A modified plastic particle production line

Abstract

The application relates to the technical field of plastic machinery manufacturing, in particular to a modified plastic particle production line, which comprises a cooling water tank, the top end of the cooling water tank is movably provided with a top cover; a cooling stroke lengthening device and a temperature control device are arranged on the top cover; a circulating water cooling pump is arranged on one side of the cooling water tank; a water inlet pipe and a drain pipe are connected to the circulating water cooling pump; the water inlet pipe and the drain pipe are respectively connected to the outer side walls at the two ends of the cooling water tank; the temperature control device is arranged in the cooling water tank; and the temperature control device controls the circulating water cooling pump to start when the temperature of water in the cooling water tank exceeds a set value. The cooling stroke lengthening device is used for prolonging the stroke of plastic strips in the cooling water tank and the temperature control device is used for controlling the water temperature in the cooling water tank, so that the cooling problem of the plastic strips is solved.

Description

Technical Field

[0001] This invention relates to the field of plastic machinery manufacturing technology, specifically to a modified plastic granule production line. Background Technology

[0002] Currently, in the production of modified plastic materials, granular raw materials are produced on modified plastic pellet production lines. These lines typically consist of a mixing feeder, extruder, cooling water tank, drying fan, traction pelletizer, packaging machine, and an electrical control cabinet connected to each piece of equipment. The production line flow is: mixing feeder → extruder → cooling water tank → drying fan → traction device → pelletizer → packaging machine. During this production process, when the extruded plastic strips enter the cooling water tank, uneven temperature control and insufficient cooling time can affect the cooling effect of the plastic strips, thus reducing the quality of the finished plastic product.

[0003] Therefore, a modified plastic granule production line is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a modified plastic granule production line, which extends the travel of the plastic strip in the cooling water tank by means of a cooling travel extension device and a temperature control device to control the water temperature in the tank, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A modified plastic pellet production line, comprising:

[0007] The cooling water tank has support plates fixedly installed on the outer walls at both ends. Two fixing blocks are symmetrically fixedly installed on each of the two support plates, and guide rollers are rotatably installed between two adjacent fixing blocks.

[0008] The top cover is movably installed on the top of the cooling water tank, and two hydraulic cylinders are fixedly installed on the outer side wall of the cooling water tank, with the output ends of the two hydraulic cylinders fixedly connected to the top cover.

[0009] Also includes:

[0010] A cooling stroke extension device is installed on the top cover. The cooling water tank is used to cool the molded plastic strip. The cooling stroke extension device is used to extend the cooling time of the plastic strip in the cooling water tank.

[0011] A temperature control device is provided. A circulating water cooling pump is installed on one side of the cooling water tank. The circulating water cooling pump is connected to an inlet pipe and a drain pipe, which are respectively connected to the outer walls at both ends of the cooling water tank. A temperature control device is provided inside the cooling water tank. When the temperature of the water in the cooling water tank exceeds the set value, the temperature control device controls the circulating water cooling pump to start.

[0012] Preferably, the top cover is provided with a gas collection device, which includes a vacuum pump fixedly installed on the top wall of the top cover. The input end of the vacuum pump is connected to the top cover by a gas pipe one. A condenser is fixedly installed on the top wall of the top cover. The input end of the condenser is connected to the output end of the vacuum pump by a gas pipe two. A gas pipe three is fixedly installed on the top wall of the condenser. A waste gas treatment device is connected to the gas pipe three. A return water pipe is connected to the outer side wall of the bottom end of the condenser, and the bottom end of the return water pipe extends to the lower side of the top cover.

[0013] Preferably, the return water pipe is a bent pipe with a water seal function.

[0014] Preferably, the cooling stroke extension device includes two cylinders 1 symmetrically fixedly installed on the bottom wall of the top cover, and the output ends of the two cylinders 1 are jointly fixedly installed on a mounting frame 1. Multiple rollers 1 are uniformly rotatably installed on the mounting frame 1. Two cylinders 2 are symmetrically fixedly installed on the bottom wall of the top cover, and the output ends of the two cylinders 2 are jointly fixedly installed on a mounting frame 2. Multiple rollers 2 are uniformly rotatably installed on the mounting frame 2.

