Temperature control device of screw extruder

Abstract

The utility model discloses a screw extruder temperature control device which comprises a screw extruder body, a screw is installed on the screw extruder body, the inside of the screw is hollow, cooling oil is controlled to enter a U-shaped pipe through a first oil inlet pipe or a second oil inlet pipe, and the cooling oil is discharged from an oil outlet hole in the U-shaped pipe. Along with flowing of the cooling oil, the cooling oil flows from the discharging end position, corresponding to the screw extruder body, of the screw to the feeding position, corresponding to the screw extruder body, of the screw, enters the U-shaped pipe through an oil inlet hole of the U-shaped pipe and flows into the oil storage tank again through the first oil outlet pipe or the second oil outlet pipe of the pipeline; the cooling oil in the first cavity and the second cavity is intermittently used for sequentially cooling the interior of the whole screw rod, so that gradual cooling from one end to the other end of the interior of the whole screw rod is achieved, the cooling effect on the whole screw rod is improved, and the cooling effect on the whole screw rod is improved by intermittently using the cooling oil in the first cavity and the second cavity for sequentially cooling the interior of the whole screw rod.

Description

Technical Field

[0001] This utility model relates to the field of screw extruder technology, specifically to a screw extruder temperature control device. Background Technology

[0002] A screw extruder is a device that gradually transforms the rubber compound's motion into a linear motion as the screw rotates, pushing it towards the die head and cooperating with the machine body to compress, heat, soften, and mix the rubber compound. The screw extruder heats the material fed into the barrel through an external heating jacket, and then conveys it forward under the push of the rotating screw. During the material conveying process, the heating jacket indirectly heats the screw, and the screw temperature rises continuously as the material temperature increases, causing product instability during production.

[0003] In the "Temperature Control Device for a Sheet Extruder Screw" authorized by publication number "CN212331759U", a temperature sensor is installed to sense the temperature information inside the screw and transmit it to the controller. When the temperature is high, the controller automatically controls the pump to work. At this time, oil is drawn in through the oil inlet pipe, and then the cooling oil enters the air guide shroud and then enters two liquid guide pipes. After entering the two screws, the cooling oil flows from the left end of the screw into the mounting cover and then flows back to the oil storage tank through the return pipe, thus automatically cooling the screw. However, in use, only the cooling oil in one oil storage tank cools the inside of the screw. After a period of cooling, the temperature of the cooling oil in the oil storage tank will rise and fall, affecting the cooling effect on the inside of the screw. At the same time, the cooling oil enters the inside of the screw from one end through the liquid guide pipe, which is also the outlet of the cooling oil. This results in poor cooling effect of the cooling oil on the entire screw. Utility Model Content

[0004] The purpose of this invention is to provide a temperature control device for a screw extruder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a temperature control device for a screw extruder, comprising a screw extruder body, a screw mounted on the screw extruder body, the screw having a hollow interior, one end of the screw passing through a reducer, a temperature sensor fixedly mounted on the screw extruder body near the feed position, a sealing ring rotatably mounted on one end of the screw via a mechanical seal, a U-shaped tube installed inside the sealing ring, the U-shaped tube being located inside the entire screw, oil outlet holes being equidistantly opened in the middle of the U-shaped tube, the oil outlet holes being located at the discharge end of the screw corresponding to the screw extruder body, oil inlet holes being equidistantly opened at the oil outlet end of the U-shaped tube, an oil storage tank mounted on one side of the screw extruder body, the oil storage tank having a first chamber and a second chamber inside, the cooling oil inside the first chamber and the second chamber being intermittently supplied to the interior of the U-shaped tube.

[0006] As a further preferred embodiment of this technical solution, an oil pump is fixedly installed on the oil storage tank, a first oil inlet pipe is fixedly installed on the inlet end of the oil pump, one end of the first oil inlet pipe is located inside the first chamber, a connecting pipe is fixedly installed between the outlet end of the oil pump and the inlet end of the U-shaped tube, a first solenoid valve is installed on the first oil inlet pipe, a first oil outlet pipe is fixedly installed on the outlet end of the U-shaped tube, one end of the first oil outlet pipe is located inside the first chamber, and a second solenoid valve is fixedly installed on the first oil outlet pipe.

