Split type three-screw extruder

Abstract

The split type three-screw extruder comprises a machine barrel structure and a screw mandrel, the machine barrel structure comprises a lower barrel body and an upper barrel body, one side of the upper barrel body is connected with one side of the lower barrel body through an opening and closing structure, and the opening and closing structure controls the upper barrel body to be turned over and opened relative to the lower barrel body; the opening and closing structure comprises an opening and closing hinge frame and an opening and closing transmission shaft, the opening and closing hinge frame comprises a lower support and an upper support, one end of the lower support is fixedly connected to one side of the lower barrel, one end of the upper support is fixedly connected to one side of the upper barrel, and the opening and closing transmission shaft penetrates through the end of the lower support and the end of the upper support at the same time. The opening and closing transmission shaft serves as a control shaft for opening or closing the upper barrel. The machine barrel structure is divided into the lower barrel body and the upper barrel body along the transverse direction, and the upper barrel body can be turned over to be opened or closed relative to the lower barrel body, so that the machine barrel structure can be integrally opened or closed, the interior of the machine barrel can be greatly conveniently cleaned during maintenance, or the screw core shaft can be directly and conveniently lifted out.

Description

Technical Field

[0001] The utility model relates to the technical field of screw extruders, in particular to a split three-screw extruder. Background Art

[0002] The processing principle of the extruder is: the material is fed into a screw device with heating, stirring and forward conveying. When the screw is screwed in, in addition to continuously screwing the material into the screw groove for continuous forward conveying, the material is gradually melted by the temperature inside the screw groove, and is evenly turned and stirred in the screw groove. After the mixing is completed, it is fed and passed through the mold at the end of the feeding, and extruded into a long strip to form a finished product according to the shape set by the mold. The main structural forms of existing extruders are mainly divided into three categories: single screw, twin screw and multi-screw.

[0003] The refining function of single-screw extruder is very weak. It mainly relies on the friction, extrusion, high-temperature heating and spiral extrusion of the material, screw and barrel for plasticization. Generally, the speed and temperature are high, and the power consumption is high. It will produce a very high back pressure, so the quality of the output is difficult to control and the output is relatively reduced.

[0004] Patent application number CN202011001736.2 discloses a straight-line parallel three-screw extruder, including a frame and a motor, a gear box and a screw sleeve arranged on the frame, wherein a screw assembly is arranged in the screw sleeve, and the screw assembly includes three straight-line parallel screws, and the adjacent screws are meshed. Its defect is that since the screw extruder needs to clean the inside of the screw machine after running for a certain period of time, as in the above patent, its screw machine adopts a segmented screw sleeve axially connected to form the housing of the screw machine, and its internal screw is disassembled and assembled by core pulling. The overall structure is relatively cumbersome during the maintenance process, making the disassembly and assembly during maintenance more time-consuming and laborious.

[0005] In view of the above, it is necessary to propose a split three-screw extruder to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to solve the above technical problems and provide a split three-screw extruder.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a split three-screw extruder, including a barrel structure and a screw core shaft, the barrel structure includes a lower barrel and an upper barrel, the upper barrel is connected to one side of the lower barrel through an opening and closing structure, and the opening and closing structure controls the upper barrel to flip and open relative to the lower barrel; the opening and closing structure includes an opening and closing hinged frame and an opening and closing transmission shaft, the opening and closing hinged frame includes a lower bracket and an upper bracket, one end of the lower bracket is fixedly connected to one side of the lower barrel, and one end of the upper bracket is fixedly connected to one side of the upper barrel, the opening and closing transmission shaft passes through the ends of the lower bracket and the upper bracket at the same time, and the opening and closing transmission shaft serves as a control shaft for opening or closing the upper barrel.

[0008] Furthermore, the barrel structure is fixedly arranged on the frame via a support, one end of the barrel structure is connected to a gear box, and the input end of the gear box is provided with a main motor.

[0009] Furthermore, a feed port is provided at one end of the barrel structure close to the gear box, and a metering feed portion is connected to the upper end of the feed port.

