Rotary screen structure

Abstract

The utility model discloses a drum screen structure which comprises a drum screen internally provided with a hollow channel and provided with filtering holes in the surface, an anti-blocking barrel is arranged at the position, corresponding to all or part of the filtering holes, of the drum screen, the bottom end and the top end of the anti-blocking barrel are open, and the bottom end of the anti-blocking barrel is fixed or integrally arranged on the outer surface of the drum screen. An opening in the bottom end of the anti-blocking barrel is communicated with the filtering hole; and the height of the anti-blocking barrel extending out of the outer surface of the drum screen is greater than the length of the material rod connecting part. The anti-blocking drum screen is reasonable in structural design, the anti-blocking drums are arranged at the positions corresponding to the filtering holes, so that the connecting parts of the material rods cannot block the filtering holes in the screening process, and the screening efficiency of the drum screen is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screening equipment, and more specifically, to a drum screen structure. Background Art

[0002] The trommel screen is a widely used machine in sorting technology, controlling the separation of materials by particle size. As the screen drum rotates, the material entering the trommel screen flips and rolls. Qualified material is discharged through the outlet at the bottom of the sieve drum, while unqualified material is discharged through the outlet at the rear of the drum. Trommel screens are widely used in various fields due to their simple structure, easy maintenance, stable operation, and high screening efficiency.

[0003] The prior art also uses a drum screen for screening injection molded products. Usually, the product molded by the injection mold includes a material rod a with a connecting portion a1 and a product b connected to the connecting portion a1. Figure 1 and Figure 2 . The material rod a and product b are separated by a roller screen, and product b will pass through the filter holes on the surface of the drum screen. Product b is cylindrical, wherein the aperture of the filter holes is set to be larger than the diameter of product b to allow product b to pass through the filter holes smoothly, while the material rod a will fall through the hollow channel of the drum screen into a material receiving device, such as a drop chute. However, in the actual screening process, the connection part a1 of the material rod a may enter the filter hole and hook on the surface of the drum screen. Even if the material rod a rotates to the upper position with the drum screen, since the connection part a1 passes through the filter hole and hooks on the surface of the drum screen, the material rod a is not likely to fall into the hollow channel of the drum screen due to its own weight, thereby causing blockage of the filter hole and affecting the efficiency of screening of injection molded products. Summary of the Invention

[0004] The utility model overcomes the deficiencies of the prior art and provides a drum screen structure with a reasonable structural design. By arranging an anti-blocking cylinder at a position corresponding to the filter hole, the connecting part of the material rod will not block the filter hole during the screening process, thereby greatly improving the screening efficiency of the drum screen.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A drum screen structure includes a drum screen having a hollow channel inside and filter holes arranged on the surface. Anti-blocking cylinders are provided at positions corresponding to all or part of the filter holes on the drum screen. The bottom and top ends of the anti-blocking cylinders are both opened. The bottom end of the anti-blocking cylinder is fixed or integrally provided on the outer surface of the drum screen. The bottom end opening of the anti-blocking cylinder is connected to the filter holes. The height of the anti-blocking cylinder extending from the outer surface of the drum screen is greater than the length of the material rod connecting part.

[0007] Preferably, the anti-blocking cylinder is configured to be cylindrical.

[0008] Preferably, the opening diameters of the bottom and top ends of the anti-blocking cylinder are both adapted to the aperture of the filter hole.

[0009] Preferably, the anti-blocking cylinder is configured to be conical.

[0010] Preferably, the opening diameter of the bottom end of the anti-blocking cylinder is adapted to the aperture of the filter hole, and the opening diameter of the top end of the anti-blocking cylinder is larger than the opening diameter of the bottom end.

[0011] Preferably, the anti-blocking cylinder is welded to the position of the drum screen corresponding to the filter hole.

[0012] Preferably, the aperture of the filter hole, the opening diameter of the bottom end of the anti-blocking cylinder, and the opening diameter of the top end of the anti-blocking cylinder are all larger than the diameter of the product.

[0013] Beneficial effects of the utility model:

[0014] The utility model has a reasonable structural design. By arranging the anti-blocking cylinder at the position corresponding to the filter hole, the connecting part of the material rod will not block the filter hole during the screening process, thereby greatly improving the screening efficiency of the drum screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the material rod reflecting the existing technology;

[0016] Figure 2 A structural diagram of the product reflecting the existing technology;

[0017] Figure 3 It is a schematic diagram of the partial structure of a specific embodiment of the utility model;

[0018] Figure 4 It is a structural schematic diagram of a specific embodiment of the utility model.

