A vertical blade coal slime centrifuge

Abstract

This utility model relates to a vertical scraper coal slime centrifuge in the field of mining machinery. It includes a frame, a tank fixedly connected to the frame, and a tank cover connected to the upper opening of the tank. It also includes: a centrifugal filter barrel rotatably connected to the tank, with the discharge end of the filter barrel penetrating downwards through the tank and frame; a drive mechanism for rotating the filter barrel, mounted on the frame; a hollow shaft motor fixedly mounted on the tank cover; and a hollow shaft fixedly connected to the hollow shaft motor, with its lower end extending into the tank. The upper end of the hollow shaft is connected to an external conveying pipe via a rotary joint. Using this structure, during the coal scraping stage, the scraper gradually approaches the tank wall to scrape the material, gradually removing the coal layer, reducing coal blockage, effectively preventing blockage at the discharge end, and ensuring continuous and smooth discharge.

Description

Technical Field

[0001] This utility model relates to a vertical scraper coal slime centrifuge, and more particularly to a vertical scraper coal slime centrifuge applied in the field of mining machinery technology. Background Technology

[0002] In coal washing and processing, the vertical scraper coal slime centrifuge is a key piece of equipment for coal slime dewatering and recycling. Its basic working principle is to use centrifugal force to make solid particles in coal slime adhere to the inner wall of the centrifugal filter barrel, and the liquid passes through the filter barrel for separation. The solid material is then scraped off by a scraper to complete the unloading. It is widely used in coal slime recycling and coal slime water purification processes in coal preparation plants, and is of great significance for improving the utilization rate of coal resources and reducing environmental pollution.

[0003] However, in actual operation, traditional vertical scraper coal slime centrifuges often have direct hard contact between the scraper and the filter barrel when scraping off the coal attached to the centrifugal filter barrel. The coal after centrifugation and dewatering is easily scraped into lumps due to the strong force of the scraper. These lumps of coal are very likely to block the discharge end of the centrifugal filter barrel, resulting in poor discharge. This not only frequently interrupts the production process and increases the cost of manual cleaning and maintenance, but also reduces the overall processing efficiency of the equipment. In view of this, this utility model is proposed. Utility Model Content

[0004] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is how to solve the problem of coal scraping easily forming lumps, causing blockage at the discharge end.

[0005] To address the aforementioned problems, this utility model provides a vertical scraper coal slime centrifuge, comprising a frame, a tank fixedly connected to the frame, a tank cover connected to the upper opening of the tank, and further comprising: a centrifugal filter barrel rotatably connected to the tank, with the discharge end of the centrifugal filter barrel extending downward through the tank and the frame; a drive mechanism for driving the centrifugal filter barrel to rotate, mounted on the frame; a hollow shaft motor fixedly mounted on the tank cover; a hollow shaft fixedly connected to the hollow shaft motor, with its lower end extending into the tank, and its upper end connected to an external material conveying pipe via a rotary joint; two rows of spray nozzles symmetrically opened on the hollow shaft; two sets of sleeves symmetrically fixedly connected to both sides of the hollow shaft; an iron block slidably connected inside the sleeves; a moving rod fixedly connected to the iron block; a scraper fixedly connected to one end of the two moving rods extending out of the sleeves on the same side; a tension spring sleeved on the outside of the moving rods, with both ends fixedly connected to the sleeves and the iron block respectively; and an electromagnet fixedly connected inside the sleeves, located on the side of the iron block away from the moving rods.

[0006] In the aforementioned vertical scraper coal slime centrifuge, by controlling the on / off state of the electromagnet and the rotational speed of the hollow shaft and centrifugal filter barrel, the scraper gradually approaches the barrel wall to scrape the material, so that the coal layer is scraped off little by little, reducing the formation of coal lumps, effectively avoiding blockage at the discharge end, and ensuring continuous and smooth discharge.

[0007] As a further improvement of this application, the drive mechanism includes a variable speed motor, a first sprocket and a second sprocket. The variable speed motor is fixedly connected to the frame, the first sprocket is fixedly connected to the output end of the variable speed motor, and the second sprocket is fixedly connected to the discharge end of the centrifugal filter barrel. A chain is wound between the first sprocket and the second sprocket.

[0008] As a further improvement of this application, the upper part of the tank is connected to multiple positioning wheels in a circular and equidistant manner via supports, and the positioning wheels roll against the centrifugal filter barrel.

[0009] As a further improvement of this application, two jet pipes are symmetrically fixedly connected inside the tank via support plates. Multiple nozzles are equidistantly arranged on the side of the jet pipes near the centrifugal filter barrel. A gas delivery assembly for delivering gas into the jet pipes is fixedly connected to the tank cover.

