US3081251A - Self-powered cathodic protection and electrolytic descaling device - Google Patents

Self-powered cathodic protection and electrolytic descaling device Download PDF

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US3081251A
US3081251A US777498A US77749858A US3081251A US 3081251 A US3081251 A US 3081251A US 777498 A US777498 A US 777498A US 77749858 A US77749858 A US 77749858A US 3081251 A US3081251 A US 3081251A
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casing
unit
propeller
cathodic protection
anode
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Spector Dov
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • B63B59/04—Preventing hull fouling
    • 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
    • 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
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/31—Immersed structures, e.g. submarine structures

Definitions

  • This invention relates to a device which serves for cathOdic'protectiOn of the hullsof ships, water-pipes or other bodies, stationary or floating, and for the descaling of'the same.
  • -It is known to the art to construct a subrnersible D.C.supply unit, which comprises in a hermetivide d for on theideck'of the vessel, while.
  • the galvanic or '7 electrolyte anodeloranodes are placedon the hull of the ship at a heightf which is normally submerged, and are preferably arranged on or about the bilge keel. Since it is. desiredto distribute the current evenly over a large area of theh'ull of the vessel,Jthe anode canbe placed at some distance from the vessel. i
  • the primary object of the present invention is to provide a self-'contained'cathodic pr'otection'and electrolytic descaling unit, which is independent of a supply of current to be fed from the coast or from the deck of the water vessel. 7
  • Afurther object of the invention is to enlargethe field of application of cathodic protection and electrolyticdescaling especially to stationary hodies, such as waterpipes, tanks, boilers and the like.
  • Titan object of the inve'ntio'n is to dispense with a transtormer rectifier within the unit.
  • FIGURE 1 is a including a cathodic protection and electrolytic descaling unit
  • propeller-shaft itself is conii ected'to drive a generator
  • the generator is hermetically sealed within the unit, but for the current line leading to one or more anodes, which are tightly in-.
  • the unit is rigidly attached to or moving within the pipe or other vessel in such away that its propeller isexposed tothe flow of water. 'The speed of the propeller is controllable by an adjustable gearing-means provided for on the unit.
  • negative 'pole continuously makes contact with the body to be protectedor descaled, such asawater-pipe, while the positive pole is connected to theanode or anodes on the casing in constant contact with the electrolyte,such as water.
  • the unit may be self-propelled and connected to and kept spaced from, the bilge keel by any suitable means.
  • tanks or other 2 of the unit may be adjusted to move the unit within the pipe at a speed dependent on the velocity of the water within the pipe or at a lower speed. Suitable brakes may be provided. In this manner, self-adjustment of the descaling operation at the normal rate of the water supply may beaccomplished.
  • a plurality or" units may be inserted in sequence to run at predetermined distances spaced'from each preceding and following unit inthe water line, so that the descaling and anticorrosive operation may take place continuously.
  • the device according to the invention is capable of meeting the requirements for'higher currents necessary-to achieve cathodic protection at the more intense corrosion conditions caused by greater velocities-of the electrolyte.
  • the unit of the present invention is simultaneously capable thereof, by carrying a conventional pipewall scraper attachment, and/or by utilizingipart of the current from its generatorto heat'a heater'mounted on the surface of the unit to melt the wax formation along its path.
  • the unit structure may of course be used solely for mechanical scraping.
  • FIGURE 2 shows diagrammatically an alternative'elejc' trical connection of'a unit shown in FIGURE l;
  • - roUREs is a side view' r a ship in water with a trail:
  • FIGURE 4 is a plan'viewjof a floating ship with twjo trailing units, one on each side;
  • FIGURE Sis a front view of a vessel with two units, rigidly attached'to the ship.
  • the pipe 1 of casing is closed at its front'and rear ends by caps '5 and 6 made of insulating material hermetically shutting 011 the room 4.
  • the caps are held in position on the'casing by a number of tie bars 20.
  • the unit glides on the inner wall of pipe 1 on casters 7, two being shown spaced atthe front on a centrally located shaft 10, each by means of a leg 13, the legs mounted opposite to each other with a central bearing 12, through which also turns the shaft 10.
