A filtration device for a screw extruder

Abstract

This utility model relates to the field of screw extruder technology, specifically disclosing a filtration device for a screw extruder, including a filtration assembly threadedly connected to the screw extruder body. The filtration assembly includes: a central cylinder, a filter plate fixedly connected inside the central cylinder, and connecting cylinders elastically connected to the upper and lower ends of the central cylinder via telescopic sleeves. Two arc-shaped limiting rings are fixedly connected to the sides of the two connecting cylinders. A sliding groove is formed on the surface of the connecting cylinder, and two symmetrically arranged fixing rings are sleeved on the surface of the connecting cylinder. Threaded tubes are rotatably connected to the surface of the fixing rings, and the arc-shaped limiting rings are slidably connected to the inner walls of the fixing rings. This utility model allows the two connecting cylinders to move by moving the two threaded tubes, thereby enabling the connecting cylinders to make close contact with the discharge pipe and the feed pipe. Through the connection of the two threaded tubes with the discharge pipe and the feed pipe, the filter plate inside the filtration assembly can filter the passing material. Disassembly can be completed by rotating the two threaded tubes, facilitating the replacement of the filter plate.

Description

Technical Field

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

[0002] Screw extruders are divided into two types: cold-feed screw extruders and hot-feed screw extruders. Both are used to extrude rubber semi-finished products and finished products. Cold-feed screw extruders can feed in rubber compounds that have not been heat-refined. Through the action of screw extrusion, shearing and agitation, the rubber compound is heated and plasticized, and then continuously extruded from the die.

[0003] In the prior art, impurities and particles are mixed in during the screw extrusion process, so it is necessary to filter the impurities and particles in the extruded material. In order to filter the material entering the screw extruder, a filter plate is usually added to the feed port to filter the material entering the screw extruder.

[0004] However, most screw extruders currently use a filter plate that is fixedly connected to the feed inlet for filtration. In actual use, the filter plate is easily clogged by impurities after a long period of use, so it needs to be removed frequently for cleaning and replacement. Filter plates that are fixedly connected by screws are not easy to remove. Utility Model Content

[0005] The purpose of this invention is to provide a filtration device for a screw extruder to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a filtering device for a screw extruder, comprising a filtering assembly threadedly connected to the screw extruder body;

[0007] The filter assembly includes: a central cylinder, a filter plate fixedly connected inside the central cylinder, and connecting cylinders elastically connected to the upper and lower ends of the central cylinder through telescopic sleeves. Two arc-shaped limiting rings are fixedly connected to the sides of the two connecting cylinders. A sliding groove is opened on the surface of the connecting cylinder. Two symmetrically arranged fixing rings are sleeved on the surface of the connecting cylinder. A threaded tube is rotatably connected to the surface of the fixing rings. The arc-shaped limiting rings are slidably connected to the inner wall of the fixing rings.

[0008] Preferably, the screw extruder body is fixedly connected to an extrusion tube and a feed cylinder, an outlet tube is fixedly connected to the surface of the extrusion tube, an outlet tube is fixedly connected to the lower end of the feed cylinder, and a square protrusion is fixedly connected to the other end of both the feed tube and the outlet tube.

[0009] Preferably, the inner wall of the central cylinder is fixedly connected to the outer arc surface of the filter plate, and a telescopic sleeve is fixedly connected to the upper and lower ends of the central cylinder, with the other end of the telescopic sleeve fixedly connected to the connecting cylinder.

[0010] Preferably, both connecting cylinders have grooves on their surfaces, the inner walls of the grooves are in close contact with the protrusions, two arc-shaped limiting rings are fixedly connected to the surface of the connecting cylinder, a skeleton sealing ring is fixedly connected to the end of the connecting cylinder away from the telescopic sleeve, one connecting cylinder is in close contact with the upper end of the discharge pipe, and the other connecting cylinder is in close contact with the lower end of the inlet pipe.

[0011] Preferably, the inlet pipe and the outlet pipe are in close contact with the two skeleton sealing rings respectively.

[0012] Preferably, both of the fixed rings have an L-shaped cross-section. One end of the fixed ring is slidably connected to the threaded tube via a T-shaped slider. One threaded tube is threadedly connected to the surface of the feed tube, and the other threaded tube is threadedly connected to the surface of the discharge tube. The arc-shaped limiting ring is in contact with the inner wall of the fixed ring.

[0013] Preferably, the diameters of the central cylinder and the connecting cylinder are equal, and both ends of the arc-shaped limiting ring and the skeleton sealing ring are in contact with the sliding groove.

