EP4260423A1 - Anchor set for anchoring overhead line conductors, particularly for electric power transmission - Google Patents

Anchor set for anchoring overhead line conductors, particularly for electric power transmission

Info

Publication number
EP4260423A1
EP4260423A1 EP21839255.3A EP21839255A EP4260423A1 EP 4260423 A1 EP4260423 A1 EP 4260423A1 EP 21839255 A EP21839255 A EP 21839255A EP 4260423 A1 EP4260423 A1 EP 4260423A1
Authority
EP
European Patent Office
Prior art keywords
connecting element
bracket
anchor set
measuring instrument
conductor
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.)
Pending
Application number
EP21839255.3A
Other languages
German (de)
French (fr)
Inventor
Francesco PALONE
Piero BERARDI
Gregorio GRECO
Roberto SPEZIE
Enrico DI VITO
Gilberto RICCI
Giovanni CELSA
Evaristo Di Bartolomeo
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.)
Terna SpA
Original Assignee
Terna SpA
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 Terna SpA filed Critical Terna SpA
Publication of EP4260423A1 publication Critical patent/EP4260423A1/en
Pending legal-status Critical Current

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
    • G01L5/103—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors fixed at one end of the flexible member
    • 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
    • H01B17/10—Fastening of insulator to support, to conductor, or to adjoining insulator by intermediate link