  • a third caster is shown arranged at the opposite end of the unit;
  • One front caster 7 is shown mounted on a gear 8, forming a part of a geartrain ending with a worm reduction gear 9, the latter mounted on shaft 10.
  • the shaft 10 bears at itsfront edge a propeller 11 while its opposite end protrudes, through cap 6 and a sealing ring 14 arranged in the latter, into the room-4.
  • a D.C. generator 15 and at its rear end a com -mutator'16, are mounted on shaft 7 10. of shaftltl runs in bearingsl17.
  • the anode is jcontinuously' exposed to the fluid, running through the" pipe which functions as the electrolytes 1A 7 I bfentcablell is attached to the-negativeiterminal of the commutator and leads throughithe-rear cap 5,:"se'aled: against the electrolyte by a'stuflingbox with glan dfg22, to, r the spider o f the rearcasterjl"Thus thefcurrentflows through fanode 19 to the wall efihe im 'lwhich con: stitutes thecathode and back through cable 2 1;
  • V -In the embodimentshown in FIGURE '2 the alternator 3 produces 19 and; the negative "terminal to the rear caster 7Q I -i
  • off casters means journalirig said casters "onisaid casingexternally thereof, for rotation about' discrete axes uorrnalto the axis of' rotatio n" off said propeller, said casters being” arranged to guide said device through? tubular passageway bytcontact with thefwalls thereof;
  • cylindrical I or scrapers whichiusuallyjhave the-shape of coiled wire, cylindrical I or scrapers are employed, they preferably are of increasing' diameters' fron1 front to rear.
  • a .propeller type knife or knives mayibe rigidly interposed between the propeller-".11 and casters .7, mounted rigidly on shaft '10,"or the propeller 11 itself equipped-with sharp edges may perform asecon'dary' cutting and scraping function.
  • the unit I may be provided with; an electricheateroutilizing for thisfpurpose a portion of the currentfromthefgenerator.
  • the casin 3 itself rn'ayjbe connected fby con'ventional aneanstoserve asthe heater. .Th
  • the unit serve:independentlyfof.its cathodic] Zprotection and descaling. functionyor lin additionthereto, f,
  • propellers er the units g I By'i'a 'a 1eizs,; below thefjwater line trailing at the aft.
  • Ihe propellerin thiscase is' preferably arranged at gtherarend oflthe unit, a
  • FIGURES th'funits 527 are rigidly attached each at V v V bilgekeel 29, by rigid bars30 in a plane below thebilge keel.
  • .ILA mobile cathodic liquidstightvcasing having erotection device comprising a 7 v q ametallic wall portion, generator means mounted within saidcasing and having positive 7 extending through one said cap, a propellerfiit'ed on said a shaft exteriorly of said casing; a driving connection inte 75rior1y of said casing, between said shaft and said generamounted in said casing an ,and drive nieansconnecting' said propeller withatlea'st I one said caster to efiect simultaneous rotationj thereof with said propeller' 4.
  • V 1 ,5-.'A mobile cathodic protection device comprising a tallic' wall portion of said "casing, mounted withinsaid easingand havin'g p'ofl V tive output terminals; a cathode fixed with' sa'i 7 liquid-tight casing having anode means'compris'ing amd I casing externally thereof "and -electricall y insulated therefrom, ta firstlead connectingjtlie positive output termina 'of,
  • saidi'generator means with 'fsaid "anode means, a second lead insulated: from saidncasing'ian'd connecting the ne aid generator fmean means by and in re pons terrelanve translation, bet
  • aliquidtight casing comprising'a section (if-metallic tubehaving a longitudinal axis of symmetry and first and ,jse'cond di-electric caps secured to the respective ends of said tube to seal the same,'a,generator mounted withinsaid casing, ashaft journaled, coaxially of the axis of said tube and 7 'jdelvice f irigclaiin fbi said v I cathode terminal comprising'abracketQfiXed 'Withand insula'ted'frorn saidcasingone of saidicastersb'eiug' jo'urf,
  • a propeller mounted within said casing, a propeller journaled on said casing exteriorly thereof for rotation on said axis in response to translation of said casing through a liquid, a driving connection between said propeller and the rotor of said generator, and comprising a shaft extending through a wall of said casing, a cathode lead extending through a wall of said casing for electrical connection with an object to be protected, and electrical connections between output terminals of said generator and said anode and cathode lead, respectively, said anode in electrically conductive relationship with the casing.