[0010] As a further improvement of this application, the gas transmission assembly includes an annular gas storage box and a gas transmission pipe. The annular gas storage box is fixedly connected to the tank cover, and the two ends of the gas transmission pipe are respectively connected to the gas outlet of the annular gas storage box and the gas inlet of the jet pipe. A solenoid valve is installed at the gas outlet of the gas transmission pipe.

[0011] As a further improvement of this application, two cylinders are symmetrically fixedly connected to the lower end of the can lid. A piston rod is slidably connected inside the cylinder. A T-shaped block is fixedly connected to one end of the piston rod extending out of the cylinder. An eccentric disk is fixedly connected to the hollow shaft between the two cylinders. A T-shaped groove is opened on the eccentric disk. The T-shaped block is slidably connected in the T-shaped groove. A one-way valve is installed in the air inlet and outlet of the cylinder. The air outlet of the cylinder is connected to the air inlet of the annular air storage box.

[0012] In summary, compared with existing technologies, this vertical scraper coal slime centrifuge controls the on / off state of the electromagnet and the rotation speed of the hollow shaft and centrifugal filter barrel, allowing the scraper to gradually approach the barrel wall to scrape the material, so that the coal layer is scraped off little by little, reducing the formation of coal lumps, effectively avoiding blockage at the discharge end, and ensuring continuous and smooth discharge.

[0013] During the centrifugal separation stage, the centrifugal filter barrel and the hollow shaft rotate rapidly in opposite directions, enhancing the centrifugal force field and enabling more efficient solid-liquid separation of coal-containing slurry, thus improving the slurry separation effect. During the scraping and discharge stage, reasonable speed adjustment and scraper action control allow the scraped coal to be discharged smoothly, reducing downtime for equipment cleaning due to blockage and improving overall production efficiency.

[0014] The design of using an electromagnet to attract iron blocks and limit the scraper's movement can prevent premature contact and friction between the scraper and the centrifugal filter barrel wall during the feeding and separation stage, reducing component wear, extending the service life of components such as the centrifugal filter barrel and scraper, and reducing equipment maintenance costs and frequency. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of an embodiment of this application;

[0016] Figure 2 This is a three-dimensional schematic diagram of a portion of the structure of an embodiment of this application;

[0017] Figure 3 This is an implementation method of the present application. Figure 1 A schematic diagram of the structure of part A;

[0018] Figure 4 This is an implementation method of the present application. Figure 1 A schematic diagram of the structure of part B.

[0019] Explanation of the labels in the diagram:

[0020] 1. Frame; 2. Tank body; 201. Tank lid; 202. Positioning wheel; 3. Centrifugal filter barrel; 4. Variable speed motor; 401. First sprocket; 402. Second sprocket; 5. Hollow shaft; 501. Hollow shaft motor; 502. Spray nozzle; 503. Sleeve; 504. Iron block; 505. Moving rod; 506. Tension spring; 507. Electromagnet; 508. Scraper; 509. Eccentric disc; 6. Cylinder; 601. Piston rod; 602. T-block; 603. Annular air storage box; 604. Air delivery pipe; 605. Jet nozzle. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] Implementation method:

[0023] Figures 1-4 The diagram shows a vertical scraper coal slime centrifuge, comprising a frame 1, a tank 2 fixedly connected to the frame 1, a tank cover 201 connected to the upper opening of the tank 2, and further comprising: a centrifugal filter 3 rotatably connected inside the tank 2, the discharge end of the centrifugal filter 3 extending downward through the tank 2 and the frame 1; a drive mechanism for driving the centrifugal filter 3 to rotate, mounted on the frame 1; a hollow shaft motor 501 fixedly mounted on the tank cover 201; and a hollow shaft 5 fixedly connected to the hollow shaft motor 501, with its lower end extending into the tank 2, the upper end of the hollow shaft 5 connected to an external conveying pipe via a rotary joint. Two rows of spray nozzles 502 are symmetrically opened on the hollow shaft 5; two sets of sleeves 503 are symmetrically fixedly connected to both sides of the hollow shaft 5; an iron block 504 is slidably connected inside the sleeve 503; a moving rod 505 is fixedly connected to the iron block 504; a scraper 508 is fixedly connected to one end of the two moving rods 505 on the same side that extends out of the sleeve 503; a tension spring 506 is sleeved on the outside of the moving rod 505, and its two ends are fixedly connected to the sleeve 503 and the iron block 504 respectively; an electromagnet 507 is fixedly connected inside the sleeve 503 and is located on the side of the iron block 504 away from the moving rod 505.

