266results about "Arrangements for reliveing mechanical tension" patented technology

This invention relates to an aluminum conductor composite core reinforced cable (ACCC) and method of manufacture. An ACCC cable has a composite core surrounded by at least one layer of aluminum conductor. The composite core comprises a plurality of fibers from at least one fiber type in one or more matrix materials. The composite core can have a maximum operating temperature capability above 100° C. or within the range of about -45° C. to about 230° C., at least 50% fiber to resin volume fraction, a tensile strength in the range of about 160 Ksi to about 370 Ksi, a modulus of elasticity in the range of about 7 Msi to about 37 Msi and a coefficient of thermal expansion in the range of about -0.7x10<-6 >m/m/° C. to about 6x10<-6 >m/m° C. According to the invention, a B-stage forming process may be used to form the composite core at improved speeds over pultrusion processes wherein the speeds ranges from about 9 ft/min to about 60 ft/min.

A composite core for an electrical cable, the composite core defining a longitudinal axis that defines a center of the composite core, the core comprising a plurality of longitudinally extending reinforcing fibers embedded in a resin matrix, the fibers oriented substantially parallel to the longitudinal axis and a sheath surrounding the plurality of longitudinally oriented fibers. The sheath may further comprise a plurality of off-axis reinforcing fibers oriented at an angle relative to the longitudinal axis surrounding the longitudinally extending fibers. The sheath may comprise a type of resin, including for example, thermosetting resin or thermoplastic resin.

This invention relates to collet-type splices and collet-type dead ends and methods for splicing together two aluminum conductor composite core reinforced cables (ACCC) or terminating one ACCC cable. The collet-type fittings use a collet inside a collet housing to hold the composite cores. The composite cores can be stripped of the aluminum conductor to provide a bond between the collet and the composite core. After inserting the composite core into the collet, a compression implement compresses the collet. The collet holds the composite core with frictional forces and the collet further compresses and strengthens the hold on the composite core if the composite core pulls the collet further into the collet housing.

Systems and methods for determining an effective wind speed are disclosed. A system includes a first detector, a second detector and a processing unit. The first detector includes a heated temperature-sensing element having a heater and a first temperature sensor, and a first housing at least partially housing the heated temperature-sensing element. The second detector includes a non-heated temperature-sensing element having a second temperature sensor, a second housing at least partially housing the non-heated temperature-sensing element. The processing unit can be adapted to determine the effective wind speed according to a temperature at the heated temperature-sensing element, a temperature at the non-heated temperature-sensing element, and/or a difference between these temperatures and in accordance with an algorithm or table of values. The heated and non-heated temperature-sensing elements and their respective first housing and second housing are collinear, proximal and parallel to the conductor, and protected from precipitation by a shield.

A method for increasing the current carried between two high voltage conductor support powers is provided. The method includes removing a first high voltage carrying cable mounted between the towers and replacing it a composite core cable.

The present invention is related to a method for detecting and/or measuring atmospheric accretion on a suspended electrical cable span (2) of overhead power lines, said suspended electrical cable span (2) having a sag (D) and a local tension (H), and being submitted to wind pressure (w_wind), comprising the steps of independently:

• • measuring said sag (D), and optionally measuring the wind pressure (w_wind), over a first time range,
  • measuring the local tension (H) over a second time range,

the results of both steps being complemented and/or combined, so that to allow atmospheric accretion detection and/or measurement.

A method is provided for controlling the sagging of a power transmission cable hang between two towers. The cable has a first supporting portion and a second conductive portion. The method includes a first act of mounting the cable between the two towers, such that when mounted between the towers the cable has a cable load. The method further includes a second act of stretching the first portion to have a cable sag less than a desired sag, a third act of releasing at least some of the tension to obtain the desired sag, and a fourth act calculating a load magnitude carried by the first portion. If the load magnitude is less than a desired load magnitude the method includes repeating the second, third and fourth acts until the load magnitude is at the desired level.

A method of installing a fibre optic cable (10) upon an overhead power line structure, the overhead power line structure including an overhead power line support (60)and an overhead power line (90) carried by the overhead power line support (60), the method comprising the steps of passing an end of the fibre optic cable (10) through a bore formed in an insulator (120); positioning the insulator (120) at an installation location adjacent to the overhead power line support (60) with the fibre optic cable (10) located within the bore in the insulator (120); bonding the insulator (120) in place once positioned in the said installation location; connecting the insulator (120) to a first end of a conductive carrier (160); and connecting a second end of the conductive carrier (160) to the overhead power line (90) such that the fibre optic cable (10) is supported by the conductive carrier (160) and the insulator (120) as it passes from a first side of the overhead power line support (60) to a second side thereof.

A quick release connector for tensioned power lines, the connector comprising: a first component, said first component attached to a power line segment; and a second component attached to a second generally collinear power line segment, said second component comprising a locking clamp mechanism that selectively clamps the first component and automatically releases upon the application of a longitudinal force of predetermined magnitude along the clamp.

An overhead transmission line support structure includes a base segment and a main segment extending upwardly from the base segment. The overhead transmission line structure further includes a hinge operatively connecting the base segment with the main segment such that the hinge provides deflection capacity parallel to overhead transmission lines supported by the overhead transmission line support structure and such that with sufficient longitudinal loading on the overhead transmission line support structure, the main segment rotates about the hinge. The overhead transmission line support structure may include a post-tensioning system extending along the main segment and/or at least one fuse plate operatively connected between the base segment and the main segment and configured to deform upon the sufficient longitudinal loading on the overhead transmission line support structure.

