A gas filling and discharging device for deep-sea LIBS detection

Abstract

The present invention relates to the field of spectral analysis technology, and in particular to a gas filling and discharging device used in the field of deep-sea LIBS detection. The device includes a pressure chamber, an airbag, a piston and an exhaust mechanism, wherein the airbag is arranged in the pressure chamber, the exhaust mechanism is arranged at one end of the pressure chamber and connected to the airbag; the piston is arranged at the other end of the pressure chamber and is slidably connected to the inner wall of the pressure chamber; the other end of the pressure chamber is provided with a water inlet, so that seawater passes through the piston to give the airbag the water pressure of the current working depth. When the present invention works in a deep-sea high-pressure environment, only relatively low-pressure gas needs to be filled in the airbag, and the high-pressure seawater entering the water inlet pushes the piston so that the gas in the airbag reaches an extremely high pressure level, and the exhaust mechanism is used to discharge the high-pressure gas from the exhaust port, without the need to pre-fill the device with ultra-high-pressure gas, which greatly improves the ease of use, safety and life of the exhaust system.

Description

Technical Field

[0001] The present invention relates to the field of spectral analysis technology, and in particular to a gas filling and deflation device used in the field of deep-sea LIBS detection. Background Art

[0002] When performing laser induced breakdown spectroscopy (LIBS) analysis in a deep-sea environment, generating a stable airflow on the analysis optical path can greatly enhance the efficiency of the analysis and the accuracy of the results. However, in the high-pressure environment of the deep sea, it is very difficult to generate a stable gas environment. The pressure of the gas cylinder inflated on land is difficult to exceed the deep sea water pressure when working in the deep sea, resulting in the inability to discharge the gas and even seawater backflow. Even if a high-pressure gas cylinder is used for inflation, in the high-pressure deep-sea environment, only a very small part of the gas inside the high-pressure gas cylinder can be discharged, and the gas utilization rate is extremely low, which cannot meet the long-term, safe, and stable airflow requirements of LIBS analysis in the deep-sea high-pressure environment. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a gas filling and deflation device for use in the field of deep-sea LIBS detection, which can continuously and stably release gas in a deep-sea high-pressure water environment and can be used for deep-sea LIBS online detection.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides an inflation and deflation device for deep-sea LIBS detection, comprising a pressure chamber, an airbag, a piston and an exhaust mechanism, wherein the airbag is arranged in the pressure chamber, the exhaust mechanism is arranged at one end of the pressure chamber and connected to the airbag; the piston is arranged at the other end of the pressure chamber and is slidably connected to the inner wall of the pressure chamber; a water inlet is arranged at the other end of the pressure chamber, so that seawater can pass through the piston to give the airbag the water pressure of the current working depth.

[0006] A ventilation pipeline connected to the airbag is provided at one end of the pressure-resistant cabin, and an inflation valve is provided on the ventilation pipeline; the exhaust mechanism is connected to the ventilation pipeline.

[0007] The exhaust mechanism comprises an air pump and an exhaust pipe, wherein the air inlet of the air pump is connected to the ventilation pipeline, and the exhaust port of the air pump is connected to the exhaust pipe.

[0008] The other end of the pressure-resistant cabin is provided with a piston limiting mechanism.

[0009] The piston limiting mechanism includes a key, which is embedded in the inner wall of the pressure-resistant cabin and is used to axially limit the piston.

[0010] A guide ring is provided on the outer circumference of the piston, and the guide ring is slidably connected to the inner wall of the pressure-resistant cabin.

[0011] The material of the pressure-resistant cabin is titanium alloy, and the shape of the pressure-resistant cabin is a cylindrical structure.

