Anti-blocking discharge mechanism of jigging coal washer

Abstract

The utility model discloses a kind of anti-blocking discharge mechanism of jigging coal washer, belong to coal washing equipment technical field.Aiming at the problem that the existing jigging coal washer discharge mechanism is easy to be blocked due to material granularity difference, high-viscosity coal slime adhesion and structural design defects, affecting the continuity and stability of discharging, the anti-blocking discharge mechanism increases auxiliary passage, auxiliary material wheel on the existing equipment and discharging device, and sets up slide and sieve plate in staggered arrangement in discharging passage, sieve net is equipped in the junction of auxiliary passage and discharging passage, auxiliary material wheel and discharging wheel are driven by sprocket chain, and cylinder pushing mechanism and flushing nozzle can be additionally provided.The utility model realizes the shunt discharge of different granularity materials by grading discharge, active cleaning and intelligent control, effectively avoids blocking, reduces downtime maintenance, and improves discharging efficiency and equipment stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal washing equipment, specifically relating to an anti-clogging discharge mechanism for a jigging coal washing machine. Background Technology

[0002] In the field of deep coal processing, the coal washing process mainly aims to reduce transportation costs and improve coal utilization by removing impurities from raw coal and classifying it. Therefore, the operating efficiency of coal washing equipment is crucial. Fully automated coal washing machines are widely used in the industry due to their high degree of automation and precise sorting. Taking the common SKT series fully automated jig coal washing machine as an example, this equipment achieves stratified sorting based on density differences in materials within a vertical pulsating water flow. After raw coal enters the jig from the inlet, under the action of the pulsating water flow, the denser gangue sinks to the bottom layer and is distributed in the gangue section; the less dense middlings are in the middle layer; and the less dense clean coal floats to the top layer. After stratification, the gangue is discharged at the end of the section, and some small gangue particles are discharged through the screen. Middlings and clean coal enter subsequent sections for further stratification. Middlings are discharged from the corresponding discharge channel, while clean coal is transported by water from the overflow outlet to the dewatering screen, thus achieving the separation of raw coal into gangue, middlings, and clean coal.

[0003] However, the discharge process of jigging coal washing machines has long suffered from numerous problems, severely restricting the overall performance and production efficiency of the equipment. On the one hand, during the discharge process, materials are prone to jamming due to differences in particle size and shape, especially when processing large, irregularly shaped gangue, whose sharp edges intersect, severely hindering smooth discharge. On the other hand, when processing high-viscosity coal slime, the slime easily adheres to the inner wall of the discharge pipe, gradually accumulating over time and eventually causing blockage. In addition, the existing discharge structure design has significant flaws: the discharge port size is mismatched with the material characteristics, and the narrow discharge port becomes a bottleneck for the discharge of large particles; the discharge wheel is too long and the cross-sectional area is too small, causing frequent jamming of large particles, greatly affecting the continuity and stability of discharge.

[0004] The existing jigging coal washing machine's discharge mechanism has significant shortcomings in responding to changes in material characteristics and ensuring smooth discharge. There is an urgent need to redesign a new anti-clogging discharge mechanism. Through innovative structural design and the addition of auxiliary discharge and cleaning devices, the mechanism can achieve efficient graded processing and real-time unblocking of materials, effectively avoid clogging, and comprehensively improve the operating efficiency and stability of the jigging coal washing machine. Utility Model Content

[0005] This utility model relates to an anti-clogging discharge mechanism for a jigging coal washing machine, which aims to solve the problem of easy clogging in existing discharge mechanisms and improve discharge efficiency and stability.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: The anti-clogging discharge mechanism includes a discharge device, which comprises a motor and a reducer mounted on a frame support. A discharge wheel is mounted on the lower body and located at the outlet of the discharge channel. The motor output shaft is connected to the reducer input shaft, and the reducer output shaft is connected to the discharge wheel's rotating shaft via a coupling. It also includes an auxiliary wheel mounted on the lower body, located at the outlet of an auxiliary channel. The auxiliary channel is connected to the discharge channel, and a screen is installed at the connection point. The screen is located within the discharge channel, and the rotating shafts of the auxiliary wheel and the discharge wheel are connected via a sprocket and chain drive.

