A device for monitoring seepage of oil on water surface

Abstract

The utility model provides a kind of water surface sampling leakage oil monitoring device, including floating monitoring body and the accompanying cable of connecting floating monitoring body, the floating monitoring body includes buoy cavity, light shielding cavity, light processor and water pump, the light shielding cavity is located below the buoy cavity, the light processor is set in the light shielding cavity, multiple water inlets are intervally equipped on the side wall of the light shielding cavity and the position of the water inlet is higher than the light processor, the water pump is set below the light shielding cavity and its water inlet end is connected the water outlet of the light shielding cavity bottom, the water outlet end of the water pump is used to discharge the liquid to be measured in the light shielding cavity by water inlet.The utility model can reduce the adhesion of sediment on the surface of light processor, reduce the interference of sediment to oil detection.

Description

Technical Field

[0001] This utility model relates to the field of petroleum monitoring technology, specifically to a water surface sampling petroleum leakage monitoring device. Background Technology

[0002] During oil monitoring, the water in the monitoring well has almost no flow, causing the leaked oil components to stratify within the water. Existing oil fluorescence sensors are generally fixed below the water surface, making it difficult for them to contact the oil components. Furthermore, the water level in the monitoring well fluctuates due to the influence of the groundwater level, causing the oil components concentrated on the water surface to change in height. All these factors make it difficult for fixed-position oil fluorescence sensors to obtain accurate measurement results.

[0003] Furthermore, in stagnant water bodies in the field, biological and mineral deposits easily accumulate over time. These deposits, when deposited on the optical window of the petroleum fluorescence sensor, significantly impact measurement accuracy. Currently, some sensors mitigate this accumulation by wiping the optical window with an electrically driven cleaning brush. However, this method requires applying significant pressure and torque to the optical window, and the brush's drive shaft must pass through the sensor housing, making water and electricity isolation extremely difficult. This negatively impacts the sensor's sealing performance and water pressure resistance. Secondly, deep-seated oil leaks within the monitoring orifice are often located at depths exceeding 100 meters, and current sensors with electrically driven cleaning brushes struggle to meet the required water pressure resistance.

[0004] In summary, there is an urgent need for a water surface sampling oil leakage monitoring device to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this invention is to provide a water surface sampling device for monitoring oil leakage, aiming to solve the problem that the optical window of existing oil fluorescence sensors is easily affected by sediment, resulting in the inability to obtain accurate measurement results. The specific technical solution is as follows:

[0006] A water surface sampling oil leakage monitoring device includes a floating monitoring body and a traveling cable connected to the floating monitoring body. The floating monitoring body includes a float cavity, a light-shielding cavity, a light processor, and a water pump. The light-shielding cavity is located below the float cavity. The light processor is disposed in the light-shielding cavity. Multiple water inlets are spaced apart on the circumferential sidewall of the light-shielding cavity, and the water inlets are positioned higher than the light processor. The water pump is disposed below the light-shielding cavity, and its water inlet is connected to the water outlet at the bottom of the light-shielding cavity. The water outlet of the water pump is used to discharge the liquid to be tested that enters the light-shielding cavity through the water inlets.

[0007] Preferably, the floating monitoring body further includes a water pump mounting cavity located below the light-shielding cavity, the water pump being disposed in the water pump mounting cavity, and the drain end of the water pump being connected to a drain outlet on the wall of the water pump mounting cavity.

[0008] Preferably, the upper end of the accompanying cable is connected to the positioning clamp at the monitoring hole opening, and its lower end is inserted into the interior of the floating monitoring body from the bottom center position.

[0009] Preferably, when the floating monitoring body floats in the liquid to be tested, the water pump mounting cavity, the light-shielding cavity, part of the float cavity, and part of the accompanying cable are all located below the water surface.

