Coal mine wet coal separation device

Abstract

The utility model relates to the technical field of wet coal preparation technology, concretely refers to a coal mine wet coal preparation device, jig, and the jig includes fuselage and frame, and the bottom end of fuselage is equipped with a pair of vibrating screen, and the upper side between frame and vibrating screen is equipped with eccentric power assembly, and its characterized in that: one vibrating screen side fixedly connected with extension frame, the upper side of extension frame is fixed with secondary screening device, and the secondary screening device includes the screening frame fixed on the upper side of extension frame, and the inboard of screening frame is fixed with sieve plate, and the elastic support structure is equipped between extension frame and frame, the top of fuselage is close to one end and is equipped with material guiding mechanism, and the material guiding mechanism includes main material guiding plate, and the top end of fuselage is located above main material guiding plate and is fixed with conveying structure, and one end of conveying structure is equipped with secondary material guiding plate fixed with fuselage. The utility model solves the problem of the insufficient layering of fine coal of the existing jig, the easy mixing of materials, the ash content fluctuation, the low recovery rate, the simple material guiding mechanism, the uneven water flow caused by material accumulation and the poor separation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wet coal preparation technology, specifically to a wet coal preparation device for coal mines. Background Technology

[0002] The principle of jigging coal preparation is based on the density difference of materials in a vertically pulsating medium to achieve stratification and separation. After the raw coal is fed into the jigging screen to form a bed, compressed air drives the water flow to form an alternating up-and-down pulsation, causing the bed to undergo a process of loosening, stratification, and compaction. When the water flows upward, low-density clean coal floats due to buoyancy and acceleration difference, while high-density gangue sinks. The downward water flow prolongs the stratification time through suction and enhances fine particle separation. Traditional jigs are ineffective at separating fine coal particles because the fine particles do not stratify sufficiently in the pulsating water flow, and are easily mixed with clean coal or gangue, resulting in large fluctuations in the ash content of clean coal and low recovery rate. In addition, the existing jigs have simple material guiding mechanisms, mostly single guide plate structures, which make it easy for materials to accumulate on one side of the machine body, resulting in uneven water flow distribution in the jig chamber and reduced separation efficiency. Summary of the Invention

[0003] The technical problem this invention aims to solve is that existing jigs suffer from insufficient stratification of fine coal, easy mixing leading to ash content fluctuations and low recovery rates; and simple material guiding mechanisms result in uneven water flow due to material accumulation, leading to poor sorting efficiency.

[0004] To solve the above problems, the technical solution adopted by this utility model is a wet coal preparation device for coal mines, including a jig. The jig includes a body and a frame. A pair of vibrating screens are provided at the bottom of the body. An eccentric power component is provided between the upper side of the frame and the vibrating screens. An extension frame is fixedly connected to one side of one vibrating screen. A secondary screening device is fixed on the upper side of the extension frame. The secondary screening device includes a screening frame fixed on the upper side of the extension frame. A screen plate is fixed inside the screening frame. An elastic support structure is provided between the lower side of one end of the extension frame and the frame. A material guiding mechanism is provided near one end of the top of the machine body. The material guiding mechanism includes a main material plate fixed to one side of the machine body. A conveying structure is fixed above the main material plate at the top of the machine body. A secondary material guiding plate is provided at one end of the conveying structure and fixed to the machine body.

[0005] As a further embodiment of this utility model: the elastic support structure includes a limiting tube fixed to the upper side of the frame, a limiting rod fixed to the lower side of the extension frame inside the limiting tube, and a compression spring sleeved on the limiting rod and the outer side of the limiting tube to ensure the stable up and down movement of the extension frame and prevent the extension frame from shaking in other directions.

[0006] As a further embodiment of this utility model: a discharge port is provided on one side of the screening frame, and a screening outlet is provided at the bottom of the screening frame, which are used to discharge water, filtered clean coal, and fine gangue respectively.

[0007] As a further embodiment of this utility model: a discharge port is provided on one side of the machine body, and the discharge port is located above the screening frame to facilitate a second fine screening.

[0008] As a further embodiment of this utility model: a material distribution port is provided on one side of the main material plate above the secondary material plate, so as to guide the sorted large pieces of raw materials to the secondary material plate.

[0009] Compared with the prior art, the advantages of this utility model are as follows: This application adds a secondary screening structure, which is fixedly set with the vibrating screen, and can perform secondary processing on the material after the initial sorting by the vibrating screen. It can specifically intercept mismatched objects in fine particles, improve the sorting accuracy, and set a conveying structure at the main material plate. The conveying structure is at a certain height above the upper part of the main material plate to block large pieces of gangue, reduce material accumulation, and ensure smooth material conveying. Attached Figure Description

[0010] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a partial structural cross-section of a wet coal preparation device for coal mines according to the present invention. Figure 1 .

[0011] Figure 2 This is a three-dimensional view of the overall structure of a wet coal preparation device for coal mines according to the present invention.

[0012] Figure 3 This is a partial structural cross-section of a wet coal preparation device for coal mines according to the present invention. Figure 2 .

[0013] Figure 4 This is an enlarged view of section A of a wet coal preparation device for coal mines according to this utility model.

