US3161580A - Graphite joints of highly uniform electrical resistance - Google Patents

Graphite joints of highly uniform electrical resistance Download PDF

Info

Publication number
US3161580A
US3161580A US82558A US8255861A US3161580A US 3161580 A US3161580 A US 3161580A US 82558 A US82558 A US 82558A US 8255861 A US8255861 A US 8255861A US 3161580 A US3161580 A US 3161580A
Authority
US
United States
Prior art keywords
pin
engaging portion
pins
graphite
joint
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.)
Expired - Lifetime
Application number
US82558A
Other languages
English (en)
Inventor
Edward C Thomas
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.)
SGL Carbon Corp
Original Assignee
Great Lakes Carbon Corp
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 Great Lakes Carbon Corp filed Critical Great Lakes Carbon Corp
Priority to US82558A priority Critical patent/US3161580A/en
Priority to ES0273591A priority patent/ES273591A1/es
Priority to GB1193/62A priority patent/GB966619A/en
Priority to FR884769A priority patent/FR1310932A/fr
Priority to DE19621515744 priority patent/DE1515744A1/de
Priority to CH43462A priority patent/CH418427A/de
Application granted granted Critical
Publication of US3161580A publication Critical patent/US3161580A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/101—Mountings, supports or terminals at head of electrode, i.e. at the end remote from the arc
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/14—Arrangements or methods for connecting successive electrode sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/57—Distinct end coupler
    • Y10T403/5706—Diverse serial connections