[0010] Preferably, the interior of the light-shielding cavity is divided into a water inlet cavity and a detection cavity by a water-passing baffle. The water-passing baffle has a water-passing hole in the middle to enable communication between the water inlet cavity and the detection cavity. The circumferential sidewall of the water inlet cavity is provided with multiple water inlets at intervals. The optical processor is disposed in the detection cavity. The water pump is disposed below the detection cavity and its water inlet is connected to the water outlet at the bottom of the detection cavity.

[0011] Preferably, the top of the floating monitoring body is provided with a hook.

[0012] Preferably, the bottom of the floating monitoring body is provided with a replaceable float or counterweight.

[0013] Preferably, the optical processor includes a photodetector, an LED light source, a quartz glass plate, a light-blocking strip, and a filter. Multiple LED light sources are evenly distributed along the circumference of the photodetector. The quartz glass plate is disposed below the photodetector and the LED light sources. A filter is embedded in the quartz glass plate below the photodetector. A light-blocking strip is provided between the filter and the quartz glass plate.

[0014] Preferably, the optical processor further includes an AD converter, a microprocessor, a controlled constant current source, and a bus driver; the AD converter is disposed between the photodetector and the microprocessor, and is used to convert the light intensity signal of the photodetector into a digital signal and transmit it to the microprocessor; the controlled constant current source is disposed between the microprocessor and the LED light source, and is used to drive the LED light source to generate excitation light according to the instructions of the microprocessor; the bus driver is connected to the microprocessor to realize communication with an external host computer.

[0015] Preferably, the relative position of the photodetector and the LED light source must satisfy the condition that the excitation light emitted by the LED light source will not enter the photodetector after being reflected by the quartz glass plate.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] In this invention's oil leakage monitoring device, the light-shielding cavity is divided into a water inlet cavity and a detection cavity by a water-passing baffle. The water inlet cavity has multiple water inlets spaced apart on its circumferential sidewalls. The optical processor is located in the detection cavity. The pump's suction causes the liquid to be tested to flow into the water inlet cavity from the multiple water inlets. Because the water-passing baffle only has one water passage hole in the middle, the flow rate of the liquid entering the detection cavity increases, creating a forced convection effect. The optical processor is immersed in the detection cavity. The higher flow rate of the liquid reduces the adhesion of deposits to the surface of the optical processor, reducing interference from deposits in oil detection and lowering the cleaning frequency of the optical processor.

[0018] In this invention's oil leakage monitoring device, the lower end of the accompanying cable enters the interior of the floating monitoring body from its bottom center position. The direction of gravity exerted by the accompanying cable on the floating monitoring body is kept coincident with the axis of the floating monitoring body. By placing the water pump and optical processor on the lower side of the floating monitoring body, the overall center of gravity is lowered. These multiple measures ensure that the floating monitoring body of this invention can float stably on the surface of the liquid being tested, preventing it from tilting on the water surface and ensuring that the liquid being tested can smoothly enter the inlet chamber. Simultaneously, placing the water pump and optical processor on the lower side of the floating monitoring body effectively creates forced convection, resulting in a compact structure and small size, reducing the power requirements of the water pump.

[0019] This invention provides a petroleum leakage monitoring device with the advantage of high sensitivity to petroleum detection. Addressing the issue of insufficient sensitivity of existing single-LED sensors for petroleum detection, this invention utilizes UV-B excitation light band LEDs that exhibit strong petroleum reactivity. Furthermore, by increasing the number of LEDs, the excitation light intensity is enhanced, compensating for the insufficient luminous intensity of UV-B band LEDs. This ensures that the excitation light meets the luminous intensity requirements while simultaneously exhibiting strong fluorescence emission towards petroleum, thereby improving the sensitivity to petroleum detection.

[0020] This invention provides a superior oil leakage monitoring device with a higher cost-performance ratio. Traditional sensors require UV-B or even shorter wavelengths for high sensitivity to oil, typically necessitating xenon lamps as the light source. However, this approach is constrained by factors such as product size, structural complexity, and cost. This invention utilizes multiple LED light sources for excitation light output. The smaller LED beads result in a smaller product size, simpler structure, and lower cost compared to existing sensors with similar sensitivity, offering significantly higher cost-performance.

