A multi-stage combined screening mechanism

Abstract

The utility model discloses a multistage combined screening mechanism, including the box, the box bottom is fixed with first exciter, the box inside even installation has a plurality of sieve plate, the box end portion is located sieve plate discharge end all is connected with the flow guide, and the adjacent flow guide between is provided with the round sieve frame, and a plurality of round sieve frames are in line and are arranged, the flow guide one end bottom is provided with the discharge gate, the round sieve frame top is provided with the feed port, and the discharge gate and feed port are connected through the hose, and the round sieve frame inside center is fixed with the screen cloth, and the round sieve frame bottom end is connected with the flow guide pipe, and the flow guide pipe bottom end pipe orifice of round sieve frame top and the feed port of bottom round sieve frame corresponding flow guide are connected through the hose, and the round sieve frame outside is installed with the support structure, and the round sieve frame one side is connected with the discharge pipe, and the round sieve frame one side is connected with the discharge pipe, and through the combination of primary screening and secondary fine screening, the screening quality is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of screening technology, specifically relating to a multi-stage combined screening mechanism. Background Technology

[0002] In the field of material screening, efficient and precise screening equipment has always been the industry's goal. Traditional multi-stage flat screens, as commonly used screening equipment, have significant shortcomings in practical applications. Due to their relatively simple screen surface structure, the material slides too fast on the screen surface. This causes many materials, especially critical particles whose size is close to the screen openings, to pass through the screen plate quickly without sufficient screening time, resulting in a large amount of material being missed and seriously affecting the quality and efficiency of screening.

[0003] Furthermore, straight screens exhibit insufficient screening accuracy when dealing with certain special materials. Materials like wet, sticky mineral powders tend to agglomerate, which traditional equipment struggles to break up effectively. A circular vibrating screen is needed to disperse the material, exposing and screening the fine particles trapped within the agglomerates, thus improving screening accuracy. However, this method presents significant space utilization challenges. The side-by-side arrangement of the two screening devices occupies a relatively large area. In terms of screening efficiency, both straight and circular vibrating screens must be used simultaneously to achieve both high-speed coarse screening and fine separation. The need for material transfer between screens further reduces overall processing efficiency, hindering continuous production and failing to meet the demands of large-scale production. To address these problems with traditional screening equipment, this invention proposes a multi-stage combined screening mechanism that not only effectively prevents material leakage and improves screening accuracy and efficiency but also offers significant advantages in space utilization. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage combined screening mechanism, comprising a housing, a first vibrator fixed at the bottom of the housing, multiple screen plates uniformly installed inside the housing, guides connected to the discharge ends of the screen plates at the ends of the housing, circular screen frames arranged between adjacent guides, multiple circular screen frames arranged collinearly, a discharge port at the bottom of one end of each guide, a feed port at the top of each circular screen frame, the discharge port and the feed port being connected by a flexible hose, a screen mesh fixed at the center inside each circular screen frame, a guide pipe connected to the bottom end of each circular screen frame, the guide pipe at the bottom end of the guide pipe of the top circular screen frame and the guide corresponding to the feed port of the bottom circular screen frame being connected by a flexible hose, a support structure installed on the outside of each circular screen frame, and a discharge pipe connected to one side of each circular screen frame.

[0005] In a preferred embodiment of this utility model, the box body, the circular screen frame, and the fixing frame do not contact each other, and the circular screen frame, the flow guide, and the screen plate correspond one-to-one.

[0006] As a preferred embodiment of the present invention, a base is provided at the bottom of the box, and a number of legs are fixed on the top end face of the base. A first support spring is fixed between the legs and the box.

[0007] As a preferred technical solution of this utility model, the support structure includes a fixed frame and a base. The circular screen frame is fixed inside the fixed frame. A second vibrator is fixed at the center of the bottom of the fixed frame. A second support spring is evenly fixed between the fixed frame and the base. The base is fixed to the surface of the base platform.

[0008] As a preferred embodiment of this utility model, a box cover is installed on the top of the box body, and a feed hopper is welded to one end of the box cover.

[0009] As a preferred technical solution of this utility model, the screen is fixed to the center of the circular screen frame using a detachable connection method.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] (1) This utility model significantly improves screening quality by combining primary screening with secondary fine screening. The primary screening by the flat screen plate can quickly separate most of the materials with a particle size significantly smaller than the screen hole. The secondary screening by the screen in the circular screen frame can accurately screen the critical particles that remain after the primary screening. In particular, it can effectively reduce the screening rate for particles close to the screen hole size and meet the requirements for high-precision screening of materials.