[0012] The present invention has the following beneficial effects and advantages: the present invention provides an air filling and deflation device for deep-sea LIBS detection. When working in a deep-sea high-pressure environment, the airbag only needs to be filled with relatively low-pressure gas. The high-pressure seawater entering through the water inlet pushes the piston, so that the gas in the airbag reaches an extremely high pressure level. The high-pressure gas is discharged from the exhaust port using an air pump. There is no need to pre-fill the device with ultra-high-pressure gas, which greatly improves the ease of use, safety and life of the exhaust system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a gas filling and discharging device used in the field of deep-sea LIBS detection according to the present invention;

[0014] In the figure: 1 is a pressure cabin, 2 is an air bag, 3 is a piston, 4 is a guide ring, 5 is a key, 6 is an air pump, 7 is an inflation valve, 8 is a water inlet, and 9 is an exhaust pipe. DETAILED DESCRIPTION

[0015] In order to make the purpose, solution and beneficial effect of the present invention clearer, the present invention is further described in detail below in conjunction with examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The present invention is described in detail below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, the present invention provides an inflation and deflation device for deep-sea LIBS detection, comprising a pressure cabin 1, an airbag 2, a piston 3 and an exhaust mechanism, wherein the airbag 2 is arranged in the pressure cabin 1, and the airbag 2 is used to store a certain amount of working gas; the exhaust mechanism is arranged on the outside of one end of the pressure cabin 1 and is connected to the airbag 2, and the exhaust mechanism is used to stably release the gas; the piston 3 is arranged at the other end of the pressure cabin 1 and is slidably connected to the inner wall of the pressure cabin 1; a water inlet 8 is provided at the other end of the pressure cabin 1, and the water inlet 8 is used to balance the seawater pressure, so that the seawater passes through the piston 3 to give the airbag 2 the water pressure of the current working depth.

[0017] In the embodiment of the present invention, a ventilation pipeline connected to the airbag 2 is provided at one end of the pressure cabin 1, and an inflation valve 7 is provided on the ventilation pipeline; a relatively low-pressure working gas can be filled into the airbag 2 through the inflation valve 7 under normal pressure environment on land.

[0018] Specifically, the exhaust mechanism is connected to the ventilation pipeline. The exhaust mechanism includes an air pump 6 and an exhaust pipe 9, wherein the air inlet of the air pump 6 is connected to the ventilation pipeline, and the exhaust port of the air pump 6 is connected to the exhaust pipe 9. In the deep sea high pressure environment, the pressure chamber 1 can be freely expanded and contracted and the working gas can be released through the push of seawater, the piston 3 and the control of the air pump 6.

[0019] When the air pump 6 is working, it gives power to the gas in the air bag 2 to be discharged into the water. At the same time, the air pump 6 can stably control the displacement of the gas in the water. The air pump 6 can be replaced by any component with the function of driving and controlling the gas, such as a control valve, a driving motor for pushing the piston, a spring, etc.

[0020] Furthermore, a piston limiting mechanism is provided at the other end of the pressure-resistant cabin 1. The piston limiting mechanism includes a key 5, which is embedded on the inner wall of the pressure-resistant cabin 1 and is used to axially limit the piston 3 to prevent the piston 3 from popping out of the pressure-resistant cabin 1.

[0021] In the embodiment of the present invention, a guide ring 4 is provided on the outer circumference of the piston 3 , and the guide ring 4 is slidably connected to the inner wall of the pressure cabin 1 and can move freely inside the pressure cabin 1 .

[0022] In the embodiment of the present invention, the pressure cabin 1 has a cylindrical shape. The pressure cabin 1 is made of titanium alloy to prevent water corrosion and withstand high pressure. The pressure cabin 1 contains an airbag 2. Taking the volume of the airbag 2 as 6.3L as an example, the length of the pressure cabin is about 700mm and the cross-sectional diameter is about 200mm. If the working depth is 6000m and the working water pressure is about 60Mpa, the pressure resistance value of the airbag 2 should be higher than the working water pressure.

[0023] Before operation, at a standard atmospheric pressure on land and a room temperature of 30 degrees Celsius, 40Mpa gas is charged into the airbag 2 through the inflation valve 7. A piston 3 is provided inside the pressure-resistant cabin 1, and the piston 3 is used to support the airbag 2 to prevent the airbag 2 from bulging out of the water inlet 8 when inflating on land and causing damage to the airbag. The piston 3 is supported by a guide ring 4 and can move freely inside the pressure-resistant cabin 1. A key 5 is provided at the end of the pressure-resistant cabin 1 to prevent the piston 3 from popping out.

[0024] When working, the whole system sinks into the water together with the detection device. The water inlet 8 on the pressure-resistant cabin 1 allows the outside seawater to enter the cabin, the piston 3 and the pressure-resistant cabin 1 may not be airtight, and the seawater can simultaneously give the airbag 2 and the piston 3 the water pressure of the current working depth.