[0015] Preferably, the temperature control device includes a fixed plate fixedly installed on the inner wall of the cooling water tank. A detection tube is fixedly installed on the fixed plate. A movable groove is formed on the inner wall of the bottom end of the detection tube. The bottom end of the movable groove is filled with mercury. A slider is movably installed in the movable groove. An installation rod is fixedly installed on the top wall of the slider. A movable hole that cooperates with the installation rod is formed on the top wall of the inner side of the movable groove. Two metal plates are symmetrically fixedly installed on the inner wall of the top of the movable hole. The two metal plates are electrically connected to the circulating water cooling pump. A metal rod for connecting the two metal plates is fixedly installed on the top of the installation rod. A return spring is fixedly installed on the slider, and the top end of the return spring is fixedly connected to the top wall of the inner side of the movable groove.

[0016] Preferably, the cooling water tank is equipped with a water level controller, which includes a fixed rod fixedly installed in the cooling water tank, a float plate movably installed on the fixed rod, limit rings fixedly installed on the outer walls of the top and bottom ends of the fixed rod, and reed switch one and reed switch two respectively installed on the outer walls of the top and bottom ends of the fixed rod, and reed switch one and reed switch two cooperate with the float plate. A water supply pump is connected to the cooling water tank, and the water supply pump is equipped with a start switch and a stop switch, and reed switch one and reed switch two are electrically connected to the start switch and the stop switch respectively.

[0017] Preferably, the cooling water tank is provided with a scraping and impurity removal device that cooperates with the plastic strip. The scraping and impurity removal device includes two fixed blocks symmetrically fixedly installed on one of the support plates. A steering roller is rotatably installed between the two fixed blocks. A scraper blade that cooperates with the plastic strip is fixedly installed on the support plate, and the scraper blade is located on one side of the steering roller. A guide plate is fixedly installed at the bottom end of the scraper blade. The scraper blade has a scraping and impurity removal opening that cooperates with the plastic strip, and the guide plate is located below the scraping and impurity removal opening. The bottom end of the guide plate is connected to the interior of the cooling water tank.

[0018] Preferably, a screen is fixedly installed on the top wall of the diversion plate, and a filter screen is fixedly installed at the connection between the diversion plate and the cooling water tank.

[0019] Preferably, the top cover is made of aluminum alloy.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The modified plastic granule production line of the present invention is equipped with a gas collection device on the top cover. When the plastic strip is not cooled, it is in a high temperature state and will emit toxic gases. After entering the cooling water tank for cooling, it will release heat in the water and generate water vapor. The toxic gases and water vapor are extracted from the gas pipe one by the air pump. The toxic gases enter the waste gas treatment equipment through the gas pipe three for waste gas treatment to prevent the continuous emission of toxic gases. The water vapor is condensed into liquid water by the condenser. The liquid water flows into the cooling water tank through the return water pipe to reduce water loss and improve water utilization.

[0022] 2. The modified plastic granule production line of the present invention has a cooling stroke extension device installed on the top cover. By controlling two cylinders and two cylinders, the path of the plastic strip is changed, the cooling stroke of the plastic strip in the water tank is increased, thereby extending the cooling time of the plastic strip.

[0023] 3. In the modified plastic granule production line of the present invention, a circulating water cooling pump is provided on one side of the cooling water tank. The circulating water cooling pump is connected to an inlet pipe and a drain pipe, which are respectively connected to the outer walls at both ends of the cooling water tank. A temperature control device is provided in the cooling water tank. When the temperature of the water in the cooling water tank exceeds the set value, the temperature control device controls the circulating water cooling pump to start, thereby controlling the water temperature in the tank and improving the cooling effect of the plastic strips. Attached Figure Description

[0024] Figure 1 This is a front view of the overall structure of the present invention;

[0025] Figure 2 This is a plan view of the present invention;

[0026] Figure 3 for Figure 2 Sectional view (AA);

[0027] Figure 4 for Figure 2 BB section view;

[0028] Figure 5 for Figure 4 Enlarged view of the structure of section M in the middle;

[0029] Figure 6 This is a bottom view of the top cover structure of the present invention;

[0030] Figure 7 This is a rear view of the overall structure of the present invention;

[0031] Figure 8 for Figure 7 Enlarged view of the structure of section K in the middle.

