A graphite black powder microbubble flotation device

Abstract

The present invention relates to the technical field of flotation devices, and specifically to a graphite black powder microbubble flotation device, comprising a flotation column, a collecting cover is installed on the top of the flotation column, and the bottom of the collecting cover is located below the top opening of the flotation column and is a flat-bottomed structure, a discharge trough is formed between the inner wall of the collecting cover and the outer wall of the flotation column, a discharge pipe is connected to one side of the bottom of the discharge trough, and a scraper mechanism is installed on the top of the collecting cover. The present invention can drive a first rotating shaft to rotate through a driving component to rotate two first scrapers in opposite directions, so that the foam collected in the discharge trough is pushed toward the discharge pipe, so that the foam can quickly flow to the discharge pipe and be discharged for collection, and then the first scraper is raised and then rotated to perform the next scraping operation. The entire scraping process can not only reciprocate and continuously scrape the foam toward the discharge pipe to increase the discharge speed of the foam and avoid foam accumulation, but also will not cause the foam to flow to a position far away from the discharge pipe during the rotation process.

Description

Technical Field

[0001] The invention relates to the technical field of flotation devices, in particular to a graphite black powder microbubble flotation device. Background Art

[0002] When recycling the black powder in lithium-ion batteries, it is generally necessary to select it by flotation column flotation. The existing flotation column generally sets a downwardly inclined discharge trough at the upper discharge port, so that the mineralized foam layer formed above the flotation column is quickly scraped into the discharge trough by scraping, and then flows to the discharge pipe position and discharged through the angle of the discharge trough. However, due to the poor fluidity of the foam, the foam cannot flow out in time after flowing into the discharge trough, causing the foam to accumulate in the discharge trough, and in severe cases, it will flow back into the flotation column. To this end, the present invention has developed a graphite black powder microbubble flotation device to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a graphite black powder micro-bubble flotation device, which can discharge the foam in a discharge trough in time and avoid the foam from accumulating in the discharge trough.

[0004] To achieve the above purpose, the technical solution provided by the present invention is:

[0005] A graphite black powder micro-bubble flotation device comprises a flotation column, a material collecting cover is installed on the top of the flotation column, and the bottom of the material collecting cover is located below the top opening of the flotation column and has a flat bottom structure, a discharge trough is formed between the inner wall of the material collecting cover and the outer wall of the flotation column, a discharge pipe is connected to one side of the bottom of the discharge trough, and a scraper mechanism is installed on the top of the material collecting cover;

[0006] The first and second connecting rods are respectively provided with a first connecting rod and a second connecting rod which can rotate in opposite directions, and the first connecting rod is located above the second connecting rod, and the free end ends of the first connecting rod and the second connecting rod pass through and are rotatably connected to a screw. The outer wall of the lower end of the screw is threadedly connected to the first scraper adapted to fit the inner wall of the discharge trough, and the bottom of the first connecting rod and the second connecting rod are fixedly connected to a limit rod which cooperates with the first scraper. The outer wall of the upper end of the screw is respectively provided with a rotating gear and a limit gear through a one-way bearing, and the limit gear is located under the rotating gear, and the outer wall of the screw is sleeved with a torsion spring, and both ends of the torsion spring are respectively connected with the outer wall of the screw and the limit gear, and the tops of the first connecting rod and the second connecting rod are both provided with a locking member for locking the limit gear.

[0007] The inner wall of the material collection cover is provided with an arc-shaped rack that cooperates with the rotating gear, and the arc-shaped rack is located above the discharge pipe. The two rotating gears are meshed with the arc-shaped rack to drive the first scraper to rise above the discharge trough. The inner wall of the material collection cover is provided with an arc-shaped extrusion strip that cooperates with the locking piece, and the arc-shaped extrusion strip and the arc-shaped rack are arranged opposite to each other. When the locking piece abuts against the arc-shaped extrusion strip, the locking piece disengages from the limiting gear.

