Long-service-life impeller cover plate for flotation machine

Abstract

The long-service-life impeller cover plate for the flotation machine relates to the technical field of impeller cover plates and comprises a disc and a plurality of stators, a plurality of circulating holes are formed in the disc, a plurality of mounting grooves matched with the stators in shape are formed in the circumference of the disc, first threaded holes are formed in the mounting grooves, and the mounting grooves correspond to the circulating holes one to one. A first counter bore is formed in the stator, and a fixing bolt in threaded connection with the first threaded hole is arranged in the first counter bore so as to realize split disassembly and assembly between the stator and the disc; when some stators are abraded or corroded heavily, the stators and the disc can be detached in a split mode, a new complete stator can be replaced immediately, the whole impeller cover plate does not need to be replaced, the maintenance cost is remarkably reduced, and replacement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of impeller covers, and more specifically, to a high - life impeller cover for a flotation machine. Background Technique

[0002] A flotation machine, short for a flotation separator, refers to the mechanical equipment for completing the flotation process. In a flotation machine, the pulp treated with reagents is agitated and aerated, so that some of the ore particles selectively adhere to the bubbles; they float to the surface of the pulp and are scraped out to form a foam product, while the rest remains in the pulp to achieve the purpose of separating minerals. An impeller and an impeller cover need to be installed inside the flotation machine.

[0003] An impeller cover is a protective part installed on the impeller. It is usually used to protect the impeller from damage and can improve the fluidity of the water flow. An impeller is a rotatable mechanical device that is usually used to accelerate or decelerate fluids or gases. The function of the impeller cover is to isolate the impeller from other mechanical components and protect the impeller from damage.

[0004] The existing impeller cover consists of a disc and stators. There are 18 - 20 stators circumferentially distributed on the disc and 18 - 20 corresponding circulation holes. The stators are inclined at a certain angle on the disc. Currently, the disc and the stators are integrally processed. However, during the use of the impeller cover, local stators may be severely worn or corroded. At this time, the whole impeller cover can only be disassembled and replaced, which is costly and does not allow for disassembly of parts for local replacement. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems raised in the above - mentioned background technique, and then a high - life impeller cover for a flotation machine is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A high - life impeller cover for a flotation machine includes a disc and a number of stators. A number of circulation holes are provided on the disc. A number of installation grooves adapted to the shape of the stators are circumferentially arranged on the disc. A first threaded hole is provided in the installation groove, and the installation groove corresponds to the circulation hole one by one. A first counterbore is provided on the stator, and a fixing bolt threadedly connected to the first threaded hole is arranged in the first counterbore to realize the disassembly and assembly of the stator and the disc.

[0008] When some stators are severely worn or corroded, this device can be disassembled from the disc, and then a new and intact stator can be replaced. There is no need to replace the whole impeller cover, which significantly reduces the maintenance cost and is convenient for replacement.

[0009] Further, a polyurethane shell is arranged outside the stator, and the bottom of the polyurethane shell is open. An installation hole communicating with the first sunken hole is formed in the polyurethane shell.

[0010] Further, a first plug is arranged on the installation hole.

[0011] The above solution can further improve the wear resistance and corrosion resistance of the stator by arranging the polyurethane shell outside the stator, prolong the service life. In addition, after the installation between the stator and the disc is completed, the first plug is used to block the installation hole to reduce the corrosion of the materials on the inside of the installation hole and the first sunken hole during the subsequent flotation process.

[0012] Further, a ceramic ring is further included. A plurality of second threaded holes are arranged circumferentially on the disc. The ceramic ring is circumferentially provided with first through holes that are adapted to the shape of the installation groove and correspond one by one, second through holes that communicate with the circulation holes and correspond one by one, and second sunken holes that correspond to the second threaded holes one by one. A fastening bolt that is threadedly connected to the second threaded hole is arranged in the second sunken hole for the disassembly and assembly of the ceramic ring and the disc.

[0013] Further, a second plug is arranged on the second sunken hole.

[0014] Further, a wear-resistant coating is arranged on the ceramic ring.

[0015] The above solution can further reduce the corrosion and wear of the materials on the surface of the disc by movably installing the ceramic ring on the disc, prolong the service life of the disc. When the ceramic ring is severely corroded or worn, only the ceramic ring needs to be disassembled and replaced, delaying the time interval for disassembling the disc. Similarly, in order to avoid the corrosion of the materials in the second sunken hole during the flotation process, the second plug is arranged.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] Compared with the prior art, when some stators of the present device are severely worn or corroded, they can be disassembled separately from the disc, and then a new and intact stator can be replaced. There is no need to replace the entire impeller cover plate, the maintenance cost is significantly reduced and the replacement is convenient, and the service life of the impeller cover plate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the schematic diagram of the first sunken hole;

[0020] Figure 3 is the schematic diagram of the cooperation between the polyurethane shell and the stator;

[0021] Figure 4 is the schematic diagram of the ceramic ring;

[0022] Reference Signs:

[0023] 1. Disc; 11. Mounting groove; 12. First threaded hole; 13. Circulation hole; 14. Second threaded hole; 2. Stator; 21. First counterbore; 22. Fixing bolt; 3. Polyurethane shell; 4. Ceramic ring; 41. First through hole; 42. Second through hole; 43. Second counterbore; 44. Fastening bolt. Detailed Embodiment

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The present invention will be further described in conjunction with the accompanying drawings and embodiments:

[0025] As Figures 1 to 4 shown, a high-service-life impeller cover for a flotation machine includes a disc 1 and a plurality of stators 2. A plurality of circulation holes 13 are formed in the disc 1. A plurality of mounting grooves 11 adapted to the shape of the stators 2 are circumferentially arranged on the disc 1. First threaded holes 12 are provided in the mounting grooves 11, and the mounting grooves 11 correspond to the circulation holes 13 one by one. First counterbores 21 are formed in the stators 2, and fixing bolts 22 threadedly connected to the first threaded holes 12 are arranged in the first counterbores 21 to realize the disassembly and assembly of the stators 2 and the disc 1.

