A cooling device for a twin-screw extruder

Abstract

The application discloses a cooling device of a double-screw extruder, and relates to the technical field of double-screw extruders, which comprises a barrel, a screw, a circulating oil cooling assembly and a water cooling assembly, a pair of meshing screws are arranged in the barrel in a rotating mode, the circulating oil cooling assembly is arranged on the outer side of the barrel, the circulating oil cooling assembly comprises a plurality of groups of heat exchange pipes, a circulating pipeline, a heat dissipation pipe and a filtering and guiding component, the plurality of groups of heat exchange pipes are arranged in the barrel, the circulating pipeline is used for circulating and conveying heat-conducting oil into the plurality of groups of heat exchange pipes, the heat dissipation pipe is arranged on one side of the barrel, and the filtering and guiding component is used for filtering and treating the heat-conducting oil, the water cooling assembly is arranged on one side of the barrel, the water cooling assembly comprises a cooling water tank, a plurality of groups of heat dissipation fans and a spraying water cooling component, the cooling water tank is arranged on the outer side of the heat dissipation pipe, and the spraying water cooling component is used for water-cooling and heat-dissipating the heat dissipation pipe. The application has the effect of continuously cooling the barrel and the screw.

Description

Technical Field

[0001] This application relates to the field of twin-screw extruder technology, and in particular to a cooling device for a twin-screw extruder. Background Technology

[0002] Twin-screw extruders are a type of polymer material processing equipment that uses two screws to rotate in an intermeshing or non-intermeshing manner to achieve the function of material extrusion and granulation. In order to control the processing temperature, prevent the material from overheating and decomposing, and ensure molding quality, a cooling device is required to cool the barrel and screws.

[0003] Existing twin-screw extruders mainly use water cooling or oil cooling to cool the barrel and screw. However, the cooling effect of using water cooling or oil cooling alone is poor, and the heat dissipation effect of the cooling water or heat transfer oil discharged by heat exchange is also poor. As a result, the continuous effect of using the cooling water or heat transfer oil circulation method to cool the barrel and screw is poor. Utility Model Content

[0004] To address the issue of poor continuous cooling in twin-screw extruders, this application provides a cooling device for twin-screw extruders.

[0005] This application provides a cooling device for a twin-screw extruder, which adopts the following technical solution: A cooling device for a twin-screw extruder includes: a barrel, screws, a circulating oil cooling assembly, and a water cooling assembly. A pair of meshing screws are rotatably disposed inside the barrel. The circulating oil cooling assembly is located outside the barrel and includes several sets of heat exchange tubes, a circulation pipeline, a heat dissipation pipe, and a filter guide component. The heat exchange tubes are all located inside the barrel. The circulation pipeline circulates heat transfer oil to the heat exchange tubes. The heat dissipation pipe is located on one side of the barrel. The filter guide component filters impurities from the heat transfer oil. The water cooling assembly is located on one side of the barrel and includes a cooling water tank, multiple sets of cooling fans, and a spray water cooling component. The cooling water tank is fitted over the heat dissipation pipes. The cooling fans are fixedly mounted on the outside of the cooling water tank. The spray water cooling component is located above the heat dissipation pipes and provides water cooling for the heat dissipation pipes.

[0006] By adopting the above technical solution, during use, the heat transfer oil is circulated to the heat exchange tube through the circulation pipeline. The heat transfer oil and the barrel are cooled by heat exchange. After the heat exchange, the heat transfer oil is also transported to the impurity filtering and guiding component through the circulation pipeline. After filtering out impurities, it flows back to the heat dissipation tube. The heat transfer oil flowing in the heat dissipation tube is cooled by the water cooling component, which ensures the effect of continuous cooling of the barrel and screw by the heat transfer oil in the subsequent use.

[0007] Optionally, several sets of heat exchange tubes are fixedly connected to a liquid inlet pipe and a liquid outlet pipe at both ends, and the liquid inlet pipe and the liquid outlet pipe are both installed through the material cylinder.

