A polycarbonate pelletizing dryer that is easy to clean

Abstract

The utility model relates to the technical field of pellet dryer, and disclose a polycarbonate pellet dryer convenient to clean, including machine body, be provided with drain pipe and hot -blast system on the machine body, the bottom fixed mounting of machine body has the blanking tube, the fixed mounting of hollow ring is established on the machine body, inlaying installation has the water delivery pipe on the hollow ring, install electric control ball valve on the water delivery pipe, four corners of hollow ring all are through machine body and fixedly install the delivery pipe, four delivery pipes all are linked together with hollow ring, and equidistant inlaying installation has the atomizing nozzle on the delivery pipe. The utility model not only guarantees the thoroughness of side wall cleaning, more greatly avoids the blockage and damage of nozzle, improves work efficiency, reduces manual intervention, prolongs the service life of equipment simultaneously, reduces the maintenance cost, embodies the development trend of modern industrial equipment intellectualization, automation.

Description

Technical Field

[0001] This utility model relates to the field of pellet dryer technology, specifically a polycarbonate pellet dryer that is easy to clean. Background Technology

[0002] Polycarbonate (PC) is an important engineering plastic, widely used in electronics, automobiles, construction, medical devices, and optical products due to its excellent mechanical properties, transparency, heat resistance, and dimensional stability. During the production of polycarbonate, the pellets typically contain surface moisture or adsorbed water. If this moisture is not effectively removed, it will lead to material degradation, bubbles, silver streaks, and other defects during subsequent melt processing (such as injection molding and extrusion), severely affecting the appearance quality and mechanical properties of the final product. Therefore, drying polycarbonate pellets is an indispensable and crucial step in its production process.

[0003] However, existing equipment has the following problems during use: During the polycarbonate (PC) pelletizing process, the resulting fine powder enters the dryer along with the finished pellets for dehydration. Most of this fine powder is returned to the water tank with the process water and retained by the filter cloth, but a certain proportion is thrown to the dryer wall by the centrifugal force generated by the high-speed rotation of the dryer and gradually accumulates. This accumulated powder not only significantly reduces the dryer's heat transfer efficiency and dehydration performance but may also cause blockage of the airflow channels, further affecting the drying effect. If not cleaned in time, the dryer will trigger the system protection mechanism due to severe internal material accumulation, causing a "shutdown" and resulting in production interruption and the generation of a large amount of unusable lumpy waste.

[0004] Furthermore, because the dryer uses a non-isolated, integrated structure, online cleaning or rapid isolation maintenance is not possible, requiring weekly shutdowns for manual, comprehensive powder cleaning. This frequent unplanned shutdown severely restricts the continuity and stability of the production line, while significantly increasing waste output, energy consumption, and equipment maintenance costs, resulting in a sustained negative impact on overall production efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an easy-to-clean polycarbonate pellet dryer that significantly reduces maintenance frequency and cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A polycarbonate pellet dryer that is easy to clean includes a body, a drain pipe and a hot air system on the body, a feed pipe fixedly installed at the bottom of the body, a hollow ring fixedly installed on the body, a water supply pipe embedded in the hollow ring, an electrically controlled ball valve installed on the water supply pipe, and conveying pipes fixedly installed through the four corners of the hollow ring, all of which are connected to the hollow ring and have atomizing nozzles embedded at equal intervals on them.

[0008] Preferably, four protective blocks are fixedly installed inside the machine body, and the atomizing nozzles are all located inside the corresponding protective blocks. The protective blocks are provided with equally spaced exposure slots that are adapted to the atomizing nozzles. Each protective block is provided with a shielding mechanism, and a driving mechanism is provided inside the machine body.

[0009] Preferably, the shielding mechanism includes a connecting rod, which is slidably mounted on the protective block, and shielding plates are fixedly mounted on the connecting rod at equal intervals, the shielding plates being adapted to the exposure groove.

[0010] Preferably, the driving mechanism includes a sliding ring and a fixed plate. The sliding ring is slidably mounted on the protective block. The four corners of the sliding ring are fixedly connected to the corresponding connecting rods. There are two fixed plates, which are installed between adjacent protective blocks. Two ear blocks are fixedly mounted on the sliding ring. An electric telescopic rod is provided on both fixed plates, and the other end of the electric telescopic rod is fixedly mounted on the ear block.

