Auxiliary device for coal preparation detection

Abstract

The application discloses a kind of auxiliary devices for coal coal preparation detection, it is related to coal coal preparation auxiliary technical field, including buffer tank, the buffer tank top is provided with inlet conveyor belt, the lower side of the buffer tank is provided with discharge conveyor belt, further comprising: buffer mechanism, setting in the buffer tank, screening mechanism, setting at the lower side of the buffer tank, its advantage is that: by the multistage guide plate in buffer tank and the guide roller of active rotation, effectively eliminate coal drop impact force, protect downstream equipment, while avoiding internal blockage;Screening mechanism and transport conveyor belt are directly linked, so that screening operation is completed simultaneously in the coal transfer process, independent screening process is saved, and coal preparation detection efficiency is greatly improved;Compact overall structure, different aperture screening plate can be multistage series configuration, realize multi-granularity continuous screening, significantly simplify operation process and reduce equipment loss.

Description

Technical Field

[0001] This invention relates to the field of coal preparation auxiliary technology, and specifically to an auxiliary device for coal preparation detection. Background Technology

[0002] Coal preparation, also known as coal washing, is a typical application of mineral processing technology in the coal industry. It utilizes the inherent differences in density and surface physicochemical properties between coal and impurities such as gangue. Through physical or physicochemical methods such as heavy media separation, jigging, flotation, and magnetic separation, it processes raw coal mined from the mine through a complete process including crushing, screening, precision separation, dehydration, and drying. This process removes 50%-80% of the ash and 30%-40% of the total sulfur from the raw coal, and eliminates impurities such as gangue and mud. The coal preparation process removes harmful impurities and ultimately separates raw coal into different quality products such as clean coal, middlings, and gangue. Coal preparation screening is a core pretreatment step that connects the preceding and following stages of the entire coal preparation process. By using screens with different aperture sizes, raw coal is accurately divided into multiple particle size grades. This not only removes large pieces of gangue and impurities mixed in the raw coal in advance, reducing the overall ash content of the feed from the source, but also matches the feed with the corresponding particle size range for different subsequent separation processes such as jigging, heavy media, and flotation, greatly improving separation efficiency and accuracy.

[0003] In the operation of existing coal preparation and screening equipment, coal is usually mined and transported first, and then concentrated in one place for screening and testing. This results in coal transportation and screening being carried out in multiple steps, which leads to complicated screening steps and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary device for coal preparation and testing, so as to solve the problem of low efficiency in coal preparation and screening testing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary device for coal preparation and testing, comprising a buffer box, an infeed conveyor belt above the buffer box, and an outfeed conveyor belt on the lower side of the buffer box, further comprising: a buffer mechanism disposed inside the buffer box, the buffer mechanism comprising a plurality of guide plates inclined and fixedly disposed on both sides of the inner wall of the buffer box, a plurality of rotating frames fixedly disposed on the side wall of the buffer box at the ends of the guide plates, and a plurality of guide rollers rotatably disposed inside the buffer box via the plurality of rotating frames; and a screening mechanism disposed below the buffer box, the screening mechanism comprising a screening frame elastically disposed below the buffer box, a screening plate fixedly disposed on the screening frame, and a vibration motor fixedly disposed at one end of the screening frame.

[0006] Furthermore, the buffer mechanism also includes a crushing chamber located inside the rotating frame, and a rotating shaft is fixedly mounted on the guide roller; the guide roller is rotatably mounted inside the rotating frame via the rotating shaft and the crushing chamber.

[0007] Furthermore, the buffer mechanism also includes a plurality of drive motors fixedly disposed on the side wall of the buffer box, and the plurality of drive motors are correspondingly disposed with the plurality of rotating frames; the output end of the drive motor is fixedly disposed with one end of the rotating shaft, and a mounting bracket is fixedly disposed on the drive motor, and the drive motor is fixedly mounted on the side wall of the buffer box through the mounting bracket.

[0008] Furthermore, a number of crushing teeth are fixedly provided on the side wall of the guide roller.

[0009] Furthermore, several of the guide plates are arranged alternately and sequentially on both sides of the inner wall of the buffer box.

