WO2019219827A1 - Valve and grounding assembly for telecommunications closures - Google Patents

Valve and grounding assembly for telecommunications closures Download PDF

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Publication number
WO2019219827A1
WO2019219827A1 PCT/EP2019/062648 EP2019062648W WO2019219827A1 WO 2019219827 A1 WO2019219827 A1 WO 2019219827A1 EP 2019062648 W EP2019062648 W EP 2019062648W WO 2019219827 A1 WO2019219827 A1 WO 2019219827A1
Authority
WO
WIPO (PCT)
Prior art keywords
grounding
valve
stud
radial surface
assembly
Prior art date
Application number
PCT/EP2019/062648
Other languages
French (fr)
Inventor
Johan Geens
Kristof Vastmans
El Moïz Mohammed Michel GHAMMAM
Original Assignee
CommScope Connectivity Belgium BVBA
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 CommScope Connectivity Belgium BVBA filed Critical CommScope Connectivity Belgium BVBA
Publication of WO2019219827A1 publication Critical patent/WO2019219827A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G02B6/4442—Cap coupling boxes
    • 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
    • H02G15/00—Cable fittings
    • H02G15/013—Sealing means for cable inlets
    • 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
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/115—Boxes split perpendicularly to main cable direction

Definitions

  • the present disclosure relates to telecommunications closures, and more particularly to valve assemblies and cable grounding assemblies for use in the telecommunications closures.
  • Telecommunications systems typically employ a network of
  • Telecommunications cables capable of transmitting large volumes of data and voice signals over relatively long distances.
  • Telecommunications cables can include fiber optic cables, electrical cables, or combinations of electrical and fiber optic cables.
  • a typical telecommunications network also includes a plurality of telecommunications closures integrated throughout the network of telecommunications cables. The telecommunications closures are adapted to house and protect telecommunications components such as splices, termination panels, power splitters, and wave division multiplexers.
  • the closures need to be water and contaminant (e.g., dust) proof and/or water-resistant.
  • contaminant e.g., dust
  • water, moisture, cleaning fluids, dust, etc. should be prevented from reaching components within the interior of the closures.
  • pressurized gel-type seals have been used to effectively seal the locations where telecommunications cables enter and exit the closures.
  • a valve may be used to test the sealing of a
  • telecommunications closure For example, pressure can be applied to the closure through a valve included in a wall of the closure, and the pressure of the closure can be monitored through the valve. If the pressure in the closure remains the same, the closure is environmentally sealed. In contrast, if the pressure in the closure decreases, the closure is cracked or leaking, and thus the closure is not environmentally sealed.
  • the electrical grounding may be used to dissipate static electricity, provide a return path for electrical power, provide a safety ground in case of equipment malfunction, etc.
  • Some closures are made of nonconductive material such as plastic, fiber glass, etc. Since a closure may not readily conduct electricity, a grounding stud can be passed through a wall of the closure to provide a grounding point on an exterior and interior of the closure.
  • the grounding stud may include threaded connections for attaching terminals to the grounding stud at the interior and/or the exterior of the closure. To facilitate installing and/or removing the terminals from the threaded connections, the grounding stud may be rotationally connected to the closure.
  • the present disclosure relates generally to a valve and cable grounding assembly for use in telecommunications closures that can ground the closures and control the airflow into and out of the closures.
  • the disclosed technology relates to a valve and grounding assembly for grounding and controlling the airflow in a telecommunications closure, the valve and grounding assembly comprising: a grounding stud extending from a first end to a second end along a central axis, the grounding stud having a hollow bore; a first radial surface at the first end of the grounding stud configured to hold a first grounding wire, and a second radial surface at the second end of the grounding stud configured to hold a second grounding wire; and a valve inside the hollow bore, the valve configured to control air flow into and out of the telecommunications closure through the grounding stud.
  • the valve can include a valve stem biased in a closed position by a biasing force from a spring, the valve stem movable from the closed position to an open position when pushed to overcome the biasing force.
  • the first radial surface is a threaded surface configured to thread an eyelet on a terminal of the first grounding wire
  • the second radial surface is a threaded surface configured to thread an eyelet on a terminal of the second grounding wire.
  • the first radial surface is a threaded surface configured to thread at least one nut to secure the first grounding wire on the grounding stud
  • the second radial surface is a threaded surface configured to thread at least one nut to secure the second grounding wire on the grounding stud.
  • the valve and grounding assembly further comprises a plug attached to the grounding stud between the first end and the second end, the plug having a collar configured to seal an aperture in the telecommunications closure.
  • the plug can include a proximal end and a distal end, the proximal end configured to engage at least one nut to secure a terminal of the first grounding wire to the grounding stud, and the distal end configured to engage at least one nut to secure a terminal of the second grounding wire to the grounding stud.
  • the valve and grounding assembly is structured for insertion inside a dome or a base of the telecommunications closure.
  • valve and grounding assembly further comprises a flange located between the first end and the second end of the grounding stud, the flange having a perimeter that includes one or more facets, the one or more facets configured to engage one or more corresponding facets on an interior or an exterior surface of the telecommunications closure.
  • the flange includes a sealing member groove configured to receive an O-ring to seal an aperture in the telecommunications closure.
  • the valve and grounding assembly is configured for insertion inside a dome or a base of the telecommunications closure.
  • valve and grounding assembly further comprises a first flange located between the first end and a central portion of the grounding stud, the first flange configured to engage at least one nut to hold a terminal of the first grounding wire on the first radial surface; and a second flange located between the second end and the central portion of the grounding stud, the second flange configured to engage at least one other nut to hold a terminal of the second grounding wire on the second radial surface.
  • the valve and grounding assembly is configured for insertion inside a cable port of the telecommunications closure.
  • the disclosed technology relates to a telecommunications closure arrangement comprising: a telecommunications closure having a dome attached to a base thereby defining an environmentally sealed interior; a valve and grounding assembly inserted through the telecommunications closure, the valve and grounding assembly having: a grounding stud extending from a first end to a second end along a central axis, the grounding stud having a hollow bore; a first radial surface at the first end of the grounding stud configured to hold a first ground conductor; a second radial surface at the second end of the grounding stud configured to hold a second ground conductor; and a valve inside the hollow bore, the valve configured to control airflow into and out of the telecommunications closure through the grounding stud.
  • the base includes a cable port, and the valve and grounding assembly is inserted in the cable port.
  • valve and grounding assembly is inserted through an aperture in the dome or the base.
  • the dome includes a cutout that accommodates the valve and grounding assembly, and the valve and grounding assembly is inserted through an aperture in the cutout.
  • the valve is configured to apply a pressure to the
  • the disclosed technology relates to a method of grounding and controlling the airflow in a telecommunications closure, the method comprising:
  • telecommunications closure attaching a second ground conductor to the second radial surface; using a valve inside a hollow bore of the grounding stud to apply a pressure inside an interior of the telecommunications closure.
  • inserting the second radial surface through the aperture includes inserting the grounding stud through a cable port. In some examples, the method further comprises using a sealing block to seal the grounding stud inside the cable port.
  • inserting the second radial surface through the aperture includes inserting the grounding stud through an aperture in a dome or in a base. In some examples, the method further comprises using a gel to seal the grounding stud in the aperture in the base or in the dome.
  • attaching the first ground conductor to the first radial surface includes threading an eyelet of the first ground conductor on the first radial surface, and threading at least one nut for securing the first ground conductor to the first radial surface.
  • attaching the second ground conductor to the second radial surface includes threading an eyelet of the second ground conductor on the second radial surface, and threading at least one nut for securing the second ground conductor to the second radial surface.
  • inventive aspects can relate to individual features and to combinations of features. It is to be understood that both the forgoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the examples disclosed herein are based.
  • FIG. 1 is an isometric view of a telecommunications closure with a dome and a base attached together, and a first example of a valve and grounding assembly inserted in the dome of the telecommunications closure.
  • FIG. 2 is an isometric view of the valve and grounding assembly of FIG. 1.
  • FIG. 3 is an exploded view of the valve and grounding assembly of FIG. 1.
  • FIG. 4 is a partial cross-sectional view of the telecommunications closure of FIG. 1 with the valve and grounding assembly inserted in the dome of the closure.
  • FIG. 5 is an isometric view of a telecommunications closure with a dome and a base attached together, and a second example of a valve and grounding assembly inserted in the dome of the telecommunication closure.
  • FIG. 6 is an isometric view of the valve and grounding assembly of FIG. 5.
  • FIG. 7 is an exploded view of the valve and grounding assembly of FIG. 5.
  • FIG. 8 is a partial cross-sectional view of the dome of the telecommunications closure of FIG. 5 with the valve and grounding assembly inserted therein.
  • FIG. 9 is a cutaway perspective view of a portion of the telecommunications closure showing a seat having an aperture.
  • FIG. 10 is an isometric view of a telecommunications closure with a dome and a base attached together, and the second example of the valve and grounding assembly of FIGS. 6 and 7 inserted in the base of the telecommunication closure.
  • FIG. 11 is a partial cross-sectional view of the base of the telecommunications closure of FIG. 10 and the second example of the valve and grounding assembly.
  • FIG. 12 is an isometric view of a sealing block for a telecommunication closure, and a third example of a valve and grounding assembly inserted in the sealing block.
  • FIG. 13 is an isometric view of the valve and grounding assembly of FIG. 12.
  • FIG. 14 is an exploded view of the valve and grounding assembly of FIG. 12.