[0032] In the diagram: 1. Cooling water tank; 2. Top cover; 3. Return water pipe; 4. Condenser; 5. Gas pipe three; 6. Gas pipe two; 7. Air pump; 8. Gas pipe one; 9. Water inlet pipe; 10. Water replenishment pump; 11. Hydraulic cylinder; 12. Drain pipe; 14. Detection pipe; 15. Fixing plate; 1401. Metal sheet; 1402. Metal rod; 1403. Mounting rod; 1404. Return spring; 1405. Slider; 1406. Movable groove; 1407. Movable hole; 101. Fixing rod; 10 2. Limiting ring; 103. Reed switch one; 104. Float plate; 105. Reed switch two; 201. Guide roller; 202. Turning roller; 203. Squeegee; 204. Filter screen; 205. Support plate; 206. Fixing block one; 207. Fixing block two; 208. Drain plate; 209. Screen; 210. Squeegee opening for removing impurities; 301. Cylinder one; 302. Mounting bracket one; 303. Mounting bracket two; 304. Roller one; 305. Cylinder two; 306. Roller two. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 8 This invention provides a modified plastic granule production line, the technical solution of which is as follows:

[0035] A modified plastic pellet production line, comprising:

[0036] Cooling water tank 1, support plates 205 are fixedly installed on the outer walls at both ends of cooling water tank 1, and two fixing blocks 206 are symmetrically fixedly installed on the two support plates 205. Guide rollers 201 are rotatably installed between the two adjacent fixing blocks 206.

[0037] Top cover 2 is movably installed on the top of cooling water tank 1. Two hydraulic cylinders 11 are fixedly installed on the outer side wall of cooling water tank 1, and the output ends of the two hydraulic cylinders 11 are fixedly connected to the top cover 2.

[0038] Also includes:

[0039] Cooling stroke extension device: A cooling stroke extension device is installed on the top cover 2. The cooling water tank 1 is used to cool the molded plastic strip. The cooling stroke extension device is used to extend the cooling time of the plastic strip in the cooling water tank 1.

[0040] A temperature control device is provided. A circulating water cooling pump is installed on one side of the cooling water tank 1. The circulating water cooling pump is connected to an inlet pipe 9 and a drain pipe 12. The inlet pipe 9 and the drain pipe 12 are respectively fixedly installed on the outer walls of both ends of the cooling water tank 1. A temperature control device is provided inside the cooling water tank 1. When the temperature of the water in the cooling water tank 1 exceeds the set value, the temperature control device controls the circulating water cooling pump to start.

[0041] Before the plastic strip enters the cooling water tank 1, two hydraulic cylinders 11 are activated to drive the top cover 2 to move upward. The plastic strip enters the cooling stroke extension device on the top cover 2 through the guide roller 201 at one end of the cooling water tank 1, thereby increasing the stroke of the plastic strip in the cooling water tank 1 and extending the cooling time of the plastic strip in the cooling water tank 1. When the temperature of the water in the cooling water tank 1 exceeds the set value of the temperature control device, the temperature control device controls the circulating water cooling pump to start. The hot water in the cooling water tank 1 is discharged from the drain pipe 12, and the cold water is discharged into the cooling water tank 1 from the inlet pipe 9, thereby reducing the water temperature in the cooling water tank 1 and improving the cooling effect on the plastic strip.

[0042] As one embodiment of the present invention, refer to Figure 1 Figure 3 The top cover 2 is equipped with a gas collection device, which includes a vacuum pump 7 fixedly installed on the top wall of the top cover 2. The input end of the vacuum pump 7 is connected to the top cover 2 by a gas pipe 8. A condenser 4 is fixedly installed on the top wall of the top cover 2. A gas pipe 6 is connected between the input end of the condenser 4 and the output end of the vacuum pump 7. A gas pipe 5 is fixedly installed on the top wall of the condenser 4. A waste gas treatment device is connected to the gas pipe 5. A return water pipe 3 is connected to the outer wall of the bottom end of the condenser 4, and the bottom end of the return water pipe 3 extends to the lower side of the top cover 2.

