Screening device for coal mining

Abstract

The utility model discloses a coal mining screening device, which relates to the technical field of coal mining screening, and comprises a screening machine body, a multi-layer screening frame and a screening plate, the upper side of the screening machine body is connected with a feed port, the bottom of the screening machine body is provided with a discharge port, and the outer side of the screening machine body is provided with a control box. And a plurality of layers of screening frames are arranged in the screening machine body. According to the coal mining screening device, a driving motor drives a mounting base and a knocking plate to rotate through a coupler on one side of the output end, the knocking plate can make contact with and strike a striking plate when rotating, the multiple layers of screening frames are driven to integrally oscillate in a reciprocating mode along a guide groove, and coal vibrates and falls down along the screening plate; and when the coal vibrates and falls, the coal collides with the buffer plate to be buffered and dispersed, so that the coal mining and screening device solves the problem that when too much coal is accumulated, unscreened coal directly rolls down along the inclined screen plate, and consequently the coal screening efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining and screening, and specifically relates to a coal mining and screening device. Background Technique

[0002] Coal mining refers to the process of extracting coal resources from underground or the surface. It is an important link in the utilization of coal resources. This process involves a series of complex operations. Among them, exploration is the first step in coal resource mining, providing a basis for subsequent mining work. The design stage ensures the safe and efficient mining of coal mines. The development stage includes the construction of various coal mine basic systems. Mining is the core link in coal mining. After coal mining, it is necessary to screen and classify the coal for later processing and sales.

[0003] After the existing coal mining, an inclined sieve plate is used in cooperation with a vibration motor. When the vibration motor starts, it will vibrate the whole screening machine, thus completing the screening of coal. However, when using a single sieve plate vibration screening method, when the coal accumulates too much, the un-screened coal will directly roll down along the inclined sieve plate, resulting in a reduction in the coal screening efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a coal mining and screening device to solve the problem that when the coal accumulates too much, the un-screened coal will directly roll down along the inclined sieve plate, resulting in a reduction in the coal screening efficiency proposed in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A coal mining and screening device, including a screening machine body, multiple layers of screening frames and screening plates.

[0006] An inlet is connected to the upper side of the screening machine body, an outlet is opened at the bottom of the screening machine body, a control box is installed on the outside of the screening machine body, multiple layers of screening frames are arranged inside the screening machine body, and screening plates are installed inside the multiple layers of screening frames.

[0007] Preferably, a guiding layer is connected to the bottom of the screening plate, a collection cavity is opened inside the multiple layers of screening frames, and the guiding layer is inclined.

[0008] Preferably, an installation groove is opened inside the multiple layers of screening frames, one end of a buffer plate is hinged to the inside of the installation groove through a pin shaft, one side of the buffer plate close to the installation groove is hinged to one end of a tension spring, and the other end of the tension spring is hinged to the installation groove.

[0009] Preferably, striking plates are symmetrically welded on both sides of the multiple layers of screening frames, a guiding groove is opened inside the screening machine body, and both sides of the multiple layers of screening frames are slidably connected to the guiding groove through the striking plates.

[0010] Preferably, a knocking plate is provided at the bottom of the striking plate. One side of the knocking plate is connected to the mounting seat. Driving motors are installed on both sides of the screening machine body through locking bolts, and the output end of the driving motor is connected to the adjacent mounting seat through a coupling.

[0011] Preferably, buffer springs are symmetrically installed inside the guiding groove. One side of the buffer spring is elastically connected to an abutting block, and one side of the abutting block abuts against the striking plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: In this coal mining screening device, the driving motor drives the mounting seat and the knocking plate to rotate through the coupling on one side of the output end. When the knocking plate rotates, it will contact and strike the striking plate, driving the entire multi-layer screening frame to reciprocate along the guiding groove, causing the coal to vibrate and fall along the screening plate. When the coal vibrates and falls, it impacts the buffer plate for buffering and dispersion, solving the problem that when the coal accumulates too much, the un-screened coal will directly roll down along the inclined screen plate, resulting in a reduction in the coal screening efficiency.

