Screen frame structure and screening equipment

Abstract

The utility model provides a kind of screen framework structure and screening equipment, comprising: annular support body, its inside is provided with hollow area;Screening unit, fixedly arranged in the hollow area of the annular support body;Flow guide structure, along the spiral downward extension of the outer periphery of the annular support body;Wherein, the upper profile of the flow guide structure and the outer edge of screening unit jointly define continuous material accumulation channel;When the annular support body is vibrated, the oversize in the middle part of screening unit is displaced to material accumulation channel radially outward under the action of vibration. Provide a kind of screen framework structure and screening equipment, can automatically clean the oversize remaining on screen.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment, specifically to a screen frame structure and screening equipment. Background Technology

[0002] When the pre-vibrating screen starts working, materials of inconsistent sizes fall onto the screen. Through the vibration angle set by the screen itself, the materials begin to make circular motion. Some large materials and foreign objects cannot pass through the screen surface and remain on the screen. As more and more material is left on the screen surface, the screening efficiency is affected, and the screen needs to be cleaned manually. Summary of the Invention

[0003] The problem this utility model aims to solve is to provide a screen frame structure and a screening device that can automatically clean the residual material on the screen.

[0004] The technical solution adopted by this utility model to solve the above problems is: a screen frame structure, comprising:

[0005] A ring-shaped support structure with a hollow interior;

[0006] The screening unit is fixedly installed within the hollow area of ​​the annular support.

[0007] The flow guiding structure extends spirally downward along the outer periphery of the annular support body;

[0008] The upper contour of the flow guiding structure and the outer edge of the screening unit together define a continuous material accumulation channel;

[0009] When the annular support is vibrated, the material on the screen in the middle of the screening unit is radially displaced outward to the accumulation channel under the action of vibration.

[0010] The screen frame structure vibrates in the horizontal plane through a ring-shaped support, causing the material on the screen in the middle of the screening unit to move radially outward under the action of the vibration. When the material on the screen moves to the outer edge of the screening unit, it enters a continuous accumulation channel defined by the upper contour of the guide structure and the outer edge of the screening unit. The design of the guide structure extending spirally along the outer periphery of the ring-shaped support guides the material on the screen that has entered the accumulation channel to move continuously towards the outlet in a spiral direction, ultimately achieving the effect of automatic discharge of the material on the surface of the screening unit. This structure, through the synergistic effect of centrifugal force and spiral guide channel, avoids the accumulation of material on the screen surface and in the accumulation channel. It can automatically clean the residual material on the screen without manual intervention, effectively improving screening efficiency and reducing maintenance costs.

[0011] Furthermore, the annular support is circular in shape, with radially outward protrusions on its outer wall forming a hooking flange. This annular design ensures uniform force distribution on the screening unit during periodic lateral tilting movements in the horizontal plane, generating a stable centrifugal force field. Under centrifugal force, the material on the screen moves uniformly along the circumference towards the outer edge of the screening unit, preventing irregularities in the support's shape that could disrupt the material's trajectory and affect the efficiency of transferring the material to the accumulation channel. The hooking flange provides a convenient installation and fixing method for the screen frame structure, allowing it to be easily hooked onto other equipment or supports, enhancing the installation flexibility and stability of the screen frame structure.

[0012] Furthermore, the flow guiding structure is a spiral ring-shaped component fixed to the outer wall of the annular support, with its end extending beyond the starting end in the spiral extension direction, so that the ring-shaped component encircles the annular support at least once circumferentially. The flow guiding structure is fixed to the outer wall of the annular support in a spiral shape pointing downwards. On the one hand, the downward spiral shape can fully utilize gravity to assist the material in moving downwards within the accumulation channel, working together with centrifugal force to accelerate the discharge speed of the material on the screen. At the same time, it can prevent any material on the screen from failing to fall into the accumulation channel.

[0013] Furthermore, the highest point of the guide structure is 0.5-2mm lower than the upper surface of the screening unit. This ensures that the material on the screen smoothly crosses the outer edge of the screening unit and enters the accumulation channel under the action of centrifugal force.

[0014] Furthermore, the screening unit is a woven wire mesh, a polymer screen cloth, or a composite sintered filter.

[0015] A material screening device includes: a housing, in which the aforementioned screen frame structure is installed;

[0016] The top of the housing is provided with a feed inlet positioned above the vertical projection area of ​​the screening unit; a vibrator is connected to the housing to drive the housing to vibrate.

[0017] The side wall of the housing has a discharge port, which is located at the end of the spiral of the material accumulation channel.

[0018] Furthermore, the housing includes an upper cover and a lower body; the abutment flange is positioned between the lower edge of the upper cover and the upper edge of the lower body. Attached Figure Description

[0019] Figure 1 This is a perspective view of the screen frame structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the screen frame structure of this utility model;

[0021] Figure 3 This is a cross-sectional view of the screening equipment of this utility model.

