Linear vibrating screening device

Abstract

The utility model discloses a linear vibrating screening device relates to material screening equipment technical field, including screen frame, install on the screen frame screen board and vibration generating device, and the screen frame is three -sided frame structure, and its open end is used for discharging, is equipped with a plurality of parallel V type groove on the screen board, and along material moving direction includes the feeding uniform dispersion section and the step screening section who butt -joint in proper order, and the height difference is formed between two sections to constitute the step structure, and is provided with the screen hole at the joint place. The utility model discloses through step structure forces material to tumble, effectively breaks material accumulation, exposes hidden scrap, and combines the special layout of screen hole, can solve the screen hole blockage problem significantly, improves the screening efficiency and the purity of olive shape, ellipsoid material etc.

Description

Technical Field

[0001] This utility model relates to the field of material screening equipment technology, specifically to a linear vibrating screening device. Background Technology

[0002] In material processing, screening or grading is often required to remove impurities such as debris and shavings, or to separate materials of different particle sizes. Linear vibrating screens are common equipment for this purpose. They typically use a vibrating motor as the excitation source, utilizing the generated vibration force to drive the screen surface and the material in a linear trajectory. During this process, fine impurities that meet the screen aperture size requirements pass through the screen apertures and are removed, while qualified material is conveyed along the screen surface to the discharge end, thus completing the screening operation. Due to its simple structure, large processing capacity, and high screening efficiency, this type of equipment has been widely used in many fields such as mining and agricultural product processing.

[0003] However, existing linear vibrating screens still have significant limitations in practical applications. First, when processing olive-shaped or ellipsoidal materials, the shape of these materials is poorly compatible with round or elliptical screen openings. The materials easily become embedded in the screen openings during vibration and are difficult to detach through vibration, leading to screen blockage. Second, for impurities with sizes close to the screen opening diameter, they not only have difficulty passing through the screen but also easily wedge into the screen openings under vibration, causing blockage. This phenomenon is particularly prominent when the particle size distribution of the material impurities is wide.

[0004] The problem of screen hole clogging not only directly reduces the screening efficiency of linear vibrating screens, but also causes some impurities to enter subsequent processes along with qualified materials, affecting the quality of material processing. It also increases equipment maintenance costs, requiring staff to frequently stop the machine to clean the clogged screen holes, interrupting the continuous production process, reducing overall production efficiency, and adversely affecting industrial continuous production. Utility Model Content

[0005] This invention addresses the problems existing in the prior art by providing a linear vibrating screening device that fully exposes impurities by forcibly tumbling the material, thereby improving screening efficiency and purity, and reducing the frequency of screen clogging and equipment maintenance costs.

[0006] The technical solution adopted by this utility model is as follows: A linear vibrating screening device includes a screen frame, a screen plate installed on the screen frame, and a vibration generating device installed at the bottom of the screen plate. The screen frame is a three-sided frame structure, with its open end used for material output. The vibration generating device drives the screen plate to vibrate linearly. The screen plate has multiple parallel V-shaped grooves distributed on it, and the length direction of the V-shaped grooves is consistent with the material movement direction. The screen plate includes a feeding and dispersing section and a stepped screening section connected sequentially along the material movement direction. A height difference is formed between the feeding and dispersing section and the stepped screening section, thereby forming a stepped structure for the material to fall. A screen hole is provided at the junction of the discharge end of the feeding and dispersing section and the feed head of the stepped screening section, and the screen hole simultaneously penetrates the end of the feeding and dispersing section and the head of the stepped screening section.

[0007] Furthermore, there are multiple stepped screening sections, which are connected sequentially from high to low, and screen holes are provided at the junction of adjacent stepped screening sections.

[0008] Furthermore, it also includes a collection hopper, which is disposed below the sieve holes and is used to collect the undersize material that passes through the sieve holes.

[0009] Furthermore, the length of the feeding and dispersing section is greater than the length of the stepped screening section.

[0010] Furthermore, the feeding and dispersing section is equipped with a material leveling mechanism for controlling the thickness of the material layer.

[0011] Furthermore, the material leveling mechanism is configured to organize the material entering from upstream into a single layer before conveying it to the feeding and dispersing section.

