Feeding structure of screen changer of extruder

Abstract

The utility model provides a feeding structure of a screen exchanger of an extruder. The feeding structure effectively solves the problem that the density of downstream materials is changed when a feeding channel of an existing screen exchanger of the extruder is switched. According to the technical scheme, the device comprises a main body fixed to a feeding port of the screen exchanger, two material flow channels are formed in the feeding port, a spherical cavity is formed in the main body, a sphere is arranged in the spherical cavity, a worm and gear structure is arranged at the rear end of the main body, and a center shaft of a worm gear penetrates through the side wall of the main body and is fixed to the sphere. The end of the worm is rotationally connected to the rear end face of the body. Two transition holes in one-to-one correspondence with the logistics channels are formed in the left end face of the main body, and a feeding port is formed in the front end face of the main body; the ball body is provided with a first blind hole coaxial with the feeding port and two second blind holes in one-to-one correspondence with the transition holes, the first blind hole is communicated with the second blind holes, and when one second blind hole is aligned with the corresponding transition hole, the other second blind hole is blocked by the side wall of the spherical cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder screen changers, in particular to a feeding structure of an extruder screen changer. Background Art

[0002] The double-column filter cartridge filter used in the existing extrusion production has a dual channel, and the two columns filter at the same time, with a large filtration area. When the filter screen is replaced, the material flow channel is half closed, and the downstream material pressure fluctuates greatly, which causes the material density to change, which is not conducive to product production. Patent document CN205674458U discloses a four-column four-channel filter cartridge filter for an extruder, which reduces the pressure fluctuation of the downstream material by setting up multiple independent logistics channels. In actual production, although this method reduces the downstream density fluctuation to a certain extent, the fluctuation still exists. The reason is essentially that when the logistics channel is switched by the cylinder 6 as the power, the effective flow area of ​​the column 2 changes.

[0003] In order to overcome the above problems, a feeding structure of an extruder screen changer is provided. During the process of switching the passage, the effective flow area remains constant, so that the density of the downstream material remains constant, thereby effectively improving the product quality. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a feeding structure of an extruder screen changer, which effectively solves the problem that the density of downstream materials will change when the feed channel of the prior extruder screen changer is switched.

[0005] The technical solution is to include a main body fixed at the feed port of the screen changer, with two logistics channels on the feed port, a spherical cavity arranged in the main body, a sphere arranged in the spherical cavity, a worm gear structure arranged at the rear end of the main body, wherein the central axis of the worm gear passes through the side wall of the main body and is fixed to the sphere, and the end of the worm gear is rotatably connected to the rear end surface of the main body;

[0006] Two transition holes corresponding to the logistics channels are arranged on the left end surface of the main body, and an inlet is arranged on the front end surface of the main body; a first blind hole coaxial with the inlet is arranged on the sphere, and two second blind holes corresponding to the transition holes are arranged on the sphere, the first blind hole is connected with the second blind hole, and when one of the second blind holes is aligned with its corresponding transition hole, the other second blind hole is blocked by the side wall of the spherical cavity.

[0007] Furthermore, when one of the second blind holes is aligned with its corresponding transition hole, the other second blind hole is blocked by the side wall of the spherical cavity, and the edge of the second blind hole is tangent to the edge of the corresponding transition hole.

[0008] Furthermore, the worm is connected to a servo motor.

[0009] The utility model has an ingenious structure, and in the process of switching the passages, the effective flow area is kept constant, so that the density of the downstream material is kept constant, thereby effectively improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a front sectional view of the utility model.