The invention discloses a sliding fitting for electric equipment. The sliding fitting comprises a bracket for connecting a pipe bus and a connecting plate for connecting electric equipment; landing legs are arranged at the lower end of the bracket, a supporting shaft is arranged in each landing leg, and the supporting shaft penetrates a supporting plate; the supporting plate is fixed on the connecting plate, a sliding slot is formed in the supporting plate, and the supporting shaft penetrates in the sliding slot and capable of sliding along the sliding slot, wherein the sliding slot is a circular arc. The sliding fitting can well displace and slide under the seismic effect so as to balance the height difference caused by equipment deformation in a loop system, thereby reducing the bad influence on the electric equipment by the seismic effect; the structure system of the electric equipment is protected, the safety running of a power grid system is maintained, and the anti-seismic property of the electric equipment is improved.

The invention discloses a power conveying device with adjustable support directions and angles. The power conveying device comprises a support column, wherein a rotating disc is fixed on the support column; a bearing plate is rotationally connected with the upper end of the support column; a fixing device is arranged at the lower end of the bearing plate; two first chutes parallel to each other are formed in the upper end of the bearing plate; two first sliding blocks are respectively mounted in the two first chutes; a first moving plate is fixed at the upper ends of the four first sliding blocks; four first insert rods are arranged at the upper end of the first moving plate in a penetration manner; and a plurality of first insert holes corresponding to the first insert rods are distributed in the bottom ends inside the first chutes. The power conveying device is advanced in design, convenient to use, wide in application range, good in economic benefit and applicable to popularization;different variation positions and angles of a power wire are achieved; meanwhile, due to adoption of a plurality of damping buffer devices and protection devices, the problem that a conventional lineis inconvenient to fix, mount and use is solved; and the construction progress can be accelerated.

The invention discloses a 10KV distribution line cable erection fixture and an application method and provides a convenient and fast device capable of effectively avoiding adverse impact caused by wind vibration. The 10KV distribution line cable erection fixture comprises a shell, wherein a main cavity is formed at the middle of the shell, and two assistant cavities are formed on the two sides; three rope sheaves and a pair of assistant locking mechanisms are mounted in the main cavity; the three rope sheaves are arranged in a shape of Chinese character 'Pin'; the rope sheaves are close to an entrance, and the locking mechanism is close to an exit. When a cable passes by, a clamping force is formed against the cable under the effect of reversed tension of the cable; a pull rod is mounted in each assistant cavity, and the tensioning effect is good; and three rope sheaves are arranged inside, the cable is wound on the three rope sheaves which are mutually bent in a roundabout manner, and locking and fixing are formed in the roundabout bending process to firmly lock the cable inside and form a relatively good locking effect.

This invention relates to collet-type fittings(201) for use in collet-type splices and collet-type dead ends and methods for splicing together two aluminum conductor composite core reinforced cables(ACCC) or terminating one ACCC cable. The collet-type fittings(201) comprise a collet(202) coincident with a collet housing(204) to hold the composite cores. The composite cores can be stripped of the aluminum conductor to provide a bond between the collet(202) and the composite core. After inserting the composite core into the collet(202), a compression element(206) compresses the collet(202). The collet(202) holds the composite core with frictional forces and the collet(202) further compresses and strengthens the hold on the composite core if the composite core pulls the collet(202) further into the collet housing(204).

The invention discloses a protection device for preventing a cable from being excessively tensioned, which relates to the technical field of power transmission cables. The device comprises a cable, acable sliding device, a cable breaking and closing device and a wire tower, wherein one end of the cable is provided with a cable joint and a plurality of fixed joints; the plurality of fixed joints are fixed on the peripheral side surface of the cable joint; the length of the cable joint is greater than that of the fixed joint; a guide block is fixed on the other end surface of the cable connecting seat; a double-sided jack line board is fixedly mounted at the top end of the wire tower; cable joints are inserted into opposite surfaces of the double-sided jack line board; and the cable joint penetrates through a cable storage groove. Through the effects of the cable, the cable sliding device and the cable breaking and closing device, the problems that the cable is broken due to too large tensioning force in extreme weather, personnel are prone to being hurt in the cable throwing process due to breaking of the cable, and even the serious consequence of collapse of the tower is caused are solved.

The invention discloses a wire abandoning and pole protecting device for a transmission and distribution line. The wire abandoning and pole protecting device comprises a long-strip-shaped metal shell, a first wire installation channel is arranged on one side of the metal shell, a notch is formed in the middle of the metal shell, the notch divides the first wire installation channel into a first wire channel and a second wire channel, a first wire can be embedded in the first wire channel, a second wire can be embedded in the second wire channel, the first wire channel and the second wire channel achieve mechanical clamping on the corresponding wires, and the first wire and the second wire are not fixedly connected and are in electric connection through the metal shell. During normal operation, the wire abandoning and pole protecting device for the transmission and distribution line should not glide relative to the wires, and mechanical performance and electrical performance of an original line are not influenced at all. When applied force of external force on a distribution network line exceeds a set action value, the first wire and the second wire can be completed released, the applied force of the wires to the pole is released, and it is ensured that the external force is not continuously exerted on the pole any more.