CN1826471A - Galvanic corrosion protection apparatus for a pump - Google Patents
Galvanic corrosion protection apparatus for a pump Download PDFInfo
- Publication number
- CN1826471A CN1826471A CNA2004800213106A CN200480021310A CN1826471A CN 1826471 A CN1826471 A CN 1826471A CN A2004800213106 A CNA2004800213106 A CN A2004800213106A CN 200480021310 A CN200480021310 A CN 200480021310A CN 1826471 A CN1826471 A CN 1826471A
- Authority
- CN
- China
- Prior art keywords
- pump
- sacrificial anode
- unit
- standing part
- corrosion protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/20—Conducting electric current to electrodes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
Abstract
A pump comprises pumping means (1) of a fluid and galvanic protection means (3, 4) arranged to protect against corrosion said pumping means (1), said galvanic protection means (3) comprising sacrificial anode means (4) arranged in direct contact with said pumping means(1) and electrically coupled with said pumping means (1); a galvanic protection apparatus for a pump (10) comprises sacrificial anode means (4) electrically associateable with pumping means (1) of said pump (10), said sacrificial anode means (4) comprising a portion (6) configured in such a way as to interact with a flow of fluid pumped by said pumping means (1).
Description
Technical field
The present invention relates to protect the protective equipment of the galvanic corrosion that causes by electricity.
This device is particularly suitable for the protection such as the submersible pump of down-hole with pump.
Background technique
Device according to the present invention is suitable for preventing that the Structural Hardware part of submersible pump from corroding, particularly in underground equipment, wherein have in this zone leakage current and/or since penetration of sea water make underground water be rich in salinity especially, this situation makes the metal parts utmost point need prevent galvanic corrosion.
This pump generally is to make with the metal or alloy of corrosion-vulnerable, and described corrosion has the metallic material, particularly pump of liquid and the metallic material in liquid contact region territory around being, if especially salt is dissolved in its specific conductance of raising in the described solution and dissolves.
The part quality of the corrosion-vulnerable of described pump descends and causes that local fault takes place at the corrosion-vulnerable position, and in fact this can make pump use.
What in general, the device of electric current process was corroded is the position that described electric current leaks.
In the protective system that contacts or be dipped in the pump-unit of working in the liquid with liquid is well-known, its objective is the corrosion phenomenon that reduces in the described pump-unit, thereby prolongs its operating life.
For example, protecting described pump-unit to make it uncorroded device is as you know, and this device is exactly so-called sacrificial anode.Described sacrificial anode is to make not as the metallic material of the material of manufacturing pump-unit with inertia, that is to say that the electrochemical potential of these metallic material is lower than the constouctional material of the pump-unit that will protect, thereby easier corrosion.
Sacrificial anode can oxidation and dissolving because electrochemical potential is low, the then not oxidation of shielded pump-unit, this just people stick at.
In other words, the leakage of the electric current of the pump-unit of flowing through concentrates on sacrificial anode, thereby has protected pump-unit, the unlikely corrosion.
The pump that use the down-hole comprises and the be used for drive electric motor of described pump shaft to installation.
In these pumps, the substrate that sacrificial anode is fixed in described motor because the space-constrained cause can not be placed on the side of pump or motor, that is, and motor from described pump part farthest.
A shortcoming of above-mentioned protective system is that electric current must pass to sacrificial anode by motor from pump, can run into powerful resistance.
This means the part electric current not arrive sacrificial anode and be consumed in pump, thereby described pump has no small corrosion.
Another shortcoming of above-mentioned protective system is that the guard time that is provided is limited.
In fact, the metallic material that constitutes sacrificial anode with liquid that sacrificial anode contact in oxygen react and form the oxide that one deck is protected internal layer on the surface of back at sacrificial anode.Thereby stop its further corrosion.
This phenomenon more can take place when less important leakage current is arranged.
Well-known passivation phenomenon will take place in this case.
Like this, because sacrificial anode is subjected to the protection of oxide skin(coating), current drain is in pump and/or the motor that links with it, thereby described pump and motor are corroded.
Above-mentioned sacrificial anode is furnished with fastener, and for example, the screw threads for fastening element is used for described sacrificial anode is connected in the driving pump motor.
The stronger precious metal manufacturing of metal that existing fastener is made sacrificial anode with the inertia ratio.