  • FIG. 15 is a top view of the sealing block in a disassembled state, and the third example of the valve and grounding assembly partially inserted therein.
  • FIG. 16 illustrates a method of grounding and controlling the airflow in a telecommunications closure.
  • FIG. 1 is an isometric view of a telecommunications closure arrangement 10 that includes a telecommunications closure 50, and a first example of a valve and grounding assembly 100 inserted in the telecommunications closure 50.
  • the valve and grounding assembly 100 can be used to simultaneously ground and test the environmental sealing of the telecommunications closure 50.
  • the telecommunications closure 50 includes a dome 52 and a base 54 that attach together to house and protect telecommunications components such as cables, splices, termination panels, power splitters, and wave division multiplexers. Cable clamps (not shown) and other similar structures can be used to fix in place the cables and other telecommunications components housed inside telecommunications closure 50.
  • the dome 52 includes a series of clamps 56 around a lower peripheral edge.
  • the lower peripheral edge of the dome 52 fits inside a corresponding groove in the base 54.
  • the clamps 56 can be used to join to the dome 52 and base 54 together such that a water-resistant and contaminate proof seal is formed between the dome 52 and the base 54.
  • the telecommunications closure 50 can be reopened and closed by unclamping and clamping the clamps 56. In this manner, the telecommunication components housed inside the interior of the telecommunications closure 50 can be accessed without requiring the removal and destruction of the telecommunications closure 50.
  • the dome 52 further includes a series of tabs 60 that are positioned around the exterior of the dome 52.
  • the tabs 60 each include an aperture 62 that can receive a fastener for fixing the dome 52 (and hence the telecommunications closure 50) to a structure such as a wall of a building or a wall of an underground hand hole box.
  • the base 54 includes a series of cable ports 58 that allow cables such as fiber optic cables and other types of cables to be run inside the telecommunications closure 50.
  • the number, size, shape, and orientation of the cable ports 58 in the base 54 may vary as may be needed or desired for a particular application.
  • the telecommunications closure 50 When assembled, the telecommunications closure 50 is water-resistant and contaminant (e.g., dust) proof.
  • the telecommunications closure 50 is environmentally sealed such that water, moisture, fluids, dust etc., are prevented from reaching the telecommunications equipment housed within the interior of the telecommunications closure 50.
  • sealing blocks having cutouts can be compressed around the cable to form a seal.
  • the telecommunications closure 50 can be customized to accommodate varying numbers and sizes of cables that enter the telecommunications closure 50 by swapping out the sealing blocks. For example, sealing blocks having cutouts of a first diameter can be replaced with sealing blocks having cutouts of a second diameter to
  • sealing blocks 58 that are not in use can be closed off by swapping out sealing blocks having cable cutouts for sealing blocks that do not have cutouts.
  • the telecommunications closure 50 can be made from nonconductive materials such as plastic, fiber glass, etc. Since the telecommunications closure 50 does not readily conduct electricity, the valve and grounding assembly 100 can be passed through a wall of the telecommunications closure 50 and thereby provide a grounding point on both the exterior and interior of the telecommunications closure 50.
  • the valve and grounding assembly 100 is inserted through the dome 52 of the telecommunications closure 50.
  • the dome 52 includes a housing 70 that accommodates the valve and grounding assembly 100.
  • the valve and grounding assembly 100 is insertable through an aperture 72 (shown in FIG. 4) in the housing 70.
  • the aperture 72 is factory installed. In other examples, the aperture 72 is drilled in the field.
  • the walls of the housing 70 surround the valve and grounding assembly 100 and can protect it from impact with an object and from outside elements. Also, the valve and grounding assembly 100 is accessible from the exterior of the telecommunications closure 50 via openings along the side and top of the housing 70.
  • valve and grounding assembly 100 is insertable through an aperture in the dome 52 without the housing 70. In other examples, the valve and grounding assembly 100 is insertable through an aperture in the base 54.
  • FIG. 2 is an isometric view of the valve and grounding assembly 100.
  • FIG. 3 is an exploded view of the valve and grounding assembly 100. Referring now to FIGS. 2 and 3, the valve and grounding assembly 100 includes a central axis A-A, and a grounding stud 102 that extends from a first end 104 to a second end 106 along the central axis A-A.
  • the grounding stud 102 includes a first radial surface 112 proximate the first end 104, and a second radial surface 114 proximate the second end 106.
  • the first radial surface 112 is structured to hold a first grounding wire 500
  • the second radial surface 114 is structured to hold a second grounding wire 600.
  • the first radial surface 112 and the second radial surface 114 are threaded surfaces.
  • a terminal 502 of the first grounding wire 500 includes an eyelet 504, and a terminal 602 of the second grounding wire 600 includes an eyelet 604.
  • the eyelet 504 can be threaded on the first radial surface 112 to connect the first grounding wire 500 to the grounding stud 102.
  • the eyelet 604 can be threaded on the second radial surface 114 to connect the second grounding wire 600 to the grounding stud 102.
  • the valve and grounding assembly 100 can be rotationally connected to the telecommunications closure 50.
  • the grounding stud 102 defines a hollow bore 108 between the first end 104 and the second end 106.
  • a valve 134 is located inside the hollow bore 108 of the grounding stud 102. Since the telecommunications closure 50 is environmentally sealed when assembled, the valve 134 can be used to maintain or apply a pressure to the interior of the telecommunications closure 50.
  • FIG. 4 is a partial cross-sectional view of the valve and grounding 100 inserted in the dome 52 of the telecommunications closure 50.
  • the valve 134 has a valve stem 136 biased in a closed position by a biasing force from a spring 138.
  • the valve stem 136 can be pushed to overcome the biasing force from the spring 138 to move the valve 134 to an open position.
  • pressure can be applied to or released from inside the telecommunications closure 50.
  • the valve 134 is a Schrader valve or similar valve.
  • a cap 130 can be threaded on the second radial surface 114 of the grounding stud 102 for covering the hollow bore 108 and protecting the valve 134.
  • the valve and grounding assembly 100 includes a plug 118 that is attached to the grounding stud 102 around a central portion 116 between the first end 104 and the second end 106. As shown in FIG. 4, the valve and grounding assembly 100 with the plug 118 attached thereto is insertable through the aperture 72 in the housing 70.
  • the plug 118 includes a collar 120 that seals the aperture 72.
  • the plug 118 is made from a soft plastic or rubber material.
  • the plug 118 includes a proximal end 122 and a distal end 124.
  • the proximal end 122 can cooperate with at least one nut (e.g., nut 140) to secure the terminal 502 of the first grounding wire 500 to the grounding stud 102.
  • the distal end 124 similarly can cooperate with at least one nut (e.g., nut 142 or nut 144) to secure the terminal 602 of the second grounding wire 600 to the grounding stud 102.
  • a lock washer 150 can be threaded on the first radial surface 112 of the grounding stud 102 between the terminal 502 of the first grounding wire 500 and the nut 140. Tightening the nut 140 on the first radial surface 112 causes the lock washer 150 to bite into the terminal 502 and thereby enhances the electrical connection between the grounding stud 102 and the first grounding wire 500.
  • a lock washer 152 can be threaded on the second radial surface 114 of the grounding stud 102 between the nut 142 and the terminal 602 of the second grounding wire 600. Tightening the nut 144 on the second radial surface 114 causes the lock washer 152 to bite into the terminal 602 and thereby enhances the electrical connection between the grounding stud 102 and the second grounding wire 600.
  • the valve and grounding assembly 100 including the grounding stud 102, the lock washers 150, 152, and the nuts 140, 142, 144 are each made from a conductive material.
  • these components can be made from stainless steel, copper, etc.
  • FIG. 5 is an isometric view of a telecommunications closure arrangement 20 that includes the telecommunications closure 50, and a second example of a valve and grounding assembly 200 inserted in the dome 52 of the telecommunications closure 50.
  • the valve and grounding assembly 200 can be used to ground the closure and control the airflow into and out of the closure.
  • valve and grounding assembly 200 is insertable through an aperture 72 (shown in FIG. 8) in the housing 70 of the dome 52. In alternative examples, the valve and grounding assembly 200 is insertable through an aperture in the dome 52 without the housing 70 or is insertable through an aperture in the base 54 (as shown in FIG. 11).
  • FIG. 6 is an isometric view of the valve and grounding assembly 200.
  • FIG. 7 is an exploded view of the valve and grounding assembly 200.
  • the valve and grounding assembly 200 includes features similar to the features described above with respect to the first example of the valve and grounding assembly 100 in FIGS. 1-4.
  • the valve and grounding assembly 200 includes a central axis A-A, and a grounding stud 202 that extends from a first end 204 to a second end 206 along the central axis A-A.
  • the grounding stud 202 includes a first radial surface 212 proximate the first end 204, and a second radial surface 214 proximate the second end 206.
  • the first radial surface 212 is structured to hold the first grounding wire 500
  • the second radial surface 214 is structured to hold the second grounding wire 600.
  • the first radial surface 212 and the second radial surface 214 can be threaded surfaces.
  • the eyelet 504 of the terminal 502 can be threaded on the first radial surface 212 to connect the first grounding wire 500 to the grounding stud 202.
  • the eyelet 604 of the terminal 602 can be threaded on the second radial surface 214 to connect the second grounding wire 600 to the grounding stud 202.
  • the grounding stud 202 defines a hollow bore 208 around the central axis A-A between the first end 204 and the second end 206.
  • a valve 234 is located inside the hollow bore 208 of the grounding stud 202. The valve 234 can be used to maintain or apply a pressure to the interior of the
  • FIG. 8 is a partial cross-sectional view of the valve and grounding assembly 200 inserted in the dome 52 of the telecommunications closure 50.
  • the valve 234 has a valve stem 236 biased in a closed position by a biasing force from a spring 238.
  • the valve stem 236 can be pushed to overcome the biasing force from the spring 238 to move the valve 234 to an open position.
  • pressure can be applied to or released from inside the
  • valve 234 is a Schrader valve or similar type of valve.
  • a cap 230 can be threaded on the second radial surface 214 of the grounding stud 202 to cover the hollow bore 208 and to protect the valve 234.
  • the valve and grounding assembly 200 includes a flange 218 located between the first end 204 and the second end 206 of the grounding stud 202.
  • the flange 218 has a perimeter 220 that includes one or more facets 222.
  • the flange 218 has a hexagonal shape and accordingly has six facets. It is contemplated that other perimeter shapes are possible, and accordingly the number of facets 222 around the perimeter 220 may vary.
