CN106423505A - Mining screening mechanism - Google Patents

Abstract

The invention provides a mining screening mechanism. The problems that in the prior art, lump coal crushing and screening cannot reach the standard are solved. The mining screening mechanism comprises a crushing device, a smashing device, a primary screening device and a secondary screening device. The crushing device comprises a crushing cylinder and a crushing feeding hopper. A fixed crushing cutter and a movable crushing cutter are arranged in the crushing cylinder. The movable crushing cutter is connected with a hydraulic drive, the fixed crushing cutter is arranged on the bottom of the crushing cylinder, and a shaking device is arranged below the crushing cylinder. The discharging end of the crushing device communicates with a feeding port of the smashing device. The smashing device comprises a smashing cylinder. The smashing cylinder is internally provided with a smashing shaft, the smashing shaft is connected with a smashing rod, the smashing rod is connected with a smashing hammer, and the primary screening device is arranged below the smashing shaft. According to the mining screening mechanism, lump crushing is carried out first, then, smashing is carried out through the smashing hammer, on one hand, the crushing efficiency can be improved, and on the other hand, the action time of the smashing hammer can be shortened, over smashing of materials is prevented, moreover, lumps are crushed into small blocks, and the screening effect is relatively good.

Description

Mining screening mechanism

technical field

The invention belongs to the field of underground coal mines, and in particular relates to a mining screening mechanism.

Background technique

Coal ore needs to be crushed and screened before further processing. Due to the relatively large volume of lump coal, there will be two problems during crushing: 1. Too long crushing time leads to over-crushing; 2. The degree of crushing does not meet the requirements, and the crushing is not good, resulting in the effect of later screening is not obvious. Affect transportation or post-processing.

Contents of the invention

The object of the present invention is to propose a mining screening mechanism aiming at the deficiencies of the above-mentioned prior art, which solves the problem of broken lump coal and unqualified screening in the prior art.

The technical solution of the present invention is achieved in this way: a mine screening mechanism includes a crushing device, a crushing device, a primary screening device and a secondary screening device, the crushing device includes a crushing cylinder and a crushing hopper, and the crushing device includes a crushing cylinder and a crushing hopper. There are fixed crushing knives and movable crushing knives inside the cylinder, the movable crushing knives are connected with the hydraulic drive, the fixed crushing knives are set at the bottom of the crushing cylinder, and a vibrating device is installed under the crushing cylinder; the discharge end of the crushing device is fed to the crushing device The mouth is connected, the crushing device includes a crushing cylinder, the crushing cylinder is equipped with a crushing shaft, the crushing shaft is connected with the crushing rod, the crushing rod is connected with a crushing hammer, the primary screening device under the crushing shaft, the primary screening device includes the primary screen basket in turn , secondary screen basket and tertiary screen basket. As for the discharge port, a third discharge port is provided below the three-stage sieve basket, and the first discharge port communicates with the feed port of the secondary screening device.

The secondary screening device includes a cylindrical screening frame composed of several connecting bars, a rotating shaft is arranged in the middle of the screening frame, and crushing teeth are arranged on the rotating shaft.

The outer wall of the screening frame is connected with one end of the anti-blocking strip.

Several magnetic rods arranged side by side are arranged between the pulverizing device and the primary screening device.

In the present invention, the large pieces are crushed first, and then the crushing hammer is crushed. On the one hand, the crushing efficiency can be improved, and on the other hand, the action time of the crushing hammer can be reduced to prevent the material from being over-crushed, and the large pieces can be broken into small pieces in time for screening. The effect is also better.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of the present invention.

Figure 2 is a side view of the secondary screening device.

Among them: 1. Crushing device, 1-1. Crushing hopper, 1-2. Hydraulic drive, 1-3. Movable crushing knife, 1-4. Fixed crushing knife, 1-5. Vibration device, 1-6. Crushing cylinder, 2. Crushing device, 2-1. Crushing cylinder, 2-2. Crushing shaft, 2-3. Crushing rod, 2-4. Crushing hammer, 3. Primary screening device, 3-1. First outlet, 3-2. Second outlet, 3-3. Third outlet, 3-4. Rotary drive, 3-5. Sieve hole, 3-6. Primary screen basket, 3-7 .Secondary screen basket, 3-8. Tertiary screen basket, 4. Secondary screening device, 4-1. Screening frame, 4-2. Rotary shaft, 4-3. Broken teeth, 4-4. Anti-blocking Bar, 5. Magnetic bar, 6. Block.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, a mining screening mechanism includes a crushing device 1, a crushing device 2, a primary screening device 3 and a secondary screening device 4, and the crushing device 1 includes a crushing cylinder 1-6 and a crushing inlet Hopper 1-1, crushing cylinder 1-6 are equipped with fixed crushing knife 1-4 and movable crushing knife 1-3, movable crushing knife 1-3 is connected with hydraulic drive 1-2, fixed crushing knife 1-4 is set At the bottom of the crushing cylinder 1-6, a vibrating device 1-5 is provided below the crushing cylinder 1-6; the discharge end of the crushing device 1 communicates with the feed port of the crushing device 2, and the crushing device 2 includes a crushing cylinder 2-1 , the crushing cylinder 2-1 is provided with a crushing shaft 2-2, the crushing shaft 2-2 is connected with the crushing rod 2-3, the crushing rod 2-3 is connected with a crushing hammer 2-4, and the primary Screening device 3, primary screening device 3 comprises primary sieve basket 3-6, secondary sieve basket 3-7 and tertiary sieve basket 3-8 successively, primary sieve basket 3-6, secondary sieve basket 3-7 and The three-stage screen basket 3-8 is connected with the rotary drive 3-4, the primary screen basket 3-6 is provided with a first discharge port 3-1, and the secondary screen basket 3-7 is provided with a second discharge port 3- 2. A third discharge port 3-3 is provided below the third-stage screen basket 3-8, and the first discharge port 3-1 communicates with the feed port of the secondary screening device 4.