[0043] When the plastic strip is not cooled, it is in a high-temperature state and will emit toxic gases. After entering the cooling water tank 1, it will release heat in the water and generate water vapor. The toxic gases and water vapor are extracted from the air pipe 8 by the air pump 7. The toxic gases enter the waste gas treatment equipment through the air pipe 5 for waste gas treatment to prevent the continuous emission of toxic gases. The water vapor is condensed into liquid water by the condenser 4. The liquid water flows into the cooling water tank 1 through the return water pipe 3 to reduce water loss and improve water utilization.

[0044] As one embodiment of the present invention, refer to Figure 3 The return water pipe 3 is a bent pipe with a water seal function.

[0045] The return water pipe 3 has a bent pipe structure. The U-shaped groove inside the bent pipe is filled with liquid water to prevent toxic gases from returning to the cooling water tank 1 through the return water pipe 3. Water vapor is condensed by the condenser 4 to form liquid water that flows into the U-shaped groove. The water in the U-shaped groove will overflow, and the overflowing water will flow into the cooling water tank 1, thereby improving water utilization.

[0046] As one embodiment of the present invention, refer to Figure 3 and Figure 6 The cooling stroke extension device includes two cylinders 301 symmetrically fixedly installed on the bottom wall of the top cover 2. The output ends of the two cylinders 301 are fixedly installed on a mounting frame 302. Multiple rollers 304 are evenly rotatably installed on the mounting frame 302. Two cylinders 305 are symmetrically fixedly installed on the bottom wall of the top cover 2. The output ends of the two cylinders 305 are fixedly installed on a mounting frame 303. Multiple rollers 306 are evenly rotatably installed on the mounting frame 303.

[0047] Before the plastic strip is formed and enters the cooling water tank 1, two hydraulic cylinders 11 need to be activated to jointly drive the top cover 2 to rise. Simultaneously, two air cylinders 301 and 305 need to be activated to drive both cylinders 301 downwards, thus moving the mounting bracket 302 downwards. Conversely, two air cylinders 305 need to be activated to drive both cylinders 305 upwards, thus moving the mounting bracket 303 upwards. The plastic strip is then manually pulled from the guide roller 201 at one end of the cooling water tank 1 and placed into the cooling water tank 1. The plastic strip is then moved in a straight line between the mounting brackets 302 and 303. After passing through, the plastic strip is guided out by the guide roller 201 at one end of the cooling water tank 1. At this time, two cylinders 301 and 305 need to be driven together to move the two cylinders 301 upwards and the two cylinders 305 downwards simultaneously, so that the roller 304 is above and the roller 306 is below. The plastic strip passes around the rollers 304 and 306 in sequence to form a wave shape, thereby extending the cooling time of the plastic strip in the cooling water tank 1. Then, two hydraulic cylinders 11 need to be driven to drive the top cover 2 to descend and close with the cooling water tank 1.

[0048] As one embodiment of the present invention, refer to Figure 4 and Figure 5 The temperature control device includes a fixed plate 15 fixedly installed on the inner wall of the cooling water tank 1. A detection tube 14 is fixedly installed on the fixed plate 15. A movable groove 1406 with a small cross-sectional area and a high height is opened on the inner wall of the bottom end of the detection tube 14. The bottom end of the movable groove 1406 is filled with mercury. A slider 1405 is slidably and sealedly connected inside the movable groove 1406. An installation rod 1403 is fixedly installed on the top wall of the slider 1405. A mounting rod 1403 is opened on the top wall of the inner side of the movable groove 1406. The rod 1403 has a movable hole 1407 that cooperates with each other. Two metal pieces 1401 are symmetrically fixed on the inner side wall of the top of the movable hole 1407, and the two metal pieces 1401 are electrically connected to the circulating water cooling pump. A metal rod 1402 for connecting the two metal pieces 1401 is fixedly installed on the top of the mounting rod 1403. A return spring 1404 is fixedly installed on the slider 1405, and the top of the return spring 1404 is fixedly connected to the top wall of the inner side of the movable groove 1406.

