Device for replacing side stirrer mechanical seal without stopping desulfurizing tower

Abstract

The utility model relates to the technical field of desulfurizing towers, in particular to a device for replacing a mechanical seal of a side stirrer without stopping the desulfurizing tower, which comprises the desulfurizing tower, a stirrer transmission shaft and a transmission shaft outer cover are arranged on the side wall of the desulfurizing tower, and the mechanical seal is connected between the desulfurizing tower and the stirrer transmission shaft. The part of the stirrer transmission shaft in the desulfurization tower is fixedly connected with a sealing block; the chuck can be clamped with a transmission shaft of the stirrer; the outer side of the stirrer transmission shaft is connected with a first mounted bearing and a clamp spring for limiting the first mounted bearing; an inner flange is arranged in the transmission shaft outer cover, and a detachable access door is arranged on the front side; the first mounted bearing is detachably connected with the inner flange, at least three through first threaded holes are uniformly formed in the edge of the first mounted bearing, and first ejection bolts are connected into the first threaded holes; according to the utility model, the transmission shaft can be positioned after the transmission shaft of the stirrer is pulled out during on-line replacement of the mechanical seal; it can be guaranteed that slurry in the desulfurizing tower does not leak.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization towers, in particular to a device for replacing a side agitator mechanical seal of a desulfurization tower without stopping the tower. Background Art

[0002] The side agitator used in the desulfurization tower in the desulfurization purification system workshop of the electrolytic aluminum industry will cause damage to the mechanical seal due to long-term operation, resulting in slurry leakage. According to normal procedures, the tower needs to be stopped for replacement, which has a great impact on production.

[0003] The patent with application number 201820870222.2 discloses an online replacement device for mechanical seals, at least two non-intersecting and through reserved connecting holes are opened on the side walls of the first semicircular chuck and the second semicircular chuck, and the two reserved connecting holes are respectively arranged on both sides of the circular groove formed by the first semicircular chuck and the reserved connecting holes, and a detachable locking part is arranged in the reserved hole; the outer side of the sealing block is pulled out by the transmission shaft, so that the sealing block and the sealing groove opened on the side wall of the desulfurization slurry system are adapted to seal; the sealing chuck is clamped on the transmission shaft and fixed to the side wall of the desulfurization slurry system with a locking nut, and then the mechanical seal is replaced.

[0004] The disadvantages of the patent with application number 201820870222.2 are: 1. When the mechanical seal is replaced online, it is not known how to position the drive shaft after it is pulled out; 2. After the sealing chuck is installed, the compression between the sealing block and the side wall of the desulfurization slurry system cannot be maintained. Utility Model Content

[0005] The main purpose of the utility model is to provide a device for replacing the mechanical seal of the side agitator of a desulfurization tower without stopping the tower, so as to solve the problems in the above-mentioned prior art that when the mechanical seal is replaced online, it is not known how to position the drive shaft after it is pulled out, and the sealing chuck cannot continue to maintain the tightness between the sealing block and the side wall of the desulfurization slurry system after installation.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a device for replacing the mechanical seal of the side agitator of a desulfurization tower without stopping the tower, comprising a desulfurization tower, an agitator drive shaft and a drive shaft outer cover installed on the side wall of the desulfurization tower, a mechanical seal connected between the desulfurization tower and the agitator drive shaft, and a sealing block fixedly connected to the part of the agitator drive shaft located in the desulfurization tower; further comprising a chuck that can be engaged with the agitator drive shaft; a first seat bearing and a retaining spring for limiting the first seat bearing are connected to the outside of the agitator drive shaft; an inner flange is provided inside the drive shaft outer cover, and a detachable inspection door is provided on the front side; the first seat bearing is detachably connected to the inner flange, and at least 3 through-going first threaded holes are evenly provided on the edge of the first seat bearing, and a first ejection bolt is connected in the first threaded hole.

[0007] Furthermore, the chuck includes an upper chuck and a lower chuck connected by bolts; the chuck is provided with at least three second threaded holes passing through the left and right sides thereof, and second ejection bolts are connected in the second threaded holes.

[0008] Furthermore, a detachable outer end cover is provided on the side of the drive shaft cover away from the desulfurization tower, and the outer side of the agitator drive shaft is connected to a second seat bearing, and the second seat bearing is detachably connected to the outer end cover.