  • a device for cathodic protection comprising, a

Description

March 12, 1963 D. SPECTOR SELF-POWERED CATHODIC PROTECTION AND ELECTROLYTIC DESCALING DEVICE 2 Sheets-Sheet 1 Filed Dec. 1, 1958 Dov SPECTOR March 12,- 1963 D. SPECTOR 3,081,251
SELF-POWERED CATHODIC PROTECTION AND ELECTROLYTIC DESCALING DEVICE Filed Dec. 1, 1958 2 Sheets-Sheet 2 United States Patent Ofl 3,031,251 Patented Mar. 12, 1963 See 1 3,081,251 SELF-POWERED CATHODIC PROTECTION AND ELECTROLYTIC DESCALING-DEVIGE Dov specton'Citrus-l-louse, 22 Harakevet St,
1 2. 1 TelAviv, Israel 1 Filed Dec. -1, 1958, Ser. No. 777,493 Claims priority, application Israel Oct. 31 1958 .11 Claims. (Cl. 204-196) This invention relates to a device which serves for cathOdic'protectiOn of the hullsof ships, water-pipes or other bodies, stationary or floating, and for the descaling of'the same. -It is known to the art to construct a subrnersible D.C.supply unit, which comprises in a hermetivide d for on theideck'of the vessel, while. the galvanic or '7 electrolyte anodeloranodes are placedon the hull of the ship at a heightf which is normally submerged, and are preferably arranged on or about the bilge keel. Since it is. desiredto distribute the current evenly over a large area of theh'ull of the vessel,Jthe anode canbe placed at some distance from the vessel. i
The primary object of the present invention is to provide a self-'contained'cathodic pr'otection'and electrolytic descaling unit, which is independent of a supply of current to be fed from the coast or from the deck of the water vessel. 7
I Afurther object of the invention is to enlargethe field of application of cathodic protection and electrolyticdescaling especially to stationary hodies, such as waterpipes, tanks, boilers and the like. 1
Batman object of the inve'ntio'n is to dispense with a transtormer rectifier within the unit.
.,'According to the invention,: the unit is equipped with FIGURE 1 is a including a cathodic protection and electrolytic descaling unit;
aj'lpiopeller, driven by fluid -flow within the pipe. The
propeller-shaft itself is conii ected'to drive a generator,
either of the unipolar orbip0lar type. The generator is hermetically sealed within the unit, but for the current line leading to one or more anodes, which are tightly in-.
s'erted intoithe outer wall of the unit. 3 The unit is rigidly attached to or moving within the pipe or other vessel in such away that its propeller isexposed tothe flow of water. 'The speed of the propeller is controllable by an adjustable gearing-means provided for on the unit. The
negative 'pole continuously makes contact with the body to be protectedor descaled, such asawater-pipe, while the positive pole is connected to theanode or anodes on the casing in constant contact with the electrolyte,such as water.
sponse more or less current, respectively.
The unit may be self-propelled and connected to and kept spaced from, the bilge keel by any suitable means.
In using the unit for water pipes, the propeller pitch For operation the interior ofpipes, tanks or other 2 of the unit may be adjusted to move the unit within the pipe at a speed dependent on the velocity of the water within the pipe or at a lower speed. Suitable brakes may be provided. In this manner, self-adjustment of the descaling operation at the normal rate of the water supply may beaccomplished.
5 For a continuous protection of the water pipes, a plurality or" units may be inserted in sequence to run at predetermined distances spaced'from each preceding and following unit inthe water line, so that the descaling and anticorrosive operation may take place continuously.
