US 12,013,498 B1
Low-frequency acoustic wave generating device for detecting pipeline blockage
Huiyong Liang, Pizhou (CN); Jiafei Zhao, Dalian (CN); Xin Lv, Beijing (CN); Yongchen Song, Dalian (CN); Jiawei Chu, Anqing (CN); Shi Shen, Liaoyang (CN); Lei Yang, Dalian (CN); Xingyu Lu, Taiyuan (CN); Linan Zhao, Beipiao (CN); and Shuangqing Zhang, Hefei (CN)
Assigned to NINGBO INST. OF DALIAN UNIVERSITY OF TECHNOLOGY, Ningbo (CN); and DALIAN UNIVERSITY OF TECHNOLOGY, Dalian (CN)
Filed by Ningbo Institute of Dalian University of Technology, Ningbo (CN); and Dalian University of Technology, Dalian (CN)
Filed on Jan. 2, 2024, as Appl. No. 18/402,692.
Claims priority of application No. 202310216389.2 (CN), filed on Mar. 2, 2023.
Int. Cl. G01N 29/00 (2006.01); F17D 5/00 (2006.01); G01S 7/521 (2006.01); G01S 15/88 (2006.01)
CPC G01S 7/521 (2013.01) [F17D 5/005 (2013.01); G01S 15/88 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A low-frequency acoustic wave generating device, comprising: a sealing shell configured to be communicated with a pipeline, wherein a sealed pressure environment is formed inside the sealing shell, a low-frequency electroacoustic transducer is disposed inside the sealing shell, the low-frequency electroacoustic transducer is connected to a signal generator and is configured to transmit an acoustic wave into the pipeline;
wherein the sealing shell comprises a pressure-resistant shell and a connecting head, the pressure-resistant shell defines a sealing chamber with an opening, the connecting head defines a hollow structure and is communicated with the sealing chamber, an end of the connecting head is detachably connected to an end at the opening of the pressure-resistant shell, and another end of the connecting head extends out of the pressure-resistant shell and is configured to be communicated with the pipeline;
wherein the low-frequency electroacoustic transducer is disposed in the sealing chamber, and an acoustic emission end of the low-frequency electroacoustic transducer faces towards the hollow structure of the connecting head;
wherein the low-frequency electroacoustic transducer is connected to a signal generator through a wire, the wire extends out of the pressure-resistant shell, and a part of the wire passing through the pressure-resistant shell is sealed by a sealing mechanism; the sealing mechanism comprises a sealing plug, the sealing plug is detachably connected to the pressure-resistant shell, the sealing plug defines a wire threading hole communicated with the sealing chamber, and the wire extends from the wire threading hole; a perforated gasket sleeved on the wire is disposed in the wire threading hole, and the perforated gasket is in a squeezed state, thereby forming a sealed connection between the wire and the perforated gasket;
wherein the wire threading hole is in a stepped hole structure comprising a large diameter part and a small diameter part, the large diameter part is provided with a gasket upper end cover, and the perforated gasket is disposed in the large diameter part; a side of the perforated gasket abuts against the small diameter part, and another side of the perforated gasket abuts against the gasket upper end cover; the wire passes through the gasket upper end cover, the sealing plug is detachably connected to a pressure cap, and the pressure cap compresses the gasket upper end cover.