Self-sealing type deep-sea pressure-tight sampling control valve

Abstract

The invention relates to a self-sealing deep sea pressurize sampling control valve in the field of ocean technology apparatus. The apparatus comprises: a spring seat, a pre-compressed spring, an O-type sealed coil, a valve core rod, a valve body, a piston return spring, a piston, a spacing nut, a driving spring, a driving block, a cylinder and an end cover, wherein the valve core rod arranges an O-type sealed coil; the valve core rod, the pre-compressed spring and the spring seat are in turn positioned inside the valve body; the piston return spring is positioned on the outside of the piston; the piston is covered on the valve core rod; the spacing nut is positioned on the top of the valve core rod; one end of the cylinder is covered on the piston and the piston return spring and is connected with the valve body, while the other end arranges the driving spring, the driving block and the end cover.

Description

technical field [0001] The invention relates to a valve in the technical field of marine engineering, in particular to a self-sealing deep-sea pressure-holding sampling control valve. Background technique [0002] In order to carry out marine research, it is often necessary to collect fluid samples of specific underwater locations, specific environments, and specific components for analysis and research. In order to ensure the accuracy of analysis and research, it is usually required that the collected samples can maintain the original physical and chemical composition and state, such as purity, pressure holding, heat preservation, and phase state maintenance. For example, seabed hydrothermal fluid is a liquid ejected from fountains distributed on the ocean floor, generally located at a water depth of 1,000 to 6,000 meters. The chemical composition and microorganisms in this hydrothermal fluid have a significant impact on the origin of life and the mineralization of seafloor...

AI Technical Summary

Problems solved by technology

There are following three disadvantages in this common on-off valve driven by a motor: one, because it is driven by a motor, each sampler must be powered by a submersible and controlled separately. The interference seriously affects the sampling operation and takes up the resources of the submersible; secondly, due to the high pressure environment, the drive motor needs to be oil-filled and sealed, and a specific compensation mechanism must be used to balance the pressure difference between the inside and outside of the sealed cavity, which is technically complicated , the cost is high and the reliability is low; thirdly, since the pressure and sealing force of the valve against the valve port is determined by the torque of the motor, when maintaining pressure, as the water depth decreases, that is, the external pressure of the valve port decreases, If the internal pressure is much higher than the external pressure, the sealing force of the valve against the valve port will be reduced, thereby reducing the pressure maintaining effect and even leaking

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