A liquid surface volatile gas in-situ detection device

Abstract

This invention provides an in-situ detection device for volatile gases on a liquid surface, relating to the field of liquid gas detection technology. It includes: multiple retractable legs arranged in a matrix, each leg capable of extending and retracting along the vertical Z-direction; an X-axis moving mechanism at the lower end of each leg; and a Y-axis moving guide rail connected to the upper end of each leg; a Y-axis moving bracket mounted on the Y-axis moving guide rail, with a Y-axis moving mechanism located on the side of the bracket closest to the guide rail; a sampling platform connected to the lower part of the Y-axis moving bracket via a lifting mechanism; a sampling and detection device and a communication module mounted on the sampling platform; the sampling and detection device collecting and detecting gas samples to generate detection information; and the communication module transmitting the detection information; and a sealing cover, which is a box-shaped structure with an open bottom, detachably connected to the Y-axis moving bracket. This device enables flexible in-situ sampling and detection of volatile gases on a liquid surface.

Description

Technical Field

[0001] This invention belongs to the field of liquid surface gas detection technology, and more specifically, relates to an in-situ detection device for volatile gases on a liquid surface. Background Technology

[0002] Currently, in the field of wastewater treatment, in-situ sampling of volatile gases above the liquid surface in a pool involves placing a container of a certain area with an open bottom over the water surface to form a sealed container. Gas is collected from this sealed container and transported to a detection device placed on the ground near the pool surface. This detection method has the following problems: 1. To replenish the gas drawn from the sealed container to the detection device, ventilation holes are added to the sealed container or gaps are left between the gas collection hood and the liquid surface. These methods introduce air from outside the sealed hood into the hood, causing changes in the original accumulated gas concentration inside the hood; 2. The sealed container and the gas detection device are connected by a flexible hose, limiting the sampling range to the edge of the pool and preventing access to the center of the water; 3. The limited height of the sealed container and the fixed sampling position make it impossible to collect and analyze gases at different heights within the sealed space of the actual pool surface; 4. The fixed water surface area of ​​the sealed container shields the volatile gases inside the hood from the influence of natural air, making it impossible to flexibly collect and detect gases in a naturally evaporating state on the liquid surface, or to simulate and detect the state after ventilation within the sealed odor-eliminating hood. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an in-situ detection device for volatile gases on the liquid surface, thereby solving at least one problem in the existing methods for detecting volatile gases on the liquid surface.

[0004] To achieve the above objectives, the present invention provides an in-situ detection device for volatile gases on a liquid surface, comprising:

[0005] Multiple retractable legs are arranged in a matrix. The retractable legs can extend and retract along the vertical Z direction. The lower end of the retractable legs is provided with an X-axis moving mechanism, and the upper end of the retractable legs is connected to a Y-axis moving guide rail.

[0006] A Y-axis movable support is mounted on the Y-axis movable guide rail, and a Y-axis movable mechanism is provided on the side of the Y-axis movable support close to the Y-axis movable guide rail.

[0007] A sampling platform is connected to the lower part of the Y-axis movable support via a lifting mechanism. The sampling platform is equipped with a sampling and detection device and a communication module. The sampling and detection device can collect gas samples and detect them to generate detection information. The communication module is used to transmit the detection information.

[0008] A sealing cover, which is a box-shaped structure with an open bottom, is detachably connected to the Y-axis movable bracket.

[0009] Optionally, the system further includes a control unit, which is communicatively connected to the communication module. The control unit is used to send control information to the in-situ detection device for volatile gases on the liquid surface and to receive the detection information.

[0010] Optionally, the sampling and detection device includes a gas sampling module and a liquid sampling module. The gas sampling module and the liquid sampling module are respectively provided with outwardly extending gas sampling tubes and liquid sampling tubes. The outer end of the liquid sampling tube extends downward toward the sampling platform, and a purge tube is provided on one side of the liquid sampling tube. The purge tube is used to blow out airflow to purge floating objects on the liquid surface.

