Crusher for underground coal bunker

Abstract

The utility model belongs to the technical field of underground coal crushing of coal mines, and particularly relates to a crusher for an underground coal bunker. Comprising a crusher and a supporting frame, a crushing channel is formed in the crusher, the crusher is fixed to the top of a coal bunker through the supporting frame in the posture that an inlet of the crushing channel inclines upwards and an outlet of the crushing channel inclines downwards, and coal conveyed by a belt conveyor flows into the coal bunker after being crushed through the crushing channel of the crusher; the crusher comprises a feeding cavity shell, a crushing cavity shell, a discharging cavity shell, a crushing hammer shaft and a driving device, the feeding cavity shell, the crushing cavity shell and the discharging cavity shell are buckled on the bottom plate to define a crushing channel, the crushing hammer shaft is transversely arranged in the crushing channel and connected with the crushing cavity shell, the driving device is installed outside the crushing cavity shell, and the driving device is connected with the discharging cavity shell. The driving device is connected with the breaking hammer shaft to drive the breaking hammer shaft to rotate; the crusher crushes large coals conveyed to the coal bunker from the belt conveyor for the second time and then falls into the coal bunker, so that large sundries are prevented from rising up to a well, and the length of an accident occurrence line is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal crushing in coal mines, and particularly relates to a crusher used in underground coal bunkers. Background Art

[0002] With the increase in coal production, coal quality has become increasingly important, and coal particle size is a key indicator of coal quality. Currently, underground working faces mine the entire mine surface at a single location, resulting in a high rate of lumping. Although shearers and crushers perform coal crushing, the results are not very effective, with collisions and bunker blockages frequently occurring. Conveyor belt accidents caused by large lumps of coal are also numerous. Therefore, reducing the rate of large lumps is a key factor in ensuring high mine production and efficiency. Since the coal bunker is responsible for the storage and transportation of coal, installing a crusher at the top of the bunker can effectively re-crush the coal. Utility Model Content

[0003] The utility model aims to solve the problem that after the raw coal mined from the working face is coarsely crushed by the chute crusher, large pieces of coal and gangue still exist, which do not meet the requirements.

[0004] The utility model provides the following technical solution: a crusher for an underground coal bunker, comprising a crusher and a support frame, wherein a crushing channel is provided in the crusher, and the crusher is fixed on the top of the coal bunker through the support frame with the entrance of the crushing channel inclined upward and the exit inclined downward. The coal transported by the belt conveyor passes through the crushing channel of the crusher and is crushed before flowing into the coal bunker.

[0005] Furthermore, the crusher includes a feed chamber shell, a crushing chamber shell, a discharge chamber shell, a breaker hammer shaft and a driving device. The feed chamber shell, the crushing chamber shell and the discharge chamber shell are buckled on the bottom plate to form a crushing channel. The breaker hammer shaft is placed horizontally in the crushing channel. The breaker hammer shaft is connected to the crushing chamber shell. The driving device is installed outside the crushing chamber shell. The driving device is connected to the breaker hammer shaft to drive the breaker hammer shaft to rotate.

[0006] Furthermore, the inlet of the discharge chamber shell is the same width as the crushing chamber shell, and the outlet is narrowed.

[0007] Furthermore, the driving device is mounted on the crushing chamber shell in a horizontal posture.

[0008] Furthermore, the driving device includes a motor, a reducer and a fluid coupling. The motor and the reducer are connected to transmit torque through the fluid coupling; the reducer and the breaker hammer shaft are connected through a plum blossom elastic coupling.

[0009] Furthermore, the feed chamber shell and the discharge chamber shell are connected and fixed to the crushing chamber shell by bolts and pins, and the bottoms of the feed chamber shell, the crushing chamber shell and the discharge chamber shell are connected and fixed to the bottom plate by bolts and pins.

[0010] Furthermore, pads are provided between the side plates and the bottom plate of the crushing chamber shell, and the height of the breaker hammer shaft can be adjusted by increasing or decreasing the number of pads.

[0011] Furthermore, the support frame is a triangular frame, the support frame is fixed to the base frame of the coal bunker through anchor bolts, and the bottom plate is fixed to the support frame through bolts.

[0012] Furthermore, the crusher is fixed on the top of the coal bunker with the crushing channel inclined at 21 degrees.

