Crushing and screening device for coal dressing processing

Abstract

The utility model discloses a crushing and screening device for coal dressing processing, and relates to the technical field of coal processing. The device comprises a crushing assembly, a screening assembly and a re-picking assembly, the crushing assembly comprises a crushing machine shell and a slapping rotating shaft cylinder, and the re-picking assembly comprises a re-picking conveying piece, a conveying belt shell and a feeding groove. The slapping plate of the crushing assembly rotates to slap and crush raw coal, the crushed raw coal falls onto the lump coal roller screen shaft, and coal briquettes meeting the size requirement fall onto the pulverized coal spiral screening structure below through a roller screen of the lump coal roller screen shaft for dynamic screening of pulverized coal and lump coal. Raw coal briquettes which are not completely crushed and are too large in size are conveyed to the discharging opening through the re-picking assembly and are re-put into the crushing assembly to be crushed, lump coal and slack coal are output through the lump coal conveying belt and the slack coal conveying belt correspondingly, and the problems that in the existing re-crushing process of the incompletely-crushed coal briquettes, efficiency is low, and the crushing efficiency is high are solved. And blockage is easily caused in the screening process of the grate bars.

Description

Technical Field

[0001] This utility model belongs to the field of coal processing technology, and in particular relates to a crushing and screening device for coal preparation. Background Technology

[0002] With the rapid development of the modern economy, in order to make more scientific and rational use of the limited coal resources, large-scale raw coal washing and processing has become an indispensable choice. Before processing, coal washing and crushing equipment is needed to crush coal gangue into coal blocks of different sizes. Then, the coal blocks and fine coal are screened to screen out coal gangue that meets the requirements for subsequent processing.

[0003] Chinese patent CN202028430U discloses an integrated crushing and screening device. It employs a screening device located below the first-stage crushing unit. Multiple screen rollers rotate in the same direction driven by a rotating device, forcibly conveying and screening the material while also providing a certain degree of crushing effect, thus preventing clogging. The screen rollers are equipped with screen teeth, and the gap between any two teeth forms screen holes. This allows materials meeting the particle size requirements to pass through the screen holes, ensuring smoother material flow on the screen surface and successful passage through the screen holes. The first-stage crushing chamber pre-crushes the material, ensuring a more uniform material flow and eliminating large pieces during subsequent operation, while also providing good material distribution. However, this design has drawbacks: if the raw coal is not crushed to the required size by the ring hammer, oversized raw coal needs to be manually reinserted into the device for crushing, resulting in low operational efficiency. Furthermore, the raw coal is prone to clogging on the screen bars due to pushing and obstruction.

[0004] To address these issues, we provide a crushing and screening device for coal preparation. Utility Model Content

[0005] The purpose of this invention is to provide a crushing and screening device for coal preparation. The device uses a rotating impact plate in the crushing component to crush raw coal. The crushed coal falls onto a lump coal roller screen shaft. The roller screen then passes coal lumps that meet size requirements onto a lower spiral screening structure for dynamic screening of lump coal and lumps. Incompletely crushed or excessively large coal lumps are conveyed through a re-sorting component to the discharge port and reintroduced into the crushing component for further crushing. Lump coal and lump coal conveyors respectively output the lump coal and lump coal. This invention solves the problems of low efficiency in the existing process of re-crushing incompletely crushed coal lumps and easy clogging during the screening process.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a crushing and screening device for coal preparation, including a crushing component, a screening component and a re-screening component. The crushing component includes a crusher shell and a striking shaft cylinder. The outer side of the striking shaft cylinder is circumferentially arrayed with striking plates. The striking shaft cylinder is fixedly sleeved on the striking shaft. The striking shaft is rotatably installed inside the crusher shell. One end of the striking shaft is connected to the output shaft of the motor through a belt. A discharge port is opened on the top surface of the crusher shell on one side above the striking shaft.

[0008] The screening assembly includes a conveyor side plate, a set of lump coal roller screen shafts, a lump coal conveyor belt, a set of fine coal spiral screening structure and a fine coal conveyor belt;

[0009] A set of lump coal roller screen shafts are horizontally arrayed and rotated between the conveyor side plates. The re-sorting assembly is fixedly installed at the output end of the lump coal roller screen shaft group. The lump coal conveyor belt is installed below the output end of the pulverized coal spiral screening structure. The transmission direction of the lump coal conveyor belt is perpendicular to the conveying direction of the pulverized coal spiral screening structure. The two ends of the lump coal roller screen shaft group are connected in a staggered manner by belts.

[0010] The coal slurry conveyor belt is installed between the conveyor side plates below the coal slurry spiral screening structure.

