Cooling equipment for plastic production

Abstract

The utility model provides cooling equipment for plastic production, which relates to the technical field of plastic production and comprises a plastic extruding machine, a water cooling tank, a drying component, a filtering component and a closed-loop power system, the plastic extruding machine extrudes molten plastic into strip-shaped materials, and the water cooling tank quickly shapes the materials through circulating cooling water; the filtering assembly adopts a rough filtration and fine filtration two-stage structure to intercept plastic scraps and impurities in cooling water, and a detachable lifting handle and a waterproof valve are matched, so that the impurity removal rate is improved, and the water changing period is prolonged; the drying assembly integrates a heat pump evaporator, recovers waste heat of a water cooling tank and converts the waste heat into drying hot air, and the drying efficiency is improved. The power system intelligently adjusts the flow speed of cooling water through a circulating pump, the dynamic requirement for the drying temperature is met, and a waste heat-cooling collaborative optimization closed loop is formed. The equipment solves the problems of idle waste heat, water quality pollution and high consumption and low efficiency of low-temperature drying in the traditional process, reduces comprehensive energy consumption and maintenance cost, and is suitable for energy-saving and environment-friendly production of regenerated plastic granulation.

Description

Technical Field

[0001] This utility model relates to the field of plastic production technology, and in particular to a cooling device for plastic production. Background Technology

[0002] Plastic production is an industrial process that uses petroleum or biomass as raw materials to synthesize high molecular polymers through cracking and polymerization reactions. After being granulated into resin particles, the particles are then heated and shaped using molding technologies such as injection molding, extrusion, and blow molding. After cooling and shaping, surface treatment, and quality testing, the finished products are produced, along with environmentally friendly processes such as recycling and degradation.

[0003] In order to vigorously develop renewable resources and achieve environmental protection and recycling, waste plastics are crushed, washed, melted and granulated to produce new plastics. The core equipment for the production of recycled plastic pellets is the pelletizing unit, whose core component, the extruder, plasticizes the recycled resin into a molten state through a heating, extrusion and cooling system.

[0004] However, the cooling systems of existing plastic recycling pelletizing units have the following technical problems:

[0005] Waste heat is idle and energy consumption is high at low temperatures: The water cooling process of existing plastic recycling granulation units has the problem of residual condensate. Natural air drying in low-temperature environments is inefficient and leads to a decrease in granulation precision. Forced drying requires additional equipment, is complicated to operate and has high energy consumption. It is impossible to recover and reuse the waste heat of the water tank, and it is difficult to achieve the synergistic optimization of waste heat resource utilization and cooling.

[0006] 2) Water pollution: The water cooling tanks of the existing plastic recycling granulation units are not equipped with a filtration system. After long-term use, impurities accumulate and cause water pollution. Regular water replacement and additional manpower are required for maintenance, which increases operating costs.

[0007] Therefore, we propose a cooling device for plastic production to solve the problems mentioned above. Utility Model Content

[0008] This invention proposes a cooling device for plastic production. It completes the cooling water circulation purification and heat energy conversion through a waste heat recovery system integrating filter components and heat pump evaporators. Combined with multi-stage positioning components and dynamic drying components, it reduces impurities in the water-cooled tank and improves waste heat utilization. Furthermore, it achieves intelligent matching between cooling water flow rate and drying temperature through a closed-loop power system, thereby improving drying efficiency and reducing overall energy consumption in low-temperature environments, thus solving the problems mentioned in the background technology.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a cooling device for plastic production, including an extruder and a water cooling tank located on one side of the extruder's discharge port, a drying component installed at the other end of the water cooling tank, a filter component and a positioning component installed inside the water cooling tank, a power system provided on one side of the water cooling tank, and plastic strips rotatably connected between the positioning components;

[0010] The drying assembly includes a support frame, a water collection tank is installed at the upper end of the support frame, a heat pump evaporator is installed inside the water collection tank, an exhaust pipe is installed at the upper end of the heat pump evaporator, a ventilation pipe is installed at the top of the exhaust pipe, and multiple air outlets are connected to the upper part of the ventilation pipe.

[0011] The filter assembly includes a filter box, inside which a first filter plate and a second filter plate are installed in sequence. A first water inlet pipe is installed at the front end of the filter box. A set of grooves is provided on the top of the filter box, and a handle is installed in the set of grooves.

[0012] Preferably, sealing masks are installed at both ends of the ventilation pipe, and the sealing masks are fixedly installed on both sides of the water collection tank; the drying assembly also includes a steam hood, the two ends of which are fixedly installed on both sides of the water collection tank, and a set of rollers are evenly installed laterally inside the steam hood; the filter hole diameter of the first filter plate is larger than that of the second filter plate, a valve is installed on the first water inlet pipe, the valve is made of waterproof material, and a set of handles are detachably connected to the top of the first filter plate and the second filter plate respectively.