[0012] (2) The screen plate inside the housing of this utility model performs high-speed coarse screening under the drive of the first vibrator, quickly and initially classifying a large amount of material. The circular screen frame, driven by the second vibrator at the bottom of the supporting structure, focuses on fine sorting. The combination of the two makes the material processing efficiency significantly higher than that of traditional single screening equipment. Compared with the use of dual equipment, it can adapt to the rhythm of large-scale, high-intensity continuous production operations and improve processing efficiency. Moreover, in terms of space utilization, the multi-level combination and compact structural design effectively reduces the floor space while achieving the same screening function. It improves the space utilization rate in production scenarios that require compact equipment layout. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the box body and the circular screen frame in this utility model;

[0016] In the diagram: 1. Box body; 2. Screen plate; 3. Flow guide; 4. First vibrator; 5. Circular screen frame; 6. Discharge port; 7. Feed port; 8. Screen mesh; 9. Flow guide pipe; 10. Fixing frame; 11. Feed hopper; 12. Discharge pipe; 13. Base; 14. Support leg; 15. First support spring; 16. Second vibrator; 17. Base; 18. Second support spring; 19. Box cover. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example

[0019] Please see Figure 1-2 The present invention provides the following technical solution: a multi-stage combined screening mechanism, including a box 1, a first vibrator 4 fixed at the bottom of the box 1, multiple screen plates 2 evenly installed inside the box 1, a guide 3 connected to the discharge end of the screen plate 2 at the end of the box 1, a circular screen frame 5 arranged between adjacent guide 3, multiple circular screen frames 5 arranged collinearly, a discharge port 6 opened at the bottom of one end of the guide 3, a feed port 7 opened at the top of the circular screen frame 5, the discharge port 6 and the feed port 7 are connected by a hose, a screen 8 fixed at the center inside the circular screen frame 5, a guide pipe 9 connected to the bottom end of the circular screen frame 5, the bottom end of the guide pipe 9 of the top circular screen frame 5 and the corresponding guide 3 at the feed port 7 of the bottom circular screen frame 5 are connected by a hose, a support structure is installed on the outside of the circular screen frame 5, and a discharge pipe 12 is connected to one side of the circular screen frame 5.

[0020] In order to avoid vibration interference between components and ensure that the circular screen frame 5, the flow guide 3 and the screen plate 2 can independently and efficiently perform their respective screening and flow guiding functions, thereby improving the overall screening accuracy and stability, in this embodiment, as a preferred technical solution of the present invention, the box 1 and the circular screen frame 5 and the fixing frame 10 do not contact each other, and the circular screen frame 5, the flow guide 3 and the screen plate 2 correspond one-to-one.

[0021] In order to enhance the stability of the equipment, effectively buffer the violent vibration of the housing 1 caused by the operation of the first vibrator 4, reduce the impact on the installation foundation during the operation of the equipment, and reduce the transmission of vibration to the surrounding environment, in this embodiment, as a preferred technical solution of the present invention, a base 13 is provided at the bottom of the housing 1, and a number of legs 14 are fixed on the top end face of the base 13. A first support spring 15 is fixed between the legs 14 and the housing 1.

[0022] In order to provide a stable excitation force for the circular screen frame 5, the second support spring 18 buffers the reaction force generated when the second vibrator 16 is working, ensuring that the circular screen frame 5 can perform screening operations at a suitable frequency and amplitude, thereby improving screening efficiency and quality. In this embodiment, as a preferred technical solution of the present invention, the support structure includes a fixed frame 10 and a base 17. The circular screen frame 5 is fixed inside the fixed frame 10, and the second vibrator 16 is fixed at the center of the bottom of the fixed frame 10. The second support spring 18 is evenly fixed between the fixed frame 10 and the base 17, and the base 17 is fixed to the surface of the base platform 13.

[0023] In order to facilitate the input of materials, prevent the materials from spilling during the feeding process, and at the same time play a certain role in dust prevention and protection of the inside of the box 1, maintain the cleanliness of the screening environment, and ensure the normal operation of the screening operation, in this embodiment, as a preferred technical solution of the present utility model, a box cover 19 is installed on the top of the box 1, and a feed hopper 11 is welded to one end of the box cover 19.

[0024] In order to facilitate quick and convenient replacement and cleaning when the screen 8 is worn or clogged, reduce equipment maintenance costs, shorten downtime maintenance time, and continuously ensure the efficient and accurate screening performance of the screening mechanism, in this embodiment, as a preferred technical solution of the present invention, the screen 8 is fixed to the center of the circular screen frame 5 by a detachable connection.