[0011] Preferably, a drive motor is provided on the machine body, the output end of the drive motor passes through the bracket and is fixedly installed on the mounting circular plate, a rotating cylinder is fixedly installed on the mounting circular plate, the bottom of the rotating cylinder is inverted frustum shape, and a discharge pipe is fixedly installed at the bottom of the rotating cylinder, the discharge pipe is adapted to the feeding pipe.

[0012] Preferably, a bracket is fixedly installed on the machine body, and casters are inlaid around the bottom of the bracket.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model relates to a cleaning system consisting of a hollow ring, a delivery pipe, and equidistant atomizing nozzles. By precisely adjusting the nozzle angle, it can achieve full-coverage rinsing of the machine's side walls without any blind spots, removing dust and residue from the inner walls. Simultaneously, a protective mechanism, driven by an electrically telescopic rod, drives a baffle plate to tightly seal the nozzles during drying, effectively isolating the impact of pelletizing particles and dust intrusion. Combined with a sealing gasket design, the protection level is elevated to dustproof. This not only ensures thorough cleaning of the side walls but also greatly reduces nozzle clogging and damage, significantly lowering maintenance frequency and costs, and guaranteeing the long-term stable and reliable operation of the cleaning system. Attached Figure Description

[0015] Figure 1A schematic diagram of a polycarbonate pellet dryer that is easy to clean, as proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a polycarbonate pellet dryer that is easy to clean, as proposed in this utility model.

[0017] Figure 3 This is a schematic diagram showing the installation position of a protective block for a polycarbonate pellet dryer that is easy to clean, as proposed in this utility model.

[0018] Figure 4 This is a schematic diagram showing the installation position of the atomizing nozzle of a polycarbonate pellet dryer that is easy to clean, as proposed in this utility model.

[0019] Figure 5 This is a schematic diagram of the drive mechanism for a polycarbonate pellet dryer that is easy to clean, as proposed in this utility model.

[0020] Figure 6 This is a schematic diagram showing the location of the exposed groove in a polycarbonate pellet dryer that is easy to clean, as proposed in this utility model.

[0021] In the diagram: 1. Bracket; 2. Casters; 3. Machine body; 4. Drain pipe; 5. Feed pipe; 6. Hot air system; 7. Drive motor; 8. Water supply pipe; 9. Electric ball valve; 10. Hollow ring; 11. Protective block; 12. Baffle plate; 13. Connecting rod; 14. Sliding ring; 15. Fixing plate; 16. Electric telescopic rod; 17. Ear block; 18. Mounting round plate; 19. Rotating cylinder; 20. Discharge pipe; 21. Conveying pipe; 22. Atomizing nozzle; 23. Exposed groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1 to 6A polycarbonate pellet dryer for easy cleaning includes a body 3, a drain pipe 4, and a hot air system 6. A feed pipe 5 is fixedly installed at the bottom of the body 3. The body 3 is the core structure of the entire equipment, used to contain the polycarbonate pellets to be dried and perform the drying operation. The hot air system 6 is the main drying unit, which starts during operation to introduce heated air into the body 3 to evaporate moisture from the surface of the pellets. The drain pipe 4, located below the body 3, discharges wastewater from the equipment, preventing water accumulation from affecting drying efficiency or damaging the equipment. The feed pipe 5 is the outlet for the dried material, and a control valve is installed on the feed pipe 5. The dried pellets are discharged through this pipe under gravity, entering the next process or a collection container. Since this part is prior art, it will not be described in detail here.

[0024] A hollow ring 10 is fixedly installed on the body 3. A water supply pipe 8 is embedded in the hollow ring 10. An electric ball valve 9 is installed on the water supply pipe 8. Each of the four corners of the hollow ring 10 passes through the body 3 and is fixedly installed with a delivery pipe 21. All four delivery pipes 21 are connected to the hollow ring 10, and atomizing nozzles 22 are embedded at equal intervals on the delivery pipes 21.

[0025] This part constitutes the equipment's cleaning system. Water supply pipe 8 is connected to an external water source (such as industrial water or clean water), and electrically controlled ball valve 9 serves as the main switch for the water circuit, automatically controlled by the equipment's control system. When cleaning is required, the control system opens the electrically controlled ball valve 9, allowing clean water to enter the hollow ring 10 and then be distributed into four delivery pipes 21, finally being sprayed out in atomized form from equidistantly distributed atomizing nozzles 22. The atomized water droplets can cover a larger area, resulting in high water efficiency, and are used to wet and rinse dust and residue from the inner wall of the machine body 3.