[0019] In the figure: a, material rod; a1, connecting part; b, product; 1, drum screen; 2, anti-blocking cylinder; 21, bottom end; 22, top end. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1-4As shown, a drum screen structure includes a drum screen 1 with a hollow channel inside and filter holes arranged on the surface. An anti-blocking cylinder 2 is provided at positions corresponding to all or part of the filter holes on the drum screen 1. The bottom end 21 and the top end 22 of the anti-blocking cylinder 2 are both opened. The bottom end 21 of the anti-blocking cylinder 2 is fixed or integrally provided on the outer surface of the drum screen 1. The bottom end 21 opening of the anti-blocking cylinder 2 is connected to the filter holes. The height of the anti-blocking cylinder 2 extending from the outer surface of the drum screen 1 is greater than the length of the connecting portion a1 of the material rod a. It is set to a cylindrical shape; the opening diameters of the bottom end 21 and the top end 22 of the anti-blocking cylinder 2 are both adapted to the aperture of the filter hole; the anti-blocking cylinder 2 is set to a conical cylinder shape; the opening diameter of the bottom end 21 of the anti-blocking cylinder 2 is adapted to the aperture of the filter hole, and the opening diameter of the top end 22 of the anti-blocking cylinder 2 is larger than the opening diameter of the bottom end 21; the anti-blocking cylinder 2 is welded to the position of the corresponding filter hole of the drum screen 1; the aperture of the filter hole, the opening diameter of the bottom end 21 of the anti-blocking cylinder 2 and the opening diameter of the top end 22 of the anti-blocking cylinder 2 are all larger than the diameter of the product b.

[0022] By adopting the above technical solution, in the present invention, the drum screen 1 can be a shaftless drum screen 1 or a shafted drum screen 1. When performing the screening operation, the drum screen 1 is preferably tilted, and the material rod a connected to the product b will be conveyed to the higher end of the drum screen 1 in a tilted state via a conveyor belt. As the drum screen 1 rotates, the product b and the material rod a will be separated, wherein the product b will be separated from the outer surface of the drum screen 1 through the filter hole and the anti-blocking cylinder 2, while the material rod a will be moved out of the lower end of the drum screen 1 in a tilted state through the hollow channel. Among them, by providing the anti-blocking cylinder 2, the anti-blocking cylinder 2 can be cylindrical or conical, as long as the opening diameter of the bottom end 21 of the anti-blocking cylinder 2 and the opening diameter of the top end 22 of the anti-blocking cylinder 2 are both larger than the diameter of the product b, and the height of the anti-blocking cylinder 2 extending from the outer surface of the drum screen 1 is greater than the length of the connecting portion a1 of the material rod a. In this way, it is ensured that the product b can be smoothly separated from the outer surface of the drum screen 1, and the connecting portion a1 of the material rod a will not be hooked on the top end 22 of the anti-blocking cylinder 2. Even if the connecting portion a1 falls into the anti-blocking cylinder 2, as the drum screen 1 rotates, the connecting portion a1 will fall down at the upper position due to its own weight and will not block the filter holes. In this way, the screening efficiency is greatly improved.

[0023] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drum screen structure, comprising a drum screen (1) having a hollow channel inside and filter holes arranged on the surface, characterized in that: An anti-blocking cylinder (2) is provided at positions corresponding to all or part of the filter holes on the drum screen (1); the bottom end (21) and the top end (22) of the anti-blocking cylinder (2) are both opened; the bottom end (21) of the anti-blocking cylinder (2) is fixed or integrally provided on the outer surface of the drum screen (1); the opening of the bottom end (21) of the anti-blocking cylinder (2) is communicated with the filter holes.

2. A drum screen structure according to claim 1, characterized in that: The height of the anti-blocking cylinder (2) extending from the outer surface of the drum screen (1) is greater than the length of the connecting portion (a1) of the material rod (a).

3. A drum screen structure according to claim 2, characterized in that: The anti-blocking cylinder (2) is configured in a cylindrical shape.

4. A drum screen structure according to claim 3, characterized in that: The opening diameters of the bottom end (21) and the top end (22) of the anti-blocking cylinder (2) are both adapted to the aperture of the filter hole.

5. A drum screen structure according to claim 2, characterized in that: The anti-blocking cylinder (2) is configured in a conical cylinder shape.

6. A drum screen structure according to claim 5, characterized in that: The opening diameter of the bottom end (21) of the anti-blocking cylinder (2) is adapted to the aperture of the filter hole, and the opening diameter of the top end (22) of the anti-blocking cylinder (2) is larger than the opening diameter of the bottom end (21).

7. A drum screen structure according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: The anti-blocking cylinder (2) is welded to the position of the drum screen (1) corresponding to the filter hole.

8. A drum screen structure according to claim 7, characterized in that: The aperture of the filter hole, the opening diameter of the bottom end (21) of the anti-blocking cylinder (2), and the opening diameter of the top end (22) of the anti-blocking cylinder (2) are all larger than the diameter of the product (b).

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