[0010] Furthermore, a feed inlet is fixedly installed on the top of the buffer box, and several support frames are fixedly installed on the side wall of the buffer box.

[0011] Furthermore, the screening mechanism also includes several support frames 2 fixedly installed on the side wall of the screening frame, and each of the several support frames 2 is fixedly equipped with a spring.

[0012] Furthermore, the screening mechanism also includes a feeding plate fixedly disposed at one end of the screening frame; a guide conveyor belt is fixedly disposed below the screening frame.

[0013] Compared with existing technologies, the present invention provides an auxiliary device for coal preparation and testing. Raw coal is conveyed by a feed conveyor belt and falls into a buffer box. Guide plates, alternately arranged along both sides of the inner wall, buffer the falling coal in stages. Simultaneously, guide rollers rotate to prevent blockage at the ends of the guide plates. The coal is then discharged from the bottom of the buffer box onto a screening plate on a screening frame. A vibrating motor drives the screening frame to vibrate elastically, allowing fine coal particles to pass through the screening plate and fall onto the feed conveyor belt for transport. Unscreened coarse coal is guided to the discharge conveyor belt for output. Its advantages are: the multi-stage guide plates and actively rotating guide rollers within the buffer box effectively dissipate the impact of falling coal, protecting downstream equipment and preventing internal blockage; the screening mechanism is directly connected to the conveyor belt, allowing screening to be completed simultaneously during coal transfer, eliminating the need for a separate screening process and significantly improving coal preparation and testing efficiency; the overall structure is compact, allowing for multi-stage series configuration of screening plates with different apertures to achieve continuous screening of multiple particle sizes, significantly simplifying the operation process and reducing equipment wear. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the coal mine coal preparation and screening auxiliary device provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the position structure of the buffer box screening frame provided in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the position structure of the rotating frame and the vibration motor provided in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the buffer box provided in an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the guide roller drive structure provided in an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the screening rack structure provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Buffer box; 2. Screening frame; 3. Feed conveyor belt; 4. Guide conveyor belt; 5. Discharge conveyor belt; 6. Feed inlet; 7. Rotating frame; 8. Drive motor; 9. Support frame one; 10. Spring; 11. Support frame two; 12. Vibrating motor; 13. Guide roller; 14. Crushing chamber; 15. Guide plate; 16. Rotating shaft; 17. Crushing teeth; 18. Mounting frame; 19. Screening plate; 20. Feeding plate. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] As attached Figure 1 To be continued Figure 6 As shown:

[0025] Example 1:

[0026] This invention provides an auxiliary device for coal preparation and testing, including a buffer box 1, an infeed conveyor belt 3 above the buffer box 1, and an outfeed conveyor belt 5 on the lower side of the buffer box 1. It also includes: a buffer mechanism disposed inside the buffer box 1, comprising several guide plates 15 inclinedly fixed on both sides of the inner wall of the buffer box 1, several rotating frames 7 fixedly disposed on the side wall of the buffer box 1 at the ends of the guide plates 15, and several guide rollers 13 rotatably disposed inside the buffer box 1 via the rotating frames 7; and a screening mechanism disposed below the buffer box 1, comprising a screening frame 2 elastically disposed below the buffer box 1, a screening plate 19 fixedly disposed on the screening frame 2, and a vibration motor 12 fixedly disposed at one end of the screening frame 2.

[0027] Meanwhile, raw coal is conveyed by the feed conveyor belt 3 and falls into the buffer box 1 through the feed inlet 6. The guide plates 15, which are alternately arranged on both sides of the inner wall, buffer the coal as it falls. At the same time, the drive motor 8 drives the guide roller 13 and the crushing teeth 17 to rotate, preventing the end of the guide plate 15 from being blocked and crushing the coal falling into the crushing chamber 14. Then, the coal is discharged from the bottom of the buffer box 1 to the screening plate 19 on the screening frame 2. The vibration motor 12 drives the screening frame 2 to vibrate elastically through the support frame 11 and the spring 10, so that the fine coal particles pass through the screening plate 19 and fall onto the guide conveyor belt 4 for transportation. The coarse coal that has not been screened is fed into the discharge conveyor belt 5 through the feeding plate 20 for output. Its advantages are as follows: the multi-stage guide plates 15 and the actively rotating guide rollers 13 in the buffer box 1 effectively dissipate the impact force of falling coal, protect downstream equipment, and avoid internal blockage; the screening mechanism is directly connected to the conveyor belt, so that the screening operation is completed simultaneously during the coal transfer process, eliminating the need for an independent screening process and greatly improving the efficiency of coal preparation and testing; the overall structure is compact, and different aperture screen plates 19 can be configured in series in multiple stages to achieve continuous screening of multiple particle sizes, which significantly simplifies the operation process and reduces equipment wear.