[0008] By adopting the above technical solution, heat transfer oil is delivered into the heat exchange tube through the liquid filling pipe, and the heat transfer oil after heat exchange is discharged from the heat exchange tube through the liquid outlet pipe.

[0009] Optionally, the circulation pipeline includes a circulating oil pump, a main oil delivery pipe, and multiple branch oil delivery pipes. The circulating oil pump is fixedly installed above the cooling water tank. The inlet of the circulating oil pump is connected to the outlet of the radiator pipe. The inlet of the main oil delivery pipe is fixedly connected to the outlet of the circulating oil pump. The two ends of the multiple branch oil delivery pipes are respectively connected to the outlet of the main oil delivery pipe and the filling pipe.

[0010] By adopting the above technical solution, during use, the operation of the circulating oil pump can extract and pressurize the heat transfer oil in the heat dissipation pipe. Under the action of the circulating oil pump, the heat transfer oil is transported along the main oil pipeline, multiple branch oil pipelines and liquid filling pipeline to the heat exchange pipe, thereby achieving the purpose of oil cooling for the barrel and screw.

[0011] Optionally, the circulation pipeline further includes multiple return branch oil pipes and a return main oil pipe, one end of each of the multiple return branch oil pipes is connected to the outlet pipe, and the other end of the return main oil pipe is connected to the multiple return branch oil pipes.

[0012] By adopting the above technical solution, multiple return branch oil pipes serve to connect the liquid outlet pipe and the return main oil pipe. Through the cooperation of multiple return branch oil pipes and the return main oil pipe, the heat transfer oil after heat exchange in the heat exchange tube is returned and discharged.

[0013] Optionally, the impurity filtering and guiding component includes a guide cylinder and a filter screen cylinder, wherein the guide cylinder is connected to the return main oil pipe, and the filter screen cylinder is fixedly installed inside the guide cylinder.

[0014] By adopting the above technical solution, the heat transfer oil discharged from the return main oil pipe is filtered through the filter screen, which reduces the risk of subsequent impurities clogging the heat dissipation pipe and heat exchange pipe. At the same time, the quality of the heat transfer oil can be observed and judged by observing the guide tube, which facilitates timely replacement of the heat transfer oil.

[0015] Optionally, the filter screen divides the guide tube into a dust filter chamber and a return chamber, the return main oil pipe is connected to the dust filter chamber, and the liquid inlet of the heat dissipation pipe is connected to the return chamber.

[0016] By adopting the above technical solution, when in use, the heat transfer oil transported by the return main oil pipe is filtered through the dust filter chamber, and the filtered heat transfer oil is returned and guided through the return chamber.

[0017] Optionally, the spray water-cooling component includes a spray plate, multiple sets of nozzles, and a water supply pipe. The spray plate is a hollow component, the multiple sets of nozzles are evenly and fixedly arranged below the spray plate, and the water supply pipe is fixedly arranged above the spray plate.

[0018] By adopting the above technical solution, when in use, low-temperature cooling water is transported to the spray plate through the water supply pipe, and the cooling water is sprayed onto the heat dissipation pipe through multiple sets of nozzles to perform spray cooling treatment.

[0019] Optionally, a drain pipe is fixedly connected to one side of the cooling water tank.

[0020] By adopting the above technical solution, it is convenient to drain the cooling water in the cooling water tank, thereby facilitating the subsequent supply of low-temperature cooling water into the cooling water tank and ensuring the water cooling effect on the heat dissipation pipes.

