Cross sieve for coal as fired

Abstract

The utility model relates to a coal as fired cross screen which comprises a screening box, the screening box is arranged in an inclined mode, the upper end of the screening box is a feeding port, the bottom end of the screening box is a discharging port, a plurality of driving assemblies are arranged on the outer wall of the screening box, a screening assembly is arranged in the screening box, and the screening assembly comprises a plurality of screening units. The driving assembly is connected with the screening units, each screening unit comprises a rotating shaft, a shaft sleeve and screening pieces, the distance between every two adjacent screening pieces is 28 mm, a plurality of strip-shaped protrusions are arranged on the surface of each screening piece, and the screening pieces of every two adjacent screening units are arranged in a staggered mode. By improving the sieve piece structure of the cross sieve, the coal blocking frequency is reduced, the manual dredging frequency is reduced, meanwhile, the distance between every two sieve pieces is changed, so that the screening rate is improved, the workload of a coal crusher is reduced, the power consumption is reduced, and the particle size of coal as fired reaches a standard value.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal screening, particularly to a furnace charging coal cross screen. BACKGROUND

[0002] The cross screen adopts a combined structure of cross screen sheets, the screen surface is composed of a plurality of screen shafts rotating in the same direction, a plurality of equidistant screen sheets are installed on each screen shaft, and the screen sheets on adjacent screen shafts are arranged in cross. In the prior art, the particle size screening pass rate of the screen sheet is not high, and the screen sheet is prone to blockage, the frequency of dredging is high, and the production efficiency is low. SUMMARY

[0003] The utility model discloses a furnace charging coal cross screen, which improves the screen separation rate by improving the structure of the cross screen sheet, reduces the frequency of manual dredging, changes the distance between each screen sheet to improve the screen separation rate, reduces the workload of the coal crusher, reduces power consumption, and meets the standard value of the furnace charging coal particle size.

[0004] According to the furnace charging coal cross screen, the screen separation unit includes a plurality of screen separation units, the driving assembly and the screen separation unit are connected, the screen separation unit includes a rotating shaft, a shaft sleeve and a screen sheet, the distance between each screen sheet is 28mm, a plurality of strip protrusions are arranged on the surface of each screen sheet, the screen sheets of adjacent two screen separation units are staggered, the distance between every two adjacent rotating shafts is the same, and the size of the rotating shaft, the shaft sleeve and the screen sheet of each screen separation unit is the same.

[0005] Preferably, the angle of the inclined screen box is 30°

[0006] Preferably, 16 rotating shafts are arranged in the screen box.

[0007] Preferably, the conveying assembly is arranged below the plurality of screen separation units.

[0008] Preferably, the conveying assembly is a conveying belt.

[0009] Preferably, the driving assembly is a motor.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The distance between each screen sheet is changed from 32mm to 28mm, the screen sheet quantity is appropriately increased, the screening rate is improved, the work load of the coal crusher is reduced, the power consumption is reduced, the coal particle size reaching the furnace reaches the standard value, in addition, the strip-shaped protrusions are arranged on the surface of each screen sheet while the screen sheet quantity is increased, so that the coal blocking frequency is reduced, the manual dredging frequency is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 A structure schematic view of the cross screen of the coal entering the furnace is provided in the utility model.

[0013] Fig. 2 A top view structure schematic view of the screening unit is provided in the utility model.

[0014] Fig. 3 A screen sheet structure schematic view is provided in the utility model.

[0015] Illustration: 1, screening box; 2, driving assembly; 3, screening unit; 4, rotating shaft; 5, shaft sleeve; 6, screen sheet; 7, strip-shaped protrusion; 8, conveying assembly. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific implementation of the utility model will be further described in detail in combination with the drawings and examples.

[0017] In the description of the utility model, it is understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0018] In the utility model, unless otherwise explicitly specified and limited, if the terms "mounting", "connection", "connection", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0019] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms used herein are used for purposes of description only and are not intended to be limiting.