Definitions

  • graphite anodes In employing graphite anodes in electrolytic cells such as those of the-mercury cell type, it is customary to support the graphite anodesin a horizontal plane by graphite pins which not only serve to mechanically support the anode in the cell in the proper position but also serve to conduct electrical current from an external power supply to the graphite anode.
  • the anode plates vary in size depending upon the cell design but in general in a mercury cell, the anode assembly usually consists of a rectangilar graphite plate mechanically supported and electrically joined to an outside power source by two graphite pins. More pins are employed if the size of the anode plates used is increased. Several such anode plates are employed in a single electrolytic cell;
  • the joint or connection between the pins and the anode plates not only have sufficient mechanical strength to support the anodes during their useful life but also that the electrical resistance between each of the connecting pins and the anodes be as low and at the same time as uniform as possible, throughout the entire cell.
  • Unduly high resistances, or numerous or wide variations in the electrical resistances of these connections or joints in the cell cause non-uniform deterioration of the anodes.
  • the uneveness of wear and deterioration throughout the cell gives rise to complex operating problems, and requires much more frequent adjustment and subsequent dismantling for repair or reconstruction of the cells than is or would be necessary if'each of the joint resistances were uniformly low and fell within a narrow range of variation in resistance.
  • the conventional practice of coupling connecting pins to anodes is to thread the ends of the pins and to screw them into threaded sockets in the anode.
  • the types of threaded pins employed are generally three; viz., a pipe thread wherein the outer diameters of the threads are just a little less than the diameter of the main body portion of the pin, a tapered thread wherein the diameter of the threads uniformly diminishes the further the threads extend from the main body portion of the pin, and a shoulder type threaded pin which has a straight thread 3,l6l,5h Patented ec.
  • Tool chatter marks or high spots left on the threads result in high and also uneven or non-uniform joint resistances.
  • the joint resistances for these pins also vary considerably depending on the amount of torque employed to tighten them, the optimum amount employed varying for each type of pin.
  • the machining costs attendant upon using threaded pins are, therefore, high and the joint resistances non-uniform.
  • FIGURE 2 illustrates this type of joint as well as the improvement of this invention, which will be discussed in more detail hereinafter.
  • These joints depend upon the fact that graphite is somewhat elastic or springy or pressure-compliant in nature and may be forced or compressed into sockets whose internal diam eters are slightly less than the external diameters of the portions of the pins forced into same. This difference in diameter, which may be termed interference should not be too great for if this occurs, the engaging portion of the pin or the socket of the anode begins to fail in its springiness.
  • assembly forces of approximately 700 pounds and 2400 pounds are typical for interferences of 4 thousandths and 16 thousandths respectively.
  • the force necessary to open or pull apart the joints is approximately equal to the closing force for interferences up to 12 thousandths.
  • the force required to open the joint is from about 25% to about 50% less than the closingforce due to incipient flaws which had been induced in thesocket wall by excessive tensile strain or by other causes.
  • FIGURE 1 is a top view of a pin coupled to an electrical conducting member such as an anode plate;
  • FIGURE 2 is a vertical sectional view of the pinelectrical conducting member of FIGURE 1 and is taken through the line 22 of said figure;
  • FIGURE 3 is an end view of the bottom of the pin of FIGURE 2;
  • FIGURE 4 is a vertical sectional View of another pinelectrical conducting member type of joint embraced within the present invention.
  • FIGURE 5 is an end View of the joint of FIGURE 4, taken along the line 55 of said figure;
  • FIGURES 6 and 8 are bottom end views of connecting pins showing other modifications of the invention.
  • FIGURES 7 and 9 are fragmentary vertical sectional views of the pins of FIGURES 6 and 8 and taken along the lines 7-7 and 99 respectively of said figures.
  • FIGURE 10 is a vertical sectional view of a modifica- 4 tion of the pin-electrical conducting member type of joint shown in FIGURE 4.
  • All of the joints of this invention are characterized by the employment of graphite connecting pins which are press-fitted by means of unthreaded engaging portions into nonthreaded sockets in the electrical conducting mem bers to which the pins are coupled.
  • the pins may generally be described as comprised of a main body portion 1, adapted (such as by means of a threaded well 8) for coupling to an external power supply, and an engaging portion 2 which is adapted to be press-fitted, or forcefitted, or frictionally engaged in non-threaded sockets of the members It) to which the pins are coupled.
