CA1250915A - Assembly for attachement of overhead lines, specially power cables to an insulator - Google Patents
Assembly for attachement of overhead lines, specially power cables to an insulatorInfo
- Publication number
- CA1250915A CA1250915A CA000493291A CA493291A CA1250915A CA 1250915 A CA1250915 A CA 1250915A CA 000493291 A CA000493291 A CA 000493291A CA 493291 A CA493291 A CA 493291A CA 1250915 A CA1250915 A CA 1250915A
- Authority
- CA
- Canada
- Prior art keywords
- loop
- insulator
- wires
- assembly
- pin
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
- H02G7/053—Suspension clamps and clips for electric overhead lines not suspended to a supporting wire
- H02G7/056—Dead-end clamps
-
- 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
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator
Landscapes
- Insulators (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention refers to an assembly for the attachment of overhead lines, specially power lines to an insulator, having a loop formed of at least two twisted wires, which are bent at approximately the midline in a bend region, forming two legs so as to lodge said cables between the twisted legs thus formed, the bend region being smooth and untwisted.
The object of the invention lies in providing an assembly that dispenses with the utilization of a connection element convent-ionally employed in the installation of overhead networks.
Such object is attained by the invention due to the fact that the wires of said loop can be separated in two groups in the bend region, a pin having at least one retention element being provided, said pin cooperating with an insulator and insertable in the loop.
The present invention refers to an assembly for the attachment of overhead lines, specially power lines to an insulator, having a loop formed of at least two twisted wires, which are bent at approximately the midline in a bend region, forming two legs so as to lodge said cables between the twisted legs thus formed, the bend region being smooth and untwisted.
The object of the invention lies in providing an assembly that dispenses with the utilization of a connection element convent-ionally employed in the installation of overhead networks.
Such object is attained by the invention due to the fact that the wires of said loop can be separated in two groups in the bend region, a pin having at least one retention element being provided, said pin cooperating with an insulator and insertable in the loop.
Description
. PR-7295 12S(~JIS
ASSEMBLY FOR ATTACHMENT OF OVERHEAD LINES
SPECIALLY POWER CABLES TO AN INSULATOR
The present invention refers to an assembly for the attach-ment of overhead lines, specially of power cables to an insul-ator, with a loop formed of at least two twisted wires, which are bent in the middle at a bending region, forming two twisted legs, so as to lodge said cables between the twisted legs thus formed, the bending region being smooth and untwisted.
Loops of the aforementioned kind have for a long time been employed in overhead transmission lines.
Accordingly, in a co~ventional manner, the insulators are installed on the transmission posts or towers and the power cables are attached to the insulators in the following manner: the region of bending of the loop is placed over a connection element, the helically t~listed legs are braided over a section of the cables and the connection element is then a~tached to the respective insulator in a projection provided with an opening.
Such connection element consists basically of two plates parallel to each other, having axial bores made near one end thereof and one essentially cylindrical element intercofinecting them near the other end, all this made in on~ single cast part.
The region of loop bend is fitted bet~Jeen said plates over the cylindrical element, and between the two plates is fitted the insulaltor projection, provided with an opening with which said axial bores are aligned for intrduction of a transfixing pin that ensures the attachment between the connection ele~ent and the insulator.
In spite of its broad utilization, the need of providing an additional connection element bet~leen the loop and the inslllator is a disadvantage.-Accordingly, the object o~ the invention is to provide an assembly of said kind, that dispenses ~iith the utilizationof the connection element, thereby substantially redllcing the installation costs and assuring nevertheless a quite simple and safe attachment.--1- e~
~250915 PR-7295 Such object is attained, according to the invention, by the fact that the loop wires are separable into two groups in the bend region, there being provided a pin with at least one retention element, said pin cooperating with an insu1ator and insertable in the loop.
