Gas sampling device and portable monitoring device for carbon emissions in turbulent water bodies

Abstract

The utility model belongs to environmental monitoring technical field, concretely is suitable for turbulent water body carbon emission's gas sampling device and portable monitoring device, including breathing mask, gasbag, air pump, laser range sensor and controller, breathing mask is hollow and the lower part is open elliptic cylinder shape, the top of breathing mask has a pair of air hole for air intake and air outlet, the number of gasbag is even and is evenly arranged in breathing mask side wall outside along the long axis, and the number of gasbag is equal which is arranged on both sides of long axis, air pump sets up at the top of breathing mask, and the air outlet of air pump is sealed communication with a plurality of gasbags through gas pipe respectively, and the solenoid valve that controls its on -off is equipped on gas pipe, laser range sensor sets up at the top of breathing mask, and is located inside breathing mask, controller is connected with laser range sensor, air pump and solenoid valve respectively. Through gasbag dynamic adjustment buoyancy, reduce gas dissipation risk, ensure the accuracy of monitoring data.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, specifically to a gas sampling device and a portable monitoring device applicable to carbon emissions from turbulent water bodies. Background Technology

[0002] With the advancement of carbon neutrality goals, monitoring carbon emissions from water bodies has become a key research focus in the field of ecological environment. In scenarios such as sewage treatment plants and rivers with turbulent water surfaces, the impact of water flow can easily lead to problems such as equipment tilting and gas collection chamber leakage, which seriously affect the continuity and accuracy of data.

[0003] Existing technology 1: The Beijing Aozuo AZG-300 instrument consists of a breathing hood (cylindrical) and a measuring box, and is used to measure the greenhouse gas flux in water. However, in practical applications, it has been found that the gas inside the breathing hood is very easy to escape in turbulent water, resulting in inaccurate measurement data.

[0004] Prior art 2: Invention patent CN202310573897.6 describes a water greenhouse gas sampler that utilizes a floating board to increase the effectiveness of the instrument's contact with the water surface and improve measurement accuracy. However, the length of each floating board is 90-110cm, and the total length of the instrument is over two meters. On the one hand, it is inconvenient to carry and difficult to place in sewage treatment plants and narrow waterways. On the other hand, although the device has a certain wind resistance, there is still a risk of gas escape under waves, and the gas escape situation cannot be monitored.

[0005] Existing technology 3: Remote sensing monitoring technology (such as satellite spectral analysis) is limited by weather and spatial resolution, making it difficult to meet the high-frequency monitoring needs of local areas such as sewage treatment plants. Summary of the Invention

[0006] The purpose of this invention is to provide a monitoring method and portable monitoring device for carbon emissions in turbulent water bodies, in order to solve the problems mentioned in the background art, such as the easy escape of gas inside the breathing mask and its great susceptibility to environmental influences.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gas sampling device for carbon emissions in turbulent water bodies, comprising a breathing mask, airbags, an inflation pump, a laser rangefinder sensor, and a controller; wherein, the breathing mask is a hollow, open-bottomed elliptical cylinder, with a pair of air holes at the top for air intake and exhaust; the number of airbags is even and evenly distributed along the long axis of the breathing mask on the outer side of the sidewall, with an equal number of airbags on both sides of the long axis; the inflation pump is located at the top of the breathing mask, and its outlet is sealed to multiple airbags via an air supply pipe, with a solenoid valve controlling its on / off state on the air supply pipe; the laser rangefinder sensor is located at the top of the breathing mask and inside the breathing mask; the controller is connected to the laser rangefinder sensor, the inflation pump, and the solenoid valve.

[0008] Preferably, the airbags are circular airbags, and there are a total of 6 of them.

[0009] Preferably, a handle is provided in the middle of the upper surface of the top of the breathing mask, and hanging rings are provided at both ends of the long axis of the upper surface of the top of the breathing mask.

[0010] Preferably, a counterweight hook is provided at the lower inner edge of the breathing mask.