  • the engaging portion of the pin is of a general cylindrical shape and in a preferred form is flared into and integral with the main body portion of the pin, and chamfered at the peripheral edge of its face.
  • main body portion though most conveniently circular in cross section, may also be square, octagonal, etc, if desired, and that although its cross-sectional area will generally be greater than the cross-sectional area of the engaging portion, this is not essential to the practices of this invention, the dimensions of the engaging portion of the pin in relation to the socket into which it is inserted being the important consideration.
  • Each of the pins also possess means within the engaging portion of the pin for making the engaging portion 2 more pressure compliant, as it is forced into the socket, than it would be if the means were absent.
  • the means within the engaging portion for accomplishing this may be an annular kerf 3, typically from about to about ,5, inch wide, which is substantially concentric with the circumference of the engaging portion, as is the case with the pin shown in FIGURES 2 and 3.
  • it may be a cylindrical hole 4 having a fiat base, or a modified type of cylindrical hole 4a having a sloping base the centers of which holes are on the approximate axis of the pin, as with the pins of FIGURES 4 and 10 respectively.
  • the means may comprise three straight noncontiguous or non-joining kerfs 5 of substantially equal length, none of which extend as far as the pins periphery, and which kerfs, if extended to intersect with each other would approximately form an equilateral triangle, the middle of each of the kerfs being substantially equidistant from the periphery of the engaging portion of the pin, as with the pin of FIGURES 6 and 7.
  • the means may also be shown in FIGURES 8 and 9 wherein three straight kerfs 6 of substantially equal length, none of which extends as far as the periphery are also employed but which kerfs intersect with each other to approximately form a triangle. As with the kerfs of FIGURE 6, the middle of each of these kerfs is substantially equidistant from the periphery of the engaging portion of the pin.
  • the means employed for making the engaging portion more pressure compliant extends longitudinally from the bottom face of said portion toward the main body portion. Because it is the engaging portion only which takes part in the pressure fitting of the pin into the socket, it may be unnecessary to extend the kerfs into the main body portion.
  • Such cleavege also, if it extends above the height of the socket, permits electrolyte to get between the pin and anode when the'jointsare used in electrolytic cells. This is undesirable because the effects of even the mild and inchoate electrolytic action which would take place in the cavitacious confines of the joined members would tend to erode the graphite structure much as it does at the bottom of the plate. Degeneracy of the graphite structure would ultimately lead to a looser-higher resistance joint.
  • a kerf either alone or in conjunction with the pressure compliant increasing means already described, which cleaves the periphery at no more than one place. This might sometimes be resorted to in order to gain an additional degree of pressure complying or an alternative manner for obtaining same, if it can be done without too greatly adversely affecting the foregoing discussed properties sought for the joint. It is considered that any peripheral cleavage more than this would detract more from the other qualities sought or required for the joint than it would bring or add to same in the way of increased pressure complying.
  • peripheral cleavage is preferred but a maximum of one region of peripheral cleavage may some times be resorted to when practicing the invention.
  • the nature of the mechanical properties of a particular type of graphite may also sometimes demand it.
  • the kerf should extend no further from the bottom face of the pin than to within about 80-90% of the depth of penetration of the engaging portion of the pin into the anode socket, so that the liquid tightness of the joint is not impaired. In other words, it should extend longitudinally from the face of the engaging portion toward, but short of, the main body portion. This depth of penetration limitation is not required if the pin is employed where liquid-tightness is not required, or where the pin has no peripheral cleavage.
  • a kerf which cleaves the periphery, it may typically be a radial slot extending out to the periphery from the annular kerf of FIGURE 2. Or it might comprise a single Archimedean curving kerf, one end of which extends out as far as the peripheral contact surface.
  • the precise dimensions and locations of the kerfs or other means employed to make the engaging portions of the pins more pressure compliant are not critical and may be varied widely within the spirit of the invention.
  • the diameter of the annulus 3 and its dimension are capable of wide variation. So also are the diameters of the holes 4 and 4a, or the distances of the kerfs 5 and 6 from the periphery of the pin. The only important factors limiting these variations are that the increased pressure compliance desired should be obtained, thereby equalizing the contact forces of the engaging portion of the pin in the socket, and that the mechanical stability of the pin in the socket should not be impaired.