[0021] In summary, the embodiments of this application provide a cooling device for a twin-screw extruder, which includes at least one of the following beneficial technical effects: 1. The combination of oil cooling and water cooling improves the cooling effect on the barrel and screw; 2. By setting up a filter and flow guiding component, the circulating heat transfer oil can be filtered to reduce the possibility of blockage in subsequent pipelines due to impurities. At the same time, the quality of the heat transfer oil can be observed, making it convenient to replace the heat transfer oil in a timely manner. 3. By setting up a spray water cooling component, the heat dissipation effect of the heat pipe on the heat transfer oil can be improved, ensuring the continuous cooling effect on the barrel and screw. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a cooling device for a twin-screw extruder provided in an embodiment of this application; Figure 2 Another angle structural schematic diagram of a cooling device for a twin-screw extruder provided in an embodiment of this application; Figure 3 A partial structural cross-sectional view of a cooling device for a twin-screw extruder provided in an embodiment of this application; Figure 4 A side sectional view of a cooling device for a twin-screw extruder provided in an embodiment of this application; Figure 5 for Figure 4 Schematic diagram of the structure at point A in the middle.

[0023] Explanation of the markings in the image: 1. Barrel; 101. Screw; 2. Circulating oil cooling assembly; 201. Heat exchange tube; 202. Heat dissipation tube; 203. Liquid filling pipe; 204. Liquid outlet pipe; 205. Circulating oil pump; 206. Main oil delivery pipe; 207. Branch oil delivery pipe; 208. Return branch oil pipe; 209. Main oil return pipe; 210. Flow guide cylinder; 211. Filter screen cylinder; 3. Water-cooled components; 301. Cooling water tank; 302. Cooling fan; 303. Spray plate; 304. Nozzle; 305. Water inlet pipe; 306. Drain pipe. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] Combination Figure 1 and Figure 2 This application discloses a cooling device for a twin-screw extruder, comprising: a barrel 1, a screw 101, a circulating oil cooling assembly 2, and a water cooling assembly 3. A pair of meshing screws 101 are rotatably disposed within the barrel 1. In use, heat transfer oil is circulated through a circulation pipeline to the heat exchange pipe 201, where heat transfer oil exchanges heat with the barrel 1 to cool the barrel 1 and screw 101. The heat transfer oil, after heat exchange, is also transported through the circulation pipeline to a filter and guide component, and after filtering out impurities, flows back to the circulating oil cooling assembly 2. The water cooling assembly 3 cools the heat transfer oil flowing within the circulating oil cooling assembly 2, ensuring continuous cooling of the barrel 1 and screw 101 using the heat transfer oil.

[0026] Combination Figure 3 and Figure 4 The circulating oil cooling assembly 2 is located outside the barrel 1. The circulating oil cooling assembly 2 includes several sets of heat exchange pipes 201, circulation pipes, heat dissipation pipes 202, and impurity filtering and guiding components. In actual use, the heat transfer oil exchanges heat with the barrel 1 during the flow in the heat exchange pipes 201, thereby cooling the barrel 1 and the screw 101. The heat transfer oil can be transported into the heat exchange pipes 201 through the circulation pipes, and the heat transfer oil in the heat exchange pipes 201 after heat exchange is discharged. The discharged heat transfer oil is filtered for impurities by the impurity filtering and guiding components.

[0027] Specifically, several sets of heat exchange tubes 201 are arranged in a spiral shape inside the barrel 1, so that the barrel 1 and screw 101 can be cooled by heat-conducting oil flowing in the heat exchange tubes 201.

[0028] In addition, the spacing of the heat exchange tubes 201 can be adjusted according to the different cooling requirements of different positions of the barrel 1 and screw 101. For example, the heat exchange tubes 201 should be arranged more densely in areas where a fast cooling rate is required.

[0029] Combination Figure 1 and Figure 2 Several sets of heat exchange tubes 201 are fixedly connected to a liquid inlet pipe 203 and a liquid outlet pipe 204 at both ends, and both the liquid inlet pipe 203 and the liquid outlet pipe 204 are installed through the feed cylinder 1. Heat transfer oil is supplied into the heat exchange tubes 201 through the liquid inlet pipe 203, and the heat transfer oil after heat exchange in the heat exchange tubes 201 is discharged through the liquid outlet pipe 204.