With the assembly accord;ng to the model, it is possible to make the connection thereof directly to the insulator, by separating the wires in the bend region, then adapting the fitting pro~ection of the insulator between ~he separated wires and passing the pin through the loop and through the oper.ing in said projection, the retaining element or elements assuring a safe attachment of the assembly.
The sonfig~ration and manner of fitting will now be described in further detail, on the basis of execution examples represented on the drawings. The figuras show: -Figure 1 is a ~reformed 1DOP;
Figure 2 is a cross-section view of the bend of a lool) with t.~o stems;
Figure 3 is a cross section view of the bend of a loop with four stems;
Figure 3a is a view corresponding to the loop of figure 3, the stems being ~eparated two by two; and Figure 4 is a loop joining a power cable to an insulator, according to the model.
As can be seen on figure 1, the loop 1 is composed of various wires 4, for example of galvanized steel or aluminized steel, united to ealch other by means of adhesi~e, resin or any other means.-For utilization in an assembly according to the model,the loop has the bend region free of the t~JiSt that characterizes both legs 3.
Figure 2 illustrates only the bend region 2 of a loop having t~lo wires 4, and figure 3 shows in an analogous manner a bend region 2 of a loop with 4 wires.
Figure 3a illustrates the loop of figure 3, the wires 4 being separated two by two, forming an ;nterll~ediate space wherein will be located the fitting projection 7 of an insulator 6, as shown on figure 4.
1 25 09 ~5 As can be seen on the last ~igure, the utilization of a connection e1ement of the kind initially referred to is no longer necessary.-Accordingly. start;ng from a loop 1 as illustrated onfigure 1, it suffices to separate the wire9- 4 in the bend region 2 free from twisting, braid the legs 3 around the power ca~les 5 (figure 4)~ introduce the fitting projection 7 of insulator S in the space formed between the separated wire9 and, finally, to fit a round-head pin 8 - provided with safety rings 9 and counter-pin 10 - through the loop (not shown of projection 7.
A po~nted cap 11, provided with a vertex facing the direction opposite the insulator 6 facilitates the fitting of loop 1, as in this manner a separation of the two groups of wires 4 is autnmatically obtained upon pressing of loop 1 against said cap 11.
In spite that a loop having an even number of wires allows for a better distribution of forces in a better mech-anical behaviour when attached to insulator, it is also obviously possiDle to provide a loop having an odd number of wires.
Accordingly, this apparently simple improvement introduces enormous economic ~dvantages in the installation of bverhead networks. since an integral part (that is, the connection element) can be abolisheu WiL;lOUL~ however, causing diff~culties to the installation operation, and providing a very relia~le and safe attach~ent.
It must be understood that the invention is not limited to the example described, but only by the claims set forth hereinbelow.
ASSEMBLY FOR ATTACHMENT OF OVERHEAD LINES
SPECIALLY POWER CABLES TO AN INSULATOR
The present invention refers to an assembly for the attach-ment of overhead lines, specially of power cables to an insul-ator, with a loop formed of at least two twisted wires, which are bent in the middle at a bending region, forming two twisted legs, so as to lodge said cables between the twisted legs thus formed, the bending region being smooth and untwisted.
Loops of the aforementioned kind have for a long time been employed in overhead transmission lines.
Accordingly, in a co~ventional manner, the insulators are installed on the transmission posts or towers and the power cables are attached to the insulators in the following manner: the region of bending of the loop is placed over a connection element, the helically t~listed legs are braided over a section of the cables and the connection element is then a~tached to the respective insulator in a projection provided with an opening.
Such connection element consists basically of two plates parallel to each other, having axial bores made near one end thereof and one essentially cylindrical element intercofinecting them near the other end, all this made in on~ single cast part.
The region of loop bend is fitted bet~Jeen said plates over the cylindrical element, and between the two plates is fitted the insulaltor projection, provided with an opening with which said axial bores are aligned for intrduction of a transfixing pin that ensures the attachment between the connection ele~ent and the insulator.
