CN216077689U - Seawater circulating pump corrosion prevention device - Google Patents
Seawater circulating pump corrosion prevention device Download PDFInfo
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- CN216077689U CN216077689U CN202120923713.0U CN202120923713U CN216077689U CN 216077689 U CN216077689 U CN 216077689U CN 202120923713 U CN202120923713 U CN 202120923713U CN 216077689 U CN216077689 U CN 216077689U
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- impeller
- prevention device
- corrosion prevention
- sacrificial anode
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Abstract
The utility model belongs to the technical field of mechanical design, and particularly relates to an anti-corrosion device for a seawater circulating pump. The utility model comprises an impeller, a sacrificial anode ring, a stud A, a nut A, a protective hood and a pump shaft; the upper surface of the impeller is provided with a circular step, the annular sacrificial anode is sleeved on the step, the pump shaft is connected with the impeller through a stud bolt A and a nut A, and the protective hood is arranged at the top of the stud bolt A. The utility model has simple structure and convenient installation, effectively solves the corrosion problem of the pump shaft and the impeller of the seawater circulating pump by adopting the measure of additionally installing the sacrificial anode ring, coats the corrosion-resistant grease on the exposed part of the fastening bolt, additionally installs the protective hood cap and seals the protective hood to cut off the contact between the bolt and the seawater, and effectively solves the problems of difficult corrosion and disassembly of the fastening bolt of the impeller and the like.
Description
Technical Field
The utility model belongs to the technical field of mechanical design, and particularly relates to an anti-corrosion device for a seawater circulating pump.
Background
2 units of a first stage project of a certain nuclear power station are provided with 8 circulating seawater pumps which are used for supplying circulating cooling water to a turbine condenser and discharging circulating water from the condenser to the sea. The pump is a vertical axial flow pump, the medium is seawater, and the pump shaft is connected with the impeller by 10M 56 bolts. When the pump is periodically disassembled and overhauled, the corrosion phenomena of parts such as a pump impeller, a pump shaft and the like in different degrees are found, so that the running reliability of the pump is reduced, the pump is important equipment of a nuclear power station, and the safe and stable running of a unit can be influenced due to the reduced reliability. The exposed part of the fastening bolt of the impeller is corroded by seawater, silt enters into a thread gap between the bolt and the nut, the mounting space of the bolt is narrow, and the nut is difficult to dismount.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an anti-corrosion device for a seawater circulating pump, which is simple in structure and convenient to install, effectively solves the corrosion problem of a pump shaft and an impeller of the seawater circulating pump by adopting a measure of additionally installing a sacrificial anode ring, coats anti-corrosion grease on the exposed part of a fastening bolt, additionally installs a protective hood and seals the fastening bolt, cuts off the contact between the bolt and seawater, and effectively solves the problems of corrosion, difficulty in dismounting and the like of the fastening bolt of the impeller.
The technical scheme adopted by the utility model is as follows:
an anticorrosion device for a seawater circulating pump comprises an impeller, a sacrificial anode ring, a stud bolt A, a nut A, a protective hood and a pump shaft; the upper surface of the impeller is provided with a circular step, the annular sacrificial anode is sleeved on the step, the pump shaft is connected with the impeller through a stud bolt A and a nut A, and the protective hood is arranged at the top of the stud bolt A.
A plurality of through holes are uniformly formed in the sacrificial anode, and holes are formed in the impeller corresponding to the through holes for tapping.
The top of the through hole of the annular sacrificial anode is provided with a counter bore.
One end of the stud B penetrates through the through hole to be connected with the impeller in a matched mode, and the other end of the stud B is connected with the fastening nut B.
And the fastening nut B is positioned in the counter bore and connects the sacrificial anode ring with the impeller through the stud bolt B and the fastening nut B.
And anticorrosive paint is coated on the lower end surface of the sacrificial anode ring in contact with the impeller.
And ceramic paint is injected into the countersunk hole of the sacrificial anode ring.
And anticorrosive grease is smeared on the exposed part of the upper end of the screw of the stud A.
A sealing ring is arranged between the protective hood and the nut A, and vaseline is uniformly coated outside the sealing ring; and then installed into the seal groove of the protective cap.
The protective cover cap upper portion is equipped with the hexagon, conveniently dismantles with the spanner, revolves protective cover cap to stud A on and screws up, makes sealing washer and nut A upper surface closely laminate, plays the purpose that prevents the sea water entering protective cover cap.
