Underwater total dissolved gas measuring device

Abstract

The utility model provides an underwater total dissolved gas measuring device which comprises a gas inlet support part and a measuring part, the gas inlet support part is matched with the measuring part, the gas inlet support part comprises a waterproof gas inlet film and a structural support, and the waterproof gas inlet film is arranged on one side of the gas inlet support part; the measuring part comprises a sealing plate, a gas inlet pipe, an aspirator, a condenser, a flow meter, a polymer filtering membrane, a carbon oxide analyzer, a nitrogen oxide converter, a nitrogen oxide analyzer, a zirconium oxide analyzer and a gas tank; the gas inlet pipe is arranged close to the sealing plate, the aspirator is connected with the gas inlet pipe, various gases which are totally dissolved underwater can be measured and monitored by integrating various gas analyzers, more to-be-measured gases enter the measuring part by adopting an expanded polytetrafluoroethylene film, and the measurement accuracy is improved. The sealing plate, the measuring part and the air inlet support part are connected in various modes to improve the leakproofness of the device.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental monitoring field, concretely relates to underwater total dissolved gas measuring device. BACKGROUND

[0002] The composition and content change of underwater total dissolved gas can be used as an important index of water pollution, mainly including the monitoring and measurement of oxygen, nitrogen oxide, carbon oxide, sulfur dioxide and other gases. For example, when the water body is polluted by organic pollutants, the decomposition of these pollutants by microorganisms in water will consume a large amount of oxygen, resulting in a sharp decrease in the oxygen content in total dissolved gas, and at the same time, some other gases such as methane, ammonia, nitrogen oxide and carbon oxide may be produced. By monitoring and measuring total dissolved gas, whether the water body is polluted and the type and degree of pollution can be roughly judged.

[0003] Some problems will occur when using the measuring device, for example: multiple gas measuring devices are required for measuring multiple gases, which is high in cost and complicated to operate; the gas permeable membrane blocks the entry of part of the gas while separating water, resulting in inaccurate measurement data; the poor sealing of the measuring device causes the internal components to be damaged due to water leakage, resulting in inaccurate data. UTILITY MODEL CONTENT

[0004] The utility model discloses a underwater total dissolved gas measuring device, by the integration of multiple gas analyzers, the underwater total dissolved multiple gases can be measured and monitored, and the bulk polytetrafluoroethylene membrane is adopted to make more to be measured gas enter the measuring part, a plurality of connecting modes are adopted between the sealing plate, the measuring part and the air inlet support part to improve the sealing of the device.

[0005] To achieve the above object, the utility model adopts the following technical scheme.

[0006] The underwater total dissolved gas measuring device comprises an air inlet support part and a measuring part, the air inlet support part is matched with the measuring part, the air inlet support part comprises a water separation air inlet membrane and a structure support, the water separation air inlet membrane is arranged on one side of the air inlet support part; the measuring part comprises a sealing plate, an air inlet pipe, a gas suction device, a condenser, a flowmeter, a high molecular filter membrane, a carbon oxide analyzer, a nitrogen oxide converter, a nitrogen oxide analyzer, a zirconium oxide analyzer and a gas tank; the air inlet pipe is arranged close to the sealing plate, the gas suction device is connected with the air inlet pipe, the condenser is connected with the gas suction device, the flowmeter is connected with the condenser, the high molecular filter membrane is arranged between the flowmeter and the carbon oxide analyzer, the carbon oxide analyzer is connected with the nitrogen oxide converter, the high molecular filter membrane is arranged between the nitrogen oxide converter and the nitrogen oxide analyzer, the nitrogen oxide analyzer is connected with the zirconium oxide analyzer, and the gas tank is connected with the flowmeter.

[0007] Further, the water-isolating air inlet film adopts an expanded polytetrafluoroethylene piece.

[0008] Further, the air inlet support part and the measuring part are connected in a buckling manner.

