CN211274516U - Shaft sealing device for AFT tower stirrer - Google Patents
Shaft sealing device for AFT tower stirrer Download PDFInfo
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- CN211274516U CN211274516U CN201921945428.8U CN201921945428U CN211274516U CN 211274516 U CN211274516 U CN 211274516U CN 201921945428 U CN201921945428 U CN 201921945428U CN 211274516 U CN211274516 U CN 211274516U
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Abstract
The utility model discloses a stirrer shaft sealing device of an AFT tower, which is sleeved outside a stirrer shaft and comprises an inner cylinder and an outer cylinder, wherein the inner cylinder is connected to the lower end of a bearing chamber of the stirrer and is sealed, the outer cylinder is sleeved outside the stirrer shaft and is sealed, the inner cylinder is sleeved in the outer cylinder and forms a cavity, a gap is arranged between the inner cylinder and the outer cylinder, and a water seal is arranged in the gap to form a closed cavity; the closed cavity is provided with a pipeline and an air pressure gauge, so that the interior of the cavity is ensured to be in a positive pressure state. The utility model forms a cavity, fills process water to form water seal closure, and then fills compressed air above the water seal to form positive pressure, thereby preventing slurry from entering a sealing device and protecting a bearing; gaps are arranged among the inner cylinder, the outer cylinder and the stirrer shaft, and sealing is formed through water sealing, so that the normal work of the stirrer is not influenced, sealing can be formed, and the daily maintenance is convenient; the sealing device has the advantages of simple structure, convenience in installation and maintenance and good sealing effect.
Description
Technical Field
The utility model relates to a sealing device technical field, concretely relates to AFT tower agitator shaft seal device.
Background
The desulfurization AFT tower is under the positive pressure working condition under the normal working condition, and the bubbles in the desulfurization slurry are instantly released from the slurry after being acted by the circulating slurry pump, and the AFT tower and the absorption tower are arranged in the system structure, and the pressure of the system is connected with the top vent pipe through the collecting bowl return pipe, so that the positive pressure is formed inside the AFT tower. However, the designed use environment of the stirrer at the top of the AFT tower is normal temperature and normal pressure, the lower part of the stirrer bearing chamber is sealed by a framework oil seal, the phenomenon of smoke leakage exists at the stirrer bearing part after the stirrer is put into operation, and slurry is sprayed out from the upper cover part of the stirrer bearing chamber due to pressure when the stirrer is serious, so that the site pollution is caused, and the site environment is seriously influenced; and the splashing slurry in the event of slurry bubbling in the AFT tower exacerbates corrosion of the bearing housing assembly of the top-entry mixer. Under the working condition, the safe use of the bearing of the stirrer forms a great potential safety hazard, and the safe and reliable operation of the stirrer is influenced. Thereby affecting the reliable operation of the slurry circulating system of the AFT tower. The utility model provides a AFT tower agitator shaft seal device solves AFT tower agitator bearing box department seepage problem, makes the bearing room assembly not corroded, improves the agitator reliability.
SUMMERY OF THE UTILITY MODEL
The utility model provides a AFT tower agitator shaft sealing device forms the chamber and carries out inclosed through the water seal with the agitator shaft through the inside and outside section of thick bamboo, fills into compressed air and forms the malleation, avoids the thick liquid to get into sealing device, and then the protection bearing.
The utility model provides a technical scheme that above-mentioned technical problem adopted is:
a stirrer shaft sealing device of an AFT tower is sleeved outside a stirrer shaft, is positioned below a stirrer bearing chamber, and comprises an inner cylinder and an outer cylinder, wherein a cavity is formed among the inner cylinder, the outer cylinder, the stirrer shaft and the bearing chamber;
the inner cylinder comprises an inner connecting cylinder and an inner sealing cylinder which are coaxially arranged, and the top end of the inner connecting cylinder is connected to the lower end of the stirrer bearing chamber and is sealed; the outer cylinder comprises an outer connecting cylinder and an outer sealing cylinder, the outer connecting cylinder is sleeved on the outer side of the stirrer shaft and is sealed, and the outer sealing cylinder is sleeved on the outer side of the lower part of the inner sealing cylinder;
a gap is arranged between the inner wall of the inner sealing cylinder and the outer wall of the stirrer shaft, a gap is arranged between the inner wall of the outer cylinder and the outer wall of the inner sealing cylinder, and a gap is arranged between the bottom end of the inner sealing cylinder and the bottom surface of the inner cavity of the outer cylinder;
the stirrer bearing chamber is characterized in that a fastening bolt of the stirrer bearing chamber is provided with two through holes which are communicated up and down, and the hole bottoms of the two through holes are positioned at the inner side of the inner connecting cylinder; one through hole orifice is connected with a pipeline, the pipeline is respectively provided with process water and compressed air, and the other through hole orifice is provided with a barometer;
the lower part of the inner cavity of the inner sealing cylinder body is provided with process water, and the process water blocks a gap between the inner cylinder and the outer cylinder to form a closed space.
