Metal foreign matter separation and automatic fire coal backflow device

Abstract

The utility model relates to a device for separating metal foreign matters and automatically reflowing fire coal. The device comprises a fire coal conveying device and a fire coal screening device, the fire coal conveying device comprises a rotary throwing type impurity removing machine and a raw coal conveying belt; the fire coal screening device comprises a permanent magnet roller; the rotary throwing type impurity removing machine is provided with a plurality of toothed plates; a coal falling barrel is arranged below the tail part of the raw coal conveying belt; a buffer box is arranged below the rotary throwing type impurity removing machine; an inclined mechanism is arranged at the bottom of the buffer tank; a backflow conveying belt is arranged below the lower end of the buffer tank; the roller of the backflow conveying belt close to one side of the coal falling cylinder is a permanent magnet roller. The utility model has the beneficial effects that through the cooperation of the permanent magnetic roller and the conveyor belt, the efficient separation of metal foreign matters and fire coal is realized, and the traditional manual screening process is optimized; the tilting mechanism ensures stable operation of the equipment; due to the integrated automatic cleaning and backflow mechanism, the working efficiency is improved, and the operation cost of equipment is reduced; the compact integrated design is suitable for upgrading and transformation of an existing coal conveying system.

Description

Technical Field

[0001] This utility model relates to the field of coal mining, and in particular includes a metal foreign matter separation and automatic coal reflux device. Background Technology

[0002] During coal transportation and storage, large metal objects may become mixed into the coal pile. If these objects are not removed in time, they will cause serious damage to subsequent conveying equipment and may even lead to major accidents such as belt tearing. Currently, magnetic separators are commonly used in industrial sites to treat metal objects in coal piles. However, magnetic separators have a limited operating range and can only treat surface metal objects, failing to effectively detect or remove large metal objects buried at the bottom or deeper parts of the coal pile.

[0003] To address the aforementioned issues, the combination of a metal foreign object detection device and a rotary polisher provides an efficient solution for removing metal foreign objects. The detection device can accurately locate metal foreign objects in the coal pile and trigger the rotary polisher to start the removal operation. During the rotation of the rotary polisher, as the coal flow passes through the toothed plate separation device, the rotating toothed plates can hook out metal foreign objects larger than the tooth spacing in the coal flow and transport them to the collection trolley, ensuring that the removal process is efficient and continuous.

[0004] However, in actual operation, when removing large metal objects, a large amount of large pieces of coal are often also cleaned into the collection trolley. This results in the metal objects and coal being mixed together in the collection trolley, making direct separation difficult and requiring secondary manual screening. This not only significantly increases the workload of on-site maintenance personnel but also has a noticeable impact on overall maintenance efficiency. Furthermore, the coal recovery process requires additional time and manpower. If the coal is not recovered in a timely or complete manner, it will not only cause the collection trolley to quickly reach saturation, affecting the subsequent removal of metal objects, but may also lead to a waste of coal resources, further reducing the power plant's coal utilization rate and economic benefits.

[0005] Therefore, there is an urgent need for a device that can efficiently and automatically separate large metal foreign objects from coal and return the coal to the coal flow, so as to reduce manual intervention and improve the system's automation level and operating efficiency. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a device for separating metal foreign objects and automatically refluxing coal.

[0007] This metal foreign matter separation and automatic coal reflux device includes a coal conveying device and a coal screening device. The coal conveying device includes a rotary impurity remover and a raw coal conveyor belt. The coal screening device includes a permanent magnet drum. The rotary impurity remover has several toothed plates, and the circle formed by the rotation of the toothed plates is tangent to the tail of the raw coal conveyor belt. A coal drop hopper is located below the tail of the raw coal conveyor belt, and an inclined buffer box is located below the rotary impurity remover. An inclined mechanism is located at the bottom of the buffer box, and a reflux conveyor belt is located below the lower end of the buffer box. The drum of the reflux conveyor belt near the coal drop hopper is a permanent magnet drum, and the tail of the reflux conveyor belt extends to the upper side wall of the coal drop hopper.

[0008] Preferably, a tilting mechanism is fixed at each of the four corners of the bottom of the buffer box; the tilting mechanism on the side away from the return conveyor belt is higher than the tilting mechanism on the side closer to the return conveyor belt.

[0009] Preferably, the rotary impurity remover includes a fixed rod, the bottom end of which is fixed to the ground, and a rotating shaft with toothed plates fixed to the top end; the rotary impurity remover has several toothed plates arranged in a circumferential array, one end of which is fixed to the rotating shaft, and the other end is tangent to the tail end of the raw coal conveyor belt.

[0010] Preferably, the coal conveying device includes a dustproof shell; the dustproof shell has connection ports corresponding to the positions of the raw coal conveyor belt and the coal screening device, and a coal drop hopper is connected to the bottom; the projection range of the connection port of the dustproof shell corresponding to the coal screening device is inside the buffer box.