[0009] Further, the sealing plate and the measuring part are connected in a threaded connection manner.

[0010] Further, the air inlet pipe is arranged on one side close to the air inlet support part.

[0011] Further, the high-molecular filter film adopts a polytetrafluoroethylene piece.

[0012] Further, the carbon oxide analyzer is arranged on one side away from the air inlet support part.

[0013] Further, the zirconium oxide analyzer is arranged on one side away from the air inlet support part.

[0014] Further, the structure support is equally arranged inside the air inlet support part.

[0015] Further, the structure support adopts a metal piece.

[0016] The positive effect of the underwater total dissolved gas measuring device is:

[0017] The underwater total dissolved gas measuring device can measure and monitor various gases dissolved in water by integrating various gas analyzers, and the expanded polytetrafluoroethylene film is used to allow more to-be-measured gases to enter the measuring part, and various connection modes are used between the sealing plate, the measuring part and the air inlet support part to improve the air tightness of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram provided by the embodiment of the utility model.

[0019] The numbers in the figure are respectively:

[0020] 1, water-isolating air inlet film; 2, structure support; 3, sealing plate; 4, air inlet pipe; 5, air suction device; 6, condenser; 7, flow meter; 8, high-molecular filter film; 9, carbon oxide analyzer; 10, nitrogen oxide converter; 11, nitrogen oxide analyzer; 12, zirconium oxide analyzer; 13, gas tank. DETAILED DESCRIPTION

[0021] The following detailed description of the underwater total dissolved gas measuring device of the present application is given with reference to the accompanying drawings, but it should be noted that the detailed description is not intended to limit the specific implementation of the present application. Any similar structure and its similar changes that use the present application shall be included in the protection scope of the present application. The following embodiment is described with reference to the accompanying drawings to illustrate the specific embodiments of the present application. The directions mentioned in the embodiment, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only the directions of the accompanying drawings. Therefore, the directions used are used to explain and understand the present application, not to limit the present application.

[0022] Referring to Figure 1 The underwater total dissolved gas measuring device comprises an air inlet support part and a measuring part, the air inlet support part is matched with the measuring part, the air inlet support part comprises a waterproof air inlet film 1 and a structure support 2, the waterproof air inlet film 1 is arranged on one side of the air inlet support part; the measuring part comprises a sealing plate 3, an air inlet pipe 4, an air suction device 5, a condenser 6, a flow meter 7, a high molecular filter film 8, a carbon oxide analyzer 9, a nitrogen oxide converter 10, a nitrogen oxide analyzer 11, a zirconium oxide analyzer 12 and a gas tank 13; the air inlet pipe 4 is arranged close to the sealing plate 3, the air suction device 5 is connected with the air inlet pipe 4, the condenser 6 is connected with the air suction device 5, the flow meter 7 is connected with the condenser 6, the high molecular filter film 8 is arranged between the flow meter 7 and the carbon oxide analyzer 9, the carbon oxide analyzer 9 is connected with the nitrogen oxide converter 10, the high molecular filter film 8 is arranged between the nitrogen oxide converter 10 and the nitrogen oxide analyzer 11, the nitrogen oxide analyzer 11 is connected with the zirconium oxide analyzer 12, and the gas tank 13 is connected with the flow meter 7.

[0023] The air inlet support part comprises a waterproof air inlet film 1 and a structure support 2, the waterproof air inlet film 1 adopts an expanded polytetrafluoroethylene piece, and the expanded polytetrafluoroethylene film is used to allow more measured gas to enter the measuring part, the structure support 2 is equally arranged on the inner side of the air inlet support part, and the structure support 2 adopts a metal piece and plays a supporting role. The air inlet support part and the measuring part are connected in a buckle manner, and polytetrafluoroethylene sealing pads are arranged at the clamping positions to effectively prevent water seepage.