  • FIG. 9 is a cutaway perspective view of a portion 80 of the telecommunications closure 50.
  • the portion 80 is part of the interior surface of the dome 52 or the interior surface of the base 54.
  • the portion 80 is part of the exterior surface of the dome 52 or the exterior surface of the base 54.
  • the portion 80 includes a seat 82 having the aperture 72. As described above, a portion of the valve and grounding assembly 200 is insertable through the aperture 72.
  • the aperture 72 is factory installed in the telecommunications closure 50. In other examples, the aperture 72 is drilled in the field.
  • the seat 82 has a perimeter 84 having one or more facets 86.
  • the seat 82 has a hexagonal shape and has six facets. Other shapes are possible, and accordingly the number of facets 86 in the seat 82 may vary.
  • the perimeter 84 of the seat 82 corresponds to the perimeter 220 of the flange 218 such that the facets 222 of the flange 218 are alignable with the facets 86 of the seat 82. Accordingly, when the valve and grounding assembly 200 is inserted through the aperture 72, the facets 86 of the seat 82 prevent the valve and grounding assembly 200 from rotating with respect to the telecommunications closure 50.
  • valve and grounding assembly 200 is insertable through the aperture 72 in a telecommunications closure that does not include the seat 82.
  • the valve and grounding assembly 200 can be rotationally connected to the telecommunications closure 50 to facilitate installing and removing the terminals 502, 602 to the grounding stud 202 of the valve and grounding assembly 200.
  • valve and grounding assembly 200 can include a sealing member groove 224 that can receive an O-ring 232 (shown in FIG. 8) to seal a space between the flange 218 and the telecommunications closure 50.
  • At least one nut can be used to secure the terminal 502 of the first grounding wire 500 to the grounding stud 202.
  • at least one nut e.g., nut 242 or nut 244
  • a lock washer 250 can be threaded on the first radial surface 212 of the grounding stud 202 between the terminal 502 of the first grounding wire 500 and the nut 240. Tightening the nut 240 on the first radial surface 212 causes the lock washer 250 to bite into the terminal 502 and thereby enhances the electrical connection between the grounding stud 202 and the first grounding wire 500.
  • a lock washer 252 can be threaded on the second radial surface 214 of the grounding stud 202 between the nut 242 and the terminal 602 of the second grounding wire 600. Tightening the nut 244 on the second radial surface 214 causes the lock washer 252 to bite into the terminal 602 and thereby enhances the electrical connection between the grounding stud 202 and the second grounding wire 600.
  • the valve and grounding assembly 200 including the grounding stud 202, the lock washers 250, 252, and the nuts 240, 242, 244 are each made from a conductive material.
  • these components can be made from stainless steel, copper, etc.
  • valve and grounding assembly 200 provides efficient use of the space within a
  • FIG. 10 is an isometric view of a telecommunications closure arrangement 30 that includes the telecommunications closure 50 having the dome 52 and the base 54, and the second example of the valve and grounding assembly 200 inserted through an aperture in the base 54 of the telecommunications closure 50.
  • FIG. 11 is a partial cross- sectional view of the valve and grounding assembly 200 inserted in the base 54.
  • FIG. 12 is an isometric view of a sealing block 90 for a telecommunications closure, and a third example of a valve and grounding assembly 300 retained by one of the cutouts 96 in the sealing block 90.
  • the sealing block 90 can be used to seal the valve and grounding assembly 300 inside a cable port of a telecommunications closure.
  • the valve and grounding assembly 300 can be used to simultaneously ground a telecommunications closure and to control the airflow into and out of the closure.
  • FIG. 13 is an isometric view of the valve and grounding assembly 300.
  • FIG. 14 is an exploded view of the valve and grounding assembly 300.
  • the valve and grounding assembly 300 includes features similar to the features described above with respect to the first example of the valve and grounding assembly 100 in FIGS. 1-4, and the second example of the valve and grounding assembly 200 in FIGS. 5-8.
  • the valve and grounding assembly 300 has a central axis A-A, and a grounding stud 302 that extends from a first end 304 to a second end 306 along the central axis A-A.
  • the grounding stud 302 includes a first radial surface 312 proximate the first end 304, and a second radial surface 314 proximate the second end 306.
  • the first radial surface 312 is structured to hold the first grounding wire 500.
  • the second radial surface 314 is structured to hold the second grounding wire 600.
  • the first radial surface 312 and the second radial surface 314 can be threaded surfaces.
  • the eyelet 504 of the terminal 502 can be threaded on the first radial surface 312 to connect the first grounding wire 500 to the grounding stud 302.
  • the eyelet 604 of the terminal 602 can be threaded on the second radial surface 314 to connect the second grounding wire 600 to the grounding stud 302.
  • the grounding stud 302 defines a hollow bore 308 between the first end 304 and the second end 306.
  • a valve 334 is located inside the hollow bore 308 of the grounding stud 302. The valve 334 can be used to maintain or apply a pressure to the interior of a telecommunications closure.
  • the valve 334 is similar to the valves 134 and 234 described above, and has a valve stem 336 biased in a closed position by a biasing force from a spring.
  • the valve stem 336 can be pushed to overcome the biasing force from the spring to move the valve 334 to an open position.
  • pressure can be applied to or released from inside a telecommunications closure.
  • the valve 334 is a Schrader valve or similar valve.
  • a cap 330 can be threaded on the second radial surface 314 to cover the hollow bore 308 and to protect the valve 334.
  • the valve and grounding assembly 300 includes a first flange 360 located between the first end 304 and a central portion 316 of the grounding stud 302, and a second flange 370 located between the second end 306 and the central portion 316 of the grounding stud 302.
  • the first flange 360 is structured to cooperate with at least one nut (e.g., nut 340) to hold the terminal 502 of the first grounding wire 500 on the first radial surface 312.
  • the second flange 370 is structured to cooperate with another nut (e.g., nut 342) to hold the terminal 602 of the second grounding wire 600 on the second radial surface 314.
  • a lock washer 350 can be threaded on the first radial surface 312 of the grounding stud 302 between the terminal 502 of the first grounding wire 500 and the nut 340. Tightening the nut 340 on the first radial surface 312 causes the lock washer 350 to bite into the terminal 502 and thereby enhances the electrical connection between the grounding stud 302 and the first grounding wire 500.
  • a lock washer 352 can be threaded on the second radial surface 314 of the grounding stud 302 between the nut 342 and the terminal 602 of the second grounding wire 600. Tightening the nut 342 on the second radial surface 314 causes the lock washer 352 to bite into the terminal 602 and thereby enhances the electrical connection between the grounding stud 302 and the second grounding wire 600.
  • FIG. 15 is a top view of the sealing block 90 in a disassembled state, and the third example of the valve and grounding assembly 300 partially inserted therein.
  • the sealing block 90 includes a first piece 92 separated from a second piece 94.
  • the first piece 92 and the second piece 94 each partially define the cutouts 96.
  • the valve and grounding assembly 300 can be received by one of the cutouts 96 partially defined by the first piece 92.
  • the sealing block 90 wraps around the valve and grounding assembly 300. Thereafter, the sealing block 90 and the valve and grounding assembly 300 can be inserted in a telecommunications closure. When inserted in the telecommunications closure, the sealing block 90 is compressible around the valve and grounding assembly 300 thereby sealing the valve and grounding assembly 300 inside the closure.
  • the sealing block 90 can be customizable to accommodate varying sizes of the valve and grounding assembly 300.
  • the diameters of the cutouts 96 can be adjusted to accommodate different sizes for the valve and grounding assembly 300.
  • varying the degree of compression of the sealing block 90 about the valve and grounding assembly 300 can allow for selectively sealing different diameter assemblies.
  • valve and grounding assembly 300 provides efficient use of the space within a telecommunications closure for cable fixation and cable grounding.
  • FIG. 16 illustrates a method 700 of simultaneously grounding and testing the environmental sealing of a telecommunications closure.
  • the method 700 includes a step 702 of attaching a first ground conductor to a first radial surface of a grounding stud.
  • the first ground conductor can be a terminal end of a grounding wire.
  • attaching the first ground conductor to the first radial surface includes threading an eyelet of the first ground conductor on the first radial surface.
  • step 702 can include threading at least one nut onto the first radial surface for securing the terminal end of the first ground conductor to the first radial surface.
  • the method 700 includes a step 704 of inserting a second radial surface of the grounding stud through an aperture in the telecommunications closure.
  • the aperture is an aperture in a dome or in a base of the telecommunications closure.
  • the aperture can be factory installed or can be drilled in the field. Where the aperture is an aperture in the dome or the base of the
  • a sealant such as a gel can be used to seal the grounding stud in the aperture.
  • the aperture is a cable port in a base of a
  • the grounding stud can be sandwiched inside a cutout of a sealing block so that the sealing block is compressible around the grounding stud for sealing the grounding stud inside the cable port.
  • the method 700 can include environmentally sealing a base to a dome of the telecommunications closure, thereby creating an environmentally sealed interior in the telecommunications closure.
  • a series of clamps can be used to join to the base and dome together.
  • the environmentally sealed interior is water-resistant and contaminant (e.g., dust) proof such that water, moisture, fluids, dust etc. are prevented from reaching the interior of the telecommunications closure.
  • the method 700 includes a step 706 of attaching a second ground conductor to the second radial surface.
  • the second ground conductor can be a terminal end of a grounding wire having an eyelet.
  • attaching the second ground conductor to the second radial surface includes threading the eyelet of the second ground conductor on the second radial surface.
  • the step 706 can include threading at least one nut onto the second radial surface for securing the terminal end of the second ground conductor to the second radial surface.
  • the method 700 includes a step 708 of using the grounding stud to apply a pressure to the interior of the telecommunications closure to determine an existence of a leak in the interior.
  • the step 708 includes using a valve inside the grounding stud to apply a pressure to the interior of the closure, waiting for a predetermined amount of time, and then using the valve to measure the pressure inside the interior of the closure.
  • the pressure inside the interior of the telecommunications closure decreases, the telecommunications closure is leaking and is no longer environmentally sealed.
  • the method 700 may further include using the valve in the ground stud to release the pressure applied to the telecommunications closure so that the closure is depressurized.