Experience shows that the greater is the speed of flow against the vessel or in the water pipe, the greater is the ratio of corrosion. The device according to the invention is capable of meeting the requirements for'higher currents necessary-to achieve cathodic protection at the more intense corrosion conditions caused by greater velocities-of the electrolyte. T
Often when 'oil, brine or other fluids are conveyed through a'pipe causing destructive deposits, sediments and other accumulations such as wax, it is desirable to combine the cathodic protection and electrolytic descaling with a mechanical scraping. The unit of the present inventionis simultaneously capable thereof, by carrying a conventional pipewall scraper attachment, and/or by utilizingipart of the current from its generatorto heat'a heater'mounted on the surface of the unit to melt the wax formation along its path. The unit structure may of course be used solely for mechanical scraping.
Other objects and many of the attendant advantages of this invention will be readily appreciated asthe same becomes better understood by reference'to the following detailed descriptionwhen considered in connection with the accompanying drawingsjin which like reference numerals designate like parts throughout theffigures thereof and wherein; V j
longitudinal cross section through a pipe FIGURE 2 shows diagrammatically an alternative'elejc' trical connection of'a unit shown in FIGURE l;
- roUREs is a side view' r a ship in water with a trail:
ing unit of the present invention, dragging operablyfattached thereto; 7 e t FIGURE 4 is a plan'viewjof a floating ship with twjo trailing units, one on each side;
FIGURE Sis a front view of a vessel with two units, rigidly attached'to the ship. In the embodiment shown inFIGURE 1 the pipe 1 of casing is closed at its front'and rear ends by caps '5 and 6 made of insulating material hermetically shutting 011 the room 4. The caps are held in position on the'casing by a number of tie bars 20. The unit glides on the inner wall of pipe 1 on casters 7, two being shown spaced atthe front on a centrally located shaft 10, each by means of a leg 13, the legs mounted opposite to each other with a central bearing 12, through which also turns the shaft 10.
A third caster is shown arranged at the opposite end of the unit; One front caster 7 is shown mounted on a gear 8, forming a part of a geartrain ending with a worm reduction gear 9, the latter mounted on shaft 10. The shaft 10 bears at itsfront edge a propeller 11 while its opposite end protrudes, through cap 6 and a sealing ring 14 arranged in the latter, into the room-4. In the front of room 4 a D.C. generator 15, and at its rear end a com -mutator'16, are mounted on shaft 7 10. of shaftltl runs in bearingsl17.
, knife, or "prorieller.
211116 casings fuuetiomasan anode.
j asascraperjand/orwaxjrernover. V. l, g
In the ja a rrangenients' shown'in'FIGURES13 5, units, H
' aritofthat shown in FIGURE 1 maybe used, :The'
' are orn'itted'. The units thehull area andffthereby 'iinifor distance "from, the
a The rear end 18 uThepositive terminalof the commutator connects with fa'nj inert anode element lgsuch asgraphite, platinum,
clad of copper, which anode in the example shown in 'FIGURE 1 forms-an integral part ofthe'anodecasing 3.
