at the feed inlet of the cylindrical body, a shaking structure on the hopper, the shaking structure including a mounting cover, the mounting cover being mounted at the bottom of the hopper, a rotating shaft rotatably connected to the mounting cover, two protruding strips fixedly connected to the outside of the rotating shaft, a spring fixedly connected inside the mounting cover, a push plate fixedly connected to the bottom end of the spring, the push plate being slidably connected to the mounting cover and the hopper, the protruding strips abutting against the bottom end of the push plate, and a stirring structure and a drying structure mounted on the cylindrical body.

[0007] Optionally, in one embodiment of the present invention, the cross-section of the protrusion is trapezoidal, and the two protrusions are symmetrically distributed about the center of the rotation axis.

[0008] Optionally, in one embodiment of the present invention, the overall cross-section of the push plate is T-shaped, and the top of the push plate is trapezoidal.

[0009] Optionally, in one embodiment of the present invention, an anti-detachment rod is fixedly connected inside the mounting cover, and the push plate is slidably connected to the anti-detachment rod.

[0010] Optionally, in one embodiment of the present invention, the anti-detachment rod has a "T" shaped cross-section, and a first motor is installed on the mounting cover, with the output shaft of the first motor fixedly connected to the rotating shaft.

[0011] Optionally, in one embodiment of the present invention, the stirring structure includes a spiral rod, which is rotatably connected inside the cylinder, and a lifting tube is sleeved on the outside of the spiral rod, and the lifting tube is fixedly connected to the cylinder.

[0012] Optionally, in one embodiment of the present invention, a second motor is mounted on the mounting bracket, and pulleys are fixedly connected to the output shaft of the second motor and the top end of the screw rod, with belts sleeved on the outside of the two pulleys.

[0013] Optionally, in one embodiment of the present invention, the drying structure includes a fan hood, the fan hood is welded to the outside of the lifting pipe, a duct is installed between the cylinder and the fan hood, and a hot air blower is installed at one end of the duct located outside the cylinder.

[0014] Optionally, in one embodiment of the present invention, the cylinder is provided with a return port, which is located directly above the hopper.

[0015] Compared with the prior art, the PET raw material high-efficiency drying pretreatment device provided by this utility model has the following characteristics:

[0016] A mounting cover is installed at the bottom of the hopper, and a rotating shaft is rotatably connected to the mounting cover. Two protruding strips are fixedly connected to the outside of the rotating shaft, and a spring is fixedly connected inside the mounting cover. A push plate is fixedly connected to the bottom of the spring, and the push plate is slidably connected to the mounting cover and the hopper. The protruding strips abut against the bottom of the push plate. The rotating shaft drives the two protruding strips to rotate. During the rotation, the protruding strips periodically push the push plate to slide down and abut against the material bag, causing the material bag to shake regularly. This process helps the raw material effectively overcome the adhesion between itself and the packaging bag and fall smoothly into the hopper, realizing the automatic material shaking function of the device, reducing the labor intensity of workers, and improving the ease of operation of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the screw rod and the lifting tube in Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the material shaking structure in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the mounting cover and the push plate in Embodiment 1 of this utility model.

[0022] Reference numerals in the attached drawings: 1. Mounting frame; 2. Cylinder; 3. Shaking structure; 301. Mounting cover; 302. Rotating shaft; 303. Protruding strip; 304. Spring; 305. Push plate; 306. Anti-detachment rod; 307. First motor; 4. Stirring structure; 401. Spiral rod; 402. Lifting pipe; 403. Pulley; 404. Belt; 405. Second motor; 5. Drying structure; 501. Air hood; 502. Air duct; 503. Hot air blower; 6. Return port; 7. Hopper. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0024] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] Example 1

[0026] Because existing plastic drying equipment is not convenient to operate and affects the smoothness of production, a high-efficiency drying and pretreatment device for PET raw materials was designed. The specific scheme is as follows:

[0027] like Figure 1-4 As shown, a high-efficiency drying and pretreatment device for PET raw materials includes a mounting frame 1, a cylinder 2 mounted on the mounting frame 1, and a hopper 7 mounted on the mounting frame 1. The hopper 7 is located at the feed inlet of the cylinder 2. The hopper 7 is provided with a shaking structure 3, which includes a mounting cover 301. The mounting cover 301 is mounted at the bottom of the hopper 7. A rotating shaft 302 is rotatably connected to the mounting cover 301. Two protrusions 303 are fixedly connected to the outside of the rotating shaft 302. A spring 304 is fixedly connected inside the mounting cover 301. A push plate 305 is fixedly connected to the bottom of the spring 304. The push plate 305 is slidably connected to the mounting cover 301 and the hopper 7. The protrusions 303 abut against the bottom of the push plate 305. The cross-section of the protrusions 303 is trapezoidal. The two protrusions 303 are symmetrically distributed about the center of the rotating shaft 302. A stirring structure 4 and a drying structure 5 are mounted on the cylinder 2.

