A device and method for detecting the concentration of suspended sludge entering the sea.

Abstract

This invention relates to the field of seawater testing technology, and in particular to a device and method for detecting the concentration of suspended sediment entering the sea. The device includes a floating base, a connecting shell, a separating assembly, a first test piece, and a second test piece. The connecting shell is located below the floating base and has a light-blocking plate surrounding its center. The separating assembly includes a telescopic rod connecting the floating base and the separating plate and controlling the up-and-down movement of the separating plate, the separating plate itself, and protective bandages. Several protective bandages are arranged around the sidewall of the separating plate, with their ends rotatably connected to the inner sides of the separating plate and the light-blocking plate, respectively. The first test piece is located inside the light-blocking plate, and the second test piece is located below the light-blocking plate. The protective bandages include elastic bands and retaining strips. Several retaining strips are horizontally fixedly connected to the elastic bands, and stretching the elastic bands widens the distance between adjacent retaining strips. This invention, by setting up a separating assembly, divides the suspended sediment into two test pieces according to different layers, achieving layered detection of marine suspended sediment and greatly improving the accuracy of concentration testing.

Description

Technical Field

[0001] This invention relates to the field of seawater testing technology, and in particular to a device and method for detecting the concentration of suspended sludge entering the sea. Background Technology

[0002] During piling operations at the dock, the deep excavation by the piling machine will cause suspended sediment to be released into the sea. This suspended sediment may have an adverse impact on seawater quality, marine habitats, and the balance of the marine ecosystem. Therefore, it is necessary to monitor the concentration of suspended sediment in real time during the piling process to prevent this.

[0003] Current methods for detecting marine sediment concentration often employ infrared absorption and scattering technology. The core of this technology is based on the absorption and scattering characteristics of light. When an infrared light-emitting diode emits near-infrared light of a specific wavelength that penetrates seawater, the light interacts with suspended sediment particles in the water. Some of the light is absorbed by the particles, while some is scattered, resulting in an attenuation of the transmitted light intensity. At this point, a silicon photovoltaic cell is used to collect the attenuated light signal and convert it into a corresponding electrical signal. Then, by combining this signal with Lambert-Beer's law (which states that the degree of light attenuation has a quantitative relationship with the concentration of light-absorbing substances in the medium), the concentration of suspended sediment in the seawater can be deduced.

[0004] Infrared absorption scattering technology can detect high turbidity, but the diameter of particles in the suspended mud caused by pile driving machines often varies greatly, which can easily interfere with the test results of infrared absorption scattering technology. Moreover, since infrared absorption scattering technology is mostly a fixed-point test, it is difficult to accurately measure the concentration changes of multi-layer suspended mud generated by pile driving machines, resulting in low consistency of water sample test results. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a device and method for detecting the concentration of suspended sludge entering the sea, which has the advantages of refined detection, more accurate testing, and the ability to perform real-time testing of multi-level suspended sludge.

[0006] In a first aspect, the present invention provides a device for detecting the concentration of suspended sediment entering the sea, comprising a floating base, a connecting shell, a separating assembly, a test piece one, and a test piece two. The connecting shell is located below the floating base, and a light-blocking plate is arranged around the middle of the connecting shell. The separating assembly includes a telescopic rod, a separation plate, and protective bandages. The telescopic rod connects the floating base and the separation plate and controls the up-and-down movement of the separation plate. Several protective bandages are arranged around the side wall of the separation plate, and their two ends are respectively rotatably connected to the inner side of the separation plate and the light-blocking plate. The test piece one is located inside the light-blocking plate, and the test piece two is located below the light-blocking plate. The protective bandages include elastic bands and baffles. Several baffles are laterally fixedly connected to the elastic bands, and stretching the elastic bands widens the distance between adjacent baffles. The separating plate separates the suspended sediment entering the sea according to the particle diameter and performs concentration testing within the space occupied by the corresponding two test pieces.

[0007] Furthermore, both test piece one and test piece two include a light-emitting component and a photodetector. The infrared light emitted by the light-emitting component is scattered and / or transmitted after reaching the suspended sludge and is captured by the photodetector to complete the concentration test.

[0008] Furthermore, the photodetector of test piece one is a 90° scattered light detector; the photodetector of test piece two has two types, namely a transmitted light detector and a 90° scattered light detector; wherein, the 90° scattered light detector is set perpendicular to the optical path of the light-emitting component, and the transmitted light detector is set opposite to the optical path of the light-emitting component.