[0011] Optionally, a cleaning mechanism is provided below the sampling platform. The cleaning mechanism includes a driving sprocket and a driven sprocket. A transmission chain is sleeved on the outside of the driving sprocket and the driven sprocket, and an outwardly extending scraper is connected to the outer periphery of the transmission chain.

[0012] Optionally, the sampling and detection device further includes a gas sample storage module and a liquid sample storage module, which are used to store gas samples and liquid samples, respectively.

[0013] Optionally, the top of the sealing cover is provided with a rigid top plate, which is detachably disposed on the upper side of the Y-axis movable bracket, the perimeter of the sealing cover is made of soft material, and a first float is connected to the lower perimeter of the sealing cover.

[0014] Optionally, the top plate has a through hole, and a louver is provided in the through hole. An exhaust fan is provided near the outside of the sealing cover. The exhaust fan is used to extract gas from the sealing cover. The louver opens during the extraction process and closes by its own weight when the exhaust fan stops extracting.

[0015] Optionally, the retractable support legs are located at both ends of the Y-axis moving guide rail, and the X-axis moving mechanism cooperates with the outer side of the container of the liquid being tested to achieve X-axis movement.

[0016] Optionally, it also includes a first support frame for connecting to a trolley on a container of the liquid being tested, and the X-axis moving mechanism cooperates with the first support frame.

[0017] Optionally, it also includes a second float, on the upper side of which a second support frame is provided. Both the second float and the second support frame are annular, and the X-axis moving mechanism cooperates with the second support frame.

[0018] This invention provides an in-situ detection device for volatile gases on a liquid surface. Its advantages are as follows: The device, through the installation of retractable legs, an X-axis moving mechanism, and a Y-axis moving mechanism, allows for positional adjustment of the platform in the X, Y, and Z directions, enabling flexible sampling and detection of gases at different positions and heights on the liquid surface. Furthermore, the sampling platform is connected to the lower part of the Y-axis moving support via a lifting mechanism, and the sampling and detection device is mounted on the sampling platform, enabling true in-situ detection on the liquid surface. It also allows for the transmission of detection information via a communication module. Simultaneously, the detachable sealing cover allows for detection of volatile gases both within a sealed, confined space and in freely volatile liquid surfaces, making it highly flexible in use.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0021] Figure 1 A top view of an in-situ detection device for volatile gases on a liquid surface according to an embodiment of the present invention is shown.

[0022] Figure 2 A top view schematic diagram of the moving and lifting adjustment structure of an in-situ detection device for volatile gases on the liquid surface according to an embodiment of the present invention is shown.

[0023] Figure 3 A front view schematic diagram of the moving and lifting adjustment structure of an in-situ detection device for volatile gases on the liquid surface according to an embodiment of the present invention is shown.

[0024] Figure 4 A top view of the sampling platform and Y-axis moving support of an in-situ detection device for volatile gases on a liquid surface according to an embodiment of the present invention is shown.

[0025] Figure 5 A front view schematic diagram of the sampling platform and Y-axis moving support of an in-situ detection device for volatile gases on the liquid surface according to an embodiment of the present invention is shown.

[0026] Figure 6 A top view of the sealing cover and Y-axis moving support of an in-situ detection device for volatile gases on the liquid surface according to an embodiment of the present invention is shown.