[0030] Combination Figure 4 The circulation pipeline is used to circulate the heat transfer oil to several sets of heat exchange tubes 201. The circulation pipeline includes a circulation oil pump 205, a main oil delivery pipe 206, and multiple branch oil delivery pipes 207. By controlling the operation of the circulation oil pump 205, the heat transfer oil in the heat dissipation tube 202 can be extracted and pressurized for delivery. Under the action of the circulation oil pump 205, the heat transfer oil is delivered to the heat exchange tubes 201 along the main oil delivery pipe 206, multiple branch oil delivery pipes 207, and the liquid filling pipe 203, thereby achieving the purpose of oil cooling for the barrel 1 and the screw 101.

[0031] In addition, a shut-off valve can be installed at one end of each of the multiple conveying branch oil pipes 207. The cooling effect of the material cylinder 1 can be adjusted by controlling the conduction state of the multiple conveying branch oil pipes 207 through the shut-off valve.

[0032] Combination Figure 4 The circulating oil pump 205 is fixedly installed above the cooling water tank 301, and its inlet is connected to the outlet of the heat exchange pipe 202. By controlling the operation of the circulating oil pump 205, the heat transfer oil in the heat exchange pipe 202 is extracted and pressurized for delivery.

[0033] Specifically, the circulating oil pump 205 is a TOP-25P400-208EVB type oil pump.

[0034] Combination Figure 4 The inlet of the main oil delivery pipe 206 is fixedly connected to the outlet of the circulating oil pump 205, and the two ends of multiple branch oil delivery pipes 207 are respectively connected to the outlet of the main oil delivery pipe 206 and the filling pipe 203. Through the cooperation of the main oil delivery pipe 206 and the multiple branch oil delivery pipes 207, heat transfer oil can be delivered to multiple sets of heat exchange pipes 201.

[0035] Combination Figure 3 The circulation pipeline also includes multiple return branch oil pipes 208 and a return main oil pipe 209. One end of each of the multiple return branch oil pipes 208 is connected to the outlet pipe 204, and the other end of the return main oil pipe 209 is connected to the multiple return branch oil pipes 208. The multiple return branch oil pipes 208 serve to connect the outlet pipe 204 and the return main oil pipe 209, and through the cooperation of the multiple return branch oil pipes 208 and the return main oil pipe 209, the heat transfer oil after heat exchange in the heat exchange tube 201 is returned and discharged.

[0036] Combination Figure 3 and Figure 4 The heat dissipation pipe 202 is located on one side of the barrel 1. The heat dissipation pipe 202 is used to dissipate heat from the returning heat transfer oil.

[0037] It is worth noting that the heat pipe 202 has a multi-stage reciprocating structure, which further ensures the contact area between the subsequent heat pipe 202 and the cooling water, and improves the heat dissipation effect of the heat transfer oil inside the heat pipe 202.

[0038] Combination Figure 4 and Figure 5 The impurity filtering and guiding component is used to filter impurities from the heat transfer oil. The component includes a guide cylinder 210 and a filter screen cylinder 211. The guide cylinder 210 is connected to the return main oil pipe 209, and the filter screen cylinder 211 is fixedly installed inside the guide cylinder 210. By filtering impurities from the heat transfer oil discharged from the return main oil pipe 209 through the filter screen cylinder 211, the risk of subsequent impurities clogging the heat dissipation pipe 202 and heat exchange pipe 201 is reduced. Simultaneously, the quality of the heat transfer oil can be observed and judged by looking through the guide cylinder 210, facilitating timely replacement of the heat transfer oil.

[0039] It is worth noting that the guide tube 210 is made of transparent sheet material, which makes it easy to observe the quality of the heat transfer oil.