This can make corrosion phenomenon be positioned on the sacrificial anode, thereby prevents that corrosion from having influence on described fastener, therefore, prevents to corrode effective connection that has influence between sacrificial anode and the motor.
Because the cost of fastener on precious metal, the cost of existing sacrificial anode is quite high.
Summary of the invention
An object of the present invention is to improve existing anti-corrosion system.
A purpose provides the significant corrosion protection pump-unit of usefulness again.
Another purpose provides the corrosion protection pump-unit that can bring into play anti-corrosion function for a long time.
Also have a purpose to provide the moderate corrosion protection pump-unit of cost.
A first aspect of the present invention provides a kind of galvanic corrosion protection apparatus that is used for pump, described galvanic corrosion protection apparatus is included in the electric sacrificial anode device be connected with the pumping installations of described pump that goes up, and it is characterized in that described sacrificial anode device has an agency part to be constructed to be permeable to mobile phase mutual effect with the described liquid of described pumped.
Because this one side of the present invention, described liquid stream is removed the oxide skin(coating) that forms after the described anodic attack from the sacrificial anode surface.
This has just guaranteed that electric current can disperse at described sacrificial anode, and described sacrificial anode is brought into play desired protective action to pumping installations like this.
Consequently described galvanic corrosion protection apparatus can be brought into play usefulness in a very long time, that is, its usefulness can perform to described sacrificial anode always and dissolve fully.
In one embodiment, extend a standing part, be fastened onto between described pump and the electronic device, in operation, then link with described pump from described part.
So just needn't use the fastener of the precious metal manufacturing stronger than the material inertia of sacrificial anode device.
So just make the cost of described sacrificial anode device very limited.
A second aspect of the present invention provides a kind of pump-unit; comprise the pump of pumping liquid and the galvanic corrosion protection apparatus that the described pumping installations of protection is not corroded; described galvanic corrosion protection apparatus is included in the electric sacrificial anode device that links with described pump that goes up, and it is characterized in that described sacrificial anode device directly contacts with described pump.
Because this one side of the present invention can produce the pump that is equipped with effective anti-corrosion system.
In fact, because described sacrificial anode device disposes to such an extent that directly contact with pump, the resistance that the electric current in the described pump runs into when flowing to described sacrificial anode device is very low.
Therefore, the dispersion of electric current concentrates on described sacrificial anode device.
As a result, described pumping installations is effectively protected, and is not subjected to galvanic corrosion.
Description of drawings
The present invention may be better understood with reference to the accompanying drawings and implement the present invention, and that these illustrate is non-limiting embodiment, in the accompanying drawing:
Fig. 1 is the diagrammatic side view of pump in accordance with the present invention;
Fig. 2 is the thin portion sectional view of the amplification of Fig. 1 part.
Embodiment
Accompanying drawing shows that pump-unit 10 comprises the motor 2 of pump 1 and driven pump 1.
With the thread type fastener that does not illustrate pump 1 is fixed in motor 2.
Pump-unit 10 also has galvanic corrosion protection apparatus 3, and described device has sacrificial anode 4, the low metallic material manufacturing of electrochemical potential that described anode is made the metallic material of pump 1 and motor 2 with the electrochemical potential ratio.Because electrochemical potential is low, the electric current on pump 1 and the motor 2 passes to sacrificial anode 4, and electric current scatters and disappears by sacrificial anode 4.
Therefore, sacrificial anode 4 corrosion prevent that corrosion from having influence on pump 1 and motor 2, thereby prolong the operating life of pump-unit 10.
Sacrificial anode 4 is disposed between pump 1 and the motor 2, and the situation that takes place with existing pump-unit is different, and the resistance that the electric current arrival sacrificial anode 4 on the pump 1 runs into is very little.In existing pump-unit, in fact electric current must pass to sacrificial anode by motor from pump.
Sacrificial anode 4 comprise standing part 5 that sacrificial anode 4 is fixed in motor 2 with pump 1 in the agency part 6 that contacts along F direction liquid flow flowing.
Galvanic corrosion protection apparatus 3 is exposed to the liquid stream that enters pump 1, thereby these two faces of particularly mutually perpendicular substantially end face 7 and side 18--work in the galvanic corrosion protection process most.
Standing part 5 and agency part 6 all are annular, and the diameter of agency part 6 is less than the diameter of standing part 5.