[0011] Preferably, the upper surface of the top of the breathing mask is provided with an interface group, and a cable is connected to the interface group, which is connected to the controller.

[0012] Preferably, an electric fan is provided at the center of the lower surface of the top of the breathing mask, and the electric fan is connected to the controller.

[0013] A monitoring device for carbon emissions in turbulent water bodies includes the aforementioned gas sampling device for carbon emissions in turbulent water bodies, and further includes a gas monitor and a gas sampling pump; a pair of gas holes are sealed and connected to the inlet and outlet of the gas monitor respectively through two gas supply pipes, thereby forming a gas flow loop, and the gas sampling pump is connected to the gas flow loop.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] 1. This design uses six circular airbags distributed around the perimeter of the breathing mask to provide external support. The circular airbags increase the contact area with water, making the mask stable and less prone to tipping over. The buoyancy is dynamically adjusted by the circular airbags, allowing for adjustment of the mask's height above the water surface. This ensures the mask's height remains within a reasonable range, reducing the risk of gas leakage and ensuring data accuracy.

[0016] 2. Based on the configuration of six circular airbags, the breathing mask can be adjusted longitudinally by controlling the air intake of the circular airbags, thus making the breathing mask stable.

[0017] 3. After the circular airbag is deflated, it takes up little space and is relatively convenient to carry.

[0018] 4. Enhance resistance to water flow impact to ensure stable and safe operation of the instrument.

[0019] 5. Install a laser rangefinder sensor on the upper side inside the breathing mask to monitor the height of the breathing mask above the water surface in real time, control the amount of gas inside the circular airbag in a timely manner, stop collecting gas to reduce the risk of tipping over and water ingress, and improve the accuracy of gas flux calculation.

[0020] 6. The device is lightweight and compact, making it easy to carry for measurements in different scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the breathing mask of this utility model.

[0022] Figure 2 This is a schematic diagram of the left side of the breathing mask of this utility model.

[0023] Figure 3 This is a top view of the breathing mask structure of this utility model.

[0024] Figure 4 This is a bottom view of the structure of the breathing mask of this utility model.

[0025] In the diagram: 1-breathing mask, 2-hanging ring, 3-handle, 4-air vent, 5-laser rangefinder sensor, 6-airbag, 7-solenoid valve, 8-electric fan, 9-inflation pump, 10-counterweight hook. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Example 1, please refer to Figure 1-4 A gas sampling device for carbon emissions in turbulent water bodies includes a breathing mask 1, an airbag 6, an inflation pump 9, a laser rangefinder sensor 5, and a controller.

[0029] The breathing hood 1 is a hollow, open-bottomed elliptical cylinder, meaning it is an elliptical cylinder without a bottom cover. Specifically, the breathing hood 1 has a length-to-diameter ratio of approximately 2:1, a height of 30cm, a major axis of 60cm, a minor axis of 30cm, a wall thickness of 4mm, and a weight of approximately 5.6kg. The breathing hood 1 is made of stainless steel, which is corrosion-resistant and will not cause secondary pollution to the water. Its smooth surface allows fluid to flow smoothly along the curved surface. Specifically, the major axis of the elliptical cross-section is parallel to the water flow direction, with a rounded front end and a tapering rear end, forming a low-resistance shape that effectively reduces water flow impact and eddy current losses. The longitudinal extension is cylindrical, facilitating the calculation of the gas volume inside the breathing hood at different drafts. The elliptical cross-section has high lateral stiffness, reducing instrument sway caused by lateral water flow impact, such as when the water flow direction changes, for example, in an aeration tank. The top of the breathing mask 1 has a pair of air holes 4 for air intake and exhaust. The number of air bladders 6 is even and they are evenly arranged on the outer side of the side wall of the breathing mask 1 along the long axis of the breathing mask 1, and the number of air bladders 6 on both sides of the long axis is equal. The inflation pump 9 is located on the top of the breathing mask 1. The air outlet of the inflation pump 9 is sealed and connected to multiple air bladders 6 through an air supply pipe. The air supply pipe is equipped with a solenoid valve to control its on and off. The laser range sensor 5 is located on the top of the breathing mask 1 and inside the breathing mask 1. In specific implementation, there are two laser range sensors 5, which are respectively located at both ends of the long axis of the breathing mask 1. They are used to measure the height of the top of the breathing mask 1 from the water surface. The inflation pump and the solenoid valve are dynamically adjusted by the measured height to inflate and deflate the air bladders to adjust the buoyancy and ensure that the breathing mask has a 5cm draft wave redundancy before the measurement begins.