Definitions

  • the present invention relates to an anchor set for anchoring overhead line conductors, a device applicable in the context of the structural fastening of a line conductor for the transmission of electric power to a lattice tower.
  • each conductor is suspended by means of a plurality of lattice towers spaced apart from each other.
  • lattice towers are pylons or tubular poles extending perpendicular to the ground to which they are anchored.
  • the conductors are connected to the lattice tower structures by means of clamping elements which, in overhead power lines, comply with IEC EN 61284.
  • the line clamping elements are chosen so as to be able to withstand the maximum stresses transmitted by the conductors to the lattice tower.
  • different breaking loads are identified for the clamping elements composing the suspended equipment.
  • Anchor clamps are instead sized based on the breaking load of the conductor.
  • Anchor set is intended as the assembly of the clamping elements which connect the suspension or anchor clamps to the insulators and the latter to the lattice tower.
  • the choice of anchor sets is made, for each individual lattice tower, among those available, according to the loads (transverse, vertical and longitudinal) determined by the tension of the conductors and the features of use of the lattice tower in question (average range, upstream and downstream height difference, and deviation angle).
  • the known anchor sets comprise a button eyelet fitting having a first end connectable to the conductor and a second end connectable to the lattice tower.
  • the first end is connected to the conductor by means of a chain of insulators which ensure the dielectric seal between the conductor and the lattice tower, while the second end is connected to the lattice tower by means of a C-shaped bracket.
  • the known anchor sets further comprise a pin configured to articulately connect the bracket to the button eyelet fitting.
  • the pin is housed in a through hole at the second end of the button eyelet fitting and is inserted in a special pair of holes of the bracket.
  • the known type of anchor sets are designed to exclusively perform the structural function of connection between the conductor and the lattice tower structures and do not allow to monitor the tension of the conductor.
  • the tension represents the main indicator of the mechanical stress to which an overhead power line is subjected and is suitable to be used to identify exceptional load conditions (snow/ice sleeve, wind, conductor breaks).
  • the technical task underlying the present invention is to propose an anchor set for overhead line conductors which overcomes the drawbacks of the prior art mentioned above.
  • the anchor set object of the present invention comprises a connecting element extending longitudinally between a first end configured to be connected to a conductor, and a second end connectable to a lattice tower by means of a bracket.
  • a pin articulately connects the bracket to the connecting element.
  • the anchor set comprises a measuring instrument configured to measure a structural load between the bracket and the connecting element.
  • said measuring instrument is integrated in the pin, while in a second embodiment the measuring instrument is arranged on the connecting element.
  • the anchor set object of the present invention solves the technical problem, as it is capable of monitoring the tension of the conductor without changing the geometry of the catenary and the pre-existing mechanical performance.
  • the anchor set allows to identify abnormal load conditions, indicators of breakage phenomena or structural anomalies.
  • the present invention advantageously allows to immediately geolocate the exact point where the damage occurred, thus avoiding long and expensive inspection operations adapted to detect the damage.
  • FIG. 1 shows a front view of a first embodiment of an anchor set for overhead line conductors according to the present invention
  • FIG. 2 shows a front view of a component of the anchor set shown in Figure 1;
  • FIG. 3 shows a front view of a component of the anchor set shown in Figure 1;
  • FIG. 4 shows a front view of a second embodiment of an anchor set for overhead line conductors according to the present invention
  • - Figure 5 shows a front view of a component of the anchor set shown in Figure 4;
  • FIG. 6 shows a front view of a component of the anchor set shown in Figure 1;
  • FIG. 7 shows a side view of a component of the anchor set shown in Figure 6;
  • FIG. 8 shows a side view of a power line according to the present invention.
  • an anchor set for overhead line conductors in particular for conveying electric power, is indicated with 1.
  • Such an anchor set 1 is configured to anchor a conductor by coupling it to a lattice tower.
  • a lattice tower typically, but not necessarily, the latter is a pylon or a tubular pole anchored to the ground.
  • the anchor set 1, object of the present invention comprises a bracket 2 configured to be connected to a lattice tower.
  • the bracket 2 has a coupling portion 20 configured to be connected to the lattice tower, and a pair of prongs 21 projecting from the coupling portion 20.
  • the prongs 21 extend parallel along a longitudinal direction X-X.
  • each hole 2b is arranged on one of the two prongs 21 and has an axis extending along a transverse direction Y-Y, perpendicular to the longitudinal direction X-X.
  • the anchor set 1 comprises a connecting element 3 extending mainly along the longitudinal direction X-X between a first end 3a connectable to the conductor insulators, and a second end 3b at least partially inserted in the seat 2a of the bracket 2.
