US3576942A - Electric insulators with spigoting elements - Google Patents

Electric insulators with spigoting elements Download PDF

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Publication number
US3576942A
US3576942A US826244A US3576942DA US3576942A US 3576942 A US3576942 A US 3576942A US 826244 A US826244 A US 826244A US 3576942D A US3576942D A US 3576942DA US 3576942 A US3576942 A US 3576942A
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United States
Prior art keywords
elements
column
walls
spigoting
substance
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Expired - Lifetime
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US826244A
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English (en)
Inventor
Thomas Caldor
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Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
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Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/14—Supporting insulators

Definitions

  • ABSTRACT A method and apparatus for developing a column, which column comprises a plurality of substantially conical elements supporting one another in a spigoting ar-, rangement, one seated in the other.
  • the elements are connected to one another by a substance such as mortar.
  • the walls of the elements are shaped such that when mortar is introduced in a controlled manner into one of the elements, there is a controlled discharge of the temporarily fluidized mortar along the ducts of prescribed contour constituted by the opposing wall surfaces of an adjacent interfitted element.
  • Another object of the invention is to avoid, in such a column, the necessity to retract these stop means upon completion of fabrication, which means usually consist of stops pegs, rings, brackets or the like, depending on the fabrication facilities available, and have as their function solely to serve as abutment points for said insulator elements, such temporary abutment points being retained in position on frames, columns, bars or other movable means.
  • a further object of the invention is to avoid the necessity prior to each scaling, to accurately relocated such abutrnents individually and to then position the elements to be assembled, likewise individually, on said abutrnents.
  • the invention accordingly relates to a method of assembling mutually spigoting insulator elements, including the steps of stacking said elements directly on top of one another after each element has received a dose of hardenable substance inside a spigot recess adapted to cooperate with a matching spigot on an associateedelement, of subjecting the stack of elements while it is being formed to a temporary fluidim'ng treatmentof the hardenable substance, of checking the flow of said substance between the several elements, andof adjusting both the fluidization (by vibration in the case of a cement mortar) and the flow in order to automatically ensure a controlled movement towards one another, into substantially equidistant positions, of the several elements of an insulator column undergoing formation, without restraining said elements on external bearing means.
  • flow control for a given substance such as cement mortar chosen of a thixotropic nature, results from both the frequency and the amplitude of the vibration applied and, in all cases, from the variable profiling of flow ducts formed in the insulator elements, which ducts gradually constrict adjacent their outlets as the tightening together of the column elements is initiated, increases and tends towards a present limit.
  • The; present invention further embraces the insulator elements for performing the above-disclosed method, which elements are assembled for mutual spigoting to form chambers and controlled flow ducts for the hard-setting substance as the insulator column is being formed.
  • the insulator elements are fonned with a recess exhibiting successive steps the dimensions of which decrease towards an end face, each step having an internal profile matching an associated external profile, the intermediate shoulders having a more open conicity than the surfaces of the steps themselves, and the shoulder nearest the opening of said recess performing the function, jointly with the external shoulder of the adjacent insulator element, of a regulator for limiting the flow of hard-setting substance.
  • a feature of one form of embodiment of such insulator elements is that the head ofeach is formed externally with a solid protrusion .thelow height of which does not completely fill the corresponding recess in the adjoining element.
  • a further feature thereof is that the inner and outer surfaces of said steps are formed with transverse grooves preferably crossed by longitudinal ribs whereby to form, with the sealing substance, means for arresting accidental rotation of one insulator element relatively to its adjoining elements.
  • the present invention likewise relates to apparatus for perfonning the method hereinbefore disclosed, and most notably a sealing machine having an operator's station with which are associated an insulator element distributor and a vibrating member, a plurality of travelling sealing-towers cooperating in succession with this station to form the necessary stack of insulator elements upon contact with the vibrating member and to restrain this stack until the sealing substance has set.
  • the machine includes an operator's station with an elevating seat associated with a control console and a cement mortar store, the seat being caused to ascend opposite a rack having tiers for distributing insulator elements stored on the sloping bottoms thereof.
  • the associated vibrating element is devised so as to be straddled by frames formed with guides, of which at least one can be retracted if necessary.
  • the stacks are formed as required on these frames, and said guides do not at all form stop means for the insulator elements in the spigoting direction, which direction is preferably the vertical direction when the weight of the insulator element is used as the mutual tightening force.
  • FIG. 1 shows a longitudinal section with partial cutaways of an insulating column according to the invention, shown upside down in the position it assumes in the course of its fabrication, with its lower part resting on an upper ferrule and its top formed by a bottom ferrule.
  • FIG. 2 shows in schematic side elevation a machine for fabricating such insulators.
  • FIG. 3 is a diagrammatic side view of an insulator element distributing rack.
  • FIG. 4 is a diagrammatic plan view of the manner of operation of the machine in FIG. 2.
  • the insulator column consists of stacked insulator elements 1, and this stack is obtained by a mutual spigoting of conical elements, each conical element being fonned adjacent its base with an annular portion 2 (hereinafter referred to as skirt").
  • Each conical element is formed in reality by a plurality of cone frustums (numbering four in the exemplary embodiment illustrated) separated from one another by shoulders 3.
  • the interior space of the element 1 comprises a first cone frustum 4 opening out via a stepped surface 5 atthe skirt end and terminating inwardly in a relativelyvery wide frustoconical shoulder 6 at the point of junction with a second cone frustum 7.
  • the latter is in turn joined via a further shoulder 8 via a smooth shoulder 14 to a third cone frustum 15 connected in turn via a frustoconical shoulder 16 to an ultimate cone frustum 17, the exterior of which is formed with a substantially flat base 18.
  • the mean slopes imparted to the surfaces of internal shoulders 5, 6, 8 and external shoulders 12, 14 and 16 are substantially equal.