[0012] Furthermore, the material leveling mechanism includes a connecting plate fixedly connected to the screen frame, and a scraping plate fixedly installed on the connecting plate.

[0013] Furthermore, the material leveling mechanism is V-shaped in the feeding direction, with the tip of the V-shape pointing in the feeding direction and the V-shaped opening facing the discharge direction, for diverting the incoming material to both sides of the screen plate in the width direction.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) By setting up multiple stepped screening sections and forming a continuous stepped structure, the material is dropped and screened multiple times, which strengthens the rolling and screening effect of the material, effectively destroys the stable retention state formed on the screen surface, powerfully loosens and removes impurities stuck in the screen holes, and significantly reduces the frequency of screen hole blockage. Each drop of the material produces impact, rolling and diffusion, which thoroughly shakes and exposes the impurities that may have been buried by the material, and gives them the opportunity to redistribute during the fall, so that they can be efficiently separated through the next screen hole.

[0016] (2) The screen holes are set at the junction of the stepped structure, so that they are naturally divided into two staggered upper and lower parts in the vertical direction. This makes it impossible for the screen holes to form a complete and stable contact surface with the outline of any single material, which greatly reduces the possibility of impurities or materials getting stuck in the screen holes due to geometric embedding, thereby effectively avoiding screen hole blockage and ensuring the continuous and stable screening capacity of the equipment.

[0017] (3) By setting up multiple stepped screening sections connected sequentially from high to low, a highly efficient multi-stage screening system is formed. The material undergoes multiple cycles of "conveyance-drop-screening", which improves screening efficiency and screening purity;

[0018] (4) By setting a screen plate with a V-groove and making the length direction of the V-groove consistent with the material movement direction, the material can be effectively guided to flow smoothly in the predetermined direction. At the same time, under the action of vibration, the V-groove is used to lift and transport the larger particles forward, while the smaller particles of impurities settle to the bottom of the groove due to gravity, so that the impurities are fully exposed and contact the screen holes in the lower layer, which greatly improves the probability of impurity removal.

[0019] (5) The feeding uniform distribution section is equipped with a V-shaped material distribution mechanism, which can quickly divide the incoming material and spread it into a uniform thin layer, avoiding the material accumulation that causes a decrease in screening efficiency, and providing a material flow with stable thickness and uniform flow for subsequent step screening, ensuring the overall screening effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a top view of the structure of this utility model.

[0022] In the diagram: 1. Screen frame; 2. Screen plate; 201. Feeding and dispersing section; 202. Stepped screening section; 203. Screen hole; 3. Vibration generator; 4. Material distribution mechanism; 4. Connecting plate; 401. Scraper plate; 402. Collection hopper; 5. Detailed Implementation

[0023] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0024] like Figure 1 , Figure 2 As shown in the figure, this embodiment provides a linear vibrating screening device, which mainly includes a screen frame 1, a screen plate 2 and a vibration generating device 3.

[0025] The screen frame 1 is a three-sided frame structure, with one side being an open end for outputting the screened material. The screen plate 2 is fixedly installed on the screen frame 1, and a vibration generator 3 is installed at its bottom. This vibration generator 3 can drive the screen frame 1 and the screen plate 2 to vibrate linearly together. The vibration generator 3 can be a vibration motor or other excitation equipment commonly used in the art.

[0026] The core improvement of this invention lies in the structure of the sieve plate 2. The sieve plate 2 has multiple parallel V-shaped grooves, and the length direction of the V-shaped grooves is consistent with the material's movement direction, used to gather and guide the material.

[0027] The screen plate 2 is divided into a feeding and dispersing section 201 and at least one stepped screening section 202 along the material movement direction. In this embodiment, three stepped screening sections 202 are provided. The feeding and dispersing section 201 is connected to the first stepped screening section 202, and a height difference is formed at the connection point. Each stepped screening section 202 is also connected sequentially from high to low, thus forming a multi-step structure on the material conveying path. The material will fall and roll when passing through each step. Screen holes 203 are provided at the junction of each step. The screen holes 203 pass through both the end of the feeding and dispersing section 201 and the beginning and end of the stepped screening section 202, that is, they span across the stepped structure.