  • the second end 3b of the connecting element 3 is interposed between the prongs 2b of the bracket 2, occupying at least part of the seat 2a.
  • the connecting element 3 has, at the second end 3b, a through hole 3c with axis extending along the transverse direction Y-Y. Such a through hole is arranged between the pair of holes 2b of the bracket 2, along the same transverse axis Y-Y.
  • the anchor set 1 further comprises a pin 4 extending along the transverse direction Y-Y.
  • the pin 4 is inserted, in operating conditions, in the through hole 3 c and in the pair of holes 2b to articulately connect the bracket 2 to the connecting element 3.
  • the pin 4 constrains the bracket 2 to rotate with respect to the connecting element 3 around the pin 4 itself.
  • the anchor set 1 comprises a measuring instrument 5 configured to measure a structural load between the bracket 2 and the connecting element 3. More precisely, the measuring instrument 5 is configured to measure the component of the structural load along the longitudinal direction X-X, which represents the tension of the conductor.
  • the tension of the conductor represents the main indicator of the mechanical stress to which the conductor is subjected.
  • the measuring instrument 5 will record abnormal load values, which will be indicators of the need for corrective intervention.
  • the measuring instrument 5 is arranged between the seat 2a of the bracket 2 and the second end 3b of the connecting element 3. It is thereby possible to avoid the replacement of the anchor set currently installed with those of the present invention involving changes in the position of the conductor, or more generally the catenary geometry.
  • the measuring instrument 5 is at least partially in contact with the connecting element 3.
  • the measuring instrument 5 is integrated inside the pin 4.
  • the pin 4 comprises a cylindrical surface 4a extending along the transverse direction Y-Y, as shown in figure 3.
  • a cylindrical surface 4a has, in the assembled configuration, at least a first portion 41a in contact with the bracket 2 and a second cylindrical portion 42a in contact with the connecting element 3. More precisely, the first and the second portion 41a, 42a are respectively in contact with the holes 2b of the bracket 2, and with the through hole 3 c of the connecting element 3.
  • the cylindrical surface 4a comprises a cavity 40a mainly extending along the transverse direction Y-Y.
  • the cavity 40a at least partially passes through the first and the second portion 41a, 42a of the cylindrical surface 4a.
  • the cylindrical surface 4a of the pin 4 comprises two first portions 41a, one for each hole 2b of the bracket 2.
  • Such two first portions 41a are arranged on opposite sides with respect to the second portion 42a, and the cavity 40a entirely passes through the second portion 42a and at least partially each of the two first portions 41a.
  • the measuring instrument 5 comprises a plate 5a inserted in the cavity 40a, and in contact with the connecting element 3 at the second portion 42a of the cylindrical surface 4a.
  • the plate 5a is welded or glued to the cavity 40a, so that any load acting on the pin 4, elastically deforming it, generates a corresponding elastic deformation of the plate 5a.
  • the measuring instrument 5 is configured to calculate the load applied on the pin 4 starting from the elastic deformation of the plate 5a.
  • the conductor is subjected to a tension which is transferred to the connecting element 3 at its first end 3 a, and then discharged onto the lattice tower by means of the pin 4 and the bracket 2.
  • the pin 4 and therefore also the plate 5a undergo small elastic deformations which allow the measuring instrument 5 to determine the tension of the conductor.
  • the connecting element 3 comprises a measuring area 3d, located between the first and the second end 3a, 3b, where the measuring instrument 5 is arranged.
  • the measuring area 3d has a flat surface 6, on which the measuring instrument 5 is arranged.
  • the flat surface 6 extends along the longitudinal direction X-X starting from an area near the second end 3 b of the connecting element 3.
  • the connecting element 3 comprises a second through hole 3e arranged inside the measuring area 3d.
  • the device 1 comprises a box-like element 7 connected to the connecting element 3 by means of the second through hole 3e.
  • the box-like element 7 has an inner compartment configured to contain the electronic components for the operation of the measuring instrument 5, such as the feeder or the analog to digital converter.
  • the through hole 3 e is of square section to prevent the rotation of the box-like element 7 connected thereto.
  • the measuring instrument 5 is located at the second through hole 3e, so that it can be easily connected to the electronic components contained in the box-like element 7.
  • the measuring instrument 5 comprises at least one strain gauge (not shown) in contact with the flat surface 6 of the connecting element 3.
  • the measuring instrument 5 is configured to calculate the tension of the structural load conductor between the bracket 2 and the connecting element 3 from the signal obtained from the at least one strain gauge.
  • the overhead power line 100 comprising a plurality of lattice towers (not depicted in Figure 8), tubular and/or pylon, for one or more electric power conductors 102, by means of one or more of the anchor sets 1 described above.
  • the conductor 102 is connected to the first end 3a of the connecting element 3 by means of an insulator 103 which prevents the electrical current, which flows in the conductor 102, from flowing into the pylon/pole.

