Sand returning device of thickener

Abstract

The utility model relates to the technical field of thickeners, in particular to a sand returning device of a thickener. Comprising an outer cylinder, a circular cover, a conveying mechanism, a discharging groove and a cleaning mechanism. A mounting frame is arranged at the upper end of the outer cylinder; the circular cover is positioned on the inner side of the outer cylinder; an ore inlet pipe communicated with an inner cavity of the circular cover is arranged at the upper end of the circular cover; the input end of the conveying mechanism is arranged on the lower side in the outer cylinder; the discharging groove is formed in the upper end of the outer cylinder, the output end of the conveying mechanism is located over the discharging groove, the discharging groove communicates with the inner side of the circular cover, and a filter screen is arranged on the inner side of the discharging groove; the cleaning mechanism is installed on the discharging groove and used for cleaning the upper surface of the filter screen. According to the utility model, a water body containing fine sand can be conveyed to the upper part of the outer cylinder through the conveying mechanism, and the quality of underflow can be optimized by collecting the fine sand.

Description

TECHNICAL FIELD

[0001] The utility model relates to thickener technical field, in particular to a thickener sand return device. BACKGROUND

[0002] Thickener (thickening machine) is a kind of equipment for thickening slurry or sludge, its main function is to separate solid particles from liquid by gravity settling, thereby improving the concentration of solids.Thickeners are widely used in mining, metallurgy, environmental protection and other fields.

[0003] Solid particles gradually sink in the clarification zone of thickener, and relatively coarse particles are first settled to the bottom to form underflow.In the operation process of thickener, the settling velocity of relatively fine particles is slow, and if the underflow contains too many fine particles, it may affect the subsequent processing or utilization, so the fine sand needs to be treated, and when the slurry is poured into the inside of the outer cylinder, the slurry will spread around due to its turbidity, which is easy to pollute the water body in the overflow area. SUMMARY

[0004] The utility model aims at the problems in the background art, and provides a thickener sand return device.

[0005] The technical scheme of the utility model, a thickener sand return device, comprises:

[0006] The outer cylinder is provided with a mounting frame at the upper end thereof, and an overflow groove is arranged on the outer periphery of the outer cylinder, and a drain pipe is communicated with the overflow groove;

[0007] The circular cover is located on the inner side of the outer cylinder and is connected with the inner wall of the outer cylinder, and the upper end of the circular cover is provided with a mine inlet pipe communicated with the inner cavity thereof;

[0008] The conveying mechanism is arranged on the inner lower side of the outer cylinder;

[0009] The discharge chute is arranged on the upper end of the outer cylinder, and the output end of the conveying mechanism is located at the position directly above the discharge chute, the discharge chute is communicated with the inner side of the circular cover, the inner side of the discharge chute is provided with a filter screen, one end of the discharge chute close to the outer side of the outer cylinder is provided with a notch, and the filter screen is flush with the lower end of the notch;

[0010] The cleaning mechanism is arranged on the discharge chute and used for cleaning the upper surface of the filter screen.

[0011] Preferably, the thickener sand return device further comprises a scraping mechanism, the scraping mechanism comprises a rake frame, a connecting frame and a first power assembly used for driving the rotary cylinder to rotate, the rake frame is arranged on the inner bottom of the outer cylinder, the rake frame is connected with the rotary cylinder through the connecting frame, and the rotary cylinder penetrates through the mine inlet pipe and is rotatably arranged on the mounting frame.

[0012] Preferably, the first power assembly comprises a reduction motor, a gear and a gear ring, wherein the reduction motor is arranged on the mounting frame, the gear is arranged on the output shaft of the reduction motor, and the gear ring is arranged on the outer periphery of the rotating cylinder body and is in meshing connection with the gear.

[0013] Preferably, the bottom end of the outer cylinder is in communication with a discharging pipe, the bottom end of the discharging pipe is rotatably provided with a sealing plate, and the discharging pipe is provided with a first linear driving mechanism for driving the sealing plate to rotate; the inner side of the outer cylinder is provided with a sealing plug, the sealing plug is connected with a movable rod, the movable rod movably penetrates the rotating cylinder body, and the mounting frame is provided with a second linear driving mechanism for driving the movable rod to move.

