Underwater in-situ gas analyzer suitable for deep sea extreme environment

Abstract

The invention discloses an underwater in-situ gas analyzer suitable for deep sea extreme environment, which comprises a pressure-resistant cabin body, the pressure-resistant cabin body comprises a main body cabin, a front end cover and a rear end cover are respectively mounted at two ends of the main body cabin, a fixed bracket is fixedly connected in the main body cabin, and a vacuum detection cavity, a primary vacuumizing pump and a secondary vacuumizing pump are mounted on the fixed bracket. The primary vacuumizing pump and the secondary vacuumizing pump are both communicated with the vacuum detection cavity, the vacuum detection cavity is communicated with a gas component analyzer, a vacuum air pressure detection device is installed on the vacuum detection cavity, and the underwater in-situ degassing device is communicated with the vacuum detection cavity through a pipeline. And the first-stage vacuumizing pump, the second-stage vacuumizing pump, the gas component analyzer and the vacuum air pressure detection device are electrically connected with the control circuit system. The device can stably and continuously work in a deep-sea high-pressure low-temperature environment, is convenient to disassemble, assemble, transport and maintain, and can be widely applied to extreme environments such as deep-sea hydrothermal liquid, cold springs and hydrogen-rich nozzles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater in-situ gas analyzer, in particular to an underwater in-situ gas analyzer suitable for deep-sea extreme environment. BACKGROUND

[0002] The dynamic release process of dissolved gases such as methane, hydrogen sulfide and carbon dioxide occurs in deep-sea extreme environments (such as hydrothermal vents, cold spring areas, and deep-sea trenches). The chemical composition and flux of these gases are key parameters for studying submarine geochemical cycles, extreme ecosystems and global climate change. However, the extreme conditions of deep-sea high pressure, low temperature and strong corrosion pose a serious challenge to underwater gas analysis technology. Traditional underwater gas detection relies on laboratory analysis after sampling, which has problems such as sample loss, volatile gas escape, and microbial metabolic interference, resulting in insufficient data reliability and timeliness. Therefore, it is an urgent need in the field of marine science and engineering to develop a gas analyzer that can be directly monitored in-situ, real-time and continuously in deep-sea environment. SUMMARY

[0003] The purpose of the present application is to provide an underwater in-situ gas analyzer suitable for deep-sea extreme environment, to solve the problems existing in the prior art and to solve the problem that the existing equipment cannot meet the safe operation in deep-sea extreme environment.

[0004] To achieve the above-mentioned purpose, the present application provides the following scheme: the present application provides an underwater in-situ gas analyzer suitable for deep-sea extreme environment, comprising:

[0005] The pressure-resistant cabin body comprises a main cabin, a front end cover and a rear end cover are respectively installed at both ends of the main cabin, the main cabin, the front end cover and the rear end cover are made of titanium alloy or high-strength stainless steel material, a fixed support is fixedly connected in the main cabin, a vacuum detection cavity, a first-stage vacuum pump and a second-stage vacuum pump are installed on the fixed support, the first-stage vacuum pump and the second-stage vacuum pump are in communication with the vacuum detection cavity, a gas component analyzer is in communication with the vacuum detection cavity, a vacuum air pressure detection device is installed on the vacuum detection cavity, a watertight connector and an underwater in-situ degassing device are installed on the front end cover, the underwater in-situ degassing device is in communication with the vacuum detection cavity through a pipeline, the first-stage vacuum pump, the second-stage vacuum pump, the gas component analyzer and the vacuum air pressure detection device are electrically connected with a control circuit system, and the first-stage vacuum pump, the second-stage vacuum pump, the gas component analyzer, the vacuum air pressure detection device and the control circuit system are electrically connected with the multi-voltage output power module.

[0006] Preferably, the control circuit system comprises an industrial computer, a network switch, a temperature management and data acquisition processing unit.

[0007] Preferably, the in-situ degassing device has a fluid inlet and a gas sample outlet, which is in communication with the pipeline.

[0008] The present application has the following technical effects: the present application has good field adaptability and detection capability, and realizes faithful detection of gas components in deep sea extreme environment. The gas analyzer can detect H2, CH4, CO2, H2S and other gases in-situ and online without sample extraction or processing, can maintain the original state of the target environment, and can work stably and continuously in deep sea high pressure and low temperature environment by the corrosion-resistant titanium alloy shell combined with the sealing design. The gas analyzer has a modular structure, is convenient to disassemble, transport and maintain, and can be widely applied to deep sea hydrothermal, cold spring, hydrogen-rich jet and other extreme environments. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0010] Figure 1 It is an external appearance schematic diagram of the in-situ gas analyzer suitable for deep sea extreme environment of the present application.

[0011] Figure 2 It is an internal structure schematic diagram of the present application.

[0012] Figure 3 It is an internal structure schematic diagram of the present application. Figure 1

[0013] Figure 4 It is an internal structure schematic diagram of the present application. Figure 2

[0014] Wherein, 1, main cabin; 2, front end cover; 3, rear end cover; 4, vacuum detection cavity; 5, primary vacuum pump; 6, secondary vacuum pump; 7, gas component analyzer; 8, vacuum air pressure detection device; 9, watertight connector; 10, in-situ degassing device; 11, industrial computer; 12, network switch; 13, pipeline; 14, fluid inlet; 15, gas sample outlet. DETAILED DESCRIPTION

[0015] ​​The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0017] With reference to Figures 1-4 The present application provides an underwater in-situ gas analyzer suitable for deep-sea extreme environment, comprising:

[0018] The pressure-resistant cabin body comprises a main cabin 1, front and rear end covers 2 and 3 are respectively installed at two ends of the main cabin 1, a fixed support is fixedly connected in the main cabin 1, a vacuum detection cavity 4, a first-stage vacuum pump 5 and a second-stage vacuum pump 6 are installed on the fixed support, the first-stage vacuum pump 5 and the second-stage vacuum pump 6 are both communicated with the vacuum detection cavity 4, a gas component analyzer 7 is communicated with the vacuum detection cavity 4, a vacuum air pressure detection device 8 is installed on the vacuum detection cavity 4, a watertight connector 9 and an underwater in-situ degassing device 10 are installed on the front end cover 2, the underwater in-situ degassing device 10 is communicated with the vacuum detection cavity 4 through a pipeline 13, the first-stage vacuum pump 5, the second-stage vacuum pump 6, the gas component analyzer 7 and the vacuum air pressure detection device 8 are electrically connected with a control circuit system, and the first-stage vacuum pump 5, the second-stage vacuum pump 6, the gas component analyzer 7, the vacuum air pressure detection device 8 and the control circuit system are electrically connected with a multi-voltage output power module.

[0019] In the device, the main cabin 1 is made of titanium alloy or high-strength stainless steel material and has a cylindrical structure, has strong pressure resistance and can withstand deep-sea pressure; the pressure-resistant front end cover 2 and the pressure-resistant rear end cover 2 are matched with the pressure-resistant main cabin 1 through O-ring sealing grooves to realize equipment sealing under deep-sea high pressure; the first-stage vacuum pump 5 is a mechanical diaphragm pump, the second-stage vacuum pump 6 is a molecular pump, the vacuum air pressure detection device can measure the air pressure value in the vacuum detection cavity in real time and send the air pressure data through a network interface, the multi-voltage output power module is responsible for internal equipment power supply and provides stable 24V, 12V and 5V power supply for the internal equipment, the watertight connector 9 is installed on the pressure-resistant front end cover and connected with a manned submersible HOV and an unmanned remote control submersible ROV through a watertight cable to realize equipment power supply and communication, and the underwater in-situ degassing device 10 extracts dissolved gas in underwater in-situ fluid through nano-porous membrane adsorption / desorption and enters the measured gas into the vacuum detection cavity through the pipeline.

[0020] Further optimization scheme, the control circuit system includes industrial computer 11, network switch 12, temperature management and data acquisition processing unit.

[0021] Further optimization scheme, the underwater in-situ degassing device 10 has a fluid sample inlet 14 and a gas sample outlet 15, and the gas sample outlet 15 is communicated with the pipeline 13.

[0022] Workflow:

[0023] After the device is powered on, the primary vacuum pump 5 starts to work, and the vacuum pressure detection device 8 detects the air pressure in the vacuum detection cavity 4, when the air-liquid in the vacuum detection cavity 4 is extracted to the critical value, the secondary vacuum pump 6 starts to work, and the air pressure in the vacuum detection cavity is extracted to 1*10^-4 mbar and maintained; at this time, the underwater in-situ degassing device 10 starts to work, separates the dissolved gas in the deep-sea in-situ fluid through the nano-porous membrane, and the sample gas enters the vacuum detection cavity, and the gas component analyzer 7 performs synchronous analysis on the gas components, and sends the gas component data through the network.

[0024] The application has been tested and applied in multiple deep-sea extreme environments, and has good field adaptability and detection capability. The gas analyzer can realize the faithful detection of gas components in deep-sea extreme environments, and can detect H2, CH4, CO2, H2S and other gases in-situ and online without sample extraction or processing, and can maintain the original state of the target environment. The corrosion-resistant titanium alloy shell combined with the sealing design enables the device to work stably and continuously in the deep-sea high-pressure and low-temperature environment. The gas analyzer adopts a modular structure, which is convenient for disassembly, transportation and maintenance, and can be widely applied in deep-sea hydrothermal, cold spring, hydrogen-rich jet and other extreme environments.

[0025] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0026] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. An underwater in-situ gas analyzer suitable for deep-sea extreme environments, characterized in that, Include: Pressure cabin body, the pressure cabin body includes main body cabin (1), the front end cover (2) and the rear end cover (3) are installed respectively at both ends of main body cabin (1), main body cabin (1), the front end cover (2) and the rear end cover (3) are all used titanium alloy or high-strength stainless steel material, fixedly connected with fixed support in main body cabin (1), vacuum detection cavity (4), primary vacuum pump (5) and secondary vacuum pump (6) are installed on the fixed support, primary vacuum pump (5) and secondary vacuum pump (6) are all in communication with vacuum detection cavity (4), gas component analyzer (7) is communicated in vacuum detection cavity (4), vacuum air pressure detection device (8) is installed on vacuum detection cavity (4), watertight connector (9) and underwater in situ degassing device (10) are installed on the front end cover (2), underwater in situ degassing device (10) is communicated with vacuum detection cavity (4) through pipeline (13), primary vacuum pump (5), secondary vacuum pump (6), gas component analyzer (7) and vacuum air pressure detection device (8) are electrically connected with control circuit system, primary vacuum pump (5), secondary vacuum pump (6), gas component analyzer (7), vacuum air pressure detection device (8) and control circuit system are electrically connected with the multiple voltage output power module.

2. The in-situ underwater gas analyzer suitable for deep-sea extreme environment according to claim 1, characterized in that: The control circuit system includes industrial computer (11), network switch (12), temperature management and data acquisition processing unit.

3. The in-situ underwater gas analyzer suitable for deep-sea extreme environment according to claim 1, characterized in that: The underwater in situ degassing device (10) has a fluid inlet (14) and a gas sample outlet (15), the gas sample outlet (15) is communicated with the pipeline (13).

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