Abstract

Anchor set (1) for anchoring overhead line conductors, in particular for electric power transmission, comprising: a bracket (2), connectable to a lattice tower, the bracket having a seat (2a) and a pair of holes (2b); a connecting element (3) extending along a longitudinal direction (X-X) between a first end (3a) connectable to a conductor, and a second end (3b) at least partially inserted in the seat (2a) of the bracket (2), the connecting element (3) having a through hole (3c) at the second end (3b); a pin (4), extending along a transverse direction (Y-Y) perpendicular to the longitudinal direction (X-X), inserted in the through hole (3c) of the connecting element (3) and in the pair of holes (2b) of the bracket (2) to articulately connect the bracket (2) to the connecting element (3); the anchor set (1) characterized in that it comprises a measuring instrument (5) configured to measure a structural load between the bracket (2) and the connecting element (3).

Description

Title: "Anchor set for anchoring overhead line conductors, particularly for electric power transmission"
DESCRIPTION
Technical Field
The present invention relates to an anchor set for anchoring overhead line conductors, a device applicable in the context of the structural fastening of a line conductor for the transmission of electric power to a lattice tower.
Background art
In an overhead power line, each conductor is suspended by means of a plurality of lattice towers spaced apart from each other. Typically, but not necessarily, such lattice towers are pylons or tubular poles extending perpendicular to the ground to which they are anchored.
The conductors are connected to the lattice tower structures by means of clamping elements which, in overhead power lines, comply with IEC EN 61284. The line clamping elements are chosen so as to be able to withstand the maximum stresses transmitted by the conductors to the lattice tower. Depending on the intended use, different breaking loads are identified for the clamping elements composing the suspended equipment. Anchor clamps are instead sized based on the breaking load of the conductor.
Anchor set is intended as the assembly of the clamping elements which connect the suspension or anchor clamps to the insulators and the latter to the lattice tower. The choice of anchor sets is made, for each individual lattice tower, among those available, according to the loads (transverse, vertical and longitudinal) determined by the tension of the conductors and the features of use of the lattice tower in question (average range, upstream and downstream height difference, and deviation angle).
The known anchor sets comprise a button eyelet fitting having a first end connectable to the conductor and a second end connectable to the lattice tower. Typically, the first end is connected to the conductor by means of a chain of insulators which ensure the dielectric seal between the conductor and the lattice tower, while the second end is connected to the lattice tower by means of a C-shaped bracket.
Moreover, the known anchor sets further comprise a pin configured to articulately connect the bracket to the button eyelet fitting. In detail, the pin is housed in a through hole at the second end of the button eyelet fitting and is inserted in a special pair of holes of the bracket.
Problems of the Prior Art
The known type of anchor sets are designed to exclusively perform the structural function of connection between the conductor and the lattice tower structures and do not allow to monitor the tension of the conductor. Specifically, the tension represents the main indicator of the mechanical stress to which an overhead power line is subjected and is suitable to be used to identify exceptional load conditions (snow/ice sleeve, wind, conductor breaks).
Auxiliary devices capable of monitoring the tension of the conductor exist, however their introduction on existing power lines alters the size of the anchor set, and in particular the length, which involves variations in the sag and tension in the daily operating conditions. Therefore, to install these known type of monitoring devices, it is necessary to intervene on the conductors with invasive interventions such as cutting, making new clamps and joints: these interventions are expensive and can affect the reliability of the infrastructure. Object of the invention
In this context, the technical task underlying the present invention is to propose an anchor set for overhead line conductors which overcomes the drawbacks of the prior art mentioned above.
In particular, it is an object of the present invention to provide an anchor set for overhead line conductors which allows to monitor the tension of the conductor without modifying the geometry of the catenary and the pre-existing mechanical performance.
Furthermore, it is an object of the present invention to reduce the repair costs of the infrastructure for the transmission of energy, in particular the portion linked to the identification of the damaged conductor portion.
Finally, it is an object of the present invention to maintain full compatibility with the known clamping and the possibility of replacing the existing components one by one, so as not to generate alterations in the size of the anchor set (and in particular in the length), variations in the sag and the tension of the conductor in daily conditions.
SUMMARY OF THE INVENTION