[0027] Figure 7 A front view schematic diagram of the sealing cover and Y-axis moving support of an in-situ detection device for volatile gases on the liquid surface according to an embodiment of the present invention is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Retractable support legs; 2. X-axis moving mechanism; 3. Y-axis moving guide rail; 4. Y-axis moving bracket; 5. Y-axis moving mechanism; 6. Sampling platform; 7. Lifting mechanism; 8. Sampling and testing equipment; 9. Communication module; 10. Sealing cover; 11. Traction rope; 12. Lifting lug; 13. Control unit; 14. Gas sampling tube; 15. Liquid sampling tube; 16. Purge tube; 17. Drive sprocket; 18. Driven sprocket; 19. Transmission chain; 20. Scraper; 21. First float; 22. Exhaust fan; 23. Liquid surface; 24. Support rod. Detailed Implementation

[0030] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0031] Example 1

[0032] like Figure 1 As shown, the present invention provides an in-situ detection device for volatile gases on a liquid surface, comprising:

[0033] Multiple retractable legs 1 are arranged in a matrix. The retractable legs 1 can extend and retract along the vertical Z direction. The lower end of the retractable legs 1 is provided with an X-axis moving mechanism 2, and the upper end of the retractable legs 1 is connected to a Y-axis moving guide rail 3.

[0034] Y-axis moving bracket 4 is mounted on Y-axis moving guide rail 3, and Y-axis moving mechanism 5 is mounted on the side of Y-axis moving bracket 4 near Y-axis moving guide rail 3.

[0035] The sampling platform is connected to the Y-direction moving support 4 via the lifting mechanism 7. The sampling platform is equipped with a sampling and detection device 8 and a communication module 9. The sampling and detection device 8 can collect gas samples and detect them to generate detection information. The communication module 9 is used to transmit the detection information.

[0036] The sealing cover 10 is a box-shaped structure with an open bottom, and the sealing cover 10 is detachably connected to the Y-axis movable bracket 4.

[0037] Specifically, the in-situ detection device for volatile gases on the liquid surface provided by this invention, through the setting of retractable support legs 1, X-axis moving mechanism 2 and Y-axis moving mechanism 5, can realize the position adjustment of the platform 6 in the X, Y and Z directions, and can flexibly sample and detect gases at different positions and heights on the liquid surface. Furthermore, the sampling platform is connected to the lower part of the Y-axis moving support 4 through the lifting mechanism 7, and the sampling and detection device 8 is set on the sampling platform, which can realize true in-situ detection on the liquid surface, and can also transmit detection information through the communication module 9. At the same time, the sealing cover 10 is detachable, which can detect volatile gases on the liquid surface in a sealed confined space, as well as detect volatile gases on a freely volatile liquid surface, making it very flexible in use.

[0038] Furthermore, the telescopic outrigger 1 can be an electric telescopic rod or a hydraulic telescopic rod, which can not only achieve lifting and lowering but also facilitate control. The X-axis moving mechanism 2 and the Y-axis moving mechanism 5 can be drive wheels, which are powered by a drive motor. The rotation of the drive wheels realizes the X-axis and Y-axis movement. The lifting mechanism 7 can be a telescopic rod or a combination of a lifting motor, a winding wheel and a traction rope 11.

[0039] In this embodiment, the lifting mechanism 7 includes a lifting motor, a winding wheel, and a traction rope 11. The winding wheel is connected to the lifting motor, the upper end of the traction rope 11 is wound around the winding wheel, and the lower end of the traction rope 11 is connected to the lifting lug 12 provided on the upper side of the sampling platform.

[0040] Optionally, it also includes a control unit 13, which is connected to the communication module 9. The control unit 13 is used to send control information to the in-situ detection device for volatile gases on the liquid surface and to receive detection information.

[0041] Specifically, the control unit 13 may include a CPU, which can manually input control information or set and store control information for automatic detection, thereby realizing automatic and unattended detection. The control unit 13 may also be connected to a display module and / or a storage module. After receiving the detection information, the control unit 13 can display it through the display module and / or store it in the storage module.

[0042] Optionally, the sampling and detection device 8 includes a gas sampling module and a liquid sampling module. The gas sampling module and the liquid sampling module are respectively provided with an outwardly extending gas sampling tube 14 and a liquid sampling tube 15. The outer end of the liquid sampling tube 15 extends downward toward the sampling platform, and a purge tube 16 is provided on one side of the liquid sampling tube 15. The purge tube 16 is used to blow out airflow to purge floating objects on the liquid surface.

