EP0417656A2 - Tube de caoutchouc pour l'isolation thermique des cables électriques - Google Patents

Tube de caoutchouc pour l'isolation thermique des cables électriques Download PDF

Info

Publication number
EP0417656A2
EP0417656A2 EP90117255A EP90117255A EP0417656A2 EP 0417656 A2 EP0417656 A2 EP 0417656A2 EP 90117255 A EP90117255 A EP 90117255A EP 90117255 A EP90117255 A EP 90117255A EP 0417656 A2 EP0417656 A2 EP 0417656A2
Authority
EP
European Patent Office
Prior art keywords
rubber
band
wrapped
rubber tube
tube
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.)
Withdrawn
Application number
EP90117255A
Other languages
German (de)
English (en)
Other versions
EP0417656A3 (en
Inventor
Alfio Deregibus
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.)
Tubigomma Deregibus Srl
Original Assignee
Tubigomma Deregibus Srl
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 Tubigomma Deregibus Srl filed Critical Tubigomma Deregibus Srl
Publication of EP0417656A2 publication Critical patent/EP0417656A2/fr
Publication of EP0417656A3 publication Critical patent/EP0417656A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat

Definitions

  • the present invention relates to a rubber tube for thermally insulating electric cables which can be used particularly but not exclusively for containing and insulating electric connection cables in the iron and steel industry, for example for electric induction furnaces.
  • Tubes composed of special rubber mixes with excellent electrical insulation properties are currently used as sheaths for containing and cooling electric cables in manufacturing plant, such as electric induction furnaces, in the iron and steel industry.
  • the tubes are protected from the hot environment in which they must operate through the insertion of asbestos or aramide or glass fiber fabrics according to the operating conditions or to the requirements of the operators.
  • the tubes are arranged in a loop between two coupling points, at least one of which is movable.
  • the tubes are gathered in bundles, and are subjected to frequent and rapid movements which causes the contacting surfaces of adjacent tubes to rub against each other and thus be subjected to wear.
  • the tubes are almost always gathered in bundles and are therefore arranged very close to one another, the rubbing together of the contacting surfaces of the tubes causes, in a short period of time, the wear of the various layers of the tube.
  • the deterioration of the outer fabric which has a heat-shielding function, produces a rapid process of carbonization of the internal rubber, caused by the high temperatures at the worksite whereat the tubes are used.
  • sleeves of various materials are currently fixed, by means of metal clamps, at regular distances, on the outer surface of the tubes.
  • Said sleeves have the function of mutually spacing the tubes apart, so as to protect the covering of each tube from wear caused by frictional contact with adjacent tubes.
  • the aim of the present invention is to provide a rubber tube particular for containing and insulating electric cables used in manufacturing plant in the iron and steel industry, which eliminates the disadvantages described above in known types, which is more economical in assembly and maintenance, and which has a longer operating life.
  • a consequent primary object of the invention is to provide a rubber tube for containing and thermally insulating electric cables which can be produced with conventional methods.
  • Another important object is to provide a rubber tube for containing and thermally insulating electric cables which allows an immediate viewing of the state of the protective parts which are subjected to wear.
  • a rubber tube for insulating and containing electric cables characterized in that it comprises a rubber band wrapped on a covering layer, which has a contrasting color and forms a raised helical ridge, a fabric containment band being wrapped in a helix on said covering layer between the edges of said rubber band on which it is superimposed, said rubber and fabric bands being welded to one another and to the rest of the structure by a vulcanization operation.
  • a tube according to the invention comprises an inner layer 1 made of rubber with excellent electrical insulation characteristics, produced with conventional methods for producing wrapped tubes.
  • the inner layer 1 is covered by an insulating layer 2 made of heat-proof fabric, for example asbestos, aramide, glass fiber etc., which conveniently has a light coloring, for example white.
  • an insulating layer 2 made of heat-proof fabric, for example asbestos, aramide, glass fiber etc., which conveniently has a light coloring, for example white.
  • Said rubber band 3 which forms a raised helical ridge on the layer 2, has a significant thickness, at least in the range of ten millimeters, and constitutes an element adapted for resisting abrasion and rough handling, protecting the heat-insulating fabrics and therefore the entire body of the tube.
  • a containment band 4 made of fabric is wrapped in a helix on the covering layer 2, between the edges of the rubber band 3 on which it is superimposed; said band 4 is welded to said rubber band 3 and to the rest of the structure of the tube by a final conventional vulcanization operation which is usually performed to produce wrapped tubes.
  • the helical ridge constituted by the rubber band 3 acts as element for absorbing shocks and rough-handling and for resisting abrasion to which it is subjected and which cause it to wear, in the course of time, until the lower white layer 2 is exposed.
  • the tube can be installed for a longer duration with respect to current ones and in any case can visually inform the user of its state of wear, thereby entailing evident savings from the point of view of maintenance.
  • the materials employed, as well as the dimensions, may be any according to the requirements.

