Abstract:
An apparatus for coating the internal surfaces of pipes comprises two pigs which engage against the internal pipe surfaces and are movable through the pipe, and which define an intermediate zone therebetween for receiving the coating material. A spraying device capable of spraying material in the radial direction is connected to the intermediate zone via a material feed line. Upon being drawn through the pipe, the coating material is fed to the spraying device which atomizes the material and conveys it to the internal surfaces of the pipe.
Abstract:
An assembly for connecting pipe lining machine to a device to be pulled through a pipeline or the like is provided in which a coiled connector spring is attached between the device to be pulled through the pipe and the lining machine. A keeper member fixed to the connector is designed to be removably connected to a cement lining machine while permitting relative rotation thereof.
Abstract:
An improved apparatus for maintaining the lance portion of a coating device accurately centered within the bore of a tubular conduit to be coated as the lance is moved axially through such bore. The tubular element of such coating lance is supported by a saddle which in turn is supported between two elongated skids which are respectively engageable with opposed top and bottom surfaces of the conduit bore. Radially projecting pins are respectively provided on each side of the saddle. Two pairs of expanding links are respectively pivotally mounted on each end of the saddle pins in an X configuration and one end of each link is pivotally connected to a pivot mounting bracket formed on one of the skids. The other ends of the expanding links are slidably engaged with the internal surfaces of the mounting brackets so that the expanding links may be moved from an essentially horizontal position, wherein the skids are collapsed adjacent to the lance supporting tubing, to a more upright position wherein the skids are radially expanded relative to the supporting tubing. Expansion and contraction of the links is respectively accomplished by actuating elements secured to the tubular portion of the lance in axially spaced relationship relative to the common pivot points of the expanding links. One such link actuator causes the links to collapse when the lance supporting tube is moved in one direction and the other link actuator causes the supporting links to pivot to their expanded position when the lance supporting tubing is moved in the opposite direction.
Abstract:
A method and apparatus for reinforcing and repairing piping are disclosed for forming a film on the inside of a pipe line. The apparatus includes a film forming device having spaced radially extending front and rear walls which is inserted within the pipe line. When so inserted, the apparatus and the inside surface of the pipe line define an annular space into which film forming material is introduced. This annular space can be used to staddle a cracked portion of the pipe line, a joint or other inadequately sealed areas in which leakage may occur. A film adjusting device comprising a rotary driving element and a rotary film adjusting element are provided and are flexibly connected to the film forming device. The rotary drive device includes a motor and spaced front and rear discs each of which is attached to a plurality of outwardly extending fragments. A hauling device is provided for moving both the film forming device and film adjusting device within the pipe line and an inspection device is provided to assist an operator in locating areas to which the film forming material must be carefully applied. The method comprises inserting the devices within a pipe line, moving them through the pipe line, applying film forming material to the inner surface of the pipe line and stopping the devices at potential leakage portions to properly reinforce these portions with film material.
Abstract:
A uniform, continuous layer of a drag reduction material is applied to the internal wall of a conduit by injecting into the conduit the material in liquid form via an apparatus capable of applying the liquid to the internal conduit wall. The apparatus supplies the liquid to the wall at a rate proportional to the rate of travel of the apparatus through the conduit. The drag reduction material may be injected into the conduit either prior to the injection of the apparatus or may be contained in a chamber within the apparatus.