The anode is jcontinuously' exposed to the fluid, running through the" pipe which functions as the electrolytes 1A 7 I bfentcablell is attached to the-negativeiterminal of the commutator and leads throughithe-rear cap 5,:"se'aled: against the electrolyte by a'stuflingbox with glan dfg22, to, r the spider o f the rearcasterjl"Thus thefcurrentflows through fanode 19 to the wall efihe im 'lwhich con: stitutes thecathode and back through cable 2 1;
V -In the embodimentshown in FIGURE '2 the alternator 3 produces 19 and; the negative "terminal to the rear caster 7Q I -i When the unit is to be'used for purposes of mechanical scraping of" deposits, sediments or waninwater" or oil V 'f c'onduita 'the frontend of the sh'aftmay be extended-and provided with one orinoi-e conventional, pipe'scrapers, a
@Slip rings 24 arranged adjacent to the alternator in'ake connection-with a rectifier 25, theposnf "tive terminator which is connected tojthe anode element said first and second leads. V e i r L V 3. A cathodic protectiondevice as 'inclairn l, ajplua and negative outputterrninals, apropell'er journaled on said casing externally thereof for rotation by and in re- I sponse to relative translation between said casing and a liquid in'which it is immersed, a driving connection between said propeller and said generator means, acathode terminal fixed with 'saidcasing externallythereof, a first lead connecting 'said 'positivetoutput terminal with said metallic wall portion to-thereby place said positive output 1 terminal in direct 'electr'icalconta'ct with a liquid in which j the deviee-is immersed, and asec'ond lead connecting said negative output "terminal. with said, cathode terminal; f
g .2. A cathodic'protection device as,recitedinielairn lj a said generator means including an alternator, andla rec- Y tifier connected'between the outputof said alternator'jand 'jirality. off casters, means journalirig said casters "onisaid casingexternally thereof, for rotation about' discrete axes uorrnalto the axis of' rotatio n" off said propeller, said casters being" arranged to guide said device through? tubular passageway bytcontact with thefwalls thereof;
whichiusuallyjhave the-shape of coiled wire, cylindrical I or scrapers are employed, they preferably are of increasing' diameters' fron1 front to rear.
A .propeller type knife or knives mayibe rigidly interposed between the propeller-".11 and casters .7, mounted rigidly on shaft '10,"or the propeller 11 itself equipped-with sharp edges may perform asecon'dary' cutting and scraping function.
If a plurality v, 'For removal 'of deposits capableof melting, the unit I may be provided with; an electricheateroutilizing for thisfpurpose a portion of the currentfromthefgenerator.
The casin 3 itself rn'ayjbe connected fby con'ventional aneanstoserve asthe heater. .Th
is will notinterfere with a Thus the unit ma serve:independentlyfof.its cathodic] Zprotection and descaling. functionyor lin additionthereto, f,
ters propellers er the units g I By'i'a 'a 1eizs,; below thefjwater line trailing at the aft. Ihe propellerin thiscase :is' preferably arranged at gtherarend oflthe unit, a
propeller and generator fiowsfas,indicatedjbythe arrows =hull ofthe vessel, The spacing of the unit remote from causes unifiorm' currentfdistribut I cathodie'protection. T, I
A i two un tsgare wshowrijattached..to the (if the vessel.
lIn FIGURES th'funits 527are rigidly attached each at V v V bilgekeel 29, by rigid bars30 in a plane below thebilge keel. In each of thearr-angementss'hown'in FIGURES 3-5 the units-are permanently sub: 7' inergcd'inwater. r 7
1 It should be understood, of course, that the foregoing disclosure "relates 'to only preferred embodimentsof 'the.
l Thecurrent produced within the unit by means either 5 "FIGURE 13 and thus jgives cathodic protection I to the;
i-ai iqn'id fi hi casingih e j a wall portion for'ming anode means, a'cathodefleadjexten 50,