[0007] As a further preferred embodiment of this technical solution, a second oil inlet pipe is connected to the first oil inlet pipe, the second oil inlet pipe is connected to the interior of the second chamber, a third solenoid valve is fixedly installed on the second oil inlet pipe, a second oil outlet pipe is connected to the first oil outlet pipe, the second oil outlet pipe is connected to the interior of the second chamber, and a fourth solenoid valve is fixedly installed on the second oil outlet pipe.

[0008] As a further preferred embodiment of this technical solution, the top of the oil storage tank corresponding to the first chamber and the top of the second chamber are rotatably mounted with a rotating shaft, and the bottom of the rotating shaft is fixedly mounted with a stirring blade.

[0009] As a further preferred embodiment of this technical solution, a pulley is fixedly installed on the top of the rotating shaft, a transmission belt is installed between the two pulleys, and a motor is fixedly installed on the top of the oil tank corresponding to the top position of one of the rotating shafts, with the output end of the motor fixedly connected to the top of one of the rotating shafts.

[0010] As a further preferred embodiment of this technical solution, the oil storage tank has heat dissipation holes at the top of both the first and second chambers.

[0011] As a further preferred embodiment of this technical solution, a controller is fixedly installed on the oil storage tank.

[0012] This utility model provides a temperature control device for a screw extruder, which has the following beneficial effects:

[0013] (1) This utility model detects the temperature information of the screw near the feeding position of the screw extruder body by a temperature sensor and transmits it to the controller. When the screw temperature is high, the cooling oil is controlled to enter the U-shaped tube through the first oil inlet pipe or the second oil inlet pipe. The cooling oil is discharged at the oil outlet in the U-shaped tube. As the cooling oil flows, the cooling oil will flow from the discharge end of the screw corresponding to the screw extruder body to the feeding position of the screw corresponding to the screw extruder body. The cooling oil will enter the interior of the U-shaped tube through the oil inlet hole of the U-shaped tube and flow back into the oil storage tank through the first oil outlet pipe or the second oil outlet pipe, thereby achieving gradual cooling of the interior of the entire screw from one end to the other and improving the cooling effect of the entire screw.

[0014] (2) This utility model controls the cooling oil inside the first chamber to enter the U-shaped tube through the first oil inlet pipe and the connecting pipe to cool the entire screw first. Then, it controls the cooling oil inside the second chamber to enter the U-shaped tube through the second oil inlet pipe and the connecting pipe to cool the entire screw again. By intermittently using the cooling oil inside the first chamber and the second chamber to cool the entire screw in sequence, the cooling effect of the entire screw is improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is one of the partial cross-sectional structural schematic diagrams of this utility model;

[0018] Figure 4 This is the second partial cross-sectional structural schematic diagram of the present invention;