[0030] In practice, a main air tube and several bronchial tubes are installed at the top of the breathing mask 1. The main air tube is sealed and connected to the inflation pump 9, and one end of each of the bronchial tubes is sealed and connected to the main air tube, while the other end is sealed and connected to the airbag 6. A solenoid valve is installed on the main air tube to control the opening and closing of the main air tube.

[0031] The controller is connected to the laser rangefinder 5, the air pump 9, and the solenoid valve 7, respectively. In a specific implementation, the signal output terminal of the laser rangefinder 5 is connected to the signal input terminal of the controller, and the control signal output terminal of the controller is connected to the air pump 9 and the solenoid valve, respectively, to control the start and stop of the air pump 9 and the opening and closing of the solenoid valve 7 according to the distance signal input from the laser rangefinder 5.

[0032] Specifically, the airbag 6 is a circular airbag, with a total of 6 airbags. In actual implementation, the airbag 6 consists of 6 hollow inflatable airbags with a diameter of 15cm, evenly distributed on both sides of the long side of the breathing mask, with 3 airbags on each side and the center line of the float 10cm from the bottom.

[0033] Specifically, a handle 3 is provided in the middle of the upper surface of the top of the breathing mask 1, and hanging rings 2 are provided at both ends of the long axis of the upper surface of the top of the breathing mask 1. The hanging rings 2 and handle 3 are made of the same material as the breathing mask 1. In actual use, the breathing mask is fixed to the shore or the railing of the sewage treatment equipment such as aeration tank or reaction tank by connecting the semi-circular hanging rings 2 with ropes, to prevent water flow from washing away or floating out of control, and to keep the breathing mask in the designated monitoring area. The two ends of the long axis of the elliptical cylinder are symmetrically distributed to balance the force and avoid eccentric pulling that would cause the equipment to tilt or overturn. The direction of the long axis is with the direction of water flow, and the semi-circular ring is located in this direction to reduce the impact of the lateral water flow on the pulling rope. The handle 3 is provided to facilitate lifting the top cover 2 or the breathing mask 1 as a whole. If there are no fixed railings or tree stumps at the measurement site, a gravity anchor or helical anchor can be selected according to the underwater environment, and the instrument can be anchored by connecting the hook at the bottom of the instrument with an ultra-high molecular weight polyethylene rope. Alternatively, personnel wearing life jackets can pull it from the shore. In both cases, safety precautions must be taken, and emergency devices such as quick-release buckles should be provided to ensure the safety of instruments and personnel.

[0034] Specifically, a counterweight hook 10 is provided at the inner lower edge of the breathing mask 1. In practice, when the water surface is too turbulent and the breathing mask is at risk of capsizing, an adjustable counterweight can be added to its bottom. By increasing or decreasing the weight and adjusting the installation position, the center of gravity can be changed. At the same time, the inflation volume of the airbag can be finely adjusted according to the direction of capsizing. Measurement can be started after the instrument's posture is stable. Depending on the actual situation, in strongly turbulent water, two 0.6kg stainless steel counterweights can be selected. By adding counterweights to the bottom of the breathing mask, the center of gravity position is lowered below the draft line, improving the anti-capsizing ability.