[0008] Preferably, the scraper mechanism also includes a second rotating shaft, and the second rotating shaft is coaxially arranged on the inner wall of the first rotating shaft and is rotatably connected to the first rotating shaft. The bottom of the second rotating shaft passes through the bottom of the first rotating shaft and is fixedly connected to a second scraper that cooperates with the top discharge port of the flotation column. The first rotating shaft is connected to a driving assembly, and the driving assembly drives the first rotating shaft to rotate uninterruptedly.

[0009] Preferably, the driving assembly includes a driving motor, and a driving bevel gear and an incomplete bevel gear are fixedly connected to the output end of the driving motor, two first driven bevel gears are symmetrically fixedly connected to the outer wall of the first rotating shaft, and the incomplete bevel gear is located between the two first driven bevel gears and meshingly connected with the two first driven bevel gears, the top of the second rotating shaft passes through the top of the first rotating shaft and is installed with a second driven bevel gear, and the second driven bevel gear is meshingly connected with the driving bevel gear.

[0010] Preferably, the locking member includes a sliding block slidably connected to the first connecting rod and the second connecting rod, and the end of the sliding block close to the arc extrusion strip is an inclined surface, the sliding block is provided with a limiting groove that cooperates with the limiting gear, and the limiting gear is located inside the limiting groove, and the inner wall of the limiting groove at one end away from the arc extrusion strip is arc-shaped and is provided with a limiting tooth that cooperates with the limiting gear.

[0011] Preferably, the locking member also includes a limit block fixedly connected to the top of the first connecting rod and the second connecting rod, the sliding block is symmetrically provided with abutment blocks on both side walls thereof, a sliding rod is slidably connected between the limit block and the two abutment blocks, and a spring is sleeved on the outer wall of the sliding rod.

[0012] Preferably, the first connecting rod is connected to the first rotating shaft via a gear transmission member;

[0013] The gear transmission member includes two rotating disks rotatably connected to the first rotating shaft, a rotating ring is rotatably connected between the two rotating disks, an inner gear ring is fixedly connected to the inner wall of the rotating ring, a driving gear is fixedly connected to the outer wall of the first rotating shaft, the rotating disk located below is rotatably connected to a transition gear, and the driving gear, the transition gear and the inner gear ring are meshed and connected in sequence.

[0014] Preferably, a fixing rod is fixedly connected to the top of the inner cavity of the collecting cover, and the fixing rod is fixedly connected to the rotating disk above.

[0015] Preferably, the cross-sectional shape of the first scraper is L-shaped, and the bending portions of the two first scrapers are both located at the top and bent in directions away from each other, and a threaded sleeve that cooperates with the screw is fixedly connected to the top of the bending portion of the first scraper.

[0016] Preferably, a cleaning block abutting against the top of the flotation column is provided on one side of the bent portion of the two first scrapers.

[0017] Preferably, a chamfer is provided at a portion where the discharge pipe is connected to the discharge trough.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention can drive the first rotating shaft to rotate through the driving component, so that the two first scrapers rotate in opposite directions, so that the foam collected in the discharge trough is pushed toward the discharge pipe, so that the foam can quickly flow to the discharge pipe and be discharged for collection. After the material is pushed into place, the scraper can be raised above the discharge trough through the mutual cooperation of the rotating gear and the arc-shaped rack, and then the two first scrapers are rotated in the opposite direction to the initial position, and after reaching the initial position, the locking member is pushed by the arc-shaped extrusion strip to unlock the limit gear, so that the limit gear and the screw can rotate in opposite directions under the action of the torsion spring restoring force, thereby causing the first scraper to descend to a position abutting against the bottom of the discharge trough, and finally the scraping operation is performed. The entire scraping process can not only reciprocate and continuously scrape the foam toward the discharge pipe to increase the discharge speed of the foam and avoid foam accumulation, but also will not cause the foam to flow to a position away from the discharge pipe during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the flotation column of the present invention;

[0022] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a flotation column of the present invention;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0024] Figure 4 It is a structural schematic diagram of the scraper mechanism in the flotation column of the present invention;

[0025] Figure 5It is a structural schematic diagram of a locking member and its connecting parts in a flotation column of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the gear transmission member in the flotation column of the present invention;

[0027] Figure 7 It is a schematic cross-sectional structure diagram of a material collecting cover in a flotation column of the present invention at a first angle;