[0043] Specifically, the inclusion of gas and liquid sampling modules enables this in-situ liquid surface volatile gas detection device to detect not only volatile gases on the liquid surface but also the liquid itself at that location. This combined detection approach facilitates the analysis of the liquid's characteristics and the gases it produces, improving the accuracy of the analysis results. The outer end of the gas sampling tube 14 extends into the air, while the outer end of the liquid sampling tube 15 extends downwards below the sampling platform to allow it to be submerged below the liquid surface for sampling. The gas sampling tube 14 can be connected to an extraction unit for gas extraction, and the liquid sampling tube 15 can be connected to a pump for liquid extraction. The outer end of the purge tube 16 is located near the outer end of the liquid sampling tube 15 and can be connected to a blower to purge floating debris from the liquid surface, improving the accuracy of liquid sampling and detection.

[0044] In this embodiment, the sampling and detection device 8 includes a gas detection module and a liquid detection module, which can detect both gases and liquids. The detection includes, but is not limited to: gas physical property detection (temperature, humidity, atmospheric pressure, etc.), gas component detection (hydrogen sulfide, ammonia, odor concentration, methanethiol, non-methane total hydrocarbons, etc.), liquid physical property detection (temperature, pH, ORP, etc.), and liquid water quality detection (COD, TN, TP, TS, etc.).

[0045] Optionally, a cleaning mechanism is provided below the sampling platform. The cleaning mechanism includes a drive sprocket 17 and a driven sprocket 18. A transmission chain 19 is sleeved on the outside of the drive sprocket 17 and the driven sprocket 18. An outwardly extending scraper 20 is connected to the outer periphery of the transmission chain 19.

[0046] Specifically, the cleaning mechanism drives the driven sprocket 18 and the transmission chain 19 to run through the rotation of the drive sprocket 17, which in turn drives the scraper 20 on the outer periphery of the transmission chain 19 to move, scraping away the debris that is difficult to blow away from the liquid surface, thereby further improving the accuracy of liquid sampling and detection.

[0047] In other embodiments, a rotating blade can be used instead of the cleaning mechanism described above. The rotation of the rotating blade can push away debris that is difficult to sweep away from the surface of the liquid.

[0048] Optionally, the sampling and detection device 8 also includes a gas sample storage module and a liquid sample storage module, which are used to store gas samples and liquid samples, respectively.

[0049] Specifically, the in-situ detection equipment for volatile gases on the liquid surface is also equipped with a gas storage module and a liquid storage module for sample retention, which solves the problem that current technology cannot carry out historical sample traceability detection.

[0050] Optionally, the top of the sealing cover 10 is provided with a rigid top plate, which is detachably provided on the upper side of the Y-direction moving bracket 4. The sides of the sealing cover 10 are made of soft material, and the lower end of the sealing cover 10 is connected to a first float 21.

[0051] Specifically, the outer periphery of the sealing cover 10 is made of soft material, and its lower end is wrapped around the first float 21. This makes it easy to adjust the height of the sealing cover 10 by controlling the number of wrapping turns, and thus facilitates the lifting and lowering of the retractable support leg 1 to achieve gas sampling and detection at different heights under sealed conditions.

[0052] In this embodiment, retractable support rods 24 are provided at both ends of the Y-axis movable bracket, and the support rods 24 are used to support the sealing cover.

[0053] Optionally, the top plate has a through hole with louvers installed inside. An exhaust fan 22 is installed near the outside of the sealing cover 10. The exhaust fan 22 is used to extract gas from the sealing cover 10. The louvers open during the extraction process and close by their own weight when the exhaust fan 22 stops extracting gas.

