Device for removing large iron blocks in mine aggregate processing

Abstract

The invention relates to the field of mine aggregate processing, in particular to a device for removing large iron blocks in mine aggregate processing. Comprising a vibrating screen and an iron belt removing machine, the vibrating screen is provided with a vibrating screen body structure, a vibrating screen mesh is arranged on the lower portion of the vibrating screen body structure, a feeding end is arranged at the end, away from the iron belt removing machine, of the vibrating screen body structure, and a discharging end is arranged at the end, close to the iron belt removing machine, of the vibrating screen body structure. A plurality of grate bars are arranged, the distance is determined according to the particle size of materials, and a camera is arranged on the upper portion of each grate bar. The grate bars are arranged at the tail of the screen mesh of the primary crushing vibrating screen, screening is conducted according to the particle size of materials, large iron blocks such as excavator bucket teeth, drill bits, wear-resistant parts and lining plates and block stones with large particle size are guided to the iron belt removing machine, and the iron blocks with large weight are effectively removed through the iron belt removing machine; and under the condition that the production efficiency of a machining system is not affected, large iron blocks are prevented from entering the next procedure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mine aggregate processing, in particular to a device for removing large iron blocks in mine aggregate processing. BACKGROUND

[0002] In the process of mine aggregate processing, large crushing equipment such as cone crusher and hammer crusher will be damaged if iron blocks enter the equipment, which will cause certain losses to the mine operation and maintenance. The traditional countermeasures are to install electromagnets or powerful magnets above the belt conveyor conveying the materials to remove the iron blocks in the materials. However, this type of iron removal facility can only attract steel bars or small iron blocks, and cannot effectively remove large iron blocks, such as excavator bucket teeth, drill bits damaged in the mining process, and wear-resistant parts or lining plates falling off the processing equipment, because the iron blocks are heavy and the existing iron removal device cannot effectively attract and remove them. SUMMARY

[0003] In order to solve the problem that the powerful magnets cannot effectively attract the iron blocks and protect the operation and maintenance equipment, the device is invented. The device is provided with grating bars at the tail of the primary crushing vibrating screen screen mesh to screen the materials according to their particle size, and the materials with a particle size larger than that of the common iron blocks are guided to an iron removal belt conveyor to effectively remove the large iron blocks without affecting the production efficiency of the processing system.

[0004] In order to achieve the above-mentioned purposes, the present application adopts the following technical solutions:

[0005] The device for removing large iron blocks in mine aggregate processing comprises a vibrating screen and an iron removal belt conveyor. The vibrating screen has a vibrating screen main structure, a vibrating screen mesh arranged at the lower part of the vibrating screen main structure, an inlet end head arranged at the end of the vibrating screen main structure away from the iron removal belt conveyor, an outlet end head arranged at the end of the vibrating screen main structure close to the iron removal belt conveyor, grating bars arranged at the outlet end head, a plurality of grating bars arranged at the outlet end head, the spacing of which is determined according to the particle size of the materials, and a camera arranged at the upper part of the grating bars.

[0006] Preferably, the camera analyzes the particle size of the materials on the grating bars, and the automatic control system automatically adjusts the telescopic hydraulic cylinder between the upper leg and the lower leg to control the inclination angle of the belt conveyor.

[0007] Preferably, the lower part of the grating bars is provided with the iron removal belt conveyor, the belt conveyor main frame is arranged on the iron removal belt conveyor, the belt conveyor legs are arranged at the lower part of both ends of the belt conveyor main frame, and the belt conveyor main frame is arranged in an inclined state through the belt conveyor legs.

[0008] Preferably, the belt conveyor legs are divided into upper legs and lower legs, the upper legs and the lower legs are hinged on one side, and a telescopic hydraulic cylinder is installed between the upper legs and the lower legs on the other side.

[0009] The preferred belt conveyor main frame is provided with a baffle plate near the side of the grate, and a discharge guide groove is arranged on the side of the belt conveyor main frame away from the grate.

[0010] The preferred belt conveyor main frame is provided with a driving roller at one end and a driven roller at the other end, and a belt connection is arranged between the driving roller and the driven roller.

