| 摘要 |
<p>A leak detection apparatus and detection head for use in such apparatus is described. The apparatus comprises a pressurisible fluid cavity; pipe means; a detection head; a drive path fluid inlet for providing fluid to a drive path; a head path fluid inlet connected by said pipe means to said detection head along a head path and a fluid outlet for connection to a leaking pipe, through which said drive path passes wherein, in operation; said fluid outlet is connected to a leaking pipe; fluid is provided to both said paths, fluid in said head path passes along said pipe means and fills said detection head to a desired head pressure,fluid in said drive path pressurises said fluid cavity to a desired pressure, once said cavity is pressurised said fluid exits via said fluid outlet and said drive pressure pulls said pipe means out of said pressurised cavity and pushes said pressurised detection head down said leaking pipe. The detection head for use in leak detection and/or pipeline analysis apparatus comprises; a front region, a hollow rear end region and a flexible hollow central portion between said front and rear regions, wherein when fluid is introduced into said detection head via said rear region, to apply pressure to said head, said central portion expands radially outwards.</p> |