[0014] This invention allows two connecting cylinders to move by moving two threaded tubes, thus enabling the connecting cylinders to make tight contact with the discharge pipe and the inlet pipe, thereby maintaining a seal at the connection. The filter assembly can be fixed by connecting the two threaded tubes with the discharge pipe and the inlet pipe. At this time, the filter plate inside the filter assembly can filter the passing material. Disassembly can be completed by rotating the two threaded tubes. The whole assembly is easy to disassemble and assemble, and it is convenient to replace the filter plate. 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 schematic diagram of the filter assembly structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the filter assembly of this utility model;

[0018] Figure 4 This is a schematic diagram showing the central cylinder of this utility model located on one side of the discharge pipe.

[0019] In the diagram: 1. Screw extruder body; 2. Feed barrel; 3. Extrusion tube; 4. Center cylinder; 5. Filter plate; 6. Telescopic sleeve; 7. Connecting cylinder; 8. Slide groove; 9. Skeleton sealing ring; 10. Fixing ring; 11. Threaded tube; 12. Arc-shaped limiting ring; 13. Feed pipe; 14. Discharge pipe; 15. Protrusion. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Please see Figures 1-4 This utility model provides a technical solution: a filtering device for a screw extruder, including a filtering assembly threadedly connected to the screw extruder body 1. The screw extruder body 1 is fixedly connected to an extrusion tube 3 and a feed cylinder 2. The feed cylinder 2 facilitates the addition of material to the extrusion tube 3. The extrusion tube 3, through cooperation with other internal components of the screw extruder body 1, allows the material to be extruded. A discharge pipe 14 is fixedly connected to the surface of the extrusion tube 3. The lower end of the feed cylinder 2 is fixedly connected to the discharge pipe 14. When material is added to the feed cylinder 2, the material passes through the feed pipe 13, the filtering assembly, and the discharge pipe 14 and enters the extrusion tube 3. The other ends of the feed pipe 13 and the discharge pipe 14 are both fixedly connected to square protrusions 15, which facilitate sealing connections.

[0022] The filter assembly includes a central cylinder 4, the inner wall of which is fixedly connected to the outer arc surface of a filter plate 5. The filter plate 5 filters the incoming material. A telescopic sleeve 6 is fixedly connected to each of the upper and lower ends of the central cylinder 4. The telescopic sleeve 6 is made of a non-rigid material and has a certain degree of telescopic capacity due to its corrugated outer shell shape. The other end of the telescopic sleeve 6 is fixedly connected to a connecting cylinder 7. When the two connecting cylinders 7 move, the telescopic sleeve 6 can drive the central cylinder 4 to move. A groove 8 is provided on the surface of each of the two connecting cylinders 7. The inner wall of the groove 8 is in close contact with a protrusion 15. During installation, aligning the protrusion 15 with the groove 8 fixes the connection between the two. Simultaneously, the inner wall of the groove 8 can be designed with a tight seal. The sealing material ensures a seal between the material and the protrusion 15. Two arc-shaped limiting rings 12 are fixedly connected to the surface of the connecting cylinder 7. The arc-shaped limiting rings 12 help to move the connecting cylinder 7. A skeleton sealing ring 9 is fixedly connected to the end of the connecting cylinder 7 away from the telescopic sleeve 6. The skeleton sealing ring 9 enhances the sealing effect at the connection. One connecting cylinder 7 is in close contact with the upper end of the discharge pipe 14, and the other connecting cylinder 7 is in close contact with the lower end of the inlet pipe 13. At this time, the material can enter through the inlet pipe 13, be filtered by the filter plate 5, and be discharged from the discharge pipe 14. The inlet pipe 13 and the discharge pipe 14 are in close contact with the two skeleton sealing rings 9 respectively, so as to prevent material leakage at the connection.

[0023] Both fixed rings 10 have L-shaped cross-sections. Their protruding parts allow for movement. One end of each fixed ring 10 is slidably connected to a threaded tube 11 via a T-shaped slider. When the threaded tube 11 rotates, the fixed ring 10 remains in its position. The surface of the threaded tube 11 is rough to increase friction, facilitating manual rotation. One threaded tube 11 is threadedly connected to the surface of the inlet pipe 13, and the other threaded tube 11 is threadedly connected to the surface of the outlet pipe 14. Once the two threaded tubes 11 are securely threaded to their respective positions, the filter assembly can be fixed to the inlet pipe 13 and the outlet pipe 14. Between 4, the arc-shaped limiting ring 12 contacts the inner wall of the fixed ring 10. During the movement of the threaded tube 11, the fixed ring 10 moves accordingly, and the arc-shaped limiting ring 12 moves through the protruding part of the fixed ring 10. At this time, the connecting cylinder 7 moves accordingly, so that the two connecting cylinders 7 are in close contact with the feed pipe 13 and the discharge pipe 14, thereby improving the sealing effect. The diameters of the central cylinder 4 and the connecting cylinder 7 are equal. Both ends of the arc-shaped limiting ring 12 and the skeleton sealing ring 9 are in contact with the sliding groove 8, so that the fixed ring 10 and the threaded tube 11 can slide on the surface of the central cylinder 4, thereby exposing the sliding groove 8 for disassembly.