And spot welding spots are performed at the joint position of the protective hood cap and the nut A, so that the protective hood cap is prevented from loosening.
Compared with the prior art, the utility model has the beneficial effects that:
1) the seawater circulating pump anticorrosion device is simple in structure and convenient to install;
2) in the seawater circulating pump corrosion prevention device, the sacrificial anode can effectively reduce corrosion risk of parts of the seawater pump, and the service life is safely prolonged;
3) the ceramic coating in the seawater circulating pump anticorrosion device effectively prevents seawater from corroding the fixing bolt of the sacrificial anode, prevents the nut from loosening, and ensures the reliable connection of the sacrificial anode and the impeller;
4) the protective hood cap, the sealing ring and the anti-corrosive grease in the anti-corrosive device for the seawater circulating pump effectively protect the impeller fastening bolt, and the problems of corrosion and difficulty in disassembly are solved;
5) the seawater circulating pump corrosion prevention device effectively reduces the risk of damage to components such as a pump shaft and an impeller, and improves the operation reliability of the seawater circulating pump.
Drawings
FIG. 1 is a schematic cross-sectional view of an anti-corrosion device for a seawater circulation pump according to the present invention;
FIG. 2 is a top view of a sacrificial anode ring in an anti-corrosion apparatus for a seawater circulation pump according to the present invention;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic cross-sectional view of a protective cap of an anti-corrosion apparatus for a seawater circulation pump according to the present invention;
in the figure: 1. an impeller; 2. a sacrificial anode ring; 3. a stud bolt B; 4. a nut B; 5. a ceramic coating; 6. a stud bolt A; 7. a nut A; 8. spot welding; 9. a seal ring; 10. anticorrosive grease; 11. a protective hood; 12. and a pump shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the seawater circulating pump corrosion prevention device provided by the utility model comprises an impeller 1; the pump comprises a sacrificial anode ring 2, a stud bolt B3, a nut B4, ceramic paint 5, a stud bolt A6, a nut A7, spot welding 8, a sealing ring 9, anticorrosion grease 10, a protective hood 11 and a pump shaft 12.
The upper surface of the impeller 1 is provided with a circular step, as shown in fig. 2 and 3, the annular sacrificial anode 2 is sleeved on the step, a plurality of through holes are uniformly formed in the sacrificial anode 2, countersunk holes are formed in the tops of the through holes, tapping is performed on the impeller 1 at positions corresponding to the through holes, and threaded holes of the stud bolts B3 are processed;
the lower end face of the sacrificial anode ring 2 is coated with anticorrosive paint, one end of a stud B3 penetrates through a through hole to be connected with the impeller 1 in a matched mode, the other end of a stud B3 is connected with a fastening nut B4, the fastening nut B4 is located in a counter bore, and the sacrificial anode ring 2 is connected with the impeller 1 through the stud B3 and a fastening nut B4;
injecting ceramic paint 5 into the countersunk hole of the sacrificial anode ring 2, and standing until the paint is cured;
cleaning a pump shaft 12, an impeller 1, a stud A6 and a nut A7 of the seawater circulating pump;
the pump shaft 12 and the impeller 1 are connected through a stud A6, and a nut A7 is correspondingly screwed onto the stud A6 and symmetrically fastened according to the required torque;
coating anticorrosive grease 10 on the exposed part of the upper end of the screw of the stud A6, installing a protective cover cap 11 on the top of the stud A6, arranging a sealing ring 9 between the protective cover cap 11 and a nut A7, and uniformly coating vaseline on the outer part of the sealing ring 9; then it is installed into the sealing groove of the protective hood 11;
the upper portion of the protective hood cap 11 is provided with a hexagon, so that the protective hood cap 11 can be conveniently detached by a wrench, the protective hood cap 11 is screwed to the stud bolt A6 and screwed down, the upper surface of the sealing ring 9 and the upper surface of the nut A7 are tightly attached, and the purpose of preventing seawater from entering the protective hood cap 11 is achieved.
Spot welding 8 is performed at the joint between the protective hood 11 and the nut a7 to prevent the protective hood 11 from loosening.