[0011] The preferred belt conveyor main frame is provided with a belt driving motor near the side of the driving roller at the lower part, and the belt driving motor is fixed with the belt conveyor main frame through a motor connecting plate, and a motor transmission belt is connected between the belt driving motor and the driving roller.

[0012] The preferred belt conveyor main frame is provided with an electromagnetic box at the lower part of the belt between the driving roller and the driven roller, and the belt slides on the top surface of the electromagnetic box.

[0013] Compared with the prior art, the beneficial effects of the application are: by arranging a grate at the tail of the primary crushing vibrating screen screen, the material is screened according to the particle size, and larger iron blocks such as excavator bucket teeth, drill bits, wear-resistant parts, and lining plates are guided together with larger stones to an iron removal belt conveyor, and the iron blocks with larger weight are effectively removed by the iron removal belt conveyor, without affecting the production efficiency of the processing system, and the large iron blocks are blocked from entering the next process. The high-speed camera arranged on the upper part of the grate analyzes the particle size of the material on the grate, and the telescopic hydraulic cylinders of the iron removal belt legs are automatically adjusted according to the size of the material particle size, and the inclination angle of the belt conveyor is controlled, so as to better adapt to the effect of removing iron blocks of different particle size materials. The safety of the running equipment is fully guaranteed, the use cost is reduced, the equipment operation efficiency is increased, and the operation and maintenance benefit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings.

[0015] Figure 1 is a structural schematic diagram of the present application Figure 1 .

[0016] Figure 2 is a structural schematic diagram of the present application Figure 2 .

[0017] Figure 3 is a schematic diagram of the iron removal belt conveyor in the present application. DETAILED DESCRIPTION

[0018] The present application will be further described in detail by the following examples, which are only used to illustrate the present application and do not limit the scope of the present application.

[0019] As Figures 1-3As shown, the present application provides a technical scheme: a device for removing large iron blocks in mine aggregate processing, comprising a vibrating screen 1 and an iron removal belt machine 2. The vibrating screen 1 has a vibrating screen main body structure 11, the lower part of the vibrating screen main body structure 11 is provided with a vibrating screen screen 12, the end of the vibrating screen main body structure 11 away from the iron removal belt machine 2 is provided with a feeding end head 13, the end of the vibrating screen main body structure 11 close to the iron removal belt machine 2 is provided with a discharging end head 14, the discharging end head 14 is provided with a grate 15, the grate 15 is provided with a plurality of roots, the grate 15 is fixedly connected with the discharging end head 14, and the spacing is determined according to the particle size of the material. The top of the grating 15 on both sides is provided with a grating side plate 16, which is used to prevent the material from overflowing. The lower part of the vibrating screen main body structure 11 is provided with four vibrating screen supporting legs 17 and a vibrating motor supporting leg 18.

[0020] The end of the grating 15 is provided with the iron removal belt machine 2, the iron removal belt machine 2 is provided with a belt machine main frame 22, the lower part of the two ends of the belt machine main frame 22 is provided with a belt machine supporting leg 23, and the belt machine main frame 22 is set in an inclined state through the belt machine supporting leg 23. The belt machine supporting leg 23 is divided into an upper supporting leg 231 and a lower supporting leg 232, one side between the upper supporting leg 231 and the lower supporting leg 232 is hinged, and the other side is provided with a telescopic hydraulic cylinder 233 between the upper supporting leg 231 and the lower supporting leg 232. The side close to the grating 15 of the belt machine main frame 22 is provided with a baffle 25, and the side away from the grating 15 of the belt machine main frame 22 is provided with a discharging guide groove 24. One end of the belt machine main frame 22 is provided with a driving drum 29, and the other end is provided with a driven drum 210, and the driving drum 29 and the driven drum 210 are connected through a belt 21. The side close to the driving drum 29 of the lower part of the belt machine main frame 22 is provided with a belt driving motor 26, the belt driving motor 26 is fixed with the belt machine main frame 22 through a motor connecting plate 27, and the belt driving motor 26 and the driving drum 29 are connected through a motor transmission belt 28.

[0021] The lower part of the belt 21 between the driving drum 29 and the driven drum 210 is provided with an electromagnetic box 211, and the belt 21 slides on the top surface of the electromagnetic box 211.

