Negative dip angle large-angle linear sieve

Abstract

The utility model discloses a negative dip angle large-angle linear screen, belongs to the field of vibration screening machinery, and solves the problems of efficient screening and grading of ore pulp and coal slime and simplification of dewatering system equipment. Comprising a vibrator, a screen box, a screen surface, a vibration reduction supporting device and a driving device, the screen box is connected with the vibration reduction supporting device, and the vibrator is installed on the screen box and connected with the driving device. The screen surface is composed of three sections of screen surfaces, a horizontal section of screen surface is located near the feeding end of the screen box, a negative inclination section of screen surface is located from the middle section of the screen box to the discharging end of the screen box, and an arc-shaped transition section of screen surface is located at the joint of the horizontal section of screen surface and the negative inclination section of screen surface; the included angle alpha between the screen surface of the negative dip angle section and the horizontal plane is 15-20 degrees; and the arc radius R of the screen surface of the arc-shaped transition section is equal to 50-300mm. The vibrating screen has the advantages of being compact in structure, convenient to install, good in performance and high in screening efficiency, and is suitable for efficient grading of ore pulp materials in industrial and mining enterprises and dewatering of coal slime in coal cleaning plants.

Description

Technical Field

[0001] This utility model belongs to the field of vibrating screening machinery, and mainly relates to a negative-angle large-angle linear screen for effective screening of mineral slurry materials in industrial and mining enterprises and for dewatering coal slime in coal washing plants. Background Technology

[0002] Negative-angle linear screens are crucial equipment for screening slurry and coal slime. However, existing negative-angle linear screens have small negative angles, ranging from 1° to 5°, and short screen surfaces in the material flow direction, less than 6.1 meters. This results in incomplete classification and dewatering during slurry classification and coal slime dewatering, frequently leading to coarse material discharge. Because of the small negative angle of existing negative-angle linear screens, a belt conveyor is required for connection to the subsequent ball mill process. Existing spiral classifiers used in closed-loop systems with ball mills have low classification efficiency, large footprint, and high equipment costs. Due to these problems with existing classification equipment, it is difficult to achieve the desired performance in slurry classification and coal slime dewatering. Summary of the Invention

[0003] The purpose of this invention is to provide a negative inclination angle large-angle linear screen, which fundamentally solves the problems of low screening efficiency, large footprint, and high equipment cost of slurry and coal slime screening equipment.

[0004] This utility model is achieved through the following technical solution, including a vibrator, a screen box, a screen surface, a vibration damping support device, and a drive device; the screen box is connected to the vibration damping support device, the vibrator is installed on the screen box and connected to the drive device, characterized in that: the screen surface is composed of three sections, the horizontal section screen surface is located near the feed end of the screen box, the negative angle section screen surface is located in the middle section of the screen box to the discharge end of the screen box, and the arc-shaped transition section screen surface is located at the connection between the horizontal section screen surface and the negative angle section screen surface; the angle α between the negative angle section screen surface and the horizontal plane is 15°~20°; the arc radius R of the arc-shaped transition section screen surface is equal to 50~300mm.

[0005] The vertical height H between the upper edge of the rear baffle at the feed end of the screen box and the horizontal section of the screen surface is greater than or equal to 500mm.

[0006] The length of the horizontal section of the screen surface is 610~1220mm, and the length of the negative angle section of the screen surface along the material flow direction is 6100~9000mm.

[0007] The vibrator is either a forced synchronous vibrator or a self-synchronizing vibrator.

