Coal mine crushing and screening device

Abstract

The utility model discloses a coal mine crushing and screening device, and relates to the technical field of coal mines. Comprising a box body, a feeding opening is fixedly formed in the upper end of the box body, a discharging opening is fixedly formed in the lower end of the box body, a first motor is fixedly installed on one side of the box body, a screening mechanism is arranged in the box body and located above the discharging opening, the screening mechanism comprises a positioning frame fixedly installed in the box body, and a driving roller is movably installed in the positioning frame; a screen belt is arranged between the driving rollers, a second motor is fixedly installed on the side wall of the positioning frame, and a cleaning mechanism is arranged on the side wall of the box body. According to the coal mine crushing and screening device, the screening mechanism can screen crushed mineral aggregates, and the third motor on the cleaning mechanism can drive the cleaning brush to rotate close to the surface of the screen mesh belt to scrub the screen mesh belt, so that the mineral aggregates clamped in meshes of the screen mesh belt are cleaned up, and blocking accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mines, in particular to a coal mine crushing and screening device. Background Art

[0002] In the process of coal mine exploitation and utilization, coal mine crushing is an important link. Through crushing, the large coal blocks mined are refined, which is convenient for the transportation and utilization of coal mines. After the coal mine crushing process, it is often necessary to screen the crushed coal mines to screen out coal blocks of appropriate sizes that meet the requirements of crushing and subsequent utilization. During screening, the ore often gets stuck in the mesh holes of the screen, causing blockage, and thus reducing the screening efficiency of the ore.

[0003] Publication No. CN211660100U discloses a coal mine crushing and screening device for coal mine exploitation, including a box body. An inlet is provided at the upper end of the box body. A leakage hopper is fixedly connected inside the box body and is located below the inlet. Two crushing mechanisms are symmetrically arranged below the leakage hopper. An aggregate hopper is arranged below the two crushing mechanisms. A screening mechanism is arranged below the aggregate hopper. A linkage mechanism for linking the crushing mechanism and the screening mechanism is provided on the side wall of the box body. An anti-blocking mechanism is arranged below the screening mechanism. A discharge port is provided at the lower end of the box body.

[0004] The ejector rod in the above device can be inserted into the mesh holes of the screen to push up the ore stuck in the mesh holes, thereby avoiding blockage caused by the ore getting stuck in the mesh holes of the screen. However, during actual use, the box body vibrates, causing the screen to shift, and it cannot be guaranteed that the ejector rod can be aligned with the mesh holes of the screen every time. During the upward movement of the ejector rod, the screen may be damaged. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a coal mine crushing and screening device, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A coal mine crushing and screening device, comprising a box body, with a feed inlet fixedly installed at the upper end of the box body, a discharge outlet fixedly installed at the lower end of the box body, a first motor fixedly installed on one side of the box body, support feet fixedly installed at the four corner positions of the bottom of the box body. Inside the box body, a screening mechanism is provided above the discharge outlet. The screening mechanism includes a positioning frame fixedly installed inside the box body, a driving roller movably installed inside the positioning frame, a screen belt arranged between the driving rollers, a second motor fixedly installed on the side wall of the positioning frame, and a cleaning mechanism arranged on the side wall of the box body. The cleaning mechanism includes a protective housing fixed on the side wall of the box body, a cleaning brush movably installed inside the protective housing, a third motor fixedly installed at the front end of the protective housing, and a flushing nozzle arranged inside the protective housing, and the flushing nozzle can spray high-pressure water flow.

[0008] Furthermore, the screening mechanism further includes an access notch opened on the side wall of the box body and an aggregate hopper fixed above the screen belt. A support plate is fixedly installed at the bottom of the positioning frame, and the support plate can support the positioning frame.

[0009] Furthermore, a clamping groove is opened on the inner wall of the box body, and the aggregate hopper is fixed inside the box body through the clamping groove.

[0010] Furthermore, bearings are arranged at both ends of the driving roller, the driving roller is movably installed on the positioning frame through the bearings, the screen belt is movably installed inside the positioning frame through the driving roller, the screen belt extends out of the box body through the access notch, a coupling is arranged at the output end of the second motor, and one end of the driving roller is fixedly installed on the output end of the second motor through the coupling, and the second motor drives the driving roller to rotate.

[0011] Furthermore, the cleaning mechanism further includes an installation hole opened at the upper end of the protective housing and a driving shaft fixed on the cleaning brush. A conveying water pipe is connected to the flushing nozzle.

[0012] Furthermore, bearings are arranged at both ends of the driving shaft, the driving shaft is movably installed on the protective housing through the bearings, and the driving shaft drives the cleaning brush to rotate.

