Sieve plate for hammer crusher

Abstract

The utility model relates to a sieve plate for a hammer crusher, the whole sieve plate is formed by curling a thin steel plate, the sieve plate is semicircular, and the working part of the sieve plate is provided with sieve pores with variable pore diameters. The utility model mainly aims to provide the sieve plate for the hammer crusher, the novel sieve plate is made of a wear-resistant thin steel plate, the steel plate is rolled into a semicircle, the structure is light and handy, the aperture ratio is high, sieve holes in the sieve net are gradually enlarged, and the sieve holes are gradually enlarged from the feeding end to the discharging end, so that coal slime can quickly pass through the sieve holes after being crushed, and the service life of the sieve plate is prolonged. And shutdown of the crusher caused by blockage of sieve pores due to adhesion of the coal slime is avoided.

Description

Technical Field

[0001] The utility model relates to a screen plate, in particular to a screen plate for a hammer crusher. Background Art

[0002] my country is a large coal producer. The coal preparation industry produces a large amount of tailings slime every year. The slime has high moisture content and high viscosity, making it difficult to sell. This causes a large amount of slime to accumulate in coal washing plants, polluting the environment and wasting resources. With the advancement of filter press technology, high-pressure filter presses can reduce the moisture content of slime filter cakes to below 17%. Crushing and utilizing slime filter cakes has become an industry trend. The traditional hammer crusher is used to crush the slime filter cake. The high-speed rotating rotor interacts with the screen plate to refine the slime particles and ensure the particle size of the product.

[0003] However, the traditional hammer crusher screen plate structure adopts alloy integral casting, and the curvature of the traditional screen plate is small, even close to the flat plate structure. At the same time, the structure of the traditional screen plate is heavy, the production cost is high, and the screen hole size is fixed and the screen hole thickness is large, which makes the coal slime easily block the screen hole. Utility Model Content

[0004] The main purpose of the utility model is to provide a screen plate for a hammer crusher. The new screen plate is made of wear-resistant thin steel plate, which is rolled into a semicircle. It has a light structure and a high opening rate. The screen holes on the screen adopt a gradually enlarged layout, from the feed end to the discharge end. The screen holes are small to large, which is convenient for the coal slime to pass through the screen holes quickly after being crushed, avoiding the crusher shutdown due to the adhesion and clogging of the screen holes by the coal slime.

[0005] In order to achieve the above purpose, the utility model provides a sieve plate for a hammer crusher. The sieve plate is made of a thin rolled steel plate as a whole, and is semicircular. The working part of the sieve plate is provided with sieve holes with varying apertures.

[0006] Preferably, the sieve holes are in a teardrop shape, the small openings of the sieve holes face the feeding direction of the sieve plate, and the sieve holes are evenly distributed in the working part of the sieve plate.

[0007] Preferably, the sieve holes are waist-shaped, the width of the sieve holes in the width direction of the sieve plate gradually increases along the feeding direction of the sieve plate, and the length of the sieve holes in the length direction of the sieve plate remains unchanged.

[0008] Further preferably, rubber pads are provided on both sides of the sieve plate in the length direction.

[0009] More preferably, a plurality of inclined notches are provided in the width direction of the rubber pad.

[0010] More preferably, the rubber pad is screwed to the screen plate via bolts.

[0011] The beneficial effects of the utility model are:

[0012] The utility model screen is made of thin wear-resistant steel plate, which is rolled into a semicircle. It has a light structure and a high aperture rate. The screen holes on the screen adopt a gradual enlargement layout. The screen holes increase from small to large from the feed end to the discharge end, which is convenient for the coal slime to quickly pass through the screen holes after crushing, avoiding the crusher shutdown caused by coal slime adhesion and clogging of the screen holes. The coal slime filter cake enters the hammer crusher and is crushed by the rotor. The coal slime particles smaller than the gradual screen holes are directly discharged, and the larger ones remain on the upper side of the screen and are crushed again by the crushing roller. The small pieces of coal slime particles produced after crushing are directly discharged through the screen holes, and the large pieces of coal slime particles continue to remain on the screen for crushing. This reciprocating process completes the crushing of the coal slime filter cake.

