Pipeline connecting structure and EVA production device using connecting structure

Abstract

The invention provides a connecting structure used for connecting a high-pressure pipeline and a low-pressure pipeline. The connecting structure comprises a low-pressure side connecting piece connected with the low-pressure pipeline and a high-pressure side connecting piece connected with the low-pressure side connecting piece. The high-pressure pipeline penetrates through the high-pressure side connecting piece and the low-pressure side connecting piece. A cavity is formed among the low-pressure side connecting piece, the high-pressure pipeline and the high-pressure side connecting piece, and filler is contained in the cavity. According to the connecting structure, welding-free sealed type connection between the high-pressure pipeline and the low-pressure pipeline is achieved, the connecting structure can bear large impact force, and therefore the connecting pieces and the low-pressure pipeline cannot be damaged, and the service life of the connecting pieces and the service life of the low-pressure pipeline are prolonged. In addition, the connecting structure is simple in structure, convenient to install, easy to maintain and low in investment cost. In addition, the invention also provides an EVA production device using the connecting structure.

Description

technical field [0001] The invention relates to the field of EVA production devices, in particular to a connection structure for connecting high-pressure pipelines and low-pressure pipelines and an EVA production device using the connection structure. Background technique [0002] In the high-pressure circulating gas unit of the EVA production plant, there are several pieces of high-pressure pipe bursting discs, the bursting pressure of which is 37.8MPaG. The highest point within the 20-meter radius of the low-pressure exhaust cylinder (that is, the range with the low-pressure exhaust cylinder as the center and 20m as the radius) is more than 3.5 meters. When the high-pressure rupture disc explodes, the instantaneous pressure on the pipe wall of the outlet pipe of the high-pressure rupture disc is very large, thereby generating a strong impact on the low-pressure exhaust cylinder. If a fixed method (such as welding or a fixed clip) is used to connect the outlet pipe of the ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of safe connection between the high-pressure bursting disc outlet pipe and the low-pressure exhaust cylinder and to ensure that the impact force generated when the bursting disc bursts will not cause damage to the connecting parts, the present invention provides a method for connecting high-pressure pipes and The connection structure of the low-pressure pipeline and the EVA production device using this connection structure

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