[0019] In the diagram: 1. Screw extruder body; 2. Screw; 3. Sealing ring; 4. U-tube; 5. Oil outlet; 6. Oil inlet; 7. Oil tank; 8. First chamber; 9. Second chamber; 10. Oil pump; 11. First oil inlet pipe; 12. Connecting pipe; 13. First solenoid valve; 14. First oil outlet pipe; 15. Second solenoid valve; 16. Second oil inlet pipe; 17. Third solenoid valve; 18. Second oil outlet pipe; 19. Fourth solenoid valve; 20. Rotary shaft; 21. Agitator blade; 22. Pulley; 23. Drive belt; 24. Motor; 25. Heat dissipation hole; 26. Controller. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides a technical solution: such as Figures 1 to 4 As shown in this embodiment, a screw extruder temperature control device includes a screw extruder body 1, on which a screw 2 is mounted. The screw 2 is hollow inside, and one end of the screw 2 passes through a reducer. A temperature sensor is fixedly installed on the screw extruder body 1 near the feed position. A sealing ring 3 is rotatably mounted on one end of the screw 2 via a mechanical seal. A U-shaped tube 4 is installed inside the sealing ring 3, and the U-shaped tube 4 is located inside the entire screw 2. Oil outlet holes 5 are equidistantly opened in the middle of the U-shaped tube 4. The oil outlet 5 is located at the discharge end of the screw 2 corresponding to the screw extruder body 1. The oil outlet end of the U-tube 4 has oil inlet holes 6 spaced evenly. An oil storage tank 7 is installed on one side of the screw extruder body 1. The oil storage tank 7 has a first chamber 8 and a second chamber 9 inside. Cooling oil from the first chamber 8 and the second chamber 9 is intermittently supplied to the interior of the U-tube 4. A controller 26 is fixedly installed on the oil storage tank 7. A temperature sensor detects the temperature information of the screw 2 near the feed position on the screw extruder body 1 and transmits it to the controller 26. When the screw 2 is at a high temperature, the cooling oil is controlled to enter the U-tube 4 through the first oil inlet pipe 11 or the second oil inlet pipe 16. The cooling oil is discharged at the oil outlet 5 in the U-tube 4. As the cooling oil flows, it will flow from the discharge end of the screw 2 corresponding to the screw extruder body 1 to the feeding end of the screw 2 corresponding to the screw extruder body 1. The cooling oil will enter the interior of the U-tube 4 through the oil inlet 6 and flow back into the oil storage tank 7 through the first oil outlet pipe 14 or the second oil outlet pipe 18, thus achieving cooling of the entire interior of the screw 2 from one end to the other. The gradual cooling at one end improves the cooling effect on the entire screw 2. By controlling the cooling oil inside the first chamber 8 to enter the U-shaped tube 4 through the first oil inlet pipe 11 and the connecting pipe 12, the entire screw 2 is cooled first. Then, by controlling the cooling oil inside the second chamber 9 to enter the U-shaped tube 4 through the second oil inlet pipe 16 and the connecting pipe 12, the entire screw 2 is cooled again. By intermittently using the cooling oil inside the first chamber 8 and the second chamber 9 to cool the entire screw 2 in sequence, the cooling effect on the entire screw 2 is improved.

[0022] like Figures 1 to 4As shown, an oil pump 10 is fixedly installed on the oil storage tank 7. A first oil inlet pipe 11 is fixedly installed at the inlet end of the oil pump 10. One end of the first oil inlet pipe 11 is located inside the first chamber 8. A connecting pipe 12 is fixedly installed between the outlet end of the oil pump 10 and the inlet end of the U-shaped pipe 4. A first solenoid valve 13 is installed on the first oil inlet pipe 11. A first oil outlet pipe 14 is fixedly installed at the outlet end of the U-shaped pipe 4. One end of the first oil outlet pipe 14 is located inside the first chamber 8. A second solenoid valve 15 is fixedly installed on the first oil outlet pipe 14. A second oil inlet pipe 16 is connected to the first oil inlet pipe 11 and is connected to the interior of the second chamber 9. A third solenoid valve 17 is fixedly installed on the second oil inlet pipe 16. A second oil outlet pipe 18 is connected to the first oil outlet pipe 14 and is connected to the interior of the second chamber 9. A fourth solenoid valve 19 is fixedly installed on the second oil outlet pipe 18.

[0023] The controller 26 closes the first solenoid valve 13 and the second solenoid valve 15, and simultaneously controls the third solenoid valve 17 and the fourth solenoid valve 19 to open. Through the operation of the oil pump 10, the cooling oil inside the second chamber 9 enters the U-tube 4 through the second oil inlet pipe 16 and the connecting pipe 12. The cooling oil is discharged at the oil outlet 5 in the U-tube 4. As the cooling oil flows, it will flow from the discharge end of the screw 2 corresponding to the screw extruder body 1 to the feeding end of the screw 2 corresponding to the screw extruder body 1. The cooling oil will enter the interior of the U-tube 4 through the oil inlet 6 of the U-tube 4, and then flow back into the interior of the second chamber 9 through the second oil outlet pipe 18, thereby achieving gradual cooling of the entire screw 2 from one end to the other.