[0028] Example 2:

[0029] refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The buffer mechanism includes a buffer box 1, a feed inlet 6, a rotating frame 7, a drive motor 8, a guide roller 13, crushing teeth 17, and a guide plate 15.

[0030] By setting up a buffer box 1, the buffer box 1 can be easily installed and used by several support frames 9. A feeding conveyor belt 3 is fixedly connected above the buffer box 1, so that when the coal is being transported, it can be transported out by the feeding conveyor belt 3. When it is necessary to change the transport direction of the coal, the buffer box 1 can be set below one end of the feeding conveyor belt 3, so that the coal on the feeding conveyor belt 3 falls into the buffer box 1 first, is buffered by the buffer box 1, and then falls out from the bottom of the buffer box 1, thereby changing the transport direction of the coal. A feed inlet 6 is fixedly installed on the top of the buffer box 1, so that the feed inlet 6 can increase the opening size of the top of the buffer box 1, thereby facilitating the introduction of the coal conveyed by the feeding conveyor belt 3 into the interior of the buffer box 1 through the feed inlet 6.

[0031] Meanwhile, several guide plates 15 are fixedly installed on both sides of the inner wall of the buffer box 1. Several guide plates 15 are installed at an angle downwards. The guide plates 15 are arranged opposite to each other and alternately on both sides of the inner wall of the buffer box 1. After the coal on the feed conveyor belt 3 is introduced into the interior of the buffer box 1 through the feed inlet 6, the several guide plates 15 inside the buffer box 1 will buffer and guide the coal in turn, thereby offsetting the impact force of the coal and preventing the impact force of the coal falling from being too large. Finally, the coal is discharged and transported from the bottom of the buffer box 1.

[0032] Secondly, several rotating frames 7 are fixedly installed on the side wall of the buffer box 1, and the installation positions of the several rotating frames 7 are set at the ends of several discharge conveyor belts 5. A crushing chamber 14 is opened inside each of the several rotating frames 7, so that the buffer box 1 is rotatably connected to several guide rollers 13 through the several rotating frames 7 and the crushing chamber 14, and several crushing teeth 17 are fixedly connected to the several guide rollers 13. When the buffer box 1 is buffered and guided by several guide plates 15, the several guide rollers 13 will rotate inside the buffer box 1 to prevent coal from clogging at the ends of the guide plates 15. The crushing chamber 14 is reinforced, and the coal falling into the crushing chamber 14 will also be crushed by the rotation of the guide rollers 13 and the several crushing teeth 17 before being discharged, thereby avoiding the situation of coal clogging in the buffer box 1.

[0033] In addition, a rotating shaft 16 is fixedly connected to the guide roller 13, so that the guide roller 13 can be rotatably connected to the crushing chamber 14 through the rotating shaft 16. One end of the rotating shaft 16 extends through to the outside of the rotating frame 7. A drive motor 8 is installed on the side wall of the buffer box 1 at the end of the rotating frame 7. One end of the rotating shaft 16 is fixedly connected to the output end of the drive motor 8, so that the drive motor 8 can drive the rotating shaft 16, the guide roller 13 and several crushing teeth 17 to rotate in the buffer box 1 and the crushing chamber 14, thereby preventing the problem of guide blockage inside the buffer box 1. A mounting bracket 18 is also fixedly installed on the drive motor 8, so that the drive motor 8 can be fixedly installed on the side wall of the buffer box 1 through the mounting bracket 18 during use.