[0013] Preferably, the positioning component includes a first positioning plate and a second positioning plate. The first positioning plate and the second positioning plate are fixedly installed on the front and rear sides of the water cooling tank. There are two first positioning plates, which are located at the front and rear ends of the water cooling tank respectively. The upper ends of the two first positioning plates are rotatably connected to support rollers through bearings. There are multiple second positioning plates, which are located between the two first positioning plates. The lower ends of the multiple second positioning plates are rotatably connected to pressure rollers through bearings.

[0014] Preferably, the power system includes a circulating pump located outside the water-cooled tank. The inlet of the circulating pump is connected to an outlet pipe, and the other end of the outlet pipe passes through the side wall of the water-cooled tank and connects to the inside of the filter box. The outlet of the circulating pump is connected to an intermediate pipe, and the other end of the intermediate pipe is connected to the inlet of the heat pump evaporator. The power system also includes a second inlet pipe, one end of which is connected to the outlet of the heat pump evaporator, and the other end of which passes through the inside of the water-cooled tank.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. Waste heat resource utilization and low-temperature high-efficiency drying: Waste heat from the water-cooled tank is recovered by a heat pump evaporator and converted into a drying heat source. Combined with the multi-roller tumbling and guiding flow in the steam hood, the drying efficiency, waste heat utilization rate and overall energy efficiency ratio are improved in a low-temperature environment, and energy consumption is reduced.

[0017] 2. Long-term water purification and intelligent operation and maintenance: The coarse-fine dual-stage filtration system intercepts impurities, and the detachable handle and waterproof valve reduce the frequency of water changes and lower maintenance costs. Attached Figure Description

[0018] Figure 1 This utility model provides a front view perspective of a cooling device for plastic production.

[0019] Figure 2 This utility model provides a three-dimensional view of a water-cooled tank structure in a cooling device for plastic production;

[0020] Figure 3 This utility model provides a three-dimensional structural view of a filtration system in a cooling device for plastic production;

[0021] Figure 4 This utility model provides a partial three-dimensional view of a cooling device used in plastic production;

[0022] Figure 5 This utility model presents a three-dimensional structural view of a drying system in a cooling device for plastic production.

[0023] Legend: 1. Extruder; 2. Water-cooled tank; 3. Drying assembly; 301. Support frame; 302. Water collection tank; 303. Heat pump evaporator; 304. Exhaust pipe; 305. Ventilation pipe; 306. Sealing mask; 307. Air outlet duct; 308. Steam hood; 309. Roller; 4. Filter assembly; 401. Filter box; 402. First filter plate; 403. Second filter plate; 404. Handle; 405. First water inlet pipe; 406. Valve; 5. Positioning assembly; 501. First positioning plate; 502. Support roller; 503. Second positioning plate; 504. Pressure roller; 6. Power system; 601. Circulation pump; 602. Water outlet pipe; 603. Intermediate pipe; 604. Second water inlet pipe; 7. Plastic strip. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can also be implemented in other ways than those described herein, and therefore the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1, as Figures 1-5 As shown, this utility model provides a cooling device for plastic production: including an extruder 1 and a water cooling tank 2 located on one side of the discharge port of the extruder 1. A drying component 3 is installed at the other end of the water cooling tank 2. A filter component 4 and a positioning component 5 are installed inside the water cooling tank 2. A power system 6 is provided on one side of the outside of the water cooling tank 2. A plastic strip 7 is rotatably connected between the positioning components 5.

[0027] The drying assembly 3 includes a support frame 301, a water collection tank 302 is installed on the upper end of the support frame 301, a heat pump evaporator 303 is installed inside the water collection tank 302, an exhaust pipe 304 is installed on the upper end of the heat pump evaporator 303, a ventilation pipe 305 is installed at the top of the exhaust pipe 304, and multiple air outlets 307 are connected to the upper part of the ventilation pipe 305.

[0028] The filter assembly 4 includes a filter box 401, inside which a first filter plate 402 and a second filter plate 403 are installed in sequence. A first water inlet pipe 405 is installed at the front end of the filter box 401. A set of grooves is provided on the top of the filter box 401, and a handle 404 is installed in the set of grooves.

[0029] The overall effect of embodiment 1 is as follows: through the coordinated design of extruder 1, water cooling tank 2, drying component 3, filter component 4 and positioning component 5, the cooling water in water cooling tank 2 is purified and circulated through two-stage filtration. Waste heat is recovered and converted into drying heat source through heat pump evaporator 303. Combined with roller 309 and pressure roller 504 to precisely guide plastic strip 7, the problems of idle waste heat, water pollution and low-temperature drying efficiency are solved, achieving multiple effects such as energy saving and consumption reduction, long-term water quality cleanliness, increased water change cycle and stable operation in low-temperature environment.