As shown in Figure 2, pump 1 has supporting element 11, and window 19 is arranged on its sidewall, and described window makes in the liquid energy inflow pump 1.
One end 12 of described supporting element 11 has seat 13, described seat cooperates qualification to hold described standing part 5 with the basal wall 14 of motor 2 chamber 15.
In use, when using common fastener such as screw or stud that pump 1 is fixed in motor 2, described standing part 5 just is fixed between pump 1 and the motor 2.
This just makes described sacrificial anode 4 can be firmly attached to pump-unit 10.
Described standing part 5 is not exposed to liquid stream, does not therefore subject to corrosion.Thereby standing part 5 can be used the same metallic material manufacturing of making sacrificial anode 4.
Like this, just no longer need to guarantee the connecting element of relative position between sacrificial anode 4 and pump 1, the motor 2, for example, screw thread connecting component.
Pump-unit 10 is also just cheap especially like this.
This corrosion phenomenon of pump-unit 10 concentrates on the agency part 6 of sacrificial anode 4, trends towards covering one deck oxide thereon.
Because liquid stream is to the abrasive acrion of agency part 6, the oxide that forms after the end face 7 of agency part 6 and side 18 oxidations is constantly removed by liquid stream.
So just avoided oxide accumulation on the end face 7 of agency part 6 and side 18, in fact the protection effect of sacrificial anode 4 can remain unchanged because electric current lost remains in sacrificial anode 4 these regional areas.
Therefore, the protective action of galvanic corrosion protection apparatus 3 can keep for a long time, can last till that sacrificial anode 4 is dissolved fully because prevent pump 1 and motor 2 corrosion.
Claims (15)
1. pump-unit, it comprises pump (1) and prevents the galvanic corrosion protection apparatus (3,4) that described pump (1) is corroded, described galvanic corrosion protection apparatus (3) is included in the electric sacrificial anode device (4) that is connected with described pump (1) that goes up, and it is characterized in that arranging described sacrificial anode device (4) directly to contact with described pump (1).
2. according to the pump-unit of claim 1, it is characterized in that described sacrificial anode device (4) has an agency part (6) to be configured to interact with the described flow of liquid of described pump-unit (1) pumping.
3. according to the pump-unit of claim 2, it is characterized in that described agency part (6) has two mutually perpendicular surfaces (7,18) to be exposed to described flow of liquid.
4. according to the pump-unit of above each claim, it is characterized in that it also comprises the electronic device (2) that drives described pumping installations (1).
5. according to the pump-unit of claim 4, it is characterized in that arranging described sacrificial anode device (4) directly to contact with described electronic device (2).
6. according to each pump-unit among the claim 1-5, it is characterized in that described sacrificial anode device (4) has another standing part (5), can make described sacrificial anode device (4) be fixed in described pumping installations (1).
7. according to the pump-unit of claim 6, when it is characterized in that the claim 5 of accessory claim 2,3,4 or accessory claim 2 or 3, the horizontal attached primary school of described agency part (6) is in the transverse dimension of described standing part (5).
8. according to the pump-unit of claim 6 or 7, it is characterized in that described pumping installations (1) has the base device (13) that holds described standing part (5).
9. pump-unit according to Claim 8 is characterized in that described base device (13) is constructed to be permeable to make described standing part (5) not contact with described liquid stream.
10. according to the pump-unit of above each claim, it is characterized in that it also comprises supporting element (11), opening (19) is arranged on the sidewall of described element, and described opening makes described liquid stream flow to described pump (1) along advancing with respect to the radial direction of described pump (1) substantially.
11. galvanic corrosion protection apparatus that is used for pump-unit (10), it is characterized in that being included in the electric sacrificial anode device (4) that is connected with the pump (1) of described pump-unit (10) that goes up, it is characterized in that described sacrificial anode device (4) has an agency part (6) to be configured to interact with the liquid stream of described pump (1) pumping.
12., it is characterized in that described agency part (6) has two mutually perpendicular substantially surfaces (7,18) to be exposed to described liquid stream according to the device of claim 11.
13., it is characterized in that described sacrificial anode device (4) has the standing part (5) between the electronic device (2) that is fastened onto described pump (1) and drives described pump (1) according to the device of claim 11 or 12.
14. according to the device of claim 13, it is characterized in that described standing part (5) is contained in the chamber (15), described chamber is limited by described pump (1) and described electronic device (2), basic and described liquid stream is isolated.