[0028] To further collect the screened impurities, the device also includes a collection hopper 5. The collection hopper 5 is located below all the sieve holes 203 and is used to receive and collect the undersize material (i.e., debris and small particulate impurities) that passes through the sieve holes 203.

[0029] In this embodiment, the length of the feeding and dispersing section 201 is greater than the length of the single-stage stepped screening section 202 to ensure that the material is sufficiently dispersed before entering the screening area.

[0030] Furthermore, a material leveling mechanism 4 is provided in the feeding and dispersing section 201 to control the material layer thickness. The material leveling mechanism 4 is configured to organize the material conveyed from upstream into a single layer before uniformly feeding it into the feeding and dispersing section 201.

[0031] In this embodiment, the material leveling mechanism 4 includes a connecting plate 401 fixedly connected to the screen frame 1, and a scraper plate 402 fixedly installed on the connecting plate 401. A controllable gap is formed between the lower edge of the scraper plate 402 and the bottom of the V-shaped groove, and the height of the gap is set to allow a single layer of material to pass through.

[0032] Furthermore, the material leveling mechanism 4 is generally V-shaped in the feeding direction. The tip of the V-shape points towards the feeding direction, while the opening of the V-shape faces the discharge direction. This design can automatically divert the incoming material to both sides of the screen plate 2 in the width direction, thereby avoiding material accumulation in the middle of the screen plate and ensuring that the material is evenly distributed in all V-shaped grooves, thus making full use of the entire screen width and improving processing capacity and screening uniformity.

[0033] With the aid of the teachings present in the foregoing description and related drawings, those skilled in the art will conceive of many modifications and other embodiments of the present invention. Therefore, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are considered to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a general and descriptive sense only and are not intended to be limiting.

Claims

1. A linear vibrating screening device, comprising a screen frame (1), a screen plate (2) mounted on the screen frame (1), and a vibration generator (3) mounted on the bottom of the screen plate (2), wherein the screen frame (1) is a three-sided frame structure, the open end of which is used for material output, and the vibration generator (3) drives the screen plate (2) to perform linear vibration, characterized in that: The sieve plate (2) has multiple parallel V-shaped grooves, the length direction of which is consistent with the material movement direction. The sieve plate (2) includes a feeding and dispersing section (201) and a stepped screening section (202) connected in sequence along the material movement direction. A height difference is formed between the feeding and dispersing section (201) and the stepped screening section (202), thus forming a stepped structure that allows the material to fall. A sieve hole (203) is provided at the junction of the discharge end of the feeding and dispersing section (201) and the feed head of the stepped screening section (202), and the sieve hole (203) penetrates both the end of the feeding and dispersing section (201) and the head of the stepped screening section (202).

2. The linear vibrating screening device as described in claim 1, characterized in that: The number of stepped screening sections (202) is multiple, and the multiple stepped screening sections (202) are connected sequentially from high to low, and screen holes (203) are provided at the junction of two adjacent stepped screening sections (202).

3. A linear vibrating screening device as described in claim 1 or 2, characterized in that: It also includes a collection hopper (5), which is disposed below the sieve hole (203) and is used to collect the undersize material that passes through the sieve hole (203).

4. The linear vibrating screening device as described in claim 1, characterized in that: The length of the feeding uniform distribution section (201) is greater than the length of the stepped screening section (202).

5. A linear vibrating screen as described in claim 4, characterized in that: The feeding and dispersing section (201) is equipped with a material leveling mechanism (4) for controlling the thickness of the material layer.

6. The linear vibrating screening device as described in claim 5, characterized in that: The material leveling mechanism (4) is configured to organize the material entering from the upstream into a single layer of material before conveying it to the feeding and dispersing section (201).

7. A linear vibrating screen as described in claim 5 or 6, characterized in that: The material leveling mechanism (4) includes a connecting plate (401) fixedly connected to the screen frame (1), and a scraping plate (402) fixedly installed on the connecting plate (401).

8. The linear vibrating screen as described in claim 7, characterized in that: The material distribution mechanism (4) is V-shaped in the feeding direction, with the tip of the V-shape pointing in the feeding direction and the V-shaped opening facing the discharge direction, for diverting the incoming material to both sides of the screen plate (2) in the width direction.

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