[0024] like Figures 1 to 4 As shown, the top of the oil storage tank 7 is rotatably mounted with a rotating shaft 20 corresponding to the top of the first chamber 8 and the second chamber 9. A stirring blade 21 is fixedly mounted at the bottom of the rotating shaft 20. A pulley 22 is fixedly mounted at the top of the rotating shaft 20. A transmission belt 23 is installed between the two pulleys 22. A motor 24 is fixedly mounted at the top of the oil storage tank 7 corresponding to the top position of one of the rotating shafts 20. The output end of the motor 24 is fixedly connected to the top of one of the rotating shafts 20.

[0025] The motor 24 drives one of the rotating shafts 20 to rotate. The transmission belt 23 drives the two pulleys 22 to rotate simultaneously, which in turn drives the stirring blades 21 inside the first chamber 8 and the second chamber 9 to rotate simultaneously. This stirs the cooling oil inside the first chamber 8 and the second chamber 9, accelerates the heat dissipation of the cooling oil, and indirectly improves the heat dissipation effect.

[0026] like Figures 1 to 4As shown, the top of the oil tank 7 corresponding to the first chamber 8 and the second chamber 9 is provided with heat dissipation holes 25, and a dustproof net is fixedly installed on the oil tank 7 at the position corresponding to the heat dissipation holes 25.

[0027] The heat dissipation holes 25 can quickly dissipate heat from the cooling oil inside the first chamber 8 and the second chamber 9.

[0028] This utility model provides a temperature control device for a screw extruder, the specific working principle of which is as follows:

[0029] When the device is in use, the temperature information of the screw 2 near the feeding position of the screw extruder body 1 is detected by the temperature sensor and transmitted to the controller 26. When the temperature of the screw 2 is high, the controller 26 automatically controls the oil pump 10 to work, and at the same time controls the first solenoid valve 13 and the second solenoid valve 15 to open. The cooling oil inside the first chamber 8 enters the U-shaped tube 4 through the first oil inlet pipe 11 and the connecting pipe 12. The cooling oil is discharged at the oil outlet 5 in the U-shaped tube 4. As the cooling oil flows, the cooling oil will flow from the discharge end of the screw 2 corresponding to the screw extruder body 1 to the feeding position of the screw 2 corresponding to the screw extruder body 1. The cooling oil will enter the interior of the U-shaped tube 4 through the oil inlet 6 of the U-shaped tube 4, and flow back into the interior of the first chamber 8 through the first oil outlet pipe 14, so as to achieve gradual cooling of the interior of the entire screw 2 from one end to the other, thereby improving the cooling effect of the entire screw 2.

[0030] After the cooling oil inside the first chamber 8 is used to cool the entire screw 2 for a period of time, the first solenoid valve 13 and the second solenoid valve 15 are closed by the controller 26, and the third solenoid valve 17 and the fourth solenoid valve 19 are opened at the same time. Through the operation of the oil pump 10, the cooling oil inside the second chamber 9 enters the U-tube 4 through the second oil inlet pipe 16 and the connecting pipe 12. The cooling oil is discharged at the oil outlet 5 in the U-tube 4. As the cooling oil flows, the cooling oil will flow from the discharge end of the screw 2 corresponding to the screw extruder body 1 to the feeding end of the screw 2 corresponding to the screw extruder body 1. The cooling oil will enter the interior of the U-tube 4 through the oil inlet 6 of the U-tube 4, and flow back into the interior of the second chamber 9 through the second oil outlet pipe 18, so as to achieve gradual cooling of the interior of the entire screw 2 from one end to the other.