[0009] Furthermore, a motor mounting bracket is fixedly connected to the top of the transmission shaft housing, a motor is fixedly connected to the motor mounting bracket, and the motor and the agitator transmission shaft are connected via a belt drive.

[0010] The utility model provides a first seat bearing with a threaded hole and a first ejector bolt, so that the drive shaft of the agitator can be positioned after the machine seal is replaced online and the drive shaft is pulled outward; by providing a threaded hole and a second ejector bolt on the chuck, the compression between the sealing block and the desulfurization tower can be maintained by the ejector bolt after the chuck is installed, thereby ensuring that the slurry inside the desulfurization tower does not leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0012] Figure 1 This is a schematic structural diagram of the mechanical seal of the embodiment before disassembly;

[0013] Figure 2 Schematic diagram of the structure of the mechanical seal during disassembly in the embodiment;

[0014] Figure 3 A schematic structural diagram of a chuck in an embodiment;

[0015] Figure 4 Schematic diagram of the structure of the first seat bearing in the embodiment;

[0016] In the figure: 1. Desulfurization tower; 2. Agitator drive shaft; 3. Sealing block; 4. Chuck; 401. Upper chuck; 402. Lower chuck; 403. Second threaded hole; 5. Drive shaft cover; 501. Inner flange; 502. Outer end cover; 6. First seat bearing; 601. First threaded hole; 602. Connecting hole; 7. Retaining spring; 8. First ejection bolt; 9. Second ejection bolt; 10. Second seat bearing; 11. Mechanical seal; 12. Motor mounting bracket; 13. Motor; 14. Belt. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] like Figures 1 to 4 As shown, according to an embodiment of the utility model, a device for replacing the mechanical seal of the side agitator of a desulfurization tower without stopping the tower is provided, comprising a desulfurization tower 1, an agitator drive shaft 2 and a drive shaft cover 5 installed on the side wall of the desulfurization tower 1, a mechanical seal 11 is connected between the desulfurization tower 1 and the agitator drive shaft 2, and the part of the agitator drive shaft 2 located in the desulfurization tower 1 is fixedly connected to a sealing block 3; it also includes a chuck 4 that can be clamped with the agitator drive shaft 2; the outer side of the agitator drive shaft 2 is connected to a first seat bearing 6 and a retaining spring 7 for limiting the first seat bearing 6.

[0019] An inner flange 501 is provided inside the transmission shaft outer cover 5, and a detachable inspection door is provided on the front side; a plurality of connecting holes 602 and at least three through-going first threaded holes 601 are evenly provided on the edge of the first seat bearing 6; the first seat bearing 6 is detachably connected to the inner flange 501 through bolts and the connecting holes 602, and a first ejection bolt 8 is connected to the first threaded hole 601; the bolt in the connecting hole 602 is removed, and the first ejection bolt 8 is rotated so that the first ejection bolt 8 can be pressed against the flange 501; the agitator transmission shaft 2 can be positioned.

[0020] The chuck 4 includes an upper chuck 401 and a lower chuck 402 connected by bolts; the chuck 4 is provided with at least three second threaded holes 403 passing through the left and right sides thereof, and the second threaded holes 403 are connected with second ejection bolts 9; after the chuck 4 is clamped on the agitator drive shaft 2, the second ejection bolts 9 are rotated so that the second ejection bolts 9 are pressed against the outer wall of the desulfurization tower 1, and the agitator drive shaft 2 can be pulled outward under the action of the chuck 4, so that the sealing block 3 and the inner wall of the desulfurization tower 1 are pressed and sealed.

[0021] A detachable outer end cover 502 is provided on the side of the drive shaft outer cover 5 away from the desulfurization tower 1. The outer side of the agitator drive shaft 2 is connected to the second seat bearing 10, and the second seat bearing 10 is detachably connected to the outer end cover 502 by bolts.

[0022] A motor mounting bracket 12 is fixedly connected to the top of the transmission shaft outer cover 5 , and a motor 13 is fixedly connected to the motor mounting bracket 12 . The motor 13 and the agitator transmission shaft 2 are connected through a belt 14 .