[0021] This invention provides a leak monitoring device with higher measurement accuracy. By incorporating light-blocking strips between the quartz glass plate and the filter, it effectively prevents interference from reflection, transmission, and scattering of incident light within the quartz glass plate. The quartz glass plate itself possesses excellent light transmittance and low loss rate characteristics, effectively reducing the loss of excitation light during its journey to the oil surface and ensuring sufficient emission intensity. The relative position of the photodetector and the LED light source ensures that the excitation light emitted from the LED light source, after reflection by the quartz glass plate, does not enter the photodetector, preventing reflected light from interfering with the measurement results. Through multiple measures, this invention better ensures the effectiveness of the process where excitation light illuminates the target object, generates fluorescence, and is detected by the photodetector, thus achieving higher measurement accuracy.

[0022] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the working status of the oil leakage monitoring device of this utility model;

[0025] Figure 2 yes Figure 1 Cross-sectional view of the floating monitoring body;

[0026] Figure 3 yes Figure 1 Control system diagram of the optical processor;

[0027] Figure 4 yes Figure 1 Schematic diagram of the light propagation path of the optical processor;

[0028] Figure 5 yes Figure 1 A schematic diagram of the structure of the optical processor;

[0029] Among them, 1. Monitoring hole, 2. Hook, 3. Float cavity, 4. Light shielding cavity, 4.1. Water inlet cavity, 4.2. Detection cavity, 4.3. Water passage baffle, 4.4. Water inlet, 4.5. Water passage hole, 4.6. Water outlet, 5. Optical processor, 5.1. Photodetector, 5.2. AD converter, 5.3. Microprocessor, 5.4. Controlled constant current source, 5.5. LED light source, 5.6. Bus driver, 5.7. Quartz glass plate, 5.8. Light blocking strip, 5.9. Filter, 6. Water pump, 6.1. Water inlet end, 6.2. Drain end, 7. Water pump mounting cavity, 7.1. Drain outlet, 8. Traveling cable, 9. First baffle, 10. Second baffle, 11. Detector. Detailed Implementation

[0030] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] Example:

[0033] like Figures 1-5 As shown, this embodiment provides a water surface sampling oil leakage monitoring device, including a floating monitoring body and a traveling cable 8 connected to the floating monitoring body. The floating monitoring body includes a float cavity 3, a light-shielding cavity 4, a light processor 5, and a water pump 6. The light-shielding cavity 4 is located below the float cavity 3. The light processor 5 is disposed in the light-shielding cavity 4. Multiple water inlets 4.4 are spaced apart on the circumferential side wall of the light-shielding cavity 4, and the water inlets 4.4 are positioned higher than the light processor 5. The water pump 6 is disposed below the light-shielding cavity 4, and its water inlet 6.2 is connected to the water outlet 4.6 at the bottom of the light-shielding cavity 4. The water outlet 6.2 of the water pump 6 is used to discharge the liquid to be tested that enters the light-shielding cavity 4 through the water inlet 4.4.

[0034] Specifically, the accompanying cable 8 is used to power the water pump 6 and transmit data information from the optical processor 5. During monitoring, the light-shielding cavity needs to be located below the water surface. The water pump 6 draws the liquid to be tested into the light-shielding cavity through the inlet 4.4. The position of the inlet 4.4 is higher than that of the optical processor 5 to ensure that the optical processor can be immersed in the liquid to be tested, thereby achieving the purpose of obtaining accurate measurement data.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the floating monitoring body further includes a water pump mounting cavity 7 located below the light-shielding cavity 4. The water pump 6 is disposed in the water pump mounting cavity 7, and the drain end 6.2 of the water pump 6 is connected to the drain outlet 7.1 on the wall of the water pump mounting cavity 7 (here, the wall refers to the shell constituting the water pump mounting cavity). Preferably, in this embodiment, a first partition 9 and a second partition 10 are provided in the floating monitoring body, which divide the interior of the floating monitoring body into a float cavity 3, a light-shielding cavity 4, and a water pump mounting cavity 7.