[0014] Preferably, the conveying mechanism comprises a conveying cylinder body, a motor, an inclined pipe and an auger, the conveying cylinder body is arranged on the mounting frame, the bottom end of the conveying cylinder body is arranged at the inner bottom of the outer cylinder, the auger is rotatably arranged on the inner side of the conveying cylinder body, the motor is arranged on the upper end of the conveying cylinder body and the output shaft of the motor is connected with the rotating shaft of the auger, the inclined pipe is in communication with the upper end of the conveying cylinder body, and the other end of the inclined pipe is arranged directly above the discharging groove.

[0015] Preferably, the cleaning structure comprises a scraper slidably arranged on the discharging groove, a brush arranged on the scraper and in contact with the filter screen, and a second power assembly for driving the scraper to move.

[0016] Preferably, the second power assembly comprises a servo motor and a threaded rod, the servo motor is arranged on the side of the discharging groove, the threaded rod is connected with the output shaft of the servo motor, and the scraper is in threaded connection with the threaded rod.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] 1. The circular cover arranged in the technical scheme can separate the entering ore pulp from the water body in the overflow area, avoids the ore pulp from spreading to the overflow area, and thus prevents the overflow water body from being stirred.

[0019] 2. The conveying mechanism arranged can convey the water body containing fine sand to the upper side of the outer cylinder, and the fine sand can be collected, so that the underflow quality is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 and Fig. 2 are structural schematic diagrams of the utility model.

[0021] Fig. 3 is a sectional view of the utility model.

[0022] : 1, outer cylinder; 2, circular cover; 3, funnel; 4, overflow groove; 5, mounting frame; 6, sealing plug; 7, discharging pipe; 8, first linear driving mechanism; 9, sealing plate; 10, rake frame; 11, connecting frame; 12, conveying cylinder body; 13, motor; 14, inclined pipe; 15, discharging groove; 16, filter screen; 17, servo motor; 18, threaded rod; 19, scraper; 20, movable rod; 21, rotating cylinder body; 22, speed reducer; 23, gear; 24, gear ring; 25, fixed block; 26, support; 27, ore feeding pipe; 28, second linear driving mechanism. DETAILED DESCRIPTION

[0023] Example One

[0024] As shown in the drawings, the thickener sand return device provided by the embodiment comprises an outer cylinder 1, a circular cover 2, a conveying mechanism, a discharging groove 15 and a cleaning mechanism. Figs. 1-3 The bottom end of the outer cylinder 1 is provided with a support, and the upper end of the outer cylinder 1 is provided with a mounting frame 5; the outer periphery of the outer cylinder 1 is provided with an overflow groove 4, and a drain pipe is communicatively arranged on the overflow groove 4; the circular cover 2 is located on the inner side of the outer cylinder 1, a plurality of fixed blocks 25 are connected between the circular cover 2 and the outer cylinder 1, and the circular cover 2 is connected with the inner wall of the outer cylinder 1; the upper end of the circular cover 2 is provided with an ore feeding pipe 27 which is in communication with the inner cavity of the circular cover 2, and the upper end of the ore feeding pipe 27 is provided with a funnel 3.

[0025] The input end of the conveying mechanism is arranged on the inner lower side of the outer cylinder 1, and the conveying mechanism comprises a conveying cylinder body 12, a motor 13, an inclined pipe 14 and an auger; the conveying cylinder body 12 is arranged on the mounting frame 5, the bottom end of the conveying cylinder body 12 is arranged on the inner bottom of the outer cylinder 1, the auger is rotatably arranged on the inner side of the conveying cylinder body 12, the motor 13 is arranged on the upper end of the conveying cylinder body 12 and the output shaft of the motor 13 is connected with the rotating shaft of the auger, the inclined pipe 14 is in communication with the upper end of the conveying cylinder body 12, and the other end of the inclined pipe 14 is arranged above the discharging groove 15.