[0022] A camera 212 is arranged on the upper part of the grating 15, and the camera 212 is fixed with the lower supporting leg 232 through a vertical rod.

[0023] The working process of the present application: the material containing large iron blocks after coarse crushing is transported to the vibrating screen 1 and is discharged on the vibrating screen mesh 12 of the feed end head 13 for screening, the material with a diameter smaller than the mesh diameter of the vibrating screen mesh 12 falls into the screen below and is transported away by other belt conveyors. The material with a larger diameter and large iron blocks move along the vibrating screen mesh 12 to the grate bars 15 connected with the discharge end head 14, the grate bars 15 have a plurality of net spaces smaller than the size of the large iron blocks, so that the large iron blocks and the material with a large particle size move along the grate bars 15 and fall on the belt 21 of the iron removal belt conveyor 2, and the material with a small particle size falls from the gap between the grate bars 15 and is concentrated to fall into other equipment for crushing in the corresponding crushing equipment.

[0024] The iron removal belt conveyor 2 is provided with a belt conveyor main frame 22, the belt conveyor main frame 22 is provided with a belt conveyor leg 23 at the lower part of both ends, the belt conveyor main frame 22 is arranged in an inclined state through the belt conveyor leg 23, so that the material falls on the iron removal belt conveyor 2 and slides down along the slope under the action of gravity, and enters other conveying equipment under the guidance of the discharge guide groove 24 to the corresponding crushing equipment for crushing.

[0025] The belt 21 provided on the iron removal belt conveyor 2 continuously rotates under the drive of the drive drum 29, and the electromagnetic box 211 below the belt 21 generates a strong magnetic force after being powered on. After the large iron blocks and the material with a large particle size fall on the inclined belt 21, the large iron blocks are adsorbed on the belt 21 under the action of the strong magnetic force generated by the electromagnetic box 211, and no longer fall along the slope with other materials, but move along with the belt 21 to the driven drum 210 side, until the large iron blocks are separated from the material.

[0026] The camera 212 analyzes the particle size of the material on the grate bar, and automatically adjusts the telescopic hydraulic cylinder 233 between the upper leg 231 and the lower leg 232 through the automatic control system according to the size of the particle size of the material, and then controls the inclination angle of the belt conveyor to achieve the best iron removal effect. When the particle size of the material is <80mm, the inclination angle of the belt 21 is adjusted to 35° through the telescopic hydraulic cylinder 233, when the particle size of the material is 80mm-100mm, the inclination angle of the belt 21 is adjusted to 30° through the telescopic hydraulic cylinder 233, and when the particle size of the material is >100mm, the inclination angle of the belt 21 is adjusted to 25° through the telescopic hydraulic cylinder 233.

[0027] The particle size recognition algorithm of the camera 212 is:

[0028] Image acquisition: the camera 212 collects the material image on the grate bar at a fixed frequency (for example, 10 frames per second).

[0029] Image preprocessing: Denoising (e.g. median filter), grayscale, binarization, etc. to facilitate subsequent segmentation.

[0030] Material segmentation: Use edge detection (e.g. Canny operator) or threshold segmentation method to separate materials from the background.

[0031] Particle size calculation: Calculate the equivalent diameter of each segmented material region (e.g. calculate the diameter of a circle by area: d = 2*sqrt(area / π)). Then, calculate the average particle size or maximum particle size of the current frame (select according to actual needs, here we assume to use the average particle size).

[0032] Control algorithm: According to the current identified particle size, select the corresponding tilt angle. At the same time, in order to realize smooth adjustment and avoid angle mutation, incremental control or filter link can be used.

[0033] Specific process: Get the average particle size d of the current frame material.

[0034] According to the rule table, get the target angle θ_target.

[0035] Read the current tilt angle θ_current (obtained by tilt sensor).

[0036] Calculate the angle deviation: Δθ = θ_target - θ_current.

[0037] According to the deviation, calculate the extension amount (displacement) ΔL of the hydraulic cylinder. Here we need to establish the mathematical relationship between the change of angle and the extension amount of the hydraulic cylinder.