  • The. substantially constant thickness imparted to thewall is such that upon spigoting into an adjoining insulator element 19, there remains, between the bottom a of the terminal recess of adjoining element 19 and the terminal spigot formed by surfaces 17 and 18 of element 1, a cavity 20 of fairly large volume and spaces 21 and 22 forming a clearance between the two elements. This clearance is reduced opposite the frustoconical shoulders.
  • the inner and outer surfaces of the inner (2, 7, 9) and outer (13, 15) spigoting cone frustums are formed with grooves 23 crossed by longitudinally directed ribs in order to create active anchoring surfaces to withstand both longitudinal stresses and torsional moments when assembly is completed and the bonding substance has set.
  • the assembly process is effected by lining the hollow part of an insulating element with a predetermined dose of a hardsetting substance and by driving the frustoconical body of an adjoining insulator element thereinto.
  • the sealing substance may be a cement mortar containing suitable proportions of cement, granular substance and water in order that it possess the required thixotropic properties such that it be fluid when subjected to vibration (such fluidity being controlled by the amplitude and frequency of the imposed vibratory motion) and such that this fluidity disappear and give way to solidification almost immediately after the vibration ceases.
  • the column of insulator elements formed thus is so arranged as to exhibit excellent bending strength, since the successive spigotings produce generous surfaces for withstanding such loads.
  • the insulating elements are preferably made of toughened glass. This material permits very effective spigoting of the elements into one another with an interposed cement mortar and moreover ensures preservation of the spigotings in the event of accidental fracturing, for should such fracturing occur such material breaks up into fragments which swell and remain in position, whereby the portions spigoted into one another remain indissolubly bonded, the only apparent damage being the disappearance of the skirts from one or two possibly broken elements. This makes for great operational reliability with such columns, for the fracturing of an-element is immediately evident through the disappearance of its skirt; moreover, there is no urgency about replacing a damaged column since it can be relied upon to remain securely in position. There is consequently no need to fear accidental interruptions of service.
  • Such insulator elements may be assembled for fabrication of an insulator column in economical fashion by means of the apparatus schematically illustrated in FIGS. 2 to 4.
  • An operator's station consists of an elevating platform 26 mounted on a jack 27 (of which only that part located above the floor is shown) and this platform supports an operator's seat 2%, a control console 29 and a mortar tank 30.
  • a rack 31 whose sloping supporting shelves 32 form slideways for the elements 1.
  • the floors 22 of the tiered compartments are provided up to the maximum height of the columns to be fabricated, and whenever the operator removes an insulator element from the compartment, the reserve elements which come after it descend along a sloping bottom 32 until they abut against an associated catch 33 located at the entrance end.
  • a rack of this kind is preferably mounted on wheels 34 in order to facilitate supply operations by allowing a full rack to be substituted for an emptied one whenever necessary.
  • each such cart 35 may cooperate with forked carts 35 having a member mounted on wheels 3%.
  • the frame of each such cart 35 comprises a lower plate 37 bearing a bowl 38, and this plate is capable of cooperating with the active head 39 of a vibrator 40 placed in a fixed position in front of the station.
  • the uprights 40a of the cart rest on bottom girders 41 carrying the wheels 36, and
  • these girders carry .on their ends forming the fork of the cart, magnetic members 42 capable of restraining the cart on positioning and restraining stops 43.
  • a platform 44 into which are fitted guides 45 for the vertical columns 46.
  • One at least of said columns is slidably mounted in a guide 45 and, responsively to a steel rope 47 and a which 48, can be lifted out of contact with plate 37 in order to release a stack of elements it as soon as the latter have been mutually spigoted and bonded together to form an insulator column, as described with reference to H6. 1.
  • three columns such as the column 46 are used in order to form a space inside which the stacked elements 1 of circular section inscribed in the triangle formed by said columns can be suitably restrained and guided without the need to provide supporting abutrnents which, in the prior art, would be required to ensure equidistant assembly of the elements 1 in a column thereof.
  • an upper plate Slidably mounted at the top of the columns is an upper plate as which is biased upwardly by tie means and a counterweight 5i), and mounted on one of the adjacent uprights is a contactor 51 for stopping and starting the vibrator 40.
  • An empty cart 35 is moved up to the work station as shown in HQ.
  • an operator removes elements 1 in succession from the appropriate level, each element being then coated with an accurately proportioned quantity of cement mortar which the operator removes with a proportioning ladle from the tank 30.
  • the elements 1 are stacked upon one another, the bottommost one on the ferrule 25 on plate 37, the vibrator 40 being caused to operate continuously during this such as to cause the generally recognized qualities of cement stacking process.
  • the vibration is maintained and a controlled flow of the cement mortar takes place, and the settling process of the corresponding column is .followed by the plate 49 which, when it reaches contact switch 51, stops the vibration.
  • the vertical position of the switch is naturally adjustable and corresponds to. a constant, fixed height for the fabricated insulator columns.
  • The'active cart 35 can then be withdrawn, as shown in FIG. 4, with the help notably of the gentle slope imparted to the part of the floor used to support the cart in-the vicinity of the operator's station.
  • the cart complete with its insulator columns, is then left to stand in a suitable location, at controlled temperature and humidity if necessary, in order to ensure proper setting and hardening of the cement mortar.
  • This cart can then be replaced by another forked cart 35 at the operator's station.
  • a column insulator built up in this way can be disengaged by means of the winch 48, which hoists the relevant column 46 and opens the guiding system laterally.
  • insulating or noninsulating joints may be inserted between sections of the column and could consist notably of special transition insulating elements.
  • an insulator element lb may-comprise, instead of an ultimate cone frustum 17 like the ordinary elements, only a bottom 18b, which may then lie very close to the end-section 18 of the immediately adjacent ordinary element, since in such adesign the ultimate'frustoconical element would in no way help to impart structural strength.
  • the counterweight 50, the winch 48 and the cable 47 could be replaced by an electric hoist mounted at the top of the cart and capable of travelling horizontally along a beam running in the direction of travel of the cart.
  • a column comprising a plurality of insulator elements supporting one another in a mutual spigoting arrangement, said elements including walls shaped for mutual spigoting and constituting chambers containing a hard-setting and temporarily fluidizable cementitious substance, said walls having inner and outer surfaces, the inner surface of one of said walls cooperating with the outer surface of an adjacent wall for constituting ducts, said ducts including means for controlling the discharge of said temporarily fluidized substance from respective chambers.