[0025] In summary, with the aid of the above-described technical solution of this utility model, the material enters the interior of the housing 1 through the feed hopper 11. The first vibrator 4, fixed at the bottom of the housing 1, begins to operate. The first vibrator 4 is a biaxial vibrator that generates high-frequency vibration. This vibration is transmitted through the housing 1 to multiple screen plates 2 evenly installed inside. The screen plates 2 vibrate under the action of the first vibrator 4, performing the initial screening operation on the material entering the housing 1. The material is excited by vibration on the screen plates 2, and under the combined force of gravity and vibration, it undergoes a throwing motion along the surface of the screen plates 2. Smaller particles fall through the screen holes of the screen plates 2, achieving preliminary screening.

[0026] The material remaining on the screen after the initial screening, i.e., the larger particle size, moves along the screen plate 2 towards the discharge end. Upon reaching the discharge end, the material is guided by the guide 3 and enters the feed inlet 7 of the circular screen frame 5 through the discharge port 6 and a flexible hose. The fixed frames 10 welded to both sides of the circular screen frame 5 have support structures installed at their bottom ends. The second vibrator 16 is a single-axis vibrator. The motor inside the single-axis vibrator drives the eccentric block to rotate at high speed through a transmission structure, thereby generating a strong centrifugal inertial force. The generated vibration force is transmitted to the circular screen frame 5 through the fixed frames 10. The screen 8, fixed at the center inside the circular screen frame 5, causes the material inside the circular screen frame 5 to exhibit a parabolic trajectory on the screen surface under the action of vibration. This helps to fully disperse the material and initiate the screening operation, performing secondary fine screening of the incoming material. Because the screen 8 is fixed at the center inside the circular screen frame 5 using a detachable connection method, it is easy to replace it in time when wear or blockage occurs, thus maintaining screening accuracy. During the vibration of the material on the screen 8, particles that meet the aperture requirements of the screen 8 are further screened out, and the large-diameter particles on the screen are discharged from the discharge pipe 12 connected to one side of the circular screen frame 5.

[0027] The bottom end of the guide pipe 9 of the top circular screen frame 5 is connected to the corresponding guide 3 at the feed inlet 7 of the bottom circular screen frame 5 via a flexible hose. Small-diameter undersize material passing through the screen 8 of the top circular screen frame 5 enters the bottom circular screen frame 5 through this connection structure for further screening, thereby improving the screening accuracy of the material and completing the entire multi-stage combined screening process. Meanwhile, a base 13 is provided at the bottom of the housing 1. The support legs 14 fixed to the top end face of the base 13 are connected to the housing 1 via a first support spring 15. This structure effectively buffers the vibration generated by the first vibrator 4 during operation, ensuring the stability of the equipment operation and reducing the vibration impact on the surrounding environment.

[0028] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage combined screening mechanism, comprising a housing (1), wherein a first vibrator (4) is fixed at the bottom of the housing (1), characterized in that: The box (1) is uniformly equipped with multiple screen plates (2). The end of the box (1) is connected to the discharge end of the screen plate (2) and a guide (3). A circular screen frame (5) is set between adjacent guides (3). Multiple circular screen frames (5) are arranged in a collinear manner. A discharge port (6) is opened at the bottom of one end of the guide (3). A feed port (7) is opened at the top of the circular screen frame (5). The discharge port (6) and the feed port (7) are connected by a hose. A screen mesh (8) is fixed at the center of the circular screen frame (5). A guide pipe (9) is connected to the bottom end of the circular screen frame (5). The guide (3) at the bottom end of the guide pipe (9) of the top circular screen frame (5) and the guide (3) at the feed port (7) of the bottom circular screen frame (5) are connected by a hose. A support structure is installed on the outside of the circular screen frame (5). A discharge pipe (12) is connected to one side of the circular screen frame (5).

2. The multi-stage combined screening mechanism according to claim 1, characterized in that: The box (1), the circular screen frame (5), and the fixing frame (10) do not contact each other, and the circular screen frame (5), the guide (3), and the screen plate (2) correspond one-to-one.

3. The multi-stage combined screening mechanism according to claim 2, characterized in that: The bottom of the box (1) is provided with a base (13), and a number of legs (14) are fixed on the top end face of the base (13). A first support spring (15) is fixed between the legs (14) and the box (1).

4. The multi-stage combined screening mechanism according to claim 3, characterized in that: The support structure includes a fixed frame (10) and a base (17). The circular screen frame (5) is fixed inside the fixed frame (10). A second vibrator (16) is fixed at the center of the bottom of the fixed frame (10). A second support spring (18) is evenly fixed between the fixed frame (10) and the base (17). The base (17) is fixed to the surface of the base (13).

5. The multi-stage combined screening mechanism according to claim 1, characterized in that: The top of the box body (1) is fitted with a box cover (19), and a feed hopper (11) is welded to one end of the box cover (19).

6. The multi-stage combined screening mechanism according to claim 1, characterized in that: The screen (8) is fixed to the center of the circular screen frame (5) using a detachable connection method.

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