[0049] The plastic strip enters the cooling water tank 1, causing the water temperature to rise. When the detection tube 14 is heated, the mercury in the movable tank 1406 expands significantly due to its small cross-sectional area and high height. This expansion drives the slider 1405, which floats on the mercury surface, to rise along the inner wall of the movable tank 1406. This, in turn, causes the metal rod 1402 on the mounting rod 1403 to move upwards along the movable hole 1407. When the metal rod 1402 reaches the position where it contacts the two metal plates 1401, the metal rod 1402 and the two metal plates 1401... When the passage is formed, the circulating water cooling pump is powered on and started. Hot water in the cooling water tank 1 is discharged from the drain pipe 12, and cold water is discharged into the cooling water tank 1 from the inlet pipe 9, thereby reducing the water temperature in the cooling water tank 1 and improving the cooling effect of the plastic strip. When the water temperature drops, the mercury contracts when it gets cold and will descend along the inner wall of the movable groove 1406. The return spring 1404 causes the slider 1405 to descend. The descent of the slider 1405 will drive the metal rod 1402 to descend. The metal rod 1402 is disconnected from the two metal plates 1401, the metal rod 1402 and the two metal plates 1401 are de-energized, and the circulating water cooling pump stops running.

[0050] As one embodiment of the present invention, refer to Figure 4 The cooling water tank 1 is equipped with a water level controller, which includes a fixed rod 101 fixedly installed in the cooling water tank 1. A float 104 is movably installed on the fixed rod 101. A permanent magnet is installed inside the float 104. Limiting rings 102 are fixedly installed on the outer walls of the top and bottom ends of the fixed rod 101. A reed switch 103 and a reed switch 105 are respectively installed on the outer walls of the top and bottom ends of the fixed rod 101, and the reed switch 103 and the reed switch 105 cooperate with the float 104. A water supply pump 10 is connected to the cooling water tank 1. The water supply pump 10 is equipped with a start switch and a stop switch, and the reed switch 103 and the reed switch 105 are electrically connected to the start switch and the stop switch, respectively.

[0051] Before the water level controller is activated, the reed in reed switch 103 is normally open, and the reed in reed switch 105 is normally closed. When the water level in the cooling water tank 1 drops, the float 104 on the water surface will descend along the fixed rod 101. When the float 104 descends to the bottom limit ring 102, the permanent magnet in the float 104 will magnetize the reed switch 103 at the bottom, causing the reed in reed switch 103 to close. The water pump 10 will start and replenish water into the cooling water tank 1. As the water level rises, the float 104 will rise along the fixed rod 101. When the float 104 rises to the top limit ring 102, the permanent magnet in the float 104 will magnetize the reed switch 105 at the top, causing the reed in reed switch 105 to open. The water pump 10 will stop replenishing water, thus achieving automatic water replenishment.

[0052] As one embodiment of the present invention, refer to Figure 7 and Figure 8 The cooling water tank 1 is equipped with a scraping and impurity removal device that cooperates with the plastic strip. The scraping and impurity removal device includes two fixing blocks 207 symmetrically fixed on one of the support plates 205. A guide roller 202 is rotatably mounted between the two fixing blocks 207. A scraper 203 that cooperates with the plastic strip is fixedly mounted on the support plate 205, and the scraper 203 is located on one side of the guide roller 202. A guide plate 208 is fixedly mounted at the bottom end of the scraper 203. The scraper 203 has a scraping and impurity removal opening 210 that cooperates with the plastic strip, and the guide plate 208 is located below the scraping and impurity removal opening 210. The bottom end of the guide plate 208 is connected to the interior of the cooling water tank 1.

[0053] The cooled plastic strip extends out from one end of the cooling water tank 1. The plastic strip is rolled by the guide roller 202 so that it passes through the scraper and impurity removal port. A large amount of impurities and water attached to the surface of the plastic strip are scraped off, reducing the drying time of the production line drying equipment. The scraped water flows into the cooling water tank 1 along the guide plate 208, improving the utilization of water resources.

[0054] As one embodiment of the present invention, refer to Figure 8 A screen 209 is fixedly installed on the top wall of the diversion plate 208, and a filter screen 204 is fixedly installed at the connection between the diversion plate 208 and the cooling water tank 1.

