Static-conducting connecting structure of coupling for double-layered pipes

Abstract

The invention discloses a static-conducting connecting structure of a coupling for double-layered pipes, and relates to the technical field of pipe connection. The structure comprises an outer connecting pipe and an inner connecting pipe which are both straight pipes. The two end ports of the inner connecting pipe are internally provided with tubular inserts correspondingly. One ends of the inserts are sleeved with the inner connecting pipe in a sealed mode, and the other ends of the insert are sleeved with inner oil conveying pipe bodies. The inner oil conveying pipe bodies are sleeved with outer oil conveying pipe bodies. The two ends of the outer connecting pipe are sleeved with connecting sleeves correspondingly. The connecting sleeves are used for enabling the outer connecting pipe and the outer oil conveying pipe bodies at the corresponding ends to be integrated in a sealed mode. The inner wall of the inner connecting pipe is coated with a second static conductor layer which is connected with the inserts in the two end ports of the inner connecting pipe at the same time. According to the static-conducting connecting structure, through the inserts arranged in the both end ports of the inner connecting pipe, and the second static conductor layer, first static-conducting layers of the inner oil conveying pipe bodies are connected, and it is guaranteed that good static-conducting performance is achieved between oil conveying pipes.

Description

technical field [0001] The invention relates to the technical field of pipe connection, in particular to a static conductive connection structure of a double-layer pipe fitting joint. Background technique [0002] There are two main types of buried oil pipelines in existing gas stations, one is traditional seamless steel pipes, which have the problem of corrosion, perforation and oil leakage, which not only affects the purity of gasoline, pollutes groundwater sources, but may also cause safety accidents; the other One is the plastic multi-layer composite pipe, which is designed with static dissipative layers and barrier layers from the inner wall to the outside, so that the pipes have excellent corrosion resistance, anti-penetration and static dissipative properties, which is a safe and environmentally friendly Friendly plumbing product. [0003] However, this type of static conductive multi-layer composite pipe is not equipped with a special connector, especially at the ri...

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Problems solved by technology

[0002] There are two main types of buried oil pipelines in existing gas stations, one is traditional seamless steel pipes, which have the problem of corrosion, perforation and oil leakage, which not only affects the purity of gasoline, pollutes groundwater sources, but may also cause safety accidents; the other One is the plastic multi-layer composite pipe, which is designed with static dissipative layers and barrier layers from the inner wall to the outside, so that the pipes have excellent corrosion resistance, anti-penetration and static dissipative properties, which is a safe and environmentally friendly friendly plumbing products

[0003] However, this type of static conductive multi-layer composite pipe is not equipped with a special connector, especially at the right-angle corner, it is directly bent forcibly, causing damage to the pipe and affecting the safe use of the pipe; Layer pipe transportation has the defects of poor corrosion resistance and leakage resistance, and it is not convenient for oil leakage detection. Therefore, the use of double-layer pipeline transportation can ensure the safe and reliable transportation of pipelines. However, no double-layer static electricity conducting Connection structure of pipe fittings

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