[0035] Specifically, the upper surface of the breathing mask 1 is provided with an interface group, on which cables are connected and connected to the controller. The interface group is used to connect external data cables, power cables, etc., for data reception, control, and power supply to electrical appliances. The interface group is located on the upper surface of the breathing mask 1. If necessary, a waterproof membrane or waterproof cover can be installed on the upper part of the interface group to ensure normal data transmission and power supply while preventing water ingress. For electrical appliances such as the air pump 9, the cable can be threaded through and connected to the corresponding electrical appliance, and the threaded part should be sealed.

[0036] Specifically, an electric fan 8 is installed at the center of the lower surface of the top of the breathing mask 1, and the electric fan 8 is connected to the controller. The lower edge of the side wall of the breathing mask 1 is below the water surface. Therefore, the breathing mask 1 and the water surface form a sealed cavity. At this time, the agitation of the electric fan 8 makes the gas concentration in the cavity more uniform, providing a more reliable gas sample for subsequent monitoring.

[0037] Example 2: A monitoring device for carbon emissions in turbulent water bodies, comprising a gas sampling device for carbon emissions in turbulent water bodies as described in Example 1, and further comprising a gas monitor and a gas sampling pump; a pair of gas holes 4 are sealed and connected to the gas monitor’s inlet and outlet ends respectively through two gas delivery pipes, thereby forming a gas flow loop, and the gas sampling pump is connected to the gas flow loop.

[0038] The gas pump draws gas from inside the breathing mask 1 through an air hole 4 on the breathing mask 1 and into the gas monitor through the air inlet. The gas monitor detects the gas, and the detected gas then enters the breathing mask 1 through the air outlet of the gas monitor and another air hole 4 on the breathing mask 1.

[0039] Example 3: A method for monitoring carbon emissions in turbulent water bodies, using the monitoring device for carbon emissions in turbulent water bodies described in Example 2, includes the following steps:

[0040] S1: Observe the measurement environment and place the breathing mask 1 in the water body of the area to be measured; fix the breathing mask to the shore railing, tree stump and other facilities through the hanging ring 2 on the breathing mask to ensure that the breathing mask does not move to a large extent.

[0041] S2: Before measurement, the six circular airbags 6 are inflated and placed on the surface of the water body to be measured. The distance from the top of the breathing mask 1 to the water surface is measured, and the draft of the breathing mask 1 is calculated. The draft is the height of the side wall of the breathing mask 1 submerged in the water body, which is equal to the height of the side wall of the breathing mask 1 minus the height from the top of the breathing mask 1 to the water surface. The controller controls the working time of the air pump 9 based on the distance from the top of the breathing mask 1 to the surface of the water body to be measured fed back by the laser rangefinder 5, and adjusts the amount of gas in the airbags 6 to adjust the buoyancy of the breathing mask 1. When the draft of the breathing mask 1 is 5cm, the controller closes the solenoid valve and the air pump 9 stops working. The status of the breathing mask 1 is observed for 2 minutes.

[0042] When the breathing mask 1 is stable, and when the breathing mask 1 is adjusted to be leak-proof, the laser sensor measurement height is less than 25cm, then turn on the sample gas pump and fan to start the measurement work, turn on the gas pump and electric fan 8, turn on the gas monitor, and start the measurement work.

[0043] S3: During the measurement process, the draft of breathing mask 1 is still dynamically monitored, and the following situations are determined based on the measurement results:

[0044] If the water depth of breathing mask 1 is less than 1 cm, it indicates that breathing mask 1 is at risk of leakage. Turn off the air sampling pump and gas monitor.

[0045] When the water depth of the breathing mask 1 is measured to be 1cm ≤ water depth of the breathing mask 1 < 5cm, the solenoid valve is opened, and the buoyancy of the airbag 6 is changed by the air pump 9 to increase the water depth of the breathing mask 1 and ensure measurement safety.