[0009] Furthermore, the light-emitting component includes a fixed housing, a light source column, a spherical cover, and a cleaning roller. The fixed housing is connected to the connecting housing. The light source column is horizontally disposed inside the fixed housing. The spherical cover is rotatably coaxially disposed with the light source column. The cleaning roller is rotatably disposed on one side of the light source column and its sidewall contacts the spherical cover. Driving the cleaning roller to rotate causes the spherical cover to rotate around the light source column.

[0010] Furthermore, the light-emitting component also includes a fixing block and a limiting block. The fixing block is located below the spherical cover, and the limiting block is slidably located above the spherical cover, with a spring at its top.

[0011] Furthermore, the bottom of the floating seat is provided with a dust collection plate, and several inclined plates are arranged at the bottom of the dust collection plate. The dust collection plate is slidably connected to the floating seat, and a gap is left at the connection between the two to allow the dust collection plate to float up and down.

[0012] Furthermore, the floating seat is equipped with a movable rod, which is connected to one side of the dust collection plate and drives it to slide at the bottom of the floating seat.

[0013] Furthermore, the top of the light-blocking plate is provided with several air outlet pipes, the top and bottom of the separation plate are both mesh-like, the top of the separation plate is provided with an air distribution groove, one end of the air distribution groove is connected to an arc-shaped groove into which half of the air outlet of the air outlet pipe can be embedded, and part of the gas discharged from the air outlet pipe is discharged from the top of the air distribution groove and part of it is discharged from the bottom of the air distribution groove; thereby promoting the gas discharged from the air outlet pipe to diffuse laterally in the middle layer of the separation plate.

[0014] Furthermore, the bottom of the connecting housing is symmetrically provided with swing rods, and several swing rods are rotatably connected to the bottom of the connecting housing in parallel. The descent of the separation plate drives the swing rods to swing, increasing the disorder of suspended mud in the environment around the detection device.

[0015] Secondly, the present invention provides a detection method for a device for detecting the concentration of suspended sludge entering the sea, wherein the detection device described above comprises the following specific steps:

[0016] S1: Deploy the detection device to the point to be detected, and then start it to lower the separation plate to the bottom of the connecting shell. At this time, the elastic band on the protective bandage is stretched and deformed, which makes the gap between the baffle strip wide, allowing some seawater to enter the protective bandage.

[0017] S2: After standing for 5-10 minutes in the above state, the separation plate will move upward quickly, and once it exceeds test piece two, test piece two will be activated immediately to detect the seawater concentration within the test range.

[0018] S3: The separation plate continues to move upward until it exceeds test piece one, and then moves downward to below test piece one. At this time, test piece one is immediately activated to detect the seawater concentration within the test range.

[0019] S4: Process the concentrations measured by test specimen 1 and test specimen 2, and take the average value as the concentration of suspended sludge entering the sea in the corresponding area.

[0020] Among them, test piece one was tested using the 90° scattering method; test piece two was tested using the transmission scattering ratio method.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are:

[0022] This invention achieves stratified detection of marine suspended sediment by setting up a separating component to divide the suspended sediment into two test pieces according to different layers, greatly improving the accuracy of concentration testing. Taking into account the uneven distribution of suspended sediment particle diameter from bottom to top during piling, a separation plate that can move up and down is set up to achieve uniform mixing of the upper and lower layers of suspended sediment. At the same time, protective bandages are set up, and the elastic band deformation characteristics under force make the containment capacity and allowable diameter around the separation plate change with the position of the separation plate, preventing the turbulence effect generated during the movement of the separation plate from causing uneven particle distribution in the area, thus increasing the accuracy of test data.

[0023] This invention employs two testing methods to ensure accurate detection while reducing equipment costs. A light-blocking plate divides the test piece into a testing area and provides a testing environment for the 90° scattered light detector. An infrared test beam is emitted from a light source column, with a rotatable spherical cover surrounding it. A cleaning roller drives the spherical cover to rotate while simultaneously cleaning its surface, achieving self-cleaning of the light-emitting components on the test piece, extending the device's maintenance cycle, and simplifying the testing process. Fixed blocks and limiting blocks are placed at the upper and lower ends of the spherical cover; the limiting blocks can move up and down to increase the rotational resistance of the spherical cover and enhance the cleaning force of the cleaning roller. A dust collection plate, coordinated with the movement of the separation plate, collects and extends the fall time of large-particle suspended sludge after testing, effectively cleaning the suspended sludge above the separation plate. An air outlet pipe further enhances the cleaning effect of suspended sludge on the separation plate. A swing rod, in conjunction with the separation plate, disperses suspended sludge in the testing environment during the initial testing phase, improving testing accuracy.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0025] Undoubtedly, such and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.

