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DE1253994B - Anode arrangement for cathodic corrosion protection of centrifugal pumps - Google Patents

Anode arrangement for cathodic corrosion protection of centrifugal pumps

Info

Publication number
DE1253994B
DE1253994B DE1962K0045668 DEK0045668A DE1253994B DE 1253994 B DE1253994 B DE 1253994B DE 1962K0045668 DE1962K0045668 DE 1962K0045668 DE K0045668 A DEK0045668 A DE K0045668A DE 1253994 B DE1253994 B DE 1253994B
Authority
DE
Germany
Prior art keywords
anodes
anode
pump
anode arrangement
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.)
Pending
Application number
DE1962K0045668
Other languages
German (de)
Inventor
Dipl-Ing Walther Buschhorn
Walter Deuchler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Klein Schanzlin and Becker AG
Original Assignee
Klein Schanzlin and Becker AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Klein Schanzlin and Becker AG filed Critical Klein Schanzlin and Becker AG
Priority to DE1962K0045668 priority Critical patent/DE1253994B/en
Publication of DE1253994B publication Critical patent/DE1253994B/en
Pending legal-status Critical Current

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Anodenanordnung zum kathodischen Korrosionsschutz von Kreiselpumpen Die Erfindung betrifft eine Anodenanordnung zum kathodischen Korrosionsschutz von Kreiselpumpen unter Verwendung fremdstromgespeister Anoden.Anode arrangement for cathodic corrosion protection of centrifugal pumps The invention relates to an anode arrangement for cathodic corrosion protection of Centrifugal pumps using externally powered anodes.

Die Anwendung des kathodischen Korrosionsschutzes ist bei Rohrleitungen und auch als Innenschutz von Apparaten, z. B. Kühlern, Kondensatoren, Wasserkesseln, Heißwasserbereitern u. dgl., bekannt. Es handelt sich hierbei um unbewegliche Bauteile und nicht um Maschinen mit beweglichen Bauteilen. Gegenstand eines älteren Patentes ist auch schon ein Verfahren und eine Vorrichtung zum Korrosionsschutz von Metallteilen, die mit durch Partikelchen verunreinigten, eine elektrochemische Korrosion verursachenden Flüssigkeiten in strömende Berührung kommen, wobei eine Entladung der Partikelchen in einer von der zu schützenden Stelle entfernten Zone, z. B. vor Eintritt der Flüssigkeit in die Maschine, erfolgt.The use of cathodic corrosion protection is for pipelines and also as internal protection of equipment, e.g. B. coolers, condensers, water boilers, Water heaters and the like are known. These are immovable components and not about machines with moving parts. Subject of an older patent is already a method and a device for the corrosion protection of metal parts, those contaminated with particles causing electrochemical corrosion Liquids come into flowing contact, causing a discharge of the particles in a zone remote from the place to be protected, e.g. B. before entry of the liquid into the machine.

Auf dem Gebiet der Kreiselpumpen ist ein Vorschlag zum kathodischen Korrosionsschutz bekannt, bei dem in der Saugleitung eine Anode in einem der Pumpe vorgeschalteten Rohrstück vorgesehen ist. Die Kreiselpumpe konnte damit indessen nicht wirksam geschützt werden.In the field of centrifugal pumps, one proposal is for cathodic Corrosion protection is known in which there is an anode in one of the pumps in the suction line upstream pipe section is provided. The centrifugal pump could meanwhile cannot be effectively protected.

Aufgabe der Erfindung ist, die Innenflächen von Kreiselpumpen gegen Korrosion zu schützen, die infolge der erhöhten Strömungsgeschwindigkeiten im Innern der Pumpe besonders betroffen sind. Eine besondere Schwierigkeit besteht hierbei darin, daß diese hohe Strömungsgeschwindigkeit die abtragende Wirkung der Korrosion stark unterstützt, was besonders für diejenigen Stellen in der Pumpe zutrifft, an denen sich schwer erfaßbare Wirbel der zu fördernden Flüssigkeit bilden.The object of the invention is to counter the inner surfaces of centrifugal pumps Protect against corrosion as a result of the increased flow rates inside the pump are particularly affected. There is a particular difficulty here in that this high flow rate reduces the erosive effect of corrosion strongly supported, which is especially true for those places in the pump which are difficult to detect eddies of the liquid to be conveyed.

Diese Aufgabe wird unter Verwendung fremdstromgespeister Anoden erfindungsgemäß dadurch gelöst, daß die Anoden an einer oder an beiden Stirnseiten des Pumpengehäuses im Bereich des Laufrades zur Erzielung einer möglichst gleichmäßigen Stromverteilung über die Innenflächen der Pumpe angeordnet sind. Als zusätzliche Maßnahme kann es dabei vorteilhaft sein, zumindest eine weitere Anode im Saugstutzen der Pumpe anzuordnen.According to the invention, this object is achieved using anodes supplied with external current solved in that the anodes on one or both end faces of the pump housing in the area of the impeller to achieve the most even power distribution possible are arranged over the inner surfaces of the pump. As an additional measure it can be advantageous to arrange at least one further anode in the suction port of the pump.