[0008] The beneficial effects of this invention are that the negative angle section of the screen surface forms an angle of 15° to 20° with the horizontal plane, maintaining a low feed end and a high discharge end, enabling the material to climb from a low position to a high position. When the negative angle large-angle linear screen and the ball mill are placed side by side in a closed loop, the material on the screen surface is transported from the low point to the high point of the discharge end, realizing direct transport of the screen surface material to the feed end of the ball mill, eliminating the need for a belt conveyor. Because the screen surface in the material flow direction is long enough, the slurry or coal slime can be fully screened after moving along the screen surface from the feed end to the discharge end. Compared with traditional vibrating screens, the negative angle large-angle vibrating screen not only improves screening efficiency but also reduces the equipment cost of the production line. The arc-shaped transition section of the screen surface reduces material accumulation at this point and reduces the resistance of the material running on the screen surface. It features a compact structure, convenient installation, good performance, and high screening efficiency, making it suitable for efficient classification of slurry materials in mining enterprises and dewatering of coal slime in coal washing plants. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] In the diagram, 1 is the vibrator, 2 is the screen box, 3 is the screen surface of the negative inclination angle section, 4 is the screen surface of the arc transition section, 5 is the screen surface of the horizontal section, 6 is the rear baffle, 7 is the rear vibration damping support device, and 8 is the front vibration damping support device; R is the radius of the screen surface of the arc transition section, α is the inclination angle of the screen surface of the negative inclination angle section, and H is the height of the rear baffle. Detailed Implementation

[0011] The specific embodiments of this utility model are described below with reference to the accompanying drawings:

[0012] The system includes a vibrator 1, a screen box 2, a screen surface, a vibration damping support device, and a drive device. The screen box 2 is connected to the vibration damping support device, and the vibrator 1 is mounted on the screen box 2 and connected to the drive device. The screen surface consists of three sections: a horizontal section 5 located near the feed end of the screen box 2; a negative angle section 3 located from the middle of the screen box 2 to the discharge end; and a circular arc transition section 4 located at the junction of the horizontal section 5 and the negative angle section 3. The angle α between the negative angle section 3 and the horizontal plane is 16°; the radius R of the circular arc transition section 4 is 150mm. The vertical height H between the upper edge of the rear baffle 6 at the feed end of the screen box 2 and the horizontal section 5 is 550mm. The length of the horizontal section 5 is 800mm, and the length of the negative angle section 3 along the material flow direction is 7000mm. The vibrator 1 is a forced synchronous vibrator.

[0013] The driving force of the drive device is transmitted to the vibrator 1, causing the vibrator 1 to drive the entire screen box 2 in a linear reciprocating motion. After the slurry or coal slurry enters the horizontal section of the screen surface 5 at the feed end, a material pool is temporarily formed. Under the reciprocating motion of the screen box 2, the material is initially dewatered and deslimed through the screen holes of the horizontal section of the screen surface 5. The upper plane of the material pool is lower than the upper edge of the rear baffle 6 and does not overflow, thus forming a dynamic balance. Some of the slurry or coal slurry moves uphill along the negative angle section of the screen surface 3 towards the discharge end. During the uphill process, the slurry or coal slurry gradually loses moisture, and the material on the screen surface is discharged from the discharge end, ending the screening process.

Claims

1. A negative-inclination large-angle straight-line screen, comprising a vibrator (1), a screen box (2), a screen surface, a damping support device and a driving device; the screen box (2) is connected with the damping support device, the vibrator (1) is installed on the screen box (2) and connected with the driving device, characterized in that: The screen surface is composed of three sections of screen surface, the horizontal section screen surface (5) is near the inlet end of the screen box (2), the screen surface from the middle section of the screen box (2) to the discharge end of the screen box (2) is the negative inclination section screen surface (3), and the connecting part of the horizontal section screen surface (5) and the negative inclination section screen surface (3) is the circular arc transition section screen surface (4); the included angle α between the negative inclination section screen surface (3) and the horizontal plane is 15-20°; the circular arc radius R of the circular arc transition section screen surface (4) is equal to 50-300 mm. ​ 2. The negative pitch, high angle, linear screen of claim 1 wherein: The vertical height H of the rear baffle (6) at the inlet end of the screen box (2) along the horizontal section screen surface (5) is greater than or equal to 500 mm.

3. The negative pitch, high angle, linear screen of claim 1 wherein: The length of the horizontal section screen surface (5) is 610-1220 mm, and the length of the negative inclination section screen surface (3) along the material flow direction is 6100-9000 mm.

4. The negative pitch, high angle, linear screen of claim 1 wherein: The vibrator (1) is a forced synchronous vibrator or a self-synchronous vibrator.

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