In spite of its broad utilization, the need of providing an additional connection element bet~leen the loop and the inslllator is a disadvantage.-Accordingly, the object o~ the invention is to provide an assembly of said kind, that dispenses ~iith the utilizationof the connection element, thereby substantially redllcing the installation costs and assuring nevertheless a quite simple and safe attachment.--1- e~
~250915 PR-7295 Such object is attained, according to the invention, by the fact that the loop wires are separable into two groups in the bend region, there being provided a pin with at least one retention element, said pin cooperating with an insu1ator and insertable in the loop.
With the assembly accord;ng to the model, it is possible to make the connection thereof directly to the insulator, by separating the wires in the bend region, then adapting the fitting pro~ection of the insulator between ~he separated wires and passing the pin through the loop and through the oper.ing in said projection, the retaining element or elements assuring a safe attachment of the assembly.
The sonfig~ration and manner of fitting will now be described in further detail, on the basis of execution examples represented on the drawings. The figuras show: -Figure 1 is a ~reformed 1DOP;
Figure 2 is a cross-section view of the bend of a lool) with t.~o stems;
Figure 3 is a cross section view of the bend of a loop with four stems;
Figure 3a is a view corresponding to the loop of figure 3, the stems being ~eparated two by two; and Figure 4 is a loop joining a power cable to an insulator, according to the model.
As can be seen on figure 1, the loop 1 is composed of various wires 4, for example of galvanized steel or aluminized steel, united to ealch other by means of adhesi~e, resin or any other means.-For utilization in an assembly according to the model,the loop has the bend region free of the t~JiSt that characterizes both legs 3.
Figure 2 illustrates only the bend region 2 of a loop having t~lo wires 4, and figure 3 shows in an analogous manner a bend region 2 of a loop with 4 wires.
Figure 3a illustrates the loop of figure 3, the wires 4 being separated two by two, forming an ;nterll~ediate space wherein will be located the fitting projection 7 of an insulator 6, as shown on figure 4.
1 25 09 ~5 As can be seen on the last ~igure, the utilization of a connection e1ement of the kind initially referred to is no longer necessary.-Accordingly. start;ng from a loop 1 as illustrated onfigure 1, it suffices to separate the wire9- 4 in the bend region 2 free from twisting, braid the legs 3 around the power ca~les 5 (figure 4)~ introduce the fitting projection 7 of insulator S in the space formed between the separated wire9 and, finally, to fit a round-head pin 8 - provided with safety rings 9 and counter-pin 10 - through the loop (not shown of projection 7.
A po~nted cap 11, provided with a vertex facing the direction opposite the insulator 6 facilitates the fitting of loop 1, as in this manner a separation of the two groups of wires 4 is autnmatically obtained upon pressing of loop 1 against said cap 11.
In spite that a loop having an even number of wires allows for a better distribution of forces in a better mech-anical behaviour when attached to insulator, it is also obviously possiDle to provide a loop having an odd number of wires.
Accordingly, this apparently simple improvement introduces enormous economic ~dvantages in the installation of bverhead networks. since an integral part (that is, the connection element) can be abolisheu WiL;lOUL~ however, causing diff~culties to the installation operation, and providing a very relia~le and safe attach~ent.
It must be understood that the invention is not limited to the example described, but only by the claims set forth hereinbelow.
Claims (5)
1. Assembly for the attachment of overhead lines specially of power cables to an insulator, having a loop formed of at least two twisted wires which are bent approximately in the midline in a bend region, forming two legs so as to lodge said cables between the twisted legs thus formed, the bend region being smooth and untwisted characterized in that the wires of said loop can be separated in two groups in the bend region, a pin being provided with at least one retention element, said pin cooperating with an insulator and insertable in the loop.
2. Assembly according to claim 1, characterized in that two safety rings and one counter-pin are employed as retention elements, cooperating with a round-head pin.