[0028] Figure 8 It is a schematic diagram of the cross-sectional structure of the material collecting cover in the flotation column of the present invention at a second angle.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Flotation column; 2. Collecting cover; 21. Arc rack; 22. Arc extrusion strip; 3. Discharge trough; 4. Discharge pipe; 5. Scraper mechanism; 51. Drive assembly; 5101. Drive motor; 5102. Active bevel gear; 5103. Incomplete bevel gear; 5104. First driven bevel gear; 5105. Second driven bevel gear; 52. First rotating shaft; 53. First connecting rod; 54. Second connecting rod; 55. Screw; 56. First scraper; 561. Threaded sleeve; 562. Cleaning block; 57. Limit rod ; 58. rotating gear; 59. limiting gear; 510. torsion spring; 511. locking member; 5111. sliding block; 5112. limiting groove; 5113. limiting tooth; 5114. limiting block; 5115. abutment block; 5116. sliding rod; 5117. spring; 512. second rotating shaft; 513. second scraper; 514. gear transmission member; 5141. rotating disk; 5142. rotating ring; 5143. inner gear ring; 5144. driving gear; 5145. transition gear; 5146. fixing rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-8 As shown: One embodiment of the present invention is:

[0033] like Figure 1As shown, a graphite black powder micro-bubble flotation device comprises a flotation column 1, a collecting cover 2 is installed on the top of the flotation column 1, and the bottom of the collecting cover 2 is located below the top opening of the flotation column 1 and has a flat bottom structure, a discharge trough 3 is formed between the inner wall of the collecting cover 2 and the outer wall of the flotation column 1, a discharge pipe 4 is connected to one side of the bottom of the discharge trough 3, and a scraper mechanism 5 is installed on the top of the collecting cover 2;

[0034] like Figure 2 and 3 As shown, the scraper mechanism 5 includes a driving assembly 51, the driving assembly 51 is connected to a first rotating shaft 52, and the driving assembly 51 drives the first rotating shaft 52 to rotate back and forth, one end of the first rotating shaft 52 passes through the top of the collecting cover 2 and is respectively installed with a first connecting rod 53 and a second connecting rod 54 that can rotate in opposite directions, and the first connecting rod 53 is located above the second connecting rod 54, and the free ends of the first connecting rod 53 and the second connecting rod 54 are penetrated and rotatably connected with a screw 55, and the outer wall of the lower end of the screw 55 is threadedly connected with a screw that is suitable for the inner wall of the discharge trough 3. The first scraper 56 is equipped with a first connecting rod 53, and the bottom of the second connecting rod 54 is fixedly connected with a limit rod 57 that cooperates with the first scraper 56. The outer wall of the upper end of the screw rod 55 is respectively installed with a rotating gear 58 and a limit gear 59 through a one-way bearing, and the limit gear 59 is located below the rotating gear 58. The outer wall of the screw rod 55 is sleeved with a torsion spring 510, and the two ends of the torsion spring 510 are respectively connected to the outer wall of the screw rod 55 and the limit gear 59. The top of the first connecting rod 53 and the second connecting rod 54 are both installed with a locking member 511 for locking the limit gear 59;

[0035] like Figure 2 and 8 As shown, the inner wall of the collecting cover 2 is provided with an arc-shaped rack 21 which cooperates with the rotating gear 58, and the arc-shaped rack 21 is located above the discharge pipe 4. The two rotating gears 58 are meshed with the arc-shaped rack 21 to drive the first scraper 56 to rise above the discharge trough 3. The inner wall of the collecting cover 2 is provided with an arc-shaped extrusion strip 22 which cooperates with the locking piece 511, and the arc-shaped extrusion strip 22 is arranged opposite to the arc-shaped rack 21. When the locking piece 511 abuts against the arc-shaped extrusion strip 22, the locking piece 511 disengages from the limiting gear 59.