[0020] Referring to Figs. 1-3 , Fig. 1 The utility model discloses an embodiment of the furnace coal cross screen structure schematic diagram, the utility model discloses an embodiment provides the furnace coal cross screen, including screening box 1, screening box 1 is inclined to set, and the upper end of screening box 1 is feed inlet, and the bottom end of screening box 1 is discharge port, and the outer wall of screening box 1 is provided with a plurality of drive assemblies 2, and screening box 1 is provided with screening assembly, and the screening assembly includes a plurality of screening units 3, and drive assembly 2 is connected with screening unit 3, and screening unit 3 includes pivot 4, shaft sleeve 5 and sieve sheet 6, the spacing between each sieve sheet 6 is 28mm, and a plurality of strip protrusions 7 are arranged on the surface of each sieve sheet 6, and the sieve sheets of two adjacent screening units 3 are staggered, and the distance between every two adjacent pivot 4 is same, and the size of pivot 4, shaft sleeve 5 and sieve sheet 6 of each screening unit 3 is same. The spacing between each sieve sheet is changed from 32mm to 28mm, appropriately increases the sieve sheet amount, improves screening rate, reduces the work load of coal crusher, reduces power consumption, and the particle size of furnace coal reaches the standard value, but due to the increase of sieve sheet amount, the possibility of blockage is larger, so a plurality of strip protrusions are arranged on the surface of each sieve sheet, the coal blockage frequency is reduced, the manual dredging frequency is reduced, and the production efficiency is improved.

[0021] In one of the embodiments, further, the screening box 1 is inclined to set at an angle of 30°. The inclination angle should not be too large, and a large angle will shorten the material residence time and affect the screening effect.

[0022] In one of the embodiments, further, the screening box 1 is provided with 16 pivots.

[0023] In one of the embodiments, further, the utility model further includes a conveying assembly 8, which is arranged below the plurality of screening units 3. Preferably, the conveying assembly 8 is a conveyor belt. The conveying assembly collects the small coal material screened and then conveys the small coal material to the boiler coal bunker.

[0024] In one of the embodiments, further, the drive assembly 2 is a motor.

[0025] The working mode of the utility model is: coal is fed from the feed inlet on the upper end of the screening box, and is screened through the screening units, and since the two screening units are staggered and have a certain gap, the material smaller than the gap will fall between the rotating shafts of the screening units to the conveying assembly below the screening units, the conveying assembly collects and conveys it to the use position, and the material larger than the gap is discharged from the discharge port at the bottom end of the screening box and is sent to the underlying coal crusher.

[0026] The above-mentioned embodiments only express several implementation manners of the utility model, and the description is relatively specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A cross screen for coal fed into a furnace, characterized in that, The system includes a screening box, which is inclined. The upper end of the screening box is the feed inlet, and the lower end is the discharge outlet. The outer wall of the screening box is equipped with multiple drive components, and the screening assembly is installed inside the screening box. The screening assembly includes multiple screening units. The drive components are connected to the screening units. Each screening unit includes a rotating shaft, a bushing, and screen plates. The spacing between each screen plate is 28 mm, and the surface of each screen plate is provided with several strip-shaped protrusions. The screen plates of two adjacent screening units are staggered. The distance between any two adjacent rotating shafts is the same. The size of the rotating shaft, bushing, and screen plates of each screening unit is the same.

2. The cross-screen for coal feed to the furnace according to claim 1, characterized in that, The screening box is tilted at an angle of 30°.

3. The cross-screen for coal feed according to claim 1, characterized in that, The screening box is equipped with 16 rotating shafts.

4. The cross-screen for coal feed according to claim 1, characterized in that, It also includes a conveying component disposed below the plurality of screening units.

5. The cross-screen for coal feed to the furnace according to claim 4, characterized in that, The conveying component is a conveyor belt.

6. The cross-screen for coal feed to the furnace according to claim 1, characterized in that, The drive component is a motor.

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