阅读说明：本技术 一种原煤筛分用大粒度筛 (Large-granularity screen for screening raw coal ) 是由 孔勇 张溪溪 杨志强 邱瑞雪 谢晋 刘学翠 于 2020-07-10 设计创作，主要内容包括：本发明公开一种原煤筛分用大粒度筛,包括底座,底座上固定安装筛选箱,筛选箱内部设有筛选室,筛选室倾斜设置,筛选室上端设有进料口,筛选室下端设有第一出料口,进料口下方的筛选室侧壁固定安装导料板,筛选室底部固定安装若干滚轴,滚轴与筛选室侧壁密封转动连接,滚轴表面固定安装若干滚轮,滚轴一端通过联轴器与驱动机构连接,驱动机构包括固定座,固定座上固定安装若干驱动轮,驱动轮之间通过链条连接,驱动轮的转轴与减速机的输出端连接,减速机的输入端与电机的输出轴连接,电机固定安装在电机座上,电机座固定安装在底座上。本发明采用椭圆式滚轮,增强了对物料的拨送能力,避免了筛面卡堵现象,且大大增加了大粒度物料的筛分效率。(The invention discloses a large-granularity screen for screening raw coal, which comprises a base, wherein a screening box is fixedly installed on the base, a screening chamber is arranged in the screening box, the screening chamber is obliquely arranged, a feed inlet is formed in the upper end of the screening chamber, a first discharge outlet is formed in the lower end of the screening chamber, a material guide plate is fixedly installed on the side wall of the screening chamber below the feed inlet, a plurality of rolling shafts are fixedly installed at the bottom of the screening chamber, the rolling shafts are in sealed rotating connection with the side wall of the screening chamber, a plurality of rolling wheels are fixedly installed on the surfaces of the rolling shafts, one end of each rolling shaft is connected with a driving mechanism through a coupler, each driving mechanism comprises a fixed seat, a plurality of driving wheels are fixedly installed on the fixed seat, the driving wheels are connected through chains, rotating shafts of the. The invention adopts the elliptical roller, enhances the material stirring and conveying capacity, avoids the blocking phenomenon of the screen surface, and greatly increases the screening efficiency of large-granularity materials.)

1. The large-granularity screen for screening raw coal is characterized by comprising a base (1), wherein a screening box (2) is fixedly installed on the base (1), a screening chamber (3) is arranged inside the screening box (2), the screening chamber (3) is obliquely arranged, a feeding hole (4) is formed in the upper end of the screening chamber (3), a first discharging hole (5) is formed in the lower end of the screening chamber (3), a material guide plate (6) is fixedly installed on the side wall of the screening chamber (3) below the feeding hole (4), a plurality of rolling shafts (7) are fixedly installed at the bottom of the screening chamber (3), the rolling shafts (7) are rotatably connected with the side wall of the screening chamber (3) in a sealing mode, a plurality of idler wheels (8) are fixedly installed on the surfaces of the rolling shafts (7), one ends of the rolling shafts (7) are connected with a driving mechanism (10) through couplers (9), and the driving mechanism (10) comprises a, the utility model discloses a motor, including fixing base (11), fixed mounting is a plurality of drive wheels (12) on fixing base (11), connect through the chain between drive wheel (12), the pivot of drive wheel (12) is connected with the output of speed reducer (13), the input of speed reducer (13) is connected with the output shaft of motor (14), speed reducer (13) and motor (14) fixed mounting are on motor cabinet (15), motor cabinet (15) fixed mounting is on base (1).

2. The large-particle-size screen for screening raw coal according to claim 1, wherein an included angle between the bottom of the screening chamber (3) and the horizontal direction is 30-45 degrees, a blanking port (16) is arranged at a gap, corresponding to the roller (7), at the bottom of the screening chamber (3), a fine material chamber (17) is connected below the blanking port (16), the fine material chamber (17) is arranged at the bottom of the screening box (2), and a second discharge port (18) is arranged on one side, close to the feed port (4), of the fine material chamber (17).