[0011] Preferably, a support frame is placed on the ground below the rotary impurity remover, the tilting mechanism is fixed on the top of the support frame, and a metal foreign object collection box is placed between the bottom of the return conveyor belt and the ground.

[0012] The beneficial effects of this utility model are:

[0013] 1) In this utility model, the permanent magnet roller is combined with the conveyor belt. Through the magnetic force of the permanent magnet roller, various magnetic metal foreign objects can be adsorbed. Through the coordinated work of the permanent magnet roller and the conveyor belt, the metal foreign objects and coal are efficiently separated and the coal is automatically transported to the metal foreign object collection box, thus optimizing the traditional manual screening process.

[0014] 2) In this utility model, the inclined mechanism set at the bottom of the buffer box has a higher height on the side away from the return conveyor belt than on the side close to the return conveyor belt, so that the material can flow smoothly and naturally to the conveyor belt, avoiding material blockage or jamming, and ensuring the stable operation of the equipment.

[0015] 3) This utility model adopts an integrated design. Through an integrated automatic cleaning and reflux mechanism, the separation, reflux and collection of metal foreign objects and coal are fully automated without manual intervention, which improves work efficiency and reduces equipment operating costs. It adopts a compact integrated design, with components such as buffer box, reflux conveyor belt and permanent magnet drum tightly integrated, occupying little space, and is suitable for upgrading and transforming existing coal conveying systems. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a metal foreign matter separation and automatic coal reflux device;

[0017] Figure 2 This is a structural diagram of a coal screening device.

[0018] Explanation of reference numerals in the attached drawings: 1. Rotary impurity remover; 2. Dustproof outer shell; 3. Raw coal conveyor belt; 4. Coal drop hopper; 5. Ground; 6. Coal screening device; 7. Buffer box; 8. Return conveyor belt; 9. Metal foreign object collection box; 10. Inclining mechanism; 11. Permanent magnet drum; 12. Support frame. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0020] Example 1

[0021] As one example, such as Figure 1 As shown, this metal foreign object separation and automatic coal return device includes a coal conveying device and a coal screening device 6. The coal conveying device includes a rotary impurity remover 1 and a raw coal conveyor belt 3. The coal screening device 6 includes a permanent magnet drum 11. The rotary impurity remover 1 is provided with several toothed plates, and the circle formed by the rotation of the toothed plates is tangent to the tail of the raw coal conveyor belt 3. A coal drop hopper 4 is provided below the tail of the raw coal conveyor belt 3, and an inclined buffer box 7 is provided below the rotary impurity remover 1. An inclined mechanism 10 is provided at the bottom of the buffer box 7, and a return conveyor belt 8 is provided below the lower end of the buffer box 7. The drum of the return conveyor belt 8 near the coal drop hopper 4 is a permanent magnet drum 11, and the tail of the return conveyor belt 8 extends to the upper side wall of the coal drop hopper 4.

[0022] The coal conveying device includes a dustproof shell 2; the dustproof shell 2 has connection ports corresponding to the positions of the raw coal conveyor belt 3 and the coal screening device 6, and a coal drop hopper 4 is connected to the bottom; the projection range of the connection port of the dustproof shell 2 corresponding to the coal screening device 6 is inside the buffer box 7.

[0023] The rotary impurity remover 1 includes a fixed rod, the bottom end of which is fixed to the ground 5, and the top end of which is fixed to a rotating shaft with toothed plates. The rotary impurity remover 1 has several toothed plates arranged in a circular array. One end of the toothed plate is fixed to the rotating shaft, and the other end is tangent to the tail of the raw coal conveyor belt 3. The rotating shaft of the rotary impurity remover 1 rotates in the same direction as the drum of the coal conveyor belt 3.

[0024] The material contains metallic foreign objects and coal. During the material collection stage, the material is transported to the coal conveying device via the raw coal conveyor belt 3. The material falls onto the toothed plate of the rotary impurity remover 1 due to inertia and gravity. The toothed plate rotates around the shaft of the rotary impurity remover 1. Most of the coal in the material falls into the coal hopper 4 through the gap between the toothed plates, while the metallic foreign objects and a small amount of coal fall into the buffer box 7.

[0025] Example 2

[0026] As another embodiment, this second embodiment proposes a more specific metal foreign matter separation and automatic coal reflux device based on the first embodiment:

[0027] like Figure 2 As shown, a tilting mechanism 10 is fixed at each of the four corners of the bottom of the buffer box 7; the tilting mechanism 10 on the side away from the return conveyor belt 8 is higher than the tilting mechanism 10 on the side close to the return conveyor belt 8; the tilting mechanism 10 adjusts the falling speed and falling position of the material, providing a smooth transition for subsequent conveying and separation, and avoiding equipment wear or blockage caused by material impact.