[0013] Furthermore, a coupling is arranged at the output end of the third motor, one end of the driving shaft is fixedly installed on the output end of the third motor through the coupling, and the flushing nozzle is installed inside the protective housing through the installation hole, and the flushing nozzle is obliquely oriented towards the screen belt.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] The coal ore collected by the aggregate hopper will fall onto the screen belt, so as to screen the crushed coal ore. Once the mesh holes on the screen belt are blocked during the screening process, the second motor can be started. After starting the second motor, it will drive the driving roller to rotate. After the driving roller rotates, it will drive the screen belt to move, so that the unblocked part of the screen belt moves under the aggregate hopper for screening, ensuring the screening efficiency.

[0016] When the screen belt moves, it will enter the protective housing. After the screen belt enters the protective housing, the flushing nozzle can be controlled to spray water to wash the screen belt. During the flushing process of the screen belt, the third motor can be started. After starting the third motor, it will drive the cleaning brush to rotate along the surface of the screen belt to brush the screen belt, clean the ore stuck in the mesh holes of the screen belt, avoid blockage accidents, and cause little damage to the screen belt during the cleaning process. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the basic structure of the present utility model;

[0019] Figure 3 It is a schematic diagram of the screening mechanism of the present utility model;

[0020] Figure 4 It is a schematic diagram of the cleaning mechanism of the present utility model.

[0021] In the figure: 1, feed inlet; 2, box body; 3, first motor; 4, discharge port; 5, support feet; 6, screening mechanism; 601, inlet and outlet notch; 602, screen belt; 603, driving roller; 604, support plate; 605, second motor; 606, positioning frame; 607, aggregate hopper; 7, cleaning mechanism; 701, protective housing; 702, cleaning brush; 703, driving shaft; 704, mounting hole; 705, flushing nozzle; 706, conveying water pipe; 707, third motor. Detailed Embodiment

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Such as Figure 1 Figure 2As shown in the figure, a coal mine crushing and screening device includes a box body 2. At the upper end of the box body 2, a feeding port 1 is fixedly installed. At the lower end of the box body 2, a discharging port 4 is fixedly installed. On one side of the box body 2, a first motor 3 is fixedly installed. At the four corner positions of the bottom of the box body 2, supporting feet 5 are fixedly installed. Inside the box body 2, above the discharging port 4, a screening mechanism 6 is provided. The screening mechanism 6 includes a positioning frame 606 fixedly installed inside the box body 2. Inside the positioning frame 606, driving rollers 603 are movably installed. Between the driving rollers 603, a screen belt 602 is provided. On the side wall of the positioning frame 606, a second motor 605 is fixedly installed. On the side wall of the box body 2, a cleaning mechanism 7 is provided. During use, the screening mechanism 6 can screen the crushed ore. During the screening process, the third motor 707 on the cleaning mechanism 7 will drive the cleaning brush 702 to rotate along the surface of the screen belt 602, brush the screen belt 602, and clean the ore stuck in the mesh holes of the screen belt 602 to avoid blockage accidents.

[0024] As Figure 3 shown, the screening mechanism 6 includes a positioning frame 606 fixedly installed inside the box body 2. Inside the positioning frame 606, driving rollers 603 are movably installed. Between the driving rollers 603, a screen belt 602 is provided. On the side wall of the positioning frame 606, a second motor 605 is fixedly installed. The screening mechanism 6 further includes an inlet and outlet notch 601 opened on the side wall of the box body 2 and a collecting hopper 607 fixed above the screen belt 602. At the bottom of the positioning frame 606, a support plate 604 is fixedly installed.

[0025] Specifically, the crushed coal ore will be collected by the collecting hopper 607. The coal ore collected by the collecting hopper 607 will fall onto the screen belt 602, so as to screen the crushed coal ore. During the screening process, once the mesh holes on the screen belt 602 are blocked, the second motor 605 can be started. After starting the second motor 605, it will drive the driving rollers 603 to rotate. After the driving rollers 603 rotate, they will drive the screen belt 602 to move, so that the unblocked part of the screen belt 602 moves under the collecting hopper 607 for screening, ensuring the screening efficiency.

[0026] As Figure 4 shown, the cleaning mechanism 7 includes a protective housing 701 fixed on the side wall of the box body 2. Inside the protective housing 701, a cleaning brush 702 is movably installed. At the front end of the protective housing 701, a third motor 707 is fixedly installed. Inside the protective housing 701, a flushing nozzle 705 is provided. The cleaning mechanism 7 further includes an installation hole 704 opened at the upper end of the protective housing 701 and a driving shaft 703 fixed on the cleaning brush 702. A conveying water pipe 706 is connected to the flushing nozzle 705.