[0030] Example 2, as Figure 4 , Figure 5 As shown, this utility model provides a cooling device for plastic production: sealing masks 306 are installed at both ends of the ventilation pipe 305, and the sealing masks 306 are fixedly installed on both sides of the water collection tank 302. The drying component 3 also includes a steam hood 308, the two ends of the steam hood 308 are fixedly installed on both sides of the water collection tank 302, and a set of rollers 309 are evenly installed laterally inside the steam hood 308.

[0031] The overall effect of embodiment 2 is as follows: by sealing the sealing masks 306 installed at both ends of the ventilation pipe 305 to prevent hot air from overflowing and cold air from entering, and by adding the rollers 309 evenly distributed laterally inside the steam hood 308, the plastic strip 7 can be rotated and heated at multiple angles, improving the uniformity of drying, while reducing heat loss and strengthening the sealing and dynamic drying efficiency of the waste heat recovery system.

[0032] Example 3, as Figure 3 As shown, this utility model provides a cooling device for plastic production: the diameter of the filter holes of the first filter plate 402 is larger than the diameter of the filter holes of the second filter plate 403, a valve 406 is installed on the first water inlet pipe 405, the valve 406 is made of waterproof material, and a set of handles 404 are respectively connected to the top of the first filter plate 402 and the second filter plate 403.

[0033] The overall effect of embodiment 3 is as follows: through the coarse-fine filtration dual-stage filtration structure, combined with valve 406 and detachable handle 404, large particulate impurities and micro-debris in the cooling water are intercepted in layers, which significantly reduces the risk of clogging of the filtration system and reduces the maintenance frequency. At the same time, the sealing performance of the first water inlet pipe 405 is improved to prevent leakage and ensure the long-term stable operation of the water cooling circulation system.

[0034] Example 4, as Figures 1-2 , Figures 4-5 As shown, this utility model provides a cooling device for plastic production: the positioning component 5 includes a first positioning plate 501 and a second positioning plate 503. The first positioning plate 501 and the second positioning plate 503 are fixedly installed on the front and rear sides of the water cooling tank 2. There are two first positioning plates 501, located at the front and rear ends of the water cooling tank 2 respectively. The upper ends of the two first positioning plates 501 are rotatably connected to a support roller 502 through a bearing. There are multiple second positioning plates 503, located between the two first positioning plates 501. The lower ends of the multiple second positioning plates 503 are connected to a support roller 502 through a bearing. The bearing is rotatably connected to the pressure roller 504; the power system 6 includes a circulation pump 601, which is located outside the water cooling tank 2. The inlet of the circulation pump 601 is connected to the outlet pipe 602, and the other end of the outlet pipe 602 passes through the side wall of the water cooling tank 2 and connects to the inside of the filter box 401. The outlet of the circulation pump 601 is connected to the intermediate pipe 603, and the other end of the intermediate pipe 603 is connected to the inlet of the heat pump evaporator 303. The power system 6 also includes a second inlet pipe 604, one end of which is connected to the outlet of the heat pump evaporator 303, and the other end passes through the inside of the water cooling tank 2.

[0035] The overall effect of embodiment 4 is as follows: by forming a multi-level positioning adjustment structure through the positioning component 5, and cooperating with the circulating pump 601 of the power system 6 to drive the cooling water through the outlet pipe 602 → filter box 401 → intermediate pipe 603 → heat pump evaporator 303 → second inlet pipe 604 to form a closed loop circulation, the transmission trajectory of the plastic strip 7 is precisely controlled and the cooling water flow rate is dynamically matched, thereby improving the cooling uniformity and system response efficiency, while reducing the frequency of manual adjustment.

[0036] The working principle of the entire device is as follows:

[0037] Extrusion and initial cooling stage: The molten plastic is extruded into plastic strips 7 and transported to the water cooling tank 2. The high-temperature plastic strips 7 are quickly shaped by circulating cooling water. The cooling water path is: the circulating pump 601 drives the water flow from the water cooling tank 2 → water outlet pipe 602 → filter assembly 4 → intermediate pipe 603 → heat pump evaporator 303 → second water inlet pipe 604 → back to the water cooling tank 2, forming a closed-loop cooling.

[0038] Water purification and circulation: The filter box 401 contains a first filter plate 402 with a larger pore size and a second filter plate 403 with a smaller pore size to intercept plastic debris and impurities. The handle 404 allows for quick disassembly of the filter plates for cleaning. The valve 406 controls the water flow through the first inlet pipe 405 to prevent backflow. The dual-stage filtration by the first filter plate 402 and the second filter plate 403 reduces water pollution, extends the water change cycle, and lowers maintenance costs.

