Device and method for repairing expansion joint of gas pipeline
A technology for gas pipelines and expansion joints is applied in the field of repairing gas pipeline expansion joints, gas pipelines, and gas pipeline expansion joint repairing devices. Effect
Active Publication Date: 2012-07-18
WUHU XINXING DUCTILE IRON PIPES
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Problems solved by technology
The above schemes mainly have the following problems in the implementation: the sealing cover is welded when the gas pipeline is in operation, the gas in the pipeline leaks outward during the construction process, and the gas and the air in the sealing cover are mixed to a certain extent to reach the explosion limit concentration. Will explode when soldered
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[0030] Referring to the accompanying drawings, through the description of the embodiments, the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various parts, the function and working principle of each part, and the manufacturing process And the method of operation and use, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention.
[0031] like figure 1 The structure of the present invention expressed, the present invention is a gas pipeline expansion joint repair device, which is installed at the expansion joint 2 position on the gas pipeline 1, and is used to repair the expansion joint 2 that is damaged and causes gas leakage when it is running with gas. status to be repaired.
[0032] In order to improve the safety of gas pipeline expansion joi...
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The invention discloses a device for repairing an expansion joint of a gas pipeline, wherein, a sealing cover (3) is provided, the sealing cover (3) subsumes the expansion joint (2), a construction gap is arranged between the inner wall of the sealing cover (3) and the expansion joint, and the sealing cover (3) is provided with a manhole flange (4). The invention also discloses a method for repairing the expansion joint. By adopting the technical scheme, problems encountering during the repairing gas pipelines carrying gas when gas pipeline leaking happens are successfully solved. The repairing construction process has low technical requirements on welding personnel and the personnel with general welding qualification can carry out the construction. The device and the process can ensure the repair work of the pipeline carrying gas to be completely safe, avoid risks, simplify construction requirements and greatly reduce the cost.
Description
technical field [0001] The invention belongs to the technical field of metallurgical industrial production, and relates to gas pipelines in metallurgical production. More specifically, the invention relates to a gas pipeline expansion joint repair device. In addition, the invention also relates to a method for repairing expansion joints of gas pipelines. Background technique [0002] Because the gas pipeline expansion joint bears the axial stress of the pipeline, as the temperature of the pipeline changes, the expansion joint is repeatedly pulled up, and the expansion joint often leaks. Since iron and steel enterprises are production-integrated enterprises with strong production integration, there are few opportunities for the whole plant to stop production for maintenance. Once the gas pipeline expansion joint leaks, there is little chance to replace it. In addition, due to the thin wall of the stainless steel expansion joint, direct welding repair cannot be performed. D...
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IPC IPC(8): F16L55/168
Inventor 王桂生连献功赵和平陈孝柱胡泊
Owner WUHU XINXING DUCTILE IRON PIPES