[0036] like Figure 4 As shown, in this embodiment, the scraper mechanism 5 also includes a second rotating shaft 512, and the second rotating shaft 512 is coaxially arranged on the inner wall of the first rotating shaft 52 and is rotatably connected to the first rotating shaft 52. The bottom of the second rotating shaft 512 passes through the bottom of the first rotating shaft 52 and is fixedly connected to a second scraper 513 that cooperates with the top discharge port of the flotation column 1. The first rotating shaft 52 is connected to the driving assembly 51, and the driving assembly 51 drives the first rotating shaft 52 to rotate continuously.

[0037] like Figure 3As shown, in order to realize the forward and reverse reciprocating rotation of the first scraper and the uninterrupted rotation of the second scraper, the driving assembly 51 includes a driving motor 5101, and the output end of the driving motor 5101 is fixedly connected to a driving bevel gear 5102 and an incomplete bevel gear 5103. The outer wall of the first rotating shaft 52 is symmetrically fixedly connected to two first driven bevel gears 5104, and the incomplete bevel gear 5103 is located between the two first driven bevel gears 5104 and meshed with the two first driven bevel gears 5104. The second rotating shaft 512 is connected to the top of the second rotating shaft 512. The second driven bevel gear 5105 is installed on the top of the first rotating shaft 52, and the second driven bevel gear 5105 is meshed with the active bevel gear 5102, wherein the driving motor drives the active bevel gear and the incomplete bevel gear to rotate at the same time, and the active bevel gear drives the second driven bevel gear to rotate, so that the second scraper rotates continuously to scrape the material, and the incomplete bevel gear meshes with the two first driven bevel gears in turn, which can drive the first rotating shaft to rotate in the forward and reverse directions in turn, thereby realizing the forward and reverse reciprocating rotation of the first rotating shaft.

[0038] like Figure 4 and 5 As shown, in this embodiment, the locking member 511 includes a sliding block 5111 that is slidably connected to the first connecting rod 53 and the second connecting rod 54, and the end of the sliding block 5111 close to the arc extrusion strip 22 is an inclined surface, and the sliding block 5111 is provided with a limiting groove 5112 that cooperates with the limiting gear 59, and the limiting gear 59 is located inside the limiting groove 5112, and the inner wall of the limiting groove 5112 at one end away from the arc extrusion strip 22 is arc-shaped and is provided with a limiting tooth 5113 that cooperates with the limiting gear 59, wherein when the inclined surface at the end of the sliding block abuts against the arc extrusion strip (and the arc extrusion strip is provided with a protrusion that cooperates with the sliding block), the sliding block can be pushed to slide, so that the limiting tooth is disengaged from the contact with the limiting gear, thereby allowing the limiting gear to rotate freely.

[0039] like Figure 5 As shown, in this embodiment, the locking member 511 also includes a limit block 5114 fixedly connected to the top of the first connecting rod 53 and the second connecting rod 54, and abutment blocks 5115 are symmetrically arranged on the opposite side walls of the sliding block 5111. A sliding rod 5116 is slidably connected between the limit block 5114 and the two abutment blocks 5115, and a spring 5117 is sleeved on the outer wall of the sliding rod 5116. After the sliding block is separated from the arc extrusion strip, the sliding block can return to its original position under the action of the spring restoring force, so that the limit tooth re-clamps and fixes the limit gear, and the setting of the sliding rod can ensure the stability of the sliding of the sliding block, so that the sliding block can slide in a straight line without deviation.

[0040] like Figure 6As shown, in this embodiment, in order to enable the first connecting rod and the second connecting rod to rotate in opposite directions, the first connecting rod 53 is connected to the first rotating shaft 52 via a gear transmission member 514;

[0041] The gear transmission member 514 includes two rotating disks 5141 rotatably connected to the first rotating shaft 52, a rotating ring 5142 is rotatably connected between the two rotating disks 5141, an inner gear ring 5143 is fixedly connected to the inner wall of the rotating ring 5142, a driving gear 5144 is fixedly connected to the outer wall of the first rotating shaft 52, and the rotating disk 5141 located below is rotatably connected to the transition gear 5145, and the driving gear 5144, the transition gear 5145 and the inner gear ring 5143 are meshed and connected in sequence, wherein when the first rotating shaft rotates, it can directly drive the second connecting rod and the driving gear to rotate, and the driving gear drives the inner gear ring to rotate in the opposite direction through the transition gear, so that the first connecting rod and the second connecting rod rotate in opposite directions, thereby realizing all-round cleaning of the discharge trough by the first scraper.