  • a graphite pin electrically coupling an external power supply to an electrical conducting member having-a non-threaded socket receiving an en gaging portion of said pin under compression, said pin being characterizedby having a main body portion coupled to saidengaging portion and to an external power supply, said engaging'portion being interiorly cut away to make it more pressure compliant than said engaging portion would be if the interior cutting were absent, said cutaway portion extending longitudinally from the face of the engaging portion in the direction of the main body portion and terminating within said graphite pin.
  • non-threaded socket of the electrical conducting member is cylindrical in shape and wherein the engaging portion of the pin is of a general cylindrical shape flared into and integral with the main body portion of the pin, and chamfered at the peripheral edge of its face.
  • An electrical combination according to claim 1 wherein the interior cutting which makes the engaging portion more pressure compliant comprises an annular kerf substantially concentric with the circumference of the engaging portion.
  • an electrical combination according to claim 1 wherein the interior cutting which makes the engaging portion more pressure compliant comprises three straight non-contiguous keris of substantially equal length, none of which extend as far as the periphery of said engaging portion, and which if extended to intersect with each other would approximately form an equilateral triangle, the middle of each of these kerfs being substantially equidistant from the periphery of said engaging portion.
  • an electrical combination according to claim 1 wherein the interior cutting which makes the engaging portion more pressure compliant comprises three straight kerfs of substantially equal length, none of which extend as far as the periphery of said engaging portion, and which kerts intersect with each other to approximately form a triangle, the middle of each of these kerfs being substantially equidistant from the periphery of said engaging portion.
  • An electrical combination according to claim 1 wherein the interior cutting which makes the engaging portion more pressure compliant comprises a hole of a generally cylindrical shape, the center of which hole is on the approximate axis of said pin.
  • An electrical system for use in an electrolytic cell comprising in combination a graphite anode having a non-threaded socket adapted to receive an engaging portion of a graphite coupling pin under compression, and a graphite coupling pin frictionally engaged in said socket, said pin being characterized by having a main body portion coupled to said engaging portion and to an external power supply, said engaging portion being interiorly cut away to make it more pressure compliant than said engaging portion would be if the interior cutting were absent, said cut away portion extending longitudinally from the face of the engaging portion in the direction of the main body portion and terminating within said graphite pin, and said engaging portion also having a peripheral cleavage extending inwardly to said cutaway portion, said peripheral cleavage being completely surrounded by and lying entirely within said socket.
  • An electrical system for use in an electrolytic cel comprising in combination a graphite anode having 2 non-threaded socket adapted to receive an engaging por tion of a graphite coupling pin under compression, ant a graphite coupling pin frictionally engaged in said socket said pin being characterized by having a main body portion coupled to said engaging portion and to an ex ternal power supply, said engaging portion being in teriorly cut away to make it more pressure compliant than said engaging portion would be if the interior cutting were absent, said cut away portion extending longitudinally from the face of the engaging portion in the direction of the main body portion and terminating within said graphite pin.
  • non-threaded socket of the graphite anode is cylindrical in shape and wherein the engaging portion of the pin is of a general cylindrical shape flared into and integral with the main body portion of the pin, and chamfered at the peripheral edge of its face.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Dowels (AREA)
US82558A 1961-01-13 1961-01-13 Graphite joints of highly uniform electrical resistance Expired - Lifetime US3161580A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US82558A US3161580A (en) 1961-01-13 1961-01-13 Graphite joints of highly uniform electrical resistance
ES0273591A ES273591A1 (es) 1961-01-13 1962-01-12 Un dispositivo de espiga de grafito para acoplar electricamente una alimentaciën exterior de energia a un miembro conductor electrico
GB1193/62A GB966619A (en) 1961-01-13 1962-01-12 Graphite joints of highly uniform electrical resistance
FR884769A FR1310932A (fr) 1961-01-13 1962-01-13 Raccordement de connexion graphite-graphite ou graphite-métal présentant une résistance ohmique faible et uniforme
DE19621515744 DE1515744A1 (de) 1961-01-13 1962-01-13 Graphitstift als Teil einer elektrischen Steckverbindung
CH43462A CH418427A (de) 1961-01-13 1962-01-15 Graphitstift für die Verbindung einer elektrischen Zuleitung mit einem elektrisch leitenden Glied

