Abstract: The embodiment of the present disclosure provides a recovery device for oil spilling on water, a control method thereof, and a recovery vessel. The recovery device includes a casing, a control center, a variable pressure airbag, an oil detector, an isolation layer, a water suction pump, and a drain pipe. The casing is of a hollow structure, the hollow structure is used to accommodate an oil-water mixture and used as a temporary oil collection tank, the upper part of the casing is provided with an oil-water mixture inlet, the bottom of the casing is provided with a drain port, and the side wall of the casting is provided with an oil suction port. The variable pressure airbag is arranged outside the casing, and the variable pressure airbag is configured to adjust buoyancy of the recovery device. The water suction pump is configured to pump out water in the casing and discharge water to a water environment outside the casing through the drain pipe.

Abstract: The embodiments of the present disclosure provide a detachable anti-vibration sealing protection device for a pipe flange. The protection device includes a casing, wherein left and right end surfaces of the casing have through holes for the pipeline to pass through, and the casing has an accommodation cavity for placing the flange; a first shock absorption assembly for radial shock absorption of the flange; and a second shock absorption assembly which is installed in a one-to-one correspondence with the flange and is configured for axial shock absorption of the corresponding flange. The first shock absorption assembly and the second shock absorption assembly are installed in the accommodation cavity.

Abstract: The present disclosure relates to a device and a method for pipeline leakage detection. The device for pipeline leakage detection includes a metal powder storage box, a plurality of ribs, and a signal collection and processing device. The metal powder storage box is ring-shaped and made of insulating material, which is configured to be sleeved on a pipeline. Metal powder is stored inside of the metal powder storage box, and inner and outer peripheral walls of the metal powder storage box are of mesh structure, which allows the metal powder to be ejected from the metal powder storage box under the push of leakage fluid of the pipeline. The plurality of ribs are made of insulating material, which are distributed evenly along an outer peripheral wall of the metal powder storage box, and fixed on the metal powder storage box respectively, and a plurality of coils arranged in a layer are configured inside the plurality of ribs.

Abstract: A sea surface oil recovery device is provided, which comprises a storage cabin, an oil-water separation system and an oil-water collection system arranged on the storage cabin. The storage cabin is provided with an oil storage cabin, a water storage cabin, a separation cabin and a gas storage cabin which are separated from each other, and the storage cabin is provided with a water pipe for connecting the water storage cabin with the outside of the storage cabin. The oil-water separation system comprises a molecular semipermeable membrane for separating oil and water and a water suction pipe, wherein the molecular semipermeable membrane is arranged between the separation cabin and the water storage tank and connects the separation cabin with the water storage tank; the water suction pipe is arranged between the oil storage cabin and the separation cabin and connects the oil storage tank with each other.

Abstract: The embodiments of the present disclosure provide a method and a system for leakage analysis of an urban pipeline, and a storage medium. The method includes: obtaining sample signal data of an original signal and a corresponding first waveform diagram; obtaining at least two first components and a second component by processing the sample signal data based on preset iteration operations; determining a mutual information entropy of two adjacent first components in the at least two first components; determining high-frequency signal data of the original signal based on the mutual information entropy; determining an effective characteristic signal and a corresponding second waveform diagram based on the high-frequency signal data and the sample signal data; determining whether the urban pipeline leaks based on the second waveform diagram; and in response to that the urban pipeline leaks, determining a leakage aperture of the urban pipeline based on the effective characteristic signal.

Abstract: The embodiments of the present disclosure provide an adaptive sealing device for pipeline porous leakage. The device includes a pressure protection device and an encircling sealing rubber cover. The pressure protection device is used to pressurize and seal the pipeline based on the encircling sealing rubber cover. The device further includes a control mechanism connected with the pressure protection device for adjusting the sealing pressure of the pressure protection device on the pipeline. The device further includes an anti-retraction mechanism connected with the pressure protection device and the control mechanism for limiting the pressure protection device and/or the control mechanism.

Abstract: The embodiments of the present disclosure provide a detachable anti-vibration sealing protection device for a pipe flange. The protection device includes a casing, wherein left and right end surfaces of the casing have through holes for the pipeline to pass through, and the casing has an accommodation cavity for placing the flange; a first shock absorption assembly for radial shock absorption of the flange; and a second shock absorption assembly which is installed in a one-to-one correspondence with the flange and is configured for axial shock absorption of the corresponding flange. The first shock absorption assembly and the second shock absorption assembly are installed in the accommodation cavity.

Abstract: A sea surface oil recovery device is provided, which comprises a storage cabin, an oil-water separation system and an oil-water collection system arranged on the storage cabin. The storage cabin is provided with an oil storage cabin, a water storage cabin, a separation cabin and a gas storage cabin which are separated from each other, and the storage cabin is provided with a water pipe for connecting the water storage cabin with the outside of the storage cabin. The oil-water separation system comprises a molecular semipermeable membrane for separating oil and water and a water suction pipe, wherein the molecular semipermeable membrane is arranged between the separation cabin and the water storage tank and connects the separation cabin with the water storage tank; the water suction pipe is arranged between the oil storage cabin and the separation cabin and connects the oil storage tank with each other.

Abstract: Disclosed is an urban non-metallic pipeline leakage location method, the method comprise the following steps: determining whether leakage occurs in a pipeline through numerical simulation law analysis or a Markov chain-based flow analysis method; for a leaking pipeline, establishing an inverse-transient control equation for non-metallic pipeline gas leakage, and obtaining pressure and flow rate data of each measuring point in different periods of time through experiments and substituting the data into the control equation to analyze experimental data; and defining a nonlinear programming problem of an objective function with a least squares criterion, and applying a sequential quadratic programming method to minimize the objective function, so as to determine the size and position of the leakage.

Abstract: Disclosed is an urban non-metallic pipeline leakage location method, the method comprise the following steps: determining whether leakage occurs in a pipeline through numerical simulation law analysis or a Markov chain-based flow analysis method; for a leaking pipeline, establishing an inverse-transient control equation for non-metallic pipeline gas leakage, and obtaining pressure and flow rate data of each measuring point in different periods of time through experiments and substituting the data into the control equation to analyze experimental data; and defining a nonlinear programming problem of an objective function with a least squares criterion, and applying a sequential quadratic programming method to minimize the objective function, so as to determine the size and position of the leakage.