[0013] Furthermore, the support frame is a right-angled triangle frame body, the bottom plate is installed on the hypotenuse of the support frame, a stopper is fixed at the bottom of the hypotenuse of the support frame, and the discharge chamber shell is stopped by the stopper.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] This utility model provides a crusher for underground coal bunkers. Installed on top of the bunker, the crusher crushes large lumps of coal transported by a conveyor belt into the bunker, subjecting them to secondary crushing before dropping them into the bunker. This prevents large debris from rising into the well, shortening the length of the accident line. It also reduces the speed at which coal enters the bunker, minimizing the impact on the bunker walls. The crusher utilizes the immense inertia of the high-speed hammer shaft to crush material. The crusher achieves varying crushing sizes by adjusting the height of the hammer shaft from the baseplate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of crusher installation;

[0017] Figure 2 This is a schematic diagram of the crusher and support frame assembly;

[0018] Figure 3 It is a side view of the discharge chamber housing;

[0019] Figure 4 It is a front view of the discharge chamber shell;

[0020] Figure 5 is a schematic diagram of the driving device;

[0021] Figure 6 Schematic diagram of the breaker hammer shaft.

[0022] In the figure: 1-crusher; 1.1-feeding chamber shell; 1.2-crushing chamber shell; 1.3-discharging chamber shell; 1.4-driving device; 1.5-breaking hammer shaft; 1.6-bottom plate; 1.7-pad; 2-support frame; 2.1-anchor bolt; 2.2-stopper; 3-coal bunker; 4-conveyor belt. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] like Figure 1 As shown: A crusher for an underground coal bunker includes a crusher 1 and a support frame 2. The crusher 1 has a crushing channel. The crusher 1 is fixed to the top of the coal bunker 3 through the support frame 2 with the entrance of the crushing channel tilted upward and the outlet tilted downward. The coal transported by the belt conveyor 4 passes through the crushing channel of the crusher 1 and is crushed before flowing into the coal bunker 3.

[0025] like Figure 2 As shown: Crusher 1 includes feeding chamber shell 1.1, crushing chamber shell 1.2, discharging chamber shell 1.3, hammer shaft 1.5 and driving device 1.4. Feeding chamber shell 1.1, crushing chamber shell 1.2 and discharging chamber shell 1.3 are buckled on bottom plate 1.6 to form a crushing channel. Hammer shaft 1.5 is placed horizontally in the crushing channel and connected to crushing chamber shell 1.2. Driving device 1.4 is installed outside crushing chamber shell 1.2 and connected to hammer shaft 1.5 to drive hammer shaft 1.5 to rotate. Bottom plate 1.6 is a high-strength wear-resistant plate. Hammer shaft 1.5 crushes the coal that falls on bottom plate 1.6 and flows into coal bunker along bottom plate 1.6. Figure 6 As shown, a plurality of hammer heads are mounted on the breaker hammer shaft 1.5, and the coal is crushed by the high-speed rotation of the breaker hammer shaft 1.5.

[0026] Specifically, crusher 1 is mounted on top of coal bunker 3 with its crushing channel tilted 21°, ensuring that the crusher's inlet faces the coal drop point of the conveyor. Drive unit 1.4 is mounted horizontally on crushing chamber housing 1.2. A tilted drive unit 1.4 could cause operational problems.

[0027] like Figure 3 、 Figure 4 As shown: the inlet of the discharge chamber shell 1.3 is the same width as the crushing chamber shell 1.2, and the outlet is narrowed. The conical structure of the discharge chamber shell 1.3 can slow down the outflow speed of the coal blocks, prolong the residence time of the coal blocks in the crushing chamber shell 1.2, and crush the coal blocks more thoroughly.

[0028] like Figure 5As shown, the drive device 1.4 includes a motor 1.4.1, a reducer 1.4.3 and a fluid coupling 1.4.2. The motor 1.4.1 and the reducer 1.4.3 are connected via the fluid coupling 1.4.2 to transmit torque; the reducer 1.4.3 is connected to the breaker shaft 1.5 via a plum blossom elastic coupling.

[0029] The feed chamber shell 1.1 and the discharge chamber shell 1.3 are connected and fixed to the crushing chamber shell 1.2 by bolts and pins. The bottoms of the feed chamber shell 1.1, the crushing chamber shell 1.2 and the discharge chamber shell 1.3 are connected and fixed to the bottom plate 1.6 by bolts and pins.