[0036] Preferably, the upper end of the accompanying cable 8 is connected to a positioning clamp at the opening of the monitoring hole 1. The positioning clamp can bear most of the weight of the accompanying cable, reducing the impact of the cable weight on the floating state of the floating monitoring body. The lower end of the accompanying cable 8 enters the interior of the floating monitoring body from the bottom center position. The lower end of the accompanying cable is divided into a U-shaped structure located below the water surface line and enters the interior of the floating monitoring body from the bottom center position. This arrangement ensures that the gravity of the lower cable acting on the floating monitoring body is basically aligned with the axis of the floating monitoring body, allowing the floating monitoring body to float vertically in the liquid to be measured. At the same time, the cable itself in the U-shaped structure is also subject to buoyancy, so this part of the cable will not generate excessive gravity acting on the floating monitoring body.

[0037] like Figure 2 As shown, the interior of the light-shielding cavity 4 is divided into a water inlet cavity 4.1 and a detection cavity 4.2 by a water-passing baffle 4.3. A water-passing hole 4.5 is provided in the middle of the water-passing baffle 4.3 to allow communication between the water inlet cavity 4.1 and the detection cavity 4.2. Multiple water inlets 4.4 are spaced apart on the circumferential sidewall of the water inlet cavity 4.1, evenly distributed circumferentially. The optical processor 5 is disposed in the detection cavity 4.2, and the water pump 6 is disposed below the detection cavity 4.2 (i.e., the water pump mounting cavity is disposed below the detection cavity), with its inlet end 6.2 connected to the outlet 4.6 at the bottom of the detection cavity 4.2. In this embodiment, the structural arrangement of the water inlet cavity 4.1, the water-passing baffle 4.3, and the detection cavity 4.2 creates forced convection of the liquid to be tested. The liquid entering the detection cavity 4.2 has a high flow velocity, reducing the adhesion of deposits to the surface of the optical processor and minimizing interference from deposits in oil detection.

[0038] like Figure 1 As shown, the top of the floating monitoring body is provided with a hook 2. The floating monitoring body can be placed on the surface of the liquid to be tested by using the hook 2. For example, the hook 2 can be connected by a thin line, and the thin line can be slowly released to place the floating monitoring body and the accompanying cable 8 together on the surface of the liquid to be tested.

[0039] Preferably, when the floating monitoring body floats in the liquid to be tested, the water pump mounting cavity 7, the light-shielding cavity 4, part of the float cavity 3, and part of the accompanying cable 8 are all below the water surface. Furthermore, the bottom of the floating monitoring body is equipped with a replaceable float or counterweight. The buoyancy of the floating monitoring body in the liquid to be tested and the size of the floating monitoring body can be adjusted by the float or counterweight to achieve the required floating state during monitoring. When the floating monitoring body requires a larger cross-section (volume) to meet the required floating state, a float can be added to the bottom of the floating monitoring body to reduce its cross-section (volume) and ensure that the floating monitoring body can be smoothly placed into the monitoring hole 1. When the buoyancy of the floating monitoring body itself is too large, causing the float cavity to be partially below the water surface, a counterweight can be added to the bottom of the floating monitoring body to meet the monitoring requirements.

[0040] Furthermore, in this embodiment, when the floating monitoring body is controlled to float in the liquid to be tested, the water surface line is located at 1 / 2 of the height H of the float cavity (that is, the water surface line is located at the middle position of the height of the float cavity). In this embodiment, the height H of the float cavity is taken as 1.1 times the maximum water suction height h of the water pump above the monitoring hole.

[0041] like Figures 3-5 As shown, the optical processor 5 includes a photodetector 5.1, an LED light source 5.5, a quartz glass plate 5.7, a light-blocking strip 5.8, and a filter 5.9. Multiple LED light sources 5.5 are evenly distributed along the circumference of the photodetector 5.1. The quartz glass plate 5.7 is positioned below the photodetector 5.1 and the LED light sources 5.5. A filter 5.9 is embedded in the quartz glass plate 5.7 below the photodetector 5.1. A light-blocking strip 5.8 is provided between the filter 5.9 and the quartz glass plate 5.7.