[0024] In the illustration, the upper end of the air inlet support part is the sealing plate 3, and the sealing plate 3 separates the air inlet support part from the measuring part, so even if the air inlet support part seeps water, it will not affect the measuring part. The sealing plate 3 and the measuring part are connected in a threaded manner, and polytetrafluoroethylene sealing pads are arranged at the joint of the sealing plate 3 and the measuring part.

[0025] The air inlet pipe 4 is arranged on one side close to the air inlet support part, and a butyl rubber sealing gasket is arranged between the air inlet pipe 4 and the sealing plate 3. The high polymer filter film 8 is made of polytetrafluoroethylene, which filters the to-be-measured gas and also blocks water from entering the subsequent gas analyzer. The carbon oxide analyzer 9 is arranged on the side away from the air inlet support part, and the zirconium oxide analyzer 12 is arranged on the side away from the air inlet support part.

[0026] The underwater dissolved gas enters the air inlet support part from the water isolation air inlet film 1, then enters the air inlet pipe 4 through the action of the air suction device 5, then reaches the condenser 6 to remove water, then reaches the flow meter 7, then reaches the high polymer filter film 8 to further filter water; then reaches the carbon oxide analyzer 9, which is an infrared analyzer; then reaches the nitrogen oxide converter 10, which is an additional device for analyzing nitrogen dioxide, and uses a catalyst to convert nitrogen dioxide gas into nitric oxide gas; then reaches the nitrogen oxide analyzer 11, which is an infrared analyzer; and then reaches the zirconium oxide analyzer 12.

[0027] The gas tank 13 includes an air gas tank, a nitric oxide gas tank, a sulfur dioxide gas tank, a carbon dioxide gas tank, a carbon monoxide gas tank, and an oxygen gas tank, which are used for calibrating the analyzers. An electromagnetic valve is arranged between the gas tank 13 and the flow meter 7, and the calibration gas reaches the flow meter 7 through the electromagnetic valve, then passes through the high polymer filter film 8, and then reaches the gas analyzer.

[0028] The utility model discloses an integrated multiple gas analyzer, which can measure and monitor the total dissolved gas underwater. The polytetrafluoroethylene film is used to allow more to-be-measured gas to enter the measuring part. The sealing plate 3, the measuring part, and the air inlet support part are connected in multiple ways to improve the air tightness of the device.

Claims

1. An underwater total dissolved gas measuring device, characterized in that, The device includes an air intake support section and a measuring section, the air intake support section cooperating with the measuring section. The air intake support section includes a water-proof air intake membrane and a structural support, the water-proof air intake membrane being disposed on one side of the air intake support section. The measuring section includes a sealing plate, an air intake pipe, an air intake device, a condenser, a flow meter, a polymer filter membrane, a carbon oxide analyzer, a nitrogen oxide converter, a zirconia analyzer, and a gas tank. The air intake pipe is disposed near the sealing plate, the air intake device is connected to the air intake pipe, the condenser is connected to the air intake device, the flow meter is connected to the condenser, a polymer filter membrane is disposed between the flow meter and the carbon oxide analyzer, the carbon oxide analyzer is connected to the nitrogen oxide converter, the polymer filter membrane is disposed between the nitrogen oxide converter and the nitrogen oxide analyzer, the nitrogen oxide analyzer is connected to the zirconia analyzer, and the gas tank is connected to the flow meter.

2. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The water-proof air-inlet membrane is made of expanded polytetrafluoroethylene.

3. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The air intake bracket and the measuring unit are connected by a snap-fit ​​mechanism.

4. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The sealing plate and the measuring part are connected by threads.

5. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The air intake pipe is located on one side near the air intake bracket.

6. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The polymer filter membrane is made of polytetrafluoroethylene.

7. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The carbon oxide analyzer is located on the side away from the air intake support.

8. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The zirconia analyzer is located on the side away from the air intake support.

9. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The structural support is evenly distributed inside the air intake support section.

10. The underwater total dissolved gas measuring device according to claim 1, characterized in that, The structural support is made of metal.

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