Water-gas interface greenhouse gas static floating collecting device capable of being recycled remotely

Abstract

The invention belongs to the technical field of water environment monitoring, and particularly relates to a water-gas interface greenhouse gas static floating collecting device capable of being recycled remotely. The device comprises a floating frame, a sampling chamber, a pressure balance pipe, a gas sampling interface, a remote recovery mechanism and a sensor module, the floating frame is composed of sealed buoys and provides stable buoyancy for the sampling chamber; the sampling chamber keeps the internal and external pressure difference stable through a top capillary pressure balance pipe; a sampling interface matched with an injector and a gas sampling bag is arranged at the top of the sampling device; the side wall of the box body is provided with a humiture and air pressure sensor interface. The device realizes remote positioning and recovery through nylon ropes and hand-cranking pulleys arranged on both sides of a water body, and avoids water body disturbance or safety risk caused by personnel entering the aquaculture pond. The device is resistant to storm waves, good in stability, capable of synchronously recording temperature, humidity and air pressure data, suitable for collecting greenhouse gas of water-gas interfaces of fishing and light integrated systems, conventional ponds and river and lake water bodies, and capable of remarkably improving sampling representativeness and experiment safety.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water environment monitoring, and particularly relates to a water-gas interface greenhouse gas static floating collection device. BACKGROUND

[0002] The static chamber method is one of the most commonly used technologies in water-gas interface greenhouse gas flux monitoring. However, the existing devices generally have the following problems: It is necessary for personnel to enter the water body to place and recover the device, which is easy to cause water surface disturbance, affect sampling accuracy, and has safety risks.

[0003] Most static chamber fixing methods are simple, and are easy to overturn or shake under wind and wave conditions, resulting in flux measurement errors.

[0004] Most devices do not have air temperature, humidity and air pressure synchronous measurement functions, causing calculation uncertainty.

[0005] There is a lack of effective remote recovery mechanism, especially in deep water areas such as photovoltaic breeding ponds, and traditional manual recovery is difficult. SUMMARY

[0006] The purpose of the present application is to provide a water-gas interface greenhouse gas static floating collection device that can be remotely controlled, resistant to wind and waves, low disturbance, and high stability.

[0007] The water-gas interface greenhouse gas static floating collection device provided by the present application realizes efficient collection of water-gas interface greenhouse gas static floating by arranging a remote recovery mechanism, designing a stable buoy, a pressure balance structure and an integrated sensor. Specifically, it comprises: (1) a floating frame composed of a thickened butyl inner tube, a counterweight bag and a sealed buoy; (2) a transparent sampling chamber of an acrylic material cylindrical structure arranged in the floating frame; (3) a capillary tube arranged at the top of the sampling chamber and used as a pressure balance tube to maintain the air pressure balance inside and outside the sampling chamber; (4) a sampling interface installed at the top of the sampling chamber and compatible with the sampling port of the gas sampling bag; (5) a remote recovery mechanism composed of a nylon rope and a hand-operated pulley, wherein the hand-operated pulley is arranged on both banks of the water body, and the nylon rope is fixedly connected to the floating frame, so that the device can move back and forth along the nylon rope; (6) a sensor module comprising temperature, humidity and air pressure sensors, wherein the sensor probe is inserted into the inside of the sampling chamber, the display end is fixed to the outer wall of the sampling chamber, and the sensor module has a waterproof structure.

[0008] The floating frame is designed as an anti-overturning structure and can maintain a stable floating state under wind and wave conditions.

[0009] The floating frame bottom is provided with a transverse stabilizing rod to reduce the attitude change caused by water surface fluctuation.

[0010] The sealed floating cylinder is symmetrically arranged to make the sampling chamber gravity center consistent with the buoyancy center, so as to reduce the risk of overturning.

[0011] The sealed floating cylinder is made of high-density polyethylene (HDPE), which is corrosion-resistant and suitable for exposed water environment.

[0012] The sampling chamber has a volume of 30-50L. The outer wall of the sampling chamber is provided with a detachable sensor installation interface to facilitate sensor replacement and maintenance.

[0013] The sampling chamber adopts a double-layer acrylic structure to reduce the temperature rise deviation caused by light.