Durch die erfindungsgemäße Anodenanordnung ist es bei Kreiselpumpen erstmals gelungen, einen wirksamen Schutz der flüssigkeitsberührten Innenflächen gegen korrosive Angriffe zu erzielen. Durch die Anordnung der Anoden in unmittelbarer Nähe der rotierenden Teile kann die erforderliche Stromdichte optimal festgelegt werden, und es wird auch eine gleichmäßige Stromverteilung über die gesamte dem Fördermedium ausgesetzte Oberfläche erzielt. Weitere Einzelheiten der Erfindung sind der nachfolgenden Beschreibung zu entnehmen, in der das in der Zeichnung dargestellte Ausführungsbeispiel erläutert ist.The anode arrangement according to the invention makes it the case with centrifugal pumps Successful for the first time effective protection of the inner surfaces in contact with the liquid against corrosive attacks. By arranging the anodes in the immediate The required current density can be optimally determined in the vicinity of the rotating parts and there will also be an even distribution of current over the entire dem Achieved surface exposed to the pumped medium. Further details of the invention can be found in the following description, in which the shown in the drawing Embodiment is explained.

Das mit 1 bezeichnete Pumpengehäuse besitzt zu beiden Seiten auswechselbare Schleißplatten 2 und 3. Durch diese Schleißplatten sind im Bereich des Laufrades 4 eine Anzahl Anoden 5 und 6 durchgeführt. Die Anoden werden von Isolierhülsen 7 und 8 in radialer Richtung umgeben. Dadurch liegen die Anodenköpfe 9 und 10 geschützt vor der rotierenden Förderflüssigkeit. Der flüssigkeitsdichte Abschluß nach außen erfolgt bei der Anode 6 durch einen Gießharzausguß 11, bei der Anode 5 durch Kunstharzkitt 12. Die Zuführungskabel 13 und 14 sind durch flüssigkeitsdichte Stopfbüchsen 15 und 16 geführt. Im Saugstutzen 17 ist eine weitere Anode 18 befestigt, deren Anschlußbereich 19 mit einem Gießharzausguß 20 umgeben ist.The pump housing denoted by 1 has exchangeable wear plates 2 and 3 on both sides. A number of anodes 5 and 6 are passed through these wear plates in the area of the impeller 4. The anodes are surrounded by insulating sleeves 7 and 8 in the radial direction. As a result, the anode heads 9 and 10 are protected from the rotating conveying liquid. The anode 6 is sealed off from the outside by a cast resin nozzle 11, and on the anode 5 by synthetic resin putty 12. Another anode 18, the connection area 19 of which is surrounded by a cast resin nozzle 20, is fastened in the suction connection 17.

Das Pumpengehäuse 1, welches mit dem Saugstutzen 17 und den Schleißplatten 2 und 3 elektrisch leitend verbunden ist, ist über eine Polklemmenschraube 21 als Kathode an die die Anoden 5, 6 und 18 speisende Stromquelle angeschlossen.The pump housing 1, which is electrically conductively connected to the suction nozzle 17 and the wear plates 2 and 3, is connected via a pole terminal screw 21 as a cathode to the power source feeding the anodes 5, 6 and 18.

Claims (1)

