Graded screening device for raw coal

Abstract

The utility model discloses a grading screening device for raw coal, and relates to the technical field of raw coal screening, the grading screening device comprises a screening box, mounting grooves are uniformly formed in the screening box, sliding blocks are connected in the mounting grooves in a sliding mode, the surfaces of the sliding blocks are fixedly connected with screening boxes, and the screening boxes are arranged in multiple groups from top to bottom; screening holes are formed in the bottom of the screening box, the diameters of the screening holes are sequentially reduced from top to bottom, and a discharging opening is fixedly connected to the surface of the screening box. The grading screening assembly is arranged, raw coal is screened through mutual cooperation of multiple sets of screening boxes and screening holes, a rotating motor drives a rotating shaft and screening blades to rotate, the raw coal is driven to move in the screening boxes through rotation of the screening blades, the raw coal is subjected to multi-stage screening through the screening holes, and the screening efficiency is improved; and the multiple sets of screening boxes are arranged on the inner wall of the screening box, dust overflow is reduced, the influence of dust on the environment is reduced, and the influence on the health of workers is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of raw coal screening, in particular to a raw coal grading screening device. BACKGROUND

[0002] In the coal sample laboratory of the coal washing plant, different coal samples need to be tested, so the coal samples need to be screened. In the prior art, the screening of the coal samples is all completed by manual work. With the increasing frequency of raw coal screening tests, the problems of high labor intensity, low efficiency and poor screening effect of the existing pure manual screening are increasingly prominent, which brings many inconveniences to internal production tests and customer use requirements.

[0003] After searching, the existing published patent number: CN202022489636.0, published patent name: a raw coal screening device, including first filter screen, second filter screen, vibration device, coal storage bin. Among them, the vibration device is located on the first filter screen and the second filter screen, the first filter screen and the second filter screen are placed inclinedly relative to the ground, and the first filter screen is located above the second filter screen. The hole diameter on the first filter screen is larger than the hole diameter on the second filter screen, and a weight sensor is arranged on the second filter screen. A belt conveyor is arranged between the first filter screen and the coal storage bin, a coal residue bin is arranged between the second filter screen and the coal storage bin, and a coal powder bin is arranged below the second filter screen. The raw coal screening device provided in the application is provided with a vibration device on the first filter screen and the second filter screen, and a weight sensor is arranged on the second filter screen. In this way, while ensuring that the holes on the filter screen can continuously realize the filtering function, the power consumption is also reduced, and the problem of low screening efficiency caused by the blockage of the holes on the filter screen by particulate matter during the raw coal screening process is solved.

[0004] However, the above-mentioned device has the problems of a large amount of dust generated by vibration, affecting the health of workers and poor screening effect when screening raw coal, and there is room for improvement. UTILITY MODEL CONTENT

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the utility model provides a raw coal grading screening device, which solves the problem of a large amount of dust generated by vibration, affecting the health of workers when screening raw coal.

[0007] Technical scheme

[0008] In order to achieve the above purpose, the utility model is implemented by the following technical scheme: a raw coal grading screening device, comprising: a screening box, the top of the screening box is fixedly connected with a sealing cover, a feeding port is formed in the surface of the sealing cover, and a grading screening assembly is arranged on the screening box;

[0009] The hierarchical screening assembly comprises a rotary motor fixedly installed at the top of the sealing cover, an output shaft end of the rotary motor is fixedly connected with a rotating shaft, the rotating shaft is rotationally connected in the screening box, rotating shaft surfaces are uniformly distributed with screening blades, the screening box is uniformly provided with mounting grooves inside, the mounting grooves are slidably connected with sliding blocks, the sliding blocks are fixedly connected with screening boxes on the surfaces, the screening boxes are provided with multiple groups from top to bottom, the screening boxes are provided with screening holes at the bottoms, the screening holes are sequentially reduced in diameters from top to bottom, and the screening boxes are fixedly connected with discharge ports on the surfaces.

[0010] Preferably, the screening box is provided with discharge ports on the surface, and the discharge ports are correspondingly arranged with the discharge ports from top to bottom.

[0011] Preferably, the screening box is provided with locking bolts on the surface in threaded connection, and the discharge ports are provided with threaded holes matched with the locking bolts on the surfaces.

[0012] Preferably, the screening blades are sequentially provided with multiple groups from top to bottom, the screening blades in each group are correspondingly arranged with the screening boxes, and the screening blades are arranged in close contact with the bottoms of the screening boxes.