[0034] Example 3:

[0035] refer to Figure 1 , Figure 3 and Figure 6 The screening mechanism includes a screening frame 2, a guide conveyor belt 4, a discharge conveyor belt 5, a vibrating motor 12, a support frame 11, a spring 10, and a screening plate 19.

[0036] By elastically installing a screening frame 2 at the bottom of the buffer box 1, and fixing a screening plate 19 on the screening frame 2, the coal is buffered by the buffer box 1 and then discharged from the bottom onto the screening plate 19 installed on the screening frame 2. A vibration motor 12 is fixedly installed at one end of the screening frame 2, so that the vibration motor 12 can vibrate the screening frame 2 and the screening plate 19, thereby facilitating the vibration screening of the coal by the screening plate 19. Several support frames 2 11 are also fixedly installed on the side wall of the screening frame 2, and springs 10 are fixedly installed on each of the several support frames 2 11, thereby facilitating the elastic installation and use of the screening frame 2 through the several support frames 2 11 and the springs 10.

[0037] Meanwhile, a guide conveyor belt 4 is fixedly installed below the screening frame 2, so that the coal falling onto the screening frame 2 can be screened by the screening plate 19 and then transported on the guide conveyor belt 4. A feeding plate 20 is fixedly connected to the other end of the screening frame 2, so that the coal that the screening plate 19 cannot screen will be discharged through the feeding plate 20. On the side of the screening frame 2, below the screening plate 19, a discharge conveyor belt 5 is fixedly installed, so that the coal discharged by the feeding plate 20 will be transported through the discharge conveyor belt 5. This facilitates the screening and coal selection work of coal during the coal transportation process, which greatly improves the efficiency of coal selection auxiliary detection.

[0038] In addition, multiple buffer boxes 1 and screening frames 2 can be set, and by setting the aperture size of the screening plates 19 on multiple screening frames 2, the screening and coal preparation work of coal with different diameters can be completed. By setting multiple buffer boxes 1 and screening frames 2, multi-stage coal screening can be completed during the coal transportation process. In addition, with the buffering function of the buffer box 1, it can not only avoid impact damage to the feed conveyor belt 3, guide conveyor belt 4 and discharge conveyor belt 5, but also improve the convenience and efficiency of coal preparation and screening work.

[0039] Working principle: First, the entire device is securely installed on the coal preparation and transportation line using support frame 1 9 and support frame 2 11, aligning the discharge end of the feed conveyor belt 3 with the feed inlet 6 at the top of the buffer box 1. Simultaneously, the guide conveyor belt 4 and the discharge conveyor belt 5 are connected to the subsequent transportation or storage stages. After starting the equipment, the drive motor 8 is fixed to the side wall of the buffer box 1 via the mounting frame 18, and drives the rotating shaft 16 to continuously rotate the guide roller 13 and its surface crushing teeth 17 within the crushing chamber 14 inside the rotating frame 7. Simultaneously, the vibrating motor 12 starts, causing the screening frame 2 to vibrate at high frequency under the elastic support of the spring 10. Raw coal is continuously conveyed by the feed conveyor belt 3 and falls into the buffer box 1 from the feed inlet 6. It first impacts the uppermost guide plate 15. Since the guide plates 15 are arranged in a downward, alternating, opposite manner on both sides of the inner wall of the buffer box 1, the raw coal slides along the first guide plate 15 to the second guide plate 15 on the opposite side under the influence of gravity. This process is repeated, with the coal passing through multiple levels of guide plates 15 for obstruction and guidance, gradually offsetting the impact force and significantly reducing the speed. During this process, each guide plate 15 has a corresponding rotating frame 7 and guide roller 13 at its end. The rotating guide roller 13 and its crushing teeth 17 continuously move the coal, preventing coal from accumulating and clogging at the ends of the guide plates 15. Simultaneously, a small amount of crushed coal or pulverized coal falling into the crushing chamber 14 is further ground and refined by the rollers and teeth before being discharged with the main material. After sufficient buffering, the coal is smoothly discharged from the bottom of the buffer box 1 and falls directly onto the screening plate 19 fixed to the screening frame 2 below. Under the excitation force of the vibrating motor 12, the screening frame 2, together with the screening plate 19, vibrates regularly, causing the coal to spread evenly and undergo particle size separation: fine coal particles smaller than the screen aperture size pass through the screening plate 19 and fall onto the conveyor belt 4 below, which transports them to the next process; while coarse coal particles or gangue larger than the screen aperture size move towards the end along the inclined screening plate 19, are guided by the feeding plate 20 fixed to one end of the screening frame 2, and slide onto the discharge conveyor belt 5 located on the side below the buffer box 1, which transports them to a station for further processing or crushing. The entire screening process is continuous, and the guide plate 15 and guide roller 13 inside the buffer box 1 work continuously to ensure that the upstream material flows continuously without blockage. To achieve multi-stage particle size screening, multiple devices with the same structure but different apertures of the screening plates 19 can be installed in series downstream. The discharge conveyor belt 5 or the guide conveyor belt 4 of the previous device will send the material into the next-stage buffer box 1, thus forming a multi-stage grading screening chain. Finally, the entire process from coarse crushing and buffering to fine screening is completed simultaneously during coal transportation. There is no need to set up an additional independent screening workshop or transfer yard, which significantly simplifies the operation steps and improves the overall efficiency of coal preparation and testing.

