Variable-diameter low-temperature pipeline flange coating device and method
A technology of pipeline flange and covering device, which is applied in the direction of pipe components, pipes/pipe joints/pipe fittings, mechanical equipment, etc., can solve the problems of pipeline flange leakage, economic loss, increased safety risks, etc.
Pending Publication Date: 2021-09-14
国家管网集团(福建)应急维修有限责任公司
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Problems solved by technology
Under normal pressure, the temperature of liquefied natural gas is -162°C. Due to the late start of the use of domestic liquefied natural gas, due to the stress of pipelines in low temperature environments, it is easy to cause leakage of pipelines and / or flanges, especially during pre-cooling and production processes. , due to uneven heating, it is very easy to cause leakage of flanges and / or pipe welds. The current treatment measures are generally to stop production, replace the liquefied natural gas in the pipeline, and replace flange gaskets or pipes. This method of dealing with leakage is undoubtedly Caused certain economic losses, took a long time, and increased safety risks
In addition, the existing on-line plugging device can only be applied to pipelines of one diameter
Method used
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0028] see Figure 1 to Figure 5 As shown, on the one hand, a variable-diameter low-temperature pipeline flange coating device of the present invention includes a circular cylinder formed by pairing an upper coating cover 1 and a lower coating cover 2, and the circular cylinder surrounds The leaking flange 3 (in this embodiment, the leaking flange 3) that holds the leaking pipeline or the connecting end face of the two pipelines, the upper covering cover 1 and the lower covering cover 2 are fixedly connected by a connecting piece; it also includes: variable The upper part 4 of the diameter front flange, the lower part 5 of the variable diameter front flange, the upper part 6 of the variable diameter rear flange and the lower part 7 of the variab...
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The invention discloses a variable-diameter low-temperature pipeline flange coating device and method. The variable-diameter low-temperature pipeline flange coating device comprises a circular cylinder formed by splicing an upper coating cover and a lower coating cover. The variable-diameter low-temperature pipeline flange coating device comprises a variable-diameter front flange upper portion, a variable-diameter front flange lower portion, a variable-diameter rear flange upper portion and a variable-diameter rear flange lower portion. The variable-diameter front flange upper portion is connected with the front end of the upper coating cover; the variable-diameter front flange lower portion is connected with the front end of the lower coating cover; the variable-diameter rear flange upper portion is connected with the rear end of the upper coating cover; the variable-diameter rear flange lower portion is connected with the rear end of the lower coating cover; the variable-diameter front flange upper portion, the variable-diameter front flange lower portion, the variable-diameter rear flange upper portion and the variable-diameter rear flange lower portion are all provided with stuffing boxes with different pipe diameters, the stuffing boxes are filled with stuffing, stuffing glands are arranged outside the stuffing boxes, and the stuffing boxes are connected with pipelines to achieve sealing with the pipelines. On-line leaking stoppage for leakage of pipelines with different pipe diameters can be achieved through a variable-diameter flange.
Description
technical field [0001] The invention relates to the technical field of pipeline leakage plugging, in particular to a variable-diameter low-temperature pipeline flange coating device and method. Background technique [0002] As a low-temperature clean energy, liquefied natural gas is widely used in power generation, industrial production, and residential life. Under normal pressure, the temperature of liquefied natural gas is -162°C. Due to the late start of the use of domestic liquefied natural gas, due to the stress of pipelines in low temperature environments, it is easy to cause leakage of pipelines and / or flanges, especially during pre-cooling and production processes. , due to uneven heating, it is very easy to cause leakage of flanges and / or pipe welds. The current treatment measures are generally to stop production, replace the liquefied natural gas in the pipeline, and replace flange gaskets or pipes. This method of dealing with leakage is undoubtedly It caused cert...
Claims
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IPC IPC(8): F16L55/172
CPCF16L55/172
Inventor 王建国徐洪涛陈永忠李超平王萍卓海森王东洋杜怀林黄银辉黄祥耀莫少兵
Owner 国家管网集团(福建)应急维修有限责任公司