[0055] The water and impurities scraped off by the plastic strip are separated from the water by the screen 209. The separated water flows into the cooling water tank 1 through the filter screen 204 via the guide plate 208, so that the water resources can be recycled.

[0056] As one embodiment of the present invention, refer to Figure 1 The top cover 2 is made of aluminum alloy.

[0057] The top cover 2 is too large, and the hydraulic cylinder 11 requires a large load to lift the top cover 2. The aluminum alloy material is lighter, and using aluminum alloy material can reduce the load on the hydraulic cylinder 11 when it is working.

[0058] As one embodiment of the present invention, refer to Figure 1 A rubber ring that mates with the cooling water tank 1 is fixedly installed on the bottom wall of the top cover 2.

[0059] Installing a rubber ring on the bottom wall of the top cover 2 can act as a buffer when the top cover 2 descends and fits into the cooling water tank 1, while also increasing the airtightness when the top cover 2 and the cooling water tank 1 are closed.

[0060] Working principle: Before the plastic strip enters the cooling water tank 1, two hydraulic cylinders 11 are activated to drive the top cover 2 upward. The plastic strip enters the cooling stroke extension device on the top cover 2 through the guide roller 201 at one end of the cooling water tank 1, thereby increasing the stroke of the plastic strip in the cooling water tank 1 and extending the cooling time. When the temperature of the water in the cooling water tank 1 exceeds the set value of the temperature control device, the temperature control device controls the circulating water cooling pump to start. Hot water in the cooling water tank 1 is discharged from the drain pipe 12, and cold water is discharged into the cooling water tank 1 from the inlet pipe 9, thereby reducing the water temperature in the cooling water tank 1 and increasing the cooling stroke. The cooling effect on the plastic strip: When the plastic strip is not cooled, it is in a high-temperature state and will emit toxic gases. After entering the cooling water tank 1, it will release heat in the water and generate water vapor. The toxic gases and water vapor are extracted from the gas pipe 8 by the suction pump 7. The toxic gases enter the exhaust gas treatment equipment through the exhaust pipe 5 for exhaust gas treatment to prevent the continuous emission of toxic gases. The water vapor is condensed into liquid water by the condenser 4. The liquid water flows into the cooling water tank 1 through the return water pipe 3. The return water pipe 3 has a bent pipe structure. The U-shaped groove inside the bent pipe is filled with liquid water to prevent the toxic gases from returning to the cooling water tank 1 through the return water pipe 3. Steam condenses into liquid water through condenser 4 and flows into the U-shaped groove. Water overflows from the U-shaped groove and flows into the cooling water tank 1. Before the plastic strip is formed and enters the cooling water tank 1, two hydraulic cylinders 11 are activated to jointly drive the top cover 2 upwards. Simultaneously, two air cylinders 301 and 305 are also activated, causing two air cylinders 301 to move downwards, thus moving the mounting bracket 302 downwards, and two air cylinders 305 to move upwards, thus moving the mounting bracket 303 upwards. The plastic strip is then manually pulled from the guide roller 201 at one end of the cooling water tank 1. Take the plastic strip into the cooling water tank 1 and pass it straight through the mounting bracket 302 and mounting bracket 303. Then, the plastic strip is guided out by the guide roller 201 at one end of the