[0028] The push plate 305 has a T-shaped cross-section and a trapezoidal top. An anti-detachment rod 306 is fixedly connected inside the mounting cover 301. The push plate 305 and the anti-detachment rod 306 are slidably connected. The T-shaped structure of the push plate 305 allows it to slide in conjunction with the anti-detachment rod 306, which enhances the stability of the push plate 305 during sliding and facilitates precise contact with the material bag to achieve efficient shaking. The T-shaped cross-section of the anti-detachment rod 306 effectively prevents the push plate 305 from slipping off the anti-detachment rod 306. A first motor 307 is installed on the mounting cover 301. The output shaft of the first motor 307 is fixedly connected to the rotating shaft of the rotating shaft 302. The first motor 307 drives the rotating shaft 302 to rotate, causing the rotating shaft 302 to rotate and periodically contact the push plate 305 to slide, thereby realizing the shaking function of the push plate 305.

[0029] A second motor 405 is installed on the mounting frame 1. The output shaft of the second motor 405 and the top of the screw rod 401 are both fixedly connected to pulleys 403. Belts 404 are sleeved on the outside of the two pulleys 403. The stirring structure 4 includes a screw rod 401. The screw rod 401 is rotatably connected inside the cylinder 2. A lifting pipe 402 is sleeved on the outside of the screw rod 401. The lifting pipe 402 is fixedly connected to the cylinder 2. The second motor 405 drives the screw rod 401 to rotate through the belt 404, causing the raw material to be conveyed upwards and scattered along the lifting pipe 402, realizing the stirring and lifting functions and promoting uniform drying of the raw material.

[0030] The drying structure 5 includes a hood 501. The hood 501 is welded to the outside of the lifting pipe 402. An air duct 502 is installed between the cylinder 2 and the hood 501. A hot air blower 503 is installed at one end of the air duct 502 outside the cylinder 2. The hot air blower 503 generates hot air, which is sent into the interlayer between the hood 501 and the lifting pipe 402 through the air duct 502. Then the hot air flows downward into the cavity of the cylinder 2, realizing efficient drying of the raw materials. At the same time, the opening of the hood 501 faces downward, which can prevent the raw materials from being sucked into the interlayer between the hood 501 and the lifting pipe 402.

[0031] The cylinder 2 is provided with a return port 6, which is located directly above the hopper 7. This allows the dried and stirred raw materials to fall back into the hopper 7 and form a circulation process, thereby improving the drying pretreatment effect.

[0032] Working principle:

[0033] During feeding, the material bag is first lifted onto the hopper 7, and then the first motor 307 is started. The output shaft of the first motor 307 drives the rotating shaft 302 to rotate. The rotation of the rotating shaft 302 drives the protruding strip 303 to rotate accordingly. When the protruding strip 303 rotates to the bottom of the push plate 305, the protruding strip 303 pushes the push plate 305 to slide upward along the anti-detachment rod 306, so that the top of the push plate 305 touches the material bag upward. The push plate 305 slides upward and at the same time touches the spring 304 to compress. When the protruding strip 303 rotates to no longer touch the push plate 305, the spring 304 resets and drives the push plate 305 to slide downward. Therefore, the cooperation between the protruding strip 303 and the spring 304 makes the push plate 305 maintain periodic upward sliding, thereby making the material bag vibrate regularly, causing the raw material to overcome the adhesion between the raw material and the packaging bag and fall into the hopper 7 automatically, further realizing automatic shaking. The operation is convenient and labor-saving, reducing the labor intensity of workers and enhancing the flexibility and convenience of the device.