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Abstract

A valve and grounding assembly for grounding and controlling airflow in a telecommunications closure is disclosed. The valve and grounding assembly includes a grounding stud extending from a first end to a second end along a central axis. The grounding stud has a hollow bore. A first radial surface at the first end of the grounding stud is configured to hold a first grounding wire, and a second radial surface at the second end of the grounding stud is configured to hold a second grounding wire. A valve inside the hollow bore is configured to control air flow into and out of the telecommunications closure through the grounding stud.

Description

VALVE AND GROUNDING ASSEMBLY FOR TELECOMMUNICATIONS
CLOSURES
Cross-Reference to Related Application
This application claims the benefit of U.S. Patent Application Serial No.
62/673,487, filed on May 18, 2018, the disclosure of which is incorporated herein by reference in its entirety.
Technical Field
The present disclosure relates to telecommunications closures, and more particularly to valve assemblies and cable grounding assemblies for use in the telecommunications closures.
Background
Telecommunications systems typically employ a network of
telecommunications cables capable of transmitting large volumes of data and voice signals over relatively long distances. Telecommunications cables can include fiber optic cables, electrical cables, or combinations of electrical and fiber optic cables. A typical telecommunications network also includes a plurality of telecommunications closures integrated throughout the network of telecommunications cables. The telecommunications closures are adapted to house and protect telecommunications components such as splices, termination panels, power splitters, and wave division multiplexers.
In certain applications, the closures need to be water and contaminant (e.g., dust) proof and/or water-resistant. In particular, water, moisture, cleaning fluids, dust, etc. should be prevented from reaching components within the interior of the closures. To provide such protection, pressurized gel-type seals have been used to effectively seal the locations where telecommunications cables enter and exit the closures.
In certain applications, a valve may be used to test the sealing of a
telecommunications closure. For example, pressure can be applied to the closure through a valve included in a wall of the closure, and the pressure of the closure can be monitored through the valve. If the pressure in the closure remains the same, the closure is environmentally sealed. In contrast, if the pressure in the closure decreases, the closure is cracked or leaking, and thus the closure is not environmentally sealed.
Also, in certain applications, there is a need to electrically ground certain telecommunications closures. The electrical grounding may be used to dissipate static electricity, provide a return path for electrical power, provide a safety ground in case of equipment malfunction, etc. Some closures are made of nonconductive material such as plastic, fiber glass, etc. Since a closure may not readily conduct electricity, a grounding stud can be passed through a wall of the closure to provide a grounding point on an exterior and interior of the closure. The grounding stud may include threaded connections for attaching terminals to the grounding stud at the interior and/or the exterior of the closure. To facilitate installing and/or removing the terminals from the threaded connections, the grounding stud may be rotationally connected to the closure.
Improvements in telecommunications closures in these areas are desired.
Summary
In one aspect, the present disclosure relates generally to a valve and cable grounding assembly for use in telecommunications closures that can ground the closures and control the airflow into and out of the closures.
In one aspect, the disclosed technology relates to a valve and grounding assembly for grounding and controlling the airflow in a telecommunications closure, the valve and grounding assembly comprising: a grounding stud extending from a first end to a second end along a central axis, the grounding stud having a hollow bore; a first radial surface at the first end of the grounding stud configured to hold a first grounding wire, and a second radial surface at the second end of the grounding stud configured to hold a second grounding wire; and a valve inside the hollow bore, the valve configured to control air flow into and out of the telecommunications closure through the grounding stud.
The valve can include a valve stem biased in a closed position by a biasing force from a spring, the valve stem movable from the closed position to an open position when pushed to overcome the biasing force. In some examples, the first radial surface is a threaded surface configured to thread an eyelet on a terminal of the first grounding wire, and the second radial surface is a threaded surface configured to thread an eyelet on a terminal of the second grounding wire. In some examples, the first radial surface is a threaded surface configured to thread at least one nut to secure the first grounding wire on the grounding stud, and the second radial surface is a threaded surface configured to thread at least one nut to secure the second grounding wire on the grounding stud.
In some examples, the valve and grounding assembly further comprises a plug attached to the grounding stud between the first end and the second end, the plug having a collar configured to seal an aperture in the telecommunications closure. The plug can include a proximal end and a distal end, the proximal end configured to engage at least one nut to secure a terminal of the first grounding wire to the grounding stud, and the distal end configured to engage at least one nut to secure a terminal of the second grounding wire to the grounding stud. In one aspect, the valve and grounding assembly is structured for insertion inside a dome or a base of the telecommunications closure.
In some examples, the valve and grounding assembly further comprises a flange located between the first end and the second end of the grounding stud, the flange having a perimeter that includes one or more facets, the one or more facets configured to engage one or more corresponding facets on an interior or an exterior surface of the telecommunications closure. In some examples, the flange includes a sealing member groove configured to receive an O-ring to seal an aperture in the telecommunications closure. In some examples, the valve and grounding assembly is configured for insertion inside a dome or a base of the telecommunications closure.
In some examples, the valve and grounding assembly further comprises a first flange located between the first end and a central portion of the grounding stud, the first flange configured to engage at least one nut to hold a terminal of the first grounding wire on the first radial surface; and a second flange located between the second end and the central portion of the grounding stud, the second flange configured to engage at least one other nut to hold a terminal of the second grounding wire on the second radial surface. In some examples, the valve and grounding assembly is configured for insertion inside a cable port of the telecommunications closure. In another aspect, the disclosed technology relates to a telecommunications closure arrangement comprising: a telecommunications closure having a dome attached to a base thereby defining an environmentally sealed interior; a valve and grounding assembly inserted through the telecommunications closure, the valve and grounding assembly having: a grounding stud extending from a first end to a second end along a central axis, the grounding stud having a hollow bore; a first radial surface at the first end of the grounding stud configured to hold a first ground conductor; a second radial surface at the second end of the grounding stud configured to hold a second ground conductor; and a valve inside the hollow bore, the valve configured to control airflow into and out of the telecommunications closure through the grounding stud.
In some examples, the base includes a cable port, and the valve and grounding assembly is inserted in the cable port.
In alternative examples, the valve and grounding assembly is inserted through an aperture in the dome or the base. In some examples, the dome includes a cutout that accommodates the valve and grounding assembly, and the valve and grounding assembly is inserted through an aperture in the cutout.
In some examples, the valve is configured to apply a pressure to the
telecommunications closure.
In another aspect, the disclosed technology relates to a method of grounding and controlling the airflow in a telecommunications closure, the method comprising:
attaching a first ground conductor to a first radial surface of a grounding stud; inserting a second radial surface of the grounding stud through an aperture in the
telecommunications closure; attaching a second ground conductor to the second radial surface; using a valve inside a hollow bore of the grounding stud to apply a pressure inside an interior of the telecommunications closure.
In some examples, inserting the second radial surface through the aperture includes inserting the grounding stud through a cable port. In some examples, the method further comprises using a sealing block to seal the grounding stud inside the cable port.
In some examples, inserting the second radial surface through the aperture includes inserting the grounding stud through an aperture in a dome or in a base. In some examples, the method further comprises using a gel to seal the grounding stud in the aperture in the base or in the dome.
In some examples, attaching the first ground conductor to the first radial surface includes threading an eyelet of the first ground conductor on the first radial surface, and threading at least one nut for securing the first ground conductor to the first radial surface.
In some examples, attaching the second ground conductor to the second radial surface includes threading an eyelet of the second ground conductor on the second radial surface, and threading at least one nut for securing the second ground conductor to the second radial surface.