[0038] Hydraulic cylinder control model

[0039] Assume that the tilt angle of the belt conveyor is controlled by the extension amount of the hydraulic cylinder, and there is a linear relationship between them (in practice, calibration may be needed):

[0040] Let the initial length of the hydraulic cylinder be L0, and when the angle is 0°, the length of the hydraulic cylinder is L0.

[0041] When the angle changes Δθ, the relationship between the extension amount ΔL of the hydraulic cylinder and Δθ is: ΔL = k*Δθ, where k is the proportional coefficient (unit: mm / °), determined by mechanical structure (e.g. leg spacing, hydraulic cylinder installation position, etc.).

[0042] Control instruction:

[0043] Target length of hydraulic cylinder: L_target = L0 + ΔL = L0 + k*(θ_target - θ_current);

[0044] The control signal of the hydraulic cylinder (e.g. PWM duty cycle or valve opening) is adjusted by a controller (e.g. PID controller) according to the deviation of the target length and the current length (measured by displacement sensor).

[0045] To avoid mechanical impact caused by too fast angle adjustment, the following methods can be used:

[0046] Incremental control: only adjust a part of the deviation each time, for example: ΔL_step = α * ΔL, where α is the adjustment coefficient (0 < α < 1), and then gradually approach the target value.

[0047] PID control: PID operation is performed on the angle deviation, and the extension speed or displacement of the hydraulic cylinder is output. The PID parameters need to be adjusted according to the system response characteristics.

[0048] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and such changes and modifications fall within the protection scope of the present application.

Claims

1. A device for removing large iron pieces from mine aggregate processing, characterized by, Including vibrating screen and iron removal belt machine, the vibrating screen has a vibrating screen main structure, a vibrating screen screen mesh arranged at the lower part of the vibrating screen main structure, a feeding end head arranged at the end of the vibrating screen main structure away from the iron removal belt machine, and a discharging end head arranged at the end of the vibrating screen main structure close to the iron removal belt machine, the discharging end head is provided with a plurality of grating bars, the spacing is determined according to the size of the material particle diameter, and a camera is arranged at the upper part of the grating bar.

2. The device for removing large pieces of iron from mine aggregate processing according to claim 1, characterized in that, The camera analyzes the material particle diameter on the grating bar, and the automatic control system automatically adjusts the telescopic hydraulic cylinder between the upper support leg and the lower support leg according to the size of the material particle diameter, thereby controlling the inclination angle of the belt machine.

3. The device for removing large pieces of iron from mine aggregate processing according to claim 2, characterized in that, The lower part of the grating bar is provided with an iron removal belt machine, the belt machine main frame is arranged on the iron removal belt machine, the belt machine support legs are arranged at the lower part of both ends of the belt machine main frame, and the belt machine main frame is arranged in an inclined state through the belt machine support legs.

4. The device for removing large pieces of iron from mine aggregate processing according to claim 3, characterized in that, The belt machine support legs are divided into upper support legs and lower support legs, one side of the upper support leg and the lower support leg is hinged, and the other side is provided with a telescopic hydraulic cylinder between the upper support leg and the lower support leg.

5. The device for removing oversize iron pieces from mine aggregate processing according to claim 4, characterized in that, The side of the belt machine main frame close to the grating bar is provided with a baffle, and the side of the belt machine main frame away from the grating bar is provided with a discharging guide groove.

6. The device for removing oversize iron pieces from mine aggregate processing according to claim 5, characterized in that, One end of the belt machine main frame is provided with a driving roller, and the other end is provided with a driven roller, and a belt connection is arranged between the driving roller and the driven roller.

7. The device for removing oversize iron pieces from mine aggregate processing according to claim 6, characterized in that, The lower part of the belt machine main frame close to the driving roller is provided with a belt driving motor, the belt driving motor is fixed with the belt machine main frame through a motor connecting plate, and the belt driving motor and the driving roller are connected through a motor transmission belt.

8. The device for removing oversize iron pieces from mine aggregate processing according to claim 7, characterized by the fact that, An electromagnetic box is arranged below the belt between the driving roller and the driven roller, and the belt slides on the top surface of the electromagnetic box.

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