Horizontal double-shaft devolatilization machine for high-viscosity polymer

Abstract

The invention relates to the technical field of devolatilization machines, and discloses a horizontal double-shaft devolatilization machine for high-viscosity polymers, which comprises a motor, a transmission case, a transmission gear set box and a machine barrel, the motor is connected with the transmission case and is connected with a gear in the transmission gear set box through the transmission case, and the machine barrel is connected with the transmission gear set box. At least two stirring screw rods are arranged in the machine barrel, each stirring screw rod comprises a devolatilization main shaft, a plurality of supporting discs are arranged on the devolatilization main shafts in a sleeving manner, a plurality of stirring blades are uniformly distributed on the supporting discs, and the devolatilization main shafts are connected with gears in a transmission gear set box. The devolatilization efficiency can be remarkably improved, the inclined stirring blades and the disturbance protrusions are combined to form a continuously updated thin film, the surface area of unit volume is increased, and the escape rate of volatile components is increased.

Description

Technical Field

[0001] This invention relates to the field of devolatilization technology, and more specifically to a horizontal biaxial devolatilization machine for high-viscosity polymers. Background Technology

[0002] High-viscosity polymers often leave behind volatile substances such as monomers and solvents during the production process. These volatile substances can affect the performance and quality of the product. Therefore, it is necessary to perform devolatilization treatment on high-viscosity polymers.

[0003] Currently, commonly used devolatilization equipment includes single-screw extruders, twin-screw extruders, and stirred tanks. Among them, twin-screw extruders have advantages such as good mixing effect and high heat transfer efficiency, and are widely used in the devolatilization process of high-viscosity polymers. However, traditional twin-screw extruders are prone to problems such as material retention and low conveying efficiency when processing high-viscosity polymers, resulting in poor devolatilization effect. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a horizontal biaxial devolatilization machine for high-viscosity polymers, which enables high-viscosity polymers to quickly form and renew films under low-pressure conditions, thereby improving devolatilization efficiency, reducing material retention, and achieving stable and continuous conveying.

[0005] To achieve the above objectives, the technical solution of the present invention is: a horizontal biaxial devolatilization machine for high-viscosity polymers, comprising a motor, a transmission box, a transmission gear set box, and a barrel. The motor is connected to the transmission box and, through the transmission box, to gears within the transmission gear set box. The barrel is connected to the transmission gear set box. At least two stirring screws are provided inside the barrel. Each stirring screw includes a devolatilization main shaft. Several support discs are sleeved on the devolatilization main shaft, and several stirring blades are evenly distributed on the support discs. The devolatilization main shaft is connected to gears within the transmission gear set box.

[0006] Furthermore, the two ends of the devouring spindle are connected to the barrel via a first bearing.

[0007] Furthermore, a sealing ring is provided at the connection between the devouring spindle and the barrel, and a second bearing is provided at one end of the drive gearbox connected to the devouring spindle, the second bearing being connected to the drive gearbox.

[0008] Furthermore, the support plate is connected to the devolatilization spindle via a flat key, the stirring blade is welded to the support plate, and the angle between the stirring blade and the central axis of the devolatilization spindle is 5° to 30°.

[0009] Furthermore, the machine barrel includes an upper machine barrel and a lower machine barrel, the upper machine barrel is provided with a feed inlet, and the lower machine barrel is provided with a discharge outlet at its end.

[0010] Furthermore, the upper cylinder is provided with several vacuum holes.

[0011] Furthermore, several protrusions are provided on the inner wall of the lower barrel.

[0012] Furthermore, a gear is sleeved on the devouring spindle, and the gears between two adjacent devouring spindles mesh with each other.

[0013] Furthermore, an inner rod is fitted onto the stirring screw, and the inner rod is fixed outside the barrel.

[0014] Furthermore, it also includes a frame, on which the motor, transmission box and transmission gear set box are all fixed, and the barrel is connected to the frame via a fixing bracket.

[0015] The beneficial effects of this invention are: (1) Significantly improves devolatilization efficiency: The tilted stirring blades and the disturbance protrusions combine to form a continuously renewed film, increasing the surface area per unit volume and improving the escape rate of volatile components; (2) Reduce material retention: The disturbance protrusions and meshing mixing structure reduce wall adhesion and local retention; (3) Improve conveying stability: The twin-shaft meshing structure enables stable propulsion, which is suitable for continuous processing of high-viscosity systems; (4) Strong process adaptability: Multiple vacuum holes are arranged to adjust the operating parameters for materials with different viscosities and volatile properties; (5) Reliable structure and easy maintenance: The support plate is connected to the main spindle by a key, and the design of bearing support and sealing ring improves reliability and facilitates disassembly and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the barrel of the present invention; Figure 3 This is a schematic diagram of the stirring screw structure; Figure 4 This is a schematic diagram of the support plate and stirring blades; Figure 5 This is a schematic diagram of the inner wall structure of the lower barrel.

