Limit filling device of low-temperature liquids container and low-temperature liquids container

Abstract

The invention discloses a limit filling device of a low-temperature liquids container and a low-temperature liquids container. The limit filling device is arranged inside the low-temperature liquids container, and is composed of a guide cylinder with an inner cavity, a first through hole on the bottom, a plurality of outlets on the walls,: a cover body which is covered on the top of the guide cylinder and is provided with a second through hole for filling liquid. The device also comprises a plurality of small holes on the walls of the second through hole, and a floater that is kept in the inner cavity of the guide cylinder. Correspondingly, the invention further discloses a low-temperature liquid container provided with the above mentioned limit filling device. By adopting the invention, safety of filling process of the low-temperature liquids and continuous filling of the low-temperature liquids can be ensured. The invention can also avoid the spill of low-temperature liquids, save energy and protect environments.

Description

technical field [0001] The invention relates to the mechanical field, in particular to a limit filling device for a cryogenic liquid container and the cryogenic liquid container. Background technique [0002] Low-temperature media are commonly used in industry, such as liquid oxygen, liquid nitrogen, liquid argon, LNG (Liquefied Natural Gas, liquefied natural gas) and other low-temperature, so the current container containing cryogenic liquid usually consists of two layers of containers, the interlayer adopts vacuum insulation The form is used to reduce the heat leakage of the environment to the cryogenic liquid, so that the loss of the cryogenic liquid is kept low during storage and transportation. [0003] Due to the low temperature of cryogenic liquids, taking liquid nitrogen as an example, the working temperature is usually around -196°C. Due to its continuous vaporization during the filling process, the pressure inside the tank increases, such as figure 1 As shown, so ...

AI Technical Summary

Problems solved by technology

[0006] To sum up the above, the problems existing in the filling technology of the cryogenic liquid container of the cryogenic liquid are as follows: first, there is low-temperature gas emission during the filling process, causing environmental pollution and waste of the low-temperature liquid; second, when the filling process When the middle test is full, low-temperature liquid flows out, causing waste of low-temperature liquid and polluting the environment; third, during the filling process and after filling, the staff needs to concentrate on the operation and close the relevant valves in time, which is poor in humanization; fourth. , there is low-temperature steam and liquid discharge, which is not safe; fifth, if the full-measurement valve, that is, the liquid discharge valve is forgotten to open, it may cause overfilling, and if the safe liquid level of the low-temperature liquid container is exceeded, it may cause pressure and the danger of frying the tank

Therefore, the filling technology of the cryogenic liquid container of existing cryogenic liquid obviously has inconvenience and defect in actual use, so it is necessary to improve

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