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82558A US3161580A (en) 1961-01-13 1961-01-13 Graphite joints of highly uniform electrical resistance

Publications (1)

Publication Number Publication Date
US3161580A true US3161580A (en) 1964-12-15

Family

ID=22171940

Family Applications (1)

Application Number Title Priority Date Filing Date
US82558A Expired - Lifetime US3161580A (en) 1961-01-13 1961-01-13 Graphite joints of highly uniform electrical resistance

Country Status (6)

Country Link
US (1) US3161580A (de)
CH (1) CH418427A (de)
DE (1) DE1515744A1 (de)
ES (1) ES273591A1 (de)
FR (1) FR1310932A (de)
GB (1) GB966619A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260651A (en) * 1961-03-29 1966-07-12 Siemens Planiawerke Ag Gas and liquid tight joint of graphite bodies
US20110268146A1 (en) * 2009-01-15 2011-11-03 Ems Elektro Metall Schwanenmuhle Gmbh Graphite electrode with an electrical connecting element
WO2014118137A1 (de) * 2013-02-01 2014-08-07 Schunk Wien Gesellschaft M.B.H. Korrosionsfreie kontaktvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482176A (en) * 1948-04-03 1949-09-20 Nat Carbon Co Inc Electrode connecting pin
US2603669A (en) * 1948-10-26 1952-07-15 Union Carbide & Carbon Corp Large electrode with thermal stress relief
US2617762A (en) * 1944-10-23 1952-11-11 Solvay Anode device
DE931350C (de) * 1951-02-04 1955-08-08 Hoechst Ag Elektrodenanordnung fuer elektrolytische Zellen
US2805879A (en) * 1954-08-06 1957-09-10 Great Lakes Carbon Corp Electrode joints
US2967142A (en) * 1958-09-22 1961-01-03 Union Carbide Corp Blade electrode assembly
US2974098A (en) * 1961-03-07 Rod and plate electrode assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974098A (en) * 1961-03-07 Rod and plate electrode assembly
US2617762A (en) * 1944-10-23 1952-11-11 Solvay Anode device
US2482176A (en) * 1948-04-03 1949-09-20 Nat Carbon Co Inc Electrode connecting pin
US2603669A (en) * 1948-10-26 1952-07-15 Union Carbide & Carbon Corp Large electrode with thermal stress relief
DE931350C (de) * 1951-02-04 1955-08-08 Hoechst Ag Elektrodenanordnung fuer elektrolytische Zellen
US2805879A (en) * 1954-08-06 1957-09-10 Great Lakes Carbon Corp Electrode joints
US2967142A (en) * 1958-09-22 1961-01-03 Union Carbide Corp Blade electrode assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260651A (en) * 1961-03-29 1966-07-12 Siemens Planiawerke Ag Gas and liquid tight joint of graphite bodies
US20110268146A1 (en) * 2009-01-15 2011-11-03 Ems Elektro Metall Schwanenmuhle Gmbh Graphite electrode with an electrical connecting element
WO2014118137A1 (de) * 2013-02-01 2014-08-07 Schunk Wien Gesellschaft M.B.H. Korrosionsfreie kontaktvorrichtung
AT14715U1 (de) * 2013-02-01 2016-04-15 Schunk Wien Ges M B H Korrosionsfreie Kontaktvorrichtung

Also Published As

Publication number Publication date
CH418427A (de) 1966-08-15
GB966619A (en) 1964-08-12
FR1310932A (fr) 1962-11-30
ES273591A1 (es) 1962-07-01
DE1515744A1 (de) 1969-10-09

Similar Documents

Publication Publication Date Title
US2957716A (en) Butt joint on carbon electrodes for electric furnaces
US2375325A (en) Self-locking nut
US2661965A (en) Union which permits misalignment
US3279870A (en) Platen mounting of die set leader pins and bushings
US2616946A (en) Gasket type sealing structure having deformable metal rings
US3161580A (en) Graphite joints of highly uniform electrical resistance
US3891531A (en) Electrolytic diaphragm cells including current connection means between the cell base and anode
US1785587A (en) Electrode joint
US3173714A (en) Carbon or graphite electrode joint
US3111572A (en) Electric immersion heater assembly
US3771889A (en) Nipple-electrode assembly and joint
CN216009433U (zh) 顶管与丝杆螺母固定结构
GB1514591A (en) Electronic valves
EP0101819B1 (de) Konisches Elektrodengewinde und Verfahren zum Verbinden von zwei Elektrodenabschnitten
US3016343A (en) Anode assembly for electrolytic cell
US3771888A (en) Nipple-electrode assembly and method of making same
CN216666272U (zh) 一种用于主轴的涨紧联接装置
US3771887A (en) Nipple-electrode assembly and joint
CN216312251U (zh) 插头
CN114888545B (zh) 一种浮动压头
CN210326885U (zh) 一种潜水排污泵用电缆压盘结构
US2143048A (en) Spark plug
US3771886A (en) Nipple-electrode assembly and joint
CN211120827U (zh) 一种新型热交换器
CN212848007U (zh) 变压器套管