[0039] Plastic strip positioning and guidance: The support roller 502 is fixed to the first positioning plate 501 by the bearing, supporting the horizontal movement of the plastic strip 7. The pressure roller 504 is installed below the second positioning plate 503, and presses the plastic strip 7 to prevent the plastic strip 7 from bending or floating, ensuring that the plastic strip 7 is smoothly conveyed in the water cooling tank 2 and the drying assembly 3, and avoiding deviation.

[0040] Waste heat recovery and intelligent drying: The heat pump evaporator 303 absorbs the waste heat of the water in the water-cooled tank 2, and transfers the heat to the drying system through the heat absorption of refrigerant evaporation. The heated air is delivered to the ventilation pipe 305 through the exhaust pipe 304 to form hot air, and then discharged through multiple evenly arranged air outlets 307 to dry the plastic strip 7 above the roller 309. The sealing mask 306 prevents heat loss and improves thermal efficiency.

[0041] Power and temperature control system: The 601 circulating pump provides the power for water circulation, with adjustable flow rate to match different production capacity requirements.

[0042] Energy consumption optimization is achieved by dynamically adjusting the hot air temperature and circulation pump power through the temperature sensor of the heat pump evaporator 303.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A cooling device for plastic production, comprising an extruder (1) and a water-cooling tank (2) located on one side of the discharge port of the extruder (1), characterized in that: A drying assembly (3) is installed at the other end of the water-cooled tank (2). A filter assembly (4) and a positioning assembly (5) are installed inside the water-cooled tank (2). A power system (6) is provided on the outer side of the water-cooled tank (2). A plastic strip (7) is rotatably connected between the positioning assemblies (5). The drying assembly (3) includes a support frame (301), a water collection tank (302) is installed on the upper end of the support frame (301), a heat pump evaporator (303) is installed inside the water collection tank (302), an exhaust pipe (304) is installed on the upper end of the heat pump evaporator (303), a ventilation pipe (305) is installed at the top of the exhaust pipe (304), and a plurality of air outlets (307) are connected to the upper part of the ventilation pipe (305). The filter assembly (4) includes a filter box (401), inside which a first filter plate (402) and a second filter plate (403) are installed in sequence. A first water inlet pipe (405) is installed at the front end of the filter box (401). A set of grooves is provided on the top of the filter box (401), and a handle (404) is installed in the set of grooves.

2. The cooling equipment for plastic production according to claim 1, characterized in that: The ventilation pipe (305) is sealed with sealing masks (306) at both ends, and the sealing masks (306) are fixedly installed on both sides of the water collection tank (302).

3. The cooling equipment for plastic production according to claim 1, characterized in that: The drying assembly (3) also includes a steam hood (308), the two ends of which are fixedly installed on both sides of the water collection tank (302), and a set of rollers (309) are evenly installed horizontally inside the steam hood (308).

4. The cooling equipment for plastic production according to claim 1, characterized in that: The diameter of the filter holes of the first filter plate (402) is larger than that of the filter holes of the second filter plate (403). A valve (406) is installed on the first water inlet pipe (405). The valve (406) is made of waterproof material. A set of handles (404) are respectively connected to the top of the first filter plate (402) and the second filter plate (403).

5. A cooling device for plastic production according to claim 1, characterized in that: The positioning component (5) includes a first positioning plate (501) and a second positioning plate (503). The first positioning plate (501) and the second positioning plate (503) are fixedly installed on the front and rear sides of the water cooling tank (2). There are two first positioning plates (501), which are located at the front and rear ends of the water cooling tank (2) respectively. The upper ends of the two first positioning plates (501) are rotatably connected to the support rollers (502) through bearings. There are multiple second positioning plates (503), which are located between the two first positioning plates (501). The lower ends of the multiple second positioning plates (503) are rotatably connected to the pressure rollers (504) through bearings.

6. A cooling device for plastic production according to claim 1, characterized in that: The power system (6) includes a circulation pump (601) located outside the water-cooled tank (2). The inlet of the circulation pump (601) is connected to an outlet pipe (602). The other end of the outlet pipe (602) passes through the side wall of the water-cooled tank (2) and connects to the inside of the filter box (401). The outlet of the circulation pump (601) is connected to an intermediate pipe (603). The other end of the intermediate pipe (603) is connected to the inlet of the heat pump evaporator (303). The power system (6) also includes a second inlet pipe (604). One end of the second inlet pipe (604) is connected to the outlet of the heat pump evaporator (303), and the other end passes through the inside of the water-cooled tank (2).

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