초록 ▼

A probe structure for inserting into and operating upon an object within a pipeline, especially a high pressure pipeline carrying liquid or gas, is characterized by two coaxial cylinders that can be either pneumatically or hydraulically actuated. A primary cylinder is adapted to be mounted onto a pi

A probe structure for inserting into and operating upon an object within a pipeline, especially a high pressure pipeline carrying liquid or gas, is characterized by two coaxial cylinders that can be either pneumatically or hydraulically actuated. A primary cylinder is adapted to be mounted onto a pipeline tee and/or valve, and includes a movable primary piston to which is fixedly attached a primary lower hollow shaft that moves with the primary piston and preferably a primary upper hollow shaft that also moves with the primary piston. The primary lower hollow shaft is adapted to selectively extend into the pipeline while the primary upper hollow shaft extends above the primary cylinder and is fixed to a secondary cylinder, such that the secondary cylinder moves with the primary piston. The secondary piston includes a secondary piston that moves independently of the first and second cylinders. A secondary hollow shaft is fixedly attached to the secondary piston and coaxially extends through the primary upper and lower hollow shaft, and a central bore in the primary piston, and is adapted to selectively extend into the pipeline. In this manner, an object attached to the primary lower hollow shaft may be inserted into the pipeline, while the secondary hollow shaft provides for a second operation to be performed on the object. Wires may extend through the secondary hollow shaft or air may be circulated therethrough for pneumatic purposes.

대표청구항 ▼

[ What is claimed is:] [1.] A pipeline insertion device adapted to be mounted to a pipeline, the insertion device comprising:a lower cylinder head;a first cylinder structure mounted on said lower cylinder head, said first cylinder structure defined by a first housing and having a first, axially mova

[ What is claimed is:] [1.] A pipeline insertion device adapted to be mounted to a pipeline, the insertion device comprising:a lower cylinder head;a first cylinder structure mounted on said lower cylinder head, said first cylinder structure defined by a first housing and having a first, axially movable piston within a first chamber defined by the first housing, the first piston having a bore therethrough, the first cylinder structure further having a first hollow shaft coupled to the first piston and movable therewith, the first hollow shaft adapted to extend beyond the first housing and into the pipeline upon selective movement of the first piston;a second cylinder structure defined by a second housing and having a second, axially movable piston within a second chamber defined by the second housing, the second cylinder structure coupled to the first piston by a second hollow shaft, the second cylinder structure having a third hollow shaft coupled to the second piston and extending beyond the second cylinder housing, the third hollow shaft further extending through the second hollow shaft, the piston bore, and the first hollow shaft, and adapted to extend beyond the first cylinder housing upon selective movement of the second piston; anda pipeline insertion element mounted on an end of said third hollow shaft opposite said second piston, for selective insertion of said third hollow shaft and said pipeline insertion element into the pipeline upon actuation of said first cylinder structure and said second cylinder structure.