[0026] To make the above and other objects, features and advantages of the present invention more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0028] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of a suspended sludge concentration detection device for the sea according to the present invention.

[0031] Figure 2 This is a partial structural schematic diagram of a device for detecting the concentration of suspended sludge entering the sea according to the present invention.

[0032] Figure 3 This is a schematic diagram of the protective bandage in a device for detecting the concentration of suspended sludge entering the sea according to the present invention;

[0033] Figure 4 This is a cross-sectional view of the floating seat portion of the suspended sludge concentration detection device for the sea according to the present invention;

[0034] Figure 5 This is a side view of a device for detecting the concentration of suspended sludge entering the sea according to the present invention;

[0035] Figure 6 This is a schematic diagram showing the combined state of the air outlet pipe and the separation plate of the suspended sludge concentration detection device for entering the sea according to the present invention.

[0036] Figure 7 This is a top view of the separation plate of a suspended sludge concentration detection device for seawater according to the present invention;

[0037] Figure 8 This is a schematic diagram of the light-emitting component structure of a device for detecting the concentration of suspended sludge entering the sea according to the present invention.

[0038] Explanation of key figure labels:

[0039] 1-Floating seat;

[0040] 2-Connecting housing;

[0041] 21-Light blocking plate;

[0042] 3-Separation components;

[0043] 31-Telescopic pole; 32-Separation plate; 321-Air distribution duct; 322-Arc-shaped groove; 33-Protective bandage; 331-Elastic band; 332-Barrier strip;

[0044] 4-Test Item 1;

[0045] 5-Test Item Two;

[0046] 6-Light-emitting components;

[0047] 61-Fixed housing; 62-Light source column; 63-Spherical cover; 64-Cleaning roller; 65-Fixing block; 66-Limiting block;

[0048] 7-Photodetector;

[0049] 8-Dust collection plate;

[0050] 81- Inclined plate; 82- Moving rod;

[0051] 9-Exhaust pipe;

[0052] 10-Swing bar. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0054] Reference Figure 1-8 In one aspect, the present invention provides a technical solution: a device for detecting the concentration of suspended sludge entering the sea, comprising a floating seat 1, a connecting shell 2, a separating component 3, a test piece 1 4, and a test piece 2 5.

[0055] The connecting housing 2 is located below the floating seat 1, and a light-blocking plate 21 is arranged around the middle of the connecting housing 2. The separation component 3 includes a telescopic rod 31, a separation plate 32, and protective bandages 33. The telescopic rod 31 connects the floating seat 1 and the separation plate 32 and controls the up and down movement of the separation plate 32. The telescopic rod 31 is controlled by electric control or hydraulic cylinder, depending on the usage of the testing device. If a test boat needs to be placed next to the device, it is controlled by hydraulic cylinder, with the control cylinder mounted on the test boat. If it is deployed for testing alone, it is controlled by electric control. If necessary, a solar panel is installed on the top of the floating seat 1 to provide power. Several protective bandages 33 are arranged around the side wall of the separation plate 32, and their two ends are respectively rotatably connected to the inner side of the separation plate 32 and the light-blocking plate 21. The protective bandages 33 include elastic bands 331 and baffles 332. Several baffles 332 are horizontally fixedly connected to the elastic bands 331. Stretching the elastic bands 331 widens the distance between adjacent baffles 332. Test piece 1 4 is placed inside the light-blocking plate 21, and test piece 2 5 is placed below the light-blocking plate 21. The separation plate 32 separates the suspended mud into the sea according to the particle diameter and makes it complete the concentration test in the space where the corresponding two test pieces are located.

