Method and device for detecting and locating leaks in buried pipelines专利检索-里程计测量仪器和方法专利检索查询-专利查询网

Method and device for detecting and locating leaks in buried pipelines

阅读：300发布：2023-07-06

专利汇可以提供Method and device for detecting and locating leaks in buried pipelines专利检索，专利查询，专利分析的服务。并且A detection scraper piston which is moved with the flow of liquid transported by a pipeline is fitted with end cups defining an intermediate compartment within the pipeline bore, with an odometer for measuring the distance of travel and pressuresensing and measuring means. The method of leak detection consists in continuously measuring the displacement of the piston from a predetermined zero point as well as the difference between the pressure within the compartment and an intermediate pressure between those prevailing on the upstream and downstream sides of the piston.，下面是Method and device for detecting and locating leaks in buried pipelines专利的具体信息内容。

权利要求

1. A method for detecting and locating leaks in an underground pipeline for transporting liquid comprising the steps of: moving through the pipeline a piston which is carried by the liquid, continuously measuring the displacement of said piston from a predetermined point of origin, and continuously measuring and registering the difference between the pressure within an annular compartment defined by packing-rings applied against the pipeline wall and carried at the ends of said piston and a pressure of the average value between those pressures prevailing on the upstream and downstream sides of said piston.

2. A method according to claim 1 including the continuously recording pressure difference as a function of the distance of travel.

3. A method according to claim 1 including the recording at the same time the distance of travel and said pressure difference when said difference passes a predetermined threshold value.

4. A device for detecting and locating leaks in a buried pipeline for transporting liquid comprising: a piston, an odometer supported by said piston for measuring the distance traveled by the piston, packing rings applied against the pipeline wall defining an annular compartment within the pipeline, an open conduit extending through both ends of the leak detecting device, a first pressure inlet connected to the annular compartment and a second pressure inlet connected intermediate the ends of said conduit, and means contained in said piston connected to said first and second pressure inlet for measuring the difference between the pressure within said compartment and a pressure of average value between those pressures on the upstream side and downstream side of said piston.

5. A device according to claim 4, comprising a recorder for recording ariations in the pressure difference as a function of the distance of travel.

6. A device according to claim 4, wherein said measuring apparatus is responsive to the difference between the pressure within the compartment and the pressure at one point of a passage which connects the upstream side to the downstream side of the piston, said point being located intermediate with respect to the two ends of said passage.

7. A device according to claim 6, wherein said passage communicates with the compartment by means of a calibrated orifice.

8. A device according to claim 7, wherein said orifice is placed in proximity to the point of the passage in which the pressure is compared with the prevailing pressure within the compartment.

9. A device according to claim 6, wherein said point located intermediate with respect to the two ends of said passage is chosen within said passage at a location such that the pressure maintained therein is substantially equal to the mean value of pressures on the upstream side and downstream side of the piston.

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Method and device for detecting and locating leaks in buried pipelines

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