[0054] Specifically, the through-hole and exhaust fan 22 enable the sampling and detection of gas in the simulated deodorizing sealing cover 10. The louvers function similarly to a one-way valve, opening when venting and automatically closing when not venting, thus maintaining the sealing performance of the sealed container.

[0055] Furthermore, during sealed sampling and testing, the louvers automatically close, and the gas detection module and liquid detection module are inside the sealed enclosure. Both the intake and exhaust of gas are completed within the sealed enclosure 10, avoiding the large influx of outside air into the sealed enclosure 10 that could cause inaccurate test results.

[0056] Optionally, the retractable support legs 1 are installed at both ends of the Y-axis moving guide rail 3, and the X-axis moving mechanism 2 cooperates with the outer ground of the container of the liquid being measured to achieve X-axis movement.

[0057] Specifically, for an open pool, when there is no traveling vehicle on the pool, the in-situ detection device for volatile gases on the pool surface can move in the X direction by cooperating with the ground or platform around the pool body through the X-axis moving mechanism 2. For a rectangular pool, the retractable legs 1 at both ends of the Y-axis moving bracket 4 can span the short side of the liquid surface inside the rectangular pool. For a circular pool, the retractable legs 1 at both ends of the Y-axis moving bracket 4 can span the diameter of the liquid surface inside the circular pool.

[0058] Example 2

[0059] The difference between this embodiment and Embodiment 1 is that:

[0060] Optionally, it also includes a first support frame for connecting to a trolley on the container of the liquid being tested, and the X-axis moving mechanism 2 cooperates with the first support frame.

[0061] Specifically, for the liquid surface formed by an open pool, when a traveling trolley is installed on the pool, the trolley is connected to the first support frame, and the in-situ detection device for volatile gases on the liquid surface is placed on the first support frame. The first support frame is a rectangular ring, and its two parallel beams can serve as the X-axis moving guide rail for the X-axis moving mechanism 2 to move on it. For a rectangular pool, the retractable legs 1 at both ends of the Y-axis moving bracket 4 can move with the traveling trolley that spans the liquid surface in the rectangular pool. For a circular pool, the retractable legs 1 at both ends of the Y-axis moving bracket 4 can make circular motion with the traveling trolley that is set along the radius of the liquid surface in the circular pool.

[0062] Example 3

[0063] The difference between this embodiment and Embodiment 1 is that:

[0064] Optionally, it also includes a second float, on the upper side of which a second support frame is provided. Both the second float and the second support frame are annular, and the X-axis moving mechanism 2 cooperates with the second support frame.

[0065] Specifically, for the liquid surface formed by the ultra-large pool, the in-situ detection device for volatile gases on the liquid surface can work by floating on the liquid surface with the second float. The second support frame is a rectangular ring, and its two parallel beams can serve as the X-axis moving guide rail for the X-axis moving mechanism 2 to move on it. At the same time, a pushing mechanism can also be set on the second float to push the second float to move on the liquid surface.

[0066] In summary, the in-situ detection device for volatile gases on the liquid surface provided by this invention can realize three detection conditions: simulating odor-deterrent sealed cover 10, volatile gases on a completely sealed confined space, and volatile gases on a free water surface. This solves the problem that the detection of volatile gases on the liquid surface in existing technologies can only be used for volatile gases on a completely sealed confined space. The gas detection module and the liquid detection module are located inside the sealed cover, and both the intake and exhaust of gas are completed within the sealed cover 10, solving the problem that the original cumulative gas concentration within the sealed cover 10 is affected by the sampling flow rate. Through the setting of the retractable support leg 1, the X-axis moving mechanism 2, and the Y-axis moving mechanism 5, the position adjustment of the platform 6 in the X, Y, and Z directions can be realized. This invention addresses the limitations of current technologies for sampling volatile gases from liquid surfaces, which cannot reach the center of the water body or collect gases at a certain height above the water surface. The highly integrated in-situ detection device for volatile gases from liquid surfaces simultaneously collects both gas and liquid samples, solving the problem of current technologies that only sample and analyze gases and cannot simultaneously incorporate liquid detection for comprehensive analysis. Furthermore, it includes gas and liquid sample storage modules for sample retention, addressing the inability of current technologies to conduct historical sample traceability testing. Additionally, it is equipped with a communication module 9 and a control unit 13, enabling remote automatic control and eliminating the need for personnel to operate the equipment near the device.