[0014] Attached Figure

[0015] 1. Machine body; 2. Machine frame; 3. Vibrating screen; 4. Eccentric power assembly; 5. Extension frame; 6. Screening frame; 7. Screen plate; 8. Main material plate; 9. Conveying structure; 10. Secondary guide plate; 11. Limiting tube; 12. Limiting rod; 13. Compression spring; 1.1. Discharge port; 6.1. Discharge outlet; 6.2. Screening outlet; 8.1. Dividing port. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0018] Combined with appendix Figure 1 , 3 4. It can be seen that the machine includes a jig, which consists of a body 1 and a frame 2. A pair of vibrating screens 3 are located at the bottom of the body 1. An eccentric power assembly 4 is located between the upper side of the frame 2 and the vibrating screens 3. A discharge port 1.1 is located on one side of the body 1, above the screening frame 6, to facilitate a second fine screening. An extension frame 5 is fixedly connected to one side of each vibrating screen 3. A secondary screening device is fixed on the upper side of the extension frame 5. The secondary screening device includes a screening frame 6 fixed to the upper side of the extension frame 5. A discharge port 6.1 is located on one side of the screening frame 6. The bottom of the screening frame 6 is provided with a screening outlet 6.2, which is used to discharge water, filtered clean coal, and fine gangue. A screen plate 7 is fixed inside the screening frame 6. An elastic support structure is provided between the lower side of one end of the extension frame 5 and the frame 2. The elastic support structure includes a limiting tube 11 fixed on the upper side of the frame 2. A limiting rod 12 is fixed inside the limiting tube 11 on the lower side of the extension frame 5. A compression spring 13 is sleeved on the outer side of the limiting rod 12 and the limiting tube 11 to ensure the stable up and down movement of the extension frame 5 and prevent the extension frame 5 from shaking in other directions. Combined with appendix Figure 1 , 2 It can be seen that a material guiding mechanism is provided near one end of the top of the machine body 1. The material guiding mechanism includes a main material plate 8 fixed to one side of the machine body 1. A conveying structure 9 is fixed above the main material plate 8 at the top of the machine body 1. A secondary material guiding plate 10 fixed to the machine body 1 is provided at one end of the conveying structure 9. A material distribution port 8.1 is opened on one side of the main material plate 8 above the secondary material guiding plate 10 to guide the sorted large pieces of raw materials to the secondary material guiding plate 10. The conveying structure 9 includes a pair of connecting plates. The connecting plates are fixed to the upper side of the machine body 1. Limiting plates are fixed on one side of the pair of connecting plates. A transmission roller is rotatably provided at both ends between the two limiting plates. A transmission belt is sleeved on the outside of the transmission roller. A motor with its output end fixed to one of the transmission rollers is fixed on the upper side of the limiting plates.

[0019] The working principle of this utility model is as follows: When the jigging machine is used for wet coal preparation, the raw material is first conveyed to the main feed plate 8 through the conveying mechanism. When the raw material passes through the main feed plate 8, the conveying structure 9 can guide the large pieces of raw material to the feed outlet 8.1 and discharge them from the secondary feed plate 10. The raw materials can then be screened by a jig. During the screening process, the vibrating screen 3 vibrates under the drive of the eccentric power component 4, and at the same time, it drives the extension frame 5 fixed thereto to vibrate synchronously. Some of the raw materials screened by the jig will be transported to the top of the screening frame 6 through the discharge port 1.1, and then undergo precise screening by a secondary screening device to improve the screening quality.

[0020] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wet coal preparation apparatus for coal mines, comprising: A jig, comprising a body (1) and a frame (2), wherein a pair of vibrating screens (3) are provided at the bottom of the body (1), and an eccentric power assembly (4) is provided between the upper side of the frame (2) and the vibrating screens (3), characterized in that: An extension frame (5) is fixedly connected to one side of a vibrating screen (3). A secondary screening device is fixed on the upper side of the extension frame (5). The secondary screening device includes a screening frame (6) fixed on the upper side of the extension frame (5). A screen plate (7) is fixed inside the screening frame (6). An elastic support structure is provided between the lower side of one end of the extension frame (5) and the frame (2). The top of the machine body (1) is provided with a material guiding mechanism near one end. The material guiding mechanism includes a main material plate (8) fixed on one side of the machine body (1). The top of the machine body (1) is fixed with a conveying structure (9) above the main material plate (8). One end of the conveying structure (9) is provided with a secondary material guiding plate (10) fixed to the machine body (1).

2. The wet coal preparation device for coal mines according to claim 1, characterized in that: The elastic support structure includes a limiting tube (11) fixed on the upper side of the frame (2), a limiting rod (12) fixed on the lower side of the extension frame (5) inside the limiting tube (11), and a compression spring (13) sleeved on the outer side of the limiting rod (12) and the limiting tube (11).

3. The wet coal preparation device for coal mines according to claim 1, characterized in that: The screening box (6) has a discharge port (6.1) on one side and a screening outlet (6.2) at the bottom.

4. A wet coal preparation device for coal mines according to claim 1, characterized in that: The machine body (1) has a discharge port (1.1) on one side, and the discharge port (1.1) is located above the screening frame (6).

5. A wet coal preparation device for coal mines according to claim 1, characterized in that: The main guide plate (8) has a material distribution port (8.1) located above the secondary guide plate (10) on one side.

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