An inspection system configured for “no-blow” use in a pressurized gas pipeline includes a push rod wound around a spool for convenient deployment and portability. A camera disposed on one end of the push rod is configured to relay images back to a monitor. A motor is configured for remote actuation
An inspection system configured for “no-blow” use in a pressurized gas pipeline includes a push rod wound around a spool for convenient deployment and portability. A camera disposed on one end of the push rod is configured to relay images back to a monitor. A motor is configured for remote actuation by an operator, and provides for self-propelled movement of the camera in the pipeline. An entry tube is configured for sealed entry into the pipeline to facilitate entry of the camera and push rod. A guide shoe at the end of the entry tube provides a smooth transition for the camera and push rod as it leaves the entry tube and enters the pipeline. An automatically deployable and retractable positioning system is used to keep the camera away from an interior surface of the pipeline, and in the case of smaller pipelines, centers the camera within the pipeline.
대표청구항▼
1. An inspection system for inspecting a pressurized gas pipeline that defines a first longitudinal axis, the inspection system comprising: an elongate flexible guide member;a conduit including a first end and a second end configured for insertion into the pipeline, the conduit having a cross sectio
1. An inspection system for inspecting a pressurized gas pipeline that defines a first longitudinal axis, the inspection system comprising: an elongate flexible guide member;a conduit including a first end and a second end configured for insertion into the pipeline, the conduit having a cross section with an outer width dimension and being configured to receive the guide member therein, thereby facilitating entry of the guide member into the pipeline;a transition member adjacent the second end of the conduit for facilitating a change in direction of the guide member as the guide member enters the pipeline from within the conduit, the transition member being configured to not extend beyond the outer width dimension of the conduit such that the conduit and transition member can be inserted into the pipeline using keyhole entry techniques; anda camera attached to the guide member and configured to pass through the conduit and into the pipeline. 2. The inspection system of claim 1, further comprising: a biasing member disposed between a first end of the guide member and the camera, the biasing member having a first end axially fixed relative to the first end of the guide member, and a second end axially movable relative to the first end of the guide member; andat least two flexible arms, each of the arms having a first end pivotally disposed proximate one of the ends of the camera, forming respective pivotal attachments, and a second end pivotally disposed proximate the second end of the biasing member, thereby facilitating automatic outward movement of a portion of each of the arms as the second end of the biasing member moves away from the first end of the biasing member when the arms exit the conduit into the pipeline interior, and further facilitating inward movement of a portion of each of the arms when the arms are retracted into the conduit, thereby causing a movement of the second end of the biasing member toward the first end of the biasing member. 3. The inspection system of claim 2, further comprising a support member disposed between the first end of the guide member and a first end of the camera for supporting the camera remotely from the first end of the guide member, thereby providing a distance between the first end of the guide member and the camera to facilitate use of the flexible arms. 4. The inspection system of claim 2, wherein the biasing member includes a coil spring, and the second end of each of the arms includes an aperture therethrough, the coil spring being disposed through each of the apertures, thereby forming the pivotal attachments between the biasing member and each of the arms. 5. The inspection system of claim 2, further comprising an adapter member configured for attachment to the first end of the guide member, and further configured to receive the first end of the biasing member, thereby axially fixing the first end of the biasing member relative to the first end of the guide member. 6. The inspection system of claim 1, wherein the cross section of the conduit is generally circular and the outer width dimension is an outer diameter of the conduit. 7. The inspection system of claim 1, further comprising a motor arrangement disposed proximate the first end of the conduit and operable to move the guide member through the conduit and into the pipeline. 8. The inspection system of claim 7, wherein the motor arrangement includes a motor and a pair of wheels driven by the motor and configured to capture the guide member therebetween, thereby pushing the guide member through the conduit and into the pipeline. 9. The inspection system of claim 7, the pressurized pipeline being selectively accessible through a valve system, and wherein the conduit is a first conduit, the inspection system further comprising a second conduit having first and second ends and configured to receive the first conduit therein, the first end of the second conduit being configured for attachment to the valve system, thereby facilitating entry of the first conduit into the pipeline through the valve system. 10. The inspection system of claim 9, further comprising a retaining structure disposed proximate the second end of the second conduit, the retaining structure being configured to secure the first conduit relative to the second conduit after the first conduit is moved through the second conduit and into the pipeline.
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