[0067] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An in-situ detection device for volatile gases on a liquid surface, characterized in that, include: Multiple retractable legs are arranged in a matrix. The retractable legs can extend and retract along the vertical Z direction. The lower end of the retractable legs is provided with an X-axis moving mechanism, and the upper end of the retractable legs is connected to a Y-axis moving guide rail. A Y-axis movable support is mounted on the Y-axis movable guide rail, and a Y-axis movable mechanism is provided on the side of the Y-axis movable support close to the Y-axis movable guide rail. A sampling platform is connected to the lower part of the Y-axis movable support via a lifting mechanism. The sampling platform is equipped with a sampling and detection device and a communication module. The sampling and detection device can collect gas samples and detect them to generate detection information. The communication module is used to transmit the detection information. A sealing cover, which is a box-shaped structure with an open bottom, and is detachably connected to the Y-axis movable bracket; The top of the sealing cover is provided with a rigid top plate, which is detachably provided on the upper side of the Y-axis moving bracket. The sides of the sealing cover are made of soft material, and the lower sides of the sealing cover are connected to a first float. The top plate has a through hole, and a louver is installed in the through hole. An exhaust fan is installed near the outside of the sealing cover. The exhaust fan is used to extract gas from the sealing cover. During the extraction process, the louver opens and closes by its own weight when the exhaust fan stops extracting gas.

2. The in-situ detection device for volatile gases on the liquid surface according to claim 1, characterized in that, It also includes a control unit, which is communicatively connected to the communication module. The control unit is used to send control information to the in-situ detection device for volatile gases on the liquid surface and to receive the detection information.

3. The in-situ detection device for volatile gases on the liquid surface according to claim 1, characterized in that, The sampling and detection equipment includes a gas sampling module and a liquid sampling module. The gas sampling module and the liquid sampling module are respectively provided with outwardly extending gas sampling tubes and liquid sampling tubes. The outer end of the liquid sampling tube extends downward toward the sampling platform, and a purge tube is provided on one side of the liquid sampling tube. The purge tube is used to blow out airflow to purge floating objects on the liquid surface.

4. The in-situ detection device for volatile gases on the liquid surface according to claim 3, characterized in that, A cleaning mechanism is provided below the sampling platform. The cleaning mechanism includes a drive sprocket and a driven sprocket. A transmission chain is sleeved on the outside of the drive sprocket and the driven sprocket. An outwardly extending scraper is connected to the outer periphery of the transmission chain.

5. The in-situ detection device for volatile gases on the liquid surface according to claim 3, characterized in that, The sampling and detection equipment also includes a gas sample storage module and a liquid sample storage module, which are used to store gas samples and liquid samples, respectively.

6. The in-situ detection device for volatile gases on the liquid surface according to claim 1, characterized in that, The retractable support legs are located at both ends of the Y-axis moving guide rail, and the X-axis moving mechanism cooperates with the outer side of the container of the liquid being tested to achieve X-axis movement.

7. The in-situ detection device for volatile gases on the liquid surface according to claim 1, characterized in that, It also includes a first support frame, which is used to connect to a trolley on the container of the liquid being tested, and the X-axis moving mechanism cooperates with the first support frame.

8. The in-situ detection device for volatile gases on the liquid surface according to claim 1, characterized in that, It also includes a second float, on the upper side of which a second support frame is provided. Both the second float and the second support frame are annular, and the X-axis moving mechanism cooperates with the second support frame.

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