[0030] Pads 1.7 are arranged between the side plates and the bottom plate 1.6 of the crushing chamber shell 1.2. The height of the breaker hammer shaft 1.5 can be adjusted by increasing or decreasing the number of layers of the pads 1.7, thereby obtaining different crushing particle sizes.

[0031] The support frame 2 is a triangular frame formed by welding channel steel. The support frame 2 is fixed to the foundation frame of the coal bunker 3 by anchor bolts 2.2, and the bottom plate 1.6 is fixed to the support frame 2 by bolts.

[0032] The support frame 2 is a right-angled triangle frame, and the base plate 1.6 is installed on the hypotenuse of the support frame 2. A stopper 2.1 is fixed to the bottom of the hypotenuse of the support frame 2. The discharge chamber shell 1.3 is stopped by the stopper 2.1 to prevent the bolts connecting the feed chamber shell 1.1, the crushing chamber shell 1.2 and the discharge chamber shell 1.3 from being sheared off by the continuous impact of coal blocks on the crusher 1.

[0033] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A crusher for underground coal bunker, characterized by: The invention comprises a crusher (1) and a support frame (2). The crusher (1) has a crushing channel. The crusher (1) is fixed on the top of a coal bunker (3) through the support frame (2) with the entrance of the crushing channel tilted upward and the exit tilted downward. Coal transported by a belt conveyor (4) passes through the crushing channel of the crusher (1) and is crushed before flowing into the coal bunker (3).

2. A crusher for underground coal bunker according to claim 1, characterized in that: The crusher (1) comprises a feed chamber housing (1.1), a crushing chamber housing (1.2), a discharge chamber housing (1.3), a breaker hammer shaft (1.5) and a drive device (1.4). The feed chamber housing (1.1), the crushing chamber housing (1.2) and the discharge chamber housing (1.3) are buckled on a bottom plate (1.6) to form a crushing channel. The breaker hammer shaft (1.5) is horizontally placed in the crushing channel. The breaker hammer shaft (1.5) is connected to the crushing chamber housing (1.2). The drive device (1.4) is installed outside the crushing chamber housing (1.2). The drive device (1.4) is connected to the breaker hammer shaft (1.5) to drive the breaker hammer shaft (1.5) to rotate.

3. A crusher for underground coal bunker according to claim 2, characterized in that: The inlet of the discharge chamber shell (1.3) is the same width as the crushing chamber shell (1.2), and the outlet is narrower.

4. A crusher for underground coal bunker according to claim 2, characterized in that: The driving device (1.4) is mounted on the crushing chamber shell (1.2) in a horizontal posture.

5. The crusher for underground coal bunker according to claim 4, characterized in that: The driving device (1.4) includes a motor (1.4.1), a reducer (1.4.3) and a fluid coupling (1.4.2). The motor (1.4.1) and the reducer (1.4.3) are connected via the fluid coupling (1.4.2) to transmit torque; the reducer (1.4.3) and the breaker shaft (1.5) are connected via a plum blossom elastic coupling.

6. The crusher for underground coal bunker according to claim 2, characterized in that: The feed chamber shell (1.1) and the discharge chamber shell (1.3) are connected and fixed to the crushing chamber shell (1.2) via bolts and pins, and the bottoms of the feed chamber shell (1.1), the crushing chamber shell (1.2) and the discharge chamber shell (1.3) are connected and fixed to the bottom plate (1.6) via bolts and pins.

7. A crusher for underground coal bunker according to claim 6, characterized in that: Pads (1.7) are provided between the side plates and the bottom plate (1.6) of the crushing chamber shell (1.2), and the height of the crushing hammer shaft (1.5) is adjusted by increasing or decreasing the number of layers of the pads (1.7).

8. A crusher for underground coal bunker according to any one of claims 2 to 7, characterized in that: The support frame (2) is a triangular frame body. The support frame (2) is fixed to the base frame of the coal bunker (3) through anchor bolts (2.2), and the bottom plate (1.6) is fixed to the support frame (2) through bolts.

9. A crusher for underground coal bunker according to any one of claims 1 to 7, characterized in that: The crusher (1) is fixed on the top of the coal bunker (3) with the crushing channel inclined at 21 degrees.

10. The crusher for underground coal bunker according to claim 8, characterized in that: The support frame (2) is a right-angled triangle frame, the bottom plate (1.6) is installed on the hypotenuse of the support frame (2), a stopper (2.1) is fixed at the bottom of the hypotenuse of the support frame (2), and the discharge chamber shell (1.3) is stopped by the stopper (2.1).

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