[0014] The sampling interface adopts a hose interface with an inner diameter of 5mm and an outer diameter of 7mm. The sampling interface is equipped with a three-way valve, which can extract the gas in the box and inject the gas sampling bag through a syringe.

[0015] The pressure balance pipe adopts a one-way micropore structure to ensure pressure balance and prevent rainwater or aerosol from entering the sampling chamber.

[0016] In the remote recovery device, the sampling chamber is stopped at any position on the water surface through hand-cranked pulley control and nylon rope traction, and the position can be accurately adjusted.

[0017] The hand-cranked pulley is provided with a mechanical brake device to prevent the sampling device from drifting due to rope slippage.

[0018] The size and buoyancy of the device can be modularly adjusted according to the water environment.

[0019] The device is suitable for fish-light complementary environment, and the floating stable structure can reduce the local wind field disturbance caused by photovoltaic shading.

[0020] The main advantages of the present application include: (1) reducing water disturbance during sampling; (2) reducing personnel wading operation; (3) improving device wind and wave adaptability; (4) synchronously monitoring temperature, humidity and pressure; (5) making the sampling results more representative and reliable. Advantages

[0021] (1) remote recovery: remote positioning and deployment are realized through coarse nylon rope and hand-cranked pulley, without water disturbance.

[0022] (2) High stability floating structure: symmetrical arrangement of sealed floating cylinders, strong anti-shaking ability, still maintaining the vertical stability of the box in the wind and waves.

[0023] (3) Pressure balance optimization: capillary pressure balance pipe reduces the error caused by the change of pressure difference in the box.

[0024] (4) Synchronous environmental data monitoring: temperature, humidity and air pressure are recorded synchronously to improve the accuracy of flux calculation.

[0025] (5) Enhanced sampling representativeness: the device can stay in the target water area for a long time, avoiding changes in the water microenvironment caused by manual sampling.

[0026] (6) Improved safety: avoiding personnel to wade, improving the safety of operation in special water areas such as photovoltaic breeding areas. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure diagram of the water-gas interface greenhouse gas static floating collection device of the present application is shown. DETAILED DESCRIPTION

[0028] The device will be described in detail below in conjunction with the drawings.

[0029] (1) Floating frame The floating frame is composed of a thickened butyl rubber inner tube, which is sleeved on the outer periphery of the sampling chamber and provides the main buoyancy. In order to enhance the balance of the buoyancy distribution and the anti-overturning ability, a plurality of counterweight bags are arranged at intervals in the circumferential direction of the inner tube, and the counterweight bags are filled with high-density materials such as metal blocks or stone materials, so that the inner tube can still maintain a stable posture under the condition of wind and waves. The counterweight bags are fixed to the outer side of the inner tube by rope buckles, laces or nylon hanging rings to form a ring-shaped stable structure, which can effectively reduce the horizontal drift and rolling tendency of the sampling device, thereby improving the stability of the sampling process.

[0030] (2) Sampling chamber The sampling chamber adopts a transparent acrylic cylindrical structure with a volume of about 40 L, and the lower end extends into the water to form a closed water-gas interface sampling space. The transparent material facilitates observation of the condensation, liquid level change and pipe connection in the chamber. The sampling chamber is embedded in the center of the inner tube through adhesive rings or fixing rings, so that the sampling chamber remains vertically placed and the contact area with the water surface remains stable.

[0031] (3) Pressure balance pipe A capillary pressure balance pipe is provided at the top of the sampling chamber to maintain the micro-pressure difference balance inside and outside the box during the sampling process, avoiding the positive or negative pressure deviation caused by temperature or gas accumulation affecting the flux measurement. The pressure balance pipe has a small diameter, which can prevent external liquid droplets, insects or water vapor from entering the sampling chamber.

[0032] (4) Sampling interface The sampling chamber top is provided with a hose interface with an inner diameter of about 5 mm and an outer diameter of about 7 mm, which can be matched with a syringe, a three-way valve and a 100 mL gas sampling bag. A Luer connector or a silicone sealing ring can be provided at the sampling interface to ensure good airtightness of the interface during sampling.

