Unpowered anti-blocking grate bar slide sieve

Abstract

An unpowered anti-blocking grate bar slide sieve comprises a sieve plate (1). The sieve plate (1) is provided with a plurality of gaps (3) in the material sliding direction, wherein one end of every gap (3) is open. Grate bars (2) are arranged between the adjacent gaps (3). The unpowered anti-blocking grate bar slide sieve is characterized in that the sieve plate is installed on a beam (4) inside a sieve body or an external fixable object and is inclined in the material sliding direction relative to the horizontal plane, one end of the sieve plate (1) is located below a feeding port (6), and the other end of the sieve plate (1) is provided with a discharging port (5). The unpowered anti-blocking grate bar slide sieve is unpowered, does not block materials and is low in production loss, gaps of the grate bars can be adjusted on the site according to material grain size requirements of a device or a client, the grate bars are made of alloy castings, the slide sieve is ultra high in abrasion resistance and heavy load, high in corrosion resistance, low in manufacturing cost, simple to install and maintain and small in occupied space, concentrated sieving of products is achieved, materials are collected in a concentrated mode, the capacity requirements of large mining devices can be met, and the materials with the grain sizes of 3-300mm can be sieved.

Description

technical field [0001] The invention relates to material screening equipment, in particular to a non-powered anti-jamming grate sieve, which is used for screening materials with coarse and fine materials. Background technique [0002] The existing screening equipment with grate sieve mainly adopts the method of dynamic vibration screening. The downward sliding and screening of materials mainly rely on the strong vibration of the vibration source to promote the coarse and fine materials (powder) of the screened materials. produce segregation. The segregation effect makes the fine material sink gradually, from the upper surface of the screen (bar), through the mesh (bar) of the screen (bar), to reach under the screen (bar) of the vibrating screen, and be discharged as undersize Vibrating sieve, the undersieve here is commonly known as fine material. Coarse material particles float up due to the gradual sinking of fine material particles, and cannot pass through the screen or...

AI Technical Summary

Problems solved by technology

[0003] Published on May 2, 2012, the publication number is 102430517A, and the application number is 201110410605.4. It is a Chinese invention patent named "a vibrating sieve". First of all, it is a vibrating sieve. The work needs to consume electric energy, and the sieve body is easily damaged by vibration. , the maintenance rate and maintenance cost are high, and the delay in work and time will affect the production efficiency; secondly, it can only be used for coarse powder or fine powder screening. Like other traditional screens, it has poor impact resistance, small load and low production capacity; The width of the grate bar and groove at the material end is equal to the width of the grate bar and groove at the discharge end. It is easy to pinch and jam materials, and it is difficult to arrange the grate bars evenly or vertically during the installation process. This structure is not suitable for screening materials. The sliding of a large amount of materials should follow the natural law of getting wider and wider. When heavier and larger granular materials are stuck somewhere in the gap between the screen bars, even if there is power, it is not easy to sieve out the stuck material, and the jammed product will occur. The chain accumulation of raw materials will cause production stoppage, damage to equipment, and quality accidents of finished materials mixed with semi-finished materials; fourth, the grate bar is flat, and in the process of material slipping, fine materials are easy to follow the large particles along the surface of the grate bar. Load slip, resulting in insufficient material sieving and analysis, and serious mixing; fifth, because the sieve body is formed by a hollow-shaped long slide tube, the wear resistance is poor; the length direction of the sieve plate is 3-20 times the width direction. The materials sieved by the overly long sieve body are not easy to be collected centrally, and can only be collected in sections, which covers a large area, small screening area, and low production capacity; It is suitable for installing screening in narrow spaces, and because each section of the sieve plate is a whole, when the sieve bar is damaged, it is inconvenient to maintain

[0004] The Chinese patent application with the application number 201210231281.2 titled "An Anti-Seize Grate Screen" makes up for the fact that the grate bar and groove width at the feed end are equal to the grate bar and groove width at the discharge end in the above-mentioned patent application, which causes material jamming and jamming. However, due to the rectangular sieve body, the sieve plate area is small, the sieve surface is narrow, and the material distribution range is small, which cannot meet the screening needs of large-scale mining equipment with an hourly production capacity of hundreds of tons or more, and the materials under the sieve are not easy to collect centrally, such as sieve The quantity of the grid increases, and additional supporting conveyor belts and other equipment are required, which occupy a large area; the structure of the grate bar support and the beam is unreasonable, and the top of the beam is set on a wide horizontal plane. It is fixed by riveting and welding, which is not easy to install and maintain, and it is not easy to adjust the gap between the grate bars according to the particle size of the screened material. Because there is no screen mesh, it is impossible to provide products with smaller particle size and more standard time. It is only suitable for coarse Screening or pre-screening, the screening effect cannot meet the quality standards of the national machine-made sand and gravel, the needle-containing flake particles exceed the standard, and the production cost is high

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