15., it is characterized in that the transverse dimension of the transverse dimension of described agency part (6) less than described standing part (5) according to the device of claim 13 or 14.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMO2003A000224 | 2003-07-31 | ||
| IT000224A ITMO20030224A1 (en) | 2003-07-31 | 2003-07-31 | CORALSION GALVANIC PROTECTION SYSTEM. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1826471A true CN1826471A (en) | 2006-08-30 |
| CN100462563C CN100462563C (en) | 2009-02-18 |
Family
ID=30012824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800213106A Expired - Fee Related CN100462563C (en) | 2003-07-31 | 2004-07-29 | Galvanic corrosion protection apparatus for a pump |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1660776B1 (en) |
| CN (1) | CN100462563C (en) |
| AT (1) | ATE364138T1 (en) |
| DE (1) | DE602004006879D1 (en) |
| DK (1) | DK1660776T3 (en) |
| ES (1) | ES2287759T3 (en) |
| IT (1) | ITMO20030224A1 (en) |
| WO (1) | WO2005015024A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716784A (en) * | 2013-12-13 | 2015-06-17 | Em－动力有限责任公司 | Electrical machine unit with corrosion protection by sacrificial anode |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4567081B2 (en) * | 2008-09-29 | 2010-10-20 | 株式会社豊田中央研究所 | Fluid pump |
| UA109682C2 (en) | 2010-12-09 | 2015-09-25 | PUMP PUMP PLACED PIPE | |
| USD687125S1 (en) | 2011-08-19 | 2013-07-30 | S.P.M. Flow Control, Inc. | Fluid end |
| CN106150953B (en) | 2012-02-01 | 2018-10-19 | S.P.M.流量控制股份有限公司 | Pump fluid end with integrated web part |
| USD679292S1 (en) | 2012-04-27 | 2013-04-02 | S.P.M. Flow Control, Inc. | Center portion of fluid cylinder for pump |
| DE102015119095B4 (en) | 2015-11-06 | 2019-03-21 | Pierburg Gmbh | Coolant pump for an internal combustion engine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211625A (en) * | 1978-09-11 | 1980-07-08 | Borg-Warner Corporation | Impressed current cathodic protection system for submersible downhole pumping assembly |
| US5183100A (en) * | 1991-02-14 | 1993-02-02 | Harrell Jr James E | System for efficiently exchanging heat or cooling ground water in a deep well |
| JP3335884B2 (en) * | 1997-07-16 | 2002-10-21 | 株式会社荏原製作所 | Corrosion / corrosion analysis method |
| NO307096B1 (en) * | 1997-11-17 | 2000-02-07 | Aker Offshore Partner As | Corrosion-protected metal construction, for example in the form of a pipeline which may be part of a stronger pipe system |
| JP2000111510A (en) * | 1998-09-30 | 2000-04-21 | Ebara Corp | Analytical method for corrosion and corrosion prevention |
-
2003
- 2003-07-31 IT IT000224A patent/ITMO20030224A1/en unknown
-
2004
- 2004-07-29 WO PCT/EP2004/008543 patent/WO2005015024A1/en active IP Right Grant
- 2004-07-29 DE DE602004006879T patent/DE602004006879D1/en active Active
- 2004-07-29 EP EP04763633A patent/EP1660776B1/en active Active
- 2004-07-29 DK DK04763633T patent/DK1660776T3/en active
- 2004-07-29 ES ES04763633T patent/ES2287759T3/en active Active
- 2004-07-29 CN CNB2004800213106A patent/CN100462563C/en not_active Expired - Fee Related
- 2004-07-29 AT AT04763633T patent/ATE364138T1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716784A (en) * | 2013-12-13 | 2015-06-17 | Em－动力有限责任公司 | Electrical machine unit with corrosion protection by sacrificial anode |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1660776A1 (en) | 2006-05-31 |
| DK1660776T3 (en) | 2007-10-08 |
| DE602004006879D1 (en) | 2007-07-19 |
| WO2005015024A1 (en) | 2005-02-17 |
| ATE364138T1 (en) | 2007-06-15 |
| CN100462563C (en) | 2009-02-18 |
| ITMO20030224A0 (en) | 2003-07-31 |
| ITMO20030224A1 (en) | 2005-02-01 |
| EP1660776B1 (en) | 2007-06-06 |
| ES2287759T3 (en) | 2007-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20200729 |