[0040] Specifically, the filter screen 211 divides the guide tube 210 into a dust filtration chamber and a return chamber. The return main oil pipe 209 is connected to the dust filtration chamber, and the inlet of the heat dissipation pipe 202 is connected to the return chamber. The heat transfer oil transported by the return main oil pipe 209 is filtered through the dust filtration chamber, and the filtered heat transfer oil is returned and guided through the return chamber.

[0041] Combination Figure 3 , Figure 4 and Figure 5 The water-cooling component 3 is located on one side of the barrel 1. The water-cooling component 3 includes a cooling water tank 301, multiple sets of cooling fans 302, and a spray water-cooling component. In use, the cooling water tank 301 collects and stores cooling water, which then immerses and cools the heat dissipation pipe 202. At the same time, the operation of the multiple sets of cooling fans 302 is controlled to provide auxiliary cooling for the heat dissipation pipe 202 in the cooling water tank 301. In addition, the spray water-cooling component sprays water onto the heat dissipation pipe 202, further improving the heat dissipation effect of the heat dissipation pipe 202.

[0042] Combination Figure 3 and Figure 4 The cooling water tank 301 is installed on the outside of the heat dissipation pipe 202, and the cooling water is collected and stored through the cooling water tank 301.

[0043] Combination Figure 1 and Figure 2 Multiple cooling fans 302 are fixedly installed on the outside of the cooling water tank 301. By controlling the operation of multiple cooling fans 302, the air exhaust rate inside the cooling water tank 301 can be accelerated, thereby ensuring the cooling effect on the heat transfer oil inside the heat pipe 202.

[0044] Among them, the cooling fan 302 is commercially available and can be purchased and used directly.

[0045] Combination Figure 4 and Figure 5 A water-cooling spray system is positioned above the heat dissipation pipe 202 to provide water cooling for the heat dissipation pipe 202. The water-cooling spray system includes a spray plate 303, multiple sets of nozzles 304, and a water supply pipe 305. Low-temperature cooling water is delivered to the spray plate 303 through the water supply pipe 305, and the cooling water is sprayed onto the heat dissipation pipe 202 through the multiple sets of nozzles 304 to provide cooling treatment for the heat dissipation pipe 202.

[0046] Specifically, the spray plate 303 is a hollow component. Cooling water is guided through the spray plate 303 to multiple sets of nozzles 304.

[0047] Combination Figure 4 and Figure 5 Multiple sets of nozzles 304 are evenly and fixedly arranged below the spray plate 303. Cooling water is sprayed onto the heat dissipation pipe 202 through the multiple sets of nozzles 304 to provide auxiliary cooling for the circulating oil cooling assembly 2. A water supply pipe 305 is fixedly arranged above the spray plate 303. Cooling water is supplied into the spray plate 303 through the water supply pipe 305.

[0048] Combination Figure 1 A drain pipe 306 is fixedly connected to one side of the cooling water tank 301. This facilitates the discharge of cooling water from the cooling water tank 301, thereby facilitating the subsequent supply of low-temperature cooling water into the cooling water tank 301 and ensuring the water cooling effect on the heat dissipation pipe 202.

[0049] In addition, a shut-off valve is installed at one end of the drain pipe 306 to close the drain pipe 306.

[0050] In practical use, heat transfer oil is filled into the heat dissipation pipe 202. When the barrel 1 needs to be cooled, the operation of the circulating oil pump 205 is controlled to transport the heat transfer oil along the main oil pipe 206 and multiple branch oil pipes 207 to the heat exchange pipe 201. The barrel 1 and screw 101 are cooled by heat exchange through the heat transfer oil.

[0051] The heat transfer oil that has undergone heat exchange in the heat exchange tube 201 will flow back to the guide tube 210 along the return branch oil pipe 208 and the return main oil pipe 209. After being filtered by the filter screen 211, it will be transported to the heat dissipation tube 202. At this time, by controlling the operation of multiple sets of cooling fans 302 to accelerate the air circulation in the cooling water tank 301, the heat exchange tube 201 will be air-cooled. Cooling water will be supplied to the water supply pipe 305, and the heat dissipation tube 202 will be water-cooled by spraying cooling water onto it through multiple sets of nozzles 304. The cooled heat transfer oil can then re-enter the heat exchange tube 201 to cool the barrel 1 and the screw 101.

