Stacked dry desliming screen

Abstract

This invention discloses a stacked dry desliming screen, comprising an adjustable feeding device, a flexible feeding device, a housing, vibration isolation springs, a rebound plate, a vibrator, a driven frame, a belt discharge device, and a flexible screen plate. The adjustable feeding device is connected to the housing via the flexible feeding device; the housing is mounted on the ground or other foundation via vibration isolation springs; the vibrator is installed on the upper part of the housing to excite the housing to vibrate. The flexible screen plate is connected to the driven frame and the housing at both ends to form a screen surface. The screen has at least two screen surfaces, with a rebound plate installed above each screen surface and a belt discharge device installed below each screen surface, forming a compact stacked screen structure, improving the screening capacity of sticky and wet materials and solving the problem of low screening capacity for thin material layers. The surface of the rebound plate is made of a flexible material structure that can be disturbed to prevent sticky and wet materials from sticking together. The belt discharge device under the screen prevents sticky and wet fine materials from sticking together after passing through the screen, eliminating the need for manual cleaning.

Description

Technical Field

[0001] This invention relates to the field of screening machinery technology, specifically to a stacked dry desliming screen. Background Technology

[0002] Currently, most screening of extremely viscous and fine materials involves wet screening. However, wet screening has a series of problems:

[0003] (1) Water consumption: Wet screening requires a large amount of water to process materials, especially during the washing and separation process, which consumes a large amount of fresh water resources.

[0004] (2) Environmental pollution: Wastewater generated by wet screening may contain suspended solids or chemicals, which require special treatment to prevent environmental pollution.

[0005] (3) Operational complexity: Dehydration and water recycling require additional equipment and technical support.

[0006] (4) Impact on material quality: Wet screening may affect the quality of materials, especially for easily soluble or water-sensitive materials, causing mineral mudification and affecting downstream mineral processing.

[0007] In summary, wet screening faces problems such as energy consumption, water consumption, and environmental pollution. Dry screening can effectively avoid these problems, and even reducing the amount of feed material used in wet screening through dry screening can have significant economic benefits. However, currently, dry screening is difficult to achieve the same results as wet screening, for two main reasons:

[0008] (1) The existing screening method of vibrating screen makes it difficult to make the inertial force of sticky and wet fine materials greater than their adhesion force, thus making it impossible to effectively desorb and deagglomerate.

[0009] (2) When the material layer is thick in dry screening, the sticky and wet fine materials will re-adhere to the lower particles after desorption. There is a strong contradiction between the screening effect and the throughput of dry screening. Summary of the Invention

[0010] The purpose of this invention is to provide a multi-layered dry desliming screen. Through high-vibration screening with a thin layer of feed, the material on the screen surface exhibits a highly chaotic motion. A rebound plate is installed to cause high-speed collisions between the material and the screen, further improving the deagglomeration effect. The thin layer feed avoids secondary adhesion. The multi-layered screen surface increases the equipment's throughput. This solves the problems existing in current dry screening technologies.

[0011] To achieve the above objectives, the present invention provides the following solution:

[0012] This invention provides a stacked dry desliming screen, comprising an adjustable material distribution device, a vibrator, a rebound plate, a belt discharge device, a flexible connection feeding device, a housing, a driven frame, and a flexible screen plate. The vibrator, the rebound plate, and the belt discharge device are fixedly installed between the housing to form a stacked screen box. Vibration isolation springs are installed between the housing and the ground.

[0013] Preferably, the box body includes a feed chute, two side plates, a beam frame structure, an under-screen chute, an outer support frame, and a discharge chute; the feed chute, two side plates, beam frame structure, under-screen chute, and discharge chute are fixed on the outer support frame.

[0014] The beam frame structure and the driven frame are connected by the shear spring. The flexural screen plate is installed on the beam frame structure of the box body and between the driven frame crossbeam to form the screen surface.

[0015] Preferably, the stacked dry desliming screen includes one or at least two screen surfaces.