[0042] Furthermore, the relative positions of the photodetector 5.1 and the LED light source 5.5 must satisfy the condition that the excitation light emitted from the LED light source 5.5, after being reflected by the quartz glass plate 5.7, will not enter the photodetector 5.1. Preferably, the axial direction of the photodetector forms a 40° angle with the emission direction of the excitation light from the LED light source.

[0043] In this embodiment, there are four LED light sources. The four LED light sources emit UV-B band excitation light. Part of the light is reflected on the surface of the quartz glass plate 5.7, but the reflected light will not enter the photodetector 5.1. Part of the excitation light undergoes a series of scattering, reflection, and transmission phenomena within the quartz glass plate 5.7. Due to the influence of the light-blocking strip 5.8, this scattered, reflected, and transmitted light also cannot enter the photodetector 5.1. The remaining excitation light passes through the quartz glass plate 5.7 and enters the light-collecting range (i.e., the detection area). After the excitation light illuminates the detector 11 (i.e., the liquid to be tested) in the light-collecting range, the surface of the detector 11 emits light in all directions. The emitted light entering the filter 5.9 is filtered, and only the emitted light 5.9 of the petroleum can pass through the filter 5.9 and enter the photodetector 5.1.

[0044] The optical processor 5 further includes an AD converter 5.2, a microprocessor 5.3, a controlled constant current source 5.4, and a bus driver 5.6. The AD converter 5.2 is disposed between the photodetector 5.1 and the microprocessor 5.3, and is used to convert the light intensity signal of the photodetector 5.1 into a digital signal and transmit it to the microprocessor 5.3. The controlled constant current source 5.4 is disposed between the microprocessor 5.3 and the LED light source 5.5, and is used to drive the LED light source 5.5 to generate excitation light according to the instructions of the microprocessor 5.3. The bus driver 5.6 is connected to the microprocessor 5.3 and communicates with an external host computer through a traveling cable.

[0045] The principle of oil monitoring using the floating monitoring body in this embodiment is as follows:

[0046] The floating monitoring body is powered on for preheating preparation. The water pump 6 works to draw the liquid to be tested from the inlet 4.4 into the inlet chamber 4.1 and the detection chamber 4.2, and then discharges it from the outlet 7.1.

[0047] When the LED light source 5.5 is turned off, the photodetector 5.1 measures the background light intensity of the liquid to be tested. The background light intensity is converted into a corresponding digital signal by the AD converter 5.2 and stored in the microprocessor 5.3. When the LED light source 5.5 is turned on, the excitation light shines on the detector (i.e., the liquid to be tested) through the quartz glass plate 5.7, generating emitted light that propagates to the filter 5.9. The filter 5.9 filters out light outside the spectrum of the emitted light to be measured, and the emitted light of the remaining measurement spectrum passes through the filter 5.9 to the photodetector. The photodetector measures the emitted light intensity at this time, converts the emitted light intensity into a corresponding digital signal by the AD converter 5.2, stores it in the microprocessor, and subtracts it from the background light digital signal. If the difference between the digital signal at this time and the digital signal when no excitation light is emitted is not zero, the detection result is that oil is present. If the difference between the digital signal at this time and the digital signal when no excitation light is emitted is zero, the detection result is that no oil is present.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for monitoring oil leakage through water surface sampling, characterized in that, The device includes a floating monitoring body and a traveling cable (8) connected to the floating monitoring body. The floating monitoring body includes a float cavity (3), a light-shielding cavity (4), a light processor (5), and a water pump (6). The light-shielding cavity (4) is located below the float cavity (3). The light processor (5) is disposed in the light-shielding cavity (4). Multiple water inlets (4.4) are spaced apart on the circumferential side wall of the light-shielding cavity (4), and the position of the water inlets (4.4) is higher than that of the light processor (5). The water pump (6) is disposed below the light-shielding cavity (4), and its water inlet (6.1) is connected to the water outlet (4.6) at the bottom of the light-shielding cavity (4). The drain end (6.2) of the water pump (6) is used to discharge the liquid to be tested that enters the light-shielding cavity (4) through the water inlet (4.4).