over the hull 5 5' belo the-W r e. V v ,o'f thevessel andgspacedjfron them, bo thjren-i w idering cathodio brotectiop t the starboard and port side invention'and that it is intended tocover all changes and 'rnodifieations of "the examples 'of the invention'herein i chosen for the purposes of the disclosure, which do not constitute-departures from thespirit and scope of the in- 'yentionset forthtintheappended claims. i 7 f Iclaim: .ILA mobile cathodic liquidstightvcasing having erotection device comprising a 7 v q ametallic wall portion, generator means mounted within saidcasing and having positive 7 extending through one said cap, a propellerfiit'ed on said a shaft exteriorly of said casing; a driving connection inte 75rior1y of said casing, between said shaft and said generamounted in said casing an ,and drive nieansconnecting' said propeller withatlea'st I one said caster to efiect simultaneous rotationj thereof with said propeller' 4. A cathodic protection naled in said bracket." V 1 ,5-.'A mobile cathodic protection device comprising a tallic' wall portion of said "casing, mounted withinsaid easingand havin'g p'ofl V tive output terminals; a cathode fixed with' sa'i 7 liquid-tight casing having anode means'compris'ing amd I casing externally thereof "and -electricall y insulated therefrom, ta firstlead connectingjtlie positive output termina 'of,
saidi'generator means with 'fsaid "anode means, a second lead insulated: from saidncasing'ian'd connecting the ne aid generator fmean means by and in re pons terrelanve translation, bet
h I s iinrners anode means being 'nlelectr a ly conduetive, relat onsh 6. A mobile unit, orcathod 4 ,iorotection electrically eonducti ing through a wall'of saidcasingjto' the"euterior thereof and electrically insulatedth e rrom,;a,-D;..,c. generator" I v ai ing-electrical connections between Qits positive 'and' negative outputf terminals and ,said, anode means and"cathode lead, respectiy'ely,
peller rneansjournal'ed ons'a'id casing exteriorly thereof forr'otation by and in response to. relative movement betwe'enlsaid cas'ing' andaliqhid in which itisti i mersedg and a driving shaftconnectiori'between s'aidprooelleri I means" anidl said 7 generator, 1'
7,. Ajunit a :recitedji'n claim *ajsfaid asin {damaging j r 'e'ctr'ic .end caps se;
tivej ends of said tube, fsaid .d'rivingshaft gextending through'one saidrend cap,-said anode being electrically. attached to the inside wall'ofsaid tube, andfsaijd cathode. leadextending-through the otherfsaid end cap. a, 1
' 8. In a mobile unit for ,cathodicjprotection, aliquidtight casing comprising'a section (if-metallic tubehaving a longitudinal axis of symmetry and first and ,jse'cond di-electric caps secured to the respective ends of said tube to seal the same,'a,generator mounted withinsaid casing, ashaft journaled, coaxially of the axis of said tube and 7 'jdelvice f irigclaiin fbi said v I cathode terminal comprising'abracketQfiXed 'Withand insula'ted'frorn saidcasingone of saidicastersb'eiug' jo'urf,
. ,ndnggg; I a
an anode in a conducting portion of one wall thereof, a
generator mounted within said casing, a propeller journaled on said casing exteriorly thereof for rotation on said axis in response to translation of said casing through a liquid, a driving connection between said propeller and the rotor of said generator, and comprising a shaft extending through a wall of said casing, a cathode lead extending through a wall of said casing for electrical connection with an object to be protected, and electrical connections between output terminals of said generator and said anode and cathode lead, respectively, said anode in electrically conductive relationship with the casing.
10. A mobile unit as recited in claim 9, and a plurality of casters connected with said casing externally thereof, all said casters being journaled on parallel axis normal to said longitudinal axis and cooperating to support said casing for translation in and along a conduit.
11. A device for cathodic protection comprising, a
- cylindrical metallic tube, first and second end caps of dielectric mater-ial secured over the respective ends of said tube to form a liquid-tight casing having a first central longitudinal axis, a shaft. journaled in one said cap for rotation on said axis, generator means mounted in said casing and connected with one end of said shaft to be driven thereby,- a propeller fixed on the other end of said shaft for rotation by and in'response to translation of said casing through and relatively to a liquid in which it is immersed, an anode, fixed in one wall of said tube, a cathode terminal fixed to the other said cap, a first lead connecting the positive output of said generator means with said anode, a second lead passing through said other cap and connecting the negative output of said generator means with said cathode terminal, a guide caster journaled exteriorly of said casing on a second axis fixed relatively thereto normal to said first axis, and a driving connection between said shaft and said caster, said anode in electrically conductive relationship with the casing.