The technical task mentioned and the objects stated are substantially achieved by an anchor set for overhead line conductors comprising the technical features set out in one or more of the appended claims.
In particular, the anchor set object of the present invention comprises a connecting element extending longitudinally between a first end configured to be connected to a conductor, and a second end connectable to a lattice tower by means of a bracket. A pin articulately connects the bracket to the connecting element.
The anchor set comprises a measuring instrument configured to measure a structural load between the bracket and the connecting element.
In accordance with a first embodiment, said measuring instrument is integrated in the pin, while in a second embodiment the measuring instrument is arranged on the connecting element.
The anchor set object of the present invention solves the technical problem, as it is capable of monitoring the tension of the conductor without changing the geometry of the catenary and the pre-existing mechanical performance.
Advantageously, therefore, the anchor set allows to identify abnormal load conditions, indicators of breakage phenomena or structural anomalies.
Furthermore, if installed in multiple points of the power grid, the present invention advantageously allows to immediately geolocate the exact point where the damage occurred, thus avoiding long and expensive inspection operations adapted to detect the damage.
LIST OF FIGURES
Further features and advantages of the present invention will become more apparent from the description of an exemplary, but not exclusive, and therefore non-limiting preferred embodiment of an anchor set for overhead line conductors as illustrated in the appended drawings, in which:
- Figure 1 shows a front view of a first embodiment of an anchor set for overhead line conductors according to the present invention;
- Figure 2 shows a front view of a component of the anchor set shown in Figure 1;
- Figure 3 shows a front view of a component of the anchor set shown in Figure 1;
- Figure 4 shows a front view of a second embodiment of an anchor set for overhead line conductors according to the present invention; - Figure 5 shows a front view of a component of the anchor set shown in Figure 4;
- Figure 6 shows a front view of a component of the anchor set shown in Figure 1;
- Figure 7 shows a side view of a component of the anchor set shown in Figure 6;
- Figure 8 shows a side view of a power line according to the present invention.
DETAILED DESCRIPTION
Even if not explicitly highlighted, the individual features described with reference to the specific embodiments shall be understood as accessory and/or interchangeable with other features, described with reference to other embodiments.
With reference to the appended drawings, as a whole, an anchor set for overhead line conductors, in particular for conveying electric power, is indicated with 1.
Such an anchor set 1 is configured to anchor a conductor by coupling it to a lattice tower. Typically, but not necessarily, the latter is a pylon or a tubular pole anchored to the ground.
The conductor and the lattice tower will not be further described as they are not part of the invention and are known to those skilled in the art.
The anchor set 1, object of the present invention, comprises a bracket 2 configured to be connected to a lattice tower.
In detail, with reference to figures 5 and 6, the bracket 2 has a coupling portion 20 configured to be connected to the lattice tower, and a pair of prongs 21 projecting from the coupling portion 20. Preferably, the prongs 21 extend parallel along a longitudinal direction X-X.
Furthermore, the bracket 2 has a pair of holes 2b, and a seat 2a delimited by the coupling portion 20 and from the pair of prongs 21. Preferably, each hole 2b is arranged on one of the two prongs 21 and has an axis extending along a transverse direction Y-Y, perpendicular to the longitudinal direction X-X.
As shown in figures 1 and 4, the anchor set 1 comprises a connecting element 3 extending mainly along the longitudinal direction X-X between a first end 3a connectable to the conductor insulators, and a second end 3b at least partially inserted in the seat 2a of the bracket 2. In greater detail, the second end 3b of the connecting element 3 is interposed between the prongs 2b of the bracket 2, occupying at least part of the seat 2a.
The connecting element 3 has, at the second end 3b, a through hole 3c with axis extending along the transverse direction Y-Y. Such a through hole is arranged between the pair of holes 2b of the bracket 2, along the same transverse axis Y-Y.
The anchor set 1 further comprises a pin 4 extending along the transverse direction Y-Y. The pin 4 is inserted, in operating conditions, in the through hole 3 c and in the pair of holes 2b to articulately connect the bracket 2 to the connecting element 3. In other words, the pin 4 constrains the bracket 2 to rotate with respect to the connecting element 3 around the pin 4 itself.
With particular reference to figures 1 and 5, the anchor set 1 comprises a measuring instrument 5 configured to measure a structural load between the bracket 2 and the connecting element 3. More precisely, the measuring instrument 5 is configured to measure the component of the structural load along the longitudinal direction X-X, which represents the tension of the conductor.