A variety of additional inventive aspects will be set forth in the description that follows. The inventive aspects can relate to individual features and to combinations of features. It is to be understood that both the forgoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the examples disclosed herein are based.
Brief Description of the Drawings
The following drawings are illustrative of particular embodiments of the present disclosure and therefore do not limit the scope of the present disclosure. The drawings are not to scale and are intended for use in conjunction with the explanations in the following detailed description. Embodiments of the present disclosure will hereinafter be described in conjunction with the appended drawings, wherein like numerals denote like elements.
FIG. 1 is an isometric view of a telecommunications closure with a dome and a base attached together, and a first example of a valve and grounding assembly inserted in the dome of the telecommunications closure.
FIG. 2 is an isometric view of the valve and grounding assembly of FIG. 1.
FIG. 3 is an exploded view of the valve and grounding assembly of FIG. 1.
FIG. 4 is a partial cross-sectional view of the telecommunications closure of FIG. 1 with the valve and grounding assembly inserted in the dome of the closure. FIG. 5 is an isometric view of a telecommunications closure with a dome and a base attached together, and a second example of a valve and grounding assembly inserted in the dome of the telecommunication closure.
FIG. 6 is an isometric view of the valve and grounding assembly of FIG. 5.
FIG. 7 is an exploded view of the valve and grounding assembly of FIG. 5.
FIG. 8 is a partial cross-sectional view of the dome of the telecommunications closure of FIG. 5 with the valve and grounding assembly inserted therein.
FIG. 9 is a cutaway perspective view of a portion of the telecommunications closure showing a seat having an aperture.
FIG. 10 is an isometric view of a telecommunications closure with a dome and a base attached together, and the second example of the valve and grounding assembly of FIGS. 6 and 7 inserted in the base of the telecommunication closure.
FIG. 11 is a partial cross-sectional view of the base of the telecommunications closure of FIG. 10 and the second example of the valve and grounding assembly.
FIG. 12 is an isometric view of a sealing block for a telecommunication closure, and a third example of a valve and grounding assembly inserted in the sealing block.
FIG. 13 is an isometric view of the valve and grounding assembly of FIG. 12.
FIG. 14 is an exploded view of the valve and grounding assembly of FIG. 12.
FIG. 15 is a top view of the sealing block in a disassembled state, and the third example of the valve and grounding assembly partially inserted therein.
FIG. 16 illustrates a method of grounding and controlling the airflow in a telecommunications closure.
Detailed Description
Various embodiments of the present invention will be described in detail with reference to the drawings, wherein like reference numerals represent like parts and assemblies throughout the several views. Reference to various embodiments does not limit the scope of the invention, which is limited only by the scope of the claims attached hereto. Any examples set forth in this specification are not intended to be limiting and merely set forth some of the many possible embodiments for the claimed invention. FIG. 1 is an isometric view of a telecommunications closure arrangement 10 that includes a telecommunications closure 50, and a first example of a valve and grounding assembly 100 inserted in the telecommunications closure 50. As will be described in more detail, the valve and grounding assembly 100 can be used to simultaneously ground and test the environmental sealing of the telecommunications closure 50.
The telecommunications closure 50 includes a dome 52 and a base 54 that attach together to house and protect telecommunications components such as cables, splices, termination panels, power splitters, and wave division multiplexers. Cable clamps (not shown) and other similar structures can be used to fix in place the cables and other telecommunications components housed inside telecommunications closure 50.
The dome 52 includes a series of clamps 56 around a lower peripheral edge. The lower peripheral edge of the dome 52 fits inside a corresponding groove in the base 54. The clamps 56 can be used to join to the dome 52 and base 54 together such that a water-resistant and contaminate proof seal is formed between the dome 52 and the base 54.
The telecommunications closure 50 can be reopened and closed by unclamping and clamping the clamps 56. In this manner, the telecommunication components housed inside the interior of the telecommunications closure 50 can be accessed without requiring the removal and destruction of the telecommunications closure 50.
The dome 52 further includes a series of tabs 60 that are positioned around the exterior of the dome 52. The tabs 60 each include an aperture 62 that can receive a fastener for fixing the dome 52 (and hence the telecommunications closure 50) to a structure such as a wall of a building or a wall of an underground hand hole box.
The base 54 includes a series of cable ports 58 that allow cables such as fiber optic cables and other types of cables to be run inside the telecommunications closure 50. The number, size, shape, and orientation of the cable ports 58 in the base 54 may vary as may be needed or desired for a particular application.
When assembled, the telecommunications closure 50 is water-resistant and contaminant (e.g., dust) proof. In particular, the telecommunications closure 50 is environmentally sealed such that water, moisture, fluids, dust etc., are prevented from reaching the telecommunications equipment housed within the interior of the telecommunications closure 50. To accommodate cables and other components that enter the telecommunications closure 50 through the cable ports 58, sealing blocks having cutouts can be compressed around the cable to form a seal.
The telecommunications closure 50 can be customized to accommodate varying numbers and sizes of cables that enter the telecommunications closure 50 by swapping out the sealing blocks. For example, sealing blocks having cutouts of a first diameter can be replaced with sealing blocks having cutouts of a second diameter to
accommodate a different diameter cable. In addition, varying the degree of compression of the sealing blocks about a cable can allow for selectively sealing different diameter cables. Also, cable ports 58 that are not in use can be closed off by swapping out sealing blocks having cable cutouts for sealing blocks that do not have cutouts.
The telecommunications closure 50 can be made from nonconductive materials such as plastic, fiber glass, etc. Since the telecommunications closure 50 does not readily conduct electricity, the valve and grounding assembly 100 can be passed through a wall of the telecommunications closure 50 and thereby provide a grounding point on both the exterior and interior of the telecommunications closure 50.
As shown in the example of FIG. 1, the valve and grounding assembly 100 is inserted through the dome 52 of the telecommunications closure 50. In the depicted example, the dome 52 includes a housing 70 that accommodates the valve and grounding assembly 100. The valve and grounding assembly 100 is insertable through an aperture 72 (shown in FIG. 4) in the housing 70. In some examples, the aperture 72 is factory installed. In other examples, the aperture 72 is drilled in the field.
As shown in FIG. 1, the walls of the housing 70 surround the valve and grounding assembly 100 and can protect it from impact with an object and from outside elements. Also, the valve and grounding assembly 100 is accessible from the exterior of the telecommunications closure 50 via openings along the side and top of the housing 70.
In alternative examples, the valve and grounding assembly 100 is insertable through an aperture in the dome 52 without the housing 70. In other examples, the valve and grounding assembly 100 is insertable through an aperture in the base 54. FIG. 2 is an isometric view of the valve and grounding assembly 100. FIG. 3 is an exploded view of the valve and grounding assembly 100. Referring now to FIGS. 2 and 3, the valve and grounding assembly 100 includes a central axis A-A, and a grounding stud 102 that extends from a first end 104 to a second end 106 along the central axis A-A.
The grounding stud 102 includes a first radial surface 112 proximate the first end 104, and a second radial surface 114 proximate the second end 106. The first radial surface 112 is structured to hold a first grounding wire 500, and the second radial surface 114 is structured to hold a second grounding wire 600.
In the example shown in the FIG. 3, the first radial surface 112 and the second radial surface 114 are threaded surfaces. A terminal 502 of the first grounding wire 500 includes an eyelet 504, and a terminal 602 of the second grounding wire 600 includes an eyelet 604. The eyelet 504 can be threaded on the first radial surface 112 to connect the first grounding wire 500 to the grounding stud 102. Similarly, the eyelet 604 can be threaded on the second radial surface 114 to connect the second grounding wire 600 to the grounding stud 102. In some examples, to facilitate installing and removing the terminals 502, 602 to the grounding stud 102, the valve and grounding assembly 100 can be rotationally connected to the telecommunications closure 50.
Still referring to FIGS. 2 and 3, the grounding stud 102 defines a hollow bore 108 between the first end 104 and the second end 106. A valve 134 is located inside the hollow bore 108 of the grounding stud 102. Since the telecommunications closure 50 is environmentally sealed when assembled, the valve 134 can be used to maintain or apply a pressure to the interior of the telecommunications closure 50.