[0052] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A cooling device for a twin-screw extruder, characterized in that, include: A barrel (1) is provided with a pair of meshing screws (101) inside the barrel (1). A circulating oil cooling assembly (2) is disposed on the outside of the barrel (1). The circulating oil cooling assembly (2) includes several sets of heat exchange tubes (201), a circulation pipeline, a heat dissipation pipe (202), and a filter guide component. Several sets of heat exchange tubes (201) are disposed inside the barrel (1). The circulation pipeline is used to circulate and transport heat transfer oil to several sets of heat exchange tubes (201). The heat dissipation pipe (202) is disposed on one side of the barrel (1). The filter guide component is used to filter impurities from the heat transfer oil. A water-cooling assembly (3) is disposed on one side of the material cylinder (1). The water-cooling assembly (3) includes a cooling water tank (301), multiple sets of cooling fans (302) and a spray water-cooling component. The cooling water tank (301) is sleeved on the outside of the heat dissipation pipe (202). The multiple sets of cooling fans (302) are fixedly disposed on the outside of the cooling water tank (301). The spray water-cooling component is disposed above the heat dissipation pipe (202) and is used to perform water-cooling heat dissipation on the heat dissipation pipe (202).

2. The cooling device for a twin-screw extruder according to claim 1, characterized in that: Several sets of heat exchange tubes (201) are fixedly connected at both ends to a liquid inlet pipe (203) and a liquid outlet pipe (204), and the liquid inlet pipe (203) and the liquid outlet pipe (204) are both installed through the material cylinder (1).

3. The cooling device for a twin-screw extruder according to claim 2, characterized in that: The circulation pipeline includes a circulating oil pump (205), a main oil delivery pipe (206), and multiple branch oil delivery pipes (207). The circulating oil pump (205) is fixedly installed above the cooling water tank (301). The inlet of the circulating oil pump (205) is connected to the outlet of the heat dissipation pipe (202). The inlet of the main oil delivery pipe (206) is fixedly connected to the outlet of the circulating oil pump (205). The two ends of the multiple branch oil delivery pipes (207) are respectively connected to the outlet of the main oil delivery pipe (206) and the liquid filling pipe (203).

4. The cooling device for a twin-screw extruder according to claim 3, characterized in that: The circulation pipeline also includes multiple return branch oil pipes (208) and a return main oil pipe (209). One end of each of the multiple return branch oil pipes (208) is connected to the liquid outlet pipe (204), and the other end of the return main oil pipe (209) is connected to the multiple return branch oil pipes (208).

5. The cooling device for a twin-screw extruder according to claim 4, characterized in that: The impurity filtering and guiding component includes a guide cylinder (210) and a filter screen cylinder (211). The guide cylinder (210) is connected to the return main oil pipe (209), and the filter screen cylinder (211) is fixedly installed inside the guide cylinder (210).

6. The cooling device for a twin-screw extruder according to claim 5, characterized in that: The filter screen cylinder (211) divides the guide cylinder (210) into a dust filter chamber and a return chamber. The return main oil pipe (209) is connected to the dust filter chamber, and the inlet of the heat dissipation pipe (202) is connected to the return chamber.

7. The cooling device for a twin-screw extruder according to claim 1, characterized in that: The spray water cooling component includes a spray plate (303), multiple sets of nozzles (304) and a water supply pipe (305). The spray plate (303) is a hollow component. The multiple sets of nozzles (304) are evenly and fixedly arranged below the spray plate (303), and the water supply pipe (305) is fixedly arranged above the spray plate (303).

8. The cooling device for a twin-screw extruder according to claim 7, characterized in that: A drain pipe (306) is fixedly connected to one side of the cooling water tank (301).

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