[0007] As a further supplement to the above technical solution, multiple sets of chute plates and screen plates are staggered in the discharge channel. The aperture of the screen plate is larger than that of the screen mesh. The chute plates and screen plates are staggered and are arranged downwards and above the screen mesh.

[0008] As a further supplement to the above technical solution, the connection port of the auxiliary channel is directly opposite the observation hole, and a cylinder is installed on the observation hole. A pusher plate is installed at the end of the piston rod of the cylinder. The pusher plate is located inside the observation hole, and its bottom is in contact with the surface of the screen.

[0009] As a further explanation and limitation of the above technical solution, a pulley is provided on the pusher plate, and the pulley is in contact with the inner wall of the observation hole.

[0010] As a further supplement to the above technical solution, multiple flushing nozzles are arranged side by side on the inner wall of the lower machine body. The flushing nozzles are located to the lower left of the discharge wheel. The flushing nozzles are connected to a high-pressure water source through a solenoid valve and are used to periodically flush the rotating discharge wheel.

[0011] As a further explanation and limitation of the above technical solution, the auxiliary channel is divided into three parts: a wide-mouth connecting section, an inclined shrinking section, and a vertical shrinking section. The auxiliary material wheel is installed in the vertical shrinking section, and the port of the vertical shrinking section is fixed to the inner wall of the lower machine body by a bracket.

[0012] As a further supplement to the above technical solution, a baffle plate is fixedly connected to the inner wall of the lower machine body. The baffle plate is located on the right side of the discharge wheel, and its upper end is fixed to the discharge channel, and its lower end is fixed to the bracket. Both ends of the baffle plate extend to the inner wall of the lower machine body.

[0013] As a further explanation of the above technical solution, multiple baffles are axially arranged on the discharge wheel, which divide the discharge wheel into several independent compartments to improve discharge efficiency.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This utility model achieves graded discharge by setting up a chute, sieve plate, and sieve screen in the discharge channel, in conjunction with an auxiliary channel and auxiliary material wheel, effectively solving the clogging problem caused by uneven particle size. Furthermore, the partition on the discharge wheel separates independent compartments, expanding the material flow cross-section and avoiding the jamming phenomenon caused by insufficient material flow cross-section in traditional discharge wheels. This further improves the smoothness and stability of discharge, reduces equipment downtime caused by blockages, and increases production efficiency.

[0016] 2. This utility model utilizes the existing observation hole at the screen to set up a cylinder pushing mechanism. When the material level sensor detects that the material accumulation has reached the preset value, the pushing plate can promptly clean the accumulated material on the screen surface to prevent screen blockage. At the same time, the flushing nozzle on the inner wall of the lower machine body can periodically perform high-pressure flushing on the discharge wheel to remove the coal sludge adhering to the surface. This solves the problem of long-term adhesion of high-viscosity coal sludge causing pipe blockage, reduces the frequency and difficulty of manual cleaning, reduces maintenance costs, and ensures the efficient operation of the equipment.

[0017] 3. This utility model, through the linkage of pressure sensor and PLC control system, can dynamically adjust motor speed according to discharge resistance, ensuring smooth discharge while reducing energy waste; the three-section structure design of auxiliary channel is adapted to the conveying characteristics of large particles, reducing kinetic energy loss during material conveying; the setting of baffle plate avoids waste and equipment wear caused by material scattering, solves the problem of mismatch between traditional discharge structure and material characteristics and serious energy waste, and comprehensively improves the production efficiency and energy saving of coal washing equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the modified discharge device in this utility model;

[0019] Figure 2 This is a schematic diagram of the anti-clogging discharge mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the three-section structure of the auxiliary channel in this utility model;

[0021] Figure 4 This is a schematic diagram of the material discharge wheel in this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the jigging coal washing machine in this utility model.