3. The large-granularity screen for screening raw coal as claimed in claim 1, wherein the rollers (7) are uniformly and equidistantly arranged along the bottom of the screening chamber (3), the axis connecting line of the rollers (7) is parallel to the bottom of the screening chamber (3), and one end of each roller (7) is connected with the rotating shaft of the driving wheel (12) through a coupler (9).

4. The large-granularity screen for screening raw coal as claimed in claim 1, wherein the rollers (8) are elliptical rollers, the rollers (8) are uniformly and equidistantly arranged along the axial direction of the roller (7), and the elliptical long axis of the roller (8) on the roller (7) corresponds to the elliptical short axis of the roller (8) on the adjacent roller (7).

Technical Field

The invention relates to the field of raw coal screening, in particular to a large-granularity screen for raw coal screening.

Background

The screening mechanical equipment is characterized in that various bulk materials are screened according to the action principles of rotation, vibration, reciprocation, shaking and the like, and are classified into a plurality of grades according to the granularity of the materials, or moisture, impurities and the like in the bulk materials are removed, and then the next processing and the product quality are improved. Depending on the structure and the working principle, screening machines can be broadly divided into the following categories: fixed screens, cylindrical screens, planar motion screens, vibrating screens, roller screens, and the like. Screening of large particle size in raw coal screening is always a difficult problem of material screening, and when materials with particle sizes larger than 200mm are processed and screened, most of existing screening equipment is a slideway screen. The large-granularity materials are mostly irregular in shape, and the sliding way sieve shifting teeth are often blocked, so that equipment is stopped, and production operation is influenced.

The patent with publication number CN103537431B discloses a roller screen for coal, which comprises a material distribution device arranged at a feed inlet, an iron remover arranged at the upper end of a screen surface, and a screen surface consisting of a roller screen shaft and a screen bar screen shaft, wherein more than two discharge outlets are arranged below the screen surface. The device sieves through the epaxial screen cut of drum sieve, and the material also can block up the screen cut, can lead to the screening effect relatively poor and efficiency reduction when the screen cut blocks up.

Disclosure of Invention

In order to solve the defects in the prior art, the invention aims to provide the large-granularity screen for screening the raw coal, which adopts the elliptical roller, enhances the material poking and conveying capacity, avoids the blocking phenomenon of the screen surface and greatly increases the screening efficiency of the large-granularity material.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a raw coal screening is with big granularity sieve, the on-line screen storage device comprises a base, fixed mounting screening case on the base, the inside screening chamber that is equipped with of screening case, the slope of screening chamber sets up, the screening chamber upper end is equipped with the feed inlet, the screening chamber lower extreme is equipped with first discharge gate, the screening chamber lateral wall fixed mounting stock guide of feed inlet below, a plurality of rollers of screening chamber bottom fixed mounting, the roller bearing rotates with the sealed of screening chamber lateral wall to be connected, a plurality of gyro wheels of roller bearing fixed surface installation, roller bearing one end is passed through the shaft coupling and is connected with actuating mechanism, actuating mechanism includes the fixing base, a plurality of drive wheels of fixed mounting on the fixing base, connect through the chain between the drive wheel, the pivot of drive wheel is connected with the output of speed reducer, the input.

The bottom of the screening chamber and the horizontal direction form an included angle of 30-45 degrees, a blanking port is arranged at the position, corresponding to the gap of the roller, of the bottom of the screening chamber, the lower portion of the blanking port is connected with the fine material chamber, the fine material chamber is arranged at the bottom of the screening box, and a second discharge port is arranged on one side, close to the feed port, of the fine material chamber.

The roller shafts are uniformly and equidistantly arranged along the bottom of the screening chamber, the shaft connecting line of the roller shafts is parallel to the bottom of the screening chamber, and one end of each roller shaft is connected with the rotating shaft of the driving wheel through a coupler.

The rollers are oval rollers, the rollers are evenly arranged along the axial direction of the roller at equal intervals, and the oval long shafts of the rollers on the roller correspond to the oval short shafts of the rollers on the adjacent roller.