[0024] The drive mechanism includes a variable speed motor 4, a first sprocket 401 and a second sprocket 402. The variable speed motor 4 is fixedly connected to the frame 1. The first sprocket 401 is fixedly connected to the output end of the variable speed motor 4. The second sprocket 402 is fixedly connected to the discharge end of the centrifugal filter 3. A chain is wound between the first sprocket 401 and the second sprocket 402.

[0025] Before use, first check whether the connections of all components, such as frame 1, tank 2, centrifugal filter 3, drive mechanism (variable speed motor 4, first sprocket 401, second sprocket 402 and chain), hollow shaft motor 501, hollow shaft 5, sleeve 503, iron block 504, moving rod 505, scraper 508, tension spring 506, electromagnet 507, are secure and without looseness or deformation. Confirm that the rotary joint is properly connected to the external conveying pipe and that the power supply and control circuits of the electromagnet 507, motors, and other electrical components are correct.

[0026] After verification, the drive mechanism can be started. The variable-speed motor 4 rotates, driving the first sprocket 401 to rotate, which in turn drives the second sprocket 402 via chain transmission. This, in turn, controls the centrifugal filter 3 to rotate rapidly. Simultaneously, the hollow shaft motor 501 is started, controlling the hollow shaft 5 to rotate rapidly. The centrifugal filter 3 and the hollow shaft 5 are set to rotate in opposite directions, creating a reverse-rotation centrifugal environment. Then, the electromagnet 507 is energized, using electromagnetic attraction to act on the iron block 504, thus agitating the scraper 508. The limit is reached, at which point the scraper 508 will not move outward due to centrifugal force and will maintain a certain distance from the wall of the centrifugal filter barrel 3. Then, the coal-containing slurry can be introduced into the hollow shaft 5 through the external conveying pipe and rotary joint. Under the centrifugal force generated by the rapid rotation of the hollow shaft 5, the coal-containing slurry is thrown onto the wall of the centrifugal filter barrel 3 through the spray nozzle 502. Under the centrifugal action of the centrifugal filter barrel 3, the coal-containing slurry achieves solid-liquid separation. The slurry is separated out through the filter holes of the centrifugal filter barrel 3, while the coal adheres to the wall of the centrifugal filter barrel 3.

[0027] After a significant amount of coal adheres to the centrifugal filter barrel 3, the conveying of the coal-containing slurry is stopped. The rotation speed is adjusted by the variable speed motor 4, controlling the centrifugal filter barrel 3 to switch from rapid rotation to slow rotation. Then, the electromagnet 507 is de-energized, causing it to lose its attraction to the iron block 504. Next, the hollow shaft motor 501 is started, driving the hollow shaft 5 to rotate at an increasing speed. As the rotation speed of the hollow shaft 5 increases, the scraper 508, under the action of centrifugal force, overcomes the elasticity of the tension spring 506 and slowly approaches the barrel wall of the centrifugal filter barrel 3 through the linkage of the moving rod 505 and the iron block 504. During the continuous rotation of the hollow shaft 5, the scraper 508 gradually adheres to the barrel wall of the centrifugal filter barrel 3, scraping off the adhered coal layer bit by bit. The scraped coal is discharged through the discharge end under the slow rotation of the centrifugal filter barrel 3 and its own gravity.

[0028] When the scraper blade of a traditional centrifuge directly contacts the centrifugal filter barrel 3 to scrape coal, it easily scrapes the coal with water removed by centrifugation into lumps, clogging the discharge end. However, this equipment controls the on and off of the electromagnet 507 and changes the rotation speed of the hollow shaft 5 and the centrifugal filter barrel 3, so that the scraper 508 gradually approaches the barrel wall to scrape the material, so that the coal layer is scraped off little by little, reducing the formation of coal lumps, effectively avoiding the blockage at the discharge end, and ensuring continuous and smooth discharge.

[0029] During the centrifugal separation stage, the centrifugal filter barrel 3 and the hollow shaft 5 rotate rapidly in opposite directions, enhancing the centrifugal force field and enabling more efficient solid-liquid separation of coal-containing slurry, thus improving the slurry separation effect. During the scraping and discharge stage, reasonable speed adjustment and scraper 508 action control allow the scraped coal to be discharged smoothly, reducing equipment downtime for cleaning due to blockage and improving overall production efficiency.

[0030] The design of the electromagnet 507 adsorbing the iron block 504 and limiting the scraper 508 can prevent the scraper 508 from contacting and rubbing against the wall of the centrifugal filter barrel 3 too early during the feeding and separation stage, reduce component wear, extend the service life of components such as the centrifugal filter barrel 3 and the scraper 508, and reduce equipment maintenance costs and frequency.

[0031] Figures 1-4 As shown, the upper part of the tank 2 is connected to multiple positioning wheels 202 in a circular and equidistant manner via supports, and the positioning wheels 202 roll against the centrifugal filter 3.

[0032] Multiple positioning wheels 202 are circumferentially equidistantly connected to the upper end of the tank 2 via supports, and the positioning wheels 202 roll against the centrifugal filter barrel 3. The circumferentially equidistantly distributed positioning wheels 202 can limit the centrifugal filter barrel 3 from the top in all directions. When the centrifugal filter barrel 3 rotates at high speed to separate coal slime, it can effectively constrain the radial displacement of the filter barrel, ensure its rotational stability, avoid violent vibration and noise caused by rotational eccentricity, protect the equipment structure, and reduce frictional resistance through rolling contact, reduce the energy consumption of the filter barrel rotation and the wear of parts, extend the service life of the centrifugal filter barrel 3 and the positioning wheels 202, and improve the overall reliability and economy of the centrifuge operation.

[0033] Figures 1-4 As shown, two jet pipes 605 are symmetrically fixedly connected inside the tank 2 via support plates. Multiple nozzles are equidistantly provided on the side of the jet pipes 605 near the centrifugal filter barrel 3. A gas delivery assembly for delivering gas into the jet pipes 605 is fixedly connected to the tank cover 201.

[0034] The gas delivery assembly includes an annular gas storage tank 603 and a gas delivery pipe 604. The annular gas storage tank 603 is fixedly connected to the tank cover 201. The two ends of the gas delivery pipe 604 are connected to the gas outlet of the annular gas storage tank 603 and the gas inlet of the jet pipe 605, respectively. A solenoid valve is installed at the gas outlet of the gas delivery pipe 604.

[0035] Two cylinders 6 are symmetrically fixedly connected to the lower end of the can lid 201. A piston rod 601 is slidably connected inside the cylinder 6. A T-shaped block 602 is fixedly connected to one end of the piston rod 601 that extends out of the cylinder 6. An eccentric disk 509 is fixedly connected to the hollow shaft 5 between the two cylinders 6. A T-shaped groove is opened on the eccentric disk 509. The T-shaped block 602 is slidably connected in the T-shaped groove. One-way valves are installed in the inlet and outlet ports of the cylinders 6. The outlet port of the cylinder 6 is connected to the inlet port of the annular air storage box 603.

[0036] During the centrifugal separation stage, when the hollow shaft 5 rotates at high speed under the drive of the hollow shaft motor 501, the eccentric disk 509 fixed on the hollow shaft 5 rotates synchronously. Since the T-shaped block 602 is slidably connected in the T-groove of the eccentric disk 509, and the T-shaped block 602 is fixedly connected to the piston rod 601, which is slidably connected in the cylinder 6, the rotation of the eccentric disk 509 will drive the T-shaped block 602 to make circumferential motion along the T-groove, thereby causing the piston rod 601 to reciprocate and extend within the cylinder 6. At this time, the one-way valve in the inlet and outlet of the cylinder 6 plays a role. When the piston rod 601 extends outward, a negative pressure is formed inside the cylinder 6, and external gas is drawn into the cylinder 6 through the one-way valve at the inlet. When the piston rod 601 retracts inward, the gas in the cylinder 6 is compressed and is forced into the annular gas storage tank 603 through the one-way valve at the outlet, thus realizing the gas storage operation by means of the equipment's own power during the centrifugal separation process.

[0037] During the coal scraping stage, the hollow shaft 5 continues to rotate, and the eccentric disk 509 continues to drive the piston rod 601 to reciprocate within the cylinder 6. The annular gas storage box 603 continuously stores gas to reserve sufficient gas pressure for subsequent cleaning work.

[0038] When the coal scraping operation is completed and the filter holes of the centrifugal filter barrel 3 need to be cleaned, simply open the solenoid valve at the outlet of the gas supply pipe 604. The high-pressure gas stored in the annular gas storage box 603 will enter the jet pipe 605 through the gas supply pipe 604. Since multiple nozzles are equidistantly arranged on the side of the jet pipe 605 near the centrifugal filter barrel 3, the high-pressure gas is evenly sprayed onto the filter holes of the centrifugal filter barrel 3 through the nozzles, which can thoroughly blow away the fine coal slime particles remaining in the filter holes, effectively preventing the filter holes from being blocked and affecting the subsequent centrifugal separation effect.