[0023] In the diagram: 1 is the frame support, 2 is the motor, 3 is the reducer, 4 is the sprocket and chain, 5 is the discharge wheel, 6 is the auxiliary wheel, 7 is the discharge channel, 8 is the auxiliary channel, 9 is the chute, 10 is the screen plate, 11 is the screen mesh, 12 is the cylinder, 13 is the pusher plate, 14 is the pulley, 15 is the flushing nozzle, 16 is the bracket, 17 is the baffle plate, and 18 is the partition plate.

[0024] The auxiliary channel structure is divided into the following three sections: the wide-mouth connecting section is 801, the oblique contraction section is 802, and the vertical contraction section is 803. Detailed Implementation

[0025] To further illustrate the technical solution of this utility model, the following description is in conjunction with the appendix. Figure 1-5 Based on the actual modification scheme, we will further illustrate this utility model through three embodiments. Example 1

[0026] like Figure 1 As shown, the discharge device of the existing jig-type coal washing machine includes a frame support 1, which is fixed to the side of the lower body of the coal washing machine by expansion bolts. A motor 2 and a reducer 3 are bolted onto the frame support 1. The output shaft of the motor 2 is connected to the input shaft of the reducer 3 via a key, and the output shaft of the reducer 3 is rigidly connected to the rotating shaft of the discharge wheel 5 via a flexible coupling. The discharge wheel 5 is mounted on the lower body via a bearing housing and is located at the outlet of the discharge channel 7.

[0027] This anti-clogging material discharge mechanism mainly utilizes the spare space in the lower body of the existing equipment to add an auxiliary channel 8 and an auxiliary material wheel 6. (See attached image) Figure 1-5As shown, the specific modification scheme is as follows: The auxiliary channel 8 is composed of a wide-mouth connecting section 801, an inclined contraction section 802, and a vertical contraction section 803 welded together in sequence. An opening is made in the side wall of the discharge channel 7, and the wide-mouth connecting section 801 is directly welded at the opening. Simultaneously, the vertical contraction section 803 is fixed to the lower machine body via a bracket 16. The two ends of the shaft of the auxiliary material wheel 6 pass through the vertical contraction section 803 and are mounted on the lower machine body via bearings. The shaft of the auxiliary material wheel 6 is driven by a sprocket and chain 4 meshing with the shaft of the discharge wheel 5. A screen 11 is fixed at the connection between the auxiliary channel 8 and the discharge channel 7, with the edge of the screen 11 fitting against the inner wall of the discharge channel 7. In addition, at least two sets of chute 9 and screen 10 are staggered in the discharge channel 7. The chute 9 and screen 10 are located above the screen 11 and are arranged at a downward 30° angle to the surface of the discharge channel 7. They are welded to the inner wall of the discharge channel 7 and leave space for the material to flow. After the screened material passes through the screen 10, larger particles are sent to the auxiliary channel 8 through the bottom chute 9. A baffle 17 is fixed to the inner wall of the lower machine body. The baffle 17 is located on the right side of the discharge wheel 5. Its upper end is welded to the outer wall of the discharge channel 7, and its lower end is fixed to the bracket 16. Both ends of the baffle 17 extend to the inner wall of the lower machine body and are welded to it. Three partitions 18 are welded axially on the discharge wheel 5. The height of the partitions 18 is most suitable to be 1 / 5 of the diameter of the discharge wheel 5, dividing each section of the discharge wheel 5 into four independent areas.