[0013] 1. In this coal mining screening device, to prevent the coal from accumulating and falling, after the coal falls into the multi-layer screening frame from the feed inlet, it will be screened layer by layer along the screening plate inside the multi-layer screening frame. During the process of the coal falling along the screening plate, the coal will impact the buffer plate on one side of the screening plate and squeeze the buffer plate and the tension spring on one side of the buffer plate towards the side where the installation groove is located. At this time, the buffer plate and the tension spring will buffer and disperse the falling of the coal, facilitating the next contact and screening of the coal with the screening plate. This coal mining screening device is provided with multiple screening plates, and buffer plates are arranged between adjacent screening plates, effectively preventing the coal from accumulating and falling and improving the coal screening effect;

[0014] 2. In this coal mining screening device, to facilitate the long-term use of the screening machine body, the driving motor is controlled through the control box. The driving motor drives the mounting seat and the knocking plate to rotate through the coupling on one side of the output end. When the knocking plate rotates, it will contact and strike the striking plate, driving the entire multi-layer screening frame to reciprocate along the guiding groove, thereby realizing the screening of the coal by the multi-layer screening plate. When the multi-layer screening frame reciprocates, the buffer springs and the abutting blocks inside the guiding groove will provide a buffering effect for the movement of the multi-layer screening frame, reducing the impact of the multi-layer screening frame on the screening machine body. This coal mining screening device screens the coal in a buffered oscillation manner, which is beneficial to the long-term use of the screening machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic cross-sectional view of the main view of the screening machine body of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional view of the side view of the multi-layer screening frame of the present utility model;

[0017] Figure 3 This is a schematic side view structure diagram of the screening machine body of the present utility model;

[0018] Figure 4 This is a schematic front view structure diagram of the multi-layer screening frame of the present utility model.

[0019] In the figure: 1. Screening machine body; 101. Feed inlet; 102. Discharge outlet; 103. Control box; 2. Multi-layer screening frame; 201. Screening plate; 202. Guide layer; 3. Installation groove; 301. Buffer plate; 302. Tension spring; 4. Collection cavity; 5. Striking plate; 501. Guide groove; 6. Knocking plate; 601. Mounting seat; 602. Driving motor; 7. Abutting block; 701. Buffer spring. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figure 1 and Figure 2 The present utility model provides a technical solution: a coal mine mining screening device, including a screening machine body 1, a multi-layer screening frame 2 and a screening plate 201,

[0022] The upper side of the screening machine body 1 is connected with a feed inlet 101, the bottom of the screening machine body 1 is provided with a discharge outlet 102, the outside of the screening machine body 1 is installed with a control box 103, the inside of the screening machine body 1 is provided with a multi-layer screening frame 2, the inside of the multi-layer screening frame 2 is installed with a screening plate 201, the bottom of the screening plate 201 is connected with a guide layer 202, the inside of the multi-layer screening frame 2 is provided with a collection cavity 4, the guide layer 202 is inclined, the inside of the multi-layer screening frame 2 is provided with an installation groove 3, one end of the buffer plate 301 is hinged to the inside of the installation groove 3 through a pin shaft, one side of the buffer plate 301 close to the installation groove 3 is hinged to one end of the tension spring 302, and the other end of the tension spring 302 is hinged to the installation groove 3.

[0023] During specific implementation, to prevent coal from piling up and falling, when coal falls into the interior of the multi-layer screening frame 2 from the feed inlet 101, it will be screened layer by layer along the screening plate 201 inside the multi-layer screening frame 2. During the process of the coal falling along the screening plate 201, the coal will impact the buffer plate 301 on one side of the screening plate 201 and squeeze the buffer plate 301 and the tension spring 302 on one side of the buffer plate 301 towards the side where the installation groove 3 is located. At this time, the buffer plate 301 and the tension spring 302 will buffer and disperse the falling of the coal, facilitating the next contact and screening of the coal with the screening plate 201;

[0024] At the same time, the small pieces of coal screened by the screening plate 201 will enter the interior of the collection chamber 4 along the guiding layer 202 obliquely arranged at the bottom of the screening plate 201 and be discharged from the discharge port 102 along the collection chamber 4, improving the efficiency of coal screening. This coal mining and screening device is provided with multiple screening plates 201, and buffer plates 301 are arranged between adjacent screening plates 201, effectively preventing coal from piling up and falling and improving the coal screening effect.