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  • Insulating Bodies (AREA)
US826244A 1968-05-22 1969-05-20 Electric insulators with spigoting elements Expired - Lifetime US3576942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR152792 1968-05-22

Publications (1)

Publication Number Publication Date
US3576942A true US3576942A (en) 1971-05-04

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US826244A Expired - Lifetime US3576942A (en) 1968-05-22 1969-05-20 Electric insulators with spigoting elements

Country Status (5)

Country Link
US (1) US3576942A (OSRAM)
BR (1) BR6909026D0 (OSRAM)
DE (1) DE1925059C3 (OSRAM)
ES (1) ES367363A1 (OSRAM)
FR (1) FR1574892A (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061515A (en) * 1976-10-12 1977-12-06 Ceraver S.A. Method of manufacturing suspension insulators for electric power lines and device for the implementation thereof
US4574019A (en) * 1984-01-18 1986-03-04 Swiss Aluminium Ltd. Process for attaching anode blocks to an anode suspension means
US20140196924A1 (en) * 2011-03-31 2014-07-17 Sediver Societe Europeenne Disolateurs en verre et Composite Dielectric element for a high-voltage insulator with great traction strength

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1093479A (en) * 1911-12-16 1914-04-14 Thomas And Sons Company R Insulator.
FR643523A (fr) * 1927-04-08 1928-09-18 Anciens Etablissements Parvill Nouvel isolateur à haute tension
CA774239A (en) * 1967-12-19 Locatelli Louis Dispositif de support d'isolateurs electriques composes d'elements s'emboitant les uns dans les autres
GB1113247A (en) * 1963-12-04 1968-05-08 Reyrolle A & Co Ltd Improvements relating to high voltage electrical insulators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA774239A (en) * 1967-12-19 Locatelli Louis Dispositif de support d'isolateurs electriques composes d'elements s'emboitant les uns dans les autres
US1093479A (en) * 1911-12-16 1914-04-14 Thomas And Sons Company R Insulator.
FR643523A (fr) * 1927-04-08 1928-09-18 Anciens Etablissements Parvill Nouvel isolateur à haute tension
GB1113247A (en) * 1963-12-04 1968-05-08 Reyrolle A & Co Ltd Improvements relating to high voltage electrical insulators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061515A (en) * 1976-10-12 1977-12-06 Ceraver S.A. Method of manufacturing suspension insulators for electric power lines and device for the implementation thereof
US4574019A (en) * 1984-01-18 1986-03-04 Swiss Aluminium Ltd. Process for attaching anode blocks to an anode suspension means
US20140196924A1 (en) * 2011-03-31 2014-07-17 Sediver Societe Europeenne Disolateurs en verre et Composite Dielectric element for a high-voltage insulator with great traction strength

Also Published As

Publication number Publication date
DE1925059C3 (de) 1979-03-15
FR1574892A (OSRAM) 1969-07-18
DE1925059A1 (de) 1970-02-05
BR6909026D0 (pt) 1973-01-09
DE1925059B2 (de) 1978-07-06
ES367363A1 (es) 1971-05-01

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