[0026] The discharging groove 15 is arranged on the upper end of the outer cylinder 1, the output end of the conveying mechanism is located at a position above the discharging groove 15, the discharging groove 15 is in communication with the inner side of the circular cover 2, the inner side of the discharging groove 15 is provided with a filter screen 16, one end of the discharging groove 15 close to the outer side of the outer cylinder 1 is provided with a notch, and the filter screen 16 is flush with the lower end of the notch.

[0027]

[0028] ​The cleaning mechanism is installed on the discharging chute 15 for cleaning the upper surface of the filter screen 16, and the cleaning mechanism comprises a scraper 19 slidably installed on the discharging chute 15, brush hairs installed on the scraper 19 and in contact with the filter screen 16, and a second power assembly for driving the scraper 19 to move, wherein the second power assembly comprises a servo motor 17 installed on the side of the discharging chute 15 and a threaded rod 18 connected with the output shaft of the servo motor 17, and the scraper 19 is threadedly connected with the threaded rod 18.

[0029] The scraping mechanism further comprises a rake frame 10, a connecting frame 11 and a first power assembly for driving the rotating cylinder 21 to rotate, wherein the first power assembly comprises a speed reducer 22, a gear 23 and a gear ring 24, the speed reducer 22 is arranged on the mounting frame 5, the gear 23 is installed on the output shaft of the speed reducer 22, the gear ring 24 is installed on the outer periphery of the rotating cylinder 21, and the gear ring 24 is in meshing connection with the gear 23, the rake frame 10 is arranged on the inner bottom of the outer cylinder 1, the rake frame 10 is connected with the rotating cylinder 21 through the connecting frame 11, the rotating cylinder 21 penetrates through the ore inlet pipe 27 and is rotatably installed on the mounting frame 5, and the scraping mechanism is arranged to scrape the bottom slurry deposited in the inner portion of the outer cylinder 1, so that the bottom slurry is concentrated to flow to the discharging pipe 7.

[0030] Specifically, the ore slurry enters the inner portion of the outer cylinder 1 through the ore inlet pipe 27, the circular cover 2 is arranged with an opening downward, the flowing ore slurry enters the inner portion of the circular cover 2, the area between the circular cover 2 and the outer cylinder 1 is used for water overflow, and the circular cover 2 separates the entering ore slurry from the water in the overflow area, so that the ore slurry is prevented from diffusing to the overflow area, thereby preventing the overflow water from being stirred up; since the ore slurry contains fine sand, the settling speed of the fine sand is slow, when most of the ore slurry is deposited to the inner bottom of the outer cylinder 1, the fine sand is still continuing to settle, the motor 13 is started to drive the auger to rotate, so that the water containing the fine sand is transported to the upper portion of the outer cylinder 1, and then flows to the filter screen 16 through the inclined pipe 14, the fine sand in the water is intercepted by the filter screen 16, and the filtered water flows back to the inner portion of the outer cylinder 1, through the collection of the fine sand, the quality of the underflow (the underflow is the high-concentration solid output after the treatment of the thickener, and if the underflow contains too many fine particles, the subsequent treatment or utilization may be affected) can be optimized.

[0031] Embodiment two

[0032] As Fig. 3Compared with the first embodiment, the bottom end of the outer cylinder 1 is communicated with a discharging pipe 7, the bottom end of the discharging pipe 7 is rotatably provided with a sealing plate 9, and the discharging pipe 7 is provided with a first linear driving mechanism 8 for driving the sealing plate 9 to rotate; the inner side of the outer cylinder 1 is provided with a sealing plug 6, the sealing plug 6 is connected with a movable rod 20, the movable rod 20 movably penetrates a rotating cylinder body 21, and the mounting frame 5 is provided with a second linear driving mechanism 28 for driving the movable rod 20 to move; when the precipitated bottom slurry is discharged, the second linear driving mechanism 28 is arranged to drive the sealing plug 6 to move downward to a limited position, and then the first linear driving mechanism 8 is started to work to drive the sealing plate 9 to overturn, at this time, the bottom slurry flows out, and the sealing plug 6 can be arranged to block the inner side of the discharging pipe 7, so that the overflow of water is reduced.