Furthermore, the outer cylinder is formed by splicing two half cylinders, corresponding splicing plates are arranged on the splicing surfaces of the half cylinders, and the splicing plates are positioned on the outer side of the outer cylinder.
Furthermore, a flanging is arranged at the top end of the outer barrel, a baffle is arranged on the outer side of the inner sealing barrel, and the baffle is located above the flanging of the outer barrel and forms a gap with the flanging of the outer barrel.
Further, the gap is 18 mm.
Furthermore, sealant is arranged at the joint of the inner barrel and the stirrer bearing chamber, the joint of the outer barrel and the stirrer shaft, and the joint of the baffle and the inner sealing barrel body for sealing.
Further, the pipeline comprises a water pipe and a gas pipe, the outer diameter of the water pipe is smaller than the inner diameter of the through hole, the lower portion of the water pipe penetrates through the through hole and is located in the cavity, the outer diameter of the gas pipe is larger than the inner diameter of the through hole, and the bottom end of the gas pipe is fixedly connected to the upper surface of the through hole and covers the orifice of the through hole.
Furthermore, the inner cylinder and the outer cylinder are made of stainless steel.
Furthermore, the splicing plates are connected through bolts.
The utility model discloses beneficial effect as follows:
the inner cylinder and the outer cylinder are connected with the stirrer shaft to form a cavity, process water is filled into the cavity to form water seal sealing, and then compressed air is filled above the water seal to form positive pressure, so that slurry is prevented from entering a sealing device, and a bearing is protected;
gaps are arranged among the inner cylinder, the outer cylinder and the stirrer shaft, and sealing is formed through water sealing, so that the normal work of the stirrer is not influenced, sealing can be formed, and the daily maintenance is convenient;
a water seal is adopted between the two cylinders which move relatively, so that the relative movement is ensured, and a good sealing effect is achieved;
setting a barometer to compare with the pressure of the upper space of the AFT tower, taking the barometer as a reference of water inflow and air pressure, and adjusting to ensure the sealing effect;
the utility model discloses simple structure, it is convenient that the installation is maintained, and is sealed effectual, effectively solves AFT tower agitator bearing box department seepage problem, has guaranteed the life of bearing room.
Drawings
FIG. 1 is a sectional view of the present invention in use;
FIG. 2 is a cross-sectional view of the overall structure of the present invention;
FIG. 3 is a schematic view of the pipeline arrangement of the present invention;
fig. 4 is a schematic view of the barometer of the present invention.