[0028] In this embodiment, the screen 11 is made of 304 stainless steel with a mesh size of 20; the screen plate 10 is made of Q235 material with a thickness of 10mm and an aperture of 12mm. The motor 2 is connected to the output terminal of the contactor in the existing control cabinet of the coal washing machine via a cable, and the input terminal of the contactor is connected to a 380V three-phase power supply. The PLC in the control cabinet is connected to a pressure sensor on the inner wall of the discharge channel 7 via a signal line. The pressure sensor detects the discharge resistance. When the pressure exceeds 0.5MPa, the PLC transmits a signal to the frequency converter in the control cabinet, which controls the motor 2 to increase its speed by 15% to cope with changes in discharge pressure and ensure smooth discharge. Example 2

[0029] During long-term use, larger particles of material tend to splash and accumulate on the screen when entering the auxiliary channel, thus affecting the passage efficiency of finer materials. Therefore, based on Example 1, while retaining the inspection port, a cylinder-driven material pushing mechanism is added using the existing observation hole, as shown in the attached diagram. Figure 2 As shown, the specific modification scheme is as follows: The wide-mouth connecting section 801 of the auxiliary channel 8 is directly opposite the observation hole reserved in the original lower body. A cylinder 12 is installed on the cover plate of the observation hole. The piston rod end of the cylinder 12 is connected to the pusher plate 13 by a thread. The pusher plate 13 is located inside the observation hole, and its bottom is in contact with the surface of the screen 11. The upper and lower sides of the pusher plate 13 are equipped with pulleys 14 through bearings. The pulleys 14 slide in contact with the inner wall of the observation hole.

[0030] In this embodiment, the air inlet and outlet of cylinder 12 are connected to a solenoid valve via a PU tube. The air inlet of the solenoid valve is connected to the existing compressed air pipeline of the coal washing machine via a PU tube, with a pressure gauge and a filter connected in series in the pipeline. The solenoid valve is connected to the digital output module of the PLC via a cable, and the material level sensor installed above the screen 11 is connected to the digital input module of the PLC via a signal line. When the material level sensor detects that the material accumulation thickness on the screen 11 reaches a preset value, the PLC controls the solenoid valve to switch, the piston rod of cylinder 12 extends to clean the material on the surface of the screen 11, and then the piston rod returns to its original position. Example 3

[0031] When a coal washing machine processes high-viscosity coal slime, the slime tends to adhere to the surface of the discharge wheel, and long-term accumulation can affect the operation of the discharge wheel and the discharge efficiency. Therefore, based on Example 1, a flushing mechanism is added, such as... Figure 2 As shown, the specific modification scheme is as follows: Four flushing nozzles 15 are installed side by side on the inner wall of the lower machine body. The flushing nozzles 15 are connected in series via stainless steel pipes, and the main pipeline is connected to the original high-pressure water pipeline of the coal washing machine via stainless steel pipes. The pipeline between the solenoid valve and the nozzle is fixed to the inner wall of the lower machine body with pipe clamps. The solenoid valve is connected to the timer control module of the PLC via a cable. The PLC is preset to start the flushing program every 30 minutes. In this embodiment, the spray angle is 60°, and the flushing nozzle 15 is located 200mm to the lower left of the discharge wheel 5, with the nozzle axis forming a 45° angle with the tangent direction of the discharge wheel 5. When started, the solenoid valve is energized and opened, and high-pressure water is sprayed onto the surface of the discharge wheel 5 through the flushing nozzle 15. At the same time, the PLC controls the speed of the motor 2 to drop to 60% of the rated speed to avoid water splashing. The high-pressure water flow effectively removes the material attached to the surface of the discharge wheel, preventing material accumulation from affecting operation and improving the cleanliness of the equipment. After flushing, the PLC controls the motor to return to its original speed to ensure stable discharge efficiency.

[0032] Its working principle is as follows: After the washed material enters the discharge channel 7, it is guided by the chute 9 to the screen plate 10 for preliminary separation. Fine particles are screened again through the screen mesh 11 and fall into the discharge channel 7, then slide towards the discharge wheel 5 and are pushed out by the independent compartments separated by the partition 18. Larger particles enter the auxiliary channel 8 and are pushed to the outlet by the auxiliary wheel 6, achieving graded discharge, reducing mutual blockage, and improving discharge efficiency. When the screen mesh 11 is blocked by the accumulation of larger particles, the material level sensor triggers the cylinder 12 to act, and the pusher plate 13 pushes the material accumulated on the surface of the screen mesh 11 into the auxiliary channel 8 to avoid blockage of the screen mesh 11. At the same time, the flushing nozzle 15 is activated periodically, and high-pressure water removes the coal slime adhering to the surface of the discharge wheel 5 to prevent coal slime from agglomerating and affecting the discharge, while also reducing the frictional resistance between the discharge wheel 5 and the material.

