Deep-sea hydrothermal source investigation utilising water and gas samples to characterise ocean resources requires water sampler, both large and small volume. How to preserve the original captured samples in the sampler during its lifting process to the surface remains challenging. Our research develops a piston type deep-sea pressure equaliser installed in the sampling bottle to solve the pressure problems using pressure self-adaptive principle. This paper describes a new mathematic analysis of the pressure equaliser and carries out its numerical computation accordingly. Two different scenarios i.e. sampling water only and sampling water as well as gas, are selected to evaluate the performance of this pressure equaliser. The result shows that this pressure equaliser is capable of adjusting the pressure properly in the lifting process of the deep-sea water sampling bottle and thus helps to secure the sampling quality. Therefore, the design of pressure equaliser is acceptable.

中文翻译：

---

深海均压器的水动力分析

利用水样和气样表征海洋资源的深海热液源调查需要大体积和小体积的水取样器。如何在采样器提升到表面的过程中保留原始捕获的样本仍然具有挑战性。我公司研发了一种安装在采样瓶内的活塞式深海均压器，利用压力自适应原理解决压力问题。本文描述了一种新的压力均衡器的数学分析，并据此进行了数值计算。选择了两种不同的场景，即仅采样水和采样水和气体，以评估该压力均衡器的性能。结果表明，该压力均衡器能够在深海水采样瓶的提升过程中适当地调节压力，从而有助于保证采样质量。因此，压力平衡器的设计是可以接受的。