Patent Application
20230034013
The present invention relates generally to tools for the removal of transmission and distribution line wedge connectors, and methods of using the same. More particularly, the present invention provides a device operable to couple to a wedge connector and dislodge a wedge from a wedge connector sleeve, thereby providing access for replacement or repair of a wedge connector.
Transmission and distribution lines are a critical component of the electrical power transmission infrastructure. Transmission lines to transport and distribute electrical power over great distances to consumers from many utility providers. A transmission line may be tapped into with a wedge tap connector. A wedge connector has two components a wedge connector sleeve (e.g., “C” member, sleeve) and a wedge that connects a first conductor cable (e.g., main, run, etc.) to a second conductor cable (e.g., tap). An electrical connection is formed by inserting the wedge between the two conductor cables with sufficient force to cause plastic deformation of the sleeve, thereby applying pressure to the cables and wedge. To secure the wedge a charged impact tool (e.g., AMPACT) is used, which drives the wedge into the sleeve. An assembled wedge connector may provide a holding pull-out force of the order of 1200 lbs. and may subject the wedge sleeve to pressures of up to 250 MPa.
The removal process for the assembled wedge is a similar operation, with the impact tool being used to drive the wedge out of the wedge connector. This method of removing the wedge from the sleeve provides ongoing concern with the laborious process using the impact tool, which requires significant manual manipulation of the impact tool and the assembled wedge at dangerous, elevated positions for the lineman. The precarious position and the need for manual manipulation of the wedge and tool creates a hindrance for a lineman to retrieve the additional tools required to secure and utilize the conventional impact tool. Thus, an improved and more efficient transmission line tap connector removal tool is needed.
The present invention provides an improved transmission and distribution line wedge connector removal tool and methods of using such a tool. A wedge connector is operable to couple a transmission line set, where the transmission or distribution line set includes a first conductor cable (e.g., main) and a second conductor cable (e.g., tap). A wedge connector consists of a metal wedge located between the main and tap cable situated at opposite ends of a C-shaped metal component that hereinafter is simply referred to as a “sleeve” or “wedge sleeve.” The sleeve provides a cavity for receiving the wedge. An electrical connection is formed by inserting the wedge between the two conductor cables with sufficient force to cause plastic deformation of the sleeve, thereby applying pressure to the cables and wedge. Because the wedge connector operates by applying pressure to the cables and sleeve, the wedge and sleeve geometries are complementary, and both have similar geometric constraints. The wedge and sleeve have a substantially tapering geometry that is A-symmetric, where a top surface of both the wedge and sleeve has a larger cross-sectional area than a bottom surface's cross-sectional area. Therebetween the top and bottom surfaces, the cross-section gradually reduces from the top surface to the bottom surface. The thicknesses of the sleeve and wedge may vary depending on manufactures or materials used for construction. The wedge in some embodiments may provide two channels having a substantially constant circular geometry that aligns the transmission or distribution line cables such that the pressure distributes proportionally on the sleeve and cables.
The wedge connector removal tool of the present invention decouples the wedge from the sleeve and cables, allowing for repair or replacement of either the transmission or distribution lines or the wedge connector. The wedge connector removal tool of the present invention includes an elongated arm having a front surface, a rear surface, a proximal end, a distal end, and a line of symmetry. On the elongated arms distal end, an attachment member may extend perpendicularly out from the elongated arm to a pre-determined distance, and a threaded nut may be secured to the proximal end on the front surface. The attachment member may have at least one protrusion (e.g., a hook, bar, or other protruding structure) extending perpendicular from the front surface of the elongated arm. The attachment member may be operable to engage with the wedge sleeve's top surface. The elongated arm aligns centrally with the opening provided by the C-shape of the sleeve and positions the threaded nut in alignment with the centroid of the wedge. With the tool in position, a technician may advance a drive bolt through the threaded nut to interface with the wedge to dislodge and remove it from the C-shaped wedge sleeve. A technician may continue to advance the nut, and the force is distributed along the elongated arms surfaces. In some embodiments on the elongated arms rear surface, a gusset or brace may be aligned with the centerline and provides support operable to absorb the shear force of the tension on the elongated arm created by the advancement of the drive bolt.
In one aspect, the present invention provides a device for removing a wedge connector comprising a wedge and a wedge connector sleeve from a transmission or distribution line set, the device comprising: an elongated arm with a front surface, a rear surface, a central axis, a distal end having an attachment member, and a threaded nut fixedly secured to a proximal end, at least one protrusion (e.g., a hook, bar, or other protrusion) thereon the attachment member may operable to interface with an exterior surface of the wedge connector sleeve, and a drive bolt operable to translate through the threaded nut and interface with a surface of the wedge, where the advancement of the drive bolt displaces the wedge. At least one protrusion may be two protrusion s, a first and second protrusion symmetrically positioned about the central axis and extends out perpendicularly from the front surface of the attachment member. The first protrusion and second protrusion may have a distance of about 3 inches to 4½ inches apart. The sleeve may have a top surface, a bottom surface and maintains a C-shaped cross-section that provides a cavity operable to receive the wedge. The wedge may include a top surface, a bottom surface and may have two lateral channels and a cross-sectional geometry complementary to the cavity of the sleeve. The sleeve and wedge compress two electrical transmission or distribution lines. The first protrusion and second protrusion may interface with a top surface of the sleeve may be operable to anchor the attachment member to said wedge connector. The elongated arm may be positioned between an opening of the sleeves C-shape. The drive bolt may be positioned under the wedge, and the threaded end may interface with the wedge's bottom surface. The drive bolt may be further operable to dislodges the wedge from the wedge sleeve when advanced through the threaded nut. The elongated arm may have a length from the bottom surface of the threaded nut to the distal end of the attachment arm, where the length may have a range of about 3½ inches to 5 inches. The elongated arm may have a width ranging from about 1 inch to 2½ inches. The at least one protrusion may have a substantially square geometry, substantially curved, or may be complementary to the top surface of the sleeve. The protrusion may have a length ranging from about ¾ inch to 1½ inch. The elongated arm may have a spine operable to absorb a force from the drive bolt. The elongated arm, attachment member, and protrusions may have a material thickness ranging from ⅛ inch to ⅜ inch.