[0011] The present invention is further configured such that a set of coal slurry screening structures includes a set of auger screws and a set of screen cylinders. The screen cylinders are semi-cylindrical in shape with one end open and the other end closed. The semi-cylindrical body of the screen cylinders is provided with coal slurry mesh. The set of screen cylinders are arranged and fixed below the lump coal roller screen shaft along the axial direction of the lump coal roller screen shaft. The open end of the screen cylinder faces the output direction of the lump coal roller screen shaft assembly. One end of the auger screw is rotatably sleeved on the closed end of the screen cylinder. The two ends of the set of auger screws are connected to each other in a staggered manner by belts. One end of the auger screw in the auger screw assembly that is close to the conveyor side plate is connected to the output shaft of the motor by belt.

[0012] The present invention is further configured such that a crushing impact plate is fixedly installed on the side of the crusher shell facing the impact plate, and a vertical wave plate is fixedly installed on the side of the crushing impact plate facing the impact plate.

[0013] The present invention is further configured such that the re-sorting component includes a re-sorting conveyor, a conveyor belt housing and a feeding trough. The re-sorting conveyor includes a re-sorting conveyor belt and two conveyor belt shafts. The two ends of the re-sorting conveyor belt are sleeved on the outer side of the conveyor belt shaft. The two conveyor belt shafts are rotatably installed inside the conveyor belt housing. The outer surface of the re-sorting conveyor belt is fixedly provided with inclined baffles perpendicular to the conveyor belt housing.

[0014] The present invention is further configured such that the outer shell of the conveyor belt is vertically fixed at the output end of the coal sluice screen shaft on the conveyor side plate, and one end of the re-sorting conveyor belt is at a horizontal height lower than the coal sluice screen shaft.

[0015] The present invention is further configured such that an inclined plate with an inclined surface facing the re-sorting conveyor belt is fixed between the conveyor side plates at the output end of the lump coal tumbler screen shaft, and the inclined baffle on the side of the re-sorting conveyor belt near the lump coal tumbler screen shaft contacts the inclined plate.

[0016] The present invention is further configured such that an opening is provided on the upper part of the conveyor belt shell on the side of the inclined baffle bar facing downwards, the inlet end of the feeding trough is connected to the opening, and the outlet end of the feeding trough is above the discharge port.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model uses the rotating impact plate of the crushing component to crush raw coal. The crushed raw coal falls onto the screening component, which then screens the crushed raw coal. The raw coal blocks that are not fully crushed and are too large are conveyed to the discharge port by the re-sorting component and put back into the crushing component for crushing. This solves the problem of low efficiency in the process of re-crushing incompletely crushed coal blocks.

[0019] 2. This utility model uses the rotating impact plate of the crushing component to crush the raw coal. The crushed raw coal falls onto the lump coal roller screen shaft. After passing through the roller screen shaft, the coal blocks that meet the size requirements fall onto the lower fine coal spiral screening structure for dynamic screening of fine coal and lump coal. The lump coal conveyor belt and the fine coal conveyor belt output the lump coal and fine coal respectively, which solves the problem of easy clogging during the screening process of the screen bar.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a crushing and screening device used in coal preparation.

[0023] Figure 2 This is a side sectional view of the present invention.

[0024] Figure 3 This is a schematic diagram of the screening component.

[0025] Figure 4 This is another structural schematic diagram of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the re-collection and conveying component.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1-Crushing assembly, 101-Crusher housing, 101a-Discharge port, 101b-Crushing impact plate, 101b-1-Wave plate, 102-Impacting shaft cylinder, 102a-Impacting plate, 102b-Impacting shaft, 2-Screwing assembly, 201-Conveyor side plate, 201a-Inclined plate, 202-Lump coal roller screen shaft, 203-Lump coal conveyor belt, 204-Pulverized coal spiral screening structure, 204a-Auger screw, 204b-Screw cylinder, 205-Pulverized coal conveyor belt, 3-Re-sorting assembly, 301-Re-sorting conveyor, 301a-Re-sorting conveyor belt, 301a-1-Inclined baffle, 302-Conveyor belt housing, 302a-Passage, 303-Feeding chute. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] Please see Figures 1 to 4 This utility model is a crushing and screening device for coal preparation, including a crushing component 1, a screening component 2, and a re-screening component 3. The crushing component 1 includes a crusher shell 101 and a striking shaft cylinder 102. The raw coal is crushed by the rotating striking plate 102a of the crushing component 2. The crushed raw coal falls onto the lump coal roller screen shaft 202. After passing through the roller screen of the lump coal roller screen shaft 202, the coal blocks that meet the size requirements fall onto the fine coal spiral screening structure 204 below for dynamic screening of fine coal and lump coal. The lump coal conveyor belt 203 and the fine coal conveyor belt 205 respectively output the lump coal and fine coal, which solves the problem of easy clogging during the screening process of the screen bar.