[0042] like Figure 6 As shown, in this embodiment, in order to ensure the stability of the installation of the gear transmission component, a fixing rod 5146 is fixedly connected to the top of the inner cavity of the collecting cover 2, and the fixing rod 5146 is fixedly connected to the rotating disk 5141 above, wherein the fixing rod can fix the rotating disk located above to ensure the stability of the rotating disk, thereby ensuring the overall stability of the gear transmission component.

[0043] like Figure 4 As shown, in this embodiment, in order to enable the two first scrapers to clean the inside of the discharge trough in all directions, the cross-sectional shape of the first scraper 56 is L-shaped, and the bending portions of the two first scrapers 56 are located at the top and bent in the direction away from each other, and the top of the bending portion of the first scraper 56 is fixed with a threaded sleeve 561 that cooperates with the screw 55, so that the first scraper can be eccentrically arranged, so that when the two scrapers are close to each other, their backs can be tightly attached to each other, so that the scraping range is larger, and when scraping, the bending portion can prevent foam from flowing out from above the scraper.

[0044] like Figure 4 As shown, in this embodiment, a cleaning block 562 abutting against the top of the flotation column 1 is provided on one side of the bent portion of the two first scrapers 56. The cleaning block can scrape off the material accumulated on the top edge of the flotation column.

[0045] like Figure 7 As shown, in this embodiment, a chamfer is provided at the portion where the discharge pipe 4 is connected to the discharge trough 3, and the cross-sectional shape of the discharge pipe is an arc coaxially arranged with the discharge trough. Setting the chamfer can increase the connection area between the discharge pipe and the discharge trough and increase the discharge speed.

[0046] At the same time, the top of the collecting cover 2 in this embodiment is set as a through structure, so that the working conditions inside the collecting cover can be easily observed, and the installation of the driving component is fixed by a bracket.

[0047] The specific working process of this embodiment is as follows:

[0048] The graphite black powder after multiple stages of water washing is injected into the flotation column through the slurry inlet pipe, and air bubbles are injected into the flotation column from the bottom, so that during the rising process of the bubbles, they come into contact with the graphite black powder in the slurry and carry the graphite black powder upward, and form a mineralized foam layer after flowing to the top of the flotation column (the flotation principle of the flotation column has not been improved in this application, and its specific principle refers to the prior art).

[0049] During the flotation process, the driving motor 5101 is started, and the driving motor 5101 drives the active bevel gear 5102 and the incomplete bevel gear 5103 to rotate synchronously, and the active bevel gear 5102 drives the second driven bevel gear 5105 to rotate, thereby driving the second rotating shaft 512 and the second scraper 513 to rotate, and the mineralized foam layer formed on the flotation column 1 is scraped into the discharge trough 3 by the second scraper 513, and the incomplete bevel gear 5103 first drives the upper first driven bevel gear 5104 to rotate, so as to drive the first rotating shaft 52 to rotate in the positive direction, and the positive rotation of the first rotating shaft 52 drives the second connecting rod 54 and the active gear 5144 to rotate, wherein the active gear 5144 drives the inner gear ring 5143 to rotate in the opposite direction through the transition gear 5145, thereby driving the first connecting rod 53 and the second connecting rod 54 to rotate in opposite directions;

[0050] When the first connecting rod 53 and the second connecting rod 54 rotate, the two first scrapers 56 are driven to rotate to scrape the foam in the discharge trough 3 toward the discharge pipe 4, so that the foam can quickly flow to the discharge pipe 4 and be discharged for collection. When the first connecting rod 53 and the second connecting rod 54 gradually approach each other (the first scraper 56 gradually approaches the discharge pipe 4), the rotating gear 58 gradually meshes with the arc-shaped rack 21, and during the rotation of the rotating gear 58, since the rotating gear 58 is connected to the screw rod 55 through a one-way bearing, the rotating gear 58 is The wheel 58 can drive the screw 55 to rotate synchronously, thereby driving the first scraper 56 to gradually rise until it slides out of the height of the discharge trough 3; and during the rotation of the rotating gear 58, the torsion spring 510 can be driven to rotate through the screw 55 (the limit gear 59 and the screw 55 are rotatably connected through a one-way bearing, so when the screw 55 rotates, the inner ring of the one-way bearing can be driven to rotate without driving the limit gear 59 to rotate), and because the limit gear 59 is locked and fixed by the locking member 511, the torsion spring 510 is in a state of torsion storage;