[0013] The screen plate of the utility model ensures that the crushed coal slime passes through, and at the same time is not easy to adhere to the screen or block the screen holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the screen plate of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the screen plate of the utility model from another angle;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the second embodiment of the screen plate of the utility model.

[0018] Description of Reference Numerals

[0019] 100, sieve plate; 110, sieve hole; 120, perforation;

[0020] 200. Rubber pad. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below. Embodiment 1

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a sieve plate for a hammer crusher. The sieve plate is made of a thin steel plate that is curled into a semicircular shape. Sieve holes with varying apertures are evenly distributed on the working part of the sieve plate.

[0023] Specifically, in this embodiment, the mesh holes are waist-shaped, the width of the mesh holes in the width direction of the mesh plate gradually increases along the feeding direction of the mesh plate, and the length of the mesh holes in the length direction of the mesh plate remains unchanged. In other words, the mesh holes gradually increase along the feeding direction. During the manufacturing process, the length of the mesh holes remains unchanged, but gradually changes in the width direction (e.g., Figure 1 and Figure 2 As shown, the arrow indicates the movement direction of the coal slime filter cake). In addition, it should be noted that the width of the sieve holes in the same row is constant, that is, the width of the sieve holes in the same column gradually increases, the width of the sieve holes in the same row remains unchanged, and at the same time, the lengths of all the sieve holes are equal.

[0024] When the coal slime filter cake enters the hammer crusher and is crushed by the rotor, the fine particles are directly discharged from the sieve plate through the sieve holes, while the larger particles continue to move along the sieve plate. As the large particles are crushed into small particles by the rotor, these small particles will be discharged from the sieve plate again. As the coal slime filter cake continues to move forward, the rotor continues to crush the large particles into small particles and then discharge them from the sieve plate. In this way, large particles will not be stuck on the sieve holes, and at the same time, coal slime particles will not enter the sieve holes and block the sieve holes. The ladder-type crushing and discharge method of the coal slime filter cake ensures the normal operation of the sieve plate.

[0025] In addition, in this embodiment, Figure 1 and Figure 2 As shown, rubber pads are provided on both sides of the length direction of the screen plate. Depending on the working environment of the rubber pads, the rubber pads may be deformed due to long-term compression, which may lead to unstable installation of the screen plate. Therefore, multiple inclined notches are provided in the width direction of the rubber pads to release the stress deformation generated by the rubber pads.

[0026] In this embodiment, the rubber pad is screwed to the screen plate by bolts. Figure 1 and Figure 2 As shown, through holes are respectively provided at both ends of the screen plate in the length direction. Similarly, through holes are provided at corresponding positions of the rubber pad. One end of the bolt passes through the through hole and the through hole in sequence and is connected with the nut.

[0027] Second embodiment

[0028] like Figure 3 As shown, in this embodiment, the sieve holes are designed to be water drop-shaped, with the small end of the sieve holes facing the feeding direction of the sieve plate, and the sieve holes are evenly distributed in the working part of the sieve plate. The water drop-shaped sieve holes reduce the accumulation of materials at the edge of the sieve holes due to their tip design. At the same time, the water drop-shaped sieve holes can also reduce the friction and retention of materials at the sieve holes, ultimately reducing the risk of coal slime filter cakes blocking the sieve holes.

[0029] In this embodiment, rubber pads are also provided at both ends of the screen plate in the length direction. The structure and installation method of the rubber pads are the same as those in the first embodiment and will not be described in detail in this embodiment.

[0030] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A screen plate for a hammer crusher, characterized in that: The sieve plate is used for screening coal slime filter cakes. The sieve plate is made of a rolled thin steel plate as a whole. The sieve plate is semicircular. The working part of the sieve plate is provided with sieve holes with varying apertures. The sieve holes are waist-shaped. The width of the sieve holes in the width direction of the sieve plate gradually increases along the feeding direction of the sieve plate, and the length of the sieve holes in the length direction of the sieve plate remains unchanged.

2. A screen plate for a hammer crusher according to claim 1, characterized in that: Rubber pads are respectively arranged on both sides of the sieve plate in the length direction.

3. A screen plate for a hammer crusher according to claim 2, characterized in that: A plurality of inclined notches are arranged in the width direction of the rubber pad.

4. A screen plate for a hammer crusher according to claim 2, characterized in that: The rubber pad is screwed to the screen plate via bolts.

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