It is another aspect the present invention provides a method for removing a wedge from a wedge sleeve, thereby uncoupling a wedge connector from a first conductor and second conductor of a transmission or distribution line set, the method comprising mounting a wedge connector removal tool, anchoring an attachment member to one surface of the wedge sleeve thereby supporting the removal tool, and positioning a threaded nut under the wedge in a location opposite to the one surface of the wedge sleeve, and driving a drive bolt through the nut thereby applying a force operable to dislodge the wedge from the transmission or distribution lines and the wedge sleeve; wherein the attachment member may be attached to an elongated arm on a distal end, and a threaded nut may be attached to the elongated arm on a proximal end, wherein the elongated arm has a front surface, a rear surface, and a central axis. The driving of the drive bolt may be advanced with a driving mechanism. The central axis may define a plane of symmetry for the wedge connector removal tool. The attachment member may be provided in the form of an open-ended bracket having at least one protrusion with a position orthogonal to the front surface of the elongated arm. The attachment member and the elongated arm may form a T-shape and position the protrusion perpendicular to the front surface's elongated arms. The threaded nut may have a position centered with the central axis. The one surface of said wedge sleeve may be a top surface having a large cross-section and may further include a second bottom surface having a smaller cross-section, wherein the cross-section may have a substantially C-shape. The cross-section may be substantially C-shape and tapers from the top surface to the bottom surface and provides an opening for the elongated arm to nest therein. The wedge may further have a tapering cross-sectional geometry complementary to the wedge sleeve, and may provide a channel on each periphery of the wedge for securing the transmission or distribution line set conductors. The force may be applied to the bottom surface of the wedge and translate the wedge out of the sleeve. The force may be applied as a pressure ranging from 115 MPa to 200 MPa. The elongated arm may have a fixed length in a range from about 4 inches to about 6 inches. The elongated arm may have a uniform width in a range from about ¾ inch to about 1½ inch. The attachment arm may have a width of in a range of about ¾ inch to about 1½ inch. The protrusions may have a fixed length of in a range of about ⅘ inch to 1½ inch. The protrusions may have a substantially square geometry. The protrusions may have a substantially curved geometry. The drive bolt may have a length ranging from about 2 inches to about 4 inches. The drive bolt may be coupled to a ratcheting mechanism operable to advance said drive bolt.
Further aspects and embodiments will be apparent to those having skill in the art from the description and disclosure provided herein.
It is an object of the present invention to provide a removal tool that is operable to remove a wedge connector from transmission or distribution lines.
It is an object of the present invention to provide a method for coupling a wedge connector removal tool that is operable to remove a wedge from a wedge connector for replacement or repair of transmission or distribution lines or wedge connector.
It is an object of the present invention to provide a wedge connector removal tool that couples to a wedge connector without restraining a lineman's hands.
It is an object of the present invention to provide a wedge connector removal tool that does not require a powder cartridge for dislodging a wedge from a wedge connector.
The above-described objects, advantages and features of the invention, together with the organization and manner of operation thereof, will become apparent from the following detailed description when taken in conjunction with the accompanying drawings, wherein like elements have like numerals throughout the several drawings described herein. Further benefits and other advantages of the present invention will become readily apparent from the detailed description of the preferred embodiments.
Reference will now be made in detail to certain embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in reference to these embodiments, it will be understood that they are not intended to limit the invention. To the contrary, the invention is intended to cover alternatives, modifications, and equivalents that are included within the spirit and scope of the invention. In the following disclosure, specific details are given to provide a thorough understanding of the invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without all of the specific details provided.
The present invention concerns a wedge connector removal tool that may dislodge a wedge from a wedge sleeve, thereby releasing the transmission or distribution line sets for replacement or repair of a wedge connector or transmission or distribution line cables.
The elongated arm 1100 may have a length 1120, shown in
An exemplary wedge connector 2000 is illustrated in
The present invention provides a method for removing a wedge connector 2000 from a transmission or distribution line set 3000. The transmission or distribution line set may include a first conductor line 3100, and a second conductor line 3200.
The drive bolt 1400 may be advanced with a wrench, ratchet, impact driver, or impact wrench. In some embodiments, the elongated arm 1100 may have a longer length than the span of the wedge connector's 2000 top and bottom surfaces. In such embodiments, the selected drive bolt 1400 may have a length equal to the length of the elongated arm 1200.
In other embodiments, the drive bolt 1400 and nut 1300 may be replaced with a linear actuator such as a linear solenoid or pneumatic actuator. In yet other embodiments, the drive bolt 1400, nut 1300, and advancement tools may be replaced with an integrated drive mechanism, as illustrated in
The present invention provides an improved wedge connector removal tool and method of using such a tool that is operable to dislodge a wedge from a transmission or distribution line connection without using a powder cartridge. The present wedge removal tool is able to couple to a wedge connector around the transmission or distribution lines such that a lineman's hands are unrestrained to supporting the tool. It is to be understood that variations, modifications, and permutations of embodiments of the present invention, and uses thereof, may be made without departing from the scope of the invention. It is also to be understood that the present invention is not limited by the specific embodiments, descriptions, or illustrations or combinations of either components or steps disclosed herein. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. Although reference has been made to the accompanying figures, it is to be appreciated that these figures are exemplary and are not meant to limit the scope of the invention. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.