FIG. 4 is a partial cross-sectional view of the valve and grounding 100 inserted in the dome 52 of the telecommunications closure 50. Referring now to FIGS. 3 and 4, the valve 134 has a valve stem 136 biased in a closed position by a biasing force from a spring 138. The valve stem 136 can be pushed to overcome the biasing force from the spring 138 to move the valve 134 to an open position. When in the open position, pressure can be applied to or released from inside the telecommunications closure 50. In some examples, the valve 134 is a Schrader valve or similar valve. A cap 130 can be threaded on the second radial surface 114 of the grounding stud 102 for covering the hollow bore 108 and protecting the valve 134.
Referring to FIGS. 2, 3, and 4, the valve and grounding assembly 100 includes a plug 118 that is attached to the grounding stud 102 around a central portion 116 between the first end 104 and the second end 106. As shown in FIG. 4, the valve and grounding assembly 100 with the plug 118 attached thereto is insertable through the aperture 72 in the housing 70. The plug 118 includes a collar 120 that seals the aperture 72. In some examples, the plug 118 is made from a soft plastic or rubber material.
The plug 118 includes a proximal end 122 and a distal end 124. The proximal end 122 can cooperate with at least one nut (e.g., nut 140) to secure the terminal 502 of the first grounding wire 500 to the grounding stud 102. The distal end 124 similarly can cooperate with at least one nut (e.g., nut 142 or nut 144) to secure the terminal 602 of the second grounding wire 600 to the grounding stud 102.
In some examples, a lock washer 150 can be threaded on the first radial surface 112 of the grounding stud 102 between the terminal 502 of the first grounding wire 500 and the nut 140. Tightening the nut 140 on the first radial surface 112 causes the lock washer 150 to bite into the terminal 502 and thereby enhances the electrical connection between the grounding stud 102 and the first grounding wire 500.
Similarly, a lock washer 152 can be threaded on the second radial surface 114 of the grounding stud 102 between the nut 142 and the terminal 602 of the second grounding wire 600. Tightening the nut 144 on the second radial surface 114 causes the lock washer 152 to bite into the terminal 602 and thereby enhances the electrical connection between the grounding stud 102 and the second grounding wire 600.
The valve and grounding assembly 100 including the grounding stud 102, the lock washers 150, 152, and the nuts 140, 142, 144 are each made from a conductive material. For example, these components can be made from stainless steel, copper, etc.
It is generally desirable to maximize the volume of telecommunications closures for data transmission, e.g., by maximizing the number and size of the cables that can be distributed by a closure. The valve and grounding assembly 100 provides efficient use of the space within a telecommunications closure for cable fixation and cable grounding. FIG. 5 is an isometric view of a telecommunications closure arrangement 20 that includes the telecommunications closure 50, and a second example of a valve and grounding assembly 200 inserted in the dome 52 of the telecommunications closure 50. Like the first example described above, the valve and grounding assembly 200 can be used to ground the closure and control the airflow into and out of the closure.
The valve and grounding assembly 200 is insertable through an aperture 72 (shown in FIG. 8) in the housing 70 of the dome 52. In alternative examples, the valve and grounding assembly 200 is insertable through an aperture in the dome 52 without the housing 70 or is insertable through an aperture in the base 54 (as shown in FIG. 11).
FIG. 6 is an isometric view of the valve and grounding assembly 200. FIG. 7 is an exploded view of the valve and grounding assembly 200. The valve and grounding assembly 200 includes features similar to the features described above with respect to the first example of the valve and grounding assembly 100 in FIGS. 1-4.
Referring now to FIGS. 6 and 7, the valve and grounding assembly 200 includes a central axis A-A, and a grounding stud 202 that extends from a first end 204 to a second end 206 along the central axis A-A. The grounding stud 202 includes a first radial surface 212 proximate the first end 204, and a second radial surface 214 proximate the second end 206. The first radial surface 212 is structured to hold the first grounding wire 500, and the second radial surface 214 is structured to hold the second grounding wire 600.
The first radial surface 212 and the second radial surface 214 can be threaded surfaces. The eyelet 504 of the terminal 502 can be threaded on the first radial surface 212 to connect the first grounding wire 500 to the grounding stud 202. Similarly, the eyelet 604 of the terminal 602 can be threaded on the second radial surface 214 to connect the second grounding wire 600 to the grounding stud 202.
Still referring to FIGS. 6 and 7, the grounding stud 202 defines a hollow bore 208 around the central axis A-A between the first end 204 and the second end 206. A valve 234 is located inside the hollow bore 208 of the grounding stud 202. The valve 234 can be used to maintain or apply a pressure to the interior of the
telecommunications closure 50. FIG. 8 is a partial cross-sectional view of the valve and grounding assembly 200 inserted in the dome 52 of the telecommunications closure 50. Referring now to FIGS. 7 and 8, the valve 234 has a valve stem 236 biased in a closed position by a biasing force from a spring 238. The valve stem 236 can be pushed to overcome the biasing force from the spring 238 to move the valve 234 to an open position. When the valve 234 is in the open position, pressure can be applied to or released from inside the
telecommunications closure 50 through the valve 234. In some examples, the valve 234 is a Schrader valve or similar type of valve. A cap 230 can be threaded on the second radial surface 214 of the grounding stud 202 to cover the hollow bore 208 and to protect the valve 234.
Referring now to FIGS. 6, 7, and 8, the valve and grounding assembly 200 includes a flange 218 located between the first end 204 and the second end 206 of the grounding stud 202. The flange 218 has a perimeter 220 that includes one or more facets 222. In the example shown in FIGS. 6 and 7, the flange 218 has a hexagonal shape and accordingly has six facets. It is contemplated that other perimeter shapes are possible, and accordingly the number of facets 222 around the perimeter 220 may vary.
FIG. 9 is a cutaway perspective view of a portion 80 of the telecommunications closure 50. In some examples, the portion 80 is part of the interior surface of the dome 52 or the interior surface of the base 54. In other examples, the portion 80 is part of the exterior surface of the dome 52 or the exterior surface of the base 54.
As shown in FIG. 9, the portion 80 includes a seat 82 having the aperture 72. As described above, a portion of the valve and grounding assembly 200 is insertable through the aperture 72. In some examples, the aperture 72 is factory installed in the telecommunications closure 50. In other examples, the aperture 72 is drilled in the field.
The seat 82 has a perimeter 84 having one or more facets 86. In the example shown in FIG. 9, the seat 82 has a hexagonal shape and has six facets. Other shapes are possible, and accordingly the number of facets 86 in the seat 82 may vary.
The perimeter 84 of the seat 82 corresponds to the perimeter 220 of the flange 218 such that the facets 222 of the flange 218 are alignable with the facets 86 of the seat 82. Accordingly, when the valve and grounding assembly 200 is inserted through the aperture 72, the facets 86 of the seat 82 prevent the valve and grounding assembly 200 from rotating with respect to the telecommunications closure 50.
In alternative examples, the valve and grounding assembly 200 is insertable through the aperture 72 in a telecommunications closure that does not include the seat 82. In some examples, the valve and grounding assembly 200 can be rotationally connected to the telecommunications closure 50 to facilitate installing and removing the terminals 502, 602 to the grounding stud 202 of the valve and grounding assembly 200.
Referring back to FIGS. 6, 7, and 8, the valve and grounding assembly 200 can include a sealing member groove 224 that can receive an O-ring 232 (shown in FIG. 8) to seal a space between the flange 218 and the telecommunications closure 50.
At least one nut (e.g., nut 240) can be used to secure the terminal 502 of the first grounding wire 500 to the grounding stud 202. Similarly, at least one nut (e.g., nut 242 or nut 244) can be used to secure the terminal 602 of the second grounding wire 600 to the grounding stud 202. In some examples, a lock washer 250 can be threaded on the first radial surface 212 of the grounding stud 202 between the terminal 502 of the first grounding wire 500 and the nut 240. Tightening the nut 240 on the first radial surface 212 causes the lock washer 250 to bite into the terminal 502 and thereby enhances the electrical connection between the grounding stud 202 and the first grounding wire 500.
Similarly, a lock washer 252 can be threaded on the second radial surface 214 of the grounding stud 202 between the nut 242 and the terminal 602 of the second grounding wire 600. Tightening the nut 244 on the second radial surface 214 causes the lock washer 252 to bite into the terminal 602 and thereby enhances the electrical connection between the grounding stud 202 and the second grounding wire 600.
The valve and grounding assembly 200 including the grounding stud 202, the lock washers 250, 252, and the nuts 240, 242, 244 are each made from a conductive material. For example, these components can be made from stainless steel, copper, etc.
Like in the first example described above, it is generally desirable to maximize the volume of telecommunications closures for data transmission, e.g., by maximizing the number and size of the cables that can be distributed by a closure. The valve and grounding assembly 200 provides efficient use of the space within a