[0033] (5) Pulley remote recovery device To avoid disturbance or safety risks caused by personnel entering the water body, the device is placed and recovered by a pulley remote recovery system. Specifically, a coarse nylon rope is arranged across the two banks of the water body, and the two ends are fixed to the anchor points on the shore. A pulley seat or hanging point is arranged on the nylon rope to allow the sampling device to stop at any position along the rope. The shore side pulls the nylon rope through a hand-operated pulley mechanism to realize precise movement and recovery of the sampling device without the need for personnel to operate in the water.

[0034] (6) Sensor module A detachable installation interface is provided on the top of the sampling chamber for installing temperature, humidity and pressure sensors. The sensor probe extends into the interior of the sampling chamber to monitor the micro-meteorological parameters in the sampling space in real time. The display end is fixed to the outer wall of the sampling chamber or a support and is packaged with a waterproof structure to ensure safety and reliability under long-term field monitoring conditions.

[0035] Usage process

[0036] (A) Fix one end of the nylon rope on the shore side, and pull the other end to the opposite bank by a boat and fix it.

[0037] (B) Connect the sampling device to the nylon rope pulley seat, and move it to the target water area position using the pulley.

[0038] (C) After standing for a predetermined time, draw the gas in the box through the three-way valve and inject it into the sampling bag.

[0039] (D) Pull the device back to the shore side through the pulley system.

Claims

1. A remotely recoverable static floating collection device for greenhouse gases at the water-air interface, characterized in that, By deploying a remote recovery mechanism, designing stable buoys, pressure-balancing structures, and integrated sensors, efficient static floating collection of greenhouse gases at the water-air interface is achieved; specifically including: (1) A floating frame consisting of a butyl inner tube, a counterweight bag, and a sealed float; (2) A transparent sampling chamber with an acrylic cylindrical structure set in a floating frame; (3) A capillary tube installed at the top of the sampling chamber to maintain the pressure balance between the inside and outside of the sampling chamber, serving as a pressure balancing tube; (4) A sampling interface installed on the top of the sampling chamber, compatible with the sampling port of the gas sampling bag; (5) A remote retrieval mechanism consisting of a nylon rope and a hand-cranked pulley; the hand-cranked pulley is laid on both banks of the water body, and the nylon rope is fixedly connected to the floating frame, so that the device can move back and forth along the nylon rope; (6) Sensor module, including temperature, humidity and air pressure sensors, sensor probes extend into the sampling chamber, display end is fixed to the outer wall of the sampling chamber and has a waterproof structure.

2. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that: The floating frame is designed as an anti-overturning structure, enabling it to maintain a stable buoyancy under wind and wave conditions. Specifically: The bottom of the floating frame is equipped with a lateral stabilizing bar to reduce attitude changes caused by water surface ripples; The sealed pontoons are arranged symmetrically so that the center of gravity of the sampling chamber is aligned with the center of buoyancy, thereby reducing the risk of capsizing. The sealing pontoon is made of high-density polyethylene, which is corrosion-resistant and suitable for exposed aquatic environments.

3. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that: The sampling chamber has a volume of 30-50L; The outer wall of the sampling chamber is provided with a detachable sensor mounting interface to facilitate sensor replacement and maintenance. The sampling chamber adopts a double-layer acrylic structure to reduce temperature rise deviation caused by light.

4. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that: The sampling interface uses a flexible tube with an inner diameter of 5 mm and an outer diameter of 7 mm. The sampling interface is equipped with a three-way valve, which draws gas from the box and injects it into a gas sampling bag using a syringe.

5. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that, The pressure balance tube adopts a unidirectional microporous structure to ensure air pressure balance while preventing rainwater or aerosols from entering the sampling chamber.

6. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that, In the remote recovery device, the sampling chamber can be stopped at any position on the water surface by means of a hand-cranked pulley and nylon rope traction, and the position can be precisely adjusted.

7. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that, The hand-cranked pulley is equipped with a mechanical braking device to prevent the sampling device from drifting due to rope slippage.

8. The static floating collection device for greenhouse gases at the water-air interface according to claim 1, characterized in that, The size and buoyancy of the device are adjusted according to the aquatic environment.

Images