DE2919057A1 - Sacrificial anode for cathodic boiler protection - with indicator plunger for anode exhaustion unaffected by temp. changes - Google Patents

Sacrificial anode for cathodic boiler protection - with indicator plunger for anode exhaustion unaffected by temp. changes

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Publication number
DE2919057A1
DE2919057A1 DE19792919057 DE2919057A DE2919057A1 DE 2919057 A1 DE2919057 A1 DE 2919057A1 DE 19792919057 DE19792919057 DE 19792919057 DE 2919057 A DE2919057 A DE 2919057A DE 2919057 A1 DE2919057 A1 DE 2919057A1
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DE
Germany
Prior art keywords
sacrificial anode
rod
cap
anode according
sacrificial
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
DE19792919057
Other languages
German (de)
Inventor
Ludwig Hoessle
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19792919057 priority Critical patent/DE2919057A1/en
Publication of DE2919057A1 publication Critical patent/DE2919057A1/en
Pending legal-status Critical Current

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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
    • C23F13/22—Monitoring arrangements therefor
    • 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
    • C23F13/18—Means for supporting electrodes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • F24H9/455—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means for water heaters

Abstract

Sacrificial anode consists of a metal bar which is bonded to a metal cap to hold it in a boiler wall. A blind hole in the upper part of the anode leads to a cavity in which a small red piston can slide. An O-ring prevents the piston movement due to temperature changes but the entry of boiler water moves the piston outward so that its stem protrudes outside. This indicates that the sacrificial anode is due for renewal, without false alarms by temperature induced changes.

Description

"Opferanode" "Sacrificial anode"

Die Erfindung bezieht sich auf eine Opferanode gemäß der im Oberbegriff des Anspruches 1 erwähnten Art. Opferanoden dienen durch Eigenverbrauch dem Korrosionsschutz von Kesseln, die flüssige Medien, insbesondere Wasser, beinhalten.The invention relates to a sacrificial anode according to the preamble of claim 1 mentioned type. Sacrificial anodes are used to protect against corrosion of boilers that contain liquid media, especially water.

Das Anzeige-Element zeigt an, wenn die Anode verbraucht ist.The display element shows when the anode is used up.

Solche Anoden sind bekannt, siehe DT-PS 23 51 566. Bei diesen erfolgt zu Beginn ihres Einsatzes auch dann ungewollt eine Anzeige, wenn die Temperatur in dem die Anode aufnehmenden Behälter sich erhöht. Durch kurzzeiotEes Entlüften kann die Anzeige rückgängig gemacht werden.Such anodes are known, see DT-PS 23 51 566. This takes place at the beginning of their use also an unwanted display when the temperature in which the anode receiving container increases. By briefly venting the display can be reversed.

Der Erfindung liegt die Aufgabe zugrunde, diese Anode zu verbessern, und zwar insbesondere derart auszubilden, daß eine Anzeige nur dann erfolgt, wenn die Opferanode verbraucht ist.The invention is based on the object to improve this anode, and in particular to be designed in such a way that a display only takes place when the sacrificial anode is used up.

Diese Aufgabe wird erfindungagem§ß wie im Kennzeichen des Anspruches 1 angegeben gelöst.This task is according to the invention as in the characterizing part of the claim 1 stated solved.

Wird erfindungsgemäß das Element einer entsprechend grossen Reibung unterworfen, so wird dadurch eine sehr einfache Weiterentwicklung erzielt.According to the invention, the element of a correspondingly large amount of friction subject, a very simple further development is thereby achieved.

Eine weitere Verbesserung der Erfindung besteht dait, daß der Stab in die Kappe eingeklebt ist. Auf diese Weise wird erreicht, daß man ein Innengewinde in der Kappe, dessen Herstellung relativ teuer ist, und ein Außengewinde auf dem der Kappe zugewandten Ende des Stabes vermeidet.Another improvement of the invention is that the rod is glued into the cap. In this way it is achieved that one has an internal thread in the cap, which is relatively expensive to manufacture, and an external thread on the the end of the rod facing the cap avoids.

Erfindungsgemäß soll als Kappe vorzugsweise ein Kaltziehteil verwendet werden, an das ein Rohrstück mit Auflengewinde angepunktet ist. Solche Kappen sind handelsüblich als Heizkörper-Blindstopfen erhältlich. Der Vorteil dieser Kappen besteht darin, daß ihre internationalen Normgrössen zu den ebenfalls genormten Stäben passen. Es gibt Stäbe mit folgenden Durchmessern: 33 mm, 26 mm, 22 mm und 18 mm.According to the invention, a cold-drawn part is preferably used as the cap to which a pipe section with a male thread is spotted is. Such caps are commercially available as radiator blind plugs. The advantage of these caps is that their international standard sizes are also among the standardized rods. There are bars with the following diameters: 33 mm, 26 mm, 22 mm and 18 mm.

Dazu können verwendet werden Kappen mit folgenden Gewindeaußendurchmessern: 1 1/4 R", 1 R", 3/4 R" und 1/2 R".For this purpose, caps with the following outer thread diameters can be used: 1 1/4 R ", 1 R", 3/4 R "and 1/2 R".