Reference numerals: 1-inner cylinder, 11-inner connecting cylinder, 12-inner sealing cylinder, 121-baffle, 2-outer cylinder, 21-outer connecting cylinder, 22-outer sealing cylinder, 23-splice plate, 3-through hole, 4-pipeline, 5-barometer, 6-process water and 7-compressed air.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
As shown in fig. 1 and 2, the agitator shaft sealing device of the AFT tower is sleeved outside an agitator shaft and positioned below an agitator bearing chamber, and comprises an inner cylinder 1 and an outer cylinder 2, wherein a chamber is formed among the inner cylinder 1, the outer cylinder 2, the agitator shaft and the bearing chamber;
the inner cylinder 1 comprises an inner connecting cylinder 11 and an inner sealing cylinder body 12 which are coaxially arranged, and the top end of the inner connecting cylinder 11 is connected to the lower end of the bearing chamber of the stirrer and is sealed; the outer cylinder 2 comprises an outer connecting cylinder 21 and an outer sealing cylinder 22, the outer connecting cylinder 21 is sleeved on the outer side of the stirrer shaft and sealed, and the outer sealing cylinder 22 is sleeved on the outer side of the lower part of the inner sealing cylinder body 12;
a gap is arranged between the inner wall of the inner sealing cylinder body 12 and the outer wall of the stirrer shaft, a gap is arranged between the inner wall of the outer cylinder 2 and the outer wall of the inner sealing cylinder body 12, and a gap is arranged between the bottom end of the inner sealing cylinder body 12 and the bottom surface of the inner cavity of the outer cylinder 2;
as shown in fig. 3 and 4, the fastening bolt of the stirrer bearing chamber is provided with two through holes 3 which are vertically through, and the hole bottoms of the two through holes 3 are positioned at the inner side of the inner connecting cylinder 11; one through hole 3 is connected with a pipeline 4, the pipeline 4 is respectively provided with process water 6 and compressed air 7, and the other through hole 3 is provided with a barometer 5;
the lower part of the inner cavity of the inner sealing cylinder body 12 is provided with process water 6, and the process water 6 blocks the gap between the inner cylinder 1 and the outer cylinder 2 to form a closed space.
Further, AFT tower top is equipped with pressure transmitter and is used for measuring the space pressure on AFT tower upper portion, the utility model discloses be equipped with barometer 5 and with pressure transmitter's pressure contrast, as the standard of the interior pressure value of cavity, in the actual operation, according to pressure transmitter's pressure value, keep the malleation in guaranteeing the cavity, avoid the thick liquid to get into in the cavity.
As shown in fig. 1, the principle of the present invention is as follows: the inner cylinder 1 and the outer cylinder 2 are fixed on the bearing chamber and the bearing respectively to form a chamber, the inner cylinder 1 is kept static, the outer cylinder 2 moves together with the bearing, a gap is arranged between the inner cylinder 1 and the outer cylinder 2 to ensure the relative movement between the inner cylinder and the outer cylinder, then a water seal is arranged below the chamber to seal the gap, compressed air is filled above the chamber to form positive pressure, and when slurry is sprayed out of the upper cover part of the bearing chamber, the slurry cannot enter the chamber due to the positive pressure in the chamber, so that the bearing is protected.
As shown in fig. 2, further, the outer cylinder 2 is formed by splicing two half cylinders, the splicing surfaces of the half cylinders are provided with corresponding splicing plates 23, and the splicing plates 23 are located outside the outer cylinder 2.
Furthermore, a flanging is arranged at the top end of the outer cylinder 2, a baffle 121 is arranged on the outer side of the inner sealing cylinder 12, and the baffle 121 is positioned above the flanging of the outer cylinder 2 and forms a gap with the flanging.
Preferably, the gap is 18 mm. The wall thickness of the inner cylinder 1 and the outer cylinder 2 is 4mm, the inner diameter of the inner connecting cylinder 11 is 450mm, the inner diameter of the inner sealing cylinder body 12 is 237mm, and the inner diameter of the outer sealing cylinder 22 is 259 mm.
Furthermore, the joints of the inner cylinder 1 and the bearing chamber of the stirrer, the joints of the outer cylinder 2 and the stirrer shaft, and the joints of the baffle plate 121 and the inner sealing cylinder 12 are all provided with sealing glue for sealing. And the sealant is arranged to ensure the sealing effect of the cavity.
As shown in fig. 3, preferably, the pipeline 4 includes a water pipe and an air pipe, the outer diameter of the water pipe is smaller than the inner diameter of the through hole 3, the lower part of the water pipe passes through the through hole 3 and is located in the chamber, the outer diameter of the air pipe is larger than the inner diameter of the through hole 3, the bottom end of the air pipe is fixedly connected to the upper surface of the through hole 3 and covers the opening of the through hole 3.
Furthermore, the inner cylinder 1 and the outer cylinder 2 are made of stainless steel. Preferably, the inner cylinder 1 and the outer cylinder 2 are screwed onto the bearing housing or the stirrer shaft.