telecommunications closure for cable fixation and cable grounding. FIG. 10 is an isometric view of a telecommunications closure arrangement 30 that includes the telecommunications closure 50 having the dome 52 and the base 54, and the second example of the valve and grounding assembly 200 inserted through an aperture in the base 54 of the telecommunications closure 50. FIG. 11 is a partial cross- sectional view of the valve and grounding assembly 200 inserted in the base 54.
FIG. 12 is an isometric view of a sealing block 90 for a telecommunications closure, and a third example of a valve and grounding assembly 300 retained by one of the cutouts 96 in the sealing block 90. The sealing block 90 can be used to seal the valve and grounding assembly 300 inside a cable port of a telecommunications closure. Like the first and second examples described above, the valve and grounding assembly 300 can be used to simultaneously ground a telecommunications closure and to control the airflow into and out of the closure.
FIG. 13 is an isometric view of the valve and grounding assembly 300. FIG. 14 is an exploded view of the valve and grounding assembly 300. The valve and grounding assembly 300 includes features similar to the features described above with respect to the first example of the valve and grounding assembly 100 in FIGS. 1-4, and the second example of the valve and grounding assembly 200 in FIGS. 5-8.
Referring now to FIGS. 13 and 14, the valve and grounding assembly 300 has a central axis A-A, and a grounding stud 302 that extends from a first end 304 to a second end 306 along the central axis A-A. The grounding stud 302 includes a first radial surface 312 proximate the first end 304, and a second radial surface 314 proximate the second end 306. The first radial surface 312 is structured to hold the first grounding wire 500. The second radial surface 314 is structured to hold the second grounding wire 600.
The first radial surface 312 and the second radial surface 314 can be threaded surfaces. The eyelet 504 of the terminal 502 can be threaded on the first radial surface 312 to connect the first grounding wire 500 to the grounding stud 302. Similarly, the eyelet 604 of the terminal 602 can be threaded on the second radial surface 314 to connect the second grounding wire 600 to the grounding stud 302.
Still referring to FIGS. 13 and 14, the grounding stud 302 defines a hollow bore 308 between the first end 304 and the second end 306. A valve 334 is located inside the hollow bore 308 of the grounding stud 302. The valve 334 can be used to maintain or apply a pressure to the interior of a telecommunications closure.
The valve 334 is similar to the valves 134 and 234 described above, and has a valve stem 336 biased in a closed position by a biasing force from a spring. The valve stem 336 can be pushed to overcome the biasing force from the spring to move the valve 334 to an open position. When the valve 334 is in the open position, pressure can be applied to or released from inside a telecommunications closure. In some examples, the valve 334 is a Schrader valve or similar valve. A cap 330 can be threaded on the second radial surface 314 to cover the hollow bore 308 and to protect the valve 334.
Referring still to FIGS. 13 and 14, the valve and grounding assembly 300 includes a first flange 360 located between the first end 304 and a central portion 316 of the grounding stud 302, and a second flange 370 located between the second end 306 and the central portion 316 of the grounding stud 302. The first flange 360 is structured to cooperate with at least one nut (e.g., nut 340) to hold the terminal 502 of the first grounding wire 500 on the first radial surface 312. The second flange 370 is structured to cooperate with another nut (e.g., nut 342) to hold the terminal 602 of the second grounding wire 600 on the second radial surface 314.
In some examples, a lock washer 350 can be threaded on the first radial surface 312 of the grounding stud 302 between the terminal 502 of the first grounding wire 500 and the nut 340. Tightening the nut 340 on the first radial surface 312 causes the lock washer 350 to bite into the terminal 502 and thereby enhances the electrical connection between the grounding stud 302 and the first grounding wire 500.
Similarly, a lock washer 352 can be threaded on the second radial surface 314 of the grounding stud 302 between the nut 342 and the terminal 602 of the second grounding wire 600. Tightening the nut 342 on the second radial surface 314 causes the lock washer 352 to bite into the terminal 602 and thereby enhances the electrical connection between the grounding stud 302 and the second grounding wire 600.
The valve and grounding assembly 300 including the grounding stud 302, the lock washers 350, 352, and the nuts 340, 342 are each made from a conductive material. For example, these components can be made from stainless steel, copper, etc. FIG. 15 is a top view of the sealing block 90 in a disassembled state, and the third example of the valve and grounding assembly 300 partially inserted therein. The sealing block 90 includes a first piece 92 separated from a second piece 94. The first piece 92 and the second piece 94 each partially define the cutouts 96. As shown in FIG. 15, the valve and grounding assembly 300 can be received by one of the cutouts 96 partially defined by the first piece 92. When the first piece 92 and the second piece 94 attach together, the sealing block 90 wraps around the valve and grounding assembly 300. Thereafter, the sealing block 90 and the valve and grounding assembly 300 can be inserted in a telecommunications closure. When inserted in the telecommunications closure, the sealing block 90 is compressible around the valve and grounding assembly 300 thereby sealing the valve and grounding assembly 300 inside the closure.
The sealing block 90 can be customizable to accommodate varying sizes of the valve and grounding assembly 300. For example, the diameters of the cutouts 96 can be adjusted to accommodate different sizes for the valve and grounding assembly 300. Also, varying the degree of compression of the sealing block 90 about the valve and grounding assembly 300 can allow for selectively sealing different diameter assemblies.
Like in the first and second examples described above, it is generally desirable to maximize the volume of telecommunications closures for data transmission, e.g., by maximizing the number and size of the cables that can be distributed by a closure. The valve and grounding assembly 300 provides efficient use of the space within a telecommunications closure for cable fixation and cable grounding.
FIG. 16 illustrates a method 700 of simultaneously grounding and testing the environmental sealing of a telecommunications closure. The method 700 includes a step 702 of attaching a first ground conductor to a first radial surface of a grounding stud.
The first ground conductor can be a terminal end of a grounding wire. In some examples, attaching the first ground conductor to the first radial surface includes threading an eyelet of the first ground conductor on the first radial surface. In some examples, step 702 can include threading at least one nut onto the first radial surface for securing the terminal end of the first ground conductor to the first radial surface.
Next, the method 700 includes a step 704 of inserting a second radial surface of the grounding stud through an aperture in the telecommunications closure. In some examples, the aperture is an aperture in a dome or in a base of the telecommunications closure. In such examples, the aperture can be factory installed or can be drilled in the field. Where the aperture is an aperture in the dome or the base of the
telecommunications closure, a sealant such as a gel can be used to seal the grounding stud in the aperture.
In alternative examples, the aperture is a cable port in a base of a
telecommunications closure. In such examples, the grounding stud can be sandwiched inside a cutout of a sealing block so that the sealing block is compressible around the grounding stud for sealing the grounding stud inside the cable port.
In some examples, the method 700 can include environmentally sealing a base to a dome of the telecommunications closure, thereby creating an environmentally sealed interior in the telecommunications closure. In some examples, a series of clamps can be used to join to the base and dome together. The environmentally sealed interior is water-resistant and contaminant (e.g., dust) proof such that water, moisture, fluids, dust etc. are prevented from reaching the interior of the telecommunications closure.
Next, the method 700 includes a step 706 of attaching a second ground conductor to the second radial surface. The second ground conductor can be a terminal end of a grounding wire having an eyelet. In some examples, attaching the second ground conductor to the second radial surface includes threading the eyelet of the second ground conductor on the second radial surface. In some examples, the step 706 can include threading at least one nut onto the second radial surface for securing the terminal end of the second ground conductor to the second radial surface.
Next, the method 700 includes a step 708 of using the grounding stud to apply a pressure to the interior of the telecommunications closure to determine an existence of a leak in the interior. In some examples, the step 708 includes using a valve inside the grounding stud to apply a pressure to the interior of the closure, waiting for a predetermined amount of time, and then using the valve to measure the pressure inside the interior of the closure. In some examples, if the pressure inside the interior of the telecommunications closure decreases, the telecommunications closure is leaking and is no longer environmentally sealed. In some examples, if it is determined that the telecommunications closure is not leaking such that it is environmentally sealed, the method 700 may further include using the valve in the ground stud to release the pressure applied to the telecommunications closure so that the closure is depressurized.
Various modifications and alterations of this disclosure will become apparent to those skilled in the art without departing from the scope and spirit of this disclosure, and it should be understood that the scope of this disclosure is not to be unduly limited to the illustrative examples set forth herein.