[0011] Figure 2 for Figure 1 Middle AA section view. DETAILED DESCRIPTION

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0013] Depend on Figure 1 to Figure 2 The utility model comprises a main body 1 fixed at the feed port of the screen changer, the feed port has two logistics channels 2, a spherical cavity is arranged in the main body 1, a sphere 3 is arranged in the spherical cavity, a worm gear 4 and a worm 5 structure are arranged at the rear end of the main body 1, wherein the central axis of the worm gear 4 passes through the side wall of the main body 1 and is fixed to the sphere 3, and the end of the worm 5 is rotatably connected to the rear end surface of the main body 1;

[0014] Two transition holes 6 corresponding to the logistics channel 2 are arranged on the left end face of the main body 1, and an inlet port 7 is arranged on the front end face of the main body 1; a first blind hole 8 coaxial with the inlet port 7 is arranged on the sphere 3, and two second blind holes 9 corresponding to the transition holes 6 are arranged on the sphere 3, and the first blind hole 8 is connected with the second blind hole 9. When one of the second blind holes 9 is aligned with the corresponding transition hole 6, the other second blind hole 9 is blocked by the side wall of the spherical cavity.

[0015] In order to ensure that the effective flow area of ​​the entire feeding structure remains constant, when one of the second blind holes 9 is aligned with its corresponding transition hole 6, the other second blind hole 9 is blocked by the side wall of the spherical cavity, and the edge of the second blind hole 9 is tangent to the edge of its corresponding transition hole 6.

[0016] In order to enable the worm wheel 4 to drive the worm 5 to rotate, a servo motor 10 is connected to the worm 5 .

[0017] It is worth noting that the ball 3 and the spherical cavity are tightly matched, and a sealing ring is installed between the outer edge of the end of the transition hole 6 and the ball 3.

[0018] When using, Figure 1As shown, the material enters the first blind hole 8 from the material inlet 7 at the front end of the main body 1, and then enters the corresponding transition hole 6 through the second blind hole 9 on the upper side, and finally enters the logistics channel 2 on the upper side; when the screen changer needs to switch channels for screen changing, the servo motor 10 is started, and the servo motor 10 drives the worm gear 4 to rotate through the worm 5, and the worm gear 4 drives the ball 3 to rotate. The ball 3 rotates, and the second blind hole 9 on the upper side and the corresponding transition hole 6 begin to be misaligned, and the misalignment becomes larger and larger, and the second blind hole 9 on the lower side gradually approaches the corresponding logistics channel 2 on the lower side. In this process, the sum of the effective flow areas of the two second blind holes 9 remains constant, so that the density of the downstream material is constant, and the problem of density fluctuation is completely solved.

[0019] The utility model has an ingenious structure, and in the process of switching the passages, the effective flow area is kept constant, so that the density of the downstream material is kept constant, thereby effectively improving the product quality.

Claims

1. A feeding structure for an extruder screen changer, characterized in that: It comprises a main body (1) fixed at the feed inlet of the screen changer, the feed inlet has two logistics channels (2), a spherical cavity is arranged in the main body (1), a sphere (3) is arranged in the spherical cavity, a worm gear (4) and a worm (5) structure is arranged at the rear end of the main body (1), wherein the central axis of the worm gear (4) passes through the side wall of the main body (1) and is fixed to the sphere (3), and the end of the worm gear (5) is rotatably connected to the rear end surface of the main body (1); Two transition holes (6) corresponding to the logistics channels (2) are arranged on the left end surface of the main body (1), and a material inlet (7) is arranged on the front end surface of the main body (1); a first blind hole (8) coaxial with the material inlet (7) is arranged on the sphere (3), and two second blind holes (9) corresponding to the transition holes (6) are arranged on the sphere (3); the first blind hole (8) is communicated with the second blind hole (9), and when one of the second blind holes (9) is aligned with its corresponding transition hole (6), the other second blind hole (9) is blocked by the side wall of the spherical cavity.

2. The extruder screen changer feeding structure according to claim 1, characterized in that: When one of the second blind holes (9) is aligned with its corresponding transition hole (6), the other second blind hole (9) is blocked by the side wall of the spherical cavity, and the edge of the second blind hole (9) is tangent to the edge of the corresponding transition hole (6).

3. The feeding structure of an extruder screen changer according to claim 1, characterized in that: The worm (5) is connected to a servo motor (10).

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