[0032] Specifically, the striking shaft cylinder 102 is fixedly sleeved on the striking shaft 102b, the striking shaft 102b is rotatably installed inside the crusher housing 101, one end of the striking shaft 102b is connected to the output shaft of the motor via a belt, and a discharge port 101a is provided on the top surface of the crusher housing 101 on one side above the striking shaft 102b.

[0033] Screening assembly 2 includes a conveyor side plate 201, a set of lump coal roller screen shafts 202, a lump coal conveyor belt 203, a set of fine coal spiral screening structure 204 and a fine coal conveyor belt 205;

[0034] A set of lump coal roller screen shafts 202 are horizontally arrayed and rotatably installed between the conveyor side plates 201. The re-sorting assembly 3 is fixedly installed at the output end of the lump coal roller screen shaft 202 set. The lump coal conveyor belt 203 is installed below the output end of the pulverized coal spiral screening structure 204. The transmission direction of the lump coal conveyor belt 203 is perpendicular to the conveying direction of the pulverized coal spiral screening structure 204. The two ends of the lump coal roller screen shaft 202 set are sequentially and alternately connected by belts.

[0035] The coal pulverizer conveyor belt 205 is installed between the conveyor side plates 201 below the coal pulverizer spiral screening structure 204.

[0036] Furthermore, a set of pulverized coal spiral screening structures 204 includes a set of auger screws 204a and a set of screen cylinders 204b. The screen cylinder 204b is a semi-cylindrical shape with one end open and the other end closed. The semi-cylindrical body of the screen cylinder 204b is provided with pulverized coal mesh. The set of screen cylinders 204b is arranged and fixed below the lump coal roller screen shaft 202 along the axial direction. The open end of the screen cylinder 204b faces the output direction of the lump coal roller screen shaft 202 set. One end of the auger screw 204a is rotatably sleeved on the closed end of the screen cylinder 204b. The two ends of the set of auger screws 204a are connected to each other in a staggered manner by belts. One end of the auger screw 204a in the set of auger screws 204a closest to the conveyor side plate 201 is connected to the output shaft of the motor by belt.

[0037] Furthermore, a crushing impact plate 101b is fixedly installed on the side of the discharge port 101a of the crusher shell 101 facing the impact plate 102a, and a vertical wave plate 101b-1 is fixed on the side of the crushing impact plate 101b facing the impact plate 102a.

[0038] The operation process in this embodiment is as follows:

[0039] The equipment is turned on, and raw coal is fed into the crushing assembly 1 through the discharge port 101a. The impact plate 102a strikes the raw coal against the crushing impact plate 101b. The corrugated plate 101b-1 of the crushing impact plate 101b concentrates the impact force on the raw coal, making it easier to crush. The crushed raw coal falls onto the lump coal roller screen shaft 202. The rolling screening of the lump coal roller screen shaft 202 screens out lump coal of the correct size and sends it to the pulverized coal spiral screening structure 204 below. The rotation of the auger screw 204a of the pulverized coal spiral screening structure 204 pushes the lump coal forward on the screen 204b, thus performing dynamic screening of the pulverized coal. The lump coal conveyor belt 203 and the pulverized coal conveyor belt 205 output the lump coal and pulverized coal respectively.

[0040] Example 2

[0041] Please see Figures 1 to 5Based on Embodiment 1, the re-sorting component 3 includes a re-sorting conveyor 301, a conveyor belt housing 302, and a feeding trough 303. The re-sorting conveyor 301 includes a re-sorting conveyor belt 301a and two conveyor belt shafts 301b.

[0042] Specifically, the two ends of the re-sorting conveyor belt 301a are sleeved on the outer side of the conveyor belt shaft 301b, and the two conveyor belt shafts 301b are rotatably installed inside the conveyor belt housing 302. The outer surface of the re-sorting conveyor belt 301a is fixed with an array of inclined baffles 301a-1 perpendicular to the conveyor belt housing 302.

[0043] Furthermore, the conveyor belt housing 302 is vertically fixed at the output end of the lump coal slub screen shaft 202 of the conveyor side plate 201, and one end of the re-sorting conveyor belt 301a is at a horizontal height lower than the lump coal slub screen shaft 202.

[0044] Furthermore, between the conveyor side plates 201, at the output end of the lump coal tumbler screen shaft 202, there is an inclined plate 201a with an inclined surface facing the re-sorting conveyor belt 301a, and the inclined baffle 301a-1 on the side of the re-sorting conveyor belt 301a near the lump coal tumbler screen shaft 202 is in contact with the inclined plate 201a.

[0045] Furthermore, an opening 302a is provided on the side of the inclined baffle 301a-1 above the conveyor belt housing 302, the inlet end of the feeding trough 303 is connected to the opening 302a, and the outlet end of the feeding trough 303 is above the discharge port 101a.