[0013] Preferably, the screening blades and the screening boxes are of the same height, and the sliding blocks are slidably connected in the mounting grooves.

[0014] Preferably, the screening box is provided with a shaking assembly at the bottom, the screening box is uniformly distributed with buffer springs at the bottom, the buffer springs are fixedly connected with bases at the bottoms, and the screening box is fixedly connected with a vibrating motor at the bottom.

[0015] Preferably, the vibrating motor is arranged at the center of the bottom of the screening box, and the feeding port is fixedly connected with a feeding pipe at the top.

[0016] Beneficial effects

[0017] Compared with the prior art, the hierarchical screening device for raw coal at least has the following beneficial effects:

[0018] The hierarchical screening assembly is arranged, the raw coal is screened through the cooperation of multiple screening boxes and screening holes, the rotating shaft and the screening blades are driven to rotate through the rotary motor, the raw coal is driven to move in the screening box through the rotation of the screening blades, the raw coal is screened through multiple screening holes, the screening efficiency is improved, the multiple screening boxes are arranged on the inner wall of the screening box, the overflow of dust is reduced, the influence of dust on the environment is reduced, and the influence on the health of the workers is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The figure is a structural schematic view of the utility model;

[0020] Figure 2The utility model discloses a structure schematic drawing of the shaking assembly.

[0021] Figure 3 The utility model discloses a structure schematic drawing inside the screening box.

[0022] Figure 4 The utility model discloses a structure schematic drawing of the grading screening assembly.

[0023] In the drawing: 1, screening box;2, sealing cover;3, feed inlet;4, grading screening assembly;401, rotating motor;402, rotating shaft;403, screening blade;404, screening box;405, screening hole;406, mounting groove;407, sliding block;408, discharge port;409, discharge port;410, locking bolt;5, shaking assembly;501, buffer spring;502, base;503, vibration motor. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the range of protection of the utility model.

[0025] Embodiment one:

[0026] Please refer to Figures 1-4 The utility model provides a technical scheme: screening box 1, screening box 1 top fixedly connected with sealing cover 2, is equipped with feed inlet 3 on sealing cover 2 surface, is provided with grading screening assembly 4 on screening box 1;

[0027] Grading screening assembly 4 includes rotating motor 401 fixedly installed on the top of sealing cover 2, and the output shaft end of rotating motor 401 is fixedly connected with rotating shaft 402, and rotating shaft 402 is rotatably connected in the inside of screening box 1, and rotating shaft 402 surface evenly distributes screening blade 403, and the inside of screening box 1 evenly is equipped with mounting groove 406, and sliding block 407 is slidably connected in mounting groove 406, and the surface of sliding block 407 is fixedly connected with screening box 404, and screening box 404 sets up multiple from top to bottom, and screening box 404 bottom is equipped with screening hole 405, and the diameter of screening hole 405 decreases gradually from top to bottom, and the surface of screening box 404 is fixedly connected with discharge port 408.

[0028] The raw coal to be screened is added into the screening box 1 from the feeding port 3, and the raw coal is screened through the cooperation of multiple sets of screening boxes 404 and screening holes 405, the rotating shaft 402 and the screening blades 403 are driven to rotate by the rotating motor 401, the raw coal is moved in the screening box 404 through the rotation of the screening blades 403, the raw coal is screened in multiple stages through the screening holes 405, the screening efficiency is improved, the multiple sets of screening boxes 404 are arranged on the inner wall of the screening box 1, the overflow of dust is reduced, the influence of dust on the environment is reduced, the influence of dust on the health of workers is reduced, the small particle raw coal is gradually moved downward, the large particle raw coal is moved to the discharge port 408 under the driving of the screening blades 403, and finally is discharged from the discharge port 409 in sequence, and the classification screening of the raw coal is realized.

[0029] Embodiment two:

[0030] Please refer to Figures 1-4 , the utility model provides a technical scheme based on embodiment one: the surface of screening box 1 is provided with discharge port 409, and discharge port 409 is correspondingly arranged with discharge port 408 from top to bottom.

[0031] The above content is analyzed: the screened raw coal is discharged from the discharge port 409, and the classification screening of the raw coal is realized.

[0032] Embodiment three:

[0033] Please refer to Figures 1-4 , the utility model provides a technical scheme based on embodiment one: the surface of screening box 1 is provided with locking bolt 410, and the surface of discharge port 409 is provided with threaded hole matched with locking bolt 410.

[0034] The above content is analyzed: the position of the sliding block 407 is locked by the locking bolt 410, so that the position of the screening box 404 is fixed, the spacing of the screening box 404 is changed, and the screening box 404 is installed and disassembled.