Weitere Einzelheiten der Erfindung ergeben sich aus der einzigen Figur der Zeichnung.Further details of the invention emerge from the single figure the drawing.

In dieser ist mit 1 ein Rundstab aus einem schneller als eine Kesselwand korrodierenden Material, mit 2 eine in diesem befindliche Stahlseele zur Stützung des übrigen Stabmaterials, mit 3 eine Sackbohrung, in die das Wasser bei Verbrauch des Stabmaterials eindringen kann, mit 4 eine Kappe, in die der Stab 1 eingeklebt ist, mit 5 der Kleber, mit 6 eine metallische Ringscheibe, die den elektrischen Kontakt zwischen Kesselwand und Stab 1 sicherstellt, und mit 7 ein Anzeige-Element bezeichnet, das aus einer in die Kappe 4 einschraubbaren Buchse 8, einem in dieser gleitend gelagerten roten Kolben 9 und einem O-Ring 10 besteht. Die Reibung zwischen Ring 10 und Buchse 8 ist solcher Art, daß eine Erhöhung des Druckes in dem Raum 11 aufgrund von Temperaturerhöhungen in dem Kessel noch nicht zu einer Bewegung des Kolbens 9 nach außen führt. Dieser wird vielmehr erst dann nach außen gedrückt und macht somit den Verbrauch des Stabes 1 sichtbar, wenn in den Raum 3,11 Wasser eingedrungen ist. Das kesselwandseitige Ende des Stabes 1 ist von einem Schlauch 12 umgeben, der bewirkt, daß zunächst das freiliegende Ende des Stabes 1 abgetragen wird.In this, with 1 a round rod from one is faster than a boiler wall corrosive material, with 2 a steel core located in this for support the rest of the rod material, with 3 a blind hole in which the water when consumed of the rod material can penetrate, with 4 a cap into which the rod 1 is glued is, with 5 the adhesive, with 6 a metallic washer, which the electrical Ensures contact between the boiler wall and rod 1, and with 7 a display element denotes, which consists of a screwable into the cap 4 socket 8, one in this Slidably mounted red piston 9 and an O-ring 10 consists. The friction between Ring 10 and sleeve 8 is of such a type that an increase in pressure in the space 11 does not yet cause movement due to temperature increases in the boiler of the piston 9 leads to the outside. Rather, it is only then pushed outwards and thus makes the consumption of the stick 1 visible when water is in the room 3.11 has penetrated. The boiler wall-side end of the rod 1 is from a hose 12 surrounded, which has the effect that the exposed end of the rod 1 is initially removed will.

LeerseiteBlank page

Claims (13)