3. Assembly according to claim 1 or 2, characterized in that a pointed cap having a vertex facing a direction opposite the insulator is applied over a fitting projection of insulator.
4. Assembly according to claim 1, characterized in that the loop has an even number of wires.
5. Assembly according to claim 4, characterized in that four wires are provided in said loop.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA858216A ZA858216B (en) | 1985-10-25 | 1985-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1250915A true CA1250915A (en) | 1989-03-07 |
Family
ID=25578126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000493291A Expired CA1250915A (en) | 1985-10-25 | 1985-10-18 | Assembly for attachement of overhead lines, specially power cables to an insulator |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS62119812A (en) |
CA (1) | CA1250915A (en) |
CH (1) | CH670326A5 (en) |
DE (1) | DE3538401A1 (en) |
FR (1) | FR2589616B1 (en) |
NL (1) | NL185642C (en) |
SE (1) | SE456622B (en) |
ZA (1) | ZA858216B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4333799C1 (en) * | 1993-09-10 | 1995-01-05 | Deutsche Forsch Luft Raumfahrt | Fastening element and a method for producing said fastening element |
FR3083378A1 (en) * | 2018-06-27 | 2020-01-03 | Preformed Line Products (France) | PREFORMED ANCHORING DEVICE FOR AERIAL POWER OR SIGNAL LINE CABLE |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6511357A (en) * | 1964-09-08 | 1966-03-09 | ||
FR1428499A (en) * | 1964-10-14 | 1966-02-18 | Productions Ind A P I Atel | Advanced clamp housing for anchoring twisted cables |
US3406513A (en) * | 1966-12-21 | 1968-10-22 | Fanner Mfg Co | Dead end |
US3455099A (en) * | 1968-03-29 | 1969-07-15 | Textron Inc | Dead end |
CA1127729A (en) * | 1978-06-02 | 1982-07-13 | Gary R. Dickerson | Helically preformed wire gripping device having different pitch angles within each convolution thereof |
US4409432A (en) * | 1981-08-05 | 1983-10-11 | Societe Anonyme Dite: Ceraver | Binding retaining an electrical conductor in a circumferential groove around a rigid insulator |
BR8107318A (en) * | 1981-11-11 | 1983-06-21 | Plp Produtos Para Linhas Prefo | FTAA FOR COUPLING A CABLE TO A SUPPORT |
US4439897A (en) * | 1981-12-22 | 1984-04-03 | Preformed Line Products Company | Dead-end appliance for linear bodies |
-
1985
- 1985-10-18 CA CA000493291A patent/CA1250915A/en not_active Expired
- 1985-10-23 NL NLAANVRAGE8502900,A patent/NL185642C/en not_active IP Right Cessation
- 1985-10-25 ZA ZA858216A patent/ZA858216B/xx unknown
- 1985-10-29 DE DE19853538401 patent/DE3538401A1/en active Granted
- 1985-10-30 SE SE8505126A patent/SE456622B/en not_active IP Right Cessation
- 1985-11-04 FR FR8516298A patent/FR2589616B1/en not_active Expired
- 1985-11-08 CH CH4799/85A patent/CH670326A5/de not_active IP Right Cessation
- 1985-11-14 JP JP60253887A patent/JPS62119812A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CH670326A5 (en) | 1989-05-31 |
ZA858216B (en) | 1986-05-13 |
NL185642C (en) | 1990-06-01 |
FR2589616B1 (en) | 1988-04-29 |
JPS62119812A (en) | 1987-06-01 |
NL8502900A (en) | 1987-05-18 |
NL185642B (en) | 1990-01-02 |
FR2589616A1 (en) | 1987-05-07 |
SE8505126L (en) | 1987-05-01 |
SE8505126D0 (en) | 1985-10-30 |
DE3538401A1 (en) | 1987-04-30 |
DE3538401C2 (en) | 1987-09-03 |
SE456622B (en) | 1988-10-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |