Interior pipe coating apparatus
OwnerPaul W. Rosen, Cary A. Gundersoninventors
Life of this patent
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Abstract
A coating apparatus for coating the interior surface of a relatively long, narrow pipe without any portion of the apparatus contacting the interior of the pipe has been provided, and comprises a mobile vehicle carrying a traveling boom on which is mounted a coating or spraying device for coating the pipe, an adjustment mechanism for moving the boom relative to the vehicle and to align the boom with the pipe, and a driving and supporting mechanism for the boom which drives and also supports the boom as it moves into and out of the relatively long, narrow pipe. In addition, several alternative embodiments of spraying devices for the coating apparatus are disclosed which eliminate or reduce "ghosting" or "shading" problems frequently experienced in coating such pipe.
Claims9
In apparatus for coating the interior surface of a pipe or the like, in combination, a mobile vehicle, a traveling boom reciprocally movable on said vehicle and adapted to be moved into and out of the pipe, adjustment means on said vehicle for varying the relative position of said traveling boom and bringing it into alignment with the longitudinal axis of the pipe, means on said vehicle for reciprocating and supporting said traveling boom for movement into and out of the pipe, said means for supporting said traveling boom being adapted to be always spaced from the interior surface of the pipe, and spraying means secured adjacent an end of said traveling boom, said reciprocating and supporting means comprising flexible means secured to opposite ends of said traveling boom, and a driven pulley rotatably supported on said vehicle, said flexible means having a mediate portion wrapping around said pulley, whereby rotation of said pulley drives said flexible means and said traveling boom, and the interior surface of the pipe may be coated without any portion of said apparatus touching the inner surface of the pipe.
In apparatus for coating the interior surface of a pipe or the like, in combination, a mobile vehicle adapted to travel directly across and on the ground, a traveling boom reciprocally movable on and relative to said vehicle and adapted to be moved into and out of the pipe, adjustment means on said vehicle for varying the relative position of said traveling boom and bringing it into alignment with the longitudinal axis of the pipe, means on said vehicle for reciprocating, supporting and guiding said traveling boom for movement into and out of the pipe, said means for reciprocating, supporting and guiding said traveling boom being spaced from and out-of-contact with the interior surface of the pipe, and spraying means secured adjacent an end of said traveling boom for applying a coating to the interior of the pipe, said spraying means being spaced from and out-of-contact with the interior surface of the pipe, said reciprocating, supporting and guiding means includes a flexible cable having one portion attached to said traveling boom and another portion attached to said vehicle, the attachment of at least one or the other portions permitting reciprocation of said traveling boom, whereby the interior surface of the pipe may be coated without any portion of said apparatus touching or contacting the inner surface of the pipe.
In apparatus for coating the interior surface of a generally vertical pipe or the like, in combination, a mobile vehicle adapted to travel directly across and on the ground, a traveling boom reciprocally movable on and relative to said vehicle and adapted to be moved into and out of the pipe, adjustment means on said vehicle for varying the relative position of said traveling boom and bringing it into alignment with the longitudinal axis of the pipe, means on said vehicle for reciprocating, supporting and guiding said traveling boom for movement into and out of the pipe, said means for reciprocating, supporting and guiding said traveling boom being spaced from and out-of-contact with the interior surface of the pipe, and spraying means secured adjacent an end of said traveling boom for applying a coating to the interior of the pipe, said spraying means being spaced from and out-of-contact with the interior surface of the pipe, said traveling boom extending vertically from said vehicle and being adapted to be extended downwardly into the generally vertical pipe, said apparatus further comprising a cradle guiding said traveling boom and extending generally vertically from said vehicle, said adjustment means comprising pivoting means on one end of said cradle and movement means at the opposite end of said cradle for varying the relative position of said cradle to the vertical pipe, said reciprocating, supporting and guiding means comprising a pair of flexible cables on opposite sides of said traveling boom, each of said cables having one portion secured to said traveling boom and another portion adjustably attached to said vehicle to accommodate movement of said traveling boom, whereby the interior surface of the pipe may be coated without any portion of said apparatus touching or contacting the inner surface of the pipe.
In apparatus for coating the interior surface of a pipe or the like, in combination, a mobile vehicle, a traveling boom reciprocally movable on said vehicle and adapted to be moved into and out of the pipe, adjustment means on said vehicle for varying the relative position of said traveling boom and bringing it into alignment with the longitudinal axis of the pipe, means on said vehicle for reciprocating and supporting said traveling boom for movement into and out of the pipe, said means for supporting said traveling boom being adapted to be always spaced from the interior surface of the pipe, and spraying means secured adjacent an end of said traveling boom, said spraying means comprising a plurality of discs rotatably mounted on said traveling boom, at least one of said discs forming a material receiving chamber, a plurality of spacers between said discs, said discs being held apart by said spacers to form at least one generally peripheral orifice communicating with said material receiving chamber, means for securing said spacers and discs together, means for rotating said discs, said means for rotating said discs being rotatable in opposite directions, and means for supplying coating material to said material receiving chamber, whereby upon rotation of said discs and supplying coating materials to said material receiving chamber the coating material is expelled through said peripheral orifice to coat the interior of the pipe and the interior surface of the pipe may be coated without any portion of said apparatus touching the inner surface of the pipe.
In apparatus for coating the interior surface of a vertical pipe or the like located in the ground, in combination, a mobile vehicle adapted to be located over the pipe, a traveling boom reciprocally movable on said vehicle, extending vertically from said vehicle, being adapted to be extended downwardly into the vertical opening of the pipe or the like and adapted to be moved into and out of the pipe, adjustment means on said vehicle for varying the relative position of said traveling boom and bringing it into alignment with the longitudinal axis of the pipe, means on said vehicle for reciprocating and supporting said traveling boom for movement into and out of the pipe, said means for supporting said traveling boom being adapted to be always spaced from the interior surface of the pipe, and spraying means secured adjacent an end of said traveling boom, said spraying means further including flexible means for securing said spraying means to said traveling boom and means for oscillating said spraying means out of a plane perpendicular to the longitudinal axis of said traveling boom, whereby the interior surface of the pipe may be coated without any portion of said apparatus touching the inner surface of the pipe.
In apparatus for coating the interior surface of a pipe or the like, in combination, a support frame adapted to be carried by a mobile vehicle, a cradle pivotally mounted on two axes on said support frame, a traveling boom movable relative to said cradle and adapted to be moved into and out of the pipe, bearing means on said cradle for said traveling boom, movement means on said support frame for varying the relative position of said cradle and to bring said traveling boom into alignment with the longitudinal axis of the pipe, means on said support frame for driving and supporting said traveling boom for movement into and out of the pipe, the last mentioned means at all times being spaced from the interior surface of the pipe, said driving and supporting means comprising a flexible cable secured to opposite ends of said traveling boom, and a driven pulley mounted on said cradle, a mediate portion of said flexible cable being wrapped around said pulley for driving and supporting said traveling boom and spraying means secured adjacent an end of said traveling boom, whereby the interior surface of the pipe may be coated without any portion of said apparatus touching the interior surface of the pipe.
Dependencies are inferred from the claim text.