Process and device for welding and cutting flammable-explosive medium pipeline in on-line mode
A flammable, explosive, cutting and welding technology, used in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., can solve problems such as economic losses and achieve the effect of avoiding production stoppages
Inactive Publication Date: 2011-11-02
中化珠海石化储运有限公司
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Problems solved by technology
[0002] For the flammable and explosive medium pipelines of petrochemical enterprises, in the process of technological upgrading and transformation, it is necessary to cut the steel pipelines to add tee joints or set holes to connect with other pipelines. The conventional method is to clean the pipelines and reach Hot work requires hot work to carry out construction. In general, enterprises have to stop production, and a large amount of water or other cleaning agents are needed to clean the materials in the pipeline. The shutdown and cleaning bring huge economic losses to the company, and additionally, sewage treatment costs and Environmental impacts such as emissions, so for petrochemical companies, how to improve the safety of pipe cutting with materials and the rapid and effective construction process are currently industry problems commonly faced by petrochemical companies. Research and development of online cutting and welding technologies for flammable and explosive pipes and devices, in order to avoid the above economic losses, it is necessary to create good economic and social benefits
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[0034] The inflammable and explosive medium pipeline online cutting and welding process of the present invention includes the following process steps:
[0035] 1), first, intercept the steel pipe 1 that needs to be operated and empty the material, so that the pipeline that needs to be processed is in an empty state;
[0036] 2), for the steel pipe 1 that needs to be cut and processed, inject inert gas (nitrogen) from the emptying point (not shown in the figure) of the steel pipe 1, so that the oxygen content in the steel pipe 1 is below 0.1%;
[0037] 3) if image 3 As shown, the annular rotary cutting device 2 is installed at the steel pipe 1 that needs to be cut and processed. When performing the annular cutting of the first cutting opening, firstly, the annular knife rest 21 is clamped on the steel pipe 1, locked by the bolt 25, and passed Adjust the positioning bolt 22 to make the ring knife holder 21 tightly hug the steel pipe 1 and be perpendicular to the steel pipe 1, ...
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The invention provides a process and a device for welding and cutting a flammable-explosive medium pipeline in an on-line mode. By adopting the processing process provided by the invention, a ring rotated cutting device is directly used for carrying out low-temperature cutting; and through adopting a double-disc stopper and a heat insulation cooing device, a pressure online detector and a temperature detector can perform real-time detection and monitoring in the cutting process to prevent the pipeline firing and explosion caused by spark and high temperature from happening. By adopting the technology processing steps and the stopper, the economic losses caused by the stopping and cleaning of fammable-explosive medium pipelines, as well as the production halts and cleaning of an enterprise can be integrally avoided and online technical transformation and promotion can be carried out.
Description
【Technical field】 [0001] The invention relates to the field of petrochemical engineering construction, in particular to a cutting and welding process and equipment for inflammable and explosive medium pipelines. 【Background technique】 [0002] For the flammable and explosive medium pipelines of petrochemical enterprises, in the process of technological upgrading and transformation, it is necessary to cut the steel pipelines to add tee joints or set holes to connect with other pipelines. The conventional method is to clean the pipelines and reach Hot work requires hot work to carry out construction. In general, enterprises have to stop production, and a large amount of water or other cleaning agents are needed to clean the materials in the pipeline. The shutdown and cleaning bring huge economic losses to the company, and additionally, sewage treatment costs and Environmental impacts such as emissions, so for petrochemical companies, how to improve the safety of pipe cutting w...
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IPC IPC(8): B23P15/00B23D21/04B23K37/00B23Q11/12
Inventor 张明牟向峰赵力军蒋志杰
Owner 中化珠海石化储运有限公司
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