[0051] After the first scraper 56 has scraped the material into place, the incomplete bevel gear 5103 meshes with the first driven bevel gear 5104 located below to drive the first rotating shaft 52 to rotate in the opposite direction, so that the two first scrapers 56 slide toward the initial position. Since the first scraper 56 is above the discharge chute 3 at this time, the rotation of the first scraper 56 will not drive the foam to flow. At the same time, since the rotating gear 58 and the screw 55 are connected by a one-way bearing, when the first scraper 56 rotates back, the meshing of the rotating gear 58 and the arc-shaped rack 21 can only cause the rotating gear 58 to rotate idly without driving the screw 55 to rotate. After the first scraper 56 gradually rotates into place, the inclined surface of the sliding block 5111 It gradually contacts the protrusion of the arc-shaped extrusion strip 22, causing the sliding block 5111 to slide, thereby disengaging the limit tooth 5113 from the limit gear 59, allowing the limit gear 59 to rotate freely, thereby rotating under the action of the restoring force of the torsion spring 510, and driving the screw 55 to rotate synchronously under the action of the one-way bearing, so that the first scraper 56 descends and contacts the bottom of the discharge trough 3, and at this time, one side of the two first scrapers 56 abuts against each other, and then the incomplete bevel gear 5103 engages with the first driven bevel gear 5104 above, driving the first rotating shaft 52 to rotate in the forward direction, and the discharge trough 3 is repeatedly scraped in this way to avoid foam accumulation in the discharge trough 3.

