Extruder with backflow prevention exhaust device
By adding a heating chamber and a heater to the exhaust device of the extruder, the reflux of condensate is avoided, and the problem of condensate reflux during the exhaust process of the extruder is solved, and the product quality and exhaust efficiency are improved.
Patent Information
- Application Number
- CN202422169978.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-05
AI Technical Summary
During the exhaust process of the extruder, the gasified solvent is easily refluxed into the extruder barrel after condensed, resulting in defects such as air gaps, bubbles, scars, etc.
An extruder with an anti-return exhaust device is designed, including a heating chamber above the exhaust chamber, and a heater and an inclined exhaust pipe are installed on the side wall of the heating chamber to avoid the reflux of condensate.
Through the design of the heating chamber and heater, the reflux of the condensate is avoided, the problem of reflux after solvent condensation is solved, the quality of the product and exhaust efficiency are improved, and the structure is simple and the cost is low.
Smart Images
Figure CN222972733U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of an exhaust device of an extruder, in particular to an extruder with an anti-backflow exhaust device. Background Art
[0002] An extruder is one of the main devices for polymer processing. During the process of polymer processing using an extruder, exhaust is often required. The sources of gas include air, moisture, and residual solvents entrained in the particles. These gases must be exhausted. Otherwise, defects such as internal or surface air gaps, bubbles, and scars may appear in the extruded product, and the physical and chemical properties may also be affected. During the extrusion process, the above-mentioned gases are sucked away by a negative pressure device from the exhaust port of the extruder barrel, but the situation of the condensed vaporized solvent flowing back often occurs. Content of the Utility Model
[0003] Aiming at the problem of the condensed vaporized solvent flowing back in the prior art solution, the utility model provides an extruder with an anti-backflow exhaust device.
[0004] The utility model provides the following technical solution: An extruder with an anti-backflow exhaust device includes an extruder barrel. An exhaust chamber is arranged at the top of the extruder barrel. The exhaust chamber is communicated with the inner cavity of the extruder barrel. A heating chamber is arranged at the top of the exhaust chamber. The top opening of the exhaust chamber protrudes from the bottom surface of the heating chamber. A heater and an exhaust pipe are arranged on the side wall of the heating chamber. The exhaust pipe is communicated with the bottom of the heating chamber and the exhaust pipe extends obliquely downward.
[0005] Preferably, the heater is an electric heater, and a heat insulation layer is also covered on the outer wall of the heating chamber.
[0006] Preferably, the extending direction of the bottom surface of the heating chamber is the same as that of the exhaust pipe.
[0007] Preferably, the included angle between the central axis of the exhaust pipe and the horizontal plane is 10° to 20°.
[0008] Preferably, it further includes a liquid accumulation tank. The exhaust pipe is connected to the bottom of the liquid accumulation tank. An air extraction pipe is arranged at the top of the liquid accumulation tank. The air extraction pipe is connected with a negative pressure device. A drain valve is also arranged at the bottom of the liquid accumulation tank.
[0009] Preferably, the top of the heating chamber is detachably connected with a cover.
[0010] The beneficial effect of the utility model is that a heating chamber is added above the exhaust chamber, a heater is added to avoid condensation, the structures of the exhaust chamber and the exhaust pipe are optimized, so that the generated condensate leaves from the exhaust pipe, and the condensate is prevented from flowing back to the inside of the extruder barrel through the exhaust chamber, solving the problem of the solvent flowing back after condensation, and the structure is simple and the cost is low. Description of the Drawings
[0011] Figure 1 A three-dimensional schematic diagram of an embodiment of an extruder.
[0012] Figure 2 A three-dimensional schematic diagram of another embodiment of an extruder.