AnsprUche : 1. Opferanode, bestehend aus einem Metallstab, einer Kappe an einer Stirnseite des Stabes, Uber die die Anode in einer Kesselwand gehalten wird, und einem Druckanzeigeelement, das auf den Druck in einem Raum auf der Innenseite der Kappe anspricht, dadurch g e k e n n z e i c h n e t , daß das Element (7) bei Druckanstiegen aufgrund von Temperaturerhöhungen unbeeinflußt bleibt. Claims: 1. Sacrificial anode, consisting of a metal rod, a Cap on one end of the rod, over which the anode is held in a boiler wall and a pressure indicator that indicates the pressure in a space on the inside the cap responds, thereby g e k e n n n z e i c h n e t that the element (7) at Pressure increases due to temperature increases remain unaffected. 2. OpferanodeX nach Anspruch 1, dadurch g e k e n n z e i c h -n e t , daß das Element (7) einer entsprechend großen Reibung unterworfen ist.2. Sacrificial anodeX according to claim 1, characterized in that g e k e n n z e i c h -n e t that the element (7) is subjected to a correspondingly large amount of friction. 3. Opferanode nach Anspruch 2, dadurch g e k e n n z e i c h -n e t , daß das Element (7) ein Kolben (9) ist, der in einer Buchse (8) gelagert ist.3. sacrificial anode according to claim 2, characterized in that g e k e n n z e i c h -n e t that the element (7) is a piston (9) which is mounted in a bush (8). 4. Opferanode nach Ansprüchen 2 und 3, dadurch g e -k e n n z e i c h n e t , daß ein Teil des Kolbens (9), insbesondere ein runder, am inneren Ende befindlicher kxß desselben, von einem elastischen Ring (10) umgeben ist, der die Reibung mit der Buchse (8) erzeugt.4. sacrificial anode according to claims 2 and 3, characterized g e -k e n n z e i c h n e t that part of the piston (9), in particular a round one, at the inner end located kxß of the same, is surrounded by an elastic ring (10) which the Friction with the bushing (8) is generated. 5. Opferanode nach Anspruch 4, dadurch g e k e n n -z e i c h n e t , daß Ringe (10) verschiedener Stärke vorgesehen sind, die unterschiedliche Reibungswerte bewirken, derart, daß man die Anode den Jeweiligen Druckverhältnissen anpassen kann.5. sacrificial anode according to claim 4, characterized in that g e k e n n -z e i c h n e t that rings (10) of different strengths are provided which have different coefficients of friction cause in such a way that the anode can be adapted to the respective pressure conditions. 6. Opferanode nach einem oder mehreren der Ansprüche 1-5, dadurch g e k e n n z e i c h n e t , daß der Stab (1) in die Kappe (4) eingeklebt ist.6. sacrificial anode according to one or more of claims 1-5, characterized it is noted that the rod (1) is glued into the cap (4). 7. Opferanode nach Anspruch 6, dadurch g e k e n n -z e i c h n e t , daß der Stab (1) mittels eines elektrisch leitenden Zweikomponenten-Klebers (5), der vorzugsweise Graphit enthält, mit der Kappe (4) verklebt ist.7. sacrificial anode according to claim 6, characterized in that g e k e n n -z e i c h n e t that the rod (1) by means of an electrically conductive two-component adhesive (5), which preferably contains graphite, is glued to the cap (4). 8. Opferanode nach einem oder mehreren der Ansprüche 1-7, dadurch g e k e n n z e i c h n e t , daß sich zwischen Stab (1) und Kappe (4) eine metallische Ringscheibe (6) kleineren Durchmessers befindet, die hauptsächlich den metallischen Kontakt zwischen Stab (1) und Kappe (4) erzeugt.8. sacrificial anode according to one or more of claims 1-7, characterized it is noted that between the rod (1) and cap (4) there is a metallic Ring washer (6) of smaller diameter is located, mainly the metallic Contact between rod (1) and cap (4) is generated. 9. Opferanode nach einem oder mehreren der Ansprüche 1-8, dadurch g e k e n n z e i c h n e t , daß der Stab (1) eine zur Kappe (4) hin offene Sackbohrung (3) aufweist, die sichimeben der Seele (2) oder in der Stabmitte, in die die Seele hineinragt, befindet.9. sacrificial anode according to one or more of claims 1-8, characterized it is noted that the rod (1) has a blind hole that is open towards the cap (4) (3), which is in the middle of the soul (2) or in the middle of the rod, in which the soul protrudes, is located. 10. Opferanode nach einem oder mehreren der Ansprüche 1-9, dadurch g e k e n n z e i c h n e t , daß die Kappe (4) ein Kaltziehteil ist, an das ein Rohrstück (4') mit Außengewinde angepunktet ist, wobei die Dichtigkeit zwischen diesen Teilen durch den Kleber (5) erzeugt wird.10. sacrificial anode according to one or more of claims 1-9, characterized it is noted that the cap (4) is a cold-drawn part to which a Pipe section (4 ') with external thread is spotted, the tightness is created between these parts by the adhesive (5). 11. Opferanode nach Anspruch 10, dadurch g e k e n n -z e i c h n e t , daß die Kappe (4) mit Rohrstück (4') ein handelsüblicher Reizkörper-Blindstopfen ist.11. sacrificial anode according to claim 10, characterized in that g e k e n n -z e i c h n e t that the cap (4) with pipe section (4 ') is a commercially available irritant body blind plug is. 12. Opferanode nach einem oder mehreren der Ansprüche 1-11, dadurch g e k e n n z e i c h n e t , daß der Stab (1) auf seinem kesselwandseitigen Teil von einem Kunststoffschlauch (12) überdeckt ist, der ein Abtragen des nicht bedeckten Stabteils vor einem Abtragen des die Sackbohrung (13) umgebenden Stabmaterials bewirkt.12. sacrificial anode according to one or more of claims 1-11, characterized it is noted that the rod (1) is on its boiler wall-side part is covered by a plastic tube (12), which removes the uncovered Rod part caused before the removal of the blind hole (13) surrounding rod material. 13. Opferanode nach Anspruch 12 dadurch g e k e n n -z e i c h n e t , daß das bedeckte Teil eine Länge zwischen 20 und 80 mm hat.13. Sacrificial anode according to claim 12, characterized in that it is e k e n n -z e i c h n e t that the covered part has a length between 20 and 80 mm.
DE19792919057 1979-05-10 1979-05-10 Sacrificial anode for cathodic boiler protection - with indicator plunger for anode exhaustion unaffected by temp. changes Pending DE2919057A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792919057 DE2919057A1 (en) 1979-05-10 1979-05-10 Sacrificial anode for cathodic boiler protection - with indicator plunger for anode exhaustion unaffected by temp. changes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792919057 DE2919057A1 (en) 1979-05-10 1979-05-10 Sacrificial anode for cathodic boiler protection - with indicator plunger for anode exhaustion unaffected by temp. changes

Publications (1)

Publication Number Publication Date
DE2919057A1 true DE2919057A1 (en) 1980-11-13

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DE (1) DE2919057A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018132017A1 (en) * 2017-01-12 2018-07-19 Corron As Sacrificial anode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018132017A1 (en) * 2017-01-12 2018-07-19 Corron As Sacrificial anode

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