[0026] It is worth noting that during the equipment installation or maintenance phase, the spray angle and direction of each atomizing nozzle 22 must be carefully adjusted according to the actual size and internal structure of the machine body 3 to ensure that the spray range of all nozzles overlaps with each other, ultimately achieving 360° coverage of the entire inner wall of the machine body 3 without dead angles. This is a key step to ensure a thorough cleaning effect. If the coverage is incomplete, some areas will gradually accumulate dirt because they cannot be rinsed. The installation position in the figure is only for illustration.

[0027] like Figure 2 , Figure 3 As shown, four protective blocks 11 are fixedly installed inside the body 3. The atomizing nozzles 22 are all located inside the corresponding protective blocks 11. The protective blocks 11 are provided with exposed slots 23 that are adapted to the atomizing nozzles 22 at equal intervals. Each protective block 11 is provided with a shielding mechanism. The bracket 1 is provided with a driving mechanism.

[0028] The main function of the protective block 11 is to protect the fragile atomizing nozzle 22 from direct impact and friction from a large amount of plastic pellets during the drying process, preventing damage or blockage. The exposed slot 23 ensures that the water mist can be sprayed smoothly in the cleaning mode. The shielding mechanism is used to close the exposed slot 23 during non-cleaning periods (i.e., during the drying process), while the drive mechanism provides power to control the opening and closing of the shielding mechanism. These designs together ensure that the atomizing nozzle 22 can work stably for a long time in harsh industrial environments.

[0029] like Figure 5 As shown, the shielding mechanism includes a connecting rod 13, which is slidably mounted on the protective block 11. A shielding plate 12 is fixedly mounted on the connecting rod 13 at equal intervals, and the shielding plate 12 is adapted to the exposure groove 23.

[0030] When drying is in progress, the baffle 12 slides via the connecting rod 13 under the drive mechanism, completely covering the exposed groove 23, effectively preventing plastic dust and granules from entering the protective block 11, thus protecting the nozzle of the atomizing nozzle 22 from clogging. When cleaning is required, the drive mechanism moves in the opposite direction, causing the baffle 12 to move away, opening the exposed groove 23, and allowing the atomized water mist to be sprayed out.

[0031] It is worth noting that, in order to improve the protective effect, a sealing gasket made of rubber, silicone or other materials can be installed between the contact surfaces of the shield 12 and the protective block 11 to form an airtight soft seal. This can more effectively prevent extremely fine dust from penetrating through mechanical gaps, upgrading the protection level from "anti-large particles" to "anti-dust", and greatly extending the effective maintenance cycle of the atomizing nozzle 22.

[0032] like Figure 5 As shown, the drive mechanism includes a sliding ring 14 and a fixed plate 15. The sliding ring 14 is slidably mounted on the protective block 11. The four corners of the sliding ring 14 are fixedly connected to the corresponding connecting rods 13. There are two fixed plates 15, which are installed between adjacent protective blocks 11. Two lugs 17 are fixedly mounted on the sliding ring 14. Each of the two fixed plates 15 is provided with an electric telescopic rod 16, and the other end of the electric telescopic rod 16 is fixedly mounted on the lug 17.

[0033] The electric telescopic rod 16 is the power source. After receiving the electrical signal from the control system, it performs the telescopic action. Its telescopic movement pushes the ear block 17 connected to it, thereby causing the entire sliding ring 14 to slide up and down along the protective block 11. Since the four corners of the sliding ring 14 are fixedly connected to the four connecting rods 13 respectively, the action of one electric telescopic rod 16 can synchronously control the four corner baffles 12 to open or close simultaneously, ensuring the consistency and reliability of the action.

[0034] like Figure 2 , Figure 3As shown, a drive motor 7 is provided on the machine body 3. The output end of the drive motor 7 passes through the bracket 1 and is fixedly installed on the mounting circular plate 18. A rotating cylinder 19 is fixedly installed on the mounting circular plate 18. The bottom of the rotating cylinder 19 is inverted frustum shape, and a discharge pipe 20 is fixedly installed at the bottom of the rotating cylinder 19. The discharge pipe 20 is compatible with the discharge pipe 5.