[0013] Reference numerals: 10, exhaust chamber; 20, heating chamber; 21, heater; 22, cover; 30, exhaust pipe; 40, liquid accumulation tank; 41, suction pipe. Detailed implementation manners
[0014] The following further describes the implementation manners of the present utility model in conjunction with the accompanying drawings and reference numerals, so that those skilled in the art can implement it after studying this specification. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0015] The present utility model provides an extruder with an anti-backflow exhaust device, including an extruder barrel. An exhaust chamber 10 is provided at the top of the extruder barrel, and the exhaust chamber 10 is communicated with the inner cavity of the extruder barrel. Referring to the related art, a screw is provided in the inner cavity of the extruder barrel. The material is sheared by the screw, and volatile substances such as solvents are vaporized, separated from the material and diffused outwards, and discharged through the exhaust chamber 10 under the action of negative pressure.
[0016] Please refer to Figure 1 , a heating chamber 20 is further provided at the top of the exhaust chamber 10. A heater 21 and an exhaust pipe 30 are provided on the side wall of the heating chamber 20. The top of the heating chamber 20 is detachably connected with a cover 22, which is convenient for maintenance and repair. Specifically, the heater 21 can adopt an electric heater, which is used to maintain or increase the temperature in the heating chamber 20 and the exhaust chamber 10, and avoid the condensation of the vaporized solvent in the exhaust chamber 10 and the heating chamber 20 above it. The top opening of the exhaust chamber 10 protrudes from the bottom surface of the heating chamber 20, so that even if condensation occurs in the heating chamber 20, the condensate will not flow back to the exhaust chamber 10. The outer wall of the heating chamber 20 is also covered with a heat insulation layer to reduce energy consumption. The exhaust pipe 30 is communicated with the bottom of the heating chamber 20, and the exhaust pipe 30 extends obliquely downwards. If condensate is generated in the heating chamber 20 and the exhaust pipe 30, the condensate will flow away by gravity from the exhaust pipe 30. The extending direction of the bottom surface of the heating chamber 20 can be the same as that of the exhaust pipe 30. Preferably, the included angle α between the central axis of the exhaust pipe 30 and the horizontal plane is 10-20°.
[0017] Furthermore, please refer to Figure 2, in another embodiment, it further includes a condensate tank 40. The exhaust pipe 30 is connected to the bottom of the condensate tank 40. An air extraction pipe 41 is provided at the top of the condensate tank 40, and the air extraction pipe 41 is connected to a negative pressure device. The negative pressure device can be a blower, a vacuum pump, etc., which generates negative pressure to suck gas from the exhaust chamber 10. The condensate flowing out from the exhaust pipe 30 is collected in the condensate tank 40 and will not affect the negative pressure device. A drain valve is also provided at the bottom of the condensate tank 40.
[0018] The above are one or more embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
Claims
1. An extruder with an anti-backflow exhaust device, comprising an extruder barrel, a top of the extruder barrel is provided with an exhaust chamber, the exhaust chamber is communicated with the inner cavity of the extruder barrel, and is characterized in that: A heating chamber is arranged on the top of the exhaust chamber, and an opening on the top of the exhaust chamber protrudes from the bottom surface of the heating chamber. A heater and an exhaust pipe are arranged on the side wall of the heating chamber. The exhaust pipe is connected to the bottom of the heating chamber and extends obliquely downward.
2. The extruder with an anti-backflow exhaust device according to claim 1, characterized in that: The heater is an electric heater, and the outer wall of the heating chamber is also covered with a heat preservation layer.
3. The extruder with an anti-backflow exhaust device according to claim 1, characterized in that: The extension direction of the bottom surface of the heating chamber is the same as that of the exhaust pipe.
4. The extruder with an anti-backflow exhaust device according to claim 1, characterized in that: The angle between the central axis of the exhaust pipe and the horizontal plane is 10-20°.
5. The extruder with an anti-backflow exhaust device according to claim 1, characterized in that: It also includes a liquid storage tank, the exhaust pipe is connected to the bottom of the liquid storage tank, the top of the liquid storage tank is provided with an exhaust pipe, the exhaust pipe is connected to a negative pressure device, and the bottom of the liquid storage tank is also provided with an emptying valve.
6. The extruder with an anti-backflow exhaust device according to claim 1, characterized in that: The top of the heating chamber is detachably connected with a sealing cover.