[0056] Both test piece 1 (4) and test piece 2 (5) include a light-emitting component (6) and a photodetector (7). The infrared light emitted by the light-emitting component (6) is scattered and / or transmitted after reaching the suspended sludge and is captured by the photodetector (7) to complete the concentration test. Specifically, the photodetector (7) of test piece 1 (4) is a 90° scattering photodetector (7). There are two types of photodetectors (7) for test piece 2 (5): a transmission photodetector (7) and a 90° scattering photodetector (7). The 90° scattering photodetector (7) is set perpendicular to the light path of the light-emitting component (6), while the transmission photodetector (7) is set opposite to the light path of the light-emitting component (6). The light-emitting component 6 includes a fixed housing 61, a light source column 62, a spherical cover 63, and a cleaning roller 64. The fixed housing 61 is connected to the connecting housing 2. The light source column 62 is horizontally disposed within the fixed housing 61, and an infrared emitter is provided on one side of the light source column 62. The spherical cover 63 is rotatably coaxially disposed with the light source column 62. The cleaning roller 64 is rotatably disposed on one side of the light source column 62, and its side wall is provided with several bristles that contact the spherical cover 63. Driving the cleaning roller 64 to rotate causes the spherical cover 63 to rotate around the light source column 62. Furthermore, to increase the rotational resistance of the spherical cover 63, the light-emitting component 6 also includes a fixing block 65 and a limiting block 66. The fixing block 65 is disposed below the spherical cover 63, and the limiting block 66 is slidably disposed above the spherical cover 63, and a spring is provided on the top of the limiting block 66. If necessary, a scraper can be provided between the contact surfaces of the limiting block 66 and the fixing block 65 with the spherical cover 63.

[0057] To separate large particles of suspended sludge from the separation plate 32, a dust collection plate 8 is provided at the bottom of the float seat 1. Several inclined plates 81 are arranged at the bottom of the dust collection plate 8. After the test, the separation plate 32 quickly rises below the dust collection plate 8 and then quickly descends. The large particles of suspended sludge above it continue to rise due to inertia until they reach the inclined plates 81 and pause briefly. Because the dust collection plate 8 is slidably connected to the float seat 1, and a gap is left at the connection point for the dust collection plate 8 to float up and down, the particles inside the inclined plates 81 continue to fall and be carried away by the seawater as the dust collection plate 8 floats up and down due to changes in seawater buoyancy. To increase the range of motion of the dust collection plate 8, a moving rod 82 is provided on the float seat 1. The moving rod 82 is connected to one side of the dust collection plate 8 and drives it to slide at the bottom of the float seat 1. To increase the separation distance between the separation plate 32 and the suspended sludge, the top of the light-blocking plate 21 is provided with several air outlet pipes 9. The top and bottom of the separation plate 32 are both mesh-like. The top of the separation plate 32 is provided with an air distribution groove 321. The bottom of the air distribution groove 321 is V-shaped and has an opening in the middle. One end of the air distribution groove 321 is connected to an arc-shaped groove 322 into which half of the air outlet of the air outlet pipe 9 can be embedded. Part of the gas discharged from the air outlet pipe 9 is discharged from the top of the air distribution groove 321 and part is discharged from the bottom of the air distribution groove 321, thereby promoting the gas discharged from the air outlet pipe 9 to diffuse laterally in the middle layer of the separation plate 32.

[0058] To increase the dispersion of surrounding suspended sludge during the collection process, swing rods 10 are symmetrically provided at the bottom of the connecting housing 2. Several swing rods 10 are rotatably connected to the bottom of the connecting housing 2 in parallel. The separation plate 32 descends to drive the swing rods 10 to swing, increasing the disorder of suspended sludge in the environment around the detection device.

[0059] Secondly, the present invention provides a detection method for a device for detecting the concentration of suspended sludge entering the sea, wherein the detection device described above comprises the following specific steps:

[0060] S1: Deploy the detection device to the point to be detected, and then start it. This causes the separation plate 32 to descend to the bottom of the connecting housing 2, press down one end of the swing rod 10, and then rise to release the swing rod 10. At the same time, the elastic band 331 on the protective bandage 33 is stretched and deformed, which makes the gap between the baffle 332 widen, allowing some seawater to enter the protective bandage 33.

[0061] S2: After standing for 5-10 minutes in the above state, the separation plate 32 will move upward quickly, and the test piece 2 will be activated immediately after it exceeds the test piece 5 to detect the seawater concentration within the test range.

[0062] S3: The separation plate 32 continues to move upward until it exceeds the test piece 4, and then moves downward to below the test piece 4. At this time, the test piece 4 is immediately activated to detect the seawater concentration within the test range.

[0063] S4: The concentrations measured by test specimen 4 and test specimen 5 are processed, and the average value is taken as the concentration of suspended sludge entering the sea in the corresponding area.

[0064] Among them, test piece 1 (4) was tested using the 90° scattering method; test piece 2 (5) was tested using the transmission scattering ratio method.