[0035] Wet polycarbonate pellets are fed into the rotating drum 19 inside the machine body 3. The equipment is started, and the drive motor 7 begins operation, driving the mounting plate 18 and the rotating drum 19 to rotate together. Simultaneously, the hot air system 6 starts, continuously supplying dry hot air into the machine body 3. As the rotating drum 19 rotates, the material (pellets) inside is lifted to the top of the drum wall under centrifugal force, and then continuously tumbles and scatters downwards under gravity, forming a uniform "waterfall flow." This vigorous tumbling motion achieves two key objectives: First, it greatly increases the contact area: the material is fully dispersed, and the surface area of ​​each pellet is exposed to the hot air to the maximum extent, avoiding the drying dead zones formed by material accumulation. Second, the high-speed flowing hot air makes full contact with the vigorously moving wet pellets, efficiently transferring heat energy to the material, causing the surface moisture to evaporate rapidly and be carried away by the airflow.

[0036] The evaporated moisture mixes with the hot air and is eventually discharged through the relevant exhaust port of the equipment (located at the top) or processed by the recycling system. After drying, the discharge pipe 20 at the bottom of the rotating drum 19 cooperates with the discharge pipe 5 at the bottom of the machine body 3 to smoothly discharge the dried pellets, completing the entire drying cycle.

[0037] like Figure 1 As shown, a bracket 1 is fixedly installed on the body 3, and casters 2 are inlaid around the bottom of the bracket 1.

[0038] The bracket 1 provides support and stability for the entire equipment, while the four casters 2 (which can be equipped with brakes) installed at the bottom greatly enhance the mobility of the equipment. This allows the equipment to be easily moved and positioned according to the layout adjustment needs of the production line, facilitating equipment placement, docking with other equipment, and removal for deep maintenance or cleaning when needed, thus increasing the flexibility of use.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polycarbonate pellet dryer that is easy to clean, comprising a body (3), a drain pipe (4) and a hot air system (6) provided on the body (3), and a feed pipe (5) fixedly installed at the bottom of the body (3), characterized in that, A hollow ring (10) is fixedly installed on the body (3). A water supply pipe (8) is embedded in the hollow ring (10). An electric ball valve (9) is installed on the water supply pipe (8). The four corners of the hollow ring (10) pass through the body (3) and are fixedly installed with a delivery pipe (21). The four delivery pipes (21) are all connected to the hollow ring (10), and atomizing nozzles (22) are embedded at equal intervals on the delivery pipes (21).

2. The easy-to-clean polycarbonate pellet dryer according to claim 1, characterized in that, Four protective blocks (11) are fixedly installed inside the body (3). The atomizing nozzles (22) are all located inside the corresponding protective blocks (11). The protective blocks (11) are provided with exposed slots (23) that are adapted to the atomizing nozzles (22) at equal intervals. Each protective block (11) is provided with a shielding mechanism. The body (3) is provided with a drive mechanism.

3. The easy-to-clean polycarbonate pellet dryer according to claim 2, characterized in that, The shielding mechanism includes a connecting rod (13), which is slidably mounted on the protective block (11). A shielding plate (12) is fixedly mounted on the connecting rod (13) at equal intervals, and the shielding plate (12) is adapted to the exposed groove (23).

4. The easy-to-clean polycarbonate pellet dryer according to claim 2, characterized in that, The drive mechanism includes a sliding ring (14) and a fixed plate (15). The sliding ring (14) is slidably mounted on the protective block (11). The four corners of the sliding ring (14) are fixedly connected to the corresponding connecting rods (13). There are two fixed plates (15). The fixed plates (15) are installed between adjacent protective blocks (11). Two ear blocks (17) are fixedly mounted on the sliding ring (14). Electric telescopic rods (16) are provided on both fixed plates (15). The other end of the electric telescopic rods (16) is fixedly mounted on the ear blocks (17).

5. The easy-to-clean polycarbonate pellet dryer according to claim 1, characterized in that, A drive motor (7) is installed on the machine body (3). The output end of the drive motor (7) passes through the bracket (1) and is fixedly installed on the mounting plate (18). A rotating cylinder (19) is fixedly installed on the mounting plate (18). The bottom of the rotating cylinder (19) is an inverted frustum shape, and a discharge pipe (20) is fixedly installed at the bottom of the rotating cylinder (19). The discharge pipe (20) is compatible with the discharge pipe (5).

6. The easy-to-clean polycarbonate pellet dryer according to claim 1, characterized in that, A bracket (1) is fixedly installed on the body (3), and casters (2) are inlaid around the bottom of the bracket (1).

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