References Cited in the file of this patent UNITED STATES PATENTS 525,304 Woods Aug. 28, 1894 868,798 McLaughlin Oct. 22, 1907 1,831,835 Allee Nov. 17, 1931 2,021,519 Polin Nov. 19, 1935 2,276,714 Brown Mar. 17, 1942 2,370,288 Brolinson Feb. 27, 1945 2,530,524 Hlavin Nov. 21, 1950 2,863,819 Preiser Dec. 9, 1958 2,916,429 Vossnack et a1 Dec. 8, 1959 FOREIGN PATENTS 865,083 Great Britain Apr. 12, 1961

Claims (1)

1. A MOBILE CATHODIC PROTECTION DEVICE COMPRISING A LIQUID-TIGHT CASING HAVING A METALLIC WALL PORTION, GENERATOR MEANS MOUNTED WITHIN SAID CASING AND HAVING POSITIVE AND NEGATIVE OUTPUT TERMINALS, A PROPELLER JOURNALED ON SAID CASING EXTERNALLY THEREOF FOR ROTATION BY AND IN RESPONSE TO RELATIVE TRANSLATION BETWEEN SAID CASING AND A LIQUID IN WHICH IT IS IMMERSED, A DRIVING CONNECTION BETWEEN SAID PROPELLER AND AID GENERATOR MEANS, A CATHODE TERMINAL FIXED WITH SAID CASING EXTERNALLY THEREOF, A FIRST LEAD CONNECTING SAID POSITIVE OUTPUT TERMINAL WITH SAID METALLIC WALL PORTION TO THEREBY PLACE SAID POSITIVE OUTPUT TERMINAL IN DIRECT ELECTRICAL CONTACT WITH A LIQUID IN WHICH THE DEVICE IS IMMERSED, AND A SECOND LEAD CONNECTING SAID NEGATIVE OUTPUT TERMINAL WITH SAID CATHODE TERMINAL.
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Cited By (10)

* Cited by examiner, † Cited by third party
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US3536601A (en) * 1968-03-07 1970-10-27 Inland Steel Co Process for acid pickling
FR2327142A1 (en) * 1975-10-07 1977-05-06 Sebald Ralf ELECTRIC CURRENT GENERATOR FOR SAILBOATS
US4211625A (en) * 1978-09-11 1980-07-08 Borg-Warner Corporation Impressed current cathodic protection system for submersible downhole pumping assembly
DE3590517T1 (en) 1984-10-17 1986-10-30 Trest "Južvodoprovod", Krasnodar Device for cleaning the inner surface of pipelines from deposits and for the formation of a protective layer
CN105736896A (en) * 2014-12-07 2016-07-06 中国石油化工股份有限公司 Hot wax-bearing crude oil pipeline auxiliary starting device
WO2016186919A1 (en) * 2015-05-20 2016-11-24 Board Of Regents, The University Of Texas System Electromagnetic pig for oil and gas pipelines
CN108543779A (en) * 2018-05-15 2018-09-18 繁昌县通民机械制造有限公司 A kind of pipeline sewage disposal robot
US10744543B2 (en) 2017-11-16 2020-08-18 Saudi Arabian Oil Company Apparatus and method for in-situ cathodic protection of piggable water pipelines
CN114929939A (en) * 2019-10-18 2022-08-19 沃尔沃遍达公司 Propeller arrangement in cathodic protection system
IT202100008279A1 (en) * 2021-04-01 2022-10-01 Silvestro Scotto DEVICE FOR THE CATHODIC PROTECTION OF METALLIC COMPONENTS OF BOATS

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
US3081251A (en) * 1958-10-31 1963-03-12 Spector Dov Self-powered cathodic protection and electrolytic descaling device
CN106926991B (en) * 2017-03-15 2018-08-24 浙江工业大学 A kind of device for removing marine surface dirt
CN110721967B (en) * 2019-10-21 2021-09-07 安徽诺乐知识产权服务有限公司 Boiler water pipe belt cleaning device

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US868798A (en) * 1905-02-20 1907-10-22 Robert Mclaughlin Means for obtaining power from flowing water.