[0024] Slide the slide 8 into the protrusion 15, then move one threaded tube 11. At this time, the fixing ring 10 contacts the arc-shaped limiting ring 12 and drives it to move. The position of the filter assembly can be roughly fixed by the threaded connection of one threaded tube 11 to the discharge pipe 13 or the inlet pipe 14. Then install another threaded tube 11 to fix the position of the filter assembly. At this time, the connection between the discharge pipe 14 and one connecting cylinder 7 and the connection between the inlet pipe 13 and another connecting cylinder 7 are sealed to avoid leakage. When the filter plate 5 needs to be removed for cleaning, remove the two threaded tubes 11 in sequence to complete the disassembly and cleaning. The staff can replace a new filter assembly at the same time.

[0025] In actual use, the movement of the two threaded pipes 11 can drive the movement of the two connecting cylinders 7, so that the connecting cylinders 7 can be in close contact with the discharge pipe 14 and the inlet pipe 13, thereby maintaining the seal at the connection. The filter assembly can be fixed by connecting the two threaded pipes 11 with the discharge pipe 14 and the inlet pipe 13. At this time, the filter plate 5 in the filter assembly can filter the passing material. Disassembly can be completed by rotating the two threaded pipes 11, and the whole assembly is easy to disassemble and assemble.

[0026] 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 filter device for a screw extruder, characterized by: Includes a filter assembly that is threadedly connected to the screw extruder body (1); The filter assembly includes: a central cylinder (4), a filter plate (5) fixedly connected inside the central cylinder (4), and connecting cylinders (7) elastically connected to the upper and lower ends of the central cylinder (4) through telescopic sleeves (6). Two arc-shaped limiting rings (12) are fixedly connected to the sides of the two connecting cylinders (7). A sliding groove (8) is opened on the surface of the connecting cylinder (7). Two symmetrically arranged fixing rings (10) are sleeved on the surface of the connecting cylinder (7). A threaded tube (11) is rotatably connected to the surface of the fixing rings (10). The arc-shaped limiting rings (12) are slidably connected to the inner wall of the fixing rings (10).

2. A filter device for a screw extruder according to claim 1, characterized in that: The screw extruder body (1) is fixedly connected with an extrusion tube (3) and a feed cylinder (2). The surface of the extrusion tube (3) is fixedly connected with a discharge tube (14). The lower end of the feed cylinder (2) is fixedly connected with a discharge tube (14). The other ends of the feed tube (13) and the discharge tube (14) are both fixedly connected with square protrusions (15).

3. A filter device for a screw extruder according to claim 1, characterized in that: The inner wall of the central cylinder (4) is fixedly connected to the outer arc surface of the filter plate (5), and a telescopic sleeve (6) is fixedly connected to the upper and lower ends of the central cylinder (4), and the other end of the telescopic sleeve (6) is fixedly connected to the connecting cylinder (7).

4. A filter device for a screw extruder according to claim 1, characterized in that: Both connecting cylinders (7) have grooves (8) on their surfaces. The inner wall of the groove (8) is in close contact with the protrusion (15). Two arc-shaped limiting rings (12) are fixedly connected to the surface of the connecting cylinder (7). A skeleton sealing ring (9) is fixedly connected to the end of the connecting cylinder (7) away from the telescopic sleeve (6). One connecting cylinder (7) is in close contact with the upper end of the discharge pipe (14), and the other connecting cylinder (7) is in close contact with the lower end of the inlet pipe (13).

5. A filter device for a screw extruder according to claim 2, characterized in that: The feed pipe (13) and the discharge pipe (14) are in close contact with the two skeleton sealing rings (9).

6. A filter device for a screw extruder according to claim 1, characterized in that: Both of the fixed rings (10) have L-shaped cross sections. One end of the fixed ring (10) is slidably connected to the threaded tube (11) through a T-shaped slider. One threaded tube (11) is threadedly connected to the surface of the feed tube (13), and the other threaded tube (11) is threadedly connected to the surface of the discharge tube (14). The arc-shaped limiting ring (12) is in contact with the inner wall of the fixed ring (10).

7. A filter device for a screw extruder according to claim 1, characterized in that: The diameters of the central cylinder (4) and the connecting cylinder (7) are equal, and both ends of the arc-shaped limiting ring (12) and the skeleton sealing ring (9) are in contact with the sliding groove (8).

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