[0016] Preferably, the rebound plate includes a rebound plate frame and a rebound plate disturbance flexible plate, wherein the rebound plate disturbance flexible plate is a flexible material that can be disturbed.

[0017] The adjustable material distribution device includes an adjustable material distribution device inlet, an adjustable material distribution device reducer, an adjustable material distribution device motor, an adjustable material distribution device chain plate mechanism, an adjustable material distribution device housing, and an adjustable material distribution device outlet. Preferably, the adjustable material distribution device has at least two adjustable material distribution device outlets, the number of adjustable material distribution device outlets corresponds to the number of screen layers, and the size of the inlet is adjustable, thereby changing the material distribution of each screen layer.

[0018] The adjustable material distribution device conveys sticky and wet materials through an adjustable material distribution device chain plate mechanism, and discharges materials through a vertical adjustable material distribution device outlet, which can realize efficient conveying and feeding of sticky and wet materials.

[0019] Preferably, the adjustable dispensing device is connected to the box body via a flexible feeding device.

[0020] The present invention achieves the following beneficial technical effects compared to the prior art:

[0021] 1. The stacked dry desliming screen provided by the present invention has a composite impact method of high elastic screen surface and rebound plate for thin material layer screening, which can realize the desorption and deagglomeration of sticky and wet fine materials and avoid re-agglomeration.

[0022] 2. The stacked dry desliming screen provided by the present invention has a compact stacked multi-layer screen structure, which realizes multi-layer screening in a limited space, improves the screening capacity of sticky and wet materials, and solves the problem of low screening capacity of thin material layers.

[0023] 3. The adjustable material distribution device conveys sticky and wet materials through the adjustable material distribution device chain plate mechanism, and discharges materials through the vertical adjustable material distribution device outlet, which can realize efficient conveying and feeding of sticky and wet materials.

[0024] 4. The stacked dry desliming screen provided by this invention features a flexible, agitated material surface on the rebound plate to prevent sticky, wet fine materials from adhering and accumulating over time. Similarly, a belt conveyor discharge device is used in the small-angle area under the screen to transport materials and scrape them off at the end of the belt, preventing sticky, wet fine materials from sticking together after passing through the screen. This ensures the smooth operation of the screening process for sticky, wet fine materials. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional view of the overall structure of the present invention;

[0027] Figure 2 This is a side view of the overall structure of the present invention;

[0028] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0029] Figure 4 This is a perspective view of the adjustable material dispensing device of the present invention;

[0030] Figure 5 This is a schematic diagram of the feed inlet of the adjustable material dispensing device of the present invention;

[0031] Figure 6 This is a three-dimensional sectional view of the sieve box of the present invention;

[0032] Figure 7 This is a side sectional view of the sieve box of the present invention;

[0033] Figure 8 This is a perspective view of the housing of the present invention;

[0034] Figure 9 This is a perspective view of the driven frame of the present invention;

[0035] Figure 10 This is a perspective view of the flexible sieve plate of the present invention;

[0036] Figure 11 This is a side view of the rebound plate of the present invention;

[0037] In the diagram: 1-Adjustable material distribution device; 2-Flexible connection feeding device; 3-Box body; 4-Vibration isolation spring; 5-Rebound plate; 6-Vibrator; 7-Driven frame; 8-Belt discharge device; 9-Flexible screen plate; 10-Inlet of adjustable material distribution device; 11-Reducer of adjustable material distribution device; 12-Motor of adjustable material distribution device; 13-Chain plate mechanism of adjustable material distribution device; 14-Housing shell of adjustable material distribution device; 15-Outlet of adjustable material distribution device; 16-Shear spring; 17-Rebound plate frame; 18-Flexible plate disturbance plate of rebound plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] The purpose of this invention is to provide a stacked dry desliming screen to solve the problems existing in the prior art.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] This embodiment provides a stacked dry desliming screen, such as... Figure 1 , Figure 2 , Figure 3 As shown, the system includes an adjustable material distribution device 1, a flexible feeding device 2, a housing 3, vibration isolation springs 4, rebound plates 5, a vibrator 6, driven frames 7, a belt discharge device 8, and a flexible screen plate 9. The adjustable material distribution device 1 is connected to the housing 3 via the flexible feeding device 2; the housing 3 is placed on the ground or other foundation via the vibration isolation springs 4; the rebound plates 5 are installed inside the housing; the vibrator is installed on the upper part of the housing 3 to excite the housing to vibrate; and the belt discharge device 8 is installed inside the housing. N driven frames 7 are connected to the housing 3, forming N layers of screen surfaces. Each layer of screen surface has one rebound plate 5 installed above it, and each layer of screen surface has one belt discharge device 8 installed below it.