[0017] In the diagram: 1. Motor; 2. Transmission box; 3. Transmission gear set box; 4. Upper barrel; 5. Lower barrel; 6. Feed inlet; 7. Discharge outlet; 8. Vacuum hole; 9. Fixing frame; 10. Right stirring screw; 11. Left stirring screw; 12. Inner tube fixing; 13. Sealing ring; 14. First bearing; 15. Detached spindle; 16. Stirring blades; 17. Support plate; 18. Protrusion; 19. Frame; 20. Second bearing; 21. Gear. Detailed Implementation

[0018] Example:

[0019] like Figures 1 to 5 As shown, a horizontal biaxial devolatilization machine for high-viscosity polymers includes a motor 1, a transmission box 2, a transmission gear set box 3, a barrel, and a frame 19. The motor 1, transmission box 2, and transmission gear set box 3 are all fixed to the frame 19. The motor 1 is connected to the transmission box 2 and, through the transmission box 2, to gears within the transmission gear set box 3. The barrel is connected to the transmission gear set box 3. Two stirring screws, a right stirring screw 10 and a left stirring screw 11, are installed inside the barrel. Each stirring screw includes a devolatilization main shaft 15. Several support discs 17 are fitted onto the devolatilization main shaft 15. The support discs 17 are connected to the devolatilization main shaft 15 via flat keys. Six stirring blades 16 are evenly welded onto each support disc 17. The angle between the stirring blades 16 and the central axis of the devolatilization main shaft 15 is 15° to facilitate material transport. The tilt angle of the stirring blades 16 guides the material forward, reducing the material's residence time in the barrel and improving production efficiency. The detached spindle 15 is connected to the gears in the transmission gearbox 3.

[0020] The two ends of the devouring main shaft 15 are connected to the machine barrel via first bearings 14. The first bearings 14 support and stabilize the devouring main shaft 15, reducing shaft vibration and offset, and ensuring stable machine operation. A sealing ring 13 is provided at the connection between the devouring main shaft 15 and the machine barrel to prevent material leakage.

[0021] The barrel includes an upper barrel 4 and a lower barrel 5. The upper barrel 4 is provided with a feed inlet 6 and three vacuum holes 8. The vacuum holes 8 are used to connect a vacuum pump to achieve depressurization and devolatilization. The lower barrel 5 is provided with a discharge port 7 at its end. The inner wall of the lower barrel 5 is provided with several protrusions 18. The lower barrel 5 is connected to the frame 19 through a fixing bracket 9.

[0022] A gear 21 and a second bearing 20 are fitted onto the devouring main shaft 15. The gears 21 between the two devouring main shafts 15 mesh with each other and rotate synchronously in the same direction, achieving thorough mixing and conveying of the material. The gear 21 is located inside the transmission gear set box 3, and the second bearing 20 is connected to the transmission gear set box 3. A 352C series double-flow inner tube fixing 12 is fitted onto the stirring screw, and the inner tube fixing 12 is located outside the barrel.

[0023] Working principle: The high-viscosity polymer enters the upper barrel 4 through the feed inlet 6. Driven by the rotation of the inclined stirring blades 16, the material is conveyed to the lower barrel 5. Inside the lower barrel 5, the material is agitated by the inner wall protrusions 18, increasing its surface area. Simultaneously, the vacuum pump creates a vacuum inside the barrel through the vacuum port 8, lowering the boiling point of volatile substances and promoting their escape. The fully volatilized material is discharged from the discharge port 7.

[0024] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

[0025] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

Claims

1. A horizontal biaxial devolatilization machine for high-viscosity polymers, characterized in that: The device includes a motor (1), a transmission box (2), a transmission gear set box (3), and a barrel. The motor (1) is connected to the transmission box (2) and is connected to the gears in the transmission gear set box (3) through the transmission box (2). The barrel is connected to the transmission gear set box (3). The barrel is provided with at least two stirring screws. The stirring screws include a devouring main shaft (15). Several support discs (17) are sleeved on the devouring main shaft (15). Several stirring blades (16) are evenly distributed on the support discs (17). The devouring main shaft (15) is connected to the gears in the transmission gear set box (3).

2. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 1, characterized in that: The two ends of the devouring spindle (15) are connected to the barrel through the first bearing (14).

3. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 2, characterized in that: A sealing ring (13) is provided at the connection between the devouring spindle (15) and the barrel. A second bearing (20) is provided at one end of the drive gearbox (3) of the devouring spindle (15), and the second bearing (20) is connected to the drive gearbox (3).

4. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 1, characterized in that: The support plate (17) is connected to the devouring spindle (15) via a flat key. The stirring blade (16) is welded to the support plate (17). The angle between the stirring blade (16) and the central axis of the devouring spindle (15) is 5° to 30°.

5. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 1, characterized in that: The machine barrel includes an upper machine barrel (4) and a lower machine barrel (5). The upper machine barrel (4) is provided with a feed inlet (6), and the lower machine barrel (5) is provided with a discharge outlet (7) at its end.

6. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 5, characterized in that: The upper cylinder (4) is provided with several vacuum holes (8).

7. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 5, characterized in that: Several protrusions (18) are provided on the inner wall of the lower cylinder (5).

8. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 1, characterized in that: Gears (21) are fitted onto the devouring spindle (15), and the gears (21) between two adjacent devouring spindles (15) mesh with each other.

9. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 1, characterized in that: An inner rod fixing (12) is sleeved on the stirring screw, and the inner rod fixing (12) is located outside the barrel.

10. The horizontal biaxial devolatilization machine for high-viscosity polymers according to claim 1, characterized in that: It also includes a frame (19), the motor (1), transmission box (2) and transmission gear set box (3) are all fixed on the frame (19), and the barrel is connected to the frame (19) through a fixing frame (9).

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