[0040] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An auxiliary device for coal preparation and testing, comprising a buffer box (1), wherein an infeed conveyor belt (3) is disposed above the buffer box (1), and an outfeed conveyor belt (5) is disposed on the lower side of the buffer box (1), characterized in that, Also includes: A buffer mechanism is provided inside the buffer box (1). The buffer mechanism includes several guide plates (15) that are inclined and fixedly provided on both sides of the inner wall of the buffer box (1). Several rotating frames (7) are fixedly provided on the side wall of the buffer box (1) at the ends of the guide plates (15). Several guide rollers (13) are rotatably provided inside the buffer box (1) through several rotating frames (7). The screening mechanism is located below the buffer box (1). The screening mechanism includes a screening frame (2) that is elastically set below the buffer box (1). A screening plate (19) is fixedly set on the screening frame (2), and a vibration motor (12) is fixedly set at one end of the screening frame (2).

2. The auxiliary device for coal preparation and testing according to claim 1, characterized in that, The buffer mechanism also includes a crushing chamber (14) opened inside the rotating frame (7), and a rotating shaft (16) is fixedly installed on the guide roller (13). The guide roller (13) is rotatably mounted inside the rotating frame (7) via the rotating shaft (16) and the crushing chamber (14).

3. The auxiliary device for coal preparation and testing according to claim 2, characterized in that, The buffer mechanism also includes a number of drive motors (8) fixedly installed on the side wall of the buffer box (1), and the number of drive motors (8) are correspondingly arranged with the number of rotating frames (7); The output end of the drive motor (8) is fixedly connected to one end of the rotating shaft (16). A mounting bracket (18) is fixedly installed on the drive motor (8). The drive motor (8) is fixedly installed on the side wall of the buffer box (1) through the mounting bracket (18).

4. The auxiliary device for coal preparation and testing according to claim 1, characterized in that, The side wall of the guide roller (13) is fixedly provided with several crushing teeth (17).

5. The auxiliary device for coal preparation and testing according to claim 1, characterized in that, Several of the guide plates (15) are arranged alternately on both sides of the inner wall of the buffer box (1).

6. The auxiliary device for coal preparation and testing according to claim 1, characterized in that, The buffer box (1) has a feed inlet (6) fixedly installed on the top, and several support frames (9) are fixedly installed on the side wall of the buffer box (1).

7. The auxiliary device for coal preparation and testing according to claim 1, characterized in that, The screening mechanism also includes several support frames (11) fixedly installed on the side wall of the screening frame (2), and each of the several support frames (11) is fixedly provided with a spring (10).

8. The auxiliary device for coal preparation and testing according to claim 1, characterized in that, The screening mechanism also includes a feeding plate (20) fixedly disposed at one end of the screening frame (2); A material conveyor belt (4) is fixedly installed below the screening frame (2).

Images