[0042] like Figure 4The image shows a perspective view of the adjustable material distribution device 1, which includes an adjustable material distribution device inlet 10, an adjustable material distribution device reducer 11, an adjustable material distribution device motor 12, an adjustable material distribution device chain plate mechanism 13, an adjustable material distribution device housing 14, and an adjustable material distribution device outlet 15. The adjustable material distribution device motor 12 drives the adjustable material distribution device chain plate mechanism 13 to operate via the adjustable material distribution device reducer 11. The chain plate mechanism can push the material inside the adjustable material distribution device housing 14 to move and discharge it from the adjustable material distribution device outlet 15.

[0043] like Figure 5 The diagram shows the discharge ports of the adjustable material distribution device 1. It has five discharge ports: #1, #2, #3, #4, and #5. These five ports are arranged in a stepped manner in the material travel direction to achieve material distribution. The opening size of each discharge port can be adjusted via a sliding cover plate, thereby controlling the discharge volume of each port. The width of the final discharge port is consistent with the width of the adjustable material distribution device housing 14, ensuring complete material discharge.

[0044] like Figure 6 , Figure 7 As shown, the driven frame 7 is connected to the housing 3 via at least eight shear springs 16, wherein the housing 3 is shaped as follows: Figure 8 As shown, the driven box 7 is as follows Figure 9 As shown. At least two flexible screen plates 9 are installed between the housing 3 and the driven frame 7, forming a screen surface. The flexible screen plate 9 is shaped as follows: Figure 10 As shown.

[0045] like Figure 11 The image shows a side view of the rebound plate 5, which includes two parts: a rebound plate frame 17 and a rebound plate disturbance flexible plate 18. At least two rebound plate disturbance flexible plates 18 are fixedly installed on the rebound plate frame 17 at both ends, so that the rebound plate disturbance flexible plates 18 have a certain deflection in the middle.

[0046] In this embodiment, the adjustable material distribution device 1 of the stacked dry desliming screen can divide the sticky and wet material into five parts and feed them into the five screen surfaces of the stacked dry desliming screen. Each screen surface is composed of a driven frame 7, a box 3 and eight flexible screen plates 9 connected together. A rebound plate 5 is installed above each screen surface and a belt discharge device 8 is installed below each screen surface.

[0047] The installation method of the stacked dry desliming screen provided by this invention is as follows:

[0048] Adjustable material distribution device 1 is fixedly installed on the ground. Adjustable material distribution device 1 is connected to housing 3 via flexible feeding device 2. The interface of flexible feeding device 2 is sealed to prevent overflow when there is excessive moisture in the sticky material. Housing 3 is placed on the ground via vibration isolation springs 4. Driven frame 7 is connected to housing 3 via shear spring 16 and flexible screen plate 9, forming a screen surface. Rebound plate 5 is fixedly installed above the screen surface via rebound plate frame 17, ensuring that one rebound plate 5 is installed above each layer of screen surface. A belt conveyor discharge device 8 is fixedly installed below each layer of screen surface. Vibrator 6 is fixedly installed above housing 3.