Further, the splice plates 23 are connected by bolts.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (8)
1. A stirrer shaft sealing device of an AFT tower is sleeved outside a stirrer shaft and positioned below a stirrer bearing chamber and is characterized by comprising an inner cylinder (1) and an outer cylinder (2), wherein the inner cylinder (1) is fixed below the bearing chamber, the outer cylinder (2) is fixed on the stirrer shaft, and the lower end of the inner cylinder (1) is inserted into the cylinder of the outer cylinder (2) and forms a chamber together with the stirrer shaft and the bearing chamber;
the inner cylinder (1) comprises an inner connecting cylinder (11) and an inner sealing cylinder body (12) which are coaxially arranged, and the top end of the inner connecting cylinder (11) is connected to the lower end of the stirrer bearing chamber and is sealed; the outer cylinder (2) comprises an outer connecting cylinder (21) and an outer sealing cylinder (22), the outer connecting cylinder (21) is sleeved outside the stirrer shaft and is sealed, and the outer sealing cylinder (22) is sleeved outside the lower part of the inner sealing cylinder body (12);
a gap is arranged between the inner wall of the inner sealing cylinder body (12) and the outer wall of the stirrer shaft, a gap is arranged between the inner wall of the outer cylinder (2) and the outer wall of the inner sealing cylinder body (12), and a gap is arranged between the bottom end of the inner sealing cylinder body (12) and the bottom surface of the inner cavity of the outer cylinder (2);
the stirrer bearing chamber is characterized in that through holes (3) which are communicated up and down are formed in the fastening bolt of the stirrer bearing chamber, two through holes (3) are formed, and the hole bottoms of the two through holes are positioned on the inner side of the inner connecting cylinder (11); one orifice of the through hole (3) is connected with a pipeline (4), the pipeline (4) is respectively provided with process water (6) and compressed air (7), and the orifice of the other through hole (3) is provided with a barometer (5);
the lower part of the inner cavity of the inner sealing cylinder body (12) is provided with process water (6), and the process water (6) blocks the gap between the inner cylinder (1) and the outer cylinder (2) to form a closed space.
2. The AFT tower stirrer shaft seal arrangement of claim 1, wherein: the outer cylinder (2) is formed by splicing two half cylinders, corresponding splicing plates (23) are arranged on the splicing surfaces of the half cylinders, and the splicing plates (23) are located on the outer side of the outer cylinder (2).
3. The AFT tower stirrer shaft seal arrangement of claim 2, wherein: the top end of the outer barrel (2) is provided with a flanging, the outer side of the inner sealing barrel (12) is provided with a baffle (121), and the baffle (121) is positioned above the flanging of the outer barrel (2) and forms a gap with the flanging.
4. The AFT tower stirrer shaft seal arrangement of claim 3, wherein: the gap is 18 mm.
5. The AFT tower stirrer shaft seal arrangement of claim 3, wherein: and sealant is arranged at the joint of the inner barrel (1) and the bearing chamber of the stirrer, the joint of the outer barrel (2) and the stirrer shaft, and the joints of the baffle plate (121) and the inner sealing barrel body (12) for sealing.
6. The AFT tower stirrer shaft seal arrangement of claim 2, wherein: pipeline (4) include water pipe and trachea, the water pipe external diameter is less than through-hole (3) internal diameter, and its lower part passes through-hole (3) and is located the cavity, the trachea external diameter is greater than through-hole (3) internal diameter, and its bottom fixed connection is on through-hole (3) upper surface to cover through-hole (3) drill way.
7. The AFT tower stirrer shaft seal arrangement of claim 1, wherein: the inner cylinder (1) and the outer cylinder (2) are made of stainless steel.
8. The AFT tower stirrer shaft seal arrangement of claim 2, wherein: the splicing plates (23) are connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921945428.8U CN211274516U (en) | 2019-11-12 | 2019-11-12 | Shaft sealing device for AFT tower stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921945428.8U CN211274516U (en) | 2019-11-12 | 2019-11-12 | Shaft sealing device for AFT tower stirrer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211274516U true CN211274516U (en) | 2020-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921945428.8U Active CN211274516U (en) | 2019-11-12 | 2019-11-12 | Shaft sealing device for AFT tower stirrer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211274516U (en) |
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2019
- 2019-11-12 CN CN201921945428.8U patent/CN211274516U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |
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| CP03 | Change of name, title or address |