cooling water tank 1. At this time, it is necessary to drive the two cylinders 301 and 305 together to drive the two cylinders 301 to move upward at the same time and drive the two cylinders 305 to move downward at the same time, so that the roller 304 is above and the roller 306 is below. The plastic strip passes around the roller 304 and the roller 306 in sequence to form a wave shape. Then, it is necessary to drive the two hydraulic cylinders 11 to drive the top cover 2 to descend and close with the cooling water tank 1.The plastic strip enters the cooling water tank 1, causing the water temperature to rise. The detection tube 14 is heated. Due to the small cross-sectional area and high height of the movable tank 1406, the mercury inside expands significantly upon heating, causing it to rise noticeably. This expansion drives the slider 1405, floating on the mercury surface, to rise along the inner wall of the movable tank 1406. This, in turn, moves the metal rod 1402 on the mounting rod 1403 upwards along the movable hole 1407. When the metal rod 1402 reaches a position where it contacts the two metal plates 1401, a passage is formed between the metal rod 1402 and the two metal plates 1401. The circulating water cooling pump is then powered on and starts, allowing hot water in the cooling water tank 1 to drain from the drain pipe 12. Cold water is discharged from the inlet pipe 9 into the cooling water tank 1, thereby reducing the water temperature in the cooling water tank 1 and improving the cooling effect of the plastic strip. When the water temperature drops, the mercury contracts upon cooling and descends along the inner wall of the movable groove 1406. The return spring 1404 causes the slider 1405 to descend, which in turn causes the metal rod 1402 to descend. The metal rod 1402 disconnects from the two metal plates 1401, de-energizing the metal rod 1402 and the two metal plates 1401, and the circulating water cooling pump stops running. Before the water level controller is activated, the reed in reed switch one 103 is normally open, and the reed in reed switch two 105 is normally closed. When the water level in the cooling water tank 1 drops, the water surface... The float 104 descends along the fixed rod 101. When the float 104 reaches the bottom limiting ring 102, the permanent magnet inside the float 104 magnetizes the reed switch 103 at the bottom, causing the reed in the reed switch 103 to close. The water pump 10 starts and pumps water into the cooling water tank 1, causing the water level to rise. The float 104 then rises along the fixed rod 101. When the float 104 reaches the top limiting ring 102, the permanent magnet inside the float 104 magnetizes the reed switch 105 at the top, causing the reed in the reed switch 105 to open. The water pump 10 stops pumping water. When the water level in the cooling water tank 1 drops, the float 104 on the water surface descends along the fixed rod 101. As the float 104 descends to the bottom limiting ring 102, it drives the bottom reed switch 103 to close, activating the water pump 10. The water pump 10 then pumps water into the cooling water tank 1, causing the water level to rise. The float 104 then rises along the fixed rod 101. When the float 104 reaches the top limiting ring 102, it drives the top reed switch 105 to open, stopping the water pump 10. The cooled plastic strip exits from one end of the cooling water tank 1. The plastic strip is rolled by the guide roller 202, allowing it to pass through the scraper and impurity removal port. Impurities and water adhering to the surface of the plastic strip are largely scraped off, and the scraped water flows into the cooling water tank 1 along the guide plate 208.