[0010] Furthermore, the metering feeding part includes a feeding hopper, a feeding screw, and a feeding motor. A feeding screw is provided between the lower part of the feeding hopper and the feeding port, and the feeding screw is driven by the feeding motor.

[0011] Furthermore, the opening and closing structure also includes an opening and closing reducer, which is fixedly arranged on the frame, and the output end of the opening and closing reducer is connected to one end of the opening and closing transmission shaft through a coupling.

[0012] Furthermore, a hand wheel is provided at the input end of the opening and closing reducer, and the opening and closing reducer is driven to rotate by the hand wheel.

[0013] Furthermore, a control motor is provided at the input end of the opening and closing reducer, and the control motor drives the opening and closing reducer to rotate.

[0014] Furthermore, the opening and closing transmission shaft passes through the end of the lower bracket and is rotatably connected thereto, and the opening and closing transmission shaft passes through the end of the upper bracket and is fixedly connected thereto.

[0015] Furthermore, the cross-sections of the lower barrel and the upper barrel are mirror-symmetrical structures, including three-screw grooves and heat exchange tubes. The heat exchange tubes are arranged around the outer periphery of the three-screw grooves, and the heat exchange tubes are arranged along the axial direction of the barrel structure.

[0016] Furthermore, the lower cylinder and the upper cylinder are arranged in sections in the axial direction, and connecting flanges are provided at both ends of each section unit, and two adjacent section units are connected via the connecting flanges.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the barrel structure of the split three-screw extruder of the utility model is split horizontally to form a lower barrel and an upper barrel, so that the upper barrel can be flipped open or closed relative to the lower barrel, thereby opening or closing the barrel structure as a whole, which greatly facilitates cleaning of the inside of the barrel during maintenance, or the screw core shaft can be directly and conveniently lifted out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a split three-screw extruder of the utility model;

[0019] Figure 2 This is a top view of a split three-screw extruder of the utility model;

[0020] Figure 3 It is a side view of a split three-screw extruder of the utility model;

[0021] Figure 4 It is a structural schematic diagram showing that the lower cylinder and the upper cylinder are connected by an opening and closing structure;

[0022] In the figure: 1. barrel structure; 2. lower barrel; 3. upper barrel; 4. opening and closing structure; 5. opening and closing articulated frame; 6. opening and closing transmission shaft; 7. lower bracket; 8. upper bracket; 9. support; 10. frame; 11. gear box; 12. main motor; 13. feed port; 14. metering feed part; 15. feed hopper; 16. feed screw; 17. feed motor; 18. opening and closing reducer; 19. coupling; 20. hand wheel; 21. three-screw groove; 22. heat exchange tube; 23. segment unit; 24. connecting flange. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] A split three-screw extruder, such as Figure 1 , 2 As shown, it includes a barrel structure 1 and a screw mandrel. The specific installation structure is that the barrel structure 1 is fixedly arranged on a frame 10 through a support 9, and one end of the barrel structure 1 is connected to a gear box 11, and the input end of the gear box 11 is provided with a main motor 12. The main motor 12 is connected to the gear box 11, and the gear box 11 controls a certain reduction ratio and then connects to the screw mandrel to drive the three screw mandrels to rotate, thereby realizing the extrusion processing of the material.

[0025] like Figure 3As shown, the barrel structure 1 includes a lower barrel 2 and an upper barrel 3. The upper barrel 3 is connected to one side of the lower barrel 2 through an opening and closing structure 4. The opening and closing structure 4 controls the upper barrel 3 to flip open relative to the lower barrel 2. The upper barrel 3 and the lower barrel 2 are as shown in FIG. Figure 3 When the upper barrel 3 is turned over and opened, the screw groove in the barrel structure 1 can be directly opened to form a relatively spacious and direct working surface, which is convenient for directly performing various operations on the inside of the barrel, including disassembly and installation of the screw mandrel, or cleaning the screw groove inside the barrel. It can be understood that when the upper barrel 3 and the lower barrel 2 are closed, a sealed internal screw groove can be formed. In actual use, a sealing gasket can be arranged between the joint surfaces of the lower barrel 2 and the upper barrel 3, and then the upper barrel 3 and the lower barrel 2 can be firmly locked by inserting a locking bolt (not shown in the figure) arranged longitudinally.