US1831835A (en) * 1929-11-06 1931-11-17 Herbert D Allee Generator for motor boats or the like
US2021519A (en) * 1933-12-12 1935-11-19 Polin Inc Corrosion preventative
US2276714A (en) * 1941-06-06 1942-03-17 Louie A Brown Fluid motor
US2370288A (en) * 1940-08-01 1945-02-27 Bengt G Brolinson Electrolytic protection of metal surfaces
US2530524A (en) * 1945-05-16 1950-11-21 William S Hlavin Liquid treating device
US2863819A (en) * 1955-08-25 1958-12-09 Herman S Preiser Insoluble trailing anode for cathodic protection of ships
US2916429A (en) * 1956-06-12 1959-12-08 Konink Rotterdamsche Lloyd N V Device for the electrolytic protection of a ship's metal skin against corrosion
GB865083A (en) * 1958-10-31 1961-04-12 Dov Spector Improvements in or relating to devices for cathodic protection and the prevention and removal of incrustation

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US525304A (en) * 1894-08-28 Water-purifier
US868798A (en) * 1905-02-20 1907-10-22 Robert Mclaughlin Means for obtaining power from flowing water.
US1831835A (en) * 1929-11-06 1931-11-17 Herbert D Allee Generator for motor boats or the like
US2021519A (en) * 1933-12-12 1935-11-19 Polin Inc Corrosion preventative
US2370288A (en) * 1940-08-01 1945-02-27 Bengt G Brolinson Electrolytic protection of metal surfaces
US2276714A (en) * 1941-06-06 1942-03-17 Louie A Brown Fluid motor
US2530524A (en) * 1945-05-16 1950-11-21 William S Hlavin Liquid treating device
US2863819A (en) * 1955-08-25 1958-12-09 Herman S Preiser Insoluble trailing anode for cathodic protection of ships
US2916429A (en) * 1956-06-12 1959-12-08 Konink Rotterdamsche Lloyd N V Device for the electrolytic protection of a ship's metal skin against corrosion
GB865083A (en) * 1958-10-31 1961-04-12 Dov Spector Improvements in or relating to devices for cathodic protection and the prevention and removal of incrustation

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536601A (en) * 1968-03-07 1970-10-27 Inland Steel Co Process for acid pickling
FR2327142A1 (en) * 1975-10-07 1977-05-06 Sebald Ralf ELECTRIC CURRENT GENERATOR FOR SAILBOATS
US4102291A (en) * 1975-10-07 1978-07-25 Ralf Sebald Electrical generator for a sailboat
US4211625A (en) * 1978-09-11 1980-07-08 Borg-Warner Corporation Impressed current cathodic protection system for submersible downhole pumping assembly
DE3590517T1 (en) 1984-10-17 1986-10-30 Trest "Južvodoprovod", Krasnodar Device for cleaning the inner surface of pipelines from deposits and for the formation of a protective layer
US4891115A (en) * 1984-10-17 1990-01-02 Shishkin Viktor V Apparatus for cleaning the inner surface of a pipeline from deposits and for forming a protective coating
CN105736896B (en) * 2014-12-07 2018-03-16 中国石油化工股份有限公司 Hot waxy oil pipeline auxiliary actuating apparatus
CN105736896A (en) * 2014-12-07 2016-07-06 中国石油化工股份有限公司 Hot wax-bearing crude oil pipeline auxiliary starting device
WO2016186919A1 (en) * 2015-05-20 2016-11-24 Board Of Regents, The University Of Texas System Electromagnetic pig for oil and gas pipelines
US10744543B2 (en) 2017-11-16 2020-08-18 Saudi Arabian Oil Company Apparatus and method for in-situ cathodic protection of piggable water pipelines
US11072005B2 (en) 2017-11-16 2021-07-27 Saudi Arabian Oil Company Apparatus and method for in-situ cathodic protection of piggable water pipelines
CN108543779A (en) * 2018-05-15 2018-09-18 繁昌县通民机械制造有限公司 A kind of pipeline sewage disposal robot
CN114929939A (en) * 2019-10-18 2022-08-19 沃尔沃遍达公司 Propeller arrangement in cathodic protection system
CN114929939B (en) * 2019-10-18 2024-03-22 沃尔沃遍达公司 Propeller device in cathode protection system
IT202100008279A1 (en) * 2021-04-01 2022-10-01 Silvestro Scotto DEVICE FOR THE CATHODIC PROTECTION OF METALLIC COMPONENTS OF BOATS
WO2022208464A1 (en) * 2021-04-01 2022-10-06 Silvestro Scotto Device for the cathodic protection of metal components of boats

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