摘要:
A pig, in particular an inspection or cleaning pig, for passing through an elongate pipe (1) having a pipe wall, preferably a gas pipeline, said pig comprising at least one functional unit (2) for cleaning the pipe (1) and/or for gathering pipe information and comprising a plurality of magnets (13), and said pig having an eddy current-braking unit (3) formed by the magnets (13).
摘要:
The invention relates to a method for determining the flow or the flow rate of a medium in an electrically conductive object, in particular a pipe (1) or a pipeline, through which a medium flows. At least one ultrasonic wave (16) is produced by means of a transmitting transducer (11) in the object and is injected into the medium as a longitudinal wave (8) on an inner side of the object, and an ultrasonic signal, coming at least partially from the longitudinal wave (8), is received by the receiving transducer (12), at a spatial distance from the injection point and is used to evaluate the flow or the flow rate. Said transmitting transducer (11) produces, preferably in the absence of an acoustic coupling with the surface of the object, a first variable magnetic field in an area close to the surface of the object, in particular metallic, and a first ultrasonic wave is produced in said area by means of the interaction of said variable magnetic field with a static or quasi-static magnetic field. Said transmitting transducer (11) also produces an additional variable magnetic field in the area of the object and an additional ultrasonic wave is produced in said area by means of the interaction of the variable magnetic field with a static or quasi-static magnetic field, said other ultrasonic wave is superimposed on the first ultrasonic wave such that an amplitude of a resulting wave in the direction of the receiving transducer (12) is increased and is reduced in the direction away from said receiving transducer (12). Preferably, the first and the second magnetic fields are produced by two high frequency bobbins (18, 19) of the transmitting transducer (11). The invention also relates to a device for carrying out said inventive method.
摘要:
Pipe arrangement comprising two pipes and a sleeve (5), wherein both pipes have an outer metal wall (2), an inner, thermosensitive lining (1) of plastic and also end faces (3) facing towards one another and are connected to one another via the sleeve (5), which is arranged outside the pipes and is welded to at least one pipe, wherein an insulator (7) is integrated along a weld seam (6), which is spaced apart from the end face (3) of a first pipe in the longitudinal direction of the pipe and connects the sleeve (5) to said pipe, in the circumferential direction of the pipe and between the metal wall (2) and the lining (1), and process for producing a pipe arrangement, which is distinguished by the fact that the insulator (7) is applied to the inner side of the metal wall (2) of at least one pipe spaced apart from the end face (3) thereof, the latter is then integrated into the metal wall by introducing the lining (1) of the pipe, then this pipe is pushed into a sleeve (5) which is attached to a further pipe provided with a lining, and the sleeve (5) is welded to the metal wall (2) of the pipe along the insulator (7) and on the outside of the pipe.
摘要:
The invention relates to a security device for a cover device of a pipe and/or for a pipe, that can be used for producing pipelines having a series of further pipes welded to each other, wherein the cover device comprises a sleeve covering an inner wall of the pipe, and the security device is designed for generating an alarm signal, wherein the security device comprises a structure-borne sound detection device comprising a structure-borne sound sensor for detecting manipulation of the pipe. The invention further relates to a system for monitoring pipes having a plurality of security devices having a receiving station for receiving the security device signals, preferably repeatable by means of a repeater, and an electronic data processer designed for analyzing the signals and for outputting an alarm signal.