[0026] The opening and closing structure 4 includes an opening and closing hinge frame 5 and an opening and closing transmission shaft 6. The opening and closing hinge frame 5 includes a lower bracket 7 and an upper bracket 8. One end of the lower bracket 7 is fixedly connected to one side of the lower cylinder 2, and one end of the upper bracket 8 is fixedly connected to one side of the upper cylinder 3. The opening and closing transmission shaft 6 passes through the ends of the lower bracket 7 and the upper bracket 8 at the same time. Figure 4 As shown, the upper cylinder 3 and the lower cylinder 2 are connected by an upper bracket 8 and a lower bracket 7, so that the upper cylinder 3 can be flipped to one side to open. In actual use, a driving structure may not be provided. When opening, the upper cylinder 3 can be directly lifted by a crane, or manually flipped to open.

[0027] As another embodiment, the opening and closing transmission shaft 6 serves as a control shaft for opening and closing the upper cylinder 3. Specifically, the opening and closing transmission shaft 6 passes through the end of the lower bracket 7 and is rotatably connected thereto, and the opening and closing transmission shaft 6 passes through the end of the upper bracket 8 and is fixedly connected thereto; in actual use, the upper cylinder 3 can be opened by rotating the opening and closing transmission shaft 6 and transmitting power through the upper bracket 8; it is understandable that before opening the upper cylinder 3, the locking bolts fixing the lower cylinder 2 and the upper cylinder 3 should be loosened first.

[0028] Furthermore, the opening and closing structure 4 also includes an opening and closing reducer 18. The advantage of providing the opening and closing reducer 18 is that it can be designed as a structure for unidirectional torque transmission, that is, the power is only transmitted from the opening and closing reducer 18 to the opening and closing transmission shaft 6, and cannot be transmitted in the reverse direction, so that the opening of the upper cylinder 3 can be maintained at various opening angles, such as Figure 2 As shown, the opening and closing reducer 18 is fixedly arranged on the frame 10 , and the output end of the opening and closing reducer 18 is connected to one end of the opening and closing transmission shaft 6 through a coupling 19 .

[0029] As an embodiment, a hand wheel 20 is provided at the input end of the opening and closing reducer 18, and the opening and closing reducer 18 is driven to rotate by the hand wheel 20. As another embodiment, a control motor is provided at the input end of the opening and closing reducer 18, and the opening and closing reducer 18 is driven to rotate by the control motor. In actual use, the manual opening or electric opening mode can be customized according to customer needs.

[0030] like Figure 4 As shown, the cross-sections of the lower barrel 2 and the upper barrel 3 are mirror-symmetrical structures, including a three-screw groove 21 and a heat exchange tube 22. The heat exchange tube 22 is arranged around the outer periphery of the three-screw groove 21, and the heat exchange tube 22 is arranged along the axis direction of the barrel structure 1. The heat exchange tube 22 arranged in a surrounding shape can exchange heat for the material in the three-screw groove 21, so as to reach an appropriate processing temperature.

[0031] like Figure 1 As shown, the lower cylinder 2 and the upper cylinder 3 are arranged in sections in the length direction and in the axial direction, so that the barrel structure 1 of the device is divided into the upper cylinder 3 and the lower cylinder 2 in the transverse direction, and is easy to flip open, and is divided into a plurality of segment units 23 in the longitudinal direction, and each segment unit 23 is provided with connecting flanges 24 at both ends, and two adjacent segment units 23 are connected by the connecting flanges 24, so that the barrel structure 1 can be modularly assembled, thereby making the shape of the barrel structure 1 easier to process, and when the heat exchange tube 22 is blocked somewhere, the blocked part can be disassembled for cleaning or replacement with a strong purpose, making manufacturing and maintenance more convenient.