The working principle of the present invention is as follows: the large block material 6 first enters the crushing device 1, and when the hydraulic drive 1-2 moves downward, the movable crushing knife 1-3 and the fixed crushing knife 1-4 act on the block material 6 at the same time, so that The block material is first crushed into a medium size and then enters the crushing device 2. When the two crushing shafts 2-2 rotate in opposite directions, the crushing hammer 2-4 hits the block material to make it crushed into small pieces, and then falls into the primary screening device 3 below. , when the rotating drive 3-4 rotates, it drives the primary screen basket 3-6, the secondary screen basket 3-7 and the third-stage screen basket 3-8 to rotate, and the block material passes through the three-stage screen holes 3-8 from large to small in turn. 5. The volume of the material coming out of the third outlet 3-3 is the smallest, the volume of the material coming out of the first outlet 3-1 is relatively large, and the material coming out of the first outlet 3-1 enters the secondary sieve sub-device 4 for reprocessing.

The present invention breaks large pieces first, and then crushes them with a breaking hammer. On the one hand, it can improve the crushing efficiency; Later processing and transportation.

As shown in Figure 2, the secondary screening device 4 includes a cylindrical screening frame 4-1 made up of several connecting bars, the middle part of the screening frame 4-1 is provided with a rotating shaft 4-2, and the rotating shaft 4-2 It is provided with crushing teeth 4-3. When the driving device drives the rotating shaft 4-2 to rotate, the crushing tooth 4-3 can crush the large material again, and the size of the blank can be controlled by adjusting the distance between the two connecting bars. On the one hand, the screening device 4 can play the role of crushing slightly larger materials again, and also play the role of screening.

Preferably, the outer wall of the screening frame 4-1 is connected to one end of the anti-blocking bar 4-4. The anti-blocking strip 4-4 will knock the screening frame 4-1 when it is subjected to vibration, so as to prevent large pieces of material from being stuck between the connecting strips.

Further, a number of magnetic bars 5 arranged side by side are provided between the crushing device 2 and the primary screening device 3 . On the one hand, the magnetic bar can absorb iron substances in the material, and on the other hand, it can also play the role of a baffle, so that the impact effect of the crushing hammer is better.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (4)

1. a kind of mining sorting mechanism, including breaker（1）, reducing mechanism（2）, primary screen apparatus（3）With secondary screening Device（4）It is characterised in that：Described breaker（1）Including breaker rotor（1-6）With feed-crushing bucket（1-1）, breaker rotor （1-6）Inside it is provided with fixing crushing cutter（1-4）With movable crushing cutter（1-3）, movable crushing cutter（1-3）With hydraulic-driven（1-2）Phase Even, fixing crushing cutter（1-4）It is arranged on breaker rotor（1-6）Bottom, breaker rotor（1-6）Lower section is provided with shaking device（1-5）； Breaker（1）Discharge end and reducing mechanism（2）Charging aperture connects, reducing mechanism（2）Including pulverizing cylinder（2-1）, pulverize Cylinder（2-1）Inside it is provided with crushing shaft（2-2）, crushing shaft（2-2）With pulverizing bar（2-3）It is connected, pulverize bar（2-3）On be connected with pulverizing Hammer（2-4）, crushing shaft（2-2）Lower section primary screen apparatus（3）, primary screen apparatus（3）Include primary sieve basket successively（3-6）、 Two grades of sieve baskets（3-7）Sieve basket with three-level（3-8）, primary sieve basket（3-6）, two grades of sieve baskets（3-7）Sieve basket with three-level（3-8）With rotation Drive（3-4）It is connected, primary sieve basket（3-6）Lower section is provided with the first discharging opening（3-1）, two grades of sieve baskets（3-7）Lower section is provided with second Discharging opening（3-2）, three-level sieve basket（3-8）Lower section is provided with the 3rd discharging opening（3-3）, the first discharging opening（3-1）With secondary screening dress Put（4）Charging aperture connection.

2. mining sorting mechanism according to claim 1 it is characterised in that：Described secondary screening plant（4）If including by The columnar screening frame of involvement narrow bars composition（4-1）, sieve frame（4-1）Middle part is provided with rotating shaft（4-2）, rotating shaft（4-2）On set There is crushing teeth（4-3）.

3. mining sorting mechanism according to claim 2 it is characterised in that：Screening frame（4-1）Outer wall and anti-blocking bar（4-4） One end is connected.

4. mining sorting mechanism according to claim 3 it is characterised in that：Described reducing mechanism（2）With primary screening dress Put（3）Between be provided with some magnetic bars being arranged side by side（5）.