Electric lifting type circulating water filtering device for coal dressing

Abstract

The utility model discloses an electric lifting type circulating water filtering device for coal dressing, which comprises a lifting mechanism, a controller, an alarm, a filter screen, a liquid level meter and a limiting slideway, the lifting mechanism is fixedly connected with the top of the filter screen so as to conveniently drive the filter screen to move up and down, and the controller is respectively and electrically connected with the lifting mechanism, the alarm and the liquid level meter. The two ends, in the length direction, of the filter screen are embedded into the limiting sliding ways correspondingly, and the liquid level meter is installed at the position close to the filter screen in the vertical direction so that the water level height of the filter screen can be conveniently detected. According to the utility model, the liquid level meter is arranged at the filter screen, the liquid level meter is electrically connected with the controller and transmits liquid level data to the controller, and the controller judges whether to start the lifting mechanism to treat impurities according to the liquid level data, so that the automation level of the filter device is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, and in particular to an electric lifting circulating water filtration device for coal preparation. Background Technology

[0002] Currently, most coal preparation plants use heavy medium shallow trough separation for lump coal and heavy medium hydrocyclone separation for fine coal. Both lump and fine coal are separated using heavy medium separation technology. After separation, the product is discharged along with a large amount of suspension, so it is necessary to remove the suspension and wash away suspended particles adhering to the product. This is the suspension recovery operation. This operation not only ensures product quality but also allows the suspension to be recycled, reducing losses during production. Magnetite loss is a key technical and economic indicator for heavy medium coal preparation plants. It not only relates to the amount of raw material consumption, but also affects whether the heavy media system can maintain normal and stable production. Circulating water serves as the water source for the screening machines and magnetic separators in the coal preparation plant. The quality of the spray water directly affects the heavy media recovery effect. Because raw coal is mixed with some engineering waste during mining and transportation, such as iron wire, wood, and woven materials, some of these soft impurities will enter the thickening tank with the coal preparation plant's water system and eventually enter the circulating water of the coal preparation plant, causing blockage of the spray nozzles of the screening machines and magnetic separators, thus affecting the recovery effect of heavy media and suspensions. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an electric lifting circulating water filtration device for coal preparation. A level gauge is installed at the filter screen, and the level gauge is electrically connected to the controller and transmits the level data to the controller. The controller determines whether to start the lifting mechanism to handle debris based on the level data, which improves the automation level of the filtration device and reduces the labor intensity of the workers.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an electric lifting circulating water filtration device for coal preparation, comprising a lifting mechanism, a controller, an alarm, a filter screen, a level gauge, and a limiting slide. The lifting mechanism is fastened to the top of the filter screen to facilitate the up-and-down movement of the filter screen. The controller is electrically connected to the lifting mechanism, the alarm, and the level gauge respectively. The two ends of the filter screen along its length are respectively embedded in the limiting slide. The level gauge is installed vertically near the filter screen to facilitate the detection of the water level at the filter screen.

[0005] Preferably, the limiting slide includes a first slide and a second slide, both of which are U-shaped structures. The first slide and the second slide are spaced apart and arranged facing each other to facilitate limiting the movement direction of the filter screen.

[0006] Preferably, the filter screen includes a vertical screen, side screens, and a bottom screen. The two ends of the vertical screen along its length are respectively embedded in the first slide rail and the second slide rail to restrict the movement direction of the vertical screen. There are two side screens. The length of the bottom screen is consistent with the spacing between the opposing side screens. The two side screens and the bottom screen are connected to form a U-shaped structure. The sidewalls of the U-shaped structure are tightly connected to the sidewalls of the vertical screen.

[0007] Preferably, the top center of the filter screen is provided with a fixing connector, which is connected to the filter screen by bolts and threads. The top of the fixing connector is located on the upper side of the filter screen and is fastened to the bottom of the lifting mechanism.

[0008] Preferably, the lifting mechanism includes a motor and a lifting part, and the output shaft of the motor is fastened to the top of the lifting part to facilitate the up and down movement of the lifting part.

[0009] Preferably, the alarm is an audible and visual alarm.