[0023] The steps for replacing the mechanical seal of the side agitator of the desulfurization tower without stopping the tower are:

[0024] First, stop the motor 13, and remove the belt 14, the second seat bearing 10, and the outer end cover 502;

[0025] Next, remove the bolts connecting the first seat bearing 6 and the inner flange 501, and connect the first ejector bolt 8 to the first seat bearing 6; rotate the first ejector bolt 8 so that it presses against the flange 501; remove the connecting bolts between the mechanical seal 11 and the desulfurization tower 1; quickly pull out the agitator drive shaft 2 so that the sealing block 3 and the inner wall of the desulfurization tower 1 are tightly attached; continue to rotate the first ejector bolt 8 so that it presses against the flange 501, so that the sealing block 3 and the inner wall of the desulfurization tower 1 are pressed and sealed;

[0026] Then, install the chuck 4 on the agitator drive shaft 2 near the outer wall of the desulfurization tower 1; after the chuck 4 is clamped on the agitator drive shaft 2, rotate the second ejector bolt 9 so that the second ejector bolt 9 presses against the outer wall of the desulfurization tower 1, thereby maintaining the sealing block 3 and the inner wall of the desulfurization tower 1 tightly sealed;

[0027] Next, remove the retaining ring 7, the first bearing block 6, and the mechanical seal 11; put the new mechanical seal 11 on the agitator drive shaft 2, install the first bearing block 6 and retaining ring 7, and turn the first ejector bolt 8 to keep the sealing block 3 and the inner wall of the desulfurization tower 1 tightly sealed; remove the chuck 4 and install the new mechanical seal 11;

[0028] Finally, remove the first ejector bolt 8, push the agitator drive shaft 2 inward, so that the new mechanical seal 11 is in a position to seal the desulfurization tower 1, and fix the first seat bearing 6 to the inner flange 501; install the second seat bearing 10, the outer end cover 502 and the belt 14.

[0029] This embodiment provides a first seat bearing 6 with a threaded hole and a first ejector bolt 8, so that the drive shaft can be positioned after the agitator drive shaft 2 is pulled out when the mechanical seal is replaced online; by providing a threaded hole and a second ejector bolt 9 on the chuck 4, the ejector bolt can maintain the compression between the sealing block 3 and the desulfurization tower 1 after the chuck 4 is installed, thereby ensuring that the slurry inside the desulfurization tower 1 does not leak.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for replacing a side agitator mechanical seal of a desulfurization tower without stopping the tower, comprising a desulfurization tower (1), a side wall of the desulfurization tower (1) being provided with an agitator drive shaft (2) and a drive shaft cover (5), a mechanical seal (11) being connected between the desulfurization tower (1) and the agitator drive shaft (2), a sealing block (3) being fixedly connected to a portion of the agitator drive shaft (2) located inside the desulfurization tower (1), and further comprising a chuck (4) capable of being engaged with the agitator drive shaft (2); characterized in that: The outer side of the agitator drive shaft (2) is connected to a first seat bearing (6) and a retaining spring (7) for limiting the first seat bearing (6); an inner flange (501) is provided inside the drive shaft outer cover (5), and a detachable inspection door is provided on the front side; the first seat bearing (6) is detachably connected to the inner flange (501), and at least three through-going first threaded holes (601) are evenly provided on the edge of the first seat bearing (6), and a first ejection bolt (8) is connected inside the first threaded hole (601).

2. The device for replacing the mechanical seal of the side agitator of the desulfurization tower without stopping the tower according to claim 1, characterized in that: The chuck (4) comprises an upper chuck (401) and a lower chuck (402) connected by bolts; the chuck (4) is provided with at least three second threaded holes (403) passing through the left and right sides thereof, and second ejection bolts (9) are connected in the second threaded holes (403).

3. The device for replacing the mechanical seal of the side agitator of the desulfurization tower without stopping the tower according to claim 1, characterized in that: A detachable outer end cover (502) is provided on the side of the drive shaft outer cover (5) away from the desulfurization tower (1), and the outer side of the agitator drive shaft (2) is connected to a second seat bearing (10), and the second seat bearing (10) is detachably connected to the outer end cover (502).

4. The device for replacing the mechanical seal of the side agitator of the desulfurization tower without stopping the tower according to claim 1, characterized in that: The top of the transmission shaft outer cover (5) is fixedly connected to a motor mounting frame (12), the motor mounting frame (12) is fixedly connected to a motor (13), and the motor (13) and the agitator transmission shaft (2) are connected via a belt (14).

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