The tension of the conductor represents the main indicator of the mechanical stress to which the conductor is subjected. In the event of structural failures, abnormal environmental conditions or in the event of damage to the conductor, the measuring instrument 5 will record abnormal load values, which will be indicators of the need for corrective intervention.
Preferably, the measuring instrument 5 is arranged between the seat 2a of the bracket 2 and the second end 3b of the connecting element 3. It is thereby possible to avoid the replacement of the anchor set currently installed with those of the present invention involving changes in the position of the conductor, or more generally the catenary geometry.
Furthermore, preferably the measuring instrument 5 is at least partially in contact with the connecting element 3.
FIRST EXAMPLE EMBODIMENT
In a first embodiment depicted in figures 1 to 3, the measuring instrument 5 is integrated inside the pin 4.
The pin 4 comprises a cylindrical surface 4a extending along the transverse direction Y-Y, as shown in figure 3. Such a cylindrical surface 4a has, in the assembled configuration, at least a first portion 41a in contact with the bracket 2 and a second cylindrical portion 42a in contact with the connecting element 3. More precisely, the first and the second portion 41a, 42a are respectively in contact with the holes 2b of the bracket 2, and with the through hole 3 c of the connecting element 3.
In the first embodiment, the cylindrical surface 4a comprises a cavity 40a mainly extending along the transverse direction Y-Y. The cavity 40a at least partially passes through the first and the second portion 41a, 42a of the cylindrical surface 4a.
Preferably, the cylindrical surface 4a of the pin 4 comprises two first portions 41a, one for each hole 2b of the bracket 2. Such two first portions 41a are arranged on opposite sides with respect to the second portion 42a, and the cavity 40a entirely passes through the second portion 42a and at least partially each of the two first portions 41a.
In the first embodiment, the measuring instrument 5 comprises a plate 5a inserted in the cavity 40a, and in contact with the connecting element 3 at the second portion 42a of the cylindrical surface 4a.
The plate 5a is welded or glued to the cavity 40a, so that any load acting on the pin 4, elastically deforming it, generates a corresponding elastic deformation of the plate 5a. The measuring instrument 5 is configured to calculate the load applied on the pin 4 starting from the elastic deformation of the plate 5a.
During operation, the conductor is subjected to a tension which is transferred to the connecting element 3 at its first end 3 a, and then discharged onto the lattice tower by means of the pin 4 and the bracket 2. As a result of the tension, the pin 4 and therefore also the plate 5a undergo small elastic deformations which allow the measuring instrument 5 to determine the tension of the conductor.
SECOND EXAMPLE EMBODIMENT
In a second embodiment shown in figures 4 and 5, the connecting element 3 comprises a measuring area 3d, located between the first and the second end 3a, 3b, where the measuring instrument 5 is arranged.
As shown in figure 5, the measuring area 3d has a flat surface 6, on which the measuring instrument 5 is arranged. Preferably, the flat surface 6 extends along the longitudinal direction X-X starting from an area near the second end 3 b of the connecting element 3.
In the second embodiment, the connecting element 3 comprises a second through hole 3e arranged inside the measuring area 3d.
With particular reference to figure 4, the device 1 comprises a box-like element 7 connected to the connecting element 3 by means of the second through hole 3e.
The box-like element 7 has an inner compartment configured to contain the electronic components for the operation of the measuring instrument 5, such as the feeder or the analog to digital converter.
Preferably, the through hole 3 e is of square section to prevent the rotation of the box-like element 7 connected thereto.
Preferably, the measuring instrument 5 is located at the second through hole 3e, so that it can be easily connected to the electronic components contained in the box-like element 7.
In the second embodiment, the measuring instrument 5 comprises at least one strain gauge (not shown) in contact with the flat surface 6 of the connecting element 3. The measuring instrument 5 is configured to calculate the tension of the structural load conductor between the bracket 2 and the connecting element 3 from the signal obtained from the at least one strain gauge.
POWERLINE
It is a further object of the present invention the overhead power line 100 comprising a plurality of lattice towers (not depicted in Figure 8), tubular and/or pylon, for one or more electric power conductors 102, by means of one or more of the anchor sets 1 described above. The conductor 102 is connected to the first end 3a of the connecting element 3 by means of an insulator 103 which prevents the electrical current, which flows in the conductor 102, from flowing into the pylon/pole.
By virtue of the measuring instruments 5 integrated in the anchor set 1, in the event of damage, it is immediately possible to identify the exact point and intervene, thus avoiding long and expensive inspection operations aimed at identifying the point where the damage occurred.