Landscapes

  • Insulating Bodies (AREA)
EP19900117255 1989-09-13 1990-09-07 Rubber tube for thermally insulating electric cables Withdrawn EP0417656A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4169389 1989-09-13
IT8941693A IT1233115B (it) 1989-09-13 1989-09-13 Tubo in gomma per il raffreddamento di cavi elettrici.

Publications (2)

Publication Number Publication Date
EP0417656A2 true EP0417656A2 (fr) 1991-03-20
EP0417656A3 EP0417656A3 (en) 1991-11-06

Family

ID=11253082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900117255 Withdrawn EP0417656A3 (en) 1989-09-13 1990-09-07 Rubber tube for thermally insulating electric cables

Country Status (2)

Country Link
EP (1) EP0417656A3 (fr)
IT (1) IT1233115B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2381377A1 (fr) * 1977-02-21 1978-09-15 Trefimetaux Cables electriques de securite, non armes, resistant au feu
EP0106708A1 (fr) * 1982-10-15 1984-04-25 Axon'cable S.A. Revêtement isolant
EP0125747A2 (fr) * 1983-02-18 1984-11-21 Briscoe Manufacturing Company Fil conducteur électrique résistant à la chaleur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2381377A1 (fr) * 1977-02-21 1978-09-15 Trefimetaux Cables electriques de securite, non armes, resistant au feu
EP0106708A1 (fr) * 1982-10-15 1984-04-25 Axon'cable S.A. Revêtement isolant
EP0125747A2 (fr) * 1983-02-18 1984-11-21 Briscoe Manufacturing Company Fil conducteur électrique résistant à la chaleur

Also Published As

Publication number Publication date
IT8941693A0 (it) 1989-09-13
IT1233115B (it) 1992-03-14
EP0417656A3 (en) 1991-11-06

Similar Documents

Publication Publication Date Title
RU2719223C2 (ru) Вязаное полотно из металлического сплава для высокотемпературных изоляционных материалов
RU2704458C2 (ru) Тепловая защита, выполненная вязанием из множества материалов за одно целое, для использования в промышленности и для транспортных средств
FI87832C (fi) Skyddshoelje mot yttre vaerme- och eldpaoverkan foer straengformiga varor samt saett foer framstaellning av ett skyddshoelje
EP0131990B1 (fr) Cordon d'étanchéité de céramique
CN102803813A (zh) 具有高温耐磨涂层的织物套筒及其组装，构造和固化方法
KR20190031493A (ko) 니트 관형 보호 슬리브 및 그의 구성 방법
US2952001A (en) Electrical heating tape and method of making
EP0417656A2 (fr) Tube de caoutchouc pour l'isolation thermique des cables électriques
WO2018230798A1 (fr) Dispositif d'isolation de tuyau ayant une fonction de protection contre les vibrations
EP1834150B1 (fr) Isolation de four
US20200232132A1 (en) Braided protective sleeve with heat-shrinkable yarns and method of construction thereof
CA2145504A1 (fr) Gaine a l'epreuve du feu et methode de fabrication connexe
US20190382951A1 (en) Textile sleeve having elastomeric coating with indicator markings therein and method of construction thereof
HU183789B (en) Electrode for arc furnaces
DE10236033A1 (de) Verfahren und Anordnung zum Überwachen des Erhaltungszustands der feuerfesten Auskleidung von Schmelzöfen
KR100824338B1 (ko) 성형기용 단열커버
GB2302490A (en) Wrap-around insulated heater for injection moulding machine
RU23522U1 (ru) Рукав для водоохлаждаемого силового кабеля
CN210295983U (zh) 一种用于步进电机的抗高温防软化连接线
US7214912B1 (en) Installation method and material system for inductive billet heating coils
GB2110909A (en) Heating fabric
US2939099A (en) Metal clad heating strip with ribbon element
US2200115A (en) Terminal outlet for industrial furnaces
KR20120064195A (ko) 크랭크샤프트 부분형단조시 전체가열로를 이용한 부분가열 방법
US1903106A (en) Waterproof heat insulating tape

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19920424

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930401