Patentansprüche: 1. Anodenanordnung zum kathodischen Korrosionsschutz von Kreiselpumpen unter Verwendung fremdstromgespeister Anoden, d a d u r c h g e -kennzeichnet, daß die Anoden (5, 6) an einer oder an beiden Stirnseiten des Pumpengehäuses im Bereich des Laufrades zur Erzielung einer möglichst gleichmäßigen Stromverteilung über die Innenflächen der Pumpe angeordnet sind. 2. .Anodenanordnung nach Anspruch 1. dadurch gekennzeichnet, daß zumindest eine weitere Anode (18) im Saugstutzen (17) der Pumpe angeordnet ist. 3. Anodenanordnung nach einem der Ansprüche 1 und 2. dadurch gekennzeichnet, daß die Anoden @-on in radialer Richtung die Flüssigkeitsströmung abhaltenden Isolierhülsen (7. 8) umgeben sind. .1. Anodenanordnung nach Anspruch 1. dadurch gekennzeichnet, daß die Anoden (5. 6) in den Schleißwänden (2, 3) der Pumpe befestigt und deren Zuführungskabel (13, 14) jeweils mittels getrennter Stopfbüchsen (15, 16) in der Außenwand des Pumpengehäuses (1) abgedichtet sind. 5. Anodenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Kabeleinführungen der Anoden (5, 6) durch Ausguß der nach außen gerichteten Hohlräume der Schleißwände (2, 3) mit Gießharz (11) abgedichtet sind. In Betracht gezogene Druckschriften: Französische Patentschrift Nr. 1 112 228; britische Patentschrift Nr. 503 946; »Werkstoffe und Korrosion«, 1955, S. 196.Claims: 1. Anode arrangement for cathodic corrosion protection of centrifugal pumps using externally powered anodes, d u r c h g e - indicates that the anodes (5, 6) on one or both end faces of the pump housing in the area of the impeller to achieve the most even power distribution possible are arranged over the inner surfaces of the pump. 2.. Anode arrangement according to claim 1, characterized in that at least one further anode (18) in the Suction nozzle (17) of the pump is arranged. 3. Anode arrangement according to one of the claims 1 and 2. characterized in that the anodes @ -on the liquid flow in the radial direction retaining insulating sleeves (7. 8) are surrounded. .1. Anode assembly according to claim 1. characterized in that the anodes (5. 6) in the wear walls (2, 3) of the Pump attached and its supply cables (13, 14) each by means of separate stuffing boxes (15, 16) are sealed in the outer wall of the pump housing (1). 5. Anode assembly according to claim 1, characterized in that the cable entries of the anodes (5, 6) by pouring the outwardly directed cavities of the wear walls (2, 3) with Cast resin (11) are sealed. Publications considered: French U.S. Patent No. 1,112,228; British Patent No. 503,946; »Materials and Corrosion ”, 1955, p. 196.
DE1962K0045668 1962-01-17 1962-01-17 Anode arrangement for cathodic corrosion protection of centrifugal pumps Pending DE1253994B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1962K0045668 DE1253994B (en) 1962-01-17 1962-01-17 Anode arrangement for cathodic corrosion protection of centrifugal pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1962K0045668 DE1253994B (en) 1962-01-17 1962-01-17 Anode arrangement for cathodic corrosion protection of centrifugal pumps

Publications (1)

Publication Number Publication Date
DE1253994B true DE1253994B (en) 1967-11-09

Family

ID=7223930

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1962K0045668 Pending DE1253994B (en) 1962-01-17 1962-01-17 Anode arrangement for cathodic corrosion protection of centrifugal pumps

Country Status (1)

Country Link
DE (1) DE1253994B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142219A1 (en) * 1983-09-16 1985-05-22 Pulp and Paper Research Institute of Canada Electrochemical pump protection
WO2012146485A1 (en) * 2011-04-29 2012-11-01 Schaeffler Technologies AG & Co. KG Bearing comprising a corrosion-resistant bearing part
WO2014206839A1 (en) * 2013-06-28 2014-12-31 Ksb Aktiengesellschaft Fluid-conducting system with cathodic corrosion protection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503946A (en) * 1936-07-10 1939-04-11 Joseph Lepage Improvements in or relating to methods of protecting the screws, condensers or otherparts of ships or other marine craft against corrosion
FR1112228A (en) * 1954-10-05 1956-03-09 Condensation Application Mec Process and devices for protecting metals in contact with an electrolyte, against corrosion, scaling and the formation of deposits of various substances liable to promote corrosion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503946A (en) * 1936-07-10 1939-04-11 Joseph Lepage Improvements in or relating to methods of protecting the screws, condensers or otherparts of ships or other marine craft against corrosion
FR1112228A (en) * 1954-10-05 1956-03-09 Condensation Application Mec Process and devices for protecting metals in contact with an electrolyte, against corrosion, scaling and the formation of deposits of various substances liable to promote corrosion

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142219A1 (en) * 1983-09-16 1985-05-22 Pulp and Paper Research Institute of Canada Electrochemical pump protection
WO2012146485A1 (en) * 2011-04-29 2012-11-01 Schaeffler Technologies AG & Co. KG Bearing comprising a corrosion-resistant bearing part
CN103502663A (en) * 2011-04-29 2014-01-08 谢夫勒科技股份两合公司 Bearing comprising corrosion-resistant bearing part
US8961030B2 (en) 2011-04-29 2015-02-24 Schaeffler Technologies AG & Co. KG Bearing comprising a corrosion-resistant bearing part
CN103502663B (en) * 2011-04-29 2016-11-09 舍弗勒技术股份两合公司 Bearings with corrosion-protected bearing parts
WO2014206839A1 (en) * 2013-06-28 2014-12-31 Ksb Aktiengesellschaft Fluid-conducting system with cathodic corrosion protection
CN105431572A (en) * 2013-06-28 2016-03-23 Ksb股份公司 Fluid guidance system with cathodic corrosion protection
US10731786B2 (en) 2013-06-28 2020-08-04 Ksb Aktiengesellschaft Fluid-conducting system with cathodic corrosion protection

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977