[0034] When the raw material in hopper 7 slides to the feed inlet of cylinder 2, the second motor 405 is started. The output shaft of the second motor 405 drives the screw rod 401 in cylinder 2 to rotate through the transmission of pulley 403 and belt 404. As the screw rod 401 rotates, it conveys the raw material in hopper 7 upward along the lifting pipe 402. When the screw rod 401 lifts the raw material to the top of the lifting pipe 402, due to the centrifugal force generated by the rotation of the top of the screw rod 401 and the gravity of the material itself, the raw material will be thrown outward from the top opening of the lifting pipe 402. At the same time, the hot air blower 503 is started. The hot air generated by the hot air blower 503 is sent into the interlayer between the air hood 501 and the lifting pipe 402 through the air duct 502. Then the hot air flows downward and diffuses evenly into the cavity of cylinder 2 from the outlet at the bottom of the air hood 501, making full contact with the raw material and quickly removing the moisture from the raw material to achieve the drying process.

[0035] When further drying of the raw materials is required, the gate at the return port 6 is opened, allowing the raw materials inside the cylinder 2 to fall back into the cylinder 2 from the return port 6 through the hopper 7, and a new round of stirring and drying begins.

[0036] In the drying pretreatment device of this scheme, the hopper 7 is equipped with a rotating shaft 302 with a protrusion 303. The rotation of the rotating shaft 302 can move the push plate 305 upward. The push plate 305 is connected to a return spring. During the rotation, the protrusion 303 periodically causes the push plate 305 to slide upward and abut against the material bag, causing the material bag to vibrate regularly, so that the raw material falls smoothly into the hopper. This realizes the automatic material shaking function of the device, eliminating the need for workers to hold the material belt for a long time to pour out the raw material, improving the convenience of the device, and also ensuring the efficiency of the equipment.

[0037] Example 2

[0038] In this embodiment, the drying pretreatment device is basically the same as that in Embodiment 1. The difference is that, based on Embodiment 1, a spiral guide rib is provided on the inner wall of the lifting pipe 402 to extend the time for the material to pass through the lifting pipe 402 once, so as to ensure the drying effect.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pet raw material high-efficiency drying pretreatment device, comprising a mounting frame, characterized in that: The installation frame is provided with a barrel, a hopper is installed on the installation frame, the hopper is located at the feeding port of the barrel, a material shaking structure is arranged on the hopper, the material shaking structure comprises a mounting cover, the bottom end of the hopper is provided with the mounting cover, a rotating shaft is rotatably connected to the mounting cover, two convex strips are fixedly connected to the outer portion of the rotating shaft, a spring is fixedly connected to the mounting cover, the bottom end of the spring is fixedly connected with a push plate, the push plate is slidably connected with the mounting cover and the hopper, the convex strips abut against the bottom end of the push plate, a stirring structure and a drying structure are installed on the barrel.

2. The pet raw material high-efficiency drying pretreatment device according to claim 1, characterized in that: The cross section of the convex strip is in trapezoidal structure, and the two convex strips are symmetrically distributed about the center of the rotating shaft.

3. The pet raw material high-efficiency drying pretreatment device according to claim 1, characterized in that: The cross section of the push plate is in "T" shape structure, and the top end of the push plate is in trapezoidal structure.

4. The pet raw material high-efficiency drying pretreatment device according to claim 3, characterized in that: The mounting cover is fixedly connected with an anti-dropping rod, and the push plate is slidably connected with the anti-dropping rod.

5. The pet raw material high-efficiency drying pretreatment device according to claim 4, characterized in that: The cross section of the anti-dropping rod is in "T" shape structure, a first motor is installed on the mounting cover, and the output shaft of the first motor is fixedly connected with the rotating shaft.

6. The pet raw material high-efficiency drying pretreatment device according to claim 1, characterized in that: The stirring structure comprises a spiral rod, the spiral rod is rotatably connected in the barrel, and the outer portion of the spiral rod is provided with a lifting pipe.

7. The pet raw material high-efficiency drying pretreatment device according to claim 6, characterized in that: A second motor is installed on the installation frame, a belt pulley is fixedly connected with the top end of the spiral rod and the output shaft of the second motor, and the outer portions of the two belt pulleys are provided with a belt.

8. The pet raw material high-efficiency drying pretreatment device according to claim 6, characterized in that: The drying structure comprises a wind cover, the wind cover is welded to the outer portion of the lifting pipe, a wind pipe is installed between the barrel and the wind cover, and one end of the wind pipe located outside the barrel is provided with a hot air fan.

9. The pet raw material high-efficiency drying pretreatment device according to claim 1, characterized in that: The barrel is provided with a material returning port, and the material returning port is located directly above the hopper.

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