[0025] Specifically, taking the internal gas pressure of the airbag 2 as 40Mpa as an example, within a diving depth of 4000 meters, the internal air pressure in the airbag 2 is higher than the ambient water pressure at the air outlet. At this time, the working airflow can overflow actively, and the outlet flow rate can be controlled by the throttle valve on the air pump 6.

[0026] When the diving depth exceeds 4000 meters, the ambient water pressure is higher than 40Mpa. The airbag 2 is deformed more due to the pressure of seawater, and its internal pressure is equal to the seawater pressure at the current depth. The working airflow cannot overflow actively and needs to be given a certain amount of power by the air pump 6.

[0027] In a deep sea high pressure environment, taking a working depth of 6000 meters as an example, the ambient water pressure is 60Mpa and the temperature is about 4 degrees Celsius. Due to the presence of the water inlet 8, the airbag 2 is in a balanced state in the seawater, so only a very small power is required to discharge the gas. In this embodiment, the air pump 6 can be a diaphragm pump, whose working voltage is 24V, power consumption is not higher than 30 watts, and can provide a pressure of not less than 0.2Mpa, which is sufficient to discharge most of the gas into the seawater at a depth of 6000 meters. At this time, the displacement of the gas in the water can be stably controlled by controlling the power of the air pump 6 and the throttle valve.

[0028] The present invention provides a gas filling and discharging device for deep-sea LIBS detection, which can continuously and stably release gas in a deep-sea high-pressure water environment, and can be used for deep-sea LIBS online detection. The LIBS system is used for the excitation and collection of laser-induced breakdown spectroscopy signals, and the gas filling and discharging device is used to generate an underwater gas detection optical path. When working in a deep-sea high-pressure environment, the airbag only needs to be filled with relatively low-pressure gas, and the high-pressure seawater entering the water inlet is used to push the piston, so that the gas in the airbag reaches an extremely high pressure level, and the high-pressure gas is discharged from the exhaust port using an air pump, without the need to pre-fill the device with ultra-high-pressure gas, which greatly improves the ease of use, safety and life of the exhaust system. The device involved in the present invention can be widely used in the fields of marine mineral exploration, marine environmental monitoring, etc.

[0029] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural or functional transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas filling and deflation device for deep-sea LIBS detection, characterized in that: The invention comprises a pressure-resistant cabin (1), an airbag (2), a piston (3) and an exhaust mechanism, wherein the airbag (2) is arranged in the pressure-resistant cabin (1), the exhaust mechanism is arranged at one end of the pressure-resistant cabin (1) and is connected to the airbag (2); the piston (3) is arranged at the other end of the pressure-resistant cabin (1) and is slidably connected to the inner wall of the pressure-resistant cabin (1); a water inlet (8) is arranged at the other end of the pressure-resistant cabin (1), so that seawater passes through the piston (3) to give the airbag (2) the water pressure of the current working depth; One end of the pressure-resistant cabin (1) is provided with a ventilation pipeline connected to the airbag (2), and an inflation valve (7) is provided on the ventilation pipeline; the exhaust mechanism is connected to the ventilation pipeline; The exhaust mechanism comprises an air pump (6) and an exhaust pipe (9), wherein an air inlet of the air pump (6) is connected to the ventilation pipeline, and an exhaust port of the air pump (6) is connected to the exhaust pipe (9); The other end of the pressure-resistant cabin (1) is provided with a piston limiting mechanism.

2. The gas filling and discharging device for deep-sea LIBS detection according to claim 1, characterized in that: The piston limiting mechanism comprises a latch key (5) which is embedded in the inner wall of the pressure-resistant cabin (1) and is used to axially limit the piston (3).

3. The gas filling and discharging device for deep-sea LIBS detection according to claim 1, characterized in that: A guide ring (4) is provided on the outer circumference of the piston (3), and the guide ring (4) is slidably connected to the inner wall of the pressure-resistant cabin (1).

4. The gas filling and discharging device for deep-sea LIBS detection according to claim 1, characterized in that: The material of the pressure-resistant cabin (1) is titanium alloy, and the outer shape of the pressure-resistant cabin (1) is a cylindrical structure.

Images