[0026] The working process of the present invention:

[0027] First, the impeller is installed at the inner center of the impeller cover. The impeller is not shown in the figure and the connection method between the two belongs to the prior art and will not be described. After the two are connected, the driving device is then connected. After the driving device is connected, it can be put into use in the flotation machine for the flotation process of the sintering machine head ash slurry. As the impeller cover is put into use for a long time, at this time, problems such as corrosion and wear will occur to the stators 2. Then, several stators 2 with heavier wear and corrosion can be disassembled. After the disassembly is completed, new stators 2 can be locally replaced. The disassembly process is simple. Only the fixing bolts 22 of the stators 2 to be replaced need to be loosened in sequence. In this way, the local disassembly process between the disc 1 and the stators 2 can be realized, and it is not necessary to replace and disassemble the entire impeller cover at one time. At the same time, the disassembly of the stators 2 will not interfere with the installation of the impeller;

[0028] Compared with the prior art, when some stators 2 are severely worn or corroded, the device can be disassembled separately from the disc 1, and then a new and intact stator 2 can be replaced, without the need to replace the entire impeller cover plate, significantly reducing the maintenance cost and being convenient for replacement.

[0029] In some embodiments, as Figure 3 shown, a polyurethane shell 3 is provided on the outer side of the stator 2 and the bottom of the polyurethane shell 3 is open. An installation hole communicating with the first counterbore 21 is provided on the polyurethane shell 3, and the installation hole is not labeled in the figure.

[0030] For further optimization of the above embodiment solution, a first plug is provided on the installation hole, and the first plug is not shown in the figure. By providing the polyurethane shell 3 on the outer side of the stator 2 in this embodiment, the wear resistance and corrosion resistance of the stator 2 can be further improved, and the service life is extended. In addition, after the installation between the stator 2 and the disc 1 is completed, the first plug is used to block the installation hole to reduce the corrosion of the installation hole and the inside of the first counterbore 21 by the material during the subsequent flotation process.

[0031] In other embodiments, as Figure 4 shown, the device further includes a ceramic ring 4. The ceramic ring 4 will not interfere with the disassembly of the impeller either. A plurality of second threaded holes 14 are circumferentially provided on the disc 1. The ceramic ring 4 is circumferentially provided with first through holes 41 that are adapted to the shape of the installation groove 11 and correspond one by one, second through holes 42 that communicate with the circulation holes 13 and correspond one by one, and second counterbores 43 that correspond to the second threaded holes 14 one by one. A fastening bolt 44 that is threadedly connected to the second threaded hole 14 is provided in the second counterbore 43 for the disassembly and assembly of the ceramic ring 4 and the disc 1.

[0032] For further optimization of the above embodiment solution, a second plug is provided on the second counterbore 43 and a wear-resistant coating is provided on the ceramic ring 4. By movably installing the ceramic ring 4 on the disc 1 in this embodiment, the corrosion and wear of the surface of the disc 1 by the material can be further reduced, and the service life of the disc 1 is extended. When the ceramic ring 4 is severely corroded or worn, only the ceramic ring 4 needs to be disassembled and replaced, delaying the time interval for disassembling the disc 1. Similarly, in order to prevent the material from corroding the inside of the second counterbore 43 during the flotation process, a second plug is provided, and the second plug is not shown in the figure.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-life impeller cover plate for a flotation machine, comprising a disc (1) and a plurality of stators (2), wherein the disc (1) is provided with a plurality of circulation holes (13), characterized in that: A plurality of mounting grooves (11) matching the shape of the stator (2) are arranged on the circumference of the disc (1), a first threaded hole (12) is arranged in the mounting groove (11), and the mounting groove (11) corresponds to the circulation hole (13) one by one, a first countersunk hole (21) is opened on the stator (2), and a fixing bolt (22) threadedly connected to the first threaded hole (12) is arranged in the first countersunk hole (21) to realize the separation and disassembly between the stator (2) and the disc (1).

2. The long-life impeller cover plate for a flotation machine according to claim 1, characterized in that: A polyurethane shell (3) is arranged on the outside of the stator (2), and the bottom of the polyurethane shell (3) is open. A mounting hole communicating with the first countersunk hole (21) is provided on the polyurethane shell (3).

3. The long-life impeller cover plate for a flotation machine according to claim 2, characterized in that: The mounting hole is provided with a first plug.

4. The long-life impeller cover plate for a flotation machine according to claim 1, characterized in that: The invention also comprises a ceramic ring (4), a plurality of second threaded holes (14) are arranged on the circumference of the disc (1), a first through hole (41) which is matched with the shape of the mounting groove (11) and corresponds one to one, a second through hole (42) which is connected with the circulation hole (13) and corresponds one to one, and a second countersunk hole (43) which corresponds one to one with the second threaded hole (14), and a fastening bolt (44) which is threadedly connected with the second threaded hole (14) is arranged in the second countersunk hole (43) for separate assembly and disassembly between the ceramic ring (4) and the disc (1).

5. The long-life impeller cover plate for a flotation machine according to claim 4, characterized in that: A second plug is provided on the second countersunk hole (43).

6. The long-life impeller cover plate for a flotation machine according to claim 4, characterized in that: The ceramic ring (4) is provided with a wear-resistant coating.

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