[0061] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modified plastic granule production line, comprising: The cooling water tank has support plates fixedly installed on the outer walls at both ends. Two fixed blocks are symmetrically fixedly installed on each of the two support plates, and guide rollers are rotatably installed between the two adjacent fixed blocks. The top cover is movably installed on the top of the cooling water tank. Two hydraulic cylinders are fixedly installed on the outer wall of the cooling water tank, and the output ends of the two hydraulic cylinders are fixedly connected to the top cover. Its characteristic is that it further includes: Cooling stroke extension device: A cooling stroke extension device is installed on the top cover. The cooling water tank is used to cool the molded plastic strip. The cooling stroke extension device is used to extend the cooling time of the plastic strip in the cooling water tank. A temperature control device is provided. A circulating water cooling pump is installed on one side of the cooling water tank. The circulating water cooling pump is connected to an inlet pipe and a drain pipe. The inlet pipe and the drain pipe are fixedly installed on the outer walls at both ends of the cooling water tank. A temperature control device is provided inside the cooling water tank. When the temperature of the water in the cooling water tank exceeds the set value, the temperature control device controls the circulating water cooling pump to start. The cooling stroke extension device includes two cylinders 1 symmetrically fixedly installed on the bottom wall of the top cover. The output ends of the two cylinders 1 are jointly fixedly installed on a mounting frame 1. Multiple rollers 1 are uniformly rotatably installed on the mounting frame 1. Two cylinders 2 are symmetrically fixedly installed on the bottom wall of the top cover. The output ends of the two cylinders 2 are jointly fixedly installed on a mounting frame 2. Multiple rollers 2 are uniformly rotatably installed on the mounting frame 2. Rollers 1 and rollers 2 are alternately arranged. The cooling water tank is equipped with a water level controller, which includes a fixed rod that is fixedly installed in the cooling water tank. A float plate is movably installed on the fixed rod. A magnetic ring is installed inside the float plate. Limiting rings are fixedly installed on the outer walls of the top and bottom ends of the fixed rod. A reed switch one and a reed switch two are respectively installed on the outer walls of the top and bottom ends of the fixed rod, and both reed switches one and two cooperate with the float plate. A water supply pump is connected to the cooling water tank. The water supply pump is equipped with a start switch and a stop switch, and reed switches one and two are electrically connected to the start switch and the stop switch, respectively. The top cover is equipped with a gas collection device, which includes a vacuum pump fixedly installed on the top wall of the top cover. The input end of the vacuum pump is connected to the top cover by a gas pipe one. A condenser is fixedly installed on the top wall of the top cover. The input end of the condenser is connected to the output end of the vacuum pump by a gas pipe two. A gas pipe three is fixedly installed on the top wall of the condenser. Waste gas treatment equipment is connected to the gas pipe three. A return water pipe is connected to the outer wall of the bottom end of the condenser, and the bottom end of the return water pipe extends to the lower side of the top cover. The return water pipe is a bent pipe with a water seal function. The temperature control device includes a fixed plate fixedly installed on the inner wall of the cooling water tank. A detection tube is fixedly installed on the fixed plate. A movable groove with a very small cross-sectional area and a relatively high height is opened on the inner wall of the bottom end of the detection tube. The bottom end of the movable groove is filled with mercury. A slider is slidably and sealed inside the movable groove. An installation rod is fixedly installed on the top wall of the slider. A movable hole that cooperates with the installation rod is opened on the top wall of the inner side of the movable groove. Two metal plates are symmetrically fixedly installed on the inner wall of the top of the movable hole. The two metal plates are electrically connected to the circulating water cooling pump. A metal rod for connecting the two metal plates is fixedly installed on the top of the installation rod. A return spring is fixedly installed on the slider, and the top end of the return spring is fixedly connected to the top wall of the inner side of the movable groove. Before the plastic strip is formed and enters the cooling water tank, two hydraulic cylinders need to be activated to drive the top cover to rise. At the same time, two cylinders (cylinder 1 and cylinder 2) need to be activated to drive cylinder 1 downwards, thereby moving mounting bracket 1 downwards. Cylinder 2 needs to be activated to drive cylinder 2 upwards, thereby moving mounting bracket 2 upwards. The plastic strip is then manually pulled from guide roller 1 at one end of the cooling water tank and placed into the cooling water tank. The plastic strip passes straight between mounting bracket 1 and mounting bracket 2. Then, the plastic strip is discharged through guide roller 2 at one end of the cooling water tank. At this time, two cylinders (cylinder 1 and cylinder 2) need to be activated to drive cylinder 1 upwards and cylinder 2 downwards, so that roller 1 is above and roller 2 is below. The plastic strip passes around roller 1 and roller 2 in sequence to form a wave shape. Finally, two hydraulic cylinders need to be activated to drive the top cover to descend and close with the cooling water tank. The cooling water tank is equipped with a scraping and impurity removal device that works in conjunction with the plastic strip. The scraping and impurity removal device includes two fixed blocks 2 that are symmetrically fixedly installed on one of the support plates. A guide roller is rotatably installed between the two fixed blocks 2. A scraper blade that works in conjunction with the plastic strip is fixedly installed on the support plate, and the scraper blade is located on one side of the guide roller. A guide plate is fixedly installed at the bottom of the scraper blade. The scraper blade has a scraping and impurity removal opening that works in conjunction with the plastic strip, and the guide plate is located below the scraping and impurity removal opening. The bottom end of the guide plate is connected to the interior of the cooling water tank. A screen is fixedly installed on the top wall of the diversion plate, and a filter screen is fixedly installed at the connection between the diversion plate and the cooling water tank. The cooled plastic strip extends out from one end of the cooling water tank. The plastic strip is rolled by the guide roller and passes through the scraper and impurity removal port. A large amount of impurities and water attached to the surface of the plastic strip are scraped off, and the scraped water flows into the cooling water tank along the guide plate.

2. The modified plastic particle production line of claim 1, wherein: The top cover is made of aluminum alloy.

3. The modified plastic particle production line of claim 1, wherein: A rubber ring that mates with the cooling water tank is fixedly installed on the bottom wall of the top cover.

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