The working principle of the seawater circulating pump corrosion prevention device of the present invention is described below with reference to fig. 1: the sealing ring 8 in the device can effectively prevent seawater from entering the protective hood 10, and the seawater is prevented from scouring the anti-corrosion grease 9 to cause the corrosion of the stud bolt A and the nut A, so that the stud bolt A and the nut A are difficult to disassemble. By adopting a sacrificial anode protection method, the sacrificial anode ring 2 is arranged on the back of the impeller 1, the impeller 1 of the seawater circulating pump and the pump shaft 11 are prevented from being corroded by consuming the arranged sacrificial anode ring 2, the ceramic coating 5 in the countersunk hole of the sacrificial anode ring 2 can effectively prevent seawater from corroding the fixing bolt B3 of the sacrificial anode ring 2, the nut B4 is prevented from being loosened, and the reliable connection of the sacrificial anode ring 2 and the impeller 1 is ensured.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (11)
1. The utility model provides a sea water circulating pump corrosion prevention device which characterized in that: comprises an impeller (1), a sacrificial anode (2), a stud bolt A (6), a nut A (7), a protective cover cap (11) and a pump shaft (12); the upper surface of the impeller (1) is provided with a circular step, the annular sacrificial anode (2) is sleeved on the step, the pump shaft (12) and the impeller (1) are connected through a stud bolt A (6) and a nut A (7), and the protective cover cap (11) is installed at the top of the stud bolt A (6).
2. The seawater circulation pump corrosion prevention device of claim 1, wherein: a plurality of through holes are uniformly formed in the sacrificial anode (2), and holes are formed in the impeller (1) corresponding to the through holes for tapping.
3. The seawater circulation pump corrosion prevention device of claim 2, wherein: the top of the through hole of the annular sacrificial anode (2) is provided with a counter bore.
4. The seawater circulation pump corrosion prevention device of claim 3, wherein: still include stud B (3), the one end of stud B (3) is passed the through-hole and is connected with impeller (1) cooperation, and the other end and the fastening nut B (4) of stud B (3) are connected.
5. The seawater circulation pump corrosion prevention device of claim 4, wherein: and the fastening nut B (4) is positioned in the counter bore, and the sacrificial anode (2) is connected with the impeller (1) through the stud bolt B (3) and the fastening nut B (4).
6. The seawater circulation pump corrosion prevention device of claim 5, wherein: and anticorrosive paint is coated on the lower end surface of the sacrificial anode (2) in contact with the impeller (1).
7. The seawater circulation pump corrosion prevention device of claim 6, wherein: and ceramic paint (5) is injected into the countersunk holes of the sacrificial anode (2).
8. The seawater circulation pump corrosion prevention device of claim 7, wherein: and the exposed part of the upper end of the screw rod of the stud bolt A (6) is coated with anticorrosive grease (10).
9. The seawater circulation pump corrosion prevention device of claim 8, wherein: a sealing ring (9) is arranged between the protective hood (11) and the nut A (7), and vaseline is uniformly coated outside the sealing ring (9); then it is mounted into the sealing groove of the protective cap (11).
10. The seawater circulation pump corrosion prevention device of claim 9, wherein: the upper portion of the protective hood cap (11) is provided with a hexagon, so that the protective hood cap can be conveniently detached by a wrench, the protective hood cap (11) is screwed onto the stud bolt A (6) and screwed down, the upper surfaces of the sealing ring (9) and the nut A (7) are tightly attached, and the purpose of preventing seawater from entering the protective hood cap (11) is achieved.
11. The seawater circulation pump corrosion prevention device of claim 10, wherein: spot welding spots (8) are formed at the joint of the protective hood cap (11) and the nut A (7), so that the protective hood cap (11) is prevented from loosening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120923713.0U CN216077689U (en) | 2021-04-30 | 2021-04-30 | Seawater circulating pump corrosion prevention device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120923713.0U CN216077689U (en) | 2021-04-30 | 2021-04-30 | Seawater circulating pump corrosion prevention device |
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| CN216077689U true CN216077689U (en) | 2022-03-18 |
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| CN202120923713.0U Active CN216077689U (en) | 2021-04-30 | 2021-04-30 | Seawater circulating pump corrosion prevention device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115161645A (en) * | 2022-06-16 | 2022-10-11 | 华能(大连)热电有限责任公司 | Cathode protection device of centrifugal seawater booster pump |
-
2021
- 2021-04-30 CN CN202120923713.0U patent/CN216077689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115161645A (en) * | 2022-06-16 | 2022-10-11 | 华能(大连)热电有限责任公司 | Cathode protection device of centrifugal seawater booster pump |
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