[0065] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0066] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0067] Furthermore, the described features or characteristics can be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented without the aforementioned specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A device for detecting the concentration of suspended sludge entering the sea, characterized in that, The device includes a floating base, a connecting shell, a separating assembly, test piece one, and test piece two. The connecting shell is located below the floating base, and a light-blocking plate is arranged around its center. The separating assembly includes a telescopic rod, a separation plate, and protective bandages. The telescopic rod connects the floating base and the separation plate and controls the up-and-down movement of the separation plate. Several protective bandages are arranged around the side wall of the separation plate, and their two ends are rotatably connected to the inner sides of the separation plate and the light-blocking plate, respectively. Test piece one is located inside the light-blocking plate, and test piece two is located below the light-blocking plate. The protective bandages include elastic bands and baffles. Several baffles are horizontally fixedly connected to the elastic bands. Stretching the elastic bands widens the distance between adjacent baffles. The separating plate separates suspended sediment into the sea according to particle diameter and performs concentration testing within the space occupied by the corresponding two test pieces. Both test piece one and test piece two include a light-emitting component and a photodetector. The infrared light emitted by the light-emitting component is scattered and / or transmitted after reaching the suspended sludge and is captured by the photodetector to complete the concentration test. The photodetector of test piece one is a 90° scattered light detector; the photodetector of test piece two has two types, namely a transmitted light detector and a 90° scattered light detector; wherein, the 90° scattered light detector is set perpendicular to the optical path of the light-emitting component, and the transmitted light detector is set opposite to the optical path of the light-emitting component.

2. The device for detecting the concentration of suspended sludge entering the sea according to claim 1, characterized in that, The light-emitting component includes a fixed housing, a light source column, a spherical cover, and a cleaning roller. The fixed housing is connected to the connecting housing. The light source column is horizontally disposed inside the fixed housing. The spherical cover is rotatably coaxially disposed with the light source column. The cleaning roller is rotatably disposed on one side of the light source column and its sidewall contacts the spherical cover. Driving the cleaning roller to rotate causes the spherical cover to rotate around the light source column.

3. The device for detecting the concentration of suspended sludge entering the sea according to claim 2, characterized in that, The light-emitting component also includes a fixing block and a limiting block. The fixing block is located below the spherical cover, and the limiting block is slidably located above the spherical cover, with a spring on its top.

4. The device for detecting the concentration of suspended sludge entering the sea according to claim 1, characterized in that, The bottom of the floating seat is equipped with a dust collection plate, and several inclined plates are arranged at the bottom of the dust collection plate. The dust collection plate is slidably connected to the floating seat, and a gap is left at the connection between the two to allow the dust collection plate to float up and down.

5. The device for detecting the concentration of suspended sludge entering the sea according to claim 4, characterized in that, The floating seat is equipped with a movable rod that is connected to one side of the dust collection plate and drives it to slide at the bottom of the floating seat.

6. The device for detecting the concentration of suspended sludge entering the sea according to claim 1, characterized in that, The top of the light-blocking plate is equipped with several air outlet pipes. The top and bottom of the separation plate are mesh-like. The top of the separation plate is equipped with an air distribution groove. One end of the air distribution groove is connected to an arc-shaped groove into which half of the air outlet of the air outlet pipe can be embedded. Part of the gas discharged from the air outlet pipe is discharged from the top of the air distribution groove, and part of it is discharged from the bottom of the air distribution groove. This promotes the lateral diffusion of the gas discharged from the air outlet pipe in the middle layer of the separation plate.

7. The device for detecting the concentration of suspended sludge entering the sea according to claim 1, characterized in that, The bottom of the connecting housing is symmetrically provided with swing rods, and several swing rods are rotatably connected to the bottom of the connecting housing in parallel. The descent of the separation plate drives the swing rods to swing, increasing the disorder of suspended mud in the environment around the detection device.

8. A detection method for a device for detecting the concentration of suspended sludge entering the sea, based on the detection device according to any one of claims 1-7, comprising the following specific steps: S1: Deploy the detection device to the point to be detected, and then start it to lower the separation plate to the bottom of the connecting shell. At this time, the elastic band on the protective bandage is stretched and deformed, which makes the gap between the baffle strip wide, allowing some seawater to enter the protective bandage. S2: After standing for 5-10 minutes in the above state, the separation plate will move upward quickly, and once it exceeds test piece two, test piece two will be activated immediately to detect the seawater concentration within the test range; S3: The separation plate continues to move upward until it exceeds test piece one, and then moves downward to below test piece one. At this time, test piece one is immediately activated to detect the seawater concentration within the test range. S4: Process the concentrations measured by test specimen 1 and test specimen 2, and take the average value as the concentration of suspended sludge entering the sea in the corresponding area. in, Test piece 1 was tested using the 90° scattering method; test piece 2 was tested using the transmission scattering ratio method.

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