[0027] Specifically, when the screen belt 602 moves, it will enter the protective housing 701. After the screen belt 602 enters the protective housing 701, the flushing nozzle 705 can be controlled to spray water to flush the screen belt 602. During the flushing process of the screen belt 602, the third motor 707 can be started. After starting the third motor 707, it will drive the cleaning brush 702 to rotate along the surface of the screen belt 602 to brush the screen belt 602, clean the ore stuck in the mesh of the screen belt 602, avoid blockage accidents, and cause little damage to the screen belt 602 during the cleaning process.

[0028] It should be noted that the present utility model is a coal mine crushing and screening device. During actual use, the ore is put into the feeding port 1. After the ore is put into the feeding port 1, the first motor 3 can be started to crush the ore. The crushed coal ore will be collected by the aggregate hopper 607. The coal ore collected by the aggregate hopper 607 will fall onto the screen belt 602 to screen the crushed coal ore. Once the mesh on the screen belt 602 is blocked during the screening process, the second motor 605 can be started. Since bearings are provided at both ends of the driving roller 603, the driving roller 603 is movably installed on the positioning frame 606 through the bearings, and the screen belt 602 is movably installed in the positioning frame 606 through the driving roller 603. A coupling is provided at the output end of the second motor 605, and one end of the driving roller 603 is fixed to the output end of the second motor 605 through the coupling. Therefore, after starting the second motor 605, it will move the screen belt 602, so that the unblocked part of the screen belt 602 moves under the aggregate hopper 607 for screening, while the blocked part of the screen belt 602 will enter the protective housing 701. After the blocked part of the screen belt 602 enters the protective housing 701, the flushing nozzle 705 can be controlled to spray water and the third motor 707 can be started. Since a coupling is provided at the output end of the third motor 707, one end of the drive shaft 703 is fixed to the output end of the third motor 707 through the coupling. Therefore, after starting the third motor 707, it will drive the cleaning brush 702 to rotate along the surface of the screen belt 602 to brush the screen belt 602, clean the ore stuck in the mesh of the screen belt 602, and avoid blockage accidents.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. 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 in the protection scope of the present utility model.

Claims

1. A coal mine crushing and screening device, comprising a box body (2), an inlet (1) is fixedly installed at the upper end of the box body (2), a discharge port (4) is fixedly installed at the lower end of the box body (2), a first motor (3) is fixedly installed on one side of the box body (2), and support feet (5) are fixedly installed at the four corners of the bottom of the box body (2), and it is characterized in that: Above the blanking port (4) inside the box body (2), a screening mechanism (6) is provided. The screening mechanism (6) includes a positioning frame (606) fixedly installed inside the box body (2). Inside the positioning frame (606), a driving roller (603) is movably installed. A screen belt (602) is arranged between the driving rollers (603). On the side wall of the positioning frame (606), a second motor (605) is fixedly installed. On the side wall of the box body (2), a cleaning mechanism (7) is provided. The cleaning mechanism (7) includes a protective housing (701) fixed on the side wall of the box body (2). Inside the protective housing (701), a cleaning brush (702) is movably installed. At the front end of the protective housing (701), a third motor (707) is fixedly installed. Inside the protective housing (701), a flushing nozzle (705) is provided.

2. The coal crushing and screening device according to claim 1, characterized in that: The screening mechanism (6) further includes an access notch (601) opened on the side wall of the box body (2) and a collecting hopper (607) fixed above the screen belt (602). At the bottom of the positioning frame (606), a support plate (604) is fixedly installed.

3. A coal mine crushing and screening device according to claim 2, characterized in that: A clamping groove is opened on the inner wall of the box body (2), and the collecting hopper (607) is fixed inside the box body (2) through the clamping groove.

4. A coal mine crushing and screening device according to claim 3, characterized in that: Bearings are provided at both ends of the driving roller (603). The driving roller (603) is movably installed on the positioning frame (606) through the bearings. The screen belt (602) is movably installed inside the positioning frame (606) through the driving roller (603). The screen belt (602) extends outside the box body (2) through the access notch (601). A coupling is provided at the output end of the second motor (605). One end of the driving roller (603) is fixed on the output end of the second motor (605) through the coupling.

5. A coal mine crushing and screening device according to claim 4, characterized in that: The cleaning mechanism (7) further includes an installation hole (704) opened at the upper end of the protective housing (701) and a driving shaft (703) fixed on the cleaning brush (702). A delivery water pipe (706) is connected to the flushing nozzle (705).

6. The coal mine crushing and screening device according to claim 5, wherein: Bearings are provided at both ends of the driving shaft (703). The driving shaft (703) is movably installed on the protective housing (701) through the bearings.

7. A coal mine crushing and screening device according to claim 6, characterized in that: A coupling is provided at the output end of the third motor (707). One end of the driving shaft (703) is fixed on the output end of the third motor (707) through the coupling. The flushing nozzle (705) is installed inside the protective housing (701) through the installation hole (704).

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