The invention has the beneficial effects that:

1. compared with the traditional slide-to-screen sieve, the pull-over of the elliptic roller is smooth, the material blockage is not easy to occur compared with the existing dart-shaped pull-over teeth, the installation angle of the screen surface of the equipment is large, and the forward pull-over effect of large-granularity materials along with the action of gravity is greatly improved.

2. The large-granularity sieve has the advantages that the single motor simultaneously drives the plurality of rollers, so that the plurality of rollers can keep synchronous rotation, the rollers adopt an elliptical structure, the elliptical long axis of the roller on one roller corresponds to the short axis of the roller on the adjacent roller, when the rollers synchronously rotate, the gap between the rollers on the adjacent rollers can be kept unchanged, and the conditions of sieve surface interference and sieving granularity change can be avoided.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic view of the front view configuration of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a schematic view of the construction of the roller and drive mechanism of the present invention;

fig. 5 is a schematic view of the structure of the roller of the adjacent roller of the present invention.

In the figure:

1-base, 2-screening box, 3-screening chamber, 4-feeding hole, 5-first discharging hole, 6-guide plate, 7-rolling shaft, 8-rolling wheel, 9-coupling, 10-driving mechanism, 11-fixing seat, 12-driving wheel, 13-speed reducer, 14-motor, 15-motor seat, 17-fine material chamber, and 18-second discharging hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

As shown in fig. 1-5, a large-granularity screen for screening raw coal comprises a base 1, a screening box 2 is fixedly mounted on the base 1, a screening chamber 3 is arranged in the screening box 2, the screening chamber 3 is obliquely arranged, a feed inlet 4 is arranged at the upper end of the screening chamber 3, a first discharge outlet 5 is arranged at the lower end of the screening chamber 3, a material guide plate 6 is fixedly mounted on the side wall of the screening chamber 3 below the feed inlet 4, a plurality of rolling shafts 7 are fixedly mounted at the bottom of the screening chamber 3, the rolling shafts 7 are in sealed and rotary connection with the side wall of the screening chamber 3, a plurality of rolling wheels 8 are fixedly mounted on the surfaces of the rolling shafts 7, one end of each rolling shaft 7 is connected with a driving mechanism 10 through a coupling 9, the driving mechanism 10 comprises a fixed seat 11, a plurality of driving wheels 12 are fixedly mounted on the fixed seat 11, the driving wheels, the speed reducer 13 and the motor 14 are fixedly installed on the motor base 15, and the motor base 15 is fixedly installed on the base 1.

The bottom of the screening chamber 3 and the included angle of the horizontal direction are 30-45 degrees, a blanking port 16 is arranged at the position of the bottom of the screening chamber 3 corresponding to the gap of the roller 7, the lower part of the blanking port 16 is connected with a fine material chamber 17, the fine material chamber 17 is arranged at the bottom of the screening box 2, and a second discharging port 18 is arranged on one side, close to the feeding port 4, of the fine material chamber 17.

The rollers 7 are uniformly arranged at equal intervals along the bottom of the screening chamber 3, the axis connecting line of the rollers 7 is parallel to the bottom of the screening chamber 3, and one end of each roller 7 is connected with the rotating shaft of the driving wheel 12 through a coupler 9.

The rollers 8 are oval rollers, the rollers 8 are evenly arranged along the axial direction of the rolling shaft 7 at equal intervals, and the oval major axis of each roller 8 on the rolling shaft 7 corresponds to the oval minor axis of each roller 8 on the adjacent rolling shaft 7.

The working principle is as follows:

when the device is used for screening raw coal, the raw coal to be screened is added into the screening chamber 3 from the feeding hole 4, the raw coal rolls to the upper part of the rolling shaft 7 under the action of the material guide plate 6, and then is continuously pushed forward by a plurality of groups of rolling shafts 7, wherein the raw coal is smaller than the gap between the rolling shafts 7, falls into the fine material chamber 17, is larger than the gap between the rolling shafts 7, and flows out from the first discharging hole 5 on the screen along with the continuous pushing of the oval rolling wheel 8.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.