Claims

1. Anchor set (1) for anchoring overhead line conductors to a lattice tower, particularly for electric power transmission, said anchor set comprising:
- a bracket (2) connectable to a lattice tower, the bracket (2) having a seat (2a) and a pair of holes (2b);
- a connecting element (3) extending mainly along a longitudinal direction (X-X) between a first end (3a) connectable to a conductor, and a second end (3b) at least partially inserted in the seat (2a) of the bracket (2), said connecting element (3) having a through hole (3c) at the second end (3b);
- a pin (4) extending along a transverse direction (Y-Y) perpendicular to the longitudinal direction (X-X), the pin (4) being inserted in the through hole (3 c) of the connecting element (3) and in the pair of holes (2b) of the bracket (2) to articulately connect the bracket (2) to the connecting element (3); characterized in that it comprises a measuring instrument (5) configured to measure a structural load between the bracket (2) and the connecting element (3).
2. Anchor set (1) according to claim 1, wherein the measuring instrument (5) is arranged between the seat (2a) of the bracket (2) and the second end (3b) of the connecting element (3), the measuring instrument (5) being at least partially in contact with the connecting element (3).
3. Anchor set (1) according to any one of the preceding claims, wherein the measuring instrument (5) is integrated in the pin (4).
4. Anchor set (1) according to any one of the preceding claims, wherein:
- the pin (4) comprises a cylindrical surface (4a) extending along the transverse direction (Y-Y), the cylindrical surface (4a) having at least a first portion (41a) in contact with the bracket (2) and a second portion (42a) in contact with the connecting element (3);
- the cylindrical surface (4a) comprises a cavity (40a) extending mainly along the transverse direction (Y-Y), the cavity (40a) extending at least partially along the first and the second portion (41 a, 42a) of the cylindrical surface (4a).
5. Anchor set (1) according to claim 4, wherein:
- the cylindrical surface (4a) comprises two first portions (41a) arranged on opposite side of the second portion (42a);
- the cavity (40a) entirely crosses the second portion (42a) and at least partially crosses each of the first two portions (41a).
6. Anchor set (1) according to claim 1 or 2, characterized in that the connecting element (3) comprises a measuring area (3d) arranged between the first and the second end (3a, 3b), the measuring instrument (5) being arranged at said measuring area (3d).
7. Anchor set (1) according to claim 6, characterized in that the measuring area (3d) of the connecting element (3) has a flat surface (6), the measuring instrument (3d) being arranged on said flat surface (6).
8. Anchor set (1) according to claim 6 or 7, wherein:
- the connecting element (3) comprises a second through hole (3e), preferably of square section, arranged inside the measuring area (3d);
- the measuring instrument (5) is arranged at said second hole (3e).
9. Anchor set (1) according to any one of claims 6 to 8, characterized in that the measuring instrument (5) is a strain gauge.
10. Overhead power line (100) for the transmission of electrical energy comprising at least one lattice tower, a conductor (102) configured to transport electric current and at least one piece of anchor set (1) according to any one of the preceding claims, configured to anchor the conductor (102) to the lattice tower, wherein the bracket (2) is connected to the lattice tower and the connecting element (3) is connected to the conductor (102).
EP21839255.3A 2020-12-10 2021-12-10 Anchor set for anchoring overhead line conductors, particularly for electric power transmission Pending EP4260423A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000030293A IT202000030293A1 (en) 2020-12-10 2020-12-10 EQUIPMENT BY AMARRO FOR AIRLINE CONDUCTORS IN PARTICULAR FOR THE TRANSMISSION OF ELECTRICITY
PCT/IB2021/061558 WO2022123509A1 (en) 2020-12-10 2021-12-10 Anchor set for anchoring overhead line conductors, particularly for electric power transmission

Publications (1)

Publication Number Publication Date
EP4260423A1 true EP4260423A1 (en) 2023-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21839255.3A Pending EP4260423A1 (en) 2020-12-10 2021-12-10 Anchor set for anchoring overhead line conductors, particularly for electric power transmission

Country Status (3)

Country Link
EP (1) EP4260423A1 (en)
IT (1) IT202000030293A1 (en)
WO (1) WO2022123509A1 (en)

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FR3138234A1 (en) * 2022-07-20 2024-01-26 Sediver Insulator for overhead power lines with a mechanical load detection device

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JPS6111624A (en) * 1984-06-27 1986-01-20 Fujikura Ltd Tension sensor of power transmission line
JPH06323369A (en) * 1993-05-11 1994-11-25 Yaskawa Electric Corp Tension adjusting device
CN201323421Y (en) * 2008-12-22 2009-10-07 广州长川科技有限公司 Electric hardware tool with function of tension detection
KR20140030545A (en) * 2012-08-31 2014-03-12 한국전력공사 Apparatus for controlling tension of transmission lines

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