[0010] This utility model has the following advantages compared with the prior art:

[0011] 1. This utility model sets a level gauge at the filter screen, which is electrically connected to the controller and transmits the level data to the controller. The controller determines whether to start the lifting mechanism to handle debris based on the level data, which improves the automation level of the filtration device and reduces the labor intensity of the staff.

[0012] 2. This utility model filters the water used in coal preparation plants, preventing clogging of the spray nozzles of screening machines and magnetic separators during production, which would affect normal washing and selection. It also prevents debris from clogging the nozzles and reduces the workload of on-site personnel.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1—Lifting mechanism; 2—Controller; 3—Alarm;

[0017] 4—Filter screen; 5—Level gauge; 6—Limit slide;

[0018] 7—First slide; 8—Second slide; 9—Motor;

[0019] 10—Lifting unit; 11—Vertical net; 12—Side net;

[0020] 13—Bottom mesh; 14—Fixed connector. Detailed Implementation

[0021] like Figure 1 As shown, this utility model discloses an electric lifting circulating water filtration device for coal preparation, including a lifting mechanism 1, a controller 2, an alarm 3, a filter screen 4, a level gauge 5, and a limiting slide 6. The lifting mechanism 1 is fastened to the top of the filter screen 4 to facilitate the up and down movement of the filter screen 4. The controller 2 is electrically connected to the lifting mechanism 1, the alarm 3, and the level gauge 5 respectively. The two ends of the filter screen 4 along its length are respectively embedded in the limiting slide 6. The level gauge 5 is installed vertically near the filter screen 4 to facilitate the detection of the water level height at the filter screen 4.

[0022] The circulating water from the thickener in the coal preparation plant flows by gravity through the overflow weir to the circulating water pool. A circulating water filtration device is installed between the thickener and the circulating water pool to filter impurities in the circulating water. Impurities accumulate at filter screen 4, causing the liquid level at filter screen 4 to rise. When the liquid level at filter screen 4 rises to the preset height of the level gauge 5, the controller 2 sends an alarm message to the central control room, so that the central control room can arrange for personnel to arrive at the site. At the same time, the controller 2 controls the alarm 3 to sound and controls the lifting mechanism 1 to start working. After the personnel arrive at the site, the alarm is turned off, and the lifting mechanism 1 drives the filter screen 4 to slide upward. After the bottom of the filter screen 4 is removed from the circulating water, the lifting mechanism 1 stops working. After the impurities on the filter screen 4 are cleaned, the controller 2 controls the filter screen 4 to fall back to the initial position to continue filtering the circulating water.

[0023] The controller 2 is installed on the cement support of the passageway from the thickener to the circulating water tank. The controller 2 is an AB (Allen-Bradley) controller from Rockwell Automation. The alarm 3 is used for alarm. The level gauge 5 is set vertically to facilitate the detection of the liquid level in the filter screen 4, so as to avoid the liquid level in the filter screen 4 being too high and causing the debris to overflow. The level gauge 5 is a float level gauge.

[0024] The limiting slide 6 includes a first slide 7 and a second slide 8. Both the first slide 7 and the second slide 8 are U-shaped structures. The first slide 7 and the second slide 8 are spaced apart and arranged facing each other to facilitate limiting the movement direction of the filter screen 4.

[0025] The first slide 7 and the second slide 8 are respectively embedded in the grooves on both sides of the passage from the overflow weir of the thickening tank to the circulating water tank, so that the positions of the first slide 7 and the second slide 8 are fixed. The length of the horizontal end of the first slide 7 and the horizontal end of the second slide 8 are consistent with the height of the filter screen 4. The height of the vertical end of the first slide 7 and the vertical end of the second slide 8 are both 50mm. That is, the left and right ends of the filter screen 4 along the length direction are respectively 50mm embedded in the first slide 7 and the second slide 8, which prevents the filter screen 4 from moving. The first slide 7 and the second slide 8 restrict the filter screen 4 from moving up and down in the vertical direction.

[0026] Furthermore, the top of both the first slide 7 and the second slide 8 along their length is provided with limiting members to prevent the filter screen 4 from moving upward under the impact of circulating water, thus affecting the filtration effect. After both ends of the filter screen 4 along its length slide into the first slide 7 and the second slide 8, the limiting members at the top of the first slide 7 and the second slide 8 are locked. If it is necessary to clean the debris inside the filter screen 4, the limiting members are released, and the lifting mechanism 1 drives the filter screen 4 to move upward in the vertical direction. After the debris on the filter screen 4 is cleaned, the lifting mechanism 1 pushes the filter screen 4 downward along the first slide 7 and the second slide 8. When the top of the filter screen 4 is on the same horizontal plane as the top of the first slide 7 and the second slide 8, the limiting members at the top of the first slide 7 and the second slide 8 are locked.

[0027] The filter screen 4 includes a vertical screen 11, side screens 12, and a bottom screen 13. The two ends of the vertical screen 11 along its length are respectively embedded in the first slide rail 7 and the second slide rail 8 to restrict the movement direction of the vertical screen 11. There are two side screens 12. The length of the bottom screen 13 is consistent with the spacing between the opposing side screens 12. The two side screens 12 and the bottom screen 13 are connected to form a U-shaped structure. The sidewalls of the U-shaped structure are tightly connected to the sidewalls of the vertical screen 11.

[0028] In this embodiment, the vertical mesh 11 has a height of 1000mm, a width of 1400mm, and a thickness of 2mm. The side mesh 12 and the bottom mesh 13 have the same thickness as the vertical mesh 11, which is 2mm. The aperture of each mesh hole on the vertical mesh 11, the side mesh 12, and the bottom mesh 13 is 6mm. The two ends of the vertical mesh 11 are respectively embedded in the first slide rail 7 and the second slide rail 8 with a 50mm diameter. After the U-shaped structure formed by the side mesh 12 and the bottom mesh 13 is connected to the vertical mesh 11, it can move up or down synchronously with the vertical mesh 11. The side mesh 12 and the bottom mesh 13 can also prevent the impurities filtered by the vertical mesh 11 from being washed away by the circulating water, so that the impurities are retained on the filter screen 4.

[0029] Furthermore, in order to improve the stability of the connection between the side net 12 and the vertical net 11, a reinforcing member is added at the connection between the side net 12 and the vertical net 11. The reinforcing member is a right-angled triangle structure, and the two right-angled sides of the reinforcing member are connected to the side net 12 and the vertical net 11 respectively.

[0030] The filter screen 4 has a fixed connector 14 at the top center. The fixed connector 14 is connected to the filter screen 4 by bolt thread. The top of the fixed connector 14 is located on the upper side of the filter screen 4 and is tightly connected to the bottom of the lifting mechanism 1.

[0031] In this embodiment, the fixing connector 14 has an inverted U-shaped structure. The two vertical ends of the fixing connector 14 are located on both sides of the vertical mesh 11, and the horizontal end of the fixing connector 14 is located at the top of the vertical mesh 11. The vertical mesh 11 is provided with two first threaded holes at intervals near the top, and the two first threaded holes are located on both sides of the central axis of the vertical mesh 11. The two vertical ends of the fixing connector 14 are provided with second threaded holes facing each other. The number of second threaded holes at each vertical end of the fixing connector 14 is two. The interval between the two second threaded holes is consistent with the interval between the two first threaded holes, so that the fixing connector 14 and the vertical mesh 11 can be connected by bolt threads. The middle part of the outer side of the horizontal end of the fixing connector 14 is fastened to the bottom of the lifting mechanism 1, so that the lifting mechanism 1 can drive the fixing connector 14 to move up and down, and the vertical mesh 11 moves up and down synchronously.

[0032] In another possible embodiment, unlike the above embodiment, the vertical mesh 11 has a first threaded hole on the central axis near the top, and the fixing connector 14 has a second threaded hole in the middle. After the bolt passes through the first threaded hole and the second threaded hole, the vertical mesh 11 is fastened to the fixing connector 14.

[0033] The vertical mesh 11 is connected to the fixed connector 14 by bolt threads, which facilitates replacement after the vertical mesh 11 wears out.

[0034] The lifting mechanism 1 includes a motor 9 and a lifting part 10. The output shaft of the motor 9 is fastened to the top of the lifting part 10 to facilitate the up and down movement of the lifting part 10.

[0035] In this embodiment, the output shaft of the motor 9 is mounted downwards on a steel frame structure, which is welded to a concrete support. The lifting part 10 is a telescopic structure. The rotation of the motor 9 can cause the lifting part 10 to extend or shorten. When the motor 9 rotates forward, the lifting part 10 extends and pushes the fixed connector 14 and the vertical net 11 to move downwards in the vertical direction. When the motor 9 rotates in reverse, the lifting part 10 shortens and drives the fixed connector 14 and the vertical net 11 to move upwards in the vertical direction.

[0036] The alarm device 3 is an audible and visual alarm device.

[0037] In operation, circulating water carries debris towards the vertical mesh 11, which intercepts the debris. The debris in the circulating water is blocked at the vertical mesh 11. The level gauge 5 continuously monitors the water level at the vertical mesh 11 and transmits the data to the controller 2. When the water level at the vertical mesh 11 reaches the preset height of the level gauge 5, the controller 2 activates the alarm 3 and motor 9. Simultaneously, the controller 2 sends an alarm message to the central control room. The alarm 3 sounds an alarm, and the motor 9 drives the lifting unit 10, the fixed connector 14, and the vertical mesh 11 to move upwards synchronously. The vertical mesh 11 moves along... The first slide 7 and the second slide 8 move vertically upwards until the bottom of the vertical net 11 slides out of the circulating water surface. The motor 9 stops working and cleans the debris on the vertical net 11, the side net 12 and the bottom net 13. Then, the motor 9 is restarted by the controller 2. The motor 9 pushes the lifting part 10, the fixed connecting part 14 and the vertical net 11 to move downwards synchronously. The vertical net 11 slides down along the first slide 7 and the second slide 8 until the top of the vertical net 11 is at the same height as the first slide 7 and the second slide 8. The motor 9 stops working and the filter screen 4 continues to filter the debris in the circulating water.

[0038] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An electrically operated, lifting-type circulating water filtration device for coal preparation, characterized in that: The device includes a lifting mechanism (1), a controller (2), an alarm (3), a filter screen (4), a level gauge (5), and a limiting slide (6). The lifting mechanism (1) is fastened to the top of the filter screen (4) to facilitate the up and down movement of the filter screen (4). The controller (2) is electrically connected to the lifting mechanism (1), the alarm (3), and the level gauge (5) respectively. The two ends of the filter screen (4) along the length direction are respectively embedded in the limiting slide (6). The level gauge (5) is installed vertically near the filter screen (4) to facilitate the detection of the water level height at the filter screen (4).

2. The electrically operated lifting circulating water filtration device for coal preparation according to claim 1, characterized in that: The limiting slide (6) includes a first slide (7) and a second slide (8). Both the first slide (7) and the second slide (8) are U-shaped structures. The first slide (7) and the second slide (8) are spaced apart and arranged facing each other to facilitate limiting the movement direction of the filter screen (4).

3. The electrically operated lifting circulating water filtration device for coal preparation according to claim 2, characterized in that: The filter screen (4) includes a vertical screen (11), side screens (12) and a bottom screen (13). The two ends of the vertical screen (11) along the length direction are respectively embedded in the first slide rail (7) and the second slide rail (8) to restrict the movement direction of the vertical screen (11). There are two side screens (12). The length of the bottom screen (13) is consistent with the spacing between the opposing side screens (12). The two side screens (12) and the bottom screen (13) are connected to form a U-shaped structure. The side wall of the U-shaped structure is tightly connected to the side wall of the vertical screen (11).

4. The electrically operated lifting circulating water filtration device for coal preparation according to claim 1, characterized in that: The filter screen (4) has a fixed connector (14) at the top center. The fixed connector (14) is connected to the filter screen (4) by bolt thread. The top of the fixed connector (14) is located on the upper side of the filter screen (4) and is fastened to the bottom of the lifting mechanism (1).

5. The electrically operated lifting circulating water filtration device for coal preparation according to claim 1, characterized in that: The lifting mechanism (1) includes a motor (9) and a lifting part (10). The output shaft of the motor (9) is fastened to the top of the lifting part (10) to facilitate the up and down movement of the lifting part (10).

6. The electrically operated lifting circulating water filtration device for coal preparation according to claim 1, characterized in that: The alarm (3) is an audible and visual alarm.

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