[0046] When the water draft of breathing mask 1 is measured to be 10cm ≥ 5cm, the measurement is considered to be in good condition. The initial setting of 5cm-10cm is for wave redundancy. By measuring the distance from the top of the breathing mask to the water surface, we know the internal volume height of the breathing mask, and can calculate the internal volume of the breathing mask in real time. This is used to convert the obtained volume concentration data into the emission flux of gas escaping from the water surface. The laser rangefinder 5 is installed in the upper part of the inner cavity of the breathing mask 1. It emits a laser from top to bottom. After the laser is emitted and reaches the receiving end of the laser rangefinder 5, the time difference from emission to reception is calculated. The speed of the laser in the air is considered constant, and the height of the laser rangefinder 5 above the water surface can be obtained. Here, the laser emitting end of the laser rangefinder 5 is considered to be flush with the upper surface of the inner cavity of the breathing mask 1. The measured distance is considered to be the distance between the upper end of the inner cavity of the breathing mask 1 and the water surface. Since the cross-section of the breathing mask 1 is an ellipse of uniform size, the gas volume inside the breathing mask 1 can be calculated by measuring the height. By dynamically adjusting the valves of the air pump 9 and the air pipeline network according to the measured height, the circular airbag 6 is inflated and deflated to adjust buoyancy and ensure that the breathing mask 1 has a 5cm draft wave redundancy before the measurement begins. During the gas collection process, the operating draft is controlled between 5cm and 10cm to ensure that a certain cavity volume is left for gas collection, while ensuring that there is no risk of air leakage or water ingress into the instrument.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas sampling device suitable for carbon emissions in turbulent water bodies, characterized in that, Includes a breathing mask (1), an airbag (6), an inflation pump (9), a laser rangefinder (5), and a controller; The breathing mask (1) is a hollow, open-bottomed elliptical cylinder. The top of the breathing mask (1) has a pair of air holes (4) for air intake and exhaust. The number of air bags (6) is even and they are evenly arranged on the outside of the side wall of the breathing mask (1) along the long axis. The number of air bags (6) on both sides of the long axis is equal. The inflation pump (9) is located on the top of the breathing mask (1). The air outlet of the inflation pump (9) is sealed and connected to multiple air bags (6) through an air supply pipe. The air supply pipe is equipped with a solenoid valve (7) to control its opening and closing. The laser range sensor (5) is located on the top of the breathing mask (1) and inside the breathing mask (1). The controller is connected to the laser rangefinder (5), the air pump (9), and the solenoid valve (7), respectively.

2. The gas sampling device for carbon emissions in turbulent water bodies according to claim 1, characterized in that: The airbags (6) are circular airbags, and there are a total of 6 of them.

3. A gas sampling device for carbon emissions in turbulent water bodies according to claim 1, characterized in that: A handle (3) is provided in the middle of the upper surface of the top of the breathing mask (1), and a hanging ring (2) is provided at both ends of the long axis of the upper surface of the top of the breathing mask (1).

4. A gas sampling device for carbon emissions in turbulent water bodies according to claim 1, characterized in that: A counterweight hook (10) is provided at the lower inner edge of the breathing mask (1).

5. A gas sampling device for carbon emissions in turbulent water bodies according to claim 4, characterized in that: The upper surface of the top of the breathing mask (1) is provided with an interface group, and a cable is connected to the interface group, which is connected to the controller.

6. A gas sampling device for carbon emissions in turbulent water bodies according to claim 4, characterized in that: An electric fan (8) is provided at the center of the lower surface of the top of the breathing mask (1), and the electric fan (8) is connected to the controller.

7. A portable monitoring device for carbon emissions in turbulent water bodies, characterized in that: The device includes a gas sampling device for carbon emissions in turbulent water bodies as described in any one of claims 1-6, and further includes a gas monitor and a gas sampling pump; a pair of gas holes (4) are sealed and connected to the gas monitor’s inlet and outlet ends respectively through two gas pipes, thereby forming a gas flow loop, and the gas sampling pump is connected to the gas flow loop.

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