[0033] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to this, and various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model.

Claims

1. A thickener sand return device, characterized in that, include: The outer cylinder (1) is provided with a mounting bracket (5) at its upper end; an overflow groove (4) is provided on the outer periphery of the outer cylinder (1), and a drain pipe is connected to the overflow groove (4); A circular cover (2) is located inside the outer cylinder (1) and is connected to the inner wall of the outer cylinder (1); the upper end of the circular cover (2) is provided with a ore inlet pipe (27) that communicates with its inner cavity; The input end of the conveying mechanism is located inside the lower side of the outer cylinder (1); The material feeding trough (15) is located at the upper end of the outer cylinder (1). The output end of the conveying mechanism is located directly above the material feeding trough (15). The material feeding trough (15) is connected to the inner side of the circular cover (2). A filter screen (16) is provided on the inner side of the material feeding trough (15). A notch is provided at one end of the material feeding trough (15) near the outer side of the outer cylinder (1). The filter screen (16) is flush with the lower end of the notch. A cleaning mechanism installed on the feed trough (15) for cleaning the upper surface of the filter screen (16).

2. The thickener sand return device according to claim 1, characterized in that, It also includes a scraping mechanism, which includes a rake frame (10), a connecting frame (11), and a first power component for driving the rotating cylinder (21) to rotate. The rake frame (10) is located at the bottom of the inner side of the outer cylinder (1). The rake frame (10) is connected to the rotating cylinder (21) through the connecting frame (11). The rotating cylinder (21) passes through the ore inlet pipe (27) and is rotatably mounted on the mounting frame (5).

3. The thickener sand return device according to claim 2, characterized in that, The first power assembly includes a geared motor (22), a gear (23), and a gear ring (24). The geared motor (22) is mounted on the mounting bracket (5), the gear (23) is mounted on the output shaft of the geared motor (22), and the gear ring (24) is mounted on the outer periphery of the rotating cylinder (21), and the gear ring (24) meshes with the gear (23).

4. A thickener sand return device according to claim 2, characterized in that, The bottom end of the outer cylinder (1) is connected to a feed pipe (7), and a sealing plate (9) is rotatably installed at the bottom end of the feed pipe (7). A first linear drive mechanism (8) for driving the sealing plate (9) to rotate is installed on the feed pipe (7). A sealing plug (6) is provided on the inner side of the outer cylinder (1), and a movable rod (20) is connected to the sealing plug (6). The movable rod (20) movably passes through the rotating cylinder (21). A second linear drive mechanism (28) for driving the movable rod (20) to move is installed on the mounting frame (5).

5. A thickener sand return device according to claim 1, characterized in that, The conveying mechanism includes a conveying cylinder (12), a motor (13), an inclined tube (14), and an auger. The conveying cylinder (12) is mounted on the mounting frame (5). The bottom end of the conveying cylinder (12) is located at the bottom of the inner side of the outer cylinder (1). The auger is rotatably mounted inside the conveying cylinder (12). The motor (13) is mounted at the upper end of the conveying cylinder (12), and its output shaft is connected to the rotating shaft of the auger. The inclined tube (14) is connected to the upper end of the conveying cylinder (12), and the other end of the inclined tube (14) is located directly above the discharge trough (15).

6. A thickener sand return device according to claim 1, characterized in that, The cleaning structure includes a scraper (19) slidably mounted on the feed trough (15), bristles mounted on the scraper (19) and in contact with the filter screen (16), and a second power assembly for driving the scraper (19) to move.

7. A thickener sand return device according to claim 6, characterized in that, The second power assembly includes a servo motor (17) and a threaded rod (18). The servo motor (17) is installed on the side of the feed chute (15). The threaded rod (18) is connected to the output shaft of the servo motor (17). The scraper (19) is threadedly connected to the threaded rod (18).

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