[0022] Diagram: 1. Annular support; 1.1. Hanging flange; 2. Screening unit; 3. Flow guiding structure; 4. Material accumulation channel; 5. Shell; 5.1. Upper shell cover; 5.1.1. Inlet; 5.1.2. Outlet; 5.2. Lower shell; 6. Vibrator. Detailed Implementation

[0023] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0024] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0025] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0027] Please see Figures 1 to 3A screen frame structure includes an annular support 1, a screening unit 2, and a flow guiding structure 3. The annular support 1 has a hollow internal region, forming a ring shape, with a radially outward protruding flange 1.1 on its outer wall. The screening unit 2 is fixedly disposed within the hollow region of the annular support 1 and can be selected from woven wire mesh, polymer screen cloth, or composite sintered filter sheet. The flow guiding structure 3 is a spiral ring-shaped component fixed to the outer wall of the annular support 1, extending spirally downwards along the outer circumference of the annular support 1. Its end extends beyond the starting end in the spiral extension direction, encircling the annular support 1 at least once circumferentially. The highest point of the flow guiding structure 3 is 0.5-2 mm lower than the upper surface of the screening unit 2. The upper contour of the flow guiding structure 3 and the outer edge of the screening unit 2 together define a continuous material accumulation channel 4. When the annular support 1 is vibrated, the material on the screen in the middle of the screening unit 2 is radially displaced outwards to the material accumulation channel 4 under the vibration.

[0028] A screening device includes a housing 5 and a vibrator 6. The housing 5 houses the aforementioned screen frame structure, which includes an upper cover 5.1 and a lower body 5.2. A mounting flange 1.1 of the screen frame structure is sandwiched between the lower edge of the upper cover 5.1 and the upper edge of the lower body 5.2. The top of the housing 5 has an inlet 5.1.1 positioned above the vertical projection area of ​​the screening unit 2, and an outlet 5.1.2 is opened on the side wall, its position corresponding to the spiral end of the accumulation channel 4. The vibrator 6 is installed at the bottom of the housing 5 and connected to it, used to drive the housing 5 to vibrate.

[0029] Mechanism of action:

[0030] The screening unit 2, located within the hollow area of ​​the annular support 1, generates high-frequency micro-amplitude vibrations under the action of vibration. When material enters the equipment from the feed inlet 5.1.1 at the top of the shell 5, it falls directly onto the upper surface of the screening unit 2. Material with a particle size smaller than the screen aperture size, aided by vibration, quickly passes through the screening unit 2, becoming undersize material, and is discharged from the bottom of the screening unit 2; while oversize material with a particle size larger than the screen aperture size cannot pass through the screen aperture and undergoes radial outward displacement in the middle of the screening unit 2 due to vibration.

[0031] The guide structure 3 is used to guide the discharge of the oversize material. The guide structure 3 extends spirally downward along the outer periphery of the annular support 1, and its highest point is 0.5-2mm lower than the upper surface of the screening unit 2. Together with the outer edge of the screening unit 2, it defines the continuous accumulation channel 4. Under the action of centrifugal force generated by vibration and gravity, the oversize material moves radially outward along the surface of the screening unit 2 and gradually converges into the accumulation channel 4. After entering the accumulation channel 4, the oversize material slides downward along the spiral trajectory of the guide structure 3 under the combined impetus of vibration and its own gravity. Finally, the oversize material is discharged from the equipment through the spiral end of the guide structure 3 from the discharge port 5.1.2 at the corresponding position on the side wall of the shell 5.

[0032] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A screen frame structure, characterized in that, include: A ring-shaped support (1) has a hollow area inside; The screening unit (2) is fixedly installed in the hollow area of ​​the annular support (1); The flow guiding structure (3) extends spirally downward along the outer periphery of the annular support (1); The upper contour of the flow guiding structure (3) and the outer edge of the screening unit (2) together define a continuous material accumulation channel (4); When the annular support (1) is vibrated, the material on the screen in the middle of the screening unit (2) is radially displaced outward to the material accumulation channel (4) under the action of vibration.

2. The structure according to claim 1, characterized in that: The annular support (1) is in the shape of a ring, and its outer wall protrudes radially outward to form a hanging flange (1.1).

3. The structure according to claim 1, characterized in that: The flow guiding structure (3) is a spiral ring-shaped component fixed to the outer wall of the annular support (1), with its end extending beyond the starting end in the spiral extension direction, so that the ring-shaped component surrounds the annular support (1) at least once in the circumferential direction.

4. The structure according to claim 3, characterized in that: The highest point of the flow guiding structure (3) is 0.5-2 mm lower than the upper surface of the screening unit (2).

5. The structure according to claim 1, characterized in that: The screening unit (2) is selected from any of the following: woven wire mesh, polymer screen cloth or composite sintered filter.

6. A screening device, characterized in that, include: The housing (5) has a screen frame structure as described in any one of claims 1-5 installed inside it; The vibrator (6) is connected to the housing (5) to drive the housing (5) to generate vibration; The top of the housing (5) is provided with a feed inlet (5.1.1) located above the vertical projection area of ​​the screening unit (2); The side wall of the shell (5) has a discharge port. 5.1.2), its position corresponds to the end of the spiral of the material accumulation channel (4).

7. The screening equipment according to claim 6, characterized in that: The housing (5) includes an upper cover (5.1) and a lower body (5.2); The abutment flange (1.1) is sandwiched between the lower edge of the upper shell cover (5.1) and the upper edge of the lower shell body (5.2).

Images