[0033] The foregoing has shown and described the main features and advantages of this utility model. It will be apparent to those skilled in the art that the specific embodiments of this utility model are not limited to the details of the exemplary embodiments described above. Furthermore, without departing from the spirit or essential characteristics of this utility model, the inventive concept and design ideas of this utility model can be implemented in other specific forms, and these should be equivalently included within the protection scope disclosed in the technical solution of this utility model. Therefore, in all respects, the embodiments should be considered exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included within this utility model.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clogging-proof discharge mechanism for a jigging coal washing machine, comprising a discharge device including a motor (2) and a reducer (3) mounted on a frame support (1), a discharge wheel (5) mounted on the lower body and located at the outlet of the discharge channel (7), the output shaft of the motor (2) being connected to the input shaft of the reducer (3), and its output shaft being connected to the rotating shaft of the discharge wheel (5) via a coupling, characterized in that: It also includes an auxiliary material wheel (6) installed on the lower body, which is located at the outlet of the auxiliary channel (8). The auxiliary channel (8) is connected to the discharge channel (7), and a screen (11) is installed at the connection. The screen (11) is located inside the discharge channel (7). The shaft between the auxiliary material wheel (6) and the discharge wheel (5) is connected by a sprocket chain (4).

2. The anti-clogging discharge mechanism of a jig-type coal washing machine according to claim 1, characterized in that: Multiple sets of chute (9) and screen (10) are staggered in the discharge channel (7). The aperture of the screen (10) is larger than that of the screen (11). The chute (9) and screen (10) are staggered and are arranged downwardly and above the screen (11).

3. The anti-clogging discharge mechanism of a jigging coal washing machine according to claim 1, characterized in that: The connection port of the auxiliary channel (8) is directly opposite the observation hole, and a cylinder (12) is installed on the observation hole. A pusher plate (13) is installed at the end of the piston rod of the cylinder (12). The pusher plate (13) is located inside the observation hole, and its bottom is in contact with the surface of the screen (11).

4. The anti-clogging discharge mechanism of a jigging coal washing machine according to claim 3, characterized in that: A pulley (14) is provided on the pusher plate (13), and the pulley (14) is in contact with the inner wall of the observation hole.

5. The anti-clogging discharge mechanism of a jig-type coal washing machine according to any one of claims 1 to 4, characterized in that: Multiple flushing nozzles (15) are arranged side by side on the inner wall of the lower machine body. The flushing nozzles (15) are located to the lower left of the discharge wheel (5). The flushing nozzles (15) are connected to a high-pressure water source through a solenoid valve and are used to periodically flush the discharge wheel (5) that rotates back.

6. The anti-clogging discharge mechanism of a jigging coal washing machine according to claim 5, characterized in that: The auxiliary channel (8) is divided into three parts: a wide-mouth connecting section (801), an inclined shrinking section (802), and a vertical shrinking section (803). The auxiliary material wheel (6) is installed in the vertical shrinking section (803), and the port of the vertical shrinking section (803) is fixed to the inner wall of the lower machine body by a bracket (16).

7. The anti-clogging discharge mechanism of a jigging coal washing machine according to claim 6, characterized in that: A baffle plate (17) is fixedly connected to the inner wall of the lower machine body. The baffle plate (17) is located on the right side of the discharge wheel (5), and its upper end is fixed on the discharge channel (7), and its lower end is fixed on the bracket (16). Both ends of the baffle plate (17) extend to the inner wall of the lower machine body.

8. The anti-clogging discharge mechanism of a jig-type coal washing machine according to claim 6 or 7, characterized in that: Multiple partitions (18) are axially arranged on the discharge wheel (5), which divide the discharge wheel (5) into several independent compartments to improve discharge efficiency.

Images