A space water tank liquid level indicator

Abstract

The invention discloses a space water tank fluid level indicator comprising a fastening bolt (1), an indicating mechanism end cover (2), a fluid level indicating tape (3), a centre shaft (4), a butterfly spring (5), a circular nut (6), a pressure spring (7), a hydraulic piece (8) and a pressure film (9). A middle convex structure is adopted at the position where the bottom of the hydraulic piece (8) contacts with the pressure film (9) to rapidly sense internal pressure changes of a water tank; the pressure spring (7) and the butterfly spring 5 are mounted on the centre shaft (4) to control pretension force of the hydraulic piece (8), the circular nut (6) is connectively fixed on the centre shaft (4) through a thread, and minimum water tank internal pressure values for pushing the hydraulic piece (8) to displace initially are controlled by controlling the pretension force of the pressure spring (7) through number of rotating circles of the circular nut (6). The space water tank fluid level indication can be completely isolated from internal fluid, water tank internal medium is prevented from being contaminated, indicating accuracy is high, repeated use is achieved, and displacement of the centre shaft is adjustable.

Description

technical field [0001] The invention relates to a liquid level indicator of a space water tank, which can be used in a microgravity environment. Background technique [0002] The space water tank needs to be refilled after the internal liquid is used up. However, it is difficult to use common ground methods such as measurement means or visual windows to know whether the interior is full of liquid under microgravity. The filling process is generally controlled at a low speed to avoid filling. Excessive volume will cause damage to the water tank. The liquid level indicator for long-term storage of drinking water tanks in space is one of the key components of the sub-system of space environmental control and life protection. [0003] The liquid level indicator of the existing space water tank uses three dyed ribbons to show whether the water tank is full of water or not. Since the inner bag of the water tank is made of Combitherm VPCXX140, the outer bag is made of double-layer...

AI Technical Summary

Problems solved by technology

The liquid level indicator adopts an elastic band structure. When the water tank is full, the internal pressure increases, resulting in an increase in the circumference of the water tank. The increase in circumference is displayed through the stretching and deformation of the elastic band structure, so the liquid level indicator on the water tank does not display. Sensitive, the weight of the water filled twice in the same water tank is quite different, and the display error of this liquid level indicator device is relatively large

In addition, with elastic band construction, it is easy to damage after repeated use

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