[0032] Furthermore, a feed port 13 is provided at one end of the barrel structure 1 close to the gear box 11, and a metering feed portion 14 is connected to the upper end of the feed port 13. Figure 1 As shown, the metering feeding part 14 includes a feeding hopper 15, a feeding screw 16, and a feeding motor 17. A feeding screw 16 is provided between the lower part of the feeding hopper 15 and the feeding port 13, and the feeding screw 16 is driven by the feeding motor 17. The feeding of this device is metering feeding. The feeding screw 16 is driven to rotate by the feeding motor 17 to squeeze the material in the feeding hopper 15 into the feeding port 13 according to the amount, which can effectively prevent material jamming and make the feeding flow more accurate.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A split three-screw extruder, comprising a barrel structure (1) and a screw core shaft, characterized in that: The barrel structure (1) comprises a lower barrel (2) and an upper barrel (3); the upper barrel (3) is connected to one side of the lower barrel (2) via an opening and closing structure (4); the opening and closing structure (4) controls the upper barrel (3) to flip open relative to the lower barrel (2); the opening and closing structure (4) comprises an opening and closing hinge frame (5) and an opening and closing transmission shaft (6); the opening and closing hinge frame (5) comprises a lower bracket (7) and an upper bracket (8); one end of the lower bracket (7) is fixedly connected to one side of the lower barrel (2); one end of the upper bracket (8) is fixedly connected to one side of the upper barrel (3); the opening and closing transmission shaft (6) passes through the ends of the lower bracket (7) and the upper bracket (8) at the same time; the opening and closing transmission shaft (6) serves as a control shaft for opening or closing the upper barrel (3).

2. A split three-screw extruder according to claim 1, characterized in that: The barrel structure (1) is fixedly arranged on a frame (10) via a support (9); one end of the barrel structure (1) is connected to a gear box (11); and a main motor (12) is arranged at the input end of the gear box (11).

3. A split three-screw extruder according to claim 2, characterized in that: A feed port (13) is provided at one end of the barrel structure (1) close to the gear box (11), and a metering feed portion (14) is connected to the upper end of the feed port (13).

4. A split three-screw extruder according to claim 3, characterized in that: The metering feeding section (14) comprises a feeding hopper (15), a feeding screw (16), and a feeding motor (17). A feeding screw (16) is provided between the lower part of the feeding hopper (15) and the feeding port (13), and the feeding screw (16) is driven by the feeding motor (17).

5. A split three-screw extruder according to claim 2, characterized in that: The opening and closing structure (4) also includes an opening and closing reducer (18), which is fixedly arranged on the frame (10), and the output end of the opening and closing reducer (18) is connected to one end of the opening and closing transmission shaft (6) through a coupling (19).

6. A split three-screw extruder according to claim 5, characterized in that: The input end of the opening and closing reducer (18) is provided with a hand wheel (20), and the opening and closing reducer (18) is driven to rotate by the hand wheel (20).

7. A split three-screw extruder according to claim 5, characterized in that: The input end of the opening and closing reducer (18) is provided with a control motor, and the opening and closing reducer (18) is driven by the control motor to rotate.

8. A split three-screw extruder according to claim 1, characterized in that: The opening and closing transmission shaft (6) passes through the end of the lower bracket (7) and is rotatably connected thereto, and the opening and closing transmission shaft (6) passes through the end of the upper bracket (8) and is fixedly connected thereto.

9. A split three-screw extruder according to claim 1, characterized in that: The cross-sections of the lower barrel (2) and the upper barrel (3) are mirror-symmetrical structures, and include a triple screw groove (21) and a heat exchange tube (22). The triple screw groove (21) is surrounded by a heat exchange tube (22), and the heat exchange tube (22) is arranged along the axis direction of the barrel structure (1).

10. A split three-screw extruder according to claim 9, characterized in that: The lower cylinder (2) and the upper cylinder (3) are arranged in sections in the axial direction, and connecting flanges (24) are provided at both ends of each section unit (23), and two adjacent section units (23) are connected via the connecting flanges (24).

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