Claims

WHAT IS CLAIMED:
1. A valve and grounding assembly for grounding and controlling the airflow in a telecommunications closure, the valve and grounding assembly comprising:
a grounding stud extending from a first end to a second end along a central axis, the grounding stud having a hollow bore;
a first radial surface at the first end of the grounding stud configured to hold a first grounding wire, and a second radial surface at the second end of the grounding stud configured to hold a second grounding wire; and
a valve inside the hollow bore, the valve configured to control air flow into and out of the telecommunications closure through the grounding stud.
2. The valve and grounding assembly of claim 1, wherein the valve includes a valve stem biased in a closed position by a biasing force from a spring, the valve stem movable from the closed position to an open position when pushed to overcome the biasing force.
3. The valve and grounding assembly of claim 1, wherein the first radial surface is a threaded surface configured to thread an eyelet on a terminal of the first grounding wire, and the second radial surface is a threaded surface configured to thread an eyelet on a terminal of the second grounding wire.
4 The valve and grounding assembly of claim 1, wherein the first radial surface is a threaded surface configured to thread at least one nut to secure the first grounding wire on the grounding stud, and the second radial surface is a threaded surface configured to thread at least one nut to secure the second grounding wire on the grounding stud.
5. The valve and grounding assembly of claim 1, further comprising a plug attached to the grounding stud between the first end and the second end, the plug having a collar configured to seal an aperture in the telecommunications closure.
6. The valve and grounding assembly of claim 5, wherein the plug includes a proximal end and a distal end, the proximal end configured to engage at least one nut to secure a terminal of the first grounding wire to the grounding stud, and the distal end configured to engage at least one nut to secure a terminal of the second grounding wire to the grounding stud.
7. The valve and grounding assembly of claim 5, wherein the valve and grounding assembly is structured for insertion inside a dome or a base of the telecommunications closure.
8. The valve and grounding assembly of claim 1, further comprising a flange located between the first end and the second end of the grounding stud, the flange having a perimeter that includes one or more facets, the one or more facets configured to engage one or more corresponding facets on an interior or an exterior surface of the telecommunications closure.
9. The valve and grounding assembly of claim 8, wherein the flange includes a sealing member groove configured to receive an O-ring to seal an aperture in the telecommunications closure.
10. The valve and grounding assembly of claim 8, wherein the valve and grounding assembly is configured for insertion inside a dome or a base of the telecommunications closure.
11. The valve and grounding assembly of claim 1, further comprising a first flange located between the first end and a central portion of the grounding stud, the first flange configured to engage at least one nut to hold a terminal of the first grounding wire on the first radial surface; and a second flange located between the second end and the central portion of the grounding stud, the second flange configured to engage at least one other nut to hold a terminal of the second grounding wire on the second radial surface.
12. The valve and grounding assembly of claim 11, wherein the valve and grounding assembly is configured for insertion inside a cable port of the
telecommunications closure.
13. A telecommunications closure comprising a dome attached to a base thereby defining an environmentally sealed interior, and further comprising the valve and grounding assembly of any of claims 1-12.
14. A telecommunications closure arrangement comprising:
a telecommunications closure having a dome attached to a base thereby defining an environmentally sealed interior;
a valve and grounding assembly inserted through the telecommunications closure, the valve and grounding assembly having:
a grounding stud extending from a first end to a second end along a central axis, the grounding stud having a hollow bore;
a first radial surface at the first end of the grounding stud configured to hold a first ground conductor;
a second radial surface at the second end of the grounding stud configured to hold a second ground conductor; and
a valve inside the hollow bore, the valve configured to control airflow into and out of the telecommunications closure through the grounding stud.
15. The telecommunications closure arrangement of claim 14, wherein the base includes a cable port, and the valve and grounding assembly is inserted in the cable port.
16. The telecommunications closure arrangement of claim 14, wherein the valve and grounding assembly is inserted through an aperture in the dome or the base.
17. The telecommunications closure arrangement of claim 14, wherein the dome includes a cutout that accommodates the valve and grounding assembly, and the valve and grounding assembly is inserted through an aperture in the cutout.
18. The telecommunications closure arrangement of claim 14, wherein the valve is configured to apply a pressure to the telecommunications closure.
19. A method of grounding and controlling the airflow in a telecommunications closure, the method comprising:
attaching a first ground conductor to a first radial surface of a grounding stud; inserting a second radial surface of the grounding stud through an aperture in the telecommunications closure;
attaching a second ground conductor to the second radial surface;
using a valve inside a hollow bore of the grounding stud to apply a pressure inside an interior of the telecommunications closure.
20. The method of claim 19, wherein inserting the second radial surface through the aperture includes inserting the grounding stud through a cable port.
21. The method of claim 20, further comprising using a sealing block to seal the grounding stud inside the cable port.
22. The method of claim 19, wherein inserting the second radial surface through the aperture includes inserting the grounding stud through an aperture in a dome or a base.
23. The method of claim 22, further comprising using a gel to seal the grounding stud in the aperture in the base or the dome.
24. The method of claim 19, wherein attaching the first ground conductor to the first radial surface includes threading an eyelet of the first ground conductor on the first radial surface, and threading at least one nut for securing the first ground conductor to the first radial surface.
25. The method of claim 19, wherein attaching the second ground conductor to the second radial surface includes threading an eyelet of the second ground conductor on the second radial surface, and threading at least one nut for securing the second ground conductor to the second radial surface.
PCT/EP2019/062648 2018-05-18 2019-05-16 Valve and grounding assembly for telecommunications closures WO2019219827A1 (en)

Applications Claiming Priority (2)

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US201862673487P 2018-05-18 2018-05-18
US62/673,487 2018-05-18

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769443A (en) * 1971-11-05 1973-10-30 Reliable Electric Co Buried-type splice case
US3808353A (en) * 1972-07-03 1974-04-30 Reliable Electric Co Grounding arrangement for splice case
US4320252A (en) * 1980-09-05 1982-03-16 Western Electric Company, Inc. Telecommunication cable closure
US4538021A (en) * 1984-04-06 1985-08-27 At&T Bell Laboratories, Inc. Cable closure having asymmetrical end plate assembly
WO2017114935A1 (en) * 2015-12-30 2017-07-06 CommScope Connectivity Belgium BVBA Housing with self-orienting grounding stud

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769443A (en) * 1971-11-05 1973-10-30 Reliable Electric Co Buried-type splice case
US3808353A (en) * 1972-07-03 1974-04-30 Reliable Electric Co Grounding arrangement for splice case
US4320252A (en) * 1980-09-05 1982-03-16 Western Electric Company, Inc. Telecommunication cable closure
US4538021A (en) * 1984-04-06 1985-08-27 At&T Bell Laboratories, Inc. Cable closure having asymmetrical end plate assembly
WO2017114935A1 (en) * 2015-12-30 2017-07-06 CommScope Connectivity Belgium BVBA Housing with self-orienting grounding stud

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