[0046] The operation process in this embodiment is as follows:

[0047] Oversized raw coal lumps are conveyed to the inclined baffle 301a-1 of the re-sorting component 3 by the rotation of the lump coal roller screen shaft 202. The re-sorting conveyor belt 301a then conveys the raw coal upwards until the inclined baffle 301a-1 aligns with the opening 302a on one side of the conveyor belt housing 302, causing the raw coal lumps to slide into the feeding trough 303. The raw coal lumps are then guided by the feeding trough 303 to slide towards the discharge port 101a and fall into the crushing component 1 for re-crushing.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A crushing and screening device for coal preparation, comprising a crushing component (1), a screening component (2), and a re-screening component (3), characterized in that: The crushing assembly (1) includes a crusher housing (101) and a striking shaft cylinder (102). The striking shaft cylinder (102) has striking plates (102a) fixedly arranged in a circumferential array on its outer side. The striking shaft cylinder (102) is fixedly sleeved on the striking shaft (102b). The striking shaft (102b) is rotatably installed inside the crusher housing (101). One end of the striking shaft (102b) is connected to the output shaft of the motor via a belt. A discharge port (101a) is provided on the top surface of the crusher housing (101) on one side above the striking shaft (102b). The screening assembly (2) includes a conveyor side plate (201), a set of lump coal roller screen shafts (202), a lump coal conveyor belt (203), a set of fine coal spiral screening structure (204) and a fine coal conveyor belt (205); A set of the lump coal roller screen shafts (202) are horizontally arrayed and rotatably installed between the conveying side plates (201). The re-sorting assembly (3) is fixedly installed at the output end of the lump coal roller screen shaft (202) set. The lump coal conveyor belt (203) is installed below the output end of the pulverized coal spiral screening structure (204). The transmission direction of the lump coal conveyor belt (203) is perpendicular to the conveying direction of the pulverized coal spiral screening structure (204). The coal slurry conveyor belt (205) is installed between the conveyor side plates (201) below the coal slurry spiral screening structure (204).

2. The crushing and screening device for coal preparation according to claim 1, characterized in that: A set of the aforementioned coal slurry screening structure (204) includes a set of auger screws (204a) and a set of screen cylinders (204b). The screen cylinder (204b) is a semi-cylindrical shape with one end open and the other end closed. The semi-cylindrical body of the screen cylinder (204b) is provided with coal slurry mesh. The set of screen cylinders (204b) is arranged and fixed below the lump coal roller screen shaft (202) along the axial direction. The open end of the screen cylinder (204b) faces the output direction of the lump coal roller screen shaft (202) set. One end of the auger screw (204a) is rotatably sleeved on the closed end of the screen cylinder (204b). The two ends of the set of auger screws (204a) are sequentially and alternately connected to each other by belts. One end of the auger screw (204a) in the auger screw (204a) set that is close to the conveyor side plate (201) is connected to the output shaft of the motor by belt.

3. The crushing and screening device for coal preparation according to claim 2, characterized in that: A crushing impact plate (101b) is fixedly installed on the side of the crusher shell (101) facing the impact plate (102a) at the discharge port (101a). A vertical wave plate (101b-1) is fixed on the side of the crushing impact plate (101b) facing the impact plate (102a).

4. The crushing and screening device for coal preparation according to claim 1, characterized in that: The re-sorting assembly (3) includes a re-sorting conveyor (301), a conveyor belt housing (302), and a feeding trough (303). The re-sorting conveyor (301) includes a re-sorting conveyor belt (301a) and two conveyor belt shafts (301b). The two ends of the re-sorting conveyor belt (301a) are sleeved on the outer side of the conveyor belt shafts (301b). The two conveyor belt shafts (301b) are rotatably installed inside the conveyor belt housing (302). The outer surface of the re-sorting conveyor belt (301a) is fixed with an array of inclined baffles (301a-1) perpendicular to the conveyor belt housing (302).

5. The crushing and screening device for coal preparation according to claim 4, characterized in that: The conveyor belt housing (302) is vertically fixed at the output end of the lump coal slub screen shaft (202) of the conveyor side plate (201), and one end of the re-sorting conveyor belt (301a) is horizontally lower than the lump coal slub screen shaft (202).

6. The crushing and screening device for coal preparation according to claim 5, characterized in that: An inclined plate (201a) with an inclined surface facing the re-sorting conveyor belt (301a) is fixed between the conveyor side plates (201) at the output end of the lump coal tumbler screen shaft (202). The inclined baffle (301a-1) on the side of the re-sorting conveyor belt (301a) near the lump coal tumbler screen shaft (202) is in contact with the inclined plate (201a).

7. A crushing and screening device for coal preparation according to claim 6, characterized in that: The conveyor belt housing (302) has an opening (302a) on the side of the inclined baffle (301a-1) that is tilted downwards. The inlet end of the feeding trough (303) is connected to the opening (302a), and the outlet end of the feeding trough (303) is above the discharge port (101a).

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