[0039] The entire gas storage process does not require additional specialized gas filling equipment. Instead, it cleverly utilizes the rotation of the hollow shaft 5 as a power source, which greatly saves equipment costs and energy consumption, while simplifying the overall structure of the equipment. At the same time, it can promptly clean the filter holes of the centrifugal filter 3 after the coal scraping is completed, ensuring that the filter 3 always maintains good filtration performance, improving the working efficiency and stability of the centrifuge, reducing downtime for cleaning due to filter hole blockage, and lowering manual maintenance costs.

[0040] It should be noted that any content not described in detail in this specification is prior art known to those skilled in the art.

[0041] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A vertical scraper coal slime centrifuge, comprising a frame (1), wherein a tank (2) is fixedly connected to the frame (1), and a tank cover (201) is connected to the upper opening of the tank (2), characterized in that, Also includes: Centrifugal filter barrel (3) is rotatably connected inside the tank body (2), and the discharge end of the centrifugal filter barrel (3) passes downward through the tank body (2) and the frame (1); A drive mechanism for driving the centrifugal filter barrel (3) to rotate is mounted on the frame (1); A hollow shaft motor (501) is fixedly installed on the can cover (201); A hollow shaft (5) is fixedly connected in the hollow shaft motor (501), and its lower end extends into the tank body (2). The upper end of the hollow shaft (5) is connected to the external conveying pipe through a rotary joint. Two rows of nozzles (502) are symmetrically opened on the hollow shaft (5); Two sets of sleeves (503) are symmetrically fixedly connected to both sides of the hollow shaft (5); The iron block (504) is slidably connected inside the sleeve (503); The movable rod (505) is fixedly connected to the iron block (504); The scraper (508) is fixedly connected to one end of the sleeve (503) extending from the two moving rods (505) on the same side; The tension spring (506) is sleeved on the outside of the moving rod (505), and its two ends are fixedly connected to the sleeve (503) and the iron block (504) respectively. An electromagnet (507) is fixedly connected inside the sleeve (503) and located on the side of the iron block (504) away from the moving rod (505).

2. A vertical scraper coal slime centrifuge according to claim 1, characterized in that, The drive mechanism includes a variable speed motor (4), a first sprocket (401) and a second sprocket (402). The variable speed motor (4) is fixedly connected to the frame (1). The first sprocket (401) is fixedly connected to the output end of the variable speed motor (4). The second sprocket (402) is fixedly connected to the discharge end of the centrifugal filter (3). A chain is wound between the first sprocket (401) and the second sprocket (402).

3. A vertical scraper coal slime centrifuge according to claim 2, characterized in that, The upper part of the tank (2) is connected to multiple positioning wheels (202) by a support in a circular equidistant rotation. The positioning wheels (202) roll against the centrifugal filter barrel (3).

4. A vertical scraper coal slime centrifuge according to claim 1, characterized in that, The tank body (2) has two jet pipes (605) symmetrically fixedly connected inside by a support plate. Multiple nozzles are equidistantly provided on the side of the jet pipe (605) near the centrifugal filter barrel (3). A gas delivery assembly for delivering gas into the jet pipe (605) is fixedly connected to the tank cover (201).

5. A vertical scraper coal slime centrifuge according to claim 4, characterized in that, The gas delivery assembly includes an annular gas storage tank (603) and a gas delivery pipe (604). The annular gas storage tank (603) is fixedly connected to the tank cover (201). The two ends of the gas delivery pipe (604) are respectively connected to the gas outlet of the annular gas storage tank (603) and the gas inlet of the jet pipe (605). An electromagnetic valve is installed at the gas outlet of the gas delivery pipe (604).

6. A vertical scraper coal slime centrifuge according to claim 5, characterized in that, Two cylinders (6) are symmetrically fixedly connected to the lower end of the can lid (201). A piston rod (601) is slidably connected inside the cylinder (6). A T-shaped block (602) is fixedly connected to one end of the piston rod (6) extending out of the cylinder (6). An eccentric disk (509) is fixedly connected to the hollow shaft (5) between the two cylinders (6). A T-shaped groove is formed on the eccentric disk (509). The T-shaped block (602) is slidably connected in the T-shaped groove. A one-way valve is installed in the air inlet and outlet of the cylinder (6). The air outlet of the cylinder (6) is connected to the air inlet of the annular air storage box (603).

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