[0035] Embodiment four:

[0036] Please refer to Figures 1-4 , the utility model provides a technical scheme based on embodiment one: the surface of screening box 1 is provided with locking bolt 410, and the surface of discharge port 409 is provided with threaded hole matched with locking bolt 410.

[0037] The above content is analyzed: the raw coal is moved in the screening box 404 through the movement of the screening blades 403, and the raw coal is screened through the screening holes 405. Small particle raw coal is discharged from the screening hole 405, and large particle raw coal is discharged from the discharge port 408.

[0038] Embodiment five:

[0039] Please refer to Figures 1-4 The utility model provides a technical scheme based on example one: the screening blade 403 is same in height with the screening box 404, the sliding block 407 is slidably connected in the mounting groove 406.

[0040] The above content is analyzed: the screening box 404 is rotated by the rotation of the screening blade 403, and the raw coal is moved by the screening box 404, and the raw coal is screened. The sliding block 407 is limitedly installed by the mounting groove 406, facilitating the installation and dismounting of the screening box 404.

[0041] Example six:

[0042] Please refer to Figures 1-4 The utility model provides a technical scheme based on example one: the screening box 1 bottom is provided with the shaking subassembly 5, the screening box 1 bottom is evenly distributed with the buffer spring 501, the buffer spring 501 bottom is fixedly connected with the base 502, the screening box 1 bottom is fixedly connected with the vibration motor 503. The vibration motor 503 is set in the middle position of the screening box 1 bottom, and the feeding port 3 top is fixedly connected with the feeding pipe.

[0043] The above content is analyzed: the screening box 1 is vibrated by the vibration motor 503, and the screening of raw coal is accelerated, and the feeding port 3 can be set to load raw coal and reduce dust emission. The influence of the vibration motor 503 on the screening box 1 is reduced by the buffer spring 501, and the noise is reduced.

[0044] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0045] Although the embodiments of the utility model have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sizing device for raw coal, characterized by, Include: Screening box (1), the sealing cover (2) is fixedly connected on the top of the screening box (1), the surface of the sealing cover (2) is provided with a feeding port (3), and the screening box (1) is provided with a grading screening assembly (4); The grading screening assembly (4) comprises a rotating motor (401) fixedly installed on the top of the sealing cover (2), the output shaft end of the rotating motor (401) is fixedly connected with a rotating shaft (402), the rotating shaft (402) is rotatably connected in the screening box (1), the rotating shaft (402) is uniformly distributed with screening blades (403), the screening box (1) is uniformly provided with mounting grooves (406), the mounting grooves (406) are slidably connected with sliding blocks (407), the surface of the sliding block (407) is fixedly connected with a screening box (404), the screening box (404) is provided with a plurality of groups from top to bottom, the bottom of the screening box (404) is provided with a screening hole (405), the diameter of the screening hole (405) decreases from top to bottom, and the surface of the screening box (404) is fixedly connected with a discharge port (408).

2. A raw coal sizing device as claimed in claim 1, wherein: The surface of the screening box (1) is provided with a discharge port (409), and the discharge port (409) is correspondingly arranged with the discharge port (408) from top to bottom.

3. A raw coal sizing apparatus as claimed in claim 2, wherein: The surface of the screening box (1) is threadedly connected with a locking bolt (410), and the surface of the discharge port (409) is provided with a threaded hole matched with the locking bolt (410).

4. A raw coal sizing device as claimed in claim 1, wherein: The screening blades (403) are sequentially provided with a plurality of groups from top to bottom, each group of the screening blades (403) is correspondingly arranged with the screening box (404), and the screening blades (403) are arranged in close contact with the bottom of the screening box (404).

5. A raw coal sizing apparatus as claimed in claim 4, wherein: The screening blades (403) and the screening box (404) have the same height, and the sliding block (407) is slidably connected in the mounting groove (406).

6. A raw coal sizing device as claimed in claim 1, wherein: The bottom of the screening box (1) is provided with a shaking assembly (5), the bottom of the screening box (1) is uniformly distributed with a buffer spring (501), the bottom of the buffer spring (501) is fixedly connected with a base (502), and the bottom of the screening box (1) is fixedly connected with a vibrating motor (503).

7. A raw coal sizing apparatus as claimed in claim 6, wherein: The vibrating motor (503) is arranged at the central position of the bottom of the screening box (1), and the top of the feeding port (3) is fixedly connected with a feeding pipe.

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