[0049] The working principle of the stacked dry desliming screen provided by this invention is as follows:

[0050] The mechanical vibration principle, kinematic principle, and screening principle of sticky and wet materials of the stacked dry desliming screen are as follows: the vibrator 6 excites the housing 3 to vibrate, and the vibration isolation spring 4 can weaken the vibration transmitted from the housing 3 to the ground. The flexible connection feeding device 2 can prevent the vibration of the housing 3 from being transmitted to the adjustable distributing device 1. After the housing 3 vibrates, the driven frame 7 vibrates through the shear spring 16. The amplitude of the driven frame 7 is inconsistent with the amplitude of the housing 3, resulting in an amplitude difference. Under the action of this amplitude difference, the two flexible screen plates 9 connected to the driven frame 7 and the housing 3 respectively undergo violent flexing motion. The flexing screen plate 9, which undergoes violent flexing motion, has a vibration intensity of more than 20G, which can make the sticky and wet materials be thrown up at high speed and collide with the rebound plate 5 above the screen surface, which can effectively deagglomerate the sticky and wet materials, thereby improving its screening efficiency. When the rebound plate 5 collides with the material, the flexible plate 18 on the rebound plate 5 will be disturbed and deformed, preventing the deagglomerated fine sticky and wet materials from re-adheding. The deagglomerated fine, sticky material falls through the flexible screen plate 9 onto the belt discharge device 8, where it is transported by the belt and scraped out at the end of the belt discharge device. Coarse material is discharged at the end of the screen surface.

[0051] The inventors discovered that to achieve high-speed throwing of sticky, wet materials, thin-layer screening is necessary to induce chaotic material motion. Therefore, single-layer screening has limited capacity. This invention addresses this by designing an adjustable material distribution device and multi-layer screen configurations to achieve multi-layer screening, thereby increasing the screening capacity. Furthermore, the adjustable material distribution device 1 allows for controlled feeding of sticky, wet materials. During normal operation, the adjustable material distribution device 1 evenly distributes material to each screen layer. If a screen layer malfunctions, the discharge port 15 on the adjustable material distribution device 1 can be adjusted to stop feeding material to that screen layer, while the remaining screen layers are redistributed for even feeding.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A stacked dry desliming screen, characterized in that: The device includes an adjustable material distribution device, a flexible feeding device, a housing, vibration isolation springs, a rebound plate, a vibrator, a driven frame, a belt discharge device, a flexible screen plate, and shear springs. The housing is connected to the adjustable material distribution device via the flexible feeding device; the driven frame is connected to the housing via the shear springs; the two ends of the flexible screen plate are respectively installed on the driven frame and the housing to form a screen surface; the rebound plate is installed above the screen surface; the belt discharge device is installed below the screen surface; the vibrator is installed above the housing; at least four vibration isolation springs are installed on the outside of the housing and connected to the ground. The adjustable material distribution device includes an adjustable material distribution device inlet, an adjustable material distribution device reducer, an adjustable material distribution device motor, an adjustable material distribution device chain plate mechanism, an adjustable material distribution device housing, and an adjustable material distribution device outlet. The adjustable material distribution device motor drives the adjustable material distribution device chain plate mechanism to operate through the adjustable material distribution device reducer; the adjustable material distribution device chain plate mechanism is used to push the material inside the adjustable material distribution device housing to move; the material is discharged from the adjustable material distribution device outlet. The rebound plate includes a rebound plate frame and a rebound plate disturbance flexible plate. At least two of the rebound plate disturbance flexible plates are fixedly installed on the rebound plate frame at both ends, so that the rebound plate disturbance flexible plates have deflection in the middle.

2. The stacked dry desliming screen according to claim 1, characterized in that: The driven frame is connected to the housing via the shear spring; the two ends of the flexible screen plate are respectively installed on the driven frame and the housing to form a screen surface; at least two driven frames are provided to form at least two layers of screen surface.

3. The stacked dry desliming screen according to claim 2, characterized in that: Each layer of the screen surface is provided with at least eight shear springs and at least six flexural screen plates.

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