[0025] Refer to Figure 3 and Figure 4 It can be known that striking plates 5 are symmetrically welded on both sides of the multi-layer screening frame 2. A guiding groove 501 is formed inside the screening machine body 1. Both sides of the multi-layer screening frame 2 are slidably connected to the guiding groove 501 through the striking plates 5. A striking plate 6 is arranged at the bottom of the striking plate 5. One side of the striking plate 6 is connected to the mounting seat 601. Driving motors 602 are installed on both sides of the screening machine body 1 through locking bolts. The output end of the driving motor 602 is connected to the adjacent mounting seat 601 through a coupling. Buffer springs 701 are symmetrically installed inside the guiding groove 501. One side of the buffer spring 701 is elastically connected to an abutting block 7. One side of the abutting block 7 abuts against the striking plate 5.

[0026] During specific implementation, to facilitate the long-term use of the screening machine body 1, the driving motor 602 is controlled through the control box 103. The driving motor 602 drives the mounting seat 601 and the striking plates 6 equidistantly installed outside the mounting seat 601 to rotate through the coupling on one side of the output end. When the striking plates 6 rotate, they will contact and strike the striking plates 5 on the outside of the multi-layer screening frame 2, driving the entire multi-layer screening frame 2 to oscillate reciprocally along the guiding groove 501, thereby realizing the screening of coal by the multi-layer screening plates 201. When the multi-layer screening frame 2 oscillates reciprocally, the buffer springs 701 and the abutting blocks 7 inside the guiding groove 501 will provide a buffering effect for the movement of the multi-layer screening frame 2, reducing the impact of the multi-layer screening frame 2 on the screening machine body 1. This coal mining and screening device screens coal in a buffered oscillation manner, which is beneficial to the long-term use of the screening machine body 1.

[0027] In summary, when using this coal mining and screening device, coal falls into the multi-layer screening frame 2 from the feed inlet 101. The driving motor 602 is controlled through the control box 103 to drive the knocking plate 6 to rotate and contact the striking plate 5 for striking, driving the entire multi-layer screening frame 2 to reciprocate along the guiding groove 501, so that the coal vibrates and falls along the screening plate 201. When the coal vibrates and falls, it impacts with the buffer plate 301 for buffering and dispersion. The small pieces of coal screened by the screening plate 201 will enter the collection chamber 4 along the guiding layer 202 obliquely arranged at the bottom of the screening plate 201 and be discharged from the discharge port 102 along the collection chamber 4. The large pieces of coal can be discharged from the discharge port 102 at the bottom of the screening plate 201. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A coal mining screening device, comprising a screening machine body (1), a multi-layer screening frame (2) and a screening plate (201), characterized in that: A feed inlet (101) is connected to the upper side of the screening machine body (1), a discharge outlet (102) is opened at the bottom of the screening machine body (1), a control box (103) is installed on the outer side of the screening machine body (1), a multi-layer screening frame (2) is arranged inside the screening machine body (1), a screening plate (201) is installed inside the multi-layer screening frame (2), striking plates (5) are symmetrically welded on both sides of the multi-layer screening frame (2), a guide groove (501) is opened inside the screening machine body (1), both sides of the multi-layer screening frame (2) are slidably connected to the guide groove (501) through the striking plates (5), a knocking plate (6) is arranged at the bottom of the striking plate (5), one side of the knocking plate (6) is connected to a mounting seat (601), driving motors (602) are installed on both sides of the screening machine body (1) through locking bolts, the output end of the driving motor (602) is connected to the adjacent mounting seat (601) through a coupling, buffer springs (701) are symmetrically installed inside the guide groove (501), one side of the buffer spring (701) is elastically connected to an abutting block (7), and one side of the abutting block (7) abuts against the striking plate (5).

2. The coal mining and screening device according to claim 1, wherein: A guide layer (202) is connected to the bottom of the screening plate (201), a collection cavity (4) is opened inside the multi-layer screening frame (2), and the guide layer (202) is inclined.

3. A coal mining screening device according to claim 2, characterized in that: An installation groove (3) is opened inside the multi-layer screening frame (2), one end of a buffer plate (301) is hinged to the installation groove (3) through a pin shaft, one side of the buffer plate (301) close to the installation groove (3) is hinged to one end of a tension spring (302), and the other end of the tension spring (302) is hinged to the installation groove (3).

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