2. The oil leakage monitoring device for water surface sampling according to claim 1, characterized in that, The floating monitoring body also includes a water pump mounting cavity (7) located below the light-shielding cavity (4), and the water pump (6) is disposed in the water pump mounting cavity (7). The drain end (6.2) of the water pump (6) is connected to the drain outlet (7.1) on the wall of the water pump mounting cavity (7).

3. The oil leakage monitoring device for water surface sampling according to claim 2, characterized in that, The upper end of the accompanying cable (8) is connected to the positioning clamp at the opening of the monitoring hole (1), and its lower end is connected to the interior of the floating monitoring body from the bottom center position.

4. The oil leakage monitoring device for water surface sampling according to claim 3, characterized in that, When the floating monitoring body floats in the liquid to be tested, the water pump mounting cavity (7), the light shielding cavity (4), part of the float cavity (3), and part of the accompanying cable (8) are all located below the water surface.

5. The oil leakage monitoring device for water surface sampling according to claim 1, characterized in that, The interior of the light-shielding cavity (4) is divided into a water inlet cavity (4.1) and a detection cavity (4.2) by a water-passing baffle (4.3). The water-passing baffle (4.3) has a water-passing hole (4.5) in the middle to enable communication between the water inlet cavity (4.1) and the detection cavity (4.2). The circumferential sidewall of the water inlet cavity (4.1) is provided with multiple water inlets (4.4) at intervals. The optical processor (5) is located in the detection cavity (4.2). The water pump (6) is located below the detection cavity (4.2) and its water inlet end (6.1) is connected to the water outlet (4.6) at the bottom of the detection cavity (4.2).

6. The oil leakage monitoring device for water surface sampling according to claim 1, characterized in that, The top of the floating monitoring body is equipped with a hook (2).

7. The oil leakage monitoring device for water surface sampling according to claim 1, characterized in that, The bottom of the floating monitoring body is equipped with a replaceable float or counterweight.

8. The oil leakage monitoring device for water surface sampling according to any one of claims 1-7, characterized in that, The optical processor (5) includes a photodetector (5.1), an LED light source (5.5), a quartz glass plate (5.7), a light-blocking strip (5.8), and a filter (5.9). Multiple LED light sources (5.5) are evenly distributed around the circumference of the photodetector (5.1). The quartz glass plate (5.7) is located below the photodetector (5.1) and the LED light sources (5.5). The filter (5.9) is embedded in the quartz glass plate (5.7) below the photodetector (5.1). A light-blocking strip (5.8) is provided between the filter (5.9) and the quartz glass plate (5.7).

9. The oil leakage monitoring device for water surface sampling according to claim 8, characterized in that, The optical processor (5) further includes an AD converter (5.2), a microprocessor (5.3), a controlled constant current source (5.4), and a bus driver (5.6); the AD converter (5.2) is located between the photodetector (5.1) and the microprocessor (5.3), and is used to convert the light intensity signal of the photodetector (5.1) into a digital signal and transmit it to the microprocessor (5.3); the controlled constant current source (5.4) is located between the microprocessor (5.3) and the LED light source (5.5), and is used to drive the LED light source (5.5) to generate excitation light according to the instructions of the microprocessor (5.3); the bus driver (5.6) is connected to the microprocessor (5.3) to realize communication with an external host computer.

10. The oil leakage monitoring device for water surface sampling according to claim 8, characterized in that, The relative positions of the photodetector (5.1) and the LED light source (5.5) must satisfy the following condition: the excitation light emitted by the LED light source (5.5) will not enter the photodetector (5.1) after being reflected by the quartz glass plate (5.7).

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