Submerged double-discharging magnetic driving pump for conveying liquefied natural gas

Abstract

The invention provides a submerged double-discharging magnetic driving pump for conveying liquefied natural gas. The submerged double-discharging magnetic driving pump for conveying the liquefied natural gas comprises an external high vacuum heat insulation container which is that an evaporated gas outlet is formed in the upper part of one sidewall and while a liquefied natural gas inlet is formed in the lower part of the other sidewall, and an outer sealing cover is mounted on the top part through a flange; an internal high vacuum heat insulation container is mounted inside, and an inner sealing cover is mounted on the top part of the internal high vacuum heat insulation container through the flange; a liquefied natural gas outlet is formed in the center of the inner sealing cover; an impeller housing is fixed to the inner wall of the bottom part of the external high vacuum heat insulation container by axial supporting, and an impeller is mounted to the impeller housing through a central shaft; the upper part of the impeller housing is fastened to the bottom part of the internal high vacuum heat insulation container through a fastening part; a connecting seat is mounted in the impeller housing; a central shaft is mounted in the middle part of the connecting seat through a sliding bearing and extends into the internal high vacuum heat insulation container; a submerged double-discharging magnetic part is mounted at the central shaft. The submerged double-discharging magnetic driving pump is compact and reasonable in structure, convenient to operate, high in sealing performance, safe and reliable to use, and low in vibration noise.

Description

technical field [0001] The invention relates to the technical field of drive pumps, in particular to a submersible double-discharge magnetic drive pump for transporting liquefied natural gas. Background technique [0002] Natural gas is becoming more and more popular as a clean energy source. Many countries have listed liquefied natural gas (LNG) as the preferred fuel, and the proportion of natural gas in energy supply has increased rapidly. In recent years, global LNG production and trade have become increasingly active. LNG has become a scarce and clean resource and is becoming a new hot spot in the world's oil and gas industry. [0003] Liquefied natural gas is a cryogenic liquid, because the temperature of the cryogenic liquid is much lower than the ambient temperature, and it is usually in a saturated state. Under the action of heating under ambient conditions, the low-temperature liquid will be vaporized, and the amount of vaporization is proportional to the heat tran...

AI Technical Summary

Problems solved by technology

[0010] (3) The vibration during the operation of the pump for transporting liquefied natural gas affects the service life of the pump, and the noise generated pollutes the working environment and affects the physical and mental health of the operator

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