[0031] During the cooling process of the screw 2 using the cooling oil inside the first chamber 8 and the second chamber 9, the motor 24 drives one of the rotating shafts 20 to rotate. The transmission belt 23 drives the two pulleys 22 to rotate simultaneously, which in turn drives the stirring blades 21 inside the first chamber 8 and the second chamber 9 to rotate simultaneously. This stirs the cooling oil inside the first chamber 8 and the second chamber 9, accelerates the heat dissipation of the cooling oil, and indirectly improves the heat dissipation effect.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw extruder temperature control device, comprising a screw extruder body (1), a screw (2) is installed on the screw extruder body (1), the inside of the screw (2) is hollow, one end of the screw (2) passes through a speed reducer, and a temperature sensor is fixedly installed on the screw extruder body (1) near a feeding position, characterized in that: One end of the screw rod (2) is rotatably installed with a sealing ring (3) through a mechanical seal, the inside of the sealing ring (3) is installed with a U-shaped pipe (4), the U-shaped pipe (4) is arranged inside the whole screw rod (2), the middle part of the U-shaped pipe (4) is equidistantly provided with an oil outlet hole (5), the oil outlet hole (5) is arranged at the position of the discharge end of the screw rod (2) corresponding to the screw rod extruder body (1), the oil outlet end of the U-shaped pipe (4) is equidistantly provided with an oil inlet hole (6), one side of the screw rod extruder body (1) is installed with an oil storage tank (7), the inside of the oil storage tank (7) is provided with a first cavity (8) and a second cavity (9), the cooling oil inside the first cavity (8) and the second cavity (9) is intermittently conveyed to the inside of the U-shaped pipe (4). ​ 2. A screw extruder temperature control device according to claim 1, characterised in that: The oil storage tank (7) is fixedly installed with an oil pump (10), the liquid inlet end of the oil pump (10) is fixedly installed with a first oil inlet pipe (11), one end of the first oil inlet pipe (11) is arranged inside the first cavity (8), the liquid outlet end of the oil pump (10) and the oil inlet end of the U-shaped pipe (4) are fixedly installed with a communication pipe (12), the first oil inlet pipe (11) is installed with a first electromagnetic valve (13), the oil outlet end of the U-shaped pipe (4) is fixedly installed with a first oil outlet pipe (14), one end of the first oil outlet pipe (14) is arranged inside the first cavity (8), the first oil outlet pipe (14) is fixedly installed with a second electromagnetic valve (15).

3. A screw extruder temperature control device according to claim 2, wherein: The first oil inlet pipe (11) is communicated and installed with a second oil inlet pipe (16), the second oil inlet pipe (16) is communicated and arranged inside the second cavity (9), the second oil inlet pipe (16) is fixedly installed with a third electromagnetic valve (17), the first oil outlet pipe (14) is communicated and installed with a second oil outlet pipe (18), the second oil outlet pipe (18) is communicated and arranged inside the second cavity (9), the second oil outlet pipe (18) is fixedly installed with a fourth electromagnetic valve (19).

4. A screw extruder temperature control device according to claim 1, wherein: The top end of the oil storage tank (7) corresponding to the first cavity (8) and the second cavity (9) is rotatably installed with a rotating shaft (20), the bottom of the rotating shaft (20) is fixedly installed with a stirring blade (21).

5. A screw extruder temperature control device according to claim 4, wherein: The top of the rotating shaft (20) is fixedly installed with a belt pulley (22), the transmission belt (23) is drivingly installed between the two belt pulleys (22), the top of the oil storage tank (7) is fixedly installed with a motor (24) corresponding to the top of one of the rotating shafts (20), and the output end of the motor (24) is fixedly connected with the top of one of the rotating shafts (20).

6. A screw extruder temperature control device according to claim 4, wherein: The top end of the oil storage tank (7) corresponding to the first cavity (8) and the second cavity (9) is provided with a heat dissipation hole (25).

7. A screw extruder temperature control device according to claim 6, wherein: The oil storage tank (7) is fixedly installed with a controller (26).

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