[0052] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A graphite black powder microbubble flotation device, comprising a flotation column (1), characterized in that: A material collecting cover (2) is installed on the top of the flotation column (1), and the bottom of the material collecting cover (2) is located below the top opening of the flotation column (1) and has a flat bottom structure. A discharge trough (3) is formed between the inner wall of the material collecting cover (2) and the outer wall of the flotation column (1). A discharge pipe (4) is connected to one side of the bottom of the discharge trough (3). A scraper mechanism (5) is installed on the top of the material collecting cover (2); The scraper mechanism (5) comprises a driving assembly (51), the driving assembly (51) being connected to a first rotating shaft (52), and the driving assembly (51) drives the first rotating shaft (52) to rotate back and forth, one end of the first rotating shaft (52) passes through the top of the collecting cover (2) and is respectively provided with a first connecting rod (53) and a second connecting rod (54) which can rotate in opposite directions, and the first connecting rod (53) is located above the second connecting rod (54), the free ends of the first connecting rod (53) and the second connecting rod (54) are penetrated by screw rods (55) which are rotatably connected, and the outer wall of the lower end of the screw rod (55) is threadedly connected to a screw rod which is adapted to the inner wall of the discharge trough (3). a first scraper (56), a limiting rod (57) which cooperates with the first scraper (56) being fixedly connected to the bottom of the first connecting rod (53) and the second connecting rod (54), a rotating gear (58) and a limiting gear (59) being respectively installed on the outer wall of the upper end of the screw rod (55) via a one-way bearing, and the limiting gear (59) is located below the rotating gear (58), a torsion spring (510) is sleeved on the outer wall of the screw rod (55), and two ends of the torsion spring (510) are respectively connected to the outer wall of the screw rod (55) and the limiting gear (59), and a locking member (511) for locking the limiting gear (59) is installed on the top of the first connecting rod (53) and the second connecting rod (54); The inner wall of the collecting cover (2) is provided with an arc-shaped rack (21) that cooperates with the rotating gear (58), and the arc-shaped rack (21) is located above the discharge pipe (4). The two rotating gears (58) are meshed with the arc-shaped rack (21) to drive the first scraper (56) to rise above the discharge trough (3). The inner wall of the collecting cover (2) is provided with an arc-shaped extrusion strip (22) that cooperates with the locking member (511), and the arc-shaped extrusion strip (22) is arranged opposite to the arc-shaped rack (21). When the locking member (511) abuts against the arc-shaped extrusion strip (22), the locking member (511) is separated from the limiting gear (59); The scraper mechanism (5) further comprises a second rotating shaft (512), and the second rotating shaft (512) is coaxially arranged on the inner wall of the first rotating shaft (52) and is rotatably connected to the first rotating shaft (52); the bottom of the second rotating shaft (512) passes through the bottom of the first rotating shaft (52) and is fixedly connected to a second scraper (513) that cooperates with the top discharge port of the flotation column (1); the first rotating shaft (52) is connected to the driving assembly (51), and the driving assembly (51) drives the first rotating shaft (52) to rotate continuously; The driving assembly (51) comprises a driving motor (5101), the output end of the driving motor (5101) is fixedly connected to a driving bevel gear (5102) and an incomplete bevel gear (5103), the outer wall of the first rotating shaft (52) is symmetrically fixedly connected to two first driven bevel gears (5104), the incomplete bevel gear (5103) is located between the two first driven bevel gears (5104) and is meshingly connected to the two first driven bevel gears (5104), the top of the second rotating shaft (512) passes through the top of the first rotating shaft (52) and is installed with a second driven bevel gear (5105), and the second driven bevel gear (5105) is meshingly connected to the driving bevel gear (5102); The locking member (511) comprises a sliding block (5111) slidably connected to the first connecting rod (53) and the second connecting rod (54), and the end of the sliding block (5111) close to the arc-shaped extrusion strip (22) is an inclined surface, the sliding block (5111) is provided with a limiting groove (5112) that cooperates with the limiting gear (59), and the limiting gear (59) is located inside the limiting groove (5112), and the inner wall of the end of the limiting groove (5112) away from the arc-shaped extrusion strip (22) is arc-shaped and is provided with a limiting tooth (5113) that cooperates with the limiting gear (59); The locking member (511) further comprises a limit block (5114) fixedly connected to the top of the first connecting rod (53) and the second connecting rod (54); abutment blocks (5115) are symmetrically arranged on two opposite side walls of the sliding block (5111); a sliding rod (5116) is slidably connected between the limit block (5114) and the two abutment blocks (5115); and a spring (5117) is sleeved on the outer wall of the sliding rod (5116).

2. A graphite black powder microbubble flotation device according to claim 1, characterized in that: The first connecting rod (53) and the first rotating shaft (52) are connected via a gear transmission member (514); The gear transmission member (514) comprises two rotating disks (5141) rotatably connected to the first rotating shaft (52); a rotating ring (5142) is rotatably connected between the two rotating disks (5141); an inner gear ring (5143) is fixedly connected to the inner wall of the rotating ring (5142); a driving gear (5144) is fixedly connected to the outer wall of the first rotating shaft (52); the rotating disk (5141) located at the bottom is rotatably connected to a transition gear (5145); and the driving gear (5144), the transition gear (5145) and the inner gear ring (5143) are meshed and connected in sequence.

3. A graphite black powder microbubble flotation device according to claim 2, characterized in that: A fixing rod (5146) is fixedly connected to the top of the inner cavity of the collecting cover (2), and the fixing rod (5146) is fixedly connected to the rotating disk (5141) above.

4. A graphite black powder microbubble flotation device according to claim 1, characterized in that: The cross-sectional shape of the first scraper (56) is L-shaped, and the bent portions of the two first scrapers (56) are both located at the top and bent in a direction away from each other, and a threaded sleeve (561) that cooperates with the screw rod (55) is fixedly connected to the top of the bent portion of the first scraper (56).

5. A graphite black powder microbubble flotation device according to claim 4, characterized in that: A cleaning block (562) abutting against the top of the flotation column (1) is provided on one side of the bent portion of the two first scrapers (56).

6. A graphite black powder microbubble flotation device according to claim 1, characterized in that: A chamfer is provided at the portion where the discharge pipe (4) is connected to the discharge trough (3).

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