[0028] The buffer box 7 is located below the rotary impurity remover 1 and is used to collect the material discharged from the impurity remover to prevent the material from falling directly and to ensure the continuity of subsequent processing. The buffer box 7 can adopt a multi-stage inclined structure to further optimize the material sliding path and ensure smooth transmission of large metal foreign objects and coal. A return conveyor belt 8 is provided below the lower end of the buffer box 7. The roller of the return conveyor belt 8 near the coal drop hopper 4 is a permanent magnet roller 11. A metal foreign object collection box 9 is placed between the bottom of the return conveyor belt 8 and the ground 5.

[0029] The metal foreign object collection box 9 is used to store metal foreign objects separated from the permanent magnet drum 11, preventing them from scattering around the equipment, keeping the site clean and reducing safety hazards. At the same time, the metal foreign object collection box 9 can also prevent metal foreign objects from re-entering the coal combustion or conveying system, ensuring the quality of coal combustion and the safe operation of the conveying equipment. Through the centralized storage of metal foreign objects in the metal foreign object collection box 9, maintenance personnel can regularly empty the metal foreign objects in the box for unified treatment or recycling, reducing on-site workload.

[0030] The permanent magnet drum 11 can be replaced with an electromagnetic drum according to actual needs. By adjusting the electromagnetic intensity, it can adapt to the adsorption requirements of different types of metal foreign objects. A scraper device can be added to the permanent magnet drum 11 to periodically clean up residual metal foreign object fragments and improve the operating efficiency of the equipment.

[0031] During the material conveying stage, the bottom of the buffer box 7 is equipped with an inclined mechanism 10, which allows metal foreign objects and a small amount of coal falling into the buffer box 7 to fall onto the return conveyor belt 8 along the inclined direction.

[0032] During the material separation stage, metal foreign objects and a small amount of coal move along the transmission direction of the return conveyor belt 8. The permanent magnet roller 11 at the end of the return conveyor belt 8 applies magnetic force to the material being conveyed, which can adsorb metal foreign objects. Since the coal is not affected by the magnetic force, it falls directly from the end of the return conveyor belt 8 into the coal hopper 4, thus realizing the return of coal.

[0033] During the metal foreign object recovery stage, when the weight of the metal foreign object is greater than the attraction of the permanent magnet drum 11, the metal foreign object detaches from the permanent magnet drum 11 and falls naturally into the metal foreign object collection box 9 located below.

[0034] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0035] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A device for separating metallic foreign matter and automatically recirculating coal, characterized in that, include: The coal conveying device and the coal screening device are as follows: The coal conveying device includes a rotary impurity remover and a raw coal conveyor belt; The coal screening device includes a permanent magnet drum; The rotary impurity remover is equipped with several toothed plates, and the circle formed by the rotation of the toothed plates is tangent to the tail of the raw coal conveyor belt; A coal drop hopper is provided below the tail of the raw coal conveyor belt, and an inclined buffer box is provided below the rotary impurity remover; An inclined mechanism is provided at the bottom of the buffer box, and a return conveyor belt is provided below the lower end of the buffer box; The drum of the return conveyor belt near the coal drop hopper is a permanent magnet drum, and the tail of the return conveyor belt extends to the upper side wall of the coal drop hopper.

2. The metal foreign matter separation and automatic coal reflux device according to claim 1, characterized in that, Each of the four corners of the bottom of the buffer box is fixed with a tilting mechanism; the tilting mechanism on the side away from the return conveyor belt is higher than the tilting mechanism on the side closer to the return conveyor belt.

3. The metal foreign matter separation and automatic coal reflux device according to claim 1, characterized in that, The rotary impurity remover includes a fixed rod, the bottom of which is fixed to the ground, and a rotating shaft with toothed plates fixed to the top. The rotary impurity remover has several toothed plates arranged in a circumferential array. One end of each toothed plate is fixed to the rotating shaft, and the other end is tangent to the tail of the raw coal conveyor belt.

4. The metal foreign matter separation and automatic coal reflux device according to claim 1, characterized in that, The coal conveying device includes a dustproof shell; the dustproof shell has connection ports corresponding to the positions of the raw coal conveyor belt and the coal screening device, and a coal drop hopper is connected to the bottom; the projection range of the connection port of the dustproof shell corresponding to the coal screening device is inside the buffer box.

5. The metal foreign matter separation and automatic coal reflux device according to claim 1, characterized in that, A support frame is placed on the ground below the rotary impurity remover, and the tilting mechanism is fixed on the top of the support frame. A metal foreign object collection box is placed between the bottom of the return conveyor belt and the ground.

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